JP2014035076A - Dust seal for linear guide bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem in a linear guide bearing which needs a dust seal to prevent intrusion of dust on its both end faces, as the dust intruding therein causes degradation of accuracy in sliding and breakage of a number of ball bearings disposed therein, that maintenance work is restricted by the dust seal, which causes increase of man-hours and makes maintenance work troublesome.SOLUTION: A linear guide bearing body 2 provided with a lower opening portion to slide over a linear rail 1 and including a number of ball bearings, and thin plate-shaped dust seals 3 are disposed. Lower opening portions 3b of the dust seals 3 fixed to both end faces 2a of the linear guide bearing body 2, are formed narrow at lower end sides and wide at an upper sides. The dust seal 3 is provided with an expansion area 3c for expanding between both side ends of the lower opening portion 3b, and by being expanded in a width direction, the dust seal can be attached and detached through a sliding angular edge portion 1c formed on the expanded width of the rail 1.

Description

  The present invention relates to a dust seal for a linear guide bearing, and more particularly, to a dust seal for preventing dust from entering inside a linear guide bearing used in a linear sliding portion in a machine tool or the like. is there.

Conventionally, for example, the previously disclosed seal device 100 is attached to the end of the linear motion bearing 10 in the moving direction of the moving body 20, and is elastically biased against the top surface or side surface of the track base. The seal member 110, 120, 130 has a shape of an end face that is complementary to the contour of the surface to be urged, and is restricted in movement in the movement direction.
The seal members 110, 120, and 130 are made of a metal bearing material, and the outer peripheral portion of the end cap 13 is sandwiched between a pair of end face plates (see Patent Document 1) or on the side of the bearing 12. A dust-proof side seal 15 fixed to the bearing 12 so as to be pressed is provided, and the outer periphery of the side seal 15 is fixed to the bearing 12 so as to be pressed against the side seal 15. Roller rolling grooves and other exposed surfaces provided with a metal protector 16 for scraping dust and dirt accumulated on the exposed surface (see Patent Document 2) and auxiliary seals that contact the entire circumference of the rail 12 together with the side seals 14 Is installed on the side seal 14, and the side seal 14 is fitted to the rail 12 together with the auxiliary seal, and the side seal 14 is After fixing the cap 13, which removes the auxiliary seal from the side seal 14 (see Patent Document 3) it has been disclosed.
JP-A-5-172139 JP 2008-32180 A JP 2008-69871 A

  However, these linear guide bearings, if dust is mixed inside, may cause the sliding accuracy to drop or damage the many ball bearings inside, causing dust on both end surfaces orthogonal to the sliding direction. A dust seal is required to prevent mixing, and the linear motion bearing 10 of Patent Document 1 is a linear guide bearing in which three seal members 110, 120, and 130 are incorporated between an outer plate 180 and an inner plate 190. In Patent Document 2, a side seal 15 and a metal protector 16 are overlapped and fixed to the side of the bearing 12. Furthermore, in Patent Document 3, the side seal 14 and the reinforcing plate 21 are overlapped and fixed to the bearing 11. However, the upper part of the rail that slides linearly is formed wider than the lower part, and the linear guide bearing is mounted across the upper part of the rail. Therefore, the linear guide bearing and the linear guide bearing Each of the lower openings of the dust seals fixed to both end faces has a concave groove shape with a narrow lower width and a wider upper width. When disassembling for maintenance, it slides to the end of the rail. The dust seal member was removed and maintained in a place without rails, but it was time consuming because work was constrained and the number of operations increased.

  In view of the above problems, the present invention solves these problems as a result of diligent study, and a rail base portion erected on a fixed floor surface, and a flat top surface formed by widening above the rail base portion, A linear rail having substantially right-angled sliding angle edges formed between both side edges along the longitudinal direction of the flat top surface and both side surfaces of the rail base, and the flat top surface of the rail In order to slide across the sliding angle edge, a linear guide bearing main body provided with a recessed groove-like lower opening and a large number of ball bearings installed, and orthogonal to the sliding direction of the linear guide bearing main body A plurality of fixing screw holes for fixing the dust seal provided on both end faces, and a seal side fixing screw hole at a position that matches the plurality of fixing screw holes and detachably fixed by screws. With a thin-plate dust seal of the same shape Thus, the lower opening with the dust seal fixed to both end faces of the linear guide bearing body that slides across the rail is formed with a narrow bottom end and a wide upper side, and the dust seal is the central side in the width direction. An expansion / contraction region that extends between both ends of the lower opening is provided in the lower opening, and the width can be expanded in the width direction to enable attachment / detachment through the sliding corner edge formed in the rail's widening. Further, the dust seal is formed by laminating rubber and synthetic resin.

  The dust seal for a linear guide bearing of the present invention has a lower opening portion of a dust seal that is detachably fixed to both end surfaces of a linear guide bearing body that slides across a flat top surface formed widened above a rail base. The lower side is narrow and the upper side is widened, but the width of the dust seal is expanded in the width direction by forming a stretchable area that extends between both ends of the lower opening at the center of the width direction of the dust seal. Therefore, it can be attached and detached at any position on the rail, speeds up the work efficiency in maintenance, and is an epoch-making and highly practical invention.

  The embodiment of the dust seal for a linear guide bearing of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a perspective explanatory view of an embodiment of the dust seal for a linear guide bearing of the present invention, and FIG. It is a front view of the Example of the dust seal of the dust seal for linear guide bearings.

  The present invention relates to a dust seal for a linear guide bearing, and more particularly, to a dust seal for preventing dust from entering inside a linear guide bearing used in a linear sliding portion in a machine tool or the like. The linear guide bearing dust seal according to claim 1 includes a rail base portion 1a erected on a fixed floor surface, a flat top surface 1b formed widened above the rail base portion 1a, and the flat surface. Linear rails 1 each having a substantially right-angled sliding angle edge 1c formed between both side edges along the longitudinal direction of the top surface 1b and both side faces of the rail base 1a; In order to slide across the flat top surface 1b of the rail 1 and the respective sliding corner edges 1c, a downward opening having a groove shape is provided below and a large number of ball bearings (not shown) are provided. Linear guide bearing main body 2, a plurality of fixing screw holes 2b for fixing dust seals 3 provided on both end surfaces 2a orthogonal to the sliding direction of the linear guide bearing main body 2, and the plurality of fixing screws A seal-side fixing screw hole 3a at a position coinciding with the hole 2b and each of the dust seals 3 having a thin plate shape substantially the same shape as the both end faces 2a fixed by screws. Each lower opening 3b with each dust seal 3 fixed to both end faces 2a of the linear guide bearing body 2 sliding over the lower end is formed with a narrow lower end and an upper wide, and the dust seal 3 An expansion / contraction area 3c that extends between both side ends of the lower opening 3b is provided at the center in the width direction, and the sliding angle edge 1c formed in the width of the rail 1 is extended by expanding in the width direction. It is characterized in that to enable detachable.

  Further, the dust seal for linear guide bearing according to claim 2 is characterized in that in the dust seal for linear guide bearing according to claim 1, the dust seal 3 is made of rubber.

  Further, the dust seal for linear guide bearing according to claim 3 is characterized in that in the dust seal for linear guide bearing according to claim 1, the dust seal 3 is formed by laminating rubber and synthetic resin. is there.

  That is, the linear guide bearing dust seal of the present invention comprises a rail 1, a linear guide bearing body 2 and a dust seal 3 as shown in FIG.

  The rail base 1a of the linear rail 1 is erected from a fixed floor surface of a machine tool or the like, and the flat top surface 1b is extended above the rail base 1a. The width of 1b is formed wider than the width of the rail base portion 1a, and the sliding corner edge portion 1c is formed between the side edge portions along the longitudinal direction of the flat top surface 1b and the both side surfaces of the rail base portion 1a. It is the thing of the substantially right-angle shape formed in.

  Next, the linear guide bearing body 2 slides across the flat top surface 1b of the rail 1 and the respective sliding corner edges 1c, and is provided with a groove-shaped lower opening 3b below. In order to slide in contact with both edges of the flat top surface 1b of the rail 1 on both sides of the top surface of the lower opening 3b and on both sides of the lower opening 3b, a large number of balls are slid in the sliding direction. Bearings are arranged side by side in four rows.

  Next, a plurality of fixing screw holes 2b are provided on both end surfaces 2a orthogonal to the sliding direction of the linear guide bearing body 2, and fix a dust seal 3 to be described later.

  Further, the dust seal 3 is fixed to both end faces 2a orthogonal to the sliding direction of the linear guide bearing body 2, and matches the plurality of fixing screw holes 2b formed in both end faces 2a of the linear guide bearing body 2. A seal-side fixing screw hole 3a is provided in the dust seal 3 at a position where it is attached, and is detachably fixed to both end faces 2a of the linear guide bearing body 2 by screws. The shape and the shape of the dust seal 3 are substantially the same thin plate shape.

  Further, the dust seal 3 is fixed to both end faces 2 a of the linear guide bearing body 2, and the linear guide bearing body 2 and the lower opening 3 b of each dust seal 3 slide over the rail 1. The upper side is formed wide and the lower side is formed narrow.

  The expansion / contraction region 3c is provided at the central side of the dust seal 3 in the width direction so as to be able to expand between both side ends of the lower opening 3b. The expansion of the rail 1 is achieved by expanding the dust seal 3 in the width direction. It can be attached and detached through the sliding corner edge 1c formed in the width.

  Furthermore, the dust seal 3 is formed of rubber, and the dust seal 3 is formed by laminating rubber and synthetic resin.

  In the present invention, the lower opening of the dust seal detachably fixed to both end surfaces of the linear guide bearing main body sliding across the flat top surface formed widened above the rail base has a narrow lower side. The upper side is formed with a wider width, but by expanding the width direction in the center of the dust seal in the width direction, the expansion area extending between both ends of the lower opening is widened. A dust seal for linear guide bearings that can be detached even at a position and speeds up work efficiency in maintenance is provided.

  FIG. 1 is a perspective explanatory view of an embodiment of a dust seal for a linear guide bearing of the present invention.   FIG. 2 is a front view of an embodiment of the dust seal of the linear seal bearing dust seal of the present invention.

DESCRIPTION OF SYMBOLS 1 Rail 1a Rail base part 1b Flat top surface 1c Sliding angle edge part 2 Linear guide bearing main body 2a Both end surfaces 2b Fixing screw hole 3 Dust seal 3a Seal side fixing screw hole 3b Lower opening

Claims (3)

  A rail base erected on a fixed floor surface, a flat top surface formed by widening above the rail base, both side edges along the longitudinal direction of the flat top surface, and both side surfaces of the rail base In order to slide across the flat top surface of each rail and each sliding angle edge, a linear rail provided with each sliding angle edge of substantially right angle formed between A linear guide bearing body having a recessed groove-shaped lower opening and a large number of ball bearings, and a plurality of dust seals for fixing dust seals respectively provided on both end surfaces orthogonal to the sliding direction of the linear guide bearing body A fixing screw hole, and a dust-type dust seal having substantially the same shape as the both end faces, wherein a sealing side fixing screw hole is provided at a position coinciding with the plurality of fixing screw holes and is detachably fixed by screws. Slid across the rail Each lower opening with each dust seal fixed to both end faces of the linear guide bearing body is formed with a narrow bottom end and a wide upper side, and the dust seal opens downward at the center in the width direction. A linear guide bearing dust seal characterized in that it can be attached and detached through the sliding corner edge formed in the widening of the rail by providing an expansion / contraction region that expands between both side ends of the portion and expanding in the width direction. .   The dust seal for a linear guide bearing according to claim 1, wherein the dust seal is made of rubber.   2. The dust seal for a linear guide bearing according to claim 1, wherein the dust seal is formed by laminating rubber and a synthetic resin.

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