A drive mechanism for driving a mobile element in a radial reciprocating motion on a mounting

Abstract

The application discloses a driving mechanism for driving a moving part to make radial reciprocating motion on a mounting base, comprising a driving part and a shift fork, wherein the driving part is provided with a connecting part; the shift fork comprises a first shift fork arm and a second shift fork arm; the moving part is provided with a first clamping groove, a first rotating shaft is rotatably installed in the first clamping groove, the end of the first shift fork arm is recessed to form a first clamping recess, the first rotating shaft is provided with a first clamping part, the first shift fork arm is inserted into the first clamping groove, and the first clamping part is arranged in the first clamping recess; the connecting part is provided with a second clamping groove, a second rotating shaft is rotatably installed in the second clamping groove, the end of the second shift fork arm is recessed to form a second clamping recess, the second rotating shaft is provided with a second clamping part, the second shift fork arm is inserted into the second clamping groove, and the second clamping part is arranged in the second clamping recess. The driving mechanism has the advantages of simple structure, stable connection and reliable use.

Description

Technical Field

[0001] This invention relates to a drive mechanism, and more particularly to a drive mechanism that drives a moving part to perform radial reciprocating motion on a mounting base. Background Technology

[0002] In the field of mechanics, there exists a drive mechanism that drives a moving part to perform radial reciprocating motion on a mounting base. This type of mechanism typically consists of a drive component and a moving component, which are connected by a shift fork. Under the action of the shift fork, the axial motion of the drive component along the mounting base is converted into radial reciprocating motion of the moving part on the mounting base. The drive component is provided with a toggle connection part that is distributed in accordance with the shift fork. The shift fork has two shift fork arms arranged at an included angle. One shift fork arm is connected to the moving part, and the other shift fork arm is connected to the toggle connection part. The conventional way for the shift fork arm to cooperate with the moving part and the toggle connection part is a direct fit between a spherical surface and a keyway. This type of contact is a line contact, which is not stable enough. The toggle part is prone to uneven stress, resulting in stress concentration and easy breakage. Moreover, in the continuous reciprocating motion, the contact parts will experience significant wear, which will have a certain impact on the service life of the mechanism. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a driving mechanism that drives a moving part to perform radial reciprocating motion on a mounting base, which has a simple structure, stable connection and good service life.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: A drive mechanism for driving a moving component to perform radial reciprocating motion on a mounting base includes a drive component capable of reciprocating up and down along the axial direction of the mounting base and a shift fork rotatably disposed relative to the mounting base. The shift fork rotates in a plane defined by the radial direction of the moving component corresponding to the shift fork and the axial direction of the mounting base. The drive component is provided with connecting portions that are distributed in accordance with the shift fork. The shift fork includes a first shift fork arm and a second shift fork arm disposed at an included angle to each other. The first shift fork arm is connected to the moving component, and the second shift fork arm is connected to the connecting portions. The movable component is provided with a first slot at the mounting position corresponding to the first shift fork arm, into which the first shift fork arm extends for mounting. The first shift fork arm and the first slot are in clearance fit. A first rotating shaft is rotatably mounted in the first slot. A first clamping groove is recessed at the end of the first shift fork arm. The first rotating shaft has a first clamping part that mates with the first clamping groove. The first shift fork arm extends into the first slot and the first clamping part is located in the first clamping groove. The two inner end faces of the first clamping groove are first clamping end faces, which are parallel flat end faces. The two end faces of the first clamping part are recessed on opposite end faces. The bottom end face of the first recess is a flat end face that mates with the first clamping end face. One of the first clamping end faces is in contact with the bottom end face of one of the first recesses. The connecting part is provided with a second slot at the mounting position of the second shift fork arm for the second shift fork arm to extend into and be installed. The second shift fork arm and the second slot are in clearance fit. A second rotating shaft is rotatably mounted in the second slot. The end of the second shift fork arm is recessed with a second clamping groove. The second rotating shaft has a second clamping part that mates with the second clamping groove. The second shift fork arm extends into the second slot and the second clamping part is located in the second clamping groove. The two inner end faces of the second clamping groove are opposite to each other and are parallel flat end faces. The two end faces of the second clamping part are respectively recessed with second recesses. The bottom end face of the second recess is a flat end face that mates with the second clamping end face. One of the second clamping end faces is in contact with the bottom end face of one of the second recesses.

[0005] The mounting base includes a disc surface on which the movable component is mounted and a support portion for supporting the disc surface. The support portion is provided with a support rod for the rotatable mounting of the shift fork, and the shift fork is rotatably mounted on the corresponding support rod. This structure achieves stable rotatable mounting of the shift fork on the mounting base.

[0006] Compared with the prior art, the advantages of the present invention are as follows: the shift fork is connected to the driving component and the moving component respectively through a rotating shaft. The flat end face in the clamping groove cooperates with the flat end face of the recessed part on the rotating shaft to form a surface contact, which makes the contact more stable. Moreover, during the whole movement, due to the large contact area of ​​the surface contact, the wear between them will be greatly reduced. At the same time, it can effectively improve the stress concentration problem of the shift fork arm, greatly reduce the risk of the shift fork arm breaking, and thus effectively extend the service life of the entire mechanism. Attached Figure Description

[0007] Figure 1 This is a three-dimensional structural diagram of the present invention with the mounting base removed; Figure 2 for Figure 1 A schematic diagram of the decomposed structure; Figure 3 This is a partial cross-sectional structural schematic diagram of the present invention; Figure 4 for Figure 1 A cross-sectional structural diagram. Detailed Implementation

[0008] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0009] As shown in the figure, a drive mechanism for driving a moving part to perform radial reciprocating motion on a mounting base includes a drive member 3 capable of reciprocating up and down along the axial direction of the mounting base 2 and a shift fork 4 rotatably disposed relative to the mounting base 2. The shift fork 4 rotates in a plane defined by the radial direction of the moving part 1 corresponding to the shift fork 4 and the axial direction of the mounting base 2. The drive member 3 is provided with a connecting part 31 that is distributed in the same direction as the shift fork 4. The shift fork 4 includes a first shift fork arm 41 and a second shift fork arm 42 disposed at an included angle to each other. The first shift fork arm 41 is connected to the moving part 1, and the second shift fork arm 42 is connected to the connecting part 31. The movable part 1 has a first slot 11 at the mounting position corresponding to the first shift fork arm 41, into which the first shift fork arm 41 extends for mounting. The first shift fork arm 41 and the first slot 11 are clearance-fitted. A first rotating shaft 5 is rotatably mounted in the first slot 11. A first clamping groove 411 is recessed at the end of the first shift fork arm 41. The first rotating shaft 5 has a first clamping part 51 that mates with the first clamping groove 411. The first shift fork arm 41 extends into the first slot 11. Furthermore, the first clamping part 51 is disposed in the first clamping groove 411, and the two inner end faces 412 opposite to each other of the first clamping groove 411 are the first clamping end faces. The two first clamping end faces are parallel flat end faces. The two opposite end faces of the first clamping part 51 are respectively recessed with the first recessed part 511. The bottom end face 512 of the first recessed part 511 is a flat end face that matches the first clamping end face. One first clamping end face fits against the bottom end face 512 of one first recessed part 511. A second slot 311 is provided on the connecting part 31 at the mounting position corresponding to the second shift fork arm 42, allowing the second shift fork arm 42 to extend into and be installed. The second shift fork arm 42 and the second slot 311 are in clearance fit. A second rotating shaft 6 is rotatably mounted in the second slot 311. A second clamping groove 421 is recessed at the end of the second shift fork arm 42. The second rotating shaft 6 has a second clamping part 61 that mates with the second clamping groove 421. The second shift fork arm 42 extends into and is mounted in the second slot 31. The second clamping part 61 is disposed in the second clamping groove 421. The two inner end faces 422 opposite to each other of the second clamping groove 421 are the second clamping end faces. The two second clamping end faces are parallel flat end faces. The two opposite end faces of the second clamping part 61 are respectively recessed with the second recessed part 611. The bottom end face 612 of the second recessed part 611 is a flat end face that matches the second clamping end face. One second clamping end face fits into the bottom end face 612 of one second recessed part 611.

[0010] In this specific embodiment, the mounting base 2 includes a disc surface 21 with a movable component 1 and a support portion 22 for supporting the disc surface 21. The support portion 22 is provided with a support rod 7 for the rotatable mounting of the shift fork 4, and the shift fork 4 is rotatably mounted on the corresponding support rod 7. The above structure enables the stable rotatable mounting of the shift fork 4 on the mounting base 2.

Claims

1. A drive mechanism for driving a movable component to perform radial reciprocating motion on a mounting base, comprising a drive component capable of reciprocating up and down along the axial direction of the mounting base and a shift fork rotatably disposed relative to the mounting base, the shift fork rotating in a plane defined by the radial direction of the movable component corresponding to the shift fork and the axial direction of the mounting base, the drive component having a connecting portion distributed in accordance with the shift fork; the shift fork comprising a first shift fork arm and a second shift fork arm disposed at an included angle, the first shift fork arm being connected to the movable component, and the second shift fork arm being connected to the connecting portion. Its features The movable component is provided with a first slot at the mounting position corresponding to the first shift fork arm, into which the first shift fork arm extends for mounting. The first shift fork arm and the first slot are in clearance fit. A first rotating shaft is rotatably mounted in the first slot. A first clamping groove is recessed at the end of the first shift fork arm. The first rotating shaft has a first clamping part that mates with the first clamping groove. The first shift fork arm extends into the first slot and the first clamping part is located in the first clamping groove. The two inner end faces of the first clamping groove are first clamping end faces, which are parallel flat end faces. The two end faces of the first clamping part are recessed on opposite end faces. The bottom end face of the first recess is a flat end face that mates with the first clamping end face. One of the first clamping end faces is in contact with the bottom end face of one of the first recesses. The connecting part is provided with a second slot at the mounting position of the second shift fork arm for the second shift fork arm to extend into and be installed. The second shift fork arm and the second slot are in clearance fit. A second rotating shaft is rotatably mounted in the second slot. The end of the second shift fork arm is recessed with a second clamping groove. The second rotating shaft has a second clamping part that mates with the second clamping groove. The second shift fork arm extends into the second slot and the second clamping part is located in the second clamping groove. The two inner end faces of the second clamping groove are opposite to each other and are parallel flat end faces. The two end faces of the second clamping part are respectively recessed with second recesses. The bottom end face of the second recess is a flat end face that mates with the second clamping end face. One of the second clamping end faces is in contact with the bottom end face of one of the second recesses.

2. The drive mechanism for driving a moving member to perform radial reciprocating motion on a mounting base as described in claim 1, characterized in that... The mounting base includes a disc surface on which the movable component is provided and a support portion for supporting the disc surface. The support portion is provided with a support rod for rotatably mounting the shift fork, and the shift fork is rotatably mounted on the corresponding support rod.

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