WO2013075532A1 - 一种滚珠高速铣削电主轴 - Google Patents

一种滚珠高速铣削电主轴 Download PDF

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Publication number
WO2013075532A1
WO2013075532A1 PCT/CN2012/081074 CN2012081074W WO2013075532A1 WO 2013075532 A1 WO2013075532 A1 WO 2013075532A1 CN 2012081074 W CN2012081074 W CN 2012081074W WO 2013075532 A1 WO2013075532 A1 WO 2013075532A1
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Prior art keywords
assembly
fixed
bearing
upper bearing
stator
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PCT/CN2012/081074
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English (en)
French (fr)
Inventor
汤秀清
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广州市昊志机电股份有限公司
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Publication of WO2013075532A1 publication Critical patent/WO2013075532A1/zh

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, 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
    • B23Q1/00Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/70Stationary or movable members for carrying working-spindles for attachment of tools or work
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, 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
    • B23Q5/00Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/02Driving main working members
    • B23Q5/04Driving main working members rotary shafts, e.g. working-spindles
    • B23Q5/10Driving main working members rotary shafts, e.g. working-spindles driven essentially by electrical means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, 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
    • B23Q2220/00Machine tool components
    • B23Q2220/006Spindle heads

Definitions

  • the present invention relates to a machining apparatus, and more particularly to an electromechanical integrated spindle device that integrates a rolling bearing, a cooling device, an automatic tool change system, and a motor drive.
  • the stator for the general electric spindle uses a non-converter power supply, so the rotor rotation number is not variable, the function is single, and the rotor is easily damaged under the rapid start, which affects the service life of the electric spindle, and
  • the electric spindle required for the milling function, the bearing provides insufficient supporting force, so that the shaft has sufficient rigidity in the axial and radial directions at high speed.
  • many things such as sewage and cutting chips are easy to enter the main shaft during milling, which causes internal clogging of the main shaft and seriously affects the service life of the main shaft.
  • the present invention relates to a ball high speed milling electric spindle which solves the deficiencies of the prior art.
  • the technical solution of the present invention comprises a tool change cylinder assembly (2) with a pipe joint (1), an aluminum water jacket assembly (3) for a power supply line, a gas source hole and a cooling water source interface, and an upper bearing lock nut (17). , a body component (9) having an air passage and a cooling water passage therein, wherein a head of the tool change cylinder assembly (2) is fixed in a rear inner cavity of the aluminum water jacket assembly (3), the body assembly (9)
  • the front end fixed organism lower cover (12) and the dust cover (14), and the shaft core assembly (7) penetrates through the through holes of the upper bearing assembly (6), the stator (8) and the lower bearing assembly (10), the shaft
  • the axial through hole of the core assembly (7) is provided with a tie rod assembly (4), a claw assembly (11) and a shank assembly (13) from top to bottom, characterized in that the front end of the aluminum water jacket assembly (3) It is fixed to the rear of the upper bearing block assembly (5), and the upper bearing housing (6) is fixed by the upper bearing lock nut
  • the upper bearing assembly (6) includes a bearing housing outer ring (5.1), and the bearing housing outer ring (5.1) has a bearing housing inner ring (5.3) fixed in the inner cavity, and the bearing housing outer ring (5.1) and A water circulation groove (5.2) is provided at the gap between the inner ring of the bearing housing (5.3).
  • the upper bearing assembly (6) includes upper and lower single row angular contact ceramic bearings, and a bearing spacer assembly (6.1) is fixed between the upper and lower bearings.
  • the stator (8) includes a stator punch (8.1), a tie (8.2), a wedge (8.3), a coil winding (8.4), a slot insulating paper (8.5), a temperature sensor (8.6), and a motor lead. (8.7), where the temperature sensor (8.6) is attached to one end of the coil winding (8.4).
  • the working principle of the invention is:
  • the high-speed rotating structure of the electric spindle is mainly composed of the upper bearing housing assembly (5), the upper bearing assembly (6), the shaft core assembly (7), the body assembly (9) and the lower bearing assembly (10), which adopts precision and high speed.
  • Ball angular contact bearings with a maximum speed of 32000 rpm and low vibration and noise.
  • the body assembly (9) has a plurality of water holes distributed along the circumference of the body, and the water tank of the lower cover of the machine body (12) constitutes a cooling cycle.
  • the aluminum water jacket assembly (3) is advanced. The water hole is passed into the cooling water, and enters the upper bearing housing assembly (5), the body assembly (9) and the lower body cover (12), and then the cooling water circulates around the circumference of the body, and finally from the upper bearing housing assembly (5) ) and the aluminum water jacket assembly (3) is discharged, taking away most of the heat generated by the motor and the bearing, keeping the whole machine stable and reliable at low temperatures.
  • the inner hole is then discharged from the outside of the machine to complete the dust blowing and cooling process, which can blow off the dust in the shaft core, take away the high-speed rotating bearing and a part of the heat generated when the motor works; at the same time, prevent the sewage outside the machine, Chips, gases, etc. enter the main shaft;
  • the electric spindle adopts permanent magnet DC motor, and the main part of the rotor adopts several pieces of permanent
  • the magnet is integrated on the outer circumference of the core, and the outer circumference of the permanent magnet is wrapped with a layer of carbon fiber.
  • the working revolution can be changed at 0-32000rpm, the starting is stable, and the high-speed and high-precision machining requirements are met.
  • the electric spindle is equipped with a temperature sensor and an encoder (18), which can feedback and monitor the working status of the spindle in time.
  • the circulating cooling system can perform cyclic forced cooling on the body, the bearing housing and the motor, and take away most of the heat generated by the motor and the bearing in a timely and efficient manner to ensure stable and reliable operation of the spindle for a long time.
  • the upper and lower bearings of the electric spindle adopt the same single-row angular contact bearing (GB/T292-1994).
  • the structure of the double-angle contact bearing supporting force shaft, the bearing selection uses high-precision, high-speed, low-noise ceramic ball bearing, by two Only the bearings are installed in pairs, and the middle is separated by the bearing spacers to increase the rigidity of the bearing support, which is beneficial to the heat dissipation of the bearing and the lubrication of the bearing. It can ensure sufficient rigidity of the shaft and the radial direction when the spindle is running at high speed. Machining in different environments.
  • the electric spindle is equipped with an air blown dust cooling structure, which can timely cool the inner cavity of the main shaft and prevent the sewage and cutting chips outside the machine from entering, thereby improving the service life.
  • the electric spindle has an automatic tool change system, which can automatically and automatically replace various required tools accurately, quickly and safely.
  • the drive system adopts DC brushless motor with high power and high torque.
  • the motor is placed in the middle of the two bearings to make the structure more reasonable and compact, and improve the reliability of the electric spindle running at high speed.
  • Figure 1 is a schematic cross-sectional view of the present invention.
  • Fig. 2 is a partial structural view showing the shaft core assembly of the present invention.
  • FIG. 3 is a schematic view showing the structure of the stator of the present invention.
  • FIG. 4 is a schematic view showing the construction of an upper bearing housing assembly and an upper bearing assembly of the present invention.
  • the present invention comprises an aluminum water jacket assembly 3 comprising a tool change cylinder assembly 2 with a pipe joint 1, a power supply line, a gas source hole and a cooling water source interface.
  • the upper bearing lock nut 17 is internally provided with a pneumatic passage and a cooling water passage body assembly 9, wherein the head of the tool change cylinder assembly 2 is fixed in the rear inner cavity of the aluminum water jacket assembly 3, and the body assembly 9
  • the front end fixes the lower body cover 12 and the dust cover 14 , and the shaft core assembly 7 penetrates through the through holes of the upper bearing assembly 6 , the stator 8 and the lower bearing assembly 10 , and the axial through hole of the core assembly 7 is from top to bottom.
  • a pull rod assembly 4, a claw assembly 11 and a shank assembly 13 are provided, wherein the front end of the aluminum water jacket assembly 3 is fixed to the rear portion of the upper bearing housing assembly 5, and the inner through hole of the upper bearing housing assembly 5 is
  • the upper bearing lock nut 17 is fixed with an upper bearing assembly 6, the front end of the upper bearing block assembly 5 is fixed to the rear end of the body assembly 9, the middle portion of the body assembly 9 is fixed with the stator 8, and the body assembly 9 under the stator 8 Lower bearing inner cavity Lower bearing assembly 10, the front end of the lower bearing assembly 10 by a bearing lock nut 15 is fixed to the lower bearing pressure ring 16; rear axle shaft core body core assembly 7 is fixed measuring the rotational speed of the encoder 18.
  • the upper bearing assembly (6) includes a bearing housing outer ring 5.1, and the bearing housing outer ring 5.1 has a bearing housing inner ring 5.3, a bearing housing outer ring 5.1 and a bearing housing inner ring.
  • a water circulation groove 5.2 is provided at the gap between 5.3.
  • the upper bearing assembly 6 includes upper and lower single row angular contact ceramic bearings, and a bearing spacer assembly 6.1 is fixed between the upper and lower bearings.
  • the stator 8 includes a stator punch 8.1, a tie 8.2, a wedge 8.3, a coil winding 8.4, a slot insulating paper 8.5, a temperature sensor 8.6, and a motor lead 8.7, wherein the temperature sensor 8.6 is fixed. At one end of the coil winding 8.4.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turning (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

一种滚珠高速铣削电主轴,包括上轴承座组件(5),上轴承座组件(5)的内贯通孔中由上轴承锁紧螺母(17)固定有上轴承组件(6),上轴承座组件(5)的台阶处前端与机体组件(9)的后端相固定,下轴承组件(10)的前端由下轴承锁紧螺母(15)固定有下轴承压圈(16);轴芯组件(7)的轴芯主体后端固定有测量转速的编码器(18)。该电主轴的转速可调整,而且在高转速下精度高,有足够的轴向、径向刚度,使用寿命长。

Description

一种滚珠高速铣削电主轴
技术领域
本发明涉及一种机械加工设备, 具体地说是集成滚动轴承、 冷却装置、 自 动换刀系统、 电机驱动于一体的机电一体化的主轴装置。
背景技术
在现有技术中, 一般的电主轴用的定子使用非变频电源, 因此转子工作转 数不可变动, 功能单一, 且疾速起动下转子容易损坏, 影响电主轴的使用寿命, 另外, 对于特殊带铣削功能要求的电主轴, 轴承提供的支承力不足, 使主轴高 速运转时轴向与径向有足够的刚度。 再者, 铣削时很多诸如污水、 切削屑等杂 物容易进入主轴, 使主轴内部堵塞, 严重影响主轴使用寿命。
发明内容
本发明涉及一种滚珠高速铣削电主轴, 它解决了现有技术的不足。
本发明技术解决方案是包括有带管接头(1 )的换刀气缸组件(2), 电源线、 气源孔及冷却水源接口的铝水套组件 (3 ), 上轴承锁紧螺母 (17), 内部设有气 路通道和冷却水通道的机体组件 (9), 其中, 换刀气缸组件 (2) 的头部固定在 设置铝水套组件 (3 ) 的后部内腔中, 机体组件 (9) 前端固定有机体下盖 (12) 及防尘盖 (14), 有轴芯组件 (7) 贯通于上轴承组件 (6)、 定子 (8) 及下轴承 组件(10)的通孔中,轴芯组件(7 )的轴向通孔中自上而下设置有拉杆组件(4)、 拉爪组件 (11 ) 及刀柄组件 (13 ), 其特征在于, 铝水套组件 (3 ) 的前端与上 轴承座组件 (5 ) 的后部相固定, 上轴承座组件 (5 ) 的内贯通孔中由上轴承锁 紧螺母 (17) 固定有上轴承组件 (6), 上轴承座组件 (5 ) 的台阶处前端与机体 组件 (9) 的后端相固定, 机体组件 (9) 的中部固定有定子 (8), 定子 (8) 之 下的机体组件 (9) 的下轴承内腔中固定有下轴承组件 (10), 下轴承组件 (10) 的前端由下轴承锁紧螺母 (15 ) 固定有下轴承压圈 (16); 轴芯组件 (7 ) 的轴 芯主体后端固定有测量转速的编码器 (18 )。 本发明特别在于所述的轴芯组件(7) 的轴芯主体上轴肩套(7.2)这下的转 轴段 (7.1) 固定有铜鼠笼转子 (7.3)。
以上本发明所述的上轴承组件 (6) 包括有轴承座外圈 (5.1), 轴承座外圈 (5.1) 内腔中固定有轴承座内圈(5.3), 轴承座外圈(5.1)与轴承座内圈(5.3) 之间的间隙处设有水循环槽 (5.2)。
所述上轴承组件(6)包括有上、 下单列角接触陶瓷轴承, 上下轴承间固定 有轴承隔套组件 (6.1)。
所述的定子 (8)包括有定子冲片 (8.1)、 帮扎带(8.2)、 槽楔(8.3)、 线圈 绕组 (8.4)、 槽绝缘纸 (8.5)、 温度传感器 (8.6) 和电机引线 (8.7), 其中温度 传感器 (8.6) 固定在线圈绕组 (8.4) 的一端。
本发明工作原理是:
1、 电主轴高速转动结构, 主要由上轴承座组件 (5)、 上轴承组件 (6)、 轴 芯组件 (7)、 机体组件 (9)、 下轴承组件 (10) 组成, 采用精密、 高速滚珠角 接触轴承, 最高转速可达 32000 rpm, 振动和噪音都很小。
2、 冷却原理: 机体组件 (9) 的机体上沿圆周均布若干个水孔, 与机体下 盖 (12) 的水槽构成冷却循环, 电主轴工作时, 从铝水套组件 (3) 的进水孔通 入冷却水,随进入上轴承座组件 (5)、 机体组件 (9) 和机体下盖 (12), 随后冷 却水在机体内沿圆周循环流动, 最后再从上轴承座组件 (5) 和铝水套组件 (3) 排出, 带走电机和轴承产生的大部分热量, 保持整机在低温下稳定、 可靠运行。
3、 吹尘原理: 电主轴工作时, 铝水套组件 (3) 的进气孔通入压縮空气, 随进入上轴承座组件 (5)、 机体组件 (9) 和机体下盖 (12), 最后到轴芯组件
(7) 的内孔, 然后排出机体外, 完成吹尘降温过程, 可吹掉轴心内的尘埃, 带 走高速旋转的轴承和电机工作时而产生的一部分热量; 同时, 阻止机体外的污 水、 切削屑、 气体等进入主轴;
4、 轴芯旋转原理: 该电主轴采用永磁直流电机, 转子主部件采用若干块永 磁体, 集成在轴芯的外圆上, 永磁体的外圆上再裹一层碳纤维, 当在电机定子
( 8 ) 端通符合要求的三相交流变频电源时, 由于电磁感应原理, 转子转动, 驱 动轴芯组件 (7 ) 高速旋转, 使安装在轴芯组件 (7 ) 下部的刀柄组件 (13 ) 夹 持各种刀具进行高效率、 高精度的切削加工, 并可根据具体工作要求选择 0-32000 rpm的不同工作转速。
5、 换刀原理: 当需要进行刀具更换时, 停止运转主轴, 给气缸顶部的管接 头 (1 ) 进气及铝水套组件 (3 ) 进气口分别通入压縮空气, 迫使换刀汽缸组件
(2) 的活塞杆向下运动, 从而推动拉杆组件 (4 ) 下移, 同时, 拉杆组件 (4 ) 的压縮碟簧的碟簧复位, 使拉杆组件 (4) 和滑动芯向上移动, 拉爪组件 (11 ) 在弹簧的推力与滑动芯的作用下, 滑入刀柄内孔并张开, 此时铝水套组件 (3 ) 的吹尘进气关闭, 刀柄处于拉刀状态。
本发明的优点在于:
1、 工作时利用变频电源的频率调节, 可使工作转数可在 0-32000rpm变动, 起动平稳, 满足高转速、 高精度机械加工要求。
2、 电主轴内装有温度传感器和编码器 (18 ) , 可及时反馈、 监控主轴工作 状态。
3、 采用循环冷却系统可对机体、 轴承座及电机等进行循环强迫冷却, 及时 高效的带走电机和轴承产生的大部分热量, 保证主轴长时间稳定、 可靠地工作。
4、 电主轴上下轴承均采用相同的单列角接触轴承 (GB/T292-1994) 的双角 接触轴承支承力轴的结构, 轴承选取上使用高精度、 高转速、 低噪音陶瓷球轴 承, 由两只轴承成对安装, 中间并由轴承隔套隔开, 以增加轴承支撑刚度, 有 利于轴承散热和便于轴承润滑等优点, 可保证主轴高速运转时轴向与径向有足 够的刚度, 可在不同的环境下进行机械加工。
5、 电主轴设有空气吹尘冷却结构, 可对主轴内腔进行及时冷却及阻止机体 外的污水、 切削屑等进入, 提高使用寿命。 6、 电主轴设有自动换刀系统, 可实现准确、 快速、 安全地自动更换各种所 需刀具。
7、 驱动系统采用直流无刷电机,功率大, 扭矩高; 电机置于两轴承中部, 使 结构更合理、 紧凑,提高电主轴在高速下运转的可靠性。
附图说明
图 1是本发明的剖面构造示意图。
图 2是本发明的轴芯组件部分构造示意图。
图 3是本发明的定子构造示意图。
图 4是本发明的上轴承座组件及上轴承组件构造示意图。
具体实施方式
实施例 1
根据图 1、 图 2、 图 3及图 4所示, 本发明在现有的包括有带管接头 1的换 刀气缸组件 2, 电源线、 气源孔及冷却水源接口的铝水套组件 3, 上轴承锁紧螺 母 17, 内部设有气路通道和冷却水通道的机体组件 9, 其中, 换刀气缸组件 2 的头部固定在设置铝水套组件 3的后部内腔中, 机体组件 9前端固定有机体下 盖 12及防尘盖 14, 有轴芯组件 7贯通于上轴承组件 6、定子 8及下轴承组件 10 的通孔中, 轴芯组件 7的轴向通孔中自上而下设置有拉杆组件 4、 拉爪组件 11 及刀柄组件 13, 其特征在于, 铝水套组件 3的前端与上轴承座组件 5的后部相 固定,上轴承座组件 5的内贯通孔中由上轴承锁紧螺母 17固定有上轴承组件 6, 上轴承座组件 5的台阶处前端与机体组件 9的后端相固定, 机体组件 9的中部 固定有定子 8, 定子 8之下的机体组件 9的下轴承内腔中固定有下轴承组件 10, 下轴承组件 10的前端由下轴承锁紧螺母 15固定有下轴承压圈 16; 轴芯组件 7 的轴芯主体后端固定有测量转速的编码器 18。
实施例 2
与实施例 1相同,只是所述的轴芯组件 7的轴芯主体上轴肩套 7.2这下的转 轴段 7.1固定有铜鼠笼转子 7.3。
实施例 3
与实施例 1相同, 只是所述的上轴承组件 (6 ) 包括有轴承座外圈 5.1, 轴 承座外圈 5.1内腔中固定有轴承座内圈 5.3,轴承座外圈 5.1与轴承座内圈 5.3之 间的间隙处设有水循环槽 5.2。
实施例 4
与实施例 1相同, 只是所述上轴承组件 6包括有上、 下单列角接触陶瓷轴 承, 上下轴承间固定有轴承隔套组件 6.1。
实施例 5
与实施例 1相同, 只是所述的定子 8包括有定子冲片 8.1、 帮扎带 8.2、 槽 楔 8.3、 线圈绕组 8.4、 槽绝缘纸 8.5、 温度传感器 8.6和电机引线 8.7, 其中温度 传感器 8.6固定在线圈绕组 8.4的一端。

Claims

1、一种滚珠高速铣削电主轴,它包括有带管接头(1)的换刀气缸组件(2), 电源线、 气源孔及冷却水源接口的铝水套组件 (3), 上轴承锁紧螺母 (17), 内 部设有气路通道和冷却水通道的机体组件 (9), 其中, 换刀气缸组件 (2) 的头 部固定在设置铝水套组件 (3) 的后部内腔中, 机体组件 (9) 前端固定有机体 下盖(12)及防尘盖(14), 有轴芯组件(7) 贯通于上轴承组件(6)、 定子(8) 及下轴承组件 (10) 的通孔中, 轴芯组件 (7) 的轴向通孔中自上而下设置有拉 杆组件 (4)、 拉爪组件 (11) 及刀柄组件 (13), 其特征在于, 铝水套组件 (3) 的前端与上轴承座组件 (5) 的后部相固定, 上轴承座组件 (5) 的内贯通孔中 由上轴承锁紧螺母 (17) 固定有上轴承组件 (6), 上轴承座组件 (5) 的台阶处 前端与机体组件 (9) 的后端相固定, 机体组件 (9) 的中部固定有定子 (8), 定子 (8) 之下的机体组件 (9) 的下轴承内腔中固定有下轴承组件 (10), 下轴 承组件 (10) 的前端由下轴承锁紧螺母 (15) 固定有下轴承压圈 (16); 轴芯组 件 (7) 的轴芯主体后端固定有测量转速的编码器 (18)。
2、 根据权利要求 1所述的一种滚珠高速铣削电主轴, 其特征在于本发明特 别在于所述的轴芯组件 (7) 的轴芯主体上轴肩套 (7.2) 这下的转轴段 (7.1) 固定有铜鼠笼转子 (7.3)。
3、 根据权利要求 1所述的一种滚珠高速铣削电主轴, 其特征在于所述的上 轴承组件 (6) 包括有轴承座外圈 (5.1), 轴承座外圈 (5.1) 内腔中固定有轴承 座内圈 (5.3), 轴承座外圈 (5.1) 与轴承座内圈 (5.3) 之间的间隙处设有水循 环槽 (5.2)。
4、 根据权利要求 1所述的一种滚珠高速铣削电主轴, 其特征在于所述上轴 承组件 (6) 包括有上、 下单列角接触陶瓷轴承, 上下轴承间固定有轴承隔套组 件 (6.1)。
5、 根据权利要求 1所述的一种滚珠高速铣削电主轴, 其特征在于所述的定 子 (8) 包括有定子冲片 (8.1)、 帮扎带 (8.2)、 槽楔 (8.3)、 线圈绕组 (8.4)、 槽绝缘纸 (8.5)、 温度传感器 (8.6) 和电机引线 (8.7), 其中温度传感器 (8.6) 固定在线圈绕组 (8.4) 的一端。
PCT/CN2012/081074 2011-11-26 2012-09-06 一种滚珠高速铣削电主轴 WO2013075532A1 (zh)

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