CN111594595A

CN111594595A - Reciprocating mechanism and method for converting low-speed rotary motion into high-frequency swing

Info

Publication number: CN111594595A
Application number: CN202010437279.5A
Authority: CN
Inventors: 陈泽雄; 冯水松
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2020-08-28

Abstract

The invention discloses a reciprocating mechanism, and also discloses a method for converting low-speed rotation motion into high-frequency oscillation, wherein the reciprocating mechanism comprises a cam, a motor and an oscillating piece, the cam comprises an upper cam and a lower cam which are arranged at intervals, the low-speed rotation is converted into the high-frequency reciprocating oscillation of the oscillating piece by using double cams, an elastic reset structure required by a common eccentric wheel mechanism is avoided, the structure is simpler and more compact, and the upper cam and the lower cam are always kept in butt joint with the oscillating piece in the working process, so that the equipment runs more stably, and the oscillation frequency is adjusted by setting the number of sections of a non-circular curve profile. The invention is used in the technical field of mechanical transmission.

Description

Reciprocating mechanism and method for converting low-speed rotary motion into high-frequency swing

Technical Field

The invention relates to the technical field of mechanical transmission, in particular to a method for converting low-speed rotary motion into high-frequency swing by a reciprocating mechanism.

Background

In products with mechanical motion, the mechanical motion of oscillating back and forth at a certain angle is mostly realized by a link mechanism. However, the frequency of the oscillation in this way is not high and there is an inertial impact at the dead point position, which can cause the apparatus to vibrate violently when moving rapidly. Except for a connecting rod mechanism, an eccentric wheel mode is adopted, but the eccentric wheel mode generally needs to be matched with a structure capable of enabling a workpiece to reset, such as a spring, a magnet and the like, and on some occasions with vibration working conditions, the stability of elastic reset structures such as the spring, the magnet and the like in equipment can be greatly influenced under the condition of severe external vibration, and finally the working quality of the equipment can be influenced.

Disclosure of Invention

The invention aims to provide a reciprocating mechanism.

The invention also provides a method for converting low-speed rotary motion into high-frequency swing.

The technical scheme adopted by the invention is as follows:

the reciprocating mechanism comprises a cam, a motor and a swinging piece, wherein the cam comprises an upper cam and a lower cam which are arranged at intervals, the upper cam and the lower cam are connected through a cam bracket, the outer contours of the upper cam and the lower cam comprise n sections of non-circular curve profiles which are arranged at equal intervals, the motor is arranged at the bottom of the cam bracket, the motor drives the upper cam and the lower cam to rotate, the swinging piece is provided with a through hole, a rotating shaft penetrates through the through hole, the swinging piece rotates around the rotating shaft, the upper end of the swinging piece abuts against the outer contour of the upper cam through a meshing piece, and the lower end of the swinging piece abuts against the outer contour of the lower cam through the meshing piece.

The invention has the beneficial effects that: the reciprocating mechanism comprises a cam, a motor and a swinging piece, wherein the cam comprises an upper cam and a lower cam which are arranged at intervals, low-speed rotation is changed into high-frequency reciprocating swinging of the swinging piece by utilizing the double cams, an elastic reset structure required by a common eccentric wheel mechanism is avoided, the structure is simpler and more compact, the upper cam and the lower cam are always kept in butt joint with the swinging piece in the working process, therefore, the equipment runs more stably, and the vibration frequency is adjusted by setting the number of sections of a non-circular curve profile.

Further as an improvement of the technical scheme of the invention, the upper cam and the lower cam have the same shape and size.

Further as an improvement of the technical scheme of the invention, the upper cam and the lower cam are installed around the rotation center in a staggered mode at an angle of 360 degrees/n.

As a further improvement of the technical solution of the present invention, the engaging member 500 is a ball bearing, a bull's eye bearing, or a cambered bearing.

According to the method for converting the low-speed rotation motion into the high-frequency swing motion of the embodiment of the second aspect of the invention, the motor is electrified by using the reciprocating mechanism, the upper cam and the lower cam rotate synchronously, the outer contour of the upper cam drives the engaging piece abutted with the upper cam to rotate along the outer contour of the upper cam, the outer contour of the lower cam drives the engaging piece abutted with the lower cam to rotate along the outer contour of the lower cam, so that the swinging piece is driven to swing back and forth around the rotating shaft, and the low-speed rotation motion of the cam is converted into the high-frequency swing motion of the swinging piece.

As a further improvement of the technical scheme of the invention, the swinging frequency of the swinging piece is increased or reduced by adjusting the rotating speed of the motor.

Further, as an improvement of the present invention, the swing angle of the swing member is changed by changing the outer contour curve of the upper cam and the lower cam.

Drawings

The invention is further described below with reference to the accompanying drawings and examples;

FIG. 1 is an isometric view of an embodiment of the present invention;

FIG. 2 is a front view of an embodiment of the present invention;

fig. 3 is a top view of an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1 to 3, the reciprocating mechanism includes a cam 100, a motor 200, and a swinging member 300. The cam 100 comprises an upper cam 110 and a lower cam 120 which are arranged at intervals, the upper cam 110 and the lower cam 120 are connected through a cam bracket 130, and the outer contours of the upper cam 110 and the lower cam 120 comprise 4 equally-arranged non-circular curve contours; the motor 200 is installed at the bottom of the cam bracket 130, and the motor 200 drives the upper cam 110 and the lower cam 120 to rotate; the swing member 300 is provided with a through hole, a rotating shaft 400 passes through the through hole to rotate the swing member 300 around the rotating shaft 400, and the upper and lower ends of the swing member 300 are respectively abutted to the outer contours of the upper cam 110 and the lower cam 120 through the engaging member 500.

Wherein, the upper cam 110 and the lower cam 120 have the same shape and size, and the balancing effect is better when the upper cam 110 and the lower cam 120 rotate because the centers of mass of the upper cam 110 and the lower cam 120 are on the center of rotation. In this embodiment, the upper cam 110 and the lower cam 120 are installed around the rotation center in a staggered manner at an angle of 90 degrees, and the upper cam 110 and the lower cam 120 are installed in a staggered manner, so that an elastic reset structure required by a common eccentric mechanism is avoided, the structure is simpler and more compact, parts such as springs, magnets and the like commonly used in a traditional reciprocating mechanism are reduced, the installation is simple, the operation is stable, the failure rate is low, and the service life is long.

It will be appreciated that the engagement member 500 is a ball or eye or arc bearing.

In a method for converting a low-speed rotation motion into a high-frequency swing motion, the motor 200 is powered on by using the reciprocating mechanism, the upper cam 110 and the lower cam 120 rotate synchronously, and the outer profiles of the upper cam 110 and the lower cam 120 drive the engaging member 500 abutted against the upper cam 110 and the lower cam 120 to rotate along the outer profiles, so that the swing member 300 is driven to swing back and forth around the rotating shaft 400. In actual operation, the oscillating frequency of the oscillating member 300 is increased or decreased by adjusting the rotation speed of the motor 200. Meanwhile, the swing angle of the swing member 300 can be changed by changing the outer profile curves of the upper cam 110 and the lower cam 120.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A reciprocating mechanism, comprising:

the cam comprises an upper cam and a lower cam which are arranged at intervals, the upper cam and the lower cam are connected through a cam bracket, and the outer profiles of the upper cam and the lower cam comprise n sections of non-circular curve profiles which are arranged in an equal division manner;

the motor is arranged at the bottom of the cam bracket and drives the upper cam and the lower cam to rotate;

the oscillating piece is provided with a through hole, a rotating shaft penetrates through the through hole, the oscillating piece rotates around the rotating shaft, the upper end of the oscillating piece is abutted to the outer contour of the upper cam through the meshing piece, and the lower end of the oscillating piece is abutted to the outer contour of the lower cam through the meshing piece.

2. The reciprocating mechanism of claim 1, wherein: the upper cam and the lower cam are identical in shape and size.

3. The reciprocating mechanism of claim 2, wherein: the upper cam and the lower cam are installed around a rotation center in a staggered manner at an angle of 360 DEG/n.

4. The reciprocating mechanism of claim 1, wherein: the meshing piece is a ball bearing or a bull eye bearing or a cambered surface bearing.

5. The method for converting low-speed rotation into high-frequency oscillation by using the reciprocating mechanism as claimed in claim 1, wherein the motor is energized, the upper cam and the lower cam rotate synchronously, the outer contour of the upper cam drives the engaging member abutted against the upper cam to rotate along the outer contour of the upper cam, and the outer contour of the lower cam drives the engaging member abutted against the lower cam to rotate along the outer contour of the lower cam, so that the oscillating member is driven to oscillate back and forth around the rotating shaft.

6. Method for converting a low speed rotational movement into a high frequency oscillation according to claim 5, characterized in that: the oscillating frequency of the oscillating member is increased or decreased by adjusting the rotational speed of the motor.

7. Method for converting a low speed rotational movement into a high frequency oscillation according to claim 5, characterized in that: the swing angle of the swing member is changed by changing the outer contour curves of the upper cam and the lower cam.