Driving device of high-voltage circuit breaker

Abstract

The invention discloses a driving device of a high-voltage circuit breaker, and relates to the technical field of high-voltage circuit breakers. The circuit breaker comprises a circuit breaker assembly, the circuit breaker assembly comprises a hollow outer shell, a first transmission gear, a second transmission gear and a driving gear are rotationally arranged in the hollow outer shell, one side face of the first transmission gear is fixedly connected with a manual operation interface, and a first driving motor is fixedly installed in the hollow outer shell; a transmission assembly is slidably arranged on the lower surface of the circuit breaker assembly, the transmission assembly comprises a U-shaped transmission frame body, one side of the transmission assembly is clamped and matched with a mounting frame body, and clamping assemblies are fixedly connected to the two opposite side surfaces of the transmission assembly and the two opposite side surfaces of the mounting frame body. According to the invention, the first driving motor drives the second transmission gear to rotate so as to drive the driving gear to rotate, and meanwhile, the manual operation structure can be manually rotated to drive the driving gear to rotate, so that the circuit breaker can be driven in various modes to carry out energy storage operation, and the influence of external factors on equipment use is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of high - voltage circuit breakers, and particularly relates to a driving device for a high - voltage circuit breaker. Background Art

[0002] A high - voltage circuit breaker is a key device used in power systems for voltage levels of 3 kV and above. Under normal operation, it can connect or disconnect the no - load current and load current in a high - voltage circuit. When a fault occurs, in cooperation with a relay protection device, it can cut off the current within milliseconds in case of short - circuit, overload and other faults to prevent the expansion of the accident. When closing, the operating mechanism drives the contact to close and conduct the current. When opening, the arc is extinguished by the separation of the opening contact, the cooling of the arc - extinguishing medium and the stretching of the arc to cut off the current.

[0003] When a common circuit breaker is in use, through energy storage and closing operations, and when a fault occurs, an opening operation is carried out in a timely manner. However, in the actual use process, a single energy - storage driving method is easily affected by external factors. When a power failure occurs and the driving device cannot work properly, it affects the energy - storage transmission of the circuit breaker. For this reason, we provide a driving device for a high - voltage circuit breaker to solve the above - mentioned technical problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a driving device for a high - voltage circuit breaker, which solves the problems in the above - mentioned technical background through the specific structural design of a circuit - breaker component, a transmission component and a clamping component.

[0005] To solve the above - mentioned technical problems, the present invention is realized through the following technical solutions: The present invention is a driving device for a high - voltage circuit breaker, including a circuit - breaker component. The circuit - breaker component includes a hollow outer shell. Inside the hollow outer shell, a first transmission gear and a second transmission gear are rotatably arranged. The first transmission gear and the second transmission gear are meshed with each other. A driving gear is rotatably arranged inside the hollow outer shell, and the first transmission gear is meshed with the driving gear. A manual operation interface is fixedly connected to one side surface of the first transmission gear. A first driving motor is fixedly installed inside the hollow outer shell, and the output shaft of the first driving motor is fixedly connected to the second transmission gear. A set of operating rods is fixedly connected to the other side surface of the first transmission gear. A set of energy - storage rods is fixedly connected to the side surface of the driving gear close to the set of operating rods. A transmission component is slidably arranged on the lower surface of the circuit - breaker component. The transmission component includes a horizontally movable U - shaped transmission frame. One side of the transmission component is clamped and matched with a mounting frame. Clamping components are fixedly connected to the opposite side surfaces of the transmission component and the opposite side surfaces of the mounting frame, and adjacent two clamping components are clamped and matched with each other.

[0006] The present invention is further configured such that a closing connection post is fixedly connected to one side surface of the hollow outer housing. A plurality of partition baffles are fixedly connected inside the hollow outer housing. The first transmission gear and the second transmission gear are rotatably connected to one of the partition baffles. The energy storage rod group includes an energy storage large shaft fixedly connected to the driving gear. One end of the energy storage large shaft penetrating through another partition baffle is fixedly connected with an energy storage crank arm. A first extension plate is rotatably connected to one side surface of the energy storage crank arm. A second extension plate is rotatably connected to the top inside the hollow outer housing through an ear plate. An energy storage spring is arranged between the first extension plate and the second extension plate.

[0007] The present invention is further configured such that the first driving motor is fixedly connected to the partition baffle close to the second transmission gear. An energy storage indicating plate and a micro-motion indicating plate are respectively fixedly connected to the circumferential surface of the energy storage large shaft. A micro-switch is fixedly installed on one side surface of the partition baffle close to the micro-motion indicating plate. A transmission connecting rod is rotatably connected to one side surface of the partition baffle close to the energy storage indicating plate. The transmission connecting rod is adapted to the energy storage indicating plate. One end of the transmission connecting rod is fixedly connected with a closing indicating plate.

[0008] The present invention is further configured such that the energy storage rod group includes a rotating shaft fixedly connected to the first transmission gear. One end of the rotating shaft penetrating through the partition baffle is rotatably connected with a driving ratchet. A transmission inner ratchet is rotatably connected to the circumferential surface of the rotating shaft. The transmission inner ratchet is adapted to the driving ratchet. An extension connecting rod is fixedly connected to the circumferential surface of the transmission inner ratchet. A closing connecting rod is rotatably connected to one side surface of the extension connecting rod. A closing driving plate is rotatably connected to the bottom inside the hollow outer housing. The closing driving plate is rotatably connected to the closing connecting rod; a transmission disc is fixedly connected to one side surface of the partition baffle close to the first driving motor. A closing roller is fixedly connected to an eccentric position of the transmission disc. A closing pawl is rotatably connected to one side surface of the partition baffle close to the transmission disc. The closing pawl is adapted to the closing roller.

[0009] The present invention is further configured such that the transmission assembly includes a docking support plate slidably fitted with the hollow outer housing. A guiding chute is formed on the upper surface of the docking support plate. The guiding chute is slidably fitted with a U-shaped transmission frame body. A driving screw is rotatably connected inside the guiding chute. The driving screw is in threaded cooperation with the U-shaped transmission frame body. Two docking support columns are symmetrically and fixedly connected to one side surface of the docking support plate. A docking hole adapted to the docking support columns is formed on one side surface of the installation frame body.

[0010] The present invention is further configured such that the engaging assembly includes a hollow engaging frame fixedly connected to the docking support plate and the installation frame body. A engaging driving block is slidably arranged inside the hollow engaging frame. The engaging driving block is adapted to the adjacent hollow engaging frame. A engaging connecting rod is fixedly connected to the circumferential surface of the engaging driving block.

[0011] The present invention has the following beneficial effects: 1. By providing a circuit breaker assembly, the first driving motor is used to drive the second transmission gear to rotate. Under the meshing action of the second transmission gear and the first transmission gear, the first transmission gear rotates, thereby driving the driving gear to rotate. Alternatively, the second transmission gear can be rotated by manually rotating the manual operation interface, and the driving gear rotates synchronously to perform the energy storage operation. In this way, multiple ways are realized to drive the energy storage operation, avoiding the inability to use in the case of power failure.

[0012] 2. By providing a transmission assembly and a clamping assembly, the docking support column is moved along the corresponding docking hole, and the clamping link is rotated to drive the clamping drive block to rotate synchronously until the clamping drive block enters the adjacent hollow clamping frame. Then, the driving screw is rotated to drive the U-shaped transmission frame to move synchronously until the circuit breaker assembly moves into the installation frame for installation. In this way, it is convenient for the circuit breaker assembly to enter a narrow area and is convenient for installation and fixation. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 Structural schematic diagram of the driving device for a high-voltage circuit breaker.

[0015] Figure 2 Structural schematic diagram of the circuit breaker assembly in the present invention.

[0016] Figure 3 Longitudinal structural sectional view of the circuit breaker assembly in the present invention.

[0017] Figure 4 For Figure 3 Another perspective structural schematic diagram.

[0018] Figure 5 For Figure 4 Partial enlarged schematic diagram at position A in

[0019] Figure 6 Partial structural schematic diagram of the transmission assembly in the present invention.

[0020] Figure 7 Another partial structural schematic diagram of the transmission assembly in the present invention.

[0021] Figure 8 Structural schematic diagram of the clamping assembly in the present invention.

[0022] Figure 9 This is a longitudinal structural schematic diagram of the clamping component in the present invention.

[0023] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0024] 1 - Circuit breaker assembly, 101 - Hollow outer housing, 102 - First transmission gear, 103 - Second transmission gear, 104 - Driving gear, 105 - Manual operation interface, 106 - Closing docking post, 107 - Energy storage large shaft, 108 - Energy storage crank arm, 109 - Energy storage spring, 110 - Energy storage indicator board, 111 - Micro motion indicator board, 112 - Micro switch, 113 - Transmission connecting rod, 114 - Closing indicator board, 115 - Driving pawl, 116 - Transmission internal ratchet wheel, 117 - Closing connecting rod, 118 - Closing driving plate, 119 - Transmission disc, 120 - Closing pawl, 2 - Transmission component, 201 - U-shaped transmission frame body, 202 - Installation frame body, 203 - Docking support plate, 204 - Guide chute, 205 - Driving screw rod, 206 - Docking support post, 207 - Docking hole, 3 - Clamping component, 301 - Hollow clamping frame, 302 - Clamping driving block, 303 - Clamping connecting rod. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] For specific embodiment 1, please refer to Figures 1-9 , the present invention is a driving device for a high-voltage circuit breaker, including a circuit breaker assembly 1. Specifically, the circuit breaker assembly 1 includes a hollow outer housing 101. Inside the hollow outer housing 101, a first transmission gear 102 and a second transmission gear 103 are rotatably arranged. The first transmission gear 102 and the second transmission gear 103 are meshed with each other. Inside the hollow outer housing 101, a driving gear 104 is rotatably arranged, and the first transmission gear 102 and the driving gear 104 are meshed with each other. One side surface of the first transmission gear 102 is fixedly connected with a manual operation interface 105. A first driving motor is fixedly installed inside the hollow outer housing 101, and the output shaft of the first driving motor is fixedly connected with the second transmission gear 103. The other side surface of the first transmission gear 102 is fixedly connected with an operating rod group, and one side surface of the driving gear 104 close to the operating rod group is fixedly connected with an energy storage rod group. The operating rod group is used to control the opening and closing operations, and the energy storage rod group is used for the stretching and releasing operations of the energy storage operation.

[0027] Further, a transmission assembly 2 is slidably disposed on the lower surface of the circuit breaker assembly 1. The transmission assembly includes a U-shaped transmission frame body 201 that can move horizontally. One side of the transmission assembly 2 is snap-fitted with a mounting frame body 202. Snap-fitting components 3 are fixedly connected to opposite sides of the transmission assembly 2 and opposite sides of the mounting frame body 202, respectively, and adjacent two snap-fitting components 3 are snap-fitted with each other.

[0028] The operation process of this embodiment is as follows: Place the circuit breaker assembly 1 on the upper surface of the transmission assembly 2. Due to the snap-fitting between the two snap-fitting components 3, by controlling the horizontal movement of the U-shaped transmission frame body 201, the circuit breaker assembly 1 is driven to move synchronously until the circuit breaker assembly 1 is installed inside the mounting frame body 202. Before the circuit breaker assembly 1 is used, the first drive motor can be driven to drive the second transmission gear 103 to rotate. Under the meshing action of the second transmission gear 103 and the first transmission gear 102, the first transmission gear 102 rotates synchronously. At the same time, under the meshing action of the first transmission gear 102 and the drive gear 104, the drive gear 104 rotates synchronously, driving the energy storage rod group to perform energy storage operation; or manually rotate the manual operation interface 105 to drive the first transmission gear 102 to rotate, and then drive the drive gear 104 to rotate, and the energy storage rod group performs energy storage operation. When a fault such as a short circuit occurs in the circuit, the energy storage rod group is actuated to release energy, and under the action of the operating rod group, a tripping operation is performed to achieve the circuit breaking operation.

[0029] Specific embodiment two, please refer to Figures 1-9 , on the basis of specific embodiment one, specifically, a closing docking column 106 is fixedly connected to one side surface of the hollow outer shell 101. A plurality of partition baffles are fixedly connected inside the hollow outer shell 101. The partition baffles divide the interior of the hollow outer shell 101 into several chambers. The first transmission gear 102 and the second transmission gear 103 are rotatably connected to one of the partition baffles. The energy storage rod group includes an energy storage large shaft 107 fixedly connected to the drive gear 104. One end of the energy storage large shaft 107 passing through another partition baffle is fixedly connected with an energy storage crank arm 108. A first extension plate is rotatably connected to one side surface of the energy storage crank arm 108. The top inner part of the hollow outer shell 101 is rotatably connected with a second extension plate through an ear plate. An energy storage spring 109 is disposed between the first extension plate and the second extension plate.

[0030] Further, the first drive motor is fixedly connected to the partition baffle close to the second transmission gear. Energy storage indicating plates 110 and micro-motion indicating plates 111 are respectively fixedly connected to the circumferential side surface of the energy storage large shaft 107. A micro-switch 112 is fixedly installed on one side surface of the partition baffle close to the micro-motion indicating plate 111. A transmission connecting rod 113 is rotatably connected to one side surface of the partition baffle close to the energy storage indicating plate 110. The transmission connecting rod 113 is adapted to the energy storage indicating plate 110. One end of the transmission connecting rod 113 is fixedly connected with a closing indicating plate 114.

[0031] Further, the energy storage rod group includes a rotating shaft fixedly connected to the first transmission gear 102. One end of the rotating shaft passing through the partition baffle is rotatably connected to a driving ratchet 115. The driving ratchet 115 is connected to the rotating shaft through an elastic element. A transmission internal ratchet 116 is rotatably connected to the circumferential side of the rotating shaft. The transmission internal ratchet 116 is adapted to the driving ratchet 115. An extension connecting rod is fixedly connected to the circumferential side of the transmission internal ratchet 116. A closing connecting rod 117 is rotatably connected to one side surface of the extension connecting rod. A closing driving plate 118 is rotatably connected to the inner bottom of the hollow outer housing 101. The closing driving plate 118 is rotatably connected to the closing connecting rod 117. A transmission disc 119 is fixedly connected to one side surface of the partition baffle near the first driving motor. A closing roller is fixedly connected to an eccentric position of the transmission disc 119. A closing pawl 120 is rotatably connected to one side surface of the partition baffle near the transmission disc 119. The closing pawl 120 is adapted to the closing roller.

[0032] Further, the transmission assembly 2 includes a docking support plate 203 slidably fitted with the hollow outer housing 101. A guiding chute 204 is formed on the upper surface of the docking support plate 203. The guiding chute 204 is slidably fitted with the U-shaped transmission frame 201. A driving screw 205 is rotatably connected inside the guiding chute 204. The driving screw 205 is in threaded cooperation with the U-shaped transmission frame 201. Two docking support columns 206 are symmetrically and fixedly connected to one side surface of the docking support plate 203. A second driving motor is fixedly installed on the side surface of the docking support plate 203 away from the docking support columns 206. The output shaft of the second driving motor is fixedly connected to the driving screw 205. A docking hole 207 adapted to the docking support columns 206 is formed on one side surface of the installation frame 202.

[0033] Further, the engaging assembly 3 includes a hollow engaging frame 301 fixedly connected to the docking support plate 203 and the installation frame 202. An engaging driving block 302 is slidably arranged inside the hollow engaging frame 301. The engaging driving block 302 is adapted to the adjacent hollow engaging frame 301. An engaging connecting rod 303 is fixedly connected to the circumferential side of the engaging driving block 302.

[0034] The operation process of this embodiment is as follows: Place the circuit breaker assembly 1 on the upper surface of the transmission assembly 2. Control the docking support column 206 to move along the corresponding docking hole 207 towards the installation frame body 202 until the docking support plate 203 fits with the installation frame body 202. Manually rotate the engaging link 303 to drive the engaging drive block 302 to rotate synchronously until a part of the engaging drive block 302 rotates into the adjacent hollow engaging frame 301, thereby realizing the connection between the two engaging assemblies 3. Start the second drive motor to drive the drive screw 205 to rotate. Under the screw-thread matching effect of the drive screw 205 and the U-shaped transmission frame body 201, the U-shaped transmission frame body 201 slides horizontally along the inside of the guiding chute 204. Drive the circuit breaker assembly 1 to move synchronously through the horizontal movement of the U-shaped transmission frame body 201. Under the clamping and matching effect between the closing docking column 106 and the inside of the installation frame body 202 (an adapter plug adapted to the closing docking column 106 is installed inside the installation frame body 202. Through the plugging action between the closing docking column 106 and the corresponding adapter plug, the circuit breaker assembly 1 is connected to the circuit), the circuit breaker assembly 1 is installed inside the installation frame body 202.

[0035] Before using the circuit breaker assembly 1, the second transmission gear 103 can be driven to rotate by the first drive motor. Under the meshing effect of the second transmission gear 103 and the first transmission gear 102, the first transmission gear 102 rotates synchronously. At the same time, under the meshing effect of the first transmission gear 102 and the drive gear 104, the drive gear 104 rotates synchronously; or manually rotate the manual operation interface 105 to drive the first transmission gear 102 to rotate, and then drive the drive gear 104 to rotate. The energy storage rod group performs energy storage operation. During the rotation of the drive gear 104, the energy storage large shaft 107 rotates synchronously, and the energy storage crank arm 108 rotates synchronously. Under the connection effect of the first extension plate, the energy storage spring 109 is stretched for energy storage operation. At the same time, during the rotation of the energy storage large shaft 107, the energy storage indicator board 110 and the micro-motion indicator board 111 rotate synchronously. Under the cooperation effect of the energy storage indicator board 110 and the transmission connecting rod 113, the transmission connecting rod 113 drives the closing indicator board 114 to rotate synchronously for closing display. At the same time, the micro-motion indicator board 111 presses down the micro-switch 112 to start the micro-switch 112. At the same time, the transmission disc 119 rotates to drive the closing roller to move. The closing roller moves to drive the closing pawl 120 to rotate. During the rotation of the first transmission gear 102, under the cooperation effect of the transmission internal ratchet 116 and the drive pawl 115, the transmission internal ratchet 116 rotates synchronously with the rotating shaft. Under the connection effect of the closing connecting rod 117, the closing drive plate 118 rotates. During the rotation of the closing drive plate 118, a closing operation is performed. When a fault such as a short circuit occurs in the circuit, the energy storage rod group is affected to release energy. Under the action of the operating rod group, the closing drive plate 118 rotates in the reverse direction for a tripping operation to realize the opening operation of the circuit.

[0036] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0037] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A driving device for a high voltage circuit breaker, comprising a circuit breaker assembly (1), characterized in that: The circuit breaker assembly (1) comprises a hollow outer shell (101), a first transmission gear (102) and a second transmission gear (103) are rotatably arranged inside the hollow outer shell (101), the first transmission gear (102) and the second transmission gear (103) are meshed with each other, a driving gear (104) is rotatably arranged inside the hollow outer shell (101), and the first transmission gear (102) and the driving gear (104) are meshed with each other, a manual operation interface (105) is fixedly connected to one side of the first transmission gear (102), a first driving motor is fixedly installed inside the hollow outer shell (101), and the output shaft of the first driving motor is fixedly connected to the second transmission gear (103); The other side of the first transmission gear (102) is fixedly connected to an operating rod group, and the side of the driving gear (104) close to the operating rod group is fixedly connected to an energy storage rod group; A transmission assembly (2) is slidably arranged on the lower surface of the circuit breaker assembly (1), the transmission assembly comprising a U-shaped transmission frame (201) that can move horizontally, a mounting frame (202) being snap-fitted on one side of the transmission assembly (2), two opposite side surfaces of the transmission assembly (2) and two opposite side surfaces of the mounting frame (202) being fixedly connected with snap-fit ​​assemblies (3), and two adjacent snap-fit ​​assemblies (3) being snap-fitted with each other.

2. The driving device of the high-voltage circuit breaker according to claim 1, characterized in that, A closing docking column (106) is fixedly connected to one side of the hollow outer shell (101); a plurality of partition baffles are fixedly connected inside the hollow outer shell (101); the first transmission gear (102) and the second transmission gear (103) are rotatably connected to one of the partition baffles; the energy storage rod group comprises an energy storage shaft (107) fixedly connected to the driving gear (104); one end of the energy storage shaft (107) passing through another partition baffle is fixedly connected to an energy storage crank arm (108); a side of the energy storage crank arm (108) is rotatably connected to a first extension plate; the top of the hollow outer shell (101) is rotatably connected to a second extension plate via an ear plate; an energy storage spring (109) is provided between the first extension plate and the second extension plate.

3. The driving device of the high-voltage circuit breaker according to claim 2, characterized in that, The first drive motor is fixedly connected to a partition baffle plate close to the second transmission gear; an energy storage indicator plate (110) and a micro-motion indicator plate (111) are respectively fixedly connected to the circumferential side surfaces of the energy storage shaft (107); a micro-switch (112) is fixedly installed on one side surface of the partition baffle plate close to the micro-motion indicator plate (111); a transmission connecting rod (113) is rotatably connected to one side surface of the partition baffle plate close to the energy storage indicator plate (110); the transmission connecting rod (113) is adapted to the energy storage indicator plate (110); and one end of the transmission connecting rod (113) is fixedly connected to a closing indicator plate (114).

4. The driving device of the high-voltage circuit breaker according to claim 3, characterized in that, The energy storage rod group includes a rotating shaft fixedly connected to the first transmission gear (102). One end of the rotating shaft penetrates through the partition baffle and is rotatably connected to a driving pawl (115). A transmission internal ratchet wheel (116) is rotatably connected to the circumferential side of the rotating shaft. The transmission internal ratchet wheel (116) is adapted to the driving pawl (115). An extension connecting rod is fixedly connected to the circumferential side of the transmission internal ratchet wheel (116). A closing connecting rod (117) is rotatably connected to one side surface of the extension connecting rod. A closing driving plate (118) is rotatably connected to the inner bottom of the hollow outer casing (101). The closing driving plate (118) is rotatably connected to the closing connecting rod (117).

5. The driving device of the high-voltage circuit breaker according to claim 4, characterized in that A transmission disc (119) is fixedly connected to one side surface of the partition baffle close to the first driving motor. A closing roller is fixedly connected to an eccentric position of the transmission disc (119). A closing pawl (120) is rotatably connected to one side surface of the partition baffle close to the transmission disc (119). The closing pawl (120) is adapted to the closing roller.

6. The driving device of the high-voltage circuit breaker according to claim 5, characterized in that, The transmission component (2) includes a docking support plate (203) slidably fitted with the hollow outer casing (101). A guiding chute (204) is formed on the upper surface of the docking support plate (203). The guiding chute (204) is slidably fitted with a U-shaped transmission frame body (201). A driving screw rod (205) is rotatably connected inside the guiding chute (204). The driving screw rod (205) is in threaded fit with the U-shaped transmission frame body (201). Two docking support columns (206) are symmetrically and fixedly connected to one side surface of the docking support plate (203). A docking hole (207) adapted to the docking support columns (206) is formed on one side surface of the installation frame body (202).

7. The driving device of the high-voltage circuit breaker according to claim 6, characterized in that, The engaging component (3) includes a hollow engaging frame (301) fixedly connected to the docking support plate (203) and the installation frame body (202). An engaging driving block (302) is slidably arranged inside the hollow engaging frame (301). The engaging driving block (302) is adapted to the adjacent hollow engaging frame (301). An engaging connecting rod (303) is fixedly connected to the circumferential side of the engaging driving block (302).

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