Clutch structure, manual and automatic opening and closing mechanism and circuit breaker

Abstract

The utility model relates to a clutch structure, a manual and automatic opening and closing mechanism and a circuit breaker, a motor can be adopted to drive a clutch gear to push a main shaft to rotate through cooperation of a spring bolt and a combination surface on a clutch disc, the main shaft can also be directly driven to rotate, and the spring bolt is pushed away through a separation piece when the main shaft is directly driven to rotate. The clutch gear is separated from the clutch disc, it is ensured that the clutch gear cannot be driven to rotate when the main shaft rotates, rapid switching-on and switching-off of the manual and automatic reclosing mechanism are controlled electrically and manually through the clutch structure, no interference exists between electric control and manual control, and through the angle design of an external expansion arc and the symmetrical design of the double lock tongues, the manual and automatic reclosing mechanism can be rapidly switched on and switched off. The rotation angle of the main shaft from the opening state to the closing state is smaller than or equal to 90 degrees, and the use requirement of the switch cabinet is met.

Description

Clutch structure, manual and automatic opening and closing mechanism and circuit breaker Technical Field

[0001] This utility model relates to a clutch structure, a manual / automatic opening and closing mechanism using the clutch structure, and a circuit breaker using the manual / automatic opening and closing mechanism. Background Technology

[0002] To achieve remote opening and closing control of circuit breakers, a manual / automatic opening and closing mechanism needs to be added to the circuit breaker. This mechanism is an integrated operating system combining electric and manual operation. Currently, commercially available integrated electric and manual operating mechanisms typically use AC motors, resulting in slow closing and opening speeds (3-5 seconds). In the event of an accident, they cannot quickly respond to signals from remote control. Furthermore, to meet the requirements for use in switchgear, the operating rules for integrated electric and manual operating mechanisms of circuit breakers require the spindle rotation angle to be ≤90°.

[0003] To fill the gap in the market for integrated electric and manual operating mechanisms suitable for rapid opening and closing in switchgear, this utility model proposes a clutch structure, a manual / automatic opening and closing mechanism, and a circuit breaker. Summary of the Invention

[0004] To address the aforementioned shortcomings, this utility model provides a clutch structure, a manual / automatic closing mechanism, and a circuit breaker that meet the requirements of switchgear use and enable manual / automatic rapid opening and closing. When the circuit breaker is providing protection, a mechanical structure allows the electric control indicator panel to accurately indicate the circuit breaker status (NO, OFF, TRIPPED).

[0005] To achieve the above objectives, this utility model relates to a clutch structure, including a clutch gear and a main shaft. The clutch gear is sleeved on the main shaft and can rotate freely relative to the main shaft. A clutch disc is fixedly arranged on the main shaft inside the clutch gear. A protruding outward-expanding arc is formed on the clutch disc, and the two ends of the outward-expanding arc form engagement surfaces. Two locking tongues facing the clutch disc are arranged opposite each other on the clutch gear. A spring is provided at the rear end of each locking tongue. The position where the locking tongue extends forward under the elastic force of the spring is the engagement position, and the position where the locking tongue retracts backward by compressing the spring is the disengagement position. A pushing surface is formed on one side of the front end of the locking tongue, and a yielding surface is formed on the other side. The pushing surface pushes the clutch disc to rotate at the engagement position by cooperating with the engagement surface. The yielding surface cooperates with the outward-expanding arc to push the locking tongue to move towards the disengagement position. A separating member is fixedly arranged on the movement trajectory of the locking tongue as it rotates with the clutch gear. A separating part is formed on the locking tongue opposite to the separating member. The separating member squeezes the separating part to drive the locking tongue to move towards the disengagement position.

[0006] With the above technical solution, the utility model can drive the clutch gear by an external power source to cooperate with the mating surface on the clutch disc through the locking tongue to push the main shaft to rotate forward and backward, or directly drive the main shaft to rotate forward and backward. When directly driving the main shaft to rotate, the locking tongue is pushed away by the separating member to separate the connection between the clutch gear and the clutch disc, ensuring that the clutch gear will not be driven to rotate when the main shaft rotates. The symmetrically arranged locking tongues can push away the locking tongues when the clutch gear rotates in two directions at an angle < 180°, reducing the rotation angle of the main shaft.

[0007] Specifically, the radian of the outward expanding arc ≤ 180°. In this technical solution, the angle setting of the outward expanding arc配合对称设置的锁舌 (should be something like "cooperates with the symmetrically arranged locking tongues"), can achieve a rotation angle of the main shaft ≤ 90°.

[0008] Specifically, a locking tongue groove is provided on the clutch gear. The opening of the locking tongue groove faces the center of the clutch gear. The cross-section of the locking tongue groove is in a "convex" shape with a narrow upper part and a wide lower part. The locking tongue is inserted into and exits the locking tongue groove. The separating part of the locking tongue is arranged at the upper part of the locking tongue and is adapted to the upper part of the "convex" shape of the locking tongue groove. The pushing surface and the yielding surface of the locking tongue are arranged at the lower part of the locking tongue and are adapted to the lower part of the "convex" shape of the locking tongue groove. The spring is arranged between the locking tongue and the bottom surface of the locking tongue groove. This technical solution limits the locking tongue, facilitating the installation of the locking tongue, and the locking tongue moves stably with high reliability.

[0009] Specifically, a spring groove is opened at the center of the rear end of the locking tongue, and one end of the spring is arranged in the spring groove.

[0010] The utility model also relates to a manual and automatic switching mechanism, which includes a motor, a gear set, a cam, a slider, and the above clutch structure. The main shaft is fixedly connected to the center of the cam. The motor is linked to the clutch gear through the gear set, and the top of the cam is connected to the slider.

[0011] In the above technical solution, the electric switching control of the manual and automatic switching mechanism is achieved through the combination of the clutch structure, and the manual control of the manual and automatic switching mechanism without affecting the motor is achieved through the separation of the clutch structure. When the slider is in the open position, the center of the outward expanding arc of the clutch wheel is placed at the separating member. When closing, the rotation angle of the main shaft ≤ 90° can reach the separation position and achieve closing.

[0012] Specifically, the manual and automatic switching mechanism further includes an indicating disc. The indicating disc is arranged at the upper end of the main shaft and rotates with the main shaft. The indicating disc is provided with an open position indicator, a closed position indicator, and a tripping position indicator. The angle between the connecting line of the center of the open position indicator and the axis of the main shaft and the connecting line of the center of the closed position indicator and the axis of the main shaft ≤ 90°.

[0013] The indicator panel in the above technical solution can fully indicate the status when the rotation angle is ≤90°, which meets the requirements for the use of the mechanism in the switch cabinet.

[0014] Specifically, the manual / automatic opening and closing mechanism further includes an upper mounting plate and a lower mounting plate. The separating component is disposed on the upper mounting plate, the motor is disposed on the lower mounting plate, the gear set and the clutch gear are disposed between the upper mounting plate and the lower mounting plate, the main shaft passes through the upper mounting plate and the lower mounting plate, and the cam is disposed on the main shaft below the lower mounting plate.

[0015] The above technical solution adopts modular assembly by mounting the various components of the mechanism on the upper and lower mounting plates, which facilitates maintenance and replacement.

[0016] Specifically, a pulley is provided at the top of the cam, a guide shaft is provided below the lower mounting plate, the slider is disposed on the guide shaft, a slider groove is provided on the slider, the pulley is disposed in the slider groove and moves the slider on the guide shaft.

[0017] Specifically, there are two guide shafts, guide grooves are formed on both sides of the slider, the slider slides on the guide shaft through the guide grooves, and the slider groove is located at the center of the slider.

[0018] This utility model also relates to a circuit breaker, which is equipped with the above-mentioned manual and automatic opening and closing mechanism, and the handle of the circuit breaker is connected to the slider.

[0019] The beneficial effects of this utility model are that it adopts a clutch structure to realize the rapid opening and closing of the electric and manual control automatic reclosing mechanism, and there is no interference between electric and manual operation; through the outer arc angle design and double locking tongue symmetrical design, the main shaft rotation angle from the opening state to the closing state is ≤90°, which meets the requirements of switchgear. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the closed state of a specific embodiment 1 of this utility model.

[0021] Figure 2 is a front view of the closed state of a specific embodiment 1 of this utility model.

[0022] Figure 3 is a schematic diagram of the open state of a specific embodiment 1 of this utility model.

[0023] Figure 4 is a front view of the open state of a specific embodiment 1 of this utility model.

[0024] Figure 5 is an exploded view of the open state of a specific embodiment 1 of this utility model.

[0025] Figure 6 is a schematic diagram of the closed state of a specific embodiment 2 of this utility model.

[0026] Figure 7 is an exploded view of the closed state of a specific embodiment 2 of this utility model.

[0027] Figure 8 is a top view of the indicator panel assembly in specific embodiment 2 of this utility model. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] Example 1

[0030] As shown in Figures 1 to 5, this embodiment is a clutch structure, including a clutch gear 1 and a main shaft 2. The clutch gear 1 is sleeved on the main shaft 2 and can rotate freely relative to the main shaft 2. A clutch disc 3 is fixedly disposed on the main shaft 2 inside the clutch gear 1. A protruding outwardly expanding arc 31 is formed on the clutch disc 3, the arc of the outwardly expanding arc 31 is ≤180°, and the two ends of the outwardly expanding arc 31 form a mating surface 32. Two mating surfaces 32 are arranged opposite each other on the clutch gear 1 facing the clutch gear 1. The locking tongue 4 of the clutch disc 3 has a locking tongue groove 11 on the clutch gear 1. The opening of the locking tongue groove 11 faces the center of the clutch gear 1. The cross-section of the locking tongue groove 11 is a "convex" shape, narrower at the top and wider at the bottom. The locking tongue 4 is inserted into the locking tongue groove 11 and moves in and out. The upper part of the locking tongue 4 forms a separation part 41, which is adapted to the upper part of the "convex" shape of the locking tongue groove 11. One side of the lower front end of the locking tongue 4 forms a pushing surface 42, and the other side forms a retraction surface 43. The pushing surface 42 and the yielding surface 43 of the latch 4 are adapted to the "convex" shaped lower part of the latch groove 11. A spring 40 is provided at the rear end of the latch 4. The spring 40 is located between the bottom surface of the latch 4 and the latch groove 11. A spring groove 44 is opened at the center of the rear end of the latch 4. One end of the spring 40 is located in the spring groove 44. The position where the latch 4 extends forward under the elastic force of the spring 40 is the engagement position. The position where the latch 4 retracts backward by compressing the spring 40 is the disengagement position. The pushing surface 42 pushes the clutch disc 3 to rotate in the engagement position by cooperating with the engagement surface 32. The yielding surface 43 cooperates with the outward expansion arc 31 to push the latch 4 to move towards the disengagement position. A separation member 5 is fixedly provided on the movement trajectory of the latch 4 as it rotates with the clutch gear 1. The separation part 41 on the latch 4 is positioned opposite the separation member 5. The separation member 5 squeezes the separation part 41 to drive the latch 4 to move towards the disengagement position.

[0031] In the above specific embodiment, the clutch structure can be driven by an external power source to rotate the main shaft 2 through the engagement surface 32 on the clutch disc 3 via the locking tongue 4. Alternatively, it can directly drive the main shaft 2 to rotate. When directly driving the main shaft 2 to rotate, the separating member 5 pushes away the locking tongue 4, separating the clutch gear 1 from the clutch disc 3, ensuring that the clutch gear 1 is not driven to rotate when the main shaft 2 rotates. In this specific embodiment, the outwardly expanding arc angle setting, combined with the symmetrically arranged locking tongue, can achieve a main shaft rotation angle ≤90°.

[0032] Example 2

[0033] As shown in Figures 1 to 8, this embodiment is a manual / automatic opening and closing mechanism, including a motor 01, a gear set 02, a cam 03, a slider 04, an indicator disk 05, an upper mounting plate 06, a lower mounting plate 07, and a clutch structure as described in specific embodiment 1. The main shaft 2 is fixedly connected to the center of the cam 03. The motor 01 is linked to the clutch gear 1 through the gear set 02. The top of the cam 03 is connected to the slider 04. The indicator disk 05 is disposed at the upper end of the main shaft 2 and rotates with the main shaft 2. The indicator disk 05 is provided with an opening indicator position, a closing indicator position, and a tripping indicator position. The angle α between the line connecting the center of the opening indicator position and the axis of the main shaft 2 and the line connecting the center of the closing indicator position and the axis of the main shaft 2 is ≤ 90°. The upper end of the separating component 5 is fixedly mounted on the upper mounting plate 06. The motor 01 is mounted on the lower mounting plate 07. The gear set 02 and the clutch gear 1 are located between the upper mounting plate 06 and the lower mounting plate 07. The main shaft 2 passes through the upper mounting plate 06 and the lower mounting plate 07. The cam 03 is located on the main shaft 2 below the lower mounting plate 07. A pulley 031 is provided at the top of the cam 03. A guide shaft 08 is provided below the lower mounting plate 07. The slider 04 is mounted on the guide shaft 08. A slider groove 041 is formed on the slider 04. The pulley 031 is located in the slider groove 041 and moves the slider 04 on the guide shaft 08. There are two guide shafts 08. Guide grooves are formed on both sides of the slider 04. The slider 04 slides on the guide shaft 08 through the guide grooves. The slider groove 041 is located at the center of the slider 04.

[0034] The above technical solution achieves electric control of the manual / automatic opening and closing mechanism through a clutch structure, and achieves manual control of the manual / automatic opening and closing mechanism without affecting the motor through the separation of the clutch structure. When the slider 04 is in the open position, the center of the outer arc 31 of the clutch wheel 3 is placed at the separating part 5. When closing, the rotation angle of the main shaft 2 is ≤90° to reach the separating position and achieve closing. The rotation angle α of the indicator panel 05 is ≤90° to fully indicate the status, meeting the requirements for use of the mechanism in the switch cabinet.

[0035] Example 3

[0036] As shown in Figures 1 to 8, this embodiment is a circuit breaker, which is equipped with the manual / automatic opening and closing mechanism described in Embodiment 2 above, and the handle of the circuit breaker is connected to the slider 04.

[0037] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A clutch structure, characterized in that: The clutch structure includes a clutch gear and a main shaft. The clutch gear is sleeved on the main shaft and can rotate freely relative to the main shaft. A clutch disc is fixedly arranged on the main shaft inside the clutch gear. An outwardly expanding arc is formed on the clutch disc. Engagement surfaces are formed on both side surfaces at the two ends of the outwardly expanding arc. Two locking tongues facing the clutch disc are oppositely arranged on the clutch gear. A spring is arranged at the rear end of the locking tongue. The position where the locking tongue extends forward under the pushing force of the spring is the engagement position, and the position where the locking tongue retracts backward by compressing the spring is the separation position. A pushing surface is formed on one side of the front end of the locking tongue, and a yielding surface is formed on the other side. The pushing surface drives the clutch disc to rotate through cooperation with the engagement surface at the engagement position. The yielding surface cooperates with the outwardly expanding arc to push the locking tongue towards the separation position. A separating member is fixedly arranged on the movement track of the locking tongue as it rotates with the clutch gear. A separating portion is formed on the locking tongue opposite to the separating member. The separating member squeezes the separating portion to drive the locking tongue towards the separation position.

2. The clutch structure according to claim 1, characterized in that: The radian of the outwardly expanding arc ≤ 180°.

3. The clutch structure according to claim 1 or 2, characterized in that: A locking tongue groove is arranged on the clutch gear. The opening of the locking tongue groove faces the center of the clutch gear. The cross-section of the locking tongue groove is in a "convex" shape with a narrow upper part and a wide lower part. The locking tongue is inserted into and exits from the locking tongue groove. The separating portion of the locking tongue is arranged on the upper part of the locking tongue and is adapted to the upper part of the "convex" shape of the locking tongue groove. The pushing surface and the yielding surface of the locking tongue are arranged on the lower part of the locking tongue and are adapted to the lower part of the "convex" shape of the locking tongue groove. The spring is arranged between the locking tongue and the bottom surface of the locking tongue groove.

4. The clutch structure according to claim 3, characterized in that: A spring groove is opened at the center of the rear end of the locking tongue. One end of the spring is arranged in the spring groove.

5. A manual / automatic opening and closing mechanism, characterized in that: The manual and automatic closing and opening mechanism includes a motor, a gear set, a cam, a slider, and the clutch structure according to any one of claims 1 to 4. The main shaft is fixedly connected to the center of the cam. The motor is linked and connected to the clutch gear through the gear set. The top end of the cam is connected to the slider.

6. The manual / automatic opening and closing mechanism according to claim 5, characterized in that: The manual and automatic closing and opening mechanism further includes an indicating disc. The indicating disc is arranged at the upper end of the main shaft and rotates with the main shaft. The indicating disc is provided with a tripping indication position, a closing indication position, and a release indication position. The angle between the connecting line of the center of the tripping indication position and the axis of the main shaft and the connecting line of the center of the closing indication position and the axis of the main shaft ≤ 90°.

7. The manual / automatic opening and closing mechanism according to claim 5 or 6, characterized in that: The manual and automatic closing and opening mechanism further includes an upper mounting plate and a lower mounting plate. The separating member is arranged on the upper mounting plate. The motor is arranged on the lower mounting plate. The gear set and the clutch gear are arranged between the upper mounting plate and the lower mounting plate. The main shaft passes through the upper mounting plate and the lower mounting plate. The cam is arranged on the main shaft below the lower mounting plate.

8. The manual / automatic opening and closing mechanism according to claim 7, characterized in that: A pulley is arranged at the top end of the cam. A guiding shaft is arranged below the lower mounting plate. The slider is arranged on the guiding shaft. A slider groove is opened on the slider. The pulley is arranged in the slider groove and drives the slider to move on the guiding shaft.

9. The manual / automatic opening and closing mechanism according to claim 8, characterized in that: There are two guide shafts, and guide grooves are formed on both sides of the slider. The slider slides on the guide shafts through the guide grooves, and the slider groove is located at the center of the slider.

10. A circuit breaker, characterized in that: The circuit breaker is provided with a manual / automatic opening and closing mechanism as described in any one of claims 5 to 9, and the handle of the circuit breaker is connected to the slider.

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