CN216922935U

CN216922935U - Ratchet wheel clutch mechanism of rear flywheel of bicycle

Info

Publication number: CN216922935U
Application number: CN202220239632.3U
Authority: CN
Inventors: 张皓嘉
Original assignee: Foshan Shunde Space Cardan Material Co ltd
Current assignee: Foshan Shunde Space Cardan Material Co ltd
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2022-07-08
Anticipated expiration: 2032-01-28

Abstract

A ratchet clutch mechanism of a rear flywheel of a bicycle comprises an inner sleeve sleeved on the outer side of an axle of the bicycle, wherein one end of the inner sleeve is sleeved with a rotatable outer sleeve, one end of the inner sleeve penetrates through the outer sleeve and is connected with a top cover to limit the outer sleeve, one end, facing the outer side, of a spring plate is arranged on the inner side of a ratchet and keeps the ratchet in an outward protruding state, circumferential inner oblique teeth are arranged on the inner side of the outer sleeve corresponding to the ratchet, and the ratchet is matched with the inner oblique teeth to enable the outer sleeve to rotate towards one direction relative to the inner sleeve; the inner helical teeth are arranged on the inner side of the inner ratchet ring, the inner ratchet ring is connected with the outer sleeve through threads, and when the inner helical teeth are damaged, the whole flywheel does not need to be replaced, and only the inner ratchet ring is replaced.

Description

Ratchet wheel clutch mechanism of rear flywheel of bicycle

Technical Field

The utility model relates to the technical field of bicycles, in particular to a ratchet wheel clutch mechanism of a rear flywheel of a bicycle.

Background

The gear on the hub of the rear wheel of the traditional shaft-driven bicycle does not have a ratchet clutch device, and the rear wheel drives a transmission shaft to simultaneously pedal the shaft center and then rotate under the condition when rotating, so that accidents are easy to occur. In addition, in the existing flywheel structure for chain transmission, the ratchets are arranged in the flywheel, so that when the flywheel rotates forwards, the flywheel and an axle rotate synchronously, and when the flywheel rotates reversely, the flywheel slips relative to the axle.

SUMMERY OF THE UTILITY MODEL

The utility model improves the prior art aiming at the defects, and provides a ratchet wheel clutch mechanism of a rear flywheel of a bicycle, which has the following technical scheme:

the utility model provides a ratchet clutching mechanism of flywheel behind bicycle, is including one set of endotheca of locating the bicycle axletree outside, and this endotheca pot head is equipped with rotatable overcoat, the one end of endotheca runs through the overcoat and makes the overcoat spacing through being connected with a top cap, at least two sets of first mounting grooves have been seted up to endotheca circumference, and lie in one side subtend of first mounting groove has seted up the second mounting groove, the built-in ratchet that is equipped with of first mounting groove, the shell fragment has been installed to the second mounting groove, this shell fragment towards outside one end set up in the inboard of ratchet, and make the ratchet keeps outside bellied state, the inboard of overcoat corresponds the ratchet and is provided with the interior skewed tooth of circumference, and this ratchet makes with interior skewed tooth cooperation the overcoat is for endotheca direction rotation.

The inner side of the outer sleeve is connected with an inner ratchet ring through threads, and the inner side of the inner ratchet ring is provided with circumferential inner oblique teeth.

The interior cover is the echelonment structure, and it is spacing through first mounting groove and connects the ratchet, and through the spacing connection shell fragment of second mounting groove, this first mounting groove extends towards the one end of top cap with the second mounting groove.

Furthermore, the first mounting groove and the second mounting groove are both arc concave surfaces, the ratchet and the bottom of the elastic sheet are provided with arc convex surfaces matched with the arc concave surfaces, and when the arc convex surfaces are matched with the arc concave surfaces, the ratchet and the elastic sheet are both outwards protruded.

Furthermore, the elastic sheet is in a 6-shaped structure, and an opening is formed in the middle of the elastic sheet and a supporting part is arranged in the middle of the elastic sheet in an extending mode.

And a circle of rolling balls are arranged between the outer sleeve and the inner sleeve.

Furthermore, a circle of balls is arranged between the outer sleeve and the top cover.

The inner sleeve has internal threads for threaded engagement with a bicycle axle.

Compared with the prior art, the utility model has the beneficial effects that: the flywheel can be replaced and maintained conveniently under the condition that the ratchet or the elastic sheet is damaged without replacing the whole flywheel, and the ratchet and the elastic sheet matched with the ratchet are of an independent component connecting structure, so that the diameter of the circumferential inner helical teeth is smaller, the friction force between the ratchet and the inner helical teeth is reduced, and the transmission force is increased; the inner helical teeth are arranged on the inner side of the inner ratchet ring rim, the inner ratchet ring rim is connected with the outer sleeve through threads, and when the inner helical teeth are damaged, the whole flywheel does not need to be replaced, and only the inner ratchet ring rim needs to be replaced; the outer sleeve is matched with the inner sleeve through a circle of balls, and then the outer sleeve is matched with the top cover through another circle of balls, so that the outer sleeve rolls very smoothly.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced as follows:

FIG. 1 is a perspective view of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a view showing the structure of the ratchet and the inner helical teeth of the present invention;

FIG. 4 is a view of the interior of the jacket of the present invention;

the method comprises the following steps: 1. an inner sleeve; 2. a jacket; 3. a top cover; 4. a first mounting groove; 5. a second mounting groove; 6. a ratchet; 7. a spring plate; 8. inner helical teeth; 9. an inner ratchet ring; 10. a circular arc concave surface; 11. a circular arc convex surface; 12. a support portion; 13. and a ball.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

Embodiments of the utility model will be described in further detail below with reference to the following drawings, in which:

the utility model provides a ratchet clutching mechanism of flywheel behind bicycle, including one set of endotheca 1 of locating the bicycle axletree outside, 1 pot head of this endotheca is equipped with rotatable overcoat 2, the one end of endotheca 1 runs through overcoat 2 and makes overcoat 2 spacing through being connected with a

top cap

3, 1 circumference of endotheca has seted up two sets of first mounting grooves 4, and lie in one side subtend of first mounting groove 4 and seted up second mounting groove 5, the built-in ratchet 6 that is equipped with of first mounting groove 4, shell fragment 7 has been installed to second mounting groove 5, the one end of this shell fragment 7 towards the outside sets up in 6 inboards of ratchet, and make 6 keep outside bellied state of ratchet, the inboard of overcoat 2 corresponds ratchet 6 and is provided with the interior skewed tooth 8 of circumference, this ratchet 6 makes overcoat 2 rotate towards a direction for endotheca 1 with interior skewed tooth 8 cooperation.

Specifically, when the outer sleeve 2 rotates in the forward direction relative to the inner sleeve 1, the raised ratchet teeth 6 abut against the inner helical teeth 8 of the inner sleeve 1, so that the inner sleeve 1 and the outer sleeve 2 rotate synchronously, and when the outer sleeve 2 rotates in the reverse direction relative to the inner sleeve 1, the raised ratchet teeth 6 are leveled by the inner helical teeth, and the outer sleeve 2 rotates in a slipping manner relative to the inner sleeve 1.

The inner side of the outer sleeve 2 is connected with an inner ratchet ring 9 through threads, the inner side of the inner ratchet ring 9 is provided with circumferential inner helical teeth 8, and through the inner ratchet ring 9, when the inner helical teeth 8 are damaged, the whole flywheel does not need to be replaced, and only the inner ratchet ring 9 needs to be replaced.

The inner sleeve 1 is of a stepped structure, is connected with the ratchet 6 in a limiting way through a first mounting groove 4, is connected with the elastic sheet 7 in a limiting way through a second mounting groove 5, the first mounting groove 4 and the second mounting groove 5 extend towards one end of the top cover 3, the elastic sheet 7 is of a 6-shaped structure, an opening is formed in the middle of the elastic sheet, a supporting part 12 is arranged in an extending way, and the ratchet 6 and the elastic sheet 7 can be conveniently replaced and installed.

Further, first mounting groove 4 and second mounting groove 5 are circular arc concave 10, and ratchet 6 and shell fragment 7 bottom have with circular arc concave 10 complex circular arc convex surface 11, and when circular arc convex surface 11 and circular arc concave 10 cooperated, ratchet 6 and shell fragment 7 all outwards protruding.

A circle of balls 13 is arranged between the outer sleeve 2 and the inner sleeve 1, when the inner sleeve 1 penetrates through the outer sleeve 2, the circumferential surface of the inner sleeve 1 and the step of the outer sleeve 2 form a containing cavity for containing the balls 13, the inner sleeve 1 and the outer sleeve 2 both adopt arc-shaped surfaces corresponding to the containing cavity, the outer circumferential surface of the inner sleeve 1 is abutted against the balls 13, so that the outer sleeve 2 can smoothly rotate relative to the inner sleeve 1, a circle of balls 13 is arranged between the outer sleeve 2 and the top cover 3, and after the outer sleeve 2 is matched with the top cover 3, a containing cavity for containing the balls 13 is formed between the outer sleeve 2 and the top cover 3, so that the outer sleeve 2 can smoothly rotate relative to the top cover 3.

The inner sleeve 1 has an internal thread for threaded engagement with a bicycle axle.

The flywheel can be replaced and maintained conveniently under the condition that the ratchet 6 or the elastic sheet 7 is damaged without replacing the whole flywheel, and the ratchet 6 and the elastic sheet 7 matched with the ratchet 6 are of an independent component connecting structure, so that the diameter of the circumferential inner helical teeth 8 can be smaller, the friction force between the ratchet 6 and the inner helical teeth 8 is reduced, and the transmission force is increased; the inner helical teeth 8 are arranged on the inner side of the inner ratchet ring 9, the inner ratchet ring 9 is connected with the outer sleeve 2 through threads, and when the inner helical teeth 8 are damaged, the whole flywheel does not need to be replaced, and only the inner ratchet ring 9 needs to be replaced; the outer sleeve 2 is matched with the inner sleeve 1 through a circle of balls 13, and the outer sleeve 2 is matched with the top cover 3 through another circle of balls 13, so that the outer sleeve 2 rolls very smoothly.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A ratchet wheel clutch mechanism of a rear flywheel of a bicycle comprises an inner sleeve (1) arranged on the outer side of a bicycle axle, wherein one end of the inner sleeve (1) is sleeved with a rotatable outer sleeve (2), the ratchet wheel clutch mechanism is characterized in that one end of the inner sleeve (1) penetrates through the outer sleeve (2) and is connected with a top cover (3) to enable the outer sleeve (2) to be limited, at least two groups of first mounting grooves (4) are circumferentially formed in the inner sleeve (1), a second mounting groove (5) is oppositely formed in one side of each first mounting groove (4), ratchets (6) are installed in the first mounting grooves (4), elastic sheets (7) are installed in the second mounting grooves (5), one ends, facing outwards, of the elastic sheets (7) are arranged on the inner sides of the ratchets (6) to enable the ratchets (6) to keep an outwards convex state, circumferential inner oblique teeth (8) are arranged on the inner side of the outer sleeve (2) corresponding to the ratchets (6), the ratchets (6) are matched with the inner helical teeth (8) to enable the outer sleeve (2) to rotate in one direction relative to the inner sleeve (1).

2. A ratchet clutch mechanism for a rear bicycle freewheel according to claim 1 characterized in that the inner side of the outer sleeve (2) is threadedly connected with an inner ratchet ring (9), the inner side of the inner ratchet ring (9) being provided with circumferential inner helical teeth (8).

3. The ratchet clutch mechanism for the rear flywheel of bicycle according to claim 1, wherein the inner sleeve (1) is of a step-like structure, and is connected with the ratchet teeth (6) in a limited manner through a first mounting groove (4), and is connected with the elastic sheet (7) in a limited manner through a second mounting groove (5), and the first mounting groove (4) and the second mounting groove (5) extend towards one end of the top cover (3).

4. The ratchet clutch mechanism of the rear flywheel of the bicycle as claimed in claim 3, wherein the first mounting groove (4) and the second mounting groove (5) are both arc concave surfaces (10), the bottoms of the ratchet (6) and the spring plate (7) are provided with arc convex surfaces (11) matched with the arc concave surfaces (10), and when the arc convex surfaces (11) are matched with the arc concave surfaces (10), the ratchet (6) and the spring plate (7) are both convex outwards.

5. The ratchet clutch mechanism of the rear flywheel of the bicycle as claimed in claim 1 or 3, wherein the spring plate (7) is in a 6-shaped structure, and an opening is formed in the middle of the spring plate and a support part (12) is arranged in the middle of the spring plate in an extending manner.

6. A ratchet clutch mechanism for a rear bicycle freewheel according to claim 1 characterized in that a ring of balls (13) is arranged between the outer sleeve (2) and the inner sleeve (1).

7. A ratchet clutch mechanism for a rear bicycle freewheel according to claim 1 or 6 characterized in that a ring of balls (13) is provided between the cover (2) and the top cover (3).

8. The ratchet clutch mechanism for a rear bicycle freewheel according to claim 1 characterized in that, the inner sleeve (1) has an internal thread for threaded engagement with the bicycle axle.