Test tool for sliding bearing roller
By designing a sliding bearing roller test fixture with a coaxially arranged test workpiece and bearing, the problems of roller high-temperature melting and deviation in traditional test fixtures are solved, and efficient and reliable testing of the roller is achieved.
Patent Information
- Application Number
- CN202423047218.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-10
AI Technical Summary
Traditional sliding bearing roller test fixtures are prone to melting due to high temperatures during testing, and the rollers are prone to deviation during testing.
A test fixture for a sliding bearing roller is designed, which uses coaxially arranged test workpieces 1 and 2. A bearing that matches the roller shaft core is provided on the inner side and is connected by a screw and a nut. The long shaft and the sleeve have a clearance fit, and the bearing and the roller shaft core have a clearance fit to avoid sliding friction from turning into rolling friction.
It effectively prevents the roller from melting due to high temperature during the test, improves the smoothness and reliability of the test, and reduces friction damage.
Smart Images
Figure CN223485498U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a testing fixture for a sliding bearing roller, belonging to the field of engineering testing. Background Technology
[0002] Traditional testing fixtures for sliding bearing rollers involve inserting the small end of one fixture component into the bearing bore of the roller, while another fixture component is inserted into the bearing bore of the roller at the other end. A screw is then fitted onto the roller, and the other end is tightened with a bolt. The fixture is then mounted on a test jig for testing. The fixture components on both sides have identical structures. This installation results in two mating lines within the inner bore of the roller's sliding bearing. Because the testing process involves sliding friction between the inner bore of the roller's sliding shaft and the testing fixture, this friction quickly causes the sliding shaft bore to overheat, ultimately melting and causing the roller to fail.
[0003] In addition, during testing, the parts of the traditional sliding bearing roller test fixture need to be close to the end face of the roller in order to fix the roller. During the test, the roller will also deviate to one side. In addition, due to the effect of friction, the end face of the roller may melt and fail. Summary of the Invention
[0004] The technical problem to be solved by this invention is that existing rollers are prone to melting during testing.
[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:
[0006] A testing fixture for a sliding bearing roller includes a test workpiece 1 and a test workpiece 2 arranged coaxially. The inner sides of the test workpiece 1 and the test workpiece 2 are respectively provided with bearings that cooperate with the shaft cores on both sides of the roller being tested. The test workpiece 1 is provided with a long shaft that passes through the roller being tested and cooperates with the bushing inside the test workpiece 2.
[0007] Preferably, the test workpiece one and the test workpiece two are connected by a screw and a nut.
[0008] Preferably, the long shaft of test workpiece one and the bushing of test workpiece two are clearance-fitted.
[0009] Preferably, the bearing is clearance-fitted with the shaft of the roller.
[0010] This invention transforms the original two halves of the shaft into a single unit, making the roller smoother in the axial direction. A bearing is pre-embedded on the end face of the test workpiece, forming a single unit between the tested roller and the inner ring of the bearing. The inner ring of the bearing is provided with clearance, and the test workpiece is also provided with clearance on the other side of the shaft. This transforms the sliding friction between the test workpiece and the roller into rolling friction between the inner ring of the bearing and the bearing balls, preventing the roller from melting due to high temperatures during the test.
[0011] Compared with the prior art, the present invention has the following beneficial effects:
[0012] 1. To achieve the testing objective and inspect the roller, traditional test workpiece design and methods often fail to complete the test items before the roller is damaged, thus failing to achieve the experimental objective.
[0013] 2. Traditional testing requires daily removal of the workpiece and rollers for lubrication during the testing process. Since the experiment needs to be conducted continuously, daily lubrication requires interrupting the experiment, which cannot meet the experimental requirements.
[0014] 3. This design can not only be used for roller testing, but also be put into practice in application fields. Attached Figure Description
[0015] Figure 1 An installation diagram of the testing fixture provided by this utility model;
[0016] Figure 2 This is a schematic diagram showing the installation of the test workpiece and the roller being tested.
[0017] Figure 3 This is a schematic diagram of the test workpiece one;
[0018] Figure 4 This is a schematic diagram of the test workpiece two. Detailed Implementation
[0019] To make this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings.
[0020] Example
[0021] like Figure 1-4 As shown, this utility model provides a testing fixture for a sliding bearing roller, which includes a test workpiece 1 2 and a test workpiece 2 6 coaxially arranged. The inner sides of the test workpiece 1 2 and the test workpiece 2 6 are respectively provided with bearings 3 that cooperate with the shaft cores on both sides of the roller 4 being tested. Figure 3 As shown, a long shaft is provided on the test workpiece 2, which passes through the side roller 4 and the bushing inside the test workpiece 6 (e.g., Figure 4 (as shown) to complement each other.
[0022] Test workpiece 1 (2) and test workpiece 2 (6) are connected by screw 1 and nut 7.
[0023] The long shaft of test workpiece 1 (2) is fitted with the bushing of test workpiece 2 (6) with a clearance fit. The bearing 3 is fitted with the shaft core of the roller 4 being tested with a clearance fit.
[0024] The long shaft of test workpiece one is a single piece. The entire shaft passes directly through the shaft core hole of the roller and is inserted into the bushing of test workpiece two. This eliminates the presence of a mating line, resulting in smoother operation between the test workpiece and the roller. Holes with a step are drilled inside test workpieces one and two on their radial surfaces. The bearing is embedded in these holes and positioned using its outer diameter. The step provides clearance for the bearing's inner ring, allowing it to rotate. When the tested roller is in operation, its end face is in close contact with the bearing's inner diameter. As the roller rotates, it carries the bearing's inner ring along with it, transforming the sliding friction between the roller and the test workpiece into rolling friction between the bearing's inner ring and the bearing balls.
[0025] During testing, first install the two bearings 6 into test workpiece 1 2 and test workpiece 2 6 respectively. Then, insert the roller 4 to be tested through the shaft of test workpiece 1 2. Next, insert test workpiece 2 6 into the shaft of test workpiece 1. Finally, pass the screw 1 through test workpiece 1 2 and tighten it with the nut 7. Install the assembled components in the equipment fixture 5 and start the test.
Claims
1. A testing fixture for a sliding bearing roller, characterized in that, The test workpiece 1 (2) and test workpiece 2 (6) are coaxially arranged. The inner sides of the test workpiece 1 (2) and test workpiece 2 (6) are respectively provided with bearings (3) that cooperate with the shaft cores on both sides of the roller (4) being tested. The test workpiece 1 (2) is provided with a long shaft that passes through the roller (4) being tested and cooperates with the bushing inside the test workpiece 2 (6).
2. The testing fixture for the sliding bearing roller as described in claim 1, characterized in that, The test workpiece one (2) and the test workpiece two (6) are connected by a screw (1) and a nut (7).
3. The testing fixture for the sliding bearing roller as described in claim 1, characterized in that, The long axis of the test workpiece one (2) is clearance-fitted with the bushing of the test workpiece two (6).
4. The testing fixture for the sliding bearing roller as described in claim 1, characterized in that, The bearing (3) is clearance-fitted with the shaft of the roller (4).