阅读说明：本技术 一种一体式电主轴 (Integrated electric spindle ) 是由 魏文龙 杜少华 陈江山 陈闯 黄伟迪 张立新 魏勇胜 陈誓立 于 2021-10-27 设计创作，主要内容包括：本发明涉及数控加工技术领域,具体涉及一种一体式电主轴,主轴穿设在主轴箱的内部,前调整隔圈、第一轴承、预警调整垫圈组、第二轴承和前垫圈依次套设在主轴的外部,前防水封盖与主轴箱固定连接,第一锁帽与主轴螺纹连接,后调整隔圈、第三轴承和后垫圈依次套设在主轴的外部,第二锁帽与主轴螺纹连接,后防水封盖与主轴箱固定连接,第三锁帽与主轴螺纹连接,第三锁帽位于后垫圈远离第三轴承的一端,本一体式电主轴结构紧凑,设计合理,以便于电主轴的安装。(The invention relates to the technical field of numerical control machining, in particular to an integrated electric spindle, wherein the spindle penetrates through the spindle box, a front adjusting spacer ring, a first bearing, an early warning adjusting washer group, a second bearing and a front washer are sequentially sleeved outside the spindle, a front waterproof sealing cover is fixedly connected with the spindle box, a first lock cap is in threaded connection with the spindle, a rear adjusting spacer ring, a third bearing and a rear washer are sequentially sleeved outside the spindle, a second lock cap is in threaded connection with the spindle, a rear waterproof sealing cover is fixedly connected with the spindle box, a third lock cap is in threaded connection with the spindle, and the third lock cap is positioned at one end, far away from the third bearing, of the rear washer.)

1. An integrated electric spindle, which is characterized in that,

the integrated electric spindle comprises a spindle box, a spindle, a front sealing structure and a rear sealing structure, and the spindle penetrates through the spindle box;

the front sealing structure comprises a front waterproof sealing cover, a front adjusting spacer ring, a first bearing, an early warning adjusting washer set, a second bearing, a front washer and a first lock cap, the front adjusting spacer ring, the first bearing, the early warning adjusting washer set, the second bearing and the front washer are sequentially sleeved outside the main shaft, the front waterproof sealing cover is fixedly connected with the main shaft box, the front waterproof sealing cover is positioned at one end, far away from the early warning adjusting washer set, of the first bearing, the first lock cap is in threaded connection with the main shaft, and the first lock cap is positioned at one end, far away from the second bearing, of the front washer;

the rear sealing structure comprises a second lock cap, a rear adjusting space ring, a third bearing, a rear waterproof sealing cover, a rear gasket and a third lock cap, the rear adjusting space ring, the third bearing and the rear gasket are sequentially sleeved outside the main shaft, the second lock cap is in threaded connection with the rear adjusting space ring away from one end of the third bearing, the rear waterproof sealing cover is fixedly connected with the main shaft box, the rear waterproof sealing cover is in threaded connection with the third bearing away from one end of the rear adjusting space ring, the third lock cap is in threaded connection with the main shaft, and the third lock cap is in threaded connection with the rear gasket away from one end of the third bearing.

2. The one-piece motorized spindle of claim 1,

the main spindle box is provided with an access hole.

3. The one-piece motorized spindle of claim 2,

the integrated electric spindle further comprises an access hole protection plate, the access hole protection plate is fixedly connected with the spindle box, and the access hole protection plate is located at the access hole.

4. The one-piece motorized spindle of claim 3,

the early warning adjusting washer set comprises an inner early warning adjusting washer and an outer early warning adjusting washer, the inner early warning adjusting washer is sleeved outside the spindle, and the outer side surface of the outer early warning adjusting washer is attached to the spindle box.

5. The one-piece motorized spindle of claim 4,

the rear closed structure further comprises a rear outer lock nut, the rear outer lock nut is in threaded connection with the spindle box, and the inner side surface of the rear outer lock nut is attached to the rear adjusting spacer ring.

6. The one-piece motorized spindle of claim 5,

the first bearing adopts an NN3020K bearing, the second bearing adopts a BTM100 bearing, and the third bearing adopts an NN3018K bearing.

7. The one-piece motorized spindle of claim 6,

the first bearing and the third bearing are both 1: 12.

Technical Field

The invention relates to the technical field of numerical control machining, in particular to an integrated electric spindle.

Background

The electric main shaft is a new technology which integrates a machine tool main shaft and a main shaft motor into a whole and appears in the field of numerical control machine tools, and the electric main shaft, a linear motor technology and a high-speed cutter technology push high-speed processing to a new era. The electric main shaft is a set of components and comprises the electric main shaft and accessories thereof, namely the electric main shaft, a high-frequency conversion device, an oil mist lubricator, a cooling device, a built-in encoder, a tool changing device and the like. The rotor of the motor is directly used as the main shaft of the machine tool, the shell of the main shaft unit is the motor base, and the motor and the main shaft of the machine tool are integrated by matching with other parts.

The existing electric spindle is complex in structure and inconvenient to install.

Disclosure of Invention

The invention aims to provide an integrated electric spindle which is reasonable in structure, simple in structure and convenient to install.

In order to achieve the purpose, the invention provides an integrated electric spindle, which comprises a spindle box, a spindle, a front sealing structure and a rear sealing structure, wherein the spindle penetrates through the spindle box;

the front sealing structure comprises a front waterproof sealing cover, a front adjusting spacer ring, a first bearing, an early warning adjusting washer set, a second bearing, a front washer and a first lock cap, the front adjusting spacer ring, the first bearing, the early warning adjusting washer set, the second bearing and the front washer are sequentially sleeved outside the main shaft, the front waterproof sealing cover is fixedly connected with the main shaft box, the front waterproof sealing cover is positioned at one end, far away from the early warning adjusting washer set, of the first bearing, the first lock cap is in threaded connection with the main shaft, and the first lock cap is positioned at one end, far away from the second bearing, of the front washer;

the rear sealing structure comprises a second lock cap, a rear adjusting space ring, a third bearing, a rear waterproof sealing cover, a rear gasket and a third lock cap, the rear adjusting space ring, the third bearing and the rear gasket are sequentially sleeved outside the main shaft, the second lock cap is in threaded connection with the rear adjusting space ring, one end of the third bearing is far away from the rear adjusting space ring, the rear waterproof sealing cover is fixedly connected with the main shaft box, the rear waterproof sealing cover is in threaded connection with the third bearing, the third lock cap is in threaded connection with the main shaft, the third lock cap is in threaded connection with the rear gasket, one end of the third bearing is far away from the rear gasket, and the rear waterproof sealing structure is simple so as to facilitate installation of the electric main shaft.

The spindle box is provided with an access hole so as to be convenient for maintaining components inside the spindle box.

Wherein, integral type electricity main shaft still includes the access hole guard plate, the access hole guard plate with headstock fixed connection, the access hole guard plate is located access hole department, in order to right the access hole seals.

The early warning adjusting washer set comprises an inner early warning adjusting washer and an outer early warning adjusting washer, the inner early warning adjusting washer is sleeved outside the main shaft, and the outer side surface of the outer early warning adjusting washer is attached to the main shaft box to adjust the position of the second bearing.

The rear closed structure further comprises a rear outer lock nut, the rear outer lock nut is in threaded connection with the spindle box, and the inner side surface of the rear outer lock nut is attached to the rear adjusting space ring so as to fix the rear adjusting space ring.

The first bearing adopts an NN3020K bearing, the second bearing adopts a BTM100 bearing, and the third bearing adopts an NN3018K bearing for adaptation.

Wherein, first bearing and third bearing all adopt 1:12 to improve the smoothness of the spindle system.

According to the integrated electric spindle, the front waterproof sealing cover and the first lock cap are matched with each other to fix the front adjusting space ring, the first bearing, the early warning adjusting washer group, the second bearing and the front washer, the second lock cap and the rear waterproof sealing cover are matched with each other to fix the rear adjusting space ring, the third bearing and the rear washer, the inner side surface of the rear washer is attached to the spindle to seal the rear waterproof sealing cover and the spindle, the third lock cap is in threaded connection with the spindle to fix the rear washer, the spindle box is designed according to different models, although the universality is lost, intermediate parts are effectively reduced, the spindle box is in interference contact with outer rings of the first bearing, the second bearing and the third bearing directly, and accumulation and transmission of processing errors and assembly errors are greatly reduced, meanwhile, clearance fit existing in the middle part is reduced, rigidity is effectively improved, and the integrated electric spindle is compact in structure and reasonable in design, so that the electric spindle is convenient to mount.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an integrated electric spindle provided by the present invention.

Fig. 2 is a sectional view of an integrated electric spindle provided by the present invention.

Fig. 3 is a partial enlarged view of a portion a of fig. 2 according to the present invention.

1-a spindle box, 11-an access hole, 2-a spindle, 21-a convex ring, 3-a front sealing structure, 31-a front waterproof sealing cover, 311-a groove, 312-a mounting cavity, 313-a hook groove, 32-a front adjusting spacer ring, 321-a hook part, 33-a first bearing, 34-an early warning adjusting gasket group, 341-an inner early warning adjusting gasket, 342-an outer early warning adjusting gasket, 35-a second bearing, 36-a front gasket, 37-a first locking cap, 38-a sealing sleeve, 4-a rear sealing structure, 41-a second locking cap, 42-a rear adjusting spacer ring, 43-a third bearing, 44-a rear waterproof sealing cover, 45-a rear gasket, 46-a third locking cap, 47-a rear outer locking nut and 5-an access hole protection plate.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 to 3, the present invention provides an integrated electric spindle, which includes a spindle box 1, a spindle 2, a front sealing structure 3 and a rear sealing structure 4, wherein the spindle 2 is inserted into the spindle box 1;

the front sealing structure 3 comprises a front waterproof sealing cover 31, a front adjusting spacer 32, a first bearing 33, an early warning adjusting washer group 34, a second bearing 35, a front washer 36 and a first locking cap 37, wherein the front adjusting spacer 32, the first bearing 33, the early warning adjusting washer group 34, the second bearing 35 and the front washer 36 are sequentially sleeved outside the main shaft 2, the front waterproof sealing cover 31 is fixedly connected with the main shaft box 1, the front waterproof sealing cover 31 is positioned at one end, far away from the early warning adjusting washer group 34, of the first bearing 33, the first locking cap 37 is in threaded connection with the main shaft 2, and the first locking cap 37 is positioned at one end, far away from the second bearing 35, of the front washer 36;

rear enclosing structure 4 includes second lock cap 41, back adjustment spacer 42, third bearing 43, waterproof closing cap 44 in back, back packing ring 45 and third lock cap 46, back adjustment spacer 42, third bearing 43 and back packing ring 45 overlap in proper order and establish the outside of main shaft 2, second lock cap 41 with 2 threaded connection of main shaft, second lock cap 41 is located back adjustment spacer 42 is kept away from the one end of third bearing 43, back waterproof closing cap 44 with headstock 1 fixed connection, back waterproof closing cap 44 is located third bearing 43 is kept away from the one end of back adjustment spacer 42, third lock cap 46 with 2 threaded connection of main shaft, third lock cap 46 is located back packing ring 45 is kept away from the one end of third bearing 43.

In this embodiment, the first lock cap 37, the second lock cap 41, and the third lock cap 46 are ultra-precise lock caps, the front adjusting spacer 32, the first bearing 33, the early warning adjusting washer set 34, the second bearing 35, and the front washer 36 of the front sealing structure 3 are sequentially sleeved outside the spindle 2, the front waterproof sealing cover 31 is fixed to the spindle box 1 through bolts, the first lock cap 37 is in threaded connection with the spindle 2, so that the front adjusting spacer 32, the first bearing 33, the early warning adjusting washer set 34, the second bearing 35, and the front washer 36 are fixed between the front waterproof sealing cover 31 and the first lock cap 37, the rear adjusting spacer 42, the third bearing 43, and the rear washer 45 of the rear sealing structure 4 are sequentially sleeved outside the spindle 2, the second lock cap 41 is in threaded connection with the spindle 2, the rear waterproof sealing cover 44 is fixed to the spindle box 1 through bolts, thereby fixing the rear adjusting spacer 42, the third bearing 43 and the rear gasket 45 between the second lock cap 41 and the rear waterproof cover 44, the inner side surface of the rear gasket 45 is attached to the spindle 2, thereby sealing the rear waterproof cover 44 and the spindle 2, the third lock cap 46 is in threaded connection with the spindle 2, thereby fixing the rear gasket 45, the spindle box 1 is designed according to different models, although the universality is lost, intermediate components are effectively reduced, the spindle box 1 is in interference contact with the outer rings of the first bearing 33, the second bearing 35 and the third bearing 43 directly, thereby greatly reducing the accumulation and transmission of processing errors and assembly errors, simultaneously reducing the clearance fit due to the intermediate components, effectively improving the rigidity, and the integrated electric spindle has compact structure and reasonable design, to facilitate the mounting of the electric spindle.

Further, the spindle box 1 is provided with an access opening 11.

In the present embodiment, the spindle head 1 has the access opening 11 to facilitate maintenance of components mounted inside the spindle head 1.

Further, integral type electricity main shaft still includes access hole guard plate 5, access hole guard plate 5 with 1 fixed connection of headstock, access hole guard plate 5 is located 11 departments of access hole.

In the embodiment, the access hole protection plate 5 is fixed to the spindle box 1 through a bolt, and when the electric spindle normally operates, the access hole protection plate 5 seals the access hole 11, so that components inside the spindle box 1 are protected.

Further, the early warning adjusting washer group 34 includes an inner early warning adjusting washer 341 and an outer early warning adjusting washer 342, the inner early warning adjusting washer 341 is sleeved on the outside of the spindle 2, and the outer side surface of the outer early warning adjusting washer 342 is attached to the spindle box 1.

In this embodiment, the inner surface of the inner warning adjustment washer 341 is attached to the spindle 2, the outer surface of the outer warning adjustment washer 342 is attached to the spindle head 1, and the inner warning adjustment washer 341 and the outer warning adjustment washer 342 are engaged with each other to adjust the positions of the first bearing 33 and the second bearing 35.

Further, the rear closed structure 4 further comprises a rear outer lock nut 47, the rear outer lock nut 47 is in threaded connection with the spindle box 1, and the inner side surface of the rear outer lock nut 47 is attached to the rear adjusting spacer 42.

In this embodiment, the inner side surface of the rear outer lock nut 47 is attached to the rear adjustment spacer 42, and the rear outer lock nut 47 fixes the rear adjustment washer.

Further, the first bearing 33 adopts an NN3020K bearing, the second bearing 35 adopts a BTM100 bearing, and the third bearing 43 adopts an NN3018K bearing;

the first bearing 33 and the third bearing 43 each adopt a 1: 12.

In this embodiment, the first bearing 33 is an NN3020K bearing, the third bearing 43 is an NN3018K bearing, and both the NN3020K and the NN3018K standard bearings have a taper of 1:12, in order to obtain the best fit between the main shaft 2 and the first and third bearings 33 and 43, when the main shaft 2 is fitted, a taper tail (small head) is firstly contacted, and by combining the requirement of internal interference during installation of the first and third bearings 33 and 43 and the variation generated by the main shaft 2 due to the shrinkage force of the first and third bearings 33 and 43, the fitting degree of the taper after the interference installation of the main shaft 2 and the first and third bearings 33 and 43 is more than 95%, so as to ensure the system stability and rigidity of the main shaft 2; the second bearing 35 is a BTM100 bearing, and the BMT100 bearing is the only source of the axial supporting force of the main shaft 2 system, and is also the main reason for limiting the rotation speed of the main shaft 2. Although a larger pressure angle can obtain a larger axial supporting force, the rotating speed is also greatly limited, so that the second bearing 35 adopts a bidirectional thrust bearing with a special angle belt, the rotating speed of 5500rpm at the maximum is ensured, and the elastic displacement generated by the axial load is also ensured.

Further, a convex ring 21 is arranged on the outer side of the main shaft 2, the front waterproof cover 31 is provided with a groove 311 matched with the convex ring 21, and the convex ring 21 is positioned inside the groove 311;

the front enclosing structure 3 further comprises a plurality of sealing sleeves 38, the front waterproof sealing cover 31 is provided with a plurality of mounting cavities 312 arranged at intervals, and one sealing sleeve 38 is arranged inside any one mounting cavity 312;

the front adjusting space ring 32 is provided with a hook portion 321, the front waterproof sealing cover 31 is provided with a hook groove 313 matched with the hook portion 321, and the hook portion 321 is located inside the hook groove 313.

In this embodiment, a protruding ring 21 is disposed on the outer side of the spindle 2, the protruding ring 21 and the grooves 311 are matched with each other to prevent liquid from overflowing into the spindle box 1, a plurality of grooves 311 are disposed at intervals on the front waterproof sealing cover 31, one sealing sleeve 38 is disposed inside any one of the grooves 311, the front waterproof sealing cover 31 and the spindle 2 adopt a multi-stage labyrinth groove design to fully ensure that liquid overflows when the spindle 2 is stationary, the front adjusting spacer ring 32 is provided with a hook portion 321, and the hook portion 321 is clamped inside the hook groove 313, so that the waterproof effect of the electric spindle is further improved.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.