A general fixing fixture for a motorcycle frame

Abstract

The present invention provides a general fixing jig for a motorcycle frame, comprising: a base; a first fixing device disposed at one end of the base, the first fixing device including a positioning and clamping member; a second fixing device fixed to the base and spaced apart from the first fixing device, the second fixing device including a supporting member; a third fixing device disposed between the first fixing device and the second fixing device, the third fixing device including an eccentric control member, a supporting member mounted on the base, and a clamping member, the supporting member being provided with a supporting groove for supporting the body of the motorcycle frame, the clamping member including a fixing portion and a movable clamping portion, the movable clamping portion having a locking position and an unlocking position, when the movable clamping portion is in the locking position, a fixing space for clamping the motorcycle frame is formed between the fixing portion and the movable clamping portion, and the eccentric control member is connected to the movable clamping portion and drives the movable clamping portion to move between the locking position and the unlocking position. It realizes the clamping and fixing of various motorcycle frames and improves the utilization rate of jigs on the production line.

Description

Technical Field

[0001] This application belongs to the field of machining technology, and particularly relates to a general fixture for fixing a motorcycle frame. Background Art

[0002] The motorcycle frame is the backbone of a motorcycle, which organically connects components such as the engine, transmission part, running part, and control part together to form a whole during subsequent processing. Motorcycle frames include scooter frames, cruiser frames, and step-through frames. During the production and processing of motorcycles, it is necessary to first fix the motorcycle frame on a fixture. In existing production lines, both cruiser motorcycles and step-through motorcycles clamp and fix the front and rear sides of the frame, and can share the same production line for clamping. However, for scooter motorcycles, they cannot be directly clamped and fixed, and a new production line needs to be set up separately, increasing production costs and affecting production efficiency.

[0003] It should be noted that the above content belongs to the technical knowledge scope of the inventor and does not necessarily constitute prior art. Summary of the Invention

[0004] Aiming at the deficiencies in the prior art, the present invention provides a general fixture for fixing a motorcycle frame to solve technical problems such as the small adaptation range and non-universality of traditional fixtures, and improve the utilization rate of the fixture and the production efficiency of motorcycles.

[0005] To solve the above problems, the present invention provides a general fixture for fixing a motorcycle frame, including: a base; a first fixing device disposed at one end of the base, the first fixing device including a positioning and clamping member that can clamp and define the front riser portion of the frame; a second fixing device fixed to the base and spaced from the first fixing device, the second fixing device including a supporting member, and a transverse supporting portion for supporting the tail of the frame is formed at the top of the supporting member; a third fixing device disposed between the first fixing device and the second fixing device, the third fixing device including an eccentric control member, a supporting member installed on the base, and a clamping member. The supporting member is provided with a supporting groove for supporting the body of the frame. The clamping member includes a fixed portion and a movable clamping portion. The movable clamping portion has a locking position and an unlocking position. When the movable clamping portion is in the locking position, a fixing space for clamping the frame is formed between the fixed portion and the movable clamping portion. The eccentric control member is connected to the movable clamping portion and drives the movable clamping portion to move between the locking position and the unlocking position.

[0006] Further, the third fixing device includes a linkage control assembly, which includes a connecting rod, a contact member, and an eccentric control member. The eccentric control member includes a connected stationary area and an eccentric rotation area. One end of the connecting rod is connected to the movable clamping portion, and the other end is hinged to the stationary area. The contact member is fixed to the base and is provided with a transverse sliding groove for the connecting rod to pass through. When the eccentric control member rotates around the connecting rod, the eccentric rotation area abuts against the contact member, and the eccentric control member moves along the edge of the eccentric rotation area, so that the connecting rod reciprocates along the length direction of the transverse sliding groove.

[0007] Further, the linkage control assembly further includes a locking member. The connecting rod is provided with a fixed card slot. When the movable clamping portion is in the locked position, the locking member can move to the fixed card slot to stop the connecting rod.

[0008] Further, a locking spring is installed on the locking member. A traction wire is connected between the locking member and the eccentric control member. When the eccentric control member drives the movable clamping portion to rotate from the locked position to the unlocked position, the traction wire is tensioned and drives the locking member out of the fixed card slot, and the locking spring is in a compressed state; when the eccentric control member drives the movable clamping portion to rotate from the unlocked position to the locked position, the traction wire is in a relaxed state, and the locking spring drives the locking member to move into the fixed card slot.

[0009] Further, an installation block is provided at the bottom of the contact member. The contact member and the installation block are both provided with guide grooves. The locking member is a locking block. The locking spring is arranged in the guide groove and is connected to the bottom of the locking block. The locking block can move through the guide groove to the fixed card slot.

[0010] Further, the eccentric rotation area is placed below the stationary area. When the movable clamping portion is in the unlocked position, the stationary area abuts against the contact member.

[0011] Further, a return spring is provided between the connecting rod and the contact member.

[0012] Further, the third fixing device further includes a protection spring, which is connected to the fixing portion and the eccentric control member respectively.

[0013] Further, the opening end of the support groove is arranged horizontally, and a sliding platform extends from the bottom of the support groove to one side of the opening end.

[0014] Further, the eccentric control member includes an eccentric control portion and a control handle. The control handle is connected to the eccentric control portion and drives the eccentric control portion to rotate, and the eccentric control portion is connected to the movable clamping portion.

[0015] The beneficial effects of the present invention are as follows. By jointly clamping the front and rear ends of a cross - motorcycle frame or a step - through motorcycle frame with the first fixing device and the second fixing device, the third fixing device holds and clamps the left and right ends of the scooter frame through the support member and the clamping member. The eccentric control member drives the movable clamping portion to move, and the movable clamping portion cooperates with the fixed portion to clamp and fix the frame. The structure is simple and the operation is convenient, greatly improving the utilization rate of the fixture and the production efficiency of the motorcycle, and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present application and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 It is a front - view structural schematic diagram when the movable clamping portion of the present invention is in the locked position.

[0018] Figure 2 is Figure 1 a cross - sectional view of the illustrated embodiment with the third fixing device removed.

[0019] Figure 3 It is a three - dimensional structural schematic diagram of the present invention for clamping a scooter frame.

[0020] Figure 4 It is a front - view structural schematic diagram of a partial structure when the movable clamping portion of the present invention is in the unlocked position.

[0021] Figure 5 is Figure 2 a partial enlarged schematic diagram at position A in the illustrated embodiment.

[0022] Figure 6 It is a three - dimensional structural schematic diagram with the third fixing device removed.

[0023] Figure 7 It is a three - dimensional structural schematic diagram of the present invention for clamping a cross - motorcycle frame.

[0024] Among them, 10, base; 20, positioning clamping member; 30, supporting member; 401, eccentric control member; 4011, stationary area; 4012, eccentric rotation area; 403, control handle; 402, connecting rod; 4021, fixed card slot; 404, abutting member; 405, locking member; 406, locking spring; 407, traction wire; 50, support member; 501, support groove; 502, sliding platform; 60, clamping member; 601, fixed portion; 602, movable clamping portion; 70, protection spring; 80, return spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To more clearly illustrate the overall concept of this application, the following provides a detailed description by way of example in conjunction with the accompanying drawings of the specification.

[0026] In the following description, numerous specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited by the specific embodiments disclosed below.

[0027] In addition, in the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are merely for facilitating the description of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention.

[0028] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0030] In the present invention, as Figure 1-7As shown in the figure, the present invention provides a general fixing fixture for a motorcycle frame, comprising: a base 10; a first fixing device provided at one end of the base 10, the first fixing device including a positioning and clamping member 20 which can clamp and define the front riser part of the frame; a second fixing device fixed to the base 10 and spaced from the first fixing device, the second fixing device including a supporting member 30, and a transverse supporting part for supporting the tail of the frame is formed at the top of the supporting member 30; a third fixing device provided between the first fixing device and the second fixing device, the third fixing device including an eccentric control member 401, a supporting member 50 installed on the base 10 and a clamping member 60, a supporting groove 501 for supporting the body of the frame is provided on the supporting member 50, the clamping member 60 includes a fixed part 601 and a movable clamping part 602, the movable clamping part 602 has a locking position and an unlocking position, when the movable clamping part 602 is in the locking position, a fixing space for clamping the frame is formed between the fixed part 601 and the movable clamping part 602, and the eccentric control member 401 is connected to the movable clamping part 602 and drives the movable clamping part 602 to move between the locking position and the unlocking position.

[0031] A plurality of general fixing fixtures are installed on the motorcycle production line. The base 10 is fixedly installed on the moving production line. The base 10 can be a fixed plate or other forms. The first fixing device and the second fixing device are installed at both ends of the base 10. For fixing a straddle motorcycle and a step-through motorcycle, as Figure 7 shown, the riser part at the front end of its frame is clamped and fixed by the positioning and clamping member 20, including a support front riser applicable to a step-through frame and a support U-groove applicable to a straddle frame. The tail of the frame is lifted and fixed by the supporting member 30 in the second fixing device, so as to realize the fixing of the frames of these two types of motorcycles, facilitating the subsequent next-step assembly and processing of the frames.

[0032] The third fixing device is provided between the first fixing device and the second fixing device. For the frame of a scooter, the height difference between its front and rear ends is relatively large, and there are two relatively gentle cross beams arranged oppositely in the part where the pedal is installed in the middle. As Figure 3 shown, the third fixing device is used to fix the frame of the scooter. One of the cross beams is placed in the supporting groove 501 of the supporting member 50, and the other cross beam is placed between the fixed part 601 and the movable clamping part 602. The eccentric control member 401 drives the movable clamping part 602 to move towards the fixed part 601 side through eccentric movement, so that the movable clamping part 602 moves from the unlocking position to the locking position, and a fixing space for clamping the cross beam is formed between the fixed part 601 and the movable clamping part 602. After the processing of the frame of the scooter is completed, the eccentric control member 401 drives the movable clamping part 602 to move from the locking position to the unlocking position again, facilitating the staff to remove the frame from the production line.

[0033] In the present invention, the first fixing device and the second fixing device jointly clamp the front and rear ends of a cross-riding motorcycle frame or a bent-beam motorcycle frame. The sleeve of the frame riser part is sleeved on the front riser part. In this way, the first fixing device realizes the positioning of the front end of the frame, and the supporting member 30 of the second fixing device provides a supporting force for the rear end of the frame, realizing the horizontal restriction of the frame and providing a stable working environment for the subsequent assembly and processing of various components of the frame. The third fixing device supports and clamps the left and right cross beams of the scooter frame through the supporting member 50 and the clamping member 60. The eccentric rotation of the eccentric control member 401 drives the movable clamping part 602 to move. The movable clamping part 602 and the fixed part 601 form a U-shaped jaw, and the two cooperate to clamp and fix the frame. The structure is simple and the operation is convenient. Installing a general motorcycle frame fixing device on a production line to realize the clamping and fixing of various motorcycle frames greatly improves the utilization rate of the fixtures on the production line, can process different types of motorcycles simultaneously according to actual production requirements, improves the production efficiency of motorcycles, and reduces the production cost.

[0034] It should be noted that in the present invention, the front and rear ends refer to Figure 7 the front and rear ends of the bent-beam motorcycle in the illustrated embodiment, and the left and right ends refer to Figure 3 the left and right ends of the scooter in the illustrated embodiment, and the horizontal direction refers to Figure 1 the lateral direction in the fixed fixture in the illustrated embodiment.

[0035] Furthermore, for a fixing and clamping method of the clamping member, the third fixing device includes a linkage control assembly. The linkage control assembly includes a connecting rod 403, an abutting member 404, and an eccentric control member 401. The eccentric control member 401 includes a connected stationary area 4011 and an eccentric rotation area 4012. One end of the connecting rod 403 is connected to the movable clamping part 602, and the other end is hinged to the stationary area 4011. The abutting member 404 is fixed to the base 10 and is provided with a horizontal sliding groove for the connecting rod 403 to pass through. When the eccentric control member 401 rotates around the connecting rod 403, the eccentric rotation area 4012 abuts against the abutting member 404, and the eccentric control member 401 moves along the edge of the eccentric rotation area 4012, so that the connecting rod 403 reciprocates along the length direction of the horizontal sliding groove.

[0036] The connecting rod 403 is horizontally arranged in the horizontal direction. As Figure 1 shown in the front view, its left end is fixed at the bottom of the movable clamping part 602, and its right end passes through the horizontal sliding groove of the abutting member 404 and is hinged to the stationary area 4011 of the eccentric control member 401. The distance from the right end of the connecting rod 403 to the edge of the eccentric rotation area 4012 is greater than the distance from the edge of its stationary area 4011. Moreover, in one embodiment, as Figure 5As shown, the distance from the right end of the connecting rod 403 to the edge of the eccentric rotation area 4012 gradually increases. When the movable clamping part 602 is in the unlocked position, the edge of the stationary area 4011 abuts against the abutting part 404. During the locking process, the eccentric rotation area 4012 gradually abuts against the abutting part 404, the eccentric control part 401 rotates around the contact point with the abutting part 404 and moves to the right, and the eccentric control part 401 rotates relative to the right end of the connecting rod 403 and drives the connecting rod 403 to move to the right, so that the movable clamping part 602 on the connecting rod 403 moves from the unlocked position on the left to the locked position on the right. After the frame of the scooter is processed, the eccentric control part 401 rotates in the reverse direction to unlock the frame. This method has a simple structure, and the movable clamping part 602 moves smoothly horizontally during the unlocking and locking processes, which can be achieved by rotating the eccentric control part 401, facilitating the operation of the staff.

[0037] In addition to the above embodiments, alternative embodiments also include the following two forms. One is that a linkage rod is hinged on the turntable, one end of the linkage rod is connected with a horizontally arranged slider, the slider moves in the chute, and a movable clamping part is installed on the slider. By rotating the turntable, the linkage rod moves left and right, so that the movable clamping part moves between the locked position and the unlocked position; Another alternative embodiment is that the eccentric control part is set in the form of a cam, the movable clamping part is arranged on a cross bar, one end of the cross bar is provided with a roller, the roller is in rolling connection with the cam, and a vertically arranged fixed rod is arranged on the base, and a horizontal spring is connected between the cross bar and the fixed rod, which can also drive the movable clamping part to move horizontally.

[0038] More specifically, in order to prevent the movable clamping part 602 from accidentally touching the frame during the production process or after the movable clamping part 602, resulting in unstable clamping of the frame by the third fixing device, the linkage control assembly further includes a locking part 405, as Figure 2 shown, the connecting rod 403 is provided with a fixed clamping groove 4021. When the movable clamping part 602 is in the locked position, the locking part 405 can move to the fixed clamping groove 4021 to stop the connecting rod 403. The locking part 405 can move vertically or horizontally, and its moving mode is not limited. After it enters the fixed clamping groove 4021, the locking part 405 remains fixed relative to the base 10 to prevent the connecting rod 403 from driving the movable clamping part 602 to move horizontally, ensuring the clamping and fixing effect of the third fixing device on the frame and making the frame more stable.

[0039] As a preferred embodiment, as Figure 2 、 3As shown in Figures 4 and 5, a locking spring 406 is installed on the locking member 405. A traction wire 407 is connected between the locking member 405 and the eccentric control member 401. When the eccentric control member 401 drives the movable clamping portion 602 to rotate from the locking position to the unlocking position, the traction wire 407 is tensioned and drives the locking member 405 to move out of the fixed card slot 4021, and the locking spring 406 is in a compressed state. When the eccentric control member 401 drives the movable clamping portion 602 to rotate from the unlocking position to the locking position, the traction wire 407 is in a relaxed state, and the locking spring 406 drives the locking member 405 to move into the fixed card slot 4021. When the movable clamping portion 602 moves from the unlocking position to the locking position, the eccentric control member 401 drives the traction wire 407 to change from a tensioned state to a relaxed state. The locking spring 406 gradually recovers from the compressed state and pushes the locking member 405 to move towards the fixed groove direction to fix the connecting rod 403. During the unlocking process, the eccentric control member 401 drives the traction wire 407 to gradually change from a relaxed state to a tensioned state. During this process, the traction wire 407 drives the locking member 405 to move away from the fixed card slot 4021, so that the connecting rod 403 can move to the left without being blocked by the locking member 405, and the locking spring 406 is compressed again, facilitating the subsequent driving of the locking member 405 to repeat the above process. In this way, the lateral movement of the connecting rod 403 and the clamping and fixing of the locking member 405 are realized simultaneously by the rotation of the eccentric control member 401, enabling the staff to control the lateral movement of the movable clamping portion 602 and the fixed movement of the locking member 405 through a single action linkage. The structure is ingenious, the operation is simple, the linkage effect is good, and it is beneficial to improve production efficiency.

[0040] It should be further noted that, as Figure 5 shown, an installation block is provided at the bottom of the abutting member 404. The abutting member 404 and the installation block are both provided with guiding grooves. The locking member 405 is a locking block. The locking spring 406 is arranged in the guiding groove and connected to the bottom of the locking block. The locking block can move through the guiding groove into the fixed card slot 4021. The guiding groove can guide the up and down movement of the locking block, protect the locking block when it moves into the guiding groove, and accommodate the locking spring 406 to provide a stable supporting effect during the movement of the locking member 405.

[0041] In the present invention, the abutting member 404 can be selected to have a block-shaped or columnar structure. The abutting member 404 and the fixed portion 601 are jointly fixed on the base 10. As Figure 4 shown, a limiting protrusion extending towards the abutting member 404 is provided on one side of the static area 4011 of the eccentric control member 401. The limiting protrusion can abut against the top surface or the bottom surface of the abutting member 404 to prevent the eccentric control member 401 from rotating too large an angle and play a certain protective role.

[0042] As a preferred implementation mode, as Figure 1 、2 As shown in FIG. 4, the eccentric rotation area 4012 is placed below the stationary area 4011. When the movable clamping part 602 is in the unlocked position, the stationary area 4011 abuts against the abutting part 404. In this way, when the eccentric control part 401 rotates clockwise, the movable clamping part 602 moves from the unlocked position to the locked position. Relying on the self-gravity of the eccentric control part 401, it can drive the movable clamping part 602 to move more quickly and smoothly, improving the fixing speed of the vehicle frame. In addition, the eccentric control part 401 includes an eccentric control part and a control handle 403. The control handle 403 is connected to the eccentric control part and drives the eccentric control part to rotate. The eccentric control part is connected to the movable clamping part 602. The eccentric control part is similar to a plate-like structure. An eccentric rotation area 4012 and a stationary area 4011 are provided on the eccentric control part. One end of the traction wire 407 is installed on the control handle 403. When the eccentric rotation area 4012 is set below the stationary area 4011, when the movable clamping part 602 is in the locked position, the control handle 403 faces downward, avoiding accidental contact with the operating handle during the subsequent operation and installation process of the vehicle frame, causing the movable clamping part 602 to move, and improving the clamping stability of the third fixing device.

[0043] Preferably, when the control handle 403 is lifted by 45°, the locking block is driven to move downward and out of the fixed card slot through the traction wire 407, so that the connecting rod 403 can move freely. The connecting rod 403 drives the movable clamping part 602 to move leftward by 23 mm, and the distance between the fixed part 601 and the movable clamping part 602 is the largest, and the pedal vehicle body can be placed or taken.

[0044] It should be further noted that, as Figure 5 shown, a return spring 80 is provided between the connecting rod 403 and the abutting part 404. In order to enable the movable clamping part 602 to quickly move to the unlocked position during the unlocking process, so that there is enough space between the movable clamping part 602 and the fixed part 601 to facilitate the subsequent movement of the vehicle frame and the installation of a new vehicle frame, a vertical protrusion is provided on the connecting rod 403 opposite to the abutting part 404. The return spring 80 is sleeved on the connecting rod 403, and one end abuts against the vertical protrusion, and the other end abuts against the vertical plane of the abutting part 404. When the movable clamping part 602 is in the locked position, the return spring 80 is in a compressed state. Of course, the connection method of the return spring 80 with the connecting rod 403 and the abutting part 404 is not limited to one kind.

[0045] In some embodiments, as Figure 1 shown, in order to improve the stability of the eccentric control part 401 during rotation, the third fixing device further includes a protection spring 70. The protection spring 70 is respectively connected to the fixed part 601 and the eccentric control part 401. During the rotation of the eccentric control part 401, the protection spring 70 plays a role in pulling and protecting the eccentric control part 401.

[0046] Further, as Figure 6 shown, the fixing part 601 is fixedly connected to the base 10. A groove facing the horizontal direction is provided at the top of the fixing part 601. There are two relatively arranged grooves. The movable clamping part 602 is arranged between the two grooves. The opening end of the supporting groove 501 is also horizontally arranged along the horizontal direction. A sliding platform 502 extends from the bottom of the supporting groove 501 to the side of the opening end. Similarly, the fixing part 601 can also be provided with a sliding platform 502. During installation, the cross beam of the vehicle frame can be first placed on the sliding platforms 502 of the supporting member 50 and the fixing part 601. At this time, the movable clamping part 602 is between the supporting member 50 and the fixing part 601. When it moves towards the locking position, it drives the cross beam of the vehicle frame to move along the sliding platform 502 into the supporting groove 501, that is, to move to the right, which can facilitate the installation of the vehicle frame.

[0047] In the present invention, the parts not described can be realized by adopting or referring to the existing technologies.

[0048] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0049] The above are only the embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A general fixing fixture for a motorcycle frame, characterized in that, Comprising: Base; A first fixing device is arranged at one end of the base. The first fixing device includes a positioning and clamping member, and the positioning and clamping member can clamp and define the front riser part of the vehicle frame. The positioning and clamping member includes a support front riser applicable to a bent-beam vehicle frame and a support U-shaped groove applicable to a straddle vehicle frame; A second fixing device is fixed to the base and is arranged at an interval from the first fixing device. The second fixing device includes a supporting member, and a transverse supporting part for supporting the tail of the vehicle frame is formed at the top of the supporting member; The front and rear ends of a straddle motorcycle vehicle frame or a bent-beam motorcycle vehicle frame are jointly clamped by the first fixing device and the second fixing device; A third fixing device is arranged between the first fixing device and the second fixing device. The third fixing device includes an eccentric control member, a supporting member installed on the base and a clamping member. The third fixing device supports and clamps the left and right cross beams of a scooter vehicle frame through the supporting member and the clamping member. The supporting member is provided with a supporting groove for supporting the body of the vehicle frame. The clamping member includes a fixed part and a movable clamping part. The movable clamping part has a locking position and an unlocking position. When the movable clamping part is in the locking position, a fixed space for clamping the vehicle frame is formed between the fixed part and the movable clamping part. The eccentric control member is connected to the movable clamping part and drives the movable clamping part to move between the locking position and the unlocking position; The opening end of the supporting groove is arranged horizontally, and a sliding platform extends from the bottom of the supporting groove to one side of the opening end; The third fixing device includes a linkage control assembly. The linkage control assembly includes a connecting rod, a contact member and the eccentric control member. The eccentric control member includes a connected stationary area and an eccentric rotating area. One end of the connecting rod is connected to the movable clamping part, and the other end is hinged to the stationary area. The contact member is fixed to the base and is provided with a transverse sliding groove for the connecting rod to pass through. When the eccentric control member rotates around the connecting rod, the eccentric rotating area abuts against the contact member, and the eccentric control member moves along the edge of the eccentric rotating area, so that the connecting rod reciprocates along the length direction of the transverse sliding groove; The linkage control assembly further includes a locking member. The connecting rod is provided with a fixed clamping groove. When the movable clamping part is in the locking position, the locking member can move to the fixed clamping groove to stop the connecting rod; The locking member is installed with a locking spring. A traction wire is connected between the locking member and the eccentric control member. When the eccentric control member drives the movable clamping part to rotate from the locking position to the unlocking position, the traction wire is tensioned and drives the locking member to move out of the fixed clamping groove, and the locking spring is in a compressed state; When the eccentric control member drives the movable clamping part to rotate from the unlocking position to the locking position, the traction wire is in a relaxed state, and the locking spring drives the locking member to move into the fixed clamping groove; The eccentric control member includes an eccentric control portion and a control handle. The control handle is connected to the eccentric control portion and drives the eccentric control portion to rotate. The eccentric control portion is connected to the movable clamping portion. One end of the traction wire is mounted on the control handle.

2. The universal fixing jig for a motorcycle frame according to claim 1, wherein, An installation block is provided at the bottom of the abutting member. The abutting member and the installation block are both provided with guiding grooves. The locking member is a locking block. The locking spring is disposed in the guiding groove and connected to the bottom of the locking block. The locking block can move through the guiding groove to the fixed card slot.

3. The universal fixing fixture for a motorcycle frame according to claim 1, wherein The eccentric rotation area is located below the static area. When the movable clamping portion is in the unlocking position, the static area abuts against the abutting member.

4. The general fixing fixture for a motorcycle frame according to claim 1, characterized in that, A return spring is provided between the connecting rod and the abutting member.

5. The general fixing jig for a motorcycle frame according to claim 1, characterized in that, The third fixing device further includes a protection spring, and the protection spring is connected to the fixing portion and the eccentric control member respectively.

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