Static contact assembly

Abstract

The utility model discloses a static contact assembly which comprises a static contact set frame, a moving contact is in threaded connection with the interior of the static contact set frame, a static contact piece is placed at the bottom of the inner side of the static contact set frame, a limiting groove is formed in the lower end of the static contact piece, and a limiting block is in sliding connection with the inner side of the limiting groove. The front end of the static contact piece is fixedly connected with a current-carrying contact piece, the upper end of the static contact piece is fixedly connected with a limiting head, and the upper end of the limiting head is fixedly connected with a butt joint. According to the static contact assembly provided by the utility model, the static contact piece is placed in the inner side of the static contact assembly frame, the limiting groove is clamped at the outer side of the limiting block, and when the moving contact moves downwards, the moving contact is sleeved in the inner side of the limiting ring, and the limiting groove is clamped at the outer side of the limiting head. The purpose of conveniently limiting the position where the moving contact contacts with the static contact piece is achieved, so that the moving contact accurately contacts with the designated position of the static contact piece, and it can be guaranteed that the moving contact effectively and reliably connects and disconnects the static contact piece.

Description

Technical Field

[0001] The utility model relates to the technical field of static contact assemblies, in particular to a static contact assembly. Background Art

[0002] Among the many components of a circuit breaker, the static contact assembly is one of the most critical mechanisms. It is usually made of a copper alloy material with high conductivity, and the surface is specially treated to improve wear resistance and conductivity. The precise coordination between the static contact and the moving contact directly determines the key performance indicators of the circuit breaker, such as the switching capacity, electrical life, and contact resistance. A high-quality static contact assembly must not only have excellent electrical and thermal conductivity, but also good mechanical strength and resistance to arc erosion. These characteristics together ensure that the circuit breaker can maintain stable electrical performance and safety and reliability during long-term use.

[0003] Traditional static contact assemblies have some shortcomings. The contact system is an important component of the switch, including the moving contact and the static contact. After the moving contact moves, it contacts or separates with the static contact, thereby connecting or disconnecting the switch. If the moving contact only contacts the static contact by simply spiraling down, it may cause inaccurate contact, making it difficult to achieve reliable switching. Utility Model Content

[0004] The main purpose of the present invention is to provide a static contact assembly that can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A static contact assembly comprises a static contact group frame, the internal thread of the static contact group frame is connected to the moving contact, a static contact piece is placed on the inner bottom of the static contact group frame, a limiting groove is provided at the lower end of the static contact piece, a limiting block is slidably connected to the inner side of the limiting groove, the front end of the static contact piece is fixedly connected to the current-carrying contact piece, the upper end of the static contact piece is fixedly connected to the limiting head, the upper end of the limiting head is fixedly connected to the docking head, the lower end of the moving contact is provided with a limiting groove, the inner side of the current-carrying contact piece is fixedly connected to the current-carrying static contact, the upper end of the static contact piece is fixedly connected to the outer side of the limiting head near the limiting ring, and the upper end of the limiting ring is fixedly connected to the docking ring.

[0007] Preferably, the static contact assembly frame is rectangular in shape, and the lower end of the limiting block is fixedly connected to the inner bottom of the static contact assembly frame.

[0008] Preferably, the limiting block is trapezoidal in shape, the limiting groove is trapezoidal in shape, the limiting block and the limiting groove match each other, and the axis lines of the moving contact, the limiting head and the docking head are located on the same straight line.

[0009] Preferably, the limiting head is truncated cone-shaped, the limiting head and the docking head are both located inside the limiting groove, and the axis lines of the moving contact, the limiting ring and the docking ring are located on the same straight line.

[0010] Preferably, the inner side of the limiting ring is movably connected to the outer side of the moving contact, and the inner side of the docking ring is movably connected to the outer side of the moving contact close to the upper side of the limiting ring.

[0011] Preferably, a fastening knob is fixedly connected to the upper end of the moving contact, a cross slot is provided on the upper end of the fastening knob, and the diameter of the fastening knob is larger than the diameter of the moving contact.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] By placing the static contact piece on the inner side of the static contact assembly frame and making the limiting groove stuck on the outer side of the limiting block, and when the moving contact moves downward, the moving contact is sleeved on the inner side of the limiting ring, and the limiting groove is stuck on the outer side of the limiting head, the purpose of facilitating the position at which the moving contact contacts the static contact piece can be limited, so that the moving contact can accurately contact the specified position of the static contact piece, thereby ensuring that the moving contact can effectively and reliably switch the static contact piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a static contact assembly of the present utility model;

[0015] Figure 2 This is a schematic diagram of the local structure of a static contact assembly of the utility model Figure 1 ;

[0016] Figure 3 This is a schematic diagram of the local structure of a static contact assembly of the utility model Figure 2 ;

[0017] Figure 4 This is a schematic diagram of the local structure of a static contact assembly of the utility model Figure 3 .

[0018] In the figure: 1. Static contact assembly frame; 2. Moving contact; 3. Static contact piece; 4. Limiting groove; 5. Limiting block; 6. Current-carrying contact piece; 7. Limiting head; 8. Docking head; 9. Limiting groove; 10. Fastening knob; 11. Current-carrying static contact; 12. Limiting ring; 13. Docking ring. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] like Figure 1-4As shown, a static contact assembly includes a static contact group frame 1, the internal thread of the static contact group frame 1 is connected to the moving contact 2, a static contact piece 3 is placed on the inner bottom of the static contact group frame 1, a limiting groove 4 is provided at the lower end of the static contact piece 3, a limiting block 5 is slidably connected to the inner side of the limiting groove 4, the front end of the static contact piece 3 is fixedly connected to the current-carrying contact piece 6, the upper end of the static contact piece 3 is fixedly connected to the limiting head 7, the upper end of the limiting head 7 is fixedly connected to the docking head 8, a limiting groove 9 is provided at the lower end of the moving contact 2, the inner side of the current-carrying contact piece 6 is fixedly connected to the current-carrying static contact 11, the upper end of the static contact piece 3 is fixedly connected to the outer side of the limiting head 7, and the upper end of the limiting ring 12 is fixedly connected to the docking ring 13.

[0021] In this embodiment, the shape of the static contact group frame 1 is rectangular, the lower end of the limiting block 5 is fixedly connected to the inner bottom of the static contact group frame 1, the shape of the limiting block 5 is trapezoidal, the shape of the limiting groove 4 is trapezoidal, the limiting block 5 and the limiting groove 4 match each other, the axis lines of the moving contact 2, the limiting head 7, and the docking joint 8 are located on the same straight line, the shape of the limiting head 7 is truncated cone, the limiting head 7 and the docking joint 8 are both located on the inner side of the limiting groove 9, the axis lines of the moving contact 2, the limiting ring 12, and the docking ring 13 are located on the same straight line, the inner side of the limiting ring 12 is movably connected to the outer side of the moving contact 2, and the inner side of the docking ring 13 is movably connected to the outer side of the moving contact 2 near the upper side of the limiting ring 12.

[0022] Specifically, first place the static contact piece 3 on the edge of the inner side of the static contact assembly frame 1 so that the limiting groove 4 corresponds to the limiting block 5, and then push the static contact piece 3 so that the limiting groove 4 is stuck on the outside of the limiting block 5. Since the limiting block 5 is trapezoidal in shape, the static contact piece 3 is stuck in the inner side of the static contact assembly frame 1, so that the moving contact 2 is first moved to the inner side of the docking ring 13, so that the limiting groove 9 at the lower end of the moving contact 2 corresponds to the docking head 8, and the moving contact 2 is then moved downward, so that the limiting groove 9 is stuck on the outside of the docking head 8 and the limiting head 7, so that the moving contact 2 limits the static contact piece 3, and then By making the lower end of the moving contact 2 contact the upper end of the static contact piece 3, the connection between the moving contact 2 and the static contact piece 3 is completed. By placing the static contact piece 3 on the inner side of the static contact assembly frame 1, and making the limiting groove 4 stuck on the outer side of the limiting block 5, and when the moving contact 2 moves downward, the moving contact 2 is sleeved on the inner side of the limiting ring 12, and the limiting groove 9 is stuck on the outer side of the limiting head 7, the purpose of facilitating the contact position of the moving contact 2 to the static contact piece 3 is achieved, so that the moving contact 2 accurately contacts the specified position of the static contact piece 3, which can ensure that the moving contact 2 can effectively and reliably switch the static contact piece 3.

[0023] In this embodiment, a fastening knob 10 is fixedly connected to the upper end of the moving contact 2 . A cross slot is formed at the upper end of the fastening knob 10 . The diameter of the fastening knob 10 is larger than the diameter of the moving contact 2 .

[0024] Specifically, a screwdriver is inserted into the cross slot provided at the upper end of the tightening knob 10 and the screwdriver is rotated, so that the tightening knob 10 drives the movable contact 2 to rotate and move the movable contact 2 downward.

[0025] Working principle:

[0026] When in use, first place the static contact piece 3 on the edge of the inner side of the static contact group frame 1 so that the limiting groove 4 corresponds to the limiting block 5, and then push the static contact piece 3 so that the limiting groove 4 is stuck on the outside of the limiting block 5. Since the limiting block 5 is trapezoidal in shape, the static contact piece 3 is stuck in the inner side of the static contact group frame 1, and then insert the screwdriver into the cross slot opened at the upper end of the fastening knob 10, and turn the screwdriver to make the fastening knob 10 drive the moving contact 2 to rotate, and move the moving contact 2 downward, so that the moving contact 2 first moves to the inner side of the docking ring 13, so that the limiting groove 9 at the lower end of the moving contact 2 corresponds to the docking head 8, and the moving contact 2 is then moved downward, so that the limiting groove 9 is stuck in the docking head 8. The connector 8 and the outer side of the limiting head 7 limit the moving contact 2 to the static contact piece 3, and then the lower end of the moving contact 2 contacts the upper end of the static contact piece 3, thereby completing the connection between the moving contact 2 and the static contact piece 3. By placing the static contact piece 3 on the inner side of the static contact assembly 1, and making the limiting groove 4 stuck on the outer side of the limiting block 5, and when the moving contact 2 moves downward, the moving contact 2 is sleeved on the inner side of the limiting ring 12, and the limiting groove 9 is stuck on the outer side of the limiting head 7, the purpose of facilitating the contact between the moving contact 2 and the static contact piece 3 is limited, so that the moving contact 2 accurately contacts the specified position of the static contact piece 3, which can ensure that the moving contact 2 can effectively and reliably switch the static contact piece 3.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A static contact assembly, comprising a static contact assembly frame (1), characterized in that: The internal thread of the static contact assembly frame (1) is connected to the moving contact (2), a static contact piece (3) is placed on the inner bottom of the static contact assembly frame (1), a limiting groove (4) is provided at the lower end of the static contact piece (3), a limiting block (5) is slidably connected to the inner side of the limiting groove (4), a front end of the static contact piece (3) is fixedly connected to a current-carrying contact piece (6), an upper end of the static contact piece (3) is fixedly connected to a limiting head (7), an upper end of the limiting head (7) is fixedly connected to a docking head (8), a limiting groove (9) is provided at the lower end of the moving contact (2), an inner side of the current-carrying contact piece (6) is fixedly connected to a current-carrying static contact (11), an upper end of the static contact piece (3) is fixedly connected to the outer side of the limiting head (7), and an upper end of the limiting ring (12) is fixedly connected to a docking ring (13).

2. A static contact assembly according to claim 1, characterized in that: The static contact assembly frame (1) is rectangular in shape, and the lower end of the limiting block (5) is fixedly connected to the inner bottom of the static contact assembly frame (1).

3. The static contact assembly according to claim 1, characterized in that: The limiting block (5) is in the shape of a trapezoid, the limiting slot (4) is in the shape of a trapezoid, the limiting block (5) matches the limiting slot (4), and the axis lines of the moving contact (2), the limiting head (7), and the docking head (8) are located on the same straight line.

4. The static contact assembly according to claim 1, characterized in that: The limiting head (7) is truncated in shape, the limiting head (7) and the docking head (8) are both located inside the limiting groove (9), and the axis lines of the moving contact (2), the limiting ring (12), and the docking ring (13) are located on the same straight line.

5. The static contact assembly according to claim 1, characterized in that: The inner side of the limiting ring (12) is movably connected to the outer side of the moving contact (2), and the inner side of the docking ring (13) is movably connected to the outer side of the moving contact (2) close to the upper side of the limiting ring (12).

6. The static contact assembly according to claim 1, characterized in that: The upper end of the moving contact (2) is fixedly connected to a fastening knob (10), the upper end of the fastening knob (10) is provided with a cross slot, and the diameter of the fastening knob (10) is larger than the diameter of the moving contact (2).

Images