JPH0623768Y2 - Linear motion guide bearing device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a machine tool used in fields such as steelmaking, papermaking, and aircraft manufacturing, a transport machine, a monorail, and the like, particularly a large machine for receiving vertical and horizontal forces. The present invention relates to an improvement of a linear motion guide bearing device that can be suitably used for devices.

[Conventional technology]

A conventional linear motion guide bearing device of this type is disclosed in, for example, Japanese Utility Model Publication No. 56-6649. This one is provided with an axially extending guide rail formed by subjecting a rail for rails to heat treatment, and a slider movably supported on the guide rail in the axial direction.

Further, concave grooves, which are ball rolling raceways, are formed on the upper, lower, left and right shoulders of the guide rail, respectively.

On the other hand, on the inner circumference of the slider, in order to infinitely circulate the loaded balls rolling in the raceway grooves of the guide rail, the loaded ball circulating grooves and the unloaded ball circulating grooves are alternately formed.

A large number of balls housed in the loaded ball circulation groove and the unloaded ball circulation groove are supported by a retainer attached to the inner circumference of the slider. The retainer is provided with a concave groove for supporting and guiding the unloaded ball moving in the unloaded ball circulation groove, and an elongated hole having a width smaller than the ball diameter and exposing a part of the ball. There is.

By arranging the balls in the vertical and horizontal directions, it is possible to support the load and moment load from the vertical and horizontal directions.

[Problems to be solved by the device]

However, in the above-mentioned conventional example, since balls are used for the rolling elements, there is a problem that a very large load cannot be received.

In addition, it is necessary to form a ball rolling raceway groove on a long rail, which results in a high cost.

Therefore, the present invention has been made by paying attention to the above-mentioned conventional problems, and the purpose thereof is to use rollers and rollers instead of balls, and to use a rail without grooves to load load capacity. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned conventional problems by providing a linear guide bearing device which is large in size and easy to process.

[Means for Solving the Problems]

In order to achieve the above object, the present invention comprises an axially extending guide rail formed by subjecting a rail for rails to heat treatment, and a slider movably suspended on the guide rail in the axial direction. In the linear guide bearing device, an upper surface of the guide rail, a side surface adjacent to the upper surface, and a lower surface adjacent to the side surface are track surfaces, and the upper surface track is located at a position facing the upper surface track surface of the inner surface of the slider. A roller circulation linear motion bearing having a row of rollers that endlessly circulates while rolling on a surface is attached, and an outer ring rolling on the side surface raceway is provided at a position facing the side surface raceway on the inner surface of the slider via a rolling element. A roller bearing fitted to a fixed inner ring is attached perpendicularly to the axis, and an outer ring rolling on the lower raceway surface is fitted to a stud via a rolling element at the lower end of the inner surface of the slider. Is installed diagonally And are characterized.

The roller circulation linear motion bearing can be attached to the inner surface of the slider via a self-aligning member.

[Action]

Roll over the top, side and bottom of the overhanging part of the rail top,
Since it is used as the rolling raceway surface of the roller, it is not necessary to specially process the concave groove or the like, and the cost is low. Moreover, since rollers and rollers are used instead of balls, the load-carrying capacity is larger than that of balls.

Further, the slider has rigidity with respect to the force from the upper side to the lower side, the force from the lateral direction, and the force from the lower side to the upper side, and the variation in the attitude of the slider is reduced. Therefore, there is no derailment, and running accuracy and stability are improved.

Further, by mounting the roller circulation linear motion bearing on the slider via the self-aligning member, the posture variation of the slider can be effectively prevented, and higher accuracy can be obtained.

〔Example〕

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

FIG. 1 is a cross-sectional view of the essential parts of one embodiment of the present invention.

A slider 2 having a substantially U-shaped cross section is laid over a guide rail 1 which is a rail for rails having a man-made cross section and extended in the axial direction.

The upper surface 1a of the guide rail 1 is a raceway surface that receives the main load from the upper side to the lower side of the slider 2. Both side surfaces 1b adjacent to the upper surface 1a are raceway surfaces that receive a load from the lateral direction of the slider 2. Furthermore, the side surface 1
The lower surface 1c adjacent to b is a raceway surface that receives a load from the lower side to the upper side of the slider 2.

On the other hand, on the inner surface side of the slider 2 facing the guide rail 1,
A recess 6 is formed. A roller circulating linear motion bearing 10 having two rows of cylindrical rollers 12 rolling on the guide rail upper surface 1a and infinitely circulating while rolling on the guide rail upper surface 1a is attached to a position of the recess 6 facing the guide rail upper surface 1a.

Details of the roller circulating linear motion bearing 10 are shown in FIGS. This has a main body 13 that supports a load through the two rows of cylindrical rollers 12, an end cap 14 that makes a U-turn of the cylindrical rollers 12 at both ends of the main body 13, and a side plate 15 that guides the cylindrical rollers 12. Since the cylindrical roller 12 rolls in the bearing and performs an endless circulation motion, linear guide can be performed without being restricted by the traveling distance. The structure is such that the mounting reference surface 16 provided on the side surface and the plate spring 17 are mounted and held in the recess 6 of the slider and do not fall off.

A fitting plate 18 for providing a self-centering function is attached to the upper surface of the main body 13 via a spring pin 19. The fitting plate 18 has a mounting hole 18a into which the spring pin 19 is inserted, and a projection 18b which extends downward in the axial direction. Since the mutual contact area between the mounting hole 18a and the spring pin 19 and the mutual contact area between the protrusion 18b and the upper surface of the circulating linear motion bearing 10 are set small, self-aligning property is provided by elastic contact. . This self-centering action applies a uniform load to each of the cylindrical rollers 12.

Also, at the bottom of both sleeves of the slider 2, the side surface 1 of the guide rail is
a mounting member 22 of the roller bearing 21 having b as a raceway surface,
A cantilever roller bearing 2 having the lower surface 1c of the guide rail as the raceway surface
3 and the attachment member 24 of 3 are attached by the bolt B1.

A recess 25 is formed on the inner side surface of the mounting member 22, that is, at a position facing the guide rail side surface 1b.
In the recess 25, the roller bearing 21 is mounted with its rotation axis vertical. As shown in FIG. 5, the roller bearing 21 has a needle roller 2 that is a rolling element on the outer periphery of a fixed inner ring 28 having a bolt insertion hole 27 in the shaft center.
A cylindrical outer ring 30 is fitted via 9 through. Inner ring 2
Ring-shaped side plates 31 are fitted to both axial end faces of the plate 8. 32 is an oil supply groove. Bolt insertion hole 2
The bolt B2 inserted through 7 is screwed into the screw hole 33 formed in the sleeve portion of the slider 2, and tightly tightened to fix the inner ring 28 so that the outer ring 30 rolls on the side surface 1b of the guide rail. It is positioned.

The attachment member 2 attached to the lower ends of both sleeves of the slider 2
The inner surface of 4 is an inclined surface 24a orthogonal to the inclined surface of the lower surface 1c of the guide rail, and the screw hole 3 is perpendicular to the inclined surface 24a.
4 are formed. Using the screw holes 34, the cantilever roller bearing 23 is attached to the inclined surface of the lower surface 1c of the guide rail in a state where its axis is inclined.

As shown in FIG. 6, the cantilever roller bearing 23 has a male screw 35 at the tip, a driver groove 36 at the head, and an oil supply hole 37 at the center.
A cylindrical outer ring 40 is fitted on the outer peripheral surface of the stud 38 having a roller via a needle roller 39 which is a rolling element. The outer ring 40 is formed by the head disk 38a of the stud 38.
And the fixing ring 4 fixed to the intermediate step portion of the stud 38.
It is locked by 1 and. And the stud 38
The male screw 35 of the screw hole 3 of the inclined surface 24a of the mounting member 24
The outer ring 40 is positioned so as to roll on the lower surface 1c of the guide rail.

Reference numeral 42 is a mounting hole for fixing the guide rail 1 to the base, and 43 is a bolt screw hole for mounting the transported object on the slider 2.

Next, the operation will be described.

In this linear motion guide bearing device, since it can be used as a guide rail without machining an existing rail for railroad, it is inexpensive, and the slider 2 is assembled using the existing rail equipment. Law is also possible.

Further, since the main load applied to the guide rail 1 from the upper side to the lower side of the slider 2 is supported by the guide rail 1 via the cylindrical roller 12 of the roller circulating linear motion bearing 10, the main load is larger than that of the ball. Is obtained and a long life can be expected.

Further, since the slider 2 incorporating the roller circulation linear motion bearing 10, the roller bearing 21, and the cantilever roller bearing 23 is integrally combined with the guide rail 1 to form a unit, there is no need to assemble it on site. It is sufficient to simply fix the guide rail 1 and bolt the transported object to the slider 2, and it is easy to handle and the assembling accuracy is guaranteed.

When the slider 2 to which the transported object is attached moves in the axial direction,
The cylindrical roller 12 of the roller circulating linear motion bearing 10 rolls on the upper raceway surface 1a of the guide rail 1 and infinitely circulates. The load applied to the slider 2 from the upper side to the lower side is supported by the guide rail through the large roller circulating linear motion bearing 10.

Further, since the roller bearing 21 and the cantilever roller bearing 23 embrace the side surface of the guide rail 1 and the raceway surface of the lower surface, there is no risk of the slider 2 falling off the guide rail 1, and further, the rolling, yawing, Pitching etc. are prevented and running accuracy and stability are guaranteed.

Further, the cantilever roller bearing 23 cooperates with the fitting plate 18 having a self-centering action to absorb the mounting error.

FIG. 7 shows a second embodiment.

This embodiment differs from the first embodiment in that the outer surfaces of the outer ring 30A of the roller bearing 21 and the outer ring 40A of the cantilever roller bearing 23 are spherical rather than cylindrical. This has the advantage that the alignment is further improved.

Other configurations and operational effects are similar to the above.

[Effect of device]

As described above, according to the present invention, on the inner surface of the slider in the linear guide bearing device in which the slider is movably supported in the axial direction on the guide rail using the rail for rail,
A roller circulating linear motion bearing that receives a main load, a roller bearing that receives a lateral load, and a cantilever roller bearing that receives a load from below are arranged. The roller is configured to roll. for that reason,
The guide rail does not need to be specially processed to have a groove or the like, the cost is low, the load-carrying capacity is large, and it is suitable as a heavy load carrier, and the posture variation of the slider is suppressed, and running accuracy and stability are improved. It is possible to provide the linear guide bearing device that is guaranteed and can prevent the risk of falling out.

Further, by mounting the roller circulation linear motion bearing on the slider through the self-aligning member, it is possible to effectively prevent the attitude variation of the slider and to provide a linear motion guide bearing device with higher accuracy.

[Brief description of drawings]

FIG. 1 is a front view showing a half section of a first embodiment of the present invention, FIG. 2 is a perspective view of a roller circulation linear motion bearing, and FIG.
FIG. 4 is a side view, FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 3, FIG. 5 is a perspective view showing a part of a roller bearing with a part cut away, and FIG. FIG. 7 is a front view showing a half section of the second embodiment. In the figure, 1 is a guide rail, 2 is a slider, 10 is a roller circulation linear motion bearing, 12 is a cylindrical roller, 18 is a self-aligning member, 2
1 is a roller bearing, 23 is a cantilever roller bearing, 29 and 39 are rolling elements, 30 and 30A are outer rings, 38 is a stud, 40,
40A is an outer ring.

Claims (2)

[Scope of utility model registration request] 1. A linear motion guide bearing device comprising an axially extending guide rail formed by heat-treating a rail for rail and a slider movably mounted on the guide rail in the axial direction. An upper surface of the guide rail, a side surface adjacent to the upper surface, and a lower surface adjacent to the side surface as raceway surfaces, and rolling the upper surface raceway surface to a position facing the upper surface raceway surface of the inner surface of the slider. A roller circulating linear motion bearing having infinitely circulating roller rows is mounted, and an outer ring rolling on the side surface raceway is fitted to the inner ring at a position facing the side surface raceway on the inner surface of the slider. And a cantilever roller bearing in which an outer ring rolling on the lower raceway surface is fitted to a stud via a rolling element is obliquely attached to the lower end of the inner surface of the slider. Linear motion guide bearing characterized by apparatus. 2. The linear guide bearing device according to claim 1, wherein the roller circulation linear motion bearing is mounted on the inner surface of the slider via a self-aligning member.