JP2015127587A - Linear transmission device with wear measuring unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a linear transmission device with a wear measuring unit.SOLUTION: A linear transmission device includes: a major axis 1; a movable body 2; rolling elements 5; a wear measuring unit 4; and a warning module. The major axis 1 has long streak structure, and a surface of the major axis 1 is provided with a rolling groove 11. The movable body 2 is provided with a cover part 21 which covers the major axis 1, an inner edge face of the cover part 2 is provided with another rolling groove 211 corresponding to the rolling groove 11, and the rolling groove 11 and the rolling groove 211 constitute one load path. The plurality of rolling elements 5 are installed on the load path. The wear measuring unit 4 is installed in the movable body 2 and composed of a magnetic body 42 and an insulator 41, one end of the magnetic body 42 is installed for the surface of the major axis 1, defined as an adsorption end 421, and the insulator 41 is provided between the magnetic body 42 and the movable body 2. The warning module has both ends for electrically connecting the movable body 2 with the magnetic body 42. The adsorption end 421 adsorbs worn iron rubbish among the major axis 1, the movable body 2, and the rolling elements 5, and the warning module displays a warning signal by the iron rubbish.

Description

  The present invention relates to a linear transmission device, and more particularly to a linear transmission device provided with a wear measurement unit.

  The linear transmission device usually refers to a ball screw device or a linear guide device, and the ball screw device or the linear guide device is composed of at least a long axis and a rolling element, and has accurate positioning accuracy and high rigidity. A pressure is applied in advance between the moving body, the long shaft, and the rolling element (hereinafter referred to as pre-pressure). This pre-pressure refers to a pressure acting between the moving body, the long shaft and the rolling element when the linear transmission device is unloaded, and there is a gap between the moving body, the long shaft and the rolling element. When a linear transmission device having a preload is attached to a work stand or machine base, the rigidity and positioning accuracy of the work stand or machine base is increased, so that the machined article thus processed has good quality. Become. Therefore, a linear transmission device having a preload is a very important and important article for a precision processing machine (or machine base).

  By the way, the prior art by patent document 1 is proposed in order to prevent the fall of the positioning accuracy and rigidity of a linear transmission device by the loss | disappearance of the preload in the linear transmission device which has a preload. This prior art discloses an observation apparatus that measures a gap between a moving body, a long axis, and a rolling element using a displacement meter such as a contact type, non-contact type, LVDT, or optical fiber type. This is because the pressure also changes. In this way, the user is notified of the necessity of inspection / repair, thereby preventing the machine base from losing accuracy and continuing processing, thereby preventing the production of defective quality products. Therefore, it can be said that it is a highly practical observation apparatus.

However, the conventional observation apparatus described above has the following problems.
This observation device itself is very expensive, and if it is attached to a linear transmission device, the cost increases further, and there is a fear that it is difficult for the user to accept. In addition, it is very difficult to actually manufacture the measurement method with this observation apparatus. Moreover, foreign matter easily enters the area to be observed, interference and damage occur, and oil residue (or oil residue) is formed on the surface. ) Adheres. For this reason, an error in observation is likely to occur.

None

  The present invention has been made in view of the above problems, and its object is to have a low cost and to measure the wear with high accuracy, and thus to measure the loss of preload or the occurrence of wear. An object of the present invention is to provide a linear transmission device having a wear measuring unit.

  In order to solve the above problems, the present invention is a linear transmission device provided with a wear measurement unit, which includes a long shaft, a moving body, a plurality of rolling elements, a wear measurement unit, and a warning module. The long axis has a long strip-like structure extending in one direction, a rolling groove is provided on the surface of the long axis, and a movable portion for providing the long axis is provided on the moving body. And another rolling groove corresponding to the rolling groove is provided on the inner edge surface of the sleeve portion, and the rolling groove and the another rolling groove constitute one load path, and the rolling element Is installed in the load path, the wear measurement unit is installed in the movable body, the wear measurement unit is composed of one magnetic body and one insulator, and one end of the magnetic body is the long axis. It is installed corresponding to the surface of the surface, and is defined as an adsorption end, and the magnetic body and the movement The warning module has two ends, the moving body and the magnetic body are electrically connected to both ends, and the attracting end is Iron scrap generated by wear between the shaft, the moving body and the rolling element is adsorbed, and based on the amount of generated iron scrap, the warning module determines whether or not a warning is necessary and displays a warning signal. It is a linear transmission device provided with a wear measurement unit characterized by performing.

  Here, the moving body is provided with a mounting hole, a female screw is provided in the mounting hole, a male screw is provided on the outer edge surface of the insulator, and the insulator is screwed into the mounting hole. preferable.

  Here, it is preferable that the attraction end of the magnetic body is disposed so as to face the rolling groove.

  Here, it is preferable that the warning module includes a power source and a warning device, electrically connects the power source and the warning device, and has two connecting ends as output terminals.

  According to the present invention, the magnetic body adsorbs iron scrap generated by wear between the long axis, the moving body and the rolling element, and thereby, causes wear between the long axis, the moving body and the rolling element. It can be judged whether or not. Specifically, if the magnetic body and the moving body come into contact with each other as much iron scraps as wear occur, a warning module is notified, that is, a sign that the linear transmission device immediately loses the preload. Then, the warning module issues a warning signal to inform the user that the pre-pressure of the linear transmission device is in a warning state. In addition, the wear measuring unit of the present invention has a low cost magnetic material, a simple electric circuit, and at the same time achieves the purpose of use, and can solve various problems caused by conventional oil residue and foreign matter.

BRIEF DESCRIPTION OF THE DRAWINGS It is the whole exploded view of Example 1 of the linear transmission apparatus provided with the abrasion measurement unit of this invention. It is an assembly figure of Example 1 of the linear transmission device provided with the abrasion measurement unit of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view of Example 1 of the linear transmission apparatus provided with the abrasion measurement unit of this invention, Comprising: The warning module has shown the state which has not emitted the warning signal. BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view of Example 1 of the linear transmission device provided with the abrasion measurement unit of this invention, Comprising: The state where the warning module is issuing the warning signal is shown. It is a whole exploded view of Example 2 of the linear transmission device provided with the abrasion measuring unit of the present invention. It is an assembly figure of Example 2 of the linear transmission device provided with the abrasion measurement unit of this invention. It is a longitudinal cross-sectional view of Example 2 of the linear transmission device provided with the abrasion measuring unit of this invention, Comprising: The warning module has shown the state which has not emitted the warning signal. It is a longitudinal cross-sectional view of Example 2 of the linear transmission device provided with the abrasion measuring unit of this invention, Comprising: The state where the warning module is issuing the warning signal is shown.

  For a better understanding of the features and technical contents of the present invention, please refer to the description of the implementation method of the present invention and the drawings. However, this implementation method and drawings are for explanation and reference, and these do not impose any limitation on the present invention.

  Referring to the preferred embodiment 1 of the present invention shown in FIGS. 1 to 4, the linear transmission device of the present embodiment 1 is a kind of ball screw device, and this ball screw device has a long shaft 1, It includes a moving body 2, a plurality of rolling elements 5, a plurality of circulation members 3, a wear measuring unit 4, and a warning module.

  The long axis 1 is a long strip structure extending in one direction, and a spiral rolling groove 11 is provided on the surface of the long axis 1.

  The movable body 2 is provided with a knitted portion 21 for covering the long shaft 1, and the knitted portion 21 has a circular through hole, and an inner edge surface thereof is provided with another portion corresponding to the rolling groove 11. A rolling groove 211 is provided, and the rolling groove 11 and the another rolling groove 211 constitute one load path. The moving body 2 is provided with a mounting hole 22. In the first embodiment, the mounting hole 22 is provided with a female screw.

  The rolling element 5 is installed in the load path. The circulating member 3 is installed in the moving body 2 and serves to circulate (or return) through the rolling element 5.

  Referring to FIGS. 1 and 3, the wear measurement unit 4 is composed of one magnetic body 42 and one insulator 41 in the first embodiment, and this magnetic body 42 is a magnet, and the insulator 41 is Made of plastic or rubber. The insulator 41 is screwed into the mounting hole 22 by providing a male screw on the outer edge surface of the insulator 41. As shown in the partially enlarged view in FIG. 3, the magnetic body 42 is covered with an insulator 41 on the surface portion (excluding the upper end) composed of a lower end and a side surface. That is, the insulator 41 is provided between the magnetic body 42 and the mounting hole 22 of the moving body 2. One end (or upper end) of the magnetic body 42 is disposed to face the surface of the long axis 1 and is defined as the adsorption end 421. In the first embodiment, the suction end 421 is installed with respect to the rolling groove 11 of the long shaft 1. Thereby, the iron scrap 7 by abrasion can be adsorb | sucked directly.

  The warning module includes a power supply 8 and a warning device 9. In the first embodiment, the warning device 9 is a warning light, may be a buzzer or an alarm, and the power source 8 and the warning device 9 are electrically connected, and the two connecting ends 6 are output terminals, and both connecting ends 6 are The moving body 2 and the magnetic body 42 are electrically connected to each other.

  The adsorbing end 421 of the magnetic body 42 adsorbs iron scrap 7 generated by wear between the long shaft 1, the moving body 2 and the rolling element 5, and the warning is based on the amount of iron scrap 7 generated. The module determines whether a warning is necessary. For example, when the amount of generated iron scrap 7 becomes so large as to contact the magnetic body 42 and the moving body 2, the warning module determines that the warning signal is displayed and instructs the warning device 9 to display the warning. (See FIG. 4).

  Referring to the preferred embodiment 2 of the present invention shown in FIGS. 5 to 8, the linear transmission device of the present embodiment 2 is a kind of linear guide device, and this linear guide device is a Although the rolling groove 11 is a linear rail, the moving body 2 has a portal structure, and the maneuvering section 21 has a concave groove structure, all other configurations are the same as in the first embodiment. The detailed description thereof will be omitted.

<Invention>
1: Long shaft or screw shaft 11: Rolling groove 2: Moving body 21: Pushing portion 211: Rolling groove 22: Mounting hole 3: Circulating member 4: Wear measuring unit 41: Insulator 42: Magnetic body 421: Adsorption End 5: Rolling element 6: Connection end 7: Iron scrap 8: Power supply 9: Warning device

Claims (4)

A linear transmission device with a wear measurement unit,
A long shaft, a moving body, a plurality of rolling elements, a wear measurement unit, and a warning module;
The long axis is an elongated structure extending in one direction, and a rolling groove is provided on the surface of the long axis,
The movable body is provided with a sleeve portion for covering the long axis, and an inner edge surface of the sleeve portion is provided with another rolling groove corresponding to the rolling groove, The another rolling groove constitutes one load path,
The rolling element is installed in the load path,
The wear measurement unit is installed on the movable body, and the wear measurement unit is composed of one magnetic body and one insulator, and one end of the magnetic body is installed corresponding to the surface of the long axis. And defining the attraction end, and providing the insulator between the magnetic body and the moving body,
The warning module has two ends, and the moving body and the magnetic body are electrically connected to the both ends, respectively.
The adsorption end adsorbs iron scrap generated by wear between the long shaft, the moving body, and the rolling element, and the warning module determines whether or not a warning is necessary based on the generated amount of iron scrap. In addition, a linear transmission device equipped with a wear measurement unit, characterized by displaying a warning signal.   The moving body is provided with a mounting hole, a female screw is provided in the mounting hole, a male screw is provided on an outer edge surface of the insulator, and the insulator is screwed into the mounting hole. A linear transmission device comprising the wear measurement unit according to claim 1.   The linear transmission device with a wear measurement unit according to claim 1, wherein the attraction end of the magnetic body is disposed to face the rolling groove.   2. The wear measurement unit according to claim 1, wherein the warning module includes a power supply and a warning device, electrically connects the power supply and the warning device, and has two connecting ends as output terminals. Linear transmission device.