CN201144973Y

CN201144973Y - Axially-movable three-ball pin type constant velocity universal joint with special structure

Info

Publication number: CN201144973Y
Application number: CNU200720114434XU
Authority: CN
Inventors: 陆建春; 沈海
Original assignee: Wanxiang Qianchao Co Ltd; Wanxiang Group Corp
Current assignee: Wanxiang Qianchao Co Ltd; Wanxiang Group Corp
Priority date: 2007-09-25
Filing date: 2007-09-25
Publication date: 2008-11-05
Anticipated expiration: 2017-09-25

Abstract

The utility model relates to a three sphere-pin constant velocity universal joint capable of performing axial movement with a special structure, comprising an external part 1, an internal part 2 and a movable part 10, wherein, one or over one guide grooves 11 which can be extended along the axial direction and separated with each other at intervals are arranged on the internal circumferential surface of the external part 1; the journal surface of the internal part 2 is spherial; the movable part 10 comprises an inner ring 5; and an outer ring 3 which is matched with the inner ring 5 is arranged on the outer end of the inner ring 5. Due to adoption of the technical proposal, the outer ring 3 which is matched with the inner ring 5 is arranged on the outer end of the inner ring 5 and a journal of the internal part 2 is designed into the shape of the sphere, thereby the three sphere-pin constant velocity universal joint capable of performing axial movement with the special structure can reduce the axial force caused by mutual extrusion of the guide grooves 11 and the inner ring 5, simultaneously reduce the abrasion of the inner ring 5 and increase the service life of the universal joint.

Description

A kind of moved axially tripod constant-velocity universal joint of special construction

Technical field

The utility model relates to a kind of automobile with reversing transfer unit, is specifically related to a kind of universal joint.

Background technique

When being used for the automobile power transmission, constant velocity universal joint the rotating drive power or the moment of driving shaft are passed to each by a driven axle, in the existing universal joint, when the circular arc slider tilts at a certain angle with respect to guiding groove, the circular arc slider slides on this guiding groove internal surface, keep this some contact simultaneously, the circular arc slider is gone up on one point with this guiding groove holding point on one side and is contacted, on one side along axially or with axially vertical direction sliding.The point that circular arc slider and guiding groove remain on any contact and driving force when driving shaft is passed to driven axle, driving force concentrates on this point of contact between circular arc slider and the guiding groove, be added on this guiding groove inner peripheral surface and to constitute the pressure that point contacts excessive with the circular arc slider, caused the quickening of circular arc slider wearing and tearing, parts such as circular arc slider have been destroyed, the working life of having reduced universal joint.

Summary of the invention

The purpose of this utility model is to provide a kind of moved axially tripod constant-velocity universal joint of special construction, problem of stress concentration when using the moved axially tripod constant-velocity universal joint of this special construction can solve guiding groove to contact with the circular arc slider, stress is evenly scatter, reduce axial force, thereby prevent the brute force wearing and tearing of universal joint parts such as circular arc slip and guiding groove when work, the working life of improving universal joint.

For achieving the above object, the technical solution adopted in the utility model is: a kind of moved axially tripod constant-velocity universal joint of special construction, it has an outer structure part, an interior structure part and a movable part, outer structure part circumferential surface within it is provided with the guiding groove that one or more can stretch vertically and be separated by with a determining deviation, the internal spline of interior structure part is used for transmission shaft and connects, and movable part is made up of needle roller, inner ring, needle roller back-up ring, and described movable part also comprises the outer ring.

As a kind of preferred, the internal surface of described inner ring is a periphery, it and interior structure part axle journal adapt, outer surface is the cylndrical surface, and the internal surface of outer ring is a periphery, and inner ring outer surface, inner surface and needle roller surface adapt, the outer surface of outer ring is an arc shaped surface, it adapts with the guiding groove of outer structure part, and the internal surface of the outer surface of inner ring, needle roller and outer ring is formed needle bearing, guarantees to rotate flexibility; The inner surface configuration of the outer surface of outer ring and outer structure part is a periphery, for the line contact, can realize axial displacement; The journal surface of interior structure part is that sphere contacts with the cylndrical surface with the internal surface of inner ring, can realize rotating and swing.

As a kind of improvement, the journal surface of described interior structure part is a spherical shape.

As a kind of preferred, the opened gap after the described needle roller back-up ring assembling is less than the diameter of needle roller.

The utility model is owing to adopt technique scheme, an outer ring that is complementary with it is set in the inner ring outer end, and the axle journal of interior structure part is designed to sphere, so just can reduce the axial force that produces because of guiding groove and inner ring mutual extrusion, also reduce simultaneously the wearing and tearing of inner ring, increased the working life of universal joint.

Description of drawings

Fig. 1 is an axial section schematic representation of the present utility model.

Fig. 2 is a right elevation of the present utility model.

Embodiment

As shown in Figure 1, 2 for a kind of moved axially tripod constant-velocity universal joint of special construction, it has an outer structure part 1, an interior structure part 2 and a movable part 10, outer structure part 1 circumferential surface within it is provided with the guiding groove 11 that several can stretch vertically and be separated by with a determining deviation, the internal spline of interior structure part 2 is used for transmission shaft and connects, the journal surface of interior structure part 2 is a spherical shape, movable part 10 is made up of needle roller 4, inner ring 5, needle roller back-up ring 6, and described movable part 10 also comprises outer ring 3.The internal surface of described inner ring 5 is a periphery, and outer surface is the cylndrical surface, and the internal surface of outer ring 3 is a periphery, and the internal surface of the internal surface of inner ring 5 and outer ring 3 and needle roller 4 surfaces adapt.The outer surface of outer ring 3 is an arc shaped surface, and it adapts with the guiding groove 11 of outer structure part 1, and the internal surface of the outer surface of inner ring 5, needle roller 4 and outer ring 3 is formed needle bearing, guarantees to rotate flexibility; The inner surface configuration of the outer surface of outer ring 3 and outer structure part 1 is a periphery, for the line contact, can realize axial displacement; The internal surface of the journal surface of interior structure part and inner ring 5 is that sphere contacts with the cylndrical surface, can realize rotating and swing, and the opened gap after 6 assemblings of needle roller back-up ring is less than the diameter of needle roller 4.The utility model is owing to adopt technique scheme, in inner ring 5 outer ends an outer ring that is complementary with it 3 is set, and the axle journal of interior structure part 2 is designed to sphere, so just can reduce the axial force that produces because of guiding groove 11 and inner ring 5 mutual extrusion, also reduce simultaneously the wearing and tearing of inner ring 5, increased the working life of universal joint.

Claims

1. the moved axially tripod constant-velocity universal joint of a special construction, it has an outer structure part (1), an interior structure part (2) and a movable part (10), outer structure part (1) circumferential surface within it is provided with the guiding groove (11) that one or more can stretch vertically and be separated by with a determining deviation, the internal spline of interior structure part (2) is used for transmission shaft and connects, movable part (10) is made up of needle roller (4), inner ring (5), needle roller back-up ring (6), it is characterized in that: described movable part (10) also comprises outer ring (3).

2. the moved axially tripod constant-velocity of special construction according to claim 1 universal joint, it is characterized in that: the internal surface of described inner ring (5) is a periphery, it and interior structure part (2) axle journal adapt, outer surface is the cylndrical surface, the internal surface of outer ring (3) is a periphery, inner ring (5) outer surface, outer ring (3) internal surface and needle roller (4) surface adapt, and the outer surface of outer ring (3) is an arc shaped surface, and it adapts with the guiding groove (11) of outer structure part (1).

3. the moved axially tripod constant-velocity of special construction according to claim 1 and 2 universal joint is characterized in that: the journal surface of structure part (2) is a spherical shape in described.

4. the moved axially tripod constant-velocity of special construction according to claim 1 and 2 universal joint is characterized in that: the opened gap after described needle roller back-up ring (6) assembling is less than the diameter of needle roller.