CN202468729U

CN202468729U - Connecting structure of long shaft and bearing

Info

Publication number: CN202468729U
Application number: CN201220117490XU
Authority: CN
Inventors: 张立新; 王全宾; 郝忠献; 沈泽俊
Original assignee: China Petroleum and Natural Gas Co Ltd
Current assignee: China Petroleum and Natural Gas Co Ltd
Priority date: 2012-03-26
Filing date: 2012-03-26
Publication date: 2012-10-03
Anticipated expiration: 2022-03-26

Abstract

The utility model provides a connecting structure of a long shaft and a bearing. The connecting structure comprises the long shaft, the bearing and a tolerance ring. A plurality of protruding strips are peripherally disposed on the outer surface of the tolerance ring at intervals. Each protruding strip extends along the axial direction of the tolerance ring. Annular protrusions are formed at two side edges of the inner surface of the tolerance ring. An annular groove is reserved on the long shaft. The tolerance ring is embedded into the annular groove correspondingly. The bearing is sleeved onto the tolerance ring correspondingly. The annular protrusions of the tolerance ring are contacted with the surface of the annular groove. Each protruding strip on the outer surface of the tolerance ring is supported onto the inner peripheral face of the bearing correspondingly. The bearing is in interference fit with the long shaft through the tolerance ring. By the connecting structure of the long shaft and the bearing, assembling difficulty of the long shaft and the bearing can be lowered, interchangeability of parts is increased, and defects in the prior art are overcome.

Description

The linkage structure of a kind of major axis and bearing

Technical field

The utility model relates to a kind of linkage structure, particularly, is the linkage structure of a kind of major axis and bearing.

Background technique

When major axis was connected with a plurality of bearings, because be interference fit between axle and the bearing, a plurality of bearings can't be installed on the major axis smoothly; For solving the assembly technology problem, often can't unify the diameter of axle of major axis, but need major axis be made multidiameter shaft; Like Fig. 1, when major axis 1 assembled with bearing, the diameter of axle of every section multidiameter shaft all need satisfy the interference fit with institute's running in bearings; So, first section 11 diameter of axle that requires major axis 1 is greater than second section 12 diameter of axle, and second section 12 diameter of axle is greater than the 3rd section 13 diameters of axle; And the bearing inner race diameter that cooperates with each section diameter of axle accordingly also will carry out fine finishing; To guarantee the interference assembling of each bearing and each section diameter of axle, bearing and multidiameter shaft erection drawing are as shown in Figure 2, and the internal diameter size of the bearing 21 among the figure, bearing 22, bearing 23 is different.This design is very high to the requirement on machining accuracy of axle, need finish grind axle and bearing, has increased the processing cost of axle and bearing greatly, has reduced the interchangeability between the component, has strengthened the difficulty of assembling and follow-up maintenance.

Because the defective that last known technology exists, the design people works out a kind of major axis of the utility model and the linkage structure of bearing according to the production design experiences of being engaged in related domain and association area for many years.

The model utility content

The purpose of the utility model is the linkage structure that is to provide a kind of major axis and bearing, and the assembling difficulty that it can reduce major axis and bearing has improved the interchangeability between the component, overcomes the defective of existing technology.

For this reason, the utility model proposes the linkage structure of a kind of major axis and bearing, and it includes major axis, bearing and tolerance ring; The outer surface of said tolerance ring is along circumferentially being interval with a plurality of raised lines, and each said raised line is along the setting that extends axially of said tolerance ring, and place, the two edges of its internal surface is formed with the ring convexity respectively; Wherein, On the said major axis ring groove is set, and said tolerance ring correspondence is embedded at said ring groove place, said bearing then correspondence is set on the said tolerance ring; Wherein, The ring of said tolerance ring is protruding to contact with the surface of said ring groove, and each said raised line correspondence of its outer surface stays on the inner peripheral surface of said bearing, and said bearing forms interference fit through said tolerance ring and said major axis.

The utility model also proposes the linkage structure of a kind of major axis and bearing, and it includes major axis, bearing and tolerance ring, and the internal surface of said tolerance ring is along circumferentially being interval with a plurality of raised lines; Each said raised line is along the setting that extends axially of said tolerance ring; And the two edges of its outer surface are formed with the ring convexity, and wherein, the inner peripheral surface of said bearing is provided with ring groove; And said tolerance ring correspondence is embedded in said ring groove; And be nested with on said major axis, wherein, the ring of said tolerance ring is protruding to contact with the surface of said ring groove; And each said raised line correspondence of its internal surface stays on the outer surface of said major axis, and said bearing forms interference fit through said tolerance ring and said major axis.

In sum; The major axis that the utility model proposes and the linkage structure of bearing; Through on major axis or bearing, ring groove being set, and the tolerance ring that is complementary of between setting, can realize the assembling between a plurality of bearings and the major axis; The outside dimension of further having unified major axis has reduced the requirement of major axis and bearing machining accuracy and the assembling difficulty of major axis and bearing; Owing to can adopt the bearing of same size model, further promoted manufacturability, the interchangeability of major axis and bearing assembling, reduced the cost of product processing and follow-up maintenance.

Description of drawings

Fig. 1 is the structural representation of existing major axis;

Fig. 2 is the linkage structure schematic representation of existing major axis and bearing;

Fig. 3 is the structural representation of major axis in the utility model;

Fig. 4 is the structural representation of the tolerance ring used in the utility model;

Fig. 5 is the sectional view of linkage structure of major axis and the bearing of the utility model;

Fig. 6 is that the major axis of the utility model is connected schematic representation with the part amplification of the linkage structure of bearing;

Fig. 7 is the structural representation of the tolerance ring used in another mode of execution of the utility model;

Fig. 8 is that major axis is connected schematic representation with the part amplification of the linkage structure of bearing in another mode of execution of the utility model.

The primary component label declaration:

3,3 ' major axis, 31 ring grooves

4,4 ' bearing, 41 ' ring groove

5,5 ' tolerance ring 51,51 ' raised line

52,52 ' ring is protruding

Embodiment

Understand for technical characteristics, purpose and effect to the utility model have more clearly, contrast the embodiment of description of drawings the utility model at present:

Fig. 3 is the structural representation of major axis in the utility model; Fig. 4 is the structural representation of the tolerance ring used in the utility model; Fig. 5 is the sectional view of linkage structure of major axis and the bearing of the utility model; Fig. 6 is that the major axis of the utility model is connected schematic representation with the part amplification of the linkage structure of bearing.

Referring to Fig. 3 to Fig. 6, a kind of major axis that the utility model proposes and the linkage structure of bearing, it includes major axis 3, bearing 4 and tolerance ring 5; The outer surface of said tolerance ring 5 is along circumferentially being interval with a plurality of raised lines 51, and each said raised line 51 is along the setting that extends axially of said tolerance ring 5, and place, the two edges of its internal surface is formed with ring protruding 52 respectively; Wherein, On the said major axis 3 ring groove 31 is set, and said tolerance ring 5 correspondences are embedded at said ring groove 31 places, 4 correspondences of said bearing are set on the said tolerance ring 5; Wherein, The ring of said tolerance ring 5 protruding 52 contacts with the surface of said ring groove 31, and each said raised line 52 correspondence of its outer surface stay on the inner peripheral surface of said bearing 3, and said bearing 3 is through said tolerance ring 5 and said major axis 3 formation interference fit.

When concrete the use; As shown in the figure; To be arranged with 3 bearings is that example is explained; Its working principle is: on major axis 3, cut 3 circular grooves 31 that are used for location tolerance ring 5, and major axis 3 is identical at the outside dimension except that circular groove 31, and this outside dimension and bearing bore diameter are Spielpassung; In assembly process; Each tolerance ring 5 correspondence successively is installed on each circular groove 31; Subsequently each bearing 4 correspondence is set on each tolerance ring 5, makes raised line 51 correspondences on each tolerance ring 5 shore inner peripheral surface, so that bearing 4 is fixed at bearing 4; Thus, can get the assembly (referring to Fig. 4 and Fig. 6) of corresponding major axis 3 and tolerance ring 5 and bearing 4.

Above-mentionedly know, in the utility model, owing to used tolerance ring; Can make the matching relationship between major axis and the bearing become Spielpassung, behind location tolerance ring on the circular groove, bearing packed into from major axis one end; It is pushed into the tolerance ring position, and then major axis and bearing form the interference fit relation through tolerance ring, can realize the transmission of moment of torsion and radial load; And need not again major axis to be processed into multidiameter shaft, further reduced working strength, improved efficiency of assembling.

Fig. 7 is the structural representation of the tolerance ring used in another mode of execution of the utility model; Fig. 8 is that major axis is connected schematic representation with the part amplification of the linkage structure of bearing in another mode of execution of the utility model.

To shown in Figure 8, the utility model also proposes the linkage structure of a kind of major axis and bearing like Fig. 7, and it includes major axis 3 ', bearing 4 ' and tolerance ring 5 '; The internal surface of said tolerance ring 5 ' is along circumferentially being interval with a plurality of raised lines 51 ', and each said raised line 51 ' is along the setting that extends axially of said tolerance ring 5 ', and the two edges of its outer surface are formed with ring protruding 52 '; Wherein, The inner peripheral surface of said bearing 4 ' is provided with ring groove 41 ', and said tolerance ring 5 ' correspondence is embedded in said ring groove 41 ', and is nested with on said major axis 3 '; Wherein, The ring of said tolerance ring 5 ' protruding 51 ' contacts with the surface of said ring groove 41 ', and each said raised line 51 ' correspondence of its internal surface stays on the outer surface of said major axis 3 ', and said bearing 4 ' is through said tolerance ring 5 ' and said major axis 3 ' formation interference fit.

Referring to Fig. 8; When concrete the use, this mode of execution at first is on the interior week of bearing 4 ', ring groove 41 ' to be set, and tolerance ring 5 ' correspondence is embedded wherein; Be nested with in the lump on major axis 3 ' subsequently; Make bearing 4 ' form interference fit through said tolerance ring 5 ' and said major axis 3 ', both pass through the interior male structure transmitting torque and the radial load of tolerance ring 5 ', thereby have avoided the further processing to major axis.

It is pointed out that above-mentioned tolerance ring 5,5 ' is existing technology, its concrete size is not done qualification, can select, do not do at this and give unnecessary details according to the major axis of required assembling and the specification of bearing.

The above appearance is the schematic embodiment of the utility model, is not in order to limit the scope of the utility model.Any those skilled in the art, equivalent variations of under the prerequisite of design that does not break away from the utility model and principle, having done and modification all should belong to the scope that the utility model is protected.

Claims

1. the linkage structure of major axis and bearing, it includes major axis, bearing and tolerance ring, and the outer surface of said tolerance ring is along circumferentially being interval with a plurality of raised lines; Each said raised line is along the setting that extends axially of said tolerance ring; And place, the two edges of its internal surface is formed with the ring convexity respectively, it is characterized in that, ring groove is set on the said major axis; And said tolerance ring correspondence is embedded at said ring groove place; Said bearing then correspondence is set on the said tolerance ring, and wherein, the ring of said tolerance ring is protruding to contact with the surface of said ring groove; And each said raised line correspondence of its outer surface stays on the inner peripheral surface of said bearing, and said bearing forms interference fit through said tolerance ring and said major axis.

2. the linkage structure of major axis and bearing, it includes major axis, bearing and tolerance ring, and the internal surface of said tolerance ring is along circumferentially being interval with a plurality of raised lines; Each said raised line is along the setting that extends axially of said tolerance ring, and the two edges of its outer surface are formed with the ring convexity, it is characterized in that; The inner peripheral surface of said bearing is provided with ring groove, and said tolerance ring correspondence is embedded in said ring groove, and is nested with on said major axis; Wherein, The protruding surface with said ring groove of the ring of said tolerance ring connects, and each said raised line correspondence of its internal surface stays on the outer surface of said major axis, and said bearing forms interference fit through said tolerance ring and said major axis.