Hydraulic automatic lifting device for carrier loader

Abstract

The invention provides a hydraulic automatic lifting device for a carrier lor.The hydraulic automatic lifting device comprises a cannon body auxiliary maneuvering frame, a hydraulic rotating mechanism and a seat plate connecting mechanism, and the cannon body auxiliary maneuvering frame is installed on a vehicle tail end frame of the carrier and used for fixing a cannon body; the hydraulic rotating mechanism comprises two supporting arms, two hydraulic oil cylinders and a rotating connecting shaft, the rotating connecting shaft is rotatably installed on the gun body auxiliary maneuvering frame, the first ends of the two hydraulic oil cylinders are rotatably installed on the gun body auxiliary maneuvering frame respectively, and the second ends of the two hydraulic oil cylinders are rotatably installed on the two supporting arms; the second ends of the two supporting arms are rotationally installed on the rotary connecting shaft. The seat plate connecting mechanism comprises two seat plate connecting assemblies, and the two seat plate connecting assemblies are correspondingly installed at the first ends of the two supporting arms and used for being detachably connected with a seat plate. According to the hydraulic automatic lifting device for the carrier loader, automatic falling and reset control of the seat plate can be achieved, and operation is easy, convenient and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic lifting equipment, and in particular to a hydraulic automatic lifting device for a carrier vehicle. Background Art

[0002] The mortar system mainly adopts the mode of mobile operation on a carrier and shooting from under the vehicle, which can adapt to the combat needs of various terrains. When in use, the mortar body, base plate and tripod are fixed on the carrier through fixing devices. For mortars generally carried by humans, its mobility mainly based on carriers can meet the requirements of rapid mobility in various terrains. However, under field conditions, when using the close-to-vehicle combat mode of shooting from under the vehicle, the mortar system is relatively bulky, and it is time-consuming and laborious to load or unload with the carrier. It is difficult to implement the battle and withdraw and transfer within the specified operation time, and it is easy to cause injuries to personnel and damage to equipment. Summary of the invention

[0003] The purpose of the present invention is to provide a hydraulic automatic lifting device for a carrier vehicle, which can solve the problem that the existing mortar system and the carrier vehicle are difficult to load or unload.

[0004] The present invention provides a hydraulic automatic lifting device for a transport vehicle, comprising: A gun body auxiliary mobile frame is installed on the rear end frame of the carrier vehicle, and the gun body auxiliary mobile frame is used to fix the gun body; A hydraulic slewing mechanism, comprising two support arms, two hydraulic oil cylinders and a slewing connecting shaft, wherein the slewing connecting shaft is rotatably mounted on the gun body auxiliary mobile frame, the first ends of the two hydraulic oil cylinders are rotatably mounted on the gun body auxiliary mobile frame, the second ends of the two hydraulic oil cylinders are rotatably mounted on the two support arms at positions close to the first ends, and the second ends of the two support arms are rotatably mounted on the slewing connecting shaft respectively; The seat plate connection mechanism comprises two seat plate connection components, the two seat plate connection components are correspondingly installed on the first ends of the two support arms, and the seat plate connection mechanism is used for detachably connecting with the seat plate.

[0005] According to a hydraulic automatic lifting device for a carrier vehicle provided by the present invention, the gun body auxiliary mobile frame includes two connecting seats, a gun body platform and two gun hoops, the two connecting seats are parallel to each other, and the two connecting seats are respectively connected and fixed to the beams of the rear end frame of the carrier vehicle; the gun body platform is welded and fixed to the two connecting seats, and the two gun hoops are respectively installed and fixed to the left and right ends of the gun body platform.

[0006] According to the hydraulic automatic lifting device for a carrier vehicle provided by the present invention, a plurality of platform reinforcement support blocks are respectively welded between each of the connecting seats and the gun platform.

[0007] According to a hydraulic automatic lifting device for a carrier vehicle provided by the present invention, support arm limit blocks are respectively installed and fixed on the gun body platform at positions corresponding to the support arms.

[0008] According to a hydraulic automatic lifting device for a carrier vehicle provided by the present invention, the rotary connecting shaft is rotatably installed on the two connecting seats, the two hydraulic cylinders are arranged between the two connecting seats, and the two hydraulic cylinders are arranged between the two supporting arms.

[0009] According to a hydraulic automatic lifting device for a transport vehicle provided by the present invention, the first ends of the two hydraulic cylinders are rotatably installed corresponding to the two connecting seats through a first support assembly, the first support assembly includes a support column, a first connecting bolt and a first connecting nut, the support column is welded and fixed to the connecting seat, a first through hole is provided in the support column, the first connecting bolt passes through the first through hole and is connected to the first connecting nut, and the first end of the hydraulic cylinder is rotatably installed on the first connecting bolt between the first connecting nut and the support column.

[0010] According to a hydraulic automatic lifting device for a transport vehicle provided by the present invention, the second ends of the two hydraulic cylinders are rotatably installed corresponding to the two support arms through second support components, and the second support components include a U-shaped support seat, a second connecting bolt and a second connecting nut. The U-shaped support seat is fixedly installed on the inner side of the support arm, and the U-shaped support seat is provided with a second through hole. The second connecting bolt passes through the second through hole and is connected to the second connecting nut, and the second end of the hydraulic cylinder is rotatably installed on the second connecting bolt in the U-shaped support seat.

[0011] According to a hydraulic automatic lifting device for a transport vehicle provided by the present invention, the seat plate connecting assembly includes a seat plate connecting block, an L-shaped connecting latch and a safety pin, the seat plate connecting block is fixedly installed on the inner side of the support arm, a first connecting hole is provided on the seat plate connecting block, a second connecting hole corresponding to the first connecting hole is provided on the seat plate, a plug-in hole adapted to the safety pin is provided on the L-shaped connecting latch, and one end of the L-shaped connecting latch passes through the first connecting hole and the second connecting hole and is plugged and fixed with the safety pin.

[0012] The hydraulic automatic lifting device for a carrier vehicle provided by the present invention further comprises a hydraulic power unit, and the hydraulic power unit is connected to the two hydraulic cylinders respectively through hydraulic oil pipes.

[0013] A hydraulic automatic lifting device for a carrier vehicle provided by the present invention further includes a wired controller and a wireless remote controller, wherein the wired controller is electrically connected to the hydraulic power unit via a line, and the wireless remote controller is wirelessly connected to the hydraulic power unit.

[0014] The hydraulic automatic lifting device for a carrier vehicle provided by the present invention is provided with a gun body auxiliary mobile frame, a hydraulic rotating mechanism and a seat plate connecting mechanism, wherein the gun body auxiliary mobile frame is installed on the rear end frame of the carrier vehicle, and the gun body auxiliary mobile frame is used to fix the gun body of the mortar; wherein the hydraulic rotating mechanism includes two support arms, two hydraulic oil cylinders and a rotating connecting shaft, the rotating connecting shaft is rotatably installed on the gun body auxiliary mobile frame, the first ends of the two hydraulic oil cylinders are respectively rotatably installed on the gun body auxiliary mobile frame, the second ends of the two hydraulic oil cylinders are correspondingly rotatably installed at positions close to the first ends on the two support arms, and the second ends of the two support arms are respectively rotatably installed with the rotating connecting shaft; the seat plate connecting mechanism is provided with two seat plate connecting assemblies, the two seat plate connecting assemblies are correspondingly installed on the first ends of the two support arms, and the seat plate connecting mechanism is used for detachably connecting with the seat plate of the mortar. When in use, the mortar barrel is fixed on the barrel auxiliary mobile frame, the mortar base plate is connected to the base plate connecting mechanism, and then the two hydraulic cylinders are controlled to perform a contraction action respectively, so that the first ends of the two support arms can be driven to swing from top to bottom, thereby driving the mortar base plate to automatically descend from the carrier vehicle to achieve unloading of the base plate; by controlling the two hydraulic cylinders to perform an extension action respectively, the first ends of the two support arms can be driven to swing from bottom to top, thereby driving the mortar base plate to automatically rise to the carrier vehicle to achieve loading of the base plate. Thus, by placing the base plate and the barrel on the hydraulic automatic lifting device for the carrier vehicle of the embodiment of the present invention, the mortar base plate can be controlled to automatically fall from the carrier vehicle or reset to the carrier vehicle, the operation is simple and reliable, the loading and unloading time is shortened, and the timeliness and mobility of the artillery deployment and transfer are improved, thereby overcoming the problem of difficulty in taking out the base plate and the barrel completely by manpower, solving the pressure of gunner coordination caused by the height and strength differences of the operators, greatly shortening the time of using and collecting the gun, and improving the combat effectiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a first isometric view of the hydraulic automatic lifting device for a carrier vehicle of the present invention; Figure 2 It is a second axonometric view of the hydraulic automatic lifting device for a carrier vehicle of the present invention; Figure 3 It is a schematic diagram of the installation of the first end of the hydraulic oil cylinder and the connecting seat in the first direction of the hydraulic automatic lifting device for the carrier vehicle of the present invention; Figure 4 It is a schematic diagram of the installation of the first end of the hydraulic oil cylinder and the connecting seat in the second direction of the hydraulic automatic lifting device for the carrier vehicle of the present invention; Figure 5 It is a schematic diagram of the installation of the second end of the hydraulic cylinder and the support arm in the hydraulic automatic lifting device for a carrier vehicle of the present invention.

[0017] Description of reference numerals: 1. Support arm; 2. Hydraulic cylinder; 3. Rotary connecting shaft; 4. Connecting seat; 5. Gun platform; 6. Gun hoop; 7. Platform reinforcement support block; 8. Support arm limit block; 9. Support column; 10. First connecting bolt; 11. First connecting nut; 12. Reinforcement rib plate; 13. U-shaped support seat; 14. Second connecting bolt; 15. Second connecting nut; 16. Resonance block; 17. Seat plate connecting block; 18. L-shaped connecting bolt. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0020] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] like Figures 1 to 5 As shown, the hydraulic automatic lifting device for a carrier vehicle according to an embodiment of the present invention comprises a gun body auxiliary mobile frame, a hydraulic rotating mechanism and a seat plate connecting mechanism.

[0022] Among them, the gun body auxiliary mobile frame is installed on the rear end frame of the carrier vehicle, and the gun body auxiliary mobile frame is used to fix the gun body of the mortar.

[0023] The hydraulic slewing mechanism includes two support arms 1, two hydraulic cylinders 2 and a slewing connecting shaft 3, the slewing connecting shaft 3 is rotatably mounted on the gun body auxiliary mobile frame, the first ends of the two hydraulic cylinders 2 are rotatably mounted on the gun body auxiliary mobile frame, the second ends of the two hydraulic cylinders 2 are rotatably mounted on the two support arms 1 at positions close to the first ends, and the second ends of the two support arms 1 are rotatably mounted on the slewing connecting shaft 3. And the installation position of the slewing connecting shaft 3 on the gun body auxiliary mobile frame is higher than the installation position of the hydraulic cylinder 2 and the gun body auxiliary mobile frame.

[0024] The seat plate connection mechanism includes two seat plate connection components, and the two seat plate connection components are correspondingly installed at the first ends of the two support arms 1. The seat plate connection mechanism is used for detachable connection with the seat plate of the mortar.

[0025] When in use, the mortar body is mounted and fixed on the body auxiliary mobile frame, the mortar base plate is connected to the base plate connecting mechanism, and then the two hydraulic cylinders 2 are controlled to retract respectively, which can drive the first ends of the two support arms 1 to swing from top to bottom, thereby driving the mortar base plate to automatically descend from the carrier vehicle to achieve unloading of the base plate. By controlling the two hydraulic cylinders 2 to extend respectively, the first ends of the two support arms 1 can be driven to swing from bottom to top, thereby driving the mortar base plate to automatically rise to the carrier vehicle to achieve loading of the base plate.

[0026] Therefore, by placing the base plate and the gun body on the hydraulic automatic lifting device for the carrier vehicle of the embodiment of the present invention, the base plate of the mortar can be controlled to automatically fall from the carrier vehicle or reset to the carrier vehicle. The operation is simple and reliable, which shortens the time for loading and unloading, and improves the timeliness and maneuverability of artillery deployment and transfer, thereby overcoming the problem of difficulty in operating the base plate and the gun body entirely by manpower, solving the coordination pressure of the gunner caused by the height and strength differences of the operators, greatly shortening the time for using and collecting the gun, and improving combat effectiveness.

[0027] Furthermore, by using the hydraulic automatic lifting device for a carrier vehicle according to the embodiment of the present invention, the original seat plate and gun barrel fixed positions on the carrier vehicle can be vacated for placing other equipment, thereby achieving the purpose of enhancing the firepower support capability.

[0028] Furthermore, by using the hydraulic automatic lifting device for a carrier vehicle according to the embodiment of the present invention, when it is inconvenient to construct a seat plate pit, the vehicle's own gravity can be used to offset part of the recoil force through the cooperation of the vehicle's body weight, the hydraulic rotating mechanism and the seat plate, so that small-charge shooting can be carried out quickly and easily, expanding the scenarios for actual combat applications of weapons.

[0029] Specifically, the gun body auxiliary mobile frame includes two connecting seats 4, a gun body platform 5 and two gun hoops 6. The two connecting seats 4 are parallel to each other and are respectively connected and fixed to the beams of the rear end frame of the carrier vehicle. The gun body platform 5 is welded and fixed to the two connecting seats 4, and the two gun hoops 6 are respectively fixed to the left and right ends of the gun body platform 5 by bolts.

[0030] The connecting seat 4 can be made of a steel plate with a thickness of 15 mm and fixed to the beam of the rear end frame of the carrier vehicle using 12.9 grade high-strength bolts.

[0031] The barrel platform may be made of a rectangular steel plate, and the bottom surface of the barrel platform 5 is fixed to the upper ends of the two connecting seats 4 by welding.

[0032] When in use, the gun body is placed on the gun body platform 5 and is installed and fixed by the left and right gun hoops 6, which not only reduces the fixing height of the gun body but also enables quick and convenient loading and unloading of the gun body.

[0033] Among them, a plurality of platform reinforcement support blocks 7 are respectively welded between each connecting seat 4 and the gun body platform 5 , which effectively improves the installation strength and reliability of the gun body platform 5 on the connecting seat 4 .

[0034] Specifically, support arm limit blocks 8 are respectively installed and fixed at positions corresponding to each support arm 1 on the gun body platform 5. By providing two support arm limit blocks 8, the upward turning position of each support arm 1 can be limited respectively to prevent each support arm 1 from turning over excessively.

[0035] Specifically, the rotary connecting shaft 3 is rotatably mounted on two connecting seats 4 , the two hydraulic cylinders 2 are disposed between the two connecting seats 4 , and the two hydraulic cylinders 2 are disposed between the two supporting arms 1 .

[0036] Each support arm 1 is composed of two mutually parallel square steels, and the connecting seat 4 is correspondingly arranged between the two square steels to ensure the reliability of the connection installation and improve the overall structural strength of the support arm 1.

[0037] Specifically, the first ends of the two hydraulic cylinders 2 are rotatably mounted corresponding to the two connecting seats 4 through the first support assembly. The first support assembly includes a support column 9, a first connecting bolt 10 and a first connecting nut 11. The support column 9 is welded and fixed to the connecting seat 4. A first through hole is provided in the support column 9. The first connecting bolt 10 passes through the first through hole and is connected to the first connecting nut 11. The first end of the hydraulic cylinder 2 is rotatably mounted on the first connecting bolt 10 between the first connecting nut 11 and the support column 9.

[0038] The surface on the first connecting bolt 10 that matches with the support column 9 and the first end of the hydraulic cylinder 2 is a smooth surface, and only the end portion of the first connecting bolt 10 is provided with a thread for threaded connection with the first connecting nut 11 .

[0039] The connection base 4 is provided with a mounting hole, through which the support column 9 passes and is welded and fixed. In order to improve the connection strength and reliability between the support column 9 and the connection base 4, a plurality of reinforcing ribs 12 are respectively provided on the inner and outer surfaces of the connection base 4 for welding and fixing with the support column 9.

[0040] Among them, a single hydraulic cylinder can withstand a weight of 1 ton, thus ensuring the reliability of the device operation.

[0041] Specifically, the second ends of the two hydraulic cylinders 2 are rotatably mounted corresponding to the two support arms 1 through the second support assembly. The second support assembly includes a U-shaped support seat 13, a second connecting bolt 14 and a second connecting nut 15. The U-shaped support seat 13 is welded and fixed to the inner side of the support arm 1. A second through hole is provided on the U-shaped support seat 13, and a third through hole is provided on the support arm 1. The second connecting bolt 14 passes through the third through hole and the second through hole respectively and is connected to the second connecting nut 15. The second end of the hydraulic cylinder 2 is rotatably mounted on the second connecting bolt 14 in the U-shaped support seat 13.

[0042] The surface of the second connecting bolt 14 that matches the support arm 1 and the U-shaped support seat 13 is a smooth surface, and only the end portion of the second connecting bolt 14 is provided with a thread for threaded connection with the second connecting nut 15 .

[0043] Specifically, two resonance blocks 16 are installed on the rotary connecting shaft 3. When the hydraulic cylinder 2 drives the support arm 1 to flip upward to the right position, it will contact the support arm limit block 8. Since the rotary connecting shaft 3 is relatively long, when the support arm 1 contacts and vibrates with the support arm limit block 8, the rotary connecting shaft 3 will have a rebound force. By setting two resonance blocks 16, the vibration can be reduced, and the reliability of the device during operation is further improved.

[0044] The rotary connecting shaft 3 may be a steel round bar with a size of φ30mm×1000mm.

[0045] Specifically, the seat plate connection assembly includes a seat plate connection block 17, an L-shaped connection latch 18 and a safety pin (not shown in the figure). The seat plate connection block 17 is welded and fixed to the inner side of the support arm 1. A first connection hole is provided on the seat plate connection block 17, and a second connection hole corresponding to the first connection hole is provided on the seat plate. The L-shaped connection latch 18 is provided with a plug-in hole adapted to the safety pin. One end of the L-shaped connection latch 18 passes through the first connection hole and the second connection hole and is plugged and fixed with the safety pin.

[0046] Among them, the extension direction of each seat plate connecting block 17 forms an angle of 15 to 30 degrees with the axis of the corresponding support arm 1. When the support arm 1 is flipped upward into position, the seat plate connecting block 17 is tilted upward; when the support arm 1 is flipped downward into position, the seat plate connecting block 17 is almost vertically downward.

[0047] That is, when connecting the seat plate and the seat plate connecting mechanism, the seat plate is first set between the two seat plate connecting blocks 17, and the second connecting hole on the seat plate is set corresponding to the first connecting hole on the seat plate connecting block 17, and then one end of the L-shaped connecting bolt 18 is respectively passed through the first connecting hole and the second connecting hole, and then the safety pin is inserted into the plug hole of the L-shaped connecting bolt 18 to fix it. When the seat plate needs to be disassembled, the safety pin is first removed, and then the L-shaped connecting bolt 18 can be pulled out.

[0048] When the two support arms 1 are turned over and dropped, the safety pin is removed, and the L-shaped connecting latch 18 is pulled out to remove the seat plate. When there is frozen soil and it is impossible to dig a seat plate pit, the seat plate is used in conjunction with the hydraulic rotary mechanism without removing the seat plate, and small-sized charge shooting can be carried out at this time.

[0049] The seat plate connecting block 17 is made of a plate with a thickness of 20 mm, the L-shaped connecting latch 18 is made of a plate with a thickness of 20 mm, and the safety pin is a B-type elastic cotter pin.

[0050] Specifically, the hydraulic automatic lifting device for the carrier vehicle also includes a hydraulic power unit (not shown in the figure), which is connected to the two hydraulic cylinders 2 through hydraulic oil pipes to provide driving force for the extension and retraction action of the hydraulic cylinders 2.

[0051] Among them, the hydraulic power unit is an existing equipment. The hydraulic power unit can be powered by DC24V with a power of 3Kw. A protective cover made of a 4mm thick iron plate can be set on the outside of the hydraulic power unit to resist the damage caused by fragments.

[0052] Specifically, the hydraulic automatic lifting device for a transport vehicle further includes a wired controller (not shown in the figure) and a wireless remote controller (not shown in the figure), the wired controller is electrically connected to the hydraulic power unit through a line, and the wireless remote controller is wirelessly connected to the hydraulic power unit. That is, the hydraulic automatic lifting device for a transport vehicle in the embodiment of the present invention is controlled by both wired and wireless control methods. When the wireless remote controller cannot be used due to electromagnetic interference, it can also be controlled by the wired controller, which further improves the reliability and safety of the device.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydraulic automatic lifting device for a transport vehicle, characterized in that: include: A gun body auxiliary mobile frame is installed on the rear end frame of the carrier vehicle, and the gun body auxiliary mobile frame is used to fix the gun body; A hydraulic slewing mechanism, comprising two support arms, two hydraulic oil cylinders and a slewing connecting shaft, wherein the slewing connecting shaft is rotatably mounted on the gun body auxiliary mobile frame, the first ends of the two hydraulic oil cylinders are rotatably mounted on the gun body auxiliary mobile frame, the second ends of the two hydraulic oil cylinders are rotatably mounted on the two support arms at positions close to the first ends, and the second ends of the two support arms are rotatably mounted on the slewing connecting shaft respectively; The seat plate connection mechanism comprises two seat plate connection components, the two seat plate connection components are correspondingly installed on the first ends of the two support arms, and the seat plate connection mechanism is used for detachably connecting with the seat plate.

2. The automatic hydraulic lifting device for a carrier vehicle according to claim 1, characterized in that: The gun body auxiliary mobile frame includes two connecting seats, a gun body platform and two gun hoops. The two connecting seats are parallel to each other, and the two connecting seats are respectively connected and fixed to the beams of the rear end frame of the carrier vehicle; the gun body platform is welded and fixed to the two connecting seats, and the two gun hoops are respectively installed and fixed to the left and right ends of the gun body platform.

3. The automatic hydraulic lifting device for a carrier vehicle according to claim 2, characterized in that: A plurality of platform reinforcement support blocks are respectively welded between each of the connecting seats and the gun body platform.

4. The automatic hydraulic lifting device for a carrier vehicle according to claim 2, characterized in that: Support arm limiting blocks are respectively installed and fixed at positions on the gun body platform corresponding to the support arms.

5. The automatic hydraulic lifting device for a carrier vehicle according to claim 2, characterized in that: The rotary connecting shaft is rotatably installed on the two connecting seats, the two hydraulic cylinders are arranged between the two connecting seats, and the two hydraulic cylinders are arranged between the two supporting arms.

6. The automatic hydraulic lifting device for a carrier vehicle according to claim 2, characterized in that: The first ends of the two hydraulic cylinders are rotatably mounted corresponding to the two connecting seats through a first support assembly, the first support assembly includes a support column, a first connecting bolt and a first connecting nut, the support column is welded and fixed to the connecting seat, a first through hole is provided in the support column, the first connecting bolt passes through the first through hole and is connected to the first connecting nut, and the first end of the hydraulic cylinder is rotatably mounted on the first connecting bolt between the first connecting nut and the support column.

7. The automatic hydraulic lifting device for a carrier vehicle according to claim 1, characterized in that: The second ends of the two hydraulic cylinders are rotatably mounted corresponding to the two support arms through a second support assembly, and the second support assembly includes a U-shaped support seat, a second connecting bolt and a second connecting nut. The U-shaped support seat is fixedly mounted on the inner side of the support arm, and the U-shaped support seat is provided with a second through hole. The second connecting bolt passes through the second through hole and is connected to the second connecting nut, and the second end of the hydraulic cylinder is rotatably mounted on the second connecting bolt in the U-shaped support seat.

8. The automatic hydraulic lifting device for a carrier vehicle according to claim 1, characterized in that: The seat plate connection assembly includes a seat plate connection block, an L-shaped connection latch and a safety pin. The seat plate connection block is fixedly installed on the inner side of the support arm. The seat plate connection block is provided with a first connection hole, and the seat plate is provided with a second connection hole corresponding to the first connection hole. The L-shaped connection latch is provided with a plug-in hole adapted to the safety pin, and one end of the L-shaped connection latch passes through the first connection hole and the second connection hole and is plugged and fixed with the safety pin.

9. The automatic hydraulic lifting device for a carrier vehicle according to claim 1, characterized in that: It also includes a hydraulic power unit, which is connected to the two hydraulic cylinders through hydraulic oil pipes.

10. The automatic hydraulic lifting device for a carrier vehicle according to claim 9, characterized in that: It also includes a wired controller and a wireless remote controller. The wired controller is electrically connected to the hydraulic power unit through a line, and the wireless remote controller is wirelessly connected to the hydraulic power unit.

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