High-strength adjustable auxiliary frame fatigue endurance strength test device

Abstract

The utility model provides a high-strength adjustable auxiliary frame fatigue endurance strength test device which comprises a fixed base installed on a test bench, a vehicle body fixing support is arranged at the top of the fixed base, the vehicle body fixing support is fixedly connected with a vehicle body through threads, and a locking device is arranged between the vehicle body fixing support and the fixed base. The fixing base comprises a vertical hollow pipe, a screw hole is formed in the center of the top face of the hollow pipe, the vehicle body fixing support is a three-section stepped shaft, a threaded section is arranged on the outer ring of a third section shaft on the lower portion of the three-section stepped shaft, and the threaded section is screwed with the screw hole. According to the utility model, the lower end of the vehicle body fixing bracket adopts a threaded section (external thread form) structure, the adjustable distance is 300mm, and the height adjustment requirement of different auxiliary frame bench tests can be met; the position of the fixed base on the test bed is adjusted according to needs, the technical defect that the test bed cannot be matched and used universally due to different vehicle body mounting points and other hard points of different auxiliary frames is overcome, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fatigue durability test of automobile aluminum alloy subframes, etc., and specifically relates to a high-strength adjustable subframe fatigue durability strength test device, which is applicable to fatigue durability, strength and other test devices of various aluminum alloy subframes such as full-frame butterfly type and ingot beam. Background Art

[0002] In recent years, the demand for automobile lightweight has been increasing. Due to its high strength, light weight and other advantages, aluminum alloy has been widely used in various system structural parts of automobiles. Especially in the field of chassis subframes, the application of aluminum alloy is increasing. In the collision of the whole vehicle system, due to the inertial force, the front subframe generally receives a large impact force. Especially at the connection point between the subframe and the rear end of the vehicle body, a large impact force will be received, and situations such as yielding and fracture are likely to occur. Therefore, as a chassis structural part, the subframe needs to have characteristics such as anti-fatigue durability. Simply relying on CAE analysis does not have the risk of detecting cracks and other problems during the process; before installation on the vehicle, it needs to be tested on the test bench to simulate the actual road conditions of the real vehicle. Therefore, the test bench solves the actual problems before the real vehicle is installed, but there are the following technical defects: due to different body mounting points and other hard points of different subframes, the test bench cannot be matched and generalized, and different subframes need to be designed with separate test bench devices, resulting in high production costs.

[0003] Therefore, how to design a high-strength adjustable subframe fatigue durability strength test device that adapts to different subframes has become an urgent problem to be solved. Summary of the Utility Model

[0004] Aiming at the problems existing in the prior art, the utility model provides a high-strength adjustable subframe fatigue durability strength test device to solve at least one of the above technical problems.

[0005] The technical solution of the utility model is: a high-strength adjustable subframe fatigue durability strength test device, including a fixed base installed on a test bench. A vehicle body fixing bracket is arranged on the top of the fixed base. The vehicle body fixing bracket is fixedly connected to the vehicle body through threads. A locking device is arranged between the vehicle body fixing bracket and the fixed base, and the locking device can lock the vehicle body fixing bracket. The fixed base includes a vertically arranged hollow tube, and a screw hole is arranged at the center of the top surface of the hollow tube. The vehicle body fixing bracket is a three-stage stepped shaft, and a threaded section is arranged on the outer circle of the third stage shaft at the lower part of the three-stage stepped shaft, and the threaded section is screwed with the screw hole.

[0006] The lower end of the vehicle body fixing bracket of the present utility model adopts a threaded section (external thread form) structure, with an adjustable distance of 300 mm, which can meet the height adjustment requirements of different subframe bench tests; the position of the fixed base on the test bench can be adjusted as needed, solving the technical defect that different subframes cannot be matched and used commonly due to different vehicle body mounting points and other hard points. Different subframes do not need to be separately designed with bench test devices, reducing production costs. Brief Description of the Drawings

[0007] Figure 1 is the front view of the present utility model.

[0008] Figure 2 is the top view of the present utility model.

[0009] Figure 3 is Figure 2 the sectional view taken along line A-A of

[0010] In the figures: 1. Fixed base; 2. Locking device; 3. Vehicle body fixing bracket. Detailed Embodiment

[0011] The present utility model will be further described below with reference to the accompanying drawings.

[0012] Referring to Figures 1-3 , the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present utility model can be implemented. Therefore, they do not have technical substantive significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope under which the present utility model can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope under which the present utility model can be implemented.

[0013] Embodiment 1. A high-strength adjustable subframe fatigue durability strength test device, referring to Figure 1 , Figure 3, including a fixed base 1 installed on a test bench. A vehicle body fixing bracket 3 is provided on the top of the fixed base 1. The vehicle body fixing bracket 3 is fixedly connected to the vehicle body by threads. A locking device 2 is provided between the vehicle body fixing bracket 3 and the fixed base 1, and the locking device 2 can lock the vehicle body fixing bracket 3. In the present utility model, the vehicle body fixing bracket is fixedly connected to the vehicle body by threads, and the adjustable distance is 300 mm, which can meet the height adjustment requirements of different subframe bench tests; the position of the fixed base on the test bench can be adjusted as needed, solving the technical defect that different subframes cannot be matched and used commonly due to different vehicle body mounting points and other hard points. Different subframes do not need to be separately designed with bench test devices, reducing production costs.

[0014] Embodiment 2: On the basis of Embodiment 1, the fixed base 1 includes a vertically arranged hollow tube, and a screw hole is provided at the center of the top surface of the hollow tube. The vehicle body fixing bracket 3 is a three-stage stepped shaft, and a threaded section is provided on the outer circle of the third stage shaft at the lower part of the three-stage stepped shaft. The threaded section is screwed with the screw hole. The lower end of the vehicle body fixing bracket of the present utility model adopts a threaded section (external thread form) structure, and the adjustable distance is 300 mm, which can meet the height adjustment requirements of different subframe bench tests; the internal threaded form of the fixed base is tightly matched with the threaded section of the vehicle body fixing bracket, avoiding the bumping and loss of the threads.

[0015] Embodiment 3: On the basis of Embodiment 2, referring to Figure 2 , the locking device 2 includes a screw sleeve, and symmetrically arranged "one-shaped" handles are provided on the outer circle of the screw sleeve. The present utility model adopts a screw sleeve and symmetrically arranged "one-shaped" handles on the outer circle of the screw sleeve to form a locking device, which can ensure the stability of the bench test process and the stability of the test.

[0016] Embodiment 4: On the basis of Embodiment 3, the screw sleeve can be screwed with the threaded section of the vehicle body fixing bracket 3. The present utility model adopts that the screw sleeve can be screwed with the threaded section of the vehicle body fixing bracket, and the locking device can lock the vehicle body fixing bracket, which can ensure the stability of the bench test process and the stability of the test.

[0017] Embodiment 5: On the basis of Embodiment 3, the middle part of the three-stage stepped shaft is the large end, the upper part of the three-stage stepped shaft is the first stage shaft, and a threaded counterbore is provided at the center of the top surface of the first stage shaft. The present utility model adopts a threaded counterbore provided on the top surface of the first stage shaft, and the threaded counterbore is used for connecting with the vehicle body.

[0018] Embodiment 6: On the basis of Embodiment 1, the fixed base 1 further includes a bottom plate. The bottom plate is located at the bottom surface of the hollow tube, and several reinforcing ribs are provided between the top surface of the bottom plate and the outer circle of the hollow tube. The reinforcing ribs are evenly distributed around the outer circle of the hollow tube in a circumferential manner. The present utility model adopts 4 reinforcing ribs evenly distributed around the outer circle of the hollow tube to be connected with the bottom plate, ensuring the strength of the test device.

[0019] The above is only the preferred embodiment of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A high-strength adjustable subframe fatigue endurance strength test device, comprising a fixed base (1) mounted on a test bench, characterized in that: A vehicle body fixing bracket (3) is arranged on the top of the fixing base (1); the vehicle body fixing bracket (3) is fixed to the vehicle body via threads; a locking device (2) is arranged between the vehicle body fixing bracket (3) and the fixing base (1); the locking device (2) can lock the vehicle body fixing bracket (3).

2. A high-strength adjustable subframe fatigue endurance strength testing device according to claim 1, characterized in that: The fixing base (1) comprises a vertical hollow tube, the top center of which is provided with a screw hole, the vehicle body fixing bracket (3) is a three-section stepped shaft, the outer ring of the third section of the lower part of the three-section stepped shaft is provided with a threaded section, and the threaded section is screwed into the screw hole.

3. A high-strength adjustable subframe fatigue endurance strength testing device according to claim 2, characterized in that: The locking device (2) comprises a screw sleeve, and the outer ring of the screw sleeve is provided with symmetrically arranged "straight-shaped" handles.

4. The high-strength adjustable subframe fatigue endurance strength testing device according to claim 3, characterized in that: The threaded sleeve can be screwed together with the threaded section of the vehicle body fixing bracket (3).

5. The high-strength adjustable subframe fatigue endurance strength testing device according to claim 3, characterized in that: The middle part of the three-section stepped shaft is the large end, the upper part of the three-section stepped shaft is the first section shaft, and a threaded countersunk hole is arranged at the center of the top surface of the first section shaft.

6. The high-strength adjustable subframe fatigue endurance strength testing device according to claim 1, characterized in that: The fixed base (1) further comprises a bottom plate, the bottom plate is located on the bottom surface of the hollow tube, a plurality of reinforcing ribs are arranged between the top surface of the bottom plate and the outer ring of the hollow tube, and the plurality of reinforcing ribs are evenly distributed around the circumference of the outer ring of the hollow tube.

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