CN217152947U

CN217152947U - Energy-saving piston pin for diesel engine

Info

Publication number: CN217152947U
Application number: CN202220941935.XU
Authority: CN
Inventors: 徐小敏
Original assignee: Heyuan Yueshun Power Parts Manufacturing Co ltd
Current assignee: Heyuan Yueshun Power Parts Manufacturing Co ltd
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2022-08-09
Anticipated expiration: 2032-04-22

Abstract

An energy-saving piston pin for a diesel engine comprises a piston pin main body, wherein an inner through hole is formed in the piston pin main body along the axial lead of the piston pin main body, the piston pin main body comprises a straight rod part, a left end part and a right end part, the left end part and the right end part are erected on a left piston pin hole and a right piston pin hole of a piston, the straight rod part is provided with a straight through hole, the left end part and the right end part are respectively provided with a left expanding opening and a right expanding opening which are communicated with the straight through hole and are in a double-cone shape, and the straight through hole, the left expanding opening and the right expanding opening form the inner through hole. The energy-saving piston pin is ideal in structural design, improved on the basis of the original piston pin, and designed by respectively arranging the left and right enlarged openings which are communicated with the straight through hole and have double cones at the left and right end parts, so that the whole weight of the piston pin is reduced, the energy consumption is low, the piston pin is energy-saving and environment-friendly, and the overall strength performance of the piston pin cannot be influenced because the left and right enlarged openings are positioned outside the corresponding left and right piston pin hole transverse depths of 20mm (namely the bearing surface).

Description

Energy-saving piston pin for diesel engine

Technical Field

The utility model relates to a diesel engine's spare part specifically indicates an energy-saving piston pin for diesel engine.

Background

In recent years, diesel engines have been developed in a direction of high power, high load and light weight, and accordingly, higher requirements are made on weight, strength, reliability and the like of piston pins, which requires continuous innovation and optimization in structure and material. The piston pin is a cylindrical pin arranged in the piston pin hole, the middle part of the piston pin penetrates through the small end hole of the connecting rod to be used for connecting the piston and the connecting rod, and the piston pin has the function of transmitting the acting force of fuel oil explosion borne by the piston to the connecting rod or enabling the small end of the connecting rod to drive the piston to move together. Piston pins are typically made of high quality alloy steel (e.g., low carbon alloy steel) and are hollow for weight reduction. Reference is made to the description accompanying fig. 6. The existing piston pin generally comprises a piston pin main body 1, the structural shape of the piston pin main body 1 is generally a thick-wall hollow cylindrical shape, the shape of the inner through hole 10 is like a common cylindrical shape, the shaped piston pin is integrally heavier, the energy consumption is high, the energy is not energy-saving and environment-friendly enough, and when a diesel engine runs at a high speed for a long time, the existing piston pin is not enough in strength, and the piston pin is easy to bend, elastically deform (even crack and the like of the inner through hole of the piston pin) to cause damage.

SUMMERY OF THE UTILITY MODEL

The utility model provides an energy-saving piston pin for diesel engine, its aim at mainly overcome present piston pin wholly heavier, the energy consumption is big, and is not energy-concerving and environment-protective enough, and it is easy to appear bending deformation and leads to shortcomings such as its damage moreover.

In order to solve the technical problem, the technical scheme of the utility model as follows:

an energy-saving piston pin for a diesel engine comprises a piston pin main body, wherein an inner through hole is formed in the piston pin main body along the axial lead of the piston pin main body, the piston pin main body comprises a straight rod part, a left end part and a right end part, the left end part and the right end part are erected on a left piston pin hole and a right piston pin hole of a piston, the straight rod part is provided with a straight through hole, the left end part and the right end part are respectively provided with a left expanding opening and a right expanding opening which are communicated with the straight through hole and are in a double-cone shape, and the straight through hole, the left expanding opening and the right expanding opening form the inner through hole.

Further, the left and right enlarged openings each have a length less than the lateral depth of the corresponding left and right piston pin bores, and are each located beyond 20mm of the lateral depth of the corresponding left and right piston pin bores.

Furthermore, the straight through hole is a stepped inner through hole, the inner wall of the straight rod part is provided with a circle of convex ring part, the convex ring part and the straight rod part are integrally formed, and the length of the convex ring part is controlled to be 10-20 mm.

Furthermore, the left and right enlarged openings respectively comprise a cylindrical straight opening, a first conical opening and a second conical opening from outside to inside, and the taper of the first conical opening is smaller than that of the second conical opening.

Further, the length of the cylindrical straight opening is controlled to be 1.5 mm.

Further, the straight rod part, the left end part and the right end part are of an integrally formed structure.

Furthermore, the length of the piston pin main body is 0.2 mm less than the distance between the inner sides of the clamp spring grooves at the two ends of the left and right piston pin holes of the piston; the lengths of the left and right enlarged openings are controlled to be 10-12mm under the condition that the transverse bearing length of the left and right piston pin holes of the piston is 20 mm.

From the above description of the present invention, compared with the prior art, the advantages of the present invention lie in: the energy-saving piston pin is ideal in structural design, improved on the basis of the original piston pin, and has the advantages that the left end part and the right end part are respectively provided with the left expanding opening and the right expanding opening which are communicated with the stepped straight through hole and are in a double-cone shape and a cylinder shape with the diameter of 1.5mm, so that the whole weight is reduced, the energy consumption is low, the energy is saved, the environment is protected, and the whole strength performance cannot be influenced because the left expanding opening and the right expanding opening are positioned outside the transverse depth of the corresponding left piston pin hole and the corresponding right piston pin hole of the piston by 20mm (namely the bearing surface). The design of the circle of the convex ring part is adopted, when the piston pin is pulled by the connecting rod, the piston pin is strengthened, the strength of the piston pin is improved, the elastic deformation of the piston pin can be effectively reduced, the piston pin is not easy to generate bending elasticity or fatigue deformation to cause damage when the diesel engine runs at a high speed for a long time, and the service life of the piston pin is prolonged.

Drawings

Fig. 1 is a schematic view of a front view direction of the present embodiment.

Fig. 2 is a schematic view of a top view of the present embodiment.

Fig. 3 is a reference diagram of the usage status of the present invention.

Fig. 4 is a schematic view of two front view directions of the present embodiment.

Fig. 5 is a schematic diagram of the second embodiment in a top view.

Fig. 6 is a schematic view of a conventional piston pin.

Detailed Description

The following describes a specific embodiment of the present invention with reference to fig. 1 to 5.

Example one

Reference is made to figures 1, 2 and 3. An energy-saving piston pin for a diesel engine comprises a piston pin main body 1, wherein the piston pin main body 1 is provided with an inner through hole along the axial lead of the piston pin main body 1, the piston pin main body 1 comprises a straight rod part 11, a left end part 12 and a right end part 13, the left end part 12 and the right end part 13 are erected on a left piston pin hole 21 and a right piston pin hole 22 of a piston 2, the straight rod part 11 is provided with a straight through hole 110, the left end part 12 and the right end part 13 are respectively provided with a left expanding opening 120 and a right expanding opening 130 which are communicated with the straight through hole 110 and are in a double-cone shape, and the straight through hole 110 and the left expanding opening 120 and the right expanding opening 130 form the inner through hole. The left and right enlarged

openings

120, 130 each have a length less than the lateral depth of the corresponding left and right piston pin bores 21, 22, and the left and right enlarged

openings

120, 130 are each located beyond the lateral depth of the corresponding left and right piston pin bores 21, 22 by 20mm (i.e., bearing surface).

Reference is made to figures 1 and 2. The length of the piston pin main body 1 is 0.2 mm smaller than the distance between the inner sides of the jump ring grooves at the two ends of the left and right piston pin holes 21 and 22 of the piston 2; the lengths of the left and right enlarged openings are controlled to be 10-12mm (for example, the length is 11 mm) under the condition that the transverse bearing length of the left and right piston pin holes 21 and 22 of the piston 2 is 20 mm. The left and right enlarged

openings

120 and 130 include a cylindrical straight opening from the outside to the inside, a first conical opening and a second conical opening, and the taper of the first conical opening is smaller than that of the second conical opening. The straight rod part 11, the left end part 12 and the right end part 13 are of an integrally formed structure. The length of the cylindrical straight opening is 1.5mm, the design of the left and right expanding

openings

120 and 130 with different tapers and double cones is adopted, and the bearing capacity is larger as the straight rod part 11 is closer, so the taper of the second conical opening is larger than that of the first conical opening, the integral strength performance of the product is not easily influenced, and the use safety of the product is good; meanwhile, the weight of the product can be reduced to the maximum extent, the energy consumption is low, and the energy is saved and the environment is protected.

Example two

Reference is made to fig. 4 and 5. The present embodiment is substantially the same as the first embodiment, except that: the through hole 110 is a stepped inner through hole, a circle of convex ring part 111 is arranged on the inner wall of the straight rod part 11, the circle of convex ring part 111 and the straight rod part 11 are integrally formed, and the circle of convex ring part 111 is located at the center of the inner wall of the straight rod part 11. The length of the convex ring part 111 is controlled to be 10-20mm (the optimal length is 15 mm). By adopting the design of the circle of the convex ring part 111, when the connecting rod 3 pulls the piston pin 2, the piston pin main body 1 is strengthened in the reinforcing rib effect, the bearing strength of the piston pin is improved, the elastic deformation of the piston pin can be effectively reduced, the piston pin is not easy to be damaged due to the bending elastic deformation or fatigue deformation when the diesel engine runs at a high speed for a long time, and the service life of the piston pin is prolonged.

The above-mentioned be the utility model discloses a concrete implementation way, nevertheless the utility model discloses a design concept is not limited to this, and the ordinary use of this design is right the utility model discloses carry out immaterial change, all should belong to the act of infringement the protection scope of the utility model.

Claims

1. The utility model provides an energy-saving piston pin for diesel engine, includes the piston pin main part, this piston pin main part has seted up interior through-hole along its axial lead, its characterized in that: the piston pin main body comprises a straight rod part, a left end part and a right end part, wherein the left end part and the right end part are erected on a left piston pin hole and a right piston pin hole of the piston, the straight rod part is provided with a straight through hole, the left end part and the right end part are respectively provided with a left expanding opening and a right expanding opening which are communicated with the straight through hole and are in a double-cone shape, and the straight through hole, the left expanding opening and the right expanding opening form the inner through hole.

2. An energy saving piston pin for diesel engines according to claim 1, characterized in that: the length of the left and right enlarged openings is smaller than the transverse depth of the corresponding left and right piston pin holes, and the left and right enlarged openings are located beyond 20mm of the transverse depth of the corresponding left and right piston pin holes.

3. An energy saving piston pin for diesel engines according to claim 1 or 2, characterized in that: the straight through hole is a step inner through hole, the inner wall of the straight rod part is provided with a circle of convex ring part, the convex ring part and the straight rod part are integrally formed, and the length of the convex ring part is controlled to be 10-20 mm.

4. An energy saving piston pin for diesel engines according to claim 1 or 2, characterized in that: the left and right expansion openings comprise cylindrical straight openings from outside to inside, first conical openings and second conical openings, and the conicity of the first conical openings is smaller than that of the second conical openings.

5. An energy saving piston pin for diesel engines according to claim 1, characterized in that: the straight rod part, the left end part and the right end part are of an integrally formed structure.

6. An energy saving piston pin for diesel engines according to claim 1 or 2, characterized in that: the length of the piston pin main body is 0.2 mm smaller than the distance between the inner sides of the clamp spring grooves at the two ends of the left piston pin hole and the right piston pin hole of the piston; the lengths of the left and right enlarged openings are controlled to be 10-12mm under the condition that the transverse bearing length of the left and right piston pin holes of the piston is 20 mm.