CN210702603U - Central electric spindle for numerical control machining - Google Patents
Central electric spindle for numerical control machining Download PDFInfo
- Publication number
- CN210702603U CN210702603U CN201921664071.6U CN201921664071U CN210702603U CN 210702603 U CN210702603 U CN 210702603U CN 201921664071 U CN201921664071 U CN 201921664071U CN 210702603 U CN210702603 U CN 210702603U
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- China
- Prior art keywords
- steel plate
- shaft seal
- pressing sheet
- shaft
- spring
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000003754 machining Methods 0.000 title description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 238000003825 pressing Methods 0.000 claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 230000005611 electricity Effects 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 abstract 1
- 238000003801 milling Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model provides an electric main shaft of a numerical control machining center, which comprises a shell, a stator and a shaft core, wherein the shell is provided with a main shaft sealing structure; the main shaft sealing structure comprises a first steel plate, a second steel plate, a shaft seal and a plurality of elastic devices; the shaft is arranged in the first steel plate in a sealing way, the first steel plate is provided with a plurality of grooves, and elastic devices are arranged in the corresponding grooves; the elastic device comprises a spring and a pressing sheet, the pressing sheet is in an arc shape, one end of the spring is fixedly connected with a convex surface of the pressing sheet, and the other end of the spring is tightly attached to the inner wall of the groove; the concave surface of the pressing sheet is tightly attached to the shaft in a sealing way; the second steel plate is fixedly connected with the first steel plate, and the second steel plate covers the groove. The spring is always in a compressed state to generate thrust to the pressing sheet, the thrust is also transmitted to the shaft seal due to the fact that the pressing sheet is tightly attached to the shaft seal, if the shaft seal is abraded, the thrust can enable the unworn part of the shaft seal to be supplemented to the abraded position, therefore, the sealing function of the shaft seal is continuously kept, and leakage caused by abrasion is avoided.
Description
Technical Field
The utility model relates to a machine tool machining equipment technical field specifically is a numerical control machining center electricity main shaft.
Background
Machining centers have evolved from numerically controlled milling machines. The numerical control milling machine is different from a numerical control milling machine in that the machining center has the capability of automatically exchanging machining tools, and the machining tools on the main shaft can be changed through the automatic tool changing device in one-time clamping by installing tools with different purposes on the tool magazine, so that multiple machining functions are realized. The numerical control machining center is a high-efficiency automatic machine tool which consists of mechanical equipment and a numerical control system and is suitable for machining complex parts. The numerical control machining center is one of numerical control machines with highest yield and most extensive application in the world at present. After the machined part is clamped for one time, the numerical control system can control the machine tool to automatically select and replace the cutter according to different procedures;
in order to ensure the processing precision of the numerical control processing center, a power mechanism of the numerical control processing center generally adopts an electric main shaft; the electric Spindle is an abbreviation of a High Frequency Spindle (High Frequency Spindle), sometimes also referred to as a Direct Drive Spindle, and is a built-in motor Spindle unit. The electric main shaft shortens the length of a main transmission chain of the machine tool to zero, realizes zero transmission of the machine tool, and has the advantages of compact structure, high mechanical efficiency, extremely high rotation speed, high rotation precision, low noise, small vibration and the like; however, due to the high-speed rotation of the electric spindle of the numerical control machining center, the shaft seal is easy to wear, and leakage can be caused.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the technical problem that the shaft seal of the central electric spindle in the traditional numerical control machining is easy to wear and cause leakage is solved.
The utility model provides an electric main shaft of a numerical control machining center, which comprises a shell, a stator and a shaft core, wherein the shell is provided with a main shaft sealing structure;
the main shaft sealing structure comprises a first steel plate, a second steel plate, a shaft seal and a plurality of elastic devices;
the shaft is arranged in the first steel plate in a sealing manner, the first steel plate is provided with a plurality of grooves, and the elastic devices are arranged in the corresponding grooves;
the elastic device comprises a spring and a pressing sheet, the pressing sheet is in an arc shape, one end of the spring is fixedly connected with a convex surface of the pressing sheet, and the other end of the spring is tightly attached to the inner wall of the groove; the concave surface of the pressing sheet is tightly attached to the shaft in a sealing way;
the second steel plate is fixedly connected with the first steel plate, and the second steel plate covers the groove.
The pressing sheet is in an arc shape, the contact area between the pressing sheet and the shaft seal is increased, and according to a pressure formula: the pressure on the shaft seal is reduced, so that the damage of the pressing sheet to the shaft seal is reduced; the spring is in a compressed state, thrust is generated on the pressing sheet, the pressing sheet is tightly attached to the shaft seal, the thrust is also transmitted to the shaft seal, if the shaft seal is worn, the thrust can make the unworn part of the shaft seal supplemented to the worn position, so that the sealing function of the shaft seal is continuously maintained, and leakage caused by wear is avoided; the second steel plate presses on the groove, so that the elastic device is fixed in the groove, and the function of pressing the shaft seal by the elastic device is kept.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a cross-sectional view of the present invention;
FIG. 2 is an enlarged partial view of the spindle seal arrangement;
FIG. 3 is a schematic structural view of a first steel plate;
FIG. 4 is a schematic view of the structure of the elastic device
In the figure: 1. a main shaft sealing structure; 11. a first steel plate; 12 a second steel plate; 13. shaft sealing; 14. an elastic device; 111. a groove; 141. a spring; 142. and (6) tabletting.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
As shown in fig. 1, the utility model relates to an electric spindle of a numerical control machining center, which comprises a shell, a stator and a spindle core, wherein the shell is provided with a spindle sealing structure 1;
the main shaft sealing structure 1 comprises a first steel plate 11, a second steel plate 12, a shaft seal 13 and three elastic devices 14;
as shown in fig. 2, the first steel plate 11 is a front end cover of the main shaft of the central electric spindle for numerical control machining, the outer end of the first steel plate is provided with a step, the shaft seal 13 is installed on the step, the outer side of the step is provided with three grooves 111, and an elastic device 14 is installed inside each groove 111;
as shown in fig. 3, the elastic device 14 includes a spring 141 and a pressing plate 142, the pressing plate 142 is an arc-shaped plate, one end of the spring 141 is fixedly connected with the center of the convex surface of the pressing plate 142, and the other end of the spring 141 is tightly attached to the inner wall of the groove 111; the concave surface of the pressing plate 142 is tightly attached to the shaft seal 13 and the inner diameter of the pressing plate 142 is equal to the outer diameter of the shaft seal 13, so that the contact area between the pressing plate 142 and the shaft seal 13 is the largest according to the pressure formula: the pressure to which the shaft seal 13 is subjected is minimal, and thus the damage to the shaft seal 13 by the pressing piece 142 is minimal; the spring 141 is in a compressed state, a thrust is generated on the pressing sheet 142, the pressing sheet 142 is tightly attached to the shaft seal 13, the thrust is also transmitted to the shaft seal 13, if the shaft seal 13 is worn, the thrust can make the unworn part of the shaft seal 13 supplement to the worn position, so that the sealing function of the shaft seal 13 is continuously maintained, and leakage caused by wear is avoided;
the second steel plate 12 is fixedly connected with the first steel plate 11 through a fastener, the second steel plate 12 covers all the grooves 111, and the elastic device 14 is fixed in the grooves 111, so that the function of the elastic device 14 for pressing the shaft seal 13 is maintained.
The utility model provides a shaft seal 13 because the high-speed rotation of main shaft and wearing and tearing to make numerical control machining center electricity main shaft produce the problem of leaking, under resilient means 14's effect, even shaft seal 13 receives wearing and tearing, also can continue to use, prolonged shaft seal 13's life-span, thereby the cost is reduced has improved production efficiency.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (1)
1. The utility model provides a numerical control machining center electricity main shaft, includes shell, stator and axle core, its characterized in that: the shell is provided with a main shaft sealing structure (1);
the main shaft sealing structure (1) comprises a first steel plate (11), a second steel plate (12), a shaft seal (13) and a plurality of elastic devices (14);
the shaft seal (13) is mounted inside the first steel plate (11), the first steel plate (11) is provided with a plurality of grooves (111), and the elastic devices (14) are mounted in the corresponding grooves (111);
the elastic device (14) comprises a spring (141) and a pressing sheet (142), the pressing sheet (142) is arc-shaped, one end of the spring (141) is fixedly connected with a convex surface of the pressing sheet (142), and the other end of the spring (141) is tightly attached to the inner wall of the groove (111); the concave surface of the pressing sheet (142) is tightly attached to the shaft seal (13);
the second steel plate (12) is fixedly connected with the first steel plate (11), and the second steel plate (12) covers the groove (111).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921664071.6U CN210702603U (en) | 2019-09-30 | 2019-09-30 | Central electric spindle for numerical control machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921664071.6U CN210702603U (en) | 2019-09-30 | 2019-09-30 | Central electric spindle for numerical control machining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210702603U true CN210702603U (en) | 2020-06-09 |
Family
ID=70967365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921664071.6U Expired - Fee Related CN210702603U (en) | 2019-09-30 | 2019-09-30 | Central electric spindle for numerical control machining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210702603U (en) |
-
2019
- 2019-09-30 CN CN201921664071.6U patent/CN210702603U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200609 |