Oil chain sealing and lubricating structure

Abstract

The utility model relates to an oil chain sealing and lubricating structure which comprises a chain joint and a chain sheet and is provided with an installation channel penetrating in the axial direction. The chain pin is rotatably arranged in the mounting channel in a penetrating mode, and the two ends of the chain pin extend out of the axial end face of the chain joint; the oil injection channels are arranged at the two ends of the chain pin, and each oil injection channel is internally provided with an openable port; the spiral oil guide groove is formed in the radial inner side of the chain joint, and oil storage cavities are further formed in the two end faces of the chain joint; the oil guide channel is communicated with the oil injection channel and the spiral oil guide groove; the sealing assembly is arranged at the open end of the chain and comprises a wear-resistant gasket and a sealing ring; wherein the cavity wall of the oil storage cavity is provided with an oil guide inclined surface which is gradually shrunk towards the chain pin, by arranging the L-shaped wear-resistant gasket, multi-point sealing is achieved, the oil leakage probability is reduced, by injecting high-concentration grease to be matched with the oil storage cavity formed in the radial inner side of the chain way, secondary sealing is achieved, and by arranging the oil guide inclined surface, lubricating oil can be conveniently guided into the oil storage cavity for lubrication; uniform oil guiding is achieved, and the lubricating effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of transmission chain technology, and in particular to an oil chain sealing and lubrication structure. Background Technology

[0002] Tracked machinery, including excavators, bulldozers, drilling rigs, pavers, and other tracked vehicles, as well as conveyor belts, is widely used. However, the chain links and chain pins, as key components of tracked machinery, are prone to damage due to the heavy loads and friction they bear, especially in construction machinery chassis where the working environment is harsh and the loads are high. These components often require maintenance and replacement after a certain period of use. To reduce friction and extend the lifespan of the chain links and chain pins, existing technology involves creating an oil injection hole with a plug on the end face of the chain pin. The chain link extends into an oil guide hole in the gap between the chain pin and the chain link. Lubricating oil is injected into the injection hole, forming a closed oil reservoir within the gap between the chain pin and the chain link, along with the chain links, sealing rings, and the plug. During operation, an oil film forms, reducing friction and thus extending the lifespan.

[0003] However, the sealing effect of the lubricating oil is poor during the movement of the track, which can cause oil leakage. In addition, the oil guiding effect of the injected lubricating oil is not good, which can easily cause uneven oil guiding and affect the lubrication effect. Utility Model Content

[0004] To overcome the technical defects of the existing technology, this utility model provides an oil chain sealing lubrication structure.

[0005] The technical solution adopted in this utility model includes:

[0006] Chain links and chain pieces have an axially continuous mounting channel;

[0007] A chain pin is rotatably inserted into the mounting channel, with both ends of the chain pin extending beyond the axial end face of the chain passage. Oil injection channels are provided at both ends of the chain pin, and each oil injection channel has an openable and closable port.

[0008] A spiral oil guide groove is formed on the radial inner side of the chain passage, and oil storage cavities are also provided on the two end faces of the chain passage;

[0009] An oil guide channel connecting the oil injection channel and the spiral oil guide groove;

[0010] as well as

[0011] The sealing assembly provided at the open end of the chain passage includes a wear-resistant gasket and a sealing ring;

[0012] The oil storage cavity wall is provided with an oil guide slope that tapers toward the chain pin.

[0013] Preferably, the two oil injection channels are isolated from each other.

[0014] Preferably, the cross-sectional shape of the oil storage cavity is semi-circular.

[0015] Preferably, the port has an internal thread structure and is configured to detachably connect to an oiling tool or a threaded plug.

[0016] Preferably, the inclination angle α of the oil guide slope satisfies 15°≤α≤45°.

[0017] Preferably, the gap E between the chain link and the chain pin is greater than the gap F between the two chain pieces.

[0018] Preferably, the oil storage chamber is filled with high-concentration grease.

[0019] Preferably, the high-concentration fat is heat-resistant butter.

[0020] Preferably, the wear-resistant pad is L-shaped.

[0021] The beneficial effects of this utility model are: by setting an L-shaped wear-resistant gasket, multi-point sealing is achieved, reducing the probability of oil leakage; by injecting high-concentration grease to form an oil storage cavity on the radial inner side of the chain, secondary sealing is achieved; and by setting an oil guide slope, lubricating oil is easily introduced for lubrication, achieving uniform oil guidance and improving the lubrication effect. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the overall structure of this utility model.

[0023] Figure 2 This is a schematic diagram of the structure of the chain in this utility model.

[0024] Figure 3 This is a cross-sectional view of the oil guide groove of the present invention.

[0025] Figure 4 This is a schematic diagram of the oil storage cavity of this utility model.

[0026] Figure 5 This is an enlarged schematic diagram of the inclined surface of the oil guide of this utility model when the inclination angle α is 15°.

[0027] Figure 6 This is an enlarged schematic diagram of the inclined surface of the oil guide of this utility model when the inclination angle α is 30°.

[0028] Figure 7 This is an enlarged schematic diagram of the inclined surface of the oil guide of this utility model when the inclination angle α is 45°.

[0029] Figure 8This is an enlarged schematic diagram of the inclined surface of the oil guide of this utility model when the inclination angle α is 50°.

[0030] Figure 9 This is an enlarged schematic diagram of the inclined surface of the oil guide of this utility model when the inclination angle α is 10°.

[0031] Figure label explanation: In the figure:

[0032] 100. Chain guide; 101. Wear-resistant gasket; 102. Sealing ring; 103. Oil reservoir; 104. Oil guide slope; 105. Spiral oil guide groove;

[0033] 200. Chain link;

[0034] 300, Chain pin; 301, Oil injection channel; 302, Port; 303, Threaded plug; 304, Oil guide channel. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings:

[0036] like Figures 1-5 As shown, this embodiment provides an oil chain sealing lubrication structure, including:

[0037] Chain 100 and chain 200 have an axially continuous mounting channel;

[0038] The chain pin 300 is rotatably inserted into the mounting channel to facilitate the assembly of the chain link 100, chain piece 200 and chain pin 300. The two ends of the chain pin 300 extend beyond the axial end face of the chain link 100. Oil injection channels 301 are provided at both ends of the chain pin 300. Each oil injection channel 301 has an openable and closable port 302. Machine oil or gear oil is injected through the oil injection channel 301, and the threaded plug 303 is tightened through the internal thread structure of the port 302 to prevent lubricating oil leakage.

[0039] A spiral oil guide groove 105 is formed on the radial inner side of the chain passage 100. The two end faces of the chain passage 100 are also provided with oil storage cavities 103, which connect the oil injection channel 301 and the oil guide channel 304 of the spiral oil guide groove 105. The lubricating oil injected through the oil injection channel 301 at one end enters the gap between the chain passage 100 and the chain pin 300 through the oil guide channel 304 in sequence, and then is evenly distributed in the closed space formed by the chain passage 100 and the chain pin 300 through the spiral oil guide groove 105 to achieve a lubrication effect.

[0040] as well as

[0041] The sealing assembly disposed at the open end of the chain passage 100 includes a wear-resistant gasket 101 and a sealing ring 102. The wall of the oil storage cavity 103 is provided with an oil guiding slope 104 that tapers toward the chain pin 300. The wear-resistant gasket 101 is preferably L-shaped. Due to the L-shaped design of the wear-resistant gasket, in conjunction with the use of the sealing ring 102, compared with the prior art, a sealing point can be formed between the left side of the sealing ring 102 and the inner wall of the chain pin 300, and between the upper end of the sealing ring 102 and the inner wall of the chain piece 200, respectively, to prevent lubricating oil leakage and achieve a better sealing effect. The design of the oil guiding slope 104 increases the contact surface of the lubricating oil, thus making it easier for the lubricating oil to be introduced.

[0042] The two oil injection channels 301 are isolated from each other. The cross-sectional shape of the oil storage cavity 103 is semi-circular. When in use, high-concentration grease is injected into the oil storage cavity 103, so that an oil film is generated at the interface between the wear-resistant gasket 101 and the chain 100, preventing lubricating oil from seeping out through the oil guide slope 104 and achieving secondary sealing.

[0043] The port 302 is provided with an internal thread structure and is configured to detachably connect to an oiling tool or a threaded plug 303. During oiling, lubricating oil is injected into the port 302. After the injection is completed, the threaded plug 303 is used to seal the lubricating oil. The thread structure provides a better sealing effect and prevents oil leakage.

[0044] The gap E between the chain passage 100 and the chain pin 300 is greater than the gap F between the two chain pieces 200, which is used to protect the L-shaped wear-resistant pad 101 from being damaged by hard impacts and pressure.

[0045] The oil storage chamber 103 is filled with high-concentration grease, preferably heat-resistant butter, which can achieve a better sealing effect due to its high concentration.

[0046] To verify that the best sealing and oil guiding effect is achieved when the inclination angle α of the oil guiding slope satisfies 15°≤α≤45°, the following experimental procedure was performed:

[0047] like Figure 5 As shown, the inclination angle α of the oil guide slope 104 is 15°. The chain drive test platform is equipped with a constant working condition of 800 rpm and 15 kN load to test the technical effect at different angles α.

[0048] Angle α (°) Lubricant retention rate 200h Chain link temperature rise ΔT / ℃ Wear amount (mg / m) 15 85％ 29.2 8.3

[0049] like Figure 6 As shown, the inclination angle α of the oil guide slope 104 is 30°. The chain drive test platform is equipped with a constant working condition of 800 rpm and 15 kN load to test the technical effect under different angles α.

[0050] Angle α (°) Lubricant retention rate 200h Chain link temperature rise ΔT / ℃ Wear amount (mg / m) 30 91％ 26.8 5.1

[0051] like Figure 7 As shown, the inclination angle α of the oil guide slope 104 is 45°. The chain drive test platform is equipped with a constant working condition of 800 rpm and 15 kN load to test the technical effect under different angles α.

[0052] Angle α (°) Lubricant retention rate 200h Chain link temperature rise ΔT / ℃ Wear amount (mg / m) 45 82％ 31.4 7.9

[0053] like Figure 8 As shown, the inclination angle α of the oil guide slope 104 is 10°. The chain drive test platform is equipped with a constant working condition of 800 rpm and 15 kN load to test the technical effect under different angles α.

[0054] Angle α (°) Lubricant retention rate 200h Chain link temperature rise ΔT / ℃ Wear amount (mg / m) 10 62％ 38.5 12.7

[0055] like Figure 9 As shown, the inclination angle α of the oil guide slope 104 is 50°. The chain drive test platform is equipped with a constant working condition of 800 rpm and 15 kN load to test the technical effect under different angles α.

[0056] Angle α (°) Lubricant retention rate 200h Chain link temperature rise ΔT / ℃ Wear amount (mg / m) 50 68％ 37.1 11.2

[0057] The above experimental results indicate that:

[0058] When α = 15°-45°, the lubricant retention rate is consistently above 80%, and the wear rate is below 8.5 mg / m. In particular, when α = 25°-35°, the flow velocity of the lubricant on the inclined plane is stable at 0.8-1.2 m / s, forming an optimal oil film thickness of 0.05-0.12 mm.

[0059] In practical use, lubricating oil injected into one end of the oil injection channel 301 through an oil injection tool enters the gap between the chain link 100 and the chain pin 300 through the oil guide channel 304, and then is evenly distributed in the closed space formed by the chain link 100 and the chain pin 300 through the spiral oil guide groove 105 to achieve a lubrication effect. Due to the L-shaped design of the wear-resistant gasket, in conjunction with the use of the sealing ring 102, compared with the existing technology, the left side of the sealing ring 102 can be flush with the inner wall of the chain pin 300, and the upper end of the sealing ring 102 can be flush with the chain link 2. Each inner wall of the 00 forms a sealing point to prevent lubricating oil leakage and achieve a good sealing effect. The design of the oil guide slope 104 increases the contact surface of the lubricating oil, thus making it easier to introduce the lubricating oil and improving the lubrication effect. The cross-sectional shape of the oil storage cavity 103 is semi-circular. When in use, high-concentration grease is injected into the oil storage cavity 103, so that an oil film is generated at the interface between the wear-resistant gasket 101 and the chain 100, preventing the lubricating oil from seeping out through the oil guide slope 104, achieving secondary sealing and thus improving the sealing effect.

[0060] The foregoing has shown and described the basic principles and main features of this invention, as well as its advantages. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope. All such changes and modifications fall within the scope of this invention as defined by the appended claims and their equivalents.

Claims

1. An oil chain sealing lubrication structure, characterized in that, include: Chain link (100) and chain piece (200) have an axially continuous mounting channel; A chain pin (300) is rotatably inserted into the mounting channel, with both ends of the chain pin (300) extending beyond the axial end face of the chain passage (100); Oil injection channels (301) are provided at both ends of the chain pin (300), and each oil injection channel (301) has an openable and closable port (302). A spiral oil guide groove (105) is formed on the radial inner side of the chain (100), and oil storage cavities (103) are also provided on the two end faces of the chain (100). An oil guide channel (304) connecting the oil injection channel (301) and the spiral oil guide groove (105). as well as The sealing assembly provided at the opening end of the chain (100) includes a wear-resistant gasket (101) and a sealing ring (102). The oil storage cavity (103) has an oil guide slope (104) that tapers toward the chain pin (300) on its cavity wall.

2. The oil chain sealing lubrication structure according to claim 1, characterized in that: The two oil injection channels (301) are isolated from each other.

3. The oil chain sealing lubrication structure according to claim 1, characterized in that: The cross-sectional shape of the oil storage cavity (103) is semi-circular.

4. The oil chain sealing lubrication structure according to claim 1, characterized in that: The port (302) is provided with an internal thread structure and is configured to detachably connect to an oiling tool or a threaded plug (303).

5. The oil chain sealing lubrication structure according to claim 1, characterized in that: The inclination angle α of the oil guide slope (104) satisfies 15°≤α≤45°.

6. The oil chain sealing lubrication structure according to claim 1, characterized in that: The gap E between the chain link (100) and the chain pin (300) is greater than the gap F between the two chain pieces (200).

7. The oil chain sealing lubrication structure according to claim 4, characterized in that: The oil storage chamber (103) is filled with high-concentration grease.

8. The oil chain sealing lubrication structure according to claim 7, characterized in that: The high-concentration fat is heat-resistant butter.

9. The oil chain sealing lubrication structure according to claim 1, characterized in that: The wear-resistant pad is L-shaped.

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