New energy semi-trailer landing gear

Abstract

The application discloses a new energy semi-trailer landing gear and relates to the technical field of trailer supporting.The new energy semi-trailer landing gear comprises a control frame, an installation block is connected to the inside of the control frame in a sliding manner, a bevel gear one is rotationally connected to the bottom of the inside of the installation block in a limiting manner, drive shafts are rotationally connected to the left and right sides of the installation block in a limiting manner, bevel gears two are fixedly installed on the adjacent ends of the drive shafts, a rotating shaft is rotationally connected to the center of the inside of the control frame in a limiting manner, threaded rods are screw-connected to the left and right sides of the bottom of the control frame, and the top of the threaded rod is rotationally connected to the bottom of the installation block in a limiting manner.The new energy semi-trailer landing gear does not need additional connecting structures, can be directly installed at the bottom end of a trailer, is convenient for installing and supporting, can be applied to trailers with different height differences and different widths at the bottom, improves the adaptability of the landing gear, is convenient for operation, and can guarantee the stability of the support for the trailer when the ground is uneven and soft.

Description

Technical Field

[0001] This invention relates to the field of trailer support technology, specifically to a landing gear for a new energy semi-trailer. Background Technology

[0002] A semi-trailer is a heavy-duty transport vehicle connected to a tractor unit via a towing pin. It is mainly used for transporting large cargo. When detaching the trailer from the tractor unit, a landing gear needs to be installed on the front side of the trailer's bottom to ensure the trailer is placed stably. When detaching the trailer, the landing gear extends downwards, working with the trailer's rear tires to provide stable support. After connecting to the tractor unit, the landing gear retracts upwards, allowing the tractor unit to tow the trailer. In the field of new energy semi-trailers, with the development of intelligent technology, the control of the landing gear's raising and lowering has also changed from manual to electric.

[0003] For example, Chinese invention patent CN104925037B discloses a semi-trailer and its semi-trailer outrigger connection structure. The semi-trailer outrigger connection structure of this invention enables the semi-trailer outrigger connection structure to be quickly and accurately installed on the semi-trailer by setting a positioning device on the outrigger bracket. At the same time, it improves the assembly efficiency of the semi-trailer, reduces labor intensity, and improves the precision of the product. The semi-trailer of this invention improves the assembly efficiency and simplifies the manufacturing process by adopting the above-mentioned semi-trailer outrigger connection structure.

[0004] However, considering the aforementioned patents and existing technologies, the current undercarriages of new energy semi-trailers still have the following defects during use:

[0005] 1. Installation is not convenient enough and adaptability needs improvement. Due to the different sizes of trailers and the different bottom structures, there may be height differences when installing the control box and support frame. Therefore, in order to install the drive shaft between the control box and the support frame, the installation position of the control box and the support frame needs to be adjusted according to the different bottom structures of the trailer. In addition, due to the limitation of the length of the drive shaft, it cannot well meet the needs of trailers of different widths, which reduces the adaptability of the landing gear. As mentioned above, in order to meet the convenience of outrigger installation and adaptability, a connecting structure needs to be installed at the bottom of the trailer first, and then the outrigger is installed on the side of the connecting structure according to the requirements. However, this also increases the cost and installation strength. Moreover, the mounting bolts are prone to deformation under stress when the outriggers are installed on the side.

[0006] 2. When the existing electric landing gear is in use, the support legs on both sides extend downwards simultaneously to complete the support. However, when the ground is uneven, the support is prone to instability. When controlling them separately, manual control and adjustment are required, which reduces the convenience of operation. Furthermore, when facing soft ground, the support legs cannot guarantee the support strength and are prone to sinking, which reduces the stability of the support. Summary of the Invention

[0007] The purpose of this invention is to address the problems of inconvenient installation, poor adaptability, and instability when the electric landing gear drives the support legs on both sides to extend downwards simultaneously. Furthermore, separate control requires manual adjustment, reducing operational convenience. Additionally, the support legs cannot guarantee sufficient support on soft ground, leading to sinking and reduced stability. Therefore, this invention provides a landing gear for new energy semi-trailers.

[0008] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0009] A new energy semi-trailer landing gear includes a control frame. An installation block is slidably connected to the inside of the control frame. A bevel gear is rotatably connected to the bottom of the inner side of the installation block. Drive shafts are rotatably connected to the left and right sides of the installation block. Bevel gears are fixedly installed at adjacent ends of the drive shafts. A rotating shaft is rotatably connected to the center of the control frame. Threaded rods are threaded to the left and right sides of the bottom of the control frame, with the tops of the threaded rods rotatably connected to the bottom of the installation block. Support frames are symmetrically arranged on the left and right sides of the control frame. Support columns are slidably connected to the inside of the support frames. A lead screw is rotatably connected to the center of the top of the support frames, and the lead screw is threaded downwards to the support column. A transmission assembly is provided between the sidewall of the support frame and the lead screw. A transmission control assembly is provided at the bottom of the support column. A transmission shaft is rotatably connected between the drive shaft and the transmission assembly.

[0010] Furthermore, the second bevel gear is located on the left and right sides of the top of the first bevel gear, and both mesh with the first bevel gear. Therefore, during the rotation of the first bevel gear, it can drive the second bevel gears on both sides to rotate simultaneously.

[0011] Furthermore, the rotating shaft passes through the mounting block and the first bevel gear, and the first bevel gear and the rotating shaft are connected by upper and lower limit sliding connection. Therefore, while the first bevel gear can move up and down on the outside of the rotating shaft, the rotation of the rotating shaft can also drive the first bevel gear to rotate.

[0012] Furthermore, the control frame has symmetrical grooves on its left and right sides, and the drive shaft slides up and down inside the grooves to allow for the up and down movement of the drive shaft.

[0013] Furthermore, the transmission assembly includes a driven shaft. Each of the adjacent sides of the top of the left and right support frames is rotatably connected to a driven shaft. A connecting shaft is slidably connected to the driven shaft on one side inside the support frame. A spring is fixedly connected between the inner end of the connecting shaft and the inner wall of the driven shaft. A bevel gear three is fixedly installed at the end of the connecting shaft away from the driven shaft. A bevel gear four is fixedly installed on the outer periphery of the top of the lead screw, and the bevel gear four meshes with the bevel gear three, so that when the bevel gear three rotates, it can drive the lead screw to rotate through the bevel gear four. A magnetic ring is fixedly installed on the side of the bevel gear four away from the lead screw. An electromagnetic ring is fixedly installed on the inner wall of the support frame at a position aligned with the magnetic ring.

[0014] Furthermore, the two ends of the transmission shaft are connected to the drive shaft and the driven shaft respectively via couplings to achieve transmission between the drive shaft and the driven shaft.

[0015] Furthermore, the transmission control assembly includes a telescopic rod, with the telescopic rod slidably connected to the inner limit of the bottom of the support column, a base fixedly installed at the bottom end of the telescopic rod, a limit seat slidably connected to the upper limit of the telescopic rod inside the bottom of the support column, a spring two fixedly connected between the bottom end of the limit seat and the top end of the telescopic rod, toothed blocks evenly fixedly connected to the periphery of the limit seat, and a threaded sleeve rotatably connected to the outer limit of the bottom of the support column.

[0016] Furthermore, the threaded sleeve wraps around the outside of the limiting seat, the toothed block extends outward, and the outer teeth of the toothed block are all threadedly connected to the inner side of the threaded sleeve. Therefore, by rotating the threaded sleeve, the toothed block and the limiting seat can be moved up and down.

[0017] Furthermore, when the base is in the power-on state, when the top end face of the base moves up to contact the bottom end face of the support column, the electromagnetic ring can be energized. After the electromagnetic ring is energized, the magnetic poles between the adjacent surfaces of the electromagnetic ring and the magnetic ring are opposite magnetic poles. Therefore, when the electromagnetic ring is energized, it can attract the bevel gear three through the magnetic ring.

[0018] Furthermore, a motor is fixedly installed at the bottom of the control frame, and the motor is connected to the rotating shaft for transmission, thereby driving the rotating shaft to rotate.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. This invention utilizes a design where the mounting block inside the control frame drives the first and second bevel gears to move up and down. After the control frame and support frame are installed, the drive shaft and driven shaft can be aligned according to their different heights. Different lengths of transmission shafts can be selected for transmission connection based on the different spacing, thereby driving the downward movement of the support columns on both sides and completing the support. Therefore, no additional connection structure is required, and it can be directly installed at the bottom of the trailer. This facilitates the installation of the support and is also suitable for trailers with different height differences and widths at the bottom, improving the adaptability of the landing gear.

[0021] 2. This invention, through the coordinated design of the transmission component and the transmission control component, enables separate control of the two support columns and allows them to remain stably stationary after support is completed. This provides more stable support on uneven ground without the need for manual separate control; simply starting the motor is sufficient, making operation more convenient. Furthermore, the support columns only remain stably stationary after sufficient support force is achieved, and the required support force is adjusted according to the weight of the trailer, thus improving the stability of trailer support on soft ground. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0024] Figure 3 This is a partial cross-sectional three-dimensional structural schematic diagram of the present invention;

[0025] Figure 4 This is a cross-sectional three-dimensional structural diagram of the control frame of the present invention;

[0026] Figure 5 This is a cross-sectional three-dimensional structural diagram of the control frame of the present invention;

[0027] Figure 6 This is a cross-sectional three-dimensional structural diagram of the support frame of the present invention;

[0028] Figure 7 This is a partial cross-sectional three-dimensional structural diagram of the top interior of the support frame of the present invention;

[0029] Figure 8 This is a cross-sectional three-dimensional structural diagram of the bottom of the support frame of the present invention;

[0030] Figure 9 This is an exploded three-dimensional cross-sectional view of the bottom of the support frame of the present invention.

[0031] Reference numerals in the attached diagram: 1. Control frame; 2. Mounting block; 3. Bevel gear one; 4. Drive shaft; 5. Bevel gear two; 6. Rotating shaft; 7. Threaded rod; 8. Support frame; 9. Support column; 10. Lead screw; 11. Transmission assembly; 111. Driven shaft; 112. Connecting shaft; 113. Spring one; 114. Bevel gear three; 115. Bevel gear four; 116. Magnetic ring; 117. Electromagnetic ring; 12. Transmission control assembly; 121. Telescopic rod; 122. Base; 123. Limit seat; 124. Spring two; 125. Gear block; 126. Threaded sleeve; 13. Transmission shaft; 14. Slide groove; 15. Motor. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0033] A preferred embodiment of the present invention, namely a new energy semi-trailer landing gear, will be described in detail below, such as... Figures 1-7 As shown, a new energy semi-trailer landing gear includes a control frame 1. An installation block 2 is slidably connected to the inside of the control frame 1. A bevel gear 3 is rotatably connected to the bottom of the inner side of the installation block 2. A drive shaft 4 is rotatably connected to the left and right sides of the installation block 2. Slide grooves 14 are symmetrically opened on the left and right sides of the control frame 1. The drive shaft 4 is slidably connected to the inside of the slide grooves 14 to satisfy the up and down movement of the drive shaft 4. A bevel gear 5 is fixedly installed on each adjacent end of the drive shaft 4. The bevel gear 5 is located on the left and right sides of the top of the bevel gear 3 and meshes with the bevel gear 3. Therefore, during the rotation of the bevel gear 3, the bevel gears 5 on both sides can be driven to rotate simultaneously.

[0034] A rotating shaft 6 is connected to the center of the control box 1. The rotating shaft 6 passes through the mounting block 2 and the bevel gear 3. The bevel gear 3 and the rotating shaft 6 are connected by upper and lower limit sliding connection. Therefore, while the bevel gear 3 can move up and down on the outside of the rotating shaft 6, the rotation of the rotating shaft 6 can also drive the bevel gear 3 to rotate.

[0035] The left and right sides of the bottom of the control frame 1 are threaded with threaded rods 7, and the top of the threaded rods 7 is rotatably connected to the bottom of the mounting block 2. Therefore, by rotating the threaded rods 7, the position of the mounting block 2 inside the control frame 1 can be adjusted up and down.

[0036] Support frames 8 are symmetrically arranged on the left and right sides of the control frame 1. Support columns 9 are slidably connected inside the support frames 8. A lead screw 10 is rotatably connected at the center of the top of the support frame 8, and the lead screw 10 is threaded downward to the support column 9. A transmission assembly 11 is arranged between the side wall of the support frame 8 and the lead screw 10. A transmission control assembly 12 is arranged at the bottom of the support column 9. A transmission shaft 13 is connected between the drive shaft 4 and the transmission assembly 11.

[0037] The transmission assembly 11 includes a driven shaft 111. The driven shaft 111 is rotatably connected to the adjacent side of the top of the left and right support frames 8. The two ends of the transmission shaft 13 are connected to the drive shaft 4 and the driven shaft 111 respectively through couplings to realize the transmission cooperation between the drive shaft 4 and the driven shaft 111.

[0038] The driven shaft 111 is internally limited and slidably connected to the connecting shaft 112 on one side inside the support frame 8. A spring 113 is fixedly connected between one end of the connecting shaft 112 inside the driven shaft 111 and the inner wall of the driven shaft 111. A bevel gear 114 is fixedly installed at the end of the connecting shaft 112 away from the driven shaft 111. A bevel gear 115 is fixedly installed on the outer periphery of the top of the lead screw 10, and the bevel gear 115 meshes with the bevel gear 114, so that when the bevel gear 114 rotates, it can drive the lead screw 10 to rotate through the bevel gear 115.

[0039] A motor 15 is fixedly installed at the bottom of the control box 1, and the motor 15 is connected to the rotating shaft 6 for transmission, thereby driving the rotating shaft 6 to rotate.

[0040] During installation, the control frame 1 is directly fixed to the center of the front bottom of the trailer with bolts. Then, the support frame 8 is directly and symmetrically fixed to the left and right sides of the control frame 1 at the bottom of the trailer with bolts. Then, according to the height difference between the control frame 1 and the support frame 8 after installation, the threaded rod 7 is rotated simultaneously. The threaded connection between the threaded rod 7 and the bottom of the control frame 1, and the limit rotation connection between the top of the threaded rod 7 and the mounting block 2, can drive the mounting block 2 to move up and down inside the control frame 1. This, in turn, drives the bevel gear 1 3, drive shaft 4 and bevel gear 2 5 to adjust their height, so that the drive shaft 4 is aligned with the driven shafts 111 on the left and right sides. The transmission shaft 13 of appropriate length is rotated according to the different distances between the drive shaft 4 and the driven shafts 111, and the transmission shaft 13 is connected between the drive shaft 4 and the driven shafts 111 through a coupling.

[0041] Therefore, by adjusting the height of the drive shaft 4 and selecting drive shafts 13 of different lengths for transmission connection, it can be directly installed at the bottom of the trailer, which is convenient for installation and support. At the same time, it can also be used for trailers with different height differences and different widths at the bottom, thus improving the adaptability of the landing gear.

[0042] After installation, when support is needed, the motor 15 is started, which drives the rotating shaft 6 to rotate, thereby driving the bevel gear 3 to rotate. During the rotation of the bevel gear 3, the two bevel gears 5 on both sides mesh with the bevel gear 3, which drives the drive shafts 4 on both sides to rotate, and then drives the driven shafts 111 on both sides to rotate through the transmission shaft 13.

[0043] When the driven shaft 111 rotates, the connecting shaft 112 is connected to the driven shaft 111 by a limiting sliding connection, which drives the bevel gear 114 to rotate. The bevel gear 115 meshes with the bevel gear 114, and during the rotation of the bevel gear 114, the lead screw 10 can be driven to rotate inside the support frame 8. When the lead screw 10 rotates, it is connected downward to the support column 9 by a thread, and the support column 9 is connected to the support frame 8 by a limiting sliding connection, which drives the support column 9 to move downward, thereby achieving support for the trailer at the bottom.

[0044] Furthermore, such as Figure 3 , Figures 6-9 As shown, the transmission assembly 11 also includes a magnetic ring 116. The magnetic ring 116 is fixedly installed on the side of the bevel gear 115 away from the lead screw 10, and an electromagnetic ring 117 is fixedly installed on the inner wall of the support frame 8 at the position opposite to the magnetic ring 116.

[0045] The transmission control assembly 12 includes a telescopic rod 121. The telescopic rod 121 is slidably connected to the bottom of the support column 9. A base 122 is fixedly installed at the bottom end of the telescopic rod 121. A limiting seat 123 is slidably connected to the top of the telescopic rod 121 inside the bottom of the support column 9. A spring 124 is fixedly connected between the bottom end of the limiting seat 123 and the top end of the telescopic rod 121. Tooth blocks 125 are evenly fixedly connected to the periphery of the limiting seat 123. A threaded sleeve 126 is rotatably connected to the bottom of the support column 9. The threaded sleeve 126 wraps around the outside of the limiting seat 123. The tooth blocks 125 extend outward, and the outer teeth of the tooth blocks 125 are threadedly connected to the inner side of the threaded sleeve 126. Therefore, by rotating the threaded sleeve 126, the tooth blocks 125 and the limiting seat 123 can be driven to move up and down.

[0046] When the base 122 is in the power supply state, when the top end face of the base 122 moves up to contact the bottom end face of the support column 9, the electromagnetic ring 117 can be energized. After the electromagnetic ring 117 is energized, the magnetic poles between the adjacent surfaces of the electromagnetic ring 117 and the magnetic ring 116 are opposite magnetic poles. Therefore, when the electromagnetic ring 117 is energized, it can attract the bevel gear 114 through the magnetic ring 116.

[0047] During the downward movement of the support column 9, the base 122 will first contact the ground. After the base 122 contacts the ground, under the action of the reaction force, the base 122 can drive the telescopic rod 121 to compress the second spring 124 relative to the support column 9 and move upward. When the top end face of the base 122 on one side contacts the bottom end face of the support column 9, it can energize the electromagnetic ring 117. After being energized, the electromagnetic ring 117 is pulled away from the bevel gear 114 and the connecting shaft 112 by mutual attraction with the magnetic ring 116. This causes the bevel gear 114 on that side to disengage from the bevel gear 115. Therefore, when the bevel gear 114 continues to rotate, it will not drive the bevel gear 115 to rotate. Consequently, the support column 9 will not continue to move downward by rotating the drive screw 10. This achieves stable stopping of the support column 9 after it moves downward and completes its support.

[0048] Meanwhile, the support column 9 on the other side will continue to move downward as driven by the motor 15 until the base 122 on that side also contacts the ground and adheres to the bottom end of the support column 9 under the action of the reaction force. This causes the bevel gear 3 114 on that side to disengage from the bevel gear 4 115, and the support column 9 stops stably and completes the support. This achieves stable support on uneven ground. Moreover, the support column 9 will stop stably after completing the support and does not require manual control. Only the motor 15 needs to be started, making the operation more convenient.

[0049] After the support is completed, the power supply to the electromagnetic ring 117 is stopped, so that the electromagnetic ring 117 no longer attracts the magnetic ring 116. The bevel gear 114 and the connecting shaft 112 will move back to the side closer to the bevel gear 115 under the action of the restoring force of the spring 113, so that the bevel gear 114 and the bevel gear 115 re-mesh. Therefore, after the trailer and the tractor are connected, the support columns 9 on both sides can be retracted upward by reversing the starter motor 15, so that the base 122 at the bottom end is separated from the ground, thus ensuring the normal movement of the trailer.

[0050] By connecting the threaded sleeve 126 at the bottom of the support column 9 to the inner toothed block 125, after the support column 9 moves down until the threaded sleeve 126 is exposed, the toothed block 125 and the limiting seat 123 can be moved up and down inside the support column 9 by rotating the threaded sleeve 126. During the up and down movement of the limiting seat 123, the magnitude of the force required for the base 122 and the compression spring 124 of the telescopic rod 121 to move upward and attach to the bottom end of the support column 9 can be changed. Therefore, the magnitude of the reaction force required for the base 122 to move upward and attach to the bottom end of the support column 9 after contacting the ground can be adjusted according to the different weights of the trailers to be supported. Thus, when facing soft ground, the base 122 will sink down after contacting the ground until sufficient supporting force is reached to attach the base 122 to the bottom end of the support column 9 before stopping the downward movement of the support column 9 to complete the support, thereby improving the stability of supporting trailers of different weights.

[0051] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A new energy semi-trailer landing gear, comprising a control frame (1), characterized in that, The control frame (1) is internally limited and slidably connected to a mounting block (2). The bottom of the inner side of the mounting block (2) is rotatably connected to a bevel gear (3). The left and right sides of the mounting block (2) are rotatably connected to a drive shaft (4). A bevel gear (5) is fixedly installed at each adjacent end of the drive shaft (4). A rotating shaft (6) is rotatably connected to the center of the control frame (1). Threaded rods (7) are threadedly connected to the left and right sides of the bottom of the control frame (1), and the top of the threaded rods (7) is rotatably connected to the bottom of the mounting block (2). The control frame (1) is symmetrically provided with support frames (8) on the left and right sides. The support frame (8) is internally limited and slidably connected with a support column (9). The support frame (8) is limited and rotatably connected with a lead screw (10) at the center of the top of the support frame (8). The lead screw (10) is threaded downward to the support column (9). A transmission assembly (11) is provided between the side wall of the support frame (8) and the lead screw (10). A transmission control assembly (12) is provided at the bottom of the support column (9). A transmission shaft (13) is connected between the drive shaft (4) and the transmission assembly (11). The second bevel gear (5) is located on the left and right sides of the top of the first bevel gear (3), and both mesh with the first bevel gear (3); The rotating shaft (6) passes through the mounting block (2) and the first bevel gear (3), and the first bevel gear (3) and the rotating shaft (6) are connected by upper and lower limit sliding connections.

2. The new energy semi-trailer landing gear according to claim 1, characterized in that, The control box (1) has symmetrical grooves (14) on its left and right sides, and the drive shaft (4) slides up and down inside the grooves (14).

3. The new energy semi-trailer landing gear according to claim 2, characterized in that, The transmission assembly (11) includes: Driven shaft (111), the adjacent sides of the top of the support frame (8) on both the left and right sides are limited to rotate connected by driven shaft (111). The connecting shaft (112) is located inside the support frame (8) and is slidably connected to the driven shaft (111). Spring 1 (113), the connecting shaft (112) is located inside the driven shaft (111) and the inner wall of the driven shaft (111) is fixedly connected to the spring 1 (113). A bevel gear three (114) is fixedly installed at the end of the connecting shaft (112) away from the driven shaft (111). A bevel gear four (115) is fixedly installed on the outer periphery of the top of the lead screw (10), and the bevel gear four (115) meshes with the bevel gear three (114); A magnetic ring (116) is fixedly installed on the side of the bevel gear four (115) away from the lead screw (10). An electromagnetic ring (117) is fixedly installed on the inner wall of the support frame (8) at a position where it is aligned with the magnetic ring (116).

4. The new energy semi-trailer landing gear according to claim 3, characterized in that, The two ends of the transmission shaft (13) are connected to the drive shaft (4) and the driven shaft (111) respectively by couplings.

5. The new energy semi-trailer landing gear according to claim 4, characterized in that, The transmission control assembly (12) includes: Telescopic rod (121), the support column (9) has an internal limit sliding connection to the telescopic rod (121); The base (122) is fixedly installed at the bottom end of the telescopic rod (121). The limiting seat (123) is slidably connected above the internal telescopic rod (121) at the bottom of the support column (9). Spring 2 (124) is fixedly connected between the bottom end of the limiting seat (123) and the top end of the telescopic rod (121). Tooth blocks (125) are uniformly fixedly connected to the periphery of the limiting seat (123); The threaded sleeve (126) is rotatably connected to the outer side of the bottom of the support column (9).

6. The new energy semi-trailer landing gear according to claim 5, characterized in that, The threaded sleeve (126) is wrapped around the outside of the limiting seat (123), the toothed block (125) extends outward, and the outer teeth of the toothed block (125) are all threadedly connected to the inner side of the threaded sleeve (126).

7. The new energy semi-trailer landing gear according to claim 6, characterized in that, When the base (122) moves up to the point where its top end face contacts the bottom end face of the support column (9), it can energize the electromagnetic ring (117), and the magnetic poles between the electromagnetic ring (117) and the adjacent surfaces of the magnetic ring (116) after the electromagnetic ring (117) is energized are opposite magnetic poles.

8. The new energy semi-trailer landing gear according to any one of claims 1-7, characterized in that, A motor (15) is fixedly installed at the bottom of the control frame (1), and the motor (15) is connected to the rotating shaft (6) for transmission.

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