CN115042903A

CN115042903A - Chassis and inverted tricycle

Info

Publication number: CN115042903A
Application number: CN202210743919.4A
Authority: CN
Inventors: 李磊; 张卓
Original assignee: Ningbo Weilun Intelligent Technology Co ltd
Current assignee: Ningbo Weilun Intelligent Technology Co ltd
Priority date: 2021-12-06
Filing date: 2022-06-28
Publication date: 2022-09-13
Anticipated expiration: 2042-06-28
Also published as: CN114162242A; CN115042903B; WO2024000935A1

Abstract

The application relates to the field of transportation equipment, especially, relate to a chassis and fall tricycle, it includes frame and steering mechanism, the frame with steering mechanism can dismantle the connection. The application has the effect of being convenient for production, packaging and storage transportation.

Description

Chassis and inverted tricycle

Technical Field

The application relates to the field of transportation equipment, in particular to a chassis and a tricycle.

Background

The tricycle is a vehicle formed by reforming a bicycle and has the characteristics of stability and good bearing capacity. At present, an inverted tricycle is available on the market, and is different from a common tricycle in that two wheel sets are arranged at the front part of the tricycle in the riding direction, and one wheel set is arranged at the rear part of the tricycle in the riding direction.

However, the steering assembly and the chassis of the existing inverted tricycle are usually welded and fixed, so that the whole steering assembly and the chassis need to be packaged together during packaging and transportation, and the packaging and subsequent transportation are extremely inconvenient.

Disclosure of Invention

In order to facilitate production, packaging, storage and transportation, the application provides a chassis and a tricycle that falls.

The technical scheme that the chassis provided by the application adopts as follows:

a chassis comprises a frame and a steering mechanism, wherein the frame is detachably connected with the steering mechanism.

Through adopting above-mentioned technical scheme, can dismantle frame and steering mechanism and connect, promptly, divide into two independent modules with frame and steering mechanism for frame and steering mechanism detachable packing connect frame and steering mechanism again when needing the equipment. Consequently, compare in current frame and turn to integrative design, can promote the packing convenience greatly, promote storage utilization ratio to and be convenient for transport. In addition, when later maintenance is replaced, the frame or the steering mechanism can be compounded according to requirements, so that the maintenance is convenient.

Optionally, the steering mechanism comprises a rotating shaft assembly and a mounting bottom plate, the mounting bottom plate is connected to the upper end of the rotating shaft assembly, and the mounting bottom plate is detachably connected to the bottom surface of the frame.

By adopting the technical scheme, after the rotating shaft assembly is connected with the mounting bottom plate, the steering mechanism module can be formed, and during subsequent installation, the mounting bottom plate and the frame are only required to be connected to complete the installation of the steering mechanism. The mounting bottom plate is detachably connected with the frame, so that the steering mechanism can be used as an independent whole, and subsequent packaging, storage and transportation are facilitated.

Optionally, the rotating shaft assembly comprises a rotating shaft, a shaft sleeve sleeved on the rotating shaft and a connecting plate connected to the outer peripheral surface of the shaft sleeve, the shaft sleeve is rotatably connected with the rotating shaft, and the upper end of the connecting plate is connected with the mounting base plate.

Through adopting above-mentioned technical scheme, the axle sleeve rotates with the pivot to be connected, and the axle sleeve passes through the connecting plate to be fixed with mounting plate to when the frame turned to, the axle sleeve rotated along with the frame.

Optionally, the rotating shaft assembly further comprises a connecting piece and a main beam, the main beam is fixed on one side of the connecting piece, and two ends of the connecting piece are respectively connected with two ends of the rotating shaft.

Through adopting above-mentioned technical scheme, the girder is used for synchronous front wheel group and rear wheel group, and the girder is fixed in the connecting piece, and the connecting piece is connected with the pivot, promptly, girder accessible connecting piece and pivot are connected.

Optionally, the outer peripheral surface of the shaft sleeve is connected with a limiting plate, one surface of the limiting plate, facing the main beam, is provided with a buffer member, and the buffer member is abutted against the side surface of the main beam to form a limiting state.

Through adopting above-mentioned technical scheme, when the axle sleeve turned to certain angle, the side butt of bolster and girder to form spacing state, restrict the axle sleeve promptly and further turn to, prevent that the axle sleeve from turning to excessively, thereby promote driving safety.

Optionally, the rotating shaft assembly further comprises an elastic member, and the elastic member forces the shaft sleeve to always keep the initial movement trend.

Through adopting above-mentioned technical scheme, the elastic component can force the axle sleeve to keep initial condition, and the initial condition of axle sleeve is the state that the axle sleeve does not deflect, is the straight line travel state when promptly, the chassis traveles. Thereby improving the stability of direction maintenance during straight line driving.

Optionally, the elastic member is connected to the outer peripheral surface of the rotating shaft, an abutting portion is arranged in the shaft sleeve, the abutting portion and the shaft sleeve rotate synchronously, and two ends of the elastic member abut against two end faces of the abutting portion respectively.

Through adopting above-mentioned technical scheme, with the elastic component integration in pivot and axle sleeve, compare in the current commonly used air spring of installation in the frame bottom, but greatly reduced steering mechanism's volume promotes steering mechanism's integrated level simultaneously greatly. Thereby further promoting the convenience of packing, transportation and storage.

When the abutting part rotates clockwise or anticlockwise along with the shaft sleeve, the elastic part can be extruded clockwise or anticlockwise, and the elastic part can correspondingly provide anticlockwise or clockwise restoring force, so that the driving stability is improved.

Optionally, a plurality of elastic pieces are evenly arranged on the outer peripheral surface of the rotating shaft at intervals, an abutting portion which is synchronously rotated with the shaft sleeve is convexly arranged on one side of the limiting plate, a plurality of abutting pieces are convexly arranged on the outer peripheral surface of the rotating shaft, one end surface of each elastic piece abuts against the abutting portion, and the other end surface of each elastic piece abuts against the abutting portion.

Through adopting above-mentioned technical scheme, the cooperation of a plurality of elastic components and butt piece and butt portion can further promote driving stability.

Optionally, one side of the abutting member is convexly provided with an inserting portion, the periphery of the rotating shaft is provided with a jack for inserting the inserting portion, and the inserting portion is inserted into the jack.

By adopting the technical scheme, the butting part can be positioned by plugging the plugging part into the jack, so that the installation of the butting part is facilitated.

In a second aspect, the present application provides a tricycle.

The application provides a fall tricycle adopts following technical scheme:

the utility model provides a tricycle falls, includes foretell chassis, front wheel group assembly and goods fill, front wheel group assembly with the connection can be dismantled to the frame, the goods fill with the connection can be dismantled to the frame.

Through adopting above-mentioned technical scheme, goods fill and front wheel group all can dismantle with the frame to further promote the holistic packing of tricycle, storage and transportation stability.

In summary, the present application includes at least one of the following beneficial technical effects:

the frame and the steering mechanism are detachably connected, namely, the frame and the steering mechanism are divided into two independent modules, so that the frame and the steering mechanism can be separately packaged, and the frame and the steering mechanism are connected when assembling is needed. Consequently, compare in current frame and turn to integrative design, can promote the packing convenience greatly, promote storage utilization ratio to and be convenient for transport. In addition, when later maintenance and replacement are carried out, the frame or the steering mechanism can be compounded according to requirements, so that the maintenance is convenient;

the elastic element can force the shaft sleeve to maintain an initial state, wherein the initial state of the shaft sleeve is a state that the shaft sleeve is not deflected, namely a straight driving state when the chassis drives. Thereby improving the stability of direction maintenance during straight-line driving;

integrate the elastic component in pivot and axle sleeve, compare in the current commonly used air spring of installation in the frame bottom, but greatly reduced steering mechanism's volume promotes steering mechanism's integrated level simultaneously greatly. Thereby further promoting the convenience of packing, transportation and storage.

The front wheel set and the chassis can be detached, so that the overall packaging, storage and transportation stability of the inverted tricycle is further improved.

Drawings

FIG. 1 is a schematic view of the overall structure of a chassis according to an embodiment of the present application;

FIG. 2 is an exploded schematic view of the chassis of an embodiment of the present application;

FIG. 3 is an exploded schematic view of the steering mechanism of an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a connector according to an embodiment of the present application;

FIG. 5 is an exploded view of the spindle assembly of the embodiment of the present application;

FIG. 6 is a schematic view of the engagement of the elastic member, the limiting plate and the abutment member according to the embodiment of the present application;

FIG. 7 is a top view of a steering mechanism of an embodiment of the present application;

FIG. 8 is an exploded view of the elastic member and abutment of an embodiment of the present application;

FIG. 9 is an exploded view of the elastic member, abutment member and abutment portion of another embodiment of the present application;

FIG. 10 is a schematic view of the overall structure of the inverted tricycle according to the embodiment of the present application;

fig. 11 is a schematic overall structure diagram of the inverted tricycle according to the embodiment of the present application;

fig. 12 is an enlarged schematic view of a portion a in fig. 11.

Description of reference numerals: 1. a frame; 2. a steering mechanism; 3. assembling a front wheel set; 4. assembling a rear wheel set; 5. a cargo bucket; 11. enclosing a frame; 12. a cross bar; 13. a vertical rod; 20. a rotating shaft assembly; 21. mounting a bottom plate; 22. a connecting member; 23. a main beam; 24. a limiting component; 200. a rotating shaft; 201. a shaft sleeve; 202. a connecting plate; 203. positioning a nut; 204. a bearing; 205. a first bearing; 206. a second bearing; 207. abutting against the first groove; 208. a second abutting groove; 209. a limiting plate; 210. bolt holes; 211. positioning the bump; 240. a buffer member; 241. a buffer head; 242. fixing the rod; 243. positioning holes; 215. an elastic member; 216. an abutting portion; 217. a synchronization hole; 218. an abutting member; 219. a jack; 220. a first fixing part; 221. a second fixed part; 222. a third fixed part; 223. perforating; 224. an ear plate; 225. a plug-in part; 226. abutting the notch; 227. a first butting port; 228. a second butting port; 229. fixing a nut; 230. a positioning part; 231. a fixed block; 233. a hole of abdication; 30. a front wheel set; 31. a linkage shaft; 32. a positioning plate group; 33. a first positioning plate; 34. a second positioning plate; 51. a plate member.

Detailed Description

The present application is described in further detail below with reference to figures 1-12.

The embodiment of the application discloses a chassis. Referring to fig. 1, the chassis comprises a frame 1 and a steering mechanism 2, wherein the steering mechanism 2 is detachably connected to the frame 1, so that the frame 1 and the steering mechanism 2 can be separated into two independent modules for convenient packaging and transportation.

Referring to fig. 2 and 3, the steering mechanism 2 includes a spindle assembly 20, a mounting base plate 21, a connecting member 22, a main beam 23, and a limit assembly 24. The limiting component 24 is fixed with the rotating shaft component 20, the rotating shaft component 20 is fixed with the mounting bottom plate 21, the main beam 23 is connected with the rotating shaft component 20 through the connecting piece 22, the mounting bottom plate 21 is detachably connected with the frame 1, and therefore the steering mechanism 2 is formed into an independent module.

The detachable connection mode of the mounting bottom plate 21 and the frame 1 can be in plug-in connection, clamping connection, bolt connection and the like, and in the embodiment of the application, the mounting bottom plate 21 and the frame 1 are in bolt connection. Specifically, bolt holes 210 are opened at four corners of the mounting base plate 21, and correspondingly, the frame 1 is also opened with the bolt holes 210. After the mounting base plate 21 is connected with the frame 1 through the bolts, the upper end surface of the mounting base plate 21 is abutted against the bottom surface of the frame 1.

Referring to fig. 2, 4 and 5, the connecting member 22 is "Contraband" in its entirety, specifically, the connecting member 22 includes a first fixing portion 220, and a second fixing portion 221 and a third fixing portion 222 bent at two ends of the first fixing portion 220, and the bending directions of the first fixing portion 220 of the second fixing portion 221 and the third fixing portion 222 are the same. Wherein, the first fixing part 220 is fixed with one end of the main beam 23, and the second fixing part 221 is connected with one end of the rotating shaft assembly 20; the third fixed portion 222 is connected to the other end of the spindle assembly 20.

The rotating shaft assembly 20 includes a rotating shaft 200, a shaft sleeve 201 and a connecting plate 202, wherein the shaft sleeve 201 is sleeved on the rotating shaft 200, and the shaft sleeve 201 rotates around the rotating shaft 200. The coupling plate 202 is coupled to the outer circumference of the shaft sleeve 201, and the upper end of the coupling plate 202 is coupled to the mounting baseplate 21, whereby the shaft sleeve 201 is coupled to the mounting baseplate 21 via the coupling plate 202. It should be noted that, the connection manner between the connection plate 202 and the shaft sleeve 201, and the connection plate 202 and the mounting baseplate 21 may be fixed to each other, and in this embodiment, welding is adopted.

The upper end of the rotating shaft 200 penetrates through the shaft sleeve 201 and also penetrates through the second fixing portion 221, and correspondingly, the second fixing portion 221 is provided with a through hole 223 for the upper end of the rotating shaft 200 to penetrate through. A fixing block 231 is integrally and convexly arranged at the upper end of the rotating shaft 200, an ear plate 224 is integrally and convexly arranged on the periphery of the fixing block 231, and the ear plate 224 is connected with the upper end surface of the second fixing part 221 through a bolt. In addition, the mounting base plate 21 is provided with a relief hole 233, and the relief hole 233 corresponds to the fixing block 231, so that the fixing block 231 is prevented from interfering with the mounting base plate 21 when the rotating shaft assembly 20 is connected with the mounting base plate 21.

The lower end of the shaft 200 penetrates through the lower end of the shaft sleeve 201, meanwhile, the lower end of the shaft 200 penetrates through the third fixing portion 222, and correspondingly, the third fixing portion 222 is also provided with a through hole 223 for the upper end of the shaft 200 to penetrate through. The lower end of the rotating shaft 200 is provided with an external thread, further, the lower end of the rotating shaft 200 is connected with a positioning nut 203 in a threaded manner, and the positioning nut 203 is tightly abutted to the lower end face of the third fixing portion 222.

In order to make the relative rotation between the sleeve 201 and the rotating shaft 200 smoother, a bearing is connected to the rotating shaft 200. Of course, the number of the bearings may be one or more. In the embodiment of the present application, a bearing is connected to both the upper end and the lower end of the rotating shaft 200. The rotating shaft 200 penetrates and abuts against the inner ring of the bearing, and the outer ring of the bearing abuts against the inner circumferential surface of the shaft sleeve 201. For convenience of description, a bearing connected to the upper end of the rotating shaft 200 is defined as a first bearing 205, and a bearing connected to the lower end of the rotating shaft 200 is defined as a second bearing 206; the outer peripheral surface of the rotating shaft 200 is sleeved with a positioning bump 211, and the positioning bump 211 is located between the first bearing 205 and the second bearing 206.

The inner wall of the upper end of the shaft sleeve 201 is provided with a first abutting groove 207, the lower end surface of the outer ring of the first bearing 205 abuts against the first abutting groove 207, and the lower end surface of the inner ring of the first bearing 205 abuts against the upper end surface of the positioning lug 211. Namely, the first bearing 205 is limited by the first abutting groove 207 and the positioning lug 211 to move in the downward radial direction, and the first bearing 205 is limited by the second fixing part 221 to move in the upward radial direction.

The inner wall of the lower end of the shaft sleeve 201 is provided with a second abutting groove 208, the upper end surface of the outer ring of the second bearing 206 abuts against the second abutting groove 208, and the upper end surface of the inner ring of the second bearing 206 abuts against the lower end surface of the positioning lug 211. That is, the second bearing 206 is restricted from moving radially upward by the second abutting groove 208 and the positioning projection 211, and the second bearing 206 is restricted from moving radially downward by the third fixing portion 222.

Referring to fig. 6 and 7, the stopper assembly 24 includes a stopper plate 209 connected to the outer circumferential surface of the sleeve 201, and a buffer 211 connected to the stopper plate 209.

In this embodiment, the limiting plate 209 is provided with two, and uses the girder 23 as the central line symmetry setting, and the up end of limiting plate 209 is fixed with mounting plate 21's lower terminal surface. One side of the limit plate 209 is bent toward the outer side of the main beam 23, so that when the sleeve 201 rotates at a certain angle, one side of the limit plate 209 abuts against the outer side of the main beam 23 to form a limit, thereby preventing oversteer. Of course, the connection manner of the limiting plate 209 and the shaft sleeve 201 is not limited, and may be fixed or detachably connected. In the embodiment of the present application, the limiting plate 209 is welded with the shaft sleeve 201.

The cushion 211 is connected to the bent sides of the two stopper plates 209. The cushion member 211 deflects along with the stopper plate 209, and when the cushion member 211 abuts against the main beam 23, a stopper state is formed, so that the stopper plate 209 abuts against the main beam 23, and the impact strength between the stopper plate 209 and the main beam 23 is reduced.

Referring to fig. 7, the buffer 211 includes a buffer head 212 and a fixing rod 213. The buffer head 212 is made of rubber, one end of the fixing rod 213 is inserted into the buffer head 212 in an interference manner, and the other end of the fixing rod 213 is provided with external threads. The position-limiting plate 209 is provided with a positioning hole 214 for the threaded end of the fixing rod 213 to penetrate through, and the diameter of the positioning hole 214 is smaller than that of the buffer head 212, and the fixing rod 213 is further fixed by a nut after penetrating through the positioning hole 214. It is noted that the bumper head 212 is attached to the end of the fixed rod facing the main beam 23.

Referring to fig. 6 and 8, the rotary shaft assembly 20 further includes an elastic member 215 for forcing the sleeve 201 to always maintain an initial state. Here, the initial state refers to a state in which the vehicle is not steered during driving, that is, a straight-line driving state. Specifically, the elastic member 215 may be a rubber block, a compression spring, a silicone block, or the like, and in the embodiment of the present invention, the elastic member 215 is a silicone block. The elastic member 215 is fixed to the outer peripheral surface of the positioning protrusion 211, and specifically, in the embodiment of the present application, gluing is used. It should be noted that the point of adhesion is only the middle of the elastic bonding surface, and not the entire surface of the elastic bonding surface, thereby maintaining the compressive deformability of the two ends of the elastic toward the middle. Of course, the number of the elastic members 215 may be one or more.

Referring to fig. 6 and 8, in an embodiment, the number of the elastic elements 215 is one, one side of any one of the limiting plates 209 is convexly provided with an abutting portion 216, the shaft sleeve 201 is provided with a synchronization hole 217 through which the abutting portion 216 passes, the elastic element 215 is annularly arranged on the outer circumferential surface of the positioning protrusion 211, the elastic element 215 is provided with an abutting notch 226, the abutting portion 216 passes through the synchronization hole 217 and is inserted into the abutting notch 226, when the abutting portion 216 deflects along with the limiting plate 209, one side surface of the abutting portion 216 abuts against and presses one end surface of the elastic element 215, and the elastic element 215 is compressed. When the abutting portion 216 no longer presses the elastic member 215, the elastic member 215 returns to reversely deflect and reset the stopper plate 209. Of course, the deflection of the limiting plate 209 may be a clockwise deflection or a counterclockwise deflection.

Referring to fig. 6 and 9, in another embodiment, the number of the elastic members 215 is four, and the four elastic members 215 are uniformly spaced. Abutting parts 216 are convexly arranged on one sides of the two limiting plates 209; two abutting pieces 218 are symmetrically and convexly arranged on the outer peripheral surface of the positioning lug 211, and the connecting line of the abutting pieces 218 is overlapped with the symmetrical line of the two limiting plates 209. Of course, the abutting member 218 and the outer peripheral surface of the positioning protrusion 211 may be welded, adhered or detachably connected. In the embodiment of the present application, the outer peripheral surface of the positioning protrusion 211 is provided with a plug hole 219, one side of the abutting member 218 is convexly provided with an inserting portion 225, and the inserting portion 225 is inserted into the plug hole 219.

Specifically, abutting ports are formed between adjacent elastic members 215. For convenience of explanation, an abutment port coinciding with a line of symmetry of the two stopper plates 209 is defined as a first abutment port 227, and an abutment port perpendicular to the line of symmetry of the two stopper plates 209 is defined as a second abutment port 228. The insertion portion 225 is inserted into the first abutting port 227, and the abutting portion 216 is inserted into the second abutting port 228, so that one end surface of the elastic member 215 abuts against the abutting member 218, and the other end surface abuts against the abutting portion 216.

Referring back to fig. 2, the shape and the structure of the frame 1 can be determined according to actual requirements, for example, in the embodiment of the present application, the frame 1 includes a surrounding frame 11, a cross bar 12 and a vertical bar 13. The number of the cross bars 12 and the vertical bars 13 can be determined according to the actual design requirements. In the embodiment of the application, a cross rod 12 and four vertical rods 13 are adopted. Specifically, the enclosure frame 11 is rectangular, and four corners of the enclosure frame are chamfered. The both ends of horizontal pole 12 are connected respectively in the inner wall of enclosing frame 11 two broadsides, and are located the mid point of enclosing frame 11 broadside, and the one end of montant 13 is connected in the inner wall of enclosing frame 11, and the other end is connected in the lateral surface of horizontal pole 12. The four vertical bars 13 are symmetrically distributed on two sides of the cross bar 12 in pairs, and the two vertical bars 13 on the same side are distributed in parallel. In addition, the connection mode among the surrounding frame 11, the cross bar 12 and the vertical bar 13 is a fixing mode commonly used in the field, such as welding or bolt connection, and is not described herein again.

The implementation principle of a chassis in the embodiment of the application is as follows: frame 1 and steering mechanism 2 can dismantle the connection, then can form two solitary modules with frame 1 and steering mechanism 2, after frame 1 and steering mechanism 2 respectively produced, compare in current direct will turn to structure and frame 1 welding, this application can carry out follow-up storage, packing and transportation as solitary module with frame 1 and steering mechanism 2.

The vibrations of driving in-process make limiting plate 209 rotate along with axle sleeve 201 to thereby drive butt portion 216 and rotate extrusion elastic component 215, make elastic component 215 deformation, elastic component 215 then replies and makes limiting plate 209 reverse deflection and reset, thereby promote the shock attenuation effect on chassis, promote driving stability simultaneously.

A reverse tricycle, refer to fig. 10 and fig. 11, comprises the chassis, a front wheel assembly 3 and a cargo bucket 5, wherein the front wheel assembly 3 is detachably connected with a frame 1, and the cargo bucket 5 is detachably connected with the frame 1. The other end of the main beam 23 is detachably connected to the rear wheel assembly 4 and can also be welded with the rear wheel assembly 4. The rear wheel set assembly 4 is connected with the frame 1 through a main beam 23. The bucket 5 is bolted to the frame 1.

Referring to fig. 11 and 12, the front wheel set assembly 3 includes a front wheel set 30, a linkage shaft 31 and a positioning plate set, one end of the linkage shaft 31 is rotatably connected to one side of the front wheel set 30, and the other end of the linkage shaft 31 is fixed to the positioning plate set 32. The retainer plate groups 32 are detachably attached to both sides of the frame 1, so that the front wheel set 30 is detachably attached to both sides of the frame 1 through the retainer plate groups 32, thereby also modularly packaging the front wheel set 30.

Specifically, the positioning plate group 32 includes a first positioning plate 33 connected to the inner side wall of the enclosure frame 11 and a second positioning plate 34 connected to the outer side wall of the enclosure frame 11. The first positioning plate 33 and the second positioning plate 34 are detachably connected with the enclosure frame 11 through bolts, and the other end of the linkage shaft 31 penetrates through the first positioning plate 33 and the second positioning plate 34 and is welded with the first positioning plate 33 and the second positioning plate 34.

Referring to fig. 10 and 11, in addition, the cargo bucket 5 includes a plurality of plate members, and the cargo bucket 5 may be formed by welding the plurality of plate members, or may be detachably connected by bolts, hinges, and the like. In the embodiment of the application, the cargo hopper 5 is detachably connected by a plurality of plate members through bolts, hinges and the like.

The implementation principle of the inverted tricycle in the embodiment of the application is as follows: the front wheel group 30 is detachably connected with the chassis through the positioning plate group 32, so that the front wheel group assembly 3 is also divided into two independent modules together with the chassis, and similarly, the front wheel group assembly 3 can be independently packaged and sold separately in production, and the flexibility of transportation and storage is also improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A chassis, characterized by: the foldable bicycle frame comprises a bicycle frame (1) and a steering mechanism (2), wherein the bicycle frame (1) is detachably connected with the steering mechanism (2).

2. The chassis of claim 1, wherein: steering mechanism (2) are including pivot subassembly (20) and mounting plate (21), mounting plate (21) connect in pivot subassembly (20) upper end, mounting plate (21) can dismantle connect in frame (1) bottom surface.

3. The chassis of claim 2, wherein: the rotating shaft assembly (20) comprises a rotating shaft (200), a shaft sleeve (201) sleeved on the rotating shaft (200) and a connecting plate (202) connected to the outer peripheral surface of the shaft sleeve (201), the shaft sleeve (201) is rotatably connected with the rotating shaft (200), and the upper end of the connecting plate (202) is connected with the mounting bottom plate (21).

4. The chassis of claim 3, wherein: the rotating shaft assembly (20) further comprises a connecting piece (22) and a main beam (23), the main beam (23) is fixed on one side of the connecting piece (22), and two ends of the connecting piece (22) are connected with two ends of the rotating shaft (200) respectively.

5. The chassis of claim 4, wherein: the outer peripheral face of the shaft sleeve (201) is connected with a limiting plate (209), one face of the limiting plate (209) facing the main beam (23) is provided with a buffer piece (211), and the buffer piece (211) is abutted to the side face of the main beam (23) to form a limiting state.

6. The chassis of claim 5, wherein: the rotating shaft assembly (20) further comprises an elastic member (215), and the elastic member (215) forces the shaft sleeve (201) to always keep the initial state of movement trend.

7. The chassis of claim 6, wherein: the elastic piece (215) is connected to the outer peripheral surface of the rotating shaft (200), a butting part (216) is arranged in the shaft sleeve (201), the butting part (216) and the shaft sleeve (201) rotate synchronously, and two ends of the elastic piece (215) are respectively butted with two end faces of the butting part (216).

8. The chassis of claim 6, wherein: the outer peripheral face of the rotating shaft (200) is evenly provided with a plurality of elastic pieces (215) at intervals, one side of the limiting plate (209) is convexly provided with a butting portion (216) which synchronously rotates with the shaft sleeve (201), the outer peripheral face of the rotating shaft (200) is convexly provided with a plurality of butting portions (218), one end face of each elastic piece (215) is butted with the butting portion (216), and the other end face of each elastic piece (215) is butted with the butting portion (216).

9. The chassis of claim 8, wherein: one side of the abutting part (218) is convexly provided with an inserting part (225), the periphery of the rotating shaft (200) is provided with a jack (219) for inserting the inserting part (225), and the inserting part (225) is inserted into the jack (219).

10. Inverted tricycle, comprising a chassis according to any of claims 1-9, a front wheel set assembly (3) and a bucket (5), the front wheel set assembly (3) being detachably connected to the frame (1), the bucket (5) being detachably connected to the frame (1).