KR200237838Y1 - Joint structure of diamond grinder - Google Patents

Abstract

The present invention is a device for fastening structure between a shank and a rotating body for fastening the shank in a diamond polishing tool, and is a device for a fastening structure that is easy to attach and detach without damage to the fastening portion and can be firmly fastened. .

Description

Joint structure of diamond grinder

The present invention is a design for the fastening structure of the diamond abrasive tool, the diamond abrasive tool is usually used to polish the surface of a high-strength object, and the abrasive tool implemented in the present invention is a natural marble or Grinding tool used to smoothly polish the surface of artificial marble, etc. on the floor of a building, which is generally a shank in which a number of tips sintered with diamond powder are integrally formed, and a rotating body for fastening and fixing the shank. And a driving part to which the motor and the like are coupled to the rotating body to rotate the rotating body, and the present invention is a grinding tool for grinding the surface of the rotating body and the direct object with the driving portion such as a motor shaft. It is a design for a fastening structure that allows a fastening with a shank to be attached and detached, and a solid fastening. The fastening structure of the diamond polishing tool for the purpose of this purpose is to project a dolwon (2) of constant height smaller than the diameter of the rotating body (1) in the form of a circular disk of a predetermined diameter connected to a drive shaft, such as a motor, The triangular engaging pieces (3) (3a) of the dogs (two left and right on the drawing) are formed horizontally, and a predetermined insertion space is provided between the triangular engaging pieces (3) (3a) and the upper surface of the rotating body (1). (4), and a circular insertion hole 6 having a diameter (slight clearance allowed) equal to the diameter of the circumferential source 2 of the rotating body 1 is laid under the ring-shaped shank 5, and this insertion hole ( 6) The triangular engaging pieces 3b and 3c are formed on the inner circumferential thickness portion 7 in the opposite direction to the position of the triangular engaging pieces 3 and 3a formed on the rotating body 1, thereby forming the rotating body ( Insert the lower part of the shank 5 into 1), and then rotate the shank 5 in a predetermined direction to rotate the triangular engaging pieces 3b and 3c formed in the inner circumferential thickness of the shank 5. (1) The triangular engaging pieces 3b and 3c of the shank 5 are inserted into the insertion spaces 4 provided on each lower surface of the triangular engaging pieces 3 and 3a protruding from the upper surface of the dolwon 2 of the upper surface. Each triangular engaging piece (3) (3a) (3b) (3c) has a structure that is fastened to each other by fastening, when separating the shank (5) by rotating in the reverse direction of the fastening direction is simply separated.

The conventional polishing tool configured as described above has a relatively thin and protruding thickness of each triangular engaging piece (3) (3a) (3b) (3c) and is easily broken or shank (5) by reverse rotational inertia when rotating at a high speed. There was a problem such as easily separated.

1 is a perspective view showing the conventional diamond abrasive ball fastening part and the rotating body disassembled

Figure 2 is a perspective view showing the diamond abrasive ball fastening portion and the rotating body is implemented according to the present invention

Figure 3 is a partial perspective view showing a state in which the diamond polishing sphere is implemented in accordance with the present invention to the rotating body

<Code Description of Main Parts of Drawing>

1,10. Rotating body 5,20. Shank

11. Round head 12. Round protrusion

13. Interlocking 21. Lower Disc

22. Circular peripheral wall 23. Diamond sintered tip

24. Insertion hole 25. Circular arc groove

The present invention solves the problems of the conventional shank (5) and the rotating body (1) and is designed to be a simple but robust fastening and detachment bar, when described in detail based on the accompanying drawings As follows.

On the upper surface of the circular disk-shaped rotating body 10, a plurality of (four in the drawing) longitudinal sections have a circular head 11 having a constant diameter having a substantially 'T' shape, and a predetermined height below the center of the circular head 11. The interlocking protrusions 12, which are formed by protruding circular protrusions 12, are integrally formed with the upper surface of the rotating body 10, and the shank 20 fastened by the interlocking passages 13 is the lower disc 21. The lower disc of the shank 20 in which the circular circumferential wall 22 is installed at a predetermined height and thickness on the outer side, and a plurality of known diamond sintering tips 23 are integrally addressed on the upper surface of the circular circumferential wall 22 ( 21, the circular head 11 of the interlocking portion 13 protruding from the rotating body 10 is drilled a plurality of insertion holes 24 (four in the figure) of the diameter through which the insertion can be freely inserted. On one side of the circular arc groove 25 in the same width as the diameter of the circular projection 12 of the locking interval 13 protruding from the rotating body 10 By constructing the structure of the shank 20 by speaking to be opened in a predetermined length in the same circumferential direction as one side of each insertion hole 24, the structure of the fastening portion of the polishing tool is implemented according to the present invention, if necessary The lower disc 21 of the shank 20 each circular head 11 provided in the interlocking section 13 of the rotating body 10 when fastening the shank 20 carried out in accordance with the present invention to the whole (10) After inserting it completely into the insertion hole 24 installed in the hole, the shank 20 is rotated in the direction of the arc groove 25. As shown in FIG. 3, the circular shape of the interlocking portion 13 in the arc groove 25 is shown in FIG. 3. The protrusion 12 is inserted so that the bottom surface of the circular head 11 of the stop 13 is locked to the upper surface of the lower disc 21 of the shank 20 so that the shank 20 and the rotating body 10 are fastened.

As described above, since the fastening portion of the polishing tool implemented according to the present invention has a relatively large contact surface between each circular recess 25 and the circular protrusion 12 of the shank 20, the contact surface is firmly fastened and the shank ( When the counterclockwise rotation is performed, the shank 20 can be detached from the rotor 10 immediately, so that the shank 20 can be detached and detached freely, and since the stop 13 and the arc groove 25 are relatively rear, there is no damage. It can be used for a long time.

Claims (1)

In constituting the fastening portion of the diamond polishing tool, a plurality of locking sections 13 in which the circular head 11 and the circular protrusion 12 extend upward and downward are projected on the upper surface of the circular rotating body 10. A plurality of insertion holes 24 are laid in the lower disc 21 of the shank 20 which is fastened to the whole 10, and each of the insertion holes 24 has a circular groove 25 having a predetermined width and length. By speaking and laying down in the same circumferential direction, the circular head 11 provided in the interlocking portion 13 of the rotating body 10 is locked to the circular groove 25 of the shank 20 so that the rotating body 10 and the shank are held. Structure of the fastening portion of the diamond grinding tool (20) is fastened.