CN210790536U - High-precision numerical control grinding machine double-end electric spindle - Google Patents
High-precision numerical control grinding machine double-end electric spindle Download PDFInfo
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- CN210790536U CN210790536U CN201921933613.5U CN201921933613U CN210790536U CN 210790536 U CN210790536 U CN 210790536U CN 201921933613 U CN201921933613 U CN 201921933613U CN 210790536 U CN210790536 U CN 210790536U
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- 238000007789 sealing Methods 0.000 claims abstract description 34
- 238000009826 distribution Methods 0.000 claims abstract description 18
- 230000002093 peripheral effect Effects 0.000 claims abstract description 10
- 230000000295 complement effect Effects 0.000 claims abstract description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000009191 jumping Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004534 cecum Anatomy 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The double-end electric spindle comprises an air seal structure, wherein the air seal structure comprises a large cover and an air seal cover, the air seal cover consists of an outer ring piece and an inner ring piece fixed together with the outer ring piece, an annular groove is formed in the outer peripheral surface of the inner ring piece or the inner peripheral surface of the outer ring, the annular groove forms an air chamber, a plurality of radial air distribution blind holes are formed in the peripheral surface of the inner ring piece, small holes which are axially communicated with the outer surface of the inner ring piece are formed in the bottoms of the air distribution blind holes, a plurality of labyrinth seal annular grooves are formed in the surface, close to the center, of the inner ring piece, labyrinth seal rings which are complementary with the labyrinth seal annular grooves are arranged on the inner surface of the seal cover, a grinding wheel rod is provided with a through hole which is axially communicated, threads are machined at the tail end of the through hole, a positioning sleeve is screwed. The spindle has high precision and good sealing.
Description
Technical Field
The utility model relates to an electricity main shaft, in particular to double-end electricity main shaft for numerically control grinder belongs to and equips technical field.
Background
A high-precision numerical control grinding machine is important basic equipment for precision manufacturing, an electric spindle on the grinding machine requires large volume torque, small heat productivity, high precision and good sealing performance, the double-head permanent magnetic spindle can realize large torque and small heat productivity, the two ends of the double-head electric spindle are identical in structure and are provided with grinding wheel rods, the electric spindle can arbitrarily clamp the 150mm part of the lower grinding wheel rod at 360 degrees and has the run-out smaller than 0.002mm, the run-out can be realized only by simultaneously positioning a conical surface and an end surface, the grinding wheel rods are arranged on the spindle, the grinding wheels are arranged on the grinding wheel rods, the manufacturing precision requirements on the spindle and the grinding wheel rods are very high, the current mounting and combining structure of the spindle and the grinding wheel rods is that a conical hole 4 is inwards arranged on the outer end surface of the spindle 3, the conical surface of the conical hole 4 is a conical surface positioning surface, the outer end surface of the spindle 3 is an end, the grinding wheel rod is provided with a conical surface 21 and an end surface 22 which are matched with the conical hole, a screw rod 23 is integrally connected behind the conical surface, a small gap is reserved between the conical surface and the conical hole, the conical surface and the conical hole are combined together after the screw rod is screwed into the threaded hole during installation, interference can be generated during connection due to the existence of the screw rod under the installation structure, the simultaneous positioning of the conical surface and the end surface is difficult to ensure, and the simultaneous positioning of the conical surface and the end surface means that the conical surface and the end surface are simultaneously positioned and attached to the two positioning surfaces, so that even if the machining precision of each part meets the design requirement, the jumping quantity of the part does not meet the requirement during detection test after installation, repeated adjustment is needed, even certain parts need to be re-machined, and under the assembly structure, the jumping requirement can be met even when the grinding wheel rod leaves a factory, the jumping of the grinding, and in use, the out-of-tolerance run-out is difficult to adjust; the sealing performance of the double-end electric spindle is also a problem which is difficult to solve at present, the sealing requirement is particularly high due to the severe working environment, and a lot of problems which appear in use are found to be related to sealing The precision is reduced, and the normal use of the grinding machine is seriously influenced.
Disclosure of Invention
An object of the utility model is to overcome the above-mentioned problem that exists of the double-end electric main shaft on present grinding machine, provide a kind of high-accuracy numerical control double-end electric main shaft for grinding machine.
In order to realize the purpose of the utility model, the following technical proposal is adopted: a double-head electric spindle for a high-precision numerical control grinding machine comprises a shell, wherein a stator is arranged in the shell, the spindle wound with a winding is supported and penetrated in the shell through a bearing as a rotating shaft, two outer end faces of the spindle are respectively provided with a conical hole for assembling a grinding wheel rod, the center of the bottom surface of the conical hole is provided with a threaded hole, the grinding wheel rod is provided with a conical surface and an end face integrated with the conical surface, the tail part of the conical surface is provided with a screw for connecting with the threaded hole, two head parts of the double-head electric spindle are respectively provided with an air sealing structure, the air sealing structure comprises a large cover, the large cover is provided with a radial air passage, the radial air passage is communicated with an axial air passage, the air sealing structure further comprises an air sealing cover, the air sealing cover is fixedly connected on the large cover, the air sealing cover consists of an outer ring piece and an inner ring piece fixed together with the outer ring piece, and the inner ring piece is provided with an axial air, the axial air hole on the inner ring sheet is communicated with the axial air passage on the large cover, the outer peripheral surface of the inner ring sheet or the inner peripheral surface of the outer ring is provided with an annular groove, the annular groove is communicated with the radial air hole, the radial air hole is a blind hole inwards in the radial direction, the circumferential surface of the inner ring sheet is provided with a plurality of radial air distribution blind holes, the bottoms of the air distribution blind holes are provided with small holes which are axially communicated to the outer surface of the inner ring sheet, and the diameter of each small hole is 1-1.5 mm; the surface of the inner ring piece close to the center is provided with a plurality of labyrinth seal ring grooves, the small hole is positioned at the seal ring groove, the main shaft is fixedly connected with a seal cover through threads, the seal cover is positioned in the inner ring piece, the inner surface of the seal cover is provided with labyrinth seal rings which are complementary with the labyrinth seal ring grooves, a gap is formed between the seal ring and the inner ring piece, and gas blown out of the small hole is blown out of the gap;
the grinding wheel rod is provided with a through hole which is axially communicated, the tail end of the through hole is provided with a thread, the tail end refers to the end part in the direction of the conical surface, the periphery of the positioning sleeve is also provided with a thread, the positioning sleeve is screwed in the through hole, the screw is arranged in the positioning sleeve in a penetrating way, the head part of the bolt is axially limited on the end surface of the positioning sleeve, and the head part of the bolt is positioned in the through hole; a gap is reserved between the screw and the inner wall of the positioning sleeve.
Further, the method comprises the following steps of; the number of the air distribution blind holes is 6.
Further, the method comprises the following steps of; the clearance between the radial minimum part of the sealing cover and the radial maximum part of the inner ring sheet is 0.3-0.4 mm.
Further, the method comprises the following steps of; the conical surface is provided with a jackscrew through hole, a jackscrew is screwed in the jackscrew through hole, and the jackscrew is jacked on the positioning sleeve.
Further, the method comprises the following steps of; the through hole is a reducing hole, the through hole at the end part of the conical surface is large, and the other end of the through hole is small.
The utility model discloses an actively beneficial technological effect lies in: the main shaft achieves the following two effects: firstly, can guarantee that the beating of grinding wheel pole 150mm department is less than 0.002mm under 360 degrees arbitrary clamps are adorned, secondly greatly improve the sealing performance of main shaft, can satisfy the sealed requirement of numerically control grinder under adverse conditions.
Drawings
FIG. 1 is a schematic view of an electric spindle without a grinding wheel spindle.
Fig. 2 is a schematic cross-sectional view of a large lid.
Fig. 3 is a schematic cross-sectional view of the air-tight lid.
Fig. 4 is an axial front-rear direction schematic view of the air cap.
Fig. 5 is a schematic view of a sealing cap.
Fig. 6 is a schematic view of a grinding wheel spindle.
Fig. 7 is a schematic view of a raw grinding wheel bar.
Detailed Description
In order to explain the utility model more fully, the utility model provides an implementation example. These examples are merely illustrative of the present invention and do not limit the scope of the present invention.
The utility model is explained in detail with the attached drawings, and the air seal structure and the grinding wheel rod mounting structure at the two ends of the double-head electric spindle are the same. The various references in the drawings are: 1: a housing; 2: a stator; 3: a main shaft; 4: a tapered hole; 5: a threaded hole; 6: an outer end face; 7: a large cover; 8: sealing the cover in air; 9: a sealing cover; 10: an outer ring plate; 11: an inner ring sheet; 12: an annular groove; 121: a vertex line of the annular groove; 13, axial gas channel; 14: a radial gas passage; 15: an axial air hole; 16: a radial air hole; 17: labyrinth sealing ring groove; 18: gas distribution blind holes; 19: a small hole; 20: a labyrinth seal ring; 21: a conical surface; 22: an end face; 23: a screw; 24: a through hole; 25: a screw; 26: a positioning sleeve; 27: and (5) jacking the screw.
As shown in the attached drawings, the double-head electric spindle for the high-precision numerical control grinding machine comprises a shell 1, a stator 2 is installed in the shell, a spindle 3 wound with a winding is supported and penetrated in the shell through a bearing as a rotating shaft, two outer end faces of the spindle are respectively provided with a tapered hole 4 for assembling a grinding wheel rod, the center of the bottom face of the tapered hole is provided with a threaded hole 5, the grinding wheel rod is provided with a conical surface 21 and an end face 22 integrated with the conical surface, the tail part of the conical surface is provided with a screw 25 for connecting with the threaded hole, two head parts of the double-head electric spindle are respectively provided with an air sealing structure, the air sealing structure comprises a large cover 6, a radial air passage 14 is formed in the large cover, an axial air passage 13 is communicated with the radial air passage on the large cover, the radial air passage on the large cover is communicated with an air supply passage on the shell, the axial air passage is also started on the large cover, the air sealing cover is fixedly connected to the big cover 7, the air sealing cover is composed of an outer ring piece 10 and an inner ring piece 11 fixed with the outer ring piece, the outer ring piece and the inner ring piece can be tightly combined together by hot pressing, the purpose of combining the outer ring piece and the inner ring piece is to process a ring-shaped groove, the inner ring piece is provided with an axial air hole 15 and a radial air hole 16 which are communicated, the axial air hole 15 on the inner ring is communicated with an axial air passage 13 on the big cover, the outer peripheral surface of the inner ring or the inner peripheral surface of the outer ring is provided with a ring-shaped groove 12, the ring-shaped groove is communicated with the radial air hole 16, the radial air hole is a blind hole inwards in the radial direction, the peripheral surface of the inner ring piece is provided with a plurality of radial air distribution blind holes, 18 is an air distribution blind hole, in the embodiment, the number of the air distribution blind holes is 6, as shown in figure 4, the 6 air distribution blind holes are uniformly distributed, the bottom of the air, the diameter of the small hole is 1-1.5mm, a plurality of labyrinth seal ring grooves are formed in the surface, close to the center, of the inner ring piece, as shown in 17, the labyrinth seal ring grooves are a plurality of ring surfaces with different heights, the small hole is located in the seal ring groove, a seal cover 9 is fixedly connected to the main shaft through threads, the seal cover is located in the inner ring piece 11, and the gap between the radial minimum part of the seal cover and the radial maximum part of the inner ring piece is 0.3-0.4 mm; the sealing cover has a labyrinth sealing ring on its inner surface, which is complementary to the plurality of labyrinth sealing ring grooves, as shown at 20, the labyrinth sealing ring is integrated with the sealing cover, the labyrinth sealing ring is also a plurality of ring surfaces with different heights processed on the inner ring surface, a gap is provided between the sealing ring and the inner ring sheet, and the gas blown out from the small hole is blown out from the gap.
The grinding wheel rod comprises a conical surface 21 and an end surface 22 integrated with the conical surface, the grinding wheel rod is provided with a through hole 24 which is communicated successively, the through hole is a diameter-variable hole, the inner end is large, the outer end is small, the rear end of the through hole is provided with a thread, the periphery of a positioning sleeve 26 is also provided with a thread, the positioning sleeve is screwed in the through hole, a screw 25 is arranged in the positioning sleeve in a penetrating way, the head axial direction of a bolt is limited on the end surface of the positioning sleeve, the head part of the screw is arranged in the through hole, a gap is arranged between the screw and the inner wall of the positioning sleeve, a jackscrew through hole is arranged on the conical surface, a jackscrew 27 is screwed. In the grinding wheel rod structure, because the screw has a certain degree of freedom in the positioning sleeve, the screw can not generate rigid interference on the positioning of the conical surface and the end surface simultaneously during the positioning, the positioning precision can be well ensured, the structure can completely meet the requirement of the end part jumping of the grinding wheel rod,
in this gas seal mechanism of main shaft, high-pressure gas footpath protecgulum gets into radial gas pocket through the axial gas pocket of inner ring piece, because radial gas pocket is the cecum inwards, so gaseous to the annular groove direction flow, the annular groove actually forms the air chamber, get into 6 gas distribution blind holes in the annular groove, finally blow off to labyrinth seal department from the aperture, because the big and labyrinth seal ring department shape of sealed lid diameter has the convex-concave, have better carrying effect to gaseous, make the seal gas make the upwards distribution of circumference even, flow in the clearance between sealing ring and the sealed lid, realize good sealed effect. In the research of the applicant, the sealing cover is not adopted, the air distribution blind hole is radially opened, the air is radially blown to the main shaft, the multi-point air distribution is sealed by the rotation of the main shaft, the effect is better than that of single air inlet, but the whole sealing performance is poor. The scheme of the air distribution blind hole and the axial air outlet small hole formed at present (namely the scheme of the application) finds that the sealing performance is the best, can completely meet the use requirement of friction under severe working conditions, and is even superior to the sealing performance of similar products of certain foreign brands (but the price is much cheaper than that of foreign brands).
After the embodiments of the present invention have been described in detail, those skilled in the art can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above claims, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention all fall within the scope of the technical solution of the present invention, and the present invention is not limited to the embodiments of the examples given in the specification.
Claims (5)
1. The utility model provides a high accuracy numerical control is double-end electricity main shaft for grinding machine, includes the casing, installs the stator in the casing, and the winding has wire-wound main shaft to support as the pivot through the bearing and wears to establish in the casing, all offers the bell mouth that is used for assembling the grinding wheel pole at two outer terminal surfaces of main shaft, threaded hole is seted up at the bottom surface center of bell mouth, the grinding wheel pole have a conical surface and one with conical surface integrative terminal surface, the afterbody of conical surface is provided with the screw that is used for being connected with the screw hole, all is provided with its characterized in that of atmoseal structure on two heads of double-end: the gas seal structure comprises a large cover, wherein a radial gas passage is formed in the large cover, an axial gas passage is communicated with the radial gas passage, the gas seal structure also comprises a gas seal cover, the gas seal cover is fixedly connected to the large cover, the gas seal cover consists of an outer ring plate and an inner ring plate fixed together with the outer ring plate, the inner ring plate is provided with an axial gas hole and a radial gas hole which are communicated, the axial gas hole in the inner ring plate is communicated with the axial gas passage in the large cover, the outer peripheral surface of the inner ring plate or the inner peripheral surface of the outer ring is provided with an annular groove, the annular groove is communicated with the radial gas hole, the radial gas hole is a blind hole inwards in the radial direction, the circumferential surface of the inner ring plate is provided with a plurality of radial gas distribution blind holes, the bottom of the gas distribution blind holes is provided with small holes axially communicated to the outer surface of the inner ring plate, and the diameter of the small holes is 1; the surface of the inner ring piece close to the center is provided with a plurality of labyrinth seal ring grooves, the small hole is positioned at the seal ring groove, the main shaft is fixedly connected with a seal cover through threads, the seal cover is positioned in the inner ring piece, the inner surface of the seal cover is provided with labyrinth seal rings which are complementary with the labyrinth seal ring grooves, a gap is formed between the seal ring and the inner ring piece, and gas blown out of the small hole is blown out of the gap;
the grinding wheel rod is provided with a through hole which is axially communicated, the tail end of the through hole is provided with a thread, the tail end refers to the end part in the direction of the conical surface, the periphery of the positioning sleeve is also provided with a thread, the positioning sleeve is screwed in the through hole, the screw is arranged in the positioning sleeve in a penetrating way, the head part of the bolt is axially limited on the end surface of the positioning sleeve, and the head part of the bolt is positioned in the through hole; a gap is reserved between the screw and the inner wall of the positioning sleeve.
2. The double-headed electric spindle for a high-precision numerically controlled grinding machine according to claim 1, characterized in that: the number of the air distribution blind holes is 6.
3. The double-headed electric spindle for a high-precision numerically controlled grinding machine according to claim 1, characterized in that: the clearance between the radial minimum part of the sealing cover and the radial maximum part of the inner ring sheet is 0.3-0.4 mm.
4. The double-headed electric spindle for a high-precision numerically controlled grinding machine according to claim 1, characterized in that: the conical surface is provided with a jackscrew through hole, a jackscrew is screwed in the jackscrew through hole, and the jackscrew is jacked on the positioning sleeve.
5. The double-headed electric spindle for a high-precision numerically controlled grinding machine according to claim 1, characterized in that: the through hole is a reducing hole, the through hole at the end part of the conical surface is large, and the other end of the through hole is small.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921933613.5U CN210790536U (en) | 2019-11-11 | 2019-11-11 | High-precision numerical control grinding machine double-end electric spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921933613.5U CN210790536U (en) | 2019-11-11 | 2019-11-11 | High-precision numerical control grinding machine double-end electric spindle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210790536U true CN210790536U (en) | 2020-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921933613.5U Withdrawn - After Issue CN210790536U (en) | 2019-11-11 | 2019-11-11 | High-precision numerical control grinding machine double-end electric spindle |
Country Status (1)
| Country | Link |
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| CN (1) | CN210790536U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110695848A (en) * | 2019-11-11 | 2020-01-17 | 安阳德一机床附件制造有限公司 | High-precision numerical control grinding machine double-end electric spindle |
-
2019
- 2019-11-11 CN CN201921933613.5U patent/CN210790536U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110695848A (en) * | 2019-11-11 | 2020-01-17 | 安阳德一机床附件制造有限公司 | High-precision numerical control grinding machine double-end electric spindle |
| CN110695848B (en) * | 2019-11-11 | 2024-05-14 | 安阳德一机床附件制造有限公司 | Double-end motorized spindle for high-precision numerical control grinding machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200619 Effective date of abandoning: 20240514 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200619 Effective date of abandoning: 20240514 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |