CN214557452U - Small-size pneumatic drive's compound electric main shaft of turnning and milling - Google Patents
Small-size pneumatic drive's compound electric main shaft of turnning and milling Download PDFInfo
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- CN214557452U CN214557452U CN202120175282.4U CN202120175282U CN214557452U CN 214557452 U CN214557452 U CN 214557452U CN 202120175282 U CN202120175282 U CN 202120175282U CN 214557452 U CN214557452 U CN 214557452U
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Abstract
The utility model relates to a small-sized pneumatic-driven turning and milling composite electric main shaft, which consists of a sleeve, a main shaft stator, a main shaft rotor, a front bearing group, a rear bearing group, a front bearing seat, a rear bearing seat, a fixed gear disc, a rotary gear disc and a piston gear disc, wherein the sleeve, the main shaft stator and the main shaft rotor are concentrically arranged, and the main shaft rotor is supported by the front bearing group and the rear bearing group; the sleeve is provided with an annular cavity and an air channel communicated with the annular cavity, the front end of the annular cavity is provided with a piston fluted disc, the front end of the piston fluted disc is provided with a return spring, and the piston fluted disc moves back and forth along the annular cavity under the action of air pressure and the return spring; the fixed fluted disc is connected to the rear end of the front bearing seat, and the rotary fluted disc is positioned between the fixed fluted disc and the main shaft rotor and is fixedly connected with the main shaft rotor; the fixed gear and the rotating gear can be simultaneously meshed with the piston gear. The utility model discloses compact structure does benefit to the cutter and keeps away the sky, and the power supply is taken convenience, easy to maintain, low in production cost, can improve bearing life.
Description
Technical Field
The utility model belongs to the digit control machine tool field, in particular to small-size pneumatically driven turn-milling composite electric main shaft.
Background
The turning and milling combined machining center is a machine tool with combined machining functions of turning, milling and the like, can realize the purpose that workpieces are clamped once to complete machining of various procedures, is convenient for machining of complex special-shaped parts, avoids the problems that precision loss and reference are not unified and the like caused by secondary clamping, can improve machining precision, and shortens auxiliary machining time.
At present, most turning and milling composite machining centers share a main shaft, a three-fluted-disc mechanism is generally adopted to fix a main shaft rotor when the turning is converted from milling to milling, the three-fluted-disc mechanism is usually positioned at the front end of a front bearing of the main shaft, the structure enables the head of the main shaft to be large, the main shaft is not beneficial to space avoidance of a cutter during machining, and although the space avoidance problem can be solved by lengthening the cutter, the rigidity is easy to reduce. In addition, the existing three-fluted-disc mechanism basically adopts oil pressure as power, a special hydraulic pump station is needed to provide a power source, the maintenance cost is high, and the oil pressure of the three fluted disc and the turning force during turning can be decomposed and act on the bearing, so that the service life of the bearing is greatly shortened.
Disclosure of Invention
An object of the utility model is to overcome prior art not enough, provide a compact structure, the power supply is taken convenient, easy to maintain, low in production cost's compound electric main shaft of turnning and milling, not only does benefit to the cutter and keeps away the sky, and turning power does not act on the bearing moreover, can improve bearing life.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme: a small-sized pneumatic-driven turning and milling composite electric main shaft comprises a sleeve, a main shaft stator, a main shaft rotor, a front bearing group, a rear bearing group, a front bearing seat, a rear bearing seat, a fixed gear disc, a rotary gear disc and a piston gear disc, wherein the main shaft stator is arranged on the inner wall of the sleeve; the sleeve is provided with an annular cavity and an air channel communicated with the annular cavity, the front end of the annular cavity is provided with a piston fluted disc, the front end of the piston fluted disc is provided with a return spring, and the piston fluted disc moves back and forth along the annular cavity under the action of air pressure and the return spring; the fixed fluted disc is connected to the rear end of the front bearing seat, and the rotary fluted disc is positioned between the fixed fluted disc and the main shaft rotor and is fixedly connected with the main shaft rotor; the fixed gear and the rotating gear can be simultaneously meshed with the piston gear.
According to the small-sized pneumatic-driven turning and milling composite electric spindle, the unloading gap is formed between the rotary fluted disc and the front bearing seat, and when the rotary fluted disc is meshed with the piston fluted disc, the unloading gap is zero.
According to the small-sized pneumatically-driven turning and milling composite electric spindle, the fixed gear disc is uniformly provided with the plurality of accommodating cavities, and the reset springs are distributed in the accommodating cavities.
According to the small-sized pneumatic-driven turning and milling composite electric spindle, the rear bearing block is internally provided with the constant-pressure pre-tightening device which acts on the outer ring of the rear bearing group.
Compared with the prior art, the beneficial effects of the utility model reside in that: the three-fluted-disc brake device is arranged at the rear end of the front bearing group, the integration level is high, the outer diameter of the original main shaft is not increased, the diameter of the front end of the main shaft is not increased, the clearance of a cutter during processing is favorably avoided, and the three-fluted-disc brake device is suitable for more processing working conditions; and by arranging the unloading gap, the force of the brake rotor is completely acted on the fluted disc when the three fluted discs are meshed, the turning force and the air pressure thrust force are unrelated to the bearing, and the service life of the bearing is not reduced. In addition, the utility model discloses a pneumatic drive, the energy is clean, and it is convenient to maintain.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the utility model discloses a small-size pneumatic drive's compound electric main shaft of turnning and milling comprises sleeve 1, main shaft stator 2, main shaft rotor 3, front bearing group 4, rear bearing group 5, front axle bearing 6, rear axle bearing 7, fixed fluted disc 8, rotatory fluted disc 9 and piston fluted disc 10.
The front bearing seat 6 and the rear bearing seat 7 are arranged at the front end and the rear end of the sleeve 1, and the front bearing group 4 and the rear bearing group 5 are respectively arranged in the front bearing seat 6 and the rear bearing seat 7. The main shaft stator 2 is arranged on the inner wall of the sleeve 1, and the main shaft rotor 3 is positioned in an inner hole of the main shaft stator 2 and is supported by a front bearing group 5 and a rear bearing group 6. And a constant-pressure pre-tightening spring 14 is arranged in the rear bearing seat 7 and acts on the outer ring of the rear bearing group 5 to form constant-pressure pre-tightening on the front bearing group 4 and the rear bearing group 5.
Fixed toothed disc 8 is coupled to the rear end of front bearing block 6, and rotating toothed disc 9 is located between fixed toothed disc 8 and main shaft rotor 3, and is fixedly coupled to main shaft rotor 3 so as to be rotatable together with main shaft rotor 3. The sleeve 1 is provided with an annular cavity 11, a piston fluted disc 10 is arranged at the front end of the annular cavity 11, an air channel 12 communicated with the annular cavity 11 is formed in the sleeve 1, a return spring 13 is arranged at the front end of the piston fluted disc 10, the return spring 13 is uniformly distributed in the accommodating cavity of the fixed fluted disc 8, and the piston fluted disc 10 can move back and forth along the annular cavity 11 under the action of air pressure and the return spring 13. The fixed toothed disk 8 and the rotary toothed disk 9 can simultaneously mesh with the piston toothed disk 10.
An unloading gap delta is also arranged between the rotary fluted disc 9 and the front bearing seat 6, when the piston fluted disc 10 is meshed with the rotary fluted disc 9 under the action of air pressure, the unloading gap delta becomes zero, and the air pressure and turning force do not act on the bearing.
The utility model discloses when milling process, to 2 interior circular telegrams of main shaft stator, main shaft stator 2 and 3 interact of main shaft rotor, drive main shaft rotor 3 rotates, at this moment, keeps off-load clearance delta between rotatory fluted disc 9 and the front axle bearing. When the main shaft is provided with a turning tool, compressed gas is introduced into the gas channel 12, the piston fluted disc 10 moves forwards along the annular cavity 11 under the action of gas pressure, so that the piston fluted disc 10 is meshed with the fixed fluted disc 8 and the rotary fluted disc 9, meanwhile, the return spring 13 is compressed, the rotary fluted disc 9 moves forwards under the action of thrust, the unloading gap delta becomes zero, the rotary fluted disc 9 is attached to the front bearing seat 6 on one hand, and on the other hand, the inner ring of the front bearing group 4 is pushed to move forwards slightly, so that the inner ring and the outer ring of the front bearing group 4 are slightly separated, a ball in the bearing is free of the action of force, and turning can be performed at the moment. After the turning is finished, gas supply to the gas channel 12 is stopped, the piston fluted disc 10 moves backwards under the action of the return spring 13, the meshing between the fixed fluted disc 8 and the rotary fluted disc 9 is further released, and the inner ring and the outer ring of the front bearing group 4 are reset under the action of the constant-pressure pre-tightening spring 14. When the spindle stator 2 is energized again, milling can be performed.
Although the present invention has been described in detail, the present invention is not limited thereto, and those skilled in the art can make various modifications according to the principle of the present invention. Therefore, modifications made in accordance with the principles of the present invention should be understood to fall within the scope of the present invention.
Claims (4)
1. A small-sized pneumatic-driven turning and milling composite electric spindle is characterized by comprising a sleeve, a spindle stator, a spindle rotor, a front bearing group, a rear bearing group, a front bearing seat, a rear bearing seat, a fixed gear disc, a rotary gear disc and a piston gear disc, wherein the spindle stator is arranged on the inner wall of the sleeve; the sleeve is provided with an annular cavity and an air channel communicated with the annular cavity, the front end of the annular cavity is provided with a piston fluted disc, the front end of the piston fluted disc is provided with a return spring, and the piston fluted disc moves back and forth along the annular cavity under the action of air pressure and the return spring; the fixed fluted disc is connected to the rear end of the front bearing seat, and the rotary fluted disc is positioned between the fixed fluted disc and the main shaft rotor and is fixedly connected with the main shaft rotor; the fixed gear and the rotating gear can be simultaneously meshed with the piston gear.
2. The small pneumatically driven turning and milling composite electric spindle according to claim 1, wherein an unloading gap is provided between the rotary toothed disc and the front bearing seat, and the unloading gap is zero when the rotary toothed disc and the piston toothed disc are engaged.
3. The small-sized pneumatically-driven turning and milling composite electric spindle according to claim 2, wherein a plurality of accommodating cavities are uniformly formed in the fixed gear disc, and the return springs are distributed in the accommodating cavities.
4. A small-sized pneumatic-driven turning and milling composite electric spindle according to claim 1, 2 or 3, characterized in that a constant-pressure pre-tightening device is arranged in the rear bearing seat and acts on the outer ring of the rear bearing group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120175282.4U CN214557452U (en) | 2021-01-22 | 2021-01-22 | Small-size pneumatic drive's compound electric main shaft of turnning and milling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120175282.4U CN214557452U (en) | 2021-01-22 | 2021-01-22 | Small-size pneumatic drive's compound electric main shaft of turnning and milling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214557452U true CN214557452U (en) | 2021-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120175282.4U Active CN214557452U (en) | 2021-01-22 | 2021-01-22 | Small-size pneumatic drive's compound electric main shaft of turnning and milling |
Country Status (1)
| Country | Link |
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| CN (1) | CN214557452U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117245107A (en) * | 2023-10-19 | 2023-12-19 | 江苏华雕机械有限公司 | High-speed machine tool electric spindle with replaceable rotating assembly |
-
2021
- 2021-01-22 CN CN202120175282.4U patent/CN214557452U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117245107A (en) * | 2023-10-19 | 2023-12-19 | 江苏华雕机械有限公司 | High-speed machine tool electric spindle with replaceable rotating assembly |
| CN117245107B (en) * | 2023-10-19 | 2024-04-09 | 江苏华雕机械有限公司 | High-speed machine tool electric spindle with replaceable rotating assembly |
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