CN101900168B

CN101900168B - Connecting shaft structure of cross shaft universal joint

Info

Publication number: CN101900168B
Application number: CN200910182157XA
Authority: CN
Inventors: 张世宏; 张嗣昌
Original assignee: KUNSHAN WEI CHUM PRECISION MACHINERY CO Ltd
Current assignee: KUNSHAN WEI CHUM PRECISION MACHINERY CO Ltd
Priority date: 2009-07-14
Filing date: 2009-07-14
Publication date: 2012-04-18
Anticipated expiration: 2029-07-14
Also published as: CN101900168A

Abstract

The invention discloses a connecting shaft structure of a cross shaft universal joint; the two sides of a connecting shaft are respectively provided with a connecting groove, a groove surface of which is provided with at least one convex rib; the two groove walls of the connecting grooves are concave inwards to form sinking parts, and the two groove walls of the connecting grooves are formed with bulges at openings; one end surface of a connecting end is provided with a groove corresponding to the convex rib which can be just blocked in the groove; the two outer side walls of the connecting end are provided with concave pits corresponding to the bulges which can be just blocked in the concave pits; the two outer side walls at one end of the connecting end are formed with shoulder parts; and gradual transition is formed between the outer side walls of the connecting end and the shoulder parts. When being implemented, the connecting shaft structure leads the shoulder parts to be contained in the sinking parts, the concave pits to be blocked on the bulges and the convex rib to be blocked in the groove for locating, thus leading the connecting end to be closely matched and fixed with the connecting shaft after assembly, reducing the using abrasion of a cross shaft, and prolonging the service life of the product; furthermore, the connecting shaft and the connecting end can be manufactured in an integral wire cutting way, so that the technique is simple, and the processing accuracy requirement of the product can be guaranteed.

Description

The coupling shaft structure of cross-axle universal shaft joint

Technical field

The present invention relates to the universal joint field, especially a kind of coupling shaft structure of cross-axle universal shaft joint.

Background technique

The cross coupling shaft structure of existing universal joint is mostly for offering through hole 11 at the middle part of coupling shaft 1; The connecting rod 3 that one end riveted is fixed with a connecting end 2 wore through hole 11 backs and fixed with another connecting end 2 riveteds; On coupling shaft 1 sidewall surfaces at through hole 11 two ends and the end face of two connecting ends 2, complement one another and be formed with position structure commonly used near coupling shaft 1; Above-mentioned existing cross coupling shaft structure is had relatively high expectations to the position and the aperture precision of through hole 11 on the one hand; Manufacture difficulty is big and product rejection rate is high, and manufacture cost is high, on the other hand in long-term using process; Only depend on position structure restriction connecting rod 3 relatively rotating in through hole 11 commonly used to make the position structure wearing and tearing easily, influence the working life of cross coupling shaft.

Summary of the invention

In order to overcome above-mentioned defective, the utility model provides a kind of coupling shaft structure of cross-axle universal shaft joint, can significantly improve the product operating life, and low preparation cost.

The present invention for the technological scheme that solves its technical problem and adopt is:

A kind of coupling shaft structure of cross-axle universal shaft joint is made up of coupling shaft and two connecting ends, and these coupling shaft both sides offer connecting groove respectively; The groove face of said connecting groove is provided with at least one fin, and inner concave shape is in depression on two cell walls of this connecting groove, on opening two cell walls of connecting groove, forms protruding simultaneously; Offer and said fin corresponding groove on said connecting end one end face; Said fin just can correspondence be fastened in the said groove, offers on two outer side walls of connecting end and the corresponding pit of said convexity, and said convexity just can be fastened in the said pit; Simultaneously on relative end two outer side walls of two connecting ends, form shoulder respectively; Be gradual transition between the outer side wall of said shoulder and said connecting end, during practical implementation, the shoulder of connecting end just can be placed in the sinking space of connecting groove; The pit of connecting end just can be equipped on the convexity of connecting groove; Two connecting end location cards are formed in two connecting grooves of coupling shaft, and the fin of connecting groove just can be fastened in the groove of connecting end and play positioning action again, thereby connecting end and coupling shaft after the assembling are tightly fixed; This structure that is tightly fixed has reduced the wearing and tearing of cross axle in long-term using process, has significantly improved the operating life of cross axle; Coupling shaft and connecting end can be the one line and cut making again, can guarantee relatively to reach required precision and reduce product rejection rate, and processing technology is simple and fabricating cost is comparatively cheap.

As further improvement of the present invention, middle part and relative coupling shaft shaft axis that the connecting groove of coupling shaft both sides is located at said coupling shaft are symmetry.

As further improvement of the present invention; Fin is symmetrical in the center line of groove face; This center line is vertical with the coupling shaft shaft axis, establishes two above fins for being symmetrically distributed in said center line both sides, establish a fin then fin just coincide with said center line; Certainly fin can be symmetrical in the geometrical center of this groove face, is similarly this routine protection domain.

As further improvement of the present invention, the fin on the groove face of said connecting groove aligns perpendicular to the bi-side of connecting end with groove face, and this fin is located on the center line of this groove face, and said center line is vertical with the coupling shaft shaft axis.

As further improvement of the present invention, said fin is the straight line type fin, and said groove is the straight line type groove.

As further improvement of the present invention, said depression is the straight line type depression, and said pit is the straight line type pit.

As further improvement of the present invention, the bottom pitted surface that said pit is connected with said shoulder offers the circular arc recess, destroys the drive fit of connecting end and coupling shaft to prevent using process protrusions friction pit.

The invention has the beneficial effects as follows: the shoulder of connecting end just can be placed in the sinking space of connecting groove; The pit of connecting end just can be equipped on the convexity of connecting groove; Two connecting end location cards are formed in two connecting grooves of coupling shaft; The fin of connecting groove just can be fastened in the groove of connecting end and play positioning action again; Thereby connecting end and coupling shaft after the assembling are tightly fixed, and this structure that is tightly fixed has reduced the wearing and tearing of cross axle in long-term using process, has significantly improved the operating life of cross axle; Coupling shaft and connecting end can be the one line and cut making again, can guarantee relatively to reach required precision and reduce product rejection rate, and processing technology is simple and fabricating cost is comparatively cheap.

Description of drawings

Fig. 1 is a kind of structural representation of the present invention;

Fig. 2 is the STRUCTURE DECOMPOSITION schematic representation of Fig. 1;

Fig. 3 is an another kind of structural representation of the present invention;

Fig. 4 is the STRUCTURE DECOMPOSITION schematic representation of Fig. 3;

Fig. 5 is the prior art constructions decomposing schematic representation that the utility model contrasted;

Fig. 6 is the assembly structure schematic representation of Fig. 5.

Embodiment

Embodiment: a kind of coupling shaft structure of cross-axle universal shaft joint, to form by coupling shaft 1 and two connecting ends 2, these coupling shaft 1 both sides offer connecting groove 10 respectively; The groove face of said connecting groove 10 is provided with at least one fin 101; Inner concave shape is in depression 102 on two cell walls of this connecting groove 10, on opening two cell walls of connecting groove 10, forms convexity 103 simultaneously, offers on said connecting end 2 one end faces and said fin 101 corresponding groove 21; Said fin 101 just can correspondence be fastened in the said groove 21; Offer the pit 22 corresponding with said protruding 103 on two outer side walls of connecting end 2, said protruding 103 just can be fastened in the said pit 22, simultaneously on relative end two outer side walls of two connecting ends 2, form shoulder 23 respectively; Be gradual transition between the outer side wall of said shoulder 23 and said connecting end 2, during practical implementation, the shoulder 23 of connecting end 2 just can be placed in depression 102 spaces of connecting groove 10; The pit 22 of connecting end 2 just can be equipped on the convexity 103 of connecting groove 10; Two connecting ends, 2 location cards are formed in two connecting grooves 10 of coupling shaft 1, and the fin 101 of connecting groove 10 just can be fastened in the groove 21 of connecting end 2 and play positioning action again, thereby the connecting end 2 after the assembling is tightly fixed with coupling shaft 1; This structure that is tightly fixed has reduced the wearing and tearing of cross axle in long-term using process, has significantly improved the operating life of cross axle; Coupling shaft 1 can be the one line with connecting end 2 and cuts making again, can guarantee relatively to reach required precision and reduces product rejection rate, and processing technology is simple and fabricating cost is comparatively cheap.

Middle part and relative coupling shaft shaft axis that the connecting groove 10 of coupling shaft 1 both sides is located at said coupling shaft 1 are symmetry.

Fin 101 is symmetrical in the center line of groove face; This center line is vertical with the coupling shaft shaft axis; If two above fins 101 are for being symmetrically distributed in said center line both sides; If 101 fins 101 of a fin just coincide with said center line, fin 101 can be symmetrical in the geometrical center of this groove face certainly, is similarly this routine protection domain.

Fin 101 on the groove face of said connecting groove aligns perpendicular to the bi-side of connecting end with groove face, and this fin is located on the center line of this groove face, and said center line is vertical with the coupling shaft shaft axis.

Said fin 101 is the straight line type fin, and said groove 21 is the straight line type groove.

Said depression 102 is the straight line type depression, and said pit 22 is the straight line type pit.

Said pit 22 offers circular arc recess 220 with the bottom pitted surface that said shoulder 23 is connected, and destroys the drive fit of connecting end 2 and coupling shaft 1 to prevent using process protrusions 103 friction pits 22.

Claims

1. the coupling shaft structure of a cross-axle universal shaft joint; It is characterized in that: form by coupling shaft (1) and two connecting ends (2); These coupling shaft both sides offer connecting groove (10) respectively; The groove face of said connecting groove is provided with at least one fin (101), and inner concave shape is in depression (102) on two cell walls of this connecting groove, on opening two cell walls of connecting groove, forms simultaneously protruding (103); Offer and said fin (101) corresponding groove (21) on said connecting end one end face; Said fin (101) just can correspondence be fastened in the said groove (21), offers the pit (22) corresponding with said convexity (103) on two outer side walls of connecting end, and said convexity (103) just can be fastened in the said pit (22); Simultaneously on relative end two outer side walls of two connecting ends, form shoulder (23) respectively, be gradual transition between the outer side wall of said shoulder (23) and said connecting end.

2. the coupling shaft structure of cross-axle universal shaft joint according to claim 1 is characterized in that: middle part and relative coupling shaft shaft axis that the connecting groove of coupling shaft both sides (10) is located at said coupling shaft are symmetry.

3. the coupling shaft structure of cross-axle universal shaft joint according to claim 1 is characterized in that: fin (101) is symmetrical in the center line of groove face, and this center line is vertical with the coupling shaft shaft axis.

4. the coupling shaft structure of cross-axle universal shaft joint according to claim 3; It is characterized in that: the fin on the groove face of said connecting groove (101) aligns perpendicular to the bi-side of connecting end with groove face; This fin is located on the center line of this groove face, and said center line is vertical with the coupling shaft shaft axis.

5. according to the coupling shaft structure of claim 1 or 3 described cross-axle universal shaft joints, it is characterized in that: said fin is the straight line type fin, and said groove is the straight line type groove.

6. the coupling shaft structure of cross-axle universal shaft joint according to claim 1 is characterized in that: said depression is the straight line type depression, and said pit is the straight line type pit.

7. according to the coupling shaft structure of claim 1 or 6 described cross-axle universal shaft joints, it is characterized in that: the bottom pitted surface that said pit (22) is connected with said shoulder (23) offers circular arc recess (220).