CN110961662B - Electric spindle and numerical control equipment - Google Patents
Electric spindle and numerical control equipment Download PDFInfo
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- CN110961662B CN110961662B CN201911215839.6A CN201911215839A CN110961662B CN 110961662 B CN110961662 B CN 110961662B CN 201911215839 A CN201911215839 A CN 201911215839A CN 110961662 B CN110961662 B CN 110961662B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
Abstract
The invention provides an electric spindle which comprises a spindle shaft core, a spindle bearing and a plurality of miniature bearings, wherein the spindle shaft core is arranged in a hollow mode, the spindle bearing is sleeved in the spindle shaft core, a bearing outer ring of the spindle bearing is fixedly connected with the spindle shaft core, the miniature bearings are movably connected to the spindle shaft core, and the outer diameter of each miniature bearing is smaller than that of the spindle shaft core.
Description
Technical Field
The invention relates to the technical field of numerical control equipment or numerical control machine tools, in particular to an electric spindle and numerical control equipment.
Background
At present, the main factor object for limiting the limit rotating speed of the main shaft in the electric main shaft industry is a bearing. With the increase of the rotation speed of the main shaft, the centrifugal force of the bearing ball and the gyro moment are rapidly increased, the contact stress on the surface of the inner/outer ring track is rapidly increased, and if the contact stress exceeds a certain value, the service life is rapidly reduced. Spindle motors can provide higher power and torque with increasing size, however, the limit speed of the spindle bearings due to contact stress limitations is much lower than the maximum speed that can be provided by the motor.
The bearing is limited by the contact stress of the rolling elements and the inner and outer rings, and the diameter (including the inner diameter and the outer diameter) of the bearing and the limit rotating speed have a one-to-one correspondence relationship: the bearing diameter is small, the limit rotating speed is high, the bearing diameter is large, and the limit rotating speed is low; the descending amplitude of the limit rotating speed of the bearing is increased along with the increase of the diameter of the bearing.
Disclosure of Invention
The electric spindle can effectively solve the industrial problems that the radial rigidity of the electric spindle is insufficient and the limit rotating speed of the spindle is limited by a bearing, and can also avoid the vibration problem caused by a broach structure under the high rotating speed of the spindle.
The embodiment of the invention provides an electric spindle which comprises a spindle shaft core, a spindle bearing and a plurality of miniature bearings, wherein the spindle shaft core is arranged in a hollow mode, the spindle bearing is sleeved in the spindle shaft core, a bearing outer ring of the spindle bearing is fixedly connected with the spindle shaft core, the miniature bearings are movably connected to the spindle shaft core, and the outer diameter of each miniature bearing is smaller than that of the spindle shaft core.
The micro bearing plays a supporting role, and when the diameter of the micro bearing is smaller than that of the main shaft, the self-reached limit rotating speed is higher. Compared with the situation that the diameter is larger than the diameter of the main shaft, the linear speed of the supporting contact surface of the bearing is improved to a certain extent due to the nonlinear change rule of the limit rotating speed and the diameter of the bearing; meanwhile, the rigidity of the main shaft is increased, the bending deformation is reduced, the inherent frequency is improved, and resonance is not easy to occur; on the other hand, the lubricating effect of the contact surface can be improved, the leakage and pollution of the lubricating oil are reduced, and the assembly and the adjustment are facilitated.
The linear velocities of the main shaft and the bearing contact surface are all V
Support bearing speed omega 2, support bearing radius r2
From the kinematic relation, it can be known
V=r1·ω1=r2·ω2
Furthermore, the tail end of the spindle shaft core is also provided with a connecting flange, and the miniature bearings are movably connected between the connecting flange and the spindle shaft core.
Furthermore, a plurality of miniature bearings roll and are also connected to the outer peripheral wall at the front end of the spindle core.
Furthermore, the spindle further comprises a broach structure, and the broach structure is fixed at the front end of the spindle core.
The spindle is characterized by further comprising a spindle sleeve and a cooling sleeve, wherein the spindle sleeve is arranged in a hollow mode, the cooling sleeve is fixed on the inner wall of the spindle sleeve, a spindle core is sleeved in the spindle sleeve, an input cooling groove and an output cooling groove which are communicated with the cooling sleeve are further formed in the spindle sleeve, and a cooling loop is formed among the input cooling groove, the cooling sleeve and the output cooling groove.
The lubricating device is fixed on the end face of the shaft sleeve through a connecting flange, a first oil inlet groove used for adding lubricating oil to the main shaft bearing is formed in the lubricating device, a plurality of second oil inlet grooves and a single oil return groove used for adding lubricating oil to the miniature bearing are further formed in the shaft sleeve, and a lubricating loop is formed between the plurality of second oil inlet grooves and the single oil return groove.
Further, a bearing spacer ring is fixed on the main shaft bearing, a first lubricating channel is formed in the bearing spacer ring, a second shaft core is sleeved in the main shaft bearing, a bearing inner ring of the main shaft bearing is fixedly connected with the second shaft core, a second lubricating channel communicated with the first lubricating channel is formed in the second shaft core, and the second lubricating channel is communicated with the first oil inlet groove.
Further, the main shaft bearing is a sealing structure, and the main shaft bearing is wrapped on the periphery of the second shaft core.
Furthermore, the lubricating device comprises an oil cylinder, a piston, a push rod and a rear end cover, the piston is fixed in the oil cylinder and can move left and right relative to the oil cylinder, one end of the push rod is fixed on the piston, the other end of the push rod penetrates through the connecting flange and extends into the second shaft core, the oil cylinder is fixed on the rear end cover, the rear end cover is fixed on the connecting flange, and the first oil inlet groove is formed in the rear end cover.
Further, the micro bearing comprises a supporting bearing, a supporting bearing shaft core, a locking nut and a fixing nut, the supporting bearing is sleeved on the supporting bearing shaft core, the locking nut is located at one end of the supporting bearing and fixedly connected with the supporting bearing, and the fixing nut is far away from one end of the locking nut and fixedly connected with the supporting bearing shaft core.
Furthermore, an oil guide groove is formed in the supporting bearing and is communicated with the second oil inlet grooves and the oil return grooves respectively.
Furthermore, a sealing element used for ensuring that the front end of the main shaft is not influenced by cutting fluid is fixedly connected to the joint of the main shaft core and the shaft sleeve.
The sealing element is in threaded connection with the spindle shaft core and can move left and right relative to the spindle shaft core, and the outer circle surface of the sealing element is arranged in an arc shape.
The embodiment of the invention also provides numerical control equipment which comprises the electric spindle.
Compared with the prior art, the invention has the following beneficial effects: because the main shaft bearing is arranged in the inner cavity of the main shaft core, the size of the bearing can be effectively reduced, the limit rotating speed of the bearing is improved, and the maximum rotating speed of the main shaft is improved; and a plurality of miniature bearings which play a supporting role are additionally arranged on the outer peripheral wall at the front end of the spindle core and between the connecting flanges, so that the radial rigidity of the spindle is improved, the processing capacity and range of the spindle are expanded, and the spindle with the structure is applied to more types of machine tools.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived on the basis of the following drawings without inventive effort.
Fig. 1 is a schematic structural diagram of an electric spindle according to the present invention.
3 fig. 32 3 is 3 a 3 schematic 3 sectional 3 view 3 taken 3 along 3 the 3 line 3 a 3- 3 a 3 in 3 fig. 31 3. 3
Fig. 3 is an enlarged view of a portion B in fig. 2.
Fig. 4 is a schematic perspective view of an electric spindle according to the present invention.
Fig. 5 is a schematic perspective view of the spindle core, the micro bearing and the connecting flange according to the present invention.
Figure 6 is a cross-sectional view of a micro-bearing according to the present invention.
FIG. 7 is a schematic view of the lubrication of the motorized spindle of the present invention during oil-air lubrication.
Fig. 8 is a schematic view of cooling of the motorized spindle of the present invention.
The figure includes: the device comprises a main shaft core 1, a main shaft bearing 2, a bearing spacer ring 21, a first lubricating channel 22, a second lubricating channel 23, a broach structure 3, a miniature bearing 4, a fixing nut 41, a supporting bearing core 42, a supporting bearing 43, a locking nut 44, a connecting flange 5, a shaft sleeve 6, a cooling jacket 7, an input cooling groove 71, an output cooling groove 72, a lubricating device 8, an oil cylinder 81, a piston 82, a rear end cover 83, a mandril 84, a mandril slider 85, a first oil inlet groove 86, a second oil inlet groove 87, an oil return groove 88, a second shaft core 9, a sealing element 10, a locking bolt 11, an encoder 12, an encoder fixing ring 13, a motor rotor 14, a motor stator 15, a pull rod positioning ring 16, a flat end fastening screw 17, a pull rod 18, a disc spring group 19, a disc spring group spacer ring 191 and a disc spring limiting ring 192.
Detailed Description
The invention is further described with reference to the following examples.
Example 1:
as shown in fig. 1-5, an embodiment of the present invention provides an electric spindle, which includes a spindle core 1, a spindle bearing 2, a broach structure 3, and a plurality of micro bearings 4, wherein the spindle core 1 is hollow, the spindle bearing 2 is sleeved in the spindle core 1, an outer bearing ring of the spindle bearing 2 is fixedly connected to the spindle core 1, the broach structure 3 is fixed at a front end of the spindle core 1, the micro bearings 4 are connected to an outer peripheral wall of the front end of the spindle core 1 in a rolling manner, a connecting flange 5 is disposed at an end of the spindle core 1 away from the broach structure 3, the micro bearings 4 are further movably connected between the connecting flange 5 and the spindle core 1, an outer diameter of the micro bearings 4 is smaller than an outer diameter of the spindle core 1, and since the spindle bearing 2 is disposed in an inner cavity of the spindle core 1, a bearing size can be effectively reduced, and a bearing limit rotation speed is improved, the highest rotating speed of the main shaft is improved; a plurality of micro bearings 4 which play a supporting role are additionally arranged between the outer peripheral wall at the front end of the spindle shaft core 1 and the connecting flange 5, so that the radial rigidity of the spindle is improved, the processing capacity and range of the spindle are expanded, and the spindle with the structure is applied to more types of machine tools; meanwhile, the main shaft broach structure 3 is arranged at the front end of the main shaft bearing 2, so that the use space of the inner cavity of the main shaft core 1 is saved, the main shaft structure is more compact, and meanwhile, the transmission chain is reduced, so that the vibration source caused by the broach structure 3 is further reduced.
The electric spindle also comprises a motor rotor 14, a motor stator 15, a pull rod 18, a pull rod positioning ring 16, a flat end set screw 17, a disc spring group 19, a disc spring group spacer ring 191 and a disc spring limiting ring 192, wherein the electronic rotor 14 is fixed on the spindle core 1, and the motor stator 15 is fixed on the electronic rotor 14; the pull rod 18 is fixed at the front end of the spindle shaft core 1, the pull rod positioning ring 16 and the flat end set screw 17 are fixed at two ends of the pull rod 18, the disc spring group 19 is fixed on the electronic rotor 14, and the disc spring group spacing ring 191 and the disc spring limiting ring 192 are fixed at two ends of the disc spring group 19.
In a preferred embodiment, the spindle bearing 2 is a sealing structure, and the spindle bearing 2 is wrapped around the spindle core 1 to ensure that the front end of the spindle bearing 2 is not affected by the cutting fluid.
In a preferred embodiment, the spindle further comprises a shaft sleeve 6 and a cooling jacket 7, wherein the shaft sleeve 6 is hollow, the cooling jacket 7 is fixed on the inner wall of the shaft sleeve 6, the spindle core 1 is sleeved in the shaft sleeve 6, the shaft sleeve 6 is further provided with an input cooling groove 71 and an output cooling groove 72 which are communicated with the cooling jacket 7, and a cooling loop is formed among the input cooling groove 71, the cooling jacket 7 and the output cooling groove 72.
In a preferred embodiment, the lubricating device 8 is further included, the lubricating device 8 is fixed on the end surface of the shaft sleeve 6 through the connecting flange 5, a first oil inlet groove 86 used for adding lubricating oil to the main shaft bearing 2 is formed in the lubricating device 8, a plurality of second oil inlet grooves 87 and a single oil return groove 88 used for adding lubricating oil to the plurality of micro bearings 4 are further formed in the shaft sleeve 6, a lubricating circuit is formed between the plurality of second oil inlet grooves 87 and the oil return groove 88, and further, a grease lubricating mode can be used.
In a preferred embodiment, a bearing spacer 21 is fixed on the main shaft bearing 2, a first lubricating channel 22 is formed in the bearing spacer 21, the main shaft bearing 2 is provided with two groups of angular contact ball bearing groups, preferably back-to-back type angular contact ball bearing groups, the second shaft core 9 is sleeved between the two main shaft bearings 2, one side of each of the two main shaft bearings 2 is further provided with a locking bolt 11 fixedly connected with the second shaft core 9 and used for limiting the position of the main shaft bearing 2, a bearing inner ring of the main shaft bearing 2 is fixedly connected with the second shaft core 9, a second lubricating channel 23 communicated with the first lubricating channel 22 is formed in the second shaft core 9, and the second lubricating channel 22 is communicated with the first oil inlet groove 86.
In the preferred embodiment, the lubricating device 8 includes an oil cylinder 81, a piston 82, a push rod 84 and a rear end cover 83, the piston 82 is fixed in the oil cylinder 81 and can move left and right relative to the oil cylinder 81, one end of the push rod 84 is fixed on the piston 82, the other end of the push rod 84 penetrates through the connecting flange 5 and extends into the second shaft core 9, the oil cylinder 81 is fixed on the rear end cover 83, the rear end cover 83 is fixed on the connecting flange 5, a first oil inlet groove 86 is opened on the rear end cover 83, and a push rod slider 85 is further disposed between the push rod 84 and the second shaft core.
In the preferred embodiment, the micro-bearing 4 includes a supporting bearing 43, a supporting bearing core 42, a locking nut 44 and a fixing nut 41, the supporting bearing 43 is sleeved on the supporting bearing core 42, the locking nut 44 is located at one end of the supporting bearing 43 and is fixedly connected with the supporting bearing 43, and one end of the fixing nut 41 far away from the locking nut 44 is fixedly connected with the supporting bearing core 42.
Still be provided with the solid fixed ring 13 of encoder between main shaft axle center end and miniature bearing 4, be provided with on the solid fixed ring 13 of encoder with the solid fixed ring 13 fixed connection's of encoder 12.
In the preferred embodiment, the support bearing 43 is provided with oil guide grooves which are respectively communicated with a plurality of oil inlet grooves 87 and oil return grooves 88.
In the preferred embodiment, a seal 10 for protecting the front end of the spindle from the cutting fluid is fixedly connected to the joint of the spindle core 1 and the spindle sleeve 6.
In a preferred embodiment, the sealing element 10 is in threaded connection with the spindle core 1 and can move left and right relative to the spindle core 1, and the outer circular surface of the sealing element 10 is arranged in an arc shape.
In the preferred embodiment, the broach mechanism 3 includes a pull jaw assembly 32 and a shank 31, the shank 31 is fixed to one end of the pull jaw assembly 32,
the embodiment also provides a motor which comprises the electric spindle and can be used on a high-speed machining center machine tool.
The assembling method of the electric spindle in the embodiment is as follows:
the second spindle 9 assembly is assembled first: sequentially sleeving the first main shaft bearing 2, the front bearing spacer ring 21 and the main shaft bearing 2 at the front end of the second shaft core 9, then screwing the first locking nut 44 tightly, and pre-tightening the front bearing group; and then, sequentially sleeving the second main shaft bearing 2 and the rear bearing spacer ring 21 at the rear end of the second shaft core 9, and then screwing the second locking nut 44 to pre-tighten the two main shaft bearing 2 groups.
The bearing part arranged in the inner cavity of the spindle core 1 is preheated by a thermal expansion method, and the second spindle core 9 assembly assembled in the previous step is integrally sleeved in the inner cavity of the spindle core 1, so that the front/rear bearing outer ring is in interference fit with the spindle core. Under the condition of main shaft operation, the front/rear bearing outer ring and the shaft core operate together, and the inner ring and the second shaft core 9 are fixedly connected together and keep a static state with the connecting flange 5.
The motor rotor 14 is sleeved on the motor stator 15, and after the motor rotor and the motor stator are fixedly connected, the fixedly connected motor rotor component is sleeved in the middle of the shaft core, so that the motor rotor component is fixedly connected with the shaft core.
The encoder sleeve 12 is arranged on the encoder fixing ring 13, after the encoder sleeve 12 and the encoder fixing ring are fixedly connected, the fixedly connected encoder 12 component is sleeved at the rear end of the spindle shaft core 1, and the encoder 12 component is fixedly connected with the spindle shaft core 1 through a positioning screw.
The front, middle and rear positions of the mandril 84 are fixed with mandril sliding blocks 85 which are in clearance fit with the second shaft core 9 and can axially slide along the second shaft core 9; the ejector pin 84 assembly with the ejector pin slide 85 is loaded into position from the front end to the back end of the ejector pin 84 slide cavity. The disc spring limiting ring 192 is fixedly connected with the pull rod 18, the rear section of the disc spring set 19, the disc spring set spacer ring 191, the front section of the disc spring set 19 and the pull rod positioning ring 16 are sequentially sleeved into the pull rod 18, and then the sleeved pull rod 18 component is installed from the front end of the spindle shaft core 1 until the disc spring limiting ring 192 is close to the boss of the inner cavity of the spindle shaft core 1. And applying axial acting force to the pull rod positioning ring 18 until the radial hole of the pull rod positioning ring 16 is concentric with the radial hole of the shaft core, and screwing the flat-end set screw 17 to fixedly connect the shaft core 1 of the main shaft with the pull rod positioning ring 16. After attachment, pull pawl assembly 32 is installed.
The push rod 84 can slide along the axial direction of the inner surface of the disc spring limiting ring 192, the push rod 84 is acted by the axial force of the main shaft rear end hydraulic piston 82, the pull rod 18 moves axially towards the main shaft front end, meanwhile, the pull rod 18 drives the disc spring limiting ring 192 to act on the disc spring group 19, the disc spring group 19 is compressed, elastic potential energy is accumulated, when the axial action of the push rod 84 disappears, the elastic potential energy of the disc spring group 19 is released, the pull rod 18 is driven to axially recover through the disc spring limiting ring 192, and therefore the pull claw assembly 32 generates a broach force to lock the broach handle 31.
The second support bearing 43 assembly is sleeved on the connecting flange 5, and the two are fixedly connected by nuts. And sleeving the fixedly connected connecting flange 5 assembly into the assembled second shaft core 9 and the ejector rod 84 at the same time, and circumferentially adjusting the circumferential position of the connecting flange 5 by using the positioning process hole of the connecting flange 5 to enable the oil-gas lubrication flow passage of the connecting flange 5 to be communicated with the flow passage of the second shaft core 9. The connecting flange 5 is fixedly connected with the second shaft core 9 by screws.
The first support bearing 43 assembly is sleeved on the shaft sleeve 6, and the first support bearing 43 assembly and the shaft sleeve are fixedly connected by a nut. The motor stator is sleeved on the cooling sleeve 7, after the cooling sleeve and the cooling sleeve are fixedly connected, the fixedly connected motor stator is sleeved on the shaft sleeve 6, and the motor stator is fixedly connected with the shaft sleeve 6 by utilizing the radial set screws. And (3) sheathing the fixedly connected shaft sleeve 6 assembly from the front end of the shaft core, matching with the boss surface of the connecting flange 5 in a small clearance manner, and fixedly connecting the shaft sleeve 6 assembly with the connecting flange 5 by using screws.
The front sealing ring 10 is screwed at the front end of the main shaft, so that a certain sealing gap 1 and 2 is formed between the front sealing ring 10 and the shaft sleeve 6, the sealing member 10 is fixedly connected with the shaft core thread pair, and the axial sealing gap (2) of the front sealing ring can be adjusted.
When the broach is loosened, the oil pressure pushes the ejector rod 84 to axially act, and the tool changing action of the tool holder 31 at the front end of the spindle shaft core 1 can be completed.
Example 2:
the present embodiment is different from embodiment 1 in that: the plurality of micro bearings 4 are not connected to the outer peripheral wall of the front end of the spindle shaft core 1 in a rolling mode, only the plurality of micro bearings 4 are reserved and are movably connected between the connecting flange 5 and the spindle shaft core 1, and meanwhile the number of the plurality of micro bearings 4 can be increased or decreased in a specific condition.
The advantages of the embodiment are: the radial rigidity of the main shaft can be improved, the processing capacity and the range of the main shaft are expanded, and the main shaft with the structure can be applied to more types of machine tools.
Compared with the prior art, the invention has the following beneficial effects: because the main shaft bearing is arranged in the inner cavity of the main shaft core, the size of the bearing can be effectively reduced, the limit rotating speed of the bearing is improved, and the maximum rotating speed of the main shaft is improved; a plurality of miniature bearings which play a supporting role are additionally arranged on the outer peripheral wall at the front end of the spindle core and between the connecting flanges, so that the radial rigidity of the spindle is improved, the processing capacity and range of the spindle are expanded, and the spindle with the structure is applied to more types of machine tools; meanwhile, the main shaft broach structure is arranged at the front end of the main shaft, so that the use space of the inner cavity of the shaft core of the main shaft is saved, the structure of the main shaft is more compact, and meanwhile, a transmission chain is reduced, so that a vibration source caused by the broach structure is further reduced.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (13)
1. An electric spindle, characterized in that: the spindle shaft core is arranged in a hollow mode, the spindle shaft core is sleeved with the spindle bearing, the bearing outer ring of the spindle bearing is fixedly connected with the spindle shaft core, the miniature bearings are connected to the spindle shaft core in a rolling mode, and the outer diameter of each miniature bearing is smaller than that of the spindle shaft core.
2. An electric spindle as claimed in claim 1, characterized in that: the tail end of the spindle shaft core is further provided with a connecting flange, and the micro bearings are movably connected between the connecting flange and the spindle shaft core.
3. An electric spindle as claimed in claim 2, characterized in that: and the micro bearings are also movably connected to the outer peripheral wall at the front end of the spindle core.
4. An electric spindle as claimed in claim 1, characterized in that: the spindle further comprises a broach structure, and the broach structure is fixed at the front end of the spindle core.
5. An electric spindle as claimed in claim 1, characterized in that: the cooling device is characterized by further comprising a shaft sleeve and a cooling sleeve, wherein the shaft sleeve is arranged in a hollow mode, the cooling sleeve is fixed on the inner wall of the shaft sleeve, the spindle core is sleeved in the shaft sleeve, an input cooling groove and an output cooling groove which are communicated with the cooling sleeve are further formed in the shaft sleeve, and a cooling loop is formed among the input cooling groove, the cooling sleeve and the output cooling groove.
6. An electric spindle as claimed in claim 5, characterized in that: the lubricating device is fixed on the end face of the shaft sleeve through a connecting flange, a first oil inlet groove used for adding lubricating oil to the main shaft bearing is formed in the lubricating device, a plurality of second oil inlet grooves and a single oil return groove used for adding lubricating oil to the micro bearing are further formed in the shaft sleeve, and a lubricating loop is formed between the plurality of second oil inlet grooves and the single oil return groove.
7. An electric spindle as claimed in claim 6, characterized in that: the main shaft bearing is fixedly provided with a bearing spacer ring, the bearing spacer ring is provided with a first lubricating channel, a second shaft core is sleeved in the main shaft bearing, a bearing inner ring of the main shaft bearing is fixedly connected with the second shaft core, the second shaft core is provided with a second lubricating channel communicated with the first lubricating channel, and the second lubricating channel is communicated with the first oil inlet groove.
8. An electric spindle as claimed in claim 7, characterized in that: the main shaft bearing is a sealing structure and is wrapped on the periphery of the second shaft core.
9. An electric spindle as claimed in claim 7, characterized in that: the lubricating device comprises an oil cylinder, a piston, an ejector rod and a rear end cover, the piston is fixed in the oil cylinder and can move left and right relative to the oil cylinder, one end of the ejector rod is fixed on the piston, the other end of the ejector rod penetrates through the connecting flange and extends into the second shaft core, the oil cylinder is fixed on the rear end cover, the rear end cover is fixed on the connecting flange, and the first oil inlet groove is formed in the rear end cover.
10. An electric spindle as claimed in claim 6, characterized in that: the miniature bearing comprises a supporting bearing, a supporting bearing shaft core, a locking nut and a fixing nut, wherein the supporting bearing is sleeved with the supporting bearing shaft core, the locking nut is located at one end of the supporting bearing and fixedly connected with the supporting bearing, and the fixing nut is far away from one end of the locking nut and fixedly connected with the supporting bearing shaft core.
11. An electric spindle as claimed in claim 10, characterized in that: and the supporting bearing is provided with an oil guide groove which is communicated with the plurality of second oil inlet grooves and the single oil return groove.
12. An electric spindle as claimed in claim 5, characterized in that: a sealing element used for ensuring that the front end of the main shaft is not influenced by cutting fluid is fixedly connected at the joint of the main shaft core and the shaft sleeve;
the sealing element is in threaded connection with the spindle shaft core and can move left and right relative to the spindle shaft core, and the outer circle surface of the sealing element is arranged in an arc shape.
13. A numerical control apparatus characterized by: comprising an electric spindle according to any one of claims 1-12.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911215839.6A CN110961662B (en) | 2019-12-02 | 2019-12-02 | Electric spindle and numerical control equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911215839.6A CN110961662B (en) | 2019-12-02 | 2019-12-02 | Electric spindle and numerical control equipment |
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| CN110961662B true CN110961662B (en) | 2020-11-24 |
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| DE3818449A1 (en) * | 1988-05-31 | 1989-12-07 | Letay Gabriel Dipl Ing | Work spindle for high bending load and torque measurement by torsion |
| CN2659600Y (en) * | 2003-11-07 | 2004-12-01 | 叶横灿 | Mainshaft device of processor |
| CN101941083A (en) * | 2009-07-03 | 2011-01-12 | 株式会社捷太格特 | The main shaft device of lathe |
| CN201760789U (en) * | 2010-08-27 | 2011-03-16 | 北京精雕精密机械制造有限公司 | Rotor loosening and unloading device for rotor of electric spindle |
| CN102489727A (en) * | 2011-11-26 | 2012-06-13 | 广州市昊志机电股份有限公司 | Roll ball high-speed milling electric main shaft |
| CN103567468A (en) * | 2013-09-16 | 2014-02-12 | 浙江日发精密机械股份有限公司 | Two-channel water-cooling electric spindle of digital controlled lathe |
| CN204035580U (en) * | 2014-06-27 | 2014-12-24 | 深圳市速锋科技有限公司 | A kind of direct connection mechanical main shaft structure |
| CN204430639U (en) * | 2015-01-16 | 2015-07-01 | 广东美芝制冷设备有限公司 | Self-centering fixture |
| CN205496577U (en) * | 2016-03-10 | 2016-08-24 | 洛阳轴研科技股份有限公司 | Can carry out high -speed electric main shaft of refrigerated to rear bearing |
| CN109153102A (en) * | 2016-04-13 | 2019-01-04 | 萨特隆股份公司 | The tool spindle of the finish machining equipment of optics active surface on workpiece |
| CN105952779A (en) * | 2016-04-27 | 2016-09-21 | 浙江大学 | RV reducer spindle fixed-pressure pre-tightening structure and method |
| CN206429394U (en) * | 2017-01-13 | 2017-08-22 | 南通荣恒环保设备有限公司 | A kind of spacing swinging blower fan of slide plate root roller |
| CN207746423U (en) * | 2017-12-29 | 2018-08-21 | 江苏新银叶传动机电有限公司 | Turning of Slender Shaft vibration abatement |
| CN109366205A (en) * | 2018-12-14 | 2019-02-22 | 东莞市显隆电机有限公司 | A kind of high-speed milling knife handle type electro spindle |
| CN209184392U (en) * | 2018-12-20 | 2019-07-30 | 珠海格力电器股份有限公司 | Electro spindle and motor |
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