Motor
By designing two electromagnetically operated brakes and bearing structures in the motor, combined with the angle sensor, the problem of insufficient safety during motor operation is solved, stable and high-precision support and braking is achieved, reducing costs and increasing redundancy Braking capability.
Patent Information
- Application Number
- CN202323538708.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-25
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2033-12-25
AI Technical Summary
There is a problem of insufficient safety in operation of existing motors, especially in redundant braking solutions, which are difficult to achieve stable and high-precision support and braking.
A motor structure is designed, which includes two electromagnetically operated brakes, the first brake is mounted on the bearing cover, and the second brake is installed through a rigid and stable cover flange, combining the bearing and angle sensor to achieve stable support of the rotor shaft. and operate safely.
Through this design, the motor is stable, interference-free and safe operation is achieved, which reduces costs, while improving the rigidity and accuracy of the brakes, ensuring redundant braking operation and high load capacity.
Smart Images
Figure CN222215414U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a motor. Background Art
[0002] It is known that safer operation can be achieved by means of a redundant design of active components, such as motor brakes. Utility Model Content
[0003] Therefore, the purpose of the present invention is to improve the motor to achieve higher safety.
[0004] The important feature of the utility model in terms of the motor is that the motor has a rotor shaft supported in a rotatable manner, a first brake that can be electromagnetically operated, and a second brake that can be electromagnetically operated.
[0005] In particular, the two brakes are arranged in the electric machine in such a way that the friction torque generated by the respective brake is introduced into the rotor shaft of the electric machine.
[0006] The first brake is surrounded at least in the circumferential direction by a cover flange, which is fixed to a bearing cover of the motor.
[0007] The second brake is surrounded by a fan cover at least in the circumferential direction, and the fan cover is fixed on the cover flange.
[0008] The magnet of the first brake is connected to the bearing cover in a non-rotatable manner via a first connecting element, in particular a bolt.
[0009] In this case, the magnet of the second brake is connected to the cover flange in a rotationally fixed manner via a second connecting means, in particular a second bolt.
[0010] The advantage is that the first brake is mounted directly on the bearing cap, while the second brake is mounted via a rigid and stably designed cover flange. Although the second brake is spaced further from the bearing cap, a rigid and stable connection of the second brake is thereby achieved. As a result, stable, trouble-free and safe operation can be achieved.
[0011] In an advantageous embodiment, the first brake is implemented identically and / or identically structured as the second brake. This has the advantage that reliable and safe operation can be achieved at low cost.
[0012] In an advantageous embodiment, a bearing is received in the bearing cover, which is used to rotatably support the rotor shaft of the electric machine. The advantage is that the bearing cover enables stable support of the rotor shaft.
[0013] In an advantageous embodiment, the bearing cover is connected to the stator housing, which is connected on its side facing away from the bearing cover to a bearing flange, which receives a further bearing for rotatably supporting the rotor shaft of the electric machine. This has the advantage that a stable support can be achieved.
[0014] In an advantageous embodiment, the fan impeller, which is connected to the rotor shaft in a rotationally fixed manner, is also surrounded by the fan cover together with the second brake. This has the advantage that efficient operation can be achieved.
[0015] In an advantageous embodiment, the rotatable part of the angle sensor, in particular the hollow shaft, is connected in a rotationally fixed manner to the rotor shaft, in particular to an axial end region of the rotor shaft facing away from the stator housing.
[0016] The angle sensor is surrounded at least in the circumferential direction by a cover connected to the fan cover. This has the advantage that the rotational movement of the rotor shaft can be monitored and thus safe operation can be achieved.
[0017] In an advantageous embodiment, the cover flange is aligned relative to the bearing cover by means of a centering element.
[0018] In particular, the cover flange has a centering flange which is mounted on a centering edge formed on the bearing cover, in particular on the radial outer periphery of the bearing cover. The advantage is that the orientation and centering of the second brake can be achieved with high precision.
[0019] In an advantageous embodiment, the centering elements are spaced apart from one another in the circumferential direction and each centering element has at least three surface areas which are formed on the radial outer circumference of the bearing cap, are adjacent to one another, are flat, in particular are planar, are ground, in particular are lapped and / or are finely ground, and which bear against three corresponding inner surface areas of the cover flange which are adjacent to one another, are flat, in particular are planar, are ground, in particular are lapped and / or are finely ground. This has the advantage that, when the cover flange is mounted on the bearing cap, a highly precise alignment can be achieved in a simple manner by means of two or more such surface structure groups.
[0020] In an advantageous embodiment, the cover flange has an annular region.
[0021] The annular region is connected to the annular base region of the cover flange via a first web and a second web, which extend radially and axially. This has the advantage that the annular region is stably held.
[0022] In an advantageous embodiment, the distance between the bearing cap and the corresponding web decreases, in particular decreases monotonically, with increasing radial distance. This has the advantage that a high load capacity can be achieved.
[0023] In an advantageous embodiment, the first web and the second web are spaced apart from each other in the circumferential direction.
[0024] The second web extends further in the axial direction than the first web.
[0025] In this case, both the first web and the second web open radially outward into the inner wall of the cover flange. This has the advantage that the annular region is held rigidly.
[0026] In an advantageous embodiment, the smallest wall thickness, in particular the radial wall thickness, in particular the smallest radial wall thickness, of the cover flange is greater than the largest wall thickness, in particular the largest radial wall thickness, of the fan guard. This has the advantage that the cover flange is stably and thus rigidly designed and the second brake is thus precisely oriented.
[0027] In an advantageous design, the second brake is spaced apart from the first brake in the axial direction. This has the advantage that redundant braking operation is achieved.
[0028] In an advantageous embodiment, the cover flange is a machined metal casting.
[0029] The fan cover is a sheet metal part or a plastic injection molded part. Its advantage is that it can absorb the corresponding mechanical force.
[0030] In an advantageous embodiment, a first annular carrier element with external teeth is mounted on the rotor shaft and is connected to the rotor shaft in a rotationally fixed manner, in particular by means of a key connection.
[0031] The first brake pad carrier in the form of an annular plate is mounted on the first driving member and its inner teeth are engaged with the outer teeth of the first driving member, so that the first brake pad carrier can move axially and is connected to the first driving member in a non-rotatable manner.
[0032] The ferromagnetic first armature plate is axially arranged between the first magnet and the first brake pad carrier.
[0033] An annular recess is formed in the first magnet, and a first coil that can be energized is embedded in the annular recess, and the ring axis of the annular recess is coaxial with the rotation axis of the first rotor shaft.
[0034] The first armature plate is connected to the first magnet in a non-rotatable manner and can move axially, in particular by passing a first bolt pressed into a hole of the first magnet through an opening of the first armature plate.
[0035] wherein a first spring element supported on the first magnet presses on the first armature plate,
[0036] In particular, when the first coil is not energized, the first armature plate is pressed onto the first brake pad carrier by the first spring element, and the first brake pad carrier is thereby pressed onto the braking surface formed on the bearing cover, and when the first coil is energized, the first armature plate is attracted toward the first magnet against the spring force generated by the first spring element.
[0037] In an advantageous embodiment, an annular second carrier with external teeth is mounted on the rotor shaft and is connected to the rotor shaft in a rotationally fixed manner, in particular by means of a key connection.
[0038] The annular second brake pad carrier is mounted on the second carrier and its inner teeth are engaged with the outer teeth of the second carrier, so that the second brake pad carrier can move axially and is connected to the second carrier in a non-rotatable manner.
[0039] The ferromagnetic second armature plate is axially arranged between the second magnet and the second brake pad carrier.
[0040] wherein an annular recess is formed in the second magnet, a second coil which can be energized is embedded in the annular recess formed in the second magnet, and the ring axis of the annular recess formed in the second magnet is coaxial with the rotation axis of the rotor shaft,
[0041] The second armature plate is connected to the second magnet in a rotationally fixed manner and is axially movable, in particular by passing a second bolt pressed into a hole of the second magnet through an opening of the second armature plate.
[0042] The second spring element supported on the second magnet presses on the second armature plate.
[0043] In particular, when the second coil is not energized, the second armature plate is pressed onto the second brake pad carrier by the second spring element, and the second brake pad carrier is thus pressed onto the brake surface formed on the annular area of the cover flange, and when the second coil is energized, the second armature plate is attracted toward the second magnet against the spring force generated by the second spring element. This has the advantage that the brake is automatically activated when the power is off and thus safe operation can be achieved.
[0044] For a person skilled in the art, in particular by posing the technical problem and / or by comparing the technical problem with the prior art, further sensible combinations of features of the description and / or features of the drawings will emerge. BRIEF DESCRIPTION OF THE DRAWINGS
[0045] The utility model is now explained in detail with the aid of a schematic diagram:
[0046] Figure 1 It is an oblique view of the motor according to the utility model.
[0047] Figure 2 is a cross-sectional view of an area of a motor.
[0048] Figure 3 It is an oblique view of the cover flange 1.
[0049] List of reference numerals:
[0050] 1 Cover flange
[0051] 2 Junction Box
[0052] 3 Junction Box
[0053] 4 stator housing
[0054] 20 Bearing cap
[0055] 21 brake pad carrier
[0056] 22 driving parts
[0057] 23 armature
[0058] 24 Magnets
[0059] 25 Angle Sensor
[0060] 26 Fan impeller
[0061] 27 Magnets
[0062] 30 Opening for manual release lever in relation to assembly orientation
[0063] 31 First joint
[0064] 32 Ring Area
[0065] 33 Second joint DETAILED DESCRIPTION
[0066] As shown in the figure, the motor has a stator housing 4, which is connected to a bearing cover 20 at its first axial end and to a bearing flange at the other axial end of the stator housing. The bearing cover 20 receives a first bearing for a motor rotor shaft rotatably supported; the bearing flange receives a second bearing for a motor rotor shaft rotatably supported.
[0067] A first electromagnetically actuatable brake is arranged on the bearing cover 20 on its side axially facing away from the stator housing and is surrounded by a cover flange 1 on which a second electromagnetically actuatable brake is arranged on its side axially facing away from the stator housing.
[0068] The second electromagnetically actuatable brake is surrounded by a fan guard which also surrounds a fan impeller 26 which is connected to the rotor shaft in a rotationally fixed manner.
[0069] An angle sensor 25 is arranged at the end region of the rotor shaft facing away from the stator housing in the axial direction and serves to determine the angular position of the rotor shaft, wherein the angle sensor is surrounded by a further cap fastened to the fan guard.
[0070] The wall thickness of the cover flange 1 is greater than the wall thickness of the fan cover and the cover.
[0071] The fan wheel is placed onto the rotor shaft and is connected to it in a rotationally fixed manner, and the rotor shaft passes through both the first brake and the second brake, in particular in the axial direction.
[0072] The spatial region enclosed by the fan guard 2 includes not only the fan wheel but also at least a part of the surface of the second brake.
[0073] The area covered by the fan guard 2 in the axial direction includes an area covered by the second brake in the axial direction and an area covered by the fan impeller 24 in the axial direction.
[0074] The air flow sucked in by the fan wheel 26 flows through the cover cover grille of the cover cover and the fan guard grille of the fan guard 2 and is subsequently conveyed from the fan wheel 26 to the guard flange 1 and subsequently along the stator housing of the electric machine.
[0075] The first brake and the second brake are identical in structure to each other.
[0076] The first brake has a magnet 27 with an annular recess in which an energizable coil is inserted. The ring axis of the recess is coaxial with the rotation axis of the rotor shaft.
[0077] A carrier having external teeth and an annular shape is mounted on the rotor shaft and is connected to the rotor shaft in a rotationally fixed manner, in particular by means of a key connection.
[0078] The annular brake shoe carrier is sleeved onto the entraining member, wherein the inner teeth of the brake shoe carrier engage with the outer teeth of the entraining member. Therefore, the brake shoe carrier is connected to the rotor shaft in a non-rotatable manner and can move axially.
[0079] The armature plate is axially arranged between the magnet and the brake shoe carrier, is connected to the magnet in a rotationally fixed manner, and is arranged to be axially movable, in particular by passing a bolt fixed to the magnet through the armature plate in the axial direction.
[0080] The spring element supported on the magnet presses on the armature plate, so that when the coil is energized, the armature plate is attracted to the magnet against the spring force generated by the spring element. Conversely, when the coil is not energized, the spring element presses the armature plate onto the brake pad carrier, which is thus pressed onto the brake surface formed on the bearing cover 20. Therefore, the first brake automatically acts when the power is off.
[0081] Preferably, bolts connect the magnet to the bearing cover 20 .
[0082] The second brake has a second magnet 24 having an annular second recess, in which a second energizable coil is embedded. The ring axis of the second recess is coaxial with the rotation axis of the rotor shaft.
[0083] A second carrier 22 is mounted on the rotor shaft, the second carrier having second external teeth and being annular in shape. The second carrier 22 is connected to the rotor shaft in a rotationally fixed manner, in particular by means of a second spline connection.
[0084] The second brake shoe carrier of the ring plate shape is sleeved on the second driving member 22, wherein the second internal teeth of the second brake shoe carrier engage with the external teeth of the second driving member. Therefore, the second brake shoe carrier is connected to the rotor shaft in a non-rotatable manner and is arranged to be axially movable.
[0085] The second armature plate 23 is axially arranged between the second magnet 24 and the second brake pad carrier and is connected to the second magnet 24 in a non-rotatable manner and is arranged to be axially movable, in particular, by allowing a second bolt fixed to the second magnet 24 to pass through the second armature plate 23 in the axial direction.
[0086] The second spring element supported on the second magnet presses on the second armature piece 23, so that when the coil is energized, the second armature piece 23 is attracted to the second magnet 24 against the spring force generated by the second spring element. On the contrary, when the second coil is not energized, the second spring element presses the second armature piece 23 onto the second brake pad carrier, and the second brake pad carrier is thus pressed onto the second brake surface formed on the cover flange 1. Therefore, the second brake automatically acts when the power is off.
[0087] Preferably, a bolt connects the second magnet 24 to the cover flange 1 .
[0088] The friction heat of the second brake is therefore dissipated primarily via the cover flange 1 to the environment.
[0089] like Figure 3 As shown, the cover flange 1 comprises an annular region 32, on which the second brake surface of the second brake is formed. For this purpose, the annular region 32 is machined by grinding, in particular fine grinding.
[0090] The annular region 32 is held by first webs 31 and second webs 33 which extend radially outwards, wherein the distance between the bearing cover and the respective web 31 , 33 decreases, in particular monotonically, with increasing radial distance.
[0091] The webs 31 , 33 are spaced apart from one another in the circumferential direction.
[0092] The second web 33 extends further in the axial direction than the first web 31 .
[0093] Both the first web 31 and the second web 33 open radially outward into the inner wall of the cover flange 1 , ie into the annular base region of the cover flange 1 .
[0094] In addition, the cover flange 1 has radially through openings 30 on its outer circumference, and the openings are spaced apart from each other in the circumferential direction, so that the manual release lever can pass through the corresponding opening according to the installation direction.
[0095] The manual release lever is rotatably supported on the magnet of the first brake, so that the manual release lever can be swung between a first angle and a second angle. According to the rotation angle, in particular the swiveling angle, of the manual release lever, a rod hung on the manual release lever and extending through the through-cutout of the magnet can be axially moved. Here, the rod also passes through the armature plate and has a limiting mechanism, in particular a thickened portion or a corresponding fixing mechanism, on its end facing away from the magnet, so that the armature plate is axially limited by the limiting mechanism and the armature plate is moved in a manner that the brake is released by correspondingly moving the rod.
[0096] The annular region 32 forms an end region of the cap flange, ie in particular the cover of the cap.
[0097] A threaded hole is formed in the cover flange 1 adjacent to the annular region 32 , so that a bolt fastened to the magnet can be connected to the cover flange 1 .
[0098] The radial direction and the circumferential direction are based on the rotation axis of the rotor shaft. The axial direction is parallel to the direction of the rotation axis of the rotor shaft.
[0099] In other exemplary embodiments according to the present invention, the rotor shaft is designed in two parts or in multiple parts instead of the above-mentioned one-piece embodiment.
Claims
1. A motor, The electric machine comprises a rotatably mounted rotor shaft, a first electromagnetically actuable brake and a second electromagnetically actuable brake. The first brake and the second brake are arranged in the motor so that the friction torque generated by each brake is transmitted to the rotor shaft of the motor. It is characterized in that The first brake is surrounded at least in the circumferential direction by a cover flange, which is fixed to a bearing cover of the electric machine. The second brake is surrounded at least in the circumferential direction by a fan guard, which is fixed on a guard flange. The magnet of the first brake is connected to the bearing cover via a first connecting device in a non-rotatable manner. The magnet of the second brake is connected to the cover flange via the second connecting means in a rotationally fixed manner.
2. The motor according to claim 1, It is characterized in that The first brake is designed identically to the second brake.
3. The electric machine according to claim 1 or 2, It is characterized in that A bearing is accommodated in the bearing cover and serves to rotatably support a rotor shaft of the electric machine.
4. The motor according to claim 3, It is characterized in that The bearing cover is connected to the stator housing, which is connected on its side facing away from the bearing cover to a bearing flange which receives a further bearing for rotatably mounting a rotor shaft of the electric machine.
5. The electric machine according to claim 1 or 2, It is characterized in that The fan impeller, which is connected to the rotor shaft in a rotationally fixed manner, is also surrounded by the fan guard together with the second brake.
6. The electric machine according to claim 1 or 2, It is characterized in that The rotatable part of the angle sensor is connected in a rotationally fixed manner to the end region of the rotor shaft facing away from the stator housing in the axial direction. The angle sensor is surrounded at least in the circumferential direction by a cover which is connected to the fan guard.
7. The electric machine according to claim 1 or 2, It is characterized in that The cover flange is aligned relative to the bearing cap using the centering element. The cover flange has a centering collar which is placed onto a centering edge formed on the bearing cover.
8. The electric machine according to claim 7, It is characterized in that The centering parts are spaced apart from each other in the circumferential direction and each centering part has at least three surface areas, which are formed on the radial outer periphery of the bearing cover, are adjacent to each other, are flat and are ground, and are in contact with corresponding three inner surface areas of the cover flange, which are adjacent to each other, are flat and are ground.
9. The electric machine according to claim 1 or 2, It is characterized in that The hood flange has an annular area, The annular region is connected to the annular base region of the cover flange via a first web and a second web which extend in the radial direction and in the axial direction.
10. The electric machine according to claim 9, It is characterized in that The distance between the bearing cap and the webs decreases with increasing radial distance.
11. The electric machine according to claim 9, It is characterized in that The first web and the second web are spaced apart from each other in a circumferential direction, The second tab extends further in the axial direction than the first tab, Both the first web and the second web open radially outward into the inner wall of the cover flange.
12. The electric machine according to claim 1 or 2, It is characterized in that The minimum radial wall thickness of the cover flange is greater than the maximum radial wall thickness of the fan cover.
13. The electric machine according to claim 1 or 2, It is characterized in that The second brake is axially spaced from the first brake.
14. The electric machine according to claim 1 or 2, It is characterized in that The cover flange is a machined metal casting. The fan cover is a sheet metal part or a plastic injection molded part.
15. The electric machine according to claim 1 or 2, It is characterized in that An annular first carrier with external teeth is mounted on the rotor shaft and is connected to the rotor shaft in a non-rotatable manner. The first brake pad carrier in the form of an annular plate is mounted on the first driving member and its inner teeth are engaged with the outer teeth of the first driving member, so that the first brake pad carrier can move axially and is connected to the first driving member in a non-rotatable manner. The ferromagnetic first armature plate is arranged axially between the first magnet and the first brake pad carrier. An annular recess is formed in the first magnet, a first coil capable of being energized is embedded in the annular recess, and the ring axis of the annular recess is coaxial with the rotation axis of the first rotor shaft. The first armature plate is connected to the first magnet in a non-rotatable manner and is axially movable, wherein the first bolt pressed into the hole of the first magnet passes through the opening of the first armature plate, A first spring element, which is supported on the first magnet, presses against the first armature plate.
16. The electric machine according to claim 1 or 2, It is characterized in that An annular second carrier with external teeth is mounted on the rotor shaft and is connected to the rotor shaft in a non-rotatable manner. The annular second brake pad carrier is mounted on the second driving member and its inner teeth are engaged with the outer teeth of the second driving member, so that the second brake pad carrier can move axially and is connected to the second driving member in a non-rotatable manner. The ferromagnetic second armature plate is axially arranged between the second magnet and the second brake pad carrier. An annular recess is formed in the second magnet, a second coil capable of being energized is embedded in the annular recess formed in the second magnet, and the ring axis of the annular recess formed in the second magnet is coaxial with the rotation axis of the rotor shaft. The second armature plate is connected to the second magnet in a non-rotatable manner and is axially movable, wherein the second bolt pressed into the hole of the second magnet passes through the opening of the second armature plate, A second spring element supported on the second magnet presses against the second armature plate.