TWI635971B - Ratchet ring structure connected to a hub assembly - Google Patents

Abstract

The invention relates to a ratchet ring structure combined with a flower hub component, which is suitable for a flower hub component. The flower hub component has a virtual rotating shaft. The flower hub component recesses a group of connecting spaces along the virtual rotating shaft. The ring wall mask has an engaging tooth portion, wherein the ratchet ring structure combined with the flower hub assembly includes: a ratchet ring body rotatably assembled in the assembly space along the virtual rotation axis, and has a mutual relationship with the engaging tooth portion The engaged first tooth portion and a second tooth portion opposite to the first tooth portion; in order to avoid excessive radial force generated on the hub assembly when torque is applied, and has the effect of reducing costs.

Description

Ratchet ring structure combined with flower hub assembly

The invention relates to a ratchet ring structure, in particular to a ratchet ring structure combined with a hub component.

The ethnic group riding a bicycle is quite wide. No matter whether children, elderly people or young people have a bicycle, especially many students, most of them use bicycles as a means of travel. In addition to the popularity of sports and leisure and environmental awareness Head-up bicycles are gradually replacing household steam and motorcycles, and with the increasing number of users of bicycles, users' requirements for bicycles have not only limited to their mobility functions, but the improvement and improvement of various bicycle components has also led to the development of the bicycle industry. More sophisticated.

The hub of a bicycle is the shaft at the center of the wheel. During the cycling, it is pressed by the weight of the rider and must be turned at the same time. It can be said that it is a component that has multiple functions. The structure of the ratchet wheel assembly in the flower hub is to provide unidirectional work drive. Its main components include a ratchet ring, ratchet teeth, pawl, and elastic parts. As shown in FIG. 1, the ratchet ring 2 is mostly It is fixed inside the flower hub base 1. A plurality of ratchet teeth are provided on the inner ring of the ratchet ring 2. A plurality of threads are provided on the outer ring of the ratchet ring 1. A vibration caused by a bicycle traveling on a variable terrain, such as a rugged road, will form a radial force to act on the ratchet ring 2. So in order to prevent the ratchet ring 2 from being stripped under high torque, the hub hub 1 must be thick and the threads must be non- Often rough, but the above-mentioned threads of the ratchet ring 2 and the hub hub 1 will collide with each other when they are actuated, which is prone to wear and noise, and the hub hub 1 is usually made of aluminum. The thread inside the hub is getting thinner and thinner, so that the thread of the ratchet ring 2 cannot smoothly rotate outwards and fail to mesh with the interior of the hub 1, which results in tooth loss, which affects the efficiency of power transmission. However, if the thickness of the hub base 1 is reduced to reduce the weight, the hub base 1 may be insufficiently rigid, and cannot withstand external forces such as radial forces, causing the hub base 1 to be damaged, affecting the safety and smoothness of the bicycle. On the other hand, the pressure generated by the thread causes the flower hub seat 1 to expand and expand during operation, which is prone to break or bend and deform. It will also cause the rotation of the thread to be sluggish and cause seizure. Disassembling each complete set of hubs is not only time consuming and laborious, it also wastes a lot of manufacturing costs.

Therefore, it is necessary to provide a novel and progressive ratchet ring structure with a hub assembly to solve the above problems.

In view of the shortcomings of the above-mentioned conventional technology, the present invention provides a ratchet ring structure combined with a hub assembly, which mainly provides the purpose of improving the reinforced structure, reducing the degree of wear, and extending the service life.

Another object of the present invention is to provide a ratchet ring structure combined with a hub assembly. The ratchet ring structure does not generate an axial force mainly like a conventional thread, and does not generate the same radial force under a given torque. .

Another object of the present invention is to provide a ratchet ring structure combined with a hub assembly, which mainly reduces the cost.

Therefore, the present invention relates to a ratchet ring structure combined with a flower hub assembly, which is suitable for a flower hub assembly. The flower hub assembly has a virtual shaft. The flower hub assembly recesses a set of connecting spaces along the virtual shaft. The ring wall mask of space has an engaging tooth portion, wherein the ratchet ring structure combined with the matching flower hub assembly includes: a ratchet ring body.

The ratchet ring body is rotatably assembled in the assembly space along the virtual rotation axis, and has a first tooth portion engaged with the engaging tooth portion and a second tooth portion opposite to the first tooth portion. , When the second tooth portion is convexly provided with a plurality of ratchet teeth, the first tooth portion is convexly provided with a plurality of spline teeth, or when the first tooth portion is convexly provided with a plurality of ratchet teeth, the second tooth portion A plurality of spline teeth are convexly arranged, and a ratchet groove corresponding to each spline tooth is formed between each of the ratchet teeth.

In the ratchet-loop knot structure combined with the spline hub assembly of the present invention, the aforementioned engaging tooth portion is sequentially provided with a plurality of engaging teeth engaged with the spline teeth, and the thickness of the spline teeth is less than or equal to the engagement Tooth thickness is half.

In the ratchet-loop knot structure combined with the spline hub assembly of the present invention, the spline teeth have two opposite inclined surfaces that gradually widen toward the ratchet teeth. A bevel angle is formed therebetween, and the bevel angle is between 1 degree and 20 degrees.

In the ratchet ring knot structure combined with the flower hub assembly of the present invention, the flower hub assembly is a transmission seat.

Contrast the effect of the prior art: The present invention provides a ratchet ring structure combined with a flower hub assembly, which has the following effects. First, the outer ring surface of the ratchet ring body is modified into spline teeth to mesh with the hub assembly, and the weak points between the ratchet teeth on the inner ring surface of the ratchet ring body are compensated by the spline teeth. Not only the strength of the meshing structure is better, but the meshing force is more uniform, so it can reduce the occurrence of tooth loss, and achieve the purpose of improving the strengthening structure and reducing the degree of wear. Second, when the ratchet ring body is activated At this time, because the angle of the bevel is smaller than the angle of the conventional technology thread, it will not produce the same radial force under a given torque. The ratchet teeth of the ratchet ring body can effectively reduce the ratchet teeth from being hit with ratchet teeth effectively. Therefore, it can reduce the generation of abrasion to extend the service life, and at the same time can effectively reduce the generation of noise.

<Learning>

1‧‧‧ flower hub

2‧‧‧ ratchet ring

<this invention>

10‧‧‧ flower hub assembly

11‧‧‧Virtual shaft

12‧‧‧Assembly space

13‧‧‧ Engagement teeth

131‧‧‧ engagement teeth

14‧‧‧ bevel angle

20‧‧‧ Ratchet ring body

21‧‧‧first tooth

22‧‧‧Second tooth

23‧‧‧ spline teeth

231‧‧‧ bevel

24‧‧‧ Ratchet

25‧‧‧ ratchet groove

30‧‧‧ Ratchet Assembly

31‧‧‧Ratchet

32‧‧‧ Pawl

33‧‧‧Elastic element

FIG. 1 is an exploded view of a conventional three-dimensional structure.

FIG. 2 is a perspective view of a first embodiment of a ratchet structure combined with a flower hub assembly according to the present invention.

FIG. 3 is a schematic diagram of FIG. 2, illustrating that the present invention cooperates with a flower hub assembly.

FIG. 4 is a partial enlarged view of FIG. 2, illustrating that a virtual rotating shaft and a spline tooth extension form a bevel angle.

FIG. 5 is a schematic diagram of FIG. 2, illustrating a state in which a side surface of the inner ring of the present invention is matched with a ratchet assembly.

6 is a cross-sectional view of a second embodiment of a ratchet structure combined with a flower hub assembly according to the present invention, illustrating that the second embodiment of the present invention is used with another flower hub assembly.

The foregoing and other technical contents, features, and effects of the present invention will be clearly presented in the following detailed description of the preferred embodiments with reference to the drawings. Before proposing a detailed description, it should be noted that in the following description, similar elements are represented by the same reference numerals.

As shown in FIG. 2 and FIG. 3, the ratchet structure combined with the hub assembly according to the first embodiment of the present invention is applicable to a hub assembly 10 having a virtual rotating shaft 11 and the hub assembly 10 along A set of connecting spaces 12 is recessed in the virtual rotating shaft 11, and a ring wall mask of the connecting space 12 has an engaging tooth portion 13. The engaging tooth portion 13 is sequentially provided with a plurality of engaging teeth 131. In this embodiment, the flower hub assembly 10 is a flower hub seat. The ratchet ring structure combined with the flower hub assembly includes a ratchet ring body 20.

The ratchet ring body 20 is rotatably assembled in the assembling space 12 along the virtual rotating shaft 11, and has a first tooth portion 21 that engages with the engaging tooth portion 13, and a first tooth opposite to the first tooth. Second tooth portion 22 of the portion 21. A plurality of ratchet teeth 24 are sequentially protruding from the second tooth portion 22, and a ratchet groove 25 is formed between each of the ratchet teeth 24. A plurality of flowers corresponding to the ratchet grooves 25 are sequentially protruding from the first tooth portion 21. The key teeth 23 make up the weak point between the ratchet teeth 24 on the inner torus of the ratchet ring body 20 through the spline teeth 23 to increase the structural strength. In addition, the plurality of spline teeth 23 and the plurality of engaging teeth 131 are engaged with each other. The circumferential tooth thickness of the spline teeth 23 is less than or equal to half of the circumferential tooth thickness of the engaging teeth 131. The circumferential tooth thickness refers to The distance between the opposite sides of the tooth top connection, the thickness of the circumferential tooth (also known as the tooth thickness): the thickness of the tooth on the graduated circle, which is the arc length, not the linear length.

As shown in FIG. 4, the spline tooth 23 has two inclined surfaces 231 opposite to each other and gradually widening toward the ratchet tooth 24. An inclined surface is formed between the extension of the inclined surface 231 and the extension of the virtual shaft 11 toward the center of the spline tooth 23. The angle 14 is 10 degrees in this embodiment as an example, but is not limited to this. The angle 14 is between 1 degree and 20 degrees. Since the conventional ratchet ring is provided with a plurality of threads on the outer ring surface and the angle of the inclined plane of the thread is 30 degrees, the smaller the angle of the inclined plane angle 30 is, the smaller the radial force it will withstand. When the direction force is reduced, the housing made of aluminum, such as the hub, will also reduce the weight and torque reaction force.

As shown in FIG. 5, the ratchet structure combined with the flower hub assembly of the present invention is matched with a ratchet assembly 30 to illustrate the state of the ratchet ring body 20 when the ratchet assembly 30 is actuated. The ratchet assembly 30 includes a ratchet seat 31, two pawls 32, and two elastic elements 33. When a user steps on the pedal of a bicycle and travels clockwise, the power is transmitted to the flywheel through the chain, which will drive the ratchet seat. 31 spins Turning, the elastic element 33 pops the pawl 32 into contact with the second tooth portion 22 of the ratchet ring body 20, and at this time, the pawl 32 and the ratchet tooth 24 of the ratchet ring body 20 engage with each other, so that the second The tooth portion 22 rotates, and when the ratchet ring body 20 rotates, the flower hub seat is also rotated to move the bicycle forward. When the user rotates in the counter-current direction, the pawl 32 on the ratchet seat 31 will smoothly slide over the ratchet teeth 24 of the ratchet ring body 20, and the pawl 32 will hit the ratchet teeth 24 to answer. The answer is that the hub will not be driven at this time. This condition is called idling.

It is worth mentioning that, as shown in FIG. 6, the second embodiment of the present invention provides a ratchet structure combined with a hub assembly, which is also applicable to a hub assembly. In this embodiment, the flower The hub assembly is a transmission base. Since its operation mode and effect are the same as those of the first embodiment, it will not be described again. As for the second embodiment, the differences are as follows:

A plurality of ratchet teeth 24 are sequentially protruding from the first tooth portion 21, and a ratchet groove 25 is formed between each of the ratchet teeth 24. A plurality of flowers corresponding to the ratchet grooves 25 are sequentially protruding from the second tooth portion 22. Key teeth 23, through which the weak points between the plurality of ratchet teeth 24 on the inner ring surface of the ratchet ring body 20 are compensated by the spline teeth 23, so as to increase the structural strength; when the transmission base rotates, it will also The ratchet ring body 20 is rotated together.

The invention has the following effects:

One is to enhance the reinforced structure, reduce the degree of wear, and extend the service life. In general, in order to allow the ratchet ring to rotate back and forth inside the hub of the hub, most of the outer ring side of the ratchet ring is provided with several first threads, and the inner surface of the hub is provided with the first threads. The second threads are matched with each other to drive the flower hub seat to rotate. However, the hub hub of this design must be quite thick to prevent the thread from being stripped under high torque, and the first thread of the ratchet ring often cannot stably engage with the second thread of the hub hub when the bicycle is operated, resulting in easy wear. Moreover, the service life is reduced; in addition, when the ratchet ring cannot stably engage with the hub, it will be relatively laborious during riding. Therefore, the matching hub assembly of the present invention The combined ratchet ring structure improves the above-mentioned defect. The outer ring surface of the ratchet ring body 20 is modified into the spline teeth 23 for engaging with the hub assembly 10, and the ratchet ring is made up by the plurality of spline teeth 23. The inner ring surface of the body 20 has a weak point between the plurality of ratchet teeth, and the spline teeth 23 have a steep bevel angle 14. When the ratchet ring body 20 receives an axial force, the force usually causes two The sides are relatively displaced, but due to the meshing and stable structure of the sides of the present invention, the two sides are locked to each other, avoiding the relative displacement of the sides, and ensuring the meshing effect to achieve a strengthened structure, reduce the degree of wear, and The purpose of extending service life.

Second, it has better resistance to axial and radial forces. As mentioned above, the present invention uses the spline teeth 23 to achieve a stable meshing effect, so it has the advantages of high torque, no wear during forward and reverse rotation, simple structure, and small turning angle. Since the ratchet ring body 20 uses the spline teeth 23 to make up for the weak points between the ratchet teeth 24, and the spline teeth 23 have an inclined surface 231 that gradually widens toward the ratchet teeth 24, when the ratchet ring body 20 operates, This spline tooth 23 does not generate an axial force like the conventional technique. In addition, the bevel angle 14 formed between the extension of the bevel 231 of the spline tooth 23 and the extension of the virtual rotating shaft 11 toward the center of the spline tooth 23 is smaller than the bevel angles of the plurality of first threads. Next, it does not generate the same large radial force, and the ratchet teeth 24 of the ratchet ring body 20 can effectively reduce the situation that the ratchet teeth 24 are strongly hit by the ratchet teeth.

Third, reduce costs. The thread structure of the conventional technology is prone to wear for a long period of time, which is not only prone to the risk of tooth loss, but also greatly increases the cost of maintenance and lacks economic benefits. Therefore, the spline teeth 23 of the present invention greatly strengthen and stabilize the ratchet ring body 20 and the The meshing effect of the flower hub assembly 10 makes it difficult for the ratchet ring body 20 to disengage from the flower hub assembly 10, and the flower hub assembly 10 does not need to be as thick as the conventional technology, so it is greatly reduced when manufacturing the flower hub assembly 10. The manufacturing cost and the invisible material also reduce the raw materials for manufacturing the hub assembly 10, so that the present invention is much lighter and lighter than the conventional technology, and at the same time has better transmission and light weight effects.

Claims (4)

A ratchet ring structure combined with a flower hub component is suitable for a flower hub component. The flower hub component has a virtual shaft. The flower hub component recesses a group of joint spaces along the virtual axis. The ring wall surface of the joint space has An engaging tooth, wherein the ratchet ring structure combined with the flower hub assembly includes: a ratchet ring body rotatably assembled in the assembling space along the virtual rotation axis, and having an engagement with the engaging tooth A first tooth portion and a second tooth portion opposite to the first tooth portion, when the second tooth portion is convexly provided with a plurality of ratchet teeth, the first tooth portion is convexly provided with a plurality of spline teeth, or When a plurality of ratchet teeth are convexly provided on the first tooth portion, a plurality of spline teeth are convexly provided on the second tooth portion, and a ratchet groove corresponding to each of the spline teeth is formed between each of the ratchet teeth. The ratchet ring structure combined with a flower hub assembly according to claim 1, wherein the flower hub assembly is a flower hub seat. The ratchet ring structure combined with a spline hub assembly according to claim 1, wherein the engaging tooth portion is sequentially provided with a plurality of engaging teeth engaged with the spline tooth, and the circumferential tooth thickness of the spline tooth is less than or equal to The circumferential teeth of the engaging teeth are half thick. The ratchet ring structure combined with a spline hub assembly according to claim 1, wherein the spline teeth have two inclined surfaces that are opposite to each other and gradually widen toward the ratchet teeth, and the extension of the inclined surface and the virtual shaft extend toward the center of the spline teeth. A bevel angle is formed between the positions, and the bevel angle is between 1 degree and 20 degrees.