CN210239669U - Center hob composite drill bit - Google Patents
Center hob composite drill bit Download PDFInfo
- Publication number
- CN210239669U CN210239669U CN201921090774.2U CN201921090774U CN210239669U CN 210239669 U CN210239669 U CN 210239669U CN 201921090774 U CN201921090774 U CN 201921090774U CN 210239669 U CN210239669 U CN 210239669U
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- hob
- center
- cutting edge
- end surface
- wall
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Abstract
The utility model discloses a compound drill bit of center hob relates to mechanical technical field, including last installation piece, last closing cap, cutting edge part, cutting edge support bearing, center hob part, center hob bearing, lower closing cap, installation piece, center pin down, go up closing cap up end and last installation piece down terminal surface rigid connection, terminal surface and center pin up end rigid connection under the upper cover, terminal surface and cutting edge part up end contact cooperation under the upper cover, cutting edge support bearing rigid mounting is between cutting edge part inner wall and center pin outer wall, terminal surface rigid connection under lower closing cap up end and the center pin, terminal surface and lower installation piece up end rigid connection under the lower closing cap, center hob bearing rigid mounting is between center hob part inner wall and center pin outer wall. The utility model relates to a scheme can show the ground and improve the drilling efficiency of compound drill bit in hard stratum, the stratum of high abrasiveness, reduces the drilling cost.
Description
Technical Field
The utility model belongs to the technical field of the mechanical skill and specifically relates to a compound drill bit of center hobbing cutter.
Background
The shield machine is widely applied to the fields of current drilling and production, tunnel construction and the like, but the hob structure used by the current shield machine is complex and has lower working efficiency, so that the drilling cost is higher.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above-mentioned defect that exists among the prior art, the utility model provides a center hobbing cutter composite drill bit.
The utility model provides a technical scheme that its technical problem adopted is: a center hob composite drill bit comprises an upper mounting block, an upper sealing cover, a cutting edge part, a cutting edge supporting bearing, a center hob part, a center hob bearing, a lower sealing cover, a lower mounting block and a central shaft, the upper end surface of the upper sealing cover is rigidly connected with the lower end surface of the upper mounting block, the lower end surface of the upper sealing cover is rigidly connected with the upper end surface of the central shaft, the lower end surface of the upper sealing cover is in contact fit with the upper end surface of the cutting edge part, the cutting edge supporting bearing is rigidly arranged between the inner wall of the cutting edge part and the outer wall of the central shaft, the lower end face of the cutting edge part is in contact fit with the upper end face of the central hob part, the lower end face of the central hob part is in contact fit with the upper end face of the lower sealing cover, the upper end surface of the lower sealing cover is rigidly connected with the lower end surface of the central shaft, the lower end surface of the lower sealing cover is rigidly connected with the upper end surface of the lower mounting block, the central hob bearing is rigidly arranged between the inner wall of the central hob part and the outer wall of the central shaft.
In the above center hob composite drill, the cutting edge part is made of cemented carbide.
In the above-mentioned center hob composite drill bit, the center hob part is made of cemented carbide.
The beneficial effects of the utility model are that, the utility model relates to a scheme can show and improve the drilling efficiency of compound drill bit in hard stratum, the stratum of high abrasiveness, reduces the drilling cost.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a schematic sectional view of the present invention;
fig. 2 is a schematic view of the overall assembly structure of the present invention.
In the figure, 1, an upper mounting block, 2, an upper sealing cover, 3, a cutting edge part, 4, a cutting edge supporting bearing, 5, a central hob part, 6, a central hob bearing, 7, a lower sealing cover, 8, a lower mounting block and 9, a central shaft are arranged.
Detailed Description
In order to more clearly illustrate the technical solution of the present invention, the following provides a further description of the present invention with reference to the accompanying drawings, and obviously, the following described drawings are only one embodiment of the present invention, and for those skilled in the art, other embodiments can be obtained according to the drawings and the embodiment without any creative work, and all belong to the protection scope of the present invention.
A center hob composite drill bit comprises an upper mounting block 1, an upper sealing cover 2, a cutting edge part 3, a cutting edge supporting bearing 4, a center hob part 5, a center hob bearing 6, a lower sealing cover 7, a lower mounting block 8 and a center shaft 9, wherein the upper end surface of the upper sealing cover 2 is rigidly connected with the lower end surface of the upper mounting block 1, the lower end surface of the upper sealing cover 2 is rigidly connected with the upper end surface of the center shaft 9, the lower end surface of the upper sealing cover 2 is in contact fit with the upper end surface of the cutting edge part 3, the cutting edge supporting bearing 4 is rigidly mounted between the inner wall of the cutting edge part 3 and the outer wall of the center shaft 9, the lower end surface of the cutting edge part 3 is in contact fit with the upper end surface of the center hob part 5, the lower end surface of the center hob part 5 is in contact fit with the upper end surface of the lower sealing cover 7, the upper end surface of the lower sealing cover 7 is rigidly connected with the lower end surface, the central hob bearing 6 is rigidly mounted between the inner wall of the central hob part 5 and the outer wall of the central shaft 9.
In detail, the cutting edge portion 3 is made of cemented carbide and the central hob portion 5 is made of cemented carbide.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Various modifications and equivalents of the invention can be made by those skilled in the art within the spirit and scope of the invention, and such modifications and equivalents should also be considered as falling within the scope of the invention.
Claims (3)
1. The utility model provides a compound drill bit of center hob, includes installation piece (1), goes up closing cap (2), cutting edge part (3), cutting edge support bearing (4), center hob part (5), center hob bearing (6), lower closing cap (7), installation piece (8), center pin (9) down, its characterized in that: the upper end surface of the upper sealing cover (2) is rigidly connected with the lower end surface of the upper mounting block (1), the lower end surface of the upper sealing cover (2) is rigidly connected with the upper end surface of the central shaft (9), the lower end surface of the upper sealing cover (2) is in contact fit with the upper end surface of the cutting edge part (3), the cutting edge supporting bearing (4) is rigidly arranged between the inner wall of the cutting edge part (3) and the outer wall of the central shaft (9), the lower end surface of the cutting edge part (3) is in contact fit with the upper end surface of the central hob part (5), the lower end face of the central hob part (5) is in contact fit with the upper end face of the lower sealing cover (7), the upper end surface of the lower sealing cover (7) is rigidly connected with the lower end surface of the central shaft (9), the lower end surface of the lower sealing cover (7) is rigidly connected with the upper end surface of the lower mounting block (8), the central hob bearing (6) is rigidly arranged between the inner wall of the central hob part (5) and the outer wall of the central shaft (9).
2. A center hob composite drill according to claim 1, characterized in, that said cutting edge portion (3) is made of cemented carbide.
3. A center hob composite drill bit according to claim 1, characterized in, that the center hob portion (5) is made of cemented carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921090774.2U CN210239669U (en) | 2019-07-12 | 2019-07-12 | Center hob composite drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921090774.2U CN210239669U (en) | 2019-07-12 | 2019-07-12 | Center hob composite drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210239669U true CN210239669U (en) | 2020-04-03 |
Family
ID=69990876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921090774.2U Active CN210239669U (en) | 2019-07-12 | 2019-07-12 | Center hob composite drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210239669U (en) |
-
2019
- 2019-07-12 CN CN201921090774.2U patent/CN210239669U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |