JPH09273550A - Linear moving block and linear moving guide rail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a cost, temporal deterioration, generation of noises and frictional heat, and prevent occurrence of contamination. SOLUTION: A linear moving block 11 has substantially rectangular parallelopiped shape, formed with a groove 115 on each side surface extending in a longitudinal direction, while an engagement contacting projection member 13 is fitted and fixed to the groove. A groove 114 is formed on a bottom surface of the linear moving block 11, while a surface contacting projection member 12 is fitted and fixed thereto. V-shaped grooves 147 and 148 are formed on inner sides of the side surfaces of a linear moving guide rail 14. The engagement contacting projection member 13 is engaged with the V-shaped grooves 147 and 148 of the linear moving guide rail, engaged therewith and performs linear motion. The surface contacting projection member 12 runs with a slight gap from an upper surface of a bottom 141 of the linear moving guide rail 14 normally. When large load is applied to the linear moving block 11 in a vertical direction, the surface contacting projection member 12 is in contact with the upper surface of the bottom 141 of the linear moving guide rail, and runs while supporting the load.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear motion guide rail and linear motion blocks which are guided by the linear motion guide rails and linearly move.

The linear motion guide rail and the linear motion block according to the present invention can be divided into the following two types. That is, firstly, the linear motion guide rail is a long member having a substantially rectangular cross section, and the linear motion block has an inverted U-shaped cross section. They are so-called LM linear guide rails and LM linear blocks that straddle and travel straight in the longitudinal direction. Second, the linear guide rail is a long member having an inverted U-shaped cross section.
The linear motion block is a substantially rectangular parallelepiped, and the linear motion block is a so-called KR linear guide rail and KR linear motion block that fits in the linear motion guide rail and travels straight in the longitudinal direction.

[0003]

2. Description of the Related Art FIG. 15 is a perspective view including a partial cross section of a conventional LM linear motion guide rail and LM linear motion block. FIG. 16 is a sectional view of a conventional LM linear motion block.

The LM linear motion block 1 has an inverted U-shaped cross section, and has side portions 102 and 103 extending rightward and downward from the left and right ends of the upper portion 101, respectively.

A ball bearing running groove 161 having a semicircular cross section is formed at the inner corner of the boundary between the upper part 101 and the left side part 102, and the LM linear motion block 1 in the upper left direction of the ball bearing running groove 161 is formed. A circular ball bearing running hole 165 is bored inside, and both ends (not shown) of the ball bearing running groove 161 are connected to both ends (not shown) of the ball bearing running hole 165, respectively, so that the ball bearing runs. It forms a circulation path. Similarly, a ball bearing running groove 163 is formed at the inner corner of the boundary between the upper part 101 and the right side part 103, and a ball bearing running hole 167 is bored inside in the upper right direction.

A ball bearing running groove 162 having a semicircular cross section is formed at an inner corner of a boundary between the jaw 108 and the side 102 below the left side 102. A circular ball bearing running hole 166 is bored inside the lower left direction. Both ends (not shown) of the ball bearing running groove 162 are connected to both ends (not shown) of the ball bearing running hole 166, respectively, and form a circulation path along which the ball bearing runs. Similarly, a ball bearing running groove 164 is formed in the inner corner of the boundary between the right side portion 103 and the jaw portion 109, and a ball bearing running hole 168 is formed in the lower right direction inside.

[0007] Before and after the LM linear motion block,
An end block 20 internally formed with a return path connecting the ball bearing running groove and the ball bearing running hole.
Is arranged. The ball bearing running groove, the ball bearing running hole, and the return path are lined with a large number of ball bearings 22 with almost no space therebetween so as to press each other and circulate. A dust blocking plate 21 made of a flexible material such as rubber or plastics is arranged on the surface of the end block 20, and is screwed to the LM linear motion block 1 together with the end block 20. Garbage protection plate 2
1 prevents dust from entering between the LM linear motion block 1 and the LM linear motion guide rail 2.

On the other hand, the LM linear guide rail 2 has a substantially rectangular cross section, and a constriction is continuously formed at the center of the left and right side surfaces. And, on the boundary between the upper surface and the left and right side,
Ball bearing running grooves 205 and 20 having a semicircular cross section
7 are continuously formed. Further, ball bearing running grooves 206 and 208 having a semicircular cross section are continuously formed in the upper jaw.

As shown in FIG. 15, the LM linear motion block 1 straddles both side surfaces and the upper surface of the LM linear motion guide rail 2 and linearly moves in the longitudinal direction via a ball bearing 22. The LM linear motion block 1 and the LM linear motion guide rail 2 slide through the ball bearing 22 without making contact with each other.

On the other hand, the conventional KR linear motion block and KR linear motion guide rail are the same as the conventional LM linear motion block and L described above.
Although the shape is different from that of the M linear motion guide rail, they are common in that they linearly move in the longitudinal direction with each other through a number of circulating ball bearings.

[0011]

However, a large number of ball bearings are interposed between the linear motion block and the linear motion guide rail in the related art, and they are pressed against each other while rolling to travel and circulate. The bearing running hole and the return path must be precisely drilled in the linear motion block, and after the machining, the ball bearing must be circulated for a predetermined period of time so that the ball bearing and its circulation path are aligned. There is a problem that the cost of the moving block is high. Secondly, due to the inclusion of a small amount of dust, the occurrence of rust, the occurrence of damage or abrasion, the ball bearing may become stuck and smoothly circulate, or play may occur. There is a problem that deterioration easily occurs. Third, there is a problem that noise is generated as the ball bearing travels. Fourth, there is a problem that when the ball bearing runs continuously, heat of abrasion is generated and the temperature rises in a short time. Fifth, when the ball bearing runs, there is a problem that metal powder is generated due to abrasion and the linear motion guide rail becomes dirty. Further, there is a problem that the allowable dimensional range of the linear motion block, the linear motion guide rail, and the ball bearing and the assembly clearance range thereof are extremely narrow, the occurrence rate of assembly failure is high, and the yield is poor.

Therefore, the present invention solves the above problems,
An object of the present invention is to provide a linear motion block and a linear motion guide rail that do not generate noise, generate almost no heat, and are inexpensive.

[0013]

According to a first aspect of the present invention, there is provided a linear motion guide rail and linear motion guide rail according to claim 1, wherein the linear motion guide rail has a substantially rectangular cross section and both sides of the linear motion guide rail. A linear motion block having a substantially U-shaped cross section, the linear motion block straddling a surface and an upper surface and traveling in a straight line in the longitudinal direction, the linear motion block having an upper part and left and right side parts extending downward at right angles from both ends of the upper part. A surface contact protrusion is formed on the inner surface of the upper part of the moving block, the surface of the surface contact protrusion and the upper surface of the linear guide rail are in surface contact, and the engaging contact protrusions are formed on the inner surfaces of the left and right side portions. Formed to extend in the straight running direction, and
On the left and right side surfaces of the linear motion guide rail, guide grooves into which the tips of the engaging contact protrusions of the linear motion block fit are formed so as to extend in the longitudinal direction, and the engaging contact protrusions of the linear motion block are formed. And the guide groove of the linear motion guide rail engages with each other.

According to a second aspect of the linear motion block and linear motion guide rail of the present invention, an elongated linear motion guide rail having a substantially rectangular cross section and straddling both side surfaces and an upper surface of the linear motion guide rail, A linear motion block that travels in a straight line in the longitudinal direction and that is composed of an upper part and left and right side parts that extend downward at right angles from both ends of the upper part, and has a substantially U-shaped cross section.
A surface contact protrusion is formed on the upper surface of the linear motion guide rail, the surface of the surface contact protrusion and the inner surface of the upper portion of the linear motion block make surface contact, and the engaging contact protrusions on the inner surfaces of the left and right side portions. Are formed so as to extend in the straight running direction, and guide grooves into which the tips of the engaging contact protrusions of the linear motion blocks fit are formed on the left and right side surfaces of the linear motion guide rail so as to extend in the longitudinal direction. The linear contact block of the linear motion block is engaged with the guide groove of the linear motion guide rail.

According to a third aspect of the linear motion block and linear motion guide rail of the present invention, the surface contact protrusion and the engaging contact protrusion are carbon fiber-containing resin, ceramic, metal powder-dispersed ceramic or sintered bond. It is made in.

According to a fourth aspect of the linear motion block and linear motion guide rail of the present invention, the cross-sectional shape of the tip of the engaging contact protrusion is semicircular, quadrangular or V-shaped.

In the linear motion block and the linear motion guide rail of the present invention according to claim 5, the engaging contact protrusions are formed only at the inlet and the outlet of the linear motion block, and the engaging contact protrusions are provided in the middle. There is no relief part.

The linear motion block and the linear motion guide rail of the present invention according to claim 6 are substantially U-shaped in cross section, and each has a bottom part and left and right side parts extending upward at right angles from both ends of the bottom part. Of a long linear motion guide rail and a linear motion block fitted in the linear motion guide rail and traveling linearly in the longitudinal direction and having a substantially rectangular cross section, and a surface contact protrusion on the bottom surface of the linear motion block. And the sliding surface of the surface contact protrusion and the inner surface of the bottom of the linear motion guide rail are in surface contact, and the engaging contact protrusions are formed on the left and right side surfaces so as to extend in the straight traveling direction, A guide groove into which the tip of the engaging contact protrusion of the linear motion block fits is formed on the inner surfaces of the left and right side portions of the linear motion guide rail so as to extend in the longitudinal direction. The tip of the engaging contact protrusion and the guide groove of the linear guide rail engage with each other.

The linear motion block and the linear motion guide rail of the present invention according to claim 7 are substantially U-shaped in cross section, which is composed of a bottom portion and left and right side portions extending at right angles upward from both ends of the bottom portion. A long linear motion guide rail, and a linear motion block that fits inside the linear motion guide rail and travels linearly in the longitudinal direction and has a substantially rectangular cross section, and has a surface on the inner surface of the bottom of the linear motion guide rail. A contact protrusion is formed, the sliding surface of the surface contact protrusion and the bottom surface of the linear motion block are in surface contact, and engaging contact protrusions are formed on the left and right side surfaces so as to extend in the straight traveling direction, A guide groove into which the tip of the engaging contact protrusion of the linear motion block fits is formed on the inner surfaces of the left and right side portions of the linear motion guide rail so as to extend in the longitudinal direction. The tip of the engaging contact protrusion and the guide groove of the linear guide rail engage with each other.

The linear motion block and the linear motion guide rail of the present invention according to claim 8 are characterized in that the surface contact protrusion and the engaging contact protrusion are carbon fiber-containing resin, ceramic, metal powder-dispersed ceramic or sintered bond. It is made in.

According to the ninth aspect of the linear motion block and linear motion guide rail of the present invention, the cross-sectional shape of the tip of the engaging contact protrusion is semicircular, quadrangular or V-shaped.

According to a tenth aspect of the linear motion block and linear motion guide rail of the present invention, the engaging contact protrusions are formed only at the inlet and outlet of the linear motion block, and the engaging contact protrusions are formed in the middle. There is no relief part.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Various embodiments of a linear motion block and a linear motion guide rail according to the present invention will be described below with reference to the accompanying drawings.

First Embodiment FIG. 1 is a perspective view of a linear motion block of the first embodiment.
In the linear motion block 1 of the first embodiment, the cross section is approximately inverted U.
It is in the shape of, and from the left and right ends of the upper part 101
Sides 102 and 103 extend downward at a right angle. Top 1
Four screw holes 104 are threaded at intervals on the upper surface of 01, and the mount base plate and the like can be screwed and fixed in close contact with the upper surface of the upper portion 101.
A surface contact protrusion 3 is formed on the lower surface of the upper portion 101. In the first embodiment, the surface contact protrusion 3 has a rectangular cross section, and continuously extends in the longitudinal direction of the linear motion unit 1 (direction from upper right to lower left in FIG. 1). Therefore, the contact surface 301 which is the lower surface of the surface contact protrusion 3 is a rectangle extending in the longitudinal direction. On the other hand, an engaging contact protrusion 4 having a triangular cross section continuously extends in the longitudinal direction of the linear motion block 1 on the inner surface of the left side portion in FIG. Similarly, the engaging contact protrusion 5 is also formed inside the right side portion 103. In the linear motion block 1 of the first embodiment, the surface contact protrusion 3 and the engagement contact protrusions 4 and 5 are integrally formed, and extend continuously in the longitudinal direction. As a material, carbon fiber, dispersed resin, resin, ceramics, copper alloy such as gunmetal, sintered bond gold or cemented carbide can be used. For the purpose of lubrication and rust prevention, copper alloy, sinter-bonded gold or cemented carbide is so-called boiling treatment by immersing Millitech manufactured by Nippon Earth Tech Co., Ltd. at 80 to 95 ° C for 5 minutes to 1 hour. Is preferably performed.

Second Embodiment FIG. 2 is a perspective view of a linear guide rail of a second embodiment. The linear guide rail 2 is a long member having a substantially rectangular cross section. Through hole 20 penetrating from the upper surface 201 to the lower surface
4 are formed in two rows at intervals. Through-hole 204
It may be a blind hole or a screw hole, and a screw (not shown) is passed through the through hole 204 and screwed into a screw hole of a base (not shown) to fix the linear guide rail 2 to the base. It is a thing. Side surfaces 202 and 203 of the linear guide rail 2
Each has a V-shaped groove 6 near the center in the vertical direction.
And 7 are provided so as to extend linearly continuously in the longitudinal direction. As the material of the linear guide rail of the second embodiment,
A heat-treated material of SKS steel, stainless steel, sintered gold, ceramics, or the like can be used. For the purpose of lubrication and rust prevention, SKS steel, stainless steel, or sinter-bonded gold is subjected to so-called boiling treatment by heating Miltec made by Nippon Earth Tech Co., Ltd. at 80 to 95 ° C and immersing for 5 minutes to 1 hour. preferable.

When the engaging contact protrusions 4 and 5 of the linear motion block 1 according to the first embodiment are fitted in the grooves 209 and 210 of the linear motion guide rail 2, respectively, the linear motion block 1 of the linear motion block 1 is not loaded. The linear motion block 1 linearly slides along the linear motion guide rail 2 while forming a gap of 0.5 to 5 μm between the contact surface 301 of the surface contact protrusion 3 and the upper surface of the linear motion guide rail 2. When loaded on the linear motion block 1 or when a vertical force is applied, the engaging contact protrusions 4 or 5 or the groove 2
09 or 210 is deformed or the engagement gap between them is narrowed, the linear motion block 1 sinks downward, but when it sinks to a certain extent, the contact surface 301 comes into contact with the upper surface 201 of the linear motion guide rail 2 and a load is applied. Since the linear motion block 1 is supported, the subduction of the linear motion block 1 does not proceed any further. Therefore, the linear motion block and linear motion guide rail of the present invention can withstand a heavy load or impact force, and the design accuracy can be maintained.

Third Embodiment FIG. 3 is a front view of a linear motion block according to a third embodiment.
The linear motion block 1 of the third embodiment has an approximately inverted U-shaped cross section, and from the left and right ends of the upper portion 101,
Sides 102 and 103 extend downward at a right angle. Top 1
In the center of the lower surface of 01 and the center of the inner surfaces of the side portions 102 and 103, anchor grooves 105 each having a width that widens from the entrance to the back are formed. Screw holes (not shown) are threaded on the upper surface of the upper portion 101 at intervals of two rows, and the mount base plate and the like can be screwed and fixed in close contact with the upper surface of the upper portion 101. The upper part 101 and the side parts 102 and 103 are integrally manufactured from a heat-treated material of SKS steel, stainless steel, or the like. Then, after precisely aligning the integrated upper part 101, the side parts 102 and 103 in the injection molding die, the heat-melted resin, the carbon fiber dispersed resin or the metal powder dispersed resin is injected under pressure, The inner surface coating resin layer 6 is precisely formed. In the inner surface coating resin layer 6, a surface contact protrusion 601 having a rectangular cross section and protruding downward is formed below the upper surface 101 of the linear motion block according to the third embodiment. Is formed with an engaging contact protrusion 602 having a semicircular cross section and protruding rightward, and an engaging contact protrusion 603 is similarly formed on the left side of the right side portion 103. Surface contact protrusion 601, engagement contact protrusions 602 and 6
Each of 03 extends in a continuous straight line in the longitudinal direction of the linear motion block.

The linear motion block 1 of the third embodiment is shown in FIG.
Regarding the linear guide rail 2 of the second embodiment shown in
By combining the grooves 209 and 210 with a modified semi-circular cross-sectional shape, the engaging contact protrusions 602 and 603 of the linear motion block 1 are respectively formed in the linear motion guide rails 2.
The linear motion block 1 is fitted and engaged in the grooves 209 and 210 of
Is guided and linearly slides without falling off from the linear guide rail 2.

Fourth Embodiment FIG. 4 is a front view of a linear motion block of a fourth embodiment.
The upper part 101 and the side parts 102 and 103 are integrally manufactured from a heat-treated material of SKS steel, stainless steel, or the like.

A rectangular parallelepiped groove 106 having a wide cross section is formed in the left and right center of the lower surface of the upper portion 101. This groove 106
A plate-shaped member 7 is fitted in the and protrudes downward. The plate-shaped member 7 serves as a surface contact protrusion, and the lower surface of the plate-shaped member 7 is the contact surface 701. As a material of the plate-shaped member 7, a resin, a carbon fiber-dispersed resin, a metal powder-dispersed resin, ceramics, a copper alloy such as gunmetal, a sintered bond metal, or a cemented carbide can be used. As the copper alloy, sintered gold or cemented carbide, it is preferable to use what has been subjected to so-called boiling treatment using Millitech as described above.

FIGS. 5, 6 and 7 are perspective views of the engaging contact protruding member of the embodiment, respectively. Each of the engaging contact projecting members comprises a holder 8 having a U-shaped cross section, and a sliding element 9 having a base portion housed in the holder 8 and projecting an engaging contact projecting portion 901. The sliding element 9 of the engaging contact projection member of the embodiment shown in FIG. 5 has a triangular cross section,
The length in the longitudinal direction is about 3 of the longitudinal length of the linear motion block.
It's a fraction.

FIG. 8 is a cross-sectional view of the linear motion block of the embodiment incorporating the engagement contact member shown in FIG. 5, and is a view showing the AA cross section in FIG. The groove 106 is formed from the entrance of the linear motion block up to about one-third of the length in the longitudinal direction. A part of the groove 106 is fitted into the groove 106, and the plate-like member 7 projecting the other part downward is fixed. There is. Similarly, a groove 106 having a length of about one-third is formed near the outlet of the linear motion block, and the plate-shaped member 7 projects into the groove 106 and is fitted therein.

The groove 107 on the side portion 102 is also about 1/3 of the length.
A part of the engaging contact member is housed and fitted therein, and the other part projects inward from the inner surface of the side part 102.

Therefore, in the linear motion block of the embodiment shown in FIG. 8, there is no surface contact protrusion and no engagement contact protrusion at the center in the longitudinal direction, and there is no contact with the linear guide rail. According to the linear motion block of this embodiment, since the escape portion that does not contact the linear motion guide rail is formed at the center, it is difficult for dust and the like to enter between the engaging contact protrusion and the groove of the linear motion guide rail. There is an effect that scratches are less likely to attach to these parts, and although the assembly rigidity is reduced due to the ratio of the relief portion and the contact portion, sliding resistance is reduced,
There is an effect that it can be slid lightly.

In the engaging contact protrusion member shown in FIG. 6, the sliding element 9 is provided with flat cuts 902 and 801 which are perpendicular to the longitudinal direction.
It is formed so as to extend from the tip of the engaging contact protrusion 901 to the end of the holder 8 on the open side. An oil-impregnated alloy or an oil-impregnated resin can be fitted into the cuts 902 and 801. In this case, the step may be eliminated from the surface of the engaging contact protrusion 901, or the clearance may be provided by lowering it by about 1 μm from the surface of the engaging contact protrusion 901.

If the engaging contact protruding member shown in FIG. 6 is used, a lubrication failure does not occur even if it continuously slides without refueling.

In the engaging contact protruding member shown in FIG. 7, a meandering groove 903 is carved on the surface of the engaging contact protruding portion 901. Since the lubricating oil can move along the meandering groove 903, it is possible to supply the lubricating oil substantially uniformly over the entire surface of the engaging contact protrusion 901. Further, even if dust or abrasion powder is generated, it is discharged to the outside through the meandering groove.

It is preferable to use carbon fiber-dispersed resin, resin, ceramic or the like as the material of the engaging contact protruding member shown in FIGS. 5, 6 and 7.

Next, embodiments of the KR linear motion block and the KR linear motion guide rail will be described with reference to the accompanying drawings.

Fifth Embodiment FIG. 9 is a perspective view of a KR linear motion block of a fifth embodiment. The KR linear motion block 11 is approximately a rectangular parallelepiped, and a screw hole 116 for screwing and fixing a mount base or the like is cut on the upper surface. Grooves 115 extending in the longitudinal direction are formed in the vertical center of the side surfaces 112 and 113, respectively. The engaging contact projecting member 13 is fitted into the groove 115 and is fixed by adhesion with an adhesive. The base of the engaging contact projecting member 13 is shaped to fit into the groove 115 without any clearance, and the tip of the engaging contact projecting member 13 has a triangular cross section. A groove 114 is dug in the center of the bottom surface 111 in the left-right direction and extends in the longitudinal direction. Groove 11
A surface-contact protruding member 12 is fitted in 4 and is adhered and fixed by an adhesive or the like.

As the material of the engaging contact protruding member 13 and the surface contact protruding member 12, carbon fiber dispersed resin, metal powder dispersed resin, ordinary resin, ceramics, sintered bond gold or gun metal can be used. As mentioned above, Millitech made by Nippon Earth Tech Co., Ltd.
It is preferable to perform so-called boiling treatment by heating at 95 ° C. and immersing for 5 minutes to 1 hour.

Sixth Embodiment FIG. 10 is a perspective view of a KR linear motion block of a sixth embodiment. The difference from the KR linear motion block of the fifth embodiment is that the engaging contact projecting members 13 are short in the longitudinal direction, a total of four are used, and they are bonded and fixed to both ends of the groove 115 and the KR linear motion block. A point is that a circular through hole 117 extending in the longitudinal direction is formed at the center of the block 11, and an internal thread portion 17 having an internal thread is fitted inside and adhered therein. Sixth
The KR linear motion block 11 of the embodiment is driven in the longitudinal direction of the feed screw shaft when the feed screw shaft (not shown) and the female screw portion 17 are screwed and the feed screw shaft is rotated in the forward and reverse directions.

Seventh Embodiment FIG. 11 is a perspective view of a KR linear guide rail of a seventh embodiment. The KR linear motion guide rail 14 is a long member having a U-shaped cross section. It has side portions 142 and 143 extending upward from the right and left ends of the bottom portion 141 at right angles. Near the centers of the inner surfaces 145 and 146 of the side portions 142 and 143 in the vertical direction, V-shaped grooves 147 and 1 are formed, respectively.
48 is formed and extends in a continuous straight line in the longitudinal direction.
The KR linear motion guide rail 14 of the seventh embodiment is manufactured from a heat-treated material of SKS steel, stainless steel, ceramics, etc., and similarly to the above, the heat-treated material of SKS steel and stainless steel are manufactured by Nippon Earthtech Co., Ltd. 80 of Militec
It is preferable to perform so-called boiling treatment by heating to ˜95 ° C. and immersing for 5 minutes to 1 hour.

By combining the linear motion block of the fifth embodiment and the linear motion guide rail of the seventh embodiment, a linear driven system can be obtained. The tips of the engaging contact projecting members 13 of the linear motion block 11 have grooves 147 and 14 of the linear motion guide rail 14.
8, the linear motion block 11 linearly slides along the linear motion guide rail 14. At that time, the linear motion block 11
Surface contact protruding member 12 fitted and fixed to the bottom surface 111 of the
Moves with a gap of 1 to 10 μm from the upper surface 144 of the bottom portion 141 of the linear motion guide rail 14, but when a load is applied to the linear motion block 11 or an impact force is applied, the linear motion block 11 sinks, Since the surface contact protrusion member 12 contacts the bottom portion 141 of the linear guide rail 14 to support the load, it does not sink further. In this way, when the load is not applied, the friction resistance is reduced, and when the load is applied, the rigidity is increased.

Further, the linear motion block of the sixth embodiment and the linear motion guide rail of the seventh embodiment are combined, and a feed screw shaft (not shown) extending in the longitudinal direction at the center of the linear motion guide rail is rotatable. And a motor (not shown) that rotates the lead screw shaft is installed to obtain a linear drive system. In the linear motion block of the sixth embodiment, the engagement contact projecting member 13 is fitted and fixed near the inlet and near the outlet, and the escape portion is formed in the middle, so that the frictional resistance is small and sliding is possible. In addition, it is possible to easily and automatically discharge dust and the like mixed between the engaging contact protruding member 13 and the grooves 147 and 148.

Eighth Embodiment FIG. 12 is a perspective view of a linear motion block of the eighth embodiment. The difference from the linear motion block of the fifth embodiment shown in FIG. 9 is that in the eighth embodiment, there is no surface contact protruding member on the bottom surface 111.

Ninth Embodiment FIG. 13 is a perspective view of a linear guide rail of a ninth embodiment. The difference from the linear motion guide rail of the seventh embodiment shown in FIG. 11 is that in the ninth embodiment, the bottom portion 14
A groove 149 is formed in the center of the upper surface 144 of the No. 1 in the left-right direction, extends in the longitudinal direction of the linear guide rail, and the surface contact protruding member 16 is fitted and fixed in the groove.

In order to screw and fix the linear guide rails of the seventh and ninth embodiments to the base, the linear guide rail is penetrated in both sides of the bottom portion 141 of the linear guide rail which the surface contact protruding member does not contact. A hole may be provided, or when the linear guide rail has a narrow width and a short length, only the bottom portion may be extended in the longitudinal direction and a through hole may be provided in the extension portion.

Further, the sectional shape of the engaging contact protruding member may be a semicircle or a quadrangle other than the triangle.

Tenth Embodiment FIG. 16 is an assembly diagram of a KR linear motion block of a tenth embodiment. The KR linear motion block 11 is approximately a rectangular parallelepiped, and screw holes 116 for screwing and fixing a mount base and the like are cut near the four corners on the upper surface. Notches 119 extending vertically are formed at the four corners of the KR linear motion block 11. V-grooves 118 extending in the longitudinal direction from the edges of the notch 119 to the edges of the notch 119 are precisely formed in the vertical center of the side surfaces 112 and 113, respectively. The angle formed by the two planes of the V groove 118 is 90 °. Then, the rectangular parallelepiped members 18 are closely attached to the notches 119 at the four corners, respectively. As a method of attaching the rectangular parallelepiped member 18, adhesion, screwing, or the like can be used.

On the other hand, the square columnar engagement contact protruding member 15
Two are prepared. The assembly surface 152 of the engaging contact protruding member 15 closely contacts the groove surface of the V groove 118 without any clearance.
The sliding surface 151 of the engaging contact protruding member 15 projects from the side surfaces 112 and 113 of the KR linear motion block 11.

As the material of the engaging contact protruding member 15, carbon fiber dispersed resin, metal powder dispersed resin, ordinary resin, ceramics, sintered bond gold or gun metal can be used.

Eleventh Embodiment FIG. 17 is a perspective view of an engaging contact protruding member of an eleventh embodiment. The engaging contact protruding member 15 has a substantially square columnar shape. However, the sliding surface of the engaging contact protruding member 15 is
In the embodiment of FIG.
In the first embodiment, the disk-shaped projections 153 are arranged in a staggered pattern on the surface.

Also in the eleventh embodiment, the material of the engaging contact projecting member 15 is carbon fiber-dispersed resin, metal powder-dispersed resin, ordinary resin, ceramics, sintered bond metal or gun metal.

Twelfth Embodiment FIG. 18 is a perspective view of an engaging contact projecting member of a twelfth embodiment. The engaging contact protruding member 15 has a substantially square columnar shape. However, the engaging contact projecting member 15 is formed with three grooves 154 that make one round in the longitudinal direction at substantially equal intervals.

Also in the twelfth embodiment, the material of the engaging contact protruding member 15 is carbon fiber-dispersed resin, metal powder-dispersed resin, ordinary resin, ceramics, sinter-bonded gold or gun metal.

[0057]

According to the first aspect of the present invention, an elongated linear motion guide rail having a substantially rectangular cross section, and an upper part and an upper part that straddle both side surfaces and an upper surface of the linear motion guide rail and travel linearly in the longitudinal direction. Is a linear motion block having a substantially U-shaped cross section, which is composed of left and right side parts that extend downwards at right angles from both ends of the linear motion block, and a surface contact protrusion is formed on the inner surface of the upper part of the linear motion block to provide surface contact. The surface of the protrusion and the upper surface of the linear motion guide rail are in surface contact with each other, and the engaging contact protrusions are formed on the inner surfaces of the left and right side parts so as to extend in the straight traveling direction, and on the left and right side faces of the linear motion guide rail. A guide groove into which the tip of the engaging contact protrusion of the linear motion block fits is formed so as to extend in the longitudinal direction, and the tip of the engaging contact protrusion of the linear motion block engages with the guide groove of the linear guide rail. The linear motion block comes off from the linear motion guide rail because they make contact. The first effect is that it can run smoothly without oil, and that it does not generate noise. The friction resistance between the linear motion block and the linear motion guide rail is extremely low, and the temperature hardly rises even during continuous operation. The second effect is that, even if it is used for a long period of time, there is almost no wear, no abrasion powder is generated and it does not become dirty, and the clearance between the linear motion block and the linear motion guide rail is kept constant, and there is no backlash. As a result, the fourth effect that a large vertical load can be smoothly linearly run even if it is applied to the linear motion block by bearing the vertical load by the surface contact between the surface of the surface contact protrusion and the upper surface of the linear motion guide rail. In addition, since the in-plane torque perpendicular to the longitudinal direction of the linear motion guide rail is supported by the surface contact between the surface of the surface contact protrusion and the upper surface of the linear motion guide rail, it also withstands such external force. The fifth effect of being able to obtain.

According to a second aspect of the present invention, an elongated linear motion guide rail having a substantially rectangular cross section and both side surfaces and an upper surface of the linear motion guide rail are linearly traveled in the longitudinal direction from both upper and upper ends. There is a linear motion block having a substantially U-shaped cross section, each of which is composed of left and right side parts extending downward at right angles, and a surface contact protrusion is formed on the upper surface of the linear motion guide rail.
The surface of the surface contact protrusion and the inner surface of the upper part of the linear motion block make surface contact, and the engaging contact protrusions are formed on the inner surfaces of the left and right side parts so as to extend in the straight running direction, and the left and right sides of the linear motion guide rails. A guide groove into which the tip of the engaging contact protrusion of the linear motion block fits is formed so as to extend in the longitudinal direction, and the tip of the engaging contact protrusion of the linear motion block and the guide of the linear guide rail are formed. Since the groove engages with the groove, the linear motion block can be smoothly linearly driven without oil and does not generate noise as in the present invention according to the first aspect, without falling off from the linear motion guide rail. 1st effect, the frictional resistance between the linear motion block and the linear motion guide rail is extremely low, and the second effect is that the temperature hardly rises even during continuous operation. It does not get dirty and does not get dirty, and it is a direct acting block The third effect that the clearance of the dynamic guide rail is kept constant and no play is generated, and a vertical load is increased by the surface contact between the surface of the surface contact protrusion and the upper surface of the linear guide rail. The fourth effect that smooth linear motion can be achieved even if a vertical load is applied to the linear motion block, and the torque in the plane perpendicular to the longitudinal direction of the linear motion guide rail is generated between the surface of the surface contact protrusion and the upper surface of the linear motion guide rail. Since it is also supported by surface contact, the fifth effect is obtained that it can withstand such external force.

According to a sixth aspect of the present invention, there is provided a long linear motion guide rail and a linear motion guide rail each having a bottom portion and left and right side portions extending upward at right angles from both ends of the bottom portion and having a substantially U-shaped cross section. It is a linear motion block that fits inside and travels straight in the longitudinal direction and has a substantially rectangular cross-section.By forming a surface contact protrusion on the bottom surface of the linear motion block, The inner surface of the bottom of the dynamic guide rail makes surface contact, and the engaging contact protrusions are formed on the left and right side surfaces so as to extend in the straight running direction, and the direct acting block is formed on the inner surface of the left and right side portions of the linear guide rail. The guide groove into which the tip of the engaging contact protrusion of is inserted is formed so as to extend in the longitudinal direction, and the tip of the engaging contact protrusion of the linear motion block and the guide groove of the linear motion guide rail make engaging contact. Similarly to the present invention according to claim 1, the linear motion block is a linear motion guide rail. The first effect is that it can run smoothly without oil, without causing oil to drop, and it does not generate noise. The frictional resistance between the linear motion block and the linear motion guide rail is extremely low, and even if it is operated continuously, almost no temperature is reached. The second effect is that it does not rise, there is almost no wear even if it is used for a long period of time, no abrasion powder is generated and it is not contaminated, and the clearance between the linear motion block and the linear motion guide rail is kept constant, and there is no backlash. A third effect is that a large vertical load can be smoothly linearly moved even when applied to a linear motion block by bearing a vertical load by surface contact between the surface of the surface contact protrusion and the upper surface of the linear motion guide rail. 4 and the torque in the plane perpendicular to the longitudinal direction of the linear guide rail are supported by the surface contact between the surface of the surface contact protrusion and the upper surface of the linear guide rail. The fifth effect of being able to withstand an external force is obtained.

According to a seventh aspect of the present invention, a long linear motion guide rail and a linear motion guide rail each having a bottom portion and left and right side portions extending upward at right angles from both ends of the bottom portion and having a substantially U-shaped cross section are provided. It is a linear motion block that fits inside the rail and travels in a straight line in the longitudinal direction and has a substantially rectangular cross section. By forming a surface contact protrusion on the inner surface of the bottom of the linear motion guide rail, the surface contact protrusion slides. Surface and the bottom surface of the linear motion block are in surface contact, engaging contact protrusions are formed on the left and right side surfaces so as to extend in the straight running direction, and the linear motion block is formed on the inner surface of the left and right side parts of the linear motion guide rail. The guide groove into which the tip of the engaging contact protrusion of is inserted is formed so as to extend in the longitudinal direction, and the tip of the engaging contact protrusion of the linear motion block and the guide groove of the linear motion guide rail make engaging contact. Similarly to the present invention according to claim 1, the linear motion block is a linear motion guide rail. The first effect is that it can run smoothly without oil, without causing oil to drop, and it does not generate noise. The frictional resistance between the linear motion block and the linear motion guide rail is extremely low, and even if it is operated continuously, almost no temperature is reached. The second effect is that it does not rise, there is almost no wear even if it is used for a long period of time, no abrasion powder is generated and it is not contaminated, and the clearance between the linear motion block and the linear motion guide rail is kept constant, and there is no backlash. A third effect is that a large vertical load can be smoothly linearly moved even when applied to a linear motion block by bearing a vertical load by surface contact between the surface of the surface contact protrusion and the upper surface of the linear motion guide rail. 4 and the torque in the plane perpendicular to the longitudinal direction of the linear guide rail are supported by the surface contact between the surface of the surface contact protrusion and the upper surface of the linear guide rail. The fifth effect of being able to withstand an external force is obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a linear motion block according to a first embodiment.

FIG. 2 is a perspective view of a linear guide rail according to a second embodiment.

FIG. 3 is a front view of a linear motion block according to a third embodiment.

FIG. 4 is a front view of a linear motion block according to a fourth embodiment.

FIG. 5 is a perspective view of the engagement contact protrusion member of the embodiment.

FIG. 6 is a perspective view of the engagement contact protrusion member of the embodiment.

FIG. 7 is a perspective view of the engagement contact protrusion member of the embodiment.

8 is a cross-sectional view of a linear motion block of an embodiment incorporating the engagement contact protrusion member shown in FIG.

FIG. 9 is a perspective view of a KR linear motion block according to a fifth embodiment.

FIG. 10 is a perspective view of a KR linear motion block according to a sixth embodiment.

FIG. 11 is a perspective view of a KR linear motion guide rail of a seventh embodiment.

FIG. 12 is a perspective view of a KR linear motion block according to an eighth embodiment.

FIG. 13 is a perspective view of a linear guide rail of a ninth embodiment.

FIG. 14 is a perspective view including a partial cross section of a conventional LM linear motion guide rail and an LM linear motion block.

FIG. 15 is a sectional view of a conventional LM linear motion block.

FIG. 16 is an assembly diagram of a linear motion block according to the tenth embodiment.

FIG. 17 is a perspective view of an engagement contact protruding member of the eleventh embodiment.

FIG. 18 is a perspective view of an engagement contact protrusion member of the twelfth embodiment.

[Explanation of symbols]

 1 LM direct acting block 101 upper part 102 side part 103 side part 104 screw hole 105 anchor groove 106 groove 107 groove 108 jaw part 109 jaw part 161 ball bearing running groove 162 ball bearing running groove 163 ball bearing running groove 164 ball bearing running groove 165 Ball bearing running hole 166 Ball bearing running hole 167 Ball bearing running hole 168 Ball bearing running hole 2 LM Linear motion guide rail 201 Top surface 202 Side surface 203 Side surface 204 Through hole 205 Ball bearing running groove 206 Ball bearing running groove 207 Ball bearing running groove 208 Ball bearing running groove 209 groove 210 groove 3 surface contact protrusion 301 contact surface 4 engaging contact protrusion 5 engaging contact protrusion 6 inner surface coating resin layer 601 surface contact protrusion 602 Engagement contact protrusion 603 Engagement contact protrusion 7 Plate member 701 Contact surface 8 Holder 801 Notch 9 Sliding element 901 Engagement contact protrusion 902 Notch 903 Serpentine groove 11 KR linear motion block 111 Bottom surface 112 Side surface 113 Side surface 114 Groove 115 Groove 116 Screw hole 117 Circular through hole 118 V groove 119 Notch 12 Surface contact protruding member 13 Engagement contact protruding member 14 KR linear guide rail 141 Bottom portion 142 Side portion 143 Side portion 144 Bottom surface 145 Inner surface 146 Inner surface 147 V-shaped groove 148 V-shaped groove 149 Groove 15 Engagement contact protruding member 151 Sliding surface 152 Assembly surface 153 Disc-shaped protrusion 154 Groove 16 Surface contact protruding member 17 Female screw part 18 Rectangular member 20 End block 21 Dust Protect plate 22 Ball bearing

Claims (10)

[Claims] 1. A long linear motion guide rail having a substantially rectangular cross section and straddling both side surfaces and an upper surface of the linear motion guide rail,
A linear motion block having a substantially U-shaped cross-section, the linear motion block running straight in the longitudinal direction and comprising left and right side parts extending downward at right angles from both ends of the linear motion block, and the inner surface of the upper part of the linear motion block. A surface contact protrusion is formed on the upper surface of the linear motion guide rail so that the surface of the surface contact protrusion is in surface contact with the upper surface of the linear motion guide rail, and the engaging contact protrusion extends on the inner surface of the left and right side portions in the straight traveling direction. And a guide groove into which the tip of the engaging contact protrusion of the linear motion block fits is formed on the left and right side surfaces of the linear motion guide rail so as to extend in the longitudinal direction. A linear motion block and a linear motion guide rail, characterized in that the tip of the engaging contact protrusion of the linear motion guide rail and the guide groove of the linear motion guide rail make an engaging contact. 2. A long linear guide rail having a substantially rectangular cross section and straddling both side surfaces and an upper surface of the linear guide rail,
A linear motion block having a substantially U-shaped cross section, which is linearly running in the longitudinal direction and is composed of an upper part and left and right side parts extending downward at right angles from both ends of the upper part. Forming a surface contact protrusion, the surface of the surface contact protrusion and the inner surface of the upper portion of the linear motion block are in surface contact, and the engaging contact protrusions extend to the inner surfaces of the left and right side portions in the straight traveling direction. And a guide groove into which the tip of the engaging contact protrusion of the linear motion block fits is formed on the left and right side surfaces of the linear motion guide rail so as to extend in the longitudinal direction. A linear motion block and a linear motion guide rail, characterized in that the tip of the engaging contact protrusion of the linear motion guide rail and the guide groove of the linear motion guide rail make an engaging contact. 3. The surface contact protrusion and the engagement contact protrusion are made of carbon fiber-containing resin, ceramic, metal powder-dispersed ceramic, or sinter-bonded gold. Linear motion block and linear motion guide rail described. 4. The linear motion according to any one of claims 1 to 3, wherein a cross-sectional shape of a tip of the engagement contact protrusion is a semicircle, a quadrangle or a V shape. block. 5. The engaging contact protrusions are formed only at the inlet and outlet of the linear motion block, and the engaging contact protrusions are not formed in the middle, and the escape portions are formed.
The linear motion block described in any one of 1 to 4. 6. A long linear motion guide rail having a substantially U-shaped cross section, which is composed of a bottom part and left and right side parts extending vertically upward from both ends of the bottom part, and is fitted inside the linear motion guide rail. A linear motion block that travels straight in the longitudinal direction and has a substantially rectangular cross section, wherein a surface contact protrusion is formed on the bottom surface of the linear motion block, and a sliding surface of the surface contact protrusion and the linear motion guide The inner surface of the bottom of the rail is in surface contact, and the engaging contact protrusions are formed on the left and right side surfaces so as to extend in the straight traveling direction, and the linear motion is formed on the inner surfaces of the left and right side portions of the linear guide rail. A guide groove into which the tip of the engaging contact protrusion of the block fits is formed so as to extend in the longitudinal direction, and the tip of the engaging contact protrusion of the linear motion block engages with the guide groove of the linear motion guide rail. A linear motion block and a linear motion guide rail that are in contact with each other. 7. A long linear motion guide rail having a substantially U-shaped cross section, which is composed of a bottom part and left and right side parts extending upward at right angles from both ends of the bottom part, and fitted inside the linear motion guide rail. A linear motion block that travels straight in the longitudinal direction and has a substantially rectangular cross section, wherein a surface contact protrusion is formed on the inner surface of the bottom of the linear motion guide rail, and the sliding surface of the surface contact protrusion and the sliding surface The bottom surface of the linear motion block makes surface contact, and the engaging contact protrusions are formed on the left and right side surfaces so as to extend in the straight running direction, and the linear motion is formed on the inner surfaces of the left and right side parts of the linear motion guide rail. A guide groove into which the tip of the engaging contact protrusion of the block fits is formed so as to extend in the longitudinal direction, and the tip of the engaging contact protrusion of the linear motion block engages with the guide groove of the linear motion guide rail. A linear motion block and a linear motion guide rail that are in contact with each other. 8. The surface contact protrusion and the engagement contact protrusion are made of carbon fiber-containing resin, ceramic, metal powder dispersed ceramic, or sinter-bonded gold, according to claim 6 or 7. Linear motion block and linear motion guide rail described. 9. The linear motion according to claim 6, wherein a cross-sectional shape of a tip of the engaging contact protrusion is a semicircle, a quadrangle, or a V shape. block. 10. The engaging contact protrusions are formed only at the inlet and outlet of the linear motion block, and the engaging contact protrusions are not formed in the middle, and the escape portions are formed. The linear motion block according to any one of 9 to 9.