CN109676807A - Electric hammer drill - Google Patents
Electric hammer drill Download PDFInfo
- Publication number
- CN109676807A CN109676807A CN201910063848.1A CN201910063848A CN109676807A CN 109676807 A CN109676807 A CN 109676807A CN 201910063848 A CN201910063848 A CN 201910063848A CN 109676807 A CN109676807 A CN 109676807A
- Authority
- CN
- China
- Prior art keywords
- drill
- drill body
- drillstock
- chip space
- head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
- B28D1/146—Tools therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The present invention provides a kind of electric hammer drill, it is related to field of drill, including drill body, drillstock, the rear end of drill, drill body is connect with drillstock, and the front end of drill body is arranged in drill, the surface of drill body is equipped with chip space, drill body forms corresponding blade along chip space, and chip space gradually becomes shallower as from distance outlet 3 centimeters of end margin to the groove depth of outlet end margin, and the angle between blade and drill body central axis is 135 ± 10 °；The front end of drill body is equipped with pedestal, and drill is welded on the base, and the center of drill is equipped with arc groove, is fixedly connected with anti-impact made of useful hard alloy in arc groove and taps the head, and anti-impact taps the head and stretches out the front end face of drill；The junction of drillstock and drill body is equipped with shield；Drillstock circumferential surface is equipped with symmetrical and equally distributed limiting slot and spline.The present invention can prevent the fracture of chip space exit, break flour is avoided to splash by shock resistance head protection drill, by shield, anti-fatigue ability is strong, high mechanical strength, operation safety.
Description
Technical field
The present invention relates to field of drill, espespecially a kind of electric hammer drill.
Background technique
The electric hammer drill of the prior art generally welds carbide bit in drill body head, and in percussion drilling, hard is closed
The blade of golden cutter head directly with the direct contact impact of materials such as cement concrete and stone material, if the materials such as cement concrete and stone material
Contain harder impurity particle in material, under the impact of drill bit, it is easy to keep the blade generation notch of cutter head or even blade disconnected
It splits, influences bore operation, therefore the electric hammer drill impact resistance of the prior art is poor.
Referring to Fig. 1, drill bit in the prior art, since the chip removal groove depth in drill body is consistent, chip space outlet is deposited
In withdrawing step or sharp acute angles, so that the rod body split pole easy fracture at this, cutter life is shorter, and electric hammer drill is in warm
There are biggish internal stress in treatment process, and are easy sharply to locate to generate stress concentration in step, angle etc., reduce drill bit
Fatigue life, after a period of use be easy nearby break at first from helical flute root (helical flute outlet end)
Split phenomenon.
And in operation process, the break flour of discharge can along drill bit rotation and splash everywhere, hurt operation sometimes
The eyes of personnel.During prolonged cutting, the collet of electric hammer is easy to appear loosening, so that bit is influenced, or
Drill bit drillstock during rotation moves axially.
Summary of the invention
To solve the above problems, the present invention, which provides one kind, can prevent the fracture of chip space exit, by increasing shock resistance
Head protection drill, avoid break flour to splash by shield, anti-fatigue ability is strong, the electric hammer drill of high mechanical strength, operation safety.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of electric hammer drill, including drill body, drillstock, bore
The rear end of knife, the drill body is connect with drillstock, and the drill is arranged in the front end of drill body, the circumferential surface of the drill body be equipped with around
The chip space that drill body central axis extends spirally, chip space form input end in the front end of drill body, and chip space is in the rear end of drill body
Outlet end is formed, drill body forms corresponding blade along chip space, and the chip space is from distance outlet 3 centimeters of end margin to outlet
The groove depth of end margin gradually becomes shallower as, so that chip space is shiny surface at outlet end, the chip space is flat dovetail groove, and sword
Angle between portion and drill body central axis is 135 ± 10 °；The front end of the drill body is equipped with pedestal, and the drill is welded on base
On seat, the center of the drill is equipped with arc groove, is fixedly connected with anti-impact made of useful hard alloy in the arc groove
It taps the head, and the anti-impact taps the head and stretches out the front end face of drill；The junction of the drillstock and drill body is equipped with shield, described anti-
Shield is set in drillstock surface, and the opening of shield is towards drill body head；The drillstock circumferential surface is equipped with symmetrical and uniform
The limiting slot and spline of distribution are equipped with the anti-feather key of outwardly convex in the limiting slot and spline.
Specifically, the center of the arc groove is equipped with blind hole, and the anti-impact, which is tapped the head, is equipped with connecting column corresponding with blind hole,
Through connecting column close-fitting in blind hole, the anti-impact is tapped the head to be fixedly connected with the pedestal.
Specifically, the front end face that the anti-impact is tapped the head is equipped with clamping slot, the useful hard alloy system of welding in the clamping slot
At blade.
Specifically, the shape of the blade is connected setting, the shape and blade shapes of the clamping slot with the shape of drill
It is correspondingly arranged.
Specifically, the shield flare.
Specifically, the material of the shield is PMMA.
Specifically, the rear end face of the drillstock offers grid line, and grid line surface is sintered by high pressure high temperature
There is polycrystalline diamond layer.
Specifically, the circumferential surface of the drill body is coated with nickel coating.
The beneficial effects of the present invention are:
1) in the present invention, chip space is gradually become shallower as from 3 centimeters apart from outlet end to outlet end, in chip space outlet end
Stress concentration will not be generated near chip space outlet end without withdrawing step trace and sharp acute angles, in heat treatment process, simultaneously
The loaded area near chip space outlet end is increased, the anti-fatigue ability of drill body is improved, extends the service life of drill body
One times or more.Chip space is that the included angle of flat dovetail groove and blade and drill body central axis is 135 ± 10 °, to keep away
Exempt to generate stress concentration because angle is too small, improves the fatigue life of drill body, while reducing break flour by chip space mistake
The frictional resistance that Cheng Zhongyu chip space generates, improves chip removal efficiency.
2) it in the present invention, is tapped the head front end setting anti-impact made of hard alloy in drill body, and anti-impact is tapped the head and stretched
The front end face of drill out, when with materials such as boring of electric hammer, drill frequent impact cement concrete and stone materials, anti-impact is tapped the head and is first connect
The materials such as cement concrete and stone material are touched, this avoid drills directly to contact the materials such as cement concrete and stone material, effectively
Drill is protected not contained harder impurity particle collision cleft in the materials such as cement concrete and stone material or generate notch, therefore this
Electric hammer drill high mechanical strength, the impact resistance of invention are good.
3) in the present invention, by increasing shield, in bore operation, the break flour that can effectively avoid splashing injures operation people
The eyes of member, are conducive to operation safety.
Detailed description of the invention
Fig. 1 is the flute of drill structural schematic diagram of the prior art；
Fig. 2 is the overall structure diagram of the embodiment of the present invention；
Fig. 3 is the drill body diagrammatic cross-section of the embodiment of the present invention；
Fig. 4 is the drill partial structure diagram of the embodiment of the present invention.
Drawing reference numeral explanation: 1- drill body；2- drillstock；3- drill；4- chip space；5- blade；6- pedestal；7- anti-impact is tapped the head；
8- shield；11- withdrawing step；21- limiting slot；22- spline；The anti-feather key of 23-；24- polycrystalline diamond layer；31- arc is recessed
Slot；32- blind hole；41- input end；The outlet end 42-；71- clamping slot；72- blade；73- connecting column.
Specific embodiment
Please refer to Fig. 2-4, the present invention is about a kind of electric hammer drill, including drill body 1, drillstock 2, drill 3, the drill body 1
Rear end is connect with drillstock 2, and the front end of drill body 1 is arranged in the drill 3, and the circumferential surface of the drill body 1 is equipped with around 1 center of drill body
The chip space 4 that axis extends spirally, chip space 4 form input end 41, rear end shape of the chip space 4 in drill body 1 in the front end of drill body 1
At outlet end 42, drill body 1 forms corresponding blade 5 along chip space 4, and the chip space 4 is from apart from 42 edge of outlet end, 3 centimeters
Groove depth to 42 edge of outlet end gradually becomes shallower as, so that chip space 4 is shiny surface at outlet end 42, the chip space 4 is flat
Bottom dovetail groove, and the angle between 1 central axis of blade 5 and drill body is 135 ± 10 °；The front end of the drill body 1 is equipped with pedestal 6,
The drill 3 is welded on pedestal 6, and the center of the drill 3 is equipped with arc groove 31, is fixedly connected in the arc groove 31
Anti-impact made of useful hard alloy taps the head 7, and the anti-impact is tapped the head the front end face of 7 stretching drills 3；The drillstock 2 and brill
The junction of body 1 is equipped with shield 8, and the shield 8 is set in 2 surface of drillstock, and the opening of shield 8 is towards before drill body 1
End；2 circumferential surface of drillstock is equipped with symmetrical and equally distributed limiting slot 21 and spline 22, the limiting slot 21 and spline
The anti-feather key 23 of outwardly convex is equipped in slot 22.
In the present invention, the front end refers to that the rear end refers to towards the direction that will pierce 3 position of drill in processing object
Direction will be by the direction at drillstock 2 position of the clamping in electric hammer, as it is well known in the art drill body 1 generally includes the drill 3 of front end
With the drillstock 2 of rear end, drill 3 be for portalling to processing object drilling, drillstock 2 be for clamping in electric hammer.
In the present invention, chip space 4 is gradually become shallower as from 3 centimeters apart from outlet end 42 to outlet end 42, is gone out in chip space 4
Mouthful end 42 will not be generated near 4 outlet end 42 of chip space in heat treatment process and be answered without 11 trace of withdrawing step and sharp acute angles
Power is concentrated, while increasing the loaded area near 4 outlet end 42 of chip space, is improved the anti-fatigue ability of drill body 1, is made drill body
1 service life extends one times or more.Chip space 4 is the included angle of flat dovetail groove and blade 5 and 1 central axis of drill body
It is 135 ± 10 °, to avoid generating stress concentration because angle is too small, improves the fatigue life of drill body 1, reduce simultaneously
The frictional resistance that break flour generates during passing through chip space 4 with chip space 4, improves chip removal efficiency.
In the present invention, 7 are tapped the head front end setting anti-impact made of hard alloy in drill body 1, and anti-impact is tapped the head and 7 stretched
The front end face of drill 3 out, when with materials such as boring of electric hammer, 3 frequent impact cement concrete of drill and stone materials, anti-impact taps the head 7
The materials such as cement concrete and stone material are first contacted, this avoid drills 3 directly to contact the materials such as cement concrete and stone material, has
Drill 3 is protected to effect not contained harder impurity particle collision cleft in the materials such as cement concrete and stone material or generate notch,
Therefore electric hammer drill high mechanical strength of the invention, impact resistance are good.
In the present invention, by increasing shield 8, in bore operation, the break flour that can effectively avoid splashing injures operation people
The eyes of member, are conducive to operation safety.
In the present invention, drillstock 2 is equipped with symmetrical and equally distributed limiting slot 21 and spline 22, and limiting slot 21 and flower
The anti-feather key 23 of outwardly convex is equipped in keyway 22, so that the collet of drillstock 2 and electric hammer is able to carry out and firmly grips,
So that drillstock 2 and collet are not in relative rotation or movement in operation process, guarantee operation quality.
Specifically, the center of the arc groove 31 is equipped with blind hole 32, and the anti-impact taps the head 7 equipped with corresponding with blind hole 32
Connecting column 73, through 73 close-fitting of connecting column in blind hole 32, the anti-impact is tapped the head 7 to be fixedly connected with the pedestal 6.
Anti-impact tap the head 7 installation when, the tap the head connecting column 73 of 7 connecting pins of anti-impact is a tight fit in the blind hole 32 of arc groove 31
Inside can be completed anti-impact tap the head 7 installation.
Specifically, tap the head 7 front end face of the anti-impact is equipped with clamping slot 71, and the useful hard of welding closes in the clamping slot 71
Blade 72 made of gold.
The blade 72 increase anti-impact tap the head 7 cutting power, therefore electric hammer drill cutting speed of the invention is fast, bores
Hole is high-efficient.
Specifically, the shape with the shape of drill 3 of the blade 72 are connected setting, the shape and blade of the clamping slot 71
72 shapes are correspondingly arranged.
Using the above scheme, it ensure that the consistency of blade 72 Yu 3 chip removal direction of drill, reduce the abrasion of drill 3.
Specifically, 8 flare of shield.
Specifically, the material of the shield 8 is PMMA.
Shield 8 is made into using transparent PMMA material, intuitively observes bore operation feelings through shield 8 convenient for operating personnel
Condition.
Specifically, the rear end face of the drillstock 2 offers grid line, and grid line surface is sintered by high pressure high temperature
There is polycrystalline diamond layer 24.
Drillstock 2 is made of hard alloy, keeps polycrystalline diamond compound well with hard alloy by grid line,
The advantages of both comprehensive, the mechanical strength, wearability and resistance to percussion of drillstock 2 are improved, electric hammer can be born well
Hammering.
Specifically, the circumferential surface of the drill body 1 is coated with nickel coating.
By being coated with nickel coating in the circumferential surface of drill body 1, the hardness and wearability of drill body 1 are improved, extending it makes
Use the service life.
Embodiment of above be only preferred embodiments of the present invention will be described, not to the scope of the present invention into
Row limits, and without departing from the spirit of the design of the present invention, this field ordinary engineering and technical personnel is to technical side of the invention
The various changes and improvements that case is made, should fall within the scope of protection determined by the claims of the present invention.
Claims (8)
1. a kind of electric hammer drill, including drill body, drillstock, the rear end of drill, the drill body are connect with drillstock, the drill setting exists
The front end of drill body, the circumferential surface of the drill body are equipped with the chip space extended spirally around drill body central axis, and chip space is in drill body
Front end form input end, chip space forms outlet end in the rear end of drill body, and drill body forms corresponding blade along chip space, special
Sign is: the chip space gradually becomes shallower as from distance outlet 3 centimeters of end margin to the groove depth of outlet end margin, so that chip space
It is shiny surface at outlet end, the chip space is flat dovetail groove, and the angle between blade and drill body central axis is 135
±10°；The front end of the drill body is equipped with pedestal, and on the base, the center of the drill is equipped with arc groove for the drill welding,
It is fixedly connected with anti-impact made of useful hard alloy in the arc groove to tap the head, and the anti-impact is tapped the head before stretching out drill
End face；The junction of the drillstock and drill body is equipped with shield, and the shielding cover is located at drillstock surface, and the opening of shield
Towards drill body head；The drillstock circumferential surface is equipped with symmetrical and equally distributed limiting slot and spline, the limiting slot and
The anti-feather key of outwardly convex is equipped in spline.
2. electric hammer drill according to claim 1, it is characterised in that: the center of the arc groove is equipped with blind hole, described
Anti-impact, which is tapped the head, is equipped with connecting column corresponding with blind hole, and through connecting column close-fitting in blind hole, the anti-impact is tapped the head and the pedestal
It is fixedly connected.
3. electric hammer drill according to claim 1, it is characterised in that: the front end face that the anti-impact is tapped the head is equipped with clamping slot,
Blade made of the useful hard alloy of welding in the clamping slot.
4. electric hammer drill according to claim 3, it is characterised in that: the shape of the blade is connected with the shape of drill to be set
It sets, shape and the blade shapes of the clamping slot are correspondingly arranged.
5. electric hammer drill according to claim 1, it is characterised in that: the shield flare.
6. electric hammer drill according to claim 1, it is characterised in that: the material of the shield is PMMA.
7. electric hammer drill according to claim 1, it is characterised in that: the rear end face of the drillstock offers grid line, institute
Stating grid line surface has polycrystalline diamond layer by high pressure high temperature sintering.
8. electric hammer drill according to claim 1, it is characterised in that: the circumferential surface of the drill body is coated with nickel coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910063848.1A CN109676807A (en) | 2019-01-23 | 2019-01-23 | Electric hammer drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910063848.1A CN109676807A (en) | 2019-01-23 | 2019-01-23 | Electric hammer drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109676807A true CN109676807A (en) | 2019-04-26 |
Family
ID=66194414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910063848.1A Pending CN109676807A (en) | 2019-01-23 | 2019-01-23 | Electric hammer drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109676807A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110052687A (en) * | 2019-04-30 | 2019-07-26 | 襄阳润欣圆锻造有限公司 | A kind of split type forming punching head welding procedure |
-
2019
- 2019-01-23 CN CN201910063848.1A patent/CN109676807A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110052687A (en) * | 2019-04-30 | 2019-07-26 | 襄阳润欣圆锻造有限公司 | A kind of split type forming punching head welding procedure |
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