CN210305915U - Anti-extrusion device of double-pendulum milling head - Google Patents

Abstract

The utility model provides a double pendulum cutter head prevent extrusion device belongs to machine tool machining technical field. The extrusion-proof device solves the technical problem that how the extrusion-proof device of the existing double-pendulum milling head eliminates the influence of long-time heating of a machine on the processing precision. This double pendulum cutter head prevent extrusion device, double pendulum cutter head includes the unit, lower unit and cutter head, it includes casing and C axle motor to go up the unit, the stator of C axle motor is fixed in last casing, wear to be equipped with the rotor on the stator of C axle motor, the top cover that lies in C axle motor on the rotor is equipped with C axle encoder, prevent that extrusion device sets up between C axle motor and C axle encoder, prevent that extrusion device includes swivel bearing and bearing housing, the inner circle cover of bearing is established on the rotor, be distributed with the elastic component between bearing housing and the C axle motor, the bearing housing can remove along the axis direction of bearing housing, the clearance has between the bottom surface of bearing housing and C axle encoder. The utility model has the advantages of can eliminate the long-time influence to the machining precision that generates heat of machine.

Description

Anti-extrusion device of double-pendulum milling head

Technical Field

The utility model belongs to the machine tool machining field relates to a double pendulum cutter head, especially a double pendulum cutter head prevent extrusion device.

Background

In the manufacturing process of large-scale precise machinery, precise machining is generally carried out through a five-axis linkage numerical control machine tool.

For example, in chinese patent document [ issued publication No.: CN201900498U ] the double pendulum milling head driven by the ac permanent magnet synchronous inner rotor torque motor is divided into an upper part and a lower part by an end-toothed disc, and the upper part is a C-axis capable of rotating around a vertical axis; the lower part is an A axis which can swing around a vertical axis, and the A axis and the C axis are respectively connected through an exchangeable interface. The main shaft box of the shaft A, the main shaft box supporting shaft and the torque motor inner rotor are connected to a shaft A box body provided with a torque motor outer rotor through bearings. The milling head is connected with the C shaft through a hydraulic pulling claw by positioning of the end tooth disc, and the pulling claw is hydraulically controlled to realize the exchange of the A shaft. The torque motor on the shaft C transmits torque through the end-toothed disc to realize circumferential rotation of the shaft A, and the torque motor on the shaft A realizes swing of the spindle box.

Above-mentioned structure is that the internal rotor torque motor through the disalignment rotates the finish machining that realizes the work piece, but internal rotor torque motor is at long-time rotation in-process, inside temperature can uprise, because on the reason heat of the heat conductivity of material can conduct the work piece of fixed motor, thereby can lead to the work piece of fixed motor to outwards carry out the thermal energy, the position that the cutter head was located after can leading to the inflation like this does not be in same space coordinate point with the position that the cutter head was confirmed under the non-operating condition, thereby make five-axis linkage can't carry out accurate processing and waste cost.

Disclosure of Invention

The utility model aims at providing a double pendulum cutter head prevent extrusion device can solve how to eliminate the long-time influence to the machining precision that generates heat of machine.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a double pendulum cutter head prevent extrusion device, double pendulum cutter head include the unit, fix go up lower unit on the unit and fix cutter head on the unit down, it includes casing and C axle motor to go up the unit, the stator of C axle motor is fixed in last casing, wear to be equipped with the rotor on the stator of C axle motor, the cover is equipped with C axle encoder on the rotor that is in the top of C axle motor, prevents that extrusion device sets up between C axle motor and C axle encoder, a serial communication port, prevent that extrusion device includes swivel bearing and fixes the bearing housing of swivel bearing outer lane, the inner race cover of bearing is established on the rotor, the bearing housing can be rotated the bearing relatively and is removed along the axis direction of C axle, have the clearance between bearing housing and the C axle encoder.

After the C-axis motor runs for a long time, a large amount of heat generated by the rotation of the C-axis motor and the bearing is transmitted to the bearing sleeve, the bearing sleeve is heated to expand, the bearing sleeve can abut against the bottom surface of the C-axis encoder at the beginning due to the elastic part, and the elastic part can be slowly extruded and expanded downwards after being heated, so that the influence of the long-time heating of the machine on the processing precision is eliminated; during actual manufacturing, this C axle encoder is prior art, can directly purchase on the market, and this patent only involves C axle encoder's specific position structure, and the inner structure of placing C axle encoder in is prior art, does not specifically write here.

In the anti-extrusion device of the double-pendulum milling head, a plurality of elastic pieces are circumferentially distributed between the bearing sleeve and the C-axis motor, and the bearing sleeve can move along the axis direction of the bearing sleeve through the elastic pieces. The elastic piece can assist the bearing sleeve to move along the axial direction of the C shaft.

In the anti-extrusion device of the double-pendulum milling head, the bearing seat is sleeved on the outer side of the bearing sleeve and is barrel-shaped, the rotor penetrates through the bottom of the bearing seat, the outer bottom surface of the bearing seat is fixed on the rotor of the C-axis motor, the bottom surface of the bearing sleeve is abutted against the inner bottom surface of the bearing seat, two ends of the elastic piece are abutted against the bottom of the bearing sleeve and the bottom of the bearing seat respectively, and the bearing sleeve can move along the axis direction of the C-axis relative to the bearing seat. The bearing frame can effectually fix C axle encoder to can support the bearing housing for the elastic component and provide the fulcrum.

In the anti-extrusion device of the double-pendulum milling head, the elastic part is an expansion spring, the bottom surface of the bearing sleeve is provided with a first groove which corresponds to the expansion spring one by one, the inner bottom surface of the bearing seat is positioned at a position opposite to the first groove and is provided with a second groove, and two ends of the expansion spring are respectively abutted against the inside of the first groove and the inside of the second groove. The first telescopic spring and the second telescopic spring can effectively support the bearing sleeve to abut against the bottom of the C-shaft encoder, and can be compressed in real time when the bearing sleeve expands, so that space is reserved for expansion of the bearing sleeve.

In the anti-extrusion device of the double-pendulum milling head, the radial bearing is arranged between the bearing seat and the bearing sleeve, the bearing seat is fixed on an outer ring of the radial bearing, the bearing sleeve is fixed on an inner ring of the radial bearing, and the inner ring of the radial bearing can move along the axial direction of the radial bearing relative to the outer ring. Can produce the displacement when the bearing housing expands, consequently produce the friction between the lateral surface of bearing housing can and the inner wall of bearing frame, can reduce frictional force through radial bearing when above-mentioned structure enables to take place relative displacement between bearing housing and the bearing frame to avoid wearing and tearing.

In the anti-extrusion device of the double-pendulum milling head, the inner ring of the rotary bearing abuts against the rotating part of the C-axis encoder, the photometric disk of the C-axis encoder is fixed on the bearing seat, and the top end of the bearing sleeve abuts against the photometric disk of the C-axis encoder. The structure can record the rotating angle of the C-axis motor in real time.

Compared with the prior art, the anti-extrusion device of the double-pendulum milling head has the advantage of eliminating the influence of long-time heating of a machine on the processing precision.

Drawings

Fig. 1 is a schematic front sectional view of the double pendulum milling head.

Fig. 2 is a partially enlarged schematic view of the anti-extrusion device at a portion a in fig. 1.

Fig. 3 is a partially enlarged schematic view of the oil removing device in the portion B of fig. 1.

Fig. 4 is a front sectional structural schematic diagram of the lower unit and the milling head of the double-pendulum milling head.

Fig. 5 is a schematic perspective view of an oil removing sleeve in the milling head of the double pendulum milling head.

In the figure, 1, an upper shell; 10. a C-axis motor; 11. a stator; 12. a rotor; 13. a C-axis encoder; 14. a rotating bearing; 15. a bearing housing; 150. a first groove; 16. a tension spring; 17. a bearing seat; 170. a second groove; 18. a radial bearing; 2. a left housing; 20. an oiling liquid channel; 21. swinging the mouth; 22. fixing a sleeve; 23. a rotating distributor; 230. an oil conveying cavity; 231. a groove; 232. an internal oil passage; 233. a connecting portion; 234. a support plate; 235. a support pillar; 24. a rotating sleeve; 240. a placement section; 241. a fixed part; 242. a force bearing portion; 243. a bearing; 25. a brake sleeve; 26. an A-axis encoder; 3. a right housing; 30. an A-axis motor; 300. a stator; 301. a rotor; 4. a milling head; 40. an outer housing; 41. a milling cutter motor; 410. a stator; 411. a rotor; 42. a lower oil passage; 5. exchanging the sleeve; 50. an air intake passage; 51. an oil suction passage; 52. a support portion; 53. a support hole; 6. removing the oil sleeve; 60. an air outlet channel; 61. an oil storage chamber; 62. an oil storage tank; 620. a drainage hole; 63. a wind collecting groove; 64. a wind collecting cavity; 65. an oil resistance groove; 66. a guide portion; 660. a first guide surface; 661. a second guide surface; 67. a bearing; 670. a spacer ring; 68. a support ring; 69. a cylindrical spring; 7. and (6) cooling the sleeve.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2, 3 and 4, the oil removing apparatus of the double pendulum milling head, which includes an upper unit, the milling head comprises a lower unit and a milling head, wherein the lower unit is fixed on the upper unit, the upper unit comprises an upper shell 1 and a C-axis motor 10, a stator 11 of the C-axis motor 10 is fixed in the upper shell 1, a stator 12 is fixed on the stator 12 of the C-axis motor 10, a C-axis encoder 13 is sleeved on the stator 12 above the C-axis motor 10, the lower unit comprises a left shell 2, a right shell 3 and two A-axis motors 30 which are respectively positioned in the left shell 2 and the right shell 3 and can rotate around an A axis, the A-axis motor 30 comprises a stator 300 fixed in the left shell 2 or the right shell 3 and a rotor 301 positioned in the stator 300, the milling head 4 is positioned between the left shell 2 and the right shell 3, and the milling head 4 comprises an outer shell 40 and a milling cutter motor 41 positioned in the outer shell 40.

As shown in fig. 1 and 2, the anti-extrusion device is disposed between the C-axis motor 10 and the C-axis encoder 13, and includes a rotary bearing 14 and a bearing sleeve 15 fixed on an outer ring of the rotary bearing 14, an inner ring of the bearing is sleeved on the stator 12, an inner ring of the rotary bearing 14 abuts against a rotating member of the C-axis encoder 13, an optical disc of the C-axis encoder 13 is fixed on a bearing seat 17, and a top end of the bearing sleeve 15 abuts against an optical disc of the C-axis encoder 13.

As shown in fig. 1 and 2, a plurality of elastic members are circumferentially distributed between the bearing sleeve 15 and the C-axis motor 10, the bearing sleeve 15 can move along the axis direction of the bearing sleeve 15 through the elastic members, the top end of the bearing sleeve 15 abuts against the bottom surface of the C-axis encoder 13 through the elastic members, the elastic members are the extension springs 16, the bottom surface of the bearing sleeve 15 is provided with first grooves 150 corresponding to the extension springs 16 one by one, the inner bottom surface of the bearing seat 17 is located at the position opposite to the first grooves 150 and is provided with second grooves 170, and two ends of the extension springs 16 abut against the first grooves 150 and the second grooves 170 respectively.

As shown in fig. 1 and 2, a barrel-shaped bearing seat 17 is sleeved outside a bearing sleeve 15, a stator 12 penetrates through the bottom of the bearing seat 17, the outer bottom surface of the bearing seat 17 is fixed on the stator 12 of the C-axis motor 10, the bottom surface of the bearing sleeve 15 abuts against the inner bottom surface of the bearing seat 17, two ends of an elastic member respectively abut against the bottom of the bearing sleeve 15 and the bottom of the bearing seat 17, the bearing sleeve 15 can move along the axis direction of the C-axis relative to the bearing seat 17, a radial bearing 18 is arranged between the bearing seat 17 and the bearing sleeve 15, the bearing seat 17 is fixed on the outer ring of the radial bearing 18, the bearing sleeve 15 is fixed on the inner ring of the radial bearing 18, and the inner ring of the radial bearing 18 can move along the axis.

After the long-time operation of C axle motor 10, on a large amount of heat that C axle motor 10 and bearing rotation sent can conduct bearing housing 15, bearing housing 15 will be heated the inflation this moment, because expanding spring's reason, bearing housing 15 can support at first on C axle encoder 13's bottom surface, can slowly extrude the elastic component and expand downwards after being heated to the long-time influence to the machining precision that generates heat of two-way yaw has been eliminated.

As shown in fig. 1 and 4, the swing head structure is located between the rotor 301 and the milling head 4 and can drive the milling head 4 to swing, the swing head structure includes a fixed sleeve 22 fixed in the left housing 2 and a rotary distributor 23 fixed on the rotor 301, the rotary distributor 23 can rotate relative to the fixed sleeve 22, a plurality of upper oil liquid channels 20 are provided in the fixed sleeve 22, a plurality of oil transportation cavities 230 are provided on the rotary distributor 23, a plurality of grooves 231 are provided in the circumferential direction of the outer side surface of the rotary distributor 23, a plurality of oil transportation cavities 230 are formed between the plurality of grooves 231 and the inner wall of the fixed sleeve 22, the plurality of upper oil liquid channels 20 are respectively communicated with the corresponding plurality of oil transportation cavities 230, a plurality of inner oil liquid channels 232 respectively communicated with the plurality of oil transportation cavities 230 one by one are provided along the axial direction of the rotary distributor 23 at one end of the fixed sleeve 22 facing the outer housing 40, and a plurality of lower oil liquid channels 42, a plurality of lower oil passages 42 are formed in the outer shell 40, and the plurality of lower oil passages 42 are respectively communicated with the corresponding plurality of oil delivery cavities 230.

As shown in fig. 1 and 4, the swing opening 21 is formed in one side of the left casing 2 opposite to the right casing 3, one end of the rotary distributor 23 is located in the swing opening 21 and fixed to the side surface of the outer casing 40 through a bolt, the rotary distributor 23 is annular, a connecting portion 233 protruding from the inner annular wall is arranged at one end, close to the outer casing 40, of the inner annular wall of the rotary distributor 23, the connecting portion 233 is fixed to the outer casing 40 through a bolt, a supporting plate 234 is arranged at one end, far away from the outer casing 40, of the rotary distributor 23, a supporting column 235 is arranged on the supporting plate 234 along the axial direction of the rotary distributor 23, and an a.

As shown in fig. 1 and 4, a rotary sleeve 24 is disposed between the fixed sleeve 22 and the rotor 301, the rotary sleeve 24 includes a placing portion 240 located in the rotor 301, a fixing portion 241 located in the swing opening 21, and a force bearing portion 242 located between the placing portion 240 and the fixing portion 241, the placing portion 240 is fixed on the rotor 301 by bolts, the outer shell 40 is fixed on the fixing portion 241 by bolts, a bearing 243 is disposed between the force bearing portion 242 and an inner cavity of the right shell 3 or the left shell 2, an outer ring of the bearing 243 is fixed on the stator 300 by bolts, an inner ring of the bearing 243 is sleeved on the force bearing portion 242, a brake sleeve 25 is disposed between the fixed sleeve 22 and the rotary sleeve 24, the brake sleeve 25 is fixed on the rotary sleeve 24 by bolts, and the brake sleeve 25 is made of a friction-resistant material.

The oil can flow into the upper oil channel 20 arranged in the fixed sleeve 22 from the outside, and as the upper oil channel 20 is communicated with the oil conveying cavity 230 on the rotary distributor 23, the oil in the upper oil channel 20 flows into the corresponding oil conveying cavity 230, and the rotary distributor 23 can enable the milling head 4 to convey the oil into the milling head 4 from the swinging head even in the rotating process, so that the lubricating effect of the milling head 4 in the running process is realized; the oil passage 20 is formed in the fixing sleeve 22 to prevent the oil from leaking due to excessive oil pressure during transportation.

As shown in fig. 1, fig. 3 and fig. 5, the oil removing device is disposed on the milling cutter motor 41, the oil removing device includes a switching sleeve 5 and an oil removing sleeve 6 disposed in the switching sleeve 5, the rotor 411 simultaneously passes through the switching sleeve 5 and the oil removing sleeve 6 and can rotate relative to the switching sleeve 5 and the oil removing sleeve 6, an air inlet channel 50 and an oil suction channel 51 are disposed in the switching sleeve 5, a plurality of air outlet channels 60 facing the side wall of the rotor 411 are disposed in the oil removing sleeve 6, the plurality of air outlet channels 60 are all communicated with the air inlet channel 50, an oil storage cavity 61 is disposed on the oil removing sleeve 6, the plurality of air outlet channels 60 can blow oil on the rotor 411 into the oil storage cavity 61, and the oil suction channel 51 is communicated with the oil storage cavity 61.

As shown in fig. 1, fig. 3 and fig. 5, an air collecting groove 63 and an oil storage groove 62 are circumferentially formed on the outer side surface of the oil removing sleeve 6, an air collecting cavity 64 is formed between the air collecting groove 63 and the inner side wall of the exchange sleeve 5, the air inlet channel 50 and the plurality of air outlet channels 60 are both communicated with the air collecting cavity 64, the air inlet channel 50 is communicated with the plurality of air outlet channels 60 through the air collecting cavity 64, the oil storage cavity 61 is formed between the oil storage groove 62 and the inner side wall of the exchange sleeve 5, the outer side wall of the oil removing sleeve 6 is tightly attached to the inner side wall of the exchange sleeve 5, the air collecting groove 63 is located below the oil storage groove 62, the plurality of air outlet channels 60 are all formed from the air collecting groove 63 to the top direction of the inner side surface of the oil removing sleeve 6, the plurality of air outlet channels 60 are distributed along the circumference of the oil removing sleeve 6, an oil blocking groove 65 is formed on the inner side surface of the oil removing.

As shown in fig. 1, 3 and 5, the position that the top of deoiling cover 6 is close to the inside wall has the guide part 66 that sets up from deoiling cover 6 to rotor 411 lateral surface direction slope, one side of guide part 66 towards deoiling cover 6 lateral surface is spigot surface 660, one side of guide part 66 towards deoiling cover 6 medial surface is spigot surface two 661, the bottom of spigot surface one 660 supports and leans on in hindering oil groove 65, the bottom of spigot surface two 661 supports and leans on the top terminal surface of deoiling cover 6, a plurality of drainage hole 620 has been seted up along deoiling cover 6 circumference to one side that oil storage chamber 61 is close to the top of deoiling cover 6.

As shown in fig. 1, 3 and 5, two coaxial bearings 67 are disposed between the exchange sleeve 5 and the rotor 411, a separation ring 670 is disposed between the two bearings 67, an inner cooling sleeve 7 is disposed between the bearings 67 and the exchange sleeve 5, an outer sidewall of the inner cooling sleeve 7 is tightly attached to an inner sidewall of the exchange sleeve 5, an outer ring of the bearing 67 is fixed to the inner sidewall of the inner cooling sleeve 7, an inner ring of the bearing 67 is fixed to the rotor 411, a support portion 52 is disposed at a position of the outer sidewall of the exchange sleeve 5 near the top, a support ring 68 is sleeved on the outer sidewall of the exchange sleeve 5, a bottom surface of the support ring 68 abuts against the stator 410, an elastic member is disposed between a bottom of the support portion 52 and the support ring 68, the exchange sleeve 5 can move up and down relative to the support ring 68 through the elastic member, a plurality of support holes 53 are distributed at the bottom of the support portion 52 along, the elastic element is a cylindrical spring 69, one end of the cylindrical spring 69 is abutted in the supporting hole 53, and the other end of the cylindrical spring 69 is abutted on the supporting ring 68.

The exchange sleeve 5 provides the fixed action for the deoiling cover 6, the air inlet channel 50 arranged in the exchange sleeve 5 also provides the gas output outwards for the air outlet channel 60 in the deoiling cover 6, because a gap is formed between the deoiling cover 6 and the rotor 411, so that the oil can flow down along the rotor 411, and because of the reason of the air outlet channel 60 in the deoiling cover 6, the air blown out from the air outlet channel 60 can blow the oil rotor 411 upwards into the oil storage cavity 61 arranged on the deoiling cover 6, and finally, the oil collected in the oil storage cavity 61 is completely sucked away by the negative pressure generated by connecting the vacuum equipment with the oil suction channel 51 in the outside, so that the oil can be prevented from dripping from the milling head 4.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (6)

1. The utility model provides a double pendulum cutter head prevent extrusion device, double pendulum cutter head include the unit, fix go up the lower unit on the unit and fix cutter head on the unit down, it includes casing (1) and C axle motor (10) to go up the unit, stator (11) of C axle motor (10) are fixed in last casing (1), be fixed with rotor (12) on stator (11) of C axle motor (10), the cover is equipped with C axle encoder (13) on rotor (12) that is in the top of C axle motor (10), prevent that extrusion device sets up between C axle motor (10) and C axle encoder (13), its characterized in that, prevent extrusion device includes swivel bearing (14) and fixes bearing housing (15) of swivel bearing (14) outer lane, the inner circle cover of bearing is established on rotor (12), bearing housing (15) can move along the axis direction of C axle to swivel bearing (14) relatively, and a gap is reserved between the bearing sleeve (15) and the C-axis encoder (13).

2. The double pendulum milling head extrusion preventing device of claim 1, wherein a plurality of elastic members are circumferentially distributed between the bearing sleeve (15) and the C-axis motor (10), and the bearing sleeve (15) can move along the axial direction of the bearing sleeve (15) through the elastic members.

3. The double-pendulum milling head extrusion preventing device according to claim 2, wherein a bearing seat (17) is sleeved on an outer side of the bearing sleeve (15), the bearing seat (17) is barrel-shaped, the rotor (12) penetrates through a bottom of the bearing seat (17), an outer bottom surface of the bearing seat (17) is fixed on the rotor (12) of the C-axis motor (10), a bottom surface of the bearing sleeve (15) abuts against an inner bottom surface of the bearing seat (17), two ends of the elastic member respectively abut against a bottom of the bearing sleeve (15) and a bottom of the bearing seat (17), and the bearing sleeve (15) can move relative to the bearing seat (17) along an axial direction of the C-axis.

4. The anti-extrusion device of the double-pendulum milling head according to claim 3, wherein the elastic member is a telescopic spring (16), first grooves (150) corresponding to the telescopic springs (16) one by one are formed in the bottom surface of the bearing sleeve (15), second grooves (170) are formed in positions, opposite to the first grooves (150), of the inner bottom surface of the bearing seat (17), and two ends of the telescopic spring (16) abut against the inside of the first grooves (150) and the inside of the second grooves (170) respectively.

5. The double pendulum milling head anti-extrusion device of claim 3, characterized in that a radial bearing (18) is arranged between the bearing seat (17) and the bearing sleeve (15), the bearing seat (17) is fixed on an outer ring of the radial bearing (18), the bearing sleeve (15) is fixed on an inner ring of the radial bearing (18), and the inner ring of the radial bearing (18) can move relative to the outer ring along the axial direction of the radial bearing (18).

6. The double pendulum milling head anti-extrusion device of claim 4, wherein the inner ring of the rotary bearing (14) abuts against the rotating member of the C-axis encoder (13), the optical disc of the C-axis encoder (13) is fixed on the bearing seat (17), and the top end of the bearing sleeve (15) abuts against the optical disc of the C-axis encoder (13).

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