Electric hammer drill structure with tool bit shaped like Chinese character'chuan '

Abstract

The electric hammer drill structure comprises a drill handle and a drill rod integrally formed with the drill handle, double chip grooves are formed in the drill rod, V-shaped chip guide grooves are formed in the symmetrical side walls of the end, away from the drill handle, of the drill rod, and the two V-shaped chip guide grooves are communicated with the double chip grooves. Three tool bit grooves shaped like a Chinese character'chuan 'are formed in the end face, far away from the drill handle, of the drill rod; tool bits are welded and fixed in the three tool bit grooves, and the ends of the tool bits extend out of the side face of the drill rod. The drill bit is reasonable in structural arrangement, impact force of the drill bits can be balanced by arranging the three drill bits, and the drill bit is matched with the V-shaped chip guide grooves, so that chip removal speed is increased, impact force and durability of the whole structure are improved, slipping of a drill hole in the initial stage is prevented, and stability and efficiency of drill hole positioning are improved. And meanwhile, by matching with the double chip grooves, the chip removal smoothness and the heat dissipation performance can be improved, and the drilling reliability can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electric hammer drill technical field, concretely relates to a kind of electric hammer drill structure of chuan character-shaped tool bit. BACKGROUND

[0002] Electric hammer drill is a kind of common hand-held electric tool, wherein it is mainly rotated cutting, and impact mechanism driving impact drill bit is combined with impact force, the electric hammer drill bit of prior art is including drill rod, drill handle and tool bit, and there is spiral chip flute on drill rod, for example, Chinese patent application No. 202111456550.0, patent name is a kind of electric hammer drill bit and electric hammer drill, wherein electric hammer drill bit includes drill rod, drill handle, tool bit and spiral chip flute, also includes the ventilation passage being opened in drill rod central axis, the air inlet passage being communicated with ventilation passage one end and the air outlet passage being communicated with ventilation passage other end, air inlet passage is along the radial direction of drill rod It is set, and air inlet passage is located at the rear end of drill rod, and air outlet passage is located on tool bit, and air outlet passage extends to the top surface of tool bit.

[0003] Although it can meet the general use demand, but due to the limitation of tool bit, it will not only affect the impact force of tool bit, but also affect the stability of drilling, and also affect the service life of drill bit. INVENTION CONTENTS

[0004] The utility model aims at providing a kind of electric hammer drill structure of chuan character-shaped tool bit with reasonable structure and being conducive to improving use stability.

[0005] The technical scheme for realizing the utility model is a kind of electric hammer drill structure of chuan character-shaped tool bit, including drill handle and the drill rod being integrally formed with drill handle, double chip flutes are provided on drill rod, V-shaped chip guide groove is provided on the end of the distal end of drill rod symmetrically, and two V-shaped chip guide grooves are communicated with double chip flutes;

[0006] Three tool bit grooves in chuan character shape are provided on the end face of the distal end of drill rod;

[0007] Tool bit is welded and fixed in three tool bit grooves, and the end of tool bit protrudes from the side of drill rod.

[0008] Further preferably, the tool bit grooves at both ends are parallel, and the tool bit groove in the middle is inclinedly arranged.

[0009] One end of the tool bit at both ends extends into V-shaped chip guide groove.

[0010] Further preferably, the tool tip of tool bit is inclinedly arranged.

[0011] Further preferably, the height of tool bit in the middle is greater than the height of tool bit at both ends.

[0012] This utility model has positive effects: its structure is reasonably designed. By setting three cutting heads, it can balance the impact force of the cutting heads. The V-shaped chip guide groove also helps to improve the chip removal speed, improve the overall structural impact resistance and durability, and also helps to prevent slippage in the early stage of drilling, improve the stability and efficiency of drilling positioning. At the same time, the double chip removal groove helps to improve the smoothness of chip removal and heat dissipation performance, which helps to improve the reliability of drilling. Attached Figure Description

[0013] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 for Figure 1 Schematic diagram of the cross-section of the structure (AA).

[0016] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of BB.

[0017] Figure reference numerals: 1. Drill shank; 2. Drill rod; 3. Double chip flute; 4. V-shaped chip guide groove; 5. Cutter head groove; 6. Cutter head. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example

[0020] See Figures 1 to 3 As shown, a hammer drill structure with a 360-shaped cutter head includes a drill shank 1 and a drill rod 2 integrally formed with the drill shank. The drill rod is provided with a double chip removal groove 3, and V-shaped chip guide grooves 4 are provided on the symmetrical sidewalls of the end of the drill rod away from the drill shank. The two V-shaped chip guide grooves are connected to the double chip removal grooves. In this embodiment, the use of double chip removal grooves in combination with V-shaped chip guide grooves can ensure smooth chip removal and effective heat dissipation. Moreover, its chip holding space is large, which is conducive to improving the service life of the overall structure.

[0021] In practical application process, the end face of the drill rod away from the drill handle is provided with three cutter head grooves 5 in the shape of a river, and each cutter head groove is welded with a cutter head 6, and the end of the cutter head extends out of the side of the drill rod. Meanwhile, in the embodiment, the cutter head grooves at both ends are parallel, and the cutter head groove in the middle is inclined. One end of the cutter head at both ends extends into the V-shaped chip removal groove. Through the above structure, the strength of the overall structure is improved, the impact force of the three cutter heads is balanced, the chip removal speed is improved, the whole structure is durable, and the cutting edge of the cutter head is inclined. It can prevent slipping during drilling, make the drilling positioning more stable and efficient, and improve the service life.

[0022] In practical application process, the height of the cutter head in the middle is greater than the height of the cutter heads at both ends. It can prevent slipping during drilling and improve the efficiency of drilling.

[0023] The utility model has the positive effect: the structure of the utility model is reasonable, three cutter heads are arranged, the impact force of the cutter heads is balanced, the V-shaped chip removal groove is matched, the chip removal speed is improved, the impact force and durability of the overall structure are improved, the slipping during drilling is prevented, the stability and efficiency of the drilling positioning are improved, the double chip removal grooves are matched, the smoothness of chip removal and heat dissipation performance are improved, and the reliability of drilling is improved.

[0024] The standard parts used in the embodiment can be directly purchased from the market, and the non-standard structural parts according to the description can also be directly processed according to the existing technical knowledge without doubt, and the connection mode of each part adopts the mature conventional means in the existing technology, and the machinery, parts and equipment adopt the conventional type in the existing technology, so the specific description is not made here.

[0025] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and not the limitation of the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or changes can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the embodiments. The changes or changes extended from the essential spirit of the utility model are still within the protection scope of the utility model.

Claims

1. A hammer drill structure of a W-shaped bit head, comprising a drill shank and a drill rod integrally formed with the drill shank, a double chip flute being provided on the drill rod, characterized in that: The end of the drill rod away from the drill handle is provided with V-shaped chip guide grooves on the symmetrical side walls, and the two V-shaped chip guide grooves are communicated with the double-row chip guide grooves. The end face of the drill rod away from the drill handle is provided with three V-shaped chip guide grooves. The drill rod is provided with three drill head recesses.

2. The electric hammer drill structure of the V-shaped tool head according to claim 1, characterized in that: The drill head recesses at the two ends are parallel, and the drill head recess in the middle is inclined. One end of the drill head at the two ends extends into the V-shaped chip guide groove.

3. The electric hammer drill structure of the V-shaped tool head according to claim 2, characterized in that: The drill head tip is inclined.

4. The electric hammer drill structure of the V-shaped tool head according to claim 1, characterized in that: The height of the drill head in the middle is greater than that of the drill heads at the two ends.

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