Motorcycle spoke wheel hub size detection tool

Abstract

The utility model discloses a kind of hub size detection tool in spoke type motorcycle wheel, including positioning tool and detection tool, positioning tool and detection tool are respectively set in the both ends of hub, the lower end of detection tool is against the upper end surface of screw foot on hub end surface, there is the measuring hole for the shaft part of hub to expose in the middle position of detection tool.The utility model can use flat ruler to detect by changing the end surface position of detection.

Description

Technical Field

[0001] This utility model relates to the field of testing tooling technology, and more specifically, to a tooling for testing the dimensions of the hub of a motorcycle spoked wheel. Background Technology

[0002] Motorcycle wheels, as a crucial component of motorcycles, are core parts supporting the vehicle's weight and connecting the transmission and braking systems. Based on their structure, wheels can be divided into two types: integral wheels and spoked wheels. Spoked wheels are assembled by molding the hub and rim separately, joined together by spokes. Bearings and the main shaft are mounted on both sides of the hub, connecting to the transmission system. Currently, mid-to-high-end motorcycles generally use disc brakes, with the brake disc fixed to the outside of the hub. Braking is achieved by the calipers of the braking system floating and clamping the brake disc. The relative dimensions of the brake disc mounting surface, bearing end face, and shaft end face directly affect the assembly of the brake disc and are critical dimensions in wheel manufacturing. Currently, the relative dimensions from the brake disc surface to the shaft end face are generally measured using the brake disc surface as a reference and a straightedge. However, due to the distance between the two, the straightedge may not be placed stably, potentially leading to deviations. Furthermore, some hub brake discs have positioning steps, which can affect the placement of the straightedge, thus impacting the quality of the measurement. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a tooling for detecting the size of the hub of a motorcycle spoked wheel.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model discloses a fixture for measuring the size of the center hub of a motorcycle spoked wheel, including a positioning fixture and a measuring fixture. The positioning fixture and the measuring fixture are respectively disposed at both ends of the center hub. The lower end of the measuring fixture abuts against the upper end face of the screw foot on the end face of the center hub. The measuring fixture has a measuring hole in the middle position for the shaft portion of the center hub to be exposed.

[0006] Furthermore, the positioning fixture is equipped with a positioning component, which is located on the side of the positioning fixture closer to the center hub.

[0007] Furthermore, the positioning component includes a guide portion and a positioning portion connected together. The positioning portion is connected to the positioning fixture. The guide portion has a frustum-shaped structure, and the diameter of the end of the guide portion near the positioning portion is larger than the diameter of the end away from the positioning portion.

[0008] Furthermore, the diameter of the measuring hole is 5-10 mm larger than the diameter of the bearing hole on the shaft.

[0009] Furthermore, a positioning hole is provided at one end of the testing fixture near the central hub. The positioning hole is connected to the measuring hole, and the diameter of the positioning hole is larger than that of the measuring hole.

[0010] Furthermore, the testing fixture includes a central block, a support block one, and a support block two. Support block one and support block two are connected to the outer periphery of the central block, and support block one and support block two are located on both sides of the central block.

[0011] The beneficial effect of this utility model is that it transforms the dimensional inspection between the upper end face of the screw foot and the upper end face of the shaft into the dimensional inspection between the upper end face of the tooling and the upper end face of the shaft, thereby enabling direct inspection using a straightedge and ensuring inspection quality. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a tooling for detecting the size of the center hub of a motorcycle spoked wheel in this embodiment;

[0013] Figure 2 This is a cross-sectional view of a tooling for detecting the center hub size of a motorcycle spoked wheel in this embodiment;

[0014] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0015] Figure 4 This is a schematic diagram of one type of detection fixture in this embodiment.

[0016] Reference numerals: 1. Positioning fixture; 2. Positioning component; 3. Inspection fixture; 4. Measuring hole; 5. Positioning hole; 6. Center block; 7. Support block one; 8. Support block two; 9. Center hub; 10. Screw foot; 11. Brake disc positioning step; 12. Shaft; 13. Guide part; 14. Positioning part. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figures 1-4 As shown, a fixture for measuring the dimensions of a motorcycle spoked wheel hub includes a positioning fixture 1 and a measuring fixture 3, which are respectively disposed at both ends of the hub 9. Specifically, the positioning fixture 1 is placed horizontally, with the end of the hub 9 without a brake disc placed on the positioning fixture 1, and the measuring fixture 3 placed at the end of the hub 9 where the brake disc is mounted to measure the dimensions of that end.

[0019] The lower end of the inspection fixture 3 abuts against the upper end face of the screw base 10 on the end face of the hub 9. Both the upper and lower end faces of the inspection fixture 3 are horizontal and parallel. A measuring hole 4 is provided in the middle of the inspection fixture 3. The diameter of the measuring hole 4 is 5-10 mm larger than the diameter of the bearing hole on the shaft 12, so that the shaft 12 of the hub 9 is exposed, allowing a straightedge to pass through the measuring hole 4 and abut against the upper end face of the shaft 12 for inspection.

[0020] The measurement of the dimension between the upper end face of the screw foot 10 and the upper end face of the shaft 12 is transformed into the measurement of the dimension between the upper end face of the fixture 3 and the upper end face of the shaft 12, so that a straightedge can be used directly for measurement and the measurement results are reliable.

[0021] At the same time, the straightedge can be inserted into the bearing hole of the shaft 12 to check the dimensional relationship between the bearing end face installed in the bearing hole and the upper end face of the inspection fixture 3.

[0022] After the inspection fixture 3 is processed by surface grinding, the flatness of the upper and lower end faces and the parallelism of the two faces are ≤ grade 7 to ensure the accuracy of the inspection results.

[0023] like Figure 2 , Figure 3 As shown, a positioning component 2 is provided on the positioning fixture 1, located on the side of the positioning fixture 1 near the hub 9. The positioning component 2 can be integrally formed with the positioning fixture 1, or it can be detachably installed on the positioning fixture 1 to allow for selection of installation according to different opening sizes of the hub 9. The positioning component 2 includes a guide portion 13 and a positioning portion 14 connected to each other, with the positioning portion 14 connected to the positioning fixture 1. The guide portion 13 has a frustum-shaped structure, and the diameter of the end of the guide portion 13 near the positioning portion 14 is larger than the diameter of the end away from the positioning portion 14, thereby achieving a guiding function and making it easier for the opening of the hub 9 to fit onto the positioning component 2. The positioning portion 14 has a cylindrical structure, and the size of the positioning portion 14 matches the opening size of the hub 9, thereby achieving positioning.

[0024] On some of the screw feet 10 of the hub 9, a brake disc positioning step 11 protrudes upward on the side near the shaft portion 12. A positioning hole 5 needs to be made at the end of the inspection fixture 3 near the hub 9. The diameter of the positioning hole 5 must be large enough to accommodate the brake disc positioning step 11 on the screw foot 10, ensuring that the lower end face of the inspection fixture 3 avoids the brake disc positioning step 11, and that the bottom of the inspection fixture 3 can make horizontal contact with the top of the screw foot 10. The positioning hole 5 is connected to the measuring hole 4, and the diameter of the positioning hole 5 is larger than that of the measuring hole 4.

[0025] like Figure 4As shown, the testing fixture 3 has a circular end face shape obtained by removing portions from both sides, thus forming a structure including a central block 6, a first support block 7, and a second support block 8. The first support block 7 and the second support block 8 are connected to the outer periphery of the central block 6. The first support block 7 and the second support block 8 are located on opposite sides of the central block 6, ensuring effective support on both sides and guaranteeing that the central block 6 can be stably placed horizontally on the central hub 9, thus ensuring the accuracy of the testing results. The area of ​​the second support block 8 is larger than that of the first support block 7; the first support block 7 can cover one screw head 10, and the second support block 8 can cover one or two screw heads 10.

[0026] A spirit level is placed on the inspection fixture 3 to check the levelness of the upper surface of the screw base 10. By changing the placement position of the inspection fixture 3 on the hub 9 so that the inspection fixture 3 covers different screw bases 10, the levelness of the upper surface of each screw base 10 can be checked.

[0027] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A fixture for measuring the dimensions of the center hub of a motorcycle spoked wheel, characterized in that, It includes a positioning fixture (1) and a testing fixture (3), which are respectively set at both ends of the hub (9). The lower end of the testing fixture (3) abuts against the upper end face of the screw foot (10) on the end face of the hub (9). The testing fixture (3) has a measuring hole (4) in the middle position for the shaft part (12) of the hub (9) to be exposed.

2. The fixture for detecting the center hub size of a motorcycle spoked wheel according to claim 1, characterized in that, The positioning fixture (1) is provided with a positioning component (2), which is located on the side of the positioning fixture (1) near the center hub (9).

3. The fixture for detecting the center hub size of a motorcycle spoked wheel according to claim 2, characterized in that, The positioning component (2) includes a guide part (13) and a positioning part (14) connected to each other. The positioning part (14) is connected to the positioning fixture (1). The guide part (13) has a frustum-shaped structure. The diameter of the guide part (13) near the positioning part (14) is larger than the diameter of the end away from the positioning part (14).

4. The fixture for detecting the center hub size of a motorcycle spoked wheel according to claim 1, characterized in that, The diameter of the measuring hole (4) is 5-10 mm larger than the diameter of the bearing hole on the shaft (12).

5. The fixture for detecting the center hub size of a motorcycle spoked wheel according to claim 1, characterized in that, The testing fixture (3) has a positioning hole (5) at one end near the hub (9). The positioning hole (5) is connected to the measuring hole (4), and the diameter of the positioning hole (5) is larger than that of the measuring hole (4).

6. The fixture for detecting the center hub size of a motorcycle spoked wheel according to claim 1, characterized in that, The testing fixture (3) includes a central block (6), a first support block (7) and a second support block (8). The first support block (7) and the second support block (8) are connected to the outer periphery of the central block (6) respectively, and the first support block (7) and the second support block (8) are located on both sides of the central block (6).

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