CN106703930A - Lubricating oil way structure used for motorcycle engine - Google Patents

Abstract

The invention discloses a lubricating oil way structure used for a motorcycle engine. The lubricating oil way structure comprises a left crank, a right crank and a crank pin connected between the left crank and the right crank. A starting clutch is mounted on the left crank through a needle bearing. A first lubricating oil channel is formed in the right crank. The crank pin is provided with a crank pin lubricating oil channel which communicates with the first lubricating oil channel. A second lubricating oil channel which communicates with the crank pin lubricating oil channel is formed in the left crank. A lubricating oil hole which communicates with the second lubricating oil channel is formed in the mounting position of the needle bearing. Through the lubricating oil way structure, the reliable lubrication of the needle bearing position of the starting clutch is ensured, meanwhile, lubricating oil can be used for cooling a magnetor, the reliability of the magnetor is improved, the advantages of good lubricating effect, high reliability and the like are achieved, the performance of the engine is improved advantageously, and the service life of the engine is prolonged advantageously.

Description

Lubricating oil circuit structure for motorcycle engine

technical field

The invention belongs to the technical field of motorcycle engines, and relates to a lubricating oil circuit structure for motorcycle engines.

Background technique

The lubrication system is an important guarantee for the normal operation of the motorcycle engine. When the engine starts, the starting clutch gear drives the magneto rotor to rotate through the starting clutch, thereby driving the crank to rotate to achieve the purpose of engine ignition. After starting, the left crank and the starting clutch gear In long-term idling conditions.

Usually, the motorcycle engine has an oil passage on the right crank and crank pin to lubricate the needle roller bearing of the big end of the connecting rod, while the position of the needle roller bearing (shaft sleeve) of the starting clutch on the left crank only relies on oil mist lubrication. When starting, due to the large load carried, the starting clutch needle roller bearing (shaft sleeve) is very likely to be stuck and locked, which has a strong impact on the performance and service life of the engine.

Contents of the invention

In view of this, the present invention provides a lubricating oil circuit structure for a motorcycle engine to lubricate the friction pairs at the needle roller bearings of the starting clutch and solve the problems of sticking and locking of the needle roller bearings of the starting clutch.

Its technical scheme is as follows:

A lubricating oil circuit structure for a motorcycle engine, comprising a left crank, a right crank and a crank pin connected between the left crank and the right crank, a starting clutch is installed on the left crank through a needle bearing, the The right crank is provided with a first lubricating oil passage, and the crank pin is provided with a crank pin lubricating oil passage communicating with the first lubricating oil passage. The key point is that the left crank is provided with a lubricating oil passage leading to the crank pin A second lubricating oil passage, and a lubricating oil hole communicating with the second lubricating oil passage is provided at the installation position of the needle roller bearing.

With the above structure, after the lubricating oil enters the crankpin lubricating oil passage through the first lubricating oil passage, it can continue to flow into the second lubricating oil passage, and is sprayed out through the lubricating oil hole to lubricate the friction pair at the needle roller bearing of the starting clutch. Thereby improving the lubrication condition at this position, preventing the needle roller bearing of the starting clutch from sticking or locking, and ensuring the normal operation of the engine.

Further, the end of the left crank is equipped with a magneto through a fastening bolt, and the fastening bolt penetrates horizontally along the end surface of the left crank, and the fastening bolt is axially provided with a magneto connected to the second lubricating oil passage The lubricating oil hole, this structure enables the lubricating oil to be sprayed out through the lubricating oil hole of the magneto to cool the magneto and improve the reliability of the magneto.

In order to facilitate the connection between the crank pin lubricating oil passage and the first and second lubricating oil passages, the crank pin is provided with an oil inlet and a Oil outlet.

Furthermore, both ends of the crank pin lubricating oil passage are closed by an oil passage plug to ensure the sealing of the crank pin lubricating oil passage, and the oil inlet and oil outlet are respectively close to the two ends of the crank pin lubricating oil passage , between the oil inlet and the oil outlet, there is an oil passage hole connected to the needle roller bearing of the big end of the connecting rod, so as to ensure the lubrication of the needle roller bearing of the big end of the connecting rod.

Beneficial effect:

The lubricating oil circuit structure for motorcycle engines adopting the above technical scheme ensures the reliable lubrication of the needle roller bearing position of the starting clutch, and at the same time, the lubricating oil can be used to cool the magneto, which improves the reliability of the magneto and has a lubricating effect Good, high reliability and other advantages, help to improve engine performance and extend service life.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Among the figure, 1, left crank, 11, second lubricating oil passage, 12, lubricating oil hole, 2, right crank, 21, first lubricating oil passage, 3, crank pin, 31, crank pin lubricating oil passage, 32, Oil inlet, 33, oil outlet, 34, oil passage hole, 4, needle roller bearing, 5, starting clutch, 6, fastening bolt, 61, magneto lubricating oil hole, 7, magneto, 8, oil passage Plug, 9, connecting rod big head needle roller bearing.

detailed description

The present invention will be further described below in conjunction with embodiment and accompanying drawing.

The lubricating oil passage structure for a motorcycle engine as shown in Figure 1 includes a left crank 1 and a right crank 2, and a crank pin 3 arranged horizontally is connected between the left crank 1 and the right crank 2, and the center of the crank pin 3 is arranged There is a crank pin oil passage 31 axially penetrating both ends thereof, and the two ends of the crank pin oil passage 31 are sealed by the oil passage plug 8, and the first lubricating oil penetrating horizontally to the right end surface of the right crank 2 is arranged axially. Road 21, the first lubricating oil passage 21 communicates with the crank pin oil passage 31 on the crank pin 3 through an inclined section, and the oil inlet 32 connected to the first lubricating oil passage 21 is provided on the side wall of the crank pin oil passage 31 , The crankpin 3 is also provided with an oil passage hole 34 in the crankpin oil passage 31 which is connected to the position of the big end needle roller bearing 9 of the connecting rod.

The left crank 1 is provided with a second lubricating oil passage 11 axially penetrating to its left end face, the crank pin oil passage 31 communicates with the second lubricating oil passage 11 through the oil outlet 33, and the left crank 1 passes through the needle roller The bearing 4 is covered with a starting clutch 5, and the left crank 5 is provided with a lubricating oil hole 12 connected to the second lubricating oil passage 11 at the installation position corresponding to the needle bearing 4, so as to improve the lubrication of the needle bearing 4.

A magneto 7 is installed at the left end of the left crank 1, and the magneto 7 is fixed by a fastening bolt 6 penetrating horizontally from the left end surface of the left crank 1. Motor lubricating oil hole 61.

The working principle of the present invention is as follows:

The lubricating oil is pumped into the first lubricating oil passage 21 from the right end of the right crank 2, enters the crank pin lubricating oil passage 31 through the oil inlet 32, and part of it is sprayed out through the oil passage hole 34 to lubricate the connecting rod big head needle roller bearing 9, The other part enters the second lubricating oil passage 11 from the oil outlet 33, and then sprays out through the lubricating oil hole 12 to the installation position of the needle roller bearing 4 to lubricate the friction pair of the needle roller bearing 4 of the starting clutch, and the rest is driven by the magneto The lubricating oil hole 61 sprays out to cool the magneto 7 .

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those of ordinary skill in the art can make a variety of similar implementations under the inspiration of the present invention without violating the purpose and claims of the present invention. It means that such transformations all fall within the protection scope of the present invention.

Claims (4)

1. a kind of lubricant oil road structure for motorcycle engine, including left crank (1), right crank (2) and the left side is connected to Crank-pin (3) between crank (1) and right crank (2), on the left crank (1) by needle bearing (4) be provided with starting from Clutch (5), the right crank (2) is provided with the first oil leab (21), and crank-pin (3) is provided with and first oil leab (21) the lubrication oil duct (31) of connection, it is characterised in that：It is communicated with the left crank (1) to lubrication oil Second oil leab (11) in road (31), and it is provided with what is connected with the second oil leab (11) in needle bearing (4) installation site Oilhole (12).

2. the lubricant oil road structure for motorcycle engine according to claim 1, it is characterised in that：The left crank (1) end is provided with magneto (7) by fastening bolt (6), and the fastening bolt (6) penetrates along left crank (1) end face level, The fastening bolt (6) is communicated with to the magneto oilhole (61) of the second oil leab (11) vertically.

3. the lubricant oil road structure for motorcycle engine according to claim 1 and 2, it is characterised in that：The song Handle pin (3) is provided with lubrication oil duct (31) and is respectively communicated to the first oil leab (21) and the second oil leab (11) Oil inlet (32) and oil-out (33).

4. the lubricant oil road structure for motorcycle engine according to claim 3, it is characterised in that：The crank-pin Oil leab (31) two ends are respectively closed by an oil channel plug (8), and oil inlet (32) and oil-out (33) are respectively close to the crank Pin oil leab (31) two ends end, is communicated with to big end needle roller between the oil inlet (32) and oil-out (33) The oil hole (34) of bearing (9).