CN211145085U - Split type cast aluminum shaft - Google Patents
Split type cast aluminum shaft Download PDFInfo
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- CN211145085U CN211145085U CN201922026274.9U CN201922026274U CN211145085U CN 211145085 U CN211145085 U CN 211145085U CN 201922026274 U CN201922026274 U CN 201922026274U CN 211145085 U CN211145085 U CN 211145085U
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- mandrel
- annular fan
- pressing shaft
- shaft
- hole
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Abstract
The utility model relates to the technical field of motor production, in particular to a split type cast aluminum shaft, which comprises a mandrel, a pressing shaft and a compression screw; a blind hole is formed in the center of one end of the mandrel, a threaded hole is formed in the center of the bottom of the blind hole, two 90-degree annular fan-shaped bosses of the mandrel are arranged on the periphery of the blind hole, and the annular fan-shaped bosses of the mandrel are arranged oppositely; a through hole is formed in the center of the pressing shaft, two 90-degree pressing shaft annular fan-shaped bosses are arranged on the periphery of the through hole at one end of the pressing shaft, and the pressing shaft annular fan-shaped bosses are arranged oppositely; the two 90-degree mandrel annular fan-shaped bosses are inserted into the 90-degree groove between the two pressing shaft annular fan-shaped bosses, and the compression screw penetrates through the through hole of the pressing shaft and is connected with the threaded hole at one end of the mandrel. The mounting is convenient, and the connection is firm and reliable.
Description
Technical Field
The utility model relates to a motor production technical field, concretely relates to split type cast aluminium axle.
Background
The motor rotor is formed by laminating rotor punching sheets on a cast aluminum shaft, placing the cast aluminum shaft into a cast aluminum die, injecting aluminum water, cooling and solidifying the cast aluminum die into a whole, and the part is named as a shaftless rotor. Among them is a shaftless rotor of electric spindle motor, which is characterized by that its torque is very large, so that its rotating shaft must be thickened more than that of same machine seat motor, on the original basis, it is thickened more than 1/2, so that it must make the shaft hole be very large, and the distance between end ring of rotor and shaft hole be very small, if the distance between shaft hole of rotor and end ring is only 0.5 mm. In general, a shaft with a stage is designed in an aluminum casting process, punching sheets are arranged on the shaft, and the punching sheets are compressed by using washers and nuts. The inner sprue is also a punching sheet pressed in the inner part of the end ring, a plurality of channels are formed in the inner sprue, and molten aluminum enters the rotor groove and the end ring cavity designed by the mold from the channels, so that the shaftless rotor is manufactured and processed. The process has the problem that when aluminum is cast, a rotor punching sheet is overlapped on an aluminum casting shaft and a gate in an aluminum casting mold cannot be pressed on the punching sheet. Aiming at the problem, a cast aluminum shaft with a brand new structure is designed.
Disclosure of Invention
In view of the defects of the prior art, the utility model aims at providing a split type cast aluminum shaft, which is convenient for mounting, and has firm and reliable connection.
In order to achieve the purpose, the technical scheme provided by the utility model is a split type cast aluminum shaft, which comprises a mandrel, a pressing shaft and a compression screw; a blind hole is formed in the center of one end of the mandrel, a threaded hole is formed in the center of the bottom of the blind hole, two 90-degree annular fan-shaped bosses of the mandrel are arranged on the periphery of the blind hole, and the annular fan-shaped bosses of the mandrel are arranged oppositely; a through hole is formed in the center of the pressing shaft, two 90-degree pressing shaft annular fan-shaped bosses are arranged on the periphery of the through hole at one end of the pressing shaft, and the pressing shaft annular fan-shaped bosses are arranged oppositely; the two 90-degree mandrel annular fan-shaped bosses are inserted into the 90-degree groove between the two pressing shaft annular fan-shaped bosses, and the compression screw penetrates through the through hole of the pressing shaft and is connected with the threaded hole at one end of the mandrel.
Based on the technical scheme, the mandrel and the pressing shaft are respectively provided with two 90-degree grooves and two 90-degree bosses from the center to the excircle, so that the mandrel and the pressing shaft are assembled together to form a whole circle.
Furthermore, the height of the annular fan-shaped boss of the mandrel is equal to that of the annular fan-shaped boss of the pressing shaft.
Furthermore, the height of the annular fan-shaped boss of the mandrel and the annular fan-shaped boss of the pressing shaft is 25 mm.
Furthermore, the excircle of the annular fan-shaped boss of the mandrel and the excircle of the annular fan-shaped boss of the pressing shaft are both provided with an oblique angle of 5mm and 10 degrees.
Further, the other end of the mandrel is provided with a 4-degree drawing angle.
Further, the other end of the pressing shaft is provided with a 4-degree drawing angle.
Preferably, the depth of the blind hole is 25 mm.
Preferably, the depth of the through hole is 45 mm.
To the further explanation of the utility model:
the utility model discloses a cast aluminium axle is split type, but coupling part should be the plug-in type, makes coupling part's axle still whole circle like this to prevent that aluminium liquid from getting into the shaft hole. The split type cast aluminum shafts are connected together, and are provided with the positioning structures and the pressing devices, so that the split type shafts can be firmly connected together. Use the utility model discloses a cast aluminium axle not only the mounting is convenient, has the convenient characteristic of axle again that moves back.
Adopt the utility model discloses carry out the method of mounting: and respectively installing a punching sheet on the mandrel and the pressing shaft, inserting the pressing shaft into the mandrel, and screwing the compression screw rod to complete the lamination process of the rotor punching sheets.
The utility model has the advantages that: the mounting is convenient, and the connection is firm and reliable.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the mandrel of the present invention;
fig. 3 is a side view of the mandrel of the present invention;
FIG. 4 is a schematic structural view of the pressing shaft of the present invention;
fig. 5 is a side view of the pressing shaft of the present invention;
fig. 6 is a schematic structural view of the pressing screw rod of the present invention;
fig. 7 is a side view of the pressing screw of the present invention;
in the figure: 1. the mandrel comprises a mandrel body 2, a pressing shaft 3, a pressing screw rod 4, a blind hole 5, a threaded hole 6, a mandrel annular fan-shaped boss 7, a through hole 8 and a pressing shaft annular fan-shaped boss.
Detailed Description
The structure of the present invention will be further explained with reference to the drawings.
A split type cast aluminum shaft comprises a mandrel 1, a pressing shaft 2 and a compression screw 3; a blind hole 4 is formed in the center of one end of the mandrel 1, a threaded hole 5 is formed in the center of the bottom of the blind hole 4, two 90-degree mandrel annular fan-shaped bosses 6 are arranged on the periphery of the blind hole 4, and the mandrel annular fan-shaped bosses 6 are arranged oppositely; a through hole 7 is formed in the center of the pressing shaft 2, two 90-degree pressing shaft annular fan-shaped bosses 8 are arranged on the periphery of the through hole 7 at one end of the pressing shaft 2, and the pressing shaft annular fan-shaped bosses 8 are arranged oppositely; two 90-degree mandrel annular fan-shaped bosses 6 are inserted into 90-degree grooves between two pressing shaft annular fan-shaped bosses 8, and the compression screw 3 penetrates through a through hole 7 of the pressing shaft 2 and is connected with a threaded hole 5 at one end of the mandrel 1.
Further, the height of the mandrel annular fan-shaped boss 6 is equal to that of the pressing shaft annular fan-shaped boss 8.
Further, the height of the mandrel annular fan-shaped boss 6 and the height of the pressing shaft annular fan-shaped boss 8 are 25 mm.
Furthermore, the excircle positions of the annular fan-shaped boss 6 of the mandrel and the annular fan-shaped boss 8 of the pressing shaft are both provided with oblique angles of 5mm and 10 degrees.
Further, the other end of the mandrel 1 is provided with a 4-degree drawing angle.
Further, the other end of the pressing shaft 2 is provided with a 4-degree drawing angle.
Preferably, the depth of the blind hole 4 is 25 mm.
Preferably, the depth of the through hole 7 is 45 mm.
For further explanation of the present example:
fig. 1 is a split type cast aluminum shaft used when an electric spindle motor rotor is cast with aluminum, which is composed of three parts, namely a core shaft, a pressing shaft and a compression screw, the height of a rotor core is equal to the dimension between two steps (identified as L in fig. 1) of the assembled cast aluminum shaft.
The split cast aluminum shaft of the embodiment is already designed to be part of the moving and static mold (or the upper mold and the lower mold), because the distance between the shaft hole and the inner diameter of the end ring is only 0.5mm, as can be seen from fig. 1 to 7, the bench level at the two ends is matched with the size of the end ring to form a 4-degree die shifting angle, and the thickness is designed to be 5mm, so that the cast aluminum shaft has certain strength to press the rotor punching sheet, and the strength of the moving and static mold (or the upper mold and the lower mold) is not influenced.
In order to correctly assemble the core shaft and the pressing shaft together, the split cast aluminum shaft of the embodiment is provided with two grooves with the height of 25mm from the center to the outer circle by 90 degrees respectively as seen in fig. 2 and 3, so that the assembly together is a complete circle. When the rotor punching sheets are preassembled, only one punching sheet is respectively arranged on the core shaft and the pressing shaft, then the pressing shaft is inserted into the core shaft, and the four pressing screw rods in the drawing are screwed down to complete the rotor punching sheet stacking process.
As shown in figures 6-7, the clearance between the positioning part and the matching part of the pressing shaft is designed to be 0.1-0.2 mm, and the pressing screw penetrates through the pressing shaft, is screwed into the threaded hole of the mandrel and is screwed tightly to press, so that the pressing screw is very convenient to mount and dismount.
As shown in figures 2-4, the outer circles of the two bosses with 90 degrees are designed with slopes with the length of 5mm and the angle of 10 degrees, so that the lamination of punching sheets is facilitated on one hand, and the pressing shaft can be inserted into the mandrel on the other hand.
As shown in figures 1 and 2, the hole for matching the pressing shaft with the pressing screw rod is larger, the pressing screw rod is detached after the hole is subjected to aluminum casting, the mandrel, the pressing shaft and the rotor are firmly matched together, the mandrel is propped against the mandrel through the hole by the ejector rod, the mandrel is withdrawn under the action of the shaft withdrawing machine, and the pressing shaft is withdrawn by the ejector rod which is larger than the pressing shaft.
The electric spindle motor rotor core cast by the cast aluminum shaft completely meets the process requirements, is very convenient to use, and solves the problem that the distance between the shaft hole and the end ring is very small.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. The utility model provides a split type cast aluminum axle which characterized in that: comprises a mandrel, a pressing shaft and a pressing screw rod; a blind hole is formed in the center of one end of the mandrel, a threaded hole is formed in the center of the bottom of the blind hole, two 90-degree annular fan-shaped bosses of the mandrel are arranged on the periphery of the blind hole, and the annular fan-shaped bosses of the mandrel are arranged oppositely; a through hole is formed in the center of the pressing shaft, two 90-degree pressing shaft annular fan-shaped bosses are arranged on the periphery of the through hole at one end of the pressing shaft, and the pressing shaft annular fan-shaped bosses are arranged oppositely; the two 90-degree mandrel annular fan-shaped bosses are inserted into the 90-degree groove between the two pressing shaft annular fan-shaped bosses, and the compression screw penetrates through the through hole of the pressing shaft and is connected with the threaded hole at one end of the mandrel.
2. The split cast aluminum shaft according to claim 1, wherein: the annular fan-shaped boss of the mandrel and the annular fan-shaped boss of the pressing shaft are equal in height.
3. The split cast aluminum shaft according to claim 2, wherein: the height of the annular fan-shaped boss of the mandrel and the annular fan-shaped boss of the pressing shaft is 25 mm.
4. The split cast aluminum shaft according to claim 1, wherein: the excircle of the annular fan-shaped boss of the mandrel and the excircle of the annular fan-shaped boss of the pressing shaft are both provided with oblique angles of 5mm and 10 degrees.
5. The split cast aluminum shaft according to claim 1, wherein: and the other end of the mandrel is provided with a 4-degree drawing angle.
6. The split cast aluminum shaft according to claim 1, wherein: and the other end of the pressing shaft is provided with a 4-degree drawing angle.
7. The split cast aluminum shaft according to claim 1, wherein: the depth of the blind hole is 25 mm.
8. The split cast aluminum shaft according to claim 1, wherein: the depth of the through hole is 45 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922026274.9U CN211145085U (en) | 2019-11-21 | 2019-11-21 | Split type cast aluminum shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922026274.9U CN211145085U (en) | 2019-11-21 | 2019-11-21 | Split type cast aluminum shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211145085U true CN211145085U (en) | 2020-07-31 |
Family
ID=71773748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922026274.9U Active CN211145085U (en) | 2019-11-21 | 2019-11-21 | Split type cast aluminum shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211145085U (en) |
-
2019
- 2019-11-21 CN CN201922026274.9U patent/CN211145085U/en active Active
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