JP2010159871A - Guiding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a maintenance-free guiding device not requiring a periodical grease feeding operation by incorporating a grease feeding means in a shaft member. <P>SOLUTION: There is provided a guiding device equipped with a raceway member having a rolling body rolling surface on its periphery and a plurality of rolling bodies rolling on the rolling body rolling surface. In the guiding device, the raceway member is equipped with a grease feeding means containing an occluding body for occluding a lubricating agent for feeding grease to the rolling body. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a guide device including a raceway member having a rolling element rolling surface on the outer periphery and a plurality of rolling elements that roll on the rolling element rolling surface.

  The guide device disclosed in Patent Document 1 is an example of a guide device conventionally known as a cam follower.

  As shown in Patent Document 1, the cam follower is assembled rotatably through a cylindrical shaft-shaped stud having a rolling element rolling surface formed on the outer periphery and a plurality of rolling elements arranged on the rolling element rolling surface. And a cylindrical outer ring formed. An inner circumferential rolling element rolling surface on which the rolling element rolls is formed on the inner circumference of the outer ring, and a path through which the rolling element rolls is formed together with the rolling element rolling surface. The outer ring is held in the axial direction of the stud by a flange formed at one end of the stud and a side plate fitted into the stud, and is held rotatably with respect to the stud.

  The cam follower formed in this way can receive a load by rotating while the outer ring is in direct contact with the counterpart part, including the cam mechanism, various conveying devices, conveyors, bookbinding devices, Widely used in machining center tool changers, pallet changers, automatic coating machines, automatic warehouse sliding forks, automatic door guides, etc.

  Moreover, as shown in Patent Document 1, a grease hole is provided in the shaft center of the stud, and one end of the grease hole is opened to an injection port formed on the outer peripheral surface of the stud, The other end is open to a greasing port formed on the rolling element rolling surface of the stud. The cam follower formed in this way can inject a lubricant from an injection port formed on the outer peripheral surface of the stud, and can lubricate the rolling element from the greasing port through a greasing hole. Yes. In addition to the outer peripheral surface of the stud, the position of the inlet is also known in which a greasing hole is extended to the end surface of the stud and is opened at the end surface of the stud.

  Furthermore, as shown in Patent Documents 2 and 3, a separator made of a lubricant-containing polymer is interposed between adjacent rolling elements, or a plastic grease is filled in a rolling path of the rolling elements. Cam followers that directly lubricate rolling elements are known.

Japanese Patent Laid-Open No. 10-196647 JP 2000-145791 A Japanese Utility Model Publication No. 6-32809

  However, according to the conventional cam follower lubrication method, maintenance such as periodically injecting the lubricant from the inlet is required. In addition, even when a separator made of a polymer containing a lubricant is interposed in a small space such as between adjacent rolling elements, or when plastic grease is filled, the amount of lubricant that can be filled at one time is small, and maintenance can be performed. Although the frequency is low, there is a problem that periodic greasing work that is very laborious is still necessary. In addition, there is a similar problem in a guide device other than a cam follower, such as a linear motion roller.

  The present invention has been made to solve the above-described problems, and provides a maintenance-free guide device that does not involve periodic greasing work by incorporating a greasing means in the track member of the guide device. The purpose is to do.

  The guide device according to the present invention that solves the above-described problems is a guide device that includes a raceway member having a rolling element rolling surface on an outer periphery and a plurality of rolling elements that roll on the rolling body rolling surface. Is characterized by comprising a greasing means including an occlusion body that occludes the lubricant that lubricates the rolling element.

  Since the guide device according to the present invention formed as described above is provided with the greasing means on the raceway member, the amount of lubricant that can be occluded can be remarkably increased, and periodic greasing work can be performed. Unnecessary maintenance-free can be made possible.

It is a partial cross section perspective view of the cam follower concerning this embodiment. It is a partial cross section figure of the stud of the cam follower concerning this embodiment. It is AA sectional drawing in FIG. It is a figure which shows the greasing means of the cam follower which concerns on this embodiment. It is a partial cross section perspective view of the linear motion roller which concerns on 2nd Embodiment. It is BB sectional drawing in FIG. It is sectional drawing of the track base of the linear motion roller which concerns on 2nd Embodiment.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described 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 present embodiment are not necessarily essential to the solution means of the invention. Absent.

[First Embodiment]
FIG. 1 is a partial cross-sectional perspective view of a cam follower according to the first embodiment, FIG. 2 is a partial cross-sectional view of a stud of the cam follower according to the first embodiment, and FIG. FIG. 4 is a cross-sectional view taken along the line AA, and FIG. 4 is a diagram illustrating a greasing means for the cam follower according to the first embodiment.

  As shown in FIG. 1, the cam follower 1 according to the first embodiment includes a stud 10 as a race member having a rolling element rolling surface 14 formed on the outer periphery, and a plurality of rolling elements that roll on the rolling element rolling surface 14. The outer ring 20 is rotatably assembled via the rolling element 30.

  The stud 10 has a flange 13 extending in the circumferential direction of the stud 10 at one end in the axial direction, and a thread groove 11 at the other end. The cam follower 1 according to the present embodiment can be fastened and fixed to a mating member by a thread groove 11. The cam follower 1 can be fastened by inserting a tool into the hexagonal hole 12 formed at the approximate center of the flange 13 of the stud 10.

  Further, as described above, the rolling element rolling surface 14 is formed on the outer peripheral surface of the stud 10, and the recess 15 is formed in the no-load region of the rolling element rolling surface 14 as described later, A greasing means 40 is fitted into the recess 15, and an outer surface of the greasing means 40 is formed as a rolling element rolling surface 41.

  Here, the no-load region of the rolling element rolling surface 14 means that the outer ring 20 faces the position where the outer ring 20 comes into contact with the mating part in the rolling element rolling surface 14 formed on the outer periphery of the stud 10. A region that is formed on the opposite side of the load region that directly receives the load to be received and that does not directly apply the load that the outer ring 20 receives. Referring to FIG. 2, the rolling element rolling surface 14 formed on the outer periphery of the stud 10. An area on the substantially upper half side.

  The outer ring 20 is formed in a cylindrical shape, an inner peripheral rolling element rolling surface 21 is formed on the inner peripheral side, and a plurality of rolling elements are formed between the outer ring 20 and the rolling element rolling surface 14 formed on the outer periphery of the stud 10. 30 are arranged and rotatably assembled with respect to the stud 10, and the outer peripheral rolling surface 22 is formed so as to be able to receive a load by directly contacting the counterpart component. The rolling surface 22 is chamfered at the corners so as not to hinder the smooth rotational movement of the outer ring 20.

  Further, the outer ring 20 is held in the axial direction by a flange 13 formed at one end of the stud 10 in the axial direction and a disk-shaped side plate 50 fitted in the stud 10. The outer ring 20 is assembled rotatably by the flange 13 and the side plate 50 without dropping from the stud 10. The side plate 50 is not limited to a disk shape as long as the outer ring 20 and the plurality of rolling elements 30 are not dropped off. For example, the side plate 50 may be formed in a substantially C shape and fitted into the stud 10.

  The plurality of rolling elements 30 are constituted by cylindrical rollers, and are arranged so that the rolling element rolling surfaces 14 can roll.

  Further, the plurality of rolling elements 30 can be held at a predetermined interval and posture by the cage 31 to prevent skew caused by the rolling elements 30 coming into contact with each other or tilting, and Even when it is rotated at a high speed, it is formed so that smooth rotational motion can be performed. The cage 31 is preferably formed of a flexible synthetic resin. If the skew of the rolling elements 30 can be prevented, the cage 31 may not be provided. If the rolling elements 30 are arranged on the outer periphery of the stud 10 without providing the cage 31, the number of rolling elements 30 that can be arranged can be increased as compared with the case where the cage 31 is provided. Since the received load becomes small, the rated load of the cam follower 1 can be designed to be large.

  Next, the greasing means 40 will be described with reference to FIGS.

  As shown in FIG. 2, the greasing means 40 according to the present embodiment is fixed by being fitted into a recess 15 formed in a no-load region of the rolling element rolling surface 14 of the stud 10 and fastening a tightening bolt 42. Has been.

  In this way, if the greasing means 40 is arranged in the no-load region of the rolling element rolling surface 14, the greasing means 40 is built in the stud 10 without receiving the load received by the outer ring 20 by the greasing means 40. Therefore, the amount of lubricant stored by the greasing means 40 can be increased, and the area of the rolling element rolling surface 14 that is not receiving a load can be used effectively.

  Next, the configuration of the greasing means 40 will be described.

  As shown in FIG. 2 to FIG. 4, the greasing means 40 includes a fan-shaped casing 44 formed with substantially the same curvature as the outer periphery of the stud 10, an occlusion body 45 built in the casing 44, and a casing. Application bodies 43a, 43b formed at the lower end of 44, supply bodies 46a, 46b connecting the application bodies 43a, 43b and the occlusion body 45, and a bottom plate 47 sandwiching the application bodies 43a, 43b together with the casing 44, have.

  As described above, since the casing 44 is formed with substantially the same curvature as the outer shape of the stud 10, the outer surface of the casing 44 is used as a rolling element rolling surface 41 in a no-load region that does not require strength due to receiving a load. Can be used.

  Further, as described above, the casing 44 is formed with a bolt hole 48 through which the fastening bolt 42 is inserted so that the greasing means 40 can be fixed to the stud 10 by the fastening bolt 42.

  The casing 44 and the bottom plate 47 may be formed of any material, but are preferably formed of synthetic resin or the like. Thus, if the casing 44 and the bottom plate 47 are comprised with a synthetic resin etc., the casing 44 and the bottom plate 47 provided with the external shape matched with the shape of the recessed part 15 formed in the stud 10 can be manufactured easily.

  The occlusion body 45 is impregnated with a lubricant and can occlude the lubricant in the casing 44. That is, the occlusion body 45 is made of a material capable of absorbing and holding a large amount of lubricant, and is preferably formed of, for example, polyester felt or sintered resin.

  Moreover, the application bodies 43a and 43b are formed in a band shape, one end is connected to the occlusion body 45 via the supply bodies 46a and 46b, and the other end protrudes from the rolling element rolling surface 14 to roll the rolling element rolling surface. It is formed so that it can contact with the rolling element 30 which rolls 14. Furthermore, the application bodies 43a and 43b are formed of a material that can apply the lubricant to the rolling element 30 that rolls on the rolling element rolling surface 14 without stagnation, such as wool mixed polyester felt or sintered resin. It is preferable to form by. Here, if the application bodies 43a and 43b are belt-like, when the rolling element 30 is a needle roller, the lubricant can be applied in accordance with the length of the roller.

  As shown in FIGS. 2 and 3, the applying bodies 43 a and 43 b are arranged in parallel to each other along the bottom surface 15 a of the recess 15 between the casing 44 containing the occlusion body 45 and the bottom surface 15 a of the recess 15. Yes. As described above, since the applying bodies 43a and 43b are disposed below the occlusion body 45, the lubricant impregnated in the occlusion body 45 is supplied from the occlusion body 45 to the applying bodies 43a and 43b without difficulty by the action of gravity. Thus, the lubricant impregnated in the occlusion body 45 can be consumed without remaining, and the lubricant can be directly supplied from the occlusion body 45 to the rolling element 30.

  Moreover, as shown in FIG. 3, since the application bodies 43a and 43b are arrange | positioned symmetrically with respect to the perpendicular direction S of the axial cross section of the stud 10, the outer ring | wheel 20 rotated to any of a forward direction and a reverse direction. Even in this case, the lubricant can be efficiently lubricated immediately before the rolling element 30 enters the load region.

  Further, as shown in FIG. 4, the bottom plate 47 is formed so as to be able to hold the applying bodies 43 a and 43 b in cooperation with the lower end of the casing 44. Thus, since the greasing means 40 is holding the application bodies 43a and 43b arrange | positioned at the lower end of the casing 44 with the baseplate 47, the greasing means 40 can be manufactured as a unit, and the cam follower 1 can be manufactured. It can be manufactured easily.

  Thus, in the cam follower 1 according to the first embodiment, components such as the occlusion body 45 and the application bodies 43a and 43b are assembled to the casing 44 formed by resin molding or the like, and the application bodies 43a and 43b are attached to the bottom plate 47. The greasing means 40 is assembled as a unit by being sandwiched between them, and the greasing means 40 manufactured as a unit is incorporated in the recess 15 formed in the stud 10, and the greasing means 40 is attached to the stud 10 with the fastening screw 42. After fixing, a plurality of rolling elements 30 held by the cage 31 are arranged on the rolling element rolling surfaces 14 and 41, and the stud 10 is placed on the inner periphery of the outer ring 20 until one side surface of the outer ring 20 comes into contact with the flange 13. Can be assembled by fitting the side plate 50 to the other side surface side of the outer ring 20.

  As described above, since the cam follower 1 according to the first embodiment incorporates the greasing means 40 in the no-load region of the stud 10, periodic maintenance can be performed without changing the rated load and the external dimensions of the cam follower 1. Maintenance-free cam followers can be provided.

[Second Embodiment]
In the cam follower 1 according to the first embodiment described above, the guide device has been described in which the rolling elements 30 are arranged between the stud 10 and the outer ring 20, and a load is applied when the counterpart component is in direct contact with the outer ring 20. A linear motion roller 100 according to a second embodiment to be described next will be described with respect to an example of a guide device having a form different from that of the first embodiment. Note that members that are the same as or similar to those in the first embodiment described above are given the same reference numerals, and descriptions thereof are omitted.

  FIG. 5 is a partial cross-sectional perspective view of the linear motion roller according to the second embodiment, FIG. 6 is a cross-sectional view taken along the line BB in FIG. 5, and FIG. 7 is a straight line according to the second embodiment. It is sectional drawing of the track base of a moving roller.

  As shown in FIG. 5, the linear motion roller 100 according to the second embodiment is formed in a flat plate shape, and a track base 110 as a track member in which arc portions 111 are formed at both ends in the longitudinal direction, and the track. A plurality of rolling elements 130 that roll on rolling element rolling surfaces 114 and 141 formed on the outer peripheral surface of the base 110 are provided.

  The rolling element rolling surfaces 114 and 141 are continuously connected by a circular arc part 111 formed on the rail platform 110, and form an infinite circulation path along the longitudinal direction of the rail platform 110. The plurality of rolling elements 130 are directly subjected to a load from the counterpart component by rolling on the infinite circulation path. The plurality of rolling elements 130 are held by the retainer 60 attached to the rail 110 so that they can roll along the rolling element rolling surfaces 114 and 141.

  The plurality of rolling elements 130 are constituted by cylindrical rollers having a recess 131 formed in a substantially central portion thereof, and the rolling element rolling surfaces 114 and 141 are arranged to be able to roll.

  As shown in FIG. 6, the retainer 60 is formed to hold the side surfaces of the plurality of rolling elements 130, and the plurality of rolling elements 130 are exposed to the outside in the no-load region (the right region in FIG. 6). It is covered with the retainer 60 so that it does not. Further, in the load region (the region on the left side in FIG. 6), the plurality of rolling elements 130 are exposed to the outside, and the exposed rolling elements 130 can come into direct contact with the counterpart parts and receive a load. ing.

  Further, a center guide 112 is formed on the rolling element rolling surface 114 in the load region so as to protrude along the rolling direction of the rolling element 130, and the center guide 112 is formed substantially at the center of the rolling element 130. Engage with the recess 131. Thus, since the recess 131 formed in the rolling element 130 is engaged with the center guide 112 formed on the rolling element rolling surface 114, the skew caused by the roller being inclined with respect to the rolling direction. Can be prevented, and smooth rolling of the rolling element 130 can be realized.

  Further, the rolling element 130 in the load region is held by a retainer guide 61 formed on the retainer 60. The retainer guide 61 extends so as to face the above-described center guide 112, and engages with the recess 131 of the rolling element 130 in the same manner as the center guide 112. Thus, since the retainer guide 61 is engaged with the recess 131, the rolling element 130 is prevented from falling off the rail platform 110. In other words, in the load region, the rolling element 130 has the recess 131 of the rolling element 130 sandwiched between the retainer guide 61 and the center guide 112.

  As shown in FIGS. 6 and 7, the greasing means 140 is fitted in the no-load region of the way 110, and the outer surface of the greasing means 140 is formed as a rolling element rolling surface 141.

  As shown in FIG. 7, the rail platform 110 includes a metal rail platform body 110 a formed in a semi-elliptical shape, and a greasing means 140 formed in a semi-elliptical shape substantially the same shape as the rail platform body 110 a. 42 is attached.

  The greasing means 140 includes a casing 144 formed in substantially the same shape as the outer periphery of the rail base body 110a, an occlusion body 145 built in the casing 144, and an application sandwiched between the casing 144 and the rail body main body 110a. Body 143a, 143b, and supply body 146a, 146b which connects application body 143a, 143b and occlusion body 145 are provided.

  As described above, since the casing 144 is formed in substantially the same shape as the outer periphery of the rail base body 110a, the outer surface of the casing 144 is a rolling element rolling surface 141 in a no-load region that does not require strength due to receiving a load. Can be used as The casing 144 may be formed of any material, but is preferably formed of synthetic resin or the like. Thus, if the casing 144 is formed with a synthetic resin or the like, the casing 144 having an outer shape matched to the outer peripheral shape of the rail 110a can be easily manufactured.

  In addition, the application bodies 143a and 143b are arranged symmetrically with respect to the vertical direction S ′ of the rail base body 110a, and the rolling element 130 rotates in either the forward direction or the reverse direction and applies a load. Even so, the lubricant can be efficiently lubricated immediately before the rolling element 130 enters the load region.

  In addition, since the basic structure of the occlusion body 145, the application bodies 143a and 143b, and the supply body 146a 146b is the same as that of the greasing means 40 described in the first embodiment, the description thereof is omitted.

  As described above, the linear motion roller 100 according to the second embodiment incorporates the greasing means 140 in the no-load region of the rail 110, so that the rated load and the external dimensions of the linear motion roller 100 are changed. In addition, a maintenance-free cam follower that does not require regular maintenance can be provided.

  In the cam follower 1 according to the first embodiment and the linear motion roller 100 according to the second embodiment, the occlusion bodies 45 and 145 and the application bodies 43a, 43b, 143a and 143b are connected to the supply bodies 46a, 46b and 146a. However, the occlusion body 45 and the applying bodies 43a, 43b, 143a, and 143b may be directly connected and the supply bodies 46a, 46b, 146a, and 146b may be omitted.

  Furthermore, in the cam follower 1 according to the first embodiment, the case has been described in which the bottom surface 15a of the recess 15 of the stud 10 is formed as a flat surface, and the application bodies 43a and 43b are arranged along the bottom surface 15a. The application bodies 43 a and 43 b may be arranged at a predetermined angle with respect to each other as long as they are arranged symmetrically with respect to the vertical direction S of the axial cross section of the stud 10. Further, the applying bodies 43a, 43b, 143a, 143b are not limited to a belt shape, and if the lubricant can be applied from the occlusion body 45 to the rolling elements 30, the arrangement of the applying bodies 43a, 43b, 143a, 143b It can be appropriately changed according to the shape of the rolling element 30.

  Furthermore, if the rotational direction of the cam follower 1 according to the first embodiment and the linear motion roller 100 according to the second embodiment is limited to one direction, the application bodies 43a, 43b, 143a, 143b are provided at two locations. It is not necessary to arrange in one, and you may arrange in one place suitably according to the direction of rotation. Furthermore, for the purpose of increasing the amount of lubrication, three or more application bodies 43a, 43b143a, and 143b may be disposed. Further, in order to supply the lubricant to the occlusion body 45 that has consumed the lubricant, it may be carried out from the inlet formed in the outer periphery of the stud 10 and the rail 110 through a greasing hole provided in the stud 10 and the rail 110. good. Moreover, you may display a mark on the collar side surface of the stud 10 so that a greasing means can be reliably arrange | positioned in a no-load area | region.

  Moreover, in the cam follower 1 which concerns on 1st Embodiment, although the stud 10 was formed in the column shape and the rolling-element rolling surface 14 was formed in the outer periphery of the stud 10, the stud 10 rolled to the outer periphery. You may form from the cylindrical inner ring | wheel which formed the moving body rolling surface, and the axis | shaft inserted by this inner ring | wheel. Thus, if the stud 10 is composed of a plurality of parts, the greasing means can be applied to a conventionally known roller follower.

  Furthermore, the greasing means 40 and 140 are not limited to the above-described embodiment, and for example, the above-described casings 44 and 144 themselves may be formed of oil-containing plastic. Furthermore, in the linear motion roller 100 according to the second embodiment, an oil-impregnated plastic may be attached to the inner surface facing the rolling element 130 of the retainer 60 in the no-load region.

  Further, the greasing means described above is applied to the unloaded region of the moving block of the linear motion guide device in which the moving block is slidably engaged with the track rail having a rectangular section through the rolling element along the longitudinal direction of the track rail. Can also be applied. In addition, the fixing means of the greasing means 40 is not limited to the fastening bolt 42. Furthermore, in the linear motion roller 100 according to the second embodiment, the recess 131 and the center guide 112 of the rolling element 130 can be omitted.

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

  DESCRIPTION OF SYMBOLS 1 Cam follower, 10 Stud, 11 Thread groove, 12 Tightening hole, 13 鍔 part, 14, 41, 114, 141 Rolling element rolling surface, 15 Recessed part, 15a Bottom surface, 20 Outer ring, 21 Inner circumference rolling element rolling surface, 22 Rolling surface, 30, 130 Rolling body, 31 Cage, 40, 140 Grease supply means, 42 Clamping bolt, 43a, 43b, 143a, 143b Application body, 44, 144 Casing, 45, 145 Occlusion body, 46a, 46b 146a, 146b Supply body, 47 bottom plate, 48 bolt hole, 50 side plate, 60 retainer, 61 retainer guide, 100 linear motion roller, 110 rail.

Claims (9)

A track member having a rolling element rolling surface on the outer periphery;
In a guide device comprising a plurality of rolling elements that roll on the rolling element rolling surface,
The said track member is equipped with the greasing means containing the occlusion body which occludes the lubrication agent which lubricates the said rolling element, The guide apparatus characterized by the above-mentioned. The guide device according to claim 1, wherein
The said greasing means is arrange | positioned in the no-load area | region of the said track member, The guide apparatus characterized by the above-mentioned. In the guidance device according to claim 1 or 2,
The said greasing means is assembled | attached to the said track member, The guide apparatus characterized by the above-mentioned. In the guidance device according to any one of claims 1 to 3,
The track member is formed in a cylindrical shape,
The guide device includes an outer ring that is rotatably assembled to the track member, and has an inner peripheral rolling element rolling surface that is opposed to the rolling element rolling surface on the inner periphery.
The plurality of rolling elements are interposed between the rolling element rolling surface and the inner circumferential rolling element rolling surface,
The guide device according to claim 1, wherein the greasing means is formed in a semicircular shape having substantially the same curvature as the outer shape of the shaft member. In the guidance device according to any one of claims 1 to 3,
The said track member is provided with the cylindrical inner ring | wheel provided with the said rolling-element rolling surface on the outer periphery, and the axis | shaft inserted by the said inner ring | wheel. In the guidance device according to claim 4 or 5,
The applicator is arranged symmetrically with respect to a vertical direction of an axial section of the track member. In the guidance device according to any one of claims 1 to 3,
The track member is formed in a substantially flat plate shape, and an arc portion is formed on the end face in the longitudinal direction,
The guide device, wherein the arc portion and the rolling element rolling surface continuously form an infinite circulation path of the plurality of rolling elements. The guide device according to any one of claims 1 to 7,
The said greasing means is provided with the application body which one end connects to the said occlusion body and the other end contacts with the said rolling element. The guide device according to claim 8, wherein
The guide device, wherein the application body is disposed between the occlusion body and the track member.

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