CN210231548U - A mandrel structure of a high-speed air-floating electric spindle - Google Patents
A mandrel structure of a high-speed air-floating electric spindle Download PDFInfo
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- CN210231548U CN210231548U CN201921360946.3U CN201921360946U CN210231548U CN 210231548 U CN210231548 U CN 210231548U CN 201921360946 U CN201921360946 U CN 201921360946U CN 210231548 U CN210231548 U CN 210231548U
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Abstract
本实用新型公开了一种高速气浮电主轴的芯轴结构，包括芯轴，芯轴上从左向右依次设有用于安装左径向轴承的左径向轴颈、用于安装电机组件的电机安装轴颈、用于安装径向止推轴承的径向止推轴颈、用于安装右止推轴承的右止推轴颈，电机安装轴颈为左小右大的锥面结构，芯轴上在位于径向止推轴颈和右止推轴颈之间设置有止推盘，芯轴左端面设有偶数个左平衡螺纹孔，芯轴右端面设有偶数个右平衡螺纹孔，芯轴的电机安装轴颈上设有环形槽，其中一个左平衡螺纹孔底部设有工艺孔，工艺孔通过一个工艺通道与环形槽底部连通；电机组件的转子与电机安装轴颈之间通过锥面过盈配合实现紧固连接。本实用新型的优点：结构简单、回转精度高、安装操作方便。
The utility model discloses a mandrel structure of a high-speed air-floating electric spindle, which comprises a mandrel. The mandrel is provided with a left radial journal for installing a left radial bearing, a left radial journal for installing a motor assembly, and a The motor mounting journal, the radial thrust journal for installing the radial thrust bearing, the right thrust journal for installing the right thrust bearing, the motor mounting journal is a conical surface structure with a small left and a large right, and the core The shaft is provided with a thrust plate between the radial thrust journal and the right thrust journal, the left end face of the mandrel is provided with an even number of left balance threaded holes, and the right end face of the mandrel is provided with an even number of right balance threaded holes. There is an annular groove on the motor mounting journal of the mandrel, and a process hole is arranged at the bottom of one of the left balance threaded holes, and the process hole is communicated with the bottom of the annular groove through a process channel; the rotor of the motor assembly and the motor installation journal are connected by a cone. Face interference fit for tight connection. The utility model has the advantages of simple structure, high rotation precision and convenient installation and operation.
Description
Technical Field
The utility model belongs to the technical field of electricity main shaft revolution mechanic, what especially relate to is a mandrel structure of high-speed air supporting electricity main shaft.
Background
The high-speed air-floatation motorized spindle is a core functional part of high-grade numerical control machining equipment, and the mandrel is a key rotary component of the high-speed air-floatation motorized spindle and is mainly used for directly driving a cutter to perform rotary motion. At present, most of mandrel structures of high-speed air-floatation electric spindles comprise a plurality of complex components such as disc springs, shaft heaters, fastening screws and the like, and after a cutter is clamped for many times, each component is easy to wear, so that cutter installation errors occur, and machining precision is affected; and the motor rotor is directly and fixedly connected with the mandrel through a copper plating process, and the copper plating process is complex and has higher cost.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a simple structure, gyration precision height, installation convenient operation's high-speed air supporting electricity mandrel structure of main shaft.
The utility model discloses a realize through following technical scheme:
a mandrel structure of a high-speed air-floatation electric spindle comprises a mandrel, wherein a left radial journal for mounting a left radial bearing, a motor mounting journal for mounting a motor assembly, a radial thrust journal for mounting a radial thrust bearing and a right thrust journal for mounting a right thrust bearing are sequentially arranged on the mandrel from left to right, the motor mounting journal is of a conical surface structure with a small left and a large right, the rest journals are of a straight cylindrical surface structure, the outer diameter of the radial thrust journal is larger than that of the left radial journal, a thrust disc protruding outwards in the radial direction is arranged on the mandrel between the radial thrust journal and the right thrust journal, the left end surface of the mandrel is provided with an even number of left balance threaded holes uniformly distributed in the circumferential direction, the right end surface of the mandrel is provided with an even number of right balance threaded holes uniformly distributed in the circumferential direction, and the motor mounting journal of the mandrel is provided with, the bottom of one of the left balance threaded holes is provided with a process hole, and the process hole is communicated with the bottom of the annular groove through a process channel; the rotor of the motor assembly is fixedly connected with the motor mounting shaft neck of the mandrel through conical surface interference fit;
the right end of the mandrel is further provided with an output connecting part, the output connecting part is located on the right side of the right thrust journal, and power output is achieved through an external execution part of the output connecting part of the mandrel.
Furthermore, the output connecting part at the right end of the mandrel is of a cylindrical structure with a taper hole formed therein and external threads arranged outside, a collet chuck is inserted into the taper hole of the output connecting part, and the collet chuck is screwed into the outer side of the output connecting part through a nut, so that the collet chuck is locked.
Further, the mandrel forms a first positioning shoulder used for positioning the right end of the left radial bearing between the left radial journal and the motor mounting journal, and the mandrel forms a second positioning shoulder used for positioning the right end of the motor assembly between the motor mounting journal and the radial thrust journal.
Furthermore, an even number of magnetic induction grooves are uniformly distributed on the left end face of the mandrel along the circumferential direction, and the even number of magnetic induction grooves and the even number of left balance threaded holes are distributed in a staggered mode along the circumferential direction.
Further, the process channel is L-shaped.
Further, the cross section of the annular groove is arc-shaped, rectangular or V-shaped.
Compared with the prior art, the utility model has the following advantages:
the utility model provides a pair of dabber structure of high-speed air supporting electricity main shaft has advantages such as simple structure, required part are few, cutter installation accuracy is high, gyration accuracy is high, dynamic balance easy operation, electric motor rotor installation are simple and easy as the rotating member of electricity main shaft. In addition, the spring chuck is fastened through the nut, so that a complex clamping and tool changing mechanism is omitted, and the structure of the mandrel is greatly simplified; the balance threaded holes are formed in the left end and the right end of the mandrel, the balance screws are screwed into the threaded holes, in-place dynamic balance of the mandrel can be achieved, and balance precision is high.
Drawings
Fig. 1 is a perspective view of the mandrel of the present invention.
Fig. 2 is a left side view of the mandrel of the present invention.
Fig. 3 is a cross-sectional view of C-C of fig. 2.
Fig. 4 is an enlarged view at I of fig. 3.
Fig. 5 is a cross-sectional view of the mandrel of the present invention after assembly with other components.
Reference numbers in the figures: 1 mandrel, 11 output connecting parts, 12 thrust discs, 13 left radial journals, 14 motor mounting journals, 15 radial thrust journals, 16 right thrust journals, 17 first positioning shaft shoulders, 18 second positioning shaft shoulders, 19 left balance threaded holes, 110 right balance threaded holes, 111 annular grooves, 112 process holes, 113 process channels, 114 magnetic-sensitive induction grooves, 115 conical holes, 116 spring chucks, 117 screw caps, 2 left radial bearings, 3 motor components, 4 radial thrust bearings, 5 right thrust bearings, 6 shells, 7 backseat and 8 rotating speed sensors.
Detailed Description
The embodiments of the present invention will be described in detail below, and the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Referring to fig. 1 to 5, the embodiment discloses a mandrel structure of a high-speed air-flotation electric spindle, which includes a mandrel 1, a left radial journal 13 for mounting a left radial bearing 2, a motor mounting journal 14 for mounting a motor assembly 3, a radial thrust journal 15 for mounting a radial thrust bearing 4, and a right thrust journal 16 for mounting a right thrust bearing 5 are sequentially arranged on the mandrel 1 from left to right, the motor mounting journal 14 is a conical structure with a small left and a large right, the rest journals are flat cylindrical structures, the outer diameter of the radial thrust journal 15 is greater than that of the left radial journal 13, a thrust disk 12 protruding outward in the radial direction is arranged on the mandrel 1 between the radial thrust journal 15 and the right thrust journal 16, an even number of left balance threaded holes 19 uniformly distributed in the circumferential direction are arranged on the left end surface of the mandrel 1, an even number of right balance threaded holes 110 uniformly distributed in the circumferential direction are arranged on the right end surface of the, the mandrel 1 is dynamically balanced in place by screwing balance screws into the left balance threaded hole 19 and the right balance threaded hole 110 of the mandrel 1.
The motor mounting journal 14 of the mandrel 1 is provided with a ring of annular groove 111, and the cross section of the annular groove 111 is arc-shaped, rectangular or V-shaped. The bottom of one of the left balance threaded holes 19 is provided with a process hole 112, and the process hole 112 is communicated with the bottom of the annular groove 111 through an L-shaped process channel 113.
The motor component 3 comprises a rotor and a stator which are arranged inside and outside, the inner hole of the rotor is a taper hole, and the taper of the inner hole of the rotor is the same as that of the outer conical surface of the motor mounting journal 14 of the mandrel 1. The taper of the conical surface structure with the motor installation shaft neck 14 being small at the left and large at the right is set to be 1:50, and the rotor of the motor component 3 is tightly connected with the motor installation shaft neck 14 of the mandrel 1 through conical surface interference fit. During installation, a hydraulic device is adopted to send high-pressure oil into the annular groove 111 through the process hole 112 and the process channel 113, so that the high-pressure oil is filled in a gap between the rotor and the motor installation journal 14 of the mandrel 1, the inner hole of the rotor of the motor is expanded under the action of the high-pressure oil, the rotor is sleeved on the motor installation journal 14 of the mandrel 1, the high-pressure oil is removed after the rotor is installed in place, and the interference fastening connection between the rotor and the mandrel 1 can be realized. The whole motor assembly 3 is simple, convenient and quick to install and operate.
The right end of the mandrel 1 is also provided with an output connecting part 11, the output connecting part 11 is positioned on the right side of the right thrust journal 16, and power output is realized through an external execution part of the output connecting part 11 of the mandrel 1. The output connecting part 11 at the right end of the mandrel 1 is of a cylindrical structure with an inner tapered hole 115 and an outer thread, a collet 116 is inserted into the tapered hole 115 of the output connecting part 11, and the collet 116 is screwed into the outer side of the output connecting part 11 through a nut 117, so that the collet 116 is locked. When the cutter is installed, the cutter is installed in the spring chuck 116, and the nut 117 is screwed into the external thread section of the output connecting part 11 for fastening; when the tool is changed, the nut 117 is screwed down to change the tool.
Specifically, the spindle 1 forms a first positioning shoulder 17 for positioning the right end of the left radial bearing 2 between the left radial journal 13 and the motor mounting journal 14, and the spindle 1 forms a second positioning shoulder 18 for positioning the right end of the motor assembly 3 between the motor mounting journal 14 and the radial thrust journal 15.
Specifically, the left end face of the mandrel 1 is provided with an even number of magnetic sensing grooves 114 uniformly distributed along the circumferential direction, and the even number of magnetic sensing grooves 114 and the even number of left balance threaded holes 19 are distributed in a staggered manner along the circumferential direction. Magnetic-sensing induction recess 114 and speed sensor 8 correspond the setting, and dabber 1 left side is equipped with back seat 7, back seat 7 and whole electricity main shaft's shell 6 fixed connection, is equipped with speed sensor 8 on the back seat 7, and speed sensor 8's working face is aimed at any one magnetic-sensing induction recess 114 on the dabber 1 left end face for measure the rotational speed of dabber 1. The revolution speed sensor 8 may employ a differential magnetoresistive sensor.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The utility model provides a dabber structure of high speed air supporting electricity main shaft, includes dabber (1), its characterized in that: a left radial journal (13) used for mounting a left radial bearing (2), a motor mounting journal (14) used for mounting a motor assembly (3), a radial thrust journal (15) used for mounting a radial thrust bearing (4) and a right thrust journal (16) used for mounting a right thrust bearing (5) are sequentially arranged on the mandrel (1) from left to right, the motor mounting journal (14) is of a conical surface structure with a small left part and a large right part, the rest journals are of a straight cylindrical surface structure, the outer diameter of the radial thrust journal (15) is larger than that of the left radial journal (13), a thrust disc (12) protruding outwards in the radial direction is arranged on the mandrel (1) between the radial thrust journal (15) and the right thrust journal (16), an even number of left balance threaded holes (19) uniformly distributed along the circumferential direction are arranged on the left end face of the mandrel (1), and an even number of right balance threaded holes (110) uniformly distributed along the circumferential direction are arranged on the right end face of the mandrel, a motor mounting shaft neck (14) of the mandrel (1) is provided with a ring of annular grooves (111), the bottom of one left balance threaded hole (19) is provided with a process hole (112), and the process hole (112) is communicated with the bottom of the annular groove (111) through a process channel (113); the rotor of the motor component (3) is fixedly connected with the motor mounting journal (14) of the mandrel (1) through conical surface interference fit;
the right end of the mandrel (1) is further provided with an output connecting part (11), the output connecting part (11) is located on the right side of the right thrust journal (16), and power output is achieved through the output connecting part (11) of the mandrel (1) and an external execution component.
2. The spindle structure of a high-speed air-bearing motorized spindle as claimed in claim 1, wherein: the output connecting portion (11) at the right end of the mandrel (1) is of a cylindrical structure with a taper hole (115) formed therein and external threads arranged outside, a collet chuck (116) is inserted into the taper hole (115) of the output connecting portion (11), and the collet chuck (116) is locked by screwing a nut (117) into the outer side of the output connecting portion (11).
3. The spindle structure of a high-speed air-bearing motorized spindle as claimed in claim 1, wherein: the mandrel (1) forms a first positioning shaft shoulder (17) used for positioning the right end of the left radial bearing (2) between the left radial journal (13) and the motor mounting journal (14), and the mandrel (1) forms a second positioning shaft shoulder (18) used for positioning the right end of the motor assembly (3) between the motor mounting journal (14) and the radial thrust journal (15).
4. The spindle structure of a high-speed air-bearing motorized spindle as claimed in claim 1, wherein: the left end face of the mandrel (1) is provided with an even number of magnetic-sensitive induction grooves (114) which are uniformly distributed along the circumferential direction, and the even number of magnetic-sensitive induction grooves (114) and the even number of left balance threaded holes (19) are distributed in a staggered mode along the circumferential direction.
5. The spindle structure of a high-speed air-bearing motorized spindle as claimed in claim 1, wherein: the process channel (113) is L-shaped.
6. The spindle structure of a high-speed air-bearing motorized spindle as claimed in claim 1, wherein: the cross section of the annular groove (111) is arc-shaped, rectangular or V-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921360946.3U CN210231548U (en) | 2019-08-20 | 2019-08-20 | A mandrel structure of a high-speed air-floating electric spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921360946.3U CN210231548U (en) | 2019-08-20 | 2019-08-20 | A mandrel structure of a high-speed air-floating electric spindle |
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| Publication Number | Publication Date |
|---|---|
| CN210231548U true CN210231548U (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921360946.3U Active CN210231548U (en) | 2019-08-20 | 2019-08-20 | A mandrel structure of a high-speed air-floating electric spindle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110369737A (en) * | 2019-08-20 | 2019-10-25 | 中国科学院合肥物质科学研究院 | A kind of core shaft structure of high-speed air floatation electro spindle |
-
2019
- 2019-08-20 CN CN201921360946.3U patent/CN210231548U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110369737A (en) * | 2019-08-20 | 2019-10-25 | 中国科学院合肥物质科学研究院 | A kind of core shaft structure of high-speed air floatation electro spindle |
| CN110369737B (en) * | 2019-08-20 | 2024-01-09 | 中国科学院合肥物质科学研究院 | Mandrel structure of high-speed air-floatation motorized spindle |
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