Split type circuit breaker propelling mechanism

Abstract

The utility model discloses a split type circuit breaker propelling mechanism, which comprises a propelling mechanism body and a position switch structure which are arranged separately, the propelling mechanism body comprises a screw rod, a screw rod frame, an interlocking square rod, and a gasket, a limiting sleeve, a limiting bracket, a crank arm and a compression spring which are sequentially arranged on the interlocking square rod in a sleeving manner; the bottoms of the crank arm and the compression spring are fixed on the interlocking square rod, and the interlocking square rod can rotate by 90 degrees; a boss is arranged at the bottom of the limiting sleeve and used for limiting the limiting support, the boss and the bottom of the compression spring are sleeved with the two ends of the limiting support respectively, and a middle connecting part of the limiting support is fixed to a breaker handcart frame; the position switch structure comprises a test position switch and a working position switch which are arranged side by side in the same direction, and a front end push plate of the test position switch or the working position switch is opposite to the crank arm. The position switch does not need to be integrally installed with the propulsion mechanism body, the appearance and the installation size can be different, and only the position switch installation plate and the limit need to be finely adjusted.

Description

A split-type circuit breaker propulsion mechanism Technical Field

[0001] This utility model belongs to the field of electrical equipment - medium voltage switch technology, and relates to a circuit breaker propulsion mechanism, particularly a split-type circuit breaker propulsion mechanism. Background Technology

[0002] The existing indoor high-voltage handcart vacuum circuit breaker achieves switching between the working and test positions using a propulsion mechanism. There are generally two installation schemes for its position changeover switch:

[0003] (1) The solution in the industry in recent years is to install the position switch directly on the propulsion mechanism. This solution often has requirements on the installation size of the position switch. Therefore, the position switch needs to be designed and used in conjunction with the propulsion mechanism.

[0004] (2) The traditional technical solution is as follows: the position switch is installed on the side of the switch cabinet housing, and the pressure plate is installed on the circuit breaker frame. The circuit breaker switches by pressing the position switch in the working position and the test position respectively.

[0005] However, the service life of circuit breakers is generally much shorter than that of switchgear frames, so on-site work often involves replacing only the circuit breakers while retaining the original switchgear.

[0006] For the traditional solution of installing position switches within the switchgear housing, replacing them with conventional circuit breakers would be problematic. Since the position switches require a matching drive mechanism, the existing position switches would be unusable, and their wiring would need to be moved from the switchgear to the circuit breaker, increasing the workload of modifying the original switchgear on-site. Furthermore, the traditional solution lacks mechanical linkage between the position switch and the drive mechanism, relying on the circuit breaker's pressure plate for switching the working position, which is unreliable. Additionally, the repeated friction and collision between the pressure plate and the position switch during the circuit breaker's rocking-in and rocking-out motion easily damages the position switch. Summary of the Invention

[0007] In response to the need for circuit breaker replacement, and without changing the switch cabinet housing and wiring principle, this utility model provides a product with a separate installation of the propulsion mechanism and the position switch, namely a split-type circuit breaker propulsion mechanism.

[0008] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0009] A split-type circuit breaker propulsion mechanism includes a separately configured propulsion mechanism body and a position switch structure. The propulsion mechanism body includes a lead screw, a lead screw frame, an interlocking square rod, and a gasket, a limiting sleeve, a limiting bracket, a crank arm, and a compression spring sequentially sleeved on the interlocking square rod. The lead screw and the interlocking square rod are vertically mounted on the lead screw frame. The bottom of the crank arm and the compression spring are fixed to the interlocking square rod, which can rotate 90 degrees. The bottom of the limiting sleeve has a boss for limiting the position of the limiting bracket. The two ends of the limiting bracket are respectively sleeved on the boss and the bottom of the compression spring. The middle connecting part of the limiting bracket is fixed to the circuit breaker trolley frame. The position switch structure is fixed to the circuit breaker trolley frame and includes a test position switch and a working position switch arranged side by side in the same direction. The front push plate of the test position switch or the working position switch is opposite to the crank arm.

[0010] Furthermore, the position switch structure includes a replaceable and adjustable mounting plate, on which the test position switch and the working position switch are provided along the length direction, and the width of the mounting plate matches the length of the limiting bracket.

[0011] Furthermore, the length of the limiting bracket is set to 57-87mm.

[0012] Furthermore, the limiting bracket is set as " "-shaped structure.

[0013] Furthermore, the crank arm is located between the boss of the limiting sleeve and the front end of the compression spring.

[0014] Furthermore, the crank arm is provided with a square hole that matches the interlocking square rod.

[0015] Furthermore, the gasket is connected to the top of the interlocking square rod using screws.

[0016] Furthermore, an interlocking key is inserted into the bottom of the interlocking rod, causing the interlocking rod to rotate 90 degrees.

[0017] Furthermore, the switch cabinet door of the circuit breaker has corresponding through holes for the lead screw and the interlocking square rod to make way for the handcart crank hole and the interlocking key hole, so as to facilitate turning the handcart crank and inserting the interlocking key respectively.

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

[0019] The present invention relates to a split-type circuit breaker propulsion mechanism, which includes a separately set position switch and a propulsion mechanism body. The position switch is switched between the working position and the test position by a crank arm, so as to achieve accurate switching.

[0020] The position switch of this utility model does not need to be installed as a whole with the propulsion mechanism body, and its shape and installation dimensions may vary. Only the position switch mounting plate and limit need to be finely adjusted, which makes it more flexible.

[0021] The split-type circuit breaker propulsion mechanism of this utility model not only adapts to different position switches on site with minimal changes to the switch cabinet, but also solves the problems of unreliability and easy damage of traditional solutions.

[0022] The split-type circuit breaker propulsion mechanism of this utility model is ingeniously designed, simple in structure, reliable, easy to operate, and highly operable. Attached Figure Description

[0023] Figure 1 is a schematic diagram of the propulsion mechanism body and position switch assembly (top view).

[0024] Figure 2 is a side view of Figure 1 (a schematic diagram of the location of the handcart crank hole and the interlocking key hole).

[0025] Figure 3 is a schematic diagram of the installation of the limiting sleeve, limiting bracket and compression spring;

[0026] Figure 4 is a schematic diagram of the limiting sleeve;

[0027] Figure 5 is a schematic diagram of the crank arm position switching switch;

[0028] Among them, 1. lead screw, 2. lead screw bracket, 3. washer, 4. interlocking square rod, 5. limit sleeve, 6. crank arm, 7. test position switch, 8. working position switch, 9. position switch mounting plate, 10. push plate, 11. compression spring, 12. interlocking key, 13. handcart crank hole, 14. interlocking key hole, 15. limit bracket. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0030] Example 1:

[0031] Referring to Figures 1 to 5, the split-type circuit breaker propulsion mechanism of this embodiment includes a propulsion mechanism body and a position switch structure, which are separately arranged.

[0032] The position switch structure includes a test position switch 7, a working position switch 8, a position switch mounting plate 9, and a push plate 10. The front ends of the test position switch 7 and the working position switch 8 are each provided with their own push plate 10. The test position switch 7 and the working position switch 8 are arranged along the length direction of the position switch mounting plate 9 and are fixed parallel to the position switch mounting plate 9.

[0033] The position switch mounting plate 9 is fixed to the circuit breaker truck frame.

[0034] In this embodiment, the width of the position switch mounting plate 9 is set to 76mm.

[0035] The propulsion mechanism body includes a lead screw 1, a lead screw frame 2, a gasket 3, an interlocking square rod 4, a limiting sleeve 5, a crank arm 6, a compression spring 11, an interlocking key 12, a handcart crank hole 13, an interlocking key hole 14, and a limiting bracket 15.

[0036] As shown in Figure 1, the lead screw frame 2 is fixed to the switch cabinet door by a telescopic locking tongue, and the lead screw 1 is connected to the lead screw frame 2. Specifically, the lead screw 1 is vertically installed on the lead screw frame 2.

[0037] A locking square rod 4 is installed on the lead screw frame 2. Specifically, the locking square rod 4 is installed vertically on the lead screw frame 2.

[0038] The bottom of the interlocking rod 4 is provided with an interlocking keyhole 14. By inserting and rotating the interlocking key 12, the interlocking rod 4 can be rotated 90 degrees.

[0039] The switch cabinet door has corresponding through holes to allow access to the handcart crank hole 13 and the interlocking key hole 14, so as to facilitate turning the handcart crank and inserting the interlocking key 12 respectively.

[0040] The interlocking square rod 4 is sequentially equipped with a washer 3, a limiting sleeve 5, a limiting bracket 15, a crank arm 6, and a compression spring 9. Specifically:

[0041] A washer 3 is provided at the top of the interlocking square rod 4, and the washer 3 is connected to the top of the interlocking square rod 4 by screws;

[0042] The limiting sleeve 5 and the compression spring 9 are sleeved on the interlocking square rod 4, with the limiting sleeve 5 located above the compression spring 9 (as shown in Figure 1).

[0043] The bottom of the limiting sleeve 5 is provided with a boss to facilitate the limiting bracket 15 to limit the position.

[0044] Limit bracket 15 is set to " The structure includes two ends and an intermediate connecting part between the ends. One end of the limiting bracket 15 is sleeved on the protrusion of the limiting sleeve 5, and the other end of the limiting bracket 15 is sleeved and fixed to the end of the compression spring 9. The intermediate connecting part of the limiting bracket 15 is fixed to the circuit breaker truck frame.

[0045] The length of the limit bracket 15 and the size (width) of the position switch mounting plate 9 are matched. The length of the limit bracket 15 is set to 57-87mm, and the length of the limit bracket 15 in this embodiment is set to 72mm.

[0046] The crank arm 6 is fixedly sleeved on the interlocking square rod 4. Preferably, the crank arm 6 has a square hole that matches the interlocking square rod 4, so that when the interlocking square rod 4 rotates, the crank arm 6 will also rotate.

[0047] The crank arm 6 is located below the aforementioned boss of the limiting sleeve 5 and between the compression spring 9, so that the subsequent push of the shim 3 to the limiting sleeve 5 and the crank arm 6 can compress the compression spring 11 and thus complete the switching of the position switch.

[0048] When there are position switches with different shapes on site, it is only necessary to adjust the length of the limit bracket 15 and the installation dimensions of the position switch mounting plate 9.

[0049] Example 2:

[0050] The switching process is completed by using the split-type circuit breaker propulsion mechanism described in Example 1, as follows:

[0051] Referring to Figure 5: This position is the circuit breaker test position. Insert the interlock key 12 and rotate it 90 degrees in direction A as shown in the figure. This will cause the interlocking rod 4 and the crank arm 6 fixed on the interlocking rod 4 to rotate 90 degrees. After the crank arm 6 rotates 90 degrees in direction A as shown in the figure, it will push the push plate 10 to move in direction B. In this way, the test position switch 7 is switched.

[0052] Turn the interlock key 12 90 degrees in the opposite direction to reset the test position switch 7.

[0053] Referring to Figure 3: When the handcart handle is cranked, the circuit breaker handcart moves to the working position. At this time, the interlocking rod 4 moves relative to the limit bracket 15 in the direction C shown in the figure (when the handcart handle is cranked, the lead screw 1 rotates, and during the rotation of the lead screw 1, the lead screw frame 2 moves back and forth. Since the interlocking rod 4 and the lead screw frame 2 are perpendicularly connected, the interlocking rod 4 also moves back and forth). When the interlocking rod 4 moves to a certain position, the shim 3 contacts the limit sleeve 5 (the interlocking rod 4 is relatively stationary relative to the switch cabinet door, and the shim 3 is relatively stationary relative to the interlocking rod 4. The direction of movement in Figure 3 is for ease of explanation; the limit sleeve 5, crank arm 6, compression spring 11, and limit bracket 15 are set as a stationary reference system. In reality, the limit sleeve 5, crank arm 6, compression spring 11, and limit bracket 15 move together with the circuit breaker handcart to the working position (opposite to direction C in Figure 3)). The interlocking rod 4 continues to move in the direction C shown in the figure, and the shim 3 pushes the limit sleeve 5 and crank arm 6 and squeezes the compression spring 11. When the circuit breaker trolley moves to the working position, the crank arm 6 is positioned directly opposite the working position switch 8. Turning the interlock key 12 90 degrees causes the crank arm 6 to also rotate 90 degrees, pushing the push plate 10 to move, and the working position switch 8 completes the switching.

[0054] When the circuit breaker is moved from the working position to the test position, the compression spring 11 releases pressure to return the crank arm 6 to the test position switch 7.

[0055] The above description is merely a preferred embodiment of the present utility model and does not constitute a limitation on the scope of protection of the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the scope of protection of the claims of the present utility model.

Claims

1. A split-type circuit breaker propulsion mechanism, characterized in that, The mechanism includes a separately configured propulsion mechanism body and a position switch structure. The propulsion mechanism body includes a lead screw, a lead screw frame, an interlocking square rod, and a washer, a limiting sleeve, a limiting bracket, a crank arm, and a compression spring sequentially sleeved on the interlocking square rod. The lead screw and the interlocking square rod are vertically mounted on the lead screw frame. The bottom of the crank arm and the compression spring are fixed to the interlocking square rod, which can rotate 90 degrees. The bottom of the limiting sleeve has a boss for limiting the position of the limiting bracket. The two ends of the limiting bracket are respectively sleeved on the boss and the bottom of the compression spring. The middle connecting part of the limiting bracket is fixed to the circuit breaker truck frame. The position switch structure is fixed to the circuit breaker truck frame and includes a test position switch and a working position switch arranged side by side in the same direction. The front push plate of the test position switch or the working position switch is opposite to the crank arm.

2. The split-type circuit breaker propulsion mechanism as described in claim 1, characterized in that, The position switch structure includes a replaceable and adjustable mounting plate, on which the test position switch and the working position switch are provided along the length direction, and the width of the mounting plate matches the length of the limit bracket.

3. The split-type circuit breaker propulsion mechanism as described in claim 2, characterized in that, The length of the limiting bracket is set to 57-87mm.

4. A split-type circuit breaker propulsion mechanism as described in any one of claims 1-3, characterized in that, The limiting bracket is set as " "-shaped structure.

5. A split-type circuit breaker propulsion mechanism as described in any one of claims 1-3, characterized in that, The crank arm is located between the boss of the limiting sleeve and the front end of the compression spring.

6. A split-type circuit breaker propulsion mechanism as described in any one of claims 1-3, characterized in that, The crank arm has a square hole that matches the interlocking square rod.

7. A split-type circuit breaker propulsion mechanism as described in any one of claims 1-3, characterized in that, The gasket is connected to the top of the interlocking square rod using screws.

8. A split-type circuit breaker propulsion mechanism as described in any one of claims 1-3, characterized in that, The interlocking key is inserted into the bottom of the interlocking rod, causing the interlocking rod to rotate 90 degrees.

9. A split-type circuit breaker propulsion mechanism as described in claim 8, characterized in that, The switch cabinet door of the circuit breaker has corresponding through holes for the lead screw and the interlocking square rod to make way for the handcart crank hole and the interlocking key hole, so as to facilitate turning the handcart crank and inserting the interlocking key respectively.

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