Linear guide

Abstract

This linear guide is provided with: a guide rail having a raceway surface; a slider having rolling elements that roll on the raceway surface; and a case that houses a lubricant supply member impregnated with a lubricant and that presses the lubricant supply member so as to make contact with the raceway surface. The lubricant supply member has: a pair of sleeve parts each having a contact section pressed against the raceway surface; and a connection part connecting the upper sections of the pair of sleeve parts. The connection part includes: at least one thin section having a thickness reduced in the vertical direction; and pressed sections that are disposed above and outward toward the right and left of the thin section, and are pressed outward toward the right and left by a pressing part provided to the case.

Description

Linear guide

[0001] The present invention relates to a linear guide equipped with a lubrication unit.

[0002] Conventionally, a linear guide includes a guide rail extending in the axial direction and a slider mounted on the guide rail so as to be movable relative to the guide rail, and the slider moves relative to the guide rail in the axial direction via a plurality of rolling elements that circulate between rolling element rolling grooves formed in the guide rail and the slider. In order to use a linear guide stably for a long period of time, it is important to supply a sufficient amount of lubricant to the rolling element rolling grooves and the rolling elements to maintain a good lubrication state.

[0003] For this reason, a linear guide has been disclosed in which a porous lubricant supply member containing a lubricant is housed in a case and attached to the end of the slider, and lubricant is supplied from the lubricant supply member that comes into contact with the rolling element rolling grooves of the guide rail.

[0004] Patent Document 1 discloses a linear guide bearing device that includes a lubricant supply member that is attached to the axial end of a slider that is mounted on a guide rail and that supplies lubricant by sliding against the rail-side raceway surface of the guide rail, and a case that houses the lubricant supply member so as to cover its outer periphery, and a ring-shaped pressing member provided on the case that applies a biasing force to the lubricant supply member so that it contacts the rail-side raceway surface of the guide rail.

[0005] Japanese Patent Application Publication No. 2005-207497

[0006] In Patent Document 1, a pressing member is used to press the upper center of the lubricant supplying member outward to the left and right, thereby deforming a pair of sleeves of the lubricant supplying member inward to the left and right toward the guide rail, thereby maintaining contact between the sleeves of the lubricant supplying member and the rail-side track surface. However, it is necessary to consider the possibility that only the thin-walled portion formed in the portion of the lubricant supplying member disposed above the guide rail deforms, and the sleeves of the lubricant supplying member do not deform properly so as to be pressed toward the guide rail.

[0007] The present invention has been made in view of the above-mentioned problems, and its object is to provide a linear guide that can stabilize the contact of a deformed lubricant supply member with a rail-side raceway surface, thereby efficiently and continuously supplying the lubricant impregnated in the lubricant supply member to the rail-side raceway surface.

[0008] The above object of the present invention is achieved by the following configuration: (1) A linear guide comprising: a guide rail having a raceway surface along the longitudinal direction, a slider slidably engaged across the guide rail and having rolling elements rolling on the raceway surface, and a case attached to an axial end of the slider, accommodating a lubricant supplying member impregnated with lubricant and pressing the lubricant supplying member into contact with the raceway surface, wherein the lubricant supplying member has a pair of sleeves having a contact portion pressed against the raceway surface, and a connecting portion connecting upper portions of the pair of sleeves and positioned above the guide rail, and the connecting portion has at least one thin-walled portion that is thinned in the up-down direction, and a pressed portion positioned above the thin-walled portion and on the left-right outer side, pressed outward to the left and right by a pressing portion provided on the case.

[0009] According to the present invention, even in the case of a lubricant supply member in which a thin portion is formed at the connection portion connecting a pair of sleeve portions, the sleeve portion of the lubricant supply member can be stably deformed toward the guide rail, thereby maintaining contact between the lubricant supply member and the rail-side track surface.

[0010] FIG. 1 is a front view of a linear guide according to the present invention. FIG. 2 is a side view of a linear guide according to the present invention. FIG. 3 is a front view of a lubricant supplying member housed in a case. FIG. 4 is a front view of the case. FIG. 5 is a front view of a lubricant supplying member. FIG. 6 is an enlarged view of a pressing portion and a pressed portion. FIG. 7 is an enlarged view of a first mounting portion and a first recess. FIG. 8 is a front view of a lubricant supplying member housed in a case of a comparative example. FIG. 9 is a model diagram showing a deformation state of the lubricant supplying member when the case of the comparative example is used. FIG. 10 is a model diagram showing a deformation state of the lubricant supplying member when the case of the first embodiment is used. FIG. 11 is a graph showing the relationship between the load applied to the pressed portion and the amount of pressing of the protruding portion in the first embodiment and the comparative example. FIG. 12 is a front view of a lubricant supplying member housed in a case of a second embodiment.

[0011] Hereinafter, linear guides (linear guiding devices) according to each embodiment of the present invention will be described in detail with reference to the drawings. In the following description, the up-down direction, width direction, and axial direction of the slider respectively represent directions in a state in which the slider is assembled to a guide rail arranged with its longitudinal direction horizontal, and the width direction of the slider is a direction perpendicular to the longitudinal direction of the guide rail and the up-down direction of the slider, and is also referred to as the left-right direction, and the axial direction of the slider is a direction along the longitudinal direction of the guide rail, and is also referred to as the front-rear direction.

[0012] (First embodiment) The configuration of a linear guide will be described with reference to Figures 1 and 2. Figure 1 is a front view of a linear guide according to the present invention. Figure 2 is a side view of a linear guide according to the present invention. As shown in Figures 1 and 2, a linear guide 10 according to the first embodiment includes a linear guide rail 20 and a slider 30 that is assembled so as to straddle the guide rail 20 and slidably engages with the guide rail 20 via a plurality of rolling elements (rollers).

[0013] The guide rail 20 is made of metal, and has rail-side raceway surfaces 21 formed on both its left and right side surfaces, each of which is recessed in a trapezoidal shape facing inward to the left and right, and which extend along the longitudinal direction of the guide rail 20. The rail-side raceway surfaces 21 include a rail-side upper raceway surface 21a and a rail-side lower raceway surface 21b. The rail-side upper raceway surface 21a is formed obliquely downward so as to form an acute angle with the upper surface of the guide rail 20. The rail-side lower raceway surface 21b is formed obliquely upward so as to form an acute angle with the lower surface of the guide rail 20.

[0014] The slider 30 consists of a slider body 31 having sleeve portions 35 on both the left and right sides of the guide rail 20, end caps 32 attached to both axial ends of the slider body 31, and lubrication units 33 attached to the axial ends of each end cap 32.

[0015] On the inner surface of each sleeve portion 35 of the slider body 31, a slider-side upper raceway surface 34a facing the rail-side upper raceway surface 21a of the guide rail 20 and a slider-side lower raceway surface 34b facing the rail-side lower raceway surface 21b of the guide rail 20 are formed along the longitudinal direction of the guide rail 20. The rail-side upper raceway surface 21a and the slider-side upper raceway surface 34a form a loaded rolling path, and the rail-side lower raceway surface 21b and the slider-side lower raceway surface 34b form another loaded rolling path. The slider body 31 has two rolling element return paths 36a, 36b in each of the sleeve portions 35. The rolling element return paths 36a, 36b each penetrate the thick portions of the sleeve portions 35 in the axial direction of the guide rail 20. This configuration can be seen in FIG. 1 .

[0016] The end cap 32 is formed in a generally U-shape and has a curved path (not shown) that connects the slider-side raceway surface of the slider body 31 and the rolling element return path, and a rolling element circulation path is formed by the rail-side raceway surface 21, slider-side raceway surfaces 34a, 34b, rolling element return paths 36a, 36b, and the curved paths at both ends. A plurality of roller-shaped rolling elements and retainer pieces (not shown) that hold the plurality of rolling elements at approximately equal intervals are alternately assembled and arranged within the rolling element circulation path.

[0017] The lubrication unit 33 includes a synthetic resin case 40, a lubricant supply member 50 housed in the case 40, and a generally U-shaped side seal 60 that matches the outer shape of the end cap 32. This configuration can be seen in Figure 2.

[0018] Next, specific configurations of the lubricant supplying member 50 and the case 40 that constitute the lubrication unit 33 will be described with reference to Figures 3 to 7. Figure 3 is a front view showing the lubricant supplying member housed in the case. Figure 4 is a front view showing the case. Figure 5 is a front view showing the lubricant supplying member. Figure 6 is an enlarged view of the main parts showing the pressing portion and the pressed portion. Figure 7 is an enlarged view of the main parts showing the first mounting portion and the first recess.

[0019] (Lubricant Supplying Member 50) The lubricant supplying member 50 contains a lubricant such as lubricating oil or grease. Examples of the lubricant supplying member 50 include a molded body made of an oil-impregnated material such as an oil-impregnated resin or oil-impregnated rubber. Specific examples include a molded body made of a mixture of a lubricant and rubber, and a molded body of resin or rubber impregnated with a lubricant. The type of resin is not particularly limited, but examples include polyurethane, polyethylene, polypropylene, etc. Another example of the lubricant supplying member 50 is a porous member made of a porous body impregnated with a lubricant. Examples of porous bodies include a porous body made of polyolefin and a tangled fiber body. The type of polyolefin is not particularly limited, but examples include polyethylene and polypropylene. The type of tangled fiber body is not particularly limited, but examples include wool felt, tangled polyester fiber body, tangled polyamide fiber body, tangled acrylic fiber body, etc. The type of lubricant contained in the lubricant supplying member 50 is not particularly limited, but general lubricating oils such as mineral oil and synthetic oil, and general lubricating grease can be used. As a result, the lubricant supplying member 50 is impregnated with a large amount of lubricant and is made of a material that is easily elastically deformed.

[0020] The lubricant supply member 50 has a pair of left and right sleeve portions 50A extending in the vertical direction, and a connecting portion 50B connecting the upper ends of the sleeve portions 50A, and is formed in an approximately C-shape facing the upper surface and both side surfaces of the guide rail 20.

[0021] The connection portion 50B of the lubricant supply member 50 has a first recess 51 recessed downward at the center of the upper edge of the connection portion 50B in the left-right direction, and a pair of second recesses 52, 52 disposed on the left and right outer sides of the first recess 51 and recessed downward at the upper edge of the connection portion 50B. In the illustrated example, the first recess 51 has a greater vertical depth and a greater horizontal width than the second recess.

[0022] The second recess 52 has a bottom portion that forms a recessed surface and a pair of edges that rise up and down from the bottom portion, and in particular, the outer left and right edges form a pressed portion 52a that is a flat surface that is pressed outward to the left and right by the case 40.

[0023] The connection portion 50B of the lubricant supplying member 50 is formed with a first thin-walled portion 53 and a pair of second thin-walled portions 54, 54. The first thin-walled portion 53 is a portion in the left-right center of the connection portion 50B where the thickness T1 in the vertical direction is reduced due to the formation of the first recess 51. The second thin-walled portions 54 are portions on both left and right sides of the connection portion 50B where the thickness T2 in the vertical direction is reduced due to the formation of the second recess 52. In other words, the second thin-walled portions are located near the inner corners of the lubricant supplying member 50, which is formed in a U-shape with an open bottom along the guide rail 20. In this case, due to the relationship between the first recess 51 and the second recess 52, the thickness T1 of the first thin-walled portion 53 is thinner than the thickness T2 of the second thin-walled portion 54 (T1<T2). This configuration can be seen in FIGS. 3 and 5 .

[0024] The sleeve portion 50A of the lubricant supply member 50 is formed with protrusions 55 that protrude trapezoidally from the left and right inner sides toward the side of the guide rail 20, and a third recess 56 that is formed by cutting out both the left and right outer surfaces of the sleeve portion 50A inward toward the left and right toward the guide rail 20.

[0025] The protruding portion 55 supplies lubricant via a first abutment portion 55A that abuts against the rail-side upper raceway surface 21 a and a second abutment portion 55B that abuts against the rail-side lower raceway surface 21 b. The first abutment portion 55A is an inclined surface that slopes downward from the upper portion of the protruding portion 55 toward the left and right inner side, and is an abutment surface that faces the rail-side upper raceway surface 21 a of the guide rail 20 and is in surface contact with the rail-side upper raceway surface 21 a. The second abutment portion 55B is an inclined surface that slopes upward from the lower portion of the protruding portion 55 toward the left and right inner side, and is an abutment surface that faces the rail-side lower raceway surface 21 b of the guide rail 20 and is in surface contact with the rail-side lower raceway surface 21 b.

[0026] The first contact portion 55A and the second contact portion 55B are formed in a linear shape that matches the opposing rail-side raceway surface 21, and when the protruding portion 55 of the lubricant supplying member 50 is engaged with the side surface of the guide rail 20, they are pressed against the rail-side raceway surface 21 with an interference of a predetermined magnitude or more. This configuration can be seen in Figure 3. The first contact portion 55A and the second contact portion 55B may also be formed in a gentle arc shape that protrudes toward the rail-side raceway surface 21.

[0027] As a result, when the protruding portion 55 is pressed toward the guide rail 20, the first abutment portion 55A comes into contact with most of the rail-side upper raceway surface 21 a, and supplies lubricant evenly to the entire rail-side upper raceway surface 21 a. Similarly, when the protruding portion 55 is pressed toward the guide rail 20, the second abutment portion 55B comes into contact with most of the rail-side lower raceway surface 21 b, and supplies lubricant evenly to the entire rail-side lower raceway surface 21 b.

[0028] (Case 40) The case 40 is made by injection molding a hard resin such as polyacetal or polyamide, and is formed in a generally U-shape with approximately the same size as the end cap 32. The case 40 may also be made by cutting or pressing a metal material such as steel or aluminum.

[0029] The case 40 has an outer peripheral wall 41 that covers the outer periphery of the lubricant supplying member 50 and an inner wall 42 that covers one axial end of the lubricant supplying member 50. The case 40 defines a substantially U-shaped housing portion 43 that fits and houses the lubricant supplying member 50. This configuration can be seen in FIG. 4 .

[0030] The outer peripheral wall 41 is formed in a generally U-shape and covers the upper surface, the outer sides of both side surfaces, and the lower end surface of the lubricant supplying member 50. The outer peripheral wall 41 has a cylindrical first mounting portion 45 located on the inner surface side of the center of the upper edge, a pair of second mounting portions 46, 46 located on both left and right sides of the first mounting portion 45, and a pair of cylindrical third mounting portions 47, 47 located on the inner surfaces of both left and right edges.

[0031] The first mounting portion 45 is accommodated in a first recess 51 formed in the connecting portion 50B of the lubricant supplying member 50. An insertion hole 45a, through which a grease nipple (not shown) or the like is inserted, is formed in the first mounting portion 45 along the axial direction. In this embodiment, as shown in Figures 3 and 7, the first mounting portion 45 is configured not to come into contact with the first recess 51. However, the first mounting portion 45 may also be configured to come into slight contact with the first recess 51.

[0032] The pair of third mounting portions 47, 47 are respectively housed in third recesses 56, 56 formed in the sleeve portion 50A of the lubricant supplying member 50. The third mounting portion 47 has an insertion hole 47a formed along the axial direction, through which a fastener (not shown) is inserted to fix the case 40 to the end cap 32 or the like. In this embodiment, as shown in FIG. 3 , the third mounting portion 47 is configured not to come into contact with the third recess 56.

[0033] The pair of second mounting portions 46, 46 are inserted into and housed in the second recesses 52, 52 of the lubricant supplying member 50. The second mounting portions 46 have insertion holes 46b formed along the axial direction, through which fasteners (not shown) are inserted to secure the case 40 to the end cap 32 or the like. The pair of second mounting portions 46, 46 protrude outward to the left and right, and pressing portions 46a are formed at the tips of the protruding portions to press outward to the left and right pressed portions 52a, which are the edges of the second recesses 52. The pressing portions 46a have smooth arcuate surfaces that press the flat pressed portions 52a outward to the left and right. This configuration can be seen in FIGS. 3 and 6.

[0034] The width W1 in the left-right direction between the pair of pressing portions 46a, 46a formed on each second mounting portion 46 is wider than the width W2 in the left-right direction between the pair of pressed portions 52a, 52a of the second recess 52 pressed by each pressing portion 46a (W1 > W2). This allows the pair of pressing portions 46a, 46a to reliably and stably press the pair of pressed portions 52a, 52a in a direction separating them outward in the left-right direction. This configuration can be seen in Figures 3 to 5.

[0035] The inner wall 42 covers the end face of the lubricant supplying member 50 housed in the case 40 on the axial side of the end cap 32. The inner wall 42 is connected to a first mounting portion 45 extending in the axial direction, a pair of second mounting portions 46, 46, and a pair of third mounting portions 47, 47, and positions the lubricant supplying member 50 housed in the housing portion 43. In other words, the case 40 can house the lubricant supplying member 50 in the housing portion 43 with the protruding portion 55 on the inside of the sleeve portion 50A of the lubricant supplying member 50 facing the guide rail 20 exposed.

[0036] (Action and effect)

[0037] According to the above-described configuration, the case 40 accommodating the lubricant supplying member 50 can use the pair of pressing portions 46 a to press the pressed portions 52 a formed on the connecting portion 50B side of the lubricant supplying member 50 outward in the lateral directions, thereby pressing the protruding portions 55 formed on the pair of sleeve portions 50A inward in the lateral directions toward the rail-side track surface 21 of the guide rail 20. At this time, by arranging the pair of pressed portions 52 a above and outward in the lateral directions of the first thin-walled portion 53 and by positioning the pair of pressed portions 52 a near the inner corners of the U-shaped lubricant supplying member 50, it is possible to prevent the first thin-walled portion 53 and the second thin-walled portion 54 of the connecting portion 50B of the lubricant supplying member 50 from deforming more than necessary and absorbing the amount of inward deformation of the pair of sleeve portions 50A. In other words, the lubricant supply member 50 can be efficiently deformed by the above-mentioned pressing portion 46a and pressed portion 52a, thereby maintaining stable contact between the protruding portion 55 and the rail-side track surface 21 and enabling a stable supply of lubricant to the rail-side track surface 21.

[0038] Next, the operation and effect of the linear guide of the first embodiment will be described in more detail with reference to Figs. 8 to 11, while comparing it with a comparative example. Fig. 8 is a front view showing a lubricant supplying member housed in a case of the comparative example. Fig. 9 is a model diagram showing the deformation state of the lubricant supplying member when the case of the comparative example is used. Fig. 10 is a model diagram showing the deformation state of the lubricant supplying member when the case of the first embodiment is used. Fig. 11 is a graph showing the relationship between the load applied to the pressed portion and the amount of pressing of the protruding portion in the first embodiment and the comparative example.

[0039] 8 , in the case 70 of the comparative example, instead of the first mounting portion 45 of the first embodiment, a fourth mounting portion 71 is provided, which has a pair of pressing portions 71 a that press the first recess 51 of the lubricant supplying member 50 outward to the left and right. Also, instead of the pair of second mounting portions 46 of the first embodiment, fifth mounting portions 72 are provided that do not come into contact with and do not press the pressed portion 52 a of the second recess 52 of the lubricant supplying member 50.

[0040] 8 and 9 are views showing only the right half of the lubricant supplying member 50, with the deformation amount of the lubricant supplying member 50 deformed by the pressing portions 46a and 71a on the case side increased by four times. As shown in Fig. 8, when the comparative case 70 is used, the pressing portion 71a presses the edges of the first recess 51 outward to the left and right, causing the connection portion 50B of the lubricant supplying member 50 to move upward as the first thin-walled portion 53 deforms. It can be seen that this movement amount is significantly larger than that of the example of the first embodiment shown in Fig. 10.

[0041] 11 also compares the magnitude of the load applied to the rail-side raceway surface 21 with the amount of pressing of the lubricant supplying member 50 by the pressing portions 46a, 71a. Here, the amount of pressing represents the amount of left-right displacement applied to the lubricant supplying member 50 by the pressing portions 46a, 71a. As shown in FIG. 11 , with the case 40 of the first embodiment, the load applied to the rail-side raceway surface 21 is significantly greater than with the case 70 of the comparative example, given the same amount of pressing of the lubricant supplying member 50 by the pressing portion 46a. That is, with the case 40 of the first embodiment, the protruding portion 55 of the lubricant supplying member 50 can be firmly pressed against the rail-side raceway surface 21, making it possible to more reliably apply lubricant to the rail-side raceway surface 21. To summarize the above, according to this embodiment, even if thin-walled portions 53, 54 are formed at the connection portion 50B of the lubricant supply member 50, by arranging the pressing portion 46a above and on the left and right outer sides of the thin-walled portions 53, 54, the lubricant supply member 50 can be deformed so that the protrusion portion 55 is sufficiently pressed against the rail-side track surface 21.

[0042] 12 is a front view showing a lubricant supplying member housed in a case according to a second embodiment. As shown in FIG. 12 , a case 80 according to the second embodiment has second pressing portions 81 on an outer peripheral wall 41 on which a third attachment portion 47 is formed, the second pressing portions 81 pressing the left and right side surfaces of the lubricant supplying member 50 housed in the case 80 inward in the left-right direction.

[0043] In the illustrated example, a pair of second pressing portions 81 are provided, one above the other, to sandwich the third mounting portion 47 between them, and are protruding pieces that protrude inward in the left-right direction in a smooth arc (dome) shape from the inner peripheral surface of the outer peripheral wall 41. A pair of second pressing portions 81 are provided, one on the left and one on the right, corresponding to the pair of left and right third mounting portions 47.

[0044] According to this configuration, the sleeve portion 50A of the lubricant supply member 50 can be reliably and stably deformed by the second pressing portions 81 provided on the left and right sides so as to press the pair of protrusions 55 against the rail-side track surface 21.

[0045] The present invention is not limited to the above-described embodiments, and modifications and improvements are possible as appropriate.

[0046] As described above, this specification discloses the following: (1) A linear guide comprising: a guide rail having a raceway surface along the longitudinal direction, a slider slidably engaging with the guide rail so as to straddle the guide rail and having rolling elements that roll on the raceway surface, and a case attached to an axial end of the slider, accommodating a lubricant supplying member impregnated with a lubricant and pressing the lubricant supplying member into contact with the raceway surface, wherein the lubricant supplying member has a pair of sleeves having a contact portion that is pressed against the raceway surface, and a connecting portion that connects upper portions of the pair of sleeves and is positioned above the guide rail, and the connecting portion has at least one thin-walled portion that is thinned in the up-down direction, and a pressed portion that is positioned above the thin-walled portion and on the left-right outer side, and is pressed outward to the left and right by a pressing portion provided on the case. According to this configuration, by pressing the pressed portion outward to the left and right with the pressing portion, even if the lubricant supply member has a thin-walled portion formed at the connection portion connecting the pair of sleeve portions, the sleeve portion of the lubricant supply member can be stably deformed toward the guide rail, and contact between the sleeve portion of the lubricant supply member and the rail-side track surface can be maintained.

[0047] (2) The linear guide according to (1), wherein the thin-walled portion is formed below a recessed portion formed by recessing an upper edge of the connecting portion downward. According to this configuration, even if the lubricant supply member housed in the case has a recessed portion cut out in accordance with an attachment portion or the like arranged in the case and a thin-walled portion formed by the recessed portion, the lubricant supply member can be deformed stably, thereby improving versatility.

[0048] (3) The linear guide according to (1) or (2), wherein the pressing portion and the pressed portion are provided as a pair on the left and right sides so as to sandwich the thin-walled portion arranged in the left-right central portion of the connecting portion. According to this configuration, the pair of sleeve portions deform in a direction sandwiching the guide rail, so that the pair of abutment portions formed on the sleeve portions and the track surface are stably maintained in contact with each other.

[0049] (4) The linear guide according to (3), wherein the width W1 between the pair of pressing portions in the left-right direction is greater than the width W2 between the pair of pressed portions in the left-right direction. With this configuration, the pair of pressing portions can reliably and stably press the pair of pressed portions 52 a, 52 a in a direction separating them outward in the left-right direction. This allows the left and right sides of the upper portion of the lubricant supply member to be stably deformed so as to be pushed outward in the left-right direction.

[0050] Although various embodiments have been described above with reference to the drawings, it goes without saying that the present invention is not limited to such examples. It is clear that a person skilled in the art can conceive of various modifications or alterations within the scope of the claims, and it is understood that these also naturally fall within the technical scope of the present invention. Furthermore, the components of the above-described embodiments may be combined in any manner without departing from the spirit of the invention.

[0051] This application is based on a Japanese patent application (Patent Application No. 2024-097359) filed on June 17, 2024, the contents of which are incorporated herein by reference.

[0052] 10 Linear guide 20 Guide rail 21 Rail-side raceway surface 21a Rail-side upper raceway surface 21b Rail-side lower raceway surface 30 Slider 31 Slider body 32 End cap 33 Lubrication unit 34a Slider-side upper raceway surface 34b Slider-side lower raceway surface 35 Sleeve portion 36a Rolling element return path 36b Rolling element return path 40 Case 41 Outer peripheral wall 42 Inner wall 43 Storage portion 45 First mounting portion 45a Insertion hole 46 Second mounting portion 46a Pressing portion 46b Insertion hole 47 Third mounting portion 47a Insertion hole 50 Lubricant supply member 50A Sleeve portion 50B Connection portion 51 First recess 52 Second recess 52a Pressed portion 53 First thin-walled portion (thin-walled portion) 54 Second thin portion 55 Protruding portion 55A First contact portion (contact portion) 55B Second contact portion (contact portion) 56 Third recess 60 Side seal 70 Case 71 Fourth mounting portion 71a Pressing portion 72 Fifth mounting portion 80 Case 81 Second pressing portion

Claims

1. A linear guide comprising: a guide rail having a raceway surface along the longitudinal direction; a slider slidably engaging across said guide rail and having rolling elements that roll on said raceway surface; and a case attached to the axial end of said slider, accommodating a lubricant supply member impregnated with lubricant, and pressing said lubricant supply member into contact with said raceway surface, wherein said lubricant supply member has a pair of sleeve portions having a contact portion that is pressed against said raceway surface, and a connecting portion that connects upper portions of the pair of sleeve portions and is positioned above said guide rail, and said connecting portion has at least one thin-walled portion that is thinned in the up-down direction, and a pressed portion that is positioned above and to the left and right outside of said thin-walled portion and is pressed outward to the left and right by a pressing portion provided on said case.

2. The linear guide according to claim 1, wherein the thin-walled portion is formed below a recessed portion formed by recessing the upper edge of the connecting portion downward.

3. A linear guide according to claim 1 or 2, wherein the pressing portion and the pressed portion are provided as a pair on the left and right sides so as to sandwich the thin-walled portion located in the left-right center of the connecting portion.

4. The linear guide according to claim 3, wherein the width W1 in the left-right direction between the pair of pressing portions is larger than the width W2 in the left-right direction between the pair of pressed portions.

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