Translation movement device employing belt drive

Patent metadata

Field	Value
Publication number	US-10486906-B2
Application number	US-201815958457-A
Country	US
Kind code	B2
Filing date	Apr 20, 2018
Priority date	Apr 24, 2017
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A translation movement device includes a guide, a long slider guided by the guide, and a belt driver displacing the slider; and the belt driver includes an open belt arranged parallel to the slider, a drive pulley for the open belt, and a tension bar arranged parallel to the open belt; and the tension bar is connected to the long slider at a middle position between two belt holders that hold respective end portions of the open belt.

First claim

What is claimed is:

1. A translation movement device comprising:
a guide having a guide assembly;
a long slider which is guidable by the guide, wherein the long slider is longer in a displacement direction than the guide assembly; and
a belt driver that displaces the long slider with respect to the guide, the belt driver comprising:
an open belt arranged along the displacement direction of the long slider;
a drive pulley that transmits a driving force to the open belt; and
a tension bar arranged along the displacement direction of the long slider, wherein the tension bar includes belt holders that hold respective ends of the open belt, and wherein the tension bar is connected to the long slider at a middle position between the belt holders holding the respective ends.

2. The translation movement device according to claim 1 , wherein the displacement direction of the long slider is in an elevating/lowering direction.

3. The translation movement device according to claim 2 , wherein in a cross section on a plane orthogonal to the displacement direction, the tension bar has rigidity sufficient enough to prevent buckling deformation in response to tension received from the open belt.

4. The translation movement device according to claim 3 , further comprising a connector that connects the tension bar and the long slider, wherein the connector is arranged proximate a center of gravity of the long slider on a plane orthogonal to the displacement direction.

5. The translation movement device according to claim 4 , wherein the connector portion is arranged closer to the center of gravity than an outer circumferential surface of the long slider.

6. The translation movement device according to claim 2 , further comprising a connector that connects the tension bar and the long slider, wherein the connector is arranged proximate a center of gravity of the long slider on a plane orthogonal to the displacement direction.

7. The translation movement device according to claim 6 , wherein the connector portion is arranged closer to the center of gravity than an outer circumferential surface of the long slider.

8. The translation movement device according to claim 1 , wherein in a cross section on a plane orthogonal to the displacement direction, the tension bar has rigidity sufficient enough to prevent buckling deformation in response to tension received from the open belt.

9. The translation movement device according to claim 8 , further comprising a connector that connects the tension bar and the long slider, wherein the connector is arranged proximate a center of gravity of the long slider on a plane orthogonal to the displacement direction.

10. The translation movement device according to claim 9 , wherein the connector portion is arranged closer to the center of gravity than an outer circumferential surface of the long slider.

11. The translation movement device according to claim 1 , further comprising a connector that connects the tension bar and the long slider, wherein the connector is arranged proximate a center of gravity of the long slider on a plane orthogonal to the displacement direction.

12. The translation movement device according to claim 11 , wherein the connector portion is arranged closer to the center of gravity than an outer circumferential surface of the long slider.

13. A measuring device comprising:
a translation movement device comprising:
a guide having a guide assembly;
a long slider which is guidable by the guide, wherein the long slider is longer in a displacement direction than the guide assembly;
a belt driver that displaces the long slider with respect to the guide, the belt driver comprising:
an open belt arranged along the displacement direction of the long slider;
a drive pulley that transmits a driving force to the open belt; and
a tension bar arranged along the displacement direction of the long slider, wherein the tension bar includes belt holders that hold respective ends of the open belt, and wherein the tension bar is connected to the long slider at a middle position between the belt holders holding the respective ends; and

a stylus head attached to a tip of the long slider.

14. The translation movement device according to claim 13 , wherein the displacement direction of the long slider is in an elevating/lowering direction.

15. The translation movement device to claim 13 , wherein in a cross section on a plane orthogonal to the displacement direction, the tension bar has rigidity sufficient enough to prevent buckling deformation in response to tension received from the open belt.

16. The translation movement device according to claim 13 , further comprising a connector that connects the tension bar and the long slider, wherein the connector is arranged proximate a center of gravity of the long slider on a plane orthogonal to the displacement direction.

17. The translation movement device according to claim 16 , wherein the connector portion is arranged closer to the center of gravity than an outer circumferential surface of the long slider.

Assignees

• Mitutoyo Corp

Inventors

• Kiyotani Shingo
• Otsubo Seiichi
• Takesako Koji
• Oneta Takao

Classifications

• G01B5/0014

  due to temperature (on machine tools B23Q11/0003) · CPC title

• B65G15/30

  Belts or like endless load-carriers (co-operating with rails or the like B65G21/22; {co-operating} with rollers B65G39/20) · CPC title

• G01B21/02

  for measuring length, width, or thickness (G01B21/10 takes precedence) · CPC title

• G01B5/0009

  Guiding surfaces; Arrangements compensating for non-linearity there-of · CPC title

• B65G15/64

  for automatically maintaining the position of the belts · CPC title