CN201144972Y

CN201144972Y - Axially-movable three-ball pin type constant velocity universal joint

Info

Publication number: CN201144972Y
Application number: CNU2007201144316U
Authority: CN
Inventors: 陆建春; 郑德信
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, comprising an external part 1 and an internal part 10, wherein, a plurality of guide grooves 11 which are extended along the axial direction and separated with each other at intervals are arranged on the internal circumferential surface of the external part 1. Moreover, the three sphere-pin constant velocity universal joint capable of performing axial movement comprises a circular sliding part 4 and a sliding part 6 which is matched with the outer end of the circular sliding part 4 and the lateral surface of which is a plane. The sliding part which is matched with the circular sliding part and the lateral surface of which is the plane is arranged on the outer end of the circular sliding part and the sliding parts always linearly contact the guide grooves of the external part without formation of angles, thereby the three sphere-pin constant velocity universal joint capable of performing axial movement can obviously reduce the axial force, the noise, the vibration and the unevenness, reduce the axial force caused by mutual extrusion of the guide grooves and the circular sliding part, simultaneously reduce the abrasion of the circular sliding part and increase the service life of the universal joint.

Description

A kind of tripod constant-velocity universal joint that moves axially

Technical field

The utility model relates to a kind of automobile with reversing transfer unit, is specifically related to a kind of three ball pin style 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 tripod constant-velocity universal joint that moves axially, use this problem of stress concentration when moving axially the tripod constant-velocity universal joint and can solve guiding groove and 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 slider and guiding groove when work, the working life of improving universal joint.

To achieve these goals, the technical solution adopted in the utility model is: a kind of tripod constant-velocity universal joint that moves axially, it has an outer structure part and interior structure parts, outer structure part circumferential surface within it is provided with several and stretches vertically and with determining deviation guiding groove separately, interior structure parts insert the inner space of opening wide of described outer structure part and are connected in a transmission shaft, the described tripod constant-velocity universal joint that moves axially comprises: spider, needle roller, the outside is provided with the paired circular arc slider that can move along guiding groove on the needle roller, the slider that adapts with circular arc slider the inner that is arranged on circular arc slider outer end.

As a kind of preferred, the outer side surface of described slider is an outer round surface, outer round surface contacts for straight line with the guiding groove surface, can realize moving axially, like this because slider always linearly contacts with the guiding groove of outer structure part, can angulation, so can obviously reduce axial force, significantly reduce noise, vibration and uneven compliance.

As a kind of preferred, the inner side surface arc-shaped concave of described slider and the arc convex of described circular arc slider match, and so just can realize rotation, the swing of slider.

As a kind of preferred, needle roller and circular arc slider upper-end surface are provided with a needle roller back-up ring, are provided with a Steel Cable Baffle Ring above the needle roller back-up ring.

The utility model is owing to adopt technique scheme, the slider that in circular arc slider outer end an outer side surface that is complementary with it to be set be the plane, so just can reduce the axial force that produces because of guiding groove and circular arc slider mutual extrusion, also reduce simultaneously the wearing and tearing of circular arc slider, 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 Fig. 1,2 are depicted as a kind of tripod constant-velocity universal joint that moves axially, it has an outer structure part 1 and interior structure parts 10, outer structure part 1 circumferential surface within it is provided with several and stretches vertically and with determining deviation guiding groove 11 separately, interior structure parts 10 insert the inner space of opening wide of described outer structure part 1 and are connected in a transmission shaft, the described tripod constant-velocity universal joint that moves axially comprises: spider 2, needle roller 3, the outside is provided with the paired circular arc slider 4 that can move along guiding groove 11 on the needle roller 3, also comprise the slider 6 that adapts with circular arc slider 4 the inners that is arranged on circular arc slider 4 outer ends, the outer side surface 62 of slider 6 is an outer round surface, outer round surface contacts for straight line with guiding groove 11 surfaces, can realize moving axially, inner side surface 61 arc-shaped concaves of described slider 6 and the arc convex of described circular arc slider 4 match, and so just can realize the rotation of slider, swing.Described needle roller 3 and circular arc slider 4 upper-end surfaces are provided with a needle roller back-up ring 8, are provided with a Steel Cable Baffle Ring 7 above the needle roller back-up ring 8.The utility model is owing to adopt technique scheme, the slider that in circular arc slider outer end an outer side surface that is complementary with it to be set be the plane, like this because slider always linearly contacts with the guiding groove of outer structure part, can angulation, so can obviously reduce axial force, significantly reduce noise, vibration and uneven compliance; Can reduce the axial force that produces because of guiding groove and circular arc slider mutual extrusion, also reduce the wearing and tearing of circular arc slider simultaneously, increase the working life of universal joint.

Claims

1. one kind can move axially the tripod constant-velocity universal joint, it has an outer structure part (1) and interior structure parts (10), outer structure part (1) circumferential surface within it is provided with one or more and stretches vertically and with determining deviation guiding groove (11) separately, interior structure parts (10) insert the inner space of opening wide of described outer structure part (1) and are connected in a transmission shaft, the described tripod constant-velocity universal joint that moves axially comprises: spider (2), needle roller (3), needle roller (3) is gone up the outside and is provided with the paired circular arc slider (4) that can move along guiding groove (11), it is characterized in that: also comprise the slider (6) that adapts with circular arc slider (4) the inner that is arranged on circular arc slider (4) outer end.

2. a kind of tripod constant-velocity universal joint that moves axially according to claim 1 is characterized in that: the outer side surface (62) of described slider (6) is an outer round surface, and outer round surface contacts for straight line with guiding groove (11) surface.

3. a kind of tripod constant-velocity universal joint that moves axially according to claim 1 is characterized in that: inner side surface (61) arc-shaped concave of described slider (6) and the arc convex of described circular arc slider (4) match.

4. according to claim 2 or 3 described a kind of tripod constant-velocity universal joints that move axially, it is characterized in that: described needle roller (3) and circular arc slider (4) upper-end surface are provided with a needle roller back-up ring (8), are provided with a Steel Cable Baffle Ring (7) above the needle roller back-up ring (8).