An automatic adjustment mechanism and method of using the same

Abstract

This invention discloses an automatic pin adjustment mechanism and its usage method, belonging to the field of automotive technology. The automatic pin adjustment mechanism includes: a base with a first slide rail on its upper end; a telescopic mechanism, with its first end mounted on the left side of the upper end of the base and its second end connected to the left side of the upper end of a movable plate, the telescopic mechanism driving the lower end of the movable plate to slide left and right along the first slide rail; a rotating mechanism mounted on the right side of the upper end of the movable plate; and a lifting mechanism, which is drivenly connected to the rotating mechanism, with a clamping part on its upper end for holding the upper end of the positioning pin. This invention designs an automatic pin adjustment mechanism with fast switching speed and simple structure. By designing different cylinders and rotating mechanisms on the same device, it automatically determines which set of positioning pins to use based on the vehicle model. Through the lifting, moving, and rotating of the cylinders, the positioning pins are directly rotated at 90°, adapting to the switching of pallet positioning pins for two different platform vehicle models.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and in particular to an automatic adjustment mechanism and its method of use. Background Technology

[0002] In the final assembly process of automobile production, locating pins are used to fix holes on the bottom of the vehicle body to ensure the accuracy requirements of the assembly process. The locating pins used on tooling such as pallets and lifting devices are such a structure. At the same time, in order to meet the needs of flexible production of different platform models, the design of locating pins generally takes into account the flexibility function. It is necessary to design an automatic adjustment mechanism for locating pins to realize the automatic adjustment function of locating pins according to the vehicle model.

[0003] Generally, the designed automatic switching devices are relatively complex in structure and have complex actions. This application provides a simple structure using a cylinder and gear rotation, which has the characteristics of fast switching speed and simple structure, and is suitable for switching pallet positioning pins. Summary of the Invention

[0004] To adapt to the switching of positioning pins for different platform vehicle models and improve the flexible switching speed of positioning pins, this invention designs an automatic pin adjustment mechanism with fast switching speed and simple structure. By designing different cylinders and rotating mechanisms on the same device, it automatically determines which set of positioning pins to use according to the vehicle model. Through the lifting, moving and rotating of the cylinders, the positioning pins are directly rotated at 90°. It can adapt to the switching of pallet positioning pins for two different platform vehicle models. At the same time, the structure is simple and can be switched quickly to meet the production needs of high-speed production lines.

[0005] This invention provides the following solution:

[0006] In a first aspect, this application describes an automatic restocking mechanism, comprising:

[0007] A base, wherein a first slide rail is provided at the upper end of the base;

[0008] The telescopic mechanism has a first end installed on the upper left side of the base and a second end connected to the upper left side of the movable plate. The telescopic mechanism drives the lower end of the movable plate to slide left and right along the first slide rail.

[0009] A rotating mechanism is mounted on the upper right side of the movable plate;

[0010] A lifting mechanism is provided, which rotates under the drive of the rotating mechanism. The upper end of the lifting mechanism is provided with a clamping part for clamping the upper end of the positioning pin. The lifting mechanism drives the clamping part to move up and down.

[0011] Preferably, the telescopic mechanism includes:

[0012] A telescopic cylinder, wherein the outer shell of the telescopic cylinder is mounted on the upper end of the base via a cylinder tailstock, and the piston rod of the telescopic cylinder is connected to the upper left side of the movable plate via a cylinder connector seat.

[0013] Preferably, the rotating mechanism includes:

[0014] A rotary cylinder, the outer shell of which is fixed to the upper end of the movable plate, and the piston rod of which drives the rack to move in the back-and-forth direction;

[0015] The gear has its inner side rotatably connected to the upper end of the movable plate via a rotating shaft, and its outer teeth mesh with the rack. The upper end of the gear is fixedly connected to the lower end of the lifting mechanism.

[0016] Preferably, the rotating mechanism further includes a rotary seat, the bottom of which is screwed to the upper surface of the movable plate, the middle part of the rotary shaft is located in the bearing inner hole of the rotary seat, and the lower end of the rotary shaft is fixedly connected to the inner side of the gear.

[0017] Preferably, the rotary shaft is a stepped shaft with a gradually increasing diameter from high to low, and the lower end of the rotary shaft is fixedly connected to the inner side of the gear by an interference fit or a key connection.

[0018] Preferably, the rack moves in the front-back direction via a second slide rail provided on the upper end face of the movable plate.

[0019] Preferably, the lifting mechanism includes:

[0020] A lifting cylinder, wherein the housing of the lifting cylinder is mounted on the upper end of the gear, and the upper end of the piston rod of the lifting cylinder is fixedly connected to the connecting block fixing plate;

[0021] A positioning pin connecting block is installed on the side of the connecting block fixing plate, and the clamping part is provided on the outer side of the positioning pin connecting block.

[0022] Preferably, the lifting cylinder housing is mounted on the upper end of the gear via a lifting cylinder fixing plate. The lifting cylinder fixing plate includes a horizontal section and a vertical section that are perpendicular to each other. The horizontal section is screwed into a threaded hole in the middle of the gear, and the vertical section is screwed into the side of the lifting cylinder housing.

[0023] Preferably, the base is provided with adjustable feet at the four corners of its bottom.

[0024] Secondly, this application also describes a method for using the automatic restocking mechanism, the method comprising:

[0025] S1: Based on the vehicle model information, determine the starting position A and ending position B of the positioning pin that needs to be switched;

[0026] S2: Extend the telescopic mechanism to the right and drive the movable plate to move towards the position of the positioning pin until the positioning pin connecting block reaches the starting position A. At this time, the positioning pin is engaged in the clamping part.

[0027] S3: Extend the lifting mechanism upward to lift the positioning pin from the starting position A, and then drive the rack to move back and forth to rotate the gear. At this time, the lifting mechanism will drive the positioning pin to the top of the end position B. Then, the lifting mechanism will drive the positioning pin downward to put the positioning pin into the end position B.

[0028] S4: After confirming that the positioning pin is in place, the telescopic mechanism retracts to the left, causing the movable plate to move away from the positioning pin. At this time, the positioning pin connecting block disengages from the positioning pin.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] This invention's automatic pin-changing mechanism enables unmanned, automated switching, completing the process within tens of seconds. This significantly reduces downtime during vehicle model changes and improves production line cycle time. Utilizing precision linear guides, rack and pinion transmission, and limit switch positioning, it achieves a repeatability accuracy of ±0.1mm, far exceeding the accuracy of manual pin changing, while also exhibiting high stability and a low failure rate. The switching action is program-controlled, easily integrating with the production line's MES / PLC system. It automatically calls the corresponding program based on different vehicle model instructions, perfectly adapting to mixed-flow production. It eliminates the safety risks of manual entry into the equipment for pin changing. The modular design of the mechanism allows for easy disassembly and replacement of key components such as cylinders and sensors, facilitating maintenance. A one-time investment replaces long-term manual operation, reducing losses caused by production downtime and quality defects, resulting in significant long-term comprehensive benefits. Attached Figure Description

[0031] Figure 1 This is a top view of the automatic adjustment mechanism of the present invention;

[0032] Figure 2 This is a front view of the automatic dispensing mechanism of the present invention;

[0033] Figure 3 This is a right-side view of the automatic dispensing mechanism of the present invention;

[0034] Figure 4 This is a schematic diagram of the gear of the present invention;

[0035] Figure 5 This is a schematic diagram of the rack of the present invention;

[0036] Figure 6 This is a schematic diagram of the automatic repositioning mechanism of the present invention applied to a pallet fixture;

[0037] In the picture:

[0038] 1. Base; 11. First slide rail; 12. Adjusting feet;

[0039] 2. Telescopic mechanism; 21. Telescopic cylinder; 22. Cylinder tailstock; 23. Cylinder connector seat;

[0040] 3. Rotating mechanism; 31. Rotary cylinder; 32. Rack; 33. Gear; 34. Second slide rail; 35. Rotary shaft; 36. Rotary seat; 37. End cover; 38. Rotary cylinder fixing plate;

[0041] 4. Lifting mechanism; 41. Lifting cylinder; 42. Connecting block fixing plate; 43. Positioning pin connecting block; 431. Clamping part; 44. Lifting cylinder fixing plate;

[0042] 5. Movable plate; 6. Limit switch; 7. Numbering plate; 8. Limit switch bracket. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the application. The singular forms “a,” “said,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0045] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0046] It should be understood that although the terms first, second, third, etc., may be used in the embodiments of this application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, first may also be referred to as second without departing from the scope of the embodiments of this application, and similarly, second may also be referred to as first.

[0047] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0048] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0049] It should be noted that any symbols and / or numbers present in the specification that are not marked in the accompanying drawings are not reference numerals.

[0050] Example 1

[0051] See Figure 1-6 As shown, an embodiment of the present invention provides an automatic restocking mechanism, comprising:

[0052] Base 1, with a first slide rail 11 at the upper end of base 1;

[0053] Telescopic mechanism 2, the first end of telescopic mechanism 2 is installed on the upper left side of the base 1, and the second end is connected to the upper left side of the movable plate 5. Telescopic mechanism 2 drives the lower end of the movable plate 5 to slide left and right along the first slide rail 11.

[0054] Rotating mechanism 3 is installed on the upper right side of the movable plate 5;

[0055] The lifting mechanism 4 rotates under the drive of the rotating mechanism 3. The upper end of the lifting mechanism 4 is provided with a clamping part 431 for clamping the upper end of the positioning pin. The lifting mechanism 4 drives the clamping part 431 to move up and down.

[0056] An integrated automatic pin adjusting unit is formed by a first slide rail on the base, a movable plate driven by a telescopic mechanism, a rotating mechanism mounted on the movable plate, and a lifting mechanism that rotates under the drive of the rotating mechanism and raises and lowers the clamping part. The telescopic mechanism enables the clamping part to move forward and backward, the rotating mechanism enables the clamping part to turn, and the lifting mechanism enables the positioning pin to be raised and lowered. The three work together to automatically switch the positioning pin between different workstations without manual intervention. The switching speed is fast, the structure is compact, and it is suitable for high-cycle production lines.

[0057] See Figure 1-3 As shown, the telescopic mechanism 2 includes:

[0058] Telescopic cylinder 21, the outer shell of telescopic cylinder 21 is installed on the upper end of base 1 through cylinder tailstock (22), and the piston rod of telescopic cylinder 21 is connected to the upper left side of movable plate 5 through cylinder connector seat 23.

[0059] The telescopic mechanism adopts a combination of telescopic cylinder, cylinder tailstock and cylinder connector seat. The piston rod directly drives the movable plate to slide along the first slide rail. The structure is simple and the response is fast. The cylinder has a large driving force and convenient stroke control. It can realize the clamping part to quickly approach and disengage from the positioning pin, which improves the reliability of switching action and repeatability of positioning accuracy.

[0060] See Figure 1-3 As shown, the rotating mechanism 3 includes:

[0061] Rotary cylinder 31, the outer shell of rotary cylinder 31 is fixed to the upper end of movable plate 5, and the piston rod of rotary cylinder 31 drives rack 32 to move in the front-back direction;

[0062] Gear 33 is rotatably connected to the upper end of movable plate 5 via rotary shaft 35 on its inner side. The outer teeth of gear 33 mesh with rack 32. The upper end of gear 33 is fixedly connected to the lower end of lifting mechanism 4.

[0063] The rotating mechanism adopts a structure in which a rotary cylinder drives a rack, the rack meshes with a gear, and the gear rotates around a rotary shaft to drive the lifting mechanism to rotate. This converts linear motion into precise rotary motion, with a stable transmission ratio and no slippage. It can achieve precise angular rotation of the lifting mechanism, thereby accurately switching the positioning pin to the target position. It has a fast rotation speed and high positioning accuracy.

[0064] See Figure 1-3 As shown, the rotating mechanism 3 also includes a rotary seat 36, the bottom of which is screwed to the upper end face of the movable plate 5. The middle part of the rotary shaft 35 is located in the bearing inner hole of the rotary seat 36, and the lower end of the rotary shaft 35 is fixedly connected to the inner side of the gear 33.

[0065] A rotary seat is added to the rotating mechanism. The bottom of the rotary seat is screwed to the movable plate. The middle part of the rotary shaft is located in the bearing inner hole of the rotary seat, which provides stable radial and axial support for the rotary shaft, reduces friction and shaking during rotation, improves the stability and repeatability of the lifting mechanism during rotation, and extends the service life of the mechanism.

[0066] See Figure 1-3 As shown, the rotary shaft 35 is a stepped shaft with a gradually increasing diameter from high to low. The lower end of the rotary shaft 35 is fixedly connected to the inner side of the gear 33 by interference fit or key connection.

[0067] The rotary shaft adopts a stepped shaft with a gradually increasing diameter from high to low, and the lower end is fixed to the inside of the gear through an interference fit or key connection, which enhances the connection strength and torsional resistance between the rotary shaft and the gear, avoids relative slippage or loosening during rotation, ensures the accuracy of rotation angle transmission, and further improves the reliability of the positioning pin switching.

[0068] See Figure 1-5 As shown, the rack 32 moves in the front-back direction via the second slide rail 34 provided on the upper end face of the movable plate 5.

[0069] The rack moves in the front-back direction via a second slide rail set on the upper surface of the movable plate. The second slide rail provides precise linear guidance for the rack, preventing it from wobbling or jamming during movement, ensuring the meshing stability between the rack and the gear, thereby improving the smoothness of the rotating mechanism and the switching accuracy.

[0070] See Figure 1-3 As shown, the lifting mechanism 4 includes:

[0071] Lifting cylinder 41, the outer shell of lifting cylinder 41 is mounted on the upper end of gear 33, and the upper end of piston rod of lifting cylinder 41 is fixedly connected to connecting block fixing plate 42;

[0072] The positioning pin connecting block 43 is installed on the side of the connecting block fixing plate 42, and a clamping part 431 is provided on the outer side of the positioning pin connecting block 43.

[0073] The lifting mechanism adopts a structure of lifting cylinder, connecting block fixing plate and positioning pin connecting block. The piston rod of the lifting cylinder drives the positioning pin connecting block to rise and fall through the connecting block fixing plate. The clamping part is opened on the outside of the positioning pin connecting block, which can reliably clamp the upper end of the positioning pin and achieve smooth lifting and lowering. The structure is simple, occupies little space, and the cylinder is easy to control, which can realize rapid lifting and lowering.

[0074] See Figure 1-3 As shown, the housing of the lifting cylinder 41 is mounted on the upper end of the gear 33 via the lifting cylinder fixing plate 44. The lifting cylinder fixing plate 44 includes a horizontal section and a vertical section that are perpendicular to each other. The horizontal section is screwed into the threaded hole in the middle of the gear 33, and the vertical section is screwed into the side of the housing of the lifting cylinder 41.

[0075] By screwing the gear and the lifting cylinder housing onto the horizontal and vertical sections of the lifting cylinder fixing plate respectively, the lifting cylinder is stably installed on the upper end of the gear. At the same time, the concentricity of the lifting cylinder and the gear is ensured, so that the lifting cylinder will not produce eccentric wobbling when rotating with the gear, thus improving the dynamic stability of the lifting mechanism during rotation.

[0076] See Figure 1-3 As shown, the base 1 has adjustable feet 12 at the four corners of its bottom.

[0077] The base has adjustable feet at the four corners, which can be rotated to adjust the height of each support point individually, thereby compensating for uneven ground and achieving horizontal calibration of the entire working plane of the mechanism. This ensures the positioning accuracy and operational stability of the adjustment mechanism in different installation environments.

[0078] Furthermore, it also includes an end cap 37, which is installed on the top of the rotary seat 36 and provides a certain degree of protection for the rotary seat 36.

[0079] Furthermore, the rotary cylinder 31 is mounted on the movable plate 5 via the rotary cylinder fixing plate 38.

[0080] Example 2

[0081] This application provides a method for using an automated restocking mechanism, the method comprising:

[0082] S1: Based on the vehicle model information, determine the starting position A and ending position B of the positioning pin that needs to be switched;

[0083] S2: Extend the telescopic mechanism 2 to the right and drive the movable plate 5 to move toward the position of the positioning pin until the positioning pin connecting block 43 reaches the starting position A. At this time, the positioning pin is engaged in the clamping part 431.

[0084] S3: Extend the lifting mechanism 4 upward to lift the positioning pin from the starting position A, and then drive the rack 32 to move back and forth to rotate the gear 33. At this time, the lifting mechanism 4 drives the positioning pin to the top of the end position B, and then the lifting mechanism 4 drives the positioning pin to move downward, thereby placing the positioning pin into the end position B.

[0085] S4: After confirming that the positioning pin is in place, the telescopic mechanism 2 retracts to the left, causing the movable plate 5 to move away from the positioning pin. At this time, the positioning pin connecting block 43 disengages from the positioning pin.

[0086] This method automatically determines the starting and ending positions based on vehicle model information, sequentially controlling the telescopic mechanism to feed, the clamping part to engage the positioning pin, the lifting mechanism to raise, the rotating mechanism to rotate, the lifting mechanism to lower and engage, and the telescopic mechanism to retract and disengage, forming a complete automatic switching closed loop. The entire process requires no manual intervention, with clear switching logic and smooth actions, quickly adapting to the positioning pin position requirements of different vehicle models, significantly improving the flexibility and cycle time efficiency of the production line.

[0087] Example 3

[0088] This embodiment provides an automatic pin adjustment mechanism for pallet fulcrums. This mechanism is an independent modular device, mainly composed of four functional parts: a support and base module, a pin switching execution module, a linear forward / backward drive module, and a detection and control module. All components are rigidly connected and precision guided to ensure reliable operation and repeatability.

[0089] 1. Support and base module

[0090] This module forms the stable foundation and height adjustment unit of the mechanism.

[0091] Base 1: It adopts a square tube welded frame structure with a machined mounting surface on the upper part to support all the components above. Adjustable feet 12 are provided at the four corners of the bottom.

[0092] Adjusting feet 12: These are combinations of threaded bolts and nuts, screwed into the threaded holes at the four corners of the base. By rotating the nuts, the height of each support point can be adjusted individually, thereby achieving level alignment of the entire mechanism's working plane and compensating for uneven ground.

[0093] 2. Pin position switching execution module

[0094] This module is the core component for enabling the positioning pin to switch between two preset workstations.

[0095] Rotary seat 36: is a vertically mounted support containing precision bearings, which is fixed to the movable plate 5 by bolts.

[0096] Rotary shaft 35: A stepped shaft, the lower end of which is fixed to the rotating gear 33 by interference fit or key connection. The shaft body passes through the bearing inner hole of the rotary seat 36 and can rotate freely.

[0097] Rotary gear 33: A spur gear that rotates synchronously with the rotary shaft 35 and serves as the input end for motion.

[0098] The locating pin connecting block 43 is a nylon block with an internal cavity that matches the outer contour of the locating pin (or pin seat), i.e., a clamping part 431, which serves to clamp and fix the rotating part of the locating pin. The locating pin connecting block 43 is fixed to the connecting block fixing plate 42 by bolts.

[0099] Connecting block fixing plate 42: an L-shaped plate, with a nylon block (1) fixed on one side and the other side fixed to the upper end of the piston rod of the lifting cylinder 41 by bolts.

[0100] Rack 32: A precision-machined straight rack that meshes with a rotating gear 33. One end of the rack is connected to the front end of the piston rod of the rotating cylinder 31 via a threaded or spherical bearing.

[0101] The rotary cylinder 31 is equipped with a matching L-shaped or block-shaped support, which is fixed to the movable plate 5 by bolts. The upper part of the support is machined with through holes or guide rails to provide horizontal movement guidance and support for the rack 32, ensuring smooth meshing.

[0102] 3. Linear forward and backward drive module

[0103] This module drives the entire switching execution module to move closer to or away from the tray to complete the clamping and releasing action of the pin.

[0104] First guide rail 11: Two sets of precision linear guide rail pairs. The guide rail slider is fixed to the bottom of the movable plate 5, and the guide rail is fixed to the upper surface of the base 1. The guide rail provides precise, low-friction linear motion guidance for the movable plate 5.

[0105] Movable plate 5: A heavy steel plate that serves as a moving platform for switching execution modules. The upper part is equipped with components such as rotary cylinders and lifting cylinders, while the bottom is fitted with a slider that matches the first guide rail 11.

[0106] Telescopic cylinder 21: This embodiment uses a double cylinder (or two independent cylinders connected in parallel) to obtain greater driving force and stability. The rear end of the cylinder body is hinged through a cylinder tailstock 22, which is fixed to the base 1. The front end of the cylinder piston rod is connected to the movable plate 5 through a cylinder connector seat 23.

[0107] Connecting plate 38: A reinforcing plate, possibly used to connect the rotary cylinder 31 and the movable plate 5 to increase structural rigidity.

[0108] 4. Detection and Control Module

[0109] This module is used to monitor the status of the mechanism, forming a control closed loop.

[0110] Number plate 7: A metal plate installed on the side of the movable plate 5. The plate is precisely machined with grooves or protrusions according to the two positions: forward (clamped) and backward (released).

[0111] Limit switch bracket 8: An L-shaped bracket fixed to the side of the base 1, with 2 to 4 limit switches 6 (such as proximity switches or mechanical limit switches) mounted on its upright plate. The sensing heads of the switches are directly facing the movement path of the signal plate 7. When the movable plate 5 moves to a specific position, the feature on the signal plate 7 triggers the corresponding limit switch, generating an electrical signal.

[0112] Limit switch 6: Used to detect key position signals such as clamping in place, releasing in place, and optionally adding rotation position A and rotation position B in place (which can be achieved by adding a trigger plate on the rotary shaft 35).

[0113] The work process is as follows:

[0114] Initial state: The automatic adjustment mechanism is in the retracted and released state, the movable plate retracts, the nylon block disengages from the positioning pin, and the limit switch SQ_Back is triggered.

[0115] Receive instruction: The host system sends vehicle model information, and the controller determines that the positioning pin position needs to be switched.

[0116] 1. Clamping the positioning pin: The controller drives the solenoid valve, causing the piston rod of the telescopic cylinder 21 to extend, pushing the movable plate 5 forward. The positioning pin connecting block 43, i.e., the nylon block, covers the rotating part of the positioning pin. SQ_Front is triggered to confirm that the clamping is in place, and the lifting cylinder 41 moves upward to lift the positioning pin.

[0117] 2. Rotation Switching: The controller maintains the telescopic cylinder 21 in its current state and controls the rotary cylinder 31 to drive the rack 32. The rack 32 drives the gear 33 and the rotary shaft 35 to rotate by a predetermined angle (e.g., 90° or 180°), switching the locating pin from above position A to above position B. The rotation to the correct position can be ensured by the dead point at the end of the rack's stroke, or confirmed by an additional rotation detection switch.

[0118] Step 3: Release and Disengage: After the positioning pin rotates to position B, the lifting cylinder 41 moves downward to lower the positioning pin. The controller drives the solenoid valve, causing the piston rod of the telescopic cylinder 21 to retract, which in turn moves the movable plate 5 backward, disengaging the nylon block from the positioning pin. SQ_Back is triggered again to confirm that the release is complete.

[0119] Completion feedback: The controller sends a switching completion signal to the upper-level system.

[0120] This automated pin-changing mechanism enables unmanned, automatic switching, completing the process in tens of seconds. This significantly reduces downtime during vehicle model changes and improves production line cycle time. Utilizing precision linear guides, rack and pinion transmission, and limit switch positioning, it achieves a repeatability accuracy of ±0.1mm, far exceeding the accuracy of manual pin changing, while also exhibiting high stability and a low failure rate. The switching action is program-controlled, easily integrating with the production line's MES / PLC system. It automatically calls the appropriate program based on different vehicle model instructions, perfectly adapting to mixed-flow production. It eliminates the safety risks of manual entry into the equipment for pin changing. The modular design of the mechanism allows for easy disassembly and replacement of key components such as cylinders and sensors, facilitating maintenance. A one-time investment replaces long-term manual operation, reducing losses due to production downtime and quality defects, resulting in significant long-term comprehensive benefits.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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 or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic burn-off mechanism characterized by, include: The base (1) has a first slide rail (11) at its upper end; Telescopic mechanism (2), the first end of the telescopic mechanism (2) is installed on the upper left side of the base (1), and the second end is connected to the upper left side of the movable plate (5). The telescopic mechanism (2) drives the lower end of the movable plate (5) to slide left and right along the first slide rail (11). Rotating mechanism (3), the rotating mechanism (3) is installed on the upper right side of the movable plate (5); The lifting mechanism (4) rotates under the drive of the rotating mechanism (3). The upper end of the lifting mechanism (4) is provided with a clamping part (431) for clamping the upper end of the positioning pin. The lifting mechanism (4) drives the clamping part (431) to move up and down.

2. The automatic dispensing mechanism according to claim 1, characterized in that, The telescopic mechanism (2) includes: Telescopic cylinder (21), the outer shell of the telescopic cylinder (21) is installed on the upper end of the base (1) through the cylinder tail seat (22), and the piston rod of the telescopic cylinder (21) is connected to the upper left side of the movable plate (5) through the cylinder connector seat (23).

3. The automatic dispensing mechanism according to claim 1, characterized in that, The rotating mechanism (3) includes: A rotary cylinder (31) has its outer shell fixed to the upper end of the movable plate (5). The piston rod of the rotary cylinder (31) drives the rack (32) to move in the front-back direction. The gear (33) is rotatably connected to the upper end of the movable plate (5) via a rotary shaft (35). The outer teeth of the gear (33) mesh with the rack (32). The upper end of the gear (33) is fixedly connected to the lower end of the lifting mechanism (4).

4. The automatic dispensing mechanism according to claim 3, characterized in that, The rotating mechanism (3) also includes a rotary seat (36), the bottom of which is screwed to the upper surface of the movable plate (5), the middle part of the rotary shaft (35) is located in the bearing inner hole of the rotary seat (36), and the lower end of the rotary shaft (35) is fixedly connected to the inner side of the gear (33).

5. The automatic dispensing mechanism according to claim 4, characterized in that, The rotary shaft (35) is a stepped shaft with a gradually increasing diameter from high to low. The lower end of the rotary shaft (35) is fixedly connected to the inner side of the gear (33) by interference fit or key connection.

6. The automatic dispensing mechanism according to claim 3, characterized in that, The rack (32) moves in the front-back direction via the second slide rail (34) provided on the upper end face of the movable plate (5).

7. The automatic dispensing mechanism according to claim 3, characterized in that, The lifting mechanism (4) includes: Lifting cylinder (41), the outer shell of the lifting cylinder (41) is installed on the upper end of the gear (33), and the upper end of the piston rod of the lifting cylinder (41) is fixedly connected to the connecting block fixing plate (42); A positioning pin connecting block (43) is installed on the side of the connecting block fixing plate (42), and the clamping part (431) is provided on the outer side of the positioning pin connecting block (43).

8. The automatic dispensing mechanism according to claim 7, characterized in that, The housing of the lifting cylinder (41) is mounted on the upper end of the gear (33) via the lifting cylinder fixing plate (44). The lifting cylinder fixing plate (44) includes a horizontal section and a vertical section that are perpendicular to each other. The horizontal section is screwed into the threaded hole in the middle of the gear (33), and the vertical section is screwed into the side of the housing of the lifting cylinder (41).

9. The automatic dispensing mechanism according to claim 1, characterized in that, The base (1) has adjustable feet (12) at the four corners of its bottom.

10. A method of using an automatic adjustment mechanism, characterized by, The method for using the automatic refill mechanism according to any one of claims 1-9, the method comprising: S1: Based on the vehicle model information, determine the starting position A and ending position B of the positioning pin that needs to be switched; S2: Extend the telescopic mechanism (2) to the right and drive the movable plate (5) to move towards the position of the positioning pin until the positioning pin connecting block (43) reaches the starting position A. At this time, the positioning pin is engaged in the clamping part (431). S3: Extend the lifting mechanism (4) upward to lift the positioning pin from the starting position A, and then drive the rack (32) to move back and forth to rotate the gear (33). At this time, the lifting mechanism (4) drives the positioning pin to the top of the end position B, and then the lifting mechanism (4) drives the positioning pin to move downward, so as to put the positioning pin into the end position B. S4: After the positioning pin is in place, the telescopic mechanism (2) retracts to the left, causing the movable plate (5) to move away from the positioning pin. At this time, the positioning pin connecting block (43) disengages from the positioning pin.

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