Semitrailer rear wheel axle lifting device

Abstract

The application discloses a semi-trailer rear wheel axle lifting device, and relates to the technical field of semi-trailers, which comprises a lifting mechanism and an auxiliary mechanism, the auxiliary mechanism comprises a shell, a third circular pipe and a fourth circular pipe, two symmetrical auxiliary oil pumps are installed on the inner wall bottom of the shell, a storage box is installed on the top of the processing box, a first electric push rod is installed on the outer wall of the T-shaped plate, a second electric push rod is installed on the outer wall of the storage box, an adsorption layer is arranged in the interior of the porous hollow block, and electric valves are installed on the output end of the third circular pipe and the input end of the fourth circular pipe. Oxygen mixed in the hydraulic oil used in the lifting device can be removed through the auxiliary mechanism, the speed of deterioration of the hydraulic oil is reduced, the service life of the hydraulic oil is prolonged, the use effect of the lifting device is improved, and the use efficiency of the lifting device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of semi-trailers, in particular to a rear wheel axle lifting device for a semi-trailer. Background Art

[0002] A semitrailer is a trailer with its axle positioned behind the vehicle's center of gravity (when evenly loaded) and equipped with a hitch that transmits horizontal and vertical forces to the tractor. It is typically a three-axle semitrailer, and comes in a variety of types, including 11-meter slab semitrailers, 13-meter slab semitrailers, and low-bed semitrailers. It is a heavy-duty transport vehicle connected to the semitrailer's front end via a towing pin. Whether loaded or unloaded, the wheels on each axle are in contact with the ground, rolling forward due to friction with the road surface. This unloaded state is uneconomical, causing significant tire wear, high drag, and high operating costs. Therefore, to prevent excessive tire wear when the semitrailer is unloaded, a lifting device is typically used to lift the semitrailer's axles.

[0003] In actual use, the existing lifting device for the rear wheel axle of a semi-trailer can adjust the position of the axle according to whether the semi-trailer is in an unloaded state, so as to achieve stable driving of the semi-trailer when fully loaded and avoid tire wear when unloaded. However, it cannot perform anti-oxidation operations on the hydraulic oil used in the lifting device, thereby reducing the service life of the hydraulic oil, which may reduce the use effect of the lifting device, that is, reduce the use efficiency of the axle lifting device.

[0004] Therefore, it is necessary to propose a new semitrailer rear wheel axle pulling device, so as to solve the above-mentioned problem of raising. Summary of the Invention

[0005] The purpose of the present invention is to provide a semi-trailer rear wheel axle lifting device to solve the problem that the existing lifting device cannot perform anti-oxidation operations on the hydraulic oil used inside the lifting device, thereby reducing the use time of the hydraulic oil, that is, reducing the use effect of the lifting device, and thus reducing the use efficiency of the axle lifting device.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a semi-trailer rear wheel axle lifting device, comprising a lifting mechanism, wherein the lifting mechanism is provided with an auxiliary mechanism;

[0007] The auxiliary mechanism includes a shell, a third circular tube and a fourth circular tube, wherein two symmetrical auxiliary oil pumps are installed at the bottom of the inner wall of the shell, a processing box is installed at the bottom of the inner wall of the shell, a storage box is installed on the top of the processing box, and a top cover is installed on the top of the storage box, a T-shaped plate is movably penetrated on the upper side of the storage box, a first electric push rod is installed on the outer wall of the T-shaped plate, a guide hole is opened at the bottom of the inner wall of the storage box, a sealing column is provided inside the guide hole, and a second electric push rod is installed on the outer wall of the storage box, the front surface of the processing box is fixedly penetrated by the first circular tube near the top position, and the rear surface of the processing box is fixedly penetrated by the second circular tube near the bottom position, a porous hollow block is fixed inside the processing box, and an adsorption layer is provided inside the porous hollow block, the output ends of the two auxiliary oil pumps are both equipped with a first delivery pipe, the input ends of the two auxiliary oil pumps are both equipped with a second delivery pipe, and the output end of the third circular tube and the input end of the fourth circular tube are both equipped with an electric valve.

[0008] Preferably, the bottom of the T-shaped plate contacts the bottom of the inner wall of the processing box, and the two sides of the T-shaped plate respectively contact the two sides of the inner wall of the processing box. The bottom of the telescopic end of the first electric push rod and the top of the T-shaped plate are installed by a first screw, and the bottom of the sealing column moves through the upper side of the storage box, and the bottom of the telescopic end of the second electric push rod and the top of the sealing column are installed by a second screw.

[0009] Preferably, the top of the porous hollow block contacts the bottom of the storage box, the output end of one of the electric valves is installed with the input end of one of the second delivery pipes, and the input end of the other electric valve is installed with the output end of one of the first delivery pipes.

[0010] Preferably, the lifting mechanism includes a frame, the shell is fixed inside the frame, a top plate is fixed on the top of the frame, two groups of symmetrical cylinders are installed inside the shell, and the number of cylinders in each group is two, and the outer surface of each cylinder is movably connected to a stabilizing frame, and each stabilizing frame is installed at the bottom of the frame.

[0011] Preferably, a mounting block is fixed to the bottom of the telescopic end of each frame, and the four mounting blocks are divided into two groups. A bolt rod is movably passed through the same surface of each group of mounting blocks, and one end of each bolt rod is movably passed through the inner wall of each mounting block, and two anti-slip nuts are installed at one end of each bolt rod, and a leaf spring is arranged between the interiors of each group of mounting blocks.

[0012] Preferably, the four bolt rods are divided into two groups, each of the leaf springs is respectively located between the outer surfaces of each group of bolt rods, the outer surface of each leaf spring is provided with two U-shaped rings, the four U-shaped rings are divided into two groups, a pad is provided between the outer surfaces of each group of U-shaped rings, two limit blocks are fixed to the bottom of each pad, and a bottom plate is provided between the outer surfaces of each group of U-shaped rings.

[0013] Preferably, fixing nuts are installed at both ends of each U-shaped ring, and an axle body is arranged between the outer surfaces of the four limit blocks. The bottom of the axle body contacts the tops of the two base plates, and the top of the axle body contacts the bottoms of the two pads. Two U-shaped blocks are fixed inside the frame, and an oil pump body is installed at the bottom of the inner wall of one of the U-shaped blocks.

[0014] Preferably, an oil tank is installed at the bottom of the inner wall of the other U-shaped block, a sealing cover is installed on the top of the oil tank, the input end of the third round tube is fixedly penetrated through the front surface of the oil tank near the bottom, the output end of the fourth round tube is fixedly penetrated through the top of the sealing cover, an oil outlet pipe is fixedly penetrated through the top of the sealing cover, and an oil inlet pipe is fixedly penetrated through the front surface of the oil tank near the bottom.

[0015] Preferably, the output end of the oil inlet pipe is connected to the input end of the oil pump body through a first hose, a hydraulic control valve is installed on the rear surface of the oil tank, the output end of the oil pump body is connected to one of the upper ports of the hydraulic control valve through a second hose, the other upper port end of the hydraulic control valve is connected to the input end of the oil outlet pipe through a third hose, and the two lower ports of the hydraulic control valve are both installed with multi-way tubes.

[0016] Preferably, each port of one of the multi-way tubes is installed with a first oil pipe, and one end of each first oil pipe is respectively connected to the upper port of each oil cylinder, and each port of the other multi-way tube is installed with a second oil pipe, and one end of each second oil pipe is respectively connected to the lower port of each oil cylinder, and a controller is installed at the bottom of the top plate, and the oil pump body, hydraulic control valve, two auxiliary oil pumps, first electric push rod, second electric push rod and two electric valves are all electrically connected to the controller.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention can remove the oxygen mixed in the hydraulic oil used inside the lifting device by setting an auxiliary mechanism, that is, reduce the rate of deterioration of the hydraulic oil, thereby increasing the service life of the hydraulic oil, that is, improving the use effect of the lifting device, that is, improving the use efficiency of the lifting device. When the lifting device is needed, the control console, controller, second electric push rod, sealing column and diversion hole in the cab are first used to guide the powder in the storage box into the processing box.

[0019] 2. The present invention utilizes the cooperation of the control console, controller, auxiliary oil pump, first round pipe, second round pipe, electric valve, third round pipe, fourth round pipe, first delivery pipe, processing box and second delivery pipe in the cab to achieve sufficient mixing of hydraulic oil and powder. Then, under the action of the adsorption layer, water and carbon dioxide gas generated by the reaction of powder with oxygen in the hydraulic oil can be adsorbed and removed.

[0020] 3. The present invention provides a lifting mechanism, which allows the semi-trailer to adjust the position of the axle when it is empty or fully loaded, thereby effectively avoiding the problem of excessive tire wear when the semi-trailer is empty. When the semi-trailer is fully loaded, the mounting block can be moved up and down directly by utilizing the cooperation of the oil pump body, the first oil pipe, the second oil pipe, the first hose, the second hose, the third hose, the hydraulic control valve, the oil tank and the oil cylinder. Subsequently, the axle can be controlled to move up and down by cooperating with the mounting block, the bolt rod, the anti-slip nut, the leaf spring, the U-shaped ring, the pad, the limit block, the bottom plate and the fixing nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a perspective view of a semi-trailer rear wheel axle lifting device according to the present invention;

[0022] Figure 2 This is a partial perspective view from a top view of a semi-trailer rear wheel axle lifting device according to the present invention;

[0023] Figure 3 This is a partial perspective view of the auxiliary mechanism of a semi-trailer rear wheel axle lifting device according to the present invention;

[0024] Figure 4 This is a partially cutaway perspective view of an auxiliary mechanism of a semi-trailer rear wheel axle lifting device according to the present invention;

[0025] Figure 5 This is a partial perspective view of a semi-trailer rear wheel axle lifting device according to the present invention;

[0026] Figure 6 This is a partial perspective view from a bottom angle of a semi-trailer rear wheel axle lifting device according to the present invention;

[0027] Figure 7This is a bottom-up perspective view of a semi-trailer rear wheel axle lifting device according to the present invention;

[0028] Figure 8 This is a partial perspective view of a lifting mechanism of a semi-trailer rear wheel axle lifting device according to the present invention;

[0029] Figure 9 A partial perspective view from another angle of the lifting mechanism of the rear wheel axle lifting device for a semi-trailer according to the present invention;

[0030] Figure 10 The present invention is a schematic diagram of the three-dimensional structure of the oil cylinder, mounting block, bolt rod and anti-slip nut of a semi-trailer rear wheel axle lifting device.

[0031] In the figure: 1, lifting mechanism; 101, frame; 102, top plate; 103, oil cylinder; 104, stabilizer frame; 105, mounting block; 106, bolt rod; 107, anti-skid nut; 108, leaf spring; 109, U-shaped ring; 110, pad; 111, limit block; 112, bottom plate; 113, fixing nut; 114, axle body; 115, U-shaped block; 116, oil pump body; 117, sealing cover; 118, oil tank; 119, oil outlet pipe; 120, oil inlet pipe; 121, hydraulic control valve; 122, multi-way pipe; 123, first Oil pipe; 124, second oil pipe; 125, controller; 2, auxiliary mechanism; 201, housing; 202, auxiliary oil pump; 203, storage box; 204, top cover; 205, T-plate; 206, first electric push rod; 207, guide hole; 208, sealing column; 209, second electric push rod; 210, first circular tube; 211, second circular tube; 212, porous hollow block; 213, adsorption layer; 214, first delivery pipe; 215, second delivery pipe; 216, third circular tube; 217, fourth circular tube; 218, electric valve; 219, processing box. DETAILED DESCRIPTION

[0032] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0033] See also Figures 1-10 As shown, the present invention provides a technical solution: a semi-trailer rear wheel axle lifting device, comprising a lifting mechanism 1, on which an auxiliary mechanism 2 is provided;

[0034] The auxiliary mechanism 2 includes a shell 201, a third round tube 216 and a fourth round tube 217. Two symmetrical auxiliary oil pumps 202 are installed at the bottom of the inner wall of the shell 201. A processing box 219 is installed at the bottom of the inner wall of the shell 201. A storage box 203 is installed on the top of the processing box 219. A top cover 204 is installed on the top of the storage box 203. A T-shaped plate 205 is movably passed through the upper side of the storage box 203. A first electric push rod 206 is installed on the outer wall of the T-shaped plate 205. A guide hole 207 is opened at the bottom of the inner wall of the storage box 203. A sealing column 208 is provided inside the guide hole 207. The storage box 203 A second electric push rod 209 is installed on the outer wall of the processing box 219, a first circular tube 210 is fixedly passed through the front surface of the processing box 219 near the top position, and a second circular tube 211 is fixedly passed through the rear surface of the processing box 219 near the bottom position. A porous hollow block 212 is fixed inside the processing box 219, and an adsorption layer 213 is provided inside the porous hollow block 212. The output ends of the two auxiliary oil pumps 202 are both equipped with a first delivery pipe 214, the input ends of the two auxiliary oil pumps 202 are both equipped with a second delivery pipe 215, and the output end of the third circular tube 216 and the input end of the fourth circular tube 217 are both equipped with an electric valve 218.

[0035] according to Figure 2-Figure 4 As shown, the bottom of the T-shaped plate 205 contacts the bottom of the inner wall of the processing box 219, and the two sides of the T-shaped plate 205 contact the two sides of the inner wall of the processing box 219 respectively. The bottom of the telescopic end of the first electric push rod 206 is installed with the top of the T-shaped plate 205 by a first screw, and the bottom of the sealing column 208 is movable through the upper side of the storage box 203. The bottom of the telescopic end of the second electric push rod 209 is installed with the top of the sealing column 208 by a second screw, so that with the cooperation of the sealing column 208 and the second electric push rod 209, it is convenient to control whether the powder in the storage box 203 can enter the interior of the processing box 219 through the guide hole 207.

[0036] according to Figure 2-Figure 4 As shown, the top of the porous hollow block 212 is in contact with the bottom of the storage box 203, the output end of one electric valve 218 is installed with the input end of one of the second delivery pipes 215, and the input end of another electric valve 218 is installed with the output end of one of the first delivery pipes 214, so that under the action of the electric valve 218, it is convenient to control whether the third circular tube 216 and the fourth circular tube 217 can be connected with the corresponding second delivery pipe 215 and the first delivery pipe 214.

[0037] according to Figure 1 、 Figure 2 、 Figure 6-Figure 8 and Figure 10As shown, the lifting mechanism 1 includes a frame 101, a shell 201 fixed inside the frame 101, a top plate 102 fixed on the top of the frame 101, and two groups of symmetrical cylinders 103 are installed inside the shell 201, and the number of cylinders 103 in each group is two. The outer surface of each cylinder 103 is movably connected with a stabilizing frame 104, and each stabilizing frame 104 is installed at the bottom of the frame 101, so that under the action of the stabilizing frame 104, the cylinder 103 can be ensured to work stably.

[0038] according to Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 、 Figure 9 and Figure 10 As shown, a mounting block 105 is fixed to the bottom of the telescopic end of each frame 101, and the four mounting blocks 105 are divided into two groups. A bolt rod 106 is movably passed through the same surface of each group of mounting blocks 105, and one end of each bolt rod 106 is movably passed through the inner wall of each mounting block 105, and two anti-slip nuts 107 are installed at one end of each bolt rod 106. A steel leaf spring 108 is arranged between the inside of each group of mounting blocks 105, which can provide a buffering function for the entire lifting device under the action of the steel leaf spring 108.

[0039] according to Figure 1 、 Figure 6 、 Figure 7 、 Figure 9 and Figure 10 As shown, the four bolt rods 106 are divided into two groups, and each leaf spring 108 is respectively located between the outer surfaces of each group of bolt rods 106. Two U-shaped rings 109 are provided on the outer surface of each leaf spring 108. The four U-shaped rings 109 are divided into two groups, and a pad 110 is provided between the outer surfaces of each group of U-shaped rings 109. Two limit blocks 111 are fixed to the bottom of each pad 110. A bottom plate 112 is provided between the outer surfaces of each group of U-shaped rings 109, so that the axle body 114 can be tightly fixed with the cooperation of the bottom plate 112, U-shaped ring 109, pad 110, fixing nut 113 and limit block 111.

[0040] according to Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 and Figure 9As shown, fixing nuts 113 are installed at both ends of each U-shaped ring 109, and an axle body 114 is arranged between the outer surfaces of the four limit blocks 111. The bottom of the axle body 114 contacts the top of the two bottom plates 112, and the top of the axle body 114 contacts the bottom of the two pads 110. Two U-shaped blocks 115 are fixed inside the frame 101, and an oil pump body 116 is installed at the bottom of the inner wall of one of the U-shaped blocks 115, which can provide power support for the hydraulic oil delivery under the action of the oil pump body 116.

[0041] according to Figure 2 and Figure 5 As shown, an oil tank 118 is installed at the bottom of the inner wall of another U-shaped block 115, and a sealing cover 117 is installed on the top of the oil tank 118. The input end of the third circular tube 216 is fixedly penetrated through the front surface of the oil tank 118 near the bottom position, and the output end of the fourth circular tube 217 is fixedly penetrated through the top of the sealing cover 117. An oil outlet pipe 119 is fixedly penetrated through the top of the sealing cover 117, and an oil inlet pipe 120 is fixedly penetrated through the front surface of the oil tank 118 near the bottom position. With the cooperation of the oil inlet pipe 120, the first hose, the second hose and the oil pump body 116, the hydraulic oil can be delivered to the interior of the hydraulic control valve 121.

[0042] according to Figure 1 、 Figure 2 、 Figure 5 and Figure 8 As shown, the output end of the oil inlet pipe 120 is connected to the input end of the oil pump body 116 through a first hose, and a hydraulic control valve 121 is installed on the rear surface of the oil tank 118. The output end of the oil pump body 116 is connected to one of the upper ports of the hydraulic control valve 121 through a second hose, and the other upper port end of the hydraulic control valve 121 is connected to the input end of the oil outlet pipe 119 through a third hose. The two lower ports of the hydraulic control valve 121 are both installed with multi-way pipes 122, which facilitates the diversion of the hydraulic oil output by the hydraulic control valve 121 into the interior of each first oil pipe 123 under the action of the multi-way pipe 122, and at the same time, the hydraulic oil delivered from multiple first oil pipes 123 can be collected and diverted to the interior of the hydraulic control valve 121.

[0043] according to Figure 1-Figure 3 、 Figure 5-Figure 8 and Figure 10As shown, each port of one of the multi-way tubes 122 is installed with a first oil pipe 123, and one end of each first oil pipe 123 is respectively connected to the upper port of each oil cylinder 103, and each port of the other multi-way tube 122 is installed with a second oil pipe 124, and one end of each second oil pipe 124 is respectively connected to the lower port of each oil cylinder 103, and a controller 125 is installed at the bottom of the top plate 102, and the oil pump body 116, the hydraulic control valve 121, the two auxiliary oil pumps 202, the first electric push rod 206, the second electric push rod 209 and the two electric valves 218 are all electrically connected to the controller 125, so that under the action of the controller 125, it is convenient to control whether the components electrically connected to the controller 125 are opened and closed.

[0044] The effect achieved by the entire mechanism is as follows: when the semi-trailer is fully loaded, the controller 125 is first connected to the control console in the cab of the semi-trailer with a wire, and then the top cover 204 is opened, and then an appropriate amount of di-tert-butyl-p-cresol powder is injected into the interior of the storage box 203, and then the top cover 204 is installed back to the initial position, and then the driver in the cab uses the cooperation of the control console and the controller 125 to start the first electric push rod 206 and the second electric push rod 209. At this time, the started first electric push rod 206 will directly drive the bottom of the T-plate 205 to leave the bottom of the inner wall of the processing box 219, and the started second electric push rod 209 will directly drive the bottom end of the sealing column 208 to leave the interior of the guide hole 207. When the T-plate 205 and the sealing column When both 208 are moved to the point where they cannot move, the controller 125 will directly close the first electric push rod 206 and the second electric push rod 209. At this time, the bottom of the T-plate 205 is just at the same level as the bottom of the storage box 203. When the bottom end of the sealing column 208 moves out of the guide hole 207, the powder inside the storage box 203 will directly flow into the guide hole 207, and then move from the outlet of the guide hole 207 to the inside of the processing box 219. When all the powder in the storage box 203 is moved to the inside of the processing box 219, at this time, with the cooperation of the controller 125 and the console in the cab, the second electric push rod 209 is used again to move the sealing column 208 back to the initial position. When the sealing column 208 moves back to the initial position , close the second electric push rod 209 again, and then let the driver in the cab use the cooperation of the console and the controller 125 to open the two electric valves 218 and synchronously start the two auxiliary oil pumps 202. At this time, the auxiliary oil pump 202 close to the first circular pipe 210 will directly extract the hydraulic oil in the oil tank 118 through the cooperation of the second delivery pipe 215, the corresponding electric valve 218 and the third circular pipe 216 connected thereto, and then directly deliver the hydraulic oil to the processing box 219 through the corresponding first delivery pipe 214 and the first circular pipe 210. When the hydraulic oil enters the processing box 219, the hydraulic oil will first pass through the porous hollow block 212 and the adsorption layer 213, and then contact and mix with the powder. At this time, the auxiliary oil pump 202 started near the second circular pipe 211 will directly transport the hydraulic oil mixed with powder back to the interior of the oil tank 118 under the cooperation of the second circular pipe 211, the corresponding second delivery pipe 215, the first delivery pipe 214, the electric valve 218 and the fourth circular pipe 217. When the hydraulic oil is completely mixed with the powder, the powder will react with the oxygen mixed in the hydraulic oil to generate carbon dioxide gas and water. At this time, the mixture of hydraulic oil, powder, water and carbon dioxide gas will be pumped out of the oil tank 118 again. When the hydraulic oil, powder, water and carbon dioxide gas come into contact with the adsorption layer 213, the adsorption layer 213 will directly adsorb and remove the water and carbon dioxide gas. When the oxygen in the hydraulic oil is removed by the reaction,At this time, the driver in the cab uses the control console and the controller 125 to close the electric valve 218 connected to the third circular tube 216 and the auxiliary oil pump 202 near the first circular tube 210. When the processed hydraulic oil in the processing box 219 is almost completely diverted back to the oil tank 118, the driver in the cab uses the control console and the controller 125 to close the electric valve 218 connected to the fourth circular tube 217 and the auxiliary oil pump 202 near the second circular tube 211. This can effectively prevent the substances in the hydraulic oil from reacting with oxygen, causing the hydraulic oil to deteriorate, resulting in an increase in the viscosity of the hydraulic oil, and affecting the use effect of the pulling device. Then, the wheels can be installed at both ends of the axle body 114. When When everything is ready, the driver in the cab can use the cooperation of the console and the controller 125 to start the oil pump body 116. At this time, the started oil pump body 116 will directly cooperate with the first hose and the oil inlet pipe 120 to extract the hydraulic oil in the oil tank 118, and then with the cooperation of the second hose, directly guide the treated hydraulic oil to the hydraulic control valve 121. When the hydraulic oil reaches the inside of the hydraulic control valve 121, under the action of the hydraulic control valve 121, the hydraulic oil is directly guided to the multi-way pipe 122 connected to the first oil pipe 123. Then, the hydraulic oil entering the multi-way pipe 122 will be directly diverted and introduced into the interior of each first oil pipe 123. When the hydraulic oil enters the interior of each oil cylinder 103, the oil Each telescopic end of the cylinder 103 will start to move from the inside to the outside. When all four oil cylinders 103 are started, the four oil cylinders 103 started at this time will directly drive the two leaf springs 108 to move synchronously with the cooperation of the mounting block 105, the bolt rod 106 and the anti-skid nut 107. The two moving leaf springs 108 will directly drive the axle body 114 to move with the cooperation of the U-shaped ring 109, the pad 110, the limit block 111, the bottom plate 112 and the fixing nut 113. When the surface of the tire on the axle body 114 contacts the ground, the driver can directly use the cooperation of the console and the controller 125 to close the oil pump body 116. At this time, with the cooperation of the axle body 114 and the wheel, the semi-trailer can be guaranteed to move. The vehicle performs stable moving operations. When the semi-trailer is not loaded and needs to be empty, the driver can directly use the cooperation of the console and the controller 125 to adjust the hydraulic oil flow direction of the hydraulic control valve 121 and start the oil pump body 116 at the same time. The started oil pump body 116 will directly guide the extracted hydraulic oil to the multi-way pipe 122 connected to the second oil pipe 124. When the hydraulic oil enters from the lower port of the oil cylinder 103, the telescopic end of each oil cylinder 103 will move back to the inside of the corresponding oil cylinder 103. When the telescopic end of each oil cylinder 103 begins to move back, the leaf spring 108 will also move accordingly, and the moving leaf spring 108 will drive the wheels on the axle body 114 to move. At the same time,The hydraulic oil previously injected into the upper port of each cylinder 103 is directly squeezed out and transported to the first oil pipe 123 connected to it. It is then collected into the corresponding multi-way pipe 122 and then enters the hydraulic control valve 121. After that, with the cooperation of the third hose and the oil outlet pipe 119, it is directly guided back to the interior of the oil tank 118. When the telescopic end of the cylinder 103 is completely returned to the interior of the corresponding cylinder 103, the controller 125 will directly shut off the oil pump body 116.

[0045] Among them, the oil cylinder 103, the leaf spring 108, the axle body 114, the oil pump body 116, the hydraulic control valve 121, the controller 125 (PLC controller), the auxiliary oil pump 202, the first electric push rod 206, the second electric push rod 209, the adsorption layer 213 (composed of multiple 13X molecular sieve particles) and the electric valve 218 are all existing technologies and will not be explained in detail here.

[0046] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A semi-trailer rear wheel axle lifting device, characterized by: It comprises a lifting mechanism (1), wherein the lifting mechanism (1) is provided with an auxiliary mechanism (2); The auxiliary mechanism (2) comprises a shell (201), a third circular tube (216) and a fourth circular tube (217); two symmetrical auxiliary oil pumps (202) are installed at the bottom of the inner wall of the shell (201); a processing box (219) is installed at the bottom of the inner wall of the shell (201); a storage box (203) is installed on the top of the processing box (219); a top cover (204) is installed on the top of the storage box (203); a T-shaped plate (205) is movably passed through the upper side of the storage box (203); a first electric push rod (206) is installed on the outer wall of the T-shaped plate (205); a guide hole (207) is opened at the bottom of the inner wall of the storage box (203); a sealing column (208) is provided inside the guide hole (207); A second electric push rod (209) is installed on the outer wall of the storage box (203); a first circular tube (210) is fixedly passed through the front surface of the processing box (219) near the top position; a second circular tube (211) is fixedly passed through the rear surface of the processing box (219) near the bottom position; a porous hollow block (212) is fixed inside the processing box (219); an adsorption layer (213) is provided inside the porous hollow block (212); a first delivery pipe (214) is installed at the output end of the two auxiliary oil pumps (202); a second delivery pipe (215) is installed at the input end of the two auxiliary oil pumps (202); and an electric valve (218) is installed at the output end of the third circular tube (216) and the input end of the fourth circular tube (217).

2. The semi-trailer rear wheel axle lifting device according to claim 1, characterized in that: The bottom of the T-shaped plate (205) contacts the bottom of the inner wall of the processing box (219), and the two sides of the T-shaped plate (205) respectively contact the two sides of the inner wall of the processing box (219). The bottom of the telescopic end of the first electric push rod (206) is installed with the top of the T-shaped plate (205) through a first screw. The bottom of the sealing column (208) is movable through the upper side of the storage box (203). The bottom of the telescopic end of the second electric push rod (209) is installed with the top of the sealing column (208) through a second screw.

3. The rear wheel axle lifting device for a semitrailer according to claim 1, characterized in that: The top of the porous hollow block (212) contacts the bottom of the storage box (203), the output end of one of the electric valves (218) is installed with the input end of one of the second delivery pipes (215), and the input end of the other electric valve (218) is installed with the output end of one of the first delivery pipes (214).

4. The semi-trailer rear wheel axle lifting device according to claim 1, characterized in that: The lifting mechanism (1) includes a frame (101), the shell (201) is fixed inside the frame (101), a top plate (102) is fixed on the top of the frame (101), two groups of symmetrical oil cylinders (103) are installed inside the shell (201), and the number of oil cylinders (103) in each group is two, and the outer surface of each oil cylinder (103) is movably connected to a stabilizing frame (104), and each stabilizing frame (104) is installed at the bottom of the frame (101).

5. The semi-trailer rear wheel axle lifting device according to claim 4, characterized in that: A mounting block (105) is fixed to the bottom of the telescopic end of each frame (101), and the four mounting blocks (105) are divided into two groups. A bolt rod (106) is movably passed through the same surface of each group of mounting blocks (105), and one end of each bolt rod (106) is movably passed through the inner wall of each mounting block (105). Two anti-slip nuts (107) are installed at one end of each bolt rod (106), and a steel leaf spring (108) is arranged between the interiors of each group of mounting blocks (105).

6. The semi-trailer rear wheel axle lifting device according to claim 5, characterized in that: The four bolt rods (106) are divided into two groups, each of the leaf springs (108) is located between the outer surfaces of each group of bolt rods (106), and the outer surface of each leaf spring (108) is provided with two U-shaped rings (109). The four U-shaped rings (109) are divided into two groups, and a pad (110) is provided between the outer surfaces of each group of U-shaped rings (109). Two limit blocks (111) are fixed to the bottom of each pad (110), and a bottom plate (112) is provided between the outer surfaces of each group of U-shaped rings (109).

7. The semi-trailer rear wheel axle lifting device according to claim 6, characterized in that: Both ends of each U-shaped ring (109) are installed with a fixing nut (113), and an axle body (114) is provided between the outer surfaces of the four limit blocks (111). The bottom of the axle body (114) contacts the tops of the two bottom plates (112), and the top of the axle body (114) contacts the bottoms of the two pads (110). Two U-shaped blocks (115) are fixed inside the frame (101), and an oil pump body (116) is installed at the bottom of the inner wall of one of the U-shaped blocks (115).

8. The semi-trailer rear wheel axle lifting device according to claim 7, characterized in that: An oil tank (118) is installed at the bottom of the inner wall of the other U-shaped block (115), a sealing cover (117) is installed at the top of the oil tank (118), the input end of the third circular tube (216) is fixedly penetrated through the front surface of the oil tank (118) near the bottom, the output end of the fourth circular tube (217) is fixedly penetrated through the top of the sealing cover (117), an oil outlet pipe (119) is fixedly penetrated through the top of the sealing cover (117), and an oil inlet pipe (120) is fixedly penetrated through the front surface of the oil tank (118) near the bottom.

9. The semi-trailer rear wheel axle lifting device according to claim 8, characterized in that: The output end of the oil inlet pipe (120) is connected to the input end of the oil pump body (116) via a first hose. A hydraulic control valve (121) is installed on the rear surface of the oil tank (118). The output end of the oil pump body (116) is connected to one of the upper ports of the hydraulic control valve (121) via a second hose. The other upper port of the hydraulic control valve (121) is connected to the input end of the oil outlet pipe (119) via a third hose. Both lower ports of the hydraulic control valve (121) are installed with multi-way pipes (122).

10. The semi-trailer rear wheel axle lifting device according to claim 9, characterized in that: Each port of one of the multi-way tubes (122) is installed with a first oil pipe (123), and one end of each first oil pipe (123) is respectively connected to the upper port of each oil cylinder (103); each port of the other multi-way tube (122) is installed with a second oil pipe (124), and one end of each second oil pipe (124) is respectively connected to the lower port of each oil cylinder (103); a controller (125) is installed at the bottom of the top plate (102); the oil pump body (116), the hydraulic control valve (121), the two auxiliary oil pumps (202), the first electric push rod (206), the second electric push rod (209) and the two electric valves (218) are all electrically connected to the controller (125).

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