CN210061604U - Drill bit for drilling circular groove on inner side wall of sealing ring - Google Patents

Abstract

The utility model relates to a drill bit, a drill bit for drilling a circular groove on the inner side wall of a sealing ring is disclosed, which comprises an upper clamp plate and a lower clamp plate which are fixedly arranged, the upper clamp plate is parallel to the lower clamp plate, a driving gear and a driven gear are clamped between the upper clamp plate and the lower clamp plate, the axes of the driving gear and the driven gear are parallel and vertical to the upper clamp plate, the driving gear is directly meshed with or indirectly transmitted to the driven gear, the upper clamp plate is provided with a first upper shaft hole which is coaxial with the driving gear, a driving shaft which is coaxially fixed with the driving gear is inserted into the first upper shaft hole, the upper end of the driving shaft is coaxially fixed with a drill chuck, the lower clamp plate is provided with a first lower shaft hole which is coaxial with the driven gear, a drill rod which is coaxially fixed with the driven gear is inserted into the first lower shaft hole, the lower end of the drill rod is provided with a cutting section with, the machining precision of the circular groove on the sealing ring of the product is improved.

Description

Drill bit for drilling circular groove on inner side wall of sealing ring

Technical Field

The utility model relates to a drill bit, in particular to drill bit of getting sealing ring inside wall circular slot.

Background

As shown in fig. 11, there is a sealing ring, generally made of graphite or silicon carbide, which includes a ring body 3, a fitting hole is coaxially disposed at the center of the ring body 3, a circular groove 31 recessed inwards and not penetrating the ring body 3 is disposed on the wall of the fitting hole, and a straight line of the axis of the circular groove 31 is perpendicular to and intersects a straight line of the axis of the ring body 3.

As shown in fig. 12, the bench drill 1 is a conventional device in the art, and its internal structure is prior art, so it will be described only briefly herein. The bench drill 1 includes a base 11, an arm 12 vertically fixed to an upper side of the base 11, a mounting table 13 fixed to an upper end of the arm 12 toward a side of the base 11, a stage 16 mounted on the arm 12 and located between the mounting table 13 and the base 11, a lifting mechanism 14 mounted below the mounting table 13, and a motor case 15.

The lifting mechanism 14 is a conventional one, and includes a rotating handle 141, and the rotating handle 141 can drive the motor box 15 to vertically lift up and down. A motor is arranged in the motor box 15, a vertical protective sleeve 151 is arranged at the bottom edge of the motor box 15, a motor shaft of the motor penetrates through the protective sleeve 151, and a drill chuck 152 is further fixed at the lower end of the motor shaft of the motor. The drill chuck 152 has a lower end to which a conventional drill rod 17 of a vertical column shape is coaxially held.

However, the circular groove 31 of the sealing ring is located inside the ring body 3 and the circular groove 31 does not penetrate through the ring body 3, so the ring body 3 is vertically erected and then fixed in an inclined manner for drilling. The resulting circular groove 31 is inclined, and the machining cannot reach the design state of the circular groove 31, so a drill for vertically drilling the circular groove 31 on the inner side wall of the ring body 3 is required.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a bore drill bit of getting sealing ring inside wall circular slot need not the slope ring body, directly bores and gets the processing circular slot, and the axle center place straight line of gained circular slot just intersects perpendicularly with the axle center of ring body, improves the machining precision of product sealing ring upper circular slot.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a bore drill bit of getting sealing ring inside wall circular slot, sets up punch holder and lower plate including fixed, the punch holder parallels with the lower plate, accompany drive gear and driven gear between punch holder and the lower plate, both axle centers of drive gear and driven gear parallel and perpendicular punch holder, drive gear and driven gear direct meshing or indirect transmission, the punch holder is opened has the first last shaft hole coaxial with drive gear, first last shaft hole inserts the drive shaft coaxial fixed with drive gear, the drive shaft upper end is coaxial fixed with the drill chuck, the lower plate is opened has the first shaft hole coaxial with driven gear, first shaft hole from the bottom insert have with the coaxial fixed drilling rod of driven gear, the drilling rod lower extreme is provided with the cutting section that has the edge of a knife.

By adopting the technical scheme, when the drill bit is used, the upper end of the driving shaft is inserted into and fixed with the drill chuck, and the ring body is fixed and sleeved outside the drill rod;

after the motor is started, the drill chuck is driven to rotate to drive the driving shaft and the driving gear to rotate, the driven gear and the drill rod are rotated through the transmission between the driving gear and the driven gear, and then the inner side wall of the ring body is drilled,

the axis of the drill rod is parallel to the axis of the drill chuck, but the horizontal positions are staggered, so that the circular groove is directly drilled without inclining the ring body, the straight line of the axis of the obtained circular groove is perpendicular to and intersected with the axis of the ring body, and the machining precision of the circular groove on the product sealing ring is improved.

The utility model discloses further set up to: the transmission gear comprises a transmission gear, wherein two sides of the outer side surface of the transmission gear are respectively meshed with a driving gear and a driven gear.

Through adopting above-mentioned technical scheme, drive gear is located between drive gear and the driven gear, and the horizontal interval of drill rod center between the increase drive shaft axle center increases then the distance of extension drill bit processing circular slot position along ring body axial to ring body terminal surface, and axial thickness is followed to the ring body that the increase drill bit can process, improves the practicality and the suitability of drill bit.

The utility model discloses further set up to: the transmission gear is meshed with a driving gear, the other transmission gear is meshed with a driven gear, two adjacent transmission gears are meshed, and the number of teeth of the two adjacent meshed transmission gears is different.

Through adopting above-mentioned technical scheme, change the drive gear of double-phase adjacent meshing, adjust its number of teeth, the rotation ratio of adjustment drill bit from this improves drilling rod torsional force or rotational speed to be applicable to the ring body processing of different materials, improve the practicality and the suitability of drill bit.

The utility model discloses further set up to: the upper clamping plate is provided with a second upper shaft hole coaxial with the driven gear, the drill rod comprises an upper positioning section coaxially arranged, and the upper positioning section is inserted into the second upper shaft hole.

By adopting the technical scheme, the upper positioning section is inserted into the second upper shaft hole, so that the drill rod is stabilized in rotation, the axial deflection of the drill rod during rotation is reduced, and the machining precision of the circular groove is improved.

The utility model discloses further set up to: the drilling rod is including the drive cooperation section of coaxial setting, driven gear is coaxial to run through to open has the driven tooth mounting hole, it is fixed with drive cooperation section grafting and spline fit that driven tooth mounting hole, the upper end of drive cooperation section is spacing with the lower bottom surface butt of punch holder, the upper end in shaft hole on the second is worn out to the upper end of going up the location section, just go up the upper end of location section can dismantle be fixed with the solid fixed ring with the punch holder upper surface butt.

By adopting the technical scheme, the drill rod is inserted between the upper clamping plate and the lower clamping plate from the lower direction of the first lower shaft hole, the driving matching section is in plug-in spline matching with the driven tooth mounting hole, the drill rod and the driven gear are synchronously fixed in a circumferential rotation manner, and meanwhile, the fixing ring is fixed at the upper end of the upper positioning section and is abutted against the upper surface of the upper clamping plate, so that the drill rod is prevented from falling off, and the drill rod is quickly mounted;

on the contrary, the drill rod can be taken out downwards from the first lower shaft hole by dismounting the fixing ring on the upper positioning section of the installed drill rod, so that the drill rod can be quickly dismounted;

when the drill rod is used, the lower end of the drill rod abuts against the inner side of the pressing ring body, the upper end of the drive matching section abuts against the lower bottom surface of the upper clamping plate, then the axial movement of the drill rod is limited, the drill rod is enabled to descend synchronously along with the downward pressing of the drill bit, and the drill rod is fixed and stable;

the quick installation and quick disassembly of the drill rod are realized, and the drill rod is convenient to replace

The utility model discloses further set up to: the lower clamping plate is provided with a second lower shaft hole coaxial with the driving gear, the driving shaft comprises a coaxial lower positioning section, and the lower positioning section is inserted into the second lower shaft hole.

Through adopting above-mentioned technical scheme, lower location section inserts in the second lower shaft, rotates the drive shaft and plays stabilizing effect, reduces the axle center deflection when the drive shaft rotates, improves output shaft transmission efficiency and transmission precision, improves the circular slot machining precision.

The utility model discloses further set up to: the drive shaft includes coaxial drive cooperation section, the coaxial drive gear mounting hole that is provided with of drive gear, it is fixed with drive cooperation section spline fit that drive gear mounting hole, the lower terminal surface of drive cooperation section and the upper surface looks butt of lower plate, the lower location section runs through shaft hole under the second, just the side of location section down be provided with the lower rand of lower plate lower bottom surface butt.

By adopting the technical scheme, the driving shaft is downwards inserted between the upper clamping plate and the lower clamping plate from the upper part of the first upper shaft hole, the driving matching section is in plug-in spline matching with the driving tooth mounting hole, the driving shaft and the driving gear are synchronously fixed in circumferential rotation, and meanwhile, the lower clamping ring is fixed at the lower end of the lower positioning section and is abutted against the lower bottom surface of the lower clamping plate, so that the driving shaft is prevented from being pulled out between the upper clamping plate and the lower clamping plate, and the drill rod is further quickly mounted;

on the contrary, the driving shaft can be axially pulled out from the first upper hole by disassembling the lower clamping ring on the lower positioning section for the installed driving shaft, so that the driving shaft can be quickly disassembled;

therefore, the driving shaft can be rapidly installed and detached, and the driving shaft can be conveniently replaced adaptively when the drill bit is installed on drill chucks with different sizes and specifications.

The utility model discloses further set up to: the drive shaft includes coaxial installation section, the first upper shaft hole of installation section from bottom to top, the side card of installation section is established and is fixed with the last rand with punch holder upper surface butt.

Through adopting above-mentioned technical scheme, go up the rand and on the rand is fixed in the drive shaft down to respectively the clamping press upper plate and the lower plate to the two sides that deviate from, when the drilling rod receives the power that the ring body gave the top or bores the vibration that takes the in-process to produce in the drill bit working process, restriction upper plate and the lower plate removal or bending dorsad improve the transmission precision between drive gear and the driven gear, in order to improve the machining precision of circular slot.

The utility model discloses further set up to: the lower plate upper surface is provided with the coaxial second constant head tank that is provided with outside the first shaft hole down, the lower plate upper surface is provided with the coaxial first constant head tank that is provided with outside the shaft hole under the second, the coaxial first ring edge that is provided with in bottom surface under the drive gear, the coaxial second ring edge that sets up in bottom surface under the driven gear, the second ring edge card goes into first constant head tank, first ring edge card goes into in the second constant head tank.

Through adopting above-mentioned technical scheme, when drive gear and driven gear installed in punch holder and lower clamp between, the second constant head tank is gone into along the card to the first ring of accessible, and first constant head tank is gone into along the card to first ring to this location drive gear and driven gear, the drive shaft and the bull stick of being convenient for from this insert, the drill bit equipment of being convenient for then.

To sum up, the utility model discloses following beneficial effect has:

the axis of the drill rod is parallel to the axis of the drill chuck, but the horizontal positions are staggered, so that the circular groove is directly drilled without inclining the ring body, the straight line of the axis of the obtained circular groove is perpendicular to and intersected with the axis of the ring body, and the machining precision of the circular groove on the product sealing ring is improved.

Drawings

FIG. 1 is a schematic view of a table drill and a drill bit;

FIG. 2 is an exploded view of the drill bit;

FIG. 3 is a schematic illustration of the positional arrangement when the drive gear is directly engaged with the drive gear;

FIG. 4 is a schematic view showing the positional arrangement when the driving gear and the transmission gear are indirectly transmitted through one transmission gear;

FIG. 5 is a schematic view of the positional arrangement when the drive gear and the transmission gear are indirectly transmitted through the plurality of transmission gears;

FIG. 6 is a cross-sectional view showing the internal structure of the drill bit;

FIG. 7 is an enlarged fragmentary view of FIG. 6 at A showing the first rim and second detent configuration;

FIG. 8 is an enlarged fragmentary view of FIG. 6 at B showing the second rim and first detent configuration;

FIG. 9 is a schematic view of a drill bit and bench drill installation;

FIG. 10 is an exploded view of a drill bit and bench drill installation;

FIG. 11 is a schematic view of the seal ring;

FIG. 12 is a schematic diagram of a prior art bench drill and drill bit.

Reference numerals: 1. bench drilling; 11. a pedestal; 12. a table arm; 13. an installation table; 14. a lifting mechanism; 141. rotating the handle; 15. a motor case; 151. a protective sleeve; 1511. a slot; 152. a drill chuck; 16. an object stage; 17. an existing drill pipe; 2. a drill bit; 21. an upper splint; 211. a first upper shaft hole; 212. a second upper shaft hole; 213. positioning the upper hole; 22. a lower splint; 221. a first lower shaft hole; 222. a second lower shaft hole; 223. positioning the lower hole; 224. a second positioning groove; 225. a first positioning groove; 23. a fixing member; 231. a connecting plate; 232. fixing the clamping plate; 2321. a fixing plate; 2321-1, fixing the gap; 2321-2, locating edge; 2321-3, fixing holes; 2322. a clamping plate; 2322-1, clamping gap; 2322-2, through holes; 2323. fixing the bolt; 24. a drive gear; 241. a drive tooth mounting hole; 2411. a drive spline groove; 242. a first annular rim; 25. a driven gear; 251. a driven tooth mounting hole; 2511. a driven spline groove; 252. a second rim; 26. a transmission gear; 261. positioning holes; 27. a drive shaft; 271. an installation section; 272. a drive mating section; 2721. a drive spline; 273. a lower positioning section; 274. an upper collar; 275. a lower retainer ring; 28. a drill stem; 281. an upper positioning section; 282. a driven mating section; 2821. a driven spline; 283. a cutting section; 284. a fixing ring; 29. a positioning column; 291. a positioning ring; 3. a ring body; 31. a circular groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in the attached figure 1, the drill bit for drilling the circular groove on the inner side wall of the sealing ring is arranged on a bench drill 1. The bench drill 1 is a conventional device in the art, and its internal structure is prior art and will be described only briefly herein. The bench drill 1 includes a base 11, an arm 12 vertically fixed to an upper side of the base 11, a mounting table 13 fixed to an upper end of the arm 12 toward a side of the base 11, a stage 16 mounted on the arm 12 and located between the mounting table 13 and the base 11, a lifting mechanism 14 mounted below the mounting table 13, and a motor case 15.

The lifting mechanism 14 is a conventional one, and includes a rotating handle 141, and the rotating handle 141 can drive the motor box 15 to vertically lift up and down. A motor is arranged in the motor box 15, a vertical protective sleeve 151 is arranged at the bottom edge of the motor box 15, a motor shaft of the motor penetrates through the protective sleeve 151, and a drill chuck 152 is further fixed at the lower end of the motor shaft of the motor. The drill chuck 152 is prior art and not the point of innovation of the present invention, and therefore its internal structure is not further described herein, and is used to vertically clamp the upper end of the fixed drill bit 2 or drill rod 28.

As shown in fig. 2, the drill 2 includes an upper plate 21, a lower plate 22, and a fixing member 23, wherein the upper plate 21 and the lower plate 22 are horizontally disposed, and the upper plate 21 is located above the lower plate 22 with a space between the upper plate 21 and the upper plate 21.

A driving gear 24, a driven gear 25 and a transmission gear 26 are further arranged between the upper clamping plate 21 and the lower clamping plate 22, the driving gear 24, the driven gear 25 and the transmission gear 26 are equal in height, and the spacing distance between the driving gear 24, the driven gear 25 and the transmission gear 26 is equal to that between the upper clamping plate 21 and the lower clamping plate 22.

As shown in fig. 3 to 5, the number of the driving gears 24 is one, the number of the driven gears 25 is one, the number of the transmission gears 26 can be determined according to actual conditions, and if the number of the transmission gears 26 is zero, the driving gears 24 and the transmission gears 26 are directly meshed; if the number of the transmission gears 26 is one, two sides of the transmission gears 26 are respectively meshed with the driving gear 24 and the driven gear 25, if the number of the transmission gears 26 is more than one, the transmission gears 26 are sequentially meshed, and the transmission gears 26 at two ends of the plurality of transmission gears 26 which are sequentially meshed are respectively meshed with the driving gear 24 and the driven gear 25, at this time, the transmission gears 26 can be selected to adjust the number of teeth of the two adjacent meshed transmission gears 26, so that the transmission ratio of the driving gear 24 and the driven gear 25 is changed, and a larger torsional force or rotating speed is obtained. The number of the transmission gears 26 is one in the present embodiment.

As shown in fig. 2, a driving tooth mounting hole 241 is coaxially provided through the center of the driving gear 24, and a driving spline groove 2411 is coaxially provided inside the driving tooth mounting hole 241. The driven gear 25 has a driven tooth mounting hole 251 coaxially passing through the center thereof, and a driven spline groove 2511 is coaxially provided inside the driven tooth mounting hole 251. The center of the transmission gear 26 is coaxially provided with a positioning hole 261.

The upper clamping plate 21 is provided with a first upper shaft hole 211, a second upper shaft hole 212 and a positioning upper hole 213, the lower clamping plate 22 is provided with a first lower shaft hole 221, a second lower shaft hole 222 and a positioning lower hole 223, wherein the first upper shaft hole 211 is coaxially aligned with the second lower shaft hole 222, and the diameter of the first upper shaft hole 211 is equal to that of the driving tooth mounting hole 241 and is larger than that of the second lower shaft hole 222; the second upper shaft hole 212 is coaxially aligned with the first lower shaft hole 221, the diameter of the second upper shaft hole 212 is smaller than that of the first lower shaft hole 221, and the diameter of the first lower shaft hole 221 is equal to that of the driven tooth mounting hole 251.

Meanwhile, the lower clamping plate 22 is coaxially provided with a second positioning slot 224 outside the first lower shaft hole 221, and a first positioning slot 225 outside the second lower shaft hole 222.

As shown in fig. 6 to 8, a first annular edge 242 is coaxially disposed on the lower bottom surface of the driving gear 24, and the first annular edge 242 can be snapped into the second positioning slot 224; the driven gear 25 is coaxially provided with a second ring edge 252 on the lower bottom surface, and the second ring edge 252 can be clamped into the first positioning groove 225.

As shown in fig. 2, the drill head 2 further comprises a drive shaft 27, a drill rod 28 and a positioning post 29. The driving shaft 27 includes, from top to bottom, a mounting section 271, a driving fitting section 272, and a lower positioning section 273, which are coaxially disposed, wherein a diameter of the lower positioning section 273 is equal to a diameter of the second lower shaft hole 222, a diameter of the driving fitting section 272 is equal to a diameter of the driving tooth mounting hole 241, and a driving spline 2721 matching with the driving spline groove 2411 is disposed on a side surface of the driving fitting section 272.

As shown in fig. 6, the driving shaft 27 is inserted into the upper and lower clamping plates 21 and 22 from the first upper shaft hole 211, and the lower positioning segment 273 is inserted into and passes through the lower end of the second lower shaft hole 222. The driving engagement section 272 is inserted into the driving tooth mounting hole 241 and fixed in spline fit therewith, such that the driving engagement section 272 is circumferentially and rotationally fixed with the driving gear 24, and the lower end of the driving engagement section 272 abuts against the upper surface of the lower clamp plate 22. The mounting section 271 penetrates through the first upper shaft hole 211, an upper clamping ring 274 is clamped on the side surface of the mounting section 271 penetrating through the outer side of the upper shaft hole, a lower clamping ring 275 is clamped on the side surface of the lower positioning section 273 penetrating through the outer side surface of the second lower shaft hole 222, the upper clamping ring 274 abuts against the upper surface of the upper clamping plate 21, the lower clamping ring 275 abuts against the lower surface of the lower clamping plate 22, and then the driving shaft 27 is fixed to axially move relative to the lower clamping plate 22.

As shown in fig. 2, the drill rod 28 includes, from top to bottom, an upper positioning section 281, a driven fitting section 282 and a cutting section 283, which are coaxially arranged, wherein the diameter of the driven fitting section 282 is equal to that of the first lower shaft hole 221, and a driven spline 2821 matched with the driven spline groove 2511 is provided on the side surface of the driven fitting section 282; the diameter of the upper positioning segment 281 is equal to the diameter of the second upper axial hole 212.

As shown in fig. 6, the drill rod 28 is inserted into the upper clamping plate 21 and the lower clamping plate 22 from the first lower shaft hole 221, the upper positioning section 281 is inserted into and penetrates through the lower end of the second lower shaft hole 222, a fixing ring 284 is clamped on the side surface of the upper positioning section 281 penetrating through the second lower shaft hole 222, and the fixing ring 284 abuts against the upper surface of the upper clamping plate 21. The driven fitting section 282 is inserted into the driven tooth mounting hole 251 and fixed in spline fit therewith, so that the driven fitting section 282 is circumferentially and rotationally fixed with the driven gear 25, and the lower end of the driven fitting section 282 abuts against the upper surface of the lower clamp plate 22. The cutting segment 283 is located below the lower clamping plate 22.

As shown in fig. 2 and fig. 6, the positioning column 29 is a column, and has a diameter equal to the diameters of the upper positioning hole 213 and the lower positioning hole 223, the positioning column 29 simultaneously penetrates through the upper positioning hole 213, the positioning hole 261 and the lower positioning hole 223, the upper end and the lower end of the positioning column 29 respectively penetrate through the upper clamping plate 21 and the lower clamping plate 22, the upper end and the lower end of the positioning column 29 are respectively clamped with a positioning ring 291, and the positioning rings 291 respectively abut against the upper surface of the upper clamping plate 21 and the lower bottom surface of the lower clamping plate 22.

As shown in fig. 9, the fixing member 23 includes a connection plate 231 and a fixing clip 232. The connecting plate 231 is a vertical plate, and one side of the connecting plate is fixed to the side wall of the same side of the upper clamping plate 21 and the lower clamping plate 22, and the fixing manner can be determined according to the actual situation, and is herein welded and fixed.

As shown in fig. 9 and 10, the fixing clamp plate 232 includes a fixing plate 2321, a clamping plate 2322 and a fixing bolt 2323, and the fixing plate 2321 and the clamping plate 2322 are horizontally disposed above the fixing clamp plate 21. One side of the fixing plate 2321, which faces away from the clamping plate 2322, is fixed to the connecting plate 231, where the fixing manner is welding, a semicircular fixing notch 2321-1 is vertically formed through one side of the fixing plate 2321, which faces the connecting plate 231, an inner side surface of the fixing notch 2321-1 is provided with a positioning edge 2321-2 along a circumferential direction thereof, and the positioning edge 2321-2 is semicircular when viewed vertically. And the fixing plate 2321 is provided with fixing holes 2321-3 at both sides of the fixing gap 2321-1, and the fixing holes 2321-3 are threaded holes matched with the fixing bolts 2323.

As shown in fig. 10, a semicircular clamping gap 2322-1 is vertically formed through one side of the clamping plate 2322 facing the fixing plate 2321, two through holes 2322-2 are horizontally formed through two sides of the clamping gap 2322-1 of the clamping plate 2322, and a fixing bolt 2323 can penetrate through the two through holes 2322-2 and be in threaded connection with the fixing hole 2321-3. When the fixing bolt 2323 is threadedly coupled to the fixing hole 2321-3 and presses the fixing plate 2321 and the clamping plate 2322, the fixing gap 2321-1 and the clamping gap 2322-1 are aligned and split into a circular shape.

As shown in fig. 9, the number of the fixing clamps 232 may be determined according to actual conditions, and the number of the fixing clamps 232 is two, and the fixing clamps are arranged in parallel up and down.

As shown in fig. 1 and 10, the outer side surface of the protection sleeve 151 facing the side of the arm 12, i.e., the side facing away from the working position of the worker, is provided with slots 1511, and the number of the slots 1511 is equal to the number of the fixing clamps 232, and the slots are vertically distributed up and down. The slot 1511 is circumferentially disposed along the protective case 151, has a semicircular vertical projection, and is matched with the positioning edge 2321-2.

The utility model discloses a theory of operation:

when the drill bit 2 is installed, the installation end is inserted into the drill chuck 152, the positioning edge 2321-2 is inserted into the insertion groove 1511, so that the position of the connecting plate 231 and the orientation of the fixing hole 2321-3 are positioned, the clamping plate 2322 and the fixing bolt 2323 are installed on the fixing plate 2321, so that the fixing protective sleeve 151 is clamped and fixed by the fixing clamping plate 232, the positions of the connecting plate 231 and the protective sleeve 151 are positioned, the upper clamping plate 21 and the lower clamping plate 22 are fixed, and meanwhile, the positioning edge 2321-2 abuts against the clamping groove to further limit the position of the fixing plate 2321, so that the upper clamping plate 21 and the lower clamping plate 22 are prevented from; finally, the drill chuck 152 is adjusted to clamp the fixed mounting section 271, and the drill chuck 152 is driven by the motor to rotate, so as to drive the driving shaft 27 to rotate.

After the motor is started, the drill chuck 152 is driven to rotate, the driving shaft 27 and the driving gear 24 are driven to rotate, the driving gear 24 and the driven gear 25 are driven to rotate, the driven gear 25 and the drill rod 28 are driven to rotate, and then the inner side wall of the ring body 3 is drilled.

Therefore, the axis of the drill rod 28 is parallel to the axis of the drill chuck 152, but the horizontal positions are staggered, the circular groove 31 is directly drilled and machined without inclining the ring body 3, the straight line of the axis of the obtained circular groove 31 is perpendicular to and intersected with the axis of the ring body 3, and the machining precision of the circular groove 31 on the product sealing ring is improved.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims (9)

1. The drill bit for drilling the circular groove on the inner side wall of the sealing ring is characterized by comprising an upper clamping plate (21) and a lower clamping plate (22) which are fixedly arranged, wherein the upper clamping plate (21) is parallel to the lower clamping plate (22), a driving gear (24) and a driven gear (25) are clamped between the upper clamping plate (21) and the lower clamping plate (22), the axes of the driving gear (24) and the driven gear (25) are parallel to each other and are perpendicular to the upper clamping plate (21), the driving gear (24) is directly meshed with or indirectly transmitted to the driven gear (25), a first upper shaft hole (211) coaxial with the driving gear (24) is formed in the upper clamping plate (21), a driving shaft (27) coaxially fixed with the driving gear (24) is inserted into the first upper shaft hole (211), the upper end of the driving shaft (27) is coaxially fixed with a drill chuck (152), and a first lower shaft hole (221) coaxial with the driven gear (25) is formed in the lower clamping, a drill rod (28) coaxially fixed with the driven gear (25) is inserted into the first lower shaft hole (221) from bottom to top, and a cutting section (283) with a knife edge is arranged at the lower end of the drill rod (28).

2. The drill bit for drilling the circular groove on the inner side wall of the sealing ring is characterized by comprising a transmission gear (26), wherein two sides of the outer side surface of the transmission gear (26) are respectively meshed with a driving gear (24) and a driven gear (25).

3. The drill bit for drilling the circular groove on the inner side wall of the sealing ring is characterized by comprising at least two transmission gears (26), wherein one transmission gear (26) is meshed with a driving gear (24), the other transmission gear (26) is meshed with a driven gear (25), two adjacent transmission gears (26) are meshed, and the number of teeth of the two adjacent meshed transmission gears (26) is different.

4. The drill bit for drilling the circular groove on the inner side wall of the sealing ring is characterized in that the upper clamping plate (21) is provided with a second upper shaft hole (212) coaxial with the driven gear (25), the drill rod (28) comprises an upper positioning section (281) which is coaxially arranged, and the upper positioning section (281) is inserted into the second upper shaft hole (212).

5. The drill bit for drilling the circular groove on the inner side wall of the sealing ring is characterized in that the drill rod (28) comprises a driving matching section (272) which is coaxially arranged, the driven gear (25) coaxially penetrates through a driven tooth mounting hole (251), the driven tooth mounting hole (251) is inserted into the driving matching section (272) and is fixed in a spline matching mode, the upper end of the driving matching section (272) is abutted to the lower bottom surface of the upper clamping plate (21) for limiting, the upper end of the upper positioning section (281) penetrates out of the upper end of the second upper shaft hole (212), and a fixing ring (284) abutted to the upper surface of the upper clamping plate (21) is detachably fixed at the upper end of the upper positioning section (281).

6. The drill bit for drilling the circular groove on the inner side wall of the sealing ring is characterized in that the lower clamping plate (22) is provided with a second lower shaft hole (222) coaxial with the driving gear (24), the driving shaft (27) comprises a lower positioning section (273), and the lower positioning section (273) is inserted into the second lower shaft hole (222).

7. The drill bit for drilling the circular groove on the inner side wall of the sealing ring is characterized in that the driving shaft (27) comprises a coaxial driving matching section (272), the driving gear (24) is coaxially provided with a driving tooth mounting hole (241), the driving tooth mounting hole (241) is fixed with the driving matching section (272) in a spline fit mode, the lower positioning section (273) penetrates through the second lower shaft hole (222), and the side face of the lower positioning section (273) is provided with a lower clamping ring (275) abutted to the lower bottom face of the lower clamping plate (22).

8. The drill bit for drilling the circular groove on the inner side wall of the sealing ring is characterized in that the driving shaft (27) comprises a coaxial mounting section (271), the mounting section (271) penetrates out of the first upper shaft hole (211) from bottom to top, and an upper clamping ring (274) which is abutted to the upper surface of the upper clamping plate (21) is clamped and fixed on the side surface of the mounting section (271).

9. The drill bit for drilling the circular groove on the inner side wall of the sealing ring is characterized in that a second positioning groove (224) is coaxially arranged outside a first lower shaft hole (221) on the upper surface of the lower clamping plate (22), a first positioning groove (225) is coaxially arranged outside a second lower shaft hole (222) on the upper surface of the lower clamping plate (22), a first ring edge (242) is coaxially arranged on the lower bottom surface of the driving gear (24), a second ring edge (252) is coaxially arranged on the lower bottom surface of the driven gear (25), the second ring edge (252) is clamped into the first positioning groove (225), and the first ring edge (242) is clamped into the second positioning groove (224).

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