JP2005009664A - Linear motion rolling guide device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small lightweight type linear motion rolling guide device of excellent assembling workability. <P>SOLUTION: In this linear motion rolling guide device, one member out of a track member 2 and a moving member 3 is provided with a first plate 5 of approximately U-shape having an approximately rectangular cross section orthogonal to a relative moving direction, having at least a pair of first rolling element rolling grooves 7 and mounted to cover the approximately rectangular outer peripheral surface of one member, while the other member is provided with a second plate 6 of approximately U-shape having at least a pair of second rolling element rolling grooves 8 provided in positions which face the first rolling element rolling grooves 7, and mounted to cover the approximately recessed inner peripheral surface of the other member. A load rolling element rolling passage is composed of either (1) a rolling passage comprising the first rolling element rolling groove 7 and the second rolling element rolling groove 8, or (2) a rolling passage comprising the first rolling element rolling groove 7 or the second rolling element rolling groove 8 and a load rolling element rolling groove formed in the track member 2 or the moving member 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a linear motion rolling guide device in which a raceway member and a moving member are engaged with each other through a rolling element so as to be relatively movable, and more particularly to a linear motion rolling guide device with good assembly workability.

  As a conventional linear motion rolling guide device, a track member (hereinafter also referred to as a track rail) and a moving member (hereinafter also referred to as a moving block) are engaged with each other through a large number of rolling elements so as to be relatively movable. Are known. Specifically, the track rail usually has a substantially rectangular longitudinal section, and at least a pair of rolling element rolling grooves extending in the longitudinal direction of the track rail are provided on opposing side surfaces. In addition, the moving block generally has a substantially U-shaped cross section (gate shape), and includes a concave plane facing the top surface of the track rail and a pair of legs facing the left and right side surfaces of the track rail. Thus, the upper surface and the opposite side surfaces of the track rail are covered and engaged with the track rail. Loaded rolling element rolling grooves as load tracks facing the rolling element rolling grooves of the track rail are provided on the inner surfaces of both legs of the moving block, and the rolling elements are divided into the rolling element rolling grooves and the loaded rolling element rolling grooves. Roll while receiving a load on the rolling element rolling path formed by the running groove. Further, the moving block is provided with a rolling element return passage for returning, for example, a spherical rolling element from one end of the load rolling element rolling path to the other end, and the rolling element return path and the load rolling element rolling path An infinite circuit of rolling elements is formed.

  In this linear motion rolling guide device, when the track rail is fixed, the moving block reciprocates along the track rail when the rolling member circulates. When the moving block is fixed, the rolling block circulates. The track rail reciprocates.

  The rolling element is made of, for example, a spherical shape with a metal having excellent rigidity so as not to be deformed. For this reason, it has been proposed that the track rail and the moving block are formed of a metal having excellent rigidity from the viewpoint of durability. However, if the whole is formed of a metal having excellent rigidity, the weight of the entire apparatus becomes heavy. Therefore, it is not possible to meet the demand for high speed and it is expensive.

  Also, as a linear motion rolling guide device, it is proposed that the rolling element rolling groove part of the track rail and the load rolling element rolling groove part of the moving block are formed of steel, and other parts are formed of synthetic resin or aluminum. (For example, refer to Patent Documents 1 to 3.)

  For example, in the linear motion rolling guide device disclosed in Patent Document 1, fitting sleeves having a substantially semicircular cross section are provided on both sleeves (both legs) of a slide base (moving block). The bearing race which forms a load rolling-element rolling groove is inserted in. In this linear motion rolling guide device, the main body portion of the slide base (moving block) is made of, for example, aluminum, and only the bearing race is made of a material having high rigidity.

  Further, the linear motion rolling guide device disclosed in Patent Document 2 is provided with concave grooves in both sleeve portions (both leg portions) of a bearing case (moving block), and in the concave groove, a load rolling element rolling groove is provided. The bearing race which forms is fitted. In this linear motion rolling guide device, the body portion of the bearing case (moving block) is made of, for example, aluminum, and only the bearing race is made of a material having high rigidity.

  Further, the linear motion rolling guide device disclosed in Patent Document 3 has a dovetail groove on both sides of a base member (track rail), and a pair of rolling element rolling grooves are formed in the dovetail groove. A load bearing track insert is inserted. In this linear motion rolling guide device, the main body portion of the base member (track rail) is made of, for example, aluminum, and only the load bearing track insert is made of a material having high rigidity (bearing steel).

Thus, in the linear motion rolling guide devices described in Patent Documents 1 to 3, the moving block and the track rail are formed of a light and inexpensive material, and the loaded rolling element rolling groove or the rolling element rolling groove. Since only the material having high rigidity is formed, the entire apparatus can be reduced in weight and can be increased in speed and inexpensive.
Japanese Examined Patent Publication No. 62-11216 (page 3, Fig. 4) Japanese Examined Patent Publication No. 2-53646 (Pages 2 and 3, Fig. 4) Japanese National Patent Publication No. 9-512078 (Claims, FIG. 5)

  However, when bearing races are fitted in the grooves provided on both legs of the moving block, the bearing race must be fitted in each groove, so that the number of grooves must be fitted. There was a problem that the assembly workability of was bad. In addition, when forming at least a pair of rolling element rolling grooves on both sides of the track rail, a load bearing track insert in which two or more rolling element rolling grooves are formed in advance is attached to the track rail. Since each side portion is fitted, the fitting operation has to be performed for each side portion, and there is a problem that the workability of assembling the track rail is poor.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a linear motion rolling guide device with good assembly workability.

  In the linear motion rolling guide device of the present invention for achieving the above object, the track member and the moving member circulate in an infinite circulation path including a loaded rolling element rolling path between the track member and the moving member. The one of the track member and the moving member is engaged with each other through a rolling element so that the cross section orthogonal to the relative movement direction is substantially rectangular, and at least a pair of first rolling element rolling grooves. And / or the other member of the track member and the moving member is a substantially U-shaped first plate that is mounted so as to cover the substantially rectangular outer peripheral surface of the one member. The other cross-section having a substantially concave shape in a cross section orthogonal to the relative motion direction and having at least a pair of second rolling element rolling grooves provided at positions opposed to the first rolling element rolling grooves. An approximately U-shape that is attached to cover the inner surface of the substantially concave shape A linear motion rolling guide device comprising the second plate, wherein the load rolling element rolling path is a rolling path consisting of the first rolling element rolling groove and the second rolling element rolling groove, or the first rolling element. One rolling element rolling groove or the second rolling element rolling groove and a rolling path composed of a loaded rolling element rolling groove formed on the raceway member or the moving member,

  According to this invention, the loaded rolling element rolling path is a rolling path consisting of the first rolling element rolling groove of the first plate and the second rolling element rolling groove of the second plate, or the first rolling element rolling path. Since it is one of a rolling path composed of a groove or a second rolling element rolling groove and a loaded rolling element rolling groove formed on the race member or the moving member, at least one of the first plate and the second plate is orbited. A load rolling element rolling path made of a metal plate having excellent mechanical strength is formed simply by mounting on a member or a moving member, and the assembling workability of the linear motion rolling guide device is improved.

  The present invention provides the above-mentioned linear motion rolling guide device, wherein the first plate has a substantially V-shaped first rolling element rolling groove in which a groove portion projects toward the opposite side portions. The substantially rectangular member provided with the first plate is positioned so that the substantially V-shaped first rolling element rolling groove portion is inserted and positioned at a position opposed to the substantially rectangular outer peripheral surface. The second plate is a flexible thin plate having a substantially V-shaped second rolling element rolling groove projecting on the opposite side to the opposing side portions, and the second plate is The substantially concave member provided has a second mounting groove that is positioned by inserting and inserting the substantially V-shaped second rolling element rolling groove portion at a position opposed to the substantially concave inner peripheral surface. To do.

  According to this invention, the opening between both side portions of the first plate made of a flexible thin plate and the substantially rectangular member (the track member or the moving member made of a substantially rectangular shape) are attached together to form the first. When the plate is pressed against the substantially rectangular member, both side portions of the first plate are elastically deformed outward from the position in contact with the substantially rectangular member. At this time, the first plate is positioned by inserting the substantially V-shaped protrusions constituting the first rolling element rolling groove into the first mounting groove of the substantially rectangular member by elastic force. As described above, the first plate can be easily and accurately mounted on the track member or the moving member with one touch only by pressing the first plate against the track member or the moving member. Is further improved.

  Also, in the case of the second plate made of a flexible thin plate, the outer peripheral surface of the second plate, the base surface connecting the both sides, and a substantially concave member (a moving member or track having a substantially concave shape). When the second plate is pressed against the substantially concave shaped member together with the inner peripheral surface of the member), both side portions of the second plate are elastic inward from the position in contact with the substantially concave shaped member. Deform. At this time, the second plate is positioned by inserting the substantially V-shaped protrusions constituting the second rolling element rolling groove into the second mounting groove of the substantially rectangular member by elastic force. As described above, the second plate can be easily and accurately mounted on the moving member or the track member with one touch only by pressing the second plate against the moving member or the track member. Is further improved.

  According to the present invention, in the linear motion rolling guide device described above, the substantially rectangular moving member or the substantially concave moving member may include both ends of the first plate in the relative motion direction or the relative motion of the second plate. Positioning means for locking both ends in the direction is formed. In this invention, it is preferable that the positioning means is a step formed on an outer peripheral surface of the substantially rectangular moving member or an inner peripheral surface of the substantially concave moving member.

  According to this invention, the substantially rectangular moving member on which the first plate is mounted on the outer peripheral surface or the substantially concave moving member on which the second plate is mounted on the inner peripheral surface has the first in the relative movement direction. Positioning means that locks both ends of one plate or both ends of the second plate is formed, so the first plate or the second plate is attached to a predetermined position of a substantially rectangular moving member or a substantially concave moving member. it can. As a result, it is possible to configure a rolling groove in which the rolling element rolls safely and stably, and a smooth reciprocating motion between the moving member and the raceway member is possible. In particular, in the present invention, it is preferable that the positioning means be a step that can be easily formed on the moving member. For example, in the case of a moving member manufactured by integral molding made of resin, linear motion rolling that can be manufactured very easily. It becomes a guide device.

  As described above, according to the linear motion rolling guide device of the present invention, a load made of a metal plate having excellent mechanical strength can be obtained simply by mounting at least one of the first plate and the second plate on the track member or the moving member. Since the rolling element rolling path is formed, a linear motion rolling guide device with good assembly workability can be obtained. According to the linear motion rolling guide device of the present invention, the first plate attached to the outer peripheral surface of the substantially rectangular moving member or the second plate attached to the inner peripheral surface of the substantially concave moving member is predetermined. Since it can be mounted at a position, it is possible to configure a rolling groove in which the rolling element rolls safely and stably, and smooth reciprocation between the moving member and the track member is possible. According to the linear motion rolling guide device of the present invention, (1) the substantially V-shaped rolling grooves of the first plate and the second plate respectively face each other to form a loaded rolling element rolling path, or (2) Since the loaded rolling element rolling path is constituted by one rolling groove of the first plate and the second plate and the rolling groove of the track member or the moving member facing the rolling groove, the rolling element is You can roll stably and accurately.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  1-3 is a figure by which an example of the linear motion rolling guide apparatus of this invention is shown. FIG. 4 is a diagram showing an example of the first plate of the present invention. FIG. 5 is a diagram showing an example of the second plate of the present invention.

  As shown in FIGS. 1 to 3, the linear motion rolling guide device of the present invention includes a track member (hereinafter referred to as a track rail) 2 and a moving member (hereinafter referred to as a moving block) 3. And the moving block 3 are engaged with each other through a rolling element 4 that circulates in an infinite circulation path including a loaded rolling element rolling path 9.

  One member of the track rail 2 and the moving block 3 has a substantially rectangular cross section relative to the relative motion direction, and has at least a pair of first rolling element rolling grooves 7 and is substantially the same as the one member. The substantially U-shaped first plate 5 mounted so as to cover the rectangular outer peripheral surface is provided, and / or the other member of the track rail 2 and the moving block 3 has a cross section orthogonal to the relative motion direction. It has a substantially concave shape and has at least a pair of second rolling element rolling grooves 8 provided at positions opposed to the first rolling element rolling grooves 7 and has a substantially concave inner periphery of the other member. A substantially U-shaped second plate 6 is provided so as to cover the surface. That is, in the linear motion rolling guide device of the present invention, the track rail 2 and the moving block 3 include both the first plate 5 and the second plate 6 or one of them.

  Such a linear motion rolling guide device according to the present invention is characterized in that the loaded rolling element rolling path 9 includes (1) the first rolling element rolling groove 7 of the first plate 5 and the second rolling element of the second plate 6. A rolling path comprising the rolling element rolling groove 8 or (2) a loaded rolling element rolling formed in the first rolling element rolling groove 7 or the second rolling element rolling groove 8 and the track rail 2 or the moving block 3. It is composed of either a rolling road consisting of a running groove.

  In other words, in the linear motion rolling guide device according to the present invention, the track rail 2 and the moving block 3 are engaged with each other through a large number of rolling elements 4 so as to be relatively movable, and one of the track rail 2 and the moving block 3 is engaged. The cross-sectional shape orthogonal to the relative motion direction is substantially rectangular, and at least a pair of first rolling element rolling grooves 7 are formed on the substantially rectangular outer peripheral surface, and the rest, that is, the track rail 2 and the moving block 3 has a substantially concave cross-sectional shape that engages with the substantially rectangular outer peripheral surface of the track rail 2 or the moving block 3 formed in the substantially rectangular shape, and has a substantially concave inner peripheral surface. A second rolling element rolling groove 8 is formed opposite to the first rolling element rolling groove 7. And the load rolling-element rolling path 9 is comprised by one or both of the 1st rolling-element rolling groove 7 and the 2nd rolling-element rolling groove 8. FIG.

  That is, the linear motion rolling guide device 1 has a mechanical strength in which the first rolling element rolling groove 7 is formed on the substantially rectangular outer peripheral surface of the track rail 2 or the moving block 3 formed in a substantially rectangular shape. An excellent substantially U-shaped first plate 5 is mounted, and a second rolling element rolling groove 8 is formed on the substantially concave inner peripheral surface of the moving block 3 or the track rail 2 formed in a substantially concave shape. A substantially U-shaped second plate 6 having excellent mechanical strength is mounted, and the rolling rolling element rolling path 9 is constituted by both rolling grooves 7 and 8, or the first plate 5 and the second plate One of the plates 6 is attached to form one rolling groove, and the opposite rolling groove is formed as one of the other rolling grooves formed on one of the track rail 2 and the moving block 3, so that the load rolling element rolling path 9 is used in both. It is characterized in that it is configured with any of the above.

  The linear motion rolling guide device 1 may be mounted with either the first plate 5 or the second plate 6, but preferably both the first plate 5 and the second plate 6 are mounted. In the following embodiment, for example, as shown in FIG. 3, a case where both the first plate 5 and the second plate 6 are mounted to configure the load rolling element rolling path 9 will be described in detail. The track rail 2 is formed in a substantially rectangular shape or a substantially concave shape and is fixed or moved. In the present embodiment, a case where the track rail 2 is formed and fixed in a substantially rectangular shape will be described. The moving block 3 is also formed in a substantially concave shape or a substantially rectangular shape, and is moved or fixed. In the present embodiment, a case where the moving block 3 is formed in a substantially concave shape and moves will be described.

  The rolling element 4 circulates in an infinite circulation path including a loaded rolling element rolling path 9 between the track rail 2 and the moving block 3. For example, as shown in FIGS. 2 and 3, the linear rolling guide is provided. It is not particularly limited as long as it is generally used in the apparatus 1, and for example, a spherical metal ball having a predetermined diameter is used. The rolling element 4 is made of a metal having excellent mechanical strength such as a steel body so as not to be deformed.

  The track rail 2 is engaged with the moving block 3 through the rolling elements 4 so as to be relatively movable. For example, the track rail 2 has a substantially rectangular cross section by various methods such as injection molding. It is formed in a shape. The track rail 2 may be curved.

  The material of the track rail 2 is not particularly limited as long as it is generally used as the track rail 2 of the linear motion rolling guide device, and a material that is easy to form and inexpensive is preferable. For example, lightweight and inexpensive materials such as synthetic resin, aluminum, non-ferrous metals other than aluminum, and sintered materials can be used.

  As shown in FIGS. 1 and 2, for example, a plurality of bolt insertion holes 21 penetrating from the upper surface to the lower surface are provided in the track rail 2 at a predetermined pitch. The track rail 2 is fixed to the fixed side of the apparatus, for example, by inserting bolts through these bolt insertion holes 21. The bolt insertion hole 21 is provided with a receiving recess for receiving the head of the bolt so as not to hinder the movement of the moving block 3. A positioning hole 22 is provided on the upper surface of the track rail 2.

  As shown in FIG. 3, for example, the track rail 2 usually has a lower surface as a fixed surface and both side surfaces as guide surfaces for linear motion guidance. A substantially V-shaped first mounting groove 23 that extends in the longitudinal direction and protrudes toward the opposite side surface is provided at a position on both sides facing each other and on the upper surface side from the center. . The innermost portion of the first mounting groove 23 is recessed in a concave shape in the facing side direction, and a mounting recess 24 is provided.

  The first plate 5 is mounted on the track rail 2 so as to cover the substantially rectangular outer peripheral surface (that is, both side surfaces and the upper surface) including the mounting recesses 24.

  The first plate 5 is loaded with Hertz stress and is made of a material having excellent mechanical strength because high mechanical strength is required. Examples of the material having excellent mechanical strength include a steel strip, and a metal plate of a cold rolled steel strip for springs having a Vickers hardness of HV500 to 550 is preferable. The first plate 5 is preferably a flexible thin plate, and the thickness thereof is not particularly limited and is not generally determined by a device using the linear motion rolling guide device of the present invention. 0.1 to 0.3 mm.

  As shown in FIGS. 1 to 4, the first plate 5 is formed in a substantially U shape with a flat plate-like base portion 51 and side portions 52, 52 provided integrally at both end portions of the base portion 51. Has been. The substantially U-shaped first plate 5 can be formed by, for example, pressing a flat metal thin plate.

  As shown in FIGS. 1 and 2, the base 51 is provided with a plurality of insertion holes 53 having the same shape as the bolt insertion holes 21 of the track rail 2 and spaced apart from each other by a predetermined pitch. The base 51 is provided with a positioning hole 54. The positioning hole 54 is aligned with the positioning hole 22 of the track rail 2, and the positioning pin 11 is inserted into the positioning holes 54 and 22, for example. By doing so, the first plate 5 is positioned such that the insertion hole 53 and the bolt insertion hole 21 of the track rail 2 are coaxial.

  The width of the base 51 (the length in the direction in which both side portions 52 and 52 face each other) is preferably equal to or larger than the width of the upper surface of the track rail 2 and slightly longer than the width.

  A substantially V-shaped first rolling element rolling groove 7 is formed on both side portions 52, 52. The first rolling element rolling groove 7 is bent to a side facing each other at a predetermined position from the base portion toward the tip end side of both side portions, and further bent to the opposite side to the bending direction in front thereof. The predetermined position is a position separated by a dimension (preferably a dimension slightly longer than the length) from the upper surface side end of the side surface of the track rail 2 to the end where the first mounting groove 23 is formed. Preferably there is.

  The length of the two V-shaped sides constituting the first rolling element rolling groove 7 is preferably slightly larger than the length of the two V-shaped sides forming the first mounting groove 23. In addition, the V-shaped angle forming the first rolling element rolling groove 7 may be the same as the V-shaped angle of the first mounting groove 23.

  The first plate 5 has a V-shaped curve that forms a curved portion of the base 51 and both side portions 52 and 52 and the first rolling element rolling groove 7 in order to adjust the elastic force (biasing force). Notches 55 and 56 may be provided in the part. The notches 55 and 56 may have any shape, and the number thereof may be one or two or more.

  The moving block 3 is formed in a substantially concave shape so that the inner surfaces of both side portions cover the upper side from the substantially central portion of the side surface of the track rail 2 when engaged with the track rail 2. That is, it is formed in a gate shape (substantially concave shape) so as to cover the upper surface and both side surfaces of the track rail 2 and to engage with the track rail 2. In other words, it is formed in a cross-sectional gate shape (substantially concave shape) composed of both leg portions covering both side surfaces of the track rail 2 and a joint portion rigidly connecting the both leg portions. In the following, the moving block 3 is a composite block composed of a block main body 30 constituting the moving block main body and end plates 31 and 31 having a direction changing path 32 for changing the direction of the rolling elements, and the block. The description will be divided into the case of an integrated block in which the main body 30 and the end plates 31 and 31 are integrated.

  First, the composite block will be described.

  The block body 30 constituting the composite block is formed by means such as injection molding. The material of the block main body 30 is not particularly limited as long as it is generally used as the block main body of the linear motion rolling guide device, and is preferably a material that is easy to form, lightweight, and inexpensive. For example, lightweight and inexpensive materials such as synthetic resin, aluminum, non-ferrous metals other than aluminum, and sintered materials can be used.

  The block main body 30 has an upper surface formed in a flat rectangular shape. Near the four corners of the upper surface, there are provided mounting holes 33 which are holes, bosses or female screw portions, and the moving block 3 is fixed to the moving portion side of the apparatus, for example, via these mounting holes 33.

  The inner surface of the leg portion 34 of the block main body 30 extends in the longitudinal direction at a position facing the first mounting groove 23 when engaged with the track rail 2 and toward the opposite side to the facing direction. A substantially V-shaped second mounting groove 35 protruding is provided. The innermost part of the second mounting groove 35 is provided with a mounting recess 36 that is recessed in the direction in which the groove 35 extends. The second mounting groove 35 and the first mounting groove 23 are formed in substantially the same shape.

  The second plate 6 is mounted on the block main body 30 so as to cover the substantially concave inner peripheral surface including the second mounting grooves 35, 35 included in the block main body 30. The substantially concave inner peripheral surface is an inner surface of both legs 34, 34 and an inner surface of the coupling portion (hereinafter, the inner surface of the coupling portion is also referred to as “concave plane 98”). .

  The end plate 31 is provided before and after the moving block 3 moves on the track rail 2. Like the moving block 3, both end portions covering both side surfaces of the track rail 2 and the upper surface of the track rail 2 are provided. It is formed in the shape of a cross-sectional gate type (substantially concave shape) composed of a coupling portion that covers. Such an end plate 31 is formed by means such as injection molding. The material of the end plate 31 is not particularly limited as long as it is generally used as an end plate of a linear motion rolling guide device, and is preferably a material that is easy to form, lightweight, and inexpensive. For example, lightweight and inexpensive materials such as synthetic resin, aluminum, non-ferrous metals other than aluminum, and sintered materials can be used.

  The end plate 31 is provided with a direction changing path 32 for changing the direction of the rolling element 4. In addition, when the end plate 31 is fixed to the block main body 30 with screws 12 or the like, the second plate 6 attached to the block main body 30 does not slide away from the block main body 30 in the longitudinal direction and is not detached. Is formed. For example, as shown in FIG. 10, the position of the inner surface of the leg portion of the end plate 31 related to the portion covering the track rail 2 and the position in the cross-sectional direction of the concave plane 99 are related to the portion covering the track rail 2. A step 93 is provided between the position of the end plate 31 and the position of the moving block 3 so as to protrude inward from the position of the inner surface of the leg portion of the moving block 3 and the concave plane 98 in the cross-sectional direction. It is preferable. Since the end plate 31 is provided before and after the moving block 3 in the direction of moving on the track rail 2, such a step 93 is also provided before and after that. Therefore, the second plate 6 mounted on the substantially concave inner peripheral surface of the moving block 3 is locked by the step 93 provided on the front and rear of the moving block 3, and is detached due to sliding movement in the longitudinal direction. Can be prevented. With this configuration, the end plate 31 functions to prevent the second plate 6 from coming off.

  Similar to the first plate 5, the second plate 6 is loaded with Hertz stress and is required to have high mechanical strength, and thus is formed of a material having excellent mechanical strength, such as a steel strip. For example, it is formed of a metal plate of a cold rolled steel strip for springs having a Vickers hardness of HV500 to 550.

  The second plate 6 is preferably a flexible thin plate, and the thickness thereof is not particularly limited and is not generally determined by a device using the linear motion rolling guide device of the present invention. 0.1 to 0.3 mm.

  As shown in FIGS. 1 to 3 and FIG. 5, the second plate 6 is substantially U-shaped with a flat plate-like base portion 61 and side portions 62 and 62 integrally provided at both end portions of the base portion 61. It is formed in a shape. For example, a flat metal plate is pressed to form a substantially U shape. The length of the second plate 6 (base 61) is preferably formed to be the same as the length of the block body 30. The width of the base portion 61 (the length in the direction in which both side portions 62 and 62 face each other) is preferably equal to or smaller than the width between the both side portions 62 and 62 facing the side surfaces of the substantially rectangular block main body 30, It is more preferable that it is formed with a slightly shorter dimension from the viewpoint of imparting elastic force (biasing force).

  A substantially V-shaped second rolling element rolling groove 8 is formed on both side portions 62, 62. The second rolling element rolling groove 8 is bent at a predetermined position from the base portion 61 toward the distal end side of the both side portions 62, 62 and is bent to the opposite side to the opposite side, and further to the front side opposite to the bending direction. Is bent. The predetermined position is a dimension (preferably less than or equal to the length from the end in the width direction of the inner bottom surface of the coupling portion of the block main body 30 to the end of the leg of the block main body 30 where the second mounting groove 35 is formed. It is preferably a position separated by a dimension slightly shorter than the length.

  The length of the two V-shaped sides forming the second rolling element rolling groove 8 is preferably slightly larger than the length of the two V-shaped sides forming the second mounting groove 35. In addition, the V-shaped angle forming the second rolling element rolling groove 8 may be the same as the V-shaped angle of the second mounting groove 35.

  The second plate 6 has a V-shaped curve that forms a curved portion of the base 61 and both side portions 62 and 62 and a second rolling element rolling groove 8 in order to adjust the elastic force (biasing force). Notches 65 and 66 may be provided in the part. The notches 65 and 66 may have any shape, and the number thereof may be one or two or more.

  As shown in FIGS. 2 and 3, the moving block 3 to which the second plate 6 is attached and the track rail 2 to which the first plate 5 is attached are engaged (attached) via a large number of rolling elements 4. Thus, the second rolling element rolling groove 8 and the first rolling element rolling groove 7 are arranged so as to face each other, and a load rolling element rolling path 9 is formed by these grooves 8 and 7.

  The moving block 3 is of an outer type, and both leg portions 34, 34 of the block body 30 are provided with unloaded rolling paths 38 that extend in the longitudinal direction and penetrate therethrough. The infinite circulation path 10 is configured such that the unloaded rolling path 38 and the loaded rolling element rolling path 9 are communicated with each other by the direction changing path 32 of the end plate 31.

  Next, the moving block 97 having an integrated block will be described.

  As shown in FIGS. 9 to 12, the moving block having the integrated block includes an integrated block main body 91 in which the block main body and the end plate described above are integrated, and no load on the rolling elements together with the integrated block main body 91. It is mainly comprised from the cover member 92 which forms the rolling path 10, and the 2nd plate 6 with which the inner side surface and concave plane of the integrated block main body 91 were mounted | worn, and comprised a rolling-element rolling surface.

  The integrated block main body 91 has a shape in which the block main body 30 and the end plates 31, 31 described above are integrated, and the leg portions 34 and 34 corresponding to the cross-section gate-shaped leg portions and the leg portions are formed. The coupling portion 100 is formed in a flat rectangular shape, and has concave planes 98 and 99 between the leg portions 34 and 34 and on the inner surface side of the coupling portion 100. The integrated block main body 91 is formed by means such as injection molding, for example, and the material for forming is a material that is easy to form, lightweight and inexpensive, like the block main body 30 of the composite block. It is preferable. For example, lightweight and inexpensive materials such as synthetic resin, aluminum, non-ferrous metals other than aluminum, and sintered materials can be used.

  A mounting hole 33 that is a hole, a boss, or a female screw portion is provided on the upper surface of the integrated block main body 91 at the same position as in the embodiment shown in FIG. It is attached to.

  In the integrated block main body 91, mounting holes 94 that are holes, bosses, or female screw portions are provided near the four corners of the flat surface portion 101 that forms the lower surface of the legs 34, 34 extending from both sides of the coupling portion 100. It is positioned with the mounting hole 95 of the lid member 92 and fixed to the integrated block main body 91.

  The position aspect of the inner surface of the leg portion 34 of the integrated block main body 91 that faces the first mounting groove 23 when engaged with the track rail 2 is the same as that of the block main body 30 in the composite block described above. This is omitted here. Further, the second plate 6 mounted on the inner surface of the integrated block main body 91 and the mounting mode thereof are also the same as those already described, and therefore the details thereof will be omitted below. In FIG. 10, reference numeral 35 is a second mounting groove, and reference numeral 36 is a mounting recess.

  In this integrated block main body 91, the substantially C-shaped groove formed in the flat surface portion 101 that forms the lower surface of the legs 34, 34 extending from both sides of the coupling portion 100 is formed between the unloaded rolling path 10 and the direction changing path 32 of the rolling elements. It constitutes a main part and constitutes a no-load rolling path 10 and a direction changing path 32 of rolling elements together with a lid member 92 described later. In the integrated block main body 91, the no-load rolling path 10 and the direction changing path 32 are integrally formed of, for example, a resin material. Reference numeral 96 denotes a protruding line portion that also functions as an auxiliary for positioning the lid member 92.

  The lid member 92 is provided as a lid that covers the substantially C-shaped groove provided in the integrated block main body 91, thereby configuring the unloaded rolling path 10 and the direction changing path 32 of the rolling elements together with the integrated block main body 91. In addition, it is provided to prevent the rolling elements from falling off.

  The lid member 92 is made of various materials, but is preferably a porous body made of a porous material, for example. As the porous material, a plastic porous material is preferably used, and the formed porous body is arbitrarily selected in characteristics such as its porosity so that the rolling element is lubricated appropriately. Since such a lid member contains lubricating oil, there is an effect that the rolling element 4 is directly supplied to the rolling element 4 by circulating in the endless circulation path 10 as the moving block 97 reciprocates.

  Such an integrated block main body 91 and the lid member 92 form an integrated moving block 97. The integrated moving block 97 is mounted so that the second plate 6 mounted on the concave inner surface of the gate-shaped cross section is not detached even if it slides in the relative movement direction of the moving block. Positioning means for locking both ends of the two plates 6 is formed.

  As the positioning means, for example, a step 93 formed on the concave plane of the integral moving block 97 is preferably used. The step 93 is a concave surface 98 of the moving block 97 that is deep in the direction of the concave portion (the direction from the flat portion 101 of the leg portion to the concave plane; the same applies hereinafter). The same applies hereinafter) and the concave plane 99 slightly shallower than the concave plane 98 in the concave direction. Although the dimension of the step is not particularly limited, it is necessary that the dimension be such that at least both ends of the second plate 6 to be mounted can be locked. For example, the length in the recess direction is 0.5 to 1. An example is about 5 mm. In addition, such a level | step difference is the same also in the level | step difference formed with the block main body 30 and the end plate 31 in the composite type | mold moving block mentioned above. The integrated moving block 97 is convenient because a moving block having steps of the same size can be manufactured by, for example, injection molding simply by designing a molding die in which such steps are formed.

  Therefore, the second plate 6 mounted on the substantially concave inner peripheral surface side of the moving block 97 is locked by the step 93 provided before and after the moving block 97, and its longitudinal direction (that is, the moving block and the track rail). Can be prevented from detaching due to sliding movement in the relative movement direction.

  9 and 10 show a mode in which a step 93 that is uniformly extended at the same height is provided. However, such a mode may not be used. For example, a projection having a predetermined step is provided. It may be provided at a predetermined interval, or may be a mode in which cuts (slits) or the like are provided at steps extending at a predetermined height. In short, it is only necessary that the step that can lock the second plate 6 is formed of any shape, such as a molding resin.

  In the above-described aspect, the linear motion rolling guide device is constituted by the substantially rectangular track rail and the substantially concave moving block, so that the step 93 serving as the positioning means is included in the moving block 97 having the substantially concave shape. It is formed on the peripheral surface and engages both ends of the second plate 6 in the relative motion direction, but when a linear motion rolling guide device is configured with a substantially rectangular moving block and a substantially concave track rail, A step as a positioning means is formed on the outer peripheral surface of the movement block 97 having a substantially rectangular shape, and both ends of the first plate in the relative motion direction are locked.

  As described above, in the linear motion rolling guide device of the present invention, the moving block 3 and the track rail 2 are formed of a light and inexpensive material, and the first rolling element rolling groove 7 and the second rolling element rolling. Since only the groove 8 is formed of a material having a high mechanical strength, the entire apparatus 1 can be reduced in weight, can cope with a higher speed, and is further inexpensive. That is, the moving block 3 (the block main body 30, the end plates 31, 31 and the integrated block 91) is made of synthetic resin, aluminum, non-ferrous metal other than aluminum, sintered material, etc., so the moving block 3 is lightweight. Thus, the rising time when the moving block 3 is operated can be shortened or the inertial force at the time of stopping can be reduced, which is optimal when the reciprocating motion is repeated at high speed.

  Further, according to the linear motion rolling guide device of the present invention, the first rolling element of the metal plate having excellent mechanical strength can be obtained simply by mounting the first plate 5 and the second plate 6 to the track rail 2 and the moving block 3. Since the rolling groove 7 and the second rolling element rolling groove 8 are formed and the load rolling element rolling path 9 is configured by both, the assembling workability is improved. That is, since the first rolling element rolling grooves 7 and 7 are formed on both side portions 52 and 52 of the first plate 5, it is only one work to mount the first plate 5 on the track rail 2. The first rolling element rolling grooves 7 and 7 can be formed on both side surfaces of the track rail 2, and as a result, the assembly workability is improved.

  In the linear motion rolling guide device of the present invention, when the first plate 5 is mounted on the track rail 2, it may be mounted by sliding while overlapping the first plate 5 and the track rail 2 in close contact. It is preferable to mount in the following manner.

  That is, since the first plate 5 is formed of a flexible metal plate, the upper surface of the track rail 2 and the openings between the side portions 52 and 52 of the first plate 5 are brought together to meet the first plate. 5 is moved to the track rail 2 side. When the inner surfaces of both side portions 52, 52 of the first plate 5 are in contact with both side end portions of the upper surface of the track rail 2, the base portion 51 of the first plate 5 is pressed toward the track rail 2 side. Thereby, the both side parts 52 and 52 of the 1st plate 5 are elastically deformed toward the outer side from the position which touches the substantially rectangular track rail 2. When the substantially V-shaped protrusions forming the first rolling element rolling groove 7 reach the first mounting grooves 23, 23 on both side surfaces of the track rail 2 at both side parts 52, 52 of the first plate 5. The first plate 5 is mounted on the track rail 2 by being inserted into the first mounting grooves 23 and 23 so as to return to the original shape by the elastic force.

  As described above, according to the linear motion rolling guide device of the present invention, the first plate 5 is mounted using elastic deformation and restoration, so that assembly workability is improved. That is, since the first plate 5 can be mounted on the track rail 2 with a single touch by simply pressing the first plate 5 against the track rail 2, the mounting can be performed easily and quickly, and the number of assembly steps can be reduced. Can be reduced. Further, when the first plate 5 is mounted on the track rail 2, the substantially V-shaped protrusions forming the first rolling element rolling grooves 7, 7 on both side portions 52, 52 of the first plate 5 are Since it is positioned by being inserted into the first mounting grooves 23, 23 on both side surfaces of the two, mounting can be performed easily and accurately. Further, the first plate 5 can be mounted without detachment without using other means for preventing detachment. Therefore, the assembling work itself is simple and does not require skill, and the assembling work can be automated, and the manufacturing cost can be reduced.

  Moreover, since the 2nd rolling element rolling groove | channels 8 and 8 are formed in the both sides 62 and 62 of the 2nd plate 6, only one operation | work which mounts this 2nd plate 6 to the movement block 3, The second rolling element rolling grooves 8 and 8 can be formed on the inner surfaces of both the leg portions 34 and 34 of the moving block 3, and the assembling workability is improved.

  When the second plate 6 is mounted on the moving block 3, the second plate 6 and the moving block 3 may be slid while overlapping each other so as to be in close contact, but may be mounted as follows. preferable.

  That is, since the second plate 6 is formed of a flexible metal plate, the mounting between the legs 34, 34 of the moving block 3 and the outer surface of the base 61 of the second plate 6 is performed. And the second plate 6 is moved to the moving block 3 side. A base portion 61 of the second plate 6 is mounted between the leg portions 34 of the moving block 3, and a substantially V-shaped protrusion that forms the second rolling element rolling groove 8 of the second plate 6 and the moving block 3. When the leading edge portions of the inner surfaces of both legs 34 and 34 are in contact, the inner surface of the base 61 of the second plate 6 is pressed inward in the moving block 3. Thereby, the both side parts 62 and 62 of the 2nd plate 6 are elastically deformed toward an inner side from the position which contact | connects the substantially concave shaped movement block 3. FIG. The substantially V-shaped protrusions forming the second rolling element rolling grooves 8 and 8 on both side portions 62 and 62 of the second plate 6 are the second mounting grooves on the inner surfaces of both the leg portions 34 and 34 of the moving block 3. When reaching 35, 35, the second plate 6 is mounted on the moving block 3 by being inserted into the second mounting grooves 35, 35 in an attempt to return to the original shape by elastic force (biasing force).

  Thus, according to the linear motion rolling guide device of the present invention, since the second plate 6 is mounted using elastic deformation and restoration, the assembly workability is improved. That is, the second plate 6 can be attached to the track rail 2 with a single touch by simply pressing the second plate 6 against the moving block 3. As a result, mounting can be performed easily and quickly, and the number of assembly steps can be reduced. Further, when the second plate 6 is mounted on the moving block 3, the substantially V-shaped protrusions that form the second rolling element rolling grooves 8 and 8 on both side portions 62 and 62 of the second plate 6 are formed on the moving block. Since it is inserted and positioned in the 2nd mounting grooves 35 and 35 of the inner surface of both the leg parts 34 and 34, mounting | wearing can be performed easily and correctly.

  Further, according to the linear motion rolling guide device of the present invention, in the composite moving block 3 composed of the block main body 30 and the end plate 31, the second plate 6 to be mounted is attached with the end plate 31. Due to the formed step, the second plate 6 to be mounted in the moving block 97 having the integrated block 91 is formed on the integrated block main body 91 even when sliding in the longitudinal direction. It is positioned by the step 93 and does not leave. Therefore, since the second plate 6 mounted on the moving blocks 3 and 97 is positioned in both the vertical and horizontal directions, the mounting can be performed easily and accurately.

  Further, the second plate 6 can be mounted without being detached without using other means for preventing separation. Therefore, the assembling work itself is simple and does not require skill, and the assembling work can be automated, and the manufacturing cost can be reduced.

  In addition, since the first plate 5 and the second plate 6 have flexibility, even if a dimensional error occurs, the first plate 5 and the second plate 6 are deformed and eliminated by contact with the rolling elements 4 or the like. As a result, the first plate 5 and the second plate 6 do not require precise processing accuracy, and can be easily manufactured at low cost.

  In addition, the first rolling element rolling groove 7 and the second rolling element rolling groove 8 that form the loaded rolling element rolling path 9 along which the rolling element 4 moves are formed in a substantially V shape so that the rolling element 4 has four. Since the contact is made at a point, the rolling element 4 easily rolls (is easy to move) on the load rolling element rolling path 9, and the moving block 3 reciprocates along the track rail 2 more smoothly.

  Since the first mounting groove 23 and the second mounting groove 35 are provided with mounting recesses 24 and 36, respectively, the first mounting groove 23 and the second mounting groove 35 are provided with a first V-shaped first rolling groove. When the first plate 5 and the second plate 6 provided with the moving body rolling groove 7 and the second rolling body rolling groove 8 are mounted, the bent portion forming the V shape is in the space of the mounting recesses 24 and 36. Is inserted with a slight margin. For this reason, the rolling element 4 contacts the first plate 5 and the second plate 6, and as a result, the first plate 5 and the second plate 6 are loaded to the back of the first mounting groove 23 and the second mounting groove 35. Even when applied, the bent portion does not contact the bottom portions of the mounting recesses 24 and 36. Therefore, there is no worry that the bent part is broken due to a load.

  In the above-mentioned linear motion rolling guide device, the first plate 5 is formed so as to cover the upper surface and both side surfaces of the substantially rectangular track rail 2, but two or more pairs of first rolling element rolling grooves are provided. If the pair of first rolling element rolling grooves 7 are not provided on the upper surface of the track rail 2 on the side facing the substantially concave moving block 3, as shown in FIG. In addition, the first plate 70 is formed in a substantially U shape covering the lower surface and both side surfaces of the substantially rectangular track rail 2, and the first rolling element rolling grooves 7, 7 are formed in both side portions 71, 71. Then, it may be mounted on the track rail 2.

  In the linear motion rolling guide device described above, the track rail 2 is formed in a substantially rectangular shape and the moving block 3 is formed in a substantially concave shape. However, as shown in FIG. The inner block type may be formed by forming the moving block 81 in a substantially rectangular shape while forming it in a substantially concave shape. In this case, the first plate 82 is formed in a substantially U shape so as to cover both side surfaces and the lower surface of the substantially rectangular moving block 81, and is fixed by the positioning pins 11, and the second plate 83 is approximately It may be formed in a substantially U shape so as to cover the inner surface of the concave track rail 80 and fixed by the positioning pin 11.

  Further, for example, as shown in FIG. 8, a large number of spherical rolling elements 4 are loosely fitted to a plate-like retainer 90 extending along the diameter thereof, and this is inserted into the first rolling element rolling groove 7 and the second rolling element. It may be arranged in a loaded rolling element rolling path composed of the rolling grooves 8 so that the substantially rectangular moving block 81 is reciprocated along the substantially concave track rail 80. In this case, there is no need to provide a circulation path for circulating the rolling elements 4 in the moving block 81.

  In addition, it is a case where two or more pairs of 1st rolling-element rolling grooves 7 are provided in the substantially rectangular shaped movement block 81, Comprising: Of those, the movement block 81 lower surface of the side facing the substantially concave track rail 80 includes When the pair of first rolling element rolling grooves 7 are not provided, the first plate 82 is formed in a substantially U-shape that covers the upper surface and both side surfaces of the substantially rectangular moving block 81 and is formed on both sides of the first plate 82. The first rolling element rolling grooves 7 and 7 may be formed and attached to the moving block 81.

It is a top view which shows an example of the linear motion rolling guide apparatus of this invention. It is a partial cross-sectional top view which shows an example of the linear motion rolling guide apparatus of this invention. It is a longitudinal cross-sectional view which shows an example of the linear motion rolling guide apparatus of this invention. It is a block diagram which shows an example of the 1st plate of this invention, (a) is a top view, (b) is a front view, (c) is a side view. It is a block diagram which shows an example of the 2nd plate of this invention, (a) is a top view, (b) is a front view, (c) is a side view. It is a longitudinal cross-sectional view which shows the other example of the linear motion rolling guide apparatus of this invention. It is a longitudinal cross-sectional view which shows the other example of the linear motion rolling guide apparatus of this invention. It is a longitudinal cross-sectional view which shows the other example of the linear motion rolling guide apparatus of this invention. It is a top view which shows the block main body in the further another example of the linear motion rolling guide apparatus of this invention. It is AA sectional drawing in FIG. It is the top view (A) and side view (B) which show the cover member in the further another example of the linear motion rolling guide apparatus of this invention. It is sectional drawing from the BB cross-section direction in FIG. 9 about another example of the linear motion rolling guide apparatus of this invention.

Explanation of symbols

1 Linear motion rolling guide device 2 Track rail (track member)
3 Moving block (moving member)
DESCRIPTION OF SYMBOLS 4 Rolling element 5 1st plate 6 2nd plate 7 1st rolling element rolling groove 8 2nd rolling element rolling groove 9 Load rolling element rolling path 10 Infinite circulation path 11 Positioning pin 12 Screw 21 Bolt insertion hole 22 Positioning hole 23 First mounting groove 24 Mounting recess 30 Block body 31 End plate 32 Direction change path 33 Mounting hole 34 Leg 35 Second mounting groove 36 Mounting recess 38 No-load rolling path 51 Base 52 Side 53 Insertion hole 54 Positioning hole 55, 56 Notch 61 Base 62 Sides 65, 66 Notch 70 First plate 71 Side 80 Track rail 81 Moving block 82 First rate 83 Second plate 90 Retainer 91 Integrated block body 92 Lid member 93 Step 94, 95 Mounting hole 96 Convex section 97 Linear motion rolling guide device 98, 99 Concave plane 100 Coupling section 101 Plane section

Claims (4)

The track member and the moving member are engaged with each other in a freely movable manner via a rolling element that circulates in an infinite circuit including a load rolling element rolling path between the track member and the moving member.
One member of the track member and the moving member has a substantially rectangular cross section relative to the relative motion direction, and has at least a pair of first rolling element rolling grooves, and has a substantially rectangular outer periphery. A substantially U-shaped first plate mounted so as to cover the surface, and / or
The other member of the track member and the moving member has a substantially concave cross section perpendicular to the relative motion direction, and at least a pair of second rolling elements provided at positions opposed to the first rolling element rolling grooves. A linear motion rolling guide device comprising a substantially U-shaped second plate that has a moving body rolling groove and is mounted so as to cover the substantially concave inner peripheral surface of the other member.
The load rolling element rolling path is a rolling path composed of the first rolling element rolling groove and the second rolling element rolling groove, or the first rolling element rolling groove or the second rolling element rolling groove. And a rolling path composed of a rolling member rolling groove formed on the track member or the moving member, and a linear motion rolling guide device. The first plate is a flexible thin plate having the substantially V-shaped first rolling element rolling groove in which a groove protrudes toward the opposite side portions, and has a substantially rectangular shape including the first plate. The member has a first mounting groove that is positioned by inserting and inserting the substantially V-shaped first rolling element rolling groove portion at a position opposite to the substantially rectangular outer peripheral surface,
The second plate is a flexible thin plate having the substantially rolling V-shaped second rolling element rolling groove that protrudes on the opposite side to the opposing side portions, and has a substantially concave shape including the second plate. 2. The member according to claim 1, wherein the member has a second mounting groove at which the substantially V-shaped second rolling element rolling groove portion is inserted and positioned at a position opposed to the substantially concave inner peripheral surface. The linear motion rolling guide described.   Positioning means for locking both ends of the first plate in the relative motion direction or both ends of the second plate in the relative motion direction is formed on the substantially rectangular moving member or the substantially concave moving member. The linear motion rolling guide device according to claim 1 or 2, wherein the linear motion rolling guide device is provided.   4. The linear motion rolling guide device according to claim 3, wherein the positioning means is a step formed on an outer peripheral surface of the substantially rectangular moving member or an inner peripheral surface of the substantially concave moving member. .

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