Electric transport vehicle and load hanging device thereof

Abstract

The present invention discloses a load hanging device in the technical field of load hanging, comprising a traction rope, a conversion end, a hook and a winding component, wherein a reversing shaft is arranged inside the conversion end, and also comprises a gravity sensing structure arranged inside the conversion end; the gravity sensing structure comprises: a frame, connected with the conversion end through a positioning component; a top plate, located above the traction rope and fixedly connected with the frame; a movable part, located below the traction rope corresponding to the position of the top plate, and capable of clamping the traction rope together with the top plate through up and down displacement to lock the traction rope; a driving plate, which is elastically slidably connected with the frame laterally through an elastic part, the end of the traction rope is fixedly arranged at the end of the driving plate, and a vertical sliding groove is opened on the driving plate; a connecting plate; which can clamp the traction rope, thereby preventing the hook from rising, causing the center of gravity of the device to rise, and increasing the risk of rollover; in addition, the device automatically locks, which reduces the difficulty of operation, thereby reducing the use cost of the transport vehicle.

Description

Technical Field

[0001] The invention relates to the technical field of load hanging, in particular to an electric transport vehicle and a load hanging device thereof. Background Art

[0002] Electric transport trucks are widely used in life due to their convenience. However, due to the distance of transportation and uncontrollable load changes, electric transport trucks also have more transportation risks.

[0003] For example, in traditional fishing operations, electric transport trucks are often used to lift the catch from the bottom of the pond to the loading truck on the shore. In this process, due to the long lifting distance and the large and uncontrollable load changes of the fish loading frame, the driving parts of the hanging part are prone to slipping during the lifting process, causing the lifted loading frame to fall or swing down, injuring surrounding workers. Summary of the invention

[0004] The technical problem of the present invention is to provide an electric transport vehicle and its load hanging device, which can clamp the traction rope to prevent the hook from rising, causing the center of gravity of the device to increase and increase the risk of rollover; in addition, the device automatically locks, reducing the difficulty of operation and thereby reducing the cost of using the transport vehicle.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a load hanging device, comprising a traction rope, a conversion end, a hook and a winding assembly, wherein a reversing shaft is arranged inside the conversion end, and further comprising a gravity sensing structure arranged inside the conversion end; one end of the traction rope is fixedly connected to the gravity sensing structure, and the other end of the traction rope is connected to the winding assembly by bypassing the reversing shaft, and the hook is arranged on the traction rope between the reversing shaft and the gravity sensing structure, and is used to hang goods and realize the hanging by winding the traction rope by the winding assembly; the gravity sensing structure comprises:

[0006] The frame is connected to the conversion end through the positioning assembly, and the position of the frame can be adjusted horizontally;

[0007] A top plate, located above the traction rope and fixedly connected to the frame;

[0008] The movable part is located below the traction rope corresponding to the position of the top plate, and can cooperate with the top plate to clamp the traction rope and lock the traction rope by moving up and down;

[0009] The driving plate is elastically slidably connected to the frame laterally through an elastic member, the end of the traction rope is fixed to the end of the driving plate, and a vertical sliding groove is provided on the driving plate;

[0010] Connecting plate: the upper end is rotatably connected to the movable part, the middle part is rotatably connected to the frame, and the lower end is matched with the slide groove of the driving plate through the shaft;

[0011] When the object hung by the hook is overweight, the traction rope drives the driving plate to slide, and the driving plate drives the connecting plate to rotate around the rotation center in the middle of the connecting plate through the slide slot, so that the upper end of the connecting plate can lift the movable part, thereby cooperating with the top plate to clamp the traction rope and limit the hook from continuing to rise;

[0012] The guide is used for changing the direction of the traction rope and is rotatably arranged with the frame. It can be sleeved with the traction rope, rotate with the traction rope and remain perpendicular to the ground;

[0013] As a further solution of the present invention, a bayonet is installed at the end of the driving plate, and a limit assembly plugged with the bayonet is installed in the frame, and the limit assembly includes:

[0014] A wedge-shaped baffle plate is plugged into the bayonet pin;

[0015] The return spring is fixed at the bottom of the wedge-shaped baffle.

[0016] As a further solution of the present invention, the side wall of the wedge-shaped baffle is provided with a boss, a clamping spring is fixedly connected in the frame, the clamping spring is fixed with a clamping baffle, and the side wall of the clamping baffle is provided with a triggering protrusion and a clamping protrusion;

[0017] When the object hung by the hook is overweight, the driving plate moves horizontally, the latch pin passes over and presses down the wedge-shaped baffle, and the latching protrusion contacts the boss to limit the wedge-shaped baffle;

[0018] When the elastic member pushes the driving plate in the reverse direction, the baffle plate separates the clamping protrusion from the protrusion by triggering the protrusion, thereby realizing the reset of the wedge-shaped baffle plate.

[0019] As a further solution of the present invention, the frame is slidably connected with a vertical wedge block fixed with a return spring, a horizontal wedge block is horizontally slidably arranged in the frame, and a connecting telescopic rod is rotatably arranged between the horizontal wedge block and the guide;

[0020] When the boom angle changes, the guide rotates and drives the horizontal wedge block to move through the connected telescopic rod, changing the height of the vertical wedge block, so that the resistance of the wedge baffle to the bayonet pin changes, thereby adjusting the upper limit of the hanging device.

[0021] As a further solution of the present invention, the movable part comprises:

[0022] A bottom plate is rotatably arranged with the connecting plate, and the bottom plate is provided with an inclined slot arranged obliquely;

[0023] A movable plate, both sides of which are provided with sliding shafts that slide with the inclined groove;

[0024] A movable spring is fixed between the bottom plate and the movable plate;

[0025] When the movable plate contacts the traction rope, the movable plate moves along with the traction rope, and the inclined groove and the sliding shaft further raise the movable plate, thereby strengthening the fixation of the traction rope.

[0026] As a further solution of the present invention, the positioning component includes:

[0027] A slide rod passes through the conversion end and has limit plates at both ends;

[0028] The threaded rod is rotatably arranged with the conversion end head and threadably arranged with the frame, and an adjusting nut is fixedly arranged at the end thereof.

[0029] An electric transport vehicle, suitable for a load hanging device as described in any one of the above, comprises a vehicle body and a boom, the boom being arranged on the vehicle body, and is characterized in that: the conversion end is fixedly arranged on the free end of the boom, the winding assembly is fixed by attachment assemblies including but not limited to screws, mounting plates and other fixing assemblies, and is mainly used to fix the conversion end on the boom.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. In the present invention, the winding assembly retracts the traction rope and the hook rises accordingly. When the object hung by the hook is overweight, the end of the traction rope drives the driving plate to move, and the driving plate moves horizontally with the end of the traction rope. The driving plate drives the bottom of the connecting plate to move, and the connecting plate rotates and drives the movable part to rotate, so that the movable part approaches the top plate until the movable part and the top plate clamp the traction rope in the middle. After the traction rope is clamped, the winding assembly cannot continue to retract the traction rope, and the hook stops rising accordingly, thereby stopping the object lifting work, avoiding the weight of the lifted object exceeding the upper limit of the hanging device, causing the hanging device to tip over, causing personal injury or object damage, and increasing the use cost of the hanging device.

[0032] 2. In the present invention, when the suspended object is overweight, the movable part contacts the traction rope during the process of the winding assembly contracting the traction rope. When the traction rope contracts, a pulling force is applied to the movable part, causing the movable part to move closer to the top plate, thereby strengthening the clamping force of the movable part and the top plate on the traction rope frame, and the clamping force of the movable part and the top plate on the traction rope increases with the increase of the tension of the traction rope, which can ensure the stability of the clamping of the traction rope by the movable part and the top plate, and prevent the hook and the suspended object from rising further, thereby causing the hanging device to tip over. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the overall structure of the conversion terminal in the present invention;

[0036] Figure 3 It is a schematic diagram of the cross-sectional structure of the frame in the present invention;

[0037] Figure 4 It is a schematic diagram of the internal structure of the frame in the present invention;

[0038] Figure 5 It is a schematic diagram of the structure of the driving plate and its connection relationship in the present invention;

[0039] Figure 6 It is a schematic diagram of the threaded rod structure in the present invention;

[0040] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0041] 1. Conversion end; 21. Frame; 22. Top plate; 23. Movable part; 24. Connecting plate; 25. Driving plate; 26. Elastic part; 27. Guide; 31. Pin; 32. Wedge baffle; 33. Boss; 34. Return spring; 41. Snap spring; 42. Snap baffle; 43. Snap convex block; 44. Trigger convex block; 51. Vertical wedge block; 52. Horizontal wedge block; 53. Connecting telescopic rod; 61. Bottom plate; 62. Bevel groove; 63. Movable plate; 64. Sliding shaft; 65. Movable spring; 71. Sliding rod; 72. Threaded rod; 73. Adjusting nut; 8. Reversing shaft; 9. Traction rope. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] See also Figure 1-6 The present invention provides a technical solution: a load hanging device, comprising a traction rope 9, a conversion end 1, a hook and a winding assembly, wherein a reversing shaft 8 is arranged inside the conversion end 1, and a gravity sensing structure is arranged inside the conversion end 1; one end of the traction rope 9 is fixedly connected to the gravity sensing structure, and the other end of the traction rope 9 is connected to the winding assembly by bypassing the reversing shaft 8, and the hook is arranged on the traction rope 9 between the reversing shaft 8 and the gravity sensing structure, and is used to hang goods and realize the hanging by winding the traction rope 9 through the winding assembly; the gravity sensing structure comprises:

[0044] The frame 21 is connected to the conversion terminal 1 through a positioning assembly, and the position of the frame 21 can be adjusted horizontally;

[0045] A top plate 22, located above the traction rope 9 and fixedly connected to the frame 21;

[0046] The movable member 23 is located below the traction rope 9 corresponding to the position of the top plate 22, and can cooperate with the top plate 22 to clamp the traction rope 9 and lock the traction rope 9 by moving up and down;

[0047] The driving plate 25 is elastically slidably connected to the frame 21 in a transverse direction through an elastic member 26. The end of the traction rope 9 is fixed to the end of the driving plate 25, and a vertical sliding groove is provided on the driving plate 25.

[0048] Connecting plate 24: the upper end is rotatably connected to the movable member 23, the middle part is rotatably connected to the frame 21, and the lower end is matched with the slide groove of the driving plate 25 through the shaft;

[0049] When the object hung by the hook is overweight, the traction rope 9 drives the driving plate 25 to slide, and the driving plate 25 drives the connecting plate 24 to rotate around the rotation center of the middle part of the connecting plate 24 through the slide slot, so that the upper end of the connecting plate 24 can lift the movable part 23, thereby cooperating with the top plate 22 to clamp the traction rope 9 and limit the hook from continuing to rise;

[0050] The guide 27 is used for reversing the traction rope 9 and is rotatably arranged with the frame 21. It can be sleeved with the traction rope 9 and rotate with the traction rope 9 and remain perpendicular to the ground;

[0051] Before use, the gravity sensing structure is installed on the conversion end 1 through the positioning mechanism, and the end of the traction rope 9 passes through the reversing shaft 9 in the conversion end 1, and the hook is wound around the rope, and finally passes through the guide 27 and is fixed to the driving plate 25;

[0052] When in use, the items to be transported to the electric transport vehicle are hung on the hook, and the hook is raised by retracting the traction rope 9 through the winding assembly;

[0053] See also Figure 2 , Figure 3 , Figure 4When the hook hangs an object, the winding assembly contracts the traction rope 9, and the hook rises accordingly. The end of the traction rope 9 drives the driving plate 25 to move, and the driving plate 25 moves horizontally with the end of the traction rope 9. The driving plate 25 drives the bottom of the connecting plate 24 to move, and the connecting plate 24 rotates and drives the movable part 23 to rotate, so that the movable part 23 is close to the top plate 22. The heavier the load, the closer the movable part 23 is to the top plate 22. When the load is overweight, the movable part 23 and the top plate 22 clamp the traction rope 9 in the middle. After the traction rope 9 is clamped, the winding assembly cannot continue to retract. The traction rope 9 and the hook also stop rising, thereby stopping the lifting of the object, preventing the weight of the hoisted object from exceeding the upper limit of the hanging device, causing the hanging device to tip over, causing personal injury or damage to the object, and increasing the use cost of the hanging device. It should be noted that the actual clamping preload can be adjusted by controlling the elastic sliding coefficient between the driving plate 25 and the frame 21 (such as replacing the elastic connector or changing the winding method of the traction rope), and the clamping force of the movable part 23 and the top plate 22 of the present invention is related to the load, that is, the larger the load, the more stable the clamping. ;

[0054] After the movable part 23 and the top plate 22 clamp the traction rope 9, it is only necessary to release the traction rope 9 through the winding assembly to make the hook and the suspended object fall to the ground again, and the elastic part 26 pushes the driving plate 25 in the reverse direction, and the driving plate 25 drives the connecting plate 24 to move in the reverse direction, so that the movable part 23 rotates in the reverse direction. Figure 4 The movable part 23 is rotated counterclockwise, and the traction rope 9 is separated from the traction rope 9, and the traction rope 9 enters the reversing shaft 8, and the hook and the suspended object are lowered, so that the suspended object falls to the ground, and then the weight of the suspended object is reduced to the lifting weight range of the hanging device, and the lifting is performed again, and the gravity sensing structure works again;

[0055] In addition, when the suspended object is overweight, the movable part 23 contacts the traction rope 9 during the process of the winding assembly retracting the traction rope 9. When the traction rope 9 contracts, a pulling force is applied to the movable part 23, causing the movable part 23 to move closer to the top plate 22, thereby strengthening the clamping force of the movable part 23 and the top plate 22 on the traction rope 9. The clamping force of the movable part 23 and the top plate 22 on the traction rope 9 increases with the increase of the tension of the traction rope, which can ensure the stability of the clamping of the traction rope 9 by the movable part 23 and the top plate 22, and prevent the hook and the suspended object from rising further, which would cause the hanging device to tip over.

[0056] As a further solution of the present invention, a latch 31 is installed at the end of the driving plate 25, and a limit assembly plugged with the latch 31 is installed in the frame 21, and the limit assembly includes:

[0057] The wedge-shaped baffle 32 is slidably connected to the frame 21 and can be plugged and matched with the bayonet 31;

[0058] A return spring 34 is fixed to the bottom of the wedge-shaped baffle 32;

[0059] See also Figure 3 , Figure 4 , the return spring 34 pushes the wedge-shaped baffle plate 32 upward, so that the wedge-shaped baffle plate 32 is plugged into the bayonet pin 31. When the force applied by the suspended object on the end of the traction rope 9 overcomes the resistance of the elastic member 26 and the wedge-shaped baffle plate 32, the wedge-shaped baffle plate 32 drives the bayonet pin 31 to press down until it passes over the wedge-shaped baffle plate 32. The driving plate 25 quickly drives the movable member 23 to move through the connecting plate 24, thereby quickly clamping the traction rope 9, thereby reducing the height of the suspended object and increasing the risk of rollover.

[0060] As a further solution of the present invention, a boss 33 is provided on the side wall of the wedge-shaped baffle 32, a clamping spring 41 is fixedly connected in the frame 21, a clamping baffle 42 is fixedly provided on the clamping spring 41, and the clamping baffle 42 is slidably arranged with the frame 21 in a transverse direction, and a triggering protrusion 44 and a clamping protrusion 43 are provided on the side wall of the clamping baffle 42;

[0061] See also Figure 3 , Figure 4 When the object hung by the hook is overweight, the driving plate 25 moves horizontally. Figure 4 The locking pin 31 moves to the left, and the locking pin 31 passes over and presses down the wedge-shaped baffle 32. When the top of the wedge-shaped baffle 32 is flush with the bottom of the locking pin 31, the locking protrusion 43 contacts the boss 33 under the action of the locking spring 41, and the wedge-shaped baffle 32 is limited, thereby reducing the difficulty of the elastic member 26 to reset the drive plate 25;

[0062] When the driving plate 25 moves in the reverse direction, Figure 4 When moving to the right, after the latch pin 31 contacts the trigger protrusion 44, the trigger protrusion 44 drives the latch protrusion 43 to move through the latch baffle 42, so that the latch protrusion 43 is disengaged from the boss 33, and the reset spring 34 pushes the wedge-shaped baffle 32 upward and inserts it into the latch pin 31, so that the drive plate 25 is limited again, and the wedge-shaped baffle 32 is reset.

[0063] As a further solution of the present invention, the frame 21 is slidably connected with a vertical wedge block 51 fixed with the return spring 34, a horizontal wedge block 52 is horizontally slidably arranged in the frame 21, and a connecting telescopic rod 53 is rotatably arranged between the horizontal wedge block 52 and the guide 27;

[0064] See also Figure 3 , Figure 4 When the boom angle increases, the guide 27 rotates with the traction rope 9. Figure 4The horizontal wedge block 52 is driven to move by connecting the telescopic rod 53, and the horizontal wedge block 52 squeezes the vertical wedge block 51, and the vertical wedge block 51 rises, shortening the distance between the vertical wedge block 51 and the wedge baffle 32, compressing the reset spring 34, and increasing the resistance of the wedge baffle 32 to the latch 31, thereby increasing the upper limit of the hanging device, and vice versa. It should be noted that as the angle between the boom and the ground increases, the distance between the hook and the vehicle decreases, and the upper limit of the weight that the hanging device can lift increases; the lifting weight of the hanging device can be automatically adjusted, thereby improving the practicability of the device.

[0065] As a further solution of the present invention, the movable member 23 includes:

[0066] The bottom plate 61 is rotatably arranged with the connecting plate 24, and the bottom plate 61 is provided with an inclined slot 62;

[0067] A movable plate 63, both sides of the movable plate 63 are provided with sliding shafts 64 that slide with the inclined groove 62;

[0068] The movable spring 65 is fixed between the bottom plate 61 and the movable plate 63;

[0069] See also Figure 4 , Figure 5 When the movable plate 63 contacts the traction rope 9, the friction between the movable plate 63 and the traction rope 9 increases until the movable plate 63 moves with the traction rope 9, and the inclined groove 62 and the sliding shaft 64 further raise the movable plate 63, thereby strengthening the fixation of the traction rope 9.

[0070] As a further solution of the present invention, the positioning component includes:

[0071] The slide bar 71 passes through the conversion end 1 and has limit plates at both ends;

[0072] The threaded rod 72 is rotatably arranged with the conversion end 1 and threadedly arranged with the frame 21, and an adjusting nut 73 is fixedly arranged at the end thereof.

[0073] The position of the frame 21 can be adjusted by adjusting the nut 73, so that it can position the traction rope 9 at different positions, thereby improving the practicality of the device; in addition, it is only necessary to open two through holes in the conversion end 1 at the end of the existing boom to install the frame 21, which can be directly added to the existing technology to play a role in preventing overweight, thereby increasing the scope of application of the device.

[0074] An electric transport vehicle comprises a vehicle body and a boom, wherein the boom is arranged on the vehicle body, and is characterized in that a conversion end 1 is fixedly arranged on the free end of the boom, and a winding component is fixedly arranged on the boom through an attachment component including but not limited to screws, a mounting plate and other fixing components, which is mainly used to fix the conversion end 1 on the boom.

[0075] The gravity sensing structure is installed on the conversion terminal 1 at the end of the boom through the positioning mechanism, and the length and angle of the boom are adjusted to move the hook above the object to be lifted. The traction rope 9 is released through the winding assembly to lower the hook. After the hook is lowered to a suitable height, the object is hung on the hook. The winding assembly shrinks the traction rope 9 to raise the hook. The hanging device monitors the gravity of the suspended object in real time. When the object is affected by external factors and the tension at the hook increases, the hanging device locks the traction rope 9 to stop the object from rising, thereby preventing the electric transport vehicle from tipping over.

Claims

1. A load hanging device, comprising a traction rope (9), a conversion end (1), a hook and a winding assembly, characterized in that: The conversion end (1) is provided with a reversing shaft (8) inside, and also includes a gravity sensing structure arranged inside the conversion end (1); one end of the traction rope (9) is fixedly connected to the gravity sensing structure, and the other end of the traction rope (9) bypasses the reversing shaft (8) and is connected to the winding assembly; the hook is arranged on the traction rope (9) between the reversing shaft (8) and the gravity sensing structure, and is used to hang goods and realize the lifting by winding the traction rope (9) through the winding assembly; the gravity sensing structure includes: A frame (21) is connected to the conversion end (1) via a positioning assembly, and the position of the frame (21) can be adjusted horizontally; A top plate (22), located above the traction rope (9) and fixedly connected to the frame (21); The movable member (23) is located below the traction rope (9) corresponding to the position of the top plate (22), and can cooperate with the top plate (22) to clamp the traction rope (9) and lock the traction rope (9) by moving up and down; The driving plate (25) is elastically slidably connected to the frame (21) in a transverse manner through an elastic member (26), the end of the traction rope (9) is fixed to the end of the driving plate (25), and a vertical sliding groove is provided on the driving plate (25); Connecting plate (24): the upper end is rotatably connected to the movable member (23), the middle part is rotatably connected to the frame (21), and the lower end is matched with the slide groove of the driving plate (25) through the shaft; When the object hung by the hook is overweight, the traction rope (9) drives the driving plate (25) to slide, and the driving plate (25) drives the connecting plate (24) to rotate around the rotation center in the middle of the connecting plate (24) through the sliding groove, so that the upper end of the connecting plate (24) can lift the movable part (23), thereby cooperating with the top plate (22) to clamp the traction rope (9) and limit the hook from continuing to rise; The guide (27) is used for changing the direction of the traction rope (9) and is rotatably arranged with the frame (21). It can be sleeved with the traction rope (9), rotate with the traction rope (9) and remain vertical to the ground.

2. A load hanging device according to claim 1, characterized in that: A latch pin (31) is installed at the end of the driving plate (25), and a limit assembly plugged with the latch pin (31) is installed in the frame (21), wherein the limit assembly comprises: A wedge-shaped baffle (32) is slidably connected to the frame (21) and can be plugged into the bayonet (31); The return spring (34) is fixedly arranged at the bottom of the wedge-shaped baffle (32).

3. A load hanging device according to claim 2, characterized in that: The side wall of the wedge-shaped baffle (32) is provided with a boss (33); a clamping spring (41) is fixedly connected inside the frame (21); the clamping spring (41) is fixedly provided with a clamping baffle (42); the clamping baffle (42) and the frame (21) are arranged to slide transversely; and the side wall of the clamping baffle (42) is provided with a triggering protrusion (44) and a clamping protrusion (43); When the object hung by the hook is overweight, the driving plate (25) moves horizontally, the latch pin (31) passes over and presses down the wedge-shaped baffle (32), and the latching protrusion (43) contacts the boss (33), thereby limiting the position of the wedge-shaped baffle (32); When the elastic member (26) pushes the driving plate (25) in the reverse direction, the baffle plate triggers the protrusion (44), and the baffle plate separates the clamping protrusion (43) from the protrusion, thereby realizing the reset of the wedge-shaped baffle plate (32).

4. A load hanging device according to claim 1 or 3, characterized in that: The frame (21) is slidably connected to a vertical wedge block (51) fixed to a return spring (34); a horizontal wedge block (52) is horizontally slidably arranged in the frame (21); a connecting telescopic rod (53) is rotatably arranged between the horizontal wedge block (52) and the guide (27); When the boom angle changes, the guide (27) rotates and drives the horizontal wedge block (52) to move through the connecting telescopic rod (53), thereby changing the height of the vertical wedge block (51) and changing the resistance of the wedge baffle (32) to the latch (31), thereby adjusting the upper limit of the hanging device.

5. A load hanging device according to claim 4, characterized in that: The movable part (23) comprises: A bottom plate (61) is rotatably arranged with the connecting plate (24), and the bottom plate (61) is provided with an inclined slot (62) arranged obliquely; A movable plate (63), wherein both sides of the movable plate (63) are provided with sliding shafts (64) that are slidably arranged with the inclined groove (62); A movable spring (65) is fixedly arranged between the bottom plate (61) and the movable plate (63); When the movable plate (63) contacts the traction rope (9), the movable plate (63) moves along with the traction rope (9), and the inclined groove (62) and the sliding shaft (64) further raise the movable plate (63), thereby strengthening the fixation of the traction rope (9).

6. A load hanging device according to claim 5, characterized in that: The positioning component comprises: A slide bar (71) passes through the conversion end (1) and has limit plates at both ends; The threaded rod (72) is rotatably arranged with the conversion end (1) and threadably arranged with the frame (21), and an adjusting nut (73) is fixedly arranged at the end thereof.

7. An electric transport vehicle, suitable for a load hanging device according to any one of claims 1 to 6, comprising a vehicle body and a hanging arm, wherein the hanging arm is arranged on the vehicle body, and characterized in that: The conversion end head (1) is fixedly arranged on the free end of the boom, and the winding assembly is arranged on the boom via an attachment assembly.

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