Clothes dryer and bidirectional independent output motor module thereof

Abstract

The clothes dryer comprises a shell, a stator assembly and a rotor assembly are arranged in each of two cavities of the shell, the shell comprises an integrated middle shell, an end cover A and an end cover B are fixed to the two ends of the middle shell respectively, and the outer diameter of the stator assembly A is smaller than that of the stator assembly B; a rotor assembly A is arranged on the inner side of the stator assembly A; two ends of a rotating shaft of the rotor assembly A are rotationally connected with the middle shell and the end cover A respectively; the rotor assembly B is arranged on the inner side of the stator assembly B. The two ends of a rotating shaft of the rotor assembly B are rotationally connected with the middle shell and the end cover B. The rotor assembly A and the rotor assembly B are coaxially arranged. And the at least one stator assembly is embedded in the middle shell through an insert molding process. According to the invention, one group or two groups of stator assemblies are directly pre-embedded in the integrated middle shell through insert molding, so that the stator assembly process is reduced, the production efficiency is improved, the coaxiality of the two rotor assemblies is better, the vibration during operation can be reduced, and the noise is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of motors, and in particular relates to a motor module with bidirectional independent output and a clothes dryer using the motor module. Background Art

[0002] With the improvement of living standards, clothes dryers are becoming more and more popular. The performance of the motor in the clothes dryer is related to the performance of the clothes dryer. On the one hand, the current clothes dryer needs to realize the rotational kinetic energy of the drum, and on the other hand, it also needs to introduce a hot air drying system, that is, to blow hot air into the drum through a fan, so as to realize the drying function of the clothes in the drum. In order to realize the above functions, the existing clothes dryer motor includes a motor assembly, the middle part of the motor assembly is connected to the motor shaft, one end of the motor shaft extends to the outside of the motor and is connected to the fan for hot air circulation, and the other end of the motor shaft extends to the outside of the motor and is connected to the dryer drum through a transmission mechanism, so that the clothes dryer motor can be driven by a set of stator and rotor assemblies to control the fan and the dryer drum to rotate at different speeds respectively, so as to realize the drying function.

[0003] However, the defect of this structure is that since there is only one set of stator and rotor assemblies, the two ends of the motor shaft can only operate at the same speed and direction, and when the dryer drum is working, not only the motor speed needs to be adjusted, but also the direction of the motor needs to be controlled, forward and reverse. When the fan is working, only the motor speed needs to be adjusted. Therefore, the working conditions of the existing dryer motor cannot fully meet the needs of the dryer drum and the fan, that is, on the one hand, it is impossible to achieve separate adjustment of the dryer drum or fan speed, and on the other hand, it is impossible to achieve separate control of the dryer drum or fan direction, thereby reducing the functionality and use effect of the dryer. Summary of the invention

[0004] In order to solve the above technical problems, the first object of the present invention is to provide a motor module with two-way independent output, which meets the use requirements of a clothes dryer, is easy to produce and assemble, and has high efficiency. The second object of the present invention is to provide a clothes dryer using the above motor module.

[0005] In order to achieve the above first invention objective, the present invention adopts the following technical solutions:

[0006] A motor module with bidirectional independent output comprises a shell, wherein two chambers are arranged in the shell, each chamber is provided with a stator assembly and a rotor assembly, and the rotating shafts of the two rotor assemblies extend out of the shell to form a transmission part, wherein the shell comprises an integrated middle shell, and end covers A and B are fixed to the two ends of the middle shell respectively, and the two stator assemblies are stator assembly A and stator assembly B respectively, and the outer diameter of the stator assembly A is smaller than that of the stator assembly B; the inner side of the stator assembly A is the rotor assembly A, and the two ends of the rotating shaft of the rotor assembly A are rotatably connected to the middle shell and the end cover A respectively through bearings A; the inner side of the stator assembly B is the rotor assembly B, and the two ends of the rotating shaft of the rotor assembly B are rotatably connected to the middle shell and the end cover B through bearings B, and the rotor assembly A and the rotor assembly B are coaxially arranged; at least one stator assembly is pre-embedded in the middle shell through an insert molding process.

[0007] As a preferred solution, a partition is provided in the middle shell, stepped holes are formed on both sides of the partition, and at least one bearing chamber insert is pre-embedded in the stepped hole. The bearing chamber insert is also directly injection molded in the shell, which can further simplify the assembly process and improve production efficiency.

[0008] As a preferred solution, the bearing chamber insert is provided with a circle of positioning protrusions, and the positioning protrusions of the bearing chamber insert are at least partially buried in the middle shell.

[0009] As a preferred solution, an inner convex edge is provided on the inner wall of one end of the middle shell, one side of the stator assembly A abuts against the inner convex edge, and the end cover A abuts against the other side of the stator assembly A. When one set of stator assemblies is directly injection molded on the middle shell, the other set of stator assemblies uses the end cover and the middle shell to position and assemble the stator assemblies. This method can reduce the mold development cost, and the above positioning structure is simple, firm and reliable.

[0010] As a preferred solution, the middle shell and the end cover A are both made of BMC material, the middle part of the end cover A bulges outward to form a bearing chamber, the bearing chamber is provided with a bearing support, and the stepped hole on the side of the partition facing the rotor assembly A is also provided with a bearing support, and the bearings A at both ends of the rotor assembly A are respectively fixed in the two bearing supports. The middle shell and the end cover A are made of BMC material, which can reduce costs and facilitate the direct injection molding of components such as the stator assembly and the bearing chamber insert in the middle shell, thereby improving production efficiency.

[0011] As a preferred solution, a ring groove is provided on the side wall of the other end of the middle shell, the stator assembly B is pre-buried in the ring groove, and a convex ring is provided on the end surface of the other end of the middle shell, and an end cover B is buckled and fixed on the convex ring.

[0012] As a preferred solution, the end cover B is a metal end cover, and the middle part of the metal end cover bulges outward to form a bearing chamber, the bearing B at one end of the rotor assembly B is fixed in the bearing chamber, the step hole on the side of the partition facing the rotor assembly B is pre-embedded with a bearing chamber insert A, and the bearing B at the other end of the rotor assembly B is fixed in the bearing chamber insert A. The end cover B is made of metal, which can improve the overall strength of the motor module, and the metal end cover can be installed between the bearing, reducing the use of the bearing chamber insert.

[0013] As a preferred solution, the outer wall of the middle shell is stepped, and a plurality of connecting bosses are arranged on the outer wall of the middle shell at equal intervals along the circumference. The middle shell is designed accordingly according to the size of the stator assembly, making the structure more compact, reducing the waste of shell materials, and further reducing costs.

[0014] As a preferred solution, a support arm is extended from one side of the middle shell, a secondary transmission shaft is inserted and fixed in the support arm, a secondary transmission wheel is sleeved on the secondary transmission shaft, the secondary transmission wheel is rotatably connected to the secondary transmission shaft through a bearing, and a pulley is also fixed on the rotating shaft of a rotor assembly, and the pulley is connected to the secondary transmission wheel through a belt drive.

[0015] In order to achieve the above second invention object, the present invention adopts the following technical solution:

[0016] A clothes dryer adopts any of the above-mentioned motor modules with bidirectional independent outputs.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The motor module of the present invention is provided with two sets of stator components and rotor components in the housing, so that each motor module has two transmission parts that can independently control the speed and direction, meeting the use requirements of the dryer. In addition, one or two sets of stator components are directly embedded in the integrated middle housing through insert molding, which not only reduces the stator assembly process and improves production efficiency, but also has better coaxiality of the two rotor components, which can reduce vibration during operation and reduce noise generation. The use of two stator components of different sizes can meet the different power requirements of the dryer drum fan and improve the use efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation on the present application.

[0020] Figure 1 and Figure 2 It is a schematic diagram of the overall structure of the present invention from two different angles;

[0021] Figure 3It is a cross-sectional structural schematic diagram of the present invention;

[0022] Figure 4 and Figure 5 It is a schematic diagram of the explosion structure of the present invention at two different angles;

[0023] Figure 6 and Figure 7 It is a schematic diagram of the structure of the middle shell at two different angles of the present invention.

[0024] Figure 8 It is a cross-sectional schematic diagram of another structure of the present invention.

[0025] The accompanying drawings are marked as follows: 1, middle shell; 11, end cover A; 12, end cover B; 110, stator assembly A; 120, stator assembly B; 2, rotor assembly A; 21, bearing A; 22, bearing support; 3, rotor assembly B; 31, bearing B; 32, bearing chamber insert A; 102, inner convex edge; 103, stepped hole; 105, convex ring; 106, support arm; 4, shock-absorbing ring A; 5, shock-absorbing ring B; 6, secondary transmission wheel; 61, secondary transmission shaft; 7, belt; 8, pulley. DETAILED DESCRIPTION

[0026] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] In addition, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0033] Example 1

[0034] like Figure 1 and Figure 2 The bidirectional independent output motor module shown includes a shell, wherein two chambers are provided in the shell, each chamber is provided with a stator assembly and a rotor assembly, and the rotating shafts of the two rotor assemblies extend out of the shell respectively to form a transmission part, at least one group of stator assemblies are pre-embedded in the shell, and at least one bearing chamber insert is also pre-embedded in the shell.

[0035] The motor module of the present invention arranges two groups of stator assemblies and rotor assemblies in the shell, so that the motor module has two transmission parts that can independently control the rotation speed and direction, thereby meeting the use requirements of the dryer. In addition, one or two groups of stator assemblies are directly injection molded in the shell, which reduces the stator assembly process and improves production efficiency.

[0036] like Figures 3 to 5As shown, the two stator assemblies are stator assembly A110 and stator assembly B120, and the outer diameter of stator assembly A110 is smaller than that of stator assembly B120. The use of two stator assemblies of different sizes can meet the different power requirements of the drum fan of the clothes dryer and improve the efficiency of the motor. In other embodiments, the two stator assemblies can also provide different powers by changing the stacking thickness of the stator assembly.

[0037] The specific structure of the shell in the present invention is as follows: it includes a middle shell 1 and end covers A11 and B12 fixed at both ends of the middle shell 1. A plurality of connecting bosses are also arranged on the outer wall of the middle shell 1 at equal intervals along the circumference. The connecting bosses are provided with threaded holes. One end of the middle shell is connected and fastened with the threaded holes of the corresponding connecting bosses after passing through the end cover A11 by bolts, and the other end of the middle shell is also connected and fastened with the threaded holes of the corresponding connecting bosses after passing through the end cover B12 by bolts. The outer wall of the middle shell 1 is stepped, and the middle shell is designed accordingly according to the size of the stator assembly, so that the structure is more compact, the waste of shell materials is reduced, and the cost is further reduced.

[0038] like Figure 6 and Figure 7 As shown, the middle shell is integrally formed, and at least one stator assembly is embedded in the middle shell by an insert molding process; a partition is provided in the middle shell, and stepped holes 103 are formed on both sides of the partition, and at least one bearing chamber insert is embedded in the stepped hole 103. The bearing chamber insert is provided with a circle of positioning convex edges, and the positioning convex edges of the bearing chamber insert are at least partially embedded in the middle shell.

[0039] The stepped holes 103 on both sides are interconnected, which facilitates the formation of the stepped holes on both sides during the production of the middle shell, while also ensuring the coaxiality of the stepped holes, thereby improving the coaxiality of the two rotor assemblies, and is beneficial to reducing the vibration of the motor working chamber and reducing noise generation; in other embodiments, the stepped holes on both sides of the partition may also be unconnected blind holes.

[0040] An inner wall of the cavity in the middle shell 1 on one side of the partition is provided with an inner convex edge 102, one side of the stator assembly A110 abuts against the inner convex edge, and the end cover A11 abuts against the other side of the stator assembly A110.

[0041] The inner side of the stator assembly A110 is the rotor assembly A2, and the two ends of the rotating shaft of the rotor assembly A2 are rotatably connected to the middle shell 1 and the end cover A11 through bearings A21. The end cover A11 is also made of BMC material, and the middle part of the end cover A11 protrudes outward to form a bearing chamber, and the bearing chamber is provided with a bearing support 22. The stepped hole 103 on the side of the partition facing the rotor assembly A2 is also provided with a bearing support 22, and the bearings A21 at both ends of the rotor assembly A2 are fixed in the two bearing supports 22 respectively.

[0042] An annular groove is provided on the side wall of the other end of the middle shell 1, and the stator assembly B120 is pre-buried in the annular groove, and a convex ring 105 is provided on the end surface of the other end of the middle shell 1, and an end cover B11 is buckled and fixed on the convex ring 105. The inner side of the stator assembly B120 is the rotor assembly B3, and the two ends of the rotating shaft of the rotor assembly B3 are rotatably connected to the middle shell 1 and the end cover B12 through bearings B31.

[0043] The end cover B12 is a metal end cover, and the middle part of the metal end cover bulges outward to form a bearing chamber. The bearing B31 at one end of the rotor assembly B3 is fixed in the bearing chamber. The step hole 103 on the side of the partition facing the rotor assembly B3 is pre-embedded with a bearing chamber insert A32. The bearing B31 at the other end of the rotor assembly B3 is fixed in the bearing chamber insert A32. The end cover B is made of metal material, which can improve the overall strength of the motor module. At the same time, the metal end cover can be installed between the bearing, reducing the use of bearing chamber inserts.

[0044] During production, the middle shell 1 is formed of a bulk molding compound (BMC), which is overmolded around the stator assembly B120 and the bearing chamber insert A32. The middle shell and the end cover A are made of BMC material, which can reduce costs and facilitate the direct injection molding of components such as the stator assembly and the bearing chamber insert in the middle shell, thereby improving production efficiency.

[0045] In other embodiments, two sets of stator assemblies, bearing chamber inserts, and bearing supports may be pre-buried in the middle shell for production (eg Figure 8 As shown), the coaxiality of the two groups of stator assemblies, as well as the coaxiality of the bearing chamber inserts and the bearing supports are ensured, thereby improving the coaxiality of the two groups of rotor assemblies, making the motor vibrate less during operation and further reducing noise; however, this method has high requirements for mold development. In this embodiment, a group of stator assemblies and a bearing chamber insert are pre-embedded to produce the middle shell 1, and the other group of stator assemblies uses the end cover and the middle shell to position and assemble the stator assemblies. This method can reduce the mold development cost, and the above-mentioned positioning structure is simple, firm, reliable, and easy to assemble.

[0046] In this embodiment, a support arm 106 is extended from one side of the middle shell 1, a secondary transmission shaft 61 is inserted and fixed in the support arm 106, a secondary transmission wheel 6 is sleeved on the secondary transmission shaft 61, the secondary transmission wheel 6 is rotatably connected to the secondary transmission shaft 61 through a bearing, a pulley 8 is also fixed on the rotating shaft of a rotor assembly, and the pulley 8 is connected to the secondary transmission wheel 6 through a belt 7. Shock-absorbing rings A4 and B5 are sleeved on the end caps A11 and B12, respectively.

[0047] Example 2

[0048] A clothes dryer adopts any of the above described two-way independent output motor modules. One end of the motor module is connected to the fan via a transmission device, and the other end of the motor module is connected to the dryer drum via a secondary transmission wheel 6. The clothes dryer also includes a control module, the outside of which is respectively connected to two groups of stator assemblies. When in use, the control module sends instructions to the two groups of stator assemblies respectively, and under the control of the control module, the rotating shafts of the two groups of rotor assemblies are respectively driven to rotate at corresponding speeds and directions.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0050] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A motor module with bidirectional independent output, comprising a housing, wherein two chambers are provided in the housing, each chamber is provided with a stator assembly and a rotor assembly, and the rotating shafts of the two rotor assemblies extend out of the housing to form a transmission part, characterized in that: The housing comprises an integrated middle shell (1), the two ends of the middle shell (1) are respectively fixed with an end cover A (11) and an end cover B (12), two stator assemblies are respectively a stator assembly A (110) and a stator assembly B (120), the outer diameter of the stator assembly A (110) is smaller than that of the stator assembly B (120); the inner side of the stator assembly A (110) is a rotor assembly A (2), the two ends of the rotating shaft of the rotor assembly A (2) are rotatably connected to the middle shell (1) and the end cover A (11) through bearings A (21); the inner side of the stator assembly B (120) is a rotor assembly B (3), the two ends of the rotating shaft of the rotor assembly B (3) are rotatably connected to the middle shell (1) and the end cover B (12) through bearings B (31), and the rotor assembly A (2) and the rotor assembly B (3) are coaxially arranged; at least one stator assembly is pre-embedded in the middle shell (1) through an insert molding process.

2. The motor module with bidirectional independent output according to claim 1, characterized in that: A partition is provided in the middle shell, and stepped holes (103) are formed on both sides of the partition. At least one bearing chamber insert is pre-embedded in the stepped hole (103).

3. The motor module with bidirectional independent output according to claim 2, characterized in that: The bearing chamber insert is provided with a circle of positioning protrusions, and the positioning protrusions of the bearing chamber insert are at least partially buried in the middle shell (1).

4. The motor module with bidirectional independent output according to claim 1, characterized in that: An inner convex edge (102) is provided on the inner wall of one end of the middle shell (1), one side of the stator assembly A (110) abuts against the inner convex edge, and the end cover A (11) abuts against the other side of the stator assembly A (110).

5. The motor module with bidirectional independent output according to claim 1, characterized in that: The middle shell (1) and the end cover A (11) are both made of BMC material. The middle part of the end cover A (11) protrudes outward to form a bearing chamber. The bearing chamber is provided with a bearing support member (22). The stepped hole (103) on the side of the partition plate facing the rotor assembly A (2) is also provided with a bearing support member (22). The bearings A (21) at both ends of the rotor assembly A (2) are respectively fixed in the two bearing support members (22).

6. The motor module with bidirectional independent output according to claim 1, characterized in that: A ring groove is provided on the side wall of the other end of the middle shell (1), the stator assembly B (120) is pre-buried in the ring groove, and a convex ring (105) is provided on the end surface of the other end of the middle shell (1), and an end cover B (11) is buckled and fixed on the convex ring (105).

7. The motor module with bidirectional independent output according to claim 5, characterized in that: The end cover B (12) is a metal end cover, and the middle part of the metal end cover protrudes outward to form a bearing chamber. The bearing B (31) at one end of the rotor assembly B (3) is fixed in the bearing chamber. A bearing chamber insert A (32) is pre-buried in the stepped hole (103) on the side of the partition plate facing the rotor assembly B (3), and the bearing B (31) at the other end of the rotor assembly B (3) is fixed in the bearing chamber insert A (32).

8. The motor module with bidirectional independent output according to claim 1, characterized in that: The outer wall of the middle shell (1) is in a stepped shape, and a plurality of connecting bosses are arranged on the outer wall of the middle shell (1) at equal intervals along the circumference.

9. The motor module with bidirectional independent output according to claim 2, characterized in that: A support arm (106) is extended from one side of the middle shell (1), a secondary transmission shaft (61) is inserted and fixed in the support arm (106), a secondary transmission wheel (6) is sleeved on the secondary transmission shaft (61), the secondary transmission wheel (6) is rotatably connected to the secondary transmission shaft (61) via a bearing, and a pulley (8) is also fixed on the rotating shaft of a rotor assembly, and the pulley (8) is connected to the secondary transmission wheel (6) via a belt (7).

10. A clothes dryer, characterized in that A motor module with bidirectional independent output as described in any one of claims 1 to 9 is used.

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