JP4638855B2 - Exercise guidance device - Google Patents

Description

  The present invention relates to a motion guide device such as a linear guide or a spline for guiding a moving body such as a table to move linearly or curvedly.

  As a mechanical element for guiding linear and curved movements of a moving body such as a table, a motion guide device having rolling elements such as balls and rollers in the guide portion can provide light movements. It is used in various fields such as machinery, semiconductor / liquid crystal manufacturing equipment, and medical equipment.

  This motion guide device has a track rail attached to a base and a moving block attached to the track rail so as to be capable of relative motion and to which a moving body is attached. A rolling element rolling part extending along the longitudinal direction is formed on the track rail. The moving block is provided with a rolling element circulation path that circulates the rolling element while forming a loaded rolling element rolling part that faces the rolling element rolling part. A rolling element is interposed between the ball rolling part of the track rail and the load ball rolling groove of the moving block. When the moving block moves linearly relative to the track rail, the rolling elements interposed between the track rail and the moving block roll.

  When using such a rolling motion guide device, it is necessary to provide good lubrication, that is, to form an oil film between the rolling element and the rolling surface to prevent direct contact between metal and metal. . This is because, when used without lubrication, wear of the rolling elements and the rolling surface increases, resulting in an early life.

  The lubrication method of the motion guide device includes a manual lubrication method using a grease gun and a manual pump, and a forced lubrication method using an automatic pump. For example, in the manual lubrication method shown in FIG. 16, grease is periodically lubricated from the nipple 66 to the motion guide device using the grease gun 65. The end plate 64 attached to the end face of the moving block is provided with a lubricant supply path that leads from the nipple to the rolling element circulation path (see, for example, Patent Document 1). As shown in FIG. 17, the forced lubrication method is a lubrication method in which a certain amount of lubricating oil is forcibly periodically lubricated by an automatic pump. Used mainly for lubrication with lubricating oil. Also in this forced oil supply method, the lubricant oil is supplied to the rolling element circulation path via the lubricant supply path of the end plate 64, as in the manual lubrication method.

Japanese Patent Laying-Open No. 2005-083500 (see paragraph 0014)

  However, in recent years, the amount of lubricant used has been decreasing in consideration of environmental impact. Even if a small amount of lubricant is supplied to the rolling element circulation path, the lubricant is not vigorously discharged from the outlet of the lubricant supply path. If it becomes like this, it will become difficult for a lubricant to reach a rolling element only by the circumference | surroundings of a rolling element circulation path getting wet.

  Then, an object of this invention is to provide the exercise | movement guide apparatus which can take out a lubricant vigorously in the rolling element circulation path | route from the discharge port of a lubricant supply path | route.

  The present invention will be described below. In addition, in order to make an understanding of this invention easy, the reference number of an accompanying drawing is attached in parenthesis writing, However, This invention is not limited to the form of illustration.

In order to solve the above-mentioned problem, the invention described in claim 1 includes a raceway member (1) in which a rolling element rolling part (1a) extending along a longitudinal direction is formed, and the rolling element rolling part (1a). A moving block having a rolling element circulation path including a rolling element return passage (5d) extending substantially parallel to the load rolling element rolling section (5c). (4) and a plurality of rolling elements (3) arranged in the rolling element circulation path, in the motion guide device, the moving block (4) supplies a lubricant to the rolling element circulation path. The lubricant supply path (33, 46) is provided, and the lubricant supply path (33, 46) has a cross-sectional area at the discharge port (30) connected to the rolling element circulation path. The moving block (4) is smaller than the area , and the moving block (4) includes a moving block body (5) having the rolling element rolling part (5c) and the rolling element return passage (5d), and a front A lid member that is attached to the end face of the moving block body (5) in the moving direction and that forms a direction changing path (16) that connects the load rolling element rolling section (5c) and the rolling element return path (5d). (6), and the lid member (6) has a first lubricant supply groove (22) for supplying a lubricant to the rolling element circulation path, and the first lubrication The lubricant supply groove (22) is a motion guide device in which a second lubricant supply groove (23) having a smaller cross-sectional area than the first lubricant supply groove (22) is dug down .

  According to a second aspect of the present invention, in the motion guide apparatus according to the first aspect, the lubricant supply path (33, 46) has a portion whose cross-sectional area gradually decreases toward the discharge port (30). Or having a reduced cross-sectional area at the outlet (30).

According to a third aspect of the present invention, in the motion guide apparatus according to the first or second aspect , the rolling element (3) is rotatably held in series by a belt-like retainer band (8), and the lid member (6 ) In the direction change path (16) is formed with a retainer guide part (35) for guiding the end part (8b) in the width direction of the retainer band (8), and the lubricant supply path (33) The discharge port (30) is connected to the retainer guide part (35) of the direction change path (16).

  According to the invention described in claim 1 or 2, since the cross-sectional area at the discharge port of the lubricant supply path is smaller than the cross-sectional area of the other part, as if the tip of the hose is squeezed, the water comes out vigorously, Lubricant can be ejected vigorously from the outlet.

According to the invention described in claim 3 , since the outlet of the lubricant supply path is provided in the retainer guide portion of the direction change path, the outlet is not provided on the contact surface with the rolling element of the direction change path. . Therefore, it does not prevent the rolling element from moving due to the step of the discharge port. And even if it provides a discharge port in the retainer guide part away from the rolling element, the lubricant can be delivered from the discharge port, so that the lubricant can reach the rolling element.

  FIG.1 and FIG.2 shows the exercise | movement guide apparatus in 1st embodiment of this invention. 1 shows a perspective view of the motion guide device, FIG. 2 shows a cross-sectional view of the motion guide device, and FIG. 3 shows a cross-sectional view of a ball circulation path of the motion guide device. The motion guide device of this embodiment is called a linear guide, and guides a moving body such as a table to reciprocate linearly with respect to a base. A plurality of balls are interposed as rolling elements in the guide portion.

  A track rail 1 as a track member is attached to the base. The track rail 1 is provided with a mounting hole 2 for fixing the track rail 1 to the base by a coupling means such as a bolt. The track rail 1 has a substantially quadrangular cross section and is elongated and extends linearly. On the left and right side surfaces of the track rail 1, for example, two ball rolling grooves 1a extending along the longitudinal direction are formed as rolling element rolling portions. The cross-sectional shape of the ball rolling groove 1a is a circular arch groove shape composed of a single arc or a Gothic arch groove shape composed of two arcs. The number of strips of the ball rolling groove 1a and the contact angle between the ball rolling groove and the ball are variously set according to the load load of the motion guide device. Since the ball 3 rolls, the ball rolling groove 1a is processed so as to have a small surface roughness and a high strength.

  As shown in FIG. 2, a moving block 4 is assembled to the track rail 1 via a plurality of balls 3 so as to be capable of relative movement. The moving block 4 includes a metal moving block main body 5 and a pair of resin end plates 6 provided at both ends of the moving block 4 in the moving direction. The moving block main body 5 is formed in a bowl shape as a whole, and hangs downward from the center portion 5a facing the upper surface of the track rail 1 and both ends in the width direction of the center portion 5a. And opposite side wall portions 5b. Two load ball rolling grooves 5 c are formed on the inner surfaces of the left and right side wall portions 5 b of the moving block body 5 as load rolling element rolling grooves facing the ball rolling grooves 1 a of the track rail 1. . Since the plurality of balls 3 also roll on the loaded ball rolling groove 5c, the loaded ball rolling groove 5c is processed so that the surface roughness is small and the strength is increased.

  As shown in FIG. 1, the plurality of balls 3 are connected in series by a retainer band 8 for each ball circulation path. A plurality of cylindrical spacers 8 a are interposed between the plurality of balls 3. The side surfaces of the plurality of spacers 8a are coupled by a pair of strip-shaped coupling portions 8b. A pocket for holding the ball 3 is formed in the retainer band 8 by the band-shaped connecting portion 8b and the plurality of spacers 8a. As shown in FIG. 2, the connecting portion 8 b protrudes outside the ball 3 when viewed from the traveling direction of the ball 3. On both sides of the load ball rolling groove 5c of the moving block body 5, guide grooves for guiding the connecting portion 8b protruding from the ball 3 are processed. The guide groove 10 is processed into a resin molded body 11 molded integrally with the moving block main body. The guide groove 10 prevents the ball 3 from dropping from the loaded ball rolling groove 5 c of the moving block 4 when the moving block 4 is removed from the track rail 1.

  As shown in FIG. 2, the left and right side wall portions 5b of the moving block body 5 are provided with ball return passages 5d extending in parallel with the load ball rolling grooves 5c as rolling element return passages. The same number of ball return passages 5d as the loaded ball rolling grooves 5c are provided. Since the diameter of the ball return passage 5d is larger than the diameter of the ball 3, the ball 3 does not receive a load in the ball return passage 5d. The ball 3 moves in the ball return passage 5d while being pushed by the succeeding ball 3 or being pulled by the front ball 3 through the retainer band 8. The ball return passage 5d is formed by integrally molding the resin molded body 13 in the through hole 12 opened in the moving block body 5. A guide groove 14 for guiding the connecting portion 8b of the retainer band 8 is also machined in the ball return passage 5d.

  End plates 6 are attached to both ends of the moving block body 5 in the moving direction as lid members. As shown in FIG. 3, the end plate 6 is formed with a U-shaped direction change path 16 that connects the loaded ball rolling groove 5c and the ball return path 5d. More specifically, the end plate 6 is formed with the outer peripheral side of the direction change path 16. On the end face of the moving block main body 5, an R piece portion 17 constituting the inner peripheral side of the direction changing path 16 is integrally injection-molded. The direction change path 16 is formed by combining the end plate 6 and the R piece portion 17.

  A linearly extending load ball rolling groove 5c, a ball return passage 5d extending parallel to the load ball rolling groove 5c, and a U-shaped direction change path 16 connecting the load ball rolling groove 5c and the ball return passage 5d. Thus, a circuit-like ball circulation path is formed. A plurality of balls 3 held by the retainer band 8 are accommodated in this ball circulation path. When the moving block 4 is moved relative to the track rail 1, the plurality of balls 3 rolls between the ball rolling groove 1 a of the track rail 1 and the load ball rolling groove 5 c of the moving block 4. Roll and exercise on the track. The ball 3 that has rolled to one end of the loaded ball rolling groove 5c of the moving block 4 is lifted up by a lifting portion provided on the end plate 6, and after passing through a U-shaped direction change path 16, the ball return path Enter 5d. After passing through the ball return path 5d, the ball passes through the opposite direction changing path 16 and then enters the loaded ball rolling path again. A total of four circuit-like ball circulation paths are provided independently.

  FIG. 4 shows a plan view of the end plate 6, and FIG. 5 shows an enlarged view of a portion V in FIG. 4. The end plate 6 is provided with a lubricant supply hole 21 passing through the end plate 6 in the moving direction of the moving block 4. The lubricant supply hole 21 is processed with a screw hole for attaching a nipple (see FIG. 1). A lubricant is supplied to the lubricant supply hole 21 from the outside of the end plate 6. A first lubricant supply groove 22 whose one end is connected to the lubricant supply hole 21 is dug in the contact surface 6 a of the end plate 6 that contacts the end surface of the moving block body 5. The first lubricant supply groove 22 is symmetrical with respect to the center line of the end plate 6 and extends from the lubricant supply hole 21 in the left-right direction. Then, it extends downward toward the direction change path 16 provided on the left and right side wall portions 6b of the end plate 6, branches into two branches at the middle portion of the upper and lower two direction change paths 16, and finally changes the direction of the upper and lower two lines. Connected to the path 16.

  The lubricant is discharged into the direction change path 16 from the discharge port 30 which is a connection portion between the first lubricant supply groove 22 and the direction change path 16. The first lubricant supply groove 22 gradually decreases in width toward a portion bifurcated from the lubricant supply hole 21, and becomes constant after bifurcation. A lubricant supply path for supplying a lubricant to the direction change path 16 is formed between the end face of the moving block body 5 and the end plate 6 in which the first lubricant supply groove 22 is formed. As will be described later, grease is supplied to the lubricant supply path as a lubricant. As the width of the first lubricant supply groove 22 becomes narrower, the cross-sectional area of the lubricant supply path gradually decreases toward the portion branched from the lubricant supply hole 21 into two branches.

  A second lubricant supply groove 23 having a smaller cross-sectional area than the first lubricant supply groove 22 is dug down on the bottom surface of the first lubricant supply groove 22. Similarly to the first lubricant supply groove 22, the second lubricant supply groove 23 is symmetrical with respect to the center line of the end plate 6, and extends from the lubricant supply hole 21 in the left-right direction. And it extends downward toward the direction change path 16 provided in each of the left and right side wall portions 6b of the end plate 6, branches into two branches at the middle part of the upper and lower two direction change paths 16, and its end is in the direction of the upper and lower two stripes. Connected to the conversion path 16. The path length of the second lubricant supply groove 23 is equal to the path length of the first lubricant supply groove 22.

  In FIG. 5, the second lubricant supply groove 23 is indicated by oblique lines. The lubricant is discharged into the direction change path 16 from the discharge port 30 which is a connection portion between the second lubricant supply groove 23 and the direction change path 16. The second lubricant supply groove 23 gradually decreases in width toward a portion branched from the lubricant supply hole 21 into a bifurcated portion, and becomes a constant width after bifurcating. As will be described later, when lubricating oil is used as a lubricant, an attachment is detachably embedded in the first lubricant supply groove 22. A lubricant supply path for supplying lubricant to the direction change path 16 is formed between the attachment and the second lubricant supply groove 23. As the width of the second lubricant supply groove 23 becomes narrower, the cross-sectional area of this lubricant supply path gradually decreases toward the portion branched from the lubricant supply hole 21 into two branches.

  FIG. 6 shows another example of the second lubricant supply groove 23. In this example, the second lubricant supply groove 23 has a certain width after branching, but the cross-sectional area is narrowed at the outlet 30 of the second lubricant supply groove 23. The second lubricant supply groove 23 before branching may have a constant width or may gradually narrow toward the branching position.

  As shown in FIG. 4, a direction change path 16 is formed in the end plate 6. In the direction change path 16 of the end plate 6, a retainer guide portion 35 that guides the outer peripheral side of the connecting portion 8 b (the end portion in the width direction of the retainer band 8) of the retainer band 8 is formed. A retainer guide portion that guides the inner peripheral side of the connecting portion 8b of the retainer band 8 is also formed in the R piece portion. When the end plate 6 and the R piece portion 17 (see FIG. 3) are combined, a retainer guide groove is formed along the direction change path 16. The discharge ports 30 of the first and second lubricant supply grooves 22 and 23 are connected to the retainer guide portion 35 of the end plate 6. More precisely, the discharge port 30 is provided slightly on the inner peripheral side with respect to the connecting portion 8 b of the retainer band 8 guided by the retainer guide portion 35.

  FIG. 7 shows the ball 3 and the retainer band 8 moving along the direction change path 16 of the end plate 6. When the ball 3 moves along the semicircular direction change path 16, the ball 3 moves while contacting the outer peripheral side of the direction change path 16 by centrifugal force. Further, since the connecting portion 8 b of the retainer band 8 is also bent in the retainer guide portion 35 of the direction change path 16, it moves along the outer peripheral side of the retainer guide portion 35. According to this embodiment, since the discharge port 30 is provided in the retainer guide portion 35, when the ball 3 moves while contacting the outer peripheral side of the direction change path 16, the movement of the ball 3 is hindered by the step of the discharge port 30. It is never done. Moreover, since the discharge port 30 is provided slightly on the inner peripheral side than the connecting portion 8b of the retainer band 8 (see FIG. 4), the connecting portion 8b of the retainer band 8 moves while contacting the outer peripheral side of the retainer guide portion 35. When doing so, the connecting portion 8 b is not caught by the step of the discharge port 30.

  Since the end plate 6 has a complicated shape, it is conventionally manufactured by injection molding of a resin. Since the first and second lubricant supply grooves 22 and 23 are originally formed in the end plate 6 which is injection-molded, the manufacture thereof is easy. 4 is a through hole for attaching the end plate 6 to the moving block body 5.

  FIG. 8 shows an attachment 26 fitted in the first lubricant supply groove 22. The attachment 26 is made of an elastic body made of rubber or resin (preferably soft plastic) that is softer than the end plate 6. The attachment 26 is manufactured by punching a sheet-like material with a press or cutting it with a water jet cutter or the like. The planar shape of the attachment 26 is the same as the planar shape of the first lubricant supply groove 22. Both the front surface side and the back surface side of the attachment 26 are formed in a plane.

  FIG. 9 shows an attachment 29 that is further fitted into the first lubricant supply groove 22. As shown in FIG. 4, the portion 27 where the direction change path 16 of the contact surface 6a of the end plate 6 of this embodiment is formed has a step, which is one step lower than the other portion 28 (FIG. 11). reference). An attachment 29 is provided in order to fill the level difference in the part lowered by one level. The planar shape of the attachment 29 is the same as the planar shape of the first lubricant supply groove 22 of the raised portion 28 of the end plate 6. Both the front surface side and the back surface side of the attachment 29 are formed in a plane.

  In addition, when there is no level | step difference in the end surface of the end plate 6, the attachment 29 is unnecessary. Further, in this embodiment, two types of separate attachments 26 and 29 are stacked, but two types of attachments 26 and 29 may be integrated.

  10 and 11 show a state in which the attachments 26 and 29 are embedded in the first lubricant supply groove 22 of the end plate 6. FIG. 10 shows a state in which the attachment is embedded only in the right side of the first lubricant supply groove 22 of the end plate 6. Actually, attachments 26 and 29 are embedded in both the right and left sides of the first lubricant supply groove 22. When the attachment is buried in the first lubricant supply groove 22, the entire cross section of the first lubricant supply groove 22 is closed. On the other hand, even if the attachment is filled in the first lubricant supply groove 22, the second lubricant supply groove 23 is not blocked. The attachments 26 and 29 embedded in the first lubricant supply groove 22 are sandwiched between the bottom surface of the first lubricant supply groove 22 and the end surface of the moving block body 5. The attachments 26 and 29 have an allowance, and the thicknesses of the attachments 26 and 29 are smaller than the gap between the bottom surface of the first lubricant supply groove 22 and the end surface of the moving block body 5. Attachments 26 and 29 made of an elastic body are in close contact with the bottom surface 31 (see FIG. 12) of the first lubricant supply groove 22, and the second lubricant supply groove 23 is sealed.

  As shown in FIGS. 11 and 12, two rib portions 32 extending along the second lubricant supply groove 23 may be provided on both sides of the second lubricant supply groove 23. The rib portion 32 protrudes from the bottom surface 31 of the first lubricant supply groove 22. By providing the rib portion 32 in this manner, the attachment 26 can be deformed without providing a tightening margin for the attachment 26. Since the amount of deformation of the attachment 26 can be increased, the sealing performance of the second lubricant supply groove 23 can be further improved. Further, if the rib portion 32 is not provided, the attachment 26 may be deformed to fill the second lubricant supply groove 23. By providing the rib portion 32, the attachment 26 can be prevented from narrowing the second lubricant supply groove 23. Therefore, the second lubricant supply groove 23 having a constant cross-sectional area can be reliably obtained.

  There are two types of lubricants: grease (lithium grease, urea grease, etc.) and lubricating oil (sliding surface oil or turbine oil, ISOVG 32-68, etc.). Since these have conflicting characteristics, when using grease as a lubricant, the cross-sectional area of the lubricant supply path must be widened, while when using lubricating oil as the lubricant, the cross-sectional area of the lubricant supply path must be narrowed. There is. Grease is gel and highly viscous. Therefore, in order to supply grease at a low pressure, it is necessary to reduce the resistance of the lubricant supply path. In order to reduce the resistance, it is only necessary to increase the cross-sectional area of the lubricant supply path and shorten the length of the lubricant supply path. On the other hand, the lubricating oil is liquid, has a low viscosity, and flows smoothly through the lubricant supply path. If a small amount of lubricating oil is passed through the large-volume lubricant supply path for grease, the lubricant supply path will not be filled with the lubricating oil and pressure will not be applied, so supply lubricating oil to all rolling element circulation paths It becomes difficult to do. Therefore, in order to supply the lubricating oil to all the rolling element circulation paths, it is necessary to reduce the volume of the lubricant supply path. For this purpose, it is only necessary to reduce the cross-sectional area of the lubricant supply path and shorten the length of the lubricant supply path.

  In other words, when supplying grease as the lubricant, the cross-sectional area of the lubricant supply path may be increased and the lubricant supply path may be shortened. On the other hand, when supplying lubricant as the lubricant, What is necessary is just to make a cross-sectional area small and a lubricant supply path short.

  A first lubricant supply groove 22 is dug in the end plate 6 to provide a wide cross-sectional lubricant supply path for grease. When the first lubricant supply groove 22 is used as a grease supply path for grease, the attachments 26 and 29 are not embedded in the first lubricant supply groove 22. Since the second lubricant supply groove 23 is dug in the first lubricant supply groove 22, the second lubricant supply groove 23 is also used as a lubricant supply path for grease.

  When lubricating oil is used as the lubricant, the attachments 26 and 29 are embedded in the first lubricant supply groove 22 as shown in FIG. When the first lubricant supply groove 22 is closed by the attachments 26 and 29, only the second lubricant supply groove 23 remains as the lubricant supply path. The lubricant supply path for the lubricating oil is formed between the second lubricant supply groove 23 and the attachments 26 and 29. Since the lubricating oil is supplied to the lubricant supply path with pressure by the pump, it is likely to leak. Since the attachments 26 and 29 improve the sealing performance of the lubricant supply path, it is possible to prevent the lubricating oil from leaking from the lubricant supply path.

  As shown in FIGS. 5 and 6, secondly, does the lubricant supply path for the lubricant formed by the lubricant supply groove 23 have a portion whose cross-sectional area gradually decreases toward the discharge port 30? Alternatively, the cross-sectional area is reduced at the discharge port 30. When lubricating oil is supplied to the lubricant supply path, if the tip of the hose is squeezed, water will come out vigorously, and the flow rate of the lubricating oil at the outlet 30 will rise and the lubricating oil will come out from the outlet 30 vigorously. Therefore, the lubricating oil can be applied not only to the retainer band 8 but also to the ball 3.

  As shown in FIG. 4, in the present embodiment, the grease supply path for grease formed by the first lubricant supply groove 22 also has a portion whose sectional area gradually decreases toward the discharge port 30. . Therefore, the flow rate of grease at the discharge port 30 can be increased. However, in the case of grease, it is not necessary to increase the flow velocity at the outlet as in the case of lubricating oil. This is because grease has a high viscosity, and even if it is intermittently supplied to the lubricant supply path, the grease supply path for grease is always filled with grease. When grease is supplied to the grease supply path for grease, the grease gradually comes out from the discharge port 30. The grease discharged into the direction change path 16 reaches the balls by the circulation of the balls 3. In order to reduce the resistance when supplying highly viscous grease to the lubricant supply path, the cross-sectional area of the grease supply path for grease may be constant.

  FIG. 14 shows a lubricant supply path for lubricating oil. Attachments 26 and 29 embedded in the first lubricant supply groove 22 are interposed between the end plate 6 and the end surface of the moving block body 5. Lubricating oil supplied from the nipple for supplying lubricating oil of the end plate 6 is formed between the attachments 26 and 29 and the second lubricant supplying groove 23 after passing through the lubricant supplying hole 21 of the end plate 6. The lubricant supply path 33 is passed through. Finally, the lubricating oil is discharged to the direction change path 16 of the end plate 6.

  FIG. 15 shows another example of a lubricant supply path for lubricating oil. In this example, the moving block is attached to a moving block main body 41 having a load ball rolling groove and a ball return passage, and an end face in the moving direction of the moving block main body 41, and connects the load ball rolling groove and the ball return passage. It has an end plate 42 in which a direction change path is formed, and a lubrication plate 43 sandwiched between the moving block main body 41 and the end plate 42. The lubrication plate 43 is covered with the end plate 42.

  A lubricant supply groove 44 that forms a lubricant supply path is dug in the contact surface of the lubrication plate 43 that contacts the end plate 42. One end in the longitudinal direction of the lubricant supply groove 44 is connected to a lubricant supply hole 45 to which a lubricant is supplied from the outside of the end plate 42, and the other end in the longitudinal direction of the lubricant supply groove is connected to a discharge port. Is done. The lubricant supply path formed by the lubricant supply groove 44 may have a portion where the cross-sectional area gradually decreases toward the discharge port, or the cross-sectional area may be reduced at the discharge port. The lubricant supply groove forming the lubricant supply path 46 may be dug in the lubricating plate 43 incorporated in the end plate 42 instead of the end plate 42 as in this example.

  The present invention is not limited to being embodied in the above-described embodiment, and can be variously modified without changing the gist of the present invention. For example, the shape and structure of the moving block and the track rail can be variously changed, and a roller can be used as a rolling element instead of a ball. In the above embodiment, an attachment is interposed between the moving block main body and the end plate to form a lubricant supply path for the lubricating oil. However, the moving block main body and the end plate are not interposed without the attachment. A lubricant supply path for lubricating oil may be formed between the plate and the lubricant supply groove. Furthermore, the lubricant supply path may be formed in a member other than the end plate or the lubrication plate (for example, a member that is mounted on the moving block separately from the end plate, or a member that is mounted on the outer surface of the end plate). Furthermore, in the above-described embodiment, an example in which a linear guide is used as the motion guide device has been described. However, the present invention can be applied to a curved motion guide device that guides a curved motion, and also to a ball spline and a roller spline. it can.

1 is a perspective view (including a partial cross-sectional view) of a motion guide device according to an embodiment of the present invention. Cross section of motion guide device (cross section in direction perpendicular to track rail) Cross section of ball circulation path End plate top view Part V enlarged view of FIG. Part V enlarged view of FIG. The figure which shows the ball and retainer band which move the direction change path of an end plate Top view of the attachment Top view of the attachment Top view of end plate with embedded attachment Perspective view of end plate with embedded attachment Cross section of end plate with embedded attachment XIII-XIII sectional view of FIG. Diagram showing lubricant supply path for lubricating oil (side view of moving block) The figure which shows the other example of the lubricant supply path | route for lubricating oil (side view of a moving block) A perspective view showing a lubrication method using a conventional grease gun A perspective view showing a forced oiling method using a conventional automatic pump

Explanation of symbols

1. Track rail (track member)
1a ... Ball rolling groove (rolling element rolling part)
3. Ball (rolling element)
4 ... Moving block 5 ... Moving block body 5c ... Loaded ball rolling groove (loaded rolling element rolling part)
5d: Ball return path (rolling element return path)
6. End plate (lid member)
6a ... Contact surface 8 ... Retainer band 8a ... Spacer 8b ... Connecting portion (end of the retainer band in the width direction)
16 ... Direction change path 21 ... Lubricant supply hole 22 ... First lubricant supply groove (lubricant supply groove)
23 ... Second lubricant supply groove (lubricant supply groove)
30 ... Discharge port 33, 46 ... Rolling body circulation path 35 ... Retainer guide part

Claims (3)

A raceway member in which a rolling element rolling part extending along the longitudinal direction is formed, a load rolling element rolling part facing the rolling element rolling part is formed, and substantially parallel to the loaded rolling element rolling part. In a motion guide apparatus comprising: a moving block having a rolling element circulation path including a rolling element return path extending to a plurality of rolling elements arranged in the rolling element circulation path;
The moving block is provided with a lubricant supply path for supplying a lubricant to the rolling element circulation path,
The lubricant supply passage cross-sectional area at the outlet is connected to the rolling element circulation path, rather smaller than the cross-sectional area of the other portion,
The moving block is attached to a moving block main body having the rolling rolling element rolling part and the rolling element return passage, and an end face in the moving direction of the moving block main body, and the loaded rolling element rolling part and the rolling element return A lid member on which a direction change path connecting the passages is formed,
In the lid member, a first lubricant supply groove for supplying a lubricant to the rolling element circulation path is dug,
A motion guide apparatus in which a second lubricant supply groove having a smaller cross-sectional area than the first lubricant supply groove is dug into the first lubricant supply groove .   The motion guide according to claim 1, wherein the lubricant supply path has a portion in which a cross-sectional area gradually decreases toward the discharge port, or a cross-sectional area is narrowed in the discharge port. apparatus. The rolling element is rotatably held in a series by a belt-like retainer band,
A retainer guide portion for guiding an end portion of the retainer band in the width direction is formed in the direction change path of the lid member,
The outlet of the lubricant supply path, the motion guide device according to claim 1 or 2, characterized in that it is connected to the retainer guide portion of the direction changing passage.

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