JP2540164Y2 - Rolling bearing for finite linear motion - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling bearing for finite linear motion, and more particularly to a finite linear bearing capable of preventing displacement of a bearing retainer by incorporating a mechanism such as a wire or a belt (hereinafter referred to as a string-shaped member). The present invention relates to a rolling bearing for driving.

[0002]

2. Description of the Related Art Conventionally, as a device for preventing displacement of a retainer using a mechanism such as a wire or a belt of this type, a device disclosed in Japanese Patent Application Laid-Open No. 56-113824 is known. . In this device, pulleys are attached to both ends of a retainer, the upper and lower transfer surfaces are connected by belts via the respective pulleys, and the movement of the retainer is restricted to half of the bearing by the pulleys and the belt, and the belt is used to prevent dust. Is what you do.

[0003]

However, in the conventional device for preventing the displacement of the retainer using a belt, the pulley is provided outside the track member, so that the entire bearing is disadvantageously long. Further, in the conventional device, since the pulley is provided outside the track member, the entire retainer becomes long and the load of the pulley is applied, so that the retainer is easily deformed, and partial abnormal wear and sliding are caused. There is a disadvantage that the resistance increases and the life of the bearing by the slip prevention device is shortened.

In view of the above, the present invention has been made in view of the above-mentioned drawbacks of the prior art. The entirety of the displacement prevention mechanism including the cage and the pulley is housed in the track base to reduce the size of the cage, and to reduce the deformation and part of the cage. It is an object of the present invention to provide a rolling bearing for finite linear motion capable of preventing abnormal abnormal wear and increase of sliding resistance and preventing displacement of a cage.

[0005]

SUMMARY OF THE INVENTION A rolling bearing for finite linear motion according to the present invention is inserted between a pair of raceways having a raceway groove having a substantially V-shaped cross section for rolling on a longitudinal side surface.
A thin plate-shaped retainer integrally formed with a plurality of windows on a main surface of which a plurality of rolling elements are rotatably held at predetermined intervals, and a retainer fixed to a longitudinal end of the retainer; A position preventing mechanism for the retainer, comprising a pair of rotating members rotatably attached to and fixed to a member, and a string-like member endlessly wound around the rotating member; The shift prevention mechanism is configured such that one string-shaped member between the rotating bodies is coupled to one track, the other string-shaped member is coupled to the other track, and housed in the pair of track. It is configured to be. In addition, the rolling bearing for finite linear motion according to the present invention has a rolling section substantially V
-Shaped raceway groove is formed, and is inserted between the raceway grooves of a pair of raceways having a clearance groove formed in the longitudinal direction of the raceway groove, and a plurality of rolling elements are rotatable at predetermined intervals on the main surface. A thin plate-shaped retainer having a plurality of windows held therein and integrally formed, and a holding member fixed to a longitudinal end portion of the retainer, the outer periphery of which corresponds to the relief groove of the track groove, and A rotating body which is rotatably mounted and fixed in a direction orthogonal to the main surface of the retainer, and which is wound around the rotating body and is accommodated in the clearance groove, and both ends of which are provided on a longitudinal end face of the track base; And a cage-shaped member for preventing displacement of the retainer, which is constituted by a string-shaped member to which is fixed, wherein the mechanism for preventing displacement of the retainer is configured to be housed in the pair of track bases. It is.

[0006]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is an exploded perspective view of the rolling bearing for finite linear motion according to the present invention, FIG. 2 is a plan view of the assembled rolling bearing for finite linear motion of FIG. 1, and FIG. 3 is a view from the side of FIG. .

As shown in FIG. 1, a substantially rectangular parallelepiped way 1 is used.
And 2 are formed with screw holes for fixing on the upper surface,
Its side surface, the trajectory of the plurality of cylindrical rollers (rolling _{elements) 4} (4 1 ~4 n) cross section substantially V-shaped to guide rolling movement without circulation held in a thin plate-shaped retainer 3 which is formed integrally Grooves 1a and 2a are formed in the longitudinal direction. The raceway grooves 1a and 2a of the raceways 1 and 2 are arranged so as to face each other. It is screwed into screw holes 1b and 2b formed at both ends in the direction.

[0008] The retainer 3 has a plurality of windows 3a _(3a 1 to 3 A _n) are formed at predetermined intervals, the window 3a
_(3a 1 ~3a _n) the cylindrical roller in the _{4 (4} 1 _~4 n)
Are alternately arranged such that the central axes of the adjacent rollers intersect at right angles. The arrangement of the cylindrical roller ₄ (4 1 ~4 _n), against a load of any direction, it is possible to elastic deformation amount is increased less rigidity. Retainer 3 plurality of cylindrical rollers held in the _{4 (4} 1 _{~4 n)} is raceway grooves 1a and 2
It is held so that it can roll between a. At both ends in the longitudinal direction of the retainer 3, substantially H-shaped holding members 7 and 8 are attached and fixed. Free ends of the holding members 7 and 8 are centered on pins 11 and 12 serving as rotation axes. Pulleys 9 and 10 are rotatably held as rotating bodies. A groove having a predetermined depth is formed on the outer periphery of the pulleys 9 and 10, and a wire 13 as a cord-like member is wound around the groove. The diameter of the pulleys 9 and 10 is configured to be slightly larger than the height h of the retainer 3 shown in FIG. This is to prevent the wire 13 as a cord-like member from contacting the retainer 3.

[0009] The entire displacement prevention mechanism including pulleys 9 and 10 rotatably held via holding members 7 and 8 fixed to the retainer 3 is provided inside the track bases 1 and 2, that is, the track. It is small enough to be accommodated within the height and length of the tables 1 and 2. The holding members 7 and 8 fixed to the holder 3 may be attached and fixed using windows 3a formed in the holder. Further, a fixing plate 14 is attached to the wire 13 laid on the upper and lower surfaces of the cage 3.
And 15 are fixedly mounted at one end thereof,
Is screwed into a screw hole 1c formed on the upper surface of the track base 1 by a set screw 16, and the other end of the fixing plate 15 is
A screw hole 2c formed on the lower surface of the way 2 is screwed together by a set screw 17. The fixing plates 14 and 15 to which the wires 13 are fixed are configured so as not to contact the holder 3.

Next, the operation of this embodiment having the above configuration will be described. As shown in FIGS. 1 to 3, when the track 1 and the track 2 are relatively moved, the fixed plates 14 and 15 fixed to the track 1 and 2 also move together, and at the same time, The wire 13 fixed to the other end is also moved. Since this wire 13 is wound around the pulleys 9 and 10,
The amount of movement of the cage 3 to which the pulleys 9 and 10 are attached and fixed via the holding members 7 and 8 is regulated to １ ／ of the amount of movement of the rails 1 and 2. Therefore, even if the rails 1 and 2 are frequently moved, it is possible to reliably prevent the cage from shifting.

FIG. 4 is a view showing another embodiment of the rolling bearing for finite linear motion according to the present invention. In addition, about the member etc. which have the same structure as FIG. 1 thru | or FIG. 3, only the difference is demonstrated below using the same code | symbol.

The rolling bearing for finite linear motion shown in FIG. 4 can prevent the displacement of the cage 3 when the way 1 and the way 2 are used vertically (hereinafter also referred to as Z direction). As shown in FIG. 4, a pulley 2 having a groove formed on the outer periphery by a holding member 20 attached and fixed to one end of a cage 3.
1 is rotatably held by a pin 23 serving as a rotation axis in a direction orthogonal to the holder. A wire 22 is wound around the outer circumference of the pulley 21, and the end of the wire 22 is wound around end screws 5 and 6 and screwed to the way 1 and 2. The pulley 21 has a substantially V shape formed on the way 1 and 2.
The wire 22 wound around the pulley 21 has a size that is accommodated in the V-shaped raceway groove.
Relief grooves 1d and 2d formed in the longitudinal direction substantially at the center of
It is configured to be stored inside.

With the above-described configuration, it is possible to prevent the holder 3 from falling due to the weights of the rails 1 and 2 falling in the Z direction due to its own weight, and to reduce the amount of movement of the holder 3 by the rails 1 and 2. Can be restricted to の of the moving amount of.

In this embodiment, the pulley 9 is used as a rotating body.
And 10 (21), but it may be configured to use a belt using pins instead of the pulley 6,
Further, the configuration may be such that a ball is used in place of the cylindrical roller as the rolling element, and the shape of the raceway groove may have a radius slightly larger than the radius of the ball.

[0015]

According to the present invention, as described above, according to the present invention, the size of the entire displacement prevention mechanism including the retainer and the pulley is configured to be small in the way, and the retainer is deformed or partially abnormal. This has the effect of preventing the wear and the sliding resistance from increasing and also preventing the cage from being displaced. Further, according to the present invention, with a simple configuration, there is an effect that the movement of the cage can be restricted to の of the movement amount of the way. Further, according to the present invention, since the pulley and the like are attached to the retainer, assembly is easy, and there is an effect that accumulated errors due to assembly of parts can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a rolling bearing for finite linear motion according to the present invention.

FIG. 2 is a plan view showing a state where the rolling bearing for finite linear motion of FIG. 1 is assembled.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a view showing another embodiment of the rolling bearing for limited linear motion according to the present invention.

[Explanation of symbols]

 Reference numerals 1 and 2 3 Tracks 3 Cages 4 Cylindrical rollers (rollers) 5, 6 End screws 7, 8, 20 Holding members 9, 10, 21 Pulleys 11, 12, 23 Pins 13, 22 Wires 14, 15 Fixing plate 16 , 17 Set screw

Claims (2)

(57) [Scope of request for utility model registration] 1. A pair of raceways having a raceway groove having a substantially V-shaped cross section for rolling on a longitudinal side surface, and is inserted between raceway grooves of a pair of raceways.
A thin plate-shaped retainer integrally formed with a plurality of windows on a main surface of which a plurality of rolling elements are rotatably held at predetermined intervals, and a retainer fixed to a longitudinal end of the retainer; A pair of rotating members rotatably attached to and fixed to a member; and a string-like member endlessly hung over the rotating members. The shift prevention mechanism is configured such that one string-shaped member between the rotating bodies is coupled to one track, the other string-shaped member is coupled to the other track, and housed in the pair of track. A rolling bearing for finite linear motion characterized by being made. 2. A raceway groove having a substantially V-shaped cross section for rolling is formed on a longitudinal side surface, and is inserted between a raceway groove of a pair of raceways having a relief groove formed in a longitudinal direction of the raceway groove, A thin plate-shaped retainer integrally formed with a plurality of windows on a main surface of which a plurality of rolling elements are rotatably held at predetermined intervals, and a retainer fixed to a longitudinal end of the retainer; A rotating body whose outer periphery corresponds to the relief groove of the raceway groove and is rotatably mounted and fixed in a direction perpendicular to the main surface of the retainer; And a string-shaped member having both ends fixed to the longitudinal end face of the track base, and a cage-position shift prevention mechanism, wherein the cage-position shift prevention mechanism comprises: A finite linear motion roller, which is housed in the pair of rails. Rolling bearing.