Transmission device of timing chain

Abstract

The utility model belongs to the technical field of chain transmission, and particularly relates to a transmission device of a timing chain, which comprises a first concave wheel shaft and a second concave wheel shaft, the outer surface of the first concave wheel shaft and the outer surface of the second concave wheel shaft are meshed with a chain, and a protection device is arranged outside the chain and comprises a side plate. And the side plates are used for sealing chain link gaps of the chain. According to the transmission device of the timing chain, the protection device is arranged outside the chain and seals the chain, a top plate in the protection device is arranged on the upper portion of the chain, so that dirt is prevented from entering the chain, abrasion to the chain and a chain wheel is reduced, one end of each side plate is hinged to the outer surface of the chain through a pin shaft, and at the moment, the side plates can run along with the chain; a sound insulation rubber mat is fixedly installed on the outer surface of one side of the side plate, the outer surface of the sound insulation rubber mat makes contact with the outer surface of the chain, and the sound insulation rubber mat can well absorb noise generated when the chain runs.

Description

Technical Field

[0001] The utility model relates to the technical field of chain drive, in particular to a transmission device for a timing chain. Background Art

[0002] The timing chain is a key component in the engine timing system, mainly used to connect the crankshaft and the camshaft of the engine to ensure their synchronous operation. The main function of the timing chain is to transmit power, ensure the coordination between the opening and closing of the valves and the movement of the piston, so as to optimize the performance of the engine. The timing chain is usually made of high-strength metal materials to withstand high loads and wear.

[0003] Chinese Patent with publication number CN209040912U discloses a transmission device for a timing chain, belonging to the technical field of engine transmission systems. It solves the problem of abnormal noise in the helical gear transmission in the existing timing transmission device. The transmission device for the timing chain includes the side wall of the engine. The upper part of the outer wall of the side wall of the engine has a first camshaft gear and a second camshaft gear horizontally spaced from the first camshaft gear. The lower part of the outer wall of the side wall of the engine has a crankshaft gear. The middle part of the outer wall of the side wall of the engine has a water pump gear. The middle part of the outer wall of the side wall of the engine has a timing idler wheel and the timing idler wheel is close to the outer side wall of the timing chain. A timing tensioner is arranged on the outer wall of the side wall of the engine between the water pump gear and the first camshaft gear. There is a radial adjustment device between the timing tensioner and the side wall of the engine.

[0004] However, when the timing chain in the above solution is in transmission, the chain is exposed outside, and dust or dirt will enter the chain, accelerating the wear of the chain. Moreover, when the chain is running, vibrations will generate noise, greatly affecting the driving experience. Therefore, a transmission device for a timing chain is proposed to solve the above-mentioned problems. Summary of the Utility Model

[0005] Based on the technical problems that the existing timing chain transmission device will be invaded by dirt and generate relatively large noise during operation, the utility model proposes a transmission device for a timing chain.

[0006] A transmission device for a timing chain proposed by the utility model includes a first camshaft and a second camshaft. A chain is meshed with the outer surfaces of the first camshaft and the second camshaft. A protection device is arranged outside the chain. The protection device includes side plates, and the side plates seal the link gaps of the chain.

[0007] Preferably, the protection device further includes a top plate. The top plate is arranged above the chain. The lower surface of the top plate is fixedly installed with the outer surface of the side plate. One end of the side plate is hinged to the outer surface of the chain through a pin shaft. The side plates are located on both sides of the chain.

[0008] Through the above technical solution, by arranging a top plate on the upper part of the chain, dirt and dust can be prevented from entering the chain. By hinging side plates on the outer surface of the chain, the side plates and the chain move synchronously, so that the protection device and the chain move synchronously, and at the same time, external objects can be effectively prevented from entering the chain area, reducing the wear and damage of the chain.

[0009] Preferably, a sound insulation rubber pad is fixedly installed on the outer surface of one side of the side plate, and the outer surface of the sound insulation rubber pad is in contact with the outer surface of the chain.

[0010] Through the above technical solution, by installing a sound insulation rubber pad on the outer surface of the side plate, the sound insulation rubber pad can well absorb the noise generated when the chain runs.

[0011] Preferably, a first support plate is hinged to the outer surface of the side plate through a pin shaft, the outer surface of the first support plate is hinged to the outer surface of the adjacent side plate through a pin shaft, a second support plate is hinged to the outer surface of the first support plate through a pin shaft, and one end of the second support plate is hinged to the outer surface of the adjacent first support plate through a pin shaft.

[0012] Through the above technical solution, by hinging the first support plate on the outer surface of the side plate and hinging the first support plate and the second support plate, the protection device can fit the chain even on the non-linear section of the chain, so that the chain will not be affected by the protection device during operation.

[0013] Preferably, a limit seat is fixedly installed on the outer surface of the first support plate, a limit cylinder is slidably inserted into the inner wall of the limit seat, and one end of the limit cylinder is fixedly installed on the outer surface of the chain.

[0014] Through the above technical solution, by installing a limit seat on the outer surface of the first support plate and slidably inserting the limit seat and the limit cylinder, the protection device will not shift during the operation of the chain, thereby improving the stability and safety of the device.

[0015] Preferably, a spring is fixedly installed on the inner surface of the limit seat, and one end of the spring is fixedly connected to one end of the limit cylinder.

[0016] Through the above technical solution, by fixedly installing a spring on the inner surface of the limit cylinder, the spring will absorb the vibration generated by the chain, making the structure more stable.

[0017] The beneficial effects of the present utility model are as follows:

[0018] By arranging the protection device outside the chain to seal the chain, the top plate in the protection device is arranged above the chain, thus preventing dirt and dust from entering the chain. The lower surface of the top plate is fixedly installed with the outer surface of the side plate. One end of the side plate is hinged to the outer surface of the chain through a pin shaft. The side plates are located on both sides of the chain. At this time, the protection device will run along with the chain, effectively blocking the intrusion of dust, dirt and other foreign objects, reducing the wear of the chain and sprocket, and prolonging the service life. A sound insulation rubber pad is fixedly installed on the outer surface of one side of the side plate, and the outer surface of the sound insulation rubber pad contacts the outer surface of the chain. The sound insulation rubber pad can well absorb the noise generated when the chain runs, solving the technical problems that the existing chain drive device will be contaminated by dirt and generate greater noise during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. is a schematic diagram of a transmission device of a timing chain proposed by the present utility model;

[0020] Figure 2 FIG. is a perspective view of the side plate structure of a transmission device of a timing chain proposed by the present utility model;

[0021] Figure 3 FIG. is a perspective view of the sound insulation rubber pad structure of a transmission device of a timing chain proposed by the present utility model;

[0022] Figure 4 FIG. is a perspective view of the limiting cylinder structure of a transmission device of a timing chain proposed by the present utility model.

[0023] In the figure: 1, the first camshaft; 2, the second camshaft; 3, the chain; 4, the side plate; 5, the top plate; 6, the sound insulation rubber pad; 7, the first support plate; 8, the second support plate; 9, the limiting seat; 10, the limiting cylinder; 11, the spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0025] Refer to Figures 1-4 , a transmission device of a timing chain 3, includes a first camshaft 1 and a second camshaft 2. The outer surfaces of the first camshaft 1 and the second camshaft 2 are engaged with a chain 3. A protection device is arranged outside the chain 3. The protection device includes side plates 4, and the side plates 4 seal the link gaps of the chain 3.

[0026] To prevent dirt and dust from entering the chain 3, the protection device further includes a top plate 5. The top plate 5 is arranged above the chain 3. The lower surface of the top plate 5 is fixedly installed on the outer surface of the side plate 4. One end of the side plate 4 is hinged to the outer surface of the chain 3 through a pin shaft. The side plates 4 are located on both sides of the chain 3. By arranging the top plate 5 above the chain 3, dirt and dust can be prevented from entering the chain 3. By hinging the side plates 4 to the outer surface of the chain 3, the side plates 4 and the chain 3 move synchronously, so that the protection device and the chain 3 move synchronously. At the same time, it can effectively prevent external objects from entering the area of the chain 3 and reduce the wear of the chain 3.

[0027] To absorb the noise generated when the chain 3 operates, a sound insulation rubber pad 6 is fixedly installed on the outer surface of one side of the side plate 4. The outer surface of the sound insulation rubber pad 6 is in contact with the outer surface of the chain 3. By installing the sound insulation rubber pad 6 on the outer surface of the side plate 4, the sound insulation rubber pad 6 can well absorb the noise generated when the chain 3 operates.

[0028] By arranging the protection device outside the chain 3 to seal the chain 3, the top plate 5 in the protection device is arranged above the chain 3, so as to prevent dirt and dust from entering the chain 3. The lower surface of the top plate 5 is fixedly installed on the outer surface of the side plate 4. One end of the side plate 4 is hinged to the outer surface of the chain 3 through a pin shaft. The side plates 4 are located on both sides of the chain 3. At this time, the protection device will follow the operation of the chain 3, effectively blocking the intrusion of dust, dirt and other foreign objects, reducing the wear of the chain 3 and the sprocket, and extending the service life. A sound insulation rubber pad 6 is fixedly installed on the outer surface of one side of the side plate 4. The outer surface of the sound insulation rubber pad 6 is in contact with the outer surface of the chain 3. The sound insulation rubber pad 6 can well absorb the noise generated when the chain 3 operates, solving the technical problems that the existing chain 3 transmission device will be contaminated by dirt and generate greater noise during operation.

[0029] To enable the protection device to always fit the operation of the chain 3, a first support plate 7 is hinged to the outer surface of the side plate 4 through a pin shaft. The outer surface of the first support plate 7 is hinged to the outer surface of the adjacent side plate 4 through a pin shaft. A second support plate 8 is hinged to the outer surface of the first support plate 7 through a pin shaft. One end of the second support plate 8 is hinged to the outer surface of the adjacent first support plate 7 through a pin shaft. By hinging the first support plate 7 to the outer surface of the side plate 4 and hinging the first support plate 7 and the second support plate 8, the protection device can also fit the chain 3 on the non-linear section of the chain 3, so that the chain 3 will not be affected by the protection device during operation.

[0030] To prevent the protection device from shifting, a limit seat 9 is fixedly installed on the outer surface of the first support plate 7. The limit seat 9 is slidably inserted into the limit cylinder 10, and one end of the limit cylinder 10 is fixedly installed on the outer surface of the chain 3. By installing the limit seat 9 on the outer surface of the first support plate 7 and slidably inserting the limit seat 9 into the limit cylinder 10, the protection device will not shift when the chain 3 operates, thereby improving the stability and safety of the device.

[0031] To reduce the vibration of the chain 3, a spring 11 is fixedly installed on the inner surface of the limit seat 9, and one end of the spring 11 is fixedly connected to one end of the limit cylinder 10. By fixedly installing the spring 11 on the inner surface of the limit cylinder 10, the spring 11 will absorb the vibration generated by the chain 3, making the structure more stable.

[0032] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A transmission device for a timing chain, comprising a first camshaft (1) and a second camshaft (2), characterized in that: The outer surfaces of the first camshaft (1) and the second camshaft (2) are engaged with a chain (3). A protection device is provided outside the chain (3). The protection device includes side plates (4), and the side plates (4) seal the link gaps of the chain (3).

2. The drive device of a timing chain according to claim 1, characterized in that: The protection device further includes a top plate (5). The top plate (5) is located above the chain (3). The lower surface of the top plate (5) is fixedly installed on the outer surface of the side plates (4). One end of the side plates (4) is hinged to the outer surface of the chain (3) through a pin shaft. The side plates (4) are located on both sides of the chain (3).

3. A transmission device for a timing chain according to claim 1, characterized in that: A sound insulation rubber pad (6) is fixedly installed on the outer surface of one side of the side plates (4), and the outer surface of the sound insulation rubber pad (6) is in contact with the outer surface of the chain (3).

4. A driving device for a timing chain according to claim 1, characterized in that: A first support plate (7) is hinged to the outer surface of the side plates (4) through a pin shaft. The outer surface of the first support plate (7) is hinged to the outer surface of the adjacent side plates (4) through a pin shaft. A second support plate (8) is hinged to the outer surface of the first support plate (7) through a pin shaft. One end of the second support plate (8) is hinged to the outer surface of the adjacent first support plate (7) through a pin shaft.

5. The drive device of a timing chain according to claim 4, characterized in that: A limit seat (9) is fixedly installed on the outer surface of the first support plate (7). A limit cylinder (10) is slidably inserted into the inner wall of the limit seat (9). One end of the limit cylinder (10) is fixedly installed on the outer surface of the chain (3).

6. The drive device for a timing chain according to claim 5, characterized in that: A spring (11) is fixedly installed on the inner surface of the limit seat (9), and one end of the spring (11) is fixedly connected to one end of the limit cylinder (10).

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