JPH081292Y2 - Roller linear guide device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a roller linear guide device suitably used for a linear guide portion in a machine tool or various industrial machines, and more particularly to a roller rolling guide rail and a slider. The position of the moving surface can be accurately identified by a simple measuring method.

[Conventional technology]

A conventional roller linear guide device is disclosed in, for example, Japanese Patent Publication No. 62-24649. As shown in FIG. 7, this product is provided with a projecting portion 2 in the width direction on the top of a rail (guide rail) 1 and at its corner, there are two upper and lower inclined roller transfer surfaces (track surfaces) 3 , 4 are provided so that the extension lines are orthogonal to each other. On the other hand, this way 1
A slide base (slider) 5 which is movably mounted on the shaft so as to be movable in the axial direction.
Includes an elastically deformable top plate 6 and a pair of slide base halves 7 attached to both sides of the top plate 6. The slide base half 7 has an inclined upper portion 8 and an inclined lower portion 9 which intersect each other on an extension line, and the load of the roller endless track is axially provided on the lower surface side of the inclined upper portion 8 and the upper surface side of the inclined lower portion 9, respectively. A load groove 11 having a rolling surface forming a zone is formed. Moreover, on the upper surface side of the inclined upper portion 8 and the lower surface side of the inclined lower portion 9,
An unloaded portion 12 forming a roller endless track is formed corresponding to the load groove 11 along the axial direction thereof.
Further, the tip of the inclined upper portion 8 and the inclined lower portion 9 of each slide base half body 7 are
Two pairs of roller guides 13, which cooperate with the loaded grooves 11 and the unloaded portions 12 of the upper inclined portion 8 and the lower inclined portion 9 to form a roller endless track, are attached by screws 14 to the tip of the.

In the roller endless track formed on each of the slide base halves 7, the load groove 11 on the slide base half 7 side and the rolling surface 3 on the raceway side 3 are formed.
A large number of rollers R, which apply a load to (4), are inserted in a circulating manner.

[Problems to be solved by the device]

In order to obtain a highly accurate roller linear guide device, it is necessary to accurately identify the position of each load groove and raceway surface of the raceway base and the slide base. In the above-mentioned conventional example, the position of the load groove 11 of the slide base 5 is measured by measuring the distance in the up-down direction and the left-right direction by applying an elongated precision cylindrical or ball-shaped probe to the V-shaped recess of the groove. Then, the groove position can be identified. However, the rolling surfaces 3 and 4 of the raceway 1 are only formed as inclined surfaces at the corners of the projecting portion 2 in the width direction and do not have V-shaped recesses. Therefore, there is a problem that a simple position measuring method using the above-mentioned probe cannot be applied.

Therefore, the present invention has been made by paying attention to the above-mentioned conventional problems, and the purpose thereof is to provide a simple position measuring method for both the guide rail track surface and the slider track surface using a probe. An object of the present invention is to provide a compact roller linear guide device which can identify the orbital position, has high accuracy, has a minimum measurement cost, and is compact.

[Means for solving the problem]

In order to achieve the above-mentioned object, guide rails each having a track surface formed on the slope of the overhanging portion protruding from both sides in a trapezoidal shape,
It has a saddle shape and has a raceway surface that is movable in the axial direction across the guide rail and that opposes the raceway surface of the guide rail, and has roller return passages parallel to the raceway surface as through-holes in the wall thickness. A roller linear guide device comprising the formed slider and a large number of cylindrical rollers rotatably arranged between the track surface of the slider and the track surface of the guide rail. A roller having an asymmetric V-shaped groove formed on one side edge of each raceway surface and having a width orthogonal to the raceway surface and narrower than the width of the raceway surface and inclined at the same gradient with respect to the horizontal direction. A guide tsuba was installed.

 The rollers can also be hollow rollers.

[Operation] Both the raceway surface of the guide rail and the raceway surface of the slider are provided at the side edge of the raceway surface, which is orthogonal to the raceway surface and has a width narrower than the width of the raceway surface and extended in the axial direction. Because of that, V
A letter-shaped recess is formed. By placing a tracing stylus on the V-shaped concave portion formed by the raceway surface and the collar, the groove positions in the vertical direction and the horizontal direction can be easily identified.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 and 2 show a first embodiment of the present invention. In this roller linear guide device, the guide rail 20 extending in the axial direction and having a substantially rectangular cross section has a trapezoidal shape protruding in the width direction at the upper portion of the guide rail 20. An upper raceway surface 22 and a lower raceway surface 23 having a contact angle of 45 ° are formed at the upper and lower corners of the left and right overhanging portions 21, respectively.
The upper raceway surface 22 is a slope having a width L1 that is inclined downward by 45 ° toward the outside of the rail, and the lower raceway surface 23 is a slope having a width L1 that is inclined upward by 45 ° toward the outside of the rail.

The base of the upper end of the upper raceway surface 22 is formed so as to bite into the side surface of the guide rail 20, and has a width 1 that is orthogonal to the upper raceway surface 22 and narrower than the width L1 of the raceway surface and extends in the axial direction. An upper roller guide collar 24 is provided. As a result, an asymmetric V-shaped recess 26 is formed at the base of the upper raceway surface 22.

Further, the lower raceway surface 23 is formed such that the base portion at the lower end bites into the side surface of the guide rail 20, and the lower raceway surface 23 is formed at the base portion.
An axially extending lower roller guide collar 25 having a width 1 orthogonal to 23 and narrower than the width L1 of the raceway surface is provided.
As a result, an asymmetric V-shaped recess is formed at the base of the lower raceway surface 23.
27 are formed.

The slider 30 has a U-shaped cross section with a recess 31 in the center, and is loosely fitted across the guide rail 20 in a saddle shape with a clearance C so as to be movable in the axial direction. The slider 30 is formed with an upper raceway surface 32 facing the upper raceway surface 22 of the guide rail 20 and a lower raceway surface 33 facing the lower raceway surface 23 on the inner surface of the recess 31.

The upper raceway surface 32 of the slider 30 is a slope having a width L1 that is inclined at a downward slope of 45 ° from the inner surface of the recess 31 toward the inside of the slider, and the lower raceway surface 33 extends from the inner surface of the recess 31 toward the inside of the slider. It is also a slope with a width of L1 that is inclined at an upward slope of 45 °.

The base of the lower end of the upper raceway surface 32 is formed by biting into the side surface of the slider 30, and has a width 1 which is orthogonal to the upper raceway surface 32 and narrower than the width L1 of the raceway surface and extends in the axial direction. An upper roller guide collar 34 is provided. As a result, an asymmetric V-shaped recess 36 is formed at the base of the upper raceway surface 32.

The lower raceway surface 33 is formed such that the base portion at the upper end bites into the side surface of the slider 30, and the lower raceway surface 33 is formed at the base portion.
An axially extending lower roller guide collar 35 having a width 1 narrower than the width L1 of the raceway surface is provided. As a result, an asymmetric V-shaped recess 37 is formed at the base of the lower raceway surface 33.
Are formed.

Inside the slider 30, an upper roller return passage 38 parallel to the upper raceway surface 32 and a lower roller return passage parallel to the lower raceway surface 33 are provided.
39 and 39 are respectively formed as square holes penetrating the slider body 30A in the axial direction. The upper roller return passage 38 is arranged on the contact angle direction line la of the roller R rolling between the upper raceway surface 32 and the upper raceway surface 22 of the guide rail. The lower roller return passage 39 is arranged on the contact angle direction line lb of the roller R rolling between the lower raceway surface 33 and the lower raceway surface 23 of the guide rail.

End caps 30B having a U-shaped cross section are attached to the front and rear ends of the slider body 30A, and the upper raceway surface 32 and the upper roller return passage 38 are connected to the joint end surface of the end cap 30B with the slider body 30A. An upper curved path 40, and a lower curved path 41 that connects the lower raceway surface 33 and the lower roller return path 39 are provided. The curved path 40 (41), the roller return path 38 (39), the raceway surface 32 (33), and the raceway surface 22 (23) of the guide rail constitute a roller circulation path, and the roller circulation path has a square vertical cross section. A large number of cylindrical rollers R are inserted.

Note that G is a return guide that forms the inner peripheral surface of the curved path 40 and guides the direction change of the roller R. Further, 42 is a mounting bolt hole for mounting the guide rail 20 to the base, 43
Is a screw hole for attaching the transported object to the slider 30.

 Next, the operation will be described.

The manufactured guide rail 20 and slider body 30A are subjected to precise measurement of the track position in an inspection process before being assembled.

The track position of the guide rail 20 can be identified as shown in FIG. That is, with respect to the position of the upper raceway surface 22, a slender cylinder of the tracing stylus 45 is applied to a V-shaped concave portion 26 formed by the upper raceway surface 22 and the upper roller guide collar 24 formed at the base of the upper raceway surface 22, and the cylinder The vertical position is identified by measuring the distance H1 between the upper surface and the reference plane P. Further, the position in the left-right direction is identified by measuring the distance W1 between the cylindrical outer surfaces of the tracing stylus 45 applied to the left and right V-shaped recesses 26. Similarly for the position of the lower raceway surface 23,
The distance H2 between the reference planes P and the distance W2 between the left and right sides are measured.

Specifically, a master guide rail having a standard size is prepared, and a measuring instrument having a ball that fits into the V-shaped recess 26 at the measurement end is used to measure the corresponding recess of the guide rail 20 of the subject.
The 26 positions may be compared and measured with the master to determine whether they are within the allowable range.

Regarding the positions of the upper and lower raceway surfaces 32, 33 of the slider body 30A, the V-shaped recess 3 formed by the upper and lower roller guide collars 34, 35 is also formed.
It can be easily identified by applying a probe to 6,37 and comparing it with the master in the same manner as above.

This makes it possible to provide a highly accurate roller linear guide device at an extremely low measurement cost.

Regarding the operation of this roller linear guide device, the movement of the rollers R in the four rows of the roller infinite circulation path is the same in the vertical and horizontal directions, so only one row will be described, and the others will be omitted.

Using the rail mounting bolt holes 42 of the guide rail 20, the guide rail 20 is bolted to a predetermined location such as a bed of a machine tool. The slider 30 hung on the fixed guide rail 20 is attached to a table of, for example, a machine tool with a bolt using the attachment screw hole 43. When the slider 30 is moved in the axial direction by the operation of the mechanical table, the roller R in the load region existing between the upper raceway surface 22 of the guide rail 20 and the upper raceway surface 32 of the slider 30 is loaded by the movement of the slider 30. While supporting and rolling, move in the same direction. When it reaches one end of the slider body 30A, the end cap 30B
It is guided to the upper curved road 40 and its direction is changed, and a U-turn is made along the curved road 40. Subsequently, the slider body 30A passes through the upper roller return passage 38 to reach the end cap 30B on the opposite end side, and is similarly guided to the upper curved passage 40 to make another U-turn, and the upper track surface 22 of the guide rail 20 and the slider 30. Return to the upper raceway surface 32. Thus, the roller R repeats the endless circulation in which the roller R moves while rolling in the circulation path according to the movement of the slider 30.

In order to smoothly perform the above-described circulation operation of the roller R, the V-shaped concave portion 26 of the guide rail 20 and the slider 30 facing the concave portion 26.
It is necessary that the level of the V-shaped recess 36 and the level of the V-shaped recess 36 are precisely matched. Then, both V-shaped concave portions 26, 3 of this embodiment are
Six positions have been identified within tolerance. Further, both ends of the roller R in the load region are restrained by the upper roller guide collars 24, 34 of the V-shaped recesses 26, 36, and are prevented from moving in the axial direction. Therefore, the smooth operation of the roller R is guaranteed.

Further, since the V-shaped recesses 26, 27 and 36, 37 in the guide rail 20 and the slider 30 are all formed in an asymmetric V-shape, the height is lower than that in the symmetrical V-shape, and the device is Can be made compact.

Since the roller guide collars 24, 25 are formed by direct machining, there is no need to use a roller guide mounted with screws to prevent axial movement of the roller R as in the conventional example. Therefore, the number of parts can be reduced.

Moreover, in the conventional example, if the screw loosens due to vibration during use, the roller guide becomes loose, the constraint of the roller is loosened, and the rigidity is lowered, which may lead to deterioration of running accuracy due to the change in the attitude of the slider. In this embodiment, stable running accuracy can always be guaranteed.

FIG. 4 shows a modification of the guide rail 20. This is the upper part of the guide rail 20
Since the overhanging portion 21B having the same width as that of 21 is provided, the machining allowance of the side surface of the guide rail can be reduced, and the guide rail can be mounted stably.

5 and 6 show the second embodiment, in which the roller R having a hollow hole R _H is used. The weight of the rolling roller can be reduced, and the inertia of the rolling roller is small, resulting in excellent operability. Further, since the elastic deformation of the roller can be slightly large, the spring property of the roller R is large at the time of preloading, and there is an advantage that preload loss does not occur even if the roller or the raceway surface is slightly worn.

Further, two roller rows are provided on each side, but the present invention is not limited to this, and one row on one side or two or more rows on one side can be applied.

Further, although the contact angle direction lines la, lb are described as having the inclination angle of 45 °, the invention is not limited to this.

[Effect of device]

As described above, according to the present invention, one side edge portion of each raceway surface of the guide rail and the slider of the roller linear guide device has a width orthogonal to the raceway surface and narrower than the width of the raceway surface. Then, the roller guide flange which forms an asymmetric V-shaped groove inclined at the same gradient with respect to the horizontal direction is provided. Therefore, the positions of both the guide rail track surface and the slider track surface can be easily identified by a simple measuring method in which the probe is applied to the V-shaped recess formed by the roller guide collar and the track surface. Therefore, it is possible to obtain the effect that it is possible to provide a roller linear guide device having high accuracy and minimal measurement cost.

Further, since the asymmetric V-shaped groove is used, there is an effect that the device can be made compact.

Furthermore, when a hollow roller is used, it has excellent operability and can prevent preload loss during wear.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of the first embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a method for measuring the track position of a guide rail of the present invention. FIG. 4 is a sectional view of a modified example of the guide rail of the present invention, FIG. 5 is a sectional view of an essential part of the second embodiment, FIG. 6 is a sectional view taken along line VI-VI of FIG. 5, 7th
FIG. 1 is a sectional view of a main part showing an example of a conventional roller linear guide device. In the figure, 20 is a guide rail, 21 is a protruding portion, 22 is an upper raceway surface (of the rail), 23 is a lower raceway surface, 24 and 34 are upper roller guide flanges, 25 and 35 are lower roller guide flanges, and 30 is a slider, 32 is an upper raceway surface (of the slider), 33 is a lower raceway surface, 38 is an upper roller return passage, 39 is a lower roller return passage, 40 is an upper curved path, 41 is a lower curved path, and R is a roller.

Claims (1)

[Scope of utility model registration request] 1. A guide rail in which raceway surfaces are formed respectively on the slopes of protrusions that are trapezoidal overhanging from both side surfaces, and saddle-shaped guide rails that are movable in the axial direction across the guide rails. Between each slider having track surfaces facing the track surface and each having a roller return passage parallel to the track surface as a through hole in the wall thickness, between the track surface of the slider and the track surface of the guide rail. A roller linear guide device comprising a large number of cylindrical rollers arranged so as to be rollable, the guide rail and the slider being provided on one side edge portion of each raceway surface orthogonal to the raceway surface and of the raceway surface. An asymmetric V having a width narrower than the width and inclined at the same gradient with respect to the horizontal direction
A roller linear guide device provided with a roller guide flange that forms a V-shaped groove.