CN112059212A - Spindle front end structure and electric spindle - Google Patents
Spindle front end structure and electric spindle Download PDFInfo
- Publication number
- CN112059212A CN112059212A CN202010783439.1A CN202010783439A CN112059212A CN 112059212 A CN112059212 A CN 112059212A CN 202010783439 A CN202010783439 A CN 202010783439A CN 112059212 A CN112059212 A CN 112059212A
- Authority
- CN
- China
- Prior art keywords
- bearing
- main body
- spindle
- front bearing
- lubrication
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005461 lubrication Methods 0.000 claims abstract description 50
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 230000001050 lubricating effect Effects 0.000 claims abstract description 30
- 239000012530 fluid Substances 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims description 53
- 239000000110 cooling liquid Substances 0.000 claims description 24
- 125000006850 spacer group Chemical group 0.000 claims description 24
- 238000011084 recovery Methods 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims 2
- 238000007906 compression Methods 0.000 claims 2
- 238000003754 machining Methods 0.000 description 16
- 238000003825 pressing Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- B23Q11/121—Arrangements for cooling or lubricating parts of the machine with lubricating effect for reducing friction
- B23Q11/123—Arrangements for cooling or lubricating parts of the machine with lubricating effect for reducing friction for lubricating spindle bearings
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Turning (AREA)
Abstract
The invention provides a main shaft front end structure and an electric main shaft, wherein the main shaft front end structure is arranged at the end part of a motor main body of the electric main shaft, and comprises: the front end main body is connected with the motor main body; the at least one first front bearing and the at least one second front bearing are axially arranged in the front end main body at intervals and are used for supporting a shaft core part of the electric spindle; a first lubrication passage is provided on the front end body for conveying lubrication liquid to the at least one first front bearing; a second lubrication passage is provided on the front end body for conveying lubrication fluid to the at least one second front bearing. According to the front end structure of the spindle, independent oil-gas lubrication is provided for different front bearings through different lubrication passages, more accurate lubricating liquid is supplied to the front bearings at different positions according to the rotating speed of the spindle and the processing environment, and the different front bearings are guaranteed to be accurately lubricated, so that the working reliability of the electric spindle is guaranteed.
Description
Technical Field
The invention belongs to the technical field of electric spindles, and particularly relates to a spindle front end structure and an electric spindle.
Background
At present, most of high-speed vertical machining electric spindles mill planes, and deep-cavity machining electric spindles which are specially used for dies and the like and have high machining difficulty are few. The mould material has the characteristics of high strength, rigidity, and lead to the processing degree of difficulty big, and the extension position is usually inside the cavity, and current electricity main shaft structure adopts the front end structure that has great draw ratio, has increased the span of preceding support bearing again simultaneously, leads to the lubricated demand of preceding support bearing spare to appear the difference, and current lubrication neglects this kind of difference, can cause adverse effect to the life and the machining precision of main shaft.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is that the front support bearing part of the existing deep cavity processing electric spindle has poor lubricating effect, so that a front end structure of the spindle and the electric spindle are provided.
In order to solve the above problems, the present invention provides a spindle front end structure mounted on an end portion of a motor main body of an electric spindle, including:
the front end main body is connected with the motor main body;
the electric spindle comprises at least one first front bearing and at least one second front bearing, wherein the at least one first front bearing and the at least one second front bearing are axially arranged in a front end main body at intervals and are used for supporting a shaft core part of the electric spindle;
a first lubrication passage provided on the front end body for conveying a lubricating fluid to the at least one first front bearing;
a second lubrication passage provided on the front end body for conveying lubrication fluid to the at least one second front bearing.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Preferably, the front end body comprises a connecting part and an extending part which are axially arranged, the extending part is close to the operation end of the electric spindle, the length of the extending part is H, the outer diameter of the extending part is d, and H/d is 0.62-1.5.
Preferably, the connecting part is close to the motor main body, and the front end main body is connected with the motor main body through the connecting part; the first lubrication passage is provided with a first lubrication liquid inlet which is provided on the outer peripheral surface of the connecting portion, and/or the second lubrication passage is provided with a second lubrication liquid inlet which is provided on the outer peripheral surface of the connecting portion.
Preferably, a spacer assembly is arranged between the at least one first front bearing and the at least one second front bearing.
Preferably, the spacer bush assembly comprises an inner spacer bush, and two axial ends of the inner spacer bush are respectively abutted to inner rings of the first front bearing and the second front bearing; and/or the spacer bush component comprises an outer spacer bush, and the two axial ends of the outer spacer bush component are respectively abutted to the outer rings of the first front bearing and the second front bearing.
Preferably, the at least one first front bearing is one, and/or the at least one second front bearing is one.
Preferably, the front end main body is further provided with a lubricating liquid recovery oil path, the lubricating liquid recovery oil path is communicated with the at least one first front bearing and the at least one second front bearing, and the lubricating liquid recovery oil path outputs the lubricating liquid at the at least one first front bearing and the at least one second front bearing.
Preferably, the lubricating liquid recovery oil passage includes a lubricating liquid outlet provided on an outer peripheral surface of the connecting portion when the front-end body includes the connecting portion.
Preferably, the front end body is further provided with a cooling structure comprising a helical flow channel extending helically in the axial direction of the front end body.
Preferably, the cooling structure includes a cooling liquid inlet provided on an outer circumferential surface of the connecting portion when the front-end main body includes the connecting portion; and/or the cooling structure comprises a cooling liquid outlet which can be communicated with the motor cooling structure of the motor main body.
Preferably, the cooling structure further includes a direct flow channel extending along the axial direction of the front end main body, the direct flow channel is communicated with the spiral flow channel, the end portion of the front end main body close to the operation end of the electric spindle is a first end, the end portion far away from the operation end of the electric spindle is a second end, the cooling liquid can flow along the direct flow channel, and after flowing from the second end to the first end, the cooling liquid flows into the spiral flow channel from the direct flow channel and flows back to the second end along the spiral flow channel.
Preferably, the spiral flow passage is formed in the outer peripheral surface of the front end main body, and a sleeve member is further sleeved outside the front end main body and used for closing the spiral flow passage.
Preferably, the front end structure of the main shaft further comprises a front lock nut for adjusting the pretension of the at least one first front bearing and the at least one second front bearing, and/or the front end structure of the main shaft further comprises a front bearing pressing assembly for pressing the front bearing.
An electric spindle adopts the spindle front end structure.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Preferably, the motor further comprises a motor main body, a shaft core piece and a rear end main body, wherein the front end main body, the motor main body and the rear end main body are sequentially connected, and the shaft core piece is arranged on the axes of the motor main body, the front end main body and the rear end main body in a penetrating mode.
Preferably, at least one rear bearing is arranged in the rear end body, and the at least one first front bearing, the at least one second front bearing and the at least one rear bearing jointly support the shaft core member.
Preferably, the at least one first front bearing and the at least one second front bearing are ball bearings, the at least one first front bearing and the at least one second front bearing are arranged back to back, and the at least one rear bearing is a roller bearing.
Preferably, the motor main body is provided with a motor cooling structure, the motor cooling structure is communicated with the cooling liquid outlet, and the cooling liquid carries out circumferential circulation cooling on the motor main body; and/or the motor main body is provided with an air cooling structure, and the air cooling structure comprises an airflow inlet and an airflow outlet.
The spindle front end structure and the electric spindle provided by the invention at least have the following beneficial effects:
the front end structure of the spindle aims at the problem that the front end span of a deep hole machining electric spindle in the prior art is large, so that the lubrication requirements of front bearings are inconsistent, independent oil-gas lubrication is provided for different front bearings through different lubrication passages, more accurate lubrication liquid is supplied to the front bearings at different positions according to the rotating speed and the machining environment of the spindle, and the different front bearings are accurately lubricated, so that the working reliability of the electric spindle is ensured.
Drawings
Fig. 1 is a first structural schematic diagram of a spindle front end structure according to an embodiment of the present invention;
FIG. 2 is a second schematic structural diagram of a spindle front end structure according to an embodiment of the present invention;
FIG. 3 is a first schematic structural diagram of an electric spindle according to an embodiment of the present invention;
fig. 4 is a second schematic structural diagram of the electric spindle according to the embodiment of the present invention.
The reference numerals are represented as:
1. a front end body; 2. a motor main body; 3. a first front bearing; 4. a second front bearing; 5. a shaft core member; 6. a connecting portion; 7. an extension; 8. a working end; 9. a first lubricating fluid inlet; 10. a second lubricating fluid inlet; 11. an inner spacer sleeve; 12. an outer spacer sleeve; 13. a lubricating fluid recovery oil path; 14. a lubricating fluid outlet; 15. a spiral flow channel; 16. a coolant inlet; 17. a coolant outlet; 18. a straight flow channel; 19. a first end; 20. a second end; 21. a sleeve member; 22. a front lock nut; 23. a rear end body; 24. a rear bearing; 25. a first lubrication passage; 26. a second lubrication passage; 27. a motor cooling structure; 28. an airflow inlet; 29. and an airflow outlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 3, a spindle front end structure disclosed in this embodiment is mounted at an end of a motor main body 2 of an electric spindle, and includes: the front end main body 1 is connected with the motor main body 2; at least one first front bearing 3 and at least one second front bearing 4, wherein the at least one first front bearing 3 and the at least one second front bearing 4 are axially installed in the front end main body 1 at intervals and used for supporting a shaft core part 5 of the electric spindle; a first lubrication passage 25, the first lubrication passage 25 being provided on the front end body 1, the first lubrication passage being for conveying a lubricating fluid to the at least one first front bearing 3; and a second lubrication passage 26, the second lubrication passage 26 being provided on the front end body 1, the second lubrication passage being for conveying the lubricating fluid to the at least one second front bearing 4.
The existing deep hole machining electric spindle seeks a larger length-diameter ratio, so that the working environment of a front bearing with two ends providing axial load and radial support in a front end structure is different, and the difference is more and more obvious along with the increase of the length-diameter ratio. The main shaft front end structure of this embodiment, it is big to deep hole processing electricity main shaft front end span among the prior art, leads to the inconsistent problem of lubricated demand of front bearing, provides independent oil-gas lubrication to the front bearing of difference through different lubricated passageways, according to main shaft rotational speed and processing environment, gives the more accurate lubricated liquid supply of front bearing of different positions, guarantees that different front bearing all obtains accurate lubrication to guarantee the operational reliability of electricity main shaft.
Preferably, the front end body 1 comprises a connecting portion 6 and an extension portion 7 arranged axially, the extension portion 7 is close to the working end 8 of the electric spindle, the length of the extension portion 7 is H, the outer diameter is d, and H/d is 0.62-1.5.
In the main shaft structure, the length H of the extension part is mainly determined by the arrangement distance L between the front bearings, when the distance L is smaller than 40mm, the length of the front end of the main shaft is the shortest, and the main shaft is generally used for plane milling and is not used for deep cavity machining; when the interval L is larger than the value of 140mm, the front end of the main shaft is the longest condition, and if the interval L is higher than the value, the radial rigidity of the main shaft is lower than 100N/um, and the machining requirement can not be met.
The diameter D of the front end of the main shaft is determined by the inner diameter D of the front bearing, the limit rotating speed of the bearing is reduced along with the increase of the diameter of the bearing, and the rigidity of the bearing is increased along with the increase of the diameter of the bearing. Therefore, according to the design requirement of the maximum rotating speed of the main shaft, the maximum bearing diameter exists to enable the maximum rotating speed of the main shaft to be maximum, and meanwhile, according to the requirement of the main shaft on the machining rigidity, the minimum bearing diameter exists to enable the rigidity of the main shaft to be just higher than the machining rigidity. In this embodiment, when the length-diameter ratio of the front end main body satisfies the range of 0.67 to 1.8, the rigidity of the main shaft can be just higher than the processing rigidity, and at this time, the length-diameter ratio of the front end main body is the largest, and the front end main body can be used for processing a narrow deep cavity.
Preferably, the connecting part 6 is close to the motor main body 2, and the front end main body 1 is connected with the motor main body 2 through the connecting part 6; the first lubrication passage 25 is provided with a first lubrication liquid inlet 9, the first lubrication liquid inlet 9 being provided on the outer circumferential surface of the connection portion 6, and/or the second lubrication passage 26 is provided with a second lubrication liquid inlet 10, the second lubrication liquid inlet 10 being provided on the outer circumferential surface of the connection portion 6.
Preferably, the front end body 1 is further provided with a lubricating fluid recovery oil path 13, the lubricating fluid recovery oil path 13 is communicated with the at least one first front bearing 3 and the at least one second front bearing 4, and the lubricating fluid recovery oil path 13 outputs the lubricating fluid at the at least one first front bearing 3 and the at least one second front bearing 4.
Preferably, the lubricating liquid recovery oil passage 13 includes a lubricating liquid outlet 14, and when the front-end body 1 includes the connecting portion 6, the lubricating liquid outlet 14 is provided on the outer peripheral surface of the connecting portion 6.
In the spindle motor, the connecting portion 6 generally has the same outer diameter as the motor main body 2, and this portion does not protrude into the hole/cavity, and the inlet and outlet of the lubricating liquid are provided on the outer peripheral surface thereof, which facilitates the connection of the pipes and does not adversely affect the rigidity of the main working portion of the front end structure, i.e., the extension portion.
Preferably, a spacer assembly is arranged between the at least one first front bearing 3 and the at least one second front bearing 4. The spacer bush component comprises an inner spacer bush 11, and the two axial ends of the inner spacer bush 11 are respectively abutted to the inner rings of the first front bearing 3 and the second front bearing 4; and/or the spacer bush component comprises an outer spacer bush 12, and the two axial ends of the outer spacer bush 12 component are respectively abutted to the outer rings of the first front bearing 3 and the second front bearing 4.
The spacer assembly in this embodiment is used for axial fixation of the two sets of front bearings, providing the necessary axial support for the two sets of bearings.
Preferably, the number of the at least one first front bearing 3 is one, and/or the number of the at least one second front bearing 4 is one, and on the premise of meeting the machining rigidity, the front end structure adopts a double front bearing structure, so that the production cost of the product is reduced.
Preferably, when the deep cavity is machined, the influence of component heating on machining precision is fully considered, the front end main body 1 is further provided with a cooling structure, the front end cooling structure comprises a spiral flow channel 15 which extends spirally along the axial direction of the front end main body 1, the spiral flow channel 15 can provide circumferential cooling for the front end structure, the cooling effect is good, and the machining precision of the spindle structure is guaranteed.
Preferably, the cooling structure includes a cooling liquid inlet 16, and when the front-end body 1 includes the connection portion 6, the cooling liquid inlet 16 is provided on the outer circumferential surface of the connection portion 6; and/or the cooling structure comprises a cooling liquid outlet 17, the cooling liquid outlet 17 being communicable with the motor cooling structure of the motor main body 2.
The front bearing part adopts a circumferential cooling mode, so that the continuous accumulation of heat of the front bearing and a motor is avoided, and the thermal elongation of the front end of the main shaft is ensured to be within a limited range; the front bearing cooling liquid inlet position sets up on the outer disc of connecting portion 6, compares present common setting at main shaft rear end structure, has not only reduced the flow resistance loss, has still saved the process of axle sleeve axial flow channel processing.
Preferably, the cooling structure further includes a straight flow passage 18 extending along the axial direction of the front end body 1, the straight flow passage 18 is communicated with the spiral flow passage 15, the end of the front end body 1 close to the working end 8 of the electric spindle is a first end 19, the end far away from the working end 8 of the electric spindle is a second end 20, the cooling liquid can flow along the straight flow passage 18, and after flowing from the second end 20 to the first end 19, the cooling liquid flows from the straight flow passage 18 into the spiral flow passage 15 and flows back to the second end 20 along the spiral flow passage 15. The cooling structure design fully considers the phenomenon that the heat productivity of the front end of the main shaft is larger than that of the rear end, the cooling liquid is firstly conveyed to the front end to cool the part with larger heat productivity, and the cooling uniformity of the main shaft is favorably ensured along the spiral flow passage 15 to the rear end.
Preferably, in order to realize annular circumferential cooling, the spiral flow passage 15 is opened on the outer circumferential surface of the front end main body 1, and a sleeve member 21 is further sleeved outside the front end main body 1, wherein the sleeve member 21 is used for closing the spiral flow passage 15.
Preferably, the front end structure of the main shaft further comprises a front lock nut 22, and the front lock nut 22 is used for adjusting the pre-tightening of the at least one first front bearing 3 and the at least one second front bearing 4. Compared with the scheme of adjusting the bearing pre-tightening by the isomorphic rear end spring in the prior art, the front locking nut 22 of the embodiment is directly adjusted, and is convenient and reliable. The front end structure of the main shaft further comprises a front bearing pressing assembly, the front bearing pressing assembly is used for pressing the front bearing, the front bearing pressing assembly generally comprises a bearing outer ring pressing cover and a bearing inner ring pressing ring, and the pressing assembly is arranged on the inner side of the front locking nut 22 and transmits pretightening force to the front bearing.
The outside of the compressing assembly can be additionally provided with a blocking cover and a sealing cover.
The main shaft front end structure that this embodiment provided, the front bearing adopts independent lubricated oil circuit, can carry out independent accurate lubrication to the front bearing, and is lubricated effectual. The front end structure adopts a cooling mode of combining circumferential circulation cooling and reciprocating cooling, and the cooling effect and the cooling uniformity of the front end structure are ensured.
As shown in fig. 3-4, the present embodiment provides an electric spindle, which adopts the spindle front end structure described above.
Preferably, the motor further comprises a motor main body 2, a shaft core piece 5 and a rear end main body 23, wherein the front end main body 1, the motor main body 2 and the rear end main body 23 are connected in sequence, and the shaft core piece 5 is arranged on the axes of the motor main body 2, the front end main body 1 and the rear end main body 23 in a penetrating mode.
Preferably, at least one rear bearing 24 is provided in the rear end body 23, the at least one first front bearing 3, the at least one second front bearing 4, the at least one rear bearing 24 jointly supporting the axial core member 5. Wherein, at least one first front bearing 3 and at least one second front bearing 4 are ball bearings, at least one first front bearing 3 and at least one second front bearing 4 are arranged back to back, and at least one rear bearing 24 is a roller bearing. The axial support is mainly provided by the front bearing, the configuration can achieve the purposes of high speed, rigid height and high load, the radial support main shaft is provided by the rear-end cylindrical roller, the rear-end cylindrical roller bearing can expand along the axial direction when the heat productivity is large, the stable control of the internal clearance value is ensured, a cooling flow channel is not required, and the shaft sleeve machining process is saved.
In this embodiment, the rear bearing 24 is also provided with an independent lubrication flow channel, and the rear bearing 24 can be independently and precisely lubricated.
Preferably, the motor main body 2 is provided with a motor cooling structure 27, the motor cooling structure 27 is communicated with the cooling liquid outlet 17, the motor cooling structure 27 also adopts a spiral flow channel design, and the cooling liquid performs circumferential circulation cooling on the motor main body 2; the front bearing part and the motor part are both cooled in a circumferential direction, the bearing and the motor cooling runner are connected in series, air cooling interfaces are arranged at the radial positions of the two ends of the shaft sleeve and the motor, and the end parts of the winding can be cooled in an air cooling mode after compressed air is communicated, so that the temperature rise of the motor part is reduced. The structure characteristic avoids the continuous accumulation of heat of the front bearing and the motor, and ensures that the thermal elongation of the front end of the main shaft is within a limited range.
The motor main part is equipped with the forced air cooling structure, and the forced air cooling structure is including seting up at the air current import of motor main part one end, seting up at the air current export of the motor main part other end, and air current import is towards the motor winding tip, and clean and dry compressed air gets into from air current import 28, directly blows to the motor winding tip, and the air is taken away the heat of stator and rotor, blows out from the air current export 29 of the other end.
According to the electric spindle, the front bearing is the ball bearing which is arranged back to back, most of axial load and radial load are borne, the rear bearing cylindrical roller bearing plays a role in radial support, the rear bearing can expand axially, the stable control of an internal clearance value is guaranteed, a cooling flow channel is not needed, and the shaft sleeve machining process is saved. The motor part adopts the cooling mode of air cooling and liquid cooling, and the cooling effect is good.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (18)
1. A spindle nose structure to be mounted at an end of a motor main body (2) of an electric spindle, comprising:
the front end main body (1), the front end main body (1) is connected with the motor main body (2);
at least one first front bearing (3), at least one second front bearing (4), the at least one first front bearing (3), the at least one second front bearing (4) are axially installed in the front end main body (1) at intervals, and the shaft core piece (5) is used for supporting the electric spindle;
a first lubrication passage (25), the first lubrication passage (25) being provided on the front end body (1), the first lubrication passage (25) being used for conveying lubrication liquid to the at least one first front bearing (3);
a second lubrication passage (26), the second lubrication passage (26) being provided on the front end body (1), the second lubrication passage (26) being used for conveying lubrication liquid to the at least one second front bearing (4).
2. The spindle nose structure according to claim 1, characterized in that the nose body (1) comprises an axially arranged connection (6) and an extension (7), the extension (7) being close to the working end (8) of the electric spindle, the extension (7) having a length H and an outer diameter d, satisfying H/d-0.62-1.5.
3. The spindle nose structure according to claim 2, characterized in that the connecting portion (6) is close to the motor main body (2), and the nose main body (1) is connected to the motor main body (2) through the connecting portion (6); the first lubrication passage (25) is provided with a first lubrication liquid inlet (9), the first lubrication liquid inlet (9) being provided on the outer peripheral surface of the connection portion (6), and/or the second lubrication passage (26) is provided with a second lubrication liquid inlet (10), the second lubrication liquid inlet (10) being provided on the outer peripheral surface of the connection portion (6).
4. The spindle nose configuration according to claim 2, characterized in that a spacer assembly is provided between the at least one first front bearing (3) and the at least one second front bearing (4).
5. The spindle front end structure according to claim 4, characterized in that the spacer assembly comprises an inner spacer (11), wherein both axial ends of the inner spacer (11) abut against inner rings of the first front bearing (3) and the second front bearing (4), respectively; and/or the spacer assembly comprises an outer spacer (12), and the two axial ends of the outer spacer (12) assembly are respectively abutted to the outer rings of the first front bearing (3) and the second front bearing (4).
6. Spindle front end structure according to claim 2, characterized in that the at least one first front bearing (3) is one and/or the at least one second front bearing (4) is one.
7. The front end structure of a main shaft according to any one of claims 1 to 6, wherein the front end body (1) is further provided with a lubricating fluid recovery oil passage (13), the lubricating fluid recovery oil passage (13) communicates with the at least one first front bearing (3) and the at least one second front bearing (4), and the lubricating fluid recovery oil passage (13) outputs the lubricating fluid at the at least one first front bearing (3) and the at least one second front bearing (4).
8. The spindle front end structure according to claim 7, characterized in that the lubricating liquid recovery oil passage (13) includes a lubricating liquid outlet (14), and when the front end body (1) includes the connecting portion (6), the lubricating liquid outlet (14) is provided on an outer peripheral surface of the connecting portion (6).
9. Spindle front end structure according to any of claims 1-6, characterized in that the front end body (1) is further provided with a cooling structure comprising a helical flow channel (15) extending helically in the axial direction of the front end body (1).
10. The spindle front end structure according to claim 9, characterized in that the cooling structure includes a cooling liquid inlet (16), the cooling liquid inlet (16) being provided on an outer peripheral surface of the connecting portion (6) when the front end body (1) includes the connecting portion (6); and/or the cooling structure comprises a cooling liquid outlet (17), wherein the cooling liquid outlet (17) can be communicated with a motor cooling structure (27) of the motor main body (2).
11. The spindle front end structure according to claim 9, characterized in that the cooling structure further comprises a straight flow passage (18) extending axially along the front end body (1), the straight flow passage (18) communicates with the spiral flow passage (15), the front end body (1) has a first end (19) at a position close to the working end (8) of the electric spindle and a second end (20) at a position far from the working end (8) of the electric spindle, the cooling liquid can flow along the straight flow passage (18), and after flowing from the second end (20) to the first end (19), the cooling liquid flows from the straight flow passage (18) to the spiral flow passage (15) and flows back along the spiral flow passage (15) to the second end (20).
12. The front end structure of a spindle according to claim 9, wherein the spiral flow passage (15) is provided on an outer circumferential surface of the front end body (1), and a sleeve member (21) is further sleeved outside the front end body (1), and the sleeve member (21) is used for closing the spiral flow passage (15).
13. The front end structure of a spindle according to any one of claims 1 to 6, 8 and 10 to 12, characterized in that the front end structure of a spindle further comprises a front lock nut (22), wherein the front lock nut (22) is used for adjusting the pretension of the at least one first front bearing (3) and the at least one second front bearing (4), and/or the front end structure of a spindle further comprises a front bearing compression assembly, wherein the front bearing compression assembly is used for compressing the front bearings.
14. An electric spindle, characterized in that a spindle nose structure according to any one of claims 1-13 is used.
15. The electric spindle according to claim 14, further comprising a motor main body (2), a shaft core member (5) and a rear end main body (23), wherein the front end main body (1), the motor main body (2) and the rear end main body (23) are connected in sequence, and the shaft core member (5) is mounted on the axis of the motor main body (2), the front end main body (1) and the rear end main body (23) in a penetrating manner.
16. Electric spindle according to claim 15, characterized in that at least one rear bearing (24) is provided in the rear end body (23), the at least one first front bearing (3), the at least one second front bearing (4), the at least one rear bearing (24) jointly supporting the shaft core piece (5).
17. Electric spindle according to claim 16, characterized in that the at least one first front bearing (3), the at least one second front bearing (4) are ball bearings, the at least one first front bearing (3), the at least one second front bearing (4) are arranged back to back, and the at least one rear bearing (24) is a roller bearing.
18. Electric spindle according to claim 15, characterized in that the motor body (2) is provided with a motor cooling structure (27), the motor cooling structure (27) communicating with the cooling liquid outlet (17), the cooling liquid cooling the motor body (2) by circumferential circulation; and/or the motor main body (2) is provided with an air cooling structure, and the air cooling structure comprises an airflow inlet (28) and an airflow outlet (29).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010783439.1A CN112059212A (en) | 2020-08-06 | 2020-08-06 | Spindle front end structure and electric spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010783439.1A CN112059212A (en) | 2020-08-06 | 2020-08-06 | Spindle front end structure and electric spindle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112059212A true CN112059212A (en) | 2020-12-11 |
Family
ID=73656866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010783439.1A Pending CN112059212A (en) | 2020-08-06 | 2020-08-06 | Spindle front end structure and electric spindle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112059212A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833768A (en) * | 2021-09-26 | 2021-12-24 | 珠海格力电器股份有限公司 | Bearing lubricating structure and motor |
| CN114012500A (en) * | 2021-11-26 | 2022-02-08 | 珠海格力电器股份有限公司 | Lubricating, cooling and complete machine structure of high-speed electric main shaft |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103331696A (en) * | 2013-05-29 | 2013-10-02 | 无锡机床股份有限公司 | Electric spindle of grinding railway bearing |
| CN104174879A (en) * | 2014-08-08 | 2014-12-03 | 无锡机床股份有限公司 | High-power high-rigidity electric spindle |
| CN204262368U (en) * | 2014-08-04 | 2015-04-15 | 北京超同步伺服股份有限公司 | A kind of machining center electric main shaft structure |
| CN104889425A (en) * | 2015-06-11 | 2015-09-09 | 浙江日发精密机械股份有限公司 | High speed spindle box structure |
| CN105458306A (en) * | 2015-12-31 | 2016-04-06 | 西安交通大学 | High-speed electric main shaft device where ultra-precise angular contact ball and cylindrical roller bearings are used |
| CN106062395A (en) * | 2014-02-28 | 2016-10-26 | 日本精工株式会社 | Spindle device |
-
2020
- 2020-08-06 CN CN202010783439.1A patent/CN112059212A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103331696A (en) * | 2013-05-29 | 2013-10-02 | 无锡机床股份有限公司 | Electric spindle of grinding railway bearing |
| CN106062395A (en) * | 2014-02-28 | 2016-10-26 | 日本精工株式会社 | Spindle device |
| CN204262368U (en) * | 2014-08-04 | 2015-04-15 | 北京超同步伺服股份有限公司 | A kind of machining center electric main shaft structure |
| CN104174879A (en) * | 2014-08-08 | 2014-12-03 | 无锡机床股份有限公司 | High-power high-rigidity electric spindle |
| CN104889425A (en) * | 2015-06-11 | 2015-09-09 | 浙江日发精密机械股份有限公司 | High speed spindle box structure |
| CN105458306A (en) * | 2015-12-31 | 2016-04-06 | 西安交通大学 | High-speed electric main shaft device where ultra-precise angular contact ball and cylindrical roller bearings are used |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833768A (en) * | 2021-09-26 | 2021-12-24 | 珠海格力电器股份有限公司 | Bearing lubricating structure and motor |
| CN114012500A (en) * | 2021-11-26 | 2022-02-08 | 珠海格力电器股份有限公司 | Lubricating, cooling and complete machine structure of high-speed electric main shaft |
| CN114012500B (en) * | 2021-11-26 | 2022-12-16 | 珠海格力电器股份有限公司 | Lubricating, cooling and complete machine structure of high-speed electric main shaft |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104889425B (en) | High speed spindle box structure | |
| CN103286679B (en) | A kind of ultrahigh speed air bearing electric main-shaft | |
| CN105945308B (en) | A kind of air floated high speed electric mandrel | |
| CN112059212A (en) | Spindle front end structure and electric spindle | |
| CN200991759Y (en) | Air-float high-speed electric main axle | |
| CN106685129B (en) | A kind of high-speed, high precision electro spindle based on single loop thermal siphon cooling structure | |
| CN209255853U (en) | Shaft sleeve, electric spindle and machine tool | |
| CN205128941U (en) | High -speed main shaft of pottery - metal composite construction | |
| CN205465456U (en) | Lathe high -speed spindle cooling and lubrication device | |
| CN204672976U (en) | A kind of main spindle box | |
| CN201042766Y (en) | Rotor cage type cooling structure of machine tool principal axis liquid sliding surface bearing | |
| CN109590488B (en) | Bushings, electric spindles and machine tools | |
| CN118066113A (en) | Electronic oil pump and electric drive system | |
| CN210451009U (en) | Electric spindle capable of cooling rotor | |
| CN200991760Y (en) | Machine body of air-float high-speed electric main axle | |
| CN112846929A (en) | Cooling device for cooling shaft core of electric spindle | |
| CN107877370B (en) | Double-end main shaft | |
| CN215317433U (en) | Simple bearing cooling structure for ball cage type motorized spindle | |
| CN213599039U (en) | Transmission oil pump with lubricating shaft hole | |
| CN206253657U (en) | A kind of main axle structure for multi-wire saw | |
| CN210927259U (en) | High-speed main shaft servo motor | |
| CN213616050U (en) | Electric spindle assembly for high-speed grinding | |
| CN212239205U (en) | High-speed air engraving and milling spindle | |
| CN207522367U (en) | A kind of double end main shaft | |
| CN207709892U (en) | A kind of high-accuracy heavily loaded machining center main shaft |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201211 |