KR20150000792A - Orbital transducer for rotary tool - Google Patents

Abstract

An invention for an orbital conversion device for a rotary tool is disclosed. An orbital conversion apparatus for a rotary tool, comprising: a driving unit provided in a rotary tool body; a friction unit for processing the surface of the object using the power of the driving unit; And an eccentric rotation part for converting the eccentric rotation of the orbital orbit into eccentric rotation.

Description

[0001] ORBITAL TRANSDUCER FOR ROTARY TOOL [0002]

[0001] The present invention relates to an orbital conversion apparatus for a rotary tool, and more particularly, to an orbital conversion apparatus for a rotary tool, in which an eccentric rotation structure is applied to a rotary tool to induce orbital orbital vibration when a grinder is attached, Orbit conversion apparatus.

Generally, a grinding operation is a process of grinding and solidifying the surface of a solid such as stone, metal, glass or the like by using a grinder.

The sanding work is to remove scratches using a sander, to smooth the surface of the paint, and to rub it with abrasives to improve the adhesion of the paint coat.

Conventionally, there is a drawback in that both of the grinder and the sander are required to be used for processing the surface of the workpiece.

In other words, since a conventional grinder has a problem of eating a surface of a workpiece due to a single rotation, a sander machine is used to induce a smooth surface machining to compensate.

On the other hand, an orbital sander that rotates while orbiting the sander machine is used nowadays.

BACKGROUND ART [0002] The background art of the present invention is proposed in Korean Patent Registration No. 1167922 (entitled Pneumatic Orbital Sander, Date of Registration: July 17, 2012).

The conventional orbital sender is complicated in that the orbital orbit rotating structure is complicated and it is difficult to apply the orbital orbit rotating structure to the grinder.

Therefore, by carrying out the surface work of the workpiece after each of the grinder and the orbital sander machine is provided, there is a problem that the number of work rotary tools to be carried by the worker increases and the cost of purchasing the rotary tool increases.

Therefore, there is a need to improve this.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned needs, and an object of the present invention is to provide an eccentric rotation structure for a rotary tool, which induces an orbital orbital vibration when used for a grinder, An orbital conversion device for a tool.

According to an aspect of the present invention, there is provided an orbital transformation apparatus for a rotary tool, including: a driving unit provided in a rotary tool body; A friction portion for processing the surface of the object using the power of the driving portion; And an eccentric rotation part which is provided between the driving part and the friction part and converts the rotation of the driving part into orbital eccentric rotation in the friction part and transmits the rotation.

The eccentric rotation unit may include: An eccentric member having a coupling hole coupled to the driving unit and a mounting hole having a central eccentricity formed on an opposite side with respect to a center of the coupling hole; A bearing member inserted into the mounting hole and eccentrically installed; And an attachment member provided at the center of the bearing member and coupled with the friction portion.

Also, the eccentric distance D between the center of the coupling hole and the center of the mounting hole is in the range of 1 to 3 mm.

Further, the bearing member is fixed to the mounting hole by a first detent ring member, and an inner circumferential surface of the mounting hole is formed with a locking groove portion in which the first detent ring member is engaged.

The mounting member is formed to protrude from the bearing member, and the mounting member is prevented from being separated from the bearing member by the second stop ring member provided at the end portion, and the end portion of the mounting member And a seating groove portion in which the detent ring member is provided is formed.

Further, a mounting space formed at a side of the mounting hole is formed narrower than a width of the mounting hole, and the end of the mounting member and the second detent ring member are disposed in the mounting space.

The orbital transformation device for a rotary tool according to the present invention can provide grinding operation and sanding operation simultaneously by applying an eccentric rotation structure to a rotary tool and inducing orbital orbital vibration when used for a grinder, have.

1 is a perspective view of a rotary tool having an orbital conversion device according to an embodiment of the present invention.
2 is an exploded perspective view of an orbital conversion device for a rotary tool according to an embodiment of the present invention.
3 is an exploded bottom perspective view of an orbital transformation device for a rotary tool according to an embodiment of the present invention.
4 is a sectional view of an assembled state of an orbital transformation device for a rotary tool according to an embodiment of the present invention.
5 is a front view and right and left side views of an eccentric member in an orbital conversion apparatus according to an embodiment of the present invention.
FIG. 6 is a diagram showing various types of orbital vibration shapes by an orbital conversion apparatus according to an embodiment of the present invention.

Hereinafter, an orbital conversion apparatus for a rotary tool according to an embodiment of the present invention will be described with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a perspective view showing a rotary tool having an orbital conversion apparatus according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of an orbital conversion apparatus for a rotary tool according to an embodiment of the present invention, 4 is a cross-sectional view of an orbital conversion apparatus for a rotary tool according to an embodiment of the present invention in an assembled state. FIG. 5 is a cross-sectional view of an orbital conversion apparatus according to an embodiment of the present invention. FIG. 6 is a view showing various types of orbital vibration shapes by an orbital conversion apparatus according to an embodiment of the present invention.

1 to 6, an orbital transformation apparatus for a rotary tool according to an embodiment of the present invention includes a rotary tool body 2, a driving unit 10, a friction unit 20, and an eccentric rotation unit 30, .

1 and 4, the rotary tool body 2 is a constitution for forming the outer shape of the rotary tool 100 according to the present invention, and includes a handle portion which can be held by a worker, And a power portion in which the power source is embedded.

Here, the rotary tool 100 refers to various tools capable of processing a machined surface of an object in various frictional contact methods, such as electric or air grinders, sanders, polishers and the like.

A protective cover 4 may be provided around the lower side of the rotary tool body 2 to prevent dust or the like generated by the frictional portion 20, which will be described later, from moving toward the operator when the rotary tool 100 is used.

The protective cover 4 may be configured to cover the periphery of the frictional portion 20 in a semicircular shape or to cover the entire periphery of the frictional portion 20.

In the drawings of the present invention, the periphery of the friction portion 20 is shown in a state of covering the friction portion 20 in a semicircular shape.

The driving unit 10 is provided in the rotary tool body 2 to provide power, and it is possible to apply a motor, an air motor, a rotating cylinder, and various types of rotating equipment.

The driving unit 10 may be integrally provided inside the front side of the rotary tool body 2 and may be mounted such that the rotary shaft 12 is exposed downward.

The rotating shaft 12 is formed with a threaded portion so as to be screwed to the engaging hole 31 of the eccentric member 32 to be described later. Of course, the rotary shaft 12 may be coupled to the coupling hole 31 by applying a key system or a hook system in addition to the screw system.

The friction portion 20 is configured to process the surface of the object by using the power of the driving portion 10. [

The friction portion 20 includes a support shaft 22, a bottom plate 24, and a friction member 26. [

The support shaft 22 is assembled to the fastening hole 39 of a mounting member 36 to be described later. A threaded portion is formed on the outer peripheral surface of the support shaft 22 and assembled to the fastening hole 39.

The support shaft 22 may be coupled to the fastening hole 39 by a key system or a hook system in addition to the screw system.

The bottom plate 34 is formed in the shape of a circular or square plate, and the power of the driving unit 10 is converted into orbital eccentric rotation through the eccentric rotation unit 30 to be described later.

The friction member 26 is integrally or detachably provided on the bottom surface of the bottom plate 24 and may be formed of a cloth member, a fusing member, a sandpaper, an abrasive member, or the like.

In other words, by variously providing the friction members 26, various operations such as a polishing operation, a sanding operation, a polishing operation, and the like can be performed.

2 to 4, the eccentric rotation unit 30 is provided between the driving unit 10 and the friction unit 20 and converts the rotation of the driving unit 10 from the friction unit 20 to orbital eccentric rotation .

The eccentric rotation portion 30 includes an eccentric member 32, a bearing member 34, and an attachment member 36. [

The eccentric member 32 is formed with a coupling hole 31 to be engaged with the driving portion 10 and a mounting hole 33 with a center portion being eccentric on the opposite side with respect to the center portion of the coupling hole 31 is formed.

The eccentric distance between the center of the coupling hole 31 and the center of the mounting hole 33 preferably has a range of 1 to 3 mm.

Therefore, as shown in Fig. 6, the friction portion 20 treats the surface of the object while causing the orbital eccentric rotation while generating vibration of 2 to 6 mm, thereby solving the characteristic of digging the surface of the object due to the single rotation can do.

6 is a state diagram showing a 5-millimeter orbit vibration of the friction portion 20 which is twice as large as the eccentric distance D is 2.5 mm, and the second diagram shown in FIG. 6 is an eccentric distance D, Is a diagram showing a 2-mm orbital vibration of the friction portion 20 which is twice as large as that of the first embodiment. Also, as in the embodiment of the present invention, when the eccentric distance D is 1.5 mm, 3 mm orbital vibration (not shown) of the friction portion 20 which is twice as large can be seen.

The bearing member 34 is inserted into the mounting hole 33 and is eccentrically installed.

The bearing member 34 is configured such that a ball bearing or a roller bearing is inserted between the outer ring and the inner ring.

At the center of the bearing member 34, a fitting hole into which a mounting member 36 to be described later is inserted is formed.

The mounting member 36 is provided at the center of the bearing member 34 and has a structure in which the support shaft 22 of the friction portion 20 is inserted and engaged.

The bearing member (34) is fixed to the mounting hole (33) by a first stop ring member (40). The first detent ring member 40 is preferably made of an O-ring having a rectangular cross section. Of course, it can be made of O-rings having a circular cross-section as required and various other types of ring members.

A locking groove 35 is formed in the inner circumferential surface of the mounting hole 33 so that the first detent ring member 40 is engaged.

The outer part of the first detent ring member 40 is inserted into the engagement groove 35 and the other inner part of the first stop ring member 40 is in contact with the front surface of the bearing member 34, So that it is prevented from being detached from the ball 33.

The mounting member 36 is formed such that its end portion protrudes from the bearing member 34.

The mounting member 36 can be prevented from being separated from the bearing member 34 by the second stop ring member 50 provided at the end portion.

At the end of the mounting member 36, a seating groove portion 38 in which the second stop ring member 50 is provided is formed.

The inner part of the second detent ring member 50 is inserted into the seat groove 38 and the other outer part of the seat is brought into contact with the rear surface of the bearing member 34 so that the mounting member 36 is separated from the bearing member 34 .

At one side of the mounting hole (33), an installation space (60) formed narrower than the width of the mounting hole (33) is formed. At this time, the end of the installation member 36 and the second stop ring member 50 may be disposed in the installation space portion 60.

The mounting space portion 60 may be formed so as to be recessed at a certain depth toward the coupling hole 31 in a state in which the mounting space portion 60 is formed narrower than the width of the mounting hole 33.

Hereinafter, the operation and effect of the orbit conversion device for a rotary tool according to an embodiment of the present invention will be described with reference to the accompanying drawings.

1 and 4, when the operator holds the rotary tool body 2 and operates the power switch, electricity is supplied to the drive unit 10 to rotate.

Then, the rotation axis 12 of the driving unit 10 rotates the eccentric member 32 of the coupled eccentric rotation unit 30,

As a result, the bearing member 34 provided eccentrically to the mounting hole 33 of the eccentric member 32 and the mounting member 36 inserted into the bearing member 34 are arranged as shown in Fig. And operates at a vibration width twice as large as that of the eccentric distance (D).

Orbital eccentric rotation of the friction member 26 through the support shaft 22 and the bottom plate 24 of the friction portion 20 fastened to the fastening hole 39 of the mounting member 36, So that uniform and smooth surface processing can be performed.

Accordingly, the orbital transformation device for a rotary tool according to the present invention can simultaneously perform the grinding operation and the sanding operation by inducing the orbital orbital vibration when using the eccentric rotation structure for the grinder by applying the rotary tool 100 to the rotary tool 100, Convenience can be provided.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

Accordingly, the true scope of protection of the present invention should be defined by the following claims.

100: rotating tool 2: rotating tool body
10: driving part 12:
20: friction portion 22: support shaft
24: bottom plate 26: friction member
30: eccentric rotation part 32: eccentric member
31: engaging hole 33: mounting hole
34: bearing member 35:
36: mounting member 37: end
38: seat groove portion 40, 50: first and second detent ring members

Claims (6)

A driving unit provided in the rotary tool body;
A friction portion for processing the surface of the object using the power of the driving portion; And
An eccentric rotation unit provided between the driving unit and the friction unit and converting the rotation of the driving unit into orbital eccentric rotation in the friction unit,
Wherein the orbital transformation device comprises:
The method according to claim 1,
The eccentric rotation unit includes:
An eccentric member having a coupling hole coupled to the driving unit and a mounting hole having a central eccentricity formed on an opposite side with respect to a center of the coupling hole;
A bearing member inserted into the mounting hole and eccentrically installed; And
And an attachment member provided at the center of the bearing member and coupled with the friction portion.
3. The method of claim 2,
Wherein the eccentric distance (D) between the center of the coupling hole and the center of the mounting hole is in the range of 1 to 3 mm.
3. The method of claim 2,
Wherein the bearing member is fixed to the mounting hole by a first stop ring member,
And an engagement groove is formed in an inner circumferential surface of the mounting hole to engage with the first stop ring member.
3. The method of claim 2,
Wherein the mounting member is formed so that an end portion thereof protrudes from the bearing member,
The mounting member is prevented from being separated from the bearing member by the second stop ring member provided at the end portion,
Wherein an attachment groove portion in which the second stop ring member is provided is formed at an end of the attachment member.
6. The method of claim 5,
A mounting space formed at one side of the mounting hole so as to be narrower than a width of the mounting hole,
And an end portion of the attachment member and the second stop ring member are disposed in the installation space portion.

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