Speed change type chain

Abstract

The utility model provides a speed change type chain, and relates to the technical field of chains. The speed change type chain comprises a chain body, the chain body is formed by connecting a plurality of chain link units in series, each chain link unit comprises two inner chain links, an outer chain link is arranged on the outer side face of each inner chain link, two connecting chain shafts penetrate through the interiors of the two inner chain links, the outer chain links are connected to one ends of the connecting chain shafts in a sleeved mode, and the outer chain links are connected to the other ends of the connecting chain shafts in a sleeved mode. And the interior of the connecting chain shaft is hollow. According to the device, the chain body is installed on the gear disc, the side face, provided with the oil blocking strip, of the connecting chain shaft faces the gear disc, and when each chain link unit on the chain body is transmitted to the gear disc, the oil blocking strip is extruded through the gear disc and pushed to move towards the interior of the connecting chain shaft; the oil leakage groove is opened to enable lubricating oil stored in the connecting chain shaft to flow out, the gear disc and the chain are coated with the lubricating oil, the automatic lubricating effect is achieved, the transmission smoothness of the chain body is improved, and the service life of the chain body is prolonged.

Description

Technical Field

[0001] The utility model relates to a chain, in particular to a variable-speed chain, belonging to the technical field of chains. Background Art

[0002] A chain is generally a metal link or ring, mostly used for mechanical transmission and traction, a chain-shaped object used to block traffic channels (such as in streets, rivers or harbor entrances), a chain for mechanical transmission. The advantages of chain drive include simple structure, convenient manufacturing, stable transmission ratio, high transmission efficiency, high strength of the chain, able to bear large loads, high precision, able to ensure stable transmission, long service life, low maintenance cost. In addition, the cost of chain drive is low, suitable for working in high-temperature environments and dusty environments. A variable-speed chain is a chain that can be used on a variable-speed wheel, especially for some large machinery.

[0003] Chinese Patent Publication No. CN201262211Y discloses a variable-speed chain, which includes a ring body formed by connecting multiple chain units with chain pins. Each chain unit has two relatively arranged inner link plates, and chain rollers and chain pins are combined at the ends of the two inner link plates to pivotally connect two relatively arranged outer link plates. Concave oblique cutting parts are formed on the inner surfaces of the middle sections of the two relatively arranged outer / inner link plates, and the oblique cutting parts of the two relatively arranged outer / inner link plates are in opposite obliquities. With this design, the space is appropriately increased by forming oblique cutting parts at the gear engagement spaces between the relatively arranged outer link plates and between the relatively arranged inner link plates, so that when the variable-speed chain changes positions between sprockets, the teeth of the sprockets can be easily engaged, and interference and obstruction during speed change can be reduced.

[0004] However, the inventor believes that there are certain defects in the above device. After long-term use of the above device, the lubricity between the chain and the gear disc decreases. If lubricating oil cannot be coated in time, the wear between the components of the chain is accelerated, reducing the service life of the chain. Therefore, we provide a variable-speed chain to solve the above problems. Content of the Utility Model

[0005] To solve the above problems, the utility model provides a direct-lifting quartz boat fork to solve the above problems. The specific technical solution is as follows:

[0006] A variable-speed chain includes a chain body, the chain body is formed by connecting multiple link units in series. Each link unit includes two inner links, and an outer link is arranged on the outer side of each inner link. Two connecting chain shafts penetrate through the interiors of the two inner links. The outer link is sleeved on one end of the connecting chain shaft. The interior of the connecting chain shaft is hollow, and lubricating oil is filled in the interior of the connecting chain shaft. An oil leakage groove is formed on the connecting chain shaft, and an oil blocking strip for blocking the oil leakage groove is inserted into the interior of the oil leakage groove.

[0007] Preferably, the oil blocking strip is cylindrical, and the diameter value of the oil blocking strip is equal to the minimum width value of the oil leakage groove. When the oil blocking strip is squeezed and rises, the oil leakage groove is opened to allow the lubricating oil inside the connecting chain shaft to flow out.

[0008] Preferably, a fixing plate is fixedly connected inside the connecting chain shaft, and the oil blocking strip and the fixing plate are connected by a return spring. When the oil blocking strip is not stressed, the return spring rebounds to quickly drive the oil blocking strip to block the oil leakage groove.

[0009] Preferably, an oil injection hole is opened at one end of the connecting chain shaft, and an oil blocking nozzle is threadedly connected inside the oil injection hole. By rotating the oil blocking nozzle, the oil blocking nozzle is removed from one end of the connecting chain shaft to open the oil injection hole, and lubricating oil is filled into the connecting chain shaft.

[0010] Preferably, a slotted screwdriver groove is opened at the top of the oil blocking nozzle, which facilitates removing the oil blocking nozzle from one end of the connecting chain shaft under the action of the slotted screwdriver groove.

[0011] Preferably, an oil storage cavity is opened inside the outer chain link, and a sponge block is fixedly connected to one side surface of the outer chain link. One end of the sponge block is arranged inside the oil storage cavity, and the oil storage cavity soaks the sponge block. Finally, the gear disc is coated with lubricating oil through the sponge block with lubricating oil.

[0012] Preferably, an oil filling hole communicating with the oil storage cavity is opened on the outer chain link, and a plug is threadedly connected inside the oil filling hole. By opening the plug, lubricating oil is added into the oil storage cavity through the oil filling hole.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The variable-speed chain installs the chain body on the gear disc, and the side surface of the connecting chain shaft provided with the oil blocking strip faces the gear disc. When each link unit on the chain body is transmitted to the gear disc, the gear disc squeezes the oil blocking strip and pushes it to move inside the connecting chain shaft, opening the oil leakage groove to allow the lubricating oil stored inside the connecting chain shaft to flow out, coating the gear disc and the chain to play an automatic lubrication role, improving the smoothness of the transmission of the chain body, and extending the service life of the chain body.

[0015] 2. The variable-speed chain, under the action of the provided fixing plate and return spring, when each link unit is away from the gear disc, the return spring rebounds to drive the oil blocking strip to reset to re-block the oil leakage groove, avoiding excessive waste of lubricating oil leakage.

[0016] 3. The variable-speed chain, through the provided oil storage cavity and sponge block, can coat the gear disc during the transmission process with lubricating oil, further ensuring the normal use of the chain. Description of the Drawings

[0017] Figure 1 is the overall three-dimensional view of the present utility model;

[0018] Figure 2 is the three-dimensional view of the link unit of the present utility model;

[0019] Figure 3 is the schematic internal structure diagram of the connecting chain shaft of the present utility model;

[0020] Figure 4 is the schematic structure diagram of the oil storage cavity of the present utility model.

[0021] Description of the drawings: 1. Chain body; 2. Outer link; 21. Oil storage cavity; 3. Inner link; 4. Connecting chain shaft; 41. Oil leakage groove; 5. Oil blocking strip; 51. Fixed plate; 52. Return spring; 6. Oil blocking nozzle; 7. Sponge block; 8. Plug. Detailed implementation manners

[0022] The present utility model will be further described below in conjunction with the drawings.

[0023] Please refer to Figure 1 , Figure 2 and Figure 3 , a variable-speed type chain, including a chain body 1. The chain body 1 is formed by connecting multiple link units in series. Each link unit includes two inner links 3. An outer link 2 is provided on the outer side of each inner link 3. Two connecting chain shafts 4 penetrate through the interiors of the two inner links 3. The outer link 2 is sleeved on one end of the connecting chain shaft 4. The two outer links 2, the two inner links 3 and the two connecting chain shafts 4 are combined to form a link unit, and multiple link units are connected in series to form the entire chain body 1.

[0024] Please refer to Figure 1 , Figure 2 and Figure 3 , the interior of the connecting chain shaft 4 is hollow, the interior of the connecting chain shaft 4 is filled with lubricating oil, an oil leakage groove 41 is formed on the connecting chain shaft 4, and an oil blocking strip 5 for blocking the oil leakage groove 41 is inserted into the interior of the oil leakage groove 41. The end of the connecting chain shaft 4 provided with the oil blocking strip 5 is the inner surface of the chain body 1. When the chain body 1 is installed on a gear disc, when each link unit passes through the gear disc, the gear disc squeezes the oil blocking strip 5 to push the oil blocking strip 5 to move towards the interior of the connecting chain shaft 4, so that the lubricating oil inside the connecting chain shaft 4 flows out through the oil leakage groove 41. The oil blocking strip 5 is cylindrical, and the diameter value of the oil blocking strip 5 is equal to the minimum width value of the oil leakage groove 41. The vertical cross-section of the oil leakage groove 41 is V-shaped. When the oil blocking strip 5 rises, a gap is generated between the oil leakage groove 41 and the oil blocking strip 5, and the lubricating oil flows out through the gap.

[0025] Please refer to Figure 1 , Figure 2 and Figure 3The interior of the chain shaft 4 is fixedly connected with a fixing plate 51, and the oil blocking strip 5 and the fixing plate 51 are connected by a return spring 52. When each chain link unit is away from the gear plate, the return spring 52 pushes the oil blocking strip 5 to reset and re-block the oil leakage groove 41 to prevent the lubricating oil from flowing out.

[0026] See also Figure 1 , Figure 2 and Figure 3 An oil filling hole is provided at one end of the connecting chain shaft 4, and an oil plug 6 is connected to the internal thread of the oil filling hole. A slot is provided on the top of the oil plug 6. The oil plug 6 is removed from one end of the connecting chain shaft 4 by a screwdriver, and lubricating oil is filled into the interior of the connecting chain shaft 4 through the oil filling hole.

[0027] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 An oil storage chamber 21 is provided inside the outer chain link 2, a sponge block 7 is fixedly connected to one side of the outer chain link 2, one end of the sponge block 7 is arranged inside the oil storage chamber 21, the sponge block 7 is soaked with the lubricating oil inside the oil storage chamber 21, and finally the gear plate is coated with lubricating oil through the sponge block 7 with lubricating oil, an oil filling hole connected to the oil storage chamber 21 is provided on the outer chain link 2, and a plug 8 is connected to the internal thread of the oil filling hole. The plug 8 is removed by a screwdriver to facilitate oil filling into the oil storage chamber 21.

[0028] When the utility model is in use: the chain body 1 makes each chain link unit pass through the gear plate during the transmission process. When the chain link unit passes through the gear plate, the gear plate squeezes the oil blocking strip 5 on the chain link unit connecting the chain shaft 4, and pushes the oil blocking strip 5 to move to the inside of the connecting chain shaft 4, so that a certain gap is generated between the oil blocking strip 5 and the oil leakage groove 41, and the lubricating oil inside the connecting chain shaft 4 flows out through the gap to automatically lubricate the chain body 1 and the gear plate. When the chain link unit is away from the gear plate, the rebound of the reset spring 52 drives the oil blocking strip 5 to quickly reset to block the oil leakage groove 41, the sponge block 7 is soaked with the lubricating oil inside the oil storage chamber 21, and the gear plate is coated with lubricating oil through the sponge block 7 with lubricating oil, the oil plugging nozzle 6 is removed from one end of the connecting chain shaft 4 through a bolt cutter to open the oil filling hole, and the lubricating oil is refilled into the inside of the connecting chain shaft 4 through the oil filling hole.

[0029] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the claims of the present invention.

Claims

1. A variable-speed chain, comprising a chain body (1), characterized in that: The chain body (1) is formed by connecting a plurality of link units in series. Each link unit includes two inner links (3). An outer link (2) is provided on the outer side of each inner link (3). Two connecting chain shafts (4) penetrate through the interiors of the two inner links (3). The outer link (2) is sleeved on one end of the connecting chain shaft (4). The interior of the connecting chain shaft (4) is in an air-like state. Lubricating oil is filled in the interior of the connecting chain shaft (4). An oil leakage groove (41) is formed in the connecting chain shaft (4). A plugging oil strip (5) for plugging the oil leakage groove (41) is inserted into the interior of the oil leakage groove (41).

2. A variable-speed chain according to claim 1, characterized in that: The plugging oil strip (5) is cylindrical, and the diameter value of the plugging oil strip (5) is equal to the minimum width value of the oil leakage groove (41).

3. A variable-speed chain according to claim 1, characterized in that: A fixing plate (51) is fixedly connected to the interior of the connecting chain shaft (4). The plugging oil strip (5) and the fixing plate (51) are connected by a return spring (52).

4. A variable-speed chain according to claim 1, characterized in that: An oil injection hole is formed in one end of the connecting chain shaft (4). An oil plug (6) is threadedly connected to the interior of the oil injection hole.

5. A variable-speed chain according to claim 4, characterized in that: A slotted screwdriver slot is formed in the top of the oil plug (6).

6. A variable-speed chain according to claim 1, characterized in that: An oil storage cavity (21) is formed in the interior of the outer link (2). A sponge block (7) is fixedly connected to one side surface of the outer link (2). One end of the sponge block (7) is arranged in the interior of the oil storage cavity (21).

7. A variable-speed chain according to claim 6, characterized in that: An oil filling hole communicating with the oil storage cavity (21) is formed in the (2). A plug (8) is threadedly connected to the interior of the oil filling hole.

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