Integrated distribution box and mechanical locking device

Abstract

The present application relates to the technical field of mechanical locking device, specifically relates to a comprehensive distribution box and a mechanical locking device, the locking device comprises a distribution box, a cover plate, a handle, a rotating disc and a frame, the rotating disc has two locking grooves in the circumferential direction, each locking groove corresponds to a preset locking point, a push mechanism is arranged below the locking groove, the push mechanism comprises a top column, a locking block and a driving part, the locking block is fixed on the top of the top column and is matched with the locking groove, the bottom of the top column is elastically connected with the frame in the longitudinal direction, the locking block is embedded in the locking groove, and the rotation of the rotating disc is restricted. Through the rotation of the power wheel, the locking block is promoted to move longitudinally and reciprocally, so that when moving downward, the locking block is separated from the locking groove and the upward movement of the locking block is limited, the locking block is prevented from contacting the friction area, the locking block abuts against the inner wall of the locking groove when moving upward, the rotating disc is corrected, so that the combination of the locking groove and the locking block is realized, and the loosening phenomenon is prevented.

Description

Technical Field

[0001] This invention relates to the field of mechanical interlocking devices, and more specifically, to integrated distribution boxes and mechanical interlocking devices. Background Technology

[0002] Mechanical interlocking devices are important devices to ensure the safe operation of power systems. Their principle is mainly based on mechanical interlocking to prevent misoperation that could cause the isolating switch to open or close at the wrong time. The purpose of the interlocking is to prevent misoperation of the isolating switch during the operation and maintenance of power equipment, such as opening or closing the isolating switch when the equipment is under load, or accidentally entering a live compartment when the busbar is not grounded, thereby avoiding accidents such as electrical faults, equipment damage, and personal injury.

[0003] In high-voltage switchgear / boxes, a mechanical interlock is often installed between the isolating switch and the circuit breaker. When the circuit breaker is closed, its mechanical transmission components restrict the operating mechanism of the isolating switch, preventing it from being opened or closed. This mechanical restriction is released only after the circuit breaker is opened, allowing the isolating switch to be operated. This ensures that the isolating switch will not be opened or closed while the equipment is under load.

[0004] When the operator closes or opens the circuit breaker, they need to first release the locking device of the control turntable, disengaging the locking device from the turntable, and then rotate the turntable to perform the above operations. 1. However, when the operator moves the locking mechanism downwards while rotating the turntable, once the locking groove rotates away from the locking block, the locking mechanism is released. Under the elastic force, the locking block is driven upwards, resulting in wear between the locking block and the outer wall of the turntable. That is, the narrow end of the locking block deforms and cannot match the locking groove.

[0005] 2. Because the locking block is usually narrow at the top and wide at the bottom, when rotated to the position shown in the instruction manual... Figure 9 In the state shown, although most of the locking block has extended into the locking groove, the inner wall of the locking groove in this state obstructs one side wall of the locking block, thereby restricting the reset of the locking block and causing the two to be unable to match. Summary of the Invention

[0006] The present invention provides a mechanical locking device, which causes the locking block to move longitudinally and reciprocally through the rotation of the power wheel, thereby solving the problem mentioned in the background art, namely: the locking block cannot match the locking groove.

[0007] In order to achieve the above object, the mechanical locking device comprises a distribution box, a cover plate, a handle, a rotating disc and a frame fixed in the distribution box, the rotating disc is provided with two locking grooves in the circumferential direction, each locking groove corresponds to a preset locking point, a pushing mechanism is arranged below the locking groove, the pushing mechanism comprises a top column, a locking block and a driving part, the locking block is fixed on the top of the top column and is matched with the locking groove, the bottom of the top column is elastically connected with the frame in the longitudinal direction, and in the normal state, the locking block is embedded in the locking groove to restrict the rotation of the rotating disc;

[0008] The driving part drives the locking block to move up and down according to the rotating phase of the rotating disc, so that the locking block is separated from one of the locking grooves and matched with the other locking groove, when the rotating disc rotates, the top column moves downward to drive the locking block to separate from the locking groove, so that the rotating disc and the locking block do not form friction when the rotating disc rotates, when the other locking groove rotates to correspond to the locking block, the locking block moves upward and abuts against the inner wall of the locking groove, until the locking block is completely embedded in the locking groove, so as to align the rotating disc to the preset locking point.

[0009] A sliding rod is fixedly arranged at the bottom of the top column, the sliding rod penetrates through the frame and is movably arranged thereon, a compression spring is sleeved on the sliding rod between the top column and the frame, a vertical rod is fixedly arranged between the top of the locking block and the top column, a horizontal plate fixed to the frame is slidably arranged on the vertical rod, and a push rod is fixed on the vertical rod.

[0010] The driving part comprises a power wheel, the power wheel is arranged on one side of the locking block and has a hollow shape in the middle, the circumferential direction of the power wheel and the inner wall of the hollow are provided with tooth grooves, and the outer tooth grooves are engaged with the top column.

[0011] A rotating ring penetrating through the cover plate is fixedly arranged on one side of the power wheel, the rotating ring is rotatably connected with the cover plate, so as to drive the top column to move up and down by rotating, and force the locking block to separate from or combine with the locking groove.

[0012] A friction area is formed on the arc length of the rotating disc between the two locking grooves, the friction area is the arc surface between the two locking grooves on the rotating disc, when the locking block separates from the locking groove, the top of the locking block is lower than one of the locking grooves of the rotating disc in the horizontal direction, so that the locking block is away from the locking groove.

[0013] Compared with the prior art, the mechanical locking device has the following advantages:

[0014] In the mechanical locking device, the rotation of the power wheel promotes the longitudinal reciprocating movement of the locking block, so that when the locking block moves downward, the locking block separates from the locking groove and limits the upward movement of the locking block, preventing the locking block from contacting the friction area, and when the locking block moves upward, the locking block abuts against the inner wall of the locking groove to correct the rotating disc, so as to realize the combination of the locking groove and the locking block and prevent loosening. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Fig. 1 is a schematic diagram of the overall structure of the present application;

[0016] Figure 2 Fig. 2 is a schematic diagram of the front surface of the cover plate of the present application;

[0017] Figure 3 Fig. 3 is a schematic diagram of the back surface of the cover plate of the present application;

[0018] Figure 4 Fig. 4 is a schematic diagram of the locking block and locking groove of the present application;

[0019] Figure 5 Fig. 5 is a schematic diagram of the longitudinal movement principle of the top post of the present application;

[0020] Figure 6 Fig. 6 is a schematic diagram of the disengagement of the locking block and locking groove of the present application;

[0021] Figure 7 Fig. 7 is a schematic diagram of the abutment of the locking block and locking groove of the present application;

[0022] Figure 8 Fig. 8 is a schematic diagram of the constraint and release principle of the stop teeth pair and power wheel of the present application;

[0023] Figure 9 Fig. 9 is an enlarged schematic diagram of A in the present application. Figure 5

[0024] The meanings of the various reference numerals in the drawings are as follows:

[0025] 100, distribution box; 101, cover plate; 102, handle; 103, rotating disc; 104, contact; 105, pin shaft;

[0026] 110, frame; 111, cross plate; 112, support plate;

[0027] 120, pushing mechanism; 121, top post; 122, locking block; 123, power wheel; 124, sliding rod; 125, compression spring; 126, rotating ring; 127, lever;

[0028] 130, support shaft;

[0029] 140, stop teeth; 141, tab; 142, auxiliary rod; 143, movable rod; 144, return spring. DETAILED DESCRIPTION

[0030] ​The technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0031] In view of the problems that the lock block is worn and the locking groove and the lock block cannot match, the mechanical locking device is shown in the present application, as shown in Figures 1-3 The mechanical locking device includes a distribution box 100, a cover plate 101, a handle 102, a rotating disc 103, and a frame 110 fixed in the distribution box 100. The rotating disc 103 is provided with a contact 104. The frame 110 is fixed with a pin shaft 105 penetrating the rotating disc 103. The pin shaft 105 is rotationally connected with the rotating disc 103, Figure 2 The operation information is displayed on the outer panel of the cover plate 101. When the corresponding operation is performed, the operation is gradually performed according to the use steps. Since it belongs to the prior art, it will not be described in detail here. The rotating process of the rotating disc 103 will be described in detail below.

[0032] First, the rotating disc 103 has two locking grooves in the circumferential direction. Each locking groove corresponds to a preset locking point (such as Figure 6 The locking point S1 and S2). A push mechanism 120 is arranged below the locking groove. The push mechanism 120 includes a top column 121, a locking block 122, and a driving part. The locking block 122 is fixed on the top of the top column 121 and is matched with the locking groove. The bottom of the top column 121 is elastically connected with the frame 110 in the longitudinal direction. In the normal state, the locking block 122 is embedded in the locking groove to realize the constraint of the rotation of the rotating disc 103. Specifically, the locking block 122 can always keep the constraint of the locking groove because the sliding rod 124 is fixedly arranged at the bottom of the top column 121. The sliding rod 124 penetrates the frame 110 and is movably arranged with the frame 110. In this way, it is ensured that the top column 121 can only move up and down in the longitudinal direction when moving. The compression spring 125 is sleeved on the sliding rod 124 between the top column 121 and the frame 110. The compression spring 125 is used to support the top column 121 to keep the locking block 122 from rotating the rotating disc 103 under the condition that the rotating disc 103 is not rotated, so as to limit the rotation of the rotating disc 103.

[0033] Secondly, the locking block 122 top and the top column 121 are provided with a vertical rod, the vertical rod connects the two, and a horizontal plate 111 is sleeved on the vertical rod and fixed with the frame 110, the horizontal plate 111 can maintain the stability of the up-down movement of the top column 121, so that the top column 121 is accurately moved into the locking groove and matched with the locking groove. In use, the operator moves the locking block 122 downward by rotating the lever 127 on one side of the sliding rod 124, and the locking block 122 moves downward to compress the compression spring 125, and when it rotates to the preset locking point, the lever 127 is released, and the top column 121 is pushed out upward under the elastic action of the compression spring 125, so that the locking block 122 extends into the locking groove to limit the rotation of the rotating disc 103.

[0034] Combining Figure 4 As shown in the figure, the driving part drives the locking block 122 to reciprocate up and down according to the rotating phase of the rotating disc 103, so that the locking block 122 is separated from one of the locking grooves and matched with the other locking groove. When the rotating disc 103 rotates, the top column 121 moves downward to drive the locking block 122 to separate from the locking groove, so that the rotating disc 103 and the locking block 122 do not form friction when the rotating disc 103 rotates. When the other locking groove rotates to correspond to the locking block 122, the locking block 122 moves upward and abuts against the inner wall of the locking groove, until the locking block 122 is completely embedded in the locking groove, so as to correct the rotating disc 103 to the preset locking point.

[0035] For easy understanding, the second embodiment of the present application (the second way of realizing the combination of the locking block 122 and the locking groove) is shown below. When the top column 121 is in the state shown in Figure 4 The structure of the driving part is disclosed. The driving part includes Figure 5 the power wheel 123 in the figure, the power wheel 123 is provided on one side of the top column 121 and the middle part is hollow, the outer ring and the hollow part of the power wheel 123 are provided with tooth grooves, and the outer tooth grooves are engaged with the top column 121; and one side of the top column 121 is fixedly provided with a rotating ring 126 penetrating the cover plate 101, the rotating ring 126 is rotatably connected with the cover plate 101, and one side of the rotating ring 126 has a rotating disc; in implementation, referring to Figure 5 As shown in the figure, the power wheel 123 rotates counterclockwise to drive the top column 121 to move downward, and the locking block 122 separates from the locking groove in the F1 direction. On the contrary, when the power wheel 123 rotates clockwise, one of the locking grooves is away from the locking block 122, and the other rotates to be close to the locking block 122, and the locking block 122 moves upward in the F2 direction and matches with the locking groove; that is, the rotating disc drives the power wheel 123 to rotate, so as to drive the locking block 122 to move up and down, so that the locking block 122 separates from or combines with the locking groove.

[0036] First of all, it should be understood that the rotating disc 103 forms a friction zone on the arc length between the two locking grooves (refer to Figure 6As shown, the friction zone is the arc surface corresponding to the two locking grooves on the rotating disk 103. When the locking block 122 disengages from the locking groove, the top of the locking block 122 is horizontally lower than one of the locking grooves of the rotating disk 103 (see reference). Figure 6 As shown by the horizontal line, when the rotating disk 103 rotates, the locking block 122 moves away from the locking groove, so that the locking block 122 will not contact the arc surface of the friction area, thereby avoiding friction between the two and causing wear.

[0037] Meanwhile, since the rotating disk 103 is released first and then rotated, finally releasing the rotating ring 126, the operator's hand is disengaged from the rotating disk. Under the elastic action of the compression spring 125, the top post 121 is pushed upward, causing the locking block 122 to extend into the locking groove. This prevents the operator's hand from continuously applying force to the rotating ring 126, reducing the operator's workload. At the same time, the upward movement of the top post 121 also drives the power wheel 123 to rotate clockwise. That is, the locking block 122 needs to overcome the friction force driving the power wheel 123 to rotate before it can extend into the locking groove. The power wheel 123 thus slows down the upward movement speed of the top post 121, reducing the contact time between the locking block 122 and the friction area.

[0038] When the rotating disk 103 rotates to Figure 7 In the state shown, only part of the locking block 122 is located in the locking groove. At this time, the inner wall of the locking groove forms a block against the locking block 122. The elastic potential energy stored by the compression spring 125 alone is not enough to make the locking block 122 completely engage with the locking groove. Therefore, after each release of the rotating ring 126, the locking block 122 is pushed upward again by rotating the turntable a second time. Under the action of the locking block 122, pressure is applied to the inner wall of the locking groove, causing the locking groove to rotate until it matches the locking block 122.

[0039] It should be understood that the compression spring 125 acts first after releasing the rotating ring 126, providing the basic locking force (i.e., automatic locking) to move the locking block 122 towards the locking groove. However, due to the influence of the rotation angle of the rotating disk 103 during actual use, when... Figure 7 In the indicated state, the compression spring 125 alone cannot fully engage the locking block 122 with the locking groove. In this case, the "secondary rotating disk 103" is designed to remedy the locking failure; by rotating the disk 103, the position of the locking block 122 can be finely adjusted to ensure a complete engagement with the locking groove. This process is an optimization and auxiliary design made after comprehensively considering various uncertainties in actual use, aiming to improve the reliability and stability of the locking. The "secondary rotating disk 103" and the compression spring 125 complement each other to achieve reliable locking.

[0040] That is, through the rotating action of the power wheel 123, the locking block 122 is prompted to move longitudinally and reciprocally, so that when it moves downward, the locking block 122 is separated from the locking groove and restricted from moving upward, preventing the locking block 122 from contacting the friction area, and when the locking block 122 moves upward, it abuts against the inner wall of the locking groove, correcting the rotating disc 103, so as to realize the combination of the locking groove and the locking block 122, preventing loosening.

[0041] Further, considering that the operator's hand needs to hold the rotating disc all the time after the compression spring 125 is compressed, in order to relieve the pressure on the hand, in combination with Figure 8 , a support shaft 130 is arranged concentrically in the hollow area of the power wheel 123, one end of the support shaft 130 is fixedly provided with a Figure 7 support plate 112 as shown in the figure, the bottom of the support plate 112 is fixed with the frame 110, so that the support plate 112 provides support for the support shaft 130, and the other end of the support shaft 130 extends out of the rotating ring 126 and extends outward; on the other hand, based on Figure 8 , in combination with Figure 9 , stop teeth 140 are arranged on both sides of the support shaft 130 and engaged with the inner tooth groove, the stop teeth 140 are fixed with a movable rod 143, the movable rod 143 extends into the inside of the support shaft 130, and the stop teeth 140 realize the constraint and release of the power wheel 123 through transverse displacement (the inward retraction of the stop teeth 140 on both sides realizes the release of the power wheel 123, and the outward expansion realizes the constraint of the power wheel 123);

[0042] In addition, referring back to Figure 8 , a push piece 141 is arranged inside the rotating ring 126, the push piece 141 is arranged symmetrically, the end of each push piece 141 is fixed with a corresponding stop tooth 140, the other end extends outward to the end of the support shaft 130, and a plurality of auxiliary rods 142 are slidably arranged on the push piece 141, the auxiliary rods 142 are fixed with the support shaft 130; and a reset spring 144 is sleeved on the movable rod 143 between the push piece 141 and the support shaft 130, in the normal state, the reset spring 144 abuts against the push piece 141, so that the push piece 141 is engaged with the inner tooth groove, and in addition, the end of the support shaft 130 is fixed with the support plate 112, the support shaft 130 is limited to remain stable, at this time, referring back to Figure 5 , the compressed compression spring 125 exerts an upward pressure on the jacking column 121, and the power wheel 123 limits the upward movement of the jacking column 121, so that the locking block 122 maintains the same height, preventing the locking block 122 from contacting the friction area and causing wear;

[0043] The working principle of the stop tooth 140 is shown below, first, as shown in Figure 7 , when the operator moves the locking block 122 downward by the push rod 127, the other hand holds Figure 8Two side pushers 141 in the middle of the two side pushers 141 are retracted to press the reset spring 144, the movable rod 143 slides in the support shaft 130 until the stop teeth 140 is separated from the inner tooth groove, at this time the stop teeth 140 releases the restriction of the power wheel 123;

[0044] Then, the push rod 127 pushes the top column 121 down, the top column 121 drives the power wheel 123 to rotate counterclockwise, after the locking block 122 is completely separated from the locking groove, the stop teeth 140 is released, under the elastic action of the reset spring 144, the stop teeth 140 is pushed to match with the inner tooth groove again, so as to limit the rotation of the power wheel 123 and the upward movement of the top column 121, and relieve the hand pressure;

[0045] Then, when the top column 121 needs to be released, the restriction of the power wheel 123 is released, the power wheel 123 is in a released state, at this time, the elastic potential energy of the compression spring 125 can be used to drive the top column 121 to move upward, then, when the phenomenon that only part of the locking block 122 is located in the locking groove, at this time the inner wall of the locking groove forms a block to the locking block 122, appears, the top column 121 is further driven to move upward by rotating the power wheel 123, the correction of the locking groove is realized, so that the locking groove matches with the locking block 122, and the loosening phenomenon is prevented.

[0046] The above shows and describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above-mentioned embodiments, the above-mentioned embodiments and descriptions in the specification are only preferred examples of the present application, and are not intended to limit the present application, various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A mechanical locking device, comprising a distribution box (100), a cover plate (101), a handle (102), a rotating disk (103), and a frame (110) fixed inside the distribution box (100), characterized in that: The rotating disk (103) has two locking grooves in the circumferential direction, each locking groove corresponding to a preset locking point. A pushing mechanism (120) is arranged below the locking groove. The pushing mechanism (120) includes a top column (121), a locking block (122) and a driving part. The locking block (122) is fixed on the top of the top column (121) and is adapted to the locking groove. The bottom of the top column (121) is elastically connected to the frame (110) in the longitudinal direction. Under normal conditions, the locking block (122) is embedded in the locking groove to constrain the rotation of the rotating disk (103). The drive unit drives the locking block (122) to move up and down reciprocally according to the rotation phase of the rotating disk (103), so that the locking block (122) disengages from one of the locking slots and engages with the other locking slot. When the rotating disk (103) rotates, the top column (121) moves down and drives the locking block (122) to disengage from the locking slot, so that the rotating disk (103) and the locking block (122) will not form friction when the rotating disk (103) rotates. When the other locking slot rotates to correspond with the locking block (122), the locking block (122) moves up and abuts against the inner wall of the locking slot until the locking block (122) is completely embedded in the locking slot, so as to adjust the rotating disk (103) to the preset locking point. A slide rod (124) is fixedly installed at the bottom of the top column (121). The slide rod (124) passes through the frame (110) and is movably installed therewith. A compression spring (125) is sleeved on the slide rod (124) located between the top column (121) and the frame (110). A vertical rod is fixedly installed between the top of the locking block (122) and the top column (121). A horizontal plate (111) fixed to the frame (110) is slidably installed on the vertical rod. A lever (127) is fixed on the vertical rod. A friction zone is formed on the arc length of the rotating disk (103) between the two locking slots. The friction zone is the arc surface between the two locking slots on the rotating disk (103). When the locking block (122) is disengaged from the locking slot, the top of the locking block (122) is lower than one of the locking slots of the rotating disk (103) in the horizontal direction, so that the locking block (122) is away from the locking slot.

2. The mechanical locking device according to claim 1, characterized in that: The drive unit includes a power wheel (123), which is located on one side of the locking block (122) and has a hollowed-out center. The power wheel (123) has tooth grooves on both the circumference and the hollowed-out inner wall, and the outer tooth grooves mesh with the top column (121).

3. The mechanical locking device according to claim 2, characterized in that: A rotating ring (126) is fixedly provided on one side of the power wheel (123) to pass through the cover plate (101). The rotating ring (126) is rotatably connected to the cover plate (101) so as to drive the top column (121) to move up and down by rotation, thereby forcing the locking block (122) to disengage or engage from the locking groove.

4. The mechanical locking device according to claim 3, characterized in that: A support shaft (130) is concentrically arranged in the hollow area of ​​the power wheel (123). A support plate (112) is fixedly arranged at one end of the support shaft (130), and the other end passes through the rotating ring (126) and extends outward. The bottom of the support plate (112) is fixed to the frame (110).

5. The mechanical locking device according to claim 4, characterized in that: Both sides of the support shaft (130) are provided with stop teeth (140) that mesh with the internal tooth groove. A movable rod (143) is fixed on the stop teeth (140). The movable rod (143) extends into the support shaft (130). The stop teeth (140) achieve constraint and release of the power wheel (123) through lateral displacement.

6. The mechanical locking device according to claim 5, characterized in that: The inner side of the rotating ring (126) has symmetrically distributed paddles (141). The end of each paddle (141) is fixed to the corresponding stop tooth (140), and the other end extends outward to be close to the end of the support shaft (130). Several auxiliary rods (142) are slidably arranged on the paddles (141), and the auxiliary rods (142) are fixed to the support shaft (130).

7. The mechanical locking device according to claim 6, characterized in that: A return spring (144) is sleeved on the movable rod (143) located between the paddle (141) and the support shaft (130). Under normal conditions, the return spring (144) abuts against the paddle (141) so that the paddle (141) meshes with the inner tooth groove.

8. A comprehensive distribution box, characterized in that: The mechanical locking device described in any one of claims 1-7 is adopted.

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