Cylinder drive mechanism and PCB processing apparatus

Abstract

The application relates to the technical field of air cylinders, and discloses an air cylinder driving mechanism and a PCB processing device. The air cylinder driving mechanism comprises a target air cylinder, a target piston rod, a stop piece, a limiting assembly, a power piece and a limiting piece. The target piston rod can move along a first direction. The stop piece is connected with the target piston rod. The limiting assembly comprises the power piece and the limiting piece which are connected with each other. The limiting piece is provided with a limiting surface. The power piece can drive the limiting piece to move, so that the target piston rod can move along the first direction, and the stop piece can abut against the limiting surface along the first direction. The air cylinder driving mechanism and the PCB processing device provided by the application can solve the problem that the piston rod of the air cylinder driving mechanism cannot realize multi-position accurate stopping.

Description

Technical Field

[0001] This application relates to the field of cylinder technology, and in particular to a cylinder drive mechanism and PCB processing equipment. Background Technology

[0002] In some PCB processing equipment, it is often necessary to achieve precise control of the drive mechanism to stop at multiple positions within a narrow space. The commonly used drive mechanism is generally a controllable motor drive mechanism. Because it is composed of multiple parts such as motor, guide rail, drive parts and auxiliary parts, its structure is quite complex and its size is large, making it impossible to miniaturize and set in a narrow space.

[0003] Therefore, a cylinder drive mechanism was developed to replace the controllable motor drive mechanism. The cylinder drive mechanism has a simpler and more compact structure, which is suitable for placement in narrow spaces. However, its piston rod can only achieve control in two positions: fully retracted and fully extended. It is difficult to stop accurately in other positions, which cannot meet the usage requirements. Utility Model Content

[0004] This application provides a cylinder drive mechanism and PCB processing equipment to solve the problem that the piston rod of the existing cylinder drive mechanism cannot achieve precise stopping at multiple positions.

[0005] In a first aspect, embodiments of this application provide a cylinder drive mechanism, including: A target cylinder having a target piston rod, the target piston rod being movable along a first direction; A stop element is connected to the target piston rod; A limiting assembly includes a power component and a limiting component connected to each other. The limiting component is provided with a limiting surface. The power component can drive the limiting component to move so that the target piston rod can move along the first direction and the stop component can abut against the limiting surface along the first direction.

[0006] In some embodiments, at least two limiting surfaces are provided, and the positions of the at least two limiting surfaces in the first direction are different; the power member is configured to drive any of the limiting surfaces on the limiting member to abut against the stop member in a direction opposite to the first direction.

[0007] In some embodiments, the power member can drive the limiting member to move along a second direction such that different limiting surfaces on the limiting member abut against the stop member in a direction opposite to the first direction, the second direction being perpendicular to the first direction.

[0008] In some embodiments, the power component is configured as a power cylinder, which includes a power piston rod connected to the limiting component.

[0009] In some embodiments, the cylinder drive mechanism further includes a detection component for detecting the position of the power piston rod in the second direction.

[0010] In some embodiments, the cylinder drive mechanism further includes a pilot valve and a solenoid valve, wherein the power cylinder is connected to the pilot valve and the solenoid valve is connected to the pilot valve.

[0011] In some embodiments, the limiting component further includes a guide member, the limiting member being in sliding or rolling engagement with the guide member, and the direction of movement of the limiting member relative to the guide member being parallel to the second direction.

[0012] In some embodiments, the power member can drive the limiting member to rotate such that different limiting surfaces on the limiting member abut against the stop member in a direction opposite to the first direction, and the rotation axis of the limiting member is perpendicular to or parallel to the first direction.

[0013] In some embodiments, the limiting member is provided with a clearance groove that extends through the limiting surface, and the stop member is capable of abutting against the limiting surfaces on both sides of the clearance groove along the first direction.

[0014] Secondly, embodiments of this application provide a PCB processing equipment, the PCB processing equipment including the cylinder drive mechanism as described in the first aspect, a positioning pin being provided on the worktable, and the cylinder drive mechanism being disposed on the worktable for driving the positioning pin to move relative to the worktable.

[0015] The cylinder drive mechanism provided in this application has the following advantages: Since the target cylinder has a target piston rod, and the target piston rod can move along a first direction, the target piston rod can achieve precise stopping at both the fully extended and fully retracted positions. Furthermore, since the stop member is connected to the target piston rod, and the limiting assembly includes a connected power member and a limiting member, with a limiting surface provided on the limiting member, the power member can drive the limiting member to move, allowing the target piston rod to move along the first direction and the stop member to abut against the limiting surface along the first direction. This also allows the target piston rod to achieve precise stopping at an intermediate position between the fully extended and fully retracted positions. Therefore, the target piston rod can achieve precise stopping at three positions: fully extended, fully retracted, and intermediate, thus solving the problem that existing cylinder drive mechanisms cannot achieve precise stopping of the piston rod at multiple positions.

[0016] The advantages of the PCB processing equipment provided in this application compared to the prior art can be seen in the description of the advantages of the cylinder drive mechanism provided in this application compared to the prior art, which will not be repeated here. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the cylinder drive mechanism in one embodiment of this application.

[0019] The markings in the diagram mean: 100. Cylinder drive mechanism; 10. Target cylinder; 11. Target piston rod; 20. Stop components; 21. Stop surface; 22. Connecting part; 30. Power components; 40. Limiting components; 401. Alternating groove; 41. First limiting surface; 42. Second limiting surface; 43. Third limiting surface; 50. Magnetic switch; 60. Fixed bracket. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0023] In this specification, references to "one embodiment," "some embodiments," or simply "embodiment" mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. Furthermore, in one or more embodiments, specific features, structures, or characteristics may be combined in any suitable manner.

[0024] In some PCB processing equipment, it is often necessary to achieve precise control of the drive mechanism to stop at multiple positions within a narrow space. The commonly used drive mechanism is generally a controllable motor drive mechanism. Because it is composed of multiple parts such as motor, guide rail, drive parts and auxiliary parts, its structure is quite complex and its size is large, making it impossible to miniaturize and set in a narrow space.

[0025] Therefore, a cylinder drive mechanism was developed to replace the controllable motor drive mechanism. The cylinder drive mechanism has a simpler and more compact structure, which is suitable for placement in narrow spaces. However, its piston rod can only achieve control in two positions: fully retracted and fully extended. It is difficult to stop accurately in other positions, which cannot meet the usage requirements.

[0026] In view of this, this application provides a cylinder drive mechanism and PCB processing equipment. Since the target cylinder has a target piston rod, and the target piston rod can move along a first direction, the target piston rod can achieve precise stopping at the fully extended position and the fully retracted position. Furthermore, since the stop member is connected to the target piston rod, and the limiting component includes a connected power member and a limiting member, and the limiting member has a limiting surface, the power member can drive the limiting member to move, so that the target piston rod can pass through the limiting member along the first direction, and the stop member can abut against the limiting surface along the first direction. Therefore, the target piston rod can also achieve precise stopping at an intermediate position between the fully extended position and the fully retracted position. Thus, the target piston rod can achieve precise stopping at three positions: fully extended position, fully retracted position, and intermediate position, thereby solving the problem that the piston rod of existing cylinder drive mechanisms cannot achieve precise stopping at multiple positions.

[0027] To illustrate the technical solution of this application, the following description is provided in conjunction with specific accompanying drawings and embodiments.

[0028] Please refer to Figure 1In one aspect, embodiments of this application provide a cylinder drive mechanism 100, including a target cylinder 10, a stop member 20, and a limiting component.

[0029] The target cylinder 10 has a target piston rod 11, which is capable of moving along a first direction.

[0030] The target cylinder 10 may also include a cylinder barrel, a piston, and seals. The first direction may be the direction indicated by arrow M in the figure. The target piston rod 11 can extend to a fully extended position along the first direction, at which point the target piston rod 11 cannot extend further along the first direction. The target piston rod 11 can retract to a fully retracted position along a direction opposite to the first direction, at which point the target piston rod 11 cannot retract further along the direction opposite to the first direction.

[0031] The stop member 20 is connected to the target piston rod 11.

[0032] The stop member 20 and the target piston rod 11 can be connected by means of bonding, welding, snap-fit, screw connection, bolt connection or snap-fit ​​connection. The bottom, top or middle part of the target piston rod 11 is connected to the stop member 20, and the end of the target piston rod 11 protrudes from the stop member 20.

[0033] The limiting assembly includes a power member 30 and a limiting member 40 connected to each other. The limiting member 40 is provided with a limiting surface. The power member 30 can drive the limiting member 40 to move so that the target piston rod 11 can move along a first direction and the stop member 20 can abut against the limiting surface along the first direction.

[0034] When the power component 30 does not drive the limiting component 40 to move, the target piston rod 11 can extend to the fully extended position along the first direction, and the target piston rod 11 can retract to the fully retracted position along the opposite direction to the first direction.

[0035] After the power component 30 drives the limiting component 40 to move, the target piston rod 11 can move along the first direction, causing the stop component 20 to abut against the limiting surface along the first direction. At this time, the target piston rod 11 is located in the intermediate position between the fully extended position and the fully retracted position. The target piston rod 11 is used to drive the corresponding structure to achieve precise multi-position movement. The target piston rod 11 may or may not penetrate the stop component 20. The stop component 20 may be provided with a raised step, and the raised step is provided with a stop surface 21. The stop surface 21 is used to abut against the limiting surface on the limiting component 40. The limiting surface is provided on the limiting step of the limiting component 40. The stop component 20 may include a connecting part 22, which is used to connect with other structures.

[0036] The power component 30 can drive the limiting component 40 to move along a straight or curved path, and can also drive the limiting component 40 to rotate. The power component 30 may include a motor and a lead screw, or it may include a cylinder and a control valve. The control valve of the power component 30 can control the cylinder to extend, retract, or stop, but the control precision is low and insufficient to meet the application requirements. The limiting surface on the limiting component 40 allows the power component 30 to stop within the stroke of the limiting surface during the movement of the limiting component 40, thus enabling the stop component 20 to abut against the limiting surface along the first direction. Compared to directly controlling the cylinder to stop, using another cylinder to drive the limiting surface to abut against the stop component 20 is more precise.

[0037] As can be seen from the above, the cylinder drive mechanism 100 provided in this application embodiment, because the target cylinder 10 has a target piston rod 11, and the target piston rod 11 can move along the first direction, the target piston rod 11 can achieve precise stopping at the fully extended position and the fully retracted position. Furthermore, because the stop member 20 is connected to the target piston rod 11, and the limiting assembly includes a connected power member 30 and a limiting member 40, and the limiting member 40 is provided with a limiting surface, the power member 30 can drive the limiting member 40 to move, so that the target piston rod 11 can move along the first direction, and the stop member 20 can abut against the limiting surface along the first direction. Therefore, the target piston rod 11 can also achieve precise stopping at the intermediate position between the fully extended position and the fully retracted position. Thus, the target piston rod 11 can achieve precise stopping at three positions: the fully extended position, the fully retracted position, and the intermediate position, achieving different extension distances of the target piston rod 11, thereby solving the problem that the piston rod of the existing cylinder drive mechanism cannot achieve precise stopping at multiple positions.

[0038] Please continue to refer to this. Figure 1 In some embodiments, at least two limiting surfaces are provided, and the positions of the at least two limiting surfaces in the first direction are different; the power member 30 is configured to drive any of the limiting surfaces on the limiting member 40 to abut against the stop member 20 in a direction opposite to the first direction.

[0039] By adopting the above scheme, the different limiting surfaces on the limiting member 40 can be driven by the power member 30 to abut against the stop member 20 in a direction opposite to the first direction, so that the stop member 20 abuts against different limiting surfaces in the first direction, thereby achieving precise stopping of the target piston rod 11 at the corresponding position.

[0040] For example, the limiting surface includes a first limiting surface 41, a second limiting surface 42, and a third limiting surface 43. The first limiting surface 41, the second limiting surface 42, and the third limiting surface 43 are positioned differently in the first direction. The power member 30 can drive the limiting member 40 to move to the first position, the second position, and the third position, respectively. When the limiting member 40 is in the first position, the stop member 20 can abut against the first limiting surface 41 along the first direction. When the limiting member 40 is in the second position, the stop member 20 can abut against the second limiting surface 42 along the first direction. When the limiting member 40 is in the third position, the stop member 20 can abut against the third limiting surface 43 along the first direction, thereby enabling the target piston rod 11 to achieve precise stopping in five positions.

[0041] Understandably, multiple limiting surfaces can include even more limiting surfaces, thereby enabling the target piston rod 11 to achieve precise stopping at more positions. Multiple limiting steps can be provided on the limiting member 40, each limiting step defining a different limiting surface, and its height can be set according to the needs of the multiple limiting surfaces.

[0042] Optionally, the power component 30 can drive the limiting component 40 to move along the second direction, so that different limiting surfaces on the limiting component 40 abut against the stop component 20 in a direction opposite to the first direction. The second direction is perpendicular to the first direction and can be the direction indicated by arrow N in the figure.

[0043] With this configuration, the power component 30 can drive the limiting component 40 to move to different positions along the second direction, so that different limiting surfaces on the limiting component 40 abut against the stop component 20 in the opposite direction to the first direction, thereby achieving precise stopping of the target piston rod 11 at multiple corresponding positions.

[0044] As one possible implementation method, the power component 30 is configured as a power cylinder, which includes a power piston rod connected to the limiting component 40.

[0045] This design simplifies the structure of the power component 30 and facilitates its connection with the limiting component 40.

[0046] It should be noted that the power cylinder may also include a cylinder barrel, piston, and seals. The power piston rod and the limiting member 40 can be connected by means of bonding, welding, snap-fitting, screw connection, bolt connection, or snap-fit ​​connection. The limiting member 40 is driven by the power cylinder and can only move parallel to the second direction, and can maintain the necessary positional accuracy after bearing forces in all directions.

[0047] The cylinder drive mechanism 100 provided in this application embodiment is adapted and installed by the target cylinder 10 and the power cylinder according to the space, which can achieve precise stopping of the target piston rod 11 of the target cylinder 10 at multiple positions.

[0048] Optionally, the cylinder drive mechanism 100 provided in this application embodiment may further include a fixed bracket 60, on which the target cylinder 10 and the power cylinder are mounted.

[0049] Please refer to Figure 1 In some embodiments, the cylinder drive mechanism 100 further includes a detection component for detecting the position of the power piston rod in a second direction.

[0050] By adopting the above scheme, the power component 30 can drive the limiting component 40 to move to different positions along the second direction with relatively high precision.

[0051] It should be noted that the detection components may include detection sensors or magnetic switches 50, etc.

[0052] For example, the detection component includes multiple magnetic switches 50, which are arranged sequentially along the second direction. Magnetic switches 50 can be installed on both sides of the power cylinder. Each limiting surface and the extended and retracted positions of the power piston rod correspond to one magnetic switch 50.

[0053] Optionally, the cylinder drive mechanism 100 also includes a pilot valve and a solenoid valve, wherein the power cylinder is connected to the pilot valve and the solenoid valve is connected to the pilot valve.

[0054] With this configuration, the pilot valve and solenoid valve can work together to control the power cylinder, so that the power cylinder can drive the limiting member 40 to move to different positions along the second direction.

[0055] Optionally, the limiting component further includes a guide member, the limiting member 40 slidingly engaging or rollingly engaging with the guide member, and the moving direction of the limiting member 40 relative to the guide member being parallel to the second direction.

[0056] This design ensures that the limiting member 40 moves with high precision and stability along the second direction, without significant shaking.

[0057] For example, the guide can be a linear guide or the like.

[0058] For example, the pilot valve is a pilot-operated check valve, and the solenoid valve is a dual-electrically controlled, center-sealed (or center-leaking) five-port three-position solenoid valve.

[0059] The outlet of the power cylinder (hereinafter referred to as "outlet" and the other outlet as "inlet") is equipped with a pilot-operated check valve. The inlet and outlet of the power cylinder are connected to a dual-electrically controlled five-port three-position solenoid valve, which controls the extension or stop.

[0060] The initial standby state of the structure is as follows: Figure 1As shown, the power piston rod of the power cylinder retracts to the bottom in the direction opposite to the second direction. At this time, the fourth magnetic switch 50 from the left (hereinafter, the number refers to left to right) detects the position of the power piston rod and feeds back the information to the control system (such as control chip, microcontroller or programmable logic controller, etc.) that the power piston rod of the power cylinder is now in the origin state, and at the same time, the target piston rod 11 of the target cylinder 10 is also in the retracted state.

[0061] When the target piston rod 11 of the target cylinder 10 needs to extend to its maximum stroke, the power piston rod of the power cylinder is in the retracted state, such as... Figure 1 As shown, the target piston rod 11 of the target cylinder 10 can be extended to the top to reach the fully extended position.

[0062] When the target piston rod 11 of the target cylinder 10 needs to extend to its second maximum stroke, the dual-electrically controlled five-port three-position solenoid valve opens to allow air intake, triggering the pilot-operated check valve to open, allowing the power cylinder to exhaust air and driving the power piston rod to extend to the left (along the second direction). When the power piston rod is detected by the third magnetic switch 50, the dual-electrically controlled five-port three-position solenoid valve immediately switches to the center-sealed position to close the air intake. At this time, the pilot-operated check valve is closed because there is no guiding air pressure, and the outlet air is not allowed to continue to exhaust air. At this moment, the power piston rod stops (although the power piston rod will also change position due to the residual pressure at the air intake), and the first limiting surface 41 corresponding to the first step of the limiting member 40 has been pushed onto the stop member 20.

[0063] When the target piston rod 11 of the target cylinder 10 extends, the stop member 20 will rise and abut against the first limiting surface 41, and be stopped by the limiting member 40. At this time, when the target piston rod 11 is fully retracted, the distance between the stop member 20 and the first limiting surface 41 is the extension distance of the target piston rod 11 of the target cylinder 10.

[0064] Because the limiting component 40 is a precision-machined part and is installed on the linear guide rail, the positional accuracy of the target piston rod 11 of the target cylinder 10 in the extension and retraction direction is guaranteed.

[0065] Since the stop member 20 and the limiting surface are in surface contact, the small positional deviation caused by the residual pressure of the power cylinder will not cause the stop member 20 to disengage from the limiting surface. Therefore, the extension distance of the target piston rod 11 of the target cylinder 10 can be precisely controlled. Similarly, to determine which extension stroke of the target piston rod 11 of the target cylinder 10 is required, the corresponding magnetic switch 50 triggers the solenoid valve to drive the power cylinder to move the limiting surface of the limiting member 40 so that it extends and closely abuts against the stop member 20.

[0066] The cylinder drive mechanism 100 provided in this application embodiment can achieve precise stopping of the target piston rod 11 of the target cylinder 10 at multiple positions, and can achieve precise stopping of multi-position movement in a compact space. It has a simple structure, is easy to control, and is low in cost.

[0067] In other embodiments, the power member 30 can drive the limiting member 40 to rotate so that different limiting surfaces on the limiting member 40 abut against the stop member 20 in a direction opposite to the first direction, and the rotation axis of the limiting member 40 is perpendicular to or parallel to the first direction.

[0068] By adopting the above scheme, the limiting member 40 can be driven to rotate to different positions by the power member 30, so that different limiting surfaces abut against the stop member 20 in the opposite direction to the first direction, and the stop member 20 abuts against different limiting surfaces in the first direction, thereby achieving precise stopping of the target piston rod 11 at multiple corresponding positions.

[0069] Please refer to Figure 1 In some embodiments, the limiting member 40 is provided with a relief groove 401 that extends through the limiting surface, and the stop member 20 can abut against the limiting surfaces on both sides of the relief groove 401 along the first direction.

[0070] By adopting the above solution, the force on the stop member 20 when it abuts against the limiting surface can be more balanced, and it will not tilt.

[0071] It should be noted that the clearance groove 401 can penetrate the limiting member 40 along the first direction and also through the limiting member 40 along the second direction, so that when the limiting member 40 moves along the second direction, other structures such as the target piston rod 11, the connecting part 22 of the stop member 20, or the positioning pin connected to the target piston rod 11 can enter the clearance groove 401 without interference.

[0072] Secondly, embodiments of this application provide a PCB processing equipment, which includes a cylinder drive mechanism 100 as described in the first aspect, and a positioning pin is provided on the worktable. The cylinder drive mechanism 100 is disposed on the worktable and is used to drive the positioning pin to move relative to the worktable.

[0073] The PCB processing equipment provided in this application embodiment has a target piston rod 11 in the target cylinder 10, and the target piston rod 11 can move along the first direction. Therefore, the target piston rod 11 can achieve precise stopping at the fully extended position and the fully retracted position. Furthermore, since the stop member 20 is connected to the target piston rod 11, and the limiting assembly includes a connected power member 30 and a limiting member 40, with the limiting member 40 having a limiting surface, the power member 30 can drive the limiting member 40 to move, allowing the target piston rod 11 to move along the first direction and the stop member 20 to abut against the limiting surface along the first direction. This also allows the target piston rod 11 to achieve precise stopping at an intermediate position between the fully extended and fully retracted positions, thus solving the problem that the piston rod of the existing cylinder drive mechanism cannot achieve precise stopping at multiple positions, and enabling precise movement of the positioning pin at multiple positions.

[0074] Understandably, the locating pin can be connected to the target piston rod 11 or the stop member 20.

[0075] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A cylinder drive mechanism, characterized in that, include: A target cylinder having a target piston rod, the target piston rod being movable along a first direction; A stop element is connected to the target piston rod; A limiting assembly includes a power component and a limiting component connected to each other. The limiting component is provided with a limiting surface. The power component can drive the limiting component to move so that the target piston rod can move along the first direction and the stop component can abut against the limiting surface along the first direction.

2. The cylinder drive mechanism according to claim 1, characterized in that, At least two limiting surfaces are provided, and the positions of the at least two limiting surfaces in the first direction are different; the power member is configured to drive any one of the limiting surfaces on the limiting member to abut against the stop member in a direction opposite to the first direction.

3. The cylinder drive mechanism according to claim 2, characterized in that, The power component can drive the limiting component to move along a second direction, such that different limiting surfaces on the limiting component abut against the stop component in a direction opposite to the first direction, wherein the second direction is perpendicular to the first direction.

4. The cylinder drive mechanism according to claim 3, characterized in that, The power component is configured as a power cylinder, which includes a power piston rod connected to the limiting component.

5. The cylinder drive mechanism according to claim 4, characterized in that, The cylinder drive mechanism further includes a detection component for detecting the position of the power piston rod in the second direction.

6. The cylinder drive mechanism according to claim 4, characterized in that, The cylinder drive mechanism also includes a pilot valve and a solenoid valve. The power cylinder is connected to the pilot valve, and the solenoid valve is connected to the pilot valve.

7. The cylinder drive mechanism according to claim 3, characterized in that, The limiting component further includes a guide member, which slides or rolls with the guide member, and the moving direction of the limiting member relative to the guide member is parallel to the second direction.

8. The cylinder drive mechanism according to claim 2, characterized in that, The power component can drive the limiting component to rotate, so that different limiting surfaces on the limiting component abut against the stop component in a direction opposite to the first direction, and the rotation axis of the limiting component is perpendicular to or parallel to the first direction.

9. The cylinder drive mechanism according to any one of claims 1 to 8, characterized in that, The limiting member is provided with a clearance groove that penetrates the limiting surface, and the stop member can abut against the limiting surfaces on both sides of the clearance groove along the first direction.

10. A PCB processing equipment, characterized in that, The PCB processing equipment includes a worktable and a cylinder drive mechanism as described in any one of claims 1 to 9. A positioning pin is provided on the worktable, and the cylinder drive mechanism is disposed on the worktable for driving the positioning pin to move relative to the worktable.

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