Energy-storage quick-acting circuit breaker

Abstract

The utility model provides an energy storage quick-acting circuit breaker, comprising a contact mechanism comprising a static contact and a moving contact assembly rotatably installed in a housing; the operating mechanism comprises a knob, a link rod and a rotating wheel, the knob drives the rotating wheel to rotate through the link rod, and a first elastic piece is arranged between the rotating wheel and the moving contact assembly; the energy storage mechanism comprises a first locking piece and a second elastic piece, the first locking piece is installed on the shell in a translation mode and is provided with a locking position matched with the moving contact assembly for locking and an unlocking position driven by the rotary knob and separated from the moving contact assembly, and the second elastic piece exerts elastic acting force translating towards the direction of the locking position towards the first locking piece. Compared with the prior art, the driving force for connecting the moving contact and the static contact is generated by the action of the energy storage mechanism in the circuit breaker, so that the ablation or fusion welding phenomenon of the contacts due to high temperature caused by the condition that the contacts are connected or disconnected due to human factors is avoided, and the service life of the circuit breaker is prolonged.

Description

Technical Field

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

[0002] A circuit breaker is a low-voltage protective device used in power distribution systems to connect or interrupt load lines. It has both a manual switch function and the ability to automatically perform overload, short circuit, and leakage protection.

[0003] The circuit breaker includes an operating mechanism and a contact mechanism. The contact mechanism includes a relatively arranged moving contact and a stationary contact. The operating mechanism is used to drive the moving contact to make contact with the stationary contact or to separate and disconnect. At present, there are uncontrollable factors in the manual closing process. The speed of closing is completely affected by human factors. For example, if the human hand closes the circuit at a slow speed, the moving and stationary contacts will contact at a slow speed, resulting in a phenomenon of seeming to be connected but not connected. There is a risk of contact ablation or even welding, which shortens the service life of the circuit breaker. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defect in the prior art that arc erosion of contacts is easily generated when the circuit breaker is closed, thereby providing a circuit breaker with long service life and fast energy storage.

[0005] To this end, the utility model provides a circuit breaker with energy storage and fast action, including a contact mechanism, an operating mechanism and an energy storage mechanism, the contact mechanism including a static contact and a moving contact assembly rotatably installed in a housing; the operating mechanism including a knob, a connecting rod and a rotating wheel, the knob drives the rotating wheel to rotate through the connecting rod, and a first elastic member is provided between the rotating wheel and the moving contact assembly; the energy storage mechanism includes a first locking member and a second elastic member, the first locking member can be translationally installed on the housing, and has a locking position for locking with the moving contact assembly, and an unlocking position driven by the knob and separated from the moving contact assembly ... The second elastic member applies an elastic force toward the first locking member to translate in the direction of the locking position; during the closing process, the moving contact assembly has a first state in which it is linked with the rotating wheel and rotates toward the static contact, a second state in which it is locked with the first locking member and maintains a constant distance with the static contact, and a third state in which it is in contact and connected with the static contact after being unlocked from the first locking member, wherein when the moving contact assembly is in the second state, the rotating wheel rotates relative to the moving contact assembly, and the first elastic member stores energy; after the moving contact assembly is unlocked from the first locking member, the first elastic member releases energy.

[0006] The moving contact assembly has moving contacts and limit blocks respectively arranged at two ends thereof, and one end of the first locking member adjacent to the moving contact assembly is provided with a stopper which can abut against the limit block.

[0007] The knob has a protrusion which abuts against the first locking member and drives the first locking member to translate toward the unlocking position.

[0008] The first locking member has a first contact surface adjacent to the knob, and the knob has a second contact surface arranged corresponding to the first contact surface, wherein when the first locking member is in the locking position, the first contact surface abuts against the second contact surface.

[0009] The housing is formed with a sliding groove for the first locking member to slide.

[0010] The first elastic member is a tension spring, and the rotating wheel drives the moving contact assembly to rotate through the tension spring.

[0011] The operating mechanism also includes a jump buckle and a third elastic member, one end of the third elastic member is against the jump buckle, and the other end is against the rotating wheel. A locking opening for inserting the end of the connecting rod is formed between the jump buckle and the rotating wheel under the elastic force of the third elastic member.

[0012] The trip button, the rotating wheel and the moving contact assembly all rotate around the same first rotating shaft.

[0013] The technical solution of the utility model has the following advantages:

[0014] 1. The energy storage and fast-acting circuit breaker provided by the utility model is provided with an energy storage mechanism, which includes a first locking member and a second elastic member. The first locking member can be installed on the housing in a translational manner, and has a locking position that cooperates with the moving contact assembly to lock, and an unlocking position that is driven by a knob and separated from the moving contact assembly; when closing the circuit, the knob drives the rotating wheel and the moving contact assembly to rotate through a connecting rod until the moving contact assembly is locked by the first locking member, and the position of the moving contact remains stationary, while the rotating wheel continues to rotate relative to the moving contact assembly under the drive of the knob, and the first elastic member accumulates energy. When the knob rotates to the position that drives the first locking member to separate from the moving contact assembly, the first elastic member releases energy, thereby quickly driving the moving contact assembly to contact and connect with the static contact. Compared with the prior art, the driving force for the connection of the moving and static contacts is generated by the action of the energy storage mechanism itself inside the circuit breaker, which avoids the situation that the contacts are seemingly connected but not connected due to human factors, resulting in the contact being ablated or welded due to high temperature, thereby improving the service life of the circuit breaker.

[0015] 2. The utility model provides a fast-acting energy storage circuit breaker, in which the knob has a protrusion that abuts against the first locking member and drives it to translate toward the unlocking position. In the initial state of closing the switch, the protrusion of the knob and the locking member are at a certain distance. When the knob is rotated by a certain angle, the protrusion abuts against the locking member and drives the locking member to translate toward the unlocking position, so that the stopper of the locking member is separated from the limit block of the moving contact assembly. The setting of the above-mentioned protrusion has the advantage of simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the energy storage fast-acting circuit breaker of the utility model in the open state;

[0018] Figure 2 It is a structural schematic diagram of the operating mechanism and the energy storage mechanism (the circuit breaker is in the open state);

[0019] Figure 3 It is a structural schematic diagram of the operating mechanism and the energy storage mechanism (the first locking member is in the locking position);

[0020] Figure 4 It is a structural schematic diagram of the operating mechanism and the energy storage mechanism (the first locking member is in the unlocked position and the circuit breaker is closed);

[0021] Figure 5 It is a schematic diagram of the assembly of the rotating wheel, the trip button and the moving contact frame;

[0022] Figure 6 Schematic diagram of the explosion structure of the operating mechanism and energy storage mechanism.

[0023] Explanation of the accompanying drawings: 1. Shell; 2. Static contact; 3. Moving contact assembly; 4. Knob; 5. Connecting rod; 6. Rotating wheel; 7. First elastic member; 8. First locking member; 9. Second elastic member; 10. Moving contact; 11. Limit block; 12. Stop block; 13. Protrusion; 14. First contact surface; 15. Second contact surface; 16. Slide groove; 17. Jump buckle; 18. Third elastic member; 19. Locking opening; 20. Moving contact frame; 21. Moving contact; 22. First rotating shaft; 23. Second boss. DETAILED DESCRIPTION

[0024] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] Example

[0029] This embodiment provides a circuit breaker with energy storage and fast action, such as Figure 1 As shown, it includes a contact mechanism, an energy storage mechanism and an operating mechanism.

[0030] Energy storage mechanism, such as Figure 2 , Figure 3 and Figure 4As shown, it includes a first locking member 8 and a second elastic member 9. The first locking member 8 can be installed on the housing 1 in a translational manner, and has a locking position that cooperates with the moving contact assembly 3 to lock, and an unlocking position that is driven by the knob 4 and separated from the moving contact assembly 3. In this embodiment, the first locking member 8 has a stopper 12 adjacent to one end of the moving contact assembly 3 and can abut against the limit block 11, and a first contact surface 14 adjacent to the knob 4, and the first contact surface 14 is an arc-shaped surface. The second elastic member 9 is a compression spring, one end of which abuts against the inner wall of the housing 1, and the other end abuts against the first locking member 8. The second elastic member 9 applies an elastic force to the first locking member 8 to translate toward the locking position. As shown Figure 1 As shown, a slide groove 16 is formed on the housing 1 for the first locking member 8 to slide left and right.

[0031] The contact mechanism includes a stationary contact 2 fixed on a housing 1, and a moving contact assembly 3 rotatably mounted on the housing 1. In this embodiment, the moving contact assembly 3 includes a moving contact frame 20, and a moving contact 21 fixed on the moving contact frame 20. The stationary contact 2 is provided with a stationary contact point, and the moving contact 21 is provided with a moving contact 10 corresponding to the stationary contact point. The moving contact frame 20 is made of plastic. A stop block 11 is provided at the end of the moving contact frame 20 away from the moving contact point 10. The stop block 11 is a first convex column integrally formed on the moving contact frame 20. During the closing process, the moving contact assembly 3 has a first state (such as a first state) in which it is linked with the rotating wheel 6 and rotates toward the stationary contact 2. Figure 2 ), and a second state (as shown) in which the first locking member 8 is locked and the distance with the static contact 2 is kept unchanged. Figure 3 ), and a third state (as shown) in which the first locking member 8 is unlocked and in contact with the static contact 2. Figure 4 As shown), wherein, when the moving contact assembly 3 is in the second state, the rotating wheel 6 rotates relative to the moving contact assembly 3, and the first elastic member 7 stores energy; after the moving contact assembly 3 is unlocked from the first locking member 8, the first elastic member 7 releases energy.

[0032] As a convertible implementation, the limit block 11 may also be arranged at the end of the moving contact 21 away from the moving contact point 10 .

[0033] Operating mechanism, such as Figure 6 As shown, it includes a knob 4, a connecting rod 5 and a driving release mechanism.

[0034] The knob 4 is rotatably mounted on the housing 1. Figure 2 and 3As shown, the knob 4 has a protrusion 13 that abuts against the first locking member 8 of the energy storage mechanism and drives it to translate toward the unlocking position, and a second contact surface 15 that is arranged corresponding to the first contact surface 14, wherein when the first locking member 8 is in the locking position, the first contact surface 14 abuts against the second contact surface 15, thereby limiting the translation position of the first locking member 8. In this embodiment, the first contact surface 14 and the second contact surface 15 are arc-shaped contact surfaces that cooperate with each other, thereby reducing the friction between the knob 4 and the first locking member 8. The connecting rod 5 is a U-shaped rod, one end of which is inserted into the jack of the knob 4, and the other end can cooperate with the rotating wheel 6.

[0035] Drive trip mechanism, such as Figure 6 As shown, it includes a rotating wheel 6, a jump button 17, a first elastic member 7 and a third elastic member 18. In this embodiment, the rotating wheel 6, the jump button 17 and the moving contact frame 20 all rotate around the same first rotating shaft 22. Figure 5 As shown, the first elastic member 7 is a tension spring, and the rotating wheel 6 drives the moving contact frame 20 to rotate through the tension spring. The rotating wheel 6 is formed with a second convex column 23 for hanging one end of the tension spring, and the moving contact frame 20 is formed with a hanging hole for hanging the other end of the tension spring. The third elastic member 18 has one end against the jumper 17 and the other end against the rotating wheel 6. Under the elastic force of the third elastic member 18, a locking opening 19 for inserting the end of the connecting rod 5 is formed between the jumper 17 and the rotating wheel 6. During the closing process, the end of the connecting rod 5 is against the locking opening 19, thereby driving the rotating wheel 6 to rotate in the closing direction; when a short circuit, overload, etc. occur, the jumper 17 rotates counterclockwise relative to the rotating wheel 6 under the action of an external force, thereby opening the locking opening 19, and the end of the connecting rod 5 moves out of the opened locking opening 19, and the rotating wheel 6 rotates in the opening direction under the action of the reset spring. It should be noted that, in addition to the driving tripping mechanism in this embodiment, there are various implementation schemes of the driving tripping mechanism in the prior art. Therefore, for those skilled in the art, the structure of the driving tripping mechanism can be adaptively changed.

[0036] The working principle of the energy storage fast-acting circuit breaker of the utility model is as follows:

[0037] When the switch is closed, the knob 4 rotates clockwise under the action of external force, and the end of the link rod 5 abuts against the locking opening 19 of the driving tripping mechanism, thereby driving the rotating wheel 6 and the tripping buckle 17 to rotate clockwise around the first rotating shaft 22, and the rotating wheel 6 drives the moving contact assembly 3 to rotate in the direction close to the static contact 2 through the first elastic member 7; when the limit block 11 of the moving contact assembly 3 abuts against the stop block 12 of the first locking member 8, the position of the moving contact assembly 3 remains unchanged (such as Figure 3 As shown, that is, the distance between the moving contact 21 and the stationary contact 2 remains unchanged), and the rotating wheel 6 continues to rotate clockwise under the action of the knob 4 and the connecting rod 5. During this process, the first elastic member 7 is stretched by the rotating wheel 6 to store energy; Figure 4 As shown, when the knob 4 is rotated until the protrusion 13 abuts against the first locking member 8, thereby driving the first locking member 8 to translate toward the left direction, the stop block 12 of the first locking member 8 is separated from the limit block 11 of the moving contact assembly 3, and the first elastic member 7 releases energy, thereby quickly driving the moving contact 21 of the moving contact assembly 3 to contact and connect with the static contact 2.

[0038] The utility model provides a circuit breaker with energy storage and fast action, by setting an energy storage mechanism, the energy storage mechanism includes a first locking member 8 and a second elastic member 9, the first locking member 8 can be installed on the housing 1 in a translational manner, and has a locking position for locking with the moving contact assembly 3, and an unlocking position driven by the knob 4 and separated from the moving contact assembly 3; when closing the circuit, the knob 4 drives the rotating wheel 6 and the moving contact assembly 3 to rotate through the connecting rod 5 until the moving contact assembly 3 is locked by the first locking member 8, the position of the moving contact assembly 3 remains stationary, and the rotating wheel 6 continues to rotate relative to the moving contact assembly 3 under the drive of the knob 4, the first elastic member 7 accumulates energy, and when the knob 4 rotates to the position of driving the first locking member 8 to separate from the moving contact assembly 3, the first elastic member 7 releases energy, thereby quickly driving the moving contact assembly 3 to contact and communicate with the static contact 2. Compared with the prior art, the driving force for the connection of the moving and static contacts is generated by the action of the energy storage mechanism inside the circuit breaker, avoiding the situation where the contacts are not connected due to human factors, resulting in the contact being burned or welded due to high temperature, thereby increasing the service life of the circuit breaker.

[0039] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A fast-acting energy storage circuit breaker, characterized in that: include: A contact mechanism comprises a stationary contact (2) and a moving contact assembly (3) rotatably mounted in a housing (1); An operating mechanism comprises a knob (4), a connecting rod (5) and a rotating wheel (6); the knob (4) drives the rotating wheel (6) to rotate via the connecting rod (5); a first elastic member (7) is provided between the rotating wheel (6) and the moving contact assembly (3); An energy storage mechanism, comprising a first locking member (8) and a second elastic member (9), wherein the first locking member (8) is installed on the housing (1) in a translationally movable manner, and has a locking position for locking with the moving contact assembly (3), and an unlocking position for separating from the moving contact assembly (3) by being driven by the knob (4), and the second elastic member (9) applies an elastic force to the first locking member (8) for translation in the direction of the locking position; During the closing process, the moving contact assembly (3) has a first state in which it is linked with the rotating wheel (6) and rotates toward the static contact (2); a second state in which it is locked with the first locking member (8) and maintains a constant distance with the static contact (2); and a third state in which it is in contact and connected with the static contact (2) after being unlocked from the first locking member (8). When the moving contact assembly (3) is in the second state, the rotating wheel (6) rotates relative to the moving contact assembly (3), and the first elastic member (7) stores energy; after the moving contact assembly (3) is unlocked from the first locking member (8), the first elastic member (7) releases energy.

2. The energy storage fast-acting circuit breaker according to claim 1, characterized in that: The moving contact assembly (3) has a moving contact point (10) and a limit block (11) respectively arranged at two ends thereof, and the first locking member (8) is provided with a stop block (12) at one end adjacent to the moving contact assembly (3) and capable of abutting against the limit block (11).

3. The energy storage fast-acting circuit breaker according to claim 1 or 2, characterized in that: The knob (4) has a protrusion (13) which abuts against the first locking member (8) and drives it to translate toward the unlocking position.

4. The energy storage fast-acting circuit breaker according to claim 1, characterized in that: The first locking member (8) has a first contact surface (14) adjacent to the knob (4), and the knob (4) has a second contact surface (15) arranged corresponding to the first contact surface (14), wherein when the first locking member (8) is in the locking position, the first contact surface (14) abuts against the second contact surface (15).

5. The energy storage fast-acting circuit breaker according to claim 1, characterized in that: The housing (1) is formed with a sliding groove (16) for the first locking member (8) to slide.

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