CN219821615U

CN219821615U - AGV trolley with lifting auxiliary wheels

Info

Publication number: CN219821615U
Application number: CN202320243485.1U
Authority: CN
Inventors: 李武立; 何伟
Original assignee: Star Arrow Technology Co ltd
Current assignee: Star Arrow Technology Co ltd
Priority date: 2023-02-17
Filing date: 2023-02-17
Publication date: 2023-10-13
Anticipated expiration: 2033-02-17

Abstract

The utility model provides an AGV trolley with lifting auxiliary wheels, and belongs to the technical field of AGV trolleys. An AGV trolley with lifting auxiliary wheels comprises a frame, a telescopic sleeve, a sliding block, auxiliary wheels and a height adjusting assembly; according to the utility model, the telescopic sleeve is vertically arranged on the frame, the sliding block is arranged in the telescopic sleeve in a sliding manner, the bottom of the sliding block extends out of the telescopic sleeve and is provided with the auxiliary wheel, the height adjusting component is arranged on the frame, and the adjusting part of the height adjusting component is connected with the sliding block, so that a user can adjust the height of the auxiliary wheel through the height adjusting component, the auxiliary wheel can be lowered and grounded when auxiliary support is needed and the balance of the frame is maintained, and the auxiliary wheel can be lifted and lifted off the ground when the frame normally runs, thus the load of original wheels on the frame is reduced, the problem that the frame falls down when the frame is spliced is prevented, the splicing is more convenient, the auxiliary wheel is not required to be additionally arranged by virtue of auxiliary equipment, and the length of the frame is adjusted conveniently.

Description

AGV trolley with lifting auxiliary wheels

Technical Field

The utility model relates to the technical field of AGV trolleys, in particular to an AGV trolley with lifting auxiliary wheels.

Background

AGV dolly is as the transport carrier in the specific scene, can follow the orbit operation voluntarily, realizes simultaneously that the automation keeps away the barrier etc. carries the goods safety accuracy to appointed region, and the rate of utilization is higher.

At present, the existing AGV trolley comprises a frame and wheels, wherein the wheels are arranged at the two sides of the frame or in the middle of the end part of the frame, and the frame is driven to move through the wheels, so that articles carried on the frame are transported. However, in the actual running process, the weight of the articles carried on the frame changes, so that the burden of the wheels is increased, and the damage problem is easy to occur. In addition, for some carts with adjustable frame length, it is usually achieved by splicing the ends of a plurality of frames, where a single frame is often provided with only one set of wheels symmetrically disposed on two sides of the frame. However, for the structure that only a group of symmetrically arranged wheels are arranged on the frame, the problem that the frame inclines around the wheels during splicing is solved, the end parts of the two frames spliced with each other are difficult to align, continuous adjustment by means of lifting equipment or jacking equipment is needed, the operation is complex, the time consumption is long, the operation is also needed to be realized by means of other auxiliary equipment, the operation space is enough, and the adjustment of the length of the frame is not facilitated.

Disclosure of Invention

The AGV trolley with the lifting auxiliary wheels aims at solving the problems in the prior art, the AGV trolley with the lifting auxiliary wheels is provided with the telescopic sleeve at one end of the trolley frame, the sliding block is arranged in the telescopic sleeve, meanwhile, the auxiliary wheels are installed on the sliding block, the sliding block is connected with the height adjusting assembly, the sliding block is driven to slide in the telescopic sleeve through the height adjusting assembly, the height of the auxiliary wheels on the trolley frame is adjusted, the auxiliary wheels are lifted to be separated from the ground when the trolley is in normal operation, the auxiliary wheels are adjusted to be in a state of contacting the ground when the trolley frame is required to be supported in an auxiliary mode, the auxiliary wheels are supported to be in a state of contacting the ground when the trolley frame is required to be spliced, the auxiliary wheels are supported to the trolley frame through the auxiliary wheels and the trolley frame together, the stability of the trolley frame is maintained, the problem that the trolley frame is inclined around the trolley frame is solved, the end parts of the trolley frame are aligned with the adjacent two trolley frames when the trolley is convenient to assemble and disassemble, the trolley frame is convenient to splice, the trolley frame is free from the structure, the auxiliary wheels are required to be in an adjusting structure, the trolley frame is not required to occupy the operation space, and the external operation space is not easy to adjust.

The specific technical scheme is as follows:

an AGV cart with lift assist wheels having features comprising:

the vehicle frame is of a frame structure, and wheels are symmetrically arranged on two sides of one end of the vehicle frame;

the telescopic sleeve is arranged at the bottom of the frame along the vertical direction and is positioned at the other end of the frame;

the sliding block is arranged in the telescopic sleeve in a sliding manner, and the lower end of the sliding block extends out of the telescopic sleeve;

the auxiliary wheel is arranged below the sliding block and connected to one end of the sliding block extending out of the telescopic sleeve;

the height adjusting assembly is arranged on the frame, and an adjusting part of the height adjusting assembly extends into the telescopic sleeve and is connected with the sliding block.

The AGV trolley with the lifting auxiliary wheels, wherein the cross sections of the telescopic sleeves and the sliding blocks are all rectangular, and the adjusting parts of the height adjusting components are in threaded connection with the sliding blocks.

The AGV trolley with the lifting auxiliary wheels comprises a fixing plate and a screw rod, wherein the fixing plate is horizontally arranged on a frame, a rotating hole is formed in the fixing plate, a first limit is arranged in the rotating hole, the upper end of the screw rod penetrates through the rotating hole and is rotatably arranged in the rotating hole, a second limit corresponding to the first limit is arranged on the screw rod, the first limit is arranged on the upper portion of the second limit in the vertical direction, and meanwhile, the lower end of the screw rod is an adjusting portion in threaded connection with a sliding block.

The AGV trolley with the lifting auxiliary wheels comprises a rotating hole, wherein the rotating hole is a step hole, the hole diameter of the lower end of the rotating hole is larger than the hole diameter of the upper end of the rotating hole to form a step in the rotating hole, the step is first limit, the diameter of the cross section of the upper end of a screw rod is reduced stepwise to form a shaft shoulder, and the shaft shoulder is second limit.

The AGV trolley with the lifting auxiliary wheel is characterized in that a rotating bearing is arranged between the screw rod and the fixed plate, the rotating bearing is sleeved on the part with small cross section diameter at the upper end of the screw rod, the lower end of the inner ring of the rotary bearing abuts against the second limit, and when the screw rod is mounted on the fixed plate, the upper end of the outer ring of the rotary bearing abuts against the first limit.

The AGV trolley with the lifting auxiliary wheel further comprises a screwing nut, wherein the screwing nut is provided with a penetrating connecting hole, the upper end of the screw rod is inserted into the connecting hole of the screwing nut, a screw is arranged in the connecting hole and is in threaded locking with the upper end of the screw rod, and the connecting hole is a countersunk hole.

The AGV trolley with the lifting auxiliary wheels is characterized in that grooves are formed in the inner walls of the connecting holes, and key grooves corresponding to the grooves are formed in the outer walls of the upper ends of the screw rods.

The AGV trolley with the lifting auxiliary wheels comprises a frame, wherein a cover plate is arranged on the frame, the cover plate covers the fixed plate in the vertical direction, meanwhile, an operation hole corresponding to the screwing nut is formed in the cover plate, and the top surface of the screwing nut is lower than the upper surface of the cover plate or is flush with the upper surface of the cover plate.

The AGV trolley with the lifting auxiliary wheels, wherein the mounting plate is arranged at the bottom of the frame, and the telescopic sleeve is fixedly mounted on the mounting plate.

The AGV trolley with the lifting auxiliary wheels further comprises a protecting sleeve, wherein the protecting sleeve is arranged in a cylindrical mode, the protecting sleeve is sleeved outside the screw rod, and the protecting sleeve is fixed on the fixing plate or the frame.

The technical scheme has the positive effects that:

the AGV trolley with the lifting auxiliary wheels comprises a trolley body, wherein the trolley body is provided with a lifting auxiliary wheel, the lifting auxiliary wheel is arranged at one end of the trolley body, which is away from the trolley body, of the trolley body, a telescopic sleeve which is arranged along the vertical direction is arranged at one end of the trolley body, a sliding block is arranged in the telescopic sleeve, the trolley body is provided with the auxiliary wheels, the trolley body is provided with a height adjusting component, the adjusting part of the height adjusting component is connected with the sliding block, the sliding block is driven by the height adjusting component to move in the telescopic sleeve, the auxiliary wheels are adjusted to be vertical, when the trolley body normally operates, the auxiliary wheels can be lifted to a ground-leaving state, the trolley body is supported by the auxiliary wheels under the condition that the trolley body is heavy in load, the burden of the trolley body is reduced, in addition, the trolley body is supported by the auxiliary wheels, the trolley body can be respectively supported by the original wheels and the auxiliary wheels, the trolley body is supported by multiple points of the trolley body, the trolley body is prevented from inclining when the trolley body is spliced, the end part of the trolley body is stable, the trolley body is convenient to splice, the two trolley body which is required to be spliced can be aligned, the trolley body is self-carried by the adjusting structure, the trolley body is free from carrying the adjusting device to operate without the help of the auxiliary device, and the excessive external operation space.

Drawings

FIG. 1 is a block diagram of an embodiment of an AGV with lift assist wheels of the present utility model;

FIG. 2 is a schematic view showing the installation of the telescopic sleeve, the slider, the auxiliary wheel and the height adjusting assembly according to a preferred embodiment of the present utility model;

FIG. 3 is a sectional view of the telescopic sleeve, slider, auxiliary wheel and height adjustment assembly of a preferred embodiment of the present utility model;

FIG. 4 is a block diagram of a fixing plate according to a preferred embodiment of the present utility model;

fig. 5 is a block diagram of a screw according to a preferred embodiment of the present utility model.

In the accompanying drawings: 1. a frame; 11. a cover plate; 12. a mounting plate; 111. an operation hole; 2. a wheel; 3. a telescopic sleeve; 4. a slide block; 5. an auxiliary wheel; 6. a height adjustment assembly; 61. a fixing plate; 62. a screw rod; 63. screwing the nut; 64. a rotating bearing; 611. a rotation hole; 612. a first limit; 621. a second limit; 7. and (5) a protective sleeve.

Description of the embodiments

In order to make the technical means, the creation features, the achievement of the purposes and the effects of the present utility model easy to understand, the following embodiments specifically describe the technical solution provided by the present utility model with reference to fig. 1 to 5, but the following disclosure is not limited to the present utility model.

FIG. 1 is a block diagram of an embodiment of an AGV with lift assist wheels of the present utility model; FIG. 2 is a schematic view showing the installation of the telescopic sleeve, the slider, the auxiliary wheel and the height adjusting assembly according to a preferred embodiment of the present utility model; FIG. 3 is a sectional view of the telescopic sleeve, slider, auxiliary wheel and height adjustment assembly of a preferred embodiment of the present utility model. As shown in fig. 1, 2 and 3, the AGV trolley with lifting auxiliary wheels provided in this embodiment includes: frame 1, flexible cover 3, slider 4, auxiliary wheel 5 and high adjusting part 6 are installed auxiliary wheel 5 on frame 1 through flexible cover 3 and slider 4 to adjust the height of auxiliary wheel 5 through high adjusting part 6, thereby make auxiliary wheel 5 lifting leave the ground or descend contact ground, thereby maintain steady user demand when satisfying auxiliary stay and assembling.

Specifically, the frame 1 is of a frame structure, so that the dead weight of the vehicle is reduced, and the bearing capacity can be ensured. And, be provided with wheel 2 in the bilateral symmetry of the one end of frame 1, support frame 1 through wheel 2, satisfy frame 1 and remove the transportation demand.

Specifically, the bottom in frame 1 is installed along vertical direction to flexible cover 3 is located the one end that frame 1 deviates from and is provided with wheel 2, has guaranteed that the direction of arranging of the inner chamber of flexible cover 3 is vertical direction, for follow-up cooperation slider 4 realizes that auxiliary wheel 5 carries out the altitude in vertical direction and goes up and down to provide the condition. Simultaneously, also make telescopic cover 3 and wheel 2 be located the both ends of frame 1 respectively, for follow-up through wheel 2 and auxiliary wheel 5 realize the multiple spot support to frame 1, prevent that frame 1 from inclining, maintain the steady condition that provides of frame 1.

Specifically, the sliding block 4 is slidably arranged in the telescopic sleeve 3, that is, the sliding block 4 can move in the telescopic sleeve 3 along the vertical direction, so that the height of the sliding block 4 in the vertical direction is adjusted, at the moment, the sliding block 4 is guided through the height adjustment of the telescopic sleeve 3, and the moving stability of the sliding block 4 is maintained. And, the lower extreme of slider 4 extends outside the flexible cover 3, provides the structural basis for the installation of follow-up auxiliary wheel 5.

Specifically, the auxiliary wheel 5 is disposed below the sliding block 4, at this time, the fixing portion of the auxiliary wheel 5 is connected to one end of the sliding block 4 extending to the outside of the telescopic sleeve 3, so that the auxiliary wheel 5 and the sliding block 4 form an integral structure, that is, when the sliding block 4 moves up and down in the telescopic sleeve 3, the auxiliary wheel 5 can also move up and down in the vertical direction, thereby realizing the adjustment of the height of the auxiliary wheel 5 and meeting different use requirements.

In addition, set up high adjusting part 6 on frame 1, simultaneously, extend high adjusting part 6's adjusting part to in the flexible cover 3 and be connected with slider 4, even the user is when operating high adjusting part 6, high adjusting part 6's adjusting part can drive slider 4 and remove in flexible cover 3, thereby realize the regulation to auxiliary wheel 5 height, and realized frame 1 self from taking adjusting structure, the user need not to operate with the help of auxiliary assembly in addition, the operation is more convenient, and can not occupy too big operating space.

More specifically, the cross sections of the telescopic sleeve 3 and the sliding block 4 are all rectangular, namely the inner cavity of the telescopic sleeve 3 is a rectangular cavity, and the sliding block 4 is a rectangular block, so that a plurality of limiting surfaces are formed in the middle of the inner cavity of the sliding block 4 and the inner cavity of the telescopic sleeve 3, circumferential rotation of the sliding block 4 in the telescopic sleeve 3 is limited, the sliding block 4 can only slide in the telescopic sleeve 3 along the vertical direction, at the moment, the adjusting part of the height adjusting assembly 6 is in threaded connection with the sliding block 4, namely the sliding block 4 is driven to slide in the telescopic sleeve 3 through rotation of the adjusting part of the height adjusting assembly 6, and the use requirement is met.

FIG. 4 is a block diagram of a fixing plate according to a preferred embodiment of the present utility model; fig. 5 is a block diagram of a screw according to a preferred embodiment of the present utility model. As shown in fig. 1, 2 and 4 and 5, the height adjusting assembly 6 further includes a fixing plate 61 and a screw 62, and at this time, the fixing plate 61 is horizontally mounted on the frame 1, preferably, the fixing plate 61 is welded on the frame 1, so that the connection strength between the fixing plate 61 and the frame 1 is improved. Meanwhile, a rotating hole 611 is formed in the fixed plate 61, a first limit 612 is arranged in the rotating hole 611, the upper end of the screw rod 62 penetrates through the rotating hole 611 and is rotatably installed in the rotating hole 611, so that the screw rod 62 can rotate in the rotating hole 611, meanwhile, a second limit 621 corresponding to the first limit 612 is arranged on the screw rod 62, after the screw rod 62 is installed in the rotating hole 611, the first limit 612 in the rotating hole blocks the upper portion of the second limit 621 on the screw rod 62 in the vertical direction, the screw rod 62 is prevented from sliding upwards relative to the fixed plate 61, and then supporting force can be provided for the sliding block 4 through the screw rod 62, so that the auxiliary supporting requirement is met. Meanwhile, the lower end of the screw rod 62 is an adjusting part in threaded connection with the sliding block 4, namely, the lower end of the screw rod 62 is threaded and in threaded connection with the sliding block 4, namely, under the condition of rotating the screw rod 62, the screw rod 62 rotates relative to the sliding block 4, and at the moment, the sliding block 4 slides in the telescopic sleeve 3, so that the height of the auxiliary wheel 5 is adjusted. It should be noted that the structure of the screw rod 62 and the slide block 4 proposed in the present embodiment is mature in the prior art, and the widely applied structure of adjusting the slide block 4 of the screw rod 62, so that the specific structure and operation principle thereof are not described herein.

More specifically, the rotating hole 611 on the fixed plate 61 is a step hole, and the lower end hole diameter of the rotating hole 611 is set to be larger than the upper end hole diameter, namely, a step is formed in the rotating hole 611, at this time, the formed step is set to be a first limit 612, meanwhile, the cross section diameter of the upper end of the screw rod 62 is reduced stepwise to form a shaft shoulder, namely, the upper end of the screw rod 62 is a small head end, so that the screw rod is convenient to be matched with the screwing nut 63 for installation, at this time, the shaft shoulder is set to be a second limit 621, and the screw rod 62 can be prevented from sliding on the fixed plate 61 along the axial direction thereof through mutual limitation of the step and the shaft shoulder, thereby providing conditions for the rotation of the subsequent screw rod 62 to drive the sliding block 4.

More specifically, a rolling bearing 64 is disposed between the screw rod 62 and the fixed plate 61, at this time, the rolling bearing 64 is sleeved on a portion with a small cross-section diameter at the upper end of the screw rod 62, that is, the rolling bearing 64 is sleeved on a small end of the screw rod 62, and the lower end of the inner ring of the rolling bearing 64 abuts against the second limit 621, meanwhile, when the screw rod 62 is mounted on the fixed plate 61, the upper end of the outer ring of the rolling bearing 64 abuts against the first limit 612, that is, two ends of the rolling bearing 64 are limited by the first limit 612 and the second limit 621 respectively, so that the rolling bearing 64 can be used as an antifriction structure for the screw rod 62 to rotate on the fixed plate 61, the service life of the screw rod 62 can be prolonged, the limit requirements of the first limit 612 and the second limit 621 can be met, and the structural design is more reasonable.

More specifically, the screw nut 63 is further disposed at the upper end of the screw rod 62, at this time, the screw nut 63 is provided with a through connection hole, at the same time, the upper end of the screw rod 62 is inserted into the connection hole of the screw nut 63, and the outer edge of the screw nut 63 abuts against the fixing plate 61, in addition, a screw is disposed in the connection hole, the screw locks the upper end of the screw rod 62 and the screw nut 63 in a threaded manner, so that the screw nut 63 and the screw rod 62 are fixedly connected, a user can drive the screw rod 62 to rotate through the screw nut 63, the operation is more convenient, the screw nut 63 can prop against the fixing plate 61, the screw rod 62 is prevented from falling down in the vertical direction, the screw rod 62 can be prevented from rising through the first limit 612 and the second limit 621, and the screw rod 62 is prevented from falling through the screw nut 63, so that the fixing of the installation position of the screw rod 62 on the fixing plate 61 is limited, and conditions are provided for moving the slide block 4 relative to 1 for the subsequent rotation of the screw rod 62. Preferably, the connecting hole is a countersunk hole, so that the end part of the screw for connecting the screw rod 62 and the screwing nut 63 can be conveniently hidden in the screwing nut 63, the flatness of the top surface of the screwing nut 63 is ensured, and the subsequent screw is prevented from protruding out of the cover plate 11 to prevent stacking of objects on the cover plate 11, thereby providing a structural foundation.

More specifically, be provided with the recess on the downthehole wall of connecting hole, at this moment, set up the keyway that corresponds with the recess on the outer wall of the upper end of lead screw 62 to when installing lead screw 62 and screwing nut 63, can overlap recess and keyway in the radial of lead screw 62, simultaneously, pack into a connecting key in the integrated configuration that recess and keyway formed, prevented lead screw 62 and screwing nut 63 to appear relative pivoted problem, ensured that the user accessible screwing nut 63 controls lead screw 62 and rotates, the regulation reliability is higher.

More specifically, the frame 1 is further provided with a cover plate 11, and at this time, the cover plate 11 covers the fixing plate 61 in the vertical direction, that is, the cover plate 11 is used as a carrier plate of the frame 1, so that articles can be placed on the frame 1 conveniently. Meanwhile, the cover plate 11 is provided with the operation hole 111 corresponding to the screwing nut 63, so that a user can directly rotate the screwing nut 63 in the operation hole 111, and the adjustment is more convenient. And, the top surface of screw nut 63 is less than the upper surface of apron 11 or flush with the upper surface of apron 11, has effectively avoided screw nut 63 outstanding in the problem of the upper surface of apron 11, has guaranteed the planarization of apron 11 upper surface, makes things convenient for the placement of article on apron 11 in the follow-up transportation process.

More specifically, be provided with mounting panel 12 in the bottom of frame 1, at this moment, connect the framework of frame 1 bottom into a overall structure through mounting panel 12, promoted the structural strength of frame 1, bearing capacity is stronger, in addition, with flexible cover 3 fixed mounting on mounting panel 12, provide enough big installation carrier for flexible cover 3 promptly through mounting panel 12, guaranteed the reliability of flexible cover 3 installation.

More specifically, still overlap outside the lead screw 62 and be equipped with lag 7, at this moment, lag 7 is the tube-shape and arranges, simultaneously, is fixed in fixed plate 61 or frame 1 with lag 7 on, covers lead screw 62 through lag 7, realizes the protection to lead screw 62, avoids lead screw 62 direct exposure to the external problem of receiving the collision and making the screw thread deformation, structural design is more reasonable.

The AGV trolley with the lifting auxiliary wheels comprises a frame 1, a telescopic sleeve 3, a sliding block 4, the auxiliary wheels 5 and a height adjusting assembly 6; the telescopic sleeve 3 is vertically arranged on the frame 1, the sliding block 4 is arranged in the telescopic sleeve 3 in a sliding manner, the bottom of the sliding block 4 extends out of the telescopic sleeve 3 and is provided with the auxiliary wheel 5, the height adjusting component 6 is arranged on the frame 1, and the adjusting part of the height adjusting component is connected with the sliding block 4, so that the height of the auxiliary wheel 5 can be adjusted through the height adjusting component 6, the auxiliary wheel 5 can be lowered and grounded when auxiliary support is needed and the balance of the frame 1 is maintained, the auxiliary wheel 5 can be lifted and lifted off during normal operation, the burden of the original wheels 2 on the frame 1 can be reduced, the problem that the frame 1 falls down during splicing can be prevented, the splicing is more convenient, the self-contained adjusting structure is not needed to be additionally installed by auxiliary equipment, the length of the frame 1 is not excessively occupied, and the length of the frame 1 is favorably adjusted.

The foregoing is merely illustrative of the preferred embodiments of the present utility model and is not intended to limit the embodiments and scope of the present utility model, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present utility model, and are intended to be included in the scope of the present utility model.

Claims

1. An AGV cart with lifting auxiliary wheels, comprising:

the height adjusting assembly is arranged on the frame, and the adjusting part of the height adjusting assembly extends into the telescopic sleeve and is connected with the sliding block.

2. The AGV trolley with lift assist wheel of claim 1 wherein the cross sections of the telescoping sleeve and the slider are all rectangular, and the adjustment portion of the height adjustment assembly is threaded with the slider.

3. The AGV trolley with the lifting auxiliary wheel according to claim 2 wherein the height adjusting assembly comprises a fixing plate and a screw rod, the fixing plate is horizontally mounted on the frame, a rotating hole is formed in the fixing plate, a first limit is arranged in the rotating hole, the upper end of the screw rod penetrates through the rotating hole and is rotatably mounted in the rotating hole, a second limit corresponding to the first limit is arranged on the screw rod, the first limit stops the upper portion of the second limit in the vertical direction, and meanwhile, the lower end of the screw rod is the adjusting portion in threaded connection with the sliding block.

4. The AGV trolley with the lift auxiliary wheel according to claim 3 wherein the rotation hole is a stepped hole, and a lower end hole diameter of the rotation hole is larger than an upper end hole diameter to form a step in the rotation hole, the step is the first limit, a cross-sectional diameter of an upper end of the screw rod is reduced stepwise to form a shoulder, and the shoulder is the second limit.

5. The AGV trolley with the lifting auxiliary wheel according to claim 4, wherein a rolling bearing is disposed between the screw rod and the fixing plate, the rolling bearing is sleeved on a portion of the upper end of the screw rod having a small cross-sectional diameter, the lower end of the inner ring of the rolling bearing abuts against the second limit, and the upper end of the outer ring of the rolling bearing abuts against the first limit when the screw rod is mounted on the fixing plate.

6. The AGV trolley with the lifting auxiliary wheel according to any one of claims 3 to 5, further comprising a screw nut provided with a through connection hole, wherein the upper end of the screw rod is inserted into the connection hole of the screw nut, wherein a screw is provided in the connection hole and is screwed with the upper end of the screw rod, and wherein the connection hole is a countersunk hole.

7. The AGV with lifting auxiliary wheels according to claim 6 wherein a groove is arranged on the inner wall of the connecting hole, and a key groove corresponding to the groove is arranged on the outer wall of the upper end of the screw rod.

8. The AGV trolley with the lifting auxiliary wheel according to claim 6, wherein a cover plate is provided on the frame, the cover plate covers the fixing plate in a vertical direction, and simultaneously, an operation hole corresponding to the screwing nut is formed in the cover plate, and the top surface of the screwing nut is lower than or flush with the upper surface of the cover plate.

9. The AGV trolley with lift assist wheel of claim 1 wherein the bottom of the frame is provided with a mounting plate and the telescoping sleeve is fixedly mounted on the mounting plate.

10. The AGV trolley with lift assist wheel as set forth in claim 3 further comprising a protective sleeve disposed in a tubular configuration, said protective sleeve being externally applied to said screw and said protective sleeve being secured to said fixed plate or said carriage.