CN112523833A

CN112523833A - Lubricating structure of motorcycle engine

Info

Publication number: CN112523833A
Application number: CN202011500626.0A
Authority: CN
Inventors: 金潮; 张立成; 莫康鑫; 张林江; 郑海刚
Original assignee: Zhejiang Qianjiang Motorcycle Co Ltd
Current assignee: Zhejiang Qianjiang Motorcycle Co Ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-03-19

Abstract

The invention provides a lubricating structure of a motorcycle engine, and belongs to the technical field of motorcycles. The lubricating structure solves the technical problem that the lubricating structure of the existing balance shaft can not balance the lubrication of the peripheral piston, cylinder and other parts of the shaft. This lubricating structure of motorcycle engine includes the cylinder body, it is connected with balanced axle to rotate in the cylinder body, be equipped with the lubricated oil duct in the lateral wall of cylinder body, the inside wall of cylinder body has the mounting groove, the one end of balanced axle is inserted and is established and cooperate in the mounting groove, the terminal surface of balanced axle and the bottom surface looks interval of mounting groove, the lubricated oil duct is linked together with the mounting groove, this end terminal surface of balanced axle has the mesopore that sets up along balanced axle length direction, the outer peripheral face of balanced axle has the oilhole that splashes that is linked together with the mesopore, can throw away from this balanced axle surface inflow mesopore machine oil through the oilhole. The invention lubricates working components such as the piston on the circumferential periphery of the balance shaft, the inner wall of the cylinder and the like through an ingenious structure, and improves the lubricating effect.

Description

Lubricating structure of motorcycle engine

Technical Field

The invention belongs to the technical field of motorcycles, and relates to a lubricating structure of a motorcycle engine.

Background

The balance shaft technology is widely applied to the motorcycle engine, has a simple and practical structure, and can effectively reduce the vibration of the whole motorcycle and improve the driving comfort. In order to eliminate vibration, a common mode adopted on a motorcycle engine is to add a balance shaft for solving the problem. The balance shaft is actually a shaft which is provided with the eccentric weight and rotates along with the crankshaft synchronously, the balance shaft drives the eccentric weight to rotate at a high speed when in work, and the engine obtains a good balance effect and reduces the vibration of the engine by utilizing the reverse vibration force generated by the eccentric weight.

The patent with the publication number of CN208996788U discloses a lubricating structure for dual balance shafts, in which the balance shaft is installed in a shaft seat, a bushing is disposed between the balance shaft and the shaft seat, the bushing has an oil inlet, the oil inlet is communicated with a lubricating oil channel of the shaft seat, lubricating oil enters a gap between the balance shaft and the bushing via the oil inlet to form a lubricating oil film, the balance shaft is provided with an oil hole, an axis of the oil hole intersects and is perpendicular to an axis of the balance shaft, and the oil hole is a through hole.

The balance shaft lubricating structure can provide lubrication for the matching surface of the balance shaft, and parts such as a piston, a cylinder and the like around the balance shaft are often insufficient in lubricating effect. To solve this problem, one of ordinary skill in the art would readily consider such as: the lubricating oil quantity at the position is increased or the lubricating oil path is increased on the cylinder and the piston component to increase the lubricating area so as to improve the lubricating effect.

Disclosure of Invention

The invention provides a lubricating structure of a motorcycle engine aiming at the problems in the prior art, and the technical problems to be solved by the invention are as follows: how to improve the lubricating effect of the outer peripheral member of the balance shaft.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides a lubricating structure of motorcycle engine, the engine includes box and balanced axle, and the both ends of balanced axle are rotated and are set up on the box lateral wall, lubricating structure is including seting up the lubricated oil duct on the box lateral wall, its characterized in that, the mesopore that has in the balanced axle and set up along balanced axle length direction, the mesopore extend to the tip of balanced axle and with lubricated oil duct intercommunication, the outer peripheral face of this balanced axle has the oilhole that splashes with this mesopore intercommunication. The box body is an installation shell of a motorcycle engine and a transmission, a balance shaft is rotatably connected in the box body, two ends of the balance shaft are matched with the side wall of the box body, the balance shaft is generally arranged adjacent to the crankshaft assembly, the balance shaft can be accurately driven by the engine to rotate when the engine works, and an eccentric counterweight on the balance shaft can generate reverse vibration force to balance with the vibration of an engine piston when the balance shaft rotates, so that the vibration of the whole engine is reduced; the lubricating oil channel is arranged in the side wall of the box body, and engine oil can be pumped out to provide a lubricating effect for rotation of the balance shaft. The balance shaft is provided with the middle hole, the middle hole extends to the end part of the balance shaft and is communicated with the lubricating oil channel, the outer peripheral surface of the balance shaft is provided with the splashing oil hole communicated with the middle hole, so that engine oil can flow into the middle hole along the trend, the balance shaft is driven by an engine to rotate at a high speed, the engine oil continuously flows into the middle hole, meanwhile, the engine oil in the middle hole can continuously flow along the inner wall of the middle hole under the centrifugal and gravity effects, the engine oil flows into the splashing oil hole when the balance shaft rotates to enable the splashing oil hole to be aligned with the engine oil on the inner wall of the middle hole, meanwhile, the engine oil in the splashing oil hole is thrown outwards along the rotating tangential direction through the centrifugal effect due to the fact that the balance shaft still rotates, oil mist is formed at the same time, and therefore the thrown engine oil and the formed oil mist can lubricate working.

In the lubricating structure of the motorcycle engine, the inner side wall of the cylinder body box body is provided with a mounting groove, one end of the balance shaft is inserted and matched in the mounting groove, and the middle hole extends to the end face of the balance shaft and is communicated with the lubricating oil channel through the mounting groove. Set up the mounting groove through the inside wall at the box, make the one end of balance shaft insert locate the mounting groove in and make the mesopore pass through mounting groove and lubricated oil duct intercommunication, the machine oil that reaches balance shaft tip like this partly can follow the fit clearance of balance shaft and flow to its and the mounting groove interval space between the bottom surface in, and then flow in and be located the mesopore of balance shaft terminal surface, this structure can reduce the influence that the rotation of balance shaft produced lubricating oil inflow mesopore, guarantees lubricated effect.

In the lubricating structure of the motorcycle engine, the plurality of the splashing oil holes are arranged at intervals along the length direction of the balance shaft, and the plurality of the splashing oil holes are arranged along the circumferential direction of the balance shaft in a staggered manner. Through set up a plurality of oilholes that splash along balanced axle length direction interval arrangement on balanced epaxial to make a plurality of oilholes that splash along balanced axle's circumference dislocation arrangement, can guarantee that one oilhole that splashes other oilholes that splash are idle state when throwing away machine oil like this, guarantee the machine oil volume and the oil mist volume that the single was thrown away, and other oilholes that splashes can guarantee the pressure balance of the inside of mesopore when idle, avoid machine oil to throw away the effect that splashes that the inside under-pressure of mesopore influences machine oil simultaneously.

In the lubricating structure of the motorcycle engine, the balance shaft is provided with the balance weight, the middle hole and the balance shaft are coaxially arranged, the position of the splashing oil hole along the length direction of the balance shaft corresponds to the position of the balance weight, and the splashing oil hole and the corresponding balance weight are respectively positioned at two sides of the circumference of the balance shaft. The balancing piece can guarantee the balanced effect to engine vibration, just right with the position that corresponds the balancing piece along balancing axle length direction's position through setting up the oilhole that splashes to make the oilhole that splashes and the balancing piece that corresponds be located balancing axle circumference's both sides respectively, also can participate in eccentric vibration with the partial counter weight that splashes oilhole centrosymmetric on the balancing axle like this, do benefit to and alleviate the quality of outfit when guaranteeing balanced effect.

In the lubricating structure of the motorcycle engine, a bearing bush is embedded in the mounting groove, the inner edge surface of the bearing bush is in clearance fit with the outer peripheral surface of the balance shaft, and the bearing bush is provided with an oil inlet through hole communicated with the lubricating oil channel. Through set up the axle bush in the mounting groove, the axle bush is avoided the direct and box body of balance shaft to produce friction loss, reduce the maintenance cost, the outer peripheral face clearance fit who sets up the inner fringe face of axle bush and balance shaft to set up the oil feed through-hole that is linked together with the lubricated oil duct on the axle bush, like this balanced axle can gush out from the lubricated oil duct and form the lubricating film through the clearance of oil feed through-hole entering between balance shaft and the axle bush inner edge when rotating along with engine work, provide lubrication for the axle bush.

In the lubricating structure of the motorcycle engine, the oil inlet through holes are provided with a plurality of oil inlet through holes which are arranged at intervals along the circumferential direction of the bearing bush, and the oil inlet through holes are communicated with the lubricating oil channel. Through setting up a plurality of oil feed through-holes along the circumference interval arrangement of axle bush and all communicate with the lubricated oil duct, the fitting surface of axle bush and balance shaft is poured into simultaneously to the many places oil feed through-holes of machine oil accessible in the lubricated oil duct like this, and increase machine oil supply flow, and then guarantee the lubricated effect of axle bush and the lubricated sufficiency that splashes oil hole department and throw away machine oil.

In the lubricating structure of the motorcycle engine, the box body comprises an upper box body and a lower box body, the upper box body and the lower box body are fixedly connected and form the mounting groove and the lubricating oil channel, and the mounting groove and the lubricating oil channel are both positioned at the joint of the upper box body and the lower box body. Including box and lower box through setting up the box, form mounting groove and lubricated oil duct when making last box and lower box link firmly, mounting groove and lubricated oil duct set up the junction at last box and lower box promptly, guarantee like this that the processing degree of difficulty of mounting groove and lubricated oil duct is lower, reduce cost, in addition maintain with the dismouting make can be with last box and lower box separation, make the maintenance of whole balance shaft lubrication assembly also more convenient.

In the lubricating structure of the motorcycle engine, the lubricating oil channel comprises a conveying section and a flow bypassing section which are communicated, the conveying section is arranged along the joint surface of the upper box body and the lower box body, and the flow bypassing section is arranged along the inner edge of the mounting groove and is opposite to the oil inlet through hole. The lubricating oil channel is arranged and comprises a conveying section and a flow bypassing section, the conveying section is arranged along the joint surface of the upper box body and the lower box body, the flow bypassing section is arranged along the inner edge of the mounting groove and is right opposite to the oil inlet through holes, so that engine oil of the lubricating oil channel can enter the plurality of oil inlet through holes in the bearing bush through the flow bypassing section simultaneously, and the lubricating effect is guaranteed.

In the lubricating structure of the motorcycle engine, the outer peripheral surface of the bearing bush is provided with a limiting block, the inner edge surface of the mounting groove is provided with a positioning groove, and the limiting block is clamped and matched in the positioning groove. Through the constant head tank joint cooperation that sets up stopper and mounting groove inner fringe face in the outer peripheral face at the axle bush, guarantee like this that the circumference and the axial position of axle bush in the mounting groove are stable, avoid lubricating-oil duct and oil feed through-hole to produce the dislocation, guarantee whole lubricating system steady operation.

In the lubricating structure of the motorcycle engine, the outer peripheral surface of the balance shaft is further provided with a notch groove, the notch groove is opposite to the balance block along the length direction of the balance shaft, and the notch groove is adjacent to the corresponding splashing oil hole. By providing the notched groove on the balance shaft, it is further possible to cause a portion of the balance weight that is symmetrical with respect to the center of the notched groove to participate in eccentric vibration.

Compared with the prior art, the invention has the following advantages:

the lubricating structure of the motorcycle engine has the advantages that the mounting groove is formed in the inner side wall of the box body, one end of the balance shaft is inserted into the mounting groove and is spaced from the bottom surface of the mounting groove, part of engine oil reaching the end surface of the balance shaft through the lubricating oil channel can flow into a space between the balance shaft and the bottom surface of the mounting groove from a matching gap of the balance shaft, the end surface of the balance shaft is provided with the middle hole, the outer peripheral surface of the balance shaft is provided with the splashing oil hole communicated with the middle hole, when the splashing oil hole is opposite to the engine oil on the inner wall of the middle hole, the engine oil flows into the splashing oil hole, and simultaneously the engine oil in the splashing oil hole is thrown outwards along the rotating tangential direction through the centrifugal action due to the rotation of the balance shaft, oil mist is formed at the same time, and accordingly, the thrown engine oil and the formed oil mist can lubricate working parts such, thereby improving the lubrication effect.

Drawings

FIG. 1 is a perspective view showing the assembled state of the lubricating structure of the motorcycle engine according to the embodiment.

FIG. 2 is a schematic sectional view showing the structure of the lubricating structure of the motorcycle engine in the embodiment.

Fig. 3 is an enlarged view of a portion a in fig. 2.

FIG. 4 is a schematic sectional view of the lubricating structure of the motorcycle engine according to another embodiment.

Fig. 5 is an enlarged view of a portion B in fig. 4.

FIG. 6 is a schematic view showing a partial explosion structure of the lubricating structure of the motorcycle engine in the embodiment.

FIG. 7 is a perspective view of the lower case of the embodiment.

In the figure, 1, a box body; 11. a lubricating oil passage; 111. a conveying section; 112. a flow winding section; 12. mounting grooves; 121. positioning a groove; 13. an upper box body; 14. a lower box body;

2. a balance shaft; 21. a mesopore; 22. a splash oil hole; 23. a counterbalance; 24. a notch groove;

3. bearing bushes; 31. an oil inlet through hole; 32. and a limiting block.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1-7, the lubricating structure of the motorcycle engine comprises a box body 1, a balance shaft 2 arranged in the horizontal direction is arranged in the box body 1, a lubricating oil channel 11 is arranged in the side wall of the box body 1, the inner side wall of the box body 1 is provided with a mounting groove 12, one end of the balance shaft 2 is rotatably matched in the mounting groove 12, a channel for engine oil to flow through is formed between the end surface of the balance shaft 2 and the bottom surface of the mounting groove 12 at intervals, the lubricating oil channel 11 is communicated with the mounting groove 12, a middle hole 21 arranged along the length direction of the balance shaft 2 is arranged in the center of the end surface of the balance shaft 2, the inner end of the middle hole 21 is closed, the outer end of the middle hole 21 is in a flaring shape, a splashing oil hole 22 communicated with the middle hole 21 is arranged on the outer peripheral surface of the balance. Further, the two splashing oil holes 22 are arranged at intervals along the length direction of the balance shaft 2, and the two splashing oil holes 22 are arranged along the circumferential direction of the balance shaft 2 in a staggered manner. The balance shaft 2 is provided with two fan-shaped balance blocks 23, the position of the splashing oil hole 22 along the length direction of the balance shaft 2 corresponds to the position of the balance block 23, and the splashing oil hole 22 and the balance block 23 are respectively positioned at different positions of the circumference of the balance shaft 2. The outer peripheral surface of the balance shaft 2 is further provided with two notch grooves 24, the positions of the notch grooves 24 are opposite to the positions of the balance weights 23 along the length direction of the balance shaft 2, and the notch grooves 24 are located between the splashing oil holes 22 and the balance weights 23 along the circumferential direction of the balance shaft 2. Preferably, two bearing bushes 3 fastened to form an annular shape are embedded in the mounting groove 12, the outer circumferential surface of the balance shaft 2 is sleeved with the bearing bushes 3 and can rotate relatively, and the bearing bushes 3 are provided with oil inlet through holes 31 communicated with the lubricating oil passages 11. The two oil inlet through holes 31 on the two bearing bushes 3 are respectively arranged upwards and downwards and are communicated with the lubricating oil channel 11 on the inner edge of the mounting groove 12.

As shown in fig. 1 and 4-7, the housing 1 includes an upper housing 13 and a lower housing 14, the upper housing 13 and the lower housing 14 are fastened by bolts to form a mounting groove 12 and a lubricating oil passage 11 therebetween, and the mounting groove 12 and the lubricating oil passage 11 are located at a joint of the upper housing 13 and the lower housing 14. Further, the lubricating oil passage 11 includes a delivery section 111 and a bypass section 112 which are communicated with each other, the delivery section 111 is disposed along the joint end surface of the lower case 14, and the bypass section 112 is disposed along the inner edge of the mounting groove 12 and is communicated with the oil inlet through hole 31 on the bearing bush 3. The outer peripheral face of every axle bush 3 all has a stopper 32, and the interior edgewise face of mounting groove 12 has constant head tank 121, and stopper 32 snap-fit is in constant head tank 121.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. The utility model provides a lubricating structure of motorcycle engine, the engine includes box (1) and balanced axle (2), and the both ends of balanced axle (2) are rotated and are set up on box (1) lateral wall, lubricating structure is including offering lubricating oil duct (11) on box (1) lateral wall, characterized in that, mesopore (21) that set up along balanced axle (2) length direction have in balanced axle (2), mesopore (21) extend to the tip of balanced axle (2) and with lubricating oil duct (11) intercommunication, the outer peripheral face of this balanced axle (2) has the oilhole that splashes (22) with this mesopore (21) intercommunication.

2. A lubricating structure of a motorcycle engine as claimed in claim 1, characterised in that the inner side wall of the case (1) has a mounting groove (12), one end of the balance shaft (2) is inserted in the mounting groove (12), the center hole (21) extends to the end face of the balance shaft (2) and communicates with the lubricating oil passage (11) through the mounting groove (12).

3. The lubricating structure of the motorcycle engine according to claim 1, wherein the plurality of the splash oil holes (22) are arranged at intervals along the length direction of the balance shaft (2), and the plurality of the splash oil holes (22) are arranged in a staggered manner along the circumferential direction of the balance shaft (2).

4. The lubricating structure of a motorcycle engine according to claim 1, wherein the balance shaft (2) has a balance weight (23), the center hole (21) is arranged coaxially with the balance shaft (2), the position of the splash oil hole (22) in the length direction of the balance shaft (2) corresponds to the position of the balance weight (23), and the splash oil hole (22) and the corresponding balance weight (23) are respectively located on both sides of the balance shaft (2) in the circumferential direction.

5. A lubricating structure for a motorcycle engine according to claim 2, wherein a bush (3) is fitted in the mounting groove (12), the bush (3) is fitted around the outer peripheral surface of the balance shaft (2), and the bush (3) has an oil inlet through hole (31) communicating with the lubricating oil gallery (11).

6. A lubricating structure of a motorcycle engine, as claimed in claim 5, wherein there are a plurality of the oil inlet through holes (31) and the oil inlet through holes (31) are arranged at intervals along the circumferential direction of the bearing bush (3), and the oil inlet through holes (31) are all communicated with the lubricating oil passage (11).

7. The lubricating structure of a motorcycle engine according to claim 6, wherein the case (1) includes an upper case (13) and a lower case (14), the upper case (13) and the lower case (14) being fixedly connected and forming the mounting groove (12) and the lubricating oil gallery (11), the mounting groove (12) and the lubricating oil gallery (11) being located at a joint of the upper case (13) and the lower case (14).

8. The lubricating structure of a motorcycle engine as set forth in claim 7, wherein the lubricating oil gallery (11) includes a delivery section (111) and a bypass section (112) communicating with each other, the delivery section (111) being disposed along a joint surface of the upper case (13) and the lower case (14), and the bypass section (112) being disposed along an inner edge of the mounting groove (12) and communicating with the oil-feeding through-hole (31).

9. A lubricating structure of a motorcycle engine as claimed in claim 5, characterised in that the bearing shell (3) has a stopper (32) on its outer peripheral surface, the mounting groove (12) has a positioning groove (121) on its inner edge surface, and the stopper (32) is snap-fitted into the positioning groove (121).

10. The lubricating structure for a motorcycle engine according to claim 3, wherein the outer peripheral surface of the balance shaft (2) further has a notched groove (24), the notched groove (24) is located directly opposite to the counterweight (23) in the longitudinal direction of the balance shaft (2), and the notched groove (24) is located adjacent to the corresponding splash oil hole (22).