JP2554549Y2 - Linear guide mechanism - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a linear guide member having rail portions formed on both sides in the extending direction, a rotary body whose outer peripheral portion is fitted to the rail portion of the linear guide member, and a rotary body. Is attached to the mounting base member so that the rotating bodies form a pair and are fitted to the rails on both sides of the linear guide member, and the mounting base member extends along the linear guide member. And a movable linear guide mechanism.

[0002]

2. Description of the Related Art A linear guide mechanism of the above type is known, and a mechanism using a rotary bearing as a rotating body is also known. A linear guide mechanism of this type is disclosed in, for example, British Patent No. 681,412, and an example thereof is shown in FIGS. 8 and 9, 51 is a guide rail, 52 is a rotating body using a rotating bearing,
Reference numeral 53 denotes a mounting base plate that supports the rotating body 52. Rail sections 51 a having a V-shaped cross section are provided on both sides of the guide rail 51. The V-shaped groove 52a of the rotating body 52 formed by two bearings meshes with the rail portion 51a without any gap. This linear guide mechanism allows even if the width of the guide rail 51 varies, so as shown in FIG. 9, a support shaft 54 supporting the rotating body 52 on one side of the guide rail 51 is provided with an eccentric shaft. The rotating body 52 on one side thereof is configured to be adjustable in a direction in which the rotating body 52 comes into contact with and separates from the guide rail 51. Accordingly, the rotating body 52 is supported on one side by the adjustment journal and on the other side by the fixed journal.

[0003] The linear guide mechanism having the above structure has the following effects by using a rotary bearing. 1. Since the rotating body 52 is a rotating bearing, a very smooth guide mechanism without friction loss can be obtained. 2. Since the guide rail 51 and the rotating body 52 have no frictional contact or play between them, no noise is generated during the reciprocating movement. 3. Generally, the permissible rotational speed of the rotary bearing is high, and the reciprocating speed can be similarly increased. 4. By improving the accuracy of the guide rail 51 and giving a pressurization to the rotating body 52, the guide accuracy can be similarly improved. Thus, since the linear guide mechanism using the rotary bearing has the above-mentioned advantages, there is a great demand especially in recent years, and improvement of its quality is also desired.

[0004]

However, at the time of assembling the above-described linear guide mechanism, the four support shafts 54 of the fixed journal and the adjustment journal are processed to have the same dimensional accuracy. The distance between the bearings to be adjusted, in other words, the guide rail 51
If it is not possible to sufficiently adjust the fit between the rotary member 52 and the rotating body 52 and to fix the adjusting journal so that it does not rotate when a load is applied, the above-described rotary bearing is used. No effect. For example, if excessive pressurization is applied, the rotary body will be damaged or the guide rail will be worn out within a short period of time, making it unusable. For this reason, there has been a problem that anyone cannot easily assemble the above-described linear guide mechanism and must rely on a skilled person.

[0005] Further, the above-described linear guide mechanism includes a rotating body 5.
Since the component force of the load applied to 2 acts in the direction of expanding the bearing interval, there is also a problem that the rigidity of the guide mechanism is reduced.

The present invention solves the above-mentioned conventional problems,
It is an object of the present invention to provide a linear guide mechanism capable of improving the necessity of learning in assembling and improving rigidity.

[0007]

To achieve the above object, the present invention provides a linear guide member having rail portions formed on both sides in the extending direction, and an outer peripheral portion fitted to the rail portion of the linear guide member. A rotating body, and a mounting base member to which the rotating body is mounted. The rotating bodies are mounted on the mounting base member such that the rotating bodies form a pair and are fitted to the rails on both sides of the linear guide member. in the linear guide mechanism movable base member along a linear guide member, fixed to said mounting base member, said the case member accommodating portion opposite sides are opened in the linear guide member is formed, the casing member
A supporting shaft for supporting the rotating body accommodated in the accommodating portion;
The support is provided between the rotating body and the mounting base member.
Supported by a shaft and fitted into the housing of the case member.
And a regulating plate .

[0008]

Further, one of the case members is a reference case member attached to a predetermined position of the attachment base member, and the other is an adjustment member attached to the attachment base member so as to be adjustable and movable in a direction of coming into contact with and separating from the linear guide member. It is characterized by being a case member.

Further, a hole is formed at the bottom of the housing portion of the rotating body, a flange portion having the same diameter is provided at one end of the support shaft, and the flange portion of the support shaft is fitted into the hole. Thus, the support shaft and the case member are positioned.

[0011]

According to the above construction, the rotating body is accommodated in the accommodating portion of the case member fixed to the mounting base member, and is supported by the support shaft extending from the case member to the mounting base member. The need for learning can be improved, and the rigidity can be improved.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an exploded perspective view showing an example of the linear guide mechanism according to the present invention. In FIG. 1, reference numeral 1 denotes a guide rail as a linear guide member, and 2 denotes a rotating body composed of a rotary bearing such as a ball bearing and a needle bearing. On both sides in the extending direction of the guide rail 1, there are provided rail portions 1a which are formed into a V-shaped cross section for guiding the rotating body 2. The guide rail 1 is subjected to a hardening process or a grinding process according to the application. The material may be resin or metal according to the application. Required processing is performed.

The rotating body 2 uses two bearings, and a V formed by overlapping these bearings.
The groove 2a meshes with the rail portion 1a without any gap. In addition, the rotating body 2 has different types of bearings depending on the application and shape.
The shape and number may be selected, and the bearing itself may be used as the rotating body. Alternatively, a separately manufactured bearing case may be prepared outside the bearing case, and the bearing may be assembled into the rotating case.

Reference numeral 3 denotes a mounting base plate as a mounting base member, and the mounting base plate 3 is formed on a through hole 5 through which a support shaft 4 for supporting a rotating body passes, and the support shaft 4. A counterbore 7 for submerging a nut 6 for fixing the shaft using a male screw, or a female thread for fixing the male screw of the support shaft 4 as they are is provided. Further, a through hole 10 for passing a bolt 9 for fixing the case member 8 to the mounting base plate 3 and a counterbore (not shown) for sinking a head of the bolt 9 are formed. Further, a female screw or a mounting hole 11 for fixing a bolt or the like for connecting the present mechanism provided on the mounting base plate 3 or the case member 8 to another object is provided. The material of the mounting base plate 3 is resin, metal, or the like.
It may be processed by extrusion, drawing, or other machining.

The support shaft 4 has a diameter such that an intermediate shaft portion is inserted into the inner diameter of the rotating body 2 without backlash.
It is thick and processed to give the necessary strength. One end has a male screw like a bolt, and the other end has a size larger than the shaft and is large enough to fit the rotation of the rotating body 2. A flange portion 4a is formed. Further, as shown in FIG. 3, the support shaft 4 is provided with a plurality of holes 4b for use when fixing the support shaft 4 to the mounting base plate 3.
Instead of the plurality of holes 4b, various holes for tool engagement may be formed.

A recess 12 is formed in the case member 8 as a housing for housing the rotating body 2, and the side of the recess 12 facing the guide rail 1 is opened. This recess 12
Is larger than the diameter of the rotating body 2, and
6 is processed so as to be firmly inserted in the circumferential direction without rattling. Further, as shown in FIG. 2, a hole 13 is formed in the concave portion 12 so that the flange portion 4a of the support shaft 4 is fitted.
The hole 13 has the same size as the outer diameter of the flange portion 4a of the support shaft 4, and is machined so that the support shaft 4 is firmly fixed in the circumferential direction without rattling. Further, the case member 8 is subjected to female thread processing for fixing to the mounting base plate 3. Further, a hole 14 for inserting a seal 15 for dust prevention or the like is formed in the case member 8 on a surface facing the side surface of the guide rail. The material of the case member 8 is the same as the material of the mounting base plate 3, and may be a resin, a metal, or the like processed by molding, extrusion, drawing, or other mechanical processing.

A regulating plate 16 is provided between the rotating body 2 and the mounting base plate 3, and the regulating plate 16 has an outer diameter formed to be the same as the cross-sectional shape of the concave portion 12 of the case member 8, and A part of the peripheral surface is notched so as not to interfere with the guide rail 1. Further, as shown in FIG. 4 , the surface of the regulating plate 16 that faces the rotating body 2 in the thickness direction is pressed against the inner ring side of the rotating body 2, but a step 16 a is formed so as not to contact the outer ring side. The rotation of the rotating body 2 is not hindered by the step 16a. Also,
A through hole 16b through which the support shaft 4 passes is also formed in the regulating plate 16,
The through hole 16b has the same diameter as the shaft diameter of the support shaft 4 and is machined so that there is no gap.

[0018] configured assembly procedure of the linear guide Organization for each will be described. First, the support shaft 4 is connected to the hole 1 of the case member 8.
3 from below, the rotating body 2 and the regulating plate 16
Is fitted, the rotating body 2 is housed in the recess 12 of the case member 8, and the regulating plate 16 is fitted in the recess 12. And
After being inserted into the through hole 5 of the mounting base plate 3, it is tightened with the nut 6. Next, the case member 8 is fixed to the mounting base plate 3 with the bolts 9, and the V-groove 2 a of the rotating body 2 is fitted from the end of the guide rail 1 so as to mesh with the rail 1 a.

Thus, the linear guide mechanism can be easily assembled as shown in FIGS. 3 and 4, and can be easily connected to the apparatus and other members. In particular, since the support shaft 4 is provided at its end with a flange portion 4a that fits into the hole 13 without any gap, the support shaft 4 and the case member 8 are formed only by the fitting.
And the positioning of the rotating body 2 and the case member 8 is performed. Furthermore, since the structure for pressing against the mounting base plate 3 is made possible, the dimensional control of the rotating body supporting portion from the mounting base plate 3 can be easily performed, even though the dimensional control of the support shaft 4 and the case member 8 can be easily performed. And the accuracy is improved. Further, the fact that a hole is formed in the flange portion 4a of the support shaft 4 for fixing the support shaft 4 to the mounting base plate 3 is very effective in simplifying the assembly.

In the assembled linear guide mechanism, the flange of the support shaft 4 is formed at the lower end of the support shaft 4 even if a component force for pushing and expanding the support shaft 4 acts on the support shaft 4 via the rotating body 2. The portion 4 a is fitted to the case member 8, and is reliably transmitted to the case member 8 via the regulating plate 16 near the upper end, and the case member 8 is fixed to the mounting base plate 3. By providing the case member 8, a bending moment is not generated on the support shaft 4 even if a component force is applied to the support shaft 4 to spread the support shaft 4 to the outside of the guide rail 1 due to a load as in the related art. Absent. Further, the mounting base plate 3
In connection with the case member 8, the displacement is reduced to 0 by passing the support shaft 4 between the mounting base plate 3 and the regulating plate 16 or between the mounting base plate 3 and the case member 8 together with the bolt 9. It is possible to regulate. Thus, it is possible to prevent the interval between the rotating bodies 2 from changing due to a load or the like.

If the width of the guide rail 1 varies greatly or if the gap between the V-groove 2a of the rotating body 2 and the rail portion 1a is managed, one of the case members 8 is mounted at a predetermined position on the mounting base plate 3. This can be easily solved by using a reference case member to be used and an adjustment case member attached to the mounting base plate 3 so as to be adjustable and movable in a direction of coming into contact with and separating from the guide rail 1. In this case, in order to constitute the adjusting case member, the diameters of the through holes 5 and 10 for the one case member 8 of the mounting base plate 3 are only slightly larger than the shaft diameters of the support shaft 4 and the bolt 9 respectively. Only needs to be done.

In this adjustment, first, the reference case member 8 is fixed to the mounting base plate 3, and at this time, the support shaft 4 and the bolt 9 are fitted into the through holes 5 and 10 without any gap. The base plate 3 is fixed at a predetermined position.
Next, the adjustment case member 8 can be moved and adjusted in the direction of coming and going to the guide rail 1 by loosening the fixing of the support shaft 4 and the bolt 9 in advance. The V-groove 2a of the rotating body 2 may be brought into close contact with the rail portion 1a, the adjustment case member 8 may be pressed against the guide rail 1, and after the adjustment movement, the support shaft 4 and the bolt 9 may be tightened and fixed.

Thus, the gap between the V-groove 2a of the rotating body 2 and the rail portion 1a can be managed. The adjustment case member 8 is pressed against the guide rail 1 for this adjustment.
That is, the pressurization can be numerically managed by various measuring tools, tension gauges and the like. As a result, since it is possible to perform numerical management and assemble the parts by combining the members, there is no need for any skill in assembling and adjusting the linear guide mechanism. Also, each member does not require special processing, and it is certain that sufficient production can be achieved by standard production in large quantities, leading to integrated cost reduction.

In the present invention, the rotating body 2 and the guide rail 1 are meshed with the V-groove 2a and the rail portion 1a in the above embodiment, but the rotating body 2 and the guide rail 1 are shown in FIG. , (B), and (c), and the present invention can be applied to a guide rail 1 divided into two along the longitudinal direction as shown in FIG. In this case, the rotating body 2
6B, as shown in FIG. 6 (b), it may be configured to be supported by a box-shaped rotating bearing guide formed by the mounting base plate 3 and the case member 8.

If the width of the inner ring 2b is larger than the width of the outer ring 2c as the rotating body 2 as shown in FIG. 7, the regulating plate 16 does not need the step 16a. What is necessary is just to use a thing with a rotating body contact surface in a planar shape.

[0026]

According to the above construction, in the present invention, the rotating body is accommodated in the accommodating portion of the case member fixed to the mounting base member, and is supported by the support shaft extending from the case member to the mounting base member. Since the need for skill in assembling can be improved, and the rigidity has also been improved, deformation due to a component force such as spreading the rotating body to the outside of the guide rail due to a load and deterioration of the guiding accuracy due to the deformation can be prevented.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an example of a linear guide mechanism according to the present invention.

FIG. 2 is a plan view of a case member.

FIG. 3 is a bottom view of the linear guide mechanism after assembly.

FIG. 4 is a cross-sectional view of the linear guide mechanism after assembly.

FIGS. 5A, 5B, and 5C are explanatory views showing a rotating body and a guide rail applicable to the present invention, respectively.

6 (a) and 6 (b) are explanatory views showing a rotating body and a guide rail applicable to still another embodiment of the present invention.

FIG. 7 is a cross-sectional view illustrating a modified example of a rotating body and a regulating plate.

FIG. 8 is a sectional view of a conventional linear guide mechanism.

FIG. 9 is an exploded perspective view of a conventional linear guide mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide rail 2 Rotating body 3 Mounting base plate 4 Support shaft 4a Flange part 8 Case member 12 Depression 13 Hole 16 Regulation plate

Claims (3)

(57) [Scope of request for utility model registration] 1. A linear guide member having rail portions formed on both sides in an extending direction, a rotating body whose outer peripheral portion is fitted to the rail portion of the linear guide member, and a mounting base member to which the rotary body is attached. A linear guide that is attached to the mounting base member such that the rotating bodies form a pair and are fitted to the rail portions on both sides of the linear guide member, and the mounting base member is movable along the linear guide member. In the mechanism, a case member fixed to the mounting base member and formed with a housing portion whose side facing the linear guide member is opened , and the rotating body housed in the housing portion of the case member.
A supporting shaft, between the rotating body and the mounting base member;
And is supported on the support shaft, and the case member
And a regulating plate fitted into the receiving portion . 2. The linear guide mechanism according to claim 1 , wherein one of the case members is a reference case member attached to a predetermined position of the attachment base member, and the other is adjusted and moved in a direction to come into contact with and separate from the linear guide member. A linear guide mechanism, characterized in that the adjustment case member is attached to the attachment base member as much as possible. 3. A hole is formed at the bottom of the housing of the rotating body, and a flange having the same diameter is provided at one end of the support shaft.
By fitting the flange portion of the support shaft into the hole, the linear guide mechanism according to claim 1 or 2, characterized in that said support shaft and said casing member are positioned.