Motorcycle handlebar upright tube and lug welding fixture

Abstract

This utility model relates to a welding fixture for motorcycle handlebar uprights and lugs, comprising: a base plate, a reference base, an upright base, a handlebar base, a front lug base, and a rear lug base. The base plate is a rectangular medium-thick plate. The reference base is a stepped cylinder fixed in the middle of the base plate. The upright base is fixed to the rear side of the reference base. It includes: a support I, a cylinder I, and a pressure head I. Two handlebar bases are symmetrically installed on both sides of the reference base. They include: a support II, a cylinder II, and a pressure head II. Two front lug bases are symmetrically fixed to the front sides of the reference base. They include: a support III, a positioning pin I, a cylinder III, and a pressure head III. Two rear lug bases are symmetrically fixed to the rear sides of the reference base. They include: a support IV, a positioning pin II, a cylinder IV, and a pressure head IV. The beneficial technical effect of this utility model is that it can accurately position and clamp components such as the upright and lugs in one operation, effectively improving welding efficiency and ensuring welding quality.

Description

Technical Field

[0001] This utility model relates to a welding technology for the vertical tube and lug of a motorcycle handlebar, and particularly to a welding fixture for the vertical tube and lug of a motorcycle handlebar. Background Technology

[0002] Motorcycle handlebars typically consist of a welded assembly of a curved tube and a vertical tube. The curved tube is U-shaped, with its base usually curved or straight, and both ends extending outward, backward, or upward in straight or curved directions, forming a symmetrical three-dimensional structure with the midpoint of the U-shaped base as the symmetry point. The vertical tube connects to the front wheel bracket to enable directional control of the motorcycle. In addition to welding the curved and vertical tubes together, a base needs to be welded to the bottom of the vertical tube for connection to the front wheel bracket. Furthermore, to facilitate the connection of other components on the handlebars (mainly decorative covers), several lugs need to be welded to both sides of the handlebars for secure installation of these components (see Appendix). Figure 1 In the diagram, a is a bent pipe, b is a vertical pipe, c is a base, d is a front support lug, and e is a rear support lug. Of course, the welding of the base and the support lugs each has its own technical requirements. For example, the raised step of the base must be at an angle α degrees to the plane of symmetry (see Appendix). Figure 2 ), requiring the support plane to be at an angle of β degrees to the horizontal plane, etc. Here, the symmetry plane of the direction refers to the symmetry plane of the three-dimensional structure of the standard direction handle.

[0003] Existing methods for welding motorcycle handlebar stems and lugs typically involve welding the handlebars and related components one by one using simple clamps. For example, the stem and base are welded together first, then the bend is welded to the stem, and finally the lugs are welded. Clearly, this method requires multiple clamping and positioning of the relevant components on the motorcycle handlebars, which is not only time-consuming and labor-intensive but also makes it difficult to guarantee welding quality. Summary of the Invention

[0004] To address the aforementioned problems, this utility model proposes a welding fixture for the vertical tube and lugs of a motorcycle handlebar.

[0005] This utility model relates to a welding fixture for a motorcycle handlebar upright tube and lugs, comprising: a base plate, a reference base, an upright tube base, a handlebar base, a front lug base, and a rear lug base; the base plate is a rectangular medium-thick plate; the reference base is a stepped cylinder fixed in the middle of the base plate; and the diameter of the cylinder matches the inner diameter of the upright tube, a notch is provided on one side of the step, the size and shape of the notch matching the convex step of the base and forming an angle α with the symmetry plane of the handlebar; the upright tube base is fixed to the rear side of the reference base; and includes: a support I, a cylinder I, and a pressure head I; the support I is L-shaped and fixed upside down to the rear side of the reference base; the piston of the cylinder I is fixed downwards to the support. The piston is coaxial with the reference seat on seat I; the end of the pressure head I is semi-circular and fixed to the piston end of cylinder I, and its semi-circular end matches the middle of the bend; there are two handle seats, which are symmetrically installed on both sides of the reference seat; including: support II, cylinder II and pressure head II; support II is a cuboid, and its surface is inclined with a semi-circular groove that matches the end of the bend; the piston of cylinder II is fixed upward on the rear side of support II; the pressure head II is L-shaped and fixed to the piston end of cylinder II; there are two front support lugs, which are symmetrically fixed on both sides of the front side of the reference seat; including: support III, positioning post I, cylinder III and pressure head III; support III is a cuboid The support has a surface that is inclined at a degree β with respect to the horizontal plane, and an inclined step is provided on its rear side. The positioning post I is located on the front side of the surface of the support III, and its size matches the through hole of the lug. The piston of the cylinder III is fixed upward on the inclined step of the support III. The pressure head III is L-shaped and fixed to the piston end of the cylinder III. There are two rear lug seats, which are symmetrically fixed on both sides of the rear side of the reference seat. The support includes: support IV, positioning post II, cylinder IV and pressure head IV. The support IV is a cuboid with a surface that is inclined at a degree β with respect to the horizontal plane, and an inclined step is provided on its rear side. The positioning post II is located on the front side of the surface of the support IV, and its size matches the through hole of the lug. Matching; the piston of cylinder IV is fixed upward on the inclined step of support IV; the pressure head IV is L-shaped and fixed to the piston end of cylinder IV; wherein, the fixed position and height of the reference seat and handlebar seat are such that when the curved end of the standard motorcycle handlebar is placed in the semi-circular groove of the handlebar seat and the vertical tube is inserted into the reference seat, the bottom of the curved tube is in close contact with the upper end of the vertical tube and the posture formed by the curved tube and the vertical tube meets the design requirements; the fixed position and height of support III and support IV are such that the front support lug and the rear support lug are respectively fitted on positioning post I and positioning post II, and when they are clamped by pressure head III and pressure head IV, the position of each support lug meets the design requirements.

[0006] Furthermore, the pressure head II is a length-adjustable bolt structure.

[0007] Furthermore, blind holes are provided on the pressing surfaces of the pressure head III and pressure head IV, and the size of the blind holes matches that of the positioning post I and positioning post II, respectively.

[0008] The beneficial technical effect of this utility model of welding fixture for motorcycle handlebar uprights and lugs is that it can accurately position and clamp the uprights and lugs and other components in one go, which effectively improves welding efficiency and ensures welding quality. Attached Figure Description

[0009] Appendix Figure 1 This is a 3D schematic diagram of the motorcycle handlebar upright and lugs before and after welding.

[0010] Appendix Figure 2 This is a planar schematic diagram showing the convex step of the base and its orientation, which makes the plane of symmetry α degrees.

[0011] Appendix Figure 3 This is a three-dimensional schematic diagram of the welding fixture for the motorcycle handlebar upright tube and support lugs according to the present invention.

[0012] Appendix Figure 4 This is a three-dimensional schematic diagram of the vertical tube seat of this utility model;

[0013] Appendix Figure 5 This is a three-dimensional schematic diagram of the front support ear seat of this utility model;

[0014] Appendix Figure 6 This is a three-dimensional schematic diagram of the clamping state of the welding fixture for the motorcycle handlebar upright tube and the support lug of this utility model.

[0015] In the diagram, a is a bend, b is a vertical pipe, c is a base, d is a front support lug, and e is a rear support lug; 1 is a base plate; 2 is a reference base; 3 is a vertical pipe base, 3-1 is support I, 3-2 is cylinder I, and 3-3 is pressure head I; 4 is a handle base, 4-1 is support II, 4-2 is cylinder II, and 4-3 is pressure head II; 5 is a front support lug base, 5-1 is support III, 5-2 is positioning pin I, 5-3 is cylinder III, and 5-4 is pressure head III; 6 is a rear support lug base, 6-1 is support IV, 6-2 is positioning pin II, 6-3 is cylinder IV, and 6-4 is pressure head IV.

[0016] The following description, in conjunction with the accompanying drawings and specific embodiments, further illustrates the welding fixture for the motorcycle steering handlebar vertical tube and support lugs of this utility model. Detailed Implementation

[0017] See appendix Figure 3-6As shown in the figure, the welding fixture for the motorcycle handlebar upright tube and support lugs of this utility model includes: a base plate 1, a reference seat 2, an upright tube seat 3, a handlebar seat 4, a front support lug seat 5, and a rear support lug seat 6; the base plate is a rectangular medium-thick plate; the reference seat is a stepped cylinder fixed in the middle of the base plate; and the diameter of the cylinder matches the inner diameter of the upright tube, and a notch is provided on one side of the step, the size and shape of the notch matching the convex step of the base and forming an angle α with the symmetry plane of the handlebar; the upright tube seat is fixed to the rear side of the reference seat; including: a support I 3-1, a cylinder I 3-2, and a pressure head I 3-3; the support I is L-shaped and fixed upside down to the rear side of the reference seat; the cylinder I... The piston is fixed downwards on support I, and the piston is coaxial with the reference seat; the end of the pressure head I is semi-circular and fixed to the piston end of cylinder I, and its semi-circular end matches the middle of the bend; there are two handle seats, which are symmetrically installed on both sides of the reference seat; including: support II 4-1, cylinder II 4-2 and pressure head II 4-3; support II is a cuboid, and its surface is inclined with a semi-circular groove that matches the end of the bend; the piston of cylinder II is fixed upwards on the rear side of support II; the pressure head II is L-shaped and fixed to the piston end of cylinder II; there are two front support lugs, which are symmetrically fixed on both sides of the front side of the reference seat; including: support III 5-1, positioning post I 5-2, cylinder III 5-3. The support is a cuboid with a surface inclined at a degree β to the horizontal plane and an inclined step on its rear side. The positioning pin I is located on the front side of the support surface, and its size matches the through hole of the lug. The piston of the cylinder III is fixed upwards on the inclined step of the support. The pressure head III is L-shaped and fixed to the piston end of the cylinder III. There are two rear lug seats, symmetrically fixed on both sides of the rear of the reference seat. The system includes: support IV 6-1, positioning pin II 6-2, cylinder IV 6-3, and pressure head IV 6-4. The support IV is a cuboid with a surface inclined at a degree β to the horizontal plane and an inclined step on its rear side. The positioning pin II is located on the surface of the support IV. The front side of the support is sized to match the through hole of the lug; the piston of cylinder IV is fixed upward on the inclined step of support IV; the pressure head IV is L-shaped and fixed to the piston end of cylinder IV; the fixed position and height of the reference seat and handlebar seat are such that when the end of the curved tube of a standard motorcycle handlebar is placed in the semi-circular groove of the handlebar seat and the vertical tube is inserted into the reference seat, the bottom of the curved tube is in close contact with the upper end of the vertical tube and the posture formed by the curved tube and the vertical tube meets the design requirements; the fixed position and height of support III and support IV are such that when the front lug and the rear lug are respectively fitted on positioning post I and positioning post II and are clamped by pressure head III and pressure head IV, the position of each lug meets the design requirements.This utility model relates to a welding fixture for motorcycle handlebar uprights and lugs. It accurately positions and clamps the base, upright, curved pipe, and multiple lugs to be welded in a single operation, allowing for the welding of these components according to design requirements in a single weld. This effectively improves welding efficiency and ensures welding quality. Specifically, during the welding process… Place the base on the reference base, ensuring the raised step of the base fits into the recessed notch of the reference base; insert the vertical tube into the cylinder of the reference base; place the two ends of the bent tube into the semi-circular groove of the handle base; activate cylinder I, the piston of cylinder I pushes the pressure head I downwards to press the middle of the bent tube onto the upper end of the vertical tube; activate cylinder II, the piston of cylinder II pulls the pressure head II to press the two ends of the bent tube into the semi-circular groove of support II; place the front and rear support ears onto the corresponding supports III and IV, ensuring the through holes of the support ears fit onto the corresponding positioning pins; activate cylinders III and IV, the pistons of cylinders III and IV pull the pressure heads III and IV respectively to press the corresponding support ears onto supports III and IV; thus, the accurate positioning and clamping of the base, vertical tube, bent tube, and multiple support ears are completed; welding under these conditions not only effectively improves welding efficiency but also effectively ensures welding quality.

[0018] As one of the preferred technical solutions, the pressing end of the pressure head II is a length-adjustable bolt structure. By adjusting the length of the pressing end of the pressure head II, the clamping force of the pressure head II on the middle of the bend can be adjusted, ensuring accurate positioning and clamping of the vertical pipe and the bend (see Appendix). Figure 3 ).

[0019] As one of the preferred technical solutions, blind holes are provided on the pressing surfaces of the pressure heads III and IV, and the size of the blind holes matches that of the positioning posts I and II, respectively. Thus, when the pressure heads III and IV press against the front and rear support ears, the pressing surfaces fit onto the positioning posts I or II, ensuring accurate positioning and clamping of the front and rear support ears.

[0020] Obviously, the beneficial technical effect of this utility model of welding fixture for motorcycle handlebar uprights and lugs is that it can accurately position and clamp the uprights and lugs and other components in one go, which effectively improves welding efficiency and ensures welding quality.

Claims

1. A motorcycle handlebar riser and bracket welding fixture, characterized by, The welding fixture includes: a base plate, a reference base, a vertical tube base, a handle base, a front support lug base, and a rear support lug base; the base plate is a rectangular medium-thick plate; the reference base is a stepped cylinder fixed in the middle of the base plate; and the diameter of the cylinder matches the inner diameter of the vertical tube, a notch is provided on one side of the step, the size and shape of the notch match the convex step of the base and form an angle α degrees with the symmetrical plane of the direction handle; the vertical tube base is fixed to the rear side of the reference base; it includes: a support I, a cylinder I, and a pressure head I; the support I is L-shaped and fixed upside down to the rear side of the reference base; the piston of the cylinder I is fixed downward on the support I, and the piston is coaxial with the reference base. The pressure head I has a semi-circular end fixed to the piston end of cylinder I, and its semi-circular end matches the middle of the bend; there are two handle seats, symmetrically installed on both sides of the reference seat; including: support II, cylinder II and pressure head II; support II is a cuboid, and its surface is inclined with a semi-circular groove that matches the end of the bend; the piston of cylinder II is fixed upward on the rear side of support II; the pressure head II is L-shaped and fixed to the piston end of cylinder II; there are two front support lugs, symmetrically fixed on both sides of the front side of the reference seat; including: support III, positioning post I, cylinder III and pressure head III; support III is a cuboid, and its surface is inclined with the horizontal The support has a β-degree inclined surface with an inclined step on its rear side; the positioning post I is located on the front side of the support III surface, and its size matches the through hole of the lug; the piston of the cylinder III is fixed upward on the inclined step of the support III; the pressure head III is L-shaped and fixed to the piston end of the cylinder III; there are two rear lug seats, symmetrically fixed on both sides of the rear side of the reference seat; including: support IV, positioning post II, cylinder IV and pressure head IV; the support IV is a cuboid with a β-degree inclined surface to the horizontal plane and an inclined step on its rear side; the positioning post II is located on the front side of the support IV ... cylinder III is L-shaped and fixed to the piston end of the cylinder III; the pressure head III is L-shaped and fixed to the piston end of the cylinder III; the pressure head III is L-shaped and fixed to the piston end of the cylinder III; the pressure head III is L-shaped and fixed to the piston end of the cylinder III; the pressure head III is L-shaped and fixed to the piston end of the cylinder III; the pressure head III is L-shaped and fixed to the piston end of the cylinder III; the pressure head III is L-shaped and fixed to the piston end of the cylinder III; the pressure head III is L-shaped and fixed to the piston end of the cylinder III; the pressure head III is L-shaped and fixed to the piston end of the cylinder III; the pressure head III is L-shaped and fixed to the piston end of the cylinder III; the pressure head III is L- The piston of cylinder IV is fixed upward on the inclined step of support IV; the pressure head IV is L-shaped and fixed to the piston end of cylinder IV; wherein, the fixed position and height of the reference seat and handlebar seat are such that when the bent end of the standard motorcycle handlebar is placed in the semi-circular groove of the handlebar seat and the vertical tube is inserted into the reference seat, the bottom of the bent tube is in close contact with the upper end of the vertical tube and the posture formed by the bent tube and the vertical tube meets the design requirements; the fixed position and height of support III and support IV are such that when the front support lug and the rear support lug are respectively fitted on positioning post I and positioning post II and are clamped by pressure head III and pressure head IV, the position of each support lug meets the design requirements.

2. The motorcycle handlebar riser and bracket welding fixture of claim 1, wherein, The pressure head II is a bolt structure with adjustable length.

3. The motorcycle handlebar riser and bracket welding fixture of claim 1 or 2, wherein, Blind holes are provided on the pressing surfaces of the pressure head III and pressure head IV, and the size of the blind holes matches that of the positioning post I and positioning post II, respectively.

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