WO2014119266A1 - 運動案内装置 - Google Patents
運動案内装置 Download PDFInfo
- Publication number
- WO2014119266A1 WO2014119266A1 PCT/JP2014/000356 JP2014000356W WO2014119266A1 WO 2014119266 A1 WO2014119266 A1 WO 2014119266A1 JP 2014000356 W JP2014000356 W JP 2014000356W WO 2014119266 A1 WO2014119266 A1 WO 2014119266A1
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- WIPO (PCT)
- Prior art keywords
- rolling
- path
- rolling element
- roller
- unloaded
- Prior art date
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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
- 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
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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
- 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
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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
- F16C29/0633—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides
- F16C29/0635—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end
- F16C29/065—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end with rollers
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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
- F16C29/0633—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides
- F16C29/0652—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are at least partly defined by separate parts, e.g. covers attached to the legs of the main body of the U-shaped carriage
- F16C29/0666—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are at least partly defined by separate parts, e.g. covers attached to the legs of the main body of the U-shaped carriage with rollers
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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
- F16C29/0633—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides
- F16C29/0669—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the main body of the U-shaped carriage is an assembly of at least three major parts, e.g. an assembly of a top plate with two separate legs attached thereto in the form of bearing shoes
- F16C29/0673—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the main body of the U-shaped carriage is an assembly of at least three major parts, e.g. an assembly of a top plate with two separate legs attached thereto in the form of bearing shoes with rollers
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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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/34—Rollers; Needles
- F16C33/36—Rollers; Needles with bearing-surfaces other than cylindrical, e.g. tapered; with grooves in the bearing surfaces
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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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
- F16C33/6622—Details of supply and/or removal of the grease, e.g. purging grease
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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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
- F16C33/6629—Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements
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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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
- F16C33/6681—Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements
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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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
- F16C33/6685—Details of collecting or draining, e.g. returning the liquid to a sump
Definitions
- the present invention relates to a motion guide device.
- This type of motion guide device includes a track member attached to the fixed part and a moving member fixed to the movable part.
- the moving member is assembled to the track member so as to be linearly movable.
- a large number of rollers are interposed between the race member and the moving member so as to allow rolling motion.
- the moving member is provided with a circuit-like infinite circulation path through which the rollers circulate.
- the circuit-shaped infinite circulation path of the motion guide device is an unloaded rolling element rolling path parallel to the loaded rolling element rolling path between the rolling element rolling surface of the raceway member and the loaded rolling element rolling surface of the moving member, the load It is comprised by a pair of U-shaped direction change path which connects a rolling-element rolling path and an unloaded rolling-element rolling path (refer the following patent document 1).
- a large number of rollers are arranged and stored in the infinite circulation path.
- a large number of rollers are rotatably held by a roller retainer.
- the roller retainer includes a large number of spacers interposed between the front and rear rollers in the traveling direction, and a belt portion connecting the spacers.
- the reason why the spacers are interposed between the front and rear rollers in the traveling direction is to prevent the front and rear rollers from making sliding contact with each other.
- the assembly of the roller retainer can be facilitated by connecting a large number of spacers with the belt portions.
- the structure which prevented the skew of a roller by using this roller retainer was taken.
- a roller retainer belt guide groove for guiding the belt portion is provided in the no-load rolling element rolling path and the direction changing road, and the belt portion guides the roller in the no-load circulation path.
- the shape in the conventional no-load circulation path is a roller shape or a shape in which gaps are provided almost uniformly on the outer periphery of the cross-sectional shape including the belt portion.
- a lubricant such as grease or oil is filled, applied, or attached to the gap.
- the lubricant acts as a resistance and a load is applied to the roller retainer, which may increase the sliding resistance of the motion guide device itself.
- the lubricant is a viscous material, depending on the use environment, there is a possibility that the resistance may change depending on the temperature and the passing speed / acceleration.
- the present invention was made in view of the existence of the above-described problems of the prior art, and the purpose thereof is that a plurality of rolling elements that roll in the no-load circulation path are not affected by the lubricant,
- the object is to realize a motion guide device capable of smooth guide motion.
- the motion guide device includes a raceway member having a rolling element rolling surface extending in a longitudinal direction, a loaded rolling element rolling surface facing the rolling element rolling surface, and parallel to the loaded rolling element rolling surface.
- An unloaded rolling element rolling path that extends, a moving member having a pair of direction changing paths that connect the loaded rolling element rolling surface and the unloaded rolling element rolling path, the rolling element rolling surface of the track member, and the A plurality of rolling elements arranged in an endless circulation path including a loaded rolling element rolling path between the moving member and the loaded rolling element rolling surface, the unloaded rolling element rolling path, and the direction changing path.
- It is a motion guide device, and is a cross section including an axis of the rolling element, and when viewed in a cross section that cuts through the unloaded rolling element rolling path or the direction changing path, the unloaded rolling element rolling path or the
- the direction change path is the no-load rolling element rolling path or the direction change path.
- a posture support portion that supports the posture of the rolling element that runs, and a space portion that allows the lubricant present in the unloaded rolling element rolling path or the direction changing path to escape. It is characterized by.
- a motion guide device that can perform a smooth guide motion without a plurality of rolling elements rolling in the no-load circulation path being affected by the lubricant.
- FIG. 1 is a partial cross-sectional view showing a linear guide according to the present embodiment.
- FIG. 2 is a front view of a partial cross section of the linear guide according to the present embodiment.
- FIG. 3 is a cross-sectional view showing the direction change path according to the present embodiment.
- FIG. 4 is an enlarged cross-sectional view showing the configuration of the pipe member according to the present embodiment.
- FIG. 5 is a diagram showing a cross section taken along the line AA in FIG.
- FIG. 6A is a diagram illustrating a configuration of a direction change path according to the present embodiment.
- FIG. 6B is a diagram illustrating a configuration of an R piece, a configuration of an end plate, and a relationship between the R piece and the end plate according to the present embodiment.
- FIG. 1 is a partial cross-sectional view showing a linear guide according to the present embodiment.
- FIG. 2 is a front view of a partial cross section of the linear guide according to the present embodiment.
- FIG. 3 is
- FIG. 6C is an enlarged view of the direction change path according to the present embodiment.
- FIG. 7 is a diagram illustrating how the belt portion bends in the direction change path according to the present embodiment.
- FIG. 8 is a diagram illustrating a case where the present invention is applied to a total roller type linear guide.
- FIG. 9 is a diagram showing the internal shapes of the no-load roller rolling path and the direction changing path that can be applied to the motion guide device according to the first modification.
- FIG. 10 is a diagram showing internal shapes of a no-load roller rolling path and a direction changing path that can be applied to the motion guide apparatus according to the second modification.
- FIG. 11 is a diagram showing various modifications that the present invention can take.
- FIG. 1 is a partial cross-sectional view showing a linear guide 10 according to the present embodiment.
- FIG. 2 is a front view of a partial cross section of the linear guide 10 according to the present embodiment.
- FIG. 3 is sectional drawing which shows the direction change path 60 which concerns on this embodiment.
- FIG. 4 is a diagram illustrating a configuration of the pipe member 51 according to the present embodiment.
- FIG. 5 is a diagram showing a cross section taken along the line AA in FIG.
- the linear guide 10 is assembled so as to be linearly movable through a track rail 20 as a linearly extending track member and a plurality of rollers 40 as rolling elements. And a moving block 30 as a moving member.
- the track rail 20 is a member formed to be elongated in a substantially square cross section.
- a substantially V-shaped depression is formed on the left and right side surfaces of the track rail 20, and a pair of left and right projections 21 projecting in the width direction are formed on the upper part of the depression.
- Roller rolling surfaces 22 as rolling element rolling surfaces extending in the longitudinal direction of the track rail 20 are formed on the upper and lower surfaces sandwiching each protrusion 21. In this embodiment, two roller rolling surfaces 22 are formed on each protrusion 21, and a total of four roller rolling surfaces 22 are formed.
- the moving block 30 includes a moving block main body 31 and end plates 32 attached to both ends of the moving block main body 31 in the moving direction.
- the moving block main body 31 includes a loaded roller rolling surface 33 as a loaded rolling element rolling surface facing the roller rolling surface 22 of the track rail 20 and a no-load rolling roller arranged in parallel with the loaded roller rolling surface 33.
- a no-load roller rolling path 50 is formed as a moving body rolling path.
- the end plate 32 is a pair of lid members provided on the movable block main body 31.
- the end plate 32 is formed with a direction changing path 60 connected to the loaded roller rolling surface 33 and the no-load roller rolling path 50. Further, the end plate 32 is provided with a seal or the like (not shown) that prevents foreign matters such as dust from entering the moving block 30.
- the moving block 30 has a central portion 35 that faces the upper surface of the track rail 20 in a state where the track rail 20 is arranged on a horizontal plane, and extends downward from both the left and right sides of the central portion 35 and faces the left and right side surfaces of the track rail 20 And a pair of side wall portions 36.
- the entire moving block 30 is formed in a bowl shape.
- a load roller rolling path 70 is formed as a loaded rolling element rolling path extending linearly.
- the loaded roller rolling path 70 extends linearly in a direction parallel to the no-load roller rolling path 50.
- the end of the loaded roller rolling path 70 and the end of the unloaded roller rolling path 50 are connected by a pair of direction changing paths 60 formed in a U shape.
- the unloaded roller rolling path 50, the direction changing path 60, and the loaded roller rolling path 70 form a circuit-like infinite circulation path.
- the plurality of rollers 40 roll in the load roller rolling path 70 while receiving a load.
- the roller 40 rolled to one end of the loaded roller rolling path 70 passes through the U-shaped direction changing path 60 and then enters the unloaded roller rolling path 50.
- the roller 40 that has passed through the unloaded roller rolling path 50 passes through the opposite direction changing path 60 and then enters the loaded roller rolling path 70 again.
- the moving block body 31 has a through hole 37 parallel to the load roller rolling path 70, and a resin-molded hollow pipe member 51 is inserted into the through hole 37.
- the pipe member 51 has an outer peripheral side guide portion 52 connected to the outer peripheral side of the no-load roller rolling path 50 and an inner peripheral side guide portion 53 connected to the inner peripheral side of the roller circulation path. Further, a plurality of grooves are formed on the inner wall surface of the pipe member 51.
- the inner wall surface formed by the outer peripheral side guide portion 52 and the inner peripheral side guide portion 53 of the pipe member 51 is formed so that the diameter and the axial length of the roller 40 are accommodated.
- a side space portion 54 is formed on the inner wall surface, and can be applied to, for example, a roller retainer belt guide groove that guides the belt portion 82 of the roller retainer 80.
- a larger space is formed on the outer peripheral side than on the inner peripheral side with the roller axis interposed therebetween.
- the present invention is not limited to this, and a larger space may be formed on the inner peripheral side than on the outer peripheral side.
- a posture support portion 55 for supporting the posture of the roller 40 is formed on the pipe member 51 serving as a no-load roller rolling path constituting member.
- the posture support portion 55 includes two side surface side support portions 56 and 56 and two first peripheral surface side support portions 57 and 56 formed on the outer peripheral side of the no-load roller rolling path 50 according to the positions formed. 57 and one second peripheral surface side support portion 58 formed on the inner peripheral side of the no-load roller rolling path 50. These five posture support portions 55 are formed in a convex shape from the inner wall surface of the pipe member 51 toward the roller 40 that rolls on the no-load roller rolling path 50.
- the first circumferential surface side support portion 57 is formed at two locations.
- the present invention is not limited to this, and the second circumferential surface side support portion 58 may be formed at two locations. .
- the side surface side support parts 56 and 56 are formed in the inner peripheral side, it is not limited to this, You may form in the outer peripheral side.
- the side surface side support part 56 is a convex part formed along the rolling direction of the roller 40 on the inner wall surface of the pipe member 51, and is formed in a pair.
- Each of the side surface side support portions 56 is a cross section including the axis of the roller 40, and is formed toward sides facing each other in the axial direction of the roller 40 when viewed in a cross section through the unloaded roller rolling path 50. Is done.
- a roller retainer band guide groove formed in a concave shape is formed at a position in the direction in which the roller axis is located with respect to the roller facing surface of the side surface side support portion 56. The distance between the side support portions 56 and 56 is formed to be longer than the length of the roller 40 in the width direction.
- the first circumferential surface side support portion 57 is a convex portion formed along the rolling direction of the roller 40 on the outer circumferential side of the no-load roller rolling path 50, and is formed in a pair. Each of the peripheral surface side support portions 57 and 57 is formed to support a slight range on the end surface side of the roller 40.
- an outer peripheral side space portion 54 a that is recessed to the outer peripheral side with respect to the roller facing surface of the peripheral surface side support portions 57, 57 is formed between the respective peripheral surface side support portions 57, 57.
- the second peripheral surface side support portion 58 is a convex portion formed along the rolling direction of the roller 40 on the inner peripheral side of the no-load roller rolling path 50.
- the second peripheral surface side support portion 58 is formed so as to support a slight range at the center of the roller 40. Therefore, on both sides of the second peripheral surface side support portion 58, a pair of inner peripheral space portions 54 b and 54 b that are recessed to the inner peripheral side with respect to the roller facing surface of the second peripheral surface side support portion 58 are formed.
- the two first circumferential surface side support portions 57 and 57 and the second circumferential surface side support portion 58 are connected by a straight line, they are formed so as to look like a substantially triangular shape.
- the positional relationship between the first circumferential surface side support portions 57 and 57 and the second circumferential surface side support portion 58 is not limited to a substantially triangular shape, and the same effect can be obtained.
- the five posture support portions 55 (56, 56, 57, 57, 58) as described above are formed asymmetrically across the axis of the roller 40.
- the roller 40 that rolls is in contact with any of the posture support portions 55 (56, 57, 58) even when a force that is displaced in the axial direction and circumferential direction is applied during rolling. Since the roller 40 is returned to the posture position, the roller 40 can stably roll without skewing.
- the linear guide 10 includes a pair of side surface support portions 56, 56, a pair of first peripheral surface side support portions 57, 57, and one second peripheral surface side support portion 58.
- the roller 40 rolling on the no-load roller rolling path 50 is supported, and the roller retainer belt guide groove, the outer peripheral space portion 54a, and the pair of inner peripheral space portions 54b and 54b are provided around the roller 40.
- the lubricant is held in these sufficiently wide spaces 54, 54a, 54b. Therefore, there is an adverse effect caused by the lubricant in the prior art, such as the movement of the roller 40 being inhibited by the lubricant. I do not receive it. Therefore, according to the present embodiment, it is possible to provide the linear guide 10 that realizes a smooth guide motion.
- FIG. 6A is a diagram illustrating a configuration of the direction change path 60 according to the present embodiment.
- 6B is a diagram illustrating the configuration of the R piece 61, the configuration of the end plate 32, and the relationship between the R piece 61 and the end plate 32 according to the present embodiment.
- FIG. 6C is an enlarged view of the direction change path 60.
- the direction change path 60 has an inner peripheral side formed by an R piece 61 as a direction change portion, and an outer peripheral side formed by an end plate 32 as a lid member.
- the end plate 32 is formed in a semicircular shape centering on a predetermined point on the outer peripheral side of the direction change path 60, and a plurality of grooves are formed along this shape. Due to the steps generated by the plurality of grooves, the outer peripheral side of the direction change path 60 formed in the end plate 32 corresponds to the pair of first peripheral surface side support portions 57, 57 formed in the no-load roller rolling path 50. To be formed 57 ', 57'.
- the R piece 61 is a resin fitting member and is fitted into the fitting groove formed in the end plate 32 as shown in FIG. 6B. Further, the R piece 61 has a semicircular curved portion concentric with the arc on the outer peripheral side of the direction changing path 60, and a plurality of grooves are formed in the curved portion of the R piece 61. Due to the steps generated by the plurality of grooves, the R piece 61 has portions 56 ′ corresponding to the pair of side surface support portions 56, 56 formed in the unloaded roller rolling path 50 along the semicircular curved portion. A portion 58 ′ corresponding to 56 ′ and the second peripheral surface side support portion 58 is formed.
- the groove on the inner wall surface of the direction change path 60 formed by the end plate 32 and the R piece 61 has the same configuration as the groove formed on the inner wall surface of the pipe member 51. Therefore, the cross-sectional shape of the direction change path 60 formed by the end plate 32 and the R piece 61 is the same as the cross-sectional shape of the no-load roller rolling path 50 shown in FIG. That is, when the roller 40 rolls in an unloaded state (that is, rolls on the no-load roller rolling path 50 and the direction changing path 60), the roller 40 rolls in the same cross-sectional shape.
- the linear guide 10 includes portions 56 ′ and 56 ′ corresponding to the pair of side surface support portions 56 and 56, and portions 57 ′ corresponding to the pair of first circumferential surface side support portions 57 and 57. , 57 ′ and a portion 58 ′ corresponding to the second peripheral surface side support portion 58 support the roller 40 rolling on the direction change path 60, and a space corresponding to the roller retainer belt guide groove around the roller 40.
- 54 ′, a space 54a ′ corresponding to the outer peripheral space portion 54a, and spaces 54b ′ and 54b ′ corresponding to the pair of inner peripheral space portions 54b and 54b are not affected by the lubricant. It is possible to provide a linear guide 10 that realizes a smooth guide motion.
- the roller retainer 80 includes a plurality of spacers 81 interposed between the front and rear rollers 40 in the traveling direction, and a band portion 82 that connects the plurality of spacers 81. And have.
- the roller retainer 80 is formed by resin injection molding or the like.
- FIG. 7 is a figure which shows the bending method of the belt
- the spacer 81 is formed in a rectangular cross section. At both ends of the spacer 81 in the traveling direction, curved concave portions corresponding to the peripheral surface of the roller 40 are formed. The space between the rollers 40 is kept constant by the spacer 81, and stable rolling can be performed without the rollers 40 contacting each other.
- the band portion 82 is a connecting member that connects the plurality of spacers 81.
- the band portion 82 is disposed in one plane and protrudes on both sides of the end surface that intersects the axis of the roller 40.
- the belt part 82 has flexibility, and extends linearly in the linear load roller rolling path 70 and the linear unloaded roller rolling path 50. And in the U-shaped direction change path 60, it bends in a U-shape.
- the first inventor as another method for realizing a smooth rolling operation of the roller 40, secures a certain space around the roller 40, thereby sliding resistance when the roller 40 rolls.
- the no-load roller rolling path 50 has three posture support portions 55 on the peripheral surface side of the roller 40 and two on the end surface side of the roller 40. That is, a total of five posture support portions 55 are formed.
- the posture support portion 55 formed on the circumferential surface side of the roller 40 is formed at two locations as first circumferential surface side support portions 57 and 57 that support the circumferential surface side of the roller 40 in the outer circumferential side guide portion 52.
- the inner peripheral side guide portion 53 is formed at one place as the second peripheral surface side support portion 58 that supports the peripheral surface side of the roller 40.
- the posture support portions 55 formed on the end surface side of the roller 40 are formed at two positions on the left and right as the side surface support portions 56 and 56 in the inner peripheral side guide portion 53. And between each attitude
- the cross-sectional area is generally increased.
- the roller 40 is formed to have a surface length in the axial direction, and the width on the peripheral surface side is long.
- the three portions of the first peripheral surface side support portions 57 and 57 and the second peripheral surface side support portion 58 are provided on the peripheral surface side. Is formed. Further, since the curved stroke is longer on the outer surface side formed by the end plate 32 than on the inner surface side formed by the R piece 61, the first peripheral surface side support portions 57, 57 formed at two locations are on the outer peripheral side. It is formed on the guide portion 53 side.
- the sliding resistance of the roller 40 is related to the force of pulling the belt portion 82 of the roller retainer 80 and the force of rubbing the roller retainer belt guide groove. That is, when the sliding resistance of the roller 40 increases, the force with which the roller 40 pulls the belt portion 82 increases in the endless circulation path. It was also confirmed that the force for pulling the belt portion 82 of the roller retainer 80 and the force for rubbing the roller retainer belt guide groove appear when starting from a stopped state.
- the side space portion 54 formed as the roller retainer band guide groove is formed as a sufficiently wide space. Even if the roller retainer belt according to the present embodiment enters inside the virtual curve X drawn by the locus of the axis of the roller 40 based on the force, the roller retainer belt according to the present embodiment does not contact anywhere on the inner wall surface. Therefore, in the linear guide 10 according to the present embodiment, the sliding resistance of the roller 40 can be reduced. Further, according to the present embodiment, the roller retainer 80 in the endless circulation path is not affected by the bad influence of the lubricant, so that the smooth circulation operation of the roller 40 can be realized.
- the posture support part 55 is configured to support the roller 40 with a surface, it may be configured to support with a point. Since the space sectional area can be further increased as compared with the case of supporting by a surface, the influence of the lubricant can be further reduced, and the roller 40 can roll more smoothly.
- track rail 20 and the moving block 30 according to the present embodiment are formed linearly, they may be formed in a curved shape.
- the linear guide 10 using the retainer is illustrated and described.
- the present invention is similarly applied to a total roller type linear guide without a retainer. Can be applied. That is, even if it is an unloaded roller rolling path without a roller retainer belt guide groove in the side space 54 or a total roller type linear guide having a direction changing path, it is not affected by the sliding resistance due to the lubricant. A linear guide that can realize a smooth guide movement can be obtained.
- the cross-sectional shapes of the track rail 20 and the moving block 30 can be changed as appropriate.
- the number of strips of the infinite circulation path of the roller 40 can be changed as appropriate.
- the roller 40 that is a rolling element is described by exemplifying a case where the length dimension L of the roller width has a relationship of L / D> 1 with respect to the length dimension D of the roller diameter. went.
- the posture support portion that supports the posture of the rolling element that rolls on the no-load rolling element rolling path or the direction changing path is formed asymmetrically across the rolling element. It was related with the motion guidance apparatus characterized by being performed. With this configuration, the motion guide device according to the embodiment described above realizes a smooth guide motion without the influence of the lubricant on the plurality of rolling elements that roll in the no-load circulation path. It was. However, the motion guide device of the present invention can adopt a configuration that can realize a smoother guide motion by further stabilizing the rolling motion of the plurality of rolling elements. Therefore, a configuration that can further stabilize the rolling operation of a plurality of rolling elements will be described with reference to FIGS.
- FIG. 9 is a diagram showing the internal shapes of the no-load roller rolling path 50 and the direction changing path 60 that can be applied to the motion guide apparatus according to the first modification.
- the drum-shaped roller 140 having a drum shape is used as the rolling element used in the motion guide apparatus shown in FIG.
- the upper side of the paper is the outer peripheral side of the no-load roller rolling path 50 and the direction changing path 60
- the lower side of the page is the inner peripheral side of the no-load roller rolling path 50 and the direction changing path 60. ing.
- the posture support portion 155 that supports the drum roller 140 is formed in a shape along the outer shape of the drum roller 140.
- the side surface support portion 156 that supports the side surface side of the drum roller 140 is formed so as to cover a wider area on the roller side surface than in the case of the above-described embodiment.
- the drum roller 140 is configured to support the side surface in a more stable state.
- the sides opposite to each other in the axial direction of the drum roller 140 (that is, the side surfaces of the rollers) are provided with a pair of side surface side support portions 156 and 156 formed toward the sides.
- the motion guide device according to the first modification can realize a stable guide motion.
- the posture support portion 155 (the first peripheral surface side support portion 157 on the outer peripheral side, along the outer shape of the drum roller 140 for each side, It is preferable to provide a second peripheral surface side support portion 158) on the inner peripheral side, and further, for the first peripheral surface side support portion 157 on the outer peripheral side and the second peripheral surface side support portion 158 on the inner peripheral side, It is preferable to provide a plurality of spaces on the side, and to provide a space (an outer circumferential space portion 154a on the outer circumferential side and an inner circumferential space portion 154b on the inner circumferential side) between the plurality of support portions.
- the drum roller 140 By forming the first peripheral surface side support portion 157 and the second peripheral surface side support portion 158 along the outer shape of the hourglass roller 140, the drum roller 140 can be stably supported. Further, by providing the outer peripheral space portion 154a and the inner peripheral space portion 154b having a sufficiently large cross-sectional area, a lubricant such as grease can be suitably held, and the rolling operation of the drum roller 140 can be hindered. No.
- the inventors have confirmed that when the inner circumferential space is narrower than the outer circumferential space, a phenomenon in which viscous resistance increases during lubrication of the lubricant occurs. Therefore, by configuring the inner circumferential space portion to have a wide cross-sectional area, an effect of preventing an increase in the viscous resistance of the lubricant that has entered the space portion can be obtained. By satisfying such a configuration condition, the motion guide device according to the first modification can realize a stable guide motion.
- the motion guide device according to the first modification described above is a cross section including the axis of the rolling element, and when viewed in a cross section that cuts through the no-load rolling element rolling path or the direction changing path, the posture support part is A plurality of rolling elements are formed on the outer peripheral side and the inner peripheral side, respectively, but various modifications can be made within a range including such a configuration condition.
- FIG. 10 is a diagram showing the internal shapes of the no-load roller rolling path 50 and the direction changing path 60 that can be applied to the motion guide apparatus according to the second modification.
- the side support portion 256 that supports the side face of the drum roller 240 has a wide area on the roller side face.
- the drum roller 240 is configured to support the side surface in a more stable state.
- the outer peripheral side first peripheral surface side support portion 257 and the inner peripheral side second peripheral surface side support portion 258 are formed along the outer shape of the hourglass roller 240, thereby stabilizing the drum roller 240.
- the outer peripheral space portion 254a and the inner peripheral space portion 254b having a sufficiently large cross-sectional area, a lubricant such as grease is suitably held, and the drum roller 240 Smooth rolling motion is realized.
- the inner circumferential space 254b is configured to have a wider cross-sectional area than the outer circumferential space 254a.
- the motion guide device includes the roller retainer 280.
- the roller guide The retainer 280 performs an operation of deforming to the inner peripheral side in order to prevent the drum roller 240 from being pushed out to the outer peripheral side. That is, in the inside of the direction change path 60, the roller retainer 280 moves to the inner peripheral side and deforms into the inner peripheral side space portion 254b.
- the size of the inner peripheral side space portion 254b is the roller retainer. Since it is designed in consideration of the space reduction due to deformation of 280, the viscous resistance of the lubricant is always maintained in a suitable state.
- the outer peripheral side first peripheral surface side support portion 357 and the inner peripheral side second peripheral surface side support portion 358 are configured to change the roller 340 according to the use conditions of the motion guide device. It is also possible to have an axially symmetrical shape with the sandwiched, and it is also possible to make the size of the outer peripheral side space part 354a and the inner peripheral side space part 354b the same. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.
- the motion guide apparatus includes seismic isolation devices, system kitchens, and various game machines from machine tools, semiconductor / liquid crystal manufacturing apparatuses (for example, mounting machines), and industrial machines such as robots. It can be incorporated as a component part in a wide range of fields, including consumer products such as medical machinery, food machinery, and transport equipment.
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Abstract
Description
Claims (7)
- 長手方向に伸びる転動体転走面を有する軌道部材と、
前記転動体転走面に対向する負荷転動体転走面、前記負荷転動体転走面と平行に伸びる無負荷転動体転走路、及び前記負荷転動体転走面と前記無負荷転動体転走路とを接続する一対の方向転換路を有する移動部材と、
前記軌道部材の転動体転走面と前記移動部材の前記負荷転動体転走面との間の負荷転動体転走路、前記無負荷転動体転走路、及び前記方向転換路を含む無限循環路に配列される複数の転動体と、
を備える運動案内装置において、
前記転動体の軸線を含む断面であって、前記無負荷転動体転走路又は前記方向転換路を縦断する断面で見たときに、
前記無負荷転動体転走路又は前記方向転換路は、
前記無負荷転動体転走路又は前記方向転換路を転走する前記転動体の姿勢を支持する姿勢支持部と、
前記前記無負荷転動体転走路又は前記方向転換路の内部に存在する潤滑剤を逃がす空間部と、
を有して構成されていることを特徴とする運動案内装置。 - 請求項1に記載の運動案内装置において、
前記転動体の軸線を含む断面であって、前記無負荷転動体転走路又は前記方向転換路を縦断する断面で見たときに、
前記無負荷転動体転走路又は前記方向転換路を転走する前記転動体の姿勢を支持する姿勢支持部が、前記転動体を挟んで非対称に形成されることを特徴とする運動案内装置。 - 請求項2に記載の運動案内装置において、
前記転動体の軸線方向で互いに対向する辺には、当該辺に向けて形成される一対の側面側支持部と、一対の側面空間部とが形成されることを特徴とする運動案内装置。 - 請求項2又は3に記載の運動案内装置において、
前記姿勢支持部は、
前記無負荷転動体転走路又は前記方向転換路の外周側に形成される一対の第一周面側支持部と、前記無負荷転動体転走路又は前記方向転換路の内周側に形成される1つの第二周面側支持部を有するか、もしくは、
前記無負荷転動体転走路又は前記方向転換路の外周側に形成される1つの第一周面側支持部と、前記無負荷転動体転走路又は前記方向転換路の内周側に形成される一対の第二周面側支持部を有することを特徴とする運動案内装置。 - 請求項1に記載の運動案内装置において、
前記姿勢支持部は、前記転動体の外形に沿った形状として形成され、
前記転動体の軸線を含む断面であって、前記無負荷転動体転走路又は前記方向転換路を縦断する断面で見たときに、
前記姿勢支持部は、前記転動体の外周側と内周側にそれぞれ複数形成されることを特徴とする運動案内装置。 - 請求項5に記載の運動案内装置において、
前記転動体の軸線を含む断面であって、前記無負荷転動体転走路又は前記方向転換路を縦断する断面で見たときに、
前記空間部は、前記転動体の外周側と内周側にそれぞれ形成されるとともに、外周側に形成される空間部の空間面積をA、内周側に形成される空間部の空間面積をBとしたときに、A≦Bなる不等式が成り立つように形成されることを特徴とする運動案内装置。 - 請求項5又は6に記載の運動案内装置において、
前記転動体が、鼓形状をしていることを特徴とする運動案内装置。
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KR1020157020485A KR101551615B1 (ko) | 2013-01-31 | 2014-01-24 | 운동 안내 장치 |
US14/764,636 US9394940B2 (en) | 2013-01-31 | 2014-01-24 | Motion guide device |
CN201480006580.3A CN104956103B (zh) | 2013-01-31 | 2014-01-24 | 运动引导装置 |
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JP6436949B2 (ja) * | 2016-09-02 | 2018-12-12 | 日本ベアリング株式会社 | 直動装置 |
TWI668378B (zh) * | 2018-04-23 | 2019-08-11 | 直得科技股份有限公司 | 微型線性滑軌及其滑座 |
TWI710718B (zh) * | 2019-07-12 | 2020-11-21 | 直得科技股份有限公司 | 具儲油功能的滾子式滑軌及其儲油配件 |
US11067123B2 (en) * | 2019-12-19 | 2021-07-20 | Nippon Thompson Co., Ltd. | Linear motion guide unit |
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CN104956103A (zh) | 2015-09-30 |
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