Self-lubricating chain

Abstract

The utility model discloses a self-lubricating chain, and relates to the technical field of chains, the self-lubricating chain comprises a plurality of groups of outer connecting plates and inner connecting plates which are alternately connected through connecting pieces to form an annular structure, rollers for limiting the width of the chain are arranged between the two ends of each group of inner connecting plates, and lubricating structures are mounted on the rollers. Through cooperative arrangement of the rollers, the oil discharge holes, the oil injection holes, the sponge plugs and other structures, the sponge plugs can absorb lubricating oil while plugging the oil discharge holes, when the whole chain works, after gear teeth of a chain wheel are inserted into a gap between every two adjacent rollers, the gear teeth of the chain wheel can extrude the ends, exposed out of the oil discharge holes, of the sponge plugs, and the oil discharge holes are blocked by the sponge plugs. Lubricating oil is extruded out of the sponge plug to lubricate the attached position of the whole chain and the chain wheel, the lubricating effect is greatly improved, and the problem that the lubricating oil discharged by an existing chain structure can only lubricate the chain at the attached position of the abrasion-resistant pad, the lubricating position is limited, and the self-lubricating effect of the chain is poor is solved as much as possible.

Description

Technical Field

[0001] The present application relates to the technical field of chains, and in particular to a self-lubricating chain. Background Art

[0002] A chain is generally a metal link or ring, and is mostly used for mechanical transmission and traction, and the chain used for mechanical transmission. In order to avoid breakage of the chain during use, the chain is usually made of a high-toughness material, which results in insufficient hardness of the chain and weak wear resistance. Therefore, during the use of the chain, it is necessary to regularly lubricate the chain with lubricating oil to ensure the wear resistance effect of the chain.

[0003] The utility model patent with the publication number CN219492952U proposes a self-lubricating chain, which includes two outer connecting plates, two inner connecting plates, and a pin shaft movably penetrating between the outer connecting plates and the inner connecting plates. A roller is movably sleeved on the surface of the pin shaft between the two inner connecting plates, a first wear-resistant pad is movably sleeved on the surface of the pin shaft between the outer connecting plate and the inner connecting plate, and a second wear-resistant pad is movably sleeved on the surface of the pin shaft between the inner connecting plate and the roller; an oil storage cavity is opened in the pin shaft, an oil inlet communicating with the oil storage cavity is opened at one end of the pin shaft, and oil outlets communicating with the oil storage cavity are opened on the side walls of the pin shaft close to the first wear-resistant pad and the second wear-resistant pad.

[0004] The above-mentioned chain structure discharges the lubricating oil in the oil storage cavity through the oil outlet holes to lubricate the chain. Since the oil outlet holes are arranged at the wear-resistant pads, the discharged lubricating oil can only lubricate the chain at the position where it fits with the wear-resistant pads, and the lubricating position is limited, resulting in a poor self-lubricating effect of the chain. Utility Model Content

[0005] The purpose of the present utility model is to solve or at least alleviate the problem that the lubricating oil discharged by the existing chain structure can only lubricate the chain at the position where it fits with the wear-resistant pads, and the lubricating position is limited, resulting in a poor self-lubricating effect of the chain.

[0006] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0007] A self-lubricating chain includes a plurality of groups of outer connecting plates and inner connecting plates that are alternately connected by connectors to form a ring structure. A roller for defining the width of the chain is provided between the two ends of each group of inner connecting plates. A lubricating structure is installed on the roller. The lubricating structure includes an oil injection structure arranged on the upper surface of the roller, and also includes oil discharge holes opened on the side walls of both sides of the roller and communicating with the inner cavity of the roller. Two sponge plugs for sealing the oil discharge holes are arranged in the inner cavity of the roller, and a protrusion is formed on one side of the sponge plug close to the oil discharge hole and extends outward to the outside of the oil discharge hole.

[0008] By adopting the above technical solutions, since the sponge plug is made of sponge material, while plugging the oil drain hole, it can absorb the lubricating oil stored in the roller to one end protruding outside the oil drain hole through capillary action. The overall chain operation will drive the sprocket to rotate. When the tooth of the sprocket inserts into the gap between two adjacent rollers, the tooth of the sprocket will squeeze one end of the sponge plug exposed outside the oil drain hole, and squeeze the lubricating oil out of the sponge plug to lubricate the joint between the overall chain and the sprocket, greatly improving the lubrication effect and minimizing the problem that the lubricating oil discharged by the existing chain structure can only lubricate the chain in contact with the wear-resistant pad, with limited lubrication positions and resulting in poor self-lubrication effect of the chain.

[0009] Optionally, the connecting member includes the outer connecting plate and the connecting holes opened at the ends of the inner connecting plates. The connecting holes opened at the ends of a group of adjacent outer connecting plates and inner connecting plates are misaligned and overlapped, and a cylindrical pin is inserted into the inner cavity of the connecting hole.

[0010] By adopting the above technical solutions, the connecting holes and pins are provided to rotatably connect multiple groups of outer connecting plates and inner connecting plates, enabling the overall chain to freely rotate at the connection part of the connecting member and facilitating the user to use the chain.

[0011] Optionally, the roller is sleeved on the pin between two inner connecting plates in each group and is fixedly connected to the pin. An annular cavity for storing lubricating oil is opened inside the roller.

[0012] By adopting the above technical solutions, the roller is provided to make the two ends of the roller fit with the inner connecting plates, defining the distance between the two inner connecting plates, thereby defining the size of the overall chain. An annular cavity is opened inside the roller to store lubricating oil.

[0013] Optionally, annular reinforcing rings are embedded at the connection parts between the side walls at both ends of the roller and the pin. The reinforcing rings are sleeved on the outer surface of the pin and welded to the pin.

[0014] By adopting the above technical solutions, the reinforcing rings are provided to reinforce the connection part between the pin and the roller, minimizing the problem that the annular cavity breaks when the tooth of the sprocket squeezes the roller, resulting in lubricating oil leakage.

[0015] Optionally, the oil injection structure includes an oil injection hole opened on the upper surface of the roller and communicating with the annular cavity, and a rubber plug is embedded inside the oil injection hole.

[0016] By adopting the above technical solutions, the oil injection hole is provided to facilitate replenishing lubricating oil into the annular cavity, and the rubber plug is provided to seal the oil injection hole, minimizing the problem of lubricating oil leakage during the chain transmission process.

[0017] Optionally, the opening width of the oil drainage hole at one end of the outer side wall of the roller is greater than the opening width of the oil drainage hole at one end of the inner side wall of the roller, and an inclined surface is formed between the openings at both ends of the oil drainage hole.

[0018] By adopting the above technical solution, when the sprocket teeth are inserted into the gap between the two rollers, the teeth can cooperate with the inclined surface to squeeze the sponge plug exposed outside the roller, squeeze out the lubricating oil in the sponge plug to lubricate the sprocket and chain.

[0019] Optionally, a limiting plate fitted with the sponge plug is welded in the inner cavity of the roller on the side of the sponge plug away from the oil drain hole, and a plurality of through holes are formed on the limiting plate.

[0020] By adopting the above technical scheme, a limit plate is provided to fit the sponge plug to limit the sponge plug, so as to prevent the sponge plug from falling into the annular cavity after being squeezed and losing the sealing effect on the oil drain hole. A through hole is opened on the limit plate so that the lubricating oil can pass through the through hole and be absorbed by the sponge plug.

[0021] In summary, the beneficial effects of this application are as follows:

[0022] The present application coordinates the rollers, oil drain holes, oil filling holes and sponge plugs. The sponge plug can absorb lubricating oil while sealing the oil drain hole. When the overall chain is working, after the sprocket teeth are inserted into the gap between two adjacent rollers, the sprocket teeth will squeeze the end of the sponge plug exposed outside the oil drain hole, and the lubricating oil will be squeezed out of the sponge plug to lubricate the joint between the overall chain and the sprocket, thereby greatly improving the lubrication effect and avoiding as much as possible the problem that the lubricating oil discharged from the existing chain structure can only lubricate the chain at the joint with the wear-resistant pad, and the lubrication position is limited, resulting in poor self-lubricating effect of the chain. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall three-dimensional structure of this application;

[0024] Figure 2 It is a schematic diagram of the connection structure between the roller and the pin of the present application;

[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of the roller of the present application.

[0026] Explanation of the accompanying drawings: 1. External connecting plate; 2. Internal connecting plate; 3. Connecting hole; 4. Pin; 5. Roller; 6. Reinforcement ring; 7. Oil filling hole; 8. Rubber plug; 9. Oil drain hole; 10. Inclined surface; 11. Limiting plate; 12. Through hole; 13. Sponge plug. DETAILED DESCRIPTION

[0027] The following is combined withFigures 1-3 A further detailed description of the present application will be given.

[0028] Please refer to Figures 1-3 , a self-lubricating chain, including multiple groups of outer connecting plates 1 and inner connecting plates 2 that are alternately connected by connecting members to form an annular structure. Between the two ends of each group of inner connecting plates 2, there are rollers 5 for limiting the width of the chain, so that the outer connecting plates 1, inner connecting plates 2, connecting members, and rollers 5 together form a chain structure to drive the sprocket to rotate.

[0029] A lubricating structure is installed on the roller 5. The lubricating structure includes an oil injection structure provided on the upper surface of the roller 5. Before use, the user can pre-inject an appropriate amount of lubricating oil into the roller 5 through the oil injection structure and store it in the roller 5.

[0030] It also includes oil discharge holes 9 opened on the side walls of both sides of the roller 5 and communicating with the inner cavity of the roller 5. The oil discharge holes 9 are used to discharge the lubricating oil stored in the roller 5 to lubricate the chain and the sprocket.

[0031] In the inner cavity of the roller 5, there are two sponge plugs 13 for sealing the oil discharge holes 9. One side of the sponge plug 13 close to the oil discharge hole 9 forms a protrusion and extends outward to the outside of the oil discharge hole 9.

[0032] Since the sponge plug 13 is made of sponge material, while blocking the oil discharge hole 9, it can absorb the lubricating oil stored in the roller 5 to the end protruding outside the oil discharge hole 9 through capillary action. When the chain drives the sprocket to roll and the teeth of the sprocket are inserted into the gap between two rollers 5, the teeth of the sprocket will squeeze the end of the sponge plug 13 exposed outside the oil discharge hole 9 to squeeze out the lubricating oil to lubricate the entire chain and the sprocket, greatly improving the lubrication effect.

[0033] Refer to Figure 1 , the connecting member includes a connecting hole 3 opened at the ends of the outer connecting plate 1 and the inner connecting plate 2. The connecting holes 3 opened at the ends of adjacent groups of outer connecting plates 1 and inner connecting plates 2 are misaligned and overlapped. A pin 4 with a cylindrical structure is inserted into the inner cavity of the connecting hole 3. The connecting hole 3 and the pin 4 are provided for rotatably connecting multiple groups of outer connecting plates 1 and inner connecting plates 2, so that the entire chain can freely rotate at the connection part of the connecting member, facilitating the user to use the chain.

[0034] Refer to Figure 1 , the roller 5 is sleeved on the pin 4 between two inner connecting plates 2 in each group and is fixedly connected to the pin 4. An annular cavity for storing lubricating oil is opened inside the roller 5. The roller 5 is provided to make the two ends of the roller 5 fit with the inner connecting plate 2 to limit the distance between the two inner connecting plates 2, thereby limiting the size of the entire chain, and an annular cavity is opened in the roller 5 for storing lubricating oil.

[0035] Refer to Figure 2, at the connection between the side walls at both ends of the roller 5 and the bolt 4, a reinforcing ring 6 in a ring structure is embedded. The reinforcing ring 6 is sleeved on the outer surface of the bolt 4 and welded to the bolt 4. The reinforcing ring 6 is provided to reinforce the connection between the bolt 4 and the roller 5, and to avoid as much as possible the problem of oil leakage caused by the rupture of the annular cavity when the teeth of the sprocket squeeze the roller 5.

[0036] Refer to Figure 3 , the oil injection structure includes an oil injection hole 7 opened on the upper surface of the roller 5 and communicating with the annular cavity, and a rubber plug 8 is embedded inside the oil injection hole 7. The oil injection hole 7 is provided to facilitate the replenishment of lubricating oil into the annular cavity, and the rubber plug 8 is provided to seal the oil injection hole 7, and to avoid as much as possible the problem of oil leakage during the chain drive process.

[0037] Refer to Figure 2 , the opening width of the oil drain hole 9 at one end of the outer side wall of the roller 5 is greater than the opening width of the oil drain hole 9 at one end of the inner side wall of the roller 5, and an inclined surface 10 is formed between the two openings at both ends of the oil drain hole 9. When the teeth of the sprocket are inserted into the gap between two rollers 5, the teeth can cooperate with the inclined surface 10 to squeeze the sponge plug 13 exposed outside the roller 5, and extrude the lubricating oil in the sponge plug 13 to lubricate the sprocket and the chain.

[0038] Refer to Figure 3 , a limiting plate 11 that fits with the sponge plug 13 is welded in the inner cavity of the roller 5 on the side of the sponge plug 13 away from the oil drain hole 9, and a plurality of through holes 12 are opened on the limiting plate 11. The limiting plate 11 that fits with the sponge plug 13 is provided to limit the sponge plug 13, and to avoid as much as possible the problem that the sponge plug 13 falls into the annular cavity after being squeezed and loses the sealing effect on the oil drain hole 9. The through holes 12 are opened on the limiting plate 11 so that the lubricating oil can pass through the through holes 12 and be absorbed by the sponge plug 13.

[0039] The implementation principle of this application is as follows: Since the sponge plug 13 is made of sponge material, while sealing the oil drain hole 9, it can absorb the lubricating oil stored in the roller 5 to the end protruding outside the oil drain hole 9 through capillary action. The overall chain operation will drive the sprocket to rotate. When the teeth of the sprocket are inserted into the gap between two adjacent rollers 5, the teeth of the sprocket will squeeze the end of the sponge plug 13 exposed outside the oil drain hole 9, and extrude the lubricating oil from the sponge plug 13 to lubricate the joint between the overall chain and the sprocket, greatly improving the lubrication effect, and avoiding as much as possible the problem that the lubricating oil discharged by the existing chain structure can only lubricate the chain at the joint with the wear-resistant pad, and the lubrication position is limited, resulting in poor self-lubrication effect of the chain.

[0040] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A self-lubricating chain, comprising a plurality of groups of outer connecting plates (1) and inner connecting plates (2) alternately connected by connecting members to form a ring structure, wherein rollers (5) for limiting the width of the chain are provided between the two ends of each group of inner connecting plates (2), and a lubrication structure is installed on the rollers (5), characterized in that: The lubrication structure comprises an oil injection structure arranged on the upper surface of the roller (5), and also comprises an oil discharge hole (9) opened on the side walls of both sides of the roller (5) and connected to the inner cavity of the roller (5); two sponge plugs (13) for sealing the oil discharge holes (9) are arranged in the inner cavity of the roller (5); a bulge is formed on one side of the sponge plug (13) close to the oil discharge hole (9) and extends outwardly to the outside of the oil discharge hole (9).

2. A self-lubricating chain according to claim 1, characterized in that: The connecting member comprises connecting holes (3) opened at the ends of the outer connecting plate (1) and the inner connecting plate (2); the connecting holes (3) opened at the ends of adjacent groups of the outer connecting plate (1) and the inner connecting plate (2) are staggered and overlapped, and a pin (4) with a cylindrical structure is inserted into the inner cavity of the connecting hole (3).

3. A self-lubricating chain according to claim 2, characterized in that: The roller (5) is sleeved on the pin (4) between the two inner connecting plates (2) in each group and is fixedly connected to the pin (4); an annular cavity for storing lubricating oil is provided inside the roller (5).

4. A self-lubricating chain according to claim 3, characterized in that: A reinforcing ring (6) with an annular structure is embedded in the connection between the side walls at both ends of the roller (5) and the pin (4); the reinforcing ring (6) is sleeved on the outer surface of the pin (4) and welded to the pin (4).

5. A self-lubricating chain according to claim 3, characterized in that: The oil injection structure comprises an oil injection hole (7) opened on the upper surface of the roller (5) and communicating with the annular cavity, and a rubber plug (8) is embedded in the oil injection hole (7).

6. A self-lubricating chain according to claim 5, characterized in that: The opening width of the oil drain hole (9) at one end of the outer wall of the roller (5) is greater than the opening width of the oil drain hole (9) at one end of the inner wall of the roller (5), and an inclined surface (10) is formed between the openings at both ends of the oil drain hole (9).

7. A self-lubricating chain according to claim 1, characterized in that: A limiting plate (11) fitted with the sponge plug (13) is welded in the inner cavity of the roller (5) on the side of the sponge plug (13) away from the oil drain hole (9), and a plurality of through holes (12) are formed on the limiting plate (11).

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