JP2003232350A - Linear guide bearing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a linear guide bearing device, in which a lubricant- containing member can be provided without increasing the count of constitutional parts, and lubricant can be stably supplied to rolling elements for a long term. <P>SOLUTION: In the linear guide bearing device 1, projections 40a are provided to a protection plate 60 constituting a slide 20. The projections 40a biases the deformable lubricant-containing member 70 containing the lubricant so as to push it out to the side of a guide rail 10. <P>COPYRIGHT: (C)2003,JPO

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 bearing device, and more particularly to a lubricant supply device capable of stably supplying a lubricant to rolling elements over a long period of time.

[0002]

2. Description of the Related Art Conventionally, as a technique capable of stably supplying a lubricant to a rolling element of a linear motion guide bearing device, Japanese Patent Laid-Open No. 9-536.
There is an invention of a linear motion guide bearing device described in Japanese Patent No. 37 (first conventional example) and an invention of a linear motion guide unit including a lubricating plate described in Japanese Patent Application Laid-Open No. 11-351251 (second conventional example). .

That is, in the first conventional example, a lubricant containing member and another member are superposed and fixed to the end of the slider which moves along the guide rail, and a through hole formed in the lubricant containing member. Further, a ring-shaped member having a larger cross-sectional area than this is fitted, and the lubricant-containing member is deformed to press it against the guide rail to stably supply the lubricant to the rolling elements.

Further, in the second conventional example, a lubricating resin plate made of sintered resin fixed to a core metal is attached to an end of a slider which moves along the guide rail, and the guide rail and the lubricating plate are slidably contacted with each other. , The lubricant is stably supplied to the rolling elements.

[0005]

However, in the first conventional example, a ring-shaped member or the like for pressing the lubricant-containing member against the guide rail is additionally required, and the number of parts constituting the linear guide bearing device increases. There is a problem. Also,
In the second conventional example, when the linear motion guide bearing device is driven for a long period of time, the wear of the portion where the lubrication plate slides on the guide rail is unavoidable, the contact between the guide rail and the lubrication plate becomes insufficient, and the rolling element is lubricated. There is a problem in that it cannot be stably supplied for a long period of time.

Therefore, the present invention has been made in order to eliminate the above-mentioned problems of the prior art, and an object thereof is to contain a lubricant without increasing the number of components of the linear guide bearing device. (EN) Provided is a linear guide bearing device which can be mounted on a linear guide bearing device and in which the lubricant-containing member is in constant contact with the guide rail even after being driven for a long period of time and which can stably supply the lubricant to the rolling elements. Is.

[0007]

The present invention has the following constitution in order to solve the problems. According to the invention of claim 1, the slider is loosely fitted to a guide rail that has a rolling element rolling groove on the outer surface and extends in the axial direction, and the slider is opposed to the guide rail between the guide rail and the slider. In a linear guide bearing device in which a large number of rolling elements to be moved are loaded and the slider includes a deformable lubricant-containing member, the lubricant-containing member is deformed and pushed out to the guide rail side. A linear guide bearing in which a pressing projection is integrally formed on a member that constitutes the slider including the lubricant-containing member by the same material as that of the slider, and the lubricant-containing member is pressed and biased toward the guide rail by the projection. It is a device.

A deformable lubricant-containing member is included in a part of the member forming the slider, and a protrusion formed on any member forming the slider presses the lubricant-containing member against the guide rail. Therefore, the lubricant-containing member is in contact with the guide rail. Therefore, as the lubricant-containing member, which is a part of the slider, slides on the guide rail, the lubricant gradually exudes from the lubricant-containing member and is supplied to the guide rail. The linear motion guide bearing device can be stably and smoothly driven by being automatically supplied to the rolling elements through the rail surface and the rolling element rolling grooves.

Further, even if the slider slides on the guide rail for a long period of time and wear occurs at a portion where the lubricant-containing member is in sliding contact with the guide rail, the worn lubricant-containing member is deformed by the pressing force from the projection. Then, the sliding contact with the guide rail is maintained, and the supply of lubricant to the rolling elements is maintained. Further, since the protrusion is integrally formed on any member constituting the slider by using the same material as that of the slider, no additional component is required to form the protrusion.

According to a second aspect of the present invention, the protrusion is formed integrally with a member constituting the slider excluding the lubricant containing member by the same material as the slider, and the lubricant containing member is at least partially formed. The compression reduction is carried out, and it inserted in the space formed between the said protrusion and the said guide rail.
The linear motion guide bearing device described in 1. The protrusion that presses and urges the lubricant-containing member can be integrally formed on a member that is a member of the slider and that is different from the lubricant-containing member by using the same material. When a lubricant-containing member that is at least partially reduced and deformed by applying compressive force is sandwiched between the protrusion and the guide rail, the lubricant-containing member applies force to the protrusion in an attempt to restore its original shape, and It receives pressure as a reaction. The lubricant-containing member is pressed and urged toward the guide rail by the pressure from the projections, the lubricant-containing member always remains in sliding contact with the guide rail, and the lubricant is stably supplied to the rolling elements.

According to a third aspect of the present invention, the lubricant-containing member is integrally formed with the protrusion, and the slider is provided with a hole for fitting with the protrusion except the lubricant-containing member. The protrusion is fitted to the hole in a state where the lubricant-containing member is at least partially compressed and contracted due to a difference in position or size of the protrusion and the hole, which is formed on a member constituting the protrusion. It is the described linear motion guide bearing device.

A projection for pressing the lubricant-containing member is integrally formed on the lubricant-containing member itself with the same material, and a hole into which the projection fits is formed by a slider different from the lubricant-containing member. It can be formed into a component. When a compressive force is applied to the lubricant-containing member to cause the lubricant-containing member to be at least partially reduced and deformed to fit the protrusion and the hole,
In the lubricant-containing member, the projections exert a force on the inner wall of the hole in an attempt to restore the original shape, and the projection receives a reaction as a reaction from the inner wall of the hole. Here, since the protrusion is a part of the lubricant-containing member, the lubricant-containing member is pressed. As a result, the lubricant containing member is pressed and urged against the guide rail, the lubricant containing member always remains in sliding contact with the guide rail, and the lubricant is stably supplied to the rolling elements.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. First, the configuration of the first embodiment will be described. 1 to 4 are views showing a first embodiment of the present invention. As shown in FIG. 1, the linear motion guide bearing device 1 has a guide rail 10 that has rolling element rolling grooves 14A and 14B on its outer surface and extends in the axial direction, and a slider 20 that is mounted over the guide rail 10. Equipped with.

An upper surface 11 of the guide rail 10 and side surfaces 1 on both sides.
One rolling element rolling groove 14 consisting of an axial concave groove having a circular arc shape with a cross section of about a quarter is formed on the ridge line where the two intersect.
A is formed. In addition, the side surface 12 of the guide rail 10
The other rolling element rolling groove 14B, which is an axial groove having a substantially semicircular cross section, is formed at the intermediate position. An escape groove 15 of the cage is formed at the groove bottom of the rolling element rolling groove 14B to prevent the rolling element from falling off when the slider 20 is not assembled to the guide rail 10.

On the other hand, the slider 20 has a slider body 30.
And the end cap 50, the protective plate 60, the lubricant containing member 70, and the side seal 80, which are fixedly attached to the both ends in the axial direction in this order (FIGS. 2 and 3).
See). The end cap 50, the protective plate 60, the lubricant containing member 70, and the side seal 80 are attached to the slider body 30 using attachment screws 36. The slider body 30 has a generally U-shaped cross section that is open downward and is continuous in the axial direction. The slider body 30 is shown to face the rolling element rolling grooves 14A and 14B of the guide rail 10 on the inner side surfaces of the U-shaped sleeves. It has an unloaded rolling element rolling groove, and a rolling element return path that axially penetrates the thick portion of the sleeve portion. A space formed between the load rolling element rolling groove and the rolling element rolling grooves 14A and 14B facing the load rolling element forms a rolling element rolling path. In addition,
Reference numeral 32 in the drawing is a grease nipple.

The end cap 50 is made of a synthetic resin material by injection molding or is made of metal, and when viewed in the axial direction, the outer shape is approximately U-shaped with its downward opening. The end cap 50 has a curved path (not shown) that communicates the loaded rolling element rolling groove of the slider body 30 with the rolling element return path parallel to the loaded rolling element return path, the curved paths at both ends, and the rolling element rolling path. A rolling element circulation circuit is formed with the road. This rolling element circulation circuit is loaded with a large number of rolling elements made of, for example, steel balls. A through hole 51A for the mounting screw 36 is formed through the U-shaped sleeve portion 52 of the end cap 50.
A through hole 51B for the grease nipple 32 is formed in the connecting portion 53 for connecting the. The end cap 5
0 is not in contact with the guide rail 10.

A protective plate 60, which is a steel plate, is superposed on the outer surface side of the end cap 50 (the side farther from the slider body 30). When the protective plate 60 is viewed from the axial direction, the protective plate 60 has an approximately U-shape that opens downward in conformity with the outer shape of the end cap 50. Two protrusions 40 a are formed on the protective plate 60. The outer surface side of the protective plate 60 (slider body 3
Protrusions 40a each in the shape of a rectangular parallelepiped project from the left and right U-shaped sleeves 62 on the side farther than 0) on the side far from the end cap 50 and on the left and right sides of the protective plate 60 continuously in the vertical direction. There is. The distance between the left and right protrusions 40a is the same as the lubricant-containing member 7 when no external force is applied.
The size is slightly smaller than the width of 0 in the left-right direction. Each protrusion 4
The axial length of the protrusion 0a is equal to or slightly longer than the thickness of the lubricant-containing member 70.
The width of 0a in the left-right direction is about half the width of the sleeve 62 in the left-right direction. A through hole 61A for the mounting screw 36 is formed so as to penetrate the sleeve portion 62 and the protrusion 40a, and a through hole 61B for the grease nipple 32 is formed in a connecting portion 63 that connects both sleeve portions 62. The protective plate 60 is not in contact with the guide rail 10.

Further, the lubricant-containing member 70 has its left and right side surfaces sandwiched between the protrusions 40a of the protective plate 60 and is superposed on the outer surface side of the protective plate 60, and its outer shape is a downwardly-opened U-shape. (See FIG. 4). The U-shaped inner surface of the lubricant-containing member 70 conforms to the cross-sectional shape of the guide rail 10, the upper surface 11 of the guide rail 10 and the side surface 12 including the rolling element rolling grooves 14A and 14B, or at least the rolling element rolling groove 14A. , 14B so as to be slidable. In addition, the guide rail 10 is provided on the inner surface of the U-shape.
In a portion facing the rolling element rolling groove 14A, a convex portion 74A is formed so as to be in sliding contact with the inner surface of this groove. Similarly, a convex portion 74B is formed on a portion of the inner surface of the U-shape that faces the rolling element rolling groove 14B and the clearance groove 15 of the guide rail 10.
Are formed. An outer side surface of the U-shaped sleeve portion 72 of the lubricant containing member 70 is a flat surface, and a through hole 71B for the grease nipple 32 is formed in a connecting portion 73 connecting the sleeve portions 72. The width of the lubricant containing member 70 in the left-right direction when the external force is not applied is equal to the protective plate 60.
The size is slightly larger than the distance between the two protrusions 40a of
The height is approximately the same as the height of the protective plate 60. Further, the lubricant-containing member 70 is made of rubber or synthetic resin containing a lubricant and is deformable by an external force. The lubricant containing member 70 sandwiched between the protrusions 40a is
It is compressed from the left and right side surfaces by 0a, and its width is reduced to a length corresponding to the interval between both protrusions 40a. In other words, the left and right side surfaces of the lubricant-containing member 70 are in contact with the entire surfaces of the opposing projections 40a, and the entire surfaces of the projections 40a press the side surfaces of the lubricant-containing member 70.

The side seal 80 has a substantially U-shaped steel plate that is opened downward in accordance with the outer shape of the end cap 50, and has a shape similar to this steel plate and is provided on the outer surface (the surface farther from the slider body 30). It is composed of polyurethane rubber containing grease integrally molded. The lip portion 84 of the side seal 80 that comes into contact with the guide rail 10 has a cross-sectional shape of the guide rail 10 so that the inner surface of the U-shape can seal the gap between the slider 20 and the guide rail 10. In addition, a shape capable of sliding contact with the upper surface 11 and the side surface 12 of the guide rail 10, more specifically, rolling element rolling grooves 14A and 14B and a clearance groove 15
It is also shaped so that it can be slid on. A through hole 81A for the mounting screw 36 is formed through the U-shaped sleeve portion 82 of the side seal 80, and the connecting portion 83 connecting both sleeve portions 82 has a through hole for the grease nipple 32. Hole 81B is formed.

The present embodiment is configured as described above, and its operation will be described below. That is, when the slider 20 relatively moves on the guide rail 10, the rolling elements in the slider 20 roll in the rolling element rolling path, and the slider 2
The slider 2 moves relatively in the opposite direction to the moving direction of 0.
U-turn on the curved path on the rear end side with respect to the moving direction of 0 to move in the same direction as the moving direction of the slider 20 while rolling on the rolling element return path, and make a reverse U-turn on the curved path on the other end side. Then, the circulation returning to the rolling element rolling path is repeated.

When the linear guide bearing device 1 is driven in this manner, the lubricant containing member 70 forming a part of the slider 20.
Also moves while being in contact with the guide rail 10, and the lubricant is gradually exuded from the lubricant containing member 70 with the influence of frictional heat during the movement. The lubricant that has exuded is automatically supplied to the rolling elements rolling in the rolling element rolling grooves 14A and 14B of the guide rail 10, especially through the rolling element rolling grooves 14A and 14B. Due to this self-lubricating property, a stable and smooth operation of the linear guide bearing device 1 is performed.

Here, when the linear guide bearing device 1 is driven for a long period of time, the lubricant containing member 7 which is in sliding contact with the guide rail 10 is provided.
Wear occurs on the inner surface of the U-shape of 0. However, the lubricant-containing member 70 is compressed and reduced in the width in the left-right direction and is sandwiched between the protrusions 40a.
It is constantly pressed by the urging force from 0a, and the sleeve portion 72 receives the urging force from the protrusion 40a toward the inside of the U-shape, and the inner surface of the U-shape is pressed against the guide rail 10. Therefore, even if wear occurs on the U-shaped inner surface of the lubricant-containing member 70, the lubricant-containing member 70 is deformed by this urging force, and the lubricant-containing member 70 is attached to the upper surface 11 and the side surface 12 of the guide rail 10. Alternatively, it remains in close contact with at least the rolling element rolling grooves 14A and 14B.

Further, as the lubricant exudes from the lubricant containing member 70, the lubricant containing member 70 self-contracts,
The contracting force also causes the left and right side surfaces 12 of the guide rail 10.
On the other hand, since the U-shaped inner surface of the lubricant-containing member 70 is pressed against, it comes into close contact with each other. That is, even if the linear guide bearing apparatus 1 is driven for a long period of time, the lubricant containing member 70 remains in close contact with the upper surface 11 and the side surface 12 of the guide rail 10, and the lubricant is contained in the rolling element rolling groove 1
It is stably and automatically supplied to the rolling elements via 4A and 14B.

Since the lubricant-containing member 70 is a member that is sandwiched between the protective plate 60 and the side seal 80 and is not fixed to another member, a smooth rolling of the rolling element is maintained for a long period of time. It is easy to make the size enough to contain a sufficient amount of lubricant, and it is also easy to make the size of the protrusion 40a correspond to the size of the lubricant containing member 70. The member 70 can be easily replaced, and the lubricant-containing member 70 can be easily arranged.

By changing the width of the lubricant-containing member 70 in the left-right direction, the projection 40a is formed in the lubricant-containing member 7
The biasing force for pressing 0 can be adjusted. In order to increase or decrease this urging force, the width of the lubricant containing member 70 may be increased or decreased, and the size of the lubricant containing member 70 can be easily changed. The distance between the protrusions 40a can be reduced or increased for the same purpose.

Further, since the side seal 80 is used as a plate-like member that covers the outer side surface of the lubricant containing member 70, the sealability is high. In addition, the side seal 80 and the protective plate 60
Since the lubricant-containing member 70 is sandwiched between them, the frictional resistance is low, so that the lip portion 84 of the side seal 80 that comes into contact with the guide rail 10 is unlikely to roll up even when the slider 20 reciprocates. The leakage of grease inside the slider 20 to the outside is also reduced. Also,
The lubricant exuded from the lubricant-containing member 70 is the guide rail 1
It is also supplied to the lip portion 84 that contacts 0
Wear is reduced, and since the lip portion 84 is molded from a polyurethane rubber containing grease, the lubricant is also supplied by themselves and the wear of the lip portion 84 is reduced.

The side surface of the lubricant-containing member 70 which receives the biasing force from the projection 40a is a flat surface, and the side surface of the lubricant-containing member 70 contacts and is pressed by the entire surface of the projection 40a opposite thereto. However, the first modification of FIG. 5 is used instead.
As shown in FIG. 7, convex portions 74C are formed on the left and right outer sides of the sleeve portion 72 of the lubricant-containing member 70. The top portions of the convex portions 74C contact the protrusions 40a to be deformed, and the top portions of the convex portions 74C are protruded by the protrusions 40C.
It is also possible to apply a biasing force from a and to be pressed.

Further, since the lubricant is constantly supplied from the lubricant containing member 70 to the rolling elements, the grease nipple 32 is not attached to the slider 20, so that the through hole 51B,
61B, 71B and 81B may not be formed or closed with a blind plug.

Further, through holes 51A and 61A for mounting screws
And 81A are formed on the end cap 5 described above.
0, the protective plate 60, and the position on the side seal 80 are not limited, and the positions can be changed as necessary, and the shapes of the protrusion 40a and the lubricant containing member 70 protruding from the protective plate 60 and Depending on the dimensions,
A through hole for a mounting screw can also be provided on the lubricant containing member 70. 6 to 8 are views showing a second embodiment of the present invention. The same members and parts as those in the first embodiment are designated by the same reference numerals, and the duplicate description thereof will be omitted. That is, in this embodiment, in the linear motion guide bearing device 1 equivalent to that of the first embodiment, the two protrusions 40b are formed on the end cap 50,
The protrusions 40b project from both sleeve portions 52 of the end cap 50, and the protection plate 60 and the lubricant-containing member 70 are sandwiched between the protrusions 40b and arranged so as to overlap with each other. The shape of is changed.

Specifically, the projections 40b having a substantially rectangular parallelepiped shape from the left and right U-shaped sleeve portions 52 on the outer surface side of the end cap 50 are on the side far from the slider body 30 and on the left and right sides of the end cap 50. In the vertical direction, it continuously projects. The distance between the left and right protrusions 40b is the same as the lubricant-containing member 7 in the state where no external force is applied.
The size is slightly smaller than the width of 0 in the left-right direction. Each protrusion 4
The axial length of 0b is equal to or slightly larger than the thickness of the protective plate 60 and the lubricant-containing member 70 stacked. Mounting screw 36 penetrating the sleeve 52 and the protrusion 40b
A through hole 51A for use is formed.

Further, the protective plate 60 is the end cap 50.
Although it is a flat U-shaped steel plate that is opened downward in accordance with the outer shape of the above, notches 42a that fit with the protrusions 40b of the end cap 50 are formed on the left and right sides of the protective plate 60, respectively. The through hole formed in the protective plate 60 is only the through hole 61B for the grease nipple 32 in the connecting portion 63. Left and right notches 42a and both protrusions 4
0b is fitted, and the protective plate 60 is sandwiched between the both protrusions 40b and fixed to the slider body 30.

Further, the lubricant-containing member 70 has the both protrusions 40b.
Is compressed from the left and right side surfaces by its width in the left-right direction to a length corresponding to the interval between the protrusions 40b, and is sandwiched between the protrusions 40b and fixed to the slider body 30. The left and right side surfaces of the containing member 70 are constantly pressed by the urging force from the protrusions 40b on both sides and pressed against the guide rail 10. The sleeve portion 72 of the lubricant-containing member 70 receives an urging force from the protrusion 40b inward in a U-shape.

The other structure is the same as that of the first embodiment. Therefore, as in the first embodiment,
Even if the U-shaped inner surface of the lubricant-containing member 70 is worn, the lubricant-containing member 7 is urged by the urging force from the protrusion 40b.
0 is pressed and deformed, and the lubricant containing member 70 remains in close contact with the upper surface 11 and the side surface 12 of the guide rail 10 or at least the rolling element rolling grooves 14A and 14B. Furthermore,
The contraction force associated with the self-contraction of the lubricant-containing member 70 also causes the lubricant-containing member 70 to come into close contact with the guide rail 10. That is, even if the linear guide bearing device 1 is driven for a long period of time, the lubricant is stably and automatically supplied to the rolling elements.

9 to 11 are views showing a third embodiment of the present invention. The same members and parts as those in the first embodiment are designated by the same reference numerals, and the duplicate description thereof will be omitted. That is, in this embodiment, in the linear motion guide bearing device 1 equivalent to that of the first embodiment, the two protrusions 40c are formed on the side seal 80, and the protrusion 40c is formed on both sleeves of the side seal 80. The shapes of the protective plate 60 and the side seals 80 are respectively changed and protrude from the portions 82.

Specifically, the protection plate 60 is a flat plate shape, and has a substantially U-shape that is opened downward in accordance with the outer shape of the end cap 50. A through hole 61A for the mounting screw 36 is formed through the sleeve portion 62 of the protective plate 60. Further, from the left and right sleeve portions 82 of the side seal 80, projections 40c each having an approximately rectangular parallelepiped shape are continuously projected in the vertical direction on the side close to the lubricant containing member 70 and on the left and right sides of the side seal 80. Left and right protrusion 4
The distance between 0c is slightly smaller than the width of the lubricant containing member 70 in the left-right direction when no external force is applied. The axial length of each protrusion 40c is equal to or slightly larger than the thickness of the lubricant containing member 70.
A through hole 81A for the attachment screw 36 is formed through the sleeve portion 82 and the protrusion 40c.

Further, the lubricant-containing member 70 has both projections 40c.
Are compressed from the left and right side surfaces by the width of the left and right sides to a length corresponding to the distance between the protrusions 40c, and are sandwiched between the protrusions 40c and fixed to the slider body 30. The left and right side surfaces of the containing member 70 have projections 4 on both sides.
A biasing force is constantly applied from 0c to be pressed and pressed against the guide rail 10. The sleeve portion 72 of the lubricant-containing member 70 receives an urging force inward from the protrusion 40c in a U shape.

The other structure is similar to that of the first embodiment. Therefore, as in the first embodiment,
Even if wear occurs on the U-shaped inner surface of the lubricant-containing member 70, the lubricant-containing member 7 is urged by the urging force from the protrusion 40c.
0 is pressed and deformed, and the lubricant containing member 70 remains in close contact with the upper surface 11 and the side surface 12 of the guide rail 10 or at least the rolling element rolling grooves 14A and 14B. Furthermore,
The contraction force associated with the self-contraction of the lubricant-containing member 70 also causes the lubricant-containing member 70 to come into close contact with the guide rail 10. That is, even if the linear guide bearing device 1 is driven for a long period of time, the lubricant is stably and automatically supplied to the rolling elements.

Incidentally, in each of the above-described embodiments, each protrusion 40
The shape of is a rectangular parallelepiped, the total number of the protrusions 40 is two on the left and right, and the protrusions 40 apply a biasing force to the left and right side surfaces of the lubricant-containing member 70 to press them, but the shape of the protrusions is not limited to the rectangular parallelepiped. However, the number of the protrusions is not limited to two, and the portions where the protrusions apply the biasing force to the lubricant-containing member and press it are not limited to the left and right side surfaces of the lubricant-containing member. . Also, the protrusion is the end cap 50,
The protection plate 60 or the side seals 80 are not limited to those that continuously project in the vertical direction on the left and right sides.

That is, it is possible to use the shapes of the protrusions and the portions to be pressed as shown in modifications 2 to 16 of the first embodiment described below. 12 to 26 show Modified Examples 2 to 16, respectively, and are external views of the lubricant containing member 70 in which the description of the through holes for the mounting screws in each modified example is omitted. Although the protrusions 40a are projected from the protective plate 60 in Modifications 2 to 16, the protrusions can be protruded from the end caps 50 or the side seals 80 in the first embodiment. Is the same as the case of the second and third embodiments. Although illustration of the through holes for the mounting screws is omitted in FIGS. 12 to 26, the through holes for the mounting screws may be included in the end cap 50, the protective plate 60, and the lubricant-containing material depending on the shape and size of the protrusion 40. It can be appropriately formed on the member 70 and the side seal 80.

Modification 2 of the first embodiment shown in FIG.
In, the two protrusions 40 a are formed on the protective plate 60. The protrusions 40a are formed on the left and right sleeve portions 62 of the protective plate 60 on the side far from the end cap 50, and on the left and right sides of the protective plate 60 so as to be vertically continuous. The protrusion 40a protruding from the right sleeve 62 has an arcuate cross section that is continuous in the axial direction, and the curved surface that is formed by the arcs of the arc that faces the inside of the U-shape of the protective plate 60 and that the arcuate chord is continuous. The formed surface is the same as the right side surface of the protective plate 60. The protrusion 40 a protruding from the left sleeve 62 is symmetrical to the protrusion 40 a protruding from the right sleeve 62, and each protrusion 40 a
The curved surfaces of a are opposed to each other. The distance between these curved surfaces is slightly smaller than the width of the lubricant containing member 70 in the left-right direction when no external force is applied. The lubricant-containing member 70 is compressed from the left and right side surfaces by the both protrusions 40a, the width thereof is reduced to a length corresponding to the interval between the both protrusions 40a, and the member 70 is sandwiched between the protrusion 40a and the guide rail 10. The curved surfaces apply a biasing force to press a portion of the side surface of the lubricant-containing member 70 at an intermediate height. At both sleeves 72 of the lubricant containing member 70, a biasing force is applied from the protrusion 40a toward the inside of the U shape of the lubricant containing member 70.

In this modification 2, the lubricant-containing member 7
0 remains in close contact with the upper surface 11 and the side surface 12 of the guide rail 10 or at least the rolling element rolling grooves 14A and 14B due to the self-contracting force and the biasing force of the projection 40a, and drives the linear motion guide bearing device 1 for a long time. However, the lubricant is stably and automatically supplied to the rolling elements. First shown in FIG.
In the modified example 3 of the embodiment, the two protrusions 40a are formed by prisms whose polygonal (trapezoidal) cross section is continuous in the axial direction. Other configurations and operations are the same as those of the second modification.

Modification 4 of the first embodiment shown in FIG.
In the above, the two protrusions 40 a are formed by a circular column having a circular cross section that is continuous in the axial direction, and are located at a height position above the lower end of the protective plate 60 that is approximately one fourth of the height of the protective plate 60.
Other configurations and operations are the same as those of the second modification. Figure 15
In the modified example 5 of the first embodiment shown in FIG.
The surface of the protective plate 60 facing the inner side of the U-shape at 0a is formed in a curved shape (waveform). Other configurations and operations are the same as those of the second modification.

Modification 6 of the first embodiment shown in FIG.
Then, in addition to the cylindrical protrusion 40 a shown in the modification 4 of FIG. 14, another protrusion 40 a is provided from the upper end of the protective plate 60 to the protective plate 60.
It is formed at a height position approximately one-fourth of the height of the. Other configurations and operations are the same as those of the modification 4. In Modification 7 of the first embodiment shown in FIG.
Although there is only one a, it has a frame shape along the outer periphery of the protective plate 60, and the lubricant containing member 70 is compressed and fitted into the frame by the projections 40a from the left and right side surfaces. Other configurations and operations are the same as those of the second modification.

Modification 8 of the first embodiment shown in FIG.
Then, the two protrusions 40 a formed of a flat rectangular parallelepiped respectively protrude from the left and right upper corner portions of the protective plate 60. Further, the outer shape of the lubricant-containing member 70 has an approximately U-shape that is opened downward in conformity with the outer shape of the end cap 50, but is cut at a portion corresponding to the protrusions 40a of the left and right upper corners of the lubricant-containing member 70. The notch 42d is formed. When no external force is applied to the lubricant-containing member 70,
The width of the notch 42d in the left-right direction is slightly smaller than the width of the cross section of the protrusion 40a in the left-right direction.
Is slightly smaller than the height of the cross section of the protrusion 40a, and the distance between the notches 42d is slightly larger than the distance between the left and right protrusions 40a. Lubricant-containing member 7
0 is compressed from the upper and lower sides and both side surfaces between the both protrusions 40a and the guide rail 10 to reduce the width and height of the lubricant containing member 70, and the notch 42d and the protrusion 40a are fitted together.
The lubricant containing member 70 is sandwiched between the protrusion 40 a and the guide rail 10. The lubricant-containing member 70 has a cutout 42d.
At, a downward urging force and a lateral urging force are applied from the protrusion 40a and are pressed.

Other configurations and operations are the same as those of the second modification. In Modification 9 of the first embodiment shown in FIG. 19,
The two protrusions 40a are triangular prisms whose cross sections that form a triangle (right-angled triangle) are continuous in the axial direction. The ridge lines of the triangular prism formed by the continuous right-angled vertices of the right-angled triangle are respectively connected to the upper left and right upper corners of the protective plate 60. In addition, the surface of the triangular prism in which the hypotenuse of the right triangle is continuous is the guide rail 10.
Facing in the direction of. The lateral width of the upper surface of the protrusion 40a is approximately the same as the lateral width of the sleeve portion 62.

Further, the notch 42d is similar to the cross section of the protrusion 40a and has a slightly smaller right-angled triangular shape when the external force is not applied to the lubricant containing member 70.
Other configurations and operations are the same as those of the modification 8. Figure 20
In the tenth modification of the first embodiment shown in FIG. 2, the two protrusions 40 a are quadrangular prisms that protrude from the outer lower corner portions of the left and right sleeve portions 62 and have a quadrangular (square) cross section that is continuous in the axial direction. The dimension of one side of the cross section is approximately one third of the width of the sleeve portion 62 in the left-right direction.

The shape of the cutout 42d is the projection 40a.
It has a rectangular shape with a width slightly smaller than that of the cross section. Other configurations and operations are the same as those of the modification 8. In a modification 11 of the first embodiment shown in FIG. 21, the two protrusions 40a are triangular prisms that project from the vicinity of the roots of the left and right sleeve portions 62 and have a triangular (regular triangle) cross section continuous in the axial direction. Is in the same plane as the side surface of the protection plate 60, and is located at a height position that is approximately a quarter lower than the height of the protection plate 60 from the upper surface of the protection plate 60. The length of one side of the equilateral triangle cross section is approximately two-thirds of the width of the sleeve 62.

The shape of the cutout 42d is the projection 40a.
The shape is similar to the cross section of a small regular triangle. Other configurations and operations are the same as those of the modification 8. In the modified example 12 of the first embodiment shown in FIG. 22, the two protrusions 40 project from the upper surface of the protective plate 60 and have a semicircular cross section that is continuous in the axial direction. The plane formed by the continuous chord portions of the semicircular cross section is continuous with the upper surface of the protective plate 60, and the curved surface formed by the continuous arc portions of the semicircular cross section faces downward. The diameter of the semicircular cross section is slightly smaller than the width of the sleeve portion 62. When viewed from above, the central axis of each protrusion 40a is located approximately above the U-shaped inner side surface of the protective plate 60 facing the side surface 12 of the guide rail 10.

The shape of the cutout 42d is the projection 40a.
It has a semi-circular shape with the same shape as the cross section of. Lubricant-containing member 7
When no external force is applied to 0, the height of the lubricant-containing member 70 at the connecting portion 73 of the sleeve portions 72 is slightly larger than the height at the connecting portion 63 of the sleeve portions 62 of the protective plate 60. Other configurations and operations are the same as those of the modification 8.

Modification 1 of the first embodiment shown in FIG.
3, the two protrusions 40a project from the vicinity of the center of the lower end edges of the left and right sleeve portions 62, and are a quadrangular prism having a constant quadrilateral cross section continuous in the axial direction. One surface of the quadrangular prism is the sleeve portion 62.
One of the remaining three faces is in the same plane as the lower edge of the guide rail, and faces one side 12 of the guide rail 10 on the left side. Turn to the right. The width and height of the square pole in the left-right direction are about one third of the width of the sleeve portion 62 in the left-right direction.

The shape of the notch 42d is the projection 40a.
A quadrilateral with the same shape as the cross section of. Other configurations and operations are the same as those of the modification 8. In Modification 14 of the first embodiment shown in FIG. 24, a protrusion 40a similar to that of Modification 9 is provided.
And the notch 42d, and the protrusion 4 similar to that of the modification 10.
0a and the notch 42d are formed. That is, there are a total of four protrusions 40a and cutouts 42d on the left and right.

The other structure and operation are the same as those of the modification 8. In the modified example 15 of the first embodiment shown in FIG. 25, the shapes and positions of the two protrusions 40 a and the two through holes 71 instead of the notch 42 d in the lubricant containing member 70.
The point that C is formed is different from the modification 8 of FIG. Specifically, each protrusion 40a is a triangular prism having a triangular (regular triangle) cross section, one of the ridgelines of the triangular prism faces the guide rail 10, and the dimension of one side of the regular triangle has a sleeve portion 62. Is about half the width of. Further, each protrusion 40 a is located at a height about one third of the height of the protection plate 60 from the lower end of the sleeve part 62 of the protection plate 60, and the width of the sleeve part 62 from the outer side surface of the protection plate 60. It's about halfway inward.

The outer shape of the lubricant-containing member 70 has a generally U-shape that is open downward in conformity with the outer shape of the end cap 50.
A through hole 71C is formed at a position corresponding to. The through hole 71C has the shape of an equilateral triangle that is the same as the cross section of the protrusion 40a. The through hole 71C is at a height slightly above the convex portion 74B. However, the distance between the two through holes 71C when the external force is not applied to the lubricant-containing member 70 is 2
It is slightly larger than the distance between the two protrusions 40a. The lubricant containing member 70 is compressed from the left and right side surfaces to reduce the width of the lubricant containing member 70, and the through holes 71C and the protrusions 40a are fitted to each other. The lubricant containing member 70 has the protrusions 40a and the guide rails. It is sandwiched between 10.

The lubricant containing member 70 has a through hole 71 on the right side.
In C, a biasing force is applied in a diagonally upper left direction and a diagonally lower left direction via the protrusion 40a on the right side and is pressed, and in the through-hole 71C on the left side, a biasing force is applied in the diagonally upper right direction and the diagonal lower right direction via the left side protrusion 40a. It is loaded with pressure and pressed. Other configurations and operations are the same as those of the modification 8.

Modification 1 of the first embodiment shown in FIG.
In 6, the two protrusions 40a are cylindrical and the circular diameter of the cross section is about one third of the width of the sleeve 62. Each protrusion 4
0a is near the root of the sleeve portion 62 of the protective plate 60, and is at a height about one third of the height of the protective plate 60 from the upper surface edge. The through hole 71C is formed in the vicinity of the root of the sleeve portion 72 and at a height position slightly above the convex portion 74A, and has the same circular shape as the cross section of the protrusion 40a.

The other structure and operation are the same as those of the modification 15. In the first to third embodiments and the modified examples 2 to 16, the protrusion 40 is projected from any one of the end cap 50, the protective plate 60, and the side seal 80. It is also possible to project the protrusions from two or more members.

Further, the number of protrusions is the protrusion 40 described in the first to third embodiments and the modifications 2 to 16.
Of course, the number is not limited. Next, a fourth embodiment will be described with reference to FIGS. 27 and 28. The same members and parts as those in the first embodiment are designated by the same reference numerals, and the duplicated description will be omitted. That is, in this embodiment, in the linear guide bearing device 1 equivalent to that of the first embodiment, the two protrusions 40d are formed on the lubricant containing member 70, and the protrusion 40d contains the lubricant. The left and right sleeves 72 of the member 70 project in the direction of the protective plate 60, and the end caps 50 and the protective plate 60 have through holes 51C and 61 corresponding to the protrusions 40d.
C is formed. 27 and 28, the description of the mounting screw and the through hole for the mounting screw is omitted. These through holes for mounting screws can be appropriately formed on the end cap 50, the protective plate 60, the lubricant containing member 70, and the side seal 80 depending on the shape and size conditions of the protrusion 40d.

Specifically, the end cap 50 is provided with through holes 51C in the left and right sleeve portions 52, into which projections 40d formed on a lubricant containing member 70 described later fit. Further, the protection plate 60 is a flat steel plate, and has an approximately U-shaped outer shape that is opened downward according to the outer shape of the end cap 50. A through hole 61C into which the protrusion 40d of the lubricant containing member 70 is fitted is provided in each sleeve portion 62 of the protective plate 60. The through hole 61C is used as the protective plate 60.
Is located at a position corresponding to the through hole 51C of the end cap 50 overlapped with.

Further, the lubricant-containing member 70 has a generally U-shaped outer shape that opens downward in conformity with the outer shape of the end cap 50, and the lubricant-containing member 70 is provided on both the rear surface side (the side close to the slider body 30). Cylindrical protrusions 40d each having a continuous circular cross section protrude from the sleeve portion 72 toward the end cap 50. The axial length of the protrusion 40d is approximately the thickness of the protective plate 60 plus half the thickness of the end cap 50. Protrusion 4
The diameter of the cylinder forming 0d is the same as the diameter of the through holes 51C and 61C, and is about one third of the width of the sleeve portion 72 in the left-right direction. In the sleeve 72, the protrusion 40d is the protrusion 7
It is located at a height approximately midway between 4A and the convex portion 74B, and the sleeve portion 72
The inner side of the sleeve 72 is located at about one third of the width of the sleeve 72 in the left-right direction. The distance between the two protrusions 40d when the external force is not applied to the lubricant-containing member 70 is slightly larger than the distance between the through holes 51C and the distance between 61C.

The end cap 50, the protective plate 60,
Through holes for mounting screws (not shown) are formed in the lubricant-containing member 70 and the side seals 80. Further, both side surfaces of the lubricant containing member 70 are compressed to reduce the distance between the protrusions 40d to a length corresponding to the distance between the two through holes 51C, and the through hole 61C and the end cap 50 of the protective plate 60 which are overlapped.
The projection 40d is fitted into the through hole 51C. Then, the end cap 50, the protective plate 60, the lubricant containing member 70, and the side seal 80 are stacked in this order, and the slider body 3
It is attached to the end surface of 0 with a mounting screw (not shown).

Further, as the projection 40d of the lubricant containing member 70 is pressed and applied with an urging force inward from the inner walls of the through holes 51C and 61C in a U-shape, the lubricant containing member 70 is guided by the guide rail. It always receives the force to be pushed to 10. In the sleeve portion 72, a urging force is applied inward from the inner walls of the through holes 51C and 61C in a U-shape. Other configurations are similar to those of the first embodiment described above.

Similar to the first embodiment, even if the inner surface of the U-shape of the lubricant containing member 70 is worn, the pressed lubricant containing member 70 is deformed and the lubricant containing member 70 is deformed.
Remains in close contact with the upper surface 11 and the side surface 12 of the guide rail 10 or at least the rolling element rolling grooves 14A and 14B. Further, the lubricant-containing member 7 is also attached to the guide rail 10 by the contracting force due to the self-contraction of the lubricant-containing member 70.
0 is in close contact with each other. That is, even if the linear guide bearing device 1 is driven for a long period of time, the lubricant is stably and automatically supplied to the rolling elements.

In the fourth embodiment, the projection 4
0d is projected from the back surface side of the lubricant containing member 70 toward the protective plate 60 to form the through holes 51C and 61C in the end cap 50 and the protective plate 60. Instead, the protrusion is provided on the outer surface of the lubricant containing member 70. It is also possible to project from the side (the side farther from the slider body 30) in the direction of the side seal 80, and to form a through hole in the side seal 80 that fits this projection.

In addition, the projections are provided in the direction of the protective plate 60 and the side seals 80 from the back surface side and the outer surface side of the lubricant containing member 70.
It is also possible to form through holes that protrude in both directions and that are fitted into these projections in the end cap 50, the protective plate 60, and the side seal 80, respectively. Furthermore, in the fourth embodiment, the protrusion 40d has a cylindrical shape, but it may have another shape such as a triangular prism or a quadrangular prism instead.

In the fourth embodiment, the projection 4
The length in which 0d protrudes in the axial direction is the dimension of the thickness of the protective plate 60 plus about half the thickness of the end cap 50, but the thickness of the end cap 50 is added to the thickness of the protective plate 60. Other lengths up to the dimension are possible. Further, although two protrusions 40d are formed in the fourth embodiment, it goes without saying that the number of protrusions is not limited to two.

Further, the protrusion in at least one of the first to third embodiments is formed on either the end cap, the protective plate or the side seal, and the protrusion in the fourth embodiment is used. Can be formed on the lubricant-containing member. Further, in each of the above-described embodiments and each modification, the rolling element in the slider 20 repeats rolling, moving and circulating in the rolling element circulation circuit, but the distance over which the slider moves relative to the guide rail is If it is small, the rolling elements do not circulate, so the rolling element circulation circuit is not required.

Although the slider 20 has the protective plate 60 as its constituent member in each of the second to fourth embodiments, it may be a slider having no protective plate. Further, in the first, second, or fourth embodiments and the modifications to these embodiments, the slider 20 has the side seal protection plate 80 as its constituent member, but does not have the side seal. It can also be a slider.

[0068]

Since the present invention is a linear guide bearing device as described above, it has the following effects. According to the invention of claim 1, the projection is integrally formed on the member forming the slider by the same material as the slider, and the projection applies a biasing force to the lubricant-containing member to press it. There is no need to use a separate component to generate it, and because this urging force deforms the lubricant-containing member and keeps it in constant contact with the guide rail, the lubricant-containing member rolls through the rolling element rolling groove. The lubricant is continuously supplied to the moving body. That is, the lubricant-containing member can be attached to the linear guide bearing device without increasing the number of components of the linear guide bearing device, and even if the linear guide bearing device is driven for a long period of time, the rolling element is not lubricated. There is an effect that it is possible to provide a linear guide bearing device that can be stably supplied.

According to the invention of claim 2, the projection for generating the biasing force in the invention of claim 1 is formed integrally with a member other than the lubricant-containing member by the same material as this.
The protrusion applies the biasing force to the lubricant-containing member. That is, the lubricant-containing member can be attached to the linear guide bearing device without increasing the number of components of the linear guide bearing device, and even if the linear guide bearing device is driven for a long period of time, the rolling element is not lubricated. There is an effect that it is possible to provide a linear guide bearing device that can be stably supplied.

According to a third aspect of the present invention, the protrusion of the first aspect of the invention is integrally formed on the lubricant-containing member with the same material as the lubricant-containing member, and the through hole fitted with the protrusion constitutes another slider. Is formed on the member containing the lubricant, and the biasing force is applied to the lubricant-containing member from the through hole through the protrusion. That is, the lubricant-containing member can be attached to the linear guide bearing device without increasing the number of components of the linear guide bearing device, and even if the linear guide bearing device is driven for a long period of time, the rolling element is not lubricated. There is an effect that it is possible to provide a linear guide bearing device that can be stably supplied.

[Brief description of drawings]

FIG. 1 is a perspective view of a linear motion guide bearing device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a mounting state of each member at the slider end portion according to the first embodiment.

FIG. 3 is a partial side view of the linear guide bearing device according to the first embodiment.

FIG. 4 is a vertical sectional view taken along the line AA of the linear guide bearing device of FIG.

FIG. 5 is a perspective view showing a modified example 1 of the shape of the lubricant containing member according to the first embodiment.

FIG. 6 is a perspective view showing a mounting state of each member at an end portion of a slider according to a second embodiment.

FIG. 7 is a partial side view of the linear guide bearing device according to the second embodiment.

8 is a vertical cross-sectional view of the linear guide bearing device of FIG. 7 taken along the line BB.

FIG. 9 is a perspective view showing a mounting state of each member at an end portion of a slider according to a third embodiment.

FIG. 10 is a partial side view of a linear guide bearing device according to a third embodiment.

11 is a vertical cross-sectional view taken along line CC of the linear guide bearing device of FIG.

FIG. 12 is an external view of a lubricant-containing member in which a description of a through hole for a mounting screw is omitted, showing a second modification.

FIG. 13 is an external view of a lubricant-containing member in which modification of a through hole for a mounting screw is omitted, showing a third modification.

FIG. 14 is an outer surface view of a lubricant-containing member in which a description of a through hole for a mounting screw is omitted, showing a fourth modification.

FIG. 15 is an external view of a lubricant-containing member in which a description of a through hole for a mounting screw is omitted, showing a modified example 5.

FIG. 16 is an external view of a lubricant-containing member in which modification of a through hole for a mounting screw is omitted, showing a sixth modification.

FIG. 17 is an external view of a lubricant-containing member in which a description of a through hole for a mounting screw is omitted, showing a modified example 7.

FIG. 18 is an external view of a lubricant-containing member in which a description of a through hole for a mounting screw is omitted, showing a modified example 8;

FIG. 19 is an external view of a lubricant-containing member, in which a description of a through hole for a mounting screw is omitted, showing a modified example 9;

FIG. 20 is an external view of a lubricant-containing member in which a description of a through hole for a mounting screw is omitted, showing a modified example 10.

FIG. 21 is an external view of a lubricant-containing member in which a description of a through hole for a mounting screw is omitted, showing a modified example 11.

FIG. 22 is an external view of a lubricant-containing member in which a description of a through hole for a mounting screw is omitted, showing a modified example 12;

FIG. 23 is an external view of a lubricant-containing member in which modification of a through hole for a mounting screw is omitted, showing a modification 13;

FIG. 24 is an external view of a lubricant-containing member in which modification of a through hole for a mounting screw is omitted, showing Modification Example 14;

FIG. 25 is an external view of a lubricant-containing member in which a description of a through hole for a mounting screw is omitted, showing a modified example 15.

FIG. 26 is an external view of a lubricant-containing member in which a description of a through hole for a mounting screw is omitted, showing a modified example 16;

FIG. 27 is a perspective view of the back surface of the lubricant containing member at the end portion of the linear guide bearing device according to the fourth embodiment as viewed from the protective plate side.

FIG. 28 is a partial side view of the slider according to the fourth embodiment.

[Explanation of symbols]

1 Linear motion guide bearing device 10 Guide rail 11 upper surface 12 sides 14 Rolling element rolling groove 15 Cage escape groove 20 sliders 30 slider body 32 grease nipple 36 mounting screws 40 protrusions 42 cutout 50 end cap 51 through hole 52 Sleeve 53 Connection 60 Protective plate 61 through hole 62 sleeves 63 Connection 70 Lubricant-containing member 71 Through hole 72 Sleeve 73 Connection 74 Convex part 80 side seal 81 through hole 82 Sleeve 83 Connection 84 Lip

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3J101 AA01 AA42 AA52 AA62 AA82                       CA12 EA64 EA72 FA11 FA32                       FA35 GA01 GA24                 3J104 AA03 AA22 AA34 AA65 AA69                       AA74 BA61 DA05 DA16

Claims (3)

[Claims] 1. A slider is loosely fitted to a guide rail that has a rolling element rolling groove on the outer surface and extends in the axial direction, and the slider is moved relative to the guide rail between the guide rail and the slider. In a linear motion guide bearing device in which a large number of rolling elements are loaded and the slider includes a deformable lubricant-containing member, the lubricant-containing member is deformed and pressed so as to be pushed out to the guide rail side. A protrusion is formed integrally with a member that constitutes the slider including the lubricant-containing member by the same material as that of the slider, and the lubricant-containing member is pressed and biased toward the guide rail by the protrusion. Dynamic guide bearing device. 2. The protrusion is formed integrally with a member forming the slider except the lubricant-containing member by the same material as that of the slider, and the lubricant-containing member is at least partially compressed and reduced to form the slider. The linear guide bearing device according to claim 1, wherein the linear guide bearing device is sandwiched in a space formed between the protrusion and the guide rail. 3. The lubricant-containing member is integrally formed with the protrusion by the same material as that of the lubricant-containing member, and a hole for fitting with the protrusion is formed in a member forming the slider except the lubricant-containing member. The projection is fitted into the hole in a state in which the lubricant-containing member is at least partially compressed and reduced due to a difference in position or size between the projection and the hole. The linear guide bearing device described.