CN114734076A

CN114734076A - Combined reamer

Info

Publication number: CN114734076A
Application number: CN202210340979.1A
Authority: CN
Inventors: 郁江华; 武冰; 赵静; 骆伟; 车景矿; 张松林
Original assignee: Zoucheng Yankuang Taide Industry and Trade Co Ltd
Current assignee: Shandong Yanneng Taide Heavy Industry Co.,Ltd.
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-07-12
Anticipated expiration: 2042-04-02
Also published as: CN114734076B

Abstract

The invention relates to a combined reamer, which comprises a supporting device and a reaming device arranged on the supporting device, wherein the supporting device comprises a supporting plate, the supporting plate is of a cross structure, sleeves are arranged at four ends of the bottom of the supporting plate, a loop bar is arranged in the bottom end of each sleeve in a sliding manner, in the combined reamer, a first piston is driven to reciprocate through the rotation of a driving rod, a piston cylinder is enabled to suck air through a one-way air inlet valve, a first one-way exhaust valve exhausts the air, the air enables a through hole to generate negative pressure through a connecting pipe, the negative pressure sucks debris into the through hole through a through groove and drops the debris through gravity factors, so that the debris is rapidly exhausted, and the problems that the debris is driven to be in contact with a hole of a base material in the rotation process of a conical drill, the debris is abraded to the hole, the side wall of the hole of an expansion opening is not uniform enough, and additional polishing is needed are solved.

Description

Combined reamer

Technical Field

The present invention relates to reamers, and more particularly, to combination reamers.

Background

Reaming means enlarging the bottom of a borehole or of some type of foundation pier in order to increase its load-bearing area; and reducing the wall thickness of the hollow blank to increase the inner diameter and the outer diameter of the hollow blank. When the hole is enlarged, the reamer is used, the conical drill is rotated in the hole to be machined, and then the hole can be enlarged through the conical drill by pressing forcibly. The piece that produces during reaming is more, and the taper drill rotates the hole contact of in-process drive piece and substrate, leads to the piece to cause wearing and tearing to the hole, makes the hole lateral wall of expansion mouth not enough even, still needs to carry out extra polishing.

Disclosure of Invention

The present invention is directed to a combination reamer to solve the problems of the related art.

For realizing above-mentioned purpose, provide combination reamer, including strutting arrangement and the reaming device of setting on strutting arrangement, strutting arrangement includes the backup pad, the backup pad is cruciform structure, four ends in the bottom of backup pad are provided with the sleeve, the inside slip in telescopic bottom is provided with the loop bar, reaming device includes at least:

the driving mechanism comprises a driving rod, the driving rod penetrates through the support plate, the driving rod is located at the center of the support plate, the driving rod is rotatably connected with the support plate, a straight rod is arranged on the side wall of the driving rod, an eccentric shaft is arranged at the bottom end of the driving rod, a driven rod is arranged at the bottom of the eccentric shaft, a flowing cavity is formed in the bottom end of the driven rod in a penetrating mode, a first notch communicated with the flowing cavity is formed in the side wall of the driven rod, a first sleeve is rotatably arranged at the position, located at the first notch, of the outer wall of the driven rod, and a through hole is formed in the side wall of the first sleeve in a penetrating mode;

the negative pressure mechanism comprises a piston cylinder, a first piston is arranged in the piston cylinder in a sliding mode, one end of the first piston is hinged to a connecting rod, one end of the connecting rod is rotatably connected with the eccentric shaft, a first one-way exhaust valve and a one-way air inlet valve are arranged on the side wall of the piston cylinder, one end of the one-way air inlet valve is communicated with a connecting pipe, and the other end of the connecting pipe is inserted into the through hole;

the reaming mechanism comprises a drill bit, the drill bit is of a conical structure, the top of the drill bit is fixedly connected with the bottom end of the driven rod, the top of the drill bit is penetrated through and provided with a through hole, the through hole is communicated with the flowing cavity, the side wall of the drill bit is provided with a plurality of penetrating grooves, and the penetrating grooves are communicated with the through hole.

As a further improvement of the technical scheme, the top of the loop bar is provided with a return spring, and the top end of the return spring is fixed on the inner wall of the top of the sleeve.

As a further improvement of the technical scheme, an installation cavity is formed in the bottom of the loop bar, a compression spring is arranged at the top of the installation cavity, a sliding block is connected to the bottom end of the compression spring and arranged at the bottom end of the installation cavity in a sliding mode, and a roller is arranged at the bottom of the sliding block in a rotating mode.

As a further improvement of the technical scheme, a filter screen is arranged in the through hole and used for blocking the scraps.

As a further improvement of the technical scheme, the top of the driving rod is provided with a groove, the side wall of the top of the piston cylinder is in threaded connection with a threaded column, and one end of the threaded column penetrates into the groove.

As a further improvement of the technical scheme, a plurality of mounting grooves are formed in the bottom of the drill bit, inserting rods are inserted in the mounting grooves, and baffles are arranged at the bottom ends of the inserting rods.

As a further improvement of the technical scheme, the side wall of the piston cylinder is provided with a fixed pipe at the positions of the first one-way exhaust valve and the one-way intake valve, and the fixed pipe is in plug-in fit with the connecting pipe.

As a further improvement of the technical scheme, a liquid storage tank is arranged at the bottom of the supporting plate and is communicated with the connecting pipe, a liquid conveying pipe is communicated with the bottom of the liquid storage tank, a spray head is arranged in the liquid conveying pipe, and one end of the liquid conveying pipe is inserted into the through hole.

As a further improvement of this technical scheme, the second breach that is linked together with the chamber that flows is seted up to the driven lever lateral wall, the second breach is located the top of first breach, the driven lever outer wall is located second breach department and rotates and is provided with the second lantern ring, second lantern ring outer wall intercommunication has the blast pipe, the piston cylinder lateral wall is provided with the one-way discharge valve of second, the one-way discharge valve of second and blast pipe one end intercommunication, it is provided with the second piston to flow the intracavity slip, the bottom of second piston is provided with the conical rod, the chamber of ventilating has been seted up in the conical rod, the air vent that is linked together with the chamber of ventilating has been seted up to the conical rod outer wall, the bottom outer wall of driven lever is fixed and is provided with solid fixed ring, the drill bit comprises a plurality of drill blocks, the top of drill block is provided with the swivel, the swivel rotates and sets up at solid fixed ring outer wall.

As a further improvement of the technical scheme, a piston plate is arranged at the top of the second piston, an installation spring is arranged between the piston plate and the second piston, a push rod is arranged at the bottom of the piston plate and penetrates through the second piston, the push rod penetrates through the conical rod, and a connection spring is arranged between the inserted rod and the installation groove.

Compared with the prior art, the invention has the beneficial effects that:

1. in this combination enlarger, rotate through the actuating lever and drive first piston reciprocating motion, make the piston cylinder breathe in through one-way admission valve, first one-way discharge valve is carminative, gas makes the negative pressure in the through-hole through the connecting pipe, the negative pressure is inhaled the piece to the through-hole in through wearing the groove, and drop through the gravity factor, so that to the quick discharge of piece, the hole contact of toper brill rotation in-process drive piece and substrate has been solved, lead to the piece to lead to the fact wearing and tearing to the hole, make the hole lateral wall of expansion mouth not enough even, still need carry out the extra problem of polishing.

2. In this combination enlarger, first piston pressurizes in through first one-way discharge valve and connecting pipe to the liquid reserve tank, and the liquid reserve tank internal pressure is too big, makes the water in the liquid reserve tank pass through the shower nozzle blowout to the transfer line in, flows into the chamber and the through-hole that flow through the transfer line again, through the baffle to the sealed of through-hole bottom, the liquid of through-hole just flows through wearing the groove this moment to in cooling to the drill bit.

3. In the combined reamer, the first piston reciprocates to enable gas in the piston cylinder to be discharged through the second one-way exhaust valve and discharged into the flowing cavity through the exhaust pipe and the second notch, the pressure intensity in the flowing cavity is increased to push the second piston, the second piston drives the conical rod to move downwards, the conical rod moves downwards to push the inner wall of the drill block, and the drill block rotates through the fixing ring to enable the drill blocks to be enlarged, so that the diameter of a drill bit is enlarged.

Drawings

FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;

FIG. 2 is a schematic structural view of a supporting device according to embodiment 1 of the present invention;

fig. 3 is a schematic structural view of a reaming device in embodiment 1 of the present invention;

FIG. 4 is a schematic structural view of a drive mechanism according to embodiment 1 of the present invention;

fig. 5 is a schematic structural view of a negative pressure mechanism in embodiment 1 of the present invention;

FIG. 6 is a cross-sectional view of a drill bit according to embodiment 1 of the present invention;

FIG. 7 is a schematic structural view of a liquid storage tank in embodiment 2 of the present invention;

FIG. 8 is a schematic view of a tapered rod structure according to embodiment 3 of the present invention;

FIG. 9 is an enlarged view of the tapered rod A of embodiment 3 of FIG. 8;

fig. 10 is a schematic sectional view of a tapered rod according to embodiment 3 of the present invention.

The various reference numbers in the figures mean:

100. a support device;

110. a support plate; 111. a sleeve; 112. a loop bar; 113. a return spring;

120. a mounting cavity; 121. a compression spring; 122. a slider; 123. a roller;

200. a reaming device;

210. a drive mechanism; 211. a drive rod; 212. a straight rod; 213. an eccentric shaft; 214. a driven lever; 215. a flow chamber; 216. a first notch; 217. a first sleeve; 218. perforating; 219. a filter screen;

220. a negative pressure mechanism; 221. a piston cylinder; 222. a first piston; 223. a connecting rod; 224. a first one-way exhaust valve; 225. a one-way intake valve; 226. a connecting pipe; 227. a fixed tube;

230. a hole expanding mechanism; 231. a drill bit; 232. a through hole; 233. penetrating a groove; 234. mounting grooves; 235. inserting a rod; 236. a baffle plate; 237. a connecting spring;

240. a groove; 241. a threaded post;

250. a liquid storage tank; 251. a transfusion tube; 252. a spray head;

260. a second one-way exhaust valve; 261. an exhaust pipe; 262. a second notch; 263. a second collar; 264. a second piston; 265. a tapered rod; 266. a vent lumen; 267. a vent hole; 268. a fixing ring; 269. drilling a block; 270. rotating the ring; 271. a piston plate; 272. installing a spring; 273. a push rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1 to 6, a combined reamer is provided, which includes a supporting device 100 and a reaming device 200 disposed on the supporting device 100, the supporting device 100 includes a supporting plate 110, the supporting plate 110 is a cross structure, the cross supporting plate 110 improves supporting performance for the reaming device 200, and prevents a wobbling phenomenon from occurring during reaming, four ends of the bottom of the supporting plate 110 are provided with sleeves 111, a sleeve rod 112 is slidably disposed inside the bottom end of the sleeves 111, and the reaming device 200 at least includes:

the driving mechanism 210 comprises a driving rod 211, the driving rod 211 penetrates through the supporting plate 110, the driving rod 211 is located at the center of the supporting plate 110, the driving rod 211 is rotatably connected with the supporting plate 110, a straight rod 212 is arranged on the side wall of the driving rod 211, an eccentric shaft 213 is arranged at the bottom end of the driving rod 211, a driven rod 214 is arranged at the bottom end of the eccentric shaft 213, a flow cavity 215 is formed in the bottom end of the driven rod 214 in a penetrating manner, a first notch 216 communicated with the flow cavity 215 is formed in the side wall of the driven rod 214, a first sleeve 217 is rotatably arranged on the outer wall of the driven rod 214 at the first notch 216, the first notch 216 is communicated with the connecting pipe 226 through the first sleeve 217, negative pressure in the connecting pipe 226 can enter the rotating flow cavity 215, and a through hole 218 is formed in the side wall of the first sleeve 217 in a penetrating manner;

the negative pressure mechanism 220 comprises a piston cylinder 221, a first piston 222 is arranged in the piston cylinder 221 in a sliding mode, one end of the first piston 222 is hinged to a connecting rod 223, one end of the connecting rod 223 is rotatably connected with the eccentric shaft 213, a first one-way exhaust valve 224 and a one-way intake valve 225 are arranged on the side wall of the piston cylinder 221, one end of the one-way intake valve 225 is communicated with a connecting pipe 226, and the other end of the connecting pipe 226 is inserted into the through hole 218;

reamer mechanism 230, reamer mechanism 230 includes drill bit 231, drill bit 231 is an integral structure, integral structure is stronger, so as to process harder parts, the drill bit 231 is in a conical structure, the bottom end of the conical drill bit 231 can be firstly plugged into the processing hole, so as to position the hole, the top of the drill 231 is fixedly connected with the bottom end of the driven rod 214, the top of the drill 231 is provided with a through hole 232 in a penetrating way, the through hole 232 is communicated with the flow cavity 215, the side wall of the drill 231 is provided with a plurality of through grooves 233, the through grooves 233 are communicated with the through hole 232, the first piston 222 is driven to reciprocate by the rotation of the driving rod 211, so that the piston cylinder 221 sucks air through the one-way air inlet valve 225, the first one-way air outlet valve 224 exhausts air, the air enables negative pressure to be generated in the through hole 232 through the connecting pipe 226, the negative pressure sucks debris into the through hole 232 through the through groove 233 and drops through gravity factors, and therefore the debris can be rapidly discharged.

When the supporting device 100 and the hole expanding device 200 of the present embodiment are used specifically, the bottom end of the drill 231 is inserted into a hole to be expanded, the driving rod 211 is rotated by the straight rod 212, and the device is pressed downward forcibly, the driving rod 211 drives the drill 231 to rotate by the driven rod 214, the drill 231 rotates and moves downward to grind and cut the hole, so that the hole becomes larger, meanwhile, the driving rod 211 drives the first piston 222 to reciprocate in the piston cylinder 221 by the eccentric shaft 213 and the connecting rod 223, so that the piston cylinder 221 sucks in outside air through the one-way air inlet valve 225, and then discharges the sucked air through the first one-way air outlet valve 224, the one-way air inlet valve 225 sucks in air to generate negative pressure in the connecting pipe 226, the flow cavity 215, and the through hole 232, the negative pressure sucks debris on the side wall of the drill 231 into the through hole 232 through the through groove 233, and drops through the bottom end of the through hole 232 by its own gravity. It should be noted that the side wall of the drill bit 231 is provided with a raised thread, so that a certain gap is formed between the outer wall of the drill bit 231 and the hole when the outer wall of the drill bit 231 rotates, and then the chips are sucked into the through groove 233 through the gap.

In addition, in order to facilitate the quick reset of the support plate 110, the top of the loop bar 112 is provided with a return spring 113, the top end of the return spring 113 is fixed on the inner wall of the top of the sleeve 111, and considering that the support plate 110 cannot move upwards after being pressed, the drill 231 is always in contact with the machined part, so as to avoid unnecessary wear, for this reason, when the support plate 110 is in a stressed state, the return spring 113 generates compression, when the support plate 110 is not stressed, the return spring 113 rebounds to push the sleeve 111 through the loop bar 112, and further drives the reset of the support plate 110.

Furthermore, in order to facilitate the adjustment of the position of the drill bit 231, the bottom of the loop bar 112 is provided with a mounting cavity 120, the top of the mounting cavity 120 is provided with a compression spring 121, the bottom end of the compression spring 121 is connected with a slider 122, the slider 122 is slidably arranged at the bottom end of the mounting cavity 120, the bottom of the slider 122 is rotatably provided with a roller 123, and considering that the drill bit 231 needs to be located at the middle position of the processed hole, therefore, the supporting plate 110 is pressed to move the drill bit 231 down into the hole, the outer wall of the drill bit 231 contacts with the hole, if the drill bit 231 is not located at the center of the hole, a portion of the side wall of the bit 231 contacts the inner wall of the hole, which applies a force to the bit 231, causing the bit 231 to slide through the rollers 123, and the position of the device can be adjusted, when the hole is expanded, the support plate 110 is pressed to compress the compression spring 121, the bottom of the mounting cavity 120 is contacted with a workpiece, and at the moment, the mounting cavity 120 cannot slide, so that the processing stability is not changed.

Still further, in order to prevent the debris from being sucked into the piston cylinder 221, a filter screen 219 is disposed in the through hole 218, and the filter screen 219 is used for blocking the debris, so that when the debris is sucked into the flow chamber 215, the filter screen 219 blocks the debris, so that the debris cannot pass through the filter screen 219, and the debris is prevented from being sucked into the piston cylinder 221.

Specifically, in order to reduce the artifical labour who rotates drive lever 211, recess 240 has been seted up at the top of drive lever 211, the lateral wall threaded connection at piston cylinder 221 top has screw thread post 241, screw thread post 241 one end penetrates in recess 240, it is tired to consider artifical rotation straight-bar 212, for this reason, insert drive arrangement's output in recess 240, it makes the output shaft fix in recess 240 to rotate screw thread post 241, output shaft this moment rotates alright drive lever 211 and rotates.

In addition, in order to facilitate the collection of the chips, a plurality of mounting grooves 234 are formed in the bottom of the drill bit 231, an insertion rod 235 is inserted into the mounting groove 234, a baffle 236 is arranged at the bottom end of the insertion rod 235, and in consideration of some circumstances, the chips drop to affect the surrounding environment, therefore, the baffle 236 seals the bottom end of the through hole 232, the chips in the through hole 232 cannot drop outside at the moment, and when the chips need to be taken out, the baffle 236 is pulled, and the insertion rod 235 is separated from the mounting groove 234.

Further, in order to facilitate the fixation of the connection pipe 226, the side wall of the piston cylinder 221 is located at the first one-way exhaust valve 224 and the one-way intake valve 225 and is provided with the fixed pipe 227, the fixed pipe 227 is in plug-in fit with the connection pipe 226, the connection pipe 226 is inserted into the first one-way exhaust valve 224, the exhausted wind can be blown into the drill bit 231, the temperature reduction of the drill bit 231 is achieved, however, the connection pipe 226 is more cumbersome to connect with the one-way intake valve 225 and the first one-way exhaust valve 224, therefore, the connection pipe 226 is directly plugged into the outer wall of the fixed pipe 227 through the fixed pipe 227, and the switching efficiency is improved.

Example 2

In order to realize the cooling of the drill bit 231, the following modifications are made on the basis of embodiment 1:

referring to fig. 7, a liquid storage tank 250 is disposed at the bottom of the supporting plate 110, the liquid storage tank 250 is communicated with a connecting pipe 226, a liquid conveying pipe 251 is communicated with the bottom of the liquid storage tank 250, a nozzle 252 is disposed in the liquid conveying pipe 251, the nozzle 252 can prevent water in the liquid storage tank 250 from flowing out under normal pressure, one end of the liquid conveying pipe 251 is inserted into the through hole 218, considering that the temperature of the drill bit 231 can be rapidly increased when drilling metal parts, and the service life of the drill bit 231 is affected, for this reason, one end of the connecting pipe 226 is communicated with the first one-way exhaust valve 224, at this time, the first piston 222 pressurizes the liquid storage tank 250 through the first one-way exhaust valve 224 and the connecting pipe 226, the pressure in the liquid storage tank 250 is too high, so that the water in the liquid storage tank 250 is ejected out of the liquid conveying pipe 251 through the nozzle 252, and then flows into the flow cavity 215 and the through hole 232 through the baffle 236, and the bottom end of the through hole 232 is sealed, at this time, the liquid in the through hole 232 flows out through the through groove 233, thereby cooling the drill bit 231.

Example 3

In order to increase the hole-enlarging diameter of the drill 231, the following modifications are made on the basis of the embodiment 1:

referring to fig. 8-9, a second notch 262 communicated with the flow cavity 215 is formed in a side wall of the driven rod 214, the second notch 262 is located above the first notch 216, a second collar 263 is rotatably disposed at the second notch 262 on an outer wall of the driven rod 214, an exhaust pipe 261 is communicated with an outer wall of the second collar 263, a second one-way exhaust valve 260 is disposed on a side wall of the piston cylinder 221, the second one-way exhaust valve 260 is communicated with one end of the exhaust pipe 261, a second piston 264 is slidably disposed in the flow cavity 215, a tapered rod 265 is disposed at a bottom of the second piston 264, a vent cavity 266 is formed in the tapered rod 265, a vent hole 267 communicated with the vent cavity 266 is formed in the outer wall of the tapered rod 265, a fixing ring 268 is fixedly disposed on an outer wall of a bottom end of the driven rod 214, the drill bit 231 is composed of a plurality of drill blocks 269, a swivel ring 270 is disposed at a top of the drill block 269, the swivel ring 270 is rotatably disposed on an outer wall of the fixing ring 268, considering that when some holes are large, the larger through hole 232 needs to be replaced, for this reason, the reciprocating motion of the first piston 222 causes the gas in the piston cylinder 221 to be exhausted through the second one-way exhaust valve 260, and the gas is exhausted into the flow chamber 215 through the exhaust pipe 261 and the second notch 262, the pressure in the flow chamber 215 becomes high to push the second piston 264, the second piston 264 drives the tapered rod 265 to move downwards, the tapered rod 265 moves downwards to push the inner wall of the drill block 269, the drill block 269 rotates through the fixing ring 268 to enlarge the space between the drill blocks 269, and further, the diameter of the drill bit 231 can be enlarged.

In addition, in order to realize rapid discharge of the debris, a piston plate 271 is disposed at the top of the second piston 264, a mounting spring 272 is disposed between the piston plate 271 and the second piston 264, a push rod 273 is disposed at the bottom of the piston plate 271, the push rod 273 is disposed through the second piston 264, the push rod 273 is disposed through the tapered rod 265, a connecting spring 237 is disposed between the insert rod 235 and the mounting groove 234, when the baffle 236 is installed at the bottom of the drill bit 231, if the debris in the through hole 232 needs to be discharged, the exhaust pipe 261 is communicated with the second one-way exhaust valve 260, at this time, the high pressure of the flow chamber 215 pushes the piston plate 271 to move downwards, the piston plate 271 drives the installation spring 272 to move downwards and push the baffle 236 to move, a gap is generated between the baffle 236 and the bottom end of the through hole 232, at this time, the debris can be discharged, the device does not need to stop running, the baffle 236 is always at the bottom of the bit 231 by the push rod 273, and the baffle 236 does not need to be removed.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The combination enlarger, its characterized in that: including strutting arrangement (100) and reaming device (200) of setting on strutting arrangement (100), strutting arrangement (100) are including backup pad (110), backup pad (110) are the cruciform structure, four ends in the bottom of backup pad (110) are provided with sleeve (111), the inside slip in bottom of sleeve (111) is provided with loop bar (112), reaming device (200) includes at least:

the driving mechanism (210) comprises a driving rod (211), the driving rod (211) penetrates through the supporting plate (110) and is arranged at the center of the supporting plate (110), the driving rod (211) is rotatably connected with the supporting plate (110), a straight rod (212) is arranged on the side wall of the driving rod (211), an eccentric shaft (213) is arranged at the bottom end of the driving rod (211), a driven rod (214) is arranged at the bottom of the eccentric shaft (213), a flowing cavity (215) is formed in the bottom end of the driven rod (214) in a penetrating manner, a first notch (216) communicated with the flowing cavity (215) is formed in the side wall of the driven rod (214), a first sleeve (217) is rotatably arranged at the position, located at the first notch (216), of the outer wall of the driven rod (214), and a through hole (218) is formed in the side wall of the first sleeve (217) in a penetrating manner;

the negative pressure mechanism (220) comprises a piston cylinder (221), a first piston (222) is arranged in the piston cylinder (221) in a sliding mode, one end of the first piston (222) is hinged to a connecting rod (223), one end of the connecting rod (223) is rotatably connected with an eccentric shaft (213), a first one-way exhaust valve (224) and a one-way air inlet valve (225) are arranged on the side wall of the piston cylinder (221), one end of the one-way air inlet valve (225) is communicated with a connecting pipe (226), and the other end of the connecting pipe (226) is inserted into the through hole (218);

reamer mechanism (230), reamer mechanism (230) includes drill bit (231), drill bit (231) are the toper structure, the bottom fixed connection of drill bit (231) top and driven lever (214), through-hole (232) have been seted up in drill bit (231) top run-through, through-hole (232) and flow chamber (215) intercommunication, a plurality of wearing grooves (233) have been seted up to drill bit (231) lateral wall, wearing groove (233) and through-hole (232) intercommunication.

2. The combination reamer of claim 1, wherein: the top of loop bar (112) is provided with reset spring (113), reset spring (113)'s top is fixed at the top inner wall of sleeve (111).

3. The combination reamer of claim 1, wherein: installation cavity (120) have been seted up to the bottom of loop bar (112), installation cavity (120) top is provided with compression spring (121), compression spring (121) bottom is connected with slider (122), slider (122) slide and set up the bottom in installation cavity (120), slider (122) bottom is rotated and is provided with roller (123).

4. The combination reamer of claim 1, wherein: a filter screen (219) is arranged in the through hole (218), and the filter screen (219) is used for blocking the debris.

5. The combination reamer of claim 1, wherein: the top of the driving rod (211) is provided with a groove (240), the side wall of the top of the piston cylinder (221) is in threaded connection with a threaded column (241), and one end of the threaded column (241) penetrates into the groove (240).

6. The combination reamer of claim 1, wherein: a plurality of mounting grooves (234) have been seted up to the bottom of drill bit (231), it has inserted peg (235) to peg graft in mounting groove (234), the bottom of peg (235) is provided with baffle (236).

7. The combination reamer of claim 1, wherein: the side wall of the piston cylinder (221) is located at a first one-way exhaust valve (224) and a one-way intake valve (225) and is provided with a fixed pipe (227), and the fixed pipe (227) is in plug-in fit with a connecting pipe (226).

8. The combination reamer of claim 1, wherein: a liquid storage tank (250) is arranged at the bottom of the supporting plate (110), the liquid storage tank (250) is communicated with a connecting pipe (226), a liquid conveying pipe (251) is communicated with the bottom of the liquid storage tank (250), a spray head (252) is arranged in the liquid conveying pipe (251), and one end of the liquid conveying pipe (251) is inserted into the through hole (218).

9. The combination reamer of claim 6, wherein: the side wall of the driven rod (214) is provided with a second notch (262) communicated with the flowing cavity (215), the second notch (262) is positioned above the first notch (216), the outer wall of the driven rod (214) is positioned at the second notch (262) and is rotatably provided with a second lantern ring (263), the outer wall of the second lantern ring (263) is communicated with an exhaust pipe (261), the side wall of the piston cylinder (221) is provided with a second one-way exhaust valve (260), the second one-way exhaust valve (260) is communicated with one end of the exhaust pipe (261), a second piston (264) is slidably arranged in the flowing cavity (215), the bottom of the second piston (264) is provided with a conical rod (265), a ventilation cavity (266) is formed in the conical rod (265), the outer wall of the conical rod (265) is provided with a ventilation hole (267) communicated with the ventilation cavity (266), and the outer wall of the bottom end of the driven rod (214) is fixedly provided with a fixing ring (268), the drill bit (231) is composed of a plurality of drill blocks (269), a rotating ring (270) is arranged at the top of each drill block (269), and the rotating ring (270) is rotatably arranged on the outer wall of the fixing ring (268).

10. The combination reamer of claim 9, wherein: the top of second piston (264) is provided with piston board (271), be provided with between piston board (271) and second piston (264) installation spring (272), piston board (271) bottom is provided with push rod (273), push rod (273) run through second piston (264) and set up, push rod (273) run through conical rod (265) and set up, be provided with between inserted bar (235) and mounting groove (234) coupling spring (237).