Cargo carrying type lifting equipment

Abstract

The invention relates to the technical field of loading and unloading equipment, in particular to cargo carrying type lifting equipment which comprises a mounting frame, a conveying platform and a lifting assembly used for driving the conveying platform to move are arranged on the mounting frame, and the lifting assembly comprises a rotating wheel arranged on the mounting frame and a lifting rope wound on the rotating wheel. One end of the lifting rope is fixed to the conveying platform, the other end of the lifting rope is fixed to the rotating wheel, a connecting shaft is rotationally connected to the mounting frame, the rotating wheel is fixed to the connecting shaft, and a driving motor and a linkage assembly used for connecting or separating an output shaft of the driving motor and the connecting shaft are arranged on the mounting frame. The method has the effect of saving resources.

Description

Technical Field

[0001] The present application relates to the technical field of cargo loading and unloading equipment, and in particular to a cargo lifting device. Background Art

[0002] A lifting loading and unloading platform refers to the process of transferring goods from high to low places through a lifting platform, making the handling of goods easier.

[0003] For example, the Chinese patent document with the announcement number CN218088839U discloses a gantry self-movable loading and unloading platform, including a gantry and a transport platform, a movable support seat is provided at the bottom of the gantry, guide rails are symmetrically provided on both sides of the gantry, a guide mechanism for fixing the transport platform is slidably connected in the guide rails, a driving mechanism for driving the guide mechanism to rise and fall is provided on the gantry, and the driving mechanism includes a winding wheel, and the winding wheel is provided with two groups, and the two groups of winding wheels are symmetrically arranged about the central axis of the gantry, and the two groups of winding wheels are connected by a gear chain mechanism, and a steel wire rope is connected between the winding wheel and the fixed frame, and a driving motor is provided on the gantry, and the output end of the driving motor is fixedly connected to one of the groups of winding wheels. The setting of the driving motor facilitates the power for the rotation of the winding wheel, and the winding wheel realizes the application of upward pulling force on both sides of the transport platform through the setting of the gear chain mechanism, thereby ensuring the smooth lifting and lowering of the transport platform.

[0004] In the above-mentioned related technologies, the wire rope is wound around the winding wheel by driving the driving motor to rotate. At this time, the transport platform will rise. When the transport platform needs to be lowered, the driving motor drives the winding wheel to rotate in the opposite direction. The purpose of raising and lowering the transport platform is achieved by the forward and reverse rotation of the driving motor. However, when the transport platform descends too far, the driving motor needs to rotate in the opposite direction all the time. At this time, the driving motor still needs electric energy to drive, which causes a certain amount of resource waste. At the same time, due to the increase in the number of working times of the driving motor, the service life of the driving motor will also be reduced. Summary of the invention

[0005] The present application provides a cargo lifting device, aiming to solve the problems of resource waste and reduced service life of the driving motor in the related technology.

[0006] The cargo lifting device provided in this application adopts the following technical solution: A cargo lifting device comprises a mounting frame, a conveying platform and a lifting component for driving the conveying platform to move, the lifting component comprises a rotating wheel arranged on the mounting frame and a lifting rope wound around the rotating wheel, one end of the lifting rope is fixed to the conveying platform, and the other end is fixed to the rotating wheel, the mounting frame is rotatably connected with a connecting shaft, the rotating wheel is fixed on the connecting shaft, the mounting frame is provided with a driving motor and a linkage component for connecting or separating the output shaft of the driving motor and the connecting shaft; the linkage component comprises a connecting rod slidably connected to the output shaft of the driving motor, a linkage cylinder fixed on the mounting frame, and a linkage plate fixed on the piston rod of the linkage cylinder, the connecting rod is rotatably connected to the linkage plate, the connecting shaft is provided with a linkage groove for inserting the connecting rod, and when the connecting rod is in the linkage groove, the driving motor drives the connecting shaft to rotate.

[0007] By adopting the above technical solution, after the cargo on the conveying platform is loaded and unloaded, the linkage cylinder drives the linkage plate to move, and the linkage plate drives the linkage rod to move when it moves, and finally the linkage rod is disengaged from the linkage groove. At this time, the output shaft and the connecting shaft of the drive motor are separated, and the conveying platform moves toward the ground under the action of gravity, so that the conveying platform can automatically descend without the drive motor working. On the one hand, it achieves the purpose of saving resources, and on the other hand, it can reduce the working times of the drive motor and increase the service life of the drive motor.

[0008] Optionally, a buffer device for slowing down the descent speed of the conveying platform is provided on the mounting frame; the buffer device includes a first damping mechanism and a second damping mechanism, the first damping mechanism is configured as a damper, one end of the damper is fixed on the mounting frame, and the other end is fixed on the conveying platform, and the second damping mechanism is used to adjust the descent speed of the conveying platform according to the weight of the conveying platform.

[0009] By adopting the above technical solution, under the action of the buffer device, when the conveying platform descends, the conveying platform can be made to descend more stably.

[0010] Optionally, the second damping mechanism includes a reversing assembly and a buffer assembly, the reversing assembly includes a one-way bearing arranged on the connecting shaft, a driving bevel gear fixed to the outer ring of the one-way bearing, and a driven bevel gear rotating on the mounting frame, the driving bevel gear and the driven bevel gear are meshed, and the buffer assembly is arranged on the driven bevel gear.

[0011] Optionally, the buffer assembly includes a buffer plate fixed on the mounting frame, an annular groove arranged on the buffer plate, and a first adjusting block and a second adjusting block sliding on the buffer plate; a buffer shaft and a buffer rod fixed on the buffer shaft are fixedly mounted on the driven bevel gear; a buffer block is slidably connected to the buffer rod; the buffer block is slidably connected in the annular groove; an arc-shaped buffer groove for sliding of the second adjusting block is provided on the buffer plate; a mounting frame is provided with a mounting shell; and an adjustment assembly for driving the first adjusting block and the second adjusting block to move in opposite directions is provided in the mounting shell.

[0012] By adopting the above technical solution, the positions of the first adjustment block and the second adjustment block can be adjusted to change the resistance of the buffer block during movement, and then the resistance of the buffer block during movement can be adjusted according to the weight of the goods on the conveying platform, so that the conveying platform can move more stably.

[0013] Optionally, a dividing block for separating the annular groove and the arc-shaped buffer groove is arranged between the first adjusting block and the second adjusting block, a gap is formed between the two adjacent first adjusting blocks, and a highest point is formed, the arc-shaped buffer groove is composed of two guide surfaces set at an angle, and a lowest point is formed in the arc-shaped buffer groove.

[0014] By adopting the above technical solution, during the sliding process, the buffer block passes through the highest point, guide surface and lowest point in the annular groove in turn, which will bring certain resistance to the rotation of the buffer shaft. By reducing the rotation speed of the buffer shaft, the rotation speed of the connecting shaft and the rotating disk fixed on the connecting shaft can be reduced, thereby playing a certain buffering role.

[0015] Optionally, a control assembly is arranged between the first adjustment block and the second adjustment block; the control assembly includes a control rod rotatably connected to the mounting shell, a first moving rod and a second moving rod slidably connected to the control rod, an end of the first moving rod away from the control rod is hinged to the first adjustment block, and an end of the second moving rod away from the control rod is hinged to the second adjustment block.

[0016] Optionally, the adjustment assembly includes an adjustment screw rotatably connected to the mounting shell, an adjustment disk slidably connected to the mounting shell, and a push rod fixed on the adjustment disk. The adjustment screw is passed through the adjustment disk and threadedly connected to the adjustment disk. A plurality of push rods are provided, and the lengths of the plurality of push rods become shorter successively along the circumference of the buffer disk.

[0017] By adopting the above technical solution, the adjusting screw drives the adjusting disk to move, and the longest push rod first contacts the corresponding first adjusting block, and then pushes the corresponding first adjusting block to move into the annular groove. At this time, the corresponding annular groove will be blocked, and the buffer block cannot slide from the corresponding position, thereby achieving the purpose of adjusting the moving path of the buffer block.

[0018] Optionally, a plurality of support springs are arranged on the buffer disk, and the plurality of support springs correspond to the plurality of second adjustment blocks one by one, and one end of the support spring is fixed on the second adjustment block, and the other end is fixed on the buffer disk.

[0019] By adopting the above technical solution, in the initial state, the support spring pushes the second adjustment block to block the buffer groove. At this time, the upper surface of the first adjustment block is flush with the bottom wall of the annular groove, and the buffer block can slide in the annular groove with minimal resistance.

[0020] In summary, this application has the following beneficial effects: When the output shaft and the connecting shaft of the driving motor are separated, the conveying platform moves towards the ground under the action of gravity, so that the conveying platform can automatically descend when the driving motor is not working. On the one hand, it can save resources, and on the other hand, it can reduce the working times of the driving motor and increase the service life of the driving motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0022] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0023] Figure 3 It is a schematic diagram of the rotating wheel and linkage groove structure of an embodiment of the present application.

[0024] Figure 4 It is a schematic diagram of the structure of the buffer device of an embodiment of the present application.

[0025] Figure 5 It is a schematic diagram of the structure of the second damping mechanism of an embodiment of the present application.

[0026] Figure 6 It is a schematic diagram of the structure of the buffer component of an embodiment of the present application.

[0027] Figure 7 It is a schematic diagram of the buffer disk structure of an embodiment of the present application.

[0028] Figure 8 It is a schematic diagram of the structure of the regulating component of an embodiment of the present application.

[0029] Fig. 9 It is a schematic diagram of the control component structure of an embodiment of the present application.

[0030] Figure numerals: 01, mounting frame; 02, conveying platform; 03, universal wheel; 04, driving motor; 05, mounting shell; 1, lifting assembly; 11, rotating wheel; 12, lifting rope; 13, connecting shaft; 2, linkage assembly; 21, linkage rod; 22, linkage cylinder; 23, linkage plate; 24, linkage groove; 3, first damping mechanism; 31, damper; 4, second damping mechanism; 41, reversing assembly; 411, one-way bearing; 412, driving bevel gear; 413, driven bevel gear; 42 , buffer assembly; 421, buffer disk; 422, first adjusting block; 423, second adjusting block; 424, buffer shaft; 425, buffer rod; 426, buffer block; 427, annular groove; 5, arc-shaped buffer groove; 51, guide surface; 52, partition block; 53, highest point; 54, lowest point; 6, adjustment assembly; 61, adjustment screw; 62, adjustment disk; 63, push rod; 7, control assembly; 71, control rod; 72, first moving rod; 73, second moving rod; 8, support spring. DETAILED DESCRIPTION

[0031] The following combination Figure 1-Figure 9 This application is described in further detail.

[0032] The present application embodiment discloses a cargo lifting device. Figure 1 and Figure 2 A cargo lifting device includes a mounting frame 01 arranged on the ground, a conveying platform 02 is slidably connected to the mounting frame 01, and a lifting component 1 is also arranged on the mounting frame 01. The conveying platform 02 is arranged horizontally. The lifting component 1 is used to drive the conveying platform 02 to move along the vertical direction on the mounting frame 01, thereby achieving the purpose of the conveying platform 02 driving the cargo to be lifted. At the same time, a universal wheel 03 is arranged on the mounting frame 01. The setting of the universal wheel 03 can drive the mounting frame 01 and the conveying platform 02 to move to the required positions, so that it is more convenient when used.

[0033] Reference Figures 1 to 3The lifting assembly 1 includes a rotating wheel 11 rotatably connected to the mounting frame 01 and a lifting rope 12 wound around the rotating wheel 11. One end of the lifting rope 12 is fixed to the conveying platform 02, and the other end is fixed to the rotating wheel 11. When the rotating wheel 11 rotates forward, the lifting rope 12 can be wound around the rotating wheel 11, and the conveying platform 02 is lifted. In this case, two rotating wheels 11 and two lifting ropes 12 are each provided, and a connecting shaft 13 is rotatably connected to the mounting frame 01. The two rotating wheels 11 are both fixed on the connecting shaft 13, and then the two rotating wheels 11 can be driven to rotate at the same time by rotating the connecting shaft 13, so that the conveying platform 02 is more stable when moving; in this embodiment, the rotating wheel 11 is arranged below the conveying platform 02, and a steering wheel is rotatably connected to the mounting frame 01, and the lifting rope 12 abuts against the steering wheel, and the lifting rope 12 can be steered.

[0034] Reference Figures 1 to 3 , a driving assembly is arranged on the mounting frame 01, and the driving assembly is used to drive the connecting shaft 13 to rotate. The driving assembly is set as a driving motor 04. In other embodiments, a reducer may also be arranged on the mounting frame 01, and the output shaft of the driving motor 04 is connected to the input shaft of the reducer, and the connecting shaft 13 is connected to the output shaft of the reducer, thereby achieving the purpose of deceleration. In this embodiment, the reducer is not arranged, and a linkage assembly 2 is arranged on the output shaft of the driving motor 04, and the linkage assembly 2 is used to connect or disconnect the output shaft of the driving motor 04 and the connecting shaft 13; when the connecting shaft 13 is connected to the output shaft of the driving motor 04, the rotation of the driving motor 04 can drive the connecting shaft 13 to rotate, and when the connecting shaft 13 is disconnected from the output shaft of the driving motor 04, the rotation of the driving motor 04 cannot drive the connecting shaft 13 to rotate.

[0035] Reference Figures 1 to 3 In this embodiment, during the rising process of the conveying platform 02, the driving motor 04 is connected to the connecting shaft 13. When the conveying platform 02 descends, the output shaft of the driving motor 04 and the connecting shaft 13 are disengaged. At this time, the conveying platform 02 automatically descends under the action of gravity. At this time, the driving motor 04 can stop working, thereby achieving the purpose of lowering the conveying platform 02 without using electric drive. On the one hand, it achieves the purpose of saving resources, and on the other hand, it can reduce the number of working times of the driving motor 04 and increase the service life of the driving motor 04.

[0036] Reference Figures 1 to 3The linkage assembly 2 includes a linkage rod 21 passed through the output shaft of the driving motor 04, a linkage cylinder 22 fixed on the mounting frame 01, and a linkage plate 23 fixed on the piston rod of the linkage cylinder 22. The linkage rod 21 is slidably connected to the output shaft of the driving motor 04, and the linkage rod 21 is rotatably connected to the linkage plate 23. At the same time, a linkage groove 24 for inserting the linkage rod 21 is opened on the connecting shaft 13. In this embodiment, the cross-sections of the linkage rod 21 and the linkage groove 24 are both set to hexagonal. In other implementations, the cross-sections of the linkage rod 21 and the linkage groove 24 can be set according to actual needs. In addition, a controller is provided on the mounting frame 01, and the controller is used to connect with the driving motor 04 and the linkage cylinder 22. When the conveying platform 02 rises to a specified height, the driving motor 04 stops working. After the cargo loading and unloading on the conveying platform 02 is completed, the linkage cylinder 22 drives the linkage plate 23 to move under the action of the controller. When the linkage plate 23 moves, it drives the linkage rod 21 to move, and finally the linkage rod 21 is disengaged from the linkage groove 24. At this time, the output shaft of the driving motor 04 and the connecting shaft 13 are separated, and the conveying platform 02 moves toward the ground under the action of gravity, thereby achieving the purpose of automatic descent of the conveying platform 02.

[0037] Reference Figure 1 , Figure 4 and Figure 5 A buffer device is arranged on the mounting frame 01, and the buffer device is used to slow down the descending speed of the conveying platform 02, so as to make the conveying platform 02 more stable when descending; the buffer device includes a first damping mechanism 3 and a second damping mechanism 4, and the first damping structure is configured as a damper 31, and the damper 31 is arranged below the conveying platform 02, one end of the damper 31 is fixed to the bottom surface of the conveying platform 02, and the other end is fixed to the mounting frame 01, under the action of the first damping mechanism 3 and the second damping mechanism 4, the conveying platform 02 is more stable when descending.

[0038] Reference Figures 5 to 7The second damping mechanism 4 includes a reversing component 41 and a buffer component 42. The reversing component 41 includes a one-way bearing 411 arranged on the connecting shaft 13, a driving bevel gear 412 fixed to the outer ring of the one-way bearing 411, and a driven bevel gear 413 rotating on the mounting frame 01. The driving bevel gear 412 and the driven bevel gear 413 are meshed, and the inner ring of the one-way bearing 411 is fixed on the connecting shaft 13. When the connecting shaft 13 drives the rotating wheel 11 to rotate and the conveying platform 02 rises, under the action of the one-way bearing 411, the driving bevel gear 412 will not be driven to rotate, and the driven bevel gear 413 will not rotate either; when the conveying platform 02 descends, the lifting rope 12 will be detached from the rotating wheel 11, and the rotating wheel 11 will be driven to rotate. During the rotation of the rotating wheel 11, the connecting shaft 13 will be driven to rotate. At this time, the connecting shaft 13 can drive the driving bevel gear 412 to rotate, and the driven bevel gear 413 is driven to rotate through the driving bevel gear 412.

[0039] Reference Figures 5 to 7 The buffer assembly 42 includes a buffer disk 421 fixed on the mounting frame 01, an annular groove 427 arranged on the buffer disk 421, and a first adjusting block 422 and a second adjusting block 423 sliding on the buffer disk 421. The axis of the buffer disk 421 is vertically arranged, and the first adjusting block 422 and the second adjusting block 423 are both arranged as an arc structure. At the same time, a buffer shaft 424 and a buffer rod 425 fixed on the buffer shaft 424 are fixedly installed on the driven bevel gear 413, and a buffer block 426 is slidably connected to the buffer rod 425, and the buffer block 426 is slidably connected in the annular groove 427.

[0040] Reference Figures 5 to 7 The first adjusting block 422 and the second adjusting block 423 are both provided on the buffer disk 421 in plurality, and the plurality of first adjusting blocks 422 and the second adjusting blocks 423 are evenly spaced along the circumference of the buffer disk 421 for one week, the first adjusting block 422 is in the annular groove 427, and slides along the depth of the annular groove 427, and an arc-shaped buffer groove 5 is provided on the buffer disk 421, and the arc-shaped buffer groove 5 is also provided along the depth direction of the annular groove 427, and the arc-shaped buffer groove 5 includes two guide surfaces 51 provided at an angle, and the second adjusting block 423 slides along the depth direction of the annular groove 427 The arc buffer groove 5 is slidably connected in the direction of degree. In this embodiment, the second adjusting block 423 and the arc buffer groove 5 have the same cross-section in the horizontal direction. The arc buffer groove 5 can be blocked by the second adjusting block 423. At the same time, the number of the first adjusting block 422 and the second adjusting block 423 is the same, and they correspond one to one. A dividing block 52 is arranged between the first adjusting block 422 and the second adjusting block 423. A support rod is fixedly installed on the dividing block 52, and the support rod is fixed on the mounting frame 01. The dividing block 52 is used to separate the annular groove 427 and the arc buffer groove 5.

[0041] Reference Figures 5 to 7, a gap is formed between two adjacent first adjustment blocks 422. In this embodiment, the gap between two adjacent first adjustment blocks 422 is defined as the highest point 53. Since the arc-shaped buffer groove 5 is composed of two guide surfaces 51 set at an angle, a lowest point 54 will be formed in the arc-shaped buffer groove 5 at this time; when the first adjustment block 422 extends into the annular groove 427, the corresponding second adjustment block 423 is flush with the bottom wall of the annular groove 427. At this time, the buffer block 426 can slide in the annular groove 427 and the arc-shaped buffer groove 5. During the sliding process, the buffer block 426 passes through the highest point 53, the guide surface 51 and the lowest point 54 in the annular groove 427 in turn, which will bring a certain resistance to the rotation of the buffer shaft 424. By reducing the rotation speed of the buffer shaft 424, the rotation speed of the connecting shaft 13 and the rotating wheel 11 fixed on the connecting shaft 13 can be reduced, thereby playing a certain buffering role.

[0042] Reference Figures 5 to 9 A mounting shell 05 is provided on the mounting frame 01, a buffer structure is provided in the mounting shell 05, and an adjustment component 6 is provided in the mounting shell 05. The adjustment component 6 is used to adjust the positions of the first adjustment block 422 and the second adjustment block 423, so that the number of the first adjustment block 422 extending into the annular groove 427 is different. At this time, it can be adjusted according to the weight of the goods on the conveying platform 02; the heavier the goods on the conveying platform 02, the greater the gravity it is subjected to when falling. At this time, the number of the first adjustment blocks 422 extending into the annular groove 427 can be increased, and the number of the second adjustment blocks 423 can be reduced, and the increased number and the reduced number are the same. Then, the lowest point 54 and the highest point 53 formed on the buffer plate 421 will also increase accordingly, thereby further reducing the rotation speed of the buffer shaft 424, so that the entire conveying platform 02 is more stable when descending.

[0043] Reference Figures 5 to 9 The adjusting assembly 6 includes an adjusting screw 61 rotatably connected to the mounting shell 05, an adjusting disk 62 slidably connected to the mounting shell 05, and a push rod 63 fixed to the adjusting disk 62. The adjusting screw 61 is inserted into the adjusting disk 62 and is threadedly connected to the adjusting disk 62. By rotating the adjusting screw 61, the adjusting disk 62 can be driven to slide in the vertical direction in the mounting shell 05. A plurality of push rods 63 are provided. A plurality of push rods 63 are provided along the circumference of the buffer disk 421, and the number of the plurality of push rods 63 is the same as the number of the plurality of first adjusting blocks 422. The push rod 63 is provided as an L-shaped structure, and the push rod 63 is slidably connected to the support rod. In addition, the lengths of the plurality of push rods 63 are shortened in sequence along the circumference of the buffer disk 421. At the same time, a control assembly 7 is provided between the first adjusting block 422 and the second adjusting block 423. Under the action of the control assembly 7, the corresponding first adjusting block 422 and the second adjusting block 423 can be moved in opposite directions.

[0044] Reference Figures 5 to 9 In order to facilitate the rotation of the adjusting screw 61, a motor is arranged on the mounting shell 05, and the output shaft of the motor is fixedly connected to the adjusting screw 61, and the adjusting screw 61 can be driven to rotate in the forward or reverse direction by the motor; a pressure sensor is arranged on the conveying platform 02, and the pressure sensor and the motor are both connected to the controller. When the pressure sensor detects that the pressure on the conveying platform 02 becomes larger, the motor drives the adjusting screw 61 to rotate, so that the pushing rod 63 moves toward the direction close to the buffer plate 421.

[0045] Reference Figures 5 to 9 The control assembly 7 includes a control rod 71 rotatably connected to the mounting shell 05, a first moving rod 72 and a second moving rod 73 slidably connected to the control rod 71, one end of the first moving rod 72 away from the control rod 71 is hinged on the first adjusting block 422, and one end of the second moving rod 73 away from the control rod 71 is hinged on the second adjusting block 423, and a plurality of support springs 8 are arranged on the buffer disk 421, and the plurality of support springs 8 correspond to the plurality of second adjusting blocks 423 one by one, one end of the support spring 8 is fixed on the second adjusting block 423, and the other end is fixed on the buffer disk 421. In the initial state, the support spring 8 pushes the second adjusting block 423 to block the arc buffer groove 5. At this time, the upper surface of the first adjusting block 422 is flush with the bottom wall of the annular groove 427, and the buffer block 426 can slide in the annular groove 427, and the resistance encountered by the buffer block 426 is minimal.

[0046] When it is necessary to adjust the descending speed of the conveying platform 02, the adjusting screw 61 is used to drive the adjusting disk 62 to move, and the longest push rod 63 first contacts the corresponding first adjusting block 422, and then pushes the corresponding first adjusting block 422 to move into the annular groove 427. At this time, the corresponding annular groove 427 will be blocked, and the buffer block 426 cannot move from the corresponding position. While the first adjusting block 422 moves, the second adjusting block 423 moves in the opposite direction, and the supporting spring 8 is compressed. By adjusting the position of the adjusting disk 62, all the first adjusting blocks 422 can be moved into the annular groove 427, and the second adjusting block 423 is disengaged from the arc-shaped buffer groove 5. At this time, the buffer block 426 encounters the greatest resistance when moving, and the conveying platform 02 descends the slowest.

[0047] The implementation principle of a cargo lifting device in an embodiment of the present application is as follows: when the conveying platform 02 needs to rise, the linkage cylinder 22 does not work, and the linkage rod 21 is in the linkage groove 24. At this time, the driving motor 04 rotates to drive the connecting shaft 13 to rotate. When the connecting shaft 13 rotates, it drives the rotating wheel 11 to rotate, so that the lifting rope 12 is wound around the rotating wheel 11. At this time, the conveying platform 02 will be driven to rise. While the connecting shaft 13 rotates, under the action of the one-way bearing 411, the active bevel gear 412 and the driven bevel gear 413 will not rotate; when the conveying platform 02 needs to descend, the linkage cylinder 22 drives the linkage plate 23 to move, and the linkage plate 23 drives the linkage rod 21 to disengage from the linkage groove 24. At this time, the conveying platform 02 will descend under the action of gravity. At this time, under the action of the lifting rope 12, the rotating wheel 11 and the connecting shaft 13 will be driven to rotate in the opposite direction, and buffered by the damper 31.

[0048] When the cargo on the conveying platform 02 is heavy and the buffering effect of the damper 31 is not good, the adjusting screw 61 is used to drive the adjusting disk 62 to move. During the movement of the adjusting disk 62, the pushing rod 63 is driven to move, and then the pushing rod 63 pushes the first adjusting block 422 to move into the annular groove 427. At the same time, under the action of the control component 7, the second adjusting block 423 is disengaged from the arc-shaped buffer groove 5. Then, when the conveying platform 02 descends, the buffer block 426 will decelerate under the action of the highest point 53, the lowest point 54 and the guide surface 51 to achieve the purpose of buffering, so that the drive motor 04 can stop working when the conveying platform 02 descends, thereby saving resources and improving the service life of the drive motor 04.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cargo lifting device, comprising a mounting frame (01), on which a conveying platform (02) and a lifting assembly (1) for driving the conveying platform (02) to move are arranged, characterized in that: The lifting assembly (1) comprises a rotating wheel (11) arranged on a mounting frame (01) and a lifting rope (12) wound around the rotating wheel (11); one end of the lifting rope (12) is fixed to the conveying platform (02) and the other end is fixed to the rotating wheel (11); a connecting shaft (13) is rotatably connected to the mounting frame (01); the rotating wheel (11) is fixed to the connecting shaft (13); a driving motor (04) and a coupling for connecting or disconnecting an output shaft of the driving motor (04) and the connecting shaft (13) are arranged on the mounting frame (01). The linkage assembly (2) comprises a linkage rod (21) slidably connected to the output shaft of the driving motor (04), a linkage cylinder (22) fixed to the mounting frame (01), and a linkage plate (23) fixed to the piston rod of the linkage cylinder (22); the linkage rod (21) is rotatably connected to the linkage plate (23); a linkage groove (24) for inserting the linkage rod (21) is provided on the connecting shaft (13); when the linkage rod (21) is in the linkage groove (24), the driving motor (04) drives the connecting shaft (13) to rotate.

2. A cargo lifting device according to claim 1, characterized in that: The mounting frame (01) is provided with a buffer device for slowing down the descending speed of the conveying platform (02); the buffer device comprises a first damping mechanism (3) and a second damping mechanism (4); the first damping mechanism (3) is configured as a damper (31); one end of the damper (31) is fixed to the mounting frame (01) and the other end is fixed to the conveying platform (02); the second damping mechanism (4) is used to adjust the descending speed of the conveying platform (02) according to the weight of the conveying platform (02).

3. A cargo lifting device according to claim 2, characterized in that: The second damping mechanism (4) comprises a reversing assembly (41) and a buffer assembly (42); the reversing assembly (41) comprises a one-way bearing (411) arranged on the connecting shaft (13), a driving bevel gear (412) fixed to the outer ring of the one-way bearing (411), and a driven bevel gear (413) rotating on the mounting frame (01); the driving bevel gear (412) and the driven bevel gear (413) are meshed, and the buffer assembly (42) is arranged on the driven bevel gear (413).

4. A cargo lifting device according to claim 3, characterized in that: The buffer assembly (42) comprises a buffer disk (421) fixed on the mounting frame (01), an annular groove (427) arranged on the buffer disk (421), and a first adjustment block (422) and a second adjustment block (423) sliding on the buffer disk (421); a buffer shaft (424) and a buffer rod (425) fixed on the buffer shaft (424) are fixedly mounted on the driven bevel gear (413); a buffer block (426) is slidably connected to the buffer rod (425); the buffer block (426) is slidably connected in the annular groove (427); an arc-shaped buffer groove (5) for sliding the second adjustment block (423) is provided on the buffer disk (421); a mounting shell (05) is provided on the mounting frame (01); an adjustment assembly (6) for driving the first adjustment block (422) and the second adjustment block (423) to move in opposite directions is provided in the mounting shell (05).

5. A cargo lifting device according to claim 4, characterized in that: A separation block (52) for separating the annular groove (427) and the arc-shaped buffer groove (5) is provided between the first adjustment block (422) and the second adjustment block (423); a gap is formed between two adjacent first adjustment blocks (422), and a highest point (53) is formed; the arc-shaped buffer groove (5) is composed of two guide surfaces (51) arranged at an angle, and a lowest point (54) is formed in the arc-shaped buffer groove (5).

6. A cargo lifting device according to claim 5, characterized in that: A control assembly (7) is arranged between the first adjustment block (422) and the second adjustment block (423); the control assembly (7) comprises a control rod (71) rotatably connected to the mounting shell (05), a first moving rod (72) and a second moving rod (73) slidably connected to the control rod (71), an end of the first moving rod (72) away from the control rod (71) being hinged to the first adjustment block (422), and an end of the second moving rod (73) away from the control rod (71) being hinged to the second adjustment block (423).

7. A cargo lifting device according to claim 6, characterized in that: The adjustment assembly (6) comprises an adjustment screw (61) rotatably connected to the mounting shell (05), an adjustment disk (62) slidably connected to the mounting shell (05), and a push rod (63) fixed to the adjustment disk (62); the adjustment screw (61) is passed through the adjustment disk (62) and is threadedly connected to the adjustment disk (62); a plurality of push rods (63) are provided, and the lengths of the plurality of push rods (63) are successively shortened along the circumference of the buffer disk (421).

8. The cargo lifting device according to claim 7, characterized in that: A plurality of support springs (8) are arranged on the buffer disk (421), and the plurality of support springs (8) correspond to the plurality of second adjustment blocks (423) in a one-to-one manner; one end of the support spring (8) is fixed to the second adjustment block (423), and the other end is fixed to the buffer disk (421).

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