Frame rigidity test stand

Abstract

The utility model discloses a frame rigidity test platform, including base and setting installation device for frame locking of base, still including loading device and measuring device on the base, loading device is used for exerting load to frame, measuring device is used for measuring the deformation degree of frame under load. Through exerting force by loading electric cylinder, and combining high accuracy force sensor and line displacement sensor to carry out synchronous data acquisition, the accurate measurement and control of loading force and deformation amount are realized, and the objectivity and reliability of test data are effectively avoided human operation error. Through setting adjusting device by gantry, screw rod elevating system, slide rail and electric sliding platform, make loading and measuring unit can be in three -dimensional space flexible, accurate movement and lock. In combination adjustable clamping piece on mounting seat, make this test platform can quickly adapt to different size and model motorcycle frame, realized " one machine multi -use", greatly promoted the utilization rate and test flexibility of equipment.

Description

Technical Field

[0001] This utility model relates to the field of stiffness testing technology, and in particular to a vehicle frame stiffness testing bench. Background Technology

[0002] As the core load-bearing structure of the motorcycle, the rigidity of the frame directly affects the vehicle's handling stability, safety, and fatigue life. Therefore, accurate testing of the frame's rigidity is crucial during the design and production process.

[0003] Currently, there are various methods for testing the stiffness of motorcycle frames. Some traditional testing methods suffer from inaccurate loading force values, poor repeatability, and difficulty in simulating complex loading conditions. Furthermore, some existing test benches have inconvenient adjustments to the loading and measurement points, or insufficient reliability in locking after adjustment. This results in significant time spent on tooling adjustments and calibrations when testing different frame models, leading to inefficiency and the introduction of human error. Chinese patent "CN202122550390.8" discloses a composite test bench for frame bending stiffness fatigue, but the limited degree of bending adjustment makes it difficult to adapt to a wider range of frame types. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a vehicle frame stiffness testing bench.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a frame stiffness test bench includes a base and an installation device disposed on the base for frame locking; the base also includes a loading device and a measuring device. The loading device is used to apply a load to the frame; the measuring device is used to measure the degree of deformation of the frame under load.

[0006] In the above scheme, preferably, the loading device includes two sets of loading electric cylinders, and the bottom of the loading electric cylinder is provided with a mounting bracket for placing the vehicle frame. The loading electric cylinder is connected to the control rods at both ends of the mounting bracket.

[0007] In the above scheme, preferably, the measuring device includes a force sensor and a linear displacement actuator, wherein the force sensor is disposed between the loading electric cylinder and the control rod, and the linear displacement sensor is disposed at the lower end of the control rod.

[0008] In the above scheme, preferably, the base also includes an adjustment device, which is used to adjust the specific positions of the loading device and the measuring device to match the position of the vehicle frame.

[0009] In the above scheme, preferably, the adjusting device includes a gantry frame and a lifting connecting platform that slides on the gantry frame, and the loading device is disposed on the lifting connecting platform.

[0010] In the above scheme, preferably, a lead screw and a drive motor are provided on the crossbeam of the gantry frame, the lead screw is connected to the lifting connecting platform, and the lead screw passes through the crossbeam and is matched and connected to the drive motor.

[0011] In the above scheme, preferably, a slide rail is provided on the base, and the bottom of the gantry frame is connected to the slider of the electric slide table to realize the movement of the gantry frame on the slide rail.

[0012] In the above scheme, preferably, a first cover plate is provided above the slide rail, and a groove is provided on the first cover plate to match the slide rail.

[0013] In the above scheme, preferably, a second cover plate is provided on one side of the first cover plate, and the installation device is provided on the second cover plate.

[0014] In the above-described scheme, preferably, the mounting device includes a mounting base and a clamping member thereon for fixing the vehicle frame, the clamping member being adjustablely mounted on the mounting base.

[0015] The beneficial effects of this invention are as follows: By employing a loading electric cylinder for force application and combining it with high-precision force sensors and linear displacement sensors for synchronous data acquisition, precise measurement and control of loading force and deformation are achieved, effectively avoiding human error and ensuring the objectivity and reliability of test data. The adjustment device, consisting of a gantry frame, a screw lifting mechanism, slide rails, and an electric slide table, allows the loading and measurement unit to move flexibly and precisely in three-dimensional space and lock. Combined with adjustable clamps on the mounting base, this test bench can quickly adapt to motorcycle frames of different sizes and models, achieving "one machine, multiple uses" and greatly improving equipment utilization and testing flexibility. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the present utility model.

[0017] Figure 2 This is a schematic diagram of part of the mounting bracket of this utility model.

[0018] Figure 3 This is a schematic diagram of the mounting base of this utility model.

[0019] Figure 4 This is a diagram of the internal structure of this utility model. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: See below Figures 1-4 It includes a base 1, a mounting device, a loading device 2, a measuring device 3, and an adjustment device. Specifically, the base 1 serves as the basic support structure for the entire test bench, and other devices are installed on top of the base 1.

[0021] The mounting device is mounted on the base 1 and is used for positioning the motorcycle frame and for mounting it on the base 1 to cooperate with other devices. The mounting device mainly includes a mounting base 14 and a clamping member 15. The mounting base 14 is provided with an arc-shaped slide rail, and the clamping member 15 is mounted on the arc-shaped slide rail and is adjustable to meet the fixing requirements of motorcycle frames of different models and sizes. At the same time, the clamping member 15 is used to clamp the head tube of the frame to ensure that the frame is stably fixed on the mounting device.

[0022] The loading device 2 is used to apply simulated loads to a fixed motorcycle frame. In this embodiment, the loading device 2 includes two sets of loading cylinders 201, the bottom of which is connected to a mounting bracket 202 for supporting the frame. A control lever 203 is provided at both ends of the mounting bracket 202, and the control lever 203 is connected to the loading cylinders 201, thereby simulating the load borne by the vehicle during operation through the driving of the loading cylinders 201.

[0023] Specifically, when both loading cylinders 201 are simultaneously applied upwards, the bending stiffness of the frame is measured; when the two loading cylinders 201 are applied one upwards and the other downwards, the bending stiffness of the frame is measured.

[0024] Furthermore, the base 1 also includes a measuring device 3, comprising two force sensors 301 and a linear displacement sensor 302. The force sensors 301 are installed between the loading cylinder 201 and the control rod 203 to directly measure the load force applied to the frame, ensuring precise and controllable loading force. The linear displacement sensor 302 is installed at the lower end of the control rod 203 to measure the deformation displacement of the frame at the stress point. Force and displacement data are collected synchronously to provide accurate data for measurement.

[0025] To accommodate various chassis configurations, the measuring device 3 and loading device 2 are adjustable, specifically mounted on an adjustment mechanism. This adjustment mechanism includes a gantry frame 4 spanning the base 1. A lead screw 7 and a drive motor 8 are mounted on the crossbeam 6 of the gantry frame 4. A lifting connecting platform 5 is connected to the lead screw 7, allowing the lifting connecting platform 5 to vertically rise and fall along the gantry frame 4 when the drive motor 8 is running. The loading device 2 is mounted on this lifting connecting platform 5, thus achieving vertical adjustment capability.

[0026] Furthermore, to provide horizontal adjustment capability, parallel slide rails 9 are provided on the base 1. The bottom of the gantry 4 is connected to the slider of the electric slide table 10, which can drive the entire gantry 4 to move linearly along the slide rails 9, thereby driving the loading device 2 on it to cover different longitudinal positions of the frame to adapt to different types of frames.

[0027] To protect the precision transmission components and improve the appearance, a first cover plate 11 is provided above the slide rail 9 of the base 1. The first cover plate 11 has an elongated groove 12 that matches the direction of the slide rail 9, providing movement space for the connecting components at the bottom of the gantry frame 4. A second cover plate 13 is provided on one side of the first cover plate 11, and the mounting device for fixing the frame is located in the area covered by the second cover plate 13.

[0028] Working Principle: During operation, the motorcycle frame to be tested is first locked onto the mounting base 14 using the clamping device 15. Then, by controlling the adjustment device, the gantry 4 is moved and raised / lowered, causing the end of the loading cylinder 201 and the mounting bracket 202 to be tested to be mounted on the frame. After the loading program is started, the loading cylinder 201 applies a load according to the set program. Simultaneously, the force sensor 301 and the linear displacement sensor 302 work synchronously to collect data from each sensor. Finally, by analyzing this data, the stiffness performance of the motorcycle frame can be accurately evaluated.

[0029] 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 frame stiffness testing bench, characterized in that: It includes a base (1) and a mounting device disposed on the base (1) for frame locking, the base (1) also including a loading device (2) and a measuring device (3); The loading device (2) is used to apply a load to the frame; the measuring device (3) is used to measure the degree of deformation of the frame under load.

2. The vehicle frame stiffness testing bench according to claim 1, characterized in that: The loading device (2) includes two sets of loading electric cylinders (201). The bottom of the loading electric cylinder (201) is provided with a mounting bracket (202) for placing the vehicle frame. The loading electric cylinder (201) is connected to the control rods (203) at both ends of the mounting bracket (202).

3. The vehicle frame stiffness testing bench according to claim 2, characterized in that: The measuring device (3) includes a force sensor (301) and a linear displacement sensor (302). The force sensor (301) is disposed between the loading electric cylinder (201) and the control rod (203), and the linear displacement sensor (302) is disposed at the lower end of the control rod (203).

4. The vehicle frame stiffness testing bench according to claim 1, characterized in that: The base (1) also includes an adjustment device for adjusting the specific positions of the loading device (2) and the measuring device (3) to match the frame position.

5. The frame stiffness testing bench according to claim 4, characterized in that: The adjustment device includes a gantry (4) and a lifting connecting platform (5) that slides on the gantry (4), and the loading device (2) is disposed on the lifting connecting platform (5).

6. The vehicle frame stiffness testing bench according to claim 5, characterized in that: The gantry frame (4) has a lead screw (7) and a drive motor (8) on its crossbeam (6). The lead screw (7) is connected to the lifting connecting platform (5). The lead screw (7) passes through the crossbeam (6) and is matched with the drive motor (8).

7. The frame stiffness testing bench according to claim 5, characterized in that: The base (1) is provided with a slide rail (9), and the bottom of the gantry (4) is connected to the slider of the electric slide table (10) to enable the gantry (4) to move on the slide rail (9).

8. The vehicle frame stiffness testing bench according to claim 7, characterized in that: A first cover plate (11) is provided above the slide rail (9), and a groove (12) is provided on the first cover plate (11) to match the slide rail (9).

9. The vehicle frame stiffness testing bench according to claim 8, characterized in that: A second cover plate (13) is provided on one side of the first cover plate (11), and the mounting device is provided on the second cover plate (13).

10. The frame stiffness test bench according to claim 1 or 8, characterized in that: The mounting device includes a mounting base (14) and a clamping member (15) thereon for fixing the frame, the clamping member (15) being adjustablely disposed on the mounting base (14).

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