CN203627541U

CN203627541U - Curved groove ball bearing

Info

Publication number: CN203627541U
Application number: CN201320563914.XU
Authority: CN
Inventors: 郭康权; 鲁海霞; 田凯丽
Original assignee: Northwest A&F University
Current assignee: Northwest A&F University
Priority date: 2013-09-11
Filing date: 2013-09-11
Publication date: 2014-06-04
Anticipated expiration: 2023-09-11

Abstract

The utility model relates to a radial ball bearing device, and belongs to the field of general mechanical parts. The utility model discloses a radial ball bearing with a curved arc groove in order to overcome the shortcoming that the conventional bearing cannot realize axial displacement. The linear arc groove of the conventional ball bearing is changed into S-shaped curved arc groove, so that the bearing can realize reciprocating linear motion displacement during rotation. According to the technical scheme, the linear grooves in the inner ring and the outer ring of the conventional bearing are changed into curved grooves with completely symmetric shapes, and the total number of peaks and valleys of the curved grooves is equal to the number of steel balls or is an integral multiple of the number of the steel balls; therefore, in a process that the inner ring and the outer ring rotate, the shaft does periodically reciprocating linear motion during rotation. The curved groove ball bearing disclosed by the utility model has the advantages that (1) the rotary motion of the curved groove ball bearing can be changed into linear motion; (2) the mechanical structure of a rubbing roller can be simplified; (3) the curved groove ball bearing is simple in structure and small in size.

Description

A kind of bent ditch ball bearing

Technical field

The utility model relates to a kind of radial ball bearing device, belongs to General Mechanical Parts field, relates in particular to a kind of bent ditch ball bearing.

Background technique

General bearing is for positioning shaft parts, can flexible rotating, but can not produce the General Mechanical Parts of axial displacement.But for need to rotate in, the mechanism that can carry out axial displacement, as the motion of extruding and kneading roller, the use of general bearing will make mechanism become very complicated.

In order to simplify the mechanical structure of extruding and kneading roller, also for rotation motion is become to linear reciprocating motion by simpler method, the utility model discloses a kind of bent ditch ball bearing.

Summary of the invention

The technological scheme that realizes above-mentioned model utility is: the curved grooves that the straight-line groove of original bearing enclose is become to shape full symmetric, and " peak " of curved grooves and the number of " paddy " and the number of steel ball are equated, or be the integral multiple of steel ball number, like this, in the process of rotating at Internal and external cycle, axle, in rotating, will do periodically linear reciprocating motion.Particular content is:

A kind of bent ditch ball bearing, formed by an outer ring [1], one group of steel ball [2], one group of retainer [3] and an inner ring [4], it is characterized in that: described outer ring [1] and inner ring [4] are inlayed the groove of steel ball, wherein at least one serpentine curve arc groove that is end-to-end, another is lineal shape arc groove or serpentine curve arc groove; The number at " peak " of described serpentine curve arc groove and the number of " paddy " all equate with the number of one group of steel ball [2], or are the integral multiple of steel ball [2] number;

Described one group of steel ball [2] is arranged between outer ring [1] and inner ring [4] and after fixing with retainer [3], and the pitch (distances between adjacent two " peaks " or two " paddy ") of the spacing (distances between adjacent two steel balls) between the outer of steel ball [2] and the serpentine curve arc groove of outer ring [1] equates; Or the pitch of serpentine curve arc groove is the integral multiple of the spacing between the outer of steel ball [2];

Described one group of steel ball [2] is arranged between outer ring [1] and inner ring [4] and after fixing with retainer [3], and the interior edge of steel ball [2] equates with the pitch of the serpentine curve arc groove of inner ring [4]; Or the pitch of serpentine curve arc groove is the integral multiple of the spacing between the interior edge of steel ball [2];

Described one group of retainer [3] has three kinds of structures: first retainer [3] is rigidly attached to one with inner ring [4]; Two to be retainers [3] be rigidly attached to one with outer ring [1] for it; It three is that retainer [3] is not rigidly connected with inner ring [4], is not also rigidly connected with outer ring [1], keeps free state;

The serpentine curve arc groove of described end-to-end, its adjacent two joints are curve or the straight line of shape full symmetric.

The disclosed bent ditch ball bearing of the utility model has following advantage:

(1) rotation motion can be become to straight line motion;

(2) can simplify the mechanical structure of rubbing roller;

(3) simple in structure, volume is little.

Accompanying drawing explanation

Fig. 1 is that inner ring is displaced to the left side, i.e. the structural representation of the bent ditch ball bearing of steel ball in the time of summit

Fig. 2 is that inner ring is displaced to the right, the i.e. structural representation of the bent ditch ball bearing of steel ball in the time of the lowest point

Fig. 3 is the shape schematic diagram after launch the outer ring of curve arc groove

Fig. 4 is the shape schematic diagram after the inner ring of Straight Line and Arc groove launches

The meaning that in accompanying drawing, each legend mark represents is respectively as follows:

1-outer ring, 2-steel ball, 3-retainer, 4-inner ring

Embodiment

Provide specific embodiment below in conjunction with accompanying drawing.

Outer ring [1] is made curve arc groove by an embodiment of the present utility model, and inner ring [4] is made to Straight Line and Arc groove, the rotation that is fixed together of retainer [3] and inner ring [4], and the number at the number of steel ball and " peak " of curve and " paddy " is equated.The bent ditch ball bearing that the bent ditch ball bearing of making is like this active roll.In the bent ditch ball bearing that is straight-line groove at inner ring [4], also retainer [3] can be made to the structure of free state, the bent ditch ball bearing that the bent ditch ball bearing of this spline structure is passive swing.The bent ditch ball bearing mounted in pairing mode of the bent ditch ball bearing of active roll and passive swing, can reduce mounting point permissible accuracy.

Also the arc groove of outer ring [1] and inner ring [4] all can be made to curvilinear structures, can increase like this amplitude of fluctuation, reduce the difficulty that mounting point requires simultaneously.

These principles are identical, and structural change can form other mode of executions of the present utility model.

Claims

1. a bent ditch ball bearing, formed by an outer ring [1], one group of steel ball [2], one group of retainer [3] and an inner ring [4], it is characterized in that: described outer ring [1] and inner ring [4] are inlayed the groove of steel ball, wherein at least one serpentine curve arc groove that is end-to-end, another is lineal shape arc groove or serpentine curve arc groove; The number at " peak " of described serpentine curve arc groove and the number of " paddy " all equate with the number of one group of steel ball [2], or are the integral multiple of steel ball [2] number.

2. bent ditch ball bearing according to claim 1, it is characterized in that: described one group of steel ball [2] is arranged between outer ring [1] and inner ring [4] and after fixing with retainer [3], and the pitch (distances between adjacent two " peaks " or two " paddy ") of the spacing (distances between adjacent two steel balls) between the outer of steel ball [2] and the serpentine curve arc groove of outer ring [1] equates; Or the pitch of serpentine curve arc groove is the integral multiple of the spacing between the outer of steel ball [2].

3. bent ditch ball bearing according to claim 1, it is characterized in that: described one group of steel ball [2] is arranged between outer ring [1] and inner ring [4] and after fixing with retainer [3], and the interior edge of steel ball [2] equates with the pitch of the serpentine curve arc groove of inner ring [4]; Or the pitch of serpentine curve arc groove is the integral multiple of the spacing between the interior edge of steel ball [2].

4. bent ditch ball bearing according to claim 1, is characterized in that: described one group of retainer [3] has three kinds of structures: first retainer [3] is rigidly attached to one with inner ring [4]; Two to be retainers [3] be rigidly attached to one with outer ring [1] for it; It three is that retainer [3] is neither rigidly connected with inner ring [4], is not also rigidly connected with outer ring [1], keeps free state.

5. bent ditch ball bearing according to claim 1, is characterized in that: the serpentine curve arc groove of described end-to-end, its adjacent two joints are curve or the straight line of shape full symmetric.