JPH0596547U - Straight guide mechanism - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To provide a linear guide mechanism that can improve the need for learning in assembly and increase rigidity. [Structure] When the support shaft 4 is inserted into the hole 13 of the case member 8 from below and the rotating body 2 and the regulating plate 16 are fitted into the supporting shaft 4, the rotating body 2 is housed in the recess 12 of the case member 8 and the regulating plate is formed. 1
6 is fitted in the recess 12. Through hole 5 in mounting base plate 3
After inserting, tighten the nut 6. The case member 8 is fixed to the mounting base plate 3 with the bolt 9, and the guide groove 1 is attached so that the V groove of the rotating body 2 is engaged with the rail portion 1a from the end portion of the guide rail 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is directed to a linear guide member having rail portions formed on both sides in the extending direction, a rotating body having an outer peripheral portion fitted to the rail portion of the linear guide member, and a mounting base to which the rotating body is attached. A linear member that is movable along the linear guide member and is mounted on 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. Regarding the guide mechanism.

[0002]

[Prior Art]

 The linear guide mechanism of the above type is known, and a mechanism using a rotary bearing as a rotating body is also known. This kind of linear guide mechanism is disclosed in, for example, British Patent No. 681,412, and an example thereof is shown in FIGS. 8 and 9. In FIGS. 8 and 9, 51 is a guide rail, 52 is a rotating body using a rotary bearing, 53 is a mounting base plate that supports the rotating body 52, and rail portions 51a having a V-shaped cross section are provided on both sides of the guide rail 51. It is provided. The V groove 52a of the rotating body 52 formed by two bearings meshes with the rail portion 51a without any gap. Since this linear guide mechanism allows the guide rail 51 to have variations in width, as shown in FIG. 9, the eccentric shaft 54 supporting the rotating body 52 on one side of the guide rail 51 is eccentric. The rotary body 52 on one side of the shaft is configured to be adjustable in the direction of contacting with and separating from the guide rail 51. Therefore, the rotating body 52 is supported on one side by the adjusting journal and on the other side by the fixed journal.

The linear guide mechanism thus constructed has the following effects by using a rotary bearing. 1. Since the rotary body 52 is a rotary bearing, there is no friction loss and a very smooth guide mechanism can be obtained. 2. Since the guide rail 51 and the rotating body 52 have no frictional contact or play between them, noise is not generated during the reciprocating motion. 3. Generally, the allowable rotational speed of the rotary bearing is high, and the reciprocating speed can be increased as well. 4. By improving the accuracy of the guide rail 51 and applying a pressure to the rotating body 52, the guiding accuracy can be improved as well. 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]

[Problems to be solved by the device]

 However, when the above linear guide mechanism is assembled, the four support shafts 54 of the fixed journal and the adjustment journal are machined to have the same dimensional accuracy, and the spacing between the bearings adjusted by the adjustment journal, In other words, if it is not possible to adjust the fit between the guide rail 51 and the rotary body 52 and fix the adjustment journal so that it will not rotate when a load is applied, The effect obtained by using the above rotary bearing cannot be obtained. For example, if excessive pressure is applied, it will become unusable due to damage to the rotor or wear of the guide rails within a short period of time. For this reason, there is a problem that the above-mentioned linear guide mechanism cannot be easily assembled by anyone and must rely on an expert.

Further, in the above-described linear guide mechanism, the component force of the load applied to the rotating body 52 acts in the direction of expanding the bearing gap, so that there is a problem that the rigidity of the guide mechanism becomes weak.

An object of the present invention is to provide a linear guide mechanism that solves the above-described conventional problems, improves the need for learning in assembly, and improves rigidity.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a linear guide member having rail portions formed on both sides in the extending direction, a rotating body having an outer peripheral portion fitted to the rail portion of the linear guide member, and the rotating member. And a mounting base member to which the body is mounted, and the rotating bodies are paired and mounted on the mounting base member so as to be fitted to the rails on both sides of the straight line inner member, and the mounting base member is linearly guided. In the linear guide mechanism movable along the member, a case member is provided, which is fixed to the mounting base member and has a housing portion having an opening on a side facing the linear guide member, and the rotating body is provided with the case member. It is characterized in that it is accommodated in the accommodating portion of the member and is supported by a spindle that extends from the case member to the mounting base member.

Further, a regulation plate is provided between the rotating body and the mounting base member, the regulation plate being supported by the support shaft and fitted in the housing portion of the case member.

Furthermore, one of the case members is a reference case member that is attached to a predetermined position of the attachment base member, and the other is an adjustment that is movably attached to the attachment base member in a direction toward and away from the linear guide member. It is characterized by being a case member.

Furthermore, a hole is formed in the bottom of the accommodating portion of the rotating body, a flange portion having the same diameter is provided in one end of the spindle, and the flange portion of the spindle is fitted into the hole. With this, the support shaft and the case member are positioned.

[0011]

[Action]

 According to the above configuration, the rotating body is housed in the housing portion of the case member fixed to the mounting base member, and is supported by the support shaft reaching the mounting base member from the case member. The need can be improved and the rigidity can be improved.

[0012]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an exploded perspective view showing an example of a linear guide mechanism according to the present invention. In FIG. 1, reference numeral 1 is a guide rail as a linear guide member, and 2 is a rotating body composed of a rotating bearing such as a ball bearing and a needle bearing. On both sides of the guide rail 1 in the extending direction, rail portions 1a for guiding the rotating body 2 are formed and processed into a V-shaped cross section. The guide rail 1 is hardened or ground according to the application, and the material may be resin or metal depending on the application. Necessary processing has been performed.

The rotating body 2 uses two bearings, and a V groove 2a formed by stacking the bearings meshes with the rail portion 1a without a gap. The rotating body 2 may use the bearing itself as a rotating body by selecting the type, shape and number of bearings according to the application and shape, and prepare a separately manufactured bearing case on the outside of the bearing. A bearing may be incorporated in the rotor to form a rotating body.

Reference numeral 3 is a mounting base plate as a mounting base member, and the mounting base plate 3 has a through hole 5 through which a supporting shaft 4 supporting a rotating body is inserted, and the supporting shaft 4 is processed. A counterbore 7 for sinking the nut 6 for fixing the shaft using a male screw or a female screw processing for fixing the male screw of the spindle 4 as it is. Further, a through hole 10 for inserting a bolt 9 for fixing the case member 8 and a counterbore (not shown) for sinking the head of the bolt 9 are formed in the mounting base plate 3. Furthermore, a female screw or a mounting hole 11 for fixing a bolt or the like for coupling the present mechanism provided on the mounting base plate 3 or the case member 8 with another object is provided. The material of the mounting base plate 3 is resin, metal or the like, and may be processed by molding, extrusion, drawing, or other mechanical processing.

The support shaft 4 is formed such that an intermediate shaft portion thereof has a diameter that can be inserted into the inner diameter of the rotating body 2 without rattling, and is processed to have a thickness and processing for giving necessary strength. A male thread is formed like a bolt at the end portion, and a flange portion 4a is formed at the opposite end portion that is larger than the shaft portion and has a size that does not impede the rotation of the rotating body 2. Further, as shown in FIG. 3, the support shaft 4 is provided with a plurality of holes 4b for use when fixing it to the mounting base plate 3, and various tool parts are used instead of the plurality of holes 4b. You may give a suitable hole.

A recess 12 is formed in the case member 8 as a housing for housing the rotating body 2, and the recess 12 is open on the side opposite to the guide rail 1. The recess 12 has a diameter larger than that of the rotating body 2 and is processed so that a regulation plate 16 described later can be securely inserted without rattling in the circumferential direction. Further, as shown in FIG. A hole 13 into which the flange portion 4a is fitted is formed. 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 securely fixed in the circumferential direction without rattling. Further, the case member 8 is subjected to female screw processing for fixing to the mounting base plate 3. Furthermore, the case member 8 is formed with a hole 14 into which a seal 15 for dustproofing or the like is inserted so as to face the side surface of the guide rail. The material of the case member 8 is the same as that of the mounting base plate 3, and resin, metal or the like may be processed by molding, extrusion, drawing or other mechanical processing.

A regulation plate 16 is provided between the rotating body 2 and the mounting base plate 3, and the regulation plate 16 has an outer diameter formed in the same shape as the cross-sectional shape of the recess 12 of the case member 8. A part of the peripheral surface is cut out so as not to interfere with the shoe guide rail 1. Further, a step 16a is formed on the surface of the regulation plate 16 facing the rotating body 2 in the thickness direction thereof so as to make pressure contact with the inner ring side of the rotating body 2 but not with the outer ring side. It is configured not to hinder the rotation of the rotating body 2. Further, the regulation plate 16 is also formed with a through hole 16b through which the support shaft 4 passes, and 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.

The assembling procedure of the thus constructed linear guide mechanism will be described. First, when the support shaft 4 is inserted into the hole 13 of the case member 8 from below and the rotating body 2 and the regulating plate 16 are fitted into the supporting shaft 4, the rotating body 2 is housed in the recess 12 of the case member 8 and the regulating plate is inserted. 16 is fitted in the recess 12. Then, after inserting into the through hole 5 of the mounting base plate 3, the nut 6 is tightened. Next, the case member 8 is fixed to the mounting base plate 3 with the bolts 9, and the guide groove 1 is attached from the end of the guide rail 1 so that the V groove 2a of the rotating body 2 meshes with the rail portion 1a.

Thus, the linear guide mechanism is easily assembled as shown in FIGS. 3 and 4, and the device and other members can be easily connected. In particular, since the support shaft 4 is provided with a flange portion 4a at its end which is fitted into the hole 13 without any gap, the support shaft 4 and the case member 8 are positioned only by the fitting, and further, the rotary body 2 is connected. The position with the case member 8 is determined. Furthermore, since the structure that presses against the mounting base plate 3 has become possible, the dimensions of the rotating body supporting portion from the mounting base plate 3 can be controlled even though the dimensional control of the support shaft 4, the case member 8 and the like can be facilitated. It can be managed and accuracy is improved. Further, the flange portion 4a of the support shaft 4 is provided with a hole for fixing the support shaft 4 to the mounting base plate 3, which is very effective in simplifying the assembly.

In the assembled linear guide mechanism, even if a component force that pushes the support shaft 4 to spread it is exerted on the support shaft 4 via the rotating body 2, the support shaft 4 has a lower end of the support shaft 4 at the lower end of the support shaft 4. The flange portion 4a is fitted to the case member 8 and is securely transmitted to the case member 8 via the regulation plate 16 near the upper end, and the case member 8 is fixed to the mounting base plate 3. Since the case member 8 is provided, a bending moment is generated in the support shaft 4 even if a component force is applied to the support shaft 4 to spread it outward of the guide rail 1 against the support shaft 4 as in the conventional case. There is no. Furthermore, when connecting the mounting base plate 3 and the case member 8, the mounting base plate 3 and the regulating plate 16 or the support shaft 4 between the mounting base plate 3 and the case member 8 are coupled together with the bolt 9. The displacement can be regulated to zero by passing it. As a result, it is possible to prevent the distance between the rotors 2 from changing due to load or the like.

Further, if there is a large variation in the width of the guide rail 1 or if the gap between the V groove 2 a of the rotating body 2 and the rail portion 1 a is to be managed, one of the case members 8 is placed at a predetermined position on the mounting base plate 3. This can be easily solved by using the reference case member to be attached and the other case to be the adjustment case member which is attached to the attachment base plate 3 so as to be adjustable and movable in the direction of approaching and separating from the guide rail 1. In this case, in order to form the adjustment case member, the hole diameters of the through holes 5 and 10 for the case member 8 of the mounting base plate 3 should be made larger than the shaft diameters of the support shaft 4 and the bolt 9, respectively. All you have to do is leave it.

At the time of 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 a gap. It is fixed at a predetermined position on the base plate 3. Next, the adjustment case member 8 side can be moved and adjusted toward and away from the guide rail 1 by loosening the support shaft 4 and the bolt 9 in advance. In this state, the reference case member 8 is moved. The V groove 2a of the rotating body 2 is brought into close contact with the rail portion 1a of the above, and the adjustment case member 8 is pressed against the guide rail 1 to tighten and fix the support shaft 4 and the bolt 9 after the adjustment movement.

Thus, the gap between the V groove 2a of the rotating body 2 and the rail portion 1a can be managed. For this adjustment, the force of pressing the adjustment case member 8 against the guide rail 1, that is, the applied pressure can be numerically controlled by various measuring tools, tension gauges and the like. As a result, since the numerical control is possible and the assembly is performed by combining each member, no proficiency is required for assembling and adjusting the linear guide mechanism. In addition, each member does not require any special processing, and it is certain that a large amount of standard production will be sufficient for cost reduction, leading to integrated cost reduction.

In addition, in the present invention, the meshing of the rotating body 2 and the guide rail 1 is constituted by 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. 5 (a). , (B), (c), or the guide rail 1 divided into two along the longitudinal direction as shown in FIG. 6 (a). In this case, the rotating body 2 may be configured to be supported by a rotating bearing guide formed in a box shape by the mounting base plate 3 and the case member 8 as shown in FIG. 6B.

Further, as shown in FIG. 7, the regulation plate 16 uses the bearing whose width on the inner ring 2b side is thicker than that on the outer ring 2c side as the rotating body 2, so that the step 16a becomes unnecessary, and the regulation plate 16 is It suffices to use a flat rotary member contact surface.

[0026]

[Effect of the device]

 According to the above configuration, since the present invention accommodates the rotating body in the accommodating portion of the case member fixed to the mounting base member and is supported by the support shaft reaching from the case member to the mounting base member, Since the need for learning in the field has been improved, and the rigidity has also been improved, it is possible to prevent deformation due to component force that pushes the rotating body outside the guide rail due to load, and deterioration of guiding accuracy due to it.

[Brief description of 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 sectional view of the linear guide mechanism after assembly.

5 (a), (b) and (c) are explanatory views showing a rotating body and a guide rail applicable to the present invention, respectively.

6A and 6B 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 showing a modified example of the rotating body and the regulation plate.

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

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

[Explanation of symbols]

 1 Guide Rail 2 Rotating Body 3 Mounting Base Plate 4 Spindle 4a Flange 8 Case Member 12 Recess 13 Hole 16 Regulation Plate

Claims (4)

[Scope of utility model registration request] 1. A linear guide member having rail portions formed on both sides in the extending direction, a rotating body having an outer peripheral portion fitted to the rail portion of the linear guide member, and a mounting base member to which the rotating body is attached. A linear guide that is attached to the mounting base member so 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 is provided, which is fixed to the mounting base member and has a housing portion whose side facing the linear guide member is formed, and the rotating body is housed in the housing portion of the case member. A linear guide mechanism that is supported by a support shaft that reaches from the mounting base member to the mounting base member. 2. A regulating plate, which is supported by the support shaft and is fitted into a housing portion of the case member, is provided between the rotating body and the mounting base member.
The linear guide mechanism described in. 3. The linear guide mechanism according to claim 1 or 2, 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 in a direction in which the case member comes in contact with and separates from the linear guide member. A linear guide mechanism, which is an adjustment case member that is attached to the attachment base member so as to be adjustable and movable. 4. A hole is formed in a bottom portion of the accommodating portion of the rotating body, and a flange portion having the same diameter is provided in the hole at one end of the spindle.
The linear guide mechanism according to claim 1, wherein the support shaft and the case member are positioned by fitting a flange portion of the support shaft into the hole.