A motorcycle clutch gear turning auxiliary clamping tool

Abstract

The utility model belongs to the machining dress technical field, concretely relates to a kind of motorcycle clutch gear turning auxiliary clamping frock, comprising: fixed disc, the one end center of the fixed disc is provided with clamping column;Center positioning component, the center positioning component is set at the other end center of fixed disc;Circumferential positioning component, the circumferential positioning component movably set on the end face of fixed disc away from clamping column, for solving the mode of twice clamping is used to process the entire outer circle of gear blank, it exists clamping error, lead to the entire outer circle of gear processed after twice clamping, prone to different shaft and misregistration phenomenon.

Description

Technical Field

[0001] This utility model belongs to the field of machining equipment technology, specifically relating to an auxiliary clamping fixture for turning motorcycle clutch gears. Background Technology

[0002] The primary driven gear of a motorcycle clutch is a key and indispensable component in the power transmission system. It is located between the clutch assembly and the gearbox, and is usually installed at the front end of the gearbox input shaft. It meshes tightly with or connects to the clutch drum and has the structure of a spur gear or a helical gear.

[0003] During the machining process of the primary driven gear of the clutch, the basic outline of the gear blank must be machined by turning. However, nowadays, for the machining of the outer circle of the gear blank, when clamping, a part of the outer circle of the gear blank is first clamped by a three-jaw chuck. Then, the outer circle of the gear blank that is not clamped is machined by a cutting tool. After this part of the outer circle is machined, the gear blank is turned around and the machined outer circle is clamped by the three-jaw chuck. Then, the remaining unmachined outer circle of the gear blank is machined by a cutting tool. In this way, the entire outer circle of the gear blank is finally machined by a two-clamping method.

[0004] However, using a double clamping method to machine the entire outer circle of the gear blank results in clamping errors, which can easily lead to misalignment and non-axis misalignment of the entire outer circle of the gear after double clamping. Utility Model Content

[0005] Based on the problems mentioned in the background technology above, this utility model provides an auxiliary clamping fixture for turning motorcycle clutch gears, which is used to solve the problem that when machining the entire outer circle of a gear blank using a two-clamping method, there are clamping errors, which cause the entire outer circle of the gear machined after the two clamping to be misaligned due to misalignment.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A motorcycle clutch gear turning auxiliary clamping fixture includes:

[0008] A fixing plate, wherein a clamping post is provided at the center of one end of the fixing plate;

[0009] A central positioning component is disposed at the center of the other end of the fixed disk;

[0010] A circumferential positioning component is movably disposed on the end face of the fixed disk away from the clamping column.

[0011] Based on the above technical solution, the present invention has made the following improvements:

[0012] Furthermore, the central positioning component includes a ring, which is located at the center of the other end of the fixed disk. A support cylinder and a support rod are movably arranged opposite each other on the circumferential side wall of the ring through the center point. One end of the support rod is housed in the support cylinder. A first fastening screw is screwed into the internal thread of the end face of the ring where it fits with the support cylinder, and a second fastening screw is screwed into the internal thread of the end face of the ring where it fits with the support rod.

[0013] Furthermore, the fixed disk has two scale lines on its end face outside the circumferential sidewall of the ring, facing each other through the center point. The scale lines, the support cylinder, and the support rod are all on the same horizontal line.

[0014] Furthermore, the circumferential positioning component includes a T-slot, which is disposed on the end face of the fixed disk away from the clamping column. The T-slot faces the center of the fixed disk. A buckle plate is disposed on one end of the T-slot away from the center of the fixed disk via a connecting screw. A screw is rotatably disposed between the buckle plate and one end of the T-slot. A rotating part is disposed on one end of the screw near the buckle plate. A T-shaped slider is threaded on the screw and is locked in the T-slot. A screw hole is disposed on one side of the T-shaped slider, and a positioning head is threaded in the screw hole. The positioning head is located outside the end face of the fixed disk away from the clamping column.

[0015] Furthermore, one end of the screw is smoothly sleeved inside the buckle plate, and the other end of the screw is smoothly engaged in one end of the T-slot.

[0016] The beneficial effects of this utility model are:

[0017] In use, the clamping column is held in place by the three-jaw chuck on the lathe, thus mounting the fixture onto the lathe. Then, one side of the gear blank is placed against one side of the fixed plate, and the hole in the center of the gear blank is fitted onto the center positioning component, and a corresponding weight-reducing hole on the gear blank is fitted onto the positioning head in the circumferential positioning component. Subsequently, the tailstock on the lathe guide rail is moved so that the tapered part of the lathe top cone on the tailstock rests against one end of the center hole of the gear blank, thereby completing the clamping of the gear blank. Finally, the outer circle of the gear blank can be machined in one pass using a cutting tool, avoiding the need for secondary clamping to machine the entire outer circle of the gear, thus preventing misalignment due to misalignment. Attached Figure Description

[0018] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0019] Figure 1 This is a structural diagram of an auxiliary clamping fixture for turning motorcycle clutch gears according to the present invention;

[0020] Figure 2 This is a partial cross-sectional view of a motorcycle clutch gear turning auxiliary clamping fixture according to the present invention.

[0021] Figure 3 This is a plan view of the usage state of the auxiliary clamping tool for turning motorcycle clutch gears according to this utility model;

[0022] Figure 4 This is a cross-sectional view of the working state of the auxiliary clamping fixture for turning motorcycle clutch gears according to this utility model.

[0023] The attached diagram is labeled as follows:

[0024] 101. Fixed plate; 102. Clamping post; 201. Ring; 202. Support cylinder; 203. Support rod; 204. Fastening screw one; 205. Fastening screw two; 206. Scale line; 301. T-slot; 302. Connecting screw; 303. Buckle plate; 304. Screw; 305. Rotating part; 306. T-slider; 307. Screw hole; 308. Positioning head. Detailed Implementation

[0025] like Figures 1-4 As shown, a motorcycle clutch gear turning auxiliary clamping fixture includes:

[0026] The fixed plate 101 has a clamping column 102 at the center of one end. When in use, the clamping column 102 can be clamped by the three-jaw chuck on the lathe, so that the tooling can be clamped on the three-jaw chuck of the lathe.

[0027] A central positioning component is located at the center of the other end of the fixed disk 101. The central positioning component includes a ring 201, which is located at the center of the other end of the fixed disk 101. A support cylinder 202 and a support rod 203 are movably arranged opposite each other on the circumferential sidewall of the ring 201 through the center point. One end of the support rod 203 is housed in the support cylinder 202. A first fastening screw 204 is screwed into the internal thread of the end face of the ring 201 where it fits with the support cylinder 202, and a second fastening screw 205 is screwed into the internal thread of the end face of the ring 201 where it fits with the support rod 203. The support cylinder 202 and the support rod 203 can move on the circumferential sidewall of the ring 201, and the first fastening screw 204 and the second fastening screw 205 can lock and fix the support cylinder 202 and the support rod 203 respectively to prevent them from moving.

[0028] After the tooling is clamped on the three-jaw chuck of the lathe, one side of the gear blank is attached to the side wall of the fixed plate 101, and the center hole of the gear blank is fitted onto the ring 201, so that the gear blank and the fixed plate 101 are kept on the same axis (i.e., in a coaxial state).

[0029] Since the center hole diameter varies depending on the gear blank's specifications, a support cylinder 202 and a support rod 203 are used. When the center hole diameter on the gear blank is larger than the outer diameter of the ring 201, the support cylinder 202 and support rod 203 can be moved so that one end of the support cylinder 202 extends out of the outer circumference of the ring 201 and abuts against the center hole wall on the gear blank, and one end of the support rod 203 extends out of the outer circumference of the ring 201 and abuts against the center hole wall on the gear blank. Then, the fastening screw 20 is tightened. 4. Fastening screw 205 is screwed into the side wall of ring 201, and the screw-in end of fastening screw 204 abuts against the support cylinder 202, and the screw-in end of fastening screw 205 abuts against the support rod 203, so as to lock and fix the support cylinder 202 and the support rod 203, so that the support cylinder 202 and the support rod 203 finally support each other in the center hole of the gear blank, so that the gear blank and the fixed disk 101 are kept on the same axis; finally, it can meet the needs of internal support operation for the center holes of different diameters in gear blanks of different specifications.

[0030] To ensure that the support cylinder 202 and support rod 203 extend the same distance from the inside of the ring 201, two scale lines 206 are provided opposite each other through the center point on the end face of the fixed plate 101 located outside the circumferential side wall of the ring 201. The scale lines 206 are located on the same horizontal line as the support cylinder 202 and support rod 203. Therefore, when moving the support cylinder 202 and support rod 203, the position of the moved end of the support cylinder 202 and support rod 203 on the scale line 206 can be observed.

[0031] A circumferential positioning component is movably mounted on the end face of the fixed plate 101 opposite to the clamping post 102. The circumferential positioning component includes a T-slot 301, which is located on the end face of the fixed plate 101 opposite to the clamping post 102, facing the center of the fixed plate 101. A latching plate 303 is mounted on one end of the T-slot 301 opposite to the center of the fixed plate 101 via a connecting screw 302. A screw 304 is rotatably mounted between the latching plate 303 and one end of the T-slot 301. One end of the rod 304 is smoothly sleeved in the buckle plate 303, and the other end of the screw 304 is smoothly engaged in one end of the T-slot 301. A rotating part 305 is provided at the end of the screw 304 near the buckle plate 303. A T-slider 306 is threaded on the screw 304. The T-slider 306 is engaged in the T-slot 301. A screw hole 307 is provided on one side of the T-slider 306. A positioning head 308 is threaded in the screw hole 307. The positioning head 308 is located outside the end face of the fixed plate 101 away from the clamping column 102.

[0032] When this fixture is clamped on the three-jaw chuck of the lathe, and one side of the gear blank is attached to the side wall of the fixed plate 101, and the center hole of the gear blank is fitted onto the ring 201, the positioning head 308 is fitted into a corresponding weight-reducing hole on the gear blank to limit the circumferential rotation of the gear blank. Then, the tailstock on the lathe guide rail is moved so that the tapered part of the lathe top cone on the tailstock rests on one end of the center hole of the gear blank, thereby completing the clamping of the gear blank. After clamping, the lathe spindle rotates, driving the three-jaw chuck, this fixture, and the gear blank to rotate synchronously. During the rotation of the gear blank, the outer circle of the gear blank can be machined in one go using a cutting tool, avoiding the need for secondary clamping to machine the entire outer circle of the gear, thus preventing misalignment due to different axes.

[0033] Since the weight-reducing holes on gear blanks of different specifications may appear on different radial directions, a T-slot 301, a retaining plate 303, a screw 304, and a T-slider 306 are provided. During adjustment, the end of an Allen wrench is inserted into the prism hole of the rotating part 305, and then the screw 304 is rotated. During the rotation of the screw 304, the T-slider 306 can move within the T-slot 301, thereby adjusting the position of the positioning head 308 in the radial direction of the fixed plate 101. This allows the position of the positioning head 308 to be adjusted to correspond to the radial position of the weight-reducing hole on the gear blank. At the same time, the positioning head 308 can also be unscrewed from the screw hole 307 on the T-slider 306 for replacement, to replace it with a positioning head 308 that matches the diameter of the weight-reducing hole on the gear blank.

[0034] The present invention has been described in detail above. The specific embodiments are provided only to help understand the method and core idea of ​​the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A clamping fixture for auxiliary machining of motorcycle clutch gears, characterized in that: include: A fixed plate (101) is provided with a clamping post (102) at the center of one end of the fixed plate (101). A central positioning component is disposed at the center of the other end of the fixed disk (101); A circumferential positioning component is movably disposed on the end face of the fixed disk (101) away from the clamping column (102).

2. The auxiliary clamping fixture for turning motorcycle clutch gears according to claim 1, characterized in that: The central positioning component includes a ring (201), which is located at the center of the other end of the fixed disk (101). A support cylinder (202) and a support rod (203) are movably arranged opposite each other on the circumferential side wall of the ring (201) through the center point. One end of the support rod (203) is housed in the support cylinder (202). A fastening screw (204) is screwed into the inner thread of the end face of the ring (201) where it fits with the support cylinder (202), and a fastening screw (205) is screwed into the inner thread of the end face of the ring (201) where it fits with the support rod (203).

3. The auxiliary clamping fixture for turning motorcycle clutch gears according to claim 2, characterized in that: The fixed disk (101) has two scale lines (206) arranged opposite each other on the end face outside the circumferential side wall of the ring (201) through the center point. The scale lines (206), the support cylinder (202), and the support rod (203) are all located on the same horizontal line.

4. The auxiliary clamping fixture for turning motorcycle clutch gears according to claim 1, characterized in that: The circumferential positioning component includes a T-slot (301), which is disposed on the end face of the fixed plate (101) away from the clamping post (102). The T-slot (301) faces the center of the fixed plate (101). A buckle plate (303) is provided at one end of the T-slot (301) away from the center of the fixed plate (101) by a connecting screw (302). A screw (304) is rotatably disposed between the buckle plate (303) and one end of the T-slot (301). A rotating part (305) is provided at one end of the screw (304) near the buckle plate (303). A T-shaped slider (306) is threaded on the screw (304). The T-shaped slider (306) is locked in the T-shaped groove (301). A screw hole (307) is provided on one side of the T-shaped slider (306). A positioning head (308) is threaded in the screw hole (307). The positioning head (308) is located outside the end face of the fixed plate (101) away from the clamping column (102).

5. The auxiliary clamping fixture for turning motorcycle clutch gears according to claim 4, characterized in that: One end of the screw (304) is smoothly sleeved inside the buckle plate (303), and the other end of the screw (304) is smoothly snapped into one end of the T-slot (301).

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