CN213954321U

CN213954321U - Piston pin capable of changing compression ratio of engine

Info

Publication number: CN213954321U
Application number: CN202022377872.3U
Authority: CN
Inventors: 廖玲娜
Original assignee: Chongqing Jiling Machinery Parts Co ltd
Current assignee: Chongqing Jiling Machinery Parts Co ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-08-13
Anticipated expiration: 2030-10-23

Abstract

The utility model discloses a piston pin capable of changing the compression ratio of an engine, which comprises a first piston pin ring main body and a second piston pin ring main body, wherein the outer surfaces of the bottoms of the two sides of the first piston pin ring main body are fixedly connected with connecting cylinders; the outer surfaces of the tops of the two sides of the second piston pin ring main body are fixedly connected with connecting rods at positions corresponding to the connecting cylinders; the inside fixedly connected with expanding spring in connecting rod one side, the utility model discloses in, through being provided with devices such as fastening bolt, connecting cylinder, connecting rod, first threaded connection hole and second bolted connection hole, wherein the quantity of first threaded connection hole and second bolted connection hole is three groups, make three gear can be adjusted to piston round pin subassembly itself, can realize the compression ratio of three gear and adjust, only need through fastening bolt with connecting cylinder and connecting rod looks fixed connection, can realize the regulation of piston round pin subassembly, finally realize compressing the regulation of ratio, be worth wideling popularize.

Description

Piston pin capable of changing compression ratio of engine

Technical Field

The utility model relates to a piston pin technical field especially relates to a can change piston pin that engine compression ratio was pressed.

Background

An Engine (Engine) is a machine capable of converting other forms of energy into mechanical energy, including, for example, an internal combustion Engine (reciprocating piston Engine), an external combustion Engine (stirling Engine, steam Engine, etc.), a jet Engine, an electric motor, etc., and the compression ratio of the Engine is a technical parameter of the Engine, and can be roughly indicated by the power and torque, but many factors affecting the power and torque output exist, one of the important factors is the compression ratio of the Engine, which indicates the degree of compression of the gas in a cylinder when the piston moves from a bottom dead center to a top dead center, and is indicated by epsilon, wherein the compression ratio is mainly changed by the piston, the piston comprises a piston main body, a connecting rod and a piston pin, and the piston pin is a cylindrical pin mounted on the skirt of the piston, and the middle part of the piston pin passes through a connecting rod small-head hole and is used for connecting the piston and the connecting rod, the piston pin is made of high-quality alloy steel and is hollow in order to reduce weight.

The compression ratio of the existing engine is basically changed by changing a piston main body and a connecting rod, and the compression ratio of the engine is changed in sequence, but the piston main body and the connecting rod are large in size, high in processing difficulty and troublesome to change, so that a novel piston pin capable of changing the compression ratio of the engine needs to be designed to solve the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a piston pin capable of changing the compression ratio of an engine.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a piston pin capable of changing the compression ratio of an engine comprises a first piston pin ring main body and a second piston pin ring main body, wherein the outer surfaces of the bottoms of two sides of the first piston pin ring main body are fixedly connected with connecting cylinders;

the outer surfaces of the tops of the two sides of the second piston pin ring main body are fixedly connected with connecting rods at positions corresponding to the connecting cylinders;

the telescopic connecting rod is characterized in that a telescopic spring is fixedly connected inside one side of the connecting rod, a groove is formed in the connecting rod at a position corresponding to the telescopic spring, a sleeve is fixedly connected to the tail end of one side of the telescopic spring, and a fastening bolt is connected to the inner side wall of the sleeve in a threaded mode.

As a further description of the above technical solution:

the first piston pin ring main body and the second piston pin ring main body are symmetrically distributed, and a piston pin assembly is formed between the first piston pin ring main body and the second piston pin ring main body.

As a further description of the above technical solution:

the connecting rod and the second piston pin ring main body and the connecting cylinder and the first piston pin ring main body are fixedly connected through welding.

As a further description of the above technical solution:

a groove is formed in the connecting cylinder, a first threaded connecting hole and a positioning groove are formed in one side of the connecting cylinder and correspond to the fastening bolt and the sleeve respectively, and a second threaded connecting hole is formed in the other side of the connecting cylinder and correspond to the fastening bolt.

As a further description of the above technical solution:

the first threaded connecting hole is communicated with the positioning groove.

As a further description of the above technical solution:

the number of the second threaded connecting holes is three, and every two adjacent groups of the second threaded connecting holes are parallel to each other.

The utility model discloses following beneficial effect has:

1. the utility model provides a can change piston pin that engine compression ratio compares with traditional device, through being provided with devices such as sleeve, constant head tank, expanding spring and recess, expanding spring is connected with the sleeve, pushes up the sleeve into the constant head tank through expanding spring, realizes the location of connecting rod and connecting cylinder, the fastening bolt's of being convenient for fixed connection, the device simple structure, convenient and practical.

2. The device compares with traditional device, its structure and design all have great innovation and improvement, through being provided with fastening bolt, the connecting cylinder, the connecting rod, devices such as first threaded connection hole and second bolted connection hole, wherein the quantity of first threaded connection hole and second bolted connection hole is three groups, make the piston round pin subassembly itself can adjust three gear, can realize the compression ratio of three gear and adjust, only need through fastening bolt with connecting cylinder and connecting rod looks fixed connection, can realize the regulation of piston round pin subassembly, finally realize the regulation to compressing ratio, be worth wideling popularize.

Drawings

FIG. 1 is a front view of a piston pin with changeable engine compression ratio according to the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a partially enlarged view of fig. 2 at B.

Illustration of the drawings:

1. a first piston pin ring body; 2. a connecting rod; 3. a second piston pin ring body; 4. a second threaded connection hole; 5. fastening a bolt; 6. a first threaded connection hole; 7. a connecting cylinder; 8. a groove; 9. a tension spring; 10. a sleeve; 11. positioning a groove; 12. a profiled groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-3, the present invention provides an embodiment: a piston pin capable of changing the compression ratio of an engine comprises a first piston pin ring main body 1 and a second piston pin ring main body 3, wherein the outer surfaces of the bottoms of two sides of the first piston pin ring main body 1 are fixedly connected with connecting cylinders 7; the outer surfaces of the tops of the two sides of the second piston pin ring main body 3 are fixedly connected with connecting rods 2 at positions corresponding to the connecting cylinders 7; the inside fixedly connected with expanding spring 9 in connecting rod 2 one side, connecting rod 2 is inside to be seted up fluted 8 with the corresponding position of expanding spring 9, and the terminal fixedly connected with sleeve 10 in expanding spring 9 one side, sleeve 10 inside wall threaded connection have fastening bolt 5.

The first piston pin ring main body 1 and the second piston pin ring main body 3 are symmetrically distributed, piston pin assemblies are formed between the first piston pin ring main body 1 and the second piston pin ring main body 3, the connecting rod and the piston main bodies are convenient to connect, the connecting rod 2, the second piston pin ring main body 3, the connecting cylinder 7 and the first piston pin ring main body 1 are fixedly connected through welding, the welding cost is low, the connecting strength is high, a profiled groove 12 is formed in the connecting cylinder 7, a first threaded connecting hole 6 and a locating groove 11 are respectively formed in one side of the connecting cylinder 7 corresponding to the fastening bolt 5 and the sleeve 10, a second threaded connecting hole 4 is formed in the other side of the connecting cylinder 7 corresponding to the fastening bolt 5, the fastening bolt 5 is convenient to fixedly connect the connecting rod 2 and the connecting cylinder 7 through the first threaded connecting hole 6 and the second threaded connecting hole 4, the locating groove 11 is matched with the sleeve 10, so that the connecting rod 2 and the connecting cylinder 7 can be quickly positioned, first threaded connection hole 6 and constant head tank 11 between link up each other and be connected, the quantity of second threaded connection hole 4 is three groups, is parallel to each other between every adjacent two sets of second threaded connection hole 4 for three gear can be adjusted to piston pin subassembly itself, is convenient for adapt to the connection requirement between different connecting rods and the piston main part.

The working principle is as follows: the utility model provides a can change piston pin that engine compression ratio has great improvement innovation with traditional device, when using this can change piston pin that engine compression ratio, makes the regulation to the position of connecting rod 2 and connecting cylinder 7 according to the demand, and the accommodation process is: at first unscrew fastening bolt 5, then manual promotion second piston round pin ring main part 3, make sleeve 10 and constant head tank 11 cooperation on the connecting rod 2, because sleeve 10 and expanding spring 9 looks fixed connection, expanding spring 9 pushes up sleeve 10 into constant head tank 11, accomplish the location fit between connecting rod 2 and the connecting cylinder 7, later twist fastening bolt 5 into and realize the fixed between connecting rod 2 and the connecting cylinder 7, push into between connecting rod and the piston main part with the piston round pin subassembly that has adjusted again, adapt to different piston main parts and connecting rod, compress ratio in order to change.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. A piston pin for varying the compression ratio of an engine, comprising a first piston pin ring body (1) and a second piston pin ring body (3), characterized in that: the outer surfaces of the bottoms of the two sides of the first piston pin ring main body (1) are fixedly connected with connecting cylinders (7);

the outer surfaces of the tops of the two sides of the second piston pin ring main body (3) are fixedly connected with a connecting rod (2) at a position corresponding to the connecting cylinder (7);

the connecting rod (2) is characterized in that an expansion spring (9) is fixedly connected to the inside of one side of the connecting rod (2), a groove (8) is formed in the position, corresponding to the expansion spring (9), of the inside of the connecting rod (2), a sleeve (10) is fixedly connected to the tail end of one side of the expansion spring (9), and a fastening bolt (5) is connected to the inner side wall of the sleeve (10) in a threaded mode.

2. A piston pin for varying the compression ratio of an engine according to claim 1, characterized in that: the piston pin assembly is characterized in that the first piston pin ring main body (1) and the second piston pin ring main body (3) are symmetrically distributed, and the first piston pin ring main body (1) and the second piston pin ring main body (3) form a piston pin assembly.

3. A piston pin for varying the compression ratio of an engine according to claim 1, characterized in that: the connecting rod (2) is fixedly connected with the second piston pin ring main body (3) and the connecting cylinder (7) is fixedly connected with the first piston pin ring main body (1) through welding.

4. A piston pin for varying the compression ratio of an engine according to claim 1, characterized in that: a profiled groove (12) is formed in the connecting cylinder (7), a first threaded connecting hole (6) and a locating groove (11) are formed in one side of the connecting cylinder (7) and in positions corresponding to the fastening bolt (5) and the sleeve (10) respectively, and a second threaded connecting hole (4) is formed in the other side of the connecting cylinder (7) and in positions corresponding to the fastening bolt (5).

5. A piston pin capable of changing the compression ratio of an engine according to claim 4, characterized in that: the first threaded connecting hole (6) is communicated with the positioning groove (11).

6. A piston pin capable of changing the compression ratio of an engine according to claim 4, characterized in that: the number of the second threaded connecting holes (4) is three, and every two adjacent groups of the second threaded connecting holes (4) are parallel to each other.