KR102560353B1 - Removable grinding device for jig - Google Patents

Abstract

According to the present invention, a detachable grinding device for a jig comprises: a rotary shaft attached to and detached from a rotating motor, and integrally rotated by the torque; a fixed part separated from the rotating motor to be fixed; a cover part penetrated by the rotary shaft, and provided to be attached to and detached from the fixed part; an eccentric part detachably coupled to a lower portion of the rotary shaft, integrally rotated with the rotation of the rotary shaft, and rotating eccentrically; and a grinding part coupled to the eccentric part, causing front, rear, left, and right movements based on the rotary shaft by the eccentric rotation, and grinding a workpiece by the movements. The present invention has the effect of providing a detachable grinding device for a jig which can be used after being attached to and detached from an electric tool having a rotating motor with high-speed rotation and excellent torque as needed, expands grinding surfaces due to high performance, and completes sanding work in a short period of time to improve work efficiency.

Description

Removable grinding device for jig}

The present invention relates to a detachable polishing device for a jig.

In general, a grinder refers to a machine that smoothly grinds metal, wood, stone, etc., and many types of grinders have been developed.

A conventional polishing machine is a machine capable of polishing a protruding or not beautiful part of a workpiece such as metal, wood, stone, vermiculite board, or the like.

In addition, for polishing, sandpaper having a large particle to a smaller particle may be used, and the surface roughness of the workpiece may be finely trimmed step by step.

For example, a conventional polishing machine may perform sanding by bringing sandpaper rotating together with a rotating shaft of a rotary motor into close contact with the workpiece in a state where the workpiece is fixed. And, a handle was provided to move the grinder.

Since the user moves after gripping the handle, it is difficult to manufacture it with high weight, making it difficult to use a high-performance rotary motor made of high weight. Because of this, there is a inconvenience in that the processing area is small and the sanding operation is performed for a long time by using a low-performance rotary motor.

In addition, since the conventional polishing machine can replace sandpaper and other parts are integrally provided, it cannot be attached to or detached from a high-performance power tool that can be used by connecting various working tools.

Here, a high-performance power tool means that the output of the rotary motor is high.

Accordingly, there is a need for a polishing jig that can be attached to and detached from a power tool such as a router (router) made of a high-performance rotary motor to enlarge the processing area and perform a sanding operation in a short time.

Republic of Korea Patent Publication 10-2021-0026998 Republic of Korea Patent Publication 10-2018-0065863

An object of the present invention, which was made to solve the above problems, is to provide a detachable jig polishing device that can be detached and used as needed for a power tool having a rotary motor with high speed rotation and excellent rotational power, and can expand the polishing processing area due to high performance and improve the work rate by completing the sanding operation in a short time.

According to the detachable polishing device for a jig of the present invention for achieving the above object, the rotary shaft is attached to and detachable from a rotary motor and is integrally rotated by the rotary force; A fixing part fixed and spaced apart from the rotation motor; a cover portion through which the rotating shaft passes, and which is detachably provided to the fixing portion; An eccentric portion detachably coupled to the lower portion of the rotation shaft and rotating integrally with the rotation of the rotation shaft but rotating eccentrically; and a polishing unit coupled to the eccentric unit, generating front and rear and left and right movements relative to the rotational axis by the eccentric rotation, and polishing the workpiece by the movement.

In addition, the fixing portion is provided to be spaced apart from the bottom of the rotary motor, the upper fixing plate is formed with a first through-hole penetrating in one direction; a coupling bar coupled to the first through hole; A fixing cover that surrounds one end of the coupling bar and both sides are coupled to the cover part to fix the coupling bar.

In addition, the eccentric portion is integrally coupled to the lower portion of the rotating shaft, the rotary weight capable of applying a centrifugal force to the rotation of the rotating shaft; and an eccentric weight integrally coupled to an end of the rotation shaft so as to be eccentric and rotating eccentrically in relation to the rotation of the rotation shaft, wherein the polishing unit includes: an attachment plate; a buffer plate provided on the upper side of the attachment plate; a lower fixing plate provided on the upper side of the buffer plate; A connection plate provided on the upper side of the lower fixing plate and rotatably coupled to the eccentric weight.

In addition, the cover part and the polishing part are provided to be spaced apart from each other, connect the cover part and the polishing part, and a shock absorber preventing movement of the polishing part from being transferred to the cover part; further includes.

In addition, the buffer unit may include an elastic member provided on a lower side of the cover unit and an upper side of the polishing unit, respectively; a first bearing provided to the elastic member; a connection shaft having upper and lower ends rotatably coupled to the first bearing; And an elastic spring provided when surrounding the connecting shaft, wherein the connecting shaft rotates by the front and rear and left and right movements of the polishing unit and prevents the transfer of the movement of the polishing unit to the cover unit, and the elastic spring is characterized in that the external force generated by the front and rear and left and right movements of the polishing unit is minimized so that it is not transmitted to the connecting shaft, so that maintenance of the connecting shaft is facilitated.

As described above, the effects of the present invention can be used after attaching and detaching as needed to a power tool having a rotary motor with high speed rotation and excellent rotational force, and due to high performance, the polishing area is enlarged and the sanding operation is completed in a short time.

1 is a cross-sectional view showing a polishing device for a detachable jig according to a preferred embodiment of the present invention.
2 is a plan view showing a polishing device for a detachable jig according to a preferred embodiment of the present invention.
3 is a cross-sectional view showing A-A'.
4 is a cross-sectional view showing BB'.
5 is a plan view showing a rotating weight of a polishing device for a detachable jig according to a preferred embodiment of the present invention.
6 is a plan view showing a polishing unit of a detachable jig polishing device according to a preferred embodiment of the present invention.
7 and 8 are cross-sectional views showing a shock absorber of a detachable polishing device for a jig according to a preferred embodiment of the present invention.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments are provided to complete the disclosure of the present invention and to fully inform those skilled in the art of the scope of the invention to which the present invention belongs, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

Hereinafter, the present invention will be described with reference to drawings for explaining a polishing device for a detachable jig according to embodiments of the present invention.

Referring to FIG. 1 , the detachable polishing device for a jig according to the present invention includes a rotating shaft 10, a fixing part 20, a cover part 30, an eccentric part 40, and a polishing part 50.

First, the rotary shaft 10 is attached to and detached from the rotary motor 11 and is integrally rotated by the rotational force of the rotary motor 11 .

At this time, the rotary motor 11 may be a power tool capable of connecting tools such as an electric drill, an electric screwdriver for tightening or loosening screws, an electric saw for cutting wood, and an electric planer for trimming wood after the rotary shaft 10 is separated. In addition, the tool may be provided with the rotary shaft 10 of the present invention.

That is, the rotary motor 11 may include a tightening unit capable of attaching and detaching the rotary shaft 10 and tightening the coupled rotary shaft 10 .

Referring to FIG. 2 , the fixing part 20 is spaced apart from the rotary motor 11 and fixed.

At this time, the fixing part 20 may be coupled to the spacer bar 12 so that it can be fixed in a state spaced apart from the rotation motor 11 .

A cover part 30 to be described later may be provided below the fixing part 20 . At this time, the cover part 30 can be stably fixedly coupled by the fixing part 20 .

In addition, the fixing part 20 may include an upper fixing plate 21, a coupling bar 24, and a fixing cover 25.

The upper fixing plate 21 is provided to be spaced apart from the bottom of the rotary motor 11 and has a first through hole 22 penetrating in one direction.

At this time, the first through hole 22 may be formed to penetrate in one direction on both sides of the rotation shaft 10 as the center.

In addition, the upper fixing plate 21 and the cover portion 30 may be fixedly coupled with the first fixing means 23 so that they can be integrally coupled. The fixing means may include bolts, nuts and washers.

Referring to FIGS. 3 and 4 , the coupling bar 24 is inserted into and coupled to the first through hole 22 .

The fixing cover 25 surrounds one end of the coupling bar 24 and both sides are coupled to the cover unit 30 to fix the coupling bar 24 . At this time, the fixing cover 25 and the cover part 30 may be integrally coupled with the second fixing means 26 .

The cover part 30 is provided through which the rotating shaft 10 passes, and is detachably attached to the fixing part 20 .

The cover part 30 includes a cover plate 31 , an extension member 33 and a coupling part 34 .

First, the cover plate 31 is formed with a second through hole 32 through which the rotating shaft 10 passes. And, the outer end of the cover plate 31 is bent downward to form a space in which a polishing unit 50 to be described later can be provided. At this time, the cover plate 31 can protect the polishing unit 50 from the outside, and can prevent dust being polished from being discharged to the outside.

The extension member 33 is coupled so that the bent lower end of the cover plate 31 is extended, and dust generated by polishing can be prevented from being discharged to the outside. At this time, the extension member 33 may be made of soft material.

The coupling part 34 is rotatably coupled to the rotating shaft 10 and may be integrally provided with the cover part 30 . At this time, a second bearing 35 coupled with the rotation shaft 10 may be provided so that only the rotation shaft 10 can rotate smoothly.

In addition, the coupling part 34 may be integrally coupled to the cover part 30 by the third fixing means 36 .

In addition, the cover part 30 may be formed with a suction port 37 to which a suction pipe for sucking in dust is coupled.

The eccentric portion 40 is detachably coupled to the lower portion of the rotating shaft 10, and rotates integrally with the rotation of the rotating shaft 10, but rotates eccentrically.

Here, the eccentric portion 40 may include a rotary weight 41 and an eccentric weight 43 .

Referring to FIG. 5 , the rotary weight 41 is integrally coupled to the lower portion of the rotary shaft 10 and may apply centrifugal force to the rotation of the rotary shaft 10 .

At this time, the rotary weight 41 may be formed with a cutout groove 42 in which a part is cut so that centrifugal force can be generated.

The eccentric weight 43 is integrally coupled to the end of the rotation shaft 10 to be eccentric, and rotates integrally with the rotation of the rotation shaft 10, but performs eccentric rotation. At this time, as shown in FIG. 6 , the eccentric weight 43 may be moved upward by a distance D from the center point of the rotation shaft 10 and integrally coupled to the rotation shaft 10 .

The polishing unit 50 is coupled to the eccentric unit 40, so that back and forth and left and right movements occur with respect to the rotation shaft 10 by eccentric rotation, and the workpiece can be polished by the movement.

That is, the polishing part 50 is coupled to the eccentric part 40, but only the eccentric part 40 is coupled to the third bearing 55 so that only the eccentric part 40 can rotate, so that the polishing part 50 does not rotate, and the eccentric weight 43 is eccentric from the rotation shaft 10.

6, for example, when the eccentric weight 43 rotates the central axis 10 'of the rotation shaft 10 by 90 degrees in the reference clockwise direction, the polishing unit 50 moves as much as the eccentric weight 43 rotates. At this time, the polishing unit 50 does not rotate integrally with the eccentric weight 43 by the third bearing 55, but moves or rotates back and forth with respect to the central axis 10 'of the rotation shaft 10 in a fixed state.

In addition, the eccentric weight 43 may be integrally coupled to the rotary shaft 10 by a fourth fixing means 44 that is inserted into the lower end of the rotary shaft 10 and screwed together. That is, the eccentric weight 43 may be fixed between the rotary weight 41 and the fourth fixing means 44 and rotate integrally with the rotary shaft 10 .

On the other hand, the polishing unit 50 includes an attachment plate 51, a buffer plate 52, a lower fixing plate 53 and a connecting plate 54.

The attachment plate 51 is covered with sandpaper. At this time, the attachment plate 51 may be formed of Velcro tape. Accordingly, it is possible to facilitate replacement or replacement of sandpaper with different particle sizes. At this time, the attachment plate 51 may be made of sandpaper.

The buffer plate 52 is provided on the upper side of the attachment plate 51 . The buffer plate 52 can mitigate impact generated during the sanding operation. At this time, the buffer plate 52 may be made of a rubber plate, but is not limited thereto.

The lower fixing plate 53 is provided on the upper side of the buffer plate 52 . In addition, a connection plate 54 and a shock absorber 60 to be described below may be provided on the upper side of the lower fixing plate 53 .

The connection plate 54 is provided on the upper side of the lower fixing plate 53, the eccentric weight 43 is rotatably coupled, and moves back and forth with respect to the rotation shaft 10 together with the eccentric weight 43. At this time, the connecting plate 54 is integrally coupled with the lower fixing plate 53 by the fifth fixing means 56 .

That is, the center of the connecting plate 54 is formed through, the third bearing 55 is provided at the center, and the eccentric weight 43 is rotatably provided at the center of the third bearing 55. And the eccentric weight 43 is eccentrically coupled to the rotating shaft 10. Accordingly, only the eccentric weight 43 is rotated by the third bearing 55, and the connecting plate 54 is moved back and forth and left and right by the rotating eccentric weight 43.

At this time, the polishing unit 50 including the connecting plate 54 that moves back and forth and left and right causes forward and backward and left and right movements as a whole.

That is, the polishing unit 50 moves forward, backward, left and right by the eccentric rotation of the eccentric weight 43, as shown in the dotted-dot chain line shown in FIG. 6, by a distance D. As this movement is repeated, the workpiece can be sanded with sandpaper.

Meanwhile, the cover part 30 and the polishing part 50 may be connected and coupled to a buffer part 60 to be described later, and may be provided to be spaced apart from each other.

That is, as shown in FIG. 7 , the buffer unit 60 connects the cover unit 30 and the polishing unit 50 and prevents the movement of the polishing unit 50 from being transferred to the cover unit 30 .

The buffer unit 60 includes an elastic member 61, a first bearing 62, a connecting shaft 63, and an elastic spring 65.

The elastic member 61 is provided on the lower side of the cover part 30 and the upper side of the polishing part 40, respectively. In addition, it may be made of a rubber material capable of mitigating impact. In particular, a connection shaft 63 to be described later may be tilted according to the movement of the polishing unit 50 due to contraction of the elastic member 61 .

The first bearing 62 is provided on the elastic member 61 . At this time, the first bearings 62 are provided on the top and bottom, respectively. At this time, the first bearing 62 can rotate only the connecting shaft 63 to be described later.

The upper and lower ends of the connecting shaft 63 are rotatably coupled to the first bearing 62, respectively.

At this time, the connection shaft 63 is rotated by the back and forth and left and right movements of the polishing unit 50 .

In addition, the upper part of the connecting shaft 63 is connected to the cover part 30, and the lower part is connected to the polishing part 50. Here, the lower part of the connecting shaft 63 is moved by the moving polishing part 50, but the upper part is fixed by the fixed cover part 30 so that the connecting shaft 63 is inclined.

That is, the cover part 30 and the polishing part 50 are connected through the first bearings 62 provided above and below the connecting shaft 63, and at the same time, the movement of the polishing part 50 can be blocked without being transmitted to the cover part 30 due to the rotation of the connecting shaft 63 by the first bearing 62.

Here, in the shock absorber 60, a barrier 64 may be formed outside the first bearing 62 so that the first bearing 62 can be inserted and fixed.

In addition, referring to FIG. 8, the elastic spring 65 is provided to surround the connecting shaft 63, that is, the prevention wall 64, and has an upper end of the lower surface of the cover plate 31 and a lower end of the lower fixing plate 53. It can be elastically supported on the upper surface of each. That is, the elastic spring 65 is provided between the cover plate 31 and the lower fixing plate 53, so that the compression of the connecting shaft 63 can be minimized while maintaining the distance between the cover plate 31 and the lower fixing plate 53 even when an external force generated by the back and forth and left and right movements of the polishing unit 40 is applied.

Accordingly, the shock transmitted to the connecting shaft 63 can be alleviated, and maintenance of the connecting shaft 63 can be very easy.

In addition, since the shock absorbing part 60 is provided in plurality and supports the polishing part 50 from the fixed cover part 30, the polishing part 50 of the polishing part 50 can be evenly formed as a whole.

Therefore, in the detachable polishing device for a jig according to the present invention, only the polishing part 50 moves back and forth, left and right, so that the polishing area can be expanded using the rotary motor 11 with excellent output, and the user holding the rotary motor 11 can perform sanding while receiving the movement of the polishing part 50 to a minimum. In addition, by minimizing movement, it is possible to reduce user's fatigue and increase work efficiency.

Those skilled in the art to which the present invention pertains will understand that the present invention can be embodied in other specific forms without changing its technical spirit or essential features. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof should be construed as being included in the scope of the present invention. In addition, the operation order of the components described in the above-described process does not necessarily have to be performed in a time-series order, and even if the order of performing each component and step is changed, as long as the gist of the present invention is met, these processes can fall within the scope of the present invention. Of course.

10: rotation axis 11: rotation motor
12: separation bar 20: fixing part
21: upper fixing plate 22: first through hole
23: first fixing means 24: coupling bar
25: fixing cover 26: second fixing means
30: cover part 31: cover plate
32: second through hole 33: extension member
34: coupling part 35: second bearing
36: third fixing means 37: inlet
40: eccentric part 41: rotating weight
42: incision groove 43: eccentric weight
44: fourth fixing means 50: polishing part
51: attachment plate 52: buffer plate
53: lower fixing plate 54: connecting plate
55: third bearing 60: buffer
61: elastic member 62: first bearing
63: connecting shaft 64: barrier

Claims (5)

A rotational shaft attached to and detached from the rotational motor and rotated by the rotational force of the rotational motor;
A fixing part fixed and spaced apart from the rotation motor;
a cover portion through which the rotating shaft passes, and which is detachably provided to the fixing portion;
An eccentric portion detachably coupled to the lower portion of the rotation shaft and rotating integrally with the rotation of the rotation shaft but rotating eccentrically; and
A polishing unit coupled to the eccentric unit, generating front and rear and left and right movements with respect to the rotational axis by the eccentric rotation, and polishing the workpiece by the movement;
the fixing part,
an upper fixing plate provided to be spaced apart from the lower part of the rotary motor and having a first through hole passing through in one direction;
a coupling bar coupled to the first through hole;
A detachable jig polishing device including a fixing cover that surrounds one end of the coupling bar and both sides are coupled to the cover part to fix the coupling bar.
delete According to claim 1,
The eccentric part,
a rotating weight integrally coupled to a lower portion of the rotating shaft and capable of applying a centrifugal force to rotation of the rotating shaft; and
Including; eccentric weight integrally coupled to the end of the rotating shaft and rotating eccentrically with the rotation of the rotating shaft,
The polishing part,
attachment plate;
a buffer plate provided on the upper side of the attachment plate;
a lower fixing plate provided on the upper side of the buffer plate;
A detachable jig polishing device including a connection plate provided on the upper side of the lower fixing plate and rotatably coupled to the eccentric weight.
According to claim 1,
The cover part and the polishing part are provided to be spaced apart from each other,
A detachable polishing device for a jig further comprising a buffer unit connecting the cover unit and the polishing unit and preventing movement of the polishing unit from being transmitted to the cover unit.
According to claim 4,
The buffer unit,
elastic members respectively provided on the lower side of the cover part and the upper side of the polishing part;
a first bearing provided to the elastic member;
a connection shaft having upper and lower ends rotatably coupled to the first bearing; and
Including; an elastic spring provided when surrounding the connecting shaft;
The connecting shaft rotates by the front and back and left and right movements of the polishing unit and prevents the movement of the polishing unit from being transmitted to the cover unit,
The elastic spring is a detachable polishing device for a jig, characterized in that the maintenance of the connecting shaft is facilitated by minimizing the external force generated by the front and rear and left and right movements of the polishing unit so that it is not transmitted to the connecting shaft.

Images