Fan drive chain adjustable transfer device and working method thereof

Abstract

The application discloses a wind turbine transmission chain adjustable transfer device and a working method, which is provided with seven points of coordinately adjustable support points and angle inclination systems and a bottom self-adjustable detachable telescopic base during the transmission chain transportation process; the wind turbine transmission chain adjustable transfer device comprises omnibearing movable bottom walking wheels, a detachable transportation device base, bearing seat support devices, gear box torsion arm support devices, gear box base supports and control cabinets; the application is a wind power transmission chain transportation device with reasonable design and a correct and effective use method; before the transmission chain transportation device is used, the installation inclination angle of the transmission chain on the rack and the appearance structure of the gear box torsion arm are measured, the inclination angle is adjusted by adjusting the extension length of the hydraulic cylinders on the two sides of the bearing seat installation contact surface of the transmission chain transportation device, the gear box and the main shaft shafting concentricity is ensured, the damage of the main shaft bearing and the internal bearing of the gear box is avoided, and the collision between the gear box bottom oil shell and the transportation device is effectively avoided.

Description

Technical Field

[0001] This invention pertains to wind turbine transmission chain transfer technology, specifically relating to a self-adjusting state device and working method for wind turbine transmission chains during transfer in response to different road conditions. Background Technology

[0002] As the megawatt capacity of wind turbines increases year by year, larger megawatts mean larger volumes. To meet transportation constraints, the transmission chain system needs to be transported separately from the main frame. The transmission chain system is typically a drive structure connecting the main shaft and gearbox. Due to the differences in transmission chain structure and its irregular shape, a dedicated transportation device is required. Because different turbines have different windward angles, the overall tilt angle of the transmission chain currently falls into three main categories: 5°, 6°, and 8°, as well as differences in the gearbox torque arm structure.

[0003] Currently, there are generally two methods for transporting drive chains in the industry. One method involves hoisting the gearbox and main shaft as a whole and then using rigid transport fixtures to transfer it to the wind farm. The advantage of this method is that the entire drive chain is hoisted without the need for secondary disassembly and reassembly. However, transporting in a completely rigid contact manner can easily damage the alignment of the gearbox shaft system and the internal bearing structure. Furthermore, the transport device is specialized and lacks versatility. The other method involves shipping the gearbox and shaft system separately to the wind farm, where they are then assembled with the main shaft upon arrival. The advantage of this method is that the gearbox and shaft system are well protected, and the bearings are not damaged. However, this increases the workload of the wind farm installation and is frequently affected by the wind farm's operating conditions. Therefore, there is an urgent need to redesign a convenient, flexible, adjustable, highly versatile, and safe solution to meet the requirements of flexible, safe, and reliable transport of drive chain devices with various structures. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides an adjustable transfer device for wind turbine transmission chains and its working method. The flexible connection of the transmission chain transport device ensures the alignment of the shaft system of the transport transmission chain and reduces damage to the internal bearings. This invention is applicable to the transport of transmission chains for 4MW and above units. It is detachable, easy to assemble, has high space utilization, and high versatility.

[0005] This invention is achieved through the following technical solution: This invention discloses an adjustable transfer device for a wind turbine drive chain. This device has 7 coordinateable conformal support points and an angle tilting system, as well as a self-adjusting detachable telescopic base at the bottom, during the transport of the drive chain. The adjustable transfer device for the wind turbine drive chain includes omnidirectional movable base wheels, a detachable transport device base, bearing seat support devices, gearbox torque arm support devices, gearbox base support, and a control cabinet. Four bearing seat support devices are fixedly installed on the detachable transport device base, two gearbox torque arm support devices are installed on the detachable transport device base, a control cabinet is installed on the side of the detachable transport device base, a gearbox base support is fixedly installed at one end of the detachable transport device base, and an omnidirectional movable base wheel is fixedly installed on both sides of the other end of the detachable transport device base.

[0006] The omnidirectional movable base with wheels includes a rechargeable drive motor, a universal rubber wheel with rolling bearings, an electric drive connecting shaft, a rigid spring, a retractable hydraulic cylinder, and a connecting and fixing support. The rechargeable drive motor is located at the bottom of the retractable hydraulic cylinder and is connected to the universal rubber wheel with rolling bearings via the electric drive connecting shaft. The connecting and fixing support is fitted on the retractable hydraulic cylinder, and a rigid spring is fitted between the connecting and fixing supports on the retractable hydraulic cylinder.

[0007] The detachable transport device base includes a movable gearbox torque arm support beam, a detachable bottom longitudinal beam, a gearbox support connecting plate, a bearing seat support connecting plate, and a detachable gearbox tail conformal support. The movable gearbox torque arm support beam is fixedly connected to the detachable bottom longitudinal beam, and the gearbox support connecting plate is fixedly installed on the movable gearbox torque arm support beam. A detachable gearbox tail conformal support is installed at one end of the detachable bottom longitudinal beam, and a bearing seat support connecting plate is installed at the other end of the detachable bottom longitudinal beam.

[0008] The movable gearbox torque arm support beam includes a drive motor, a fixed plate, a rotating screw, a movable slider, and fixed support rods. The drive motor is fixedly connected to the fixed plate, and the rotating screw is fixedly connected to the middle of the drive motor. The rotating screw is set between two fixed plates. Four fixed support rods are also set between the two fixed plates. A movable slider is sleeved on the four fixed support rods and the rotating screw.

[0009] The detachable bearing seat support device includes a hydraulic telescopic column, a connecting base plate, a connecting pin, and an angle-adjustable bearing seat support; the hydraulic telescopic column is provided on the connecting base plate, and the angle-adjustable bearing seat support is connected to the top of the hydraulic telescopic column via a connecting pin.

[0010] The angle-adjustable bearing housing support includes an angle sensor, a servo hydraulic cylinder, a limit block, positioning pins, and a connecting plate. The servo hydraulic cylinder is connected to the connecting plate, the limit block is fixedly connected to the top of the servo hydraulic cylinder, the angle sensor is fixedly connected to the bottom of the limit block, and two positioning pins are fixedly installed on the top of the limit block.

[0011] The gearbox torque arm support device includes an electrically driven folding support column and a detachable gear torque arm conformal support set on the top of the electrically driven folding support column.

[0012] This invention also discloses a method for operating an adjustable transfer device for a fan drive chain:

[0013] (1) When using the adjustable transfer device of the wind turbine drive chain, if the swing amplitude of the drive chain is too large during the docking process between the drive chain and the transport device, it will affect the docking between the drive chain and the transport device. The omnidirectional movement of the transport device can be achieved by fine-tuning the electric walking wheels of the transport device to avoid collision caused by the swing amplitude of the hoisting of the trolley drive chain being greater than that of the transport device.

[0014] (2) Adjust the bearing seat support surface of the transport device to be consistent with the tilt angle of the frame by driving the servo hydraulic cylinder with the angle sensor;

[0015] (3) The bearing housing prevents the bearing housing support surface from sliding displacement with the positioning pin and the limiting block of the bearing housing support surface of the transport device.

[0016] (4) The bearing seat support surface of the transport device can be disassembled, and different support installation tooling bases are selected according to the mounting hole size of the bearing seat of different units;

[0017] (5) The overall height of the bearing housing support column can be adjusted by hydraulic cylinder.

[0018] (6) To address the installation of torque arms for gearboxes with different structures, replacing bearing bushes and square elastomers;

[0019] (7) The position of the gearbox torque arm support shall be adjusted according to the different gearbox torque arm structures and their outer dimensions.

[0020] (8) The entire transport device can be disassembled and assembled. In the prior art, one transport vehicle can usually transport two transport devices, but now one transport vehicle can transport six transport devices.

[0021] The working method of the adjustable transfer device for the fan drive chain of the present invention specifically includes the following steps:

[0022] (1) Hoist the transmission chain transport device to the pre-installation position and test whether the transport device can achieve all-round control and movement;

[0023] (2) Operate the control cabinet at the bottom of the transport device, and transmit the position signal to the servo-driven hydraulic cylinder through the angle sensor at the bottom of the bearing seat support to adjust the tilt angle of the support surface, so as to ensure that the adjustment angle of the bearing seat support plate is consistent with the tilt angle of the hoisting transmission chain.

[0024] (3) Based on the shape and structure of the gearbox torque arm of the transport transmission chain, replace the support point at the gearbox torque arm of the transport device with a bearing support or a square elastic support.

[0025] (4) Hoist the transmission chain to the top of the transport device, keep the distance between the vehicle and the transport device and stop the descent. Operate the travel handle of the transmission chain transport device to move the transmission chain transport device in all directions to ensure that the positioning pin of the bearing seat mounting surface of the transport device corresponds to the bearing seat bolt mounting hole.

[0026] (5) According to the transmission chain height of different units, drive the hydraulic cylinder of the bearing housing support tool to a certain position, so that the support surface is in contact with the bearing housing ground, the limit block achieves the limit function, and the positioning pin corresponds to the bearing housing hole.

[0027] (6) By operating the remote control, the longitudinal position of the gearbox torque arm support can be adjusted by driving the motor to rotate forward and backward. The slider at the bottom of the gearbox torque arm can adjust the horizontal position of the support.

[0028] (7) Operate the electrical control cabinet to drive the lifting device of the folding support under the gearbox torque arm.

[0029] Preferably, in step (2) above, the inclination angle of the support surface is adjusted to 5°, 6° or 8°.

[0030] This invention relates to an adjustable transport device for wind turbine drive chains, primarily comprising a base for a fully movable transport device, a retractable bearing seat support, a conformal, detachable, self-adjusting angle bearing seat support plate, a conformal gearbox torque arm support, a sliding gearbox torque arm column, and a rear support. The technical problem this invention aims to solve is to provide a rationally designed wind turbine drive chain transport device and a correct and effective method of use. Before use, the device measures the installation tilt angle of the drive chain on the frame and the external structure of the gearbox torque arm. The tilt angle is adjusted by extending or retracting the hydraulic cylinders on both sides of the bearing seat mounting contact surface of the drive chain transport device, ensuring the concentricity of the gearbox and main shaft system, preventing damage to the main shaft bearings and the internal bearings of the gearbox, and effectively avoiding collisions between the oil pan at the bottom of the gearbox and the transport device.

[0031] The beneficial effects of this invention are as follows: This invention provides an adjustable transfer device for wind turbine drive chains and its working method. The flexible connection of the drive chain transport device ensures the alignment of the shaft system of the transport drive chain and reduces damage to internal bearings. This invention is applicable to the transport of drive chains for 4MW and above units. It is detachable, easy to assemble, has high space utilization, and high versatility. This invention addresses the shortcomings of existing drive chain transport devices, aiming to solve the technical defects of rigid damage during transport and the single-use nature of transport equipment. The adjustable transfer device for wind turbine drive chains of this invention effectively solves the problem of the large space occupied by transport devices during the recovery process. Existing technologies allow only two drive chain transport devices to be transported per vehicle. By using the adjustable transfer device for wind turbine drive chains of this invention, the number of drive chain transport devices that can be recovered per vehicle can be increased. This invention ensures flexible contact during drive chain transport and indirectly protects the shaft system, avoiding damage to the bearings of the gearbox and main shaft.

[0032] This invention presents a highly versatile adjustable transfer device for wind turbine drive chains. By designing bearing seat support plates and gearbox torque arm support seats with different conformal shapes, the above structure is made detachable. Different support seats can be replaced for units with different power ratings, increasing the versatility of the transport device. The transport device in this invention is easy to move, reducing the investment of manpower and other lifting equipment. Before being loaded, the drive chain transport device of this invention can achieve centering work during factory transfer and assembly processes via electric drive wheels, facilitating handling and reducing manpower. This invention achieves the convenience of the tooling through the combined use of two directional wheels and universal wheels, reducing labor consumption. This invention can meet multiple functional requirements. While fulfilling the needs of drive chain transport, it can also be used as a simple component transfer cart, and can transport some lightweight components when the rigid spring is not fully compressed.

[0033] This invention utilizes a combination of the bearing seat support point, gearbox torque arm support point, bearing seat support telescopic device, bearing bush support device, and omnidirectional displacement mechanism at the bottom of the transport device to meet the needs of transporting transmission chains in different unit configurations. This reduces damage to the transmission chain shaft system and avoids axial displacement. Compared to traditional transmission chain transport devices, the adjustable transport device for the fan transmission chain in this invention has a more optimized and adaptable structure, providing better flexibility and reducing rigid damage to the transmission chain during assembly and transport. This adjustable transport device for the fan transmission chain boasts high efficiency, a small structural size during recovery, facilitates transportation, and is easy to disassemble, meeting the needs of various machine types. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural schematic diagram of the adjustable transport device for the fan drive chain of the present invention;

[0035] Figure 2 This is a structural diagram of a fully movable base with wheels;

[0036] Figure 3 This is a three-dimensional structural diagram of the detachable transport device base;

[0037] Figure 4 This is a three-dimensional structural diagram of the movable gearbox torque arm support beam;

[0038] Figure 5 This is a structural schematic diagram of a detachable bearing housing support device;

[0039] Figure 6 This is a schematic diagram of the three-dimensional structure of the adjustable bearing housing support;

[0040] Figure 7 This is a three-dimensional structural diagram of the gearbox torque arm support device;

[0041] Figure 1 Components: 1-All-around movable base with wheels; 2-Detachable transport device base; 3-Bearing seat support device; 4-Gearbox torque arm support device; 5-Gearbox base support; 6-Control cabinet; 11-Charging drive motor; 12-Universal rubber wheels with rolling bearings; 13-Electric drive connecting shaft; 14-Rigid spring; 15-Retractable hydraulic cylinder; 16-Connecting fixed support; 21-Modible gearbox torque arm support beam; 22-Detachable bottom longitudinal beam; 23-Gearbox support connecting plate; 24-Bearing seat support. 25-Connecting plate; 211-Removable gearbox tail conformal support; 212-Drive motor; 213-Fixing plate; 214-Rotating screw; 215-Moving slider; 216-Fixed support rod; 31-Hydraulic telescopic column; 32-Connecting base plate; 33-Connecting pin; 34-Angle adjustable bearing seat support; 341-Angle sensor; 342-Servo hydraulic cylinder; 343-Limit block; 344-Positioning pin; 345-Connecting plate; 41-Removable gear torsion arm conformal support; 42-Electrically driven folding support column. Detailed Implementation

[0042] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0043] like Figures 1 to 7As shown, this invention discloses an adjustable transport device for a wind turbine drive chain. This device features seven coordinateable conformal support points and an angle tilting system, as well as a self-adjusting, detachable, and telescopic base at the bottom, during the transport of the drive chain. The adjustable transport device includes omnidirectional movable base wheels 1, a detachable transport device base 2, bearing seat support devices 3, gearbox torque arm support devices 4, gearbox base support 5, and a control cabinet 6. Four bearing seat support devices 3 are fixedly installed on the detachable transport device base 2, two gearbox torque arm support devices 4 are installed on the detachable transport device base 2, one control cabinet 6 is installed on the side of the detachable transport device base 2, one gearbox base support 5 is fixedly installed at one end of the detachable transport device base 2, and one omnidirectional movable base wheel 1 is fixedly installed on both sides of the other end of the detachable transport device base 2.

[0044] The omnidirectional movable base with wheels 1 includes a rechargeable drive motor 11, a universal rubber wheel with rolling bearing 12, an electric drive connecting shaft 13, a rigid spring 14, a retractable hydraulic cylinder 15, and a connecting and fixing support 16. The rechargeable drive motor 11 is located at the bottom of the retractable hydraulic cylinder 15. The rechargeable drive motor 11 is connected to the universal rubber wheel with rolling bearing 12 through the electric drive connecting shaft 13. The connecting and fixing support 16 is sleeved on the retractable hydraulic cylinder 15, and the rigid spring 14 is sleeved on the retractable hydraulic cylinder 15 between the connecting and fixing supports.

[0045] The detachable transport device base 2 includes a movable gearbox torque arm support beam 21, a detachable bottom longitudinal beam 22, a gearbox support connecting plate 23, a bearing seat support connecting plate 24, and a detachable gearbox tail conformal support 25. The movable gearbox torque arm support beam 21 is fixedly connected to the detachable bottom longitudinal beam 22, the gearbox support connecting plate 23 is fixedly installed on the movable gearbox torque arm support beam 21, the detachable gearbox tail conformal support 25 is installed at one end of the detachable bottom longitudinal beam 22, and the bearing seat support connecting plate 24 is installed at the other end of the detachable bottom longitudinal beam 22.

[0046] The movable gearbox torque arm support beam 21 includes a drive motor 211, a fixed plate 212, a rotating screw 213, a movable slider 214, and a fixed support rod 215. The drive motor 211 is fixedly connected to the fixed plate 212, and the rotating screw 213 is fixedly connected to the middle of the drive motor 211. The rotating screw 213 is located between the two fixed plates 212. Four fixed support rods 215 are also located between the two fixed plates 212. A movable slider 214 is sleeved on the four fixed support rods 215 and the rotating screw 213.

[0047] The detachable bearing seat support device 3 includes a hydraulic telescopic column 31, a connecting base plate 32, a connecting pin 33, and an angle-adjustable bearing seat support 34; the hydraulic telescopic column 31 is provided on the connecting base plate 32, and the angle-adjustable bearing seat support 34 is connected to the top of the hydraulic telescopic column 31 through the connecting pin 33.

[0048] The angle-adjustable bearing seat support 34 includes an angle sensor 341, a servo hydraulic cylinder 342, a limit block 343, positioning pins 344, and a connecting plate 345. The servo hydraulic cylinder 342 is connected to the connecting plate 345. The limit block 343 is fixedly connected to the top of the servo hydraulic cylinder 342. The angle sensor 341 is fixedly connected to the bottom of the limit block 343. Two positioning pins 344 are fixedly installed on the top of the limit block 343.

[0049] The gearbox torque arm support device 4 includes an electrically driven folding support column 42 and a detachable gear torque arm conformal support 41 disposed on the top of the electrically driven folding support column 42.

[0050] The present invention also discloses a working method of an adjustable transfer device for a wind turbine drive chain: (1) When using the adjustable transfer device for a wind turbine drive chain, during the docking process between the drive chain and the transport device, if the swing amplitude of the drive chain is too large, it will affect the docking between the drive chain and the transport device. By finely adjusting the electric walking wheels of the transport device, the omnidirectional movement of the transport device can be achieved, so as to avoid collision caused by the swing amplitude of the hoisting of the trolley drive chain being greater than that of the transport device; (2) The angle sensor drives the servo hydraulic cylinder to adjust the tilt angle between the bearing seat support surface of the transport device and the frame; (3) The bearing seat prevents the bearing seat support surface from being supported by the positioning pin and the limit block. (4) The bearing support surface of the transport device can be disassembled, and different support installation tool bases are selected according to the mounting hole size of the bearings of different units; (5) The overall height of the bearing support column can be adjusted by hydraulic cylinder; (6) The installation of the gearbox torque arm with different structure can be replaced by bearing bush type and square elastomer; (7) The gearbox torque arm support position is adjusted according to the different gearbox torque arm structure and its outer dimensions; (8) The transport device can be disassembled and assembled as a whole. In the prior art, one transport vehicle usually transports two transport devices, but now one transport vehicle can transport 6 transport devices.

[0051] The working method of the adjustable transfer device for the wind turbine transmission chain of the present invention specifically includes the following steps: (1) hoist the transmission chain transport device to the pre-installation position and test whether the transport device can achieve all-round control and movement; (2) operate the control cabinet at the bottom of the transport device, and transmit the position signal to the servo drive hydraulic cylinder through the angle sensor at the bottom of the bearing seat support to adjust the inclination angle of the support surface to 5°, 6° or 8°, so as to ensure that the adjustment angle of the bearing seat support plate is consistent with the tilt angle of the hoisting transmission chain; (3) according to the shape structure of the gearbox torque arm of the transport transmission chain, replace the support point at the gearbox torque arm of the transport device with a bearing support or a square elastic support; (4) hoist the transmission chain to the top of the transport device and keep it in motion. Stop the car from falling at a sufficient height from the transport device, operate the drive chain transport device walking handle, move the drive chain transport device in all directions, and ensure that the positioning pin of the bearing seat mounting surface of the transport device corresponds to the bearing seat bolt mounting hole; (5) According to the transmission chain height of different units, drive the hydraulic cylinder of the bearing seat support tool to a certain position, put the support surface into contact with the bearing seat ground, the limit block achieves the limit function, and the positioning pin corresponds to the bearing seat hole; (6) Operate the remote control, drive the motor to rotate forward and reverse, adjust the longitudinal position of the gearbox torque arm support, and the bottom slider of the gearbox torque arm can adjust the horizontal position of the support; (7) Operate the electrical control cabinet, drive the lifting device of the folding support below the gearbox torque arm.

[0052] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. An adjustable transfer device for a fan drive chain, characterized in that: The adjustable transfer device for the wind turbine transmission chain is equipped with 7 coordinateable conformal support points and an angle tilting system, as well as a bottom self-adjusting detachable telescopic base during transmission chain transportation. The adjustable transfer device for the wind turbine transmission chain includes an all-around movable base wheel (1), a detachable transport device base (2), a bearing seat support device (3), a gearbox torque arm support device (4), a gearbox base support (5), and a control cabinet (6). Four bearing seat support devices (3) are fixedly installed on the detachable transport device base (2), two gearbox torque arm support devices (4) are installed on the detachable transport device base (2), one control cabinet (6) is installed on the side of the detachable transport device base (2), one gearbox base support (5) is fixedly installed at one end of the detachable transport device base (2), and one all-around movable base wheel (1) is fixedly installed on both sides of the other end of the detachable transport device base (2). The detachable transport device base (2) includes a movable gearbox torque arm support beam (21), a detachable bottom longitudinal beam (22), a gearbox support connecting plate (23), a bearing seat support connecting plate (24), and a detachable gearbox tail conformal support (25); the movable gearbox torque arm support beam (21) is connected to the detachable bottom longitudinal beam (22), the gearbox support connecting plate (23) is provided on the movable gearbox torque arm support beam (21), the detachable gearbox tail conformal support (25) is provided at one end of the detachable bottom longitudinal beam (22), and the bearing seat support connecting plate (24) is provided at the other end of the detachable bottom longitudinal beam (22); The movable gearbox torque arm support beam (21) includes a drive motor (211), a fixed plate (212), a rotating screw (213), a movable slider (214), and a fixed support rod (215). The drive motor (211) is fixedly connected to the fixed plate (212), and the rotating screw (213) is fixedly connected to the middle of the drive motor (211). The rotating screw (213) is disposed between the two fixed plates (212), and the four fixed support rods (215) are also disposed between the two fixed plates (212). One movable slider (214) is sleeved on the four fixed support rods (215) and the rotating screw (213). The angle-adjustable bearing seat support (34) includes an angle sensor (341), a servo hydraulic cylinder (342), a limit block (343), a positioning pin (344), and a connecting plate (345); the servo hydraulic cylinder (342) is connected to the connecting plate (345), the limit block (343) is fixedly connected to the top of the servo hydraulic cylinder (342), the angle sensor (341) is fixedly connected to the bottom of the limit block (343), and two positioning pins (344) are fixedly provided on the top of the limit block (343).

2. The adjustable transfer device for a fan drive chain according to claim 1, characterized in that: The omnidirectional movable base walking wheel (1) includes a charging drive motor (11), a universal rubber wheel with rolling bearing (12), an electric drive connecting shaft (13), a rigid spring (14), a retractable hydraulic cylinder (15), and a connecting and fixing support (16). The charging drive motor (11) is provided at the bottom of the retractable hydraulic cylinder (15). The charging drive motor (11) is connected to the universal rubber wheel with rolling bearing (12) through the electric drive connecting shaft (13). The connecting and fixing support (16) is sleeved on the retractable hydraulic cylinder (15). The rigid spring (14) is sleeved on the retractable hydraulic cylinder (15) between the connecting and fixing supports.

3. The adjustable transfer device for a fan drive chain according to claim 1, characterized in that: The bearing seat support device (3) includes a hydraulic telescopic column (31), a connecting base plate (32), a connecting pin (33), and an angle-adjustable bearing seat support (34); the hydraulic telescopic column (31) is provided on the connecting base plate (32), and the angle-adjustable bearing seat support (34) is connected to the top of the hydraulic telescopic column (31) through the connecting pin (33).

4. The adjustable transfer device for a fan drive chain according to claim 1, characterized in that: The gearbox torque arm support device (4) includes an electrically driven folding support column (42) and a detachable gear torque arm conformal support (41) disposed on the top of the electrically driven folding support column (42).

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