High-strength bicycle chain

Abstract

A high-strength bicycle chain belongs to the technical field of transmission chains and comprises a chain body formed by assembling inner chain plates, outer chain plates, pin shafts and rollers, the thicknesses of the outer chain plates and the inner chain plates of the chain body are 1.0 mm respectively, the height of the rollers is 1.78 mm, the distance between the middle portions of the inner surfaces of the two opposite inner chain plates of the same inner chain link is 2.3-2.4 mm, and the distance between the middle portions of the inner surfaces of the two opposite inner chain plates of the same inner chain link is 2.3-2.4 mm. And the distance between the middle parts of the inner surfaces of the two opposite outer chain plates of the same outer chain link is 4.1-4.2 mm. The utility model provides a high-strength bicycle chain which can fully meet the use requirement of an electric power-assisted bicycle and solves the problem that an existing electric power-assisted bicycle chain is insufficient in strength.

Description

Technical Field

[0001] This invention belongs to the field of transmission chain technology, specifically relating to a high-strength bicycle chain. Background Technology

[0002] With the development of the electric-assist bicycle industry, more and more new electric-assist bicycle manufacturers are emerging, and the power of mid-drive electric-assist bicycle motors is also increasing. However, with the increase in motor power, the original chain can no longer meet the strength requirements of existing electric-assist bicycles, and it is necessary to develop a brand-new high-strength bicycle chain. Utility Model Content

[0003] This invention discloses a high-strength bicycle chain, which aims to solve the problem that "with the development of electric bicycles, the chain strength cannot meet the requirements".

[0004] To achieve the above objectives, the technical solution of this invention is as follows:

[0005] A high-strength bicycle chain includes a chain body assembled from an inner chain plate, an outer chain plate, a pin, and rollers. The outer chain plate and the inner chain plate of the chain body are each 1.0 mm thick, the rollers are 1.78 mm high, the distance between the middle of the inner surfaces of two opposite inner chain plates of the same inner chain link is 2.3-2.4 mm, and the distance between the middle of the inner surfaces of two opposite outer chain plates of the same outer chain link is 4.1 mm to 4.2 mm.

[0006] Preferably, the middle of the inner surface of the outer chain plate is thinned to form a concave first flat surface, and the distance between the first flat surface and the outer surface of the outer chain plate is 0.85-0.9mm.

[0007] Preferably, the inner surface of the inner chain plate is thinned to form a concave second flat surface, and the distance between the second flat surface and the outer surface of the inner chain plate is 0.75-0.78 mm.

[0008] Preferably, the lower edge of the outer surface of the head of the outer chain plate is provided with a chamfered surface.

[0009] Preferably, the chain body includes alternating inner and outer links. The inner link includes an inner plate and rollers. The edges of the two first link plate holes of the inner plate are coaxially provided with outwardly protruding annular ridges. The two inner plates are arranged opposite each other, and the annular ridges of the two inner plates are opposite to each other. Rollers are fitted together on the opposite annular ridges with clearance. The outer link includes an outer plate and a pin. The outer plate is provided with two second link plate holes. The two outer plates are arranged opposite each other, and the second link plate holes of the two outer plates are opposite to each other. The pin passes through the opposite second link plate holes. The two ends of the pin are respectively interference-fitted with the corresponding second link plate holes. The pin passes through the two first link plate holes of the adjacent inner link and is clearance-fitted with the first link plate holes.

[0010] The beneficial effects of this new high-strength bicycle chain are as follows:

[0011] This invention provides a high-strength bicycle chain that can fully meet the needs of electric-assisted bicycles and solves the problem of insufficient strength in existing electric-assisted bicycle chains. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention;

[0013] Figure 2 This is a top view of the structure of this novel invention. Figure 1 ;

[0014] Figure 3 This is a top view of the structure of this novel invention. Figure 2 ;

[0015] Figure 4 Here are structural schematic diagrams of the new type of outer chain plate in various postures;

[0016] Figure 5 This is a schematic diagram of the structure of the novel inner chain plate.

[0017] Figure 6 This is a schematic diagram of the assembly structure of this novel invention.

[0018] The markings in the diagram are: 01, outer link plate; 02, inner link plate; 03, roller; 04, annular ridge; 05, pin; 06, pin end flush with the outer surface of the outer link plate; 1, outer surface of the outer link plate; 2, first flat surface; 3, second flat surface; 4, outer surface of the inner link plate; 5, chamfered surface; 6, end face one; 7, end face two; 8, end face three; 9, end face four. Detailed Implementation

[0019] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0020] The following embodiments can be understood as a part of the local structure or method of the present invention, or as a combination of embodiments to explain the connotation of a larger range of structures or methods of the present invention.

[0021] Example 1

[0022] A high-strength bicycle chain, such as Figure 1-6 As shown, the chain body comprises an inner chain plate 02, an outer chain plate 01, a pin 05, and a roller 03. The outer chain plate 01 and the inner chain plate 02 of the chain body have a thickness of 1.0 mm, and the roller 03 has a height of 1.78 mm. The distance between the middle of the inner surfaces of two opposing inner chain plates 02 in the same inner chain link is 2.3-2.4 mm (i.e., the distance between end face 6 and end face 7 is 2.3-2.4 mm). The distance between the middle of the inner surfaces of two opposing outer chain plates 01 in the same outer chain link is 4.1 mm to 4.2 mm (i.e., the distance between end face 8 and end face 9 is 4.1 mm to 4.2 mm).

[0023] Example 2

[0024] Based on Embodiment 1, this embodiment discloses, as follows: Figure 4 As shown, the inner surface of the outer chain plate 01 is thinned to form a concave first flat surface 2 (i.e., end face 3 8 or end face 4 9), and the distance between the first flat surface 2 and the outer surface 1 of the outer chain plate is 0.85-0.9mm.

[0025] like Figure 5 As shown, the inner surface of the inner chain plate 02 is thinned to form a concave second flat surface 3 (i.e., end face 6 or end face 7), and the distance between the second flat surface 3 and the outer surface 4 of the inner chain plate is 0.75-0.78mm.

[0026] like Figure 1 As shown, the lower edge of the outer surface of the head of the outer chain plate 01 is provided with a chamfered surface 5.

[0027] Example 3

[0028] Based on embodiments 1 and 2, this embodiment discloses, as follows: Figure 6As shown, the chain body includes alternating inner and outer links. The inner link includes an inner link plate 02 and rollers 03. The inner link plate 02 has two first link plate hole edges with outwardly protruding annular ridges 04 on the coaxial edge. The two inner link plates 02 are arranged opposite each other, and the annular ridges 04 of the two inner link plates are opposite to each other. Rollers 03 are fitted together on the opposite annular ridges 04 with clearance. The outer link includes an outer link plate 01 and pins 05. The outer link plate 01 has two second link plate holes. The two outer link plates 01 are arranged opposite each other, and the second link plate holes of the two outer link plates 01 are opposite to each other. Pins 05 pass through the opposite second link plate holes. The two ends of the pins 05 are respectively interference-fitted with the corresponding second link plate holes. The pins 05 pass through the two first link plate holes of adjacent inner links and are clearance-fitted with the first link plate holes.

[0029] The working principle of this new type:

[0030] 1. The thickness A of the outer link plate is 1.00mm and the thickness B of the inner link plate is 1.00mm. This ensures that the strength is more than 50% higher than the strength requirement in GB / T3579-2006, which can meet the strength requirements of the maximum power mid-drive motor required by the national standard.

[0031] 2. However, as the thickness of the chain plates increases, the entire chain becomes wider, failing to meet the original requirements for the spacing between the freewheel and crankset chainrings, resulting in greater noise. Even the chamfered surface 5 cannot alleviate this issue. Therefore, the roller height C is designed to be 1.78mm. The distance between the midpoints of the inner surfaces of the two opposing inner chain plates 02 on the same inner link is 2.3-2.4mm (i.e., the distance between end face 6 and end face 7 is 2.3-2.4mm). The distance between end face 6 and end face 7 is greater than that of a traditional 10-speed bicycle chain, which can significantly reduce the impact noise between the guide wheel 16 and the chain body. At the same time, the distance between the midpoints of the inner surfaces of the two opposing outer chain plates 01 on the same outer link is 4.1mm to 4.2mm (i.e., the distance between end face 8 and end face 9 is 4.1mm to 4.2mm), ensuring smooth cooperation with the sprockets of the bicycle chain drive system and fully meeting the original requirements for the spacing between the freewheel and crankset chainrings.

[0032] 3. To reduce the weight of the chain and in accordance with the above design, the inner surface of the outer chain plate 01 is thinned to form a concave first flat surface 2 (i.e., end face 3 8 or end face 4 9), and the distance between the first flat surface 2 and the outer surface 1 of the outer chain plate is 0.85-0.9mm. Simultaneously, the inner surface of the inner chain plate 02 is thinned to form a concave second flat surface 25 (i.e., end face 1 6 or end face 2 7), and the distance between the second flat surface 25 and the outer surface 26 of the inner chain plate is 0.75-0.78mm.

[0033] Through the above improvements, this new type of bicycle chain provides a high-strength bicycle chain that can fully meet the needs of electric-assisted bicycles.

Claims

1. A high-strength bicycle chain, comprising a chain body assembled from an inner chain plate, an outer chain plate, a pin, and rollers, characterized in that: The outer and inner chain plates of the chain body have a thickness of 1.0 mm, the roller height is 1.78 mm, the distance between the middle of the inner surfaces of two opposite inner chain plates of the same inner chain link is 2.3-2.4 mm, and the distance between the middle of the inner surfaces of two opposite outer chain plates of the same outer chain link is 4.1 mm to 4.2 mm.

2. The high-strength bicycle chain as described in claim 1, characterized in that: The inner surface of the outer chain plate is thinned to form a concave first flat surface, and the distance between the first flat surface and the outer surface of the outer chain plate is 0.85-0.9mm.

3. A high-strength bicycle chain as described in claim 2, characterized in that: The inner surface of the inner chain plate is thinned to form a concave second flat surface, and the distance between the second flat surface and the outer surface of the inner chain plate is 0.75-0.78mm.

4. A high-strength bicycle chain as described in claim 3, characterized in that: The lower edge of the outer surface of the head of the outer chain plate is chamfered.

5. A high-strength bicycle chain as described in claim 4, characterized in that: The chain body includes alternating inner and outer links. Each inner link includes an inner plate and rollers. The edges of the two first chain plate holes of the inner plate are coaxially provided with outwardly protruding annular ridges. The two inner plates are arranged opposite each other, and the annular ridges of the two inner plates are aligned one-to-one. Rollers are fitted together on the aligned annular ridges with a clearance fit. Each outer link includes an outer plate and a pin. The outer plate has two second chain plate holes. The two outer plates are arranged opposite each other, and the second chain plate holes of the two outer plates are aligned one-to-one. A pin passes through each aligned second chain plate hole, and both ends of the pin are interference-fitted with the corresponding second chain plate holes. The pin passes through the two first chain plate holes of adjacent inner links and has a clearance fit with the first chain plate holes.

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