WO2023074087A1 - Linear motion guide unit - Google Patents

Linear motion guide unit Download PDF

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Publication number
WO2023074087A1
WO2023074087A1 PCT/JP2022/030871 JP2022030871W WO2023074087A1 WO 2023074087 A1 WO2023074087 A1 WO 2023074087A1 JP 2022030871 W JP2022030871 W JP 2022030871W WO 2023074087 A1 WO2023074087 A1 WO 2023074087A1
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WO
WIPO (PCT)
Prior art keywords
hole
casing
rail
longitudinal direction
pair
Prior art date
Application number
PCT/JP2022/030871
Other languages
French (fr)
Japanese (ja)
Inventor
直樹 菊池
Original Assignee
日本トムソン株式会社
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Filing date
Publication date
Application filed by 日本トムソン株式会社 filed Critical 日本トムソン株式会社
Publication of WO2023074087A1 publication Critical patent/WO2023074087A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/48—Cages for rollers or needles for multiple rows of rollers or needles

Definitions

  • the present disclosure relates to linear guide units.
  • This application claims priority based on Japanese application No. 2021-175247 filed on October 27, 2021, and incorporates all the descriptions described in the Japanese application.
  • Patent Document 1 discloses a rolling element holding member in which both ends in the longitudinal direction are bent substantially vertically.
  • the holding member has bent portions that are fitted into concave portions formed on both longitudinal end surfaces of the casing, and holds the ball, which is a rolling element, with respect to the casing.
  • Patent Document 2 discloses a linear motion guide unit that includes a holding member that holds cylindrical rollers, which are rolling elements, to a casing, and a fixing band that fixes the holding member to an end cap.
  • a concave band groove is formed in the inner surface of the holding member facing the rail side, and the fixing band is fitted in the band groove.
  • the band groove extends outward in the width direction from the inner surface (surface facing the rail side) of the holding member. should be deeply formed. For this reason, it becomes difficult to miniaturize the holding member, and it becomes difficult to dispose a large-sized rolling element between the casing and the holding member. Therefore, in the conventional linear motion guide unit, since it is difficult to employ rolling elements having a large size, there is room for improvement in load bearing performance.
  • An object of the present disclosure is to provide a linear guide unit capable of improving load bearing performance.
  • a linear motion guide unit includes a rail, a casing movable along the longitudinal direction of the rail, and a plurality of rollers disposed between the rail and the casing so as to be able to roll while contacting the rail and the casing.
  • a moving body and a pair of direction changing members arranged at both longitudinal ends of the casing are provided.
  • the rail includes a pair of rail-side rolling surfaces that are arranged on both sides in the width direction perpendicular to the longitudinal direction and extend in the longitudinal direction.
  • the casing includes a casing body and a pair of sleeves connected to both widthwise sides of the casing body.
  • casing-side rolling bearings which face the pair of rail-side rolling surfaces and extend in the longitudinal direction form a pair of rolling element rolling paths with the pair of rail-side rolling surfaces. faces are formed.
  • the casing is formed with a pair of return paths, which are through holes extending longitudinally along each of the pair of rail-side rolling surfaces and penetrating the casing longitudinally.
  • a direction changing path connecting the rolling element rolling path and the return path is formed in the pair of direction changing members.
  • the rolling elements circulate on an annular orbit formed by the rolling element rolling path, the return path, and the direction changing path.
  • the linear motion guide unit further includes a pair of holding members that hold the rolling elements between them and the sleeve portions and extend in the longitudinal direction, and a support member that supports the holding members with respect to the direction changing member.
  • the holding member is formed with a first hole that opens to a first end face, which is one end face in the longitudinal direction.
  • the direction changing member facing the first end face is formed with a second hole that communicates with the first hole and penetrates the direction changing member in the longitudinal direction. The support member is inserted into the first hole and the second hole.
  • FIG. 1 is a perspective view showing the overall configuration of a linear motion guide unit according to the embodiment.
  • FIG. 2 is a perspective view showing a state in which the slider in the embodiment is disassembled in the longitudinal direction.
  • FIG. 3 is a front view of the casing in the embodiment as seen in the longitudinal direction.
  • FIG. 4 is a diagram showing the internal structure of the end cap.
  • FIG. 5 is a perspective sectional view showing the internal structure of the slider.
  • FIG. 6 is a perspective cross-sectional view showing the internal structure of the slider according to the second embodiment.
  • FIG. 7 is a front view of a slider in another embodiment as viewed in the longitudinal direction.
  • a linear motion guide unit includes a rail, a casing movable along the longitudinal direction of the rail, and a plurality of rollers disposed between the rail and the casing so as to be able to roll while contacting the rail and the casing.
  • a moving body and a pair of direction changing members arranged at both longitudinal ends of the casing are provided.
  • the rail includes a pair of rail-side rolling surfaces that are arranged on both sides in the width direction perpendicular to the longitudinal direction and extend in the longitudinal direction.
  • the casing includes a casing body and a pair of sleeves connected to both widthwise sides of the casing body.
  • casing-side rolling bearings which face the pair of rail-side rolling surfaces and extend in the longitudinal direction form a pair of rolling element rolling paths with the pair of rail-side rolling surfaces. faces are formed.
  • the casing is formed with a pair of return paths, which are through holes extending longitudinally along each of the pair of rail-side rolling surfaces and penetrating the casing longitudinally.
  • a direction changing path connecting the rolling element rolling path and the return path is formed in the pair of direction changing members.
  • the rolling elements circulate on an annular orbit formed by the rolling element rolling path, the return path, and the direction changing path.
  • the linear motion guide unit further includes a pair of holding members that hold the rolling elements between them and the sleeve portions and extend in the longitudinal direction, and a support member that supports the holding members with respect to the direction changing member.
  • the holding member is formed with a first hole that opens to a first end face, which is one end face in the longitudinal direction.
  • the direction changing member facing the first end face is formed with a second hole that communicates with the first hole and penetrates the direction changing member in the longitudinal direction. The support member is inserted into the first hole and the second hole.
  • the holding member is formed with the first hole that opens to the first end surface, and the direction changing member is formed with the second hole that communicates with the first hole and penetrates in the longitudinal direction.
  • the holding member is supported with respect to the direction changing member by inserting the supporting member into the first hole and the second hole. Therefore, in the above-described linear motion guide unit, since it is not necessary to form a band groove in the holding member, the holding member can be made more compact than the conventional one. Therefore, according to the linear motion guide unit, since the rolling elements having a larger size can be arranged between the holding member and the sleeve portion of the casing, the load bearing performance of the linear motion guide unit can be improved. .
  • the first hole may be formed so as to pass through the holding member in the longitudinal direction.
  • the holding member has a first hole having a bottom inside the holding member and a second end face opposite to the first end face, which is open and spaced apart from the first hole.
  • a third hole having a bottom therein may be formed. According to this configuration, the strength of the holding member can be increased compared to the case where the first hole is formed over the entire length of the holding member.
  • the first hole and the second hole in a cross section perpendicular to the longitudinal direction, have a shape in which the length in the vertical direction orthogonal to both the longitudinal direction and the width direction is longer than the length in the width direction.
  • the first hole and the second hole may have According to this configuration, compared to the case where both the first hole and the second hole are elongated in the width direction, it is possible to ensure a wider space for arranging the rolling elements between the holding member and the sleeve portion of the casing. can be done. As a result, it becomes possible to employ rolling elements having a larger size, and the load bearing performance of the linear motion guide unit can be further enhanced. Moreover, it is possible to prevent the holding member from rotating with respect to the direction changing member.
  • FIG. 1 is a perspective view showing the overall configuration of a linear guide unit 1.
  • FIG. FIG. 2 is a perspective view showing a state in which the slider 20 is disassembled in the longitudinal direction D1.
  • FIG. 3 is a front view of the casing 21 viewed in the longitudinal direction D1.
  • FIG. 4 is a view partially showing the internal structure of the first end cap 22.
  • FIG. 5 is a perspective sectional view showing the internal structure of the slider 20. As shown in FIG.
  • the linear motion guide unit 1 mainly includes a rail 10 and a slider 20.
  • the rail 10 extends linearly in the longitudinal direction D1.
  • the sliders 20 are attached to the rails 10 so as to sandwich the rails 10 from both sides in the width direction D2.
  • the slider 20 is movable (slidable) along the longitudinal direction D ⁇ b>1 of the rail 10 .
  • the slider 20 includes a casing 21 and a pair of direction changing members (first end cap 22 and second end cap 23). As shown in FIG. 1, the first end cap 22 and the second end cap 23 are arranged at both ends of the casing 21 in the longitudinal direction D1.
  • the rail 10 includes a first rail surface 15, a second rail surface 16, and a pair of rail side rolling surfaces (first rail side rolling surface 11 and second rail side rolling surface 12). ) and
  • the first rail surface 15 is a surface facing the casing 21 side.
  • the second rail surface 16 is a surface facing away from the first rail surface 15 in the vertical direction D3 (the direction perpendicular to both the longitudinal direction D1 and the width direction D2).
  • the first rail-side rolling surface 11 and the second rail-side rolling surface 12 are arranged on both sides of the rail 10 in the width direction D2 (the direction perpendicular to both the longitudinal direction D1 and the vertical direction D3).
  • the first rail surface 15, the second rail surface 16, the first rail side rolling surface 11, and the second rail side rolling surface 12 each extend in the longitudinal direction D1.
  • the first rail-side raceway surface 11 and the second rail-side raceway surface 12 are inclined with respect to both the width direction D2 and the vertical direction D3.
  • two first rail-side rolling surfaces 11 and two second rail-side rolling surfaces 12 are formed side by side in the vertical direction D3, but the present invention is not limited to this.
  • the casing 21 includes a casing body 24 and a pair of sleeves (first sleeve 25 and second sleeve 26).
  • the casing main body 24 extends linearly in the width direction D2 when viewed in the longitudinal direction D1.
  • the casing body 24 has a first end portion 24A located outside the rails 10 in the width direction D2 and a second end portion 24B located outside the rails 10 in the width direction D2 and opposite to the first end portion 24A. including.
  • the pair of sleeves are connected to both sides of the casing body 24 in the width direction D2.
  • the first sleeve portion 25 extends in the vertical direction D3 from the first end portion 24A so as to approach the second rail surface 16.
  • the second sleeve portion 26 extends in the vertical direction D3 so as to approach the second rail surface 16 from the second end portion 24B.
  • the casing main body 24 includes a first casing surface 36 facing the first rail surface 15 and a second casing surface 35 opposite to the first casing surface 36 in the vertical direction D3.
  • a pair of casing-side rolling surfaces (first casing-side rolling surface 31 and second casing-side rolling surface 32) facing the pair of rail-side rolling surfaces is formed on the pair of sleeve portions.
  • the first casing side rolling surface 31 is parallel to the first rail side rolling surface 11 and extends in the longitudinal direction D1.
  • the second casing side rolling surface 32 is parallel to the second rail side rolling surface 12 and extends in the longitudinal direction D1.
  • two first casing side rolling surfaces 31 and two second casing side rolling surfaces 32 are formed side by side in the vertical direction D3. not.
  • the casing 21 includes a casing end surface 37 that is an end surface in the longitudinal direction D1.
  • the first end cap 22 and the second end cap 23 (FIG. 1) are arranged to contact the casing end face 37 .
  • the first sleeve portion 25 includes a first casing side surface 38 facing away from the rail 10 in the width direction D2.
  • the second sleeve portion 26 includes a second casing side surface 39 facing away from the rail 10 in the width direction D2.
  • the linear motion guide unit 1 includes a plurality of rolling elements (first rolling element 41 and second rolling element 41) disposed between the rail 10 and the casing 21 so as to be able to roll while contacting the rail 10 and the casing 21. 2 rolling elements 42).
  • the first casing-side rolling surface 31 forms a first rolling-element rolling path (one of the pair of rolling-element rolling paths) with the first rail-side rolling surface 11 .
  • a plurality of first rolling elements 41 are arranged side by side in the longitudinal direction D1 on the first rolling element rolling path.
  • the first rolling element 41 is a cylindrical roller, and the outer peripheral surface is in contact with the first rail-side rolling surface 11 and the first casing-side rolling surface 31 .
  • the second casing side rolling surface 32 forms a second rolling element rolling path (the other of the pair of rolling element rolling paths) with the second rail side rolling surface 12 .
  • a plurality of second rolling elements 42 are arranged side by side in the longitudinal direction D1 on the second rolling element rolling path.
  • the second rolling element 42 is a cylindrical roller, and the outer peripheral surface is in contact with the second rail-side rolling surface 12 and the second casing-side rolling surface 32 .
  • a pair of return paths (a first return path 51 and a second return path 52) are formed in the casing 21.
  • the pair of return paths are through holes extending in the longitudinal direction D1 along the pair of rail-side rolling surfaces, respectively, and penetrating the casing 21 in the longitudinal direction D1.
  • the first return path 51 is a circular through-hole when viewed in the longitudinal direction D1
  • the first sleeve portion 25 extends longitudinally from one casing end surface 37 to the other casing end surface 37. As shown in FIG. It penetrates D1.
  • two first return paths 51 are formed side by side in the vertical direction D3 in the first sleeve portion 25 in the present embodiment, the present invention is not limited to this.
  • the second return path 52 is a circular through hole when viewed in the longitudinal direction D1.
  • the second return path 52 penetrates the second sleeve portion 26 in the longitudinal direction D1 from one casing end face 37 to the other casing end face 37 .
  • two second return paths 52 are formed side by side in the vertical direction D3 in the second sleeve portion 26 in the present embodiment, the present invention is not limited to this.
  • a circular opening, which is the end portion in the longitudinal direction D1 of the first return path 51, is formed in the end surface of the first sleeve portion 25 in the longitudinal direction D1.
  • the end face of the second sleeve portion 26 in the longitudinal direction D1 is formed with a circular opening that is the end portion of the second return path 52 in the longitudinal direction D1.
  • FIG. 4 partially shows the surface of the first end cap 22 (FIGS. 1 and 2) facing the casing 21 side.
  • the first end cap 22 is formed with a first direction changing path 61 that connects the first rolling element rolling path and the first return path 51 (FIG. 3). More specifically, referring to FIG. 3, the first rolling element rolling path, which is closer to the first rail surface 15 of the two upper and lower first rolling element rolling paths, and the two upper and lower first return paths. The first return path 51 farther from the first rail surface 15 among the 51 is connected by one first direction changing path 61 (FIG. 4).
  • first rolling element rolling path farther from the first rail surface 15 of the two upper and lower first rolling element rolling paths, and the one closer to the first rail surface 15 of the two upper and lower first return paths 51 and the first return path 51 are connected by the other first direction change path 61 (FIG. 4).
  • the second end cap 23 (FIGS. 1 and 2) also has a first direction changing path.
  • the slider 20 moves linearly along the longitudinal direction D1 of the rail 10
  • the first rolling elements 41 move along the first rolling element rolling path, the first return path 51 and the first direction. It circulates on an annular orbit formed by the conversion path 61 .
  • the first end cap 22 and the second end cap 23 have a second direction changing path connecting the second rolling element rolling path and the second return path 52 (FIG. 3) in the first direction. It is formed similarly to the conversion path 61 (FIG. 4). Therefore, as the slider 20 moves linearly along the longitudinal direction D1 of the rail 10, the second rolling elements 42 (FIG. 3) move along the second rolling element rolling path, the second return path 52, and the second rolling element rolling path. It circulates on an annular orbit formed by the second turning path.
  • the linear motion guide unit 1 further includes a pair of holding members (first holding member 70 and second holding member 71) (Figs. 2, 3 and 5). As shown in FIG. 2, the first holding member 70 and the second holding member 71 extend in the longitudinal direction D1 and have a substantially triangular shape when viewed in the longitudinal direction D1. As shown in FIG. 3 , the first holding member 70 sandwiches the first rolling element 41 with the first sleeve portion 25 . More specifically, one end surface of the first rolling element 41 in the direction in which the rolling shaft extends contacts the inner surface of the first sleeve portion 25 in the width direction D2, and the other end surface in the direction is the first holding member. It contacts the member 70 (substantially triangular hypotenuse in FIG. 3).
  • the second holding member 71 sandwiches the second rolling element 42 with the second sleeve portion 26 .
  • one end surface of the second rolling element 42 in the direction in which the rolling shaft extends contacts the inner surface of the second sleeve portion 26 in the width direction D2, and the other end surface in the direction is the second holding member. 71 (substantially triangular hypotenuse in FIG. 3).
  • the first holding member 70 is provided between one first rail-side rolling surface 11 and the other first rail-side rolling surface 11 of the side surfaces of the rail 10 in the width direction D2. It is arranged in the space (recess).
  • the second holding member 71 is a space (recess) between one of the side surfaces of the rail 10 in the width direction D2 and between the second rail side rolling surface 12 and the other second rail side rolling surface 12 . are placed in
  • the second holding member 71 is formed with a first hole 91 opening to a first end face, which is one end face in the longitudinal direction D1, and a second end face opposite to the first end face.
  • a third hole 93 is formed which opens to the outside and is separated from the first hole 91 in the longitudinal direction D1.
  • a portion of the second holding member 71 between the first hole 91 and the third hole 93 is a solid portion without holes.
  • the first hole 91 and the third hole 93 are bottomed holes having bottoms inside the second holding member 71, and have approximately the same depth (length) in the longitudinal direction D1.
  • the first holding member 70 has the same configuration as the second holding member 71, and a first hole 91 and a third hole 93 are formed at both ends in the longitudinal direction D1.
  • the first end cap 22 (the direction-changing member of the pair of direction-changing members facing the first end surface) has a second hole extending through the first end cap 22 in the longitudinal direction D1. 92 are formed.
  • the second hole 92 has substantially the same size and shape as the first hole 91 when viewed in the longitudinal direction D1.
  • the second hole 92 communicates with the first hole 91 when the first end cap 22 is attached to the casing 21 (in contact with the casing end face 37).
  • the second end cap 23 (the direction changing member of the pair of direction changing members facing the second end surface) is formed with a fourth hole 94 penetrating the second end cap 23 in the longitudinal direction D1. ing.
  • the fourth hole 94 has substantially the same size and shape as the third hole 93 when viewed in the longitudinal direction D1.
  • the fourth hole 94 communicates with the third hole 93 when the second end cap 23 is attached to the casing 21 (in contact with the casing end surface 37).
  • the first hole 91 in the present embodiment has a shape in which the length in the vertical direction D3 is longer than the length in the width direction D2 in a cross section perpendicular to the longitudinal direction D1 (FIGS. 3 and 5). More specifically, the first hole 91 in the present embodiment has a rectangular shape elongated in the vertical direction D3 when viewed in the longitudinal direction D1.
  • the second hole 92 in the present embodiment has a shape in which the length in the vertical direction D3 is longer than the length in the width direction D2 in a cross section perpendicular to the longitudinal direction D1 (Fig. 4). More specifically, the second hole 92 in the present embodiment has a rectangular shape elongated in the vertical direction D3 when viewed in the longitudinal direction D1. Note that, similarly to the first hole 91 and the second hole 92, the third hole 93 and the fourth hole 94 also have a shape in which the length in the vertical direction D3 is longer than the length in the width direction D2, for example, when viewed in the longitudinal direction D1. It has a rectangular shape elongated in the vertical direction D3.
  • the linear motion guide unit 1 includes a plurality of support members (a first support member 81, a second support member 82, a third support member 83 and a fourth support member 84 (FIG. 2).
  • the first to fourth support members 81 to 84 in this embodiment have a substantially L-shape, and are formed in bottomed holes formed in each holding member and in each end cap. is inserted into the through hole where
  • the outer surface of the first end cap 22 (the surface opposite to the casing 21) has a recess 22A into which the short side portions of the first support member 81 and the short side portions of the third support member 83 are fitted. formed.
  • the outer surface of the second end cap 23 (the surface opposite to the casing 21) is also formed with recesses (not shown) into which the short sides of the second support member 82 and the short sides of the fourth support member 84 are fitted. It is Note that this concave portion is not an essential configuration and may be omitted. Further, the first to fourth support members 81 to 84 are not limited to L-shaped members, and may be linearly extending members, for example.
  • the first support member 81 has its long sides inserted into a first hole 91 (bottomed hole) formed in the first holding member 70 and a second hole 92 (through hole) formed in the first end cap 22 .
  • the second support member 82 has its long sides inserted into a third hole 93 (bottomed hole) formed in the first holding member 70 and a fourth hole 94 (through hole) formed in the second end cap 23 .
  • the third support member 83 has its long sides inserted into a first hole 91 (bottomed hole) formed in the second holding member 71 and a second hole 92 (through hole) formed in the first end cap 22 .
  • the fourth support member 84 has long sides inserted into a third hole 93 (bottomed hole) formed in the second holding member 71 and a fourth hole 94 (through hole) formed in the second end cap 23 . ing.
  • the first hole 91 is formed in the first holding member 70 and the second holding member 71, communicates with the first hole 91, and extends in the longitudinal direction.
  • a second hole 92 is formed in the first end cap 22 through D1.
  • the linear motion guide unit 1 it is not necessary to form band grooves in the first holding member 70 and the second holding member 71, so the first holding member 70 and the second holding member 71 are It can be made smaller. Therefore, since rolling elements having a larger size can be arranged between the first holding member 70 and the second holding member 71 and the sleeve portion of the casing 21, the load bearing performance of the linear motion guide unit 1 can be improved. can be done.
  • Embodiment 2 is basically similar to Embodiment 1 above, but differs in the configuration of first holding member 70 and second holding member 71 . Only points different from the first embodiment will be described below.
  • FIG. 6 is a perspective cross-sectional view showing the internal structure of the slider 20 according to the second embodiment.
  • the first hole 91 is formed so as to penetrate the second holding member 71 over the entire longitudinal direction D1.
  • the first hole 91 is formed so as to pass through the first holding member 70 entirely in the longitudinal direction D1. Therefore, in Embodiment 2, since the first holding member 70 and the second holding member 71 have a hollow structure over the entire lengthwise direction D1, weight reduction of the members can be achieved.
  • first hole 91 and the second hole 92 have a rectangular shape elongated in the vertical direction D3 has been described as an example, but the present invention is not limited to this.
  • the first hole 91 and the second hole 92 may have a circular shape or a square shape when viewed in the longitudinal direction D1.
  • first rolling element 41 and the second rolling element 42 are cylindrical rollers
  • first rolling element 41 and the second rolling element 42 may be balls.
  • the first end cap 22 is formed with a first insertion hole 95 for inserting the first rolling element 41, and a first lid member 97 is arranged to close the first insertion hole 95.
  • the first end cap 22 is formed with a second insertion hole 96 for inserting the second rolling element 42, and even if a second lid member 98 is arranged to close the second insertion hole 96. good.
  • 1 linear motion guide unit 10 rail, 11 first rail side rolling surface, 12 second rail side rolling surface, 15 first rail surface, 16 second rail surface, 20 slider, 21 casing, 22 first end cap , 22A concave portion, 23 second end cap, 24 casing body, 24A first end portion, 24B second end portion, 25 first sleeve portion, 26 second sleeve portion, 31 first casing side rolling surface, 32 second Casing side rolling surface 35 Second casing surface 36 First casing surface 37 Casing end surface 38 First casing side surface 39 Second casing side surface 41 First rolling element 42 Second rolling element 51 First return path, 52 second return path, 61 first direction change path, 70 first holding member, 71 second holding member, 81 first supporting member, 82 second supporting member, 83 third supporting member, 84 fourth supporting member , 91 first hole, 92 second hole, 93 third hole, 94 fourth hole, 95 first input hole, 96 second input hole, 97 first lid member, 98 second lid member, D1 longitudinal direction, D2 Width direction, D3

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bearings For Parts Moving Linearly (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

This linear motion guide unit comprises a rail, a casing, a plurality of rolling bodies, and a pair of direction changing members. The rail includes rail-side rolling surfaces. The casing includes a casing body and arm portions. Casing-side rolling surfaces are formed on the arm portions. A return path is formed in the casing. A direction changing path connecting a rolling body rolling path and the return path is formed in the pair of direction changing members. The linear motion guide unit comprises a holding member for clamping the rolling bodies together with the arm portions, and a support member for supporting the holding member relative to the direction changing members. A first hole that opens at a first end surface is formed in the holding member. A second hole, which communicates with the first hole and penetrates the direction changing member in a lengthwise direction, is formed in the direction changing member which, among the pair of direction changing members, faces the first end surface. The support member is inserted into the first hole and the second hole.

Description

直動案内ユニットLinear guide unit
　本開示は、直動案内ユニットに関する。本出願は、２０２１年１０月２７日出願の日本出願第２０２１－１７５２４７号に基づく優先権を主張し、前記日本出願に記載された全ての記載内容を援用するものである。 The present disclosure relates to linear guide units. This application claims priority based on Japanese application No. 2021-175247 filed on October 27, 2021, and incorporates all the descriptions described in the Japanese application.
　従来から、レールとケーシングとの間に複数並べて配置される転動体を保持する保持部材を備えた直動案内ユニットが知られている。この種の技術が、例えば特許文献１および特許文献２に開示されている。 Conventionally, there has been known a linear guide unit provided with a holding member that holds a plurality of rolling elements arranged side by side between a rail and a casing. Techniques of this type are disclosed, for example, in Patent Document 1 and Patent Document 2.
　特許文献１には、長手方向の両端部が略垂直に折り曲げられた転動体の保持部材が開示されている。当該保持部材は、ケーシングの長手方向の両端面に形成された凹部に折り曲げ部が嵌め込まれ、転動体であるボールをケーシングに対して保持する。 Patent Document 1 discloses a rolling element holding member in which both ends in the longitudinal direction are bent substantially vertically. The holding member has bent portions that are fitted into concave portions formed on both longitudinal end surfaces of the casing, and holds the ball, which is a rolling element, with respect to the casing.
　特許文献２には、転動体である円筒ころをケーシングに対して保持する保持部材と、当該保持部材をエンドキャップに対して固定する固定バンドと、を備えた直動案内ユニットが開示されている。特許文献２では、保持部材のうちレール側を向く内側面に凹状のバンド溝が形成されており、当該バンド溝に固定バンドが嵌め込まれている。 Patent Document 2 discloses a linear motion guide unit that includes a holding member that holds cylindrical rollers, which are rolling elements, to a casing, and a fixing band that fixes the holding member to an end cap. . In Patent Document 2, a concave band groove is formed in the inner surface of the holding member facing the rail side, and the fixing band is fitted in the band groove.
特開平５－８７１３５号公報JP-A-5-87135 特開２００８－１１１４５８号公報JP 2008-111458 A
　特許文献２に開示される直動案内ユニットでは、保持部材から固定バンドが外れるのを防止するために、当該保持部材の内側面（レール側を向く面）から幅方向の外側に向かってバンド溝を深く形成する必要がある。このため、保持部材を小型化することが困難になり、サイズが大きい転動体をケーシングと保持部材との間に配置するのが困難になる。したがって、従来の直動案内ユニットでは、サイズが大きい転動体を採用するのが困難であるため、耐荷重性能について改善の余地がある。 In the linear motion guide unit disclosed in Patent Document 2, in order to prevent the fixing band from coming off the holding member, the band groove extends outward in the width direction from the inner surface (surface facing the rail side) of the holding member. should be deeply formed. For this reason, it becomes difficult to miniaturize the holding member, and it becomes difficult to dispose a large-sized rolling element between the casing and the holding member. Therefore, in the conventional linear motion guide unit, since it is difficult to employ rolling elements having a large size, there is room for improvement in load bearing performance.
　本開示の目的は、耐荷重性能を改善することが可能な直動案内ユニットを提供することである。 An object of the present disclosure is to provide a linear guide unit capable of improving load bearing performance.
　本開示に従った直動案内ユニットは、レールと、レールの長手方向に沿って移動可能なケーシングと、レールおよびケーシングの間にレールおよびケーシングに接触しつつ転走可能に配置される複数の転動体と、ケーシングの長手方向の両端に配置される一対の方向変換部材と、を備える。レールは、長手方向に垂直な幅方向の両側に配置され、長手方向に延びる一対のレール側転走面を含む。ケーシングは、ケーシング本体と、ケーシング本体の幅方向の両側に接続される一対の袖部と、を含む。上記一対の袖部には、上記一対のレール側転走面に対向するとともに長手方向に延び、上記一対のレール側転走面との間に一対の転動体転走路を形成するケーシング側転走面が形成されている。ケーシングには、上記一対のレール側転走面のそれぞれに沿って長手方向に延び、ケーシングを長手方向に貫通する貫通孔である一対のリターン路が形成されている。上記一対の方向変換部材には、上記転動体転走路とリターン路とを繋ぐ方向変換路が形成されている。転動体は、上記転動体転走路、リターン路および上記方向変換路によって形成される環状の軌道を循環する。上記直動案内ユニットは、転動体を上記袖部との間で挟持し、長手方向に延びる一対の保持部材と、保持部材を方向変換部材に対して支持する支持部材と、をさらに備える。保持部材には、長手方向の一方の端面である第１端面に開口する第１穴が形成されている。上記一対の方向変換部材のうち第１端面に対向する方向変換部材には、第１穴に連通し、方向変換部材を長手方向に貫通する第２穴が形成されている。支持部材は、第１穴および第２穴に挿入されている。 A linear motion guide unit according to the present disclosure includes a rail, a casing movable along the longitudinal direction of the rail, and a plurality of rollers disposed between the rail and the casing so as to be able to roll while contacting the rail and the casing. A moving body and a pair of direction changing members arranged at both longitudinal ends of the casing are provided. The rail includes a pair of rail-side rolling surfaces that are arranged on both sides in the width direction perpendicular to the longitudinal direction and extend in the longitudinal direction. The casing includes a casing body and a pair of sleeves connected to both widthwise sides of the casing body. In the pair of sleeves, casing-side rolling bearings which face the pair of rail-side rolling surfaces and extend in the longitudinal direction form a pair of rolling element rolling paths with the pair of rail-side rolling surfaces. faces are formed. The casing is formed with a pair of return paths, which are through holes extending longitudinally along each of the pair of rail-side rolling surfaces and penetrating the casing longitudinally. A direction changing path connecting the rolling element rolling path and the return path is formed in the pair of direction changing members. The rolling elements circulate on an annular orbit formed by the rolling element rolling path, the return path, and the direction changing path. The linear motion guide unit further includes a pair of holding members that hold the rolling elements between them and the sleeve portions and extend in the longitudinal direction, and a support member that supports the holding members with respect to the direction changing member. The holding member is formed with a first hole that opens to a first end face, which is one end face in the longitudinal direction. Of the pair of direction changing members, the direction changing member facing the first end face is formed with a second hole that communicates with the first hole and penetrates the direction changing member in the longitudinal direction. The support member is inserted into the first hole and the second hole.
　本開示によれば、耐荷重性能を改善することが可能な直動案内ユニットを提供することができる。 According to the present disclosure, it is possible to provide a linear guide unit capable of improving load bearing performance.
図１は、実施の形態に係る直動案内ユニットの全体構成を示す斜視図である。FIG. 1 is a perspective view showing the overall configuration of a linear motion guide unit according to the embodiment. 図２は、実施の形態におけるスライダが長手方向に分解された状態を示す斜視図である。FIG. 2 is a perspective view showing a state in which the slider in the embodiment is disassembled in the longitudinal direction. 図３は、実施の形態におけるケーシングを長手方向に見た正面図である。FIG. 3 is a front view of the casing in the embodiment as seen in the longitudinal direction. 図４は、エンドキャップの内部構造を示す図である。FIG. 4 is a diagram showing the internal structure of the end cap. 図５は、スライダの内部構造を示す斜視断面図である。FIG. 5 is a perspective sectional view showing the internal structure of the slider. 図６は、実施の形態２におけるスライダの内部構造を示す斜視断面図である。FIG. 6 is a perspective cross-sectional view showing the internal structure of the slider according to the second embodiment. 図７は、その他実施の形態におけるスライダを長手方向に見た正面図である。FIG. 7 is a front view of a slider in another embodiment as viewed in the longitudinal direction.
　［実施形態の概要］
　本開示に従った直動案内ユニットは、レールと、レールの長手方向に沿って移動可能なケーシングと、レールおよびケーシングの間にレールおよびケーシングに接触しつつ転走可能に配置される複数の転動体と、ケーシングの長手方向の両端に配置される一対の方向変換部材と、を備える。レールは、長手方向に垂直な幅方向の両側に配置され、長手方向に延びる一対のレール側転走面を含む。ケーシングは、ケーシング本体と、ケーシング本体の幅方向の両側に接続される一対の袖部と、を含む。上記一対の袖部には、上記一対のレール側転走面に対向するとともに長手方向に延び、上記一対のレール側転走面との間に一対の転動体転走路を形成するケーシング側転走面が形成されている。ケーシングには、上記一対のレール側転走面のそれぞれに沿って長手方向に延び、ケーシングを長手方向に貫通する貫通孔である一対のリターン路が形成されている。上記一対の方向変換部材には、上記転動体転走路とリターン路とを繋ぐ方向変換路が形成されている。転動体は、上記転動体転走路、リターン路および上記方向変換路によって形成される環状の軌道を循環する。上記直動案内ユニットは、転動体を上記袖部との間で挟持し、長手方向に延びる一対の保持部材と、保持部材を方向変換部材に対して支持する支持部材と、をさらに備える。保持部材には、長手方向の一方の端面である第１端面に開口する第１穴が形成されている。上記一対の方向変換部材のうち第１端面に対向する方向変換部材には、第１穴に連通し、方向変換部材を長手方向に貫通する第２穴が形成されている。支持部材は、第１穴および第２穴に挿入されている。 [Overview of embodiment]
A linear motion guide unit according to the present disclosure includes a rail, a casing movable along the longitudinal direction of the rail, and a plurality of rollers disposed between the rail and the casing so as to be able to roll while contacting the rail and the casing. A moving body and a pair of direction changing members arranged at both longitudinal ends of the casing are provided. The rail includes a pair of rail-side rolling surfaces that are arranged on both sides in the width direction perpendicular to the longitudinal direction and extend in the longitudinal direction. The casing includes a casing body and a pair of sleeves connected to both widthwise sides of the casing body. In the pair of sleeves, casing-side rolling bearings which face the pair of rail-side rolling surfaces and extend in the longitudinal direction form a pair of rolling element rolling paths with the pair of rail-side rolling surfaces. faces are formed. The casing is formed with a pair of return paths, which are through holes extending longitudinally along each of the pair of rail-side rolling surfaces and penetrating the casing longitudinally. A direction changing path connecting the rolling element rolling path and the return path is formed in the pair of direction changing members. The rolling elements circulate on an annular orbit formed by the rolling element rolling path, the return path, and the direction changing path. The linear motion guide unit further includes a pair of holding members that hold the rolling elements between them and the sleeve portions and extend in the longitudinal direction, and a support member that supports the holding members with respect to the direction changing member. The holding member is formed with a first hole that opens to a first end face, which is one end face in the longitudinal direction. Of the pair of direction changing members, the direction changing member facing the first end face is formed with a second hole that communicates with the first hole and penetrates the direction changing member in the longitudinal direction. The support member is inserted into the first hole and the second hole.
　上記直動案内ユニットでは、第１端面に開口する第１穴が保持部材に形成されており、且つ当該第１穴に連通するとともに長手方向に貫通する第２穴が方向変換部材に形成されている。そして、支持部材が第１穴および第２穴に挿入されることにより、保持部材が方向変換部材に対して支持されている。このため、上記直動案内ユニットでは、保持部材にバンド溝を形成する必要がないため、従来に比べて保持部材をより小型化することができる。したがって、上記直動案内ユニットによれば、サイズがより大きい転動体を保持部材とケーシングの袖部との間に配置することができるため、直動案内ユニットの耐荷重性能を改善することができる。 In the linear motion guide unit, the holding member is formed with the first hole that opens to the first end surface, and the direction changing member is formed with the second hole that communicates with the first hole and penetrates in the longitudinal direction. there is The holding member is supported with respect to the direction changing member by inserting the supporting member into the first hole and the second hole. Therefore, in the above-described linear motion guide unit, since it is not necessary to form a band groove in the holding member, the holding member can be made more compact than the conventional one. Therefore, according to the linear motion guide unit, since the rolling elements having a larger size can be arranged between the holding member and the sleeve portion of the casing, the load bearing performance of the linear motion guide unit can be improved. .
　上記直動案内ユニットにおいて、第１穴は、保持部材を長手方向に貫通するように形成されていてもよい。この構成によれば、保持部材をより軽量化することができる。 In the above linear motion guide unit, the first hole may be formed so as to pass through the holding member in the longitudinal direction. With this configuration, the weight of the holding member can be reduced.
　上記直動案内ユニットにおいて、保持部材には、保持部材の内部に底を有する第１穴と、第１端面と反対の第２端面に開口するとともに第１穴に対して離間し、保持部材の内部に底を有する第３穴と、が形成されていてもよい。この構成によれば、保持部材の長手方向の全体にわたって第１穴が形成される場合に比べて、保持部材の強度を高めることができる。 In the above linear motion guide unit, the holding member has a first hole having a bottom inside the holding member and a second end face opposite to the first end face, which is open and spaced apart from the first hole. A third hole having a bottom therein may be formed. According to this configuration, the strength of the holding member can be increased compared to the case where the first hole is formed over the entire length of the holding member.
　上記直動案内ユニットにおいて、長手方向に垂直な断面において、第１穴および第２穴は、長手方向および幅方向の両方に対して直交する上下方向の長さが幅方向の長さよりも長い形状を有していてもよい。この構成によれば、第１穴および第２穴の両方が幅方向に長い形状である場合に比べて、保持部材とケーシングの袖部との間に転動体の配置スペースをより広く確保することができる。その結果、サイズがより大きい転動体を採用することが可能になり、直動案内ユニットの耐荷重性能をより高めることができる。しかも、保持部材が方向変換部材に対して回転するのを抑制することもできる。 In the linear motion guide unit, in a cross section perpendicular to the longitudinal direction, the first hole and the second hole have a shape in which the length in the vertical direction orthogonal to both the longitudinal direction and the width direction is longer than the length in the width direction. may have According to this configuration, compared to the case where both the first hole and the second hole are elongated in the width direction, it is possible to ensure a wider space for arranging the rolling elements between the holding member and the sleeve portion of the casing. can be done. As a result, it becomes possible to employ rolling elements having a larger size, and the load bearing performance of the linear motion guide unit can be further enhanced. Moreover, it is possible to prevent the holding member from rotating with respect to the direction changing member.
　［実施形態の具体例］
　次に、本開示の直動案内ユニットの具体的な実施の形態を、図面を参照しつつ説明する。以下の図面において、同一または相当する部分には同一の参照符号を付し、その説明は繰り返さない。 [Specific example of embodiment]
Next, specific embodiments of the linear motion guide unit of the present disclosure will be described with reference to the drawings. In the drawings below, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will not be repeated.
　（実施の形態１）
　まず、実施の形態１に係る直動案内ユニット１の構成を、図１～図５に基づいて説明する。図１は、直動案内ユニット１の構成を全体的に示す斜視図である。図２は、スライダ２０が長手方向Ｄ１に分解された状態を示す斜視図である。図３は、ケーシング２１を長手方向Ｄ１に見た正面図である。図４は、第１エンドキャップ２２の内部構造を部分的に示す図である。図５は、スライダ２０の内部構造を示す斜視断面図である。 (Embodiment 1)
First, the configuration of a linear guide unit 1 according to Embodiment 1 will be described with reference to FIGS. 1 to 5. FIG. FIG. 1 is a perspective view showing the overall configuration of a linear guide unit 1. FIG. FIG. 2 is a perspective view showing a state in which the slider 20 is disassembled in the longitudinal direction D1. FIG. 3 is a front view of the casing 21 viewed in the longitudinal direction D1. FIG. 4 is a view partially showing the internal structure of the first end cap 22. As shown in FIG. FIG. 5 is a perspective sectional view showing the internal structure of the slider 20. As shown in FIG.
　図１に示すように、直動案内ユニット１は、レール１０と、スライダ２０とを主に備えている。レール１０は、長手方向Ｄ１に直線的に延びている。スライダ２０は、レール１０を幅方向Ｄ２の両側から挟むように、レール１０に取り付けられている。スライダ２０は、レール１０の長手方向Ｄ１に沿って移動可能（スライド可能）となっている。スライダ２０は、ケーシング２１と、一対の方向変換部材（第１エンドキャップ２２および第２エンドキャップ２３）とを含む。図１に示すように、第１エンドキャップ２２および第２エンドキャップ２３は、ケーシング２１の長手方向Ｄ１の両端に配置されている。 As shown in FIG. 1, the linear motion guide unit 1 mainly includes a rail 10 and a slider 20. The rail 10 extends linearly in the longitudinal direction D1. The sliders 20 are attached to the rails 10 so as to sandwich the rails 10 from both sides in the width direction D2. The slider 20 is movable (slidable) along the longitudinal direction D<b>1 of the rail 10 . The slider 20 includes a casing 21 and a pair of direction changing members (first end cap 22 and second end cap 23). As shown in FIG. 1, the first end cap 22 and the second end cap 23 are arranged at both ends of the casing 21 in the longitudinal direction D1.
　図３に示すように、レール１０は、第１レール面１５と、第２レール面１６と、一対のレール側転走面（第１レール側転走面１１および第２レール側転走面１２）とを含む。第１レール面１５は、ケーシング２１側を向く面である。第２レール面１６は、上下方向Ｄ３（長手方向Ｄ１および幅方向Ｄ２の両方向に対して垂直な方向）において、第１レール面１５と反対を向く面である。第１レール側転走面１１および第２レール側転走面１２は、レール１０の幅方向Ｄ２（長手方向Ｄ１および上下方向Ｄ３の両方向に対して垂直な方向）の両側に配置されている。第１レール面１５、第２レール面１６、第１レール側転走面１１および第２レール側転走面１２は、それぞれ長手方向Ｄ１に延びている。図３に示すように、第１レール側転走面１１および第２レール側転走面１２は、幅方向Ｄ２および上下方向Ｄ３の両方向に対して傾斜している。本実施の形態では、第１レール側転走面１１および第２レール側転走面１２は、上下方向Ｄ３に２つずつ並んで形成されているが、これに限定されない。 As shown in FIG. 3, the rail 10 includes a first rail surface 15, a second rail surface 16, and a pair of rail side rolling surfaces (first rail side rolling surface 11 and second rail side rolling surface 12). ) and The first rail surface 15 is a surface facing the casing 21 side. The second rail surface 16 is a surface facing away from the first rail surface 15 in the vertical direction D3 (the direction perpendicular to both the longitudinal direction D1 and the width direction D2). The first rail-side rolling surface 11 and the second rail-side rolling surface 12 are arranged on both sides of the rail 10 in the width direction D2 (the direction perpendicular to both the longitudinal direction D1 and the vertical direction D3). The first rail surface 15, the second rail surface 16, the first rail side rolling surface 11, and the second rail side rolling surface 12 each extend in the longitudinal direction D1. As shown in FIG. 3, the first rail-side raceway surface 11 and the second rail-side raceway surface 12 are inclined with respect to both the width direction D2 and the vertical direction D3. In the present embodiment, two first rail-side rolling surfaces 11 and two second rail-side rolling surfaces 12 are formed side by side in the vertical direction D3, but the present invention is not limited to this.
　ケーシング２１は、ケーシング本体２４と、一対の袖部（第１袖部２５および第２袖部２６）とを含む。図３に示すように、ケーシング本体２４は、長手方向Ｄ１に見て、幅方向Ｄ２に直線的に延びている。ケーシング本体２４は、幅方向Ｄ２においてレール１０よりも外側に位置する第１端部２４Ａと、幅方向Ｄ２においてレール１０よりも外側に位置するとともに第１端部２４Ａと反対の第２端部２４Ｂとを含む。上記一対の袖部は、ケーシング本体２４の幅方向Ｄ２の両側に接続されている。図３に示すように、第１袖部２５は、第１端部２４Ａから第２レール面１６に近づくように上下方向Ｄ３に延びている。第２袖部２６は、第２端部２４Ｂから第２レール面１６に近づくように上下方向Ｄ３に延びている。 The casing 21 includes a casing body 24 and a pair of sleeves (first sleeve 25 and second sleeve 26). As shown in FIG. 3, the casing main body 24 extends linearly in the width direction D2 when viewed in the longitudinal direction D1. The casing body 24 has a first end portion 24A located outside the rails 10 in the width direction D2 and a second end portion 24B located outside the rails 10 in the width direction D2 and opposite to the first end portion 24A. including. The pair of sleeves are connected to both sides of the casing body 24 in the width direction D2. As shown in FIG. 3, the first sleeve portion 25 extends in the vertical direction D3 from the first end portion 24A so as to approach the second rail surface 16. As shown in FIG. The second sleeve portion 26 extends in the vertical direction D3 so as to approach the second rail surface 16 from the second end portion 24B.
　ケーシング本体２４は、第１レール面１５に対向する第１ケーシング面３６と、上下方向Ｄ３において第１ケーシング面３６と反対の第２ケーシング面３５とを含む。上記一対の袖部には、上記一対のレール側転走面に対向する一対のケーシング側転走面（第１ケーシング側転走面３１および第２ケーシング側転走面３２）が形成されている。第１ケーシング側転走面３１は、第１レール側転走面１１に平行であり、長手方向Ｄ１に延びている。第２ケーシング側転走面３２は、第２レール側転走面１２に平行であり、長手方向Ｄ１に延びている。図３に示すように、本実施の形態では、第１ケーシング側転走面３１および第２ケーシング側転走面３２は、上下方向Ｄ３に２つずつ並んで形成されているが、これに限定されない。 The casing main body 24 includes a first casing surface 36 facing the first rail surface 15 and a second casing surface 35 opposite to the first casing surface 36 in the vertical direction D3. A pair of casing-side rolling surfaces (first casing-side rolling surface 31 and second casing-side rolling surface 32) facing the pair of rail-side rolling surfaces is formed on the pair of sleeve portions. . The first casing side rolling surface 31 is parallel to the first rail side rolling surface 11 and extends in the longitudinal direction D1. The second casing side rolling surface 32 is parallel to the second rail side rolling surface 12 and extends in the longitudinal direction D1. As shown in FIG. 3, in the present embodiment, two first casing side rolling surfaces 31 and two second casing side rolling surfaces 32 are formed side by side in the vertical direction D3. not.
　ケーシング２１は、長手方向Ｄ１における端面であるケーシング端面３７を含む。ケーシング端面３７に、第１エンドキャップ２２および第２エンドキャップ２３（図１）が接触するように配置されている。図３に示すように、第１袖部２５は、幅方向Ｄ２においてレール１０と反対を向く第１ケーシング側面３８を含む。第２袖部２６は、幅方向Ｄ２においてレール１０と反対を向く第２ケーシング側面３９を含む。 The casing 21 includes a casing end surface 37 that is an end surface in the longitudinal direction D1. The first end cap 22 and the second end cap 23 (FIG. 1) are arranged to contact the casing end face 37 . As shown in FIG. 3, the first sleeve portion 25 includes a first casing side surface 38 facing away from the rail 10 in the width direction D2. The second sleeve portion 26 includes a second casing side surface 39 facing away from the rail 10 in the width direction D2.
　図３に示すように、直動案内ユニット１は、レール１０およびケーシング２１の間にレール１０およびケーシング２１に接触しつつ転走可能に配置される複数の転動体（第１転動体４１および第２転動体４２）を備えている。第１ケーシング側転走面３１は、第１レール側転走面１１との間に第１転動体転走路（一対の転動体転走路のうち一方）を形成している。当該第１転動体転走路に、複数の第１転動体４１が長手方向Ｄ１に並べて配置されている。本実施の形態では、第１転動体４１は、円筒ころであり、外周面が第１レール側転走面１１および第１ケーシング側転走面３１に接触している。 As shown in FIG. 3, the linear motion guide unit 1 includes a plurality of rolling elements (first rolling element 41 and second rolling element 41) disposed between the rail 10 and the casing 21 so as to be able to roll while contacting the rail 10 and the casing 21. 2 rolling elements 42). The first casing-side rolling surface 31 forms a first rolling-element rolling path (one of the pair of rolling-element rolling paths) with the first rail-side rolling surface 11 . A plurality of first rolling elements 41 are arranged side by side in the longitudinal direction D1 on the first rolling element rolling path. In this embodiment, the first rolling element 41 is a cylindrical roller, and the outer peripheral surface is in contact with the first rail-side rolling surface 11 and the first casing-side rolling surface 31 .
　第２ケーシング側転走面３２は、第２レール側転走面１２との間に第２転動体転走路（一対の転動体転走路のうち他方）を形成している。当該第２転動体転走路に、複数の第２転動体４２が長手方向Ｄ１に並べて配置されている。本実施の形態では、第２転動体４２は、円筒ころであり、外周面が第２レール側転走面１２および第２ケーシング側転走面３２に接触している。 The second casing side rolling surface 32 forms a second rolling element rolling path (the other of the pair of rolling element rolling paths) with the second rail side rolling surface 12 . A plurality of second rolling elements 42 are arranged side by side in the longitudinal direction D1 on the second rolling element rolling path. In the present embodiment, the second rolling element 42 is a cylindrical roller, and the outer peripheral surface is in contact with the second rail-side rolling surface 12 and the second casing-side rolling surface 32 .
　ケーシング２１には、一対のリターン路（第１リターン路５１および第２リターン路５２）が形成されている。上記一対のリターン路は、上記一対のレール側転走面のそれぞれに沿って長手方向Ｄ１に延び、ケーシング２１を長手方向Ｄ１に貫通する貫通孔である。図３に示すように、第１リターン路５１は、長手方向Ｄ１に見て円形の貫通孔であり、一方のケーシング端面３７から他方のケーシング端面３７まで至るように第１袖部２５を長手方向Ｄ１に貫通している。本実施の形態では、第１リターン路５１は、第１袖部２５において上下方向Ｄ３に２つ並んで形成されているが、これに限定されない。 A pair of return paths (a first return path 51 and a second return path 52) are formed in the casing 21. The pair of return paths are through holes extending in the longitudinal direction D1 along the pair of rail-side rolling surfaces, respectively, and penetrating the casing 21 in the longitudinal direction D1. As shown in FIG. 3, the first return path 51 is a circular through-hole when viewed in the longitudinal direction D1, and the first sleeve portion 25 extends longitudinally from one casing end surface 37 to the other casing end surface 37. As shown in FIG. It penetrates D1. Although two first return paths 51 are formed side by side in the vertical direction D3 in the first sleeve portion 25 in the present embodiment, the present invention is not limited to this.
　第２リターン路５２は、第１リターン路５１と同様に、長手方向Ｄ１に見て円形の貫通孔である。第２リターン路５２は、一方のケーシング端面３７から他方のケーシング端面３７まで至るように第２袖部２６を長手方向Ｄ１に貫通している。本実施の形態では、第２リターン路５２は、第２袖部２６において上下方向Ｄ３に２つ並んで形成されているが、これに限定されない。第１袖部２５の長手方向Ｄ１の端面には、第１リターン路５１の長手方向Ｄ１の端部である円形の開口が形成されている。同様に、第２袖部２６の長手方向Ｄ１の端面には、第２リターン路５２の長手方向Ｄ１の端部である円形の開口が形成されている。 Like the first return path 51, the second return path 52 is a circular through hole when viewed in the longitudinal direction D1. The second return path 52 penetrates the second sleeve portion 26 in the longitudinal direction D1 from one casing end face 37 to the other casing end face 37 . Although two second return paths 52 are formed side by side in the vertical direction D3 in the second sleeve portion 26 in the present embodiment, the present invention is not limited to this. A circular opening, which is the end portion in the longitudinal direction D1 of the first return path 51, is formed in the end surface of the first sleeve portion 25 in the longitudinal direction D1. Similarly, the end face of the second sleeve portion 26 in the longitudinal direction D1 is formed with a circular opening that is the end portion of the second return path 52 in the longitudinal direction D1.
　図４は、第１エンドキャップ２２（図１および図２）のうちケーシング２１側を向く面を部分的に示している。図４に示すように、第１エンドキャップ２２には、上記第１転動体転走路と第１リターン路５１（図３）とを繋ぐ第１方向変換路６１が形成されている。より具体的には、図３を参照して、上下２つの上記第１転動体転走路のうち第１レール面１５に近い方の上記第１転動体転走路と、上下２つの第１リターン路５１のうち第１レール面１５から遠い方の第１リターン路５１とが、一方の第１方向変換路６１（図４）により繋がっている。一方、上下２つの上記第１転動体転走路のうち第１レール面１５から遠い方の上記第１転動体転走路と、上下２つの第１リターン路５１のうち第１レール面１５に近い方の第１リターン路５１とが、他方の第１方向変換路６１（図４）により繋がっている。 FIG. 4 partially shows the surface of the first end cap 22 (FIGS. 1 and 2) facing the casing 21 side. As shown in FIG. 4, the first end cap 22 is formed with a first direction changing path 61 that connects the first rolling element rolling path and the first return path 51 (FIG. 3). More specifically, referring to FIG. 3, the first rolling element rolling path, which is closer to the first rail surface 15 of the two upper and lower first rolling element rolling paths, and the two upper and lower first return paths. The first return path 51 farther from the first rail surface 15 among the 51 is connected by one first direction changing path 61 (FIG. 4). On the other hand, the first rolling element rolling path farther from the first rail surface 15 of the two upper and lower first rolling element rolling paths, and the one closer to the first rail surface 15 of the two upper and lower first return paths 51 and the first return path 51 are connected by the other first direction change path 61 (FIG. 4).
　第２エンドキャップ２３（図１および図２）においても、第１エンドキャップ２２と同様に、第１方向変換路が形成されている。スライダ２０（図１）がレール１０の長手方向Ｄ１に沿って直線的に移動すると、第１転動体４１（図３）は、上記第１転動体転走路、第１リターン路５１および第１方向変換路６１によって形成される環状の軌道を循環する。 Similarly to the first end cap 22, the second end cap 23 (FIGS. 1 and 2) also has a first direction changing path. When the slider 20 (FIG. 1) moves linearly along the longitudinal direction D1 of the rail 10, the first rolling elements 41 (FIG. 3) move along the first rolling element rolling path, the first return path 51 and the first direction. It circulates on an annular orbit formed by the conversion path 61 .
　図示は省略するが、第１エンドキャップ２２および第２エンドキャップ２３には、上記第２転動体転走路と第２リターン路５２（図３）とを繋ぐ第２方向変換路が、第１方向変換路６１（図４）と同様に形成されている。このため、スライダ２０がレール１０の長手方向Ｄ１に沿って直線的に移動するのに伴い、第２転動体４２（図３）は、上記第２転動体転走路、第２リターン路５２および上記第２方向変換路によって形成される環状の軌道を循環する。 Although not shown, the first end cap 22 and the second end cap 23 have a second direction changing path connecting the second rolling element rolling path and the second return path 52 (FIG. 3) in the first direction. It is formed similarly to the conversion path 61 (FIG. 4). Therefore, as the slider 20 moves linearly along the longitudinal direction D1 of the rail 10, the second rolling elements 42 (FIG. 3) move along the second rolling element rolling path, the second return path 52, and the second rolling element rolling path. It circulates on an annular orbit formed by the second turning path.
　直動案内ユニット１は、一対の保持部材（第１保持部材７０および第２保持部材７１）をさらに備えている（図２、図３および図５）。図２に示すように、第１保持部材７０および第２保持部材７１は、長手方向Ｄ１に延びており、長手方向Ｄ１に見て略三角形状を有している。図３に示すように、第１保持部材７０は、第１転動体４１を第１袖部２５との間で挟持する。より具体的には、第１転動体４１は、転動軸が延びる方向における一方の端面が第１袖部２５の幅方向Ｄ２の内面に接触するとともに、当該方向における他方の端面が第１保持部材７０（図３中の略三角形状の斜辺部）に接触する。 The linear motion guide unit 1 further includes a pair of holding members (first holding member 70 and second holding member 71) (Figs. 2, 3 and 5). As shown in FIG. 2, the first holding member 70 and the second holding member 71 extend in the longitudinal direction D1 and have a substantially triangular shape when viewed in the longitudinal direction D1. As shown in FIG. 3 , the first holding member 70 sandwiches the first rolling element 41 with the first sleeve portion 25 . More specifically, one end surface of the first rolling element 41 in the direction in which the rolling shaft extends contacts the inner surface of the first sleeve portion 25 in the width direction D2, and the other end surface in the direction is the first holding member. It contacts the member 70 (substantially triangular hypotenuse in FIG. 3).
　同様に、第２保持部材７１は、第２転動体４２を第２袖部２６との間で挟持する。具体的には、第２転動体４２は、転動軸が延びる方向における一方の端面が第２袖部２６の幅方向Ｄ２の内面に接触するとともに、当該方向における他方の端面が第２保持部材７１（図３中の略三角形状の斜辺部）に接触する。図３に示すように、第１保持部材７０は、レール１０の幅方向Ｄ２の側面のうち、一方の第１レール側転走面１１と他方の第１レール側転走面１１との間の空間（凹部）に配置されている。同様に、第２保持部材７１は、レール１０の幅方向Ｄ２の側面のうち、一方の第２レール側転走面１２と他方の第２レール側転走面１２との間の空間（凹部）に配置されている。 Similarly, the second holding member 71 sandwiches the second rolling element 42 with the second sleeve portion 26 . Specifically, one end surface of the second rolling element 42 in the direction in which the rolling shaft extends contacts the inner surface of the second sleeve portion 26 in the width direction D2, and the other end surface in the direction is the second holding member. 71 (substantially triangular hypotenuse in FIG. 3). As shown in FIG. 3 , the first holding member 70 is provided between one first rail-side rolling surface 11 and the other first rail-side rolling surface 11 of the side surfaces of the rail 10 in the width direction D2. It is arranged in the space (recess). Similarly, the second holding member 71 is a space (recess) between one of the side surfaces of the rail 10 in the width direction D2 and between the second rail side rolling surface 12 and the other second rail side rolling surface 12 . are placed in
　図５に示すように、第２保持部材７１には、長手方向Ｄ１の一方の端面である第１端面に開口する第１穴９１が形成されるとともに、当該第１端面と反対の第２端面に開口するとともに第１穴９１に対して長手方向Ｄ１に離間する第３穴９３が形成されている。本実施の形態では、第２保持部材７１のうち第１穴９１と第３穴９３との間の部分は、穴が形成されていない中実の部分となっている。第１穴９１および第３穴９３は、第２保持部材７１の内部に底を有する有底穴であり、長手方向Ｄ１の深さ（長さ）は略同じである。なお、第１保持部材７０は、第２保持部材７１と同様の構成を有しており、第１穴９１および第３穴９３が長手方向Ｄ１の両端にそれぞれ形成されている。 As shown in FIG. 5, the second holding member 71 is formed with a first hole 91 opening to a first end face, which is one end face in the longitudinal direction D1, and a second end face opposite to the first end face. A third hole 93 is formed which opens to the outside and is separated from the first hole 91 in the longitudinal direction D1. In the present embodiment, a portion of the second holding member 71 between the first hole 91 and the third hole 93 is a solid portion without holes. The first hole 91 and the third hole 93 are bottomed holes having bottoms inside the second holding member 71, and have approximately the same depth (length) in the longitudinal direction D1. The first holding member 70 has the same configuration as the second holding member 71, and a first hole 91 and a third hole 93 are formed at both ends in the longitudinal direction D1.
　図５に示すように、第１エンドキャップ２２（上記一対の方向変換部材のうち上記第１端面に対向する方向変換部材）には、第１エンドキャップ２２を長手方向Ｄ１に貫通する第２穴９２が形成されている。第２穴９２は、長手方向Ｄ１に見て第１穴９１と略同じ大きさおよび形状を有している。第２穴９２は、第１エンドキャップ２２がケーシング２１に取り付けられる状態（ケーシング端面３７に接触する状態）において、第１穴９１に連通している。 As shown in FIG. 5, the first end cap 22 (the direction-changing member of the pair of direction-changing members facing the first end surface) has a second hole extending through the first end cap 22 in the longitudinal direction D1. 92 are formed. The second hole 92 has substantially the same size and shape as the first hole 91 when viewed in the longitudinal direction D1. The second hole 92 communicates with the first hole 91 when the first end cap 22 is attached to the casing 21 (in contact with the casing end face 37).
　同様に、第２エンドキャップ２３（上記一対の方向変換部材のうち上記第２端面に対向する方向変換部材）には、第２エンドキャップ２３を長手方向Ｄ１に貫通する第４穴９４が形成されている。第４穴９４は、長手方向Ｄ１に見て第３穴９３と略同じ大きさおよび形状を有している。第４穴９４は、第２エンドキャップ２３がケーシング２１に取り付けられる状態（ケーシング端面３７に接触する状態）において、第３穴９３に連通している。 Similarly, the second end cap 23 (the direction changing member of the pair of direction changing members facing the second end surface) is formed with a fourth hole 94 penetrating the second end cap 23 in the longitudinal direction D1. ing. The fourth hole 94 has substantially the same size and shape as the third hole 93 when viewed in the longitudinal direction D1. The fourth hole 94 communicates with the third hole 93 when the second end cap 23 is attached to the casing 21 (in contact with the casing end surface 37).
　本実施の形態における第１穴９１は、長手方向Ｄ１に垂直な断面において、上下方向Ｄ３の長さが幅方向Ｄ２の長さよりも長い形状を有している（図３および図５）。より具体的には、本実施の形態における第１穴９１は、長手方向Ｄ１に見て、上下方向Ｄ３に長い長方形状を有している。 The first hole 91 in the present embodiment has a shape in which the length in the vertical direction D3 is longer than the length in the width direction D2 in a cross section perpendicular to the longitudinal direction D1 (FIGS. 3 and 5). More specifically, the first hole 91 in the present embodiment has a rectangular shape elongated in the vertical direction D3 when viewed in the longitudinal direction D1.
　同様に、本実施の形態における第２穴９２は、長手方向Ｄ１に垂直な断面において、上下方向Ｄ３の長さが幅方向Ｄ２の長さよりも長い形状を有している（図４）。より具体的には、本実施の形態における第２穴９２は、長手方向Ｄ１に見て、上下方向Ｄ３に長い長方形状を有している。なお、第３穴９３および第４穴９４も、第１穴９１および第２穴９２と同様に、上下方向Ｄ３の長さが幅方向Ｄ２の長さよりも長い形状、例えば長手方向Ｄ１に見て上下方向Ｄ３に長い長方形状を有している。 Similarly, the second hole 92 in the present embodiment has a shape in which the length in the vertical direction D3 is longer than the length in the width direction D2 in a cross section perpendicular to the longitudinal direction D1 (Fig. 4). More specifically, the second hole 92 in the present embodiment has a rectangular shape elongated in the vertical direction D3 when viewed in the longitudinal direction D1. Note that, similarly to the first hole 91 and the second hole 92, the third hole 93 and the fourth hole 94 also have a shape in which the length in the vertical direction D3 is longer than the length in the width direction D2, for example, when viewed in the longitudinal direction D1. It has a rectangular shape elongated in the vertical direction D3.
　直動案内ユニット１は、第１保持部材７０および第２保持部材７１を第１エンドキャップ２２および第２エンドキャップ２３に対して支持する複数の支持部材（第１支持部材８１、第２支持部材８２、第３支持部材８３および第４支持部材８４、図２）をさらに備えている。図２に示すように、本実施の形態における第１～第４支持部材８１～８４は、略Ｌ字形状を有しており、各保持部材に形成される有底穴および各エンドキャップに形成される貫通穴に挿入されている。図２に示すように、第１エンドキャップ２２の外面（ケーシング２１と反対の面）には、第１支持部材８１の短辺部および第３支持部材８３の短辺部が嵌め込まれる凹部２２Ａが形成されている。同様に、第２エンドキャップ２３の外面（ケーシング２１と反対の面）にも、第２支持部材８２の短辺部および第４支持部材８４の短辺部が嵌め込まれる凹部（図示しない）が形成されている。なお、この凹部は、必須の構成ではなく、省略されてもよい。また第１～第４支持部材８１～８４は、Ｌ字形状の部材に限定されず、例えば直線状に延びる形状の部材であってもよい。 The linear motion guide unit 1 includes a plurality of support members (a first support member 81, a second support member 82, a third support member 83 and a fourth support member 84 (FIG. 2). As shown in FIG. 2, the first to fourth support members 81 to 84 in this embodiment have a substantially L-shape, and are formed in bottomed holes formed in each holding member and in each end cap. is inserted into the through hole where As shown in FIG. 2, the outer surface of the first end cap 22 (the surface opposite to the casing 21) has a recess 22A into which the short side portions of the first support member 81 and the short side portions of the third support member 83 are fitted. formed. Similarly, the outer surface of the second end cap 23 (the surface opposite to the casing 21) is also formed with recesses (not shown) into which the short sides of the second support member 82 and the short sides of the fourth support member 84 are fitted. It is Note that this concave portion is not an essential configuration and may be omitted. Further, the first to fourth support members 81 to 84 are not limited to L-shaped members, and may be linearly extending members, for example.
　第１支持部材８１は、長辺部が第１保持部材７０に形成される第１穴９１（有底穴）および第１エンドキャップ２２に形成される第２穴９２（貫通穴）に挿入されている。第２支持部材８２は、長辺部が第１保持部材７０に形成される第３穴９３（有底穴）および第２エンドキャップ２３に形成される第４穴９４（貫通穴）に挿入されている。第３支持部材８３は、長辺部が第２保持部材７１に形成される第１穴９１（有底穴）および第１エンドキャップ２２に形成される第２穴９２（貫通穴）に挿入されている。第４支持部材８４は、長辺部が第２保持部材７１に形成される第３穴９３（有底穴）および第２エンドキャップ２３に形成される第４穴９４（貫通穴）に挿入されている。 The first support member 81 has its long sides inserted into a first hole 91 (bottomed hole) formed in the first holding member 70 and a second hole 92 (through hole) formed in the first end cap 22 . ing. The second support member 82 has its long sides inserted into a third hole 93 (bottomed hole) formed in the first holding member 70 and a fourth hole 94 (through hole) formed in the second end cap 23 . ing. The third support member 83 has its long sides inserted into a first hole 91 (bottomed hole) formed in the second holding member 71 and a second hole 92 (through hole) formed in the first end cap 22 . ing. The fourth support member 84 has long sides inserted into a third hole 93 (bottomed hole) formed in the second holding member 71 and a fourth hole 94 (through hole) formed in the second end cap 23 . ing.
　以上の通り、本実施の形態に係る直動案内ユニット１では、第１穴９１が第１保持部材７０および第２保持部材７１に形成されており、且つ第１穴９１に連通するとともに長手方向Ｄ１に貫通する第２穴９２が第１エンドキャップ２２に形成されている。そして、第１支持部材８１および第３支持部材８３が第１穴９１および第２穴９２に挿入されることにより、第１保持部材７０および第２保持部材７１が第１エンドキャップ２２に対して支持されている。同様に、第２支持部材８２および第４支持部材８４が第３穴９３および第４穴９４に挿入されることにより、第１保持部材７０および第２保持部材７１が第２エンドキャップ２３に対して支持されている。このため、本実施の形態に係る直動案内ユニット１では、第１保持部材７０および第２保持部材７１にバンド溝を形成する必要がないため、第１保持部材７０および第２保持部材７１をより小型化することができる。したがって、サイズがより大きい転動体を第１保持部材７０および第２保持部材７１とケーシング２１の袖部との間に配置することができるため、直動案内ユニット１の耐荷重性能を改善することができる。 As described above, in the linear motion guide unit 1 according to the present embodiment, the first hole 91 is formed in the first holding member 70 and the second holding member 71, communicates with the first hole 91, and extends in the longitudinal direction. A second hole 92 is formed in the first end cap 22 through D1. By inserting the first support member 81 and the third support member 83 into the first hole 91 and the second hole 92 , the first holding member 70 and the second holding member 71 are attached to the first end cap 22 . Supported. Similarly, by inserting the second support member 82 and the fourth support member 84 into the third hole 93 and the fourth hole 94, the first holding member 70 and the second holding member 71 are attached to the second end cap 23. supported by Therefore, in the linear motion guide unit 1 according to the present embodiment, it is not necessary to form band grooves in the first holding member 70 and the second holding member 71, so the first holding member 70 and the second holding member 71 are It can be made smaller. Therefore, since rolling elements having a larger size can be arranged between the first holding member 70 and the second holding member 71 and the sleeve portion of the casing 21, the load bearing performance of the linear motion guide unit 1 can be improved. can be done.
　（実施の形態２）
　次に、実施の形態２に係る直動案内ユニットの構成を、図６に基づいて説明する。実施の形態２は、基本的に上記実施の形態１と同様であるが、第１保持部材７０および第２保持部材７１の構成において異なっている。以下、上記実施の形態１と異なる点についてのみ説明する。 (Embodiment 2)
Next, the configuration of a linear motion guide unit according to Embodiment 2 will be described with reference to FIG. Embodiment 2 is basically similar to Embodiment 1 above, but differs in the configuration of first holding member 70 and second holding member 71 . Only points different from the first embodiment will be described below.
　図６は、実施の形態２におけるスライダ２０の内部構造を示す斜視断面図である。図６に示すように、第１穴９１は、第２保持部材７１を長手方向Ｄ１の全体にわたって貫通するように形成されている。図示は省略するが、第１保持部材７０においても、第１穴９１は、第１保持部材７０を長手方向Ｄ１の全体にわたって貫通するように形成されている。このため、実施の形態２では、第１保持部材７０および第２保持部材７１が長手方向Ｄ１の全体にわたって中空構造となっているため、部材の軽量化を図ることができる。 FIG. 6 is a perspective cross-sectional view showing the internal structure of the slider 20 according to the second embodiment. As shown in FIG. 6, the first hole 91 is formed so as to penetrate the second holding member 71 over the entire longitudinal direction D1. Although not shown, in the first holding member 70 as well, the first hole 91 is formed so as to pass through the first holding member 70 entirely in the longitudinal direction D1. Therefore, in Embodiment 2, since the first holding member 70 and the second holding member 71 have a hollow structure over the entire lengthwise direction D1, weight reduction of the members can be achieved.
　（その他実施の形態）
　ここで、その他実施の形態について説明する。 (Other embodiments)
Other embodiments will now be described.
　上記実施の形態１，２では、第１穴９１および第２穴９２が上下方向Ｄ３に長い長方形状を有する場合を一例として説明したが、これに限定されない。例えば、第１穴９１および第２穴９２は、長手方向Ｄ１に見て、円形状や正方形状を有していてもよい。 In Embodiments 1 and 2 above, the case where the first hole 91 and the second hole 92 have a rectangular shape elongated in the vertical direction D3 has been described as an example, but the present invention is not limited to this. For example, the first hole 91 and the second hole 92 may have a circular shape or a square shape when viewed in the longitudinal direction D1.
　上記実施の形態１，２では、第１転動体４１および第２転動体４２が円筒ころである場合を一例として説明したが、これに限定されない。例えば、第１転動体４１および第２転動体４２は、ボールであってもよい。 In Embodiments 1 and 2 above, the case where the first rolling element 41 and the second rolling element 42 are cylindrical rollers has been described as an example, but the present invention is not limited to this. For example, the first rolling element 41 and the second rolling element 42 may be balls.
　図７に示すように、第１エンドキャップ２２には、第１転動体４１を投入するための第１投入穴９５が形成されるとともに、第１投入穴９５を塞ぐ第１蓋部材９７が配置されていてもよい。同様に、第１エンドキャップ２２には、第２転動体４２を投入するための第２投入穴９６が形成されるとともに、第２投入穴９６を塞ぐ第２蓋部材９８が配置されていてもよい。 As shown in FIG. 7, the first end cap 22 is formed with a first insertion hole 95 for inserting the first rolling element 41, and a first lid member 97 is arranged to close the first insertion hole 95. may have been Similarly, the first end cap 22 is formed with a second insertion hole 96 for inserting the second rolling element 42, and even if a second lid member 98 is arranged to close the second insertion hole 96. good.
　今回開示された実施の形態は、全ての点で例示であって、制限的なものではないと解されるべきである。本発明の範囲は、上記した説明ではなくて請求の範囲により示され、請求の範囲と均等の意味および範囲内での全ての変更が含まれることが意図される。 It should be understood that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the above description, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.
　１　直動案内ユニット、１０　レール、１１　第１レール側転走面、１２　第２レール側転走面、１５　第１レール面、１６　第２レール面、２０　スライダ、２１　ケーシング、２２　第１エンドキャップ、２２Ａ　凹部、２３　第２エンドキャップ、２４　ケーシング本体、２４Ａ　第１端部、２４Ｂ　第２端部、２５　第１袖部、２６　第２袖部、３１　第１ケーシング側転走面、３２　第２ケーシング側転走面、３５　第２ケーシング面、３６　第１ケーシング面、３７　ケーシング端面、３８　第１ケーシング側面、３９　第２ケーシング側面、４１　第１転動体、４２　第２転動体、５１　第１リターン路、５２　第２リターン路、６１　第１方向変換路、７０　第１保持部材、７１　第２保持部材、８１　第１支持部材、８２　第２支持部材、８３　第３支持部材、８４　第４支持部材、９１　第１穴、９２　第２穴、９３　第３穴、９４　第４穴、９５　第１投入穴、９６　第２投入穴、９７　第１蓋部材、９８　第２蓋部材、Ｄ１　長手方向、Ｄ２　幅方向、Ｄ３　上下方向。 1 linear motion guide unit, 10 rail, 11 first rail side rolling surface, 12 second rail side rolling surface, 15 first rail surface, 16 second rail surface, 20 slider, 21 casing, 22 first end cap , 22A concave portion, 23 second end cap, 24 casing body, 24A first end portion, 24B second end portion, 25 first sleeve portion, 26 second sleeve portion, 31 first casing side rolling surface, 32 second Casing side rolling surface 35 Second casing surface 36 First casing surface 37 Casing end surface 38 First casing side surface 39 Second casing side surface 41 First rolling element 42 Second rolling element 51 First return path, 52 second return path, 61 first direction change path, 70 first holding member, 71 second holding member, 81 first supporting member, 82 second supporting member, 83 third supporting member, 84 fourth supporting member , 91 first hole, 92 second hole, 93 third hole, 94 fourth hole, 95 first input hole, 96 second input hole, 97 first lid member, 98 second lid member, D1 longitudinal direction, D2 Width direction, D3 vertical direction.

Claims (4)

  1. 　レールと、
    　前記レールの長手方向に沿って移動可能なケーシングと、
    　前記レールおよび前記ケーシングの間に前記レールおよび前記ケーシングに接触しつつ転走可能に配置される複数の転動体と、
    　前記ケーシングの前記長手方向の両端に配置される一対の方向変換部材と、を備え、
    　前記レールは、前記長手方向に垂直な幅方向の両側に配置され、前記長手方向に延びる一対のレール側転走面を含み、
    　前記ケーシングは、
    　ケーシング本体と、
    　前記ケーシング本体の前記幅方向の両側に接続される一対の袖部と、を含み、
    　前記一対の袖部には、前記一対のレール側転走面に対向するとともに前記長手方向に延び、前記一対のレール側転走面との間に一対の転動体転走路を形成するケーシング側転走面が形成されており、
    　前記ケーシングには、前記一対のレール側転走面のそれぞれに沿って前記長手方向に延び、前記ケーシングを前記長手方向に貫通する貫通孔である一対のリターン路が形成されており、
    　前記一対の方向変換部材には、前記転動体転走路と前記リターン路とを繋ぐ方向変換路が形成されており、
    　前記転動体は、前記転動体転走路、前記リターン路および前記方向変換路によって形成される環状の軌道を循環し、
    　前記転動体を前記袖部との間で挟持し、前記長手方向に延びる一対の保持部材と、
    　前記保持部材を前記方向変換部材に対して支持する支持部材と、をさらに備え、
    　前記保持部材には、前記長手方向の一方の端面である第１端面に開口する第１穴が形成されており、
    　前記一対の方向変換部材のうち前記第１端面に対向する前記方向変換部材には、前記第１穴に連通し、前記方向変換部材を前記長手方向に貫通する第２穴が形成されており、
    　前記支持部材は、前記第１穴および前記第２穴に挿入されている、直動案内ユニット。     a rail;
    a casing movable along the longitudinal direction of the rail;
    a plurality of rolling elements disposed between the rail and the casing so as to be able to roll while contacting the rail and the casing;
    a pair of direction changing members arranged at both ends of the casing in the longitudinal direction;
    the rail includes a pair of rail-side rolling surfaces arranged on both sides in a width direction perpendicular to the longitudinal direction and extending in the longitudinal direction;
    The casing is
    a casing body;
    a pair of sleeves connected to both sides of the casing body in the width direction,
    Casing side rollers facing the pair of rail-side rolling surfaces and extending in the longitudinal direction to form a pair of rolling element rolling paths between the pair of sleeve portions and the pair of rail-side rolling surfaces. A running surface is formed,
    The casing is formed with a pair of return paths, which are through holes extending in the longitudinal direction along the pair of rail-side rolling surfaces and penetrating the casing in the longitudinal direction,
    A direction changing path connecting the rolling element rolling path and the return path is formed in the pair of direction changing members,
    The rolling elements circulate on an annular orbit formed by the rolling element rolling path, the return path, and the direction change path,
    a pair of holding members that sandwich the rolling elements between them and the sleeve portions and extend in the longitudinal direction;
    a support member that supports the holding member with respect to the direction changing member;
    The holding member is formed with a first hole that opens to a first end face that is one end face in the longitudinal direction,
    A second hole communicating with the first hole and penetrating the direction changing member in the longitudinal direction is formed in the direction changing member facing the first end surface of the pair of direction changing members,
    The linear motion guide unit, wherein the support member is inserted into the first hole and the second hole.
  2. 　前記第１穴は、前記保持部材を前記長手方向に貫通するように形成されている、請求項１に記載の直動案内ユニット。 The linear motion guide unit according to claim 1, wherein the first hole is formed so as to pass through the holding member in the longitudinal direction.
  3. 　前記保持部材には、
    　前記保持部材の内部に底を有する前記第１穴と、
    　前記第１端面と反対の第２端面に開口するとともに前記第１穴に対して離間し、前記保持部材の内部に底を有する第３穴と、が形成されている、請求項１に記載の直動案内ユニット。     The holding member has
    said first hole having a bottom inside said retaining member;
    2. A third hole that opens to a second end face opposite to the first end face, is spaced apart from the first hole, and has a bottom inside the holding member. Linear guide unit.
  4. 　前記長手方向に垂直な断面において、前記第１穴および前記第２穴は、前記長手方向および前記幅方向の両方に対して直交する上下方向の長さが前記幅方向の長さよりも長い形状を有する、請求項１から請求項３のいずれか１項に記載の直動案内ユニット。 In a cross section perpendicular to the longitudinal direction, the first hole and the second hole have a shape in which the length in the vertical direction orthogonal to both the longitudinal direction and the width direction is longer than the length in the width direction. A linear motion guide unit according to any one of claims 1 to 3, comprising:
PCT/JP2022/030871 2021-10-27 2022-08-15 Linear motion guide unit WO2023074087A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02163510A (en) * 1988-12-19 1990-06-22 Nippon Thompson Co Ltd Direct operated rolling guide unit
US20080232728A1 (en) * 2007-03-20 2008-09-25 Hiwin Technologies Corp. Linear motion guide apparatus
WO2013035212A1 (en) * 2011-09-07 2013-03-14 日本精工株式会社 Linear motion guide device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02163510A (en) * 1988-12-19 1990-06-22 Nippon Thompson Co Ltd Direct operated rolling guide unit
US20080232728A1 (en) * 2007-03-20 2008-09-25 Hiwin Technologies Corp. Linear motion guide apparatus
WO2013035212A1 (en) * 2011-09-07 2013-03-14 日本精工株式会社 Linear motion guide device

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