CN201991957U

CN201991957U - Universal joint crossing shaft

Info

Publication number: CN201991957U
Application number: CN2011201511720U
Authority: CN
Inventors: 金佩瑾
Original assignee: Ningbo Jiabijia Industry & Trade Co Ltd
Current assignee: Ningbo Jiabijia Industry & Trade Co Ltd
Priority date: 2011-05-10
Filing date: 2011-05-10
Publication date: 2011-09-28
Anticipated expiration: 2021-05-10

Abstract

The utility model relates to a universal joint crossing shaft which comprises a center green body and four axle heads located outside the center green body, wherein the axle heads and the center green body are connected into a whole, and a cone surface is arranged at the root part. The universal joint crossing shaft is characterized in that the center green body is in a sphere shape, and the two adjacent axle heads are connected through outer convex arc surfaces. Products are in one-step forming through cold extrusion, which has the advantages of high production speed. The center green body is designed into the sphere shape, the two adjacent axle heads are connected through the larger outer convex arc surface, meanwhile, two end faces are designed into circular planes, the structural design not only accords with the metal fluidity but also saves materials, and meanwhile, machinery performance can also be met. As the two end faces are the circular planes, only one hole is sheared on a die, the design and the manufacture of the die are greatly facilitated, and even if the die is worn out, the universal joint crossing shaft can be used after a slightly larger matched punch is replaced. The universal joint crossing shaft has the advantages that the structure is simple and beautiful, the materials are saved, the die is convenient to design and process, and the production speed is high.

Description

A kind of universal-joint cross trunnion

Technical field

The utility model relates to a kind of cross axle, is specifically related to a kind of universal-joint cross trunnion that utilizes the cold hobbing mode to process.

Background technique

Existing universal-joint cross trunnion is generally made by forge hot, but big, the follow-up amount of machining of this process energy consumption is big, stock utilization is low, cost of production is high and production environment and noise do not meet environmental requirement.The cold hobbing of employing mode production and processing universal-joint cross trunnion is also arranged at present, as the patent No. is the Chinese patent " a kind of cold hobbing universal-joint cross trunnion " of CN200820163464.4, base substrate and four spindle noses that are positioned at the external side of intermediate blank in the middle of comprising, spindle nose and middle base substrate are connected as a single entity, it is characterized in that, root between two adjacent spindle noses is provided with the right angle shoulder, and described middle base substrate becomes rectangle.Though this universal-joint cross trunnion increases on stock utilization and manufacturing efficiency, its shape is complicated, the Mould Machining inconvenience, required precision is tight, and irregular because of its blank shape simultaneously, metal flow is poor, and can produce burr after the die wear, difficulty is removed.

Summary of the invention

Technical problem to be solved in the utility model is the universal-joint cross trunnion that a kind of cold hobbing processing is provided at the above-mentioned state of the art, and it has, and construction profile is simple, material is economized, the fast advantage of speed of production.

The utility model solves the problems of the technologies described above the technological scheme that is adopted: a kind of universal-joint cross trunnion, base substrate and four spindle noses that are positioned at the external side of intermediate blank in the middle of comprising, spindle nose and middle base substrate are connected as a single entity, its root is the frustum face, it is characterized in that described middle base substrate is sphere-like, is that outer convex arc surface connects between two adjacent spindle noses.

As improvement, both sides, the front and back end face of described middle base substrate is shaped to circular plane, is provided with the pit that concaves in the central position of both sides, front and back end face.

As improvement, described pit is two, is symmetricly set on the both sides, front and back of described middle base substrate.

Improve, the bottom of described pit is the plane again, between the end face of the bottom surface of pit and described centre base substrate successively through inclined-plane, first cambered surface, the second cambered surface transition.So more help the demoulding in the course of working, make that processing is more convenient.

At last, the exterior edge face of described spindle nose is shaped to shallow hemisphere face.

Compared with prior art, advantage of the present utility model is: product is by the cold hobbing single forming, and it has the fast advantage of speed of production; Be designed to middle base substrate spherical, be that bigger outer convex arc surface connects between two adjacent spindle noses, both ends of the surface are designed to circular flat simultaneously, this structural design had both met the flowability of metal, can save material again, simultaneously also can satisfy its mechanical property, because its both ends of the surface are circular flat, it is just passable only to need to cut out on mould a hole, greatly facilitate Mould design and manufacturing, even die wear occurs, it is just passable also only to need to change a little bigger supporting drift of an end, the utility model not only has simple and beautiful structure, the advantage that material is economized, and mold design is easy to process, speed of production is fast.

Description of drawings

Fig. 1 is a perspective view of the present utility model;

Fig. 2 is a plan view of the present utility model;

Fig. 3 is the sectional view of Fig. 2 along the AA line;

Fig. 4 is the sectional view of middle base substrate of the present utility model.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Anticipate as shown in the figure, a kind of universal-joint cross trunnion, adopt the machine shaping of cold hobbing processing mode, base substrate 1 and four spindle noses 2 that are positioned at middle base substrate 1 outside in the middle of structure comprises, four spindle noses 2 are arranged in cross, on it bearing can be installed, described spindle nose 2 is connected as a single entity with middle base substrate 1, its root is the frustum face, base substrate 1 is sphere-like in the middle of described, be that bigger outer convex arc surface connects between two adjacent spindle noses 2, the exterior edge face of described spindle nose 2 is shaped to shallow hemisphere face 4, and spindle nose 2 ends scratch the needle roller in the bearing in the time of can avoiding bearing is installed like this; Both sides, the front and back end face of base substrate 1 is shaped to circular plane in the middle of simultaneously described, and it is just passable so only need to cut out a hole on mould, greatly facilitates Mould design and manufacturing; Central position at both sides, middle base substrate 1 front and back end face is provided with the pit 3 that concaves, described pit 3 is two, be symmetricly set on the both sides, front and back of described middle base substrate 1, the bottom of described pit 3 is the plane, the bottom surface of pit 3 and described in the middle of between the end face of base substrate 1 successively through inclined-plane 5, first cambered

surface

6,7 transition of second cambered surface, wherein inclined-plane 5 is more shallow, first cambered surface 6 is darker, second cambered surface 7 is placed in the middle, such structure more helps the demoulding in the course of working, feasible processing is more convenient, has also saved material simultaneously.

During use,, on four spindle noses 2 of cross axle, load onto bearing again, used in the Motor Vehicle of just universal joint assembly that assembles can being packed into loading onto oil sealing between the root of cross axle and the bearing.

Claims

1. universal-joint cross trunnion, base substrate and four spindle noses that are positioned at the external side of intermediate blank in the middle of comprising, spindle nose and middle base substrate are connected as a single entity, and its root is the frustum face, it is characterized in that described middle base substrate is sphere-like, is that outer convex arc surface connects between two adjacent spindle noses.

2. universal-joint cross trunnion according to claim 1 is characterized in that both sides, the front and back end face of described middle base substrate is shaped to circular plane, is provided with the pit that concaves in the central position of both sides, front and back end face.

3. universal-joint cross trunnion according to claim 2 is characterized in that described pit is two, is symmetricly set on the both sides, front and back of described middle base substrate.

4. according to claim 2 or 3 described universal-joint cross trunnions, the bottom that it is characterized in that described pit is the plane, the bottom surface of pit and described in the middle of between the end face of base substrate successively through inclined-plane, first cambered surface, the second cambered surface transition.

5. according to claim 1 or 2 or 3 described universal-joint cross trunnions, it is characterized in that the exterior edge face of described spindle nose is shaped to shallow hemisphere face.