CN210239864U

CN210239864U - Engine piston connecting rod assembly structure

Info

Publication number: CN210239864U
Application number: CN201920624831.4U
Authority: CN
Inventors: Dong Ji; 纪东; Zhiwei Chen; 陈志伟; Wenjian Wang; 王文建
Original assignee: Dongfeng Motor Corp
Current assignee: Dongfeng Motor Corp
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-04-03
Anticipated expiration: 2029-04-30

Abstract

The utility model discloses an engine piston link assembly structure, including piston and connecting rod, its characterized in that: the piston is fixedly connected with the piston, and the lower end of the connecting piece is in clamping fit with the upper end of the connecting rod in the axial direction and the radial direction of the piston; the piston and the connecting rod are connected more firmly, vibration between the piston and the connecting rod is reduced, and stability is good. The outer side of the oil ring is provided with an oil ring oil groove, when the piston reciprocates, the oil ring oil groove can scrape lubricating oil between the oil ring and the cylinder wall and form an oil film on the outer side of the piston, and meanwhile, a homopolar magnet is arranged between the piston and the cylinder wall, so that the friction force between the piston and the cylinder wall is reduced.

Description

Engine piston connecting rod assembly structure

Technical Field

The utility model relates to an engine technical field specifically indicates an engine piston link assembly structure.

Background

The piston is a reciprocating machine element in the cylinder body of the automobile engine, and the basic structure of the piston can be divided into a top part, a head part and a skirt part. The piston crown is the main part that makes up the combustion chamber and its shape is related to the combustion chamber form chosen. The gasoline engine mostly adopts a flat-top piston, and has the advantage of small heat absorption area. The top of the piston of a diesel engine is often provided with various pits, and the specific shape, position and size of the pits are required to be suitable for the requirements of mixture formation and combustion of the diesel engine.

However, in the existing piston connecting rod assembly structure, the friction force between the piston and the cylinder wall is large, the lubrication is insufficient, the piston and the connecting rod are generally connected through a pin, the looseness can occur after the operation time is long, and the connection mode is unstable.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the deficiencies of the prior art and providing an engine piston connecting rod assembly structure which is more firm in connection and reduces the friction force of a piston.

In order to achieve the above object, the utility model provides an engine piston link assembly structure, including piston and connecting rod, its characterized in that: still including setting up the piston with connecting piece between the connecting rod, the connecting piece respectively with connecting rod and piston fixed connection, the cooperation of equal joint in the axial of piston and footpath between connecting piece lower extreme and the connecting rod upper end.

Furthermore, a screw rod is arranged at the upper end of the connecting rod, a screw hole is formed in the connecting piece, and the screw rod is in threaded connection with the screw hole.

Furthermore, the lower end of the connecting piece is provided with a radial connecting piece groove, and the upper end of the connecting rod is embedded into the connecting piece groove and clamped with the connecting piece groove.

Furthermore, the edge of the upper end face of the connecting rod is radially provided with a positioning groove, a clamping pin is arranged in the positioning groove, and a spring is connected between the clamping pin and the bottom end of the positioning groove.

Furthermore, a bayonet lock convex block is arranged on the outer side of the bayonet lock, a limiting clamping groove is arranged on the side wall of the positioning groove, and the bayonet lock convex block is in limiting fit with the limiting clamping groove.

Furthermore, the edge of the lower end of the connecting piece is provided with a limiting groove, and the outer end of the clamping pin is clamped with the positioning groove.

Further, the connecting rod lower extreme includes the bearing housing, the bearing housing inboard is equipped with lubricated bearing.

Further, an oil ring oil groove is formed in the outer side of the oil ring, a connecting rod oil duct is arranged in the connecting rod, one end of the connecting rod oil duct is communicated with the oil ring oil groove through a connecting piece, and the other end of the connecting rod oil duct is abutted to the lubricating bearing.

Further, homopolar magnets are arranged in the piston and the cylinder wall in sliding fit with the piston.

The utility model has the advantages as follows:

1. the piston is firmly connected with the connecting rod, and the stability is good. Be equipped with the connecting piece between piston and the connecting rod, the connecting piece respectively with piston and connecting rod fixed connection, and the equal joint cooperation of connecting piece lower extreme and connecting rod upper end in axial and radial direction for it is more firm to be connected between piston and the connecting rod, has reduced vibrations between the two simultaneously, and stability is good.

2. The friction between the piston and the cylinder wall is small, and the service life is long. The outer side of the oil ring is provided with an oil ring oil groove, when the piston reciprocates, the oil ring oil groove can scrape lubricating oil between the oil ring and the cylinder wall and form an oil film on the outer side of the piston, and meanwhile, a homopolar magnet is arranged between the piston and the cylinder wall, so that the friction force between the piston and the cylinder wall is reduced.

Drawings

FIG. 1 is a front view of an engine piston link assembly configuration.

Fig. 2 is a top view of the link structure.

Fig. 3 is a front view of the link structure.

FIG. 4 is a close-up view of the detent structure.

Fig. 5 is a bottom view of the connector structure.

The components in the figures are numbered as follows: the oil-gas ring lubricating device comprises a gas ring 1, an oil ring 2, an oil ring oil groove 201, a piston 3, a connecting rod 4, a connecting rod oil channel 401, a screw 402, a positioning groove 403, a spring 404, a clamping pin 405, a clamping pin bump 406, a limiting clamping groove 407, a bearing housing 5, an upper housing 501, a lower housing 502, a lubricating bearing 6, a connecting piece 7, a screw hole 701, a connecting piece groove 702, a limiting groove 703, a cylinder wall 8 and a magnet 9.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings, which are not intended to limit the scope of the present invention.

As shown in fig. 1 to 5, an engine piston connecting rod assembly structure comprises a piston 3, a connecting rod 4 and a connecting piece 7 arranged between the piston 3 and the connecting rod 4, wherein the piston 3 and the connecting piece 7 are vulcanized into a whole, the upper end of the connecting rod 4 is provided with a screw 402, the connecting piece 7 is provided with a screw hole 701, and the screw 402 is in threaded connection with the screw hole 701; the lower end of the connecting piece 7 is provided with a radial connecting piece groove 702, and the upper end of the connecting rod 4 is embedded into and clamped with the connecting piece groove 702; a positioning groove 403 is radially formed in the edge of the upper end face of the connecting rod 4, a clamping pin 405 is arranged in the positioning groove 403, and a spring 404 is connected between the clamping pin 405 and the bottom end of the positioning groove 403; a bayonet lock convex block 406 is arranged on the outer side of the bayonet lock 405, a limiting clamping groove 407 is arranged on the side wall of the positioning groove 403, and the bayonet lock convex block 406 is in limiting fit with the limiting clamping groove 407; the edge of the lower end of the connecting piece 7 is provided with a limit groove 703, and the outer end of the bayonet 405 is clamped with the positioning groove 703. Like this, the equal joint cooperation of connecting piece lower extreme and connecting rod upper end in axial and radial direction for it is more firm to be connected between piston and the connecting rod, draws simultaneously to be equipped with the spring between round pin and the constant head tank, has reduced the vibrations between piston and the connecting rod, and stability is good.

In the technical scheme, the lower end of the connecting rod 4 comprises a bearing shell 5, and a lubricating bearing 6 is arranged on the inner side of the bearing shell 5; an oil ring oil groove 201 is formed in the outer side of the oil ring 2, a connecting rod oil duct 401 is arranged in the connecting rod 4, one end of the connecting rod oil duct 401 is communicated with the oil ring oil groove 201 through a connecting piece 7, and the other end of the connecting rod oil duct 401 is abutted to the lubricating bearing 6; homopolar magnets 9 are arranged in the piston 3 and a cylinder wall 8 in sliding fit with the piston 3. When the piston reciprocates, the oil ring oil groove can scrape lubricating oil between the oil ring and the cylinder wall and form an oil film outside the piston, and meanwhile, the homopolar magnet is arranged between the piston and the cylinder wall, so that the friction force between the piston and the cylinder wall is reduced.

Claims

1. An engine piston connecting rod assembly structure, includes piston (3) and connecting rod (4), its characterized in that: still including setting up piston (3) with connecting piece (7) between connecting rod (4), connecting piece (7) respectively with connecting rod (4) and piston (3) fixed connection, the equal joint cooperation in the axial of piston (3) and footpath between connecting piece (7) lower extreme and connecting rod (4) upper end.

2. The engine piston link assembly structure of claim 1, wherein: the connecting rod (4) upper end is equipped with screw rod (402), connecting piece (7) are opened screw hole (701), screw rod (402) with screw hole (701) threaded connection.

3. The engine piston link assembly structure of claim 2, wherein: the lower end of the connecting piece (7) is provided with a radial connecting piece groove (702), and the upper end of the connecting rod (4) is embedded into the connecting piece groove (702) and clamped with the connecting piece groove.

4. The engine piston link assembly structure of claim 3, wherein: the edge of the upper end face of the connecting rod (4) is radially provided with a positioning groove (403), a clamping pin (405) is arranged in the positioning groove (403), and a spring (404) is connected between the clamping pin (405) and the bottom end of the positioning groove (403).

5. The engine piston link assembly structure of claim 4, wherein: a clamping pin protruding block (406) is arranged on the outer side of the clamping pin (405), a limiting clamping groove (407) is arranged on the side wall of the positioning groove (403), and the clamping pin protruding block (406) is in limiting fit with the limiting clamping groove (407).

6. The engine piston link assembly structure of claim 5, wherein: the edge of the lower end of the connecting piece (7) is provided with a limit groove (703), and the outer end of the bayonet lock (405) is clamped with the positioning groove (403).

7. The engine piston link assembly structure of claim 1, wherein: the lower end of the connecting rod (4) comprises a bearing shell (5), and a lubricating bearing (6) is arranged on the inner side of the bearing shell (5).

8. The engine piston link assembly structure of claim 7, wherein: the oil ring is characterized in that a connecting rod oil duct (401) is arranged in the connecting rod (4), one end of the connecting rod oil duct (401) is communicated with an oil ring oil groove (201) arranged on the outer side of the oil ring (2) through a connecting piece (7), and the other end of the connecting rod oil duct is abutted to the lubricating bearing (6).

9. The engine piston link assembly structure of claim 8, wherein: and polar magnets (9) are arranged in the piston (3) and the cylinder wall (8) in sliding fit with the piston.