Rear wheel structure of manpower tricycle

Abstract

The utility model relates to the technical field of tricycles, and particularly discloses a manpower tricycle rear wheel structure which is provided with a frame, a rear wheel assembly is arranged at the rear end of the frame and comprises a driving shaft, ratchet wheel assemblies are symmetrically installed at the two ends of the driving shaft, each ratchet wheel assembly comprises a ratchet wheel, ratchets are arranged on the inner wall of each ratchet wheel, and an inner ring is installed in each ratchet wheel. Pawls corresponding to the ratchets are arranged on the outer wall of the inner ring, the driving shaft is installed in the inner ring, and a rear wheel is detachably installed on the ratchet wheel; when the rear wheel structure of the manpower tricycle turns, due to the fact that the stroke of the rear wheel on the inner side in the curve direction is smaller than that of the rear wheel on the outer side in the curve direction, under the action of the rear wheel structure, the rear wheel on the inner side in the curve direction can stop or slow down the rotating speed, and the rear wheel on the outer side can continue to rotate forwards or keep the original speed under inertia. Therefore, the travel difference of wheels on the inner side and the outer side of a curve is compensated, the turning process is easier and smoother, and the phenomena that a vehicle head seriously deflects towards one side and swings more rapidly are prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tricycle technical field, specifically speaking, especially a tricycle rear wheel structure. BACKGROUND

[0002] The tricycle is a kind of load-carrying tool that is widely used, and the traditional tricycle is rotated by the transmission chain driven by the pedal, so that the rear axle is rotated.

[0003] However, in the traditional tricycle, the two rear wheels are connected in a direct-drive manner with the rear axle, and when turning, especially sharp turning, the smaller the turning radius is, the longer the travel of the wheel body on the outside of the turning direction than the inside wheel body, since its structure is in a direct-drive manner, the pedal needs to be pedaled during turning, so that the tricycle is inclined to one side, the vehicle head swings more rapidly, and the driver needs more power to constantly correct and control the vehicle head direction to prevent the direction from being out of control or the vehicle from overturning. SUMMARY

[0004] In order to overcome the defects in the prior art, the utility model provides a tricycle rear wheel structure, which aims to solve the problems in the prior art.

[0005] The utility model solves the technical problems by adopting the following technical scheme: a tricycle rear wheel structure has a frame, a pedal is arranged on the frame, a rear wheel assembly is arranged at the rear end of the frame, the rear wheel assembly includes a drive shaft connected with the pedal, a ratchet assembly is symmetrically installed at both ends of the drive shaft, the ratchet assembly includes a ratchet, a ratchet tooth is arranged on the inner wall of the ratchet, an inner ring is installed in the ratchet, a pawl corresponding to the ratchet tooth is arranged on the outer wall of the inner ring, the drive shaft is installed in the inner ring, and a rear wheel is detachably installed on the ratchet.

[0006] In the above-mentioned tricycle rear wheel structure, the two ends of the drive shaft are provided with thread segments with opposite threads, and the inner wall of the inner ring is provided with internal threads matched with the thread segments.

[0007] In the above-mentioned tricycle rear wheel structure, the center of the rear wheel is connected with a center wheel through spokes, the outer wall of the ratchet is provided with a connecting ring, and the center wheel and the connecting ring are connected by bolts.

[0008] In the above-mentioned tricycle rear wheel structure, a drive wheel is fixedly installed on the drive shaft, and the pedal is in transmission connection with the drive wheel through a transmission chain.

[0009] The utility model discloses a beneficial effect lies in: when stepping on the pedal, through the driving axle and drive the inner ring rotation, utilize the ratchet pawl of inner ring outer wall and drive the ratchet wheel rotation to drive the rear wheel and go forward, when turning, especially sharp turn, because the rear wheel of the inside of the curve direction is less than the speed of the rear wheel of the outside, the rear wheel of the inside of the curve direction stops rotation, and the rear wheel of the outside can rotate and continue to go forward under inertia, thereby compensate the stroke of the inside and the outside of the curve, reach the process of turning more easily, prevent two rear wheels synchronous rotation and turn and lead to the vehicle head to one side deflection serious, the vehicle head swing more rapid phenomenon. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 It is the three-dimensional structure schematic view of the human power tricycle of this embodiment.

[0011] Fig. 2 It is the three-dimensional structure schematic view of the rear wheel assembly of this embodiment.

[0012] Fig. 3 It is the three-dimensional structure schematic view of the ratchet wheel assembly of this embodiment.

[0013] In the drawing: frame 1, pedal 2, rear wheel assembly 3, driving axle 4, driving wheel 5, ratchet wheel assembly 6, center wheel 7, rear wheel 8, ratchet wheel 9, connecting ring 10, ratchet tooth 11, inner ring 12, inner thread 13, ratchet pawl 14, transmission chain 15. DETAILED DESCRIPTION

[0014] The specific implementation of the utility model will be further explained below in combination with the drawings. It needs to be explained here that the explanation of these implementation is used to help understanding the utility model, but does not constitute the limitation to the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0015] Combination Figs. 1 to 3The embodiment is characterized in that when the pedal 2 is stepped on, the inner ring 12 is rotated through the driving shaft 4, the pawl 14 on the outer wall of the inner ring 12 drives the ratchet wheel 9 to rotate, thereby driving the rear wheel 8 to move forward, when turning, especially sharp turning, the speed of the rear wheel 8 on the inner side of the turning direction is smaller than that of the rear wheel 8 on the outer side, the rear wheel 8 on the inner side of the turning direction stops or slows down the rotating speed, while the rear wheel 8 on the outer side can continue to rotate and move forward under the inertia or keep the original speed, thereby compensating for the travel difference of the wheels on the inner and outer sides of the turning direction, achieving a more relaxed and smooth turning process, and preventing the vehicle head from being seriously inclined to one side and the vehicle head from swinging more rapidly due to the synchronous rotation of the two rear wheels.

[0016] The structure and principle of the ratchet teeth 11 and the pawl 14 are based on the engagement and disengagement of the pawl 14 and the ratchet wheel 9, and the one-way rotation action characteristics are realized, so that the inner ring 12 can drive the ratchet wheel 9 to rotate in one direction, and the ratchet wheel 9 will not rotate the inner ring 12 when reversely rotating.

[0017] It is worth noting that the two ends of the driving shaft 4 are provided with thread segments with opposite threads, and the inner wall of the inner ring 12 is provided with an inner thread 13 matched with the thread segments; the structure is simpler, the assembly is faster, at the same time, the center of the rear wheel 8 is connected with a center wheel 7 through spokes, the outer wall of the ratchet wheel 9 is provided with a connecting ring 10, and the center wheel 7 and the connecting ring 10 are connected through bolts, so that the structure of the entire rear wheel assembly is simpler.

[0018] The driving shaft 4 is fixedly installed with a driving wheel 5, the pedal 2 is in transmission connection with the driving wheel 5 through a transmission chain 15, the driver can drive the driving shaft 4 to rotate through stepping on the pedal 2, so that the two rear wheels 8 on the both sides of the driving shaft 4 rotate synchronously to move forward, when turning, the inner rear wheel 8 can stop rotating or rotate more slowly under the inertia, while the outer rear wheel 8 can continue to rotate and move forward relative to the inner ring 12 under the inertia, so that the two rear wheels 8 form a speed difference.

[0019] The embodiments of the utility model are described in detail in combination with the drawings, but the utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, and still fall within the protection scope of the utility model.

Claims

1. A human-powered tricycle rear wheel structure having a frame (1) provided with a footrest (2), the rear end of the frame (1) being provided with a rear wheel assembly (3), characterized in that, The rear wheel assembly (3) comprises a driving shaft (4) connected with the pedal (2), symmetrically installed with a ratchet wheel assembly (6) at both ends of the driving shaft (4), the ratchet wheel assembly (6) comprises a ratchet wheel (9), the inner wall of the ratchet wheel (9) is provided with a ratchet (11), the ratchet wheel (9) is internally provided with an inner ring (12), the outer wall of the inner ring (12) is provided with a pawl (14) corresponding to the ratchet (11), the driving shaft (4) is installed in the inner ring (12), and the rear wheel (8) is detachably installed on the ratchet wheel (9).

2. A human-powered tricycle rear wheel structure according to claim 1, characterized in that, The both ends of the driving shaft (4) are provided with threaded sections with opposite threads, and the inner wall of the inner ring (12) is provided with internal threads (13) matched with the threaded sections.

3. A human-powered tricycle rear wheel structure according to claim 1, characterized in that, The center of the rear wheel (8) is connected with a center wheel (7) through a spoke, the outer wall of the ratchet wheel (9) is provided with a connecting ring (10), and the center wheel (7) is connected with the connecting ring (10) through bolts.

4. A human-powered tricycle rear wheel structure according to claim 1, characterized in that, The driving shaft (4) is fixedly provided with a driving wheel (5), and the pedal (2) is in transmission connection with the driving wheel (5) through a transmission chain (15).

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