WO2022151557A1

WO2022151557A1 - Swing-type three-wheeled vehicle

Info

Publication number: WO2022151557A1
Application number: PCT/CN2021/076162
Authority: WO
Inventors: 楼攀登
Original assignee: 胡民国
Priority date: 2021-01-13
Filing date: 2021-02-09
Publication date: 2022-07-21
Also published as: CN112644619A

Abstract

A swing-type three-wheeled vehicle. A vehicle body (1) comprises a vehicle frame (11), two first vehicle wheels (13) and a second vehicle wheel (14); and a swing mechanism (R) is arranged between the two first vehicle wheels (13). The swing mechanism (R) comprises a first connecting rod (2) and a second connecting rod (3), and when the vehicle body (1) is in an inclined state, the first connecting rod (2) and the second connecting rod (3) can rotate around rotation axes at the respective middle parts of one another, move to the left side or right side in a mutually alternating manner, and are vertically close to each other. Compared with the prior art, when the vehicle body of the present invention is in the inclined state, the swing mechanism can provide effective support and a firm constraint for the vehicle body and the inclining of the vehicle wheels, such that the three-wheeled vehicle easily realizes steering, has a greatly reduced turning radius, does not easily roll over during driving, and is safer.

Description

A swinging tricycle

technical field

The invention relates to a tricycle, in particular to a swing-type tricycle whose front two wheels can swing.

Background technique

Tricycles, mopeds and recreational vehicles usually have a different model structure from traditional two-wheeled bicycles. Such bicycles are often provided with a body, compartment, etc. on the front or rear side of the riding position to meet the load-bearing requirements. For example, there is an inverted three-wheeled recreational vehicle. The handlebar controls the two wheels on the front side, and the body is also fixed between the two wheels on the front side. Objects or children can be placed in the body, which is convenient for the rider to take care of.

For a traditional inverted three-wheeled bicycle, the body cannot be tilted during use, and the two wheels on the front side must fall on the ground together (otherwise it is easy to roll over), and in order to ensure the space of the body, the distance between the two wheels on the front side cannot be If it is too small, in the process of using this kind of bicycle, the two wheels on the front side are restrained by a large force, and the handling of the handlebars will obviously feel stiff, and the direction cannot be easily changed. Especially when making big turns (such as turning left/right by 90 degrees or even more than 90 degrees), the inclination of the body can not compensate for the centrifugal effect caused by turning like a traditional bicycle, which leads to a generally larger turning radius of such models. Large, when the body is loaded with heavy objects, in order to ensure safety, the turning radius will even be larger, and a little carelessness will easily lead to a rollover accident, which is not safe enough. In order to ensure safety, when a big turn is required, the cyclist often gets out of the car and pushes it. It can be seen that there are many inconveniences in the actual use of the existing recreational vehicle.

For this reason, the Chinese patent with the patent number of CN200720011505.3 (announcement number of CN201023610Y) discloses a "new tricycle", the tricycle includes a body, wheels, wheel shock absorbers, the upper part of the shock absorber of the rear wheel and the swing control Both ends of the rod are rotatably connected, the middle part of the swing control rod is provided with a control shaft, the middle part of the shock absorber of the rear wheel is rotatably connected with both ends of the support frame, and the middle part of the support frame is provided with a load-bearing shaft that is horizontal to the front and rear of the vehicle body , The bearing shaft is rotatably connected with the support frame, the control shaft is rotatably connected with the vehicle body, and the bearing shaft is fixed on the vehicle body. It should be pointed out that in this patent, the shock absorber is applied to a common tricycle with two wheels on the rear side, not the above-mentioned inverted tricycle. The patented two rear wheel shock absorbers, the support frame and the swing control rod form a four-bar linkage mechanism, so that the two rear wheels of the tricycle are always in contact with the ground when the tricycle is turning, so as to prevent rollover.

Although the above-mentioned tricycle reduces the turning radius of the tricycle through the inclination of the wheel body, its swing inclination involves the support frame and the swing control rod, and only the support frame below and the load-bearing shaft of the vehicle body are generated. In this way, although the tilt of the tricycle is realized when turning, but the lack of the relationship between the swing control rod and the bearing shaft leads to insufficient restraint of the support frame on the tilt of the body, which is reflected in the fact that the body swings abruptly, lacks integrity and It is very uncoordinated; on the other hand, only the support frame is used as the support for swinging. When the body is in a tilted state, the center of gravity completely falls on the support frame, which will cause the support frame and its adjacent parts to be unevenly distributed, and long-term use will cause Security risks. At the same time, the shock absorber in this patent cannot be adapted to the above-mentioned inverted tricycle.

In addition, the tilt locking mechanism of the tricycle is only provided at the joints, which lacks the limit force. In daily use, it is easy to cause unnecessary tilt of the body due to accidental touch.

SUMMARY OF THE INVENTION

The first technical problem to be solved by the present invention is to provide a swinging tricycle that can provide effective support and firm restraint for the inclination of the body and the wheels, and the swinging mechanism enables the tricycle to easily steer and turn The radius is greatly reduced, and it is not easy to roll over, making it safer.

The second technical problem to be solved by the present invention is to provide a rocking tricycle with a simple and effective locking operation of the rocking mechanism in view of the current state of the prior art.

The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a swinging tricycle, comprising:

The body has a frame, two first wheels movably connected to the front end of the frame, and a second wheel movably connected to the rear end of the frame;

A rocking mechanism is provided between the two first wheels, and the rocking mechanism includes:

A first connecting rod, the middle of which is rotatably constrained on the frame, the rotation axis of the first connecting rod is consistent with the extending direction of the frame, and the two ends of the first connecting rod can be left or left relative to the first wheel. The right side is pivotally connected to the first wheel;

A second link is arranged below the frame and the middle part is rotatably constrained on the frame, the rotation axis of the second link and the rotation axis of the first link are arranged in parallel up and down and can be opposite to each other The left and right dislocations move, and the two ends are respectively connected to the first wheel so as to be deflected to the left or right relative to the first wheel, and the two ends of the second connecting rod are also always located below the two ends of the first connecting rod;

When the vehicle body is in a tilted state, the first link and the second link can rotate around the rotation axis of their respective middle parts, and move to the left or right in a staggered manner and approach up and down.

In order to further ensure that the first connecting rod and the second connecting rod can be installed on the connecting seat and have a reasonable layout, preferably, the rocking tricycle further includes a connecting seat extending up and down, and the frame passes through the connecting seat. The middle part of the seat, the middle part of the first connecting rod is constrained to rotate on the upper end of the connecting seat, and the middle part of the second connecting rod is constrained to rotate on the lower end of the connecting seat.

The connecting seat can be in different forms. Specifically, the connecting seat includes two connecting pieces arranged at intervals along the extending direction of the frame, and a first rotating shaft is arranged between the upper ends of the two connecting pieces. The middle part of the rod is provided with a first shaft sleeve matching the first rotating shaft; a second rotating shaft is arranged between the lower ends of the two connecting pieces, and the second connecting rod is arranged in the middle part to match the second rotating shaft of the second shaft sleeve.

In order to facilitate the inclination of the vehicle body, preferably, the first link has two sub-rods distributed on both sides of the first bushing, and each sub-rod has an arc-shaped structure with both ends bent upward, so that in the middle Form a way-out gap to avoid the bottom of the bucket. With the design of the gap, when the body is tilted and moved, the first link will not affect its own reciprocating movement due to the existence of the bucket, which further ensures the smooth tilt of the body.

In order to realize the installation of the wheel with the first connecting rod and the second connecting rod, preferably, a vertically arranged support seat is provided on the wheel shaft of each first wheel, the wheel shaft can rotate relative to the support seat, and the end of the first connecting rod is and the ends of the second connecting rod are respectively rotatably connected to the upper part and the lower part of the support base.

Specifically, the support seat includes a first support piece arranged adjacent to the first link, the second link, and a second support piece arranged adjacent to the corresponding first wheel, and the end of the first link is connected to the first link. The upper end of the support piece, the second link is connected to the lower end of the first support piece, the second support piece is arranged on one end of the axle, and the first wheel is mounted on the other end of the axle. The design of the support seat can divide the tilting and swinging of the first wheel into two parts, the upper and lower parts, the inner and outer movement, which are connected and driven by the first link and the second link respectively, thereby ensuring the effective tilt of the first wheel.

In order to make up for the travel difference that the first wheel may cause when the first wheel is deflected, the first support piece and the second support piece are movably connected together through a joint bearing, the joint bearing includes a bearing outer ring and is embedded outside the bearing. A ball head in the ring, the bearing outer ring is connected to the first support sheet, and the ball head is connected to the second support sheet.

In order to further solve the above-mentioned second technical problem, the technical solution adopted in the present invention is as follows: a limiting mechanism is further included, and the limiting mechanism includes:

The first limiting piece is arranged on the first connecting rod, and a limiting opening which penetrates along the extending direction of the frame is opened on the first connecting rod;

The second limit piece is arranged at an interval from the first limit piece, and a limit groove is formed on the second limit piece, which penetrates along the extending direction of the frame and extends along the swing direction of the first link;

a limit rod, connected to the frame, and arranged to move back and forth along the extension direction of the frame, so as to be alternately limited in the limit opening or the limit groove;

The vehicle body is in a first use state when the limit rod is moved to be limited within the limit opening;

The vehicle body is in a second use state when the limiting rod is moved to be limited within the limiting groove. The design of the limit mechanism in this way can flexibly select the state the body needs to be in through the position of the limit rod, realize turning and tilting when driving, avoid the turning angle from being too large, and realize the stable vertical position of the body when driving in a straight line or when stationary. Straight, avoid unnecessary inclination caused by accidental touch, and through the cooperation of the limit rod and the slot holes of different diameters on the limit piece, the mechanical structure is stable and mature, and it is simpler and more efficient.

Specifically, the first end of the frame is provided with a vertically extending bracket at a position adjacent to the end, the limit rod is mounted on the bracket through a sleeve, and the first limit piece and the second limiter are installed on the bracket. The limiting pieces are all located between the two connecting pieces, and the limiting rod is arranged outside the two connecting pieces and can move toward the first limiting piece and the second limiting piece.

In order to ensure that the vehicle body has a maximum inclination angle when the vehicle body is tilted realistically, preferably, the longitudinal section of the limiting groove is an arc structure with both ends bent upward, and when the vehicle body is inclined to the left or right , the first link swings synchronously with the vehicle body, so that the limit rod is abutted against the corresponding end walls at both ends of the limit groove, thereby forming a limit position for the vehicle body to incline on this side as a vehicle body tilt limit There are various forms, such that the limit rod and the limit groove are used in the form of sliding cooperation, and the end walls at both ends of the limit groove are used to form the limit of the sliding stroke of the limit rod, which is very convenient and practical.

In order to ensure that the vehicle body is locked and will not tilt in a natural state, preferably, the limiting mechanism further includes an elastic piece, and the power output end of the elastic piece acts on the limiting rod, so that the limiting rod is always There is a tendency to move toward the direction of the first limiting piece and the second limiting piece.

There are various structures for realizing the locking of the limit rod. Preferably, the limit rod is at least partially located in one end of the sleeve, the other end of the sleeve is provided with a locking end, and the elastic The piece is arranged in the sleeve and the two ends are respectively abutted against the locking end and the limit rod.

In order to ensure that the limit can be triggered stably, preferably, the limit mechanism further includes a trigger, the power output end of the trigger acts on the limit rod, and can make the limit rod move away from the first The direction of the first limit piece and the second limit piece moves, so that the elastic member is in an energy storage state.

In order to make the limit rod easier to operate, preferably, the frame is provided with a handlebar, the handlebar is provided with a switch, one end of the trigger is connected to the limit rod, and the other end is connected to the limit rod. the traction rope on the switch.

In order to realize the steering action of the vehicle body in the running state, the rocking tricycle further includes a steering mechanism, the steering mechanism includes a steering seat and a steering rod, and the power input end of the steering seat is connected with the output end of the handlebar , and can rotate synchronously with the handlebar, there are two steering rods, one end of each steering rod is connected to the corresponding side of the steering seat, and the other end is connected to the rear side of the corresponding first wheel, And under the rotating action of the steering seat, the steering rod drives the first wheel to deflect toward the turning side, and the deflection axis of the first wheel extends vertically.

Compared with the prior art, the present invention has the advantages that: in the swing mechanism of the swing tricycle, both the first link and the second link can rotate relative to the frame. For the support and drive deflection of the first wheel, the first link located above the second link can also constrain the upper part of the first wheel, and the two cooperate with each other, which is equivalent to forming a parallelogram structure, which can It provides effective support and stable constraints for the tilt of the body and the wheels, and the angle changes linearly, making the tricycle easy to turn, the turning radius is greatly reduced, there will be no sudden change of a large angle, it is not easy to roll over, and it is safer;

In addition, the design that the first link and the second link are constrained on the frame can distribute the stress of the two links themselves to the frame during deflection to jointly bear. Since the frame tends to have higher strength, such a The design can make up for the short board with insufficient strength of the connecting rod, thereby improving the service life of the whole vehicle.

Description of drawings

1 is a schematic diagram of the overall structure of a swinging tricycle in an embodiment of the present invention;

2 is a schematic diagram of the overall structure of the swinging tricycle after omitting the bucket in the embodiment of the present invention;

Fig. 3 is the schematic diagram of another angle of Fig. 2;

FIG. 4 is a schematic diagram of the first end of the vehicle frame with a partial structure omitted in the embodiment of the present invention;

Fig. 5 is the partial structure exploded schematic diagram of another angle of Fig. 4;

Fig. 6 is the partial structure exploded schematic diagram of the first angle of Fig. 5;

Fig. 7 is the partial structure exploded schematic diagram of the first angle of Fig. 5;

8 is an overall schematic diagram of a limiting mechanism in an embodiment of the present invention;

9 is a partial cross-sectional view of the cooperation between the limit mechanism and the vehicle frame in the embodiment of the present invention;

Fig. 10 is the enlarged schematic diagram at A place in Fig. 9;

11 is a schematic diagram of a swing mechanism of a swing tricycle in a normal state according to an embodiment of the present invention;

FIG. 12 is a schematic diagram of the rocking mechanism when the rocking tricycle is in a tilted state according to the embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below with reference to the embodiments of the accompanying drawings.

As shown in Figures 1 to 12, it is a preferred embodiment of the present invention. In this embodiment, the rocking tricycle includes a body 1 and a rocking mechanism R, wherein the body 1 has a frame 11, which is movably connected to the frame. Two first wheels 13 on the front end of the frame 11 and a second wheel 14 movably connected to the rear end of the frame 11 .

Generally speaking, a handlebar 112 is provided on the frame 11 , and the steering of the vehicle body 1 is realized by the steering mechanism 7 . Specifically, the steering mechanism 7 in this embodiment includes a steering seat 71 and a steering rod 72. The power input end of the steering seat 71 is connected to the output end of the handlebar 112 and can rotate synchronously with the handlebar 112. The steering rod 72 has Two, one end of each steering rod 72 is connected to the corresponding side of the steering seat 71, and the other end is connected to the rear side of the corresponding first wheel 13, and under the rotation of the steering seat 71, the steering rod 72 drives the first wheel 13 is deflected towards the turning side, and the deflection axis of the first wheel 13 extends vertically. The above steering mechanism is a conventional configuration of a tricycle, and will not be described here.

When turning, the deflection and inclination of the body 1 is realized by the rocking mechanism R, which is arranged between the two first wheels 13 , and specifically includes a first link 2 and a second link 3 , wherein the first link 2 and the second link 3 are included. The middle part of the connecting rod 2 is rotatably constrained on the frame 11 , the rotation axis of the first connecting rod 2 is consistent with the extending direction of the frame 11 , and the two ends can be respectively left or right relative to the first wheel 13 . The second link 3 is arranged under the frame 11 and the middle part is rotatably constrained on the frame 11, and the rotation axis of the second link 3 is the same as that of the first link 2. The rotation axis is arranged in parallel up and down and can be displaced relative to the left and right, and the two ends are connected to the first wheel 13 so as to be deflected to the left or right relative to the first wheel 13 respectively, and the two ends of the second link 3 are also always located in the first wheel 13. Below both ends of a connecting rod 2 . In addition, the swing type tricycle mentioned in this embodiment also includes a box 12 , which is mounted on the frame 1 and located between the two first wheels 13 above the center rod 11 a of the frame 1 .

It is precisely because of the connection method of the first link 2 and the second link 3 in the rocking mechanism R that the body 1 is tilted when turning, and thus has a smaller turning radius, that is, when the body 1 is in a tilted state, the first The connecting rod 2 and the second connecting rod 3 can rotate around the rotation axis of the middle of each, and move to the left or right side in a staggered manner and approach up and down. The rotation of the two connecting rods enables the ends of the first connecting rod 2 and the second connecting rod 3 to move left or right, and the ends of the two connecting rods can also deflect up and down relative to the first wheel 13, for example, When the first link 2 moves to the left relative to the second link 3, the second link 3 moves to the right, so as to drive the upper part of the first wheel 13 to deflect toward the inclined side and the lower part to reversely deflect toward the inclined side, In turn, the two first wheels 13 are driven to automatically adjust to a state of being inclined on the same side as the vehicle body 1 , as shown in FIGS. 11 and 12 .

Specifically, the above-mentioned first connecting rod 2 and second connecting rod 3 are constrained on the frame 11 through the connecting seat 4 , and the connecting seat 4 basically extends vertically, wherein the frame 11 passes through the connecting seat 4 . In the middle part, the rotation of the middle part of the first link 2 is constrained to the upper end of the connection seat 4 , and the rotation of the middle part of the second link 3 is constrained to the lower end of the connection seat 4 . The connecting seat 4 in this embodiment specifically includes two connecting pieces 41 arranged at intervals along the extending direction of the vehicle frame 11 . A first shaft sleeve 20 matching the first rotating shaft 4a; a second rotating shaft 4b is provided between the lower ends of the two connecting pieces 41, and a second shaft sleeve matching the second rotating shaft 4b is provided in the middle of the second connecting rod 3 30. In addition, in order to prevent the first connecting rod 2 from colliding with the box 12 when moving, the above-mentioned first connecting rod 2 has two auxiliary rods 21 distributed on both sides of the first bushing 20 , and each auxiliary rod 21 is in the shape of two auxiliary rods 21 . The two ends of the arc structure are upwardly curved, so as to form an escape notch 22 in the middle for avoiding the bottom of the bucket 12 . When the tricycle is running and the body 1 is in a non-inclined state, the two first wheels 13 are in a vertical state, the rotation axis of the first link 2, the rotation axis of the second link 3 and the center rod 11a of the frame 11 Located on the same vertical plane, the first connecting rod 2, the second connecting rod 3 and the two supporting bases 5 form a rectangle, and the connecting piece 41 is also in a vertical state.

The assembly form of the first wheel 13 and the first link 2 and the second link 3 will inevitably affect the tilting effect of the vehicle body 1. In this embodiment, the ends of the first link 2 and the second link 3 The two supporting bases 5 and the first connecting rod 2 and the second connecting rod 3 together form a stable parallelogram, so that the first connecting rod 2. The staggered lateral movement of the second link 3 is more stable.

In this embodiment, the above-mentioned support base 5 includes a first support piece 51 arranged adjacent to the first link 2 and the second link 3 and a second support piece 52 arranged adjacent to the first wheel 13 . The first link The end of 2 is connected to the upper end of the first support piece 51, the second link 3 is connected to the lower end of the first support piece 51, the second support piece 52 is arranged at one end of the axle 53, and the first wheel 13 is installed on the axle 53 the other end of the . In addition, in order to compensate for the stroke difference generated when the first wheel 13 is tilted, the above-mentioned first support piece 51 and the second support piece 52 are movably connected together by a joint bearing 54 , and the joint bearing 54 includes a bearing outer ring 541 And the ball head 542 embedded in the bearing outer ring 541 , the bearing outer ring 541 is connected to the first support piece 51 , and the ball head 542 is connected to the second support piece 52 .

In order to control the inclination state of the vehicle body 1 so that the vehicle body 1 can maintain a vertical state or a state of free inclination, the rocking tricycle further includes a limiting mechanism 6 . Specifically, the limiting mechanism 6 includes a first limiting piece 61 , a second limiting piece 62 and a limiting rod 63 . The first limiting piece 61 is arranged on the first connecting rod 2 , and a limiting opening 610 is formed on the first limiting piece 61 along the extending direction of the vehicle frame 11 . The second limiting piece 62 is arranged at intervals from the first limiting piece 61 . There is a limit slot 620 penetrating along the extension direction of the frame 11 and extending along the swing direction of the first link 2 . The limit rod 63 is connected to the frame 11 and arranged to go back and forth along the extension direction of the frame 11 . Move to be alternately limited in the limit opening 610 or the limit groove 620 . In the state where the limit rod 63 is moved to the limit within the limit opening 610 , the vehicle body 1 can be kept in the first use state (vertical state), at this time, the two first wheels 13 are both in the vertical state, and the vehicle body 1 is in the vertical state. It is controlled to prevent it from tilting, which is to avoid accidental tilting of the body caused by false triggering; when the limit rod 63 is moved to the state where it is limited to the limit slot 620, the body 1 is in the second use state (the state of free tilting), at this time The rocking mechanism R is free to move, and the two first wheels 13 are free to tilt, that is, the body 1 is free to tilt. In this way, by operating the positional relationship between the limit rod 63 and the two limit pieces, so that the limit rod 63 is located in the limit opening 610 or the limit groove 620, the control switching of the tilt state of the vehicle body 1 can be easily realized.

Specifically, the first end of the frame 11 in this embodiment is provided with a vertically extending bracket 111 at a position adjacent to the end, and the limit rod 63 is mounted on the bracket 111 through the sleeve 64 , and the first limit The position piece 61 and the second limit piece 62 are both located between the two connection pieces 41 , and the limit rod 63 is arranged outside the two connection pieces 41 and can face the first limit piece 61 and the second limit piece 62 direction move. The longitudinal section of the above-mentioned limit slot 620 is an arc structure with both ends bent upward, and when the vehicle body 1 is inclined to the left or right, the first link 2 and the vehicle body 1 swing synchronously, so that the limit rod 63 abuts against the corresponding end walls at both ends of the limiting groove 620, thereby forming a limiting position for the body 1 to tilt on this side.

In addition, in order to realize the automatic reset of the limit rod 63, the limit mechanism 6 further includes an elastic member 65, and the power output end of the elastic member 65 acts on the limit rod 63, so that the limit rod 63 always has a direction toward the first limit The direction of movement of the position piece 61 and the second limit piece 62 . The limiting rod 63 is at least partially located in one of the ends of the sleeve 64, the other end of the sleeve 64 is provided with a locking end 66, the elastic member 65 is arranged in the sleeve 64, and the two ends are respectively connected with the locking end 66 and the locking end 66. The limit rods 63 are in contact with each other.

In order to realize the switching of the inclined state of the vehicle body 1 at a convenient position of the vehicle body 1, the above-mentioned limit mechanism 6 further includes a trigger member 67, and the power output end of the trigger member 67 acts on the limit rod 63, and can make the limit The rod 63 moves in a direction away from the first limiting piece 61 and the second limiting piece 62 , so that the elastic member 65 is in an energy storage state. The frame 11 is provided with a handlebar 112 , a switch is provided on the handlebar 112 , and the trigger 67 is a traction rope whose one end is connected to the limit rod 63 and the other end is connected to the switch.

In the description and claims of the present invention, directional terms such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "Bottom," etc., are used to describe various example structural parts and elements of the invention, but these terms are used herein for convenience of description and based on the example orientations shown in the accompanying drawings. Since the disclosed embodiments of the present invention can be arranged in different directions, these directional terms are for illustration only and should not be regarded as limiting, such as "up" and "down" are not necessarily defined as being opposite to the direction of gravity or consistent direction.

Claims

A swinging tricycle comprising:

A body (1) has a frame (11), two first wheels (13) movably connected to the front end of the frame (11), and a second wheel (14) movably connected to the rear end of the frame (11) ;

It is characterized in that a rocking mechanism (R) is provided between the two first wheels (13), and the rocking mechanism includes:

a first connecting rod (2), the middle of which is rotatably constrained on the frame (11), the rotation axis of the first connecting rod (2) is consistent with the extending direction of the frame (11), and The two ends are respectively connected to the first wheel (13) so as to be deflectable to the left or right relative to the first wheel (13);

The second connecting rod (3) is arranged below the frame (11) and the middle part is rotatably constrained on the frame (11), the rotation axis of the second connecting rod (3) and the first The rotation axis of a connecting rod (2) is arranged in parallel up and down and can be displaced relative to the left and right, and the two ends are respectively connected to the first wheel (13) so as to be deflected to the left or right relative to the first wheel (13), and the third Both ends of the second connecting rod (3) are also always located below both ends of the first connecting rod (2);

When the vehicle body (1) is in a tilted state, the first connecting rod (2) and the second connecting rod (3) can rotate around the rotation axis of their respective middle parts, and move to the left or right in a staggered manner. and approach up and down.
The swing type tricycle according to claim 1, characterized in that: it further comprises a connecting seat (4) extending up and down, the frame (11) is penetrated in the middle of the connecting seat (4), and the first The middle part of the connecting rod (2) is constrained to rotate on the upper end of the connecting seat (4), and the middle part of the second connecting rod (3) is constrained to rotate on the lower end of the connecting seat (4).
The swing type tricycle according to claim 2, characterized in that: the connecting seat (4) comprises two connecting pieces (41) arranged at intervals along the extending direction of the frame (11), and the two connecting pieces (41) A first shaft (4a) is arranged between the upper ends of the ), and the first connecting rod (2) is provided with a first bushing (20) in the middle that matches the first shaft (4a); A second rotating shaft (4b) is provided between the lower ends of the plates (41), and a second shaft sleeve (30) matching the second rotating shaft (4b) is provided in the middle of the second connecting rod (3).
The swing type tricycle according to claim 3, characterized in that: the first connecting rod (2) has two auxiliary rods (21) distributed on both sides of the first bushing (20), and each The auxiliary rod (21) is in an arc-shaped structure with both ends bent upwards, so that a gap (22) for avoiding the bottom of the box (12) is formed in the middle.
The swing type tricycle according to any one of claims 1 to 4, characterized in that: a vertically arranged support seat (5) is provided on the axle (53) of each first wheel (13), and the axle ( 53) It is rotatable relative to the support base (5), and the end of the first link (2) and the end of the second link (3) are respectively rotatably connected to the upper and lower parts of the support base (5).
The rocking tricycle according to claim 5, characterized in that: the support base (5) comprises a first support piece (51) arranged adjacent to the first link (2) and the second link (3), and a first support piece (51) adjacent to the first link (2) and the second link (3). A second support piece (52) arranged corresponding to the first wheel (13), the end of the first link (2) is connected to the upper end of the first support piece (51), and the second link (3) Connected to the lower end of the first support piece (51), the second support piece (52) is arranged on one end of the axle (53), and the first wheel (13) is mounted on the other end of the axle (53).
The swing type tricycle according to claim 6, wherein the first support piece (51) and the second support piece (52) are movably connected together through a joint bearing (54), and the joint bearing (54) comprises a bearing outer ring (541) and a ball head (542) embedded in the bearing outer ring (541), the bearing outer ring (541) is connected to the first support sheet (51), so The ball head (542) is connected to the second support piece (52).
The swing type tricycle according to claim 3, characterized in that: it further comprises a limiting mechanism (6), and the limiting mechanism (6) comprises:

The first limiting piece (61) is arranged on the first connecting rod (2), and a limiting opening (610) which penetrates along the extending direction of the vehicle frame (11) is opened on the first connecting rod (2);

The second limiting piece (62) is arranged at an interval from the first limiting piece (61), and is provided with a second limiting piece (62) extending along the extending direction of the vehicle frame (11) and extending along the swinging direction of the first link (2). Limit slot (620);

The limit rod (63) is connected to the frame (11), and is arranged to move back and forth along the extension direction of the frame (11), so as to be alternately limited in the limit opening (610) or the limit groove ( 620);

When the limiting rod (63) moves to a state where it is limited within the limiting opening (610), the vehicle body (1) is in a first use state;

When the limiting rod (63) is moved to a state where it is limited within the limiting groove (620), the vehicle body (1) is in a second use state.
The swing type tricycle according to claim 8, characterized in that: the first end of the frame (11) is provided with a vertically extending bracket (111) at a position adjacent to the end, and the limit rod (63) ) is mounted on the bracket (111) through the sleeve (64), and the first limiting piece (61) and the second limiting piece (62) are both located between the two connecting pieces (41), The limiting rod (63) is arranged outside the two connecting pieces (41), and can move toward the direction of the first limiting piece (61) and the second limiting piece (62).
The swing type tricycle according to claim 9, characterized in that: the longitudinal section of the limiting groove (620) is an arc-shaped structure with both ends bent upward, and is in the left or right side of the vehicle body (1). In the inclined state, the first link (2) swings synchronously with the vehicle body (1), so that the limit rod (63) is in contact with the corresponding end walls at both ends of the limit groove (620), This further forms a limit for the inclination of the vehicle body (1) on this side.
The swing type tricycle according to claim 10, characterized in that: the limiting mechanism (6) further comprises an elastic member (65), and the power output end of the elastic member (65) acts on the limiting rod (63), so that the limit rod (63) always has a tendency to move toward the direction of the first limit piece (61) and the second limit piece (62).
The rocking tricycle according to claim 11, wherein the limiting rod (63) is at least partially located in one end of the sleeve (64), and the other end of the sleeve (64) is provided with There is a locking end (66), the elastic piece (65) is arranged in the sleeve (64), and the two ends are respectively abutted against the locking end (66) and the limit rod (63).
The swing type tricycle according to claim 8, characterized in that: the limit mechanism (6) further comprises a trigger (67), and the power output end of the trigger (67) acts on the limit rod (63), and can move the limit rod (63) away from the first limit piece (61) and the second limit piece (62), so that the elastic member (65) is in the storage able state.
The swing type tricycle according to claim 13, characterized in that: the frame (11) is provided with a handlebar (112), the handlebar (112) is provided with a switch, and the trigger (67) It is a traction rope whose one end is connected to the limit rod (63) and the other end is connected to the switch.
The swing type tricycle according to claim 14, characterized in that: further comprising a steering mechanism (7), the steering mechanism (7) comprising a steering seat (71) and a steering rod (72), the steering seat (71) The power input end of ) is connected with the output end of the handlebar (112), and can rotate synchronously with the handlebar (112). There are two steering rods (72), one for each steering rod (72). One end of ) is connected to the corresponding side of the steering seat (71), the other end is connected to the rear side of the corresponding first wheel (13), and under the rotation of the steering seat (71), the steering The rod (72) drives the first wheel (13) to deflect toward the turning side, and the deflection axis of the first wheel (13) extends vertically.