TWM459925U - Structure improvement of knife - Google Patents

Description

Tool improvement structure

This creation is related to the detachable chamfering cutter, especially a chamfering cutter with a shank and a cutter head respectively provided with a tightly joined chamfering cutter.

According to the conventional chamfering knife structure, as shown in FIG. 5, the cutter head 4 is fixed by a locking member 6 from the side thereof and fixed in one of the slots 51 of the shank 5, and During use, the cutter head 4 is driven by a processing machine to rotate the shank 5 to rotate synchronously and coaxially.

However, since the pressing direction of the locking member 6 is perpendicular to the direction in which the shank 5 drives the cutter head 4 to rotate, the torque generated by the moment of the rotation will cause the locking member 6 and the cutter head. The wear between the two causes the fixing force of the locking member 6 to the cutter head 4 to be insufficient, so that the shank 5 cannot synchronously rotate the cutter head 4, that is, the rotation of the shank 5 and the cutter head 4 is instantaneous. The time difference will affect the accuracy of the cutting operation after long-term use.

In view of this, how to solve the above problems is the primary problem that the creative office wants to solve. Therefore, the creators of this case finally have the creation of this creation after continuous hard work and trials.

The main purpose of the present invention is to provide a tool-improving structure, in which an axially-connected structure is respectively arranged on the end faces of the joints of the shank and the cutter head, so that the shank can be laterally slid The force drives the cutter head to rotate synchronously and coaxially.

For the purposes of the foregoing, the present invention provides a tool improvement structure, The utility model comprises a handle, one end of which is an insertion end, and an end face of the insertion end is provided with an opening facing outward, the slot is formed with a tapered section and a straight line inwardly from the opening. And a locking hole extending through the slot to the side edge of the insertion end of the shank; a cutter head having a cutting portion at one end and a joint end at the other end; An insertion portion corresponding to the slot is formed, and the insertion portion forms a tapered portion and a cylindrical portion corresponding to the tapered portion and the straight portion of the slot, and the cutting head is inserted The portion is inserted into the slot of the shank, and the cylindrical section is inserted into the straight section of the slot, and the tapered section is received on the tapered section of the slot, and is provided with a locking component Passing through the locking hole to press the insertion portion of the cutting head, thereby positioning the cutting head in the slot, wherein the end surface of the insertion end of the shank is provided along the circumference of the arbor a first protrusion extending toward the axial direction of the shank and spaced apart, and each interval between each adjacent first protrusion is defined as a first recess; at the joint end of the cutter head The end surface is provided with a plurality of second recesses which are axially concave and spaced apart toward the cutter head, and each of the adjacent second recesses is defined as a second protrusion; and the cutter head is inserted When the shank is disposed, each of the first protrusions extends into the second recess, and each of the second protrusions also extends into the first recess, and each of the protrusions and the recesses Tightly plugged into each other.

The above objects and advantages of the present invention are not to be understood in detail from the detailed description and the accompanying drawings. Of course, this creation allows for some differences in the arrangement of some parts or parts, but the selected examples It will be described in detail in this specification.

Referring to FIG. 1 to FIG. 3, a tool modification structure provided by the present invention includes a tool holder 1 and a cutter head 2, wherein one end of the tool holder 1 is an insertion end 11 at which the insertion is performed. The end face 110 of the end 11 is provided with a slot 13 with an opening 12 facing outward. The slot 13 is formed with a tapered section 131 and a straight section 132 inwardly from the opening 12, and is inserted into the handle 1 . In the embodiment, the outer diameter of the opening 13 of the slot 13 is smaller than the end surface 110 of the insertion end 11 of the shank 1 . Outer diameter.

a cutting head 2 having a cutting portion 20 at one end and a coupling end 21 at the other end. The end surface 210 of the coupling end 21 is provided with an insertion portion 22 correspondingly inserted into the slot 13, wherein The insertion portion 22 defines a tapered portion 221 and a cylindrical portion 222 corresponding to the tapered portion 131 and the straight portion 132 of the slot 13, and is inserted into the slot 13 by the cylindrical portion 222. Straight section 132 and the tapered section 221 is received in the tapered section 131 of the slot 13, the cutter head 2 is inserted into the slot 13 of the shank 1, and the side of the cylindrical section 222 The edge of the locking hole 14 is recessed with a groove 23 having a depth increasing toward the tapered portion 221, and is resisted by a locking member 3 passing through the locking hole 14 and extending into the groove 23. The insertion portion 22 of the head 2 positions the cutter head 2 in the slot 13 of the shank 1.

Furthermore, along the circumference of the end face 110 of the insertion end 11 of the shank 1 The edge ring is provided with a plurality of first protrusions 15 extending in the axial direction of the shank 1 and spaced apart. In this embodiment, each of the first protrusions 15 extends along the periphery of the end surface 110 to form an arc shape. And a substantially square block body extending along the axial direction of the shank 1, and the intervals between the adjacent first convex portions 15 are relatively square arc-shaped grooves, and are defined as one On the other hand, on the end surface 210 of the joint end 21 of the cutter head 2, a plurality of second recesses 24 are formed along the circumference of the cutter head 2 so as to be concavely and spaced apart in the axial direction of the cutter head 2, in this embodiment. Each of the second recesses 24 extends in a curved shape along the circumference of the end surface 210, and is recessed into a substantially square arc-shaped recess toward the axial direction of the cutter head 2, and between the adjacent second recesses 24 Each of the intervals is relatively a block-shaped block and is defined as a second protrusion 25.

With the above configuration, when the cutter is combined, the cutter head 2 is inserted into the slot 13 of the shank 1 with the insertion portion 22, and the first convex portion 15 of the shank 1 is provided. Each of the second recesses 24 corresponding to the cutter heads 2 respectively extend into the first recesses 16 of the shank 1 and correspondingly to the first recesses 16 of the shank 1. 15 and 25 and the recessed portions 16 and 24 are closely inserted into each other as shown in Fig. 4, whereby when the cutting operation is performed using the cutter, all the line directions are generated at the moment when the shank 1 is rotated at a high speed. Torque force, the torque will be applied to the second concave portions 24 of the cutter head 2 by the first convex portions 15 of the shank 1, and the cutter head 2 is pushed to rotate, and the shank 1 and the cutter head are The 2 series is in a tightly inserted state, so that the rotation of the shank 1 can synchronously and coaxially push the cutter head 2 to rotate without causing the fastener 3 to suffer any friction loss, so as to avoid long-term use. Will produce the cutter head 2 loose and drop The disadvantage of low job accuracy.

However, the above description of the embodiments is intended to illustrate the present invention and is not intended to limit the present invention, so the replacement of equivalent elements should still be within the scope of the present invention.

In summary, this creation has been quite progressive and practical, and after detailed description above, it can be made clear to the skilled person that the creation can achieve the above objectives, and it has already met the requirements of the Patent Law. The creator filed an application in accordance with the law.

(this part of the creation)

1‧‧‧Knife

11‧‧‧Interface

110‧‧‧ end face

12‧‧‧ openings

13‧‧‧ slots

131‧‧‧Constriction

132‧‧‧ Straight section

14‧‧‧Lock hole

15‧‧‧First convex

16‧‧‧First recess

2‧‧‧ cutter head

20‧‧‧cutting department

21‧‧‧Binding end

210‧‧‧ end face

22‧‧‧Internal Department

221‧‧‧Cone section

222‧‧‧ cylindrical section

23‧‧‧ Groove

24‧‧‧Second recess

25‧‧‧second convex

3‧‧‧Locker

(customized part)

4‧‧‧ cutter head

5‧‧‧Knife

51‧‧‧ slots

6‧‧‧Locker

Figure 1 is a three-dimensional exploded view of the creation

Figure 2 is a three-dimensional combination diagram of the creation

Figure 3 is a partial cross-sectional view of the creation

Figure 4 is a schematic cross-sectional view of the A-A direction in Figure 3

Figure 5 is a partial cross-sectional view of a conventional chamfering knife

1‧‧‧Knife

11‧‧‧Interface

110‧‧‧ end face

12‧‧‧ openings

13‧‧‧ slots

131‧‧‧Constriction

132‧‧‧ Straight section

14‧‧‧Lock hole

15‧‧‧First convex

16‧‧‧First recess

2‧‧‧ cutter head

20‧‧‧cutting department

21‧‧‧Binding end

210‧‧‧ end face

22‧‧‧Internal Department

221‧‧‧Cone section

222‧‧‧ cylindrical section

23‧‧‧ Groove

24‧‧‧Second recess

25‧‧‧second convex

3‧‧‧Locker

Claims (4)

The utility model relates to a tool improved structure, which comprises: a handle, one end of which is an insertion end, and an end face of the insertion end is provided with an opening facing outward, and the slot is formed inwardly from the opening inwardly. a constricted section and a straight section, and a locking hole penetrating into the slot is provided at a side edge of the insertion end of the shank; a cutter head having a cutting portion at one end and a joint end at the other end; The insertion end portion is provided with an insertion portion corresponding to the slot, and the insertion portion forms a tapered portion and a cylindrical portion corresponding to the tapered portion and the straight portion of the slot, and the blade is formed The head portion is inserted into the slot of the shank with the insertion portion thereof, and the cylindrical portion is inserted into the straight portion of the slot, and the tapered portion is received on the tapered portion of the slot And pressing a locking piece through the locking hole to press the insertion portion of the cutting head, thereby positioning the cutting head in the slot, wherein the end surface of the insertion end of the shank is A plurality of first convex portions extending toward the axial direction of the shank and spaced apart are disposed along the circumference ring thereof, and each interval between the adjacent first convex portions is defined as a first a second concave portion that is axially concave and spaced apart toward the cutter head on the end surface of the joint end of the cutter head, and each interval between each adjacent second recess is defined as a first When the cutting head is inserted into the shank, each of the first convex portions protrudes into the corresponding second concave portion, and each of the second convex portions also extends into the corresponding first concave portion, and Each of the convex portions and each of the concave portions are in a state of being closely interposed. According to the tool improvement structure described in item 1 of the patent application scope, wherein The locking hole penetrates into a straight section of the slot. The tool modification structure according to the first aspect of the invention, wherein the side edge of the cylindrical portion of the cutter head is further recessed with a groove having a depth increasing toward the tapered portion, and the fastener passes through the lock. The hole is fixed and protrudes into the groove to press against the cylindrical section of the cutter head. The tool modification structure according to the first aspect of the invention, wherein the outer diameter of the slot opening is smaller than the outer diameter of the end surface of the shank insertion end.