Motorcycle handlebar tube connector steering column hole machining tooling

Abstract

This utility model relates to a tooling for machining the steering column hole of a motorcycle handlebar tube connector, comprising: a cylindrical body, three jaws, a drive disc, a motor, a gear, a bottom cover, a cylinder, and a positioning pin. The cylindrical body is a semi-closed cylinder at one end, with three T-shaped slides at the semi-closed end. Three jaws are slidably mounted within the T-shaped slides of the cylindrical body, each comprising: a strip-shaped jaw, a support column, and a clamping plate. The front end of the drive disc has a planar thread matching the threaded groove of the strip-shaped jaw. The gear is fixed to the motor shaft and meshes with the internal circumferential teeth at the rear end of the drive disc. The positioning pin is fixed to the piston end of the cylinder, and the diameter of the front end of the positioning pin matches the steering column hole of the handlebar tube connector blank. The beneficial technical effect of this utility model is that it can clamp and fix the connector blank while ensuring that the axis of the steering column hole is coaxial with the axis of the boring tool, thus solving the problem of "one-sided" boring of the steering column hole.

Description

Technical Field

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

[0002] The motorcycle handlebar tube connector, serving as the link between the handlebars and the steering column, has a relatively complex shape. One end is a through hole that fits onto the steering column (commonly referred to as the steering column hole), and the other end is a blind hole that inserts into the handlebar tube. The two are connected by a connecting plate, and their axes are positioned at a set angle in space (see appendix). Figure 1 The blank for the motorcycle handlebar tube connector (hereinafter referred to as the connector blank) is usually a die-cast aluminum alloy part, which is then machined to meet design requirements (see Appendix). Figure 1 Because the steering column hole on the motorcycle handlebar stem connector is relatively large, it is usually machined using a boring method. This involves clamping and fixing the connector blank on the worktable of a boring machine, ensuring that the axis of the steering column hole in the connector blank is coaxial with the axis of the boring tool; then, the inner wall surface of the steering column hole in the connector blank is boring. To save raw materials and reduce subsequent machining passes, the machining allowance left during die casting of the connector blank is relatively small; coupled with the process errors in die casting, the machining allowance of the steering column hole in the connector blank is small and unstable. This places high demands on ensuring that the axis of the steering column hole in the connector blank is coaxial with the axis of the boring tool when clamping and fixing the connector blank on the worktable, to prevent eccentricity during clamping and fixing of the connector blank, which would result in "one-sided" boring of the steering column hole in the connector blank (i.e., a part of the inner wall of the steering column hole in the connector blank is not machined, forming a "black edge").

[0003] The existing method for machining the steering column hole of the motorcycle handlebar tube connector uses a modified three-jaw chuck to clamp and fix the connector blank. Due to the extremely irregular shape of the connector blank, this clamping and fixing method makes it difficult to ensure that the axis of the steering column hole of the connector blank is coaxial with the axis of the boring tool, resulting in "one-sided" boring of the steering column hole of the connector blank. Summary of the Invention

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

[0005] This utility model relates to a machining fixture for the steering column hole of a motorcycle handlebar tube connector, comprising: a cylindrical body, three claws, a drive disc, a motor, a gear, a bottom cover, a cylinder, and a positioning column; the cylindrical body is a semi-closed cylinder at one end, with three T-shaped slides provided at the semi-closed end; the three claws are three in number and are slidably installed within the T-shaped slides of the cylindrical body; the fixture includes: a strip-shaped claw, a support column, and a clamping plate; the strip-shaped claw has a T-shaped cross-section and is slidably installed within the T-shaped slides of the cylindrical body; a threaded groove is provided on the bottom surface of the strip-shaped claw, and the threaded groove is three segments cut from a single planar thread; a cylindrical support column is fixed to the front of the strip-shaped claw; the clamping plate is fixed to the upper end of the support column. Furthermore, the shape of the side of the clamping plate facing the center of the cylinder matches the corresponding edge of the handle tube connecting seat blank; the front end of the drive disc is provided with a planar thread that matches the thread groove of the strip claw and meshes with the thread groove of the strip claw; a circumferential internal tooth is provided at the rear end of the drive disc; the rotating shaft of the motor is eccentrically fixed to the inner side of the bottom cover; the gear is fixed on the rotating shaft of the motor, and when the bottom cover is fixed at the rear end of the cylinder, the gear meshes with the circumferential internal tooth at the rear end of the drive disc; the piston of the cylinder is fixed upward at the center of the front of the cylinder; the positioning pin is fixed at the piston end of the cylinder, and the diameter of the front end of the positioning pin matches the direction pin hole of the handle tube connecting seat blank.

[0006] Furthermore, the front end of the positioning post is tapered, and the angle of the tapered angle is 0.5 to 1.0°.

[0007] The beneficial technical effect of this utility model of a tooling for machining the steering column hole of a motorcycle handlebar tube connector is that it can conveniently clamp and fix the connector blank while ensuring that the axis of the steering column hole of the connector blank is coaxial with the axis of the boring tool, thus solving the problem of "one-sided" boring of the steering column hole of the connector blank. Attached Figure Description

[0008] Appendix Figure 1 These are three-dimensional schematic diagrams of the motorcycle handlebar tube connector before and after machining.

[0009] Appendix Figure 2 This is a three-dimensional schematic diagram of the tooling for machining the direction post hole of the motorcycle handlebar tube connecting seat according to this utility model;

[0010] Appendix Figure 3 This is an exploded three-dimensional schematic diagram of the tooling for machining the direction post hole of the motorcycle handlebar tube connecting seat according to this utility model.

[0011] Appendix Figure 4 This is a partial three-dimensional schematic diagram of the tooling for machining the direction post hole of the motorcycle handlebar tube connecting seat according to this utility model;

[0012] Appendix Figure 5 This is a three-dimensional schematic diagram of the positioning state of the machining fixture for the direction column hole of the motorcycle handlebar tube connecting seat according to this utility model.

[0013] Appendix Figure 6 This is a three-dimensional schematic diagram of the clamping state of the tooling for machining the direction post hole of the motorcycle handlebar tube connecting seat according to this utility model.

[0014] In the figure, 1 is the cylinder, 2 is the three-jaw jack, 2-1 is the strip-shaped jack, 2-2 is the support column, 2-3 is the clamping plate, 3 is the drive disc, 4 is the motor, 5 is the gear, 6 is the bottom cover, 7 is the cylinder, 8 is the positioning pin, and A is the blank for the handle tube connecting seat.

[0015] The following description, in conjunction with the accompanying drawings and specific embodiments, further illustrates the machining tooling for the direction column hole of the motorcycle handlebar tube connector of this utility model. Detailed Implementation

[0016] See appendix Figure 2-6 This utility model relates to a machining fixture for the steering column hole of a motorcycle handlebar tube connector, comprising: a cylindrical body 1, three claws 2, a drive disc 3, a motor 4, a gear 5, a bottom cover 6, a cylinder 7, and a positioning pin 8; the cylindrical body is a semi-closed cylinder at one end, with three T-shaped slideways at the semi-closed end; the three claws are three in number and are slidably installed in the T-shaped slideways of the cylindrical body; the fixture includes: a strip-shaped claw 2-1, a support column 2-2, and a clamping plate 2-3; the strip-shaped claw has a T-shaped cross-section and is slidably installed in the T-shaped slideways of the cylindrical body; a threaded groove is provided on the bottom surface of the strip-shaped claw, and the threaded groove is three segments cut from a single planar thread; a cylindrical support column is fixed on the front of the strip-shaped claw; the clamping plate... The shape of the clamping plate, which is fixed to the upper end of the support column and faces the center of the cylinder, matches the corresponding edge of the handlebar tube connector blank. The front end of the drive disc is provided with a planar thread that matches the thread groove of the strip claw and meshes with the thread groove of the strip claw. A circumferential internal tooth is provided at the rear end of the drive disc. The rotating shaft of the motor is eccentrically fixed to the inner side of the bottom cover. The gear is fixed on the rotating shaft of the motor, and when the bottom cover is fixed at the rear end of the cylinder, the gear meshes with the circumferential internal tooth at the rear end of the drive disc. The piston of the cylinder is fixed upward at the center of the front of the cylinder. The positioning pin is fixed to the piston end of the cylinder, and the diameter of the front end of the positioning pin matches the direction pin hole of the handlebar tube connector blank. During installation, the tooling for machining the direction pin hole of the motorcycle handlebar tube connector is fixed on the worktable of the boring machine, ensuring that the axis of the cylinder is coaxial with the spindle of the boring machine. During the actual processing, the handle tube connector blank is placed in the three-jaw chuck; the cylinder is activated, and the cylinder piston pushes the positioning pin upward, entering the directional pin hole of the handle tube connector blank, thus achieving accurate positioning of the handle tube connector blank; the motor is activated, and the motor drives the turntable to rotate, pushing the three-jaw chuck to close, thus effectively clamping the handle tube connector blank (see appendix). Figure 5Because the shape of the three-jaw clamping plate on the side facing the center of the cylinder matches the corresponding edge of the handle tube connector blank, it can effectively clamp the handle tube connector blank. When the cylinder is activated again, the cylinder piston drives the positioning pin back to its original position, and boring of the directional pin hole in the handle tube connector blank begins. Clearly, this invention ensures that the cylinder axis is coaxial with the boring machine spindle, and effectively clamps the handle tube connector blank using a three-jaw clamp; it effectively solves the problem of "one-sided" boring of the directional pin hole in the connector blank.

[0017] As one of the preferred technical solutions, the front end of the positioning post is tapered, and the angle of the tapered angle is 0.5 to 1.0°. In this way, it can meet the needs of connecting seat blanks with different dimensional tolerances, and can better ensure that the directional post hole of the connecting seat blank is coaxial with the boring tool axis.

[0018] Obviously, the beneficial technical effect of this utility model of the motorcycle handlebar tube connecting seat direction column hole machining tool is that it can conveniently clamp and fix the connecting seat blank while ensuring that the axis of the direction column hole of the connecting seat blank is coaxial with the axis of the boring tool, thus solving the problem of "one-sided" boring of the direction column hole of the connecting seat blank.

Claims

1. A tooling for machining the steering column hole of a motorcycle handlebar tube connector, characterized in that, The machining fixture includes: a cylinder, three jaws, a drive disc, a motor, gears, a bottom cover, a cylinder, and a positioning pin; the cylinder is a semi-closed cylinder at one end, with three T-shaped slides at the semi-closed end; the three jaws are slidably installed within the T-shaped slides of the cylinder; it includes: a strip-shaped jaw, a support column, and a clamping plate; the strip-shaped jaw has a T-shaped cross-section and is slidably installed within the T-shaped slide of the cylinder; a threaded groove is provided on the bottom surface of the strip-shaped jaw, and the threaded groove is three segments cut from a single planar thread; a cylindrical support column is fixed to the front of the strip-shaped jaw; the clamping plate is fixed to the upper end of the support column, and the clamping plate is directly opposite the center of the cylinder. The shape of one side matches the corresponding edge of the handle tube connector blank; the front end of the drive disc is provided with a planar thread that matches the thread groove of the strip claw and meshes with the thread groove of the strip claw; a circumferential internal tooth is provided at the rear end of the drive disc; the rotating shaft of the motor is eccentrically fixed to the inner side of the bottom cover; the gear is fixed on the rotating shaft of the motor, and when the bottom cover is fixed at the rear end of the cylinder, the gear meshes with the circumferential internal tooth at the rear end of the drive disc; the piston of the cylinder is fixed upward at the center of the front side of the cylinder; the positioning pin is fixed at the piston end of the cylinder, and the diameter of the front end of the positioning pin matches the direction pin hole of the handle tube connector blank.

2. The handlebar tube connector direction column hole processing tooling fixture of claim 1, wherein, The front end of the positioning post is tapered, and the angle of the tapered angle is 0.5 to 1.0°.

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