CN215057133U

CN215057133U - Expanding bit for salvaging drilling tool

Info

Publication number: CN215057133U
Application number: CN202121287487.8U
Authority: CN
Inventors: 范撑旗
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2021-12-07
Anticipated expiration: 2031-06-09

Abstract

The utility model discloses a reaming drill bit of usefulness is salvaged to drilling tool, including the drill bit connecting axle, the bottom fixed mounting of drill bit connecting axle has annular sliding installation subassembly, and the drill bit connecting axle installs the annular connecting block through annular sliding installation subassembly, and the bottom bonding of annular connecting block is fixed with the annular guard plate, seted up a circular movable cavity on the drill bit connecting axle, circular movable cavity's bottom inner wall central point puts and has seted up a circular installation and perforate, and fixed the inlaying is equipped with two rotating electrical machines on the top inner wall of circular movable cavity, and rotating electrical machines's output shaft bottom welded fastening has the screw rod. This reamer bit simple structure can carry out the reaming operation by high efficiency on required drilling face, and the phenomenon that splashes appears in the piece of effectively having avoided the drilling to produce in addition the setting of annular guard plate.

Description

Expanding bit for salvaging drilling tool

Technical Field

The utility model relates to a reamer bit technical field especially relates to a reamer bit of usefulness is salvaged to drilling tool.

Background

Due to the unpredictability of the geological structure of the coal bed, the soft coal bed has outburst danger, the cracks of the coal bed are developed in a large number, and the gas is large in storage amount, the hole spraying phenomenon is often accompanied in the construction process of gas extraction and drilling in the coal bed, the hole spraying phenomenon is generally expressed as that high gas flows to a hole opening to be sprayed out, pressure-bearing gas carries a large amount of coal powder and water to directly flush out of the hole opening, the hole opening is often accompanied by coal shot sound and airflow impact sound, the expression form is a pulse form, the phenomena of gas overrun, hole spraying, hole collapse, hole blocking and drill blocking are caused, and finally, a compression bar accident is caused; need use the drill bit when handling the depression bar accident, but current drill bit has the operation process complicacy in the reaming process, leads to its work efficiency to hang down, also can appear the phenomenon that the piece splashes when drilling in addition, thereby has provided the reaming drill bit of usefulness to this two problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a reamer bit for salvaging a drilling tool.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a reaming bit for salvaging drilling tools comprises a bit connecting shaft, wherein an annular sliding installation assembly is fixedly installed at the bottom of the bit connecting shaft, an annular connecting block is installed on the bit connecting shaft through the annular sliding installation assembly, an annular protection plate is fixedly bonded at the bottom of the annular connecting block, a circular movable cavity is formed in the bit connecting shaft, a circular installation perforation is formed in the central position of the inner wall of the bottom of the circular movable cavity, two rotating motors are fixedly embedded in the inner wall of the top of the circular movable cavity, screw rods are fixedly welded at the bottom ends of output shafts of the rotating motors, the bottom ends of the screw rods are rotatably installed on the inner wall of the bottom of the circular movable cavity, the outer side threads of the two screw rods are sleeved with a same circular sliding block, the outer side of the circular sliding block is in sliding contact with the inner side wall of the circular movable cavity, and a fixed base is welded at the bottom of the circular sliding block, the fixed range sensor that inlays on circular movable cavity top inner wall that is equipped with in bottom central point of fixing base position, the output shaft bottom welded fastening of flexible motor has the extrusion platform, four sides of extrusion platform all set up to the inclined plane, and four sides of extrusion platform all install an extrusion subassembly, every inclined plane of extrusion platform carries out slidable mounting through the extrusion subassembly that corresponds has a horizontal connecting plate, one side that the extrusion platform was kept away from to every horizontal connecting plate has all welded an arc and bores the piece, the top slidable mounting that the arc bored the piece is on the fixing base, the equidistant tooth that bores in bottom that is provided with a plurality of bottoms of arc, circular slider has a fixed range sensor who inlays the dress directly over on circular movable cavity top inner wall.

Preferably, the annular sliding installation assembly comprises an annular guide rail welded and fixed at the bottom of the drill connecting shaft and an annular guide rail groove formed in the top of the annular connecting block, the annular guide rail groove and the annular guide rail are installed in a sliding mode, and the top of the annular connecting block is in contact with the bottom of the drill connecting shaft.

Preferably, the bottom of the annular protection plate is fixedly bonded with an anti-slip rubber gasket, and the diameter of the inside of the top of the annular protection plate is smaller than the diameter of the inside of the bottom of the annular protection plate.

Preferably, two rotating motor placing grooves used for fixedly mounting the rotating motor are formed in the inner wall of the top of the circular movable cavity, the same annular buffer rubber pad is arranged between the two rotating motor placing grooves, the top of the annular buffer rubber pad is fixedly bonded to the inner wall of the top of the circular movable cavity, a sensor mounting groove formed in the inner wall of the top of the circular movable cavity is formed in the upper portion of the inner side of the annular buffer rubber pad, and the inner side wall of the sensor mounting groove is fixedly bonded to the outer side of the distance measuring sensor.

Preferably, two screw rotating grooves are formed in the inner wall of the bottom of the circular movable cavity, bearings are fixedly bonded inside the screw rotating grooves, the inner sides of the inner rings of the bearings are fixedly bonded outside the corresponding screws, and two thread mounting through holes which are in thread mounting with the outer sides of the corresponding screws are further formed in the top of the circular sliding block.

Preferably, a telescopic motor placing groove for fixedly mounting the telescopic motor is formed in the center of the bottom of the fixing seat.

Preferably, the extrusion subassembly includes that one sets up the rectangular rail mounting groove in the extrusion platform corresponds one side, welded fastening has the rectangular rail on its open-ended one side inner wall is kept away from to the rectangular rail mounting groove, the top welded fastening of rectangular rail is on the top inner wall of rectangular rail mounting groove, and the bottom welded fastening of rectangular rail is on the bottom inner wall of rectangular rail mounting groove, horizontal connecting plate keeps away from the one end of arc piece and has seted up a top and all set up to open-ended rectangular rail groove with the bottom, and the one end that the arc piece was kept away from to horizontal connecting plate passes through rectangular rail groove slidable mounting on the rectangular rail.

Preferably, the top and the bottom of the extrusion table are both provided with a square structure, and the size of the top of the extrusion table is larger than that of the bottom of the extrusion table.

Preferably, all be equipped with a rectangle movable groove of seting up in the fixing base bottom directly over every arc drill piece, the inside welding of rectangle movable groove has the circular guide bar that a level set up, the outside slidable mounting of circular guide bar has one with the inside lateral wall sliding contact's of rectangle movable groove rectangle slider, the bottom welded fastening of rectangle slider is at the arc drill piece top that corresponds, one side that flexible motor was kept away from to the rectangle slider and the rectangle movable groove welded fastening have same spring on keeping away from one side inner wall of flexible motor, spring sliding suit is in the circular guide bar outside that corresponds, wherein set up one on the rectangle slider with circular guide bar outside sliding contact's circular direction through-hole, one side that extrusion platform was kept away from to every arc drill piece is from last to being provided with the side tooth that a plurality of slopes set up to equidistant in proper order down.

Preferably, the fixed dress that inlays in front side of drill bit connecting axle is equipped with one and is used for carrying out the battery that supplies power for rotating electrical machines, flexible motor and range finding sensor, and range finding sensor has a audio amplifier that is used for reporting range finding sensor detection distance through wireless connection, and two rotating electrical machines and flexible motor are equipped with same outside remote controller through wireless matching.

This reamer bit simple structure can carry out the reaming operation by high efficiency on required drilling face, and the phenomenon that splashes appears in the piece of effectively having avoided the drilling to produce in addition the setting of annular guard plate.

Drawings

Fig. 1 is a schematic front view of a reamer bit for salvaging a drilling tool according to the present invention;

fig. 2 is a schematic sectional view of a reamer bit for salvaging a drilling tool according to the present invention;

fig. 3 is an enlarged schematic view of a-a in fig. 2.

In the figure: 1 drill bit connecting shaft, 2 annular connecting blocks, 3 annular protective plates, 4 circular movable chambers, 5 rotary motor placing grooves, 6 rotary motors, 7 screw rods, 8 circular sliding blocks, 9 fixed seats, 10 telescopic motor placing grooves, 11 telescopic motors, 12 arc-shaped drill bits, 13 annular buffer rubber pads, 14 distance measuring sensors, 15 anti-skidding rubber bottom washers, 16 rectangular sliding blocks, 17 rectangular movable grooves, 18 circular guide rods, 19 extrusion tables, 20 rectangular guide rail mounting grooves, 21 rectangular guide rail mounting grooves,

22 circular guide rail grooves, 23 horizontal connecting plates, 24 circular guide rails and 25 springs.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, a reaming bit for salvaging a drilling tool comprises a bit connecting shaft 1, wherein the bottom of the bit connecting shaft 1 is fixedly provided with an annular sliding installation component, the bit connecting shaft 1 is provided with an annular connecting block 2 through the annular sliding installation component, the annular sliding installation component comprises an annular guide rail 24 welded and fixed at the bottom of the bit connecting shaft 1 and an annular guide rail groove 22 arranged at the top of the annular connecting block 2, the annular guide rail groove 22 is slidably arranged with the annular guide rail 24, the top of the annular connecting block 2 is contacted with the bottom of the bit connecting shaft 1, the bottom of the annular connecting block 2 is fixedly bonded with an annular protection plate 3, the bottom of the annular protection plate 3 is fixedly bonded with an anti-slip rubber gasket 15, the inside diameter at the top of the annular protection plate 3 is smaller than the inside diameter at the bottom of the annular protection plate 3, the bit connecting shaft 1 is provided with a circular movable chamber 4, a circular mounting through hole is arranged at the central position of the inner wall of the bottom of the circular movable chamber 4, two rotating motors 6 are fixedly embedded on the inner wall of the top of the circular movable chamber 4, screw rods 7 are fixedly welded at the bottom ends of output shafts of the rotating motors 6, the bottom ends of the screw rods 7 are rotatably mounted on the inner wall of the bottom of the circular movable chamber 4, the outer side threads of the two screw rods 7 are sleeved with a same circular slider 8, the outer side of the circular slider 8 is in sliding contact with the inner side wall of the circular movable chamber 4, a fixed seat 9 is fixedly welded at the bottom of the circular slider 8, a telescopic motor 11 is fixedly embedded at the central position of the bottom of the fixed seat 9, a telescopic motor placing groove 10 for fixedly mounting the telescopic motor 11 is arranged at the central position of the bottom of the fixed seat 9, a squeezing table 19 is fixedly welded at the bottom end of the output shaft of the telescopic motor 11, and four sides of the squeezing table 19 are all arranged as inclined planes, wherein the top and the bottom of extrusion platform 19 all set up to square structure, and the top size of extrusion platform 19 is bigger than the bottom size of extrusion platform 19, an extrusion subassembly is all installed to four sides of extrusion platform 19, every inclined plane of extrusion platform 19 carries out slidable mounting through the extrusion subassembly that corresponds has a horizontal connecting plate 23, wherein the extrusion subassembly includes a rectangle guide rail mounting groove 20 of seting up in one side that extrusion platform 19 corresponds, rectangle guide rail mounting groove 20 keeps away from its open-ended one side inner wall on welded fastening have rectangle guide rail 21, the top welded fastening of rectangle guide rail 21 is on the top inner wall of rectangle guide rail mounting groove 20, and the bottom welded fastening of rectangle guide rail 21 is on the bottom inner wall of rectangle guide rail mounting groove 20, horizontal connecting plate 23 keeps away from the one end of arc piece 12 and has seted up a top and bottom and all set up to open-ended rectangle guide rail groove, and the one end that horizontal connecting plate 23 kept away from arc piece 12 is through rectangle guide rail groove slidable mounting on rectangle guide rail 21 An arc-shaped drill bit 12 is welded on one side of each horizontal connecting plate 23 far away from the extrusion table 19, the top of the arc-shaped drill bit 12 is slidably mounted on the fixed seat 9, a plurality of bottom drill teeth are arranged at equal intervals at the bottom of each arc-shaped drill bit 12, a rectangular movable groove 17 arranged at the bottom of the fixed seat 9 is arranged right above each arc-shaped drill bit 12, a horizontally-arranged circular guide rod 18 is welded inside the rectangular movable groove 17, a rectangular sliding block 16 in sliding contact with the inner side wall of the rectangular movable groove 17 is slidably mounted on the outer side of the circular guide rod 18, the bottom of the rectangular sliding block 16 is fixedly welded on the top of the corresponding arc-shaped drill bit 12, the same spring 25 is fixedly welded on one side of the rectangular sliding block 16 far away from the telescopic motor 11 and the inner wall of the rectangular movable groove 17 far away from the telescopic motor 11, and the spring 25 is slidably mounted on the outer side of the corresponding circular guide rod 18, a circular guide through hole in sliding contact with the outer side of the circular guide rod 18 is formed in the rectangular sliding block 16, a plurality of obliquely arranged side teeth are sequentially arranged on one side, away from the extrusion table 19, of each arc-shaped drill bit 12 at equal intervals from top to bottom, and a distance measuring sensor 14 fixedly embedded on the inner wall of the top of the circular movable chamber 4 is matched right above the circular sliding block 8;

fixed the inlaying in front side of drill bit connecting axle 1 is equipped with one and is used for rotating electrical machines 6, flexible motor 11 and distance measuring sensor 14 carry out the battery of supplying power, distance measuring sensor 14 has a audio amplifier that is used for reporting distance measuring sensor 14 detection distance through wireless connection, two rotating electrical machines 6 and flexible motor 11 have same outside remote controller through wireless matching, this reamer bit simple structure, can high efficiency carry out the reaming operation on required drilling face, annular guard plate 3's setting in addition, the phenomenon that splashes appears in the piece of effectively having avoided drilling to produce.

In the utility model, two rotating motor placing grooves 5 for fixedly installing the rotating motor 6 are arranged on the inner wall of the top part of the circular movable cavity 4, the same annular buffer rubber pad 13 is arranged between the two rotating motor placing grooves 5, the top part of the annular buffer rubber pad 13 is adhered and fixed on the inner wall of the top part of the circular movable cavity 4, a sensor mounting groove arranged on the inner wall of the top part of the circular movable cavity 4 is arranged above the inner side of the annular buffer rubber pad 13, the inner side wall of the sensor mounting groove is adhered and fixed with the outer side of the distance measuring sensor 14, two screw rod rotating grooves are arranged on the inner wall of the bottom part of the circular movable cavity 4, bearings are adhered and fixed inside the screw rod rotating grooves, the inner sides of the inner rings of the bearings are adhered and fixed on the outer sides of the corresponding screw rods 7, two thread installing through holes which are installed with the outer side threads of the corresponding screw rods 7 are also arranged on the top part of the circular slide block 8, this reamer bit simple structure can carry out the reaming operation by high efficiency on required drilling face, and the phenomenon that splashes appears in the piece of effectively having avoided drilling to produce in addition annular guard plate 3's setting.

The working principle is as follows: when a worker needs to perform hole expanding, the drill connecting shaft 1 is moved downwards, at the same time, the four arc-shaped drill pieces 12 all slide downwards along with the drill connecting shaft until the bottom of the anti-skid rubber bottom gasket 15 is contacted with a surface to be drilled, at the same time, the drill connecting shaft 1 is driven to be in a rotating state by the corresponding driving device, the drill connecting shaft 1 drives the circular guide rail 24 to slide in the circular guide rail groove 22, when the drill connecting shaft 1 is in the rotating state, the two rotating motors 6 are also in a starting state, the two rotating motors 6 respectively drive the circular sliding block 8 to slide downwards on the inner side wall of the circular movable chamber 4 through the corresponding screw rods 7, the circular sliding block 8 drives the fixed seat 9 to move downwards, the fixed seat 9 drives the arc-shaped drill pieces 12 to move downwards through the matching of the circular guide rod 18 and the rectangular sliding block 16, the arc-shaped drill bit 12 is enabled to be in a rotating state in the downward moving process, the four arc-shaped drill bits 12 which are in the rotating state and move downward are drilled on a required drilling surface through bottom drilling teeth, at the moment, the distance measuring sensor 14 monitors the moving distance of the circular slider 8 in real time and broadcasts the moving distance through a sound box, when the drilling depth of the four arc-shaped drill bits 12 reaches the required drilling depth, a user pauses the two rotating motors 6 through an external remote controller and starts the telescopic motor 11, the telescopic motor 11 drives the extrusion table 19 to move downwards through an output shaft of the telescopic motor, four sides of the extrusion table 19 respectively drive the corresponding horizontal connecting plates 23 to move horizontally through the corresponding rectangular guide rails 21, so that the horizontal connecting plates 23 move in the direction far away from the extrusion table 19, and the horizontal connecting plates 23 drive the arc-shaped drill bits 12 to move in the direction far away from the extrusion table 19, four arc drill bits 12 still are in the rotation state under the drive of drill bit connecting axle 1 this moment, and four arc drill bits 12 carry out the reaming operation to the inside lateral wall of having bored the hole through the side drill tooth that corresponds, and this reamer bit simple structure can carry out the reaming operation on required drilling face by last knowing, and the phenomenon that splashes appears in the piece of effectively having avoided drilling to produce in addition annular guard plate 3's setting.

In the description of the present application, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, a connection through an intermediate medium, and a connection between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A reaming drill bit for salvaging a drilling tool comprises a drill bit connecting shaft (1) and is characterized in that an annular sliding installation assembly is fixedly installed at the bottom of the drill bit connecting shaft (1), an annular connecting block (2) is installed on the drill bit connecting shaft (1) through the annular sliding installation assembly, an annular protection plate (3) is fixedly bonded to the bottom of the annular connecting block (2), a circular movable cavity (4) is formed in the drill bit connecting shaft (1), a circular installation perforation is formed in the central position of the inner wall of the bottom of the circular movable cavity (4), two rotating motors (6) are fixedly embedded in the inner wall of the top of the circular movable cavity (4), a screw rod (7) is fixedly welded to the bottom end of an output shaft of each rotating motor (6), the bottom end of each screw rod (7) is rotatably installed on the inner wall of the bottom of the circular movable cavity (4), and the same circular sliding block (8) is sleeved on the outer threads of the two screw rods (7), the outer side of the circular sliding block (8) is in sliding contact with the inner side wall of the circular movable cavity (4), a fixed seat (9) is welded and fixed at the bottom of the circular sliding block (8), a telescopic motor (11) is fixedly embedded at the central position of the bottom of the fixed seat (9), an extrusion table (19) is welded and fixed at the bottom end of an output shaft of the telescopic motor (11), inclined surfaces are arranged on four sides of the extrusion table (19), an extrusion assembly is arranged on four sides of the extrusion table (19), a horizontal connecting plate (23) is slidably mounted on each inclined surface of the extrusion table (19) through the corresponding extrusion assembly, an arc-shaped drill bit (12) is welded on one side, away from the extrusion table (19), of each horizontal connecting plate (23), the top of each arc-shaped drill bit (12) is slidably mounted on the fixed seat (9), a plurality of bottom drill teeth are arranged at equal intervals at the bottom of each arc-shaped drill bit (12), a distance measuring sensor (14) fixedly embedded on the inner wall of the top of the circular movable chamber (4) is matched right above the circular sliding block (8).

2. A reamer bit for salvaging drilling tools as claimed in claim 1, wherein the annular sliding installation component comprises an annular guide rail (24) welded and fixed at the bottom of the bit connecting shaft (1) and an annular guide rail groove (22) arranged at the top of the annular connecting block (2), and the annular guide rail groove (22) is slidably installed with the annular guide rail (24), and the top of the annular connecting block (2) is in contact with the bottom of the bit connecting shaft (1).

3. A reamer bit for salvaging drilling tools as claimed in claim 1, wherein the bottom of the ring-shaped protection plate (3) is adhesively fixed with an anti-slip rubber washer (15), and the inner diameter of the top of the ring-shaped protection plate (3) is smaller than the inner diameter of the bottom of the ring-shaped protection plate (3).

4. The reaming drill bit for salvaging drilling tools as claimed in claim 1, wherein two rotating motor placing grooves (5) for fixedly mounting the rotating motor (6) are formed in the inner wall of the top of the circular movable chamber (4), the same annular buffer rubber pad (13) is arranged between the two rotating motor placing grooves (5), the top of the annular buffer rubber pad (13) is fixedly bonded to the inner wall of the top of the circular movable chamber (4), a sensor mounting groove formed in the inner wall of the top of the circular movable chamber (4) is formed in the upper portion of the inner side of the annular buffer rubber pad (13), and the inner side wall of the sensor mounting groove is fixedly bonded to the outer side of the distance measuring sensor (14).

5. The reaming drill bit for salvaging drilling tools as claimed in claim 1, wherein the inner wall of the bottom of the circular movable chamber (4) is provided with two screw rotating grooves, the inside of each screw rotating groove is fixedly bonded with a bearing, the inner side of the inner ring of each bearing is fixedly bonded with the outer side of the corresponding screw (7), and the top of the circular sliding block (8) is further provided with two thread mounting through holes which are in thread mounting with the outer side of the corresponding screw (7).

6. A reamer bit for salvaging drilling tools as claimed in claim 1, wherein the central position of the bottom of the fixing base (9) is provided with a telescopic motor placing groove (10) for fixedly mounting a telescopic motor (11).

7. The reamer bit for salvaging drilling tools as claimed in claim 1, wherein the extrusion assembly comprises a rectangular guide rail mounting groove (20) formed in a corresponding side of the extrusion table (19), a rectangular guide rail (21) is welded and fixed on an inner wall of the side, away from an opening, of the rectangular guide rail mounting groove (20), a top of the rectangular guide rail (21) is welded and fixed on an inner wall of a top of the rectangular guide rail mounting groove (20), a bottom of the rectangular guide rail (21) is welded and fixed on an inner wall of a bottom of the rectangular guide rail mounting groove (20), one end, away from the arc-shaped drilling piece (12), of the horizontal connecting plate (23) is provided with a rectangular guide rail groove, wherein a top and a bottom of the rectangular guide rail groove are both provided with openings, and one end, away from the arc-shaped drilling piece (12), of the horizontal connecting plate (23) is slidably mounted on the rectangular guide rail (21) through the rectangular guide rail groove.

8. A reamer bit for drilling tool fishing according to claim 1, wherein the top and bottom of the extrusion table (19) are provided in a square configuration, and the top dimension of the extrusion table (19) is larger than the bottom dimension of the extrusion table (19).

9. The reaming bit for salvaging drilling tools as claimed in claim 1, wherein a rectangular movable groove (17) formed in the bottom of the fixing seat (9) is formed right above each arc-shaped drill bit (12), a horizontally arranged circular guide rod (18) is welded inside each rectangular movable groove (17), a rectangular sliding block (16) in sliding contact with the inner side wall of each rectangular movable groove (17) is slidably mounted on the outer side of each circular guide rod (18), the bottom of each rectangular sliding block (16) is fixedly welded to the top of the corresponding arc-shaped drill bit (12), the same spring (25) is fixedly welded to the inner wall of one side of each rectangular sliding block (16) far away from the telescopic motor (11) and the inner wall of one side of each rectangular movable groove (17) far away from the telescopic motor (11), each spring (25) is slidably sleeved on the outer side of the corresponding circular guide rod (18), and a circular guide through hole in sliding contact with the outer side of each circular guide rod (18) is formed in each rectangular sliding block (16) And a plurality of obliquely arranged side teeth are sequentially and equidistantly arranged on one side of each arc-shaped drill bit (12) far away from the extrusion table (19) from top to bottom.

10. The reaming bit for salvaging drilling tools as claimed in claim 1, wherein a storage battery for supplying power to the rotating motor (6), the telescopic motor (11) and the distance measuring sensor (14) is fixedly embedded in the front side of the bit connecting shaft (1), the distance measuring sensor (14) is wirelessly connected with a sound box for broadcasting the detection distance of the distance measuring sensor (14), and the two rotating motors (6) and the telescopic motor (11) are wirelessly matched with the same external remote controller.