JP5803235B2 - Lubricant supply body for linear guide device, linear guide device - Google Patents

Description

  The present invention relates to a lubricant supply body for a linear guide device and a linear guide device including the same.

The linear guide device includes a guide rail, a slider, and a plurality of rolling elements, and the guide rail and the slider have rolling surfaces that are arranged to face each other to form a rolling passage of the rolling element, One of the guide rail and the slider linearly moves relative to the other when the rolling element rolls in the rolling path.
Conventionally, proposals have been made to enable a lubricant to be stably supplied to a linear guide device over a long period of time.

  In Patent Document 1, as a lubricant supply body fixed to the end portion in the moving direction of the slider constituting the linear guide device, at least a part of the outer part is in contact with the lubrication part, and the inner part of the outer part is provided. A lubricant holding layer disposed in the recess, and the outer portion is made of a lubricant-containing polymer (a synthetic resin solidified in a state containing a lubricating oil), and the lubricant holding layer is made of grease, or There is described a needle felt made of a replenishable synthetic resin that has absorbed grease or lubricating oil.

JP 2004-36814 A

However, the lubricant supply body described in Patent Document 1 has a problem that the lubricant flows wastefully from a portion other than the lubrication portion of the outer portion made of the lubricant-containing polymer.
An object of the present invention is to provide a lubricant supply body for a linear guide device that can prevent the lubricant from flowing wastefully and can efficiently maintain a long-term stable lubrication state of the linear guide device. It is.

  In order to solve the above problems, a lubricant supply body for a linear guide device according to the present invention includes a guide rail, a slider, and a plurality of rolling elements, and the guide rail and the slider are arranged to face each other. A linear guide device having a rolling surface that forms a rolling path of a rolling element, and one of the guide rail and the slider linearly moves relative to the other when the rolling element rolls in the rolling path. A lubricant supply body fixed to an end portion of the slider in the moving direction, wherein a lubricant is sealed inside and a mounting portion to the slider is provided, and a base end portion is disposed in the case And a lubricant-containing polymer molded body having a tip that is in contact with the guide rail exposed from the case.

  According to the lubricant supply body of the present invention, the tip end portion that is brought into contact with the guide rail of the lubricant-containing polymer molded body is exposed from the case, and the base end portion is disposed in the case. It is supplied only to the surface to be lubricated and can be prevented from flowing out wastefully. Further, since the lubricant in the case is supplied to the base end portion of the lubricant-containing polymer molded body, stable lubrication by the lubricant-containing polymer molded body lasts for a long time.

When the lubricant supply port is formed in the case, by supplying the lubricant into the case from the lubricant supply port, the lubricant-containing polymer molded body can be used without removing the lubricant supply body from the slider. The period during which stable lubrication can be sustained can be extended.
In addition, when at least a part of the side or upper surface of the case is transparent, it is easy to check the remaining amount of the lubricant in the case when the case is attached to the linear guide device. Can know.

  According to the lubricant supply body for a linear guide device of the present invention, since the lubricant can be prevented from flowing out unnecessarily, a stable lubrication state for a long period of time of the linear guide device can be efficiently maintained.

It is a perspective view which shows the linear guide apparatus of embodiment. It is a perspective view explaining the method to attach the lubricant supply body of this embodiment to the main body of a slider. It is a front view which shows the lubricant supply body of this embodiment. It is an AA cross-sectional enlarged view of FIG.

Embodiments of the present invention will be described below.
FIG. 1 is a perspective view showing the linear guide device of this embodiment. FIG. 2 is a perspective view for explaining a method of attaching the lubricant supply body to the main body of the slider.
As shown in FIG. 1, the linear guide device of this embodiment includes a guide rail 1, a slider 2, a ball (not shown) (rolling element), and a grease nipple 3. The slider 2 includes a main body 2A, an end cap 2B, a lubricant supply body 11, a side seal 10, and a bolt 21a. The end cap 2B, the lubricant supply body 11, and the side seal 10 are attached to the main body 2A of the slider 2 from the main body side by the bolt 21a.

  The ball grooves (track surfaces) 31 and 32 of the guide rail 1 and the ball grooves (track surfaces) (not shown) of the slider 2 form a rolling passage where the ball rolls under a load, and an end point of the rolling passage. A direction changing path is formed in the end cap 2B to move the ball from the first to the return path provided in the main body 2A. A lubricant supply body 11 is disposed between the end cap 2B and the side seal 10.

  As shown in FIG. 2, the side seal 10 is composed of a substantially U-shaped steel plate matched to the outer shape of the end cap 2B and a nitrile rubber plate integrated therewith. The shape of the nitrile rubber plate is such that the protruding portion 10a that is in sliding contact with the ball groove 31 formed on the side surface 1b of the guide rail 1, the protruding portion 10b that is in sliding contact with the ball groove 32 formed in the corner portion of the guide rail 1, and the guide A portion 10c that is in sliding contact with the upper surface 1a of the rail 1 is integrated. The side seal 10 is also formed with a through hole 10d through which the bolt 21a passes and a through hole 10e through which the grease nipple 3 passes.

  The lubricant supply body 11 is a substantially U-shaped member that matches the outer shape of the side seal 10, and includes a protruding portion 11 a that is in sliding contact with the ball groove 31 formed on the side surface 1 b of the guide rail 1, and the guide rail 1. A protrusion 11b slidably in contact with the ball groove 32 formed in the corner, a flat portion 11c slidably in contact with the upper surface 1a of the guide rail 1, a through hole 11d having an open side surface, and a through hole 11e having an upper surface opened. Have

As shown in FIGS. 3 and 4, the lubricant supply body 11 includes a lubricant-containing polymer molded body 4, a case 5, a felt 6, a bolt 7, and a nut 8.
The case 5 includes substantially U-shaped split bodies 51 and 52 that are divided into two in the thickness direction, and bent portions 51a and 52a are formed on the entire inner edge of the U-shape. A through hole 11 d having an open side surface and a through hole 11 e having an open top surface are formed in the case 5. The case 5 is transparent at least on either the side surface or the upper surface.

  Further, a lubricant supply port 53 is formed on the side surface of the case 5, and the lubricant supply port 53 is closed with a plug 54. A through hole 51 b and a recess 51 c that penetrate the plate surface are formed slightly outside the inner edge of the divided body 51. The nut 8 is fixed to the recess 51c. A through hole 52b penetrating the plate surface and a recess 52c for arranging the head of the bolt 7 are formed slightly outside the inner edge of the divided body 52.

  The lubricant-containing polymer molded body 4 has a substantially U-shaped plate shape and includes protrusions 11a and 11b and a flat surface portion 11c inside the U-shape, and is substantially U-shaped outside these portions. The groove 41 is formed. The bent portions 51 a and 52 a of the case 5 are fitted in the groove 41. Therefore, the distal end portion 42 on the inner side (guide rail 1 side) than the groove 41 is exposed from the case 5, and the base end portion 43 on the outer side of the groove 41 is disposed in the case 5. A through hole 44 through which the bolt 7 is passed is formed in the base end portion 43 of the lubricant-containing polymer molded body 4.

The lubricant-containing polymer molded body 4 is a porous synthetic resin molded body containing a lubricant. Synthetic resins that can be used include polyethylene, polypropylene, polybutylene, and polymethylpentene. Lubricants include paraffinic hydrocarbon oils such as poly α-olefin oils, naphthenic hydrocarbon oils, mineral oils, and dialkyldiphenyl ethers. Examples include ether oils such as oils and ester oils such as phthalate esters. The lubricant-containing polymer molded body 4 is injection-molded by adding any one of the above-described lubricants to the above-described synthetic resin, or by adding a plurality of types and adding various additives as necessary. Can be produced.
The felt 6 has a substantially U-shaped plate shape and is disposed outside the lubricant-containing polymer molded body 4 in the case 5. The felt 6 is impregnated with a lubricant.

When assembling the lubricant supply body 11, for example, first, the felt 6 and the lubricant-containing polymer molded body 4 are put in the divided body 51, and the bent portion 51 a is fitted in the groove 41, and then bent in the groove 41 on the opposite side. The part 52a is fitted and the division body 52 is covered. Next, the bolt 7 is inserted from the through hole 52 b of the divided body 52 and screwed into the nut 8 through the through hole 44 of the lubricant-containing polymer molded body 4 and the through hole 51 b of the divided body 51.
The through holes through which the bolts 21a of the lubricant supply body 11 are passed are formed by fitting the sleeves 11A and 11B into the through holes 11d whose side surfaces are opened. The through hole through which the grease nipple 3 passes is formed by fitting the sleeve 11C into the through hole 11e whose upper surface is opened.

  The lengths of these sleeves 11A, 11B, and 11C are slightly longer than the thickness of the lubricant supply body 11, and are not compressed by being compressed in the axial direction by tightening the bolt 21a during assembly. ing. The outer diameters of the sleeves 11A, 11B, and 11C are larger than the diameters of the through holes 11d and 11e, whereby the projecting portions 11a and 11b can be pressed against the ball grooves 31 and 32 and the portions 11c can be brought into close contact with each other. Can be pressed against the upper surface 1a.

When the slider 2 is assembled, the bolt 21a is inserted into the through hole 10d of the side seal 10, the through holes (sleeves fitted in the through holes 21d) 11A and 11B of the lubricant supply body 11, and the through holes 23a of the end cap 2B. The tip is screwed into the main body 2A.
According to the linear guide device of this embodiment, the distal end portion 42 that makes the lubricant supply body 11 contact the guide rail 1 of the lubricant-containing polymer molded body 4 is exposed from the case 5, and the base end portion 43 is in the case 5. Therefore, the lubricant is supplied only to the upper surface and side surfaces (surfaces to be lubricated) 1a and 1b of the guide rail 1 and can be prevented from flowing out wastefully. Further, since the lubricant in the case 5 is supplied to the base end portion 43 of the lubricant-containing polymer molded body 4, stable lubrication by the lubricant-containing polymer molded body 4 lasts for a long time.

Further, since the lubricant supply port 53 is formed in the case 5, the lubricant supply body 11 can be supplied from the lubricant supply port 53 into the case 5 without removing the lubricant supply body 11 from the slider 2. The period during which stable lubrication by the lubricant-containing polymer molded body 4 is sustained can be extended.
In addition, since at least a part of the side surface and the upper surface of the case 5 is transparent, it is easy to check the remaining amount of the lubricant in the case 5 when attached to the linear guide device. It is easy to know.

In this embodiment, the felt 6 impregnated with the lubricant is disposed in the case 5, but only the lubricant may be enclosed without disposing the felt 6 in the case 5.
The present invention can also be applied to the case of a lubricant supply body for a linear guide device provided with rollers as rolling elements, and linear surfaces having a pair of two or three to six rows of raceways instead of two to four rows. Of course, it can also be applied to a guide device.

DESCRIPTION OF SYMBOLS 1 Guide rail 1a Top surface of guide rail 1b Side surface of guide rail 10 Side seal (plate-shaped member)
10d, 11d, 23a Through-holes through which bolts pass 10e, 11C, 23c Through-holes through which grease nipples pass 11A, 11B, 11C Sleeve 11 Lubricant supply body 11a Protruding part 11b Protruding part 11c Flat part 2 Slider 2A Body 2B End cap 21a Bolt 3 Grease nipple 31, 32 Ball groove (track surface)
4 Lubricant-containing polymer molded body 41 Groove 42 Tip portion 43 Base end portion 44 Through hole 5 Case 51, 52 Split body 51a, 52a Bending portion 53 Lubricant supply port 54 Lubricant supply port plug 51b Through hole 51c Recessed portion 52b Through Hole 52c Recess 6 Felt 7 Bolt 8 Nut

Claims (4)

A guide rail, a slider, and a plurality of rolling elements, wherein the guide rail and the slider have rolling surfaces that are arranged to face each other and form a rolling path of the rolling element, A lubricant supply body fixed to an end portion in the moving direction of the slider constituting a linear guide device in which one of the guide rail and the slider moves linearly relative to the other when the rolling element rolls. ,
A case in which a felt impregnated with a lubricant is disposed inside and has a mounting portion to the slider;
A lubricant-containing polymer molded body in which a proximal end portion is disposed in the case and a distal end portion to be in contact with the guide rail is exposed from the case;
Have
The case includes a substantially U-shaped divided body that is divided into two in the thickness direction, and the divided body includes a side plate, an upper surface plate, and a lower surface plate that form an outer edge portion, and a U-shaped inner edge. A bent portion is formed in the entire portion, and the bent portion is opposed to the side plate and the top plate in parallel,
The mounting portion is a through hole that penetrates the two divided bodies in the thickness direction, and is an upper portion that is disposed on the upper side of the upper surface of the guide rail and a side that is disposed on the outer side of the side surface of the guide rail. Formed in a portion, the upper portion of the through hole is opened at the top surface, the side portion of the through hole is opened at the side surface ,
The two divided bodies have a recess that opens to a plate surface that is an outer surface of the case on the outer side of the bent portion of the inner edge, and a smaller diameter than the recess that continuously penetrates the recess and penetrates in the plate thickness direction. A nut is fixed to the concave portion of one of the divided bodies,
The lubricant-containing polymer molded body has a substantially U-shaped plate shape, and a substantially U-shaped groove in which a bent portion of the divided body is fitted to the outside of the tip portion of each plate surface is formed. A through hole penetrating in the thickness direction is formed in the base end portion,
The felt is a substantially U-shaped plate, and is disposed outside the lubricant-containing polymer molded body in the case.
The bent portion of each divided body is fitted in the groove on each plate surface of the lubricant-containing polymer molded body, and a bolt inserted from the concave portion of the other divided body is formed on the lubricant-containing polymer molded body. The lubricant-containing polymer molded body is fixed to the case by being screwed into the nut of one of the divided bodies through the through hole, and the head of the bolt is the concave portion of the other divided body. linear guide device for the lubricant supply member, characterized that you have arranged.   The lubricant supply body for a linear guide device according to claim 1, wherein a lubricant supply port is formed in the case.   The lubricant supply body for a linear guide device according to claim 1, wherein at least a part of an upper surface or a side surface of the case is transparent. A guide rail, a slider, and a plurality of rolling elements, wherein the guide rail and the slider have rolling surfaces that are arranged to face each other and form a rolling path of the rolling element, A linear guide device in which one of the guide rail and the slider linearly moves relative to the other by rolling the rolling element,
The linear guide device according to any one of claims 1 to 3, wherein the lubricant supply body for the linear guide device is fixed to an end portion of the slider in the moving direction.

Images