Electric operating mechanism

Abstract

The utility model provides an electric operation mechanism which comprises an upper support and a main shaft arranged on the upper support, rotation driving force is applied to the main shaft to enable the main shaft to have two rotation directions of forward rotation and reverse rotation, and at least two limiting baffles are arranged on the main shaft. A pawl and a reset piece are arranged on the upper support, the pawl comprises a rotating end and a swinging end, the pawl is rotationally connected with the upper support through the rotating end, the swinging end is connected with the reset piece, and in the forward rotation process of the limiting baffles, one limiting baffle can push the pawl to rotate away from the main shaft; a clamping groove is formed in the side face, abutting against the limiting baffle, of the pawl and comprises a blocking face and a transition face, the blocking face is used for being matched with the limiting baffle to prevent the main shaft from rotating reversely, and the transition face is used for assisting the limiting baffle to slide into or out of the clamping groove; after the electric or manual operation action is finished, the main shaft is limited at a certain angle and position by the pawl and cannot rotate reversely to change the position.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to an electric operating mechanism. Background Art

[0002] A circuit breaker is an important electrical device whose main function is to switch power distribution circuits, motors or other electrical equipment in a power system on and off, and to automatically disconnect the circuit in case of abnormal conditions such as overload, short circuit or undervoltage, thereby playing a protective role.

[0003] Circuit breakers operate electrically or manually, causing the main shaft and cam to rotate and push the circuit breaker handle to perform opening, closing, and re-clamping functions. However, during the closing process, the cam and main shaft may rapidly reach their limit positions due to the rapid impact of the switch handle, and rebound after colliding with the slider. This rebound can cause the main shaft and cam to stop in an unexpected position, leading to unsuccessful circuit breaker operation.

[0004] Furthermore, even if no rebound occurs, if the operator manually rotates the spindle counterclockwise, the spindle may remain in an inappropriate position due to improper operation. This situation will also interfere with the accuracy of the indicator system or hinder the next normal operation. Summary of the Invention

[0005] The purpose of this invention is to provide an electric operating mechanism to solve the above-mentioned problems.

[0006] The technical solution adopted in this utility model is as follows:

[0007] An electric operating mechanism includes an upper support and a main shaft mounted on the upper support. A rotational driving force is applied to the main shaft so that the main shaft has two rotation directions: forward rotation and reverse rotation. At least two limiting baffles are provided on the main shaft.

[0008] A pawl and a reset component are provided on the upper support. The pawl includes a rotating end and a swinging end. The pawl is rotatably connected to the upper support through the rotating end, and the swinging end is connected to the reset component. During the forward rotation of the limiting baffle, one of the limiting baffles can push the pawl to rotate away from the main shaft. The reset component is used to reset the rotation of the pawl away from the main shaft. A slot is provided on the side of the pawl that abuts against the limiting baffle. The slot includes a blocking surface and a transition surface. The blocking surface is used to cooperate with the limiting baffle to prevent the main shaft from reversing, and the transition surface is used to help the limiting baffle slide into or out of the slot.

[0009] As a further improvement of the present invention, the side of the pawl that abuts against the limiting baffle includes an arc segment, the arc segment extending from the rotating end of the pawl to the slot, and the arc segment being recessed inward toward the pawl.

[0010] As a further improvement of this utility model, the reset component is a spring, and the spring applies a force in the direction of the main shaft to the swing end of the pawl.

[0011] As a further improvement of this utility model, a first fixing hole is provided on the upper bracket, one hanging foot of the spring is engaged in the first fixing hole, a second fixing hole is provided at the swing end of the pawl, and the other hanging foot of the spring is engaged in the second fixing hole.

[0012] As a further improvement of the present invention, the rotating end and the swinging end are respectively located at the two ends of the pawl. A third through hole is provided at the rotating end of the pawl, and a first central shaft is provided on the upper bracket. The first central shaft passes through the third through hole and is fixed by a retaining ring. A waist hole is provided at the swinging end of the pawl, and a second central shaft is provided on the upper bracket. The second central shaft passes through the waist hole and is fixed by a retaining ring.

[0013] As a further improvement of this utility model, the waist hole is located between the third through hole and the second fixing hole.

[0014] As a further improvement of the present invention, the electric operating mechanism further includes a lower support, the upper support is disposed on the lower support, and a slider assembly is disposed on the lower support. The slider assembly includes a guide rod and a slider. The guide rod is mounted on the lower support, and the slider is slidably mounted on the guide rod. The main shaft can drive the slider to reciprocate on the guide rod.

[0015] As a further improvement of this utility model, a cam that can rotate synchronously with the main shaft is provided at the bottom of the main shaft, and a pulley is connected to the cam. The cam can drive the pulley to rotate synchronously, and the pulley can push the slider to reciprocate on the guide rod.

[0016] As a further improvement of this utility model, a groove is provided in the slider, and the pulley is disposed in the groove.

[0017] As a further improvement of this utility model, a rotary plate that can rotate synchronously with the main shaft is provided on the upper part of the main shaft. An arc-shaped protrusion is provided in the radial direction of the rotary plate. A micro switch is provided on the upper support. During the rotation of the rotary plate with the main shaft, the arc-shaped protrusion can push the micro switch to close.

[0018] The beneficial effects of this utility model are as follows:

[0019] With the above structure, after the electric or manual operation is completed, the spindle will be restricted to a certain angle and position by the pawl, and cannot be reversed to change its position, thereby ensuring the accuracy and consistency of the stopping position and improving safety performance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the electric control mechanism;

[0021] Figure 2 This is a schematic diagram of the connection between the spindle and the pawl;

[0022] Figure 3 This is a schematic diagram of the pawl structure;

[0023] Figure 4 yes Figure 2 The main view;

[0024] Figure 5 This is a schematic diagram of the transmission from the spindle to the slider assembly;

[0025] Figure 6 This is a schematic diagram of the slider assembly.

[0026] Wherein: 1-lower support, 2-upper support, 201-first fixing hole, 3-main shaft, 301-limiting baffle, 4-rotating plate, 401-arc protrusion, 5-micro switch, 6-cam, 7-pulley, 8-pawl, 801-slot, 8011-blocking surface, 8012-transition surface, 802-arc segment, 803-waist hole, 804-third through hole, 805-second fixing hole, 9-spring, 10-first central shaft, 11-second central shaft, 12-guide rod, 13-slider, 14-slide groove, 1401-first slide groove, 1402-second slide groove, 1403-third slide groove. DETAILED DESCRIPTION

[0027] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0028] If the description of this utility model involves directions (e.g., up, down, left, right, front, back, outside, inside, etc.), then the directions involved need to be defined. For example, "To clearly express the position and direction described in this utility model, the operator of the instrument is used as a reference, the end closer to the operator is the proximal end, and the end farther from the operator is the distal end." Or, the paper can be used as a reference. Of course, if the positional relationship between the two is defined by mutual reference in the subsequent description, then this definition is not required.

[0029] An electric operating mechanism is used to drive the handle of a circuit breaker to perform operations such as opening and closing the circuit breaker, such as... Figures 1-4 As shown, the electric operating mechanism includes a lower support 1, on which an upper support 2, a main shaft 3, a rotary plate 4, and a cam 6 are mounted. A first through hole and a second through hole are respectively provided on the upper support 2 and the lower support 1. The main shaft 3, the first through hole, and the second through hole are coaxially arranged. The main shaft 3 passes through the first through hole and the second through hole to connect with the upper support 2 and the lower support 1. An external driving force (e.g., motor drive or manual drive) applies a rotational driving force to the main shaft 3, allowing it to rotate in both forward and reverse directions. The rotary plate 4 is located above the main shaft 3 and above the upper support 2. The main shaft 3 can drive the rotary plate 4 to rotate synchronously. A micro switch 5 is mounted on the upper support 2, and the closing and opening signals of the micro switch 5 transmit the circuit breaker's opening and closing signals. The cam 6 is located at the lower part of the main shaft 3 and below the lower support 1. The main shaft 3 can drive the cam 6 to rotate synchronously. A slider assembly is provided on the lower support 1. The slider assembly is used to push the handle of the circuit breaker. The cam 6 can push the slider 13 in the slider assembly to reciprocate.

[0030] At least two axially extending limiting baffles 301 are provided on the main shaft 3, and a pawl 8 and a reset component are provided on the upper bracket 2, such as... Figure 2 , Figure 4As shown, the pawl 8 includes a rotating end and a swinging end. The pawl 8 is rotatably connected to the upper support 2 through the rotating end, allowing the swinging end to rotate around the rotating end as the rotation center. The swinging end is connected to a reset component, which is used to reset the rotation of the pawl 8 away from the main shaft 3. During the forward rotation of the limiting baffle 301, one of the limiting baffles 301 can push the pawl 8 to rotate away from the main shaft 3. That is, with the rotation direction of the main shaft 3 as the standard, the limiting baffle 301 rotates forward and pushes the pawl 8 to rotate in reverse. A slot 801 is provided on the side of the pawl 8 that abuts against the limiting baffle 301. The slot 801 includes a blocking surface 8011 and a transition surface 8011. 12. The transition surface 8012 is used to assist the limiting baffle 301 in sliding into or out of the slot 801. When the limiting baffle 301 rotates forward, the pawl 8 rotates in reverse away from the main shaft 3. The limiting baffle 301 slides out of the slot 801 through the transition surface 8012. The blocking surface 8011 is used to cooperate with the limiting baffle 301 to prevent the main shaft 3 from rotating in reverse. When the limiting baffle 301 rotates in reverse, the reset member causes the pawl 8, which was originally rotating in reverse away from the main shaft 3, to rotate forward closer to the main shaft 3. The limiting baffle 301 slides into the slot 801 through the transition surface 8012 and pushes the blocking surface 8011. Restricted by the reset member, the pawl 8 rotates forward closer to the main shaft 3 until the limit of the movement range.

[0031] As an embodiment of the present invention, the side of the pawl 8 that abuts against the limiting baffle 301 includes an arc segment 802. The arc segment 802 extends from the rotating end of the pawl 8 to the slot 801. The arc segment 802 is recessed inward toward the pawl 8. The shape of the arc segment 802 matches the movement of the limiting baffle 301.

[0032] In one embodiment of this utility model, the reset component is a spring 9. A first fixing hole 201 is provided on the upper bracket 2. One of the hanging feet of the spring 9 is engaged in the first fixing hole 201. A second fixing hole 805 is provided at the swing end of the pawl 8. The other hanging foot of the spring 9 is engaged in the second fixing hole 805. The spring 9 applies a force to the swing end of the pawl 8 in the direction of the main shaft 3, thereby enabling the pawl 8 to be reset.

[0033] The rotating end and the swinging end are respectively located at both ends of the pawl 8. As an embodiment of the present invention, a third through hole 804 is provided at the rotating end of the pawl 8, and a first central shaft 10 is fixedly provided on the upper bracket 2. The first central shaft 10 passes through the third through hole 804 and is fixed by a retaining ring, so that the rotating end of the pawl 8 is rotatably connected to the upper bracket 2.

[0034] A waist hole 803 is provided at the swing end of the pawl 8. A second central shaft 11 is fixedly mounted on the upper bracket 2. The second central shaft 11 passes through the waist hole 803 and is fixed by a retaining ring. The rotation range of the pawl 8 is limited by the second central shaft 11 and the waist hole 803. In conjunction with the spring 9, the pawl 8 stops swinging more precisely and stably, thereby ensuring the accurate positioning of the main shaft 3. As an embodiment of this utility model, the waist hole 803 is located between the third through hole 804 and the second fixing hole 805.

[0035] As one embodiment of this utility model, such as Figures 5-6 As shown, the slider assembly includes a guide rod 12 and a slider 13. The guide rod 12 is mounted on the lower support 1, and the slider 13 is slidably mounted on the guide rod 12. The main shaft 3 can drive the slider 13 to reciprocate on the guide rod 12. Specifically, there can be two guide rods 12. During the sliding process of the slider 13, the slider 13 can drive the circuit breaker handle to move. A pulley 7 is connected to the cam 6, and the cam 6 can drive the pulley 7 to rotate synchronously. A groove 14 is provided in the slider 13, and the pulley 7 is disposed in the groove 14. The groove 14 includes a first groove 1401, a second groove 1402, and a third groove 1403. The first groove 1401 and the second groove 1402 are inclined, and the second groove 1402 and the third groove 1403 are also inclined. The parameters of the groove 14 are set in coordination with the cam 6 and other components. The cam 6 drives the pulley 7 to move, and the pulley 7 pushes the two inner sides of the groove 14 to drive the slider 13 to move.

[0036] As an embodiment of the present invention, an arc-shaped protrusion 401 is provided in the radial direction of the rotary plate 4. During the rotation of the rotary plate 4 with the main shaft 3, the arc-shaped protrusion 401 can push the micro switch 5 to close, or separate from the micro switch 5 to make the micro switch 5 open.

[0037] In one embodiment of this utility model, the limiting baffle 301 can be formed by the operating square hole of the main shaft 3. In this case, there are two limiting baffles 301. During rotation, one of the limiting baffles 301 can be locked in the slot 801, while the other is not in the slot 801. Alternatively, the limiting baffle 301 can be a ratchet provided on the main shaft 3.

[0038] The working principle of this utility model is as follows:

[0039] Driven by the driving force, the main shaft 3 rotates clockwise, causing the rotary plate 4 and cam 6 to rotate synchronously. During the rotation, the limiting baffle 301 abuts against the arc segment 802 on the side of the pawl 8. The pawl 8 rotates counterclockwise around the first central axis 10 along with the limiting baffle 301. During this period, the limiting baffle 301 slides from the arc segment 802 into the slot 801 and slides out of the slot 801 through the transition surface 8012. Under the tension of the spring 9, the pawl 8 rotates clockwise around the first central axis 10. When the main shaft 3 rotates to the set angle, the rotary plate 4 pushes the micro switch 5 to close, and the cam 6 drives the pulley 7 to the designated position. The pulley 7 also pushes the slider 13 to the designated position. If the pulley 7 tends to move in the opposite direction due to the reaction force of the impact, it will be fed back to the main shaft 3. The main shaft 3 will then rotate counterclockwise. The limiting baffle 301 will slide into the slot 801 along the transition surface 8012. The limiting baffle 301 will abut against the blocking surface 8011 and push the pawl 8 to rotate counterclockwise. Under the action of the spring 9 and the second rotating shaft, when the pawl 8 rotates to the limit position in the counterclockwise direction, the limiting baffle 301 can no longer push the pawl 8, and the main shaft 3 can no longer rotate in the opposite direction. Therefore, the positions of the main shaft 3, the rotating plate 4, the cam 6, the pulley 7, and the slider 13 are fixed. At this time, the slider 13 can push the circuit breaker handle to complete the closing operation.

[0040] The electric operating mechanism provided by this utility model, by setting the pawl 8, reset component and other structures, after the electric or manual operation is completed, the main shaft 3 will be restricted to a certain angle and position by the pawl 8, and cannot be reversed to change position, thereby ensuring the accuracy and consistency of the stop position and improving safety performance.

[0041] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0042] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementation methods or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. An electric operating mechanism, characterized in that: The electric operating mechanism includes an upper support (2) and a main shaft (3) set on the upper support (2). A rotational driving force is applied to the main shaft (3) so that the main shaft (3) has two rotation directions: forward and reverse. At least two limit baffles (301) are provided on the main shaft (3). A pawl (8) and a reset member are provided on the upper bracket (2). The pawl (8) includes a rotating end and a swinging end. The pawl (8) is rotatably connected to the upper bracket (2) through the rotating end. The swinging end is connected to the reset member. During the forward rotation of the limiting baffle (301), one of the limiting baffles (301) can push the pawl (8) to rotate away from the main shaft (3). The reset member is used to reset the rotation of the pawl (8) away from the main shaft (3). A slot (801) is provided on the side of the pawl (8) that abuts against the limiting baffle (301). The slot (801) includes a blocking surface (8011) and a transition surface (8012). The blocking surface (8011) is used to cooperate with the limiting baffle (301) to prevent the main shaft (3) from reversing. The transition surface (8012) is used to help the limiting baffle (301) slide into or out of the slot (801).

2. The electric operating mechanism according to claim 1, characterized in that: The side of the pawl (8) that abuts against the limiting baffle (301) includes an arc segment (802), which extends from the rotating end of the pawl (8) to the slot (801) and is recessed toward the inside of the pawl (8).

3. The electric operating mechanism according to claim 1, characterized in that: The reset element is a spring (9), which applies a force to the swing end of the pawl (8) in the direction of the main shaft (3).

4. The electric operating mechanism according to claim 3, characterized in that: A first fixing hole (201) is provided on the upper bracket (2), and one of the hanging feet of the spring (9) is locked in the first fixing hole (201). A second fixing hole (805) is provided at the swing end of the pawl (8), and the other hanging foot of the spring (9) is locked in the second fixing hole (805).

5. The electric operating mechanism according to claim 4, characterized in that: The rotating end and the swinging end are respectively located at both ends of the pawl (8). A third through hole (804) is provided at the rotating end of the pawl (8). A first central shaft (10) is provided on the upper bracket (2). The first central shaft (10) passes through the third through hole (804) and is fixed by a retaining ring. A waist hole (803) is provided at the swinging end of the pawl (8). A second central shaft (11) is provided on the upper bracket (2). The second central shaft (11) passes through the waist hole (803) and is fixed by a retaining ring.

6. The electric operating mechanism according to claim 5, characterized in that: The waist hole (803) is located between the third through hole (804) and the second fixing hole (805).

7. The electric operating mechanism according to claim 1, characterized in that: The electric operating mechanism also includes a lower support (1), and the upper support (2) is disposed on the lower support (1). A slider assembly is disposed on the lower support (1). The slider assembly includes a guide rod (12) and a slider (13). The guide rod (12) is mounted on the lower support (1), and the slider (13) is slidably mounted on the guide rod (12). The main shaft (3) can drive the slider (13) to reciprocate on the guide rod (12).

8. The electric operating mechanism according to claim 7, characterized in that: A cam (6) that can rotate synchronously with the main shaft (3) is provided at the bottom of the main shaft (3). A pulley (7) is connected to the cam (6). The cam (6) can drive the pulley (7) to rotate synchronously. The pulley (7) can push the slider (13) to reciprocate on the guide rod (12).

9. The electric operating mechanism according to claim 8, characterized in that: A groove (14) is provided inside the slider (13), and the pulley is disposed inside the groove (14).

10. The electric operating mechanism according to claim 1, characterized in that: A rotary plate (4) that can rotate synchronously with the main shaft (3) is provided on the upper part of the main shaft (3). An arc-shaped protrusion (401) is provided in the radial direction of the rotary plate (4). A micro switch (5) is provided on the upper support (2). During the rotation of the rotary plate (4) with the main shaft (3), the arc-shaped protrusion (401) can push the micro switch (5) to close.

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