阅读说明：本技术 一种发动机润滑结构 (Engine lubricating structure ) 是由 李强 李若军 于 2021-03-02 设计创作，主要内容包括：本发明提供了一种发动机润滑结构,包括缸体,缸体内滑动连接有活塞,活塞上铰接有连杆,活塞上端侧部开设有第一油槽,第一油槽连接有开设在活塞内部的第一油路,活塞上滑动连接有第一滑动杆,第一滑动杆一端设有能够封堵第一油路的第一堵头,活塞下端侧部开设有第二油槽,第二油槽连接有开设在活塞内部的第二油路,活塞上滑动连接有第二滑动杆,第二滑动杆一端设有能够封堵第二油路的第二堵头。当活塞从上向下运动时,第二油槽释放的润滑油粘连在缸体上,提高活塞上部与缸体之间的润滑效果；当活塞从下向上运动时,第一油槽释放的润滑油粘连在缸体上,提高活塞下部与缸体之间的润滑效果。(The invention provides an engine lubricating structure which comprises a cylinder body, wherein a piston is connected in the cylinder body in a sliding manner, a connecting rod is hinged on the piston, a first oil groove is formed in the side part of the upper end of the piston, the first oil groove is connected with a first oil way arranged in the piston, a first sliding rod is connected on the piston in a sliding manner, a first plug capable of plugging the first oil way is arranged at one end of the first sliding rod, a second oil groove is formed in the side part of the lower end of the piston, the second oil groove is connected with a second oil way arranged in the piston, a second sliding rod is connected on the piston in a sliding manner, and a second plug capable of plugging the second oil way is arranged. When the piston moves from top to bottom, the lubricating oil released by the second oil groove is adhered to the cylinder body, so that the lubricating effect between the upper part of the piston and the cylinder body is improved; when the piston moves from bottom to top, the lubricating oil released by the first oil groove is adhered to the cylinder body, so that the lubricating effect between the lower part of the piston and the cylinder body is improved.)

1. The utility model provides an engine lubrication structure, includes cylinder body (1), sliding connection has piston (3) in cylinder body (1), it has connecting rod (5), its characterized in that to articulate on piston (3):

a first oil groove (12) is formed in the side portion of the upper end of the piston (3), the first oil groove (12) is connected with a first oil path formed in the piston (3), a first sliding rod (37) is connected onto the piston (3) in a sliding mode, a first plug (29) capable of plugging the first oil path is arranged at one end of the first sliding rod (37), the other end of the first sliding rod (37) extends out of the lower end of the piston (3), and a first sliding rod spring (39) is arranged between the first sliding rod (37) and the piston (3);

a second oil groove (13) is formed in the side portion of the lower end of the piston (3), the second oil groove (13) is connected with a second oil path formed in the piston (3), a second sliding rod (38) is connected to the piston (3) in a sliding mode, a second plug (30) capable of plugging the second oil path is arranged at one end of the second sliding rod (38), the other end of the second sliding rod (38) extends out of the lower end of the piston (3), and a second sliding rod spring (41) is arranged between the second sliding rod (38) and the piston (3);

the first oil path and the second oil path are both connected with a lubricating oil supply device, one side of the connecting rod (5) is provided with a first protruding part (19) capable of contacting with a first sliding rod (37), and the other side of the connecting rod (5) is provided with a second protruding part (20) capable of contacting with a second sliding rod (38).

2. The engine lubricating structure according to claim 1, characterized in that:

the first oil path comprises a first switching channel (27) connected with the first oil groove (12) and a first transverse channel (25) which is positioned above the first switching channel (27) and connected with the lubricating oil supply device, a first conical channel (31) is arranged between the first switching channel (27) and the first transverse channel (25), the first sliding rod (37) penetrates through the first conical channel (31), and the shape of the first plug (29) corresponds to that of the first conical channel (31);

the second oil path comprises a second switching channel (28) connected with the second oil groove (13) and a second transverse channel (26) located above the second switching channel (28) and connected with the lubricating oil supply device, a second conical channel (32) is arranged between the second switching channel (28) and the second transverse channel (26), the second sliding rod (38) penetrates through the second conical channel (32), and the shape of the second plug (30) corresponds to that of the second conical channel (32).

3. The engine lubricating structure according to claim 2, characterized in that:

the first oil way further comprises a first middle channel (33) positioned on the central axis of the piston (3), the lower end of the first middle channel (33) is connected with the first transfer channel (27), and a first oil outlet channel (35) is arranged between the upper end of the first middle channel (33) and the first oil groove (12);

the second oil way further comprises a second middle channel (34) located on the central axis of the piston (3), the upper end of the second middle channel (34) is connected with a second switching channel (28), and a second oil outlet channel (36) is arranged between the lower end of the second middle channel (34) and the second oil groove (13).

4. The engine lubricating structure according to claim 2, characterized in that:

the lower end of the cylinder body (1) is provided with a crank case (2), a crankshaft is arranged in the crank case (2), and the connecting rod (5) is rotatably connected with a connecting rod journal (6) of the crankshaft;

the first transverse channel (25) is connected with a first vertical channel (23), the lower end of the first vertical channel (23) is connected with the middle part of a first transverse pipe (21), and two ends of the first transverse pipe (21) are respectively connected with a first hard pipe (15);

the second transverse channel (26) is connected with a second vertical channel (24), the lower end of the second vertical channel (24) is connected with the middle part of a second transverse pipe (22), and two ends of the second transverse pipe (22) are respectively connected with a second hard pipe (17);

first hard tube (15) and second hard tube (17) are located the both sides of bent axle respectively, and two first hard tubes (15) can be located the both sides of connecting rod (5) respectively, and two second hard tubes (17) can be located the both sides of connecting rod (5) respectively.

5. The engine lubricating structure according to claim 4, characterized in that:

a first through hole for a first hard pipe (15) to pass through is formed in the crankcase (2), a first corrugated pipe (16) is arranged between the edge of the first through hole and the first hard pipe (15), and one end, penetrating out of the first through hole, of the first hard pipe (15) is connected with a first hose (79);

a second through hole for a second hard pipe (17) to pass through is formed in the crankcase (2), a second corrugated pipe (18) is arranged between the edge of the second through hole and the second hard pipe (17), and one end, penetrating out of the second through hole, of the second hard pipe (17) is connected with a second hose (80);

the lubricating oil supply device comprises an oil tank (76) and an oil pump (75), wherein the first hose (79) and the second hose (80) are both connected with the output end of the oil pump (75), and the input end of the oil pump (75) is connected with the oil tank (76).

6. The engine lubricating structure according to any one of claims 1 to 5, characterized in that:

a first limiting groove (44) is formed in the side of the first sliding rod (37), and a first limiting pin (47) capable of being matched with the first limiting groove (44) is connected to the piston (3) in a sliding mode;

a second limiting groove (64) is formed in the side portion of the second sliding rod (38), and a second limiting pin (67) capable of being matched with the second limiting groove (64) is connected to the piston (3) in a sliding mode;

and the piston (3) is also provided with a driving device for driving the first limiting pin (47) and the second limiting pin (67) to move.

7. The engine lubricating structure according to claim 6, characterized in that:

a first front end plate (48) is arranged at the rear end of the first limiting pin (47), a first front compression spring (49) is arranged between the front part of the first front end plate (48) and the piston (3), a first rear end plate (53) positioned behind the first limiting pin (47) is further connected to the piston (3) in a sliding manner, a first rear compression spring (51) is arranged between the first front end plate (48) and the first rear end plate (53), and a first ejector rod (54) is arranged at the rear part of the first rear end plate (53);

a second front end plate (68) is arranged at the rear end of the second limiting pin (67), a second front compression spring (69) is arranged between the front part of the second front end plate (68) and the piston (3), a second rear end plate (73) positioned behind the second limiting pin (67) is further connected to the piston (3) in a sliding manner, a second rear compression spring (71) is arranged between the second front end plate (68) and the second rear end plate (73), and a second ejector rod (74) is arranged at the rear part of the second rear end plate (73);

the driving device comprises a stop block (56) which is connected with the piston (3) in a sliding mode, the stop block (56) is located between the first rear end plate (53) and the second rear end plate (73), a first ejector rod groove (57) used for accommodating the first ejector rod (54) is formed in one side of the stop block (56), a second ejector rod groove (58) used for accommodating the second ejector rod (74) is formed in the other side of the stop block (56), the upper side wall of the first ejector rod groove (57) and the upper side wall of the second ejector rod groove (58) are obliquely arranged, a resetting device is arranged between the stop block (56) and the piston (3), a third ejector rod (55) is arranged at the lower end of the stop block (56), and a third protruding portion (62) which can be in contact with the third ejector rod (55) is arranged in the middle of the end portion of the connecting rod (.

8. The engine lubricating structure according to claim 7, characterized in that:

a first guide post (52) is arranged at the front part of the first rear end plate (53), and the first rear compression spring (51) is sleeved on the first guide post (52);

the front part of the second rear end plate (73) is provided with a second guide column (72), and the second rear compression spring (71) is sleeved on the second guide column (72).

9. The engine lubricating structure according to claim 6, characterized in that:

a first sliding block (45) connected with the piston (3) in a sliding manner is arranged at the lower end of the first sliding rod (37), a first limiting groove (44) is formed in the first sliding block (45), and a first roller (43) is rotatably connected to the lower end of the first sliding block (45);

the lower end of the second sliding rod (38) is provided with a second sliding block (65) which is connected with the piston (3) in a sliding mode, the second limiting groove (64) is formed in the second sliding block (65), and the lower end of the second sliding block (65) is rotatably connected with a second roller (63).

10. The engine lubricating structure according to claim 6, characterized in that:

a first sealing ring (11) positioned above the first oil groove (12) is arranged on the piston (3);

and a second sealing ring (14) positioned below the second oil groove (13) is arranged on the piston (3).

Technical Field

The invention relates to the technical field of engine lubrication.

In particular to an engine lubricating structure.

Background

The fuel engine generally includes: the improved crankshaft structure comprises a cylinder body, wherein a spark plug is arranged at the upper end of the cylinder body, a piston is connected in the cylinder body in a sliding mode, the lower end of the piston is hinged to the upper end of a connecting rod, a crankcase is arranged at the lower end of the cylinder body, a crankshaft is arranged in the crankcase and comprises a plurality of main journals, crank arms are arranged on the main journals, a connecting rod journal is arranged between every two adjacent crank arms, and the lower end of the connecting rod is rotatably connected with the connecting.

The piston moves in the cylinder body, and intense friction occurs between the piston and the cylinder body, so that lubricating oil needs to be added between the piston and the cylinder body. The oil feed of splashing type is generally adopted among the prior art, and is specific, holds lubricating oil in the crankcase, and along with the crankshaft rotation, lubricating oil splashes to the cylinder body.

The above technical solution has the following disadvantages: 1. the splashed lubricating oil can only reach the lower part of the piston and hardly reaches a gap between the piston and the cylinder body, the lubricating effect is better when the piston moves downwards, and the lubricating effect is poorer when the piston moves upwards; 2. as the crankshaft speed increases, the greater its resistance to lubricating oil, decreases the operating efficiency of the fuel engine.

Disclosure of Invention

The invention aims to overcome the defects of the traditional technology and provide an engine lubricating structure, so that the lubricating effect between a piston and a cylinder body is improved.

The aim of the invention is achieved by the following technical measures: an engine lubricating structure comprises a cylinder body, wherein a piston is connected in the cylinder body in a sliding manner, a connecting rod is hinged to the piston, a first oil groove is formed in the side portion of the upper end of the piston, the first oil groove is connected with a first oil path formed in the piston, a first sliding rod is connected to the piston in a sliding manner, a first plug capable of plugging the first oil path is arranged at one end of the first sliding rod, the other end of the first sliding rod extends out of the lower end of the piston, and a first sliding rod spring is arranged between the first sliding rod and the piston; a second oil groove is formed in the side portion of the lower end of the piston, the second oil groove is connected with a second oil path formed in the piston, a second sliding rod is connected to the piston in a sliding mode, a second plug capable of plugging the second oil path is arranged at one end of the second sliding rod, the other end of the second sliding rod extends out of the lower end of the piston, and a second sliding rod spring is arranged between the second sliding rod and the piston; the first oil path and the second oil path are both connected with a lubricating oil supply device, one side of the connecting rod is provided with a first protruding part which can be contacted with the first sliding rod, and the other side of the connecting rod is provided with a second protruding part which can be contacted with the second sliding rod.

As an improvement: the first oil way comprises a first switching channel connected with the first oil groove and a first transverse channel which is positioned above the first switching channel and connected with the lubricating oil supply device, a first conical channel is arranged between the first switching channel and the first transverse channel, the first sliding rod penetrates through the first conical channel, and the shape of the first plug corresponds to that of the first conical channel;

the second oil path comprises a second switching channel connected with the second oil groove and a second transverse channel which is positioned above the second switching channel and connected with the lubricating oil supply device, a second tapered channel is arranged between the second switching channel and the second transverse channel, the second sliding rod penetrates through the second tapered channel, and the shape of the second plug corresponds to that of the second tapered channel.

As an improvement: the first oil way also comprises a first middle channel positioned on the central axis of the piston, the lower end of the first middle channel is connected with a first switching channel, and a first oil outlet channel is arranged between the upper end of the first middle channel and the first oil groove; the second oil way further comprises a second middle channel located on the central axis of the piston, the upper end of the second middle channel is connected with the second switching channel, and a second oil outlet channel is arranged between the lower end of the second middle channel and the second oil groove.

As an improvement: the lower end of the cylinder body is provided with a crankcase, a crankshaft is arranged in the crankcase, and the connecting rod is rotationally connected with a connecting rod journal of the crankshaft; the first transverse channel is connected with a first vertical channel, the lower end of the first vertical channel is connected with the middle part of a first transverse pipe, and two ends of the first transverse pipe are respectively connected with a first hard pipe; the second transverse channel is connected with a second vertical channel, the lower end of the second vertical channel is connected with the middle part of a second transverse pipe, and two ends of the second transverse pipe are respectively connected with a second hard pipe; the first hard tube and the second hard tube are respectively located on two sides of the crankshaft, the two first hard tubes can be respectively located on two sides of the connecting rod, and the two second hard tubes can be respectively located on two sides of the connecting rod.

As an improvement: a first through hole for a first hard pipe to pass through is formed in the crankcase, a first corrugated pipe is arranged between the edge of the first through hole and the first hard pipe, and one end of the first hard pipe, which penetrates out of the first through hole, is connected with a first hose; a second through hole for a second hard pipe to pass through is formed in the crankcase, a second corrugated pipe is arranged between the edge of the second through hole and the second hard pipe, and one end of the second hard pipe, which penetrates out of the second through hole, is connected with a second hose; the lubricating oil supply device comprises an oil tank and an oil pump, the first hose and the second hose are connected with the output end of the oil pump, and the input end of the oil pump is connected with the oil tank.

As an improvement: a first limiting groove is formed in the side of the first sliding rod, and a first limiting pin which can be matched with the first limiting groove is connected to the piston in a sliding mode; a second limiting groove is formed in the side of the second sliding rod, and a second limiting pin capable of being matched with the second limiting groove is connected to the piston in a sliding mode; the piston is also provided with a driving device for driving the first limit pin and the second limit pin to move.

As an improvement: a first front end plate is arranged at the rear end of the first limiting pin, a first front compression spring is arranged between the front part of the first front end plate and the piston, a first rear end plate positioned behind the first limiting pin is also connected to the piston in a sliding manner, a first rear compression spring is arranged between the first front end plate and the first rear end plate, and a first ejector rod is arranged at the rear part of the first rear end plate; a second front end plate is arranged at the rear end of the second limiting pin, a second front compression spring is arranged between the front part of the second front end plate and the piston, a second rear end plate positioned behind the second limiting pin is also connected to the piston in a sliding manner, a second rear compression spring is arranged between the second front end plate and the second rear end plate, and a second ejector rod is arranged at the rear part of the second rear end plate; the driving device comprises a check block which is connected with the piston in a sliding mode, the check block is located between the first rear end plate and the second rear end plate, a first ejector rod groove used for containing a first ejector rod is formed in one side of the check block, a second ejector rod groove used for containing a second ejector rod is formed in the other side of the check block, the upper side wall of the first ejector rod groove and the upper side wall of the second ejector rod groove are arranged in an inclined mode, a reset device is arranged between the check block and the piston, a third ejector rod is arranged at the lower end of the check block, and a third protruding portion which can be in contact with the third ejector rod is arranged in the middle of the end.

As an improvement: the front part of the first rear end plate is provided with a first guide post, and the first rear compression spring is sleeved on the first guide post; and a second guide post is arranged at the front part of the second rear end plate, and the second rear compression spring is sleeved on the second guide post.

As an improvement: the lower end of the first sliding rod is provided with a first sliding block in sliding connection with the piston, the first limiting groove is formed in the first sliding block, and the lower end of the first sliding block is rotatably connected with a first roller; the lower end of the second sliding rod is provided with a second sliding block in sliding connection with the piston, a second limiting groove is formed in the second sliding block, and the lower end of the second sliding block is rotatably connected with a second roller.

As an improvement: the piston is provided with a first sealing ring positioned above the first oil groove; and a second sealing ring positioned below the second oil groove is arranged on the piston.

Due to the adoption of the technical scheme, compared with the prior art, the invention has the advantages that: when the piston moves from top to bottom, the lubricating oil released by the second oil groove is adhered to the cylinder body, so that the lubricating effect between the upper part of the piston and the cylinder body is improved; when the piston moves from bottom to top, the lubricating oil released by the first oil groove is adhered to the cylinder body, and the lubricating effect between the lower part of the piston and the cylinder body is improved.

The invention is further described with reference to the following figures and detailed description.

Drawings

FIG. 1 is a schematic diagram of an engine lubrication structure according to the present invention.

FIG. 2 is a schematic diagram of the internal structure of a piston in an engine lubrication structure according to the present invention.

Fig. 3 is a schematic view of the piston moving downward in the portion a of fig. 2.

Fig. 4 is a schematic structural view of a portion B in fig. 3.

Fig. 5 is a schematic structural view of section C-C in fig. 3.

Fig. 6 is a schematic structural view of section D-D in fig. 3.

Fig. 7 is a schematic view of the piston at the lowermost end of its stroke in detail a of fig. 2.

Fig. 8 is a schematic structural view of a portion E of fig. 7.

Fig. 9 is a schematic view of the piston moving upward in section a of fig. 2.

Fig. 10 is a schematic view of the structure of a portion F in fig. 9.

Fig. 11 is a schematic view of the piston of fig. 2 at the uppermost end of its stroke in detail a.

Fig. 12 is a schematic structural view of a portion G in fig. 11.

FIG. 13 is a schematic structural view of section H-H in FIG. 2.

Fig. 14 is a schematic structural diagram of a first cross pipe and a second cross pipe in an engine lubricating structure according to the invention.

In the figure: 1-a cylinder body; 2-a crankcase; 3-a piston; 4-connecting rings; 5-a connecting rod; 6-connecting rod journal; 7-main journal; 8-crank arm; 9-a spark plug; 10-oil discharge port; 11-a first sealing ring; 12-a first oil sump; 13-a second oil sump; 14-a second sealing ring; 15-a first rigid tube; 16-a first bellows; 17-a second rigid tube; 18-a second bellows; 19-a first projection; 20-a second projection; 21-a first cross tube; 22-a second cross tube; 23-a first vertical channel; 24-a second vertical channel; 25-a first transverse channel; 26-a second transverse channel; 27-a first transfer channel; 28-a second transfer channel; 29-a first plug; 30-a second plug; 31-a first tapered channel; 32-a second tapered channel; 33-a first intermediate channel; 34-a second intermediate channel; 35-a first oil outlet channel; 36-a second oil outlet channel; 37-a first slide bar; 38-a second slide bar; 39-a first sliding rod spring; 40-a first slider sliding cavity; 41-a second sliding rod spring; 42-a second slider sliding cavity; 43-a first roller; 44-a first restraint slot; 45-a first slider; 46-first limit pin slide hole; 47-a first limit pin; 48-a first front endplate; 49-first front compression spring; 50-a first end plate sliding cavity; 51-a first rear compression spring; 52-first guide post; 53-a first rear end plate; 54-a first top bar; 55-a third ejector rod; 56-a stop block; 57-a first ejector pin slot; 58-a second ejector pin slot; 59-a limiting plate; 60-a stopper spring; 61-limiting plate sliding cavity; 62-a third projection; 63-a second roller; 64-a second limit groove; 65-a second slider; 66-a second limit pin slide hole; 67-a second limit pin; 68-a second front endplate; 69-a second front compression spring; 70-a second end plate sliding cavity; 71-a second rear compression spring; 72-a second guide post; 73-a second rear end plate; 74-second ejector pin; 75-an oil pump; 76-oil tank; 77-first cross tube oil outlet; 78-second cross tube oil outlet; 79-a first hose; 80-a second hose; 81-first sliding bar sliding hole; 82-second slide bar slide hole.

Detailed Description

Example (b): as shown in fig. 1 to 14, an engine lubricating structure comprises a cylinder body 1, a spark plug 9 is arranged at the upper end of the cylinder body 1, a piston 3 is connected in the cylinder body 1 in a sliding manner, a connecting ring 4 is arranged at the lower end of the piston 3, an upper end of a connecting rod 5 is hinged to the connecting ring 4, a crankcase 2 is arranged at the lower end of the cylinder body 1, an oil discharge port 10 is arranged at the lower part of the crankcase 2, a crankshaft is arranged in the crankcase 2 and comprises a plurality of main journals 7, crank arms 8 are arranged on the main journals 7, a connecting rod journal 6 is arranged between every two adjacent crank arms 8, and the lower end of the connecting rod 5 is rotatably.

Piston 3 upper end lateral part is seted up around 3 a week first oil grooves 12 of piston, first oil groove 12 is connected with the first oil circuit of seting up in piston 3 inside, sliding connection has first slide bar 37 on piston 3, the preferred, piston 3 is inside to be seted up the first slide bar slide opening 81 of vertical setting, first slide bar 37 is located first slide bar slide opening 81. A first plug 29 capable of plugging a first oil path is arranged at one end of the first sliding rod 37, the other end of the first sliding rod 37 extends out from the lower end of the piston 3, a first sliding rod spring 39 is arranged between the first sliding rod 37 and the piston 3, specifically, a first slider 45 in sliding connection with the piston 3 is arranged at the lower end of the first sliding rod 37, a first slider sliding cavity 40 connected with a first sliding rod sliding hole 81 is arranged at the lower end of the piston 3, at least one part of the first slider 45 is positioned in the first slider sliding cavity 40, the first sliding rod spring 39 is sleeved on the first sliding rod 37, the upper end of the first sliding rod spring 39 abuts against the upper part of the first slider sliding cavity 40, the lower end of the first sliding rod spring 39 abuts against the first slider 45, and the lower end of the first slider 45 is rotatably connected with a first roller 43.

The second oil groove 13 around 3 a week of piston is seted up to 3 lower extreme lateral parts of piston, second oil groove 13 is connected with the second oil circuit of seting up in piston 3 inside, sliding connection has second slide bar 38 on piston 3, and is preferred, piston 3 is inside to be seted up the second slide bar slide opening 82 of vertical setting, second slide bar 38 is located second slide bar slide opening 82. A second plug 30 capable of plugging a second oil path is arranged at one end of the second sliding rod 38, the other end of the second sliding rod 38 extends out from the lower end of the piston 3, a second sliding rod spring 41 is arranged between the second sliding rod 38 and the piston 3, specifically, a second slider 65 in sliding connection with the piston 3 is arranged at the lower end of the second sliding rod 38, a second slider sliding cavity 42 connected with a second sliding rod sliding hole 82 is arranged at the lower end of the piston 3, at least one part of the second slider 65 is located in the second slider sliding cavity 42, the second sliding rod spring 41 is sleeved on the second sliding rod 38, the upper end of the second sliding rod spring 41 abuts against the upper part of the second slider sliding cavity 42, the lower end of the second sliding rod spring 41 abuts against the second slider 65, and the lower end of the second slider 65 is rotatably connected with a second roller 63.

The first oil path and the second oil path are both connected with a lubricating oil supply device, one side of the connecting rod 5 is provided with a first protruding part 19 capable of contacting with the first sliding rod 37, the other side of the connecting rod 5 is provided with a second protruding part 20 capable of contacting with the second sliding rod 38, one end of the first protruding part 19 far away from the connecting rod 5 is in a circular arc shape, one end of the second protruding part 20 far away from the connecting rod 5 is in a circular arc shape, the circular arc-shaped first protruding part 19 is matched with the first roller 43, the movement is stable, and the circular arc-shaped second protruding part 20 is matched with the second roller 63, so the movement is stable.

When the piston 3 moves from top to bottom, the connecting rod 5 drives the crankshaft, at which point the connecting rod 5 deflects to the right. The first sliding rod 37 drives the first plug 29 to block the first oil path under the action of the first sliding rod spring 39, and the first oil path is not communicated. The second protrusion 20 pushes the second roller 63, so that the second slider 65 and the second sliding rod 38 move upward to drive the second plug 30 to leave the original position, the second oil path is conducted, the lubricating oil enters the second oil groove 13 through the second oil path to fill the gap between the piston 3 and the cylinder body 1, and because the second oil groove 13 is located at the lower end of the piston 3, when the piston 3 moves from top to bottom, the lubricating oil released by the second oil groove 13 adheres to the cylinder body 1, so that the lubricating effect between the upper part of the piston 3 and the cylinder body 1 is improved.

When the piston 3 moves upward from below, the connecting rod 5 drives the crankshaft, and at this time, the connecting rod 5 deflects to the left. The second sliding rod 38 drives the second plug 30 to plug the second oil path under the action of the second sliding rod spring 41, and the second oil path is not communicated. The first protruding portion 19 pushes the first roller 43, so that the first slider 45 and the first sliding rod 37 move upwards to drive the first plug 29 to leave the original position, the first oil path is conducted, the lubricating oil enters the first oil groove 12 through the first oil path to fill the gap between the piston 3 and the cylinder body 1, and because the first oil groove 12 is located at the upper end of the piston 3, when the piston 3 moves upwards from the bottom, the lubricating oil released by the first oil groove 12 is adhered to the cylinder body 1, so that the lubricating effect between the lower portion of the piston 3 and the cylinder body 1 is improved.

And repeating the above processes to complete the cycle.

A first sealing ring 11 positioned above a first oil groove 12 is arranged on the piston 3; and a second sealing ring 14 positioned below the second oil groove 13 is arranged on the piston 3. The lubricating oil overflows the clearance between the piston 3 and the cylinder body 1, and the lubricating effect between the piston 3 and the cylinder body 1 is improved.

The first oil path includes a first transfer passage 27 connected to the first oil groove 12 and a first transverse passage 25 located above the first transfer passage 27 and connected to the lubricating oil supply device, a first tapered passage 31 is provided between the first transfer passage 27 and the first transverse passage 25, the first sliding rod 37 passes through the first tapered passage 31, and the first plug 29 has a shape corresponding to the first tapered passage 31.

The second oil path includes a second switching passage 28 connected to the second oil groove 13 and a second transverse passage 26 located above the second switching passage 28 and connected to the lubricating oil supply device, a second tapered passage 32 is provided between the second switching passage 28 and the second transverse passage 26, the second sliding rod 38 passes through the second tapered passage 32, and the second plug 30 has a shape corresponding to the second tapered passage 32.

When the first sliding rod 37 moves upwards, the first sliding rod 37 pushes the first plug 29 to be separated from the first tapered channel 31 and enter the first transverse channel 25, at this time, the first connecting channel 27 is communicated with the first transverse channel 25, when the first sliding rod 37 moves downwards, the first sliding rod 37 pulls the first plug 29 to plug the first tapered channel 31, at this time, the first connecting channel 27 is not communicated with the first transverse channel 25.

When the second sliding rod 38 moves upward, the second sliding rod 38 pushes the second plug 30 to disengage from the second tapered channel 32 and enter the second transverse channel 26, at this time, the second adapter channel 28 is communicated with the second transverse channel 26, when the second sliding rod 38 moves downward, the second sliding rod 38 pulls the second plug 30 to close the second tapered channel 32, at this time, the second adapter channel 28 is not communicated with the second transverse channel 26.

And repeating the above processes to complete the cycle.

The first oil path further comprises a first middle channel 33 located on the central axis of the piston 3, the lower end of the first middle channel 33 is connected with the first transfer channel 27, a plurality of first oil outlet channels 35 are arranged between the upper end of the first middle channel 33 and the first oil groove 12, and the plurality of first oil outlet channels 35 are uniformly arranged along the circumferential direction of the piston 3. The second oil path further comprises a second middle channel 34 located on the central axis of the piston 3, the upper end of the second middle channel 34 is connected with the second switching channel 28, a plurality of second oil outlet channels 36 are arranged between the lower end of the second middle channel 34 and the second oil groove 13, and the plurality of second oil outlet channels 36 are uniformly arranged along the circumferential direction of the piston 3.

The first middle channel 33 is located at the center of the first oil groove 12, and the distances from the first middle channel to the first oil groove 12 are equal, so that the uniformity of lubricating oil supply in the first oil groove 12 is improved; second intermediate channel 34 is located second oil groove 13 centre of a circle department, and each department distance equals to second oil groove 13, is favorable to improving the homogeneity that lubricating oil supplied in second oil groove 13.

The first transverse channel 25 is connected with a first vertical channel 23, the lower end of the first vertical channel 23 is connected with a first transverse pipe oil outlet 77 in the middle of a first transverse pipe 21, and two ends of the first transverse pipe 21 are respectively connected with a first hard pipe 15; the second transverse channel 26 is connected with a second vertical channel 24, the lower end of the second vertical channel 24 is connected with a first transverse pipe oil outlet 78 in the middle of a second transverse pipe 22, and two ends of the second transverse pipe 22 are respectively connected with a second hard pipe 17; the first hard tube 15 and the second hard tube 17 are respectively located on two sides of the crankshaft, the two first hard tubes 15 can be respectively located on two sides of the connecting rod 5, and the two second hard tubes 17 can be respectively located on two sides of the connecting rod 5. The two first hard tubes 15 and the two second hard tubes 17 are located outside the motion range of the connecting rod 5 and the crankshaft, so that the connecting rod 5 and the crankshaft are prevented from interfering and component damage is avoided.

A first through hole for a first hard tube 15 to pass through is formed in the crankcase 2, a first corrugated tube 16 is arranged between the edge of the first through hole and the first hard tube 15, and one end of the first hard tube 15, which penetrates out of the first through hole, is connected with a first hose 79; a second through hole for a second hard tube 17 to pass through is formed in the crankcase 2, a second corrugated tube 18 is arranged between the edge of the second through hole and the second hard tube 17, and one end of the second hard tube 17, which passes through the second through hole, is connected with a second hose 80; the lubricating oil supply device comprises an oil tank 76 and an oil pump 75, the first hose 79 and the second hose 80 are both connected with the output end of the oil pump 75, and the input end of the oil pump 75 is connected with the oil tank 76.

When the piston 3 moves up and down, the first hard tube 15 and the second hard tube 17 move up and down, the first bellows 16 and the second bellows 18 are used for sealing the first through hole and the second through hole and do not obstruct the movement of the first hard tube 15 and the second hard tube 17, and the first hose 79 and the second hose 80 ensure that the first hard tube 15 and the second hard tube 17 are firmly connected with the oil pump 75 when moving.

A first limiting groove 44 is formed in the side of the first sliding rod 37, specifically, the first limiting groove 44 is formed in a first sliding block 45, a first limiting pin sliding hole 46 is formed in the piston 3, and a first limiting pin 47 capable of being matched with the first limiting groove 44 is slidably connected in the first limiting pin sliding hole 46; a second limiting groove 64 is formed in the side portion of the second sliding rod 38, specifically, the second limiting groove 64 is formed in the second sliding block 65, a second limiting pin sliding hole 66 is formed in the piston 3, and a second limiting pin 67 which can be matched with the second limiting groove 64 is slidably connected in the second limiting pin sliding hole 66; the piston 3 is further provided with a driving device for driving the first limit pin 47 and the second limit pin 67 to move.

When the piston 3 moves from top to bottom, the connecting rod 5 drives the crankshaft, at this time, the connecting rod 5 deflects towards the right side, when the deflection angle of the connecting rod 5 towards the right side is maximum, that is, when the connecting rod journal 6 and the main journal 7 are positioned on the same horizontal plane, the second limit pin 67 is driven to advance, the second limit pin 67 enters the second limit groove 64, at this time, the flow rate of the second oil path is maximum, and when the piston 3 continues to move downwards and the deflection angle of the connecting rod 5 towards the right side is reduced, the flow rate of the second oil path is unchanged, so that the lubricating effect is improved.

When the piston 3 moves from bottom to top, the connecting rod 5 drives the crankshaft, at this time, the connecting rod 5 deflects to the left side, the second limit pin 67 is driven to retreat, and the second plug 30 returns to the original position.

When the connecting rod 5 deflects to the left by the largest angle, that is, the connecting rod journal 6 and the main journal 7 are located on the same horizontal plane, the first limit pin 47 is driven to advance, the first limit pin 47 enters the first limit groove 44, at this time, the flow rate of the first oil path is the largest, and when the piston 3 continues to move upwards and the deflection angle of the connecting rod 5 to the right is reduced, the flow rate of the first oil path is unchanged, so that the lubricating effect is improved.

And repeating the above processes to complete the cycle.

First spacer pin 47 rear end is equipped with first front end plate 48, be equipped with first preceding compression spring 49 between first front end plate 48 front portion and the piston 3, still be equipped with first end plate sliding chamber 50 on the piston 3, first end plate sliding chamber 50 sliding connection has the first back end plate 53 that is located first spacer pin 47 rear, be equipped with first back compression spring 51 between first front end plate 48 and the first back end plate 53, it is concrete, first back end plate 53 front portion is equipped with first guide post 52, first back compression spring 51 cup joints on first guide post 52, first back end plate 53 rear portion is equipped with first ejector pin 54.

Second spacer pin 67 rear end is equipped with second front end plate 68, be equipped with the preceding compression spring 69 of second between second front end plate 68 front portion and the piston 3, still be equipped with second end plate sliding chamber 70 on the piston 3, sliding connection has the second rear end plate 73 that is located second spacer pin 67 rear in the second end plate sliding chamber 70, be equipped with second back compression spring 71 between second front end plate 68 and the second rear end plate 73, it is concrete, second rear end plate 73 front portion is equipped with second guide post 72, compression spring 71 cup joints on second guide post 72 behind the second, second rear end plate 73 rear portion is equipped with second ejector pin 74.

The driving device comprises a stopper 56 slidably connected with the piston 3, the stopper 56 is located between the first rear end plate 53 and the second rear end plate 73, a first ejector rod groove 57 used for accommodating the first ejector rod 54 is formed in one side of the stopper 56, a second ejector rod groove 58 used for accommodating the second ejector rod 74 is formed in the other side of the stopper 56, the upper side wall of the first ejector rod groove 57 and the upper side wall of the second ejector rod groove 58 are obliquely arranged, a resetting device is arranged between the stopper 56 and the piston 3, specifically, a limiting plate sliding cavity 61 located above the stopper 56 is formed in the piston 3, a limiting plate 59 is arranged at one end, extending into the limiting plate sliding cavity 61, of the stopper 56, the size of the limiting plate 59 is larger than the sectional size of the stopper 56, and a stopper spring 60 is arranged between the upper portion of the limiting plate 59 and the upper portion of the limiting plate. The lower end of the stop block 56 is provided with a third top rod 55, a third protrusion 62 capable of contacting with the third top rod 55 is arranged in the middle of the end of the connecting rod 5, and the third protrusion 62 is arc-shaped. The circular arc-shaped third protruding part 62 is matched with the third top rod 55, and the movement is stable.

When the piston 3 moves from top to bottom, the connecting rod 5 drives the crankshaft, at this time, the connecting rod 5 deflects towards the right side, when the deflection angle of the connecting rod 5 towards the right side is maximum, the elastic force of the second rear compression spring 71 is greater than the elastic force of the second front compression spring 69, the second limit pin 67 is driven to advance, and the second limit pin 67 enters the second limit groove 64. At this time, the end of the first stopper pin 47 contacts the side of the second slider 45.

When the piston 3 moves to the lowest end, the connecting rod 5 is in a vertical state, the third protrusion 62 pushes the third ejector pin 55 to drive the stopper 56 to move upwards, when the second ejector pin groove 58 moves to the second ejector pin 74, the second ejector pin 74 enters the second ejector pin groove 58, the length of the second rear compression spring 71 is increased, the elastic force of the second rear compression spring 71 is smaller than that of the second front compression spring 69 to drive the second limit pin 67 to retreat, the second limit pin 67 exits the second limit groove 64, and the second sliding block 65 is reset.

When the piston 3 moves upward from below, the stopper spring 60 pushes the stopper 56 to move downward, and the second plunger 74 disengages from the second plunger groove 58. The connecting rod 5 drives the crankshaft, at this time, the connecting rod 5 deflects to the left, when the left deflection angle of the connecting rod 5 is the largest, the elastic force of the first rear compression spring 51 is greater than the elastic force of the first front compression spring 49, the first limit pin 47 is driven to advance, and the first limit pin 47 enters the first limit groove 44. At this time, the end of the second stopper pin 67 contacts the side of the first slider 65.

When the piston 3 moves to the uppermost end, the connecting rod 5 is in a vertical state, the third protrusion 62 pushes the third ejector pin 55 to drive the stopper 56 to move upwards, when the first ejector pin groove 57 moves to the first ejector pin 54, the first ejector pin 54 enters the first ejector pin groove 57, the length of the first rear compression spring 51 is increased, the elastic force of the first rear compression spring 51 is smaller than that of the first front compression spring 49 to drive the first limit pin 47 to move backwards, the first limit pin 47 exits the first limit groove 44, and the first slider 45 resets.

And repeating the above processes to complete the cycle.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.