CN216216313U - Electric machine - Google Patents
Electric machine Download PDFInfo
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- CN216216313U CN216216313U CN202122550567.4U CN202122550567U CN216216313U CN 216216313 U CN216216313 U CN 216216313U CN 202122550567 U CN202122550567 U CN 202122550567U CN 216216313 U CN216216313 U CN 216216313U
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- bearing
- electric machine
- rotor shaft
- flange
- housing
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Abstract
The utility model relates to an electric machine having a rotor shaft and a housing with a stator housing part, wherein the rotor shaft is rotatably supported by a first bearing and a second bearing, wherein the first bearing is received in the housing and the second bearing is received in the housing, wherein the rotor shaft is inserted into and/or passes through a disc, wherein the disc is detachably connected to the housing and the rotor shaft.
Description
Technical Field
The utility model relates to an electric machine having a rotor shaft and a housing with a stator housing part.
Background
It is known that the rotor shaft loads the bearing arrangement when the motor is in motion.
SUMMERY OF THE UTILITY MODEL
The object of the utility model is therefore to improve an electric machine, wherein the safety is to be increased.
According to the utility model, this object is achieved by an electric machine according to the features of the utility model.
An important feature of the utility model is that the electric machine has a rotor shaft and a housing with a stator housing part, wherein the rotor shaft is rotatably supported by a first bearing and a second bearing, wherein the first bearing is received in the housing and the second bearing is received in the housing, wherein the rotor shaft is inserted into and/or passes through a disc, wherein the disc is detachably connected to the housing and the rotor shaft, in particular wherein the rotor shaft is connected to the housing in a rotationally fixed manner.
The advantage here is that the safety is increased. Since, by the fixing of the rotor shaft, overloading of the bearing, for example due to too large transverse and/or axial forces, can be prevented. Since according to the utility model transverse and axial forces can be transmitted via the disk to the housing, in particular to the cover of the housing, and from there to the bearing flange, the forces are transmitted from the bearing flange to the stator housing.
In one advantageous embodiment, the first bearing is designed as a floating bearing, while the second bearing is designed as a fixed bearing. The advantage here is that the disk can be arranged closer to the floating bearing than the fixed bearing, and thus forces are directed away from the floating bearing and out through the disk.
In an advantageous embodiment, the disk is made of plastic, in particular as a plastic injection-molded part. The advantage here is that the damping properties of the plastic, i.e. in particular the vibration-absorbing properties, protect the bearing structure better.
In an advantageous embodiment, the housing has a first bearing flange, in which the first bearing is received and which is connected to the stator housing part, in particular by means of screws, in particular wherein the housing has a second bearing flange, in which the second bearing is received and which is connected to the stator housing part, in particular by means of screws. The advantage here is that the respective bearing is received in the housing.
In an advantageous embodiment, the cover, in particular on the side of the first bearing flange facing axially away from the second bearing, is connected to the bearing flange, in particular by means of screws. The advantage here is that the first bearing is protected towards the environment by the cover and the shaft seal can be received in the cover, so that the first bearing can be protected completely from dirt and dust.
In an advantageous embodiment, a shaft seal is received in the cover, which shaft seal seals against the rotor shaft. The advantage here is that the first bearing is arranged to be completely protected.
In an advantageous embodiment, a screw guided through, in particular screwed through, the radial bore of the disk is pressed onto a key received in a key groove of the rotor shaft. The advantage here is that the rotor shaft is protected from damage and the key provides a tangentially oriented surface area for pressing the bolt.
In an advantageous embodiment, at least one further screw bolt, which extends through the axial bore of the disk, is screwed into a threaded bore, in particular an axial bore, of the cover. The advantage here is that the screw pulls the disk with its screw head toward the cover, so that the disk can bear against the shaft step, in particular the collar. In this way, the rotor shaft is then pressed against the second bearing.
In an advantageous embodiment, the bolt head of the further bolt presses against the disk, in particular on the side of the disk facing away from the cover, in particular on the side of the flange region of the disk facing away from the cover. The advantage here is that the disk presses the rotor shaft against the second bearing and thus unloads the first bearing.
In an advantageous embodiment, the disk abuts against a collar, in particular a shaft step, of the rotor shaft. The advantage here is that the rotor shaft is pressed against the second bearing and the derivation of transverse and other forces is possible.
In one advantageous embodiment, the disk has a base body and a flange region, wherein the base body is hollow-cylindrical and the flange region is likewise hollow-cylindrical, wherein the flange region is oriented coaxially to the base body, wherein the outer diameter of the flange region is greater than the outer diameter of the base body, wherein the radial bore is formed through the base body, wherein the axial bore is formed through the flange region. The advantage here is that simple production is possible.
In an advantageous embodiment, one or more nuts, in particular nuts acting as locking nuts, are screwed onto the further screw in such a way that an axially minimum spacing between the cover and the disk is ensured. The advantage here is that long operating times are achieved with undisturbed components.
In an advantageous embodiment, the cover is centered on the bearing flange by means of a centering ring formed on the cover. The advantage here is that the cover can be aligned on the bearing flange without play and precisely.
In an advantageous embodiment, a sensor for detecting the angular position of the rotor shaft is arranged on the side of the second bearing facing away from the first bearing, in particular axially. The advantage here is that, due to the proximity of the floating bearing, the measurement accuracy is very high and the sensor is only slightly loaded with axial movements.
In an advantageous embodiment, the region covered by the fan guard connected to the housing in the axial direction comprises the region covered by the sensor in the axial direction, in particular wherein the fan guard forms a housing for the sensor. The advantage here is that the sensor is arranged in a protected and thus safe manner.
In an advantageous embodiment, the bearing flange, the cover and the rotor shaft are each made of metal, in particular of steel or cast steel. The advantage here is that, by means of the disk, structure-borne sound vibrations or vibrations which are transmitted through the metallic and therefore rigid part can be suppressed by means of the disk made of plastic.
The utility model is not limited to the combination of features described above. Other possibilities of reasonable combinations of the features of the description and/or of the figures can be obtained for a person skilled in the art, in particular from the objects set forth and/or by comparison with the prior art.
Drawings
The utility model will now be described in detail with reference to the schematic drawings:
fig. 1 shows a longitudinal section through the region of the electric machine according to the utility model with the disk 8 acting as a transport safety device.
Fig. 2 shows an oblique view of the electric machine.
The disc 8 is shown in an oblique view in fig. 3.
List of reference numerals:
1 bearing flange
2 first bearing
3 bolt
4 bolt
5 nut
6 bond
7 rotor shaft
8 disc-shaped part
9 shaft seal ring
10 cover
20 blower fan cover
30 radial holes
31 axial hole
Detailed Description
As shown in the drawing, the electric motor has a rotor shaft 7 which is rotatably supported.
The stator housing of the electrical machine receives the stator lamination stack together with the stator windings and is connected to a bearing flange 1, in which a first bearing 2 is received, which is designed as a floating bearing, i.e. is arranged with a gap, in particular in the axial direction.
The passage opening in the bearing flange 1, which receives the first bearing 2, is covered towards the outside environment by a cover 10, which is connected to the bearing flange 1 and receives a shaft sealing ring 9, which seals towards the rotor shaft 7, in particular in that the sealing lip of the shaft sealing ring is moved over the precisely machined sealing surface of the rotor shaft 7.
The other bearing of the rotor shaft 7 is received in the other flange part, in particular arranged on the B-side. The further bearing is designed as a fixed bearing, so that an angle sensor can be arranged there, in particular due to a small gap. Axially next to the angle sensor, a fan is arranged, which is surrounded by a fan guard 20.
The inner ring of the first bearing 2, i.e. the floating bearing, is slipped onto the rotor shaft 7, while the outer ring of the first bearing 2 is received in the cylindrical bore of the bearing flange 1. The clear inner diameter of the bore is thus larger than the outer diameter of the rotor shaft 7. The cover 10 is therefore slipped onto the shaft, so that only a narrow annular gap exists between the rotor shaft 7 and the cover 10.
The cover 10 has a centering collar with which it is centered at the edge of the hole in the bearing flange 1. Thus, the cover 10 covers the hole.
A shaft seal ring, the sealing lip of which is moved over the sealing surface of the rotor shaft 7 and thus seals against the shaft, is received in the cover 10.
In the axial end region of the rotor shaft 7, which passes through the cover 10, an axially extending key groove is formed, into which a key 6 is inserted, which protrudes radially from the rotor shaft 7.
Preferably, the key 6 has a surface area oriented tangentially with respect to the axis of rotation of the rotor shaft 7.
The rotor shaft 7 is made of steel.
As a transport safety device, the disc 8 is fitted onto the rotor shaft 7. For this purpose, the disc 8 has a hole centrally formed therein.
The disc 8 is preferably made of plastic.
The screw 4 is guided through a radial bore 30 through the disk 8 and pressed onto the surface area, i.e. in particular the key.
The other screw 3 is guided through an axial bore 31 of the disc 8 and screwed into an axially oriented bore of the cover 10. The axial restraint and fixing of the disk 8 can be achieved by means of a nut 5, in particular a union nut. By means of a second nut, which is also screwed onto the bolt 3, axial restraint and fixing of the cover 10 can be achieved.
The nut is preferably used as a lock nut.
The head of the bolt presses the disk 8 against the cover 10 on its side facing away from the cover 10, as a result of which the disk 8 bears against the shaft step of the rotor shaft 7 and thus the rotor shaft is pressed against a fixed bearing which is arranged on the side of the first bearing 2 facing axially away from the cover 10. Thereby, the rotor shaft 7 is fixed, in particular, without play, in the axial direction toward the fixed bearing.
The shaft is also fixed in the radial direction by means of bolts 4 which are guided through radial holes 30 of the disc 8 and which press in the radial direction onto the keys of the rotor shaft 7. Since the disk 8 is connected to the cover 10 by means of the further screw 3, which is guided through the axial bore of the disk 8, the cover is connected to the bearing flange 1, which is connected to the stator housing, by means of the screw. Thus, the rotor shaft 7 is also fixed in the radial direction.
The disk 8 has a hollow-cylindrical base body, wherein an axial groove is provided on the inner circumference of the base body, into which the key 6 projects.
The radial bores 30 are formed through the base body and can also be embodied as threaded bores. Alternatively or additionally, the nut is arranged and/or connected in a material-locking manner in a depression on the outer circumference of the base body, so that the screw 4 is supported on the thread of the nut and/or of the threaded bore and is pressed against the key 6 in this case.
A radially protruding flange region is fitted on the axial end region of the base body, in particular, this flange region is likewise of hollow cylindrical design. The flange region is formed integrally, i.e. in one piece, with the base body, in particular as a plastic injection-molded part.
The outer diameter of the flange region is greater than the outer diameter of the base. The axial bores 31 are configured through the flange region, in particular wherein the axial bores 31 are spaced apart, in particular evenly spaced apart, from one another in the circumferential direction.
In other embodiments according to the utility model, the bolt 4 is not pressed onto the key 6, but directly onto the rotor shaft 7.
Claims (15)
1. An electric machine with a rotor shaft and a housing comprising a stator housing part,
wherein the rotor shaft is rotatably supported by a first bearing and a second bearing,
wherein the first bearing is received in the housing, the second bearing is received in the housing,
it is characterized in that the preparation method is characterized in that,
the rotor shaft is inserted into and/or through the disc,
wherein the disc-shaped member is detachably connected with the housing and the rotor shaft,
wherein the rotor shaft is connected to the housing in a rotationally fixed manner.
2. The electric machine of claim 1, wherein the first bearing is configured as a floating bearing and the second bearing is configured as a fixed bearing.
3. An electric machine as claimed in claim 1 or 2, characterized in that the disc is made of plastic.
4. An electric machine as claimed in claim 1 or 2, characterized in that the housing has a first bearing flange in which the first bearing is received, which first bearing flange is connected to the stator housing part, wherein the housing has a second bearing flange in which the second bearing is received and which second bearing flange is connected to the stator housing part.
5. An electric machine as claimed in claim 4, characterized in that a cover on the side of the first bearing flange facing axially away from the second bearing is connected to the first bearing flange.
6. An electric machine as claimed in claim 5, characterized in that a shaft sealing ring is received in the cover, which shaft sealing ring seals against the rotor shaft.
7. An electric machine as claimed in claim 5, characterized in that the bolts guided through the radial holes of the disc are pressed onto keys received in keyways of the rotor shaft.
8. An electric machine as claimed in claim 7, characterized in that at least one further bolt extending through the axial hole of the disc is screwed into the threaded hole of the cover.
9. An electric machine as claimed in claim 8, characterized in that the bolt head of the further bolt presses against the disc.
10. An electric machine as claimed in claim 1 or 2, characterized in that the disc abuts against a collar of the rotor shaft.
11. The electric machine according to claim 8, wherein the disc has a base body and a flange region, wherein the base body is hollow-cylindrical and the flange region is likewise hollow-cylindrical, wherein the flange region is oriented coaxially with the base body, wherein an outer diameter of the flange region is greater than an outer diameter of the base body, wherein the radial bore is configured to extend through the base body, and wherein the axial bore is configured to extend through the flange region.
12. An electric machine as claimed in claim 8, characterized in that one or more nuts are screwed onto the further bolts in such a way that an axially minimum spacing between the cover and the disc is ensured.
13. An electric machine as claimed in claim 5, characterized in that the cover is centered on the first bearing flange by means of a centering ring formed on the cover, and/or
A sensor for detecting the angular position of the rotor shaft is arranged on the side of the second bearing facing away from the first bearing.
14. The electric machine of claim 13, wherein an area covered in an axial direction by a fan guard coupled to the housing comprises an area covered in an axial direction by the sensor, wherein the fan guard forms a housing for the sensor.
15. The electric machine of claim 5 wherein the first bearing flange, the second bearing flange, the cover, and the rotor shaft are each made of metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122550567.4U CN216216313U (en) | 2021-10-22 | 2021-10-22 | Electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122550567.4U CN216216313U (en) | 2021-10-22 | 2021-10-22 | Electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216216313U true CN216216313U (en) | 2022-04-05 |
Family
ID=80887430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122550567.4U Active CN216216313U (en) | 2021-10-22 | 2021-10-22 | Electric machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216216313U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022128564A1 (en) | 2022-10-27 | 2024-05-02 | Minebea Mitsumi Inc. | Motor device and motor |
-
2021
- 2021-10-22 CN CN202122550567.4U patent/CN216216313U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022128564A1 (en) | 2022-10-27 | 2024-05-02 | Minebea Mitsumi Inc. | Motor device and motor |
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