CVT cooling system of engine, engine and motorcycle

Abstract

The CVT cooling system of the engine comprises a CVT, a left crankcase body and a left crankcase cover, a CVT cavity is formed between the left crankcase body and the left crankcase cover, the CVT is assembled in the CVT cavity, a shoe block component of a driven wheel in the CVT is located on the side of the left crankcase body, a breathing groove outer cover plate is arranged on the left crankcase cover, and the breathing groove outer cover plate is arranged on the left crankcase cover. The breathing groove outer cover plate is provided with a first main air inlet, a second main air inlet and a first auxiliary air inlet, the left crankcase cover is provided with a filter screen assembly, the left crankcase cover is provided with a third main air inlet and a second auxiliary air inlet, the breathing groove outer cover plate is provided with blocking ribs, and part of cooling air enters a CVT cavity sequentially through the first auxiliary air inlet and the second auxiliary air inlet. In order to simplify the structure, reduce the manufacturing cost and effectively reduce the risk that muddy water enters the filter screen assembly, a blocking rib is arranged on the side, close to the filter screen assembly, of the first main air inlet of the breathing groove outer cover plate, and the muddy water is effectively prevented from being sprayed to the filter screen assembly.

Description

Technical Field

[0001] The invention relates to the technical field of a dual-cylinder CVT scooter engine, and in particular to a CVT cooling system of an engine with a shoe component of a driven wheel close to a left crankcase body. Background Art

[0002] The cooling air of the CVT of the existing engine usually enters through the cover plate on the outside of the left crankcase cover, directly passes through the filter assembly installed on the driving wheel side of the left crankcase cover, enters the CVT cavity to cool the CVT, and then is discharged from the left crankcase driven wheel away from the driving wheel side. Such a structure easily allows muddy water to enter the filter, and long-term use will cause the filter to be blocked, the air intake area to be reduced, and the CVT to be insufficiently cooled.

[0003] In order to prevent muddy water from entering the filter, an inner and outer cover plate structure is often used to separate water and gas through a maze shape to avoid clogging the filter. This structure has many parts, a complex structure, and a high cost.

[0004] Therefore, there is an urgent need for a CVT cooling system for an engine that can simplify the structure, reduce manufacturing costs, and effectively prevent the risk of muddy water entering the filter assembly. Summary of the invention

[0005] In view of this, the present invention provides a CVT cooling system for an engine, which can simplify the structure, reduce manufacturing costs, and effectively prevent the risk of mud and water entering the filter assembly; the second object of the present invention is to provide an engine including the CVT cooling system of the above-mentioned engine; the third object of the present invention is to provide a motorcycle including the CVT cooling system of the above-mentioned engine.

[0006] The present invention provides a CVT cooling system for an engine using the following technical solution:

[0007] A CVT cooling system of an engine, comprising a CVT having a shoe component of a driven wheel close to a left crankcase body side, a left crankcase body and a left crankcase cover, a CVT cavity is formed between the left crankcase body and the left crankcase cover, the CVT is assembled in the CVT cavity, a breathing groove outer cover is arranged on the left crankcase cover and located outside the filter assembly, the breathing groove outer cover has a main air inlet 1, a main air inlet 2 and an auxiliary air inlet 1, the left crankcase cover is arranged outside the main air inlet 3 for filtering air entering the CVT cavity The filter assembly for cooling air, the left crankcase cover is provided with a main air inlet three and an auxiliary air inlet two, the main air inlet three is in circulation with the CVT cavity, and a retaining rib matching the mounting surface of the filter assembly is provided on the outer side of the main air inlet one on the outer cover plate of the breathing groove, the retaining rib is used to prevent mud and water from entering the filter assembly, a part of the cooling air enters the CVT cavity through the auxiliary air inlet one and the auxiliary air inlet two in turn, and the other part of the cooling air enters the CVT cavity through the main air inlet one, the main air inlet two and the main air inlet three in turn.

[0008] Optionally, the retaining ribs include retaining rib 1 and retaining rib 2 arranged on the left crankcase cover, a driven wheel is arranged on the left crankcase body, the retaining ribs 1 and 2 are concentric with the driven wheel and the inner radius of retaining rib 1 and retaining rib 2 is greater than the running radius of the driven wheel.

[0009] Optionally, the driven wheel is located on the side of the CVT cavity away from the main air inlet three and is provided with a shoe component close to the left crankcase side. A part of the cooling air of the CVT rotates to the cooling shoe component as the driven wheel rotates and then flows out from the air outlet one through the drainage ribs.

[0010] Optionally, a driving wheel is provided on the left crankcase, the left crankcase has drainage ribs, and the second retaining rib is provided on the side of the left crankcase cover away from the driving wheel and is provided corresponding to the drainage ribs.

[0011] Optionally, the left crankcase has air outlet one and air outlet two, and air outlet one is formed between the drainage rib and the CVT cavity wall. When the CVT rotates counterclockwise, a part of the cooling air of the CVT flows out from air outlet one along the drainage rib, and a part of the cooling air of the CVT rotates to the shoe block component along with the rotation of the driven wheel and then flows out from air outlet one through the drainage rib. The cooling air of the CVT flowing out of air outlet one flows out from air outlet two.

[0012] Optionally, the left crankcase has air outlet one and air outlet two, and air outlet one is formed between the drainage rib and the CVT cavity wall. When the CVT rotates counterclockwise, a part of the cooling air of the CVT flows out from air outlet one along the drainage rib, and a part of the cooling air of the CVT rotates to the shoe block component along with the rotation of the driven wheel and then flows out from air outlet one through the drainage rib. The cooling air of the CVT flowing out of air outlet one flows out from air outlet two.

[0013] Optionally, the left crankcase cover is provided with a mounting boss, the filter assembly is arranged on the mounting boss, and a water groove is provided on the left crankcase cover and located between the main air inlet three and the auxiliary air inlet two, and foreign matter in the cooling air passing through the main air inlet one flows out through the water groove.

[0014] Optionally, a retaining rib three is arranged on the outer cover plate of the breathing groove, which is located on the side of the main air inlet 1 close to the driving wheel and cooperates with the mounting boss.

[0015] Optionally, a sealing groove is provided on the filter assembly, a sealing strip is provided in the sealing groove, a retaining rib four is provided on the outer cover plate of the breathing groove, the sealing strip is used to fill the gap between the retaining rib four and the filter assembly, a main air inlet two is formed between the retaining rib four and the filter assembly, the main air inlet two is located in the upper and middle part between the driving wheel and the driven wheel, and a main air inlet two is formed between the retaining rib four and the filter assembly.

[0016] In order to achieve the above-mentioned second purpose, the present invention also provides an engine, which includes the CVT cooling system of any one of the above-mentioned engines. Since the CVT cooling system of the above-mentioned engine has the above-mentioned technical effects, the engine having the CVT cooling system of the engine should also have the corresponding technical effects.

[0017] In order to achieve the above-mentioned third purpose, the present invention also provides a motorcycle, which includes the above-mentioned engine. Since the CVT cooling system of the above-mentioned engine has the above-mentioned technical effects, the motorcycle with the CVT cooling system of the engine should also have corresponding technical effects.

[0018] To summarize, the present invention includes at least one of the following beneficial technical effects: in order to simplify the structure, reduce manufacturing costs, and effectively reduce the risk of mud and water entering the filter assembly, a retaining rib that cooperates with the mounting surface of the left crankcase cover filter assembly is provided on the side of the main air inlet of the outer cover plate of the breathing groove close to the filter assembly, thereby effectively preventing mud and water from being sprayed onto the filter assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the positions of the components of the CVT cooling system according to an embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of the positions of air inlets and outlets of a CVT cooling system according to an embodiment of the present invention;

[0021] Figure 3 is a schematic structural diagram of a left crankcase according to an embodiment of the present invention;

[0022] Figure 4 is a schematic structural diagram of a left crankcase cover according to an embodiment of the present invention;

[0023] Figure 5 2 is a schematic diagram of the structure of the outer cover plate of the breathing slot according to an embodiment of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the filter assembly according to an embodiment of the present invention.

[0025] Explanation of the reference numerals in the accompanying drawings: 1. Left crankcase; 1a. Drainage rib; 1b. Air outlet one; 2. Driving wheel; 3. Left crankcase cover; 3a. Main air inlet three; 3b. Water trough; 3c. Retaining wall; 3d. Auxiliary air inlet two; 3e. Mounting boss; 3f. Retaining rib one; 3g. Retaining rib two; 4. Filter assembly; 4a. Sealing groove; 5. Sealing strip; 6. Breathing groove outer cover; 6a. Retaining rib three; 6b. Retaining rib four; 7. CVT chamber; 8. Driven wheel; 9. Belt; 10. Shoe component; 11. Main air inlet one; 12. Auxiliary air inlet one; 13. Air outlet two; 14. Main air inlet two. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-6 The present invention is described in further detail.

[0027] An embodiment of the present invention discloses a CVT cooling system of an engine.

[0028] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6A CVT cooling system of an engine comprises a CVT having a shoe component of a driven wheel close to a left crankcase body side, a left crankcase body 1 and a left crankcase cover 3, a CVT chamber 7 is formed between the left crankcase body 1 and the left crankcase cover 3, the CVT is assembled in the CVT chamber 7, a breathing groove outer cover plate 6 is arranged on the left crankcase cover 3 and located on the outside of a filter assembly 4, the breathing groove outer cover plate 6 has a main air inlet 11, a main air inlet 2 14 and an auxiliary air inlet 1 12, the left crankcase cover 3 is located on the outside of the main air inlet 3 3a and is provided with a filter assembly 4 for filtering cooling air entering the CVT chamber 7, a main air inlet 3 3a and an auxiliary air inlet 2 3d are arranged on the left crankcase cover 3, the main air inlet 3 3a is in circulation with the CVT chamber 7, the breathing groove outer cover plate 6 A retaining rib 3 6a that cooperates with the mounting surface of the filter assembly 4 is arranged on the outer side of the main air inlet 11, and the retaining rib 3 6a is used to prevent mud and water from entering the filter assembly 4. A part of the cooling air enters the CVT cavity 7 through the auxiliary air inlet 12 and the auxiliary air inlet 2 3d in turn, and the other part of the cooling air enters the CVT cavity 7 through the main air inlet 11, the main air inlet 2 14 and the main air inlet 3a in turn. In order to simplify the structure, reduce the manufacturing cost, and effectively reduce the risk of mud and water entering the filter assembly 4, a retaining rib 3 6a that cooperates with the mounting surface of the filter assembly 4 of the left crankcase cover 3 is arranged on the side of the main air inlet 11 of the breathing groove outer cover 6 close to the filter assembly 4, which effectively blocks mud and water from being sprayed onto the filter assembly 4, thereby improving the cooling effect of the CVT.

[0029] In this embodiment, the CVT of the engine is assembled in the CVT chamber 7 formed between the left crankcase 1 and the left crankcase cover 3. In order to ensure the cooling of the CVT, the main air inlet 3a is arranged on the left crankcase cover 3 near the center of the driving wheel 2, and the auxiliary air inlet 2 3d is arranged on the lower side of the middle of the CVT, which is beneficial to increase the air intake volume and is more conducive to the cooling of the belt 9 and the shoe component 10 on the clutch driven wheel 8.

[0030] The baffle ribs include baffle rib 1 3f and baffle rib 2 3g which are arranged on the left crankcase cover 3. A driven wheel 8 is arranged on the left crankcase body 1. Baffle rib 1 3f and baffle rib 2 3g are concentric with the driven wheel 8 and the inner radius of baffle rib 1 3f and baffle rib 2 3g is larger than the running radius of the driven wheel 8. Baffle rib 1 3f and baffle rib 2 3g are located on the outer periphery of the driven wheel 8 on the CVT chamber 7 side. The setting of baffle rib 1 3f and baffle rib 2 3g guides the cooling air on the side of the left crankcase cover 3 to the side of the left crankcase body 1, so as to better cool the belt 9 and shoe component 10 in the CVT chamber 7.

[0031] The driven wheel 8 is located on the side of the CVT chamber 7 away from the main air inlet 3a and is provided with a shoe component 10 close to the left crankcase side. A part of the CVT cooling air rotates along with the rotation of the driven wheel 8 to the cooling shoe component 10 and then flows out from the air outlet 1b through the drainage rib 1a.

[0032] The left crankcase 1 is provided with an air outlet 1b and an air outlet 2 13. The air outlet 1b is formed between the drainage rib 1a and the wall of the CVT chamber 7. When the CVT rotates counterclockwise, a part of the cooling air of the CVT flows out from the air outlet 1b along the drainage rib 1a, and a part of the cooling air of the CVT rotates to the shoe component 10 along with the rotation of the driven wheel 8 and then flows out from the air outlet 1b through the drainage rib 1a. The cooling air of the CVT flowing out of the air outlet 1b flows out from the air outlet 2 13.

[0033] A driving wheel 2 is provided on the left crankcase 1, a belt 9 is provided between the driving wheel 2 and the driven wheel 8, the left crankcase 1 has a drainage rib 1a, and a retaining rib 3g is provided on the side of the left crankcase cover 3 away from the driving wheel 2 and corresponding to the drainage rib 1a, so as to introduce cooling air into the shoe component 10 side of the driven wheel 8 (close to the left crankcase 1 side) as much as possible, which is more conducive to the cooling of the belt 9 and the shoe component 10.

[0034] A retaining wall 3c is provided on the left crankcase cover 3 on the side of the auxiliary air inlet 2 3d close to the main air inlet 3a. The retaining wall 3c is used to separate debris in the cooling air entering from the auxiliary air inlet 12. The cooling air passes through the auxiliary air inlet 12 and hits the retaining wall 3c, then enters the CVT chamber 7 through the auxiliary air inlet 2 3d, which can effectively separate debris from the cooling air entering from the auxiliary air inlet 1 of the breathing groove outer cover 6, thereby ensuring the quality of the cooling air entering the CVT chamber 7.

[0035] In this embodiment, a filter assembly 4 is arranged outside the main air inlet 3a of the left crankcase cover 3 (away from the CVT chamber 7 side) to filter the cooling air entering the CVT chamber 7. In this embodiment, the filter assembly 4 adopts the foam filter assembly 4 of the prior art, and the breathing groove outer cover plate 6 is located outside the left crankcase cover 3 and the filter assembly 4.

[0036] The left crankcase cover 3 is provided with a mounting boss 3e, and the filter assembly 4 is arranged on the mounting boss 3e. A water groove 3b is provided on the left crankcase cover 3 and between the main air inlet three 3a and the auxiliary air inlet two 3d. The water groove 3b is lower than the mounting boss 3e and the mounting surface of the filter assembly. Foreign matter in the cooling air through the main air inlet one 11 flows out through the water groove 3b. The mounting boss 3e is designed to be higher than the water groove 3b, which can effectively make the muddy water flow out along the water groove 3b.

[0037] A retaining rib 3 6a is provided on the outer cover plate 6 of the breathing groove, located on the side of the main air inlet 11 close to the driving wheel 2 and cooperates with the mounting boss 3e. The retaining rib 3 6a is used to prevent muddy water entering from the main air inlet 11 from splashing onto the filter assembly 4.

[0038] The filter assembly 4 is provided with a sealing groove 4a, a sealing strip 5 is provided in the sealing groove 4a, and a retaining rib 45b is provided on the outer cover plate 6 of the breathing groove. The sealing strip 5 is used to fill the gap between the retaining rib 45b and the filter assembly 4. At the main air inlet 3a of the left crankcase cover 3, the retaining rib 45b is provided at the corresponding position of the sealing groove 4a on the filter assembly 4, and the sealing strip 5 in the sealing groove 4a of the filter assembly 4 is compressed and assembled to achieve the sealing of the periphery of the air inlet and effectively prevent the entry of foreign matter.

[0039] The second main air inlet 14 is located in the upper middle part between the driving wheel 2 and the driven wheel 8 , and is formed between the retaining rib 4 5 b and the filter assembly 4 .

[0040] After entering from the main air inlet 11 of the outer cover plate 6 of the breathing groove, the muddy water in the cooling air flows out through the water groove 3b on the left crankcase cover 3, and the filtered cooling air enters the sealed chamber formed by the sealing strip 5 from the main air inlet 2 14 designed in cooperation with the retaining rib 4 5b of the outer cover plate 6 of the breathing groove and the sealing strip 5 installation groove of the filter assembly 44, and then enters the CVT chamber 7 from the main air inlet 3 3a of the left crankcase cover 3 through the filter assembly 4.

[0041] After entering from the auxiliary air inlet 12 of the breathing groove outer cover 6, it hits the retaining wall 3c of the left crankcase cover 3. After the collision, foreign objects flow out from the gap below the breathing groove outer cover 6 and the left crankcase cover 3. The cooling air enters the CVT cavity 7 from the auxiliary air inlet 2 3d of the left crankcase cover 3, and cools the CVT together with the cooling air entering from the main air inlet.

[0042] In order to simplify the structure, reduce the manufacturing cost, and effectively reduce the risk of muddy water entering the filter assembly 4, the present invention provides a retaining rib matched with the mounting surface of the filter assembly 4 of the left crankcase cover 3 on the main air inlet 11 of the breathing groove outer cover 6 near the filter assembly 4, effectively preventing muddy water from spraying onto the filter assembly 4; at the same time, between the main air inlet 11 and the filter assembly 4, a water groove 3b lower than the mounting surface of the filter assembly 4 is provided on the left crankcase cover 3. Between the breathing groove outer cover 6 and the filter assembly 4, a sealing strip 5 is provided between the retaining rib 45b on the breathing groove outer cover 6 and the sealing groove 4a on the filter assembly 4, so as to achieve the sealing of the periphery of the air inlet and effectively prevent the entry of foreign matter.

[0043] In order to make the CVT cool more fully and last longer, the present invention sets an auxiliary air inlet 3d on the lower side of the middle part of the CVT of the left crankcase cover 3. By hitting the retaining wall 3c of the left crankcase cover 3, muddy water or foreign matter flows out through the lower part after hitting, and the filtered cooling air enters the CVT chamber 7 through the auxiliary air inlet 3d on the left crankcase cover 3, and cools the CVT together with the cooling air from the main air inlet 11, so that the cooling of the CVT is more sufficient.

[0044] The present invention also provides an engine, which includes the CVT cooling system of the engine. Since the motorcycle adopts all the above technical solutions, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0045] The present invention also provides a motorcycle, which includes the above engine. Since the engine adopts all the above technical solutions, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A CVT cooling system for an engine, characterized in that: The invention comprises a CVT having a shoe component of a driven wheel close to the left crankcase body side, a left crankcase body and a left crankcase cover, a CVT cavity is formed between the left crankcase body and the left crankcase cover, the CVT is assembled in the CVT cavity, a breathing groove outer cover is arranged on the left crankcase cover and located on the outside of the filter assembly, the breathing groove outer cover has a main air inlet 1, a main air inlet 2 and an auxiliary air inlet 1, and the left crankcase cover is arranged on the outside of the main air inlet 3 with a filter assembly for filtering the cooling air entering the CVT cavity Part, a main air inlet three and an auxiliary air inlet two are provided on the left crankcase cover, the main air inlet three is in communication with the CVT cavity, a retaining rib matching the mounting surface of the filter assembly is provided on the outer side of the main air inlet one on the outer cover plate of the breathing groove, the retaining rib is used to prevent mud and water from entering the filter assembly, a part of the cooling air enters the CVT cavity through the auxiliary air inlet one and the auxiliary air inlet two in sequence, and another part of the cooling air enters the CVT cavity through the main air inlet one, the main air inlet two and the main air inlet three in sequence.

2. The CVT cooling system of the engine according to claim 1, characterized in that: The retaining ribs include retaining rib 1 and retaining rib 2 which are arranged on the left crankcase cover. A driven wheel is arranged on the left crankcase body. The retaining ribs 1 and 2 are concentric with the driven wheel and the inner radius of the retaining ribs 1 and 2 is greater than the running radius of the driven wheel.

3. The CVT cooling system of the engine according to claim 2, characterized in that: The driven wheel is located on the side of the CVT cavity away from the main air inlet three and is provided with a shoe component close to the left crankcase side. A part of the CVT cooling air rotates to the cooling shoe component as the driven wheel rotates, and then flows out from the air outlet one through the drainage ribs.

4. The CVT cooling system of the engine according to claim 3, characterized in that: The left crankcase is provided with a driving wheel, and the left crankcase has drainage ribs. The second retaining rib is arranged on the side of the left crankcase cover away from the driving wheel and is arranged corresponding to the drainage ribs.

5. The CVT cooling system of the engine according to claim 4, characterized in that: The left crankcase is provided with air outlet one and air outlet two, and air outlet one is formed between the drainage rib and the CVT cavity wall. When the CVT rotates counterclockwise, a part of the cooling air of the CVT flows out from air outlet one along the drainage rib, and a part of the cooling air of the CVT rotates to the shoe component along with the rotation of the driven wheel and then flows out from air outlet one through the drainage rib. The cooling air of the CVT flowing out of air outlet one flows out from air outlet two.

6. The CVT cooling system of the engine according to claim 1, characterized in that: A baffle wall is provided on the left crankcase cover on the side of the auxiliary air inlet 2 close to the main air inlet 2. The baffle wall is used to separate debris in the cooling air entering from the auxiliary air inlet 1. The cooling air passes through the auxiliary air inlet 1 and hits the baffle wall before entering the CVT cavity through the auxiliary air inlet 2.

7. The CVT cooling system of the engine according to claim 1, characterized in that: The left crankcase cover is provided with a mounting boss, the filter assembly is arranged on the mounting boss, and a water groove is provided on the left crankcase cover and between the main air inlet three and the auxiliary air inlet two, and foreign matter in the cooling air passing through the main air inlet one flows out through the water groove.

8. The CVT cooling system of the engine according to claim 7, characterized in that: The outer cover plate of the breathing groove is located on the side of the main air inlet 1 close to the driving wheel and is provided with a retaining rib 3 in cooperation with the mounting boss.

9. The CVT cooling system of the engine according to claim 4, characterized in that: The filter assembly is provided with a sealing groove, a sealing strip is provided in the sealing groove, a retaining rib four is provided on the outer cover plate of the breathing groove, the sealing strip is used to fill the gap between the retaining rib four and the filter assembly, and a main air inlet two is formed between the retaining rib four and the filter assembly, and the main air inlet two is located in the upper middle part between the driving wheel and the driven wheel.

10. An engine, characterized in that: The engine is equipped with a CVT cooling system for an engine as claimed in any one of claims 1 to 9.

11. A motorcycle, characterized in that: The motorcycle is equipped with the engine as claimed in claim 10.

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