An automated assembly tightening device for circuit breakers

Abstract

The application relates to the technical field of automatic assembly of circuit breakers, in particular to an automatic assembly and tightening device for circuit breakers, which comprises a lifting assembly, a rotating assembly and a locking assembly, the lifting assembly comprises a lifting seat and a lifting power source for driving the lifting seat to perform lifting movement, the rotating assembly comprises a rotating driving mechanism and a rotating piece, the rotating piece is connected with the driving end of the rotating driving mechanism, the rotating driving mechanism is fixed on the lifting seat, the output end of the rotating driving mechanism is connected with the rotating piece through a floating shaft, and the rotating piece cooperates with a pressure cylinder; the locking assembly is arranged on the rotating piece and comprises a locking driving mechanism and a locking piece; the locking driving mechanism drives the locking piece to be inserted into or withdrawn from the pin hole of the pressure cylinder. The automatic tightening device is used for assembling the cylindrical parts of the circuit breaker, the process hole in the circumferential direction is used as the counterforce point for fixing the locking piece, and meanwhile, the automatic tightening of two parts is realized by rotating and driving one side part.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic assembly of circuit breakers, in particular to an automatic assembly and tightening device for circuit breakers. BACKGROUND

[0002] In the assembly production process of the circuit breaker, the static contact in the circuit breaker needs to be threadedly fastened with the static side support conductor, and the compression cylinder in the circuit breaker needs to be threadedly fastened with the dynamic side support conductor. Process holes are arranged on the static contact and the compression cylinder, and in the assembly process, the clamping shaft on the tightening tool is clamped into the process hole, and the operator rotates the static contact (compression cylinder) by holding the tightening tool to tighten the corresponding threads on the static side support conductor (dynamic side support conductor). In the related art, the tightening operation is generally performed manually, which cannot realize automatic assembly at the assembly operation station on the automatic assembly line of the circuit breaker, thereby affecting the assembly efficiency of the overall automatic assembly line.

[0003] The current manual tightening scheme for the circuit breaker uses a tightening tool, the worker installs the tightening tool on the part to be tightened, and then connects a hand-held torque wrench with the tightening tool to tighten, which has the following disadvantages:

[0004] 1) The worker is prone to bumping the surface of the part when installing the tightening tool, which may cause discharge during testing.

[0005] 2) The required tightening torque is large, the worker needs to first fix the non-rotating part on the workbench that can withstand the reaction force, then tighten, and then disassemble after tightening, which is slow in pace.

[0006] 3) The required tightening torque is large, and manual tightening is prone to unqualified tightening torque. SUMMARY

[0007] In view of the low tightening efficiency and poor quality of the tightening tool in the prior art, the present application provides an automatic assembly and tightening device for circuit breakers.

[0008] The present application is realized by the following technical solutions:

[0009] An automatic assembly and tightening device for circuit breakers, comprising a lifting assembly, a rotating assembly and a locking assembly, the lifting assembly comprising a lifting seat and a lifting power source driving the lifting seat to move up and down, the rotating assembly comprising a rotating drive mechanism and a rotating part, the rotating part being connected with the driving end of the rotating drive mechanism, the rotating drive mechanism being fixed on the lifting seat, the output end of the rotating drive mechanism being connected with the rotating part through a floating shaft, and the rotating part cooperating with the compression cylinder; the locking assembly is arranged on the rotating part, and the locking assembly comprises a locking drive mechanism and a locking part, the locking drive mechanism driving the locking part to insert into or exit from the pin hole of the compression cylinder.

[0010] Preferably, the lifting seat comprises an upper support plate, a lower support plate and an elastic piece, the upper surface of the upper support plate is connected with the driving end of the lifting power source; the upper support plate and the lower support plate are arranged in parallel at intervals, the elastic piece is arranged in a compressed state between the upper support plate and the lower support plate, the upper end of the elastic piece abuts against the lower surface of the upper support plate, and the lower end abuts against the upper surface of the lower support plate.

[0011] Preferably, the upper surface of the lower support plate is provided with a limiting column, and the length of the limiting column is less than the length of the elastic piece in the unused state.

[0012] Preferably, the lifting seat further comprises a limiting mechanism, the limiting mechanism comprises a limiting rod and a limiting sleeve, one end of the limiting rod is connected with the lower surface of the upper support plate, the other end of the limiting rod penetrates through the lower support plate and is matched with the limiting sleeve, and the elastic piece is sleeved on the limiting rod.

[0013] Preferably, the shell of the rotary driving mechanism is fixed to the upper surface of the upper support plate, the driving end of the rotary driving mechanism is fixedly connected with a floating shaft, the floating shaft penetrates through the upper support plate, the lower support plate and the top of the rotary piece and is connected with the rotary piece, and the rotary piece has a hollow structure, and the air cylinder is placed in the hollow accommodating groove of the rotary piece in use.

[0014] Preferably, the floating shaft comprises an upper shaft body and a lower shaft body, the upper shaft body is fixedly connected with the output end of the rotary driving mechanism and penetrates through the upper support plate, one end of the lower shaft body is connected with the upper shaft body and penetrates through the lower support plate, and the other end is fixedly connected with the rotary piece.

[0015] Preferably, the upper shaft body and the rotary driving mechanism are connected through a spline pin, and the upper shaft body and the lower shaft body are connected through a spline.

[0016] Preferably, the locking driving mechanism is an air pump, the locking piece is a pin shaft, the shell of the air pump is fixedly connected with the outer wall of the rotary piece, the output end of the air pump is connected with the pin shaft, a through hole is formed in the locking piece, and when the locking piece is locked, the pin shaft penetrates through the rotary piece and is connected with the pin hole of the air cylinder through the through hole.

[0017] Preferably, the rotary piece is further provided with a detection sensor, the detection sensor is linked with the rotary driving mechanism, the probe of the detection sensor faces the central axis of the rotary piece, and the length axis of the detection sensor is parallel to the length axis of the locking piece.

[0018] Preferably, the lifting seat further comprises a controller, the output end of the detection sensor is connected with the input end of the controller, and the driving end of the lifting power source, the rotary driving mechanism and the locking driving mechanism is connected with the output end of the controller.

[0019] Compared with the prior art, the lifting seat has the following beneficial effects:

[0020] The application discloses an automatic assembly and tightening device for a circuit breaker, which is characterized in that the locking assembly is used to fix the parts to be tightened by the process holes of the parts themselves, and then the rotating assembly is used to automatically tighten the two parts which have been selected and assembled.

[0021] The locking assembly can be lifted, rotated or lifted and rotated simultaneously by the lifting assembly and the rotating assembly. The locking assembly is aligned with the force receiving structure by locking, and the locking driving mechanism drives the locking piece to move after the locking piece is aligned with the force receiving structure, so that the locking piece is locked with the force receiving structure. Then the static contact (air cylinder) can be lifted and rotated by the rotating piece, and then the static contact (air cylinder) can be screwed to the static side support conductor (dynamic side support conductor). The automatic assembly and tightening of the static contact (air cylinder) and the static side support conductor (dynamic side support conductor) are realized. Experimental tests show that the automatic assembly and tightening by the tightening device is more efficient than manual operation, and the production efficiency is improved.

[0022] Further, the lifting seat comprises a support plate, a limiting mechanism and an elastic piece, which provides stable support and accurate limiting in combination with the limiting rod.

[0023] Further, the floating shaft comprises an upper shaft body and a lower shaft body, which are connected by splines to allow relative sliding in the axial direction, thereby improving the adaptability and flexibility of the device.

[0024] Further, the detection sensor is used to detect the position information of the force receiving structure, thereby improving the accuracy of alignment.

[0025] Further, the force receiving structure is a pin hole, and the locking piece is a pin shaft, which can move under the driving of the locking driving mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the overall structure schematic diagram of the automatic assembly and tightening device for the circuit breaker;

[0027] Figure 2 is the sectional view of the automatic assembly and tightening device for the circuit breaker;

[0028] Figure 3 isFigure 2 Enlarged view of part A in the figure;

[0029] Figure 4 is a side view of an automatic assembly tightening device for circuit breaker of the application;

[0030] Figure 5 is a structure diagram of the automatic assembly tightening device for circuit breaker of the application locked and pressed down by the locking member and the air cylinder;

[0031] Figure 6 is a side view of the automatic assembly tightening device for circuit breaker of the application in use;

[0032] Figure 7 is a sectional view of the automatic assembly tightening device for circuit breaker of the application in use;

[0033] Figure 8 is Figure 7 Enlarged view of part B in the figure;

[0034] Figure 9 is an exploded view of the rotating drive mechanism and the floating shaft in the automatic assembly tightening device for circuit breaker of the application;

[0035] Figure 10 is a structure diagram of the locking drive mechanism and the pneumatic slip ring in the automatic assembly tightening device for circuit breaker of the application.

[0036] In the figure, 1, lifting seat; 10, upper support plate; 11, lower support plate; 110, connecting column; 12, limiting mechanism; 120, limiting plate; 121, guide column; 122, limiting block; 13, elastic member; 14, limiting column; 15, mounting plate; 2, rotating drive mechanism; 20, drive shaft; 21, floating shaft; 210, upper shaft body; 211, lower shaft body; 3, rotating member; 30, containing groove; 31, opening; 4, locking drive mechanism; 40, air inlet and outlet hole; 41, mounting seat; 5, locking member; 6, detection sensor; 7, pneumatic slip ring; 70, fixed section; 700, fixed end air pipe; 71, rotating section; 710, rotating end air pipe; 72, pressure reducing valve mechanism; 73, valve port; 8, air cylinder; 80, pin hole. DETAILED DESCRIPTION

[0037] The application will be further described in detail below with specific examples, which are an explanation of the application rather than a limitation.

[0038] The application discloses an automatic assembly tightening device for circuit breaker, referring to Figure 1 , 2, 3, comprising a lifting assembly, a rotating assembly, a locking assembly and a controller, the lifting assembly comprises a lifting seat 1 and a lifting power source driving the lifting seat 1 to move up and down, which can be a pneumatic cylinder, a hydraulic cylinder or the like, the lifting seat 1 comprises an upper support plate 10, a lower support plate 11, an elastic member 13, a limiting column 14 and a limiting mechanism 12, the upper surface of the upper support plate 10 is connected with the driving end of the lifting power source; the upper support plate 10 and the lower support plate 11 are arranged in parallel at intervals, the elastic member 13 is arranged in a compressed state between the upper support plate 10 and the lower support plate 11, the upper end of the elastic member 13 abuts against the lower surface of the upper support plate 10, and the lower end abuts against the upper surface of the lower support plate 11, the upper surface of the lower support plate 11 is provided with the limiting column 14, and the length of the limiting column 14 is less than the length of the elastic member 13 in the unused state. The limiting mechanism 12 comprises a limiting rod and a limiting sleeve, one end of the limiting rod is connected with the lower surface of the upper support plate 10, and the other end penetrates through the lower support plate 11 and is matched with the limiting sleeve; the elastic member 13 is sleeved on the limiting rod, and in this embodiment, the elastic member 13 adopts a compression spring.

[0039] With reference to Figure 4 、 6 , the elastic member 13 causes the upper support plate 10 and the lower support plate 11 to have a tendency to move away from each other and press them, and the limiting mechanism 12 is used to limit the distance between the upper support plate 10 and the lower support plate 11 to be not greater than a preset distance H, under the action of the elastic member 13, the upper support plate 10 and the lower support plate 11 have a tendency to move away from each other, but under the action of the limiting mechanism 12, the upper support plate 10 and the lower support plate 11 cannot continue to move away from each other after moving away from each other to the preset distance H.

[0040] The rotating assembly comprises a rotating driving mechanism 2 and a rotating member 3, the rotating member 3 is connected with the driving end of the rotating driving mechanism 2, the rotating driving mechanism 2 is fixed on the lifting seat 1, the output end of the rotating driving mechanism 2 is connected with the rotating member 3 through a floating shaft 21, and the rotating member 3 cooperates with the pressure cylinder 8. The shell of the rotating driving mechanism 2 is fixed on the upper surface of the upper support plate 10, the driving end of the rotating driving mechanism 2 is fixedly connected with the floating shaft 21, the floating shaft 21 penetrates through the upper support plate 10, the lower support plate 11 and the top of the rotating member 3 and is connected with the top of the rotating member 3; the rotating member 3 has a hollow structure, and in use, the pressure cylinder 8 is placed in the hollow accommodating groove 30 of the rotating member 3. In the application of the tightening device, the rotating member 3 can be sleeved outside the static contact (pressure cylinder 8) through the accommodating groove 30. The rotating member 3 is designed as a hollow shell structure, and the outer surface thereof is also large enough to facilitate the locking assembly to be mounted on the rotating member 3. The rotating member 3 can also be designed as a bracket structure, as long as it can ensure that the locking member 5 arranged on the rotating member 3 can be aligned and locked with the stress structure on the static contact (pressure cylinder 8).

[0041] Wherein, since the upper support plate 10 and the lower support plate 11 are designed to be relatively movable, the rotary driving mechanism 2 arranged on the upper support plate 10 will be lowered relative to the rotating piece 3, and the transmission connection structure between the two can not only realize axial torque transmission, but also meet the need that the two can be relatively moved along the vertical direction. Thus, referring to Figure 5 、 9 , the output shaft of the rotary driving mechanism 2 is connected with the rotating piece 3 through a floating shaft 21, the floating shaft 21 comprises an upper shaft body 210 and a lower shaft body 211, the upper shaft body 210 is fixedly connected with the output shaft of the rotary driving mechanism 2, the lower shaft body 211 is fixedly connected with the rotating piece 3, and the upper shaft body 210 and the lower shaft body 211 are spline-connected to enable the two to relatively slide along the axial direction. The upper shaft body 210 and the output shaft of the rotary driving mechanism 2 are spline-connected to realize circumferential limiting, and a pin is used to penetrate the two to realize axial limiting. The upper end of the lower shaft body 211 is spline-connected with the lower end of the upper shaft body 210, and the lower end of the lower shaft body 211 is fixedly connected with the rotating piece 3.

[0042] Referring to Figure 1 、 3 , the locking assembly is arranged on the rotating piece 3, the locking assembly is arranged on the rotating piece 3 and can act with the rotating piece 3, the locking piece 5 can be aligned with the force receiving structure in the process of acting with the rotating piece 3, and the locking driving mechanism 4 can drive the locking piece 5 to act to be locked with the force receiving structure after the locking piece 5 is aligned with the force receiving structure, so that the rotating piece 3 can drive the static contact (the air cylinder 8) to act. The locking assembly comprises the locking driving mechanism 4 and the locking piece 5, the locking driving mechanism 4 drives the locking piece 5 to insert into or exit from the pin hole 80 of the air cylinder 8, and the locking piece 5 acts with the rotating piece 3 to ascend and rotate when the rotating piece 3 ascends and rotates. The locking driving mechanism 4 is a gas pump, the locking piece 5 is a pin shaft, the housing of the gas pump is fixedly connected with the outer wall of the rotating piece 3, the output end of the gas pump is connected with the pin shaft, the locking piece 5 is provided with a through hole, the locking piece 5 is aligned with the force receiving structure in the process of acting with the rotating piece 3, the pin shaft penetrates the rotating piece 3 and is connected with the pin hole 80 of the air cylinder 8 when locked, and the locking piece 5 extends into the pin hole 80, that is, the locking piece 5 is locked with the force receiving structure, so that the air cylinder 8 can act under the driving of the rotating piece 3.

[0043] The gas pump in the embodiment is a bidirectional gas pump, referring to Figure 10That is, the air pump has two air inlet and outlet holes 40. When one of the air inlet and outlet holes 40 is pressurized, the output shaft of the air pump extends and drives the locking member 5 to extend into the pin hole 80; when the other air inlet and outlet hole 40 is pressurized, the output shaft of the air pump retracts and exits the pin hole 80. Since the air inlet and outlet holes 40 of the air pump need to be connected to the air pipe, and at the same time the air pump needs to rotate with the rotating member 3 and move up and down, the tightening device further comprises a fixed end air pipe 700, a rotating end air pipe 710, and a pneumatic slip ring 7 arranged between the lower support plate 11 and the rotating member 3. The pneumatic slip ring 7 is arranged around the floating shaft 21, and the pneumatic slip ring 7 comprises a fixed segment 70 fixedly arranged relative to the lower support plate 11 and a rotating segment 71 fixedly arranged relative to the rotating member 3. The fixed end air pipe 700 is in communication with the fixed segment 70, and the rotating end air pipe 710 is in communication with the rotating segment 71. The fixed end air pipe 700 and the rotating end air pipe 710 are in communication through the pneumatic slip ring 7, and the rotating end air pipe 710 is in communication with the air inlet and outlet hole 40 of the air pump.

[0044] Referring to Figure 1 , 10 , the pneumatic slip ring 7 is a commonly used component in the mechanical field, which can maintain continuous transmission of gas during rotation. The pneumatic slip ring 7 comprises a fixed segment 70 and a rotating segment 71. A connecting column 110 is fixedly arranged below the lower support plate 11, and a mounting plate 15 is fixedly arranged below the connecting column 110. The mounting plate 15 is provided with a through hole, and the fixed segment 70 of the pneumatic slip ring 7 passes through the mounting plate 15 through the through hole and is fixedly connected with the mounting plate 15. The fixed segment 70 of the pneumatic slip ring 7 is fixedly installed on the lower support plate 11 through the mounting plate 15 and the connecting column 110. The rotating segment 71 of the pneumatic slip ring 7 is tightly fitted and fixed to the lower end of the lower shaft body 211. The upper end of the rotating member 3 is formed with a connecting groove, and the rotating segment 71 of the pneumatic slip ring 7 is partially inserted into the connecting groove and tightly connected therewith. In this way, when the rotating drive mechanism 2 is working, the rotating member 3 and the rotating segment 71 of the pneumatic slip ring 7 can be driven to rotate synchronously, thereby achieving automatic tightening.

[0045] The rotating member 3 is further provided with a detection sensor 6 which is linked with the rotating drive mechanism 2. The probe of the detection sensor 6 is directed towards the central axis of the rotating member 3, and the length axis of the detection sensor 6 is parallel to the length axis of the locking member 5. In this embodiment, the detection sensor 6 is a laser sensor. The detection sensor 6 can be replaced by an infrared sensor, a camera, etc., which detects the pin hole 80 or the protrusion structure through the infrared sensor and the camera.

[0046] The output end of the detection sensor 6 is connected with the input end of the controller, the driving end of the lifting power source, the rotating driving mechanism 2 and the locking driving mechanism 4 are connected with the output end of the controller, the lifting power source, the rotating driving mechanism 2, the locking driving mechanism 4 and the detection sensor 6 are connected with the controller, the controller can receive the detection signal from the detection sensor 6, process the received detection signal and issue corresponding execution command to the lifting power source, the rotating driving mechanism 2 and the locking driving mechanism 4, the modular design makes the components of the tightening device work cooperatively, easy to maintain and upgrade. The controller makes the automatic tightening assembly provide more accurate tightening torque, thereby reducing the assembly quality problem and improving the reliability and assembly quality of the product.

[0047] Referring to Figure 6 , 7 , 8, when the assembly operation is performed, the compression cylinder 88 is positioned at a predetermined position, so that the horizontal position information of the pin hole 80 arranged on the side of the compression cylinder 8 is easy to determine. The rotating member 3 can drive the detection sensor 6 to move along the vertical direction to the same plane as the pin hole 80 through the lifting action, and then drive the detection sensor 6 to rotate through the rotating action. The laser sensor as the detection sensor 6 is aligned with the pin hole 80 as the force receiving structure during the rotating process, and when the two are aligned, the time length of the reflected laser received by the laser sensor changes, so that the position of the pin hole 80 is determined. Then the locking member 5 is driven to act by the rotating member 3 to align with the pin hole 80.

[0048] After the locking member 5 is inserted into the pin hole 80 on the compression cylinder 8 to achieve locking, in the vertical direction, the rotating member 3 abuts against the compression cylinder 8 through the locking member 5, and then the controller controls the power source to work to drive the upper support plate 10 to move downward. In this process, because the compression cylinder 8 limits the rotating member 3 in the vertical direction, and the rotating member 3 limits the lower support plate 11 in the vertical direction, the lower support plate 11 cannot move downward in the vertical direction. Therefore, the upper support plate 10 can move close to the lower support plate 11 to overcome the elastic force of the compression spring, so that the compression spring generates greater deformation. When the rotating member 3 drives the compression cylinder 8 to rotate through the rotating action, because the compression cylinder 8 is screwed relative to the dynamic side support conductor as the static side support conductor (dynamic side support conductor), the compression cylinder 8 not only rotates, but also moves downward. In this process, the rotating member 33 and the lower support plate 11 move downward with the compression cylinder 8 through the elastic force of the compression spring.

[0049] The above only describes the preferred embodiments of the present application, and does not limit the technical solutions of the present application in any way. Those skilled in the art should understand that the technical solutions can be modified and replaced in several simple ways without departing from the spirit and principles of the present application, and these modifications and replacements also belong to the protection scope covered by the claims.

Claims

1. An automated assembly tightening device for circuit breakers, characterized by, The lifting assembly comprises a lifting seat (1) and a lifting power source driving the lifting seat (1) to perform lifting movement, the rotating assembly comprises a rotating driving mechanism (2) and a rotating part (3), the rotating part (3) is connected with the driving end of the rotating driving mechanism (2), the rotating driving mechanism is fixed on the lifting seat (1), and the output end of the rotating driving mechanism (2) is connected with the rotating part (3) through a floating shaft (21); the locking assembly is arranged on the rotating part (3), and the locking assembly comprises a locking driving mechanism (4) and a locking part (5); the locking driving mechanism (4) drives the locking part (5) to be inserted into or withdrawn from the pin hole (80) of the air cylinder (8); The shell of the rotating driving mechanism (2) is fixed on the upper surface of the upper support plate (10), the driving end of the rotating driving mechanism (2) is fixedly connected with the floating shaft (21), the floating shaft (21) penetrates through the upper support plate (10), the lower support plate (11) and the top of the rotating part (3); the rotating part (3) is in a hollow structure, and in use, the air cylinder (8) is placed in the hollow accommodating groove (30) of the rotating part (3); The floating shaft (21) comprises an upper shaft body (210) and a lower shaft body (211), the upper shaft body (210) penetrates through the upper support plate (10) and is fixedly connected with the output end of the rotating driving mechanism (2), one end of the lower shaft body (211) penetrates through the lower support plate (11) and is connected with the upper shaft body (210), and the other end is fixedly connected with the rotating part (3); The locking driving mechanism (4) is a gas pump, the locking part (5) is a pin shaft, the shell of the gas pump is fixedly connected with the outer wall of the rotating part (3), the output end of the gas pump is connected with the pin shaft, a through hole is formed in the locking part (5), and when the locking part (5) is locked, the pin shaft penetrates through the rotating part (3) and is connected with the pin hole (80) of the air cylinder (8).

2. The automated assembly and tightening device for circuit breakers according to claim 1, characterized in that, The lifting seat (1) comprises an upper support plate (10), a lower support plate (11) and an elastic part (13), the upper surface of the upper support plate (10) is connected with the driving end of the lifting power source; the upper support plate (10) and the lower support plate (11) are arranged in parallel at intervals, the elastic part (13) is arranged in a compressed state between the upper support plate (10) and the lower support plate (11), the upper end of the elastic part (13) abuts against the lower surface of the upper support plate (10), and the lower end abuts against the upper surface of the lower support plate (11).

3. The automated assembly and tightening device for circuit breakers according to claim 2, characterized in that, The upper surface of the lower support plate (11) is provided with a limiting column (14), and the length of the limiting column (14) is less than the length of the elastic part (13) when the elastic part (13) is not in use.

4. The automated assembly and tightening device for circuit breakers according to claim 3, characterized in that, The limiting mechanism (12) comprises a limiting rod and a limiting sleeve, one end of the limiting rod is connected with the lower surface of the upper support plate (10), the other end penetrates through the lower support plate (11) and is matched with the limiting sleeve; and the elastic part (13) is sleeved on the limiting rod.

5. The automated assembly tightening device for circuit breakers of claim 1, wherein, The upper shaft body (210) and the rotating driving mechanism (2) are connected through a spline pin; and the upper shaft body (210) and the lower shaft body (211) are connected through a spline.

6. The automated assembly tightening device for circuit breakers of claim 1, wherein, The rotating member (3) is further provided with a detection sensor (6) which is linked with the rotating driving mechanism (2), the probe of the detection sensor (6) is directed to the central axis of the rotating member (3), and the length axis of the detection sensor (6) is parallel to the length axis of the locking member (5).

7. The automated assembly and tightening device for circuit breakers according to claim 6, characterized in that, The controller is further included, the output end of the detection sensor (6) is connected with the input end of the controller, and the driving end of the lifting power source, the rotating driving mechanism (2) and the locking driving mechanism (4) is connected with the output end of the controller.

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