A relay contact pressure test structure

Abstract

The present invention discloses a relay contact pressure test structure, which includes a dynamometer. A lower working part is provided on the outer shell of the dynamometer. A rotating part is pivotally connected to the lower working part, and an upper working part is sleeved inside the rotating part. A notch is provided inside the rotating part, and an outer limit card slot is arranged in the notch. A stepped notch is also provided at the end of the rotating part. The upper working part includes an inner limit card provided on the circumferential side wall of the working part. A spring navigation ball is further provided on the circumferential side wall of the upper working part. A clamping plate is also provided on one side of the spring navigation ball. The inner limit card is assembled with the outer limit card slot, and the spring navigation ball abuts against the stepped notch of the rotating part. The lower working part, the rotating part, and the upper working part together form a test assembly. The advantages of the present invention are that when the T-shaped pointer head contacts the relay contact piece, it can easily make both contact pieces contact the test pointer, greatly reducing the test error and improving the measurement accuracy.

Description

Technical Field

[0001] The invention relates to a test structure, in particular to a pressure test structure. Background Art

[0002] Contact pressure is one of the main mechanical characteristic parameters of safety relays and an important indicator related to the reliability of relay applications. At present, the test of contact pressure is completed manually. Whether it is the adjustment process or the mechanical inspection process, workers need to operate each contact. The accuracy of the contact pressure test has high requirements for the experience and proficiency of the workers. The method of manually measuring contact pressure is: the force point of the dynamometer should be close to the front end of the contact on the reed, the test pointer of the dynamometer should be parallel to the plane of the reed, and gradually increase the pressure of the test pointer at the contact, and read the reading at the moment the contact is disconnected. Absolute horizontal manual testing cannot be guaranteed at all, and traditional mechanical dynamometers are also restricted by the force arm. The measurement position and hand-held posture requirements are relatively high, and even very skilled workers will inevitably experience visual fatigue, so manual measurement is bound to increase the unstable factor. Summary of the invention

[0003] In order to solve the above problems, the present invention discloses a relay contact pressure testing structure.

[0004] The specific technical solutions are as follows:

[0005] A relay contact pressure test structure comprises a dynamometer, wherein a lower working part is provided on an outer shell of the dynamometer, a rotating part is axially connected to the lower working part, an upper working part is sleeved inside the rotating part, a notch is provided inside the rotating part, an outer limit card slot is provided inside the notch, and a stepped notch is also provided at the end of the rotating part; the upper working part comprises an inner limit card arranged on a circumferential side wall of the working part, a spring navigation ball is also provided on the circumferential side wall of the upper working part, a card plate is also provided on one side of the spring navigation ball, the inner limit card is assembled with the outer limit card slot, the spring navigation ball abuts against the stepped notch of the rotating part, and the lower working part, the rotating part and the upper working part together constitute a test assembly.

[0006] One end of the test assembly is connected to the dynamometer, and the other end is connected to the T-shaped pointer head.

[0007] The advantages of the present invention are that when the T-shaped pointer head contacts the relay contact sheet, both contact sheets can be easily contacted with the test pointer, which greatly reduces the test quantity error and improves the measurement accuracy. At the same time, it also reduces the measurement error caused by insufficient contact, reduces the labor intensity of the staff, and ensures the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0009] Figure 2 It is a schematic structural diagram of a test component. Specific implementation manners

[0010] The present invention will be specifically described below in conjunction with the accompanying drawings. As Figure 1 , Figure 2 shown, a relay contact pressure test structure includes a dynamometer 1. A lower working part 2 is provided on the outer casing of the dynamometer 1. A rotating part 3 is pivotally connected to the lower working part 2. An upper working part 4 is sleeved inside the rotating part 3. A notch 5 is provided inside the rotating part 3. An outer limit card slot 501 is provided in the notch 5. A stepped notch 6 is also provided at the end of the rotating part 3. The upper working part 4 includes an inner limit card 7 provided on the circumferential side wall of the working part. A spring navigation ball 8 is also provided on the circumferential side wall of the upper working part. A clamping plate 9 is provided on one side of the spring navigation ball. The inner limit card 7 is assembled with the outer limit card slot 501. The spring navigation ball 8 abuts against the stepped notch 6 of the rotating part. The lower working part 2, the rotating part 3, and the upper working part 4 together form a test component 10.

[0011] One end of the test component 10 is connected to the dynamometer 1, and the other end is connected to a T-shaped pointer head 11.

[0012] The working principle of the present invention is as follows: The upper working part and the lower working part are fixedly connected through the stepped notch and the spring navigation ball. There are 4 outer limit card slots on the inner side of the outer casing of the rotating part. Every two of them respectively correspond to the inner limit cards of the upper working part. When inserting, first rotate the upper working part to make the inner limit card rotate to a position where it can be inserted into the middle of the outer limit card slot, and then insert it with a little force. Hearing a click sound means that the navigation spring ball has smoothly entered the stepped notch through the extrusion force and its own spring expansion and contraction characteristics. Then gently rotate the pointer upper working part by hand to see if it can rotate flexibly within the limit range. After assembly, normal contact pressure testing can be carried out.

Claims

1. A relay contact pressure test structure, including a dynamometer, characterized in that: The outer shell of the dynamometer is provided with a lower working part, the rotating part is pivotally connected to the lower working part, the upper working part is sleeved inside the rotating part, a notch is provided inside the rotating part, an outer limit card slot is provided in the notch, and a stepped notch is also provided at the end of the rotating part; the upper working part includes an inner limit card arranged on the circumferential side wall of the working part, a spring navigation ball is also provided on the circumferential side wall of the upper working part, a clamping plate is also provided on one side of the spring navigation ball, the inner limit card is assembled with the outer limit card slot, the spring navigation ball abuts against the stepped notch of the rotating part, and the lower working part, the rotating part, and the upper working part together form a test component; one end of the test component is connected to the dynamometer, and the other end is connected to a T-shaped pointer head.

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