CN110153471A - Electric hand drill with drill bit refrigerating function - Google Patents
Electric hand drill with drill bit refrigerating function Download PDFInfo
- Publication number
- CN110153471A CN110153471A CN201910512370.6A CN201910512370A CN110153471A CN 110153471 A CN110153471 A CN 110153471A CN 201910512370 A CN201910512370 A CN 201910512370A CN 110153471 A CN110153471 A CN 110153471A
- Authority
- CN
- China
- Prior art keywords
- outside
- pipe
- drill bit
- drill
- battery
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
- B23B45/003—Attachments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
- B23B45/02—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor driven by electric power
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
- B23Q11/1092—Arrangements for cooling or lubricating tools or work specially adapted for portable power-driven tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/006—Vibration damping means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling And Boring (AREA)
Abstract
The invention discloses a kind of electric hand drills with drill bit refrigerating function, including bottom cover, the lower end surface of the bottom cover is equipped with battery, battery limiting plate is installed above the battery, switch is installed above the battery limiting plate, the front end face of the switch is equipped with reversion button, shell is installed on the outside of the switch, the front end face of the shell is equipped with thermovent, connecting box is installed on the inside of the thermovent, one end of the connecting box is equipped with water tank, the other end of the connecting box is equipped with motor shaft, motor is installed on the outside of the motor shaft, cushion is installed on the outside of the motor.The present invention is cooled down by being provided with circulating water flow and blade on the outside of drill bit, guarantee that temperature of diamond bit is not too high, and blade also to a certain extent controls the temperature of water, adds cushion when reducing motor work to whole bring vibratory sensation, improves comforts of use.
Description
Technical field
The present invention relates to electric hand drill technical field, specially a kind of electric hand drill with drill bit refrigerating function.
Background technique
With the rapid development of social economy, electric hand drill is frequently used in daily life, and electric hand drill is to exchange
Power supply or dc-battery are the boring bar tool of power, are one kind of hand held electric tool, electric hand drill is Power Tools Industries pin
Maximum product is measured, is widely used in the industries such as building, finishing and furniture, the performance of electric hand drill is become better and better at present.But
Existing electric hand drill is bad for the cooling effect of drill bit, and water spray influences bit life big；Therefore, it is unsatisfactory for existing
Demand, to this, we have proposed a kind of electric hand drills with drill bit refrigerating function, furthermore, while there is part in the prior art
Cooling electric hand drill: CN203197313U, CN202506871U is carried out to drill bit using water cooling, it can only but there are water composite cooling pipes
It is enough attached to electric drill to show that effective three-dimensional heat exchange can not be carried out, and when drill bit position carries out water pipe laying, is easy to interfere
The traveling and limitation punching depth of drill bit.Furthermore existing water pipe carry out supply cooling water or replace cooling water when need by
Electric drill entirety band is gone on foot nourishment source, or by electric drill holding one make water may not flow into the inclination attitude inside electric drill, grasp
Make cumbersome.
Summary of the invention
The purpose of the present invention is to provide a kind of electric hand drills with drill bit refrigerating function, to solve in above-mentioned background technique
The electric hand drill of proposition is bad for the cooling effect of drill bit, and water spray influences the problems such as big to bit life.
To achieve the above object, the invention provides the following technical scheme: a kind of electric hand drill with drill bit refrigerating function, packet
Bottom cover is included, the lower end surface of the bottom cover is equipped with battery, and battery limiting plate, the battery limiting are equipped with above the battery
Switch is installed, the front end face of the switch is equipped with reversion button, and shell, institute are equipped on the outside of the switch above plate
The front end face for stating shell is equipped with thermovent, and connecting box, one end installation of the connecting box are equipped on the inside of the thermovent
Have water tank, the other end of the connecting box is equipped with motor shaft, motor is installed on the outside of the motor shaft, the motor it is outer
Side is equipped with cushion, and the side of the motor is equipped with radiator shutter, and the side of the radiator shutter is equipped with shift knob,
The side of the shift knob is equipped with drill chuck, and fixes sleeve, the fixes sleeve one are equipped on the outside of the drill chuck
Water pipe sleeve is installed, the fixes sleeve is connected with water pipe sleeve by spring, the outside of the water pipe sleeve on the outside of end
Master collet is installed, pipe with spiral pipe is installed on the inside of the water pipe sleeve, the side of the drill chuck is equipped with radiator shutter,
Drill bit is installed on the inside of the radiator shutter.
By adopting the above technical scheme, it is provided with circulating water flow on the outside of drill bit and blade cools down, guarantees drill bit temperature
Spend not too high, and blade also to a certain extent controls the temperature of water, when adding cushion reduces motor work
To whole bring vibratory sensation, comforts of use are improved.
Preferably, the shell includes two points of shells, and shell is divided to be connected by screw to fixation.
By adopting the above technical scheme, it divides housing 135 into two parts to be fixed by making a decision, convenient for whole dismounting.
Preferably, one end of the motor is provided with thermovent, is adhesively fixed with cushion on the outside of the motor.
By adopting the above technical scheme, the heat that generates radiates when thermovent can work to motor, and cushion can will be strong
Motor is to whole bring vibratory sensation.
Preferably, the lower end of the case inside is provided with card slot, and the inside of card slot, the battery is arranged in the battery
It is fixed by screws in the upper surface of bottom cover, the lower end surface of the bottom cover is provided with charging jacks.
By adopting the above technical scheme, battery is installed by the way that card slot is arranged, simultaneously by bottom cover and battery limiting plate
Battery is fixed, so that structure is more stable, can be worked without connecting power supply always.
Preferably, blade is provided on the inside of the connecting box, and blade is fixed on the outside of motor shaft one end, the company
It connects case and water tank is adhesively fixed.
By adopting the above technical scheme, the water on the inside of water tank is transported in external water pipe by blade rotation, completes circulation
Movement.
Preferably, one end of the pipe with spiral pipe is connected with the outside of connecting box by external water pipe, the pipe with spiral pipe
The other end be adhesively fixed on the inside of water pipe sleeve.
By adopting the above technical scheme, external water pipe plays the role of connecting transmitting, ensure that the complete of water circulation.
Preferably, the radiator shutter and drill chuck are adhesively fixed, and the radiator shutter and drill bit do not contact.
By adopting the above technical scheme, cool down when radiator shutter can be to bit operation, can also play within certain limits
Dust removing effects.
Compared with prior art, the beneficial effects of the present invention are:
1, the present invention is by the way that when drill bit deeply drills, the pressure that one end of water pipe sleeve is subject to processing body surface is pressed
Contracting, by spring contraction, water pipe sleeve increases the working depth of drill bit, is effectively guaranteed in the medial motion of master collet
The ability to work of drill bit, and the setting of spring also protects radiator shutter not touched, and is adhesively fixed on the outside of motor slow
Punching pad carries out damping, reduces whole vibratory sensation, improve usage comfort when motor is worked；
2, the present invention is provided with connecting box and fixes sleeve by one end in motor shaft, is provided with blade on the inside of connecting box,
Motor shaft can be rotated with movable vane piece, and the water on the inside of water tank passes through connection pipe with spiral pipe and company under the drive that blade rotates
The external water pipe for connecing case enters pipe with spiral pipe and is recycled, and when drill bit and drill chuck rotate, drives radiator shutter to be rotated, spiral shell
It revolves the water on the inside of water pipe and carries out shuttling movement, when temperature of diamond bit increases, radiator shutter and pipe with spiral pipe 16 cool down simultaneously.
3, the water pipe and air bag of spiral wound, the comprehensive design of the easy plastic material of water pipe to ensure that the effective of drill bit
Working depth, and ensure that the forward uniformity of drill bit, not only allow to the acceleration gas source as water flowing, is also used as
The auxiliary security structure at the quick and convenient replacement water source of water tank.
Detailed description of the invention
Fig. 1 is the whole structural schematic diagram of the present invention；
Fig. 2 is the whole the schematic diagram of the section structure of the present invention；
Fig. 3 is the partial profile structure on the inside of master collet of the present invention；
Fig. 4 is the partial profile structure of battery of the present invention.
In figure: 1, shell；2, it switchs；3, button is inverted；4, thermovent；5, water tank；6, shift knob；7, drill bit；8, water
Pipe sleeve cylinder；9, master collet；10, drill chuck；11, motor shaft；12, motor；13, connecting box；14, radiator shutter；15, fixing sleeve
Cylinder；16, pipe with spiral pipe；17, battery；18, bottom cover；19, battery limiting plate；20, cushion；21, spring.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Motor 12(model DC12V-18V mentioned in the present invention) can market or it is private order obtained by.
Embodiment 1: Fig. 1-4 is please referred to, a kind of embodiment provided by the invention: a kind of flashlight with drill bit refrigerating function
It bores, including bottom cover 18, the lower end surface of bottom cover 18 are equipped with battery 17, the top of battery 17 is equipped with battery limiting plate 19, battery
The top of limit plate 19 is equipped with switch 2, and the front end face of switch 2 is equipped with reversion button 3, and the outside of switch 2 is equipped with shell
1, the front end face of shell 1 is equipped with thermovent 4, and the inside of thermovent 4 is equipped with connecting box 13, and one end of connecting box 13 is equipped with
Water tank 5, the other end of connecting box 13 are equipped with motor shaft 11, and the outside of motor shaft 11 is equipped with motor 12, the outside of motor 12
Cushion 20 is installed, the side of motor 12 is equipped with radiator shutter 14, and the side of radiator shutter 14 is equipped with shift knob 6,
The side of shift knob 6 is equipped with drill chuck 10, and the outside of drill chuck 10 is equipped with fixes sleeve 15,15 one end of fixes sleeve
Outside is equipped with water pipe sleeve 8, fixes sleeve 15 and water pipe sleeve 8 and is connected by spring 21, and the outside of water pipe sleeve 8 is equipped with
Master collet 9, the inside of water pipe sleeve 8 are equipped with pipe with spiral pipe 16, and the side of drill chuck 10 is equipped with radiator shutter 14, and radiate leaf
Piece 14 cools down when can work drill bit 7, can also play dust removing effects, the inside installation of radiator shutter 14 within certain limits
There is drill bit 7, the outside of drill bit 7 be provided with circulating water flow and radiator shutter 14 cools down, guarantees that temperature of diamond bit is not too high,
And radiator shutter 14 also to a certain extent controls the temperature of water, add cushion 20 reduce motor 12 work when pair
Whole bring vibratory sensation, improves comforts of use.
Specifically, as illustrated in fig. 1 and 2, shell 1 includes two points of shells, and shell is divided to be connected by screw to fixation.
By using above-mentioned technical proposal, shell 1 is divided into two parts and is fixed by making a decision, is torn open convenient for whole
Dress.
Specifically, the outside of motor 12 is adhesively fixed with buffering as shown in Fig. 2, one end of motor 12 is provided with thermovent 4
Pad 20.
By using above-mentioned technical proposal, the heat that thermovent 4 generates when can work motor 12 radiates, cushion
20 can be by 12 pairs of forceful electric power machine whole bring vibratory sensations.
Specifically, as shown in Figures 2 and 4, the lower end of 1 inside of shell is provided with card slot, and the inside of card slot is arranged in battery 17,
Battery 17 is fixed by screws in the upper surface of bottom cover 18, and the lower end surface of bottom cover 18 is provided with charging jacks.
By using above-mentioned technical proposal, battery 17 is installed by the way that card slot is arranged, is limited by bottom cover 18 and battery
Position plate 19 is simultaneously fixed battery 17, so that structure is more stable, can work without connecting power supply always.
Specifically, as shown in Fig. 2, the inside of connecting box 13 is provided with blade, and blade is fixed on 11 one end of motor shaft
Outside, connecting box 13 and water tank 5 are adhesively fixed.
By using above-mentioned technical proposal, the water of 5 inside of water tank is transported in external water pipe by blade rotation, is completed
Circulation action.
Specifically, as shown in Figures 2 and 3, one end of pipe with spiral pipe 16 is connected with the outside of connecting box 13 by external water pipe,
The other end of pipe with spiral pipe 16 is adhesively fixed on the inside of water pipe sleeve 8.
By using above-mentioned technical proposal, external water pipe plays the role of connecting transmitting, ensure that the complete of water circulation.
Specifically, as shown in Figures 2 and 3, radiator shutter 14 and drill chuck 10 are adhesively fixed, and radiator shutter 14 and drill bit 7 are not
Contact.
By using above-mentioned technical proposal, radiator shutter 14 cools down when can work drill bit 7, can also be in certain limit
Inside play dust removing effects.
In use, check whether the function of each part is intact, shell 1 is divided to for two small point of shells, passes through multiple positioning screws
Be fixed, the lower end of the inside of shell 1 be provided with can the battery 17 that operates of power supply machine 12, in the top and bottom of battery 17 point
It is not provided with battery limiting plate 19 and bottom cover 18, battery 17 is fixed, the surface of bottom cover 18 is provided with charging jacks, makes
Rechargeable Reusability can be carried out by obtaining entirety, and without connecting power work always, one end of motor shaft 11 is provided with connecting box
13 and fixes sleeve 15, the inside of connecting box 13 be provided with blade, motor shaft 11 can be rotated with movable vane piece, the inside of water tank 5
Water under the drive that blade rotates, by connection pipe with spiral pipe 16 and connecting box 13 external water pipe enter pipe with spiral pipe 16 into
Row circulation integrally works when pressing lower switch 2, and drill bit 7 and drill chuck 10 start to rotate, and radiator shutter 14 is driven to carry out
The water of rotation, 16 inside of pipe with spiral pipe carries out shuttling movement, when 7 temperature of drill bit increases, radiator shutter 14 and pipe with spiral pipe 16
Simultaneously cool down, when preventing temperature of diamond bit excessively high, influence using and the service life, when drill bit deeply drills, the one of water pipe sleeve 8
End is subject to processing the pressure of body surface and is compressed, and is shunk by spring 21, water pipe sleeve 8 master collet 9 medial motion,
Effective working depth of drill bit is effectively guaranteed, is adhesively fixed with cushion 20 in the outside of motor 12, is carried out in motor 12
When work, damping is carried out, whole vibration is reduced, improves usage comfort, whole good cooling results.
Embodiment 2: spiral winding mode of the pipe with spiral pipe outside water pipe sleeve 8 is increased in this embodiment, furthermore
Also adding pipe with spiral pipe is easy plastic material, is respectively arranged with a gas on two connecting lines of pipe with spiral pipe and water tank 5
Capsule, the outlet and entrance which is are in natural shrinking state when not connecting, and the specific work process of the embodiment is as follows:
Spiral canoe makes water pipe sleeve 8 in the continuous damping medial motion in master collet 9, and brill is effectively guaranteed
Effective working depth of head, and ensure that the forward uniformity of drill bit, furthermore the spiral wound mode is similar to the pressure of spring
Contracting, during bit operation, heat the compressing so that air and water in it are partially squeezed plus the water pipe itself of generation
Out, it causes the pressure in air bag to increase, so that it is expanded, acts manually on the air bag at this time and squeezed, to accelerate
Water flow circulating in air bag, water tank and water pipe, accelerates the efficiency of cooling by water.Furthermore the outlet of the air bag and entrance exist
Allow to water tank under any tilt angle after electric drill stops operation when not connecting in natural shrinking state airbag design
Strange land replacement water source is removed from the interface of air bag will not because of the tension of the natural shrinking state and water of air bag itself itself
So that water flow is flowed out from air bag.Therefore the design of the air bag not only allows to the acceleration gas source as water flowing, can be with
Auxiliary security structure as the quick and convenient replacement water source of water tank.
Claims (4)
1. a kind of electric hand drill with drill bit refrigerating function, including bottom cover, it is characterised in that: the lower end surface of the bottom cover is equipped with
Battery is equipped with battery limiting plate above the battery, switch is equipped with above the battery limiting plate, the switch
Front end face is equipped with reversion button, and shell is equipped on the outside of the switch, and the front end face of the shell is equipped with thermovent, institute
It states and connecting box is installed on the inside of thermovent, one end of the connecting box is equipped with water tank, the other end installation of the connecting box
There is motor shaft, motor is installed on the outside of the motor shaft, cushion is installed on the outside of the motor, the one of the motor
Side is equipped with radiator shutter, and the side of the radiator shutter is equipped with shift knob, and the side of the shift knob is equipped with brill
Collet is equipped with fixes sleeve on the outside of the drill chuck, water pipe sleeve is equipped on the outside of described fixes sleeve one end, described
Fixes sleeve is connected with water pipe sleeve by spring, and master collet is equipped on the outside of the water pipe sleeve, the water pipe sleeve
Annular inboard spiral winding is equipped with pipe with spiral pipe, and the side of the drill chuck is equipped with radiator shutter, the radiator shutter
Inside is equipped with drill bit；Blade is provided on the inside of the connecting box, and blade is fixed on the outside of motor shaft one end, the company
It connects case and water tank is adhesively fixed, one end of the pipe with spiral pipe is connected with the outside of connecting box by external water pipe, the spiral
The other end of pipe is adhesively fixed on the inside of water pipe sleeve, and the radiator shutter and drill chuck are adhesively fixed；The radiator shutter
It is not contacted with drill bit, pipe with spiral pipe is easy plastic material, is respectively arranged on two connecting lines of pipe with spiral pipe and water tank
One air bag, the outlet and entrance which is are in natural shrinking state when not connecting.
2. a kind of electric hand drill with drill bit refrigerating function according to claim 1, it is characterised in that: the shell includes
Two points of shells, and shell is divided to be connected by screw to fixation.
3. a kind of electric hand drill with drill bit refrigerating function according to claim 1, it is characterised in that: the one of the motor
End is provided with thermovent, is adhesively fixed with cushion on the outside of the motor.
4. a kind of electric hand drill with drill bit refrigerating function according to claim 1, it is characterised in that: the case inside
Lower end be provided with the card slot, the inside of card slot is arranged in the battery, and the battery is fixed by screws in the upper of bottom cover
The lower end surface of end face, the pedestal is provided with charging jacks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910512370.6A CN110153471A (en) | 2019-06-13 | 2019-06-13 | Electric hand drill with drill bit refrigerating function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910512370.6A CN110153471A (en) | 2019-06-13 | 2019-06-13 | Electric hand drill with drill bit refrigerating function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110153471A true CN110153471A (en) | 2019-08-23 |
Family
ID=67628987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910512370.6A Withdrawn CN110153471A (en) | 2019-06-13 | 2019-06-13 | Electric hand drill with drill bit refrigerating function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110153471A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112936426A (en) * | 2021-02-05 | 2021-06-11 | 李亚芬 | Water-saving hidden drill bit cooling device |
| ES2849498A1 (en) * | 2020-02-18 | 2021-08-18 | Asensio Antoni Josep Soriano | FLUID DOSING DEVICE WITH COUPLING TO MOTORIZED TURNING TOOLS AND TOOL THAT INCLUDES IT (Machine-translation by Google Translate, not legally binding) |
| CN114571413A (en) * | 2022-03-11 | 2022-06-03 | 华丽电器制造有限公司 | Self-cooling electric hammer |
| CN115354971A (en) * | 2022-09-05 | 2022-11-18 | 鲁东大学 | Petroleum machinery installation drilling tool |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006088285A (en) * | 2004-09-27 | 2006-04-06 | Hitachi Koki Co Ltd | Drilling device |
| CN202095950U (en) * | 2011-05-27 | 2012-01-04 | 山东科技大学 | Heat insulation and heat dissipation water bottle |
| CN204673565U (en) * | 2015-05-06 | 2015-09-30 | 周瑞丽 | A kind of water circulation cooling device of pneumatic nail gun |
| CN205778515U (en) * | 2016-06-30 | 2016-12-07 | 高生平 | A kind of hydrogeologic prospecting drill bit chiller |
| CN106378475A (en) * | 2016-10-27 | 2017-02-08 | 林志城 | Electric hand drill with high applicability |
| CN109807368A (en) * | 2019-03-25 | 2019-05-28 | 咸宁职业技术学院 | A kind of efficient electromechanical equipment electrical drilling machine |
-
2019
- 2019-06-13 CN CN201910512370.6A patent/CN110153471A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006088285A (en) * | 2004-09-27 | 2006-04-06 | Hitachi Koki Co Ltd | Drilling device |
| CN202095950U (en) * | 2011-05-27 | 2012-01-04 | 山东科技大学 | Heat insulation and heat dissipation water bottle |
| CN204673565U (en) * | 2015-05-06 | 2015-09-30 | 周瑞丽 | A kind of water circulation cooling device of pneumatic nail gun |
| CN205778515U (en) * | 2016-06-30 | 2016-12-07 | 高生平 | A kind of hydrogeologic prospecting drill bit chiller |
| CN106378475A (en) * | 2016-10-27 | 2017-02-08 | 林志城 | Electric hand drill with high applicability |
| CN109807368A (en) * | 2019-03-25 | 2019-05-28 | 咸宁职业技术学院 | A kind of efficient electromechanical equipment electrical drilling machine |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2849498A1 (en) * | 2020-02-18 | 2021-08-18 | Asensio Antoni Josep Soriano | FLUID DOSING DEVICE WITH COUPLING TO MOTORIZED TURNING TOOLS AND TOOL THAT INCLUDES IT (Machine-translation by Google Translate, not legally binding) |
| CN112936426A (en) * | 2021-02-05 | 2021-06-11 | 李亚芬 | Water-saving hidden drill bit cooling device |
| CN114571413A (en) * | 2022-03-11 | 2022-06-03 | 华丽电器制造有限公司 | Self-cooling electric hammer |
| CN115354971A (en) * | 2022-09-05 | 2022-11-18 | 鲁东大学 | Petroleum machinery installation drilling tool |
| CN115354971B (en) * | 2022-09-05 | 2024-01-26 | 鲁东大学 | Petroleum machinery installs drilling tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190823 |
|
| WW01 | Invention patent application withdrawn after publication |