Push-pull mechanism
By designing a push-pull mechanism for cutting semiconductor wafer wires, using a motor to drive the screw rotation and the conversion movement of the ball nut pair, combined with the horizontal plate, slider and guard plate structure to disperse the reaction force, the problems of increased resistance and shortened effective stroke of the ball nut pair in the prior art are solved, and smoother movement and faster debris cleaning are achieved.
Patent Information
- Application Number
- CN202510376258.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2025-05-06
AI Technical Summary
During the cutting process of semiconductor wafer wire, the push and pull mechanism increases the resistance of the ball nut pair due to the reaction force, which affects its movement smoothness. Increasing the length of the ball nut pair to disperse the resistance will shorten its effective stroke and increase the debris cleaning time.
A push and pull mechanism is designed. The ball nut pair converts the rotational movement into a linear movement of the push and pull plate, and uses the horizontal plate, slider and guard plate structure to disperse the reaction force to prevent it from acting on the contact parts of the ball nut pair and the screw, and achieves convenient disassembly through the positioning screw and the L-shaped plate structure.
It effectively disperses the reaction force, improves the smooth movement of the ball nut pair, increases its effective stroke, and shortens the debris cleaning time, while reducing the cost of replacement of parts.
Smart Images
Figure CN119928096A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a push-pull mechanism, belonging to the technical field of semiconductor wafer wire cutting. Background Art
[0002] Semiconductor wafer wire sawing is a key step in the semiconductor manufacturing process, which is used to cut large-sized single-crystalline silicon wafers into multiple independent small chips. During the semiconductor wafer wire cutting process, a push-pull mechanism is required to adjust the position of the semiconductor wafer. The motor drives the lead screw to rotate, so that the ball nut pair on the lead screw drives the semiconductor wafer fixture to move through the push-pull plate. During the movement of the push-pull plate driven by the ball nut pair, the semiconductor wafer fixture will generate a reaction force on the push-pull plate. Because the end of the push-pull plate away from the ball nut pair is in a supported state, the ball nut pair is subjected to an upward or downward force under the action of the reaction force. At this time, the resistance between the ball nut pair and the lead screw increases. In order to reduce the influence of the reaction force on the smoothness of the movement of the ball nut pair, it is necessary to increase the length of the ball nut pair, that is, the contact range between the ball nut pair and the lead screw is increased, so that the upward or downward resistance of the ball nut pair is dispersed in multiple places of the lead screw. Increasing the length of the ball nut pair will affect the effective stroke of the ball nut pair, that is, when the length of the lead screw is fixed, the effective stroke for pushing the semiconductor wafer to move is shortened. At the same time, after the contact range between the ball nut pair and the lead screw is increased, the time spent on cleaning the debris between the ball nut pair and the lead screw is increased. Summary of the invention
[0003] In view of the deficiencies in the prior art, the present invention aims to provide a push-pull mechanism to solve the problems raised in the above background technology.
[0004] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a push-pull mechanism comprises a support, one side of the support is equipped with a protective cover, one side of the protective cover is equipped with a motor, the output shaft of the motor extends into the protective cover, the output shaft of the motor is connected to a screw rod through a coupling, the end of the screw rod close to the coupling is connected to a bearing seat through a second bearing, the bearing seat is connected to the protective cover through a screw, a ball nut pair is sleeved on the screw rod, one side of the ball nut pair is equipped with a movable seat, a push-pull plate is installed on the outer surface of the movable seat, the push-pull plate is arranged parallel to the screw rod, two protrusions are installed on the end of the push-pull plate away from the movable seat, a cross plate is provided on the side of the movable seat away from the push-pull rod, one end of the cross plate is connected to the bearing seat through a plurality of positioning screws, and a strip opening arranged along the length direction of the cross plate is opened on the side of the cross plate facing the screw rod, a slider is slidably installed in the strip opening, and the slider is connected and fixed to the movable seat.
[0005] Specifically, a plurality of small holes are formed at one end of the transverse plate close to the bearing seat, and positioning screws are inserted into the small holes. Two symmetrically arranged first planes are formed on the annular side surface of the bearing seat, and a plurality of threaded blind holes matching the small holes are formed on the first plane away from the push-pull plate. One end of the positioning screw passes through the small hole and is threadedly connected in the threaded blind hole.
[0006] Specifically, a connecting plate is provided on the side of the small hole away from the threaded blind hole, and a plurality of through holes aligned with the small hole are opened on one side of the connecting plate, and the positioning screw passes through the channel formed by the through holes and the small hole, and a vertical plate is connected and fixed to one end of the connecting plate, and the vertical plate is inserted in the side of the strip opening close to the bearing seat, and an upper guard plate is installed at the upper position of one side of the vertical plate, and the upper guard plate fits in the top of the strip opening, and a lower guard plate is provided on the lower side of the upper guard plate, and the lower guard plate is arranged parallel to the upper guard plate, and one end of the lower guard plate is connected and fixed to the vertical plate, and the lower guard plate fits in the bottom of the strip opening, and a slider is provided between the lower guard plate and the upper guard plate, and the slider is in sliding contact with the lower guard plate and the upper guard plate.
[0007] Specifically, the vertical plate and the connecting plate are an integrally formed structure, the vertical plate and the connecting plate are arranged perpendicular to each other, the upper guard plate, the lower guard plate and the vertical plate are an integrally formed structure, and the upper guard plate, the lower guard plate and the vertical plate are arranged perpendicular to each other.
[0008] Specifically, an L-shaped plate is provided on the side of the through hole away from the small hole, one end of the L-shaped plate is connected and fixed to the connecting plate, a plurality of circular holes are evenly opened on the side of the L-shaped plate facing the connecting plate, the circular holes are aligned with the through hole, and there is a gap between the circular hole and the through hole for inserting a hacksaw blade, and one end of the positioning screw passes through the circular hole, the through hole and the small hole in sequence.
[0009] Specifically, a support sleeve is installed at one end of the transverse plate away from the bearing seat, a first bearing is installed in the support sleeve, and one end of the screw rod away from the coupling is inserted in the first bearing.
[0010] Specifically, two second planes are provided on the annular side surface of the movable seat, a connecting ear is installed on the second plane facing the push-pull plate by means of screws, a connecting seat is installed on the side of the connecting ear facing away from the movable seat, the connecting seat is connected and fixed to the push-pull plate by means of multiple screws, a slider is installed on the second plane facing away from the push-pull plate, and the second plane on which the slider is installed is in sliding contact with the cross plate.
[0011] Specifically, two symmetrically arranged positioning ears are installed at one end of the support away from the protective cover. The positioning ears and the support are an integrally formed structure. The positioning ears and the support are arranged perpendicular to each other, and a plurality of positioning holes are evenly opened on one side of the positioning ears.
[0012] Beneficial effects of the present invention: 1. The lug of the semiconductor wafer fixture is inserted between the two protrusions. When the motor rotates forward or reverse, the motor drives the screw to rotate, and the ball nut pair converts the rotational motion of the screw into the linear movement of the push-pull plate, so that the push-pull plate drives the semiconductor wafer fixture to move back and forth through the two protrusions, thereby switching the semiconductor wafer between the two stations.
[0013] 2. Use positioning screws to connect the cross plate and the bearing seat to limit the position of the cross plate, so that the cross plate contacts the second plane on the movable seat, and then the cross plate and the second plane interact with each other to prevent the movable seat from rotating around the screw rod. Install the second bearing and support sleeve for supporting the screw rod at the end of the cross plate away from the bearing seat. At this time, the cross plate, the first bearing, the support sleeve and the bearing seat jointly support both ends of the screw rod to improve the stability of the structure.
[0014] 3. Insert the slider on the movable seat into the strip-shaped opening, and then the slider interacts with the strip-shaped opening, so that the reaction force received by the push-pull plate in the process of pushing and pulling the semiconductor wafer clamp acts on the bearing seat through the slider, the cross plate, etc., to prevent the reaction force received by the push-pull plate in the process of pushing and pulling the semiconductor wafer clamp from acting on the contact part between the ball nut pair and the screw rod, so as to facilitate the smooth movement of the ball nut pair and help to reduce the length of the ball nut pair. When the length of the screw rod is fixed, the effective moving stroke of the ball nut pair is increased, and the time spent on cleaning small debris entering between the ball nut pair and the screw rod is also shortened.
[0015] 4. Install the structure formed by the vertical plate, the upper guard plate and the lower guard plate in the strip mouth, and slide the slider between the upper guard plate and the lower guard plate. Therefore, during long-term use, under the protection of the upper guard plate and the lower guard plate, the slider is prevented from causing wear to the inner wall of the strip mouth. When the upper guard plate and the lower guard plate are worn and need to be replaced, the upper guard plate and the lower guard plate can be taken out of the strip mouth and replaced after removing the positioning screws, thereby reducing the cost of replacing parts. At the same time, the positioning screws are used to restrict the connecting plate and the cross plate on the bearing seat, thereby reducing the use of positioning screws.
[0016] 5. When installing the positioning screw, make the positioning screw pass through the round hole on the L-shaped plate, the through hole on the connecting plate, and the small hole on the cross plate, and then screw it into the threaded blind hole. At this time, under the support of the L-shaped plate, there is a gap between the head of the positioning screw and the connecting plate. When the head of the positioning screw cannot be normally clamped with the wrench due to rust, insert the hacksaw blade into the gap between the connecting plate and the L-shaped plate and saw off the positioning screw, thereby providing an alternative disassembly method for completing the splitting of the cross plate. Weld a column rod to the exposed end of the positioning screw remaining in the threaded blind hole, so as to facilitate the use of the column rod to remove the positioning screw remaining in the threaded blind hole. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 It is a structural schematic diagram of a push-pull mechanism of the present invention; Figure 2 It is a stereoscopic diagram of a push-pull mechanism of the present invention from another perspective; Figure 3 for Figure 1 Enlarged view of point A in the middle; Figure 4 It is a schematic diagram of the assembly of a screw rod, a ball nut pair, a cross plate, a moving seat and a peripheral seat in a push-pull mechanism of the present invention; Figure 5 It is a schematic diagram of the assembly of a connecting ear, a connecting seat and a push-pull plate in a push-pull mechanism of the present invention; Figure 6 It is a schematic diagram of assembling an L-shaped plate, an upper guard plate, a lower guard plate and a connecting plate in a push-pull mechanism of the present invention; Figure 7 It is a schematic assembly diagram of an L-shaped plate, an upper guard plate, a lower guard plate and a connecting plate in a push-pull mechanism of the present invention from another perspective; In the figure: 1, support, 2, protective cover, 3, motor, 4, coupling, 5, bearing seat, 6, connecting seat, 7, ball nut pair, 8, cross plate, 9, support sleeve, 10, first bearing, 11, screw rod, 12, protrusion, 13, positioning ear, 14, positioning hole, 15, push-pull plate, 16, connecting seat, 17, connecting ear, 18, first plane, 19, positioning screw, 20, L-shaped plate, 21, lower guard plate, 22, slider, 23, upper guard plate, 24, vertical plate, 25, connecting plate, 26, small hole, 27, strip mouth, 28, second plane, 29, perforation, 30, round hole. DETAILED DESCRIPTION
[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.
[0019] See also Figure 1 and Figure 2 The present invention provides a technical solution: a push-pull mechanism, including a support 1, and two symmetrically arranged positioning ears 13 are installed at one end of the support 1 away from the protective cover 2. The positioning ears 13 and the support 1 are an integrally formed structure. The positioning ears 13 and the support 1 are arranged perpendicular to each other. A plurality of positioning holes 14 are evenly opened on one side of the positioning ears 13, so that the screws pass through the positioning holes 14 and are installed at the desired position, thereby completing the restriction of the position of the support 1.
[0020] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 A protective cover 2 is installed on one side of the support 1, and a motor 3 is installed on one side of the protective cover 2. The output shaft of the motor 3 extends into the protective cover 2. The output shaft of the motor 3 is connected to a screw rod 11 through a coupling 4. The end of the screw rod 11 close to the coupling 4 is connected to a bearing seat 5 through a second bearing. The bearing seat 5 is connected to the protective cover 2 through screws. A ball nut pair 7 is sleeved on the screw rod 11. A movable seat 6 is installed on one side of the ball nut pair 7. A push-pull plate 15 is installed on the outer surface of the movable seat 6. Two second planes 28 are provided on the annular side surface of the movable seat 6. A connecting ear 17 is installed on the second plane 28 facing the push-pull plate 15 through screws. A connecting ear 17 is installed on the side of the connecting ear 17 away from the movable seat 6. The connecting seat 16 is connected and fixed to the push-pull plate 15 by multiple screws. The structure formed by the connecting ear 17 and the connecting seat 16 plays the role of connecting the movable seat 6 and the push-pull plate 15. The push-pull plate 15 is arranged in parallel with the screw rod 11. Two protrusions 12 are installed on the end of the push-pull plate 15 away from the movable seat 6, so that the protrusion of the semiconductor wafer clamp is inserted between the two protrusions 12. When the motor 3 rotates forward or reverse, the motor 3 drives the screw rod 11 to rotate, and the ball nut pair 7 converts the rotational motion of the screw rod 11 into the linear movement of the push-pull plate 15, so that the push-pull plate 15 drives the semiconductor wafer clamp to move back and forth through the two protrusions 12, thereby realizing the switching of the semiconductor wafer between the two workstations.
[0021] See also Figure 1-Figure 3 A transverse plate 8 is provided on the side of the movable seat 6 away from the push-pull rod, and one end of the transverse plate 8 is connected to the bearing seat 5 by a plurality of positioning screws 19. A support sleeve 9 is installed at the end of the transverse plate 8 away from the bearing seat 5, and a first bearing 10 is installed in the support sleeve 9. The end of the screw rod 11 away from the coupling 4 is inserted in the first bearing 10, and the positioning screw 19 is used to connect the transverse plate 8 and the bearing seat 5 to limit the position of the transverse plate 8, so that the transverse plate 8 contacts the second plane 28 on the movable seat 6, and then the transverse plate 8 interacts with the second plane 28 to prevent the movable seat 6 from rotating around the screw rod 11, and a second bearing and a support sleeve 9 for supporting the screw rod 11 are installed at the end of the transverse plate 8 away from the bearing seat 5. At this time, the transverse plate 8, the first bearing 10, the support sleeve 9 and the bearing seat 5 jointly support the two ends of the screw rod 11 to improve the stability of the structure.
[0022] See also Figure 1-Figure 5The side of the cross plate 8 facing the screw rod 11 is provided with a strip opening 27 arranged along the length direction of the cross plate 8, and a slider 22 is slidably installed in the strip opening 27, wherein the slider 22 is installed on the second plane 28 away from the push-pull plate 15, and the second plane 28 on which the slider 22 is installed is in sliding contact with the cross plate 8, so that the slider 22 on the movable seat 6 is inserted in the strip opening 27, and then the slider 22 interacts with the strip opening 27, so that the reaction force received by the push-pull plate 15 in the process of pushing and pulling the semiconductor wafer clamp acts on the bearing seat 5 through the slider 22, the cross plate 8, etc., preventing the reaction force received by the push-pull plate 15 in the process of pushing and pulling the semiconductor wafer clamp from acting on the contact part between the ball nut pair 7 and the screw rod 11, facilitating the smooth movement of the ball nut pair 7, and helping to reduce the length of the ball nut pair 7. When the length of the screw rod 11 is fixed, the effective moving stroke of the ball nut pair 7 is increased, and the time spent on cleaning small debris entering between the ball nut pair 7 and the screw rod 11 is also shortened.
[0023] See also Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 7The end of the horizontal plate 8 close to the bearing seat 5 is provided with a plurality of small holes 26, and the positioning screws 19 are inserted in the small holes 26. Two symmetrically arranged first planes 18 are provided on the annular side surface of the bearing seat 5. A plurality of threaded blind holes matching the small holes 26 are provided on the first plane 18 away from the push-pull plate 15. One end of the positioning screw 19 passes through the small hole 26 and is threadedly connected in the threaded blind hole. A connecting plate 25 is provided on the side of the small hole 26 away from the threaded blind hole. A plurality of through holes 26 aligned with the small holes 26 are provided on one side of the connecting plate 25. 9, the positioning screw 19 passes through the channel formed by the through hole 29 and the small hole 26, and one end of the connecting plate 25 is connected and fixed with a vertical plate 24, the vertical plate 24 and the connecting plate 25 are an integrally formed structure, the vertical plate 24 and the connecting plate 25 are arranged perpendicular to each other, the vertical plate 24 is inserted in the strip opening 27 on one side close to the bearing seat 5, an upper guard plate 23 is installed on the upper part of one side of the vertical plate 24, the upper guard plate 23 is in contact with the top of the strip opening 27, a lower guard plate 21 is provided on the lower side of the upper guard plate 23, and the lower guard plate 21 is arranged parallel to the upper guard plate 23, One end of the lower guard plate 21 is connected and fixed to the vertical plate 24, and the lower guard plate 21 fits with the bottom of the strip opening 27. The upper guard plate 23, the lower guard plate 21 and the vertical plate 24 are an integrally formed structure. The upper guard plate 23, the lower guard plate 21 and the vertical plate 24 are arranged perpendicular to each other. A slider 22 is provided between the lower guard plate 21 and the upper guard plate 23. The slider 22 is in sliding contact with the lower guard plate 21 and the upper guard plate 23. The structure formed by the vertical plate 24, the upper guard plate 23 and the lower guard plate 21 is installed in the strip opening 27, and the slider 22 is slidably installed on the upper guard plate Therefore, during long-term use, under the protection of the upper guard plate 23 and the lower guard plate 21, the slider 22 is prevented from causing wear to the inner wall of the strip opening 27. When the upper guard plate 23 and the lower guard plate 21 are worn and need to be replaced, the upper guard plate 23 and the lower guard plate 21 can be taken out from the strip opening 27 and replaced after removing the positioning screws 19, thereby reducing the cost of replacing parts. At the same time, the positioning screws 19 are used to restrict the connecting plate 25 and the cross plate 8 on the bearing seat 5, thereby reducing the use of the positioning screws 19.
[0024] See also Figure 1 , Figure 3 , Figure 6 and Figure 7An L-shaped plate 20 is provided on the side of the through hole 29 away from the small hole 26. One end of the L-shaped plate 20 is connected and fixed to the connecting plate 25. A plurality of round holes 30 are evenly opened on the side of the L-shaped plate 20 facing the connecting plate 25. The round holes 30 are aligned with the through holes 29. There is a gap between the round holes 30 and the through holes 29 for inserting the hacksaw blade. One end of the positioning screw 19 passes through the round hole 30, the through hole 29 and the small hole 26 in sequence. When installing the positioning screw 19, the positioning screw 19 passes through the round hole 30 on the L-shaped plate 20, the through hole 29 on the connecting plate 25, and the cross plate 26. The small hole 26 on 8 is then screwed into the threaded blind hole. At this time, under the support of the L-shaped plate 20, there is a gap between the head of the positioning screw 19 and the connecting plate 25. When the head of the positioning screw 19 cannot normally engage the wrench due to rust, a hacksaw blade is inserted into the gap between the connecting plate 25 and the L-shaped plate 20 and the positioning screw 19 is cut off, thereby providing an alternative disassembly method for completing the splitting of the cross plate 8, and a column rod is welded to the exposed end of the positioning screw 19 remaining in the threaded blind hole, so as to facilitate the use of the column rod to remove the positioning screw 19 remaining in the threaded blind hole.
[0025] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A push-pull mechanism, comprising a support (1), characterized in that: The support (1) is provided with a protective cover (2) on one side, and a motor (3) is provided with the protective cover (2) on one side. The output shaft of the motor (3) extends into the protective cover (2). The output shaft of the motor (3) is connected to a screw rod (11) via a coupling (4). The end of the screw rod (11) close to the coupling (4) is connected to a bearing seat (5) via a second bearing. The bearing seat (5) is connected to the protective cover (2) via screws. A ball nut pair (7) is sleeved on the screw rod (11). A movable seat (6) is provided on one side of the ball nut pair (7). The outer surface of the movable seat (6) is provided with a A push-pull plate (15) is provided, wherein the push-pull plate (15) is arranged in parallel with the screw rod (11), and two protrusions (12) are installed at one end of the push-pull plate (15) away from the movable seat (6). A transverse plate (8) is provided on the side of the movable seat (6) away from the push-pull rod, and one end of the transverse plate (8) is connected to the bearing seat (5) through a plurality of positioning screws (19). A strip opening (27) arranged along the length direction of the transverse plate (8) is provided on the side of the transverse plate (8) facing the screw rod (11), and a slider (22) is slidably installed in the strip opening (27), and the slider (22) is connected and fixed to the movable seat (6).
2. A push-pull mechanism according to claim 1, characterized in that: A plurality of small holes (26) are formed at one end of the transverse plate (8) close to the bearing seat (5), and positioning screws (19) are inserted into the small holes (26). Two symmetrically arranged first planes (18) are formed on the annular side surface of the bearing seat (5), and a plurality of threaded blind holes matching the small holes (26) are formed on the first plane (18) facing away from the push-pull plate (15), and one end of the positioning screw (19) passes through the small hole (26) and is threadedly connected in the threaded blind hole.
3. A push-pull mechanism according to claim 2, characterized in that: A connecting plate (25) is provided on the side of the small hole (26) away from the threaded blind hole. A plurality of through holes (29) aligned with the small hole (26) are formed on one side of the connecting plate (25). The positioning screw (19) passes through a channel formed by the through holes (29) and the small hole (26). A vertical plate (24) is connected and fixed to one end of the connecting plate (25). The vertical plate (24) is inserted into the strip opening (27) on one side close to the bearing seat (5). An upper guard plate (23) is installed on the upper part of one side of the vertical plate (24). The upper guard plate (23) is fitted with the top of the strip-shaped opening (27); a lower guard plate (21) is provided on the lower side of the upper guard plate (23); the lower guard plate (21) is arranged in parallel with the upper guard plate (23); one end of the lower guard plate (21) is connected and fixed to the vertical plate (24); the lower guard plate (21) is fitted with the bottom of the strip-shaped opening (27); a sliding block (22) is provided between the lower guard plate (21) and the upper guard plate (23); the sliding block (22) is in sliding contact with the lower guard plate (21) and the upper guard plate (23).
4. A push-pull mechanism according to claim 3, characterized in that: The vertical plate (24) and the connecting plate (25) are an integrally formed structure, the vertical plate (24) and the connecting plate (25) are arranged perpendicularly to each other, the upper guard plate (23), the lower guard plate (21) and the vertical plate (24) are an integrally formed structure, and the upper guard plate (23), the lower guard plate (21) and the vertical plate (24) are arranged perpendicularly to each other.
5. A push-pull mechanism according to claim 3, characterized in that: An L-shaped plate (20) is provided on the side of the through hole (29) facing away from the small hole (26), one end of the L-shaped plate (20) is connected and fixed to the connecting plate (25), and a plurality of circular holes (30) are evenly formed on the side of the L-shaped plate (20) facing the connecting plate (25), the circular holes (30) are aligned with the through hole (29), and there is a gap between the circular hole (30) and the through hole (29) for inserting a hacksaw blade, and one end of the positioning screw (19) passes through the circular hole (30), the through hole (29) and the small hole (26) in sequence.
6. A push-pull mechanism according to claim 1, characterized in that: A support sleeve (9) is installed at one end of the transverse plate (8) away from the bearing seat (5), a first bearing (10) is installed in the support sleeve (9), and an end of the screw rod (11) away from the coupling (4) is inserted in the first bearing (10).
7. A push-pull mechanism according to claim 1, characterized in that: The movable seat (6) has two second planes (28) on its annular side surface. A connecting ear (17) is installed on the second plane (28) facing the push-pull plate (15) by means of screws. A connecting seat (16) is installed on the side of the connecting ear (17) facing away from the movable seat (6). The connecting seat (16) is connected and fixed to the push-pull plate (15) by means of a plurality of screws. A sliding block (22) is installed on the second plane (28) facing away from the push-pull plate (15). The second plane (28) on which the sliding block (22) is installed is in sliding contact with the transverse plate (8).
8. A push-pull mechanism according to claim 1, characterized in that: Two symmetrically arranged positioning ears (13) are mounted on one end of the support (1) away from the protective cover (2); the positioning ears (13) and the support (1) are an integrally formed structure; the positioning ears (13) and the support (1) are arranged perpendicular to each other; and a plurality of positioning holes (14) are evenly formed on one side of the positioning ears (13).