Opening and closing rotating mechanism for reclosing circuit breaker

Abstract

A switching-on and switching-off rotating mechanism for a reclosing circuit breaker comprises a manual operation shaft used for being operated by external force and rotating around the axis of the manual operation shaft, the manual operation shaft comprises a first shaft section and a second shaft section, the second shaft section penetrates through an upper cover to enter a shell, and the diameter of the first shaft section is larger than that of a through hole for the second shaft section to penetrate through; the free end of the first shaft section is provided with a manual shaft hole, and the tail end of the second shaft section is provided with a positioning hole; the first rotating disc is provided with a mounting hole through which the second shaft section can penetrate, and the periphery of the first rotating disc extends outwards to form at least one first linkage arm; the second rotating disc is in transmission fit with the second shaft section; and the plug pin penetrates through the positioning hole, so that the manual operation shaft, the first turntable and the second turntable form a whole. The manual opening and closing rotating mechanism is directly fixed on the upper cover, so that the manual opening and closing rotating mechanism is in transmission fit with the automatic reclosing mechanism only through the first rotating disc, other positions of the manual opening and closing rotating mechanism cannot be in contact with the automatic reclosing mechanism, misoperation is avoided, meanwhile, the installation mode is simple, and the cost is low. And the three parts are directly fixed with the upper cover through the bolts, so that subsequent replacement is facilitated.

Description

Technical Field

[0001] The utility model specifically relates to an opening and closing rotating mechanism for a reclosing circuit breaker. Background Art

[0002] Circuit breakers are often used to control the on and off of lines, and cut off the lines when faults occur to protect the lines. Reclosing devices can be used to control the opening and closing of circuit breakers. They generally drive the turntable to rotate through a motor, and synchronously drive the connecting rod linked to it to drive the handle to move.

[0003] In order to improve safety, a manual opening and closing rotating mechanism is generally provided for manually controlling the opening and closing of the circuit breaker. For example, the circuit breaker reclosing device disclosed in Chinese patent CN220474556U specifically discloses a manual mechanism, which includes a mounting plate fixedly connected to the middle cover. The mounting plate is used to fix the manual shaft between the automatic reclosing mechanism and the mounting plate. The manual shaft is fixed by the gap between the two. The fixing method is not reliable. At the same time, there is a certain amount of sticking between the two, which may cause the automatic reclosing mechanism to accidentally drive the manual mechanism to move, thereby affecting the normal operation of the reclosing mechanism. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an opening and closing rotating mechanism for a reclosing circuit breaker.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A switching mechanism for a reclosing circuit breaker, comprising:

[0007] A hand-operated shaft, used for external force operation and rotating around its own axis, and the hand-operated shaft comprises a first shaft section and a second shaft section which are connected in sequence and have decreasing outer diameters in sequence, wherein the second shaft section passes through the upper cover and enters the interior of the housing, and the diameter of the first shaft section is greater than the diameter of the through hole for the second shaft section to pass through, a hand-operated shaft hole is provided at the free end of the first shaft section, and a positioning hole is provided at the end of the second shaft section;

[0008] The first rotating disk has a mounting hole for the second shaft section to pass through, and its outer circumference extends outward to form at least a first linkage arm, and the first linkage arm can form a transmission cooperation with the automatic reclosing mechanism when operated by external force;

[0009] The second rotating disk has a limiting hole through which the second shaft segment can pass, and the limiting hole and the second shaft segment form a transmission match, and a limiting member is provided between the second rotating disk and the first rotating disk to enable the first rotating disk to synchronously drive with the second rotating disk;

[0010] The latch is arranged through the positioning hole, and enables the hand-operated shaft, the first rotating disk and the second rotating disk to form a whole.

[0011] The cross section of the second shaft segment is a non-circular cross section.

[0012] The inner diameter of the limiting hole matches the outer diameter of the second shaft segment.

[0013] The first rotating disk is provided with a notch in the circumferential direction, and the edge of the second rotating disk is provided with a limiting arm bent toward the first rotating disk, and the limiting arm and the notch form a limiting fit.

[0014] The width of the limiting arm is matched with the width of the notch.

[0015] A transition section is provided at the connection between the first linkage arm and the first rotating disk, and the transition section enables the first linkage arm and the second rotating disk to be on the same plane.

[0016] The first rotating disk is also provided with a second linkage arm, and the second linkage arm is arranged opposite to the first linkage arm and is on the same axis.

[0017] The latch is formed by two semicircular pins being bent toward each other and combined to form a circular pin, and one end of the circular pin forms an operating ring.

[0018] The beneficial effects of the utility model are as follows: the manual separation and combination rotating mechanism is directly fixed on the upper cover, so that it cooperates with the automatic reclosing mechanism only through the first turntable transmission, and thus other positions of the manual separation and combination rotating mechanism will not contact the automatic reclosing mechanism, thereby avoiding misoperation; at the same time, its installation method is simple, and the three are directly fixed together with the upper cover through a latch, which is convenient for subsequent replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a schematic diagram of the structure of a circuit breaker.

[0020] Figure 2 The utility model is applied to the internal schematic diagram of a circuit breaker.

[0021] Figure 3 It is a schematic diagram of the cooperation between the utility model and the upper cover.

[0022] Figure 4 It is a partial schematic diagram of the cooperation between the utility model and the automatic overlap mechanism.

[0023] Figure 5 It is a cross-sectional schematic diagram of the installation location of the utility model and the upper cover.

[0024] Figure 6 It is a cross-sectional view of the utility model.

[0025] Figure 7 It is an explosion diagram of the utility model. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] As shown in the figure, the utility model discloses an opening and closing rotating mechanism 3 for a reclosing circuit breaker, which is mainly used for manual opening and closing operations, and includes a manual operating shaft, a first rotating disk, a second rotating disk and a latch for fixing the three together.

[0029] The manual shaft 31 is used for external force operation and rotation around its own axis, and the manual shaft includes a first shaft segment 311 and a second shaft segment 312 which are connected in sequence and have decreasing outer diameters, wherein the second shaft segment passes through the upper cover 1 and enters the interior of the shell, and the diameter of the first shaft segment is larger than the diameter of the through hole for the second shaft segment to pass through. Since the first shaft segment is larger than the diameter of the through hole, the first shaft segment will be limited after the second shaft segment passes through, and a manual shaft hole 3111 is provided at the free end of the first shaft segment, and the manual shaft hole is for external force operation. Further, the manual shaft hole is a polygonal hole, and a positioning hole is provided at the end of the second shaft segment, which is exposed to the outside after the manual shaft passes through the upper cover, the first turntable and the second turntable in sequence, so as to facilitate the insertion of a latch to lock the three. Since the first shaft segment is limited by the upper side of the upper cover, the second shaft segment and the first turntable and the second turntable are limited by the latch, so that the three are fixed to the upper cover.

[0030] The first turntable 32 has a mounting hole 323 for the second shaft section to pass through, and its outer circumference extends outward to form at least a first linkage arm 321, which can form a transmission cooperation with the automatic reclosing mechanism 2 when operated by external force. Furthermore, it is also provided with a second linkage arm 324, wherein the first linkage arm can be driven by the second turntable to form a transmission cooperation with the linkage shaft 21 of the automatic reclosing mechanism when the hand-operated shaft rotates, thereby driving it to open or close the gate.

[0031] The second turntable 33 has a limiting hole 332 for the second shaft segment to pass through, and the limiting hole and the second shaft segment form a transmission fit. Furthermore, the cross-section of the second shaft segment is a non-circular cross-section, and the inner diameter of the limiting hole matches the outer diameter of the second shaft segment. The design of the non-circular shaft can make the second turntable rotate synchronously with the hand-operated shaft, and a limiting member is provided between the second turntable and the first turntable for making the first turntable synchronously drive with the second turntable. The design of the limiting member enables the second turntable to drive the first turntable to rotate synchronously.

[0032] The latch 34 is set through the positioning hole 3121, and makes the hand-operated shaft, the first turntable and the second turntable form a whole. Furthermore, the latch is formed by two semicircular pins bending towards each other and merging into a circular pin, and one end of the circular pin forms an operating ring 341. The existence of the operating ring can make it rotate relative to each other, so that the first turntable and the second turntable fit more closely, and it is also convenient for subsequent disassembly.

[0033] A notch 325 is provided in the circumference of the first turntable, and a limit arm 331 bent toward the first turntable is provided on the edge of the second turntable. The limit arm and the notch form a limit fit, and the width of the limit arm is adapted to the width of the notch. The movement of the second turntable is transmitted to the first turntable by utilizing the limit fit between the limit arm and the notch, so that the two rotate synchronously.

[0034] A transition section 322 is provided at the connection between the first linkage arm and the first turntable, and the transition section enables the first linkage arm and the second turntable to be on the same plane, thereby enabling the first linkage arm to better trigger the linkage axis of the automatic overlap mechanism.

[0035] The first rotating disk is further provided with a second linkage arm 324, and the second linkage arm is arranged opposite to the first linkage arm and is located on the same axis.

[0036] The embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A switching mechanism for a reclosing circuit breaker, characterized in that: It includes: A hand-operated shaft, used for external force operation and rotating around its own axis, and the hand-operated shaft comprises a first shaft section and a second shaft section which are connected in sequence and have decreasing outer diameters in sequence, wherein the second shaft section passes through the upper cover and enters the interior of the housing, and the diameter of the first shaft section is greater than the diameter of the through hole for the second shaft section to pass through, a hand-operated shaft hole is provided at the free end of the first shaft section, and a positioning hole is provided at the end of the second shaft section; The first rotating disk has a mounting hole for the second shaft section to pass through, and its outer circumference extends outward to form at least a first linkage arm, and the first linkage arm can form a transmission cooperation with the automatic reclosing mechanism when operated by external force; The second rotating disk has a limiting hole through which the second shaft segment can pass, and the limiting hole and the second shaft segment form a transmission match, and a limiting member is provided between the second rotating disk and the first rotating disk to enable the first rotating disk to synchronously drive with the second rotating disk; The latch is arranged through the positioning hole, and enables the hand-operated shaft, the first rotating disk and the second rotating disk to form a whole.

2. The on-off rotating mechanism for a reclosing circuit breaker according to claim 1, characterized in that: The cross section of the second shaft segment is a non-circular cross section.

3. The on-off rotating mechanism for a reclosing circuit breaker according to claim 2, characterized in that: The inner diameter of the limiting hole matches the outer diameter of the second shaft segment.

4. The on-off rotating mechanism for a reclosing circuit breaker according to claim 2, characterized in that: The first rotating disk is provided with a notch in the circumferential direction, and the edge of the second rotating disk is provided with a limiting arm bent toward the first rotating disk, and the limiting arm and the notch form a limiting fit.

5. The on-off rotating mechanism for a reclosing circuit breaker according to claim 4, characterized in that: The width of the limiting arm is matched with the width of the notch.

6. The on-off rotating mechanism for a reclosing circuit breaker according to claim 1, characterized in that: A transition section is provided at the connection between the first linkage arm and the first rotating disk, and the transition section enables the first linkage arm and the second rotating disk to be on the same plane.

7. The on-off rotating mechanism for a reclosing circuit breaker according to claim 1 or 6, characterized in that: The first rotating disk is also provided with a second linkage arm, and the second linkage arm is arranged opposite to the first linkage arm and is on the same axis.

8. The on-off rotating mechanism for a reclosing circuit breaker according to claim 1, characterized in that: The latch is formed by two semicircular pins being bent toward each other and combined to form a circular pin, and one end of the circular pin forms an operating ring.

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