CN211196501U

CN211196501U - Front-drive chainless mechanism of bicycle

Info

Publication number: CN211196501U
Application number: CN201922155467.4U
Authority: CN
Inventors: 彭少颜
Original assignee: Individual
Current assignee: Wang Fuquan
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-08-07
Anticipated expiration: 2029-12-04

Abstract

The utility model discloses a bicycle forerunner does not have chain mechanism relates to the bicycle field, including the center pin, drive gear, one way gear, hub shell and parallel gear, the drive gear suit just can not rotate for the center pin on the center pin, one way gear suit just can rotate for the center pin on the center pin, still be provided with the pawl on the one way gear, hub shell suit is on the center pin, the hub shell be provided with pawl complex ratchet so that the hub shell winds the one way rotation of center pin, parallel gear is fixed in on the bicycle frame to transmit drive gear's rotation to one way gear. The utility model discloses the structure is comparatively succinct, and occupation space is little.

Description

Front-drive chainless mechanism of bicycle

Technical Field

The utility model relates to a technical field of bicycle particularly, indicates a bicycle forerunner does not have chain mechanism.

Background

Compared with the traditional rear-drive mechanism, the front-drive mechanism of the bicycle can enable the center of gravity of a rider to move forwards, and reduces pressure on the hip. The structure of the existing front drive mechanism of the bicycle is complex, and the front drive mechanism of the bicycle is provided with a flywheel and other parts, so that the maintenance and the repair of the front drive mechanism are inconvenient, and meanwhile, the occupied space is large, and the structure of the bicycle is not compact enough.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at overcoming the not enough of prior art, provide a bicycle forerunner does not have chain mechanism to the problem that the bicycle forerunner does not have chain mechanism among the solution prior art needs to set up the flywheel and leads to the structure complicacy.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a thin wall motor casing's friction stir welding frock, include

A central shaft;

the transmission gear is sleeved on the central shaft and cannot rotate relative to the central shaft;

the one-way gear is sleeved on the central shaft and can rotate relative to the central shaft, and a pawl is further arranged on the one-way gear;

the hub shell is sleeved on the central shaft and is provided with a ratchet matched with the pawl so as to enable the hub shell to rotate around the central shaft in a single direction; and

and the parallel gear is fixed on the bicycle frame so as to transmit the rotation of the transmission gear to the one-way gear.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, the parallel gear comprises a first tooth part and a second tooth part which is positioned on one side of the first tooth part and shares a center axis with the first tooth part, the first tooth part is meshed with the transmission gear, and the second tooth part is meshed with the one-way gear.

Further, the one-way gear includes gear portion and installation department, the installation department sets up one side of gear portion and both are in the same axis, the pawl sets up on the anchor ring of installation department, the flower-drum shell will the installation department suit is including just the ratchet sets up the inner chamber of flower-drum shell.

Further, the pawl has a plurality of, and a plurality of the pawl is around the anchor ring of installation department interval sets up.

Furthermore, a positioning key is arranged between the transmission gear and the central shaft so that the transmission gear cannot rotate relative to the central shaft.

Furthermore, an inner snap spring is arranged between the one-way gear and the central shaft to position the one-way gear.

Further, the edge of the inner cavity of the hub shell is provided with an oil seal.

Further, a first bearing is arranged between the hub shell and the central shaft.

Further, the central shaft is provided with second bearings positioned on two sides of the hub shell.

Furthermore, a sleeve is sleeved on the central shaft, and the hub shell, the transmission gear and the one-way gear are sleeved on the sleeve.

Compared with the prior art, the utility model discloses the beneficial effect who has is:

the utility model provides a center pin is connected with the running-board of bicycle, can drive gear after the center pin rotates and rotate, parallel gear can transmit drive gear's rotation to one-way gear, because be provided with the pawl on the one-way gear, be provided with complex ratchet with it in the flower-drum shell, consequently can drive the rotation of flower-drum shell after the one-way gear rotates, thereby realize the bicycle drive, and the center pin reversal that pawl and ratchet complex structure also can make also is exactly that the flower-drum wheel can not reverse when the running-board reverses. The utility model discloses the structure is succinct, and occupation space is little.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the present invention.

Wherein the figures include the following reference numerals:

100-central axis; 110-a second bearing; 120-a cannula; 200-a drive gear; 210-an orientation key; 300-one-way gear; 310-a pawl; 320-clamp spring; 400-hub shell; 410-a ratchet; 420-oil seal; 430-a first bearing; 500-parallel gears; 510-a first tooth; 520-second tooth.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are merely exemplary of the invention and are not intended to be exhaustive. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1:

a bicycle front drive chainless mechanism comprises a central shaft 100, a transmission gear 200, a one-way gear 300, a hub shell 400 and a parallel gear 500, wherein the central shaft 100 passes through the center of a front wheel of a bicycle, pedals of the bicycle are connected to two ends of the central shaft 100, the central shaft 100 can be rotated by treading the pedals, the transmission gear 200 is sleeved on the central shaft 100 and the transmission gear 200 cannot rotate relative to the central shaft 100, so that the transmission gear 200 can rotate in the same direction after the central shaft 100 rotates, the one-way gear 300 is also arranged on the central shaft 100 and the one-way gear 300 can rotate relative to the central shaft 100, the one-way gear 300 is matched with the transmission gear 200 through the parallel gear 500, the transmission gear 200 can be driven to rotate after rotating, and therefore the parallel gear 500 has the function of enabling the rotation of the transmission gear 200 to be transmitted to, the one-way gear 300 can only drive the hub shell 400 to rotate in one direction, in order to achieve the above functions, the pawl 310 is arranged on the one-way gear 300, the ratchet 410 matched with the pawl 310 is arranged in the hub shell 400, the pawl 310 and the ratchet 410 form a structure similar to a ratchet mechanism, so that the one-way gear 300 can drive the hub shell 400 to rotate, when the one-way gear 300 rotates reversely, namely when the central shaft 100 rotates reversely or when a pedal of a bicycle pedals reversely pedals, the one-way gear 300 cannot drive the hub shell 400 to rotate reversely, because the ratchet 410 arranged in the hub shell 400 can block the pawl 310 on the one-way gear 300, the front wheel of the bicycle cannot rotate. Therefore the utility model discloses the structure is comparatively simple under the condition that can realize the forerunner chainless mechanism of bicycle, and the space that occupies is less, is convenient for maintain the maintenance.

The parallel gear 500 is specifically composed of a first tooth portion 510 and a second tooth portion 520, the first tooth portion 510 and the second tooth portion 520 are both erected on a frame of a bicycle and are concentric with a center shaft, the second tooth portion 520 is located on one side of the first tooth portion 510, the first tooth portion 510 is meshed with the transmission gear 200, the second tooth portion 520 is meshed with the one-way gear 300, so that the transmission gear 200 can drive the one-way gear 300 to rotate after rotating, and meanwhile, the transmission ratio of the second tooth portion 520 to the one-way gear 300 is set to be 1 to 2.

The utility model discloses in, one-way gear 300 comprises gear portion and installation department, the installation department is located one side of gear portion and both are in the same axis, pawl 310 has a plurality ofly, a plurality of pawls 310 distribute and set up on the annular surface of installation department, corresponding ratchet 410 sets up in the inner chamber of hub shell 400, hub shell 400 is including the installation department suit of one-way gear 300, ratchet 410 cooperates with pawl 310, thereby realize that one-way gear 300 can only drive hub shell 400 unidirectional rotation's function, for making pawl 310 better with ratchet 410's cooperation effect, pawl 310 that sets up on one-way gear 300's installation department has a plurality ofly, a plurality of pawls 310 set up around the annular surface circumference interval of installation department, even there is a pawl 310 to break down and also can not influence one-way gear 300 only can the function of one-way drive hub shell 400 under the condition of a plurality of pawls 310.

Since the transmission gear 200 cannot rotate relative to the central shaft 100, in order to achieve the above functions, a positioning key 210 is arranged between the transmission gear 200 and the central shaft 100, the positioning key 210 can play a role of fixing the transmission gear 200 to rotate together with the central shaft 100, of course, a snap spring 320 is arranged between the one-way gear 300 and the central shaft 100, the snap spring 320 can play a role of positioning the one-way gear 300, specifically, in order to prevent the one-way gear 300 from axially shifting on the central shaft 100 along the central shaft 100, in order to make the hub shell 400 rotate smoothly relative to the central shaft 100, lubricating oil is additionally arranged in the hub shell 400, therefore, an oil seal 420 is arranged at the edge of the inner cavity of the hub shell 400, the oil seal 420 can prevent the lubricating oil from leaking, meanwhile, a first bearing 430 is arranged between the hub shell 400 and the central shaft 100, and second bearings 110 are further arranged at, the second bearing 110 is engaged with a frame of the bicycle to smoothly rotate the center shaft 100.

Because one-way gear 300 and flower-drum shell 400 can rotate around center pin 100 to drive gear 200 is fixed on center pin 100 through the key, consequently in order to avoid the center pin 100 to be worn and damaged after long-term the use, the cover is equipped with a sleeve pipe 120 on center pin 100, and one-way gear 300, flower-drum shell 400 and drive gear 200 all are the cover on sleeve pipe 120, and sleeve pipe 120 is connected with center pin 100 is detachable, works as the utility model discloses even the sleeve pipe 120 also can be changed sleeve pipe 120 and needn't change center pin 100 by wearing and tearing after long-term the use, thereby make the utility model discloses a durability increases widely to maintenance cost has been reduced widely.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention.

Claims

1. A front-drive chainless mechanism of a bicycle is characterized by comprising

A central shaft (100);

a transmission gear (200) which is fitted around the central shaft (100) and is not rotatable with respect to the central shaft (100);

the one-way gear (300) is sleeved on the central shaft (100) and can rotate relative to the central shaft (100), and a pawl (310) is further arranged on the one-way gear (300);

the hub shell (400) is sleeved on the central shaft (100), and the hub shell (400) is provided with ratchet teeth (410) matched with the pawls (310) so that the hub shell (400) can rotate around the central shaft (100) in a single direction; and

a parallel gear (500) fixed to a bicycle frame to transmit rotation of the driving gear (200) to the one-way gear (300).

2. The bicycle front wheel chainless mechanism of claim 1, wherein the parallel gear (500) comprises a first tooth portion (510) and a second tooth portion (520) located at one side of the first tooth portion (510) and concentric with the first tooth portion (510), the first tooth portion (510) is engaged with the transmission gear (200), and the second tooth portion (520) is engaged with the one-way gear (300).

3. The bicycle front wheel chainless mechanism of claim 1, wherein the one-way gear (300) comprises a gear portion and a mounting portion, the mounting portion is disposed on one side of the gear portion and is concentric with the gear portion, the pawl (310) is disposed on a ring surface of the mounting portion, the hub shell (400) is nested with the mounting portion and the ratchet (410) is disposed in an inner cavity of the hub shell (400).

4. The bicycle forward drive chainless mechanism of claim 3, wherein the plurality of pawls (310) is provided, the plurality of pawls (310) being spaced around an annular surface of the mounting portion.

5. The bicycle forward drive chainless mechanism of claim 1, wherein a positioning key (210) is provided between the drive gear (200) and the central shaft (100) to disable rotation of the drive gear (200) relative to the central shaft (100).

6. The bicycle front wheel chainless mechanism of claim 1, wherein an internal snap spring (320) is provided between the one-way gear (300) and the central shaft (100) to position the one-way gear (300).

7. The bicycle front drive chainless mechanism of claim 1, wherein an edge of an inner cavity of the hub shell (400) is provided with an oil seal (420).

8. The bicycle front wheel chainless mechanism of claim 1, wherein a first bearing (430) is provided between the hub shell (400) and the central shaft (100).

9. The bicycle front wheel chainless mechanism according to claim 1, wherein a second bearing (110) is provided on the center axle (100) on both sides of the hub shell (400).

10. The bicycle front drive chainless mechanism of claim 2, wherein a sleeve (120) is sleeved on the central shaft (100), and the hub shell (400), the transmission gear (200) and the one-way gear (300) are sleeved on the sleeve (120).