High-strength anti-loosening special-shaped sleeve chain applied to engine transmission

Abstract

A high-strength anti-loosening special-shaped sleeve chain applied to engine transmission belongs to the technical field of chain transmission and comprises a sleeve chain body formed by alternately connecting inner chain links and outer chain links, the middle of the outer surface of a sleeve of the sleeve chain body is expanded to form a diameter expanding section, the whole sleeve is of a structure shaped like a Chinese character'zhong ', and the diameter expanding section is provided with an oil storage mechanism. The utility model discloses a high-strength anti-loosening special-shaped sleeve chain applied to engine transmission, which meets the use requirements under harsh service conditions through brand new design of inner single links (an inner chain plate and a sleeve) of the chain.

Description

Technical Field

[0001] The invention belongs to the technical field of chain transmission, and specifically relates to a high-strength anti-loosening special-shaped sleeve chain used for engine transmission. Background Art

[0002] The high-power and high-torque chain drive in the engine mainly uses the sleeve chain as the transmission medium. The sleeve of the commonly used sleeve chain is a cylindrical structure. In order to adapt to the size of the connection hole of the inner chain plate, the sleeve wall is relatively thin. However, due to the high power and torque of the engine transmission, the existing sleeve chain often fails due to the collision and breakage of the sleeve and the wear of the inner walls on both sides of the sleeve. In order to meet the needs of high-intensity use conditions of high-power and high-torque engine chain transmission, it is necessary to improve the existing sleeve chain. Utility Model Content

[0003] In view of the problems of the prior art, the present invention discloses a high-strength anti-loosening special-shaped sleeve chain used for engine transmission, which meets the use requirements under harsh service conditions by completely redesigning the single section (inner link plate + sleeve) in the chain.

[0004] To achieve the above purpose, the technical solution of this novel invention is:

[0005] A high-strength anti-loosening special-shaped sleeve chain used for engine transmission, comprising a sleeve chain body composed of inner chain links and outer chain links alternately connected, the middle part of the sleeve outer surface of the sleeve chain body is expanded to form an expanded diameter section, the sleeve as a whole is in a "Z" shape, and the expanded diameter section is provided with an oil storage mechanism.

[0006] Preferably, the sleeve chain body includes a sleeve, an inner link plate, a pin, and an outer link plate; the two inner link plates are arranged opposite to each other, and the ends of the two sleeves are respectively interference fit with the connecting holes of the oppositely arranged inner link plates to form inner chain links; the two outer link plates are arranged opposite to each other, and the two ends of the two pins are interference fit with the connecting holes of the oppositely arranged outer link plates to form outer chain links, and the pins of the outer chain links pass through the sleeves of the adjacent inner link and are clearance-fitted with the sleeves.

[0007] Preferably, the sleeve is integrally formed by powder metallurgy process, the wall thickness at both ends of the sleeve is the thickness of the inner chain plate + 0.10mm, the expanded diameter section is used to engage with the sprocket, and the wall thickness is the minimum inner width of the chain + 0.05mm.

[0008] Preferably, the cross sections at both ends of the sleeve and the connecting holes of the inner link plate are both regular polygonal structures.

[0009] Preferably, the oil storage mechanism is an annular oil channel, an oil hole, or an oil groove arranged on the surface of the expanded diameter section.

[0010] Preferably, the annular oil passage is coaxially arranged on the outer surface of the expanded diameter section, and there are one or more annular oil passages.

[0011] Preferably, there is one annular oil channel coaxially arranged in the middle of the outer surface of the expanded diameter section, the oil hole is arranged in the annular oil channel and passes through the inner surface of the sleeve, the oil hole includes oil hole one and oil hole two, and an oil groove is axially arranged on the outer surface of the expanded diameter section between oil hole one and oil hole two.

[0012] Preferably, the hole walls of the oil hole one and the oil hole two respectively form an angle of 45° with the side walls of the oil groove, and the inner diameters of the oil hole one and the oil hole two are 1.5 mm; the groove width of the oil groove is 1.5 mm, and the groove length is 1 / 4 of the sleeve length. The oil groove is located in the middle position between the oil hole one and the oil hole two, and the distance one between the upper end of the oil groove and the top of the expanded diameter section and the distance two between the lower end of the oil groove and the bottom of the expanded diameter section are the same.

[0013] Preferably, the hole walls of the oil hole 1 and the oil hole 2 are inclined toward a side away from the wall of the oil groove.

[0014] Preferably, both ends of the sleeve protrude from the inner link plate, with the exposed amount ≤0.10 mm; the chain plate hole of the inner link plate is a regular octagon, and the upper and lower ends of the regular octagon are parallel to the upper and lower ends of the inner link plate.

[0015] The beneficial effects of the high-strength anti-loosening special-shaped sleeve chain used for engine transmission are as follows:

[0016] 1. The one-piece special-shaped sleeve of the new design has a special "Z"-shaped structure. After being assembled with the inner chain plate, the dispersion fluctuation of the inner single section inner section inner width frame can be controlled within 0.05mm, reducing the risk of the sprocket teeth biting the chain plate at the inner section during the meshing process of the chain and the sprocket.

[0017] 2. The one-piece sleeve of the new design has a special "Z"-shaped structure, and the sleeve wall in the middle part is thickened to prevent it from being hit and broken by the sprocket during use, thereby increasing the service life of the sleeve.

[0018] 3. The two ends of the one-piece special-shaped sleeve of the new design and the connecting holes of the inner chain plate are both regular polygons. After being assembled into a chain by needle-type directional interference assembly, it will not loosen during use, thus overcoming the problem of "loose joints" of the frame under harsh service conditions.

[0019] 4. The surface of the one-piece special-shaped sleeve of the new design is provided with an annular oil channel, which provides an entry channel for the oil to enter the working surface and reduces the contact wear between the sleeve and the sprocket.

[0020] 5. The oil hole provided in the present invention can penetrate the interior of the sleeve, which can reduce the wear between the pin shaft and the sleeve. The oil groove provided can be used to store lubricating oil and connect the oil channel and the oil hole, and is convenient for directional assembly of the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 , schematic diagram of the overall structure of the sleeve chain - front view.

[0022] Figure 2 , schematic diagram of the overall structure of the sleeve chain - top view.

[0023] Figure 3 , (from left to right) outer link plate, inner link plate, sleeve, pin shaft - front view.

[0024] Figure 4 , (from left to right) outer link plate, inner link plate, sleeve, pin - top view

[0025] Figure 5 , schematic diagram of the design of the new integrated sleeve oil passage, oil hole and oil groove.

[0026] 1. Inner link plate; 2. Outer link plate; 3. Pin shaft; 4. Sleeve; 41. Annular oil passage; 42. Oil groove; 43. Oil hole 1; 44. Oil hole 2. DETAILED DESCRIPTION

[0027] The following description is only 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 in the scope of protection of the present invention.

[0028] The following embodiments may be understood as a part of a local structure or method that is expressed separately in the present invention, or may be understood as a combination of the embodiments to explain the connotation of a larger structure or method of the present invention.

[0029] Example 1

[0030] A high-strength anti-loosening special-shaped sleeve chain used for engine transmission, such as Figure 1-5 As shown, it includes a sleeve chain body composed of inner chain links and outer chain links connected alternately. The middle part of the outer surface of the sleeve 4 of the sleeve chain body is expanded to form an expanded diameter section. The sleeve as a whole is in a "Z" shape. The expanded diameter section is provided with an oil storage mechanism.

[0031] Example 2

[0032] like Figure 1 , 2 As shown, the sleeve chain body includes a sleeve 4, an inner link plate 1, a pin 3, and an outer link plate 2; the two inner link plates 1 are arranged opposite to each other, and the ends of the two sleeves 4 are respectively interference fit with the connecting holes of the oppositely arranged inner link plates 1 to form an inner chain link; the two outer link plates 2 are arranged opposite to each other, and the two ends of the two pins 3 are interference fit with the connecting holes of the oppositely arranged outer link plates to form an outer chain link, and the pin 3 of the outer chain link passes through the sleeve 4 of the adjacent inner chain link and is clearance fit with the sleeve 4.

[0033] Example 3

[0034] like Figure 2 , 5 As shown, the sleeve 4 is integrally formed by powder metallurgy process, the wall thickness of both ends of the sleeve 4 is the thickness of the inner link plate 1 + 0.10mm, the expanded diameter section is used to engage with the sprocket, and the wall thickness is the minimum inner width of the chain + 0.05mm.

[0035] like Figure 1 As shown, the cross sections at both ends of the sleeve 4 and the connecting holes of the inner link plate are all regular polygonal structures.

[0036] Example 4

[0037] like Figure 2 , 5 As shown, the oil storage mechanism is an annular oil passage 41, an oil hole, and an oil groove 42 arranged on the surface of the expanded diameter section.

[0038] The annular oil passage 41 is coaxially arranged on the outer surface of the expanded diameter section, and one or more annular oil passages are arranged as required. The annular oil passages are used for oil to flow through and lubricate the sleeve and the sprocket meshing surface, thereby reducing the wear contact force.

[0039] Example 5

[0040] like Figure 5 As shown, there is one annular oil passage 41 coaxially arranged in the middle of the outer surface of the expanded diameter section, the oil hole is arranged in the annular oil passage and passes through the inner surface of the sleeve 4, the oil hole includes oil hole 1 43 and oil hole 2 44, and an oil groove 42 is axially arranged on the outer surface of the expanded diameter section between oil hole 1 43 and oil hole 2 44.

[0041] Example 6

[0042] like Figure 5 As shown, the hole walls of the oil hole 1 43 and the oil hole 2 44 respectively form an angle of 45° with the side wall of the oil groove, and the inner diameters of the oil hole 1 43 and the oil hole 2 44 are 1.5 mm, which is convenient for the entry and exit of lubricating oil to lubricate and cool the inner side of the sleeve, thereby reducing the friction between the pin shaft and the sleeve; the groove width of the oil groove is 1.5 mm, and the groove length is 1 / 4 of the sleeve length. The oil groove is located in the middle of the oil hole 1 and the oil hole 2, and the distance 1 between the upper end of the oil groove and the top of the expanded diameter section and the distance 2 between the lower end of the oil groove and the bottom of the expanded diameter section are the same. The oil groove is provided to facilitate the directional assembly of the sleeve during chain assembly and the storage and entry of oil during the use of the chain.

[0043] Example 7

[0044] like Figure 5 As shown, the hole walls of the oil hole 1 43 and the oil hole 2 44 are inclined toward a side away from the wall of the oil groove 42, so as to facilitate the inflow and outflow of oil for lubrication and cooling.

[0045] Example 8

[0046] like Figure 1-3 As shown, both ends of the sleeve 4 protrude from the inner link plate 1, and the exposed amount is ≤0.10mm; the chain plate hole of the inner link plate 1 is a regular octagon, and the upper and lower ends of the regular octagon are parallel to the upper and lower ends of the inner link plate 1.

Claims

1. A high-strength anti-loosening special-shaped sleeve chain for engine transmission, comprising a sleeve chain body composed of inner chain links and outer chain links alternately connected, characterized by: The middle part of the outer surface of the sleeve of the sleeve chain body is expanded to form an expanded diameter section, and the sleeve as a whole is a "Z"-shaped structure, and the expanded diameter section is provided with an oil storage mechanism.

2. The high-strength anti-loosening special-shaped bushing chain for engine transmission as claimed in claim 1, characterized in that: The sleeve chain body includes a sleeve, an inner link plate, a pin, and an outer link plate; the two inner link plates are arranged opposite to each other, and the ends of the two sleeves are respectively interference fit with the connecting holes of the opposite inner link plates to form an inner chain link; the two outer link plates are arranged opposite to each other, and the two ends of the two pins are interference fit with the connecting holes of the opposite outer link plates to form an outer chain link; the pin of the outer chain link passes through the sleeve of the adjacent inner chain link and is clearance fit with the sleeve.

3. The high-strength anti-loosening special-shaped bushing chain used for engine transmission as claimed in claim 2, characterized in that: The sleeve is integrally formed by powder metallurgy process, the wall thickness of both ends of the sleeve is the thickness of the inner chain plate + 0.10mm, the expanded diameter section is used to mesh with the sprocket, and the wall thickness is the inner width of the smallest inner section of the chain + 0.05mm.

4. The high-strength anti-loosening special-shaped bushing chain for engine transmission as claimed in claim 3, characterized in that: The cross sections at both ends of the sleeve and the connecting holes of the inner link plate are all regular polygonal structures.

5. A high-strength anti-loosening special-shaped bushing chain for engine transmission as claimed in any one of claims 1 to 4, characterized in that: The oil storage mechanism is an annular oil passage, an oil hole and an oil groove arranged on the surface of the expanded diameter section.

6. The high-strength anti-loosening special-shaped bushing chain used for engine transmission as claimed in claim 5, characterized in that: The annular oil passage is coaxially arranged on the outer surface of the diameter expansion section, and there are one or more annular oil passages.

7. A high-strength anti-loosening special-shaped bushing chain for engine transmission as claimed in claim 6, characterized in that: There is one annular oil passage coaxially arranged in the middle of the outer surface of the expanded diameter section, the oil hole is arranged in the annular oil passage and passes through the inner surface of the sleeve, the oil hole includes oil hole one and oil hole two, and an oil groove is axially arranged on the outer surface of the expanded diameter section between oil hole one and oil hole two.

8. The high-strength anti-loosening special-shaped bushing chain for engine transmission as claimed in claim 7, characterized in that: The hole walls of the oil hole 1 and the oil hole 2 respectively form an angle of 45° with the side wall of the oil groove, and the inner diameters of the oil hole 1 and the oil hole 2 are 1.5 mm; the groove width of the oil groove is 1.5 mm, and the groove length is 1 / 4 of the sleeve length. The oil groove is located in the middle position between the oil hole 1 and the oil hole 2, and the distance 1 between the upper end of the oil groove and the top of the expansion section and the distance 2 between the lower end of the oil groove and the bottom of the expansion section are the same.

9. A high-strength anti-loosening special-shaped bushing chain for engine transmission as claimed in claim 8, characterized in that: The hole walls of the oil hole 1 and the oil hole 2 are inclined toward a side away from the wall of the oil groove.

10. A high-strength anti-loosening special-shaped bushing chain for engine transmission as claimed in claim 9, characterized in that: Both ends of the sleeve protrude from the inner link plate, with the exposed amount being ≤0.10mm; the chain plate hole of the inner link plate is a regular octagon, and the upper and lower ends of the regular octagon are parallel to the upper and lower ends of the inner link plate.

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