Telescopic chassis capable of automatically controlling lifting

Abstract

The invention relates to the technical field of chassis structures, and discloses an automatic lifting control telescopic chassis which comprises a base frame, traveling assemblies are assembled on the left side and the right side of the base frame, a bottom plate located on the inner sides of the traveling assemblies is arranged below the base frame, and lifting assemblies capable of driving the bottom plate to ascend and descend are assembled on a front longitudinal beam and a rear longitudinal beam of the base frame. Transverse beams of the base frame are provided with transmission assemblies used for transmitting the front lifting assembly and the rear lifting assembly to operate and driving parts, bearing seats are further installed on the left transverse beam and the right transverse beam of the base frame, retractable cleaning assemblies capable of sliding along the surface of the bottom plate are assembled at the bottoms of the bearing seats, and oil supply assemblies are further assembled on front longitudinal beams and rear longitudinal beams of the base frame. The front scraping plate and the rear scraping plate can slide back to back along the bottom wall of the bottom plate from inside to outside, the scraping plates moving between the front scraping plate and the rear scraping plate can scrape dirt attached to the bottom face of the bottom plate through cutter grooves in the side walls of the scraping plates, and in the lifting stage of the bottom plate, a piston pipe gradually condenses into an oil collecting pipe, oil is discharged, adsorbed by a wiping layer and coated on the cleaned bottom wall of the bottom plate. And cleaning and maintenance are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of chassis structures, and more particularly to a telescopic chassis with automatic lifting control. Background Art

[0002] A lifting and telescopic crawler chassis is a crawler chassis with a lifting function. This chassis realizes the adjustment of the chassis height through specific mechanical structures, such as a lifting mechanism. The lifting function enables the chassis to adjust the ground clearance according to actual needs to adapt to different terrains and working environments, such as complex road conditions in swamps, river beaches, deserts, paddy fields, etc. Structurally, a lifting and telescopic crawler chassis usually includes a chassis frame, a walking beam, a lifting mechanism, etc. The lifting mechanism lowers or raises the chassis frame by controlling the contraction or elongation of the piston rod of the hydraulic cylinder. For example, the Chinese invention patent with the publication number CN117842223A discloses a crawler chassis suspension lifting mechanism, including a chassis, a driving component, and a lifting component. The driving component is arranged on the chassis and is used to drive the chassis to drive the vehicle body to move; the lifting component is arranged on the chassis and is used to adjust the height of the chassis.

[0003] However, during the operation of the equipment, the chassis is prone to adhesion of dirt, such as sludge, etc. These dirt will corrode the chassis structure and firmly adhere to the surface of the chassis after drying, resulting in a reduction in the effective height distance from the ground of the chassis, which is likely to cause scratches and is not conducive to the long-term use of the chassis.

[0004] Therefore, the present invention proposes a telescopic chassis with automatic lifting control, so that when the chassis is adjusted in height, self-cleaning and maintenance can be realized, and the service life can be extended. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a telescopic chassis with automatic lifting control to solve the problem of how to realize the self-cleaning and maintenance of the chassis and extend its service life as described in the above background art.

[0006] The present invention provides the following technical solution: A telescopic chassis with automatic lifting control includes a base frame. Traveling components are assembled on the left and right sides of the base frame. A bottom plate is arranged below the base frame and inside the traveling components. Lifting components for driving the bottom plate to lift are assembled on the front and rear longitudinal beams of the base frame. A transmission component and a driving part for driving the operation of the front and rear two groups of lifting components are arranged on the cross beam of the base frame. Bearing seats are also installed on the left and right cross beams of the base frame. A retractable cleaning component capable of sliding along the surface of the bottom plate is assembled at the bottom of the bearing seat. An oil supply component is also assembled on the front and rear longitudinal beams of the base frame. The retractable cleaning component includes a swing rod, a scraper, a shaft head tube and a shaft seat. The shaft seat is installed at the bottom of the bearing seat. The scraper is slidably arranged at the bottom of the bottom plate. Shaft head tubes are assembled at the left and right ends of the scraper. The top and bottom ends of the swing rod are respectively rotatably connected to the shaft seat and the shaft head tube; The oil supply component includes an assembly seat, a collecting oil pipe, a piston pipe, a drain valve, a liquid inlet valve and an oil delivery pipe. The bottom end of the collecting oil pipe is installed in the oil reserve chamber of the assembly seat. The piston pipe is telescopically inserted into the collecting oil pipe. A drain valve is assembled at the top end of the piston pipe. The bottom end of the piston pipe is fixedly connected to the bottom plate. A liquid inlet valve is assembled at the top end of the collecting oil pipe. The liquid inlet valve is connected to the fuel tank. One end of the oil delivery pipe is connected to the bottom end of the piston pipe, and the other end is connected to the shaft head tube.

[0007] Further, knife grooves are provided on the front and rear side walls of the swing rod. A transition cavity is provided at the bottom of the swing rod. An oil passage communicating with the transition cavity is arranged in the middle of the swing rod. The top end of the oil passage is connected to a wiping layer. The wiping layer can be pressed to be flush with the scraper. The scraper is attached to the bottom wall of the bottom plate. The buckle at the end of the scraper is slidably arranged in the chute on the side wall of the bottom plate.

[0008] Further, the lifting component includes a toothed plate, a flat gear, a first transmission shaft and a limit seat. The toothed plate is slidably arranged in the front side slot of the limit seat. The limit seat is installed on the longitudinal beam. The flat gear arranged outside the limit seat meshes with the toothed plate. One end of the first transmission shaft is rotatably arranged on the vertical frame, and the other end is fixedly sleeved with the flat gear.

[0009] Further, the transmission component includes a second transmission shaft and bevel gears. The second transmission shaft is rotatably arranged on the top of the bearing seat. Two groups of bevel gears are respectively arranged at both ends of the second transmission shaft. Each group of bevel gears contains two bevel gears that are vertically meshed. The two bevel gears are respectively assembled on the second transmission shaft and the end of the first transmission shaft close to it.

[0010] Further, the base frame is welded by two groups of front and rear longitudinal beams and two groups of left and right cross beams. It is made of metal material. Vertical frames are installed at the ends of the left and right cross beams.

[0011] Further, the traveling component includes a suspension, a belt pulley and a crawler. The suspension is welded to the bottom of the vertical frame. Rotating shafts are respectively rotatably arranged on the inner sides of the two groups of front and rear suspensions. Belt pulleys are assembled at the ends of the rotating shafts. The two belt pulleys on the same side (either the left side or the right side) are driven by a crawler. A driving part can be assembled around the rotating shaft on either side.

[0012] Further, an impeller is arranged in the oil reserve chamber in the assembly seat. The impeller is assembled at the end of the first transmission shaft, so that the first transmission shaft can drive the impeller to rotate coaxially to mix the oil in the oil reserve chamber. A heating device can be arranged in the oil reserve chamber to increase the molecular activity. Through holes are provided on the side wall of the collecting oil pipe located in the oil reserve liquid chamber.

[0013] Furthermore, the top of the bottom plate is an assembly tray for loading vehicle body parts.

[0014] Technical effects and advantages of the present invention: The present invention cooperates with the bottom plate, the lifting assembly, the retractable cleaning assembly and the oil supply assembly to facilitate the front and rear two sets of first transmission shafts and the plane gears to rotate in opposite directions from inside to outside, and the outwardly rotating plane gears can transmit the tooth plate upward, so that the tooth plate can pull the bottom plate up to adjust the height of the bottom plate from the ground. During the bottom plate lifting stage, the two swing rods gathered in the middle of the base frame are squeezed by the continuous lifting of the bottom plate, and then the swing rods are spread to both sides with the shaft seat as the axis, that is, the two swing rods on the same side can push the two scrapers outward through the shaft head tubes rotatably arranged at their bottom ends, so that the front and rear scrapers can slide back to back from inside to outside along the bottom wall of the bottom plate, and the scrapers moving in the meantime can rely on their side The knife grooves on the wall can scrape off the dirt adhered to the bottom surface of the base plate, thereby cleaning the surface of the base plate; at the same time, the base plate can move upward with the piston tube during the lifting stage, so that the piston tube gradually shrinks into the oil collecting pipe, thereby increasing the hydraulic pressure in the oil collecting pipe. The anti-rust oil in the oil collecting pipe can be discharged from the drain valve and introduced into the scraper through the piston tube, the oil pipe and the shaft head pipe, and then flows to the wiping layer through the transition chamber and the oil channel, and is adsorbed by the wiping layer and coated on the bottom wall of the cleaned base plate to form an oil film layer, so as to improve its oxidation resistance and realize the oiling protection operation on the surface of the base plate. Through the above cooperation, self-cleaning and maintenance can be achieved when the chassis is adjusted in height, thereby extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 For the present invention Figure 1 Schematic diagram of the remaining structure after removing one side of the track.

[0017] Figure 3 For the present invention Figure 2 Schematic diagram of the remaining structure after removing the pulleys and tracks.

[0018] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at point A in the middle.

[0019] Figure 5 For the present invention Figure 3 Schematic diagram of the structure at point B in the middle.

[0020] Figure 6 It is a schematic diagram of the connection structure of the base frame, bottom plate, bearing seat, retractable cleaning assembly and oil supply assembly of the present invention.

[0021] Figure 7 For the present inventionFigure 6 Schematic diagram of the structure at position C in the [device].

[0022] Figure 8 Schematic diagram of the connection structure between the bottom plate and the retractable cleaning assembly of the present invention.

[0023] Figure 9 of the present invention Figure 8 Schematic diagram of the structure at position D in the [device].

[0024] Figure 10 Schematic cross-sectional structure diagram of the scraper of the present invention.

[0025] Reference numerals are: 1, base frame; 2, traveling assembly; 201, suspension; 202, belt pulley; 203, crawler belt; 3, bottom plate; 4, lifting assembly; 401, toothed plate; 402, spur gear; 403, first transmission shaft; 404, limit seat; 5, transmission assembly; 501, second transmission shaft; 502, bevel gear; 6, bearing seat; 7, retractable cleaning assembly; 701, swing rod; 702, scraper; 7021, transition cavity; 7022, oil passage; 7023, wiping layer; 7024, tool groove; 703, shaft head tube; 704, shaft seat; 8, oil supply assembly; 801, mounting seat; 802, oil collecting pipe; 803, piston tube; 804, drain valve; 805, inlet valve; 806, impeller; 807, oil delivery pipe; 9, drive part; 901, reversible motor; 902, housing; 903, worm; 904, drive gear; 905, driven gear; 10, vertical frame. Detailed implementation manners

[0026] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. In addition, the forms of each structure described in the following embodiments are merely examples, and an automatically controlled lifting telescopic chassis related to the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0027] Referring to Figures 1-10 , the present invention provides an automatically controlled lifting telescopic chassis, including a base frame 1, traveling assemblies 2 symmetrically distributed and assembled on the left and right sides of the base frame 1, a bottom plate 3 located inside the traveling assemblies 2 is arranged below the base frame 1, a lifting assembly 4 capable of driving the bottom plate 3 to lift is assembled on the front and rear longitudinal beams of the base frame 1, a transmission assembly 5 and a drive part 9 for driving the front and rear two groups of lifting assemblies 4 to operate are arranged on the cross beam on the left or right side of the base frame 1, bearing seats 6 are further installed on the left and right cross beams of the base frame 1, a retractable cleaning assembly 7 symmetrically distributed and capable of sliding along the surface of the bottom plate 3 is assembled at the bottom of the bearing seats 6, an oil supply assembly 8 is further assembled on the front and rear longitudinal beams of the base frame 1, and the telescopically adjustable bottom plate 3 can carry the oil supply assembly 8 for telescopic movement.

[0028] In this embodiment, it should be specifically explained that the base frame 1 is welded by two sets of front and rear longitudinal beams and two sets of left and right cross beams, and is made of metal material, which can be steel, aluminum or carbon fiber, to provide a firm support and stability for the vehicle body; The ends of the left and right cross beams are installed with a stand 10, and the traveling assembly 2 includes a suspension 201, a pulley 202 and a crawler 203, wherein the suspension 201 is welded to the bottom of the stand 10, and the inner sides of the front and rear suspensions 201 are respectively provided with rotating shafts, and the ends of the rotating shafts are assembled with pulleys 202, and the two pulleys 202 on the left and the right are connected by the crawler 203, wherein a driving part 9 can be installed around the rotating shaft on either side, so that the driven gear 905 is fixedly sleeved on the surface of the rotating shaft to provide driving force for the equipment to move forward; The driving part 9 includes a reversible motor 901, a housing 902, a worm 903, a driving gear 904 and a driven gear 905, wherein the output shaft of the reversible motor 901 is equipped with a worm 903, the driving gear 904 is located beside the worm 903 and meshes with it, and the driving gear 904 is meshed with the driven gear 905 pointed to by the end of the worm 903, and the worm 903, the driving gear 904 and the driven gear 905 are located in the housing 902 at the front of the reversible motor 901, and the housing 902 is installed on the bearing seat 6. The output shaft of the reversible motor 901 drives the worm 903 to rotate, and then the rotating worm 903 transmits the torque force to the driving gear 904 and the driven gear 905 meshed with it, so that the driven gear 905 can carry the second transmission shaft 501 and the bevel gears 502 at both ends to rotate coaxially, and the transmission direction of the transmission assembly 5 can be changed by switching the output direction of the reversible motor 901; In this article, all the positional relationships we discuss about front, back, left, and right are based on Figures 1-3 The directions are defined by the perspective presented. These directions do not have actual geographical or physical meaning. They are just a reference frame set to help readers understand the content of the article more intuitively. In this way, we can show the relative position relationship between the various parts more clearly, making the entire discussion process easier to understand and follow. Please note that this custom direction mark is only for internal use in this article and does not represent any absolute direction or position in the real world. The top of the bottom plate 3 is an assembly tray for loading other vehicle body parts.

[0029] Reference Figures 2-3The lifting assembly 4 includes a toothed plate 401, a flat gear 402, a first transmission shaft 403 and a limit seat 404, wherein the toothed plate 401 is slidably disposed in a front slot of the limit seat 404, the limit seat 404 is mounted on the longitudinal beam, and the flat gear 402 disposed on the outer side of the limit seat 404 can mesh with the toothed plate 401, one end of the first transmission shaft 403 is rotatably disposed on the stand 10, and the other end thereof is fixedly sleeved with the flat gear 402, and the front and rear two groups of first transmission shafts 403 and flat gears 402 can rotate counterclockwise or clockwise, and the rotating flat gear 402 can transmit the toothed plate 401 meshed therewith upward or downward, so that the toothed plate 401 can smoothly lift or lower the bottom plate 3 to adjust the height of the bottom plate 3 from the ground; The transmission assembly 5 includes a second transmission shaft 501 and a bevel gear 502, wherein the second transmission shaft 501 is rotatably set on the top of the supporting seat 6, and two groups of bevel gears 502 are respectively set at both ends of the second transmission shaft 501, each group of bevel gears 502 contains two bevel gears 502 that are vertically meshed, and the two bevel gears 502 are respectively assembled on the second transmission shaft 501 and the end of the first transmission shaft 403 adjacent thereto. The transmission direction of the transmission assembly 5 can be changed by switching the output direction of the reversible motor 901, and the driven gear 905 can carry the second transmission shaft 501 to rotate counterclockwise or clockwise, and transmit the torque force to the front and rear first transmission shafts 403 through the two groups of bevel gears 502 that are vertically meshed at its ends.

[0030] Reference Figures 4-10 The retractable cleaning assembly 7 includes a swing rod 701, a scraper 702, an axle head tube 703 and an axle seat 704, wherein the axle seat 704 is installed at the bottom of the bearing seat 6, the scraper 702 is slidably arranged at the bottom of the bottom plate 3, the left and right ends of the scraper 702 are equipped with an axle head tube 703, the top and bottom ends of the swing rod 701 are respectively rotatably connected with the axle seat 704 and the axle head tube 703, and in the lifting stage of the bottom plate 3, the two swing rods 701 gathered in the middle of the base frame 1 Under the extrusion force of the continuously lifted bottom plate 3, the swing rod 701 is then stretched to both sides with the shaft seat 704 as the axis, that is, the two swing rods 701 on the same side can push the two scrapers 702 outward through the shaft head tubes 703 rotatably arranged at their bottom ends, and conversely, the two swing rods 701 on the same side are pulled downward by the bottom plate 3, so that the swing rods 701 converge toward the middle with the shaft seat 704 as the axis, and the front and rear scrapers 702 can move closer from the outside to the inside along the bottom wall of the bottom plate 3; The oil supply assembly 8 includes an assembly seat 801, a manifold 802, a piston tube 803, a drain valve 804, a liquid inlet valve 805, and an oil pipe 807. The bottom end of the manifold 802 is installed in the oil reserve cavity of the assembly seat 801. The piston tube 803 is telescopically inserted into the manifold 802. A drain valve 804 is assembled at the top end of the piston tube 803. The bottom end of the piston tube 803 is fixedly connected to the bottom plate 3. A liquid inlet valve 805 is assembled at the top end of the manifold 802. The liquid inlet valve 805 is connected to the fuel tank. One end of the oil pipe 807 is connected to the bottom end of the piston tube 803, and the other end is connected to the shaft head tube 703. During the lifting stage, the bottom plate 3 can carry the piston tube 803 and move upward together, causing the piston tube 803 to gradually contract into the inner cavity of the manifold 802, prompting the hydraulic pressure in the manifold 802 to increase. The anti-rust oil in the manifold 802 can be discharged through the drain valve 804 and introduced into the scraper 702 through the piston tube 803, the oil pipe 807, and the shaft head tube 703. Conversely, the piston tube 803 gradually withdraws from the inner cavity of the manifold 802, causing the hydraulic pressure in the manifold 802 to decrease. The manifold 802 can extract the anti-rust oil stored in the fuel tank through the liquid inlet valve 805 to achieve automatic oiling operation.

[0031] In this embodiment, it should be specifically noted that knife grooves 7024 are provided on the front and rear side walls of the swing rod 701, a transition cavity 7021 is provided at the bottom of the swing rod 701, an oil passage 7022 communicating with the transition cavity 7021 is arranged in the middle thereof, the top end of the oil passage 7022 is connected to a wiping layer 7023, and the wiping layer 7023 can be flush with the scraper 702 under pressure. The scraper 702 is attached to the bottom wall of the bottom plate 3, and the buckle at the end of the scraper 702 is slidably arranged in the chute on the side wall of the bottom plate 3. On the one hand, the moving scraper 702 can scrape the dirt on the bottom surface of the bottom plate 3 with the knife grooves 7024 on its side wall. On the other hand, the oil flows through the transition cavity 7021 and the oil passage 7022 to the wiping layer 7023, is adsorbed by the wiping layer 7023 and coated on the bottom wall of the cleaned bottom plate 3 to form an oil film layer to improve its oxidation resistance. An impeller 806 is arranged in the oil reserve cavity of the assembly seat 801. The impeller 806 is assembled at the end of the first transmission shaft 403, enabling the first transmission shaft 403 to drive the impeller 806 to rotate coaxially and mix the oil in the oil reserve cavity. A heating device can be arranged in the oil reserve cavity to increase the molecular activity. Through holes are provided on the side wall of the manifold 802 located in the oil reserve cavity, so that when the fuel tank is short of oil, the oil in the reserve cavity can be injected into the manifold 802 through the through holes under the action of the pressure difference on both sides when the piston tube 803 retracts to the bottom end of the manifold 802 for temporary replenishment.

[0032] The working principle of the present invention: When it is necessary to adjust the height of the bottom plate 3, start the reversible motor 901. The output shaft of the reversible motor 901 drives the worm 903 to rotate. Subsequently, the rotating worm 903 transmits the torque force to the driving gear 904 and the driven gear 905 meshing with it, causing the driven gear 905 to be able to drive the second transmission shaft 501 and the bevel gears 502 at both ends thereof to rotate coaxially. By switching the output direction of the reversible motor 901, the transmission direction of the transmission assembly 5 can be changed. Among them, during the lifting stage of the bottom plate 3, the driven gear 905 can drive the second transmission shaft 501 to rotate counterclockwise, and transmit the torque force to the front and rear first transmission shafts 403 through two groups of bevel gears 502 vertically meshed at its ends, causing the front and rear two groups of first transmission shafts 403 and the planar gears 402 to rotate outwardly away from each other. The outwardly rotating planar gear 402 can drive the toothed plate 401 meshing with it upward, so that the toothed plate 401 can smoothly lift the bottom plate 3 to adjust the ground clearance height of the bottom plate 3; Meanwhile, during the lifting stage of the bottom plate 3, two swing rods 701 converging in the middle of the base frame 1 are subjected to the extrusion force of the continuously rising bottom plate 3. Subsequently, the swing rods 701 expand to both sides with the axle seat 704 as the axis. That is, the two swing rods 701 on the same side can push two scraping plates 702 outward through the axle head tubes 703 rotatably arranged at their bottom ends, so that the front and rear two scraping plates 702 can slide outwardly away from each other along the bottom wall of the bottom plate 3. During this period, the moving scraping plates 702 can scrape the dirt adhered to the bottom surface of the bottom plate 3 by virtue of the knife grooves 7024 on their side walls, realizing the cleaning operation of the surface of the bottom plate 3; At the same time, the bottom plate 3 can carry the piston tube 803 to move upward together during the lifting stage, so that the piston tube 803 gradually contracts into the inner cavity of the oil collecting pipe 802, promoting the increase of the hydraulic pressure in the oil collecting pipe 802. The anti-rust oil in the oil collecting pipe 802 can be discharged through the drain valve 804 and introduced into the scraping plate 702 through the piston tube 803, the oil pipe 807 and the axle head tube 703, and then flow to the wiping layer 7023 through the transition cavity 7021 and the oil passage 7022, and be adsorbed and coated on the bottom wall of the cleaned bottom plate 3 by the wiping layer 7023 to form an oil film layer to improve its oxidation resistance, realizing the self-cleaning and maintenance of the bottom plate 3; On the contrary, when the bottom plate 3 enters the sinking stage, the inwardly rotating planar gear 402 drives the toothed plate 401 downward, so that the toothed plate 401 can carry the bottom plate 3 to descend together. At the same time, the two swing rods 701 on the same side are subjected to the downward pulling force of the bottom plate 3, causing the swing rods 701 to converge towards the middle with the axle seat 704 as the axis, and the front and rear two scraping plates 702 can move closer to each other along the bottom wall of the bottom plate 3 from the outside to the inside. At the same time, the piston tube 803 gradually withdraws from the inner cavity of the oil collecting pipe 802, promoting the decrease of the hydraulic pressure in the oil collecting pipe 802. The oil collecting pipe 802 can extract the anti-rust oil stored in the fuel tank through the inlet valve 805 to realize the automatic oiling operation.

[0033] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention; making equivalent substitutions or modifications according to the technical plan of the present invention and its improved conceptions should all be included under the protection of the present invention.

Claims

1. A telescopic chassis with automatically controlled lifting, comprising a base frame (1), characterized in that: The left and right sides of the base frame (1) are equipped with a traveling assembly (2); a bottom plate (3) located inside the traveling assembly (2) is arranged below the base frame (1); the front and rear longitudinal beams of the base frame (1) are equipped with a lifting assembly (4) capable of driving the bottom plate (3) to rise and fall; the cross beam of the base frame (1) is equipped with a transmission assembly (5) and a driving unit (9) for driving the front and rear two sets of lifting assemblies (4) to operate; the left and right cross beams of the base frame (1) are also equipped with a bearing seat (6); the bottom of the bearing seat (6) is equipped with a retractable cleaning assembly (7) capable of sliding along the surface of the bottom plate (3); the front and rear longitudinal beams of the base frame (1) are also equipped with an oil supply assembly (8); The retractable cleaning assembly (7) comprises a swing arm (701), a scraper (702), an axle head tube (703) and an axle seat (704), wherein the axle seat (704) is mounted on the bottom of the bearing seat (6), the scraper (702) is slidably arranged on the bottom of the bottom plate (3), the left and right ends of the scraper (702) are equipped with an axle head tube (703), and the top and bottom ends of the swing arm (701) are rotatably connected to the axle seat (704) and the axle head tube (703) respectively; The oil supply assembly (8) comprises an assembly seat (801), an oil collecting pipe (802), a piston tube (803), a liquid discharge valve (804), a liquid inlet valve (805) and an oil delivery pipe (807), wherein the bottom end of the oil collecting pipe (802) is mounted in the oil reserve chamber of the assembly seat (801), the piston tube (803) is telescopically plugged into the oil collecting pipe (802), the top end of the piston tube (803) is equipped with a liquid discharge valve (804), the bottom end of the piston tube (803) is fixedly connected to the bottom plate (3), the top end of the oil collecting pipe (802) is equipped with a liquid inlet valve (805), the liquid inlet valve (805) is connected to the oil tank, one end of the oil delivery pipe (807) is connected to the bottom end of the piston tube (803), and the other end is connected to the shaft head pipe (703).

2. The automatically controlled lifting telescopic chassis according to claim 1, characterized in that: The front and rear side walls of the swing rod (701) are provided with knife grooves (7024), the bottom of the swing rod (701) is provided with a transition cavity (7021), the middle of which is provided with an oil passage (7022) communicating with the transition cavity (7021), the top of the oil passage (7022) is connected to a wiping layer (7023), the wiping layer (7023) can be flush with the scraper (702) under pressure, the scraper (702) is attached to the bottom wall of the bottom plate (3), and the buckle at the end of the scraper (702) is slidably arranged in a slide groove of the side wall of the bottom plate (3).

3. The telescopic chassis with automatic lifting control according to claim 1, characterized in that: The lifting assembly (4) comprises a toothed plate (401), a planar gear (402), a first transmission shaft (403) and a limiting seat (404), wherein the toothed plate (401) is slidably disposed in a front slot of the limiting seat (404), the limiting seat (404) is mounted on a longitudinal beam, the planar gear (402) disposed on the outside of the limiting seat (404) is meshed with the toothed plate (401), and one end of the first transmission shaft (403) is rotatably disposed on the stand (10), and the other end thereof is fixedly sleeved with the planar gear (402).

4. The automatically controlled lifting telescopic chassis according to claim 3, characterized in that: The transmission assembly (5) comprises a second transmission shaft (501) and a bevel gear (502), wherein the second transmission shaft (501) is rotatably arranged on the top of the bearing seat (6), and two sets of bevel gears (502) are respectively arranged at both ends of the second transmission shaft (501), each set of bevel gears (502) contains two bevel gears (502) meshed vertically, and the two bevel gears (502) are respectively assembled on the second transmission shaft (501) and the end of the first transmission shaft (403) adjacent thereto.

5. The automatically controlled lifting telescopic chassis according to claim 1, characterized in that: The base frame (1) is welded from two groups of front and rear longitudinal beams and two groups of left and right cross beams, and is made of metal. The ends of the left and right cross beams are provided with vertical frames (10).

6. The automatically controlled lifting telescopic chassis according to claim 5, characterized in that: The traveling assembly (2) comprises a suspension (201), a pulley (202) and a crawler track (203), wherein the suspension (201) is welded to the bottom of the stand (10), and rotating shafts are rotatably arranged on the inner sides of the front and rear suspension groups (201), and pulleys (202) are assembled at the ends of the rotating shafts. The two pulleys (202) on the left and the right are connected by a crawler track (203), and a driving unit (9) can be assembled around the rotating shaft on either side.

7. The automatically controlled lifting telescopic chassis according to claim 3, characterized in that: An impeller (806) is arranged in the reserve oil chamber in the assembly seat (801), and the impeller (806) is assembled at the end of the first transmission shaft (403), so that the first transmission shaft (403) can carry the impeller (806) to rotate coaxially, and mix the oil in the reserve oil chamber. A heating device can be arranged in the reserve oil chamber to increase molecular activity, and a through hole is opened on the side wall of the oil collecting pipe (802) located in the reserve oil chamber.

8. The automatically controlled lifting telescopic chassis according to claim 1, characterized in that: The top of the bottom plate (3) is an assembly tray for loading vehicle body parts.

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