Electric machine having laminated stator core, bearing flange and bearing cap
By introducing stator laminations, bearing flanges, and bearing covers into the motor design, and utilizing intermediate plates and fan devices, the problem of low motor cooling efficiency was solved, achieving effective heat dissipation and cooling.
Patent Information
- Application Number
- CN202423178863.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Existing motors suffer from low cooling efficiency, particularly in terms of heat dissipation and emission.
By introducing design improvements such as stator laminations, bearing flanges, and bearing covers into the motor, and utilizing a combination of intermediate plates, fan devices, and seals, effective heat dissipation and airflow channels are achieved, enhancing the cooling effect.
It improves the heat dissipation and cooling efficiency of the motor, reduces the peak temperature, and enhances the overall performance of the motor.
Smart Images
Figure CN223583960U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a motor having a stator lamination assembly, a bearing flange, and a bearing cover. Background Technology
[0002] As is well known, an electric motor includes a junction box for connecting the stator winding wires to the power supply lines from the environment. Utility Model Content
[0003] Therefore, the purpose of this utility model is to improve a motor, wherein the motor cooling should be improved.
[0004] According to this invention, this objective is achieved by an electric motor having the following characteristics.
[0005] Regarding the electric motor, a key feature of this invention is that the motor is equipped with a stator lamination assembly, a bearing flange, and a bearing cover, wherein the bearing flange has a through notch / opening / hole.
[0006] The lower component of the junction box is fixed to the bearing flange via an intermediate plate.
[0007] The middle plate is attached to the lower component of the junction box.
[0008] The upper component of the junction box covers the opening of the lower component and is connected to the lower component on the side of the lower component away from the bearing flange.
[0009] The first seal is located between the intermediate plate and the lower component of the junction box.
[0010] The intermediate plate has a protrusion that extends toward the components on the junction box, and the first seal abuts against the protrusion.
[0011] The advantage here is that the intermediate plate absorbs heat flow from the bearing flange and thus helps improve heat dissipation. Improved heat removal is achieved in this way. Furthermore, the intermediate plate, due to its through-hole, allows for air communication between the internal cavity of the junction box and the internal cavity of the bearing flange. Therefore, heat flow is even diffused into the junction box, and thus heat dissipation to the environment is improved through the enlarged surface area.
[0012] In a favorable design, the bearing cap is constructed identically to the bearing flange. The advantage here is that only one component needs to be stocked during manufacturing.
[0013] In an advantageous design, the gaps not covered by the junction box formed by the lower and upper components are each covered with a corresponding cover. The advantage here is that airflow can be discharged from the inner cavity of the bearing flange into the environment through these gaps.
[0014] In one advantageous design, a fan assembly is fixed to the bearing cover, which directs airflow through one of the openings in the bearing cover into the inner cavity of the bearing cover. The advantage of this is improved cooling.
[0015] In a favorable design, the corresponding cover has a sheet-like structure.
[0016] In particular, the sheet-like structure has a thin sheet facing away from the junction box, which allows the airflow to be discharged in a direction away from the junction box.
[0017] In an advantageous design, the inner cavity region of the bearing cap communicates with the inner cavity region of the bearing flange through—particularly in the axial direction—a notch passing through the stator lamination assembly. This allows airflow from the inner region of the bearing cap through the notch in the stator lamination assembly to reach the inner cavity region of the bearing flange.
[0018] In particular, airflow exits from the inner cavity of the bearing flange between the thin plates of the lamination structure into the motor environment. The advantage here is that the stator laminations dissipate heat through the airflow and thus improve cooling.
[0019] In an advantageous design, the fan unit has a fan driven by an electric drive unit.
[0020] In this configuration, the rotation axis of the fan is parallel to the rotation axis of the motor's rotor shaft.
[0021] In particular, the axial direction is parallel to the rotation axis of the motor's rotor shaft, the circumferential direction is based on the rotation axis of the rotor shaft, and the radial direction is also based on the rotation axis of the rotor shaft. The advantage of this is that the intensity of the airflow is independent of the rotor shaft's rotational speed.
[0022] In an advantageous design, the intermediate plate has a protrusion on its side facing the lower component of the junction box, and the protrusion has a notch through the intermediate plate.
[0023] The bearing flange has a through notch, which is adjacent to a notch in the intermediate plate.
[0024] The lower component of the junction box has a through-hole adjacent to the notch in the intermediate plate, specifically enabling the inner cavity area surrounded by the junction box to connect the notch in the intermediate plate with the inner cavity area surrounded by the bearing flange.
[0025] In particular, the spacers traverse the gaps in the intermediate plate, allowing cables or wires carrying different voltages to be separated from each other. The advantage here is that the protrusions increase the heat capacity of the intermediate plate and thus reduce peak temperatures.
[0026] In a favorable design, in the corner regions of the square-structured stator laminations, sliders / slot blocks are pushed into axially through slots in the stator laminations that narrow towards the environment.
[0027] In particular, the sliders are held in a form-locking manner within the stator laminations in the radial direction. The advantage here is that, unlike stator laminations which are composed of stacked single laminations, the sliders are constructed integrally and thus conduct a portion of the heat flow without heat transfer.
[0028] In a favorable design, corresponding retaining plate areas are constructed on the bearing flange and bearing cover.
[0029] The retaining plate area rests against the slider, specifically against the front or rear end side of the slider in the axial direction.
[0030] Specifically, the corresponding retaining plate area is pressed against the corresponding slider by screws that pass through the corresponding retaining plate area and are screwed into axially oriented threaded holes, particularly by the screw heads. The advantage here is that the retaining plate area is pressed against the slider by screws, which can be screwed into solid sliders.
[0031] In an advantageous design, the retaining plate area extends further in the circumferential direction than the corresponding slider. The advantage here is that the slider is covered in the circumferential direction and therefore has a sufficiently large contact surface to provide low thermal resistance.
[0032] In an advantageous design, the bearing cover, together with its retaining plate area, is constructed integrally, particularly as a single piece. The advantage here is that a large clamping force can be achieved.
[0033] In a favorable design, the bearing flange, together with its retaining plate area, is constructed integrally, particularly as a single piece. The advantage here is that it allows for the achievement of large connection forces.
[0034] In an advantageous design, within the area covered circumferentially by the corresponding retaining plate area, only the corresponding retaining plate area protrudes radially on the bearing flange, specifically to provide free space for manipulating the corresponding screw screwed into the corresponding slider. The advantage here is that the screw can be manipulated unimpeded and easily.
[0035] In an advantageous design, in the area covered circumferentially by the corresponding retaining plate area, only the corresponding retaining plate area protrudes radially from the bearing cap, specifically to provide free space for manipulating the corresponding screw screwed into the corresponding slider. The advantage here is that simple operation can be achieved.
[0036] In an advantageous design, the respective retaining plate areas of the bearing flange each comprise the outermost surface areas of the bearing flange in the radial direction. The advantage here is that the slider can be covered not only in the circumferential direction but also in the radial direction.
[0037] In an advantageous design, the respective retaining plate regions of the bearing cap each have and / or include the outermost surface regions of the bearing cap in the radial direction. The advantage here is that the slider is radially covered and thus effective heat transfer is achieved.
[0038] In an advantageous design, the protrusion of the bearing flange extends radially beyond the first seal at each circumferential location.
[0039] In particular, the area covered by the protrusion in the radial direction includes the area covered in the radial direction by the contact surface between the lower component of the junction box and the first seal. The advantage here is that the first seal is laterally abutted, and therefore the clamping force is arranged within a tangential plane—referenced to the axis of rotation of the rotor shaft.
[0040] This invention is not limited to the above-described combination of features. For those skilled in the art, particularly for purposes proposed and / or proposed by comparison with the prior art, other reasonable combinations of the above-described combination of features and / or individual features and / or features to be described below and / or features in the accompanying drawings are possible. Attached Figure Description
[0041] The present invention will now be described in detail with reference to the schematic diagram:
[0042] exist Figure 1 The motor according to the present invention is shown in a perspective view.
[0043] exist Figure 2 The area of the motor with bearing flange 1 is shown in a perspective view.
[0044] exist Figure 3 The middle plate 21 of the motor is shown in a perspective view.
[0045] exist Figure 4 The bearing flange 1 is shown in a perspective view from another viewing direction.
[0046] exist Figure 5 The stator lamination group 2 of the motor is shown in a perspective view.
[0047] List of reference numerals in the attached diagram:
[0048] 1 Bearing Flange
[0049] 2 stator laminations
[0050] 3. Bearing caps, especially bearing flanges
[0051] 4 Junction Box Lower Components
[0052] 5. Components on the junction box
[0053] 6. Fan unit
[0054] 7. Holding plate area
[0055] 8 Covering parts
[0056] 20 Seals
[0057] 21 Intermediate Plate
[0058] 22. Protrusion
[0059] 23 First sealing element
[0060] 30 gap
[0061] 40 gap
[0062] 41 Spare sheet
[0063] 50 sliders
[0064] 51 gap Detailed Implementation
[0065] As shown in the attached figures, the motor has a stator lamination assembly 2, which is arranged axially between the bearing flange 1 and the bearing cover 3, particularly another bearing flange.
[0066] A bearing is received in the bearing flange 1 for rotatably supporting the rotor shaft of the motor, wherein a second bearing for rotatably supporting the rotor shaft is received in the bearing cover 3.
[0067] The axial direction is parallel to the rotation axis of the rotor shaft. The circumferential and radial directions are also referenced to the rotation axis of the rotor shaft.
[0068] The stator windings of the motor are received in the stator lamination group 2. The stator lamination group 2 has single laminations stacked on top of each other in the axial direction, and these single laminations are made into stamped parts.
[0069] Preferably, the bearing cover 3 and the bearing flange 1 are designed to be structurally identical, and in particular, completely identical to each other.
[0070] The junction box is fixed to the bearing flange 1 via an intermediate plate 21. For this purpose, the intermediate plate 21 is placed on the bearing flange 1.
[0071] The lower component 4 of the junction box is placed on the intermediate plate 21, wherein a first seal 23 is arranged between the lower component 4 of the junction box and the intermediate plate 21.
[0072] Another seal 20 is arranged between the bearing flange 1 and the intermediate plate 21.
[0073] The intermediate plate 21 has a notch 30 that is adjacent to the through notch of the bearing flange 1 and also to the through notch of the lower component 4 of the junction box. Therefore, the inner cavity region surrounded by the bearing flange 1 communicates with the inner cavity region of the junction box.
[0074] The upper part 5 of the junction box covers another opening of the lower part 4 of the junction box on its side opposite to the intermediate plate 21. By means of cable thread connection, the power supply line is guided into the inner cavity area of the junction box formed by the lower part 4 and the upper part 5 of the junction box and electrically connected to the stator winding on the wiring elements arranged in the inner cavity area.
[0075] Seals 20 and 23 surround the notch 30 of the intermediate plate 21.
[0076] Preferably, the seals 20 and 23 are rectangular in construction, and the notch 30 is rectangular in construction. In particular, the notch has a rectangular face shape, especially with rounded corners.
[0077] The spacer 41 runs across the notch 30 of the intermediate plate 21. Therefore, cables or wires carrying different voltages can be separated from each other by means of the spacer 41. This improves safety.
[0078] In the corner region of the square stator lamination assembly, the slider 50 is pushed into a slot in the stator lamination assembly that narrows towards the environment and extends through in the axial direction. Therefore, the slider 50 is held in a form-locking manner in the stator lamination assembly 2 in the radial direction.
[0079] Because the slider 50 is made of a solid material, especially steel or aluminum, threaded holes can be machined into the slider 50 so that the component can be fixed or connected to the motor.
[0080] Specifically, the corresponding retaining plate region 7 of the bearing flange 1 or bearing cover 3 can be arranged on the front and rear ends of the corresponding slider 50 in the axial direction. This retaining plate region is pressed onto the corresponding slider 50 by screws passing through the retaining plate region 7 and screwed into axially oriented threaded holes, particularly by the respective screw heads of the respective screws. Here, the retaining plate region 7 extends further than the corresponding slider 50 in the circumferential direction.
[0081] To operate the screw, the retaining plate area 7 of the bearing flange 1 and the bearing cover 3 can be approached from the axial direction on the side axially away from the stator lamination group 2, because both the bearing flange 1 and the bearing cover 3 have their own radially oriented, corresponding recesses.
[0082] The bearing cover 3, together with its retaining plate area 7, is integrally constructed, particularly as a single piece. Similarly, the bearing flange 1, together with its retaining plate area 7, is integrally constructed, particularly as a single piece.
[0083] The stator lamination 2 has an axially extending notch 51, which serves as a cooling channel.
[0084] The fan unit 6 delivers airflow to the inner cavity region surrounded by the bearing cover 3. The airflow flows from this inner cavity region through the notch 51 of the stator lamination group 2 into the inner cavity region surrounded by the bearing flange 1.
[0085] Because the bearing flange 1 has radially penetrating notches that are spaced apart from each other in the circumferential direction, airflow passes through these notches and is discharged into the environment there. Therefore, the airflow cools the motor, especially the stator lamination assembly 2, and thus the corresponding stator windings received in the stator lamination assembly.
[0086] The notches on the bearing flange 1 are formed identically to each other, but are spaced apart in the circumferential direction. The notches on the bearing flange 1 not covered by the intermediate plate 21 or the junction box are covered by a cover 8 having a sheet-like structure with downward-pointing thin plates. This allows air to flow downwards, i.e., toward the side away from the junction box, from the inner cavity area of the bearing flange 1. It also prevents rainwater or splash water from above from seeping in. However, if water does seep into the inner cavity area, it flows out through a notch arranged on the side away from the junction box.
[0087] The intermediate plate 21 has a rectangular protrusion 22 on its side facing the junction box, and a first seal 23 abuts against the protrusion, wherein the first seal 23 seals toward the lower component 4 of the junction box.
[0088] In other embodiments according to the present invention, instead of an external fan device 6 having its own electric drive, a fan connected to the motor rotor shaft in a manner that prevents relative rotation is used to draw airflow through the notch in the bearing cover 3.
Claims
1. A motor having a stator lamination assembly, a bearing flange, and a bearing cover, Its features are, The bearing flange has a through notch. The lower component of the junction box is fixed to the bearing flange via an intermediate plate. The intermediate plate is attached to the lower component of the junction box. The upper component of the junction box covers the opening of the lower component and is connected to the lower component on the side of the lower component away from the bearing flange. The first seal is located between the intermediate plate and the lower component of the junction box. The intermediate plate has a protrusion that extends toward the components on the junction box, and the first seal abuts against the protrusion.
2. The motor having a stator lamination assembly, bearing flange, and bearing cover as described in claim 1, Its features are, The bearing cap has the same construction as the bearing flange.
3. The motor having a stator lamination assembly, bearing flange, and bearing cover as described in claim 1 or 2. Its features are, Those gaps that are not covered by the junction box formed by the lower and upper components of the junction box are covered by corresponding covers.
4. The motor having a stator lamination assembly, bearing flange, and bearing cover as described in claim 1 or 2. Its features are, A fan device is fixed on the bearing cover, which delivers airflow through one of the openings in the bearing cover into the inner cavity of the bearing cover.
5. The motor having a stator lamination assembly, a bearing flange, and a bearing cover as described in claim 3, Its features are, The corresponding cover has a sheet-like structure. The sheet-like structure design features a thin plate facing away from the junction box, allowing airflow to exit in a direction away from the junction box.
6. The motor having a stator lamination assembly, a bearing flange, and a bearing cover as described in claim 4, Its features are, The inner cavity region of the bearing cover communicates with the inner cavity region of the bearing flange in the axial direction through a notch in the stator lamination assembly, allowing airflow to travel from the inner region of the bearing cover through the notch in the stator lamination assembly to the inner cavity region of the bearing flange. Air flows from the inner cavity of the bearing flange through the thin sheets of the sheet structure into the motor environment.
7. The motor having a stator lamination assembly, bearing flange, and bearing cover as described in claim 4, Its features are, The fan unit has a fan driven by an electric drive unit. The rotation axis of the fan is parallel to the rotation axis of the motor's rotor shaft. The axial direction is parallel to the rotation axis of the rotor shaft of the motor, the circumferential direction is based on the rotation axis of the rotor shaft, and the radial direction is based on the rotation axis of the rotor shaft.
8. The motor having a stator lamination assembly, bearing flange, and bearing cover according to claim 1 or 2, Its features are, The protrusion in the middle plate has a notch that passes through the middle plate. The through-hole of the bearing flange is adjacent to the notch in the intermediate plate. The lower component of the junction box has a through-hole adjacent to the notch in the intermediate plate, so that the inner cavity area surrounded by the junction box connects the notch in the intermediate plate with the inner cavity area surrounded by the bearing flange. The spacer runs across the gap in the middle plate, allowing cables or wires of different voltage levels to be separated from each other.
9. The motor having a stator lamination assembly, bearing flange, and bearing cover according to claim 1 or 2, Its features are, In the corner region of the square-structured stator lamination assembly, a slider is pushed into a slot in the stator lamination assembly that narrows towards the environment and extends through the axial direction. This allows the slider to be held in a form-locked manner within the stator lamination assembly in the radial direction.
10. The motor having a stator lamination assembly, bearing flange, and bearing cover according to claim 1 or 2. Its features are, Corresponding retaining plate areas are constructed on the bearing flange and bearing cover. Keep the plate area pressed against the slider. The corresponding retaining plate area is pressed onto the corresponding slider by screws that pass through the corresponding retaining plate area and are screwed into axially oriented threaded holes.
11. The motor having a stator lamination assembly, a bearing flange, and a bearing cover according to claim 10, characterized in that, The retaining plate area is respectively attached to the front or rear end face of the slider in the axial direction.
12. The motor having a stator lamination assembly, a bearing flange, and a bearing cover as described in claim 10, Its features are, The holding plate area extends further than the corresponding slider in the circumferential direction.
13. The motor having a stator lamination assembly, a bearing flange, and a bearing cover according to claim 10, Its features are, The bearing cover, together with its retaining plate area, is constructed as a single unit. and / or The bearing flange, together with its retaining plate area, is constructed as a single unit.
14. The motor having a stator lamination assembly, a bearing flange, and a bearing cover according to claim 10, Its features are, In the area covered circumferentially by the corresponding retaining plate area, only the corresponding retaining plate area on the bearing flange protrudes radially to provide free space for manipulating the corresponding screw screwed into the corresponding slider. And / or, In the area covered by the corresponding retaining plate area in the circumferential direction, only the corresponding retaining plate area on the bearing cap protrudes radially to provide free space for manipulating the corresponding screw screwed into the corresponding slider.
15. The motor having a stator lamination assembly, a bearing flange, and a bearing cover according to claim 10, Its features are, The corresponding retaining plate areas of the bearing flange each have the outermost surface areas of the bearing flange in the radial direction. And / or, The corresponding retaining plate areas of the bearing cap each have the outermost surface areas of the bearing cap in the radial direction.
16. The motor having a stator lamination assembly, a bearing flange, and a bearing cover according to claim 1 or 2, Its features are, At each circumferential location, the protrusion of the intermediate plate extends radially beyond the first seal. The area covered by the protrusion in the radial direction includes the area covered in the radial direction by the contact surface between the lower component of the junction box and the first seal.