CN106968083B - Washing machine speed reducer and washing machine - Google Patents
Washing machine speed reducer and washing machine Download PDFInfo
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- CN106968083B CN106968083B CN201710254267.7A CN201710254267A CN106968083B CN 106968083 B CN106968083 B CN 106968083B CN 201710254267 A CN201710254267 A CN 201710254267A CN 106968083 B CN106968083 B CN 106968083B
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- arm
- pawl
- ratchet wheel
- restraint
- constraint
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/30—Driving arrangements
- D06F37/40—Driving arrangements for driving the receptacle and an agitator or impeller, e.g. alternatively
Abstract
The invention relates to a washing machine speed reducer and a washing machine, wherein the washing machine speed reducer comprises a ratchet wheel, a pawl matched with the ratchet wheel and a speed reducing arm for driving the pawl to disengage; the pawl is connected with a pawl arm extending towards the periphery of the ratchet wheel, the pawl arm is in transmission connection with a speed reduction arm through a restraint arm, one end of the restraint arm is in contact with one side face of the pawl arm, the speed reduction arm pushes the restraint arm to rotate, and the restraint arm drives the pawl arm to move so that the pawl is separated from the ratchet wheel; the contact surface of the pawl arm is a curved surface which is curved from the critical constraint point at the middle part to two sides with different curvatures respectively. The contact surface of the pawl arm and the constraint arm is set to be a curved surface formed by different curvatures at two ends, so that the curved surfaces at two sides of the critical constraint point of the constraint arm can respectively generate different actions, the relative position is kept unchanged when the pawl arm and the ratchet wheel are pushed to be separated to a certain distance, the stroke of the pawl is reduced, and the occurrence of the mutual interference between the pawl arm and a stator of a driving motor of the washing machine is avoided.
Description
Technical Field
The invention belongs to the technical field of washing machines, particularly relates to a speed reducer of a washing machine, and particularly relates to a speed reducer of a washing machine, which has a small stroke range and does not interfere with a stator of a driving motor of the washing machine.
Background
In the prior art, a washing machine generally comprises an outer barrel and an inner barrel, wherein a driving motor is arranged at the bottom of the outer barrel, and comprises a rotor and a stator; the rotor of the driving motor is meshed with the inner barrel and/or the impeller through the speed reduction clutch to drive the inner barrel and/or the impeller to rotate, and clothes in the inner barrel are washed. The speed reduction clutch comprises a speed reducer and a clutch, and is arranged between the driving motor and the bottom of the outer barrel; the clutch distributes the rotor output power of the driving motor to the inner barrel and/or the impeller so as to realize the control of the power transmission direction; the reducer is connected with an output shaft of the rotor of the driving motor for outputting power so as to control the reducer, and further brake or freely act the output shaft, thereby realizing the purpose of controllable braking when the inner barrel and/or the impeller of the washing machine rotate.
Since the speed reducer is installed between the driving motor and the bottom of the outer tub and the driving motor stator has a certain height, the installation space of the speed reducer is restricted, and in order to reduce the overall space of the washing machine, the speed reducer is generally installed in the hollow part of the annular stator of the driving motor. The pawl component of the speed reducer is also provided with a certain height, particularly, the stator of the driving motor is generally hollow and annular with a certain height, and the speed reducer and the stator are concentric and correspondingly arranged between the stator and the bottom of the outer barrel, so that a height overlapping area in a certain range exists between the pawl and the stator.
Meanwhile, in the existing washing machine, in order to save washing machine components and reduce the production cost of the washing machine, a speed reduction arm of a speed reducer is drawn by an electric integrated valve; the electric integrated valve has two action strokes, the first stroke of the electric integrated valve is ratchet wheel and pawl separation, and the washing machine does not dewater at the moment; the second stroke of the electric integrated valve is that the electric integrated valve continues to move to pull open the drain valve for draining water, and the pawl which can be caused during the stroke continuously moves away from the direction of the ratchet wheel, so that the pawl possibly interferes with the motor stator in the moving process, and the speed reducer is easily caused to perform misoperation, damage and other conditions.
The present application is particularly proposed in view of the above-mentioned technical drawbacks of the prior art washing machines.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a reducer of a washing machine and the washing machine. According to the reducer of the washing machine, the contact surface of the transmission structure of the reducer is set to be a curved surface formed by two sections of different curvatures, so that the problems of reducing the stroke of the transmission structure and preventing the pawl from acting excessively and increasing the installation space of the reducer are solved, and the purposes of reducing the stroke space of the reducer, providing stability in the operation process and preventing the reducer from being mistakenly operated due to interference are achieved.
In order to solve the technical problems and achieve the technical effects, the basic design idea of the technical scheme adopted by the invention is as follows:
the washing machine speed reducer comprises a ratchet wheel, a pawl matched with the ratchet wheel and a speed reducing arm for driving the pawl to disengage; the pawl is connected with a pawl arm extending towards the periphery of the ratchet wheel, the pawl arm is in transmission connection with a speed reduction arm through a restraint arm, one end of the restraint arm is in contact with one side face of the pawl arm, the speed reduction arm pushes the restraint arm to rotate, and the restraint arm drives the pawl arm to move so that the pawl is separated from the ratchet wheel; the contact surface of the pawl arm is a curved surface which is curved from the critical constraint point at the middle part to two sides with different curvatures respectively.
Furthermore, the pawl arm, the constraint arm and the speed reduction arm are respectively arranged on the speed reducer shell through corresponding rotating shafts which are arranged in parallel, so that the pawl arm, the constraint arm and the speed reduction arm can rotate relative to the speed reducer shell.
Furthermore, reset torsion springs for driving reset are respectively arranged at the hinges of the ratchet arm and/or the restraint arm and/or the speed reduction arm and the speed reduction shell, and provide reset driving force for the ratchet arm, the restraint arm and the speed reduction arm so as to ensure that the ratchet arm and the restraint arm, and the restraint arm and the speed reduction arm are always in contact;
preferably, the return force provided by each return torsion spring directly or indirectly drives the pawl into engagement with the ratchet.
Furthermore, one side of the pawl arm is in contact with one end of the constraint arm, the contact surface of the pawl arm comprises a first curved surface and a second curved surface which are connected, the first curved surface and the second curved surface are both bent towards the direction far away from the constraint arm, and the joint of the first curved surface and the second curved surface is a critical constraint point closest to the constraint arm.
Further, the middle part of the pawl arm is hinged with the speed reducer shell, so that the restraint arm pushes the pawl arm to rotate, the contact point position of the restraint arm and the pawl arm is changed, and the pawl is meshed with or separated from the ratchet wheel.
Further, when the initial position of the contact point of the pawl arm and the constraint arm is on the first curved surface and is far away from the critical constraint point, the pawl is meshed with the ratchet wheel; the constraint arm pushes the pawl arm to rotate, and when a contact point of the pawl arm and the constraint arm is in the first curved surface and gradually approaches a critical constraint point, the pawl and the ratchet wheel are gradually separated; when the limiting contact point of the pawl arm and the constraint arm is a second curved surface, the pawl is disengaged from the ratchet wheel.
Further, the curvature of the second curved surface gradually decreases from the critical constraining point to the other end, so that the disengagement distance between the pawl and the ratchet does not increase when the contact point of the pawl arm and the constraining arm is at the second curved surface. Preferably, the second curved surface is an end circular arc line which takes the constraint point rotating shaft as a circle, so that when the contact point of the pawl arm and the constraint arm is positioned on the second curved surface, the disengagement distance between the pawl and the ratchet wheel cannot be changed.
Furthermore, the middle part of the pawl arm is rotatably connected with the speed reducer shell through a vertically arranged rotating shaft, a pawl which is correspondingly meshed with the ratchet wheel is arranged at the first end of the pawl arm, and a contact surface which is contacted with the restraint arm is formed at one side of the second end of the pawl arm; the pawl arm between the first end and the rotating shaft is bent towards the outer periphery of the ratchet wheel to limit the action of the restraint arm and prevent the over-displacement.
Furthermore, one end of the pawl arm is in contact with one side of the constraint arm, the contact surface of the constraint arm comprises a first curved surface and a second curved surface which are connected, the first curved surface and the second curved surface are both bent towards the direction far away from the constraint arm, and the joint of the first curved surface and the second curved surface is a critical constraint point closest to the constraint arm.
In order to solve the above technical problems and achieve the above technical effects, another basic design idea of the technical scheme adopted by the invention is as follows:
the washing machine speed reducer comprises a ratchet wheel, a pawl matched with the ratchet wheel and a speed reducing arm for driving the pawl to disengage; the pawl is connected with a pawl arm extending towards the periphery of the ratchet wheel, the pawl arm is directly in transmission connection with the speed reduction arm, one side of the pawl arm is in contact with one end of the speed reduction arm, and the speed reduction arm pushes the pawl arm to move so that the pawl is separated from the ratchet wheel; one end of the speed reducing arm is in contact with one side surface of the pawl arm, and the contact surface of the pawl arm is a curved surface which is bent from the middle critical constraint point to two sides with different curvatures respectively.
Another important object of the present invention is to provide a washing machine with the reducer, so as to solve the problem of interference between the reducer and the stator of the driving motor of the washing machine when the reducer performs control operation.
In order to achieve the purpose of the invention, the specific technical scheme is as follows:
a washing machine is provided with any one of the washing machine speed reducers, a speed reducing arm of the washing machine speed reducer is in traction connection with an electric integrated valve, and the electric integrated valve drives the speed reducing arm, the speed reducing arm to push a restraint arm and a restraint arm to push a pawl arm to move so that the pawl is disengaged or engaged with a ratchet wheel; the ratchet wheel is meshed with the output shaft of the driving motor of the washing machine, so that the rotating speed of the output shaft of the driving motor is reduced until braking is achieved when the pawl is meshed with the ratchet wheel.
When the washing machine works normally, the electric integrated valve pulls the speed reduction arm, the speed reduction arm pushes the restraint arm, the restraint arm further pushes the pawl arm to move, the pawl is separated from the ratchet wheel, the rotor of the washing machine driving motor drives the output shaft to rotate, and the output shaft carries out power distribution through the clutch so as to drive the inner barrel and/or the impeller of the washing machine to rotate, so that the aim of washing clothes is fulfilled.
When the washing machine stops working or brakes power output, the electric integrated valve does not pull the speed reduction arm any more, so that the speed reduction arm, the restraint arm and the pawl arm are reset to the initial position under the driving of the reset torsion spring to drive the pawl to be meshed with the ratchet wheel, and further the rotating speed of a rotor of the driving motor meshed with the ratchet wheel is slowed down until braking.
Meanwhile, when the washing machine executes a dehydration program, the electric integrated valve executes a second stroke, the ratchet wheel is separated from the pawl, the electric integrated valve pulls the drain valve of the washing machine and continues to pull the decelerating arm, the decelerating arm pushes the restraining arm, the restraining arm slides in the second curved surface of the pawl arm, the position of the pawl arm is kept unchanged relatively, the separation distance between the pawl and the ratchet wheel is kept unchanged, and the condition that the pawl is interfered with the stator of the driving motor is prevented.
Compared with the washing machine in the prior art, the washing machine of the invention has the following beneficial effects:
the contact surface of the pawl arm and the constraint arm is set to be curved surfaces which are respectively bent from the middle critical constraint point to two sides with different curvatures, so that the curved surfaces of the constraint arm at the two sides of the critical constraint point can respectively push the pawl arm to move or do not push the pawl arm and keep still, the relative position is kept unchanged when the pawl arm and the ratchet wheel are pushed to be separated to a certain distance, and the condition that the pawl arm and the driving motor stator mutually interfere is avoided. Meanwhile, the pawl of the speed reducer is controlled by three parts which are sequentially contacted with each other end to end through the pawl arm, the restraint arm and the speed reducing arm, and the extension directions of the three control arms are staggered with each other, so that the transmission distance of the pawl is increased, and the control precision of the speed reducer is obviously improved.
In order to make the design concept of the technical scheme of the invention clearer and facilitate further understanding of the beneficial effects brought by the technical scheme, the following detailed description of some specific embodiments of the invention is made with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 to 3 are schematic structural views of a decelerator of a washing machine in an embodiment of the present invention;
FIG. 4 is a schematic sectional view of a decelerator of a washing machine according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a decelerator of a washing machine according to an embodiment of the present invention when the decelerator is not braked;
fig. 6 is a schematic sectional view illustrating a decelerator of a washing machine braking in accordance with another embodiment of the present invention.
The figure is marked with:
1. a ratchet wheel; 2. a pawl; 3. a pawl arm; 4. a restraint arm; 5. a deceleration arm; 6. a first return torsion spring; 7. a second return torsion spring; 8. a third return torsion spring; 9. a reducer housing; 30. a critical constraint point; 31. a first curved surface; 32. a second curved surface.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, 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 with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment of the invention discloses a washing machine, which comprises an outer barrel and an inner barrel, wherein a driving motor is arranged at the bottom of the outer barrel and comprises a rotor and a stator; the rotor of the driving motor is meshed with the inner barrel and/or the impeller through the speed reduction clutch to drive the inner barrel and/or the impeller to rotate, and clothes in the inner barrel are washed. The speed reduction clutch comprises a speed reducer and a clutch, and is arranged between the driving motor and the bottom of the outer barrel; the clutch distributes the rotor output power of the driving motor to the inner barrel and/or the impeller so as to realize the control of the power transmission direction; the reducer is connected with an output shaft of the rotor of the driving motor for outputting power so as to control the reducer, and further brake or freely act the output shaft, thereby realizing the purpose of controllable braking when the inner barrel and/or the impeller of the washing machine rotate.
Because the speed reducer is arranged between the driving motor and the bottom of the outer barrel, and the stator of the driving motor has a certain height, the installation space of the speed reducer is restricted; meanwhile, the pawl 1 part of the speed reducer is also provided with a certain height, particularly, the stator of the driving motor is generally hollow and annular with a certain height, and the speed reducer and the stator are concentric and correspondingly arranged between the stator and the bottom of the outer barrel, so that a height overlapping area in a certain range exists between the pawl 1 and the stator. When the speed reducer is operated, after the pawl 1 is separated from the ratchet 2, when the electric integrated valve pulls the speed reducing arm to generate a second stroke movement, the pawl can be caused to continuously move away from the ratchet, and the pawl and the motor stator can be interfered in the movement process.
In the embodiment of the invention, the speed reducer with the contact surface of the pawl arm and other control arms being two sections of different curvatures to form the curved surface is arranged on the washing machine, so that when the speed reducing arm of the speed reducer moves for the second stroke, the relative position between the pawl and the ratchet wheel is fixed, and the condition that the pawl interferes with the stator of the driving motor of the washing machine due to the traction of the electric integrated valve is avoided.
Example one
As shown in fig. 1 to 5, in the present embodiment, a reducer for a washing machine is disclosed, which includes a ratchet 2, and the ratchet 2 is engaged and fixed with a power output shaft of a rotor of a driving motor of the washing machine, so that the ratchet 2 rotates along with the power output shaft; the pawl 1 is matched with the ratchet wheel 2, and the pawl 1 is meshed with the ratchet wheel 2 to provide braking resistance for the ratchet wheel 2, so that the rotation of a power output shaft of a motor rotor driven by the washing machine is reduced until the purpose of braking the power output shaft is achieved. The pawl 1 is connected with a pawl arm 3, the pawl arm 3 extends along the radial direction of the ratchet wheel 2, the pawl arm 3 is in transmission with a speed reducing arm 5 through a constraint arm 4, and the pawl arm 3 is in contact with the constraint arm 4; one end of the pawl arm 3 is in contact with one side surface of the restraint arm 4, the deceleration arm 5 pushes the restraint arm 4 to rotate, and the restraint arm 4 drives the pawl arm 3 to move so that the pawl 1 is separated from the ratchet wheel 2; the corresponding side surface of the restraint arm 4 is a contact surface which is contacted with the pawl arm 3, and the contact surface is a curved surface which is bent from a middle critical restraint point to two sides with different curvatures respectively.
The contact surface of the pawl arm 3 and the constraint arm 4 is set to be curved surfaces which are respectively bent from the middle critical constraint point to two sides with different curvatures, so that the curved surfaces of the constraint arm 4 at two sides of the critical constraint point can respectively push the pawl arm 3 to move or not push the pawl arm 3 and keep still, the relative position is kept unchanged when the pawl arm 3 and the ratchet wheel 2 are pushed to be separated to a certain distance, and the condition that the pawl arm 3 and a driving motor stator generate mutual interference is further avoided. Simultaneously, because the pawl 1 of reduction gear is controlled through the mutual contact's of pawl arm 3, restraint arm 4 and 5 three parts of end to end in proper order, the extending direction of three control arm is crisscross each other for the transmission distance of pawl 1 increases, and then makes the control accuracy of reduction gear obtain showing and improving.
In this embodiment, the ratchet arm 3, the restraint arm 4, and the deceleration arm 5 are respectively mounted on the reducer case 9 through corresponding rotating shafts arranged in parallel, so that the ratchet arm 3, the restraint arm 4, and the deceleration arm 5 can rotate relative to the reducer case 9. The middle part of the pawl arm 3 is hinged with the speed reducer shell 9, one end of the pawl arm is fixedly arranged with the pawl 1, and the other end of the pawl arm extends outwards along the radial direction of the ratchet 2; the middle part of the restraint arm 4 is hinged with the reducer shell 9, one end of the restraint arm is contacted with the outward extending end of the pawl arm 3, and the other end of the restraint arm is contacted with one end of the speed reducing arm 5; the middle part of the speed reducing arm 5 is hinged with the speed reducer shell 9, one end of the speed reducing arm is contacted with the corresponding end of the restraint arm 4, and the other end of the speed reducing arm is connected with the output end of the electric integrated valve of the speed reducer. Therefore, after the output end of the electric integrated valve moves, the speed reduction arm 5 is pulled to move, the restraint arm 4 is further pushed to rotate, the pawl arm 3 is pushed to select, and finally the pawl 1 is driven to move to be separated from the ratchet 2.
In this embodiment, the hinge points of the ratchet arm 3 and/or the restraint arm 4 and/or the deceleration arm 5 and the reducer housing 9 are respectively provided with a reset torsion spring for driving reset, and the reset torsion springs provide reset driving force for the ratchet arm 3, the restraint arm 4 and the deceleration arm 5 so as to ensure that the ratchet arm 3 and the restraint arm 4, and the restraint arm 4 and the deceleration arm 5 are always in contact; preferably, the return force provided by each return torsion spring directly or indirectly drives the pawl 1 into engagement with the ratchet 2. Preferably, a first reset torsion spring 6 is arranged at a hinge joint between the pawl arm 3 and the reducer housing 9, and two ends of the first reset torsion spring 6 are respectively fixed with the pawl arm 3 and the reducer housing 9 to limit the action of the pawl arm 3 and provide a rotating acting force for the pawl arm 3 to the engagement direction of the pawl 1 and the ratchet 2; a second reset torsion spring 7 is arranged at the hinged position between the restraint arm 4 and the speed reducer shell 9, and two ends of the second reset torsion spring 7 are respectively fixed with the restraint arm 4 and the speed reducer shell 9 so as to limit the action of the restraint arm 4 and provide a rotating acting force for the restraint arm 4 to push the pawl arm 3 to move towards the direction in which the pawl 1 is meshed with the ratchet wheel 2; the hinged position between the speed reduction arm 5 and the speed reducer shell 9 is provided with a third reset torsion spring 8, two ends of the third reset torsion spring 8 are respectively fixed with the speed reduction arm 5 and the speed reducer shell 9 so as to limit the action of the speed reduction arm 5 and provide rotating acting force for the speed reduction arm 5 to push the pawl arm 3 to move towards the direction of meshing the pawl 1 and the ratchet wheel 2 through the restraint arm 4.
Meanwhile, after the pawl arm 3 is pushed by the restraint arm 4 to generate action until the pawl 1 is disengaged from the ratchet 2, the first reset torsion spring 6 provides reset acting force for the pawl arm 3 so as to push the pawl arm 3 to reset to an initial position when the driving motor stops acting, and the pawl 1 is meshed with the ratchet 2; after the restraint arm 4 is pushed by the deceleration arm 5 to act, the second reset torsion spring 7 provides reset acting force for the restraint arm 4 so as to push the restraint arm 4 to reset to the initial position when the driving motor stops acting; after the deceleration arm 5 is pulled by the electric integrated valve to act, the third reset torsion spring 8 provides a reset acting force for the deceleration arm 5 to push the deceleration arm 5 to reset to the initial position when the driving motor stops acting.
In this embodiment, one side of the ratchet arm 3 is in contact with one end of the constraint arm 4, so that one end of the constraint arm 4 generates relative motion at one side of the ratchet arm 3, thereby achieving the purpose that the constraint arm 4 pushes the ratchet arm 3 to generate motion. One side of the ratchet arm 3, which is contacted with the restraint arm 4, forms a contact surface of the ratchet arm 3; the contact surface of the pawl arm 3 comprises a first curved surface 31 and a second curved surface 32 which are connected, the first curved surface 31 and the second curved surface 32 are both bent towards the direction far away from the constraint arm 4, and the joint of the first curved surface 31 and the second curved surface 32 is the critical constraint point 30 closest to the constraint arm 4.
In this embodiment, the bending curvature of the first curved surface 31 is greater than the bending curvature of the second curved surface 32, so that when the contact position of the pawl arm 3 and the constraint arm 4 is the critical constraint point 30, the displacement distance generated by pushing the pawl arm 3 is the largest, and at this time, the separation distance between the pawl 1 and the ratchet 2 is the farthest.
In this embodiment, the middle of the pawl arm 3 is hinged to the reducer housing 9, so that the restraint arm 4 pushes the pawl arm 3 to rotate, and the contact point position of the restraint arm 4 and the pawl arm 3 is changed, so that the pawl 1 is engaged with or disengaged from the ratchet 2.
In this embodiment, when the initial position of the contact point between the pawl arm 3 and the constraint arm 4 is on the first curved surface 31 and is far from the critical constraint point, the pawl 1 is engaged with the ratchet 2; the constraint arm 4 pushes the pawl arm 3 to rotate, and when the contact point of the pawl arm 3 and the constraint arm 4 is in the first curved surface 31 and gradually approaches a critical constraint point, the pawl 1 and the ratchet 2 are gradually separated; when the limit contact point of the pawl arm 3 and the constraint arm 4 is the second curved surface 32, the pawl 1 is separated from the ratchet wheel 2.
In this embodiment, the curvature of the second curved surface 32 gradually decreases from the critical constraining point to the other end, so that the distance of disengagement of the pawl 1 from the ratchet 2 does not increase when the contact point of the pawl arm 3 and the constraining arm 4 is at the second curved surface 32. Preferably, the second curved surface 32 is an arc surface with a center of circle from the rotation center of the constraint arm 4, so as to ensure that when the limit contact point of the constraint arm 4 and the pawl arm 3 is located on the second curved surface 32, the position of the pawl arm 3 remains unchanged, the distance between the pawl 1 and the ratchet 2 is not increased, and further, the occurrence of the mutual interference between the pawl 1 and the driving motor stator is avoided.
The contact surface between the critical constraint point and the rotary hinge joint of the pawl arm 3 is set to be an outward bent curved surface with gradually reduced curvature, so that when the constraint arm 4 moves to the contact point which is positioned on the second curved surface, the constraint arm 4 cannot push the pawl arm 3 to generate displacement, and the occurrence of interference between the pawl 1 and a driving motor stator caused by the increase of the relative distance between the pawl 1 and the ratchet 2 and the overlarge stroke of the pawl 1 is avoided.
In this embodiment, the middle of the pawl arm 3 is rotatably connected with the reducer housing 9 through a vertically arranged rotating shaft, the first end of the pawl arm 3 is provided with the pawl 1 correspondingly engaged with the ratchet 2, and one side of the second end forms a contact surface contacted with the restraint arm 4; the pawl arm 3 part between first end and the rotation axis is the "V" shape structure of buckling to ratchet 2 peripheral direction for restraint arm 4 when removing to a certain position, restraint arm 4 and pawl arm 3 "V" shape structure spacing contact mutually, avoid restraint arm 4 to continue the motion, lead to the emergence of the two condition of breaking away from each other, and then reach the action of restriction arm 4, prevent that the too big condition of displacement from taking place.
Example two
In this embodiment, in order to prevent the pawl 1 from moving away from the ratchet 2 after being disengaged, the following arrangement may be adopted: one end of the pawl arm 3 is in contact with one side surface of the restraint arm 4, and the corresponding side surface of the restraint arm 4 forms a contact surface; the contact surface of the constraint arm 4 comprises a first curved surface and a second curved surface which are connected, the first curved surface and the second curved surface are both bent towards the direction far away from the pawl arm 3, and the joint of the first curved surface and the second curved surface is a critical constraint point (not noted in the attached drawings) closest to the pawl arm 3.
Through the arrangement, when the constraint arm 4 acts, the pawl arm 3 is pushed to generate relative rotational displacement, and the purpose of controlling the pawl 1 and the ratchet wheel 2 to be meshed or separated with each other is further realized; meanwhile, the contact surfaces of the constraint arms 4 are set to be different curved surfaces, so that the contact points of the pawl arms 3 and the constraint arms 4 respectively push the pawl arms 3 to move or keep the pawl arms 3 static when the contact points are on the first curved surface or the second curved surface, so that the pawl arms 3 generate different action conditions when the different curved surfaces are in contact with the constraint arms 4, and the phenomenon that the pawl 1 is interfered with a washing machine driving motor stator due to the fact that the separation distance of the pawl 1 is too large is avoided.
EXAMPLE III
The present embodiment differs from the first and second embodiments described above in that: as shown in fig. 6, the reducer of the washing machine comprises a ratchet 2, a pawl 1 matched with the ratchet; the pawl 1 is connected with a pawl arm 3 extending towards the periphery of the ratchet 2, the pawl arm 3 is directly driven with a speed reducing arm 5, one side surface of the pawl arm 3 is contacted with one end of the speed reducing arm 5, and the speed reducing arm 5 pushes the pawl arm 3 to move so that the pawl 1 is separated from the ratchet 2; the corresponding side surface of the pawl arm 3 is a contact surface contacted with the pawl arm 3; the contact surface is a curved surface which is bent from the critical constraint point in the middle part to two sides with different curvatures respectively.
The contact surface of the pawl arm 3 and the deceleration arm 5 is set to be curved surfaces which are respectively bent from the middle critical constraint point to two sides with different curvatures, so that the deceleration arm 5 can respectively push the pawl arm 3 to move or not push the pawl arm 3 and keep still at the two side curved surfaces of the critical constraint point, the relative position is kept unchanged when the pawl arm 3 and the ratchet wheel 2 are pushed to be separated to a certain distance, and the purpose of avoiding the mutual interference between the pawl arm 3 and the driving motor stator can be achieved.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The washing machine speed reducer comprises a ratchet wheel, a pawl matched with the ratchet wheel and a speed reducing arm for driving the pawl to disengage; the method is characterized in that: the pawl is connected with a pawl arm extending towards the periphery of the ratchet wheel, the pawl arm is in transmission connection with a speed reduction arm through a restraint arm, one end of the restraint arm is in contact with one side face of the pawl arm, the speed reduction arm pushes the restraint arm to rotate, and the restraint arm drives the pawl arm to move so that the pawl is separated from the ratchet wheel; the contact surface of the pawl arm and the constraint arm is a curved surface which is bent from the middle critical constraint point to two sides with different curvatures respectively.
2. The decelerator of a washing machine according to claim 1, wherein the pawl arm, the restraint arm and the deceleration arm are respectively mounted to the decelerator housing via respective rotation shafts arranged in parallel such that the pawl arm, the restraint arm and the deceleration arm are rotatable relative to the decelerator housing.
3. The reducer of washing machine according to claim 2, characterized in that the hinges of the ratchet arm and/or the restraint arm and/or the reduction arm and the reducer casing are respectively provided with a reset torsion spring for resetting, and the reset torsion springs provide reset driving force for the ratchet arm, the restraint arm and the reduction arm to ensure that the ratchet arm and the restraint arm, and the restraint arm and the reduction arm are always in contact; the reset acting force provided by each reset torsion spring directly or indirectly drives the pawl to be meshed with the ratchet wheel.
4. The reducer of any one of claims 1 to 3, wherein one side of the pawl arm is in contact with one end of the constraint arm, the contact surface between the pawl arm and the constraint arm comprises a first curved surface and a second curved surface which are connected, and the first curved surface and the second curved surface are both bent in a direction away from the constraint arm, so that the connection point of the first curved surface and the second curved surface is the critical constraint point closest to the constraint arm.
5. A decelerator for a washing machine according to claim 4 wherein the intermediate portion of the pawl arm is pivotally connected to the decelerator housing such that the restraint arm urges the pawl arm to rotate to change the position of the point of contact between the restraint arm and the pawl arm to engage or disengage the pawl with the ratchet wheel.
6. The reducer of claim 5, wherein the pawl engages the ratchet wheel when the initial contact point between the pawl arm and the constraint arm is at the first curved surface and away from the critical constraint point; the constraint arm pushes the pawl arm to rotate, and when a contact point of the pawl arm and the constraint arm is in the first curved surface and gradually approaches a critical constraint point, the pawl and the ratchet wheel are gradually separated; when the limiting contact point of the pawl arm and the constraint arm is a second curved surface, the pawl is disengaged from the ratchet wheel.
7. A decelerator for a washing machine as claimed in claim 6, wherein the curvature of the second curved surface decreases progressively from the critical restraint point towards the other end, such that the distance of disengagement of the pawl from the ratchet wheel does not increase when the point of contact of the pawl arm with the restraint arm is at the second curved surface;
or the second curved surface is an arc line at one end of which the constraint point rotating shaft is circular, so that when the contact point of the pawl arm and the constraint arm is positioned on the second curved surface, the disengagement distance between the pawl and the ratchet wheel cannot be changed.
8. The reducer of any one of claims 1 to 3, wherein the middle part of the pawl arm is rotatably connected to the reducer housing via a vertically arranged rotating shaft, the pawl engaged with the ratchet wheel is mounted at a first end of the pawl arm, and a contact surface contacting the restraint arm is formed at one side of a second end of the pawl arm; the pawl arm between the first end and the rotating shaft is bent towards the outer periphery of the ratchet wheel to limit the action of the restraint arm and prevent the over-displacement.
9. The washing machine speed reducer comprises a ratchet wheel, a pawl matched with the ratchet wheel and a speed reducing arm for driving the pawl to disengage; the method is characterized in that: the pawl is connected with a pawl arm extending towards the periphery of the ratchet wheel, the pawl arm is directly in transmission connection with the speed reduction arm, one side of the pawl arm is in contact with one end of the speed reduction arm, and the speed reduction arm pushes the pawl arm to move so that the pawl is separated from the ratchet wheel; one end of the speed reducing arm is in contact with one side surface of the pawl arm, and the contact surface of the pawl arm and the speed reducing arm is a curved surface which is bent from a middle critical constraint point to two sides with different curvatures respectively.
10. A washing machine characterized by: the washing machine is provided with the washing machine speed reducer of any one of claims 1 to 9, a speed reducing arm of the washing machine speed reducer is in traction connection with an electric integral valve, and the electric integral valve drives the speed reducing arm, the speed reducing arm to push a restraint arm and a restraint arm to push a pawl arm to move so that a pawl is disengaged or engaged with a ratchet wheel; the ratchet wheel is meshed with the output shaft of the driving motor of the washing machine, so that the rotating speed of the output shaft of the driving motor is reduced until braking is achieved when the pawl is meshed with the ratchet wheel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710254267.7A CN106968083B (en) | 2017-04-18 | 2017-04-18 | Washing machine speed reducer and washing machine |
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| CN201710254267.7A CN106968083B (en) | 2017-04-18 | 2017-04-18 | Washing machine speed reducer and washing machine |
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| CN106968083B true CN106968083B (en) | 2021-05-04 |
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| CN111118827B (en) * | 2018-10-31 | 2022-10-28 | 无锡小天鹅电器有限公司 | Brake for drum washing machine and drum washing machine |
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| JPS639491A (en) * | 1986-07-01 | 1988-01-16 | 松下電器産業株式会社 | Brake apparatus of washing machine |
| JPH1170294A (en) * | 1997-08-29 | 1999-03-16 | Sanyo Electric Co Ltd | Fully automated washing machine |
| WO2009055422A2 (en) * | 2007-10-22 | 2009-04-30 | Gkn Sinter Metals, Llc. | Reduced stress pawl and ratchet tooth for a one-way clutch |
| CN201411567Y (en) * | 2009-03-31 | 2010-02-24 | 肇庆华尔车辆检测设备有限公司 | Speed-reduction clutch bearing fixing mechanism of washing machine |
| CN104832562B (en) * | 2010-03-15 | 2017-11-10 | Ntn株式会社 | Clutch unit |
| CN105393442A (en) * | 2013-07-19 | 2016-03-09 | 阿莫泰克有限公司 | Washing machine motor and washing machine comprising same |
| CN203431057U (en) * | 2013-08-18 | 2014-02-12 | 衢州兰玲机电科技有限公司 | Clutch, provided with fixed top parts, of energy-saving competitive race car |
| WO2015050397A1 (en) * | 2013-10-02 | 2015-04-09 | 주식회사 아모텍 | Washing machine motor and washing machine comprising same |
| CN104329395B (en) * | 2014-09-15 | 2017-05-10 | 惠安盛泽建材有限公司 | Bidirectional transmission mechanism |
| CN204825394U (en) * | 2015-08-05 | 2015-12-02 | 浙江三星机电股份有限公司 | Washing machine speed reduction clutch's novel brake arm positioner |
| CN205676677U (en) * | 2016-05-19 | 2016-11-09 | 安徽聚隆传动科技股份有限公司 | The double ratchet speed-reducing clutch of a kind of double ratchet wheels |
| CN205669123U (en) * | 2016-05-19 | 2016-11-02 | 安徽聚隆传动科技股份有限公司 | A kind of ratchet and pawl arrangement of speed-reducing clutch |
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Effective date of registration: 20210412 Address after: 266101 Haier Road, Laoshan District, Qingdao, Qingdao, Shandong Province, No. 1 Applicant after: QINGDAO JIAONAN HAIER WASHING MACHINE Co.,Ltd. Applicant after: Haier Zhijia Co.,Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER WASHING MACHINE Co.,Ltd. |
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