CN112621329A

CN112621329A - Mechanical drill bit device for annular drill bit replacement

Info

Publication number: CN112621329A
Application number: CN202110050907.9A
Authority: CN
Inventors: 郭西
Original assignee: Shijiazhuang Editing Technology Co ltd
Current assignee: Shijiazhuang Editing Technology Co ltd
Priority date: 2021-01-14
Filing date: 2021-01-14
Publication date: 2021-04-09

Abstract

The invention discloses a mechanical drill bit device for annular drill bit replacement, which comprises a working box, wherein a working cavity with a downward opening is arranged in the working box, fixed blocks are fixed on the left inner wall and the right inner wall of the working cavity, fixed cavities which are bilaterally symmetrical and penetrate through the upper side and the lower side of the fixed blocks are arranged in the fixed blocks.

Description

Mechanical drill bit device for annular drill bit replacement

Technical Field

The invention relates to the field of mechanical drill bits, in particular to a mechanical drill bit device for annular drill bit replacement.

Background

The workpiece can be drilled in the process of using the annular drill bit device, the conventional mechanical drilling device only uses a drill bit of a lathe to drill the workpiece, the conventional device only can drill one hole for drilling, if the diameter of the drilled hole needs to be changed, the drill bit needs to be detached and replaced, the process is relatively complicated, the efficiency is low, the conventional device only clamps the drill bit singly without multiple clamping, the stability of the drill bit during drilling cannot be guaranteed, and the conventional mechanical drilling device does not have the function of automatically replacing the drill bit annularly.

Disclosure of Invention

The technical problem is as follows:

whether the annular automatic drill bit changing directly affects the drilling effect or not, and the existing mechanical drill bit device has no function of automatically changing the annular drill bit.

In order to solve the problems, the present embodiment designs a mechanical drill bit device for annular drill bit replacement, which comprises a working box, wherein the working box is internally provided with a working chamber with a downward opening, the left and right inner walls of the working chamber are fixed with fixed blocks, the fixed blocks are internally provided with fixed chambers which are bilaterally symmetrical and penetrate through the upper and lower sides of the fixed blocks, the left inner wall of the fixed chamber is fixed with a butt block which is symmetrical front and back, the outer side of the butt block is provided with two chutes which are high at the left side and low at the right side and symmetrical front and back, the lower side of the fixed chamber is provided with a circular groove which is bilaterally symmetrical and is connected with the fixed chamber in a penetrating way, the upper inner wall of the fixed chamber is fixed with an auxiliary butt block which extends downwards and front and back, the left side of the auxiliary butt block is provided with a through groove which penetrates through the left side and, the upper and lower inner walls of the connecting cavity are rotatably connected with a rotating shaft, a rotating wheel which is connected with the left inner wall of the connecting cavity in a sliding way and penetrates through the left inner wall of the connecting cavity is fixed on the outer side of the rotating shaft, a pushing wheel which is fixed on the outer side of the rotating wheel is arranged on the upper side of the rotating shaft, two clamping plates which are connected with the right inner wall of the connecting cavity in a sliding way and extend leftwards are arranged on the outer front side of the rotating shaft, the clamping plates on the upper side are arranged on the front side of the vertical section of the pushing wheel, the clamping plates on the lower side are arranged on the lower side of the rotating wheel, a spring is arranged between the lower side of the clamping plates on the lower side and the inner wall of the connecting cavity, a guy which surrounds the lower side and is fixed on the upper inner wall of the connecting cavity is fixed on the, connecting rod downside with be equipped with between the extension groove downside inner wall and encircle the compression spring of connecting rod, six centre gripping casees that vice butt piece outside sliding connection has the equidistance and distributes, centre gripping case sliding connection have sliding connection in the slider of circular recess downside inner wall, the slider upside with be equipped with between the centre gripping case and encircle the supporting spring of centre gripping case, the centre gripping incasement is equipped with big end down and runs through the centre gripping chamber of downside on the centre gripping case, the centre gripping intracavity is equipped with the clamping device who is used for carrying the drill bit for the first time, the fixed motor upside is equipped with and is used for the mobile device that the centre gripping case removed wantonly, the mobile device left side is equipped with the transmission that is used for power transmission, the working chamber upside is equipped with the drive arrangement who is.

Preferably, the clamping device comprises a connecting box fixed on the left and right inner walls of the clamping cavity, a connecting cavity is arranged in the connecting box, the upper and lower inner walls of the connecting cavity are connected with two clamping pieces which are bilaterally symmetrical in a sliding manner, the two clamping pieces are in threaded connection with a threaded shaft which is rotatably connected with the left inner wall of the connecting cavity, the right side of the threaded shaft is rotatably connected with a clamping motor fixed on the right inner wall of the connecting cavity, a drill bit penetrating through the upper and lower sides of the clamping box is arranged between the two clamping pieces, the upper side of each clamping piece is connected with a connecting rod which is slidably connected with the upper inner wall of the connecting cavity and extends upwards in a sliding manner, a semicircular block is fixed on the upper side of the connecting rod, a butting ball is butted on the outer side of the semicircular block on the left side, two connecting rods extending towards one side away from the butting ball, be equipped with the opening orientation in the linking piece butt ball and sliding connection in the linking groove of linking the pole, it keeps away from to link up the groove link up piece one side inner wall with be equipped with the linking spring between the pole, butt ball front side butt have vertical section rotate connect in the turning block of centre gripping chamber upside inner wall, the turning block right side rotates and is connected with the connecting block, the connecting block right side is fixed with fixed connection in the electric pull rod of centre gripping chamber upside inner wall.

Preferably, the mobile device includes sliding connection in two slide bars of centre gripping case upside and bilateral symmetry, two slide bar upside sliding connection has and is located the slide of drill bit upside, centre gripping case upside is equipped with about the drive box of working chamber symmetry center bilateral symmetry, be equipped with opening drive chamber down in the drive box, drive chamber upside inner wall sliding connection have downside sliding connection in five vice slides that slide and equidistance distribute.

Preferably, transmission including rotate connect in drive chamber upside inner wall and the drive shaft of upwards extending, the drive shaft downside is fixed with the transmission case, be equipped with downside and left side open-ended transmission chamber in the transmission case, the inner wall is fixed with the fixed plate around the transmission chamber, two clamp splice of fixed plate sliding connection front and back symmetry, two the lead screw that extends around clamp splice right side horizontal segment threaded connection, the lead screw rotates to be connected with and is fixed in the fixed plate downside just is located the rear side the vice motor of clamp splice horizontal segment rear side.

Preferably, the driving device comprises a fixed box fixed on the upper side of the driving box, a rotary connection is arranged in the fixed box, the auxiliary cavity is arranged on the upper side of the driving shaft, a gear fixed on the outer side of the driving shaft is arranged in the auxiliary cavity, an auxiliary gear is meshed with the right side of the gear, a fixed motor fixed on the upper side of the driving box is connected to the lower side of the auxiliary gear in a rotary mode, a driving shaft rotatably connected to the inner wall of the upper side of the working cavity is fixed on the upper side of the fixed box, a fixed gear is fixed on the outer side of the driving shaft, a driving gear is meshed with the left side of the fixed gear, and the driving gear is.

The invention has the beneficial effects that: the invention relates to a mechanical drill bit device for annular drill bit replacement, which can simultaneously clamp six drill bits with different diameters, and the drill bits required to be used are conveyed to the lower side of the center of the device by using disk rotation, so that the drill bits are convenient to drill, the power transmission connection of the drill bits can be realized at the position, the position of the drill bits is positioned, the positioning position of the drill bits can be in a clamping or loosening state by forward and reverse rotation of the drill bits, and the device can efficiently perform the work of drill bit replacement.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the structure a-a in fig. 1.

Fig. 3 is an enlarged internal view of the transmission case of fig. 1.

Fig. 4 is an enlarged internal structure diagram of the sub-abutting block of fig. 1.

Fig. 5 is an enlarged view of the inside of the clamping box of fig. 1.

Fig. 6 is a schematic diagram of the structure of B-B in fig. 5.

Detailed Description

The invention will now be described in detail with reference to fig. 1-6, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The invention relates to a mechanical drill bit device for annular drill bit replacement, which comprises a working box 11, wherein a working cavity 12 with a downward opening is arranged in the working box 11, fixed blocks 29 are fixed on the left and right inner walls of the working cavity 12, fixed cavities 30 which are bilaterally symmetrical and penetrate through the upper side and the lower side of the fixed blocks 29 are arranged in the fixed blocks 29, abutting blocks 36 which are bilaterally symmetrical are fixed on the left inner wall of the fixed cavity 30, two inclined grooves 37 which are high on the left side and low on the right side and are symmetrical on the front side and the rear side are arranged on the outer side of the abutting blocks 36, circular grooves 32 which are bilaterally symmetrical and are communicated with the fixed cavities 30 are arranged on the lower side of the fixed cavities 30, auxiliary abutting blocks 34 which extend downwards and extend forwards and backwards are fixed on the upper inner wall of the fixed cavities 30, a through groove 44 which penetrates through the left side and is large on the, the inner wall rotates about the coupling chamber 47 and is connected with pivot 46, the pivot 46 outside is fixed with sliding connection in the coupling chamber 47 left side inner wall and runs through the runner 45 of the coupling chamber 47 left side inner wall, the runner 45 upside is equipped with and is fixed in the impeller 48 in the pivot 46 outside, the outer front side of pivot 46 is equipped with sliding connection in the coupling chamber 47 right side inner wall and extends two splint 49 left, the upside the splint 49 is located the vertical section front side of impeller 48, the downside the splint 49 is located the runner 45 downside, the downside the splint 49 downside with be equipped with spring 53 between the coupling chamber 47 downside inner wall, the upside the splint 49 downside is fixed with encircles the downside the splint 49 and the upside is fixed in the cable 70 of the coupling chamber 47 upside inner wall, the upside the splint 49 downside is fixed with be located the extension piece 50 of cable 70 right side and downwardly extending, an extension groove 68 is arranged in the extension block 50, the inner wall of the extension groove 68 is slidably connected with a connecting rod 52 fixed on the upper side of the clamping plate 49 at the lower side, a compression spring 51 surrounding the connecting rod 52 is arranged between the lower side of the connecting rod 52 and the inner wall at the lower side of the extension groove 68, six clamping boxes 28 distributed at equal intervals are slidably connected to the outer side of the auxiliary abutting block 34, a sliding block 33 slidably connected with the inner wall at the lower side of the circular groove 32 is slidably connected with the clamping box 28, a supporting spring 31 surrounding the clamping box 28 is arranged between the upper side of the sliding block 33 and the clamping box 28, a clamping cavity 54 which is big in top and small bottom and penetrates through the upper side and the lower side of the clamping box 28 is arranged in the clamping cavity 54, a clamping device 901 for clamping a drill bit for the first time is arranged in the clamping cavity, a transmission device 903 for power transmission is arranged on the left side of the moving device 902, and a driving device 904 for driving tool changing is arranged on the upper side of the working cavity 12.

Advantageously, the clamping device 901 comprises an engaging box 57 fixed on the left and right inner walls of the clamping cavity 54, an engaging cavity 58 is arranged in the engaging box 57, two clamping members 60 which are bilaterally symmetrical are slidably connected on the upper and lower inner walls of the engaging cavity 58, a threaded shaft 59 which is rotatably connected on the left inner wall of the engaging cavity 58 is threadedly connected on the two clamping members 60, a clamping motor 71 fixed on the right inner wall of the engaging cavity 58 is rotatably connected on the right side of the threaded shaft 59, a drill 26 penetrating through the upper and lower sides of the clamping box 28 is arranged between the two clamping members 60, a connecting rod 56 which is slidably connected on the upper inner wall of the engaging cavity 58 and extends upwards is slidably connected on the upper side of the clamping member 60, a semicircular block 55 is fixed on the upper side of the connecting rod 56, a butting ball 61 is abutted on the outer side of the semicircular block 55 on the left side, two butting rods 64 extending towards the, an engaging block 62 fixed on the inner wall of the clamping cavity 54 is arranged on the side of the engaging rod 64 far away from the abutting ball 61, an engaging groove 69 with an opening facing the abutting ball 61 and slidably connected to the engaging rod 64 is arranged in the engaging block 62, an engaging spring 63 is arranged between the inner wall of the engaging groove 69 far away from the engaging block 62 and the engaging rod 64, a rotating block 65 with a vertical section rotatably connected to the inner wall of the upper side of the clamping cavity 54 is abutted on the front side of the abutting ball 61, a connecting block 66 is rotatably connected to the right side of the rotating block 65, an electric pull rod 67 fixedly connected to the inner wall of the upper side of the clamping cavity 54 is fixed to the right side of the connecting block 66, the clamping motor 71 rotates the threaded shaft 59, the threaded shaft 59 moves the two clamping members 60 to the side close to the drill bit 26 along the upper and lower inner walls of the engaging cavity 58, so that the drill bit 26 is clamped, the clamping piece 60 makes the connecting rod 56 drive the semicircular block 55 to clamp the drill bit 26 through the connecting rod 56, when the abutting ball 61 abuts against the semicircular block 55 on the left side, when the drill bit 26 is anticlockwise viewed from top, the abutting ball 61 does not influence the clamping box 28, when the drill bit 26 is clockwise viewed from top, the abutting block 36 makes the semicircular block 55 rotate clockwise, so that the abutting ball 61 and the abutting rod 64 push the clamping box 28 to rotate, and then the tool can be changed.

Beneficially, the moving device 902 includes two sliding rods 27 slidably connected to the upper side of the clamping box 28 and bilaterally symmetrical, two sliding rods 27 are slidably connected to the upper side of the sliding plate 25 located on the upper side of the drill bit 26, the upper side of the clamping box 28 is provided with a driving box 23 bilaterally symmetrical about the symmetrical center of the working chamber 12, a driving chamber 24 with a downward opening is arranged in the driving box 23, the inner wall of the upper side of the driving chamber 24 is slidably connected to five sub sliding plates 35 which are slidably connected to the sliding plate 25 and equidistantly distributed, and the sliding between the sub sliding plates 35 and the sliding plate 25 is in a cross relationship, so that the clamping box 28 can be moved arbitrarily in one plane.

Advantageously, the transmission 903 includes a driving shaft 17 rotatably connected to the upper inner wall of the driving cavity 24 and extending upward, a transmission case 38 is fixed to the lower side of the driving shaft 17, a transmission cavity 39 with an opening at the lower side and the left side is arranged in the transmission case 38, a fixing plate 41 is fixed to the front and rear inner walls of the transmission cavity 39, two clamping blocks 40 symmetrical front and rear are slidably connected to the fixing plate 41, a screw rod 43 extending front and rear is threadedly connected to the right horizontal section of the two clamping blocks 40, the screw rod 43 is rotatably connected to a secondary motor 42 fixed to the lower side of the fixing plate 41 and located at the rear side of the horizontal section of the clamping block 40, the secondary motor 42 rotates the screw rod 43, and the screw rod 43 moves the two clamping blocks 40 along the lower side of the fixing plate 41 to clamp the upper side of the drill bit 26.

Advantageously, the driving device 904 comprises a fixed box 19 fixed on the upper side of the driving box 23, a sub-cavity 20 rotatably connected on the upper side of the driving shaft 17 is arranged in the fixed box 19, a gear 18 fixed on the outer side of the driving shaft 17 is arranged in the sub-cavity 20, a sub-gear 21 is engaged and connected on the right side of the gear 18, a fixed motor 22 fixed on the upper side of the driving box 23 is rotatably connected on the lower side of the sub-gear 21, a driving shaft 16 rotatably connected on the inner wall of the upper side of the working chamber 12 is fixed on the upper side of the fixed box 19, a fixed gear 15 is fixed on the outer side of the driving shaft 16, a driving gear 13 is engaged and connected on the left side of the fixed gear 15, a driving motor 14 fixed on the inner wall of the upper side of the working chamber 12 is rotatably connected on the upper side of the driving gear, the driving shaft 16 rotates the driving box 23 through the fixing box 19 to exchange tools.

The use steps herein are described in detail below with reference to fig. 1-6:

initially, the driving motor 14, the fixed motor 22, the sub-motor 42, the clamping motor 71, and the electric pull rod 67 are in a closed state, the supporting spring 31, the compression spring 51, the spring 53, and the engaging spring 63 are in a compressed state, and the arc segments of the rotating block 65 are in a left-right symmetric state.

During operation, the heads of six drills 26 with different diameters are respectively placed into the six clamping cavities 54, the uppermost sides of the six drills 26 are located on the same plane, the clamping motor 71 is started, the threaded shaft 59 rotates, the threaded shaft 59 enables the two clamping pieces 60 to move towards one side close to the drills 26 along the inner walls of the upper side and the lower side of the connecting cavity 58 through the thread action until the drills 26 are clamped, at this time, the two semicircular blocks 55 move towards one side close to the semicircular blocks 55 through the connecting rod 56 due to the movement of the clamping pieces 60 until the drills 26 are clamped by the two semicircular blocks 55, the front sides of the semicircular blocks 55 abut against the arc sections of the rotating blocks 65, when the drills need to be used, the driving motor 14 is started, the driving gear 13 rotates, the driving gear 13 enables the fixed gear 15 to drive the driving shaft 16 to rotate clockwise in an overlooking mode, and the driving shaft 16 enables the fixed, the driving box 23 rotates to make the clamping box 28 rotate clockwise when looking down through the auxiliary sliding plate 35 and the sliding plate 25, at this time, the clamping box 28 will drive the sliding block 33 to rotate clockwise when looking down along the inner wall of the lower side of the circular groove 32, at this time, the sliding plate 25 will move back and forth along the lower side of the auxiliary sliding plate 35, at the same time, the auxiliary sliding plate 35 will move left and right along the inner wall of the upper side of the driving cavity 24, so that the clamping box 28 can move freely in one plane, when the drill bit to be used abuts against one section of the front side of the abutting block 36, the clamping box 28 will move along the circular arc surface of the abutting block 36, at this time, the clamping box 28 will move to the side of the inner wall of the vertical section close to the fixed cavity 30 along the inner wall of the inclined groove 37, at this time, the clamping box 28 will pull the sliding rod 27 to move downwards along the sliding, and the clamping box 28 will make the lower clamping plate 49 press downwards, the lower clamping plate 49 will make the spring 53 compressed, at the same time the lower clamping plate 49 will make the upper clamping plate 49 move downwards along the inner wall of the right side of the connecting cavity 47 by the pulling of the pulling cable 70, because the speed of the rope section is twice of the pulley, i.e. the moving speed of the upper clamping plate 49 is twice of the moving speed of the lower clamping plate 49, i.e. the clamping box 28 will be clamped by the upper clamping plate 49 and the lower clamping plate 49, the drill bit to be used at this time is located at the middle position of the fixed block 29, when the drill bit 26 moves along with the clamping box 28 to the middle position of the fixed block 29, the upper side of the drill bit 26 will just enter between the vertical sections of the two clamping blocks 40, the secondary motor 42 is started, so that the screw rod 43 rotates, the screw rod 43 makes the two clamping blocks 40 move against each other along the lower side of, the fixed motor 22 is started, the pinion 21 rotates, the pinion 21 drives the driving shaft 17 to rotate through the gear 18 by meshing, the driving shaft 17 drives the transmission case 38 to drive the drill bit 26 to rotate, at the moment, the drill bit 26 drills, if a drill bit needs to be changed, the electric pull rod 67 is started, the rotating block 65 rotates through the connecting block 66, the rotating block 65 moves the abutting ball 61 leftwards under the condition that the abutting ball 55 abuts against the abutting rod 64, the abutting rod 64 moves along the inner wall of the abutting groove 69, when the drill bit 26 rotates anticlockwise under the upward state, no influence is caused on the clamping box 28, when the drill bit 26 rotates clockwise under the upward condition, because the abutting ball 61 is abutted by the arc section of the rotating block 65, the drill bit 26 rotates clockwise through the semicircular block 55, the abutting ball 61 pushes the rotating block 65 and the clamping box 28 to rotate clockwise, when the clamping box 28 rotates, the two sliding rods 27 will rotate along the upper side of the clamping box 28, at the same time, the clamping box 28 will make the rotating wheel 45 drive the rotating shaft 46 to rotate counterclockwise from the bottom through meshing, the rotating shaft 46 will make the pushing wheel 48 rotate together, the inclined side of the pushing wheel 48 will make the clamping plate 49 on the upper side move upwards along the inner wall on the right side of the connecting cavity 47, at this time, the connecting rod 52 will slide along the inner wall of the extending groove 68, the compression spring 51 will be compressed, at this time, the two clamping plates 49 will not have clamping effect on the clamping box 28, the secondary motor 42 will be started again to reverse, so that the two clamping blocks 40 will not clamp the upper side of the drill bit 26 again, the driving motor 14 will be started again, so that the driving box 23 will drive the six clamping boxes 28 to continue to move, at this time, the clamping box 28 that is ready to be replaced will move upwards along the inner wall of the chute 37 on the rear, the drill bits 26 of different diameters are controlled by the driving motor 14, the drill bits 26 are rotated by the fixed motor 22, and the drill bits 26 to be drilled are power-transmitted by the sub motor 42.

At the end, the six drills 26 having different diameters are removed to restore the apparatus to the original state, and the driving motor 14, the fixing motor 22, the sub motor 42, the clamp motor 71, and the electric pull rod 67 are turned off.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a mechanical drill bit device for drill bit is traded to annular, includes the work box, be equipped with the decurrent working chamber of opening in the work box, the inner wall is fixed with the fixed block about the working chamber, be equipped with bilateral symmetry in the fixed block and run through the fixed chamber of downside on the fixed block, its characterized in that: the fixed cavity left side inner wall is fixed with symmetrical butt blocks in the front-back direction, the outer side of the butt block is provided with two chutes which are high at the left side and low at the right side and symmetrical in the front-back direction, the lower side of the fixed cavity is provided with a circular groove which is symmetrical in the left-right direction and is connected with the fixed cavity in a through manner, the upper side inner wall of the fixed cavity is fixed with an auxiliary butt block which extends downwards and extends in the front-back direction, the left side of the auxiliary butt block is provided with a through groove which is penetrated in the left side and is big at the top, the right side of the through groove is provided with a connecting cavity positioned in the auxiliary butt block, the upper and lower inner walls of the connecting cavity are rotatably connected with a rotating shaft, the outer side of the rotating shaft is fixed with a rotating wheel which is slidably connected with the left side inner wall of the connecting, the upper side of the clamping plate is positioned in front of the vertical section of the push wheel, the lower side of the clamping plate is positioned at the lower side of the rotating wheel, a spring is arranged between the lower side of the clamping plate and the lower side inner wall of the connecting cavity, the lower side of the clamping plate is fixed with a guy cable which surrounds the lower side of the clamping plate, the upper side of the clamping plate is fixed with an extending block which is positioned at the right side of the guy cable and extends downwards, an extending groove is arranged in the extending block, the inner wall of the extending groove is in sliding connection with a connecting rod which is fixed at the upper side of the lower side of the clamping plate, a compression spring which surrounds the connecting rod is arranged between the lower side of the connecting rod and the lower side inner wall of the extending groove, six clamping boxes which are distributed at equal intervals are in sliding connection with the outer side of the auxiliary abutting block, a sliding, the utility model discloses a drill bit clamping device, including centre gripping case, fixed motor, clamping chamber, mobile device, working chamber upside, clamping chamber, fixed motor upside, fixed motor, clamping chamber, fixed motor upside, clamping chamber.

2. A mechanical drill bit assembly for annular ring replacement of a drill bit as claimed in claim 1, wherein: the clamping device comprises a connecting box fixed on the left inner wall and the right inner wall of the clamping cavity, a connecting cavity is arranged in the connecting box, the upper inner wall and the lower inner wall of the connecting cavity are connected with two clamping pieces which are bilaterally symmetrical in a sliding manner, the two clamping pieces are in threaded connection with a threaded shaft which is rotatably connected with the left inner wall of the connecting cavity, the right side of the threaded shaft is rotatably connected with a clamping motor fixed on the right inner wall of the connecting cavity, a drill bit which penetrates through the upper side and the lower side of the clamping box is arranged between the two clamping pieces, the upper side of each clamping piece is connected with a connecting rod which is connected with the upper inner wall of the connecting cavity in a sliding manner and extends upwards, a semicircular block is fixed on the upper side of each connecting rod, a butting ball is butted on the outer side of the semicircular block on the left side, two connecting, be equipped with the opening orientation in the linking piece butt ball and sliding connection in the linking groove of linking the pole, it keeps away from to link up the groove link up piece one side inner wall with be equipped with the linking spring between the pole, butt ball front side butt have vertical section rotate connect in the turning block of centre gripping chamber upside inner wall, the turning block right side rotates and is connected with the connecting block, the connecting block right side is fixed with fixed connection in the electric pull rod of centre gripping chamber upside inner wall.

3. A mechanical drill bit assembly for annular ring replacement of a drill bit as claimed in claim 2, wherein: the mobile device comprises two sliding rods which are connected with the clamping box in a sliding mode and are in bilateral symmetry, the sliding rods are connected with the sliding plates on the drill bit in a sliding mode, the clamping box is provided with a driving box with a working cavity symmetrical center in bilateral symmetry, a driving cavity with a downward opening is arranged in the driving box, and the inner wall of the driving cavity is connected with five auxiliary sliding plates which are in sliding connection with the sliding plates and are distributed at equal intervals.

4. A mechanical drill bit assembly for annular ring replacement of a drill bit as claimed in claim 3, wherein: transmission including rotate connect in drive chamber upside inner wall and the drive shaft of upwards extending, the drive shaft downside is fixed with the transmission case, be equipped with downside and left side open-ended transmission chamber in the transmission case, the inner wall is fixed with the fixed plate around the transmission chamber, two clamp splice of symmetry around the fixed plate sliding connection have, two the lead screw that extends around clamp splice right side horizontal segment threaded connection, the lead screw rotates to be connected with and is fixed in the fixed plate downside just is located the rear side the vice motor of clamp splice horizontal segment rear side.

5. A mechanical drill bit assembly for annular ring replacement of a drill bit as claimed in claim 4, wherein: drive arrangement is including being fixed in the fixed case of drive case upside, be equipped with in the fixed case rotate connect in the vice chamber of drive shaft upside, be equipped with in the vice intracavity and be fixed in the gear in the drive shaft outside, the meshing of gear right side is connected with the pinion, the pinion downside rotates to be connected with and is fixed in the fixed motor of drive case upside, fixed case upside is fixed with rotate connect in the driving shaft of working chamber upside inner wall, the driving shaft outside is fixed with fixed gear, the meshing of fixed gear left side is connected with drive gear, the drive gear upside rotates to be connected with and is fixed in the driving motor of working chamber upside inner wall.