A testing fixture for automobile wheel hubs

Abstract

This utility model discloses an automotive wheel hub testing fixture, including a fixed platform with an outer frame fixedly connected to it. A detection mechanism and a fixture connection mechanism are arranged on the fixed platform, with the detection mechanism located at the side of the fixture connection mechanism. This automotive wheel hub testing fixture, through a heating mechanism in a fourth chamber and a cooling mechanism in a third chamber, combined with unidirectional ventilation holes in the second and third partitions, can simulate extreme temperature environments. Real-time monitoring and feedback are achieved using temperature sensors, adapting to performance testing of wheel hubs under different climatic conditions such as high-temperature exposure and low-temperature freezing. Simultaneously, the rubber friction stripes on the outer side of the wheel simulate road surface friction, and a pressure sensor monitors the contact pressure in real time, reproducing the wheel hub's stress state under different driving loads. This enables comprehensive testing of both temperature and load variables, covering complex scenarios in actual use, thereby detecting the quality of the wheel hub.

Description

Technical Field

[0001] This utility model relates to the field of automotive wheel hub technology, specifically an automotive wheel hub testing fixture. Background Technology

[0002] In today's booming automotive industry, the quality of car wheels, as a key component connecting the brake drum, disc, and axle, directly affects vehicle driving safety, handling stability, and ride comfort. Therefore, testing car wheels is of great significance. The tests aim to evaluate their performance, durability, and safety, ensuring they meet relevant standards and consumer needs.

[0003] Existing testing fixtures are insufficient to fully replicate the complex environments faced by automotive wheel hubs in real-world driving. In actual use, wheel hubs must withstand extreme temperatures under varying climatic conditions, as well as complex loads resulting from road conditions and load variations during vehicle operation. However, most existing fixtures can only perform tests under single environmental factors or simple load conditions, failing to simultaneously simulate the combined effects of temperature and load. This leads to biased performance assessments of wheel hubs in real-world, complex scenarios and makes it difficult to detect potential quality issues arising from the coupled effects of multiple factors.

[0004] To address these issues, this invention provides a testing fixture for automotive wheel hubs. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a testing fixture for automotive wheel hubs, which solves the aforementioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a testing fixture for automobile wheel hubs, comprising a fixed platform, an outer frame fixedly connected to the fixed platform, a testing mechanism and a fixture connection mechanism provided on the fixed platform, the testing mechanism being located at the side of the fixture connection mechanism, the fixed platform serving as the installation foundation for the entire fixture, fixing all components such as the outer frame, testing mechanism, and fixture connection mechanism, providing stable support, and ensuring the overall structural stability during testing.

[0007] The tooling connection mechanism includes a connecting frame and a hub. The upper end of the connecting frame is provided with a sliding groove, and a moving groove is opened on the connecting frame. A hydraulic rod is fixedly connected to the fixed platform, and a first connecting member is fixedly connected to the output end of the hydraulic rod. The hydraulic rod drives the first connecting member to slide along the sliding groove, which drives the connecting rod to move down along the moving groove. Finally, the hub is driven to move up and down through the rotating rod and the second connecting member, so as to realize the contact / separation of the hub and the extrusion wheel and control the start and stop of the test.

[0008] Preferably, the inner side of the outer frame is fixedly connected with a first partition, a second partition, a third partition, and a fourth partition. The chambers inside the fixed platform are divided into a first chamber, a second chamber, a third chamber, and a fourth chamber by the first partition, the second partition, the third partition, and the fourth partition. The first partition is made of heat-insulating transparent glass, the second partition and the third partition both have one-way ventilation holes, and a temperature sensor is provided inside the third chamber.

[0009] Preferably, a cooling mechanism is provided in the third chamber, a heating mechanism is provided in the fourth chamber, a detection mechanism is provided in the first chamber, and a tooling connection mechanism is provided in the second chamber.

[0010] Preferably, the first connector is slidably connected in the groove, and a connecting rod is fixedly connected to the first connector near the middle of its inner side. A rotating rod is rotatably connected to the connecting rod, and a second connector is fixedly connected to the rotating rod. The second connector is bolted to the wheel hub, and the second connector fixes the wheel hub with bolts. The rotating rod allows the wheel hub to rotate freely with the extrusion wheel, ensuring the flexibility of the wheel hub during rotation and simulating real driving conditions.

[0011] Preferably, a drive motor is installed inside the fixed platform, and a shaft is fixedly connected to the output end of the drive motor. A pressing wheel is fixedly connected to the shaft. The pressing wheel presses against the hub. Rubber is provided on the outer side of the pressing wheel, and friction stripes are provided on the outer side of the rubber. A pressure sensor is provided on the inner side of the rubber. The pressure sensor is used to monitor the contact pressure between the pressing wheel and the hub in real time, ensuring that the pressure is stable within the test threshold, avoiding slippage due to excessive looseness or damage to the hub due to excessive tightness, and ensuring test safety and data accuracy.

[0012] The drive motor drives the extrusion wheel to rotate via the shaft. The rubber and friction stripes on the outer side of the extrusion wheel enhance the friction with the wheel hub. The friction drives the wheel hub to rotate synchronously, simulating the dynamic rotation state of the wheel hub when the vehicle is in motion.

[0013] Preferably, the detection mechanism includes an electric guide rail, which is fixedly connected to a fixed platform. A slider is slidably connected to the electric guide rail, and an electric push rod is fixedly connected to the slider. A camera is fixedly connected to the telescopic section of the electric push rod, driving the slider to move left and right, thereby adjusting the position of the camera laterally to capture images of different lateral positions of the wheel hub. The height of the camera is adjusted to capture images of different longitudinal positions of the wheel hub, forming a multi-directional detection perspective in conjunction with the lateral movement.

[0014] The second and third partitions have one-way ventilation holes. It should be clarified that the ventilation holes are used to realize heat exchange between the fourth chamber, the third chamber and the second chamber, so that the wheel hub is in a temperature change environment.

[0015] Beneficial effects

[0016] This utility model provides a testing fixture for automobile wheel hubs. Compared with the prior art, it has the following advantages:

[0017] (1) A testing fixture for automobile wheel hubs, which, through the heating mechanism of the fourth chamber and the cooling mechanism of the third chamber, combined with the one-way ventilation holes of the second and third partitions, can simulate extreme temperature environments from -40℃ to 80℃. It utilizes temperature sensors to monitor and provide feedback in real time, adapting to the performance testing of wheel hubs under different climatic conditions such as high temperature exposure and low temperature freezing. At the same time, the rubber friction stripes on the outer side of the wheel are squeezed to simulate road friction, and the contact pressure is monitored in real time by a pressure sensor. This can reproduce the stress state of the wheel hub under different driving loads, realize the comprehensive testing of temperature and load as dual variables, cover the complex scenarios in actual use, and thus detect the quality of the wheel hub.

[0018] (2) A test fixture for automobile wheel hubs, wherein a first connecting piece is driven by a hydraulic rod to slide along a groove, thereby driving the wheel hub to be precisely pressed down onto the extrusion wheel. With the adaptive adjustment of the angle of the rotating rod, it can be compatible with the rapid installation of wheel hubs of different sizes without the need for manual center calibration. With the second connecting piece connected by bolts, the wheel hub is further secured to prevent loosening during testing.

[0019] (3) A testing fixture for automobile wheel hubs, which drives a camera to move horizontally via an electric guide rail and adjusts the height of the camera via an electric push rod, thereby achieving multi-directional monitoring of the wheel hub side and end face without blind spots, eliminating the need for manual adjustment of the testing position and greatly improving testing efficiency. Attached Figure Description

[0020] Figure 1 This is a side view of the overall device structure of this utility model;

[0021] Figure 2 This is a side view of the outer frame of this utility model;

[0022] Figure 3 This is a side view of the fixed platform structure of this utility model;

[0023] Figure 4 This is a side view of the first partition structure of this utility model;

[0024] Figure 5 This is a side view of part of the structure of the detection mechanism of this utility model;

[0025] Figure 6 This is a side view of the tooling connection mechanism of this utility model;

[0026] Figure 7 This is a side view of a portion of the tooling connection mechanism of this utility model;

[0027] Figure 8 This is the utility model Figure 7Partial side view of A;

[0028] Figure 9 This is the utility model Figure 7 Partial side view of B.

[0029] In the diagram: 1. Fixed platform; 2. Outer frame;

[0030] Testing components: 31. Electrical guide rail; 32. Slider; 33. Electrical actuator; 34. Camera;

[0031] Tooling connection mechanism: 41. Connecting frame; 42. Hydraulic rod; 43. Slide groove; 44. First connecting piece; 45. Hub; 46. Moving groove; 47. Connecting rod; 48. Rotating rod; 49. Second connecting piece;

[0032] 491. Extrusion roller; 492. Shaft;

[0033] 5. Heating mechanism; 6. Cooling mechanism; 7. First partition; 8. Second partition; 9. Third partition; 10. Fourth partition. Detailed Implementation

[0034] 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.

[0035] Example 1:

[0036] Please see Figure 1-5 A testing fixture for automobile wheel hubs includes a fixed platform 1, an outer frame 2 fixedly connected to the fixed platform 1, a testing mechanism and a fixture connection mechanism provided on the fixed platform 1, and the testing mechanism being located at the side end of the fixture connection mechanism.

[0037] The tooling connection mechanism includes a connecting frame 41 and a hub 45. A sliding groove 43 is provided on the upper end of the connecting frame 41, and a moving groove 46 is provided on the connecting frame 41. A hydraulic rod 42 is fixedly connected to the fixed platform 1, and a first connecting piece 44 is fixedly connected to the output end of the hydraulic rod 42.

[0038] The inner side of the outer frame 2 is fixedly connected with a first partition 7, a second partition 8, a third partition 9 and a fourth partition 10. The chambers inside the fixed platform 1 are divided into a first chamber, a second chamber, a third chamber and a fourth chamber by the first partition 7, the second partition 8, the third partition 9 and the fourth partition 10. The first partition 7 is made of heat-insulating transparent glass. The second partition 8 and the third partition 9 both have one-way ventilation holes. A temperature sensor is installed inside the third chamber.

[0039] The third chamber is equipped with a refrigeration mechanism 6, the fourth chamber is equipped with a heating mechanism 5, the detection mechanism is located in the first chamber, and the tooling connection mechanism is located in the second chamber.

[0040] The first connector 44 is slidably connected in the groove 43. A connecting rod 47 is fixedly connected to the first connector 44 near the middle of its inner side. A rotating rod 48 is rotatably connected to the connecting rod 47. A second connector 49 is fixedly connected to the rotating rod 48. The second connector 49 is bolted to the hub 45.

[0041] A drive motor is installed inside the fixed platform 1. A shaft 492 is fixedly connected to the output end of the drive motor. An extrusion wheel 491 is fixedly connected to the shaft 492. The extrusion wheel 491 is pressed against the hub 45. Rubber is provided on the outside of the extrusion wheel 491. Friction stripes are provided on the outside of the rubber. A pressure sensor is provided on the inside of the rubber.

[0042] The testing mechanism includes an electric guide rail 31, which is fixedly connected to a fixed platform 1. A slider 32 is slidably connected to the electric guide rail 31, and an electric push rod 33 is fixedly connected to the slider 32. A camera 34 is fixedly connected to the telescopic section of the electric push rod 33.

[0043] Work process:

[0044] The hydraulic rod 42 retracts, driving the first connecting piece 44 to move vertically downwards along the slide groove 43 of the connecting frame 41. Simultaneously, the connecting rod 47 slides along the moving groove 46. The angle of the rotating rod 48 is adaptively adjusted, causing the hub 45, fixed by the second connecting piece 49, to smoothly press down until it makes tight contact with the extrusion wheel 491. At this time, the pressure sensor inside the extrusion wheel monitors the contact pressure in real time and feeds it back to the control system, ensuring that the pressure remains stable at a preset threshold. This avoids both excessive looseness leading to rotational slippage and excessive tightness causing hub deformation and damage, providing stable contact conditions for subsequent testing.

[0045] High-temperature environment test:

[0046] The heating mechanism 5 of the fourth chamber is activated, and heat is directed into the second chamber where the wheel hub is located through the one-way vent of the second partition 8, creating a high-temperature testing environment. The temperature sensor of the third chamber monitors the temperature of the second chamber in real time through the vent of the third partition 9, and the data is synchronously fed back to the control system to accurately maintain the target temperature and simulate the environment of the wheel hub driving on a hot road surface in summer.

[0047] Dynamic rotation simulation:

[0048] In a high-temperature environment, the drive motor inside the fixed platform is started, which drives the extrusion roller 491 to rotate via shaft 492. The rubber layer and surface friction stripes on the outer side of the extrusion roller enhance the friction with the wheel hub, driving the wheel hub 45 to rotate synchronously for a preset time, thus replicating the dynamic stress process of the wheel hub under high temperature and testing its fatigue resistance.

[0049] Low temperature and thermal shock testing:

[0050] Heating mechanism 5 is shut down, and cooling mechanism 6 in the third chamber is immediately activated. Cold air is rapidly transferred to the second chamber through the vents in the third partition 9, causing the temperature to plummet to -40℃, creating an extreme temperature change shock from high to low temperature. During this process, the hub continues to rotate with the extrusion wheel, testing its material stability and structural strength under drastic temperature changes.

[0051] All test data is transmitted to the terminal system in real time. Combined with the quantitative data from pressure and temperature sensors, a test report is automatically generated to determine whether the wheel hub meets the usage standards. The terminal system is based on existing technology, and the generation of the test report can be achieved using existing technology.

[0052] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A testing fixture for automobile wheel hubs, characterized in that, Includes a fixed platform (1), on which an outer frame (2) is fixedly connected, and on which a detection mechanism and a tooling connection mechanism are provided, the detection mechanism being located at the side end of the tooling connection mechanism; The tooling connection mechanism includes a connecting frame (41) and a hub (45). The upper end of the connecting frame (41) is provided with a sliding groove (43). The connecting frame (41) is provided with a moving groove (46). A hydraulic rod (42) is fixedly connected to the fixed platform (1). The output end of the hydraulic rod (42) is fixedly connected to a first connecting piece (44).

2. The automotive wheel hub testing fixture according to claim 1, characterized in that: The outer frame (2) is fixedly connected to the inner side of the first partition (7), the second partition (8), the third partition (9) and the fourth partition (10). The chambers in the fixed platform (1) are divided into the first chamber, the second chamber, the third chamber and the fourth chamber by the first partition (7), the second partition (8), the third partition (9) and the fourth partition (10). The first partition (7) is made of heat-insulating transparent glass. The second partition (8) and the third partition (9) both have one-way ventilation holes. A temperature sensor is installed inside the third chamber.

3. The automotive wheel hub testing fixture according to claim 2, characterized in that: The third chamber is equipped with a refrigeration mechanism (6), the fourth chamber is equipped with a heating mechanism (5), the detection mechanism is located in the first chamber, and the tooling connection mechanism is located in the second chamber.

4. The automotive wheel hub testing fixture according to claim 1, characterized in that: The first connector (44) is slidably connected in the groove (43). A connecting rod (47) is fixedly connected to the first connector (44) near the middle of the inner side. A rotating rod (48) is rotatably connected to the connecting rod (47). A second connector (49) is fixedly connected to the rotating rod (48). The second connector (49) is bolted to the hub (45).

5. The automotive wheel hub testing fixture according to claim 4, characterized in that: A drive motor is installed inside the fixed platform (1). A shaft (492) is fixedly connected to the output end of the drive motor. An extrusion wheel (491) is fixedly connected to the shaft (492). The extrusion wheel (491) is extruded by the hub (45). Rubber is provided on the outside of the extrusion wheel (491). Friction stripes are provided on the outside of the rubber. A pressure sensor is provided on the inside of the rubber.

6. The automotive wheel hub testing fixture according to claim 5, characterized in that: The detection mechanism includes an electric guide rail (31), which is fixedly connected to a fixed platform (1). A slider (32) is slidably connected to the electric guide rail (31), and an electric push rod (33) is fixedly connected to the slider (32). A camera (34) is fixedly connected to the telescopic section of the electric push rod (33).

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