TWM522180U - Transmission chain - Google Patents

Description

Drive chain

This creation is about a chain, especially a transmission chain that can be used for power transmission applications such as bicycles and motor vehicles.

At present, a conventional transmission chain structure for power transmission applications is used, which comprises a multi-array four-element link unit, the multi-array four-element link unit is serially connected in series, and each set of four-element link units includes two An inner chain plate, a chain roller, two outer chain plates and a chain pin, wherein the two inner chain plates are oppositely disposed, the chain roller is disposed between one end of the two inner chain plates, and the two outer chain plates are opposite The two inner chain plates are disposed outside one end of the chain roller, and the chain pin is disposed between the two inner chain plates, the chain roller and the two outer plates.

The aforementioned transmission chain can be applied to power transmission applications such as bicycles and motor vehicles. However, based on the demand for larger power transmissions, the drive chain must have a corresponding increase in mechanical strength for the construction of its link unit. Therefore, the conventional transmission chain usually provides an annular flange inside the chain roller which is provided by the rotation of the sprocket of the sprocket, and a convex portion of the chain roller is protruded from the side of the inner chain plate, and the chain roller protrudes into the chain roller. In the side end, it is used to combine the chain pin to provide the necessary supporting force for the chain roller transmission.

However, the existing transmission chain can increase the mechanical strength by forming an annular flange inside the chain roller and a combined structure of the protruding portion of the chain roller protruding from the side of the inner chain plate into the side end of the chain roller. However, the length of the chain roller protrusion protruding laterally of the existing inner chain plate is smaller than the thickness of the inner chain plate, or the proper size setting of the inner chain plate thickness is not obtained, so that the mechanical strength of the existing transmission chain has not been able to Achieving a better state requires further improvement.

The main purpose of the present invention is to provide a drive chain to solve the problem of insufficient strength of the four-component link unit of the existing drive chain.

In order to achieve the purpose of the previous disclosure, the present invention provides a drive chain system comprising a plurality of link units, the plurality of link units are connected in series, each link unit comprises: two inner link plates, which are oppositely arranged, each The inner chain plate has an inner chain plate body, and two ends of the inner chain plate body respectively form a circular arc segment, and the same side faces of the two circular arc segments respectively protrude outwardly from the circular tubular chain roller pivot portion, and the chain roller pivot An inner chain pin hole penetrating through the inner chain plate body is formed in the portion, and a ratio of a thickness of the inner chain plate body to a length of the chain roller pivot portion protruding from a side surface of the inner chain plate body is between 0.5 and 3. a chain roller disposed between the corresponding arc segments of one of the two inner chain plates, the chain roller comprising an axially penetrating tubular tubular roller body and a middle section formed on the inner wall of the chain roller body a reinforcing ring portion protruding radially toward the center, a joint portion is formed inside the two ends of the chain roller body, and an inner hole portion connecting the two joint portions is formed in the reinforcing ring portion, and the two inner chain plates are The chain roller pivots are respectively pivotally arranged in the joint section of the chain roller; two outer chain plates, each outer chain An arc segment is formed at each end of the plate, and the two outer chain plates respectively form an outer chain pin hole in the arc segment thereof, and the two outer chain plates are respectively disposed in the two parallel rows with the arc segments at one end thereof An outer side of the arc segment of one end of the chain plate, the outer pin hole corresponding to the inner pin hole; and a chain pin extending through the outer pin hole of the outer chain plate and the inner chain plate Inner chain pin hole and inside the chain roller.

By the creation of the front drive chain, the main part is to use the reinforcing ring part formed inside the chain roller and the two inner chain plates which are oppositely disposed, and the chain roller pivot parts are respectively placed inside the two ends of the chain roller, by the inner chain plate The chain roller pivot joint in combination with the chain pin provides a greater support of the chain roller to provide good mechanical strength. Moreover, the present invention further utilizes the length of the chain roller pivot of the two inner link plates of each link unit to be 0.5 to 3 times the thickness of the inner link plate. Under the optimal size ratio control, the mechanical strength of the transmission chain can be achieved in an ideal state, so that the transmission chain maintains good transmission stability during the transmission process.

The present invention can further utilize the inner link plate to form a ring groove portion on the outer circumference of the inner chain pin hole on the other side of the chain roller pivot portion, and the outer link plate faces the inner link plate side to form a hole from the outer chain pin hole a laterally projecting ring flange extending correspondingly into the annular groove portion for enhancing the mechanical strength of each chain unit of the drive chain. In addition, the length of the chain roller pivot portion of the two inner link plates of each link unit is set to be 0.5 to 1.8 of the thickness of the inner link plate, which is an optimum size ratio, so that the mechanical strength of the transmission chain is made. Can achieve a more ideal state.

As shown in FIG. 1 , a preferred embodiment of the present invention is disclosed. The transmission chain includes a plurality of link units 10 connected in series, and the link unit 10 is a four-element combined structure, wherein each The one link unit 10 includes two inner link plates 20, a chain roller 30, two outer link plates 40, and a chain pin 50.

As shown in FIG. 2 and FIG. 3, the two inner link plates 20 are oppositely disposed. Each inner link plate 20 has an inner chain plate body 21, and two ends of the inner chain plate body 21 respectively form a circular arc segment 22, The inner chain plate body 21 protrudes outwardly from the same side surface of the two circular arc segments 22 to form a circular tubular chain roller portion 23, and the chain roller pivot portion 23 defines a circular inner chain extending through the inner chain plate body 21. The pin hole 24, as shown in FIG. 3 and FIG. 4, wherein the ratio of the thickness T of the inner chain plate body 21 to the length L of the chain roller pivot portion 23 protruding from the side surface of the inner chain plate body 21 is 0.5 to 3. The ratio of the thickness T of the inner chain plate body 21 to the length L of the chain roller hinge portion 23 projecting from the side surface of the inner chain plate body 21 is preferably 0.5 to 1.8.

As shown in FIGS. 2 and 3, the chain roller 30 includes a tubular tubular roller body 31 that penetrates in the axial direction and a reinforcing ring portion 32 that is formed on the inner wall of the chain roller body 31. The middle portion is radially protruded toward the center, and a joint portion 33 is formed in each of the two ends of the chain roller body 31, and an inner hole portion 34 communicating with the two joint portions 33 is formed in the reinforcing ring portion 32. The chain roller 30 is disposed between the arc segments 22 corresponding to one of the two inner chain plates 20, and the chain roller pivot portions 23 of the two inner chain plates 20 respectively correspond to the joint intervals of the chain roller 30. 33.

In the preferred embodiment shown in FIGS. 2 and 3, the inner diameter of the joint portion 33 of the chain roller 30 corresponds to the outer diameter of the straight tubular chain roller portion 23 of the inner link plate 20, and the chain roller The radial thickness of the reinforcing ring portion 32 of 30 corresponds to the thickness of the side wall of the straight tubular chain roller portion 23 of the inner link plate 20, so that the inner chain pin hole 24 of the inner link plate 20 corresponds to the reinforcing ring of the chain roller 30. The bore portion 34 in the portion 32 has an aperture.

As shown in FIG. 2 and FIG. 3, the two outer chain plates 40 respectively form a circular arc segment 41, and the two outer chain plates 40 respectively form an outer chain pin hole 42 in the arc segment 41 thereof. The chain plates 40 are respectively disposed on the outer side of the circular arc segment 22 at one end of the two adjacent inner link plates 20 with the arc segments 41 at one end thereof, and the outer chain pin holes 42 correspond to the inner chain pin holes 24.

As shown in FIG. 4, the inner link plate 20 can also form a ring groove portion 25 at the periphery of the inner chain pin hole 24 on the other side of the chain roller pivot portion 23. The outer link plate 40 A ring flange 43 projecting laterally from the hole edge of the outer chain pin hole 42 is formed on the side surface of the inner link plate 20, and the ring flange 43 projects in the ring groove portion 25.

As shown in FIG. 2 and FIG. 3 , the chain pin 50 is disposed through the outer chain pin hole 42 of the two outer link plates 40 , the inner chain pin hole 24 of the two inner link plates 20 , and the inside of the chain roller 30 , or The chain pin 50 extends from the two ends of the outer side of the two outer chain plates 40 to form a larger outer diameter end.

As shown in FIG. 3, the link unit 10 is connected in series to form an endless chain, and the endless chain can be wound between the plurality of sprockets to provide a flexible transmission member. When the chain is driven between the sprocket wheels, the endless chain uses the chain roller 30 of each link unit 10 to provide a portion to which the sprocket portion of the sprocket rotates. Here, the reinforcing ring portion 32 formed inside the chain roller 30 and the opposite inner two-ring plates 20 are respectively placed inside the both ends of the chain roller 30 by the chain roller hinge portions 23, thereby providing good mechanical strength. Moreover, the present invention further sets the ratio of the thickness T of the inner chain plate body 21 of each link unit 10 to the length L of the chain roller pivot portion 23 of the inner link plate 20 to be between 0.5 and 3. Thus, under the optimal size ratio control, the mechanical strength of the transmission chain can be achieved in an ideal state, so that the transmission chain maintains good transmission stability during the transmission process.

10‧‧‧ link unit
20‧‧‧Inner chain board
21‧‧‧Inner chain plate
22‧‧‧Arc segment
23‧‧‧Chain roller
24‧‧‧Inner chain pin hole
25‧‧‧ Ring groove
T‧‧‧ plate thickness of the inner chain plate
The length of the L‧‧‧ chain roller pivot from the side of the inner chain plate
30‧‧‧Chain Roller
31‧‧‧Chain roller body
32‧‧‧ Strengthening the ring
33‧‧‧ Combination interval
34‧‧‧ Inner hole section
40‧‧‧Outer chain board
41‧‧‧ arc segment
42‧‧‧Outer chain pin hole
43‧‧‧ ring flange
50‧‧‧Chain

1 is a perspective view of a portion of a link unit of a preferred embodiment of the present invention. 2 is a perspective exploded view of the link unit shown in FIG. 1. Figure 3 is a schematic cross-sectional view showing a portion of the link unit shown in Figure 1. 4 is a schematic cross-sectional view showing a portion of a link unit of another preferred embodiment of the present drive chain.

10‧‧‧ link unit

20‧‧‧Inner chain board

21‧‧‧Inner chain plate

22‧‧‧Arc segment

23‧‧‧Chain roller

24‧‧‧Inner chain pin hole

T‧‧‧ plate thickness of the inner chain plate

The length of the L‧‧‧ chain roller pivot from the side of the inner chain plate

30‧‧‧Chain Roller

31‧‧‧Chain roller body

32‧‧‧ Strengthening the ring

33‧‧‧ Combination interval

34‧‧‧ Inner hole section

40‧‧‧Outer chain board

41‧‧‧ arc segment

42‧‧‧Outer chain pin hole

50‧‧‧Chain

Claims (5)

A transmission chain includes a plurality of link units, wherein the plurality of link units are connected in series, each link unit comprises: two inner link plates, which are oppositely arranged, and each inner link plate has an inner link plate body The two ends of the inner chain plate body respectively form a circular arc segment, and the same side surface of the two circular arc segments respectively protrude outwardly from the circular tubular chain roller pivot portion, and the chain roller pivot portion forms a through-the inner chain An inner chain pin hole of the plate body, and a ratio of a thickness of the inner chain plate body to a length of the chain roller pivot portion protruding from a side surface of the inner chain plate body is between 0.5 and 3; a chain roller, Between the corresponding circular arc segments of one of the two inner chain plates, the chain roller comprises an axially penetrating circular tubular chain roller body and a central direction formed at a middle portion of the inner wall of the chain roller body a reinforcing ring portion is formed, a joint portion is formed in each of the two ends of the chain roller body, and an inner hole portion connecting the two joint portions is formed in the reinforcing ring portion, and the chain roller of the two inner chain plates is formed The pivot portions are respectively pivotally arranged in the joint section of the chain roller; the two outer chain plates are respectively formed at two ends of each outer chain plate a circular arc segment, wherein the two outer chain plates respectively form an outer chain pin hole in the arc segment thereof, and the two outer chain plates are respectively disposed on the one end of the two parallel inner chain plates with a circular arc segment at one end thereof Outside the arc segment, the outer chain pin hole corresponds to the inner chain pin hole; and a chain pin is disposed through the outer chain pin hole of the two outer link plates, the inner chain pin hole of the two inner link plates, and Inside the chain roller. The transmission chain of claim 1, wherein a ratio of a thickness of the inner chain plate body to a length of the chain roller pivot portion protruding from a side surface of the inner chain plate body is 0.5 to 1.8. The transmission chain according to claim 1 or 2, wherein an inner diameter of a coupling section at both ends of the chain roller corresponds to an outer diameter of a straight circular tubular chain roller portion of the inner chain plate, and a reinforcing ring of the chain roller The radial thickness of the portion corresponds to the thickness of the sidewall of the straight tubular chain roller of the inner link plate, and the inner pin hole diameter of the inner link corresponds to the inner bore diameter of the reinforcing ring of the chain roller . The transmission chain of claim 1 or 2, wherein the inner link plate forms a ring groove portion on a periphery of an inner chain pin hole on the other side of the chain roller pivot portion, the outer link plate facing the inner portion The side of the link plate forms a ring flange projecting laterally from the edge of the outer pin hole, and the ring flange projects correspondingly in the ring groove portion. The transmission chain of claim 3, wherein the inner link plate forms a ring groove portion on a periphery of an inner chain pin hole on the other side of the chain roller pivot portion, the outer link plate facing the inner link plate The side surface defines a ring flange projecting laterally from the edge of the outer chain pin hole, and the ring flange projects correspondingly in the ring groove portion.