CN219345245U

CN219345245U - High-hardness wear-resistant crankshaft

Info

Publication number: CN219345245U
Application number: CN202320314767.6U
Authority: CN
Inventors: 王迪武
Original assignee: Taizhou Doli Crankshaft Co ltd
Current assignee: Taizhou Doli Crankshaft Co ltd
Priority date: 2023-02-24
Filing date: 2023-02-24
Publication date: 2023-07-14
Anticipated expiration: 2033-02-24

Abstract

The utility model provides a high-hardness wear-resistant crankshaft, and belongs to the field of machinery. The crankshaft solves the problem that the existing crankshaft is poor in strength and wear resistance under the working conditions of partial complexity and high strength. The high-hardness wear-resistant crankshaft comprises a crankshaft body, wherein the crankshaft body is provided with a front end and a rear end, one side of the front end is provided with a first connecting rod journal, a first main journal, a second connecting rod journal, a second main journal, a third connecting rod journal, a third main journal and a fourth connecting rod journal, a plurality of first annular grooves are uniformly distributed on the surface of the first connecting rod journal along the axial direction, the sections of the first annular grooves are provided with transition parts and limiting parts, steel balls are arranged in the limiting parts, a bearing bush is arranged on the outer side of the steel balls, the inner side surface of the bearing bush is provided with second annular grooves, the upper side surface and the lower side surface of the steel balls are respectively arranged in the limiting parts and the second annular grooves and can axially rotate along the axial direction of the first connecting rod journal, and a retainer is arranged on the left side surface and the right side surface of the steel balls. The utility model has the advantages of high crankshaft hardness, good wear resistance and long service life.

Description

High-hardness wear-resistant crankshaft

Technical Field

The utility model belongs to the field of machinery, and relates to a crankshaft, in particular to a high-hardness wear-resistant crankshaft.

Background

The crankshaft bears the force transmitted by the piston rod, and the reciprocating motion of the piston rod is converted into the rotary motion output of the crankshaft through the relative motion of the piston rod and the crankshaft journal and drives other accessories on the engine to work. The crankshaft is subjected to the centrifugal force of the rotating mass, the periodically-changing inertial force and the reciprocating inertial force, so that the crankshaft is subjected to bending and torsion loads, and therefore, the crankshaft is required to have enough strength and wear resistance, and particularly, the connecting rod journal and the main journal part are easy to break.

Therefore, a crankshaft with higher hardness and better wear resistance is currently required.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a crankshaft with higher hardness and better wear resistance.

The aim of the utility model can be achieved by the following technical scheme: the utility model provides a high hardness stand wear and tear bent axle, includes the bent axle body, the bent axle body have front end and rear end, front end one side from near to far have first connecting rod journal, first main shaft journal, second connecting rod journal, second main shaft journal, third connecting rod journal, third main shaft journal and fourth connecting rod journal in proper order, its characterized in that, first connecting rod journal surface along axial evenly distributed have a plurality of ring channel I, a plurality of ring channel I cross-section all have square transition portion and curved spacing portion, and install the steel ball rather than the radian the same in the spacing portion, the steel ball outside install the axle bush, the axle bush medial surface have the ring channel second that the radian is the same with the steel ball, steel ball upper and lower both sides face install respectively in spacing portion and ring channel second and can follow first connecting rod shaft axis axial rotation, steel ball left and right sides face install the holder.

In the high-hardness wear-resistant crankshaft, the bearing bush is provided with the upper bearing bush and the lower bearing bush, the piston rod assembly is arranged on the outer side of the upper bearing bush, and the fixing seat is arranged on the outer side of the lower bearing bush.

In the high-hardness wear-resistant crankshaft, the connecting positions of the two sides of the first connecting rod journal, the first main journal, the second connecting rod journal, the second main journal, the third connecting rod journal, the third main journal and the fourth connecting rod journal and the crank are provided with concave rolling fillets.

In the high-hardness wear-resistant crankshaft, a first oil passage is formed between the first main journal and the first connecting rod journal in the crankshaft, a second oil passage is formed between the second main journal and the second connecting rod journal in the crankshaft, a third oil passage is formed between the third main journal and the third connecting rod journal in the crankshaft, and a fourth oil passage is formed between the rear end of the crankshaft and the fourth connecting rod journal.

In the high-hardness wear-resistant crankshaft, the outer surface of the crankshaft body is provided with the metal coating, and the metal coating is made of tungsten carbide.

Compared with the prior art, the high-hardness wear-resistant crankshaft has the following advantages:

1. by arranging a plurality of groups of steel balls between the piston rod and the connecting rod journal, the transmission between the piston rod and the crankshaft is realized by means of the rotation of the steel balls and the circumferential rotation of the steel balls along the journal, and compared with the traditional direct contact transmission between the piston rod and the connecting rod journal, the abrasion at the connecting rod journal is reduced, and the service life of the crankshaft in actual work is greatly prolonged;

2. the rolling fillets are arranged on the two sides of the journal, so that the residual compressive stress generated by the rolling fillets can be partially offset with the tensile stress generated in the working process of the crankshaft, and the fatigue strength of the crankshaft is improved;

3. the hardness, wear resistance and corrosion resistance of the surface of the crankshaft are further improved by spraying a tungsten carbide coating on the surface of the crankshaft.

Drawings

FIG. 1 is a schematic cross-sectional view of the present high hardness wear resistant crankshaft.

Fig. 2 is a schematic perspective view of the connection of the piston rod and the crankshaft.

FIG. 3 is a layered schematic of a crankshaft material.

In the figure, 1, a crankshaft body; 2. a front end; 3. a rear end; 4. a first connecting rod journal; 5. a first main journal; 6. a second connecting rod journal; 7. a second main journal; 8. a third connecting rod journal; 9. a third main journal; 10. a fourth connecting rod journal; 11. an annular groove I; 12. a transition section; 13. a limit part; 14. a steel ball; 15. bearing bush; 16. annular groove II; 17. a retainer; 18. an upper bearing bush; 19. a lower bearing bush; 20. a piston rod assembly; 21. a fixing seat; 22. rolling round corners; 23. a first oil passage; 24. a second oil passage; 25. a third oil passage; 26. a fourth oil passage; 27. and (3) a metal coating.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1, 2 and 3, the high-hardness wear-resistant crankshaft comprises a crankshaft body 1, wherein the crankshaft body 1 is provided with a front end 2 and a rear end 3, one side of the front end 2 is sequentially provided with a first connecting rod journal 4, a first main journal 5, a second connecting rod journal 6, a second main journal 7, a third connecting rod journal 8, a third main journal 9 and a fourth connecting rod journal 10 from near to far, a plurality of first annular grooves 11 are uniformly distributed on the surface of the first connecting rod journal 4 along the axial direction, the sections of the first annular grooves 11 are provided with square transition parts 12 and arc-shaped limiting parts 13, steel balls 14 with the same radian are arranged in the limiting parts 13, bearing bushes 15 are arranged on the outer sides of the steel balls 14, annular grooves 16 with the same radian as the steel balls 14 are arranged on the inner side surfaces of the bearing bushes 15, the upper side and the lower side surfaces of the steel balls 14 are respectively arranged in the limiting parts 13 and the annular grooves 16 and can axially rotate along the axis of the first connecting journal 4, and a retainer 17 is arranged on the left side and right side surfaces of the steel balls 14.

Preferably, the bearing bush 15 is provided with an upper bearing bush 18 and a lower bearing bush 19, a piston rod assembly 20 is arranged outside the upper bearing bush 18, and a fixing seat 21 is arranged outside the lower bearing bush 19.

Preferably, the joints of the two sides of the first connecting rod journal 4, the first main journal 5, the second connecting rod journal 6, the second main journal 7, the third connecting rod journal 8, the third main journal 9 and the fourth connecting rod journal 10 and the crank are provided with concave rolling fillets 22.

Preferably, a first oil passage 23 is formed in the crankshaft between the first main journal 5 and the first connecting rod journal 4, a second oil passage 24 is formed in the crankshaft between the second main journal 7 and the second connecting rod journal 6, a third oil passage 25 is formed in the crankshaft between the third main journal 9 and the third connecting rod journal 8, and a fourth oil passage 26 is formed in the crankshaft between the rear end 3 and the fourth connecting rod journal 10.

Further, the outer surface of the crankshaft body 1 is provided with a metal coating 27 for improving the hardness, and the metal coating 27 is made of tungsten carbide.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Although terms of the crankshaft body 1, the front end 2, the rear end 3, the first connecting rod journal 4, the first main journal 5, the second connecting rod journal 6, the second main journal 7, the third connecting rod journal 8, the third main journal 9, the fourth connecting rod journal 10, the annular groove one 11, the transition portion 12, the stopper portion 13, the steel ball 14, the bearing shell 15, the annular groove two 16, the cage 17, the upper bearing shell 18, the lower bearing shell 19, the piston rod assembly 20, the fixing seat 21, the rolling fillet 22, the first oil passage 23, the second oil passage 24, the third oil passage 25, the fourth oil passage 26, the metal coating 27, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.

Claims

1. The utility model provides a high hardness stand wear and tear bent axle, includes bent axle body (1), bent axle body (1) have front end (2) and rear end (3), front end (2) one side from nearly to far first connecting rod journal (4), first main journal (5), second connecting rod journal (6), second main journal (7), third connecting rod journal (8), third main journal (9) and fourth connecting rod journal (10) have, a plurality of ring channel one (11) along axial evenly distributed, a plurality of ring channel one (11) cross-section all have square transition portion (12) and curved spacing portion (13), and install steel ball (14) rather than the radian the same in spacing portion (13), steel ball (14) outside install axle bush (15), bearing bush (15) medial surface have ring channel two (16) the radian the same with steel ball (14), steel ball (14) upper and lower both sides face install respectively in spacing portion (13) and two ring channel one (16) and two axial sides that keep axle-piece (17) can be installed along first connecting rod journal (14) axial.

2. The high-hardness wear-resistant crankshaft according to claim 1, wherein the bearing bush (15) is provided with an upper bearing bush (18) and a lower bearing bush (19), a piston rod assembly (20) is arranged on the outer side of the upper bearing bush (18), and a fixing seat (21) is arranged on the outer side of the lower bearing bush (19).

3. The high-hardness wear-resistant crankshaft according to claim 1, wherein the connecting rod journals (4, 5, 6, 7, 8, 9 and 10) are provided with concave rolling fillets (22) at the joints of the crank and the two sides thereof.

4. The high-hardness wear-resistant crankshaft according to claim 1, characterized in that a first oil passage (23) is formed between the first main journal (5) and the first connecting rod journal (4), a second oil passage (24) is formed between the second main journal (7) and the second connecting rod journal (6), a third oil passage (25) is formed between the third main journal (9) and the third connecting rod journal (8), and a fourth oil passage (26) is formed between the rear end (3) and the fourth connecting rod journal (10).

5. The high-hardness wear-resistant crankshaft as claimed in claim 1, wherein the outer surface of the crankshaft body (1) is provided with a metal coating (27), and the metal coating (27) is made of tungsten carbide.