Auxiliary tool for a yaw meter

Abstract

The utility model discloses an auxiliary tool for deflection instrument, including frock body, one end of frock body is equipped with and is connected with the installation department of the thimble of deflection instrument, the other end is equipped with and the inner wall contact cooperation of the center hole of rim of conical positioning portion, and the minimum diameter of conical positioning portion is greater than the maximum diameter of thimble, and the maximum diameter end of conical positioning portion is located in the inside of the maximum diameter section of thimble, and the installation department is cylindrical and diameter is not greater than the maximum diameter of conical positioning portion, and conical positioning portion is circular platform, and diameter gradually reduces along with away from installation department, and the device can make deflection instrument detect the rim of larger aperture.

Description

Technical Field

[0001] This utility model relates to a yaw meter, and more particularly to an auxiliary tooling for a yaw meter. Background Technology

[0002] In the incoming quality inspection of motorcycle wheel rims, the end face runout and radial runout are crucial inspection items, directly affecting the vehicle's stability and safety. Currently, the industry-standard inspection method involves mounting the wheel rim on a runout tester and then using a dial indicator or inductive probe to measure the runout.

[0003] Existing standard runout testers are typically equipped with a center pin, which clamps the rim to the center hole for positioning and gripping. However, this method has a limitation: the effective clamping length of the center pin is limited. When encountering rims with a large center hole diameter (e.g., greater than Ø18mm), the diameter of the standard center pin is insufficient to achieve effective contact and clamping with the rim's center hole, making testing impossible. This makes existing testing equipment inadequate for manufacturers dealing with diverse rim products, especially medium-to-large diameter rims. They either need to purchase dedicated, large-scale testing equipment, which is costly, or resort to other complex, low-precision temporary methods, affecting testing efficiency and the accuracy of the results.

[0004] Therefore, there is an urgent need for an auxiliary device that can expand the application range of existing runout detectors and make them compatible with the detection of medium and large diameter wheel rims. Summary of the Invention

[0005] Purpose of the utility model: The purpose of this utility model is to provide an auxiliary tooling for a yaw meter that enables the yaw meter to detect rims with larger apertures.

[0006] Technical solution: The auxiliary tooling for the yaw meter described in this utility model includes a tooling body. One end of the tooling body is provided with a mounting part that connects to the ejector pin of the yaw meter, and the other end is provided with a conical positioning part that contacts and engages with the inner wall of the center hole of the rim. The minimum diameter of the conical positioning part is greater than the maximum diameter of the ejector pin.

[0007] The fixture body is connected to the ejector pin of the eccentricity meter by the mounting part, so that the two parts form a whole. The minimum diameter of the tapered positioning part of this fixture is greater than the maximum diameter of the ejector pin, that is, the overall size of the tapered positioning part is larger than the size of the ejector pin. In this way, the tapered positioning part can make contact with the inner wall of the center hole of the rim with a larger diameter and clamp it, thereby improving the application range of the eccentricity meter.

[0008] Preferably, the maximum diameter end of the tapered positioning part is located inside the maximum diameter section of the ejector pin.

[0009] With this configuration, the tapered positioning part and the tapered surface of the ejector pin itself partially overlap, which reduces the axial dimension of the entire fixture. This saves costs and prevents the existing eccentricity gauge from being unsuitable due to its excessive axial length. Since both ejector pins of the eccentricity gauge need to be fitted with this fixture, if the axial length is too long, the fixture may not be able to be installed.

[0010] Preferably, the mounting portion is cylindrical and its diameter is not greater than the maximum diameter of the tapered positioning portion.

[0011] The mounting part is cylindrical and its diameter is no greater than the maximum diameter of the tapered positioning part. This is to prevent the end of the rim from abutting against the end face of the mounting part after the center hole of the rim passes through the tapered positioning part, creating the illusion that the auxiliary tooling is holding the rim. In reality, the rim is not effectively clamped and fixed, which would prevent the rim from being inspected as the ejector pin rotates.

[0012] Preferably, the tooling body is fitted onto the ejector pin, and the mounting part is provided with a threaded through hole and bolts or screws for fixing the two.

[0013] The auxiliary tooling and the ejector pin are fixed together by threaded through holes and bolts, which facilitates the assembly and disassembly of both.

[0014] Preferably, the threaded through holes are provided in multiple circumferential directions on the mounting portion.

[0015] Multiple threaded through holes are provided circumferentially, and corresponding bolts are matched to enhance the connection strength between the auxiliary tooling and the ejector pin.

[0016] Preferably, the tip of the ejector pin is located inside the tip of the tapered positioning part.

[0017] The ejector pin tip is located inside the tip of the conical positioning part, which can prevent the ejector pin tip from extending out during the clamping process. The two ejector pin tips will first abut against each other to prevent the two auxiliary tools from getting closer and affecting the clamping effect.

[0018] Beneficial effects: By adding this auxiliary tooling to the ejector pin, the minimum diameter of the tapered positioning part is greater than the maximum diameter of the ejector pin, which enables the runout gauge to detect rims with larger center bore diameters, thus improving the applicability of the runout gauge. Moreover, this auxiliary tooling does not require any damage to the existing runout gauge structure, making it easy to disassemble and use, and is inexpensive. Attached Figure Description

[0019] Figure 1 This is an axial sectional view of the auxiliary tooling; Figure 2 This is an axial sectional view of the auxiliary tooling in use; Figure 3 This is a diagram illustrating the usage status of this auxiliary tooling. Figure 1 .

[0020] Figure 4This is a diagram illustrating the usage status of this auxiliary tooling. Figure 2 . Detailed Implementation

[0021] As shown in the figure, the auxiliary tooling for the yaw meter of this utility model includes a tooling body 1. One end of the tooling body 1 is provided with a mounting part 3 that is connected to the ejector pin 2 of the yaw meter, and the other end is provided with a conical positioning part 4 that contacts and cooperates with the inner wall of the center hole of the rim. The minimum diameter of the conical positioning part 4 is greater than the maximum diameter of the ejector pin 2.

[0022] The mounting part 3 can be cylindrical or prismatic, or have a non-conical structure, to facilitate the removal of the entire auxiliary tooling and its connection with the ejector pin 2. Regardless of the structure, the projection of the mounting part 3 in the plane perpendicular to the axial direction of the tooling body 1 cannot exceed the projection of the conical positioning part 4 in that plane. For a cylindrical mounting part 3, its diameter cannot be greater than the maximum diameter of the conical positioning part 4. In this way, the center hole of the rim will pass directly through the entire auxiliary tooling after passing through the conical positioning part 4, indicating that a larger auxiliary tooling needs to be replaced. Instead, it will not abut against the end face of the mounting part 3 after passing through the conical positioning part 4 (end face). This makes it seem as if the rim has not passed through the auxiliary tooling and is being held by it. However, the auxiliary tooling on both sides cannot effectively clamp the rim by relying solely on the plane of the mounting part 3, and the rim cannot effectively follow the ejector pin 2 to rotate.

[0023] The mounting part 3 is provided with threaded through holes 5 and matching bolts or screws. The tooling body 1 and the ejector pin 2 are fixed by bolts. Multiple threaded through holes 5 can be provided circumferentially in the mounting part 3 to increase the number of bolts and improve the connection strength between the bolts and the ejector pin 2.

[0024] The conical positioning part 4 can be frustum-shaped or conical. The conical positioning part 4 is coaxially arranged with the mounting part 3. The diameter of the conical positioning part 4 gradually decreases as it moves away from the mounting part 3, and the end of the conical positioning part 4 with the largest diameter is located inside the largest diameter section of the ejector pin 2. The tip of the ejector pin 2 is located inside the tip of the conical positioning part 4.

[0025] The following describes a specific auxiliary tooling design method, which can adapt to rims with common center bore diameters between Ø32mm and Ø48mm on the market: The tapered positioning part 4 of the auxiliary tooling has an external taper of 90°. The maximum and minimum diameters of the tapered positioning part 4 are Ø54mm and Ø28mm, respectively. This tapered diameter variation range can cover the variation range of the center hole diameter of the wheel rim. The tooling body 1 has a cavity inside that matches the ejector pin 2. The mounting part 3 is fixed to the ejector pin 2 by M6 screws.

Claims

1. An auxiliary fixture for a yaw meter, characterized in that: The tool body (1) includes a mounting part (3) at one end of the tool body (1) that is connected to the pin (2) of the yaw meter, and a tapered positioning part (4) at the other end that is in contact with the inner wall of the center hole of the rim. The minimum diameter of the tapered positioning part (4) is greater than the maximum diameter of the pin (2).

2. The auxiliary tooling according to claim 1, characterized in that: The maximum diameter end of the tapered positioning part (4) is located inside the maximum diameter section of the ejector pin (2).

3. The auxiliary tooling according to claim 1, characterized in that: The mounting part (3) is cylindrical and its diameter is no greater than the maximum diameter of the conical positioning part (4).

4. The auxiliary tooling according to claim 1, characterized in that: The conical positioning part (4) is frustum-shaped, and its diameter gradually decreases as it moves away from the mounting part (3).

5. The auxiliary tooling according to claim 1, characterized in that: The tool body (1) is fitted onto the ejector pin (2), and the mounting part (3) is provided with a threaded through hole (5) and bolts or screws for fixing the two.

6. The auxiliary tooling according to claim 5, characterized in that: The threaded through holes (5) are provided in multiple directions around the mounting part (3).

7. The auxiliary tooling according to claim 1, characterized in that: The tip of the ejector pin (2) is located inside the tip of the conical positioning part (4).

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