CN209321156U - The attachment device of rear-wheel steering bicycle - Google Patents

Abstract

A kind of attachment device of rear-wheel steering bicycle includes steering unit and connection unit.The steering unit includes rear-wheel wheel carrier, the connection rear-wheel wheel carrier and restricts along the mandrel that first axle upwardly extends, the steering base being set at the top of the mandrel and two drivings, and is convexly equipped in the thrust block seat of the mandrel.The connection unit includes the casing that coaxial sleeve is set to the mandrel, two extension bars, and multiple fixing pieces, the mandrel can be rotated relative to described sleeve pipe, described sleeve pipe bottom end bears against the thrust block seat and has the flange outwardly protruded, there are two be located at breasting face that is coplanar and being suitable for setting parallel to the ground for the flange tool, the first axle presss from both sides acute angle with the breasting face forward, each extension bar extends forward along the second axis of the vertical first axle, and there is the lower end surface for being abutted against respective breasting face, the fixing piece is arranged in the flange and the extension bar.Whereby, the smooth degree of the steering unit when rotated can be improved.

Description

The attachment device of rear-wheel steering bicycle

Technical field

The utility model relates to a kind of attachment devices of bicycle, more particularly to a kind of connection of rear-wheel steering bicycle Device.

Background technique

Refering to fig. 1, before a kind of existing rear-wheel steering bicycle 9, including vehicle frame 91, the one connection vehicle frames 91 Wheel carrier 94, one of steering base 93, the one connection steering bases 93 of 92, one, faucet connection 91 rear ends of vehicle frame at end The rear-wheel 95 of the wheel carrier 94 and the driving rope 96 of two connection steering bases 93 and described leading 92 are connected, when the dragon When first 92 swing, described leading 92 can draw the driving rope 96, rotate the steering base 93, to drive wheel carrier 94 and rear-wheel 95 turn to.However compared to the bicycle of front-wheel steer, the bicycle 9 of such rear-axle steering is when turning to, due to the faucet 92 can not directly drive the wheel carrier 94 and rear-wheel 95 to turn to, and the wheel carrier 94 links the rear-wheel 95 in state perpendicular to the ground It will affect the driving of steering, therefore, pacify if the rear-wheel 95 is diverted through previous bicycle front fork in an inclination angle mode Dress, although being easier in driving, will cause instead road holding it is insufficient and can not equilibrium problem.

Summary of the invention

The purpose of this utility model is to provide a kind of attachment devices of rear-wheel steering bicycle conducive to rear-axle steering.

The attachment device of the rear-wheel steering bicycle of the utility model includes steering unit and connection unit.

The steering unit include be suitable for the rear-wheel wheel carrier that rear-wheel is arranged with being able to rotate, the connection rear-wheel wheel carrier and Along the mandrel that first axle upwardly extends, the steering base being set at the top of the mandrel, it is set to the mandrel bottom end and around institute First axle is stated by two opposite sides of the thrust block seat of the mandrel outwardly extended and two connection steering bases and The driving rope that the steering base can be driven to rotate around the first axle by external force.

The connection unit includes being sheathed on the mandrel and along described in the casing of first axle extension, two connections Casing and it is suitable for the extension bar of connecting vehicle frame and multiple fixing pieces that the extension bar is fixed on to described sleeve pipe forward, the set Tube bottom end bears against the thrust block seat, and the mandrel can be rotated relative to described sleeve pipe around the first axle, described sleeve pipe tool Have around the first axle and the flange that outwardly protrudes, there are two is positioned essentially at coplanar and supplies the extension bar for the flange tool The breasting face of breasting, the first axle presss from both sides acute angle with the breasting face forward, and the breasting face is suitable for putting down with ground Row setting, each extension bar extend forward along the second axis of the vertical first axle, and each extension bar have it is parallel and It is abutted against the lower end surface in respective breasting face, and the upper surface of the parallel second axis, the fixing piece are arranged in corresponding hold By face and corresponding lower end surface.

The attachment device of the rear-wheel steering bicycle of the utility model, the connection unit further includes bearing part group, described Bearing part group has multiple transverse bearings being set between the mandrel and described sleeve pipe.

The bearing part group of the attachment device of the rear-wheel steering bicycle of the utility model, the connection unit also has Thrust bearing between the thrust block seat and described sleeve pipe bottom end.

The attachment device of the rear-wheel steering bicycle of the utility model, the fixing piece of the connection unit are bolt, And the fixing piece is upward through the flange and screw lock by the bottom of the flange along the direction that first axis extends In corresponding extension bar.

The attachment device of the rear-wheel steering bicycle of the utility model, there are two the described sleeve pipe of the connection unit also has The abutment surfaces upwardly extended respectively by the inner edge in the breasting face, the parallel first article of axis of the abutment surfaces and the liang described A axis, each extension bar also have the medial surface for being abutted against respective abutment surfaces.

The beneficial effect of the utility model is: the acute angle is pressed from both sides using the first axle and the breasting face, and The breasting face is suitable for being arranged in parallel with the ground, grabs ground effect when increasing riding, and improve the steering unit Smooth degree when driving the rear-wheel to rotate.

Detailed description of the invention

Other features and effect of the utility model will be clearly presented in the embodiment referring to schema, in which:

Fig. 1 is a kind of one side schematic view of existing rear-wheel steering bicycle；

Fig. 2 is the side view diagram of one embodiment of the attachment device of the utility model rear-wheel steering bicycle；

Fig. 3 is a rearview of the embodiment；And

Fig. 4 is a top view of the vertical first axle of the embodiment, illustrates a steering of the embodiment Seat is driven a state when rear-axle steering by two driving wire saws.

Specific embodiment

Refering to Fig. 2 to Fig. 4, one embodiment of the attachment device of the utility model rear-wheel steering bicycle is suitable for connecting A rear-wheel 3 and a vehicle frame (not shown) are connect, the attachment device includes a steering unit 1 and a connection unit 2.

The steering unit 1 includes one and is suitable for 11, companies of rear-wheel wheel carrier that the rear-wheel 3 is arranged with being able to rotate It connects the rear-wheel wheel carrier 11 and upwardly extend along a first axle L1 mandrel 12, one is set to 12 top of mandrel Steering base 13, one are set to 12 bottom end of mandrel and outwardly the prolonging by the mandrel 12 around the first axle L1 Two opposite sides of the thrust block seat 15 stretched and two connection steering bases 13 and the steering base 13 can be driven around described by external force The driving rope 14 of first axle L1 rotation.

The connection unit 2 includes one and is sheathed on the mandrel 12 and is located at the steering base 13 and the thrust block seat 15 Between casing 21, two connection described sleeve pipes 21 and be suitable for connecting forward the extension bar 22, multiple by the extension bar of the vehicle frame 22 are fixed on the fixing piece 23 of described sleeve pipe 21 and a bearing part group 24.

Described sleeve pipe 21 extends along the first axle L1, and described sleeve pipe 21 have one around the first axle L1 and The flange 211 outwardly protruded and two abutment surfaces 212.There are two be positioned essentially at described in coplanar and confession for the tool of flange 211 The breasting face 213 that extension bar 22 is born against, the first axle L1 presss from both sides an acute angle theta with the breasting face 213 forward, and described holds It is suitable for being arranged in parallel with a ground S by face 213.Define a vertical first axle L1 and towards before the bicycle The second axis L2 that rear direction extends.The abutment surfaces 212 are upwardly extended by the inner edge in the breasting face 213 respectively, described to lean on The parallel first axle L1 and second axis L2 of junction 212.The mandrel 12 can be relative to described sleeve pipe 21 around described First axle L1 rotation.

Each extension bar 22 extends forward along the second axis L2, and each extension bar 22 has one in parallel and is abutted against The upper surface 222 of the parallel second axis L2 in lower end surface 221, one in respective breasting face 213 and one connection it is described on End face 222 and the lower end surface 221 and the medial surface 223 for being abutted against respective abutment surfaces 212.

The fixing piece 23 is for bolt and upward by the bottom of the flange 211 along the direction that the first axle L1 extends Across the flange 211 and it is screw-locked at corresponding extension bar 22.

The bearing part group 24 has multiple transverse bearings 241 being set between the mandrel 12 and described sleeve pipe 21, An and thrust bearing 242 between 21 bottom end of the thrust block seat 15 and described sleeve pipe.

When in use, a leading (not shown) of the 14 connection bicycles of driving rope, and the extension bar 22 to The preceding connection vehicle frame, and the breasting face 213 and ground S is arranged in parallel.And the faucet will drive institute in rotation It states the 14 traction steering base 13 of driving rope to rotate around the first axle L1, and interlocks the mandrel 12 and the rear-wheel wheel carrier 11 rotations, to drive the rear-wheel 3 to turn to (see Fig. 4).

The breasting face 213 is arranged in parallel with the ground S when due to using, the first axle L1, the set Pipe 21 and the mandrel 12 can press from both sides the acute angle theta with the ground S forward, compared to the vertical ground the first axle L1 S can be such that the distance between the rear-wheel 3 and the center of gravity of the bicycle increases, so that the rear-wheel 3 is applied to describedly The positive force of face S is smaller, to reduce the frictional force when rear-wheel 3 turns between the S of ground, thus smooth when improving steering Degree.In addition, in the present embodiment, the ground S is along the first axle compared to the first axle L1 vertical ground S L1 acts on described sleeve pipe 21 and the reaction force of the mandrel 12 can be smaller, and then makes described sleeve pipe 21 and the thrust block seat 15 Between pressure it is smaller, in this way, when the mandrel 12 is rotated around the first axle L1, described sleeve pipe 21 and the thrust block seat Power of rubbing between 15 is smaller, and is conducive to the mandrel 12 and rotates.

In addition, passing through the breasting face 213 of described sleeve pipe 21 and the lower end surface 221 of the extension bar 22 and the ground S In parallel, the second axis all parallel compared to the breasting face 213, the lower end surface 221 of the extension bar 22 and upper surface 222 L2 can be such that the rear end of the extension bar 22 is not easy along the second axis L2 forward slip, and then avoid 23 stress of fixing piece The concentricity of described sleeve pipe 21 Yu the mandrel 12 is deformed and influenced, to influence the rotation of the mandrel 12, and can increase and ride That takes the opportunity grabs ground effect.

In addition, by the thrust bearing 242 weight bearing along the first axis L1 can be born, and be further reduced institute When stating mandrel 12 and being rotated relative to described sleeve pipe 21, frictional force between described sleeve pipe 21 and the thrust block seat 15, and it is conducive to institute State the rotation of mandrel 12.

In conclusion the attachment device of the utility model rear-wheel steering bicycle, by the first axle L1 with it is described Breasting face 213 presss from both sides the acute angle theta, and the breasting face 213 is suitable for being arranged in parallel with the ground S, when being rided with increasing Ground effect is grabbed, and smooth degree of the steering unit 1 when driving the rear-wheel 3 to rotate can be improved, so this can be reached really The purpose of utility model.

As described above, only the embodiments of the present invention, when the utility model implementation cannot be limited with this Range, i.e., it is all according to simple equivalent changes and modifications made by the utility model claims book and description, all still belong to The scope of the utility model.

Claims (5)

1. a kind of attachment device of rear-wheel steering bicycle, it is characterised in that: include:

Steering unit, including being suitable for the rear-wheel wheel carrier that rear-wheel is arranged with being able to rotate, the connection rear-wheel wheel carrier and along first Mandrel that axis upwardly extends, is set to the mandrel bottom end and around described first at the steering base being set at the top of the mandrel Axis is by two opposite sides of the thrust block seat of the mandrel outwardly extended and two connection steering bases and can be by outer The driving rope that power drives the steering base to rotate around the first axle；And

Connection unit, including be sheathed on the mandrel and along the first axle extend casing, two connection described sleeve pipes and Suitable for the extension bar and multiple fixing pieces that the extension bar is fixed on to described sleeve pipe of connecting vehicle frame forward, described sleeve pipe bottom end The thrust block seat is born against, the mandrel can be rotated relative to described sleeve pipe around the first axle, and described sleeve pipe has around institute The flange stating first axle and outwardly protruding, the flange tool are coplanar and for extension bar breasting there are two being positioned essentially at Breasting face, the first axle presss from both sides acute angle with the breasting face forward, and the breasting face is suitable for setting parallel to the ground, Each extension bar extends forward along the second axis of the vertical first axle, and each extension bar has parallel and is abutted against respectively Breasting face lower end surface, and the upper surface of the parallel second axis, the fixing piece is arranged in corresponding breasting face and right The lower end surface answered.

2. the attachment device of rear-wheel steering bicycle according to claim 1, it is characterised in that: the connection unit also wraps Bearing part group is included, the bearing part group has multiple transverse bearings being set between the mandrel and described sleeve pipe.

3. the attachment device of rear-wheel steering bicycle according to claim 2, it is characterised in that: the institute of the connection unit State bearing part group also and have the thrust bearing between the thrust block seat and described sleeve pipe bottom end.

4. the attachment device of rear-wheel steering bicycle according to claim 1, it is characterised in that: the institute of the connection unit Stating fixing piece is bolt, and the fixing piece is upward through institute by the bottom of the flange along the direction that the first axle extends It states flange and is screw-locked at corresponding extension bar.

5. the attachment device of rear-wheel steering bicycle according to claim 1, it is characterised in that: the institute of the connection unit It states casing and also has that there are two the abutment surfaces that are upwardly extended respectively by the inner edge in the breasting face, the abutment surfaces parallel described first Axis and the second axis, each extension bar also have the medial surface for being abutted against respective abutment surfaces.