CN112792364B - Rear bearing structure of electric spindle and electric spindle - Google Patents
Rear bearing structure of electric spindle and electric spindle Download PDFInfo
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- CN112792364B CN112792364B CN202110065159.1A CN202110065159A CN112792364B CN 112792364 B CN112792364 B CN 112792364B CN 202110065159 A CN202110065159 A CN 202110065159A CN 112792364 B CN112792364 B CN 112792364B
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- rear bearing
- bearing seat
- cooling medium
- medium flow
- outer sleeve
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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
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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
- 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
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- Mechanical Engineering (AREA)
- Turning (AREA)
Abstract
The invention discloses an electric main shaft rear bearing structure and an electric main shaft, comprising: the machine body assembly is provided with a rear bearing seat assembly; the rear end of the shaft core assembly is supported on the rear bearing seat assembly through 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 with the machine body assembly, an outer ring of the rear bearing is supported on the rear bearing seat, the rear bearing seat is matched with the rear bearing seat outer sleeve, the rear bearing seat can float along the axial direction relative to the rear bearing seat outer sleeve, a first cooling medium flow channel is arranged on the rear bearing seat outer sleeve, a second cooling medium flow channel is arranged on the rear bearing seat, and the first cooling medium flow channel is communicated with the second cooling medium flow channel. The rear bearing seat and the outer sleeve of the rear bearing seat are respectively provided with a cooling medium flow channel, the rear bearing can be directly cooled through the rear bearing seat, and the cooling effect same as that of the front bearing can be achieved, so that the service life of the rear bearing is prolonged.
Description
Technical Field
The invention is used for the field of turning and boring, and particularly relates to a rear bearing structure of an electric spindle and the electric spindle.
Background
The combined machining is realized by a plurality of different machining processes such as turning, boring, drilling, milling and the like on one machine tool, is a popular machining process in the field of machining at present, and belongs to the most extensive application of turning and milling combined machining. The workpiece can finish most or all processing procedures such as turning, boring, drilling, milling and the like in one-time clamping, so that the processing precision of parts and the processing efficiency of a machine tool are improved.
The compound electric main shaft of turnning and milling need provide big cutting force, therefore the design demand of motor is high-power big moment of torsion, high-power motor must produce very big heat, this part heat can transmit front and back bearing, make the bearing increase of generating heat, simultaneously because the bearing that this type main shaft used all belongs to the bearing calorific capacity that the height bore is far more than the bearing that ordinary bore, the motor generates heat and makes the temperature sharply increased at bearing position with bearing self generating heat, nevertheless because the bearing of rear end belongs to the floating end bearing, it is difficult to accomplish the cooling effect the same with the front bearing, the life of rear bearing is influenced greatly.
And because there is great difference in temperature in bolster bearing housing and bolster bearing housing overcoat, the rear bearing seat that does not cool is heated and expanded, and the rear bearing seat overcoat that receives the cooling shrinks to lead to the cooperation effect to be destroyed, influence the pretension of bearing.
In addition, the existing motorized spindle has a long bearing span and cannot meet the length limitation requirement of a turning and milling motorized spindle on a machine tool.
Disclosure of Invention
The present invention is directed to at least one of the technical problems of the prior art, and provides a rear bearing structure of an electric spindle and an electric spindle.
The technical scheme adopted by the invention for solving the technical problems is as follows:
in a first aspect, an electric spindle rear bearing structure includes:
the machine body assembly is provided with a rear bearing seat assembly;
the rear end of the shaft core assembly is supported on the rear bearing seat assembly through 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 with the machine body assembly, an outer ring of a rear bearing is supported on the rear bearing seat, the rear bearing seat is matched with the rear bearing seat outer sleeve, the rear bearing seat can float along the axial direction relative to the rear bearing seat outer sleeve, a first cooling medium flow channel is arranged on the rear bearing seat outer sleeve, a second cooling medium flow channel is arranged on the rear bearing seat, and the first cooling medium flow channel is communicated with the second cooling medium flow channel.
With reference to the first aspect, in certain implementation manners of the first aspect, the floating type cooling device further includes a connecting pipe, the connecting pipe is axially disposed and assembled between the rear bearing seat jacket and the rear bearing seat, the connecting pipe connects the first cooling medium flow channel and the second cooling medium flow channel, and the connecting pipe is movably matched with the rear bearing seat jacket and/or the rear bearing seat to achieve floating connection.
With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, a first axial insertion hole communicated with the first cooling medium flow passage is sleeved outside the rear bearing seat, a second axial insertion hole communicated with the second cooling medium flow passage is arranged on the rear bearing seat, one end of the connecting pipe is assembled in the first axial insertion hole and is in interference fit with the first axial insertion hole, and the other end of the connecting pipe is assembled in the second axial insertion hole and is in clearance fit with the second axial insertion hole.
With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, a seal ring is disposed between the connection pipe and each of the first axial insertion hole and the second axial insertion hole.
With reference to the first aspect and the foregoing implementation manners, in certain implementation manners of the first aspect, the rear bearing block includes a first member and a second member, the first member and the second member are both annular, the first member is located radially inside the rear bearing block outer casing, the second member is located axially behind the rear bearing block outer casing, the connecting pipe is disposed between the second member and the rear bearing block outer casing, and the second cooling medium flow passage is disposed in the first member.
With reference to the first aspect and the implementations described above, in certain implementations of the first aspect, a rolling sleeve is disposed between the rear bearing housing outer sleeve and the first member.
With reference to the first aspect and the foregoing implementations, in certain implementations of the first aspect, a pre-tightening spring is disposed between the rear bearing housing outer sleeve and the second member.
With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, a first annular groove is formed in an outer wall of the rear bearing seat outer sleeve, the engine body component is matched with the rear bearing seat outer sleeve, and the engine body component shields the first annular groove to form the first cooling medium flow passage.
With reference to the first aspect and the foregoing implementation manners, in certain implementation manners of the first aspect, a second ring groove is formed in the rear end of the first component, the second component is matched with the first component and shields the second ring groove, a third ring groove is formed in the front end of the first component, the rear bearing block further comprises a third component, the third component is matched with the first component and shields the third ring groove, the second ring groove and the third ring groove are communicated through an axial hole, and the second ring groove and the third ring groove form the second cooling medium flow passage.
In a second aspect, an electric spindle includes the electric spindle rear bearing structure described in any one of the implementations of the first aspect.
One of the above technical solutions has at least one of the following advantages or beneficial effects:
the rear bearing seat and the outer sleeve of the rear bearing seat are respectively provided with a cooling medium flow channel, the rear bearing can be directly cooled through the rear bearing seat, and the cooling effect same as that of the front bearing can be achieved, so that the service life of the rear bearing is prolonged.
Because back bearing frame and back bearing frame overcoat are cooled off through the coolant flow channel of intercommunication simultaneously, and can not lead to both differences in temperature big, avoid appearing not refrigerated back bearing frame thermal expansion, receive the refrigerated back bearing frame overcoat to shrink to avoid the cooperation effect to be destroyed, guarantee the pretension of bearing.
Because the rear bearing seat is provided with the cooling medium flow passage, the bearing can be arranged in the inner hole of the machine body assembly, so that the bearing span of the main shaft is shortened, and the length limit requirement of the turning and milling electric main shaft on a machine tool can be met.
Because the rear bearing seat is provided with the cooling medium flow passage, the rear bearing can be a smaller bearing meeting the load, the cost is reduced, the rotational inertia of the main shaft is reduced, and the acceleration and deceleration time of the main shaft is shortened.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of one embodiment of the present invention;
fig. 2 is a partially enlarged view of a portion a in fig. 1.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the present invention, if directions (up, down, left, right, front, and rear) are described, it is only for convenience of describing the technical solution of the present invention, and it is not intended or implied that the technical features referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, it is not to be construed as limiting the present invention.
In the invention, the meaning of "a plurality of" is one or more, the meaning of "a plurality of" is more than two, and the meaning of "more than", "less than", "more than" and the like is understood to not include the number; the terms "above", "below", "within" and the like are understood to include the instant numbers. In the description of the present invention, if there is description of "first" and "second" only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.
In the present invention, unless otherwise specifically limited, the terms "disposed," "mounted," "connected," and the like are to be understood in a broad sense, and for example, may be directly connected or indirectly connected through an intermediate; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be mechanically coupled, may be electrically coupled or may be capable of communicating with each other; either as communication within the two elements or as an interactive relationship of the two elements. The specific meaning of the above-mentioned words in the present invention can be reasonably determined by those skilled in the art in combination with the detailed contents of the technical solutions.
Wherein, fig. 1 shows a 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.
Referring to fig. 1, an embodiment of the present invention provides an electric spindle rear bearing structure, including a machine body assembly 1 and a shaft core assembly 2, where the machine body assembly 1 is provided with a rear bearing seat assembly 3, a rear end of the shaft core assembly 2 is supported on the rear bearing seat assembly 3 through a rear bearing 4, one or more rear bearings 4 are provided as required, and the shaft core assembly 2 can be driven to rotate in the machine body assembly 1 through a motor and output a torque at a front end of the machine body assembly 1.
Referring to fig. 1 and 2, the rear bearing seat assembly 3 includes a rear bearing seat outer sleeve 31 and a rear bearing seat 32, the rear bearing seat outer sleeve 31 is connected with the machine body assembly 1, an outer ring of the rear bearing 4 is supported on the rear bearing seat 32, an inner ring of the rear bearing 4 is matched with the shaft core assembly 2, the rear bearing seat 32 is matched with the rear bearing seat outer sleeve 31, and the rear bearing seat 32 can float axially relative to the rear bearing seat outer sleeve 31 to form a floating end bearing structure. The rear bearing housing outer sleeve 31 is provided with a first cooling medium flow passage 33, and cooling media such as cooling water can be introduced into the first cooling medium flow passage 33 to cool the rear bearing housing outer sleeve 31. The rear bearing housing 32 is provided with a second cooling medium flow passage 34, and a cooling medium such as cooling water can be introduced into the second cooling medium flow passage 34 to cool the rear bearing housing 32. The first cooling medium flow passage 33 is communicated with the second cooling medium flow passage 34, cooling media such as cooling water flow through the first cooling medium flow passage 33 and the second cooling medium flow passage 34, so that the cooling media for cooling the outer sleeve of the rear bearing seat can be cooled to the rear bearing seat 32, and the first cooling medium flow passage 33 and the second cooling medium flow passage 34 jointly realize cooling of the rear bearing seat assembly 3 and more fully take away heat generated in the bearing work. The problems caused by insufficient and uneven cooling of the bearing are solved, the service life of the rear bearing is prolonged, and the pre-tightening of the bearing is prevented from being influenced.
Since the rear bearing housing 32 is capable of floating in the axial direction with respect to the rear bearing housing cover 31, the first cooling medium flow passage 33 and the second cooling medium flow passage 34 may be connected by a flexible tube, a floating joint, or the like, in order to communicate the first cooling medium flow passage 33 and the second cooling medium flow passage 34.
For example, in the embodiment shown in fig. 1 and 2, the rear bearing housing assembly 3 further includes a connecting pipe 35, the connecting pipe 35 is axially disposed and assembled between the rear bearing housing jacket 31 and the rear bearing housing 32, the connecting pipe 35 communicates the first cooling medium flow passage 33 and the second cooling medium flow passage 34, and the connecting pipe 35 is movably fitted with the rear bearing housing jacket 31 and/or the rear bearing housing 32 to achieve a floating connection. In other words, the connecting pipe 35 can be movably matched with the rear bearing seat 32 after being fixedly connected with the rear bearing seat outer sleeve 31; the connecting pipe 35 can also be fixedly connected with the rear bearing seat 32 and then movably matched with the rear bearing seat outer sleeve 31; the connecting pipe 35 can also be movably matched with the rear bearing seat 32 and the rear bearing seat jacket 31 at two ends respectively. The connecting pipe 35 ensures that the first cooling medium flow passage 33 and the second cooling medium flow passage 34 are communicated without being influenced by the floating of the bearing through a formed floating connecting structure, so that the cooling medium for cooling the outer sleeve of the rear bearing seat can be cooled to the rear bearing seat 32.
Further, in some embodiments, referring to fig. 1 and 2, the rear bearing seat jacket 31 is provided with a first axial insertion hole communicated with the first cooling medium flow passage 33, the rear bearing seat 32 is provided with a second axial insertion hole communicated with the second cooling medium flow passage 34, one end of the connecting pipe 35 is assembled in the first axial insertion hole and is in interference fit with the first axial insertion hole, the other end of the connecting pipe 35 is assembled in the second axial insertion hole and is in clearance fit with the second axial insertion hole, and the large clearance fit between the connecting pipe 35 and the rear bearing seat 32 ensures that the floating of the bearing is not affected, thus ensuring that water cooling the rear bearing seat jacket can also be cooled to the rear bearing seat 32.
Here, it is understood that the number of the connection pipes 35 is determined to be specifically set, for example, two or more, according to the water inlet and outlet needs.
In order to avoid leakage of the cooling medium at the connection pipe 35, sealing rings 36 are provided between the connection pipe 35 and the first and second axial insertion holes. The sealing ring 36 between the connecting pipe 35 and the second axial insertion hole can ensure the sealing performance and ensure that the connecting pipe 35 can float relatively to the rear bearing seat 32 without being affected.
Referring to fig. 1 and 2, the rear bearing housing 32 includes a first member 37 and a second member 38, and the first member 37 and the second member 38 are each annular. The first member 37 extends in the axial direction to form a cylindrical shape, the first member 37 is located on the inner side of the rear bearing seat outer sleeve 31 in the radial direction, the rear bearing 4 is assembled on the first member 37, the second cooling medium flow passage 34 is arranged on the first member 37, and the cooling medium in the second cooling medium flow passage 34 directly cools the first member 37, so that the cooling effect on the rear bearing 4 is greatly improved. The second member 38 extends along the radial direction to form a circular flange shape, the second member 38 is located at the rear of the rear bearing seat outer sleeve 31 along the axial direction, the second member 38 of the rear bearing seat 32 and the rear bearing seat outer sleeve 31 are distributed along the axial direction, the connecting pipe 35 is arranged between the second member 38 and the rear bearing seat outer sleeve 31, the rear bearing seat 32 realizes the communication between the first cooling medium flow passage 33 and the second cooling medium flow passage 34 through a pore passage arranged in the second member 38, and the cooling of the bearing is not influenced by the floating of the bearing.
In some embodiments, referring to fig. 1 and 2, a rolling sleeve 39 is arranged between the rear bearing seat outer sleeve 31 and the first component 37, the rolling sleeve 39 ensures the reliable floating performance of the main shaft, but the cooling and pre-tightening of the bearing are higher in requirements due to the difference of the heat conductivity coefficient of the rolling sleeve 39, and the invention realizes the sufficient cooling of the bearing by bypassing the rolling sleeve 39 through the first cooling medium flow passage 33 and the second cooling medium flow passage 34 which are communicated, thereby greatly improving the cooling and pre-tightening effects of the bearing.
In some embodiments, referring to fig. 1 and 2, a pre-tightening spring 310 is disposed between the rear bearing housing outer sleeve 31 and the second member 38, and the pre-tightening spring 310 applies an axial pre-tightening force to the rear bearing housing 32 for pre-tightening the rear bearing 4. To facilitate the installation of the pre-tightening spring 310, an installation groove may be provided on the rear bearing housing shell 31 or the second member 38 for accommodating the pre-tightening spring 310.
In order to ensure the cooling effect, the first cooling medium flow passage 33 surrounds the rear bearing seat outer sleeve 31 for one or more circles, the first cooling medium flow passage 33 may be formed by a hole or a slot, and the first cooling medium flow passage 33 may be arranged in a winding S shape or a simple ring shape, for example, in some embodiments shown in fig. 1 and 2, a first ring groove is formed on the outer wall of the rear bearing seat outer sleeve 31, the rear bearing seat outer sleeve 31 is embedded into the engine block assembly 1, the engine block assembly 1 is matched with the rear bearing seat outer sleeve 31, and the engine block assembly 1 shields the first ring groove to form the first cooling medium flow passage 33. The block assembly 1 is perforated at the corresponding location, and the cooling medium has been led into or out of the first cooling medium flow passage 33. The structural form of forming the first cooling medium flow passage 33 by the first annular groove greatly reduces the processing difficulty of the first cooling medium flow passage 33 on the rear bearing seat outer sleeve 31.
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 drilling or slotting, the second cooling medium flow channel 34 may be provided with a winding S-shape or a simple ring shape, for example, in some embodiments shown in fig. 1 and 2, the rear end of the first member 37 is provided with a second annular groove 311, the second member 38 is engaged with the first member 37 and shields the second annular groove 311, the front end of the first member 37 is provided with a third annular groove 312, the rear bearing seat 32 further includes a third member 313, the third member 313 is engaged with the first member 37 and shields the third annular groove 312, and in addition, the third member 313 also provides an axial limit for the outer ring of the rear bearing. The second ring groove 311 and the third ring groove 312 are communicated through the axial hole 314, and the second ring groove 311 and the third ring groove 312 form two second cooling medium flow passages 34. The second member 38 is bored to communicate the first cooling medium flow passage 33 and the second cooling medium flow passage 34. The first part 37, the second part 38 and the third part 313 are connected into a whole after being provided with corresponding holes or grooves, so that the manufacturing difficulty of two cooling medium flow channels on the rear bearing seat 32 is greatly reduced, and the cooling effect of the rear bearing 4 is ensured.
Specifically, referring to fig. 1, the cooling liquid is input from the body assembly 1 and then flows to the rear bearing seat jacket, and at this time, the cooling liquid is divided into two cooling water passages, one cooling water passage is a first cooling medium passage 33, the first cooling medium passage 33 flows to the opposite side around the rear bearing seat jacket 31, the other cooling water passage flows into the rear bearing seat 32 through a connecting pipe 35, flows to the opposite side after cooling the rear bearing seat 32 through a second cooling medium passage 34, is then led out through the connecting pipe 35, and flows out after meeting with the first cooling medium passage 33, and the two passages respectively cool the rear bearing seat jacket and the rear bearing seat 32.
Embodiments of the present invention further provide an electric spindle, including the electric spindle rear bearing structure in any of the above embodiments.
The invention has the following advantages:
the rear bearing seat 32 and the rear bearing seat outer sleeve 31 are both provided with cooling medium channels, the rear bearing 4 can be directly cooled through the rear bearing seat 32, the cooling effect same as that of the front bearing can be achieved, and therefore the service life of the rear bearing 4 is prolonged.
Because the rear bearing seat 32 and the rear bearing seat outer sleeve 31 are simultaneously cooled through the communicated cooling medium flow channels, the temperature difference between the rear bearing seat 32 and the rear bearing seat outer sleeve 31 is not large, the phenomenon that the rear bearing seat 32 which is not cooled is heated to expand is avoided, the cooled rear bearing seat outer sleeve 31 is reduced, the matching effect is prevented from being damaged, and the pre-tightening of the bearing is ensured.
Because the rear bearing seat 32 is provided with the cooling medium flow passage, the bearing can be arranged in the inner hole of the machine body assembly 1, so that the bearing span of the main shaft is shortened, and the length limit requirement of the turning and milling electric main shaft on a machine tool can be met.
Because the rear bearing seat 32 is provided with a cooling medium flow passage, the rear bearing 4 can be a smaller bearing meeting the load, so that the cost is reduced, the rotational inertia of the main shaft is reduced, and the acceleration and deceleration time of the main shaft is shortened.
In the description herein, references to the description of the term "example," "an embodiment," or "some embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above 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.
The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope of the claims of the present application.
Claims (8)
1. An electric spindle rear bearing structure, comprising:
the machine body assembly is provided with a rear bearing seat assembly;
the rear end of the shaft core assembly is supported on the rear bearing seat assembly through 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 with the machine body assembly, an outer ring of the rear bearing is supported on the rear bearing seat, the rear bearing seat is matched with the rear bearing seat outer sleeve, the rear bearing seat can float relative to the rear bearing seat outer sleeve along the axial direction, a first cooling medium flow channel is arranged on the rear bearing seat outer sleeve, a second cooling medium flow channel is arranged on the rear bearing seat, and the first cooling medium flow channel is communicated with the second cooling medium flow channel;
the connecting pipe is axially arranged and assembled between the rear bearing seat jacket and the rear bearing seat, the first cooling medium flow channel and the second cooling medium flow channel are communicated through the connecting pipe, and the connecting pipe is movably matched with the rear bearing seat jacket and/or the rear bearing seat to realize floating connection; the rear bearing seat is sleeved with a first axial jack communicated with the first cooling medium flow channel, the rear bearing seat is provided with a second axial jack communicated with the second cooling medium flow channel, one end of the connecting pipe is assembled in the first axial jack and is in interference fit with the first axial jack, and the other end of the connecting pipe is assembled in the second axial jack and is in clearance fit with the second axial jack.
2. The rear electric spindle bearing structure according to claim 1, wherein a seal ring is disposed between the connecting pipe and each of the first and second axial insertion holes.
3. The electric spindle rear bearing structure according to claim 1 or 2, characterized in that the rear bearing housing comprises a first member and a second member, both of which are annular, the first member being located radially inside the rear bearing housing outer jacket, the second member being located axially behind the rear bearing housing outer jacket, the connecting pipe being provided between the second member and the rear bearing housing outer jacket, the second cooling medium flow passage being provided in the first member.
4. The electric spindle rear bearing arrangement according to claim 3, characterized in that a rolling sleeve is provided between the rear bearing housing outer sleeve and the first member.
5. The electric spindle rear bearing arrangement according to claim 3, characterized in that a pre-tensioned spring is provided between the rear bearing housing outer sleeve and the second part.
6. The rear bearing structure of the electric spindle according to claim 1, wherein a first annular groove is formed in an outer wall of the rear bearing seat outer sleeve, the machine body component is matched with the rear bearing seat outer sleeve, and the machine body component shields the first annular groove to form the first cooling medium flow passage.
7. The electric spindle rear bearing structure according to claim 3, wherein a second ring groove is provided at a rear end of the first member, the second member is fitted with the first member and shields the second ring groove, a third ring groove is provided at a front end of the first member, the rear bearing housing further includes a third member, the third member is fitted with the first member and shields the third ring groove, the second ring groove and the third ring groove communicate with each other through an axial hole, and the second ring groove and the third ring groove form the second cooling medium flow passage.
8. An electric spindle comprising an electric spindle rear bearing structure according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110065159.1A CN112792364B (en) | 2021-01-18 | 2021-01-18 | Rear bearing structure of electric spindle and electric spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110065159.1A CN112792364B (en) | 2021-01-18 | 2021-01-18 | Rear bearing structure of electric spindle and electric spindle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112792364A CN112792364A (en) | 2021-05-14 |
| CN112792364B true CN112792364B (en) | 2022-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110065159.1A Active CN112792364B (en) | 2021-01-18 | 2021-01-18 | Rear bearing structure of electric spindle and electric spindle |
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| Country | Link |
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| CN (1) | CN112792364B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102078974A (en) * | 2010-12-29 | 2011-06-01 | 广州市昊志机电有限公司 | Air floatation high-speed electric main shaft |
| CN104227032A (en) * | 2014-09-25 | 2014-12-24 | 广州市昊志机电股份有限公司 | Air-floated high-speed motorized spindle |
| CN205309312U (en) * | 2016-01-04 | 2016-06-15 | 东莞市科隆电机有限公司 | High -speed height of air supporting mills electric main shaft of two unifications of highlight |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH711186A1 (en) * | 2015-06-15 | 2016-12-15 | Reishauer Ag | A spindle unit for a machine tool for the fine machining of workpieces with groove-shaped profiles. |
-
2021
- 2021-01-18 CN CN202110065159.1A patent/CN112792364B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102078974A (en) * | 2010-12-29 | 2011-06-01 | 广州市昊志机电有限公司 | Air floatation high-speed electric main shaft |
| CN104227032A (en) * | 2014-09-25 | 2014-12-24 | 广州市昊志机电股份有限公司 | Air-floated high-speed motorized spindle |
| CN205309312U (en) * | 2016-01-04 | 2016-06-15 | 东莞市科隆电机有限公司 | High -speed height of air supporting mills electric main shaft of two unifications of highlight |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN112792364A (en) | 2021-05-14 |
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