CN219035456U

CN219035456U - Balance shaft structure of single-cylinder engine of motorcycle

Info

Publication number: CN219035456U
Application number: CN202223500600.3U
Authority: CN
Inventors: 李玲; 郭才冬
Original assignee: Chongqing Zongshen Engine Manufacturing Co Ltd
Current assignee: Chongqing Zongshen Engine Manufacturing Co Ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-05-16
Anticipated expiration: 2032-12-27

Abstract

The utility model relates to a motorcycle engine technical field discloses a balanced axle construction of motorcycle single cylinder engine, including bent axle and crank, bent axle both sides are equipped with left crank bearing and right crank bearing, a serial communication port, the cover is equipped with balanced driving gear on the right crank bearing, balanced driving gear meshing balanced driven gear, balanced driven gear pressure equipment is epaxial, keep away from on the balance axle the one end of bent axle is equipped with water pump impeller, and the other end is equipped with bearing, one side of balanced driven gear is driving sprocket, driving sprocket connects timing chain, and the space volume of engine is less exquisite, convenient to use is reliable and low cost.

Description

Balance shaft structure of single-cylinder engine of motorcycle

Technical Field

The utility model relates to the technical field of motorcycle engines, in particular to a balance shaft structure of a single-cylinder engine of a motorcycle.

Background

The fuel in the cylinder of the motorcycle engine is burnt to generate heat energy, the heat energy is converted into mechanical energy, and then the crank shaft drives the wheels of the motorcycle to rotate, so that the motorcycle can run, and the engine of the motorcycle has the advantages of small volume and low noise because the space of the motorcycle is limited.

Chinese literature CN115450743a discloses a motorcycle engine, including the crankcase body, the outside of crankcase body is equipped with water pump shell and is located impeller in the water pump shell, is equipped with oil pump, bent axle and balance shaft in the crankcase body, the balance shaft with the cooperation of bent axle transmission, its characterized in that, the one end of balance shaft with impeller coaxial links firmly, this balance shaft pass through the driving medium with the drive shaft transmission cooperation of oil pump, the driving medium is close to the impeller is arranged and acts on the balance shaft along radial.

The prior art has the following defects: the conventional motorcycle engine with the balance shaft is characterized in that the balance shaft is arranged in the center of the corresponding crank group, so that more space of the engine box is occupied, and the internal space of the motorcycle engine is insufficient.

Disclosure of Invention

The utility model aims to provide a balance shaft structure of a single-cylinder engine of a motorcycle, which solves the problem that the structure of the engine of the motorcycle is not compact, so as to realize the miniaturization of the engine.

In order to achieve the above purpose, the utility model provides a balance shaft structure of a single-cylinder engine of a motorcycle, which comprises a crankshaft and a crank, wherein a left crankshaft bearing and a right crankshaft bearing are assembled on two sides of the crankshaft.

In order to stabilize the whole structure and occupy less space, the balance driven gear and the driving sprocket are of an integrated structure.

In order to ensure the stability of the balance shaft structure, the balance shaft is provided with a swinging block, and the direction of the swinging block is in the same direction as that of the crank.

Preferably, the throwing block is semicircular.

In order to improve connection stability, a lock nut and a washer are sleeved on the right crankshaft bearing, and the balance driving gear is fastened through the lock nut and the washer.

Further, the left crank bearing is mounted on the left crank case, and the right crank bearing is mounted on the right crank case.

The beneficial effects are that: the balance shaft structure is arranged on the side, occupies less space in the engine box, can reduce the space occupied by the engine, and ensures that the engine structure is more compact and the space volume of the engine is smaller; the structure design is ingenious, the use is convenient and reliable, the cost is low, and the shock absorption effect on the engine is achieved.

Drawings

Fig. 1 is a schematic structural view of a balance shaft structure of a single cylinder engine of a motorcycle in embodiment 1;

fig. 2 is a schematic view of the balance shaft assembled behind the engine shaft housing.

Reference numerals: 1. a crankshaft; 2. a crank; 3. a left crankshaft bearing; 4. a right crankshaft bearing; 5. balance driving gear; 6. balancing the driven gear; 7. a balance shaft; 8. a water pump impeller; 9. needle roller bearings; 10. a drive sprocket; 11. a bearing; 12. a timing chain; 13. a throwing block; 14. a driving tooth bush; 15. a lock nut; 16. a gasket; 17. a left crankcase body; 18. a right crankcase body; 19. a chain cavity.

Detailed Description

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings, but the present utility model is not limited to these embodiments, and modifications made to the present utility model without departing from the principle of the present utility model fall within the scope of protection of the claims of the present utility model.

Example 1

As shown in fig. 1 and 2, a balance shaft structure of a single-cylinder engine of a motorcycle comprises a crankshaft 1 and a crank 2, wherein a left crankshaft bearing 3 and a right crankshaft bearing 4 are assembled on two sides of the crankshaft 1, a balance driving gear 5 is sleeved on the right crankshaft bearing 4, the balance driving gear 5 is meshed with a balance driven gear 6 above, the balance driven gear 6 is pressed on a balance shaft 7, one end, far away from the crankshaft 1, of the balance shaft 7 is provided with a water pump impeller 8, the other end is provided with a needle bearing 9, one side of the balance driven gear 6 is provided with a driving sprocket 10, the other side is provided with a bearing 11, the driving sprocket 10 is connected with a timing chain 12, and the balance driven gear 6 and the driving sprocket 10 are of an integrated structure.

The balance shaft 7 is provided with a swinging block 13, the swinging block 13 faces the crank 2 in the same direction, and the swinging block 13 is semicircular.

The right side of the crankshaft 1 is sequentially provided with a right crankshaft bearing 4, a driving gear bushing 14, a balance driving gear 5, a lock nut 15 and a gasket 16, wherein the lock nut 15 and the gasket 16 are sleeved on the right crankshaft bearing 4, and the balance driving gear 5 is fastened through the lock nut 15 and the gasket 16.

The left crankshaft bearing 3 is assembled on the left crankcase 17, the right crankshaft bearing 4 is assembled on the right crankcase 18, a chain cavity 19 for the timing chain 12 to pass through is arranged on the right crankcase 18, and the balance shaft 7 is arranged on one side of the chain cavity 19 of the right crankcase 18.

Claims

1. The utility model provides a balanced axle construction of motorcycle single cylinder engine, includes bent axle (1) and crank (2), left crank bearing (3) and right crank bearing (4) are equipped with to bent axle (1) both sides, a serial communication port, cover is equipped with balanced driving gear (5) on right crank bearing (4), balanced driving gear (5) meshing balanced driven gear (6), balanced driven gear (6) pressure equipment is on balanced axle (7), keep away from on balanced axle (7) one end of bent axle (1) is equipped with water pump impeller (8), and the other end is equipped with bearing (9), one side of balanced driven gear (6) is driving sprocket (10), driving sprocket (10) connect timing chain (12).

2. The balance shaft structure of a single cylinder engine of a motorcycle according to claim 1, wherein: the balance driven gear (6) and the driving sprocket (10) are of an integrated structure.

3. The balance shaft structure of a single cylinder engine of a motorcycle according to claim 1 or 2, characterized in that: the balance shaft (7) is provided with a swinging block (13), and the direction of the swinging block (13) is in the same direction as the crank (2).

4. A balance shaft structure of a single cylinder engine of a motorcycle according to claim 3, wherein: the throwing block (13) is semicircular.

5. The balance shaft structure of a single cylinder engine of a motorcycle according to claim 4, wherein: the right crankshaft bearing (4) is sleeved with a lock nut (15) and a gasket (16), and the balance driving gear (5) is fastened through the lock nut (15) and the gasket (16).

6. The balance shaft structure of a motorcycle single cylinder engine according to claim 4 or 5, characterized in that: the left crankshaft bearing (3) is assembled on a left crankcase (17), and the right crankshaft bearing (4) is assembled on a right crankcase (18).