WO2022151617A1 - Motor spindle and machine tool - Google Patents

Motor spindle and machine tool Download PDF

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Publication number
WO2022151617A1
WO2022151617A1 PCT/CN2021/092213 CN2021092213W WO2022151617A1 WO 2022151617 A1 WO2022151617 A1 WO 2022151617A1 CN 2021092213 W CN2021092213 W CN 2021092213W WO 2022151617 A1 WO2022151617 A1 WO 2022151617A1
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WO
WIPO (PCT)
Prior art keywords
rear bearing
cooling medium
medium flow
flow channel
bearing seat
Prior art date
Application number
PCT/CN2021/092213
Other languages
French (fr)
Chinese (zh)
Inventor
符东川
刘汉忠
汤丽君
汤秀清
Original Assignee
广州市昊志机电股份有限公司
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Filing date
Publication date
Application filed by 广州市昊志机电股份有限公司 filed Critical 广州市昊志机电股份有限公司
Publication of WO2022151617A1 publication Critical patent/WO2022151617A1/en

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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
    • 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
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/12—Arrangements for cooling or lubricating parts of the machine
    • B23Q11/126—Arrangements for cooling or lubricating parts of the machine for cooling only
    • B23Q11/127—Arrangements for cooling or lubricating parts of the machine for cooling only for cooling motors or spindles

Definitions

  • the invention is used in the fields of turning and boring, and particularly relates to an electric spindle and a machine tool.
  • Compound machining is the realization of several different machining processes such as turning, boring, drilling, and milling on one machine tool.
  • the workpiece can complete most or all of the machining processes such as turning, boring, drilling, and milling in one clamping, thereby improving the machining accuracy of the parts and the machining efficiency of the machine tool.
  • the turning-milling composite motorized spindle needs to provide a large cutting force, so the design requirements of the motor are high power and high torque. Since the bearings used in this type of spindle are all high-load bearings, the heat generation is much larger than that of ordinary bearings. The heating of the motor and the self-heating of the bearing cause the temperature of the bearing to increase sharply. However, because the rear bearing is a floating end bearing, it is difficult to achieve The same cooling effect as the front bearing greatly affects the service life of the rear bearing.
  • the uncooled rear bearing housing is thermally expanded, and the cooled rear bearing housing housing shrinks, which leads to the destruction of the fitting effect and affects the bearing preload.
  • the bearing span of the existing motorized spindle is long, which cannot meet the length limitation requirement of the turning and milling motorized spindle on the machine tool.
  • the purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide an electric spindle and a machine tool.
  • an electric spindle includes:
  • the body assembly is provided with a front bearing seat assembly and a rear bearing seat assembly;
  • axle core assembly the front end is supported on the front bearing seat assembly through a front bearing, and the rear end is supported on the rear bearing seat assembly through a rear bearing;
  • the rear bearing seat assembly includes a rear bearing seat outer shell and a rear bearing seat, the rear bearing seat outer shell is connected with the body assembly, the outer ring of the rear bearing is supported on the rear bearing seat, and the rear bearing
  • the seat is matched with the outer shell of the rear bearing seat, the rear bearing seat can float relative to the outer shell of the rear bearing seat in the axial direction, the outer shell of the rear bearing seat is provided with a first cooling medium flow channel, and the rear bearing seat is provided with There is a second cooling medium flow channel, the first cooling medium flow channel is communicated with the second cooling medium flow channel; the front bearing seat assembly is provided with a third cooling medium flow channel.
  • a connecting pipe is further included, the connecting pipe is axially arranged and assembled between the rear bearing housing outer shell and the rear bearing housing, the connecting pipe connects the The first cooling medium flow channel is communicated with the second cooling medium flow channel, and the connecting pipe is movably matched with the outer casing of the rear bearing seat and/or the rear bearing seat to realize floating connection.
  • the rear bearing housing is provided with a first axial insertion hole communicating with the first cooling medium flow channel
  • the rear bearing The seat is provided with a second axial insertion hole that communicates with the second cooling medium flow channel, and one end of the connecting pipe is assembled to the first axial insertion hole and interferes with the first axial insertion hole.
  • the other end of the connecting pipe is assembled to the second axial insertion hole, and is in clearance fit with the second axial insertion hole.
  • the rear bearing housing includes a first part and a second part, the first part and the second part are both annular, and the The first part is located radially inside the rear bearing housing shell, the second part is axially located behind the rear bearing housing shell, and the connecting pipe is arranged between the second part and the rear bearing Between the seat jackets, the second cooling medium flow channel is arranged on the first component.
  • a rolling sleeve is provided between the rear bearing housing outer shell and the first component.
  • the rear end of the first component is provided with a second annular groove
  • the second component cooperates with the first component and shields the The second ring groove
  • the front end of the first part is provided with a third ring groove
  • the rear bearing seat further includes a third part
  • the third part cooperates with the first part and shields the third ring
  • the second annular groove and the third annular groove communicate with each other through an axial hole, and the second annular groove and the third annular groove form the second cooling medium flow channel.
  • a first annular groove is defined on the outer wall of the rear bearing housing outer wall, the body component is matched with the rear bearing housing outer housing, and the The body assembly shields the first annular groove to form the first cooling medium flow channel.
  • the body assembly is provided with a fourth cooling medium flow channel, the fourth cooling medium flow channel and the second cooling medium flow channel
  • the third cooling medium flow channel is communicated with the first cooling medium flow channel, and the cooling medium sequentially flows through the third cooling medium flow channel, the first cooling medium flow channel, and the second cooling medium flow channel.
  • a headstock is further included, a spiral ring groove is provided on the outer peripheral surface of the body assembly, and the body assembly is assembled in the headstock,
  • the spindle box shields the spiral ring groove to form the fourth cooling medium flow channel, the spindle box is provided with a water inlet hole that communicates with the third cooling medium flow channel, and the spindle box is provided with a water inlet hole communicating with the third cooling medium flow channel.
  • the water outlet holes communicated with the fourth cooling medium flow channels.
  • a machine tool includes the electric spindle according to any one of the implementations of the first aspect.
  • the front bearing is cooled by the third cooling medium flow channel, and the rear bearing seat and the outer casing of the rear bearing seat are provided with cooling medium flow channels.
  • the rear bearing can be cooled directly through the rear bearing seat, which can achieve the same cooling effect as the front bearing. service life of the rear bearing.
  • the temperature difference between the two will not be large, avoiding the thermal expansion of the uncooled rear bearing housing and the shrinking of the cooled rear bearing housing jacket, thereby To avoid damage to the matching effect, ensure the preload of the bearing.
  • the bearing can be placed in the inner hole of the body assembly to shorten the bearing span of the spindle, so that the electric spindle can better meet the length limit requirements of the turning and milling electric spindle on the machine tool.
  • the rear bearing seat has a cooling medium flow channel
  • the rear bearing can be selected in a smaller type bearing that meets the load, which not only reduces the cost, but also reduces the rotational inertia of the main shaft, and reduces the acceleration and deceleration time of the main shaft.
  • FIG. 1 is a schematic structural diagram of an embodiment of the present invention
  • FIG. 2 is a partial enlarged view of part A in FIG. 1 .
  • “several” means one or more, “multiple” means two or more, “greater than”, “less than”, “exceeding”, etc. are understood as not including this number; “above”, “below” and “within” “ etc. are understood to include the original number.
  • “first” and “second” are only used for the purpose of distinguishing technical features, it should not be understood as indicating or implying relative importance or implying the number of indicated technical features or Implicitly indicates the order of the indicated technical features.
  • words such as “set”, “install” and “connect” should be understood in a broad sense, for example, it may be directly connected or indirectly connected through an intermediate medium; it may be a fixed connection or a
  • the detachable connection can also be integrally formed; it can be a mechanical connection or an electrical connection or can communicate with each other; it can be the internal communication between the two elements or the interaction relationship between the two elements.
  • FIG. 1 shows the reference direction of the embodiment of the present invention, and the following describes the embodiment of the present invention with reference to the direction shown in FIG. 1 .
  • an embodiment of the present invention provides an electric spindle, including a body assembly 1 and a shaft core assembly 2, the body assembly 1 is provided with a front bearing seat assembly 5 and a rear bearing seat assembly 3, and the front end of the shaft core assembly 2 passes through the front
  • the bearing 6 is supported on the front bearing seat assembly 5
  • the rear end is supported on the rear bearing seat assembly 3 through the rear bearing 4 .
  • the shaft core assembly 2 includes a shaft core and a rotor
  • the body assembly 1 includes a body and a stator
  • one or more front bearings 6 and rear bearings 4 are respectively provided as required, and the shaft core assembly 2 can be driven in the body assembly 1 by the rotor and stator. , and output torque at the front end of the body assembly 1.
  • the rear bearing seat assembly 3 includes a rear bearing seat outer shell 31 and a rear bearing seat 32, the rear bearing seat outer shell 31 is connected with the body assembly 1, the outer ring of the rear bearing 4 is supported on the rear bearing seat 32, and the rear bearing
  • the inner ring of 4 is matched with the shaft core assembly 2
  • the rear bearing seat 32 is matched with the rear bearing seat outer shell 31, and the rear bearing seat 32 can float axially relative to the rear bearing seat outer shell 31 to form a floating end bearing structure.
  • the rear bearing housing jacket 31 is provided with a first cooling medium flow channel 33 , and the first cooling medium flow channel 33 can pass through cooling medium such as cooling water, so as to realize cooling of the rear bearing housing jacket 31 .
  • the rear bearing seat 32 is provided with a second cooling medium flow channel 34 , and the second cooling medium flow channel 34 can pass through a cooling medium such as cooling water, so as to realize cooling of the rear bearing seat 32 .
  • the first cooling medium flow channel 33 is communicated with the second cooling medium flow channel 34, and cooling medium such as cooling water flows through the first cooling medium flow channel 33 and the second cooling medium flow channel 34, so as to ensure the cooling of the outer casing of the bearing housing after cooling
  • the medium can also be cooled to the rear bearing seat 32 , and the first cooling medium flow channel 33 and the second cooling medium flow channel 34 can jointly cool the rear bearing seat assembly 3 and more fully take away the heat generated during the operation of the rear bearing.
  • the front bearing seat assembly 5 is provided with a third cooling medium flow channel 51 , and the third cooling medium flow channel 51 can pass a cooling medium such as cooling water to achieve cooling of the front bearing 6 .
  • the invention solves many problems caused by insufficient and uneven cooling of the bearing, prolongs the service life of the front bearing and the rear bearing, and avoids affecting the preload of the bearing.
  • the flow channel 34 can be connected by a deformed hose, a floating joint or the like.
  • the rear bearing seat assembly 3 further includes a connecting pipe 35 , which is axially arranged and assembled between the rear bearing seat outer shell 31 and the rear bearing seat 32 .
  • 35 connects the first cooling medium flow channel 33 and the second cooling medium flow channel 34, and the connecting pipe 35 is movably matched with the rear bearing housing shell 31 and/or the rear bearing housing 32 to realize floating connection.
  • the connecting tube 35 can be fixedly connected with the rear bearing housing 31, and then movably cooperate with the rear bearing housing 32; the connecting tube 35 can also be fixedly connected with the rear bearing housing 32, and then movably fit with the rear bearing housing housing 31; The two ends of the tube 35 can also be movably matched with the rear bearing seat 32 and the rear bearing seat outer shell 31 respectively.
  • the floating connection structure formed by the connecting pipe 35 ensures that the first cooling medium flow channel 33 and the second cooling medium flow channel 34 communicate with each other without being affected by the floating of the bearing, so that the cooling medium of the outer bearing housing after cooling can also be cooled to the rear. Bearing housing 32 .
  • the rear bearing housing 31 is provided with a first axial insertion hole communicating with the first cooling medium flow channel 33
  • the rear bearing housing 32 is provided with a second cooling medium
  • the second axial insertion hole communicated with the medium flow channel 34
  • one end of the connecting pipe 35 is assembled in the first axial insertion hole, and has an interference fit with the first axial insertion hole
  • the other end of the connecting pipe 35 is assembled in the second axial insertion hole
  • the connecting pipe 35 and the rear bearing seat 32 are fitted with a large gap to ensure that the floating of the bearing is not affected, so as to ensure that the cooling water of the rear bearing seat jacket can also be cooled to Rear bearing housing 32 .
  • connection pipes 35 is determined according to the needs of water inlet and outlet, for example, two or more.
  • a sealing ring 36 is provided between the connecting pipe 35 and the first axial insertion hole and the second axial insertion hole.
  • the sealing ring 36 between the connecting pipe 35 and the second axial insertion hole can not only ensure the sealing performance, but also ensure that the connecting pipe 35 can float relative to the rear bearing seat 32 without being affected.
  • the rear bearing seat 32 includes a first part 37 and a second part 38 , and both the first part 37 and the second part 38 are annular.
  • the first part 37 extends in the axial direction to form a cylindrical shape
  • the first part 37 is located radially on the inner side of the rear bearing housing shell 31
  • the rear bearing 4 is assembled to the first part 37
  • the second cooling medium flow channel 34 is provided
  • the cooling medium in the second cooling medium flow channel 34 directly cools the first part 37 , which greatly improves the cooling effect on the rear bearing 4 .
  • the second part 38 extends radially to form a circular flange shape.
  • the second part 38 is located at the rear of the rear bearing housing shell 31 in the axial direction.
  • the second part 38 of the rear bearing housing 32 and the rear bearing housing shell 31 are axially arranged. Distribution, the connecting pipe 35 is arranged between the second part 38 and the rear bearing housing shell 31, and the rear bearing housing 32 realizes the first cooling medium flow channel 33 and the second cooling medium flow channel 34 through the holes opened in the second part 38 The connection ensures that the cooling of the bearing is not affected by the floating of the bearing.
  • a rolling sleeve 39 is provided between the rear bearing housing shell 31 and the first part 37 .
  • the rolling sleeve 39 ensures the reliable floating performance of the main shaft, but due to the thermal conductivity of the rolling sleeve 39 This leads to higher requirements for the cooling and preloading of the bearing.
  • the first cooling medium flow channel 33 and the second cooling medium flow channel 34 that communicate with each other bypass the rolling sleeve 39 to achieve sufficient cooling for the bearing, which greatly reduces the Improved bearing cooling and preload.
  • a preload spring 310 is provided between the rear bearing housing shell 31 and the second part 38 , and the preload spring 310 exerts an axial preload force on the rear bearing housing 32 .
  • an installation groove may be provided on the rear bearing housing shell 31 or the second component 38 for accommodating the preload spring 310 .
  • the first cooling medium flow channel 33 surrounds the rear bearing housing shell 31 for one or more circles.
  • the first cooling medium flow channel 33 may be formed by opening or slotting, and the first cooling medium flow channel 33 may be provided with A meandering S shape or a simple annular shape, for example, in some embodiments shown in FIGS. 1 and 2 , a first annular groove is provided on the outer wall of the rear bearing housing shell 31, and the rear bearing housing shell 31 is embedded in the body assembly 1.
  • the assembly 1 is matched with the rear bearing housing shell 31 , and the body assembly 1 shields the first annular groove to form the first cooling medium flow channel 33 .
  • the body assembly 1 has holes at corresponding positions, and the cooling medium has been introduced into or led out of the first cooling medium flow channel 33 .
  • the structural form of forming the first cooling medium flow channel 33 through the first annular groove greatly reduces the difficulty of machining the first cooling medium flow channel 33 on the outer casing 31 of the rear bearing seat.
  • the second cooling medium flow channel 34 surrounds the rear bearing seat 32 for one or more circles.
  • the second cooling medium flow channel 34 may be formed by opening or slotting, and the second cooling medium flow channel 34 may be arranged in a circuitous S shape or A simple ring shape, for example, in some embodiments shown in FIGS.
  • the rear end of the first part 37 is provided with a second ring groove 311
  • the second part 38 cooperates with the first part 37 and shields the second ring groove 311
  • the front end of the first part 37 is provided with a third ring groove 312
  • the rear bearing seat 32 also includes a third part 313, the third part 313 cooperates with the first part 37 and covers the third ring groove 312, in addition, the third part
  • the 313 also provides axial stops for the outer race of the rear bearing.
  • the second annular groove 311 and the third annular groove 312 communicate with each other through the axial hole 314
  • the second annular groove 311 and the third annular groove 312 form two second cooling medium flow passages 34 .
  • the second component 38 is provided with holes to conduct the first cooling medium flow channel 33 and the second cooling medium flow channel 34 .
  • the first part 37 , the second part 38 and the third part 313 are connected as a whole after the corresponding holes or grooves are provided, thereby greatly reducing the difficulty of manufacturing the two cooling medium flow passages on the rear bearing seat 32 , and at the same time ensuring Cooling effect of rear bearing 4.
  • the cooling liquid is input from the body assembly 1, and then flows to the outer casing of the rear bearing seat.
  • there are two cooling water channels one of which is the first cooling medium flow channel 33, and the first cooling medium flow channel 33 surrounds the rear bearing.
  • the seat jacket 31 flows to the opposite side, the other one flows into the rear bearing seat 32 through the connecting pipe 35, and then flows to the opposite side through the second cooling medium flow channel 34 to surround the cooling rear bearing seat 32, and then is led out through the connecting pipe 35, and is connected with the first cooling medium flow channel 34.
  • the cooling medium flow channels 33 meet and flow out, and the two channels cool the rear bearing housing jacket and the rear bearing housing 32 respectively.
  • the body assembly 1 is provided with a fourth cooling medium flow channel 11, the fourth cooling medium flow channel 11 is located outside the stator, and the fourth cooling medium flow channel 11 can pass through cooling medium such as cooling water, In order to achieve cooling of the stator and dissipate the heat generated by the high-power motor in time.
  • the cooling medium flow channel of the front bearing seat assembly 5 , the cooling medium flow channel of the rear bearing seat assembly 3 and the cooling medium flow channel of the body assembly 1 can be arranged independently or communicated with each other.
  • the fourth cooling medium flow channel 11 communicates with the second cooling medium flow channel 34
  • the third cooling medium flow channel 51 communicates with the first cooling medium flow channel 33
  • the cooling medium enters the electric spindle and flows through the third cooling medium flow channel 51 , the first cooling medium flow channel 33 , the second cooling medium flow channel 34 and the fourth cooling medium flow channel 11 in sequence. It can effectively cool the components that generate heat during the working process of the spindle. Because the most important heating component of the electric spindle of the machining center is the stator, the temperature of the stator will increase a lot after the cooling medium is cooled, and the bearing will be cooled first so that the bearing can be fully cooled. Therefore, The cooling sequence of the cooling medium designed by the present invention is to first cool the front bearing, then cool the rear bearing, and finally cool the stator.
  • the fourth cooling medium flow channel 11 can be arranged in a detoured S shape, a spiral shape or a simple annular shape along the outer wall of the body assembly.
  • the electro-spindle further includes a headstock 7, the outer peripheral surface of the body assembly is provided with a spiral ring groove, the body assembly is assembled in the headstock 7, the headstock 7 matches the body assembly, and the headstock 7 The spiral ring groove is shielded to form the fourth cooling medium flow channel 11 , the headstock 7 is provided with a water inlet hole 71 that communicates with the third cooling medium flow channel 51 , and the headstock 7 is provided with the fourth cooling medium flow channel 11 communicated with The water outlet hole 72.
  • the cooling also only enters the first loop 1 of the body assembly from the water inlet hole 71 of the headstock 7.
  • the first loop 1 surrounds the front end outer wall of the body assembly, and then enters the radial hole 2 after going around the body assembly once.
  • the third cooling medium flow channel 51 circles the front bearing seat assembly 5 once, and then flows into the cooling water hole of the body assembly through the radial hole 3, and then flows to the rear bearing housing. At this time, there are two cooling water channels, and one surrounds the rear bearing housing housing.
  • the first cooling medium flow channel 33 flows to the outlet position 5 of the first cooling medium flow channel 33 on the opposite side, the other one flows into the rear bearing seat through the connecting pipe, and is cooled by the second cooling medium flow channel 34 from the opposite side It flows through the connecting pipe to the outlet position 5 of the first cooling medium flow channel 33, and the two channels cool the rear bearing shell and the rear bearing seat respectively, and flow from 5 through the cooling water hole of the body assembly to the front end of the body assembly, and out of the body assembly, Around the body assembly to 6, through 6 around the body assembly to 7, through 7 around the body assembly to 8, through 8 around the body assembly to 9, through 9 around the body assembly to 10, through 10 around the body assembly to reach the water outlet 72.
  • Embodiments of the present invention also provide a machine tool, including the electric spindle in any of the above embodiments, for turning, boring, drilling, milling, and the like.
  • Both the rear bearing seat 32 and the rear bearing seat outer shell 31 are provided with cooling medium flow channels, and the rear bearing 4 can be cooled directly by the rear bearing seat 32 , which can achieve the same cooling effect as the front bearing, thereby prolonging the service life of the rear bearing 4 .
  • the bearing can be placed in the inner hole of the body assembly 1 to shorten the bearing span of the main shaft, so that the electric spindle can better meet the length limit requirements of the turning and milling electric spindle on the machine tool.
  • the rear bearing 4 can be selected as a smaller type bearing that meets the load, which not only reduces the cost, but also reduces the rotational inertia of the main shaft, and reduces the acceleration and deceleration time of the main shaft.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Turning (AREA)

Abstract

A motor spindle and a machine tool, comprising: a motor assembly, provided with a front bearing seat assembly and a rear bearing seat assembly; and a shaft core assembly, having a front end supported on the front bearing seat assembly by means of a front bearing, and a rear end supported on the rear bearing seat assembly by means of a rear bearing. The rear bearing seat assembly comprises a rear bearing seat outer sleeve and a rear bearing seat; the rear bearing seat outer sleeve is connected to the motor assembly; an outer ring of the rear bearing is supported on the rear bearing seat; the rear bearing seat is fitted with the rear bearing seat outer sleeve; the rear bearing seat can float axially with respect to the rear bearing seat outer sleeve; the rear bearing seat outer sleeve is provided with a first cooling medium flow channel, the rear bearing seat is provided with a second cooling medium flow channel, and the first cooling medium flow channel is communicated with the second cooling medium flow channel; the front bearing seat assembly is provided with a third cooling medium flow channel. The rear bearing can realize the same cooling effect as the front bearing, thereby prolonging the service life of the rear bearing.

Description

一种电主轴和机床An electric spindle and machine tool 技术领域technical field
本发明用于车削、镗削领域，特别是涉及一种电主轴和机床。The invention is used in the fields of turning and boring, and particularly relates to an electric spindle and a machine tool.
背景技术Background technique
复合加工就是把车削、镗削、钻削、铣削等几种不同的加工工艺在一台机床上实现，是目前机械加工领域较为流行的加工工艺，而属车铣复合加工应用最为广泛。工件在一次装夹中可完成车削、镗削、钻削、铣削等大部分或者全部加工工序，从而提高零件加工精度和机床的加工效率。Compound machining is the realization of several different machining processes such as turning, boring, drilling, and milling on one machine tool. The workpiece can complete most or all of the machining processes such as turning, boring, drilling, and milling in one clamping, thereby improving the machining accuracy of the parts and the machining efficiency of the machine tool.
车铣复合电主轴需要提供大的切削力，因此电机的设计需求是大功率大扭矩，大功率电机必然会产生很大的热量，这部分热量会传递到前后轴承，使得轴承发热增大，同时由于该类型主轴使用的轴承都属于高承载的轴承发热量远大于普通承载的轴承，电机发热与轴承自身发热使得轴承部位的温度急剧增加，但由于后端的轴承属于浮动端轴承，很难做到跟前轴承一样的冷却效果，大大影响后轴承的使用寿命。The turning-milling composite motorized spindle needs to provide a large cutting force, so the design requirements of the motor are high power and high torque. Since the bearings used in this type of spindle are all high-load bearings, the heat generation is much larger than that of ordinary bearings. The heating of the motor and the self-heating of the bearing cause the temperature of the bearing to increase sharply. However, because the rear bearing is a floating end bearing, it is difficult to achieve The same cooling effect as the front bearing greatly affects the service life of the rear bearing.
而且，由于上轴承座和上轴承座外套存在较大温差，没有冷却的后轴承座受热膨胀，受冷却的后轴承座外套缩小，从而导致配合效果被破坏，影响轴承的预紧。Moreover, due to the large temperature difference between the upper bearing housing and the outer housing of the upper bearing housing, the uncooled rear bearing housing is thermally expanded, and the cooled rear bearing housing housing shrinks, which leads to the destruction of the fitting effect and affects the bearing preload.
此外，现有的电主轴的轴承跨距较长，不能够满足车铣电主轴在机床上的长度限制要求。In addition, the bearing span of the existing motorized spindle is long, which cannot meet the length limitation requirement of the turning and milling motorized spindle on the machine tool.
发明内容SUMMARY OF THE INVENTION
本发明的目的在于至少解决现有技术中存在的技术问题之一，提供一种电主轴和机床。The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide an electric spindle and a machine tool.
本发明解决其技术问题所采用的技术方案是：The technical scheme adopted by the present invention to solve its technical problems is:
第一方面，一种电主轴，包括：In a first aspect, an electric spindle includes:
机体组件，设有前轴承座组件和后轴承座组件；The body assembly is provided with a front bearing seat assembly and a rear bearing seat assembly;
轴芯组件，前端通过前轴承支承于所述前轴承座组件，后端通过后轴承支承于所述后轴承座组件；an axle core assembly, the front end is supported on the front bearing seat assembly through a front bearing, and the rear end is supported on the rear bearing seat assembly through a rear bearing;
其中，所述后轴承座组件包括后轴承座外套和后轴承座，所述后轴承座外套与所述机体组件连接，所述后轴承的外圈支承于所述后轴承座，所述后轴承座与所述后轴承座外套配合，所述后轴承座能够相对于所述后轴承座外套沿轴向浮动，所述后轴承座外套设有第一冷却介质流道，所述后轴承座设有第二冷却介质流道，所述第一冷却介质流道和第二冷却介质流道相连通；所述前轴承座组件设有第三冷却介质流道。Wherein, the rear bearing seat assembly includes a rear bearing seat outer shell and a rear bearing seat, the rear bearing seat outer shell is connected with the body assembly, the outer ring of the rear bearing is supported on the rear bearing seat, and the rear bearing The seat is matched with the outer shell of the rear bearing seat, the rear bearing seat can float relative to the outer shell of the rear bearing seat in the axial direction, the outer shell of the rear bearing seat is provided with a first cooling medium flow channel, and the rear bearing seat is provided with There is a second cooling medium flow channel, the first cooling medium flow channel is communicated with the second cooling medium flow channel; the front bearing seat assembly is provided with a third cooling medium flow channel.
结合第一方面，在第一方面的某些实现方式中，还包括连接管，所述连接管沿轴向设置并装配于所述后轴承座外套和后轴承座之间，所述连接管将所述第一冷却介质流道和第二冷却介质流道相连通，所述连接管与所述后轴承座外套和/或后轴承座活动配合以实现浮动连接。With reference to the first aspect, in some implementations of the first aspect, a connecting pipe is further included, the connecting pipe is axially arranged and assembled between the rear bearing housing outer shell and the rear bearing housing, the connecting pipe connects the The first cooling medium flow channel is communicated with the second cooling medium flow channel, and the connecting pipe is movably matched with the outer casing of the rear bearing seat and/or the rear bearing seat to realize floating connection.
结合第一方面和上述实现方式，在第一方面的某些实现方式中，所述后轴承座外套设有与所述第一冷却介质流道连通的第一轴向插 孔，所述后轴承座设有与所述第二冷却介质流道连通的第二轴向插孔，所述连接管的一端装配于所述第一轴向插孔，并与所述第一轴向插孔过盈配合，所述连接管的另一端装配于所述第二轴向插孔，并与所述第二轴向插孔间隙配合。In combination with the first aspect and the above-mentioned implementations, in some implementations of the first aspect, the rear bearing housing is provided with a first axial insertion hole communicating with the first cooling medium flow channel, and the rear bearing The seat is provided with a second axial insertion hole that communicates with the second cooling medium flow channel, and one end of the connecting pipe is assembled to the first axial insertion hole and interferes with the first axial insertion hole. Matching, the other end of the connecting pipe is assembled to the second axial insertion hole, and is in clearance fit with the second axial insertion hole.
结合第一方面和上述实现方式，在第一方面的某些实现方式中，所述后轴承座包括第一部件和第二部件，所述第一部件和第二部件均呈环状，所述第一部件沿径向位于所述后轴承座外套的内侧，所述第二部件沿轴向位于所述后轴承座外套的后方，所述连接管设置于所述第二部件与所述后轴承座外套之间，所述第二冷却介质流道设置于所述第一部件。In combination with the first aspect and the above implementations, in some implementations of the first aspect, the rear bearing housing includes a first part and a second part, the first part and the second part are both annular, and the The first part is located radially inside the rear bearing housing shell, the second part is axially located behind the rear bearing housing shell, and the connecting pipe is arranged between the second part and the rear bearing Between the seat jackets, the second cooling medium flow channel is arranged on the first component.
结合第一方面和上述实现方式，在第一方面的某些实现方式中，所述后轴承座外套和所述第一部件之间设有滚动套。In combination with the first aspect and the above implementations, in some implementations of the first aspect, a rolling sleeve is provided between the rear bearing housing outer shell and the first component.
结合第一方面和上述实现方式，在第一方面的某些实现方式中，所述第一部件的后端设有第二环槽，所述第二部件与所述第一部件配合并遮蔽所述第二环槽，所述第一部件的前端设有第三环槽，所述后轴承座还包括第三部件，所述第三部件与所述第一部件配合并遮蔽所述第三环槽，所述第二环槽和第三环槽通过轴向孔连通，所述第二环槽和第三环槽形成所述第二冷却介质流道。In combination with the first aspect and the above implementations, in some implementations of the first aspect, the rear end of the first component is provided with a second annular groove, and the second component cooperates with the first component and shields the The second ring groove, the front end of the first part is provided with a third ring groove, the rear bearing seat further includes a third part, the third part cooperates with the first part and shields the third ring The second annular groove and the third annular groove communicate with each other through an axial hole, and the second annular groove and the third annular groove form the second cooling medium flow channel.
结合第一方面和上述实现方式，在第一方面的某些实现方式中，所述后轴承座外套的外壁上开设第一环槽，所述机体组件与所述后轴承座外套配合，所述机体组件遮蔽所述第一环槽以形成所述第一冷却介质流道。In combination with the first aspect and the above-mentioned implementations, in some implementations of the first aspect, a first annular groove is defined on the outer wall of the rear bearing housing outer wall, the body component is matched with the rear bearing housing outer housing, and the The body assembly shields the first annular groove to form the first cooling medium flow channel.
结合第一方面和上述实现方式，在第一方面的某些实现方式中，所述机体组件设有第四冷却介质流道，所述第四冷却介质流道与所述第二冷却介质流道相连通，所述第三冷却介质流道与所述第一冷却介质流道相连通，冷却介质依次流过所述第三冷却介质流道、所述第一冷却介质流道、所述第二冷却介质流道和第四冷却介质流道。In combination with the first aspect and the above implementations, in some implementations of the first aspect, the body assembly is provided with a fourth cooling medium flow channel, the fourth cooling medium flow channel and the second cooling medium flow channel The third cooling medium flow channel is communicated with the first cooling medium flow channel, and the cooling medium sequentially flows through the third cooling medium flow channel, the first cooling medium flow channel, and the second cooling medium flow channel. A cooling medium flow channel and a fourth cooling medium flow channel.
结合第一方面和上述实现方式，在第一方面的某些实现方式中，还包括主轴箱，所述机体组件的外周面设有螺旋环槽，所述机体组件装配于所述主轴箱内，所述主轴箱遮蔽所述螺旋环槽以形成所述第四冷却介质流道，所述主轴箱设有与所述第三冷却介质流道相连通的进水孔，所述主轴箱设有与所述第四冷却介质流道相连通的出水孔。In combination with the first aspect and the above implementations, in some implementations of the first aspect, a headstock is further included, a spiral ring groove is provided on the outer peripheral surface of the body assembly, and the body assembly is assembled in the headstock, The spindle box shields the spiral ring groove to form the fourth cooling medium flow channel, the spindle box is provided with a water inlet hole that communicates with the third cooling medium flow channel, and the spindle box is provided with a water inlet hole communicating with the third cooling medium flow channel. The water outlet holes communicated with the fourth cooling medium flow channels.
第二方面，一种机床，包括第一方面中任一实现方式所述的电主轴。In a second aspect, a machine tool includes the electric spindle according to any one of the implementations of the first aspect.
上述技术方案中的一个技术方案至少具有如下优点或有益效果之一：One of the technical solutions in the above-mentioned technical solutions has at least one of the following advantages or beneficial effects:
前轴承通过第三冷却介质流道实现冷却，后轴承座与后轴承座外套均设有冷却介质流道，后轴承可以直接通过后轴承座冷却，可以到达和前轴承一样的冷却效果，从而延长后轴承的使用寿命。The front bearing is cooled by the third cooling medium flow channel, and the rear bearing seat and the outer casing of the rear bearing seat are provided with cooling medium flow channels. The rear bearing can be cooled directly through the rear bearing seat, which can achieve the same cooling effect as the front bearing. service life of the rear bearing.
由于后轴承座和后轴承座外套同时通过连通的冷却介质流道被冷却，而不会导致两者温差大，避免出现没有冷却的后轴承座受热膨胀，受冷却的后轴承座外套缩小，从而避免配合效果被破坏，保证轴承的预紧。Since the rear bearing housing and the rear bearing housing jacket are simultaneously cooled through the connected cooling medium flow channel, the temperature difference between the two will not be large, avoiding the thermal expansion of the uncooled rear bearing housing and the shrinking of the cooled rear bearing housing jacket, thereby To avoid damage to the matching effect, ensure the preload of the bearing.
由于后轴承座带有冷却介质流道，可以将轴承至于机体组件内孔 之内缩短了主轴的轴承跨距，使电主轴更能够满足车铣电主轴在机床上的长度限制要求。Because the rear bearing seat has a cooling medium flow channel, the bearing can be placed in the inner hole of the body assembly to shorten the bearing span of the spindle, so that the electric spindle can better meet the length limit requirements of the turning and milling electric spindle on the machine tool.
由于后轴承座带有冷却介质流道，故后轴承可以选在满足载荷之内的更小型号的轴承，既减少成本又降低了主轴的转动惯量，减少了主轴加减速时间。Since the rear bearing seat has a cooling medium flow channel, the rear bearing can be selected in a smaller type bearing that meets the load, which not only reduces the cost, but also reduces the rotational inertia of the main shaft, and reduces the acceleration and deceleration time of the main shaft.
本发明的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明的实践了解到。Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the invention.
附图说明Description of drawings
本发明的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:
图1是本发明一个实施例结构示意图；1 is a schematic structural diagram of an embodiment of the present invention;
图2是图1中A处局部放大图。FIG. 2 is a partial enlarged view of part A in FIG. 1 .
具体实施方式Detailed ways
本部分将详细描述本发明的具体实施例，本发明之较佳实施例在附图中示出，附图的作用在于用图形补充说明书文字部分的描述，使人能够直观地、形象地理解本发明的每个技术特征和整体技术方案，但其不能理解为对本发明保护范围的限制。This part will describe the specific embodiments of the present invention in detail, and the preferred embodiments of the present invention are shown in the accompanying drawings. Each technical feature and overall technical solution of the invention should not be construed as limiting the protection scope of the invention.
本发明中，如果有描述到方向(上、下、左、右、前及后)时，其仅是为了便于描述本发明的技术方案，而不是指示或暗示所指的技术特征必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。In the present invention, if there is a description of a direction (up, down, left, right, front and rear), it is only for the convenience of describing the technical solution of the present invention, rather than indicating or implying that the technical features referred to must have specific characteristics Orientation, construction and operation in a particular orientation, and therefore should not be construed as limiting the invention.
本发明中，“若干”的含义是一个或者多个，“多个”的含义是两 个以上，“大于”“小于”“超过”等理解为不包括本数；“以上”“以下”“以内”等理解为包括本数。在本发明的描述中，如果有描述到“第一”“第二”仅用于区分技术特征为目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量或者隐含指明所指示的技术特征的先后关系。In the present invention, "several" means one or more, "multiple" means two or more, "greater than", "less than", "exceeding", etc. are understood as not including this number; "above", "below" and "within" " etc. are understood to include the original number. In the description of the present invention, if it is described that "first" and "second" are only used for the purpose of distinguishing technical features, it should not be understood as indicating or implying relative importance or implying the number of indicated technical features or Implicitly indicates the order of the indicated technical features.
本发明中，除非另有明确的限定，“设置”“安装”“连接”等词语应做广义理解，例如，可以是直接相连，也可以通过中间媒介间接相连；可以是固定连接，也可以是可拆卸连接，还可以是一体成型；可以是机械连接，也可以是电连接或能够互相通讯；可以是两个元件内部的连通或两个元件的相互作用关系。所属技术领域技术人员可以结合技术方案的具体内容合理确定上述词语在本发明中的具体含义。In the present invention, unless otherwise clearly defined, words such as "set", "install" and "connect" should be understood in a broad sense, for example, it may be directly connected or indirectly connected through an intermediate medium; it may be a fixed connection or a The detachable connection can also be integrally formed; it can be a mechanical connection or an electrical connection or can communicate with each other; it can be the internal communication between the two elements or the interaction relationship between the two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solutions.
其中，图1给出了本发明实施例的参考方向，以下结合图1所示的方向，对本发明的实施例进行说明。Among them, FIG. 1 shows the reference direction of the embodiment of the present invention, and the following describes the embodiment of the present invention with reference to the direction shown in FIG. 1 .
参见图1，本发明的实施例提供了一种电主轴，包括机体组件1和轴芯组件2，机体组件1设有前轴承座组件5和后轴承座组件3，轴芯组件2前端通过前轴承6支承于前轴承座组件5，后端通过后轴承4支承于后轴承座组件3。轴芯组件2包括轴芯和转子，机体组件1包括机体和定子，前轴承6和后轴承4根据需要分别设置一个或多个，轴芯组件2能够在机体组件1中通过转子、定子驱动旋转，并在机体组件1的前端输出扭矩。Referring to FIG. 1, an embodiment of the present invention provides an electric spindle, including a body assembly 1 and a shaft core assembly 2, the body assembly 1 is provided with a front bearing seat assembly 5 and a rear bearing seat assembly 3, and the front end of the shaft core assembly 2 passes through the front The bearing 6 is supported on the front bearing seat assembly 5 , and the rear end is supported on the rear bearing seat assembly 3 through the rear bearing 4 . The shaft core assembly 2 includes a shaft core and a rotor, the body assembly 1 includes a body and a stator, one or more front bearings 6 and rear bearings 4 are respectively provided as required, and the shaft core assembly 2 can be driven in the body assembly 1 by the rotor and stator. , and output torque at the front end of the body assembly 1.
参见图1、图2，后轴承座组件3包括后轴承座外套31和后轴承座32，后轴承座外套31与机体组件1连接，后轴承4的外圈支承于 后轴承座32，后轴承4的内圈与轴芯组件2配合，后轴承座32与后轴承座外套31配合，后轴承座32能够相对于后轴承座外套31沿轴向浮动，形成浮动端轴承结构。其中，后轴承座外套31设有第一冷却介质流道33，第一冷却介质流道33能够通入冷却水等冷却介质，以实现对于后轴承座外套31的冷却。后轴承座32设有第二冷却介质流道34，第二冷却介质流道34能够通入冷却水等冷却介质，以实现对于后轴承座32的冷却。第一冷却介质流道33和第二冷却介质流道34相连通，冷却水等冷却介质流经第一冷却介质流道33和第二冷却介质流道34，这样保证冷却后轴承座外套的冷却介质也可以冷却到后轴承座32，第一冷却介质流道33和第二冷却介质流道34共同实现对于后轴承座组件3的冷却，更加充分地带走后轴承工作中产生的热量。前轴承座组件5设有第三冷却介质流道51，第三冷却介质流道51能够通入冷却水等冷却介质，以实现对于前轴承6的冷却。本发明解决了由于轴承冷却不充分、不均匀带来的诸多问题，延长前轴承、后轴承的使用寿命，避免影响轴承的预紧。1 and 2, the rear bearing seat assembly 3 includes a rear bearing seat outer shell 31 and a rear bearing seat 32, the rear bearing seat outer shell 31 is connected with the body assembly 1, the outer ring of the rear bearing 4 is supported on the rear bearing seat 32, and the rear bearing The inner ring of 4 is matched with the shaft core assembly 2, the rear bearing seat 32 is matched with the rear bearing seat outer shell 31, and the rear bearing seat 32 can float axially relative to the rear bearing seat outer shell 31 to form a floating end bearing structure. The rear bearing housing jacket 31 is provided with a first cooling medium flow channel 33 , and the first cooling medium flow channel 33 can pass through cooling medium such as cooling water, so as to realize cooling of the rear bearing housing jacket 31 . The rear bearing seat 32 is provided with a second cooling medium flow channel 34 , and the second cooling medium flow channel 34 can pass through a cooling medium such as cooling water, so as to realize cooling of the rear bearing seat 32 . The first cooling medium flow channel 33 is communicated with the second cooling medium flow channel 34, and cooling medium such as cooling water flows through the first cooling medium flow channel 33 and the second cooling medium flow channel 34, so as to ensure the cooling of the outer casing of the bearing housing after cooling The medium can also be cooled to the rear bearing seat 32 , and the first cooling medium flow channel 33 and the second cooling medium flow channel 34 can jointly cool the rear bearing seat assembly 3 and more fully take away the heat generated during the operation of the rear bearing. The front bearing seat assembly 5 is provided with a third cooling medium flow channel 51 , and the third cooling medium flow channel 51 can pass a cooling medium such as cooling water to achieve cooling of the front bearing 6 . The invention solves many problems caused by insufficient and uneven cooling of the bearing, prolongs the service life of the front bearing and the rear bearing, and avoids affecting the preload of the bearing.
由于后轴承座32能够相对于后轴承座外套31沿轴向浮动，为了实现第一冷却介质流道33和第二冷却介质流道34相连通，第一冷却介质流道33和第二冷却介质流道34可通过变形软管、浮动接头等方式实现连接。Since the rear bearing seat 32 can float in the axial direction relative to the rear bearing seat outer shell 31, in order to realize the communication between the first cooling medium flow channel 33 and the second cooling medium flow channel 34, the first cooling medium flow channel 33 and the second cooling medium flow channel 33 The flow channel 34 can be connected by a deformed hose, a floating joint or the like.
例如在图1、图2所示的实施例中，后轴承座组件3还包括连接管35，连接管35沿轴向设置并装配于后轴承座外套31和后轴承座32之间，连接管35将第一冷却介质流道33和第二冷却介质流道34 相连通，连接管35与后轴承座外套31和/或后轴承座32活动配合以实现浮动连接。换言之，连接管35可以与后轴承座外套31固定连接后，再与后轴承座32活动配合；连接管35也可以与后轴承座32固定连接后，再与后轴承座外套31活动配合；连接管35还可以两端分别与后轴承座32和后轴承座外套31活动配合。连接管35通过形成的浮动连接结构，保证第一冷却介质流道33和第二冷却介质流道34相连通不受轴承浮动的影响，得以实现冷却后轴承座外套的冷却介质也可以冷却到后轴承座32。For example, in the embodiment shown in FIG. 1 and FIG. 2 , the rear bearing seat assembly 3 further includes a connecting pipe 35 , which is axially arranged and assembled between the rear bearing seat outer shell 31 and the rear bearing seat 32 . 35 connects the first cooling medium flow channel 33 and the second cooling medium flow channel 34, and the connecting pipe 35 is movably matched with the rear bearing housing shell 31 and/or the rear bearing housing 32 to realize floating connection. In other words, the connecting tube 35 can be fixedly connected with the rear bearing housing 31, and then movably cooperate with the rear bearing housing 32; the connecting tube 35 can also be fixedly connected with the rear bearing housing 32, and then movably fit with the rear bearing housing housing 31; The two ends of the tube 35 can also be movably matched with the rear bearing seat 32 and the rear bearing seat outer shell 31 respectively. The floating connection structure formed by the connecting pipe 35 ensures that the first cooling medium flow channel 33 and the second cooling medium flow channel 34 communicate with each other without being affected by the floating of the bearing, so that the cooling medium of the outer bearing housing after cooling can also be cooled to the rear. Bearing housing 32 .
进一步的，在一些实施例中，参见图1、图2，后轴承座外套31设有与第一冷却介质流道33连通的第一轴向插孔，后轴承座32设有与第二冷却介质流道34连通的第二轴向插孔，连接管35的一端装配于第一轴向插孔，并与第一轴向插孔过盈配合，连接管35的另一端装配于第二轴向插孔，并与第二轴向插孔间隙配合，连接管35与后轴承座32之间为大间隙配合保证轴承的浮动不受影响，这样保证冷却后轴承座外套的水也可以冷却到后轴承座32。Further, in some embodiments, referring to FIGS. 1 and 2 , the rear bearing housing 31 is provided with a first axial insertion hole communicating with the first cooling medium flow channel 33 , and the rear bearing housing 32 is provided with a second cooling medium The second axial insertion hole communicated with the medium flow channel 34, one end of the connecting pipe 35 is assembled in the first axial insertion hole, and has an interference fit with the first axial insertion hole, and the other end of the connecting pipe 35 is assembled in the second axial insertion hole The connecting pipe 35 and the rear bearing seat 32 are fitted with a large gap to ensure that the floating of the bearing is not affected, so as to ensure that the cooling water of the rear bearing seat jacket can also be cooled to Rear bearing housing 32 .
其中，可以理解的是，连接管35根据进水和出水需要，确定具体设置的数量，例如两个或更多。Among them, it can be understood that the number of the connection pipes 35 is determined according to the needs of water inlet and outlet, for example, two or more.
为了避免冷却介质在连接管35处发生泄漏，连接管35与第一轴向插孔、第二轴向插孔之间均设有密封圈36。其中，连接管35与第二轴向插孔间的密封圈36既能保证密封性，又能保证连接管35能够相对于后轴承座32相对浮动不受影响。In order to prevent the cooling medium from leaking at the connecting pipe 35, a sealing ring 36 is provided between the connecting pipe 35 and the first axial insertion hole and the second axial insertion hole. The sealing ring 36 between the connecting pipe 35 and the second axial insertion hole can not only ensure the sealing performance, but also ensure that the connecting pipe 35 can float relative to the rear bearing seat 32 without being affected.
参见图1、图2，后轴承座32包括第一部件37和第二部件38， 第一部件37和第二部件38均呈环状。其中，第一部件37沿轴向延伸，形成圆筒状，第一部件37沿径向位于后轴承座外套31的内侧，后轴承4装配于第一部件37，第二冷却介质流道34设置于第一部件37，第二冷却介质流道34中的冷却介质直接对第一部件37进行冷却，大大提升对于后轴承4的冷却效果。第二部件38沿径向延伸，形成圆形法兰状，第二部件38沿轴向位于后轴承座外套31的后方，后轴承座32的第二部件38与后轴承座外套31沿轴向分布，连接管35设置于第二部件38与后轴承座外套31之间，后轴承座32通过开设在第二部件38内部的孔道实现第一冷却介质流道33与第二冷却介质流道34的连通，保证轴承冷却的不受轴承浮动的影响。Referring to FIG. 1 and FIG. 2 , the rear bearing seat 32 includes a first part 37 and a second part 38 , and both the first part 37 and the second part 38 are annular. The first part 37 extends in the axial direction to form a cylindrical shape, the first part 37 is located radially on the inner side of the rear bearing housing shell 31 , the rear bearing 4 is assembled to the first part 37 , and the second cooling medium flow channel 34 is provided For the first part 37 , the cooling medium in the second cooling medium flow channel 34 directly cools the first part 37 , which greatly improves the cooling effect on the rear bearing 4 . The second part 38 extends radially to form a circular flange shape. The second part 38 is located at the rear of the rear bearing housing shell 31 in the axial direction. The second part 38 of the rear bearing housing 32 and the rear bearing housing shell 31 are axially arranged. Distribution, the connecting pipe 35 is arranged between the second part 38 and the rear bearing housing shell 31, and the rear bearing housing 32 realizes the first cooling medium flow channel 33 and the second cooling medium flow channel 34 through the holes opened in the second part 38 The connection ensures that the cooling of the bearing is not affected by the floating of the bearing.
在一些实施例中，参见图1、图2，后轴承座外套31和第一部件37之间设有滚动套39，滚动套39保证了主轴可靠的浮动性能，但是由于滚动套39的导热系数差，导致轴承的冷却和预紧提出了更高的要求，本发明通过相连通的第一冷却介质流道33和第二冷却介质流道34绕过滚动套39实现对于轴承的充分冷却，大大提升了轴承冷却和预紧效果。In some embodiments, referring to FIGS. 1 and 2 , a rolling sleeve 39 is provided between the rear bearing housing shell 31 and the first part 37 . The rolling sleeve 39 ensures the reliable floating performance of the main shaft, but due to the thermal conductivity of the rolling sleeve 39 This leads to higher requirements for the cooling and preloading of the bearing. In the present invention, the first cooling medium flow channel 33 and the second cooling medium flow channel 34 that communicate with each other bypass the rolling sleeve 39 to achieve sufficient cooling for the bearing, which greatly reduces the Improved bearing cooling and preload.
在一些实施例中，参见图1、图2，后轴承座外套31和第二部件38之间设有预紧弹簧310，预紧弹簧310对后轴承座32施加轴向的预紧力，用于实现后轴承4的预紧。为了方便预紧弹簧310的安装，可以在后轴承座外套31或第二部件38上设置安装槽，用于容置预紧弹簧310。In some embodiments, referring to FIG. 1 and FIG. 2 , a preload spring 310 is provided between the rear bearing housing shell 31 and the second part 38 , and the preload spring 310 exerts an axial preload force on the rear bearing housing 32 . To achieve the preload of the rear bearing 4 . In order to facilitate the installation of the preload spring 310 , an installation groove may be provided on the rear bearing housing shell 31 or the second component 38 for accommodating the preload spring 310 .
为了保证冷却效果，第一冷却介质流道33环绕后轴承座外套31 一周或多周，第一冷却介质流道33可通过开孔或开槽的方式形成，第一冷却介质流道33可以设置呈迂回的S形或简单的环形，例如在图1、图2所示的一些实施例中，后轴承座外套31的外壁上开设第一环槽，后轴承座外套31嵌入机体组件1，机体组件1与后轴承座外套31配合，机体组件1遮蔽第一环槽以形成第一冷却介质流道33。机体组件1在对应位置开孔，已经冷却介质引入或引出第一冷却介质流道33。其中，通过第一环槽形成第一冷却介质流道33的结构形式大大降低了第一冷却介质流道33在后轴承座外套31的加工难度。In order to ensure the cooling effect, the first cooling medium flow channel 33 surrounds the rear bearing housing shell 31 for one or more circles. The first cooling medium flow channel 33 may be formed by opening or slotting, and the first cooling medium flow channel 33 may be provided with A meandering S shape or a simple annular shape, for example, in some embodiments shown in FIGS. 1 and 2 , a first annular groove is provided on the outer wall of the rear bearing housing shell 31, and the rear bearing housing shell 31 is embedded in the body assembly 1. The assembly 1 is matched with the rear bearing housing shell 31 , and the body assembly 1 shields the first annular groove to form the first cooling medium flow channel 33 . The body assembly 1 has holes at corresponding positions, and the cooling medium has been introduced into or led out of the first cooling medium flow channel 33 . Wherein, the structural form of forming the first cooling medium flow channel 33 through the first annular groove greatly reduces the difficulty of machining the first cooling medium flow channel 33 on the outer casing 31 of the rear bearing seat.
第二冷却介质流道34环绕后轴承座32一周或多周，第二冷却介质流道34可通过开孔或开槽的方式形成，第二冷却介质流道34可以设置呈迂回的S形或简单的环形，例如在图1、图2所示的一些实施例中，第一部件37的后端设有第二环槽311，第二部件38与第一部件37配合并遮蔽第二环槽311，第一部件37的前端设有第三环槽312，后轴承座32还包括第三部件313，第三部件313与第一部件37配合并遮蔽第三环槽312，此外，第三部件313也为后轴承的外圈提供轴向限位。第二环槽311和第三环槽312通过轴向孔314连通，第二环槽311和第三环槽312形成两条第二冷却介质流道34。第二部件38开设孔道，以导通第一冷却介质流道33和第二冷却介质流道34。其中，第一部件37、第二部件38和第三部件313在设置对应的孔或槽后，连接为一个整体，从而大大降低了后轴承座32上二冷却介质流道的制作难度，同时保证后轴承4的冷却效果。The second cooling medium flow channel 34 surrounds the rear bearing seat 32 for one or more circles. The second cooling medium flow channel 34 may be formed by opening or slotting, and the second cooling medium flow channel 34 may be arranged in a circuitous S shape or A simple ring shape, for example, in some embodiments shown in FIGS. 1 and 2 , the rear end of the first part 37 is provided with a second ring groove 311 , and the second part 38 cooperates with the first part 37 and shields the second ring groove 311, the front end of the first part 37 is provided with a third ring groove 312, the rear bearing seat 32 also includes a third part 313, the third part 313 cooperates with the first part 37 and covers the third ring groove 312, in addition, the third part The 313 also provides axial stops for the outer race of the rear bearing. The second annular groove 311 and the third annular groove 312 communicate with each other through the axial hole 314 , and the second annular groove 311 and the third annular groove 312 form two second cooling medium flow passages 34 . The second component 38 is provided with holes to conduct the first cooling medium flow channel 33 and the second cooling medium flow channel 34 . Among them, the first part 37 , the second part 38 and the third part 313 are connected as a whole after the corresponding holes or grooves are provided, thereby greatly reducing the difficulty of manufacturing the two cooling medium flow passages on the rear bearing seat 32 , and at the same time ensuring Cooling effect of rear bearing 4.
具体的，参见图1，冷却液从机体组件1输入，再流到后轴承座 外套，此时分两条冷却水道，一条为第一冷却介质流道33，第一冷却介质流道33环绕后轴承座外套31流到对侧，另一条经连接管35流入后轴承座32，经第二冷却介质流道34环绕冷却后轴承座32后流到对侧，然后经连接管35导出，与第一冷却介质流道33交汇后流出，两个通道分别冷却后轴承座外套和后轴承座32。Specifically, referring to FIG. 1 , the cooling liquid is input from the body assembly 1, and then flows to the outer casing of the rear bearing seat. At this time, there are two cooling water channels, one of which is the first cooling medium flow channel 33, and the first cooling medium flow channel 33 surrounds the rear bearing. The seat jacket 31 flows to the opposite side, the other one flows into the rear bearing seat 32 through the connecting pipe 35, and then flows to the opposite side through the second cooling medium flow channel 34 to surround the cooling rear bearing seat 32, and then is led out through the connecting pipe 35, and is connected with the first cooling medium flow channel 34. The cooling medium flow channels 33 meet and flow out, and the two channels cool the rear bearing housing jacket and the rear bearing housing 32 respectively.
在一些实施例中，参见图1，机体组件1设有第四冷却介质流道11，第四冷却介质流道11位于定子外侧，第四冷却介质流道11能够通入冷却水等冷却介质，以实现对于定子的冷却，及时散去大功率电机产生的热量。In some embodiments, referring to FIG. 1 , the body assembly 1 is provided with a fourth cooling medium flow channel 11, the fourth cooling medium flow channel 11 is located outside the stator, and the fourth cooling medium flow channel 11 can pass through cooling medium such as cooling water, In order to achieve cooling of the stator and dissipate the heat generated by the high-power motor in time.
根据需要，前轴承座组件5的冷却介质流道、后轴承座组件3的冷却介质流道和机体组件1的冷却介质流道可以设置为彼此独立或相连通。According to requirements, the cooling medium flow channel of the front bearing seat assembly 5 , the cooling medium flow channel of the rear bearing seat assembly 3 and the cooling medium flow channel of the body assembly 1 can be arranged independently or communicated with each other.
例如在图1所示的一些实施例中，第四冷却介质流道11与第二冷却介质流道34相连通，第三冷却介质流道51与第一冷却介质流道33相连通。工作时，冷却介质进入电主轴，依次流过第三冷却介质流道51、第一冷却介质流道33、第二冷却介质流道34和第四冷却介质流道11。可以有效地对主轴工作过程中产生热量的部件进行冷却，因加工中心电主轴最主要的发热部件是定子，冷却介质冷却完定子温度会升高很多，优先冷却轴承使轴承得到充分冷却，因此，本发明设计的冷却介质的冷却顺序是先冷却前轴承，再冷却后轴承，最后冷却定子。For example, in some embodiments shown in FIG. 1 , the fourth cooling medium flow channel 11 communicates with the second cooling medium flow channel 34 , and the third cooling medium flow channel 51 communicates with the first cooling medium flow channel 33 . During operation, the cooling medium enters the electric spindle and flows through the third cooling medium flow channel 51 , the first cooling medium flow channel 33 , the second cooling medium flow channel 34 and the fourth cooling medium flow channel 11 in sequence. It can effectively cool the components that generate heat during the working process of the spindle. Because the most important heating component of the electric spindle of the machining center is the stator, the temperature of the stator will increase a lot after the cooling medium is cooled, and the bearing will be cooled first so that the bearing can be fully cooled. Therefore, The cooling sequence of the cooling medium designed by the present invention is to first cool the front bearing, then cool the rear bearing, and finally cool the stator.
其中，第四冷却介质流道11可以设置为沿机体组件外壁呈迂回 的S形、螺旋形或简单的环形。在一些实施例中，参见图1，电主轴还包括主轴箱7，机体组件的外周面设有螺旋环槽，机体组件装配于主轴箱7内，主轴箱7与机体组件相匹配，主轴箱7遮蔽螺旋环槽以形成第四冷却介质流道11，主轴箱7设有与第三冷却介质流道51相连通的进水孔71，主轴箱7设有与第四冷却介质流道11相连通的出水孔72。Wherein, the fourth cooling medium flow channel 11 can be arranged in a detoured S shape, a spiral shape or a simple annular shape along the outer wall of the body assembly. In some embodiments, referring to FIG. 1 , the electro-spindle further includes a headstock 7, the outer peripheral surface of the body assembly is provided with a spiral ring groove, the body assembly is assembled in the headstock 7, the headstock 7 matches the body assembly, and the headstock 7 The spiral ring groove is shielded to form the fourth cooling medium flow channel 11 , the headstock 7 is provided with a water inlet hole 71 that communicates with the third cooling medium flow channel 51 , and the headstock 7 is provided with the fourth cooling medium flow channel 11 communicated with The water outlet hole 72.
冷却也只从主轴箱7的进水孔71进入机体组件的第一个环路①，第一个环路①环绕于机体组件的前端外壁，环绕机体组件一圈后进入径向孔②，经环第三冷却介质流道51绕前轴承座组件5一圈后由径向孔③流入机体组件的冷却水孔，再流到后轴承外套，此时分两条冷却水道，一条环绕后轴承座外套的第一冷却介质流道33流到对侧的第一冷却介质流道33的出口位置⑤，另一条经过连接管流入后轴承座，经第二冷却介质流道34环绕冷却从对侧位置④经连接管流到第一冷却介质流道33的出口位置⑤，两个通道分别冷却后轴承外套和后轴承座，从⑤经过机体组件的冷却水孔流至机体组件前端，并流出机体组件，在环绕机体组件到⑥，经过⑥环绕机体组件到达⑦，经过⑦环绕机体组件到达⑧，经过⑧环绕机体组件到达⑨，经过⑨环绕机体组件到达⑩，经过⑩环绕机体组件到达出水孔72。The cooling also only enters the first loop ① of the body assembly from the water inlet hole 71 of the headstock 7. The first loop ① surrounds the front end outer wall of the body assembly, and then enters the radial hole ② after going around the body assembly once. The third cooling medium flow channel 51 circles the front bearing seat assembly 5 once, and then flows into the cooling water hole of the body assembly through the radial hole ③, and then flows to the rear bearing housing. At this time, there are two cooling water channels, and one surrounds the rear bearing housing housing. The first cooling medium flow channel 33 flows to the outlet position ⑤ of the first cooling medium flow channel 33 on the opposite side, the other one flows into the rear bearing seat through the connecting pipe, and is cooled by the second cooling medium flow channel 34 from the opposite side It flows through the connecting pipe to the outlet position ⑤ of the first cooling medium flow channel 33, and the two channels cool the rear bearing shell and the rear bearing seat respectively, and flow from ⑤ through the cooling water hole of the body assembly to the front end of the body assembly, and out of the body assembly, Around the body assembly to ⑥, through ⑥ around the body assembly to ⑦, through ⑦ around the body assembly to ⑧, through ⑧ around the body assembly to ⑨, through ⑨ around the body assembly to ⑩, through ⑩ around the body assembly to reach the water outlet 72.
本发明的实施例还提供一种机床，包括以上任一实施例中的电主轴，用于车削、镗削、钻削、铣削等。Embodiments of the present invention also provide a machine tool, including the electric spindle in any of the above embodiments, for turning, boring, drilling, milling, and the like.
本发明具有以下优势：The present invention has the following advantages:
后轴承座32与后轴承座外套31均设有冷却介质流道，后轴承4 可以直接通过后轴承座32冷却，可以到达和前轴承一样的冷却效果，从而延长后轴承4的使用寿命。Both the rear bearing seat 32 and the rear bearing seat outer shell 31 are provided with cooling medium flow channels, and the rear bearing 4 can be cooled directly by the rear bearing seat 32 , which can achieve the same cooling effect as the front bearing, thereby prolonging the service life of the rear bearing 4 .
由于后轴承座32和后轴承座外套31同时通过连通的冷却介质流道被冷却，而不会导致两者温差大，避免出现没有冷却的后轴承座32受热膨胀，受冷却的后轴承座外套31缩小，从而避免配合效果被破坏，保证轴承的预紧。Since the rear bearing seat 32 and the rear bearing seat outer shell 31 are simultaneously cooled through the communicating cooling medium flow channel, the temperature difference between the two will not be large, and the uncooled rear bearing seat 32 is prevented from being thermally expanded, and the cooled rear bearing seat outer shell 31 is reduced, so as to avoid the damage of the matching effect and ensure the preload of the bearing.
由于后轴承座32带有冷却介质流道，可以将轴承至于机体组件1内孔之内缩短了主轴的轴承跨距，使电主轴更能够满足车铣电主轴在机床上的长度限制要求。Because the rear bearing seat 32 has a cooling medium flow channel, the bearing can be placed in the inner hole of the body assembly 1 to shorten the bearing span of the main shaft, so that the electric spindle can better meet the length limit requirements of the turning and milling electric spindle on the machine tool.
由于后轴承座32带有冷却介质流道，故后轴承4可以选在满足载荷之内的更小型号的轴承，既减少成本又降低了主轴的转动惯量，减少了主轴加减速时间。Since the rear bearing seat 32 has a cooling medium flow channel, the rear bearing 4 can be selected as a smaller type bearing that meets the load, which not only reduces the cost, but also reduces the rotational inertia of the main shaft, and reduces the acceleration and deceleration time of the main shaft.
实现了冷却液先冷却轴承后冷却电机，大大提升轴承的冷却效果。It is realized that the coolant first cools the bearing and then the motor, which greatly improves the cooling effect of the bearing.
在本说明书的描述中，参考术语“示例”、“实施例”或“一些实施例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。In the description of this specification, a description with reference to the terms "example", "embodiment" or "some embodiments" etc. means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one aspect of the present invention in one embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
当然，本发明创造并不局限于上述实施方式，熟悉本领域的技术人员在不违背本发明精神的前提下还可作出等同变形或替换，这些等 同的变形或替换均包含在本申请权利要求所限定的范围内。Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can also make equivalent modifications or replacements without departing from the spirit of the present invention, and these equivalent modifications or replacements are included in the claims of the present application. within a limited range.

Claims (10)

  1. 一种电主轴，其特征在于，包括：An electric spindle, characterized in that it includes:
    机体组件，设有前轴承座组件和后轴承座组件；The body assembly is provided with a front bearing seat assembly and a rear bearing seat assembly;
    轴芯组件，前端通过前轴承支承于所述前轴承座组件，后端通过后轴承支承于所述后轴承座组件；an axle core assembly, the front end is supported on the front bearing seat assembly through a front bearing, and the rear end is supported on the rear bearing seat assembly through a rear bearing;
    其中，所述后轴承座组件包括后轴承座外套和后轴承座，所述后轴承座外套与所述机体组件连接，所述后轴承的外圈支承于所述后轴承座，所述后轴承座与所述后轴承座外套配合，所述后轴承座能够相对于所述后轴承座外套沿轴向浮动，所述后轴承座外套设有第一冷却介质流道，所述后轴承座设有第二冷却介质流道，所述第一冷却介质流道和第二冷却介质流道相连通；所述前轴承座组件设有第三冷却介质流道。Wherein, the rear bearing seat assembly includes a rear bearing seat outer shell and a rear bearing seat, the rear bearing seat outer shell is connected with the body assembly, the outer ring of the rear bearing is supported on the rear bearing seat, and the rear bearing The seat is matched with the outer shell of the rear bearing seat, the rear bearing seat can float relative to the outer shell of the rear bearing seat in the axial direction, the outer shell of the rear bearing seat is provided with a first cooling medium flow channel, and the rear bearing seat is provided with There is a second cooling medium flow channel, the first cooling medium flow channel is communicated with the second cooling medium flow channel; the front bearing seat assembly is provided with a third cooling medium flow channel.
  2. 根据权利要求1所述的电主轴，其特征在于，还包括连接管，所述连接管沿轴向设置并装配于所述后轴承座外套和后轴承座之间，所述连接管将所述第一冷却介质流道和第二冷却介质流道相连通，所述连接管与所述后轴承座外套和/或后轴承座活动配合以实现浮动连接。The electric spindle according to claim 1, further comprising a connecting pipe, the connecting pipe is axially arranged and assembled between the outer casing of the rear bearing seat and the rear bearing seat, and the connecting pipe connects the The first cooling medium flow channel is communicated with the second cooling medium flow channel, and the connecting pipe is movably matched with the outer casing of the rear bearing seat and/or the rear bearing seat to realize floating connection.
  3. 根据权利要求2所述的电主轴，其特征在于，所述后轴承座外套设有与所述第一冷却介质流道连通的第一轴向插孔，所述后轴承座设有与所述第二冷却介质流道连通的第二轴向插孔，所述连接管的一端装配于所述第一轴向插孔，并与所述第一轴向插孔过盈配合，所述连接管的另一端装配于所述第二轴向插孔，并与所述第二轴向插 孔间隙配合。The electric spindle according to claim 2, wherein a first axial insertion hole communicating with the first cooling medium flow channel is provided on the outer casing of the rear bearing seat, and the rear bearing seat is provided with a first axial insertion hole communicating with the first cooling medium flow channel. The second axial insertion hole communicated with the second cooling medium flow channel, one end of the connecting pipe is assembled to the first axial insertion hole, and has an interference fit with the first axial insertion hole, and the connecting pipe The other end of the socket is assembled with the second axial insertion hole, and is clearance fit with the second axial insertion hole.
  4. 根据权利要求2或3所述的电主轴，其特征在于，所述后轴承座包括第一部件和第二部件，所述第一部件和第二部件均呈环状，所述第一部件沿径向位于所述后轴承座外套的内侧，所述第二部件沿轴向位于所述后轴承座外套的后方，所述连接管设置于所述第二部件与所述后轴承座外套之间，所述第二冷却介质流道设置于所述第一部件。The electric spindle according to claim 2 or 3, wherein the rear bearing seat comprises a first part and a second part, the first part and the second part are both annular, and the first part is along the The second component is located at the inner side of the rear bearing housing in the radial direction, the second component is located at the rear of the rear bearing housing in the axial direction, and the connecting pipe is arranged between the second component and the rear bearing housing housing. , the second cooling medium flow channel is arranged on the first component.
  5. 根据权利要求4所述的电主轴，其特征在于，所述后轴承座外套和所述第一部件之间设有滚动套。The electric spindle according to claim 4, wherein a rolling sleeve is provided between the outer casing of the rear bearing seat and the first part.
  6. 根据权利要求4所述的电主轴，其特征在于，所述第一部件的后端设有第二环槽，所述第二部件与所述第一部件配合并遮蔽所述第二环槽，所述第一部件的前端设有第三环槽，所述后轴承座还包括第三部件，所述第三部件与所述第一部件配合并遮蔽所述第三环槽，所述第二环槽和第三环槽通过轴向孔连通，所述第二环槽和第三环槽形成所述第二冷却介质流道。The electric spindle according to claim 4, wherein the rear end of the first part is provided with a second ring groove, the second part cooperates with the first part and shields the second ring groove, The front end of the first component is provided with a third annular groove, the rear bearing seat further includes a third component, the third component cooperates with the first component and shields the third annular groove, the second The annular groove and the third annular groove are communicated through an axial hole, and the second annular groove and the third annular groove form the second cooling medium flow passage.
  7. 根据权利要求1所述的电主轴，其特征在于，所述后轴承座外套的外壁上开设第一环槽，所述机体组件与所述后轴承座外套配合，所述机体组件遮蔽所述第一环槽以形成所述第一冷却介质流道。The electric spindle according to claim 1, wherein a first annular groove is defined on the outer wall of the rear bearing housing outer wall, the body component is matched with the rear bearing housing outer housing, and the body component shields the first ring groove. an annular groove to form the first cooling medium flow channel.
  8. 根据权利要求1所述的电主轴，其特征在于，所述机体组件设有第四冷却介质流道，所述第四冷却介质流道与所述第二冷却介质流道相连通，所述第三冷却介质流道与所述第一冷却介质流道相连通，冷却介质依次流过所述第三冷却介质流道、所述第一冷却介质流 道、所述第二冷却介质流道和第四冷却介质流道。The electric spindle according to claim 1, wherein the body assembly is provided with a fourth cooling medium flow channel, the fourth cooling medium flow channel is communicated with the second cooling medium flow channel, and the first cooling medium flow channel is The three cooling medium flow channels are communicated with the first cooling medium flow channel, and the cooling medium flows through the third cooling medium flow channel, the first cooling medium flow channel, the second cooling medium flow channel and the first cooling medium flow channel in sequence. Four cooling medium flow channels.
  9. 根据权利要求8所述的电主轴，其特征在于，还包括主轴箱，所述机体组件的外周面设有螺旋环槽，所述机体组件装配于所述主轴箱内，所述主轴箱遮蔽所述螺旋环槽以形成所述第四冷却介质流道，所述主轴箱设有与所述第三冷却介质流道相连通的进水孔，所述主轴箱设有与所述第四冷却介质流道相连通的出水孔。The electric spindle according to claim 8, further comprising a spindle box, a spiral ring groove is provided on the outer peripheral surface of the body assembly, the body assembly is assembled in the spindle box, and the spindle box shields the The spiral ring groove is formed to form the fourth cooling medium flow channel, the headstock is provided with a water inlet hole that communicates with the third cooling medium flow channel, and the headstock is provided with the fourth cooling medium Outlet holes connected to the flow channel.
  10. 一种机床，其特征在于，包括权利要求1～9中任一项所述的电主轴。A machine tool, characterized by comprising the electric spindle according to any one of claims 1 to 9.
PCT/CN2021/092213 2021-01-18 2021-05-07 Motor spindle and machine tool WO2022151617A1 (en)

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CN202110063601.7 2021-01-18

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0457650A (en) * 1990-06-27 1992-02-25 Okuma Mach Works Ltd High speed spindle head equipped with main spindle cooling fan
KR101503010B1 (en) * 2013-09-11 2015-03-16 주식회사 에스엠에스비 high speed/high frequency spindle
CN110560713A (en) * 2019-09-05 2019-12-13 深圳市爱贝科精密机械有限公司 Floating type electric main shaft
CN210475550U (en) * 2019-09-17 2020-05-08 深圳市爱贝科精密机械有限公司 Large-load high-rigidity permanent magnet synchronous electric spindle
CN111687681A (en) * 2020-07-10 2020-09-22 深圳市爱贝科精密机械有限公司 Cooling mechanism of electric spindle and electric spindle
CN112059214A (en) * 2020-10-03 2020-12-11 深圳市爱贝科精密机械有限公司 High-efficient oil-gas lubrication main shaft

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0457650A (en) * 1990-06-27 1992-02-25 Okuma Mach Works Ltd High speed spindle head equipped with main spindle cooling fan
KR101503010B1 (en) * 2013-09-11 2015-03-16 주식회사 에스엠에스비 high speed/high frequency spindle
CN110560713A (en) * 2019-09-05 2019-12-13 深圳市爱贝科精密机械有限公司 Floating type electric main shaft
CN210475550U (en) * 2019-09-17 2020-05-08 深圳市爱贝科精密机械有限公司 Large-load high-rigidity permanent magnet synchronous electric spindle
CN111687681A (en) * 2020-07-10 2020-09-22 深圳市爱贝科精密机械有限公司 Cooling mechanism of electric spindle and electric spindle
CN112059214A (en) * 2020-10-03 2020-12-11 深圳市爱贝科精密机械有限公司 High-efficient oil-gas lubrication main shaft

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