Frame fatigue test device

Abstract

The utility model discloses a frame fatigue test device, frame fatigue test device includes first fixed unit and second fixed unit, and first fixed unit and second fixed unit are used for frame locking, first fixed unit includes rotatable support cylinder, and a plurality of clamping pieces are arranged on the support cylinder and slide, to lock the head tube of frame inclination arrangement, still include the first hydraulic cylinder and second hydraulic cylinder for the fatigue load, first hydraulic cylinder cooperation support cylinder and set up on first fixed unit. Rotatable support cylinder and sliding clamping piece in first fixed unit, can steady locking inclined head tube, ensure fixed reliable, accommodate different size's head tube simultaneously, through the cooperation of first hydraulic cylinder and second hydraulic cylinder, can realize the application of multidirectional fatigue load, including horizontal direction's tensile load and pressure load and vertical direction's weight load, comprehensive simulation actual working condition, improve the accuracy of test.

Description

Technical Field

[0001] This utility model relates to the field of fatigue testing technology, and in particular to a chassis fatigue testing device. Background Technology

[0002] In the field of vehicle manufacturing, the fatigue performance of the chassis is a key factor in ensuring vehicle safety and service life. Therefore, chassis fatigue testing equipment is used to simulate loads under actual operating conditions to evaluate chassis durability. Existing chassis fatigue testing equipment typically has a fixed structure, making it inflexible to adapt to chassis of different sizes and types. This is especially true when testing three-wheeled vehicle chassis, which have an inclined head tube, complex rear structure, and often use a single fixing and loading method, making it difficult to comprehensively simulate the multi-directional fatigue loads encountered in actual use. For example, some existing devices can only apply loads in one direction, unable to simultaneously or alternately apply horizontal and vertical loads, resulting in incomplete test results. Furthermore, the position adjustment of the fixing unit is inconvenient, making it difficult to adapt to chassis with different wheelbases and widths, affecting testing efficiency and accuracy. Therefore, there is an urgent need for a chassis fatigue testing device that can be flexibly fixed and subjected to multi-directional loading. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing a chassis fatigue testing device.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: The frame fatigue testing device includes a first fixing unit and a second fixing unit, which are used for locking the frame; the first fixing unit includes a rotatable support cylinder, on which a plurality of clamping members are slidably disposed to lock the tilted head tube of the frame; it also includes a first hydraulic cylinder and a second hydraulic cylinder for applying fatigue load, the first hydraulic cylinder cooperating with the support cylinder and disposed on the first fixing unit.

[0005] In the above solution, preferably, it further includes a first base and a second base, wherein the first fixing unit can slide on the first base and the second fixing unit can slide on the second base.

[0006] In the above scheme, preferably, an adjustable gantry frame is provided on the second base, and the second hydraulic cylinder is installed on the crossbeam of the gantry frame.

[0007] In the above scheme, preferably, the first fixing unit includes a first mounting base, a first sliding rod, and a first slider. The first mounting base is slidably disposed on a first slide rail of the first base. The first sliding rod is fixed inside the first mounting base. The first slider slides on the first sliding rod, and the support cylinder is rotatably connected to the first slider.

[0008] In the above scheme, preferably, the output end of the first hydraulic cylinder is disposed corresponding to the middle part of the first slider, and the cylinder body of the first hydraulic cylinder is fixed to the outer periphery of the first mounting base.

[0009] In the above scheme, preferably, the second fixing unit is located at both ends of the rear part of the frame, wherein the second fixing unit includes a replaceable connector on the second mounting base, and the connector is used to connect different parts of the frame.

[0010] In the above scheme, preferably, the second mounting base is slidably mounted on the second slide rail of the second base via a locking screw.

[0011] In the above scheme, preferably, the second hydraulic cylinder is installed in a mounting box on the gantry frame, and the mounting box is provided with a second slide rod and a second slider that slides thereon, the second slider being connected to the loading member.

[0012] In the above scheme, preferably, the loading component includes a loading roller, which is connected to the second slider via a support rod.

[0013] In the above scheme, preferably, the loading component further includes a loading connecting rod, which is located on both sides of the loading roller and is used to connect with the rear wheel axle.

[0014] The beneficial effects of this utility model are as follows: the sliding arrangement of the first and second fixing units allows for flexible adjustment of the position to adapt to frames with different wheelbases and widths, improving the versatility of the device and testing efficiency; the rotatable support cylinder and sliding clamp in the first fixing unit can stably lock the tilted head tube, ensuring reliable fixation, while also adapting to head tubes of different sizes; the cooperation of the first and second hydraulic cylinders enables the application of multi-directional fatigue loads, including horizontal tensile and compressive loads and vertical loads, comprehensively simulating actual working conditions and improving the accuracy of testing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the loading of the rear wheel axle of this utility model.

[0016] Figure 2 This is a schematic diagram of the horizontal loading of this utility model.

[0017] Figure 3 This is a schematic diagram of the centroid loading of this utility model.

[0018] Figure 4 This is a schematic diagram of the second fixing unit of this utility model.

[0019] Figure 5 This is a schematic diagram of the second fixing unit of this utility model.

[0020] Figure 6 This is a schematic diagram of the first fixing unit of this utility model. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: See below Figures 1-6 This invention relates to a frame fatigue testing device, which is particularly suitable for conducting fatigue performance tests on tricycle frames under simulated actual working conditions. Specifically, the frame fatigue testing device mainly includes a first fixing unit 1, a second fixing unit 2, a first base 8, a second base 9, a gantry frame 10, a first hydraulic cylinder 6, and a second hydraulic cylinder 7.

[0022] The first base 8 and the second base 9 are arranged adjacent to each other and are fixed or disassembled by bolts to facilitate transportation. Furthermore, the first fixing unit 1 and the second fixing unit 2 are both used to fix the vehicle frame on the first base 8 and the second base 9.

[0023] The first fixing unit 1 includes a first mounting base 11, the bottom of which slides on a first slide rail on the first base 8, so that the entire first fixing unit 1 can move along the first slide rail, making it easy to adjust the distance to adapt to different wheelbases of the vehicle frame.

[0024] The first fixing unit 1 also includes a rotatable support cylinder 3, a first slide rod 12 and a first slider 13 disposed in the first mounting base 11. The first slider 13 is sleeved on the first slide rod 12 by a linear bearing to achieve stable sliding. The support cylinder 3 is rotatably connected to the middle of the first slider 13. Several clamping members 4 are slidably and lockably disposed on the support cylinder 3. The clamping members 4 are used to fix the head tube 5 of the frame of different sizes.

[0025] The first hydraulic cylinder 6 is a component that applies horizontal fatigue loads. Its cylinder body is fixed to the outer periphery of the first mounting base 11. The extension direction of the output end of the first hydraulic cylinder 6 is horizontally aligned with the center of the first slider 13.

[0026] The second fixing unit 2 is mounted on the second base 9. Typically, the second fixing unit 2 is symmetrically arranged on the left and right sides of the rear of the frame and is used to fix the rear end of the frame. Each second fixing unit 2 includes a second mounting base 14, on which a replaceable connector 15 is provided. Different frame parts need to be connected under different fatigue loads, therefore the connector 15 can be replaced as needed. In this embodiment, the connector 15 includes a ring-shaped part that can be sleeved with the rear wheel axle of the frame or a plate body connected to the frame and equipped with a screw. The bottom of the second mounting base 14 is slidably connected to the second slide rail of the second base 9 via a screw to realize its sliding mechanism. It cooperates with the second slide rail on the second base 9 to achieve sliding, so as to adapt to the frame of different widths.

[0027] Furthermore, an adjustable gantry 10 is straddled on the second base 9. The position of the gantry 10 is adjustable on the second base 9 to accommodate frames of different sizes. The second hydraulic cylinder 7 is mounted on the crossbeam of this gantry 10.

[0028] Specifically, a mounting box 16 is provided on the crossbeam of the gantry frame 10. The cylinder body of the second hydraulic cylinder 7 is fixed to the outer top of the mounting box 16. A second slide rod 17 is also vertically arranged inside the mounting box 16, and a second slider 18 is sleeved on the second slide rod 17 through a linear bearing and can slide stably up and down along it. The output shaft of the second hydraulic cylinder 7 is arranged corresponding to the second slider 18, driving it to rise and fall.

[0029] A loading element is connected below the second slider 18. The loading element provides at least two usage modes, and includes a loading roller 20 connected to the bottom of the second slider 18 via a support rod. Furthermore, a pair of loading connecting rods 19 are symmetrically added on both sides of the loading roller 20. These loading connecting rods are used to connect to the rear wheel axle of the vehicle frame.

[0030] Working principle: Horizontal loading is applied to the frame: After the rear side of the frame is connected to the rear wheel axle of the frame through the second fixing unit 2, and the rear wheel axle is constrained, only the rotational degree of freedom is released. At the same time, after the first fixing unit 1 is connected to the head tube 5, the first hydraulic cylinder 6 is controlled. During the reciprocating motion, its output end directly pushes or pulls the first slider 13, causing it to slide repeatedly on the first slide rod 12. Thus, a horizontal, alternating tensile and compressive load is applied to the frame through the support cylinder 3 and the head tube 5 to achieve horizontal loading. The pressure value is recorded during the reciprocating process. When the pressure value deviates, it is automatically fed back to the hydraulic system. The hydraulic system adjusts the pressure value through the valve body to ensure the accuracy of the test.

[0031] Loading the frame's center of gravity downwards: After being fixed to the rear wheel by the second fixing unit 2, the first fixing unit 1 fixes the front end of the frame, pressing the loading roller 20 against the frame near the center, and the second hydraulic cylinder 7 continuously loads downwards to simulate the alternating vertical load when the vehicle is fully loaded.

[0032] Loading the rear axle of the frame: After the second fixing unit 2 is fixed to the frame via the plate component and then to the second base 9, the two loading connecting rods 19 are respectively connected to the rear axles on the left and right sides of the frame. The second hydraulic cylinder 7 loads upward, and the two connecting rods directly apply a vertical push-pull load to the rear axle portion of the frame.

[0033] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A chassis fatigue testing device, characterized in that: It includes a first fixing unit (1) and a second fixing unit (2), which are used for locking the frame; the first fixing unit (1) includes a rotatable support cylinder (3), on which a plurality of clamping members (4) are slidably disposed to lock the tilted head tube (5) of the frame; it also includes a first hydraulic cylinder (6) and a second hydraulic cylinder (7) for applying fatigue load, the first hydraulic cylinder (6) cooperating with the support cylinder (3) and disposed on the first fixing unit (1).

2. The chassis fatigue testing device according to claim 1, characterized in that: It also includes a first base (8) and a second base (9), wherein the first fixing unit (1) can slide on the first base (8) and the second fixing unit (2) can slide on the second base (9).

3. The chassis fatigue testing device according to claim 2, characterized in that: An adjustable gantry (10) is provided on the second base (9), and the second hydraulic cylinder (7) is installed on the crossbeam of the gantry (10).

4. The chassis fatigue testing apparatus according to claim 1, characterized in that: The first fixing unit (1) includes a first mounting base (11), a first slide rod (12) and a first slider (13). The first mounting base (11) is slidably disposed on the first slide rail of the first base (8). The first slide rod (12) is fixed inside the first mounting base (11). The first slider (13) slides on the first slide rod (12) and the support cylinder (3) is rotatably connected to the first slider (13).

5. The chassis fatigue testing apparatus according to claim 4, characterized in that: The output end of the first hydraulic cylinder (6) is located in the middle of the first slider (13), and the cylinder body of the first hydraulic cylinder (6) is fixed on the outer periphery of the first mounting base (11).

6. The chassis fatigue testing apparatus according to claim 2, characterized in that: The second fixing unit (2) is located at both ends of the rear of the frame. The second fixing unit (2) includes a second mounting base (14) with replaceable connectors (15) thereon. The connectors (15) are used to connect different parts of the frame.

7. The chassis fatigue testing apparatus according to claim 6, characterized in that: The second mounting base (14) is slidably mounted on the second slide rail of the second base (9) via a locking screw.

8. The chassis fatigue testing apparatus according to claim 3, characterized in that: The second hydraulic cylinder (7) is installed in the mounting box (16) on the gantry (10). The mounting box (16) is provided with a second slide rod (17) and a second slider (18) that slides thereon. The second slider (18) is connected to the loading member.

9. The chassis fatigue testing apparatus according to claim 8, characterized in that: The loading element includes a loading roller (20), which is connected to the second slider (18) via a support rod.

10. The chassis fatigue testing apparatus according to claim 9, characterized in that: The loading component also includes a loading connecting rod (19), which is located on both sides of the loading roller (20) and is used to connect to the rear wheel axle.

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