Low-cost noise reduction motor

Abstract

The utility model discloses a low-cost noise-reduction motor, which comprises a plastic-coated stator, the middle part of the plastic-coated stator is sequentially connected with a rotor and a rotating shaft, one end of the plastic-coated stator is detachably connected with a rear mounting cover, the inner side of the rear mounting cover is provided with a triangular cover, and the triangular cover is connected with the rotating shaft through a bearing. The motor is characterized in that a mounting part is formed at one end, close to the triangular cover, of the plastic-coated stator, the periphery of the mounting part is in buckled connection with a rear mounting cover through a positioning groove, the rear mounting cover and the mounting part are used for extruding and limiting the triangular cover after being connected with each other, and one end of the triangular cover is detachably connected with the rear mounting cover through a fixing assembly. And the fixing assembly is used for mutually fixing the triangular cover and the rear mounting cover after the triangular cover is positioned. According to the utility model, the positioning precision and the connection stability of the rotating shaft can be improved, so that the vibration noise of the motor during use is reduced.

Description

Technical Field

[0001] This utility model relates to a washing machine motor, and more particularly to a low-cost noise-reducing motor. Background Technology

[0002] Currently, BMC stator plastic-coated motors used in washing machines mainly consist of a plastic-coated stator, rotor, shaft, bearing cover, motor end cover, and rear mounting cover. The plastic-coated stator is formed by plastic coating BMC material on the outside of the stator to form the motor housing. The rotor and shaft are both connected inside the plastic-coated stator. One end of the shaft extends to the end of the plastic-coated stator and is connected to the motor housing via a bearing and bearing cover. Finally, the motor end cover and rear mounting cover are installed on the outside of the bearing cover. The motor end cover seals the inside of the plastic-coated stator, and the rear mounting cover fixes the motor to the external frame.

[0003] Based on the above, existing methods for installing bearing covers in stator-coated motors primarily involve connecting the bearing cover to the motor housing with screws, or directly molding the bearing cover and motor housing together. However, both of these methods result in the bearing cover being completely fixed after installation, meaning it cannot be adjusted with the shaft position. This causes vibration and noise problems in the motor when there is a misalignment between the stator-rotor connection in the middle of the shaft and the bearing connection at the end of the shaft, thus reducing the motor's operational stability. Furthermore, changing the bearing cover connection from a fixed connection to a movable connection eliminates the end-positioning function of the shaft, affecting the actual rotational performance of the shaft.

[0004] Therefore, existing stator-coated motors cannot simultaneously guarantee the positioning accuracy and connection stability of the rotating shaft. Utility Model Content

[0005] The purpose of this invention is to provide a low-cost, noise-reducing motor. It can improve the positioning accuracy and connection stability of the rotating shaft.

[0006] The technical solution of this utility model is as follows: A low-cost noise reduction motor includes a plastic-coated stator, a rotor and a shaft connected sequentially in the middle of the plastic-coated stator, a rear mounting cover detachably connected to one end of the plastic-coated stator, a triangular cover provided on the inner side of the rear mounting cover, the triangular cover and the shaft being connected to each other via bearings, a mounting part formed on the plastic-coated stator near the triangular cover, the rear mounting cover being fastened to the periphery of the mounting part via positioning grooves, the rear mounting cover and the mounting part being used to squeeze and limit the triangular cover after being connected to each other, an annular limiting surface provided in the middle of the rear mounting cover for axially limiting the triangular cover, a gap being left between the periphery of the triangular cover and the annular limiting surface, one end of the triangular cover being detachably connected to the rear mounting cover via a fixing component, the fixing component being used to fix the triangular cover and the rear mounting cover to each other after the triangular cover is positioned.

[0007] In the aforementioned low-cost noise reduction motor, the positioning groove is provided with a slot for circumferential positioning of the rear mounting cover, and the rear mounting cover is fastened and connected in the slot by a locking block.

[0008] In the aforementioned low-cost noise reduction motor, the mounting part is provided with a receiving groove, and one side of the triangular cover is provided with a connector extending into the receiving groove, and a gap is formed between the connector and the receiving groove to allow the triangular cover to move freely.

[0009] In the aforementioned low-cost noise reduction motor, a first fixing hole is formed in the middle of the connector, and a second fixing hole is provided on the rear mounting cover to match the first fixing hole. The fixing component includes a fixing screw that is fastened and connected in the receiving groove. One end of the fixing screw passes through the first fixing hole and the second fixing hole and is connected to a fixing nut. A gap is formed between the fixing screw and the first fixing hole to allow the triangular cover to move freely.

[0010] In the aforementioned low-cost noise reduction motor, the middle part of the triangular cover forms an inwardly recessed limiting groove, and the middle part of the rear mounting cover extends into the limiting groove and forms an annular limiting surface.

[0011] Compared with the prior art, this utility model has the following characteristics:

[0012] (1) By limiting the connection structure of the triangular cover, this utility model enables a gap to be formed between the plastic-coated stator and the rear mounting cover for the horizontal radial movement of the triangular cover. This allows the triangular cover to be adjusted according to the end position of the rotating shaft during installation, thus ensuring the concentricity of the triangular cover and the rotating shaft after they are connected. After the triangular cover is positioned, the connection between the plastic-coated stator and the rear mounting cover allows the triangular cover to be squeezed and fixed from both sides, keeping the triangular cover in a fixed state. The bearing limits the end position of the rotating shaft, thus effectively preventing the radial movement of the rotating shaft and improving the connection stability of the rotating shaft in this utility model.

[0013] (2) By limiting the structure of the fixing component, on the one hand, the fixing screw can avoid the obstruction of the triangular cover during positioning. On the other hand, after the triangular cover is positioned, the fixing nut can be tightened to connect and fix the triangular cover and the rear mounting cover to each other. That is, the rear mounting cover is used to limit the triangular cover, further reducing the possibility of the triangular cover loosening and shifting during the later use of the motor.

[0014] Therefore, this invention can improve the positioning accuracy and connection stability of the rotating shaft, thereby reducing the vibration and noise of the motor during use. Attached Figure Description

[0015] Figure 1 This is the outline drawing of this utility model;

[0016] Figure 2 This is a structural schematic diagram of Example 1;

[0017] Figure 3 yes Figure 2 A magnified view from direction A;

[0018] Figure 4 This is an external view of Example 1 after the mounting cover has been removed;

[0019] Figure 5 It is a diagram of the triangular cap.

[0020] Figure 6 This is a structural schematic diagram of the fixed component position in Embodiment 2.

[0021] The markings in the attached diagram are as follows: 1-Plastic coated stator, 2-Rotor, 3-Shaft, 4-Mounting cover, 5-Triangular cover, 6-Bearing, 7-Mounting part, 8-Positioning groove, 9-Annular limiting surface, 10-Slot, 11-Receiving groove, 12-Connector, 13-Fixing screw, 14-Fixing nut, 15-Limiting groove, 16-Gasket. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0023] Example 1. A low-cost noise-reducing motor, configured as follows: Figure 1-5 As shown, the device includes a plastic-coated stator 1, with a rotor 2 and a rotating shaft 3 connected sequentially to the middle of the plastic-coated stator 1. A rear mounting cover 4 is detachably connected to one end of the plastic-coated stator 1. A triangular cover 5 is provided on the inner side of the rear mounting cover 4. The triangular cover 5 and the rotating shaft 3 are connected to each other via a bearing 6. A mounting part 7 is formed on the plastic-coated stator 1 near the triangular cover 5. The rear mounting cover 4 is fastened to the periphery of the mounting part 7 via positioning grooves 8. The rear mounting cover 4 and the mounting part 7 are used to squeeze and limit the triangular cover 5 after they are connected to each other. An annular limiting surface 9 is provided in the middle of the rear mounting cover 4 for axially limiting the triangular cover 5. There is a gap between the periphery of the triangular cover 5 and the annular limiting surface 9. One end of the triangular cover 5 is detachably connected to the rear mounting cover 4 via a fixing component. The fixing component is used to fix the triangular cover 5 and the rear mounting cover 4 to each other after the triangular cover 5 is positioned.

[0024] The positioning groove 8 is provided with a slot 10 for circumferential positioning of the rear mounting cover 4. The rear mounting cover 4 is fastened in the slot 10 by a locking block, and the locking block and the rear mounting cover 4 are integrally formed.

[0025] The mounting part 7 is provided with a receiving groove 11, and a connector 12 extending into the receiving groove 11 is provided on one side of the triangular cover 5. A gap is formed between the connector 12 and the receiving groove 11 to allow the triangular cover 5 to move freely.

[0026] The middle part of the connector 12 forms a first fixing hole, and the rear mounting cover 4 is provided with a second fixing hole that matches the first fixing hole. The fixing component includes a fixing screw 13 that is fastened and connected in the receiving groove 11. One end of the fixing screw 13 passes through the first fixing hole and the second fixing hole and is connected to a fixing nut 14. A gap is formed between the fixing screw 13 and the first fixing hole to allow the triangular cover 5 to move freely.

[0027] The triangular cover 5 has an inwardly recessed limiting groove 15 in the middle, and the rear mounting cover 4 extends into the limiting groove 15 and forms an annular limiting surface 9 in the middle.

[0028] The rear mounting cover 4 is surrounded by several mounting screws. One end of each mounting screw passes through the plastic-coated stator 1 and is connected to a mounting nut. The mounting screws and mounting nuts are used to connect and fix the rear mounting cover 4 and the plastic-coated stator 1 to each other after tightening, and then press the triangular cover 5 from both sides.

[0029] The working principle of this utility model is as follows: During installation, the fixing screw 13 is first inserted into the receiving groove 11, and then the triangular cover 5 is fitted onto the end of the positioning groove 8, ensuring that the triangular cover 5, the rotating shaft 3, and the bearing 6 are firmly pressed together. During the pressing process, the triangular cover 5 can adjust its position according to the rotating shaft 3, ensuring that the rotating shaft 3 and the triangular cover 5 remain coaxial after connection. After the triangular cover 5 is pressed together, the operator then fastens the mounting cover 4 onto the mounting part 7 via the positioning groove 8 and the locking groove 10, and secures the plastic-coated stator 1 and the mounting cover 4 by tightening the mounting screws and mounting nuts. The plastic-coated stator 1 and the mounting cover 4, after being connected, can press and fix the triangular cover 5, thereby using the triangular cover 5 to fix the end of the rotating shaft 3.

[0030] After the triangular cover 5 is fixed, the operator screws in the fixing nut 14, so that the fixing nut 14 and the fixing screw 13 press and fix the triangular cover 5 and the mounting cover 4 against each other after tightening, thereby achieving the effect of fixing the triangular cover 5 and preventing the triangular cover 5 from loosening or shifting during actual use.

[0031] Example 2. A low-cost noise-reducing motor, configured as follows: Figure 1 and 6As shown, the device includes a plastic-coated stator 1, with a rotor 2 and a rotating shaft 3 connected sequentially to the middle of the plastic-coated stator 1. A rear mounting cover 4 is detachably connected to one end of the plastic-coated stator 1. A triangular cover 5 is provided on the inner side of the rear mounting cover 4. The triangular cover 5 and the rotating shaft 3 are connected to each other via a bearing 6. A mounting part 7 is formed on the plastic-coated stator 1 near the triangular cover 5. The rear mounting cover 4 is fastened to the periphery of the mounting part 7 via positioning grooves 8. The rear mounting cover 4 and the mounting part 7 are used to squeeze and limit the triangular cover 5 after they are connected to each other. An annular limiting surface 9 is provided in the middle of the rear mounting cover 4 for axially limiting the triangular cover 5. There is a gap between the periphery of the triangular cover 5 and the annular limiting surface 9. One end of the triangular cover 5 is detachably connected to the rear mounting cover 4 via a fixing component. The fixing component is used to fix the triangular cover 5 and the rear mounting cover 4 to each other after the triangular cover 5 is positioned.

[0032] The positioning groove 8 is provided with a slot 10 for circumferential positioning of the rear mounting cover 4. The rear mounting cover 4 is fastened in the slot 10 by a locking block, and the locking block and the rear mounting cover 4 are integrally formed.

[0033] The mounting part 7 is provided with a receiving groove 11, and a connector 12 extending into the receiving groove 11 is provided on one side of the triangular cover 5. A gap is formed between the connector 12 and the receiving groove 11 to allow the triangular cover 5 to move freely.

[0034] The connector 12 has a first fixing hole in the middle, and the rear mounting cover 4 has a second fixing hole that matches the first fixing hole. The fixing assembly includes a fixing screw 13 that is fastened and connected in the receiving groove 11. The receiving groove 11 can be used to limit the rotation of the fixing screw 13. One end of the fixing screw 13 passes through the first fixing hole and the second fixing hole and is connected to a fixing nut 14. A gap is formed between the fixing screw 13 and the first fixing hole to allow the triangular cover 5 to move freely.

[0035] The triangular cover 5 has an inwardly recessed limiting groove 15 in the middle, and the rear mounting cover 4 extends into the limiting groove 15 and forms an annular limiting surface 9 in the middle.

[0036] The rear mounting cover 4 is surrounded by several mounting screws. One end of each mounting screw passes through the plastic-coated stator 1 and is connected to a mounting nut. The mounting screws and mounting nuts are used to connect and fix the rear mounting cover 4 and the plastic-coated stator 1 to each other after tightening, and then press the triangular cover 5 from both sides.

[0037] A washer 16 is provided between the mounting cover 4 and the plastic-coated stator 1, which is sleeved on the outside of the fixing screw 13. The fixing nut 14 and the washer 16 are glued together. One end of the washer 16 extends to the outside of the fixing nut 14 and is sleeved on the mounting screw on one side. The upper section of the fixing screw 13 extends to the fixing nut 14 and forms a groove for driving rotation.

[0038] Compared with Embodiment 1, this embodiment limits the structure of the gasket 16 so that the fixing screw 13 and the mounting screw can limit the position of the gasket 16 after installation. Then, after the fixing nut 14 is tightened, the fixing nut 14 is rotated and limited by gluing the fixing nut 14 and the gasket 16 together, thereby improving the fixing effect of the fixing assembly on the triangular cover 5.

[0039] When the triangular cover 5 needs to be disassembled later, the operator only needs to cut the middle of the washer 16 to release the rotation limit on the fixing nut 14, so that the washer 16 can be screwed out together with the fixing nut 14, thus ensuring the disassembly function of this embodiment.

Claims

1. A low-cost noise-reducing motor, comprising a plastic-coated stator (1), wherein a rotor (2) and a shaft (3) are sequentially connected to the middle of the plastic-coated stator (1), and a rear mounting cover (4) is detachably connected to one end of the plastic-coated stator (1), wherein a triangular cover (5) is provided on the inner side of the rear mounting cover (4), and the triangular cover (5) and the shaft (3) are connected to each other via a bearing (6), characterized in that: The plastic-coated stator (1) forms an installation part (7) at one end near the triangular cover (5). The installation part (7) is fastened to the rear installation cover (4) by positioning grooves (8). The rear installation cover (4) and the installation part (7) are used to squeeze and limit the triangular cover (5) after they are connected to each other. The middle part of the rear installation cover (4) is provided with an annular limiting surface (9) for axially limiting the triangular cover (5). There is a gap between the triangular cover (5) and the annular limiting surface (9). One end of the triangular cover (5) is detachably connected to the rear installation cover (4) by a fixing component. The fixing component is used to fix the triangular cover (5) and the rear installation cover (4) to each other after the triangular cover (5) is positioned.

2. The low-cost noise-reducing motor according to claim 1, characterized in that: The positioning groove (8) is provided with a slot (10) for circumferential positioning of the rear mounting cover (4), and the rear mounting cover (4) is fastened in the slot (10) by a locking block.

3. The low-cost noise-reducing motor according to claim 1, characterized in that: The mounting part (7) is provided with a receiving groove (11), and a connector (12) extending into the receiving groove (11) is provided on one side of the triangular cover (5). A gap is formed between the connector (12) and the receiving groove (11) to allow the triangular cover (5) to move freely.

4. A low-cost noise-reducing motor according to claim 3, characterized in that: The connector (12) has a first fixing hole in the middle, and the rear mounting cover (4) has a second fixing hole that matches the first fixing hole. The fixing assembly includes a fixing screw (13) that is fastened in the receiving groove (11). One end of the fixing screw (13) passes through the first fixing hole and the second fixing hole and is connected to a fixing nut (14). A gap is formed between the fixing screw (13) and the first fixing hole to allow the triangular cover (5) to move freely.

5. A low-cost noise-reducing motor according to claim 1, characterized in that: The triangular cover (5) forms an inwardly recessed limiting groove (15) in the middle, and the middle of the rear mounting cover (4) extends into the limiting groove (15) and forms an annular limiting surface (9).

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