One-way large torque overrunning clutch for 145kv vacuum circuit breaker

Abstract

The utility model relates to the technical field of overrunning clutches, in particular to one -way big torque overrunning clutch for 145kV vacuum circuit breaker, the inside fixed mounting of shell has the ratchet wheel ring, the gear face of ratchet wheel ring faces left side, the inside of shell is equipped with the connecting seat, the left side fixed mounting of connecting seat has the ratchet wheel disc, the gear face of ratchet wheel disc faces right side, the ratchet wheel disc and through -hole are engaged, the right -hand side of shell central position is provided with through -hole, the right -hand side central position fixed mounting of connecting seat has the clutch flywheel, the clutch flywheel is inserted in the inside of through -hole, through the compression assembly, make ratchet wheel disc and ratchet wheel ring always keep close engagement state, effectively eliminate the wobble gap between both, avoid the impact and the abnormal sound when torque transmission, can automatic compensation when the wear gap appears in long -term operation simultaneously, ensure the stability, continuity and reliability of torque transmission.

Description

Technical Field

[0001] This utility model relates to the field of overrunning clutch technology, and in particular to a one-way high-torque overrunning clutch for 145kV vacuum circuit breakers. Background Technology

[0002] As power systems develop towards higher voltage and larger capacity, 145kV vacuum circuit breakers, as core control equipment in power transmission and distribution, directly affect the safe and efficient operation of the entire power system through their operational reliability and stability. In the operating mechanism of a 145kV vacuum circuit breaker, the transmission system needs to achieve precise power transmission and directional control to ensure the timeliness and accuracy of the circuit breaker's opening and closing actions. The overrunning clutch, as a key component of the transmission system, plays a crucial role in unidirectional torque transmission and preventing reverse power impact.

[0003] The prior art patent document CN201651115U discloses the following: This utility model discloses an overrunning clutch, including a first shaft and a second shaft. A ratchet is connected to the first shaft, and the second shaft is connected to an annular wheel disposed outside the ratchet. The annular wheel has multiple recesses evenly distributed along its inner circumference. A pawl is hinged in each recess. At both ends of the pawl within its hinged rotation range with the recess, one end is completely retracted into the recess and does not contact the ratchet at all, at which time there is no torque transmission between the ratchet and the annular wheel; the other end is completely engaged with the ratchet teeth of the ratchet, at which time torque transmission occurs between the ratchet and the annular wheel. This utility model has a simple structure. When no torque is transmitted, because the pawl does not stick to the ratchet, the wear of the parts in the overrunning clutch is greatly reduced, and the service life of the overrunning clutch is extended. It also enables the overrunning clutch to have a speed limiting function.

[0004] The previous 145kV vacuum circuit breaker used a one-way high-torque overrunning clutch, which lacked an active clamping structure for the engagement state of the ratchet disc and ratchet ring. As a result, the two could not always maintain a tight engagement. During operation, the rattling gap was prone to occur due to factors such as vibration and installation errors. The rattling gap would cause obvious impact and abnormal noise when transmitting torque, which not only affected the quietness of the equipment operation, but also shortened the service life of the components. Utility Model Content

[0005] The purpose of this invention is to provide a one-way high-torque overrunning clutch for 145kV vacuum circuit breakers, solving the problem of the lack of an active clamping structure.

[0006] To achieve the above objectives, this utility model provides a unidirectional high-torque overrunning clutch for a 145kV vacuum circuit breaker, comprising a housing, a ratchet ring fixedly installed on the inner side of the housing with the gear face facing left, a connecting seat provided on the inner side of the housing, a ratchet disc fixedly installed on the left side of the connecting seat with the gear face facing right, the ratchet disc meshing with a through hole, a through hole provided at the center of the right side of the housing, and a clutch flywheel fixedly installed at the center of the right side of the connecting seat, the clutch flywheel being inserted into the through hole.

[0007] As a preferred embodiment of this utility model, the outer shell is provided with an end cover on the left side, and a driven connecting shaft is provided in the center of the left side of the end cover.

[0008] As a preferred embodiment of this utility model, the end cap is internally screwed with multiple fixing screws, and the left side of the outer shell is provided with multiple threaded holes, with the fixing screws correspondingly screwed into the corresponding threaded holes.

[0009] As a preferred embodiment of this utility model, a clamping assembly is provided on the right side of the end cap. The clamping assembly includes an outer sliding cylinder, which is fixedly installed on the right side of the end cap. A spring is fixedly installed on the right side of the end cap.

[0010] As a preferred embodiment of this utility model, an inner slide cylinder is fixedly installed on the left side of the ratchet disc, the inner slide cylinder is slidably installed on the inner side of the outer slide cylinder, and the right side of the spring is in close contact with the left side of the ratchet disc.

[0011] As a preferred embodiment of this utility model, the meshing surfaces of the ratchet disc and the ratchet ring are tightly fitted without any obvious wobble or gap.

[0012] As a preferred embodiment of this utility model, the fitting accuracy between the inner and outer sliding cylinders meets the sliding guidance requirements, the inner sliding cylinder slides without jamming when inside the outer sliding cylinder, and the fixed connection method between the inner sliding cylinder and the ratchet disc must ensure the connection strength between the two to avoid relative displacement during torque transmission.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. In this utility model, the ratchet disc and ratchet ring are always kept in a tight meshing state by the clamping component, which effectively eliminates the wobbling gap between the two, avoids impact and abnormal noise during torque transmission, and can automatically compensate for wear gaps that occur during long-term operation, ensuring the stability, continuity and reliability of torque transmission.

[0014] 2. In this utility model, the ratchet disc enables the external driving force to be transmitted in one direction through its engagement with the ratchet ring. When the driven end speed exceeds that of the driving end, it can disengage from the ratchet ring to form an overrunning state, thus preventing the power from the driven end from being transmitted in reverse to the driving end, protecting the transmission components from reverse torque impact, and extending the service life of the system. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external structure of an embodiment of the present utility model.

[0016] Figure 2 This is a side view structural diagram of an embodiment of the present utility model.

[0017] Figure 3 This is an embodiment of the present utility model. Figure 2 Enlarged view of the structure at point A in the middle.

[0018] Figure 4 This is an exploded structural front view of an embodiment of this utility model.

[0019] Figure 5 This is an exploded structural side view of an embodiment of the present invention.

[0020] In the diagram: 1. Outer shell; 2. End cap; 3. Clutch flywheel; 4. Threaded hole; 5. Driven connecting shaft; 6. Fixing screw; 7. Through hole; 8. Clamping assembly; 81. Outer slide cylinder; 82. Spring; 83. Inner slide cylinder; 9. Ratchet disc; 10. Connecting seat; 11. Ratchet ring. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0022] In this embodiment, please refer to Figures 1 to 5This utility model provides a technical solution: a unidirectional high-torque overrunning clutch for a 145kV vacuum circuit breaker, including a housing 1, a ratchet ring 11 fixedly installed on the inner side of the housing 1 with the gear face of the ratchet ring 11 facing the left side, a connecting seat 10 provided on the inner side of the housing 1, a ratchet disc 9 fixedly installed on the left side of the connecting seat 10 with the gear face of the ratchet disc 9 facing the right side, the ratchet disc 9 meshing with a through hole 7, a through hole 7 provided in the center of the right side of the housing 1, a clutch flywheel 3 fixedly installed in the center of the right side of the connecting seat 10, the clutch flywheel 3 inserted into the inside of the through hole 7, an end cover 2 provided on the left side of the housing 1, a driven connecting shaft 5 provided in the center of the left side of the end cover 2, a plurality of fixing screws 6 threaded through the inside of the end cover 2, a plurality of threaded holes 4 provided on the left side of the housing 1, the fixing screws 6 being correspondingly threaded into the inside of the corresponding threaded holes 4. The outer casing 1 serves as the basic mounting and protective carrier for the entire clutch. A ratchet ring 11 is installed on its inner side by welding or bolting, with the gear surface of the ratchet ring 11 facing to the left. At the same time, a connecting seat 10 for connecting the active component is also provided on the inner side of the outer casing 1. A ratchet disc 9 is installed on the left side of the connecting seat 10 by integral molding or detachable fixing, with the gear surface of the ratchet disc 9 facing to the right. The gear surfaces of the two are opposite to each other, which just form a meshing core transmission structure. The external active power first acts on the clutch flywheel 3, which is fixedly connected to the right side of the connecting seat 10. The clutch flywheel 3 starts to rotate under the power drive, which in turn drives the connecting seat 10, which is fixed to it, to rotate synchronously. The connecting seat 10 then drives the ratchet disc 9 on the left side to rotate together. At this time, since the ratchet disc 9 and the ratchet ring 11 are in an engaging state, as the ratchet disc 9 rotates, its teeth engage with the teeth of the ratchet ring 11. Utilizing the unique one-way locking characteristic of the ratchet structure, torque is transmitted from the ratchet disc 9 to the ratchet ring 11, and then from the ratchet ring 11 to the housing 1 fixed thereto. An end cover 2 is located on the left side of the housing 1. The end cover 2 is connected to the housing 1 by multiple fixing screws 6. The end cover 2 has through holes adapted to the fixing screws 6. After the fixing screws 6 pass through these through holes, they are screwed into the corresponding threaded holes 4 pre-set on the left side of the housing 1, thus firmly fixing the end cover 2 to the housing 1. A driven connecting shaft 5 for connecting the driven component is also located in the center of the left side of the end cover 2. When the housing 1 rotates under torque, the end cover 2 rotates synchronously with the housing 1, thereby driving the driven connecting shaft 5 to rotate, ultimately transmitting torque to the driven component of the 145kV vacuum circuit breaker, completing the one-way power transmission process.

[0023] In this embodiment, such as Figures 1 to 5As shown, a clamping assembly 8 is provided on the right side of the end cover 2. The clamping assembly 8 includes an outer slide cylinder 81, which is fixedly installed on the right side of the end cover 2. A spring 82 is fixedly installed on the right side of the end cover 2. An inner slide cylinder 83 is fixedly installed on the left side of the ratchet disc 9. The inner slide cylinder 83 is slidably installed inside the outer slide cylinder 81. The right side of the spring 82 is close to the left side of the ratchet disc 9. The meshing surfaces of the ratchet disc 9 and the ratchet ring 11 are tightly fitted without obvious wobble or gap. The fitting accuracy between the inner slide cylinder 83 and the outer slide cylinder 81 meets the sliding guide requirements. There is no jamming when the inner slide cylinder 83 slides inside the outer slide cylinder 81. The fixed connection method between the inner slide cylinder 83 and the ratchet disc 9 must ensure the connection strength of the two and avoid relative displacement during torque transmission. The clamping assembly 8 located on the right side of the end cover 2 is a key structure ensuring stable engagement between the ratchet disc 9 and the ratchet ring 11. The clamping assembly 8 mainly consists of an outer slide cylinder 81, a spring 82, and an inner slide cylinder 83. These three components work together to achieve axial clamping and guiding of the ratchet disc 9. The outer slide cylinder 81 is installed on the right side of the end cover 2 by welding or bolting. The inner wall of the outer slide cylinder 81 is precision machined, resulting in a smooth surface and high straightness, providing a good foundation for the subsequent sliding of the inner slide cylinder 83. The inner slide cylinder 83 is fixedly installed on the left side of the ratchet disc 9. The outer side wall of the inner slide cylinder 83 is adapted to the inner side wall of the outer slide cylinder 81. The inner slide cylinder 83 is slidably assembled on the inner side of the outer slide cylinder 81 to form a stable sliding fit structure. This structure can provide precise guidance for the axial movement of the ratchet disc 9, limit the radial movement of the ratchet disc 9, prevent the ratchet disc 9 from radially deviating or shaking during movement, and ensure that the teeth of the ratchet disc 9 can always be precisely aligned with the teeth of the ratchet ring 11, creating conditions for stable meshing between the two. A spring 82 is also fixedly installed on the right side of the end cover 2. When the clutch is not running, the spring 82 is in a naturally extended state, with its right end face tightly pressed against the left side of the ratchet disc 9, continuously applying elastic pressure to the right on the ratchet disc 9. This ensures that the ratchet disc 9 always tends to move to the right, thereby maintaining a tight fit between the meshing surfaces of the ratchet disc 9 and the ratchet ring 11. This completely eliminates any potential wobble gaps between them, preventing impacts or abnormal noises caused by gaps during torque transmission and ensuring the smoothness and continuity of torque transmission. During long-term operation of the clutch, if a slight gap appears between the ratchet disc 9 and the ratchet ring 11 due to factors such as equipment vibration or normal wear of the gear teeth, the spring 82 will immediately compensate for the gap through its own elastic deformation. The spring 82 will further extend and push the ratchet disc 9 to the right until the ratchet disc 9 is tightly pressed against the ratchet ring 11 again, ensuring that the meshing state of the two is not disrupted. In addition, the inner slide cylinder 83 and the ratchet disc 9 are fixed by full welding or high-strength bolt connection. This connection method can significantly improve the connection strength between the two and ensure that the inner slide cylinder 83 and the ratchet disc 9 always remain relatively stationary during torque transmission, and there will be no relative displacement or loosening of the connection.Meanwhile, the sliding fit precision of the outer slide cylinder 81 and the inner slide cylinder 83 is strictly controlled, and the fit gap between the two is precisely calculated to ensure that the inner slide cylinder 83 will not get stuck when sliding inside the outer slide cylinder 81.

[0024] Working principle: First, taking the outer shell 1 as the basic carrier, the ratchet ring 11 fixed inside it and the ratchet disc 9 on the left side of the connecting seat 10 form a core meshing structure. The end cover 2 is screwed to the outer shell 1 by the fixing screw 6. The clamping assembly 8 on the right side of the end cover 2 includes an outer slide cylinder 81, a spring 82, and an inner slide cylinder 83. The inner slide cylinder 83 is fixed to the ratchet disc 9 and slidably assembled inside the outer slide cylinder 81. The spring 82 continuously applies rightward pressure to the ratchet disc 9 to ensure that it is tightly meshed with the ratchet ring 11. When power needs to be transmitted, the external active force acts on the clutch flywheel 3 on the right side of the connecting seat 10, driving the connecting seat 10 and the ratchet disc 9 to rotate synchronously. The torque is transmitted through the meshing ratchet disc 9 and the ratchet ring. The power is transmitted from ring 11 to housing 1, and then from driven connecting shaft 5 on the left side of end cover 2 to driven component of 145kV vacuum circuit breaker, completing unidirectional power transmission. If the driven end speed exceeds that of the driving end, the speed difference causes ratchet disc 9 to disengage from ratchet ring 11 and enter overrunning state, preventing reverse power transmission. During long-term operation, if meshing gaps occur due to vibration or wear, spring 82 pushes ratchet disc 9 to compensate for the gaps through elastic deformation. The precise cooperation between inner slide cylinder 83 and outer slide cylinder 81 ensures that ratchet disc 9 slides axially without jamming. The high-strength connection between inner slide cylinder 83 and ratchet disc 9 prevents relative displacement, jointly ensuring the stable operation of the clutch under 145kV vacuum circuit breaker conditions.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

A 1.145kV vacuum circuit breaker unidirectional high-torque overrunning clutch, comprising a housing (1), characterized in that, A ratchet ring (11) is fixedly installed on the inner side of the outer casing (1), with the gear face of the ratchet ring (11) facing to the left. A connecting seat (10) is provided on the inner side of the outer casing (1), and a ratchet disc (9) is fixedly installed on the left side of the connecting seat (10), with the gear face of the ratchet disc (9) facing to the right. The ratchet disc (9) meshes with the ratchet ring (11). A through hole (7) is provided in the center of the right side of the outer casing (1), and a clutch flywheel (3) is fixedly installed in the center of the right side of the connecting seat (10). The clutch flywheel (3) is inserted into the through hole (7). An end is provided on the left side of the outer casing (1). The end cap (2) has a clamping assembly (8) on its right side. The clamping assembly (8) includes an outer slide cylinder (81) which is fixedly installed on the right side of the end cap (2). A spring (82) is fixedly installed on the right side of the end cap (2). An inner slide cylinder (83) is fixedly installed on the left side of the ratchet disc (9). The inner slide cylinder (83) is slidably installed inside the outer slide cylinder (81). The right side of the spring (82) is close to the left side of the ratchet disc (9). The spring (82) continuously applies a rightward elastic pressure to the ratchet disc (9), so that the ratchet disc (9) and the ratchet ring (11) always maintain a tight engagement.

2. The unidirectional high-torque overrunning clutch for a 145kV vacuum circuit breaker according to claim 1, characterized in that, The end cap (2) is provided with a driven connecting shaft (5) in the center of the left side.

3. The unidirectional high-torque overrunning clutch for a 145kV vacuum circuit breaker according to claim 2, characterized in that, The end cap (2) has multiple fixing screws (6) threaded through its interior. The outer shell (1) has multiple threaded holes (4) on its left side, and the fixing screws (6) are threaded into the corresponding threaded holes (4).

4. The unidirectional high-torque overrunning clutch for a 145kV vacuum circuit breaker according to claim 1, characterized in that, The meshing surfaces of the ratchet disc (9) and the ratchet ring (11) fit tightly without any obvious wobble or gap.

5. The unidirectional high-torque overrunning clutch for a 145kV vacuum circuit breaker according to claim 1, characterized in that, The fitting accuracy of the inner slide cylinder (83) and the outer slide cylinder (81) meets the sliding guide requirements. The inner slide cylinder (83) slides inside the outer slide cylinder (81) without jamming. The fixed connection method between the inner slide cylinder (83) and the ratchet disk (9) must ensure the connection strength between the two to avoid relative displacement during torque transmission.

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