A split excitation trip system and a switch employing the same

Abstract

The application relates to a split-excitation tripping system and a switch adopting the same, which comprises a middle base, a large gear, a small gear, a pull rod, a connecting rod, a U-shaped rod, a jump buckle, a lock buckle, a tripper, and a moving contact. The large gear is arranged at the center of the middle base, the small gear, the pull rod, the connecting rod, the U-shaped rod, the jump buckle, the lock buckle and the tripper are sequentially arranged around the large gear, a large spring is connected to the large gear to pull the large gear to the surrounding direction, a moving contact spring is connected to the moving contact to push the moving contact to the inner side, and a small spring is connected to the jump buckle to pull the jump buckle to separate from the lock buckle. The tripping function is realized by the surrounding arrangement, the layout is reasonable, and the structure is simple and complete.

Description

Technical Field

[0001] This invention relates to a low-voltage electrical switch, and more particularly to a shunt trip system and a switch using the shunt trip system, belonging to the field of low-voltage electrical appliances. Background Technology

[0002] When a switch, especially a low-voltage electrical switch, breaks, an arc is formed between the moving contact and the stationary contact. The shorter the breaking time between the moving contact and the stationary contact, the faster the arc is extinguished. Therefore, in order to extinguish the arc quickly, the breaking speed between the moving contact and the stationary contact needs to be fast. The shunt trip system is a system designed to accelerate the breaking speed between the moving contact and the stationary contact. Summary of the Invention

[0003] In view of this, the object of the present invention is to provide a shunt trip system that enables rapid disconnection of the moving contact and the stationary contact, and a switch using the shunt trip system.

[0004] To achieve the above objectives, the present invention employs a shunt tripping system, comprising a central seat, a large gear, a small gear, a pull rod, a connecting rod, a U-shaped rod, a jump buckle, a locking buckle, a tripping device, and a moving contact. The centers of the large gear and the small gear are rotatably connected to the central seat, and the small gear meshes with the large gear. One end of the pull rod is hinged to the eccentric part of the small gear. One end of the connecting rod is connected to the pull rod, and the other end is connected to the jump buckle via the U-shaped rod. The moving contact is connected to the connecting rod. The locking buckle and the jump buckle are hinged between the central seat and the upper cover. The outer end of the locking buckle is connected to the tripping device, and the inner end abuts against the outer side of the jump buckle. The large gear is located at the center of the central seat. The small gear, pull rod, connecting rod, U-shaped rod, jump buckle, locking buckle, and tripping device are sequentially arranged around the large gear. A large spring is connected to the large gear to pull the large gear in the circumferential direction. A moving contact spring is connected to the moving contact to push the moving contact inward. A small spring is connected to the jump buckle to pull the jump buckle away from the locking buckle.

[0005] The present invention is further configured such that the large gear is provided with a rotating shaft, and the rotating shaft passes through the rotating shaft and is connected to the middle cover.

[0006] The present invention is further configured such that the connection hole between the connecting rod and the U-shaped rod is an elongated hole.

[0007] The present invention further provides that the rotating shaft is a square shaft with a square cross-section.

[0008] The beneficial effect of this invention is that the shunt trip unit achieves the tripping function through a surrounding arrangement, with a reasonable layout, simple and complete structure, and is suitable for various switches.

[0009] The present invention also includes a switch comprising a shunt trip system, stationary contacts, an upper cover, a smaller cover, a base, and a bottom plate. The upper cover covers the shunt trip system, and the smaller cover is disposed within the upper cover. The smaller cover has a shaft hole through which the rotating shaft of the shunt trip system passes. The rotating shaft is a square shaft with a square cross-section. The base is provided with multiple pairs of stationary contact mounting positions and moving contact moving slots. The moving contact of the shunt trip system includes a contact support and a contact bridge. Multiple contact bridges are disposed through the contact support. Each contact bridge has two ends corresponding to each pair of stationary contacts. An overtravel spring is disposed behind the contact bridge corresponding to the stationary contact. The moving contact spring is disposed above the contact support and connected to the middle seat of the shunt trip system. The bottom plate is fixed below the base.

[0010] The beneficial effect of this invention is that the shunt trip system adopts a single-layer housing, which can be easily installed on the switch to realize the tripping and opening function of the switch. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a specific embodiment 1 of the present invention.

[0012] Figure 2 This is a schematic diagram of a specific embodiment 1 of the present invention.

[0013] Figure 3 This is a schematic diagram of a specific embodiment 2 of the present invention.

[0014] Figure 4 This is an exploded view of specific embodiment 2 of the present invention. Detailed Implementation

[0015] like Figure 1 , Figure 2 and Figure 4As shown, a specific embodiment 1 of the present invention is a shunt tripping system for a switch, including a central seat 1, a rotating shaft 2, a large gear 3, a small gear 4, a pull rod 5, a connecting rod 6, a U-shaped rod 7, a trip latch 8, a locking latch 9, a tripping device 10, and a moving contact 11. A shaft hole is formed in the center of the central seat 1. The rotating shaft 2 passes through the center of the large gear 3 and is connected to the shaft hole in the central seat 1, hinged to the center of the central seat 1. A large spring 12 is connected to the large gear 3, pulling it counterclockwise. The small gear 4 is hinged to the central seat 1 below the large gear 3 and meshes with it. A pull rod shaft 41 is located at an eccentric position on the small gear 4. Due to the limitation of the rotation angle of the large gear 3, the rotatable range of the pull rod shaft 41 on the small gear 4 is a distance from the leftmost position of the small gear 4 in a counterclockwise direction to the rightmost position. The inner end of the pull rod 5 is hinged to the pull rod shaft 41, and the outer end of the pull rod 5 is connected to the connecting rod 6. The lower end is hinged, and the connecting rod 6 extends upward. A moving contact hole 61 is provided in the middle of the connecting rod 6. The moving contact 11 is hinged to the connecting rod 6 through the moving contact hole 61. The upper end of the connecting rod 6 is connected to the jump buckle 8 through a U-shaped rod 7 facing to the left. The connection hole between the connecting rod 6 and the U-shaped rod 7 is an elongated hole 62, which allows the U-shaped rod 7 to move within it. A moving contact groove 15 is provided on the right side of the middle seat 1, and the moving contact 11 is located at the lower edge of the moving contact groove 15. The contact groove 15 slides in a certain direction. The moving contact 11 is connected to a moving contact spring 13 that pushes the moving contact 11 to the left. The trip unit 10 is located on the left side of the middle seat 1. The trip unit 10 is connected to the outer end of the lock 9. The lock 9 and the jump buckle 8 are hinged on the middle seat 1. The jump buckle 8 forms a contact surface 81. The inner end of the lock 9 cooperates with the contact surface 81 of the jump buckle 8 to realize the locking and unlocking. The jump buckle 8 is connected to a small spring 14 that pulls the jump buckle 8 in a clockwise direction.

[0016] Figure 1 The diagram illustrates the closing state of Specific Embodiment 1. The large gear 3 drives the small gear 4 to rotate counterclockwise. The pull rod shaft 41 on the small gear 4 moves upward a certain distance after passing the leftmost position. The pull rod 5 moves to the left, pushing the connecting rod 6 to move to the left. The jump buckle 8 and the locking buckle 9 at the upper end of the connecting rod 6 are in a resisting state, so the upper end of the connecting rod 6 cannot move. Therefore, the lower end moves to the left, causing the moving contact 11 connected to the connecting rod 6 to also move to the left to the closing position. At this time, due to the pulling force of the large spring 12 and the moving contact spring 13, the small gear 4 is in a balanced state, thus keeping the moving contact 11 in the closing state.

[0017] Figure 2The diagram illustrates the tripping state in Specific Embodiment 1. When the trip unit 10 trips, the latch 9 disengages from the trip latch 8. Under the tension of the moving contact spring 13, the trip latch 8 causes the upper end of the connecting rod 6 to move to the left. At this time, the lower end of the connecting rod 6 cannot apply pressure to the pull rod shaft 41 through the pull rod 5. Under the tension of the large spring 12, the small gear 4 rotates clockwise, causing the moving contact 11 to quickly trip, thus achieving rapid tripping. After the moving contact 11 trips and returns to its original position, the trip latch 8 returns to the position of contact with the latch 9 under the action of the small spring 14.

[0018] For ease of explanation of the specific embodiments, the descriptions of direction and position in the above specific embodiment 1, such as top, bottom, left, right, counterclockwise, clockwise, etc., are all based on the provided instruction manual. Figure 1 and attached Figure 2 The placement position is the standard. If the placement direction is changed, the above description of the direction and position should also be changed accordingly. The purpose is to illustrate the layout of the embodiment with the center of the seat, and the small gear, pull rod, connecting rod, U-shaped rod, jump buckle, lock buckle and release device arranged in sequence around the large gear.

[0019] like Figure 3 , Figure 4 As shown, a specific embodiment 2 of the present invention is a switch using the specific embodiment 1, including a shunt trip system 01, a stationary contact 06, an upper cover 02, a small cover 03, a base 04, and a bottom plate 05. The upper cover 02 covers the shunt trip system 01, and the small cover 03 is disposed in the upper cover 02. The small cover 03 has a shaft hole 031 formed on it for the rotating shaft 2 of the shunt trip system 01 to pass through. The rotating shaft 2 is a square shaft with a square cross-section. The base 04 is provided with multiple pairs of stationary contact mounting positions 041 and moving contact moving grooves 042. The contact 06 is located in the stationary contact mounting position 041. The moving contact 11 of the shunt trip system 01 includes a contact support 111 and a contact bridge 112. Multiple contact bridges 112 are arranged through the contact support 111. Each pair of stationary contacts 06 is provided at both ends of each contact bridge 112. An overtravel spring 113 is provided behind the contact bridge 112 corresponding to the stationary contact 06. The moving contact spring 13 is located above the contact support 111 and connected to the middle seat 1 of the shunt trip system 01. The base plate 05 is fixed below the base 04.

Claims

1. A shunt trip system, comprising a central seat, a large gear, a small gear, a pull rod, a connecting rod, a U-shaped rod, a trip latch, a locking latch, a trip unit, and a moving contact; the large gear and the small gear are rotatably connected to the central seat; the small gear meshes with the large gear; one end of the pull rod is hinged to the eccentric part of the small gear; one end of the connecting rod is connected to the pull rod, and the other end is connected to the trip latch via the U-shaped rod; the moving contact is connected to the connecting rod; the locking latch and the trip latch are hinged between the central seat and the upper cover; the outer end of the locking latch is connected to the trip unit, and the inner end abuts against the outer side of the trip latch; characterized in that: The large gear is located at the center of the middle seat. The small gear, pull rod, connecting rod, U-shaped rod, jump buckle, lock buckle, and release device are arranged around the large gear in sequence. A large spring is connected to the large gear to pull the large gear in the circumferential direction. A moving contact spring is connected to the moving contact to push the moving contact inward. A small spring is connected to the jump buckle to pull the jump buckle away from the lock buckle.

2. The shunt trip system according to claim 1, characterized in that: The large gear is equipped with a rotating shaft, which passes through the center of the large gear and is connected to the shaft hole of the middle seat.

3. The shunt trip system according to claim 1 or 2, characterized in that: The connection hole between the connecting rod and the U-shaped rod is an elongated oval hole.

4. The shunt trip system according to claim 2, characterized in that: The rotating shaft is a square shaft with a square cross-section.

5. A switch, characterized in that: The switch includes a shunt trip system as described in any one of claims 1-4, a stationary contact, a top cover, a small cover, a base, and a bottom plate. The top cover covers the shunt trip system, and the small cover is disposed in the top cover. A shaft hole is formed on the small cover for the rotating shaft of the shunt trip system to pass through. The rotating shaft is a square shaft with a square cross-section. The base is provided with multiple pairs of stationary contact mounting positions and moving contact moving slots. The moving contact of the shunt trip system includes a contact support and a contact bridge. Multiple contact bridges are disposed through the contact support. Each contact bridge is provided at both ends corresponding to each pair of stationary contacts. An overtravel spring is provided behind the contact bridge corresponding to the stationary contact. The moving contact spring is disposed above the contact support and connected to the middle seat of the shunt trip system. The bottom plate is fixed below the base.

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