JP2019135412A - Motion guide device and manufacturing method of the same - Google Patents

Abstract

To provide a motion guide device which achieves improvement of guide accuracy and performs predetermined dimensional control without needing complicated processing, and to provide a manufacturing method of the motion guide device.SOLUTION: A motion guide device includes: a raceway member in which a rolling element rolling surface is formed along a longitudinal direction; and a moving member provided with a load rolling element rolling surface formed at a position facing the rolling element rolling surface and a non-load rolling element rolling passage formed in parallel to the load rolling element rolling surface. In the motion guide device, the moving member is assembled to the raceway member through multiple rolling elements, which are disposed so as to freely roll in a load rolling passage formed by the rolling element rolling surface and the load rolling element rolling surface, so that the moving member can reciprocate in a longitudinal direction of the raceway member. At a portion of a center part of the moving member which faces an upper surface of the raceway member, a damping member which forms predetermined clearances with the upper surface is attached. The damping member is attached while forming the predetermined clearances at both end parts as seen in a longitudinal direction and both end parts as seen in a width direction at a moving member body.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a motion guide device and a manufacturing method thereof, and more particularly to a motion guide device having a damping function and a manufacturing method thereof.

  A motion guide device that guides a linear reciprocating motion of a moving member along a raceway member through rotation of a rolling element is currently used in mechanical devices in all fields. In such a motion guide device, further improvement in the guide accuracy of the moving member is desired, and various configurations have been proposed.

  As an improvement for improving such guidance accuracy, in the motion guide device described in Patent Document 1 below, the buffer member is provided in front of or behind the moving member as viewed in the vertical direction, and surrounds the track member. The slider has a fixed surface that is flush with the fixed surface of the moving member with respect to the track member, and the inner contour of the slider is largely the contour of the track member, from 0 to 40 μm. It is configured to be adapted to form a buffer gap. An oil film is formed in the buffer gap, and the damping action is exhibited by the action of the oil film.

Japanese Examined Patent Publication No. 6-102288

  However, the motion guide device described in Patent Document 1 described above has a configuration in which a slider is attached to the front or rear of the moving member, so that the slider for damping, the moving member for guiding, and each member However, there is a problem that the moving member cannot be directly damped. Moreover, since it is the structure which attaches a slider to a moving member, there also existed a problem that it was difficult to achieve size reduction of a motion guide apparatus. Furthermore, in the motion guide device provided with the conventional buffer member, it is necessary to set the buffer gap to 0 to 40 μm, and the moving member is assembled to the track member via the rolling element, so that the moving member is attached to the moving member. In order to set the buffer gap between the slider and the raceway member within the above-mentioned range, the size of the buffer gap can be adjusted by adjusting the diameter of the rolling element or machining the facing surface of the raceway member and the slider. There is also a problem that it is difficult to reduce man-hours and it is difficult to reduce the manufacturing cost.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is an exercise guide device and an exercise guide device that improve guide accuracy and can perform predetermined dimension management without requiring complicated processing. It aims at providing the manufacturing method of.

  The motion guide device according to the present invention that solves the above-described problems includes a raceway member on which a rolling element rolling surface is formed along a longitudinal direction, and a loaded rolling element rolling formed at a position facing the rolling element rolling surface. Formed by a running surface, a moving member formed with a no-load rolling element rolling path formed in parallel with the loaded rolling element rolling surface, the rolling element rolling surface and the loaded rolling element rolling surface. The moving member is assembled so as to be able to reciprocate in the longitudinal direction of the raceway member via a plurality of rolling elements that are movably arranged in the load rolling path, and the moving member is a rolling surface of the load rolling element. And a no-load rolling element rolling path, a moving member main body having a central portion facing the upper surface of the track member and a pair of legs facing the left and right side surfaces of the track member, and the load rolling The ends of the runway and the no-load rolling element raceway are communicated with each other. A direction change path and a pair of side lids attached to both ends of the moving member main body, respectively, and formed by the load rolling path, the no-load rolling element rolling path and the pair of the direction change paths. In the motion guide device having an infinite circulation path, a damping material having a predetermined clearance from the upper surface is attached to a portion of the central portion facing the top surface of the track member, and the damping material is the moving member main body. Are attached to both ends in the longitudinal direction and both ends in the width direction via predetermined gaps.

  Further, the method of manufacturing the motion guide device according to the present invention includes a race member, a moving member that is assembled so as to be relatively movable with respect to the race member via a plurality of rolling elements, and an attenuation provided integrally with the moving member. A method of manufacturing a rolling guide device comprising a material, the first step of assembling a moving member body in which a reference rolling element is assembled to a reference track member having a smooth transfer surface, the moving member body and the transfer surface And a second step of injecting and solidifying the damping material.

  According to the motion guide device according to the present invention, the damping member is attached to both ends in the longitudinal direction and both ends in the width direction of the moving member main body via predetermined gaps, so that the moving member is directly damped. The sealing means for sealing the oil film formed between the damping material and the track member can be formed in the gap formed around the damping material, so that the oil that forms the oil film is formed in the moving member body It is possible to achieve highly accurate guidance without invading the loaded rolling element rolling surface and adversely affecting the smooth rolling of the rolling element.

  Further, according to the method of manufacturing the motion guide device according to the present invention, the track member, the moving member that is assembled to be movable relative to the track member via a plurality of rolling elements, and the moving member are provided integrally. A method of manufacturing a rolling guide device comprising a damping material, comprising: a first step of assembling a moving member body in which a reference rolling member is assembled to a reference track member having a smooth transfer surface; the moving member body; Since there is a second step of injecting and solidifying the damping material between the transfer surfaces, it is possible to accurately form a gap formed between the raceway member and the damping material without performing laborious processing. it can.

The perspective view of the exercise | movement guide apparatus which concerns on embodiment of this invention. AA sectional drawing in FIG. The bottom view of the moving member main body of the movement guide apparatus which concerns on embodiment of this invention. The bottom view which shows the modification of the moving member main body of the exercise | movement guide apparatus which concerns on embodiment of this invention. Sectional drawing which shows the state which assembled | attached to the reference | standard track member the moving member main body which attached the reference | standard rolling body and the temporary circulation member in the manufacturing method of the movement guide apparatus which concerns on embodiment of this invention. The perspective view which shows the state which assembled | attached to the reference | standard track member the moving member main body which attached the reference | standard rolling body and the temporary circulation member in the manufacturing method of the movement guide apparatus which concerns on embodiment of this invention. The perspective view for demonstrating the process of attaching the area | region limitation member in the manufacturing method of the movement guide apparatus which concerns on embodiment of this invention. The perspective view for demonstrating the process of attaching the edge part jig | tool in the manufacturing method of the movement guide apparatus which concerns on embodiment of this invention. BB sectional drawing in FIG. The perspective view for demonstrating the process which inject | pours the damping material in the manufacturing method of the movement guide apparatus which concerns on embodiment of this invention. Sectional drawing which shows the modification of the rolling element of the exercise | movement guide apparatus which concerns on this embodiment.

  Embodiments of a motion guide device and a method for manufacturing the same according to the present invention will be described below with reference to the drawings. The following embodiments do not limit the invention according to each claim, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. .

  FIG. 1 is a perspective view of a motion guide device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a diagram of the motion guide device according to the embodiment of the present invention. FIG. 4 is a bottom view of the moving member main body, FIG. 4 is a bottom view showing a modified example of the moving member main body of the movement guide device according to the embodiment of the present invention, and FIG. 5 is a movement guide according to the embodiment of the present invention. FIG. 6 is a cross-sectional view showing a state in which a moving member main body to which a reference rolling element and a temporary circulation member are attached in a method for manufacturing an apparatus is assembled to a reference track member, and FIG. 6 is a method for manufacturing a motion guide apparatus according to an embodiment of the present invention. FIG. 7 is a perspective view showing a state in which the moving member main body to which the reference rolling element and the temporary circulation member are attached to the reference track member, and FIG. 7 is a region limiting member in the method of manufacturing the motion guide device according to the embodiment of the present invention. Explain the process of attaching FIG. 8 is a perspective view for explaining a step of attaching an end jig in the method of manufacturing the motion guide device according to the embodiment of the present invention, and FIG. FIG. 10 is a perspective view for explaining the step of injecting the damping material in the method of manufacturing the motion guide device according to the embodiment of the present invention, and FIG. 11 is related to the present embodiment. It is sectional drawing which shows the modification of the rolling element of a motion guide apparatus.

  As shown in FIGS. 1 and 2, the motion guide device 1 according to the present embodiment includes a track member 10 having a rolling element rolling surface 11 in the longitudinal direction and a plurality of cylindrical rolling elements 30. 10 and a moving member 20 that reciprocates linearly along the rolling element rolling surface 11.

  A plurality of bolt holes are formed in the race member 10 from the upper surface 12 toward the bottom surface. The motion guide apparatus 1 according to the present embodiment is fastened to a counterpart component such as a base by inserting bolts into the plurality of bolt holes formed in the track member 10. The track member 10 is a long member formed in a substantially rectangular cross section, and is a member in which a rolling element rolling surface 11 extending in the longitudinal direction is formed on the surface thereof. The rolling element rolling surface 11 is described later. It is possible to receive loads from a plurality of rolling elements 30 arranged between the moving member 20 and the moving member 20. In addition, the rolling element 30 is formed with a total of four rolling element rolling surfaces 11 so as to form a pair of upper and lower sides on both side surfaces of the race member 10.

  The moving member 20 has a substantially U-shaped cross section so as to straddle the upper surface 12 and the left and right side surfaces 13, 13 of the track member 10, and is a reciprocating direction of the moving member main body 21 and the moving member main body 21. And a pair of side lids 22 attached to both end faces. The moving member body 21 is made of a material having high strength such as steel, and is preferably formed by forging. The side cover 22 is preferably made of a synthetic resin or the like. In addition, the direction change path which is not illustrated is formed in the assembly surface with the moving member main body 21 of the side cover 22, and the load rolling path which consists of the rolling element rolling surface 11 and the load rolling element rolling surface 23, and The end portions of the no-load rolling element rolling path 24 are communicated with each other to form an infinite circulation path including a rolling element rolling path, an unloaded rolling element rolling path, and a direction changing path.

  The moving member main body 21 and the side lid 22 have a central portion 21 a that faces the upper surface 12 of the track member 10 and a pair of leg portions 21 b and 21 b that face the left and right side surfaces 13 and 13 of the track member 10. . As shown in FIG. 2, the moving member main body 21 has, for example, a total of four load rolling element rolling surfaces 23 extending in the longitudinal direction of the race member 10 so as to face the rolling element rolling surface 11 of the race member 10. Is formed.

  The moving member main body 21 is formed with a total of four unloaded rolling element rolling paths 24 extending in parallel with the loaded rolling element rolling surface 23. A guide member 25 capable of guiding the circulating rolling element 30 is assembled to the no-load rolling element rolling path 24. In this case, the no-load rolling element rolling path 24 is processed in the moving member main body 21, and the no-load rolling element rolling path 24 is assembled with the guide member 25 formed of synthetic resin or the like, so that no load is easily applied by simple processing. It is possible to guide the rolling element into the rolling element rolling path 24.

  Further, an attenuation member 40 is attached to the upper surface 12 of the central portion 21a of the moving member main body 21 from the upper surface 12 via a predetermined gap. The gap between the damping member 40 and the upper surface 12 is preferably set to 20 to 40 μm. As shown in FIG. 3, the damping member 40 is attached to both ends in the longitudinal direction and both ends in the width direction of the central portion 21a of the moving member main body 21 via predetermined gaps. A sealing member 42 is attached along the outer peripheral edge of the damping material 40. As shown in FIG. 2, the sealing member 42 extends from both side surfaces of the damping member 40 toward the upper surface of the track member 10, and extends along the longitudinal direction of the moving member main body 21. It is formed continuously along the moving direction. The tip of the sealing member 42 is formed in a tapered shape and is in contact with the upper surface of the track member 10, so that an increase in surface pressure when contacting the track member 10 is suppressed. By providing the sealing member 42 in this way, the oil film interposed between the damping member 40 and the upper surface 12 is held. The damping material 40 is preferably a synthetic resin material used as a low friction sliding surface material.

  The surface facing the upper surface 12 of the damping member 40 may be formed smoothly as shown in FIG. 3, but as shown in FIG. 4, a geometrical structure composed of a plurality of grooves 41 intersecting with each other. An uneven shape with a pattern may be used. In this case, since the above-described oil film can be held in the plurality of grooves 41, it is possible to form an oil film while holding more oil. In this case, as a method of forming the uneven shape on the attenuation member 40 ′, the attenuation material 40 ′ may be scraped, or by transferring the uneven shape formed on the upper surface of the reference track member 51 described later. It may be formed.

  Further, the plurality of rolling elements 30 are connected to each other by a spacer (not shown) disposed between the adjacent rolling elements 30 and a belt-like connecting part (not shown) that connects the spacers arranged along the longitudinal direction. It is preferable to be held by a belt. Thus, collision between the rolling elements 30 can be prevented by the spacers disposed between the rolling elements 30. In addition, since the rolling elements 30 can be connected and held in series by the connection band, the rolling elements 30 can be smoothly rolled without causing an inclination of the rotating shaft while being aligned.

  In the motion guide device 1 according to the present embodiment configured as described above, the moving member 20 includes the damping member 40 having a predetermined gap from the track member 10, so that the motion guide device 1 does not increase in size. Since the moving member 20 which is the original component of the guide device 1 can have a vibration damping function and an appropriate oil film can be formed between the damping member 40 and the upper surface 12, the vibration damping accuracy is improved. It becomes possible.

  Next, with reference to FIGS. 5-10, the manufacturing method of the exercise | movement guide apparatus 1 which concerns on this embodiment is demonstrated. As shown in FIG. 5, first, the moving member main body 21 is prepared. As described above, the moving member main body 21 includes a flat plate-like central portion 21a and a pair of leg portions 21b and 21b extending from both ends in the width direction of the central portion 21a. Moreover, the load rolling-element rolling surface 23 is formed in a pair of leg part 21b along the longitudinal direction. It is preferable that the moving member main body 21 be formed by forging because the damping material bites better when the damping material is injected as described later.

  Next, the reference rolling element 52 is attached to the load rolling element rolling surface 23 of the moving member main body 21. The reference rolling element 52 may be a rolling element similar to the rolling element 30 incorporated in the motion guide device 1, but the moving member body 21 and the track member 10 when the moving member body 21 is assembled to the track member 10. Therefore, it is not necessary to form an infinite circuit, and the reference rolling element 52 may be disposed only on the loaded rolling element rolling surface 23.

  Thereafter, as shown in FIG. 6, the temporary circulation members 53 are respectively attached to the end portions along the longitudinal direction of the leg portions 21 b so that the reference rolling element 52 does not fall off. It is preferable that the temporary circulation member 53 is configured as a divided body including only portions corresponding to the leg portions 21b of the side lid 22 described above. With this configuration, the end jigs 55a and 55b, which will be described later, can be assembled between the left and right temporary circulation members 53 at portions corresponding to the central portion 21a of the side lid 22.

  Next, the moving member main body 21 assembled with the reference rolling element 52 and the temporary circulation member 53 is assembled with the reference track member 51 (first step). The reference track member 51 is a member in which a rolling element rolling surface is formed along the longitudinal direction in the same manner as the track member 10, but unlike the track member 10, no mounting hole is formed on the upper surface 51a. It is formed smoothly. In addition, by forming a transfer surface having a concavo-convex shape corresponding to the concavo-convex shape shown in FIG. 4 on the upper surface 51a, when the attenuation material is injected, the concavo-convex shape is transferred to the surface of the attenuation material 40. It is possible. Further, since the upper surface 51a of the reference track member 51 is located at the same position as the surface of the attenuation member 40 facing the track member 10 after the damping material is injected, a predetermined gap is provided between the attenuation member 40 and the upper surface 12 of the track member 10. In order to form, it is preferable that the upper surface 51 a of the reference track member 51 is formed higher than the upper surface 12 of the track member 10. In addition to the adjustment method based on the position of the upper surface 51 a of the reference track member 51, this gap adjustment method is, for example, a method in which the reference rolling element 52 is made smaller in diameter than the rolling element 30 and the damping material 40 and the upper surface 12 of the track member 10. The gap may be adjusted.

  Thereafter, the region limiting member 54 is inserted and attached between the reference track member 51 and the moving member main body 21. The region limiting member 54 is attached to a continuous portion of the central portion 21a and the pair of leg portions 21b. The region limiting member 54 prevents the damping material from leaking to the side surface of the reference track member 51 when the damping material is injected, and forms a predetermined gap at both ends in the width direction of the damping material 40. It becomes possible.

  Next, a pair of end jigs 55a and 55b are attached to both ends of the moving member main body 21 in the longitudinal direction. As shown in FIG. 9, the end jig is attached to one end of the moving member main body 21, and is attached to the first end jig 55 a having the injection port 56 and the other end of the moving member main body 21. And a second end jig 55b. As described above, the first end jig 55a is formed on the injection port 56 having the insertion hole for assembling the injector 43 for injecting the damping material, and the upper surface 51a of the movable member main body 21 and the reference track member 51. An insertion piece 57 having a spout 58 inserted between the transfer surface and communicating with the injection port 56 is provided. The second end jig 55b is a member that can block the end of the moving member main body 21 so that the damping material does not leak out, and, like the first end jig 55a, the second end jig 55b and the reference member. An insertion piece 57 to be inserted between the upper surfaces 51 a of the track members 51 is formed. As described above, since the end jigs 55a and 55b have the insertion pieces 57, it is possible to form a predetermined gap at both ends in the longitudinal direction of the damping material 40 when the damping material is solidified. .

  Next, as shown in FIG. 10, the injector 43 in which the damping material is sealed is attached to the injection port 56 of the first end jig 55 a, and the damping material is supplied from the spout 58 to the upper surface of the reference track member 51. Injected between the transfer surface formed on the movable member 21 and the moving member main body 21. As the injector 43, a conventionally known injector composed of a piston and a cylinder can be appropriately employed. The damping material is preferably a viscous material that solidifies in a predetermined time. Further, a confirmation hole 59 is formed in the second end jig 55b, and the reference track member 51 is injected by injecting the damping material poured out from the spout 58 until it is discharged from the confirmation hole 59. The damping material can be injected between the upper surface 51a and the moving member main body 21 without any gap.

  Thereafter, the damping material is solidified in a state where the moving member main body 21 to which the reference rolling element 52, the temporary circulation member 53, the region limiting member 54, and the end jigs 55a and 55b are attached is attached to the reference track member 51. (Second step). Before the second step, the first end jig 55a is removed from the moving member main body 21 together with the injector 43, and the damping material material adhering to the reference track member 51 is wiped off. A member similar to the part jig 55b may be combined with the first end part jig 55a and held until the damping material is solidified.

  When the damping material is solidified, the moving member main body 21 is removed from the reference track member 51, and then the reference rolling element 52, the temporary circulation member 53, the region limiting member 54, and the end jigs 55a and 55b are removed. The moving member main body 21 having a predetermined gap from the upper surface 12 of the track member 10 on a surface facing the upper surface 12 of the track member 10 in the central portion 21a of the member main body 21 and having an attenuation member 40 having a predetermined gap on the outer peripheral edge. Can be manufactured. Thereafter, the moving member 20 is configured by attaching the rolling elements 30 and the side lids 22 to the moving member main body 21, and the movement guide device 1 can be manufactured by assembling the moving member 20 to the track member 10.

  In this manner, by manufacturing the motion guide device 1, the damping material 40 is ground and the roller incorporated in the motion guide device 1 in order to adjust the gap size between the damping material 40 and the upper surface 12 of the track member 10. A complicated adjustment process such as adjustment of the diameter of the moving body 30 can be reduced, and predetermined dimension management can be performed without requiring complicated processing. Further, since the processes other than the injection of the damping material 40 are the same as the manufacturing method of the existing motion guide device, the motion guide device 1 according to the present embodiment can be easily performed without making a significant change to the existing manufacturing process. It can be manufactured.

  In the above-described embodiment, the case where a cylindrical roller is used as the rolling element 30 has been described. However, the rolling element is not limited to a roller, and a spherical ball 300 is used as shown in FIG. It doesn't matter.

  Further, the case where the damping member 40 is attached to the center portion 21a of the moving member main body 21 on the surface facing the upper surface 12 of the race member 10 has been described. However, the position where the damping member is attached is the race member 10. 2, for example, a damping material may be attached between the upper and lower rolling elements 30 of the leg 21 b in FIG. 2 or below the lower rolling element 30. I do not care. 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.

  DESCRIPTION OF SYMBOLS 1 Movement guide apparatus, 10 Track member, 11 Rolling body rolling surface, 20 Moving member, 21 Moving member main body, 21a Center part, 21b Leg part, 23 Load rolling element rolling surface, 24 Unloaded rolling element rolling path, 30 Rolling element, 40 damping material, 41 groove, 51 reference track member, 52 reference rolling element, 53 temporary circulation member, 54 region limiting member, 55a first end jig, 55b second end jig.

Claims (8)

A raceway member in which a rolling element rolling surface is formed along the longitudinal direction;
A loaded rolling element rolling surface formed at a position opposite to the rolling element rolling surface, and a moving member formed with an unloaded rolling element rolling path formed in parallel with the loaded rolling element rolling surface;
The moving member reciprocates in the longitudinal direction of the track member via a plurality of rolling elements that are arranged to freely roll in a loaded rolling path formed by the rolling element rolling surface and the loaded rolling element rolling surface. Assembled to be movable,
The moving member is formed with the loaded rolling element rolling surface and the no-load rolling element rolling path, and a pair of opposed central portions opposed to the upper surface of the track member and left and right side surfaces of the track member. A moving member body having legs,
A direction change path that connects the ends of the load rolling path and the no-load rolling element rolling path is formed, and a pair of side covers that are respectively attached to both ends of the moving member main body,
In the motion guide device having an infinite circuit formed by the loaded rolling path, the unloaded rolling element rolling path and the pair of direction changing paths,
A damping material having a predetermined gap with the upper surface is attached to a portion of the central portion facing the upper surface of the track member,
The motion guide device is characterized in that the damping material is attached to both ends in the longitudinal direction and both ends in the width direction of the moving member main body via predetermined gaps. The motion guide device according to claim 1,
An unevenness shape is formed on a surface of the damping material facing the top surface, and the motion guide device is characterized in that: The motion guide apparatus according to claim 2,
The movement guide apparatus according to claim 1, wherein the uneven shape is a geometric pattern including a plurality of grooves intersecting each other. In the exercise | movement guide apparatus of any one of Claim 1 to 3,
A motion guide device, wherein sealing members are disposed at least at both ends in the width direction of the damping material. A method of manufacturing a motion guide apparatus comprising: a track member; a moving member that is assembled so as to be relatively movable with respect to the track member via a plurality of rolling elements; and a damping member that is integrally provided on the moving member.
A first step of assembling a moving member body in which a reference rolling element is assembled to a reference track member having a smooth transfer surface;
A method for manufacturing a motion guide apparatus, comprising: a second step of injecting and solidifying the damping material between the moving member main body and the transfer surface. In the manufacturing method of the movement guide device according to claim 5,
The second step includes a step of assembling a pair of end jigs at both ends of the moving member main body in the longitudinal direction. In the manufacturing method of the movement guide device according to claim 5 or 6,
The method of manufacturing a motion guide apparatus, wherein the second step includes a step of assembling a region limiting member to the moving member main body. In the manufacturing method of the movement guide device according to any one of claims 5 to 7,
The method for manufacturing a motion guide device, wherein the moving member body is manufactured by forging.

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