JP2020041706A5

JP2020041706A5 -

Info

Publication number: JP2020041706A5
Application number: JP2019214610A
Authority: JP
Filing date: 2019-11-27
Publication date: 2020-05-21
Anticipated expiration: 2031-12-01

Description

上述の目的を達成するために、本発明の第１の観点に係るアクチュエータは、
モータの回転軸の回転運動とともに回転運動するボールねじ軸と、前記ボールねじ軸の回転運動に伴って直線運動するボールねじナットと、を有するボールねじと、
前記ボールねじ軸の回転運動に基づいて直線運動し、直線運動方向に貫通すると共に内部に前記ボールねじナットが固定されているナット収納孔が形成されている単一の素材からなり、金属からなる部材であるスライド部本体を有するスライド部と、前記スライド部本体が摺動するレール部と、を備えるガイド装置と、
前記スライド部本体に設けられた前記ナット収納孔に固定される作業軸と、
を有する。 In order to achieve the above object, the actuator according to the first aspect of the present invention comprises:
A ball screw having a ball screw shaft that rotates together with the rotating motion of the rotating shaft of the motor, and a ball screw nut that moves linearly with the rotating motion of the ball screw shaft,
The linear motion based on the rotation movement of the ball screw shaft consists of a single material nut accommodating hole in which the ball screw nut inside is fixed is made form together through a linear motion direction, a metal a slide portion having a made member sliding body, and the rail portion to which the sliding body slides, a guide device comprising a,
A work shaft fixed to the nut storage hole provided in the slide body,
Have.

前記スライド部本体には、突起が形成され、 A protrusion is formed on the slide body,
前記レール部には、前記突起が嵌め込まれ、前記突起が摺動する被摺動部分が形成されていてもよい。 The rail portion may be formed with a sliding portion on which the protrusion is fitted and the protrusion slides.

前記突起は、前記直線運動方向に沿った線状に形成され、 The protrusion is formed in a linear shape along the linear movement direction,
前記レール部には、前記直線運動方向に平行な摺動部分用溝部が、前記被摺動部分として形成されていてもよい。 A groove for a sliding portion that is parallel to the linear movement direction may be formed in the rail portion as the portion to be slid.

前記スライド部には、前記直線運動方向に平行な第１溝部が形成され、  A first groove portion parallel to the linear movement direction is formed in the slide portion,
前記レール部には、前記第１溝部に対向し、前記直線運動方向に沿って第２溝部が形成され、  A second groove portion is formed in the rail portion so as to face the first groove portion and along the linear movement direction;
前記ガイド装置は、前記第１溝部及び前記第２溝部に挟まれることにより前記第１溝部及び前記第２溝部を転動して、前記スライド部を移動可能に支持する転動体を備えていてもよい。  The guide device may include a rolling element that rolls the first groove portion and the second groove portion by being sandwiched between the first groove portion and the second groove portion to movably support the slide portion. Good.

本発明の第２の観点に係るアクチュエータの製造方法は、
第１の観点に係るアクチュエータの製造方法であって、
前記スライド部本体を形成するための前記単一の素材を準備する第１工程と、
前記第１工程によって準備された前記単一の素材から、前記ナット収納孔が形成されている前記スライド部本体を形成する第２工程と、
前記第２工程によって形成された前記スライド部本体の前記ナット収納孔の内部に、前記ボールねじナットを固定する第３工程と、
を含む。 A method of manufacturing an actuator according to a second aspect of the present invention,
A method of manufacturing an actuator according to a first aspect,
A first step of preparing the single material for forming the slide body,
From the single material that has been prepared by the first step, a second step of forming the slide body said nut accommodating hole is made form,
A third step of fixing the ball screw nut inside the nut accommodating hole of the body of the slide portion formed in the second step,
including.

本発明によれば、作業軸（ロッド）は、ガイド装置のスライド部のスライド部本体に設けられたナット収納孔に固定されている。このガイド装置により、モータの回転に起因したトルクが、スライド部を介して、作業軸に伝わりにくく、作業軸の先端部の振れの発生を抑制することができる。また、作業軸を、ガイド装置のスライド部に直接固定することが可能になり、作業軸を、ガイド装置のスライド部に固定するための別の部品を別途用意する必要はなくなる。 According to the present invention, work axis (rod) is fixed to the nut accommodating hole provided in the sliding body of the slide of the guide device. With this guide device, the torque caused by the rotation of the motor is less likely to be transmitted to the work shaft via the slide portion, and it is possible to suppress the occurrence of runout of the tip portion of the work shaft. Further, the work shaft can be directly fixed to the slide part of the guide device, and it is not necessary to separately prepare another component for fixing the work shaft to the slide part of the guide device.

また、図２７（Ｇ）に示す変形例では、スライド部３１の凸部３３の＋Ｘ側の面には、Ｙ軸方向に沿った線状の突起１３２が形成され、スライド部３１の凸部３４の−Ｘ側の面には、Ｙ軸方向に沿った線状の突起１３３が形成されている。そして、これらの突起１３２，１３３が、レール部の凹部６２ａ，６３ａに摺動可能に嵌め込まれている。この場合、ボール５０が転動する軌道の数を、１つのみにすることもできる。 Further, in the modification shown in FIG. 27G, a linear protrusion 132 along the Y-axis direction is formed on the + X side surface of the convex portion 33 of the slide portion 31, and the convex portion 34 of the slide portion 31 is formed. A linear protrusion 133 along the Y-axis direction is formed on the −X side surface of the. The projections 132 and 133 are slidably fitted in the recesses 62a and 63a of the rail portion. In this case, the number of tracks on which the ball 50 rolls can be set to only one.

Claims

A ball screw having a ball screw shaft that rotates together with the rotating motion of the rotating shaft of the motor, and a ball screw nut that moves linearly with the rotating motion of the ball screw shaft,
The linear motion based on the rotation movement of the ball screw shaft consists of a single material nut accommodating hole in which the ball screw nut inside is fixed is made form together through a linear motion direction, a metal a slide portion having a made member sliding body, and the rail portion to which the sliding body slides, a guide device comprising a,
A work shaft fixed to the nut storage hole provided in the slide body,
An actuator.

A protrusion is formed on the slide body,
The actuator according to claim 1, wherein the rail portion has a sliding portion on which the protrusion is fitted and the protrusion slides.

The protrusion is formed in a linear shape along the linear movement direction,
The actuator according to claim 2, wherein a sliding portion groove portion parallel to the linear movement direction is formed in the rail portion as the sliding portion.

  A first groove portion parallel to the linear movement direction is formed in the slide portion,
  A second groove portion is formed in the rail portion so as to face the first groove portion and along the linear movement direction;
  The guide device includes a rolling element that rolls the first groove portion and the second groove portion by being sandwiched between the first groove portion and the second groove portion to movably support the slide portion. The actuator according to any one of 1 to 3.

The actuator according to any one of claims 1 to 4, wherein the slide portion main body is connected to the ball screw nut so as to linearly move together with the ball screw nut.

A male screw portion is formed on the working shaft,
A female screw portion is formed in the nut storage hole of the slide portion main body,
The actuator according to any one of claims 1 to 5, wherein the working shaft is fixed to the slide portion main body by screwing the male screw portion and the female screw portion.

A first coupling is provided at an end of the ball screw shaft, the first coupling being connected to a tip of the rotary shaft when the motor is attached, and transmitting the rotational motion of the rotary shaft. Item 7. The actuator according to any one of items 1 to 6.

The actuator according to any one of claims 1 to 7, further comprising the motor having the rotation shaft.

The actuator according to claim 1, further comprising a screw member for detachably attaching the motor.

A second coupling, which is connected to an end of the ball screw when the motor is attached and is used for transmitting the rotational movement of the rotary shaft to the ball screw, is provided at the tip of the rotary shaft. The actuator according to any one of claims 1 to 9, which is present.

It is a manufacturing method of the actuator as described in any one of Claim 1 to 10, Comprising:
A first step of preparing the single material for forming the slide body,
From the single material that has been prepared by the first step, a second step of forming the slide body said nut accommodating hole is made form,
A third step of fixing the ball screw nut inside the nut accommodating hole of the body of the slide portion formed in the second step,
A method for manufacturing an actuator, comprising: