CN111088952A - Electric impact rock drill - Google Patents
Electric impact rock drill Download PDFInfo
- Publication number
- CN111088952A CN111088952A CN202010160923.9A CN202010160923A CN111088952A CN 111088952 A CN111088952 A CN 111088952A CN 202010160923 A CN202010160923 A CN 202010160923A CN 111088952 A CN111088952 A CN 111088952A
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- China
- Prior art keywords
- wall
- outer box
- chamber
- inner box
- rock drill
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- 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.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C27/00—Machines which completely free the mineral from the seam
- E21C27/20—Mineral freed by means not involving slitting
- E21C27/28—Mineral freed by means not involving slitting by percussive drills with breaking-down means, e.g. wedge-shaped tools
Abstract
The invention discloses an electric impact rock drill, which comprises an outer box, wherein short shafts with symmetrical front and back positions are fixedly arranged on the front wall and the back wall of the outer box, the short shafts are rotatably connected with a fixing device used for steering and fixing the outer box, an outer box cavity is arranged in the outer box, an inner box which is connected with the upper wall and the lower wall of the outer box cavity in a sliding manner and extends out of the outer box penetrates through the left wall of the outer box cavity, the angle can be freely adjusted, the electric impact rock drill is convenient to use, and the electric impact rock drill does not need to be held by hand, so that the electric impact rock drill is safer; compared with other rock drills without hands, the rock drill has the advantages that the weight is smaller, and the rock drill is convenient to carry, manage and repair; when the variable frequency motor is used for a stone with high hardness, the rotating speed of the motor can be adjusted, and the rock drilling efficiency is improved; when in use, the noise is low, no exhaust gas is discharged, the cleaning and pollution-free effects are realized, and the working environment is relatively good.
Description
Technical Field
The invention relates to the technical field of building cement, clay or stone, in particular to an electric impact rock drill.
Background
Rock drills are tools used to directly mine rock material. It drills blastholes in rock formations to put explosives into the blastholes to blast the rock, to complete the quarrying of stone or other stone works, and in addition, the rock drill may be modified as a breaker for breaking hard layers such as concrete,
the conventional rock drills mainly comprise four types, namely a pneumatic rock drill, an internal combustion rock drill, an electric rock drill, a hydraulic rock drill and the like, and basically can effectively finish rock drilling work, but some defects still exist, such as large noise and low energy utilization rate generated when the pneumatic rock drill is used; the internal combustion rock drill uses gasoline as fuel, and exhaust gas discharged from the internal combustion rock drill pollutes air; the hydraulic rock drill is heavy, generally used together with a hydraulic drill carriage, and has high technical requirements and maintenance cost; when the electric rock drill is used for rocks with high hardness, the efficiency is low because the torque cannot be changed.
Disclosure of Invention
The object of the present invention is to provide an electric percussive rock drill which overcomes the above-mentioned drawbacks of the prior art.
The electric impact rock drill comprises an outer box, wherein short shafts with symmetrical front and back positions are fixedly arranged on the front wall and the back wall of the outer box, a fixing device used for enabling the outer box to turn and be fixed is rotatably connected onto the short shafts, an outer box cavity is arranged inside the outer box, an inner box which is connected with the upper wall and the lower wall of the outer box cavity in a sliding mode and extends out of the outer box penetrates through the left wall of the outer box cavity, a feeding mechanism which is symmetrical front and back positions and used for slowly pushing the inner box to the left is arranged on the front wall and the back wall of the outer box cavity, an inner box cavity is arranged inside the inner box, a square tube which is communicated with the left and the right is fixedly arranged on the right side of the bottom wall of the inner box cavity, a tube cavity is arranged inside the square tube, a power spring is fixedly arranged on the right wall of the tube cavity, a push plate which is connected with the tube cavity in a sliding mode is fixedly arranged at the left end of the power spring, and a drill bit of which penetrates through the left wall of the, the drill bit is located be equipped with the rack on the upper surface of inner box intracavity, rack toothing is connected with incomplete gear, incomplete gear key connect have the front end with inner box chamber rotates the pivot of connecting, the rear end of pivot be connected with set firmly in the first motor that can the frequency conversion on the inner box chamber back wall, the top of square tube sets firmly the chip removal mechanism that is used for water pressure to strike and discharges the inside stone bits of drilling.
On the basis of the technical scheme, the chip removal mechanism comprises a bottom plate fixedly arranged on the upper surface of the square cylinder, a side plate is fixedly connected with the left end of the bottom plate, the side plate and the front, rear, right and upper walls of the inner box cavity form a hydraulic cavity, a water outlet penetrating through the side plate is arranged on the left wall of the hydraulic cavity, the right side of the water outlet is connected with a hydraulic pump fixedly arranged on the upper surface of the bottom plate, the left side of the water outlet is connected with a water pipe with enough length, the left end of the water pipe is connected with a hydraulic pipeline positioned in the drill bit, the left end of the hydraulic pipeline is provided with a V-shaped water outlet with symmetrical up and down shape and a right outlet for avoiding being blocked in impact, a first water cover used for adding water is arranged in the top wall of the hydraulic cavity, and a second water cover used for adding water and communicated with the first water cover is arranged right above the first water cover.
On the basis of the technical scheme, the feeding mechanism comprises a second motor which is symmetrical to the front and back of the right wall of the outer box cavity in a butting mode, the left end of the second motor is connected with the left end of a threaded rod which is connected with the left wall of the outer box cavity in a rotating mode, the right side of the threaded rod is connected with two nuts in a threaded mode, the nuts are close to one side of a connecting rod fixedly connected with the inner box, and the connecting rod is fixedly connected with the front wall and the back wall of the inner box.
On the basis of the technical scheme, the fixing device comprises a fixing ring which is connected with the short shaft in a rotating mode and is symmetrical in the front position and the rear position, three spring cavities of an annular array are arranged inside the fixing ring, the spring cavities are far away from one end of the short shaft, an electromagnet is arranged close to one end of the short shaft, an extrusion spring is arranged close to one end of the short shaft, the one end of the short shaft is fixedly connected with and slides in a permanent magnet of the spring cavities, and the permanent magnet is close to one end of the short shaft, the one end of the short shaft is fixedly connected with and slides in a friction.
On the basis of the technical scheme, two bracing pieces and two fixing rings are fixedly connected with two supporting rods which are symmetrical in left and right positions and are fixed between the bottoms of the supporting rods, and detachable balancing weights used for increasing stability are fixedly mounted above the fixing rods.
The invention has the beneficial effects that: the angle can be freely adjusted, the use is convenient, the hand is not needed, and the safety is higher; compared with other rock drills without hands, the rock drill has the advantages that the weight is smaller, and the rock drill is convenient to carry, manage and repair; when the variable frequency motor is used for stones with high hardness, the rotating speed of the motor can be adjusted, the rock drilling efficiency is improved, and the energy utilization rate is high; when in use, the noise is low, no exhaust gas is discharged, the cleaning and pollution-free effects are realized, and the working environment is relatively good.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic view of the overall structure of an electric impact rock drill according to the present invention;
FIG. 2 is a schematic view of the present invention taken along the line A-A of FIG. 1;
FIG. 3 is a schematic view of the present invention taken along the line B-B of FIG. 1;
FIG. 4 is a schematic view of the structure of FIG. 2 taken along the direction C-C;
FIG. 5 is a schematic view of the structure of FIG. 4 taken in the direction D-D;
fig. 6 is an enlarged view of the invention at E in fig. 4.
Detailed Description
The invention will now be described in detail with reference to fig. 1-6, for convenience of description, the following orientations will now be defined: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
Referring to fig. 1-6, an electric impact rock drill according to an embodiment of the present invention includes an outer box 20, short shafts 51 with symmetrical front and rear positions are fixedly disposed on front and rear walls of the outer box 20, a fixing device 801 is rotatably connected to the short shafts 51 for rotating and fixing the outer box 20, an outer box cavity 44 is disposed inside the outer box 20, an inner box 40 slidably connected to upper and lower walls of the outer box cavity 44 and extending out of the outer box 20 penetrates through a left wall of the outer box cavity 44, a feeding mechanism 802 symmetrically disposed on front and rear walls of the outer box cavity 44 and used for slowly pushing the inner box 40 to the left is disposed on the front and rear walls of the outer box cavity 44, an inner box cavity 21 is disposed inside the inner box 40, a square tube 29 penetrating left and right is fixedly disposed on a right side of a bottom wall of the inner box cavity 21, a tube cavity 30 is disposed inside the square tube 29, a power spring 31 is fixedly disposed on a right wall of the tube cavity 30, a push plate 57 slidably connected to the tube cavity 30 is fixedly disposed at a left end of the power spring 31, the left surface of push pedal 57 sets firmly the left end and runs through the left wall of inner box cavity 21 and stretches out inner box 40's drill bit 38, drill bit 38 is located be equipped with rack 33 on the upper surface in inner box cavity 21, rack 33 meshing is connected with incomplete gear 35, incomplete gear 35 key joint have the front end with inner box cavity 21 rotates the pivot 34 of connecting, the rear end of pivot 34 be connected with set firmly in first motor 50 that can the frequency conversion on the inner box cavity 21 back wall, the top of square tube 29 sets firmly chip removal mechanism 803 that is used for water pressure to strike and discharges the inside stone bits of drilling, and when starting first motor 50, the rotation of first motor 50 is passed through pivot 34 drives incomplete gear 35 rotates, incomplete gear 35 is connected through the meshing rack 33 will drill bit 38 promotes right, drill bit 38 moves right and promotes push pedal 57, The power spring 31 is compressed and stores energy, when the incomplete gear 35 rotates for a certain angle until the incomplete gear 35 is disengaged from the rack 33, the drill bit 38 is rapidly pushed leftwards through the push plate 57 under the action of the elastic force of the power spring 31 and impacts rocks to complete one round of impact drilling, when the incomplete gear 35 rotates for a circle, the incomplete gear is meshed with the rack 33 again and starts next round of energy storage and impact, the drill bit 38 can impact the rocks ceaselessly through the ceaseless rotation of the first motor 50, and the effect of drilling by the rock drilling machine is achieved.
In addition, in an embodiment, the chip removal mechanism 803 includes a bottom plate 25 fixedly arranged on the upper surface of the square barrel 29, a side plate 22 is fixedly connected to the left end of the bottom plate 25, the side plate 22 and the four walls of the front, rear, upper right and upper right of the inner box cavity 21 enclose a hydraulic cavity 23, a water outlet 28 penetrating through the side plate 22 is arranged on the left wall of the hydraulic cavity 23, a hydraulic pump 27 fixedly arranged on the upper surface of the bottom plate 25 is connected to the right side of the water outlet 28, a water pipe 32 with a sufficient length is connected to the left side of the water outlet 28, the left end of the water pipe 32 is connected to a hydraulic pipeline 37 positioned inside the drill bit 38, a V-shaped water outlet 39 with a symmetrical upper and lower shape and used for avoiding being blocked when impacting is arranged at the left end of the hydraulic pipeline 37, a first water cap 26 for adding water is arranged in the hydraulic cavity 23, a second water cap 24 for adding water and communicated with the first water cap 26 is arranged right above the first water, when needs are added water, the right surface of inner box 40 need with the right wall butt in outer box chamber 44, this moment first water lid 26 with just right during the second water lid 24, then open second water lid 24 with first water lid 26 can go add water in the hydraulic pressure chamber 23, when the rivers chip removal of needs, open hydraulic pump 27, rivers pass through hydraulic pump 27 delivery port 28 the water pipe 32 hydraulic pipeline 37 is followed the V-arrangement delivery port 39 is spout, is washed out the impulsive force that passes through rivers with the stone bits from drilling, realizes the chip removal effect.
In addition, in one embodiment, the feeding mechanism 802 includes a second motor 48 which is symmetrical in front and rear positions and is abutted against the right wall of the outer box chamber 44, the left end of the second motor 48 is connected with a threaded rod 45 whose left end is rotatably connected with the left wall of the outer box chamber 44, the right side of the threaded rod 45 is in threaded connection with two nuts 47, one side of the nut 47 close to the inner box 40 is fixedly connected with a connecting rod 49, the connecting rod 49 is fixedly connected with the front and rear walls of the inner box 40, when feeding is required, the second motor 48 is started, the threaded rod 45 is driven to rotate by the rotation of the second motor 48, the nut 47 is limited in axial rotation because the nut 47 is fixedly connected with the inner box 40 through the connecting rod 49, the rotation of the threaded rod 45 is converted into axial movement of the nut 47, and the connecting rod 49 drives the inner box 40 to move leftwards, The feeding effect of the drill 38 is achieved.
In addition, in one embodiment, the fixing device 801 includes a fixing ring 46 rotationally connected to the stub shaft 51 and symmetrically located in front and rear directions, the fixing ring 46 is provided therein with three spring cavities 53 in an annular array, an electromagnet 52 is fixedly arranged at an end of the spring cavity 53 away from the stub shaft 51, an extrusion spring 54 is fixedly connected to an end of the electromagnet 52 close to the stub shaft 51, a permanent magnet 55 slidably connected to the spring cavity 53 is fixedly connected to an end of the extrusion spring 54 close to the stub shaft 51, a friction pad 56 slidably connected to the spring cavity 53 is fixedly connected to an end of the permanent magnet 55 close to the stub shaft 51, the extrusion spring 54 is pressed and extrudes the permanent magnet 55 and the friction pad 56 in a normal state, at this time, the friction force between the friction pad 56 and the stub shaft 51 is not large, the outer box 20 can be manually rotated to adjust the direction, when the direction is adjusted, the electromagnet 52 is electrified, a repulsive force is generated between the electromagnet 52 and the permanent magnet 55, and the permanent magnet 55 and the friction pad 56 are further pressed, so that the outer box 20 cannot rotate due to large friction force, and the fixing effect is realized.
In addition, in one embodiment, two support rods 41 are fixedly connected to the lower portion of the fixing ring 46, the two support rods 41 are symmetrical in left-right position, a fixing rod 43 is fixedly connected between the bottoms of the two support rods 41, and a detachable balancing weight 42 for increasing stability is fixedly mounted on the upper portion of the fixing rod 43.
In the initial state, the pressing spring 54 is pressed, the power spring 31 is not stressed, the incomplete gear 35 is not meshed with the rack, the nut 47 is positioned at the rightmost end, the right surface of the inner box 40 is abutted against the right wall of the outer box cavity 44, and the outer box 20 is in a horizontal state.
When water needs to be added, because the right surface of the inner box 40 is abutted against the right wall of the outer box cavity 44, the first water cover 26 is opposite to the second water cover 24, then the second water cover 24 and the first water cover 26 are opened to add water into the hydraulic cavity 23, the first water cover 26 and the second water cover 24 are closed after the water is added,
when rock drilling is needed, direction adjustment needs to be performed on the drill bit 38, the extrusion spring 54 is pressed and extrudes the permanent magnet 55 and the friction pad 56 under a normal state, the friction force between the friction pad 56 and the short shaft 51 is not large, the drill bit 38 can adjust the direction through manual rotation, when the direction is adjusted, the electromagnet 52 is electrified, repulsion force is generated between the electromagnet 52 and the permanent magnet 55, the permanent magnet 55 and the friction pad 56 are extruded in one step, the friction force is large, the drill bit 38 cannot rotate at the moment, and the fixing effect is achieved,
then the first motor 50 is started, the rotation of the first motor 50 drives the incomplete gear 35 to rotate through the rotating shaft 34, the incomplete gear 35 pushes the drill bit 38 rightwards through the rack 33 which is connected in a meshed mode, the drill bit 38 rightwards moves and pushes the push plate 57 to compress and store energy of the power spring 31, when the incomplete gear 35 rotates for a certain angle until the incomplete gear is separated from the rack 33 in the meshed mode, the drill bit 38 is rapidly pushed leftwards through the push plate 57 under the elastic force action of the power spring 31 and impacts the rock to complete one round of impact drilling, the incomplete gear 35 rotates for one circle and then is connected with the rack 33 in a meshed mode again to start energy storage and impact of the next round, the drill bit 38 can impact the rock continuously through continuous rotation of the first motor 50, and the rock drilling effect of the rock drilling machine is,
then the second motor 48 is started, the rotation of the second motor 48 drives the threaded rod 45 to rotate, the nut 47 is limited to axially rotate because the nut 47 is fixedly connected with the inner box 40 through the connecting rod 49, the rotating action of the threaded rod 45 is converted into the axial movement of the nut 47, and the connecting rod 49 drives the inner box 40 to move leftwards, so that the feeding effect of the drill 38 is realized,
when the drill bit 38 starts to drill into the rock, water flow is needed for chip removal, at the moment, the hydraulic pump 27 is turned on, the water flow passes through the hydraulic pump 27, the water outlet 28, the water pipe 32 and the hydraulic pipeline 37 and is sprayed out from the V-shaped water outlet 39, and the stone chips are washed out of the drilled hole through the impact force of the water flow, so that the chip removal effect is realized.
When the rock drilling is finished, the first motor 50 is closed when the incomplete gear 35 is disconnected from the rack 33, the second motor 48 is reversed, the drill bit 38 is pulled out until the nut 47 is positioned at the rightmost end, the right surface of the inner box 40 is abutted against the right wall of the outer box cavity 44, the second motor 48 is closed, then the hydraulic pump 27 is closed, the electromagnet 52 is powered off, and the outer box 20 is adjusted to be horizontal and then can return to the initial state.
The invention has the beneficial effects that: the angle can be freely adjusted, the use is convenient, the hand is not needed, and the safety is higher; compared with other rock drills without hands, the rock drill has the advantages that the weight is smaller, and the rock drill is convenient to carry, manage and repair; when the variable frequency motor is used for stones with high hardness, the rotating speed of the motor can be adjusted, the rock drilling efficiency is improved, and the energy utilization rate is high; when in use, the noise is low, no exhaust gas is discharged, the cleaning and pollution-free effects are realized, and the working environment is relatively good.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. An electric impact rock drill, includes outer container, its characterized in that:
the front wall and the rear wall of the outer box are fixedly provided with short shafts with symmetrical front and rear positions, the short shafts are rotatably connected with a fixing device for enabling the outer box to turn and fix, an outer box cavity is arranged in the outer box, the left wall of the outer box cavity is penetrated with an inner box which is connected with the upper wall and the lower wall of the outer box cavity in a sliding way and extends out of the outer box, the front wall and the rear wall of the outer box cavity are provided with feeding mechanisms which are symmetrical front and rear positions and are used for slowly pushing the inner box to the left,
the inside of inner box is equipped with the inner box chamber, the right side of inner box chamber diapire has set firmly about the square tube that link up, the inside section of thick bamboo chamber that is equipped with of square tube, power spring has set firmly on the right wall in section of thick bamboo chamber, power spring's left end be equipped with sliding connection in the push pedal in section of thick bamboo chamber admittedly, set firmly the left end on the left surface of push pedal and run through the left wall in inner box chamber and stretch out the drill bit of inner box, the drill bit is located be equipped with the rack on the upper surface in the inner box chamber, rack toothing is connected with incomplete gear, incomplete gear key be connected with the front end with the pivot of inner box chamber rotation connection, the rear end of pivot be connected with set firmly in the first motor that can the frequency conversion on the inner box chamber back wall, the top of square tube sets firmly the chip removal mechanism that is used for water pressure to strike and discharges the inside stone bits of.
2. An electric impact rock drill according to claim 1, characterized in that:
chip removal mechanism including set firmly in the bottom plate of square tube upper surface, the left end fixedly connected with curb plate of bottom plate, the bottom plate the curb plate with the preceding back upper right wall in inner box chamber encloses into a hydraulic pressure chamber, be equipped with on the left wall in hydraulic pressure chamber and run through the delivery port of curb plate, the right side of delivery port be connected with set firmly in the hydraulic pump of bottom plate upper surface, the left side of delivery port is connected with the sufficient water pipe of length, the left end of water pipe with be located the inside hydraulic pressure pipe connection of drill bit, the left end of hydraulic pressure pipe is equipped with the V-arrangement delivery port that is used for avoiding the export rightwards of the upper and lower shape symmetry of being stopped up when assaulting, be equipped with in the hydraulic pressure chamber roof and be used for watered first water lid, be equipped with directly over first water lid be used for watered with the second water lid of first water lid intercommunication.
3. An electric impact rock drill according to claim 1, characterized in that: the feed mechanism include with the second motor of front and back position symmetry of the right wall butt in outer case chamber, the left end of second motor be connected with the left end with the left wall in outer case chamber rotates the threaded rod of connecting, the right side threaded connection of threaded rod has two nuts, the nut is close to one side fixedly connected with connecting rod of inner box, the connecting rod with the preceding back wall fixed connection of inner box.
4. An electric impact rock drill according to claim 1, characterized in that: fixing device include with the solid fixed ring of short axis rotation front and back position symmetry of connecting, gu fixed ring is inside to be equipped with the three spring chamber of annular array, the spring chamber is kept away from the one end of short axis has set firmly the electro-magnet, the electro-magnet is close to the one end fixedly connected with extrusion spring of short axis, extrusion spring is close to the one end fixedly connected with sliding connection of short axis in the permanent magnet of spring chamber, the permanent magnet is close to the one end fixedly connected with sliding connection of short axis in the friction pad in spring chamber.
5. An electric impact rock drill according to claim 4, characterized in that: two bracing pieces of solid fixed ring's below fixedly connected with bilateral symmetry, two fixedly connected with dead lever between the bottom of bracing piece, the top fixed mounting of dead lever has the balancing weight that detachable is used for increasing stability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010160923.9A CN111088952B (en) | 2020-03-10 | 2020-03-10 | Electric impact rock drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010160923.9A CN111088952B (en) | 2020-03-10 | 2020-03-10 | Electric impact rock drill |
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| Publication Number | Publication Date |
|---|---|
| CN111088952A true CN111088952A (en) | 2020-05-01 |
| CN111088952B CN111088952B (en) | 2021-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010160923.9A Active CN111088952B (en) | 2020-03-10 | 2020-03-10 | Electric impact rock drill |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH588632A5 (en) * | 1975-03-04 | 1977-06-15 | Bosch Gmbh Robert | Impact drill with swashplate - has spring loaded pneumatic impact piston reciprocating inside tool drive sleeve |
| CN87104059A (en) * | 1987-06-02 | 1987-12-02 | 洪时伟 | Electric rock drilling equipment |
| CN86209783U (en) * | 1986-11-27 | 1987-12-12 | 湖南省冷水江市煤炭工业局 | Double screw plate type electric bore hammer |
| SU1760103A1 (en) * | 1986-09-15 | 1992-09-07 | С.Л.Сафонов | Electric hammer drill |
| CN2116073U (en) * | 1992-03-17 | 1992-09-16 | 江西宜春风动工具厂 | Electric impact rock drill |
| CN2283732Y (en) * | 1996-11-07 | 1998-06-10 | 南昌大学 | Improvement cam mating electric rock drill |
-
2020
- 2020-03-10 CN CN202010160923.9A patent/CN111088952B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH588632A5 (en) * | 1975-03-04 | 1977-06-15 | Bosch Gmbh Robert | Impact drill with swashplate - has spring loaded pneumatic impact piston reciprocating inside tool drive sleeve |
| SU1760103A1 (en) * | 1986-09-15 | 1992-09-07 | С.Л.Сафонов | Electric hammer drill |
| CN86209783U (en) * | 1986-11-27 | 1987-12-12 | 湖南省冷水江市煤炭工业局 | Double screw plate type electric bore hammer |
| CN87104059A (en) * | 1987-06-02 | 1987-12-02 | 洪时伟 | Electric rock drilling equipment |
| CN2116073U (en) * | 1992-03-17 | 1992-09-16 | 江西宜春风动工具厂 | Electric impact rock drill |
| CN2283732Y (en) * | 1996-11-07 | 1998-06-10 | 南昌大学 | Improvement cam mating electric rock drill |
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Effective date of registration: 20210401 Address after: 321000 81 Wenyuan street, Wucheng District, Jinhua City, Zhejiang Province Applicant after: Nuclear industry Jinhua Construction Group Co.,Ltd. Address before: Room 03, 5th floor, unit 1, building 12, 60 Ruida Road, high tech Development Zone, Zhengzhou City, Henan Province, 450000 Applicant before: Zhengzhou mengming Machinery Technology Co.,Ltd. |
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