CN209025075U - A kind of drill body - Google Patents
A kind of drill body Download PDFInfo
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- CN209025075U CN209025075U CN201821426751.XU CN201821426751U CN209025075U CN 209025075 U CN209025075 U CN 209025075U CN 201821426751 U CN201821426751 U CN 201821426751U CN 209025075 U CN209025075 U CN 209025075U
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Abstract
The utility model discloses a kind of drill bodies comprising: Hollow Transmission Shafts；And hollow drill, axis are sleeved in the Hollow Transmission Shafts outward and rotate integrally with the Hollow Transmission Shafts；Wherein, the Hollow Transmission Shafts are axially spaced offers top discharge mouth and lower discharge port；The axially spaced setting top nozzle of hollow drill and lower nozzle；The hollow drill can be mobile relative to the Hollow Transmission Shafts axial reciprocating, and when into boring, the lower discharge port and the lower nozzle are conducted；When moving back brill, the top discharge mouth and the top nozzle are conducted.The drill body of this spline structure can realize corresponding required lower nozzle jet body or top nozzle jet flow body without artificial switched conductive mode, and then can make drill body uniform stirring to guarantee the overall structural strength of cement mixing method when into boring or moving back brill automatically.
Description
Technical field
The utility model relates to pile foundation construction field more particularly to a kind of drill bodies for carrying out pile foundation construction.
Background technique
Cement mixing method is a kind of method for reinforcing saturation and Soft Clay Foundation, it is using cement as solidification
Agent utilizes institute between curing agent and weak soil in ground depths by weak soil and curing agent action of forced stirring by special Mixing Machine
The a series of physical of generation chemically reacts, and makes weak soil scleroma at the high-quality ground with globality, water stability and some strength.
Existing stake machine is when carrying out cement-soil stirring pile construction operation, using the shape in drilling rod lower end setting mouth spray
Formula carries out bottom whitewashing when into boring, and cement slurry, which cannot stir, when brill is moved back in drilling rod reversion causes stirring uneven, and then influences
The overall structural strength of cement mixing method.
In view of the above-mentioned problems, the prior art provides a kind of cement-soil mixing pile device that can convert whitewashing up and down, the water
Soil mixing pile device includes drilling rod, is built in drilling rod and successively the combined type inlet pipe of axial connection, Pneumatic valve, the side of drilling rod
Wall offers the upper mouth spray and lower mouth spray for being respectively communicated with inlet pipe；On the Pneumatic valve is controlled by inflating and being vented
The switched conductive of mouth spray, lower mouth spray and combined type inlet pipe.
Drilling rod bottom is whitewashed when above-mentioned cement-soil mixing pile device can be realized lower brill although, and drilling rod top is sprayed when above mentioning
Slurry, still, the switched conductive of upper mouth spray, lower mouth spray and combined type inlet pipe need to pull the mode of Pneumatic valve control switch
To realize operation control, therefore, the degree of automation is not good enough.
Utility model content
There is shortage automatic control top nozzle utility model aims to solve existing drilling rod and the switching of lower nozzle is led
The problem of logical work.
To realize the purpose of this utility model, the utility model uses following technical scheme:
A kind of drill body has following feature, comprising:
Hollow Transmission Shafts；With
Hollow drill, axis are sleeved in the Hollow Transmission Shafts outward and rotate integrally with the Hollow Transmission Shafts；
Wherein, the Hollow Transmission Shafts are axially spaced offers top discharge mouth and lower discharge port；The hollow drill edge
Top nozzle and lower nozzle is arranged in axially spaced-apart；
The hollow drill can be mobile relative to the Hollow Transmission Shafts axial reciprocating, when into boring, the lower discharge port
It is conducted with the lower nozzle；When moving back brill, the top discharge mouth and the top nozzle are conducted.
Further, in above-mentioned drill body, the spacing between the top nozzle and the lower nozzle is also had the feature that
For distance L1, the spacing between the top discharge mouth and the lower discharge port is distance L2, and the bore of the top discharge mouth is straight
Diameter D, and the sum of distance L2 and diameter D are equal to distance L1；
The hollow drill is provided in the axial direction with waist-shaped hole, and the Hollow Transmission Shafts are radially mounted to be had through the waist type
The bar in hole, reciprocating movement distance of the bar in the waist-shaped hole are equal to the diameter D.
Further, in above-mentioned drill body, also have the feature that the Hollow Transmission Shafts include the upper axis axially docked
Section and lower shaft part；
The hollow drill axis is sleeved on the lower shaft part of the Hollow Transmission Shafts outward, and between top discharge mouth and lower discharge port
Separate the lower shaft part set on the Hollow Transmission Shafts；
Described, the periphery wall of lower shaft part has an at least flat face, and the hollow drill is opened up in top end surface along axial direction
Match the profiling hole of the lower shaft part.
Further, it in above-mentioned drill body, also has the feature that further include: the elasticity being built in the profiling hole
Element, the both ends of the elastic element abut the bottom hole of profiling hole and the lower end of the lower shaft part respectively.
Further, in above-mentioned drill body, also have the feature that the lower end of the hollow drill is provided with cutting portion,
The cutting portion includes:
It is formed with the apex point of cutting edge；With
At least one circle is configured at the screw wing on the hollow drill outer peripheral surface and close to the apex point；
Wherein, the screw wing is in the cutting edge for forming sequential like on the radial end face of apex point；
Alternatively, the screw wing in close to apex point radial end face on be arranged with multiple dismountable teeth.
Further, in above-mentioned drill body, also have the feature that the apex point around central axes configured at least two
Helical cutting edge, and each helical cutting edge is spaced apart around the central axes of the center drill rod；
Further, in above-mentioned drill body, also have the feature that there there is arranged for interval on the periphery wall of the hollow drill
Several stirring blades, and maximum rotating diameter of the stirring blade around hollow drill central axes is less than or equal to the hollow drill
Maximum drill diameter.
Further, in above-mentioned drill body, also have the feature that every two to five stirring blades around hollow drill
Central axes arrange to form a radial stirring blade group, and each radial stirring blade group is arranged along the central axes interval of hollow drill
Column；
Alternatively, each stirring blade arranges in the shape of a spiral around the periphery wall of the drilling rod.
Further, in above-mentioned drill body, also have the feature that the stirring blade relative to the transversal of hollow drill
Face is obliquely arranged.
Further, in above-mentioned drill body, also there is following feature, further includes: drive the Hollow Transmission Shafts rotation
Power device；With
It is axially sleeved ikn the rigid outer tube of power device described in the upper shaft part of the Hollow Transmission Shafts and top-supported；
The output shaft of the power device is axially connect with the upper shaft part, the bottom of the rigidity outer tube and the upper axis
It is flexibly connected between section by sliding sleeve or bearing；
The upper end circumferential surface of the rigidity outer tube opens up at least one radial passage, and the company of opening up on the internal perisporium of rigid outer tube
Lead to the annular groove of the radial passage；
Further, in above-mentioned drill body, also have the feature that the Hollow Transmission Shafts open up connection Pivot Point Center hole
With the radial hole of the annular groove,
Alternatively, the output shaft has the axial hole in connection Hollow Transmission Shafts axis hole, and the output shaft is opened
Equipped with the radial hole for being connected to the annular groove and the axial hole；
Alternatively, the rigidity outer tube is connected between the power device by tubular article, the internal perisporium of the tubular article is opened up
There is an annular groove, tubular article radially opens up the radial hole of connection itself periphery wall and the annular groove, runs through the tubular article
Output shaft there is the axial hole in connection Hollow Transmission Shafts axis hole, and the output shaft offers the connection annular
The radial hole of slot and the axial hole.
Drill body structure provided by the utility model, so that hollow drill can be mobile relative to Hollow Transmission Shafts axial reciprocating,
When into boring, under the drag effect for being cut body, hollow drill is axially moved up relative to Hollow Transmission Shafts so that top discharge mouth
It is isolated with the top nozzle, and the lower discharge port and the lower nozzle are conducted, nozzle can be to drilling region at present for this
Spray fluid；When moving back brill, under the Gravitative Loads of hollow drill, hollow drill axially moved down relative to Hollow Transmission Shafts so that
Lower discharge port and the lower nozzle are isolated, and top discharge mouth and top nozzle are conducted, and nozzle can be to stirring region at present for this
Spray fluid.Such structure design, in drill body into when boring or moving back brill, can be realized corresponding institute without artificial switched conductive mode
The lower nozzle jet body or top nozzle jet flow body needed, and then drill body uniform stirring can be made to guarantee the entirety of cement mixing method
Structural strength.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly introduced, it should be apparent that, the accompanying drawings in the following description is only some implementations of the utility model
Example, for those of ordinary skill in the art, can also be according to these attached drawings under the premise of not making the creative labor property
Obtain other accompanying drawings.
Fig. 1 is the perspective view of drill body in embodiment one.
Fig. 2 is the front view of drill body in embodiment one.
Fig. 3 is the structural schematic diagram of lower shaft part in embodiment one.
Fig. 4 is the axial sectional view of hollow drill in embodiment one.
Fig. 5 is the axial sectional view of drill body in embodiment one.
Fig. 6 is the enlarged drawing of letter A corresponding part in Fig. 5.
Fig. 7 is the enlarged drawing of letter b corresponding part in Fig. 5.
Fig. 8 is the assembling schematic diagram of hollow drill and lower shaft part in embodiment two.
Fig. 9 be in embodiment three drill body in the schematic diagram of internal structure of rigid outer tube top position.
Figure 10 be in example IV drill body in the schematic diagram of internal structure of rigid outer tube top position.
In attached drawing:
100, drill body；
1, Hollow Transmission Shafts；11, upper shaft part；12, lower shaft part；121, top discharge mouth；122, lower discharge port；123, straight
Face；124, bar；13, axle center hole；14, radial hole；15, propeller boss；
2, power device；21, output shaft；211, axial hole；212, radial hole；
3, hollow drill；31, top nozzle；32, lower nozzle；33, profiling hole；34, cutting portion；341, apex point；342, spiral
The wing；343, cutting edge；344, teeth；35, stirring blade；36, waist-shaped hole；
4, elastic element；
5, rigid outer tube；51, radial passage；52, annular groove；
6, seal；
7, arc-shaped cover；71, cammed surface；72, fastener；
8, sliding sleeve；
9, tubular article；91, annular groove；92, radial hole.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
The technical scheme in the utility model embodiment is clearly and completely described for the attached drawing of type, it is clear that described embodiment
It is the utility model a part of the embodiment, instead of all the embodiments.
<embodiment one>
As shown in Figure 1, Figure 2 and shown in Fig. 5, drill body 100 provided in this embodiment is used for the stake under cement mixing method situation
Foundation construction, the drill body 100 include: Hollow Transmission Shafts 1, power device 2, hollow drill 3 and rigid outer tube 5.
As depicted in figs. 1 and 2, the lower end of hollow drill 3 is provided with cutting portion 34, and cutting portion 34 is comprising apex point 341 and extremely
Few circle screw wing 342, specifically, apex point 341 is formed with cutting edge 343, screw wing 342 is configured at 3 outer peripheral surface of hollow drill
Upper and close apex point 341；Screw wing 342 is welded and fixed with hollow drill 3.Screw wing 342 is in the radial end face close to apex point 341
On be arranged with multiple dismountable teeth 344.Certainly, in drill body 100 provided by the utility model, screw wing 342 is in close to brill
The cutting edge of sequential like is formed on the radial end face of point 341.
As depicted in figs. 1 and 2, as a preferred technical solution, in the present embodiment, apex point 341 is configured with around central axes
The helical cutting edge 343 that at least two helical angles are 5 °~85 °, and each helical cutting edge 343 is in center drill rod
Axis is spaced apart.The body of rod and apex point 341 of hollow drill 3 are welded and fixed, alternatively, hollow drill 3 and apex point 341 by figure not
The fastener of display is screwed on fixation, alternatively, hollow drill 3 and the axial fixation that is screwed on of apex point 341.
As depicted in figs. 1 and 2, arranged for interval has several stirring blades 35, stirring blade 35 on the periphery wall of hollow drill 3
It is extended radially outwardly by the periphery wall of hollow drill 3.Certainly, rigid outer tube 5 can also be equally evenly equipped with not shown in figure
Several stirring blades 35.And maximum rotating diameter of the stirring blade 35 around 3 central axes of hollow drill is less than or equal to hollow drill 3
Maximum drill diameter, can guarantee that the full and uniform stirring of stirring blade 35 has been cut broken object or solid-liquid mixing in this way
Object.
As shown in Fig. 2, every two to five stirring blades 35 are in hollow drill 3 as a preferred technical solution,
Axis arranges to form a radial stirring blade group, and each radial stirring blade group is alternatively arranged along the central axes of hollow drill 3.?
When the drill body 100 of more such similar structures combines integral progress pile foundation construction, such structure design can be avoided brill
It is interfered between body 100.
As depicted in figs. 1 and 2, in order to reduce axial movement resistance of the drill body 100 when into boring or moving back brill, stirring blade 35
Cross section relative to hollow drill 3 is obliquely arranged.Specifically, the length direction of stirring blade 35 is perpendicular to core drill
The axial direction of bar 3, and the blade face of stirring blade 35 favours the central axes of hollow drill 3.
Certainly, similar for the drill body 100 of single running, or by more in drill body 100 provided by the utility model
The drill body 100 of structure combines the integral combination drill for carrying out pile foundation construction, when the spacing between each drill body 100 is sufficiently large and/or
Mutual revolving speed, when turning to always, each stirring blade 35 can also be that the periphery wall around hollow drill 3 arranges in the shape of a spiral.
As shown in Figures 3 to 5, the axial length of Hollow Transmission Shafts 1 is greater than the axial length of hollow drill 3, hollow transmission
Axis 1 includes upper shaft part 11 and lower shaft part 12, and Hollow Transmission Shafts 1 are axially spaced to offer top discharge mouth 121 and lower discharge port
122, it is preferred that discharge port 121 and lower discharge port 122 are spaced apart the lower shaft part 12 set on Hollow Transmission Shafts 1；3 edge of hollow drill
Top nozzle 31 and lower nozzle 32 is arranged in axially spaced-apart.When into boring, Hollow Transmission Shafts 1 make relative to axial move down of hollow drill 3
It obtains lower discharge port 122 and lower nozzle 32 is conducted, and top discharge mouth 121 and top nozzle 31 are isolated；When moving back brill, hollow transmission
Axis 1 moves up so that top discharge mouth 121 and top nozzle 31 are conducted relative to hollow drill 3 is axial, and lower discharge port 122 and lower spray
Mouth 32 is isolated.
As shown in Figures 3 to 5, specifically, power device 2 is for driving Hollow Transmission Shafts 1 to rotate, upper shaft part 11 and lower axle
Section 12 is by the axial docking of propeller boss 15 and integrated synchronous rotates.The output shaft 21 of such as figure power device 2 and upper shaft part 11 are by propeller boss axis
To connection.And hollow drill 3 can be mobile relative to 1 axial reciprocating of Hollow Transmission Shafts.
As shown in Figures 3 to 5,3 axis of hollow drill is sleeved in Hollow Transmission Shafts 1 outward and with 1 one of Hollow Transmission Shafts
Rotation.Specifically, hollow drill 3 is axially sleeved ikn the lower shaft part 12 of Hollow Transmission Shafts 1.The periphery wall of lower shaft part 12 has at least
One flat face 123, hollow drill 3 open up the profiling hole 33 for matching lower shaft part 12 in top end surface along axial direction, and such structure is set
Meter, can prevent hollow drill 3 from circumferentially rotating relative to Hollow Transmission Shafts 1.
As shown in Figures 3 to 5, in the present embodiment, the spacing between top nozzle 31 and lower nozzle 32 is linear distance L1, on
Spacing between discharge port 121 and lower discharge port 122 is linear distance L2, and the bore of top discharge mouth 121 is diameter D, in order to protect
Demonstrate,prove into bore when lower discharge port 122 and lower nozzle 32 it is fully on, top discharge mouth 121 and top nozzle 31 are fully on when moving back brill, directly
The sum of linear distance L2 and diameter D are equal to linear distance L1.
As shown in Figure 5 and Figure 6, hollow drill 3 and Hollow Transmission Shafts 1 are axially disengaging when drill body 1 moves back brill in order to prevent, hollow
Drilling rod 3 is provided in the axial direction with waist-shaped hole 36, the radially mounted bar 124 having through waist-shaped hole 36 of lower shaft part 12, bar 124 with
It is mobile relative to 1 axial reciprocating of Hollow Transmission Shafts with hollow drill 3, i.e., anti-detachment dress is combined by bar 124 and waist-shaped hole 36
It sets.But needs guarantee, reciprocating movement distance of the bar 124 in waist-shaped hole 36 is equal to the diameter D of top discharge mouth 121, this
Sample is sized to guarantee that lower discharge port 122 and lower nozzle 32 are fully on when drill body is into when boring；When moving back brill, top discharge
Mouth 121 and top nozzle 31 are fully on.
As shown in Figure 5 and Figure 6, in order to prevent pile foundation construction when broken body enter in waist-shaped hole 36 that influence bar 124 past
The stroke moved again, bar 124 can also install the arc-shaped cover 7 close to 3 periphery wall of hollow drill, and arc-shaped cover 7 follows bar 124
Synchronizing moving, and no matter bar 124 is located at which end of waist-shaped hole 36, arc-shaped cover 7 can effectively cover waist-shaped hole 36.Certainly,
It is preferably detachably connected by fastener 72 between arc-shaped cover 7 and bar 124, such structure design, even if there is part small broken
Broken body enters waist-shaped hole 36, also can carry out cleaning and maintenance after regular dismounting arc-shaped cover 7.
As shown in Figure 5 and Figure 6, more preferably, in the axial direction of drill body 100, the both ends of arc-shaped cover 7 are designed to inclined wedge
Face 71, the i.e. both ends of arc-shaped cover 7 have the sword body formed by cammed surface 71, and such structure design can be past in arc-shaped cover 7
The broken body being attached on 3 periphery wall of hollow drill or the solidliquid mixture with viscoid are rooted out while movement again.
As shown in Fig. 2, Fig. 5 and Fig. 7, in the present embodiment, rigid outer tube 5 is axially sleeved ikn the upper axis of Hollow Transmission Shafts 1
Section 11 and top-supported power device 2, are flexibly connected, so that upper axis by sliding sleeve 8 between the bottom of rigid outer tube 5 and upper shaft part 11
Section 11 can be rotated freely relative to rigid outer tube 5.Specifically, rigid outer tube 5 is connected between power device 2 by tubular article 9, cylinder
The internal perisporium of shape object 9 offers an annular groove 91, and tubular article 9 radially opens up the radial direction of connection itself periphery wall and annular groove 91
Hole 92 has the axial hole 211 in connection 1 axis hole 13 of Hollow Transmission Shafts, and output shaft 21 through the output shaft 21 of tubular article 9
Offer the radial hole 212 of connection annular groove 91 and axial hole 211.
It is living with small radial direction between the output shaft 21 and tubular article 9 of power device 2 as shown in Fig. 2, Fig. 5 and Fig. 7
Gap is moved to guarantee that output shaft 21 can be rotated freely relative to tubular article 9, fluid (gas or cement slurry) enters in order to prevent
Lead to the freedom of movement for interfering the normal operation and Hollow Transmission Shafts 1 of power device 2 relative to rigid outer tube 5, tubular article 9 exists
The axial sides of annular groove 91 are embedded with seal 6 respectively.Seal 6 can be single or multiple, also, and each seal 6
Material, structure can be different.
As shown in Fig. 2, Fig. 5 and Fig. 7, under above structure situation, when drill body 100 into bore when, fluid (gas or cement
Slurry) successively via defeated after radial hole 92, annular groove 91, radial hole 212, axial hole 211, axle center hole 13 and lower discharge port 122
It send to lower nozzle 32 and drill body 100 is discharged；When drill body 100 moves back brill, fluid (gas or cement slurry) is successively via radial hole 92, ring
It is delivered to top nozzle 31 after shape slot 91, radial hole 212, axial hole 211, axle center hole 13 and top discharge mouth 121, drill body is discharged
100。
As shown in Fig. 2, in the present embodiment, as preferred implementations, in drill body 100 into when boring, via lower nozzle 32
The fluid that drill body 100 is discharged is cement slurry；When drill body 100 moves back brill, the fluid that drill body 100 is discharged via top nozzle 31 is gas
Body (such as compressed air).Certainly, when using drill body 100 provided by the utility model, drill body 100 into during boring or move back brill,
It is cement slurry that the fluid of drill body 100, which is discharged, via top nozzle 31 or lower nozzle 32.
<embodiment two>
In the present embodiment, identical appended drawing reference is given in the part being the same as example 1, and omits identical text and say
It is bright.
As shown in figure 8, there are also such difference structures to design for drill body 100 provided in this embodiment relative to embodiment one:
Drill body 100 provided in this embodiment further includes elastic element 4, specifically, elastic element 4 is built in profiling hole 33, and elasticity
The both ends of element 4 abut the bottom hole of profiling hole 33 and the lower end of lower shaft part 12 respectively, in order to guarantee the effective work of elastic element 4
Make, the flexible deformation amplitude of elastic element 4 is equal to or more than the diameter D of top discharge mouth 121.When drill body 100 into bore when, hollow biography
Moving axis 1, which pushes elastic element 4, makes its axial shortening, and in this case, lower discharge port 122 and lower nozzle 32 are conducted.
Relative to embodiment one, the effect of elastic element 4 is: when drill body 100 moves back brill, what elastic element 4 was born
Itself axially-extending after power is eliminated is compressed axially, and then the both ends of elastic element 4 push the bottom hole of profiling hole 33 under respectively
The lower end of shaft part 12 facilitates hollow drill 3 and axially moves down relative to hollow rotating shaft, meets top discharge mouth 121 and upper spray
The condition that mouth 31 is conducted.In the present embodiment, elastic element 4 is preferably pressure spring, certainly, drill body 100 provided by the utility model
In, elastic element 4, which can also be, has telescopic elastic ring made of elastic property material polyurethane etc..
<embodiment three>
In the present embodiment, identical appended drawing reference is given in the part being the same as example 1, and omits identical text and say
It is bright.
As shown in figure 9, there are also such difference structures to design for drill body 100 provided in this embodiment relative to embodiment one:
The upper end circumferential surface of rigid outer tube 5 opens up at least one radial passage 51, and it is radial logical that connection is opened up on the internal perisporium of rigid outer tube 5
The annular groove 52 in road 51, Hollow Transmission Shafts 1 open up the radial hole 14 in connection Pivot Point Center hole 13 and annular groove 52.
Under the design of such structure, when drill body 100 is into when boring, fluid (gas or cement slurry) successively via radial passage 51,
It is delivered to lower nozzle 32 after annular groove 52, radial hole 14, axle center hole 13 and lower discharge port 122, drill body 100 is discharged；Work as drill body
100 when moving back brill, fluid (gas or cement slurry) successively via radial passage 51, annular groove 52, radial hole 14, axle center hole 13 with
And it is delivered to top nozzle 31 after top discharge mouth 121, drill body 100 is discharged.
Relative to embodiment one, tubular article 9 is omitted in drill body 100 provided in this embodiment, enables to 100 structure of drill body
It is more compact.
<example IV>
In the present embodiment, identical appended drawing reference is given in the part being the same as example 1, and omits identical text and say
It is bright.
As shown in Figure 10, relative to embodiment one, drill body 100 provided in this embodiment is set there are also such difference structure
Meter: the upper end circumferential surface of rigid outer tube 5 opens up at least one radial passage 51, and opens up connection diameter on the internal perisporium of rigid outer tube 5
To the annular groove 52 in channel 51, output shaft 21 has the axial hole 211 in connection 1 axis hole 13 of Hollow Transmission Shafts, and exports
Axis 21 offers the radial hole 212 of connection annular groove 52 and axial hole 211.
Under the design of such structure, when drill body 100 is into when boring, fluid (gas or cement slurry) successively via radial passage 51,
The lower discharge of nozzle 32 is delivered to after annular groove 52, radial hole 212, axial hole 211, axle center hole 13 and lower discharge port 122 to bore
Body 100；When drill body 100 moves back brill, fluid (gas or cement slurry) is successively via radial passage 51, annular groove 52, radial hole
212, it is delivered to top nozzle 31 after axial hole 211, axle center hole 13 and top discharge mouth 121, drill body 100 is discharged.
Relative to embodiment one, tubular article 9 is omitted in drill body 100 provided in this embodiment, enables to 100 structure of drill body
It is more compact.
Specific embodiment is combined to describe the technical principle of the utility model above, but it should be recognized that above-mentioned
These descriptions are only for the purpose of explaining the principle of the present utility model, and cannot be construed to protect model to the utility model in any way
The concrete restriction enclosed.Based on the explanation herein, those skilled in the art can associate this reality not making the creative labor
With other novel specific embodiments or equivalent replacement, the protection scope of the utility model is fallen within.
Claims (10)
1. a kind of drill body characterized by comprising
Hollow Transmission Shafts；With
Hollow drill, axis are sleeved in the Hollow Transmission Shafts outward and rotate integrally with the Hollow Transmission Shafts；
Wherein, the Hollow Transmission Shafts are axially spaced offers top discharge mouth and lower discharge port；The hollow drill is along axial
Interval setting top nozzle and lower nozzle；
The hollow drill can be mobile relative to the Hollow Transmission Shafts axial reciprocating, when into boring, the lower discharge port and institute
Lower nozzle is stated to be conducted；When moving back brill, the top discharge mouth and the top nozzle are conducted.
2. drill body according to claim 1, which is characterized in that spacing between the top nozzle and the lower nozzle be away from
From L1, the spacing between the top discharge mouth and the lower discharge port is distance L2, and the bore of the top discharge mouth is diameter D,
And the sum of distance L2 and diameter D are equal to distance L1；
The hollow drill is provided in the axial direction with waist-shaped hole, and the Hollow Transmission Shafts are radially mounted to be had through the waist-shaped hole
Bar, reciprocating movement distance of the bar in the waist-shaped hole are equal to the diameter D.
3. drill body according to claim 1, which is characterized in that the Hollow Transmission Shafts include the upper shaft part that axially docks and
Lower shaft part；
The hollow drill axis is sleeved on the lower shaft part of the Hollow Transmission Shafts outward, and top discharge mouth and lower discharge port are spaced apart
Set on the lower shaft part of the Hollow Transmission Shafts；
The periphery wall of the lower shaft part has an at least flat face, and the hollow drill opens up matching institute along axial direction in top end surface
State the profiling hole of lower shaft part.
4. drill body according to claim 3, which is characterized in that further include: the elastic element being built in the profiling hole,
The both ends of the elastic element abut the bottom hole of profiling hole and the lower end of the lower shaft part respectively.
5. drill body according to claim 1, which is characterized in that the lower end of the hollow drill is provided with cutting portion, described
Cutting portion includes:
It is formed with the apex point of cutting edge；With
At least one circle is configured at the screw wing on the hollow drill outer peripheral surface and close to the apex point；
Wherein, the screw wing is in the cutting edge for forming sequential like on the radial end face of apex point；
Alternatively, the screw wing in close to apex point radial end face on be arranged with multiple dismountable teeth.
6. drill body according to claim 5, which is characterized in that the apex point is configured at least two spirals around central axes
Shape cutting edge, and each helical cutting edge is spaced apart around the central axes of the hollow drill.
7. drill body according to claim 1, which is characterized in that there is several arranged for interval on the periphery wall of the hollow drill
Stirring blade, and stirring blade is less than or equal to the maximum of the hollow drill around the maximum rotating diameter of hollow drill central axes
Drill diameter.
8. drill body according to claim 7, which is characterized in that every two to five stirring blades are in hollow drill
Axis arranges to form a radial stirring blade group, and each radial stirring blade group is alternatively arranged along the central axes of hollow drill；
Alternatively, each stirring blade arranges in the shape of a spiral around the periphery wall of the drilling rod.
9. drill body according to claim 7 or 8, which is characterized in that the stirring blade is relative to the transversal of hollow drill
Face is obliquely arranged.
10. drill body according to claim 3, which is characterized in that further include: drive the power of the Hollow Transmission Shafts rotation
Device；Be axially sleeved ikn the Hollow Transmission Shafts upper shaft part and top-supported described in power device rigid outer tube；It is described
The output shaft of power device is axially connect with the upper shaft part, by sliding sleeve between the bottom and the upper shaft part of the rigidity outer tube
Or bearing is flexibly connected；
The upper end circumferential surface of the rigidity outer tube opens up at least one radial passage, and connection institute is opened up on the internal perisporium of rigid outer tube
State the annular groove of radial passage；
The Hollow Transmission Shafts open up the radial hole in connection Pivot Point Center hole and the annular groove；
Alternatively, the output shaft has the axial hole in connection Hollow Transmission Shafts axis hole, and the output shaft offers
It is connected to the radial hole of the annular groove and the axial hole；
Alternatively, the rigidity outer tube is connected between the power device by tubular article, the internal perisporium of the tubular article offers one
Annular groove, tubular article radially opens up the radial hole of connection itself periphery wall and the annular groove, through the defeated of the tubular article
Shaft has an axial hole in connection Hollow Transmission Shafts axis hole, and the output shaft offer the connection annular groove and
The radial hole of the axial hole.
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| CN201821426751.XU CN209025075U (en) | 2018-08-31 | 2018-08-31 | A kind of drill body |
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| CN201821426751.XU CN209025075U (en) | 2018-08-31 | 2018-08-31 | A kind of drill body |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020042846A1 (en) * | 2018-08-31 | 2020-03-05 | 周兆弟 | Drill body |
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2018
- 2018-08-31 CN CN201821426751.XU patent/CN209025075U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020042846A1 (en) * | 2018-08-31 | 2020-03-05 | 周兆弟 | Drill body |
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