A clamping fixture for contacts of pole-mounted circuit breakers

Abstract

This utility model relates to the field of circuit breaker processing technology, and in particular to a clamping fixture for pole-mounted circuit breaker contacts. It includes a support frame, on which a fixture mechanism is mounted for clamping contacts. The fixture mechanism includes: a main body assembly, comprising a base fixed to the top of the support frame, side frames fixed at both ends of the base top, a balance bar fixed between the two side frames, several slide blocks slidably mounted on the balance bar, a cam rotatably mounted at the front end of each slide block, a first cylinder mounted at the bottom of the base, a guide frame fixed at the output end of the first cylinder, and symmetrically distributed grooves inside the guide frame, with the cam located inside the grooves; and a clamping assembly mounted on the main body assembly for contact positioning. A synchronous adjustment mechanism enables multi-station equidistant adaptation, and in conjunction with a precision clamping device, it can quickly and accurately clamp contacts of different specifications, ensuring clamping stability while avoiding damage to the contact surface, significantly improving the efficiency of pole-mounted circuit breaker contact installation and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker processing technology, specifically to a clamping fixture for contacts of pole-mounted circuit breakers. Background Technology

[0002] Pole-mounted circuit breakers are crucial devices in power systems for line protection and control. Their contacts, as key conductive components, are responsible for connecting and disconnecting current. Accurate contact positioning and reliable clamping are fundamental conditions for ensuring the normal operation of the circuit breaker during the installation and maintenance of power equipment.

[0003] According to the publicly available publication number CN212874358U, this technology discloses "a processing and clamping device for circuit breaker contacts, including a support plate, an extension plate movably mounted on the upper end of the support plate, a support base fixedly mounted on the lower end of the support plate, a support leg fixedly mounted on the lower end of the support base, the support plate and the extension plate forming a frame structure, support plates fixedly mounted on the left and right ends of the bottom inner side of the support plate, a fixing plate fixedly mounted on the upper end of the support plate, a groove provided on the upper end of the fixing plate, telescopic rods fixedly mounted on the left and right ends of the extension plate, a fixing collar fixedly mounted between the telescopic rod and the outer side of the extension plate, a connecting rod movably mounted on the inner side of the telescopic rod, and a clamping collar mounted on the left end of the connecting rod." This technology offers the following technical benefits: "Workers can adjust the clamping force of the circuit breaker contacts using their own strength, thereby reducing the damage rate of the circuit breaker contacts and improving the clamping effect of the device."

[0004] Existing pole-mounted circuit breaker contact clamping devices suffer from insufficient clamping accuracy during operation. Due to the lack of an effective synchronous adjustment mechanism, it is difficult for multiple clamping points to maintain uniform clamping force and precise centering position. When clamping contacts of different specifications, it is easy to experience insecure clamping or uneven force, which in turn affects the installation quality and performance of the contacts. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a clamping fixture for pole-mounted circuit breaker contacts. Through a synchronous adjustment mechanism, it achieves multi-station equidistant adaptation. Combined with a precision clamping device, it can quickly and accurately clamp contacts of different specifications, ensuring clamping stability while avoiding damage to the contact surface, thus significantly improving the efficiency of pole-mounted circuit breaker contact installation and maintenance.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a clamping fixture for contacts of a pole-mounted circuit breaker, comprising a support, wherein a fixture mechanism is provided on the support for clamping the contacts, and the fixture mechanism includes:

[0007] The main component includes a base fixed to the top of the bracket, side frames fixed at both ends of the top of the base, a balance bar fixed between the two side frames, several slide blocks slidably mounted on the balance bar, a cam rotatably mounted at the front end of the slide blocks, a first cylinder mounted at the bottom of the base, a guide frame fixed at the output end of the first cylinder, symmetrically distributed slide grooves opened inside the guide frame, and the cam located inside the slide groove.

[0008] A clamping assembly is mounted on the main body assembly and is used to position the contacts.

[0009] Preferably, the clamping assembly includes a shaft frame fixed to the upper end of the slide block, a lower positioning head fixed to the top of the front end of the shaft frame, a clamping arm pivotally connected to the front of the upper end of the shaft frame via a connector, an upper positioning head fixed to the bottom of the clamping arm, and a second cylinder pivotally connected to the rear of the upper end of the shaft frame, with the output end of the second cylinder pivotally connected to the upper end of the clamping arm.

[0010] Preferably, the main body component further includes a guide rail fixed to the front end of the side frame, a slider slidably mounted on the guide rail, and a guide frame fixed on the slider.

[0011] Preferably, the fixture mechanism further includes a base disposed below the support, a rotary cylinder is mounted on the top of the base, and the support is fixed to the output end of the rotary cylinder.

[0012] Preferably, the contact surface between the cam and the slide is provided with a wear-resistant coating.

[0013] Preferably, the clamping surfaces of the lower positioning head and the upper positioning head are provided with anti-slip textures.

[0014] Beneficial effects

[0015] This utility model provides a clamping fixture for the contacts of a pole-mounted circuit breaker. Compared with the prior art, it has the following advantages:

[0016] 1. The guide frame is driven to rise and fall by the output end of the first cylinder. The guide frame, through a sliding groove and a cam, drives the slide block to slide along the balance bar, thereby synchronously adjusting the clamping components on each slide block to move synchronously and equidistantly. This can accurately adapt to the clamping requirements of different specifications of contacts, while maintaining the centering and consistency of each clamping point. This structure not only improves the versatility and adjustment efficiency of the fixture.

[0017] 2. Place the contact on the lower positioning head, and then drive the clamping arm with the connecting piece through the output end of the second cylinder to clamp the contact on the lower positioning head with the upper positioning head; it is especially suitable for the contact clamping operation of pole-mounted circuit breakers that require high-precision positioning, which not only ensures the stability and reliability of the clamping process, but also avoids damage to the contact surface. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the front end of the main component in this utility model;

[0020] Figure 3 This is a schematic diagram of the rear structure of the main component in this utility model;

[0021] Figure 4 This is a schematic diagram of the clamping assembly in this utility model.

[0022] In the diagram: 1. Support; 2. Fixture mechanism; 21. Main component; 211. Base; 212. Side frame; 213. Balance bar; 214. Slide; 215. Cam; 216. First cylinder; 217. Guide frame; 218. Slide groove; 219. Guide rail; 2110. Slider; 22. Clamping assembly; 221. Shaft frame; 222. Lower positioning head; 223. Connector; 224. Clamping arm; 225. Upper positioning head; 226. Second cylinder; 23. Base; 24. Rotary cylinder. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 - Figure 4 This utility model provides a technical solution: a clamping fixture for contacts of a pole-mounted circuit breaker, including a bracket 1, on which a fixture mechanism 2 is provided for clamping the contacts, the fixture mechanism 2 including:

[0025] The main component 21 includes a base 211 fixed to the top of the bracket 1. Side frames 212 are fixed at both ends of the top of the base 211. A balance bar 213 is fixed between the two side frames 212. Several slide blocks 214 are slidably installed on the balance bar 213. A cam 215 is rotatably installed at the front end of the slide block 214. A first cylinder 216 is installed at the bottom of the base 211. A guide frame 217 is fixed at the output end of the first cylinder 216. A symmetrically distributed slide groove 218 is opened inside the guide frame 217, and the cam 215 is located inside the slide groove 218.

[0026] Clamping assembly 22 is disposed on main body assembly 21 and used for positioning the contact.

[0027] In this embodiment, the guide frame 217 is driven to rise and fall by the output end of the first cylinder 216. The guide frame 217, through the slide groove 218 and in conjunction with the cam 215, drives the slide block 214 to slide along the balance bar 213, thereby synchronously adjusting the clamping components 22 on each slide block 214 to move synchronously and equidistantly. This can accurately adapt to the clamping requirements of different specifications of contacts, while maintaining the centering and consistency of each clamping point. This structure not only improves the versatility and adjustment efficiency of the fixture.

[0028] Specifically, the clamping assembly 22 includes a shaft frame 221 fixed to the upper end of the slide block 214. A lower positioning head 222 is fixed to the top front end of the shaft frame 221. A clamping arm 224 is pivotally connected to the front upper end of the shaft frame 221 via 2223. An upper positioning head 225 is fixed to the bottom of the clamping arm 224. A second cylinder 226 is pivotally connected to the rear upper end of the shaft frame 221, and the output end of the second cylinder 226 is pivotally connected to the upper end of the clamping arm 224.

[0029] In this embodiment, the contact is placed on the lower positioning head 222, and then the output end of the second cylinder 226 drives the clamping arm 224 to cooperate with the connector 223 to drive the upper positioning head 225 to clamp the contact on the lower positioning head 222. This is particularly suitable for the contact clamping operation of pole-mounted circuit breakers that require high-precision positioning, which not only ensures the stability and reliability of the clamping process, but also avoids damage to the contact surface.

[0030] Specifically, the main component 21 also includes a guide rail 219 fixed to the front end of the side frame 212, a slider 2110 slidably mounted on the guide rail 219, and a guide frame 217 fixed on the slider 2110.

[0031] In this embodiment, the guide frame 217 is ensured to maintain a stable linear motion trajectory, effectively preventing deviation or jamming caused by uneven force.

[0032] Specifically, the fixture mechanism 2 also includes a base 23 located below the support 1, a rotary cylinder 24 mounted on the top of the base 23, and the support 1 fixed to the output end of the rotary cylinder 24.

[0033] In this embodiment, the output end of the rotary cylinder 24 drives the bracket 1 to rotate in conjunction with the main body component 21, thereby rotating the contact clamped on the clamping component 22. This allows the operator to adjust the contact to the optimal working angle according to actual work requirements, greatly improving the convenience of installation and maintenance.

[0034] Specifically, the contact surface between the cam 215 and the slide 218 is provided with a wear-resistant coating.

[0035] In this embodiment, the coating uses a metal-ceramic composite material to form a dense protective layer through plasma spraying to prevent jamming after long-term, high-frequency use.

[0036] Specifically, the clamping surfaces of the lower positioning head 222 and the upper positioning head 225 are provided with anti-slip textures.

[0037] In this embodiment, the anti-slip texture generates multi-directional frictional force, effectively preventing the contact from sliding axially or rotating circumferentially during clamping, ensuring that the contact always remains precisely aligned.

[0038] The working principle and usage process of this utility model are as follows: First, the guide frame 217 is driven to rise and fall by the output end of the first cylinder 216. The guide frame 217, through the sliding groove 218 and the cam 215, drives the slide block 214 to slide along the balance bar 213, thereby synchronously adjusting the clamping components 22 on each slide block 214 to move synchronously and equidistantly. This can accurately adapt to the clamping requirements of different specifications of contacts, while maintaining the centering and consistency of each clamping point. This structure not only improves the versatility and adjustment efficiency of the fixture, but also...

[0039] Then, the contact is placed on the lower positioning head 222, and the output end of the second cylinder 226 drives the clamping arm 224 to work with the connecting piece 223 to drive the upper positioning head 225 to clamp the contact on the lower positioning head 222. This is particularly suitable for clamping the contacts of pole-mounted circuit breakers that require high-precision positioning, ensuring the stability and reliability of the clamping process while avoiding damage to the contact surface. Furthermore, the output end of the rotary cylinder 24 drives the bracket 1 to work with the main body assembly 21 to rotate the contacts clamped on the clamping assembly 22. This allows the operator to adjust the contacts to the optimal working angle according to actual operating needs, greatly improving the convenience of installation and maintenance.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clamping fixture for contacts of a pole-mounted circuit breaker, comprising a support (1), characterized in that: The bracket (1) is provided with a fixture mechanism (2) for clamping the contact. The fixture mechanism (2) includes: The main component (21) includes a base (211) fixed to the top of the bracket (1), side frames (212) fixed at both ends of the top of the base (211), a balance bar (213) fixed between the two side frames (212), a number of slide blocks (214) slidably mounted on the balance bar (213), a cam (215) rotatably mounted at the front end of the slide block (214), a first cylinder (216) mounted at the bottom of the base (211), a guide frame (217) fixed at the output end of the first cylinder (216), a symmetrically distributed slide groove (218) opened inside the guide frame (217), and the cam (215) located inside the slide groove (218); A clamping assembly (22) is disposed on the main body assembly (21) and is used for positioning the contacts.

2. A clamping fixture for contacts of a pole-mounted circuit breaker according to claim 1, characterized in that: The clamping assembly (22) includes a shaft frame (221) fixed to the upper end of the slide (214). A lower positioning head (222) is fixed to the top of the front end of the shaft frame (221). A clamping arm (224) is pivotally connected to the front of the upper end of the shaft frame (221) via a connector (223). An upper positioning head (225) is fixed to the bottom of the clamping arm (224). A second cylinder (226) is pivotally connected to the rear of the upper end of the shaft frame (221), and the output end of the second cylinder (226) is pivotally connected to the upper end of the clamping arm (224).

3. A clamping fixture for contacts of a pole-mounted circuit breaker according to claim 1, characterized in that: The main component (21) also includes a guide rail (219) fixed to the front end of the side frame (212), a slider (2110) is slidably mounted on the guide rail (219), and a guide frame (217) is fixed on the slider (2110).

4. A clamping fixture for contacts of a pole-mounted circuit breaker according to claim 1, characterized in that: The fixture mechanism (2) also includes a base (23) located below the bracket (1), a rotary cylinder (24) is installed on the top of the base (23), and the bracket (1) is fixed to the output end of the rotary cylinder (24).

5. A clamping fixture for contacts of a pole-mounted circuit breaker according to claim 1, characterized in that: The contact surface between the cam (215) and the slide (218) is provided with a wear-resistant coating.

6. A clamping fixture for contacts of a pole-mounted circuit breaker according to claim 2, characterized in that: The clamping surfaces of the lower positioning head (222) and the upper positioning head (225) are provided with anti-slip textures.

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