A circuit breaker spring operating mechanism

Abstract

The present invention belongs to the technical field of circuit breakers, and provides a circuit breaker spring operating mechanism, including: two separately arranged connecting plates, one of which is used to connect with a lock shaft, and the other is used to connect with a crank arm, and a through hole group is provided on the connecting plate, and the through hole group includes a plurality of separately arranged through holes; two springs, the spiral directions of the two springs are opposite, one end of a spring is penetrated through a through hole of a connecting plate, and each spring is rotated relative to the hole wall of the corresponding through hole; an adjustment plate, respectively connected to the other end of each spring; a plurality of locking members, respectively connected to each end of each spring, so as to lock the spring to the connecting plate or the adjustment plate. The circuit breaker spring operating mechanism of the present invention can adjust the elastic properties of the spring to ensure the energy storage effect of the circuit breaker.

Description

Technical Field

[0001] The invention relates to the technical field of circuit breakers, and in particular to a spring operating mechanism of a circuit breaker. Background Art

[0002] Switchgear is an operating mechanism used in electrical equipment, mainly including a frame, a main shaft, a closing and opening assembly, an energy storage device, a buffer and an indication component. Usually, the circuit breaker operating mechanism includes manual operation and electric operation. Manual operation uses a handle to operate the input shaft to achieve energy storage and closing and opening after energy storage; electric operation uses a motor and a closing and opening button to achieve closing and opening after energy storage.

[0003] During the energy storage process, the energy storage spring will be stretched and recovered many times, so that after long-term use, the spring elasticity will decrease and the elastic performance will not meet the requirements. Summary of the invention

[0004] Based on this, it is necessary to provide a circuit breaker spring operating mechanism to address the problem of reduced elastic performance of current springs.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A circuit breaker spring operating mechanism, comprising:

[0007] Two separately arranged connecting plates, one of which is used to connect with the lock shaft, and the other is used to connect with the crank arm, the connecting plates are provided with a through hole group, and the through hole group includes a plurality of separately arranged through holes;

[0008] Two springs, the spiral directions of the two springs are opposite, one end of one of the springs is inserted into a through hole of one of the connecting plates, and each of the springs is rotatably arranged relative to the hole wall of the corresponding through hole;

[0009] an adjusting plate, connected to the other end of each of the springs;

[0010] A plurality of locking members are respectively connected to each end of each of the springs to lock the springs on the connecting plate or the adjusting plate.

[0011] Furthermore, the circuit breaker spring operating mechanism also includes a plurality of one-way bearings, which are mounted on the hole wall of the through hole and sleeved outside the spring to provide rotation for the spring.

[0012] Furthermore, the circuit breaker spring operating mechanism also includes a plurality of limit plates, which are connected to the connecting plate and abut against the one-way bearing to limit the installation of the one-way bearing.

[0013] Furthermore, the locking member is a retaining spring.

[0014] Furthermore, a plurality of slots are provided on the spring in a spiral direction, and the slots are used for the locking member to be locked.

[0015] Furthermore, the circuit breaker spring operating mechanism also includes at least one buffer rod, at least one first buffer pad and at least one second buffer pad, at least one connecting plate is provided with the first buffer pad toward the center direction of the spring, one end of the buffer rod is connected to the adjustment plate, and the other end is provided with the second buffer pad, and the second buffer pad and the first buffer pad are arranged opposite to each other.

[0016] Furthermore, a mounting column is provided on the connecting plate, and the mounting column is used for mounting the first buffer pad.

[0017] Furthermore, the buffer rod and the adjustment plate are threadedly connected.

[0018] Furthermore, a nut is provided on the adjustment plate, and the buffer rod and the nut are threadedly connected.

[0019] Furthermore, the connecting plate is provided with two penetration hole groups, and the two penetration hole groups are separated and arranged along the radial direction of the spring.

[0020] The beneficial effects of the present invention are:

[0021] The present invention provides two springs with opposite rotation directions, each spring is slidably arranged relative to a connecting plate, and the two springs are connected by an adjusting plate. Each spring is locked on the connecting plate or the adjusting plate by a locking piece. In this way, when the elastic force of the spring is insufficient after long-term use, the locking piece on the spring connected to the connecting plate is removed, and the two springs are rotated by driving the adjusting plate to make the springs rotate relative to the corresponding connecting plates, so that the ends of each spring that are away from each other move in a direction away from the adjusting plate, thereby adjusting the tightness of the two springs to achieve the effect of adjusting the size of the elastic force, thereby ensuring the energy storage performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of a circuit breaker according to an embodiment of the present invention;

[0023] Figure 2 is a three-dimensional schematic diagram of a spring operating mechanism according to an embodiment of the present invention;

[0024] Figure 3 for Figure 2 The enlarged schematic diagram of point Ⅰ in the middle;

[0025] Figure 4 for Figure 2 The enlarged schematic diagram of the middle II;

[0026] Figure 5 for Figure 2 A schematic diagram of the structure of the spring operating mechanism;

[0027] Figure 6 for Figure 5 A schematic cross-sectional view of the spring operating mechanism along the AA direction;

[0028] Figure 7 for Figure 6 The enlarged schematic diagram of point III in the middle;

[0029] Figure 8 for Figure 5 Schematic diagram of the cross-section of the spring operating mechanism along the BB direction.

[0030] in:

[0031] 100. Spring operating mechanism of circuit breaker; 10. Connecting plate; 11. Through hole group; 12. Through hole; 13. Mounting column; 14. Rotating shaft; 20. Spring; 21. Slot; 30. Adjusting plate; 31. Connecting hole; 32. Adjusting ear; 40. Locking piece; 41. Notch; 50. One-way bearing; 51. Sliding ring; 52. Ball; 53. Stop ring; 60. Limiting plate; 61. Main board; 62. Supporting ring; 70. Buffer rod; 80. First buffer pad; 90. Second buffer pad; 200. Nut; 300. Circuit breaker. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is 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 a limitation to the present invention.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] See also Figures 1 to 8 The circuit breaker spring operating mechanism 100 provided in the embodiment of the present invention comprises two separately arranged connecting plates 10, two springs 20, an adjusting plate 30 and a plurality of locking members 40. Figure 1 It is a structural schematic diagram of a circuit breaker spring operating mechanism 100 installed on a circuit breaker 300 .

[0036] Among them, see Figures 1 to 5 , one of the two separately arranged connecting plates 10 is used for rotationally connecting with the lock shaft, and the other is used for connecting with the crank arm. Specifically, the connecting plate 10 is rotationally connected with the crank arm through the rotating shaft 14, and a through hole group 11 is provided on the connecting plate 10, and the through hole group 11 includes a plurality of separately arranged through holes 12; the spiral directions of the two springs 20 are opposite, one end of each spring 20 is penetrated by a through hole group 11 of the connecting plate 10, and each spring 20 is rotatably arranged relative to the hole wall of the corresponding through hole 12; an adjusting plate 30, each end of the adjusting plate 30 is respectively connected to the other end of each spring 20; a plurality of locking members 40 are respectively connected to each end of each spring 20 to lock the spring 20 to the connecting plate 10 or the adjusting plate 30.

[0037] The circuit breaker elastic operating mechanism 100 is provided with two springs 20 with opposite rotation directions, each spring 20 is slidably arranged relative to a connecting plate 10, and the two springs 20 are connected by an adjusting plate 30, and each spring 20 is locked on the connecting plate 10 or the adjusting plate 30 by a locking member 40. In this way, when the elastic force of the spring 20 is insufficient after long-term use, the locking member 40 on the spring 20 connected to the connecting plate 10 is removed, and the two springs 20 are rotated by driving the adjusting plate 30, so that the springs 20 are rotated relative to the corresponding connecting plate 10, so that the ends of each spring 20 that are away from each other move in a direction away from the adjusting plate 30, thereby adjusting the tightness of the two springs 20 to achieve the effect of adjusting the elastic force, thereby ensuring the energy storage performance.

[0038] It can be understood that since the spring 20 needs to be fixed after being rotated relative to the connecting plate 10, a plurality of through holes 12 for the spring 20 to pass through are provided on the connecting plate 10. Specifically, in order to ensure the stability of the spring 20 after being fixed, two through hole groups 11 are provided on the connecting plate 10 along the radial direction of the spring 20, and each through hole group 11 includes a plurality of through holes 12 spaced apart and arranged along the axial direction of the spring 20, for example Figure 8 As shown, the penetration holes 12 are used for the springs 20 to be penetrated (that is, some may have been penetrated by the springs 20, and some are used as reserves). Furthermore, after long-term use and adjustment of the springs 20, the springs 20 can be located in at least two penetration holes 12, so that the springs 20 have at least two connection points on the connecting plate 10, ensuring the balance of the springs 20 when stretching and storing energy, that is, ensuring the stability of the force.

[0039] Among them, Figure 5 As shown, since the spiral spring 20 needs to be avoided, a through hole 12 on the edge of the connecting plate 10, that is, a through hole 12 close to the center direction of the spring 20, is provided to connect to the notch on the edge of the connecting plate 10, so that the spring 20 can be located in the through hole 12, and the spring 20 can be gradually passed through other through holes 12 in sequence in a direction away from its own center.

[0040] For further information, see Figure 8 When the adjusting plate 30 is connected to the spring 20, two connecting holes 31 are provided on the adjusting plate 30 for connecting each spring 20, so that one end of each spring 20 has two connecting points, thereby ensuring the stability of the spring 20 during stretching.

[0041] See also Figure 3 , Figure 6 and Figure 7 In one embodiment of the present invention, in order to ensure smoothness when the spring 20 is slidably adjusted relative to the connecting plate 10, the circuit breaker spring operating mechanism 100 further includes a plurality of one-way bearings 50, which are mounted on the hole wall of the through hole 12 and sleeved outside the spring 20 for allowing the spring 20 to rotate. In this way, when it is necessary to rotate the spring 20 relative to the connecting plate 10, due to the provision of the one-way bearing 50, the spring 20 rotates relative to the one-way bearing 50, which reduces the friction of the spring 20 during rotation adjustment compared to the method of directly rotating relative to the hole wall of the through hole 12, thereby facilitating precise adjustment of the length of the spring 20.

[0042] The structure of the one-way bearing 50 of this embodiment is as follows: Figure 7As shown, it includes a sliding ring 51, a ball 52 and a stop ring 53. When the elastic force of the spring 20 is adjusted, the spring 20 contacts the ball 52. When the spring 20 moves, it has rolling friction with the ball 52. The ball 52 rotates relative to the sliding ring 51, thereby realizing the adjustment of the spring 20. When the spring 20 moves in the reverse direction, it cannot move in the reverse direction due to the large friction resistance with the stop ring 53, thereby realizing the locking of the spring 20. At the same time, the locking of the locking member 40 is synchronized to ensure the stability of the spring 20 when locked.

[0043] It can be understood that a one-way bearing 50 can be provided on the hole wall of each through hole 12 .

[0044] Among them, see Figure 1 , Figure 2 , Figure 5 and Figure 7 In order to facilitate the installation of the one-way bearing 50, the circuit breaker spring operating mechanism 100 also includes a plurality of limit plates 60, which are connected to the connecting plate 10 and abut against the one-way bearing 50 to limit the installation of the one-way bearing 50, so as to install the one-way bearing 50 in the penetration hole 12 to prevent the one-way bearing 50 from shifting or falling off relative to the connecting plate 10. It can be understood that the spring 20 is also penetrated by the limit plate 60, and a plurality of through holes are provided on the limit plate 60, and one through hole and one penetration hole 12 are correspondingly arranged.

[0045] Specifically, a limiting plate 60 is provided on each side of the connecting plate 10. The limiting plate 60 includes a main plate 61 and a supporting ring 62 provided on the main plate 61, and the supporting ring 62 extends into the penetration hole 12, and the two supporting rings 62 on both sides are supported by the one-way bearing 50, so that the one-way bearing 50 is clamped in the penetration hole 12, so as to realize the installation of the one-way bearing 50.

[0046] See also Figure 3 and Figure 4 , is a schematic diagram of the structure of a locking member 40 according to an embodiment of the present invention. The locking member 40 of this embodiment is a retaining spring, and an axial notch 41 is provided on the annular wall of the retaining spring. After the spring 20 is installed and adjusted into place, the retaining spring is deformed by an external force and clamped on the spring 20, and fits against the limiting plate 60, thereby locking and limiting the position of the spring 20 to prevent movement during subsequent use. By setting it as a retaining spring, the locking of the spring can be quickly operated.

[0047] In order to facilitate the fixing of the position of the spring 20 on the connecting plate 10 and / or the adjusting plate 30 respectively and avoid the spring 20 slipping after the locking member 40 locks the spring 20, a plurality of slots 21 are arranged on the spring 20 along the spiral direction, and the slots 21 are used for the locking member 40 to be clamped. In this way, by providing the slots 21 on the spring 20, when the spring 20 is locked by the locking member 40, the locking member 40 is clamped in the slots 21, avoiding the spring 20 slipping relative to the connecting plate 10 or the adjusting plate 30 when the spring 20 is stretched; further, by providing the slots 21 to cooperate with the retaining spring, the slots 21 are arranged on the surface of the spring 20, which can facilitate the opening of the slots 21 and ensure the structural strength of the spring 20.

[0048] It can be understood that since the end of the spring 20 connected to the connecting plate 10 will gradually rotate relative to the connecting plate 10, the end of the spring 20 connected to the connecting plate 10 is provided with a plurality of slots 21 with a high density. Since the end of the spring 20 connected to the adjusting plate 30 has two fixed connection points, the end of the spring 20 connected to the adjusting plate 30 is provided with two slots 21.

[0049] See also Figure 2 , Figure 5 and Figure 8 In one embodiment of the present invention, in order to facilitate the adjustment plate 30 to drive the spring 20 to rotate relative to the connecting plate 10, an adjustment ear 32 is provided on the adjustment plate 30, so that the hand can drive the adjustment ear 32 to have a larger contact surface with the adjustment plate 30, thereby facilitating the rotation of the adjustment plate 30 to drive the spring 20 to rotate relative to the connecting plate 10.

[0050] In this embodiment, two adjusting ears 32 are provided on the adjusting plate 30, so that one adjusting ear 32 can be driven by one hand.

[0051] Among them, since the circuit breaker 300 is in the process of continuous closing and opening, the spring 20 will retract and rebound after stretching and storing energy. The elastic force has a very fast release speed, which will cause impact to the entire device, and the spring 20 will vibrate briefly. The vibration of the spring 20 will cause material fatigue, noise pollution, reduced equipment accuracy, resonance risk, energy loss, shortened component life, unstable system operation and some safety hazards. Therefore, please refer to Figure 8In one embodiment of the present invention, the circuit breaker spring operating mechanism 100 further includes at least one buffer rod 70, at least one first buffer pad 80 and at least one second buffer pad 90. At least one connecting plate 10 is provided with a first buffer pad 80 toward the center direction of the spring 20. One end of the buffer rod 70 is connected to the adjusting plate 30, and the other end is provided with a second buffer pad 90. The second buffer pad 90 and the first buffer pad 80 are arranged opposite to each other. In this way, when the spring 20 releases the elastic force after the energy storage is completed, the first buffer pad 80 and the second buffer pad 90 are abutted against each other, thereby achieving the effect of buffering energy absorption and avoiding excessive vibration of the spring 20.

[0052] It can be understood that since the circuit breaker spring operating mechanism 100 in this embodiment includes two springs 20, the circuit breaker spring operating mechanism 100 in this embodiment includes two buffer rods 70, two first buffer pads 80 and two second buffer pads 90. The adjustment plate 30 is provided with a buffer rod 70 on each side facing each spring 20, and each connecting plate 10 is provided with a first buffer pad 80, so that the first buffer pads 80 and the second buffer pads 90 that appear in pairs can contact each other to achieve the energy absorption effect.

[0053] Among them, see Figure 8 In order to facilitate the installation of the first buffer pad 80, a mounting column 13 is provided on the connecting plate 10, and the mounting column 13 is used to install the first buffer pad 80. Therefore, through the setting of the mounting column 13 on the connecting plate 10, a larger contact area with the first buffer pad 80 can be provided, which facilitates the installation of the first buffer pad 80 and ensures the installation stability of the first buffer pad 80.

[0054] Furthermore, as the spring 20 moves relative to the connecting plate 10 to adjust the elastic force, in order to ensure the contact buffering effect between the first buffer pad 80 and the second buffer pad 90, the buffer rod 70 and the adjustment plate 30 are threadedly connected, so that as the spring 20 is adjusted in extension and contraction, the buffer rod 70 can be twisted to drive the distance adjustment between the first buffer pad 80 and the second buffer pad 90, thereby ensuring that the first buffer pad 80 and the second buffer pad 90 can be in good contact, thereby achieving a shock absorbing effect.

[0055] It can be understood that in order to prevent the buffer rod 70 from loosening, a nut 200 is provided on the adjustment plate 30, and the nut 200 and the buffer rod 70 are threadedly connected. Through the setting of the nut 200, the connection area with the threaded section of the buffer rod 70 is increased, thereby achieving the effect of preventing the buffer rod 70 from loosening.

[0056] The above-mentioned circuit breaker spring operating mechanism 100 is used as follows: when the elastic force of the spring 20 weakens after long-term use and needs to be adjusted, the retaining spring for locking the spring 20 at the connecting plate 10 is removed, and the two springs 20 are driven to rotate relative to their respective connecting plates 10 through the adjusting plate 30. When the spring 20 is adjusted to the right position, the retaining spring is clamped in the corresponding slot 21 of the spring 20 to fix the position of the spring 20, that is, the elastic force adjustment of the two springs 20 is achieved.

[0057] The above-mentioned circuit breaker spring operating mechanism 100, by arranging two through hole groups 11 on the connecting plate 10, the two through hole groups 11 are arranged in a radially spaced relationship with the spring 20, so that the spring 20 has at least two connection points on the connecting plate 10, thereby ensuring the balance of the spring 20 during stretching and energy storage, that is, ensuring the stability of the force; by arranging a one-way bearing 50 for the spring 20 to rotate on the connecting plate 10, compared with the way in which the spring 20 directly rotates relative to the hole wall of the through hole 12, the friction force of the spring 20 during rotation adjustment is reduced, thereby facilitating the precise adjustment of the length adjustment of the spring 20; by arranging limit plates 60 on both sides of the connecting plate 10, the limit plates 60 install the one-way bearing 50 in the through hole 12, thereby preventing the one-way bearing 50 from rotating relative to the connecting plate 10 is displaced or falls off; by setting the locking member 40 as a retaining spring, the locking of the spring can be quickly operated; by providing a plurality of retaining grooves 21 along the spiral direction on the spring 20, when the spring 20 is locked by the locking member 40, the locking member 40 is stuck in the retaining groove 21, so as to avoid the spring 20 slipping relative to the connecting plate 10 or the adjusting plate 30 when the spring 20 is stretched; by providing an adjusting ear 32 on the adjusting plate 30, the driving operation of the hand is convenient; by arranging a pair of buffer pads between the connecting plate 10 and the adjusting plate, when the spring 20 releases the elastic force after the energy storage is completed, the first buffer pad 80 and the second buffer pad 90 are against each other, so as to achieve the effect of buffering and absorbing energy, and avoid excessive vibration of the spring 20.

[0058] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A circuit breaker spring operating mechanism (100), characterized in that: include: Two separately arranged connecting plates (10), one of which is used to connect to the lock shaft, and the other is used to connect to the crank arm, the connecting plate (10) is provided with a through hole group (11), and the through hole group (11) includes a plurality of separately arranged through holes (12); Two springs (20), the spiral directions of the two springs (20) are opposite, one end of one of the springs (20) is inserted into a through hole (12) of one of the connecting plates (10), and each of the springs (20) is rotatably arranged relative to the hole wall of the corresponding through hole (12); an adjustment plate (30) connected to the other end of each of the springs (20); A plurality of locking members (40) are respectively connected to each end of each of the springs (20) to lock the springs (20) to the connecting plate (10) or the adjusting plate (30); The circuit breaker spring operating mechanism (100) further comprises at least one buffer rod (70), at least one first buffer pad (80) and at least one second buffer pad (90); at least one of the connecting plates (10) is provided with the first buffer pad (80) in a direction toward the center of the spring (20); one end of the buffer rod (70) is connected to the adjustment plate (30) and the other end is provided with the second buffer pad (90); the second buffer pad (90) and the first buffer pad (80) are arranged opposite to each other.

2. The circuit breaker spring operating mechanism (100) according to claim 1, characterized in that: The circuit breaker spring operating mechanism (100) further comprises a plurality of one-way bearings (50), wherein the one-way bearings (50) are mounted on the hole wall of the penetration hole (12) and sleeved outside the spring (20) for allowing the spring (20) to rotate.

3. The circuit breaker spring operating mechanism (100) according to claim 2, characterized in that: The circuit breaker spring operating mechanism (100) further comprises a plurality of limit plates (60), wherein the limit plates (60) are connected to the connecting plate (10) and abut against the one-way bearing (50) to limit the installation of the one-way bearing (50).

4. The circuit breaker spring operating mechanism (100) according to any one of claims 1 to 3, characterized in that: The locking member (40) is a clip spring.

5. The circuit breaker spring operating mechanism (100) according to any one of claims 1 to 3, characterized in that: The spring (20) is provided with a plurality of slots (21) spaced apart along the spiral direction, and the slots (21) are used for the locking member (40) to be locked.

6. The circuit breaker spring operating mechanism (100) according to claim 1, characterized in that: A mounting post (13) is provided on the connecting plate (10), and the mounting post (13) is used to mount the first buffer pad (80).

7. The circuit breaker spring operating mechanism (100) according to claim 1, characterized in that: The buffer rod (70) and the adjustment plate (30) are threadedly connected.

8. The circuit breaker spring operating mechanism (100) according to claim 7, characterized in that: The adjustment plate (30) is provided with a nut (200), and the buffer rod (70) and the nut (200) are threadedly connected.

9. The circuit breaker spring operating mechanism (100) according to any one of claims 1 to 3, characterized in that: The connecting plate (10) is provided with two penetration hole groups (11), and the two penetration hole groups (11) are arranged separately along the radial direction of the spring (20).

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