Drilling device and drilling machine convenient for pile placement

Abstract

The present invention provides a drilling device and a drilling machine for pile placement, comprising a drill bit seat, a rotary motor, a connecting rod, a sleeve and a pile head, wherein the rotary motor is arranged on the drill bit seat, one end of the connecting rod is connected to the output shaft of the rotary motor, the other end of the connecting rod is provided with a down-the-hole drill bit for drilling, the sleeve is sleeved on the connecting rod, the pile head is sleeved on the sleeve, the connecting rod, the sleeve and the pile head are all coaxial with the output shaft of the rotary motor, and the end of the sleeve away from the rotary motor is also provided with a milling cutter for expanding the hole, and the maximum distance between the milling cutter and the axis of the sleeve is greater than the radius of the outer wall of the pile head. When the device is used for pile drilling on land with sand and stones, the pile head is directly placed in the drilled hole during the drilling process, so as to prevent the sand and stone from returning to the drilled hole after the drill bit is removed during the drilling of the down-the-hole drill, and the drilling and pile placement is completed at one time, which also saves a lot of time and production costs.

Description

Technical Field

[0001] The invention relates to the technical field of drilling equipment, and in particular to a drilling device and a drilling machine which are convenient for pile placement. Background Art

[0002] With the rapid development of highway construction in my country and the improvement of construction quality standards, many previously related engineering machinery can no longer meet the development requirements of highway modernization. For example, when installing anti-collision guardrails on highways, airports, dams, ports, etc., some places still use manual operations, and some places use mechanical operations, but due to unreasonable design structures and other reasons, it is impossible to meet high standards and high efficiency requirements.

[0003] When using existing spiral drills and down-the-hole drills to drill holes and piles in some sandy and stone-containing land, after the drill bit is taken out after the drilling is completed, the sand and stone will return to the drilled hole, which is not conducive to pile driving, making the pile driving efficiency low and increasing the cost. Summary of the invention

[0004] In view of this, the problem to be solved by the present invention is to provide a drilling device that is convenient for pile placement. When the device is used for pile driving and drilling on land containing sand and stones, the pile head is directly placed in the drilled hole during the drilling process, so as to prevent the sand and stone from returning to the drilled hole after the drill bit is removed during the drilling process. The drilling and pile placement can be completed in one step, and a lot of time and production costs can be saved.

[0005] The present invention solves the above technical problems through the following technical means: The present invention provides a drilling device that is convenient for pile placement, including a drill bit seat, a rotary motor, a connecting rod, a sleeve and a pile head, the rotary motor is arranged on the drill bit seat, one end of the connecting rod is connected to the output shaft of the rotary motor, the other end of the connecting rod is provided with a down-the-hole drill bit for drilling, the sleeve is sleeved on the connecting rod, and the pile head is sleeved on the sleeve, the connecting rod, the sleeve and the pile head are all coaxial with the output shaft of the rotary motor, and a milling cutter for expanding the hole is also provided at one end of the sleeve away from the rotary motor, and the maximum distance between the milling cutter and the axis of the sleeve is greater than the radius of the outer wall of the pile head.

[0006] Furthermore, the milling cutters are provided in a plurality of pieces, and the plurality of milling cutters are arranged in an array around the outer wall of the sheath.

[0007] Furthermore, an ear seat is arranged on the outer wall of the sleeve near one end of the down-the-hole drill bit, and the milling cutter is hingedly arranged on the ear seat through a pin shaft.

[0008] Furthermore, a torsion spring is sleeved on the pin shaft, and force-bearing ends of the torsion spring in two directions are respectively fixed on the ear seat and the milling cutter. The torsion spring applies a preload force toward the axis of the sleeve to the milling cutter.

[0009] Furthermore, a through slot for the milling cutter to pass through is provided at a position of the sleeve corresponding to the milling cutter, and the milling cutter can swing around the axis of the pin shaft in the through slot.

[0010] Furthermore, an impactor is provided between the connecting rod and the down-the-hole drill bit, the impactor and the connecting rod are coaxial, and a wedge-shaped stopper is provided on the circumferential surface of the impactor close to one end of the down-the-hole drill bit for resisting the pre-tightening force of the milling cutter in the direction of the axis of the sleeve, and an inclined surface matching the wedge-shaped stopper is provided on the side of the milling cutter close to the wedge-shaped stopper, and the position of the wedge-shaped stopper is changed by moving the impactor in the direction of the axis of the impactor, thereby changing the contact position of the milling cutter with the inclined stopper so that the milling cutter can swing around the axis of the pin shaft under the action of the pre-tightening force.

[0011] Furthermore, a through hole for blowing out dust is provided on the outer wall of the sheath near one end of the rotary motor and passing through the pile head. The connecting rod and the impactor are both hollow, and the drilled dust is blown out of the through hole by blowing compressed air into the middle of the connecting rod.

[0012] Furthermore, one end of the sleeve close to the rotary motor is fixed to the connecting rod by a fastening nut, and an adjusting nut is also provided on the connecting rod, and the position of the sleeve in the axial direction of the connecting rod is adjusted by the adjusting nut.

[0013] Furthermore, a fixing sleeve is sleeved on the outer wall of the sleeve, and the fixing sleeve is fixed on the outer wall of the sleeve by bolts. The lower end surface of the fixing sleeve abuts against the upper end surface of the pile head to stabilize the pile head so that the pile head descends synchronously with the sleeve.

[0014] The present invention also provides a drilling machine, comprising the drilling device as described above for facilitating pile placement.

[0015] It can be seen from the above technical scheme that the beneficial effects of the present invention are as follows: the present invention provides a drilling device that is convenient for pile placement, including a drill bit seat, a rotary motor, a connecting rod, a sleeve, an impactor, a pile head and a down-the-hole drill bit, the rotary motor is arranged on the drill bit seat, one end of the connecting rod is connected to the output shaft of the rotary motor, the other end of the connecting rod is connected to one end of the impactor, the other end of the impactor is connected to the down-the-hole drill bit for drilling, the sleeve is sleeved on the connecting rod, the pile head is sleeved on the sleeve, the connecting rod, the sleeve, the impactor and the pile head are all coaxial with the output shaft of the rotary motor, and a milling cutter for expanding the hole is also arranged at one end of the sleeve away from the rotary motor, and the maximum distance between the milling cutter and the axis of the sleeve is greater than the radius of the outer wall of the pile head. When the device is used for pile driving and drilling on land containing sand and stones, the pile head is directly placed in the drilled hole during the drilling process, so as to prevent the sand and stone from returning to the drilled hole after the drill bit is removed during the drilling process. The drilling and pile placement are completed at one time, which also saves a lot of time and production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0017] Figure 1 A structural diagram of the drilling device for pile placement provided by the present invention during drilling;

[0018] Figure 2 for Figure 1 A partial enlarged view of position A of the drilling device for pile placement shown;

[0019] Figure 3 A schematic diagram of a drilling device for facilitating pile placement provided by the present invention when the milling cutter is retracted;

[0020] Figure 4 for Figure 3 A partial enlarged view of the B position of the drilling device for pile placement shown;

[0021] Figure 5 A partial structural diagram of the position of the wedge-shaped stopper of the impactor of the drilling device for facilitating pile placement provided by the present invention;

[0022] Figure 6 A partial structural diagram of the installation position of the milling cutter of the sheath of the drilling device for facilitating pile placement provided by the present invention;

[0023] Figure 7 A partial structural diagram of the installation position of the torsion spring of the drilling device for facilitating pile placement provided by the present invention;

[0024] Figure 8 A schematic diagram of a drilling machine provided by the present invention;

[0025] Fig. 9 for Figure 1 A partial cross-sectional view of the C position of the drilling device for facilitating pile placement is shown.

[0026] Reference numerals:

[0027] 1-drill seat; 2-rotating motor; 3-connecting rod; 4-sheath; 5-impactor; 6-pile head; 7-down-the-hole drill bit; 8-milling cutter; 9-drilling machine; 41-ear seat; 42-pin shaft; 43-torsion spring; 44-through groove; 45-through hole; 46-fastening nut; 47-adjusting nut; 51-wedge block; 61-fixing sleeve; 21-moving cylinder; 81-step. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0032] See also Figures 1 to 8The present invention provides a drilling device that is convenient for pile placement, including a drill bit seat 1, a rotary motor 2, a connecting rod 3, a sleeve 4 and a pile head 6, wherein the rotary motor 2 is arranged on the drill bit seat 1, one end of the connecting rod 3 is connected to the output shaft of the rotary motor 2, and the other end of the connecting rod 3 is provided with a down-the-hole drill bit 7 for drilling, the sleeve 4 is sleeved on the connecting rod 3, and the pile head 6 is sleeved on the sleeve 4, the connecting rod 3, the sleeve 4, and the pile head 6 are all coaxial with the output shaft of the rotary motor 2, and the end of the sleeve 4 away from the rotary motor 2 is also provided with a milling cutter 8 for expanding the hole, and the maximum distance between the milling cutter 8 and the axis of the sleeve 4 is greater than the radius of the outer wall of the pile head 6. When drilling, the first step of drilling is performed by using the down-the-hole drill bit 7 and the impactor 5, and then the hole is expanded by the milling cutter 8, so that the hole expanded by the milling cutter 8 is slightly larger than the outer wall diameter of the pile head 6; after the drilling is completed, the milling cutter 8 is retracted and the milling cutter 8 is put into the inner hole of the pile head 6, and then the down-the-hole drill bit 7 and the sleeve 4 are taken out, and the pile head 6 is left in the drilled hole, so that the drilling and piling are completed in sequence. When the device is used for piling and drilling on land with sand and stones, the pile head 6 is directly placed in the drilled hole during the drilling process, so as to prevent the sand and stone from returning to the drilled hole after the drill bit is removed during the drilling of the down-the-hole drill. The drilling and piling are completed at one time, and a lot of time and production costs are saved.

[0033] As a further improvement to the above technical solution, the milling cutter 8 has multiple pieces, and the multiple milling cutters 8 are arranged in an array around the outer wall of the jacket 4. Multiple milling cutters 8 are arranged in an array at equal angles around the outer wall of the jacket 4, making it easier and more stable to expand the hole, expand the hole more evenly, and reduce the wear of the milling cutter 8. Preferably, three milling cutters 8 are provided, and the milling cutters 8 can be set according to the geological conditions of the drilling area. When the geology is harder, more milling cutters 8 can be set to facilitate hole expansion.

[0034] As a further improvement to the above technical solution, an ear seat 41 is provided on the outer wall of the sleeve 4 near one end of the down-the-hole drill bit 7, and the milling cutter 8 is hingedly arranged on the ear seat 41 through a pin 42. The axis of the pin 42 is perpendicular to the axis of the sleeve 4, and the milling cutter 8 is hingedly arranged on the ear seat 41 through the pin 42 to facilitate the rotation of the milling cutter 8 around the axis of the pin 42, thereby changing the distance between the milling cutter 8 and the axis of the sleeve 4 to shrink and expand the milling cutter 8. When drilling, the milling cutter 8 is expanded, and the milling cutter 8 abuts against the inner wall of the pile head 6 and is expanded to the position. At this time, the blade of the milling cutter 8 slightly exceeds the outer wall of the pile head 6, so that the hole milled by the milling cutter 8 in the process of following the rotation of the sleeve 4 is slightly larger than the outer wall diameter of the pile head 6, which is convenient for the pile head 6 to be inserted into the hole. When drilling to the designed depth, the milling cutter 8 is rotated to shrink the sheet into the pile head 6, and then the down-the-hole drill bit 7 and the sleeve 4 are taken out.

[0035] As a further improvement to the above technical solution, a torsion spring 43 is also sleeved on the pin 42, and the force-bearing ends of the torsion spring 43 in two directions are respectively fixed on the ear seat 41 and the slice milling cutter 8, and the torsion spring 43 applies a pre-tightening force to the slice milling cutter 8 in the direction of the axis of the sleeve 4. The sleeve 4 is provided with a through slot 44 for the slice milling cutter 8 to pass through at a position corresponding to the slice milling cutter 8, and the slice milling cutter 8 can swing in the through slot 44 around the axis of the pin 42. And the thickness of the through slot 44 is slightly larger than the thickness of the slice milling cutter 8, so that during the milling process of the slice milling cutter 8, the side wall of the through slot 44 can abut against the slice milling cutter 8, thereby increasing the rigidity of the slice milling cutter 8 and preventing the slice milling cutter 8 from being deformed and damaged. A torsion spring 43 is set and the pin shaft 42 passes through the center hole of the torsion spring 43. After a pre-tightening force is applied to the torsion spring 43, the two ends of the torsion spring 43 are respectively fixed on the ear seat 41 and the milling cutter 8, so that the torsion spring 43 gives the milling cutter 8 a pre-tightening force toward the axis of the sleeve 4, which is convenient for retracting the milling cutter 8 into the through groove 44 after the drilling is completed, and the maximum dimension of the milling cutter 8 from the axis of the sleeve 4 is larger than the inner wall diameter of the pile head 6, so that the milling cutter 8 is easy to remove.

[0036] As a further improvement of the above technical solution, an impactor 5 is also arranged between the connecting rod 3 and the down-the-hole drill bit 7. The impactor 5 and the connecting rod 3 are coaxial. A wedge-shaped stopper 51 for resisting the pre-tightening force of the milling cutter 8 in the direction of the axis of the sleeve 4 is also arranged on the circumferential surface of the impactor 5 close to the down-the-hole drill bit 7. The milling cutter 8 is provided with an inclined surface matching the wedge-shaped stopper 51 on one side close to the wedge-shaped stopper 51. By moving the impactor 5 in the axial direction of the impactor 5, the position of the wedge-shaped stopper 51 is changed, thereby changing the contact position of the milling cutter 8 with the inclined stopper so that the milling cutter 8 can swing around the axis of the pin 42 under the action of the pre-tightening force. The inclined surface of the wedge-shaped stopper 51 is inclined from the lower end of the impactor 5 to the upper end, that is, the diameter becomes smaller. When the milling cutter 8 is in working state, the impactor 5 is moved to an appropriate position and the sleeve 4 is fixed on the connecting rod 3. At this time, the inclined surface on the milling cutter 8 is tangent to the wedge-shaped stopper 51, thereby preventing the milling cutter 8 from shrinking, so that the hole milled by the milling cutter 8 is larger than the outer wall diameter of the pile head 6; after the drilling is completed, the diameter of the position where the milling cutter 8 contacts the wedge-shaped stopper 51 becomes smaller and smaller during the downward movement of the impactor 5, so that the milling cutter 8 shrinks to the inner wall of the pile head 6 under the action of the preload force. Finally, the down-the-hole drill bit 7, the sleeve 4 and the milling cutter 8 are taken out from the inner hole of the pile head 6, and the pile head 6 is left in the drilled hole to complete the drilling and pile setting.

[0037] As a further improvement to the above technical solution, a through hole 45 for blowing out dust is further provided on the outer wall of the sheath 4 near one end of the rotary motor 2 and passing through the pile head 6. The connecting rod 3 and the impactor 5 are both hollow, and the drilled dust is blown out of the through hole 45 by blowing compressed air into the middle of the connecting rod 3. The compressed air is blown out of the through hole 45 by the air compressor to blow high compressed air from the middle of the connecting rod 3.

[0038] As a further improvement to the above technical solution, Fig. 9 As shown, the end of the sleeve 4 close to the rotary motor 2 is fixed to the connecting rod 3 by a fastening nut, a thread is set on the outer wall of the sleeve, the fastening nut is screwed onto the sleeve and abuts against the adjusting nut, so as to fasten the sleeve to the connecting rod, and the connecting rod 3 is also provided with an adjusting nut, a thread is set on the connecting rod, the adjusting nut is screwed on the connecting rod, and the position of the sleeve 4 in the axial direction of the connecting rod 3 is adjusted by the adjusting nut. When drilling, the sleeve 4 is fixed to the connecting rod 3 by the fastening nut, so that the sleeve 4 and the connecting rod 3 rotate synchronously, and the position of the sleeve 4 on the connecting rod 3 is adjusted by the adjusting nut, so that the milling cutter 8 is fixed in a suitable position. After the drilling is completed, the fastening nut and the adjusting nut are loosened, and the connecting rod 3 and the impactor 5 are continuously moved downward, so that the milling cutter 8 is completely retracted to within the diameter of the inner wall of the pile head 6, and then the sleeve 4 is fixed to the joint, and the sleeve 4 is taken out together, and the pile head 6 is left in the drilled hole. Preferably, the rotary motor is slidably mounted on the drill seat so that the rotary motor can move along the axial direction of the output shaft of the rotary motor. At the same time, a group of mobile cylinders are provided to drive the rotary motor to move. The cylinder end of the mobile cylinder is fixedly provided on the drill seat, and the piston end is fixedly provided on the rotary motor. At the same time, the extension length of the mobile cylinder is provided so that when drilling, the mobile cylinder is in a fully retracted state, at which time the milling cutter is extended into place, and at this time the inclined surface on the milling cutter 8 is tangent to the wedge-shaped stopper 51. When the drilling is completed, the mobile cylinder is extended so that the rotary motor drives the impactor to move downward, thereby retracting the milling cutter. When the mobile cylinder is fully extended, the milling cutter is fully retracted into the pile head. The mobile cylinder is provided so that when the milling cutter needs to be retracted, the mobile cylinder can be fully extended, which makes it easier to control the moving distance of the impactor, and the retraction operation of the milling cutter is simpler and more convenient.

[0039] As a further improvement to the above technical solution, a fixing sleeve is also sleeved on the outer wall of the sleeve, and the fixing sleeve is fixed on the outer wall of the sleeve by bolts, and the lower end face of the fixing sleeve abuts against the upper end face of the pile head to stabilize the pile head, so that the pile head can be synchronously lowered with the sleeve. When drilling, the pile head 6 is fixed to the sleeve 4 by the fixing sleeve so that the pile head 6 can be synchronously lowered into the drilled hole with the sleeve 4. Preferably, a step 81 can also be provided on one side of the milling cutter close to the pile head, so that when the milling cutter is born, the lower end face of the pile head abuts against the step to prevent the pile head from falling.

[0040] The present invention also provides a drilling machine, including the drilling device for pile placement as described above. The drilling machine 9 including the drilling device for pile placement is used to drill holes, and the pile head 6 is directly placed in the drilled hole during the drilling process, so that sand and stone are prevented from returning to the drilled hole after the drill bit is removed during the drilling process. The drilling and pile placement is completed at one time, and a lot of time and production costs are saved.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A drilling device for pile placement, characterized in that: The invention comprises a drill bit seat (1), a rotary motor (2), a connecting rod (3), a sleeve (4) and a pile head (6), wherein the rotary motor (2) is arranged on the drill bit seat (1), one end of the connecting rod (3) is connected to the output shaft of the rotary motor (2), the other end of the connecting rod (3) is provided with a down-the-hole drill bit (7) for drilling holes, the sleeve (4) is sleeved on the connecting rod (3), the pile head (6) is sleeved on the sleeve (4), the connecting rod (3), the sleeve (4) and the pile head (6) are all coaxial with the output shaft of the rotary motor (2), and the sleeve (4) is also provided with a useful A milling cutter (8) for expanding a hole, wherein the maximum distance between the milling cutter (8) and the axis of a sleeve (4) is greater than the radius of the outer wall of a pile head (6), an ear seat (41) is arranged on the outer wall of one end of the sleeve (4) close to a down-the-hole drill bit (7), the milling cutter (8) is hingedly arranged on the ear seat (41) through a pin shaft (42), a torsion spring (43) is also sleeved on the pin shaft (42), the force-bearing ends of the torsion spring (43) in two directions are respectively fixed on the ear seat (41) and the milling cutter (8), and the torsion spring (43) applies a preload force to the milling cutter (8) in a direction toward the axis of the sleeve (4). An impactor (5) is also provided between the connecting rod (3) and the down-the-hole drill bit (7), the impactor (5) and the connecting rod (3) being coaxial, a wedge-shaped stopper (51) for resisting the pre-tightening force of the milling cutter (8) in the direction of the axis of the sleeve (4) is also provided on the circumferential surface of the impactor (5) close to one end of the down-the-hole drill bit (7), and a fixing sleeve (61) is also sleeved on the outer wall of the sleeve (4), the fixing sleeve (61) is fixed to the outer wall of the sleeve (4) by bolts, and the lower end surface of the fixing sleeve (61) abuts against the upper end surface of the pile head (6) to stabilize the pile head (6), so that the pile head (6) ) is synchronously lowered with the sleeve (4), and the rotary motor (2) is slidably mounted on the drill bit seat (1), so that the rotary motor (2) can move along the axial direction of the output shaft of the rotary motor (2), and a group of mobile cylinders are arranged to drive the rotary motor (2) to move, the cylinder end of the mobile cylinder is fixedly arranged on the drill bit seat (1), and the piston end is fixedly arranged on the rotary motor (2), and the extension length of the mobile cylinder is arranged so that when drilling, the mobile cylinder is in a fully retracted state, at which time the milling cutter (8) is extended into place, and at this time the inclined surface on the milling cutter (8) is tangent to the wedge-shaped stopper (51).

2. The drilling device for facilitating pile placement according to claim 1, characterized in that: The milling cutters (8) are provided in a plurality of pieces, and the milling cutters (8) are arranged in an array around the outer wall of the sheath (4).

3. The drilling device for facilitating pile placement according to claim 1, characterized in that: A through slot (44) for the milling cutter (8) to pass through is provided at positions corresponding to the sleeve (4) and the milling cutter (8); the milling cutter (8) can swing around the axis of the pin shaft (42) in the through slot (44).

4. The drilling device for facilitating pile placement according to claim 3, characterized in that: The milling cutter (8) is provided with an inclined surface matching the wedge-shaped stopper (51) on one side thereof close to the wedge-shaped stopper (51). The position of the wedge-shaped stopper (51) is changed by moving the impactor (5) in the axial direction of the impactor (5), thereby changing the contact position between the milling cutter (8) and the inclined stopper, so that the milling cutter (8) can swing around the axis of the pin shaft (42) under the action of the preload force.

5. The drilling device for facilitating pile placement according to claim 4, characterized in that: A through hole (45) for blowing out dust is also provided on the outer wall of the sheath (4) near one end of the rotary motor (2) and passing through the pile head (6). The connecting rod (3) and the impactor (5) are both hollow. The drilled dust is blown out from the through hole (45) by blowing compressed air into the middle of the connecting rod (3).

6. The drilling device for facilitating pile placement according to claim 1, characterized in that: The end of the sleeve (4) close to the rotary motor (2) is fixed to the connecting rod (3) by a fastening nut. The connecting rod (3) is also provided with an adjusting nut, and the position of the sleeve (4) in the axial direction of the connecting rod (3) is adjusted by the adjusting nut.

7. A drilling machine, characterized in that: The invention comprises a drilling device for facilitating pile placement as claimed in any one of claims 1 to 6.

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