External manual operating device for circuit breaker

Abstract

The present invention discloses an external manual operating device for a circuit breaker, comprising a mounting base and a knob; the knob is mounted on the upper portion of the mounting base and rotates to switch between an open state position and a closed state position; the inner end of the knob has a connecting structure for connecting a linkage shaft; the mounting base has a socket for the linkage shaft to pass through, and also includes a locking structure for locking the knob in the open state position; the mounting base has a first rotating block connected to the knob and maintaining synchronous rotation; the first rotating block has an interference portion; a first buffer component and a second buffer component are installed in the mounting base on the rotation path of the interference portion; when the knob is rotated to the open state position, the interference portion on the first rotating block interferes with the first buffer component; when the knob is rotated to the closed state position, the interference portion on the first rotating block interferes with the second buffer component. The present invention has a reasonable structure, good durability, and good use effect.

Description

Technical Field

[0001] The invention relates to an external manual operating device for a circuit breaker, belonging to the technical field of circuit breaker opening and closing control. Background Art

[0002] Manual operating devices, as accessories for wiring circuit breakers, are usually installed on the switch cabinet door. They are used to perform closing, opening, and interlocking operations on the circuit breaker installed inside the cabinet door from outside the cabinet door. The manual operating device is usually equipped with a knob. The operator rotates the knob outside the cabinet body, which in turn drives the interlocking mechanism through the linkage shaft to transmit a series of forces and drive the circuit breaker. When using existing manual operating devices, the operator usually applies a lot of force. When the knob is rotated to the open state position / closed state position, the limit part on the knob directly collides with the corresponding stop part on the mounting base and stops. The disadvantage of this design is that after long-term and frequent use, the parts that collide with each other are prone to deformation or fracture, which can cause the manual operating device to fail. Summary of the Invention

[0003] Therefore, the present invention aims to provide an external manual operating device for a circuit breaker with good durability.

[0004] The technical solution for achieving the purpose of the present invention is:

[0005] An external manual operating device for a circuit breaker, comprising a mounting base and a knob;

[0006] The knob is mounted on the upper portion of the mounting base and is rotatably switched between an open state position and a closed state position. The inner end of the knob has a connecting structure for connecting a linkage shaft. The mounting base has a socket for the linkage shaft to pass through, and also includes a locking structure for locking the knob in the open state position.

[0007] The mounting seat includes a first rotating block connected to the knob and rotating synchronously therewith. The first rotating block includes a resistance portion. A first buffer component and a second buffer component are installed on the rotation path of the resistance portion in the mounting seat. When the knob is rotated to the open state position, the resistance portion on the first rotating block resists the first buffer component. When the knob is rotated to the closed state position, the resistance portion on the first rotating block resists the second buffer component.

[0008] In the above technical solution, the first buffer component and the second buffer component are helical compression springs.

[0009] In the above technical solution, the mounting seat has a first card slot and a second card slot, the first end of the first buffer component is clamped in the first card slot, and the first end of the second buffer component is clamped in the second card slot;

[0010] When the knob is rotated to the open state position, the interference portion on the first rotating block interferes with the second end of the first buffer component; when the knob is rotated to the closed state position, the interference portion on the first rotating block interferes with the second end of the second buffer component.

[0011] In the above technical solution, the locking structure includes a locking rod installed in the mounting hole on the knob, a first elastic component that provides an upward elastic force for the locking rod, and a lock hole correspondingly arranged on the mounting seat. Under normal circumstances, the locking rod is in the mounting hole under the action of the first elastic component, and a padlock hole is provided on the top of the mounting hole on the knob. When the knob is in the open state, the locking rod and the lock hole, by applying downward pressure to the locking rod, move the locking rod downward and insert into the lock hole. At this time, a padlock is provided in the padlock hole to limit the upward movement of the locking rod, thereby locking the knob.

[0012] In the above technical solution, the first elastic component is a helical compression spring.

[0013] The locking lever is secured to a position adjacent to the first spring and secured to the second spring when the cam is in a closed position.

[0014] In the above technical solution, the second elastic component is a helical compression spring sleeved on the limiting rod, with upper and lower ends respectively resting on the knob and the limiting rod.

[0015] In the above technical solution, the mounting seat is composed of a base and a cover, the first rotating block is arranged between the base and the cover, the first buffer component and the second buffer component are installed inside the cover, and the knob is installed on the outside of the cover.

[0016] In the above technical solution, a locking sleeve is screwed onto the bottom of the mounting seat at a position corresponding to the jack. The locking sleeve has a through hole for the linkage shaft to pass through, and the lower end of the through hole is trumpet-shaped.

[0017] In the above technical solution, the connecting structure is a square hole, and the cross-sectional shape of the end of the linkage shaft that is plugged into the square hole is a matching square.

[0018] In the above technical solution, the rotatable angle of the knob is greater than the angle between the open state position and the closed state position.

[0019] The present invention has positive effects: adopting the structure of the present invention, when operating, by rotating the knob, the rotation of the knob drives the first rotating block to rotate, and when the knob is rotated to a position close to the open state position or the closed state position, the interference portion on the first rotating block will contact the first buffer component or the second buffer component and play a buffering role through the compression of the buffer component, avoiding direct collision between the first rotating block and the mounting seat, thereby enhancing the service life of the components and enhancing the durability of the hand-operated device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of the hand-operated device of the present invention;

[0021] Figure 2 for Figure 1 The structure diagram of the hand-operated device shown is after omitting some components;

[0022] Figure 3 for Figure 1 An exploded view of the hand-operated device shown;

[0023] Figure 4 This is a schematic diagram of the structure of the hand-operated device of the present invention without the knob;

[0024] Figure 5 for Figure 4 Schematic diagram of the structure when the second rotating block is moved away;

[0025] Figure 6 Schematic diagram of the structure of the face cover of the present invention;

[0026] Figure 7 Schematic diagram of the structure of the first rotating block in the present invention;

[0027] Figure 8 Schematic diagram of the structure of the locking sleeve in the present invention;

[0028] Figure 9 Schematic diagram of the structure of the knob in the present invention.

[0029] The reference numerals shown in the figure are: 1-mounting seat; 11-jack; 12-first card slot; 13-second card slot; 14-first limiting protrusion; 15-second limiting protrusion; 16-base; 17-cover; 18-locking sleeve; 181-through hole; 19-locking hole; 2-knob; 20-square hole; 21-mounting hole; 22-padlock hole; 3-first rotating block; 31-interference part; 4-first buffer component; 5-second buffer component; 6-locking rod; 7-first elastic component; 8-second rotating block; 81-first through hole; 82-second through hole; 9-limiting rod; 10-second elastic component. DETAILED DESCRIPTION

[0030] The specific structure of the hand-operated device of the present invention is described below with reference to the accompanying drawings:

[0031] An external manual operating device for a circuit breaker, such as Figures 1 to 9 As shown, it includes a mounting base 1 and a knob 2; the knob 2 is mounted on the upper part of the mounting base 1 and rotates and switches between the open state position and the closed state position, the inner end of the knob 2 has a connecting structure for connecting the linkage shaft, and the mounting base 1 has a socket 11 for the linkage shaft to pass through, and the hand-operated device also includes a locking structure for locking the knob 2 in the open state position; the mounting base 1 has a first rotating block 3 connected to the knob 2 (by screws) and maintaining synchronous rotation, the first rotating block 3 has a resistance portion 31, and the mounting base 1 is provided with a first buffer component 4 and a second buffer component 5 on the rotation path of the resistance portion 31. When the knob 2 is rotated to the open state position, the resistance portion 31 on the first rotating block 3 resists the first buffer component 4, and when the knob 2 is rotated to the closed state position, the resistance portion 31 on the first rotating block 3 resists the second buffer component 5. By adopting the above-mentioned structure of the present invention, when installed and used, when the knob 2 is in the open state position, the circuit breaker is in the open state, and when the knob 2 is in the closed state position, the circuit breaker is in the closed state; when operating, by rotating the knob 2, the rotation of the knob 2 drives the first rotating block 3 to rotate, and when the knob 2 is rotated to a position close to the open state position or the closed state position, the resistance part 31 on the first rotating block 3 will contact the first buffer component 4 or the second buffer component 5 and play a buffering role through the compression of the buffer component, avoiding direct collision between the first rotating block 3 and the mounting base 1, thereby extending the service life of the components and enhancing the durability of the hand-operated device; when rotating, the knob 2 drives the handle of the circuit breaker to rotate through the linkage shaft (or the linkage component including the linkage shaft).

[0032] As an optimized design, in this embodiment, the rotatable angle of the knob 2 is greater than the angle between the open state position and the closed state position. With the above-mentioned structural design, when installing and using, the knob 2 is rotated by hand to the open state position or the closed state position, and the appropriate transition rotation is performed to ensure that the knob 2 drives the circuit breaker handle to partially close and close in place, thereby ensuring the reliability of the circuit breaker opening and closing. After the hand leaves the knob 2, the knob 2 rebounds to the open state position or the closed state position under the elastic force of the first buffer component 4 and the second buffer component 5; usually the angle between the open state position and the closed state position is 90 degrees, and the actual setting of the rotatable angle of the knob is greater than 90 degrees, such as 95 degrees.

[0033] In this embodiment, the first buffer component 4 and the second buffer component 5 are helical compression springs. In actual operation, the first buffer component 4 and the second buffer component 5 can also be made of other elastic materials, such as rubber blocks or sponge blocks. Of course, elastic components (the elastic components contain at least one elastic material) can also be used.

[0034] As a further improvement of the present invention, the mounting base 1 has a first card slot 12 and a second card slot 13, the first end of the first buffer component 4 is clamped in the first card slot 12, and the first end of the second buffer component 5 is clamped in the second card slot 13; when the knob 2 is rotated to the open state position, the contact portion 31 on the first rotating block 3 contacts the second end of the first buffer component 4 to achieve buffering, and when the knob 2 is rotated to the closed state position, the contact portion 31 on the first rotating block 3 contacts the second end of the second buffer component 5 to achieve buffering. For details, please refer to Figure 2 and Figure 3 .

[0035] Combine Figures 3 to 5 When the knob 2 is in the off-state position, the locking rod 6 is aligned with the lock hole 19, and downward pressure is applied to the locking rod 6 to move the locking rod 6 downward and insert the lock hole 19. At this time, a padlock is provided in the padlock hole 22 to restrict the locking rod 6 from moving upward, thereby locking the knob 2. When unlocking, the padlock is removed from the padlock hole, and the locking rod 6 bounces upward under the elastic force of the first elastic component 7, so that the lower end of the locking rod 6 withdraws from the lock hole 19 to release the lock. After the lock is released, the knob 2 can be rotated.

[0036] More specifically, the first elastic component 7 is a helical compression spring.

[0037] As a further improvement of the above embodiment, a second rotating block 8 that keeps synchronous rotation with the knob 2 is rotatably provided between the mounting seat 1 and the knob 2, and the knob 2 is provided with a limit rod 9 that can move up and down and a second elastic component 10 that provides a downward elastic force for the limit rod 9, the second rotating block 8 has a first through-hole 81 for the lower end of the limit rod 9 to pass through and a second through-hole 82 for the lower end of the locking rod 6 to pass through, the first elastic component 7 is sleeved on the locking rod 6, and its upper and lower ends respectively abut on the locking rod 6 and the second rotating block 8, and a first limiting protrusion 14 and a second limiting protrusion 15 are provided on the mounting seat 1 on the rotation path of the limit rod 9. Under normal circumstances, the lower end of the limit rod 9 abuts on the mounting seat 1 under the elastic force of the second elastic component 10, and when the knob 2 is in the opening state position and the closing state position respectively, the limit rod 9 abuts against the first limiting protrusion 14 and the second limiting protrusion 15 respectively to overcome the first buffer component 4 and the reverse force of the second buffer component 5 on the knob 2. When the hand-operated device is installed and used, during the process of rotating the knob 2 toward the opening state position / closing state position, the rotation of the knob 2 will drive the limiting rod 9 to pass over the first limiting protrusion 14 / the second limiting protrusion 15 (when the limiting rod 9 passes over the first limiting protrusion 14 / the second limiting protrusion 15, the limiting rod 9 will be subject to an upward force and rise to a certain extent. When the limiting rod 9 passes over the first limiting protrusion 14 / the second limiting protrusion 15, Under the action of the second elastic component 10, the limit rod 9 resets downward). When the knob 2 reaches the open state position / closed state position, the knob 2 is subjected to a reverse force due to the buffering effect of the first buffer component 4 / the second buffer component 5. The limit rod 9 and the first limit protrusion 14 / the second limit protrusion 15 interfere with each other to limit the knob 2, preventing the knob 2 from rotating in the opposite direction, temporarily locking the knob 2, and then reliably locking the knob 2 through the above-mentioned locking structure.

[0038] In this embodiment, the first limiting protrusion 14 and the second limiting protrusion 14 are in a triangular, semicircular, trapezoidal or other shape that is convenient for the limiting rod 9 to slide over.

[0039] In this embodiment, the second elastic component 10 is a helical compression spring sleeved on the limiting rod 9 , with upper and lower ends respectively resting on the knob 2 and the limiting rod 9 , thereby providing a downward elastic force for the limiting rod 9 .

[0040] In this embodiment, the mounting base 1 is composed of a base 16 and a surface cover 17, the first rotating block 3 is arranged between the base 16 and the surface cover 17, the first buffer component 4 and the second buffer component 5 are installed inside the surface cover 17, and the knob 2 is installed on the outside of the surface cover 17.

[0041] In this embodiment, a locking sleeve 18 is screwed to the position of the bottom of the mounting base 1 corresponding to the jack 11. The locking sleeve 18 has a through hole 181 for the linkage shaft to pass through. The lower end of the through hole 181 is trumpet-shaped. During installation, the locking sleeve 18 inside the cabinet is screwed to the bottom of the mounting base 1 outside the cabinet and is installed on the cabinet. The lower end of the through hole 181 is trumpet-shaped, which has a guiding function and facilitates the insertion of the end of the linkage shaft into the through hole 181.

[0042] In this embodiment, the connecting structure is a square hole 20, and the cross-sectional shape of one end of the linkage shaft that is plugged into the square hole 20 is a matching square. During installation and use, the end of the linkage shaft is inserted into the square hole to achieve connection, so that it can withstand a larger circumferential force to effectively drive the linkage shaft to rotate when the knob 2 is rotated.

[0043] It should be noted that the reason why the knob 2 is not locked in the closed position in the present invention is to drive the knob 2 to the open position when the circuit breaker trips due to circuit abnormalities such as overload or short circuit. The reason why the knob 2 is locked in the open position is to ensure that the controlled line is absolutely de-energized when the staff performs line maintenance, thereby ensuring the safety of the maintenance personnel.

[0044] Obviously, the above embodiments of the present invention are merely examples for the purpose of illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all embodiments here. However, obvious variations or modifications arising from the essence of the present invention remain within the scope of protection of the present invention.

Claims

1. An external manual operating device for a circuit breaker, comprising a mounting base (1) and a knob (2); The knob (2) is mounted on the upper portion of the mounting seat (1) and is rotatably switched between an open state position and a closed state position. The inner end of the knob (2) has a connecting structure for connecting a linkage shaft. The mounting seat (1) has a socket (11) for the linkage shaft to pass through, and also includes a locking structure for locking the knob (2) in the open state position. It is characterized by: The mounting seat (1) has a first rotating block (3) connected to the knob (2) and rotating synchronously, the first rotating block (3) has a contact portion (31), and a first buffer component (4) and a second buffer component (5) are installed on the rotation path of the contact portion (31) in the mounting seat (1); when the knob (2) is rotated to the open state position, the contact portion (31) on the first rotating block (3) contacts the first buffer component (4); when the knob (2) is rotated to the closed state position, the contact portion (31) on the first rotating block (3) contacts the second buffer component (5); the mounting seat (1) is composed of a base (16) and a cover (17) connected together; The locking structure comprises a locking rod (6) mounted in a mounting hole (21) on the knob (2), a first elastic component (7) providing an upward elastic force for the locking rod (6), and a lock hole (19) correspondingly arranged on the mounting seat (1); under normal conditions, the locking rod (6) is located in the mounting hole (21) under the action of the first elastic component (7); a padlock hole (22) is provided on the knob (2) at the top of the mounting hole (21); when the knob (2) is in an off-state position, the locking rod (6) is aligned with the lock hole (19); downward pressure is applied to the locking rod (6) so that the locking rod (6) moves downward and is inserted into the lock hole; at this time, a padlock is provided in the padlock hole (22) to limit the upward movement of the locking rod (6), thereby locking the knob (2); A second rotating block (8) is rotatably provided between the mounting seat (1) and the knob (2) and rotates synchronously with the knob (2). The knob (2) is provided with a limit rod (9) that can move up and down and a second elastic component (10) that provides a downward elastic force for the limit rod (9). The second rotating block (8) has a first through hole (81) for the lower end of the limit rod (9) to pass through and a second through hole (82) for the lower end of the locking rod (6) to pass through. The first elastic component (7) is sleeved on the locking rod (6), and its upper and lower ends respectively abut against the locking rod (6) and the second elastic component (7). On the rotating block (8), a first limiting protrusion (14) and a second limiting protrusion (15) are provided on the mounting seat (1) on the rotation path of the limiting rod (9); under normal conditions, the lower end of the limiting rod (9) abuts against the mounting seat (1) under the elastic force of the second elastic component (10); when the knob (2) is in the open state position and the closed state position, the limiting rod (9) abuts against the first limiting protrusion (14) and the second limiting protrusion (15) respectively to overcome the reverse action force of the first buffer component (4) and the second buffer component (5) on the knob (2).

2. The external manual operating device for a circuit breaker according to claim 1, characterized in that: The first buffer component (4) and the second buffer component (5) are helical compression springs.

3. The external manual operating device for a circuit breaker according to claim 2, characterized in that: The mounting seat (1) has a first card slot (12) and a second card slot (13); the first end of the first buffer component (4) is clamped in the first card slot (12), and the first end of the second buffer component (5) is clamped in the second card slot (13); When the knob (2) is rotated to the opening state position, the abutment portion (31) on the first rotating block (3) abuts against the second end of the first buffer component (4); when the knob (2) is rotated to the closing state position, the abutment portion (31) on the first rotating block (3) abuts against the second end of the second buffer component (5).

4. The external manual operating device for a circuit breaker according to claim 1, characterized in that: The first elastic component (7) is a helical compression spring.

5. The external manual operating device for a circuit breaker according to claim 1, characterized in that: The second elastic component (10) is a helical compression spring sleeved on the limiting rod (9), with upper and lower ends respectively resting on the knob (2) and the limiting rod (9).

6. The external manual operating device for a circuit breaker according to claim 1, characterized in that: The first rotating block (3) is arranged between the base (16) and the surface cover (17), the first buffer component (4) and the second buffer component (5) are installed inside the surface cover (17), and the knob (2) is installed on the outside of the surface cover (17).

7. The external manual operating device for a circuit breaker according to claim 1, characterized in that: A locking sleeve (18) is screwed onto the bottom of the mounting seat (1) at a position corresponding to the insertion hole (11). The locking sleeve (18) has a through hole (181) for the linkage shaft to pass through. The lower end of the through hole (181) is trumpet-shaped.

8. The external manual operating device for a circuit breaker according to claim 1, characterized in that: The rotatable angle of the knob (2) is greater than the angle between the opening state position and the closing state position.

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