CN216429709U

CN216429709U - Sprocket wheel integrated camshaft

Info

Publication number: CN216429709U
Application number: CN202220052022.2U
Authority: CN
Inventors: 郑林; 张立成; 吉剑育; 周鹏博
Original assignee: Zhejiang Qianjiang Motorcycle Co Ltd
Current assignee: Zhejiang Qianjiang Motorcycle Co Ltd
Priority date: 2022-01-05
Filing date: 2022-01-05
Publication date: 2022-05-03
Anticipated expiration: 2032-01-05

Abstract

The utility model provides a sprocket integral type camshaft belongs to camshaft technical field. It has solved and has realized the problem of lightweight on the basis of guaranteeing current camshaft structural strength. This sprocket integral type camshaft includes the body, and the one end of body is equipped with the annular portion that deviates from body one side diameter grow gradually, and the tip of annular portion is equipped with radial outside annular bellied convex part that is, has evenly distributed's tooth on the outer peripheral face of convex part, body, annular portion and convex part three integrated into one piece. This design reduces some in order to increase the joint strength of camshaft and sprocket and the structure that designs through uniting two into one camshaft and sprocket integrated into one piece, retrencies the structure on the structural strength's of guaranteeing this camshaft basis and reduces the weight of camshaft and sprocket combination.

Description

Sprocket wheel integrated camshaft

Technical Field

The utility model belongs to the technical field of the camshaft, a camshaft is related to, especially, relate to a sprocket integral type camshaft.

Background

The engine camshaft is used for transmitting power to the air valve, a chain wheel is fixed at one end of the camshaft, and the chain wheel is connected with an engine output shaft through a chain. In the design of a conventional engine, a camshaft and a chain wheel are of a split structure and are generally fixed in an interference mode, a bolt mode, a flange plate mode and the like.

Generally in order to ensure the joint strength of camshaft and sprocket, all can have bellied installation position on the outer peripheral face of camshaft, then also have on the sprocket medial surface with installation position complex connection position, overlap connecting portion on the installation position, the thickness at installation position stack connection position is greater than the wall thickness of camshaft far away, mean that its quality is also great, still need install a plurality of bolts additional when necessary and strengthen structural strength, a set of complicated connection structure can increase more weight for camshaft and sprocket like this, after the camshaft is fixed on the camshaft bearing frame, the sprocket cam assembly of great quality can make the coefficient of friction between it and the support uprise.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a sprocket integral type camshaft. It is solved and is realized lightweight technical problem on the basis of guaranteeing current camshaft structural strength.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a sprocket integral type camshaft, includes the body, its characterized in that, the one end of body is equipped with the annular portion that deviates from body one side diameter grow gradually, the tip of annular portion is equipped with and radially outwards is the bellied convex part of annular, has evenly distributed's tooth on the outer peripheral face of convex part, body, annular portion and convex part three integrated into one piece.

This design reduces some in order to increase the joint strength of camshaft and sprocket and the structure that designs through uniting two into one camshaft and sprocket integrated into one piece, retrencies the structure on the structural strength's of guaranteeing this camshaft basis and reduces the weight of camshaft and sprocket combination.

Because the diameter of sprocket is far greater than the diameter of camshaft, the annular portion of this design at the tip design diameter grow gradually of camshaft, enlarge the diameter of camshaft slowly through annular portion, then replace the sprocket through bellied convex part and the tooth of design on the convex part outer peripheral face after enlarging to certain size, can play the same technological effect with the sprocket like this, the camshaft, annular portion and convex part three integrated into one piece, on the basis of having guaranteed structural strength, whole camshaft's structure has been retrencied, greatly reduced the quality of this sprocket integral type camshaft.

In the above-mentioned sprocket integrated camshaft, the junction between the outer side surface of the annular portion and the outer peripheral surface of the main body is provided with an inward concave surface.

The shape of concave cambered surface is adopted to replace direct intersection in the handing-over department of annular portion and body outer peripheral face, and the stress that elimination that design can be fine produced in the butt joint position when this camshaft rotates like this for structural strength is also very high when this camshaft quality is lower.

In the above-mentioned sprocket-integrated camshaft, an arc-shaped surface is provided at a junction between the outer side surface of the annular portion and the side surface of the protruding portion.

Articulated department on the surface of annular portion and convex part is the arcwall face, designs like this and actually plays the same effect with the indent cambered surface, and the stress between elimination annular portion and the convex part that also can be fine for structural strength is higher when this camshaft's quality is lower.

In the above-mentioned sprocket-integrated camshaft, weight reduction grooves are formed in both side portions of the convex portion.

The convex part is similar to a split chain wheel disc, the main function of the convex part is used for sleeving a chain, the force generated by sleeving the chain on the convex part is radial, and the two sides of the convex part are basically not acted by force, so that the weight reduction grooves are designed on the two sides of the convex part on the basis of not influencing the structural strength of the convex part, and the quality of the camshaft can be effectively reduced.

In the above-mentioned sprocket-integrated camshaft, at least one cam portion is provided on the outer peripheral surface of the body, and the cam portion is integrally formed with the camshaft.

The cam part of the cam shaft and the cam shaft are also integrally formed, and one cam shaft integrates three functions of a shaft, a cam and a chain wheel, so that the cam shaft has the advantages of simple structure, high strength, small mass and the like.

Compared with the prior art, the product has the advantages that:

1. this design reduces some in order to increase the joint strength of camshaft and sprocket and designs the structure through uniting two into one camshaft and sprocket integrated into one piece, retrencies the structure on the basis of guaranteeing structural strength and reduces the weight of camshaft and sprocket combination.

2. This design is at the annular part of the tip design diameter grow gradually of camshaft, enlargies the diameter of camshaft slowly through annular part, then replaces the sprocket through bellied convex part and the tooth of design on the convex part outer peripheral face after enlargiing certain size, has retrencied the structure of whole camshaft, greatly reduced the quality of this sprocket integral type camshaft.

3. The cam part of the cam shaft and the cam shaft are also integrally formed, and one cam shaft integrates three functions of a shaft, a cam and a chain wheel, so that the cam shaft has the advantages of simple structure, high strength, small mass and the like.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a half sectional view of the present invention.

In the figure, 1, a body; 11. an annular portion; 12. a convex portion; 13. teeth; 14. an inner concave cambered surface; 15. an arc-shaped surface; 16. a weight reduction groove; 17. a cam portion.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the sprocket-integrated camshaft comprises a camshaft-shaped body 1, wherein one end of the body 1 is provided with a ring-shaped part 11 with gradually increasing diameter, the thickness of the ring-shaped part 11 is uniform, and the ring-shaped part 11 is shaped like a bell mouth. The end of the annular part 11 is provided with a convex part 12 protruding outwards in the radial direction, the outer peripheral surface of the convex part 12 is provided with teeth 13 evenly distributed, and the body 1, the annular part 11 and the convex part 12 are integrally formed. This design reduces some structures that design in order to increase the joint strength of camshaft and sprocket through uniting two into one camshaft and sprocket integrated into one piece, thereby reduces the weight of camshaft and sprocket combination with the structure retrencied. Because the diameter of sprocket is far greater than the diameter of camshaft, so this design is at the annular part 11 of the tip design diameter grow gradually of body 1, slowly enlarge body 1's diameter through annular part 11, then replace the sprocket through bellied convex part 12 and the tooth 13 of design on convex part 12 outer peripheral face after enlarging to certain size, can play the same technological effect with the sprocket like this, body 1, annular part 11 and convex part 12 three integrated into one piece, on the basis of having guaranteed structural strength, whole camshaft's structure has been simplified, this sprocket integral type camshaft's quality has greatly reduced.

The junction of the outer side surface of the annular part 11 and the outer peripheral surface of the camshaft is provided with an inward concave cambered surface 14, and the junction of the outer side surface of the annular part 11 and the side surface of the convex part 12 is provided with an arc-shaped surface 15. The junction of the annular part 11 and the outer peripheral surface of the camshaft 1 adopts the shape of the concave cambered surface 14 to replace direct intersection, so that the stress generated at the butt joint position when the camshaft rotates can be well eliminated, and the camshaft has low quality and high structural strength. Articulated department on the surface of annular portion 11 and convex part 12 is arcwall face 15, designs its effect the same with interior concave surface 14 like this, and the stress between elimination annular portion 11 and the convex part 12 that also can be fine for structural strength is higher when this camshaft 1's quality is lower.

Weight reduction grooves 16 are formed on both sides of the convex portion 12. The convex part 12 is similar to a split chain wheel disc, the main function of the convex part 12 is to sleeve a chain, the force generated by the chain sleeved on the convex part is radial, and the two sides of the convex part are basically not acted by the force, so the weight reducing grooves 16 are designed on the two sides of the convex part on the basis of not influencing the structural strength of the convex part, and the quality of the camshaft can be effectively reduced. The outer peripheral surface of the cam shaft is provided with 2 cam parts 17, and the cam parts 17 are integrally formed with the body 1. The cam part 17 and the body 1 of the cam shaft are also integrally formed, and one cam shaft integrates three functions of a shaft, a cam and a chain wheel, so that the cam shaft has the advantages of simple structure, high strength, small mass and the like.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a sprocket integral type camshaft, includes body (1), its characterized in that, the one end of body (1) is equipped with orientation and deviates from body (1) one side diameter annular portion (11) that gradually enlarges, the tip of annular portion (11) is equipped with radial outside and is annular bellied convex part (12), has evenly distributed tooth (13) on the outer peripheral face of convex part (12), body (1), annular portion (11) and convex part (12) three integrated into one piece.

2. A sprocket integrated camshaft according to claim 1, wherein the outer surface of the ring portion (11) is provided with a concave arc surface (14) at the intersection with the outer circumferential surface of the body (1).

3. A sprocket integrated camshaft according to claim 2, wherein the outer side surface of the annular portion (11) and the side surface of the protruding portion (12) are connected by an arc surface (15).

4. A sprocket integrated camshaft according to claim 3, wherein weight-reducing grooves (16) are formed in both side portions of the projection (12).

5. A sprocket integrated camshaft according to any one of claims 1 to 4, wherein the body (1) is provided with at least one cam portion (17) on the outer circumferential surface thereof, and the cam portion (17) is integrally formed with the body (1).