JP3490385B2 - Guide device lubrication device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is incorporated in a guide device such as a linear guide device, and a minimum amount of lubricating oil is applied to a sliding surface between a guide body and a moving body which relatively reciprocate. The present invention relates to a lubricating device that can be supplied in proportion to movement.

[0002]

2. Description of the Related Art As shown in FIG. 9, a linear guide device 1 of this type includes a guide rail 2 and a movable body 3 which is movably attached to the guide rail 2 and moves along the guide rail 2.
Have and. The guide rail 2 has rolling grooves 4 extending in the longitudinal direction on both sides of the upper surface and upper portions of both sides. The moving body 3 has a main body 5 and end caps 6 and 6 fixed to both ends of the main body 5. A track corresponding to the rolling groove 4 provided in the guide rail 2 is formed in the moving body 3, and a ball bearing row is arranged on each track so as to move along the rolling groove 4.

That is, a groove 7 forming a load track and a groove 8 forming a return track as shown in FIG. 1 are formed in the main body 3a of the moving body 3, and each end cap 6 of the moving body 3 is formed.
The groove 7 forming the load track formed in the main body 3a.
And a connecting track 9 for connecting the groove 8 forming the return track. Therefore, when the main body 5 and the end caps 6 and 6 are coupled, four endless tracks are formed in the moving body 3. A large number of ball bearings 10 are arranged in rows on each endless track.

Further, one end cap 6 of the linear guide device 1 is provided with a lubricating device for supplying lubricating oil to a sliding surface between each rolling groove 4 of the guide rail 2 and the ball bearing 10 of the moving body 3. 11 is attached.

The lubricating device 11 comprises a lubricating oil occlusion body 12 made of a porous resin containing lubricating oil, side seals 13 surrounding the lubricating oil occlusion body 12 and a protective plate 14. , Guide rail 2 for lubricating oil occlusion body 12
The lubricating oil contained in the lubricating oil occlusion body 12 is supplied to the sliding surface between the guide rail 2 and the moving body 3 by slidingly contacting the sliding surface between the rolling groove 4 and the ball bearing 10 of the moving body 3. I am trying to do it.

[0006]

SUMMARY OF THE INVENTION In the above-mentioned lubrication device, the lubricating oil occlusion body is slidably in contact with the sliding surface of the guide rail and the moving body so that the lubrication oil contained in the porous resin constituting the lubricating oil occlusion body is lubricated. Oil is supplied to the sliding surface between the guide rail and the moving body, and the amount of lubricating oil supplied changes due to the contact pressure between the lubricating oil storage body and the guide rail. The contact pressure between the guide rail and the moving body also decreases as the guide rail and the moving body wear.

In the above-mentioned lubricating device, when a large amount of lubricating oil is stored in the lubricating oil storage body, a large amount of lubricating oil is supplied to the sliding surface between the guide rail and the moving body, so that the oil storage body and the guide rail are not in contact with each other. If the contact pressure is low, a small amount of lubricating oil is supplied, and the amount of lubricating oil supplied cannot be controlled.Therefore, the lubricating oil stored in the lubricating oil storage body slides on the sliding surface between the guide rail and the moving body. There is a problem that it cannot be supplied in proportion to the distance.

The present invention has been made in view of the above points, and an object thereof is to provide a lubricating device capable of supplying a minimum amount of lubricating oil to a sliding surface between a guide body and a moving body in proportion to relative movement. And

[0009]

A lubricating device for a guide device according to the present invention comprises a case fixed to a moving body such that an open end of the guide device is close to a sliding surface of the guide body, and one end of the sliding surface of the guide body. A flexible sliding body that is supported in the case so as to be in sliding contact with the case and divides the case into two chambers; and a lubricating oil storage body that is arranged in one chamber of the case and that supplies lubricating oil to the sliding surface of the guide body. A sealing piece having one end fixed to the sliding surface of the guide body on the wall surface of the chamber in which the lubricating oil storage body is arranged in the case,
The flexible sliding body has a chamber in which the lubricating oil occlusion body is arranged and a passage communicating with another chamber.

[0010]

[0011] The lubricating device of the guiding device of the present invention, a bifurcated lip portion is provided at one end of the variable <br/> FLEXIBLE sliding body, only towards one of the lip to the lubricating oil storing member-side chamber and the other It is possible to direct the lip of the other chamber to another chamber, or to provide a check valve between the lubricating oil tank and the lubricating device.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the same members as those in FIG. 6 are designated by the same reference numerals.

FIG. 1 is a perspective view of a linear guide device 1 equipped with a lubrication device 20 according to a first embodiment of the present invention. As shown in FIG. 2, the lubrication device 20 has a lower opening case. 21 and a flexible sliding body 22 arranged inside the case 21.

The flexible slide body 22 has two chambers 23, 2 in the inner space of the case 21 in the movement direction of the linear guide device 1.
It is divided into four. In the chamber 23 defined by the side wall 25 of the case 21 and the flexible sliding body 22, a lubricating oil occlusion body 27 is arranged in contact with the side wall 25 and the sealing piece 26 and the flexible sliding body 22. Further, the side wall 25 of the case 21 is provided with an oil supply hole 28 and a mounting portion 29. The oil supply device 3 shown in FIG.
0 is connected.

The flexible sliding member 22 is a plate-shaped member made of natural rubber, synthetic rubber or elastic plastic and having an L-shaped cross section. Two sliding pieces 22a are formed in correspondence with. In the flexible sliding body 22, the short side portion 22b is fixed to the inner upper wall of the case 21 so that the long side portion is positioned in the vertical direction.

That is, the flexible sliding body 22 is attached to the case 21.
When fixed to the inside of the sliding piece 22a, the lower end 22c of each sliding piece 22a makes a loose sliding contact with the sliding surface 36 of the guide rail 2.
Moves between the position shown in FIG. 4 and the position shown in FIG. 5 with the relative movement of the guide body 2 and the moving body 3.

The sliding piece 22a has the same cross-sectional shape as the long side portion in FIG. 1, but may have an edge shape with a thin tip.

The refueling device 30, as shown in FIG.
Connector 32 having check valve 31 and lubricating oil tank 3
3, the pipe 3 for connecting the connecting tool 32 and the lubricating oil tank 33
4 and. The lubricating oil tank 33 stores a predetermined amount of lubricating oil 35. Side wall 2 of connector 32 and case 21
The mounting portion 29 provided on the member 5 is sealingly connected by screw means. The check valve 31 has a lubricating oil passage formed therein, and when the lubricating device 20 side has a negative pressure due to the movement of the flexible sliding body 22, the lubricating oil passage opens and is stored in the lubricating oil tank 33. The lubricating oil 35 is sent to the case 21. Further, when the lubricating device 20 side has a positive pressure due to the movement of the flexible sliding body 22, the lubricating oil passage is closed, and the lubricating oil 35 stored in the lubricating oil tank 33 is not sent to the case 21.

The seal piece 26 is a plate-like body made of natural rubber or synthetic rubber and has an opening 37. The seal piece 26 is
The opening 37 is aligned with the oil supply hole 28 formed in the side wall 25 of the case 21, and the lower end surface is arranged so as to be in sliding contact with the sliding surface 36 of the guide rail 2.

The lubricating oil occlusion body 27 is made of felt or sponge as a material and has a characteristic of occlusion of lubricating oil. Materials other than the above materials can be applied as long as they have such characteristics. The lubricating oil occlusion body 27 is arranged such that the lower end surface of the lubricating oil occlusion body 27 is in loose contact with the sliding surface 36 of the guide rail 2.

Therefore, in order to incorporate the lubricating device 20 into the moving body 3 of the linear guide device 1, the end cap 6 of the linear guide device 1 is provided with a recess 40 for accommodating the case 21. The case 21 is arranged. Flexible sliding body 22 and seal piece 2 arranged inside case 21
The position of 6 is adjusted so as to be in sliding contact with the sliding surface 36 of the guide rail 2. The case 21 is fixed to the end cap 6 via a fixture 41 and a bolt 42. Case 2
The oil supply device 3 is attached to the attachment portion 29 provided on the side wall 25 of the first embodiment.
A coupling 32 with a zero check valve 31 is mounted in a sealing connection by means of screws.

Next, the operation of the lubricating device according to the present invention will be described.

The sliding member 22a of the lubricating device 20 is provided with two sliding pieces 22a.
Since a has the same configuration, only one sliding piece 22a will be described.

The lubricating device 20 incorporated in the moving body 3 is
In the rest position shown in FIG. 2, the flexible sliding body 22 that slides on the sliding surface of the guide body 2 is in a state of loosely contacting the side surface of the lubricating oil storage body 27, and the flexible sliding body 22 is lubricated. Since the oil occlusion body 27 is not pressed, the lubricating oil occlusion body 27 maintains the state of occlusion of a large amount of the lubricating oil 35.

Next, when the moving body 3 moves along the guide body 2 in the direction of arrow A in FIG. 2, the sliding piece 22a of the flexible sliding body 22 provided in the lubricating device 20 slides on the guide body 2. Face 36
4 and is deformed in the direction of approaching the lubricating oil storage body 27 by the frictional force generated between the sliding surface 36 of the guide body 2 as shown in FIG.

When the sliding piece 22a of the flexible sliding body 22 is deformed in the direction of approaching the lubricating oil occlusion body 27, the sliding piece 22a.
The surface of the lubricating oil occlusion body 27 presses against the surface of the lubricating oil occlusion body 27.
The lubricating oil 35 stored in 7 is supplied by a minimum amount proportional to the momentum of the moving body 3 moving along the sliding surface 36 of the guide body 2.

Next, when the moving body 3 reaches the end position where it moves along the guide body 2 and the moving body 3 reverses at the end position and moves in the direction indicated by the arrow B in FIG. As shown in FIG. 5, the sliding piece 22 a of the flexible sliding body 22 that slides on the sliding surface 36 is removed from the lubricating oil storage body 27 by the frictional force generated between the sliding piece 22 a and the sliding surface 36 of the guide body 2. The sliding piece 22a of the flexible sliding body 22 and the lubricating oil occlusion body 2 are deformed in the separating direction.
A gap is formed between the lubricating oil occlusion body 27 and the space 7, and the space 23 accommodating the lubricating oil occlusion body 27 becomes large.

When the space 23 becomes large, the space 23 becomes a negative pressure, and the lubricating oil 35 contained in the lubricating oil tank 33 enters the lubricating oil occlusion body in the space 23 accommodating the lubricating oil occlusion body 27 via the check valve 31. 27 is replenished by an amount corresponding to the amount supplied to the sliding surface 36 of the guide body 2.

In the above-mentioned embodiment, the supply of the lubricating oil to the sliding surface 36 formed on the upper surface of the guide body 2 has been described. However, the lubricating oil is supplied to the sliding surface formed on the side surface of the guide body 2. Is also the same.

In the above embodiment, the lubricating device 20 is arranged on one end cap 6 of the moving body 3, but the lubricating device 20 may be arranged on both end caps 6 and 6, respectively. Further, in the above embodiment, the guide body 2 is fixed and the moving body 3 is moved.
Both the mobile unit 3 and the mobile unit 3 may be moved. Also,
The lubrication device can be used by incorporating it into a curved guide device, a spline, or a ball bush.

FIG. 6 shows a lubricating device 20a according to a second embodiment of the present invention. The lubricating device 20a differs from the lubricating device 20 only in the structure of the flexible sliding body 122. Only the flexible sliding body 122 will be described, and description of other members will be omitted.

Like the flexible slide body 22, the flexible slide body 122 is a plate-like body made of natural rubber, synthetic rubber or elastic plastic and having an L-shaped cross section. Two sliding pieces 122a are formed corresponding to the guide grooves 4 and 4 of the guide rail 2.

Each sliding piece 122a is, as shown in FIG.
Two-forked lip parts 123a and 123b with an inverted Y shape at the bottom
And a passage 125 that connects the two chambers to each other in the middle.

Bifurcated lip portion 1 provided on the sliding piece 122a
One of the lip portions 123a of 23a and 123b is
The direction toward the chamber 23 in which the lubricating oil occlusion body 27 is disposed is directed, and the other lip portion 123b is directed toward the other chamber 24. The lip portion 123a comes into close contact with the sliding surface 36 of the guide rail 2 when the lower end portion of the flexible sliding body 122 is deformed toward the lubricating oil occlusion body 27 side, and the lip portion 123b forms the guide rail 2
The state of being in close contact with the sliding surface 36 is maintained.

The passage 125 provided in the sliding piece 122a has a conical cross section having an opening on the side of the chamber 23 in which the lubricating oil occlusion body 27 is arranged, and has a slit 126 at the bottom 126 of the passage 125.
a is formed. The bottom 126 has a slit 126a.
A convex portion is provided to open and close the. The slit 126a of the passage 125 opens when the pressure in the chamber 23 rises,
The lubricating oil 35 is supplied from the chamber 23 to the chamber 24, that is, the moving body 3 side. In addition, the slit 126 a of the passage 125 is provided in the chamber 2
When the pressure of 3 does not rise, it is in a closed state, and the lubricating oil 35 supplied to the moving body 3 side does not return to the chamber 23.

Then, the flexible sliding body 122 is attached to the case 2
When fixed inside 1, the bifurcated lip portions 123a and 123b of each sliding piece 122a are connected to the sliding surface 36 of the guide rail 2.
Slidably in contact with the guide body 2 and the moving body 3
7 is moved between the position shown in FIG. 7 and the position shown in FIG.

As shown in FIG. 7, when the lower end portion of the flexible sliding body 122 is deformed toward the lubricating oil occlusion body 27, one lip portion 123a of the sliding piece 122a slides on the guide rail 2. It is in close contact with the surface 36, whereby the pressure in the chamber 23 rises, and the bottom 126 of the passage 125 that connects the two chambers 23, 24
The slit 126 is opened, and the lubricating oil 35 is injected into the chamber 24 from the chamber 23 through the passage 125. In this case, room 24
In order to prevent the lubricating oil 35 injected into
The other lip portion 123b of 22a maintains a state of being in close contact with the sliding surface 36 of the guide rail 2.

As shown in FIG. 8, when the lower end portion of the flexible sliding body 122 is deformed to the side opposite to the lubricating oil occlusion body 27,
The other lip portion 123b of the sliding piece 122a comes into close contact with the sliding surface 36 of the guide rail 2 and the pressure in the chamber 23 decreases, so the bottom portion 126 of the passage 125 that connects the two chambers 23, 24 together.
The slit 126 of the chamber is closed, and the lubricating oil 35 flows from the chamber 23 to the chamber 2.
Not injected into 4. In this case, since the pressure in the chamber 23 is decreased, the check valve 31 is opened and the lubricating oil 35 is supplied to the chamber 24 from the lubricating oil tank 33 arranged outside. At this time, the other lip portion 123b of the sliding piece 122a maintains the state in which it is in close contact with the sliding surface 36 of the guide rail 2 so that the lubricating oil 35 supplied to the moving body 3 side does not flow away.

[0039]

As described above, according to the present invention, a minimum amount of lubricating oil can be supplied to the sliding surface of the guide body in proportion to the relative movement of the moving body and the guide body. The consumption of lubricating oil is reduced, and the wear of frictional parts is also reduced, so that the service life is extended.

[Brief description of drawings]

1 is a perspective view of a linear guide device equipped with a lubricating device according to the present invention.

FIG. 2 is a partial sectional view of a lubricating device for a guide device according to the present invention.

FIG. 3 is a view showing an oil supply device of a lubrication device for a guide device according to the present invention.

FIG. 4 is a view showing an oil supply position of a lubricating device of the guide device shown in FIG.

5 is a diagram showing a replenishment position of a lubricating device of the guide device shown in FIG.

FIG. 6 is a partial sectional view of another embodiment of the lubricating device for the guide device according to the present invention.

FIG. 7 is a diagram showing an oil supply position of a lubricating device of the guide device shown in FIG.

8 is a diagram showing a replenishment position of a lubricating device of the guide device shown in FIG.

FIG. 9 is a diagram showing a conventional guide device lubrication device.

[Explanation of symbols]

1 Straight guide device 2 guide rails 3 moving bodies 20 Lubricator 21 cases 22 Flexible sliding body 25 side wall 27 Lubricating oil storage 30 Refueling device 31 Check valve 33 Lubricating oil tank 35 Lubricating oil 36 Sliding surface

Continuation of front page (56) Reference JP-A-11-344030 (JP, A) JP-A-10-96420 (JP, A) JP-A-2000-35038 (JP, A) JP-A-11-2243 (JP, A) A) JP 10-227311 (JP, A) JP 11-287245 (JP, A) JP 2000-110833 (JP, A) Actual flat 6-51549 (JP, U) Special table 7- 501871 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F16C 29/06 F16C 33/66

Claims (4)

(57) [Claims] 1. A lubricating device for supplying lubricating oil to a sliding surface between a guide body and a moving body of a guide device, wherein the lubricating device is moved so that an opening end thereof is close to the sliding surface of the guide body. A case fixed to the body, a flexible slide body that is supported in the case so that one end of the case is in sliding contact with the sliding surface of the guide body, and divides the case into two chambers, and lubrication is provided in one chamber of the case. A lubricating oil occlusion body that supplies oil to the sliding surface of the guide body, and a seal piece fixed to the wall surface of the chamber in the case where the lubricating oil occlusion body is arranged so that one end is in sliding contact with the sliding surface of the guide body. And a flexible sliding body having a passage that connects the chamber in which the lubricating oil storage body is arranged and the other chamber. 2. The flexible sliding body has a bifurcated lip portion at one end, and one lip portion faces the chamber in which the lubricating oil occlusion body is arranged, and the other lip portion faces the other chamber. The lubricating device according to claim 1, wherein the lubricating device is provided. 3. An oil supply device, one end of which is connected to the case and the other end of which is connected to a lubricating oil tank, is provided.
Lubrication device according to. 4. The lubricating device according to claim 3, further comprising a check valve provided between the lubricating oil tank and the lubricating device.