CN102121409B - Lubricating oil channel for right crankcase of engine - Google Patents

Abstract

The invention discloses a lubricating oil channel for a right crankcase of an engine. A right crankcase cover is provided with a crankcase installation hole; the bottom of the right crankcase cover is provided with a first oil groove; an oil filter is arranged on the outer side of the right crankcase cover, and is positioned below the crankcase installation hole; the oil inlet of the oil filter is communicated with the first oil groove through a second oil groove; the right crankcase cover is provided with a third oil groove; the third oil groove is communicated with the oil outlet of the oil filter through the second oil channel and the first oil channel; the crankcase installation hole is communicated with the third oil groove through the third oil channel and a first oil hole; and the third oil groove is communicated with an oil spray hole formed on the upper part of the right crankcase cover through a fourth oil channel and a second oil hole. The lubricating oil channel has a simple and novel structure, and has the advantages of being capable of enhancing flexibility and reliability of each component oil channel in the right crankcase, ensuring circular flow smoothness of lubricating oil, and improving lubricating effect.

Description

Lubricating oil circuit for engine right crankcase

technical field

The invention belongs to the technical field of engines, and in particular relates to a lubricating oil circuit of a right crankcase of an engine.

Background technique

General-purpose motorcycle engines store lubricating oil for the lubrication and cooling system in the crankcase of the engine, and the oil pump in the crankcase sends the lubricating oil through the crankcase and the oil passages inside the engine to the crankshaft and cylinder bore respectively. , piston, cylinder head cam and rocker arm or rocker arm and push rod, main and auxiliary shafts, bearings, gears, etc., to achieve the purpose of lubricating the engine. Generally speaking, the method of internal oil passage lubrication requires the engine crankcase to have sufficient volume and lubricating oil capacity specified for engines with different displacements. Lubrication, while also minimizing the volume of the engine crankcase, a crankcase lubricating oil circuit becomes necessary.

Contents of the invention

The technical problem to be solved by the present invention is to provide a lubricating oil passage for the engine right crankcase with good lubricating effect.

The technical scheme of the present invention is as follows: a lubricating oil passage of the right crankcase of the engine, comprising a right crankcase cover, on which a crankshaft mounting hole is arranged, the main points of which are: at the bottom of the right crankcase cover, there is The first oil tank, an oil filter is installed on the outside of the right crankcase cover, the oil filter is located below the crankshaft mounting hole, and the oil inlet of the oil filter is connected to the first oil tank through the second oil tank. The oil grooves communicate with each other; a third oil groove is opened on the right crankcase cover, and the third oil groove communicates with the oil outlet of the oil filter through the second oil passage and the first oil passage; the crankshaft mounting hole passes through The third oil passage and the first oil hole communicate with the third oil groove, and when the crankshaft is installed in the crankshaft installation hole, the lubricating oil in the third oil groove passes through the first oil hole and the third oil passage Entering the oil hole on the crankshaft, the lubricating oil lubricates the connecting rod big end bearing installed on the crankshaft through the internal oil passage of the crankshaft; the third oil groove passes through the fourth oil passage and the second oil hole and sets The oil injection holes on the upper part of the right crankcase cover communicate, and when the cylinder head is installed on the upper end of the right crankcase cover, the lubricating oil in the third oil groove passes through the third oil passage, the second oil hole and the The oil injection hole lubricates the cylinder head and the valve cam.

With the above structure, the lubricating oil after primary filtration enters from the first oil tank, enters the second oil tank, and then enters the oil inlet of the oil filter, and the lubricating oil that passes through the fine filter of the oil filter is filtered through the same engine oil The through hole in the center of the oil filter joint connected to the oil outlet of the oil filter enters the first oil passage, and then enters the third oil groove through the second oil passage; the lubricating oil entering the third oil groove, a branch passes through the fourth oil passage, the second oil passage The oil hole enters the oil injection hole to provide cooling and lubricating oil for the cylinder head and the gas distribution cam, and the other branch passes through the first oil hole and enters the third oil passage, and the lubricating oil in the third oil passage enters the oil hole of the crankshaft , lubricate the connecting rod big end bearing installed on the crankshaft through the internal oil passage of the crankshaft, and the above structure can effectively lubricate and cool the various components in the crankcase well.

A balance shaft installation chamber is provided on the right crankcase cover, the balance shaft installation chamber is located on the left side of the crankshaft installation hole, the third oil passage communicates with the balance shaft installation chamber through the fifth oil passage, When the balance shaft bearing is installed in the balance shaft installation chamber, the lubricating oil in the third oil passage lubricates the balance shaft bearing through the fifth oil passage; the balance shaft installation chamber communicates with the balance shaft bearing through the sixth oil passage. The crankshaft mounting hole is communicated with each other, and the lubricating oil in the balance shaft mounting chamber lubricates the crankshaft bearing installed in the crankshaft mounting hole through the sixth oil passage. With the above structure, part of the lubricating oil entering the third oil passage lubricates the balance shaft bearing installed in the balance shaft installation chamber through the fifth oil passage, and then lubricates the crankshaft bearing through the sixth oil passage.

The first oil passage is perpendicular to the outer surface of the right crankcase cover, and the outer end of the first oil passage passes through the outer surface of the right crankcase cover, and a filter joint is installed at the outer end of the first oil passage, The inner end of the filter joint is threadedly connected with the first oil passage, and the outer end is threadedly connected with the oil filter. With the above structure, installing the filter joint can realize the reliable installation of the oil filter, so that the lubricating oil entering the crankcase can be well filtered, preventing the impurities of the lubricating oil from damaging the components in the crankcase, and at the same time improving Lubricating effect.

In order to prevent the lubricating oil entering the right crankcase cover from leaking from the oil filter, the inner end of the oil filter is close to the outer surface of the right crankcase cover, between the oil filter and the right crankcase cover There is a sealing surface between them.

Two oil seals are installed in the crankshaft installation hole, the two oil seals are set on the crankshaft, and the two oil seals are respectively located on both sides of the third oil passage, the above structure can make the lubrication The oil enters the oil hole of the crankshaft well and enters the oil passage of the crankshaft.

The right end of the fourth oil passage passes through the right side wall of the right crankcase cover, and a first plug is installed at the right end of the fourth oil passage. The above structure can facilitate the processing of the fourth oil passage.

The right end of the third oil passage passes through the right side wall of the right crankcase cover, and a second plug is installed at the right end of the third oil passage. The above structure can facilitate the processing of the third oil passage.

Beneficial effects: the structure of the present invention is simple and novel, can improve the sensitivity and reliability of the oil passages of various components in the right crankcase, ensure the smooth circulation of lubricating oil, and improve the lubricating effect; it has the advantages of ingenious design, simple structure, and low modification cost Low, good lubrication effect and so on.

Description of drawings

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

Fig. 2 is the back view of Fig. 1;

Fig. 3 is A-A sectional view among Fig. 1;

Fig. 4 is B-B sectional view among Fig. 2;

Fig. 5 is a C-C sectional view among Fig. 1;

Fig. 6 is a working principle diagram of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

As shown in Figures 1 to 5, a lubricating oil circuit for the right crankcase of an engine is composed of a right crankcase cover 1, a crankshaft mounting hole 2, and an oil filter 4, among which the right crankcase cover 1, the crankshaft mounting hole 2. The oil filter 4 and the balance shaft installation chamber 16 all have existing structures, which will not be repeated here. A crankshaft installation hole 2 is provided on the right crankcase cover 1, and a crankshaft installation hole 2 is arranged on the bottom of the right crankcase cover 1. There is a first oil tank 3, and an oil filter 4 is installed on the outside of the right crankcase cover 1. The oil filter 4 is located below the crankshaft mounting hole 2, and the oil inlet of the oil filter 4 passes through The second oil groove 5 communicates with the first oil groove 3; a third oil groove 6 is formed on the right crankcase cover 1, and the third oil groove 6 is located on the right side of the crankshaft installation chamber 2 and the oil filter 4 , the third oil groove 6 communicates with the oil outlet of the oil filter 4 through the second oil passage 8 and the first oil passage 7; the crankshaft mounting hole 2 passes through the third oil passage 10 and the first oil hole 9 It communicates with the third oil groove 6, when the crankshaft 11 is installed in the crankshaft installation hole 2, the lubricating oil in the third oil groove 6 enters the said first oil hole 9 and the third oil passage 10 The oil hole on the crankshaft 11, the lubricating oil lubricates the connecting rod big end bearing 12 installed on the crankshaft 11 through the internal oil passage of the crankshaft 11; the third oil groove 6 passes through the fourth oil passage 13 and the second oil passage. The hole 14 communicates with the oil injection hole 15 arranged on the top of the right crankcase cover 1. When the cylinder head is installed on the upper end of the right crankcase cover 1, the lubricating oil in the third oil groove 6 passes through the third The oil passage 13, the second oil hole 14 and the oil injection hole 15 lubricate the cylinder head and the gas distribution cam; a balance shaft installation chamber 16 is arranged on the right crankcase cover 1, and the balance shaft installation chamber 16 is located in the On the left side of the crankshaft installation hole 2, the third oil passage 10 communicates with the balance shaft installation chamber 16 through the fifth oil passage 17. When the balance shaft bearing 18 is installed in the balance shaft installation chamber 16, the The lubricating oil in the third oil passage 10 lubricates the balance shaft bearing 18 through the fifth oil passage 17; the balance shaft installation chamber 16 communicates with the crankshaft installation hole 2 through the sixth oil passage 19, and the balance The lubricating oil in the shaft installation chamber 16 lubricates the crankshaft bearing 20 installed in the crankshaft installation hole 2 through the sixth oil passage 19 .

Please refer to Fig. 3: the first oil passage 7 is perpendicular to the outer surface of the right crankcase cover 1, and the outer end of the first oil passage 7 passes through the outer surface of the right crankcase cover 1, in the first oil passage 7 A filter joint 21 is installed at the outer end of an oil passage 7, and the inner end of the filter joint 21 is threadedly connected with the first oil passage 7, and the outer end is threaded with the oil filter 4; the oil filter The inner end of the filter 4 is close to the outer surface of the right crankcase cover 1, and a sealing surface 25 is installed between the oil filter 4 and the right crankcase cover 1.

Please refer to Fig. 4: two oil seals 22 are installed in the crankshaft mounting hole 2, and the two oil seals 22 are fitted on the crankshaft 11, and the two oil seals 22 are respectively located in the third oil passage 10 on both sides.

Please refer to Fig. 4 and Fig. 5: the right end of the fourth oil passage 13 passes through the right side wall of the right crankcase cover 1, and a first plug 23 is installed at the right end of the fourth oil passage 13; The right end of the oil passage 10 passes through the right side wall of the right crankcase cover 1 , and a second plug 24 is installed at the right end of the third oil passage 10 .

Above each oil groove, when the right crankcase cover 1 and the right crankcase body are combined, each oil groove on the right crankcase cover 1 becomes the oil passage.

As can be seen in Fig. 6: the working principle of the present invention is such: the lubricating oil after primary filtration enters from the first oil tank 3, enters the second oil tank 5, enters the oil inlet of machine oil filter 4 again, passes through Lubricating oil finely filtered by the oil filter 4 enters the first oil passage 7 through the central through hole of the oil filter joint 21 connected to the oil outlet of the oil filter 4, and then enters the third oil passage 8 through the second oil passage. Oil groove 6; lubricating oil entering the third oil groove 6, one branch passes through the fourth oil passage 13, the second oil hole 14 enters the oil injection hole 15 to provide cooling and lubricating oil to the cylinder head and the gas distribution cam, and the other branch Enter the third oil passage 10 through the first oil hole 9, and a part of the lubricating oil in the third oil passage 10 directly enters the oil hole of the crankshaft 11, and passes through the internal oil passage of the crankshaft 11 to the connection mounted on the crankshaft 11. The rod big end bearing 12 is lubricated, and the other part lubricates the balance shaft bearing 18 installed in the balance shaft installation chamber 16 through the fifth oil passage 17, and then lubricates the crankshaft bearing 20 through the sixth oil passage 19.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (7)

1. engine right crankcase lubricating oil path; Comprise right crankcase cover (1); On this right crankcase cover (1), be provided with crankshaft installed hole (2), it is characterized in that: have first oil groove (3) in said right crankcase cover (1) bottom, oil filter (4) is installed in this right crankcase cover (1) outside; This oil filter (4) is positioned at below, said crankshaft installed hole (2), and the filler opening of said oil filter (4) communicates with said first oil groove (3) through second oil groove (5); On said right crankcase cover (1), have the 3rd oil groove (6), the 3rd oil groove (6) communicates with the oil outlet of said oil filter (4) through second oil duct (8) and first oil duct (7); Said crankshaft installed hole (2) communicates with said the 3rd oil groove (6) through the 3rd oil duct (10) and first oilhole (9); When in said crankshaft installed hole (2), bent axle (11) being installed; Lubricant oil in said the 3rd oil groove (6) gets into the oilhole on the said bent axle (11) through said first oilhole (9) and the 3rd oil duct (10), and lubricant oil is lubricated the connecting rod bottom-end bearing (12) that is installed on this bent axle (11) through the inside oil duct of said bent axle (11); Said the 3rd oil groove (6) communicates with the nozzle opening (15) that is arranged on said right crankcase cover (1) top through the 4th oil duct (13) and second oilhole (14); When in said right crankcase cover (1) upper end cylinder head being installed, the lubricant oil in said the 3rd oil groove (6) is lubricated through said the 3rd oil duct (13), second oilhole (14) and nozzle opening (15) countercylinder head and valve cam.

2. a kind of engine right crankcase lubricating oil path according to claim 1; It is characterized in that: on said right crankcase cover (1), be provided with trunnion shaft installation room (16); This trunnion shaft installation room (16) is positioned at the left side in said crankshaft installed hole (2); Said the 3rd oil duct (10) communicates with said trunnion shaft installation room (16) through the 5th oil duct (17); When in said trunnion shaft installation room (16), balance shaft bearing (18) being installed, the lubricant oil in said the 3rd oil duct (10) is lubricated said balance shaft bearing (18) through the 5th oil duct (17); Said trunnion shaft installation room (16) communicates with said crankshaft installed hole (2) through the 6th oil duct (19), and the lubricant oil in this trunnion shaft installation room (16) is lubricated the crankshaft bearing of installing in the said crankshaft installed hole (2) (20) through the 6th oil duct (19).

3. a kind of engine right crankcase lubricating oil path according to claim 1; It is characterized in that: the outer surface of the vertical said right crankcase cover of said first oil duct (7) (1); And this first oil duct (7) outer end passes the outer surface of said right crankcase cover (1); Filter cleaner joint (21) is installed in said first oil duct (7) outer end, is threaded with said first oil duct (7) in that this filter cleaner joint (21) is inner, the outer end said oil filter (4) that is threaded.

4. a kind of engine right crankcase lubricating oil path according to claim 1; It is characterized in that: said right crankcase cover (1) outer surface is close in said oil filter (4) the inner, between this oil filter (4) and said right crankcase cover (1), is provided with sealing surface (25).

5. a kind of engine right crankcase lubricating oil path according to claim 1; It is characterized in that: two oil sealings (22) are installed in said crankshaft installed hole (2); These two oil sealings (22) all are sleeved on the said bent axle (11), and two said oil sealings (22) lay respectively at the both sides of said the 3rd oil duct (10).

6. a kind of engine right crankcase lubricating oil path according to claim 1 is characterized in that: said the 4th oil duct (13) right-hand member passes the right side wall of said right crankcase cover (1), at the 4th oil duct (13) right-hand member first plug (23) is housed.

7. a kind of engine right crankcase lubricating oil path according to claim 1 is characterized in that: said the 3rd oil duct (10) right-hand member passes the right side wall of said right crankcase cover (1), at the 3rd oil duct (10) right-hand member second plug (24) is housed.

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