CN211529895U - Electric operating mechanism of circuit breaker - Google Patents

Abstract

The utility model relates to a circuit breaker electric operating mechanism, which belongs to the technical field of low-voltage circuit breakers; comprises a shell, a motor, a worm, a multi-stage gear set and a handle; the shell is internally provided with a motor serving as a driving source and used for outputting closing or opening torque, one end of the motor is connected with a worm, the worm and the multi-stage gear set form a gear transmission system, and then a handle is driven to rotate, so that electric closing or opening of the circuit breaker is realized. The utility model discloses under the prerequisite that accords with little volume, having avoidd the negative problem of current electric operating mechanism form, improved the component atress condition, can guarantee the safe and reliable operation, improved the life of mechanism again, adapt to automated production's needs, and manufacturing cost is lower, possesses more environmental suitability.

Description

Electric operating mechanism of circuit breaker

Technical Field

The utility model relates to a circuit breaker electric operating mechanism belongs to low-voltage circuit breaker technical field.

Background

Circuit breakers have found widespread use throughout power distribution systems as an important ring of power distribution protection. In the current application scenario, most circuit breakers rely on manual operation to open and close the circuit breaker. However, with the development and progress of the times, in many applications, for example, in power utilization places which are difficult to reach by maintenance personnel, unattended and have high requirements on the continuity of power supply, the electric operating mechanism is required to be used for automatically and remotely switching on and off the circuit breaker.

Disclosure of Invention

The utility model aims at solving the technical problem of adopting electric operating mechanism to come from automatic long-range deciliter circuit breaker.

In order to solve the above problems, the present invention provides an electric operating mechanism for a circuit breaker, which comprises a housing, a motor, a worm, a multi-stage gear set, and a handle; the shell is internally provided with a motor, a worm and a multi-stage gear set, the motor is connected with the multi-stage gear set through the worm, and a handle is arranged above the multi-stage gear set; a handle rotating shaft is arranged on the shell, and a rotating shaft hole corresponding to the handle rotating shaft is arranged in the middle of the handle; one end of the handle is arranged above the multi-stage gear set in a spanning mode, and the other end of the handle is arranged on the outer side of the shell.

Preferably, the multistage gear set comprises a primary gear set, a secondary gear set, an intermediate gear and a toggle gear; the primary gear set comprises a worm gear and a primary driving gear, the worm gear and the primary driving gear are sleeved on the same shaft, and the diameter of a reference circle of the worm gear is larger than that of a reference circle of the primary driving gear; the secondary gear set comprises a secondary driven gear and a secondary driving gear, the secondary driven gear and the secondary driving gear are sleeved on the same shaft, and the diameter of a reference circle of the secondary driven gear is larger than that of the reference circle of the secondary driving gear; the worm is meshed with the worm gear, the first-stage driving gear is meshed with the second-stage driven gear, the second-stage driving gear is meshed with the intermediate gear, and the intermediate gear is meshed with the shifting gear.

Preferably, the toggle gear is provided with a toggle rod.

Preferably, the toggle gear is provided with a toggle rod, and the toggle rod is arranged on the two sides of the surface of the toggle gear in a penetrating way.

Preferably, the handle comprises an operating end, a toggle groove, a gear groove and a handle linkage rod; the handle rotates around the handle rotating shaft, one end of the handle is provided with an operating end, and the operating end is arranged on the outer side of the shell and connected with the handle of the circuit breaker; the other end of the handle is provided with two parallel shifting grooves and a gear groove, and the shifting grooves and the gear groove are arranged in a cross manner; the gear groove is arranged above the toggle gear, and the toggle groove is arranged on two sides of the toggle gear; one end of the handle linkage rod is fixedly connected to the handle, and the other end of the handle linkage rod is arranged on the outer side of the shell.

Preferably, the shell is provided with a trip rod rotating shaft, and the trip rod rotating shaft is provided with a trip rod; the tripping rod is in contact connection with the part of the tripping linkage rod arranged on the circuit breaker, which is arranged in the shell.

1. The utility model utilizes the grooved pulley to drive the handle to rotate positively and negatively to realize opening and closing;

2. after the switching on and off of the utility model is completed, the execution characteristics of the last gear are separated from the handle groove, and the manual switching off is not influenced;

3. after the utility model is closed, when the brake is automatically opened under normal conditions, the tail gear can be reversed, the execution characteristics on the tail gear are contacted with the handle groove, and the handle is pushed to be reversed;

4. the utility model discloses after the combined floodgate was accomplished, when needing the automatic separating brake under the quick isolation condition, accessible final pole gear corotation, the trip bar contact of the executive characteristic on it and circuit breaker body makes circuit breaker mechanism unbuckle and realizes, realizes quick separating brake.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses under the prerequisite that accords with little volume, having avoidd the negative problem of current electric operating mechanism form, improved the component atress condition, improve the operating life of mechanism, make it possess more environmental suitability.

1. The utility model discloses compromise handle separating brake and two kinds of forms of automatic tripping of mechanism on the separating brake mode, can guarantee safety, can greatly prolong the comprehensive mechanical life of product again.

2. The utility model discloses mechanism's spare part is constituteed less but the essence, adapts to automated production's needs, and manufacturing cost is lower.

3. The utility model discloses a multistage gear and handle groove contact, the reliability is high (the lifting surface area is big), and the component is stand wear and tear, and the performance is excellent, and mechanical parts life cycle is long and reliable, can strengthen its environmental suitability.

4. The utility model discloses a novel structural design make the customer can freely switch mode of operation (automatic, manual), possess more environmental suitability.

Drawings

FIG. 1 is a schematic side view of an electric operating mechanism of the present invention;

fig. 2 is another schematic view of the electric operating mechanism of the present invention (without the housing);

FIG. 3 is another schematic view of the electric operating mechanism of the present invention (including the housing);

fig. 4 is a schematic structural view of an operating handle of the electric operating mechanism of the present invention;

FIG. 5 shows the initial position of the electric operating mechanism of the present invention;

the arrow direction on the handle is the closing direction.

Fig. 6a shows a first switching process of the electric operating mechanism of the present invention;

and when the switch is switched on, the matching characteristic on the gear just contacts with the handle groove.

Fig. 6b shows a second switching process of the electric operating mechanism of the present invention;

when the handle is pushed to the neutral position.

Fig. 6c shows a third switching process of the electric operating mechanism of the present invention;

and when the closing is completed, the matching characteristic on the gear is about to be separated from the handle groove.

Fig. 6d shows a fourth switching process of the electric operating mechanism of the present invention;

in the rest position, the mating features on the gear are completely disengaged from the handle slot.

FIG. 7 shows the manual emergency opening of the electric operating mechanism;

the handle is directly pulled to the reset position by the hand.

Fig. 8a shows a first process of the electric operating mechanism for rapidly opening the brake;

mating features on the gear contact the circuit breaker trip bar.

Fig. 8b shows a second process of rapid opening of the electric operating mechanism of the present invention;

the breaker is unbuckled to drive the handle to reset.

Fig. 9 shows the flow chart of the state transition of the electric operating mechanism

Detailed Description

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings:

as shown in fig. 1-9, the present invention provides an electric operating mechanism for a circuit breaker, comprising a housing 110, a motor 107, a worm 106, a multi-stage gear set, and a handle 101; a motor 107, a worm 106 and a multi-stage gear set are arranged in the shell 110, the motor 107 outputs switching-on or switching-off torque and is connected with the multi-stage gear set through the worm 106, and a handle 101 is arranged above the multi-stage gear set; a rotating shaft 101e of the handle 101 is arranged on the shell 110, and a rotating shaft hole corresponding to the handle rotating shaft 101e is arranged in the middle of the handle 101; one end of the handle 101 is arranged above the multi-stage gear set in a straddling manner, and the other end is arranged outside the shell 110. The multi-stage gear set comprises a primary gear set 105, a secondary gear set 104, an intermediate gear 103 and a toggle gear 102; the primary gear set 105 comprises a worm wheel 105a and a primary driving gear 105b, the worm wheel 105a and the primary driving gear 105b are sleeved on the same shaft, and the diameter of the reference circle of the worm wheel 105a is larger than that of the reference circle of the primary driving gear 105 b; the secondary gear set 104 comprises a secondary driven gear 104b and a secondary driving gear 104a, the secondary driven gear 104b and the secondary driving gear 104a are sleeved on the same shaft, and the diameter of the reference circle of the secondary driven gear 104b is larger than that of the reference circle of the secondary driving gear 104 a; the worm 106 is in gear engagement with a worm wheel 105a, a first-stage driving gear 105b is in gear engagement with a second-stage driven gear 104b, a second-stage driving gear 104a is in gear engagement with an intermediate gear 103, and the intermediate gear is in gear engagement with the toggle gear 102. The toggle gear 102 is provided with a toggle rod 102a, and the toggle rod 102a penetrates through the toggle gear 102 and is disposed on two sides of the gear surface of the toggle gear 102. The dial gear 102 has a dial rod 102a for pushing the handle to rotate clockwise or counterclockwise. The handle 101 comprises an operating end 101a, a toggle groove 101b, a gear groove 101c and a handle linkage rod 101 d; the handle 101 rotates around a handle rotating shaft 101e, one end of the handle 101 is provided with an operating end 101a, and the operating end 101a is arranged on the outer side of the shell 110 and connected with the handle of the circuit breaker, so that the manual opening and closing of the circuit breaker can be manually operated; the other end of the handle 101 is provided with two parallel toggle grooves 101b and a gear groove 101c, and the toggle grooves 101b and the gear groove 101c are arranged in a crossed manner; the gear groove 101c is arranged above the toggle gear 102, and the two toggle grooves 101b are respectively arranged at two sides of the toggle gear 102; the gear slot 101c may receive a portion of the toggle gear 102 such that the toggle gear 102 may rotate.

One end of the handle linkage rod 101d is fixedly connected to the handle 101, and the other end is arranged outside the shell 110. A trip rod rotating shaft is arranged on the shell 110, and a trip rod 108 is arranged on the trip rod rotating shaft; the trip bar 108 is in contact connection with the portion of the circuit breaker trip link 109 that extends through the housing 110 and into the housing.

The toggle gear 102 is provided with a toggle rod 102a, and the toggle rod 102a enters the toggle groove 101b through the rotation of the toggle gear 102 to push the handle 101 to rotate, so that the electric switching-on or switching-off of the circuit breaker is realized; the toggle rod 102a can be separated from the toggle groove 101b through the rotation of the toggle gear 102, so that the circuit breaker can be manually switched on and switched off by manually pushing the operating handle 101; in addition, after the poke rod 102a leaves the poke groove 101b, if rapid opening is needed, a torque can be output through the motor 107, so that the poke rod 102a pushes the trip rod 108, and the trip linkage rod 109 is pushed to drive the trip mechanism of the circuit breaker, so that the circuit breaker is tripped and opened.

The trip bar 108 is rotatably mounted to the housing 110 by a shaft. The trip link 109 can be a feature that extends from the circuit breaker and engages the circuit breaker's trip mechanism, such trip link 109 features being common devices for circuit breakers.

In order to enable the poke rod 102a to exert operating force on the handle 101 in a balanced manner, after the poke rod 102a is inserted into the poke gear 102, the poke rod 102a is distributed on two sides of the poke gear 102, so that the poke grooves 101b on two sides of the poke gear 102 can be pushed simultaneously, and electric switching-on and switching-off force can be output in a more balanced manner.

The operation principle and process of the electric operating mechanism of the present invention are further described below with reference to fig. 5 to 8 b:

according to fig. 5-6 d, the utility model discloses an electronic combined floodgate process as follows:

the circuit breaker is in the open position, as shown in fig. 5. When the electric operating mechanism receives a closing instruction, the electric motor 107 is electrified to rotate in the forward direction, the worm wheel 105a of the primary gear set 105 rotates clockwise through the worm and gear meshing structure, the toggle gear 102 rotates counterclockwise through the transmission of the secondary gear set 104 and the intermediate gear 103, and the toggle rod 102a gradually approaches to the toggle groove 101b of the handle 101 from the initial position (as shown in fig. 5). As the motor 107 continues to rotate, the tap lever 102a enters the slot of the tap 101b (fig. 6a) and pushes the handle 101 to rotate clockwise, after a certain angle (fig. 6b, 6c), so that the handle 101 reaches the closing position (fig. 6c) and is maintained. At this time, the motor 107 is still powered and continues to rotate until the tap lever 102a is out of the tap groove 101b (see fig. 6d), and reaches the stop position, and the motor 107 is powered off and stops rotating. In the rest position of the state of fig. 6d, the tap lever 102a is located in a position that does not interfere with the rotation of the handle between closing and opening. The sequence of the change in fig. 5- > fig. 6a- > fig. 6b- > fig. 6c- > fig. 6d shows the sequence of the closing operation of the electric operating mechanism.

If the electric automatic brake-separating process is to be implemented, the reverse process of the automatic brake-closing process is the sequential change process of fig. 6d- >6c- >6b- >6a- > 5. In the initial state as shown in fig. 6d, when the electric operating mechanism receives a brake-off command, the electric motor 107 is powered on to rotate in the reverse direction, so as to drive the worm wheel 105a of the primary gear set 105 to rotate counterclockwise, and the toggle gear 102 rotates clockwise through the transmission of the secondary gear set 104 and the intermediate gear 103, so that the toggle rod 102a gradually approaches the handle 101 and enters the toggle groove 101b, pushes the handle to rotate counterclockwise, and sequentially passes through the states shown in fig. 6c and 6b, and reaches a brake-off position, that is, the state shown in fig. 6 a. At this time, the motor 107 is still powered to continue rotating until the tap lever 102a is disengaged from the tap groove 101b, and the initial position of fig. 5 is reached, and the motor 107 is powered off and stops rotating.

As shown in fig. 5, the poke rod 102a is in the initial position, and the circuit breaker is switched between the closing and opening by manually poking the operation end 101a of the handle 101. When the tap lever 102a is at the initial position and the circuit breaker is in the closing state, the motor 107 does not receive a closing command to rotate by the position state interlock, so that the tap gear 102 does not rotate counterclockwise to interfere with the movement of the handle 101.

As shown in fig. 7, the tap lever 102a is in the closing stop position and does not contact the trip lever 108, and the circuit breaker is switched between closing and opening by manually tapping the operating end 101a of the handle 101. When the poke rod 102a is at the closing stop position and the circuit breaker is in the opening state, the handle 101 is at the position shown in fig. 6d, and the position state is interlocked, the motor 107 does not receive the opening command and rotates reversely, so that the poke gear 102 does not rotate clockwise to interfere with the movement of the handle 101. It is noted that in this state position, the motor 107 may receive a command to rotate in a forward direction, thereby causing the toggle gear 102 to rotate counterclockwise. Such as an automatic fast opening command.

According to fig. 8a, 8b and 5, the operation process of the rapid opening is explained:

when the electric operating mechanism is in the state shown in fig. 6d, that is, the poke rod 102a is in the closing stop position, and the handle 101 is in the closing position, at this time, the motor 107 can receive a rapid opening command, and after being powered on, the motor rotates in the forward direction, the worm wheel 105a of the first-stage gear set 105 rotates clockwise, and the poke gear 102 rotates counterclockwise through the transmission of the second-stage gear set 104 and the intermediate gear 103, and the poke rod 102a drives the trip rod 108 to rotate around the rotating shaft of the trip rod to push the trip linkage rod 109, so as to trigger the trip mechanism of the circuit breaker. Then, the toggle gear 102 continues to rotate until the toggle rod 102a reaches the initial position, and the motor is powered off and stops.

Of course, if the tap lever 102a is at the stop position, but the handle 101 is at the opening position, a reset command can also be sent to the electric operating mechanism, at this time, the electric motor 107 is powered to rotate in the forward direction, and the tap gear 102 is rotated counterclockwise through gear transmission, so that the tap lever 102a reaches the initial position. This process can be used for testing the electric operating mechanism itself, such as whether the electric operating mechanism is operating reliably, whether the mechanical part is normal, whether the control and detection is normal, and the like.

As shown in fig. 9, the transition of the respective position states according to the present invention will be further described:

when the tap lever 102a is in the initial position and the handle is in the brake-off position, the first mode: the tap lever 102a reaches the stop position and the handle reaches the on position by the forward rotation of the motor 107; the second method comprises the following steps: the handle 101 is manually operated to switch between the open and closed positions, but the tap lever 102a is still in the initial position.

When the tap lever 102a is at the stop position and the handle is at the switch-on position, the first method: the poke rod 102a reaches the initial position and the handle reaches the brake opening position by the reverse rotation of the motor 107; the second method comprises the following steps: the handle 101 is manually operated to switch between the opening position and the closing position, but the poke rod 102a is still at the stop position; the third method comprises the following steps: when the motor 107 is rotated in the forward direction, the tap lever 102a reaches the trip lever operating position, the handle 101 reaches the trip position, and the motor 107 is continuously rotated in the forward direction to bring the tap lever 102a to the initial position.

When the tap lever 102a is at the initial position and the lever is at the on position, the output motion of the motor 107 is inhibited when there is a handle malfunction through the electric control interlock and the position detection, preventing the tap lever 102a from moving to the stop position and the lever from malfunctioning to the off position, and vice versa. Thus, the two states are prohibited from being switched to each other.

When the tap lever 102a is at the initial position and the lever is held at the switch-on position, the normal rotation of the motor 107 is inhibited by the position detection and the electrical control, and the operation interference between the tap lever 102a and the lever 101 is prevented.

When the tap lever 102a is at the stop position and the handle is held at the opening position, the reverse rotation of the motor 107 is inhibited by the position detection and the electrical control, and the tap lever 102a and the handle 101 are prevented from being operated and interfered with each other.

The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the present invention in any way and in any way, and it should be understood that modifications and additions may be made by those skilled in the art without departing from the scope of the present invention. Those skilled in the art can make various changes, modifications and evolutions equivalent to those made by the above-disclosed technical content without departing from the spirit and scope of the present invention, and all such changes, modifications and evolutions are equivalent embodiments of the present invention; meanwhile, any changes, modifications and evolutions of equivalent changes to the above embodiments according to the actual technology of the present invention are also within the scope of the technical solution of the present invention.

Claims (6)

1. An electric operating mechanism of a circuit breaker is characterized in that: comprises a shell (110), a motor (107), a worm (106), a multi-stage gear set and a handle (101); an electric motor (107), a worm (106) and a multi-stage gear set are arranged in the shell (110), the electric motor (107) is connected with the multi-stage gear set through the worm (106), and a handle (101) is arranged above the multi-stage gear set; a rotating shaft of the handle (101) is arranged on the shell (110), and a rotating shaft hole corresponding to the rotating shaft of the handle is arranged in the middle of the handle (101); one end of the handle (101) is arranged above the multi-stage gear set in a spanning mode, and the other end of the handle is arranged on the outer side of the shell (110).

2. An electric operating mechanism for a circuit breaker according to claim 1, wherein: the multi-stage gear set comprises a primary gear set (105), a secondary gear set (104), an intermediate gear (103) and a toggle gear (102); the primary gear set (105) comprises a worm wheel (105a) and a primary driving gear (105b), the worm wheel (105a) and the primary driving gear (105b) are sleeved on the same shaft, and the diameter of a reference circle of the worm wheel (105a) is larger than that of the reference circle of the primary driving gear (105 b); the secondary gear set (104) comprises a secondary driven gear (104b) and a secondary driving gear (104a), the secondary driven gear (104b) and the secondary driving gear (104a) are sleeved on the same shaft, and the diameter of the reference circle of the secondary driven gear (104b) is larger than that of the reference circle of the secondary driving gear (104 a); the worm (106) is in gear meshing connection with the worm wheel (105a), the first-stage driving gear (105b) is in gear meshing connection with the second-stage driven gear (104b), the second-stage driving gear (104a) is in gear meshing connection with the intermediate gear (103), and the intermediate gear is in gear meshing connection with the toggle gear (102).

3. An electric operating mechanism for a circuit breaker according to claim 2, wherein: the toggle gear (102) is provided with a toggle rod (102 a).

4. An electric operating mechanism for a circuit breaker according to claim 3, wherein: the poke rod (102a) is arranged on the two sides of the gear surface of the poke gear (102) in a penetrating way through the poke gear (102).

5. An electric operating mechanism for a circuit breaker according to claim 4, wherein: the handle (101) comprises an operation end (101a), a toggle groove (101b), a gear groove (101c) and a handle linkage rod (101 d); the handle (101) rotates around the handle rotating shaft, one end of the handle (101) is provided with an operating end (101a), and the operating end (101a) is arranged on the outer side of the shell (110) and connected with the handle of the circuit breaker; the other end of the handle (101) is provided with two parallel shifting grooves (101b) and a gear groove (101c), and the shifting grooves (101b) and the gear groove (101c) are arranged in a cross manner; the gear groove (101c) is arranged above the toggle gear (102), and the toggle groove (101b) is arranged at two sides of the toggle gear (102); one end of the handle linkage rod (101d) is fixedly connected to the handle (101), and the other end of the handle linkage rod is arranged on the outer side of the shell (110).

6. An electric operating mechanism for a circuit breaker according to claim 5 wherein: a tripping rod rotating shaft is arranged on the shell (110), and a tripping rod (108) is arranged on the tripping rod rotating shaft; the tripping rod (108) is in contact connection with a part of a tripping linkage rod (109) arranged on the circuit breaker and arranged in the shell (110).

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