Dual-rotor motor structure for a clothes dryer

Abstract

The utility model discloses a double rotor motor structure for clothes dryer, including stator subassembly (1), outer rotor subassembly (2) and inner rotor subassembly (3), one side of stator subassembly (1) is connected with fixed frame (4), and inner rotor subassembly (3) is located the radial inboard of stator subassembly (1) and is connected with motor shaft (5), and outer rotor subassembly (2) is located the radial outside of stator subassembly (1) and is connected with rotating frame (6), and one side of rotating frame (6) is connected with drive wheel (7), the outside of fixed frame (4) is connected with mounting bracket (8), and one end of mounting bracket (8) extends to the radial outside of drive wheel (7) and is connected with the follower wheel (9) of cooperation drive wheel (7), and drive wheel (7) and follower wheel (9) are transmission connection between. The utility model can shorten the length size of clothes dryer motor along the axial direction, thereby reduces the space occupancy of clothes dryer motor.

Description

Technical Field

[0001] This utility model relates to a dryer motor, and more particularly to a dual-rotor motor structure for a dryer. Background Technology

[0002] Traditional clothes dryers require two separate drive motors to operate the dryer drum and fan, each driving one component independently. This increases the internal space required and production costs. To address this drawback, some manufacturers have improved the motor structure, as shown in patent 202411476652.2. By installing two sets of stator and rotor assemblies within a single motor housing, each set can drive a separate motor shaft, thus enabling independent operation of the dryer drum and fan.

[0003] However, the aforementioned dryer motor has a drawback: because its two motor shafts need to be driven independently by two sets of stator and rotor assemblies, these assemblies must be spaced apart along the motor's axial direction during installation to prevent them from obstructing each other. This inevitably increases the space occupied by the motor along its axial direction. Compared to existing motors, this design only saves space by reducing the size of the motor housing; the drive structure of the two stator and rotor assemblies remains, thus failing to minimize the space occupied by the dryer motor.

[0004] Therefore, existing dryer motors have the problem of taking up a lot of space. Utility Model Content

[0005] The purpose of this invention is to provide a dual-rotor motor structure for a clothes dryer. This structure shortens the axial length of the dryer motor, thereby reducing its space requirements.

[0006] The technical solution of this utility model: a dual-rotor motor structure for a clothes dryer, including a stator assembly, an outer rotor assembly, and an inner rotor assembly. A fixed frame is connected to one side of the stator assembly. The inner rotor assembly is located radially inside the stator assembly and is connected to a motor shaft. The outer rotor assembly is located radially outside the stator assembly and is connected to a rotating frame. A drive wheel is connected to one side of the rotating frame. A mounting bracket is connected to the outer side of the fixed frame. One end of the mounting bracket extends radially outside the drive wheel and is connected to a driven wheel that cooperates with the drive wheel. The drive wheel and the driven wheel are connected by a transmission.

[0007] In the aforementioned dual-rotor motor structure for a clothes dryer, the inner side of the drive wheel is rotatably connected to a support shaft via a first bearing. One end of the support shaft is fixedly connected to a stator assembly, and the other end of the support shaft extends to the outer side of the drive wheel and is connected to a first support member.

[0008] In the aforementioned dual-rotor motor structure for a clothes dryer, the mounting bracket forms an outwardly protruding step on the side away from the fixed frame, and a second support member is connected to the outer side of the step.

[0009] In the aforementioned dual-rotor motor structure for a clothes dryer, the stator assembly includes an inner stator core and an outer stator core. The inner stator core and the outer stator core are arranged radially at intervals. The inner stator core and the outer stator core are interconnected via a stator frame. The inner stator winding and the outer stator winding are respectively connected to the inner and outer sides of the stator frame. The stator frame, the inner stator winding, and the outer stator winding are covered with a plastic coating layer. The plastic coating layer forms a fixing frame on the side near the mounting bracket, and the plastic coating layer is fixedly connected to a support shaft on the side away from the mounting bracket.

[0010] In the aforementioned dual-rotor motor structure for a clothes dryer, a partition is formed in the middle of the stator frame, and the inner stator core and the outer stator core are separated from each other by the partition.

[0011] In the aforementioned dual-rotor motor structure for a clothes dryer, the outer side of the motor shaft on one side of the inner rotor assembly is connected to a plastic coating layer via a second bearing, and the outer side of the motor shaft on the other side of the inner rotor assembly is connected to a plastic coating layer via a third bearing.

[0012] In the aforementioned dual-rotor motor structure for a clothes dryer, the plastic coating layer is fixedly connected to a bearing end cap on the side near the third bearing, and the inner side of the bearing end cap is fastened to the third bearing.

[0013] In the aforementioned dual-rotor motor structure for a clothes dryer, the motor shaft passes through the fixed frame and the mounting bracket in sequence at the end near the fixed frame and extends to the outside.

[0014] In the aforementioned dual-rotor motor structure for a clothes dryer, the mounting bracket is PBT injection molded, and the mounting bracket and the fixing frame are connected to each other by bolts.

[0015] Compared with the prior art, this utility model has the following characteristics:

[0016] (1) Through the structural cooperation of the stator assembly, the outer rotor assembly and the inner rotor assembly, the stator assembly can drive the outer rotor assembly and the inner rotor assembly on the inner and outer sides to rotate, thereby realizing the individual control of the motor shaft and the drive wheel; under the above cooperation, the stator assembly, the outer rotor assembly and the inner rotor assembly can be arranged alternately in the radial direction, and compared with the existing dryer motor, the number of stator assemblies can be reduced from two sets to one set, thereby effectively shortening the axial length of the dryer motor and reducing the space occupied by the dryer motor;

[0017] (2) Based on the above, by limiting the structure of the stator assembly, the inner and outer sides of the stator assembly can be driven separately by the cooperation of the inner stator core, the outer stator core, the inner stator winding and the outer stator winding, and the two are separated by the partition in the middle of the stator frame, thereby avoiding mutual interference between the two magnetic fields and improving the driving stability of this utility model.

[0018] (3) By connecting the rotating frame, the fixed frame, the drive wheel, the motor shaft and the support shaft, the rotating frame can also serve as the motor housing and rotate with the drive wheel. Meanwhile, the two sides of the dryer motor are fixed to the external dryer frame by the support shaft and the mounting bracket, thereby ensuring the fixing effect of this utility model while further reducing its space occupation.

[0019] Therefore, this invention can shorten the axial length of the dryer motor, thereby reducing the space occupied by the dryer motor. Attached Figure Description

[0020] Figure 1 This is the outline drawing of this utility model;

[0021] Figure 2 This is a cross-sectional view of the present invention;

[0022] Figure 3 This is a schematic diagram of the stator assembly;

[0023] Figure 4 yes Figure 3 A schematic diagram of the structure after the plastic coating layer has been removed;

[0024] Figure 5 yes Figure 4 A schematic diagram of the structure after removing one side of the stator frame.

[0025] The labels in the attached diagram are as follows: 1-Stator assembly, 2-Outer rotor assembly, 3-Inner rotor assembly, 4-Fixed frame, 5-Motor shaft, 6-Rotating frame, 7-Drive wheel, 8-Mounting bracket, 9-Driven wheel, 10-Support shaft, 11-First support member, 12-Step section, 13-Second support member, 14-Second bearing, 15-Third bearing, 16-Bearing end cover, 101-Inner stator core, 102-Outer stator core, 103-Stator frame, 104-Plastic coating layer, 105-Partition plate. Detailed Implementation

[0026] 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.

[0027] Example. A dual-rotor motor structure for a clothes dryer, configured as follows: Figure 1As shown, the motor includes a stator assembly 1, an outer rotor assembly 2, and an inner rotor assembly 3 arranged concentrically. A fixed frame 4 is connected to one side of the stator assembly 1. The inner rotor assembly 3 is located radially inside the stator assembly 1 and is connected to a motor shaft 5. The motor shaft 5 and the inner rotor assembly 3 are nested and connected in a transmission manner. The outer rotor assembly 2 is located radially outside the stator assembly 1 and is connected to a rotating frame 6. A drive wheel 7 is connected to one side of the rotating frame 6. A mounting bracket 8 is connected to the outer side of the fixed frame 4. The mounting bracket 8 and the drive wheel 7 are located on the left and right sides of the stator assembly 1 along the axial direction of the dual rotor motor, respectively. One end of the mounting bracket 8 extends from the outside of the rotating frame 6 to the radial outside of the drive wheel 7 and is connected to a driven wheel 9 that cooperates with the drive wheel 7. The drive wheel 7 and the driven wheel 9 are connected in a transmission mechanism via a belt drive.

[0028] The drive wheel 7 is connected to the dryer drum via a belt drive mechanism.

[0029] The outer rotor assembly 2 uses a rotating frame 6 as the outer rotor skeleton and connects to the rotor magnet. The rotor magnet is located on the radially outer side of the stator assembly 1 and is distributed in a ring around the inner wall of the rotating frame 6. The end of the rotating frame 6 extends to one axial side of the stator assembly 1 and is connected to the drive wheel 7.

[0030] The inner side of the drive wheel 7 is rotatably connected to a support shaft 10 via a first bearing. One end of the support shaft 10 is fixedly connected to the stator assembly 1, and the other end of the support shaft 10 extends to the outer side of the drive wheel 7 and is connected to a first support member 11.

[0031] The mounting bracket 8 forms an outwardly protruding step 12 on the side away from the fixed frame 4. A second support member 13 is connected to the outside of the step 12. The first support member 11 and the second support member 13 are both commonly used support members for dryer motors. Specifically, plastic connectors or injection-molded rubber sleeves can be selected.

[0032] The two ends of the dual rotor motor are placed in the mounting slots of the dryer frame via the first support member 11 and the second support member 13, respectively.

[0033] The motor shaft 5 and the support shaft 10 are coaxially arranged and distributed at intervals along the axial direction of the dual rotor motor on the left and right sides of the dual rotor motor.

[0034] The stator assembly 1 includes an inner stator core 101 and an outer stator core 102. The inner stator core 101 and the outer stator core 102 are arranged radially at an inner-outer interval. The inner stator core 101 and the outer stator core 102 are connected to each other via a stator frame 103. The inner stator winding and the outer stator winding are respectively connected to the inner and outer sides of the stator frame 103. The inner stator winding is wound around the outside of the stator teeth of the inner stator core 101, and the outer stator winding is wound around the outside of the stator teeth of the outer stator core 102. The stator frame 103, the inner stator winding, and the outer stator winding are covered with a plastic coating layer 104. The plastic coating layer 104 forms a fixing frame 4 on the side near the mounting bracket 8, and the plastic coating layer 104 is fixedly connected to the support shaft 10 on the side away from the mounting bracket 8.

[0035] The stator frame 103 is formed by two split frames that are interlocked together. A partition 105 is formed in the middle of the stator frame 103. The inner stator core 101 and the outer stator core 102 are separated from each other by the partition 105. The partition 105 can prevent magnetic field interference between the inner stator core 101 and the outer stator core 102.

[0036] The stator frame 103 has several injection holes distributed around its perimeter. The inner stator core 101 and the outer stator core 102 are provided with grooves that match the injection holes, so that the injection holes completely penetrate the thickness direction of the stator frame 103. The plastic coating layer 104 extends to the left and right sides of the stator assembly 1 through the injection holes.

[0037] The motor shaft 5 on one side of the inner rotor assembly 3 is connected to the plastic coating layer 104 via the second bearing 14, and the motor shaft 5 on the other side of the inner rotor assembly 3 is connected to the plastic coating layer 104 via the third bearing 15.

[0038] The plastic coating layer 104 has a bearing end cap 16 fixedly connected to the side near the third bearing 15, and the inner side of the bearing end cap 16 is fastened to the third bearing 15.

[0039] The motor shaft 5 passes through the fixed frame 4 and the mounting bracket 8 in sequence at the end near the fixed frame 4 and is connected to the dryer fan located outside the dual rotor motor.

[0040] The mounting bracket 8 is PBT injection molded, and the mounting bracket 8 and the fixing frame 4 are connected to each other by bolts.

[0041] The working principle of this utility model is as follows: By connecting the support shaft 10 and the motor shaft 5 to both sides of the plastic coating layer 104, the outer rotor assembly 2 and the inner rotor assembly 3 can be interconnected and formed based on the plastic coating layer 104. Through the cooperation of the first support member 11 and the second support member 13, the two ends of the dryer motor can be positioned, thereby achieving stable installation of the dryer motor within the dryer frame.

[0042] In operation, the inner rotor assembly 3 is driven to rotate by the cooperation of the inner stator core 101 and the inner stator winding. After rotating, the inner rotor assembly 3 drives the external dryer fan to rotate via the motor shaft 5, thus driving the dryer fan to rotate. Simultaneously, the outer rotor assembly 2 is driven to rotate by the cooperation of the outer stator core 102 and the outer stator winding. After rotating, the outer rotor assembly 2 drives the drive wheel 7 to rotate synchronously via the rotating frame 6. The drive wheel 7 then drives the driven wheel 9 to rotate via a belt, so that the driven wheel 9 can drive the dryer drum to rotate, thus driving the dryer drum to rotate.

[0043] With the above-mentioned coordination, the present invention can control the rotation of the outer rotor assembly 2 and the inner rotor assembly 3 through the stator assembly 1, and realize the alternating inner and outer distribution of the stator assembly 1, the outer rotor assembly 2 and the inner rotor assembly 3 in the radial direction of the motor, thereby effectively shortening the overall length of the motor and reducing the space occupied by the motor.

Claims

1. A dual-rotor motor structure for a clothes dryer, characterized in that: The device includes a stator assembly (1), an outer rotor assembly (2), and an inner rotor assembly (3). A fixed frame (4) is connected to one side of the stator assembly (1). The inner rotor assembly (3) is located on the radial inner side of the stator assembly (1) and is connected to a motor shaft (5). The outer rotor assembly (2) is located on the radial outer side of the stator assembly (1) and is connected to a rotating frame (6). A drive wheel (7) is connected to one side of the rotating frame (6). A mounting bracket (8) is connected to the outer side of the fixed frame (4). One end of the mounting bracket (8) extends to the radial outer side of the drive wheel (7) and is connected to a driven wheel (9) that cooperates with the drive wheel (7). The drive wheel (7) and the driven wheel (9) are connected by a transmission.

2. The dual-rotor motor structure for a clothes dryer according to claim 1, characterized in that: The inner side of the drive wheel (7) is rotatably connected to a support shaft (10) via a first bearing. One end of the support shaft (10) is fixedly connected to the stator assembly (1), and the other end of the support shaft (10) extends to the outer side of the drive wheel (7) and is connected to a first support member (11).

3. The dual-rotor motor structure for a clothes dryer according to claim 1, characterized in that: The mounting bracket (8) forms an outwardly protruding step (12) on the side away from the fixing frame (4), and a second support member (13) is connected to the outside of the step (12).

4. The dual-rotor motor structure for a clothes dryer according to claim 1, characterized in that: The stator assembly (1) includes an inner stator core (101) and an outer stator core (102). The inner stator core (101) and the outer stator core (102) are arranged radially at intervals. The inner stator core (101) and the outer stator core (102) are connected to each other via a stator frame (103). The inner and outer sides of the stator frame (103) are respectively connected to the inner stator winding and the outer stator winding. The stator frame (103), the inner stator winding and the outer stator winding are wrapped with a plastic coating layer (104). The plastic coating layer (104) forms a fixing frame (4) on the side close to the mounting bracket (8). The plastic coating layer (104) is fixedly connected to the support shaft (10) on the side away from the mounting bracket (8).

5. The dual-rotor motor structure for a clothes dryer according to claim 4, characterized in that: A partition (105) is formed in the middle of the stator frame (103), and the inner stator core (101) and the outer stator core (102) are separated from each other by the partition (105).

6. The dual-rotor motor structure for a clothes dryer according to claim 4, characterized in that: The motor shaft (5) on one side of the inner rotor assembly (3) is connected to the plastic coating layer (104) via a second bearing (14), and the motor shaft (5) on the other side of the inner rotor assembly (3) is connected to the plastic coating layer (104) via a third bearing (15).

7. The dual-rotor motor structure for a clothes dryer according to claim 6, characterized in that: The plastic coating layer (104) has a bearing end cap (16) fixedly connected to the side near the third bearing (15), and the inner side of the bearing end cap (16) is fastened to the third bearing (15).

8. The dual-rotor motor structure for a clothes dryer according to claim 6, characterized in that: The motor shaft (5) passes through the fixed frame (4) and the mounting bracket (8) in sequence at the end near the fixed frame (4) and extends to the outside.

9. The dual-rotor motor structure for a clothes dryer according to claim 1, characterized in that: The mounting bracket (8) is PBT injection molded, and the mounting bracket (8) and the fixing bracket (4) are connected to each other by bolts.

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