Timing roller chain of engine system
By using plastic inserts and cryogenically treated slotted sleeves in the engine timing chain, the problem of contact friction between the chain plate and the guide plate is solved, achieving low friction, lightweight and improved wear resistance.
Patent Information
- Application Number
- CN202423100795.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-16
Smart Images
Figure CN223483310U_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of chain drive technology, specifically relating to a timing roller chain for an engine system. Background Technology
[0002] With the rapid development of the engine industry, timing chains are becoming increasingly personalized and diversified, and their application is becoming more and more widespread. Currently, most newly developed engine timing chain systems use silent toothed chains. However, these chains typically involve contact between the chain plates (steel) and guide plates (plastic parts), resulting in a high coefficient of friction and significant energy loss, which is detrimental to the long-term operation of the entire system. Therefore, improving the wear resistance of engine system timing chains has become a technical problem that needs further resolution. Utility Model Content
[0003] This invention discloses a timing roller chain for an engine system, with the aim of improving the wear resistance of the timing chain in the engine system.
[0004] To achieve the above objectives, the technical solution of this utility model is as follows:
[0005] An engine system timing roller chain includes a roller chain body, the roller chain body comprising inner and outer sections that are alternately connected, the inner section being configured with a slotted sleeve with directional assembly, and the top outer surface of the inner section being used to contact a guide rail and having a wear-resistant component embedded therein.
[0006] Preferably, the inner single section includes an inner chain plate arranged opposite to each other, the inner chain plate having two first connecting holes, the two opposite first connecting holes respectively having an interference fit with the end of the slotted sleeve, and a roller being fitted with the slotted sleeve with a clearance; the slot of the slotted sleeve faces the guide rail side, and an oil hole is provided on the side wall of the slotted sleeve.
[0007] Preferably, both ends of the slotted sleeve protrude outside the inner chain plate, and the oil hole and the gap are spaced 90° apart about the axis of the slotted sleeve.
[0008] Preferably, the outer single section includes two oppositely arranged outer chain plates and a pin. The outer chain plate is provided with two second connecting holes. The opposite second connecting holes are respectively interference-fitted with the ends of the pins. The pins pass through the slotted sleeves of the adjacent inner single sections and are clearance-fitted with the slotted sleeves.
[0009] Preferably, the outer chain plate has an 8-shaped chain plate structure, the bottom of the inner chain plate has an inwardly concave first arc, the top has an elliptical through groove, a wear-resistant part is embedded in the through groove, the top of the wear-resistant part is an upwardly convex second arc, and the two ends of the second arc smoothly transition to the two sides of the top of the inner chain plate.
[0010] Preferably, the wear-resistant part is made of plastic material and is embedded in the top of the inner chain plate to form a plastic insert. The top of the plastic insert is used to contact the guide rail.
[0011] Preferably, the height of the outer chain plate is lower than the height of the inner chain plate, and the top of the outer chain plate is detached from the guide rail surface.
[0012] Preferably, the pitch between adjacent inner and outer chain plates is 6.35-12.70 mm; the clearance between the end of the slotted sleeve and the first connecting hole is 0.04-0.06 mm; and the protrusion of the slotted sleeve is ≤0.04 mm.
[0013] Preferably, the thickness of the outer chain plate is less than the thickness of the inner chain plate.
[0014] Preferably, the slotted sleeve is cryogenically treated; the roller is cold-forged and undergoes cryogenic heat treatment.
[0015] The advantages of this new type of timing roller chain for engine systems are as follows:
[0016] This new design combines the inner chain plate body with a plastic insert, achieving plastic-to-plastic contact with the guide rail, reducing friction and achieving low-friction and lightweight effects. The slotted sleeve is oriented for assembly, and the oil holes effectively avoid gaps, preventing impact between gaps and rollers that could cause the sleeve to break. The oil holes in the sleeve facilitate the formation of oil films on the inner wall of the sleeve and the surface of the pin. The slotted sleeve and rollers undergo the same cryogenic treatment to increase surface hardness and effectively improve wear resistance. Attached Figure Description
[0017] Figure 1 A front view schematic diagram of the structure of this novel invention.
[0018] Figure 2 A top view schematic diagram of the structure of this novel invention.
[0019] Figure 3 A front view structural diagram of the novel inner chain plate.
[0020] Figure 4 A schematic diagram of the structure of this novel inner single section.
[0021] Figure 5 A three-dimensional structural diagram of the novel inner chain plate.
[0022] 1. Pin; 2. Outer link plate; 3. Inner link plate; 4. Slotted sleeve; 5. Roller; 6. Oil hole; 7. Plastic insert. Detailed Implementation
[0023] 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.
[0024] 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.
[0025] Example 1
[0026] A timing roller chain for an engine system, such as Figure 1-5 As shown, it includes a roller chain body, which includes inner and outer sections that are alternately connected. The inner section is equipped with a slotted sleeve 4 that is oriented and assembled. The top outer surface of the inner section is used to contact the guide rail (a common engine timing chain system structure, not shown in the figure) and is fitted with wear-resistant parts.
[0027] Example 2
[0028] like Figure 1 , 2 As shown in Figure 4, the inner single section includes an inner chain plate 3 arranged opposite to each other. The inner chain plate 3 is provided with two first connecting holes. The two opposite first connecting holes are respectively interference-fitted with the end of the slotted sleeve 4. A roller 5 is fitted with the outside of the slotted sleeve 4 with clearance.
[0029] like Figure 1 As shown, the slot of the slotted sleeve 4 faces the guide rail side to prevent the rollers from contacting the slot during chain operation. An oil hole 6 is provided on the side wall of the slotted sleeve.
[0030] like Figure 2 As shown, both ends of the slotted sleeve 4 protrude outside the inner chain plate 3, and the oil hole 6 and the gap are spaced 90° apart about the axis of the slotted sleeve 4.
[0031] like Figure 1 , 2 As shown, the outer single section includes two oppositely arranged outer chain plates 2 and a pin 1. The outer chain plate 2 is provided with two second connecting holes. The opposite second connecting holes are respectively interference-fitted with the ends of the pin 1. The pin 1 passes through the slotted sleeve 4 of the adjacent inner single section and is clearance-fitted with the slotted sleeve 4.
[0032] Example 3
[0033] like Figure 1-5As shown, the outer chain plate 2 has an 8-shaped chain plate structure, the bottom of the inner chain plate 3 is provided with an inwardly concave first arc, and the top is provided with an elliptical through groove. A wear-resistant part is embedded in the through groove. The top of the wear-resistant part is an upwardly convex second arc, and the two ends of the second arc smoothly transition to the two sides of the top of the inner chain plate 3.
[0034] like Figure 5 As shown, the wear-resistant part is made of plastic material and is embedded in the top of the inner chain plate 3 to form a plastic insert 7. The top of the plastic insert 7 is used to contact the guide rail.
[0035] like Figure 1 As shown, the height of the outer chain plate 2 is lower than the height of the inner chain plate 3, and the top of the outer chain plate 2 is detached from the guide rail surface to avoid contact between the outer chain plate and the guide rail and reduce friction.
[0036] Example 4
[0037] like Figure 1 , 2 As shown, the pitch between adjacent inner and outer chain plates is 6.35 mm.
[0038] like Figure 1 , 2 As shown, the gap between the end of the slotted sleeve and the first connecting hole is 0.04 mm.
[0039] like Figure 1 , 2 As shown, the exposed portion of the slotted sleeve is 0.04 mm.
[0040] Example 5
[0041] like Figure 1 , 2 As shown, the pitch between adjacent inner and outer chain plates is 12.70 mm.
[0042] like Figure 1 , 2 As shown, the gap between the end of the slotted sleeve and the first connecting hole is 0.06 mm.
[0043] like Figure 1 , 2 As shown, the exposed portion of the slotted sleeve is 0 mm.
[0044] Example 6
[0045] like Figure 1-5 As shown, the thickness of the outer chain plate 2 is less than the thickness of the inner chain plate 3, which ensures the strength of the chain while reducing its weight.
[0046] Example 7
[0047] like Figure 1-5 As shown, the slotted sleeve is subjected to cryogenic treatment.
[0048] like Figure 1-5 As shown, the roller is formed by cold heading and heat treatment is performed by cryogenic treatment.
Claims
1. A timing roller chain for an engine system, comprising a roller chain body, said roller chain body comprising inner and outer segments alternately connected to each other, characterized in that: The inner section is equipped with a slotted sleeve with directional assembly, and the top outer surface of the inner section is used to contact the guide rail and is fitted with wear-resistant parts.
2. The timing roller chain for an engine system as described in claim 1, characterized in that: The inner single section includes an inner chain plate arranged opposite to each other. The inner chain plate has two first connecting holes. The two opposite first connecting holes are respectively interference-fitted with the end of the slotted sleeve. Rollers are fitted with the slotted sleeve with clearance. The slot of the slotted sleeve faces the guide rail side. Oil holes are provided on the side wall of the slotted sleeve.
3. The timing roller chain for an engine system as described in claim 2, characterized in that: Both ends of the slotted sleeve protrude from the inner chain plate, and the oil hole and the gap are spaced 90° apart about the axis of the slotted sleeve.
4. The timing roller chain for an engine system as described in claim 3, characterized in that: The outer single section includes two oppositely arranged outer chain plates and a pin. The outer chain plates are provided with two second connecting holes. The opposite second connecting holes are respectively interference-fitted with the ends of the pins. The pins pass through the slotted sleeves of the adjacent inner single sections and are clearance-fitted with the slotted sleeves.
5. The timing roller chain for an engine system as described in claim 4, characterized in that: The outer chain plate has an 8-shaped chain plate structure. The bottom of the inner chain plate has a first concave arc and the top has an elliptical through groove. A wear-resistant part is embedded in the through groove. The top of the wear-resistant part is a second convex arc. The two ends of the second arc smoothly transition to the two sides of the top of the inner chain plate.
6. The timing roller chain for an engine system as described in claim 5, characterized in that: The wear-resistant part is made of plastic material and is embedded in the top of the inner chain plate to form a plastic insert. The top of the plastic insert is used to contact the guide rail.
7. The timing roller chain for an engine system as described in claim 6, characterized in that: The height of the outer chain plate is lower than that of the inner chain plate, and the top of the outer chain plate is detached from the guide rail surface.
8. The timing roller chain for an engine system as described in claim 7, characterized in that: The pitch between adjacent inner and outer chain plates is 6.35-12.70 mm; the clearance between the end of the slotted sleeve and the first connecting hole is 0.04-0.06 mm; and the protrusion of the slotted sleeve is ≤0.04 mm.
9. The timing roller chain for an engine system as described in claim 8, characterized in that: The thickness of the outer chain plate is less than the thickness of the inner chain plate.
10. The timing roller chain for an engine system as described in claim 9, characterized in that: The slotted sleeve is cryogenically treated; the roller is cold-forged and cryogenically treated for heat treatment.