Motorcycle handlebar stem connector handlebar post hole machining tooling

Abstract

This utility model relates to a machining fixture for the handlebar post hole of a motorcycle handlebar tube connector. It employs a machining method to process the handlebar post hole of the motorcycle handlebar tube connector, including a turntable, a steering column hole positioning device, a pressure plate, a cylinder, a support column, and a balance weight. The turntable is coaxially fixed to the lathe chuck. The steering column hole positioning device is located on one side of the turntable surface and includes a support plate and a positioning post. The pressure plate is annular with a bolt fitted at its center, and the bolt matches the threaded hole on the positioning post. The piston of the cylinder is fixed upwards at the center of the turntable surface, and the piston is coaxial with the turntable. The end of the support column has a notched conical blind hole that matches the shape of the handlebar tube seat of the connector blank. The balance weight is a hollow cylinder. The beneficial technical effect of this utility model is that it can accurately fix the connector blank on the lathe chuck, ensuring that the handlebar tube seat of the connector blank is coaxial with the lathe spindle, effectively guaranteeing the dimensional and shape accuracy of the machining.

Description

Technical Field

[0001] This utility model relates to a machining technology for the handlebar post hole of a motorcycle handlebar tube connector seat, and particularly to a machining tooling for the handlebar post hole of a motorcycle handlebar tube connector seat. Background Technology

[0002] The motorcycle handlebar stem connector, serving as the connection between the handlebars and the steering column, has a relatively complex shape. One end is a through hole (commonly referred to as the steering column hole) that fits onto the steering column, while the other end is a tapered handlebar stem seat with a blind hole (commonly referred to as the handlebar stem hole) for inserting the handlebar stem. The two are connected by a connecting plate, and their axes are set at a predetermined angle. The blank for the motorcycle handlebar stem connector (hereinafter referred to as the connector blank) is usually a die-cast aluminum alloy part. It is formed into a predetermined shape through aluminum alloy die casting, and then machined to meet design requirements (see Appendix). Figure 1 In the diagram, a is the directional post hole, and b is the handle post hole. Due to the limitations of the die-casting aluminum alloy process, the handle post hole cannot be directly die-cast and needs to be formed through subsequent processing.

[0003] Existing technology typically employs drilling to machine the handlebar post hole of the motorcycle handlebar connector. This involves using a fixture to clamp the handlebar connector onto the drilling machine's worktable, ensuring coaxiality between the handlebar connector and the drilling machine spindle, and then drilling the post hole. However, the complex shape of the motorcycle handlebar connector blank makes clamping difficult, making it challenging to guarantee coaxiality between the handlebar connector and the drilling machine spindle in every clamping operation. Furthermore, limitations in drilling technology itself make it difficult to ensure the dimensional and shape accuracy of the machined handlebar post hole. Summary of the Invention

[0004] To address the above problems, this utility model proposes a machining tool for the handlebar post hole of a motorcycle handlebar tube connector.

[0005] This utility model relates to a machining fixture for machining the handlebar post hole of a motorcycle handlebar tube connector. It employs a machining method to process the handlebar post hole of the motorcycle handlebar tube connector, including a turntable, a steering column hole positioning device, a pressure plate, a cylinder, a support column, and a balance weight. The turntable is coaxially fixed to a lathe chuck. The steering column hole positioning device is located on one side of the turntable surface and includes a support plate and a positioning post. The support plate is fixed to one side of the turntable surface. The positioning post is fixed to the outer side of the support plate, its outer diameter matching the steering column hole of the connector blank, and a screw hole is provided at the center of the positioning post. The fixed position and tilt angle are based on the fact that when the direction pin hole of the connecting seat blank is fitted onto the positioning pin, the axis of the connecting seat blank's handle seat is coaxial with the turntable; the pressure plate is annular, with a bolt fitted in the center, and the bolt matches the screw hole on the positioning pin; the piston of the cylinder is fixed upward at the center of the turntable surface, and the piston is coaxial with the turntable; the support is fixed to the piston end of the cylinder, and a notched conical blind hole is provided at the end of the support that matches the shape of the connecting seat blank's handle seat; the balance block is a hollow cylinder, fixed to the opposite side of the direction pin hole positioning by bolts.

[0006] Furthermore, the pressure plate is a combined structure, including: a notch plate and a bolt; the outer diameter of the notch plate is larger than that of the positioning post, and the size of the notch matches that of the bolt; the bolt matches the screw hole on the positioning post.

[0007] Furthermore, the positioning column and the support plate are fixed in a detachable manner.

[0008] The beneficial technical effect of this utility model of a machining fixture for motorcycle handlebar tube connector holes is that it can accurately fix the connector blank on the lathe chuck, ensuring that the connector blank handlebar seat is coaxial with the lathe spindle, effectively guaranteeing the dimensional and shape accuracy of the machining. Attached Figure Description

[0009] Appendix Figure 1 This is a 3D schematic diagram of the handlebar post hole of the motorcycle handlebar connector before and after machining.

[0010] Appendix Figure 2 This is a three-dimensional schematic diagram of the machining tooling for the handlebar tube post hole of the motorcycle handlebar tube connector seat according to this utility model.

[0011] Appendix Figure 3 This is a three-dimensional schematic diagram of the clamping state of the machining tooling for the handlebar tube post hole of the motorcycle handlebar tube connecting seat according to this utility model.

[0012] Appendix Figure 4 This is a three-dimensional schematic diagram of the pressure plate of the motorcycle assembly structure of this utility model.

[0013] In the diagram, 1 is the turntable, 2 is the directional column hole positioning, 2-1 is the support plate, 2-2 is the positioning column, 3 is the pressure plate, 3-1 is the circular notch plate, 3-2 is the bolt, 4 is the cylinder, 5 is the support column, 6 is the balance block, a is the directional column hole, b is the handle column hole, and A is the connecting seat blank.

[0014] The following description, in conjunction with the accompanying drawings and specific embodiments, further illustrates the machining tooling for the handlebar tube post hole of the motorcycle handlebar tube connector seat according to this utility model. Detailed Implementation

[0015] See appendix Figure 2 , 3 As shown in the figure, this utility model relates to a machining fixture for machining the handlebar post hole of a motorcycle handlebar tube connector. The fixture uses a turning method to machine the handlebar post hole of the motorcycle handlebar tube connector. It includes: a turntable 1, a steering column hole positioning 2, a pressure plate 3, a cylinder 4, a support column 5, and a balance block 6. The turntable is coaxially fixed to the lathe chuck. The steering column hole positioning is located on one side of the turntable surface and includes: a support plate 2-1 and a positioning post 2-2. The support plate is fixed to one side of the turntable surface. The positioning post is fixed to the outer side of the support plate, and its outer diameter matches the steering column hole of the connector blank. A positioning post is located at the center of the positioning post. The support plate is equipped with screw holes. Its fixed position and tilt angle are such that when the directional pin hole of the connecting seat blank is fitted onto the positioning pin, the axis of the connecting seat blank's handle seat is coaxial with the turntable. The pressure plate is annular with a bolt fitted at its center, and the bolt matches the screw hole on the positioning pin. The piston of the cylinder is fixed upwards at the center of the turntable surface, and the piston is coaxial with the turntable. The support column is fixed to the piston end of the cylinder, and a notched conical blind hole matching the shape of the connecting seat blank's handle seat is provided at the end of the support column. The balance block is a hollow cylinder, fixed to the opposite side of the directional pin hole positioning by bolts. During processing, the directional pin hole of the connecting seat blank is fitted onto the positioning pin; the cylinder is activated, and the piston pushes the support column upwards, fitting the notched conical blind hole at the end of the support column onto the connecting seat blank's handle seat, achieving precise positioning of the connecting seat blank's handle seat; the pressure plate is tightened onto the positioning pin to achieve stable clamping of the connecting seat blank. In fact, the notched tapered blind hole at the end of the support column also serves to clamp the connecting seat blank; furthermore, it restricts the swinging or shaking of the connecting seat blank's handle during machining, further ensuring machining quality. After machining, the pressure plate is removed; the cylinder is activated, and the support column returns to its original position; the machined connecting seat blank can then be removed. It is evident that this new machining fixture accurately positions the connecting seat blank's handle before clamping, effectively and precisely fixing the connecting seat blank onto the lathe chuck; ensuring that the connecting seat blank's handle is coaxial with the lathe spindle, effectively guaranteeing the dimensional and shape accuracy of the machining.

[0016] See appendix Figure 4As one of the preferred technical solutions, the pressure plate is a combined structure, including: a circular notch plate 3-1 and bolts 3-2; the outer diameter of the circular notch plate is larger than that of the positioning post, and the size of the notch matches that of the bolt; the bolt matches the screw hole on the positioning post. Using a combined pressure plate structure allows for easier loading and unloading of the connecting seat blank. Simply loosening the bolts and removing the circular notch plate allows the connecting seat blank to be removed from the positioning post, without needing to completely unscrew the pressure plate from the positioning post.

[0017] As one of the preferred technical solutions, the positioning post and the support plate are fixed in a detachable manner. The detachable positioning post allows for easy replacement to accommodate the processing of connecting seat blanks of different specifications.

[0018] Obviously, the beneficial technical effect of the machining fixture for the handlebar tube connecting seat of this utility model is that it can accurately fix the connecting seat blank on the lathe chuck, ensuring that the connecting seat blank handlebar tube seat is coaxial with the lathe spindle, effectively ensuring the dimensional accuracy and shape accuracy of the machining.

Claims

1. A handlebar tube connecting seat handlebar tube column hole machining tool, characterized in that, This machining fixture uses a turning method to machine the handlebar post hole of the motorcycle handlebar tube connector. Includes turntable, steering column hole positioning, pressure plate, cylinder, support, and balance weight; The turntable is coaxially fixed to the lathe chuck; the directional pin hole positioning is set on one side of the turntable surface, including: a support plate and a positioning pin; The support plate is fixed to one side of the turntable surface; the positioning post is fixed to the outer side of the support plate, its outer diameter matching the direction post hole of the connecting seat blank, and a screw hole is provided in the center of the positioning post; the fixed position and tilt angle of the support plate are based on the fact that when the direction post hole of the connecting seat blank is fitted onto the positioning post, the axis of the connecting seat blank's handle seat is coaxial with the turntable; the pressure plate is annular, with a bolt fitted in the center, and the bolt matches the screw hole on the positioning post; the piston of the cylinder is fixed upward at the center of the turntable surface, and the piston is coaxial with the turntable; the support column is fixed to the piston end of the cylinder, and a notched conical blind hole matching the shape of the connecting seat blank's handle seat is provided at the end of the support column; the balance block is a hollow cylinder, fixed to the opposite side of the direction post hole positioning by bolts.

2. The handlebar tube joint seat handlebar tube column hole machining tooling fixture according to claim 1, characterized in that, The pressure plate is a combined structure, including: a notch plate and bolts; the outer diameter of the notch plate is larger than that of the positioning post, and the size of the notch matches that of the bolts; the bolts match the screw holes on the positioning post.

3. The handlebar tube joint seat handlebar tube column hole machining tooling fixture according to claim 1 or 2, characterized in that, The positioning column and the support plate are fixed in a detachable manner.

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