WO2020110754A1 - 運動案内装置 - Google Patents
運動案内装置 Download PDFInfo
- Publication number
- WO2020110754A1 WO2020110754A1 PCT/JP2019/044721 JP2019044721W WO2020110754A1 WO 2020110754 A1 WO2020110754 A1 WO 2020110754A1 JP 2019044721 W JP2019044721 W JP 2019044721W WO 2020110754 A1 WO2020110754 A1 WO 2020110754A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- inclined surface
- rolling
- moving body
- load
- guide device
- Prior art date
Links
Images
Classifications
-
- 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
- F16C29/0602—Details of the bearing body or carriage or parts thereof, e.g. methods for manufacturing or assembly
- F16C29/0609—Details of the bearing body or carriage or parts thereof, e.g. methods for manufacturing or assembly of the ends of the bearing body or carriage where the rolling elements change direction, e.g. end caps
-
- 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
- F16C29/0602—Details of the bearing body or carriage or parts thereof, e.g. methods for manufacturing or assembly
- F16C29/0604—Details of the bearing body or carriage or parts thereof, e.g. methods for manufacturing or assembly of the load bearing section
-
- 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
- F16C29/0602—Details of the bearing body or carriage or parts thereof, e.g. methods for manufacturing or assembly
- F16C29/0611—Details of the bearing body or carriage or parts thereof, e.g. methods for manufacturing or assembly of the return passages, i.e. the passages where the rolling elements do not carry 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
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
-
- 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
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/50—Crowning, e.g. crowning height or crowning radius
Definitions
- the present invention relates to a motion guide device in which a moving body is assembled to a track member so as to be relatively movable via a plurality of rolling bodies.
- the motion guide device includes a race member having a rolling element rolling surface, and a moving body having a load rolling element rolling surface facing the rolling element rolling surface of the race member.
- the rolling element rolling surface of the raceway member and the loaded rolling element rolling surface of the moving body form a load path.
- a ball moves in and out of the load path as the moving body moves relative to the track member.
- Crowning is formed at the end of the rolling surface of the loaded rolling element of the moving body in order to smooth the ball in and out of the load path (see Patent Document 1).
- the crowning depth is the amount of mutual approach between the moving body and the raceway member (the amount by which the contact portion of the rolling element elastically deforms and the moving body and the raceway member approach each other. It is the elastic deformation amount of the rolling element rolling surface, the load rolling element rolling surface of the moving body, and the rolling element). This is to prevent the rolling element entering the load path from colliding with the end of the moving body.
- the depth of the crowning is the amount of elastic deformation when a load of 50% or less of the basic dynamic load rating (C) is applied.
- the length of the crowning is set to be twice the diameter Da of the rolling element or less. This is because it has been considered that when the crowning is lengthened, the load capacity (that is, the rigidity) of the motion guide device is reduced, and the life of the motion guide device is shortened.
- the inventor when using the motion guide device in an environment in which an excessive moment acts, a phenomenon that has not been experienced so far, that is, the end of the load rolling element rolling surface of the mobile body has an early malfunction, We have found that the motion guide device rattles. This phenomenon causes a discrepancy between the calculated life and the actual life. This phenomenon may occur when the rigidity of the mounting member to which the motion guide device is mounted is insufficient or when the mounting accuracy of the motion guide device is insufficient.
- the reason why the end of the load rolling element rolling surface of the moving body becomes irregular is that the moving body tilts with respect to the track member about the left and right axes and the end of the load rolling element rolling surface of the moving body and the rolling member of the track member roll. This is because the gap between the moving body rolling surface becomes narrower. When the gap becomes narrow, the ball collides with the end of the crowning, and the end of the rolling contact surface of the loaded rolling member of the moving body becomes sick at an early stage. It is also considered that the load on the ball increases at the boundary between the load rolling element rolling surface and the crowning of the moving body with the smallest clearance.
- the present invention has been made in view of the above problems, and an object thereof is to provide a motion guide device that can prevent the motion guide device from rattling early even when used in an environment where an excessive moment acts.
- one aspect of the present invention includes a race member having a rolling element rolling surface, and a load rolling element rolling surface facing the rolling element rolling surface of the race member, and a plurality of A moving body that is relatively movably assembled to the raceway member via the rolling body of the present invention, and a crowning is formed at the end of the rolling surface of the rolling body of the moving body, and the crowning is performed.
- a chamfered portion is formed at an end portion of the moving body, the entire length of the crowning and the chamfered portion in the length direction of the loaded rolling element rolling surface of the moving body is L, and the diameter of the rolling element is Da, L/Da It is a motion guide device set to >4.
- another aspect of the present invention includes a track member having a rolling element rolling surface, and a moving body movably assembled to the track member via a plurality of rolling elements,
- the moving body has a load rolling body rolling surface facing the rolling body rolling surface of the track member and a moving body main body having a return path substantially parallel to the load rolling body rolling surface, and the moving body main body.
- a motion guide device provided at an end portion and having a lid member having a direction change path connected to the load rolling element rolling surface of the moving body and the return path, the load rolling of the moving body is provided.
- a first inclined surface that is inclined with respect to the load rolling element rolling surface is formed at the end of the moving body rolling surface, and a second inclination that is larger than the first inclined surface is formed at the end of the first inclined surface.
- One aspect of the present invention is contrary to the conventional wisdom that the longer and deeper the crowning, the lower the load capacity and the shorter the life of the motion guide device, the longer the crowning and the ball at the end of the crowning.
- a chamfered portion for collision prevention is formed to prevent early rattling of the motion guide device when an excessive moment acts.
- the chamfered portion is formed at the end of the crowning, the ball entering the load path collides with the end of the moving body even if the moving body is inclined relative to the track member. Can be prevented. Further, since the total length L of the crowning and the chamfered portion is increased, it is possible to increase the number of balls that can receive a load when the moving body is relatively inclined with respect to the track member, and an excessive load is applied to each ball. This can be prevented.
- L 1 ⁇ 1 Da and L 2 ⁇ 1 Da are set, when the movable body is relatively inclined with respect to the track member, the first inclined surface of the movable body and the second inclined surface A plurality of rolling elements on the inclined surface can be loaded, and an excessive load can be prevented from being applied to each rolling element. Moreover, since L 1 >L 2 is set, the load capacity of the motion guide device can be further increased.
- FIG. 1 It is a perspective view of the motion guide device of the 1st Embodiment of this invention. It is sectional drawing of the circulation path of the motion guide apparatus of this embodiment. It is a cross-sectional view (cross-sectional view orthogonal to the moving direction) of the motion guide device of the present embodiment. It is the crowning and chamfer as seen in the cross section in the contact angle direction. It is a schematic diagram which shows the relationship between an inclined surface and the number of balls. It is a schematic diagram which compared the state which the moving body inclined with the conventional motion guide device and the motion guide device of this embodiment (FIGS.6(a)(b) shows the conventional motion guide device, FIG. c) shows the motion guide device of the present embodiment). FIG.
- FIG. 7 is a schematic diagram illustrating how the number of loaded balls changes due to the influence of the tilt of the moving body (FIG. 7A shows a conventional motion guide device, and FIG. The motion guide apparatus of embodiment is shown). It is a figure which shows the other example of the crowning and the chamfer which were seen in the cross section of a contact angle direction.
- FIG. 9A is a graph showing the load on the ball of the conventional motion guide device with standard crowning
- FIG. 9B is a graph showing the load on the ball of the motion guide device of the present embodiment. ..
- It is a perspective view of the motion guide device of the 2nd Embodiment of this invention. It is sectional drawing of the circulation path of the motion guide apparatus of this embodiment.
- FIG. 16(a) shows a conventional motion guide device
- Fig. 16(a) shows a conventional motion guide device
- FIG. 16(b) shows a book.
- the motion guide apparatus of embodiment is shown). It is a figure which shows the other example of the rolling surface shape seen in the cross section of a contact angle direction.
- FIG. 18A is a graph showing the load on the ball of the conventional motion guide device with standard crowning
- FIG. 18B is a graph showing the load on the ball of the motion guide device of the present embodiment. ..
- FIG. 1 shows a perspective view of a motion guide device according to a first embodiment of the present invention.
- the motion guide device is arranged on a horizontal plane, and the configuration of the motion guide device is used by using the directions viewed from the length direction of the rail as the track member, that is, the front-back, up-down, and left-right directions in FIG. Will be explained.
- the arrangement of the motion guide device is not limited to this.
- the motion guide device 1 includes a rail 2 and a moving body 3 that is mounted on the rail 2 so as to be relatively movable in the longitudinal direction.
- a plurality of ball rolling surfaces 2a as rolling element rolling surfaces are formed along the longitudinal direction.
- the ball rolling surface 2a has a groove shape.
- a plurality of bolt holes 2b for mounting the rail 2 on the mounting member 8 (see FIG. 3) at a constant pitch are formed.
- the moving body 3 includes a moving body 4 and lid members 5 provided at both ends of the moving body 4.
- a circulation path 7 (see FIG. 2) for the ball 6 is formed inside the moving body 3.
- the balls 6 as a plurality of rolling elements circulate in the circulation path 7.
- a plurality of screw holes 4a for attaching the moving body 3 to the mounting member 9 (see FIG. 3) are formed on the upper surface of the moving body 4.
- FIG. 2 shows a cross-sectional view of the circulation path 7 of the motion guide device 1 of this embodiment.
- the moving body 4 is provided with a loaded ball rolling surface 4b as a loaded rolling body rolling surface facing the ball rolling surface 2a of the rail 2 and a return path substantially parallel to the loaded ball rolling surface 4b. 4c is formed.
- the loaded ball rolling surface 4b has a groove shape.
- the cover member 5 is formed with a direction change path 11 connected to the loaded ball rolling surface 4b and the return path 4c.
- the lid member 5 includes an inner peripheral guide portion 5a forming an inner peripheral side of the direction changing passage 11 and an outer peripheral guide portion 5b forming an outer peripheral side of the direction changing passage 11.
- the load path 10 is constituted by the loaded ball rolling surface 4b of the moving body 3 and the ball rolling surface 2a of the rail 2.
- the load path 10, the return path 4c, and the direction change path 11 constitute a circulation path 7 for the ball 6.
- the ball 6 enters the load path 10 from the direction change path 11 and exits from the load path 10 to the direction change path 11. Spacers may or may not be interposed between the balls 6.
- the motion guide device 1 is used in an environment where an excessive moment, particularly a pitching moment acts.
- the moving body 3 tilts with respect to the rail 2 with the left and right axes.
- FIG. 3 shows a sectional view of the motion guide device 1.
- 2 is a rail
- 4 is a moving body
- 8 and 9 are mounting members
- 6 is a ball.
- the return path 4c of the moving body 4 is omitted.
- FIG. 4 shows the crowning and the chamfered portion as seen in a cross section in the contact angle direction.
- the general mounting members 8 and 9 are, for example, the base of a machine tool and are rigid bodies. However, when the mounting member 8 is a hollow member or the like having low rigidity, the rigidity of the mounting member 8 is insufficient, the rail 2 is deformed, and the rail 2 tilts with respect to the moving body 3. The same applies when the mounting accuracy of the motion guide device 1 is insufficient. That is, the motion guiding device 1 of the present embodiment is not only used when an excessive pitching moment acts, but also when the rigidity of the mounting members 8 and 9 is insufficient or when the mounting accuracy of the motion guiding device 1 is insufficient. Can be used.
- the crowning 12 is formed at both ends of the loaded ball rolling surface 4b of the moving body 3.
- Chamfers 13 are formed at both ends of the crowning 12.
- 2 shows the crowning 12 and the chamfered portion 13 at one end of the loaded ball rolling surface 4b, the crowning 12 and the chamfered portion 13 are formed at both ends of the loaded ball rolling surface 4b.
- the crowning 12 is inclined with respect to the loaded ball rolling surface 4b.
- the chamfered portion 13 is inclined with respect to the crowning 12 and has a greater inclination than the crowning 12.
- the total length (that is, 2L) of the crowning 12 and the chamfered portion 13 at both ends of the moving body 3 is set to, for example, 10 to 50% of the total length of the moving body 4 in the relative movement direction.
- the crowning 12 includes a first inclined surface 21, a second inclined surface 22, and a third inclined surface 23.
- the first inclined surface 21 is formed adjacent to the loaded ball rolling surface 4b and is inclined with respect to the loaded ball rolling surface 4b.
- the second inclined surface 22 is formed adjacent to the first inclined surface 21, and has a larger inclination than the first inclined surface 21.
- the third inclined surface 23 is formed adjacent to the second inclined surface 22 and has a larger inclination than the second inclined surface 22.
- the chamfered portion 13 is formed adjacent to the third inclined surface 23 and has a larger inclination than the third inclined surface 23.
- the angle formed by the loaded ball rolling surface 4b and the first inclined surface 21 is ⁇ 1
- the angle formed by the loaded ball rolling surface 4b and the second inclined surface 22 is ⁇ 2
- the loaded ball rolling surface 4b and the third inclined surface 23 is ⁇ 1 ⁇ 2 ⁇ 3 ⁇ 4, where ⁇ 3 is the angle formed by and the angle formed by the loaded ball rolling surface 4b and the chamfered portion 13 is ⁇ 4.
- FIG. 4 shows the crowning 12 and the chamfered portion 13 as seen in a cross section in the contact angle direction.
- the contact angle ⁇ is an angle formed by a line 15 connecting the ball contact point on the rail 2 side and the ball contact point on the moving body 3 side and the acting direction 16 of the radial load.
- the contact angle ⁇ is 45°, it means that the ball rolling surface 2a and the loaded ball rolling surface 4b are in contact with the ball 6 at an angle of 45° with respect to the acting direction 16 of the radial load.
- the maximum depth D of the chamfered portion 13 shown in FIG. 4 is 60% or more of the basic dynamic load rating (C) (for example, 60%, 70%). %, 80%, 90%, 100%, etc.) and the elastic deformation amounts of the ball rolling surface 2a and the loaded ball rolling surface 4b and the ball 6 when a radial load is applied are set to be equal to or more than the elastic deformation amount.
- the crowning depth D 1 from the loaded ball rolling surface 4b to the intersection of the extension line 17 of the crowning 12 (in this embodiment, the extension line 17 of the third inclined surface 23) and the end surface 18 of the moving body 4 is increased. Is set to be equal to or more than the elastic deformation amount when a radial load of 60% or more of the basic dynamic load rating (C) acts.
- the basic dynamic load rating (C) is determined by the structure of the motion guide device 1.
- the lengths L 1 , L 2 , and L 3 of the first inclined surface 21, the second inclined surface 22, and the third inclined surface 23 of the crowning 12 are set as follows.
- the first inclined surface 21 is a region where the load is greatest when the moving body 3 is inclined. Therefore, the length L 1 of the first inclined surface 21 is set to 1 Da or more. Desirably, it is set to 2 Da or more. As shown in FIG. 5, when the length is 1 Da, one ball 6 comes out and a new ball 6 comes in at the same time, so that a maximum of two balls 6 come in.
- the second inclined surface 22 is a region to which a load is applied similarly to the first inclined surface 21, although not so much as the first inclined surface 21.
- the length L 2 of the second inclined surface 22 is set to 1 Da or more.
- L 1 >L 2 is set. In this embodiment, L 2 is set to 1 to 1.5 Da.
- the third inclined surface 23 is an area where the movable body 3 has an inclination similar to that of the conventional crowning and starts receiving a load when the movable body 3 is inclined. As described above, the third inclined surface 23 has a larger inclination than the second inclined surface 22. When two balls 6 enter the third inclined surface 23, most of the balls 6 near the second inclined surface 22 receive a load, so the length L 3 of the third inclined surface 23 is set to 1 Da or less. In this embodiment, L 3 ⁇ L 2 .
- the chamfered portion 13 is intended to avoid collision of the ball 6 at the end of the moving body 3.
- the crowning 12 has two sloping surfaces 21, 22 or two sloping surfaces 21 in consideration of workability and processing accuracy. , 23 can also be provided.
- FIG. 6 is a schematic diagram comparing the conventional motion guide device 31 and the motion guide device 1 of the present embodiment in which the moving bodies 3 and 33 are tilted.
- 6(a) and 6(b) show a conventional motion guide device 31
- FIG. 6(c) shows the motion guide device 1 of the present embodiment.
- the balls 36 inside the moving body 33 are loaded substantially evenly so that the balls 36 at the end portions of the moving body 33 are not loaded.
- the crowning 42 is designed.
- the moving body 33 tilts about the left and right axes.
- the gap between the end of the moving body 33 and the rail 32 becomes narrower than the diameter of the ball 36, and the circulating ball 36 collides with the end of the moving body main body 34, and the moving body main body 34 collides.
- the end of 34 will get upset early.
- the load on the ball 36 increases at the boundary between the loaded ball rolling surface 34b and the crowning 42, which further narrows the gap, and the boundary also becomes distorted early.
- the crowning 12 is lengthened and the chamfered portion 13 for preventing the collision of the ball 6 is formed at the end of the crowning 12. Since the chamfered portion 13 is formed at the end of the crowning 12, the ball 6 entering the load path 10 can be prevented from colliding with the end of the moving body 4 even if the moving body 3 is tilted. Further, since the total length L of the crowning 12 and the chamfered portion 13 is increased, the number of balls 6 to be loaded can be increased even if the moving body 3 is tilted, and an excessive load is prevented from being applied to each ball 6. it can.
- FIG. 7 is a schematic diagram illustrating how the number of balls 6 and 36 to which a load changes due to the influence of the inclination of the moving bodies 3 and 33.
- the two-dot chain line in FIG. 7 is the conventional crowning shape (crowning 42), and the solid line is the crowning shape (crowning 12, chamfer 13) of this embodiment.
- 2 and 32 are rails, 3 and 33 are moving bodies, and 6 and 36 are balls.
- FIG. 7( a ) a state in which the ball 36 is elastically deformed by an excessive pitching moment is deformed by placing a two-dot chain line clan shape near the center of the ball 36.
- the third ball 36 from the end causes the largest elastic deformation.
- the ball 36 that receives a load is a ball 36 that intersects with the chain double-dashed line, and the five shaded white balls 36 are loaded.
- FIG. 7B shows a state in which an excessive pitching moment is applied in the crowning shape of the present embodiment, as in FIG. 7A.
- the ball 6 that causes the largest elastic deformation is the fourth ball 6.
- the balls 6 that receive a load are the balls 6 that intersect the solid line, and the seven balls 6 that are hatched receive the load. It can be seen that the number of balls subjected to the load is larger than that in the case of FIG.
- FIG. 8 shows another example of the crowning 52 and the chamfered portion 53 as seen in the cross section in the contact angle direction.
- an arcuate R portion 64 is formed between the first inclined surface 61 and the second inclined surface 62
- an arcuate R portion 65 is formed between the second inclined surface 62 and the third inclined surface 63
- an arcuate R portion 66 is formed between the third inclined surface 63 and the chamfered portion 53.
- the chamfered portion 13 is formed at the end of the crowning 12, the ball 6 entering the load path 10 is prevented from colliding with the end of the moving body 3 even if the moving body 3 is inclined relative to the rail 2. it can. Further, since the total length L of the crowning 12 and the chamfered portion 13 is lengthened to L/Da>4, when the moving body 3 is relatively tilted with respect to the rail 2, the number of balls 6 that can be loaded is increased. Therefore, it is possible to prevent an excessive load from being applied to each ball 6.
- the maximum depth D of the chamfered portion 13 is equal to or more than the elastic deformation amount of the ball rolling surface 2a, the loaded ball rolling surface 4b and the ball 6 when a radial load of 60% or more of the basic dynamic load rating (C) is applied. Since the setting is made, it is possible to reliably prevent the ball 6 from colliding with the end portion of the movable body 4.
- the length La of the chamfered portion 13 is set to 1 Da or less, it is possible to prevent the number of effective balls that can be loaded from decreasing.
- the length L 1 of the first inclined surface 21 is set to 1 Da or more
- the length L 2 of the second inclined surface 22 is set to 1 Da or more
- L 1 >L 2 is set. Therefore, when the moving body 3 tilts, the crowning 12
- the number of balls 6 that receive a load can be increased. Further, the ball 6 moves smoothly on the crowning 12.
- the ball 6 can smoothly move in and out of the crowning 12. Further, since the length L 3 of the third inclined surface 23 is set to 1 Da or less, two balls 6 enter the third inclined surface 23 having a large inclination and most of the balls 6 near the second inclined surface 22 are loaded. Can be prevented.
- the rolling element is not limited to the ball 6 and may be a roller.
- a roller is used as the rolling element, there is a possibility that skew, which is a phenomenon in which the roller tilts when an excessive pitching moment is applied, may occur. This can be prevented by using the balls 6 for the rolling elements.
- the movement of the moving body relative to the track member is relative, and the moving body may move or the track member may move.
- first inclined surface, the second inclined surface, the third inclined surface, and the chamfered portion in a curved shape when viewed in a cross section in the contact angle direction.
- FIG. 9A shows the load of the ball 36 of the conventional motion guide device 31 that has been subjected to standard crowning
- FIG. 9B shows the load of the ball 6 of the motion guide device 1 of the present embodiment. Since there are four ball rows, the loads of the four ball rows are shown in FIGS. 9A and 9B.
- FIG. 10 shows a perspective view of a motion guide device according to a second embodiment of the present invention.
- the configuration of the motion guide device will be described by arranging the motion guide device on a horizontal plane and using the directions viewed from the length direction of the rail, that is, the front-back, up-down, and left-right directions in FIG.
- the arrangement of the motion guide device is not limited to this.
- the motion guide device 1 includes a rail 2 as a track member, and a moving body 3 that is mounted on the rail 2 via a plurality of balls 6 as rolling elements (see FIG. 11) so as to be relatively movable in the longitudinal direction. ..
- a plurality of ball rolling surfaces 2a as rolling element rolling surfaces are formed along the longitudinal direction.
- the ball rolling surface 2a has a groove shape.
- a plurality of bolt holes 2b for attaching the rail 2 to the attachment member 8 are formed on the upper surface of the rail 2 at a constant pitch.
- the moving body 3 includes a moving body 4 and lid members 5 provided at both ends of the moving body 4.
- a circulation path 7 (see FIG. 11) for the ball 6 is formed inside the moving body 3. With the relative movement of the moving body 3, the plurality of balls 6 circulate in the circulation path 7.
- a plurality of screw holes 4 a for attaching the moving body 3 to the mounting member 9 (see FIG. 12) are formed on the upper surface of the moving body 4.
- FIG. 11 shows a sectional view of the circulation path 7 of the motion guide device 1 of the present embodiment.
- the moving body 4 is provided with a loaded ball rolling surface 4b as a loaded rolling body rolling surface facing the ball rolling surface 2a of the rail 2 and a return path substantially parallel to the loaded ball rolling surface 4b. 4c is formed.
- the loaded ball rolling surface 4b has a groove shape.
- the cover member 5 is formed with a direction change path 11 connected to the loaded ball rolling surface 4b and the return path 4c.
- the lid member 5 includes an inner peripheral guide portion 5a forming an inner peripheral side of the direction changing passage 11 and an outer peripheral guide portion 5b forming an outer peripheral side of the direction changing passage 11.
- a load path 10 is configured by the loaded ball rolling surface 4b of the moving body 3 and the ball rolling surface 2a of the rail 2.
- the load path 10, the return path 4c, and the direction change path 11 form a circulation path 7 for the ball 6.
- the ball 6 enters the load path 10 from the direction change path 11 and exits from the load path 10 to the direction change path 11. Spacers may or may not be interposed between the balls 6.
- the motion guide device 1 is used in an environment where an excessive moment, particularly a pitching moment acts.
- the moving body 3 tilts with respect to the rail 2 with the left and right axes.
- FIG. 12 shows a sectional view of the motion guide device 1.
- 2 is a rail
- 4 is a moving body
- 8 and 9 are mounting members
- 6 is a ball.
- the return path 4c of the moving body 4 is omitted.
- FIG. 13 shows the rolling surface shape as seen in the cross section in the contact angle direction.
- the general mounting members 8 and 9 are, for example, the base of a machine tool and are rigid bodies. However, when the mounting member 8 is a hollow member or the like having low rigidity, the rigidity of the mounting member 8 is insufficient, the rail 2 is deformed, and the rail 2 tilts with respect to the moving body 3. The same applies when the mounting accuracy of the motion guide device 1 is insufficient. That is, the motion guide device 1 according to the present embodiment is not only used when an excessive pitching moment is exerted, but also when the rigidity of the attachment members 8 and 9 is insufficient or when the attachment accuracy of the motion guide device 1 is insufficient. Can be used.
- FIG. 11 shows the first inclined surface 21, the second inclined surface 22, the third inclined surface 23, and the chamfered portion 13 at one end of the loaded ball rolling surface 4b. These are formed in the part.
- the first inclined surface 21 is formed adjacent to the loaded ball rolling surface 4b and is inclined with respect to the loaded ball rolling surface 4b.
- the second inclined surface 22 is formed adjacent to the first inclined surface 21, and has a larger inclination than the first inclined surface 21.
- the third inclined surface 23 is formed adjacent to the second inclined surface 22 and has a larger inclination than the second inclined surface 22.
- the chamfered portion 13 is formed adjacent to the third inclined surface 23 and has a larger inclination than the third inclined surface 23.
- the angle formed by the loaded ball rolling surface 4b and the first inclined surface 21 is ⁇ 1
- the angle formed by the loaded ball rolling surface 4b and the second inclined surface 22 is ⁇ 2
- the loaded ball rolling surface 4b and the third inclined surface Assuming that the angle formed by the surface 23 is ⁇ 3 and the angle formed by the loaded ball rolling surface 4 b and the chamfered portion 13 is ⁇ 4 , ⁇ 1 ⁇ 2 ⁇ 3 ⁇ 4 is set.
- FIG. 13 shows the first inclined surface 21, the second inclined surface 22, the third inclined surface 23, and the chamfered portion 13 as seen in the cross section in the contact angle direction.
- the contact angle ⁇ is an angle formed by the line 15 connecting the ball contact point on the rail 2 side and the ball contact point on the moving body 3 side and the acting direction 16 of the radial load.
- the contact angle ⁇ is 45°, it means that the ball rolling surface 2a and the loaded ball rolling surface 4b are in contact with the ball 6 at an angle of 45° with respect to the acting direction 16 of the radial load.
- the lengths L 1 , L 2 and L 3 of the first inclined surface 21, the second inclined surface 22 and the third inclined surface 23 are set as follows.
- the first inclined surface 21 is a region where the load is greatest when the moving body 3 is inclined. Therefore, the length L 1 of the first inclined surface 21 is set to 1 Da or more, where the diameter of the ball 6 is Da. Desirably, it is set to 2 Da or more. Note that, as shown in FIG. 14, when the length is 1 Da, one ball 6 comes out and a new ball 6 comes in at the same time, so a maximum of two balls 6 come in.
- the second inclined surface 22 is a region to which a load is applied similarly to the first inclined surface 21, although not so much as the first inclined surface 21.
- the length L 2 of the second inclined surface 22 is set to 1 Da or more.
- L 1 >L 2 is set. In this embodiment, L 2 is set to 1 to 1.5 Da.
- the third inclined surface 23 is an area where the movable body 3 has an inclination similar to that of the conventional crowning and starts receiving a load when the movable body 3 is inclined. As described above, the third inclined surface 23 has a large inclination. When two balls 6 enter the third inclined surface 23, most of the balls 6 near the second inclined surface 22 receive a load, so the length L 3 of the third inclined surface 23 is set to 1 Da or less. In the present embodiment, L 2 >L 3 is set.
- the chamfered portion 13 is intended to avoid collision of the ball 6 at the end of the moving body 3.
- the length L from the starting point S where the first inclined surface 21 starts to be formed on the loaded ball rolling surface 4b to the end surface 4d of the moving body 4 is set to L/Da>4. .. Desirably, L/Da ⁇ 5 is set.
- the total length of the lengths L of both ends (that is, 2L) is set to, for example, 10 to 50% of the total length of the moving body 4 in the relative movement direction.
- the maximum depth D of the chamfered portion 13 shown in FIG. 13 is 60% or more of the basic dynamic load rating (C) (for example, 60%, 70%). %, 80%, 90%, 100%, etc.) and the elastic deformation amounts of the ball rolling surface 2a and the loaded ball rolling surface 4b and the ball 6 when a radial load is applied are set to be equal to or more than the elastic deformation amount. Further, the depth D 1 from the loaded ball rolling surface 4b to the intersection of the extension line 17 of the third inclined surface 23 and the end surface 4d of the moving body 4 is also 60% or more of the basic dynamic load rating (C). It is set more than the elastic deformation amount when a radial load is applied.
- the basic dynamic load rating (C) is determined by the structure of the motion guide device 1.
- FIG. 15 is a schematic diagram comparing the conventional motion guide device 31 and the motion guide device 1 of this embodiment in which the moving bodies 3 and 33 are tilted.
- 15A and 15B show a conventional motion guide device 31, and
- FIG. 15C shows the motion guide device 1 of the present embodiment.
- the balls 36 inside the moving body 33 are loaded substantially evenly so that the balls 36 at the end portions of the moving body 33 are not loaded.
- the crowning 42 is designed.
- the moving body 33 tilts about the left and right axes.
- the gap between the end of the moving body 33 and the rail 32 becomes narrower than the diameter of the ball 36, and the circulating ball 36 collides with the end of the moving body main body 34, and the moving body main body 34 collides.
- the end of 34 will get upset early.
- the load on the ball 36 increases at the boundary between the loaded ball rolling surface 34b and the crowning 42, which further narrows the gap, and the boundary also becomes distorted early.
- the first inclined surface 21, the second inclined surface 22, and the third inclined surface 23 are formed at the ends of the loaded ball rolling surface 4b. Therefore, when the moving body 3 is relatively inclined with respect to the rail 2, the plurality of balls 6 on the first inclined surface 21, the second inclined surface 22, and the third inclined surface 23 can receive loads, and It is possible to prevent an excessive load from being applied to the ball 6. Further, since the chamfered portion 13 for collision prevention is formed at the end of the moving body 4, it is possible to prevent the ball 6 entering the load path 10 from colliding with the end of the moving body 4 even if the moving body 3 is tilted. It can be prevented.
- FIG. 16 is a schematic diagram for explaining how the number of loaded balls 6, 36 changes due to the influence of the inclination of the moving bodies 3, 33.
- the two-dot chain line in FIG. 16 is the conventional rolling surface shape (crowning 42), and the solid line is the rolling surface shape of the present embodiment (first inclined surface 21, second inclined surface 22, third inclined surface 23, chamfering). Part 13).
- 2 and 32 are rails, 3 and 33 are moving bodies, and 6 and 36 are balls.
- FIG. 16( a ) a state in which the ball 36 is elastically deformed by an excessive pitching moment is deformed by disposing a two-dot chain line crowning 42 near the center of the ball 36.
- the third ball 36 from the end undergoes the greatest elastic deformation.
- the ball 36 that receives a load is a ball 36 that intersects with the chain double-dashed line, and the five balls 36 with diagonal lines receive a load.
- FIG. 16( b) shows a state in which an excessive pitching moment is applied to the rolling surface shape of the present embodiment, as in FIG. 16( a ).
- the ball 6 that causes the largest elastic deformation is the fourth ball 6.
- the balls 6 that receive a load are the balls 6 that intersect the solid line, and the seven balls 6 that are hatched receive the load. It can be seen that the number of balls subjected to the load is larger than that in the case of FIG.
- FIG. 17 shows another example of the rolling contact surface shape as seen in the cross section in the contact angle direction.
- an arcuate R portion 64 is formed between the first inclined surface 61 and the second inclined surface 62
- an arcuate R portion 65 is formed between the second inclined surface 62 and the third inclined surface 63
- an arcuate R portion 66 is formed between the third inclined surface 63 and the chamfered portion 53.
- the moving body 3 with respect to the rail 2 is set. Is relatively inclined, the plurality of balls 6 on the first inclined surface 21 and the second inclined surface 22 can be loaded, and it is possible to prevent each ball 6 from being overloaded. Further, since L 1 >L 2 is set, the load capacity of the motion guide device 1 can be further increased.
- the ball 6 can smoothly move in and out of the third inclined surface 23 as in the conventional crowning. You can Further, since the length L 3 of the third inclined surface 23 is set to 1 Da or less, two balls 6 enter the third inclined surface 23 having a large inclination and most of the balls 6 near the second inclined surface 22 are loaded. Can be prevented.
- the chamfered portion 13 having a larger inclination than the third inclined surface 23 is formed at the end of the movable body 4, the ball 6 that enters the load path 10 when the movable body 3 is relatively inclined with respect to the rail 2. It is possible to prevent the collision with the end of the moving body 4. Further, since the length La of the chamfered portion 13 is set to 1 Da or less, it is possible to prevent the number of effective balls that can be loaded from decreasing.
- L/Da>4 is set, When the moving body 3 is tilted relative to the rail 2, the number of balls 6 that can receive a load can be increased, and an excessive load can be prevented from being applied to each ball 6.
- the rolling element is not limited to a ball, but may be a roller.
- a roller is used as the rolling element, there is a possibility that skew, which is a phenomenon in which the roller tilts when an excessive pitching moment is applied, may occur. This can be prevented by using balls for the rolling elements.
- the movement of the moving body relative to the track member is relative, and the moving body may move or the track member may move.
- first inclined surface, the second inclined surface, the third inclined surface, and the chamfered portion in a curved shape when viewed in a cross section in the contact angle direction.
- FIG. 18(a) shows the load on the ball 36 of the conventional motion guide device 31 with standard crowning
- FIG. 18(b) shows the load on the ball 6 of the motion guide device 1 of the present embodiment. Since there are four ball rows, the loads of the four ball rows are shown in FIGS. 18(a) and 18(b).
- the load on the ball 6 (indicated by C in the figure) at the end of the moving body 4 becomes zero, that is, the moving body 4
- the ball 6 no longer collided with the end portion of No. 4 and the maximum load of the ball 6 (indicated by D in the figure) could be reduced to about 80% as compared with FIG. Therefore, it has been found that the calculated running life is longer than twice.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bearings For Parts Moving Linearly (AREA)
- Vehicle Body Suspensions (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Steering Controls (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
(第1の実施形態)
(第2の実施形態)
Claims (9)
- 転動体転走面を有する軌道部材と、前記軌道部材の前記転動体転走面に対向する負荷転動体転走面を有し、複数の転動体を介して前記軌道部材に相対移動可能に組み付けられる移動体と、を備える運動案内装置において、
前記移動体の前記負荷転動体転走面の端部にクラウニングを形成すると共に、前記クラウニングの端部に面取り部を形成し、
前記移動体の前記負荷転動体転走面の長さ方向における前記クラウニングと前記面取り部の全長をLとし、前記転動体の直径をDaとして、
L/Da>4に設定する運動案内装置。 - 前記移動体の前記負荷転動体転走面からの前記面取り部の最大深さDを、基本動定格荷重(C)の60%以上のラジアル荷重が働いたときの前記軌道部材の前記転動体転走面、前記移動体の前記負荷転動体転走面及び前記転動体の弾性変形量以上に設定することを特徴とする請求項1に記載の運動案内装置。
- 前記長さ方向における前記面取り部の長さLaを、1Da以下に設定することを特徴とする請求項1又は2に記載の運動案内装置。
- 前記クラウニングが、前記移動体の前記負荷転動体転走面に隣接して形成された第1傾斜面と、前記第1傾斜面に隣接して形成され、前記第1傾斜面よりも傾きが大きい第2傾斜面と、を備え、
前記長さ方向における前記第1傾斜面の長さをL1、前記長さ方向における前記第2傾斜面の長さをL2として、
L1≧1Da、L2≧1Da、かつL1>L2に設定することを特徴とする請求項1ないし3のいずれか一項に記載の運動案内装置。 - 前記クラウニングが、前記第2傾斜面に隣接して形成され、前記第2傾斜面よりも傾きが大きい第3傾斜面を備え、
前記長さ方向における前記第3傾斜面の長さをL3として、
L3≦1Daに設定することを特徴とする請求項4に記載の運動案内装置。 - 転動体転走面を有する軌道部材と、前記軌道部材に複数の転動体を介して移動可能に組み付けられる移動体と、を備え、
前記移動体は、前記軌道部材の前記転動体転走面に対向する負荷転動体転走面及びこの負荷転動体転走面と略平行な戻し路を有する移動体本体と、前記移動体本体の端部に設けられ、前記移動体本体の前記負荷転動体転走面と前記戻し路に接続される方向転換路を有する蓋部材と、を備える運動案内装置において、
前記移動体本体の前記負荷転動体転走面の端部に前記負荷転動体転走面に対して傾斜する第1傾斜面を形成し、
前記第1傾斜面の端部に前記第1傾斜面よりも傾きが大きい第2傾斜面を形成し、
前記移動体本体の前記負荷転動体転走面の長さ方向における前記第1傾斜面の長さをL1、前記長さ方向における前記第2傾斜面の長さをL2、前記転動体の直径をDaとして、
L1≧1Da、L2≧1Da、かつL1>L2に設定する運動案内装置。 - 前記第2傾斜面の端部に前記第2傾斜面よりも傾きが大きい第3傾斜面を形成し、
前記長さ方向における前記第3傾斜面の長さをL3として、
L3≦1Daに設定することを特徴とする請求項6に記載の運動案内装置。 - 前記第3傾斜面と前記移動体本体の端面との間に前記第3傾斜面よりも傾きが大きい面取り部を形成し、
前記長さ方向における前記面取り部の長さをLaとして、
La≦1Daに設定することを特徴とする請求項7に記載の運動案内装置。 - 前記移動体本体の前記負荷転動体転走面に前記第1傾斜面が形成され始めた始点から前記移動体本体の前記端面までの長さをLとして、
L/Da>4に設定することを特徴とする請求項8に記載の運動案内装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201980078141.6A CN113167322B (zh) | 2018-11-27 | 2019-11-14 | 运动引导装置 |
US17/297,161 US11852192B2 (en) | 2018-11-27 | 2019-11-14 | Motion guide apparatus |
DE112019005901.7T DE112019005901T5 (de) | 2018-11-27 | 2019-11-14 | Bewegungsführungsvorrichtung |
JP2020558338A JP7474199B2 (ja) | 2018-11-27 | 2019-11-14 | 運動案内装置 |
KR1020217019451A KR20210094028A (ko) | 2018-11-27 | 2019-11-14 | 운동 안내 장치 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018220828 | 2018-11-27 | ||
JP2018-220829 | 2018-11-27 | ||
JP2018-220828 | 2018-11-27 | ||
JP2018220829 | 2018-11-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020110754A1 true WO2020110754A1 (ja) | 2020-06-04 |
Family
ID=70852127
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2019/044721 WO2020110754A1 (ja) | 2018-11-27 | 2019-11-14 | 運動案内装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US11852192B2 (ja) |
JP (1) | JP7474199B2 (ja) |
KR (1) | KR20210094028A (ja) |
CN (1) | CN113167322B (ja) |
DE (1) | DE112019005901T5 (ja) |
TW (1) | TWI813814B (ja) |
WO (1) | WO2020110754A1 (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004169830A (ja) * | 2002-11-20 | 2004-06-17 | Meiji Univ | 転がり機械要素 |
JP2006316886A (ja) * | 2005-05-12 | 2006-11-24 | Nsk Ltd | 直動案内装置 |
JP2008133837A (ja) * | 2006-11-27 | 2008-06-12 | Nsk Ltd | 直動案内装置 |
JP2008291932A (ja) * | 2007-05-25 | 2008-12-04 | Nippon Thompson Co Ltd | ローラ形式の直動案内ユニット |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5363741A (en) * | 1992-12-24 | 1994-11-15 | Smc Kabushiki Kaisha | Slide actuator |
JP4423851B2 (ja) * | 2002-02-28 | 2010-03-03 | 日本精工株式会社 | 直動案内装置の製造方法 |
JP2004036838A (ja) * | 2002-07-05 | 2004-02-05 | Yoshiteru Kitahama | 直動滑軸受 |
JP4329324B2 (ja) * | 2002-10-18 | 2009-09-09 | 日本精工株式会社 | リニアガイド装置 |
JP2004324737A (ja) | 2003-04-23 | 2004-11-18 | Nsk Ltd | リニアガイド装置 |
JP2005337455A (ja) | 2004-05-28 | 2005-12-08 | Nsk Ltd | リニアガイド装置 |
US7645072B2 (en) * | 2004-05-12 | 2010-01-12 | Thk Co., Ltd. | Rolling machine element |
CN101368594B (zh) * | 2008-09-24 | 2011-02-02 | 宁波恒力汽配轴承有限公司 | 微小型直线轴承及其制造方法 |
JP5932926B2 (ja) * | 2014-09-19 | 2016-06-08 | Thk株式会社 | 運動案内装置、アクチュエータ |
CN204572781U (zh) * | 2015-03-20 | 2015-08-19 | 日本精工株式会社 | 直线导轨装置 |
CN104806632A (zh) * | 2015-04-30 | 2015-07-29 | 苏州世力源科技有限公司 | 一种提高组合式重型直线导轨可靠性的方法及其装置 |
TWI539091B (zh) | 2015-08-03 | 2016-06-21 | 上銀科技股份有限公司 | 便於組裝迴流管的線性滑軌 |
JP6804800B2 (ja) * | 2016-01-18 | 2020-12-23 | Thk株式会社 | 転がり案内装置 |
CN105570295A (zh) * | 2016-02-01 | 2016-05-11 | 嘉兴海菱达精密传动科技有限公司 | 一种滚动直线导轨副 |
JP6385384B2 (ja) * | 2016-04-11 | 2018-09-05 | Thk株式会社 | 転がり案内装置 |
CN205937472U (zh) * | 2016-06-28 | 2017-02-08 | 嘉兴海菱达精密传动科技有限公司 | 滚动直线导轨副 |
CN206694405U (zh) * | 2017-04-10 | 2017-12-01 | 英属开曼群岛商亚德客国际股份有限公司 | 线性滑轨的端盖与滑动模块 |
-
2019
- 2019-11-14 JP JP2020558338A patent/JP7474199B2/ja active Active
- 2019-11-14 CN CN201980078141.6A patent/CN113167322B/zh active Active
- 2019-11-14 US US17/297,161 patent/US11852192B2/en active Active
- 2019-11-14 DE DE112019005901.7T patent/DE112019005901T5/de active Pending
- 2019-11-14 KR KR1020217019451A patent/KR20210094028A/ko not_active Application Discontinuation
- 2019-11-14 WO PCT/JP2019/044721 patent/WO2020110754A1/ja active Application Filing
- 2019-11-20 TW TW108142173A patent/TWI813814B/zh active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004169830A (ja) * | 2002-11-20 | 2004-06-17 | Meiji Univ | 転がり機械要素 |
JP2006316886A (ja) * | 2005-05-12 | 2006-11-24 | Nsk Ltd | 直動案内装置 |
JP2008133837A (ja) * | 2006-11-27 | 2008-06-12 | Nsk Ltd | 直動案内装置 |
JP2008291932A (ja) * | 2007-05-25 | 2008-12-04 | Nippon Thompson Co Ltd | ローラ形式の直動案内ユニット |
Also Published As
Publication number | Publication date |
---|---|
CN113167322B (zh) | 2023-06-02 |
CN113167322A (zh) | 2021-07-23 |
KR20210094028A (ko) | 2021-07-28 |
US20220025927A1 (en) | 2022-01-27 |
TWI813814B (zh) | 2023-09-01 |
US11852192B2 (en) | 2023-12-26 |
DE112019005901T5 (de) | 2021-08-05 |
JP7474199B2 (ja) | 2024-04-24 |
JPWO2020110754A1 (ja) | 2021-10-14 |
TW202032032A (zh) | 2020-09-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1793135B1 (en) | Motion guide device | |
JP5408346B2 (ja) | 直動案内装置 | |
JP6323127B2 (ja) | 直動案内装置 | |
US20060034552A1 (en) | Linear guide apparatus | |
US7401978B2 (en) | Linear motion guiding apparatus | |
US6742408B2 (en) | Ball screw mechanism | |
WO2020110754A1 (ja) | 運動案内装置 | |
WO2018216519A1 (ja) | 複列転動体収容バンド及び運動案内装置 | |
JP4954065B2 (ja) | ボールねじ、運動案内装置 | |
US7465093B2 (en) | Linear guide apparatus | |
WO2021235075A1 (ja) | 運動案内装置 | |
JPWO2009011282A1 (ja) | 運動案内装置及びねじ装置 | |
CN1250434C (zh) | 线性导向装置以及滚子连接构件 | |
JP7433928B2 (ja) | 直動案内軸受 | |
US20010026651A1 (en) | Rolling element spacer in rolling guide device | |
JP3097525U (ja) | 転動体ねじ装置 | |
JP3219170B2 (ja) | 直動案内軸受 | |
WO2005038276A1 (ja) | リニアガイド装置 | |
US20070071371A1 (en) | Linear guide device | |
JP2006250166A (ja) | 直動案内装置 | |
JP2004245233A (ja) | リニアガイド用セパレータ | |
KR20060004526A (ko) | 볼 스플라인 | |
JPH04366017A (ja) | 直動形ガイド装置 | |
JPH0652085B2 (ja) | 直線摺動用ベアリング | |
JP2006300164A (ja) | リニアガイド装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 19890161 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2020558338 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 20217019451 Country of ref document: KR Kind code of ref document: A |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 19890161 Country of ref document: EP Kind code of ref document: A1 |