KR102075501B1 - Door hinge device with hydraulic damping function - Google Patents

Abstract

According to an aspect of the present invention, a door hinge device with a hydraulic damping function comprises: a housing fixed on a door to rotate with the door and provided with an accommodation space formed therein; a camshaft which is inserted into the accommodation space, allows one end thereof to be fixed on a door frame or an installation surface, and has a cam; an elastic member installed in the accommodation space to apply an elastic force in a longitudinal direction; a slider which receives an elastic force of the elastic member to form a contact surface coming in contact with the cam to be accommodated in the accommodation space, rotates with the door around the shaft to allow the contact surface to be supported on the cam to reciprocate along the accommodation space, and has a connection shaft in the reciprocation direction; and a damping unit which is connected to the connection shaft to be installed on the housing, and generates a damping force by the pressure of fluid applied to a piston installed therein to move with the slider. According to the present invention, a damping force is stably transferred to a door to increase reliability for speed control of the door. In addition, a multi-stage sliding structure is provided on the door to control elastic force application by considering the properties when the door is closed and the door is opened to provide a damping force of a spring or fluid for the door for speed control even if the door is rapidly closed and to secure safety and reliability for opening and closing operations of the door.

Description

Door hinge device with hydraulic damping function

The present invention relates to a door hinge device having a hydraulic damping function, and more particularly to a door hinge device having a hydraulic damping function to increase the reliability of the speed control of the door by stably transmitting the damping force to the door. It is about.

In general, a door such as an entrance door or a shower booth is used by glass doors using tempered glass not only in terms of function but also in appearance. These glass doors are usually opened and closed by opening and closing methods, and hinge devices are installed on one side of the glass and on the wall surface.

As a technology related to a hinge device for a conventional glass door has been proposed "door hinge device" of Korean Patent No. 10-1186017, which allows the rotation opening and closing of the door, in the hinge device using hydraulic pressure, The hinge device is coupled to the door to move with the door, the coupling receiving portion having a receiving space for receiving a fluid therein; Located in the receiving space portion, one end is protruded from the coupling receiving portion and the shaft portion fixed to the door frame; A moving part positioned in the accommodation space and connected to the shaft to enable reciprocating movement in the longitudinal direction of the accommodation space and rotation about an angle about the shaft; It is located in the receiving space, the elastic portion for pressing the one end of the moving portion; includes, the shaft portion includes a protrusion protruding eccentrically on the outer surface, the moving portion is formed on one side and rotates about the roller shaft Including a roller having a roller, the moving part rotates about the shaft portion at the time of opening the door, and at the same time the roller rotates along the outer surface of the protrusion so that the moving part moves in the longitudinal direction of the receiving space portion Press the elastic part.

However, such a conventional technique uses a hydraulic damping force, but lacks a configuration to provide a stable damping force, and has a problem in that it cannot secure reliability for damping operation.

In addition, such a prior art is to prevent the problem that the moving part moves very slowly in the opposite direction of the elastic part when the door is closed, so that the outer surface of the protrusion is in contact with the roller, so that the speed of closing the door cannot be reduced. In addition, the rapid prevention portion is formed in the connecting portion, and the other side of the protrusion has been proposed to be in contact with the rapid prevention portion, but this also has a temporal gap until the other side of the protrusion is in contact with the sudden rotation prevention portion, such a time gap Esau still had limitations that could not reduce the closing speed of the door.

As such, in the conventional glass door hinge device as well as the prior art, when the door is closed quickly, the restoring force of the spring does not quickly reach correspondingly, so that the restoring force of the spring cannot be properly transmitted, and thus the size may be different. However, the force to reduce the closing speed on the door was not applied, there was a problem that the section in which the door is idle.

In order to solve the problems of the prior art as described above, the present invention is to ensure that the damping force is transmitted to the door reliably, to improve the reliability of the speed control of the door, and further, the case of closing and opening the door By providing a multi-stage sliding structure to adjust the application of elastic force in consideration of characteristics, even if the door is closed quickly, spring or fluid damping force is provided for the speed adjustment to the door, thereby providing a safety and reliability for the opening and closing operation of the door The purpose is to secure.

Other objects of the present invention will be readily understood through the following description of the embodiments.

In order to achieve the above object, according to an aspect of the present invention, the housing is fixed to the door to rotate with the door, the receiving space is formed inside; A cam shaft inserted into the accommodation space, one end of which is fixed to the door frame or the installation surface, and the cam being formed; An elastic member installed to apply an elastic force in the longitudinal direction to the accommodation space; A contact surface to which the cam contacts with the elastic force of the elastic member is formed and received in the accommodation space, and rotates together with the door about the axis to support the contact surfaces respectively to the cam, thereby reciprocating along the accommodation space. And a slider provided with a connecting shaft along the reciprocating direction; And a damping unit connected to the connection shaft and installed in the housing and generating a damping force by the pressure of a fluid applied to a piston installed inside to move together with the slider. A door having a hydraulic damping function; Hinges are provided.

The damping part may include: a damping housing part in which a working fluid is filled inside, first and second sealing parts are provided at both ends to be sealed, and fixed to the housing; A piston which penetrates the second sealing part and is inserted into the damping housing part and has a head provided to receive a pressure of a working fluid; The body into which the head is inserted is fixed to the inside of the damping housing part, and the inner space of the body is divided into first and second spaces in contact with the first and second sealing parts, respectively, by the head. A damping chamber in which a main flow path connecting the first and second spaces is formed to provide a working fluid moving path between the first and second spaces for damping and a mounting groove is formed on an outer surface of the body; And an elastic piece adapted to be blocked in the main flow path by a ball seated from the outside to the main flow path, and an elastic piece elastically supporting the ball to be seated in the main flow path in the mounting groove, so that the piston moves when the piston moves. May include a one-way controller configured to move in one direction between the first and second spaces.

The damping housing part may have a male screw part formed to be screwed to the housing, and an end may protrude from the housing to form a knob.

Both ends of the piston are slidably coupled to the first and second sealing parts, the head is slidably coupled to the piston rod, and fixing pieces are respectively provided in fitting grooves formed at both sides of the head in the piston rod. By inserting the head is fixed so that the movement is suppressed by the fixing piece, a bypass flow path for connecting both sides of the head to bypass the head is formed, screwed to one end exposed from the first sealing portion The degree of opening of the bypass passage may be controlled by the damping adjustment bolt.

The cam shaft is formed with a plurality of cams each having a different shape, and the slider is formed with a plurality of contact surfaces for contacting the cams, respectively, and the cams are in contact with each other according to the opening angle of the door. By changing the contact surface, it is possible to restrain idle running from which the elastic force is not applied from the elastic member.

The camshaft is configured such that the plurality of cams are formed of a first cam and a second cam, and the first cam is larger in width than the second cam, and the slider has the plurality of contact surfaces of the first cam. The first contact surface in contact with the cam and the second contact surface in contact with the second cam, the first contact surface having a curvature surface concave toward the first cam, such that the door includes full opening. The first cam is pressed by the first cam in a full front and rear sections of the door, and the second contact surface has a curvature surface convex toward the second cam, so that the front and rear sections of the door include the closed state. It can be pressed against the second cam.

According to the door hinge device having a hydraulic damping function according to the present invention, by allowing the damping force to be transmitted to the door stably, it is possible to increase the reliability of the speed control of the door, furthermore, the characteristics of each case when the door is closed and opened By providing a multi-stage sliding structure to adjust the application of elastic force in consideration of this, even if the door is closed quickly, spring or fluid damping force can be provided for the speed adjustment to the door, thereby safety and reliability of the opening and closing operation of the door Can be secured.

1 is a perspective view illustrating a mounting state of a door hinge device having a hydraulic damping function according to an embodiment of the present invention, showing a closed state of a glass door.
Figure 2 is a perspective view showing the mounting state of the door hinge device having a hydraulic damping function according to an embodiment of the present invention, a perspective view showing a state where the glass door is opened at 90 degrees.
3 is an exploded perspective view showing a door hinge device having a hydraulic damping function according to an embodiment of the present invention.
Figure 4 is an exploded perspective view showing a door hinge device having a hydraulic damping function in another direction according to an embodiment of the present invention.
Figure 5 is a side view showing a door hinge device having a hydraulic damping function according to an embodiment of the present invention.
6 is a cross-sectional view taken along line AA.
7 is a cross-sectional view taken along line BB.
8 is a perspective view illustrating a damping chamber and a piston of a damping unit in a door hinge apparatus having a hydraulic damping function according to an embodiment of the present invention.
FIG. 9 is a perspective view illustrating the damping chamber and the one-way controller separated from the damping unit in the door hinge device having the hydraulic damping function according to the exemplary embodiment of the present invention.
10 is a cross-sectional perspective view illustrating a damping unit in a door hinge apparatus having a hydraulic damping function according to an embodiment of the present invention.
11 is a side view illustrating main parts of a door hinge device having a hydraulic damping function according to an embodiment of the present invention.
FIG. 12 is a bottom view of FIG. 11 and illustrates a state according to the opening angle of the door.
FIG. 13 is a cross-sectional view taken along the line CC of FIG. 11, illustrating a state according to the opening angle of the door.
FIG. 14 is a cross-sectional view taken along the line DD of FIG. 11, illustrating a state according to the opening angle of the door.

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, but should be understood in a way that includes all changes, equivalents, and substitutes included in the spirit and scope of the present invention, and may be modified in various other forms. It is to be understood that the scope of the present invention is not limited to the following examples.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and like reference numerals denote the same or corresponding elements regardless of reference numerals, and redundant description thereof will be omitted.

1 is a perspective view showing a state in which a door hinge device having a hydraulic damping function according to an embodiment of the present invention is mounted, a perspective view showing a closed state of the glass door, Figure 2 is a hydraulic pressure according to an embodiment of the present invention A perspective view showing a state in which a door hinge device having a damping function is mounted, wherein the glass door is opened at 90 degrees.

1 and 2, the door hinge device 10 having a hydraulic damping function according to an embodiment of the present invention, for example, while supporting the door 30 is installed in the door frame 20, the door 30 It is possible to have a restoring force within a certain angle range while maintaining a fully open state during the rotation. Here, the door frame 20 is hinged to at least one door 30, and furthermore, the shaft of the door hinge device 10 having a hydraulic damping function, that is, the lower end of the cam shaft 200 (shown in FIGS. 3 and 4). It may include a fixed frame 21 to rotatably fix to the installation surface, such a fixed frame 21 may be provided separately as in this embodiment, or may be provided to form an integral as another example. In addition, the door 30 has an upper frame 32 and a lower frame 33 for installation of the door hinge device 10 having the upper and lower ends of the reinforced glass 31 having hinge coupling or hydraulic damping functions as in the present embodiment. ) Are attached to each other, such that the upper frame 32 and the lower frame 33 may be mediated by the hinge coupling.

3 to 7, the door hinge device 10 having a hydraulic damping function according to an embodiment of the present invention includes a housing 100, a cam shaft 200, an elastic member 300, a slider 400, and The damping unit 500 may be included.

The housing 100 is fixed to the door 30, for example, the lower frame 33 (see FIG. 1) so as to rotate together with the door 30 (see FIGS. 1 and 2), and an accommodation space 110 is formed inside. The housing 100 has an opening 120 to be fixed to the door frame 20 (shown in FIGS. 1 and 2), for example, the fixed frame 21 (shown in FIG. 1) or the mounting surface by lowering the cam shaft 200 downwardly. ) Can be formed.

The housing 100 has a damping part 500 which will be described later on the female screw part 131 formed on the first cover 130 by fixing the first cover 130 to one side of the accommodation space 110 by bolting. May be screwed together, thereby allowing one side of the accommodation space 110 to be blocked. In addition, the housing 100 has a female thread 111 formed on the other side of the accommodation space 110, so that the second cover 140 is screwed so that the other side of the accommodation space 110 is blocked.

The cam shaft 200 is inserted vertically in the receiving space 110, one end is fixed to the door frame 20, for example, the fixed frame 21 or the mounting surface, cams 220, 230 of different shapes are formed in a number of upper and lower, respectively In this embodiment, the cams 220 and 230 are formed in two stages, but the present invention is not limited thereto, and the number may be further increased as necessary. Here, the cams 220 and 230 may be installed on the shaft member 210. The shaft member 210 may be coupled to one end so as to be relatively rotatable inside the housing 100 by, for example, a ball bearing 251 and a thrust bearing 252, and the other end of the shaft member 210 and the roller bearing 254. It can be fixed to the fixing frame 21 (shown in FIG. 1), the mounting surface or the like. On the other hand, the shaft member 210, when installed on the fixed frame 21 or the installation surface, in order to be supported by a bearing, etc., a support end 240 in the form of a flange may be formed.

The cam shaft 200 may include a plurality of cams 220 and 230 as the first cam 220 and the second cam 230, and the first cam 220 is formed to have a larger maximum width than the second cam 230. Can be. Accordingly, the first and second cams 220 and 230 may selectively contact the respective contact surfaces 410 and 420, which will be described later, in some sections of the opening section of the door 30.

The elastic member 300 is installed to apply an elastic force in the longitudinal direction to the receiving space 110 to provide an elastic force to the slider 400 to be described later, it may be composed of a compression coil spring as in this embodiment, but is not limited thereto. Of course, it can also be configured as a tension coil spring through the switching of the installation position and the direction of applying the elastic force.

The slider 400 is provided with a plurality of contact surfaces 410 and 420 for contacting each of the cams 220 and 230 by receiving the elastic force of the elastic member 300, and may be accommodated in the accommodation space 110, respectively, and the cam shaft 200. By rotating with the door 30 (shown in FIGS. 1 and 2) around the contact surfaces 410 and 420 are supported by the cams 220 and 230, respectively, the reciprocating movement along the receiving space 110, the opening angle of the door 30 By changing the cams 220 and 230 and the contact surfaces 410 and 420 in contact with each other, the door 30 (refer to FIGS. 1 and 2) may suppress an idle state in which the elastic force is not applied from the elastic member 300.

The slider 400 is, for example, a second contact surface 420 in contact with the first contact surface 410 and the second cam 230, in which a plurality of contact surfaces 410 and 420 contact the first cam 220, as in this embodiment. Can be done. Here, the first contact surface 410 has a concave curvature surface toward the first cam 220, so that the door 30 (shown in FIGS. 1 and 2) before and after full opening of the door 30 including full opening. In the section, the first cam 220 may be pressed. In this case, the opening angle of the door 30 may be 0 to 70 degrees, specifically, 0 to 45 degrees. In addition, the second contact surface 420 has a convex curvature surface toward the second cam 230, so that the second contact surface 420 is pressed against the second cam 230 in a front and rear section of the door 30 including the closed state of the door 30. Can be. Here, the front and rear sections of the door 30 may have an opening angle of 15 to 90 degrees, specifically 45 to 90 degrees. The second contact surface 420 has a concave curvature surface 421 toward the second cam 230, but has a concave curvature 422, 423 on both sides so that the width of the concave curvature surface 421 is sharply reduced. Protrusions 424 may be formed.

The slider 400 may be formed with a through hole 430 such that the cam shaft 200 penetrates vertically through the lower portion, and a plurality of contact surfaces 410 and 420 may be formed on the inner surface of the through hole 430. By being connected to the damping unit 500, the damping force by the pressure of the fluid applied from the damping unit 500 may be transmitted to the door 30 (shown in FIGS. 1 and 2).

The damping unit 500 may be installed in the housing 100 by being connected to a connecting shaft 440 provided along the reciprocating direction in the slider 400, and installed inside the piston to move together with the slider 400 ( Damping force may be generated by the pressure of the fluid applied to 520.

Referring to FIGS. 3, 4, 8 and 10, the damping unit 500 may include a damping housing 510, a piston 520, a damping chamber 530, and a one-way controller 540. The damping unit 500 provides a damping force through the slider 400 in which the elastic energy of the elastic member 300 is accumulated by the opening force of the door 30 (shown in FIGS. 1 and 2). It will control the closing speed.

The damping housing part 510 may be filled with a working fluid, for example, oil, and provided with first and second sealing parts 511 and 512 for sealing at both ends thereof and may be fixed to the housing 100. Here, the first sealing part 511 may be provided to be integrated with one end of the damping housing part 510 as in the present embodiment, or may be manufactured and coupled separately from the damping housing part 510 as another example, and the piston 520. In order to penetrate the through hole (not shown) may be formed. The second sealing part 512 is detachably fixed to the female screw part 515 formed inside the other end of the damping housing part 510 as in this embodiment, or is integrated with the damping housing part 510 as another example. It may be manufactured to achieve a, a through hole (not shown) may be formed to penetrate the piston 520, a sealing member such as an O-ring may be installed to maintain the airtight in the coupling portion with other components. .

The damping housing part 510 may be formed with a male screw part 514 on an outer circumferential surface of the damping housing part 510 in order to be screwed to the female screw part 131 formed on the first cover 130 of the housing 100. When the screw is coupled to the 130, the locking jaw 513 may be formed on the outer circumferential surface of the first cover 130 so as to be caught. The damping housing 510 may protrude an end from the first cover 130 of the housing 100 to form a knob 516 for gripping when the screw is fastened to the first cover 130. . In addition, the damping housing 510 may have a thrust bearing 517 or the like installed therein to support the piston 520.

The piston 520 may be inserted into the damping housing part 510 through the second sealing part 512, and the head 521 may be provided to receive the pressure of the working fluid. The piston 520 is connected to the slider 400 by, for example, a connecting shaft 440 which is screwed through the male screw coupling portion 441 to the female screw coupling portion 522 formed at the end of the piston rod 527. By being connected, the reciprocating motion is integrated with the slider 400.

The piston 520 may be provided such that the piston rod 527 extends to both sides of the head 521, and both ends of the piston 520 are slidably coupled to the first and second sealing parts 511 and 512, respectively. In order to improve formation or assembling of the 521, the head 521 is fixed to the fitting piece 526 by fitting the fitting pieces 526 into the fitting grooves 525 formed on both sides of the head 521 in the piston rod 527. 526 may be fixed to suppress movement, and a bypass flow passage 523 may be formed to connect both sides of the head 521 to bypass the head 521, thereby causing the damping chamber 530. Pressure between the first and second spaces 531 and 532 of the bypass passage 523 by a damping adjustment bolt 524 screwed to one end exposed from the first sealing part 511. The degree of opening can be adjusted. Damping adjustment bolt 524 can adjust the opening and closing amount of the bypass passage 523 by tightening and loosening, it is possible to adjust the damping force by adjusting the passage amount of the working fluid, thereby adjusting the damping speed In addition, a straight groove, a cross groove, a wrench groove, or the like may be formed for insertion of the jig during rotation.

The damping chamber 530 may include a body 537, a main flow path 533, and a mounting groove 534.

Body 537 is the head 521 of the piston 520 is inserted into the inside fixed to the damping housing 510, the working fluid is filled in the inner space 538, the inner side by the head 521 The space 538 is divided into first and second spaces 531 and 532 which are in contact with the first and second sealing parts 511 and 512, respectively, and a main passage 533 which connects the first and second spaces 531 and 532 is provided. It is formed to provide a working fluid movement path between the first and second spaces (531, 532) for damping, the mounting groove 534 may be formed on the outer surface of the body (537).

The body 537 may be formed of, for example, a cylindrical hollow member having both ends open, and both ends of the body 537 may be fixed by the first and second sealing parts 511 and 512 in the damping housing 510. The body 537 or the piston 520 may be configured to allow movement of the working fluid in various manners or structures in order to prevent damage caused by excessive pressure of the working fluid when the door or the like is to be closed after being opened.

The main flow path 533 connects the second space 532 to the outside of the body 537 and the ball seating hole 533a in which the ball 541 of the one-way control part 540 is seated for blocking from the outside. It may be formed, a through hole (533d) for connecting the first space 531 to the outside on the side of the body 537 may be formed, the ball seating hole (533a) and the outer surface of the body (537) Connection grooves 533b and 533c may be formed to connect the through holes 533d. The connection grooves 533b and 533c may be formed on the outer surface of the body 537 to be connected to the ball seating hole 533a and face the through hole 533d, and the depth increases toward the ball seating hole 533a. The operation channel 533b and the connection channel 533c formed on the outer surface of the body 537 to connect the operation channel 533b and the passage hole 533d may be included. Accordingly, the main flow path 533 may provide a moving passage between the first and second spaces 531 and 532 of the working fluid that is isolated from the head 521 reciprocating alone without the help of another flow path.

The mounting groove 534 may be formed on the outer surface of the body 537 so that the elastic piece 542 elastically supports the ball 541 of the one-way control unit 540 to be seated in the ball seating hole 533a. The mounting groove 534 may be formed along the outer circumference of the body 537 so that the elastic piece 542 intersects the ball seating hole 533a so as to stably support the ball 541.

The damping chamber 530 is connected to the ball seating hole 533a at the inner side of the body 537, so that an adjustment flow path (not shown) for adjusting the initial closing speed of the door may be formed, and the working fluid is the head 521. At least one other control passage (not shown) may be formed on the inner side of the inner surface so as to move between the first and second spaces 531 and 532 by bypassing the reference numeral).

The one-way controller 540 blocks the main passage 533 by the ball 541 seated on the outside of the main passage 533, and elastically supports the ball 541 to be seated on the main passage 533. The elastic piece 542 is mounted in the mounting groove 534, so that the working fluid moves in one direction between the first and second spaces 531 and 532 when the piston 520 moves. As such, the one-way controller 540, for example, to move the door in one direction to reduce the damping force when opening, for example, one direction from the first space 531 to the second space 532, the elasticity similar to the leaf spring It is configured to open and close the main flow path 533 in one direction by limiting the moving direction of the working fluid by the ball 541 elastically supported by the piece 542. The elastic piece 542 may be provided so that the position fixing protrusion 543 which is seated on the side of the working flow path 533b may protrude so as to maintain a position for stably and elastically supporting the ball 541.

The operation of the door hinge device having a hydraulic damping function according to the present invention will be described.

As shown in FIG. 12, when the door 30 (see FIGS. 1 and 2) is opened at 0 degrees, 8 degrees, 15 degrees, 45 degrees, 70 degrees, and 90 degrees, respectively, with the camshaft 200 fixed, FIG. As shown in FIGS. 13 and 14, when the opening angle of the door 30 is 0 degrees, that is, in the closed state, and the 8 degrees and 15 degrees in which the door 30 starts to open, the second cam 230 is the second cam. While the elastic member 300 is compressed while keeping the contact surface 420 in close contact with the contact surface 420, the first cam 220 is spaced apart from the first contact surface 410. As such, the first cam 220 and the first cam 220 are spaced apart from each other. Even if the contact surface 410 is spaced apart from each other, the second cam 230 and the second contact surface 420 are in contact with each other to be supported, so that the elastic force of the elastic member 300 is continuously applied, and together with the damping part 500 The damping force may also be transmitted to the door 30. In particular, even when the damping force of the damping unit 500 is transmitted through the slider 400, the second cam 230 is in close contact with the second contact surface 420 within the opening angle range of the door 30. Due to the maintenance of the state, it is possible to avoid the idle state in which the elastic force or the damping force is not applied to the door 30.

In addition, when the door 30 (refer to FIGS. 1 and 2) is opened to be opened safely, for example, when the opening angles of the door 30 are 45 degrees, 70 degrees, and 90 degrees, the first cam 220 has the first contact surface. While compressing the elastic member 300 while maintaining a close contact with the 410, the second cam 230 is spaced apart from the second contact surface 420, the first cam 220 and the first contact surface 410 ), The elastic force to the damping force to the door 30 is continuously provided by the close contact, and the control of the opening and closing of the door 30 can be made stable.

As such, according to the present invention, the damping force is stably transmitted to the door, thereby increasing the reliability of the speed control of the door.

In addition, according to the present invention, by providing a multi-stage sliding structure so that the application of the elastic force is adjusted in consideration of the characteristics of the case when the door is closed and opened, even if the door is quickly closed, the damping force of the spring or fluid for the speed adjustment to the door It can be provided, thereby ensuring the safety and reliability of the opening and closing operation of the door.

As described above with reference to the accompanying drawings, the present invention, of course, various modifications and variations can be made within the scope without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

20: door frame 21: fixed frame
30: door 31: glass
32: upper frame 33: lower frame
100: housing 110: accommodation space
111: female thread portion 120: opening
130: first cover 131: female thread
140: second cover 200: camshaft
210: shaft member 220: first cam
230: second cam 240: support end
251: ball bearing 252: thrust bearing
253: washer 254: roller bearing
300: elastic member 400: slider
410: first contact surface 420: second contact surface
421: concave curvature surface 422,423: concave curvature
424: protrusion 430: through hole
440: connecting shaft 441: coupling
500: damping part 510: damping housing part
511: first sealing portion 512: second sealing portion
513: engaging jaw 514: male thread portion
515: female thread 516: knob
517: thrust bearing 520: piston
521 head 522 coupling portion
523: bypass euro 524: damping adjustment bolt
525: fitting groove 526: fixing piece
527: piston rod 530: damping chamber
531: first space 532: second space
533 Main Euro 533a Ball seating hole
533b: Operating Euro 533c: Connecting Euro
533d: Through hole 534: Mounting groove
537 body 538 inner space
540: one-way control unit 541: ball
542: elastic piece 543: position fixing protrusion

Claims (6)

A housing fixed to the door to rotate together with the door and having a receiving space formed therein;
A cam shaft inserted into the accommodation space, one end of which is fixed to the door frame or the installation surface, and the cam being formed;
An elastic member installed to apply an elastic force in the longitudinal direction to the accommodation space;
A contact surface to which the cam contacts with the elastic force of the elastic member is formed and received in the accommodation space, and rotates together with the door about the cam axis to support the contact surfaces respectively to the cam to reciprocate along the accommodation space. A slider which is moved and provided with a connecting shaft along the reciprocating direction; And
A damping unit connected to the connection shaft and installed in the housing and generating a damping force by a pressure of a fluid applied to a piston installed inside to move together with the slider;
Including,
The damping unit,
A damping housing part filled with a working fluid inside, provided with first and second sealing parts at both ends for sealing, and fixed to the housing;
A piston which penetrates the second sealing part and is inserted into the damping housing part and has a head provided to receive a pressure of a working fluid;
The body into which the head is inserted is fixed to the inside of the damping housing part, and the inner space of the body is divided into first and second spaces in contact with the first and second sealing parts, respectively, by the head. A damping chamber in which a main flow path connecting the first and second spaces is formed to provide a working fluid moving path between the first and second spaces for damping and a mounting groove is formed on an outer surface of the body; And
The main flow path is blocked by a ball seated on the outside of the main flow path, and an elastic piece elastically supporting the ball to be seated on the main flow path is mounted in the mounting groove, so that the working fluid is moved when the piston moves. A one-way controller configured to move in one direction between the first and second spaces;
To include, the door hinge device having a hydraulic damping function. delete The method according to claim 1,
The damping housing unit,
The male screw portion is formed to be screwed to the housing, the end of the door hinge device having a hydraulic damping function to protrude from the housing to form a knob. The method according to claim 1,
The piston is
Both ends are slidably coupled to the first and second sealing parts, the head is slidably coupled to the piston rod, and the fixing pieces are respectively fitted in fitting grooves formed at both sides of the head in the piston rod. Damping adjustment bolt is fixed to the head is fixed so that the movement is suppressed by the fixing piece, the bypass passage for connecting both sides of the head to bypass the head, screwed to one end exposed from the first sealing portion The door hinge device having a hydraulic damping function, by which the opening degree of the bypass passage is adjusted by the. The method according to claim 1,
The camshaft,
Cams of different shapes are formed in a plurality of upper and lower, respectively,
The slider,
Contact surfaces for contacting each of the cams are formed in a number of upper and lower, respectively, and the cam and the contact surface in contact with each other is changed according to the opening angle of the door, so as to suppress the idle rotation is not applied to the elastic member, Door hinge device with hydraulic damping function. The method according to claim 5,
The camshaft,
The plurality of cams are composed of a first cam and a second cam, the first cam is formed to have a maximum width compared to the second cam,
The slider,
The plurality of contact surfaces include a first contact surface in contact with the first cam and a second contact surface in contact with the second cam,
The first contact surface,
By having a curvature surface concave toward the first cam, the door is pressed against the first cam in a fully open front and rear sections of the door including full open,
The second contact surface,
The door hinge device having a hydraulic damping function, by having a curvature surface convex toward the second cam, is pressed against the second cam in the front and rear sections of the door including the closed state.

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