JPH0215336B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of manufacturing an improved roller guide for use in machine tools and the like that move in the axial direction.

[Prior art]

In the prior art, there exists a bearing device in which a single guide rail is provided with a plurality of raceway surfaces, and a bearing combined with the guide rail is also provided with a plurality of circulation paths to perform axial movement.

[Problem to be solved by the invention]

In the above conventional technology, the return section is covered with a plate-shaped lid from the top surface or left open due to the formation of the roller circulation path, so dustproofing and strength are insufficient, and the raceway surface is insufficient. This method has drawbacks such as the complicated manufacturing of the roller guide bearing that is fitted into the roller guide bearing.

[Means to solve the problem]

The present invention employs the following means in order to eliminate the drawbacks of the prior art as described above.

The shape of the guide rail to be attached to the fixed member is formed into an overhang or groove with a chevron-shaped or trapezoidal cross section, and the inclined surface of the overhang or groove is used as the raceway surface, and the movable member is provided with rollers at positions corresponding to the inclined surfaces of the guide rail. When installing a roller guide bearing that forms two circulation paths in which the rail moves endlessly, and constructing a roller guide consisting of a mating combination of this guide rail and a roller guide bearing, the end face of the roller guide bearing is made into a rectangular shape. By using a thick metal piece as a raw material, it can be easily adapted to the shape of the chevron or trapezoidal overhang or groove of the guide rail, and by leaving one side or corner of the rectangular metal piece as it is or cutting it. The circulation groove corresponding to the raceway surface of the guide rail and the machined surface of the raceway groove can be wood-cut, and the cover body of the roller circulation groove can be used as it is or with some processing, using a triangular prism produced by cutting the corner of a square metal piece. This is a method of manufacturing a roller guide that can save on processing and materials.

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

Embodiment 1 As shown in FIGS. 1 to 3, the guide rail G attached to the fixed member 1 has an isosceles triangular cross-sectional shape with an appropriate apex angle, and both slopes thereof are connected to the raceway surface G.
1, g2, and the mounting seat 3 for attaching to the side surface of the fixing member 1 is a roller guide bearing B.
It is provided with a sufficient distance so that it does not come into contact with it.

This guide rail G is attached to the side surface of the fixing member 1 by means of an appropriate means such as bolting, rather than being positioned symmetrically with the mounting seat 3.

Screw 1 for mounting on the moving member 2 and adjusting the mounting position
A pair of roller guide bearings B of the same shape to be mounted by 2 have square end faces, and one side of the thick hardware is provided with a groove portion extending over the entire width at an angle into which the guide rail G is fitted. The bearing body is formed into a shape in which both corners of a square metal piece are cut off parallel to the slope, and raceway grooves 4 are formed on both slopes of the groove at positions corresponding to both raceway surfaces g1 and g2 of the guide rail G. Circulating grooves 5, 5 corresponding to the raceway grooves are formed from the outside in parallel to the bottom surfaces of the raceway grooves 4, 4 on the cut surface of the bearing body at back-to-back positions.

A raceway surface 7 connecting the raceway grooves 4, 4 and the circulation grooves 5, 5 is provided by cutting on both end surfaces of the bearing body to form a curved surface that allows the roller guide to move easily. (In some cases, a separate piece may be attached to this raceway surface.) The lid body 10 that closes the circulation groove may be shaped like a triangular prism with both corners of the bearing body cut off, or may be slightly modified. used as

The end cap 8, which is attached to both end faces of the bearing body having the above configuration, has the same planar shape as the end face shape in which both corners of the bearing body are not cut off, and has a notch on one side that fits the guide rail G. It has a shape with raceway grooves 4 on the side in contact with the bearing body.
A groove 9 is formed to be combined with the raceway surface 7 which communicates the circulation groove 5 with the raceway surface 5. The groove 9 has a curved surface on which the roller can easily move, and together with the raceway surface 7 constitutes the communication path 6.

The end cap 8 having the above shape is fixed to both end surfaces of the bearing body with bolts or the like.
Both end surfaces of the 0 are held between the end caps, and these parts are fixed to the lid body from the end cap side using bolts or the like.

The endless circulation path composed of raceway grooves, circulation grooves, and communication paths is filled with a large number of rollers R, and each roller R has a pin portion on its axial surface.
A retainer 11 with a protruding portion R′ that locks the pin portion R′ to prevent it from falling from the raceway groove.
are attached to the raceway grooves by appropriate means such as screws.

In the figure, S indicates seals attached to both ends of the roller guide bearing B, which are attached to prevent dust and oil.

The roller guide bearing B is attached to the movable member 2 at a position corresponding to the guide rail G of the fixed member 1, and the roller guide bearing B is attached to the guide rail G and the roller guide bearing B.
are fitted together to form a roller guide for machine tools, etc., for axial movement of the moving member 2.

Therefore, compared to conventional roller guide devices, this roller guide is much superior in that it has increased rigidity because the two roller rows always share the load in the vertical and lateral directions.

In addition, if necessary, please attach the pins on both ends of the roller.
When the tip of R' is formed into a substantially semicircular shape, the frictional resistance of the roller movement due to the roller end face can be reduced.

Embodiment 2 This embodiment, as shown in FIG. The guide rail G is formed into a trapezoidal cross-section, unlike the one in which the fixing member 1 is attached.
A mounting surface G1 is formed on the top flat surface of the raceway surfaces g1 and g2 of both slopes, in which a bolt mounting hole can be drilled.

The structure of the roller guide bearing B fitted therewith is the same as that of the first embodiment.

This embodiment is more economical than the first embodiment because it does not require a mounting seat.

Embodiment 3 As shown in Fig. 5, this embodiment is a groove type guide rail instead of the extending type in the first and second embodiments, and the guide rails are directly attached to symmetrical positions on both sides of the fixing member 1. A guide rail G' having a chevron-shaped or trapezoidal cross-section (trapezoidal in the figure) is provided via a mount or a mounting base, and raceway grooves g1 and g2 are formed on both rising slopes of the groove of this guide rail G'.

A pair of roller guide bearings B' having the same shape and installed as a moving member 2 in correspondence with the guide rail G' are made of metal with a rectangular end face shape and an appropriate thickness, and the bearing bodies are made of appropriately thick metal parts, and are attached to the guide rail G' having a trapezoidal shape. In order to correspond to the guide rail G', a corner portion is cut off, and a raceway groove 24 is formed at a position corresponding to the raceway surfaces g1 and g2 of the guide rail G' on both slopes of this cut. The circulation groove 25,
In order to mold so that each bottom is located parallel,
Cut off the corner of the bearing body into a column with a square end face.
Circulating grooves 25 are formed on both sides of this cut.

Although the raceway grooves 24 and circulation grooves 25 are not shown, return is achieved by grooves in end caps attached to both ends of the bearing body and communication raceway surfaces formed across the raceway grooves and circulation grooves on both end faces of the bearing body. It connects to a connecting path that becomes a hall. (This structure is the same as the first embodiment, so the details are omitted.) Also, for the lid body 27 that covers the circulation groove 25, a cut piece of a square prism with the corners cut off is used as it is. Or use it by constructing a triangular prism that is bisected on the diagonal. (A triangular prism is used in the figure.) The shape of the end cap that holds the end face of the lid body is configured to have the same shape as the end face shape of the bearing main body formed as described above.

The roller R filled in the endless circulation path consisting of the raceway groove 24, the circulation groove 25, and the communication path 26 is
A pin portion R′ is protruding from both sides of the shaft center, and this pin portion
A retainer 28 that locks R' is fixed to the raceway groove 24 by appropriate means.

The features of the roller guide of this embodiment are the same as those of the first and second embodiments, but it is easy to process.

In the above embodiments, the guide rails are installed horizontally on both sides of the fixed member, but the guide rails are installed perpendicularly to the fixed member, and the roller guide bearings are fitted over the guide rails from above to prevent axial movement. Of course, it can also be used as a roller guide device.

〔Effect of the invention〕

As described above, the roller guide is formed into an overhang or groove with a chevron-shaped or trapezoidal cross-section, and both slopes are used as raceway surfaces.The bearing corresponding to this is also configured with two endless circulation paths, so that the roller can run endlessly. Since the rollers roll on both the front and back sides of the inclined track surface of the guide rail, the rigidity of the vertical load, lateral load, and moment load is lower than that of conventional ball rolling bearing devices. It is possible to increase the

Moreover, the bearing body attached to the moving member is
Since it can be mounted from the outside and can be moved by a small amount in the lateral direction using the screw for adjusting the mounting position, it can always be in a state without play or with a predetermined preload applied, so it is easier to move each bearing compared to conventional bearings. This makes it possible to obtain a roller guide that has high rigidity and load capacity against directional loads.

Furthermore, in terms of material removal, the roller guide bearing has a rectangular end face shape and is made of wood using thick hardware, so there is no need to provide a rectangular space for the bearing body as in conventional products, and the guide rail can be removed easily. Since it can be easily machined by cutting off one plane and a corner of the hardware in accordance with the angular shape of the raceway surface, it is extremely easy to machine the raceway grooves and circulation grooves in which the rollers circulate endlessly. During machining, the cut pieces can be used as they are, or after being slightly processed, for the cover of the circulation groove.Also, for hardware that is the raw material of the bearing body, the cut pieces can be used as the cover of the circulation groove on the cut-off surface. The rough material of the end cap, which is attached to both end faces of the bearing body, has a rectangular planar shape that is the same shape as the end face of the bearing body, in order to restore the original shape except for the part that is attached as a lid and fitted to the guide rail. It is convenient for material collection and machining work because it uses rough material and does not require any machining other than the part that fits into the guide rail and the groove part of the communication path. be.

As described above, the present invention is extremely rational in terms of saving materials and processing, and this point is an important element in the present invention.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway end view of the roller guide of the first embodiment, Fig. 2 is a top side view of the same, Fig. 3 is a sectional view taken along line A-A in Fig. 1, and Fig. 4 is a cross-sectional view of the roller guide of the second embodiment. 5 is a partially cutaway end view of the third embodiment, FIG. 6 is a reference diagram showing the cutting line of hardware B in the first embodiment, and FIG. 7 is a partially cutaway end view of the third embodiment. It is a reference figure which shows the cutting line of hardware B1. In addition, the symbols in the figure are 1...Fixed member, 2...Moving member, G...Guide rail, g1, g2...Raceway surface, 3...Mounting seat, B...Roller guide bearing,
4...Race groove, 5...Circulation groove, 6...Connection path, 7
... Raceway surface, 8 ... End cap, 9 ... Groove,
10... Lid body, R... Roller, R'... Pin part,
11...Retainer, G1...Mounting surface, 12...
Screws for mounting and adjusting the mounting position.

Claims (1)

[Scope of Claims] 1. A pair of guide rails whose raceway surfaces have both slopes having a chevron-shaped or trapezoidal cross-sectional shape are attached to a fixed member in symmetrical positions, and the guide rails are of the same shape and are fitted onto each of the guide rails. A pair of roller guide bearings is attached to the movable member using screws for mounting and adjusting the mounting position, and the roller guide bearing is constructed of a metal piece having a rectangular end face shape and an appropriate width, and one side of the metal piece has the above-mentioned guide A groove that matches the cross-sectional shape of the rail is formed over the entire width of the metal piece, and in order to obtain surfaces parallel to both slopes of the groove, both corners of the metal piece are cut off, and both slopes of the groove of the metal piece are formed. A raceway groove is formed at each position in contact with the raceway surface of the guide rail, and a circulation groove is formed on the cut-off surface formed parallel to the bottom surface of the raceway groove at a position facing each of the above-mentioned raceway grooves. For each circulation groove, a triangular prism-shaped cut piece created by the above cut is used as a lid body,
In addition, raceway surfaces connecting the corresponding raceway grooves and circulation grooves are provided by cutting on both end faces of the hardware, and the end caps that are attached to both end faces of the bearing body formed by these machining have a planar shape similar to that of the above hardware. It is a rectangular shape with the same shape, has the required thickness, and has one side cut off in the same shape as the groove of the bearing body, and the surface in contact with the bearing body has a groove that combines with the raceway surface molded on the end face of the bearing body. The end caps that form the communication path between the raceway groove and the circulation groove are fixed to both end faces of the bearing body, and the cover body of the circulation groove is clamped and fixed at both ends to the end cap, and the end cap that forms the communication path between the raceway groove and the circulation groove is fixed. A method for manufacturing a roller guide, characterized in that a circulation path consisting of endless grooves and communication paths is filled with rollers. 2. A guide rail consisting of a groove whose raceway surface has both slopes having a chevron-shaped or trapezoidal cross-section is attached to a pair of fixed members in a symmetrical position, and a pair of roller guide bearings of the same shape are fitted to the guide rail. is attached to the movable member using screws for mounting and adjusting the mounting position, and the roller bearing is composed of a metal piece having a rectangular end face shape and an appropriate width, and one corner of the metal piece is shaped to fit the groove of the guide rail. The cut-off surfaces are formed into slopes on both sides, and raceway grooves are formed at positions that contact the raceway surfaces of each guide rail.In order to obtain a surface parallel to the bottom surface of both raceway grooves, the above angles are Parallel surfaces are obtained by cutting off the diagonal corners of the cut pieces so that they become square prisms, a circulation groove is formed in the parallel surfaces, and the cut-off four pieces are used as covers for the circulation grooves. The bearing body is constructed by using a square prism as it is or a triangular prism in the form of a triangular prism divided into two diagonally, and further protruding from both ends of the hardware by cutting a connecting raceway surface of a raceway groove and a circulation groove formed back to back. The end caps attached to both ends of the bearing body have the same planar shape as the hardware of the bearing body, have the required thickness, and match the cross-sectional shape of the guide rail when the end caps are attached to the bearing body. It has a planar shape with a cutout on one corner, and a groove is formed on the surface that contacts the bearing body to be combined with the raceway surface for connecting the raceway groove and the circulation groove to form a communication path between the raceway groove and the circulation groove, End caps with this shape are fixed to both sides of the bearing body, the cover of the circulation groove is clamped and fixed to the end caps, and the endless circulation path consisting of the raceway groove, circulation groove, and communication path is filled with rollers. A method for manufacturing a roller guide characterized by: