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Composite drill bit

A compound drill bit and hollow drill bit technology, which is applied in the direction of drill repair, drilling tool accessories, drilling/drilling equipment, etc., can solve the problems of high cost, complex structure, heavy weight, etc., achieve low price, reduce manufacturing cost, and produce high efficiency effect

Active Publication Date: 2013-03-27
RUGAO OUTONG MACHINERY FITTINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of this traditional drill bit are: its structure is relatively complicated, and the manufacturing process is relatively cumbersome; in addition, its drill shank, drill bit and twist drill are all made of metal, which is heavy in weight and high in cost.

Method used

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  • Composite drill bit
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0017] Figure 2 to Figure 4 A first embodiment of the invention is shown, in which figure 2 It is a structural schematic diagram of the first structure of the present invention; image 3 yes figure 2 An exploded view of the composite drill bit shown; Figure 4 yes figure 2 An exploded view of the composite bit shown when viewed from another angle.

[0018] Present embodiment is a kind of composite drill bit, see Figure 2 to Figure 4 As shown, it includes a drill shank 1 and a twist drill 3, the twist drill 3 is made of metal, and the twist drill 3 includes a fixing part 31 connected to the drill shank 1 and a cutting part 32 away from the drill shank 1; The shank 1 is made of plastic, and includes an injection molding connection part 11 connected to the hollow drill bit 2 and a mounting part 12 away from the end of the hollow drill bit 2; the fixing part 31 of the twist drill bit is located at the center of the injection molding connection part 11 of the drill shank,...

Embodiment 2）

[0021] Figure 5 to Figure 7 A second embodiment of the invention is shown, Figure 5 It is a structural schematic diagram of the second structure of the present invention; Figure 6 yes Figure 5 An exploded view of the composite drill bit shown; Figure 7 yes Figure 5 An exploded view of the composite bit shown when viewed from another angle.

[0022] Present embodiment is a kind of composite drill bit, see Figure 5 to Figure 7 Shown, comprise drill handle 1, hollow drill bit 2 and twist drill bit 3, described hollow drill bit 2 and twist drill bit 3 are made of metal, twist drill bit 3 and hollow drill bit 2 are arranged on the same end of drill handle 1, and twist drill bit 3 is positioned at At the center of the hollow drill bit 2; the hollow drill bit 2 includes a tubular base body 21, a cutting tooth 22 arranged at the bottom end of the tubular base body 21 and a linkage part 23 located in the tubular base body 21; part 31 and the cutting part 32 away from the d...

Embodiment 3）

[0027] Figure 8 and Figure 9 A third embodiment of the invention is shown, in which Figure 8 It is a structural schematic diagram of the third structure of the present invention; Figure 9 yes Figure 8 An exploded view of the compound bit shown.

[0028] This embodiment is basically the same as Embodiment 2, the difference is: see Figure 8 and Figure 9 , the drill shank 1 is also provided with a circular reinforced sealing plate 15 for encapsulating the hollow drill 2 linkage portion 23 at the end of its linkage gear 13 away from the drill shank mounting part 12, and the reinforced sealing plate 15 is located at In the inner hole of the tubular base body 21 of the hollow drill bit 2, the interlocking gear 13 is located in the cavity formed by the reinforcing tube 14 and the reinforcing sealing plate 15, and each gear tooth 131 in the interlocking gear 13 is far away from the end of the shank mounting part 12. It is connected with the reinforced sealing plate 15.

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PUM

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Abstract

The invention discloses a composite drill bit, which comprises a drill handle, a hollow bit and an auger bit, wherein the hollow bit and the auger bit are made of metal, and arranged at the same end of the drill handle; and the auger bit is positioned in the center of the hollow bit. The composite drill bit is characterized in that the drill handle is made of plastic, and is produced into one piece with the hollow bit and the auger bit in an injection molding formation mode. According to the composite drill bit, the drill handle is made of plastic, and can achieve the same technical effect as the traditional drill bit made of metal, the materials are low in price, and the production efficiency is higher, so that the manufacture cost can be effectively reduced.

Description

technical field [0001] The present invention relates to the technical field of drill bit structure design, and in particular relates to a composite drill bit. Background technique [0002] attached figure 1 It is a cross-sectional view of a traditional drill bit, which includes a drill shank (91), a hollow drill bit (92), a twist drill (93) and a fastening screw (94); a blind hole is provided at the center of one end of the drill shank ( 911), the outer peripheral wall of this end is provided with an external thread connection part (912), and a fastening hole (913) communicating with the blind hole is provided on the drill shank body; the hollow drill bit is screwed and fixed on the outer surface of the drill shank. On the threaded connection part, one end of the twist drill is located in the blind hole of the drill shank as a fixed end, and the other end is used as a cutting end to protrude from the blind hole and is higher than the hollow drill bit; the fastening screw is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B51/00
Inventor 胡妍
Owner RUGAO OUTONG MACHINERY FITTINGS