CN115351557B

CN115351557B - Crankcase stator face processing equipment

Info

Publication number: CN115351557B
Application number: CN202211167744.3A
Authority: CN
Inventors: 关晓杰
Original assignee: Jiaxing Lifeng Machinery Manufacturing Co ltd
Current assignee: Jiaxing Lifeng Machinery Manufacturing Co ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2023-08-22
Anticipated expiration: 2042-09-23
Also published as: CN115351557A

Abstract

The application discloses a crankcase stator surface machining device which comprises a base, wherein a clamp for clamping a crankcase is arranged on the base, a machining mechanism for drilling and tapping the crankcase is arranged on the base, the machining mechanism comprises a mounting seat which is arranged above the base in a sliding manner, four drills for drilling the crankcase and a driving motor for driving the drills to rotate are arranged on the mounting seat, an adjusting seat is connected onto the mounting seat in a rotating manner, a tap corresponding to the drill is arranged on the adjusting seat, and a tool changing mechanism for facilitating the replacement of the drill into the tap is arranged on the mounting seat. The application has the effect of being convenient for effectively finding the position of the positive hole.

Description

Crankcase stator face processing equipment

Technical Field

The application relates to the field of crank cases, in particular to a crank case stator surface machining device.

Background

The crankcase is an important component in the compressor, and the crankcase of the compressor is a box-type part, and the appearance is generally not regular, and mainly comprises a cylinder surface and a stator surface.

Referring to fig. 1, a schematic structure of a compressor crankcase 1 is mainly composed of a stator surface 2 and a cylinder surface 3, the cylinder surface 3 is arranged at the edge of the stator surface 2 and is perpendicular to the stator surface 2, a positioning shaft 4 is arranged on the stator surface 2, a shaft hole penetrating through the positioning shaft and the stator surface 2 is arranged on the positioning shaft 4, four bosses 5 are arranged on the outer side of the shaft, the four bosses 5 are positioned at four corners of the positioning shaft 4, and a cylinder hole penetrating through the cylinder surface 3 is arranged on the cylinder surface 3. During the compressor machining process, the boss 5 needs to be drilled first, and then threads are machined in the hole for later assembly.

In the process of realizing the application, the inventor finds that at least the following problems exist in the technology, namely, in the processing process, the boss on the stator surface is firstly drilled and then tapped, but the position of a hole cannot be effectively aligned in the tapping process, and the problem of tap fracture is extremely easy to generate in the tapping process, so that the processing efficiency is influenced.

Disclosure of Invention

In order to facilitate effective alignment of the positive hole location, the application provides crankcase stator face processing equipment.

The application provides a crankcase stator surface processing device which adopts the following technical scheme:

the utility model provides a crankcase stator face processing equipment, includes the base, be provided with the anchor clamps that are used for the centre gripping crankcase on the base, be provided with the processing agency that is used for drilling and tapping the crankcase on the base, processing agency is including sliding the mount pad that sets up the base top, there are four drill bits and the pivoted driving motor of driving bit to the crankcase of drilling on the mount pad, it is connected with the regulation seat to rotate on the mount pad, be provided with the screw tap that corresponds with the drill bit on the regulation seat, be provided with the tool changing mechanism that the drill bit of being convenient for changes into the screw tap on the mount pad.

Through adopting above-mentioned technical scheme, the crankcase is fixed on anchor clamps, and driving motor drives the drill bit and drills to the arch of crankcase, and after the drilling was accomplished, the regulating seat rotated for the mount pad, under the effect of tool changing mechanism, trades the drill bit into the screw tap, because the screw tap has taken up the position of original drill bit to be convenient for fix a position.

Optionally, the mount pad is discoid, the driving motor output shaft is coaxial with the mount pad, set up the mounting groove on the mount pad, driving motor fixes in the mounting groove, set up the transmission groove of connecting drill bit and mounting groove on the mount pad, the transmission inslot rotation is connected with the driving medium, be provided with the installing frame in the transmission groove, driving medium both ends are fixed with drive bevel gear, be fixed with the drive bevel gear meshing of driving medium one end on the driving motor, the drive bevel gear that the driving medium deviates from driving motor one end rotates to be connected in the installing frame, and the rotation of installing frame is connected with the driven bevel gear with driving medium other end drive bevel gear meshing, set up the vertical connecting groove that runs through driven bevel gear on the driven bevel gear, drill bit or tap can dismantle the connection on corresponding driven bevel gear's connecting groove.

Through adopting above-mentioned technical scheme, driving motor drives drive bevel gear and rotates, and drive bevel gear drives drive bevel gear and driving medium and rotates, and the drive bevel gear of driving medium opposite side drives driven bevel gear and rotates, and driven bevel gear drives drill bit or screw tap and rotates to be convenient for carry out drilling or tapping to the crankcase.

Optionally, the regulating seat is last to have offered the adjustment tank that a plurality of drill bits correspond, the screw tap sets up in the adjustment tank that corresponds, tool changing mechanism is fixed with the coaxial driven ring gear of mount pad including fixing at the rotation motor of mount pad lateral wall on the regulating seat, be fixed with the drive gear with driven ring gear meshing on the rotation motor, drill bit and screw tap up end all coaxial are fixed with the connecting rod, the connecting tank is the ladder groove, be fixed with the joint in the connecting tank and along with driven bevel gear pivoted joint piece on the connecting rod for the butt arch on the drill bit or the screw tap of processing part supports tightly at the regulating seat lower terminal surface.

Through adopting above-mentioned technical scheme, rotating motor drives drive gear and rotates, and drive gear drives driven ring gear and rotates to drive the regulation seat and rotate, make the regulation seat support tightly at the up end of drill bit or screw tap, thereby realize the fixed connection of drill bit or screw tap, the joint piece joint is in the spread groove, drive motor drives drive bevel gear and rotates, thereby makes the screw tap or the drill bit of connecting on driven bevel gear rotate, is convenient for process the spare part.

Optionally, the connecting rod up end is fixed with the butt piece, the internally mounted of installing frame has the butt spring that promotes butt piece upward movement, the butt piece up end is formed with smooth butt arch, the butt arch is upwards protruding towards the center by all around, the butt cambered surface has been seted up to one of them lateral wall of adjustment tank, the butt cambered surface butt is protruding and is being connected to driven bevel gear at pivoted in-process promotion drill bit or screw tap in the butt.

Through adopting above-mentioned technical scheme, when adjusting groove and transmission groove alignment, under the effect of butt spring, promote tap or drill bit upward movement, be convenient for the dismantlement of drill bit or tap.

Optionally, the adjustment tank extends along the mount pad is radial, the driving medium includes a plurality of telescopic cylinders that cup joint together and synchronous rotation, the mount pad bottom is provided with the spacing subassembly that is used for preventing the driving medium is flexible, be provided with on the installing frame and drive the top and correspond the synchronous along radial movement's of screw tap or drill bit synchronization subassembly.

By adopting the technical scheme, the length of the transmission part can be adjusted so as to adjust the position relation of four drills and meet the requirements of crank cases with different sizes.

Optionally, spacing subassembly includes coaxial and rotates the spacing ring of connecting terminal surface under the mount pad, is located the telescopic cylinder that is close to on the mount pad and is the outermost telescopic cylinder, is fixed with the gag lever post on the telescopic cylinder of the outermost side, the arc spacing groove has been seted up on the spacing ring, the gag lever post slides the joint in corresponding spacing inslot, and the spacing ring rotates in-process, the gag lever post slides in the spacing groove, offer the groove of stepping down that is used for accomodating drill bit or screw tap on the spacing ring, the groove of stepping down is the arc wall and prevents that the transmission from shortening in-process, drill bit or screw tap from bumping the spacing ring, be provided with on the spacing ring and prevent spacing ring pivoted locating part.

Through adopting above-mentioned technical scheme, the spacing ring rotates, and the gag lever post slides in the spacing inslot to drive the extension of driving medium or shorten, the setting of the groove of stepping down, be convenient for screw tap or drill bit slide in the groove of stepping down, prevent to shorten the in-process at the driving medium, screw tap or drill bit and spacing ring appear interfering.

Optionally, the locating part is the spacing bolt of threaded connection on the spacing ring, spacing bolt tip supports tightly at the mount pad lower surface to prevent the spacing ring rotation.

Through adopting above-mentioned technical scheme, after driving medium length adjustment, the rotatable limit bolt of staff makes limit bolt support tightly at the mount pad lower surface, prevents that the spacing ring from rotating for the mount pad.

Optionally, circular and with the coaxial storage tank of mount pad has been seted up to the mount pad up end, the mount pad up end flushes with storage tank bottom wall, synchronous subassembly is including setting up two shrink rings on the mount pad, two a plurality of mount pads are connected to the shrink ring and coaxial with the mount pad, the screw tap sets up two in the shrink ring and when shrink ring changes, drive screw tap along mount pad radial motion.

Through adopting above-mentioned technical scheme, the in-process that the driving medium was prolonged or was shortened, shrink ring along with changing the shape, guarantees that the screw tap is located the circle of same diameter size all the time with the drill bit all the time, is convenient for replace the drill bit with the screw tap.

In summary, the present application includes at least one of the following beneficial technical effects:

1. after drilling of the drill bit is completed, the adjusting seat rotates, the drill bit is separated from the driven bevel gear under the action of the abutting spring, after the drill bit is taken off, the adjusting seat is continuously rotated, the screw tap falls into the driven bevel gear, the adjusting seat is continuously rotated, the adjusting seat is pressed by the screw tap to move downwards until the upper end face of the connecting rod abuts against the lower end face of the adjusting seat, and at the moment, the clamping block is clamped in the connecting groove, so that tapping is conveniently carried out on the position of the drill hole;

2. the transmission piece comprises a plurality of telescopic cylinders which are sleeved together, so that the positions of the four drills can be conveniently adjusted, and the sizes of different parts can be met.

Drawings

Fig. 1 is a schematic view of the structure of a crankcase.

Fig. 2 is a schematic overall structure of an embodiment of the present application.

Fig. 3 is a schematic view of the bottom structure of the mount.

Fig. 4 is a schematic diagram of a connection structure of a drive bevel gear and a transmission bevel gear.

Fig. 5 is a schematic diagram of a connection structure of a rotary bevel gear and a driven bevel gear.

Fig. 6 is a schematic structural view of the adjusting seat.

Fig. 7 is a schematic view of a connection structure of the stop collar on the mounting base.

Fig. 8 is a top view of the mount.

Reference numerals illustrate:

1. a crankcase; 2. a stator face; 3. a cylinder surface; 4. positioning a shaft; 5. a boss; 6. a base; 7. a support base; 8. a clamping groove; 9. clamping a lead screw; 10. a clamping block; 11. clamping the motor; 12. a bracket; 13. a mounting base; 14. a connecting block; 15. an adjusting seat; 16. a mounting groove; 17. a transmission groove; 18. a transmission member; 19. a mounting frame; 20. a drive bevel gear; 21. driving a bevel gear; 22. a driven bevel gear; 23. an adjustment tank; 24. a rotating motor; 25. a driven toothed ring; 26. a drive gear; 27. a connecting rod; 28. a connecting groove; 29. a clamping block; 30. an abutment block; 31. abutting against the spring; 32. the abutting bulge; 33. abutting the cambered surface; 34. a limiting ring; 35. a limit rod; 36. a limit groove; 37. a relief groove; 38. a limit bolt; 39. a storage groove; 40. a shrink ring; 41. and driving the motor.

Detailed Description

The application is described in further detail below with reference to fig. 1-8.

The embodiment of the application discloses a crankcase stator surface processing device.

Referring to fig. 1 and 2, the crankcase 1 drilling and tapping device comprises a base 6 which is fixed on the ground and is horizontally arranged, a clamp for clamping the crankcase 1 is arranged on the base 6, and a processing mechanism for drilling and tapping the crankcase 1 is arranged on the base 6.

Referring to fig. 1 and 2, the fixture comprises a supporting seat 7, a clamping groove 8 is formed in the upper surface of the supporting seat 7, a clamping screw rod 9 is rotationally connected in the clamping groove 8, threads on the outer wall of the clamping screw rod 9 rotate from the middle to two ends oppositely, two clamping blocks 10 are slidably arranged in the clamping groove 8, the two clamping blocks 10 are symmetrically arranged on the clamping screw rod 9, the clamping screw rod 9 penetrates through the clamping blocks 10 and is in threaded connection with the clamping blocks 10, a clamping motor 11 is fixed in the clamping groove 8, and an output shaft of the clamping motor 11 is fixedly connected with the clamping screw rod 9.

The clamping motor 11 drives the clamping screw rod 9 to rotate, so that the two clamping blocks 10 are driven to move towards opposite directions, and the parts can be conveniently assembled and disassembled.

Referring to fig. 2, 3 and 4, a support 12 arranged vertically is fixed on the base 6, a lifting groove is formed in the side wall of the support 12 along the height direction, a lifting screw arranged vertically is rotationally connected in the lifting groove, a lifting motor is fixed at the bottom of the lifting groove, and an output shaft of the lifting motor is coaxially and fixedly connected with the lifting screw. The processing mechanism includes to slide and set up mount pad 13 on the support 12, is provided with four drills and the pivoted driving motor 41 of driving the drill bit of drilling crankcase 1 on the mount pad 13, and the axis of mount pad 13 bit is the disc of vertical setting, and the mount pad 13 lateral wall is fixed with connecting block 14, and connecting block 14 slides and sets up in the lift inslot, connecting block 14 lateral wall and lift inslot inside wall butt, and the lift lead screw runs through connecting block 14 and with connecting block 14 threaded connection.

The lifting motor drives the lifting screw to rotate, so that the connecting block 14 which is in threaded connection with the lifting screw drives the mounting seat 13 to move in the vertical direction.

Referring to fig. 2 and 3, an adjusting seat 15 is rotatably connected to an upper end surface of the mounting seat 13, a tap corresponding to the drill bit is arranged in the adjusting seat 15, and a tool changing mechanism for facilitating replacement of the drill bit into the tap is arranged on the mounting seat 13.

Referring to fig. 3, 4 and 5, a mounting groove 16 is formed in a mounting seat 13, a driving motor 41 is fixed in the mounting groove 16, a driving groove 17 for connecting a drill bit and the mounting groove 16 is formed in the mounting seat 13, a driving piece 18 is rotationally connected in the driving groove 17, a mounting frame 19 is arranged on one side, away from the driving motor 41, of the driving groove 17, driving bevel gears 20 are coaxially fixed at two ends of the driving piece 18, driving bevel gears 21 which are meshed with the driving bevel gears 20 at one ends of the four driving pieces 18 are coaxially fixed on the driving motor 41, the driving bevel gears 20 at one ends, away from the driving motor 41, of the driving piece 18 are rotationally connected in the mounting frame 19, a driven bevel gear 22 meshed with the driving bevel gears 20 is rotationally connected in the mounting frame 19, a connecting groove 28 penetrating the driven bevel gear 22 is coaxially formed in the driving bevel gear 22, and the drill bit or the tap is detachably connected to the connecting groove 28 of the corresponding driven bevel gear 22.

The driving motor 41 drives the driving bevel gear 21 to rotate, the driving bevel gear 21 drives the transmission bevel gear 20 and the transmission piece 18 to rotate, and the transmission bevel gear 20 on the transmission piece 18 drives the driven bevel gear 22 to rotate, so that a drill bit or a tap can process parts.

Referring to fig. 2, 5 and 6, the adjusting seat 15 is provided with a plurality of adjusting grooves 23 corresponding to the drill bits, the tap is arranged in the corresponding adjusting groove 23, the tool changing mechanism comprises a rotating motor 24 fixed on the side wall of the mounting seat 13, a driven toothed ring 25 coaxial with the mounting seat 13 is fixed on the adjusting seat 15, a driving gear 26 meshed with the driven toothed ring 25 is fixed on the rotating motor 24, connecting rods 27 are coaxially fixed on the upper end surfaces of the drill bits and the tap, the connecting grooves 28 are stepped grooves, clamping blocks 29 clamped in the connecting grooves 28 are fixed on the connecting rods 27, and the cross section of each clamping block 29 is a regular polygon matched with the stepped grooves, so that the driving bevel gear 20 can drive the tap or the drill bit to synchronously rotate.

Referring to fig. 5, 6 and 7, an abutment block 30 is fixed on the upper end surface of the connecting rod 27, an abutment spring 31 pushing the abutment block 30 to move upwards is fixed in the mounting frame 19, a smooth abutment protrusion 32 is formed on the upper end surface of the abutment block 30, the abutment protrusion 32 protrudes upwards from the periphery towards the center, an abutment cambered surface 33 is formed on one side wall of the adjusting groove 23, the abutment cambered surface 33 inclines downwards from top to bottom along the periphery of the mounting seat 13, the upper end of the abutment protrusion 32 abuts on the abutment cambered surface 33, when the adjusting seat 15 rotates, the connecting rod 27 is pushed to move downwards under the guiding action of the abutment cambered surface 33, so that the clamping block 29 is clamped into the stepped groove, and when the clamping block 29 abuts against the bottom wall of the stepped groove, the abutment protrusion 32 abuts against the lower end surface of the adjusting seat 15, thereby facilitating the rotation of the driven bevel gear 22.

Referring to fig. 5 and 6, the adjusting groove 23 extends radially along the mounting seat 13, the transmission member 18 includes a plurality of telescopic cylinders sleeved together and rotated synchronously, the transmission member 18 includes a plurality of telescopic cylinders sleeved together, the telescopic cylinder with the largest diameter is located at one end close to the drill bit, the positioning block is fixed on the outer side wall of the telescopic cylinder located at the inner side, and the positioning groove for clamping the corresponding positioning block is formed in the inner side wall of the telescopic cylinder located at the outer side along the length direction of the positioning block, so that the transmission member 18 can rotate synchronously in the telescopic process.

Referring to fig. 5 and 7, the bottom of the mounting seat 13 is provided with a limiting component for preventing the transmission piece 18 from telescoping, the limiting component comprises a limiting ring 34 which is coaxial and rotationally connected to the lower end face of the mounting seat 13, a limiting groove 36 is formed in the outer side wall of the limiting ring 34, the limiting groove 36 is an arc groove and penetrates the limiting ring 34 along the axis direction of the mounting seat 13, a limiting rod 35 which is vertically arranged is fixed on the outer wall of the telescopic cylinder close to the position of the mounting frame 19, the limiting rod 35 slides in the lower limiting groove 36, and when the limiting ring 34 rotates, the limiting rod 35 is driven to slide in the limiting groove 36, so that the transmission piece 18 is driven to stretch. The limiting ring 34 is provided with a yielding groove 37 for accommodating a drill bit or a tap, the yielding groove 37 is an arc-shaped groove, the yielding groove 37 penetrates through the limiting ring 34 along the axis of the limiting ring 34, when the limiting rod 35 slides in the limiting groove 36, and when the transmission piece 18 is shortened, the drill bit or the tap of the limiting rod 35 enters the corresponding yielding groove 37, so that the drill bit or the tap is prevented from bumping into the limiting ring 34. The limiting ring 34 is provided with a limiting piece for preventing the limiting ring 34 from rotating, the limiting piece is a limiting bolt 38 which is connected to the limiting ring 34 in a threaded mode, the limiting bolt 38 is arranged vertically, and the upper end face of the limiting bolt 38 abuts against the lower surface of the mounting seat 13 and prevents the limiting ring 34 from rotating.

Referring to fig. 7 and 8, a synchronizing assembly for driving the corresponding tap or drill above to synchronously move in the radial direction is provided on the mounting frame 19. The circular containing groove 39 coaxial with the mounting seat 13 is formed in the upper end face of the mounting seat 13, the upper end face of the mounting frame 19 is flush with the bottom wall of the containing groove 39, the synchronous assembly comprises two shrinkage rings 40 arranged on the mounting frame 19, and the shrinkage rings 40 can be used as dual-purpose bracelets for changing a ring into a bracelet and stretching through online shopping.

The implementation principle of the crankcase stator surface processing equipment provided by the embodiment of the application is as follows: the drill bit drills crankcase 1, and after the drilling is accomplished, adjusting seat 15 rotates, makes the drill bit just to adjusting slot 23, takes off the drill bit, continues to rotate adjusting seat 15, makes the screw tap rotate the spread groove 28 top to fall to in the spread groove 28, rotates adjusting seat 15, makes the screw tap move downwards, in the spread groove 28 on the joint piece 29 joint driven bevel gear 22 on the screw tap to be convenient for carry out the tapping to the drilling.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. The utility model provides a crankcase stator face processing equipment, includes base (6), be provided with the anchor clamps that are used for centre gripping crankcase (1) on base (6), be provided with the processing agency that is used for drilling and tapping crankcase (1) on base (6), its characterized in that: the processing mechanism comprises a mounting seat (13) arranged above a base (6) in a sliding manner, four drill bits for drilling a crankcase (1) and a driving motor (41) for driving the drill bits to rotate are arranged on the mounting seat (13), an adjusting seat (15) is rotationally connected to the mounting seat (13), a tap corresponding to the drill bits is arranged on the adjusting seat (15), and a cutter changing mechanism for facilitating replacement of the drill bits into the tap is arranged on the mounting seat (13); the automatic drilling machine is characterized in that the mounting seat (13) is disc-shaped, an output shaft of the driving motor (41) is coaxial with the mounting seat (13), a mounting groove (16) is formed in the mounting seat (13), the driving motor (41) is fixed in the mounting groove (16), a transmission groove (17) for connecting a drill bit and the mounting groove (16) is formed in the mounting seat (13), a transmission piece (18) is rotationally connected in the transmission groove (17), a mounting frame (19) is arranged in the transmission groove (17), transmission bevel gears (20) are fixed at two ends of the transmission piece (18), a driving bevel gear (21) meshed with the transmission bevel gear (20) at one end of the transmission piece (18) is fixed on the driving motor (41), the transmission bevel gear (20) at one end of the transmission piece (18) deviating from the driving motor (41) is rotationally connected in the mounting frame (19), a driven bevel gear (22) meshed with the transmission bevel gear (20) at the other end of the transmission piece (18) is rotationally connected, a driven bevel gear (22) is vertically arranged on the driven bevel gear (22), and the driven bevel gear (22) is correspondingly connected with the drill bit (28) through the corresponding to the driven bevel gear (28); the automatic cutter changing device is characterized in that a plurality of adjusting grooves (23) corresponding to the drill bits are formed in the adjusting seat (15), the screw taps are arranged in the corresponding adjusting grooves (23), the cutter changing mechanism comprises a rotating motor (24) fixed on the side wall of the mounting seat (13), a driven toothed ring (25) coaxial with the mounting seat (13) is fixed on the adjusting seat (15), a driving gear (26) meshed with the driven toothed ring (25) is fixed on the rotating motor (24), connecting rods (27) are coaxially fixed on the upper end surfaces of the drill bits and the screw taps, the connecting grooves (28) are stepped grooves, and clamping blocks (29) which are clamped in the connecting grooves (28) and rotate along with the driven bevel gears (22) are fixed on the connecting rods (27), and abutting protrusions (32) on the drill bits or the screw taps for machining parts abut against the lower end surfaces of the adjusting seat (15); an abutting block (30) is fixed on the upper end face of the connecting rod (27), an abutting spring (31) pushing the abutting block (30) to move upwards is fixed in the mounting frame (19), a smooth abutting protrusion (32) is formed on the upper end face of the abutting block (30), the abutting protrusion (32) protrudes upwards from the periphery to the center, an abutting cambered surface (33) is formed on one side wall of the adjusting groove (23), the abutting cambered surface (33) abuts against the abutting protrusion (32) and pushes a drill bit or a tap to be connected into the driven bevel gear (22) in the rotating process; the adjusting groove (23) radially extends along the mounting seat (13), the transmission piece (18) comprises a plurality of telescopic cylinders which are sleeved together and synchronously rotate, a limiting component used for preventing the transmission piece (18) from stretching out and drawing back is arranged at the bottom of the mounting seat (13), and a synchronous component used for driving the screw tap or the drill bit corresponding to the upper part to synchronously move along the radial direction is arranged on the mounting frame (19).

2. A crankcase stator face machining apparatus as claimed in claim 1 wherein: the limiting assembly comprises a limiting ring (34) which is coaxial and rotationally connected to the lower end face of the mounting seat (13), a limiting rod (35) is fixed to the telescopic cylinder which is located on the mounting frame (19) and is the outermost telescopic cylinder, an arc-shaped limiting groove (36) is formed in the limiting ring (34), the limiting rod (35) is slidably clamped in the corresponding limiting groove (36), the limiting ring (34) slides in the limiting groove (36) in the rotating process, a yielding groove (37) for accommodating a drill bit or a screw tap is formed in the limiting ring (34), the yielding groove (37) is an arc-shaped groove and is used for preventing a transmission part (18) from being shortened in the process, the drill bit or the screw tap from bumping into the limiting ring (34), and a limiting part for preventing the limiting ring (34) from rotating is arranged on the limiting ring (34).

3. A crankcase stator face machining apparatus as claimed in claim 2, wherein: the limiting piece is a limiting bolt (38) which is connected to the limiting ring (34) in a threaded mode, and the end portion of the limiting bolt (38) abuts against the lower surface of the mounting seat (13) and prevents the limiting ring (34) from rotating.

4. A crankcase stator face machining apparatus as claimed in claim 3 wherein: circular and with mount pad (13) coaxial storage groove (39) have been seted up to mount pad (13) up end, mount pad (19) up end flushes with storage groove (39) diapire, synchronous subassembly is including setting up two shrink rings (40) on mount pad (19), two shrink rings (40) connect a plurality of mount pads (19) and with mount pad (13) coaxial, the screw tap setting is in two in shrink rings (40) and when shrink rings (40) change, drive screw tap along mount pad (13) radial motion.