CN210087431U

CN210087431U - Cooling structure of motorcycle engine

Info

Publication number: CN210087431U
Application number: CN201921004390.4U
Authority: CN
Inventors: 邓定红; 张立成; 程雪君; 郑林; 何强福
Original assignee: Zhejiang Meikeda Motorcycle Co Ltd
Current assignee: Zhejiang Meikeda Motorcycle Co Ltd
Priority date: 2019-06-29
Filing date: 2019-06-29
Publication date: 2020-02-18
Anticipated expiration: 2029-06-29

Abstract

The utility model provides a cooling structure of motorcycle engine belongs to motorcycle technical field. The problem of how to improve the cooling effect of machine oil on the basis of guaranteeing the stability of the engine of the existing motorcycle is solved. This cooling structure of motorcycle engine, engine include the cylinder body and fix the cylinder head on the cylinder body, form the combustion chamber between cylinder body and the cylinder head and be located the chain room of combustion chamber one side, cooling structure is including being located the cylinder head and surrounding the last cooling water cavity that the combustion chamber set up, still has the cooling oil pocket in the cylinder head, and goes up the cooling oil pocket and be linked together with the chain room, goes up the cooling oil pocket and is located the outside in cooling water cavity, and goes up the cooling oil pocket and the chain room is located the both sides in cooling water cavity respectively. This cooling structure of motorcycle engine can guarantee to improve the cooling effect of machine oil on the basis of engine stability.

Description

Cooling structure of motorcycle engine

Technical Field

The utility model belongs to the technical field of the motorcycle, a cooling structure of motorcycle engine is related to.

Background

The motorcycle engine needs to be lubricated and cooled by engine oil in the working process, meanwhile, a chain chamber is also arranged in the engine and is used for transmission connection between a crankshaft and a camshaft, the engine oil can also circulate to the chain chamber to lubricate and cool a chain, the engine oil absorbing heat needs to be cooled to ensure the normal work of the engine, the engine oil is usually cooled by an oil cooler at present, for example, the double-cooling structure of the motorcycle engine disclosed by patent document (application number: 201520422081.4) comprises an engine assembly, a water tank, a water pipe, an oil pipe, a water-cooling radiator and an oil-cooling radiator, the engine assembly comprises a water pump, an oil pump, a cylinder body and a cylinder head, the water pipe is sequentially communicated with the water pump, the cylinder body, the cylinder head, the water-cooling radiator and a water inlet of the water tank through a water outlet of the water tank, and the oil pipe is sequentially communicated, also the intercommunication has oil pipe between oil pump and the cylinder head, can play better cooling effect to machine oil through the oil cooler, but the oil cooler needs to be overhauld as independent functional equipment in long-term use, and has the instability, and the setting of oil cooler has increased manufacturing cost and use cost.

As disclosed in the above patent, a water-cooled radiator is further provided in the engine, and a water-cooled cavity is provided in the cylinder body and the cylinder head for cooling and dissipating heat from the combustion chamber, so that in view of the disadvantage of high cost of the oil cooler, it is easy for those skilled in the art to think of cooling the engine oil by using the cooling water in the water-cooled cavity, such as the motorcycle water-cooled engine cylinder body disclosed in patent document (200420105369.0), in which a water jacket is provided around the cylinder liner of the cylinder body, the cylinder body is further provided with a cylinder head oil inlet channel communicated with the cylinder head oil inlet channel by a tubular heat exchange oil channel, the heat exchange oil channel passes through the water jacket, the engine oil is cooled by providing the heat exchange oil channel passing through the water jacket, however, both ends of the heat exchange tube need to be connected with the oil inlet channel in a butt joint manner, and the tube connector is prone to leakage, engine water ingress will occur which will seriously damage the engine and even cause engine scrapping with a high risk.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided a motorcycle engine's cooling structure for solve the cooling effect who how improves machine oil on the basis of guaranteeing current motorcycle engine stability.

The purpose of the utility model can be realized by the following technical proposal: the cooling structure of the motorcycle engine comprises a cylinder body and a cylinder head fixed on the cylinder body, wherein a combustion chamber and a chain chamber located on one side of the combustion chamber are formed between the cylinder body and the cylinder head, and the cooling structure comprises an upper cooling water cavity located in the cylinder head and arranged around the combustion chamber.

When the engine oil cooling cylinder head works, a large amount of heat is generated in the combustion chamber, the upper cooling water cavity is arranged around the combustion chamber, cooling water circulating inside the upper cooling water cavity can cool and radiate the combustion chamber, and similarly, the cooling water in the upper cooling water cavity can also cool and radiate the engine oil in the chain chamber, compared with the prior engine oil which needs to be provided with an oil cooler for cooling, the subsequent use process needs to overhaul and maintain the oil cooler, so that the production cost and the use cost are increased, an upper cooling oil cavity communicated with the chain chamber is arranged in the cylinder head, the engine oil in the engine enters the chain chamber after passing through the upper cooling oil cavity, the upper cooling oil cavity is positioned outside the upper cooling water cavity, the cooling water in the upper cooling water cavity can cool and radiate the engine oil in the upper cooling oil cavity, so that the engine oil is cooled before entering the chain chamber, and the chain chamber and the upper cooling oil cavity are respectively, the cooling water through last cooling water intracavity different positions cools off, make the cooling water of going up the cooling water intracavity by make full use of, and go up the interior machine oil of cooling oil pocket and chain chamber and also obtain abundant cooling, thereby need not to install the oil cooler, guarantee the cooling effect of machine oil on reduction in production cost and use cost's the basis, and wear to establish the water jacket and cool off machine oil for current through the heat exchange tube, this time the cooling oil pocket is directly seted up on the cylinder body, it only is located the lateral part in cooling water pocket, keep apart with last cooling water pocket, consequently, the risk of cooling water infiltration machine oil can not appear, higher stability has.

In the cooling structure of the motorcycle engine, the upper cooling oil cavity is arranged in an arc shape along the circumferential direction of the upper cooling water cavity. The chain chamber is located on one side of the combustion chamber and is only opposite to the local part of the upper cooling water cavity, the upper cooling oil cavity has a certain length and is arranged along the circumferential direction of the upper cooling water cavity, the circumferential area of the upper cooling water cavity can be fully utilized, the relative area of the upper cooling water cavity and the upper cooling oil cavity is increased, and the cooling and heat dissipation efficiency of engine oil in the upper cooling oil cavity is improved.

In the cooling structure of the motorcycle engine, the cylinder head is provided with a valve chamber, one end of the upper cooling oil cavity is also provided with an oil inlet channel which extends upwards, the upper end of the oil inlet channel penetrates through the valve chamber and forms an oil inlet, and the oil inlet channel is positioned on the outer side of the upper cooling water cavity. The oil inlet channel is used for engine oil to get into, and it is located the outside in cooling water cavity, and the engine oil that passes through also can obtain the cooling heat dissipation of cooling water in the cooling water cavity, improves cooling radiating efficiency.

In the cooling structure of the motorcycle engine, a lower cooling water cavity surrounding the combustion chamber is arranged in the cylinder body, the lower cooling water cavity is communicated with the upper cooling water cavity, a lower cooling oil cavity is also arranged in the cylinder body, the upper cooling oil cavity is communicated with the chain chamber through the lower cooling oil cavity, and the lower cooling oil cavity is positioned outside the lower cooling water cavity. The lower cooling water cavity is used for cooling and radiating the combustion chamber, and engine oil in the upper cooling oil cavity needs to enter the chain chamber after passing through the lower cooling oil cavity, so that the engine oil passing through the lower cooling oil cavity can be cooled and radiated by cooling water in the lower cooling water cavity, and the cooling efficiency of the engine oil is improved.

In the cooling structure of the motorcycle engine, the lower cooling oil cavity is arranged in an arc shape along the circumferential direction of the lower cooling oil cavity, one end of the lower cooling oil cavity in the circumferential direction is communicated with the chain chamber, and the other end of the lower cooling oil cavity is close to the chain chamber. Similarly, the lower cooling oil cavity has a length longer than that of the upper cooling oil cavity in the circumferential direction, and the lower cooling oil cavity is arranged along the circumferential direction of the lower cooling water cavity, so that the circumferential area of the lower cooling water cavity can be fully utilized, the relative area of the lower cooling water cavity and the lower cooling oil cavity is increased, and the cooling and heat dissipation efficiency of engine oil in the lower cooling oil cavity is improved.

In the cooling structure of the motorcycle engine, the side wall of the chain chamber is provided with an oil outlet hole, and the oil outlet hole is positioned on the cylinder body and communicated with one end of the lower cooling oil cavity. The machine oil in the upper cooling oil cavity enters the lower cooling oil cavity and flows into the chain chamber from the oil outlet after flowing along the circumferential direction of the lower cooling oil cavity, so that the flowing time of the machine oil in the lower cooling oil cavity is prolonged, and the cooling and heat dissipation of the machine oil are ensured.

In the cooling structure of the motorcycle engine, the top surface of the end of the lower cooling oil cavity connected with the oil outlet is also provided with a flow guide convex part, the flow guide convex part is provided with a flow guide surface protruding downwards in an arc shape, the higher end of the flow guide surface is connected with the top surface of the lower cooling oil cavity, and the lower end of the flow guide surface is connected with the upper hole wall of the oil outlet. In order to make machine oil last cooling oil pocket and the longer dwell of lower cooling oil pocket in, the oil outlet is less, but leads to piece in the machine oil to pile up in oil outlet department easily, and through the setting of water conservancy diversion face for the area of passing through of oil outlet inboard position diminishes gradually, and the velocity of flow when machine oil passes through is fast gradually promptly, thereby strikes the piece of oil outlet department, avoids the oil outlet to be blockked up.

In the cooling structure of the motorcycle engine, the oil outlet hole is provided with a partition part which divides the oil outlet hole into an upper part and a lower part. The setting of wall portion can make the machine oil that passes through the oil outlet divided into two strands and the velocity of flow increase, and two strands of machine oil strike the last pore wall and the lower pore wall of oil outlet respectively, avoid the piece to pile up.

In the cooling structure of the motorcycle engine, the lower end surface of the cylinder head is provided with a plurality of upper oil passing holes which are communicated with the upper cooling oil cavity, the upper end surface of the cylinder body is provided with a plurality of lower oil passing holes which are communicated with the lower cooling oil cavity, and the upper oil passing holes are opposite to and communicated with the lower oil passing holes one by one. The upper cooling oil cavity is communicated with the lower cooling oil cavity through the upper oil passing holes and the lower oil passing holes, so that engine oil in the upper cooling oil cavity gradually and slowly enters the lower cooling oil cavity, the cooling time of the engine oil is prolonged, and meanwhile, the structure can also increase the structural strength of the cylinder head and the end face of the cylinder body.

In the cooling structure of the motorcycle engine, the lower end surface of the cylinder head is provided with a plurality of upper water through holes, the plurality of upper water through holes are communicated with the upper cooling water cavity, the upper end surface of the cylinder body is provided with a plurality of lower water through holes, the plurality of lower water through holes are communicated with the lower cooling water cavity, the plurality of upper water through holes and the plurality of lower water through holes are opposite one to one and communicated, the upper water through holes are close to the upper water through holes and located on the outer side of the upper water through holes, and the lower water through holes are close to the lower water through holes and located on the outer side of the lower water through holes. The engine oil can be cooled and radiated by cooling water when passing through the upper oil passing hole and the lower oil passing hole, and the cooling and radiating effect is ensured.

Compared with the prior art, the cooling structure of the motorcycle engine has the following advantages:

1. because set up the last cooling oil pocket with chain chamber intercommunication in the cylinder end, the machine oil in the engine gets into the chain chamber after last cooling oil pocket, and goes up the cooling oil pocket and be located the outside in last cooling water cavity, and the cooling water in going up the cooling water intracavity can be to the machine oil cooling heat dissipation in last cooling oil cavity for machine oil gets the cooling before the chain chamber, guarantees the cooling radiating effect to machine oil.

2. Because chain chamber and last cooling oil pocket are located the both sides in last cooling water cavity respectively, cool off through the cooling water of last cooling water intracavity different positions for the cooling water of going up the cooling water intracavity is by make full use of, and goes up the interior machine oil of cooling oil pocket and chain chamber and also obtains abundant cooling, thereby need not to install the oil cooler, guarantees the cooling effect of machine oil on reduction in production cost and use cost's the basis.

3. Because the upper cooling oil cavity and the lower cooling oil cavity are arranged, the cylinder head and the cylinder body form a multilayer structure, and the structural strength is improved.

Drawings

Fig. 1 is a partial front view of a motorcycle engine.

Fig. 2 is a sectional view of the structure at a-a in fig. 1.

Fig. 3 is a sectional view of the structure at B-B in fig. 1.

Fig. 4 is a cross-sectional view of the structure at C-C in fig. 1.

Fig. 5 is a structural sectional view of the cylinder body at D-D in fig. 4.

Fig. 6 is a perspective view of the cylinder head.

Fig. 7 is a perspective view of the cylinder.

In the figure, 1, a cylinder body; 11. a lower cooling water cavity; 12. a lower cooling gallery; 13. an oil outlet hole; 131. a partition part; 14. a flow guide convex part; 141. a flow guide surface; 15. a lower oil passing hole; 16. a lower water through hole; 2. a cylinder head; 21. an upper cooling water cavity; 22. an upper cooling gallery; 23. an oil inlet channel; 231. an oil inlet; 24. an upper oil passing hole; 25. water passing holes are arranged; 26. a valve chamber; 3. a combustion chamber; 4. a chain chamber.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, a cooling structure of a motorcycle engine, the engine includes a cylinder body 1 and a cylinder head 2, the cylinder head 2 is fixed on the upper end of the cylinder body 1, as shown in fig. 2 and 3, a valve chamber 26 is provided in the cylinder head 2, a combustion chamber 3 and a chain chamber 4 are formed between the cylinder body 1 and the cylinder head 2, the chain is flat and located at one side of the combustion chamber 3, the cooling structure includes an upper cooling water chamber 21 located in the cylinder head 2 and a lower cooling water chamber 11 located in the cylinder body 1, the upper cooling water chamber 21 and the lower cooling water chamber 11 are both arranged around the combustion chamber 3, the upper cooling water chamber 21 and the lower cooling water chamber 11 are communicated, an upper cooling oil chamber 22 is further provided in the cylinder head 2, the upper cooling oil chamber 22 is located at the outer side of the upper cooling water chamber 21, so that the entity between the upper cooling water chamber 21 and the upper cooling oil chamber 22 forms a thin-wall structure, and the upper cooling oil chamber 22 and the chain chamber 4 are respectively located at two, the upper cooling oil cavity 22 is arranged in an arc shape along the circumferential direction of the upper cooling water cavity 21, one end of the upper cooling oil cavity 22 is further provided with an oil inlet channel 23 extending upwards, the upper end of the oil inlet channel 23 penetrates through the valve chamber 26 and forms an oil inlet 231, the oil inlet channel 23 is positioned on the outer side of the upper cooling water cavity 21, as shown in a combined figure 4, the cylinder body 1 is internally provided with a lower cooling oil cavity 12, the lower cooling oil cavity 12 is positioned on the outer side of the lower cooling water cavity 11, so that an entity between the lower cooling water cavity 11 and the lower cooling oil cavity 12 forms a thin-wall structure, the upper cooling oil cavity 22 is communicated with the lower cooling oil cavity 12, and the lower cooling oil cavity.

Referring to fig. 5, the lower cooling oil chamber 12 is arranged in an arc shape along the circumferential direction of the lower cooling oil chamber 11, one end of the lower cooling oil chamber 12 in the circumferential direction is communicated with the chain chamber 4 through an oil outlet 13, the other end of the lower cooling oil chamber is close to the chain chamber 4, the oil outlet 13 is located on the cylinder body 1, one end of the lower cooling oil chamber 12 is communicated with one end of the lower cooling oil chamber 12, the other end of the lower cooling oil chamber is communicated with the chain chamber 4, a diversion convex portion 14 is further arranged on the top surface of the end of the lower cooling oil chamber 12 connected with the oil outlet 13, the diversion convex portion 14 is provided with a diversion surface 141 protruding in a downward arc shape, the higher end of the diversion surface 141 is connected with. The oil outlet hole 13 has a partition 131 therein, and the partition 131 partitions the oil outlet hole 13 into upper and lower portions. Referring to FIGS. 6 and 7, a plurality of upper oil through holes 24 are formed in the lower end surface of the cylinder head 2, the upper oil through holes 24 are communicated with the upper cooling gallery 22, a plurality of lower oil through holes 15 are formed in the upper end surface of the cylinder body 1, the lower oil through holes 15 are communicated with the lower cooling gallery 12, the upper oil through holes 24 are opposite to the lower oil through holes 15 and are communicated with the lower cooling gallery 11, a plurality of upper water through holes 25 are formed in the lower end surface of the cylinder head 2, the upper water through holes 25 are communicated with the upper cooling gallery 21, a plurality of lower water through holes 16 are formed in the upper end surface of the cylinder body 1, the lower water through holes 16 are communicated with the lower cooling gallery 11, the upper water through holes 25 are opposite to the lower water through holes 16 and are communicated with the lower water through holes 16, the upper water through holes 25, the upper oil through holes 24, the lower water through holes 16 and the lower oil through holes 15 have an arc-shaped cross section, and the upper water through holes 25 and, the upper oil passing hole 24 is adjacent to the upper water passing hole 25 and located outside the upper water passing hole 25, and the lower oil passing hole 15 is adjacent to the lower water passing hole 16 and located outside the lower water passing hole 16.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms cylinder block 1, lower cooling water chamber 11, lower cooling oil chamber 12, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The cooling structure of the motorcycle engine comprises a cylinder body (1) and a cylinder head (2) fixed on the cylinder body (1), wherein a combustion chamber (3) and a chain chamber (4) located on one side of the combustion chamber (3) are formed between the cylinder body (1) and the cylinder head (2), the cooling structure comprises an upper cooling water cavity (21) located in the cylinder head (2) and arranged around the combustion chamber (3), and the cooling structure is characterized in that an upper cooling oil cavity (22) is further arranged in the cylinder head (2), the upper cooling oil cavity (22) is communicated with the chain chamber (4), the upper cooling oil cavity (22) is located on the outer side of the upper cooling water cavity (21), and the upper cooling oil cavity (22) and the chain chamber (4) are located on two sides of the upper cooling water cavity (21) respectively.

2. A cooling structure of a motorcycle engine as set forth in claim 1, wherein said upper cooling oil chamber (22) is provided in an arc shape along a circumferential direction of the upper cooling water chamber (21).

3. A cooling structure of a motorcycle engine as set forth in claim 2, wherein the cylinder head (2) has a valve chamber (26) therein, the upper cooling water chamber (21) has an oil feed passage (23) extending upward at one end thereof, and an upper end of the oil feed passage (23) penetrates the valve chamber (26) and forms an oil inlet (231).

4. A cooling structure of a motorcycle engine as set forth in claim 1, 2 or 3, characterized in that a lower cooling water chamber (11) is provided in the cylinder block (1) around the combustion chamber (3), the lower cooling water chamber (11) is communicated with an upper cooling water chamber (21), a lower cooling oil chamber (12) is further provided in the cylinder block (1), the upper cooling oil chamber (22) is communicated with the chain chamber (4) through the lower cooling oil chamber (12), and the lower cooling oil chamber (12) is located outside the lower cooling water chamber (11).

5. A cooling structure of a motorcycle engine as set forth in claim 4, wherein the lower cooling oil chamber (12) is provided in an arc shape along the circumferential direction of the lower cooling water chamber (11), and one end of the lower cooling oil chamber (12) in the circumferential direction is communicated with the chain chamber (4) and the other end is close to the chain chamber (4).

6. A cooling structure of motorcycle engine as claimed in claim 5, characterized in that the side wall of the chain chamber (4) is opened with an oil outlet hole (13), the oil outlet hole (13) is located on the cylinder block (1) and communicates with one end of the lower cooling oil chamber (12).

7. The cooling structure of motorcycle engine as claimed in claim 6, wherein the lower cooling oil chamber (12) has a flow guiding protrusion (14) on the top surface of the end connected to the oil outlet (13), the flow guiding protrusion (14) has a flow guiding surface (141) protruding downward in an arc shape, and the higher end of the flow guiding surface (141) is connected to the top surface of the lower cooling oil chamber (12) and the lower end is connected to the upper hole wall of the oil outlet (13).

8. A cooling structure of a motorcycle engine as set forth in claim 6 wherein a partition (131) is provided in the oil outlet hole (13), the partition (131) dividing the oil outlet hole (13) into upper and lower portions.

9. A cooling structure of a motorcycle engine according to claim 4, characterized in that a plurality of upper oil passing holes (24) are formed on the lower end surface of the cylinder head (2), the plurality of upper oil passing holes (24) are communicated with the upper cooling oil chamber (22), a plurality of lower oil passing holes (15) are formed on the upper end surface of the cylinder block (1), the plurality of lower oil passing holes (15) are communicated with the lower cooling oil chamber (12), and the plurality of upper oil passing holes (24) are opposite to and communicated with the plurality of lower oil passing holes (15).

10. The cooling structure of the motorcycle engine according to claim 9, wherein the lower end surface of the cylinder head (2) is provided with a plurality of upper water through holes (25), the upper water through holes (25) are communicated with the upper cooling water chamber (21), the upper end surface of the cylinder body (1) is provided with a plurality of lower water through holes (16), the lower water through holes (16) are communicated with the lower cooling water chamber (11), the upper water through holes (25) are opposite to and communicated with the lower water through holes (16), the upper oil through holes (24) are close to the upper water through holes (25) and located outside the upper water through holes (25), and the lower oil through holes (15) are close to the lower water through holes (16) and located outside the lower water through holes (16).