CN103500690B - A kind of energy storage device of circuit breaker - Google Patents

Abstract

The invention relates to a circuit breaker energy storage device, which relates to the technical field of circuit breakers. The device is installed in a circuit breaker housing, and it includes a driving part, a restricting part, a linking part and a tripping mechanism. One end of the linking part It is concentrically hinged with the round hole of the active part, and the other end is concentrically hinged with the jumper through hole in the tripping mechanism. The inclined surface of the card slot on the limiting part is in relative horizontal contact with the concave plane supported by the contact in the tripping mechanism, leaving a gap. The cylindrical boss is tangent to the circular notch on the positioning shaft; the tripping mechanism is mainly composed of a contact support, a lever, a jumper and a lock. The contact support and the lever move axially through the mechanism shaft, and the jumper and the lock Through the axial rotation of the two positioning shafts on the lever respectively, the shape of the upper cover plate corresponds to the lever, and is positioned with three holes, which are respectively fitted with the mechanism shaft, the positioning shaft on the lever and the mechanism shaft; the present invention has the advantages of simple structure, energy storage Large size, precise limit contact position, etc., significantly improve the life of the circuit breaker and short-circuit breaking capacity.

Description

A circuit breaker energy storage device

technical field

The invention relates to the technical field of circuit breakers, in particular to energy storage devices for circuit breakers.

Background technique

At present, miniature circuit breakers have overload and short-circuit protection functions. Overload passes through the inverse time-limit characteristic curve. When an overcurrent passes through, the heating element is heated and bent. The larger the overcurrent, the faster the heating element speed and the greater the bending degree, which will drive the trip. Mechanism snapping parts are disengaged, and the circuit breaker is opened. When short-circuit protection occurs, the instantaneous overcurrent is very large, and the electromagnetic system inside the circuit breaker passes through electromagnetic induction. The action of the electromagnetic tripper drives the release of the tripping mechanism, and the circuit breaker breaks the circuit.

The above circuit breaker closing operations are roughly divided into two categories: related manual operation and irrelevant manual operation. The relevant manual operation is an operation that relies entirely on the direct application of human power, so the speed and force of the operation depend on the operator's actions; the irrelevant manual operation is an energy storage operation in which energy is derived from human power and stored and released in a continuous operation, so the operation The speed and force are independent of the action of the operator. Most of the existing circuit breakers are operated by manpower. When the circuit breakers are closed, the pressure is small, and arcs are easy to occur, which greatly affects the service life of the circuit breakers, and there are safety hazards at the same time. Another part of the circuit breaker is a mechanism with energy storage operation, but some of these mechanisms are realized by using the interference movement between the parts and the mechanism components when the parts rotate. If it is reduced, it is easy to cause a breakdown phenomenon, and the contact pressure also decreases when the switch is closed, and the energy storage effect cannot be achieved. In order to achieve the energy storage effect, some mechanisms have more complicated structural design. When the active part gradually draws closer to the mechanism, the stopper is used to block the movement of the mechanism part at the preset stop point, and the stopper is pulled away when the active part moves to the release point. , to make the contacts contact quickly or use the pull rod to perform the force release conversion after pulling out before the action release point of the mechanism. This structure passes through the bottom of the mechanism, which easily affects the flexibility of the mechanism, or is affected by the mechanism itself. Not conducive to production, and the reliability is not high.

Contents of the invention

The object of the present invention is to provide an energy storage device for a circuit breaker to solve the above-mentioned technical problems that the energy storage mechanism has insufficient flexibility, is not conducive to production, and has low reliability.

In order to solve the above technical problems, the technical solution adopted by the present invention is: a circuit breaker energy storage device installed in the circuit breaker housing, which includes a driving part, a limiting part, a linkage part and a tripping mechanism for rotating movement, The active part is connected with the tripping mechanism through the linking part, and the tripping mechanism is connected with the restricting part. The through hole of the jumper is hinged concentrically, and the limiting member is in relative horizontal contact with the concave plane supported by the contact in the tripping mechanism through the slot slope and leaves a gap.

The limiting member is T-shaped, with a cylindrical boss at the active end, a plane guide arc at the other end, a bar in the middle on the rod, and a slot slope at the end of the bar.

The active part is connected to the base through the positioning and rotation of the positioning shaft, and the positioning shaft is provided with a rounded notch with a depth of 0.5-1.0 mm.

The restricting member is tangent to the rounded notch on the positioning shaft through the cylindrical boss thereon.

The tripping mechanism is mainly composed of a contact support, a lever, a jumper and a lock. The contact support is connected to the lever for axial rotation through the mechanism positioning shaft, and the jumper is connected to the lever through the through hole. The first positioning shaft of the lever is connected for axial rotation movement, and the lock catch is connected with the second positioning shaft on the lever for axial rotation movement through the through hole. A contact spring is provided above the contact support, and a fixed mechanism cover plate is provided above the contact spring. The shape of the cover plate corresponds to the lever, and the first positioning of the mechanism positioning shaft and the lever is respectively positioned through three holes. The shaft fits with the second positioning shaft.

The face of the contact spring installed on the contact support is upward, one end is arc-shaped, and a concave plane is provided on the arc-shaped surface, with a sliding notch on it, and the other end is provided with a fork-shaped groove for fixing the bonding parts .

The restricting part moves along the arc surface of one end supported by the contact through the inclined surface of the card slot, and is limited by the bar-shaped boss and the arc-shaped boss on the base of the housing, and the active part exerts force through the connecting part Push the jumper to rotate, and when the jumper is in contact with the occlusal surface of the lock, it will drive the tripping mechanism to rotate around the positioning axis of the mechanism.

A static contact is arranged on the contact support, and a contact is arranged on the static contact.

Compared with the prior art, the beneficial effects of the present invention are: the structural design of the energy storage device of the present invention is simple and reasonable, and since the movement of the contact support is restricted by the limiting member, the mechanism can still move freely, only the contact spring is stressed, When the release point is reached, the limiting function is released and the contacts are in instant contact. This device does not generate a large friction force, which greatly reduces the closing force of the circuit breaker, and can accurately limit the position. The synchronization is high, ensuring the limited distance between the contacts. , to ensure that the initial contact pressure of the contact is greater than the final pressure.

Description of drawings

Fig. 1 is a schematic diagram of the state structure of the energy storage device of the present invention installed in the circuit breaker housing;

Fig. 2 is a schematic diagram of the initial structure of the energy storage device of the present invention in the opening position in the circuit breaker;

Fig. 3 is a structural schematic diagram of the energy storage device of the present invention at the beginning of energy storage in the closing process in the circuit breaker;

Fig. 4 is a structural schematic diagram of the energy storage device of the present invention in the closing process of the circuit breaker at the end of energy storage;

Fig. 5 is a structural schematic diagram of the energy storage device of the present invention in a free trip state in a circuit breaker;

Fig. 6 is a structural schematic diagram of the limiting member of the energy storage device of the present invention;

Fig. 7 is a schematic structural view of the contact support of the energy storage device of the present invention;

In the picture,

1. Active part 2. Linkage part 3. Limiting part 4. Contact support

5. Jump button 6, lock button 7, cover plate 8, limit contact

9. Lever 10, static contact 11, contact 12, reaction force spring

13. Contact spring 14, mechanism positioning shaft 15, pull rod 16, tripping mechanism

17, positioning shaft 18, strip boss 19, arc boss 20, base.

110, round hole

310, cylindrical boss 320, card slot slope 330, guide arc surface

410. Concave plane

510, through hole

910, the first positioning axis 920, the second positioning axis

1710. Round Notch

Detailed ways

Combined with Fig. 1-Fig. 2, it is a schematic structural diagram of an embodiment of a circuit breaker energy storage device, which is installed in the circuit breaker housing, including the active part 1, the limiting part 3, the linkage part 2 and the tripping mechanism for rotating movement 16. The active part 1 is connected to the tripping mechanism 16 through the linking part 2, and the tripping mechanism 16 is connected to the restricting part 3. One end of the linking part 2 is hinged concentrically with the round hole 110 of the active part 1, and also It includes a spring 120, the other end of which is hinged concentrically with the through hole 510 of the jumper 5 in the tripping mechanism 16, and the limiting member 3 is opposite to the concave plane 410 of the contact support 4 in the tripping mechanism 16 through the slot slope 320 Horizontal contact with an appropriate gap; the limiting member 3 is T-shaped, and its active end is provided with a cylindrical boss 310, and the other end is a plane with a guide arc surface 330, and a strip-shaped platform is formed on the rod in the middle. The end of the strip table is provided with a slot slope 320; the active part 1 is connected to the base through the positioning and rotation of the positioning shaft 17, and the positioning shaft 17 is provided with a rounded notch 1710 with a depth of 0.5-1.0mm The limiting part 3 is tangent to the rounded notch 1710 on the positioning shaft 17 through the cylindrical boss 310 thereon; the tripping mechanism 16 is mainly supported by the contact 4, the lever 9, the jumper 5 and The lock 6 is composed of the contact support 4 through the mechanism positioning shaft 14 and the lever 9 for axial rotation, and the jumper 5 is connected with the first positioning shaft 910 on the lever 9 through the through hole 520 for axial rotation. The lock catch 6 is connected with the second positioning shaft 920 on the lever 9 through the through hole 610 for axial rotation movement, and the lock catch 6 is reset with a counter force spring 12. During the whole movement process of the mechanism Both apply force to the lock catch 6, and a rotatable pull rod 15 is provided in the hole of the lock catch 6, so that the jumper 5 and the lock catch 6 can be reliably closed, and the stability of the movement of the mechanism is enhanced; above the lever 9 and the contact support 4 Be provided with contact spring 13, the top of contact spring 13 is provided with fixing mechanism cover plate 7, and the shape of described cover plate 7 is corresponding with lever 9, and is respectively connected with mechanism positioning shaft 14, the first position of lever 9 by three hole positioning. The positioning shaft 910 and the second positioning shaft 920 fit together; the contact spring 13 installed on the contact support 4 faces upwards, and one end is arc-shaped, and a concave plane 410 is provided on the arc-shaped surface, and there is a sliding surface on it. The other end is provided with a fork-shaped groove for fixing the bonding parts; the limiting member 3 relies on its slot slope 320 to move along the arc track of one end of the contact support 4, and is controlled by the strip-shaped boss 18 on the housing base 20 and the arc-shaped boss 19 limit movement, the active part 1 pushes the jumper 5 to rotate through the linkage 2, and when it rotates until the jumper 5 contacts the occlusal surface of the lock 6, the tripping mechanism is driven 16 rotates around the mechanism shaft 14; the contact support 4 is provided with a static contact 10, and the static contact 10 is provided with a contact 11.

As shown in Figure 3, when the tripping mechanism 16 moves to the point where the concave plane 410 on the contact support 4 contacts with the draw-in slope 320 of the restriction member 3, the contact support 4 is stopped by the force of the restriction member 3 to realize storage. Can limit the distance between the contact 8 and the contact 11 on the contact 10, and the other parts of the tripping mechanism 16 will move when the active part 1 continues to move.

As shown in Figure 4, continue to move the active part 1, the stored energy increases, and when it moves to the release point, the active part 1 contacts the cylindrical boss 310 on the restricting part 3, and drives the restricting part 3 to move, making it engage in the slope of the slot 320 engages and disengages with the concave plane 410 of the contact support 4, and the mechanism closes instantly and quickly.

As shown in FIG. 5 , after the closing operation of the active part 1 starts, if the tripping mechanism 16 automatically opens the operation, even if the active part 1 maintains the closing command, its movable contact can return and remain in the open position.

Although the present invention has been described according to the above-mentioned specific embodiments, the inventive idea of the present invention is not limited to this invention, and any modification using the inventive idea will be included in the protection scope of the patent right.

Claims (4)

1. an energy storage device of circuit breaker, be arranged in Shell of circuit breaker, it comprises driving link (1), limited part (3), moving part (2) and the tripping mechanism (16) rotated, driving link (1) is connected with tripping mechanism (16) by moving part (2), tripping mechanism (16) is connected with limited part (3), it is characterized in that: one end of described moving part (2) is concentric hinged with the circular hole (110) of driving link (1), the other end is concentric hinged with the through hole (510) of the tripping (5) in tripping mechanism (16), described limited part (3) is contacted by draw-in groove inclined-plane (320) concave plane (410) relative level with the contact support (4) in tripping mechanism (16) and is left gap, described limited part (3) is T-shaped, its drive end is provided with column type boss (310), the other end is plane and establishes a curved guiding surface (330), and a bar shaped platform is played in centre on bar, and bar shaped platform end is provided with draw-in groove inclined-plane (320), described driving link (1) is connected with pedestal (20) by locating shaft (17) position rotating, and described locating shaft (17) is provided with fillet breach (1710), and its degree of depth is 0.5-1.0mm, described limited part (3) is tangent with the fillet breach (1710) on locating shaft (17) by the column type boss (310) on it, described tripping mechanism (16) is by contact support (4), lever (9), tripping (5) and snap close (6) composition, described contact support (4) by mechanism's locating shaft (14) with lever (9) to be connected as axial rotation motion, tripping (5) by through hole (520) with the first locating shaft (910) on lever (9) to be connected as axial rotation motion, snap close (6) by through hole (610) with the second locating shaft (920) on lever (9) to be connected as axial rotation motion, snap close (6) is resetted by reaction spring (12), touch spring (13) is provided with at lever (9) and the top of contact support (4), the top of touch spring (13) is provided with fixed mechanism cover plate (7), the shape of described cover plate (7) is corresponding with lever (9), by three location, holes respectively with the first locating shaft (910) and the second locating shaft (920) fit of mechanism's locating shaft (14), lever (9).

2. energy storage device of circuit breaker according to claim 1, it is characterized in that: described contact support (4) is installed touch spring (13) towards upper, one end is curved, arcwall face is provided with concave plane (410), with slip notch on it, the other end is provided with the fork groove of fixing bonding part.

3. energy storage device of circuit breaker according to claim 1, it is characterized in that: described limited part (3) makes orbiting motion by draw-in groove inclined-plane (320) along one end cambered surface of contact support (4), and by the bar shaped boss (18) on housing base (20) and arc boss (19) spacing movement, driving link (1) promotes tripping (5) by moving part (2) force and rotates, when rotation contacts to tripping (5) with snap close (6) occlusal surface, tripping mechanism (16) is driven to rotate around mechanism's locating shaft (14).

4. energy storage device of circuit breaker according to claim 1, is characterized in that: described contact support (4) arranges fixed contact (10), described fixed contact (10) is established a contact (11).