CN219904614U - Four-wheel bicycle - Google Patents

Abstract

The utility model belongs to the technical field of recreation equipment, and particularly relates to a four-wheel bicycle, which comprises a frame and a seat, wherein the seat is arranged at the end part of the frame, one end of the frame far away from the seat is symmetrically provided with driving wheels in a rotating way, a crank is arranged between two groups of driving wheels, a central shaft of the driving wheels is of a one-way ratchet structure, a seat support is arranged below the seat, the end part of the seat support is connected with the frame in a welding way, a steering support is welded at the rear part of the frame, a steering rear fork is rotationally connected at the lower part of the steering support, the steering rear fork is movably connected with the middle part of a steering swing arm through a pin shaft, and two ends of the steering swing arm are respectively provided with a rear wheel; the utility model discloses can carry out nimble control to the traveling and the steering of four-wheel bicycle when using, stability is good, control simply, easily go up the hand, can realize drift, get rid of interesting operation such as tail etc. when using on smooth ground and ice, and through crank direct drive, dependable performance, the fault rate is low.

Description

Four-wheel bicycle

Technical Field

The utility model relates to the technical field of recreation equipment, in particular to a four-wheel bicycle.

Background

Common four-wheel pedal type baby carrier structurally turns front wheels to rear wheels for driving, has complex transmission structure, poor safety and high failure rate, and is found through patent retrieval, and publication number: CN110435797a discloses a reversible four-wheel bicycle, and the reverse switching clutch device that sets up for the four-wheel bicycle can both advance with the operation of backing under the effect of forward rotation force and reverse rotation force, and the user need not to carry out operations such as hand push, thereby makes more convenient when the rider rides, and this reverse switching clutch device is under the switching of switching drive part for the rear wheel can be along the reverse rotation, has realized four-wheel bicycle's smooth reverse.

The existing four-wheel bicycle is controlled and turned through a steering wheel when in use, the steering wheel is not easy to control when a child is in use, meanwhile, the steering wheel is easy to collide with an operator, meanwhile, the bicycle is driven through a chain, clothes or other parts of the child body are easy to be twisted into the chain, the situation that the chain is broken when the chain is driven, and the problems of high danger, low reliability and the like when in use are caused.

Disclosure of Invention

Object of the utility model

In order to solve the technical problems in the background technology, the utility model provides a four-wheel bicycle, which can realize flexible steering through the operation of a left handle and a right handle when in use, can also carry out interesting operations such as drifting, tail flicking, in-situ turning and the like when in use on smooth ground and ice, and has high stability, balanced driving force and simple structure through crank and double-wheel transmission.

(II) technical scheme

In order to solve the technical problems, the utility model provides a four-wheel bicycle, wherein a seat is arranged at the end part of a frame;

the one end symmetry that the seat was kept away from to the frame rotates and is equipped with the drive wheel, two sets of install the crank between the drive wheel, the drive wheel axis is one-way ratchet structure, the seat below is equipped with the seat support, seat support tip links to each other with the frame welding, the rear portion welding of frame has the steering support, steering support lower part rotates and is connected with the back fork that turns to, turns to the back fork and turns to swing arm middle part and pass through loose pin swing joint, swing joint has the swing arm that turns to, a rear wheel is respectively installed at swing arm both ends that turns to, each movable mounting has a control handle about the frame, the control handle middle part is connected with the frame through the round pin axle, the bottom of controlling the handle about is respectively with its homonymy turn to swing arm activity link to each other.

Preferably, the lower part of the steering bracket is rotationally connected with a steering rear fork, and the lower end of the steering rear fork is provided with a splicing groove.

Preferably, the crank is rotatably provided with pedals, and the pedals are arranged in a staggered manner.

Preferably, brake handles are mounted on the tops of the control handles, and the brake handles are respectively connected with corresponding brake devices through brake cables.

Preferably, the rear wheels may be ordinary tires and may be rigid plastic tires.

Preferably, the steering swing arm is provided with a limiting device.

The technical scheme of the utility model has the following beneficial technical effects:

1. the utility model can respectively tread on the pedals, two ends of the crank are respectively connected with the driving wheels, the driving wheels can be driven to rotate through the crank when the pedals are tread, so that the four-wheel bicycle is driven to advance.

2. According to the steering swing arm, the steering swing arm is rotationally connected with the inserting groove in the inner cavity of the steering rear fork through the pin shaft, the two ends of the steering swing arm can swing up and down by taking the pin shaft as the axis, and when the steering swing arm runs on a non-paved road surface, two rear wheels can be always grounded, so that the possibility of rollover is reduced, and the trafficability and stability of the four-wheel bicycle in running are improved.

3. The upper part of the steering swing arm is provided with a limiting device which limits the steering angle of the rear wheel, so that the side turning of the vehicle and the locking of the steering pull rod are prevented.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of the present utility model;

FIG. 3 is a schematic view of a frame structure according to the present utility model;

FIG. 4 is a schematic view of another view of the frame according to the present utility model;

fig. 5 is a schematic view of a steering swing arm mounting structure of the present utility model.

Reference numerals:

1. a frame; 2. a seat; 3. a seat support; 4. a driving wheel; 5. a crank; 6. a foot pedal; 7. a steering bracket; 8. steering a rear fork; 9. a steering swing arm; 10. a rear wheel; 11. a control handle; 12. a pull rod; 13. a braking device; 14. a brake handle; 15. a lock nut.

Detailed Description

The objects, technical solutions and advantages of the present utility model will become more apparent by the following detailed description of the present utility model with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.

As shown in fig. 1 to 4, the four-wheel bicycle provided by the utility model comprises a frame 1 and a seat 2, wherein the seat 2 is arranged at the end part of the frame 1;

the one end symmetry rotation that seat 2 was kept away from to frame 1 is equipped with drive wheel 4, two sets of install crank 5 between the drive wheel 4, the axis is one-way ratchet structure in drive wheel 4, the seat 2 below is equipped with seat support 3, seat support 3 tip and frame 1 welding link to each other, seat support 3 runs through and peg graft and has turn to support 7, turn to support 7 bottom and run through seat support 3 and extend to frame 1 bottom, turn to support 7 swing joint has turn to swing arm 9, turn to swing arm 9 both ends rotation and be connected with rear wheel 10, frame 1 both sides activity is equipped with control handle 11, control handle 11 bottom swing joint has pull rod 12, the free end and the turn to swing arm 9 activity of pull rod 12 link to each other.

It should be noted that, seat support 3 is provided below seat 2, the tip of seat support 3 links to each other with frame 1 welding, can play the supporting role to seat 2 through seat support 3, children sit on seat 2, both feet can trample respectively on footboard 6, crank 5 both ends are connected with drive wheel 4 respectively, accessible crank 5 drives drive wheel 4 and rotates when trampling footboard 6, thereby drive four-wheel bicycle forward, owing to install one-way ratchet, can be under the motionless condition of footboard, through pulling back and forth to control handle 11, can drive respectively through pull rod 12 and turn to swing arm 9 and turn to the rear fork 8 and deflect as the axle center, thereby accessible rear wheel 10 control four-wheel bicycle turns to, realize drifting, make four-wheel bicycle more interesting when using.

As shown in fig. 3 and 4, the bottom of the steering bracket 7 is rotationally connected with a steering rear fork 8, an inner cavity of the steering rear fork 8 is provided with a splicing groove, and the steering swing arm 9 is movably installed in the splicing groove on the steering rear fork 8 through a rotating shaft.

The steering swing arm 9 is rotatably connected with the insertion groove in the inner cavity of the steering rear fork 8 through a rotating shaft, the two ends of the steering swing arm 9 can swing by taking the rotating shaft as the axle center, when the vehicle runs on a non-paved road, the rear wheel 10 can be well attached to the ground, and the operability of the vehicle running on a four-wheel bicycle can be improved.

As shown in fig. 3 and 4, the inner cavity at the top of the steering bracket 7 is of a hollow structure, and the locking nut 15 is connected with the top of the steering bracket 7 in a threaded manner.

It should be noted that, the top of the steering bracket 7 is a closed hollow structure, the rod body of the flag and other markers can be inserted into the top of the steering bracket 7, and the locking nut 15 can be rotated to squeeze the closed position, so that the rod body can be limited.

As shown in fig. 3 and 4, the crank 5 is rotatably provided with a pedal 6, and the pedal 6 is arranged in a staggered manner.

The contact area between the foot and the crank 5 can be increased by the foot pedal 6, so as to reduce the feeling of pressure on the foot during use.

As shown in fig. 3 and 4, the driving wheel 4 is provided with a braking device 13, the braking device 13 is installed at the axle center of the driving wheel 4, the top of the control handle 11 is provided with a braking handle 14, and the braking handles 14 are respectively connected with the corresponding braking devices 13 through braking wires.

It should be noted that, the brake handle 14 drives the brake device 13 to act through the brake pull wire, and the brake device 13 can brake the driving wheel 4, so that the safety in use can be improved.

The working principle and the using flow of the utility model are as follows: the seat support 3 is arranged below the seat 2, the end part of the seat support 3 is connected with the frame 1 in a welding way, the seat 2 can be supported through the seat support 3, children sit on the seat 2, feet can respectively tread on the pedals 6, two ends of the crank 5 are respectively connected with the driving wheels 4, the crank 5 can drive the driving wheels 4 to rotate when stepping on the pedals 6, thereby driving the four-wheel pedals to advance, one of the control handles 11 is pulled backwards and the other control handle 11 is pushed forwards, the steering swing arm 9 and the steering rear fork 8 are driven by the pull rod 12 to deflect by taking the axle center respectively, the steering swing arm 9 can rotate and connect with the inserting grooves in the inner cavity of the steering rear fork 8 by taking the rotating shaft as the axle center, the two ends of the steering swing arm 9 can swing by taking the rotating shaft as the axle center, the rear wheel 10 can be well attached to the ground when the pedals are not paved on the road, the control performance of the bicycle when the bicycle is in running, the top of the steering support 7 is a closed hollow structure, the rod body of a flag and other marker can be inserted into the top of the steering support 7, the steering handle is pushed forward, the steering handle can be pushed forward by the nut, the brake handle body can be pushed forward by the rod body through the rotating nuts 15, the pull rod body can be pushed by the brake cap 13, and the brake device can be pushed forward by the driving handle 13, and the brake device can be stopped by the brake device 13.

It is to be understood that the above-described embodiments of the present utility model are merely illustrative of or explanation of the principles of the present utility model and are in no way limiting of the utility model. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present utility model should be included in the scope of the present utility model. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims or the equivalents of such scope and boundary.

Claims (6)

1. Four-wheel bicycle comprising a frame (1) and a seat (2), characterized in that the seat (2) is arranged at the end of the frame (1);

the one end symmetry that seat (2) was kept away from to frame (1) rotates and is equipped with drive wheel (4), two sets of install crank (5) between drive wheel (4), drive wheel (4) axis is one-way ratchet structure, seat (2) below is equipped with seat support (3), seat support (3) tip and frame (1) welding link to each other, steering bracket (7) are welded at the rear portion of frame (1), steering bracket (7) rotate and are connected with steering back fork (8), steering back fork (8) and steering swing arm (9) middle part pass through round pin axle swing joint, steering swing arm (9) both ends respectively install a rear wheel (10), each movable mounting has one to control handle (11) about frame (1), control handle (11) middle part and frame (1) are connected through the round pin axle, control handle (11) bottom links to each other with its homonymous steering swing arm (9) activity respectively.

2. A four-wheel cycle as claimed in claim 1, wherein the steering bracket (7) is rotatably connected with a steering rear fork (8), and the lower end of the steering rear fork (8) is provided with a plugging slot.

3. A four-wheel cycle as claimed in claim 1, characterized in that said crank (5) is rotatably fitted with two pedals (6), said pedals (6) being staggered.

4. A four-wheel cycle as claimed in claim 1, wherein brake handles (14) are mounted on top of the steering handles (11), the brake handles (14) being connected to respective brake devices (13) by brake cables.

5. A four-wheel cycle as claimed in claim 1, wherein the rear wheel (10) may be a conventional tyre and may be a rigid plastic tyre.

6. A four-wheel cycle as claimed in claim 1, characterized in that the steering swing arm (9) is provided with a stop means.