JPH0262420A - Roller linear guide device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a roller linear guide device.

[Conventional technology]

As a conventional roller linear guide device, JP-A-63-
There is one presented in the No. 26417 publication. In this conventional example, as shown in FIGS. 6 to 9, a slider 2 that straddles a linear guide rail 1 moves through the transfer of a large number of rollers R that endlessly circulate within the slider 2. , is a roller-type linear guide device that can perform infinite linear motion, and the circulation path of the roller R is composed of a load area and a non-load area, and the load area is located at right angles between the guide rail 1 and the slider 2, which face each other. It consists of a load track 5 formed by a 7-shaped groove 3.4, and the no-load area includes a straight turn hole 6 formed in the slider 2 parallel to the load track, and the load track 5 and return hole 6. and a direction change path (curved path) 7 that communicates with both ends of the roller to change the direction of the roller.

Therefore, the axial end of the right-angled 7-shaped groove 4 of the slider 2 is
As shown in FIG. 7, it is connected to a direction change path 7 curved in a half-donut shape via an inclined flank 8 inclined in the axial direction at an angle θ. This inclined flank surface 8 is
While holding the workpiece slider 2 in an inclined position at an angle θ, the rotary grinding wheel 9 having a V-shaped cross section with an intersecting angle α is moved to the eighth rotary grinding wheel 9.
As shown in the figure, it is formed by moving horizontally in the direction of the arrow mark IO and grinding in a separate process from the right-angled 7-shaped groove on the workpiece.

[Problem to be solved by the invention]

However, in the conventional roller linear guide device described above, the axial end of the right-angled seven-shaped groove 4 of the slider 2 is formed as an inclined surface 8 having an angle of θ with respect to the groove surface of the right-angled seven-shaped groove 4. ing. Therefore, the portion where the straight portion passes through the inclined flank surface 8 and reaches the direction change path 7 is rounded. When the roller R passes through this angular discontinuity, the slider 2 makes slight vibrations. Therefore, the roller linear guide device cannot be used as a linear guide device for ultra-precision processing machines or measuring devices.

The present invention has been made with attention to such conventional problems, and an object of the present invention is to provide a roller linear guide device that does not cause shaking due to roller transfer.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a guide rail that extends in the axial direction and has a single-shaped raceway groove in the axial direction on both sides thereof, and a guide rail that straddles the guide rail so as to be movable along the track. 1 facing the 1-shaped raceway groove of the guide rail.
a slider having a 1-shaped raceway groove on its inner surface and a roller passage parallel to the 1-shaped raceway groove, the slider having the roller passage and the opposing 1-shaped raceway groove at both axial ends of the slider. A curved path is provided to communicate with the roller path, and the WJ circular communication path is formed by the single-shaped raceway groove and the curved path that face these roller paths, and a large number of rollers are allowed to circulate endlessly within the circulation path. In the roller linear guide device, both ends in the axial direction of the single-shaped raceway groove of the slider are formed into a smooth curved path that is continuously connected to an inner curved surface of the curved path, and the curved path is connected to the inner circumferential curved surface of the curved path. 8K is a grinding wheel with a V-shaped cross section when forming a single-shaped raceway groove.It is constructed with a crown formed by gradually increasing the depth of cut at both ends of the single-shaped raceway groove in the axial direction. be.

[Effect]

Both axial ends of the single-shaped raceway groove of the slider are configured with crowns formed by gradually increasing the cutting stars of the grinding wheel, which has a V-shaped cross section, so there is no angularity, and the roller slides extremely smoothly. from the single-shaped raceway groove of the slider to the curved path, and from the curved path to the single-shaped raceway groove of the slider. Therefore, the slider does not shake due to the transfer of the rollers.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

1 to 5 show one embodiment of the present invention.

This roller type linear guide includes a guide rail 21 that extends in the axial direction, and a slider 22 that has a U-shaped cross section and is mounted so that it can move relative to the guide rail 21 through a small gap. The slider 22 has a slider body 2.
2A, and end caps 35 respectively joined to both the front and rear ends thereof. 1-shaped raceway grooves 23 are symmetrically provided on both left and right side surfaces of the guide rail 21, and in this embodiment, the upper surface 23 of the 1-shaped raceway groove 23
A and the lower surface 23B intersect at right angles.

On the other hand, an axial V-shaped raceway groove 26 facing the single-shaped raceway groove 23 is formed on the inner surface of both sleeves 25 of the main body 22A of the slider 22, and these opposing grooves serve as a load raceway. A roller rolling path 27 having a substantially square cross section is configured. A roller passage 28 is formed in the thick wall portions of both sleeve portions 25 of the slider body 22A, parallel to the single-shaped raceway groove 26, and extending through the roller passage 28 in the axial direction.

On the other hand, the end caps 35, which are joined to both the front and rear ends of the slider body 22A, are curved in a semicircular arc and have a 1-shaped guide surface 36A on the outer circumferential side and a 7-shaped guide surface 36B on the inner circumferential side. A curved path 36 having a substantially square cross section is formed. This curved path 36 connects the roller rolling path 26, which is a loaded area, to the unloaded roller path 28.

The roller rolling path 27, the roller path 28, and the curved path 3
6, a circulation passage 39 is formed, and the circulation passage 39
A large number of rollers R are loaded therein and circulate endlessly. These rollers R are cylindrical rollers with a square joint cross section, and are cross rollers in which the directions of the rotation axes of adjacent rollers are alternately different by 90 degrees.

The V-shaped raceway groove 26 of the slider body 22A is formed by a grinding wheel 9 that matches the required groove shape, and both ends of the groove in the axial direction are located inside the curved path 36 as shown in FIGS. 1 and 2. It is a smooth curved path 40 that is continuously connected to the 7-shaped guide surface 36B on the circumferential side.

This curved path 40 is formed by gradually increasing the amount of cut at both axial ends of the V-shaped raceway groove of the grinding wheel 9, which has a V-shaped cross section, when forming the V-shaped raceway groove 26 of the slider. It consists of a crown. That is, as shown in FIGS. 4 and 5, the V-shaped track groove 26
At both ends in the axial direction, the grinding wheel 9 is fed in the axial direction of the slider body 22A, which is the workpiece to be ground (arrow mark 41), and by a small amount in the right angle direction (arrow mark 42), a large radius of curvature is created. It has a smooth round shape with r.

In FIG. 1, reference numeral 43 indicates a tapped hole for a bolt for fixing a driven body such as a table to the slider 22 when using the linear guide device.

Next, the operation of the above embodiment will be explained.

When the slider 22 on the guide rail 21 is moved in the axial direction, the roller R is moved within the roller rolling path 27 as the slider 22 moves. At the end of the slider 22, the slider 22 is guided by the curved path 40 and changes direction, making a U-turn along the curved path 36. Next, slider body 22A
It passes through the roller passage 28 and is again U-turned by the curved passage 36 of the opposite end cap to form the roller rolling passage 2'7.
The cycle of returning to work and continuing the transfer is repeated.

Therefore, both ends in the axial direction of the V-shaped raceway groove 26 of the slider constituting the roller rolling path 27 have a smooth surface that is continuously connected to the 7-shaped guide surface 36B on the inner peripheral side of the curved path 36. Since the path is curved 4o, there are no corners at the connection points. As a result, the roller R moves very smoothly from the V-shaped raceway groove 26 of the slider into the curved path 36 and at the opposite end into the curved path 36.
This allows the slider to move from the V-shaped raceway groove 26 to the V-shaped raceway groove 26 of the slider, and the slider 22 does not shake due to the transfer of the roller R.

〔Effect of the invention〕

As described above, according to the present invention, both axial ends of the V-shaped raceway groove of the slider are formed into a smooth curved path that is continuously connected to the inner curved surface of the curved path. The path was formed by a crown formed by gradually increasing the incision at both ends of the V-shaped raceway groove in the axial direction of a grinding wheel having a cross-sectional shape of ■ when forming the V-shaped raceway groove of the slider. . Therefore, the connection point between the V-shaped raceway groove 26 of the slider and the curved path 36 is not angular, and the roller R
The effect is that it is possible to provide a roller linear guide device in which the slider 22 does not shake due to transfer.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the present invention, FIG. 1 is a partially cutaway plan view, FIG. 2 is an enlarged view of the part shown in FIG. Fig. 4 and Fig. 5 are schematic diagrams explaining the formation of a crown shape, Fig. 6 is a diagram corresponding to Fig. 3 showing a conventional roller linear guide device, and Fig. 7 is a diagram corresponding to Fig. 3. 2 is a diagram corresponding to FIG. 2, FIG. 8 is a diagram corresponding to FIG. 5, and FIG. 9 is an outline diagram of the grinding wheel. 21 is a guide rail, 22 is a slider, 23 is a V-shaped raceway groove of the guide rail, 26 is a V-shaped raceway groove of the slider, 27
is a roller rolling path, 28 is a roller passage, 36 is a curved path, 3
9 is a circulation path, R is a roller, and 40 is a curved path. r71 薗ゝ39 2A ・35 Concave Daikyo 2A and A Figure Diagram Figure Figure Cause

Claims (1)

[Claims] (1) A guide rail that extends in the axial direction and has an axial V-shaped raceway groove on both sides thereof, and a guide rail that straddles the guide rail so as to be movable along the track.
a slider having a V-shaped raceway groove on its inner surface facing the V-shaped raceway groove and a roller passage parallel to the V-shaped raceway groove; A curved path is provided that communicates with the opposing V-shaped raceway grooves, and a circulation path is formed by the roller path, the opposing V-shaped raceway groove, and the curved path, and a large number of rollers are endlessly moved in the circulation path. In the roller linear guide device configured to circulate, both axial ends of the V-shaped raceway groove of the slider are smooth curved paths that are continuously connected to the inner curved surface of the curved path, The curved path is a crown formed by gradually increasing the amount of cut at both axial ends of the V-shaped raceway groove of a grinding wheel having a V-shaped cross section when forming the V-shaped raceway groove of the slider. A roller linear guide device characterized by comprising: