阅读说明：本技术 一种货运自行车的转向机构 (Steering mechanism of freight bicycle ) 是由 楼攀登 于 2019-12-02 设计创作，主要内容包括：本发明涉及一种货运自行车的转向机构,该货运自行车的转向机构,包括自前向后依次布置的前叉、转向杆和车把,转向杆的前端与前叉相连接,转向杆的后端具有用来与车把相连接、且随车把的转向而能前后以及上下摆动的摆动机构；本发明的优点在于：转向杆一端固定而另一端能上下和前后摆动的连接形式,不仅能将车把转向的动力准确而直接地传递至前叉处,还能确保在转向时摆动机构能够缓冲并平衡转向杆转向时所产生的上下位移,进而避免了货运自行车行进过程中产生抖动。(The invention relates to a steering mechanism of a freight bicycle, which comprises a front fork, a steering rod and a handlebar, wherein the front fork, the steering rod and the handlebar are sequentially arranged from front to back; the invention has the advantages that: the connecting form that one end of the steering rod is fixed and the other end can swing up and down and back and forth can not only accurately and directly transmit the power of steering of the handlebar to the front fork, but also ensure that the swing mechanism can buffer and balance the up and down displacement generated when the steering rod steers when the steering is carried out, thereby avoiding the shaking generated in the advancing process of the freight bicycle.)

1. A steering mechanism of a freight bicycle comprises a front fork (1), a steering rod (2) and a handlebar (3) which are sequentially arranged from front to back, and is characterized in that: the front end of the steering rod (2) is connected with the front fork (1), and the rear end of the steering rod (2) is provided with a swing mechanism (4) which is connected with the handlebar (3) and can swing back and forth and up and down along with the steering of the handlebar (3).

2. The steering mechanism according to claim 1, wherein: the swing mechanism (4) comprises a first swing assembly (41) and a second swing assembly (42) which are connected with the bottom of the handlebar (3), and the local part of the first swing assembly (41) is restricted at the rear end of the second swing assembly (42) and can drive the second swing assembly (42) and the steering rod (2) to synchronously swing back and forth under the driving of the handlebar (3); the second swinging assembly (42) is connected with the rear end of the steering rod (2), and the rear end of the steering rod (2) can swing back and forth and synchronously swing up and down relative to the first swinging assembly (41).

3. The steering mechanism according to claim 2, wherein: the second swing assembly (42) comprises a connecting piece (421) and a shaft sleeve (422), the connecting piece (421) is inserted into the rear end of the steering rod (2) and is partially exposed, at least part of the shaft sleeve (422) is arranged side by side with the connecting piece (421), and the shaft sleeve (422) is rotatably connected to the connecting piece (421) through a pin shaft (423) which is sequentially arranged on the front part of the shaft sleeve (422) and the connecting piece (421).

4. The steering mechanism of claim 3, wherein: the shaft sleeve (422) comprises a shaft sleeve body (4221) and a connecting part (4222) which is provided with the shaft sleeve body (4221) and extends forwards, and the pin shaft (423) penetrates through the connecting part (4222).

5. The steering mechanism according to any one of claims 3 or 4, wherein: first swing subassembly (41) include pendulum rod (411) and pivot (412), pendulum rod (411) one end is fixed in handlebar (3) bottom, and the other end is connected on pivot (412), pivot (412) can the pivoted wear to establish and restrict on axle sleeve (422).

6. The steering mechanism of claim 5, wherein: the swing rod (411) is connected to the upper end of the rotating shaft (412), and a locking piece (413) for limiting the rotating shaft (412) to be separated from the shaft sleeve (422) is further arranged at the lower end of the rotating shaft (412).

7. The steering mechanism according to claim 1, wherein: the steering rod (2) is arranged in an upward inclined mode from back to front.

Technical Field

The invention relates to the field of freight bicycles, in particular to a steering mechanism of a freight bicycle.

Background

The freight bicycle is a bicycle specially used for loading goods, has extremely high utilization rate and various structural forms in Europe, and is gradually accepted in China in recent years. The freight bicycle is different from a conventional bicycle in that a cargo compartment is arranged between a handle and a front fork, and the handle is rotated and controls a front wheel to swing through a connecting rod so as to realize steering.

The existing freight bicycle has two parts of steering, wherein one part is that a connecting rod is rotatably connected with a front fork, and the other part is that the connecting rod is rotatably connected with a handle, for example, Chinese patent application with the patent number of CN201780050791.0 discloses a bicycle conversion kit and a goods bicycle device, wherein two ends of the connecting rod of the bicycle are respectively rotatably connected with the front fork and the handle, and the rotation mode has great disadvantages: the connecting rod both ends are all unfixed for great shake can appear when riding in front wheel and front fork, causes to turn to the unstability, and long-term shake simultaneously can lead to producing the gap between the part, not only can produce great noise, has still left the potential safety hazard.

Disclosure of Invention

The invention aims to solve the technical problem of providing a steering mechanism of a freight bicycle, which is firm and stable in connection and is not easy to shake, aiming at the current situation of the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: the steering mechanism of the freight bicycle comprises a front fork, a steering rod and a handlebar which are sequentially arranged from front to back, wherein the front end of the steering rod is connected with the front fork, and the rear end of the steering rod is provided with a swinging mechanism which is connected with the handlebar and can swing back and forth and up and down along with the steering of the handlebar.

In order to ensure that steering can be realized by rotating the handlebar, the swing mechanism comprises a first swing assembly and a second swing assembly which are connected with the bottom of the handlebar, wherein part of the first swing assembly is restrained at the rear end of the second swing assembly and can drive the second swing assembly and the steering rod to synchronously swing back and forth under the driving of the handlebar; the second swing assembly is connected with the rear end of the steering rod, the rear end of the steering rod can swing up and down synchronously relative to the first swing assembly while swinging back and forth, so that when the handlebar is rotated, the first swing assembly can drive the steering rod to drive the front fork to deflect left and right to realize steering, and the up-and-down swing of the second swing assembly can compensate the up-and-down stroke difference generated by steering.

In order to ensure that the rear end of the steering rod can swing up and down relative to the first swing assembly to compensate the difference of the upper stroke and the lower stroke generated by steering, the second swing assembly comprises a connecting piece and a shaft sleeve, the connecting piece is inserted into the rear end of the steering rod, part of the connecting piece is exposed, at least part of the shaft sleeve is arranged side by side with the connecting piece, and the shaft sleeve is connected on the connecting piece in a rotating manner through pin shafts which are sequentially arranged on the front part of the shaft sleeve and the connecting piece in a penetrating manner.

Specifically, the axle sleeve includes the axle sleeve body and has the connecting portion that the axle sleeve body extends forward, the round pin axle is worn to establish on this connecting portion.

In order to ensure that the handlebar rotates and can drive the steering rod to swing back and forth, the first swing assembly comprises a swing rod and a rotating shaft, one end of the swing rod is fixed at the bottom of the handlebar, the other end of the swing rod is connected to the rotating shaft, and the rotating shaft can rotate to penetrate through and be constrained on the shaft sleeve.

In order to prevent the rotating shaft from slipping, the oscillating bar is connected to the upper end of the rotating shaft, and a locking piece for limiting the rotating shaft to be separated from the shaft sleeve is further arranged at the lower end of the rotating shaft.

In order to ensure that the steering rod can be attached to the front fork, the steering rod is arranged obliquely upward from the rear to the front.

Compared with the prior art, the invention has the advantages that: in the steering mechanism of the freight bicycle, two ends of a steering rod are respectively connected with a handlebar and a front fork, wherein the steering rod is connected with the front fork, and the steering rod is connected with the handlebar through a swinging mechanism which can swing back and forth and up and down relative to the handlebar along with the steering of the handlebar, so that one end of the steering rod is fixed, and the other end of the steering rod can swing up and down and back and forth, therefore, the power for steering the handlebar can be accurately and directly transmitted to the front fork, the swinging mechanism can also be ensured to buffer and balance up and down displacement generated when the steering rod steers during steering, and further, the freight bicycle is prevented from shaking during the advancing process.

Drawings

Fig. 1 is an overall mechanism schematic view of a steering mechanism in an embodiment of the invention;

FIG. 2 is a schematic view showing the overall structure of a steering column according to an embodiment of the present invention;

fig. 3 is an enlarged schematic view of a portion a of fig. 1.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 3, a preferred embodiment of the present invention is a steering mechanism of a cargo bicycle, in the present embodiment, the steering mechanism of the cargo bicycle comprises a front fork 1, a steering rod 2 and a handlebar 3, the front fork 1, the steering rod 2 and the handlebar 3 are arranged in sequence from front to back, wherein the handlebar 3 is used for steering the direction of the bicycle, a front wheel of the bicycle is connected to the front fork 1, the cargo bicycle is provided with a goods shelf for holding goods between the front fork 1 and the handlebar 3, the handlebar 3 cannot directly steer the front fork 1 due to the long goods shelf, but steering is realized by the steering rod 2 extending along the front and back of the cargo bicycle, wherein the steering rod 2 is inclined upwards from back to front, and the front end of the steering rod 2 is connected to the front fork 1.

In the present embodiment, in order to ensure that the steering operation of the handlebar 3 can be accurately transmitted to the front fork 1, the swing mechanism 4 is connected to the rear end of the steering rod 2, and the swing mechanism 4 is not only used for connecting the steering rod 2 and the handlebar 3, but also used for balancing the shaking generated during steering by swinging back and forth and up and down.

In the present embodiment, the swing mechanism 4 includes a first swing component 41 and a second swing component 42 connected to the bottom of the handlebar 3, and a part of the first swing component 41 is constrained at the rear end of the second swing component 42 and can drive the second swing component 42 and the steering rod 2 to swing back and forth synchronously under the driving of the handlebar 3; the second swing member 42 is connected to the rear end of the steering rod 2, and can swing the steering rod 2 back and forth and simultaneously swing the rear end up and down in synchronization with the first swing member 41.

The second swing assembly 42 includes a connecting member 421 and a shaft sleeve 422, the connecting member 421 is inserted into the rear end of the steering rod 2 and partially exposed, at least a part of the shaft sleeve 422 is arranged side by side with the connecting member 421, and the shaft sleeve 422 is rotatably connected to the connecting member 421 by a pin 423 sequentially penetrating the front part of the shaft sleeve 422 and the connecting member 421; the shaft sleeve 422 comprises a shaft sleeve body 4221 and a connecting part 4222 extending forwards from the shaft sleeve body 4221, and the pin 423 is arranged on the connecting part 4222 in a penetrating way; the first swing assembly 41 includes a swing rod 411 and a rotating shaft 412, one end of the swing rod 411 is fixed at the bottom of the handlebar 3, the other end of the swing rod 411 is connected to the rotating shaft 412, the rotating shaft 412 can rotatably penetrate and be constrained on a shaft sleeve 422, wherein the swing rod 411 is connected to the upper end of the rotating shaft 412, and a locking member 413 for limiting the rotating shaft 412 to be separated from the shaft sleeve 422 is further arranged at the lower end of the rotating shaft 412.