CN202659749U - Eccentric crossing slot cage type constant-velocity universal joint - Google Patents

Abstract

The utility model relates to an eccentric crossing slot cage type constant-velocity universal joint which comprises a transmission shaft, a bell-shaped shell, a plurality of steel balls, an eccentric retainer, a star-shaped sleeve and a steel wire baffle ring, wherein the steel balls are equidistantly arrayed in the eccentric retainer in the form of three big steel balls crossing with three small steel balls in turn; six channel sections of the bell-shaped shell and the star-shaped sleeve corresponding to the steel balls are crossed and equidistantly arrayed in turn; eccentric distances in same size along opposite directions are arranged between the centers of the channels and the centers of the window holes of the eccentric retainer; and the eccentric distances in same size along opposite directions are arranged between the inner and outer spherical surfaces of the eccentric retainer and the centers of the window holes of the eccentric retainer. The eccentric crossing slot cage type constant-velocity universal joint has the advantages: the channel eccentricity with a traditional structure is changed into spherical surface concentricity; the concentric retainer with the traditional structure is changed into the retainer with inner and outer spherical eccentricity; three small balls are used for adjusting the angle; three big balls are used for transferring force; the motion and torque can be stably, flexibly, reliably and accurately transferred; the structure is compact; the friction coefficient is low; and the bearing capacity is strong.

Description

Eccentric crossed grooves rzeppa universal joint

Technical field:

The utility model relates to a kind of coupling, especially relates to a kind of eccentric crossed grooves rzeppa universal joint.

Background technique:

The rzeppa universal joint of conventional construction is inner ball surface and the retainer outer spherical surface of outer race, the outer spherical surface of star sleeve and the inner ball surface of retainer be totally 4 concentric sphericals, this center overlaps with the diaxon intersection point, outer race and star sleeve all circumferential six equally have in six on sphere separately, outer channel, and raceway groove center and its sphere centre all have an equal and opposite in direction separately, the throw of eccentric of opposite direction, and six steel ball sizes all equate, although geometrical principle is correct, but through for many years use result as can be known, above-mentioned conventional construction has following deficiency: 1) because the off-centre of outer race and star sleeve raceway groove and its sphere, cause raceway groove end walls thickness ununiformity, so that the wall thickness thin location very easily produces and weares and teares first and lost efficacy; 2) because wall unevenness very easily produces heat-treated sturcture inequality, distortion and defects i.e.cracks; 3) because six steel ball in the same sizes are had relatively high expectations to its size and dimension positional error, also brought difficulty for machining and quality control; 4) owing to throw of eccentric and space layout reason, be difficult to arrange, so that the intensity of retainer can not be guaranteed, be easy to damage first, and bearing capacity be low; If the amplification physical dimension causes weight to increase, bulky, cost improves.

The model utility content:

The purpose of this utility model is that a kind of rational in infrastructure, easy to make, eccentric crossed grooves rzeppa universal joint that bearing capacity is high is provided for the prior art deficiency.

The purpose of this utility model is to realize by following measures: a kind of eccentric crossed grooves rzeppa universal joint, and it comprises transmission shaft, outer race, some steel balls, nonconcentric cage, star sleeve, Steel Cable Baffle Ring; It is characterized in that, described steel ball has three big steel balls, three small balls, three big steel balls, three small balls intersect successively five equilibrium and are arranged in the nonconcentric cage, minute arrangements such as six raceway groove cross sections with the steel ball reply of bell cover and star sleeve also intersect successively, and raceway groove is concentric with sphere, raceway groove element line is linarity to opposite direction at the maximum point place separately all, all the other sections are circular arc, described raceway groove center and nonconcentric cage fenestra center are provided with equal and opposite in direction, the throw of eccentric of opposite direction, in the nonconcentric cage, there is an equal and opposite in direction at the outer spherical surface center apart from its fenestra center respectively, the throw of eccentric of opposite direction, described six steel balls are positioned at six raceway grooves of outer race and star sleeve, by nonconcentric cage guiding corner, star sleeve is installed on the transmission shaft by spline, and by the circlip axially locating.

Compared with prior art, adopted the eccentric crossed grooves rzeppa universal joint that the utility model proposes, have following advantage: 1) the raceway groove off-centre with conventional construction changes into sphere concentric, in the concentric retainer of conventional construction changed into, the retainer of outer spherical surface off-centre, change the steel ball of six same structures of conventional geometric and raceway groove into staggered form three large, three small balls, adjust angle with three beads, main by three large ball power transmissions, can not only be steady, flexibly, reliably and accurately transmit motion and torque, and compact structure, rationally, friction factor is low, transmission efficiency is high, and bearing capacity is strong; 2) because retainer is eccentric, outer race and star sleeve raceway groove element wire shaped are that straight line and circular arc are combined, are conducive to direct precision forging moulding, are convenient to processing and detection, have reduced cost of production, improve work efficiency.

Description of drawings:

Fig. 1 is that an embodiment who the utility model proposes is vertically just cuing open structural representation.

Fig. 2 is Fig. 1 embodiment horizontal section schematic diagram.

Embodiment:

Below in conjunction with accompanying drawing embodiment is elaborated: in Fig. 1～enforcement illustration of the present utility model shown in Figure 2, a kind of eccentric crossed grooves rzeppa universal joint, it comprises: transmission shaft 1, outer race 2, big steel ball 3, small ball 4, nonconcentric cage 5, star sleeve 6, Steel Cable Baffle Ring 7.Described big steel ball has three, small ball to have three, three big steel balls, three small balls intersect successively five equilibrium and are arranged in the nonconcentric cage, minute arrangements such as six raceway groove cross sections with the steel ball reply of bell cover and star sleeve also intersect successively, and raceway groove is concentric with sphere, the plain line of raceway groove is linarity to opposite direction at the maximum point place separately all, and all the other sections are circular arc.Because the raceway groove center overlaps with sphere centre, nonconcentric cage is shaftless to load, is beneficial to transfer of torque.Described raceway groove center and nonconcentric cage 5 fenestra centers are provided with the throw of eccentric of equal and opposite in direction, opposite direction, and there is an equal and opposite in direction at the internal and external spherical surfaces center of nonconcentric cage 5 apart from its fenestra center respectively, and the throw of eccentric of opposite direction realizes constant-speed transmission.Wait a minute arrangement because six fenestras of steel ball also intersect successively, six steel balls are positioned at six raceway grooves of outer race and star sleeve, adjust angle, three big steel ball power transmissions with three small balls.The outer race inner ball surface contacts with the nonconcentric cage outer spherical surface, the star sleeve outer spherical surface contacts with the retainer inner ball surface, and steel ball contacts with outer race raceway groove, star sleeve raceway groove simultaneously, by nonconcentric cage guiding corner, star sleeve is installed on the transmission shaft by spline, and by circlip 7 axially locating.

The above has described mode of execution of the present utility model by reference to the accompanying drawings; the structure that embodiment provides does not consist of restriction of the present utility model, and those skilled in the art make within the scope of the appended claims various distortion or revise all in protection domain in related domain.

Claims (1)

1. eccentric crossed grooves rzeppa universal joint, it comprises transmission shaft, outer race, some steel balls, nonconcentric cage, star sleeve, Steel Cable Baffle Ring; It is characterized in that, described steel ball has three big steel balls, three small balls, three big steel balls, three small balls intersect successively five equilibrium and are arranged in the nonconcentric cage, minute arrangements such as six raceway groove cross sections with the steel ball reply of bell cover and star sleeve also intersect successively, and raceway groove is concentric with sphere, raceway groove element line is linarity to opposite direction at the maximum point place separately all, all the other sections are circular arc, described raceway groove center and nonconcentric cage fenestra center are provided with equal and opposite in direction, the throw of eccentric of opposite direction, in the nonconcentric cage, there is an equal and opposite in direction at the outer spherical surface center apart from its fenestra center respectively, the throw of eccentric of opposite direction, described six steel balls are positioned at six raceway grooves of outer race and star sleeve, by nonconcentric cage guiding corner, star sleeve is installed on the transmission shaft by spline, and by the circlip axially locating.

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