Endurance test clamp

Abstract

The utility model discloses an endurance test fixture, which comprises a base, a top plate, a guide post, a universal rod and an eccentric driving wheel, the center of the top end face of the base is provided with a circular mounting groove for embedding a bushing, one end of the universal rod is provided with a universal ball head, and the other end of the universal rod is provided with a driving head. The universal ball head is used for being embedded into the bottom end of the circular mounting groove, a plurality of guide columns extending vertically are arranged on the outer edge of the bottom end of the top plate, the top plate is slidably connected with the base in the vertical direction through the guide columns, an eccentric driving wheel is rotatably connected to the middle of the top plate, and the axis of the eccentric driving wheel and the axis of the circular mounting groove are collinear. The eccentric driving wheel is used for driving the universal rod to incline; when an endurance test is carried out, the top plate is driven by test equipment to do reciprocating motion along the axial direction of the guide post, so that the inclined chute touches the universal rod driving head to force the universal rod to incline, and non-uniform radial force is applied to the bushing.

Description

Technical Field

[0001] The utility model relates to the technical field of durability testing, in particular to a durability testing fixture. Background Art

[0002] The front control arm is a device used to connect the wheel to the subframe on the car, where one end of the front control arm is hinged to the wheel bearing seat through a ball pin, and the other two ends are connected to the subframe through bushings. Since the bushing is a vulnerable part, durability tests are required during the design process; the fixture currently used in the test can only perform axial force and uniform radial force tests, and when the bushing is subjected to uneven radial force, the existing durability test fixture cannot reproduce the situation. Therefore, a durability test fixture is designed to solve the above problem. Utility Model Content

[0003] In view of the shortcomings of the existing durability test technology, the purpose of the utility model is to provide a durability test fixture, which has the advantages of simulating uneven radial force and controllable radial force adjustment.

[0004] To achieve the above-mentioned purpose, a technical solution adopted by the utility model is: a durability test fixture, including a base, a top plate, a guide column, a universal rod and an eccentric driving wheel, the center of the top end surface of the base has a circular mounting groove for embedding a bushing, one end of the universal rod has a universal ball head, the other end of the universal rod has a driving head, the universal ball head is used to embed the bottom end of the circular mounting groove, the outer edge of the bottom end of the top plate has a plurality of vertically extending guide columns, the top plate is vertically slidably connected to the base through the guide columns, the middle part of the top plate is rotatably connected to an eccentric driving wheel, the axis of the eccentric driving wheel is colinear with the axis of the circular mounting groove, and the eccentric driving wheel is used to drive the universal rod to tilt;

[0005] Preferably, the aperture of the circular mounting slot is the same as the outer diameter of the outer tube of the tested bushing;

[0006] Preferably, the outer diameter of the universal rod is the same as the inner diameter of the inner tube of the tested bushing;

[0007] Preferably, the center of the eccentric driving wheel has an inclined sliding groove, and the inclined sliding groove is used to touch the universal rod driving head;

[0008] Further preferably, the inclined slide groove has an inclination angle a along the axis of the circular installation groove, wherein 45°>a>15°;

[0009] Preferably, the outer edge of the guide column also has a scale mark for debugging and observation;

[0010] The beneficial effects of the utility model are: 1. When conducting a durability test, the test equipment drives the top plate to reciprocate along the axial direction of the guide column, so that the inclined slide groove touches the universal rod driving head to force the universal rod to tilt, thereby applying uneven radial force to the bushing; 2. During the debugging process, by observing the scale markings on the outer edge of the guide column, the top plate can be adjusted to the lowest position close to the base, and the inclined slide groove drives the universal rod to change the inclination angle accordingly, so as to achieve the purpose of controllable radial force adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a cross-sectional structural view of the utility model;

[0012] Figure 2 This is a cross-sectional structural view of the utility model in the test state;

[0013] Figure 3 This is a three-dimensional structural view of the eccentric drive wheel of the utility model;

[0014] Figure 4 This is a three-dimensional cross-sectional structural view of the eccentric drive wheel of the utility model. DETAILED DESCRIPTION

[0015] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0016] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0017] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "provided with", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] See also Figures 1 to 4 , the utility model embodiment includes:

[0019] A durability test fixture, comprising a base 1, a top plate 2, a guide column 3, a universal rod 4 and an eccentric driving wheel 5, wherein the center of the top end surface of the base 1 has a circular mounting groove 11 for embedding a bushing, one end of the universal rod 4 has a universal ball head 41, and the other end of the universal rod 4 has a driving head 42, the universal ball head 41 is used to embed the bottom end of the circular mounting groove 11, the outer edge of the bottom end of the top plate 2 has a plurality of vertically extending guide columns 3, the top plate 2 is vertically slidably connected to the base 1 through the guide columns 3, the middle part of the top plate 2 is rotatably connected to the eccentric driving wheel 5, the axis of the eccentric driving wheel 5 is colinear with the axis of the circular mounting groove 11, and the eccentric driving wheel 5 is used to drive the universal rod 4 to tilt;

[0020] The aperture of the circular installation groove 11 is the same as the outer diameter of the outer tube of the tested bushing;

[0021] The outer diameter of the universal rod 4 is the same as the inner diameter of the inner tube of the tested bushing;

[0022] The center of the eccentric driving wheel 5 has an inclined sliding groove 51, and the inclined sliding groove 51 is used to touch the driving head 42 of the universal rod 4;

[0023] The inclined slide groove 51 is inclined at an angle a along the axis of the circular mounting groove 11, wherein 45°>a>15°;

[0024] The outer edge of the guide column 3 also has a scale mark for debugging and observation;

[0025] Through the above settings, in the actual working process, its specific working principle is as follows:

[0026] First, the fixture base 1 and the top plate 2 are fixed in the test equipment, and the test equipment is used to drive the top plate 2 to reciprocate along the axial direction of the guide column 3;

[0027] During the debugging process, by observing the scale mark on the outer edge of the guide column 3, the top plate 2 can be adjusted to the lowest position close to the base 1, and the inclined slide 51 drives the universal rod 4 to change the inclination angle, so as to achieve the purpose of radial force adjustment and controllable;

[0028] By rotating the eccentric driving wheel 5, the tilting direction of the tilting slot 51 is changed, thereby synchronously changing the direction in which the uneven radial force applied by the universal rod 4 to the bushing;

[0029] When conducting the durability test, firstly, the universal rod 4 is passed through the inner tube of the bushing, and then the bushing is downwardly embedded in the circular installation groove 11 for positioning; after the bushing is in place, the test equipment drives the top plate 2 to reciprocate along the axial direction of the guide column 3, and when the top plate 2 moves downward toward the base 1, the inclined slide groove 51 in the eccentric driving wheel 5 touches the driving head 42 of the universal rod 4, thereby forcing the universal rod 4 to tilt, so as to apply uneven radial force to the bushing; when the top plate 2 moves upward away from the base 1, the bushing forces the universal rod 4 to return to the center position, thereby completing a single durability test of the bushing;

[0030] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A durability test fixture, characterized in that: It includes a base, a top plate, a guide column, a universal rod and an eccentric driving wheel. The center of the top end surface of the base has a circular mounting groove for embedding a bushing. One end of the universal rod has a universal ball head, and the other end of the universal rod has a driving head. The universal ball head is used to embed the bottom end of the circular mounting groove. The outer edge of the bottom end of the top plate has a plurality of vertically extending guide columns. The top plate is vertically slidably connected to the base through the guide columns. The middle part of the top plate is rotatably connected to an eccentric driving wheel. The axis of the eccentric driving wheel is colinear with the axis of the circular mounting groove. The eccentric driving wheel is used to drive the universal rod to tilt.

2. A durability test fixture according to claim 1, characterized in that: The aperture of the circular installation slot is the same as the outer diameter of the outer tube of the tested bushing.

3. A durability test fixture according to claim 1, characterized in that: The outer diameter of the universal rod is the same as the inner diameter of the inner tube of the tested bushing.

4. A durability test fixture according to claim 1, characterized in that: The center of the eccentric driving wheel is provided with an inclined sliding groove, and the inclined sliding groove is used to touch the universal rod driving head.

5. A durability test fixture according to claim 4, characterized in that: The inclined sliding groove has an inclination angle a along the axis of the circular installation groove, wherein 45°>a>15°.

6. A durability test fixture according to claim 1, characterized in that: The outer edge of the guide column also has scale markings for debugging and observation.

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