Washing machine driving device and washing machine

Abstract

The invention discloses a washing machine driving device and a washing machine, the washing machine driving device comprises a first driving unit and a second driving unit, the first driving unit is used for driving an input shaft sleeve to rotate; the second driving unit is arranged on the periphery of the first driving unit and used for driving the input shaft to rotate, and the input shaft is coaxially arranged in the input shaft sleeve; and the shell is arranged outside the first driving unit and is used for isolating the first driving unit from the second driving unit. A housing surrounds the first drive unit and an input sleeve rotatably passes through the housing. The washing machine comprises an inner barrel and an impeller, the inner barrel and an input shaft sleeve are connected and rotate together, and the impeller and an input shaft are connected and rotate together. The stators of the two driving units are isolated through the shell, so that mutual electromagnetic interference can be reduced, respective heat dissipation can be isolated, and influence of heat accumulation on respective operation efficiency is avoided.

Description

Technical Field

[0001] The invention relates to the field of washing machines, in particular to a washing machine driving device and a washing machine having two sets of driving units which do not interfere with each other. Background Art

[0002] In a conventional fully automatic washing machine with a dehydration function, an inner barrel, which serves as a washing barrel and a dehydration barrel, is rotatably disposed in an outer barrel, and a pulsator is also rotatably disposed at the bottom of the inner barrel. The pulsator and the inner barrel are driven to rotate by a motor, so that when the washing operation is in progress, the pulsator is driven to rotate in a state where the inner barrel is braked and stopped, and is reversed at a relatively low speed to achieve agitation washing. When the dehydration operation is in progress, the inner barrel and the pulsator are driven to rotate without deceleration by releasing the brake on the inner barrel, so that both rotate at a high speed to achieve centrifugal dehydration.

[0003] In order to realize the conversion of the rotational driving force transmission path of the motor as mentioned above, a deceleration clutch device needs to be provided in the rotational driving force transmission path from the motor to the inner barrel and the impeller. Therefore, not only does it occupy the space at the bottom of the outer barrel of the washing machine, thereby increasing the height of the washing machine, or reducing the washing volume because the height of the barrel needs to be lowered when the height of the washing machine remains the same, but it also makes the structure quite complicated, thereby reducing the efficiency of manufacturing and assembly, and ultimately increasing the manufacturing cost. In addition, due to the manufacturing precision or long-term heating of the clutch mechanism, the control circuit transmission path conversion action is not smooth, resulting in unstable conversion reliability.

[0004] In particular, when switching from washing mode to dehydration mode, there are noise problems such as the sound produced by the switching action of the clutch mechanism, the change in gear rotation speed in the deceleration mechanism during the washing mode, and the mechanical sound generated by the transmission.

[0005] The traditional fully automatic washing machine also includes a motor for driving the clutch working state conversion, and selectively transmits power to the washing shaft and the dehydration shaft. Therefore, it is impossible to independently drive the inner tub and the impeller at the same time, and thus there is a problem that multiple washing water flows cannot be formed. Although the applicant later conducted further research and development and designed a dual-power washing machine that can control the inner tub and the impeller to rotate in the forward and reverse directions under the washing working state to form a dual-power washing water flow, it is still necessary to realize the two-way forward and reverse output of the motor power through the reduction clutch device to drive the impeller and the inner tub to rotate forward and reversely, and the defects caused by the above-mentioned setting of the reduction clutch device still exist.

[0006] In addition, in conventional fully automatic washing machines and improved dual-power washing machines, a single motor is used to perform the washing stroke with low speed and high torque characteristics and the dehydration stroke with high speed and low torque characteristics. Therefore, there is still the problem that the motor design cannot be optimized for each stroke. Finally, the motor optimized for the washing stroke is designed, and the so-called weak magnetic field control is implemented in the dehydration stroke to solve the high-speed rotation problem during the dehydration stroke, making the control sequence more complicated.

[0007] As a solution to the above problem, Chinese Patent Application No. CN200510087919.X discloses a washing machine which removes a speed reduction clutch device and uses a dual-rotor motor.

[0008] In the above-mentioned washing machine, the washing motor is an outer rotor type having a larger diameter than the dehydrating motor, and the dehydrating motor is an inner rotor type, the washing motor is located on the outside, and the dehydrating motor is located on the inside.

[0009] That is, the washing motor is an outer rotor type, and its diameter is larger than that of the dehydrating motor, and the stator driving the inner and outer rotors to rotate is arranged between the inner and outer rotors. The stator includes a stator core, an inner winding part and an outer winding part, and each winding part has a coil wound on the stator core. The inner winding part is arranged on the inner side of the stator, and the outer winding part is arranged on the outer side of the stator.

[0010] In particular, during the washing process of the above-mentioned washing machine, the coils of the inner winding part and the outer winding part are energized to drive the inner tub and the pulsator to rotate respectively to obtain a strong washing water flow. However, since there is no gap between the coils of the inner winding part and the outer winding part, the magnetic fields generated by the current passing through are easy to interfere with each other, and the heat generated by the work is also easy to affect each other, so that the working efficiency is reduced, especially in a large-capacity washing machine, it is difficult to form a variety of washing water flows using high torque.

[0011] In view of this, the present invention is proposed. Summary of the invention

[0012] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a washing machine driving device which is provided with two isolated motors to reduce mutual interference.

[0013] Another object of the present invention is to provide a washing machine having the driving device.

[0014] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a washing machine driving device, comprising:

[0015] A first driving unit, used for driving the input shaft sleeve to rotate;

[0016] A second driving unit is arranged on the outer periphery of the first driving unit and is used to drive the input shaft to rotate, and the input shaft is coaxially arranged in the input shaft sleeve;

[0017] The housing is arranged outside the first driving unit and is used to isolate the first driving unit from the second driving unit.

[0018] Further, the housing surrounds the first driving unit, and the input shaft sleeve rotatably passes through the housing.

[0019] Furthermore, a bearing chamber for installing a bearing is formed between the housing and the input shaft sleeve, the inner ring of the bearing is sleeved on the outer periphery of the input shaft sleeve, and the outer ring of the bearing is embedded in the bearing chamber.

[0020] Alternatively, the above-mentioned alternative solution is that the input shaft sleeve is provided with a bearing, the bearing is installed in a bearing housing, and the outer housing is connected to the bearing housing.

[0021] Furthermore, the first driving unit includes,

[0022] A first rotor connected to the input sleeve and rotating together with the input sleeve;

[0023] The first stator is arranged on the outer periphery of the first rotor in a manner of forming a gap with the first rotor and connected to the inner wall of the housing;

[0024] The second driving unit comprises,

[0025] A second rotor connected to the input shaft and rotating together with the input shaft;

[0026] The second stator is arranged on the inner periphery of the second rotor so as to form a gap with the second rotor, and is connected to the outer wall of the casing.

[0027] Further, the housing comprises,

[0028] A first housing shell, one end of which is provided with a first bearing between the first end and the input shaft sleeve, and the other end of which is open;

[0029] A second housing shell, one end of which is provided with a second bearing between the second bearing and the input shaft sleeve, and the other end of which is open;

[0030] The opening end of the first cover shell is butted against the opening end of the second cover shell, forming an installation space of the shell inside, and the first stator is fixed in the installation space of the shell.

[0031] Furthermore, the first stator is clamped and fixed in the installation space of the outer shell by the first cover shell and the second cover shell.

[0032] Furthermore, the first stator includes an iron core, a winding, and an annular body encapsulating the iron core and the winding. The outer peripheral wall of the annular body has a convex ring extending outward, and the first cover shell and the second cover shell clamp the convex ring.

[0033] Furthermore, at least one inner wall of the first housing and the second housing is provided with a clamping portion for clamping the first stator, and the clamping portion is spaced apart from the end of the opening;

[0034] Preferably, the inner wall of one of the first and second housings is provided with a clamping portion, and the end surface of the opening end of the other housing protrudes from the inner wall of the housing with the clamping portion in the installation space, and the end surface protruding from the inner wall of the housing with the clamping portion cooperates with the clamping portion to clamp the first stator;

[0035] Alternatively, the inner walls of the first cover shell and the second cover shell are both provided with clamping parts for clamping the first stator, and the two clamping parts cooperate to clamp the first stator.

[0036] Furthermore, at least one cover shell is provided with at least two circumferential walls with different inner diameters in a direction extending from the opening end to one end in the opposite direction, including a first circumferential wall constituting the opening end and a second circumferential wall adjacent to the first circumferential wall, the inner diameter of the first circumferential wall is greater than the inner diameter of the second circumferential wall, and a transition section step is formed at the connection between the inner wall of the first circumferential wall and the inner wall of the second circumferential wall, and the transition section step constitutes the clamping portion.

[0037] Furthermore, mounting ears are protruding from the outer walls of the opening ends of the first cover shell and the second cover shell, respectively, and the first cover shell and the second cover shell are fixedly connected by bolts passing through the mounting ears.

[0038] Furthermore, the second stator is provided with a mounting hole, and the second stator is fixed to the outside of the housing by bolts passing through the mounting ears and connecting with the mounting holes, or the second stator is fixed to the outside of the housing by bolts passing through the mounting holes and connecting with the mounting ears.

[0039] Alternatively, the second stator can be fixed to the outside of the housing by means of bolts passing through the mounting ears and mounting holes and then being screwed together with nuts.

[0040] Furthermore, the second stator includes an iron core, a winding, and an annular body that encapsulates the iron core and the winding, and also includes a mounting portion, which is arranged on the inner circumference of the annular body and connected to the inner wall of the annular body. The mounting portion is connected to the outer shell, and the mounting hole is a threaded hole, which is axially arranged on the mounting portion.

[0041] Furthermore, the first stator and the first cover shell or the second cover shell are an integral structure.

[0042] Furthermore, the second stator and the second cover shell or the first cover shell are an integral structure.

[0043] Furthermore, the first cover shell and / or the second cover shell are provided with penetrating heat dissipation holes.

[0044] The present invention provides a washing machine, comprising:

[0045] Inner barrel;

[0046] A pulsator is rotatably mounted in the inner barrel;

[0047] In the above-mentioned washing machine driving device, the inner drum is connected to the input shaft sleeve and rotates together, and the impeller is connected to the input shaft and rotates together.

[0048] Furthermore, the washing machine also includes,

[0049] An outer barrel, in which the inner barrel is rotatably mounted;

[0050] The mounting plate is fixedly mounted on the outer side of the bottom wall of the outer barrel, and the stator of the second driving unit is fixedly connected to the mounting plate.

[0051] The mounting structure is used to achieve relative fixation of the outer barrel, the mounting plate, the second stator, the housing and the first stator; the first stator is relatively fixed to the input shaft sleeve through the bearing, and the mounting structure is more compact and stable.

[0052] The washing machine can independently control the first driving unit and the second driving unit to drive the inner tub and the impeller to rotate respectively, and obtain a variety of washing water flows. For example, in a washing process, different ways of driving the inner tub and the impeller to rotate are set, including only the impeller rotating, only the inner tub rotating, the impeller and the inner tub rotating forward and reverse, and the impeller and the inner tub rotating in the same direction at different speeds; corresponding washing modes can also be set for different washing programs, and the washing modes are related to the direction and speed of driving the inner tub and the impeller to rotate; the washing machine can also be set with multiple washing modes, and various washing modes can be automatically or manually selected for some washing programs.

[0053] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0054] 1. The washing machine of the present invention adopts a driving unit to directly drive the inner tub and the impeller to rotate, eliminating the deceleration clutch, and has a simple structure. The height direction can be made more compact, the center of gravity is lower, and the vibration and noise effect is good.

[0055] 2. The driving device of the present invention adopts two motors to drive independently without affecting each other, so as to realize the independent rotation of the impeller and the inner tub. When the washing machine washes, the impeller and the inner tub rotate in the same direction, or rotate in opposite directions, or one of the impeller and the inner tub rotates. When dehydrating, the impeller and the inner tub rotate in the same direction and at the same speed, so as to obtain a variety of washing water flows.

[0056] 3. The stators of the two drive units of the present invention are isolated by the housing, which can reduce electromagnetic interference between each other and isolate their respective heat dissipation to avoid heat accumulation affecting their respective operating efficiency.

[0057] 4. The washing machine of the present invention fixes the first stator and the second stator respectively through the outer shell, the outer shell is installed on the input shaft sleeve through the bearing, and the first rotor and the second rotor are installed on the input shaft sleeve and the input shaft respectively, so as to realize the integrated assembly module of the driving unit, the input shaft and the input shaft sleeve, which can simplify the installation process of the washing machine, has a simple and compact structure, and can reduce the noise caused by working vibration.

[0058] 5. The washing machine of the present invention connects the second stator to the mounting plate at the bottom of the outer tub, further reducing the vibration noise of the driving device.

[0059] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0061] Figure 1 is a schematic diagram of a washing machine according to an embodiment of the present invention;

[0062] Figure 2 It is a schematic diagram of the first embodiment of the structure of the clamping part of the washing machine driving device of the present invention;

[0063] Figure 3 is a schematic diagram of a second embodiment of the structure of the clamping portion of the washing machine driving device of the present invention;

[0064] Figure 4 is a schematic structural diagram of a fourth embodiment of the clamping portion of the washing machine driving device of the present invention;

[0065] Figure 5 is a schematic structural diagram of a sixth embodiment of the clamping portion of the washing machine driving device of the present invention;

[0066] Figure 6 is a schematic diagram of the connection between the housing of the washing machine driving device of the present invention and the bearing housing;

[0067] Figure 7 is another schematic diagram of the installation of the housing of the washing machine driving device of the present invention;

[0068] Figure 8 It is a schematic diagram of an assembly of the first cover shell and the second cover shell of the present invention;

[0069] Fig. 9 It is a schematic diagram of the housing of the present invention surrounding the first driving unit.

[0070] In the figure: 1, outer barrel; 2, inner barrel; 21, input shaft; 211, bearing shell; 212, sealing component; 213, locking nut; 22, impeller; 23, input shaft sleeve; 3, outer shell; 30, bearing chamber; 31, first cover shell; 311, first peripheral wall; 312, second peripheral wall; 32, second cover shell; 33, mounting ear; 4, first drive unit; 41, first stator; 411, convex ring; 42, first rotor; 5, second drive unit; 51, second stator; 511, mounting portion; 512, mounting hole; 52, second rotor; 521, mounting support plate; 6, bearing cover shell; 7, bearing; 71, first bearing; 72, second bearing; 8, clamping portion; 80, support end surface 80; 81, transition section step; 82, protrusion; 9, mounting plate.

[0071] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0072] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0073] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0074] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] like Figure 1As shown, the washing machine of the present invention includes: a shell body, constituting the outer shape of the washing machine (not shown in the figure); an outer tub 1, supported in a suspended manner inside the shell body, for containing washing water; an inner tub 2, rotatably arranged inside the outer tub 1, for performing washing and dehydration; a pulsator 22, rotatably arranged inside the inner tub 2, for rotating and stirring to form a washing water flow; and a driving device, arranged at the lower part of the outer tub 1, for simultaneously or selectively driving the inner tub 2 and the pulsator 22 to rotate.

[0076] The driving device of the washing machine of the present invention comprises: a first driving unit 4, used for driving the input shaft sleeve 23 to rotate; a second driving unit 5, arranged at the outer periphery of the first driving unit 4, used for driving the input shaft 21 to rotate, and the input shaft 21 is coaxially arranged in the input shaft sleeve 23; and a housing 3, arranged outside the first driving unit 4, used for isolating the first driving unit 4 from the second driving unit 5, which can reduce the electromagnetic interference between each other and can also isolate the heat dissipation of each other to avoid heat accumulation affecting the operation efficiency of each other.

[0077] The first drive unit 4 includes: a first rotor 42, which is connected to the input sleeve 23 and rotates together with the input sleeve 23, and the first rotor 42 is splined and interference-fitted on the input sleeve 23; a first stator 41, which is arranged on the outer periphery of the first rotor 42 in a manner of forming a gap between the first rotor 42 and the first stator 41, and is connected to the inner wall of the housing 3.

[0078] The second drive unit 5 includes a second rotor 52 connected to the input shaft 21 and rotating together with the input shaft 21 ; and a second stator 51 disposed on the inner periphery of the second rotor 52 with a gap formed therebetween and connected to the outer wall of the housing 3 .

[0079] The washing machine further comprises a mounting plate 9 which is fixedly mounted on the outer side of the bottom wall of the outer tub 1 , and a second stator 51 of the second driving unit 5 is fixedly connected to the mounting plate 9 , so as to further reduce the vibration noise of the driving device during operation.

[0080] The input sleeve 23 is a hollow sleeve-shaped structure, one end of which is connected to the bottom of the inner tub 2, and the other end is connected to the first rotor 42; the input shaft 21 is coaxially arranged inside the input sleeve 23 in a rotatable manner, one end of the input shaft 21 extending into the inner tub is connected to the pulsator 22, and the other end is connected to the second rotor 52. The driving device of the washing machine transmits the rotational force to the inner tub 2 and the pulsator 22 through the input sleeve 23 and the input shaft 21. A bearing 211 is provided between the input sleeve 23 and the input shaft 21 (see Figure 8 and Fig. 9), the inner circumference of the bearing 211 contacts the input shaft 21, and the outer circumference contacts the input shaft sleeve 23, which is used to lubricate the rotating input shaft 21, and avoid friction between the bearing 211 and the rotatable input shaft 21, and avoid high temperature generated by the interaction. The material of the shell 3 can be metal or plastic that can weaken the magnetic field infection. Considering the problems of heat dissipation and electromagnetic interference prevention, the material of the shell 3 is preferably electromagnetic shielding plastic.

[0081] A sealing member 212 is also provided between the input shaft 21 and the input sleeve 23 (see Figure 8 and Fig. 9 ) to prevent the washing water loaded into the inner tub 2 from leaking out.

[0082] like Figures 1 to 7 As shown, the housing 3 of the present invention is disposed surrounding the first drive unit 4 , and the input shaft sleeve 23 rotatably passes through the housing 3 .

[0083] like Figures 2 to 5 As shown, a bearing chamber 30 for mounting the bearing 7 is formed between the outer shell 3 and the input shaft sleeve 23. The bearing chamber 30 surrounds the bearing 7. The inner ring of the bearing 7 is sleeved on the outer periphery of the input shaft sleeve 23, and the outer ring of the bearing 7 is embedded in the bearing chamber 30. That is, the bearing chamber 30 is a structure formed integrally with the outer shell 3.

[0084] Alternatively, the input shaft sleeve 23 of the present invention is provided with a bearing 7, the bearing 7 is installed in the bearing housing 6, the housing 3 is fixedly connected to the bearing housing 6, that is, the housing 3 and the bearing housing 6 are a separate structure (see Figure 6 ).

[0085] like Figures 2 to 7 As shown, the housing 3 includes: a first cover shell 31, a first bearing 71 is provided between one end and the input shaft sleeve 23, and the other end is open; a second cover shell 32, a second bearing 72 is provided between one end and the input shaft sleeve 23, and the other end is open; the open end of the first cover shell 31 and the open end of the second cover shell 32 are connected to each other, and an installation space is formed inside, and the first stator 41 of the first drive unit 4 is fixed in the installation space, and the first rotor 42 of the first drive unit 4 is located on the inner periphery of the first stator 41 and is connected to the input shaft sleeve 23.

[0086] The first stator 41 is clamped and fixed in the installation space by the first cover shell 31 and the second cover shell 32. For easy installation, the first stator 41 is preferably an integral structure with the first cover shell 31 or the second cover shell 32, and the second stator 51 is preferably an integral structure with the second cover shell 32 or the first cover shell 31.

[0087] At least one inner wall of the first housing 31 and the second housing 32 is provided with a clamping portion 8 for clamping the first stator 41, and the clamping portion 8 is spaced from the end of the opening;

[0088] Preferably, if Figure 3 , Figure 4 and Fig. 9 As shown, the inner wall of one of the first cover shell 31 and the second cover shell 32 is provided with a clamping portion 8, and the end surface of the opening end of the other cover shell protrudes from the inner wall of the cover shell with the clamping portion 8 in the installation space, and the end surface protruding from the inner wall of the cover shell with the clamping portion 8 forms a supporting end surface 80, and the supporting end surface 80 cooperates with the clamping portion 8 to clamp the first stator 41;

[0089] Or, if Figure 2 , Figures 5 to 7 As shown, the inner walls of the first cover shell 31 and the second cover shell 32 are both provided with a clamping portion 8 for clamping the first stator 41 , and the two clamping portions 8 cooperate to clamp the first stator 41 .

[0090] Specifically, Figure 2 , Figure 3 and Figures 5 to 7 As shown, at least one cover shell is provided with at least two sections of circumferential walls with different inner diameters in the direction extending from the opening end to one end in the opposite direction, including a first circumferential wall 311 constituting the opening end and a second circumferential wall 312 adjacent to the first circumferential wall 311, the inner diameter of the first circumferential wall 311 is greater than the inner diameter of the second circumferential wall 312, and a transition section step 81 is formed at the connection between the inner wall of the first circumferential wall 311 and the inner wall of the second circumferential wall 312, and the transition section step 81 constitutes the clamping portion 8 for clamping the first stator 41.

[0091] Or, if Figure 4 , Figure 5 and Fig. 9 As shown, the clamping portion 8 is a protrusion 82 protruding from the inner wall of the housing, and the protrusion 82 is an annular protrusion structure along the inner wall of the housing, or a protrusion distributed at intervals along the circumferential direction of the inner wall of the housing.

[0092] like Figures 2 to 9 As shown, mounting ears 33 are respectively protruded on the outer walls of the opening ends of the first cover shell 31 and the second cover shell 32 , and the first cover shell 31 and the second cover shell 32 are fixedly connected by bolts passing through the mounting ears 33 .

[0093] Embodiment 1

[0094] like Figure 2 As shown, in this embodiment, the inner walls of the first cover shell 31 and the second cover shell 32 are provided with a clamping portion 8 for clamping the first stator 41. The clamping portion 8 is at a certain distance from the corresponding open end of the cover shell, and the distance is related to the axial thickness of the clamped portion of the first stator 41.

[0095] The first cover shell 31 is provided with at least two sections of circumferential walls with different inner diameters in the direction extending from the opening end to one end in the opposite direction, including a first circumferential wall 311 constituting the opening end and a second circumferential wall 312 adjacent to the first circumferential wall 311. The inner diameter of the first circumferential wall 311 is greater than the inner diameter of the second circumferential wall 312. The connection between the inner wall of the first circumferential wall 311 and the inner wall of the second circumferential wall 312 forms a transition section step 81.

[0096] The first stator 41 includes an iron core, a winding, and an annular body that encapsulates the iron core and the winding. The outer peripheral wall of the annular body has a convex ring 411 extending outward. The outer diameter of the outer peripheral wall of the annular body is smaller than the inner diameter of the first cover shell 31 and is surrounded by the first cover shell 31. The outer diameter of the convex ring 411 is larger than the inner diameter of the second peripheral wall 312 and smaller than the inner diameter of the first peripheral wall 311. One axial end of the convex ring 411 abuts against the transition section step 81, thereby forming a clamping portion 8 for clamping the first stator 41 at the place where the inner diameters of the first peripheral wall 311 and the second peripheral wall 312 change.

[0097] The second cover shell 32 is also provided with at least two sections of circumferential walls with different inner diameters in the direction extending from the opening end to one end in the opposite direction, including a first circumferential wall 311 constituting the opening end and a second circumferential wall 312 adjacent to the first circumferential wall 311. The inner diameter of the first circumferential wall 311 is greater than the inner diameter of the second circumferential wall 312. The connection between the inner wall of the first circumferential wall 311 and the inner wall of the second circumferential wall 312 forms a transition section step 81.

[0098] The outer diameter of the outer wall of the annular body of the first stator 41 is smaller than the inner diameter of the second cover shell 32, and the annular body is surrounded by the second cover shell 32. The outer wall of the annular body has a convex ring 411 extending outward. The outer diameter of the convex ring 411 is larger than the inner diameter of the second circumferential wall 312 and smaller than the inner diameter of the first circumferential wall 311. The other axial end of the convex ring 411 abuts against the transition section step 81, thereby forming a clamping portion 8 for clamping the first stator 41 at the place where the inner diameters of the first circumferential wall 311 and the second circumferential wall 312 change.

[0099] The distance between the transition section step 81 and the end surface of the opening end of the first housing 31 is L1, the distance between the transition section step 81 and the end surface of the opening end of the second housing 32 is L2, and the axial length of the clamped portion of the convex ring 411 is L (see Figure 8 and Fig. 9 ), when L1+L2<L, there is a gap between the opening end surfaces of the first cover 31 and the second cover 32 (see Figure 7), when there is a gap between the end faces of the two shells, a groove extending from the inside to the outside is provided on at least one side surface of the convex ring facing the axial direction, so as to guide the heat inside the shell from the groove. Preferably, a guide groove communicating with the groove on the surface of the convex ring is provided along the axial direction on the outer peripheral wall of the first stator annular body, so as to better guide the hot air to the groove and discharge it to the outside of the shell when the first rotor rotates; and when L1+L2=L, there is no gap between the end faces of the openings of the first shell 31 and the second shell 32 (see Figure 2 ), this structure can better shield the electromagnetic interference of the two drive units.

[0100] Embodiment 2

[0101] like Figure 3 As shown, in this embodiment, the inner wall of the first cover shell 31 is provided with a clamping portion 8 for clamping the first stator 41, and the clamping portion 8 is at a certain distance from the open end of the first cover shell 31, and the distance is related to the axial thickness of the clamped part of the first stator 41; the end face of the open end of the second cover shell 32 protrudes from the end face of the inner wall of the cover shell with the clamping portion 8 in the installation space to form a supporting end face 80, and the supporting end face 80 cooperates with the clamping portion 8 to clamp the first stator 41.

[0102] The first cover shell 31 is provided with at least two sections of circumferential walls with different inner diameters in the direction extending from the opening end to one end in the opposite direction, including a first circumferential wall 311 constituting the opening end and a second circumferential wall 312 adjacent to the first circumferential wall 311. The inner diameter of the first circumferential wall 311 is greater than the inner diameter of the second circumferential wall 312. The connection between the inner wall of the first circumferential wall 311 and the inner wall of the second circumferential wall 312 forms a transition section step 81.

[0103] The first stator 41 includes an iron core, a winding, and an annular body that encapsulates the iron core and the winding. The outer peripheral wall of the annular body has a convex ring 411 extending outward. The outer diameter of the outer peripheral wall of the annular body is smaller than the inner diameter of the first cover shell 31 and is surrounded by the first cover shell 31. The outer diameter of the convex ring 411 is larger than the inner diameter of the second peripheral wall 312 and smaller than the inner diameter of the first peripheral wall 311. One axial end of the convex ring 411 abuts against the transition section step 81, thereby forming a clamping portion 8 for clamping the first stator 41 at the place where the inner diameters of the first peripheral wall 311 and the second peripheral wall 312 change.

[0104] The outer diameter of the outer wall of the annular body of the first stator 41 is smaller than the inner diameter of the second cover shell 32, and is surrounded by the second cover shell 32. The other axial end of the protruding ring 411 abuts against a supporting end face 80 formed by an end face protruding from the inner wall of the cover shell having the clamping portion 8, and the supporting end face 80 and the clamping portion 8 cooperate to clamp the first stator 41.

[0105] The distance between the transition section step 81 and the open end face of the first cover shell 31 is L1, and the axial length of the clamped part of the convex ring 411 is L. If L1<L, there is a gap between the open end faces of the first cover shell 31 and the second cover shell 32; if L1=L, there is no gap between the open end faces of the first cover shell 31 and the second cover shell 32.

[0106] In this embodiment, the open end face of the first cover shell 31 may protrude from the inner wall of the cover shell having the clamping portion 8 in the installation space, and the end face protruding from the inner wall of the cover shell having the clamping portion 8 cooperates with the clamping portion to clamp the first stator 41. The inner wall of the cover shell of the second cover shell 32 is provided with a clamping portion 8 for clamping the first stator 41, which will not be elaborated here.

[0107] Embodiment 3

[0108] In this embodiment, the inner walls of the first cover shell 31 and the second cover shell 32 are both provided with a clamping portion 8 for clamping the first stator 41. The clamping portion 8 is at a certain distance from the corresponding open end of the cover shell, and the distance is related to the axial thickness of the clamped portion of the first stator 41.

[0109] The clamping portion 8 of the present embodiment is a protrusion 82 protruding from the inner wall of the first cover shell 31 and the inner wall of the second cover shell 32. The outer peripheral wall of the annular body of the first stator 41 has a protruding ring 411 extending outward. The outer diameter of the outer peripheral wall of the annular body is larger than the inner diameter of the protrusion 82. Both axial ends of the protruding ring 411 are in contact with the protrusion 82, and the two protrusions 82 cooperate to clamp the first stator.

[0110] The distance between the protrusion 82 and the end face of the opening end of the first cover shell 31 is L1, the distance between the protrusion 82 and the end face of the opening end of the second cover shell 32 is L2, and the axial length of the clamped part of the protruding ring 411 is L. If L1+L2<L, there is a gap between the end faces of the opening ends of the first cover shell 31 and the second cover shell 32; if L1+L2=L, there is no gap between the end faces of the opening ends of the first cover shell 31 and the second cover shell 32.

[0111] Embodiment 4

[0112] like Figure 4 As shown, in this embodiment, the inner wall of the first cover shell 31 is provided with a clamping portion 8 for clamping the first stator 41. The clamping portion 8 is at a certain distance from the corresponding open end of the cover shell, and the distance is related to the axial thickness of the clamped part of the first stator 41. The end face of the open end of the second cover shell 32 protrudes from the end face of the inner wall of the cover shell with the clamping portion 8 in the installation space to form a supporting end face 80, and the supporting end face 80 cooperates with the clamping portion 8 to clamp the first stator 41.

[0113] The clamping portion 8 of the first cover shell 31 is a protrusion 82 protruding from the inner wall of the first cover shell 31. The outer peripheral wall of the annular body of the first stator 41 has a protruding ring 411 extending outward. The outer diameter of the protruding ring 411 is larger than the inner diameter of the protrusion 82 and smaller than the inner diameter of the first cover shell 31. One axial end of the protruding ring 411 abuts against the protrusion 82, and the other end abuts against the supporting end face 80. The supporting end face 80 and the protrusion 82 cooperate to clamp the first stator 41.

[0114] The outer diameter of the outer wall of the annular body of the first stator 41 is smaller than the inner diameter of the second cover shell 32, and is surrounded by the second cover shell 32. The outer diameter of the protruding ring 411 is larger than the inner diameter of the second cover shell 32 and smaller than the outer diameter of the second cover shell 32. The other axial end of the protruding ring 411 abuts against a supporting end face 80 formed by an end face protruding from the inner wall of the cover shell having a clamping portion 8. The supporting end face 80 forms a clamping portion 8 for clamping the first stator 41.

[0115] The distance between the protrusion 82 and the end face of the opening end of the first cover shell 31 is L1, and the axial length of the clamped part of the protruding ring 411 is L. If L1<L, there is a gap between the end faces of the opening ends of the first cover shell 31 and the second cover shell 32; if L1=L, there is no gap between the end faces of the opening ends of the first cover shell 31 and the second cover shell 32.

[0116] In this embodiment, the open end face of the first cover shell 31 may protrude from the end face of the inner wall of the cover shell having the clamping portion 8 in the installation space to form a supporting end face 80, and the inner wall of the cover shell of the second cover shell 32 may be provided with a protrusion 82 for clamping the first stator 41, and the supporting end face 80 of the first cover shell 31 and the protrusion 82 of the second cover shell 32 cooperate to clamp the first stator 41.

[0117] Embodiment 5

[0118] like Figure 5 As shown, in this embodiment, the inner walls of the first cover shell 31 and the second cover shell 32 are provided with a clamping portion 8 for clamping the first stator 41. The clamping portion 8 is at a certain distance from the open end of the first cover shell 31, and the distance is related to the axial thickness of the clamped portion of the first stator 41.

[0119] The clamping portion 8 of the first cover shell 31 is a protrusion 82 protruding from the inner wall of the first cover shell 31. The outer peripheral wall of the annular body of the first stator 41 has a protruding ring 411 extending outward. The outer diameter of the protruding ring 411 is larger than the inner diameter of the protrusion 82 and smaller than the inner diameter of the first cover shell 31. One axial end of the protruding ring 411 abuts against the protrusion 82.

[0120] The second cover shell 32 is provided with at least two sections of circumferential walls with different inner diameters in the direction extending from the opening end to one end in the opposite direction, including a first circumferential wall 311 constituting the opening end and a second circumferential wall 312 adjacent to the first circumferential wall 311. The inner diameter of the first circumferential wall 311 is greater than the inner diameter of the second circumferential wall 312. The connection between the inner wall of the first circumferential wall 311 and the inner wall of the second circumferential wall 312 forms a transition section step 81.

[0121] The first stator 41 includes an iron core, a winding, and an annular body that encapsulates the iron core and the winding. The outer peripheral wall of the annular body has a convex ring 411 extending outward. The outer diameter of the outer peripheral wall of the annular body is smaller than the inner diameter of the second cover shell 32 and is surrounded by the second cover shell 32. The outer diameter of the convex ring 411 is larger than the inner diameter of the second peripheral wall 312 and smaller than the inner diameter of the first peripheral wall 311. The other axial end of the convex ring 411 abuts against the transition section step 81. The transition section step 81 of the second cover shell 32 and the protrusion 82 of the first cover shell 31 cooperate to clamp the first stator 41.

[0122] The distance between the transition section step 81 and the end face of the opening end of the first cover shell 31 is L1, the distance between the protrusion 82 and the end face of the opening end of the second cover shell 32 is L2, and the axial length of the clamped part of the protruding ring 411 is L. If L1+L2<L, there is a gap between the end faces of the opening ends of the first cover shell 31 and the second cover shell 32; if L1+L2=L, there is no gap between the end faces of the opening ends of the first cover shell 31 and the second cover shell 32.

[0123] Embodiment 6

[0124] like Figures 2 to 7 As shown, the second stator 51 is provided with a mounting hole 512, and the second stator 51 is fixed to the outside of the housing 3 by bolts passing through the mounting ears 33 and connecting with the mounting holes 512, or the second stator 51 is fixed to the outside of the housing 3 by bolts passing through the mounting holes 512 and connecting with the mounting ears 33 (the bolts are not shown in the figure).

[0125] Specifically, the second stator 51 includes an iron core, a winding, and an annular body that encapsulates the iron core and the winding, and also includes a mounting portion 511. The mounting portion 511 is arranged on the inner circumference of the annular body and connected to the inner wall of the annular body. The mounting portion 511 is connected to the outer shell 3, and the mounting hole 512 is a threaded hole axially arranged on the mounting portion 511.

[0126] The mounting hole 512 of the second stator 51 includes two sections with a variable inner diameter, including a first section and a second section. The inner diameter of the first section, the inner diameter of the mounting hole 512 of the mounting ear 33, and the bolt column directly match each other, and the inner diameter of the second section matches the nut or bolt head, which is used to assemble the nut or bolt head in the second section mounting hole 512 to reduce the height protruding from the surface of the second stator 51, so as to avoid the airflow generated on the inner periphery of the second rotor 52 and the height protruding from the surface of the second stator 51 when the second rotor 52 arranged on the outer periphery of the second stator 51 rotates, thereby preventing the airflow generated on the inner periphery of the second rotor 52 from interacting with the height protruding from the surface of the second stator 51 to generate a large noise.

[0127] like Figures 2 to 7 As shown, the second rotor 52 includes a rotor body and a mounting support plate 521. The rotor body is protruded on the outer periphery of the mounting support plate 521 on one side facing the mounting support plate 521. An input shaft connecting hole is provided at the center of the mounting support plate 521. The input shaft 21 is rotatably arranged in the input shaft connecting hole. In order to ensure the stability of the mounting support plate 521 fixing the input shaft 21, the axial thickness of the portion of the mounting support plate 521 contacting the input shaft 21 is much greater than the axial thickness of the portion of the mounting support plate 521 not contacting the input shaft 21. In addition, the mounting support plate 521 is also provided with penetrating heat dissipation holes for discharging the heat generated by the rotation of the input shaft 21. In order not to reduce the strength of the mounting support plate 521 and increase the heat dissipation efficiency, it is preferred to distribute the heat dissipation holes circumferentially at a position of the mounting support plate 521 close to the rotor body.

[0128] The second rotor 52 is mounted on the input shaft 21 via a spline sleeve and rotates integrally with the input shaft 21 , and then is locked by a locking nut 213 to prevent axial loosening.

[0129] The washing machine described in the present invention takes a pulsator washing machine as an example, but is not limited to a pulsator washing machine. The driving device of the present invention can also be applied to a drum washing machine.

[0130] The washing machine of the present invention can independently control the first driving unit and the second driving unit to drive the inner barrel and the impeller to rotate respectively, and obtain a variety of washing water flows. For example, in a washing process, different ways of driving the inner barrel and the impeller to rotate are set, including only the impeller rotating, only the inner barrel rotating, the impeller and the inner barrel rotating forward and reversely, and the impeller and the inner barrel rotating in the same direction with differential speed; corresponding washing modes can also be set for different washing programs, and the washing mode is related to the direction and speed of driving the inner barrel and the impeller to rotate; the washing machine can also be set with multiple washing modes, and various washing modes can be automatically or manually selected for some washing programs. The driving device of the present invention enables the washing machine to obtain more water flow. Since a shell is set between the first driving unit and the second driving unit, the electromagnetic influence between the two driving units is reduced, the effective driving of the impeller and the inner barrel to rotate simultaneously is improved, and the stirring water flow effect is better.

[0131] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above in the preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation scheme in the above embodiment can also be further combined or replaced. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the solution of the present invention.

Claims

1. A washing machine driving device, characterized in that: include, A first driving unit (4), used for driving the input shaft sleeve (23) to rotate; A second driving unit (5) is arranged on the outer periphery of the first driving unit (4) and is used to drive the input shaft (21) to rotate. The input shaft (21) is coaxially arranged in the input shaft sleeve (23); The housing (3) is arranged outside the first drive unit (4) and is used to isolate the first drive unit (4) from the second drive unit (5).

2. The washing machine driving device according to claim 1, characterized in that: The housing (3) surrounds the first drive unit (4), and the input shaft sleeve (23) rotatably passes through the housing (3).

3. The driving device of the washing machine according to claim 2, characterized in that: A bearing chamber (30) for mounting a bearing (7) is formed between the housing (3) and the input shaft sleeve (23); an inner ring of the bearing (7) is sleeved on the outer periphery of the input shaft sleeve (23), and an outer ring of the bearing (7) is embedded in the bearing chamber (30).

4. The driving device of the washing machine according to claim 2, characterized in that: The input shaft sleeve (23) is sleeved with a bearing (7), the bearing (7) is installed in a bearing housing (6), and the outer housing (3) is connected to the bearing housing (6).

5. The driving device of a washing machine according to any one of claims 1 to 4, characterized in that: The first driving unit (4) comprises: A first rotor (42) connected to the input shaft sleeve (23) and rotating together with the input shaft sleeve (23); The first stator (41) is arranged on the outer periphery of the first rotor (42) in a manner of forming a gap between the first stator and the first rotor (42), and is connected to the inner wall of the housing (3); The second driving unit (5) comprises, A second rotor (52) connected to the input shaft (21) and rotating together with the input shaft (21); The second stator (51) is arranged on the inner periphery of the second rotor (52) so as to form a gap between the second stator (51) and the second rotor (52), and is connected to the outer wall of the housing (3).

6. The driving device of the washing machine according to claim 5, characterized in that: The housing (3) comprises, A first housing (31) having a first bearing (71) disposed between one end and the input shaft sleeve (23) and an opening at the other end; A second housing (32) having a second bearing (72) disposed between one end and the input shaft sleeve (23) and an opening at the other end; The open end of the first cover shell (31) and the open end of the second cover shell (32) are butted against each other to form an installation space inside, and the first stator (41) is fixed in the installation space.

7. The driving device of the washing machine according to claim 6, characterized in that: The first stator (41) is clamped and fixed in the installation space by the first cover shell (31) and the second cover shell (32).

8. The driving device of the washing machine according to claim 7, characterized in that: The first stator (41) comprises an iron core, a winding and an annular body encapsulating the iron core and the winding. The outer peripheral wall of the annular body has a convex ring (411) extending outwards. The first cover shell (31) and the second cover shell (32) clamp the convex ring (411).

9. The driving device of the washing machine according to claim 7 or 8, characterized in that: At least one inner wall of the first cover shell (31) and the second cover shell (32) is provided with a clamping portion (8) for clamping the first stator (41), and the clamping portion is spaced apart from the end of the opening; Preferably, the inner wall of one of the first cover shell (31) and the second cover shell (32) is provided with a clamping portion (8), and the end surface of the opening end of the other cover shell protrudes from the inner wall of the cover shell with the clamping portion in the installation space, and the end surface protruding from the inner wall of the cover shell with the clamping portion cooperates with the clamping portion (8) to clamp the first stator (41); Alternatively, the inner walls of the first cover shell (31) and the second cover shell (32) are both provided with a clamping portion (8) for clamping the first stator (41), and the two clamping portions (8) cooperate to clamp the first stator (41).

10. The driving device of the washing machine according to claim 9, characterized in that: At least one cover shell is provided with at least two sections of peripheral walls with different inner diameters in a direction extending from the opening end to one end in the opposite direction, including a first peripheral wall (311) constituting the opening end and a second peripheral wall (312) adjacent to the first peripheral wall (311), the inner diameter of the first peripheral wall (311) is greater than the inner diameter of the second peripheral wall (312), and a transition section step (81) is formed at the connection between the inner wall of the first peripheral wall (311) and the inner wall of the second peripheral wall (312), and the transition section step (81) constitutes the clamping portion.

11. The driving device of the washing machine according to claim 6, characterized in that: Mounting ears (33) are respectively protruded on the outer walls of the opening ends of the first cover shell (31) and the second cover shell (32), and the first cover shell (31) and the second cover shell (32) are fixedly connected by bolts passing through the mounting ears (33).

12. The driving device of the washing machine according to claim 11, characterized in that: The second stator (51) is provided with a mounting hole (512), and the second stator (51) is fixed to the outside of the housing (3) by means of bolts passing through the mounting ears (33) and connected to the mounting holes (512), or the second stator (51) is fixed to the outside of the housing (3) by means of bolts passing through the mounting holes (512) and connected to the mounting ears (33).

13. The driving device of the washing machine according to claim 12, characterized in that: The second stator (51) comprises an iron core, a winding and an annular body encapsulating the iron core and the winding, and also comprises a mounting portion (511), wherein the mounting portion (511) is arranged on the inner circumference of the annular body and connected to the inner wall of the annular body, the mounting portion (511) is connected to the outer shell (3), and the mounting hole (512) is a threaded hole, which is axially arranged on the mounting portion (511).

14. The driving device of the washing machine according to claim 6, characterized in that: The first stator (41) and the first cover shell (31) or the second cover shell (32) are an integral structure.

15. The driving device of the washing machine according to claim 6, characterized in that: The second stator (51) and the second cover shell (32) or the first cover shell (31) are an integral structure.

16. The driving device of the washing machine according to claim 6, characterized in that: The first cover shell (31) and / or the second cover shell (32) are distributed with penetrating heat dissipation holes.

17. A washing machine, characterized in that: include, Inner barrel (2); A pulsator (22) is rotatably mounted in the inner tub (2); According to the driving device of a washing machine as claimed in any one of claims 1 to 16, the inner tub (2) is connected to the input shaft sleeve (23) and rotates together, and the impeller (22) is connected to the input shaft (21) and rotates together.

18. The washing machine according to claim 17, characterized in that: Also includes, An outer barrel (1), wherein the inner barrel (2) is rotatably mounted in the outer barrel (1); The mounting plate (9) is fixedly mounted on the outer side of the bottom wall of the outer barrel (1), and the stator of the second drive unit (5) is fixedly connected to the mounting plate (9).

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