A test fixture for a car traction device for guiding the traction force direction

Abstract

The present invention relates to a test fixture for a car traction device that guides the direction of traction force, comprising a T-shaped lower base, a T-shaped upper base connected to the T-shaped lower base by bolts, and two guide plates fixed to the top of the T-shaped upper base and arranged in parallel, wherein the guide plates are provided with a first hole distributed along the same axis, two second holes arranged in the vertical direction, and two third holes arranged in the horizontal direction; the connecting line of the first holes on the two guide plates is horizontal, and is used to measure the traction force of 0° in the horizontal direction; the connecting line of the second holes on the two guide plates and the axis of the first hole are at an angle of 5°, and are used to measure the traction force of ±5° in the vertical direction; the connecting line of the third holes on the two guide plates and the axis of the first hole are at an angle of 25°, and are used to measure the traction force of ±25° in the horizontal direction. The present invention makes the test process standardized and accurate, more in line with the test requirements of the national standard, and improves the accuracy and effectiveness of the test results.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts, in particular to a test tool for a car traction device which guides the traction direction. Background Art

[0002] As we all know, the traction device of a light vehicle, that is, the front subframe of the vehicle, is an important safety component for rescue vehicles to tow and transfer the vehicle when the vehicle cannot move autonomously or fails. The national standard "GB3057-2015 Light Vehicle Traction Device" stipulates the technical requirements and test methods for vehicle traction devices.

[0003] The standard has made relatively strict regulations on the direction of traction. When implementing the traction of ±5° in the vertical direction and ±25° in the horizontal direction, the existing test scheme generally uses trigonometric functions to calculate the moving distance of the test actuator or uses an angle ruler to measure the positioning. There are defects such as cumbersome test debugging process and large errors in calculation and measurement during actual experiments. In order to ensure that the traction is in the vertical upward direction of 5°, it is necessary to first test the length of the actuator from the force point of the traction device, and then adjust the base height of the actuator according to the trigonometric function calculation to make the test state meet the national standard requirements. This method has problems such as measurement error and calculation error. Summary of the invention

[0004] In order to avoid and solve the above technical problems, the present invention proposes a test fixture for a car traction device which guides the direction of traction force.

[0005] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0006] A test fixture for a car traction device for guiding the traction direction, comprising a T-shaped lower base, a T-shaped upper base connected to the T-shaped lower base by bolts, and two guide plates fixed to the top of the T-shaped upper base and arranged in parallel, wherein the guide plates are each provided with a first hole distributed along the same axis, two second holes arranged in the vertical direction, and two third holes arranged in the horizontal direction;

[0007] The line connecting the first holes on the two guide plates is horizontal, which is used to measure the traction force at 0° in the horizontal direction;

[0008] The angle between the connecting line of the second holes on the two guide plates and the axis of the first hole is 5°, which is used to measure the traction force in the vertical direction ±5°;

[0009] The angle between the connecting line of the third holes on the two guide plates and the axis of the first hole is 25°, which is used to measure the traction force in the horizontal direction of ±25°.

[0010] Furthermore, the second holes of the two guide plates are distributed along the same axis.

[0011] Furthermore, the third holes of the two guide plates are distributed along the same axis.

[0012] Furthermore, the T-shaped lower base is provided with symmetrically arranged waist-shaped holes, and the T-shaped upper base is provided with round holes matching with the waist-shaped holes, so that the height of the T-shaped upper base can be adjusted by bolt connection.

[0013] The beneficial effects of the present invention are:

[0014] 1. Through this test fixture, the test process is standardized and accurate, more in line with the national standard test requirements, and the accuracy and effectiveness of the test results are improved;

[0015] 2. The use of this test fixture greatly simplifies the installation and debugging process of the test and improves efficiency;

[0016] 3. The upper base and lower base of the test fixture are connected by waist-shaped holes and are height-adjustable, making the fixture suitable for traction tests of multiple products, expanding its scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ;

[0019] Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ;

[0020] Figure 3 Partial cross-section of the present invention Figure 1 ;

[0021] Figure 4 Partial cross-section of the present invention Figure 2 ;

[0022] Figure 5 It is a schematic diagram of the present invention when used;

[0023] Figure 6 Schematic diagram of the angle loading test for a car Figure 1 ;

[0024] Figure 7 Schematic diagram of the angle loading test for a car Figure 2 . DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below.

[0026] like Figures 1 to 7As shown, a test fixture for a car traction device for guiding the traction direction comprises a T-shaped lower base 1, a T-shaped upper base 2 connected to the T-shaped lower base 1 by bolts, and two guide plates 3 fixed to the top of the T-shaped upper base 2 and arranged in parallel, wherein the guide plates 3 are each provided with a first hole 5 distributed along the same axis, two second holes 6 arranged in the vertical direction, and two third holes 7 arranged in the horizontal direction;

[0027] The connecting line of the first holes 5 on the two guide plates 3 is horizontal, and is used to measure the traction force at 0° in the horizontal direction;

[0028] The angle between the connecting line of the second holes 6 on the two guide plates 3 and the axis of the first hole 5 is 5°, which is used to measure the traction force in the vertical direction ±5°;

[0029] The angle between the connecting line of the third holes 7 on the two guide plates 3 and the axis of the first hole 5 is 25°, which is used to measure the traction force in the horizontal direction of ±25°.

[0030] The second holes 6 of the two guide plates 3 are distributed along the same axis, so as to facilitate the insertion of the steel wire rope during the traction force test.

[0031] The third holes 7 of the two guide plates 3 are distributed along the same axis, so as to facilitate the insertion of the steel wire rope during the traction force test.

[0032] The T-shaped lower base 1 is provided with symmetrically arranged waist-shaped holes 1a, and the T-shaped upper base 2 is provided with round holes 2a that match the waist-shaped holes 1a, so that the height of the T-shaped upper base 2 can be adjusted by bolt connection.

[0033] When in use, first fix the traction device 9 of the car on the test bench, and then adjust the relative positions of the T-shaped lower base 1 and the T-shaped upper base 2 by bolt connection through the cooperation of the waist-shaped hole 1a and the round hole 2a, that is, change the height of the T-shaped upper base 2, so that the first holes 5 on the two guide plates 3 are kept horizontal with the force point of the traction device, so as to conveniently realize the horizontal direction 0° traction test;

[0034] After the horizontal 0° position is positioned, the entire tooling assembly is fixed on the test bench, and the steel wire rope 8 is passed through the second hole 6 and the third hole 7 respectively, and one end is connected to the test actuator and the other end is connected to the traction device 9. The base of the test actuator is adjusted. When the test actuator and the steel wire rope 8 are in a straight line, it is the required traction force test direction. After starting the test actuator, the vertical ±5° traction force and the horizontal ±25° traction force are tested respectively.

[0035] In summary, this invention utilizes the principle of four-point positioning, which can accurately achieve the traction direction positioning of 0° in the horizontal direction, ±5° in the vertical direction, and ±25° in the horizontal direction, effectively avoiding measurement errors and calculation errors, and ensuring the accuracy of the traction device test and the validity of the test results.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A test fixture for a car traction device for guiding the traction direction, comprising a T-shaped lower base (1), a T-shaped upper base (2) connected to the T-shaped lower base (1) by bolts, and two guide plates (3) fixed to the top of the T-shaped upper base (2) and arranged in parallel, characterized in that: The guide plates (3) are each provided with a first hole (5) distributed along the same axis, two second holes (6) arranged in a vertical direction, and two third holes (7) arranged in a horizontal direction; The connecting line of the first holes (5) on the two guide plates (3) is horizontal and is used to measure the traction force at 0° in the horizontal direction; The angle between the connecting line of the second holes (6) on the two guide plates (3) and the axis of the first hole (5) is 5°, which is used to measure the traction force in the vertical direction of ±5°; The angle between the connecting line of the third holes (7) on the two guide plates (3) and the axis of the first hole (5) is 25°, which is used to measure the traction force of ±25° in the horizontal direction; the second holes (6) of the two guide plates (3) are distributed along the same axis; the third holes (7) of the two guide plates (3) are distributed along the same axis; the T-shaped lower base (1) is provided with symmetrically arranged waist-shaped holes (1a), and the T-shaped upper base (2) is provided with a circular hole (2a) matched with the waist-shaped hole (1a), so that the height of the T-shaped upper base (2) can be adjusted by bolt connection.

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