A closing energy storage mechanism of a miniature circuit breaker and the miniature circuit breaker

Abstract

The utility model provides a kind of closing energy storage mechanism of small circuit breaker and small circuit breaker, including shell, shell cylinder, handle, movable contact, contact spring, damper and damper passage, shell cylinder is arranged in shell, handle rotatably is sleeved in the peripheral side of shell cylinder;Movable contact rotatably is arranged in shell, contact spring is used to drive movable contact rotation;Transmission assembly is further provided between the handle and contact spring;Damper passage is arranged on shell, the damper is slidably arranged in damper passage.The utility model when closing, damper will abut between movable contact and handle energy storage protrusion, contact spring will continue to deform and store energy, when handle energy storage protrusion rotates to separate from damper, the elasticity in contact spring will be released instantaneously, so that movable contact is quickly adhered to static contact, shorten the time of movable contact to static contact close, avoid the generation of arc between movable contact contact and static contact contact.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to a closing energy storage mechanism for a miniature circuit breaker and a miniature circuit breaker. Background Technology

[0002] Circuit breakers are the most common switching devices in circuit systems. Circuit breaker switches are controlled by rotating an operating handle, and their closing speed often depends on the operator's speed. Since the circuit is connected by the contact of moving and stationary contacts, current needs to flow between them. When the moving contact approaches the stationary contact, an electric arc will be generated between them. Therefore, to avoid the generation of an arc, the moving contact needs to move quickly towards the stationary contact during closing. However, relying solely on manual operation cannot prevent the generation of an arc; therefore, a closing energy storage mechanism for miniature circuit breakers needs to be designed. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the technical problem to be solved by this utility model is to provide a closing energy storage mechanism and circuit breaker for a miniature circuit breaker, which, when closing, causes the moving contact to quickly move closer to the stationary contact, thereby avoiding the generation of an electric arc between the moving contact and the stationary contact.

[0004] To achieve the above objectives, this utility model provides a closing energy storage mechanism for a miniature circuit breaker, comprising a housing, a housing cylinder, a handle, a moving contact, a contact spring, a damper, and a damper channel. The housing cylinder is disposed within the housing, and the handle is rotatably sleeved on the outer periphery of the housing cylinder. The moving contact is rotatably disposed within the housing, and the contact spring is used to drive the moving contact to rotate. A transmission assembly is also provided between the handle and the contact spring. The damper channel is disposed on the housing, and the damper is slidably disposed within the damper channel. The handle is provided with a handle energy storage protrusion, and one end of the damper abuts against the moving contact, while the other end abuts against or separates from the handle energy storage protrusion.

[0005] Preferably, the energy storage protrusion of the handle is disposed on the bottom end surface of the handle, and a protrusion movement groove is provided on the housing. A handle support block is disposed on the outer side of the protrusion movement groove. When the handle is sleeved on the outer periphery of the housing cylinder, the energy storage protrusion of the handle is located in the protrusion movement groove, and the bottom end surface of the handle abuts against the handle support block.

[0006] Preferably, the damper includes a damper body, a damper stop, and an elastic hook. The damper stop is disposed on the top surface of the damper body and is used to abut against the moving contact. The elastic hook is disposed on the outer surface of the damper body and is used to abut against the damper channel. The end of the damper body away from the damper stop abuts or separates from the handle energy storage protrusion.

[0007] Preferably, the damper channel includes a positioning shaft and a housing stop, both of which are mounted on the housing; a damper groove is provided on the bottom surface of the damper body, and the damper groove is fitted onto the positioning shaft; the end of the elastic hook away from the damper body abuts against the housing stop; and the side wall of the damper body away from the moving contact abuts against the handle support block.

[0008] Preferably, the end face of the elastic hook that abuts against the housing block is an arc surface.

[0009] Preferably, the handle includes a handle cylinder, a lever, and a handle spring. The handle cylinder is sleeved on the outer circumferential surface of the housing cylinder, and the two ends of the handle spring abut against the handle cylinder and the housing cylinder, respectively. The lever is fixed on the outer circumferential surface of the handle cylinder.

[0010] Preferably, the handle energy storage protrusion is arc-shaped and extends circumferentially from the center of the handle cylinder, located on the bottom end face of the handle cylinder; the protrusion motion groove is arc-shaped and extends circumferentially from the center of the housing cylinder, located on the outer periphery of the housing cylinder; the end face of the damper body away from the damper stop is arc-shaped.

[0011] Preferably, the handle cylinder has a connection hole for connecting the transmission component, and the lever has a connecting hole.

[0012] Preferably, the moving contact includes a moving contact body, a moving contact bend, and a moving contact point. One end of the moving contact body has a moving contact hinge hole, and the moving contact point is located at the end of the moving contact body away from the moving contact hinge hole. The moving contact bend is fixedly mounted on the moving contact body. A pin is also provided in the housing, and the moving contact is rotatably mounted on the pin through the moving contact hinge hole. When closing and storing energy, the contact spring abuts against one side wall of the moving contact bend, and the other side wall of the moving contact bend abuts against the damper.

[0013] To achieve the above or other objectives, this utility model also discloses a miniature circuit breaker, including the closing energy storage mechanism of the miniature circuit breaker described above.

[0014] As described above, the closing energy storage mechanism and circuit breaker of the miniature circuit breaker involved in this utility model have the following beneficial effects:

[0015] This utility model relates to a closing energy storage mechanism and circuit breaker for a miniature circuit breaker. During closing, rotating the handle causes the contact spring to deform via a transmission assembly. The contact spring abuts against the moving contact, applying a force close to the stationary contact. However, due to the presence of a damper, one end of the damper abuts against the moving contact, and the other end abuts against the energy storage protrusion on the handle. The moving contact cannot approach the stationary contact, and the contact spring continues to deform and store energy. When the handle is rotated a certain angle, the contact protrusion on the handle separates from the end of the damper, and the damper moves within its channel. The contact spring instantly releases its elastic force, propelling the moving contact rapidly towards the stationary contact. This shortens the time it takes for the moving contact to approach the stationary contact, preventing the generation of an electric arc. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the spatial structure of the closing energy storage mechanism of the miniature circuit breaker of this utility model;

[0017] Figure 2 yes Figure 1 The main view in the middle;

[0018] Figure 3 yes Figure 1 The rear view in the middle;

[0019] Figure 4 This is a schematic diagram showing the connection of the damper in the housing of the closing energy storage mechanism of the miniature circuit breaker of this utility model;

[0020] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0021] Figure 6 This is a schematic diagram of the shell structure in the closing energy storage mechanism of the miniature circuit breaker of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Handle; 101. Lever; 1010. Linkage hole; 102. Handle cylinder; 1021. Handle energy storage protrusion; 1020. Connection hole; 103. Handle spring; 2. Damper; 201. Damper body; 2010. Damper groove; 202. Damper stop; 203. Elastic hook; 2030. Arc surface; 3. Moving contact; 301. Moving contact body; 302. Moving contact bend; 303. Moving contact point; 4. Contact spring; 5. Pin; 6. Housing; 601. Housing cylinder; 602. Protrusion movement groove; 603. Handle support block; 604. Housing stop; 605. Positioning shaft. Detailed Implementation

[0024] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0025] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0026] like Figures 1-6 As shown, this utility model provides a closing energy storage mechanism for a miniature circuit breaker, including a housing 6, a housing cylinder 601, a handle 1, a moving contact 3, a contact spring 4, a damper 2, and a damper channel. The housing cylinder 601 is disposed in the housing 6, and the handle 1 is rotatably sleeved on the outer periphery of the housing cylinder 601. The moving contact 3 is rotatably disposed in the housing 6, and the contact spring 4 is used to drive the moving contact 3 to rotate. A transmission component is also provided between the handle 1 and the contact spring 4. The damper channel is disposed on the housing 6, and the damper 2 is slidably disposed in the damper channel. The handle 1 is provided with a handle energy storage protrusion 1021, one end of the damper 2 abuts against the moving contact 3, and the other end abuts against or separates from the handle energy storage protrusion 1021.

[0027] The closing energy storage mechanism of this utility model relates to a miniature circuit breaker, which is equipped with a damper 2. One end of the damper 2 abuts against the moving contact 3, and the other end abuts against or separates from the energy storage protrusion 1021 on the handle. When closing, the handle 1 drives the contact spring 4 to deform through the transmission component. The contact spring 4 abuts against the moving contact 3 and applies a rotational force to the moving contact 3. Due to the presence of the damper 2, the moving contact 3 cannot move. As the handle 1 rotates, the contact spring 4 continues to deform and store energy. When the handle 1 rotates to a certain angle, the energy storage protrusion 1021 on the handle separates from the damper 2, and the damper 2 moves in the damper channel. The moving contact 3 can rotate towards the stationary contact, and the elastic force in the contact spring 4 is quickly released, accelerating the rotation speed of the moving contact 3 and preventing the generation of an electric arc between the moving contact 3 and the stationary contact.

[0028] Preferred, such as Figure 1 , Figures 4-6As shown, the handle energy storage protrusion 1021 is provided on the bottom end face of the handle 1, and the housing 6 is provided with a protruding motion groove 602. A handle support block 603 is provided on the outer side of the protruding motion groove 602. When the handle 1 is sleeved on the outer periphery of the housing cylinder 601, the handle energy storage protrusion 1021 is located in the protruding motion groove 602, and the bottom end face of the handle 1 abuts against the handle support block 603.

[0029] Preferred, such as Figures 1-6 As shown, the handle 1 includes a handle cylinder 102, a lever 101, and a handle spring 103. The handle cylinder 102 is sleeved on the outer circumferential surface of the housing cylinder 601. The two ends of the handle spring 103 abut against the handle cylinder 102 and the housing cylinder 601, respectively. The lever 101 is fixed on the outer circumferential surface of the handle cylinder 102.

[0030] Preferred, such as Figure 1 , Figure 3 , Figure 4 , Figure 5 As shown, the handle energy storage protrusion 1021 is arc-shaped and extends circumferentially from the center of the handle cylinder 102, set on the bottom end face of the handle cylinder 102; the protruding motion groove 602 is arc-shaped and extends circumferentially from the center of the housing cylinder 601, formed on the outer periphery of the housing 6. The end face of the damper body 201 away from the damper stop 202 is set as an arc-shaped surface, used to fit against the arc-shaped handle energy storage protrusion 1021 sidewall.

[0031] Preferred, such as Figures 1-3 As shown, the handle cylinder 102 has a connection hole 1020 for connecting the transmission component, and the lever 101 has a linkage hole 1010. The linkage hole 1010 passes through the lever 101 along the axial direction of the handle cylinder 102. The handles 1 of two adjacent circuit breakers can be linked together through the linkage hole 1010 and the connecting piece passing through it, so as to realize the unified control of multiple circuit breakers.

[0032] In this embodiment, the circumferential dimension of the raised motion groove 602 is larger than the circumferential dimension of the handle energy storage protrusion 1021. When the handle cylinder 102 is fitted onto the outer periphery of the housing cylinder 601 from top to bottom, the handle support block 603 abuts against the bottom end face of the handle 1, and the handle energy storage protrusion 1021 is located in the raised motion groove 602. By rotating the handle cylinder 102 through the lever 101, the handle cylinder 102 rotates around the housing cylinder 601, and the handle energy storage protrusion 1021 moves in the raised motion groove 602, thereby driving the contact 3 to rotate through the transmission component and the contact spring 4.

[0033] Preferred, such as Figures 1-3As shown, the damper 2 includes a damper body 201, a damper stop 202, and an elastic hook 203. The damper stop 202 is disposed on the top surface of the damper body 201 and is used to abut against the moving contact 3. The elastic hook 203 is disposed on the outer surface of the damper body 201 and is used to abut against the damper channel. The end of the damper body 201 away from the damper stop 202 abuts against or separates from the handle energy storage protrusion 1021.

[0034] Preferred, such as Figures 1-6 As shown, the damper channel includes a positioning shaft 605 and a housing block 604, both of which are mounted on the housing 6. A damper groove 2010 is provided on the bottom surface of the damper body 201, and the damper groove 2010 is fitted onto the positioning shaft 605. The end of the elastic hook 203 away from the damper body 201 abuts against the housing block 604. The side wall of the end of the damper body 201 away from the moving contact 3 abuts against the handle support block 603.

[0035] Preferred, such as Figure 3 , Figure 5 As shown, the end face of the elastic hook 203 that abuts against the housing block 604 is an arc surface 2030.

[0036] In this embodiment, the positioning shaft 605, the housing stop 604, and the handle support block 603 together constitute the damper channel. The end face where the elastic hook 203 abuts against the housing stop 604 is set as an arc surface 2030. The purpose is to reduce the wear between the elastic hook 203 and the housing stop 604 when the damper 2 slides in the damper channel.

[0037] Preferred, such as Figures 1-3 As shown, the moving contact 3 includes a moving contact body 301, a moving contact bending portion 302, and a moving contact point 303. The top of the moving contact body 301 is provided with a moving contact hinge hole, and the moving contact point 303 is provided at the bottom of the moving contact body 301. The moving contact bending portion 302 is fixedly mounted on the moving contact body 301. A pin 5 is also provided in the housing 6, and the moving contact 3 is rotatably mounted on the pin 5 through the moving contact hinge hole. When closing and storing energy, the contact spring 4 abuts against one side wall of the moving contact bending portion 302, and the other side wall of the moving contact bending portion 302 abuts against the damper 2.

[0038] To achieve the above or other objectives, this utility model also discloses a miniature circuit breaker, which includes the closing energy storage mechanism of the miniature circuit breaker described above.

[0039] The working principle of the closing energy storage mechanism and circuit breaker of the miniature circuit breaker involved in this utility model is as follows:

[0040] First, according to the appendix Figures 1-6And the descriptions of the above-mentioned components, and the production and assembly of each component. For example... Figure 2 As shown, the initial state of the closing energy storage mechanism is that the moving contact 3 and the stationary contact are not in contact, the handle 1 is at the leftmost end, the handle energy storage protrusion 1021 is located in the protrusion movement groove 602, and the left end of the damper body 201 abuts against the side wall of the handle energy storage protrusion 1021. The clockwise rotation of the handle 1 is the closing process.

[0041] When the circuit is closed, the handle cylinder 102 is rotated clockwise by the lever 101. The handle spring 103 deforms and stores energy. The handle energy storage protrusion 1021 rotates clockwise in the protrusion movement groove 602. The handle cylinder 102 drives the contact spring 4 to rotate clockwise through the transmission assembly. The contact spring 4 abuts against the bent part 302 of the moving contact clockwise. The bent part 302 of the moving contact abuts against the damper stop 202 clockwise, applying a force to the damper stop 202. Because the left end of the damper body 201 abuts against the side wall of the handle energy storage protrusion 1021, the damper 2 cannot move in the damper channel, and the moving contact 3 cannot approach the stationary contact.

[0042] As the handle 1 continues to rotate, the contact spring 4 continuously deforms and stores energy. When the handle 1 rotates clockwise by a certain angle, the energy storage protrusion 1021 of the handle separates from the end of the damper body 201, that is, the energy storage protrusion 1021 of the handle releases its obstruction to the damper body 201. At this time, the elastic force in the contact spring 4 is released instantaneously, causing the moving contact 3 to quickly contact the stationary contact, thus achieving closing. At the same time, the bending part 302 of the moving contact pushes the damper body 201 along the damper slide groove 2010 in the damper channel toward the handle cylinder 102; the left end of the damper body 201 enters the gap between the bottom end face of the handle cylinder 102 and the protrusion movement groove 602.

[0043] When manually tripped or released, the handle cylinder 102 rotates counterclockwise, the handle spring 103 returns to its original deformation state, and the handle energy storage protrusion 1021 rotates counterclockwise in the protrusion movement groove 602. Since the moving contact bend 302 pushes the damper 2 into the gap between the protrusion movement groove 602 and the bottom end face of the handle cylinder 102, the counterclockwise rotation of the handle energy storage protrusion 1021 will apply a clockwise thrust to the damper body 201. The damper body 201 will deflect clockwise around the positioning shaft 605, and the arc surface 2030 of the elastic hook 203 will abut against the housing stop 604 and deform (e.g., ...). Figure 2 , Figure 5 (As shown).

[0044] When the damper body 201 is deflected clockwise by a certain angle, the arc-shaped surface at the end of the damper body 201 abuts against the outer wall of the handle energy storage protrusion 1021. The deformation and reset of the elastic hook 203 drives the damper body 201 to deflect counterclockwise around the positioning shaft 605. At the same time, the handle energy storage protrusion 1021 applies a force to the arc-shaped surface at the end of the damper body 201. The damper body 201 moves along the damper slide groove 2010 in the damper channel toward the moving contact 3, thus achieving reset.

[0045] The present invention relates to a closing energy storage mechanism and a circuit breaker for a miniature circuit breaker. When closing, the damper 2 abuts against the moving contact 3 and the energy storage protrusion 1021 on the handle. The contact spring 4 continuously deforms and stores energy. When the energy storage protrusion 1021 on the handle rotates to separate from the damper 2, the elastic force in the contact spring 4 is released instantly, pushing the moving contact 3 to rotate on the pin 5, so that the moving contact 3 quickly comes into contact with the stationary contact, shortening the time for the moving contact 3 to approach the stationary contact, and avoiding the generation of an electric arc between the moving contact point 303 and the stationary contact point.

[0046] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0047] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A closing energy storage mechanism for a miniature circuit breaker, characterized in that: The device includes a housing (6), a housing cylinder (601), a handle (1), a moving contact (3), a contact spring (4), a damper (2), and a damper channel. The housing cylinder (601) is disposed in the housing (6), and the handle (1) is rotatably sleeved on the outer periphery of the housing cylinder (601). The moving contact (3) is rotatably disposed in the housing (6), and the contact spring (4) is used to drive the moving contact (3) to rotate. A transmission assembly is also provided between the handle (1) and the contact spring (4). The damper channel is disposed on the housing (6), and the damper (2) is slidably disposed in the damper channel; the handle (1) is provided with a handle energy storage protrusion (1021), one end of the damper (2) abuts against the moving contact (3), and the other end abuts against or separates from the handle energy storage protrusion (1021).

2. The closing energy storage mechanism of the miniature circuit breaker according to claim 1, characterized in that: The handle energy storage protrusion (1021) is provided on the bottom end face of the handle (1), and the housing (6) is provided with a protruding motion groove (602). A handle support block (603) is provided on the outside of the protruding motion groove (602). When the handle (1) is sleeved on the outer periphery of the housing cylinder (601), the handle energy storage protrusion (1021) is located in the protruding motion groove (602), and the bottom end face of the handle (1) abuts against the handle support block (603).

3. The closing energy storage mechanism of the miniature circuit breaker according to claim 2, characterized in that: The damper (2) includes a damper body (201), a damper stop (202), and an elastic hook (203). The damper stop (202) is disposed on the top surface of the damper body (201) and is used to abut against the moving contact (3). The elastic hook (203) is disposed on the outer surface of the damper body (201) and is used to abut against the damper channel. The end of the damper body (201) away from the damper stop (202) abuts against or separates from the handle energy storage protrusion (1021).

4. The closing energy storage mechanism of the miniature circuit breaker according to claim 3, characterized in that: The damper channel includes a positioning shaft (605) and a housing stop (604), both of which are mounted on the housing (6). A damper groove (2010) is provided on the bottom surface of the damper body (201), and the damper groove (2010) is fitted onto the positioning shaft (605). The end of the elastic hook (203) away from the damper body (201) abuts against the housing stop (604). The end sidewall of the damper body (201) away from the moving contact (3) abuts against the handle support block (603).

5. The closing energy storage mechanism of the miniature circuit breaker according to claim 4, characterized in that: The end face of the elastic hook (203) that abuts against the housing block (604) is an arc surface (2030).

6. The closing energy storage mechanism of the miniature circuit breaker according to claim 3, characterized in that: The handle (1) includes a handle cylinder (102), a lever (101), and a handle spring (103). The handle cylinder (102) is sleeved on the outer circumferential surface of the housing cylinder (601). The two ends of the handle spring (103) abut against the handle cylinder (102) and the housing cylinder (601), respectively. The lever (101) is fixed on the outer circumferential surface of the handle cylinder (102).

7. The closing energy storage mechanism of the miniature circuit breaker according to claim 5, characterized in that: The handle energy storage protrusion (1021) is arc-shaped and extends circumferentially from the center of the handle cylinder (102) on the bottom end face of the handle cylinder (102); the protrusion motion groove (602) is arc-shaped and extends circumferentially from the center of the housing cylinder (601) on the outer periphery of the housing (6); the end face of the damper body (201) away from the damper stop (202) is arc-shaped.

8. The closing energy storage mechanism of the miniature circuit breaker according to claim 6, characterized in that: The handle cylinder (102) has a connection hole (1020) for connecting the transmission component, and the lever (101) has a collection hole (1010).

9. The closing energy storage mechanism of the miniature circuit breaker according to claim 1, characterized in that: The moving contact (3) includes a moving contact body (301), a moving contact bend (302), and a moving contact point (303). One end of the moving contact body (301) is provided with a moving contact hinge hole, and the moving contact point (303) is located at the end of the moving contact body (301) away from the moving contact hinge hole. The moving contact bend (302) is fixedly mounted on the moving contact body (301). A pin (5) is also provided in the housing (6), and the moving contact (3) is rotatably mounted on the pin (5) through the moving contact hinge hole. When closing and storing energy, the contact spring (4) abuts against one side wall of the moving contact bend (302), and the other side wall of the moving contact bend (302) abuts against the damper (2).

10. A miniature circuit breaker, characterized in that: The closing energy storage mechanism of the miniature circuit breaker as described in any one of claims 1-9.

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