A rotary clamp for motorcycle parts machining

Abstract

The present application belongs to the technical field of motorcycle parts processing auxiliary equipment, and particularly relates to a rotary clamp for motorcycle parts processing, which comprises a rack, a rotating shaft rotatably connected to the rack, and a first fixed clamp statically connected to the rotating shaft; further comprising a second fixed clamp; the rotating shaft is statically connected with a supporting member, the supporting member and the second fixed clamp are rotatably connected with a linkage frame, and the rotary axis of the linkage frame is parallel to the axis of the rotating shaft; the linkage frame is provided with a groove for avoiding a welding gun; a driving shaft is rotatably connected to the rack, the driving shaft and the rotating shaft are provided with a first speed change gear set and a second speed change gear set, and the linkage frame is connected with an adjusting mechanism for switching the first speed change gear set and the second speed change gear set when the opening of the groove is opposite to the initial state. The present application solves the problem of the rotary clamp in the prior art that the volume is too large due to the need to meet the rotation space requirement of the parts.

Description

Technical Field

[0001] This invention belongs to the technical field of auxiliary equipment for motorcycle parts processing, and specifically relates to a rotary fixture for processing motorcycle parts. Background Technology

[0002] Motorcycle parts are often machined using jigs for securing them and facilitating the machining process. For components that need to be welded together, such as motorcycle frames or exhaust pipes with variable cross-sections, rotary jigs are used to hold the parts in place. By mounting these jigs on welding equipment, they support and position the parts to be welded and rotate them, thus improving machining convenience and efficiency.

[0003] Chinese Patent Publication No. CN 220028952 U discloses a brazing fixture with a rotating welding component, comprising a base. The fixture is characterized by: a support fixedly connected to the upper part of the base; a fixed column movably connected to the upper part of the base; a fixed block fixedly connected to one side of the fixed column; a motor disposed inside the fixed block; a transmission rod fixedly connected to the output end of the motor; a rotating disk fixedly connected to one end of the transmission rod; several fixed clamps fixedly connected to one side of the rotating disk; a first telescopic column fixedly connected to one side of each fixed clamp; a welding component clamp fixedly connected to one end of the first telescopic column; and a second telescopic column fixedly connected to one side of the support, with one end of the second telescopic column fixedly connected to the fixed column. The beneficial effects of this solution are as follows: The motor is installed at the rear of the fixture. When the motor is working, it can drive the fixture to rotate, which can avoid flipping the weldment during welding. When the weldment needs to be welded on both sides, the motor can be started to drive the weldment to flip through the fixture, eliminating the need for manual disassembly, flipping, and installation of the weldment, thus improving welding efficiency.

[0004] However, when the fixture disclosed in the above-mentioned technical solution is used to weld parts with annular weld seams, the welding operation involves rotating the parts while keeping the welding torch stationary. This requires separate motors for both clamps, placing extremely high demands on the synchronization of the two motors. Otherwise, misalignment of the welded parts can easily occur, leading to quality issues such as significant deviations in the welded shape. Towards the end of the welding operation, the welding current is appropriately reduced due to the arc-ending operation. Therefore, the rotation speed of the parts needs to be reduced to facilitate the finishing operation and reduce the risk of weld seam depressions at the end. However, reducing the rotation speed of the parts through motor control places high demands on the motor's performance. High-performance motors, with their numerous electrical components, require complete replacement and repeated adjustments in case of failure, severely impacting welding efficiency.

[0005] If a transmission mechanism is used between the two fixed clamps to achieve synchronous rotation of the two fixed clamps driven by a single motor, then a frame needs to be set between the two fixed clamps to install and support the transmission mechanism and one of the fixed clamps. Furthermore, the setting of the transmission mechanism and the frame needs to take into account the rotation space requirements of the parts during the welding operation. For example, some eccentrically positioned parts require a cylindrical space with a radius equal to the maximum vertical distance from the rotation axis to the edge of the contour. Therefore, the overall volume of the rotary fixture will be designed to be relatively large, making it impossible to install and use the rotary fixture on some welding equipment with limited installation space, which seriously affects the practicality of the rotary fixture.

[0006] If a linkage frame is set between the two fixed clamps, and a single motor is used to drive one of the fixed clamps to rotate synchronously so that both fixed clamps can rotate synchronously, this can reduce the number of motors required. However, the linkage frame connecting the two fixed clamps will interfere with the welding torch during use. This will prevent the parts to be welded from rotating a full circle in the fixture, resulting in the weld seam not closing. This will require separate reprocessing of the weld seam afterward, affecting both welding efficiency and welding quality. Therefore, the practicality of the rotating fixture is still relatively poor. Summary of the Invention

[0007] In view of the above-mentioned shortcomings in the prior art, the present invention provides a rotary fixture for processing motorcycle parts, which solves the problem that the rotary fixtures in the prior art are too large because they need to meet the rotation space requirements of the parts.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a rotary fixture for processing motorcycle parts, comprising a frame, a rotating shaft rotatably connected to the frame, and a first fixed clamp statically connected to the rotating shaft; further comprising a second fixed clamp; a support member statically connected to the rotating shaft, and a linkage frame rotatably connected between the support member and the second fixed clamp, wherein the rotation axis of the linkage frame is parallel to the axis of the rotating shaft; the linkage frame is provided with a groove for avoiding a welding torch; a drive shaft rotatably connected to the frame, and a first gear set and a second gear set are provided between the drive shaft and the rotating shaft; the linkage frame is connected to an adjustment mechanism for switching the first gear set and the second gear set when the opening orientation of the groove is opposite to the initial state.

[0009] The initial state refers to the state at the start of the welding operation.

[0010] With this configuration, the drive shaft and the rotating shaft are driven by the gear set with the smaller transmission ratio between the first and second gear sets. The linkage frame accommodates the welding torch through a groove. During the rotation of the component driven by the rotating fixture, the linkage frame rotates half a turn so that the opening of the groove faces the opposite direction from the initial state. This prevents interference between the linkage frame and the welding torch, which could prevent the rotating fixture from rotating the component to be welded from completing a full rotation. Simultaneously, the linkage frame switches between the first and second gear sets via an adjustment mechanism, changing the transmission between the drive shaft and the rotating shaft from a smaller transmission ratio to a larger transmission ratio. This reduces the speed at which the rotating fixture drives the component, thus slowing down the welding speed at the end of the weld and significantly reducing the occurrence of weld depressions at the weld completion stage, thereby ensuring weld quality. The rotary fixture using this solution, especially when welding eccentrically positioned parts, allows the rotary fixture to rotate together with the parts by placing the linkage frame on the side of the parts closer to the axis of rotation. This eliminates the need for the rotary fixture to be designed with space reserved for the rotation of the parts, thereby minimizing the size of the rotary fixture and significantly improving its practicality.

[0011] Furthermore, the adjustment mechanism includes a cooperating cylindrical cam and a slider. The cylindrical cam is statically connected to the linkage frame, and the rotation axis of the cylindrical cam is collinear with the rotation axis of the linkage frame. The slider is statically connected to both the first and second transmission gear sets. With this configuration, the linkage frame drives the cylindrical cam to rotate, which in turn drives the slider to move, thereby enabling the slider to switch between the first and second transmission gear sets. Using a cylindrical cam and slider to achieve the switching drive between gear sets simplifies the structure of the adjustment mechanism and improves the reliability of the fixture.

[0012] Furthermore, the first gear set includes a first driving gear and a first driven gear, and the second gear set includes a second driving gear and a second driven gear. The diameter of the first driving gear is smaller than the diameter of the second driving gear. The first driving gear is connected to the drive shaft via an overrunning clutch. Both the second driving gear and the first driven gear are statically connected to the drive shaft. Both the first driven gear and the second driven gear are connected to a keyway on the shaft. The first driven gear and the first driving gear slide in axial direction, and the second driven gear and the second driving gear engage in axial direction. The slider is statically connected to the second driven gear. With this configuration, when the first driving gear and the first driven gear are engaged, and the second driving gear and the second driven gear are also engaged, since the diameter of the first driving gear is smaller than that of the second driving gear, the driving shaft mainly drives the rotating shaft through the second gear set. At this time, the first driven gear drives the first driving gear, causing relative rotational motion between the first driving gear and the driving shaft under the action of the overrunning clutch. When the second driven gear is disengaged from the second driving gear under the action of the slider, the driving shaft drives the first driving gear to rotate through the overrunning clutch, thus driving the rotating shaft through the first gear set. The rotational speed of the rotating shaft is relatively reduced at this time, allowing the rotary fixture to rotate the parts to be welded at a relatively low speed. This solution helps reduce the manufacturing cost and improve the reliability of the rotary fixture. Furthermore, the switching between the first and second gear sets can be achieved by moving the second driven gear through the movement of the slider, improving the timeliness of speed adjustment and further enhancing the welding effect.

[0013] Furthermore, the first driven gear and the second driven gear are configured as a double gear and connected to the rotating shaft via a spline. This configuration makes the first driven gear and the second driven gear form a single unit, which helps to improve the reliability of the first driven gear and the second driven gear when sliding and transmitting power to the rotating shaft.

[0014] Furthermore, the rotating shaft is equipped with a reset element for resetting the second driven gear. This design allows the second driven gear to automatically reset after the slider loses its driving force, eliminating the need for a separate reset operation and improving the ease of use of the rotary fixture.

[0015] Furthermore, the reset component is a helical spring sleeved on the outside of the rotating shaft. This design allows the reset component to be installed and positioned using the rotating shaft, eliminating the need for separate installation and positioning settings. This reduces the manufacturing difficulty of the rotary fixture and improves its practicality.

[0016] Furthermore, the linkage frame is statically connected to a gear ring, the axis of which is collinear with the rotation axis of the linkage frame. The frame is statically connected to an arc-shaped rack that meshes with the gear ring, the center of which is collinear with the axis of the rotation axis, and the length of which is half the circumference of the gear ring. With this configuration, the rotation of the rotation axis causes the linkage frame to rotate as well. When the gear ring meshes with the arc-shaped rack, the relative movement between them causes the gear ring to rotate, thus rotating the linkage frame. After the gear ring rotates half a revolution, it separates from the arc-shaped rack. At this point, the linkage frame has rotated exactly 180 degrees, adjusting the opening of the groove on the linkage frame from the leeward side to the windward side. This facilitates the linkage frame's avoidance of the welding torch through the groove, allowing the linkage frame to rotate a full revolution with the rotation axis. This achieves automatic avoidance between the linkage frame and the welding torch, improving the practicality of the rotating fixture.

[0017] Furthermore, the support member is a disc coaxially arranged with the rotating shaft, and the arc-shaped rack is statically connected to a mounting bracket, which is rotatably connected to both the rotating shaft and the support member. This arrangement ensures the mounting bracket remains in a constant position by rotatably connecting it to both the rotating shaft and the disc, thus providing stable support for the arc-shaped rack. This improves the structural stability of the rotary fixture while reducing its manufacturing complexity.

[0018] Furthermore, the linkage frame is rotatably connected to the second fixed clamp and the support member via bearings. This arrangement reduces frictional resistance during the rotation of the linkage frame, resulting in smoother rotation and reduced maintenance frequency.

[0019] Furthermore, the slider is slidably engaged with the cylindrical cam via ball bearings. This configuration reduces wear between the slider and the cylindrical cam, thereby lowering the maintenance frequency of the rotary fixture.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. The rotary fixture in this solution can complete the rotation operation by connecting a geared motor to the drive shaft. There is no need to set up complex electronic control components to realize the speed change operation of the rotary fixture, thereby reducing the manufacturing cost of the rotary fixture and improving its reliability.

[0021] 2. The rotating fixture in this solution not only avoids interference with the welding torch, but also allows for a reduction in rotation speed at the end of the welding operation. This enables the rotating fixture to rotate the component a full revolution and allows for speed adjustment, allowing the component to complete the welding operation in one go and improving the welding quality. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the initial state of an embodiment of a rotating fixture for processing motorcycle parts according to the present invention; Figure 2 This is a schematic diagram of the gear ring and the arc-shaped rack just coming into contact in an embodiment of a rotating fixture for processing motorcycle parts according to the present invention; Figure 3 This is a schematic diagram of the gear ring and the arc-shaped rack in an embodiment of a rotating fixture for processing motorcycle parts according to the present invention, when they are in a meshing state. Figure 4 This is a schematic diagram of the toothed ring after passing through the arc-shaped rack area in an embodiment of a rotating fixture for processing motorcycle parts according to the present invention.

[0023] The reference numerals in the accompanying drawings include: second fixed clamp 1, linkage frame 2, groove 21, welding torch 3, first fixed clamp 4, support member 5, arc rack 6, drive shaft 7, overrunning clutch 8, first drive gear 9, second drive gear 10, frame 11, rotating shaft 12, second driven gear 13, first driven gear 14, slider 15, cylindrical cam 16, gear ring 17, mounting bracket 18. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0026] Example:

[0027] like Figures 1 to 4 As shown, a rotary clamp for processing motorcycle parts according to the present invention includes a frame 11, a rotating shaft 12 rotatably connected to the frame 11, and a first fixing clamp 4 statically connected to the rotating shaft 12. In this embodiment, the rotating shaft 12 is preferably connected to the frame 11 via a bearing. A support member 5 is statically connected to the rotating shaft 12. In this embodiment, the support member 5 is preferably a disc coaxially arranged with the rotating shaft 12, and the support member 5 is interference-fitted onto the rotating shaft 12. The first fixing clamp 4 is installed on the support member 5, thereby connecting and fixing the first fixing clamp 4 to the rotating shaft 12 via the support member 5, and causing the rotating shaft 12 to drive the first fixing clamp 4 to rotate via the support member 5. In this embodiment, the first fixing clamp 4 is a three-jaw chuck from the prior art. Of course, in other embodiments, the first fixing clamp 4 can also be other clamping and fixing mechanisms from the prior art, which will not be described in detail here.

[0028] The rotating fixture also includes a second fixed clamp 1. In this embodiment, the second fixed clamp 1 is preferably a three-jaw chuck as in the prior art. A linkage frame 2 is rotatably connected between the support member 5 and the second fixed clamp 1, and the rotation axis 12 of the linkage frame 2 is parallel to the axis of the rotating shaft 12, so that the linkage frame 2 can rotate independently when both the support member 5 and the second fixed clamp 1 remain stationary. The linkage frame 2 is rotatably connected to the second fixed clamp 1 and the support member 5 respectively through bearings. The linkage frame 2 is provided with a groove 21 for avoiding the welding torch 3, so that when the linkage frame 2 rotates together with the rotating fixture, the welding torch 3 is exactly opposite to the position of the groove 21.

[0029] A drive shaft 7 is rotatably connected to the frame 11. A first gear set and a second gear set are arranged between the drive shaft 7 and the rotating shaft 12. The transmission ratios of the first gear set and the second gear set are different, so that the rotating shaft 12 will obtain different rotational speeds when the first gear set and the second gear set are used for transmission respectively. In this embodiment, the transmission ratio of the first gear set is greater than that of the second gear set. In this embodiment, the first gear set includes a first drive gear 9 and a first driven gear 14, and the second gear set includes a second drive gear 10 and a second driven gear 13. The diameter of the first drive gear 9 is smaller than the diameter of the second drive gear 10. The first drive gear 9 is connected to the drive shaft 7 through an overrunning clutch 8. The second drive gear 10 is statically connected to the drive shaft 7. The first driven gear 14 and the second driven gear 13 are both keyed to the rotating shaft 12. The first driven gear 14 and the first drive gear 9 are in axial sliding engagement, and the second driven gear 13 and the second drive gear 10 are in axial engagement / disengagement engagement. In this embodiment, the first driven gear 14 and the second driven gear 13 are preferably arranged as a double gear and connected to the rotating shaft 12 by a spline. In this embodiment, the thickness of the first driving gear 9 is equal to the sum of the thickness of the first driven gear 14 and the thickness of the second driven gear 13, so that the first driven gear 14 and the first driving gear 9 remain engaged even when the second driven gear 13 and the second driving gear 10 are in a disengaged state.

[0030] The linkage frame 2 is connected to an adjustment mechanism for switching between the first and second gear sets when the opening of the groove 21 faces in the opposite direction to its initial state. In this embodiment, the adjustment mechanism includes a cooperating cylindrical cam 16 and a slider 15. The cylindrical cam 16 is statically connected to the linkage frame 2, and the rotation axis 12 of the cylindrical cam 16 is collinear with the rotation axis 12 of the linkage frame 2. Thus, the slider 15 can move along the axial direction of the rotation axis 12 by rotating the linkage frame 2. The slider 15 is also statically connected to both the first and second gear sets. In this embodiment, the slider 15 is statically connected to the first driven gear 14. Since the first driven gear 14 and the second driven gear 13 form a single unit, the slider 15 can simultaneously drive both the first driven gear 14 and the second driven gear 13. The static connection between the slider 15 and the first driven gear 14 is preferably a bolt connection. The slider 15 is slidably engaged with the cylindrical cam 16 via ball bearings.

[0031] The rotating shaft 12 is provided with a reset member (not shown) for resetting the second driven gear 13. In this embodiment, the reset member is preferably a helical spring sleeved on the outside of the rotating shaft 12. When the column cam 16 drives the first driven gear 14 and the second driven gear 13 to move through the slider 15, it will compress the reset member. When the force applied by the column cam 16 to the slider 15 disappears, the reset member will push the first driven gear 14 and the second driven gear 13 to reset.

[0032] A gear ring 17 is statically connected to the linkage frame 2, and the axis of the gear ring 17 is collinear with the rotation shaft 12 of the linkage frame 2. In this embodiment, the gear ring 17 and the linkage frame 2 are connected and fixed by an interference fit and a key connection. An arc-shaped rack 6 that mates with the gear ring 17 is statically connected to the frame 11. The center of the arc-shaped rack 6 is collinear with the axis of the rotation shaft 12, and the length of the arc-shaped rack 6 is equal to half the circumference of the gear ring 17. In this embodiment, a mounting bracket 18 is statically connected to the arc-shaped rack 6. The mounting bracket 18 is rotatably connected to both the rotation shaft 12 and the support member 5, so that the mounting bracket 18 remains stationary even when both the rotation shaft 12 and the support member 5 can rotate, thereby supporting the arc-shaped rack 6 and keeping its position unchanged.

[0033] The specific implementation process is as follows: The rotating fixture is mounted and fixed on the welding equipment via frame 11. A motor (not shown) with a reduction gear is connected to the drive shaft 7, thereby driving the drive shaft 7 to rotate and thus rotating the rotating fixture. The groove 21 on the linkage frame 2 of the rotating fixture is adjusted to face the welding torch 3 of the welding equipment, so that the opening of the groove 21 is located on the leeward side of the linkage frame 2 (e.g.,...). Figure 1(As shown). The two components to be welded into a part are fixed by the first fixing clamp 4 and the second fixing clamp 1. When welding begins, the motor drives the drive shaft 7 to rotate. At this time, the first drive gear 9 and the first driven gear 14 are in a meshing state, and the second drive gear 10 and the second driven gear 13 are also in a engaged state. However, since the transmission ratio of the first gear set is greater than that of the second gear set, the drive shaft 7 mainly drives the rotating shaft 12 to rotate through the second drive gear 10 and the second driven gear 13. At this time, the first drive gear 9 will generate relative rotational motion with the drive shaft 7 under the action of the first driven gear 14. As the rotating shaft 12 rotates, the rotating shaft 12 drives the first fixing clamp 4 to rotate through the support member 5. At the same time, the rotating shaft 12 drives the second fixing clamp 1 to rotate through the support member 5 and the linkage frame 2, thereby causing the entire part to be welded to rotate. During the rotation of the part, the welding torch 3 moves along the weld seam to realize the welding operation of the part, and at the same time, the welding torch 3 also moves out of the groove 21. As the rotating shaft 12 continues to rotate, when the linkage 2 moves to the point where the gear ring 17 contacts the arc-shaped rack 6 (as shown in the image), Figure 2 As shown), since the arc-shaped rack 6 remains stationary, the gear ring 17 will rotate under the action of the arc-shaped rack 6 as it moves with the linkage frame 2, thereby causing the gear ring 17 to drive the linkage frame 2 to rotate (as shown). Figure 3 As shown), when the linkage frame 2 rotates, it drives the column cam 16 to rotate, causing the column cam 16 to drive the first driven gear 14 and the second driven gear 13 to slide axially through the slider 15, so that the second driven gear 13 and the second driving gear 10 gradually switch from an engaged state to a disengaged state. Since the length of the arc-shaped rack 6 is equal to half the circumference of the gear ring 17, the gear ring 17 will rotate half a turn during the movement, so that the linkage frame 2 will also rotate half a turn, so that the groove 21 is adjusted from the leeward side of the linkage frame 2 to the windward side (as shown). Figure 4 (As shown). When the second driven gear 13 is disengaged from the second driving gear 10, the driving shaft 7 drives the rotating shaft 12 to rotate via the first driving gear 9 and the first driven gear 14. At this time, the rotational speed of the rotating shaft 12 will decrease, thereby reducing the rotational speed of the parts and the moving speed of the welding torch 3 at the weld seam, in order to meet the operational requirements of the welding tail section. When the linkage frame 2 moves to near the initial position, the welding torch 3 will gradually re-enter the groove 21, avoiding interference between the linkage frame 2 and the welding torch 3 during the complete rotation of the rotating shaft 12, thus allowing the welding torch 3 to perform a complete welding operation on the weld seam of the parts.

[0034] Using this solution, the rotary fixture can complete its rotation operation by connecting a geared motor to the drive shaft 7, eliminating the need for complex electronic control components to achieve speed regulation. This reduces the manufacturing cost and improves the reliability of the rotary fixture. Furthermore, the rotary fixture avoids interference with the welding torch 3 and allows for speed reduction at the end of the welding operation, enabling the fixture to rotate the component a full revolution and allowing for speed adjustment. This allows the component to complete the welding operation in one pass, improving welding quality.

[0035] The above are merely embodiments of the present invention. Commonly known structures and characteristics of the solutions are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A rotary clamp for processing motorcycle parts, comprising a frame, a rotating shaft rotatably connected to the frame, and a first fixed clamp statically connected to the rotating shaft; further comprising a second fixed clamp; characterized in that: The rotating shaft is statically connected to a support member, and a linkage frame is rotatably connected between the support member and the second fixed clamp, with the rotation axis of the linkage frame parallel to the axis of the rotating shaft; the linkage frame is provided with a groove for avoiding the welding torch; a drive shaft is rotatably connected to the frame, and a first gear set and a second gear set are provided between the drive shaft and the rotating shaft; the linkage frame is connected to an adjustment mechanism for switching the first gear set and the second gear set when the opening of the groove faces the opposite direction to the initial state.

2. The rotary fixture for processing motorcycle parts as described in claim 1, characterized in that: The adjustment mechanism includes a cylindrical cam and a slider that cooperate with each other. The cylindrical cam is statically connected to the linkage frame, and the rotation axis of the cylindrical cam is collinear with the rotation axis of the linkage frame. The slider is statically connected to both the first and second speed-changing gear sets.

3. The rotary fixture for processing motorcycle parts as described in claim 2, characterized in that: The first gear set includes a first driving gear and a first driven gear, and the second gear set includes a second driving gear and a second driven gear. The diameter of the first driving gear is smaller than the diameter of the second driving gear. The first driving gear is connected to the drive shaft via an overrunning clutch, and the second driving gear is statically connected to the drive shaft. Both the first and second driven gears are connected to a rotating shaft via a keyway. The first driven gear and the first driving gear are in axial sliding engagement, and the second driven gear and the second driving gear are in axial clutch engagement. The slider is statically connected to the second driven gear.

4. The rotary fixture for processing motorcycle parts as described in claim 3, characterized in that: The first driven gear and the second driven gear are configured as a double gear and are connected to the rotating shaft by a spline.

5. A rotary fixture for processing motorcycle parts as described in claim 4, characterized in that: The rotating shaft is equipped with a reset element for resetting the second driven gear.

6. The rotary fixture for processing motorcycle parts as described in claim 5, characterized in that: The reset component is a helical spring sleeved on the outside of the rotating shaft.

7. A rotary fixture for processing motorcycle parts as described in any one of claims 1 to 6, characterized in that: The linkage frame is statically connected to a gear ring, the axis of which is collinear with the rotation axis of the linkage frame. The frame is statically connected to an arc-shaped rack that mates with the gear ring, the center of which is collinear with the axis of the rotation axis, and the length of which is equal to half the circumference of the gear ring.

8. A rotary fixture for processing motorcycle parts as described in claim 7, characterized in that: The support member is a disc coaxial with the rotating shaft, and the arc-shaped rack is statically connected to a mounting bracket, which is rotatably connected to both the rotating shaft and the support member.

9. A rotary fixture for processing motorcycle parts as described in claim 8, characterized in that: The linkage frame is rotatably connected to the second fixing clamp and the support member respectively via bearings.

10. A rotary fixture for processing motorcycle parts as described in claim 9, characterized in that: The slider is slidably engaged with the cylindrical cam via ball bearings.

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