An improved electric machine and hoist

Abstract

The utility model discloses an improved motor, including frame and setting stator and rotor on frame, and through bearing rotatory connection between rotor and frame, still include reinforcing plate, frame, stator and the any component on rotor is equipped with installation site, and reinforcing plate and installation site are fastened connection through connecting piece, the utility model discloses through setting the installation site of installation reinforcing plate on frame or stator or rotor when motor development, enhances structural rigidity, improves the common frequency of frame or changes modal vibration mode to avoid the resonance point. The installation site position scheme is flexible and changeable, can be aimed at different application scene, and the flexible adjustment scheme is stronger in compatibility. The present motor scheme is little to change, and reduces motor upgrade cost. Even if is the traction machine to complete production, when meeting the resonance problem in the actual installation and use on site, also can change the traction machine modal through installing reinforcing plate in different positions.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to an improved motor and a traction machine. Background Technology

[0002] Existing motors all need to address the issue of motor resonance noise, and the permanent magnet synchronous motors of traction machines also have the same problem.

[0003] From a structural perspective, traction machine permanent magnet synchronous motors often adopt an external rotor structure, which has a large radial dimension, short axial length, poor axial stiffness, and consequently a low axial natural frequency, making it easy to excite different forms of resonance.

[0004] From an excitation perspective, traction machine permanent magnet synchronous motors often use skewed slots and skewed poles to reduce cogging torque, but this introduces axial force, especially for concentrated winding schemes, where the effect of axial force is more pronounced due to the large number of air gap harmonics.

[0005] In summary, due to axial resonance, the permanent magnet synchronous motor of the traction machine can sometimes cause excessive vibration and noise, affecting elevator comfort and component lifespan. However, whether it's changing the electromagnetic scheme to reduce excitation or altering the motor's structural frequency, both require significant adjustments to the motor design, resulting in high manufacturing costs and long production cycles for the new motor. Utility Model Content

[0006] The purpose of this invention is to provide an improved motor that reduces resonance noise without significantly increasing the cost of the motor.

[0007] The purpose of this utility model is achieved as follows.

[0008] An improved motor includes a frame and a stator and a rotor mounted on the frame, the rotor and the frame being rotatably connected by bearings, and a reinforcing plate. Mounting positions are provided on any of the frame, stator, and rotor components, and the reinforcing plate and the mounting positions are fastened together by connectors.

[0009] Furthermore, the base, stator, or rotor is provided with at least one boss portion, the boss portion having a mounting surface, the mounting surface constituting the mounting position.

[0010] Furthermore, the base is provided with two sets of protrusions on the left and right sides, and one set of protrusions is fastened to a reinforcing plate.

[0011] Multiple mounting bosses are set on the base for machining and installing reinforcing plates, which enhances the structural rigidity of the base, increases the common frequency of the base, or changes the mode shape to avoid resonance points.

[0012] Furthermore, the two sets of bosses are arranged symmetrically on the left and right, and the two reinforcing plates are arranged symmetrically on the left and right.

[0013] Furthermore, the rotor is provided with the aforementioned boss portion.

[0014] Furthermore, the protrusions are arranged symmetrically on both sides.

[0015] Furthermore, the mounting position is located on the exposed surface of the corresponding frame, stator, or rotor.

[0016] The reinforcement plate is simple and easy to install.

[0017] Furthermore, the mounting position is provided with screw holes, the reinforcing plate is provided with through holes corresponding to the screw holes, and the connecting component is a bolt, which passes through the through holes and screw holes for threaded connection.

[0018] A traction machine comprising the aforementioned improved motor.

[0019] This invention enhances structural rigidity and increases the common frequency of the motor frame or alters the mode shape by setting mounting positions for reinforcing plates on the frame, stator, or rotor during motor development, thereby avoiding resonance points. The mounting position options are flexible and can be adjusted for different application scenarios, offering greater compatibility. It requires minimal modification to existing motor designs, reducing motor upgrade costs. Even after the traction machine is manufactured, resonance problems encountered during actual installation and use can be addressed by installing reinforcing plates at different locations to change the traction machine's mode shape. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of Embodiment 1.

[0021] Figure 2 This is a front view of Example 1.

[0022] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction.

[0023] Figure 4 This is a schematic diagram of the base structure in Embodiment 1.

[0024] Figure 5 This is a schematic diagram of the connection between the rotor and the mounting plate in Embodiment 2.

[0025] Figure 6 This is a schematic diagram of the rotor structure in Example 2. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Example 1, see Figure 1-4As shown, an improved motor for a traction machine includes a frame 1, a stator 2, a rotor 3, and a reinforcing plate 4. The stator 2 is fixed to the frame 1, and the rotor 3 is rotatably connected to the central shaft 11 of the frame 1 via bearings 5.

[0028] In this invention, any one of the components—the base 1, the stator 2, and the rotor 3—is provided with a mounting position 6, which is located on the exposed surface of the corresponding base 1, stator 2, or rotor 3. The base 1, stator 2, or rotor 3 is provided with at least one boss 7, and the boss 7 has a mounting plane 8, which constitutes the mounting position 6. The reinforcing plate 4 and the mounting position 6 are fastened together by a connector 9. Specifically, the mounting position 6 is provided with a screw hole 60, and the reinforcing plate 4 is provided with a through hole 40 corresponding to the screw hole 60. The connector 9 is a bolt, which passes through the through hole 40 and the screw hole 60 for threaded connection.

[0029] In this embodiment, the bottom of the base 1 is provided with two sets of protrusions 7, which are symmetrically arranged. One set of protrusions 7 is fastened to a reinforcing plate 4. The two sets of protrusions 7 include two spaced-apart protrusions. Each protrusion has a screw hole 60. The reinforcing plate 4 is in the shape of a straight line, and both ends of the reinforcing plate 4 have through holes 40. Two sets of bolts fix the reinforcing plate 4 to the base 1. The two reinforcing plates 4 are symmetrically arranged. In this embodiment, through simulation calculation, after adding the reinforcing plate 4, the axial modal frequency of the same order increases by 30.6%, which meets the requirement of avoiding the natural frequency. The measured vibration reduction effect is also quite obvious.

[0030] Example 2, see Figure 5 and Figure 6 As shown, the difference between this embodiment and Embodiment 1 lies in the different designs of the mounting position 6 and the reinforcing plate 4. In this embodiment, the rotor 3 is provided with a boss 7, which is symmetrically arranged on both sides, and has four screw holes 60 symmetrically arranged on both sides. The reinforcing plate 4 is a circular plate with four through holes 40. Four sets of bolts pass through the through holes 40 and the corresponding screw holes 60 for threaded connection, so as to install the reinforcing plate 4 on the end face of the rotor 3.

[0031] The two embodiments of this utility model are described using a traction machine motor as an example. This solution can be applied to motors for any other purpose to achieve noise reduction. Practitioners can also achieve the same effect by modifying and applying this solution to motors for other purposes.

[0032] The terms used in this utility model, such as "first," "second," etc., do not indicate any order, quantity, or importance, but are only used for distinction.

[0033] In this utility model, the terms "a" or "an" are used to indicate not a limitation on the quantity, but rather to indicate the existence of at least one of the mentioned objects.

[0034] In this utility model, terms indicating direction or location such as front end, rear end, top, bottom, side, longitudinal, transverse, middle, center, outside, inside, horizontal, vertical, left, right, above, below, etc., are used to indicate relative positions rather than absolute positions.

[0035] Terms used in this invention, such as "approximately," "overall," "approximately," and "similar," are limiting terms used to indicate features that exist but allow for certain deviations. The amount of deviation allowed may vary depending on the specific context.

Claims

1. An improved electric motor, comprising a frame and a stator and a rotor mounted on the frame, wherein the rotor and the frame are rotatably connected by bearings, characterized in that, It also includes a reinforcing plate, and mounting positions are provided on any of the components of the frame, stator, and rotor. The reinforcing plate and the mounting positions are fastened together by connectors.

2. The improved motor according to claim 1, characterized in that, The frame, stator, or rotor is provided with at least one boss, and the boss is provided with a mounting surface, which constitutes the mounting position.

3. The improved motor according to claim 2, characterized in that, The base is provided with two sets of protrusions on the left and right, and one set of protrusions is fastened to a reinforcing plate.

4. The improved motor according to claim 3, characterized in that, The two sets of protrusions are symmetrically arranged on the left and right, and the two reinforcing plates are symmetrically arranged on the left and right.

5. The improved motor according to claim 2, characterized in that, The rotor is provided with the aforementioned boss portion.

6. The improved motor according to claim 2, characterized in that, The protrusions are arranged symmetrically on the left and right.

7. The improved motor according to claim 1, characterized in that, The mounting position is located on the exposed surface of the corresponding frame, stator, or rotor.

8. The improved motor according to claim 1, characterized in that, The mounting position is provided with screw holes, and the reinforcing plate is provided with through holes corresponding to the screw holes. The connecting component is a bolt, which passes through the through holes and screw holes for threaded connection.

9. A traction machine, characterized in that, Including the improved motor as described in any one of claims 1-6.

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