CN105257619B - Hydraulic cylinder - Google Patents
Hydraulic cylinder Download PDFInfo
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- CN105257619B CN105257619B CN201510781075.2A CN201510781075A CN105257619B CN 105257619 B CN105257619 B CN 105257619B CN 201510781075 A CN201510781075 A CN 201510781075A CN 105257619 B CN105257619 B CN 105257619B
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- 230000007246 mechanism Effects 0.000 claims abstract description 35
- 239000003921 oil Substances 0.000 claims description 34
- 239000010720 hydraulic oil Substances 0.000 claims description 5
- 230000000670 limiting effect Effects 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 230000002829 reductive effect Effects 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 3
- 230000036961 partial effect Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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Abstract
The invention relates to the field of hydraulic cylinders and discloses a hydraulic cylinder. The hydraulic cylinder is characterized in that the interior of a cylinder body (1) of the hydraulic cylinder is divided into a rodless cavity (4) and a rod cavity (5) through a piston (3) connected with a piston rod (2), the piston rod (2) is fixedly connected with a positioning piece (6) capable of moving axially together, and a locking mechanism (7) is arranged between the positioning piece (6) and the cylinder body (1), wherein after oil is fed into the rodless cavity (4) to enable the piston rod (2) to stretch out to drive the positioning piece (6) to move axially to a set position, a locking piece (8) of the locking mechanism (7) locks the positioning piece (6) and the cylinder body (1); when the rod cavity (5) is filled with oil to enable the piston rod (2) to retract, the locking piece (8) unlocks the positioning piece (6) and the cylinder body (1). The hydraulic cylinder can keep the piston rod positioned without continuously keeping pressure on the rodless cavity after the piston rod extends out of the preset position, so that the energy consumption is reduced, and the service life of a hydraulic system is prolonged.
Description
Technical Field
The invention relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder.
Background
As is known, a hydraulic cylinder of the related art includes a cylinder body, a piston, and a piston rod, wherein the piston divides an inner space of the cylinder body into a rod chamber and a rod-less chamber. The pneumatic cylinder is in the use, and single action is usually required to stay a period of time after accomplishing, for example rodless chamber oil feed, and the piston motion is stretched out the back completely with driving the piston rod, in order to guarantee to the lasting powerful support of the object on the piston rod, can last pressurize to rodless chamber usually to apply continuous hydraulic pressure to the piston, thereby let the piston rod stay motionless, like this, the piston rod could not contract in the cylinder body under the atress condition.
However, there is a certain drawback that the rodless chamber is required to continuously maintain pressure, which increases energy consumption to a certain extent, and in addition, the rodless chamber is required to continuously maintain pressure for a long time under some working conditions, and the long-time continuous pressure maintaining causes certain damage to the whole hydraulic system.
Disclosure of Invention
The invention aims to provide a hydraulic cylinder which can keep a piston rod positioned without continuously keeping pressure on a rodless cavity after the piston rod extends to a preset position, so that the energy consumption is reduced, and the service life of a hydraulic system is prolonged.
In order to achieve the purpose, the invention provides a hydraulic cylinder, the interior of a cylinder body of the hydraulic cylinder is divided into a rodless cavity and a rod cavity by a piston connected with a piston rod, the piston rod is fixedly connected with a positioning piece capable of moving axially together, and a locking mechanism is arranged between the positioning piece and the cylinder body, wherein after oil enters into the rod-less cavity, the piston rod extends out to drive the positioning piece to move axially to a set position, and a locking piece of the locking mechanism locks the positioning piece and the cylinder body; when the oil enters the rod cavity to enable the piston rod to retract, the locking piece unlocks the positioning piece and the cylinder body.
Through the technical proposal, because the piston rod is fixedly connected with the positioning piece, the positioning piece can axially move together with the piston rod, and a locking mechanism is arranged between the positioning piece and the cylinder body, thus, when the oil is fed into the rodless cavity to extend the piston rod to drive the positioning piece to axially move to a set position, the locking member of the locking mechanism is able to lock the positioning member and the cylinder body, thereby securing the positioning member relative to the cylinder body, and, at this time, because the positioning piece is fixedly connected with the piston rod, the piston rod is fixed to a set position, for example, the piston rod is fixedly positioned after being completely extended, so that the rodless cavity does not need to be continuously maintained in pressure through the locking piece, thereby reducing energy consumption and prolonging the service life of the hydraulic system, when the oil is fed into the rod cavity to retract the piston rod, the locking piece unlocks the positioning piece and the cylinder body, so that the piston rod can drive the positioning piece to axially return to the position.
Furthermore, the positioning element is formed as a sleeve, the sleeve is sleeved on the cylinder body, and the piston rod penetrates out of the bottom end of the sleeve and is fixedly connected with the bottom end of the sleeve.
Further, an axially extending guide groove is formed on an outer surface of the cylinder body to be able to guide the locking member to move axially along the guide groove.
Further, the locking mechanism is disposed between the side wall of the cylinder and the positioning member.
Further, the locking mechanism is configured to:
after the rodless cavity is filled with oil, the piston rod extends out to drive the positioning piece to axially move to a set position, and the locking piece automatically locks the positioning piece and the cylinder body;
when the rod cavity is filled with oil, the locking piece automatically unlocks the positioning piece and the cylinder body so that the piston rod can be retracted.
Further, the locking mechanism includes: the locking cavity is formed on the side wall of the rod cavity, and two ends of the locking cavity are respectively communicated with the rod cavity and the outside of the cylinder body in the radial direction; a plug body located within the locking cavity and capable of sliding radially under hydraulic oil pressure; the locking piece is formed into a locking rod, and the locking rod is arranged on the positioning piece in a radially sliding manner; when the rodless cavity is filled with oil, the plug body moves radially inwards, the positioning piece moves axially to a set position, the locking rod radially extends into the locking cavity to be aligned with the positioning piece and the cylinder body to be automatically locked, and when the rod cavity is filled with oil, the plug body moves radially outwards to push the locking rod out of the locking cavity to be aligned with the automatic unlocking of the positioning piece and the cylinder body.
Further, an end portion of the locking chamber facing the rod chamber is communicated with the rod chamber through an oil passage having a smaller bore diameter than the locking chamber, an end portion of the locking chamber facing the outside of the rod chamber is provided with a stopper having a through hole into which the locking rod can enter, and the plug body is formed with a flange section that can enter into the through hole to eject the locking rod out of the through hole.
Further, when the flange section of the plug body enters the through hole, an outer end face of the flange section, an outer end face of the stopper, and an outer surface of the cylinder body, which is in contact with the lock rod, are flush.
Further, be provided with the block that has inner space on the setting element, be provided with the spring in the inner space, the one end of locking lever passes the wall of setting element stretches into contradict in the inner space the spring, the other end supports under the unblock state and leans on the surface of cylinder body and make the spring is in compression state.
In addition, the number of the locking mechanisms is plural, and is evenly distributed along the circumferential direction of the cylinder.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a hydraulic cylinder according to an embodiment of the present invention, wherein the piston rod is not extended and the locking mechanism is not locked to the positioning member and the cylinder body;
FIG. 2 is an enlarged view of a portion of FIG. 1 to show the plug body moving radially inwardly;
FIG. 3 is a partial schematic view illustrating the locking member of the locking mechanism locking the positioning member and the cylinder body after the piston rod of the hydraulic cylinder of FIG. 1 is extended to a predetermined position;
FIG. 4 is a partial schematic view to show the locking member of the locking mechanism unlocking the locating member and cylinder;
figure 5 is an enlarged partial view of figure 4 to show the radially outward movement of the plug body.
Description of the reference numerals
1-cylinder block, 2-piston rod, 3-piston, 4-rodless cavity, 5-rod cavity, 6-positioning piece, 7-locking mechanism, 8-locking piece, 9-sleeve, 10-bottom end, 11-guide groove, 12-locking cavity, 13-plug body, 14-locking rod, 15-oil channel, 16-through hole, 17-limiting piece, 18-flange section, 19-outer end face of flange section, 20-outer end face of limiting piece, 21-outer surface, 22-inner space, 23-cap, 24-spring and 25-nut.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The hydraulic cylinder provided by the specific embodiment of the invention can keep the piston rod positioned without continuously keeping pressure on the rodless cavity after the piston rod extends out of the preset position, so that the energy consumption is reduced, and the service life of a hydraulic system is prolonged.
Specifically, as shown in fig. 1, the interior of a cylinder body 1 of the hydraulic cylinder is divided into a rodless cavity 4 and a rod cavity 5 by a piston 3 connected with a piston rod 2, wherein the piston rod 2 is fixedly connected with a positioning piece 6 capable of moving axially together, a locking mechanism 7 is arranged between the positioning piece 6 and the cylinder body 1, and after oil enters into the rodless cavity 4, the piston rod 2 extends out to drive the positioning piece 6 to move axially to a set position, a locking piece 8 of the locking mechanism 7 locks the positioning piece 6 and the cylinder body 1; when the rod chamber 5 is filled with oil to retract the piston rod 2, the locking member 8 unlocks the positioning member 6 and the cylinder body 1.
Through the technical scheme, as the piston rod 2 is fixedly connected with the positioning piece 6, the positioning piece 6 can axially move together with the piston rod 2, and the locking mechanism 7 is arranged between the positioning piece 6 and the cylinder body 1, thus, after the piston rod 2 extends out to drive the positioning piece 6 to axially move to the set position due to the oil inlet of the rodless cavity 4, for example, after the piston rod 2 completely extends out, the locking piece 8 of the locking mechanism 7 can lock the positioning piece 6 and the cylinder body 1, so that the positioning piece 6 is fixed relative to the cylinder body 1, at the moment, the piston rod 2 is also fixed to the set position due to the fixed connection of the positioning piece 6 and the piston rod 2, for example, the piston rod 2 is fixedly positioned after the piston rod 2 completely extends out, thus, the rodless cavity 4 is not required to be continuously positioned through the locking piece 8 of the locking mechanism 7, thereby reducing the energy consumption and prolonging the service life, the locking piece 8 unlocks the positioning piece 6 and the cylinder body 1, so that the piston rod 2 can drive the positioning piece 6 to axially return to the original position.
Thus, in the hydraulic cylinder of the present invention, the locking mechanism 7 and the locking member 8 may have various structures, for example, in one structure, the locking mechanism 7 may be a plurality of positioning holes formed in the positioning member 6 and a plurality of positioning holes axially spaced on the cylinder body 1, and the locking member 8 may be formed as a latch, so that when the piston rod 2 is extended to a set position, for example, fully extended, the positioning holes of the positioning member 6 are aligned with the positioning holes of the corresponding position on the cylinder body 1, and at this time, the latch is inserted through the positioning holes of the positioning member 6 and into the positioning holes of the cylinder body 1, so that the positioning member 6 and the cylinder body 1 can be locked, that is, the piston rod 2 is locked to the set position, and when the piston rod 2 needs to be returned, the latch is pulled.
Alternatively, the locking mechanism 7 is only a threaded hole formed in the retainer 6, and the locking member 8 is formed as a bolt having sufficient strength, and in this case, the piston rod 2 can be positioned by tightening the bolt so that the end surface of the bolt abuts against the outer surface of the cylinder block 1.
Alternatively, in other constructions, for example, fig. 1-5 show another form of construction for the locking mechanism 7 and the locking member 8, as will be described in more detail below.
Also, it should be understood that the positioning member 6 of the hydraulic cylinder of the present invention may have various structures, for example, the positioning member 6 may be a positioning plate fixed on the piston rod 2, and the positioning plate may be locked with the cylinder body 1 by the above-mentioned latch.
In another structure of the positioning member 6, in order to further improve the reliability and stability of positioning the piston rod 2, it is preferable that, as shown in fig. 1, the positioning member 6 is formed as a sleeve 9, the sleeve 9 is sleeved on the cylinder body 1, that is, the cylinder body 1 is accommodated in the sleeve 9, and the piston rod 2 is passed out from a bottom end 10 of the sleeve 9 and fixedly connected with the bottom end 10 of the sleeve 9, for example, an opening is formed on the bottom end 10 of the sleeve 9, the piston rod 2 is passed out from the opening, and a step on the piston rod 2 abuts against an inner surface of the bottom end 10 and is fixedly connected with the bottom end 10 through a nut 25. Of course, the piston rod 2 can also be welded to the bottom end 10 of the sleeve 9.
In addition, when the piston rod 2 carries the positioning member 6, such as the sleeve 9, to move axially, the locking member 8, such as the bolt described above or the locking rod 14 described below, may be retained on the positioning member 6, and thus may slide relative to the outer surface of the cylinder 1. Furthermore, in order to facilitate the sliding of the locking member 8, as shown in fig. 1, an axially extending guide groove 11 is formed on the outer surface of the cylinder 1 to guide the locking member 8 to move axially along the guide groove 11, for example, when the piston rod 2 drives the sleeve 9 to move axially, the end surface of the locking rod 14 of the latch moves axially in the guide groove 11 until encountering the positioning hole at the set position on the cylinder 1.
Further, in order to facilitate locking between the positioning member 6 such as the sleeve 9 and the cylinder 1, it is preferable that the locking mechanism 7 is provided between the side wall of the cylinder 1 and the positioning member 6 as shown in fig. 1, that is, the locking mechanism 7 and the locking member 8 are preferably locked on the side wall of the cylinder 1, at this time, as long as the strength of the locking member 8 can withstand the shearing force applied by the weight.
In addition, in the hydraulic cylinder of the present invention, as described above, the locking member 8 may be a bolt or a bolt, and in this case, the positioning member 6 and the cylinder block 1 may be manually locked by a human. However, in some cases, when manual locking is not performed manually, the lock mechanism 7 of the present invention is configured such that: after the rodless cavity 4 is filled with oil, the piston rod 2 extends out to drive the positioning piece 6 to axially move to a set position, and the locking piece 8 automatically locks the positioning piece 6 and the cylinder body 1; when the rod cavity 5 is filled with oil, the locking piece 8 automatically unlocks the positioning piece 6 and the cylinder body 1 so as to enable the piston rod 2 to be retracted. Thus, by this automatic locking, the locking and latching of the positioning member 6 and the cylinder 1 can be achieved more conveniently.
As described above, the locking mechanism 7 and the locking member 8 will be described in detail, and as shown in fig. 1, the locking mechanism 7 includes a locking cavity 12, a plug body 13 and the locking member 8, wherein the locking cavity 12 is formed on the side wall of the rod cavity 5, both ends of the locking cavity 12 are respectively communicated with the rod cavity 5 and the outside of the cylinder 1 in the radial direction, the plug body 13 is located in the locking cavity 12 and can slide radially under the pressure of hydraulic oil, for example, when the rod cavity 5 is drained, the hydraulic pressure applied to the plug body 13 is reduced, the plug body 13 moves radially inward, when the rod cavity 5 is filled with oil, the hydraulic pressure applied to the plug body 13 is increased, the plug body 13 moves radially outward, and the locking member 8 is formed as the rod body 14, that is, the locking rod 14, and the locking member 14 can be arranged on the positioning member 6 in a radially sliding manner; when the rodless cavity 4 is filled with oil, the plug body 13 moves radially inwards, and after the positioning element 6 moves axially to a set position, as shown in fig. 3, the locking rod 14 radially extends into the locking cavity 12 to automatically lock the positioning element 6 and the cylinder body 1, and when the rod cavity 5 is filled with oil, the plug body 13 moves radially outwards under the action of hydraulic pressure to eject the locking rod 14 out of the locking cavity 12, as shown in fig. 4, to automatically unlock the positioning element 6 and the cylinder body 1. In this way, in this preferred form of construction, automatic locking and unlocking can be achieved using the hydraulic pressure of the hydraulic system itself, thereby significantly improving operability and stability of locking by the stability of the hydraulic pressure.
Further, as shown in fig. 1 and 2, the end of the lock chamber 12 facing the rod chamber 5 communicates with the rod chamber 5 through an oil passage 15 having a smaller bore diameter than the lock chamber 12, so that the plug body 13 can move radially when the rod chamber 5 is filled with oil or oil, of course, as shown in fig. 2, the outer circumferential surface of the plug body 13 is sealed with the inner circumferential surface of the locking cavity 12, the end of the locking cavity 12 facing the outside of the rod cavity 5 is provided with a stopper 17 having a through hole 16, the stopper 17 can prevent the plug body 13 from moving radially outward out of the locking cavity 12 under the action of hydraulic pressure, the stopper 17 can be formed as a stopper nut, the locking rod 14 can enter the through hole 16 to lock the positioning member 6 and the cylinder body 1, and the plug body 13 is formed with a flange section 18, the flange section 18 can enter the through bore 16 to eject the locking bar 14 from the through bore 16 to unlock the keeper 6 and cylinder 1.
Further, as shown in fig. 5, in order to facilitate the axial movement of the positioning member 6 such as the sleeve 9, it is preferable that when the flange section 18 of the plug body 13 enters into the through hole 16 to eject the locking rod 14, the outer end surface 19 of the flange section 18, the outer end surface 20 of the stopper 17, and the outer surface 21 of the cylinder block 1 which is in contact with the locking rod 14 are flush. With the guide groove 11 described above, the outer end face 19 of the flange section 18, the outer end face 20 of the stop 17 and the groove bottom face of the guide groove 11 are flush.
Of course, the outer end surface 20 of the stopper 17 may be lower than the outer surface 21 of the cylinder 1 contacting the locking rod 14, or lower than the groove bottom surface of the guide groove 11, and at this time, the outer end surface 19 of the flange section 18 needs to push the end surface of the locking rod 14 out to be higher than or flush with the outer surface 21 of the cylinder 1 contacting the locking rod 14, or the groove bottom surface of the guide groove 11.
Further, as described above, the lock lever 14 is provided on the positioning member 6 so as to be radially slidable, and specifically, in one configuration, as shown in fig. 1, 3 and 4, a cap 23 having an internal space 22 is provided on the positioning member 6, for example, the cap 23 is provided on the outer surface of the sleeve 9, a spring 24 is provided in the internal space 22 of the cap 23, one end of the lock lever 14 extends into the internal space 22 through the wall of the positioning member 6 to abut against the spring 24, for example, a compression spring, and the other end abuts against the outer surface of the cylinder 1 in the unlocked state (in the case of the guide groove 11, the other end abuts against the groove bottom surface of the guide groove 11) and the spring 24 is placed in the compressed state.
Thus, oil is fed into the rodless cavity 4, when oil is discharged from the rod cavity 5, the piston rod 2 drives the sleeve 9 to move outwards, that is, to move towards the right side of fig. 1, at this time, the plug body 13 moves radially inwards, the locking rod 14 is under the action of the pressure spring, the other end of the locking rod 14 abuts against the bottom surface of the guide groove 11, when the through hole 16 of the limiting part 17 is encountered, the locking rod 14 enters the through hole 16 under the action of the pressure spring, so that the sleeve 9 and the cylinder body 1 are locked, that is, the piston rod 2 is locked and positioned to a required position, as shown in fig. 3. When the rod cavity 5 is filled with oil and the rodless cavity 4 discharges oil, at the moment, the piston rod 2 does not move and return immediately due to the fact that the pressure of hydraulic oil is small, when the hydraulic oil continues to be filled with oil, the hydraulic pressure is increased to overcome the force of the pressure spring, the plug body 13 is forced to move radially outwards, the flange section 18 enters the through hole 16 to eject the locking rod 14 out of the through hole 16, and at the moment, the piston rod 2 and the sleeve 9 move axially and return under the driving of the piston 3 as shown in fig. 4.
In addition, in the hydraulic cylinder of the present invention, the number of the locking mechanisms 7 is plural, for example, 4, and is uniformly distributed along the circumferential direction of the cylinder block 1. Thereby providing a stable, reliable and uniform locking support in the circumferential direction.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (8)
1. A hydraulic cylinder, the interior of a cylinder body (1) of the hydraulic cylinder is divided into a rodless cavity (4) and a rod cavity (5) by a piston (3) connected with a piston rod (2),
the piston rod (2) is fixedly connected with a positioning piece (6) which can move axially together, a locking mechanism (7) is arranged between the positioning piece (6) and the cylinder body (1), wherein,
after the rodless cavity (4) is filled with oil, the piston rod (2) extends out to drive the positioning piece (6) to axially move to a set position, and the locking piece (8) of the locking mechanism (7) locks the positioning piece (6) and the cylinder body (1);
when the rod cavity (5) is filled with oil to enable the piston rod (2) to be retracted, the locking piece (8) unlocks the positioning piece (6) and the cylinder body (1), the positioning piece (6) is formed into a sleeve (9), the sleeve (9) is sleeved on the cylinder body (1), and the piston rod (2) penetrates out of the bottom end (10) of the sleeve (9) and is fixedly connected with the bottom end (10) of the sleeve (9);
the locking mechanism (7) comprises:
a locking cavity (12) formed on the side wall of the rod cavity (5), wherein two ends of the locking cavity (12) are respectively communicated with the rod cavity (5) and the outside of the cylinder body (1) in the radial direction;
a plug body (13), said plug body (13) being located within said locking chamber (12) and being radially slidable under hydraulic oil pressure;
the locking element (8), the locking element (8) being formed as a locking lever (14), the locking lever (14) being arranged on the positioning element (6) in a radially slidable manner; wherein,
when the rodless cavity (4) is filled with oil, the plug body (13) moves inwards in the radial direction, and after the positioning piece (6) moves to a set position in the axial direction, the locking rod (14) radially extends into the locking cavity (12) to automatically lock the positioning piece (6) and the cylinder body (1),
when the rod cavity (5) is filled with oil, the plug body (13) moves outwards in the radial direction, so that the locking rod (14) is ejected out of the locking cavity (12), and the positioning piece (6) and the cylinder body (1) are unlocked automatically.
2. Hydraulic cylinder according to claim 1, characterized in that the cylinder body (1) has an axially extending guide groove (11) formed on its outer surface to enable guiding the locking element (8) for axial movement along the guide groove (11).
3. Hydraulic cylinder according to any one of claims 1-2, characterized in that the locking mechanism (7) is arranged between the side wall of the cylinder body (1) and the positioning element (6).
4. Hydraulic cylinder according to claim 1, characterized in that the locking mechanism (7) is configured to:
after the rodless cavity (4) is filled with oil, the piston rod (2) extends out to drive the positioning piece (6) to axially move to a set position, and the locking piece (8) automatically locks the positioning piece (6) and the cylinder body (1);
when having pole chamber (5) oil feed, locking piece (8) are right locating piece (6) with cylinder body (1) automatic unlocking, so that piston rod (2) can be withdrawed.
5. Hydraulic cylinder according to claim 4, characterized in that the end of the locking chamber (12) facing the rod chamber (5) communicates with the rod chamber (5) via an oil channel (15) having a smaller bore diameter than the locking chamber (12),
the end part of the locking cavity (12) facing the outside of the rod cavity (5) is provided with a limiting piece (17) with a through hole (16),
the locking rod (14) is capable of entering into the through hole (16), and the plug body (13) is formed with a flange section (18), the flange section (18) being capable of entering into the through hole (16) to eject the locking rod (14) from the through hole (16).
6. Hydraulic cylinder according to claim 5, characterized in that when the flange section (18) of the plug body (13) enters into the through hole (16), the outer end face (19) of the flange section (18), the outer end face (20) of the stop (17) and the outer surface (21) of the cylinder body (1) in contact with the locking rod (14) are flush.
7. Hydraulic cylinder according to claim 4, characterized in that a cap (23) with an inner space (22) is arranged on the positioning element (6), a spring (24) is arranged in the inner space (22), one end of the locking rod (14) extends through the wall of the positioning element (6) into the inner space (22) against the spring (24), and the other end abuts against the outer surface of the cylinder body in the unlocked state and keeps the spring (24) in the compressed state.
8. Hydraulic cylinder according to claim 1, characterized in that the locking mechanism (7) is plural in number and is distributed evenly in the circumferential direction of the cylinder block (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510781075.2A CN105257619B (en) | 2015-11-13 | 2015-11-13 | Hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510781075.2A CN105257619B (en) | 2015-11-13 | 2015-11-13 | Hydraulic cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105257619A CN105257619A (en) | 2016-01-20 |
| CN105257619B true CN105257619B (en) | 2017-12-05 |
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| CN201510781075.2A Active CN105257619B (en) | 2015-11-13 | 2015-11-13 | Hydraulic cylinder |
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| CN110439878B (en) * | 2019-06-27 | 2022-10-18 | 北京安泰隆机电技术有限公司 | Hydraulic bolt mechanism |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3814003A1 (en) * | 1988-03-26 | 1989-10-12 | Colt Int Holdings | PRESSURE-OPERATING LIFT CYLINDER FOR PREFERRED VENTILATION DEVICES |
| CN204003786U (en) * | 2014-08-08 | 2014-12-10 | 长沙中联消防机械有限公司 | Oil cylinder, telescopic mechanism and engineering machinery or vehicle |
| CN104454779B (en) * | 2014-10-13 | 2017-02-15 | 长沙迪普机械科技有限公司 | Linear actuator with locking mechanism |
| CN104454780A (en) * | 2014-10-23 | 2015-03-25 | 长沙中联重科环卫机械有限公司 | Oil cylinder with mechanical locking function and hydraulic system |
| CN104454781B (en) * | 2014-11-04 | 2017-05-24 | 长沙中联消防机械有限公司 | Locking amplitude-variable oil cylinder, oil cylinder control system, climbing fire truck or fire-fighting operation vehicle |
| CN205101316U (en) * | 2015-11-13 | 2016-03-23 | 湖南特力液压有限公司 | Hydraulic cylinder |
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| CN105257619A (en) | 2016-01-20 |
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