CN107618114B - Double-rotation drill bit - Google Patents
Double-rotation drill bit Download PDFInfo
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- CN107618114B CN107618114B CN201710420143.1A CN201710420143A CN107618114B CN 107618114 B CN107618114 B CN 107618114B CN 201710420143 A CN201710420143 A CN 201710420143A CN 107618114 B CN107618114 B CN 107618114B
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- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 230000002441 reversible effect Effects 0.000 claims abstract description 7
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005553 drilling Methods 0.000 description 20
- 239000000463 material Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention provides a double-rotation drill bit, and belongs to the technical field of machinery. The technical problem that the existing drill bit is difficult to operate due to the fact that the reaction force of the hole wall is large when the existing drill bit works is solved. The novel coaxial type hydraulic transmission device comprises an inner shaft and an outer shaft, wherein the inner shaft and the outer shaft are coaxially arranged, a first working part is arranged on the inner shaft, a second working part is arranged on the outer shaft, the first working part and the second working part are axially arranged at intervals, and the outer shaft and the inner shaft can be connected with different driving mechanisms or the same driving mechanism and are driven by the driving mechanism to reversely rotate relatively so as to realize the cooperative work of the first working part and the second working part in a reverse relative rotation manner. The invention has the advantages of compact structure, small torsion of the hole wall to the drill rod, easy control and the like.
Description
Technical Field
The invention belongs to the technical field of machinery, relates to a drilling and tapping device, and particularly relates to a double-rotation drill bit.
Background
The drilling and perforating device is common equipment in various fields such as construction engineering, garden engineering, manufacturing industry, geological exploration and the like. Holes are formed in the ground, the wall and other materials so as to meet the requirements of finishing the operations of drilling and filling piles, installing precast piles and the like, and even finishing the preparation work of geological or wall exploration, the garden planting operation, the product manufacturing and the like. At present, the drilling and perforating equipment mainly comprises semi-automatic handheld drilling equipment and large-scale mechanical control drilling equipment, wherein the rotary power improved by a driving mechanism is transmitted to a drill bit through a transmission structure, and a cutting blade is arranged on a drill bit spindle. But when the drill bit is used for drilling, the drill bit rotates at a high speed to cut materials such as earth and stone, and simultaneously, the reaction force of the materials such as earth and stone forms huge reverse torsion for the drill bit, and the reverse torsion is transmitted to an operator through a drill rod to fight against the operator, so that the operator can hardly react the materials such as earth and stone to the torsion of the drill bit when applying the downward pressure, the difficulty of drilling is increased, the drilling precision is reduced, and even the drill is shifted and toppled over, so that drilling failure and personnel safety loss are caused. Even if the mechanical control is performed, the torsion force can also cause the adverse effects of reducing the effective mechanical power, accelerating the fatigue damage of the drill rod, reducing the service life of the connecting mechanism and the like.
In order to solve the problems existing in the prior art, long-term exploration is performed, and various solutions are proposed. For example, chinese patent literature discloses a mobile tree planting pit digger [ application number: CN201510980869.1], including petrol engine, handle frame, gear box and drill rod. The bottom of the gasoline engine is connected with the gear box, the bottom of the gear box is fixedly arranged on the supporting seat, the two ends of the supporting seat are respectively provided with a handle frame, the drill rod penetrates through the supporting seat to be connected on the gear box, the drill rod is axially provided with a spiral auger, the two ends of the supporting seat are vertically and slidably connected on the square moving frame, a positioning plate is transversely arranged between two vertical support legs which are close to the bottom on the square moving frame, and the lower end of the drill rod is provided with a double auxiliary pit digger.
According to the scheme, although the drill rod can be limited to move in the vertical direction on the square moving frame by means of the positioning plate, the square moving frame bears the torsion force born by the drill rod, when the drill rod is in drilling operation, the drill rod is not subjected to relatively small torsion force due to the existence of the square moving frame, vibration is still easy to cause, and the technical problems of control and the like are solved.
Disclosure of Invention
The invention aims to solve the problems and provide the double-rotation drill bit which is easy to control and high in operation efficiency.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the double-rotation drill bit comprises an inner shaft and an outer shaft, wherein the inner shaft and the outer shaft are coaxially arranged, a first working part is arranged on the inner shaft, a second working part is arranged on the outer shaft, the first working part and the second working part are axially arranged at intervals, and the outer shaft and the inner shaft can be connected with different driving mechanisms or the same driving mechanism and are driven by the driving mechanism to reversely rotate relatively so as to realize the cooperative work of the first working part and the second working part in a reverse relative rotation manner.
In the double-rotation drill bit, the inner shaft is arranged in the outer shaft in a penetrating manner, the first working part is positioned below the second working part, the center drill bit is arranged below the first working part, and when the first working part and the second working part work in a coordinated manner in a reverse relative rotation manner, the circumferential reaction force can be offset or at least partially offset.
In the double-rotation drill bit, the first working part comprises a plurality of first shovel bodies which are circumferentially distributed on the inner shaft and are twisted in the same direction, the second working part comprises a plurality of second shovel bodies which are circumferentially distributed on the outer shaft and are twisted in the same direction, and the twisting directions of the first shovel bodies and the second shovel bodies are opposite.
In the double-rotation drill bit, the first shovel body is obliquely upwards arranged; the second shovel body is arranged obliquely downwards or horizontally or obliquely upwards.
In the double-rotation drill bit, a plurality of first teeth are arranged on the lower side of the first shovel body in the torsion direction, the thickness of the outer end of each first tooth is smaller than that of the inner end, and an arc conical surface is arranged between two adjacent first teeth; the lower side of the torsion direction of the second shovel body is provided with a plurality of second teeth, the thickness of the outer end of each second tooth is smaller than that of the inner end, and an arc conical surface is arranged between two adjacent second teeth.
In the double-rotation drill bit, the upper side of the first shovel body in the torsion direction is provided with an upturned part which turns upwards, the lower side of the first shovel body in the torsion direction is provided with a downwards turned part which turns downwards, and the first teeth are arranged on the downwards turned part; the thickness of the first shovel body is larger than that of the second shovel body; the length of the second shovel body is longer than that of the first shovel body.
In the double-rotation drill bit, the outer shaft is provided with at least one spiral conveying sheet arranged along the axial direction of the outer shaft; a bearing is arranged between the inner shaft and the outer shaft; a felt gasket is arranged between the inner shaft and the outer shaft.
In the double-rotary drill bit, the first working part comprises an inner cylinder body, an inner opening part is formed in the lower end of the inner cylinder body, the second working part comprises an outer cylinder body, an outer opening part is formed in the lower end of the outer cylinder body, the inner cylinder body and the outer cylinder body are coaxially arranged, the inner cylinder body is located in the outer cylinder body, and the lower ends of the inner opening part and the outer opening part are flush.
In the double-rotation drill bit, the side wall of the outer cylinder body is provided with at least one side through hole, and the lower end of the side through hole is provided with a notch positioned at the outer opening part.
In the double-rotation drill bit, the center of the inner cylinder body is provided with the connecting stud, the lower end of the inner shaft is provided with the connecting screw hole, the connecting stud is in threaded connection with the connecting screw hole, the center of the connecting stud is provided with the mounting hole, and the center drill bit is fixedly inserted into the mounting hole.
In the double-rotation drill bit, the outer shaft and the inner shaft are respectively connected with the same driving mechanism through transmission structures.
In the double-rotation drill bit, the transmission structure comprises a base, an outer shaft power output shaft is rotationally connected to the base, the outer shaft power output shaft is cylindrical, an inner shaft power output shaft penetrates through the outer shaft power output shaft, an inner gear ring is arranged at the upper end of the outer shaft power output shaft, an outer gear is arranged at the upper end of the inner shaft power output shaft and is positioned in the inner gear ring, an annular space is formed between the outer gear and the inner gear ring, and a power gear capable of being meshed with the outer gear and the inner gear ring at the same time is arranged in the annular space and connected with the driving mechanism.
In the double-rotation drill bit, the outer shaft power output shaft is connected with the outer shaft through the detachable structure, the inner shaft power output shaft is connected with the inner shaft through the detachable structure, a first bearing is arranged between the outer shaft power output shaft and the base, a second bearing is arranged between the inner shaft power output shaft and the base, the power gear is connected with the driving mechanism through the gear shaft, and a third bearing is arranged between the gear shaft and the base.
Compared with the prior art, the invention has the advantages that:
1. The invention is provided with the inner shaft and the outer shaft which are oppositely rotated to cooperatively work during operation, and can offset or at least partially offset the circumferential reaction force, thereby greatly reducing or even eliminating the circumferential torsion force born by the whole drill bit, enhancing the easy operability of the invention and being not easy to cause damage to operators.
2. The first working part and the second working part can be matched with each other to carry out secondary crushing on the separated materials between the first working part and the second working part, the drilling effect is good, and the fluidity of the separated materials is improved, so that the follow-up discharge is facilitated.
3. Because the length of the second shovel body is greater than that of the first shovel body, the two can respectively carry out drilling operation in different transverse ranges, the regional segmentation operation is realized, the drilling resistance is greatly reduced, and the power requirement on a driving mechanism is reduced.
4. When the same driving mechanism is adopted to drive the inner shaft and the outer shaft to rotate, the input power of the invention is one-to-two, the structure is compact, the volume is small, the synchronism is good, and the energy conservation and the environmental protection are realized.
Drawings
FIG. 1 is a schematic view of the structure of embodiment 1 of the present invention;
FIG. 2 is a cross-sectional view of the internal structure of FIG. 1;
FIG. 3 is an exploded view of FIG. 1;
FIG. 4 is an enlarged view of a portion of FIG. 1;
Fig. 5 is a schematic structural view of embodiment 2;
fig. 6 is a partial cross-sectional view of fig. 5.
In the drawing, an inner shaft 1, a connection screw hole 11, an outer shaft 2, a screw conveying sheet 21, a felt washer 22, a bearing 23, a first working portion 3, a center bit 31, a first blade 32, a first tooth 33, an arc cone 331, an upturned portion 34, a downturned portion 35, a second working portion 4, a second blade 41, a second tooth 42, an inner cylinder 5, an inner hole portion 51, a connection stud 52, a mounting hole 53, an outer cylinder 6, an outer hole portion 61, a side through hole 62, a notch 621, a base 7, an outer shaft power output shaft 71, an inner shaft power output shaft 72, ring gears 73, 74, a first bearing 75, a second bearing 76, and a third bearing 77.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
Example 1
As shown in fig. 1-4, a double-rotation drill bit comprises an inner shaft 1 and an outer shaft 2, wherein the inner shaft 1 and the outer shaft 2 are coaxially arranged, a first working part 3 is arranged on the inner shaft 1, a second working part 4 is arranged on the outer shaft 2, the first working part 3 and the second working part 4 are axially arranged at intervals, and the outer shaft 2 and the inner shaft 1 can be connected with different driving mechanisms or the same driving mechanism and reversely and relatively rotate under the driving of the driving mechanism so as to realize the cooperative work of the first working part 3 and the second working part 4 in a reverse relative rotation mode. Specifically, the inner shaft 1 is inserted into the outer shaft 2, the first working portion 3 is located below the second working portion 4, a center drill 31 is disposed below the first working portion 3, and when the first working portion 3 and the second working portion 4 cooperatively work in opposite relative rotation, the circumferential reaction force can be offset or at least partially offset. Specifically, as shown in fig. 1 to 4, the first working portion 3 includes a plurality of first shovel bodies 32 circumferentially distributed on the inner shaft 1 and twisted in the same direction, the second working portion 4 includes a plurality of second shovel bodies 41 circumferentially distributed on the outer shaft 2 and twisted in the same direction, and the twisting directions of the first shovel bodies 32 and the second shovel bodies 41 are opposite.
Preferably, the first shovel 32 is disposed obliquely upward; the second shovel 41 is arranged obliquely downwards, horizontally or obliquely upwards. Preferably, a plurality of first teeth 33 are arranged at the lower side of the first shovel body 32 in the torsion direction, the thickness of the outer end of each first tooth 33 is smaller than that of the inner end, and an arc conical surface 331 is arranged between two adjacent first teeth 33; the lower side of the second shovel 41 in the torsion direction is provided with a plurality of second teeth 42, the thickness of the outer end of each second tooth 42 is smaller than that of the inner end, and an arc conical surface 331 is arranged between two adjacent second teeth 42. Preferably, the upper side of the first shovel 32 in the torsion direction is provided with an upturned part 34 turned upwards, the lower side of the first shovel 32 in the torsion direction is provided with a downturned part 35 turned downwards, and the first teeth 33 are arranged on the downturned part 35; the thickness of the first shovel 32 is larger than that of the second shovel 41; the length of the second shovel 41 is greater than the length of the first shovel 32. Preferably, the outer shaft 2 is provided with at least one screw conveyor 21 arranged axially along the outer shaft 2; a bearing 23 is arranged between the inner shaft 1 and the outer shaft 2; a felt washer 22 is also arranged between the inner shaft 1 and the outer shaft 2.
In this embodiment, the outer shaft 2 and the inner shaft 1 are connected to the same driving mechanism through transmission structures, respectively. Specifically, the transmission structure includes a base 7, the base 7 on rotate and be connected with outer axle power take off shaft 71, outer axle power take off shaft 71 be the tube-shape and wear to be equipped with interior axle power take off shaft 72 in outer axle power take off shaft 71, the upper end of outer axle power take off shaft 71 have ring gear 73, the upper end of interior axle power take off shaft 72 have external gear 74, external gear 74 be located ring gear 73, form the annular space between external gear 74 and ring gear 73, the annular space in be equipped with the power gear that can mesh with external gear 74 and ring gear 73 simultaneously, power gear link to each other with actuating mechanism. Still further, the outer shaft power output shaft 71 is connected with the outer shaft 2 through a detachable structure, the inner shaft power output shaft 72 is connected with the inner shaft 1 through a detachable structure, a first bearing 75 is arranged between the outer shaft power output shaft 71 and the base 7, a second bearing 76 is arranged between the inner shaft power output shaft 72 and the base 7, the power gear is connected with the driving mechanism through a gear shaft, and a third bearing 77 is arranged between the gear shaft and the base 7. It will be appreciated by those skilled in the art that the ring gear 73 is meshed with the power gear, the direction of rotation of the ring gear 73 is opposite to the direction of rotation of the power gear, and the external gear 74 is meshed with the power gear, the direction of rotation of the external gear 74 is the same as the direction of rotation of the power gear, i.e., the external gear 74 is opposite to the direction of rotation of the ring gear 73. So that the rotation directions of the inner shaft 1 and the outer shaft 2 are opposite when the double-twist drill is in operation.
The working procedure of this embodiment is as follows:
The driving mechanism drives the first working part 3 to rotate through the inner shaft 1, the center drill bit 31 rotates synchronously with the first working part, and a drill point is arranged at the end part of the center drill bit 31. At the same time, the driving mechanism drives the second working part 4 to reversely and synchronously rotate through the outer shaft 2. During drilling operations, the drill tip first contacts the surface to be drilled and drills into the area to be drilled for preliminary positioning. At this time, the drill bit receives small reaction force due to the small size of the drill tip, and the preliminary positioning of the drill hole is performed in a state where the operator is easy to control.
As the bi-rotary drill bit continues to drill, the first blade 32 drills into the area to be drilled and the first teeth 33 on the first blade 32 strip material, which is located on the first blade 32. As the bi-rotary drill continues to be driven, the second blade 41 fixed to the outer shaft 2 contacts the material peeled off by the first blade 32, and the second blade 41 can also independently perform the material peeling operation. Since the driving mechanism drives the second shovel 41 to rotate in the direction opposite to the rotation direction of the first shovel 32 through the outer shaft 2, the material between the second shovel 41 and the first shovel 32 can be secondarily crushed by the two in cooperation with each other. Therefore, the crushing effect is better, and the fluidity of the crushed material can be effectively increased. In addition, when the second shovel body 41 is longer than the first shovel body 32 in transverse direction, the first shovel body 32 and the second shovel body 41 can be respectively mutually matched for drilling, so that the holes are formed by the first shovel body 32 and the second shovel body 41 in a hole-forming mode, stress dispersion is realized, the stress intensity is reduced, the whole zero operation is realized, and the power intensity requirement on a driving mechanism can be reduced. The auger delivery blade 21 is capable of delivering the material broken by the first blade 32 and the second blade 41 in the axial direction so as to be output out of the hole, without stopping rotation.
The arrangement of the first teeth 33 and the second teeth 42 allows the first shovel 32 and the second shovel 41 to have smaller contact surfaces when contacting the material, aiming at obtaining larger pressure and crushing the material more easily. In order to facilitate the screw conveyor sheets 21 to receive the crushed material, the number of screw conveyor sheets 21 is the same as the number of second blades 41 and is set in one-to-one correspondence, and the crushed material can be conveyed to the corresponding screw conveyor sheets 21 along the inclined surfaces of the second blades 41. Preferably, the second shovel 41 is correspondingly provided at the lower end of the screw conveyor 21 and integrally connected with the screw conveyor.
Obviously, the embodiment can be garden drilling equipment such as an earth drill and the like, and can also be drilling equipment applied to other fields.
Example 2
The working principle of this embodiment is basically the same as that of embodiment 1, except that, as shown in fig. 5 and 6, the first working portion 3 includes an inner cylinder 5, an inner opening portion 51 is provided at the lower end of the inner cylinder 5, the second working portion 4 includes an outer cylinder 6, an outer opening portion 61 is provided at the lower end of the outer cylinder 6, the inner cylinder 5 and the outer cylinder 6 are coaxially arranged, and the inner cylinder 5 is located in the outer cylinder 6, and the lower ends of the inner opening portion 51 and the outer opening portion 61 are flush. The side wall of the outer cylinder 6 is provided with at least one side through hole 62, and the lower end of the side through hole 62 is provided with a notch 621 positioned at the outer opening 61. The center of the inner cylinder body 5 is provided with a connecting stud 52, the lower end of the inner shaft 1 is provided with a connecting screw hole 11, the connecting stud 52 is in threaded connection with the connecting screw hole 11, the center of the connecting stud 52 is provided with a mounting hole 53, and the center drill bit 31 is fixedly inserted into the mounting hole 53. The screw thread direction of the connecting stud is opposite to the rotation direction of the inner cylinder body 5, and in the operation process, the connecting screw thread pair of the inner cylinder body 5 is continuously enhanced to prevent loosening.
The working procedure of this embodiment is as follows:
The driving mechanism drives the first working part 3 to rotate through the inner shaft 1, the center drill bit 31 rotates along with the rotation, the drill tip is arranged at the end part of the center drill bit 31, the drill tip firstly contacts the surface to be drilled and drills into the area to be drilled to perform preliminary positioning during drilling operation, and at the moment, the drill tip is small in size and small in reaction force, and the preliminary positioning of drilling is performed under the condition that an operator easily controls the drill tip. The inner opening portion 51 and the outer opening portion 61 contact the surface to be opened, cutting is performed by pressing down and rotating friction, while the rotation directions of the inner opening portion 51 and the outer opening portion 61 are different, the directions of the reaction forces received by the inner opening portion 51 and the outer opening portion 61 are opposite, and when two opposite forces are simultaneously transmitted to the connection portion, the two opposite forces cancel each other, at least the canceling portions, so that the operator can control more easily.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although terms such as the inner shaft 1, the connection screw hole 11, the outer shaft 2, the screw conveying sheet 21, the felt washer 22, the bearing 23, the first working portion 3, the center bit 31, the first blade 32, the first teeth 33, the arc tapered surface 331, the upturned portion 34, the upturned portion 35, the second working portion 4, the second blade 41, the second teeth 42, the inner cylinder 5, the inner opening portion 51, the connection stud 52, the mounting hole 53, the outer cylinder 6, the outer opening portion 61, the side through hole 62, the notch 621, the base 7, the outer shaft power output shaft 71, the inner shaft power output shaft 72, the ring gear 73, the outer gear 74, the first bearing 75, the second bearing 76, the third bearing 77, etc. are used more herein, the possibility of using other terms is not excluded. These terms are only used to more conveniently describe and explain the nature of the invention and should be construed in a manner consistent with their spirit and scope.
Claims (11)
1. The double-rotation drill bit comprises an inner shaft (1) and an outer shaft (2), wherein the inner shaft (1) and the outer shaft (2) are coaxially arranged, and the double-rotation drill bit is characterized in that a first working part (3) is arranged on the inner shaft (1), a second working part (4) is arranged on the outer shaft (2), the first working part (3) and the second working part (4) are axially arranged at intervals, and the outer shaft (2) and the inner shaft (1) can be connected with different driving mechanisms or the same driving mechanism and reversely and relatively rotate under the driving of the driving mechanism so as to realize the opposite relative rotation of the first working part (3) and the second working part (4) to cooperatively work;
The first working part (3) comprises a plurality of first shovel bodies (32) which are circumferentially distributed on the inner shaft (1) and are twisted in the same direction, the second working part (4) comprises a plurality of second shovel bodies (41) which are circumferentially distributed on the outer shaft (2) and are twisted in the same direction, and the twisting directions of the first shovel bodies (32) and the second shovel bodies (41) are opposite;
the inner shaft (1) is arranged in the outer shaft (2) in a penetrating way, the first working part (3) is positioned below the second working part (4), a center drill bit (31) is arranged below the first working part (3), and when the first working part (3) and the second working part (4) work in a coordinated way in a reverse relative rotation way, the circumferential reaction force can be offset or at least partially offset.
2. The bi-rotary drill bit according to claim 1, wherein the first spade body (32) is disposed obliquely upward; the second shovel body (41) is arranged obliquely downwards or horizontally or obliquely upwards.
3. The double-rotation drill bit according to claim 2, wherein a plurality of first teeth (33) are arranged on the lower side of the first shovel body (32) in the torsion direction, the thickness of the outer end of each first tooth (33) is smaller than that of the inner end, and an arc conical surface (331) is arranged between two adjacent first teeth (33); the lower side of the torsion direction of the second shovel body (41) is provided with a plurality of second teeth (42), the thickness of the outer end of each second tooth (42) is smaller than that of the inner end, and an arc conical surface (331) is arranged between two adjacent second teeth (42).
4. A bi-rotary drill bit according to claim 3, wherein the upper side of the first shovel body (32) in the torsion direction has an upturned portion (34) turned upwards, the lower side of the first shovel body (32) in the torsion direction has a downturned portion (35) turned downwards, and the first teeth (33) are disposed on the downturned portion (35); the thickness of the first shovel body (32) is larger than that of the second shovel body (41); the length of the second shovel body (41) is longer than that of the first shovel body (32).
5. A double-twist drill according to any one of claims 1-4, characterized in that the outer shaft (2) is provided with at least one screw conveyor (21) arranged axially along the outer shaft (2); a bearing (23) is arranged between the inner shaft (1) and the outer shaft (2); a felt gasket (22) is arranged between the inner shaft (1) and the outer shaft (2).
6. The double-rotary drill bit according to claim 5, wherein the first working part (3) comprises an inner cylinder (5), an inner opening part (51) is arranged at the lower end of the inner cylinder (5), the second working part (4) comprises an outer cylinder (6), an outer opening part (61) is arranged at the lower end of the outer cylinder (6), the inner cylinder (5) and the outer cylinder (6) are coaxially arranged, the inner cylinder (5) is positioned in the outer cylinder (6), and the lower ends of the inner opening part (51) and the outer opening part (61) are flush.
7. The double-rotary drill bit according to claim 6, wherein the side wall of the outer cylinder (6) is provided with at least one side through hole (62), and the lower end of the side through hole (62) is provided with a notch (621) positioned at the outer opening part (61).
8. The double-rotary drill bit according to claim 6, wherein the center of the inner cylinder body (5) is provided with a connecting stud (52), the lower end of the inner shaft (1) is provided with a connecting screw hole (11), the connecting stud (52) is in threaded connection with the connecting screw hole (11), the center of the connecting stud (52) is provided with a mounting hole (53), and the center drill bit (31) is fixedly inserted into the mounting hole (53).
9. A bi-rotary drill bit according to claim 1 or 2 or 3 or 4, characterized in that the outer shaft (2) and the inner shaft (1) are connected to the same drive mechanism by means of transmission structures, respectively.
10. The double-rotation drill bit according to claim 9, wherein the transmission structure comprises a base (7), an outer shaft power output shaft (71) is rotatably connected to the base (7), the outer shaft power output shaft (71) is cylindrical, an inner shaft power output shaft (72) is arranged in the outer shaft power output shaft (71) in a penetrating mode, an inner gear ring (73) is arranged at the upper end of the outer shaft power output shaft (71), an outer gear (74) is arranged at the upper end of the inner shaft power output shaft (72), the outer gear (74) is located in the inner gear ring (73), an annular space is formed between the outer gear (74) and the inner gear ring (73), a power gear capable of being meshed with the outer gear (74) and the inner gear ring (73) is arranged in the annular space, and the power gear is connected with the driving mechanism.
11. The double-rotation drill bit according to claim 10, characterized in that the outer shaft power output shaft (71) is connected with the outer shaft (2) through a detachable structure, the inner shaft power output shaft (72) is connected with the inner shaft (1) through a detachable structure, a first bearing (75) is arranged between the outer shaft power output shaft (71) and the base (7), a second bearing (76) is arranged between the inner shaft power output shaft (72) and the base (7), the power gear is connected with the driving mechanism through a gear shaft, and a third bearing (77) is arranged between the gear shaft and the base (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710420143.1A CN107618114B (en) | 2017-06-06 | 2017-06-06 | Double-rotation drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710420143.1A CN107618114B (en) | 2017-06-06 | 2017-06-06 | Double-rotation drill bit |
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| Publication Number | Publication Date |
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| CN107618114A CN107618114A (en) | 2018-01-23 |
| CN107618114B true CN107618114B (en) | 2024-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710420143.1A Active CN107618114B (en) | 2017-06-06 | 2017-06-06 | Double-rotation drill bit |
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| CN (1) | CN107618114B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108834614A (en) * | 2018-06-11 | 2018-11-20 | 安徽省大地园林工程有限公司 | A kind of multi-functional municipal plant maintenance machine |
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| WO2003025327A1 (en) * | 2001-09-20 | 2003-03-27 | Shell Internationale Research Maatschappij B.V. | Percussion drilling head |
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2017
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| CN101343982A (en) * | 2008-08-22 | 2009-01-14 | 北京市三一重机有限公司 | Double-layer barrel type drilling tool |
| CN103551631A (en) * | 2013-10-28 | 2014-02-05 | 苏州天健旋切技术有限公司 | Rotary bisection drill |
| CN105003200A (en) * | 2015-07-03 | 2015-10-28 | 左红 | Hole drilling equipment and hole drilling method of hole drilling equipment |
| CN206825705U (en) * | 2017-06-06 | 2018-01-02 | 宁波鼎科电器有限公司 | Bispin drill bit |
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| CN107618114A (en) | 2018-01-23 |
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