Motor

Abstract

The utility model relates to a motor, which is provided with a stator shell, one side of the stator shell is connected with an end cover of the motor, the end cover is used for accommodating one bearing of a rotor shaft of the motor, the other side of the stator shell is connected with a bearing flange, and the bearing flange is used for accommodating the other bearing of the rotor shaft. A magnet of an electromagnetically actuatable brake of an electric machine is connected to an end cap in a rotationally fixed manner, and a cover cap surrounds the magnet in such a way as to form a housing and is pressed against the end cap via a sealing element arranged in the middle.

Description

Technical Field

[0001] The utility model relates to a motor. Background Art

[0002] As is known, electric machines can be designed with an integrated brake and thus an increase in safety can be achieved by the ability to brake the electric machine. Utility Model Content

[0003] Therefore, an object of the present invention is to improve a motor so as to enhance the safety of the motor.

[0004] In the motor, an important feature of the utility model is that the motor has a stator housing, which is connected to an end cover of the motor on one side, and the end cover receives a bearing of the rotor shaft of the motor, and the stator housing is connected to a bearing flange on the other side, and the bearing flange receives another bearing of the rotor shaft.

[0005] In this case, the magnet of the electromagnetically actuable brake of the motor is connected to the end cap in a rotationally fixed manner.

[0006] In particular, the magnet is arranged on a side of the end cover facing away from the stator housing in the axial direction,

[0007] In this case, the cover surrounds the magnet in a manner forming a housing, in particular in a watertight and / or airtight manner, and is pressed onto the end cover via a seal arranged in the middle, in particular a flat seal, in particular by the bolt heads of the bolts, in particular the threaded area of ​​the bolts being screwed into the threaded hole of the end cover.

[0008] The advantage here is that the cover surrounds the brake in a housing-forming manner and is sealedly connected to the end cap. In this way, the brake can be integrated in the motor with a high degree of protection.

[0009] In an advantageous design, at least one threaded element passes through the bearing flange, the stator housing and the end cap, the at least one threaded element being a long bolt, a bolt or a screw, the end cap being pressed against the stator housing by means of the threaded element head of the threaded element or a nut screwed onto the threaded element, and the bearing flange being pressed against the stator housing by means of the threaded element head of the threaded element or a nut screwed onto the threaded element. Advantageously, the threaded element holds the motor together and the first axial ends of the threaded element each extend into the inner space region surrounded by the cover. The sealing is ensured by arranging a sealing ring on the threaded element head or on the nut.

[0010] In an advantageous design, the sealing ring is inserted onto the threaded part and the sealing ring abuts against the end cap.

[0011] The threaded part head or the nut is pressed onto the end cap via the sealing ring. The advantage here is that a high protection level for the brake can be ensured.

[0012] In an advantageous embodiment, the cover has cylindrical shell sections adjoining one another in the circumferential direction. This has the advantage that an increased rigidity can be achieved. Also, a low vibration tendency and / or vibration capacity of the cover can be achieved. Thus, vibrations of the cover are damped and resonances are avoided.

[0013] In an advantageous embodiment, the areas covered by the cylindrical shell segments in the circumferential direction are of the same size. This has the advantage that simple production can be achieved.

[0014] In an advantageous embodiment, the cylinder axis of each cylindrical housing segment is parallel to the rotation axis of the rotor shaft of the electric machine and is spaced apart from the rotation axis of the rotor shaft of the electric machine. This has the advantage that the curvature of the cylindrical housing segment is smaller than if the radial outer circumference of the cover is designed as a continuous cylindrical housing.

[0015] In an advantageous embodiment, the radius of each cylindrical shell section is greater than half of the maximum outer diameter of the cover. This has the advantage that the curvature of the cylindrical shell section is more gradual than if the outer circumference of the cover were designed as a continuous cylinder. This allows water to flow out in essentially all installation directions, achieves high rigidity and dampens resonances.

[0016] In an advantageous embodiment, the radius of the cylindrical housing segments is respectively greater than the maximum radial distance of the cover with respect to the axis of rotation of the rotor shaft. This has the advantage that the curvature of the cylindrical housing segments is more gradual than if the outer circumference of the cover were designed as a continuous cylinder. This allows water to flow out in essentially all installation directions, achieves high rigidity and dampens resonances.

[0017] In an advantageous embodiment, the wall thickness of the cover is constant. This has the advantage that simple production can be achieved.

[0018] In an advantageous embodiment, the wall thickness of the cover is independent of the circumferential direction. This has the advantage that simple production can be achieved.

[0019] In an advantageous design, the threaded member extends from the end cap into the inner space region surrounded by the cover. Advantageously, the threaded member enables the connection of the motor, and the axial end region of the threaded member extends into the inner space region surrounded by the cover.

[0020] In an advantageous design, the screw passes through the magnet in the axial direction and extends out of the magnet on both sides in the axial direction.

[0021] In particular, the further magnet of the further brake can be fastened to a screw protruding from the magnet. This has the advantage that safety can be increased by providing the further brake. To this end, the rotor shaft must pass through at least one magnet of the brake arranged axially adjacent to the end cap.

[0022] In an advantageous embodiment, an annular driver with external toothing is placed on the rotor shaft and is connected to the rotor shaft in a rotationally fixed manner, in particular by means of a key connection.

[0023] The annular disc-shaped brake pad carrier is mounted on the driving member, and the inner tooth portion of the brake pad carrier meshes with the outer tooth portion of the driving member.

[0024] The brake pad carrier is connected to the driver in a rotationally fixed manner and is arranged in an axially movable manner toward the driver,

[0025] A coil capable of being energized is accommodated in the annular recess of the magnet.

[0026] The armature plate is arranged axially between the magnet and the brake pad carrier.

[0027] The armature piece is connected to the magnet in a non-rotatable manner.

[0028] The armature plate is arranged in an axially movable manner, in particular in that a pin, which is oriented in an axial direction and which passes through an opening of the armature plate, is pressed into a recess of the magnet.

[0029] The armature plate is arranged on the side of the brake pad carrier that is axially away from the end cover.

[0030] In this case, spring elements which are supported on the magnet and are spaced apart from one another in the circumferential direction press onto the armature plate.

[0031] Particularly wherein, on the end cap, be formed with brake surface. Advantage is here that, when power is off, brake automatically engages, and only when coil is energized, just releases brake.

[0032] In an advantageous design, when the coil is energized, the armature piece is attracted to the magnet against the spring force generated by the spring element. Advantageously, safety is improved because release can only be achieved when energized.

[0033] In an advantageous embodiment, when the coil is not energized, the armature plate is pressed by the spring element onto the brake pad carrier, and thus the brake pad carrier is pressed onto a braking surface formed on the end cap or onto a friction plate fixed to the end cap and having a braking surface. This has the advantage that safety is increased, since the brake is engaged when the power is off.

[0034] In an advantageous design, the armature plate and the brake plate carrier are surrounded by the cover and / or are arranged in an inner space region surrounded by the cover. Advantageously, the brake is completely surrounded and protected by the cover.

[0035] In an advantageous embodiment, the cover is designed as a plastic injection molded part. This has the advantage that it can be manufactured simply and cost-effectively. In the alternative embodiment made of steel, although higher tool costs are incurred due to the mechanically stronger material, safety can also be increased.

[0036] Further sensible combinations of features of the description and / or of the drawings will appear to a person skilled in the art, in particular from the objectives proposed and / or from a comparison with the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Now the utility model is described in detail according to the schematic diagram:

[0038] exist Figure 1 2 shows a longitudinal section through an electric machine according to the invention.

[0039] exist Figure 2 A partial view of the motor is shown in FIG.

[0040] exist Figure 3 The motor is shown in an oblique view.

[0041] List of reference numerals:

[0042] 1 End cap

[0043] 2 Magnets

[0044] 3 screw

[0045] 4 Cover

[0046] 5. Stator housing

[0047] 6 Bearing flange

[0048] 20 Sealing ring

[0049] 21 Flat seal DETAILED DESCRIPTION

[0050] As shown, the electric machine has a stator housing 5 which is connected to a bearing flange 6 on one side and to an end shield 1 on the other side.

[0051] The end cover 1 is spaced apart from the bearing flange 6 and receives a bearing for rotatably supporting the rotor shaft. The bearing flange 6 receives a further bearing for rotatably supporting the rotor shaft.

[0052] Long bolts connect the end cover 1 and the bearing flange 6 to the stator housing 5 .

[0053] Therefore, the corresponding long bolt passes through the notch of the end cover 1 and through the notch of the bearing flange 6. The bolt head of the long bolt is pressed onto the end cover 1 via the sealing ring 20 mounted on the long bolt, wherein the nut screwed onto the threaded area of ​​the long bolt is pressed onto the bearing flange 6. Therefore, both the bearing flange 6 and the end cover 1 are pressed onto the stator housing 5.

[0054] The sealing ring 20 ensures the safety and sealing of the connection between the long bolts and the bearing flange 6 .

[0055] Hence the long bolts that hold the motor together.

[0056] The electric motor also has an electromagnetically actuatable brake which has a ferromagnetic body 2 which is connected in a rotationally fixed manner to the end cap 1 by means of a threaded rod 3 which passes through the magnet 2 .

[0057] The spindle 3 protrudes from the magnet 2 so that the second brake can be mounted axially next to the aforementioned first brake, thereby achieving increased operational safety.

[0058] The magnet has an annular recess, the ring axis of which is parallel to the rotation axis of the rotor shaft of the motor. A coil that can be energized is accommodated in the annular recess.

[0059] An annular driver with external toothing is placed onto the rotor shaft and is connected to the rotor shaft in a rotationally fixed manner, in particular by means of a key connection.

[0060] The annular disc-shaped brake pad carrier is placed on the driver and its internal toothing meshes with the external toothing of the driver so that the brake pad carrier is connected to the driver and thus to the rotor shaft in a rotationally fixed manner and is arranged in an axially movable manner.

[0061] Brake pads are arranged on both axial sides of the brake pad carrier.

[0062] The ferromagnetic armature plate is axially arranged between the brake plate carrier and the magnet and is connected to the magnet in a non-rotatable manner.

[0063] In addition, the armature piece is arranged in an axially movable manner. In particular, the pin passes through the opening of the armature piece and is inserted into the recess or bore of the magnet.

[0064] A braking surface is formed on the end cover 1 .

[0065] A spring element supported on the magnet presses onto the armature plate.

[0066] Therefore, when the coil is energized, the armature plate is attracted to the magnet 2 against the spring force generated by the spring element. However, when the coil is not energized, the armature plate is pressed toward the brake pad carrier by the spring element, so that the brake pad carrier is pressed onto the brake surface formed on the end cover 1, which is arranged on the side of the brake pad carrier facing away from the armature plate.

[0067] Thus, the brake is released when the coil is energized and engaged when the coil is not energized.

[0068] The cover 4 is fixed on the end cover 1, wherein a flat seal 21 is arranged between the cover 4 and the end cover 1 to ensure a sealed connection between the cover 4 and the end cover 1. The end cover 1 is also a component forming a housing of the motor.

[0069] The long bolts are arranged radially within the radial range covered by the cover 4 .

[0070] The screw 3 is arranged radially within a radial range covered by the cover 4 .

[0071] The pins are arranged radially within the radial range covered by the cover 4 .

[0072] The axial direction is parallel to the rotation axis of the rotor shaft, and the radial direction, the circumferential direction and the radial distance are each based on the rotation axis of the rotor shaft of the electric machine.

[0073] The area covered by the brake pad carrier in the axial direction is arranged within the area covered by the cover 4 in the axial direction.

[0074] The area covered by the magnet 2 in the axial direction is arranged within the area covered by the cover 4 in the axial direction.

[0075] The region covered by the armature plate in the axial direction is arranged within the region covered by the cover 4 in the axial direction.

[0076] The radial range covered by the magnet 2 , the armature plate and the brake plate carrier is included in the radial range covered by the cover 4 .

[0077] The cover 4 thus surrounds the brake, wherein the interior space which includes the brake and is surrounded by the cover 4 is sealed by means of the flat seal 21 and the sealing ring 20 .

[0078] In order to reduce vibrations and increase rigidity, the outer circumference of the cover 4 is composed of four regions, each of which is a cylindrical shell segment whose cylindrical radius is greater than half of the maximum outer diameter of the cover 4 .

[0079] In this way, the cover 4 has a rounded, polygonal appearance, so that the liquid flows out quickly and achieves high rigidity and low vibration capacity. In addition, the largest possible volume of the surrounding inner space area can also be achieved. Here, the wall thickness of the cover 4 is preferably constant.

[0080] The area covered by each of the cylindrical shell segments in the circumferential direction is of the same size. The cylinder axis is parallel to the rotation axis of the rotor shaft but spaced apart.

[0081] In other embodiments according to the invention, the cover is not composed of four cylindrical shell segments, but of another number, three, five, six, seven or eight cylindrical shell segments. The area covered by each of the cylindrical shell segments in the circumferential direction is again of the same size. The cylinder axis is also parallel to the rotation axis of the rotor shaft, but spaced apart.

[0082] In other embodiments according to the present invention, a threaded rod with a nut is used instead of the long bolt with a bolt head.

[0083] In other embodiments according to the present invention, the driver and the rotor shaft are formed integrally together, that is, the external toothing is formed directly on the rotor shaft.

[0084] In other embodiments according to the present invention, the braking surface is formed on a plate, in particular a friction plate, which is connected to the end cover in a rotationally fixed manner and is arranged axially between the end cover and the brake plate carrier.

Claims

1. A motor, The electric motor has a stator housing, which is connected on one side to an end cover of the electric motor, the end cover receiving a bearing of a rotor shaft of the electric motor, and is connected on the other side to a bearing flange, the bearing flange receiving another bearing of the rotor shaft. The magnet of the electromagnetically actuable brake of the motor is connected to the end cover in a rotationally fixed manner. The magnet is arranged on the side of the end cover facing away from the stator housing in the axial direction. It is characterized in that The cover surrounds the magnet in a watertight and / or gastight manner to form a housing and is pressed onto the end cap via a centrally arranged flat seal, wherein the cover is pressed onto the end cap by the screw heads of screws whose threaded areas are screwed into threaded holes in the end cap.

2. The motor according to claim 1, It is characterized in that At least one threaded member passes through the bearing flange, the stator housing and the end cover, and the at least one threaded member is a bolt or a screw. The end cover is pressed toward the stator housing by means of a threaded member head of the threaded member or a nut screwed onto the threaded member, and the bearing flange is pressed toward the stator housing by means of a threaded member head of the threaded member or a nut screwed onto the threaded member.

3. The motor according to claim 2, It is characterized in that The sealing ring is put onto the threaded part and the sealing ring is against the end cover. The threaded part head or the nut is pressed onto the end cap via the sealing ring.

4. The electric machine according to any one of claims 1 to 3, It is characterized in that The cover has cylindrical shell sections which adjoin one another in the circumferential direction.

5. The motor according to claim 4, It is characterized in that The areas covered by the cylindrical shell segments in the circumferential direction are of equal size.

6. The electric machine according to claim 4, It is characterized in that The cylinder axis of each cylindrical housing segment is parallel to the rotation axis of the rotor shaft of the electric machine and is spaced apart from the rotation axis of the rotor shaft of the electric machine.

7. The electric machine according to claim 4, It is characterized in that The radius of each cylindrical shell section is respectively greater than half of the maximum outer diameter of the cover. or The radius of the cylindrical shell sections is respectively greater than the maximum radial distance of the cover with respect to the axis of rotation of the rotor shaft.

8. The electric machine according to any one of claims 1 to 3, It is characterized in that The wall thickness of the cover is constant. or The wall thickness of the cover is independent of the circumferential direction.

9. The electric machine according to claim 2 or 3, It is characterized in that The threaded element projects from the end cap into the interior region enclosed by the cover.

10. The electric machine according to claim 2 or 3, It is characterized in that The screw passes through the magnet in the axial direction and extends out of the magnet on both sides of the axial direction. Further magnets of further brakes can be fastened to threaded rods protruding from the magnets.

11. The electric machine according to any one of claims 1 to 3, It is characterized in that An annular driver with external teeth is placed on the rotor shaft and is connected to the rotor shaft in a rotationally fixed manner. The annular disc-shaped brake pad carrier is mounted on the driving member, and the inner tooth portion of the brake pad carrier meshes with the outer tooth portion of the driving member, so that the brake pad carrier is connected to the driving member in a non-rotatable manner and is arranged in a manner that can move axially toward the driving member. A coil capable of being energized is received in the annular recess of the magnet. The armature plate is arranged axially between the magnet and the brake pad carrier. The armature piece is connected to the magnet in a non-rotatable manner. The armature plate is arranged in an axially movable manner, wherein an axially oriented pin passing through an opening of the armature plate is pressed into a recess of the magnet. The armature plate is arranged on the side of the brake pad carrier that faces away from the end cover in the axial direction. Spring elements, which are supported on the magnet and are spaced apart from one another in the circumferential direction, press against the armature plate, and a braking surface is formed on the end cap.

12. The electric machine according to claim 11, It is characterized in that The armature plate and the brake plate carrier are surrounded by the cover and / or are arranged in an interior region surrounded by the cover.

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