Test fixture

Abstract

The utility model discloses a test fixture, which comprises a fixture main body, a through cavity used for placing a workpiece is arranged in the fixture main body, two ends of the workpiece are respectively fixed with the fixture main body through a bushing I and a bushing II, the fixture main body comprises an upper plate and a base which are arranged up and down, the through cavity in the upper plate is connected with the bushing I, and the through cavity in the base is connected with the bushing II. The connecting face of the upper plate and the base and the connecting face of the first lining and the second lining are located on the same plane. The structure is simple in structure, is basically consistent with a traditional production process, is economical and practical, is low in processing cost, is controllable in assembly precision, reduces the difficulty of a manufacturing process, and can independently press the first bushing and the second bushing.

Description

Technical Field

[0001] The utility model relates to a test fixture and belongs to the technical field of automobile component test fixtures. Background Art

[0002] In the process of automobile development, as the performance requirements of the whole vehicle are constantly changing, the structure of the bushing is also constantly changing. A new structure of the bushing with both ends turned over is born due to the performance requirements of the whole vehicle. Since the bushing stiffness of this structure is large, the test fixture of the Haver structure has a larger test stiffness error. The existing integrated fixture A Figure 1 As shown, the workpiece is first inserted into the bushing 2 (as shown in FIG. Figure 3 , 4 Then, the workpiece together with the bushing 2 is pressed into the one-piece fixture A, the outer edge of the bushing 2 is limited on the surface of the one-piece fixture A, and then the bushing 1 is pressed into the other end of the workpiece (as shown in FIG. Figure 5 , 6 As shown in the figure, the outer edge of the bushing 1 is limited to the other side surface of the integrated fixture A, so that the workpiece is fixed. In this structure, it is easy to press the bushing in, but it is troublesome to press the bushing out. Considering the convenience of pressing in / out the bushing, it is necessary to design a new test fixture structure to facilitate the pressing in and out of the bushing, and it is easy to operate, simple and easy to operate, and has high assembly accuracy. Summary of the invention

[0003] The technical problem to be solved by the utility model is that it is inconvenient to press in / press out the bushing of the traditional test fixture.

[0004] In order to solve the above problems, the utility model provides the following technical solutions:

[0005] A test fixture comprises a fixture body, a through cavity for placing a workpiece is provided in the fixture body, two ends of the workpiece are respectively fixed to the fixture body by bushing one and bushing two, the fixture body comprises an upper plate and a base arranged up and down, the through cavity in the upper plate and bushing one, the through cavity in the base and bushing two, and the connecting surfaces of the upper plate and the base and the connecting surfaces of bushing one and bushing two are on the same plane.

[0006] Preferably, a warped edge is provided between the outer edge of the upper plate and the base.

[0007] More preferably, the upper plate includes a middle part and an outer edge part, the middle part protrudes downward to match the groove on the base, and at least one gap is provided between the outer edge part and the base to form a warping opening. The four sides of the base have warping openings for easy warping to prevent the clamp from being assembled too tightly and difficult to separate.

[0008] Furthermore, the cross-sections of the upper plate and the base are octagonal, the lengths of the longer odd sides are equal, the lengths of the shorter even sides are equal, and the warped edge is located between the even sides and the base.

[0009] Furthermore, the bottom edge of the middle part of the upper plate protruding downward is an arc surface, which constitutes a guide matching surface, and the base is provided with a structure matching with the guide matching surface. The guide matching surface of the upper plate and the guide matching surface of the base can accurately ensure the concentricity requirements of the bushing 1 and the bushing 2.

[0010] Preferably, the upper plate and the base are connected by assembly bolts, which can accurately ensure the assembly thickness requirements of the fixture and maintain consistency with the thickness of the vehicle's matching parts.

[0011] The utility model has a simple structure and is easy to assemble, does not involve difficult production processes, and traditional processing techniques can meet production requirements.

[0012] The utility model has a simple structure, is basically consistent with the traditional production process, is economical and practical, has low processing cost, and has controllable assembly accuracy. While reducing the difficulty of the manufacturing process, the first bushing and the second bushing can be press-fitted separately. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the integrated fixture in use;

[0014] Figure 2 This is a cross-sectional view of the integrated fixture when in use;

[0015] Figure 3 is a schematic diagram of bushing 2;

[0016] Figure 4 is a cross-sectional view of bushing 2;

[0017] Figure 5 is a schematic diagram of bushing 1;

[0018] Figure 6 is a cross-sectional view of bushing 1;

[0019] Figure 7 A schematic diagram of the test fixture provided by the utility model when in use;

[0020] Figure 8 A cross-sectional view of the test fixture provided by the utility model when in use;

[0021] Fig. 9 is a schematic diagram of the upper plate;

[0022] Fig.10 is a cross-sectional view of the upper plate;

[0023] Fig.11is a schematic diagram of the base;

[0024] Fig.12 A cross-sectional view of the base. DETAILED DESCRIPTION

[0025] In order to make the present invention more clearly understood, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0026] Example

[0027] like Figure 7-12 As shown, a test fixture provided by the utility model includes a fixture body, a through cavity for placing a workpiece is provided in the fixture body, and both ends of the workpiece are fixed to the fixture body by bushing 1 and bushing 2 respectively. It is characterized in that the fixture body includes an upper plate 3 and a base 4 arranged up and down, the through cavity in the upper plate 3 and the bushing 1, the through cavity in the base 4 and the bushing 2, and the connecting surfaces of the upper plate 3 and the base 4 and the connecting surfaces of the bushing 1 and the bushing 2 are on the same plane.

[0028] The upper plate 3 includes a middle portion and an outer edge portion, the middle portion protrudes downward to match the groove on the base 4, and at least one gap is provided between the outer edge portion and the base 4 to form a warp a. The cross-sections of the upper plate 3 and the base 4 are octagonal, the lengths of the longer odd sides are equal, and the lengths of the shorter even sides are equal, and the warp a is located between the even sides and the base 4. The bottom edge of the middle portion of the upper plate 3 protruding downward is an arc surface, which constitutes a guide matching surface b, and a structure matching the guide matching surface b is provided on the base 4.

[0029] The upper plate 3 and the base 4 are connected by assembly bolts 5 .

[0030] The new structure of the upper plate 3 and the base 4 of the utility model solves the problem that the bushing can be pressed in and out separately, and avoids the problem that the bushing is difficult to withdraw after being pressed in; the base 4 has convenient warping edges on all four sides to avoid the fixture being assembled too tightly and difficult to separate; the concentricity requirements of the bushing 1 and the bushing 2 2 can be accurately guaranteed through the guiding matching surface b of the upper plate 3 and the guiding matching surface b of the base 4; the upper plate 3 and the base 4 are connected by four assembly bolts 5, so the assembly thickness requirements of the fixture can be accurately guaranteed to keep consistent with the thickness of the matching parts of the whole vehicle.

Claims

1. A test fixture, comprising a fixture body, wherein a through cavity for placing a workpiece is provided in the fixture body, and two ends of the workpiece are respectively fixed to the fixture body by a bushing 1 (1) and a bushing 2 (2), wherein: The clamp body comprises an upper plate (3) and a base (4) arranged up and down, a through cavity in the upper plate (3) and a bushing 1 (1), a through cavity in the base (4) and a bushing 2 (2), and a connecting surface of the upper plate (3) and the base (4) and a connecting surface of the bushing 1 (1) and the bushing 2 (2) are on the same plane.

2. The test fixture according to claim 1, characterized in that A warped opening (a) is provided between the outer edge of the upper plate (3) and the base (4).

3. The test fixture according to claim 2, characterized in that The upper plate (3) comprises a middle portion and an outer edge portion, the middle portion protrudes downward to match the groove on the base (4), and a warped opening (a) formed by at least one gap is provided between the outer edge portion and the base (4).

4. The test fixture according to claim 3, characterized in that The cross-sections of the upper plate (3) and the base (4) are octagonal, the lengths of the longer odd sides are equal, the lengths of the shorter even sides are equal, and the warped edge (a) is located between the even sides and the base (4).

5. The test fixture according to claim 3, characterized in that: The bottom edge of the downwardly protruding middle portion of the upper plate (3) is an arc surface, which constitutes a guide matching surface (b), and the base (4) is provided with a structure matching the guide matching surface (b).

6. The test fixture according to claim 1, characterized in that The upper plate (3) and the base (4) are connected via assembly bolts (5).

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