Test fixture for surface contact resistance of electro-hydraulic servo valve

Abstract

The utility model discloses a test fixture for electro-hydraulic servo valve surface contact resistance, which comprises a fixing assembly, a connecting assembly and an adapter assembly, the fixing assembly is detachably connected with an electro-hydraulic servo valve, the connecting assembly is fixedly arranged in the fixing assembly, one end of the connecting assembly is electrically connected with the electro-hydraulic servo valve, and the other end of the connecting assembly is electrically connected with the adapter assembly. And the other end of the connecting assembly is connected with the test end of the test equipment through the switching assembly. According to the electro-hydraulic servo valve surface contact resistance test fixture, the inner diameter of the main fixing block, the buckles of the auxiliary fixing block and the corresponding lengths of the inner test assembly and the outer test assembly are adjusted, so that the electro-hydraulic servo valve surface contact resistance test fixture is stable in performance, high in test efficiency and stable and reliable in test data during electro-hydraulic servo valve surface contact resistance test.

Description

Technical Field

[0001] This utility model relates to the field of contact testing, and in particular to a test fixture for the surface contact resistance of an electro-hydraulic servo valve. Background Technology

[0002] Electro-hydraulic servo valves are common components in aero-engines. Testing fixtures are essential tools for evaluating their electrical performance. Electro-hydraulic valves are diverse and numerous, with stringent testing requirements. However, current testing fixtures can only meet the needs of testing some simple electro-hydraulic servo valves. For more complex electro-hydraulic servo valve products, issues may arise such as unstable connections between the test piece and the fixture, leading to inconsistent test data; excessive fixture force causing test marks on the product, resulting in unacceptable appearance; and low operational efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a test fixture for the surface contact resistance of electro-hydraulic servo valves.

[0004] To achieve the above objectives, this utility model is implemented according to the following technical solution:

[0005] This utility model includes a fixing component, a connecting component, and an adapter component. The fixing component is detachably connected to the electro-hydraulic servo valve. The connecting component is fixedly disposed within the fixing component. One end of the connecting component is electrically connected to the electro-hydraulic servo valve, and the other end of the connecting component is connected to the test end of the test equipment through the adapter component.

[0006] Furthermore, the fixing component includes a fixing base and spring fixing plates. The fixing base is a tubular structure, and there are multiple spring fixing plates. One end of each of the multiple spring fixing plates is fixed to the outer circumference of one end of the fixing base, and the other end of each of the multiple spring fixing plates contacts the outer wall of the electro-hydraulic servo valve. The adapter component is detachably fixed to the other end of the fixing base, and the connecting component is disposed inside the fixing base.

[0007] Furthermore, the connecting assembly includes a valve body main contact head and a valve body secondary contact head. One end of both the valve body main contact head and the valve body secondary contact head are electrically connected to the adapter assembly. The valve body main contact head is located at the bottom of the fixed seat, and the valve body secondary contact head is located at the edge of the fixed seat where the spring fixing piece is located. When the electro-hydraulic servo valve is installed on the fixed seat, the valve body main contact head contacts the bottom contact of the electro-hydraulic servo valve, and the valve body secondary contact head contacts the outer housing contact of the electro-hydraulic servo valve.

[0008] Furthermore, the adapter assembly includes an adapter housing and an adapter circuit board. The main contact head and the secondary contact head of the valve body are both fixed on the adapter circuit board and are fixedly connected to the contacts of the adapter circuit board. The adapter circuit board is fixedly disposed inside the adapter housing, and the adapter housing is detachably fixedly connected to the fixing base.

[0009] The beneficial effects of this utility model are:

[0010] This invention relates to a test fixture for the surface contact resistance of an electro-hydraulic servo valve. Compared with the prior art, this invention achieves surface contact resistance testing of the electro-hydraulic servo valve by adjusting the inner diameter of the main fixing block, the buckle of the secondary fixing block, and the corresponding lengths of the inner and outer test components. The test fixture has stable performance, high testing efficiency, and stable and reliable test data. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0013] In the diagram: 1. Fixing base; 2. Spring fixing plate; 3. Valve body main contact head; 4. Valve body secondary contact head; 5. Adapter housing; 6. Adapter circuit board. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0015] like Figure 1 and 2 As shown: This utility model includes a fixing component, a connecting component, and an adapter component. The fixing component is detachably connected to the electro-hydraulic servo valve. The connecting component is fixedly disposed within the fixing component. One end of the connecting component is electrically connected to the electro-hydraulic servo valve, and the other end of the connecting component is connected to the test end of the testing equipment through the adapter component.

[0016] Furthermore, the fixing component includes a fixing base 1 and spring fixing plates 2. The fixing base 1 is a tubular structure, and there are multiple spring fixing plates 2. One end of each of the multiple spring fixing plates 2 is fixed to the outer circumference of one end of the fixing base 1, and the other end of each of the multiple spring fixing plates 2 contacts the outer wall of the electro-hydraulic servo valve. The adapter component is detachably fixed to the other end of the fixing base 1, and the connecting component is disposed inside the fixing base 1.

[0017] Furthermore, the connecting assembly includes a valve body main contact head 3 and a valve body secondary contact head 4. One end of both the valve body main contact head 3 and the valve body secondary contact head 4 are electrically connected to the adapter assembly. The valve body main contact head 3 is located at the bottom of the fixed base 1, and the valve body secondary contact head 4 is located at the edge of the fixed base 1 where the spring fixing piece 2 is located. When the electro-hydraulic servo valve is installed on the fixed base 1, the valve body main contact head 3 contacts the bottom contact of the electro-hydraulic servo valve, and the valve body secondary contact head 4 contacts the outer housing contact of the electro-hydraulic servo valve.

[0018] Furthermore, the adapter assembly includes an adapter housing 5 and an adapter circuit board 6. The valve body main contact head 3 and the valve body secondary contact head 4 are both fixed on the adapter circuit board 6 and are fixedly connected to the contacts of the adapter circuit board 6. The adapter circuit board 6 is fixedly disposed inside the adapter housing 5. The adapter housing 5 and the fixing base 1 are detachably fixedly connected.

[0019] When this utility model is in use, the electro-hydraulic servo valve is inserted into the tubular structure of the fixing seat 1. At this time, the outer shell of the electro-hydraulic servo valve is locked by the elastic action of the spring fixing plate 2, which plays a fixing role. Multiple spring fixing plates 2 are set on the outer circumference of the fixing seat 1 for better fixation. When the electro-hydraulic servo valve is inserted into the fixing seat 1, its bottom contact contacts with the main contact head 3 of the valve body, and at the same time, the contact head of the outer shell contacts with the secondary contact head 4 of the valve body. The main contact head 3 and the secondary contact head 4 of the valve body are connected to the test terminal of the test equipment through the circuit board wiring on the adapter circuit board 6, thereby completing the test.

[0020] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A test fixture for the surface contact resistance of an electro-hydraulic servo valve, characterized in that: It includes a fixing component, a connecting component, and an adapter component. The fixing component is detachably connected to the electro-hydraulic servo valve. The connecting component is fixedly disposed within the fixing component. One end of the connecting component is electrically connected to the electro-hydraulic servo valve, and the other end of the connecting component is connected to the test terminal of the test equipment through the adapter component.

2. The test fixture for the surface contact resistance of an electro-hydraulic servo valve according to claim 1, characterized in that: The fixing component includes a fixing seat (1) and a spring fixing plate (2). The fixing seat (1) is a tubular structure. There are multiple spring fixing plates (2). One end of each of the multiple spring fixing plates (2) is fixed to the outer circumference of one end of the fixing seat (1). The other end of the multiple spring fixing plates (2) is in contact with the outer wall of the electro-hydraulic servo valve. The adapter component is detachably fixed at the other end of the fixing seat (1). The connecting component is arranged inside the fixing seat (1).

3. The test fixture for the surface contact resistance of an electro-hydraulic servo valve according to claim 2, characterized in that: The connecting assembly includes a valve body main contact head (3) and a valve body secondary contact head (4). One end of the valve body main contact head (3) and the valve body secondary contact head (4) are electrically connected to the adapter assembly. The valve body main contact head (3) is located at the bottom of the fixed seat (1), and the valve body secondary contact head (4) is located at one edge of the fixed seat (1) where the spring fixing piece (2) is located. When the electro-hydraulic servo valve is installed on the fixed seat (1), the valve body main contact head (3) contacts the bottom contact of the electro-hydraulic servo valve, and the valve body secondary contact head (4) contacts the outer housing contact of the electro-hydraulic servo valve.

4. The test fixture for the surface contact resistance of an electro-hydraulic servo valve according to claim 3, characterized in that: The adapter assembly includes an adapter housing (5) and an adapter circuit board (6). The valve body main contact head (3) and the valve body secondary contact head (4) are both fixed on the adapter circuit board (6) and are fixedly connected to the contacts of the adapter circuit board (6). The adapter circuit board (6) is fixedly disposed inside the adapter housing (5). The adapter housing (5) and the fixing seat (1) are detachably fixedly connected.

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