KR100624775B1 - End Plates for Linear Motion Sliders - Google Patents

Abstract

The present invention relates to an end plate for a linear motion slider, in particular, the flow path length between the first ball outer surface circulation groove and the lubrication inlet is shorter than the flow path length between the second ball outer surface circulation groove and the lubrication inlet. The cross-sectional area of the first lubrication inlet is smaller than the cross-sectional area of the second lubrication inlet, and relates to an end plate for a linear motion slider capable of evenly supplying lubricant to each ball outer surface circulation groove.

Linear motion, linear motion, lubrication, inlet, end plate

Description

End plate for linear motion slider

1 is an exploded perspective view of a linear motion unit according to a preferred embodiment of the present invention.

2 is a perspective view of the combination of FIG.

3 is a perspective view of the block body of FIG.

4 is a perspective view of the end plate of FIG.

5 is a cross-sectional view taken along line AA ′ of FIG. 4.

6 is a perspective view of the sealing member of FIG.

7 is a perspective view of the inner surface circulation member of Figure 1;

8 is a rear perspective view of the inner surface circulation member of FIG. 1;

9 is a perspective view of the rail frame of FIG.

** Description of symbols for the main parts of the drawing **

100: front cover

102, 107: through hole 103: front plate

104: back panel 105: front and rear frame

106: left and right frame 108: bolt

110: lock nut 120: color

130: flange 131, 151, 171, 174, 191, 201, 301, 412, 609: hole

132: protrusion 133, 152: flat portion

140: bearing 150: damper

160: ball screw 161: screw

170: rail frame 172: ball guide surface

173: jamming jaw 175, 302: round part

176: installation hole 178: vertical portion

180: Senseil rail 190: rear cover

200: upper cover 202, 204: guide groove

203: home 300: table

303: mounting hole 410: end seal

411: supply hole 413: protrusion

500: end plate 501: lubrication inlet

502: first connecting passage 505: third lubrication entrance

506: through hole 507: first lubrication inlet

508: second lube entrance 509: installation work

510, 514: fitting groove 511a: first ball outer circulation groove

511b: second ball outer circulation groove

512: first fitting groove 513: second fitting groove

515: seating groove 516: the first support

517: second support portion 518: connection surface

600: block body 601, 608: groove

602: seating groove 603: load ball groove

604: no-load ball path 605: installation

607: through hole 700: ball inner surface circulation member

701: fitting protrusion 702: support

703: ball inner circulation groove 704: connection

705: second connecting passage 706: third connecting passage

708: fourth lube entrance 709: groove

800: sealing member 801: first fitting part

802: second fitting portion 803: protruding piece

804: slope 805: groove

900: Ball 901: Outside the ball

Japanese Patent Publication No. 1987-200015

The present invention relates to an end plate for a linear motion slider, in particular, the flow path length between the first ball outer surface circulation groove and the lubrication inlet is shorter than the flow path length between the second ball outer surface circulation groove and the lubrication inlet. The cross-sectional area of the first lubrication inlet is smaller than the cross-sectional area of the second lubrication inlet, and relates to an end plate for a linear motion slider capable of evenly supplying lubricant to each ball outer surface circulation groove.

Conventional linear motion units are those disclosed in Japanese Patent Laid-Open No. 1987-200015.

The conventional linear motion unit is composed of a guide rail having a large ball guide surface, a block body, and a bearing block having end caps fastened to both front and rear ends of the block body, and a plurality of balls interposed between the guide rail and the bearing block.

The block main body is formed with a load ball receiving hole, a no-load ball receiving hole, and a groove.

The ball is arranged in a no-load ball receiving groove and a pipe mounted in the groove. The end cap is formed with a groove for fixing the end of the pipe.

Lubricating oil inlets are formed in the end cap mounted in the conventional linear motion unit to supply the lubricating oil.

The lubrication inlet is eccentrically formed due to spatial constraints.

Thus, there is a problem that different amounts of lubricant are injected into grooves disposed on both sides of the end plate due to the eccentrically arranged lubrication inlet.

 The present invention has been made to solve the above-mentioned problem, the flow path length between the first ball outer surface circulation groove and the lubrication injection port is shorter than the flow path length between the second ball outer surface circulation groove and the lubrication injection port, the first lubrication The cross-sectional area of the inlet is smaller than the cross-sectional area of the second lubrication inlet, and an object thereof is to provide an end plate for a linear motion slider that can evenly supply lubricant to each ball outer surface circulation groove.

The present invention for achieving the above object, in the end plate is installed on the linear motion slider, the first ball outer surface circulation groove and the second ball outer surface circulation groove is formed, the lubrication injection hole is formed, the lubricating oil is formed, A first connecting passage is formed to communicate with the lubrication inlet, and the first connecting passage and the first ball outer surface circulating groove to transfer the lubricating oil of the first connection passage to the first ball outer surface circulating groove An end plate having a lubrication inlet is formed, and a second lubrication inlet for connecting the first connection passage and the second ball outer circulation groove to transfer the lubricating oil of the first connection passage to the second ball outer surface circulation groove is formed. Including the body,

The flow path length between the first ball outer surface circulation groove and the lubrication inlet is shorter than the flow path length between the second ball outer surface circulation groove and the lubrication inlet, and the cross-sectional area of the first lubrication inlet is a cross-sectional area of the second lubrication inlet. It is characterized in that it is formed smaller.

According to this configuration, there is an advantage that the lubricant can be evenly supplied to each ball outer surface circulation groove.

According to another embodiment of the present invention, in the end plate installed in the linear motion slider, the first ball outer surface circulation groove and the second ball outer surface circulation groove are formed, and a lubrication injection hole for lubricating oil is formed, A first connection passage is formed to communicate with the first lubrication inlet connecting the first connection passage and the first ball outer circulation groove to transfer the lubricating oil of the first connection passage to the first ball outer circulation groove. And an end plate body configured to connect the first connection passage and the second ball outer circulation groove so as to transfer the lubricating oil of the first connection passage to the second ball outer circulation groove. The length of the flow path between the first ball outer surface circulation groove and the lubrication inlet is shorter than the length of the flow path between the second ball outer surface circulation groove and the lubrication inlet, and the lubrication column in the first connection passage. The minimum cross-sectional area of the shortest flow path between the inlet and the first lubrication inlet is smaller than the minimum cross-sectional area of the shortest flow path between the lubrication inlet and the second lubrication inlet in the first connection passage.

The end plate body has a through hole through which a shaft penetrates, and a third lubrication inlet communicating with the through hole and the first connection passage to transfer the lubricant between the shaft and the through hole is formed. Lubrication oil can also be effectively supplied between the plates.

A ball inner surface circulating groove is formed and includes a ball inner surface circulating member including a connecting portion connecting the support portion and the support disposed on the upper and lower sides, respectively, wherein the second connecting passages are formed in the support portion so as to communicate with the inner surface circulating groove. The ball inner surface circulation member has a third connection passage connecting the second connection passages disposed above and below in the longitudinal direction, and the connection portion connects the third connection passage and the lubrication inlet to the lubricant. A fourth lubrication inlet flowing into the ball inner surface circulation member is formed in the width direction so that the lubricating oil can be effectively transferred to the ball inner surface circulation member and the ball inner surface circulation member can be easily assembled to the end plate.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

For reference, among the configurations of the present invention to be described below, the same configuration as the prior art will be referred to the above-described prior art, and a detailed description thereof will be omitted.

As shown in Figures 1 to 9, the linear motion unit of the present embodiment, consisting of a slider that linearly moves along the rail frame 170 and the rail frame 170 largely.

As shown in FIG. 9, the rail frame 170 has vertical portions 178 formed at both sides thereof.

Ball guide surfaces 172 are formed along the front and rear directions of the rail frame 170 on upper and lower inner surfaces of the vertical portion 178.

The round portion 175 is formed at the corner of the connection portion between the vertical portion 178 and the bottom of the rail frame 170.

The outer surface of the vertical portion 178 is formed with a latching jaw 173 in which the sensor rail 180 is caught in the longitudinal direction, and the hole 174 on which the sensor rail 180 can be mounted on the upper portion of the locking jaw 173. Is formed.

In addition, the front and rear of the vertical portion 178 is formed with a hole 171 on which the front cover 100 and the rear cover 190 can be mounted.

On the bottom of the rail frame 170, a plurality of installation holes 176 are formed along the longitudinal direction so that the linear motion unit can be mounted on the other member.

The sensor rail 180 has a first bent portion bent outwardly at the top and a bottom, and a second bent portion bent downwardly at the first bent portion to guide the sensor in a linear motion.

The ball screw 160 penetrates the slider, and the front and rear ends thereof are rotatably installed through the bearing 140 at the front cover 100 and the rear cover 190.

The screw 161 is formed on the outer circumferential surface of the ball screw 160.

A thread is formed on the inner circumferential surface of the through hole of the slider into which the ball screw 160 is fitted to be coupled to the screw 161 of the ball screw 160, or a separate nut is installed on the slider.

As a result, the rotational movement of the ball screw 160 is converted to the linear movement of the slider.

The damper 150, the flange 130, the bearing 140, the front cover 100, the collar 120, and the lock nut 110 are sequentially inserted at the front side of the ball screw 160.

The damper 150, the bearing 140, and the rear cover 190 are sequentially inserted to the rear side of the ball screw 160.

The front cover 100 has a front plate 103 and a back plate 104, and the front and rear frame 105 connecting the front plate 103 and the back plate 104 are disposed on both sides up and down.

The front and rear frames 105 on both sides are connected by the left and right frames 106.

The left and right frames 106 are installed on the back of the rear plate 104, the upper left and right frames 106 are disposed higher than the upper surface of the back plate 104.

The back plate 104 is formed with a through hole 107 into which the bolt 108 is fitted so as to be installed on the rail frame 170, and the front plate 103 has a through hole 102 at a position corresponding to the through hole 107. ) Is formed.

A through hole is formed in the center of the front plate 103, and the jaw is formed stepwise in the through hole.

The flange 130 has a flat portion 133 formed at an upper portion and a lower portion thereof. A through hole into which the ball screw 160 is fitted is formed at a central portion thereof, and a circular protrusion 132 is formed at a front surface thereof so as to be close to the through hole. .

The flange 130 is formed with a hole 131 to be fixed to the back plate 104 around the protrusion 132.

Damper 150 has a flat portion 152 is formed on the top and bottom, like the flange 130, the hole 151 is formed eccentrically on the upper side.

The rear cover 190 has a hole in which the ball screw 160 is fitted in the center, and holes 191 are further formed on both sides of the hole to be fixed to the rail frame 170.

The slider is a ball body 900, a load ball groove 603 is formed in the front and rear direction, the block body 600, the no-load ball passage 604 is installed perforated corresponding to the load ball groove 603, and the block body (600) an end plate (500) disposed at the front and the rear and having a ball outer surface circulation groove, and a ball inner surface circulation groove (703) corresponding to the ball outer surface circulation groove are formed, and the block body (600) and the It comprises a ball inner surface circulation member 700 disposed between the end plate 500, the linear motion along the rail frame 170.

On the side of the block body 600, the load ball groove 603 is formed in the front and rear directions.

The through hole 607 is formed in the center of the block body 600, the ball screw 160 is fitted in the front and rear direction.

In the block body 600, a no-load ball passage 604 is drilled and installed in both upper and lower sides of the through hole 607 corresponding to the load ball groove 603.

In addition, seating grooves 602 are formed in the front and rear directions at both corners of the upper portion of the block body 600.

The upper surface of the block body 600 is formed with a hole 609 on which the table 300 can be mounted.

In addition, grooves 601 and 608 are formed in the upper and lower directions of the block body 600 in the left and right directions.

For example, the grooves 601 and 608 may be formed in a '-' or '+' shape.

Furthermore, a hole may be further formed on the upper surface of the block body 608 to communicate with the groove 608.

The end plate 500 is disposed at the front and rear of the block body 600, respectively, and an outer surface circulation groove is formed.

In the center of the end plate 500, a through hole 506 through which the ball screw 160 acts as an axial hole is formed.

The ball outer surface circulating groove may include a second ball outer surface circulating groove 511b formed at the upper left side of the through hole 506 and a first ball outer surface circulating groove 511a formed at the upper right side of the through hole 506. Can be.

In addition, the ball outer surface circulation grooves are formed in the lower side of both sides of the through hole 506 symmetrically to the first ball outer surface circulation groove 511a and the second ball outer surface circulation groove 511b.

As shown in FIG. 5, the first support part 516 and the second support part 517 are formed on the inner circumferential surface of the end plate 500 to contact and support the outer surface of the ball 900. A space portion is formed between the connection surface 518 connecting the second support portion 517 and the ball outer surface 901.

The ball 900 is in point contact with the first support 516 and the second support 517.

In addition, the space is a space in which the lubricating oil can be contained, and when the ball 900 pivots along the ball outer surface circulation groove, the lubricating oil is effectively supplied between the ball 900 and the inner circumferential surface of the end plate 500.

Therefore, the ball 900 can be effectively turned, and damage to the ball 900 and the end plate 500 can be reduced.

The first support part 516 and the second support part 517 are formed along the direction in which the ball 900 pivots inside the ball outer surface circulation groove.

The first support portion 516 and the second support portion 517 extend from the inner circumferential surface of the end plate 500 to the portion in contact with the ball 900, and the connecting surface 518 may have the first support portion 516 connected to the ball 900. It means from the contacted portion to the portion where the second support portion 517 contacts the ball 900.

The first support part 516 and the second support part 517 are provided in the same shape, and the first support part 516 is formed in an arc shape having a radius larger than the radius of the ball 900.

The first support part 516 and the second support part 517 are symmetrically disposed on the upper and lower parts with respect to the horizontal plane passing through the center of the ball outer surface circulation groove.

That is, the first support part 516 is disposed above the horizontal plane passing through the center of the ball outer surface circulation groove, and the second support part 517 is disposed below the horizontal plane passing through the center of the ball outer surface circulation groove.

As a result, when the ball 900 is inserted into the ball outer surface circulating groove, the upper and lower parts of the ball outer surface 901 are supported by the first support part 516 and the second support part 517, and then the ball 900 falls out toward the block body 600. I'm going.

In addition, since the first support part 516 and the second support part 517 are symmetrically arranged, the center point of the ball 900 supported by the first support part 516 and the second support part 517 is also defined by the ball outer surface circulation groove. It comes on a horizontal plane through the center.

Thus, the ball 900 can be rotated in a balanced manner without being eccentric to one side of the ball outer surface circulation groove.

In addition, the end plate 500 may be provided with a plurality of such support parts such that the ball 900 can be supported in contact with more parts.

The rear end of the end plate 500 is formed with a mounting groove 515 in which a bolt or the like can be mounted so as to communicate with the installation hole 509.

In the end plate 500, the upper and lower sides of the ball outer surface circulating groove (hereinafter, referred to as a front surface) are formed in a vertical direction so as to communicate with the first fitting groove 512 and the first fitting groove 512. The second fitting groove 513 is formed.

In addition, a groove into which the protruding piece 803 of the sealing member 800 may be fitted may be formed along the front and rear direction so as to communicate with the second fitting groove 513 on the upper side of the end plate 500.

The lubrication inlet 501 is formed to be eccentrically penetrated to one side of the upper end of the end plate 500, and lubricating oil is injected therein.

That is, the lubrication injection hole 501 has a total flow path length between the first ball outer surface circulation groove 511a and the lubrication injection hole 501 than the total flow path length between the second ball outer surface circulation groove 511b and the lubrication injection hole 501. It is arranged to be short.

The first connection passage 502 is formed to communicate with the lubrication injection hole 501, the cross-sectional area is formed constant along the periphery of the through-hole 506.

The first lubrication inlet 507 connects the first connection passage 502 and the first ball outer circulation groove 511a to transfer the lubricating oil of the first connection passage 502 to the first ball outer circulation groove 511a. do.

The second lubrication inlet 508 connects the first connection passage 502 and the second ball outer circulation groove 511b to transfer the lubricating oil of the first connection passage 502 to the second ball outer circulation groove 511b. do.

Since the resistance is proportional to the flow path length, the resistance of the entire flow path between the first ball outer surface circulation groove 511a and the lubrication injection hole 501 is the resistance of the entire flow path between the second ball outer surface circulation groove 511b and the lubrication injection hole 501. Becomes smaller.

In order to prevent the flow rate from being biased to one side due to the difference in resistance, the first lubrication inlet 507 has an inlet cross-sectional area smaller than that of the second lubrication inlet 508.

On the other hand, since the resistance is inversely proportional to the cross sectional area, the resistance generated at the second lubrication inlet 508 having a large cross sectional area is smaller than the resistance generated at the first lubrication inlet 507.

It is preferable to form a round portion at the corner of the connection portion of the second lubrication opening 508 and the first connection passage 502 to minimize the resistance.

Therefore, even if the lubrication inlet 501 is disposed close to the first lubrication inlet 507, the resistance generated in the entire flow path on both sides becomes similar, so that the first ball outer circulation groove 511a and the second ball outer circulation groove ( Lubricating oil can be supplied evenly to 511b).

Unlike the foregoing, the minimum cross-sectional area of the shortest flow path B between the lubrication inlet 501 and the first lubrication inlet 507 in the first connection passage 502 is the lubrication inlet 501 in the first connection passage 502. In order to be formed smaller than the minimum cross-sectional area of the shortest flow path (C) between the and the second lubrication inlet (508) may be evenly injected into the plurality of ball outer surface circulation grooves formed in the end plate (500).

That is, one side cross-sectional area of the shortest flow path B between the lubrication inlet 501 and the first lubrication inlet 507 is reduced without first forming a constant cross-sectional area of the first connection passage 502, or the first connection passage ( In 502, one side cross-sectional area of the shortest flow path C between the lubrication inlet 501 and the second lubrication inlet 508 is increased to reduce the resistance of the second lubrication inlet 508.

The fitting groove 510 is formed on both sides of the end plate 500 to communicate with the ball outer surface circulation grooves formed in the upper part and the lower part.

Both sides of the end plate 500 are formed so that the installation hole 509 penetrates between the through hole 506 and the fitting groove 510.

The first lubrication inlet 507 and the second lubrication inlet 508 are formed along the periphery of the installation hole 509 and are connected to the fitting groove 510.

The third lubrication inlet 505 communicates with the through hole 506 and the first connection passage 502 to transfer the lubricant between the ball screw 160 and the through hole 506.

The third lubrication inlet 505 is formed to be close to the second lubrication inlet 508.

On both sides of the end plate 500, protrusions are formed on the upper and lower sides in a shape corresponding to the ball guide surface 175 to be fitted to the ball guide surface 175.

The ball inner surface circulation member 700 is formed with a ball inner surface circulation groove 703 corresponding to the ball outer surface circulation groove, is disposed between the block body 600 and the end plate 500.

The ball inner surface circulating member 700 includes a ball inner surface circulating groove 703 and includes a support part 702 disposed above and below, and a connection part 704 connecting the support part 702.

The ball inner surface circulation groove 703 is formed along the outer circumferential surface of the support portion 702.

The support portion 702 is formed to correspond to the shape of the ball outer surface circulation groove, the connecting portion 704 is formed in a semi-circular cross-sectional shape so as to correspond to the shape of the fitting groove 510.

At the upper end or the lower end of the support part 702, the fitting protrusion 701 is formed in a semicircular shape corresponding to the shape of the fitting groove 514 formed in the end plate 500.

By such a configuration, when assembling the ball inner surface circulation member 700 to the end plate 500, the connecting portion 704 is inserted into the fitting groove 510, and the fitting protrusion 701 is disposed on the upper and lower ends of the end plate 500. The assembly is completed by inserting into the fitting groove 514 formed in the.

Therefore, there is an advantage that the assembly is easy and the work process is simplified.

The second connection passage 705 is formed in the support portion 702 so as to communicate with the ball inner surface circulation groove 703.

The third connection passage 706 is formed in the longitudinal direction on the back surface of the ball inner surface circulation member 700 is formed in the ball inner surface circulation member 700, connecting the second connection passage 705 disposed on the upper and lower do.

The fourth lubrication inlet 708 is formed in the connecting portion 704 so as to be open in the width direction, and connects the third connecting passage 706 and the lubrication inlet 501 to introduce the lubricant into the ball inner surface circulation member 700. .

Further, in order to smoothly flow the lubricating oil from the first lubrication inlet 507, the fourth lubrication inlet 708 is formed to have a wider cross-sectional area toward the outside of the ball inner surface circulation member 700.

That is, the fourth lubrication opening 708 is formed to be tapered.

In addition, the connection portion 704 may be provided with a groove 709 in the portion close to the installation hole 509 after assembly in order to prevent interference with the installation hole 509 of the end plate 500.

Unlike the above, the ball inner surface circulation member 700 may be formed integrally with the block body 600.

The sealing member 800 is disposed on both sides of the upper portion of the block body 600.

The sealing member 800 is formed by bending both ends of the first fitting portion 801 and the first fitting portion 801 respectively fitted to the first fitting groove 512, and the second fitting groove 513. It includes a second fitting portion 802 fitted to.

In the second fitting portion 802, a plurality of through holes may be formed along the front and rear directions to facilitate molding.

Protruding pieces 803 are disposed at both ends of the second fitting portion 513 to be disposed outside the end plate 500.

The protrusion member 803 allows the sealing member 800 to seal and dustproof between the end plate 500 and the rail frame 170.

The groove 805 is formed on the first fitting portion 801.

An inclined portion 804 is formed along the front and rear directions at the end of the second fitting portion 802.

The inclined portion 804 is in close contact with the upper end of the rail frame 170, so that the sealing role and the dust-proof role can be more effectively.

When assembling the sealing member 800, both ends of the first fitting portion 801 and the second fitting portion 802 are inserted into the first fitting groove 512 and the second fitting groove 513 formed in the end plate 500. The assembly is completed by inserting and seating the sealing member 800 in the seating body 602 of the block body 600.

As a result, the sealing member 800 is easily assembled, and at the same time to play the role of dustproof and sealing.

In addition, since a separate configuration such as a bolt is not required to install a sealing member on the slider, the slider can be kept compact.

The end chambers 400 are respectively disposed on the outer side of the end plate 500 disposed in the front-rear direction.

In the end chamber 400, a through hole through which the ball screw 160 penetrates is formed at a central portion thereof, and a supply hole 411 through which a lubricating oil supply nipple is installed at a position corresponding to the lubrication injection hole 501 is formed therethrough.

In the end chamber 400, holes 412 are formed at both sides of the through hole so that the end chamber 400 may be fastened to the end plate 500.

In addition, protrusions 413 fitted to the ball guide surface 172 are formed at upper and lower sides of the end chamber 400.

The table 300 is disposed above the block body 600 and the rail frame 170 and has a hole 303 formed therein so that the table 300 can be fastened to the block body 600.

In addition, protrusions are formed at both ends of the table 300, and round portions 302 are formed at the connection portion between the protrusion and the bottom of the table 300.

A hole 301 is further formed on the upper surface of the protrusion to fix another member.

The upper cover 200 is disposed above the table 300, and the holes 201 are formed to be close to four corners, and are installed on the front cover 100 and the rear cover 190.

On the back of the upper cover 200, guide grooves 202 and 204 are formed on both sides along the front and rear directions, and grooves 203 are formed along the front and rear directions between the two guide grooves 202 and 204.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art various modifications or variations of the present invention without departing from the spirit and scope of the invention described in the claims below Can be carried out.

According to the end plate for linear motion slider of the present invention as described above, there are the following effects.

The flow path length between the first ball outer circulation groove and the lubrication inlet is shorter than the flow path length between the second ball outer circulation groove and the lubrication inlet, and the cross-sectional area of the first lubrication inlet is smaller than the cross-sectional area of the second lubrication inlet. Thus, the lubricating oil can be evenly supplied to each ball outer surface circulation groove.

The end plate body has a through hole through which a shaft penetrates, and a third lubrication inlet communicating with the through hole and the first connection passage to transfer the lubricant between the shaft and the through hole is formed. Lubrication oil can also be effectively supplied between the plates.

A ball inner surface circulating groove is formed and includes a ball inner surface circulating member including a connecting portion connecting the support portion and the support disposed on the upper and lower sides, respectively, wherein the second connecting passages are formed in the support portion so as to communicate with the inner surface circulating groove. The ball inner surface circulation member has a third connection passage connecting the second connection passages disposed above and below in the longitudinal direction, and the connection portion connects the third connection passage and the lubrication inlet to the lubricant. A fourth lubrication inlet flowing into the ball inner surface circulation member is formed in the width direction so that the lubricating oil can be effectively transferred to the ball inner surface circulation member and the ball inner surface circulation member can be easily assembled to the end plate.

Claims (4)

In the end plate installed on the linear motion slider, The first ball outer circulation groove and the second ball outer circulation groove are formed, A lubrication inlet for lubricating oil is formed, A first connecting passage is formed to communicate with the lubrication inlet, A first lubrication inlet for connecting the first connection passage and the first ball outer surface circulating groove to transfer the lubricating oil of the first connection passage to the first ball outer surface circulating groove is formed. And an end plate body connecting the first connection passage and the second ball outer circulation groove to form a second lubrication inlet for transferring the lubricant oil of the first connection passage to the second ball outer circulation groove. , The flow path length between the first ball outer surface circulation groove and the lubrication injection hole is shorter than the flow path length between the second ball outer surface circulation groove and the lubrication injection hole, An end plate for the linear motion slider, characterized in that the cross-sectional area of the first lubrication inlet is formed smaller than the cross-sectional area of the second lubrication inlet. In the end plate installed on the linear motion slider, The first ball outer circulation groove and the second ball outer circulation groove are formed, A lubrication inlet for lubricating oil is formed, A first connecting passage is formed to communicate with the lubrication inlet, A first lubrication inlet for connecting the first connection passage and the first ball outer surface circulating groove to transfer the lubricating oil of the first connection passage to the first ball outer surface circulating groove is formed. And an end plate body connecting the first connection passage and the second ball outer circulation groove to form a second lubrication inlet for transferring the lubricant oil of the first connection passage to the second ball outer circulation groove. , The flow path length between the first ball outer surface circulation groove and the lubrication injection hole is shorter than the flow path length between the second ball outer surface circulation groove and the lubrication injection hole, The minimum cross-sectional area of the shortest flow path between the lubrication inlet and the first lubrication inlet in the first connection passage is smaller than the minimum cross-sectional area of the shortest flow path between the lubrication inlet and the second lubrication inlet in the first connection passage. End plate for linear motion slider characterized in that. The method according to claim 1 or 2, The end plate body is formed with a through hole through which a shaft penetrates, and a third lubrication inlet is formed in communication with the through hole and the first connection passage to transfer the lubricant between the shaft and the through hole. End plate for the slider. The method according to claim 1 or 2, A ball inner surface circulation groove is formed and includes a ball inner surface circulation member including a support portion disposed above and below and a connection portion connecting the support portion, Second support passages are formed in the support part so as to communicate with the ball inner surface circulation grooves, The ball inner surface circulation member is formed with a third connecting passage connecting the second connecting passage disposed in the upper and lower in the longitudinal direction, And a fourth lubrication inlet formed in the width direction by connecting the third connection passage to the lubrication inlet to introduce the lubricating oil into the ball inner surface circulation member.

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