TW201641836A - Belt and belt pulley device with a positioning structure - Google Patents

Abstract

A belt and belt pulley device with a positioning structure, which includes a belt pulley having a restriction groove, and a belt provided with a plurality of corresponding protrusions each having a restriction protrusion, the restriction protrusions are locked in the restriction groove, so as to prevent the belt from sliding relative to the belt pulley, and the restriction protrusions of the belt can avoid damaging the overall structure of the belt, which can fix the belt to the belt pulley while maintaining the integrity of the belt structure.

Description

Belt and pulley with positioning structure

The present invention relates to a bicycle part, and more particularly to a belt and pulley having a positioning structure.

Bicycles are both environmentally friendly and have low pollution emissions. They are excellent means of transportation and sports equipment. Therefore, they are widely loved by the public today. The bicycle transmission can be roughly divided into two types, one of which is made of metal chains. a bicycle with a disk drive, and a bicycle with a belt drive;

The bicycle that utilizes the belt drive, as shown in FIG. 1 , includes a pulley 70 and a belt 80 wound around the pulley 70. The pulley 70 has a first side 71 and a second side 72 opposite to each other, and A first side surface 71 and a circumferential surface 73 of the second side surface 72 are connected. The belt 80 is disposed around the circumferential surface 73 of the pulley 70. One side of the belt 80 faces the circumferential surface 73. The pulley 70 is provided. In combination with a crankset G, the pulley 70 is synchronized with the crankset G. The circumferential surface 73 of the pulley 70 is provided with a meshing tooth 74. The meshing gear 74 is composed of a plurality of convex portions 741 and a plurality of concave portions 742. The convex portion 741 and the concave portions 742 are spaced apart from each other, and the circumferential surface 73 is defined as a circumferential direction R, and the axial direction of the pulley 70 is an axial direction S, and each of the concave portions 742 and each of the concave portions 742 The convex portion 741 extends along the axial direction S. The length of the belt 80 in the axial direction S is a corresponding length M, and the length of the circumferential surface 73 of the pulley 70 in the axial direction S is a predetermined length N, the predetermined length. The N system is greater than the corresponding length M;

The belt 80 has a plurality of corresponding engaging teeth 81 facing one side of the circumferential surface of the pulley 70. The corresponding engaging teeth 81 are composed of a plurality of corresponding convex portions 811 and a plurality of corresponding concave portions 812. The corresponding convex portions 811 and the corresponding concave portions 812 are formed. For the interval, each corresponding concave portion 812 and each corresponding convex portion 811 extend along the axial direction S. The corresponding concave portion 812 of the belt 80 corresponds to the convex portion 741 of the pulley 70, and the convex portion 811 of the belt 80 and the portion The recess 742 of the pulley 70 corresponds.

However, the corresponding length M of the belt 80 is smaller than the predetermined length N of the pulley 70, and the convex portion 741 and the concave portion 742 of the pulley 70 and the corresponding convex portion 811 and the corresponding concave portion 812 of the belt 80 are all opened along the axial direction Y. When the user rides the bicycle, the belt 80 will slide along the axial direction S relative to the pulley 70, which will cause the belt 80 to wear or even be damaged over time;

In order to overcome the foregoing problems, the industry has developed a belt and a pulley having a positioning structure. As shown in FIG. 2, the pulley 70 is further formed with a limiting protrusion 75 in each of the recesses 742, and the limiting protrusion 742 is along the circumference. The direction R extends, and the limiting protrusions 75 are respectively connected to the convex portions 741 on both sides of the concave portion 742;

The corresponding convex portion 811 of the belt 80 defines a limiting slot 813, and the limiting slot 813 extends along the circumferential direction R. The limiting protrusion 75 of the pulley 70 is engaged with the limiting slot of the belt 80. 813; since the limit projection 75 of the pulley 70 is engaged in the limiting groove 813 of the belt 80, the belt 80 cannot be slid relative to the pulley 70 along the axial direction S.

The above-mentioned method is to form the limiting protrusions 813 by the recesses 742 of the pulleys 70. The corresponding protrusions 811 of the belts 80 open the limiting slots 813, so that the limiting protrusions 75 are disposed in the limiting slots 813. The limiting protrusion 75 is locked by the limiting slot 813, thereby preventing the belt 80 from slipping relative to the pulley 70. However, opening the limiting slot 813 in the corresponding convex portion 811 of the belt 80 will destroy the belt. The overall structure of the 80 reduces the structural strength of the belt 80, thereby shortening the service life of the belt 80.

The present invention provides a belt and pulley having a locating structure whose primary purpose is to enable the belt to be positioned on the pulley prior to maintaining structural integrity of the belt.

To achieve the foregoing objective, the present invention provides a belt and pulley having a positioning structure for coupling with a crank set and a rear pulley for coupling a drive shaft, and the belt and the pulley having the positioning structure, include:

a pulley and a belt wound around the pulley, the belt extending to the rear pulley and wound around the rear pulley, the pulley having a first side and a second side opposite to each other, and connecting the first side And a circumferential surface of the second side, the belt is disposed on a circumferential surface of the pulley, the pulley is fixedly coupled with the crank set, and two sides of the circumferential surface of the pulley are respectively provided with a meshing tooth, and the meshing The tooth system is composed of a plurality of convex portions and a plurality of concave portions, the convex portions and the concave portions are spaced apart, and a limiting groove is formed between the meshing teeth;

The belt has a plurality of corresponding engaging teeth facing one side of the circumferential surface of the pulley, and the corresponding engaging teeth are formed by a plurality of corresponding convex portions and a plurality of corresponding concave portions, wherein the corresponding convex portions and the corresponding concave portions are spaced apart, and the corresponding convex portions are disposed A restricting protrusion is formed on the portion, and the corresponding concave portion of the belt corresponds to the convex portion of the pulley, and the corresponding convex portion of the belt corresponds to the concave portion of the pulley, and the limiting convex portion of the belt is located in the limiting groove of the pulley.

As can be seen from the foregoing, the belt and the pulley having the positioning structure of the present invention mainly open the limiting groove by the pulley, and the corresponding convex portions of the belt respectively form a limiting protrusion, so that the limiting protrusion is disposed in the limiting groove. Preferably, the present invention is configured to prevent the belt from slipping relative to the pulley by the restricting groove; preferably, the invention is formed by forming a limiting protrusion on each of the corresponding convex portions of the belt, which is different from the conventional The corresponding convex portions of the belt respectively open the restricting groove, thereby avoiding damage to the overall structure of the belt, thereby achieving the purpose of positioning the belt to be positioned on the pulley before maintaining the structural integrity of the belt.

In order to enable your review committee to have a better understanding and understanding of the purpose, features and effects of the present invention, please refer to the following for a brief description of the following:

The present invention provides a belt and a pulley having a positioning structure, as shown in FIGS. 3 to 5, which are combined with a crank set A and a rear pulley, and the crank set A is fixedly coupled with a drive shaft B, and the The belt and pulley of the positioning structure include:

a pulley 10 and a belt 20 wound around the pulley 10, the belt 20 extending to the rear pulley and being wound around the rear pulley, thereby enabling the pulley 10 and the rear pulley to operate synchronously, the pulley 10 The first side 11 and the second side 12 are opposite to each other, and the first side 11 and the second side 12 are connected to the circumferential surface 13 . The belt 20 is disposed around the circumferential surface 13 of the pulley 10 . The pulley 10 is annular, and the pulley 10 is fixedly coupled with the crank group A, so that the pulley 10 can operate synchronously with the crank set A and the transmission shaft B. The two sides of the circumferential surface 13 of the pulley 10 are respectively ringed. The engaging teeth 14 and the engaging teeth 14 are formed by a plurality of convex portions 141 and a plurality of concave portions 142. The convex portions 141 and the concave portions 142 are spaced apart, and a limiting groove 15 is defined between the engaging teeth 14. The circumferential surface 13 extends in a circumferential direction X, and the axial direction of the pulley 10 is an axial direction Y. Each of the concave portions 142 and each of the convex portions 141 extend along the axial direction Y, and the limiting groove 15 is Extending along the circumferential direction X;

One side of the belt 20 facing the circumferential surface 13 of the pulley 10 has a plurality of corresponding engaging teeth 21, and the corresponding engaging teeth 21 are composed of a plurality of corresponding convex portions 211 and a plurality of corresponding concave portions 212, and the corresponding convex portions 211 and the corresponding portions The concave portions 212 are spaced apart from each other, and the corresponding convex portions 211 are respectively formed with a limiting protrusion 22, and the corresponding concave portions 212 and the corresponding convex portions 211 extend along the axial direction Y, and the corresponding concave portion 212 of the belt 20 and the pulley Corresponding to the convex portion 141 of the belt 10, the corresponding convex portion 211 of the belt 20 corresponds to the concave portion 142 of the pulley 10. The restricting projection 22 of the belt 20 is located in the limiting groove 15 of the pulley 10, and the limiting projection 22 of the belt 20 is The limit groove 15 of the pulley 10 is restricted, whereby the belt 20 cannot be slipped in the axial direction Y relative to the pulley 10.

As can be seen from the foregoing, the belt and the pulley having the positioning structure of the present invention mainly open the limiting groove 15 by the pulley 10, and the corresponding convex portions 211 of the belt 20 respectively form a limiting protrusion 22, so that the limiting protrusion 22 is formed. The restricting groove 15 is disposed in the limiting groove 15 to prevent the belt 20 from slipping relative to the pulley 10; preferably, the present invention is due to the corresponding convexity of the belt 20. A limiting protrusion 22 is formed on the portion 211, and the limiting groove 813 is opened in the corresponding convex portion 811 of the belt 80, thereby avoiding damaging the overall structure of the belt 20, thereby achieving retention. The structural integrity of the belt 20 is previously lifted for the purpose of positioning the belt 20 to the pulley 10.

"Knowledge Technology"
70‧‧‧ Pulley
71‧‧‧ first side
72‧‧‧ second side
73‧‧‧Circular surface
74‧‧‧Meshing teeth
741‧‧‧ convex
742‧‧‧ recess
75‧‧‧Limited convex
80‧‧‧Land
81‧‧‧Corresponding meshing teeth
811‧‧‧ corresponding convex
812‧‧‧ corresponding recess
813‧‧‧ Limit slot
G‧‧‧ crank group
M‧‧‧ corresponding length
N‧‧‧Predetermined length
R‧‧‧ circumferential direction
S‧‧‧Axis "Invention"
10‧‧‧ Pulley
11‧‧‧ first side
12‧‧‧ second side
13‧‧‧Circular surface
14‧‧‧Meshing teeth
141‧‧‧ convex
142‧‧‧ recess
15‧‧‧limit slot
20‧‧‧Land
21‧‧‧Corresponding meshing teeth
211‧‧‧ corresponding convex
212‧‧‧ corresponding recess
22‧‧‧Limited convex
A‧‧‧ crank group
B‧‧‧ drive shaft
X‧‧‧ circumferential direction
Y‧‧‧ axial

Figure 1 is a perspective view of a conventional pulley and belt. Figure 2 is a schematic perspective view of a conventional pulley and belt. 3 is a perspective view of a belt and a pulley having a positioning structure according to the present invention. 4 is a partial enlarged view of a belt and a pulley having a positioning structure according to the present invention. Figure 5 is a cross-sectional view of a belt and pulley having a positioning structure of the present invention.

10‧‧‧ Pulley

11‧‧‧ first side

12‧‧‧ second side

13‧‧‧Circular surface

14‧‧‧Meshing teeth

141‧‧‧ convex

142‧‧‧ recess

15‧‧‧limit slot

20‧‧‧Land

21‧‧‧Corresponding meshing teeth

211‧‧‧ corresponding convex

212‧‧‧ corresponding recess

22‧‧‧Limited convex

A‧‧‧ crank group

B‧‧‧ drive shaft

X‧‧‧ circumferential direction

Y‧‧‧ axial

Claims (2)

A belt and pulley having a positioning structure for coupling with a crank set and a rear pulley for coupling a drive shaft, and the belt and the pulley having the positioning structure include: a pulley and a winding a belt of the pulley extending to the rear pulley and wound around the rear pulley, the pulley having a first side and a second side opposite to each other, and connecting the first side and the second side a circumferential surface, the belt is disposed around the circumferential surface of the pulley, the pulley is fixedly coupled with the crank set, and two sides of the circumferential surface of the pulley are respectively provided with a meshing tooth, and the meshing tooth is composed of a plurality of convex portions And a plurality of concave portions, wherein the convex portions and the concave portions are spaced apart, and a matching groove is formed between the engaging teeth; the belt has a plurality of corresponding engaging teeth facing one side of the circumferential surface of the pulley, and the corresponding meshing teeth are plural Corresponding to the convex portion and the plurality of corresponding concave portions, the corresponding convex portions and the corresponding concave portions are spaced apart, and the corresponding convex portions are respectively formed with a limiting protrusion, the skin The corresponding concave portion of the belt corresponds to the convex portion of the pulley, and the corresponding convex portion of the belt corresponds to the concave portion of the pulley, and the limiting convex portion of the belt is located in the limiting groove of the pulley. The belt and the pulley having the positioning structure according to claim 1, wherein the side of the circumferential surface is defined as a circumferential direction, and the axial direction of the pulley is an axial direction, and each of the concave portions and each of the convex portions The portion extends along the axial direction, and the limiting groove extends along the circumferential direction, and each of the corresponding concave portions and each of the corresponding convex portions extends along the axial direction.