JP2018091345A - Grease coating jig for linear motion guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grease coating jig capable of applying grease only to balls rolling at an inner peripheral side of a slider of a linear motion guide device such as a linear bushing, and suppressing wasteful coating of grease.SOLUTION: A grease coating jig has a cylindrical portion 5 fittable to a hollow slider 2, a tip end portion 4 of an integrated structure including a closing end face 13 for closing one end side of a hollow portion 8, an intermediate cylindrical portion 6 having a diameter larger than an outer diameter of the cylindrical portion 5 and disposed at the other end side, and a connecting portion 7 to which a grease injector 3 for supplying the grease can be connected. Groove portions 15 axially extended at intervals in a circumferential direction are formed on an outer peripheral face 14 of the cylindrical portion 5, a plurality of grease holes 16 are formed on the groove portions 15 at intervals in a longitudinal direction, and grease is supplied to balls 12 circulating and rolling in the slider 2 through the grease holes 16.SELECTED DRAWING: Figure 1

Description

  In the linear motion guide apparatus having a slider that slides relatively on a round shaft, the present invention supplies grease to lubricate a ball that circulates and rolls on a raceway formed in the longitudinal direction of the inner peripheral surface of the slider. The present invention relates to a grease application jig for a linear motion guide device that can be used.

  Conventionally, for example, a linear bushing is known as a linear guide device, and the linear bushing is composed of a slider into which a long shaft is inserted, and the linear bushing is arranged in an outer cylinder constituting the slider. The cage that holds the moving body is made of synthetic resin, metal steel plate, etc., and the retainer is fixed to the outer cylinder by fitting retaining rings in the grooves formed at both ends of the outer cylinder so that the cage does not fall out of the outer cylinder. It is structured into a structure. The inner surface of the slider of the linear bushing is formed with a raceway surface that is a plurality of raceway grooves along the axial direction, and the raceway is configured so that balls, which are rolling elements, circulate and roll. Has been. For example, when grease for vacuum environment is applied to the ball rolling on the raceway surface of the slider, grease for special environment such as vacuum environment is expensive, so apply grease only to the ball of rolling element. It is preferable to prevent waste of grease and reduce environmental waste caused by grease without wasteful consumption.

  2. Description of the Related Art Conventionally, a grease application jig is known that applies grease easily and evenly to the inside of an object having a hole. The grease application jig is provided with a grease injection port at one end of a cylindrical hollow body corresponding to the internal shape of the object, and a plurality of holes are formed on the entire outer peripheral surface of the body ( For example, see Patent Document 1).

JP-A-11-264498

  The grease application jig applies grease to the inner surface of the cylindrical hole of the slide bush, and has a cylindrical body portion inserted into the cylindrical hole and a grease inlet provided at one end of the body portion. However, there are many grease supply holes that supply grease to the entire outer periphery of the fuselage, and grease is applied to the entire inner periphery of the cylindrical hole. When the gun is connected and grease is injected, the grease is uniformly applied to the entire inner peripheral surface of the slide bush hole, which has the technical idea of applying only to a specific portion of the inner peripheral surface, that is, a required portion. It was not. For example, a slider in a linear bushing has a plurality of raceway surfaces formed in the axial direction of its inner peripheral surface, and rolling element balls roll on the raceway surface. Grease is applied only to these balls. If possible, the grease is not wasted and expensive grease is not consumed. Therefore, it has been a problem how to configure the grease application jig to reduce the waste applied not to the balls but to the vicinity by applying the grease only to the balls to be applied.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problem, and a groove portion for accommodating a ball to be coated is formed on the outer peripheral surface of a cylindrical grease jig that can be inserted into a slider, and the groove is lubricated. It has a hole. By accommodating the ball in the groove, the position of the ball and the position of the greasing hole can be aligned, grease can be applied only to the ball, and unnecessary grease application can be suppressed. Thus, it is possible to provide a grease application jig for a linear motion guide device that makes it possible to supply grease only to the balls of the rolling elements and to ensure proper lubrication of the slider.

The present invention relates to a cylindrical portion having a first hollow portion formed so as to be fitted into a hollow mating member having a plurality of rolling elements to which grease is supplied and applied, and one end of the first hollow portion of the cylindrical portion A tip portion formed in an integral structure having a closed end face for sealing the side, a second hollow portion that is integral with the cylindrical portion and connected to the first hollow portion on the other end side of the cylindrical portion; An intermediate cylindrical portion having a larger diameter than the outer diameter of the cylindrical portion, and a connecting portion formed integrally with the intermediate cylindrical portion and capable of connecting a grease injector for supplying the grease into the first hollow portion;
On the outer peripheral surface of the cylindrical portion, groove portions that are spaced apart in the circumferential direction and extend in the axial direction are formed in the same number corresponding to a plurality of the rolling elements that circulate and roll the mating member, and each of the cylindrical portions The groove portion is formed with a plurality of greasing holes that are spaced apart in the longitudinal direction and penetrate from the outer surface of the cylindrical portion to the first hollow portion. Concerning ingredients.

  Further, the groove portion of the cylindrical portion is formed so that the rolling element that circulates and rolls on a raceway surface formed to extend in the longitudinal direction on the inner peripheral surface of the mating member can roll. The rolling element is applied with grease through the greasing hole formed in the groove.

  Further, the overall length in the longitudinal direction between the greasing holes located at both ends formed in the groove portion of the cylindrical portion is formed substantially the same as the overall length in the longitudinal direction of the raceway surface.

  Further, a step portion is formed at the boundary between the cylindrical portion and the intermediate cylindrical portion, and a contact surface for positioning the counterpart member in the axial direction with respect to the cylindrical portion is formed on the step portion. is there.

  In addition, the greasing hole formed in the groove portion of the cylindrical portion is formed such that the number thereof gradually decreases from the tip end side of the cylindrical portion toward the connecting portion side. Alternatively, the greasing hole formed in the groove portion of the cylindrical portion is formed such that the hole diameter gradually decreases from the distal end side of the cylindrical portion toward the connecting portion side.

  The length of the tip portion is substantially the same as the length of the cylindrical portion, the outer diameter of the tip portion is smaller than the outer diameter of the cylindrical portion, and the outer diameter of the connecting portion is the intermediate cylinder. It is formed larger than the outer diameter of the part.

  The mating member is a cylindrical slider in a linear bushing or a ball spline. A raceway surface formed in the longitudinal direction is formed on the inner peripheral surface of the slider, and the rolling surface is formed on the raceway surface. A moving ball is built by circulating rolling.

  Further, the tip portion is formed in a solid structure, and the connection portion is formed in a third hollow portion in which an injection port capable of connecting the grease injector is formed.

The present invention also provides a cylindrical portion having a first hollow portion formed so as to be fitted into a hollow counterpart member having a plurality of rolling elements to which grease is supplied and applied, and the first hollow portion of the cylindrical portion. A tip portion formed in an integral structure having a closed end surface that seals one end of the grease, and a connection that can be connected to a grease injector that is formed in an integral structure with the cylindrical portion and supplies the grease into the first hollow portion Part
The tip portion is formed in a stealing hollow portion, the connection portion is formed with a screw on the outer peripheral surface for screwing the grease injector, and an inlet for supplying grease is formed in the center. On the outer peripheral surface, grooves that are spaced apart in the circumferential direction and extend in the axial direction are formed in the same number corresponding to the plurality of rolling elements of the rolling member that circulates and rolls on the mating member, Relates to a grease application jig comprising a plurality of greasing holes that are spaced apart in the longitudinal direction and penetrate from the outer surface of the cylindrical portion to the first hollow portion.

  Since the grease application jig according to the present invention is configured as described above, a plurality of identical grooves are formed so that the axially extending groove portions spaced circumferentially on the cylindrical portion correspond to the track surface of the slider such as a linear bushing. Since it is formed in a row (for example, 4 rows), grease can be supplied to only a plurality of ball rows at a time, and the greasing operation can be performed very efficiently. Useless use can be suppressed. That is, this grease application jig rolls rolling elements into grooves formed with a plurality of greasing holes spaced apart in the longitudinal direction and supplies grease to the balls, so it is applied only to the balls on which the grease rolls. Therefore, waste of grease can be suppressed. Of course, since the greasing hole is formed in the groove, the length of the groove is longer than the distance between the greasing holes at both ends. In addition, the grease application jig can be easily aligned with the raceway surface of the slider by simply aligning the groove with the ball row and inserting it into the slider. Greasing can be applied to a plurality of ball rows at once, and only each ball row can be greased, so that waste of grease can be suppressed and the amount of grease can be reduced. Therefore, this grease applicator can provide a small amount of expensive special or dedicated grease for a slider such as a linear bushing, and it is possible to supply a large number of sliders in a fixed amount. Since grease is applied, it is easy to adapt to the type and viscosity of the grease, and if the oil supply hole is formed to correspond to the type or viscosity of the grease, the uneven supply of grease can be suppressed, and even lubrication can be achieved. It becomes possible. In addition, this grease application jig is energy saving because there is no need for wiping work, since excess grease is not discharged during lubrication.

  In addition, since the grease application jig has a groove that is longer than the arrangement position of the greasing holes, the grease can be prevented from leaking from the groove. Furthermore, this grease application jig can form a tip portion having an outer diameter corresponding to the inner diameter of a mating member to be applied, that is, a linear bushing or the like, at the end of the cylindrical portion that is closed. When the grease application jig is inserted into the slider, the tip is inserted first into the slider, and the slider is stably held by the grease application jig. The ball and groove of the rolling element can be aligned, and the cylindrical part can be positioned on the slider and inserted. In other words, the grease application jig is stably held by the grease application jig during alignment with the slider, so that the alignment work between the ball and the groove is facilitated and the workability is improved. Can be improved. In addition, this grease application jig has a bias in the amount of grease supplied in the longitudinal direction of the cylindrical part, and the amount of grease supplied on the inlet side increases, which may prevent grease from being uniformly applied to the balls. Therefore, in order to solve this problem, the number of greasing holes on the inlet side can be reduced, or the diameter of the greasing holes on the inlet side can be reduced to reduce the bias in the amount of grease supplied in the longitudinal direction of the cylindrical part. Can be suppressed.

It is a front view which shows one Example of the grease application jig | tool by this invention. It is sectional drawing in line AA of the grease application jig | tool of FIG. It is a perspective view which shows the slider of the linear bushing of the other member to which the grease application jig | tool of FIG. 1 applies grease. FIG. 4 is a partial cross-sectional front view showing a state where the grease application jig of FIG. 1 is fitted into the slider of the linear bushing shown in FIG. 3. It is the side view of the partial cross section which showed the state which inserted the grease application jig | tool of FIG. 4 in the slider. It is explanatory drawing which shows another Example of the arrangement | sequence state of the some greasing hole formed in the groove part in the grease application jig | tool of FIG. It is explanatory drawing which shows another Example of the arrangement | sequence state of the some greasing hole formed in the groove part in the grease application jig | tool of FIG. It is a front view which shows another Example of the connection part of the grease application jig | tool of FIG. FIG. 7 is a front view showing still another embodiment of the connecting portion of the grease application jig of FIG. 1 and showing a state where a grease injector is mounted on the grease application jig.

  Embodiments of a grease application jig according to the present invention will be described below with reference to the drawings. The embodiment described here describes a linear bushing slider as a grease application target. Is not limited to a linear bushing slider. As shown in FIG. 3, the grease application jig 1 has a raceway groove or raceway surface 18 in which a rolling element ball 12 held by a cage 22 circulates and circulates on an inner peripheral surface 17 of a linear bushing. The present invention can be applied to supply and apply grease to the formed slider 2. For example, the slider 2 of the linear bushing is slidably inserted through the ball 12 of the rolling element along the longitudinal direction of the track shaft (not shown). On the inner peripheral surface 17 of the slider 2, a raceway surface 18 is formed in which a ball row is provided in which a plurality of balls 12 circulate and roll along the longitudinal direction. Grease can be supplied to a plurality of ball rows only once. The slider 2 includes a raceway surface 18 on which the balls 12 forming the ball row circulate and roll, a return path 27 formed in parallel to the raceway surface 18, and a pair of direction change paths that connect the raceway surface 18 and the return path. A circuit-like circulation path 28 made up of 26 is formed, and the ball 12 is incorporated so as to circulate and roll along the circulation path 28. Moreover, although the cage | basket 22 is produced with the metal steel plate in the Example, it can also be produced with a synthetic resin.

  In particular, the grease application jig 1 according to the present invention has a plurality (four rows in FIG. 2) of groove portions 15 inserted into the inner peripheral surface 17 of the slider 2 and accommodating a plurality of balls 12 in a plurality of ball rows. The cylindrical part 5 provided with the hollow part 8 (first hollow part) formed along the longitudinal direction of 14 and the cylindrical part 5 provided with the closed end face 13 that seals one end side of the hollow part 8 of the cylindrical part 5 are integrated. The distal end portion 4 formed in the structure, the other end side of the cylindrical portion 5 is provided with a hollow portion 9 (second hollow portion) that is integrated with the cylindrical portion 5 and connected to the hollow portion 8, and the outer diameter of the cylindrical portion 5 The intermediate cylindrical portion 6 having a larger diameter and the intermediate cylindrical portion 9 are formed integrally with the connecting portion 7 having a hollow portion 10 (third hollow portion) that can be connected to the grease injector 3 that supplies grease. , A plurality (four rows in FIG. 2) of groove portions 1 formed on the cylindrical portion 5 so as to be spaced apart in the circumferential direction. To is characterized in that Kyuaburaana 16 penetrating a groove 15 in the radial direction at a position spaced along the longitudinal direction are formed. That is, on the outer peripheral surface 14 of the cylindrical portion 5, a groove portion 15 that is spaced apart in the circumferential direction and extends in the axial direction corresponds to a plurality of balls 12 that are rolling elements that circulate and roll the slider 2 that is the counterpart member. The groove portion 15 of the cylindrical portion 5 is formed with a plurality of greasing holes 16 spaced from each other in the longitudinal direction and penetrating from the outer surface of the cylindrical portion 5 to the hollow portion 8, that is, in the radial direction. .

  Further, in the grease application jig 1, the groove portion 15 formed in the cylindrical portion 5 is formed to a depth that allows a part of the ball 12 loaded in the slider 2 to enter. That is. The groove portion 15 can be set to a depth at which the ball 12 rolls on the upper edge of the groove portion 15 when the cylindrical portion 5 is inserted into the slider 2. A part of the ball 12 loaded on the slider 2 and held on the cage 22 and rolling on the raceway surface 18 protrudes from the inner peripheral surface 17. That is, the groove portion 15 of the cylindrical portion 5 is formed so that the ball 12 that circulates and rolls on the raceway surface 18 formed in the longitudinal direction on the inner peripheral surface 17 of the slider 2 can roll. 12 is applied with grease through a greasing hole 16 formed in the groove 15. Further, the outer diameter of the tip portion 4 is slightly smaller than the inner diameter of the slider 2 by the amount of the ball 12 protruding from the inner peripheral surface 17 of the slider 2, and the outer diameter of the cylindrical portion 5 is the inner peripheral surface of the slider 2. 17 and substantially the same diameter. That is, the outer diameter of the tip portion 4 is formed to be slightly smaller than the outer diameter of the cylindrical portion 5. Therefore, the tip 4 of the grease application jig 1 can be easily fitted into the cylindrical slider 2. Further, a part of the ball 12 protruding from the inner peripheral surface 17 enters the groove portion 15 of the cylindrical portion 5 and is locked in the circumferential direction, and the slider 2 moves in the circumferential direction with respect to the grease application jig 1. Positioned and inserted.

  The hollow portion 10 of the connecting portion 7 functions as a grease inlet 11 when the grease injector 3 is attached to the connecting portion 7. The grease injector 3 can be fixed to the grease application jig 1 by screwing using a mounting screw hole 29 provided in the connection portion 7. Part of the hollow portions 8 and 9 and the hollow portion 10 form a grease supply path extending in the longitudinal direction from the injection port 11. The cylindrical portion 5 is formed with a plurality of greasing holes 16 penetrating the groove portions 15 from the greasing passages formed by the hollow portions 8, 9, 10 so as to face the respective ball rows. The tip portion 4 integrally formed with the cylindrical portion 5 functions to insert and guide the grease application jig 1 into the hollow inner peripheral surface 17 of the slider 2. The grease supplied to the grease application jig 1 from the grease injector 3 is a plurality of ball rows partially protruding from the inner peripheral surface 17 of the slider 2 from the grease supply hole 16 formed in the groove portion 15 of the cylindrical portion 5. The balls 12 can be greased at once. Further, the grease supplied from the grease injector 3 to the grease application jig 1 is removed from the grease application jig 1 along the longitudinal direction so that the balls 12 in the ball train circulate and circulate in the circulation path 28 as a whole. Will be greasing.

  In the grease application jig 1, the total length L 3 in the longitudinal direction between the greasing holes 16 located at both ends formed in the groove portion 15 of the cylindrical portion 5 is a track formed by extending in the longitudinal direction on the inner peripheral surface 17 of the slider 2. The surface 18 is formed substantially the same as the entire length L2 in the longitudinal direction. A step portion 19 formed at the boundary between the cylindrical portion 5 and the intermediate cylindrical portion 6 is formed on the contact surface 20 that positions the slider 2 in the axial direction with respect to the cylindrical portion 5. As shown in FIG. 4, the slider 2 has snap rings 21 fitted into both ends. The contact surface 20 of the step portion 19 of the intermediate cylindrical portion 6 is in contact with the retaining ring 21 of the slider 2, and the slider 2 can be positioned and inserted in the grease application jig 1 in the axial direction. In this state, the grease injector 3 can be connected to the connecting portion 7 to supply the grease from the grease injector 3 and apply the grease to the balls 12 of the slider 2.

  For this grease application jig 1, the formation state of the greasing hole 16 formed in the groove portion 15 of the cylindrical portion 5 is set, for example, as shown in FIG. As shown in FIG. 7, the grease can be changed so that the grease can be uniformly supplied to the balls 12. That is, as shown in FIG. 6, the greasing holes 16 formed in the groove portion 15 of the cylindrical portion 5 may be formed so that the number of the connecting portion 7 side of the groove portion 15 is smaller than that of the tip portion 4 side. it can. Alternatively, as shown in FIG. 7, the greasing hole 16 formed in the groove portion 15 of the cylindrical portion 5 may be formed such that the hole diameter is smaller on the connecting portion 7 side of the groove portion 15 than on the tip portion 4 side. it can.

  As an example of the grease application jig 1, the length L4 of the tip portion 4 is formed substantially the same as the length L1 of the cylindrical portion 5, and the outer diameter of the tip portion 4 is the cylindrical portion. The outer diameter of the connecting portion 7 is formed larger than the outer diameter of the intermediate cylindrical portion 6. In the grease application jig 1, the tip portion 4 can be formed in a solid structure as shown in FIG. 1, but in some cases, the tip portion 4A is configured to be lightweight as shown in FIG. Therefore, it can be formed in the meat stealing hollow portion 25. Further, as shown in FIG. 1, the connecting portion 7 is formed in the hollow portion 10 (third hollow portion) in which the inlet 11 to which the grease injector 3 can be connected is formed, or as shown in FIG. In addition, it is possible to form a tapered convex portion 31 in which a screw 30 extending in a tapered shape is formed in the connecting portion 7A, and to form an injection port 24 for supplying grease extending in the longitudinal direction of the central portion. The taper-shaped convex part 31 is formed with a pipe taper screw 30 to which a grease gun can be directly attached. Alternatively, as shown in FIG. 9, a screw 23 can be formed on the outer peripheral surface of the connecting portion 7 </ b> B, and the tip of the grease injector 3 can be screwed into the screw 23 to be screwed.

  The slider 5 can be inserted into the grease application jig 1 by the following process. First. Insert the tip 4 of the grease application jig 1 into the slider 2 of the linear bushing. At this time, since the diameter of the tip portion 4 is slightly smaller than the inner diameter of the slider 2, the tip of the tip portion 4 is inserted into the inner diameter of the slider 2, and the grease application jig 1 is further inserted into the slider 2. Thus, the slider 2 and the grease applying jig 1 are inserted in an axially aligned state by a large number of balls 12 in the opposing ball row. Next, the cylindrical portion 5 is inserted into the slider 2, and at that time, a part of the balls 12 protrudes from the slider 2 at four locations in the circumferential direction, and the diameter between the opposing balls 12 is smaller than the diameter of the cylindrical portion 5. Therefore, when the slider 2 is swung while being moved in the circumferential direction with respect to the grease application jig 1, the ball 12 fits into the groove portion 15 of the cylindrical portion 5, and then the cylinder of the grease application jig 1. The portion 5 enters the slider 2 and can be inserted. The retaining ring 21 provided on the slider 2 abuts against the contact surface 20 of the step portion 19 of the intermediate cylindrical portion 6 so that the slider 2 contacts the grease application jig 1 in the axial direction. Thus, the groove 15 of the grease applying jig 1 can be positioned in the ball row of the slider 2.

  Therefore, the grease injector 3 is attached to the connection portion 7 of the grease application jig 1, and the grease is injected from the grease injector 3 into the groove portion 15 of the cylindrical portion 5. The grease injected from the grease injector 3 into the grease application jig 1 is supplied to the balls 12 loaded in the slider 2 from the greasing holes 16 provided in the groove portion 15 of the cylindrical portion 5. After injecting a predetermined amount of grease into the groove portion 15 from the grease injector 3, the slider 2 is removed from the grease application jig 1, and the greasing operation is completed. At this time, when the depth of the groove portion 15 formed in the cylindrical portion 5 is set to a depth at which the ball 12 rolls on the groove portion 15, the ball 12 is removed by inserting and removing the grease application jig 1 from the slider 2. If grease is injected from the grease injector 3 to the cylindrical portion 5 in this state, the grease can be applied to the entire outer surface of the ball 12, so that the grease can be more uniformly applied to the ball 12. Instead of the linear bushing slider 2, a known linear motion guide slider such as a ball spline slider can be used as the application target. Further, the slider is not limited to a cylindrical shape. Specifically, the slider has a columnar or arc-like hole into which the cylindrical portion 5 of the grease applying jig 1 can be inserted, and the inner surface of the hole. Further, the present invention can also be applied to a so-called round shaft type in which balls, which are rolling elements, are arranged so as to protrude in the axial direction and run on a cylindrical shaft.

  The grease application jig according to the present invention is preferably applied to apply grease to a slider such as a linear bushing.

DESCRIPTION OF SYMBOLS 1 Grease application jig 2 Slider 3 Grease injector 4, 4A Tip part 5 Cylindrical part 6 Intermediate cylindrical part 7, 7A, 7B Connection part 8 Hollow part (1st hollow part)
9 Hollow part (second hollow part)
10 Hollow part (third hollow part)
11 Inlet 12 Ball (Rolling element)
13 Closed end surface 14 Outer peripheral surface 15 Groove portion 16 Greasing hole 17 Inner peripheral surface 18 Track surface 19 Step portion 20 Contact surface 25 Meat stealing hollow portion 30 Screw

Claims (10)

A cylindrical portion having a first hollow portion formed so as to be fitted into a hollow mating member having a plurality of rolling elements to which grease is supplied and applied, and one end side of the first hollow portion of the cylindrical portion is sealed. A tip portion formed in an integral structure having a closed end surface, a second hollow portion that is integral with the cylindrical portion and connected to the first hollow portion on the other end side of the cylindrical portion, An intermediate cylindrical portion having a larger diameter than an outer diameter, and a connecting portion formed integrally with the intermediate cylindrical portion and capable of connecting a grease injector for supplying the grease into the first hollow portion;
On the outer peripheral surface of the cylindrical portion, groove portions that are spaced apart in the circumferential direction and extend in the axial direction are formed in the same number corresponding to a plurality of the rolling elements that circulate and roll the mating member, and each of the cylindrical portions The groove portion is formed with a plurality of greasing holes that are spaced apart in the longitudinal direction and penetrate from the outer surface of the cylindrical portion to the first hollow portion. Ingredients.   The groove of the cylindrical portion is formed such that the rolling element that circulates and rolls on a raceway surface that extends in the longitudinal direction on the inner peripheral surface of the mating member can roll, and the rolling element that rolls. The grease application jig for a linear motion guide device according to claim 1, wherein grease is applied through the greasing hole formed in the groove.   3. The overall length in the longitudinal direction between the grease supply holes located at both ends formed in the groove portion of the cylindrical portion is formed substantially the same as the overall length in the longitudinal direction of the raceway surface. Grease application jig for linear motion guide devices.   A stepped portion is formed at a boundary between the cylindrical portion and the intermediate cylindrical portion, and a contact surface for positioning the counterpart member in the axial direction with respect to the cylindrical portion is formed on the stepped portion. Item 4. A grease application jig for the linear motion guide device according to any one of Items 1 to 3.   The said greasing hole formed in the said groove part of the said cylindrical part is formed from the gradually decreasing number as it goes to the said connection part side from the said front-end | tip part of the said cylindrical part. A grease application jig for the linear motion guide device according to Item 1.   The said greasing hole formed in the said groove part of the said cylindrical part is formed from the said front-end | tip part side of the said cylindrical part, and the diameter of a hole is formed so that it may become small gradually. A grease application jig for the linear motion guide device according to claim 1.   The length of the tip portion is substantially the same as the length of the cylindrical portion, the outer diameter of the tip portion is formed smaller than the outer diameter of the cylindrical portion, and the outer diameter of the connection portion is that of the intermediate cylindrical portion. The grease application jig for a linear motion guide device according to claim 1, wherein the grease application jig is formed to be larger than an outer diameter.   The counterpart member is a cylindrical slider in a linear bushing or a ball spline, and the raceway surface formed in the longitudinal direction is formed on the inner peripheral surface of the slider, and the rolling element is formed on the raceway surface. The grease application jig for a linear motion guide device according to any one of claims 2 to 7, wherein the ball is incorporated by circulating rolling.   The said front-end | tip part is formed in a solid structure, and the said connection part is formed in the 3rd hollow part in which the injection port which can connect the said grease injector is formed. A grease application jig for the linear motion guide device according to the item. A cylindrical portion having a first hollow portion formed so as to be fitted into a hollow mating member having a plurality of rolling elements to which grease is supplied and applied, and one end side of the first hollow portion of the cylindrical portion is sealed. A tip portion formed in an integral structure having a closed end surface, and a connection portion formed in an integral structure with the cylindrical portion and capable of connecting a grease injector for supplying the grease into the first hollow portion;
The tip portion is formed in a stealing hollow portion, the connection portion is formed with a screw on the outer peripheral surface for screwing the grease injector, and an inlet for supplying grease is formed in the center. On the outer peripheral surface, grooves that are spaced apart in the circumferential direction and extend in the axial direction are formed in the same number corresponding to the plurality of rolling elements of the rolling member that circulates and rolls on the mating member, Is a grease application jig for a linear motion guide device, wherein a plurality of greasing holes are formed so as to penetrate from the outer surface of the cylindrical portion to the first hollow portion, spaced apart in the longitudinal direction.

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