Rotating shaft of circuit breaker

Abstract

The utility model relates to the technical field of rotating shafts, and provides a rotating shaft of a circuit breaker, which comprises a first sub-shaft and a second sub-shaft, a movable rod is arranged on one side of the first sub-shaft, a fixed rod is arranged on one side, close to the first sub-shaft, of the second sub-shaft, a fixed groove is arranged in the fixed rod, the movable rod is in sliding connection with the inner wall of the fixed rod, and the movable rod is in sliding connection with the inner wall of the fixed rod. An annular clamping groove is formed in the outer surface of the movable rod, a plurality of clamping blocks connected with the annular clamping groove in a clamped mode are arranged on the outer surface of the fixed rod, and a fixing piece used for enabling the clamping blocks to be connected with the annular clamping groove in a clamped mode or enabling the clamping blocks to be separated from the annular clamping groove is further arranged on the outer surface of the fixed rod. According to the technical scheme, the maintenance cost of the rotating shaft is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a rotating shaft technical field, specifically, relates to a rotating shaft of circuit breaker. BACKGROUND

[0002] The rotating shaft of circuit breaker is one of the important mechanical components in the circuit breaker, mainly used for connecting the operating mechanism and the contact system of the circuit breaker to realize the opening and closing action of the contact. It is usually made of wear-resistant and corrosion-resistant materials to ensure stable performance in frequent operation. The rotating shaft rotates or pushes the contact to effectively open or close the circuit when the circuit breaker is working normally, ensuring the safety and stability of the electrical system.

[0003] Currently, the plastic shell circuit breaker on the market usually adopts an integrally formed rotating shaft. Since the rotating shaft needs to drive multiple moving contacts to rotate, its length is relatively long. However, after a long period of use, if a part of the rotating shaft is damaged, the entire rotating shaft needs to be replaced, which will result in high maintenance costs. SUMMARY

[0004] The utility model provides a kind of rotating shaft of circuit breaker, reduce the maintenance cost of rotating shaft.

[0005] The technical scheme of the utility model is as follows: a rotating shaft of circuit breaker, comprising a first shaft and a second shaft, a movable rod is provided on one side of the first shaft, a fixed rod is provided on the side close to the first shaft of the second shaft, a fixed groove is provided in the fixed rod, the movable rod is slidably connected with the inner wall of the fixed rod, an annular clamping groove is provided on the outer surface of the movable rod, a plurality of clamping blocks are provided on the outer surface of the fixed rod and clamped with the annular clamping groove, and a fixing member is further provided on the outer surface of the fixed rod to clamp the clamping blocks with the annular clamping groove or release the clamping blocks from the annular clamping groove.

[0006] Further, the fixing member includes a rotating cylinder and an annular pushing block fixedly connected inside the rotating cylinder, one side of the rotating cylinder is threadedly connected with the outer surface of the fixed rod, the annular pushing block is arranged on the side of the rotating cylinder close to the fixed rod, one side of the annular pushing block is slidably connected with the first annular inclined surface of the clamping block, the inner diameter of the annular pushing block is smaller than the inner diameter of the rotating cylinder, and one side of the clamping block is in contact with the inner wall of the annular pushing block.

[0007] Further, positioning blocks are provided on both sides of the fixed groove, and positioning grooves are provided on both sides of the movable rod, and the positioning blocks are slidably connected with the inner walls of the positioning grooves.

[0008] Further, the clamping blocks are in the shape of a sphere, first inclined surfaces are provided on both sides of the annular clamping groove, one side of the clamping block is in contact with the first inclined surface, and a second inclined surface slidably connected with the clamping block is provided on the side of the movable rod away from the first shaft.

[0009] Further, the outer surface of the rotating cylinder is provided with a rotating block fixedly connected, and the cross section of the rotating block is in a hexagonal shape structure.

[0010] Further, the side of the fixed rod close to the first sub-shaft is provided with a second annular slope, the side of the rotating cylinder away from the annular pushing block is provided with an extrusion slope, and the extrusion slope is in sliding connection with the second annular slope, and the inner diameter of the extrusion slope gradually increases from the side of the rotating cylinder away from the annular pushing block to the direction close to the annular pushing block.

[0011] Further, the outer surface of the second annular slope is provided with a plurality of through grooves, and each through groove is arranged in a circumferential direction with the fixed rod as a center.

[0012] The working principle and beneficial effects of the utility model are as follows:

[0013] The utility model discloses a rotating shaft is designed as first sub-shaft and second sub-shaft, and respectively sets up movable rod and fixed rod, makes each part of rotating shaft when appearing damage, can individually replace damaged part. Only need to replace first sub-shaft and second sub-shaft, thereby reduce the maintenance cost of rotating shaft, improve practicality. The specific operation is as follows: when disassembling, the worker can make the clamping block separate from the clamping groove through the fixing piece, then the operator can take down the damaged part, and the operation is convenient, and it is convenient to maintain and repair. DRAWINGS

[0014] The utility model will be further explained in detail in combination with the drawings and specific embodiment.

[0015] Figure 1 It is the connection structure schematic drawing of multiple sub-shafts in the embodiment;

[0016] Figure 2 It is the exploded structure schematic drawing of first sub-shaft and second sub-shaft in the embodiment;

[0017] Figure 3 It is Figure 2 the enlarged schematic drawing in A place;

[0018] Figure 4 It is the section view of movable rod, fixed rod and fixing piece in the embodiment;

[0019] Figure 5 It is Figure 4 the enlarged schematic drawing in B place.

[0020] In the figure: 1, first sub-shaft; 101, second sub-shaft; 102, movable rod; 1021, annular clamping groove; 103, fixed rod; 1031, fixed groove; 104, clamping block; 1041, accommodating groove; 1042, first inclined surface; 1043, second inclined surface; 2, rotating cylinder; 201, annular pushing block; 2011, first annular inclined surface; 202, positioning block; 203, positioning groove; 205, rotating block; 3, second annular inclined surface; 301, extrusion inclined surface; 302, through groove. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are involved in the protection scope of the utility model.

[0022] Embodiment one:

[0023] Reference Figures 1-5 A rotating shaft of a circuit breaker comprises a plurality of sub-shafts. In order to facilitate the description, the plurality of sub-shafts are divided into a first sub-shaft 1 and a second sub-shaft 101 in the embodiment. The first sub-shaft 1 is provided with a movable rod 102 on one side. The second sub-shaft 101 is provided with a fixed rod 103 on the side close to the first sub-shaft 1. The fixed rod 103 is internally provided with a fixed groove 1031. The movable rod 102 is in sliding connection with the inner wall of the fixed rod 103. The outer surface of the movable rod 102 is provided with an annular clamping groove 1021. The outer surface of the fixed rod 103 is provided with a plurality of accommodating grooves 1041. Each accommodating groove 1041 is provided with a clamping block 104 which is in clamping connection with the annular clamping groove 1021. The outer surface of the fixed rod 103 is further provided with a fixing member for clamping the clamping block 104 with the annular clamping groove 1021 or for separating the clamping block 104 from the annular clamping groove 1021.

[0024] When a part of the rotating shaft is damaged, the worker can separate the clamping block 104 from the clamping groove through the fixing member, and then the operator can remove the damaged part. The rotating shaft is designed as the first sub-shaft 1 and the second sub-shaft 101, and the movable rod 102 and the fixed rod 103 are arranged respectively, so that each part of the rotating shaft can be replaced individually when the part is damaged. Only the first sub-shaft 1 and the second sub-shaft 101 need to be replaced, thereby reducing the maintenance cost of the rotating shaft and improving the practicability.

[0025] Specifically, the fixing member comprises a rotating cylinder 2, an annular pushing block 201 fixedly connected to the inside of the rotating cylinder 2 (the annular pushing block 201 can be integrally formed with the rotating cylinder 2 to improve the overall structural strength), the inside of one side of the rotating cylinder 2 is threadedly connected with the outer surface of a fixed rod 103, the annular pushing block 201 is arranged on the side of the rotating cylinder 2 close to the fixed rod 103, one side of the annular pushing block 201 is slidably connected with a first annular inclined surface 2011 of a clamping block 104, the inner diameter of the annular pushing block 201 is smaller than the inner diameter of the rotating cylinder 2, and one side of the clamping block 104 is in abutment with the inner wall of the annular pushing block 201.

[0026] When the first sub-shaft 1 is damaged and needs to be replaced, an operator can rotate the rotating cylinder 2 so that the rotating cylinder 2 gradually separates from the fixed rod 103, and meanwhile the annular pushing block 201 separates from the surface of the clamping block 104. Then the operator pulls the first sub-shaft 1 outward, and the first sub-shaft 1 drives the movable rod 102 to move. Since the annular pushing block 201 has separated from the surface of the clamping block 104, a certain space is formed between the clamping block 104 and the inner wall of the rotating cylinder 2, and when the movable rod 102 moves, the annular clamping groove 1021 pushes the clamping block 104 to the space between the clamping block 104 and the inner wall of the rotating cylinder 2, so that the first sub-shaft 1 can be disassembled.

[0027] When a new first sub-shaft 1 is replaced, the operator can push the movable rod 102 on the first sub-shaft 1 into the fixed groove 1031, and then rotate the rotating cylinder 2 so that the rotating cylinder 2 gradually approaches the fixed rod 103. Meanwhile, the first annular inclined surface 2011 on one side of the annular pushing block 201 gradually pushes the clamping block 104 to be clamped with the annular clamping groove 1021, until the inner wall of the annular pushing block 201 is in contact with the clamping block 104. Since the threaded connection has self-locking property, the clamping block 104 is firmly fixed in the annular clamping groove 1021 and is prevented from falling off. The threaded connection of the rotating cylinder 2 with the outer surface of the fixed rod 103 enables the rotating cylinder 2 to be connected with and separated from the fixed rod 103 through rotation, which facilitates the assembly and disassembly of the whole rotating shaft structure, and when the rotating shaft needs to be repaired or parts need to be replaced, the movable rod 102 can be easily separated from or connected with the fixed rod 103.

[0028] In order to facilitate the rotation of the rotating cylinder 2 by the staff, a rotating block 205 is fixedly connected to the outer surface of the rotating cylinder 2, and the cross section of the rotating block 205 is hexagonal in shape. The rotating block 205 in hexagonal shape facilitates the rotation operation by using a tool (such as a wrench), and can more labor-savingly and more accurately control the rotation angle of the rotating cylinder 2, so as to more accurately control the clamping and separation of the clamping block 104 and the annular clamping groove 1021, and improve the convenience and efficiency of the operation.

[0029] Secondly, the positioning block 202 is arranged on both sides of the fixed groove 1031, and the movable rod 102 is provided with the positioning groove 203 on both sides, and the positioning block 202 and the positioning groove 203 are in sliding connection. The cooperation of the positioning block 202 and the positioning groove 203 plays a role in accurate positioning and guiding during the sliding connection of the movable rod 102 and the fixed rod 103, and at the same time avoids the relative rotation of the first sub-shaft 1 and the second sub-shaft 101 during the operation of the rotating shaft, thereby improving the reliability and stability of the torque transmission of the rotating shaft during use, and ensuring the accuracy and performance of the rotating shaft during operation.

[0030] In the embodiment, the clamping block 104 is designed in a spherical shape structure, and the first inclined surface 1042 is arranged on both sides of the annular clamping groove 1021. One side of the clamping block 104 is in abutment with the first inclined surface 1042, and the second inclined surface 1043 in sliding connection with the clamping block 104 is arranged on the side of the movable rod 102 away from the first sub-shaft 1.

[0031] The clamping block 104 is designed in a spherical shape structure, so that the clamping block 104 can be smoothly clamped into the annular clamping groove 1021 under the pushing of the first annular inclined surface 2011, reducing the possibility of clamping block 104 in the rotating process. The first inclined surface 1042 and the second inclined surface 1043 are arranged to make the clamping block 104 more smooth during clamping and disengaging, reducing the possibility of clamping and wear. It is worth noting that the diameter of the clamping block 104 should be greater than the distance between the side surface of the fixed rod 103 and the rotating cylinder 2, so that when the clamping block 104 is located between the inner wall of the rotating cylinder 2 and the fixed rod 103, it will not be separated from the accommodation groove 1041.

[0032] Working principle:

[0033] When the first sub-shaft 1 is damaged and needs to be replaced, the operator can rotate the rotating cylinder 2 to gradually separate it from the fixed rod 103, and at the same time the annular pushing block 201 will be separated from the surface of the clamping block 104. Then, the operator pulls the first sub-shaft 1 outward, and the first sub-shaft 1 drives the movable rod 102 to move. Since the annular pushing block 201 has been separated from the surface of the clamping block 104, a space is formed between the clamping block 104 and the inner wall of the rotating cylinder 2, and when the movable rod 102 moves, the annular clamping groove 1021 pushes the clamping block 104 to the space between the clamping block 104 and the inner wall of the rotating cylinder 2, so that the first sub-shaft 1 can be disassembled.

[0034] When the new first sub-shaft 1 is replaced, the operator can push the movable rod 102 on the first sub-shaft 1 into the fixed slot 1031, and then rotate the rotating cylinder 2 to gradually approach the fixed rod 103. At the same time, the first annular slope 2011 on one side of the annular pushing block 201 gradually pushes the clamping block 104 to be clamped with the annular clamping groove 1021 until the inner wall of the annular pushing block 201 contacts the clamping block 104. Because the threaded connection has self-locking property, the clamping block 104 is firmly fixed in the annular clamping groove 1021 to prevent falling off. The rotating cylinder 2 is threadedly connected with the outer surface of the fixed rod 103, so that the rotating cylinder 2 can be connected and separated with the fixed rod 103 through rotation, which facilitates the assembly and disassembly of the whole rotating shaft structure, and the movable rod 102 can be separated or connected with the fixed rod 103 more easily when the rotating shaft needs to be repaired or replaced parts.

[0035] Embodiment two:

[0036] On the basis of embodiment one, referring to Figures 3-5 , the second annular slope 3 is arranged on the side of the fixed rod 103 close to the first sub-shaft 1, the extrusion slope 301 is arranged on the side of the rotating cylinder 2 away from the annular pushing block 201, and the extrusion slope 301 is in sliding connection with the second annular slope 3. The inner diameter of the extrusion slope 301 gradually increases from the side of the rotating cylinder 2 away from the annular pushing block 201 to the direction close to the annular pushing block 201. The fixed rod 103 can be made of polycarbonate, which is an engineering plastic with high toughness and good impact resistance. Its molecular chain structure endows it with the ability to restore to its original state after deformation under stress.

[0037] When the rotating cylinder 2 moves towards the fixed rod 103, the extrusion slope 301 gradually compresses the second annular slope 3, causing it to deform, thereby clamping the movable rod 102, achieving the effect of double fixation. This makes the whole rotating shaft able to withstand greater external force and torque during work, improving the stability of the rotating shaft.

[0038] When disassembly is needed, the extrusion slope 301 can be gradually separated from the second annular slope 3, and the second annular slope 3 will gradually recover the deformation.

[0039] In addition, a plurality of through grooves 302 are arranged on the outer surface of the second annular slope 3, and the through grooves 302 are arranged circumferentially with the fixed rod 103 as the center. The arrangement of the through grooves 302 makes the second annular slope 3 more easily deformed when extruded by the extrusion slope 301, so that each part more flexibly shrinks to the center, thereby more tightly fitting the movable rod 102, further improving the firmness of the connection between the fixed rod 103 and the movable rod 102.

[0040] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rotating shaft for a circuit breaker, characterized in that, The device includes a first sub-shaft (1) and a second sub-shaft (101). A movable rod (102) is provided on one side of the first sub-shaft (1), and a fixed rod (103) is provided on the side of the second sub-shaft (101) near the first sub-shaft (1). A fixed groove (1031) is provided inside the fixed rod (103). The movable rod (102) is slidably connected to the inner wall of the fixed rod (103). An annular groove (1021) is provided on the outer surface of the movable rod (102). A plurality of locking blocks (104) are provided on the outer surface of the fixed rod (103) to engage with the annular groove (1021). The outer surface of the fixed rod (103) is also provided with a fixing member for engaging the locking blocks (104) with the annular groove (1021) or disengaging the locking blocks (104) from the annular groove (1021).

2. The rotating shaft of a circuit breaker according to claim 1, characterized in that: The fixing component includes a rotating cylinder (2) and an annular push block (201) fixedly connected to the inside of the rotating cylinder (2). The inside of one side of the rotating cylinder (2) is threadedly connected to the outer surface of the fixing rod (103). The annular push block (201) is located on the side of the rotating cylinder (2) close to the fixing rod (103). One side of the annular push block (201) is slidably connected to the first annular inclined surface (2011) of the locking block (104). The inner diameter of the annular push block (201) is smaller than the inner diameter of the rotating cylinder (2). One side of the locking block (104) abuts against the inner wall of the annular push block (201).

3. The rotating shaft of a circuit breaker according to claim 2, characterized in that: The fixed groove (1031) is provided with positioning blocks (202) on both sides, and the movable rod (102) is provided with positioning grooves (203) on both sides. The positioning blocks (202) are slidably connected to the inner wall of the positioning grooves (203).

4. The rotating shaft of a circuit breaker according to claim 2, characterized in that: The locking block (104) has a spherical shape. The annular groove (1021) has a first inclined surface (1042) on both sides. One side of the locking block (104) abuts against the first inclined surface (1042). The movable rod (102) has a second inclined surface (1043) on the side away from the first sub-shaft (1) that is slidably connected to the locking block (104).

5. The rotating shaft of a circuit breaker according to claim 2, characterized in that: The outer surface of the rotating cylinder (2) is provided with a rotating block (205) fixedly connected, and the cross-section of the rotating block (205) is hexagonal.

6. The rotating shaft of a circuit breaker according to claim 2, characterized in that: The fixed rod (103) has a second annular inclined surface (3) on the side near the first sub-shaft (1), and the rotating cylinder (2) has a pressing inclined surface (301) on the side away from the annular push block (201). The pressing inclined surface (301) is slidably connected to the second annular inclined surface (3). The inner diameter of the pressing inclined surface (301) gradually increases from the side of the rotating cylinder (2) away from the annular push block (201) toward the side near the annular push block (201).

7. The rotating shaft of a circuit breaker according to claim 6, characterized in that: The outer surface of the second annular inclined surface (3) is provided with several through grooves (302), and each through groove (302) is arranged circumferentially with the fixed rod (103) as the center.

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