RU2566734C2 - Micro motor control device - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: invention pertains to electrical engineering and can be used in dental, jeweller's and beauty therapy equipment. A micro motor control device is designed to change its rotational speed by a speed governor (19) and equipped with a pointer (1) of the maximum permitted rotational speed for the micro motor tool made as a scale with a diameter of its operating part divided into intervals (2-13), and the marking of the above intervals is identical to the speed governor (19).

EFFECT: provision of the maximum safe rotational speed of the tool depending on the diameter of its operating part.

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Description

Technical field

The invention relates to dental, jewelry and cosmetology (manicure) equipment, and more specifically, to a micromotor speed control device.

State of the art

At present, high-speed micromotors are widely used, the speed of which can be regulated up to 50,000 rpm. Such micromotors have found application in dental, jewelry and cosmetology (manicure) equipment and are in free sale. Working tools for such micromotors are also freely sold, have different sizes (diameter of the working part) and are not always well balanced.

The rules for working with micromotors (see http://www.nailcenter.ru/rules.htm) recommend that you do not exceed the maximum permissible rotation speed in order to avoid injuries and malfunctions in the micromotor. They also have a table of maximum permissible rotation speeds. So, for a diameter of the working part of the micromotor tool less than 2 mm, a speed of up to 50,000 rpm is recommended, from 2 to 4 mm - not more than 40,000 rpm, from 4 to 8 mm - not more than 30,000 rpm , from 8 to 18 mm - not more than 20,000 rpm, from 18 to 28 mm - not more than 15,000 rpm, from 28 to 40 mm - not more than 10,000 rpm, more than 40 mm - not more than 5,000 rpm .

However, it should be noted that many consumers are not familiar with these rules and therefore they are not applied in practice.

So, it is known the control device micromotor MARATHON - No. 2, (see http://www.implants-trading.ru/img/product/marathon-n2_max.jpg,), configured to change the speed of rotation by means of a speed controller having graduation without specifying numerical values of speed. The operating manual is attached to this device, in which the above table of maximum permissible rotation speeds is placed in a stylized form. However, it is impossible to use this table, since the speed controller does not have an appropriate speed calibration. Therefore, the operation of such devices is hazardous.

Also known is a micromotor control device of the Ultimate XL series (see http://www.aldent.su/seriya-ultimate-xl), configured to change its rotation speed by means of a speed regulator having a digital graduation (digital indication of speed). It should also be noted that this device can be equipped with operating instructions with the above table of permissible rotation speeds.

However, it is not easy to use the recommendations of this table in practice, since it must always be at hand, or learned by heart, and you also need to have means for measuring the diameter of the working part of the micromotor tool and logically measure them with a digital speed indicator.

All of the above is not operational and complicates safe operation.

Disclosure of invention

The basis of the invention is the task of translating the table of maximum permissible rotation speeds into a structural element of the micromotor control device, which would allow to quickly determine this speed without using any additional measuring tools and logical transformations of the diameter of the working part of the tool into its permissible rotation speed.

The problem is solved in that a micromotor control device configured to change its rotation speed by means of a speed controller having a graduation according to the invention introduces a pointer to the maximum allowable speed of the micromotor tool, which is made in the form of a scale for determining the diameter of its working part, divided at intervals, the sizes of which correspond to all possible diameters of the working parts of the tool, and their calibration is identical to the calibration of the above ora revolutions.

Introduction to the micromotor control device, according to the invention, of a new structural element - an indicator of the maximum permissible rotation speed of the micromotor tool and its execution in the form of a scale for determining the diameter of its working part, divided into intervals, the sizes of which correspond to all possible diameters of the working parts of the tool, and their graduation identical to the calibration of the above speed controller, allows you to quickly inform about the safe operation of the micromotor and set it t mode without the use of any additional measuring tools, such as a ruler, caliper, tachometer, and logical transformations of the diameter of the working part of the tool into its maximum permissible rotation speed, which, of course, will lead to safe operation and prolongation of operation without breakdowns.

Brief Description of the Drawings

The invention is further illustrated by the description of a specific embodiment and its accompanying drawings, in which:

FIG. 1 shows a pointer to the maximum allowable rotation speed of a micromotor tool according to the invention;

FIG. 2 - the same pointer in the process of determining the maximum permissible rotation speed of the working part of the tool, the diameter of which does not exceed 2 mm, according to the invention;

FIG. 3 - the same pointer in the process of determining the maximum allowable speed of rotation of the working part of the tool, the diameter of which exceeds 2 mm, according to the invention;

FIG. 4 depicts the appearance (front panel) of a micromotor control device according to the invention.

The best embodiment of the invention

Index 1 (Fig. 1) of the maximum allowable rotation speed of the micromotor tool is made in the form of a scale for determining the diameter of its working part, divided into intervals.

The first, central, interval at boundaries 2, 3 is 2 mm and is marked 50,000 rpm, (rotation speed is not indicated in Fig. 1), the interval at borders 4, 5 is 4 mm and is marked at 2, 4 and 3, 5 - 40,000 rpm, the interval at 6.7 is 8 mm and is marked at 6, 4 and 7, 5 - 30,000 rpm, the interval at 8, 9 is 18 mm and is marked at the boundaries of 8, 6 and 9, 7 - 20,000 rpm, the interval at the borders of 10, 11 is 28 mm and is marked at the borders of 10, 8 and 11.9 - 15,000 rpm, the interval at the borders of 12, 13 is 40 mm and has a marking within 12, 10 and 13, 11 - 10,000 rpm, and the marking of the interval beyond the external limits of 12, 13 is 5000 rpm.

It is advisable to make a hole with a diameter of 2.35 mm in place of the central interval within the boundaries of 2, 3, which will greatly simplify the procedure for determining the maximum allowable speed of the micromotor tool, since the diameter of the shank 14 (Fig. 2) of the cutter 15 of this tool or the diameter of the holder 16 ( Fig. 3) of the disk 17 are universal and equal to 2.35 mm, and this diameter is most widely used in practice.

On the front panel 18 (Fig. 4) of the micromotor control device there is a 19-speed controller equipped with markings 5000, 10000, 15000, 20,000, 30,000, 40,000 and 50,000 rpm, indicator 1 of the maximum permissible speed of the micromotor tool, equipped with in the above sections, with the same markings as on the 19-revolutions regulator, as well as a micromotor connector, a reverse switch and a mains switch.

The micromotor control device operates as follows. Having selected the necessary working tool, for example, milling cutter 15 (Fig. 2), insert it into the central hole at the boundaries 2, 3 of the index 1 of the maximum permissible rotation speed of the micromotor tool, and if it passes into it, then according to its marking (Fig. 4) 50,000 the speed controller 19 is set to the same marking or less.

For example, choosing disk 17 as a working tool (Fig. 3), insert its holder 16 into the central hole at the boundaries 2, 3 of index 1 of the maximum permissible speed of the micromotor tool and see that this disk 17 is inside the area at 8, 9, which is marked 20,000 (Fig. 4), after which the speed controller 19 is set to the same marking or less.

It should be noted that the diameter of 2.35 mm is slightly larger than the diameter of 2 mm, however, such a small value can be neglected, since it will practically not affect the safety of work.

It should also be noted that the digital marking of the governor 19 revolutions and index 1 of the maximum permissible rotation speed of the micromotor tool can be replaced, for example, by color.

Industrial applicability

The invention can be successfully used in dental, jewelry and cosmetology practice to improve safety and longer operation of micromotors.

Claims (1)

A micromotor control device configured to change its rotation speed by means of a speed controller having a graduation,
characterized in that
it is equipped with a pointer to the maximum allowable speed of rotation of the micromotor tool, made in the form of a scale for determining the diameter of its working part, divided into intervals, the sizes of which correspond to all possible diameters of the working parts of the tool, and their graduation is identical to the graduation of the above speed controller.

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