CN210359429U - Drill bit convenient to chip removal - Google Patents

Abstract

A drill bit convenient for chip removal comprises a drill body, a drill handle and a drill cutter, wherein the drill body and the drill handle are of an integrated structure, the outer diameter of the drill body is larger than that of the drill handle, the drill cutter is embedded at the end part of the drill body, a chip removal groove with a spiral structure is formed in the drill body along the circumference of the surface, the drill handle is cut off towards the direction of the drill body along the surface of the drill handle, and the bottom of the chip removal groove is communicated with the surface of the drill handle; compared with the prior art, the drill handle is cut off towards the drill body along the surface of the drill handle, so that the length of the drill body is shortened, the bottom of the chip groove is directly communicated with the surface of the drill handle, and during deep hole operation, under the centrifugal action of high-speed rotation of the drill bit, the chips are discharged out of the deep hole along the direction of the drill handle of the chip groove, so that the chips are prevented from being blocked in the chip groove, and the abrasion of the chips to the drill bit is reduced.

Description

Drill bit convenient to chip removal

Technical Field

The utility model relates to an electric hammer drill bit field indicates a drill bit convenient to chip removal especially.

Background

The main body of the hard alloy electric hammer drill bit is made of high-quality alloy steel, is matched with various electric hammers for use, is suitable for drilling on hard building materials such as concrete, bricks and the like, and is a drilling tool with wide application and high efficiency in the building and installation industries.

Referring to fig. 1, a conventional electric hammer drill includes a drill body, a drill shank, and a drill bit, wherein the drill body and the drill shank are integrated, the drill bit is embedded in an end portion of the drill body, a cutting edge is provided along a surface of the drill body, the cutting edge is spiral, a chip discharge groove is formed between the cutting edges, generally, an outer diameter of the drill body is larger than an outer diameter of the drill shank, a front end of the chip discharge groove is connected to the drill bit, the chip discharge groove extends along the drill body, and a rear end of the chip discharge groove is stopped at a distal end of the drill body.

The chip removal process of the electric hammer drill bit is to guide the chips to the outside of the hole through the chip removal groove, the chips are thrown out of the hole due to the centrifugal effect, the adaptability of the existing electric hammer drill bit for deep hole operation is poor, when a drill hole reaches a certain depth, the whole drill body enters the hole together through the chip removal groove, the chips are transmitted from the front end to the rear end of the chip removal groove, excessive steps exist on the surface of the chip removal groove and the surface of the drill body, the chips are blocked in the chip removal groove easily, and the chips are difficult to discharge out of the hole, so that the chips are discharged badly, and the drill bit is abraded.

Disclosure of Invention

In order to solve the problem, the utility model provides an electric hammer drill bit that is adapted to deep hole operation, including boring the body, drillstock, brill sword, bore the body and drillstock structure as an organic whole, the external diameter of boring the body is greater than the external diameter of drillstock, the gomphosis of brill sword is at the tip of boring the body, the chip groove of helical structure is seted up along surface circumference to the brill body, the drillstock is along the drillstock surface towards the excision of drillstock direction, makes chip groove tank bottom and drillstock surface intercommunication.

The drill handle is characterized in that a waist groove and a straight groove are formed in the drill handle along the circumference of the surface, the waist groove and the straight groove are distributed at intervals, the straight groove extends to the end face of the drill handle, the waist groove and the straight groove are both arranged to be two, the two waist grooves are opposite to each other along the radial direction of the drill handle, and the two straight grooves are opposite to each other along the radial direction of the drill handle.

Specifically, the chip grooves are semicircular grooves or trapezoidal grooves.

The utility model has the advantages that: compared with the prior art, the drill handle is cut off towards the drill body along the surface of the drill handle, so that the length of the drill body is shortened, the bottom of the chip groove is directly communicated with the surface of the drill handle, and during deep hole operation, under the centrifugal action of high-speed rotation of the drill bit, the chips are discharged out of the deep hole along the direction of the drill handle of the chip groove, so that the chips are prevented from being blocked in the chip groove, and the abrasion of the chips to the drill bit is reduced.

Drawings

Fig. 1 is a schematic view of a conventional electric hammer bit.

Fig. 2 is the structure schematic diagram of the electric hammer drill of the present invention.

The reference numbers illustrate: 1. a drill bit; 2. a drill body; 3. a drill shank; 4. a chip groove; 5. a cutting edge; 6. a straight groove; 7. a waist groove; 8. a chip inlet; 9. a chip removal port; 10. and (4) drilling a cutter.

Detailed Description

Please refer to fig. 2-the utility model discloses electric hammer drill bit structure sketch map, the utility model discloses a drill bit convenient to chip removal, including boring body 2, drillstock 3, brill sword 10, boring body and drillstock structure as an organic whole, and the external diameter of boring body 2 is greater than the external diameter of drillstock 3, the gomphosis of brill sword 10 is at the tip of boring body 2, the chip groove of helical structure is seted up along the surface circumference to boring body 2, drillstock 3 cuts towards boring body 2 direction along the drillstock surface, makes chip groove 4 tank bottom and drillstock 3 surface intercommunication.

In this embodiment, the chip groove 4 is a double-spiral structure, the double-spiral chip groove 4 is diametrically opposite, the chip inlet 8 is arranged at the end of the chip groove 4, which is in butt joint with the drill bit 1, and the chip outlet 9 is arranged at the end of the drill shank 3, on the basis of the prior art, the lead of the chip groove 4 is kept unchanged, the length of the drill body 2 is shortened, the connecting part of the drill body 2 and the drill shank 3 is located at the chip outlet 9, and the chip outlet 9 is located on the surface of the drill shank 3.

During drilling, a drill handle 3 of the electric hammer drill bit is arranged in an electric hammer mounting hole, an electric hammer is started to drive the drill bit 1 to rotate, a drill cutter 10 is aligned with a machining hole to drill a machined object from the surface to the inside, drilled chips enter a chip discharge groove 4 from a chip inlet 8, and are transferred upwards along a spiral structure of the chip discharge groove 4, and when the chips are transferred to the chip discharge groove 4 outside the hole, the chips are thrown out of the chip discharge groove 4 under the centrifugal action; compared with the prior art, because 4 chip removal one ends of electric hammer drill bit chip groove are located 3 surfaces of drillstock, during the deep hole operation, under the high-speed rotatory centrifugal action of drill bit 1, the piece is along chip groove 4 from 3 directions of drillstock deep holes of chip discharge to avoid the piece to block in chip groove 4, reduce the wearing and tearing of piece to drill bit 1.

Specifically, waist groove 7 and straight flute 6 have been seted up along the surperficial circumference to drillstock 3, waist groove 7 and straight flute 6 interval distribution, straight flute 6 extends to the terminal surface of drillstock 3, waist groove 7 and straight flute 6 all set up to two, and two waist grooves 7 are relative along drillstock 3 is radial, and two straight flutes 6 are relative along drillstock 3 is radial.

By adopting the scheme, the drill handle 3 of the drill bit 1 adopts a four-groove round handle structure commonly used in the field, and the electric hammer can stably clamp the drill bit 1 by matching the four-groove jacket of the electric hammer with the two waist grooves 7 and the two straight grooves 6, so that the drill bit 1 is driven to rotate; the surface of the drill shank 3 is provided with waist grooves 7 and straight grooves 6 which are distributed at intervals, wherein the straight grooves 6 are directly clamped when the drill shank 3 is arranged in the electric hammer mounting hole, the waist grooves 7 are clamped through a clamping sleeve after the drill shank 3 is arranged in the electric hammer mounting hole, the stable connection between the drill bit 1 and the electric hammer is realized through the simultaneous use of the waist grooves 7 and the straight grooves 6,

specifically, the chip grooves 4 are semicircular grooves or trapezoidal grooves.

By adopting the scheme, the chip removal groove 4 structure can adopt a semicircular groove or a trapezoidal groove in the prior art to realize chip removal.

The above embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by the technical solution of the present invention by those skilled in the art are all within the scope of the present invention as defined by the claims.

Claims (3)

1. The utility model provides a drill bit convenient to chip removal, includes the brill body, drillstock, brill sword, the brill body and drillstock structure as an organic whole, the external diameter of the brill body is greater than the external diameter of drillstock, the gomphosis of brill sword is at the tip of the brill body, the chip groove that helical structure, its characterized in that have been seted up along surface circumference to the brill body: the drill handle is cut off towards the direction of the drill body along the surface of the drill handle, so that the bottom of the chip groove is communicated with the surface of the drill handle.

2. A chip evacuation facilitating drill bit as claimed in claim 1, wherein: waist groove and straight flute have been seted up along surface circumference to the drillstock, waist groove and straight flute interval distribution, the straight flute extends to the terminal surface of drillstock, waist groove and straight flute all set up to two, and two waist grooves are relative along the drillstock is radial, and two straight flutes are relative along the drillstock is radial.

3. A chip evacuation facilitating drill bit as claimed in claim 1, wherein: the chip grooves are semicircular grooves or trapezoidal grooves.

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