Adjustable cantilever structure for large-specification circuit breaker operating mechanism

Abstract

The utility model relates to the technical field of circuit breaker production, in particular to an adjustable cantilever structure for a large-specification circuit breaker operating mechanism, which mainly comprises a cantilever component, a hydraulic expansion sleeve and an operating mechanism rotating shaft, and the outer surface of the operating mechanism rotating shaft is provided with a reference line extending along the axial direction; the cantilever component comprises a sleeve part, a step part and a cantilever part, a plurality of dislocation angle indicating lines are evenly arranged on the outer circumferential face and the end face of the step part in the circumferential direction, the position of the cantilever component on the rotating shaft of the operating mechanism is locked through the hydraulic expansion sleeve, and when the axial position and the circumferential dislocation angle of the cantilever mechanism need to be adjusted, only the hydraulic expansion sleeve needs to be loosened, and the cantilever component can be adjusted. The position of the cantilever component is adjusted through reference indication of the datum reference line and the dislocation angle indication line, the hydraulic expansion sleeve is tightened again after adjustment is completed, overall operation is convenient, and it is ensured that the body overtravel is in place when the cantilever component makes contact with the body contact.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker production, in particular to an adjustable cantilever structure for an operating mechanism of a large-scale circuit breaker. Background Art

[0002] Circuit breakers are one of the most important components in low-voltage power grids. The operating mechanism of large-scale circuit breakers is mounted on the base body via pins and bolts. The power-on and power-off functions are achieved through energy storage, closing, and opening of the mechanism. After the mechanism stores energy, pressing the closing button puts the mechanism in the closed state. When the mechanism is closed, the base body contacts are in the connected position. The operating mechanism of large-scale circuit breakers is generally set with 7 levels (the first cantilever close to the main mechanism frame has 4 levels, i.e. 4 levels, and the second cantilever close to the auxiliary mechanism frame has 3 levels, i.e. 3 levels, for a total of 7 levels). When the mechanism is opened, the base body contacts are in the disconnected position.

[0003] Existing cantilever structures for large-scale circuit breaker operating mechanisms have been found to have shortcomings. Due to their fixed design, when the mechanism is closed, the first cantilever, closest to the main mechanism frame, overtravels into position when contacting the main mechanism contacts. However, the second cantilever, closest to the auxiliary mechanism frame, can easily fail to overtravel into position when contacting the main mechanism contacts due to factors such as assembly errors. Therefore, during actual assembly, the second cantilever, closest to the auxiliary mechanism frame, is often welded with a certain offset angle, such as 3 degrees. However, this method makes it difficult to determine the offset angle in advance and difficult to adjust after welding.

[0004] Therefore, it is necessary to optimize and improve the existing cantilever structure used for the operating mechanism of large-scale circuit breakers. Utility Model Content

[0005] The purpose of the present utility model is to overcome the above-mentioned problems existing in the traditional technology and to provide an adjustable cantilever structure for an operating mechanism of a large-scale circuit breaker.

[0006] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0007] An adjustable cantilever structure for a large-scale circuit breaker operating mechanism includes a cantilever component and a hydraulic expansion sleeve for locking the cantilever component in position on the operating mechanism shaft. The outer surface of the operating mechanism shaft is provided with a datum reference line extending in the axial direction. The cantilever component includes a sleeve portion, one end of which is provided with a step portion with a reduced outer diameter. The outer side of the sleeve portion is provided with a cantilever portion. The outer peripheral surface and end surface of the sleeve portion located at the step portion are uniformly provided with a plurality of misalignment angle indicator lines along the circumferential direction.

[0008] Furthermore, in the above-mentioned adjustable cantilever structure for the operating mechanism of a large-scale circuit breaker, each component in the cantilever member is an integrated structure.

[0009] Furthermore, in the above-mentioned adjustable cantilever structure for the operating mechanism of a large-sized circuit breaker, a plurality of weight-reducing holes are provided on the cantilever portion of the cantilever member.

[0010] Furthermore, in the above-mentioned adjustable cantilever structure for the operating mechanism of a large-sized circuit breaker, the axial length of the sleeve portion is 4 to 6 cm, and the thickness of the cantilever portion is 0.8 to 1.2 cm.

[0011] Furthermore, in the above-mentioned adjustable cantilever structure for the operating mechanism of a large-sized circuit breaker, the outer end surface of the cantilever portion and the bottom surface of the step portion are flush with each other.

[0012] Furthermore, in the adjustable cantilever structure for the operating mechanism of a large-scale circuit breaker, the hydraulic expansion sleeve includes an expansion sleeve body, a pressure-adjusting screw, a piston, a sealing ball, a sealing screw, and a hydraulic medium. The expansion sleeve body is the main component of the expansion sleeve, the pressure-adjusting screw and the piston are mounted in a flange of the expansion sleeve body, and the sealing ball and the sealing screw are used to ensure the sealing of the hydraulic medium. By injecting hydraulic medium into the hydraulic cavity sealed by the expansion sleeve body, tightening the pressure-adjusting screw and pushing the piston to compress the volume of the hydraulic medium, a uniform hydrostatic pressure is generated, thereby causing the expansion sleeve body to elastically deform, achieving the connection between the operating mechanism shaft and the cantilever member and transmitting torque.

[0013] The beneficial effects of the utility model are:

[0014] The utility model has a reasonable structural design and is mainly composed of a cantilever component, a hydraulic expansion sleeve and an operating mechanism shaft. The outer surface of the operating mechanism shaft is provided with a datum reference line extending in the axial direction; the cantilever component includes a sleeve portion, a step portion and a cantilever portion. The outer peripheral surface and the end surface of the step portion are evenly provided with a number of misalignment angle indicator lines along the circumferential direction. The position of the cantilever component on the operating mechanism shaft is locked by the hydraulic expansion sleeve. When it is necessary to adjust the axial position and the circumferential misalignment angle of the cantilever mechanism, it is only necessary to loosen the hydraulic expansion sleeve and adjust the position of the cantilever component by using the reference indication of the datum reference line and the misalignment angle indicator line. After the adjustment is completed, the hydraulic expansion sleeve can be tightened again. The overall operation is convenient, ensuring that the body is in place when the cantilever component contacts the body contact.

[0015] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the main structure of the utility model as a whole;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the cantilever component in the utility model;

[0020] Figure 4 It is a structural diagram of the cantilever component in the utility model;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the cantilever member and the cantilever member after assembly in the utility model;

[0022] Figure 6 It is a side view structural diagram of the cantilever member and the cantilever member after assembly in the utility model;

[0023] In the accompanying drawings, the components represented by the reference numerals are described as follows:

[0024] 1-cantilever component, 101-sleeve portion, 102-step portion, 103-cantilever portion, 104-misalignment angle indicator line, 2-cantilever component, 3-operating mechanism shaft, 301-datum reference line. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] like Figures 1-6As shown, this embodiment provides an adjustable cantilever structure for a large-scale circuit breaker operating mechanism, comprising a cantilever member 1 and a hydraulic expansion sleeve 2 for locking the cantilever member 2 in position on the operating mechanism shaft 3. The outer surface of the operating mechanism shaft 3 is provided with an axially extending datum reference line 301. The cantilever member 1 includes a sleeve portion 101, one end of which is provided with a stepped portion 102 with a reduced outer diameter. A cantilever portion 103 is provided on the outer side of the sleeve portion 101. Several misalignment angle indicator lines 104 are uniformly distributed along the circumference of the outer circumference and end surface of the sleeve portion 101 located at the stepped portion 102.

[0027] In this embodiment, the components of the cantilever member 1 are an integrated structure.

[0028] In this embodiment, a plurality of weight-reducing holes are provided on the cantilever portion 103 of the cantilever member 1 .

[0029] In this embodiment, the axial length of the sleeve portion 101 is 4 to 6 cm, and the thickness of the cantilever portion 103 is 0.8 to 1.2 cm.

[0030] In this embodiment, the outer end surface of the cantilever portion 103 and the bottom surface of the step portion 102 are flush with each other.

[0031] In this embodiment, the hydraulic expansion sleeve 2 comprises an expansion sleeve body, a pressure-adjusting screw, a piston, a sealing ball, a sealing screw, and a hydraulic medium. The expansion sleeve body is the primary component of the expansion sleeve. The pressure-adjusting screw and piston are mounted within the expansion sleeve body's flange. The sealing ball and sealing screw ensure the sealing of the hydraulic medium. By injecting hydraulic medium into the hydraulic cavity sealed by the expansion sleeve body and tightening the pressure-adjusting screw to push the piston, the volume of the hydraulic medium is compressed, generating a uniform hydrostatic pressure. This elastic deformation of the expansion sleeve body achieves the connection between the operating mechanism's rotating shaft 3 and the cantilever member 1 and transmits torque.

[0032] The specific application of this embodiment is as follows: the adjustable cantilever structure is mainly composed of a cantilever component 1, a hydraulic expansion sleeve 2 and an operating mechanism shaft 3. The outer surface of the operating mechanism shaft 3 is provided with a datum reference line 301 extending in the axial direction; the cantilever component 1 includes a sleeve portion 101, a step portion 102 and a cantilever portion 103. The outer peripheral surface and end surface of the step portion 102 are evenly provided with a number of misalignment angle indicator lines 104 along the circumferential direction. The hydraulic expansion sleeve 2 is used to lock the position of the cantilever component 1 on the operating mechanism shaft 3. When the axial position and circumferential misalignment angle of the cantilever component 1 need to be adjusted, it is only necessary to loosen the hydraulic expansion sleeve 2 and use the reference indications of the datum reference line 301 and the misalignment angle indicator lines 104 to adjust the position of the cantilever component 1. After the adjustment is completed, the hydraulic expansion sleeve 2 can be tightened again. The overall operation is convenient, ensuring that the body is in place when the cantilever component 1 contacts the body contact.

[0033] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, numerous modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An adjustable cantilever structure for a large-scale circuit breaker operating mechanism, characterized in that: It includes a cantilever component and a hydraulic expansion sleeve for locking the cantilever component in position on the operating mechanism shaft. The outer surface of the operating mechanism shaft is provided with a datum reference line extending in the axial direction; the cantilever component includes a sleeve portion, one end of the sleeve portion is provided with a step portion with a smaller outer diameter, the outer side of the sleeve portion is provided with a cantilever portion, and the outer peripheral surface and end surface of the sleeve portion located at the step portion are evenly provided with a number of misalignment angle indicator lines along the circumferential direction.

2. The adjustable cantilever structure for a large-scale circuit breaker operating mechanism according to claim 1, characterized in that: The components in the cantilever member are an integrated structure.

3. The adjustable cantilever structure for a large-scale circuit breaker operating mechanism according to claim 2, characterized in that: The cantilever component is provided with a plurality of weight-reducing holes on the cantilever portion.

4. The adjustable cantilever structure for a large-scale circuit breaker operating mechanism according to claim 3, characterized in that: The axial length of the sleeve portion is 4 to 6 cm, and the thickness of the cantilever portion is 0.8 to 1.2 cm.

5. The adjustable cantilever structure for a large-scale circuit breaker operating mechanism according to claim 4, characterized in that: The outer end surface of the cantilever portion is flush with the bottom surface of the step portion.

6. The adjustable cantilever structure for a large-scale circuit breaker operating mechanism according to claim 5, characterized in that: The hydraulic expansion sleeve comprises an expansion sleeve body, a pressure-adjusting screw, a piston, a sealing ball, a sealing screw, and a hydraulic medium. The expansion sleeve body is the primary component of the expansion sleeve. The pressure-adjusting screw and piston are mounted in a flange of the expansion sleeve body. The sealing ball and sealing screw ensure the sealing of the hydraulic medium. By injecting hydraulic medium into the hydraulic cavity sealed by the expansion sleeve body and tightening the pressure-adjusting screw to push the piston, the volume of the hydraulic medium is compressed, generating a uniform hydrostatic pressure. This causes the expansion sleeve body to elastically deform, achieving the connection between the operating mechanism's rotating shaft and the cantilever component and transmitting torque.

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