CN218624407U - High-sealing-performance piston - Google Patents

Abstract

A high-sealing piston relates to a piston device of an internal combustion engine, and mainly solves the problem that the sealing performance of pistons in two cylinders of a two-cylinder matching type four-stroke synchronous internal combustion engine technology in the prior art is poor. The invention utilizes the convex-concave surface engagement of the left piston plate and the right piston plate to form an integral high-tightness piston device. The spring is installed between the joint surfaces of the left and right piston plates, the left and right piston plates are respectively divided into an upper part and a lower part, the upper part and the lower part of the left and right piston plates are also meshed by a convex-concave surface, and the spring is also arranged between the joint surfaces of the two parts. When the piston works, the left and right piston plates make the top arc surface and two side surfaces of the upper part of the piston tightly press the inner wall of the cylinder and the two end covers under the expanding pressure of the spring, thereby improving the sealing performance of the piston with high sealing performance.

Description

High-sealing-performance piston

The technical field is as follows:

the invention relates to a high-tightness piston device which can improve the tightness of pistons in two cylinders of a two-cylinder matching type four-stroke synchronous internal combustion engine.

Background art:

the technical characteristics of the piston in two cylinders of the prior two-cylinder matching type four-stroke synchronous internal combustion engine technology, such as the piston described in patent No. ZL201821066530.6, are that the sealing performance of the piston in the cylinder is poor.

The invention content is as follows:

the object of the present invention is to provide a piston device having a piston which is easily lubricated and wear-resistant in a cylinder and has high sealing performance as compared with the prior art. In order to realize the purpose of the invention, the high-tightness piston is formed by mutually matching a left piston plate and a right piston plate. The left and right piston plates have the same shape, the lower parts of the left and right piston plates are respectively a semicircular disc plate when viewed from the side direction, then the upper parts of the left and right sides of the semicircular disc plates are transited to the top ends of the upper parts by oblique arc surfaces, and the top end surfaces are a section of arc surfaces. The left and right piston plates are respectively designed into an upper part and a lower part. The left upper part and the left lower part of the left piston plate are tightly matched with each other through the first convex surface platform and the third concave surface groove to form a left piston plate, but the left piston plate and the left piston plate can slide mutually. The second concave groove and the fourth concave groove, which have the same width and depth, form a left overall concave groove of the left piston plate, but can slide with each other. The right piston plate is composed of a right upper portion and a right lower portion. The upper part of the right side of the right piston plate is provided with a fifth convex surface platform and a sixth convex surface platform, the lower part of the right side of the right piston plate is provided with a seventh concave surface groove and an eighth convex surface platform, and the upper part of the right side and the lower part of the right side of the right piston plate are tightly matched with the seventh concave surface groove through the fifth convex surface platform to form a right piston plate, but the fifth convex surface platform and the seventh concave surface groove can slide mutually. The sixth convex surface platform and the eighth convex surface platform have the same width and height, and jointly form a right integral convex surface platform of the right piston plate, but the sixth convex surface platform and the eighth convex surface platform can slide mutually. The left and right piston plates are matched with the right integral convex surface platform through the left integral concave surface groove to form an integral high-tightness piston device. The whole piston is in a shape, the lower part of the whole piston is a semicircular disc-shaped plate when viewed from the side, then the top end of the upper part is transited to by oblique arc surfaces along the left side surface and the right side surface of the semicircular disc, and the top end surface is a section of arc surface. The upper part and the lower part of each of the two piston plates are respectively provided with a main engine oil channel, a slidable positioning pin is arranged between the upper part and the lower part of each of the piston plates, a spring penetrates through the positioning pin, an engine oil channel is arranged in the positioning pin, and the engine oil channel in the positioning pin enables the main engine oil channels at the upper part and the lower part of each of the piston plates to be mutually communicated. The top end cambered surface of the upper part and two lateral planes of the upper part of each piston plate are respectively provided with an engine oil hole which is communicated with the upper part and the lower part of the main engine oil channel of each piston plate.

The lower parts of the left piston plate and the right piston plate are provided with spring seats, and springs are arranged on the spring seats at the lower parts of the left piston plate and the right piston plate. The upper part of the left piston plate and the upper part of the right piston plate are provided with a slidable positioning pin between the left piston plate and the right piston plate, a spring penetrates through the positioning pin, an engine oil channel is arranged in the positioning pin, and the engine oil channel in the positioning pin enables two lateral planes on the upper part of each piston plate to be communicated with the engine oil channel on the lower part of each piston plate. The lower part of each piston plate is provided with a main rotating shaft hole, and the main rotating shaft hole is provided with an engine oil hole which is mutually communicated with the main engine oil channel at the upper part and the lower part of each piston plate. The lateral plane of the lower part of each of the left and right piston plates is provided with an engine oil hole which is communicated with the main engine oil channel at the upper part and the lower part of each piston plate. The whole high-sealing piston is integrated, and the top end arc surface and two lateral planes of the upper part are respectively provided with an engine oil hole which is communicated with the respective upper part and lower part of the main engine oil channel of the two piston plates.

When the piston device is applied, the integral high-tightness piston device is firstly installed on an engine main rotating shaft of the two-cylinder matching type four-stroke synchronous internal combustion engine through a shaft key, and then the high-tightness piston is installed in a cylinder of the two-cylinder matching type four-stroke synchronous internal combustion engine through left, right, up and down extrusion. The upper and lower parts of the left and right piston plates are engaged with each other by concave grooves and convex lands, and the joint surface has high sealing performance. The left and right piston plates are mutually meshed with the right integral convex platform into a whole through the left integral concave groove, and the whole piston plate has high sealing performance at the joint surface. The upper part and the lower part of each of the left and the right piston plates are subjected to the expansion pressure of the spring, so that the top end circular arc surface of the upper part of each piston plate is tightly pressed on the inner wall of the cylinder of the two-cylinder matching type four-stroke synchronous internal combustion engine, and the sealing performance of the joint surface of the top end circular arc surface of the upper end of the piston and the inner wall of the cylinder with high overall sealing performance is improved. The side surfaces of the upper parts of the left and right piston plates are pressed tightly on the two end covers of the cylinder of the two-cylinder matching type four-stroke synchronous internal combustion engine under the expansion pressure of the spring between the upper parts of the left and right piston plates; the lower parts of the left and right piston plates are pressed tightly on the two end covers of the cylinder of the two-cylinder matching type four-stroke synchronous internal combustion engine by the expansion pressure of the spring, so that the sealing performance between the two side surfaces of the integral high-sealing piston and the two end covers of the cylinder of the two-cylinder matching type four-stroke synchronous internal combustion engine is improved. After the integral high-sealing piston is arranged in the cylinder of the engine of the two-cylinder matching type four-stroke synchronous internal combustion engine, the top end arc surface of the upper end of the integral high-sealing piston is tightly pressed on the inner wall of the cylinder, and the end surfaces of two side surfaces of the high-sealing piston are tightly pressed on the two end covers of the cylinder, so that the sealing performance of the integral high-sealing piston in the cylinder of the four-stroke synchronous internal combustion engine is improved. The whole high-sealing piston is integrally provided with the oil holes arranged on the arc surface and the side surface at the top end of the front surface and communicated with the main oil channels at the upper part and the lower part of the two piston plates, so that the whole high-sealing piston can be communicated with the inner oil channel on the main rotating shaft of the engine of the four-stroke synchronous internal combustion engine after being arranged on the main rotating shaft of the engine of the two-cylinder matching type four-stroke synchronous internal combustion engine, and the lubricating property and the sealing property of the high-sealing piston in the cylinder of the two-cylinder matching type four-stroke synchronous internal combustion engine are further improved.

During work, the arc surface of the top end of the upper part of the whole high-tightness piston is tightly pressed on the inner wall of the cylinder, and the end surfaces of two side surfaces of the high-tightness piston are tightly pressed on two end covers of the cylinder; the whole high-sealing piston is integrally provided with oil holes arranged on the top arc surface and two lateral surfaces of the upper part and the main engine oil channel on the upper part and the lower part of each of the two piston plates, and then the oil holes are communicated with the inner engine oil channel on the main rotating shaft of the engine of the four-stroke synchronous internal combustion engine, so that the high-sealing piston is easy to lubricate and high in sealing property in the cylinder of the two-cylinder matching type four-stroke synchronous internal combustion engine.

Compared with the piston device technology of the prior two-cylinder matching type four-stroke synchronous internal combustion engine, the piston of the invention is composed of a left piston plate and a right piston plate, and the left piston plate and the right piston plate are respectively divided into an upper part and a lower part. The upper part and the lower part of each of the left piston plate and the right piston plate are tightly matched with each other through a concave groove and a convex platform, and springs are arranged in the left piston plate and the right piston plate. The upper parts of the left and right piston plates are tightly matched with each other through a concave groove and a convex platform, and springs are arranged in the left and right piston plates. The lower parts of the left and right piston plates are tightly matched with each other through a concave groove and a convex platform, and springs are arranged in the left and right piston plates. Therefore, after the high-tightness piston is integrally extruded and loaded into the cylinder of the two-cylinder matching type four-stroke synchronous internal combustion engine from left to right and up and down, the circular arc surface at the top end of the upper part of the whole high-tightness piston is tightly pressed on the inner wall of the cylinder, and the end surfaces of two side surfaces of the high-tightness piston are tightly pressed on two end covers of the cylinder. The piston is integrated, and after the oil holes arranged on the top arc surface and two lateral surfaces of the upper part of the piston and the main engine oil channels on the upper part and the lower part of the two piston plates are communicated with each other, the piston is communicated with the inner engine oil channel on the main rotating shaft of the engine of the four-stroke synchronous internal combustion engine, so that the high-sealing piston has high lubricity and high sealing property in the cylinder of the two-cylinder matching type four-stroke synchronous internal combustion engine. Therefore, compared with the piston device of the existing two-cylinder matching type four-stroke synchronous internal combustion engine, the piston device has the advantages of easy lubrication and high sealing performance.

Description of the drawings:

fig. 1 is a schematic front view of a high-sealability piston device according to the present invention.

Fig. 2 is a schematic diagram of a left side view of a high-sealability piston assembly shown in fig. 1.

Fig. 3 is a schematic front view of a left piston plate of the high-sealability piston device shown in fig. 1.

Fig. 4 is a schematic diagram of the right side view of the left piston plate of fig. 3.

Fig. 5 is a schematic diagram of a left upper elevation view of the left piston plate of fig. 3.

Fig. 6 is a schematic diagram of the left upper right view of the left piston plate of fig. 3.

Fig. 7 is a schematic diagram of the left lower right view of the left piston plate of fig. 3.

Fig. 8 is a schematic diagram of a left lower elevation view of the left piston plate of fig. 3.

Fig. 9 is a schematic diagram of a left side view of a right piston plate of the high-sealability piston device shown in fig. 1.

Fig. 10 is a schematic front view of a right piston plate of the high-sealability piston device of fig. 1.

Fig. 11 is a schematic diagram of the right upper left side view of the right piston plate of fig. 10.

Fig. 12 is a schematic diagram of a right upper elevation view of the right piston plate of fig. 10.

Fig. 13 is a schematic diagram of a right lower left side view of the right piston plate of fig. 10.

Fig. 14 is a schematic diagram of a right lower elevation view of the right piston plate of fig. 10.

Fig. 15 is a schematic bottom view of the right upper portion of the right piston plate shown in fig. 12.

Fig. 16 is a schematic diagram of the left upper bottom view of the left piston plate shown in fig. 5.

The specific implementation mode is as follows:

referring to fig. 1, a left piston plate 1 and a right piston plate 3 are mutually matched to form an integral high-tightness piston. Referring to fig. 2, the high-sealability piston is integrally provided with a spindle hole 4 and machine oil holes 2 on the left and right side surfaces, and the spindle hole 4 is provided with a key groove 13. Referring to fig. 3, the left piston plate 1 is provided with a spring seat 8 and a fourth concave groove 19. Referring to fig. 4, 5, 6, 7, the left piston plate 1 is composed of a left upper portion 6 and a left lower portion 7. A slidable positioning pin 10 is arranged between the upper left portion 6 and the lower left portion 7 of the left piston plate 1, an engine oil hole is formed in the positioning pin 10, and a spring 9 is arranged on the positioning pin 10. The left upper part 6 of the left piston plate 1 is provided with a first convex surface platform 15 and a second concave surface groove 5, the left lower part 7 of the left piston plate 1 is provided with a third concave surface groove 16 and a fourth concave surface groove 19, the left upper part 6 and the left lower part 7 of the left piston plate 1 are tightly matched with each other through the first convex surface platform 15 and the third concave surface groove 16 to form a left piston plate 1, and the width and the depth of the second concave surface groove 5 and the fourth concave surface groove 19 are the same, so that the left integral concave surface groove of the left piston plate 1 is formed together. Referring to fig. 9, 10, 11, 12, 13, 14, the right piston plate 3 is composed of a right upper portion 14 and a right lower portion 11. A slidable positioning pin 10 is arranged between the upper portion 14 on the right side and the lower portion 11 on the right side of the right piston plate 3, an engine oil hole is formed in the positioning pin 10, and a spring 9 is arranged on the positioning pin 10. The upper right portion 14 of the right piston plate 3 is provided with a fifth convex surface platform 17 and a sixth convex surface platform 20, the lower right portion 11 of the right piston plate 3 is provided with a seventh concave surface groove 18 and an eighth convex surface platform 12, and the upper right portion 14 and the lower right portion 11 of the right piston plate 3 are tightly matched with each other through the fifth convex surface platform 17 and the seventh concave surface groove 18 to form a right piston plate 3. The sixth convex land 20 and the eighth convex land 12, both of which have the same width and height, together form the right overall convex land of the right piston plate 3. The left and right piston plates are mutually matched with the right integral convex platform through the left integral concave groove to form an integral high-tightness piston device. The upper left portion 6 and the lower left portion 7 of the left piston plate 1 are provided with an engine oil channel 21, the engine oil channels of the two portions are communicated with each other through engine oil holes of the positioning pins 10 to form a left engine oil channel, and the left engine oil channel is communicated with the spindle hole 4. The upper portion 14 and the lower portion 11 on the right of the right piston plate 3 are provided with a main engine oil channel 22, the two engine oil channels are mutually communicated through engine oil holes of the positioning pins 10 to form a right main engine oil channel, and the right main engine oil channel is communicated with the spindle hole 4. A spring 9 is arranged between the left lower part 7 of the left piston plate 1 and the right lower part 11 of the right piston plate 3, and a slidable positioning pin 10 and a spring 9 are arranged between the left upper part 6 of the left piston plate 1 and the right upper part 14 of the right piston plate 3.

In operation, the left upper part 6 and the left lower part 7 of the left piston plate 1 are tightly engaged with each other through the first convex surface platform 15 and the third concave surface groove 16 to form a left piston plate 1, and a slidable positioning pin 10 and a spring 9 are arranged between the left piston plate 1 and the third concave surface groove. The upper right portion 14 and the lower right portion 11 of the right piston plate 3 are tightly engaged with each other through the fifth convex surface 17 and the seventh concave surface groove 18 to form a right piston plate 3, and the slidable positioning pin 10 and the spring 9 are installed between the two. The fourth concave groove 19 on the left piston plate 1 is engaged with the eighth convex land 12 on the right piston plate 3, and the spring 9 is installed between them. The second concave groove 5 of the left piston plate 1 and the sixth convex land 20 of the right piston plate 3 are engaged with each other, and a slidable positioning pin 10 and a spring 9 are installed therebetween. The high sealing performance between the left, right, upper and lower joint surfaces of the integral piston is realized by the meshing of the concave groove and the convex platform, and the interior of the integral piston is pressed tightly on the end cover and the inner wall of the engine under the expansion pressure of the spring, so that the sealing performance of the piston in the cylinder is improved. The left piston plate 1 and the right piston plate 3 are provided with main engine oil channels, so that the top arc surface and two side surfaces of the upper part of the integral piston can be communicated with the engine oil channels between the main shaft holes, and therefore engine oil from the engine oil channels in the main rotating shaft cavity can be transmitted to the top arc surface and the two side surfaces of the upper part of the integral piston during working, and the lubrication and the sealing performance of the piston in the cylinder are improved.

In the typical embodiment, the high-tightness piston is 76mm high in whole, 32mm thick and 56mm in diameter of the lower semicircular disc, and the left piston plate 1 and the right piston plate are both 76mm high and 16mm thick in total. The first convex platform 15 on the left piston plate 1, and the sixth convex platform 20, the fifth convex platform 17, the eighth convex platform 12 of the right piston plate 3, all of which are 5mm high and 5mm wide. The second concave groove 5, the third concave groove 16, the fourth concave groove 19 on the left piston plate 1 and the seventh concave groove 18 on the right piston plate 3, all of which are 5.mm deep and 5.3mm wide. The aperture of the main shaft is 10mm. The distance between the left piston plate and the right piston plate in the engine is 0.3 mm.

Claims (6)

1. A piston with high sealing performance is composed of a positioning pin (10), a spring (9), a left piston plate (1) and a right piston plate (3) and is characterized in that the whole piston is composed of the left piston plate (1) and the right piston plate (3), the left piston plate (1) is composed of a left upper portion (6) and a left lower portion (7), the left upper portion (6) of the left piston plate (1) is provided with a first convex surface platform (15) and a second concave surface groove (5), the left lower portion (7) of the left piston plate (1) is provided with a third concave surface groove (16) and a fourth concave surface groove (19), the left upper portion (6) and the left lower portion (7) of the left piston plate (1) are mutually matched into the left piston plate (1) through the first convex surface platform (15) and the third concave surface groove (16), the second concave surface groove (5) and the fourth concave surface groove (19) which are the same in width and depth and jointly form a left integral concave surface groove (1), the left upper portion (3) of the left piston plate (1), the right upper portion (3) is provided with a right piston plate (3) and a right piston plate (14), the right upper portion (11) are provided with a fifth convex surface groove (11) and a right concave surface groove (11), the upper right part (14) and the lower right part (11) of the right piston plate (3) are mutually matched into a right piston plate (3) through a fifth convex surface platform (17) and a seventh concave surface groove (18), the width and the height of a sixth convex surface platform (20) and an eighth convex surface platform (12) are the same, the right integral convex surface platform of the right piston plate (3) is formed together, a slidable positioning pin (10) and a spring (9) are arranged between the joint surfaces of the upper right part (14) and the lower right part (11) of the right piston plate (3), the slidable positioning pin (10) and the spring (9) are arranged between the joint surfaces of the upper left part (6) and the lower left part (7) on the left piston plate (1), a slidable positioning pin (10) and a spring (9) are arranged between the upper left part (6) of the left piston plate (1) and the upper right part (14) of the right piston plate (3), a spring (9) is arranged between the lower left part (7) of the left piston plate (1) and the lower right part (11) of the right piston plate (3), the left piston plate and the right piston plate are mutually matched with the right integral convex platform through a left integral concave groove to form an integral high-tightness piston device, high tightness is realized between the left and right upper and lower joint surfaces of the integral piston due to the meshing of the concave groove and the convex platform, and the expansion pressure of the spring arranged in the integral piston enables the arc surface and the two side surfaces at the upper end of the integral piston to be tightly pressed on the end covers and the inner walls of the two side surfaces of an engine cylinder, the sealing performance of the piston in the cylinder is enhanced.

2. A high-tightness piston according to claim 1, characterized in that the left upper portion (6) and the left lower portion (7) of the left piston plate (1) of the high-tightness piston assembly are relatively slidable up and down.

3. The high-tightness piston according to claim 1, wherein the right upper portion (14) and the right lower portion (11) of the right piston plate (3) of the high-tightness piston assembly are relatively slidable up and down.

4. A high-tightness piston according to claim 1, wherein the left monobloc piston plate and the right monobloc piston plate of the high-tightness piston assembly are relatively slidable.

5. The piston of claim 1, wherein the main oil passage provided between the upper and lower portions of the left piston plate (1) and the right piston plate (3) of the high-sealing piston assembly is communicated with the oil hole of the top circular arc surface of the upper portion and the oil holes of the two side surfaces of the upper portion, so that the oil hole of the top circular arc surface of the upper portion of the integral piston and the oil holes of the two side surfaces of the upper portion are communicated with the oil passage of the spindle hole (4), and therefore, when the piston operates, oil from the oil passage of the inner cavity of the spindle can be transferred to the top circular arc surface of the upper portion and the two side surfaces of the integral piston, and the lubricity and the sealing property of the piston in the cylinder are improved.

6. The high-tightness piston according to claim 1, wherein the overall shape of the entire piston of the high-tightness piston assembly is, as viewed from the side, a semicircular disc plate at the lower portion, and then, the semicircular disc plate is transited to the top end of the upper portion along the left and right sides thereof with an oblique arc surface, and the top end surface is a segment of an arc surface.

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