Pulling-out force testing device for wheel bearing
By simplifying the structure of the wheel bearing pull-out force test device and utilizing the combination of a base, a fixed bracket, a tension sensor and a stepped shaft pull-out shaft, the complexity and error problems of the existing device are solved, and an efficient and low-cost bearing pull-out force test is achieved.
Patent Information
- Application Number
- CN202422932152.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-11-28
AI Technical Summary
The existing bearing pull-off force testing device has a complex structure and requires a tensioning mechanism, which increases the difficulty of operation and maintenance costs, and also causes test complexity and errors.
A wheel bearing pull-out force test device that does not require a tensioning mechanism is used. It includes a base, a fixing bracket, a tension sensor, a screw and a stepped shaft pull-out shaft. Linear guide rail assemblies and guide rods are used to ensure stable connection and precise guidance. An integrated tension sensor is used to display the tension value in real time.
The device structure is simplified, the cost is reduced, the test efficiency and accuracy are improved, the error is reduced, and the stable connection between the bearing and the pull-off shaft and the accuracy of the measurement are ensured.
Smart Images
Figure CN223376811U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of wheel testing, and in particular relates to a wheel bearing pull-off force testing device. Background Art
[0002] When installing electric vehicle wheels to the vehicle body, bearings are required to reduce friction. If the interference fit between the bearing and the wheel hub is insufficient and fails to meet established standards, the bearings, if subjected to significant axial forces during driving, are at high risk of unexpected separation from the wheel hub. Therefore, to ensure wheel assembly quality meets requirements, various post-assembly tests are essential. Testing the pull-out force of the wheel bearing is a key indicator.
[0003] Patent No. ZL2016202716646 discloses a pull-out force detection device for the front wheel hub bearing of an electric vehicle, comprising a rotating handwheel, a square connecting block, a tensile tester and a concave connecting block, wherein the rotating handwheel, the square connecting block, the tensile tester and the concave connecting block are placed on a base plate; the rotating handwheel and the square connecting block are rotatably connected via a handwheel tightening shaft, the square connecting block and the tensile tester are connected via a threaded shaft, and the tensile tester and the concave connecting block are fixedly connected, and the handwheel tightening shaft, the threaded shaft and the front wheel hub bearing are in a coaxial linear position; a tension sleeve is provided at the end of the concave connecting block for fixing to one end of the front wheel hub bearing, and a tensile force is generated between the detection device and the front wheel hub bearing by rotating the rotating handwheel, and the magnitude of the tensile force is displayed on the tensile tester until the tensile force is greater than the pull-out force between the front wheel hub and the bearing, and the bearing slowly detaches from the wheel hub. The existing bearing pull-off force testing device requires a tensioning mechanism to connect the tension sensor to the bearing at the center hole of the wheel bearing. Its structure is often relatively complex, which not only increases the difficulty of operation, but also increases the maintenance cost, and increases the complexity and uncertainty of the test. Summary of the Invention
[0004] In response to the problems existing in the prior art, the utility model provides a wheel bearing pull-out force testing device, which does not require a tensioning mechanism, has a simple structure and low cost; the testing efficiency and accuracy are high, which not only ensures a stable connection between the pull-out shaft and the bearing, but also effectively avoids the use of traditional tensioning mechanisms, reduces the complexity and cost of the device, and reduces additional errors.
[0005] The utility model is implemented as follows: a wheel bearing pull-off force testing device includes a base, a first fixing bracket and a second fixing bracket are arranged on the mounting end surface of the base with a relative spacing, a tension sensor is arranged between the first fixing bracket and the second fixing bracket, a threaded sleeve is arranged in the first fixing bracket, a screw is arranged through the threaded sleeve, one end of the screw is connected to the tension sensor, and the other end is provided with a force applying handwheel;
[0006] The outer end face of the second fixed bracket is provided with a wheel hub with a bearing installed inside. A pull-off shaft is provided through the bearing hole of the wheel hub. The pull-off shaft is a stepped shaft. The stepped table surface of the pull-off shaft fits on the inner end face of the bearing of the wheel hub. The small diameter section of the pull-off shaft passes through the second fixed bracket and is connected to the tension sensor.
[0007] Furthermore, a linear guide assembly is mounted on the base on the wheel hub mounting side. A guide clamp is installed on the slider of this linear guide assembly. A movable bracket for clamping the wheel hub is provided on the upper end surface of the slider. This movable bracket has a mounting hole for the pull-out shaft. This movable bracket makes installation and removal of the wheel hub more flexible and convenient. Operators can adjust the position of the movable bracket as needed to accommodate wheel hubs of different sizes and shapes, thereby improving clamping efficiency and processing flexibility.
[0008] Furthermore, a guide rod is disposed between the first and second fixed brackets. A guide seat is mounted on the guide rod between the first fixed bracket and the tension sensor, and the tension sensor is mounted on the guide seat. The provision of the guide rod ensures stable movement of the guide seat between the first and second fixed brackets. This stable movement path helps reduce errors caused by shaking or offset, thereby improving the stability and accuracy of the entire system.
[0009] Furthermore, the connecting end of the screw rod passes through the guide seat and connects to the tension sensor. The screw rod within the guide seat forms an optical axis segment, and a bearing is provided between the guide seat and the optical axis segment. The bearing arrangement ensures stable rotation or movement of the screw rod's optical axis segment within the guide seat, reducing errors caused by friction or shaking. This stability helps maintain the connection precision between the tension sensor and the screw rod, thereby improving the accuracy of the entire measurement system.
[0010] Furthermore, two guide rods are provided, one on each side of the tension sensor. These two guide rods form a stable support structure, allowing the tension sensor to distribute force more evenly across both sides when subjected to force. This prevents errors or damage caused by excessive force on one side, ensuring that the tension sensor always maintains the correct orientation during movement. This precise guidance helps reduce errors caused by directional deviation and improves measurement accuracy.
[0011] Furthermore, the axis of the screw and the axis of the pull-off shaft are arranged colinearly.
[0012] Furthermore, the tension sensor is connected to a screen display via a data line to display the force value fed back by the tension sensor.
[0013] Furthermore, the wheel hub is a drum-type wheel hub, and a nylon retaining ring corresponding to the inner ring of the wheel hub is provided on the movable bracket facing the wheel hub side.
[0014] The advantages and technical effects of this utility model include: The adoption of the above-mentioned technical solution eliminates the need for a tensioning mechanism, resulting in a simple structure and low cost; high testing efficiency and accuracy are achieved. By connecting the pull-off shaft and the screw, a tension sensor is cleverly integrated to accurately display the tension value in real time. When the bearing reaches the pull-off point, the pull-off force of the wheel and bearing can be directly measured.
[0015] The pull-off shaft adopts a stepped shaft form, and its stepped table surface fits tightly on the inner end face of the bearing of the wheel hub, which not only ensures a stable connection between the pull-off shaft and the bearing, but also effectively avoids the use of traditional tensioning mechanism, reduces the complexity and cost of the device, and reduces additional errors. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a three-dimensional schematic diagram of the overall structure provided by an embodiment of the utility model;
[0017] Figure 2 It is a schematic cross-sectional view of the overall structure provided by an embodiment of the present utility model.
[0018] In the figure: 1. Base; 2. First fixed bracket; 3. Second fixed bracket; 4. Tension sensor; 5. Threaded sleeve; 6. Screw; 7. Force handwheel; 8. Hub; 9. Pull-off shaft; 9-1. Stepped table; 9-2. Small diameter section; 10. Linear guide rail assembly; 11. Guide rail clamp; 12. Movable bracket; 12-1. Mounting hole; 13. Guide rod; 14. Guide seat; 15. Nylon retaining ring. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0020] It should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.
[0021] like Figure 1 and Figure 2As shown, the present application provides a wheel bearing pull-out force testing device, comprising a base 1, a first fixed bracket 2 and a second fixed bracket 3 are arranged on the mounting end surface of the base 1 at relative intervals, a tension sensor 4 is arranged between the first fixed bracket 2 and the second fixed bracket 3, a threaded sleeve 5 is arranged in the first fixed bracket 2, a screw 6 is arranged through the threaded sleeve 5, one end of the screw 6 is connected to the tension sensor 4, and the other end is provided with a force handwheel 7; specifically, the tension sensor 4 is connected to the screen display via a data cable to display the force value feedback by the tension sensor 4.
[0022] The outer end face of the second fixed bracket 3 is provided with a hub 8 with a bearing mounted therein. A pull-out shaft 9 is provided through the bearing hole of the hub 8. The pull-out shaft 9 is a stepped shaft, with a stepped surface 9-1 of the pull-out shaft 9 abutting against the inner end face of the bearing of the hub 8. The small-diameter section 9-2 of the pull-out shaft 9 passes through the second fixed bracket 3 and is connected to the tension sensor 4. Specifically, the axis of the screw 6 is collinear with the axis of the pull-out shaft 9.
[0023] Furthermore, a linear guide assembly 10 is provided on the base 1 on the mounting side of the wheel hub 8. A guide clamp 11 is provided on the slider of the linear guide assembly 10. A movable bracket 12 for clamping the wheel hub 8 is provided on the upper end surface of the slider of the linear guide assembly 10. The movable bracket 12 is provided with a mounting hole 12-1 for the pull-off shaft 9 to pass through. The movable bracket 12 makes the installation and removal of the clamping wheel hub 8 more flexible and convenient. The operator can adjust the position of the movable bracket 12 as needed to accommodate wheel hubs 8 of different sizes and shapes, thereby improving clamping efficiency and processing flexibility.
[0024] Furthermore, a guide rod 13 is provided between the first fixed bracket 2 and the second fixed bracket 3. A guide seat 14 is sleeved on the guide rod 13, located between the first fixed bracket 2 and the tension sensor 4. The tension sensor 4 is mounted on the guide seat 14. The provision of the guide rod 13 ensures stable movement of the guide seat 14 between the first fixed bracket 2 and the second fixed bracket 3. This stable movement path helps reduce errors caused by shaking or offset, thereby improving the stability and accuracy of the entire system. Preferably, two guide rods 13 are provided, one on each side of the tension sensor 4. The two guide rods 13, one on each side of the tension sensor 4, form a stable support structure. When subjected to force, the tension sensor 4 can distribute the force more evenly to both sides, avoiding errors or damage caused by excessive force on one side and ensuring that the tension sensor 4 always maintains the correct direction during movement. This precise guidance helps reduce errors caused by directional deviation and improves measurement accuracy. Specifically, the connecting end of the screw rod 6 passes through the guide seat 14 and connects to the tension sensor 4. The screw rod 6 located within the guide seat 14 forms an optical axis segment, and a bearing is provided between the guide seat 14 and the optical axis segment. The bearing ensures stable rotation or movement of the optical axis segment of the screw rod 6 within the guide seat 14, reducing errors caused by friction or shaking. This stability helps maintain the connection precision between the tension sensor 4 and the screw rod 6, thereby improving the accuracy of the entire measurement system.
[0025] Furthermore, the hub 8 is a drum hub 8, and a nylon retaining ring 15 corresponding to the inner ring of the hub 8 is provided on the movable bracket 12 facing the hub 8. When the hub 8 is a disc hub 8, the nylon retaining ring 15 is not required. This solution can take into account the bearing tension test of both drum hubs 8 and disc hubs 8.
[0026] Operation steps: 1. Loosen the guide rail clamp 11, place the wheel between the movable bracket 12 and the second fixed bracket 3, move the slider movable bracket 12 to clamp and position the wheel hub 8, and lock the slider to fix the wheel hub 8 through the guide rail clamp 11. 2. Install the pull-off shaft 9 into the wheel bearing, pass through the wheel bearing hole through the mounting hole 12-1, and connect it to the tension sensor 4. 3. Turn the force handwheel 7 to rotate the screw 6. Under the action of the threaded sleeve 5, the screw 6 drives the guide seat 14 and the tension sensor 4 to move away from the wheel hub 8. 4. The stepped table 9-1 of the pull-off shaft 9 interacts with the inner end face of the bearing of the wheel hub 8. As the tension sensor 4 moves, observe the change in force value and record the pull-off force value.
[0027] Due to the adoption of the above technical solution, there is no need to equip a tensioning mechanism, the structure is simple, the cost is low, and the test efficiency and accuracy are high. Through the connection between the pull-off shaft 9 and the screw 6, the tension sensor 4 is cleverly integrated therein to display the tension value in real time and accurately. When the bearing reaches the pull-off point, the pull-off force after the wheel and the bearing are matched can be directly measured. The pull-off shaft 9 adopts the form of a stepped shaft, and its stepped table 9-1 fits tightly on the inner end face of the bearing of the wheel hub 8, which not only ensures a stable connection between the pull-off shaft 9 and the bearing, but also effectively avoids the use of a traditional tensioning mechanism, reduces the complexity and cost of the device, and reduces additional errors.
[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A wheel bearing pull-off force testing device, characterized in that: The invention comprises a base, wherein a first fixing bracket and a second fixing bracket are arranged on a mounting end surface of the base relative to each other, a tension sensor is arranged between the first fixing bracket and the second fixing bracket, a threaded sleeve is arranged in the first fixing bracket, a screw is arranged through the threaded sleeve, one end of the screw is connected to the tension sensor, and the other end is provided with a force applying hand wheel; The outer end face of the second fixed bracket is provided with a wheel hub with a bearing installed inside. A pull-off shaft is provided through the bearing hole of the wheel hub. The pull-off shaft is a stepped shaft. The stepped table surface of the pull-off shaft fits on the inner end face of the bearing of the wheel hub. The small diameter section of the pull-off shaft passes through the second fixed bracket and is connected to the tension sensor.
2. The wheel bearing pull-off force testing device according to claim 1, characterized in that: A linear guide rail assembly is provided on the base located on the hub mounting side, a guide rail clamp is provided on the slider of the linear guide rail assembly, a movable bracket for clamping the hub is provided on the upper end surface of the slider in the linear guide rail assembly, and a mounting hole for the pull-out shaft to pass through is provided on the movable bracket.
3. The wheel bearing pull-off force testing device according to claim 1 or 2, characterized in that: A guide rod is provided between the first fixing bracket and the second fixing bracket. A guide seat is sleeved on the guide rod located between the first fixing bracket and the tension sensor. The tension sensor is provided on the guide seat.
4. The wheel bearing pull-out force testing device according to claim 3, characterized in that: The connecting end of the screw rod passes through the guide seat and is connected to the tension sensor. The screw rod located in the guide seat is an optical axis segment. A bearing is provided between the guide seat and the optical axis segment.
5. The wheel bearing pull-out force testing device according to claim 3, characterized in that: There are two guide rods, and the two guide rods are respectively located on both sides of the tension sensor.
6. The wheel bearing pull-out force testing device according to claim 1, characterized in that: The axis of the screw rod is arranged collinearly with the axis of the pull-off shaft.
7. The wheel bearing pull-out force testing device according to claim 1, characterized in that: The tension sensor is connected to the screen display via a data line to display the force value fed back by the tension sensor.
8. The wheel bearing pull-out force testing device according to claim 2, characterized in that: The wheel hub is a drum-type wheel hub, and a nylon retaining ring corresponding to the inner ring of the wheel hub is provided on the movable bracket facing the wheel hub side.