CN210370503U - Drill bit for engineering machinery - Google Patents
Drill bit for engineering machinery Download PDFInfo
- Publication number
- CN210370503U CN210370503U CN201921297545.8U CN201921297545U CN210370503U CN 210370503 U CN210370503 U CN 210370503U CN 201921297545 U CN201921297545 U CN 201921297545U CN 210370503 U CN210370503 U CN 210370503U
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- China
- Prior art keywords
- drill
- central
- teeth
- base body
- construction machinery
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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.)
- Expired - Fee Related
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- 230000007704 transition Effects 0.000 claims abstract description 10
- 238000005553 drilling Methods 0.000 claims description 9
- 238000010276 construction Methods 0.000 claims 7
- 239000011435 rock Substances 0.000 description 19
- 238000005520 cutting process Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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Abstract
The utility model provides a drill bit for engineering machinery, which comprises a base body, a central drill body arranged in the middle of the bottom of the base body and drill teeth arranged around the central rotating body at the bottom of the base body; the outer side surfaces of the drill teeth and the outer side surface of the base body are in arc transition, the inward sides of the drill teeth are gradually narrowed to form connecting arms, and the connecting arms extend towards one side of the central drill body and are finally fixedly connected with the central drill body; the lowest edge of the drill tooth is provided with a spherical drill bit part; the part of the central drill body connected with the base body is provided with an arc transition part, and the base body is provided with a plurality of nozzles at the position between the central drill body and the drill teeth avoiding the connecting arm. The utility model discloses create structural design reasonable, intensity is high, long service life.
Description
Technical Field
The invention belongs to the technical field of engineering machinery equipment accessories, and particularly relates to a drill bit for engineering machinery.
Background
During the operation of breaking rock in stratum, for the upper stratum with high plasticity and low hardness, the scraper drill bit which is usually manufactured by taking large shearing as a rock breaking mechanism breaks rock, the stratum structures of all regions are different, in the rock breaking process, when a hard stratum or a hard interlayer with staggered hardness and hardness is encountered, not only is the drill bit difficult to cut in, but also the drill bit is easy to damage, the service life is low, once the drill bit is broken, a large amount of time is usually spent on salvaging the drill bit to recover the rock breaking operation, and the drilling efficiency is low.
Disclosure of Invention
In view of the above, the present invention provides a drill for engineering machinery, which aims to overcome the defects in the prior art.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a drill bit for engineering machinery comprises a base body, a central drill body arranged in the middle of the bottom of the base body, and drill teeth arranged at the bottom of the base body around a central rotating body;
the outer side surfaces of the drill teeth and the outer side surface of the base body are in arc transition, the inward sides of the drill teeth are gradually narrowed to form connecting arms, and the connecting arms extend towards one side of the central drill body and are finally fixedly connected with the central drill body; the lowermost edge of the drill tooth is provided with a spherical drill bit part;
the part of the central drill body connected with the base body is provided with an arc transition part, and the base body is provided with a plurality of nozzles at the position between the central drill body and the drill teeth avoiding the connecting arm.
Furthermore, the drill teeth are connected through arc-shaped connecting parts.
Furthermore, the bottom of the central drill body is a cross-shaped, flat tooth-shaped or conical working part.
Furthermore, a plurality of cutter bodies are arranged on the inner side surfaces of the drill teeth, and the cutter bodies on the drill teeth are different in height.
Further, the base body is internally provided with a cavity, and each nozzle is communicated with the cavity.
Further, the lower end of the central drill body protrudes or is flush with the lower edge of each drill tooth.
Further, inner cutters are arranged between every two adjacent connecting arms, and the inner cutters form an annular structure surrounding the central drill body.
Further, the height of the inner cutter is smaller than that of the central drill body.
Compared with the prior art, the invention has the following advantages:
the invention has the advantages of reasonable structural design, high strength, long service life and better rock breaking capability, and can adapt to various geological working conditions such as hard strata or hard interlayers with staggered hardness and hardness.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. In the drawings:
FIG. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of a substrate with a cavity therein according to an embodiment of the present invention;
FIG. 3 is a bottom view of an embodiment of the present invention with a cutting blade;
FIG. 4 is a schematic view of a center drill body with a flat-toothed bottom according to an embodiment of the present invention;
FIG. 5 is a schematic view of a cross-bottom center drill body according to an embodiment of the present invention;
FIG. 6 is a schematic view of a center drill body with a conical bottom in an embodiment of the present invention.
Description of reference numerals:
1-a substrate; 2-a central drill body; 3, drilling teeth; 4-a linker arm; 5-drilling the head; 6-arc transition; 7-a nozzle; 8-cutter body; 9-a cavity; 10-a cutter.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
The invention will be described in detail with reference to the following embodiments with reference to the attached drawings.
A drill bit for engineering machinery is disclosed, as shown in fig. 1 to 6, comprising a basal body 1, a central drill body 2 at the middle position of the bottom of the basal body, and drill teeth 3 arranged at the bottom of the basal body around the central rotary body;
the outer side surfaces of the drill teeth and the outer side surface of the base body are in arc transition, the inward sides of the drill teeth are gradually narrowed to form connecting arms 4, and the connecting arms extend towards one side of the central drill body and are finally fixedly connected with the central drill body; the lowermost edge of the drill tooth is provided with a spherical drill bit part 5; during actual production, the drill bit can be manufactured in a casting processing mode, the drill bit part and other structures are integrally formed, the structural strength and the stability meet the requirements for exploiting rock strata, and the drill bit impacts the rock strata in a multi-point collapse mode, so that the exploitation efficiency of the rock strata is improved.
The part of the central drill body connected with the base body is provided with an arc transition part 6, and the base body is provided with a plurality of nozzles 7 at the positions between the central drill body and the drill teeth which avoid the connecting arm. Usually, the bottom of the center drill body is a cross-shaped, flat tooth-shaped or conical working part.
In an alternative embodiment, the drill teeth are arranged in a range of 5-8, and the drill teeth are connected through arc-shaped connecting parts to ensure the stability of the structures among the drill teeth, and the arc transition between the drill teeth and the base body has small stress, and the drill teeth are connected with the central drill body through connecting arms, so that the multiple structures strengthen the fixing action, ensure the reliability of the structure of the drill teeth and are not easy to damage even if hard rock is encountered.
In an alternative embodiment, the inner side surfaces of the drill teeth are provided with several cutter bodies 8, the height of the cutter bodies being different for each drill tooth. The cutter body can effectively impact and shear the rock stratum, particularly, a drill rod (drill bit) driven by the power head has impact in the feeding direction and rotary torque for cutting, and a better rock breaking effect is achieved.
In an alternative embodiment, as shown in fig. 2, in order to accommodate the requirements of pneumatic rock drilling, a cavity 9 (communicating with the externally connected drill rod) is provided in the base body, with which cavity the nozzles communicate. The air flow introduced through the drill pipe is ejected through the nozzle. Of course, in order to cool the drill bit, cooling water may be sprayed through the nozzle, and the drill bit is provided with a through hole (i.e., the nozzle 7), that is, has a basis for realizing a corresponding function.
The lower end of the central drill body protrudes or is flush with the lower edge of each drill tooth, generally, the protruding height is not more than 5mm, the structure of the central drill body is most stably stressed and the strength is highest, therefore, the central drill body can contact with a rock stratum mined by the drill teeth at the same time or before the drill teeth, the rock stratum is under the combined action of the central drill body and the drill teeth, gaps are reserved among the drill teeth and between the central drill body and the drill teeth, and sufficient space for breaking rock is reserved, so that the drill bit can be used for breaking rock more smoothly.
In order to further increase the cutting capacity of the drill, in an alternative embodiment, as shown in fig. 3, internal cutters 10 may be provided between two adjacent connecting arms, which internal cutters together form a ring-like structure around the central drill body. The height of the inner cutter is smaller than that of the central drill body. The cutter not only can further break rock, but also structurally strengthens the drilling teeth and even the central drilling body structure.
The invention has the advantages of reasonable structural design, high strength, long service life and better rock breaking capability, and can adapt to various geological working conditions such as hard strata or hard interlayers with staggered hardness and hardness.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.
Claims (8)
1. A kind of bit for engineering machinery, characterized by that: the drilling machine comprises a base body, a central drilling body arranged in the middle of the bottom of the base body and drilling teeth arranged at the bottom of the base body around a central rotating body;
the outer side surfaces of the drill teeth and the outer side surface of the base body are in arc transition, the inward sides of the drill teeth are gradually narrowed to form connecting arms, and the connecting arms extend towards one side of the central drill body and are finally fixedly connected with the central drill body; the lowermost edge of the drill tooth is provided with a spherical drill bit part;
the part of the central drill body connected with the base body is provided with an arc transition part, and the base body is provided with a plurality of nozzles at the position between the central drill body and the drill teeth avoiding the connecting arm.
2. A drill for construction machinery according to claim 1, wherein: the drill teeth are connected through arc-shaped connecting parts.
3. A drill for construction machinery according to claim 1, wherein: the bottom of the central drill body is a cross-shaped, flat tooth-shaped or conical working part.
4. A drill for construction machinery according to claim 1, wherein: the inner side surfaces of the drill teeth are provided with a plurality of cutter bodies, and the cutter bodies on the drill teeth are different in height.
5. A drill for construction machinery according to claim 1, wherein: the inside cavity that is equipped with of base member, each spout all communicates with this cavity.
6. A drill for construction machinery according to claim 1, wherein: the lower end of the central drill body is protruded or flush with the lower edge of each drill tooth.
7. A drill for construction machinery according to any one of claims 1 to 6, wherein: and inner cutters are arranged between every two adjacent connecting arms and form an annular structure surrounding the central drill body.
8. A drill for construction machinery according to claim 7, wherein: the height of the inner cutter is smaller than that of the central drill body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921297545.8U CN210370503U (en) | 2019-08-12 | 2019-08-12 | Drill bit for engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921297545.8U CN210370503U (en) | 2019-08-12 | 2019-08-12 | Drill bit for engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210370503U true CN210370503U (en) | 2020-04-21 |
Family
ID=70251211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921297545.8U Expired - Fee Related CN210370503U (en) | 2019-08-12 | 2019-08-12 | Drill bit for engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210370503U (en) |
-
2019
- 2019-08-12 CN CN201921297545.8U patent/CN210370503U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200421 |