Circuit breaker

Abstract

The utility model relates to a circuit breaker, which comprises a shell, a moving contact, a static contact and an operating mechanism for controlling the on / off of the moving contact and the static contact, the operating mechanism comprises an operating handle, a lever, a jump pin, a lock catch and a connecting rod, the operating handle is in linkage connection with the lever through the connecting rod, the jump pin is movably connected with the lever, the jump pin is in linkage connection with the lock catch, and the connecting rod is in linkage connection with the operating handle. The movable contact is in linkage connection with the lever through a linkage assembly, a reset structure for promoting the lock catch to reset is arranged between the lever and the lock catch, the movable contact is fixedly connected with the lever through the linkage assembly, and the lever is provided with the reset structure for promoting the lock catch to reset. The reset structure is independently arranged and is not affected by the rotating force of the lock catch, meanwhile, the reset force can be independently adjusted, and the auxiliary tripping assembly arranged on the lever can help the lock catch to be stably tripped when needed.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a circuit breaker. Background Art

[0002] The main function of a circuit breaker is to automatically cut off the power supply when a short circuit or severe overload occurs in the circuit to protect the circuit from damage. It can also be used to manually control the connection and disconnection of the circuit. Circuit breakers can be divided into high-voltage circuit breakers and low-voltage circuit breakers according to the operating voltage range. The internal structure of the circuit breaker includes a contact system, an operating mechanism, a protective device, etc. When the circuit is overloaded or short-circuited, the protective device will trigger the operating mechanism to separate the contacts, thereby cutting off the circuit.

[0003] Publication No.: CN105428171A discloses a circuit breaker, including a housing, a moving contact, a stationary contact, and an operating mechanism, wherein the operating mechanism includes an operating handle, a lever, a trip button, a lock button, and a connecting rod, wherein the operating handle is hingedly arranged with the housing, the operating handle and the trip button are connected via a connecting rod, a second shaft body and a third shaft body are arranged on the lever, the trip button is sleeved on the second shaft body, the moving contact is sleeved on the third shaft body, a bayonet is arranged on the lock button, a card block is arranged at a position corresponding to the bayonet on the trip button, and an arc-shaped transmission block is arranged on the trip button for contacting with the lock button when closing the circuit breaker , which can greatly reduce the friction between the tripping buckle and the lock buckle when closing the circuit breaker and extend its service life. However, the linkage between the operating mechanism lever and the lock buckle of this technology is poor, which makes the tripping ability of the circuit breaker poor when multiple assemblies are assembled. At the same time, a spring is used between the lever and the lock buckle for linkage and reset of the lock buckle. The reset spring between the lever and the lock buckle of this technology will be affected by the rotation force of the lock buckle, and the reset force cannot be adjusted separately. If the reset spring force is too large, the tripping buckle will not trip, and if the force is too small, the lock buckle will not be reset and the tripping buckle will trip. Therefore, there is still room for improvement in this technology. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a circuit breaker in view of the deficiencies of the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a circuit breaker, comprising a housing, a moving contact, a stationary contact, and an operating mechanism for controlling the moving contact and the stationary contact to be on or off, wherein the operating mechanism comprises an operating handle, a lever, a trip button, a lock button, and a connecting rod, wherein the operating handle is linked to the lever through a connecting rod, the trip button is movably connected to the lever, and the trip button is linked to the lock button, and is characterized in that: the moving contact is linked to the lever through a linkage component, and the lever is also provided with a reset structure capable of causing the lock button to reset.

[0006] By adopting the above technical scheme, the moving contact and the lever are fixedly connected through a linkage component, and the lever is provided with a reset structure for causing the lock to reset, so that the two functions of a spring structure used in the prior art are separated. When the circuit breaker is normally closed, the operating handle drives the lever, and the jump buckle arranged on the lever drives the lock buckle to be linked, and at the same time, the lever makes the moving contact and the static contact abut and energize through the linkage component; when a short circuit occurs when the circuit breaker is closed, the short-circuit protection of the circuit breaker toggles the lock buckle, so that the lock buckle and the jump buckle are disengaged, and the moving contact and the static contact are disconnected and the power is cut off. The setting of the reset structure can make the jump buckle and the lock buckle reset to normal state after being disengaged again, without affecting the normal closing of the circuit breaker. The reset structure is independently set and will not be affected by the rotation force of the lock buckle, and the reset force can be adjusted separately.

[0007] The above-mentioned circuit breaker can be further configured as follows: the linkage assembly includes a first elastic member, the lever is provided with a first shaft body, the moving contact and the first elastic member are sleeved on the first shaft body, the lever is provided with a clamping block located at the first shaft body, the moving contact is provided with a clamping groove clamped with the clamping block, the lever is provided with a first abutting groove for the first elastic member to abut, and the first elastic member is provided with a U-shaped connecting end at one end away from the lever, and the U-shaped connecting end is clamped with the moving contact.

[0008] By adopting the above technical solution, the moving contact is fixedly connected to the lever through the two ends of the first elastic member and the clamping groove provided on the lever. When the lever moves, it can drive the clamping groove to move. The two ends of the moving contact are connected through the first elastic member, and one end is clamped with the clamping block through the clamping groove. When the moving contact abuts against the static contact when the switch is closed, the elastic member can buffer the impact caused by the abutment, making the product more durable.

[0009] The above-mentioned circuit breaker can be further configured as follows: the reset structure includes a second shaft body arranged on the lever and a second elastic member sleeved on the second shaft body, the shaft body is provided with a first clamping groove, one end of the second elastic member sleeved on the second shaft body is provided with a clamping end clamped with the first clamping groove, and the lock is provided with a second abutting groove for the second elastic member to abut against one end away from the second shaft body.

[0010] By adopting the above technical solution, the second elastic member is sleeved on the second shaft and is clamped and fixed with the clamping end through the first clamping groove, and the other end of the second elastic member is abutted with the lock buckle through the second abutting groove. When the short-circuit protection of the circuit breaker toggles the lock buckle to disengage the lock buckle and the trip buckle, the elastic force of the elastic member can be used to reset the lock buckle and re-abut the trip buckle at one end abutting against the lock buckle, without affecting the normal closing of the circuit breaker. The separate elastic member setting can also facilitate the adjustment of the required torque, making the product more stable.

[0011] The above-mentioned circuit breaker can be further configured as follows: trip windows are symmetrically provided on both sides of the housing, and the lock is located at the trip window and has a combined trip hole for external pins to be plugged in.

[0012] By adopting the above technical solution, when the circuit breakers need to be used in combination, multiple circuit breakers are inserted into the tripping holes through the tripping windows by means of pins. When a circuit breaker is short-circuited and tripped, the multiple circuit breakers in the combination can be disconnected at the same time to avoid safety hazards and dangers. When the operating handle is turned, multiple circuit breakers can also be driven to close at the same time for easy use.

[0013] The above-mentioned circuit breaker may be further configured as follows: the lever is provided with an auxiliary tripping assembly abutting against the lock catch.

[0014] By adopting the above technical solution, when several combinations of existing circuit breakers are used, there is a situation where the force of tripping the circuit breaker combination becomes smaller as the circuit breaker combination is used later. An auxiliary tripping assembly abutting against the lock catch is provided on the lever, which can push the lock catch when the lever is tripped and returns to its position, and the auxiliary lock catch is tripped, which will not cause the situation where the force of tripping the circuit breaker combination becomes smaller as the circuit breaker combination is used later.

[0015] The above-mentioned circuit breaker may be further configured as follows: the auxiliary trip assembly includes an abutment block with a lever arranged at the combined tripping hole, the abutment block is arranged above the combined tripping hole, and the abutment block abuts against the combined tripping hole.

[0016] By adopting the above technical solution, the abutment block set on the lever abuts against the combined tripping hole. When the gate is closed, the lever is reset so that the abutment block applies downward force to the combined tripping hole to assist the lock to cut off the power. When multiple circuit breakers are used in combination, the subsequent circuit breakers can be stably cut off the power.

[0017] The above-mentioned circuit breaker can be further configured as follows: a groove is formed on the inner wall of the shell, a third shaft is provided on the side of the lever away from the lock, a third elastic member is sleeved on the third shaft, and an abutment pile is provided on the same side of the lever as the third shaft, one end of the third shaft abuts against the groove, and the end of the third shaft away from the inner wall abuts against the abutment column.

[0018] By adopting the above technical solution, the lever is provided with a third elastic member, one end of the third elastic member abuts against the abutment column, and the other end abuts against the groove formed on the inner wall, so that when the circuit breaker is disconnected, the lever can return to the initial state through the elastic force of the third elastic member, and at the same time, the moving contact and the static contact connected to the lever are separated to complete the power off.

[0019] The above-mentioned circuit breaker can be further configured as follows: the lever is provided with a fourth shaft, the lock is sleeved on the fourth shaft by providing a connecting hole, and the lock can be rotatably arranged on the lever through the fourth shaft and the connecting hole.

[0020] By adopting the above technical solution, the lock can be rotatably connected to the lever, the connection method is simple, and the reset structure can be linked with the lever to facilitate the disconnection and conduction of the circuit breaker and make the product more stable.

[0021] The above-mentioned circuit breaker can be further configured as follows: the lever is provided with a fifth shaft, the jump buckle is sleeved on the fifth shaft, the jump buckle is provided with a protrusion, and the lock buckle is provided with a third abutting groove for the protrusion to abut.

[0022] By adopting the above technical solution, the trip buckle and the lock buckle are linked in abutment. When the circuit breaker is short-circuited, the circuit breaker moves the lock buckle, and the trip buckle originally in the abutment state is separated from the lock buckle, and the trip buckle is disengaged, so that the lever drives the connected moving contact and static contact to disconnect and complete the power off.

[0023] The above-mentioned circuit breaker may be further configured as follows: the first elastic member, the second elastic member and the third elastic member are all torsion springs.

[0024] With the above technical solution, the first elastic member, the second elastic member and the third elastic member are torsion springs, which can efficiently store energy when twisted and provide rotational power when released. This energy conversion efficiency is relatively high. At the same time, the torsion spring can provide a relatively precise relationship between torque and rotation angle based on its design and manufacturing accuracy, which is very important for applications such as circuit breakers that require fine control of movement.

[0025] The beneficial effects of the utility model are as follows: the moving contact and the lever are fixedly connected through a linkage assembly, the lever is provided with a reset structure for causing the lock to reset, the two functions of a spring structure used in the prior art are separated, the reset structure is independently arranged, and will not be affected by the rotation force of the lock, while the reset force can be adjusted separately, and the auxiliary tripping assembly arranged on the lever can also help the lock to stably trip when needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2 It is the internal structure diagram of the utility model;

[0028] Figure 3 It is the linkage structure diagram of the utility model;

[0029] Figure 4 This is an exploded view of the reset structure of the utility model;

[0030] Figure 5 This is a rear view structural diagram of the lever of the utility model;

[0031] Figure 6 This is an exploded view of the lock structure of the utility model;

[0032] In the figure, 1-housing, 2-static contact, 3-moving contact, 4-operating handle, 5-lever, 6-jump buckle, 7-lock buckle, 8-connecting rod, 9-first elastic member, 10-first shaft, 11-clamping block, 12-clamping groove, 13-first abutting groove, 14-U-shaped connecting end, 15-second shaft, 16-second elastic member, 17-tripping window, 18-abutting block, 19-groove, 20-third shaft, 21-third elastic member, 22-abutting pile, 23-fourth shaft, 24-fifth shaft, 601-protrusion, 701-second abutting groove, 702-combined tripping hole, 703-connecting hole, 704-third abutting groove, 1501-first clamping slot, 1601-clamping end. DETAILED DESCRIPTION

[0033] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0034] like Figure 1-4The utility model provides the following technical solution: a circuit breaker, including a housing 1, a moving contact 3, a stationary contact 2, an operating mechanism for controlling the moving contact 3 and the stationary contact 2 to be turned on or off, the operating mechanism including an operating handle 4, a lever 5, a trip buckle 6, a lock buckle 7, and a connecting rod 8. The operating handle 4 is linked to the lever 5 through the connecting rod 8, the trip buckle 6 is movably connected to the lever 5, the trip buckle 6 is linked to the lock buckle 7, the moving contact 3 is linked to the lever 5 by setting a linkage component, the lever 5 is also provided with a reset structure that can cause the lock buckle 7 to reset, the moving contact 3 is fixedly connected to the lever 5 through the linkage component, the lever 5 and the lock buckle 7 are provided with a reset structure that causes the lock buckle 7 to reset, and the two functions of a spring structure used in the prior art are separated. When the switch is closed normally, the operating handle 4 drives the lever 5, and the trip buckle 6 provided on the lever 5 drives the lock buckle 7 to be linked, and at the same time, the lever 5 causes the moving contact 3 to abut against the stationary contact 2 through the linkage component to be energized;When a short circuit occurs during closing, the short-circuit protection of the circuit breaker toggles the lock buckle 7, so that the lock buckle 7 and the trip buckle 6 are released, and the moving contact 3 and the static contact 2 are disconnected and the power is cut off. The setting of the reset structure can reset the trip buckle 6 and the lock buckle 7 to the normal state after they are released again, without affecting the normal closing of the circuit breaker. The reset structure is independently set and will not be affected by the rotation force of the lock buckle 7. At the same time, the reset force can be adjusted separately, which strengthens the linkage of the product and makes the product more stable. The linkage component includes a first elastic member 9, a first shaft body 10 is provided on the lever 5, the moving contact 3 and the first elastic member 9 are sleeved on the first shaft body 10, the lever 5 is provided with a clamping block 11 at the first shaft body 10, and the moving contact 3 is provided with The clamping groove 12 is clamped with the clamping block 11, the lever 5 is provided with a first abutting groove 13 for the first elastic member 9 to abut, the first elastic member 9 is provided with a U-shaped connecting end 14 at one end away from the lever 5, the U-shaped connecting end 14 is clamped with the moving contact 3, the moving contact is fixedly linked and connected with the lever 5 through the two ends of the first elastic member 9 and the clamping groove 12 set by itself, when the lever 5 moves, it can drive the clamping groove 12 to move, the two ends of the moving contact 3 are connected through the first elastic member 9, and one end is clamped with the clamping block 11 through the clamping groove 12, when the closing moving contact 3 abuts against the static contact 2, the elastic member can buffer the impact caused by the abutment, so that the product is more durable, and the reset structure includes a reset structure arranged on the lever 5 The second shaft body 15 and the second elastic member 16 sleeved on the second shaft body 15, the shaft body is provided with a first clamping groove 1501, the second elastic member 16 and the second shaft body 15 are sleeved at one end and are provided with a clamping end 1601 clamped with the first clamping groove 1501, the lock buckle 7 is provided with a second abutting groove 701 for the second elastic member 16 to abut against one end away from the second shaft body 15, the second elastic member 16 is sleeved on the second shaft body 15 and is clamped and fixed with the clamping end 1601 through the first clamping groove 1501, and the other end of the second elastic member 16 abuts against the lock buckle 7 through the second abutting groove 701. When the short-circuit protection of the circuit breaker toggles the lock buckle 7, the lock buckle 7 is disengaged from the trip buckle 6, and the second elastic member 16 abuts against the lock buckle 7. One end can reset the lock buckle 7 and re-engage the trip buckle 6 through the elastic force of the elastic member, which does not affect the normal closing of the circuit breaker. The separate elastic member can also facilitate the adjustment of the required torque, making the product more stable. The housing 1 is symmetrically provided with trip windows 17 on both sides. The lock buckle 7 is located at the trip window 17 and is provided with a combined trip hole 702 for external pins to plug in. When the circuit breakers need to be used in combination, multiple circuit breakers are inserted into the trip holes through the trip windows 17 by the pins. When a circuit breaker is short-circuited and tripped, the multiple circuit breakers in the combination can be disconnected at the same time to avoid safety hazards. When the operating handle 4 is turned, multiple circuit breakers can also be driven to close at the same time for easy use. 。

[0035] like Figure 4-6A circuit breaker is shown, the lever 5 is provided with an auxiliary tripping assembly abutting against the lock 7. When several combinations of existing circuit breakers are used, there is a situation where the force of the circuit breaker combination at the back is smaller. The lever 5 is provided with an auxiliary tripping assembly abutting against the lock 7, which can push the lock 7 when the lever 5 is tripped and returns to its position, and the auxiliary lock 7 is tripped, which will not cause the situation where the force of the circuit breaker tripping at the back is smaller when the combination is used. The auxiliary tripping assembly includes an abutting block 18 of the lever 5 arranged at the combination tripping hole 702, and the abutting block 18 is arranged at the combination The abutment block 18 is above the combined tripping hole 702, and the abutment block 18 set on the lever 5 is abutted against the combined tripping hole 702. When the gate is closed, the lever 5 is reset so that the abutment block 18 gives the combined tripping hole 702 a downward force to assist the lock buckle 7 to cut off the power. When multiple circuit breakers are used in combination, the circuit breakers behind can be stably cut off. The lever 5 is provided with a fourth shaft body 23, and the lock buckle 7 is sleeved on the fourth shaft body 23 by setting a connecting hole 703. The lock buckle 7 can be rotatably set on the lever 5 through the fourth shaft body 23 and the connecting hole 703. The lever 5 and the lock buckle 7 are rotatably connected to the lever 5. The connection method is simple. The reset structure can be used to generate linkage with the lever 5, which is convenient for disconnecting and conducting the circuit breaker and makes the product more stable. The lever 5 is provided with a fifth shaft 24, and the jump buckle 6 is sleeved on the fifth shaft 24. The jump buckle 6 is provided with a protrusion 601, and the lock buckle 7 is provided with a second abutting groove 701 for the protrusion 601 to abut. The jump buckle 6 and the lock buckle 7 are abutted and linked. When the circuit breaker is short-circuited, the circuit breaker toggles the lock buckle 7, and the jump buckle 6 originally in the abutting state is separated from the lock buckle 7, and the jump buckle 6 is released, so that the lever 5 is disconnected. The rod 5 drives the connected moving contact 3 to disconnect from the static contact 2 to complete power failure. The first elastic member 9, the second elastic member 16, and the third elastic member 21 are all torsion springs. The first elastic member 9, the second elastic member 16, and the third elastic member 21 are torsion springs. The torsion spring can efficiently store energy when twisted and provide rotational power when released. This energy conversion efficiency is relatively high. At the same time, the torsion spring can provide a relatively precise torque and rotation angle relationship based on its design and manufacturing accuracy, which is very important for applications such as circuit breakers that require fine control of movement.

[0036] The beneficial effects of the utility model are as follows: the moving contact 3 and the lever 5 are fixedly connected through a linkage assembly, and the lever 5 is provided with a reset structure for prompting the lock 7 to reset, thereby separating the two functions of a spring structure used in the prior art, and the reset structure is independently arranged and will not be affected by the rotation force of the lock 7. At the same time, the reset force can be adjusted separately, and the auxiliary tripping assembly arranged on the lever 5 can also help the lock 7 to stably trip when needed.

Claims

1. A circuit breaker, comprising a housing, a moving contact, a stationary contact, and an operating mechanism for controlling the moving contact and the stationary contact to be on or off, wherein the operating mechanism comprises an operating handle, a lever, a trip button, a lock button, and a connecting rod, wherein the operating handle is linked to the lever through a connecting rod, the trip button is movably connected to the lever, and the trip button is linked to the lock button, characterized in that: The moving contact is linked to the lever by setting a linkage component, and a reset structure for prompting the lock to reset is provided between the lever and the lock.

2. A circuit breaker according to claim 1, characterized in that: The linkage assembly includes a first elastic member, a first shaft body is provided on the lever, the moving contact and the first elastic member are sleeved on the first shaft body, the lever is provided with a clamping block located at the first shaft body, the moving contact is provided with a clamping groove clamped with the clamping block, the lever is provided with a first abutting groove for abutment of the first elastic member, and the first elastic member is provided with a U-shaped connecting end at one end away from the lever, and the U-shaped connecting end is clamped with the moving contact.

3. A circuit breaker according to claim 2, characterized in that: The reset structure includes a second shaft body arranged on the lever and a second elastic member sleeved on the second shaft body, the shaft body is provided with a first clamping groove, one end of the second elastic member sleeved on the second shaft body is provided with a clamping end clamped with the first clamping groove, the lock buckle is provided with a second abutting groove, and the second elastic member abuts against the second abutting groove at one end away from the second shaft body so that the lock buckle can be reset and re-connected with the jump buckle through the elastic force of the second elastic member.

4. A circuit breaker according to claim 1, characterized in that: The shell is symmetrically provided with release windows on both sides, and the lock is provided with a combined release hole for external pins to be plugged in at the release windows.

5. A circuit breaker according to claim 4, characterized in that: The lever is provided with an auxiliary tripping assembly abutting against the lock catch.

6. A circuit breaker according to claim 5, characterized in that: The auxiliary trip assembly includes an abutment block with a lever disposed at the combined tripping hole, the abutment block is disposed above the combined tripping hole, the abutment block abuts against the combined tripping hole, and the lever is reset so that the abutment block applies a downward force to the combined tripping hole.

7. A circuit breaker according to claim 6, characterized in that: A groove is formed on the inner wall of the shell, a third shaft is provided on the side of the lever away from the lock, a third elastic member is sleeved on the third shaft, and an abutment pile is provided on the same side of the lever as the third shaft, one end of the third shaft abuts against the groove, and the end of the third shaft away from the inner wall abuts against the abutment column.

8. A circuit breaker according to claim 7, characterized in that: The lever is provided with a fourth shaft body, the lock buckle is sleeved on the fourth shaft body by setting a connecting hole, and the lock buckle is rotatably arranged on the lever through the fourth shaft body and the connecting hole.

9. A circuit breaker according to any one of claims 1 to 4, characterized in that: The lever is provided with a fifth shaft body, the jump buckle is sleeved on the fifth shaft body, the jump buckle is provided with a protrusion, and the lock buckle is provided with a third abutting groove for the protrusion to abut.

10. A circuit breaker according to any one of claims 2-3, characterized in that: The first elastic member, the second elastic member and the third elastic member are all torsion springs.

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