Driving wheel load-adjustable AGV (Automatic Guided Vehicle)

Abstract

The utility model relates to a driving wheel load adjustable AGV trolley, and relates to the technical field of AGVs, the AGV trolley comprises a chassis frame, a lifting mechanism, two sets of supporting wheels and a supporting device located between the two sets of supporting wheels, and the supporting device comprises a support arranged on the chassis frame through a damping assembly; the driving wheel is rotationally arranged on the bracket; the adjusting mechanism is used for adjusting the position of the bracket and adjusting the supporting force of the driving wheel on the ground. During no-load, the adjusting mechanism drives the driving wheels to move upwards to reduce the supporting force and increase the supporting force of the two sets of supporting wheels to the ground, during loading, the adjusting mechanism is started to drive the driving wheels to move downwards to increase the supporting force to the ground, and the lifting mechanism lifts the loaded object, so that the heavy object can be supported; and the supporting wheels can be supported on the ground in the no-load state, the risk that the supporting wheels are separated from the ground is reduced, and therefore the stability of the trolley in the moving process is improved.

Description

Technical Field

[0001] This application relates to the technical field of AGV vehicles, and in particular to an AGV vehicle with adjustable drive wheel load. Background Technology

[0002] In industrial production, AGVs are widely used because they can achieve unmanned driving, ensuring that the system can automatically travel along a predetermined route without human guidance, and automatically transport goods or materials from the starting point to the destination. AGVs are also widely used due to their excellent flexibility, high degree of automation and high level of intelligence.

[0003] The AGV has two sets of support wheels spaced apart, with a drive wheel between them. To improve the stability of the AGV's movement, a flexible shock-absorbing structure is installed on the drive wheel for support. Although the shock-absorbing structure can improve the support effect when transporting loads, when the AGV is unloaded, the shock-absorbing structure can easily stretch and cause the support wheel to detach from the ground, thus greatly reducing the stability of the AGV's movement. Utility Model Content

[0004] To improve the stability of the AGV during movement, this application provides an AGV with adjustable drive wheel load.

[0005] This application provides an AGV (Automated Guided Vehicle) with adjustable drive wheel load, which adopts the following technical solution:

[0006] An adjustable-load AGV (Automated Guided Vehicle) includes a chassis frame, a lifting mechanism, two sets of support wheels, and a support device located between the two sets of support wheels. The support device includes:

[0007] The bracket is mounted on the chassis frame via shock-absorbing components;

[0008] The drive wheel is rotatably mounted on the bracket and presses against the ground to drive the bracket to move;

[0009] The adjustment mechanism is used to adjust the position of the support and to adjust the support force of the drive wheels on the ground.

[0010] By adopting the above technical solution, when unloaded, the adjustment mechanism drives the drive wheel and the bracket away from the ground, reducing the support force of the drive wheel on the ground and increasing the support force of the two sets of support wheels on the ground under the action of gravity. The rotation of the drive wheel drives the two sets of support wheels, the chassis frame, the lifting mechanism, and the support device to move to the load. The adjustment mechanism then drives the bracket and drive wheel closer to the ground, increasing the support force of the drive wheel on the ground under the action of the shock absorption components. Then, the lifting mechanism is activated to lift the load upward. The drive wheel can support and buffer the chassis frame under the action of the shock absorption components. Therefore, it can support the load when carrying heavy objects, and the support wheels can also be supported on the ground when unloaded, reducing the risk of the support wheels detaching from the ground, thereby improving the stability of the trolley when moving.

[0011] Optionally, the shock absorption assembly includes:

[0012] The shock-absorbing outer cylinder is mounted on the chassis frame;

[0013] The shock-absorbing inner cylinder is slidably mounted on the shock-absorbing outer cylinder, and the bracket is connected to the shock-absorbing inner cylinder;

[0014] A guide rod is mounted on the inner shock-absorbing cylinder and slides through the outer shock-absorbing cylinder; a positioning nut is threaded onto the guide rod.

[0015] A spring is sleeved on the guide rod and its two ends press against the outer and inner shock-absorbing cylinders. The spring is used to push the inner shock-absorbing cylinder to maintain a downward trend and to position the locating nut against the outer shock-absorbing cylinder for positioning.

[0016] By adopting the above technical solution, the guide rod provides guidance, the spring pushes the shock-absorbing inner cylinder, the bracket, and the drive wheel to maintain a downward trend, the adjustment mechanism drives the bracket and the shock-absorbing inner cylinder to move up and down, and the positioning nut prevents the guide rod and the shock-absorbing inner cylinder from disengaging from the shock-absorbing outer cylinder, thereby maintaining the stability of the trolley during operation. At the same time, the position of the positioning nut can be adjusted to adjust the position of the shock-absorbing inner cylinder, the bracket, and the drive wheel, thereby increasing the adaptability of the drive wheel during operation and further improving the stability of the trolley during operation.

[0017] Optionally, the adjustment mechanism includes:

[0018] The outer cylinder is adjustable and is mounted on the chassis frame.

[0019] The inner cylinder is slidably mounted on the outer cylinder. The bracket is movably connected to the inner cylinder and the shock-absorbing component through a clearance component. The movement of the inner cylinder drives the bracket to rotate through the clearance component. When the drive wheel moves to perform shock absorption, it makes way through the clearance component.

[0020] Adjustment component, used to drive the vertical movement of the inner cylinder.

[0021] By adopting the above technical solution, the adjustment component drives the inner cylinder to move up and down. The up and down movement of the inner cylinder drives the bracket and drive wheel to rotate through the clearance component, thereby adjusting the position of the drive wheel. At the same time, when the bracket rotates to the limit of the clearance component, the up and down movement of the inner cylinder can also drive the shock-absorbing inner cylinder to move vertically. Meanwhile, the adjustment mechanism and the shock-absorbing component are located on both sides of the drive wheel, which can improve the support effect on the drive wheel, improve the stability of the drive wheel when it is supported, and improve the stability of the trolley when it moves.

[0022] When the shock absorber moves up and down to absorb shock, the clearance component can make way for the vertical movement of the shock absorber, reducing the adverse effects on the shock absorption effect. This allows the shock absorber to be adjusted in position while maintaining its shock absorption effect, further improving the stability of the trolley when it moves.

[0023] Optionally, the bracket has a horizontal clearance hole at one end near the adjusting inner cylinder, and the clearance component includes:

[0024] A rotating column is mounted on the shock-absorbing assembly, and the bracket is rotatably mounted on the rotating column.

[0025] The relief column is set on the adjusting inner cylinder and slidably installed on the relief hole.

[0026] By adopting the above technical solution, the adjustment of the inner cylinder up and down movement drives the relief column to move on the relief hole, thereby driving the bracket to rotate. The rotation of the bracket is used to adjust the position of the drive wheel. When the shock absorption component performs shock absorption, it drives the bracket, the rotating column and the relief column to rotate, thereby adjusting the position of the drive wheel without interfering with the up and down movement of the shock absorption component, thus further improving the stability of the trolley when moving.

[0027] Optionally, the adjustment component includes:

[0028] The adjusting screw is rotatably mounted on the adjusting outer cylinder;

[0029] The adjusting nut is mounted on the inner adjusting cylinder and threadedly connected to the adjusting screw.

[0030] The driving component is mounted on the adjusting outer cylinder and is used to drive the adjusting screw to rotate.

[0031] By adopting the above technical solution, the drive unit starts and drives the adjusting screw to rotate. The rotation of the adjusting screw drives the adjusting nut and the adjusting inner cylinder to move vertically. At the same time, since the adjusting mechanism and the shock absorption component are located on both sides of the drive wheel, the adjusting inner cylinder cannot rotate but can only move vertically, which improves the stability during the adjustment process and further improves the stability of the trolley when it moves.

[0032] Optionally, two shock-absorbing components are spaced apart, and the bracket is positioned at both ends on the bottom of the two shock-absorbing inner cylinders. The adjustment mechanism includes:

[0033] Two adjusting sleeves are rotatably mounted on the top of two shock-absorbing outer cylinders and respectively fitted onto the positioning nuts located on the two guide rods. The rotation of the adjusting sleeves drives the positioning nuts to rotate and allows the positioning nuts to move vertically within the adjusting sleeves.

[0034] The drive assembly is used to drive the two adjusting sleeves to rotate simultaneously.

[0035] By adopting the above technical solution, there is only one shock absorber component, which results in poor stability and poor shock absorption effect when the shock absorber component absorbs shock on the drive wheel. In addition, the adjustment mechanism is prone to adverse effects on the shock absorber component during the adjustment process, especially when the adjustment range is large, causing phenomena such as jamming, which reduces the stability of the car during operation.

[0036] Two shock absorber components are provided on both sides of the drive wheel, which ensures that the support force on the drive wheel is balanced during shock absorption, greatly improving the shock absorption effect. When adjustment is needed, the drive component is activated to drive the two adjusting sleeves to rotate. The rotation of the two adjusting sleeves drives the two positioning nuts to rotate, causing the guide rod, the inner shock absorber cylinder, the bracket, and the drive wheel to move vertically simultaneously. The spring ensures that the positioning nuts continue to press against the outer shock absorber cylinder, meaning that the position of the positioning nuts does not change. This allows for a wide range of adjustment of the positioning nuts without requiring a large length of adjusting sleeve, improving the stability during shock absorption and the stability of the trolley during operation.

[0037] Optionally, the driving component includes:

[0038] Two gears are respectively mounted on two adjusting sleeves;

[0039] Two racks are slidably mounted on the chassis frame and mesh with two gears respectively;

[0040] The moving part is connected to two racks respectively and is used to drive the two racks to move closer or further apart.

[0041] By adopting the above technical solution, the driving component drives the two racks to move closer or further apart from each other, and the two racks drive the two gears and the two adjusting sleeves to rotate simultaneously, thereby driving the two adjusting sleeves to rotate.

[0042] Optionally, the chassis frame is provided with a gravity adjustment mechanism, the gravity adjustment mechanism comprising:

[0043] Two gravity blocks are slidably mounted on the chassis frame and positioned between the two sets of support wheels, either close to or away from the support wheels.

[0044] The linkage component, mounted on the gravity block and connected to the two racks, enables the two gravity blocks to move away from the two sets of support wheels and reduce the pressure on the support wheels when the drive wheel moves down close to the ground, or to move the two gravity blocks closer to the two sets of support wheels and increase the pressure on the support wheels when the drive wheel moves up.

[0045] By adopting the above technical solution, when the two racks move to drive the two drive wheels vertically, the two racks drive the two gravity blocks to move closer to or away from the two sets of support wheels through the linkage component. When a load is required, the drive wheels move closer to the ground to increase the support force, while simultaneously driving the two gravity blocks away from the support wheels, thereby reducing the gravity on the support wheels. This allows the support wheels to be positioned against the ground under the weight of the load, reducing the risk of overloading the support wheels. When unloaded, the drive wheels move upward to reduce the support force, while simultaneously driving the two gravity blocks closer to the two sets of support wheels, thereby increasing the pressure of the gravity blocks on the two sets of support wheels. This allows the two sets of support wheels to be better pressed against the ground, reducing the risk of the support wheels detaching from the ground due to excessive gravity, thus further improving the stability of the trolley during operation.

[0046] At the same time, the drive wheel and gravity block move simultaneously through the linkage components, which can save energy and improve the synchronization of the drive wheel and gravity block when they move, further ensuring the stability of the car during operation.

[0047] Optionally, the linkage component includes:

[0048] A connecting rod is mounted on the rack and extends to one side of the gravity block, and has a connecting hole that passes through the upper and lower surfaces.

[0049] A connecting block is mounted on the gravity block and snapped onto the connecting hole. The movement of the rack drives the connecting block and the gravity block to move simultaneously via the connecting rod.

[0050] By adopting the above technical solution, the rack moves to drive the connecting rod, the connecting rod moves to drive the connecting block, and the connecting block moves to drive the gravity block, thereby realizing the simultaneous movement of the gravity block and the drive wheel. Moreover, the connecting block is engaged with the connecting hole, so that when the gravity block presses against the support wheel under the action of gravity, the force exerted by the connecting block on the gravity block is small or even almost non-existent, thereby further reducing the adverse effects of the connecting block on the gravity block when it is used for counterweighting, and improving the stability of the trolley during operation.

[0051] Optionally, the lifting mechanism is equipped with a pressure detector electrically connected to the adjustment mechanism. The pressure detector is used to detect the pressure of the load, and the adjustment mechanism adjusts the pressure of the drive wheel on the ground according to the pressure magnitude.

[0052] By adopting the above technical solution, the pressure detector can greatly improve the timeliness and accuracy of the adjustment mechanism, and further improve the stability of the trolley during operation.

[0053] In summary, this application includes at least one of the following beneficial technical effects:

[0054] 1. When unloaded, the adjustment mechanism drives the drive wheel upward to reduce the support force and increase the support force of the two sets of support wheels on the ground. When loaded, the adjustment mechanism starts to drive the drive wheel downward to increase the support force on the ground, and the lifting mechanism lifts the load. Therefore, it can support heavy objects and also support the support wheels on the ground when unloaded, reducing the risk of the support wheels detaching from the ground and thus improving the stability of the trolley when moving.

[0055] 2. When damping is achieved by moving the damping component up and down, the clearance component can make way for the vertical movement of the damping component, reducing the adverse effects on the damping effect of the damping component. This allows the position of the damping component to be adjusted while ensuring the damping effect of the damping component, further improving the stability of the trolley when it moves.

[0056] 3. The drive assembly starts the two shock-absorbing inner cylinders and the drive wheel to move vertically simultaneously. The spring keeps the positioning nut pressed against the shock-absorbing outer cylinder, meaning the position of the positioning nut will not change. This allows the positioning nut to be adjusted over a wide range without requiring a large adjustment sleeve length, thus improving the stability of the trolley during operation. Attached Figure Description

[0057] Figure 1 This is a three-dimensional structural diagram of the AGV trolley embodiment one;

[0058] Figure 2 This is a structural schematic diagram of the support device in Embodiment 1 of the AGV trolley;

[0059] Figure 3 yes Figure 2 A cross-sectional schematic diagram of AA in the middle;

[0060] Figure 4 This is a three-dimensional structural diagram of the AGV trolley in Embodiment 2;

[0061] Figure 5 This is a cross-sectional schematic diagram of the support device in Embodiment 2 of the AGV trolley;

[0062] Figure 6 yes Figure 5 Enlarged diagram of section C;

[0063] Figure 7 yes Figure 4 Enlarged schematic diagram of section B.

[0064] Reference numerals: 1. Chassis frame; 11. Lifting mechanism; 12. Support wheel; 2. Support device; 21. Bracket; 22. Drive wheel; 23. Clearance hole; 3. Shock absorption assembly; 31. Shock absorption outer cylinder; 32. Shock absorption inner cylinder; 33. Guide rod; 34. Spring; 35. Positioning nut; 36. Mounting plate; 37. Mounting plate; 38. Mounting hole; 4. Adjustment mechanism; 41. Adjusting outer cylinder; 42. Adjusting inner cylinder; 43. Adjustment assembly; 44. Adjusting screw; 45. Adjusting nut; 46. Drive component; 5. Clearance assembly; 51. Rotating column; 52. Clearance column; 61. Adjusting sleeve; 62. Bearing; 7. Drive assembly; 71. Gear; 72. Rack; 73. Moving component; 8. Weight adjustment mechanism; 81. Gravity block; 82. Linkage assembly; 83. Connecting rod; 84. Connecting block; 85. Connecting hole. Detailed Implementation

[0065] The following provides a further detailed description of this application.

[0066] This application discloses an AGV trolley with adjustable drive wheel load.

[0067] Example 1

[0068] Reference Figure 1 The adjustable-load AGV includes a chassis frame 1, a lifting mechanism 11, two sets of support wheels 12, and a support device 2 located between the two sets of support wheels 12. When loaded, the support device 2 moves down to support the ground, thereby providing support and buffering for the load. When unloaded, the support device 2 moves up to reduce the support force on the ground, thereby increasing the support force of the support wheels 12 on the ground under gravity, reducing the probability of the support wheels 12 detaching from the ground during the movement of the AGV, and improving the stability of the AGV during operation.

[0069] Reference Figure 1 and Figure 2 Two support devices 2 are spaced apart along the width of the chassis frame 1. The support device 2 includes a bracket 21, a drive wheel 22 and an adjustment mechanism 4. The bracket 21 is mounted on the chassis frame 1 through a shock-absorbing component 3. The bracket 21 is arranged along the length of the chassis frame 1. The drive wheel 22 is rotatably mounted at the middle position of the bracket 21 and extends to the bottom of the bracket 21.

[0070] The bracket 21 is equipped with a drive motor for driving the drive wheel 22 to rotate. The drive wheel 22 is always pressed against the ground to drive the bracket 21 and the entire trolley to move. The lifting mechanism 11 is a scissor-type lifting platform. The above structures are all existing technologies and will not be described in detail here. Two sets of support wheels 12 are arranged at intervals along the length of the chassis frame 1, and two support wheels 12 are arranged at intervals along the width of the chassis frame 1.

[0071] Reference Figures 1-3The shock absorption assembly 3 and the adjustment mechanism 4 are located at both ends of the bracket 21. The shock absorption assembly 3 includes a shock absorption outer cylinder 31, a shock absorption inner cylinder 32, a guide rod 33, and a spring 34. The shock absorption outer cylinder 31 is fixedly installed on the chassis frame 1 and is set vertically downward. The inner wall of the shock absorption outer cylinder 31 and the side near the top of the shock absorption outer cylinder 31 are fixedly installed on the mounting plate 36. The shock absorption inner cylinder 32 is vertically slidably installed on the inner wall of the shock absorption outer cylinder 31 and is located below the mounting plate 36. The guide rod 33 is fixedly installed on the inner wall of the shock absorption inner cylinder 32 and slides vertically through the mounting plate 36. A positioning nut 35 is threadedly connected to the guide rod 33 and is located above the mounting plate 36. The spring 34 is sleeved on the guide rod 33 and its two ends press against the mounting plate 36 and the shock absorption inner cylinder 32. The spring 34 drives the positioning nut 35 to press against the upper surface of the mounting plate 36 for positioning.

[0072] The adjustment mechanism 4 includes an outer adjusting cylinder 41, an inner adjusting cylinder 42, and an adjustment assembly 43. The outer adjusting cylinder 41 is fixedly installed on the chassis frame 1 and is vertically downward. The inner wall of the outer adjusting cylinder 41 and the side near the top of the outer adjusting cylinder 41 are fixedly installed on the mounting plate 37. The inner adjusting cylinder 42 is vertically slidably installed on the inner wall of the outer adjusting cylinder 41 and is located below the mounting plate 37. The bracket 21 is movably connected to the inner adjusting cylinder 42 and the shock-absorbing inner cylinder 32 through the clearance assembly 5. When the inner adjusting cylinder 42 moves, it drives the bracket 21 to rotate through the clearance assembly 5. When the shock-absorbing inner cylinder 32 moves to perform shock absorption, it makes way through the clearance assembly 5.

[0073] Reference Figures 2-3 The clearance assembly 5 includes a rotating column 51 and a clearance column 52. The rotating column 51 is fixedly installed on the bottom of the shock-absorbing inner cylinder 32 and is in a horizontal state. One end of the bracket 21 is rotatably installed on the rotating column 51 and the other end is provided with a horizontal clearance hole 23. The clearance column 52 is fixedly installed on the bottom of the adjusting inner cylinder 42 and extends into the clearance hole 23. The diameter of the clearance column 52 is the same as the width of the clearance hole 23 and it can slide on the clearance hole 23.

[0074] The vertical movement of the inner cylinder 42 drives the clearance column 52 to move, the vertical movement of the clearance column 52 drives the bracket 21 to rotate, the rotation of the bracket 21 drives the drive wheel 22 to rotate, thereby realizing the adjustment of the position of the drive wheel 22; when the vertical movement of the drive wheel 22 drives the bracket 21 and the vertical movement of the inner cylinder 42, the bracket 21 rotates and the clearance column 52 moves on the clearance hole 23, thereby making clearance during shock absorption.

[0075] The adjusting assembly 43 is used to drive the adjusting inner cylinder 42 to move vertically. The adjusting assembly 43 includes an adjusting screw 44, an adjusting nut 45, and a driving component 46. The adjusting screw 44 is rotatably mounted on the lower surface of the mounting plate 37 and extends vertically downward into the adjusting inner cylinder 42. The adjusting nut 45 is fixedly mounted on the top of the adjusting inner cylinder 42 and threadedly connected to the adjusting screw 44. The driving component 46 is a motor or similar device. The driving component 46 is fixedly mounted on the upper surface of the mounting plate 37 and located inside the adjusting inner cylinder 42. The output shaft of the driving component 46 is connected to the adjusting screw 44. When the driving component 46 starts, it drives the adjusting screw 44 to rotate. The rotation of the adjusting screw 44 drives the adjusting nut 45 and the adjusting inner cylinder 42 to move vertically.

[0076] A control box for controlling the start and stop of the drive component 46 is fixedly installed on the chassis frame 1. A pressure detector is also fixedly installed on the lifting mechanism 11. The pressure detector is electrically connected to the control box. The pressure detector is used to detect the weight of the load and transmit the detection data to the control box. The control box controls the start and stop of the drive component 46 according to the weight data, thereby adjusting the position of the drive wheel 22 so that the position of the drive wheel 22 can adapt better and faster, improving the stability of the trolley during operation.

[0077] The working principle of this application embodiment is as follows:

[0078] When loaded, the drive unit 46 activates to drive the adjusting inner cylinder 42 to move downward, driving the support bracket 21 and the drive wheel 22 to rotate. This causes the drive wheel 22 to move downward, increasing the support force on the ground, thereby supporting the load. The spring 34 and the drive wheel 22 work together to support and buffer the load. When unloaded, the drive unit 46 activates to drive the adjusting inner cylinder 42 to move upward, causing the drive wheel 22 to move upward, reducing the support force on the ground. This allows the support wheel 12 to increase its support force on the ground under the action of gravity, reducing the probability of the support wheel 12 detaching from the ground and improving the stability of the trolley during operation.

[0079] Example 2

[0080] Reference Figures 4-6 The difference between this embodiment and embodiment 1 is that there are two shock-absorbing components 3 located at both ends of the bracket 21. The two ends of the bracket 21 are connected to two shock-absorbing inner cylinders 32. The adjustment mechanism 4 is set on the chassis frame 1 and is used to drive the positioning nuts 35 located on the two guide rods 33 to rotate. At the same time, the positioning nuts 35 are pressed against the mounting plate 36 under the action of the spring 34, thereby realizing the simultaneous vertical movement of the two shock-absorbing inner cylinders 32, the bracket 21 and the drive wheel 22.

[0081] The adjustment mechanism 4 includes two adjustment sleeves 61 and a drive assembly 7. A bearing 62 is snapped into and installed inside the shock-absorbing inner cylinder 32 and above the mounting plate 36. The outer wall of the adjustment sleeve 61 is rotatably mounted on the bearing 62. A vertical adjustment groove is opened inside the adjustment sleeve 61. The adjustment groove is snapped into and engaged with the positioning nut 35. At the same time, the positioning nut 35 can slide vertically on the adjustment groove. The rotation of the adjustment sleeve 61 drives the positioning nut 35 to rotate. At the same time, it can also apply upward force to remove the adjustment sleeve 61 and the bearing 62 for replacement.

[0082] The drive assembly 7 is used to drive the two adjusting sleeves 61 to rotate. The drive assembly 7 includes two gears 71, two racks 72 and a moving part 73. The two gears 71 are keyed to the outer walls of the two adjusting sleeves 61 respectively, and the gears 71 are located inside the shock-absorbing outer cylinder 31. The shock-absorbing outer cylinder 31 has a mounting hole 38 at the gear 71. The two racks 72 are horizontally slidably mounted on the chassis frame 1, and the two racks 72 pass through the mounting hole 38 and mesh with the gears 71. The sliding direction of the two racks 72 is parallel. The drive part 46 is a double-headed electric actuator or a double-headed cylinder. The drive part 46 is fixedly mounted on the chassis frame 1, and the two piston rods of the drive part 46 are respectively connected to the two racks 72, driving the two racks 72 to move closer or further away from each other, thereby driving the two adjusting sleeves 61 to rotate simultaneously and driving the two shock-absorbing inner cylinders 32 to move up or down simultaneously.

[0083] Reference Figure 1 , Figure 4 , Figure 7 The chassis frame 1 is equipped with a gravity adjustment mechanism 8, which includes two gravity blocks 81 and a linkage component 82. The two gravity blocks 81 are horizontally slidably installed on the chassis frame 1. The gravity blocks 81 slide in the direction of approaching or moving away from the support wheels 12. The two gravity blocks 81 are correspondingly arranged with the two sets of support wheels 12 and are located between the two sets of support wheels 12. The two gravity blocks 81 are located between the two support devices 2, that is, between the two drive wheels 22. At the same time, the gravity blocks 81 are located below the top plate of the scissor lift platform and are located outside the scissor lift platform.

[0084] Reference Figure 4 , Figure 5 , Figure 7 The linkage component 82 is mounted on the gravity block 81 and connected to the two racks 72. When the drive wheel 22 moves down close to the ground, the linkage component 82 drives the two gravity blocks 81 away from the two sets of support wheels 12, thereby reducing the pressure on the two sets of support wheels 12. Alternatively, when the drive wheel 22 moves up, the linkage component 82 drives the two gravity blocks 81 closer to the two sets of support wheels 12, thereby increasing the pressure on the two sets of support wheels 12.

[0085] The linkage component 82 includes a connecting rod 83 and a connecting block 84. The connecting rod 83 is fixedly installed on the side wall of the rack 72 near the gravity block 81, and the connecting rod 83 extends to the side of the gravity block 81. A connecting hole 85 is provided at the end of the connecting rod 83 near the gravity block 81, which passes through the upper and lower surfaces of the connecting rod 83. The rack 72 on both sides of the gravity block 81 is provided with a connecting rod 83. Two connecting blocks 84 are provided and fixedly installed on the opposite side walls of the gravity block 81, and the two connecting blocks 84 are respectively snapped into the two connecting holes 85. The movement of the rack 72 drives the connecting rod 83, the connecting block 84 and the gravity block 81 to move simultaneously. When the two gravity blocks 81 apply pressure to the two sets of support wheels 12 under the action of gravity, the connecting rod 83 will not interfere with the vertical pressure of the gravity block 81. At the same time, the gravity block 81 can be disassembled and moved vertically to separate from the connecting rod 83, which improves the convenience of disassembly.

[0086] The working principle of this application embodiment is as follows:

[0087] When loaded, the moving part 73 drives the two racks 72 to move. The two racks 72 and the two gears 71 work together to drive the two adjusting sleeves 61 to rotate, thereby driving the two shock-absorbing inner cylinders 32, the bracket 21 and the drive wheel 22 to move vertically. This causes the drive wheel 22 to move downward to increase the support force on the ground. At the same time, the movement of the two racks 72 drives the two gravity blocks 81 away from the support wheels 12, thereby reducing the pressure on the two sets of support wheels 12. When unloaded, the moving part 73 moves back, causing the two drive wheels 22 to move upward to reduce the support force on the ground. It also drives the two gravity blocks 81 to move closer to the two sets of support wheels 12, increasing the pressure of the two sets of support wheels 12 on the ground, thereby improving the stability of the trolley during operation.

[0088] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A drive wheel load adjustable AGV vehicle, characterized in that: The chassis frame (1), the lifting mechanism (11), two groups of support wheels (12), the support device (2) between the two groups of support wheels (12), the support device (2) comprises: The bracket (21) is provided on the chassis frame (1) by the damping assembly (3); The drive wheel (22) is rotatably provided on the bracket (21) and is pressed on the ground to drive the bracket (21) to move; The adjusting mechanism (4) is used for adjusting the position of the bracket (21) and adjusting the support force of the drive wheel (22) on the ground.

2. The load adjustable AGV trolley according to claim 1, characterized in that: The damping assembly (3) comprises: The damping outer cylinder (31) is provided on the chassis frame (1); The damping inner cylinder (32) is slidably provided on the damping outer cylinder (31), and the bracket (21) is connected with the damping inner cylinder (32); The guide rod (33) is provided on the damping inner cylinder (32) and slides through the damping outer cylinder (31), and the positioning nut (35) is threadedly connected on the guide rod (33); The spring (34) is sleeved on the guide rod (33) and is pressed on the damping outer cylinder (31) and the damping inner cylinder (32) at both ends, and the spring (34) is used for pushing the damping inner cylinder (32) to keep the downward tendency and making the positioning nut (35) abutting on the damping outer cylinder (31) to be positioned.

3. The load adjustable AGV trolley according to claim 1, characterized in that: The adjusting mechanism (4) comprises: The adjusting outer cylinder (41) is provided on the chassis frame (1); The adjusting inner cylinder (42) is slidably provided on the adjusting outer cylinder (41), and the bracket (21) is movably connected with the adjusting inner cylinder (42) and the damping assembly (3) through the accommodation assembly (5), the adjusting inner cylinder (42) moves to drive the bracket (21) to rotate through the accommodation assembly (5), and the drive wheel (22) moves to be damped through the accommodation assembly (5) to be accommodated; The adjusting assembly (43) is used for driving the adjusting inner cylinder (42) to move vertically.

4. The load adjustable AGV cart according to claim 3, wherein: The bracket (21) is provided with a horizontal accommodation hole (23) near one end of the adjusting inner cylinder (42), and the accommodation assembly (5) comprises: The rotating column (51) is provided on the damping assembly (3), and the bracket (21) is rotatably installed on the rotating column (51); The accommodation column (52) is provided on the adjusting inner cylinder (42) and is slidably installed in the accommodation hole (23).

5. The load adjustable AGV cart according to claim 3, wherein: The adjusting assembly (43) comprises: The adjusting screw rod (44) is rotatably installed on the adjusting outer cylinder (41); The adjusting nut (45) is provided on the adjusting inner cylinder (42) and is threadedly connected with the adjusting screw rod (44); The driving part (46) is provided on the adjusting outer cylinder (41) and is used for driving the adjusting screw rod (44) to rotate.

6. The load adjustable AGV cart of claim 2, wherein: The damping assembly (3) is provided at intervals, the bracket (21) is provided at both ends on the bottom of the two damping inner cylinders (32), and the adjusting mechanism (4) comprises: Two adjusting sleeves (61) are rotatably installed on the top ends of the two damping outer cylinders (31) respectively and are sleeved on the positioning nuts (35) of the two guide rods (33) respectively, the adjusting sleeve (61) drives the positioning nut (35) to rotate and makes the positioning nut (35) vertically movable in the adjusting sleeve (61). A driving assembly (7) is arranged for driving the two adjusting sleeves (61) to rotate simultaneously.

7. The load adjustable AGV cart of claim 6, wherein: The driving assembly (7) comprises: Two gears (71) arranged on the two adjusting sleeves (61) respectively; Two racks (72) slidingly arranged on the chassis frame (1) and engaged with the two gears (71) respectively; A moving member (73) connected with the two racks (72) and arranged for driving the two racks (72) to move towards or away from each other.

8. The load adjustable AGV cart according to claim 7, wherein: The chassis frame (1) is provided with a gravity adjusting mechanism (8) arranged for adjusting the gravity, the gravity adjusting mechanism (8) comprises: Two gravity blocks (81) slidingly arranged on the chassis frame (1) along the direction of approaching or moving away from the support wheels (12) and located between the two groups of support wheels (12); A linkage assembly (82) arranged on the gravity block (81) and connected with the two racks (72), so that when the driving wheel (22) moves down to approach the ground, the two gravity blocks (81) are driven to move away from the two groups of support wheels (12) by the linkage assembly (82) to reduce the pressure on the two groups of support wheels (12), or when the driving wheel (22) moves up, the two gravity blocks (81) are driven to approach the support wheels (12) by the linkage assembly (82) to increase the pressure on the two groups of support wheels (12).

9. The load adjustable AGV cart of claim 8, wherein: The linkage assembly (82) comprises: A connecting rod (83) arranged on the rack (72) and extending to one side of the gravity block (81) and provided with a connecting hole (85) penetrating through the upper and lower surfaces; A connecting block (84) arranged on the gravity block (81) and clamped on the connecting hole (85), the rack (72) moves through the connecting rod (83) to drive the connecting block (84) and the gravity block (81) to move simultaneously.

10. The load adjustable AGV cart of claim 1, wherein: The lifting mechanism (11) is provided with a pressure detector electrically connected with the adjusting mechanism (4), the pressure detector is arranged for detecting the pressure of the load, and the adjusting mechanism (4) adjusts the pressure of the driving wheel (22) on the ground according to the pressure.

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