Driving device and washing machine

Abstract

The invention discloses a driving device and a washing machine, the driving device comprises a motor body provided with a rotating shaft, a first impeller, a clutch mechanism and a second impeller, and the first impeller is installed on the rotating shaft of the motor and rotates relative to the rotating shaft; the clutch mechanism is fixedly installed on the rotating shaft, when the clutch mechanism is in a first state, the clutch mechanism and the first impeller rotate synchronously, and when the clutch mechanism is in a second state, the clutch mechanism is separated from the first impeller; the second impeller and the rotating shaft are of an integrated structure, and the outer diameter of the second impeller is smaller than that of the first impeller; when the clutch mechanism is in the first state, the rotating speed of the motor body is V1, when the clutch mechanism is in the second state, the rotating speed of the motor body is V2, and V1 is smaller than V2. According to the driving device, the first impeller can be separated from the rotating shaft of the motor body when the motor body rotates at a high speed, so that generation of pneumatic noise and wind resistance loss are avoided, and heat dissipation of the motor body can be achieved through the second impeller with the small outer diameter when the motor body rotates at the high speed.

Description

[0001] This application is a divisional application of the case with application date "2023.10.26", application number "2023114068085", and application name "Impeller assembly, drive device and washing machine". Technical Field

[0002] The present invention relates to the technical field of motors, and in particular to a driving device and a washing machine. Background Art

[0003] Drum washing machines, pulsator washing machines, etc. usually have at least two working conditions, namely washing and dehydrating. That is to say, the corresponding motor has at least two gears with different speeds. In the washing condition, the speed of the motor is generally below 1000rpm, while in the dehydrating condition, the speed of the motor is much greater than 1000rpm, reaching 10000rpm or above. In order to dissipate the heat of the motor, generally speaking, fan blades are installed on the motor. Although low-speed fan blades can effectively dissipate the heat of the motor in the washing condition, high-speed fan blades will cause increased aerodynamic noise and large wind resistance loss in the dehydrating condition, affecting the output power of the motor. The existing fan blades cannot take into account both working conditions. How to take into account the above two working conditions and ensure the heat dissipation effect of the motor is a problem that still needs to be solved. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a driving device that can separate a first impeller with a larger outer diameter from a rotating shaft of a motor body when the motor body rotates at a high speed to avoid the generation of aerodynamic noise and wind resistance loss, and can achieve heat dissipation of the motor body through a second impeller with a smaller outer diameter when rotating at a high speed.

[0005] The present invention also provides a washing machine having the driving device.

[0006] The driving device according to the first embodiment of the present invention comprises:

[0007] The motor body is provided with a rotating shaft;

[0008] A first impeller is mounted on the rotating shaft of the motor and rotates relative to the rotating shaft;

[0009] A clutch mechanism is fixedly mounted, and when the clutch mechanism is in a first state, the clutch mechanism rotates synchronously with the first impeller, and when the clutch mechanism is in a second state, the clutch mechanism is separated from the first impeller;

[0010] A second impeller is an integral structure with the rotating shaft, and the outer diameter of the second impeller is smaller than the outer diameter of the first impeller;

[0011] When the clutch mechanism is in the first state, the speed of the motor body is V 1 When the clutch mechanism is in the second state, the speed of the motor body is V 2 , satisfying V 1 <V 2 .

[0012] The driving device according to the first embodiment of the present invention has at least the following beneficial effects: by setting a clutch mechanism, in the first state of low speed, the clutch mechanism can rotate synchronously with the first impeller, that is, the first impeller and the rotating shaft of the motor body rotate synchronously, and combined with the second impeller, it is suitable for heat dissipation of the motor body itself; in the second state of high speed, the clutch mechanism can separate from the first impeller with a larger outer diameter, so that the first impeller is separated from the rotating shaft of the motor body, and the first impeller stops rotating, thereby avoiding aerodynamic noise and wind resistance loss caused by high speed, and reducing the impact on the output power of the motor. At the same time, when rotating at high speed, the second impeller with a smaller outer diameter can be used to dissipate heat to the motor body to meet the heat dissipation requirements of the motor body.

[0013] According to some embodiments of the present invention, the outer diameter of the first impeller is D 1 , the outer diameter of the second impeller is D 2 , satisfied: D 1 / D 2 =V 2 / V 1 .

[0014] According to some embodiments of the present invention, the first impeller and the second impeller are located at one end of the motor body along the axial direction of the rotating shaft, and the second impeller is closer to the motor body than the first impeller; or the first impeller and the second impeller are respectively located at both ends of the motor body along the axial direction of the rotating shaft.

[0015] According to some embodiments of the present invention, the clutch mechanism includes a mounting seat and a clutch component, the clutch component includes an elastic member and a coupling member, the mounting seat is suitable for being connected to the rotating shaft, the coupling member is movably mounted on the mounting seat, the elastic member is arranged on the mounting seat, the first impeller includes a transmission part, when the clutch mechanism is in the first state, the elastic member can drive the coupling member to deviate so that the coupling member is combined with the transmission part, and when the clutch mechanism is in the second state, the coupling member can deviate in the opposite direction and separate from the transmission part.

[0016] According to some embodiments of the present invention, the coupling member is slidably mounted on the mounting seat, and an angle between a sliding direction of the coupling member and a center line of the first impeller is greater than 0°.

[0017] According to some embodiments of the present invention, the coupling member is located on one side of a reference plane passing through the center line of the first impeller, and when the clutch mechanism is in the first state, the elastic member can drive the coupling member to move toward the center line of the first impeller.

[0018] According to some embodiments of the present invention, the clutch mechanism includes a plurality of clutch components, and the plurality of clutch components are arranged symmetrically about a center line of the first impeller.

[0019] According to some embodiments of the present invention, the coupling member is provided with a coupling portion, and the center of mass of the coupling member and the coupling portion are respectively located on both sides of a reference plane passing through the center line of the first impeller, and when the clutch mechanism is in the first state, the elastic member can drive the center of mass to move toward the center line of the first impeller, and the coupling portion moves in a direction away from the center line of the first impeller.

[0020] According to some embodiments of the present invention, the coupling member includes a rod and a head, the head is connected to one end of the rod, the other end of the rod is provided with the coupling portion, the outer diameter of the head is larger than the outer diameter of the rod, and the head and the coupling portion are respectively located on both sides of the reference plane.

[0021] According to some embodiments of the present invention, the transmission portion is a convex portion, and the engaging member can abut against one side of the convex portion along the circumferential direction of the first impeller.

[0022] According to some embodiments of the present invention, the transmission portion is a recessed portion, and the coupling member can be partially accommodated in the recessed portion.

[0023] According to some embodiments of the present invention, the transmission portion is in the shape of an elongated strip and extends along the center line direction of the first impeller.

[0024] According to some embodiments of the present invention, the first impeller is provided with a sleeve, the sleeve extends along the center line direction of the first impeller, the transmission part is provided on the sleeve, the mounting seat is sleeved on the outer periphery of the sleeve, or the sleeve is sleeved on the outer periphery of the mounting seat.

[0025] According to some embodiments of the present invention, the first impeller is provided with a bearing, and the first impeller is suitable for being mounted on the rotating shaft through the bearing.

[0026] A washing machine according to a second embodiment of the present invention comprises the driving device of the first embodiment.

[0027] The washing machine according to the second embodiment of the present invention has at least the following beneficial effects: the washing machine adopts the above-mentioned driving device, and by setting a clutch mechanism, in the first state of low speed, the clutch mechanism can rotate synchronously with the first impeller, that is, the first impeller and the rotating shaft of the motor body rotate synchronously, and combined with the second impeller, it is suitable for heat dissipation of the motor body itself. In the second state of high speed, the clutch mechanism can separate from the first impeller with a larger outer diameter, so that the first impeller is separated from the rotating shaft of the motor body, and the first impeller stops rotating, thereby avoiding the aerodynamic noise and wind resistance loss caused by the high speed, and reducing the impact on the output power of the motor. At the same time, when rotating at high speed, the second impeller with a smaller outer diameter can be used to achieve heat dissipation of the motor body to meet the heat dissipation requirements of the motor body.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0030] Figure 1 is an exploded schematic diagram of a driving device including an impeller assembly in an embodiment of the present invention;

[0031] Figure 2 is a front view of a driving device including an impeller assembly in an embodiment of the present invention;

[0032] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0033] Figure 4 for Figure 3 Enlarged view of point C in the middle;

[0034] Figure 5 for Figure 2 Sectional view at the middle BB;

[0035] Figure 6 FIG. 4 is a cross-sectional view of an impeller assembly in another embodiment of the present invention.

[0036] Reference numerals:

[0037] A first impeller 100; a sleeve 110; a transmission part 120; a bearing 130;

[0038] Clutch mechanism 200; mounting seat 210; slide slot 211; end cover 212; clutch member 220; elastic member 221; coupling member 222; coupling portion 2221; rod portion 2222; head portion 2223;

[0039] A second impeller 300;

[0040] Motor body 400; Rotating shaft 410. DETAILED DESCRIPTION

[0041] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are 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 device or element referred to 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.

[0043] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0044] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, assembling, and matching should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0045] Drum washing machines, pulsator washing machines, etc. usually have at least two working conditions, namely washing and dehydration, that is, the corresponding motor has at least two gears with different speeds. In the washing condition, the speed of the motor is generally below 1000rpm, that is, the motor is in a low speed gear, and in the dehydration condition, the speed of the motor is much greater than 1000rpm, reaching 10000rpm or more, that is, the motor is in a high speed gear. In order to dissipate the heat of the motor, generally speaking, a fan blade is installed on the motor to drive the air flow through the fan blade to achieve heat dissipation of the motor. Although the low-speed fan blade can effectively dissipate the heat of the motor under the washing condition, however, under the dehydration condition, the high-speed fan blade will cause an increase in aerodynamic noise and a large wind resistance loss, affecting the output power of the motor. According to simulation calculations, a fan blade that consumes 0.19W of shaft power at a speed of 1000rpm, when the speed reaches 10000rpm, the shaft power consumed by the fan blade increases to 176.57W, accounting for 26% of the maximum output power of the motor, which has a greater impact on the output power of the motor. Existing fan blades cannot take into account both of the above two working conditions.

[0046] To solve the above problems, refer to Figures 1 to 6 As shown, an embodiment of the present invention provides an impeller assembly, which is applied to a motor with different speed gears, so that the impeller rotates at a low speed and dissipates the heat of the motor itself, and the impeller does not rotate at a high speed, so as to avoid the generation of noise and wind resistance loss. It is easy to understand that the impeller assembly and the motor are combined to form a driving device. For example, the impeller assembly can be installed on the driving motor of a washing machine, so that the driving motor itself can be dissipated under the washing condition (that is, the driving motor is in a low speed gear), and the noise and wind resistance loss can be avoided under the dehydration condition (that is, the driving motor is in a high speed gear), so as to avoid affecting the output power of the driving motor. The washing machine here can be a drum washing machine or a pulsator washing machine.

[0047] The structure of the impeller assembly will be described in detail below by taking the impeller assembly installed on a drum washing machine as an example.

[0048] Reference Figure 1 and Figure 2 As shown, it can be understood that the impeller assembly is mounted on the rotating shaft 410 of the driving motor of the drum washing machine, and the impeller assembly includes a first impeller 100 and a clutch mechanism 200, wherein the first impeller 100 is rotatably mounted on the rotating shaft 410, specifically, the center line Z of the first impeller 100 has a hollow structure and is equipped with a bearing 130, and the bearing 130 is fixedly mounted on the rotating shaft 410, that is, the first impeller 100 is mounted on the rotating shaft 410 through the bearing 130, so that the first impeller 100 can rotate freely relative to the rotating shaft 410, and the rotation friction and resistance are small. The center line Z here is the rotation axis of the first impeller 100.

[0049] Reference Figure 2 and Figure 3 As shown, it can be understood that the clutch mechanism 200 is mounted on the rotating shaft 410 and is limited to the rotating shaft 410 along the circumferential direction of the rotating shaft 410, that is, the clutch mechanism 200 is fixedly mounted on the rotating shaft 410, so the clutch mechanism 200 can rotate synchronously with the rotating shaft 410. Exemplarily, the clutch mechanism 200 is arranged on one side of the first impeller 100 along the centerline direction. Specifically, the clutch mechanism 200 includes a mounting seat 210, which is an annular structure and is sleeved on the rotating shaft 410. The mounting seat 210 is connected to the rotating shaft 410 by means of a keyway and a key, a bayonet or a flange arranged along the radial direction of the rotating shaft 410, so that the mounting seat 210 is relatively fixed to the rotating shaft 410 and can rotate synchronously with the rotating shaft 410.

[0050] Reference Figure 3 As shown, it can be understood that, in order to facilitate the cooperation between the clutch mechanism 200 and the first impeller 100, the first impeller 100 is provided with a sleeve 110, the sleeve 110 extends along the center line direction of the first impeller 100 and is sleeved on the rotating shaft 410, and the mounting seat 210 is sleeved on the outer periphery of the sleeve 110. The side of the sleeve 110 facing the center line Z of the first impeller 100 is defined as the inner side, and the side of the sleeve 110 facing away from the center line Z of the first impeller 100 is defined as the outer side.

[0051] Reference Figure 4 and Figure 5 As shown, it can be understood that the clutch mechanism 200 also includes a clutch component 220, which is located outside the sleeve 110. The clutch component 220 is composed of an elastic member 221 and a coupling member 222. Specifically, the coupling member 222 is set as a columnar structure or a spherical structure, such as a steel column, a steel ball, etc., and the cross-section of the coupling member 222 can be circular, polygonal, etc. The coupling member 222 is slidably mounted on the mounting seat 210, and the angle between the sliding direction of the coupling member 222 and the center line Z of the first impeller 100 is greater than 0°. Exemplarily, the coupling member 222 is slidably mounted on the mounting seat 210 along the radial direction of the rotating shaft 410. In other embodiments, the sliding direction of the coupling member 222 can also be arranged obliquely relative to the radial direction of the rotating shaft 410.

[0052] Reference Figure 4 and Figure 5As shown, it can be understood that the mounting seat 210 is provided with a slide groove 211, which is arranged along the radial direction of the rotating shaft 410, and the slide groove 211 is located outside the sleeve 110, and one end of the slide groove 211 is open and the opening faces the center line Z of the first impeller 100, and the other end of the slide groove 211 is provided with an end cover 212, and the end cover 212 is fixedly connected to the mounting seat 210 by threaded connection, welding, etc., or the end cover 212 and the mounting seat 210 are an integrally formed structure. The coupling member 222 is slidably mounted on the slide groove 211 and can partially extend out of the opening of the slide groove 211 to accurately guide the coupling member 222.

[0053] Reference Figure 4 and Figure 5 As shown, it can be understood that, based on the clutch member 220 being located outside the sleeve 110, the coupling member 222 is located outside the sleeve 110, that is, the coupling member 222 is located on one side of the reference plane passing through the center line Z of the first impeller 100. The end of the coupling member 222 that can extend out of the notch of the slide slot 211 is defined as the coupling portion 2221, therefore, at this time, the centroid of the coupling member 222 and the coupling portion 2221 are located on the same side of the above-mentioned reference plane, and the centroid of the coupling member 222 and the coupling portion 2221 must move in the same direction.

[0054] Reference Figure 4 and Figure 5 As shown, it can be understood that the elastic member 221 can be a spring, a spring sheet or the like. The elastic member 221 is installed in the slide groove 211 and is located between the end cover 212 and the coupling member 222. Generally speaking, the elastic member 221 is in a pre-compressed state. Under the elastic action of the elastic member 221, the elastic member 221 applies a force F in the radially inward direction of the rotating shaft 410 to the coupling member 222. 1 .

[0055] Of course, it can be understood that the elastic member 221 can also be in a pre-stretched state. Based on this, one end of the elastic member 221 is connected to the opening of the slide slot 211, and the other end is connected to the opening of the coupling member 222 away from the slide slot 211. For example, when the elastic member 221 is a spring, the spring is sleeved on the coupling member 222, so that the elastic member 221 can apply a force F in the radial inward direction of the rotating shaft 410 to the coupling member 222. 1 .

[0056] Reference Figure 4 and Figure 5As shown, it can be understood that, corresponding to the coupling member 222, the first impeller 100 includes a transmission part 120, specifically, the transmission part 120 is arranged on the outer peripheral wall of the sleeve 110, and the transmission part 120 can be a convex part or a concave part. Exemplarily, the transmission part 120 is a convex part, and the convex part is arranged to protrude outward along the radial direction of the rotating shaft 410. When the coupling part 2221 of the coupling member 222 extends out of the opening of the slide groove 211 and contacts one side of the convex part along the circumferential direction of the rotating shaft 410, the coupling member 222 is in a state of coupling with the transmission part 120. At this time, the torque of the rotating shaft 410 can be transmitted to the first impeller 100 through the clutch mechanism 200, so that the first impeller 100 can rotate synchronously with the clutch mechanism 200 and the rotating shaft 410. In other embodiments, the transmission portion 120 is a recess with an opening facing outward. When the coupling portion 2221 of the coupling 222 extends out of the opening of the slide groove 211 and is inserted into the recess, the coupling 222 is in a coupled state with the transmission portion 120. Similarly, at this time, the first impeller 100 can rotate synchronously with the clutch mechanism 200 and the rotating shaft 410.

[0057] Reference Figure 4 As shown, it is easy to understand that when the shaft 410 rotates, the clutch mechanism 200 rotates with the shaft 410. Since the center of mass of the coupling member 222 deviates from the rotation axis of the shaft 410 (which is also the center line Z of the first impeller 100), the coupling member 222 will be subjected to the centrifugal force F 2 The centrifugal force F 2 The direction is radially outward along the rotating shaft 410, that is, the centrifugal force F on the coupling member 222 is 2 The force F exerted by the elastic member 221 on the coupling member 222 1 When the shaft 410 is not rotating, the centrifugal force F 2 =0, at this time, the coupling member 222 is only subjected to the force F exerted by the elastic member 221 1 , the force F of the elastic member 221 1 The coupling member 222 is driven to move toward the center line Z of the first impeller 100, so that the coupling portion 2221 of the coupling member 222 extends out of the opening of the slide slot 211, so that the coupling member 222 is coupled with the transmission portion 120, that is, the rotating shaft 410 is coupled with the first impeller 100 through the clutch mechanism 200. As the rotating shaft 410 rotates, the rotating shaft 410 can drive the first impeller 100 to rotate through the clutch mechanism 200, and the coupling member 222 is subjected to the centrifugal force F 2 The centrifugal force F 2 The size of increases with the increase of speed. It is easy to understand that there is a critical speed N 1 , when the rotation speed of the shaft 410 is equal to N 1 When F 2 =F 1, the coupling member 222 and the transmission part 120 remain coupled, and the first impeller 100 rotates with the shaft 410. When the rotation speed of the shaft 410 (i.e., the rotation speed of the motor) is less than N 1 When F 2 <F 1 , the coupling member 222 and the transmission part 120 remain coupled, and the first impeller 100 rotates with the rotating shaft 410. When the rotating speed of the rotating shaft 410 is greater than N 1 When F 2 >F 1 , under the centrifugal force F 2 Under the action of , the coupling 222 is driven to move in the direction away from the center line Z of the first impeller 100, so that the coupling portion 2221 of the coupling 222 is separated from the transmission portion 120, and the coupling portion 2221 is retracted into the slide groove 211, thereby separating the clutch mechanism 200 from the first impeller 100, that is, the rotating shaft 410 is separated from the first impeller 100. At this time, only the rotating shaft 410 and the clutch mechanism 200 rotate, and the first impeller 100 does not rotate.

[0058] Define the motor speed to be less than N 1 When the clutch mechanism 200 is in the first state, the speed of the motor is greater than N 1 When the clutch mechanism 200 is in the second state, therefore, in the first state at low speed, the clutch mechanism 200 can rotate synchronously with the first impeller 100, that is, the first impeller 100 rotates synchronously with the rotating shaft 410, which is suitable for heat dissipation of the motor itself; in the second state at high speed, the clutch mechanism 200 can separate from the first impeller 100, so that the first impeller 100 is separated from the rotating shaft 410, and the first impeller 100 stops rotating, thereby avoiding the aerodynamic noise and wind resistance loss caused by the high speed and reducing the impact on the output power of the motor.

[0059] For a washing machine, there are at least two working conditions: washing and dehydration. In the washing condition, the speed of the driving motor is less than N 1 , that is, low speed. Under dehydration conditions, the speed of the drive motor is greater than N 1 , which is a high speed. Therefore, for a washing machine, under the washing condition, the first impeller 100 rotates synchronously with the rotating shaft 410, which can dissipate heat for the drive motor itself and reduce the temperature rise of the winding of the drive motor by 30K or more. Under the dehydration condition, the first impeller 100 is separated from the rotating shaft 410, and the first impeller 100 does not rotate, which can avoid the aerodynamic noise and windage loss caused by the high speed, so that the additional shaft power consumption is less than 0.2W, reducing the impact on the output power of the drive motor.

[0060] It can be understood that in other embodiments, the coupling 222 can be set as an elongated structure and rotatably mounted on the mounting seat 210. Specifically, based on the fact that the clutch component 220 is located on the outside of the sleeve 110, one end of the coupling 222 is rotatably mounted on the mounting seat 210, and the other end is connected to the mounting seat 210 through the elastic member 221, and the direction of the force applied by the elastic member 221 to the coupling 222 is toward the center line Z of the first impeller 100. The coupling portion 2221 is arranged between the two ends of the coupling 222 and protrudes toward the center line Z of the first impeller 100 to cooperate with the transmission portion 120. Therefore, the center of mass of the coupling portion 2221 and the coupling portion 222 are located on the same side of the reference plane passing through the rotation axis of the coupling portion 222. As the coupling 222 rotates, the center of mass of the coupling portion 2221 and the coupling portion 222 will inevitably offset in the same direction. Under the action of the elastic member 221, the coupling portion 2221 can be driven to couple with the transmission portion 120. At this time, when the rotating shaft 410 rotates, the centrifugal force F 4 The direction of F is radially outward along the rotating shaft 410. Therefore, similarly, when the rotating shaft 410 does not rotate, F 4 = 0, the coupling member 222 is only subjected to the force exerted by the elastic member 221, and the coupling member 222 is coupled to the transmission part 120. 2 When the elastic member 221 exerts a force F on the coupling member 222 in the radial direction of the rotating shaft 410 3 With centrifugal force F 4 equal, the coupling member 222 and the transmission part 120 remain coupled, and the first impeller 100 rotates with the rotating shaft 410. Therefore, when the rotating speed of the rotating shaft 410 is less than N 2 When F 4 <F 3 , the coupling member 222 and the transmission part 120 remain coupled, and the first impeller 100 rotates with the shaft 410; when the rotation speed of the shaft 410 is greater than N 2 When F 4 >F 3 , the coupling portion 2221 of the coupling member 222 is separated from the transmission portion 120, and the first impeller 100 does not rotate.

[0061] It can be understood that when the direction of the force applied by the elastic member 221 to the coupling member 222 is radially inward along the rotation shaft 410, F 3 is the force exerted by the elastic member 221 on the coupling member 222. When the direction of the force exerted by the elastic member 221 on the coupling member 222 is inclined relative to the radial direction of the rotating shaft 410, F 3 It is the component of the force applied by the elastic member 221 to the coupling member 222 in the radial direction of the rotating shaft 410 .

[0062] It is understandable that in other embodiments, the first impeller 100 may not be provided with the sleeve 110, and the transmission part 120 is provided on one side of the first impeller 100 along the centerline direction, and the transmission part 120 is a recessed part with an opening facing radially outward or a convex part protruding radially outward, and the coupling member 222 is slidably mounted on the mounting seat 210 along the radial direction of the rotating shaft 410, and one end of the coupling member 222 facing the first impeller 100 (i.e., the coupling part 2221) extends out of the mounting seat 210, and the coupling part 2221 is located on the radial outer side of the transmission part 120 along the first impeller 100. Therefore, when the coupling member 222 moves along the radial direction of the rotating shaft 410, the coupling part 2221 can be combined with or separated from the transmission part 120, that is, the rotating shaft 410 is combined with or separated from the first impeller 100, which will not be described in detail here.

[0063] Reference Figure 4 and Figure 5 As shown, it can be understood that the clutch mechanism 200 includes a plurality of clutch components 220. For example, the clutch mechanism 200 includes two clutch components 220, and the two clutch components 220 are arranged symmetrically about the center line Z of the first impeller 100. Correspondingly, the first impeller 100 is provided with a transmission part 120 arranged one-to-one with the clutch components 220. Therefore, when the clutch mechanism 200 is combined with the first impeller 100, the coupling parts 222 of the two clutch components 220 are respectively combined with the two transmission parts 120, so that the clutch mechanism 200 applies forces to two places of the first impeller 100 during rotation, and the forces at the two places are balanced in the radial direction of the first impeller 100, so that the first impeller 100 is balanced in the radial direction, so that the first impeller 100 is prevented from vibrating and generating noise during the rotation process, and at the same time, it is beneficial to improve the reliability of the combination of the clutch mechanism 200 and the first impeller 100. Of course, the number of the clutch components 220 can also be three, four or more, which will not be repeated here.

[0064] Reference Figure 4 As shown, it can be understood that the transmission part 120 is long and extends along the center line direction of the first impeller 100. For example, the transmission part 120 is provided as a long groove arranged along the center line direction of the first impeller 100, or the transmission part 120 is provided as a long convex rib arranged along the center line direction of the first impeller 100. Therefore, when the coupling member 222 is combined with the transmission part 120, the coupling member 222 can be combined with any point of the transmission part 120 along the center line direction of the first impeller 100, thereby increasing the allowable installation error range of the clutch mechanism 200 in the center line direction of the first impeller 100, reducing the installation difficulty and facilitating assembly.

[0065] Reference Figure 6As shown, it can be understood that in other embodiments, the sleeve 110 is sleeved on the outer periphery of the mounting seat 210, based on which, the transmission part 120 is arranged on the inner peripheral wall of the sleeve 110, and the clutch member 220 is located inside the sleeve 110. Specifically, the coupling member 222 includes a rod 2222 and a head 2223, the head 2223 is connected to one end of the rod 2222, and the outer diameter of the head 2223 is greater than the outer diameter of the rod 2222, and the end of the rod 2222 away from the head 2223 is the coupling member 2221. The coupling member 222 is slidably installed in the slide groove 211 of the mounting seat 210 along the radial direction of the rotating shaft 410, and the length direction of the rod 2222 is parallel to the sliding direction, and the coupling member 2221 can extend out of the opening of the slide groove 211. Since the head 2223 is disposed at one end of the rod 2222, the center of mass of the coupling member 222 is biased toward one end of the head 2223, so that the center of mass of the coupling member 222 and the coupling portion 2221 are respectively located on both sides of the reference plane passing through the center line Z of the first impeller 100. The elastic member 221 is installed between the head 2223 and the end cover 212 at the other end of the slide slot 211, and the elastic member 221 exerts a force F on the head 2223. 5 The direction is radially inward along the rotating shaft 410. Therefore, the force F of the elastic member 221 5 Under the condition that the center of mass of the coupling member 222 is driven to move toward the center line Z of the first impeller 100, and the coupling portion 2221 moves in a direction away from the center line Z of the first impeller 100, so that the coupling portion 2221 extends out of the opening of the slide groove 211 to be coupled with the transmission portion 120.

[0066] Reference Figure 6 As shown, it can be understood that when the shaft 410 rotates, the coupling member 222 is subjected to a centrifugal force F at the center of mass. 6 The direction of the centrifugal force at the mass center is radially outward along the rotating shaft 410. That is, at the mass center of the coupling member 222, the force F exerted by the elastic member 221 on the coupling member 222 is 5 With centrifugal force F 6 The direction of the centrifugal force F 6 Under the action of , the center of mass can be driven to move in a direction away from the center line Z of the first impeller 100, and the connecting portion 2221 moves toward the center line Z of the first impeller 100, so that the connecting portion 2221 is separated from the transmission portion 120 and retracted into the slide groove 211.

[0067] Therefore, similarly, when the shaft 410 does not rotate, F 6 = 0, the coupling member 222 is only subjected to the force F exerted by the elastic member 221 5 , the coupling member 222 is coupled to the transmission part 120. When the rotation speed of the rotating shaft 410 is the critical speed N 3 When the elastic member 221 exerts a force F on the coupling member 2225 With centrifugal force F 6 equal, the coupling member 222 and the transmission part 120 remain coupled, and the first impeller 100 rotates with the rotating shaft 410. Therefore, when the rotating speed of the rotating shaft 410 is less than N 3 When F 6 <F 5 , the coupling member 222 and the transmission part 120 remain coupled, and the first impeller 100 rotates with the shaft 410; when the rotation speed of the shaft 410 is greater than N 3 When F 6 >F 5 , the coupling member 222 is separated from the transmission part 120, and the first impeller 100 does not rotate.

[0068] It can be understood that in other embodiments, based on the sleeve 110 being sleeved on the outer periphery of the mounting seat 210, the transmission part 120 being arranged on the inner peripheral wall of the sleeve 110, and the clutch member 220 being located inside the sleeve 110, the coupling member 222 is in an elongated structure and is rotatably mounted on the mounting seat 210, the coupling member 222 is located as a whole on one side of the reference plane passing through the center line Z of the first impeller 100, the rotation center of the coupling member 222 itself is located between the two ends, and a coupling portion 2221 is provided at one end of the coupling member 222, and the coupling portion 2221 faces away from the first impeller 100. 0, and the other end is connected to the mounting seat 210 with an elastic member 221. The center of mass of the coupling member 222 and the coupling portion 2221 are respectively located on both sides of the rotation center, that is, the elastic member 221 and the center of mass are located on the same side of the rotation center. The elastic member 221 applies a force toward the center line Z of the first impeller 100 to one end of the coupling member 222, so as to drive the center of mass to deviate toward the center line Z of the first impeller 100, and the coupling portion 2221 deviates in a direction away from the center line Z of the first impeller 100, so that the coupling portion 2221 is coupled with the transmission portion 120. When the rotating shaft 410 rotates, the center of mass of the coupling portion 2221 is acted upon by centrifugal force. Under the action of the centrifugal force, the center of mass can be driven to deviate in a direction away from the center line Z of the first impeller 100, and the coupling portion 2221 deviates toward the center line Z of the first impeller 100, so that the coupling portion 2221 is separated from the transmission portion 120. The matching state between the coupling portion 2221 and the transmission portion 120 when the rotating shaft 410 is at different rotation speeds will not be described in detail herein.

[0069] It is understandable that in other embodiments, the first impeller 100 may not be provided with the sleeve 110, and the clutch mechanism 200 is disposed in the hollow structure of the first impeller 100. The connection structure can refer to the connection structure when the sleeve 110 is sleeved on the outer periphery of the mounting seat 210, and will not be repeated here.

[0070] Reference Figure 2As shown, an embodiment of the present invention further provides a driving device, which includes a motor body 400 and an impeller assembly of any one of the above-mentioned embodiments. The motor body 400 here can be a driving motor on a washing machine. The motor body 400 is provided with a rotating shaft 410, and the impeller assembly is installed on the rotating shaft 410, which will not be repeated here.

[0071] Since the driving device adopts all the technical solutions of the impeller assembly of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment.

[0072] Reference Figure 2 As shown, it can be understood that, since the first impeller 100 does not rotate in the second state of high speed, it is impossible to dissipate heat for the motor body 400. To this end, the driving device also includes a second impeller 300, which is fixedly mounted on the rotating shaft 410 and can rotate with the rotating shaft 410. Exemplarily, the second impeller 300 and the first impeller 100 are respectively located at the two ends of the motor body 400 along the axial direction, or the second impeller 300 and the first impeller 100 are both located at the same end of the motor body 400 along the axial direction. In order to avoid the first impeller 100 blocking the wind of the second impeller 300, the second impeller 300 is closer to the motor body 400 than the first impeller 100. In order to avoid the aerodynamic noise and wind resistance loss caused by the second impeller 300 at high speed, the outer diameter of the second impeller 300 is smaller than the outer diameter of the first impeller 100. Generally speaking, at high speed, the larger the outer diameter of the second impeller 300, the better the heat dissipation effect, but the greater the aerodynamic noise and wind resistance loss. On the contrary, the worse the heat dissipation effect, the smaller the aerodynamic noise and wind resistance loss. For impellers with the same outer diameter, the higher the speed, the better the heat dissipation effect, and vice versa. Therefore, making the outer diameter of the second impeller 300 smaller can reduce the aerodynamic noise and wind resistance loss caused by high speed. At the same time, at high speed, the second impeller 300 with a smaller outer diameter can also effectively dissipate heat for the motor body 400.

[0073] Reference Figure 2 As shown, it can be understood that the outer diameter of the first impeller 100 is defined as D 1 , the outer diameter of the second impeller 300 is D 2 For the motor body 400 having at least two different speed gears, the speed at the low speed gear (ie, the clutch mechanism 200 is in the first state) is defined as V 1 , the speed at the high speed gear (i.e. the clutch mechanism 200 is in the second state) is V 2 . Satisfied: D 1 / D 2 =V 2 / V 1. That is to say, the ratio of the outer diameter of the first impeller 100 to that of the second impeller 300 is equal to the ratio of the speed corresponding to the high speed gear to the speed corresponding to the low speed gear. Therefore, at the low speed gear, the first impeller 100 is combined with the rotating shaft 410 and rotates with the rotating shaft 410. The outer diameter of the first impeller 100 is relatively large, and the heat dissipation effect is obvious. The heat dissipation of the motor body 400 mainly depends on the first impeller 100. The second impeller 300 also rotates with the rotating shaft 410. The outer diameter of the second impeller 300 is relatively small, and it also has a certain heat dissipation effect on the motor body 400. At the high speed gear, the first impeller 100 is separated from the rotating shaft 410, the first impeller 100 does not rotate, and the second impeller 300 rotates at high speed with the rotating shaft 410. At this time, the air volume of the second impeller 300 is equivalent to the air volume of the first impeller 100 at low speed, which effectively dissipates the heat of the motor body 400 itself. Therefore, no matter in low speed gear or high speed gear, the motor body 400 can be effectively cooled, and at the same time, the aerodynamic noise and wind resistance loss caused by high speed can be reduced, thereby reducing the impact on the output power of the motor body 400.

[0074] Of course, it is understandable that the second impeller 300 can be a component directly processed on the rotating shaft 410, or the second impeller 300 can be integrated on the pulley, where the pulley is a component installed on the rotating shaft 410 in the washing machine and used to drive the drum or impeller to rotate.

[0075] An embodiment of the present invention further provides a washing machine, comprising the driving device of any one of the above embodiments.

[0076] Since the washing machine adopts all the technical solutions of the driving device of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment.

[0077] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A driving device, characterized in that: include: The motor body is provided with a rotating shaft; A first impeller, mounted on the rotating shaft and rotating relative to the rotating shaft; a clutch mechanism, fixedly mounted on the rotating shaft, wherein when the clutch mechanism is in a first state, the clutch mechanism rotates synchronously with the first impeller, and when the clutch mechanism is in a second state, the clutch mechanism is separated from the first impeller; A second impeller is an integral structure with the rotating shaft, and the outer diameter of the second impeller is smaller than the outer diameter of the first impeller; Wherein, when the clutch mechanism is in the first state, the rotation speed of the motor body is V1, and when the clutch mechanism is in the second state, the rotation speed of the motor body is V2, satisfying: V1<V2.

2. The driving device according to claim 1, characterized in that: The outer diameter of the first impeller is D1, and the outer diameter of the second impeller is D2, which satisfies: D1 / D2=V2 / V1.

3. The driving device according to claim 1 or 2, characterized in that: The first impeller and the second impeller are located at one end of the motor body along the axial direction of the rotating shaft, and the second impeller is closer to the motor body than the first impeller; Alternatively, the first impeller and the second impeller are respectively located at two ends of the motor body along the axial direction of the rotating shaft.

4. The driving device according to claim 1, characterized in that: The clutch mechanism includes a mounting seat and a clutch component, the clutch component includes an elastic member and a coupling member, the mounting seat is suitable for being connected to the rotating shaft, the coupling member is movably mounted on the mounting seat, the elastic member is arranged on the mounting seat, the first impeller includes a transmission part, when the clutch mechanism is in the first state, the elastic member can drive the coupling member to deviate so that the coupling member is combined with the transmission part, and when the clutch mechanism is in the second state, the coupling member can deviate in the reverse direction and be separated from the transmission part.

5. The driving device according to claim 4, characterized in that: The combining member is slidably mounted on the mounting seat, and an angle between a sliding direction of the combining member and a center line of the first impeller is greater than 0°.

6. The driving device according to claim 5, characterized in that: The coupling member is located on one side of a reference plane passing through the center line of the first impeller. When the clutch mechanism is in the first state, the elastic member can drive the coupling member to move toward the center line of the first impeller.

7. The driving device according to claim 5, characterized in that: The clutch mechanism includes a plurality of clutch components, and the plurality of clutch components are arranged symmetrically about a center line of the first impeller.

8. The driving device according to claim 5, characterized in that: The coupling member is provided with a coupling portion, and the center of mass of the coupling member and the coupling portion are respectively located on both sides of a reference plane passing through the center line of the first impeller. When the clutch mechanism is in the first state, the elastic member can drive the center of mass to move toward the center line of the first impeller, and the coupling portion moves in a direction away from the center line of the first impeller.

9. The driving device according to claim 8, characterized in that: The coupling member includes a rod and a head, wherein the head is connected to one end of the rod, and the other end of the rod is provided with the coupling portion. The outer diameter of the head is greater than the outer diameter of the rod, and the head and the coupling portion are respectively located on both sides of the reference plane.

10. The driving device according to claim 4, characterized in that: The transmission portion is a convex portion, and the coupling member can abut against one side of the convex portion along the circumferential direction of the first impeller.

11. The driving device according to claim 4, characterized in that: The transmission portion is a recessed portion, and the coupling member can be partially accommodated in the recessed portion.

12. The driving device according to claim 4, 10 or 11, characterized in that: The transmission part is in an elongated strip shape and extends along the center line direction of the first impeller.

13. The driving device according to claim 4, characterized in that: The first impeller is provided with a sleeve, the sleeve extends along the center line direction of the first impeller, the transmission part is arranged on the sleeve, the mounting seat is sleeved on the outer periphery of the sleeve, or the sleeve is sleeved on the outer periphery of the mounting seat.

14. The driving device according to claim 1, characterized in that: The first impeller is provided with a bearing, and the first impeller is suitable for being mounted on the rotating shaft through the bearing.

15. A washing machine, characterized in that Comprising a drive device as claimed in any one of claims 1 to 14.

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