JP2019105295A - Rolling guide device and resin member for use in rolling guide device - Google Patents

Abstract

To suitably suppress the occurrence of a torque increase by properly maintaining a lubrication state even in a severe environment such as high-speed rotation and a high temperature.SOLUTION: This rolling guide device 10 comprises: an inner member 21 for guiding a raceway surface 23 to an outer face 22; an outer member 11 having a raceway surface 13 opposing the raceway surface 23 of the inner member 21, and arranged outside the inner member 21; a plurality of rolling bodies 31 rollingly arranged between both the raceway surfaces 13, 23; and a resin member 32 for aligning and holding the plurality of rolling bodies 31 arranged between both the raceway surfaces 13, 23 with a prescribed separation interval in a rolling direction by being arranged between the plurality of rolling bodies 31. Then, a contact face contacting with at least the rolling bodies 31 at the resin member 32 is formed as a face whose surface roughness is lower than that of an intermediate face by being applied with etching treatment after forming the intermediate face having a metal mold skin to which a planar shape of a metal mold is transferred by injection-molding a resin material.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a rolling guide device and a resin member used for the rolling guide device.

  As mechanical elements conventionally used, for example, rolling guide devices such as cross roller bearings, ball screws, linear guides, linear motion bearings, ball splines, etc. are known. The rolling guide apparatus includes an inner member having a raceway surface on the outer surface, an outer member having a raceway surface opposite to the raceway surface of the inner member and disposed outside the inner member, and the two raceways. The outer member reciprocates in the axial direction or circumferential direction of the inward member by having the plurality of rolling elements disposed rotatably between the surfaces and the resin member disposed between the plurality of rolling elements. It is a device that can move or rotate freely. In addition, the following patent document 1 is shown as what discloses the example of the rolling guide apparatus which concerns on a prior art. The rolling guide device disclosed in the following Patent Document 1 is known as a so-called cross roller bearing, and a row of roller rolling paths are formed along the circumferential direction between the outer ring and the inner ring, A plurality of rollers are arranged in the rolling path. The plurality of rollers are configured to revolve while rotating in the roller rolling path in accordance with the relative rotational movement of the inner ring and the outer ring.

  In the conventional rolling guide device represented by the cross roller bearing disclosed in Patent Document 1 below, a plurality of rolling elements disposed between the inward member and the outward member perform the rolling motion repeatedly. Therefore, contact stress is repeatedly applied to the components of these rolling guide devices. Therefore, a metal material or a resin material or the like excellent in fatigue life, wear resistance, etc. is generally adopted as a material constituting the inward member, the outward member, the rolling element, and the resin member.

  By the way, the resin member used in the rolling guide device according to the prior art is generally called a spacer retainer, and is disposed between the two raceways of the inner ring and the outer ring by being disposed between a plurality of rolling elements. It is used as a member that exhibits the function of aligning and holding the plurality of rolling elements at a predetermined spacing in the rolling direction. And about the contact surface with the rolling element in this resin member, the condition on manufacture did not exist regarding the surface property. That is, with respect to the rolling element contact surface of the resin member used as the spacer retainer, the surface property at the time of mold cutting processing in the mold used when formed by injection molding of the resin material was transferred as it is .

Japanese Patent Application Laid-Open No. 05-044720

  However, in the case of a resin member having a mold surface to which the surface properties of the mold have been transferred as it is, particularly when the rolling guide device is used under high speed rotation or high temperature environment, lubricating oil is It is difficult to hold, and oil film breakage may occur between the resin member used as a spacer retainer and the rolling element, which may cause a problem of increased torque.

  With regard to the surface properties of the resin member used as the spacer retainer described above, if the surface is too rough, the substantial contact area with the rolling elements becomes small, and a local compression force increases, causing a lubrication failure, Eventually, it will cause an increase in torque and excessive heat generation. On the other hand, when the surface is too smooth, it is difficult to hold the lubricant and oil film breakage occurs, which eventually causes an increase in torque and excessive heat generation. That is, in the case of the resin member used in the rolling guide device according to the prior art, the lubricating oil holding ability becomes poor even if the contact surface with the rolling element is too smooth or too rough. The optimum condition of the contact surface with the moving body was not found.

  The present invention has been made in view of the problems existing in the above-described prior art, and an object thereof is to suppress an increase in a local compressive force with a rolling element for a resin member used for a rolling guide device At the same time, the lubricating oil can be effectively held or supplied to the contact surface with the rolling elements, so that the lubricating state is properly maintained even under severe environments such as high speed rotation and high temperature. It is an object of the present invention to provide a rolling guide device capable of preferably suppressing the occurrence of torque increase, and a resin member used for the rolling guide device.

  The rolling guide device according to the present invention is an outer member disposed on the outer side of the inward member, having an inner member having a raceway surface on the outer surface, and a raceway surface facing the track surface of the inner member. And rolling elements disposed between the two raceways, and rolling the plurality of rolling elements disposed between the two raceways by being disposed between the rolling elements. A resin member held in alignment at a predetermined separation distance in a direction, wherein at least a contact surface of the resin member with the rolling element is a surface property of a mold by injection molding a resin material After forming the intermediate surface which has the mold surface to which it transferred, it is characterized by forming as a surface whose surface roughness is lower than the said intermediate surface by performing an etching process.

  Further, the resin member according to the present invention is an outward member disposed on the outer side of the inward member, having an inward member having a raceway surface on the outer surface, and a raceway surface opposed to the raceway surface of the inward member. It is used for a rolling guide apparatus provided with a member and a plurality of rolling elements arranged to be able to roll between both the raceway surfaces, and arranged between the two raceway surfaces by being arranged between the plurality of rolling elements A resin member for aligning and holding the plurality of rolling elements at a predetermined spacing distance in the rolling direction, wherein at least a contact surface of the resin member with the rolling element is a mold by injection molding of a resin material After forming an intermediate surface having a mold surface to which the surface properties have been transferred, etching is performed to form a surface having a surface roughness lower than that of the intermediate surface.

  According to the present invention, with respect to the resin member used for the rolling guide device, it is possible to suppress an increase in the local compressive force with the rolling element and to effectively hold or supply lubricating oil to the contact surface with the rolling element. Can be made possible. Thus, according to the present invention, a rolling guide device capable of suitably suppressing the occurrence of an increase in torque by appropriately maintaining the lubricating state even in a severe environment such as high speed rotation and high temperature, and the rolling guide device Can be provided.

It is a perspective view showing a cross roller bearing concerning this embodiment. It is a sectional view along the axis of rotation of the cross roller bearing concerning this embodiment. It is a notch top view which shows the arrangement structure of the roller in the rolling path of the cross roller bearing which concerns on this embodiment. It is a figure which drew the image at the time of observing with a microscope the contact surface with the roller in the spacer concerning a prior art, and the contact surface with the roller in a spacer concerning this embodiment, and the figure in a figure (a) Shows the contact surface of the prior art, and the section (b) shows the contact surface of the present embodiment. It is the figure which drew the image at the time of observing the contact surface with the roller in the spacer which concerns on this embodiment with a scanning electron microscope (SEM). It is a figure which shows the measurement result of the surface roughness of the contact surface with the roller in the spacer based on a prior art, and the contact surface with the roller in a spacer concerning this embodiment, and the code (a) in a figure is a contact of prior art The surface roughness of the surface is shown, and the symbol (b) indicates the surface roughness of the contact surface of the present embodiment. It is an appearance perspective view which illustrates one form of a linear guide device concerning this embodiment constituted by a resin member to which an etching processing concerning the present invention was given. It is sectional drawing for demonstrating the infinite circulation path with which the linear guide apparatus shown in FIG. 7 is provided. It is a figure which illustrates the case where the rolling guide device concerning this embodiment is constituted as a ball screw device.

  Hereinafter, preferred embodiments for carrying out the present invention will be described using 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. .

  First, an embodiment of a cross roller bearing as a rolling guide device to which the present invention can be applied will be described with reference to FIGS. 1 to 3. Here, FIG. 1 is a perspective view showing a cross roller bearing according to the present embodiment. FIG. 2 is a cross-sectional view along the rotation axis direction of the cross roller bearing according to the present embodiment. Furthermore, FIG. 3 is a cutaway plan view showing the arrangement structure of the rollers in the rolling path of the cross roller bearing according to the present embodiment.

  The cross roller bearing 10 according to the present embodiment includes an outer ring 11 as an outer member formed in an annular shape, an inner ring 21 as an inner member formed in an annular shape similar to the outer ring 11, and the outer ring 11 and the inner ring 21. And a plurality of rollers 31 as a plurality of rolling elements that roll while applying a load therebetween. In the cross roller bearing 10, the outer ring 11 and the inner ring 21 are combined so as to be relatively rotatable by rolling of the plurality of rollers 31. In FIG. 1, in order to facilitate understanding of the internal structure of the cross roller bearing 10, a part of the outer ring 11 is cut away and drawn.

  A raceway groove 13 having a substantially V-shaped cross section is formed as a raceway surface on the inner surface 12 of the outer ring 11 facing the inner ring 21, and the raceway groove 13 is formed along the circumferential direction of the outer ring 11. The raceway groove 13 of the present embodiment is formed by the two rolling surfaces 13a and 13b crossing at a right angle, and each rolling surface 13a and 13b is inclined 45 degrees with respect to the rotation axis O of the inner ring 21. Is configured. Further, an attachment hole 14 for attaching a fixing bolt (not shown) is formed in the outer ring 11 so as to penetrate in the rotational axis O direction.

  On the other hand, also on the outer surface 22 of the inner ring 21 facing the inner surface 12 of the outer ring 11, a track groove 23 having a substantially V-shaped cross section is formed as a track surface, and this track groove 23 is formed along the circumferential direction of the inner ring 21 ing. The raceway groove 23 of the present embodiment is formed to face the raceway groove 13 of the outer ring 11. Similarly to the raceway groove 13 on the outer ring 11 side, the raceway groove 23 is also formed by intersecting two rolling surfaces 23a and 23b at a right angle, and each of the raceway surfaces 23a and 23b is a rotation of the inner ring 21. It is configured to incline 45 degrees with respect to the axis O. And, in a state where the outer ring 11 and the inner ring 21 are assembled via the roller 31, the rolling surface 13a of the outer ring 11 and the rolling surface 23a of the inner ring 21 face each other, and the rolling surface 13b of the outer ring 11 and the inner ring 21 The rolling contact surfaces 23b of the two are opposed to each other. Further, the inner ring 21 is formed with a mounting hole 24 for mounting a fixing bolt (not shown) so as to penetrate in the rotational axis O direction.

  The raceway groove 23 on the inner ring 21 side and the raceway groove 13 on the outer ring 11 side are disposed to face each other to form a roller rolling path 30, and a plurality of rollers 31 are arrayed in the roller rolling path 30. ing. Here, since one raceway groove 13 and one raceway groove 23 are formed in the outer ring 11 and the inner ring 21 according to the present embodiment, there is a row of roller rolling paths 30 between the outer ring 11 and the inner ring 21. It is formed. Further, since the raceway groove 13 and the raceway groove 23 are formed along the circumferential direction of the outer ring 11 and the inner ring 21, the roller rolling path 30 of the present embodiment is formed annularly around the rotation axis O. ing. Then, as shown in FIG. 3, the rollers 31 are arranged in the roller rolling path 30, and when the inner ring 21 and the outer ring 11 relatively rotate, the rollers 31 revolve while rotating in the roller rolling path 30. In the roller rolling path 30, there exist two types of rollers 31a and 31b having different rotational axis directions by 90 degrees, and these rollers 31a and 31b are alternately arranged along the circumferential direction of the roller rolling path 30. ing.

  The roller 31a rolls while applying a load between the rolling surface 13a on the outer ring 11 side and the rolling surface 23a on the inner ring 21 side, and the roller 31b rolls on the rolling surface 13b of the outer ring 11 and the inner ring The rolling is performed while applying a load to the rolling surface 23 b on the side 21. That is, the rollers 31a and 31b of the present embodiment are arranged in the roller rolling path 30 in a cross roller structure. The load acting directions on the rollers 31 a and 31 b are orthogonal to each other, and the load acting directions on the rollers 31 a and 31 b are inclined 45 degrees with respect to the rotation axis O of the inner ring 21 and the outer ring 11. Therefore, in the cross roller bearing 10 according to the present embodiment, the inner ring from any direction such as an axial load acting along the rotation axis O of the inner ring 21 and the outer ring 11 or a radial load acting from the direction orthogonal to the rotation axis O 21 or the outer ring 11 can be loaded.

  Furthermore, in the cross roller bearing 10 according to the present embodiment, a spacer 32 as a resin member is provided between the roller 31a and the roller 31b adjacent to each other, and the roller 31a and 31b are mutually separated by the spacer 32. Direct contact is prevented, and the plurality of rollers 31a, 31b disposed in the roller rolling path 30 are aligned and held at a predetermined separation distance in the rolling direction.

  In the cross roller bearing 10 according to the present embodiment configured as described above, since the rotation axis of each roller 31 is inclined with respect to the rotation axis O of the inner and outer rings 11 and 21, each roller 31 When rolling on the runway 30, there is a differential slip between the raceway grooves 13 and 23. In particular, when the cross roller bearing 10 is used under high-speed rotation or high temperature environment, frictional heat is generated between each roller 31 and the spacer 32, and it is difficult to hold lubricating oil at the contact surface thereof. As a result, oil film breakage may occur between the spacer 32 as a resin member and the roller 31 used as a component, which may cause a problem of increased torque. Further, as described in the section of the background art, regarding the surface properties of the spacer 32 as a resin member used as a spacer retainer, when the surface is too rough, the substantial contact area with the roller 31 becomes small, and locally The increase in the compression force causes lubrication failure, which ultimately causes an increase in torque and excessive heat generation. On the other hand, when the surface is too smooth, it is difficult to hold the lubricant and oil film breakage occurs, which eventually causes an increase in torque and excessive heat generation. However, in the prior art, the optimum condition of the contact surface with the roller 31 was not found regarding the spacer 32 as a resin member.

  Therefore, as a result of intensive research conducted by the inventors, it is possible to improve the surface roughness of the contact surface of the spacer 32 with the roller 31 while making it possible to easily maintain the lubricant on the contact surface. As a means for leaving the shape, it was invented to etch the spacer 32 which is a resin member, and as a result of carrying out the etching under various conditions, it came to find the optimum condition. That is, the inventors performed an etching process on the spacer 32, which is a resin member, incorporated the spacer 32 subjected to the etching process into the cross roller bearing 10, and conducted various operation tests. Even when the roller bearing 10 was used under high speed rotation or high temperature environment, very good results were obtained without causing an increase in torque and excessive heat generation. In addition, while finding the means for making fine concavo-convex shape remain on the contact surface in order to make it easy to hold the lubricant while improving the surface roughness of the contact surface of the spacer 32 with the roller 31. The present inventors have found out an etching process as an optimum means after trial and error of various improvement means such as changing the shape of the spacer 32, which is a resin member, providing an oil groove, or applying embossing. It is successful.

  The inventors of the present invention who obtained the above results next find the difference between the spacer 32 subjected to the etching process obtained this time and the spacer according to the prior art, and the form condition of the spacer 32 according to the present embodiment. Succeeded in finding Therefore, the morphological conditions of the spacer 32 according to the present embodiment subjected to the etching process found by the present inventors will be described next with reference to FIGS. 4 to 6. Here, FIG. 4 is a view depicting an image when the contact surface of the spacer according to the prior art with the roller and the contact surface of the spacer according to the present embodiment with the roller are observed with a microscope. The middle diagram (a) shows the contact surface of the prior art, and the diagram (b) shows the contact surface of the present embodiment. Moreover, FIG. 5 is the figure which drew the image image at the time of observing the contact surface with the roller in the spacer which concerns on this embodiment with a scanning electron microscope (SEM). Furthermore, FIG. 6 is a diagram showing the measurement results of the surface roughness of the contact surface with the roller in the spacer according to the prior art and the contact surface with the roller in the spacer according to the present embodiment Shows the surface roughness of the contact surface of the prior art, and the symbol (b) shows the surface roughness of the contact surface of the present embodiment.

  As shown in the partial view (a) of FIG. 4, when the inventors observed the contact surface with the roller in the spacer according to the prior art with a microscope, the surface characteristics of the contact surface of the conventional spacer had a constant direction. The ridges and valleys had continuous ridges and valleys. When the inventors confirmed the direction of the streaky unevenness, it was confirmed that the direction coincides with the feed direction of the cutting tool when manufacturing the mold used for injection molding the spacer. Therefore, it is clear that the line-shaped unevenness of the contact surface with the roller in the spacer according to the prior art is the surface property of the mold used when injection molding the resin material is transferred as it is. became.

  On the other hand, as shown in the part (b) of FIG. 4, with regard to the form of the spacer 32 according to the present embodiment subjected to the etching process found by the present inventors, the mountain and valley shape was continuous by the execution of the etching process. The streak-like unevenness was alleviated, and the unevenness was lower than the conventional valley-valley shape, and the unevenness was in a random state. That is, from the observation result shown in FIG. 4, the inventors injection-mold the resin material on at least the contact surface of the spacer 32 with the roller 31 as one of the form conditions of the spacer 32 as the resin member. After forming the intermediate surface having the mold surface to which the surface properties of the mold have been transferred, it is confirmed that it is preferable that the surface is formed to have a surface roughness lower than that of the intermediate surface by performing an etching process. did.

  In addition, as shown in FIG. 5, in order to find further form conditions of the spacer 32 according to the present embodiment, the present inventors conducted scanning electron microscopy (SEM) of the surface characteristics of the spacer 32 subjected to the etching process. ) And observed the image. The SEM image shows an image obtained when observed at a magnification of 1,000 with a scanning electron microscope (SEM). As shown in FIG. 5, it is apparent that the contact surface with the roller 31 in the spacer 32 according to the present embodiment is formed as a surface having a plurality of wrinkles when viewed in a scanning electron microscope (SEM) image It became. The inventors believe that the presence of these multiple wrinkles contributes to improving the lipophilicity of the lubricant.

  Furthermore, in order to find out another form condition of the spacer 32 according to the present embodiment, as shown in FIG. The surface roughness of the contact surface with the roller in the spacer 32 according to the present embodiment was measured. As a result, the surface roughness of the contact surface with the roller in the spacer according to the prior art shows 1.42 to 1.49 μm in Ra, and the surface roughness of the contact surface with the roller 31 in the spacer 32 according to the present embodiment It could be confirmed that Ra represents 1.15 to 1.29 μm. As is apparent from this result, the surface of the contact surface of the spacer 32 according to the present embodiment with the roller 31 has a surface roughness that is higher than that of the contact surface of the prior art by performing the etching process found by the present inventors. Is formed as a low surface.

  When the spacer 32 according to the present embodiment is incorporated in the cross roller bearing 10 by having the above-described various form conditions found by the present inventors, the cross roller bearing 10 is rotated at high speed or in a high temperature environment. It has been found that very good results can be obtained without causing an increase in torque or excessive heat generation even when used under. That is, by subjecting the resin member used for the cross roller bearing 10 to an etching process to form the spacer 32 having various form conditions found by the present inventors, the local compressive force with the roller 31 can be reduced. While being able to suppress increase, the resin member which makes it possible to hold | maintain or supply lubricating oil effectively with respect to a contact surface with the roller 31 can be obtained. As a result, the cross roller bearing 10 that can appropriately suppress the occurrence of an increase in torque by appropriately maintaining the lubrication state even in a severe environment such as high speed rotation and high temperature, and the like, is used for the cross roller bearing 10 It is possible to provide the spacer 32 as a resin member to be

  As mentioned above, although the suitable embodiment of the present invention was described, the technical scope of the present invention is not limited to the range given in the above-mentioned embodiment. It is possible to add various change or improvement to the above-mentioned embodiment. That is, the “rolling guide device” in the present specification includes, for example, general rolling bearings used in machine tools and the like, non-lubricated bearings used in vacuum, linear guides and linear guiding devices, ball spline devices, ball screw devices, Including devices with any rolling and sliding motion, such as roller screw devices.

(Example of application to linear guide device)
For example, the rolling guide device according to the present invention can be configured as a linear guide device as shown in FIG. 7 and FIG. 8, and according to the present invention described above for the resin member used in such a linear guide device. By performing the etching process, it is possible to realize a linear guide device capable of suitably suppressing the occurrence of an increase in torque by appropriately maintaining the lubricating state even under severe environments such as high speed guidance and high temperature. . Here, FIG. 7 is an external perspective view illustrating one form of the linear guide device according to the present embodiment, which is made of the resin member subjected to the etching process according to the present invention. FIG. 8 is a cross-sectional view for explaining an infinite circulation path provided in the linear guide device shown in FIG.

  First, the configuration of the linear guide device 40 illustrated in FIGS. 7 and 8 will be described. The linear guide device 40 as the rolling guide device according to the present embodiment includes the track rail 41 as the inward member and the track rail 41. A moving block 43 as an outward member slidably mounted via balls 42 installed as a plurality of rolling elements. The track rail 41 is a long member whose cross section orthogonal to the longitudinal direction is formed in a substantially rectangular shape, and becomes a track when a plurality of balls 42 roll on its surface (both side faces on the rail upper side) A rolling element rolling surface 41 a as a raceway surface is formed over the entire length of the raceway rail 41.

  Here, the track rail 41 may be formed to extend linearly or may be formed to extend curvilinearly. Further, although the number of rolling element rolling surfaces 41a illustrated in FIGS. 7 and 8 is a total of four in two on the left and two on the left and right, the number of the rows is arbitrarily changed according to the application of the linear guide device 40 can do.

  On the other hand, the moving block 43 is provided with a load rolling element rolling surface 43a as a raceway surface at a position corresponding to the rolling element rolling surface 41a. A load rolling path 52 is formed by the rolling element rolling surface 41 a of the raceway rail 41 and the load rolling element rolling surface 43 a of the moving block 43, and a plurality of balls 42 are sandwiched. Furthermore, the moving block 43 is provided with four non-load rolling paths 53 extending in parallel to the rolling element rolling surfaces 41 a, and a direction changing path 55 connecting each non-loading rolling path 53 and each load rolling path 52. It is done. A combination of one load rolling path 52 and no load rolling path 53 and a pair of direction changing paths 55 connecting them forms one infinite circulation path (see FIG. 8).

  A plurality of balls 42 are installed in the infinite circulation path constituted by the load rolling path 52, the no-load rolling path 53, and the pair of direction changing paths 55, 55 in an infinitely circulating manner, whereby the moving block 43 is formed. Reciprocation relative to the track rail 41 is possible.

  In the linear guide device 40 according to the present embodiment having the configuration as described above, the spacer 44 as the resin member according to the present invention is disposed between the plurality of balls 42. The spacer 44 disposed between the balls 42 is connected by a belt 45. Then, an etching process is performed after at least the contact surface with the ball 42 in the spacer portion 44 forms an intermediate surface having a mold surface to which the surface properties of the mold are transferred by injection molding a resin material. The spacer 44 can be configured to have the same form condition as the spacer 32 of the present embodiment described above by being formed as a surface whose surface roughness is lower than that of the intermediate surface. And by providing the spacer 44 as a resin member provided with such form conditions, the linear guide device 40 according to the present embodiment can be lubricated even under severe environments such as high speed guidance and high temperature. Maintaining the torque appropriately can suppress the occurrence of the torque increase.

(Example of application to rolling element screw device)
Also, the rolling guide device according to the present embodiment can be configured as, for example, a ball screw device 56 as shown in FIG. FIG. 9 is a view illustrating the case where the rolling guide device according to the present embodiment is configured as a ball screw device. The ball screw device 56 is a device including a screw shaft 57 as an inner member and a nut member 59 as an outer member attached to the screw shaft 57 so as to be relatively rotatable via a plurality of balls 58. .

  The screw shaft 57 is an inward member in which rolling element rolling grooves 57a as a helical raceway surface are formed on the outer peripheral surface, while the nut member 59 corresponds to the rolling element rolling grooves 57a on the inner peripheral surface. Load rolling groove as a helical raceway surface. The nut member 59 can reciprocate relative to the screw shaft 57 in accordance with the relative rotational movement of the screw shaft 57 with respect to the nut member 59.

  In the ball screw device 56, a spacer 60 as a resin member is disposed between balls 58 which are a plurality of rolling elements. Then, after forming an intermediate surface having a mold surface to which the surface properties of the mold have been transferred by injection molding a resin material, at least the contact surface of the spacer 60 with the ball 58 is subjected to the etching process. By being formed as a surface whose surface roughness is lower than that of the intermediate surface, the spacer 60 can be configured to have the same form condition as the spacer 32 of the present embodiment described above. And, by providing the spacer 60 as a resin member having such form conditions, the ball screw device 56 according to the present embodiment can properly lubricate even under severe environments such as high speed rotation and high temperature. By maintaining this, it is possible to preferably suppress the occurrence of an increase in torque.

  It is also apparent from the scope of the claims that the embodiments added with such alterations or improvements can be included in the technical scope of the present invention.

  DESCRIPTION OF SYMBOLS 10 Cross roller bearing, 11 outer ring, 12 inner surface, 13 raceway groove, 13a, 13b rolling surface, 14 mounting hole, 21 inner ring, 22 outer surface, 23 raceway groove, 23a, 23b rolling surface, 24 mounting hole, 30 roller rolling Runway 31, 31a, 31b roller, 32 spacer, O rotation shaft, 40 linear guide device, 41 track rail, 41a rolling element rolling surface, 42 ball, 43 moving block, 43a load rolling element rolling surface, 44 spacer Parts, 45 belt parts, 48, 49 screw holes, 52 load rolling path, 53 no-load rolling path, 55 direction changing path, 56 ball screw device, 57 screw shaft, 57a rolling element rolling groove, 58 ball, 59 nut member , 60 spacers.

Claims (4)

An inner member having a raceway surface on the outer surface,
An outer member disposed on the outer side of the inner member, the outer member having a raceway surface opposite to the raceway surface of the inner member;
A plurality of rolling elements disposed rotatably between the two raceways;
A resin member arranged between the plurality of rolling elements to align and hold the plurality of rolling elements disposed between the two raceways at a predetermined spacing in the rolling direction;
A rolling guide device comprising
At least the contact surface of the resin member with the rolling element forms an intermediate surface having a mold surface to which the surface properties of the mold have been transferred by injection molding a resin material, and then performing an etching process. A rolling guide device characterized in that it is formed as a surface whose surface roughness is lower than that of an intermediate surface. In the rolling guide device according to claim 1,
A rolling guide device characterized in that at least a contact surface with the rolling element in the resin member is formed as a surface having a plurality of ridges when viewed in a scanning electron microscope (SEM) image. In the rolling guide device according to claim 1 or 2,
The rolling guide device according to claim 1, wherein a surface roughness Ra of at least a contact surface of the resin member with the rolling element is 1.29 μm or less. An inner member having a raceway surface on the outer surface,
An outer member disposed on the outer side of the inner member, the outer member having a raceway surface opposite to the raceway surface of the inner member;
A plurality of rolling elements disposed rotatably between the two raceways;
And a resin member for aligning and holding the plurality of rolling elements disposed between the two raceways at predetermined intervals in the rolling direction by being disposed between the plurality of rolling elements. And
At least the contact surface of the resin member with the rolling element forms an intermediate surface having a mold surface to which the surface properties of the mold have been transferred by injection molding a resin material, and then performing an etching process. A resin member characterized by being formed as a surface whose surface roughness is lower than that of an intermediate surface.

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