Rotary contact pressure testing device

Abstract

The invention relates to a rotary contact pressure testing device which is used for a contact assembly, the contact assembly comprises a rotating shaft with a cavity, a driven shaft, a moving contact and a spring set, the rotary contact pressure testing device comprises a base, a simulation static contact, a limiting mechanism and a dynamometer, the rotating shaft is rotated to a first state, the driven shaft moves in a through hole and is clamped with a limiting groove, and the spring set is clamped in the limiting groove; at the moment, the spring set forms pulling force on the moving contact, the second end of the moving contact is connected with the simulation static contact in a pressing mode, the dynamometer is pulled till the second end of the moving contact is just separated from the simulation static contact, and the contact pressure is measured. At the moment, the tension is the counter-acting force of the spring set on the pressure of the moving contact, the value displayed by the dynamometer is the contact pressure, the closed state of the moving contact and the static contact in the working process of the circuit breaker is simulated, the circuit breaker does not need to be assembled, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of contact pressure testing, and in particular to a rotary contact pressure testing device. Background Art

[0002] When the existing circuit breaker contact pressure test device performs a contact pressure test, the circuit breaker needs to be assembled, and then the pressure test device is inserted into the moving contact to obtain the pressure value of the moving contact. It is impossible to test the pressure of the moving contact before the circuit breaker is assembled. If the pressure is unqualified, the circuit breaker needs to be disassembled and the moving contact needs to be replaced, which has low work efficiency. Based on the above description, there is an urgent need for a moving contact pressure test device that simulates the closed state of the circuit breaker and does not require the assembly of the circuit breaker.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] In view of the deficiencies in the prior art, an embodiment of the present invention discloses a rotary contact pressure testing device, which solves the problem that the pressure of the moving contact cannot be tested before the circuit breaker is assembled. If the pressure is unqualified, the circuit breaker needs to be disassembled and the moving contact needs to be replaced, resulting in low work efficiency.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A rotary contact pressure testing device, used for a contact assembly, the contact assembly comprises a rotating shaft with a cavity, a driven shaft, a moving contact and a spring group, the rotating shaft is a hollow structure, the driven shaft passes through both sides of the rotating shaft and is located at the bottom end of the rotating shaft, the first end of the moving contact is rotatably connected to the rotating shaft, and the second end extends out of the rotating shaft, the first end of the spring group is connected to the rotating shaft, and the second end is connected to the moving contact, the rotary contact pressure testing device comprises a base, a simulated static contact, a limiting mechanism and a dynamometer, mounting brackets are provided on both sides of the top of the base, both sides of the rotating shaft can be rotatably clamped in the mounting bracket, the second end of the moving contact extends out of the mounting bracket, the simulated static contact is provided at the top of the base and is located at the second end of the mounting bracket, the limiting mechanism comprises a through hole opened at the bottom end of the mounting bracket, and a limiting groove is opened at the second end of the through hole; the test end of the dynamometer is connected to the second end of the moving contact;

[0007] Among them, when the rotating shaft is rotated to the first state, the driven shaft moves in the through hole and engages with the limit groove. At this time, the spring group forms a pulling force on the moving contact, and the second end of the moving contact is pressed against the simulated static contact. The dynamometer is pulled until the second end of the moving contact is just separated from the simulated static contact to measure the contact pressure.

[0008] A further technical solution is that the limiting mechanism comprises a limiting block, the limiting groove is arranged at a first end of the limiting block, and the limiting block abuts against a second end in the through hole.

[0009] A further technical solution is that the contact assembly also includes a center axis, which passes through both sides of the rotating shaft and the first end of the moving contact, and the center axis is located at the center of the rotating shaft. A rotating shaft groove is provided at the top of the mounting frame, and the rotating shaft can be rotatably mounted in the rotating shaft groove.

[0010] A further technical solution is that the contact assembly also includes a driving shaft, which passes through both sides of the rotating shaft and is located at the top of the rotating shaft. A rotation limit groove is also provided at the top of the mounting frame, and the driving shaft moves in the rotation limit groove.

[0011] A further technical solution is that assembly parts are provided on both sides of the rotating shaft, the central axis passes through the assembly parts and the first end of the moving contact, and the assembly parts are rotatably mounted in the rotating shaft groove.

[0012] A further technical solution is that the rotating shaft is made of non-conductive material.

[0013] A further technical solution is that the rotary contact pressure test device also includes a power supply and a buzzer, wherein the first end of the power supply is connected to the base, the second end is connected to the first end of the buzzer, and the second end of the buzzer is connected to the central axis. The power supply, the buzzer, the central axis, the moving contact, the moving contact point, the simulated static contact and the base form a circuit path.

[0014] A further technical solution is that a moving contact is provided at the bottom of the second end of the moving contact, and in the first state, the moving contact is pressed against the simulated static contact.

[0015] A further technical solution is that a test hole is provided on the top of the second end of the moving contact, and the dynamometer passes through the test hole and hooks the moving contact.

[0016] The beneficial effects of the embodiments of the present invention are as follows:

[0017] (1) A rotary contact pressure test device is used for a contact assembly. The contact assembly includes a rotating shaft with a cavity, a driven shaft, a moving contact and a spring group. The rotary contact pressure test device includes a base, a simulated static contact, a limiting mechanism and a dynamometer. The rotating shaft is rotated to the first state, and the driven shaft moves in the through hole and engages with the limit groove. At this time, the spring group forms a pulling force on the moving contact, and the second end of the moving contact is crimped to the simulated static contact. The dynamometer is pulled until the second end of the moving contact is just separated from the simulated static contact to measure the contact pressure. At this time, the pulling force is the reaction force of the spring group to the moving contact pressure. At this time, the value displayed by the dynamometer is the contact pressure, which simulates the closed state of the moving contact and the static contact during the operation of the circuit breaker, and there is no need to assemble the circuit breaker, which improves the work efficiency.

[0018] (ii) Furthermore, the contact assembly also includes a driving shaft, which passes through both sides of the rotating shaft and is located at the top of the rotating shaft. A rotation limit groove is also provided at the top of the mounting frame, and the driving shaft moves in the rotation limit groove to prevent the contact system from rotating at an excessive angle and causing the spring to fail.

[0019] (III) Furthermore, assembly parts are provided on both sides of the rotating shaft, the central shaft passes through the assembly parts and through the first end of the moving contact, and the assembly parts are rotatably mounted in the rotating shaft groove. The rotating shaft is made of non-conductive material, so that the contact assembly and the base have only one conductive point, which is the contact point where the simulated static contact and the moving contact are in contact. The rotary contact pressure testing device also includes a power supply and a buzzer, the first end circuit of the power supply is connected to the base, the second end circuit is connected to the first end of the buzzer, and the second end circuit of the buzzer is connected to the central shaft. The buzzer, power supply, moving contact and base form a circuit path, and the working state of the buzzer is used to observe whether the second end of the moving contact is separated from the simulated static contact, so that the data measured by the dynamometer is more accurate and the accuracy of the test is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view structural schematic diagram of the first state of the rotary contact pressure testing device of the present invention.

[0021] Figure 2 It is a front view structural schematic diagram of the second state of the rotary contact pressure testing device of the present invention.

[0022] Figure 3 It is a schematic diagram of the structure of the rotary contact pressure testing device of the present invention from top view.

[0023] Figure 4 It is a front view structural schematic diagram of the contact assembly in the rotary contact pressure testing device of the present invention.

[0024] In the figure:

[0025] 1. Contact assembly; 11. Rotating shaft; 12. Driven shaft; 13. Moving contact; 14. Spring group; 15. Center shaft; 16. Driving shaft; 17. Assembly part; 18. Moving contact; 19. Test hole; 2. Base; 3. Simulated static contact; 4. Limiting mechanism; 41. Through hole; 42. Limiting groove; 43. Limiting block; 5. Mounting bracket; 51. Rotating shaft groove; 52. Rotation limiting groove; 6. Power supply; 7. Buzzer; 8. Dynamometer. DETAILED DESCRIPTION

[0026] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0027] In order to make the purpose, technical scheme and advantages of the present invention clearer, the device proposed by the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated by the accompanying drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the present invention can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the present invention.

[0028] Example:

[0029] Figure 1 It is a front view structural schematic diagram of the first state of the rotary contact pressure testing device of the present invention. Figure 3 It is a schematic diagram of the structure of the rotary contact pressure testing device of the present invention from top view. Figure 4 FIG. 1 is a front view of the structure of the contact assembly in the rotary contact pressure testing device of the present invention. Figure 1 , Figure 2 and Figure 4 As shown, a rotary contact pressure testing device is used for a contact assembly 1, wherein the contact assembly 1 includes a rotating shaft 11 having a cavity, a driven shaft 12, a moving contact 13 and a spring group 14, wherein the rotating shaft 11 is a hollow structure, the driven shaft 12 passes through both sides of the rotating shaft 11 and is located at the bottom end of the rotating shaft 11, the first end of the moving contact 13 is rotatably connected to the rotating shaft 11, and the second end extends out of the rotating shaft 11, and the first end of the spring group 14 is connected to the rotating shaft 11, and the second end is connected to the moving contact 13.

[0030] The rotary contact pressure test device includes a base 2, a simulated static contact 3, a limiting mechanism 4 and a dynamometer 8. A mounting frame 5 is provided on both sides of the top of the base 2, and both sides of the rotating shaft 11 are rotatably clamped in the mounting frame 5. Exemplarily, the contact assembly 1 also includes a central shaft 15, which passes through both sides of the rotating shaft 11 and the first end of the moving contact 13. The central shaft 15 is located at the center of the rotating shaft 11. A rotating shaft groove 51 is provided on the top of the mounting frame 5, and the rotating shaft 11 is rotatably mounted in the rotating shaft groove 51. The second end of the moving contact 13 extends out of the mounting frame 5, the simulated static contact 3 is provided at the top of the base 2, and is located at the second end of the mounting frame 5. The limiting mechanism 4 includes a through hole 41 opened at the bottom end of the mounting frame 5, and a limiting groove 42 is opened at the second end of the through hole 41. The test end of the dynamometer 8 is connected to the second end of the moving contact 13. For example, the dynamometer 8 is a digital push-pull dynamometer. Among them, the rotating shaft 11 is rotated to the first state, and the driven shaft 12 moves in the through hole 41 and engages with the limit groove 42. At this time, the spring group 14 forms a pulling force on the moving contact 13, and the second end of the moving contact 13 is crimped to the simulated static contact 3, and the dynamometer 8 is pulled until the second end of the moving contact 13 is just separated from the simulated static contact 3 to measure the contact pressure.

[0031] Furthermore, the limiting mechanism 4 includes a limit block 43, a limit groove 42 is opened at the first end of the limit block 43, the limit block 43 abuts against the second end in the through hole 41, and a detachable limit block 43 is arranged in the through hole 41. Before assembling the limit block 43, the contact assembly 1 is installed on the mounting frame 5, simulating the disconnection state of the moving contact 13 and the static contact during the operation of the circuit breaker. By replacing the limit blocks 43 of different sizes, it can be applicable to contact assemblies with different elastic limit spring groups 14.

[0032] Figure 2 FIG. 2 is a schematic diagram of the front view of the rotary contact pressure testing device of the present invention in the second state. Figure 2 As shown, further, the contact assembly 1 also includes a driving shaft 16, which passes through both sides of the rotating shaft 11 and is located at the top of the rotating shaft 11. A rotation limit groove 52 is also provided at the top of the mounting frame 5. The driving shaft 16 moves in the rotation limit groove 52 to prevent the rotating shaft 11 from rotating too much and causing the spring group 14 to fail.

[0033] like Figure 3 As shown, further, mounting portions 17 are provided on both sides of the rotating shaft 11, the central shaft 15 passes through the mounting portions 17 and the first end of the moving contact 13, and the mounting portions 17 are rotatably mounted in the rotating shaft groove 51. Exemplarily, the rotating shaft 11 is made of a non-conductive material, so that there is only one conductive point between the contact assembly 1 and the base 2 to simulate the contact between the static contact 3 and the moving contact 13.

[0034] like Figure 1As shown, further, the rotary contact pressure test device also includes a power supply 6 and a buzzer 7, the first end of the power supply 6 is circuit-connected to the base 2, the second end is circuit-connected to the first end of the buzzer 7, the second end of the buzzer 7 is circuit-connected to the central axis 15, and the power supply 6, the buzzer 7, the central axis 15, the moving contact 13, the moving contact 18, the simulated static contact 3 and the base 2 form a circuit path. The working state of the buzzer 7 is used to observe whether the second end of the moving contact 13 is separated from the simulated static contact 3.

[0035] like Figure 1 As shown, further, a moving contact 18 is provided at the bottom of the second end of the moving contact 13 , and the moving contact 18 is pressed against the simulated static contact 3 in the first state.

[0036] like Figure 1 As shown, further, a test hole 19 is opened at the top of the second end of the moving contact 13 , and the dynamometer 8 passes through the test hole 19 to hook the moving contact 13 .

[0037] When this embodiment is working:

[0038] The contact assembly 1 is assembled, the assembly portion 17 is mounted in the shaft groove 51, the external force drives the driving shaft 16 clockwise to abut the rotation limit groove 52, the shaft 11 rotates clockwise with the driving shaft 16 to the second state, the moving contact 18 presses the simulated static contact 3, and the spring group 14 forms a pulling force on the shaft 11 and the moving contact 13. The buzzer 7, the power supply 6, the moving contact 13 and the base 2 form a circuit path, and the buzzer 7 works. The limit block 43 is assembled into the through hole 41, and the second end of the limit block 43 abuts against the through hole 4 1. Release the external force. The rotating shaft 11 rotates counterclockwise to the first state under the action of the spring group 14. The driven shaft 12 moves in the through hole 41 and engages with the limit groove 42. At this time, the spring group 14 forms a pulling force on the moving contact 13. The moving contact 18 presses the simulated static contact 3. The dynamometer 8 passes through the test hole 19 to hook the moving contact 13. The dynamometer 8 is pulled until the moving contact 18 and the simulated static contact 3 are separated until the buzzer 7 stops working. At this time, the moving contact 18 and the simulated static contact 3 are just separated to measure the contact pressure. In this embodiment, the mounting frame 5 and the limiting groove 42 are arranged, the driven shaft 12 moves in the through hole 41 and engages with the limiting groove 42, the spring group 14 forms a pulling force on the moving contact 13, and the second end of the moving contact 13 is crimped to the simulated static contact 3, so as to simulate the closed state of the moving contact 13 and the static contact during the operation of the circuit breaker. The pressure of the moving contact 13 can be tested before the circuit breaker is assembled. If there is a moving contact 13 with unqualified pressure, there is no need to disassemble the circuit breaker to replace the moving contact 13, thereby improving the work efficiency.

[0039] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. Rotary contact pressure testing device, characterized in that: Used for a contact assembly (1), the contact assembly (1) comprising a rotating shaft (11) having a cavity, a driven shaft (12), a moving contact (13) and a spring group (14), the rotating shaft (11) being a hollow structure, the driven shaft (12) passing through both sides of the rotating shaft (11) and being located at the bottom end of the rotating shaft (11), the first end of the moving contact (13) being rotatably connected to the rotating shaft (11), and the second end extending out of the rotating shaft (11), the first end of the spring group (14) being connected to the rotating shaft (11), and the second end being connected to the moving contact (13), the rotary contact pressure testing device comprising: A base (2), wherein mounting frames (5) are provided on both sides of the top of the base (2), the two sides of the rotating shaft (11) are rotatably clamped in the mounting frames (5), and the second end of the moving contact (13) extends out of the mounting frames (5); A simulated static contact (3), the simulated static contact (3) being arranged at the top of the base (2) and located at the second end of the mounting frame (5); The limiting mechanism (4) comprises a through hole (41) formed at the bottom end of the mounting frame (5), and a limiting groove (42) is formed at the second end of the through hole (41); A dynamometer (8), a test end of which is connected to the second end of the moving contact (13); The rotating shaft (11) is rotated to a first state, the driven shaft (12) moves in the through hole (41) and engages with the limiting groove (42), at which time the spring group (14) generates a pulling force on the moving contact (13), the second end of the moving contact (13) is pressed against the simulated static contact (3), and the dynamometer (8) is pulled until the second end of the moving contact (13) is just separated from the simulated static contact (3), so as to measure the contact pressure.

2. The rotary contact pressure testing device according to claim 1, characterized in that: The limiting mechanism (4) comprises a limiting block (43), the limiting groove (42) is opened at a first end of the limiting block (43), and the limiting block (43) abuts against a second end in the through hole (41).

3. The rotary contact pressure testing device according to claim 1, characterized in that: The contact assembly (1) also includes a center shaft (15), the center shaft (15) passes through both sides of the rotating shaft (11) and passes through the first end of the moving contact (13), the center shaft (15) is located at the center of the rotating shaft (11), and a rotating shaft groove (51) is provided at the top of the mounting frame (5), and the rotating shaft (11) can be rotatably mounted in the rotating shaft groove (51).

4. The rotary contact pressure testing device according to claim 3, characterized in that: The contact assembly (1) further comprises a driving shaft (16), wherein the driving shaft (16) passes through both sides of the rotating shaft (11) and is located at the top of the rotating shaft (11); a rotation limiting groove (52) is also provided at the top of the mounting frame (5), and the driving shaft (16) moves in the rotation limiting groove (52).

5. The rotary contact pressure testing device according to claim 3, characterized in that: Mounting portions (17) are provided on both sides of the rotating shaft (11); the central shaft (15) passes through the mounting portions (17) and the first end of the moving contact (13); and the mounting portions (17) are rotatably mounted in the rotating shaft groove (51).

6. The rotary contact pressure testing device according to claim 5, characterized in that: The rotating shaft (11) is made of non-conductive material.

7. The rotary contact pressure testing device according to claim 6, characterized in that: The rotary contact pressure testing device also includes a power supply (6) and a buzzer (7), wherein a first end of the power supply (6) is connected to the base (2), a second end of the power supply (6) is connected to the first end of the buzzer (7), and a second end of the buzzer (7) is connected to the central axis (15). The power source (6), the buzzer (7), the central axis (15), the moving contact (13), the moving contact point (18), the simulated static contact (3) and the base (2) form a circuit path.

8. The rotary contact pressure testing device according to claim 1, characterized in that: A moving contact point (18) is provided at the bottom of the second end of the moving contact (13); in a first state, the moving contact point (18) is pressed against the simulated stationary contact (3).

9. The rotary contact pressure testing device according to claim 1, characterized in that: A test hole (19) is provided at the top of the second end of the moving contact (13), and the test end passes through the test hole (19) to hook the moving contact (13).

Images