WO2009093479A1

WO2009093479A1 - Rolling guide device and method of adjusting rolling guide device

Info

Publication number: WO2009093479A1
Application number: PCT/JP2009/050016
Authority: WO
Inventors: Takeki Shirai
Original assignee: Thk Co., Ltd.
Priority date: 2008-01-23
Filing date: 2009-01-06
Publication date: 2009-07-30
Also published as: JPWO2009093479A1; JP5325798B2

Abstract

A rolling guide device having good vibration damping characteristics. The rolling guide device has a track member (1) having lines of rolling body rolling surfaces (1b), a movable member (2) having lines of loaded rolling body rolling surfaces (4d) corresponding to the rolling body rolling surfaces (1b) and relatively movably mounted to the track member (1), and a plurality of rolling bodies (3, ...) arranged and received between the rolling body rolling surfaces (1b) and the loaded rolling body rolling surfaces (4d) and circulating in response to movement of the movable member (2) relative to the track member (1). In the rolling guide device, the diameter (Da) of rolling bodies (3a) rolling on one rolling body rolling surface and the diameter (Db) of rolling bodies (3b) rolling on the other rolling body rolling surface are adapted to be changeable, and this enables the gap (e1) between facing surfaces of the track member (1) and the movable member (2) to be changed.

Description

Rolling guide device and method for adjusting rolling guide device

The present invention relates to a rolling guide device and a method for adjusting the rolling guide device, and in particular, a rolling guide device having excellent damping characteristics by making it possible to adjust the gap between opposing surfaces of a track member and a moving member in units of microns. It is related to the technology that made it possible to provide

For example, conventionally used machine elements include rolling guide devices such as linear guides, ball screws, linear motion bearings, ball splines, and rotary bearings. Such a rolling guide device has a rolling member circulation surface including a rolling member rolling surface corresponding to the rolling member rolling surface and a loaded rolling member rolling surface corresponding to the rolling member rolling surface, and is assembled to the race member so as to be relatively movable. The moving member includes a plurality of rolling elements that are arranged and accommodated in the rolling element circulation path and circulate in accordance with the relative movement of the moving member with respect to the race member, so that the move member is in the axial direction or the circumference of the race member. It is a device that can be reciprocated or rotated freely in the direction.

In this type of rolling guide device, in recent years, there has been a demand for further improvement in guidance accuracy, and improvement proposals have been made to improve various characteristics. For example, the following Patent Document 1 discloses a technique for improving the damping characteristic, and specifically, a configuration in which a unit called a slider that performs a damping action is disposed between two moving members. It is what you have. And this unit has an outer shape substantially the same as the two moving members, and can form an oil film by providing a buffer gap between the inner surface of the unit and the guide rail that is the raceway member. It is said that it can exhibit a high vibration damping effect.

JP-A-2-279243

However, the rolling guide device disclosed in Patent Document 1 is provided with the slider that controls vibration separately from the moving member that directly receives external vibration because it bears a load. Therefore, vibration suppression is not made directly and is not effective. In addition, the rolling guide device disclosed in Patent Document 1 adopts a unique configuration in which a unit is provided between two moving members, and since priority was given to improving the damping characteristics, This is a configuration that sacrifices the versatility of the device. In addition, since a member such as a unit that does not directly contribute to the guide movement must be added, it is disadvantageous in terms of manufacturing cost and operation cost. Furthermore, the buffer gap provided between the inner surface of the unit and the guide rail cannot be adjusted freely and with high accuracy after the device is mounted. It can be expected that there is a limit to the improvement in action.

As described above, there are various problems in the conventional technology, but it is a fact that a technology that satisfies the attenuation characteristics demanded by the recent industry has not yet been created. Therefore, the present invention has been made in view of the above-described problems, and an object of the present invention is to propose a new technique that can provide a rolling guide device having excellent damping characteristics.

The inventor who has recognized the above-mentioned problems of the prior art has come up with the idea that giving the moving member itself a vibration damping function can efficiently suppress vibration. Moreover, the idea that a rolling guide device having excellent damping characteristics could be realized by making the gap between the facing surfaces of the track member and the moving member adjustable in units of microns. To be specific, the invention can easily provide a rolling guide device having excellent damping characteristics that could not be realized in the past by the rolling guide device and the adjusting method of the rolling guide device having the following configurations and means. It came.

That is, the rolling guide device according to the present invention has a raceway member having a rolling element rolling surface and a loaded rolling element rolling surface corresponding to the rolling element rolling surface, and is assembled to the raceway member so as to be relatively movable. And a plurality of rolling elements that are arranged and accommodated between the rolling element rolling surface and the load rolling element rolling surface and circulate in accordance with the relative movement of the moving member with respect to the track member. In the rolling guide device, a plurality of rolling element rolling surfaces are formed, and the diameters of the rolling element rolling on one rolling element rolling surface and the rolling element rolling on another rolling element rolling surface are changed. By making it freely, the gap between the facing surfaces of the track member and the moving member can be adjusted, thereby solving the above-mentioned problem.

Further, in the rolling guide device according to the present invention, the rolling element rolling on the one rolling element rolling surface and the rolling element rolling on the other rolling element rolling surface have the same reference diameter. A rolling element that rolls on the rolling surface of the other rolling element when the diameter of the rolling element that rolls on the rolling surface of the rolling element is increased by a certain value from the reference diameter. The diameter can be reduced from the reference diameter by the same value as the increment.

Furthermore, in the rolling guide device according to the present invention, a plate-like body can be installed on the surface of the moving member facing the track member.

Furthermore, in the rolling guide device according to the present invention, a groove for holding a lubricant can be formed on one or both of the opposing surfaces of the track member and the moving member.

The method for adjusting a rolling guide device according to the present invention includes a raceway member having a rolling element rolling surface, a loaded rolling element rolling surface corresponding to the rolling element rolling surface, and is relatively movable with respect to the raceway member. A moving member to be assembled; and a plurality of rolling elements arranged and accommodated between the rolling element rolling surface and the load rolling element rolling surface and circulated along with the relative movement of the moving member with respect to the track member, A rolling guide device in which a plurality of rolling element rolling surfaces are formed, and a rolling guide device adjustment method used for adjusting a gap between opposing surfaces of the track member and the moving member, By changing the diameter of the rolling element that rolls on one rolling element rolling surface and the rolling element that rolls on another rolling element rolling surface, between the facing surfaces of the track member and the moving member It is characterized by adjusting the gap

Further, in the method for adjusting a rolling guide device according to the present invention, the rolling element rolling on the one rolling element rolling surface and the rolling element rolling on the other rolling element rolling surface have the same reference diameter. And rolling the other rolling element rolling surface when the diameter of the rolling element rolling on the rolling element rolling surface is increased by a certain value from the reference diameter. By making the diameter of the rolling element to be decreased from the reference diameter by the same value as the increase, the gap between the facing surfaces of the track member and the moving member can be adjusted. .

According to the present invention, since the moving member itself that receives the load has a vibration damping function, vibration applied from the outside can be extremely effectively suppressed. Furthermore, the gap between the facing surfaces of the raceway member and the moving member can be adjusted in units of microns simply by changing the dimensions of the rolling elements according to the use conditions, applications, required specifications, and the like. That is, since an appropriate gap can be easily and accurately adjusted under any circumstances, it is always possible to form an optimal oil film. Therefore, it is possible to easily realize a rolling guide device having excellent damping characteristics without impairing versatility.

Further, in the present invention, since a plate-like body having self-lubricating properties is installed on the surface of the moving member facing the track member, a suitable lubrication state between the moving member and the track member is constantly maintained stably. Is done. Thereby, it is possible to obtain a rolling guide device having high damping characteristics that could not be realized by the prior art. Moreover, since the said plate-shaped body is arrange | positioned appropriately between the opposing surfaces of a moving member and a track member, adjustment of the axial friction favorable for a guide motion will be made.

It is a figure which shows the linear motion guide apparatus as a rolling guide apparatus which concerns on this embodiment, and has shown especially the disassembled perspective view of a linear motion guide device. It is a diagram showing a linear motion guide device as a rolling guide device according to the present embodiment, in particular, a side view of the assembled linear motion guide device, and a longitudinal section in a direction orthogonal to the longitudinal direction of the track rail as a track member Show. It is the schematic longitudinal cross-sectional view which showed the principal part of the linear motion guide apparatus which concerns on this embodiment. It is a figure which shows the increase / decrease image of the diameter which can be changed with the roller which concerns on this embodiment. It is a figure which shows the increase / decrease image of the diameter which can be changed with the roller which concerns on this embodiment. It is an image figure for demonstrating the change condition of the gap dimension which arises when the diameter of an up-and-down roller is changed.

Explanation of symbols

1 track rail (track member), 1b roller rolling surface, 2 moving block (moving member), 3 roller, 4b loaded roller rolling surface, 11a, 12a, 13a, 20a guide groove, 25 plate.

Hereinafter, preferred embodiments for carrying out the present 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 embodiments are not necessarily essential to the solution means of the invention. .

1 and 2 are diagrams showing a linear motion guide device as a rolling guide device according to the present embodiment. In particular, FIG. 1 shows an exploded perspective view of the linear motion guide device, and FIG. 2 shows an assembled linear motion. The side view of the guide apparatus and the longitudinal cross-section of the direction orthogonal to the longitudinal direction of the track rail which is a track member are shown. The linear motion guide device includes a track rail 1 as a track member extending linearly, and a moving block 2 as a moving member assembled to the track rail 1 via a plurality of rollers 3 as rolling elements. And.

The track rail 1 is a member that has a substantially rectangular cross section and is elongated. On the left and right side surfaces of the track rail 1, grooves 1a having a substantially V-shaped cross section are formed along the longitudinal direction. As shown in FIG. 2, the groove 1a has

wall surfaces

1b and 1b and a bottom surface 1c. Both wall surfaces 1b and 1b of the groove 1a intersect at an angle of 90 degrees, and the upper wall surface 1b and the lower wall surface 1b function as

roller rolling surfaces

1b and 1b on which the rollers 3 roll, respectively. . On the left and right side surfaces of the track rail 1, a total of four

roller rolling surfaces

1b, 1b are provided, two on the top and bottom.

The moving block 2 includes a horizontal portion 2a facing the upper surface of the track rail 1, and

sleeve portions

2b and 2b extending downward from the left and right sides of the horizontal portion 2a and facing the left and right side surfaces of the track rail 1. A total of four roller circulation paths are formed in each of the left and

right sleeve portions

2b and 2b (see FIG. 2).

The roller circulation path will be described. As shown in FIG. 2, the upper and lower two load

roller rolling surfaces

4 d and 4 d are formed on the

sleeve portions

2 b and 2 b of the moving block 2. Between the loaded

roller rolling surfaces

4d, 4d and the

roller rolling surfaces

1b, 1b constitutes a load region of the roller circulation path.

Further, the

sleeve portions

2b, 2b are provided with two upper and lower

roller escape passages

7, 7 in parallel with the load

roller rolling surfaces

4d, 4d at a predetermined interval. The

roller escape passages

7 and 7 constitute a no-load region of the roller circulation path.

Further, the

sleeve portions

2b and 2b are provided with U-shaped direction change paths 8 and 8 that connect both ends of the loaded

roller rolling surfaces

4d and 4d and the

roller escape passages

7 and 7 and circulate the rollers 3. ing. The direction change paths 8 and 8 are three-dimensionally crossed between the upper loaded roller rolling surface 4b and the lower roller escape passage 7 and between the lower loaded roller rolling surface 4b and the upper roller escape passage 7. Connected. These direction change paths 8 and 8 also constitute a no-load region of the roller circulation path.

These load

roller rolling surfaces

4d and 4d, the pair of direction changing paths 8 and 8, and the

roller escape paths

7 and 7 constitute an annular roller circulation path. Each roller circulation path is formed in one plane, and the rollers 3 circulate two-dimensionally in each roller circulation path. The plane on which one roller circulation path is located is perpendicular to the plane on which the other roller circulation path is located. Moreover, one roller circulation path is arrange | positioned at the inner peripheral side of the other roller circulation path.

As shown in FIG. 1, the moving block 2 includes a steel block main body 4, resin circulation path molded

bodies

11, 12, 13, 15 a, 15 b, and 20 incorporated in the block main body 4, and a resin circulation path molded body 11. , 12, 13, 15a, 15b, 20 are provided with a pair of side lids 5, 5 attached to the end face of the block body 4. On the

sleeve portions

4 b and 4 b of the block body 4, projecting portions 4 c and 4 c are formed that match the shape of the groove 1 a provided on the side surface of the track rail 1. The protruding portions 4c and 4c are formed with two load

roller rolling surfaces

4d and 4d as load rolling element rolling portions corresponding to the

roller rolling surfaces

1b and 1b (see FIG. 2). A total of four load

roller rolling surfaces

4d and 4d are provided on the top and bottom of the left and

right sleeve portions

4b and 4b of the block body 4, respectively.

The resin circulation path molded body extends along both side edges of the load

roller rolling surfaces

4d, 4d, and when the moving block 2 is removed from the track rail 1, the rollers 3 ... drop off from the load

roller rolling surfaces

4d, 4d. Holding

members

11, 11, 12, 13, 13, escape

passage constituting members

14, 14 for returning the rollers 3, and inner circumference guide portion constituting member 15 a constituting the inner circumference guide portion of the direction changing path, 15a, 15b, 15b. Each of the holding

members

11, 11, 12, 12, 13, 13, the escape

passage constituting members

14, 14, and the pair of inner circumferential guide

portion constituting members

15 a, 15 a, 15 b, 15 b is separated from the block body 4. It is molded with resin and incorporated in the block body 4.

As shown in FIG. 2, the holding members are first holding

members

11 and 11 that hold the lower side of the lower rollers 3, the upper side of the lower rollers 3, and the lower side of the upper rollers 3. Are constituted by second holding

members

12 and 12 and third holding

members

13 and 13 holding the upper side of the upper rollers 3. These holding members exhibit a function as a rod for guiding the rollers 3 in the axial direction.

As shown in FIG. 1, the

first holding members

11, 11 are constituted by thin and long resin molded products. By incorporating the

first holding members

11, 11 into the block body 4, a guide groove 11 a (see FIG. 2) is formed as a guide portion for guiding a connecting belt of a roller retainer 10 described later. The

first holding members

11 and 11 are attached to the moving block 2 with both ends supported by being sandwiched between the pair of side lids 5 and 5.

The

second holding members

12 and 12 are made of a thin and long resin molded product. The

second holding members

12 and 12 are formed with

guide grooves

12a and 12a (see FIG. 2) as guide portions for guiding the connecting belt of the roller retainer 10 on both sides thereof. This 2nd holding member 12 is attached to the movement block 2 in the state by which both ends were supported by being pinched | interposed between a pair of inner peripheral guide part

structural members

15a and 15a.

The

third holding members

13 and 13 are made of thin and long resin molded products. By incorporating the

third holding members

13 and 13 into the block main body 4, a guide groove 13 a (see FIG. 2) is formed as a guide portion for guiding the connecting belt of the roller retainer 10. Similar to the

first holding members

11 and 11, the

third holding members

13 and 13 are attached to the moving block 2 with both ends supported by being sandwiched between the pair of side lids 5 and 5. .

The escape

passage constituting members

14 and 14 are constituted by

pipe halves

14a and 14b obtained by dividing the pipe into two in the rotation axis direction. Each of these

pipe halves

14a and 14b has a groove 20 that matches the shape of the rollers 3 along the longitudinal direction, and a guide groove 20a (see FIG. 2) that serves as a guide for guiding the connecting belt of the roller retainer 10. , And a flange 19 extending in the longitudinal direction along both side edges of the groove. The escape

passage constituting members

14 and 14 form the

roller escape passages

7 and 7.

The inner periphery guide

part constituting members

15 a and 15 b are divided into two in the longitudinal direction of the track rail 1. When the two inner periphery guide

part constituting members

15a and 15b are combined, a U-shaped direction change path that is three-dimensionally crossed is formed. In addition, a guide groove as a guide portion for guiding the connecting belt of the roller retainer 10 is formed in the direction change path. An inner peripheral guide portion 21 of an inner peripheral roller circulation path is formed on the movable block 2 side (inner side) divided body 15a. The inner peripheral guide portion 21 is formed in a substantially semicircular arc shape. An outer peripheral guide portion 31 of the inner peripheral roller circulation path and an inner peripheral guide portion 32 of the outer peripheral roller circulation path are formed on the side cover side (outer) divided body 15b. The inner peripheral guide portion 32 and the outer peripheral guide portion 31 are formed in a substantially semicircular arc shape.

The side lids 5 and 5 have a cross-sectional shape that matches that of the block body 4 and are provided with a horizontal portion 5a and a pair of left and

right sleeve portions

5b and 5b. The

sleeve portions

5b, 5b are formed with outer

peripheral guide portions

36, 36 of the roller circulation path on the outer peripheral side. Further, the combined inner periphery guide

portion constituting members

15a and 15b are fitted into the

sleeve portions

5b and 5b.

As shown in FIG. 1, the side lids 5 and 5 are attached to both ends of the block body 4. The side lids 5 and 5 are fastened and fixed to the block body 4 by inserting bolts into the bolt insertion holes formed in the side lids 5 and 5 and screwing the bolts into the screw holes formed on the end surface of the block body 4. . Thereby, the inner peripheral guide

portion constituting members

15 a and 15 b are fixed to the block main body 4. Note that decorative plates 38 are attached to the outside of the side lids 5 and 5.

The linear motion guide device according to the present embodiment has the basic configuration as described above, but as a further significant feature, there are two (circular) roller circulation paths formed on the side surface of the track rail 1. Among them, the diameters of the rollers 3 circulating through the roller circulation path positioned above and the rollers 3 circulating through the roller circulation path positioned below can be changed freely. . In other words, the roller circulation path according to the present embodiment has a dimension in which the no-load region is larger than the diameter of the reference roller so that the rollers 3 with various types of diameters can be circulated. It is formed in a circulation path. By adopting such a configuration, in the linear motion guide device according to the present embodiment, the gap between the facing surfaces of the track rail 1 and the moving block 2 can be adjusted. Therefore, a specific configuration and operational effects of such significant features will be described next with reference to FIGS.

FIG. 3 is a schematic longitudinal sectional view showing a main part of the linear motion guide apparatus according to the present embodiment. FIG. 4 and FIG. 5 are diagrams showing an increase / decrease image of the diameter that can be changed by the roller according to the present embodiment. Further, FIG. 6 is an image diagram for explaining a change state of a gap dimension that occurs when the diameters of the upper and lower rollers are changed.

In FIG. 3, a roller 3a that circulates in an upper roller circulation path and a roller 3b that circulates in a lower roller circulation path are both constituted by a roller rolling surface 1b and a load roller rolling surface 4d. The state located in the load area | region of the roller circulation path made is drawn. In the state shown in FIG. 3, the upper and

lower rollers

3a and 3b have the same dimensions, and the diameters of the

rollers

3a and 3b at this time can be shown as reference diameters Da and Db (that is, Da = Db). Further, if the

rollers

3a, 3b have standard diameter Da, the Db, clearance between the opposing surfaces of the track rail 1 and the moving block 2 has a e _1.

At this time, for example, the diameter of the upper roller 3a is changed to a value (Da + Δd) slightly increased from the reference diameter by a certain value Δd, and the diameter of the lower roller 3b is changed from the reference diameter by the same value Δd as the increase. When it is changed to a finely reduced one (Da−Δd), the gap dimension e ₁ between the facing surfaces of the track rail 1 and the moving block 2 becomes e ₁ −Δe, and the gap is reduced by a certain amount. .

Further, when the diameter of the upper roller 3a is increased to Da + 2Δd and the diameter of the lower roller 3b is decreased by the same amount to Da-2Δd, the gap size is naturally further reduced to e ₁ −2Δe. It becomes.

Conversely, when the diameter of the upper roller 3a is decreased and the diameter of the lower roller 3b is increased, the gap between the facing surfaces of the track rail 1 and the moving block 2 is increased contrary to the above. It becomes.

As described above, the clearance between the facing surfaces of the track rail 1 and the moving block 2 is adjusted to a predetermined target value by increasing / decreasing the diameters of the upper roller 3a and the lower roller 3b. It becomes possible to do. In the case of the linear motion guide device according to the present embodiment, since each roller circulation path is formed on the side surface of the track rail 1, the amount of increase / decrease in the diameter of each

roller

3a, 3b must be the same value. Don't be. That is, the sum of the diameters of the two

rollers

3a and 3b must always be the same value. If this condition is not satisfied, the

rollers

3a and 3b are not properly installed between the track rail 1 and the moving block 2, so that preload is not properly applied to the

rollers

3a and 3b. For example, this may cause trouble in performing a suitable guide movement.

In addition, Table 1 shown below illustrates the amount of change in the gap dimension when the diameters of the roller 3a located above and the roller 3b located below are increased or decreased. As shown in this table, it is clear that when the diameter of each

roller

3a, 3b is increased or decreased in units of 1 μm, the gap size is also increased or decreased in units of several μm. This fact indicates that the gap between the facing surfaces of the track rail 1 and the moving block 2 can be adjusted in units of micron, and by performing such precise adjustment, a suitable oil film can always be formed. Indicates that it will be possible. Therefore, it is possible to easily realize a linear motion guide device having excellent damping characteristics by the invention found by the present inventors, in which the gap size is adjusted by changing the roller diameter.

Here, the reason why it is possible to obtain a linear motion guide device having excellent damping characteristics by adjusting the gap between the facing surfaces of the track rail 1 and the moving block 2 in units of microns will be described. The following formula is a performance evaluation formula when the linear motion guide device is regarded as a damping unit. As is clear from the following formula, it is very important to control parameters such as gap size, area, and viscosity, that is, to finely adjust the oil film thickness, in order to improve the effect of viscous damping. I understand. Therefore, the invention found by the present inventor to finely adjust the gap size by changing the roller diameter is epoch-making in realizing a linear motion guide device with excellent damping characteristics. it is obvious.

By the way, in the linear motion guide apparatus according to this embodiment described above, the accuracy of the diameter that each

roller

3a, 3b can take is intended to be the target dimension in design, and each roller shown in this embodiment The amount of change in the diameters of 3a and 3b is clearly different from the amount of error inevitably included in manufacturing. Therefore, even if a slight deviation due to processing error or the like is included, the product is naturally included in the technical scope of the present invention as long as it is manufactured based on the technical idea of the present invention. It is.

Furthermore, in the linear motion guide apparatus according to the present embodiment, as shown in FIG. 3, a plate-like body 25 having self-lubricating properties is installed on the surface of the moving block 2 facing the track rail 1. For this plate-like body 25, for example, a resin material called Turkite (registered trademark) with low friction and excellent wear resistance is preferably used, and a gap between the facing surfaces of the track rail 1 and the moving block 2 is suitable. In addition, the Turkite (registered trademark) and the oil film are simultaneously present to facilitate the operation of the moving block 2 due to the synergistic effect thereof. In addition, because Turkite (registered trademark) has self-lubricating properties, even if the supply of lubricating oil is interrupted, the Turkite (registered trademark) will continue to operate the moving block 2 smoothly for a while, thereby ensuring safety. Improvement of maintainability and maintainability.

However, since the plate-like body 25 is basically assumed not to come into contact with the track rail 1, it does not necessarily have to have self-lubricating properties. Therefore, the plate-like body 25 may be made of other materials such as a casting.

Further, the plate-like body 25 such as Turkite (registered trademark) is a member that is installed so as to occupy almost the entire area of the facing surface of the track rail 1 and the moving block 2, so that the axial friction adjustment that is favorable for the guide motion is performed. Thus, the smooth operation of the moving block 2 is realized also by this action.

Furthermore, as means for suitably holding the lubricating oil in the gap between the facing surfaces of the track rail 1 and the moving block 2, either one or both of the facing surfaces of the track rail 1 and the moving block 2 can be used. It is also preferable to form a groove for holding the lubricating oil. Since such a groove functions as an oil groove for holding the lubricating oil, even if the moving block 2 repeats a reciprocating motion with a large frequency, an appropriate supply of the lubricating oil is maintained.

Furthermore, a lubricating oil holding means (not shown) is provided between the facing surfaces of the track rail 1 and the moving block 2 as means for suitably holding the lubricating oil in the gap between the facing surfaces of the track rail 1 and the moving block 2. Is also suitable. The lubricating oil retaining means may be in any form as long as it has a function of preventing the lubricating oil retained between the opposing surfaces from flowing out to the outside. For example, a known oil seal technique is applied. Can do.

The preferred embodiments of the present invention have been described above, but the technical scope of the present invention is not limited to the scope described in the above embodiments. Various modifications or improvements can be added to the embodiment.

For example, as shown in FIG. 3, the linear motion guide device according to the present embodiment described above includes the contact angle line α of the roller 3a circulating in the upper roller circulation path and the roller 3b circulating in the lower roller circulation path. The extension line with the contact angle line β extends toward the track rail 1 and intersects at the intersection point P outside the track rail 1. Such a configuration is a so-called DB structure, and can have a particularly high rigidity against a moment. However, the present invention is not limited to the rolling guide device (linear motion guide device) having the DB structure as shown in FIG. 3, and the contact angle line of the roller circulating in one roller circulation path and the other Rolling with a so-called DF structure, in which the extension line with the contact angle line of the roller circulating in the roller circulation path extends toward the outside of the race member and intersects on the race member side The present invention can also be applied to a guide device (linear motion guide device). A rolling guide device (linear motion guide device) having a DF structure can exhibit particularly excellent alignment.

In the above-described embodiment, the case where all the roller circulation paths are formed on the side surface of the track rail 1 is described as an example. However, the scope of application of the present invention is not limited to such a form. A rolling guide device in which a roller circulation path is formed on the upper surface of the track rail 1 may be used. In this case, if only the diameter of the roller disposed on the upper surface of the track rail 1 is changed, the gap dimension between the facing surfaces of the track rail 1 and the moving block 2 can be adjusted. , It is not necessary to have the same amount of increase / decrease in diameter, and it is not necessary to have the same reference diameter.

In the above-described embodiment, the case where a roller is used as the rolling element has been described as an example. However, the present invention is also applicable to other rolling elements such as balls. For example, when a ball is applied to the rolling element, the change in the size of the ball can be performed in units of microns, so that the effects of the present invention can be exhibited.

Further, in the above-described embodiment, the

roller rolling surfaces

1b and 1b and the load

roller rolling surfaces

4d and 4d are formed in two on the right and left, for a total of four, but it is possible to exhibit the effects of the present invention. In terms of conditions, the number of strips and the arrangement position can be variously set.

In addition, in the above-described embodiment, a rolling element (roller or ball) train is circulated, that is, an infinite circulation type rolling guide device. However, the rolling element train does not circulate and performs only reciprocating rolling. The present invention can also be applied to so-called finite type rolling guide devices.

In the above-described embodiment, the case where the rolling elements whose diameters are to be increased or decreased has the same reference diameter has been described as an example, but the diameter of one rolling element is set larger than that of the other rolling element. The present invention can also be included in the present invention, and the one rolling element and the other rolling element according to the present invention are not limited to those having the same reference diameter.

Further, in the above-described embodiment, an oil film is provided between the upper surface of the track rail and the inner surface of the moving block opposite to the track rail. However, the oil film that forms the damping action is the situation such as the direction of the load received. According to the above, it may be between the appropriate surface of the track rail and the inner surface of the moving block facing this.

In the above-described embodiment, the rolling guide device using only the roller or only the ball is shown, but the rolling guide device using both the roller and the ball may be used.

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

Claims

A raceway member having a rolling element rolling surface;
A load member that has a load rolling element rolling surface corresponding to the rolling element rolling surface, and a movable member that is assembled to the raceway member so as to be relatively movable;
A plurality of rolling elements that are arranged and accommodated between the rolling element rolling surface and the load rolling element rolling surface and circulate together with the relative movement of the moving member with respect to the raceway member;
In a rolling guide device comprising:
A plurality of rolling element rolling surfaces are formed,
By making the diameters of the rolling elements rolling on one rolling element rolling surface and the rolling elements rolling on another rolling element rolling surface freely changeable, the facing surfaces of the track member and the moving member A rolling guide device characterized in that a gap between the two is adjustable.
The rolling guide device according to claim 1,
The rolling element rolling on the one rolling element rolling surface and the rolling element rolling on the other rolling element rolling surface have the same reference diameter,
When the diameter of the rolling element rolling on the rolling element rolling surface is increased by a certain value from the reference diameter, the diameter of the rolling element rolling on the other rolling element rolling surface is A rolling guide device configured to be reduced from the reference diameter by the same value as the increment.
The rolling guide device according to claim 1 or 2,
A rolling guide device in which a plate-like body is installed on a surface of the moving member facing the track member.
The rolling guide device according to any one of claims 1 to 3,
A rolling guide device in which a groove for holding a lubricant is formed on one or both of the opposing surfaces of the track member and the moving member.
A raceway member having a rolling element rolling surface;
A load member that has a load rolling element rolling surface corresponding to the rolling element rolling surface, and a movable member that is assembled to the raceway member so as to be relatively movable;
A plurality of rolling elements that are arranged and accommodated between the rolling element rolling surfaces and the load rolling element rolling surfaces and circulate in accordance with relative movement of the moving member with respect to the raceway member;
With
In the rolling guide device in which a plurality of rolling element rolling surfaces are formed, an adjustment method of the rolling guide device used for adjusting a gap between the facing surfaces of the raceway member and the moving member,
By changing the diameter of the rolling element that rolls on one rolling element rolling surface and the rolling element that rolls on another rolling element rolling surface, between the facing surfaces of the track member and the moving member A method for adjusting a rolling guide device, characterized by adjusting a gap.
In the adjustment method of the rolling guide apparatus of Claim 5,
The rolling element rolling on the one rolling element rolling surface and the rolling element rolling on the other rolling element rolling surface have the same reference diameter,
When the diameter of the rolling element rolling on the rolling element rolling surface is increased by a certain value from the reference diameter, the diameter of the rolling element rolling on the other rolling element rolling surface is A method for adjusting a rolling guide device, wherein a gap between opposing surfaces of the track member and the moving member is adjusted by reducing the reference diameter by the same value as the increment.