CN203109249U - Electric spindle of lathe - Google Patents

Electric spindle of lathe Download PDF

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Publication number
CN203109249U
CN203109249U CN 201320105453 CN201320105453U CN203109249U CN 203109249 U CN203109249 U CN 203109249U CN 201320105453 CN201320105453 CN 201320105453 CN 201320105453 U CN201320105453 U CN 201320105453U CN 203109249 U CN203109249 U CN 203109249U
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CN
China
Prior art keywords
bearing
main shaft
stator
lathe
electric spindle
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CN 201320105453
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Chinese (zh)
Inventor
徐光贤
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SHAOXING MAYU ELECTROMECHANICAL TECHNOLOGY Co Ltd
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SHAOXING MAYU ELECTROMECHANICAL TECHNOLOGY Co Ltd
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Priority to CN 201320105453 priority Critical patent/CN203109249U/en
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Abstract

The utility model discloses an electric spindle of a lathe. The electric spindle of the lathe comprises a spindle box body, wherein a motor stator is fixedly arranged in the spindle box body, a motor rotor matched with the motor stator is fixedly arranged on the spindle, a stator outer sleeve is fixedly embedded in the spindle box body, a spiral stator cooling flow passage is formed in the outer circumferential surface of the stator outer sleeve, the motor stator is fixed on the inner circumferential surface of the stator outer sleeve, a bearing outer sleeve is fixedly embedded in a front end cover, a spiral front bearing cooling flow passage is formed in the outer circumferential surface of the bearing outer sleeve, an outer ring of a front bearing is fixed on the inner circumferential surface of the bearing outer sleeve, the stator cooling flow passage and the front bearing cooling flow passage are communicated through a flow passage arranged in the spindle box body and a flow passage arranged in the front end cover respectively, the stator cooling flow passage is communicated with the outside through the flow passage arranged in the spindle box body, and the front bearing cooling flow passage is communicated with the outside through the flow passage arranged in the front end cover. According to the technical scheme of the electric spindle of the lathe, the motor stator and the front bearing are cooled through the stator cooling flow passage and the front bearing cooling flow passage, and the service life of equipment is prolonged.

Description

Electric spindle of lathe
Technical field
The utility model relates to the machine tool technology field, relates in particular to a kind of electric spindle of lathe.
Background technology
In recent years, the Digit Control Machine Tool of China has passed through development at full speed.But there is the problem of heavy main frame, light parts always, causes homemade functional part and world level to have obvious gap always.Along with the high speed development of Numeric Control Technology, increasing process unit towards at a high speed, efficient, Precision Machining and intelligent development, high-speed electric main shaft then is one of core Digit Control Machine Tool parts that can satisfy above-mentioned working condition requirement.
Electric spindle of lathe as a kind of with motor and the integrated product of lathe spindle, it directly is connected the rotor of motor with main shaft, thereby reduced the design of original lathe gear-box, removed transmission mechanism, power can directly produce and be sent to main shaft by motor.Thereby the stability when having improved the transmission performance, high-speed response of machine tool chief axis and operation.The primary structure of electric spindle of lathe comprises: be installed in the main shaft casing on the lathe, the main shaft casing is installed high-speed main spindle by front and rear cover and front and back bearings, and motor stator is nested in the main shaft casing, and the rotor that cooperates with motor stator is fixedly mounted on the main shaft.
But electric spindle of lathe of the prior art is when machining, because fore bearing bears bigger radial load and axial force, can influence service life so fore bearing can send bigger heat when work.
Summary of the invention
In order to solve above-mentioned technical problem, the purpose of this utility model provides a kind of electric spindle of lathe, by the stator coolant flow channel being set and the fore bearing coolant flow channel cools to motor stator and fore bearing, improves service life of equipment.
To achieve the above object, the utility model has adopted following technical scheme:
A kind of electric spindle of lathe, comprise the main shaft casing, the main shaft casing passes through drive end bearing bracket, rear end cap, fore bearing and rear bearing are installed main shaft, motor stator is fixedly mounted in the main shaft casing, the rotor that cooperates with motor stator is fixedly mounted on the main shaft, embedded the establishing of described main shaft casing fixedly has the stator overcoat, have the stator coolant flow channel of spiral on the outer circumference surface of stator overcoat, the inner peripheral surface fixed electrical machinery stator of stator overcoat, be embedded in the described drive end bearing bracket bearing outside is fixedly arranged, have the fore bearing coolant flow channel of spiral on the outer circumference surface of bearing outside, the inner peripheral surface of bearing outside is the outer ring of fore bearing fixedly, stator coolant flow channel and fore bearing coolant flow channel second in being connected runner and being located at drive end bearing bracket of first in the main shaft casing are connected runner and are communicated with by being located at respectively, the stator coolant flow channel is communicated with the outside by being located at the turnover of first in main shaft casing runner, and the fore bearing coolant flow channel is communicated with outside by being located at the turnover of second on drive end bearing bracket runner.
Pipe screw joint all has been threaded on the described first turnover runner and the second turnover runner.
As preferably, be installed with the front bearing retainer of sealing fore bearing on the described drive end bearing bracket, front bearing retainer is set in front-end of spindle, be arranged with at least two piston rings before and after on the outer circumference surface of front-end of spindle, the breach of piston ring is crisscross arranged, described front bearing retainer covers the outer circumference surface of described piston ring and is in contact with it cooperation, and described front bearing retainer cooperates with gap of main reinforcement.Thereby form dust cover structure by between front bearing retainer and main shaft, embedding a plurality of piston rings, can guarantee the quiet rotation of high speed of main shaft, can also constitute multi-stage sealedly by a plurality of piston rings, the breach of two piston rings is arranged in a crossed manner has stopped entering of dust even humid air.
As preferably, fill the high-speed lubrication grease in the fit clearance of described front bearing retainer and main shaft.
Described piston ring can be selected common alloy piston ring, cooperates high speed grease to use.But preferred high strength powder metallurgy, be that described piston ring is made by the self-lubricating powdered metallurgical material, in long-term the use, need not to add lubricant like this, prevented that main shaft from getting rid of the high speed grease of contact-making surface to the dust cover inboard in rotating at a high speed, and caused lacking between main shaft and the piston ring lubricated problem.Simultaneously, described front bearing retainer and main shaft are all handled through high-frequency surface hardening, and hardness reaches more than 52 degree, can not cause the main shaft wearing and tearing in running, have prolonged service life.
As preferably, described fore bearing is three angular contact ball bearings that abut one another installation, and described rear bearing is two angular contact ball bearings that abut one another installation.Reliable in structure like this, the cost performance height.
As preferably, the sensor for detection of main shaft turned position and velocity of rotation is installed on the described rear end cap.Further preferred, described sensor is rotary transformer, and the rotor of rotary transformer is fixed on rear-end of spindle, and the stator of rotary transformer is fixed on the rear end cap by sensor holder.Described rotary transformer will provide the signal of the position of rotation of main shaft and rotating speed etc. for servo or frequency converter, finish pid control circuit.
Further preferred again, described rear-end of spindle is equipped with back swelling cover, thereby the inner ring that back swelling cover is fixedlyed connected with main shaft rear bearing is positioned on the main shaft, and the rotor of described rotary transformer is fixed on swelling afterwards and puts.
Described rear-end of spindle is equipped with rear flange.
The utility model has been owing to adopted above technical scheme, by the stator coolant flow channel being set and the fore bearing coolant flow channel cools to motor stator and fore bearing, improved service life of equipment.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of distensible ring;
Fig. 3 is the mounting structure schematic diagram of piston ring.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is made a detailed explanation.
Embodiment 1:
A kind of electric spindle of lathe with dust reduction capability as shown in Figure 1, comprise main shaft casing 11, main shaft casing 11 is installed main shaft 20 by drive end bearing bracket 16, rear end cap 6, fore bearing 17 and rear bearing 5, motor stator 13 is fixedly mounted in the main shaft casing 11, and the rotor 14 that cooperates with motor stator 13 is fixedly mounted on the main shaft 20; As shown in Figure 3, be installed with the front bearing retainer 18 of sealing fore bearing 17 on the described drive end bearing bracket 16 by a plurality of screws 21, front bearing retainer 18 is set in main shaft 20 front ends, be arranged with two piston rings 19 before and after on the excircle of main shaft 20 front ends, the breach of two piston rings 19 is crisscross arranged, described front bearing retainer 18 covers the outer circumference surface of described piston ring 19 and is in contact with it cooperation, described front bearing retainer 18 and main shaft 20 matched in clearance.Described main shaft 20 front ends have flange, and the outer circumference surface of flange is provided with annular groove, the described piston ring 19 of setting-in in the annular groove.Described piston ring 19 is made by the self-lubricating powdered metallurgical material.Described front and rear cover namely is the position that main shaft and bearing are installed, also simultaneously and casing formed airtight space together, prevent that dust etc. from entering.
As shown in Figure 1, described front bearing retainer 18 and main shaft 20 are all handled through surface hardening.Described fore bearing 17 is for abutting one another three angular contact ball bearings of installation, and described rear bearing 5 is for abutting one another two angular contact ball bearings of installation.Sensor 3 for detection of main shaft 20 turned positions and velocity of rotation is installed on the described rear end cap 6.Described sensor 3 is rotary transformer, and the rotor of rotary transformer is fixed on main shaft 20 rear ends, and the stator of rotary transformer is fixed on the rear end cap 6 by sensor holder 2.Described main shaft 20 rear ends are equipped with back swelling cover 4, thereby the inner ring that back swelling cover 4 is fixedlyed connected with main shaft 20 rear bearing 5 is positioned on the main shaft 20, and swelling was overlapped on 4 after the rotor of described rotary transformer was fixed on.Described main shaft 20 rear ends are equipped with rear flange 1.
As shown in Figure 1, described rotor 14 is fixedly set on the rotor cover 141, be oppositely arranged two swelling assemblies on the rotor cover 141, two swelling assemblies lay respectively at the both sides of rotor 14, this swelling assembly comprises an expansion set 8 and a distensible ring 9, expansion set 8 is set on the rotor cover 141, expansion set 8 has an outer conical surface, described distensible ring 9 is set on the outer conical surface of expansion set 8, distensible ring 9 has the internal conical surface that matches with the outer conical surface of expansion set 8, be connected by a plurality of bolts 7 between expansion set 8 and the distensible ring 9, it is mobile in the outer conical surface of expansion set 8 to spur distensible ring 9 by swivel bolt 7 like this.Described distensible ring 9 arranges near rotor 14, and described expansion set 8 is in the outside of distensible ring 9, and described bolt 7 is threaded with distensible ring 9 after passing the through hole that is located on the expansion set 8.Like this by regulating that the swelling assembly can be controlled the location of rotor cover and to the support location of bearing inner race: when rotor is installed, after rotor overlaps 141 pines and is enclosed within on the main shaft 20, be arranged in the bolt 7 of the swelling assembly of rotor both sides by rotation, pulling distensible ring 9 moves, make the two ends that distensible ring 9 tightens up expansion set 8 and rotor cover 141 by taper seat, thereby rotor cover 141 is fixedlyed connected with main shaft 20; When coming loose bolt 7, can adjust the position of rotor 14 and rotor thereof cover 141 on main shaft 20.As shown in Figure 2, be evenly distributed with 6 to 8 radially screws 91 on the outer circumference surface of described distensible ring 9, radially be used for being threaded screw in the screw 91, can regulate the rotor dynamic balancing by the depth of regulating top screw.
As shown in Figure 1, be embedded in the described main shaft casing 11 stator overcoat 12 is fixedly arranged, have the stator coolant flow channel of spiral on the outer circumference surface of stator overcoat 12, the inner peripheral surface fixed electrical machinery stator 13 of stator overcoat 12, be embedded in the described drive end bearing bracket 16 bearing outside 15 is fixedly arranged, have the fore bearing coolant flow channel of spiral on the outer circumference surface of bearing outside 15, the inner peripheral surface of bearing outside 15 is the outer ring of fore bearing 17 fixedly, stator coolant flow channel and fore bearing coolant flow channel respectively by be located at first in the main shaft casing 11 is connected runner and be located at drive end bearing bracket 16 interior second be connected the runner connection, the stator coolant flow channel is communicated with the outside by the first turnover runner that is located in the main shaft casing 11, and the fore bearing coolant flow channel is communicated with outside by being located at the turnover of second on the drive end bearing bracket 16 runner.The described first turnover runner and second passes in and out the pipe screw joint 10 that all has been threaded on the runner, by pipe screw joint 10 and tube connector and the external refrigeration fluid supply apparatus formation cold oil circulatory system.
It is emphasized that: above only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment does.

Claims (10)

1. electric spindle of lathe, comprise main shaft casing (11), main shaft casing (11) is by drive end bearing bracket (16), rear end cap (6), fore bearing (17) and rear bearing (5) are installed main shaft (20), motor stator (13) is fixedly mounted in the main shaft casing (11), the rotor (14) that cooperates with motor stator (13) is fixedly mounted on the main shaft (20), it is characterized in that, being embedded in the described main shaft casing (11) fixedly has stator overcoat (12), have the stator coolant flow channel of spiral on the outer circumference surface of stator overcoat (12), the inner peripheral surface fixed electrical machinery stator (13) of stator overcoat (12), being embedded in the described drive end bearing bracket (16) fixedly has bearing outside (15), have the fore bearing coolant flow channel of spiral on the outer circumference surface of bearing outside (15), the inner peripheral surface of bearing outside (15) is the outer ring of fore bearing (17) fixedly, stator coolant flow channel and fore bearing coolant flow channel respectively by be located at first in the main shaft casing (11) is connected runner and be located at drive end bearing bracket (16) interior second be connected the runner connection, the stator coolant flow channel is communicated with the outside by the first turnover runner that is located in the main shaft casing (11), and the fore bearing coolant flow channel is communicated with outside by being located at the turnover of second on the drive end bearing bracket (16) runner.
2. a kind of electric spindle of lathe according to claim 1 is characterized in that, pipe screw joint (10) all has been threaded on the described first turnover runner and the second turnover runner.
3. a kind of electric spindle of lathe according to claim 1, it is characterized in that, be installed with the front bearing retainer (18) of sealing fore bearing (17) on the described drive end bearing bracket (16), front bearing retainer (18) is set in main shaft (20) front end, be arranged with at least two piston rings (19) before and after on the excircle of main shaft (20) front end, the breach of two piston rings (19) is crisscross arranged, described front bearing retainer (18) covers the outer circumference surface of described piston ring (19) and is in contact with it cooperation, described front bearing retainer (18) and main shaft (20) matched in clearance.
4. a kind of electric spindle of lathe according to claim 3 is characterized in that, described piston ring (19) is made by the self-lubricating powdered metallurgical material.
5. a kind of electric spindle of lathe according to claim 3 is characterized in that, described front bearing retainer (18) and main shaft (20) are all handled through surface hardening.
6. a kind of electric spindle of lathe according to claim 1 is characterized in that, described fore bearing (17) is for abutting one another three angular contact ball bearings of installation, and described rear bearing (5) is for abutting one another two angular contact ball bearings of installation.
7. a kind of electric spindle of lathe according to claim 1 is characterized in that, the sensor (3) for detection of main shaft (20) turned position and velocity of rotation is installed on the described rear end cap (6).
8. a kind of electric spindle of lathe according to claim 7, it is characterized in that, described sensor (3) is rotary transformer, and the rotor of rotary transformer is fixed on main shaft (20) rear end, and the stator of rotary transformer is fixed on the rear end cap (6) by sensor holder (2).
9. a kind of electric spindle of lathe according to claim 8, it is characterized in that, described main shaft (20) rear end is equipped with back swelling cover (4), back swelling cover (4) with main shaft (20) thus the inner ring of fixedlying connected rear bearing (5) is positioned on the main shaft (20), the rotor of described rotary transformer is fixed on the back swelling cover (4).
10. a kind of electric spindle of lathe according to claim 1 is characterized in that, described main shaft (20) rear end is equipped with rear flange (1).
CN 201320105453 2013-03-08 2013-03-08 Electric spindle of lathe Active CN203109249U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320105453 CN203109249U (en) 2013-03-08 2013-03-08 Electric spindle of lathe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320105453 CN203109249U (en) 2013-03-08 2013-03-08 Electric spindle of lathe

Publications (1)

Publication Number Publication Date
CN203109249U true CN203109249U (en) 2013-08-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201320105453 Active CN203109249U (en) 2013-03-08 2013-03-08 Electric spindle of lathe

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105108180A (en) * 2015-09-18 2015-12-02 芜湖日升重型机床有限公司 Motorized spindle structure of numerical control lathe
CN105827083A (en) * 2016-03-18 2016-08-03 温岭市宇海机电有限公司 Synchronous water-cooled electric spindle
CN106077719A (en) * 2016-08-30 2016-11-09 伊泽瑞尔(大连)科技有限公司 A kind of permanent magnet synchronization motor spindle
CN111555539A (en) * 2020-05-22 2020-08-18 深圳市速锋科技股份有限公司 Dynamic balance rotor structure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105108180A (en) * 2015-09-18 2015-12-02 芜湖日升重型机床有限公司 Motorized spindle structure of numerical control lathe
CN105827083A (en) * 2016-03-18 2016-08-03 温岭市宇海机电有限公司 Synchronous water-cooled electric spindle
CN106077719A (en) * 2016-08-30 2016-11-09 伊泽瑞尔(大连)科技有限公司 A kind of permanent magnet synchronization motor spindle
CN111555539A (en) * 2020-05-22 2020-08-18 深圳市速锋科技股份有限公司 Dynamic balance rotor structure
CN111555539B (en) * 2020-05-22 2021-11-02 深圳市速锋科技股份有限公司 Dynamic balance rotor structure

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