CN219947771U

CN219947771U - End tooth transmission structure hub

Info

Publication number: CN219947771U
Application number: CN202320993256.1U
Authority: CN
Inventors: 樊绪平
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-04-27
Filing date: 2023-04-27
Publication date: 2023-11-03
Anticipated expiration: 2033-04-27

Abstract

The utility model provides a hub with an end tooth transmission structure, relates to the technical field of bicycle accessories, and solves the technical problems that assembly and later maintenance are difficult due to difficulty in assembly and disassembly in the prior art. The end tooth transmission structure flower drum comprises a flower drum main body, a lower tooth part arranged on the flower drum main body, a ratchet main body and an upper tooth part arranged on the ratchet main body, wherein the ratchet main body is arranged on the flower drum main body, the lower tooth part and the upper tooth part can be meshed with each other, at least two centrally symmetrical inserting holes are formed in the outer sides of helical teeth of the lower tooth part, and the inserting holes are used for extending into a disassembly tool for applying force. The lower tooth part adopted by the utility model is provided with the inserting hole, and the existing dismounting tool with two clamping joints can be adopted for dismounting, so that the assembly and the later maintenance are simpler.

Description

End tooth transmission structure hub

Technical Field

The utility model relates to the technical field of bicycle accessories, in particular to a hub with an end tooth transmission structure.

Background

The hub is a transmission component commonly used for a bicycle, the hub with an end face tooth structure is one of the bicycle hubs, the hub with the existing end face tooth is, for example, application number 201820585583.2, and a patent document named as a multi-tooth double-clutch hub discloses an end face tooth hub composed of a ratchet main body, upper teeth, lower teeth and other components, but the application point of the lower tooth structure in installation is an internal spline, a special tool is needed, and a professional technician is needed to disassemble and assemble, so that the assembly and the later maintenance are not facilitated.

And the end face teeth on the market are mainly 18 teeth or 36 teeth and the like, the end face teeth are divided into 20-degree equal parts and 10-degree equal parts respectively, the force is delayed due to large dividing angle, the instantaneous force loss exists, and the potential safety hazard problem exists when climbing or turning back the foot to force is slower.

Disclosure of Invention

The utility model aims to provide an end tooth driving structure hub, which solves the technical problems that the assembly and the later maintenance are difficult due to difficult assembly and disassembly in the prior art. The preferred technical solutions of the technical solutions provided by the present utility model can produce a plurality of technical effects described below.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides an end tooth transmission structure flower drum which comprises a flower drum main body, a lower tooth part, a ratchet main body and an upper tooth part, wherein the lower tooth part is arranged on the flower drum main body, the ratchet main body is arranged on the ratchet main body, the lower tooth part and the upper tooth part can be meshed with each other, at least two centrally symmetrical inserting holes are formed in the outer sides of inclined teeth of the lower tooth part, and the inserting holes are used for extending into a disassembly tool to apply force.

Preferably, the lower teeth and the upper teeth are distributed in a circular ring shape, the length direction of the tooth tops of the inclined teeth faces to the circle center of the circular ring shape, and the number of the inclined teeth is 75.

Preferably, both tooth surfaces of the helical tooth are inclined tooth surfaces, and the inclination directions of both tooth surfaces are the same.

Preferably, one tooth surface of the helical tooth is an inclined tooth surface, and the other tooth surface is a tooth surface perpendicular to the end surface.

Preferably, the lower tooth part is in a circular ring shape, an external thread is arranged on an outer ring surface of the lower tooth part, an internal thread matched with the external thread is arranged on an inner wall surface of one end of the flower-drum main body, the inclined tooth is close to an inner ring of the lower tooth part, and the inserting hole is arranged between the inclined tooth and the outer ring surface.

Preferably, the number of the plug holes is a plurality of the plug holes and the plug holes are uniformly distributed along the circumferential direction of the helical teeth.

Preferably, the upper tooth part comprises a tooth ring body and a connecting body, wherein the inclined tooth is arranged on one end face of the tooth ring body, the connecting body is arranged on the other end face of the tooth ring body, the connecting body is a cylindrical body, the connecting body and the tooth ring body are coaxially arranged, a spline perpendicular to the connecting body is arranged on the outer wall of the cylindrical body, and a key slot matched with the spline is arranged on the inner wall of one end of the ratchet body.

Preferably, the inner ring of the toothed ring body protrudes out of the inner wall of the connecting body to form a tight abutting body, and the tight abutting body is used for abutting the spring in the ratchet main body.

Preferably, the number of the splines ranges from 20 to 30.

The utility model adopts the technical proposal and has at least the following beneficial effects:

according to the utility model, the hub main body is connected with the ratchet main body, and is in meshed transmission through the upper tooth part and the lower tooth part, at least two centrally symmetrical inserting holes are formed in the outer side of the inclined tooth of the lower tooth part, and the inserting holes can be used for inserting assembling and disassembling tools with two clamping joints, so that the assembling and disassembling tools are convenient to assemble and disassemble, and the tools can be the existing angle grinder wrench, no special tools are needed, and the assembling and disassembling tools are convenient for subsequent users to maintain.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a partial sectional front view of a hub with an end tooth transmission structure according to an embodiment of the present utility model;

fig. 2 is a schematic diagram of an exploded structure of a hub part of an end tooth transmission structure provided by an embodiment of the utility model;

fig. 3 is a schematic diagram of a partial cross-sectional structure of a hub of an end tooth transmission structure according to an embodiment of the present utility model.

In the figure 1, a hub main body; 2. a lower tooth portion; 3. a ratchet body; 4. an upper tooth portion; 5. helical teeth; 6. a plug hole; 7. a tooth ring body; 8. a connecting body; 9. a spline; 10. a tightening body; 11. and (3) a spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, based on the examples herein, which are within the scope of the utility model as defined by the claims, will be within the scope of the utility model as defined by the claims.

The specific embodiment of the utility model provides an end tooth transmission structure hub, which is combined with figures 1-3, and mainly comprises a hub main body 1, a lower tooth part 2, a ratchet main body 3 and an upper tooth part 4, wherein the hub main body 1 and the ratchet main body 3 are connected, the lower tooth part 2 is arranged at one end of the hub main body 1 facing the ratchet main body 3, the upper tooth part 4 is arranged at one end of the ratchet main body 3, the opposite end surfaces of the upper tooth part 4 and the lower tooth part 2 are respectively provided with an inclined tooth and can be meshed with each other, the inclined teeth on the lower tooth part 2 and the upper tooth part 4 are respectively distributed in a circular shape, so that the lower tooth part 2 and the upper tooth part 4 can transmit rotating force. The existing tool can be adopted to disassemble and assemble the tool, so that the user can conveniently disassemble and assemble the tool during subsequent maintenance.

Referring to fig. 2 to fig. 3, the helical teeth 5 on the lower tooth portion 2 and the upper tooth portion 4 are all distributed in a ring shape, so that the length direction of the tooth tops of the helical teeth 5 faces the circle center of the ring shape, the width of the helical teeth 5 is gradually narrowed from the direction away from the circle center to the line of defense near the circle center, in the specific embodiment of the utility model, the number of the helical teeth 5 can be 75, the included angle between the connecting lines of the tooth tops of two adjacent helical teeth 5 to the circle center is 4.8 degrees, and the dividing angle of the end teeth is equal to 4.8 degrees, so that the stepping efficiency is improved, and the moment of non-inductive direct output is approximate. Can be started instantly when climbing or turning back feet to exert force, and reduces the potential safety hazard.

In one embodiment, the two tooth surfaces of the helical tooth 5 may be inclined tooth surfaces, and the inclined directions of the two tooth surfaces are the same, and the inclined tooth surfaces are different from the included angles of the end surfaces of the lower tooth part 2 and the upper tooth part 4, and the inclined directions of the corresponding inclined tooth surfaces of the lower tooth part 2 and the upper tooth part 4 are opposite, so that the upper tooth part 4 can be meshed with the lower tooth part 2 in one rotation direction, and further, the force transmission in one direction is achieved, the meshing can not be generated in the other rotation direction, and the force transmission in the other direction is not performed.

In another embodiment, one tooth surface of the helical tooth 5 is an inclined tooth surface, the other tooth surface can be a tooth surface perpendicular to the end surface, and the inclined tooth surfaces on the upper tooth part 2 and the lower tooth part 4 are opposite in inclination direction, so that the inclined tooth surfaces on the lower tooth part 2 and the upper tooth part 4 are contacted, the perpendicular tooth surfaces can be contacted, the perpendicular tooth surfaces on the upper tooth part 4 can be meshed with each other to achieve the effect of transmitting power when rotating in one direction, and the force transmission can be avoided through the effect of the two inclined tooth surfaces when the upper tooth part 4 rotates in the other direction, so that the force cannot be reversely transmitted.

Referring to fig. 1 and fig. 2, the lower tooth 2 is annular, an external thread is disposed on an outer ring surface of the lower tooth 2 for connection, an internal thread matched with the external thread is disposed on an inner wall surface of one end of the hub main body 1 facing the ratchet main body 3, the hub main body 1 and the lower tooth 2 are connected through threads, the helical teeth 5 are disposed near an inner ring of the lower tooth 2, the inserting holes 6 are disposed between the helical teeth 5 and the outer ring surface, the number of the inserting holes 6 can be multiple, and the inserting holes 6 are uniformly distributed along a circumferential direction of the helical teeth 5, in the utility model, the number of the inserting holes 6 is 6, and the inserting holes 6 can be cylindrical holes or waist-shaped holes.

In a specific example of the present utility model, the upper tooth portion 4 includes a tooth ring body 7 and a connecting body 8, referring to fig. 2, an end face (an end face facing the upper tooth portion 4) of the tooth ring body 7 is provided with helical teeth 5, another end face (an end face far away from the upper tooth portion 4) of the tooth ring body 7 is provided with the connecting body 8, the connecting body 8 and the tooth ring body 7 are coaxially provided, a spline 9 perpendicular to the connecting body 8 is provided on an outer wall of the cylindrical body, an inner wall of one end of the ratchet body 3 facing the hub body 1 is provided with keyways adapted to the splines 9, the number of the splines 9 ranges from 20 to 30, specifically may be 26, and the number of the keyways is 26.

The inner ring of the tooth ring body 7 protrudes out of the inner wall of the connecting body 8 to form a propping body 10, the propping body 10 is also an annular body, the propping body 10 is used for propping a spring 11 in the ratchet main body 3, and in actual installation, the spring 11 pushes the upper tooth part 4 to prop against the lower tooth part 2 by propping the propping body 10.

In the present disclosure, the terms "one embodiment," "some embodiments," "examples," "specific examples," "some examples," and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. The utility model provides an end tooth transmission structure flower-drum, its characterized in that, is in including flower-drum main part, setting lower tooth portion, ratchet main part and the setting of setting in the flower-drum main part are in the last tooth portion in the ratchet main part, the ratchet main part sets up in the flower-drum main part, just lower tooth portion with can intermesh in the tooth portion, the outside of the skewed tooth of lower tooth portion sets up two at least centrosymmetric spliced eye, the spliced eye is used for stretching into assembly and disassembly tools application of force.

2. The end tooth transmission structure hub according to claim 1, wherein the helical teeth on the lower tooth portion and the upper tooth portion are distributed in a circular ring shape, the length direction of the tooth tops of the helical teeth faces the circle center of the circular ring shape, and the number of the helical teeth is 75.

3. The end tooth transmission structure hub according to claim 1, wherein both tooth surfaces of said helical tooth are inclined tooth surfaces, and the inclination directions of both said tooth surfaces are the same.

4. The end tooth transmission structure hub according to claim 1, wherein one tooth surface of said helical tooth is an inclined tooth surface and the other tooth surface is a tooth surface perpendicular to the end surface.

5. The end tooth transmission structure hub according to claim 1, wherein the lower tooth portion is in a circular ring shape, an external thread is arranged on an outer ring surface of the lower tooth portion, an internal thread matched with the external thread is arranged on an inner wall surface of one end of the hub main body, the helical tooth is arranged close to an inner ring of the lower tooth portion, and the inserting hole is arranged between the helical tooth and the outer ring surface.

6. The end tooth transmission structure hub according to claim 5, wherein the number of the insertion holes is plural and uniformly distributed along the circumferential direction of the helical tooth.

7. The end tooth transmission structure hub according to claim 1, wherein the upper tooth portion comprises a tooth ring body and a connecting body, the inclined tooth is arranged on one end face of the tooth ring body, the connecting body is arranged on the other end face of the tooth ring body, the connecting body is a cylindrical body, the connecting body and the tooth ring body are coaxially arranged, a spline perpendicular to the connecting body is arranged on the outer wall of the cylindrical body, and a key slot matched with the spline is arranged on the inner wall of one end of the ratchet body.

8. The end tooth transmission structure hub according to claim 7, wherein the inner ring of the tooth ring body protrudes out of the inner wall of the connecting body to form a tight abutting body, and the tight abutting body is used for tightly abutting a spring in the ratchet main body.

9. The end tooth transmission structure hub as claimed in claim 7, wherein the number of said splines is in the range of 20-30.