Circuit breaker opening and closing device

Abstract

The utility model discloses a circuit breaker opening and closing device, which belongs to the field of power equipment and comprises a support, a screw rod and a joint, the support is used for being mounted on a circuit breaker, a threaded hole is arranged on the support, the screw rod penetrates through the threaded hole and is in adaptive threaded connection with the threaded hole, the joint is used for being connected with a transmission shaft of the circuit breaker, and the joint is rotatably connected onto the screw rod. The rotation center of the connector is the axial direction of the lead screw, and the lead screw operably rotates to drive the connector to move in the axial direction of the lead screw. According to the circuit breaker opening and closing device, when the screw rod rotates, the joint does not rotate along with the screw rod, the screw rod rotates to drive the joint to move in the axial direction of the screw rod and drive the transmission shaft of the circuit breaker to move in the axial direction of the screw rod, opening and closing of an arc extinguish chamber of the circuit breaker are achieved, use is convenient, and one person can operate the device. The circuit breaker arc extinguish chamber is free of radial force in the opening and closing process, the transmission shaft is prevented from being damaged, the overall weight is light, and manual installation can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of power equipment, in particular to a circuit breaker opening and closing device. Background Art

[0002] During the assembly process, 110kV miniaturized high-voltage switch circuit breakers need to be manually opened and closed for purposes such as measuring the assembly spacing, centering adjustment, and resistance measurement. Currently, these operations are performed using a crane or lever-based tooling. These two methods are inefficient, and the speed cannot be effectively controlled during the opening and closing process. These methods can easily generate radial impact forces, impacting the internal parts of the circuit breaker and potentially affecting shaft seals and other quality risks. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a circuit breaker opening and closing device that solves the problems of the prior art, such as slow opening and closing efficiency, inability to effectively control the opening and closing speed during the opening and closing process, and the tendency to generate radial impact forces that impact the internal components of the circuit breaker and affect the shaft seal, among other quality risks.

[0004] A circuit breaker opening and closing device according to an embodiment of the present invention includes:

[0005] A bracket, used for being mounted on the circuit breaker, wherein the bracket is provided with a threaded hole;

[0006] A screw rod is inserted into the threaded hole, and the screw rod and the threaded hole are threadably connected;

[0007] A connector is used to connect the transmission shaft of the circuit breaker. The connector is rotatably connected to the screw rod. The rotation center of the connector is the axial direction of the screw rod. The screw rod can be operably rotated to drive the connector to move along the axial direction of the screw rod.

[0008] A circuit breaker opening and closing device according to an embodiment of the present invention has at least the following beneficial effects:

[0009] The bracket is installed on the circuit breaker, keeping the axial direction of the screw rod consistent with the axial direction of the drive shaft of the circuit breaker, the joint is connected to the drive shaft of the circuit breaker, and the screw rod is manually rotated, and the joint is rotatably connected to the screw rod. When the screw rod rotates, the joint will not rotate with the screw rod. The screw rod moves along the axial direction of the screw rod relative to the bracket, and then drives the joint to move along the axial direction of the screw rod, driving the drive shaft of the circuit breaker to move along the axial direction of the screw rod, thereby realizing the opening and closing of the circuit breaker arc extinguishing chamber. It is easy to use and can be operated by one person. There is no radial force in the opening and closing process of the circuit breaker arc extinguishing chamber, which avoids damage to the drive shaft. The overall weight is light and can be installed manually.

[0010] According to some embodiments of the present invention, a transmission assembly is connected between the screw rod and the joint, and the joint is rotatably connected to the screw rod through the transmission assembly.

[0011] According to some embodiments of the present invention, the transmission assembly includes a bearing, the screw is connected to the outer ring of the bearing, and the corresponding joint is connected to the inner ring of the bearing;

[0012] Alternatively, the screw rod is connected to the inner ring of the bearing, and the corresponding joint is connected to the outer ring of the bearing.

[0013] According to some embodiments of the present invention, the transmission assembly includes a bearing seat and a connecting shaft, the bearing seat is provided with a mounting groove, the bearing is mounted in the mounting groove, the bearing seat is connected to the outer ring of the bearing, the connecting shaft is passed through the inner hole of the bearing, and the connecting shaft is connected to the inner ring of the bearing;

[0014] When the screw is connected to the outer ring of the bearing, the screw is connected to the bearing seat, and the corresponding joint is connected to the connecting shaft;

[0015] When the screw rod is connected to the inner ring of the bearing, the screw rod is connected to the connecting shaft, and the corresponding joint is connected to the bearing seat.

[0016] According to some embodiments of the present invention, the transmission assembly also includes a bearing cover, a washer, a first fastener and a second fastener, a avoidance hole is provided in the middle of the bearing cover, the connecting shaft is passed through the avoidance hole, the first fastener is used to fasten the bearing cover to the bearing seat, the bearing cover is used to limit the bearing in the mounting groove, the outer diameter of the washer is larger than the inner diameter of the inner ring of the bearing, the second fastener is used to fasten the washer to the connecting shaft, and the washer is used to limit the inner ring of the bearing to the connecting shaft.

[0017] According to some embodiments of the present invention, a relief groove is provided on the bottom wall of the installation groove, and the connection between the relief groove and the installation groove is stepped, and the relief groove is used for the gasket and the second fastener to extend into.

[0018] According to some embodiments of the present invention, the mounting groove is a circular groove, the avoidance groove is a circular groove, the mounting groove is consistent with the axial direction of the avoidance groove, the outer ring of the bearing abuts the inner wall of the mounting groove, the inner diameter of the avoidance groove is larger than the outer diameter of the inner ring of the bearing, and the inner diameter of the avoidance groove is smaller than the inner diameter of the outer ring of the bearing.

[0019] According to some embodiments of the present invention, a connection hole for connecting to a transmission shaft of a circuit breaker is provided on the joint.

[0020] According to some embodiments of the present invention, a handwheel is connected to the screw rod, and the handwheel is used to drive the screw rod to rotate.

[0021] According to some embodiments of the present invention, the thread of the threaded hole is a trapezoidal thread, and the thread profile of the screw rod is correspondingly trapezoidal.

[0022] According to some embodiments of the present invention, the bracket includes a first support rod, a second support rod and a support plate, one end of the first support rod and one end of the second support rod are used to connect the circuit breaker, the support plate is connected to the other end of the first support rod and the other end of the second support rod, and the threaded hole is provided on the support plate.

[0023] Additional aspects and advantages of the present invention will be described in part in the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0025] Figure 1 This is a structural diagram of a circuit breaker opening and closing device according to an embodiment of the present utility model;

[0026] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0027] Figure 3 This is a cross-sectional view of the bearing seat of the circuit breaker opening and closing device according to an embodiment of the present utility model.

[0028] Figure Number:

[0029] 100, bracket; 110, first support rod; 120, second support rod; 130, support plate;

[0030] 200, screw; 210, handwheel;

[0031] 300, connector; 310, connection hole;

[0032] 400, transmission assembly; 410, bearing; 420, bearing seat; 421, mounting groove; 422, avoidance groove; 430, connecting shaft; 440, bearing cover; 450, washer; 460, first fastener; 470, second fastener. DETAILED DESCRIPTION

[0033] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0035] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0036] See also Figure 1 and Figure 2 A circuit breaker opening and closing device according to an embodiment of the present invention includes a bracket 100, a screw rod 200, and a connector 300. The bracket 100 is used to be mounted on the circuit breaker, and a threaded hole is provided on the bracket 100. The screw rod 200 is passed through the threaded hole, and the screw rod 200 is threadedly connected to the threaded hole. The connector 300 is used to connect to the transmission shaft of the circuit breaker. The connector 300 is rotatably connected to the screw rod 200. The rotation center of the connector 300 is the axial direction of the screw rod 200. The screw rod 200 can be operably rotated to drive the connector 300 to move along the axial direction of the screw rod 200.

[0037] The bracket 100 is installed on the circuit breaker, keeping the axial direction of the screw rod 200 consistent with the axial direction of the transmission shaft of the circuit breaker, the joint 300 is connected to the transmission shaft of the circuit breaker, and the screw rod 200 is manually rotated. The joint 300 is rotatably connected to the screw rod 200. When the screw rod 200 rotates, the joint 300 will not rotate with the screw rod 200. The screw rod 200 moves along the axial direction of the screw rod 200 relative to the bracket 100, thereby driving the joint 300 to move along the axial direction of the screw rod 200, and driving the transmission shaft of the circuit breaker to move along the axial direction of the screw rod 200, thereby realizing the opening and closing of the circuit breaker arc extinguishing chamber. It is easy to use and can be operated by one person. There is no radial force during the opening and closing process of the circuit breaker arc extinguishing chamber, which avoids damage to the transmission shaft. The overall weight is light and can be installed manually.

[0038] In some embodiments, see Figure 1 and Figure 2 A transmission assembly 400 is connected between the screw rod 200 and the joint 300, and the joint 300 is rotatably connected to the screw rod 200 through the transmission assembly 400. By setting the transmission assembly 400, the screw rod 200 and the joint 300 are firmly connected, and the screw rod 200 and the joint 300 are easily assembled and disassembled.

[0039] In some embodiments, see Figure 1 and Figure 2 The transmission assembly 400 includes a bearing 410. The screw 200 is connected to the outer ring of the bearing 410, and the corresponding connector 300 is connected to the inner ring of the bearing 410. The bearing 410 may be a double-row angular contact ball bearing 410. The double-row angular contact ball bearing 410 can withstand radial loads and axial loads acting in both directions, effectively limiting bidirectional axial displacement of the shaft or housing. While ensuring that the screw 200 can rotate relative to the connector 300, it also ensures that the screw 200 can drive the connector 300 to move axially along the screw 200.

[0040] The screw rod 200 may also be connected to the inner ring of the bearing 410 , and the corresponding joint 300 may be connected to the outer ring of the bearing 410 .

[0041] In some embodiments, see Figure 1 、 Figure 2 and Figure 3 The transmission assembly 400 includes a bearing seat 420 and a connecting shaft 430. The bearing seat 420 is provided with a mounting groove 421. The bearing 410 is installed in the mounting groove 421. The bearing seat 420 is connected to the outer ring of the bearing 410. The connecting shaft 430 is passed through the inner hole of the bearing 410 and the connecting shaft 430 is connected to the inner ring of the bearing 410.

[0042] When the screw rod 200 is connected to the outer ring of the bearing 410, the screw rod 200 is connected to the bearing seat 420, and the corresponding joint 300 is connected to the connecting shaft 430. The joint 300 is connected to the connecting shaft 430 via a pin. The provision of the bearing seat 420 for mounting the bearing 410, the screw rod 200 connected to the bearing seat 420, and the connecting shaft 430 connected to the inner ring of the bearing 410 ensures that the axial direction of the screw rod 200 is consistent with the axial direction of the bearing 410, and the axial direction of the screw rod 200 is consistent with the axial direction of the connecting shaft 430. This facilitates the alignment of the axial direction of the screw rod 200 with the axial direction of the circuit breaker's drive shaft during the circuit breaker opening and closing operations, allowing the circuit breaker opening and closing operations to proceed smoothly.

[0043] When the screw rod 200 is connected to the inner ring of the bearing 410 , the screw rod 200 is connected to the shaft 430 , and the corresponding joint 300 is connected to the bearing seat 420 .

[0044] In some embodiments, see Figure 1 、 Figure 2 and Figure 3 Transmission assembly 400 further includes a bearing cap 440, a washer 450, a first fastener 460, and a second fastener 470. A clearance hole is provided in the center of bearing cap 440, through which connecting shaft 430 passes. First fastener 460 is used to secure bearing cap 440 to bearing seat 420, which in turn secures bearing 410 within mounting groove 421. The outer diameter of washer 450 is larger than the inner diameter of the inner ring of bearing 410. Second fastener 470 is used to secure washer 450 to connecting shaft 430, which in turn secures the inner ring of bearing 410 to connecting shaft 430.

[0045] The first fastener 460 can fasten the bearing cap 440 to the bearing seat 420. The bearing cap 440 can restrict the bearing 410 from being removed from the mounting groove 421, thereby ensuring a secure connection between the bearing 410 and the bearing seat 420. The second fastener 470 can fasten the washer 450 to the connecting shaft 430. The outer diameter of the washer 450 is larger than the inner diameter of the inner ring of the bearing 410. The washer 450 will not fall out of the inner hole of the inner ring of the bearing 410. The washer 450 can prevent the connecting shaft 430 from falling off the inner ring of the bearing 410, thereby ensuring a secure connection between the connecting shaft 430 and the bearing 410.

[0046] The first fastener 460 can be a fastening screw. The bearing cap 440 is provided with a through hole, and the bearing seat 420 is provided with a threaded hole. The fastening screw passes through the through hole of the bearing cap 440 and is screwed into the threaded hole of the bearing seat 420, facilitating assembly and disassembly. The second fastener 470 can be a fastening screw. The inner diameter of the washer 450 is smaller than the outer diameter of the connecting shaft 430. The connecting shaft 430 is provided with a threaded hole. The fastening screw passes through the inner hole of the washer 450 and is screwed into the threaded hole of the connecting shaft 430, facilitating assembly and disassembly.

[0047] The first fastener 460 can also be an internal retaining spring. The outer ring of the bearing cover 440 extends into the mounting groove 421. The inner wall of the mounting groove 421 is provided with a first retaining spring groove. The internal retaining spring engages with the first retaining spring groove, locking the bearing cover 440. The second fastener 470 can be an external retaining spring. The inner diameter of the washer 450 is larger than the outer diameter of the connecting shaft 430. One end of the connecting shaft 430 extends out of the inner hole of the bearing 410. The extended portion is provided with a second retaining spring groove. The washer 450 is sleeved over the portion of the connecting shaft 430 extending out of the bearing 410. The external retaining spring engages with the second retaining spring groove, locking the washer 450.

[0048] In some embodiments, see Figure 1 、 Figure 2 and Figure 3 The bottom wall of the mounting groove 421 is provided with a relief groove 422. The connection between the relief groove 422 and the mounting groove 421 is stepped, so that the bottom wall of the mounting groove 421 can support the bearing 410. The relief groove 422 allows the washer 450 and the second fastener 470 to extend into and avoid interference, ensuring that the washer 450 and the second fastener 470 can rotate smoothly relative to the bearing seat 420.

[0049] In some embodiments, see Figure 1 、 Figure 2 and Figure 3 The mounting groove 421 is a circular groove, and the relief groove 422 is a circular groove. The mounting groove 421 and the relief groove 422 are axially aligned. The outer ring of the bearing 410 abuts the inner wall of the mounting groove 421. The inner diameter of the relief groove 422 is larger than the outer diameter of the inner ring of the bearing 410, which prevents the inner ring of the bearing 410 from interfering with the bottom wall of the mounting groove 421. The inner diameter of the relief groove 422 is smaller than the inner diameter of the outer ring of the bearing 410, allowing the bottom wall of the mounting groove 421 to support the outer ring of the bearing 410.

[0050] In some embodiments, see Figure 1 and Figure 2 Connector 300 is provided with a connection hole 310, which is used to connect to the circuit breaker's drive shaft. The circuit breaker's drive shaft has a corresponding hole. A pin connects the hole in the drive shaft to the connection hole 310, connecting connector 300 to the drive shaft. Remove the pin to disassemble connector 300 from the drive shaft.

[0051] In some embodiments, see Figure 1 and Figure 2 The screw rod 200 is connected to a hand wheel 210, which is used to drive the screw rod 200 to rotate. The hand wheel 210 is connected to the screw rod 200 by a pin, which is convenient for assembly and disassembly. The operator rotates the outer ring of the hand wheel 210 to drive the screw rod 200 to rotate, which is convenient for operation.

[0052] The hand wheel 210 can also be replaced by a connecting rod, which is connected to the end of the screw rod 200 and is arranged in a T shape. When the connecting rod is rotated, the screw rod 200 is driven to rotate.

[0053] In some embodiments, see Figure 1 and Figure 2 The thread of the threaded hole is a trapezoidal thread, and the thread profile of the screw rod 200 is correspondingly trapezoidal. The threaded hole is a Tr18×4 metric trapezoidal thread with a thread angle of 30°. The thread profile of the screw rod 200 is an isosceles trapezoid. The combination of the trapezoidal thread and the screw rod provides high transmission efficiency and ensures the strength and rigidity of the screw rod 200.

[0054] In some embodiments, see Figure 1 and Figure 2 The bracket 100 includes a first support rod 110, a second support rod 120, and a support plate 130. One end of the first support rod 110 and one end of the second support rod 120 are used to connect to the circuit breaker. The support plate 130 is connected to the other end of the first support rod 110 and the other end of the second support rod 120. Threaded holes are provided on the support plate 130. The lower ends of the first support rod 110 and the second support rod 120 can be connected to the flange of the circuit breaker end cover to support the entire fixture. The upper ends of the first support rod 110 and the second support rod 120 are connected to the support plate 130 by screws. A nut is welded to the middle of the support plate 130, and the threaded hole is located on the nut.

[0055] The working principle of the circuit breaker opening and closing device in the embodiment of the present application is as follows:

[0056] The first support rod 110 and the second support rod 120 are installed on the end cover of the short circuit breaker (the axial direction of the screw rod 200 is consistent with the axial direction of the transmission shaft of the circuit breaker), fixed with bolts, and then the joint 300 is connected to the transmission shaft of the circuit breaker through a pin rod. The handwheel 210 is turned to drive the screw rod 200 to rotate, drive the joint 300 to move along the axial direction of the screw rod 200, and drive the transmission shaft of the circuit breaker to move along the axial direction of the screw rod 200 to realize the opening and closing of the arc extinguishing chamber of the circuit breaker. Clockwise is the closing operation, and counterclockwise is the opening operation.

[0057] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0058] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A circuit breaker opening and closing device, characterized in that: include: A bracket, used for being installed on the circuit breaker, wherein the bracket is provided with a threaded hole; A screw rod is inserted into the threaded hole, and the screw rod and the threaded hole are threadably connected; A joint is used to connect the transmission shaft of the circuit breaker. The joint is rotatably connected to the screw rod. The rotation center of the joint is the axial direction of the screw rod. The screw rod can be operably rotated to drive the joint to move along the axial direction of the screw rod.

2. A circuit breaker opening and closing device according to claim 1, characterized in that: A transmission assembly is connected between the screw rod and the joint, and the joint is rotatably connected to the screw rod through the transmission assembly.

3. A circuit breaker opening and closing device according to claim 2, characterized in that: The transmission assembly includes a bearing, the screw rod is connected to the outer ring of the bearing, and the corresponding joint is connected to the inner ring of the bearing; Alternatively, the screw rod is connected to the inner ring of the bearing, and the corresponding joint is connected to the outer ring of the bearing.

4. A circuit breaker opening and closing device according to claim 3, characterized in that: The transmission assembly includes a bearing seat and a connecting shaft, the bearing seat is provided with a mounting groove, the bearing is mounted in the mounting groove, the bearing seat is connected to the outer ring of the bearing, the connecting shaft is passed through the inner hole of the bearing, and the connecting shaft is connected to the inner ring of the bearing; When the screw rod is connected to the outer ring of the bearing, the screw rod is connected to the bearing seat, and the corresponding joint is connected to the connecting shaft; When the screw rod is connected to the inner ring of the bearing, the screw rod is connected to the connecting shaft, and the corresponding joint is connected to the bearing seat.

5. A circuit breaker opening and closing device according to claim 4, characterized in that: The transmission assembly also includes a bearing cover, a washer, a first fastener and a second fastener. A avoidance hole is provided in the middle of the bearing cover, and the connecting shaft is passed through the avoidance hole. The first fastener is used to fasten the bearing cover to the bearing seat, and the bearing cover is used to limit the bearing in the mounting groove. The outer diameter of the washer is larger than the inner diameter of the inner ring of the bearing. The second fastener is used to fasten the washer to the connecting shaft, and the washer is used to limit the inner ring of the bearing to the connecting shaft.

6. A circuit breaker opening and closing device according to claim 5, characterized in that: A relief groove is arranged on the bottom wall of the installation groove, and the connection between the relief groove and the installation groove is in a step shape. The relief groove is used for the gasket and the second fastener to extend into.

7. A circuit breaker opening and closing device according to claim 1, characterized in that: The joint is provided with a connecting hole for connecting with the transmission shaft of the circuit breaker.

8. A circuit breaker opening and closing device according to claim 1, characterized in that: The screw rod is connected with a hand wheel, and the hand wheel is used to drive the screw rod to rotate.

9. A circuit breaker opening and closing device according to claim 1, characterized in that: The thread of the threaded hole is a trapezoidal thread, and the thread profile of the screw rod is correspondingly a trapezoid.

10. A circuit breaker opening and closing device according to claim 1, characterized in that: The bracket includes a first support rod, a second support rod and a support plate, one end of the first support rod and one end of the second support rod are used to connect the circuit breaker, the support plate is connected to the other end of the first support rod and the other end of the second support rod, and the threaded hole is provided on the support plate.

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