Carrying vehicle

Abstract

The utility model discloses a carrier. The carrier comprises a chassis, a bearing platform and a lifting mechanism. The lifting mechanism is arranged between the bearing platform and the chassis and used for controlling the bearing platform to ascend and descend. The lifting mechanism comprises a first threaded part and a second threaded part, the first threaded part is rotationally connected with the chassis, the second threaded part is connected with the surface, facing the chassis, of the bearing platform, and the first threaded part and the second threaded part are arranged in a sleeving mode and are in threaded fit. Under the condition that the first threaded piece rotates relative to the chassis, the second threaded piece can drive the bearing platform to ascend and descend in the first direction. By the adoption of the lifting mechanism, the structure is simple, driving is achieved between the lifting mechanism and the bearing platform in a threaded face contact mode, the problems of shaking and deflection are not prone to occurring, and therefore the running stability of the carrier is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transportation equipment, in particular to a trolley. BACKGROUND

[0002] The trolley is a kind of transportation carrier for short-distance carrying goods, which is widely used in manufacturing, warehousing logistics, medical treatment, retail and other industries.

[0003] In the related art, in order to enable the trolley to realize the taking and placing function of goods, a liftable loading platform is arranged on the trolley, and the loading platform is controlled by a scissor type lifting mechanism. However, the scissor type lifting mechanism is usually stacked by a plurality of cross linkages, and the structure is relatively complex. During the movement of the trolley, the scissor type lifting mechanism is prone to shaking and deflection, thereby affecting the stability of the trolley operation. CONTENT OF THE UTILITY MODEL

[0004] The present application discloses a trolley to solve the problem of poor trolley operation stability caused by the shaking and deflection of the lifting mechanism in the related art.

[0005] In order to solve the above technical problems, the present application is implemented as follows:

[0006] The present application discloses a trolley, which comprises a chassis, a bearing platform and a lifting mechanism.

[0007] The bearing platform is arranged on the chassis, and the lifting mechanism is arranged between the bearing platform and the chassis and connected to the bearing platform and the chassis respectively.

[0008] The lifting mechanism comprises a first threaded member and a second threaded member, both of which are arranged in extension along a first direction. The first threaded member is rotationally connected to the chassis, and the second threaded member is connected to the surface of the bearing platform facing the chassis. The first threaded member and the second threaded member are mutually sleeved and threadedly matched.

[0009] When the first threaded member rotates relative to the chassis, the second threaded member drives the bearing platform to move up and down along the first direction.

[0010] The first direction is perpendicular to the disc surface of the chassis.

[0011] The technical solution adopted by the present application can achieve the following technical effects:

[0012] The carrying vehicle disclosed by the embodiment of the application improves the prior art, and the threaded cooperation between the first threaded part and the second threaded part can realize the lifting movement of the bearing platform. Since the lifting mechanism and the bearing platform are driven in contact with the threaded surface, the problems of shaking and deflection are less likely to occur, thereby improving the stability of the carrying vehicle in operation. Moreover, the lifting mechanism has a simple structure and does not need to occupy much installation space, thereby reducing the height of the carrying vehicle, making the application scenarios of the carrying vehicle more extensive, and improving the use flexibility of the carrying vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 An assembly structure schematic view of the chassis, the bearing platform, the lifting mechanism and the guide mechanism disclosed by the embodiment of the application is shown in the figure.

[0014] Figure 2 An assembly structure schematic view of the chassis, the lifting mechanism and the guide mechanism disclosed by the embodiment of the application is shown in the figure.

[0015] Figure 3 An assembly structure schematic view of the bearing platform and the second threaded part disclosed by the embodiment of the application is shown in the figure.

[0016] Figure 4 A side view of the bearing platform and the lifting mechanism disclosed by the embodiment of the application is shown in the figure.

[0017] Figure 5 A sectional view of the bearing platform and the lifting mechanism disclosed by the embodiment of the application is shown in the figure.

[0018] Figure 6 One of the structure schematic views of the carrying vehicle disclosed by the embodiment of the application is shown in the figure.

[0019] Figure 7 The other of the structure schematic views of the carrying vehicle disclosed by the embodiment of the application is shown in the figure.

[0020] Explanation of reference signs:

[0021] 100-chassis, 101-first direction, 110-chassis body, 120-first rudder wheel, 130-second rudder wheel, 140-third rudder wheel, 150-fourth rudder wheel, 160-floating beam,

[0022] 200-bearin platform,

[0023] 300-lifting mechanism, 310-first threaded part, 311-annular avoiding groove, 320-second threaded part, 330-driving source, 340-transmission assembly, 341-reducer, 342-bevel gear, 343-tooth ring, 350-bearing seat,

[0024] 400-guide mechanism, 410-sleeve, 420-sliding column,

[0025] 500 - housing. DETAILED DESCRIPTION

[0026] For the purposes of the present application, the technical solutions and advantages will be more apparent, the technical solutions of the present application will be clearly and completely described below in conjunction with the embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0027] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually a class, not limited to the number of objects, for example, the first object can be one or more.

[0028] The technical solutions disclosed in the various embodiments of the present application will be described in detail below in conjunction with the drawings.

[0029] Please refer to Figures 1 to 7 The embodiments of the present application disclose a carrier, which can include a chassis 100, a carrying platform 200 and a lifting mechanism 300. Among them, the chassis 100 is the basic part of the carrier, which is used to support the upper lifting mechanism 300, the carrying platform 200 and the guide mechanism 400, and realize the corresponding movement, steering function. The carrier can be AGV(Automated Guided Vehicle, automated guided vehicle), AGV refers to the equipment with electromagnetic or optical automatic guiding device, which can travel along the specified guide path, has safety protection and various transfer functions; in addition, the carrier can also execute the corresponding action through the remote control mode.

[0030] The carrying platform 200 is arranged above the chassis 100, which is mainly used to carry goods. In order to facilitate the taking and placing of goods, the carrying platform 200 can be designed to be liftable, specifically, the lifting mechanism 300 can be arranged between the carrying platform 200 and the chassis 100, and the lifting mechanism 300 is connected with the carrying platform 200 and the chassis 100 respectively, which can realize the lifting movement of the carrying platform 200.

[0031] As Figures 1 to 5As shown, the first direction 101 is defined as perpendicular to the disc surface of the chassis 100, and it is noted that the disc surface of the chassis 100 is the surface of the chassis 100 facing the bearing platform 200, and the disc surface of the chassis 100 can be approximately planar, and the disc surface is mainly used to support the upper lifting mechanism 300, the bearing platform 200 and the guide mechanism 400; considering that the bearing platform 200 is also parallel to the disc surface of the chassis 100 during actual installation, the first direction 101 can also be perpendicular to the bearing platform 200.

[0032] The specific structure of the lifting mechanism 300 in the first direction 101 is described as follows. The lifting mechanism 300 can include a first threaded member 310 and a second threaded member 320, both of which extend along the first direction 101. The first threaded member 310 and the second threaded member 320 are respectively provided with threaded structures, and the threaded structures also extend along the first direction 101. A rotating shaft, a sliding rail or the like can be arranged between the first threaded member 310 and the chassis 100 to achieve the rotating connection of the first threaded member 310 and the chassis 100. The second threaded member 320 is connected to the surface of the bearing platform 200 facing the chassis 100, and the specific connection mode can be adhesion, bolt connection, riveting, clamping or the like.

[0033] The first threaded member 310 and the second threaded member 320 are mutually sleeved and threadedly connected. With the chassis 100 as the reference, the relative rotation between the second threaded member 320 and the bearing platform 200 and the chassis 100 can be limited. In the case that the first threaded member 310 rotates relative to the chassis 100, the second threaded member 320 will rotate relative to the first threaded member 310. By using the threaded connection between the first threaded member 310 and the second threaded member 320, in the case that the screwing length of the first threaded member 310 and the second threaded member 320 changes, the second threaded member 320 can be lifted along the first direction 101, and the bearing platform 200 can be lifted and moved along the first direction 101. In this process, the first threaded member 310 and the second threaded member 320 are always in threaded surface contact, and the stability is good.

[0034] The relative rotation between the second threaded member 320, the bearing platform 200 and the chassis 100 is limited in the following manner: a guide mechanism 400 can be arranged between the bearing platform 200 and the chassis 100, the guide mechanism 400 can be arranged outside the lifting mechanism 300 and spaced apart from the lifting mechanism 300, the guide mechanism 400 can be arranged in extension along the first direction 101, and the two ends of the guide mechanism 400 along the first direction 101 are fixedly connected with the chassis 100 and the bearing platform 200 respectively. The guide mechanism 400 can specifically include an extension rod, a lifting slide rail or the like. By arranging the guide mechanism 400, on the one hand, the relative rotation between the second threaded member 320 and the bearing platform 200 and the chassis 100 can be limited, so that the second threaded member 320 can rotate relative to the first threaded member 310 and realize lifting; on the other hand, the guide mechanism 400 can enable the bearing platform 200 to stably lift in the first direction 101.

[0035] According to the above, the guide mechanism 400 can also play a limiting role to limit the relative rotation between the second threaded member 320 and the bearing platform 200 and the chassis 100. The carrier disclosed in the embodiments of the present application can include a limiting structure for limiting the relative rotation between the second threaded member 320 and the bearing platform 200 and the chassis 100. The limiting structure can be one or multiple. In the embodiment in which the limiting structure is multiple, specifically, multiple limiting structures can be arranged on the chassis 100, the limiting structures are arranged in extension along the first direction 101, and the multiple limiting structures are arranged in interval along the edges of the bearing platform 200 and are in contact with the edges of the bearing platform 200 respectively, so as to constrain the bearing platform 200 in a limiting space formed by the multiple limiting structures, so that the bearing platform 200 can only move in lifting along the first direction 101, and cannot rotate relative to the chassis 100. It should be noted that the guide mechanism 400 described above is essentially a specific limiting structure, and the limiting structure can also be other types of structures, which are not limited in the embodiments of the present application.

[0036] In order to ensure the stability of the bearing platform 200 during lifting, the setting position, extension length and other parameters of the first threaded member 310 and the second threaded member 320 can be selected according to the center of gravity of the bearing platform 200, so that the center of gravity of the bearing platform 200 always falls on the axis of the first threaded member 310 and the second threaded member 320, thereby avoiding the deflection of the bearing platform 200.

[0037] It can be known from the above that the trolley disclosed in the embodiments of the present application improves the related art, and the lifting mechanism 300 is adopted, and the driving is realized through the threaded surface contact between the lifting mechanism 300 and the bearing platform 200, so that the problems of shaking and deflection are less likely to occur, thereby improving the stability of the trolley operation. Moreover, the structure of the lifting mechanism 300 is simple, and a large installation space is not required, thereby reducing the height of the trolley, making the application scenarios of the trolley more extensive, and further improving the use flexibility of the trolley.

[0038] In an optional embodiment of the present application, the first threaded part 310 can be a lead screw, and the second threaded part 320 can be a nut. The lead screw is rotationally connected with the chassis 100, and the axial direction of the lead screw is parallel to the first direction 101. A rotating shaft, a slide rail or the like can be arranged between the lead screw and the chassis 100 to realize the rotational connection of the lead screw and the chassis 100. The end surface of the nut is fixedly connected with the surface of the bearing platform 200 facing the chassis 100. The specific connection manner can be bonding, riveting, clamping or the like. The nut is sleeved on the lead screw and threadedly cooperates with the lead screw to form a lead screw pair. The lead screw pair can be a ball screw pair, so that the friction resistance between the nut and the lead screw is smaller, and the service life is longer.

[0039] In the case that the lead screw rotates relative to the chassis 100, the nut will rotate relative to the lead screw. By the thread cooperation between the lead screw and the nut, in the case that the screwing length of the lead screw and the nut changes, the nut can be lifted along the first direction 101, and the bearing platform 200 is driven to move up and down along the first direction 101. In this process, the lead screw and the nut are always in threaded surface contact, and the stability is good.

[0040] In another optional embodiment of the present application, as shown in Figures 1 to 5 the first threaded part 310 can be a nut. A rotating shaft, a slide rail or the like can be arranged between the nut and the chassis 100 to realize the rotational connection of the nut and the chassis 100. The second threaded part 320 can be a lead screw, and the axial direction of the lead screw is parallel to the first direction 101. The end surface of the lead screw is fixedly connected with the surface of the bearing platform 200 facing the chassis 100. The specific connection manner can be bonding, riveting, clamping or the like. The nut is sleeved on the lead screw and threadedly cooperates with the lead screw to form a lead screw pair. In the case that the nut rotates relative to the chassis 100, the lead screw will rotate relative to the nut. By the thread cooperation between the lead screw and the nut, in the case that the screwing length of the lead screw and the nut changes, the lead screw can be lifted along the first direction 101, and the bearing platform 200 is driven to move up and down along the first direction 101.

[0041] In the scheme that the first threaded part 310 is a nut and the second threaded part 320 is a lead screw, in order to ensure that the nut can stably rotate, as shown in Figure 5As shown, the lifting mechanism 300 can further include a bearing seat 350 protrudingly arranged on the disc surface of the chassis 100, and the bearing seat 350 can be connected to the chassis 100 in a manner of welding, riveting, bolt connection, etc. The bearing seat 350 can be a ring structure, and the end surface of the nut facing the chassis 100 is provided with a ring-shaped avoiding groove 311, at least part of the bearing seat 350 extends into the ring-shaped avoiding groove 311 and is in sliding fit with the groove wall of the ring-shaped avoiding groove 311, so as to realize stable assembly of the nut and the bearing seat 350. A ball bearing can be arranged between the groove wall of the ring-shaped avoiding groove 311 and the bearing seat 350 to reduce the friction when the nut rotates. By arranging the ring-shaped avoiding groove 311, installation space can be provided for the bearing seat 350, so that the bearing seat 350 does not block the lead screw from extending into the nut, thereby ensuring that the lead screw and the nut have sufficient overlapping length, and further increasing the lifting stroke of the bearing platform 200.

[0042] Similarly, in the scheme that the first threaded part 310 is the lead screw and the second threaded part 320 is the nut, in order to ensure that the lead screw can rotate stably, the bearing seat 350 can also be used in cooperation with the lead screw, and the end surface of the lead screw facing the chassis 100 is provided with the above-mentioned ring-shaped avoiding groove 311, at least part of the bearing seat 350 extends into the ring-shaped avoiding groove 311 and is in sliding fit with the groove wall of the ring-shaped avoiding groove 311, so as to realize stable assembly of the lead screw and the bearing seat 350. A ball bearing can be arranged between the groove wall of the ring-shaped avoiding groove 311 and the bearing seat 350 to reduce the friction when the lead screw rotates.

[0043] Please continue to refer to Figure 5 , the bearing seat 350 is a ring structure, and the bearing seat 350 includes an inner ring surface and an outer ring surface, and a ball bearing is arranged between the outer ring surface and the groove wall of the ring-shaped avoiding groove 311. By arranging the ball bearing, the friction between the bearing seat 350 and the nut or the lead screw can be reduced, which is beneficial to improve the service life. In the scheme that the first threaded part 310 is the nut and the second threaded part 320 is the lead screw, the inner ring surface of the bearing seat 350 can be in sliding fit with the lead screw, that is, the lead screw is in sliding fit with the inner ring surface of the bearing seat 350 while cooperating with the nut, thereby improving the stability of the installation of the lead screw and the bearing platform 200.

[0044] As shown in Figures 1 to 5 , the lifting mechanism 300 can further include a driving source 330 and a transmission assembly 340. The driving source 330 can be a motor, a rotary cylinder, etc., and the driving source 330 is connected to the chassis 100. The transmission assembly 340 can be a connecting rod, a transmission chain, a transmission belt, etc., the power input end of the transmission assembly 340 is connected to the output end of the driving source 330, and the power output end of the transmission assembly 340 is connected to the first threaded part 310, so as to drive the first threaded part 310 to rotate relative to the chassis 100, and further drive the bearing platform 200 to move up and down along the first direction 101.

[0045] In an alternative embodiment of the present application, as shown in Figure 2 , Figure 4 , Figure 5 The transmission assembly 340 can include a reducer 341, a bevel gear 342 and a gear ring 343. The reducer 341 is mainly used to reduce the rotational speed of the driving source 330 and increase the torque. The input end of the reducer 341 is connected with the driving source 330. The bevel gear 342 is connected to the output end of the reducer 341 and can rotate synchronously with the output end of the reducer 341. The gear ring 343 is sleeved on the outside of the first threaded member 310 and is fixedly connected with the first threaded member 310. The gear ring 343 and the first threaded member 310 can be manufactured separately and then assembled together by welding, bolting, riveting or the like. The gear ring 343 and the first threaded member 310 can also be of an integrated structure. The edge of the first threaded member 310 extends radially to form the gear ring 343. When the driving source 330 rotates, the bevel gear 342 meshes with the gear ring 343 to drive the first threaded member 310 to rotate relative to the chassis 100, thereby achieving the lifting control of the carrying platform 200. In this embodiment, the transmission assembly 340 has a simple structure and occupies less space, which is conducive to reducing the size of the trolley.

[0046] In actual processing, the nut, the bearing seat 350 and the gear ring 343 can be processed as a whole to save the installation space on the chassis 100. Of course, when the installation space is sufficient, the nut, the bearing seat 350 and the gear ring 343 can also be processed separately and then assembled.

[0047] In an alternative embodiment of the present application, as shown in Figure 1 and Figure 2 The guide mechanism 400 can include a sleeve 410 and a sliding column 420. The first end of the sleeve 410 is connected with the chassis 100, and the specific connection manner can be bolting, welding or the like. The second end of the sleeve 410 is an open end. The sliding column 420 can extend into the interior of the sleeve 410 through the second end of the sleeve 410. The sliding column 420 and the sleeve 410 can slide relative to each other along the first direction 101. The end of the sliding column 420 away from the chassis 100 is connected with the carrying platform 200, and the specific connection manner can be bolting, welding or the like. When the carrying platform 200 lifts along the first direction 101, the sliding column 420 and the sleeve 410 also slide relative to each other along the first direction 101. By limiting the position of the sliding column 420 and the sleeve 410, the lifting posture of the carrying platform 200 can be constrained to make the lifting process more stable. At the same time, the rotation of the second threaded member 320 and the carrying platform 200 can also be limited.

[0048] In an optional embodiment of the present application, the number of guide mechanisms 400 can be multiple, for example, three, four, five, etc., and multiple guide mechanisms 400 can be arranged at intervals along the edge of the carrying platform 200 to achieve guiding at different positions of the carrying platform 200. It should be noted that the surface of the carrying platform 200 facing the chassis 100 has an edge, which is the edge of the carrying platform 200 described above. The shape of the edge of the carrying platform 200 can be rectangular, circular, oval, etc. For example, a rectangular carrying platform 200 can be provided with a guide mechanism 400 at each corner to achieve stable guiding and limit the rotation of the carrying platform 200.

[0049] As shown in Figure 1 and Figure 2 , the chassis 100 can include a chassis body 110, a first steering wheel 120, a second steering wheel 130, a third steering wheel 140, and a fourth steering wheel 150. The first steering wheel 120 and the second steering wheel 130 are rotatably arranged at the front end of the chassis body 110, and the third steering wheel 140 and the fourth steering wheel 150 are rotatably arranged at the rear end of the chassis body 110. It should be noted that the front end and the rear end of the chassis body 110 can be the two ends of the chassis body 110 along its length direction. The steering wheel is a driving wheel, mainly used to realize the walking and steering function of the trolley, and by arranging four steering wheels, the flexibility of the trolley can be improved. The steering wheel and the lifting mechanism 300 can be powered by a battery, which can be arranged on the surface of the chassis 100.

[0050] As shown in Figure 1 and Figure 2 , the chassis 100 is also provided with a floating beam 160, the middle part of the floating beam 160 is rotatably installed on the rear end of the chassis body 110 through a connecting shaft, and the third steering wheel 140 and the fourth steering wheel 150 are rotatably arranged at the opposite ends of the floating beam 160. By arranging the floating beam 160, the contact state of the third steering wheel 140 and the fourth steering wheel 150 with the ground can be dynamically adjusted, so that the trolley can adapt to various complex road conditions.

[0051] As shown in Figure 6 and Figure 7As shown, the carrier can further include a shell 500 mounted on the chassis 100, and the shell 500 can be assembled with the chassis 100 in a clamping, bolted or other manner, and the shell 500 can protect the components provided on the chassis 100. The shell 500 is also provided with an opening, and the carrying platform 200 is arranged in the opening and is in clearance fit with the edge of the opening. In addition, the side surface of the shell 500 is also provided with a charging interface, a control switch, an indicator light, a sensor and other components, the charging interface is used to charge the built-in battery, the control switch can be used to control the opening and closing of the carrier, the indicator light can indicate the working state of the carrier, and the sensor is used to realize the walking and obstacle avoidance functions of the carrier.

[0052] The above embodiments of the present application mainly describe the differences between various embodiments, and the different optimization features between various embodiments can be combined to form a more optimal embodiment as long as they are not contradictory. In view of the brevity of the writing, the details are not repeated here.

[0053] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative but not restrictive. Those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims.

Claims

1. A carrier vehicle characterized in that, The lifting mechanism (300) comprises a first threaded member (310) and a second threaded member (320), the first threaded member (310) and the second threaded member (320) are arranged in extension along a first direction (101), the first threaded member (310) is rotationally connected with the chassis (100), the second threaded member (320) is connected with a surface of the bearing platform (200) facing the chassis (100), the first threaded member (310) and the second threaded member (320) are mutually sleeved and threadedly matched; Under the condition that the first threaded member (310) rotates relative to the chassis (100), the second threaded member (320) drives the bearing platform (200) to move up and down along the first direction (101); The first direction (101) is perpendicular to a disc surface of the chassis (100). The first threaded member (310) is a lead screw, the second threaded member (320) is a nut, the lead screw is rotationally connected with the chassis (100), an end surface of the nut is fixedly connected with the surface of the bearing platform (200) facing the chassis (100), the nut is sleeved on the lead screw and threadedly matched with the lead screw to form a lead screw pair. The first threaded member (310) is a nut, the second threaded member (320) is a lead screw, the nut is rotationally connected with the chassis (100), an end surface of the lead screw is fixedly connected with the surface of the bearing platform (200) facing the chassis (100), the nut is sleeved on the lead screw and threadedly matched with the lead screw to form a lead screw pair.

2. The truck of claim 1, wherein, The lifting mechanism (300) further comprises a bearing seat (350), the bearing seat (350) is protrusively arranged on a disc surface of the chassis (100), an end surface of the first threaded member (310) facing the chassis (100) is provided with an annular avoiding groove (311), at least part of the bearing seat (350) extends into the annular avoiding groove (311) and is slidingly matched with a groove wall of the annular avoiding groove (311).

3. The truck of claim 1, wherein, The bearing seat (350) is annular structure and comprises an inner annular surface and an outer annular surface, a ball bearing is arranged between the outer annular surface and the groove wall of the annular avoiding groove (311), and under the condition that the second threaded member (320) is a lead screw, the lead screw is slidingly matched with the inner annular surface.

4. The truck of claim 2 or 3, wherein, The lifting mechanism (300) further comprises a driving source (330) and a transmission assembly (340); 5. The vehicle of claim 4, wherein, ​ 6. The truck of claim 1, wherein, ​ The driving source (330) is connected with the chassis (100), the transmission assembly (340) is connected with the first threaded part (310) and the driving source (330) respectively, and the driving source (330) drives the first threaded part (310) to rotate relative to the chassis (100) through the transmission assembly (340).

7. The vehicle of claim 6, wherein The transmission assembly (340) comprises a speed reducer (341), a bevel gear (342) and a gear ring (343). The input end of the speed reducer (341) is connected with the driving source (330), the bevel gear (342) is connected to the output end of the speed reducer (341), and the gear ring (343) is sleeved on the outside of the first threaded part (310) and fixedly connected with the first threaded part (310). When the driving source (330) rotates, the bevel gear (342) and the gear ring (343) are engaged to drive the first threaded part (310) to rotate relative to the chassis (100).

8. The truck of claim 1, wherein, The carrier further comprises a guide mechanism (400), which is located outside the lifting mechanism (300), and the guide mechanism (400) is arranged to be telescopic along the first direction, and the two ends of the guide mechanism (400) along the first direction (101) are fixedly connected with the chassis (100) and the bearing platform (200) respectively.

9. The vehicle of claim 8, wherein, The guide mechanism (400) comprises a sleeve (410) and a sliding column (420), the first end of the sleeve (410) is connected with the chassis (100), the second end of the sleeve (410) is an open end, the sliding column (420) extends into the inside of the sleeve (410) through the second end, and the sliding column (420) slides relative to the sleeve (410) along the first direction (101), and the end of the sliding column (420) away from the chassis (100) is connected with the bearing platform (200).

10. The vehicle of claim 9, wherein, The carrier comprises a plurality of guide mechanisms (400), and the plurality of guide mechanisms (400) are arranged at intervals along the edge of the bearing platform (200).

11. The truck of claim 1, wherein, The chassis (100) comprises a chassis body (110), a first rudder wheel (120), a second rudder wheel (130), a third rudder wheel (140) and a fourth rudder wheel (150), the first rudder wheel (120) and the second rudder wheel (130) are rotatably arranged at the front end of the chassis body (110), and the third rudder wheel (140) and the fourth rudder wheel (150) are rotatably arranged at the rear end of the chassis body (110).

12. The truck of claim 11, wherein, The chassis (100) further comprises a floating beam (160), the middle part of the floating beam (160) is rotatably installed on the rear end of the chassis body (110) through a connecting shaft, and the third rudder wheel (140) and the fourth rudder wheel (150) are rotatably arranged at the opposite ends of the floating beam (160).

13. The truck of claim 1, wherein, Also included is a housing (500) covering mounted on the chassis (100), the housing (500) being provided with an opening, the bearing platform (200) being arranged in the opening.

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