CN2773390Y

CN2773390Y - Linear bearing

Info

Publication number: CN2773390Y
Application number: CN 200520068381
Authority: CN
Inventors: 梁忠; 蒋含斌
Original assignee: 陈锡生
Priority date: 2005-01-17
Filing date: 2005-01-17
Publication date: 2006-04-19
Anticipated expiration: 2015-01-17

Abstract

The utility model relates to a linear bearing. A transmission shaft installed on the linear bearing can be rotated and can also simultaneously do reciprocating linear movement. The linear bearing has the advantages of light wearing degree and long service life. The utility model is characterized in that the linear bearing comprises a square inner ring which is installed in a square groove of an outer sleeve, wherein the center of the inner ring is a circular through hole which is perpendicular to the bottom of the square groove; sandwich layers positioned on the left and the right sides of the through holes between the inner ring and the outer sleeve and a sandwich layer between the groove bottoms of the inner ring and the outer sleeve are provided with holding frames which are provided with rollers, and the cylindrical surfaces of the rollers are respectively contacted with the inner surface of the outer sleeve and the outer surface of the inner ring; a housing is sheathed with the open end of the square groove of the outer sleeve, and corresponds to the through hole of the inner ring, the bottom surface of the housing is provided with a long strip-shaped through hole, and the width of the long strip-shaped through hole is larger than the length of the diameter of the cylindrical through hole of the inner ring and is smaller than the distance between both parallel side surfaces of the inner ring.

Description

Linear bearing

(1) technical field

The utility model relates to established line bearing, is specially linear bearing.

(2) background technique

At machinery assembling and transmission field, adopt the ball ball bearing to realize installation between transmission shaft and the axle bed mostly.And rotate in axle bed usually the outer ring of transmission shaft and ball ball bearing, and the axle bed of some transmission device is used for bearings mounted hole is the long strip slotted eye, do reciprocating linear motion along axle bed when requiring transmission shaft to rotate, because the outer ring of ball ball bearing is that line contacts with axle bed, in the process that bearing moves not steadily, noise is bigger, again because the friction between bearing and the axle bed is sliding friction, sliding friction between not steady and bearing and the axle bed when bearing moves like this makes that the wearing and tearing of bearing are bigger, and the working life of bearing is shorter.

(3) summary of the invention

At having now at machinery assembling and transmission field, employing ball ball bearing is realized the installation between transmission shaft and the axle bed mostly, when rotating, the needs transmission shaft does reciprocating linear motion along axle bed, because the outer ring of ball ball bearing is that line contacts with axle bed, noise was bigger when bearing moved, the shortcoming that the wearing and tearing of bearing are big, working life is short, the utility model provides a kind of linear bearing, the transmission shaft that is mounted thereon can do reciprocating linear motion along axle bed when rotating, the degree of wear of bearing is light, and the working life of bearing is longer.

Its technological scheme is such: it is characterized in that: it comprises square inner ring, described square inner ring is installed on the square groove of overcoat, the centre of described inner ring is a manhole, described through hole is vertical with the bottom land of described square groove, the interlayer between the bottom land of the interlayer of the described through hole left and right sides and described inner ring and described overcoat between described inner ring and the described overcoat is equipped with retainer, described retainer is equipped with roller, the cylndrical surface of described roller respectively with the internal surface of described overcoat, the outer surface contact of inner ring, the open end fit of shell and described overcoat square groove, the through hole position of corresponding described inner ring, the bottom surface of described shell is provided with the long strip through hole, and the width of described long strip through hole is greater than the diameter length of described inner ring cylindrical hole, less than the distance between described inner ring two parallel side.

The utility model adopts after the said structure, inner ring can pump along the roller of sidepiece, thereby transmission shaft can pump together with inner ring when guaranteeing the transmission shaft rotation, and shell is fixed, avoided the friction between bearing and the bearing support like this, and be rolling friction between inner ring and the roller, wearing and tearing between the two are lighter, the working life of bearing is longer, thereby avoided existing employing ball ball bearing to realize installation between transmission shaft and the axle bed, when rotating, the needs transmission shaft does reciprocating linear motion the serious wear of bearing along axle bed, the shortcoming that working life is short.

(4) description of drawings

Fig. 1 is a plan view of the present utility model;

Fig. 2 is the sectional view of plan view of the present utility model;

Fig. 3 is that the A-A of Fig. 1 is to sectional view.

(5) embodiment

See Fig. 1, Fig. 2, Fig. 3, the utility model comprises square inner ring 2, square inner ring 2 is installed on the square groove of overcoat 5, the centre of inner ring 2 is manholes 3, through hole 3 is vertical with the bottom land of square groove, the interlayer between the bottom land of the interlayer of through hole 3 left and right sides and inner ring 2 and overcoat 5 between inner ring 2 and the overcoat 5 is separately installed with retainer 7,9 (see figure 3)s,

retainer

7,9 are separately installed with

roller

6,8,

roller

6,8 cylndrical surface respectively with the internal surface of overcoat 5, the outer surface contact of inner ring 2, the open end fit of the square groove of shell 1 and overcoat 5, through hole 3 positions of corresponding inner ring 2, the bottom surface of shell 1 is provided with long strip through hole 4, and the width of long strip through hole 4 is greater than the diameter length of inner ring 2 cylindrical holes 3, less than the distance between two parallel side of inner ring 2.

Claims

1, linear bearing, it is characterized in that: it comprises square inner ring, described square inner ring is installed on the square groove of overcoat, the centre of described inner ring is a manhole, described through hole is vertical with the bottom land of described square groove, the interlayer between the bottom land of the interlayer of the described through hole left and right sides and described inner ring and described overcoat between described inner ring and the described overcoat is equipped with retainer, described retainer is equipped with roller, the cylndrical surface of described roller respectively with the internal surface of described overcoat, the outer surface contact of inner ring, the open end fit of shell and described overcoat square groove, the through hole position of corresponding described inner ring, the bottom surface of described shell is provided with the long strip through hole, and the width of described long strip through hole is greater than the diameter length of described inner ring cylindrical hole, less than the distance between described inner ring two parallel side.