Balanced lifting appliance for loading and unloading vehicle

Abstract

The invention relates to the technical field of lifting appliance devices for loading and unloading, and particularly discloses a balanced lifting appliance for a loading and unloading truck, which comprises a main body structure, a retractable structure and a bearing structure, the folding and unfolding structure is fixedly arranged on the main body structure, the bearing structure is fixedly arranged on the main body structure, and the bearing structure is connected with the folding and unfolding structure; the main body structure is used for bearing and moving, the folding and unfolding structure is used for controlling the lifting and angle of the bearing structure, and the bearing structure is used for bearing and carrying goods; the lifting assembly, the retracting and releasing structure and the bearing structure work cooperatively, the first hydraulic cylinder controls the swing arm to drive the hanging bracket to ascend and descend and move forwards, the second hydraulic cylinder is matched with the steel rope to achieve ascending and descending of the two ends of the bearing base in different modes, the bearing base can rapidly adjust the position and posture, and the loading and unloading time is shortened; cargoes can conveniently enter and exit from the bearing seat through the conveying rollers, loading and unloading efficiency is further improved, and the efficient operation requirement of modern logistics is met.

Description

Technical Field

[0001] The invention relates to the technical field of a lifting device for loading and unloading, in particular to a balanced lifting device for loading and unloading a vehicle. Background Art

[0002] A sling for a loading and unloading vehicle is a device used to lift and move heavy objects when loading and unloading goods, and is widely used in ports, warehouses, factories and other places; existing slings are mostly clamped by mechanical arms, and coordinated with slings and single or double hooks, but when lifting heavier goods, they are prone to slipping or swinging due to unstable force, posing a safety hazard, and a single sling, hook and clamping mechanism is difficult to carry and has low work efficiency when carrying some larger or more goods, such as large household appliances, washing machines and refrigerators, or small wine boxes, which need to be stacked for quick loading and unloading. Summary of the invention

[0003] The purpose of the present invention is to solve the technical problems of inconvenience in handling large goods and low efficiency in handling small goods in the prior art, and to provide a balanced sling for loading and unloading vehicles.

[0004] In order to solve the above-mentioned problem, the present invention provides the following technical solutions: a balanced sling for loading and unloading vehicles, comprising a main structure, a retractable structure and a bearing structure; the retractable structure is fixedly arranged on the main structure, the bearing structure is fixedly arranged on the main structure, and the bearing structure is connected to the retractable structure; the main structure is used for bearing and moving, the retractable structure is used for controlling the lifting and angle of the bearing structure, and the bearing structure is used for bearing and transporting goods.

[0005] Preferably, the main structure includes a vehicle body, two pairs of wheels, an armrest, a controller and a lifting assembly; the two pairs of wheels are symmetrically arranged on the lower wall of the vehicle body and located at the four corners, the armrest is fixedly arranged on the left end of the vehicle body, the controller is fixedly arranged on the armrest, and the lifting assembly is fixedly arranged in the middle of the upper wall of the vehicle body.

[0006] Preferably, the lifting assembly includes a base, a pair of two pairs of swing arms, a hanger, a first hydraulic cylinder, three guide wheels, a landing gear and a pair of second hydraulic cylinders; the base is fixedly arranged in the middle of the upper wall of the vehicle body, one end of the two pairs of swing arms are respectively arranged in parallel on the front and rear side walls of the base, the hanger is L-shaped, one end of the hanger is movably arranged between the other ends of the swing arms, a rope hole is opened through the middle of the other end of the hanger, one end of the first hydraulic cylinder is movably arranged on the right end of the base, and the telescopic end of the first hydraulic cylinder is movably connected between one of the pairs of swing arms, wherein two guide wheels are respectively movably arranged on the upper and lower side walls of the other end of the hanger, and are respectively located on the left and right sides of the rope hole in an alternating symmetry, another guide wheel is movably arranged on the upper wall of the other end of the hanger and is located at the left end, the landing gear is fixedly arranged on the other end of the hanger, and the front and rear ends of the landing gear are respectively located symmetrically on the front and rear sides of the hanger, and one end of a pair of second hydraulic cylinders is respectively fixedly arranged on the front and rear lower walls of the landing gear.

[0007] Preferably, the retractable structure includes a base, a first roller frame, a rope roller, a gear box, a motor, a pair of battery bodies, a steel rope, a connecting rod and a locking unit; the base is fixedly arranged on the upper wall of the left end of the vehicle body, the first roller frame is fixedly arranged in the middle of the upper wall of the left end of the base, the rope roller is movably arranged on the first roller frame, the gear box is fixedly arranged on the upper wall of the base and is located at the front side of the first roller frame, the output end of the gear box is connected to the rope roller, the motor is fixedly arranged on the front side of the gear box, and the motor driving end is connected to the input end of the gear box, a pair of battery bodies are symmetrically arranged on the upper walls of the front and rear ends of the base, the locking unit is fixedly arranged in the middle of the upper wall of the right end of the base, and the locking unit corresponds to the first roller frame, one end of the steel rope is connected to the rope roller, and the other end of the steel rope movably passes through the upper walls of two guide wheels and the rope hole, the steel rope movably passes through the locking unit, and the middle of the connecting rod is fixedly arranged on the other end of the steel rope and is located below the other end of the hanger.

[0008] Preferably, the locking unit includes a second roller frame, a third roller frame, a pair of guide rollers and a pair of third hydraulic cylinders; the second roller frame is fixedly arranged on the upper wall of the base and is located on the right side of the first roller frame, the third roller frame is movably arranged on the upper wall of the right end of the base and is located on the right side of the second roller frame, the height of the third roller frame is less than the height of the second roller frame, a pair of guide rollers are respectively movably arranged on the second roller frame and the third roller frame, one end of a pair of the third hydraulic cylinders are respectively movably connected to the front and rear side walls of the second roller frame, and the telescopic ends of the third hydraulic cylinders are respectively tilted and movably connected to the front and rear side walls of the third roller frame.

[0009] Preferably, the bearing structure includes a bearing seat, a plurality of conveying rollers, a first guide seat, a pair of second guide seats, a pair of first adapters and a pair of second adapters; the bearing seat is L-shaped, and a conveying groove is opened in the middle of the upper wall at one end of the bearing seat, and the plurality of conveying rollers are equidistantly and movably embedded in the conveying groove at one end of the bearing seat, and the upper wall of the conveying rollers is located above one end of the bearing seat, one end of the first guide seat is fixedly arranged on one end of the bearing seat, and the upper wall of the first guide seat is an inclined wall surface, a pair of the second guide seats are symmetrically arranged in the middle of the front and rear side walls of one end of the bearing seat, and the upper wall of the second guide seat is an inclined wall surface, a pair of the first adapters are movably arranged on the front and rear side walls of one end of the bearing seat, and the first adapters are fixedly connected to the telescopic end of the second hydraulic cylinder; a pair of the second adapters are fixedly arranged on the left side wall of the other end of the bearing seat, and are symmetrically close to the front and rear ends, and the second adapters are movably mounted on the two ends of the connecting rod.

[0010] Preferably, the steel ropes are staggered and passed between the guide rollers, so as to achieve locking of the steel ropes.

[0011] Preferably, the guide roller is contracted and relatively fitted by a third hydraulic cylinder.

[0012] The balanced lifting device for loading and unloading a vehicle proposed by the present invention has the following beneficial effects: 1. Adapt to various types of goods and loading and unloading requirements: The load-bearing structure is cleverly designed, and the load-bearing seat is equipped with conveyor rollers. When loading and unloading heavier goods, the conveyor rollers at one end of the load-bearing seat can be adjusted to a horizontal state to raise it to the height of the carriage or extend it into the carriage, and the goods can be pushed with the help of the conveyor rollers to complete the loading and unloading; when loading and unloading smaller box goods, the goods can be pushed to the load-bearing seat through the first guide seat, and then moved and swung with the help of the conveyor rollers, and the loading and unloading can be achieved in conjunction with the lifting of the load-bearing seat and the second guide seat, which can meet the handling needs of goods of different sizes and weights.

[0013] 2. Improve loading and unloading efficiency: The lifting assembly, retractable structure and bearing structure work together. The first hydraulic cylinder controls the swing arm to drive the hanger to rise and fall and move forward. The second hydraulic cylinder cooperates with the steel rope to realize different lifting modes at both ends of the bearing seat, so that the bearing seat can quickly adjust its position and posture, reducing loading and unloading time. The setting of the conveyor roller facilitates the entry and exit of goods from the bearing seat, further improving the loading and unloading efficiency and meeting the requirements of efficient operation of modern logistics.

[0014] 3. Ensure operational safety: The locking unit and the hydraulic cylinder cooperate with each other. When the load-bearing seat is suspended with cargo, the third hydraulic cylinder drives the third roller frame to flip, so that the guide roller clamps the staggered steel ropes and uses the twisting force to lock the steel ropes to prevent the cargo from shaking and falling during the lifting process. The limit design of the swing arm on the hanger in the lifting assembly also ensures the stability of the lifting process and reduces safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of the first assembly structure of the present invention; Figure 2 It is a schematic diagram of a second assembly structure of the present invention; Figure 3 This is a schematic diagram of the main structure split structure; Figure 4 It is a schematic diagram of the split structure of the retractable structure; Figure 5 It is a schematic diagram of the split structure of the bearing structure; Figure 6 for Figure 3 A local enlarged view of point A in FIG. Figure 7 for Figure 1 A partial enlarged view of point B in FIG.

[0016] In the figure: 1. main structure; 11. vehicle body; 12. wheels; 13. handrail; 14. controller; 15. lifting assembly; 151. base; 152. swing arm; 153. hanger; 154. first hydraulic cylinder; 155. guide wheel; 156. landing gear; 157. second hydraulic cylinder; 2. retractable structure; 21. base; 22. first roller frame; 23. rope roller; 24. gear box; 25. motor; 26. battery body; 27. steel rope; 28. connecting rod; 29. ​​locking unit; 291. second roller frame; 292. third roller frame; 293. guide roller; 294. third hydraulic cylinder; 3. bearing structure; 31. bearing seat; 32. conveying roller; 33. first guide seat; 34. second guide seat; 35. first adapter; 36. second adapter; 4. rope hole. DETAILED DESCRIPTION

[0017] The specific implementation modes of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0018] like Figure 1-Figure 7 As shown, the present invention provides a technical solution: a balanced sling for loading and unloading vehicles, comprising a main structure 1, a retractable structure 2 and a bearing structure 3; the retractable structure 2 is fixedly arranged on the main structure 1, the bearing structure 3 is fixedly arranged on the main structure 1, and the bearing structure 3 is connected to the retractable structure 2; the main structure 1 is used for bearing and moving, the retractable structure 2 is used for controlling the lifting and angle of the bearing structure 3, and the bearing structure 3 is used for bearing and transporting goods.

[0019] As a further solution of the present invention, the main structure 1 includes a vehicle body 11, two pairs of wheels 12, an armrest 13, a controller 14 and a lifting assembly 15; the two pairs of wheels 12 are symmetrically arranged on the lower wall of the vehicle body 11 and located at the four corners, the armrest 13 is fixedly arranged on the left end of the vehicle body 11, the controller 14 is fixedly arranged on the armrest 13, and the lifting assembly 15 is fixedly arranged in the middle of the upper wall of the vehicle body 11; the vehicle body 11 is moved by means of the wheels 12 through the armrest 13, and the lifting assembly 15 is controlled by the controller 14.

[0020] As a further solution of the present invention, the lifting assembly 15 includes a base 151, two pairs of swing arms 152, a hanger 153, a first hydraulic cylinder 154, three guide wheels 155, a landing gear 156 and a pair of second hydraulic cylinders 157; the base 151 is fixedly arranged in the middle of the upper wall of the vehicle body 11, one end of the two pairs of swing arms 152 are respectively arranged in parallel on the front and rear side walls of the base 151, the hanger 153 is L-shaped, one end of the hanger 153 is movably arranged between the other ends of the swing arms 152, and a rope hole 4 is opened in the middle of the other end of the hanger 153, one end of the first hydraulic cylinder 154 is movably arranged on the right end of the base 151, and the telescopic end of the first hydraulic cylinder 154 is movably connected between one pair of swing arms 152, wherein the two guide wheels 15 5 are movably arranged on the upper and lower side walls of the other end of the hanger 153, and are respectively located on the left and right sides of the rope hole 4 in an alternating and symmetrical manner. Another guide wheel 155 is movably arranged on the upper wall of the other end of the hanger 153 and is located at the left end. The landing gear 156 is fixedly arranged on the other end of the hanger 153, and the front and rear ends of the landing gear 156 are respectively located on the front and rear sides of the hanger 153 and are symmetrical. One end of a pair of second hydraulic cylinders 157 is respectively fixedly arranged on the front and rear lower walls of the landing gear 156. The telescopic movement of the first hydraulic cylinder 154 drives one of the pairs of swing arms 152 to flip on the base 151. Since the two pairs of swing arms 152 are arranged in parallel and symmetrically, the hanger 153 is driven to be lifted or moved forward, and the second hydraulic cylinder 157 is carried by the landing gear 156.

[0021] As a further solution of the present invention, the retractable structure 2 includes a base 21, a first roller frame 22, a rope roller 23, a gear box 24, a motor 25, a pair of battery bodies 26, a steel rope 27, a connecting rod 28 and a locking unit 29; the base 21 is fixedly arranged on the upper wall of the left end of the vehicle body 11, the first roller frame 22 is fixedly arranged in the middle of the upper wall of the left end of the base 21, the rope roller 23 is movably arranged on the first roller frame 22, the gear box 24 is fixedly arranged on the upper wall of the base 21 and is located on the front side of the first roller frame 22, the output end of the gear box 24 is connected to the rope roller 23, the motor 25 is fixedly arranged on the front side of the gear box 24, and the driving end of the motor 25 is connected to the input end of the gear box 24, a pair of battery bodies 26 are symmetrically arranged on the upper walls of the front and rear ends of the base 21, the locking unit 29 is fixedly arranged in the middle of the upper wall of the right end of the base 21, and the locking unit 29 is fixedly arranged in the middle of the upper wall of the right end of the base 21. The unit 29 corresponds to the first roller frame 22, one end of the steel rope 27 is connected to the rope roller 23, and the other end of the steel rope 27 movably passes through the upper walls of the two guide wheels 155 and the rope hole 4, the steel rope 27 movably passes through the locking unit 29, and the middle part of the connecting rod 28 is fixedly arranged on the other end of the steel rope 27 and is located below the other end of the hanger 153; the motor 25 drives the rope roller 23 to rotate with the help of the transmission of the gear box 24, and the gear box 24 is used to prevent the gravity of the goods from directly acting on the motor 25, and the steel rope 27 is retracted and released through the rotation of the rope roller 23, and the connecting rod 28 on the steel rope 27 drives one end of the bearing structure 3 to rise and fall, and the locking unit 29 is used to realize the locking limit of the steel rope 27 close to the rope roller 23. In order to realize the locking of the steel rope 27, the steel rope 27 is staggered and passed between the guide rollers 293 to design the locking requirements.

[0022] As a further solution of the present invention, the locking unit 29 includes a second roller frame 291, a third roller frame 292, a pair of guide rollers 293 and a pair of third hydraulic cylinders 294; the second roller frame 291 is fixedly arranged on the upper wall of the base 21 and is located on the right side of the first roller frame 22, the third roller frame 292 is movably arranged on the upper wall of the right end of the base 21 and is located on the right side of the second roller frame 291, the height of the third roller frame 292 is less than the height of the second roller frame 291, the pair of guide rollers 293 are movably arranged on the second roller frame 291 and the third roller frame 292, and the pair of third hydraulic cylinders 294 are respectively arranged on the second roller frame 291 and the third roller frame 292. One end is movably connected to the front and rear side walls of the second roller frame 291, and the telescopic end of the third hydraulic cylinder 294 is tilted and movably connected to the front and rear side walls of the third roller frame 292; the third hydraulic cylinder 294 drives the third roller frame 292 to flip toward the second roller frame 291, so that the guide rollers 293 are relatively close to each other to clamp the steel rope 27, and the steel rope 27 is staggered through the two guide rollers 293 to achieve the twisting force locking. The guide rollers 293 are relatively close to each other through the third hydraulic cylinder 294, which is used to lock the steel rope 27 to maintain stability after lifting to a certain height.

[0023] As a further solution of the present invention, the bearing structure 3 includes a bearing seat 31, a plurality of conveying rollers 32, a first guide seat 33, a pair of second guide seats 34, a pair of first adapters 35 and a pair of second adapters 36; the bearing seat 31 is L-shaped, and a conveying groove is opened in the middle of the upper wall of one end of the bearing seat 31, and a plurality of conveying rollers 32 are respectively and equidistantly movably embedded in the conveying groove at one end of the bearing seat 31, and the upper wall of the conveying rollers 32 is located above one end of the bearing seat 31, one end of the first guide seat 33 is fixedly arranged on one end of the bearing seat 31, and the upper wall of the first guide seat 33 is an inclined wall surface, a pair of second guide seats 34 are respectively symmetrically arranged in the middle of the front and rear side walls of one end of the bearing seat 31, and the upper wall of the second guide seat 34 is an inclined wall surface, a pair of first adapters 35 and a pair of second adapters 36 The connecting parts 35 are movably arranged on the front and rear side walls of one end of the bearing seat 31, and the first adapter parts 35 are fixedly connected to the telescopic end of the second hydraulic cylinder 157; a pair of second adapter parts 36 are fixedly arranged on the left side wall of the other end of the bearing seat 31, and are symmetrically close to the front and rear ends, and the second adapter parts 36 are movably mounted on the two ends of the connecting rod 28; the connection between the first adapter part 35 and the second hydraulic cylinder 157 drives one end of the bearing seat 31 to rise and fall, and the connection between the second connecting part and the connecting rod 28 drives the other end of the bearing seat 31 to rise and fall, and the two can cooperate to control the overall maintenance of one end of the bearing seat 31 to rise and fall horizontally or tilt, and the conveying roller 32 facilitates the entry or removal of goods onto the bearing seat 31.

[0024] The detailed connection means are well-known in the art. The following mainly introduces the working principle and process. The specific work is as follows.

[0025] Step 1: Apply force to the vehicle body 11 in the main structure 1 through the handrail 13, so that the equipment can be moved with the help of the wheels 12, which can be used for adjusting the moving position of the equipment or transporting the goods after carrying them; Step 2: With the power supply of the battery body 26, the lifting assembly 15 and the retractable structure 2 in the device are controlled by the controller 14; by driving the extension and retraction of the first hydraulic cylinder 154, one of the pair of swing arms 152 is driven to flip on the base 151. Since the swing arms 152 are arranged in parallel, the hanger 153 is limited, so that the hanger 153 will not flip and drive it to adjust the height to a certain extent and the bearing structure 3 on the other end of the hanger 153 is extended to a certain distance; Step 3, through the extension and retraction of the second hydraulic cylinder 157 on the landing gear 156, one end of the bearing seat 31 is driven to rise and fall with the help of the first adapter 35, and the motor 25 on the base 21 in the retractable structure 2 is driven to drive the rope roller 23 to rotate on the first roller frame 22 with the help of the transmission of the gear box 24, so as to control the retraction and release of the steel rope 27. After the steel rope 27 crosses through the guide roller 293 in the locking unit 29, it is guided by the guide wheel 155 to pass through the rope hole 4 of the hanger 153 and connected to the other end of the bearing seat 31, so as to drive the other end of the bearing seat 31 to adjust and lift; due to the active connection between one end of the bearing seat 31 and the first adapter 35, and the active connection between the second adapter 36 and the suspension rod 28 at one end of the steel rope 27, both ends of the bearing seat 31 can be turned over, and then through the retraction and release of the steel rope 27 and the extension and retraction of the second hydraulic cylinder 157, the bearing seat 31 is regulated to be used for horizontal lifting or tilting lifting; Step 4, when the load is carried by the bearing seat 31 at a certain height for hovering, the locking unit 29 can be driven to lock and limit the steel rope 27; that is, the third hydraulic cylinder 294 is driven to extend and retract, driving the third roller frame 292 to flip, so that the guide roller 293 on the third roller frame 292 contacts the guide roller 293 on the second roller frame 291 to clamp the steel rope 27. Since the steel rope 27 crosses the two guide rollers 293 to realize the secondary reverse guide setting, the force of the steel rope 27 is locked on the guide roller 293 to keep it stable; Step 5, when the bearing seat 31 is used to load and unload heavier goods, the conveying roller 32 at one end of the bearing seat 31 is kept horizontal and raised to the height of the carriage, or extended into the carriage by turning over the swing arm 152; then the goods are poured onto one end of the bearing seat 31 by force, and the conveying roller 32 is used to push the goods so that one end of the goods is attached to the other end of the bearing seat 31, and then the steel rope 27 is driven to release and the second hydraulic cylinder 157 is contracted when the bearing seat 31 descends, so that the bearing seat 31 is turned over, and the goods can be kept in an upright state after unloading; Step 6. When the support seat 31 is used to stack smaller boxes of goods, the conveying roller 32 at one end is also kept horizontal, the goods are pushed onto the support seat 31 through the first guide seat 33 and swung with the help of the conveying roller 32, and then the support seat 31 is lowered horizontally to the right end of the vehicle body 11, and the stacked goods can be pushed out of the support seat 31 through the second guide seat 34.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A balanced lifting device for loading and unloading a vehicle, characterized in that: The invention comprises a main structure (1), a retractable structure (2) and a bearing structure (3); the retractable structure (2) is fixedly arranged on the main structure (1), the bearing structure (3) is fixedly arranged on the main structure (1), and the bearing structure (3) is connected to the retractable structure (2); the main structure (1) is used for bearing and moving, the retractable structure (2) is used for controlling the lifting and angle of the bearing structure (3), and the bearing structure (3) is used for bearing and transporting goods.

2. A balanced lifting device for loading and unloading a vehicle according to claim 1, characterized in that: The main structure (1) comprises a vehicle body (11), two pairs of wheels (12), a handrail frame (13), a controller (14) and a lifting assembly (15); The two pairs of wheels (12) are symmetrically arranged on the lower wall of the vehicle body (11) and located at the four corners, the handrail frame (13) is fixedly arranged on the left end of the vehicle body (11), the controller (14) is fixedly arranged on the handrail frame (13), and the lifting assembly (15) is fixedly arranged in the middle of the upper wall of the vehicle body (11).

3. A balanced lifting device for loading and unloading a vehicle according to claim 2, characterized in that: The lifting assembly (15) comprises a base (151), a pair of two pairs of swing arms (152), a hanger (153), a first hydraulic cylinder (154), three guide wheels (155), a landing gear (156), and a pair of second hydraulic cylinders (157); The base (151) is fixedly arranged at the middle of the upper wall of the vehicle body (11); one end of the two pairs of swing arms (152) are respectively arranged in parallel at the front and rear side walls of the base (151); the hanger (153) is L-shaped; one end of the hanger (153) is movably arranged between the other ends of the swing arms (152); a rope hole (4) is penetrated through the middle of the other end of the hanger (153); one end of the first hydraulic cylinder (154) is movably arranged on the right end of the base (151); and the telescopic end of the first hydraulic cylinder (154) is movably connected to one of the pairs of swing arms (152). Two guide wheels (155) are movably arranged on the upper and lower side walls of the other end of the hanger (153) and are respectively located on the left and right sides of the rope hole (4) in an alternating manner; another guide wheel (155) is movably arranged on the upper wall of the other end of the hanger (153) and is located at the left end; the landing gear (156) is fixedly arranged on the other end of the hanger (153), and the front and rear ends of the landing gear (156) are respectively located on the front and rear sides of the hanger (153) and are symmetrical; one end of a pair of second hydraulic cylinders (157) is respectively fixedly arranged on the lower walls of the front and rear ends of the landing gear (156).

4. A balanced lifting device for loading and unloading a vehicle according to claim 3, characterized in that: The retractable structure (2) comprises a base (21), a first roller frame (22), a rope roller (23), a gear box (24), a motor (25), a pair of battery bodies (26), a steel rope (27), a connecting rod (28) and a locking unit (29); The base (21) is fixedly arranged on the upper wall of the left end of the vehicle body (11); the first roller frame (22) is fixedly arranged in the middle of the upper wall of the left end of the base (21); the rope roller (23) is movably arranged on the first roller frame (22); the gear box (24) is fixedly arranged on the upper wall of the base (21) and is located in front of the first roller frame (22); the output end of the gear box (24) is connected to the rope roller (23); the motor (25) is fixedly arranged in front of the gear box (24); and the driving end of the motor (25) is connected to the input end of the gear box (24); a pair of the battery main body ( 26) are symmetrically arranged on the upper walls of the front and rear ends of the base (21), the locking unit (29) is fixedly arranged in the middle of the upper wall of the right end of the base (21), and the locking unit (29) corresponds to the first roller frame (22), one end of the steel rope (27) is connected to the rope roller (23), and the other end of the steel rope (27) movably passes through the upper walls of two guide wheels (155) and the rope hole (4), the steel rope (27) movably passes through the locking unit (29), and the middle part of the connecting rod (28) is fixedly arranged on the other end of the steel rope (27) and is located below the other end of the hanger (153).

5. A balanced lifting device for loading and unloading a vehicle according to claim 4, characterized in that: The locking unit (29) comprises a second roller frame (291), a third roller frame (292), a pair of guide rollers (293), and a pair of third hydraulic cylinders (294); The second roller frame (291) is fixedly arranged on the upper wall of the base (21) and is located on the right side of the first roller frame (22); the third roller frame (292) is movably arranged on the upper wall of the right end of the base (21) and is located on the right side of the second roller frame (291); the height of the third roller frame (292) is smaller than the height of the second roller frame (291); a pair of guide rollers (293) are movably arranged on the second roller frame (291) and the third roller frame (292), respectively; one end of a pair of third hydraulic cylinders (294) is movably connected to the front and rear side walls of the second roller frame (291), and the telescopic ends of the third hydraulic cylinders (294) are tilted and movably connected to the front and rear side walls of the third roller frame (292).

6. A balanced lifting device for loading and unloading a vehicle according to claim 5, characterized in that: The bearing structure (3) comprises a bearing seat (31), a plurality of conveying rollers (32), a first guide seat (33), a pair of second guide seats (34), a pair of first adapters (35) and a pair of second adapters (36); The bearing seat (31) is L-shaped, and a conveying groove is provided in the middle of the upper wall of one end of the bearing seat (31). A plurality of conveying rollers (32) are equidistantly and movably embedded in the conveying groove of one end of the bearing seat (31), and the upper wall of the conveying rollers (32) is located above one end of the bearing seat (31). One end of the first guide seat (33) is fixedly arranged on one end of the bearing seat (31), and the upper wall of the first guide seat (33) is an inclined wall surface. A pair of the second guide seats (34) are symmetrically arranged in front of one end of the bearing seat (31). The second guide seat (34) is located in the middle of the rear two side walls, and the upper wall of the second guide seat (34) is an inclined wall surface. A pair of the first adapters (35) are respectively movably arranged on the front and rear side walls of one end of the bearing seat (31), and the first adapters (35) are respectively fixedly connected to the telescopic end of the second hydraulic cylinder (157); a pair of the second adapters (36) are respectively fixedly arranged on the left side wall of the other end of the bearing seat (31), and are respectively symmetrically close to the front and rear ends, and the second adapters (36) are respectively movably mounted on the two ends of the connecting rod (28).

7. A balanced lifting device for loading and unloading a vehicle according to claim 6, characterized in that: The steel ropes (27) are staggered and passed between the guide rollers (293), so that the steel ropes (27) can be locked.

8. A balanced lifting device for loading and unloading a vehicle according to claim 7, characterized in that: The guide roller (293) is contracted and relatively fitted by a third hydraulic cylinder (294).

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