Pole iron core limiting assembly of inclined-axis motor

Abstract

The utility model discloses a pole iron core limiting assembly of an inclined-axis motor. The pole iron core limiting assembly comprises a magnet yoke pressing plate and a limiting device, the limiting device is composed of a connecting plate and an extending supporting column, the two sides of the connecting plate are each provided with a limiting device screw hole, and the extending supporting column is connected and welded to the middle of the limiting plate; the magnet yoke pressing plate is thermally sleeved on the shaft, and a spigot is arranged on the shaft on one side of the shaft extension end adjacent to the magnet yoke pressing plate; magnet yoke screw holes corresponding to the screw holes of the limiting device in position are formed in the two sides of a T tail groove of the yoke part of the magnet yoke pressing plate at the shaft extension end, the limiting device is fixed to the yoke part of the magnet yoke pressing plate through a bolt, the end of the extension supporting column abuts against the magnetic pole pressing plate, and the abutting position is the T tail position of the magnetic pole pressing plate; when the shaft extension end of the motor is installed in a downward inclined mode, the extension supporting column supports the T tail position of the magnetic pole pressing plate. According to the utility model, the magnetic pole iron core is supported when the motor is obliquely installed, so that the magnetic pole pressing plate can fully press the magnetic pole iron core punching sheet, thereby pressing the whole magnetic pole iron core.

Description

Technical Field

[0001] This utility model relates to a device used in the field of motor manufacturing, specifically a magnetic pole core limiting component for a slant-axis motor. Background Technology

[0002] Please see Figure 1 and Figure 2 For horizontally mounted motors, when the speed is below 1500 rpm, a laminated magnetic pole core 4 structure with a T-tail is typically used. This means the magnetic pole core 4 is press-fitted with magnetic pole laminations 1, which are stamped from 1.5mm thick steel plates. The magnetic pole laminations have T-tails 11, the dimensions of which are selected based on the centripetal force required by the magnetic poles during rotor rotation. The structure of the magnetic pole laminations 1 is as follows: Figure 1 As shown. Since the magnetic pole core 4 itself does not bear external axial force, magnetic pole pressure plates 3 are placed at both ends of the magnetic pole core to press down the magnetic pole laminations 1, and the magnetic pole core is tightened in the axial direction by the magnetic pole screw.

[0003] When a motor is used to drive loads such as water pumps or dredging cutters, it often needs to be installed at an angle with the motor shaft extending downwards. In this case, the magnetic pole core lacks an upward supporting force along the motor's axial direction, making it prone to slipping under gravity. In particular, since the rotor is a rotating component, it cannot be supported by supports fixed to the base or mounting foundation. Furthermore, the T-tail portion of the magnetic pole laminations is limited by size and lacks space for magnetic pole screw installation, making the T-tail portion even more prone to loosening. Therefore, a device is needed to support the magnetic pole core and tighten the T-tail to prevent downward slippage of the magnetic pole core and loose clamping of the magnetic pole laminations, which can generate electromagnetic noise, increase electromagnetic losses, and ultimately damage the motor. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a limiting component for the magnetic pole core of a slanted shaft motor, which can press the T-tail part of the magnetic pole core when the motor is installed at an angle, thereby supporting the entire magnetic pole core.

[0005] One technical solution to achieve the above objective is: a magnetic pole core limiting assembly for a slant-axis motor, including a magnetic yoke pressure plate and a limiting device;

[0006] The limiting device consists of a connecting plate and an extension support column. A limiting device screw hole is opened on each side of the connecting plate, and the extension support column is welded to the middle of the limiting plate.

[0007] The magnetic yoke pressure plate is heat-fitted onto the shaft, and a stop is provided on the shaft near the shaft extension end adjacent to the magnetic yoke pressure plate; screw holes corresponding to the screw hole positions of the limiting device are opened on both sides of the T-tail groove of the magnetic yoke pressure plate at the shaft extension end; the limiting device is fixed to the magnetic yoke pressure plate by bolts; the end of the extended support column abuts against the magnetic pole pressure plate, and the abutting position is the T-tail position of the magnetic pole pressure plate.

[0008] When the motor shaft extension is installed with the shaft extension end tilted downwards, the extended support column supports the T-tail position of the magnetic pole pressure plate.

[0009] Preferably, a fitting gap is left between the limiting device and the magnetic yoke pressure plate, and an adjusting shim is provided in the fitting gap to adjust the axial position of the limiting device.

[0010] Preferably, the adjusting shim is a rectangular structure with a snap-fit ​​groove, the shape of which matches the connecting plate, and the two sides of which have shim through holes corresponding to the positions of the screw holes of the limiting device.

[0011] Preferably, the axial length of the clearance is 1 mm.

[0012] The magnetic pole core limiting assembly of the slanted shaft motor of this utility model has the following advantages:

[0013] 1. It can effectively prevent axial displacement of the magnetic poles and can press the T-tail part of the iron core tightly;

[0014] 2. The axial direction of the limiting device is adjustable to ensure that the magnetic pole core is pressed tightly;

[0015] 3. The limiting device is secured by bolts, making it easy to install and remove;

[0016] 4. The limit device has a simple structure and low cost. Attached Figure Description

[0017] Figure 1 A schematic diagram of a magnetic pole piece with a T-tail;

[0018] Figure 2 A schematic diagram of an existing motor structure that uses magnetic pole plates to press the magnetic pole core together;

[0019] Figure 3 This is a front view of the limiting device of this utility model;

[0020] Figure 4 This is a side view of the limiting device of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the magnetic yoke pressure plate of this utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the motor's magnetic pole pressure plate;

[0023] Figure 7 A half-sectional view of the motor axial direction for applying this utility model;

[0024] Figure 8 A schematic diagram of the radial structure of the motor to which this utility model is applied;

[0025] Figure 9 This is a schematic diagram of the adjusting shim structure of this utility model. Detailed Implementation

[0026] To better understand the technical solution of this utility model, a detailed description is provided below through specific embodiments:

[0027] Please see Figures 3 to 9 The present invention relates to a limiting assembly for the magnetic pole core of a slant-axis motor, comprising a magnetic yoke pressure plate 2 and a limiting device 5.

[0028] Please see Figure 3 and Figure 4 The limiting device consists of a connecting plate 51 and an extension support column 52. A limiting device screw hole 53 is opened on each side of the connecting plate 51, and the extension support column 52 is connected to and welded to the middle of the limiting plate, located between the two limiting device screw holes 53.

[0029] Please see Figures 5 to 8 The magnetic yoke plate 2 and the shaft are fitted together by a heat-shrink mechanism, forming an interference fit. A stop is provided on one side of the shaft extension end adjacent to the magnetic yoke plate 2 to ensure reliable fixation of the magnetic yoke plate 2 to the shaft when the motor shaft extension end is installed at a downward tilt. Screw holes 21 corresponding to the positions of the limiting device screw holes 53 are provided on both sides of the T-tail groove of the magnetic yoke plate 2 at the shaft extension end. The limiting device 5 is fixed to the magnetic yoke plate 2 by bolts, and the end of the extended support column 52 abuts against the magnetic pole plate 3 at the T-tail position of the magnetic pole plate 3.

[0030] Preferably, a fitting clearance is provided between the limiting device 5 and the magnetic yoke plate 2. This fitting clearance allows for a 1mm axial adjustment range for the limiting device 5 along the motor axis. The axial position of the limiting device 1 is adjusted by setting an adjusting shim 6 within the fitting clearance. The adjusting shim 6 is a rectangular structure with a snap-fit ​​groove 61, its shape matching the connecting plate 51, and has shim threaded through holes 62 on both sides corresponding to the screw holes of the limiting device. Specifically, as shown... Figure 9 As shown. After adjusting the axial position of the limiting device 1 by installing the adjusting plate 6, it is finally ensured that the extension support column 52 of the limiting device 5 can press the T-tail of the magnetic pole pressure plate 3, and then the entire magnetic pole core 4 is pressed by the magnetic pole pressure plate 3.

[0031] When the motor shaft extension is installed at a downward tilt, the extended support column supports the T-tail position of the magnetic pole plate, providing an upward supporting force, thereby pressing the magnetic pole plate tightly against the entire magnetic pole core. This application effectively prevents axial displacement of the magnetic poles and can press the magnetic pole core laminations together, reducing electromagnetic noise. This device has been applied to motors in several water conservancy projects with good results.

[0032] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any changes or modifications to the above embodiments within the scope of the essential spirit of the present utility model will fall within the scope of the claims of the present utility model.

Claims

1. A magnetic pole core limiting assembly of a skewed shaft motor, comprising a magnetic yoke pressing plate, characterized in that, The limiting device is composed of a connecting plate and an extending support column, and a limiting device screw hole is formed on each side of the connecting plate, and the extending support column is connected to the middle part of the limiting plate; The magnetic yoke pressing plate is hot-jointed on the shaft, and a stop opening is arranged on the shaft adjacent to the magnetic yoke pressing plate near the shaft extension end; the T tail groove of the magnetic yoke pressing plate at the shaft extension end is provided with a magnetic yoke screw hole corresponding to the position of the limiting device screw hole, and the limiting device is fixed on the magnetic yoke pressing plate through bolts, and the end of the extending support column abuts against the magnetic pole pressing plate, and the abutting position is the T tail position of the magnetic pole pressing plate; When the motor shaft extension end is installed downwardly, the extending support column supports the T tail position of the magnetic pole pressing plate. A cooperation gap is left between the limiting device and the magnetic yoke pressing plate, and an adjusting gasket is arranged in the cooperation gap, and the axial position of the limiting device is adjusted through the adjusting gasket.

2. A skewed shaft motor pole core limiting assembly according to claim 1, characterized in that, The adjusting gasket is a rectangular structure with a clamping groove, and the shape is matched with the connecting plate, and the two sides are provided with gasket screw holes corresponding to the positions of the limiting device screw holes.

3. A skewed shaft motor pole core limiting assembly according to claim 1, characterized in that, ​

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