Motorcycle head welding tool
By designing a motorcycle front welding fixture with a cylinder linkage push rod and a multi-point constraint structure, the problems of inaccurate positioning and error superposition in the existing technology have been solved, achieving efficient and accurate welding positioning and fixing of the front, and adapting to the production needs of various front models.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-08
- Publication Date
- 2026-04-03
AI Technical Summary
In the existing welding process for motorcycle front ends, there are insufficient parts for positioning and fixing. This results in the accuracy of manual positioning being greatly affected by experience. The lack of multi-dimensional adaptive positioning function leads to component displacement caused by welding thermal deformation, resulting in cumulative errors and making it difficult to meet the efficiency and consistency requirements of mass production.
A welding fixture for motorcycle front end was designed. The fixture utilizes a push rod linked by a cylinder and a control valve to achieve self-centering positioning of a triangular plate. Combined with multi-point constraints from a limit rod and an adjustable pressure block, and through the cooperation of a conical structure and a quick clamp, it achieves multi-dimensional precise positioning and fixation, reducing local deformation.
It improves the positioning accuracy and welding consistency of the front components, reduces error accumulation, enhances production efficiency and applicability, and adapts to the adjustment needs of different front component models.
Smart Images
Figure CN224073709U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of welding fixtures and jigs, and in particular to a welding fixture for motorcycle front. Background Technology
[0002] Motorcycles, as a widely used motorized transportation tool, typically consist of a frame, power system, suspension system, and front assembly. The front assembly, as the core control unit of the entire vehicle, mainly comprises several components such as the steering column, front fork, handlebar mounts, instrument panel bracket, and light mounts. These components are assembled using methods such as welding and bolting to ensure precise steering control and riding stability. Welding, due to its advantages of high connection strength and structural integration, is widely used for fixing components in the front assembly, such as the joining of the steering column and front fork, and the positioning welding of the handlebar mounts and instrument panel brackets.
[0003] In existing technologies, the welding and assembly of the vehicle front assembly mainly relies on manual operation and simple tooling. Operators need to initially position each component according to a preset location, temporarily fix it using general-purpose fixtures, and then achieve permanent connection through spot welding or continuous welding. However, this process has significant limitations. The accuracy of manual positioning is greatly affected by the operator's experience, and repeated adjustments to the relative positions between components are required, resulting in low efficiency. It also lacks compatibility with simultaneous positioning of multiple components, which can easily lead to the accumulation of dimensional deviations between components after welding, affecting the overall vehicle assembly quality.
[0004] Further analysis revealed that the core deficiency in the existing front welding process lies in the inadequacy of component positioning and fixing. First, the front assembly involves the welding of multi-level and multi-angle irregularly shaped components, while traditional tooling lacks multi-dimensional adaptive positioning capabilities. Welding thermal deformation can easily cause local displacement of components, and the step-by-step clamping and welding process can easily lead to the accumulation of errors. Moreover, the adjustment is time-consuming, making it difficult to meet the consistency and efficiency requirements of mass production. Utility Model Content
[0005] To overcome the shortcomings of multi-station coordination deviation, this utility model provides a welding fixture for accurate positioning of the motorcycle front.
[0006] A welding fixture for a motorcycle front end includes a base plate and an air pipe. A mounting base is connected to the rear of the base plate. Two cylinders are mounted on the rear top surface of the mounting base. A control valve is mounted on the right rear end of the base plate. The control valve and the cylinders are connected via the air pipe. First fixing brackets are connected to the left and right sides of the center of the top surface of the mounting base. A push rod is connected to the piston rod of each cylinder. A first connecting bracket is slidably connected to the first fixing bracket. The first connecting bracket has a nut to limit its sliding. The push rod passes through the first fixing bracket and engages with the first connecting bracket. The front end is divided into three parts: a triangular plate, a center frame, and a handlebar. The push rod and the first connecting bracket clamp the triangular plate of the front end. A second fixing plate is connected to the center of the top surface of the mounting base. An adjusting screw is threaded onto the second fixing plate and contacts the triangular plate of the front end. A center frame clamping assembly for clamping the center frame of the front end is provided in the center of the base plate. A handlebar clamping assembly for clamping the handlebar is provided at the front of the base plate.
[0007] Furthermore, the mid-frame clamping assembly includes a first vertical quick clamp, a third fixed frame connected to the middle of the base plate, the top surface of the third fixed frame being inclined in coordination with the mid-frame of the vehicle head, a plurality of limiting rods connected to the top surface of the third fixed frame, the limiting rods being in limiting engagement with the mid-frame of the vehicle head, the first vertical quick clamp being connected to the front end of the third fixed frame, the first vertical quick clamp being slidably connected to a first adjustable pressure block, the first adjustable pressure block being in pressing engagement with the mid-frame of the vehicle head.
[0008] Furthermore, the grip clamping assembly includes a second vertical quick clamp and a fixing screw. The left and right sides of the front of the base plate are connected to a fourth fixing bracket. The second vertical quick clamp is installed on the top of the fourth fixing bracket. The second vertical quick clamp is slidably connected to a second adjustable pressure block. The front of the base plate is connected to a second connecting bracket through the fixing screw. The rear side of the second connecting bracket is connected to a third connecting bracket through the fixing screw. The top of the third connecting bracket and the second adjustable pressure block press against the end of the handlebar.
[0009] Furthermore, both the bottom surfaces of the first adjustable pressure block and the second adjustable pressure block are connected to rubber pads.
[0010] Furthermore, a tapered guide block is connected to the top of the limiting rod.
[0011] Furthermore, the handles of the first vertical quick clamp and the second vertical quick clamp are fitted with anti-slip sleeves.
[0012] This utility model has the following advantages:
[0013] 1. By controlling the valve and the cylinder in linkage, the push rod is pushed to slide along the first fixed frame. The tapered structure at the end of the push rod realizes the self-centering function of the triangular plate positioning hole. The ring at the end of the push rod forms a bidirectional rigid clamp with the first connecting frame, and the local deformation is reduced by evenly distributing pressure.
[0014] 2. The tapered guide block at the top of the limiting rod engages with the positioning hole of the central frame to achieve rapid centering. Combined with the downward pressure of the first vertical quick clamp driving the adjustable pressure block, multi-point constraints are formed in the longitudinal and transverse directions. The tapered rod of the second adjustable pressure block is inserted into the grip positioning hole and the round hole of the third connecting frame to achieve precise axial positioning. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0016] Figure 2 This is an exploded view showing the connection relationship between the first fixing frame and the top rod of this utility model.
[0017] Figure 3 This is a schematic diagram showing the connection relationship between the first vertical quick clamp and the first adjustable pressure block of this utility model.
[0018] Figure 4 This is a schematic diagram showing the connection relationship between the second connecting frame and the third connecting frame of this utility model.
[0019] In the attached diagrams: 1: base plate, 2: front of the vehicle, 3: control valve, 4: air pipe, 5: mounting base, 6: cylinder, 7: first fixed frame, 8: push rod, 9: first connecting frame, 10: second fixed plate, 101: adjusting screw, 11: third fixed frame, 12: limit rod, 13: first vertical quick clamp, 14: first adjustable pressure block, 15: fourth fixed frame, 16: second vertical quick clamp, 161: second adjustable pressure block, 17: second connecting frame, 18: third connecting frame, 19: fixing screw, 20: rubber pad, 21: guide block, 22: anti-slip sleeve. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] Example: A welding fixture for the front of a motorcycle, such as Figure 1 and Figure 2As shown, the assembly includes a base plate 1, a front end 2, a control valve 3, an air pipe 4, a mounting base 5, a cylinder 6, a first fixing bracket 7, a push rod 8, a first connecting bracket 9, a second fixing plate 10, an adjusting screw 101, a mid-frame clamping assembly, and a handle clamping assembly. The mounting base 5 is connected to the rear of the base plate 1. Two cylinders 6 are mounted on the rear top surface of the mounting base 5. The control valve 3 is mounted on the right rear end of the base plate 1. The control valve 3 is connected to the cylinders 6 via an air pipe 4. The first fixing bracket 7 is connected to both the left and right sides of the center of the top surface of the mounting base 5. The piston rod of the cylinder 6 is connected to a push rod 8. The first connecting bracket 9 is slidably connected to the first fixing bracket 7 via several round rods. The first connecting frame 9 has a nut at the end of the middle round rod to control its sliding stroke in the first fixed frame 7. The top rod 8 passes through the first fixed frame 7 and is pressed against the first connecting frame 9. The front of the vehicle 2 is divided into three parts: a triangular plate, a middle frame, and a handle. The top rod 8 and the first connecting frame 9 clamp the triangular plate of the front of the vehicle 2. The top surface of the mounting base 5 is connected to the middle of the second fixed plate 10. The second fixed plate 10 is threadedly connected to the adjusting screw 101. The adjusting screw 101 contacts the triangular plate of the front of the vehicle 2. The middle part of the base plate 1 is provided with a middle frame clamping assembly for clamping the middle frame of the front of the vehicle 2. The front part of the base plate 1 is provided with a handle clamping assembly for clamping the handle of the front of the vehicle 2.
[0022] like Figure 1 and Figure 3 As shown, the mid-frame clamping assembly includes a third fixed frame 11, a limiting rod 12, a first vertical quick clamp 13, and a first adjustable pressure block 14. The third fixed frame 11 is connected to the middle of the base plate 1. The top surface of the third fixed frame 11 is inclined to cooperate with the mid-frame of the head 2. Several limiting rods 12 are connected to the top surface of the third fixed frame 11. The limiting rods 12 are limited to the mid-frame of the head 2. The front end of the third fixed frame 11 is connected to the first vertical quick clamp 13. The first vertical quick clamp 13 is slidably connected to the first adjustable pressure block 14. The first adjustable pressure block 14 is pressed to the mid-frame of the head 2.
[0023] like Figure 1 and Figure 4As shown, the grip clamping assembly includes a fourth fixed frame 15, a second vertical quick clamp 16, a second adjustable pressure block 161, a second connecting frame 17, a third connecting frame 18, and a fixing screw 19. The fourth fixed frame 15 is connected to both the left and right sides of the front of the base plate 1. The second vertical quick clamp 16 is mounted on the top of the fourth fixed frame 15 and is slidably connected to the second adjustable pressure block 161. The second connecting frame 17 is connected to the front of the base plate 1 via the fixing screw 19, and the third connecting frame 18 is connected to the rear of the second connecting frame 17 via the fixing screw 19. The second connecting frame 17 has several threaded holes, allowing adjustment of its front-to-back position and the vertical position of the third connecting frame 18 via the fixing screw 19, thus providing a grip for different applications. The same front handle 2 can be adapted and adjusted. The top of the third connecting frame 18 presses the end of the front handle 2 against the second adjustable pressure block 161. The first vertical quick clamp 13 and the second vertical quick clamp 16 both adopt the multi-link principle. The adjustable pressure block is driven to rotate and lock its position through the hinge point. The end of the adjustable pressure block is rotated with nuts at both ends. When the screw is adjusted up and down, the adjustable pressure block is also adjusted. Moreover, when fixed by the nut, the adjustable pressure block can slide left and right on the crossbeam of the vertical quick clamp. Thus, the position of the adjustable pressure block can be adapted to the position adjustment of the third connecting frame 18, which also optimizes the applicability of the tooling. The bottom of the second adjustable pressure block 161 is connected to a tapered rod. The top of the third connecting frame 18 has a round hole, and the left and right ends of the handle have positioning holes.
[0024] like Figure 1 and Figure 3 As shown, it also includes a rubber pad 20. The bottom surfaces of the first adjustable pressure block 14 and the second adjustable pressure block 161 are both connected to the rubber pad 20. The rubber pad 20 compensates for the unevenness of the workpiece surface through elastic deformation, enhances the clamping stability, and prevents indentation.
[0025] like Figure 2 As shown, it also includes a guide block 21, and a tapered guide block 21 is connected to the top of the limiting rod 12. The tapered design of the guide block 21 simplifies the alignment process between the central frame and the limiting rod 12.
[0026] like Figure 3 and Figure 4 As shown, it also includes an anti-slip sleeve 22. The handles of the first vertical quick clamp 13 and the second vertical quick clamp 16 are fitted with anti-slip sleeves 22. The anti-slip sleeves 22 increase the friction when the operator holds the quick clamp handles, ensuring that the clamping action is stable and controllable.
[0027] Workers clamp and fix the three parts that make up the front of the vehicle 2, and then weld them together. When clamping and fixing the triangular plate of the front of the vehicle 2, the triangular plate is placed between the first connecting frame 9 and the first fixing frame 7, and the positioning hole of the triangular plate is aligned with the push rod 8. Then, by opening the control valve 3, gas enters the cylinder 6 along the air pipe 4, pushing the push rod 8 to slide along the first fixing frame 7. After passing through the positioning hole of the triangular plate, it forms a pressing fit with the first connecting frame 9. Since the end of the push rod 8 is set as a cone, and the push rod 8 is provided with a ring larger than the positioning hole of the triangular plate, the ring and the first connecting frame 9 press the front and rear sides of the triangular plate to complete the fixation. The ring increases the contact area of the clamping and optimizes the clamping effect. After fixing, the control valve 3 is closed to maintain the clamping state.
[0028] When fixing the middle frame of the front of the vehicle 2, the staff places the middle frame on the third fixing frame 11, and the positioning hole of the middle frame needs to pass through the limiting rod 12. Since the top of the limiting rod 12 is equipped with a guide block 21, it is easier to align the positioning hole of the middle frame when it is placed in. Then, the staff holds the handle of the first vertical quick clamp 13. The anti-slip sleeve 22 can optimize the grip. After pushing the handle, the first adjustable pressure block 14 rotates around the first vertical quick clamp 13 through the multi-link. The bottom of the first adjustable pressure block 14 presses against the middle of the top surface of the middle frame of the front of the vehicle 2. The first vertical quick clamp 13 can stabilize the position of the first adjustable pressure block 14, thereby ensuring the fixing effect of the middle frame. The rubber pad 20 at the bottom of the first adjustable pressure block 14 can protect the surface quality of the middle frame and optimize the clamping and fixing effect. After fixing, the rear end of the middle frame fits against the bottom of the triangular plate.
[0029] Finally, place both ends of the handle on the third connecting frame 18, align the positioning holes at both ends of the handle with the round holes of the third connecting frame 18, fit the rear end of the handle with the front side of the triangular plate, fit the middle extension rod of the handle with the left and right sides of the middle frame, rotate the handle of the second vertical quick clamp 16, and the tapered rod of the second adjustable pressure block 161 passes through the positioning hole of the handle and is inserted into the round hole of the third connecting frame 18. The rubber pad 20 at the bottom of the second adjustable pressure block 161 presses against the handle, thereby fixing the handle of the front of the vehicle 2.
[0030] After all three parts of the front of the car are fixed, welding is carried out. After welding is completed, all vertical quick clamps are rotated to disengage the adjustable pressure block from the front of the car. The control valve 3 is opened to extract the gas from the cylinder 6 through the air pipe 4. The push rod 8 is disengaged from the front of the car. The worker can then lift the welded front of the car upwards.
[0031] It should be understood that this embodiment is for illustrative purposes only and is not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.
Claims
1. A welding fixture for the front of a motorcycle, characterized in that: The system includes a base plate (1) and an air pipe (4). A mounting base (5) is connected to the rear of the base plate (1). Two cylinders (6) are mounted on the rear top surface of the mounting base (5). A control valve (3) is installed on the right rear end of the base plate (1). The control valve (3) and the cylinders (6) are connected through the air pipe (4). A first fixing bracket (7) is connected to the left and right sides of the top center of the mounting base (5). A push rod (8) is connected to the piston rod of the cylinder (6). A first connecting bracket (9) is slidably connected to the first fixing bracket (7). The first connecting bracket (9) is provided with a nut to limit its sliding. The push rod (8) passes through the first fixing bracket. The frame (7) is pressed together with the first connecting frame (9). The front of the vehicle (2) is divided into three parts: a triangular plate, a middle frame, and a handle. The top rod (8) and the first connecting frame (9) clamp the triangular plate of the front of the vehicle (2). The top surface of the mounting base (5) is connected to a second fixing plate (10). The second fixing plate (10) is threadedly connected to an adjusting screw (101). The adjusting screw (101) contacts the triangular plate of the front of the vehicle (2). The middle part of the base plate (1) is provided with a middle frame clamping assembly for clamping the middle frame of the front of the vehicle (2). The front part of the base plate (1) is provided with a handle clamping assembly for clamping the handle of the front of the vehicle (2).
2. A welding fixture for a motorcycle front end according to claim 1, characterized in that: The mid-frame clamping assembly includes a first vertical quick clamp (13), a third fixed frame (11) is connected to the middle of the base plate (1), the top surface of the third fixed frame (11) is inclined to cooperate with the mid-frame of the car head (2), a plurality of limiting rods (12) are connected to the top surface of the third fixed frame (11), the limiting rods (12) are limited to the mid-frame of the car head (2), the front end of the third fixed frame (11) is connected to the first vertical quick clamp (13), the first vertical quick clamp (13) is slidably connected to a first adjustable pressure block (14), the first adjustable pressure block (14) is pressed to the mid-frame of the car head (2).
3. A welding fixture for a motorcycle front end according to claim 2, characterized in that: The grip clamping assembly includes a second vertical quick clamp (16) and a fixing screw (19). The front left and right sides of the base plate (1) are connected to a fourth fixing frame (15). The second vertical quick clamp (16) is installed on the top of the fourth fixing frame (15). The second vertical quick clamp (16) is slidably connected to a second adjustable pressure block (161). The front of the base plate (1) is connected to a second connecting frame (17) through the fixing screw (19). The rear side of the second connecting frame (17) is connected to a third connecting frame (18) through the fixing screw (19). The top of the third connecting frame (18) and the second adjustable pressure block (161) press against the end of the handlebar of the front of the vehicle (2).
4. A welding fixture for a motorcycle front end according to claim 3, characterized in that: The bottom surfaces of the first adjustable pressure block (14) and the second adjustable pressure block (161) are both connected to rubber pads (20).
5. A welding fixture for a motorcycle front end according to claim 4, characterized in that: The top of the limiting rod (12) is connected to a tapered guide block (21).
6. A welding fixture for a motorcycle front end according to claim 5, characterized in that: The handles of the first vertical quick clip (13) and the second vertical quick clip (16) are fitted with anti-slip sleeves (22).