KR101818933B1 - Linear guide having lubrication element - Google Patents

Abstract

The linear guide provided with the lubrication member of the present invention includes a guide rail, a guide block movably provided along the guide rail, and a lubricating member including a plurality of rolling elements interposed between the guide rail and the guide block In the linear guide,
The guide block includes a block, a retainer provided on both sides in the axial direction of the block to form a circulation passage of the rolling member, and a first ball support member, which is coupled to both sides of the retainer provided on both sides of the block in the axial direction, A second ball support member, and a seal member;
And the axial end portion of the circulation passage of the retainer is formed of a foam body containing lubricating oil.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a linear guide having a lubrication member,

The present invention relates to a linear guide provided with a lubricating member, and more particularly, to a linear guide provided with a lubricant-containing foam body in a U-groove of a retainer so that an oil film is formed on an entire rolling body passing through a U- To a linear guide provided with a smooth lubrication member.

Generally, the linear motion guide device comprises a guide rail, a slider, and a plurality of balls interposed between the guide rail and the slider. On the left and right side surfaces of the guide rail, rolling grooves for rolling balls are formed. The slider includes a main body having another transmission groove corresponding to the transmission groove, a pair of frames coupled to the main body, an end cap coupled to the front and rear of the frame, and an end seal coupled to the front and rear surfaces of the end cap. do.

Korean Patent Registration No. 10-0713151 (Apr. 24, 2007), which is filed in the prior art, discloses a linear guide device capable of securing the rigidity of a slider and reducing the number of parts. FIG. 1 is a perspective view showing a conventional linear guide device, and FIG. 2 is an exploded perspective view showing a conventional linear guide device.

1 and 2, the linear guide device includes a slider 1100 including a guide rail 1, a block composed of a main body 1200 and a return member 1360 and an end cap 1500, And a plurality of balls (3) interposed between the guide rail (1) and the slider (1100).

On both left and right side surfaces of the guide rail 1, a rolling groove 11 in which the ball 3 rolls is formed. The slider 1100 includes a block composed of a main body 1200 and a return member 1360 and an end cap 1500 disposed on the front and rear sides of the main body 1200 and coupled with the ball inner return groove 360 to form a ball return passage. And an engaging member for engaging the end cap 1500 with the main body 1200. An end seal 700 is coupled to the end cap 500. The main body 1200 includes a pair of legs 220 as a saddle shape and a table 230 connecting upper ends of the legs 220. The load ball transmission grooves 21 corresponding to the transmission grooves 11 are formed along the longitudinal direction of the main body at the right and left inner sides of the leg portions 220. In the leg portion 220, a no-load ball transmission groove 330 spaced apart from the load ball transmission groove 21 is formed to pass through the longitudinal direction of the main body.

The return member 1360 connecting the load ball transmission grooves 21 and the no-load ball transmission grooves 330 and forming the ball inner return grooves 360 is located on the left and right sides of the front and rear sides of the main body 1200, respectively. An edge portion 1362 having an angular shape is formed between the leg portion 220 and the return member 1360 and the edge portion 1362 is fitted in the end cap 1500. Grooves 1364 are formed on the front and rear sides of the leg portions 220 so that the cap protrusions 1524 of the end cap 1500 are fitted. On both side surfaces of the table 230, coupling grooves 1051 for coupling the hooks 1039 are formed. The front and rear surfaces of the table 230 are formed with outer protrusions 232 that fit into the caprises 1560 and inner protrusions 236 are formed inside the outer protrusions 232. A U-shaped oil groove 234 is formed between the outer projecting portion 232 and the inner projecting portion 236.

The end cap 1500 is disposed on the front and rear sides of the main body 1200 and has a ball outer return groove 1520 formed therein. A ball return passage is formed by the ball inner return groove 360 of the return member 1360 and the ball outer return groove 1520 of the end cap 1500. [ A groove 1038 is formed in the hook 1039 of the end cap 1500. A half-circular groove 1522 is formed at the top and bottom of the ball outer return rolling groove 1520 of the end cap 1500. An oil groove 1540 is formed in the capillary 1560 of the end cap 1500. An oil inlet 1542 is formed on the side surface of the end cap 1500 and a recess 59 is formed on the rear surface. The retainer 90 is assembled to the recess 59 of the end cap 1500. On both sides of the end cap 1500, an end seal assembly 1550 for coupling the end seal 700 is formed. The engaging protrusion 750 formed on the end seal 700 is fitted into the end seal assembling portion 1550.

Since the lubricating oil is not constantly supplied to the conventional linear guide device, the linear guide device is not smoothly operated due to the friction due to the ball having no oil film formed by the rotation of the ball, and there is a problem that the lubricating oil must be supplied periodically .

Korean Registered Patent No. 10-0713151 (Apr. 24, 2007)

In order to solve such a conventional problem, there is provided a linear guide provided with a lubrication member having a foam body containing lubricating oil in a U-groove of a retainer and uniformly forming an oil film on an entire rolling body passing through a U- do.

The linear guide provided with the lubrication member of the present invention includes a guide rail, a guide block movably provided along the guide rail, and a lubricating member including a plurality of rolling elements interposed between the guide rail and the guide block In the linear guide,

The guide block includes a block, a retainer provided on both sides in the axial direction of the block to form a circulation passage of the rolling member, and a first ball support member, which is coupled to both sides of the retainer provided on both sides of the block in the axial direction, A second ball support member, and a seal member;

And a part of the circulation passage of the retainer is provided with a foam body containing lubricating oil.

In the above, the retainer is composed of the first retainer member and the second retainer member;

The first retainer member is stacked on the block in the axial direction to form a first U-turn hole and a second U-turn hole which are axially penetrated;

The second retainer member is stacked on the first retainer member in the axial direction and comprises a plate member and two projecting members; The plate member being separated from the plate member by two concave insertion grooves; The protrusion member is inserted into the insertion groove, and a U-turn groove is formed in the protrusion member to cover the first U-turn hole and the second U-turn hole to form a circulation passage. .

The linear guide provided with the lubrication member according to the present invention is provided with a foam body containing lubricant in the retainer, so that lubricating oil is uniformly supplied to the rolling body to form a new oil film at all times, and the oil film is formed in the rolling body, There is a smooth effect.

1 is a perspective view showing a conventional linear guide device,
2 is an exploded perspective view showing a conventional linear guide device,
3 is a perspective view showing a linear guide provided with a lubrication member of the present invention,
4 is a bottom perspective view showing a linear guide provided with a lubrication member of the present invention,
5 is a bottom perspective view showing a state in which the cover is separated from the block of Fig. 4,
Fig. 6 is a perspective view showing a state in which the cover is detached from the block of Fig. 3,
7 is a perspective view showing a block of a linear guide provided with the lubrication member of the present invention and one retainer member,
8 and 9 are perspective views showing a second retainer member of the linear guide provided with the lubrication member of the present invention,
10 and 11 are perspective views showing a first retainer member of a linear guide provided with a lubrication member of the present invention.

Hereinafter, a linear guide having a lubrication member will be described in detail with reference to the accompanying drawings.

Fig. 3 is a perspective view showing a linear guide provided with a lubrication member of the present invention, Fig. 4 is a bottom perspective view showing a linear guide provided with a lubrication member of the present invention, Fig. FIG. 6 is a perspective view showing a state in which the cover is separated from the block of FIG. 3, FIG. 7 is a perspective view showing a block of the linear guide provided with the lubrication member of the present invention, FIGS. 8 and 9 are perspective views showing a second retainer member of a linear guide provided with a lubrication member of the present invention, and FIGS. 10 and 11 are perspective views of a first guide member of a linear guide provided with a lubrication member of the present invention Fig. 3 is a perspective view showing the retainer member. Fig.

In the following description, the direction in which the block 110 moves along the guide rail is referred to as the axial direction. It is described that the direction from the center of the block 110 toward the both ends in the axial direction is directed to the center of the block at both ends.

3 to 11, the linear guide of the present invention includes a guide rail (not shown), a guide block 100 movably provided along the guide rail, Which is a rolling member (101) interposed between the two rollers.

The guide block 100 includes a block 110, a cover 120, a retainer 130, a cover seal 150, a support member 160, a first ball support member 170, (180), and a second ball supporting member (190).

A retainer 130 and a cover seal 150 are provided on both sides of the block 110 in the axial direction and covers both the retainer 130 and the cover seal 150 on both sides in the axial direction of the block 110. [ (Not shown).

The block 110 has a length in the axial direction and has a generally inverted " U "shape extending downward from both sides so that the inner side faces both lateral sides of the guide rail. The retainer 130 is provided on both sides in the axial direction of the block 110 and forms the return passage of the rolling member 101. The retainer 130 is provided on both sides of the block 110 in the width direction. That is, a pair of retainers 130 are symmetrically arranged in the width direction on the front side in the axial direction of the block 110, and a pair of the retainers 130 are disposed symmetrically in the width direction on the rear side, . As the retainer 130 is dividedly provided on both sides in the width direction of the block 110, it is possible to prevent the deformation phenomenon that the retainer 130 slips inward when the retainer 130 is formed. The cover seal 150 is provided on both sides of the block 110 in the axial direction, forming a substantially inverted "U "

The upper and lower unloading holes 113 and 1133, which are spaced apart from each other in the downward direction and extend downward from both sides of the block 110, . The block 110 is provided on the guide rail so as to be movable in the axial direction of the guide rail.

Two rows of load-winding grooves 115 are formed on the inner surface of the block 110 opposite to each other in the vertical direction. The load winding groove 115 extends in the axial direction and is concavely curved to abut the ball as the rolling member 101. In the following description, the upper load guide groove 115 is referred to as an upper load guide groove 1151, and the lower load guide groove 115 is referred to as a lower load guide groove 1153. In FIG. 9, reference numeral 111 denotes a fastening groove formed concavely at the upper portion of both ends in the longitudinal direction of the block 110. The coupling grooves 111 may be spaced apart from each other in the width direction and may be formed in plural numbers.

4, a second ball supporting member 190, which will be described later, is provided between the width direction of the upper load winding groove 1151 formed on the inner surface of the block 110 in the width direction, And a first ball support member 170 is provided at the lower end of the lower load groove 1153 formed to be spaced apart in the width direction to support the rolling elements 101. [

The upper ends of the upper and lower unloading holes 1131 and 1133 are connected to the axial ends of the upper and lower unloading holes 1131 and 1133 so that a block coupling protrusion 1314 of a first retainer 131, A portion whose diameter is increased inward from the axial end portion in the axial direction is formed.

The rolling member 101 moving along the upper load winding groove 1151 is guided to the outside and inside in the width direction by the retainer 130 to be described later and moves to the upper unloading hole 1131 to form one circulation passage And the rolling member 101 moving along the lower load winding groove 1153 is guided to the outside in the width direction and inward by the retainer 130 to move to the lower unloading center hole 1133 to form another circulation passage do.

A protruding block inner surface 114 is provided in parallel with the axial direction and inward in the width direction between the upper and lower load grooves 1151 and 1153 and between the lower load groove 1153 and the lower load groove 1153.

The block inclined surface 112 is provided at the lower end of the block inner surface 114 provided at the lower end of the lower load groove 1153. [ The block inclined surface 112 is inclined downward toward the outside in the width direction. The block inclined surface 112 extends in the axial direction.

And a block downward surface 119 extending from the lower end of the block inclined surface 112 to the outside in the width direction. The block downward surface 119 extends in the axial direction and is downward.

And a block jaw surface 117 is provided extending downward from the widthwise outer end of the block downward surface 119. The block guide surface 117 extends in the axial direction and is directed in the width direction.

The retainer 130 is composed of a first retainer member 131 and a second retainer member 133 and is stacked on the block 110 in the axial direction. The first retainer member 131 and the second retainer member 133 are formed in a substantially quadrilateral shape in the form of a plate and extend in four shifting directions inward of the first and second retainer members 131 and 133 The shape of the sides is formed in a shape substantially similar to the cross-section of the inside of the block 110 in the width direction.

The first retainer member 131 is laminated on an axial end portion of the block 110, and is provided in a plate-like shape with its widthwise inner side opened.

As shown in FIG. 10, the first U-turn hole 1311 and the second U-turn hole 1313 are formed in the first retainer member 131 in the axial direction. The first U turn holes 1311 are formed in a plurality of spaced apart from each other in the vertical direction. The first U turn hole 1311 located at the upper portion is referred to as an upper first U turn hole 1311-1 and the first U turn hole 1311 located at the lower portion is referred to as a lower first U turn hole 1311-3. The upper first U-turn hole 1311-1 is positioned to communicate with the upper unloading hole 1131 in the axial direction, and the lower first U-turn hole 1311-3 is located in the lower unloading hole 1133 in the axial direction. .

And an upper second U-turn hole 1313-1 is formed through the upper first U-turn hole 1311-1 so as to be spaced inward in the width direction. And a lower second U-turn hole 1313-3 is formed through the lower first U-turn hole 1311-3 and spaced inward in the width direction. And a lower second U-turn hole 1313-3 is formed downward from the upper second U-turn hole 1313-1. The second U-turn holes 1313 are spaced apart from each other in the vertical direction. The upper second U turn hole 1313-1 is positioned to communicate with the upper load groove 1151 in the axial direction and the lower second U turn hole 1313-3 is positioned in the lower load groove 1153 in the axial direction .

The upper second U-turn hole 1313-1 and the upper first U-turn hole 1311-1 are connected to each other by an upper connection groove portion 1316-1. The upper connection groove portion 1316-1 is recessed to be a passage through which the rolling member 101 moves.

The lower second U turn hole 1313-3 and the lower first U turn hole 1311-3 are connected to the lower connection groove 1316-3. The lower connection groove portion 1316-3 is recessed to be a passage through which the rolling member 101 moves.

A retainer engagement groove 1315 for insertion of the second retainer 133, which will be described later, is formed concavely on the outer side of the first retainer member 131 in the axial direction. The retainer engagement grooves 1315 may be provided in a plurality of spaced apart from each other.

An upper first retainer groove 1319 is formed to extend in the axial direction on the inner upper side in the opened width direction of the first retainer member 131. The upper first retainer groove 1319 is upwardly concave, and the seal member 180 is inserted.

A lower first retainer groove 1317 extends axially below the first retainer member 131. The lower first retainer groove 1317 is concave upwardly and the seal member 180 is inserted.

11, on the inner surface of the first retainer member 131 in the axial direction, the edges of the upper first U-turn hole 1311-1 and the lower first U- And a block engaging projection 1314 is protruded. The block coupling protrusion 1314 is inserted into the axial end of the unloading hole 113 formed in the block 110.

A second ball support member insertion groove 1312 is recessed inwardly in the width direction of the first retainer member 131. The second ball supporting member 190 is inserted into the second ball supporting member insertion groove 1312.

A first ball supporting member insertion groove 1318 is recessed in a trapezoidal shape in a lower portion of the first retainer member 131 in the width direction. The first ball support member 170 is inserted into the first ball support member insertion groove 1318.

As shown in Figs. 8 and 9, the second retainer member 133 is formed in a plate-like shape, and the shape of the side inward in the width direction is formed similar to the shape of the inner end face of the block 110. [ The second retainer member 133 is composed of a plate member 133b and a projecting member 133a.

A second retainer projection 1331 protrudes outwardly in the axial direction on the axially outer side surface of the plate member 133b. The second retainer protrusion 1331 is inserted into the cover seal 150 and engaged. The second retainer protrusion 1331 is formed in a bent shape at least once. The third seal portion insertion groove 1332 is formed in the width direction of the second retainer projection 1331. The third seal portion insertion groove 1332 is formed concavely in the axial direction. The seal member 180 is inserted into the third seal portion insertion groove 1332. The third seal portion insertion groove 1332 extends vertically to the end portion and is provided in communication with the upper second retainer groove 1339 and the lower second retainer groove 1337. The third seal portion insertion groove 1332 is bent at least once.

The upper second retainer groove 1339 extends in the axial direction at an inner upper side in the width direction of the second retainer member 133. The upper second retainer groove 1339 is formed upwardly concave. A seal member 180 is inserted into the upper second retainer groove 1339. The upper second retainer groove 1339 is provided in communication with the third seal portion insertion groove 1332.

The lower second retainer groove 1337 extends axially in the lower inner side in the width direction of the second retainer member 133. The lower second retainer groove 1337 is formed upwardly concave. A seal member 180 is inserted into the upper second retainer groove 1339. The lower second retainer groove 1337 is provided in communication with the third seal portion insertion groove 1332.

As shown in Fig. 9, an insertion groove 133b1 is formed in the axial inner side surface of the plate member 133b. The insertion groove 133b1 is formed in an elliptical shape extending in the width direction. The insertion groove 133b1 is formed to be inclined in an upward direction toward the inner side in the width direction. The insertion grooves 133b1 are spaced apart from each other in the vertical direction. The two insertion grooves 133b1 are formed side by side. The protrusion member 133a is inserted into the insertion groove 133b1.

A retainer engagement protrusion 1333 protrudes from the inner surface of the plate member 133b in the axial direction toward the first retainer member 131. The retainer engagement protrusions 1333 may be spaced apart from each other. The retainer engagement protrusion 1333 is inserted into the retainer engagement groove 1315 of the first retainer member 131 so that the second retainer member 133 is engaged with the first retainer member 131. [

The projecting members 133a are formed into two rod-like shapes. The projecting members 133a are respectively inserted into the insertion grooves 133b1. The projecting member 133a is formed of a foam body containing lubricating oil. The projecting member 133a is made of urethane foam or the like. A U-shaped groove 1335 for covering the first U-turn hole 1311 and the second U-turn hole 1313 and forming a circulation passage is formed at the axially inner end of the protruding member 133a.

The U-shaped groove 1335 is concavely curved. The upper U-shaped groove 1335-1 of the projecting member 133a provided at the upper portion is used as the upper U-shaped groove 1335-1 and the U-shaped groove 1335 of the projecting member 133a provided at the lower portion is used as the lower U- ).

The protrusion member 133a provided at the lower portion is inserted into the lower connection groove portion 1316-3 and the protrusion member 133a provided at the upper portion is inserted into the upper connection groove portion 1316-1. The upper U-turn groove 1335-1 covers the upper second U turn hole 1313-1, the upper connecting groove portion 1316-1 and the upper first U-turn hole 1311-1 so that the rolling member 101 A moving passage is formed. The outer surface 1336 of the protruding member 133a is inserted and coupled so as to face the inner surface 1312a of the first U turn hole 1311 and the second U turn hole 1313. [

The axially inner end of the lower protruding member 133a is inserted into the edge of the lower second U turn hole 1313-3, the lower connecting recess 1316-3 and the lower first U-hole 1311-3 . Therefore, the lower U-shaped groove 1335-3 covers the lower second U-turn hole 1313-3, the lower connecting groove 1316-3 and the lower first U-hole 1311-3 so that the rolling body 101 A moving passage is formed.

The outer shape of the support member 160 is a hexahedron. The support member 160 is disposed at an upper portion of the retainer 130 and is provided between the cover seal 150 and the block 110 in the axial direction.

The seal member 180 is formed in a substantially rectangular opening shape. The seal member 180 is inserted into the groove formed in the block 110, the retainer 130, the first ball support member 170 and the second ball support member 190 and is prevented from being separated from each other.

The cover seal 150 is provided on the outer side in the axial direction of the second retainer member 133. The cover seal 150 is provided in contact with the second retainer member 133. The cover seal 150 is formed in a plate shape with its bottom opened. The cover seal 150 is in the "inverted U" shape.

The second ball supporting member 190 is formed in a plate shape. The second ball support member 190 is provided on the inner surface of the block 110 in the axial direction. The second ball support member 190 is coupled to the cover seal 150 provided at both ends in the axial direction.

The first ball support member 170 is formed in two rod shapes. The first ball support member 170 is provided at a lower portion of the inner surface of the block 110 in the widthwise direction. The first ball support members 170 are spaced apart from each other in a width direction and engaged with the block 110.

The cover 120 is formed in a box shape with its bottom opened. The cover 120 is provided to enclose the retainer 130 and the cover seal 150. The cover 120 protects the retainer 130 and the cover seal 150.

Although the linear guide having the lubrication member according to the present invention has been described with reference to the embodiments shown in the drawings, it is merely an example, and various modifications and equivalent embodiments can be made by those skilled in the art I will understand. Accordingly, the scope of the true technical protection should be determined by the technical idea of the appended claims.

100: Linear guide
110: block 120: cover
131: first retainer member 133: second retainer member
150: cover seal 170: first ball supporting member
180: seal member 190: second ball supporting member

Claims (2)

A guide rail, a guide block 100 movably provided along the guide rail, and a plurality of rolling elements 101 interposed between the guide rail and the guide block 100;
The guide block 100 includes a block 110, a retainer 130, a cover seal 150, a cover 120, a support member 160, a first ball support member 170, A two-ball support member 190, and a seal member 180;
The block 110 has an inverted " U "shape in which both sides extend downward. The block 110 is vertically spaced apart from both sides of the downwardly extending portion. The block 110 includes an upper and a lower sub- A center hole 113 is formed in the axial direction so as to extend in the axial direction of the upper load winding groove 1151 and the lower load winding groove 1153 in the vertical direction on the facing inner side surface, The hole and the lower unloaded center hole are formed with an increased diameter portion axially inward from the axial end;
The retainer 130 includes a first retainer member 131 and a second retainer member 133 which are provided on both sides in the axial direction and the width direction of the block 110 and are stacked in the axial direction, Forming a passageway;
The cover seal 150 is in the "inverted U" shape and is in contact with the second retainer member 133 at the axially outer side of the second retainer member 133 and inserted with the second retainer protrusion 1331;
The cover 120 is provided on both sides in the axial direction of the block 110 so as to cover the retainer 130 and the cover seal 150 provided on both sides in the axial direction of the block 110;
The first retainer members 131 are laminated on the axial end portions of the block 110 and are spaced apart from each other in the up and down direction to form upper first U-turn holes 1311-1 and lower first U- A turn hole 1311-3 is formed in the axial direction, an upper second U-turn hole 1313-1 is formed in the axial direction so as to be spaced inward in the width direction from the upper first U-turn hole 1311-1, 1 U turn hole 1311-3 and the lower second U turn hole 1313-3 is formed in the axial direction so that the upper second U turn hole 1313-1 and the upper first U turn hole The lower first U turn hole 1313-3 and the lower first U turn hole 1311-3 are connected to the lower connection groove portion 1316-3 by a concave upper connection groove portion 1316-1, And an axial inner side surface thereof extends axially inwardly at the edges of the upper first U-turn hole 1311-1 and the lower first U-turn hole 1311-3 to increase the diameters of the upper and lower unloading holes. And an upper first retainer groove 1319 is formed to extend in the axial direction and a lower first retainer groove 1317 is formed at a lower portion of the lower first retainer groove 1319 A second ball supporting member insertion groove 1312 is recessed inwardly inwardly in the width direction, and a first ball supporting member insertion groove 1318 is formed in a lower portion inward in the width direction, ≪ / RTI >
The second retainer member 133 is composed of a plate member 133b and two projecting members 133a in the form of a plate; A second retainer projection 1331 is provided on the axial outer side surface of the plate member 133b and is inserted into the cover seal 150 in a manner of being bent at least once in an axially outwardly projecting manner, A third seal portion insertion groove 1332 extending in the axial direction and being bent at least once is formed in the widthwise direction of the first seal portion 1331, And a lower second retainer groove 1337 connected to the third seal portion inserting groove 1332. The lower second retainer groove 1333 is formed in the inner lower portion in the width direction, And an axial elliptic insertion groove 133b1 spaced apart in the vertical direction is formed on the inner side surface in the axial direction; The two protruding members 133a are formed of a foam body containing lubricant and are respectively inserted into the insertion grooves 133b1. An upper U-shaped groove 1335-1 And the lower U-shaped groove 1335-3 are concave and curved;
The upper protruding member 133a is inserted into the upper second U turn hole 1313-1, the upper connecting groove portion 1316-1 and the upper first U-turn hole 1311-1 so that the outer surface 1336 is connected to the inner surface 1312a And the upper U-turn groove 1335-1 covers the upper second U-turn hole 1313-1, the upper connecting groove portion 1316-1 and the upper first U-turn hole 1311-1, Thereby forming a passage through which the valve seat 101 moves;
The lower protruding member 133a is inserted into an edge of the lower second U turn hole 1313-3, the lower connecting recess 1316-3 and the lower first U-hole 1311-3, and the lower U- 3 cover the lower second U turn hole 1313-3, the lower connecting groove portion 1316-3, and the lower first U-hole 1311-3 to form a passage through which the rolling member 101 moves;
The support member 160 is formed in a hexahedron and is positioned at an upper portion of the retainer 130;
The first ball support member 170 has two rod-shaped portions. The first ball support member 170 is spaced apart in the widthwise direction from the lower surface of the inner side surface of the block 110 in the width direction. A first ball support member insertion groove 1318 formed at an inner lower portion of the direction;
The second ball supporting member 190 is formed in a plate shape and has both ends inserted into the second ball supporting member insertion groove 1312 and disposed between the width direction of the upper load winding groove 1151, Lt; / RTI >
The seal member 180 is formed in an opened rectangular shape and has a lower first retainer groove 1317, an upper first retainer groove 1319, a third seal portion insertion groove 1332, an upper second retainer groove 1339, The second ball retaining member 190 and the second ball retaining member 190 to prevent the first and second ball retaining members 170 and 173 from being separated from each other. . delete

Images