Circuit breaker mechanism

Abstract

A circuit breaker mechanism is characterized in that the circuit breaker mechanism comprises a shell, a handle, a U-shaped rod, a lock catch, a linkage piece, a linkage spring and a static contact, the handle, the U-shaped rod, the lock catch, the linkage piece, the linkage spring and the static contact are arranged in the shell, the linkage piece and the lock catch are rotationally arranged in the shell and are concentrically arranged, the lock catch is provided with a fixing groove, and the linkage piece is provided with a pressing part opposite to the fixing groove; the linkage spring drives the pressing part to rotate and enables the pressing part to have a fixed state that the pressing part abuts against the fixing groove to form a fixing hole, one end of the U-shaped rod is arranged on the handle and is in linkage with the handle, and the other end of the U-shaped rod is arranged in the fixing hole and is in linkage with the lock catch and the linkage piece. The rotating handle enables the moving contact and the static contact to have an abutting closing state and a mutually separated opening state. The linkage piece is a metal piece, a fixing block is arranged on the linkage piece, an alignment block is arranged on the lock catch, and a contact state in which the alignment block abuts against the fixing block and a separation state in which the alignment block is separated from the fixing block are arranged between the fixing block and the alignment block.

Description

Technical Field

[0001] The utility model relates to a circuit breaker mechanism, in particular to a circuit breaker mechanism. Background Art

[0002] A circuit breaker is a switching device that can close, carry and interrupt current under normal circuit conditions, and can close, carry and interrupt current under abnormal circuit conditions within a specified time. Circuit breakers can be used to distribute electrical energy, start asynchronous motors infrequently, and protect power lines and motors. When they suffer serious overloads, short circuits, undervoltage faults, etc., they can automatically cut off the circuit. Its function is equivalent to a combination of a fuse switch and an over- and under-temperature relay.

[0003] At present, the small circuit breakers on the market all have a 4-link structure, with many parts and complex assembly. In addition, under the condition of large current short circuit, the original electromagnetic coil still attracts and drives the operating mechanism to operate. This mechanism cannot be disconnected immediately, which may be dangerous under special circumstances. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a circuit breaker mechanism.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: including a shell and a handle, a U-shaped rod, a lock, a linkage part, a linkage spring, and a static contact arranged in the shell. The linkage part and the lock are rotatably arranged in the shell and are concentrically arranged. The lock is provided with a fixing groove. The linkage part has a pressing part opposite to the fixing groove. The linkage spring drives the pressing part to rotate and makes the pressing part have a fixed state that is against the fixing groove to form a fixed hole. One end of the U-shaped rod is provided on the handle and is linked with the handle, and the other end is provided in the fixed hole and forms a linkage with the lock and the linkage part. The linkage part is integrally provided with a moving contact. The rotating handle makes the moving contact and the static contact have a closing state in which they are against each other and an opening state in which they are separated from each other. A waist-round hole is provided on the handle for placing the U-shaped rod. In the closing state, the force is applied by the hand, and the U-shaped rod is fixed in the waist-round hole.

[0006] By adopting the above technical solution, when in use, the handle is rotated to drive the U-shaped rod to move. At the same time, under the action of the linkage spring, the linkage part rotates, and the moving contact approaches the static contact until the two contact each other, changing to the closed state, completing the action, simplifying the four-bar linkage into a three-bar linkage, simplifying the parts, and reducing the difficulty of installation.

[0007] The utility model is further configured as follows: it also includes a rotating shaft, the rotating shaft is arranged in the shell, the lock is provided with a rotating hole and constitutes the rotation of the lock along the rotating shaft, and the linkage is provided with a waist-shaped curved hole, the rotating shaft is located in the waist-shaped curved hole and constitutes the rotation of the linkage.

[0008] By adopting the above technical solution, the setting of the waist-shaped curved hole enables the linkage member to maintain the fit between the pressing portion and the fixing groove during the rotation process under the action of the linkage spring.

[0009] The utility model is further configured as follows: the linkage spring is a tension spring, one end of the linkage spring is arranged in the shell, and the other end is hooked in the waist-shaped curved hole.

[0010] The present invention is further configured such that: the pressing portion extends toward the location of the lock buckle.

[0011] By adopting the above technical solution, the pressing portion is extended outward so that the pressing portion can be thickened, thereby increasing the contact area.

[0012] The utility model is further configured as follows: the linkage part is a metal part, a fixed block is provided on the linkage part, an alignment block is provided on the lock buckle, and a contact state in which the alignment block and the fixed block are against each other and a separation state in which the alignment block and the fixed block are separated from each other are provided between the fixed block and the alignment block. During normal use, there is a gap between the fixed block and the alignment block, which is a separation state.

[0013] By adopting the above technical solution, when a short circuit occurs, the short-circuit current generates a Lorentz magnetic force to repel the moving contacts on the linkage part, thereby causing the linkage part and the lock to move relative to each other until the fixed block and the positioning block are offset, and then the linkage part drives the lock to unlatch, and the circuit breaker can be immediately opened after a large current is generated instantaneously, which is conducive to improving the short-circuit capacity.

[0014] The utility model is further configured such that the position where the alignment block and the fixed block abut against each other serves as a rotation fulcrum, and the ratio of the distance between the rotation fulcrum and the pressing portion to the distance between the pressing portion and the moving contact is in the range of 1:2.25-1:5.6. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the entire front view of the utility model in the open state;

[0016] Figure 2 This is a schematic diagram of the entire front view of the utility model in a closed state;

[0017] Figure 3 This is a schematic diagram of the front view of the utility model with the lock hidden in the open state;

[0018] Figure 4 This is a schematic diagram of the reverse side of the utility model in the closed state.

[0019] In the figure: 1. Housing; 2. Handle; 3. U-shaped rod; 4. Lock; 41. Fixing groove; 5. Linkage member; 51. Pressing part; 52. Waist-round bent hole; 6. Linkage spring; 7. Static contact; 71. Moving contact; 8. Rotating shaft; 91. Fixing block; 92. Alignment block. DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] like Figure 1-4 As shown, the utility model discloses a circuit breaker mechanism, including a housing 1 and a handle 2, a U-shaped rod 3, a lock 4, a linkage member 5, a linkage spring 6, and a static contact 7 arranged in the housing 1. The linkage member 5 and the lock 4 are rotatably arranged in the housing 1 and are arranged concentrically. The lock 4 is provided with a fixing groove 41. The linkage member 5 has a pressing portion 51 opposite to the fixing groove 41. The linkage spring 6 drives the pressing portion 51 to rotate and makes the pressing portion 51 have a fixed state with the fixing groove 41 to form a fixed hole. One end of the U-shaped rod 3 is provided on the handle 2 and is linked to the handle 2. The other end is arranged in the fixing hole and forms a linkage with the lock buckle 4 and the linkage member 5. The linkage member 5 is integrally provided with a moving contact 71. The rotating handle 2 makes the moving contact 71 and the static contact 7 have a closing state in which they are against each other and an opening state in which they are separated from each other. When in use, the handle 2 is rotated to drive the U-shaped rod 3 to move. At the same time, under the action of the linkage spring 6, the linkage member 5 is rotated, and the moving contact 71 approaches the static contact 7 until the two are against each other and change to the closing state, completing the action, simplifying the four-bar mechanism into a three-bar mechanism, simplifying the parts and reducing the difficulty of installation.

[0023] It also includes a rotating shaft 8, which is arranged in the shell 1. The lock buckle 4 is provided with a rotating hole and constitutes the rotation of the lock buckle 4 along the rotating shaft 8. A waist-shaped curved hole 52 is provided on the linkage part 5. The rotating shaft 8 is located in the waist-shaped curved hole 52 and constitutes the rotation of the linkage part 5. The setting of the waist-shaped curved hole 52 enables the linkage part 5 to maintain the fit between the pressing part 51 and the fixing groove 41 during the rotation process under the action of the linkage spring 6.

[0024] The linkage spring 6 is a tension spring, one end of which is arranged in the housing 1 , and the other end is hooked in the waist-shaped curved hole 52 .

[0025] The pressing portion 51 extends toward the location of the lock buckle 4 . Extending the pressing portion 51 outward allows the pressing portion 51 to be thickened, thereby increasing the contact area.

[0026] The linkage part 5 is a metal part, and a fixed block 91 is provided on the linkage part 5, and an alignment block 92 is provided on the lock buckle 4. There is a contact state between the fixed block 91 and the alignment block 92, in which the alignment block 92 and the fixed block 91 are against each other, and a separation state in which the alignment block 92 and the fixed block 91 are separated from each other. During normal use, there is a gap between the fixed block 91 and the alignment block 92, which is a separation state. When a short circuit occurs, the short-circuit current generates a Lorentz magnetic force to repel the moving contact 71 on the linkage part 5, thereby causing the linkage part 5 and the lock buckle 4 to move relative to each other until the fixed block 91 and the alignment block 92 are against each other, and then the linkage part 5 drives the lock buckle 4 to unbutton, and the switch can be opened immediately after a large current is generated, which is conducive to improving the short-circuit capacity.

[0027] The point where the alignment block 92 abuts the fixed block 91 serves as the pivot point 9. The ratio of the distance between the pivot point and the pressing portion 51 to the distance between the pressing portion 51 and the moving contact 71 is in the range of 1:2.25-1:5.6. Under the same applied force, the longer the length ratio, the higher the tripping speed.

[0028] Working process: When in use, turn the handle 2 to drive the U-shaped rod 3 to move. At the same time, under the action of the linkage spring 6, the linkage part 5 rotates, and the moving contact 71 approaches the static contact 7 until the two are offset and the switch is turned into the closed state to complete the action. When a short circuit occurs, the large current of the short circuit will instantly generate a Lorentz magnetic force to repel the moving contact 71 on the linkage part 5, thereby causing the linkage part 5 and the lock buckle 4 to move relative to each other until the fixed block 91 and the positioning block 92 are offset, and then the linkage part 5 drives the lock buckle 4 to unbutton, so that the switch can be opened faster.

Claims

1. A circuit breaker mechanism, characterized in that: The invention comprises a housing (1) and a handle (2), a U-shaped rod (3), a lock (4), a linkage member (5), a linkage spring (6), and a static contact (7) arranged in the housing (1). The linkage member (5) and the lock (4) are rotatably arranged in the housing (1) and are arranged concentrically. The lock (4) is provided with a fixing groove (41). The linkage member (5) has a pressing portion (51) opposite to the fixing groove (41). The linkage spring (6) drives the pressing portion (51) to rotate and makes the pressing portion (51) have a fixed state of being against the fixing groove (41) to form a fixed hole. One end of the U-shaped rod (3) is provided on the handle (2) and is linked to the handle (2). The movable contact (71) is provided on the linkage member (5), and the other end is provided in the fixing hole and forms a linkage with the lock catch (4) and the linkage member (5). The linkage member (5) is provided with a movable contact (71) in an integral body. The rotating handle (2) makes the movable contact (71) and the static contact (7) have a closing state in which they abut against each other and an opening state in which they are separated from each other. The linkage member (5) is a metal member. A fixing block (91) is provided on the linkage member (5). A positioning block (92) is provided on the lock catch (4). A contact state in which the positioning block (92) and the fixed block (91) abut against each other and a separation state in which the positioning block (92) and the fixed block (91) are separated from each other are provided between the fixing block (91) and the positioning block (92).

2. A circuit breaker mechanism according to claim 1, characterized in that: The invention also includes a rotating shaft (8), which is arranged in the housing (1); the lock buckle (4) is provided with a rotating hole and constitutes the rotation of the lock buckle (4) along the rotating shaft (8); the linkage member (5) is provided with a waist-shaped curved hole (52), and the rotating shaft (8) is located in the waist-shaped curved hole (52) and constitutes the rotation of the linkage member (5).

3. A circuit breaker mechanism according to claim 2, characterized in that: The linkage spring (6) is a tension spring. One end of the linkage spring (6) is arranged in the housing (1), and the other end is hooked in the waist-shaped curved hole (52).

4. A circuit breaker mechanism according to claim 1, characterized in that: The pressing portion (51) extends toward the location of the lock buckle (4).

5. A circuit breaker mechanism according to claim 1, characterized in that: The position where the alignment block (92) and the fixed block (91) abut against each other serves as a rotation fulcrum (9), and the ratio of the distance between the rotation fulcrum and the pressing portion (51) to the distance between the pressing portion (51) and the moving contact (71) is in the range of 1:2.25-1:5.6.

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