A positioning motor

Abstract

The present invention relates to a positioning motor, comprising a shell, in which a motor, a one-way check mechanism, a speed reduction mechanism and an output mechanism are arranged in sequence; the one-way check mechanism is meshed with the output gear of the motor so that the output gear can only rotate in one direction; the input end of the speed reduction mechanism is meshed with the output gear of the motor, and the output end of the speed reduction mechanism is on a centrifugal rod rotating along the axis; the beneficial effects of the present invention are: 1. During the switching process of the product in different states, the motor consumes action and energy, and the motor is automatically powered off after the switching is completed, and the product is kept in the corresponding position through the self-positioning torque of the motor, while saving energy.

Description

Technical Field

[0001] The invention relates to a positioning motor. Background Art

[0002] Motor components have been widely used in many fields such as industry, smart home appliances, and office automation. For example, motor components can be used in the driving system of a washing machine to control the clutch in various working states, realize the change of the power output of the washing machine, and thus achieve different washing states.

[0003] The quality of the control system of the washing machine clutch is very important to the quality of the washing machine. The quality reliability of the positioning motor in the control system determines the reliability of the washing machine operation.

[0004] The traditional washing machine clutch control controls the clutch action through the drain motor (also known as the traction device). The product structure is complex, with many parts and many mechanical rotation control points, which can cause the drain motor to fail. The specific manifestations are as follows: The existing technology drain motor controls the clutch when it is powered on, and quickly returns to the origin when the power is off. When an abnormal power failure occurs during the use of the washing machine, the drain motor quickly returns to the origin, causing the clutch state to change instantly. In extreme cases, the clutch will be damaged, resulting in product failure;

[0005] On the other hand, in the prior art, when the drainage motor controls the clutch to maintain a certain state, the motor needs to be powered on all the time, which causes wear and tear of the internal parts over a long period of time, shortens the product life, and wastes energy while powering on for a long period of time. Summary of the invention

[0006] In order to overcome the disadvantage that the existing positioning motor is easy to damage the washing tub components under the condition of improper clutch, the present invention provides a positioning motor with stable clutch positioning.

[0007] The technical solution of the present invention to solve the technical problem is: a positioning motor, comprising a housing, wherein a motor, a one-way check mechanism, a speed reduction mechanism, and an output mechanism are sequentially arranged in the housing;

[0008] The one-way check mechanism is engaged with the output gear of the motor so that the output gear can only rotate in one direction;

[0009] The input end of the speed reduction mechanism is meshed with the output gear of the motor, and the output end of the speed reduction mechanism is a centrifugal rod rotating along the axis;

[0010] The output mechanism includes an output frame that is movable and arranged on the housing, a shift fork control end is arranged on the output frame, the two sides of the output frame are limited so that the output frame can only slide up and down, a conversion groove is arranged on the output frame, and the end of the centrifugal rod is arranged in the conversion groove, so as to drive the output frame to move up and down. The output frame is limited by the two side walls of the housing and can only move up and down, and the circular motion of the centrifugal rod will be converted into the up and down reciprocating motion of the output frame in the conversion groove.

[0011] A structural optimization of a shift fork control end, the shift fork control end is a slider, the output frame is provided with a slider groove, the slider is slidably arranged in the slider groove, a spring is provided in the slider groove, one end of the spring is connected to the bottom of the slider groove, and one end of the spring is connected to the slider.

[0012] The buffer structure is set to effectively prevent the positioning motor from being damaged when the clutch is stuck due to abnormal reasons. Specifically, there is a slider and a spring in the slider. The initial elastic force F0 of the spring and the elastic force F1 after compression are specifically expressed as F0>F2, F1<F3, where F2 is the maximum load of the clutch and F3 is the stall force of the positioning motor.

[0013] Further optimization is provided on both side walls of the slider groove, and both sides of the slider are slidably arranged in the slider rail grooves.

[0014] An optimization of an installation structure, the shell includes a box body and a box cover, a back plate is provided behind the box body, a window is provided on the back plate, the output frame of the output mechanism is slidably arranged between the back plate and the box body, and the fork control end is exposed on the window.

[0015] To facilitate the output frame to slide up and down, the output frame of the output mechanism is also provided with rotating bodies on both sides to facilitate the output frame to slide up and down. The rotating bodies are provided with multiple, at least two, balls or rollers on each side to facilitate the flexible and symmetrical output frame to move up and down.

[0016] An optimization of a one-way check mechanism, the one-way check mechanism is a ratchet pawl mechanism, a ratchet is fixedly connected to the output gear of the motor, a pawl driving member is meshed on the output gear of the motor, the pawl of the pawl driving member is against the ratchet so that the ratchet can only rotate in one direction.

[0017] A preferred deceleration mechanism, the deceleration mechanism comprises several stages of deceleration gear sets, at least one of which is a planetary gear set. The preferred second stage deceleration gear uses a planetary gear to effectively reduce the number of gear transmission stages. The preferred total deceleration ratio of the rotating mechanism is between 150 and 250. The preferred gear reduction ratios of each stage are 2.9 for the first stage, 5 for the second stage, 3.6 for the third stage, and 4.2 for the fourth stage.

[0018] An optimization of a motor, wherein an electric control mechanism is coaxially provided on the output end of the speed reduction mechanism, the electric control mechanism comprises a first cam and a second cam coaxially arranged, a first contact piece group and a second contact piece group are provided beside the first cam, a third contact piece group is provided on the second cam, a first high side and a second high side are provided on the first cam, a first valley side and a second valley side are provided on the cam between the first high side and the second high side, and the second valley side is longer than the first valley side;

[0019] The second cam is provided with a descending concave valley, the valley of the descending concave valley is the third valley edge, and the area outside the descending concave valley on the second cam is the third high edge;

[0020] A first falling edge is provided between the first high side and the first valley side, a first rising edge is provided between the first valley side and the second high side, a second falling edge is provided between the second high side and the second valley side, and a second rising edge is provided between the second valley side and the first high side;

[0021] The third valley side is provided with a third falling edge on the same side as the first falling edge, and the other end of the third valley side is provided with a third rising edge.

[0022] The first contact block of the first contact sheet group and the second contact block of the second contact sheet group are pressed against the first cam; when the first contact block presses against the first high side and the second high side, the first contact sheet group contacts and triggers the S1 electrical path;

[0023] When the second contact block is pressed against the first high side and the second high side, the second contact piece group contacts and electrically triggers the S2 path;

[0024] When the third contact block is pressed against a place other than the third valley edge, the third contact piece group contacts and triggers the S3 electrical path;

[0025] When the first contact block is located at the second falling edge, the second contact block is located at the first high side; when the third contact block is located at the third falling edge, the first contact block is located at the second high side.

[0026] Further optimization, the first contact block, the second contact block, and the third contact block are all right-angled triangle blocks with a right-angled side parallel to the direction of the contact piece, the first cam and the second cam rotate clockwise, and the hypotenuse of the right-angled triangle block is set on the counterclockwise side of the right-angled triangle.

[0027] Further optimization, the angles of the first falling edge, the second falling edge, and the third falling edge are negative angle inclinations. The negative angle inclination can be selected to be about 10 degrees, which can accurately and quickly switch the positioning motor from the power-on state to the power-off state.

[0028] When the present invention is in use, the motor is transmitted to the output mechanism through the speed reduction mechanism, and the output frame of the output mechanism is driven by the centrifugal rod to perform the expression of high-position separation clutch and low-position closing clutch.

[0029] At the same time, the end contacts of the first contact S1, the second contact S2, and the third contact S3 are all connected to the live wire pole of the motor, the head end of the S1 switch is connected to the first live wire terminal L1, the head end of the S2 switch is connected to the first live wire terminal L2, and the head end of the S3 switch is connected to the first live wire terminal L3. L1, L2, and L3 are respectively controlled by the washing machine control circuit. The connection order of L1, L2, and L3 is L1, L2, and then L3 returns to its position.

[0030] When L1 and L2 are energized, the entire first cam will stop at the angle where the second contact block sinks into the second valley edge. In this position, the centrifugal shaft connected to the cam just makes the slider toggle member in the highest position, realizing the clutch fork toggle and realize clutch disengagement.

[0031] Then L3 starts, and the entire cam structure drives the centrifugal shaft to rotate and return to its original position. When the third contact block falls into the downward valley, the centrifugal shaft of the slider is at the lowest position to realize the return of the shift fork, and the clutch is closed again.

[0032] The beneficial effects of the present invention are as follows: 1. The motor consumes energy during the switching process between different states of the product. After the switching is completed, the motor automatically cuts off the power, and the product is kept in the corresponding position through the self-positioning torque of the motor, while saving energy. 2. The double insurance positioning of the position of the positioning motor is controlled by a combination of mechanical and electronic electric control cam contacts, which effectively prevents the positioning motor from being damaged when the clutch is stuck due to abnormal reasons. 3. The output frame with a slider spring set on it is used to realize the connection with the shift fork. This buffer structure prevents the positioning motor from being damaged when the clutch is stuck due to abnormal reasons. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic diagram of an embodiment of the present invention.

[0034] Figure 2 Schematic diagram of an explosion of one embodiment of the present invention.

[0035] Figure 3 It is a schematic diagram of a motor, a reduction mechanism, an output mechanism, and an electronic control mechanism according to an embodiment of the present invention.

[0036] Figure 4 Schematic diagram of an output mechanism according to an embodiment of the present invention.

[0037] Figure 5 It is a schematic diagram of an electric control mechanism according to an embodiment of the present invention.

[0038] Figure 6 It is a schematic diagram of electrical communication of an electric control mechanism according to an embodiment of the present invention.

[0039] Figure 7 It is a schematic diagram of the first cam of the electric control mechanism according to an embodiment of the present invention.

[0040] Figure 8 It is a schematic diagram of the second cam of the electric control mechanism according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below with reference to the accompanying drawings.

[0042] Example 1

[0043] Combined with Figures 1 to 8 , a positioning motor 2, comprising a housing 1, wherein the housing 1 is provided with a motor 2, a one-way check mechanism 3, a speed reduction mechanism 4, and an output mechanism 6 in sequence;

[0044] The one-way check mechanism 3 is engaged with the output gear of the motor 2 so that the output gear can only rotate in one direction;

[0045] The input end of the speed reduction mechanism 4 is meshed with the output gear of the motor 2, and the output end of the speed reduction mechanism 4 is a centrifugal rod 5 rotating along the axis;

[0046] The output mechanism 6 includes an output frame 7 that is movable and arranged on the housing 1. A fork control end is arranged on the output frame 7. The output frame 7 is limited on both sides and can only slide up and down. A conversion groove 8 is arranged on the output frame 7. The end of the centrifugal rod is arranged in the conversion groove 8, thereby driving the output frame 7 to move up and down. The output frame 7 is limited by the two side walls of the housing 1 and can only move up and down. The circular motion of the centrifugal rod will be converted into the up and down reciprocating motion of the output frame 7 in the conversion groove 8.

[0047] A structural optimization of a fork control end, wherein the fork control end is a slider 9, a slider groove 10 is provided on the output frame 7, the slider 9 is slidably arranged in the slider groove 10, a spring 11 is provided in the slider groove 10, one end of the spring 11 is connected to the bottom of the slider groove 10, and one end of the spring 11 is connected to the slider 9.

[0048] The buffer structure is provided to effectively prevent the positioning motor 2 from being damaged when the clutch is stuck due to abnormal reasons. Specifically, a slider 9 and a spring 11 are arranged in the slider 9; the initial elastic force F0 of the spring 11 and the elastic force F1 after compression are specifically expressed as F0>F2, F1<F3, wherein F2 is the maximum load of the clutch, and F3 is the stall force of the positioning motor 2;

[0049] Further optimized, slider rail grooves 12 are provided on both side walls of the slider groove 10 , and both sides of the slider 9 are slidably arranged in the slider rail grooves 12 .

[0050] An optimization of the installation structure, the shell 1 includes a box body 13 and a box cover 14, a back plate 15 is further provided behind the box body 13, a window 16 is provided on the back plate 15, the output frame 7 of the output mechanism 6 is slidably disposed between the back plate 15 and the box body 13, and the fork control end is exposed on the window 16.

[0051] To facilitate the output frame 7 to slide up and down, the output frame 7 of the output mechanism 6 is also provided with rotating bodies 17 on both sides to facilitate the output frame 7 to slide up and down. The rotating bodies 17 are provided with multiple, at least two, balls or rollers on each side to facilitate the flexible and symmetrical up and down movement of the output frame 7.

[0052] An optimization of a one-way check mechanism 3, the one-way check mechanism 3 is a ratchet pawl 18 mechanism, a ratchet is fixedly connected to the output gear of the motor 2, a pawl driving member is meshed on the output gear of the motor 2, the pawl 18 of the pawl driving member rests on the ratchet so that the ratchet can only rotate in one direction.

[0053] A preferred deceleration mechanism, the deceleration mechanism 4 includes several stages of deceleration gear sets, at least one of which is a planetary gear set. The preferred second stage deceleration gear uses a planetary gear to effectively reduce the number of gear transmission stages. The preferred total deceleration ratio of the rotating mechanism is between 150-250, and the preferred gear reduction ratios of each stage are 2.9 for the first stage, 5 for the second stage, 3.6 for the third stage, and 4.2 for the fourth stage.

[0054] An optimization of a motor 2, wherein an electric control mechanism 19 is coaxially provided on the output end of the speed reduction mechanism 4, the electric control mechanism 19 comprises a first cam 20 and a second cam 21 which are coaxially arranged, a first contact piece group 22 and a second contact piece group 23 are provided beside the first cam 20, a third contact piece group 24 is provided on the second cam 21, a first high side 25 and a second high side 26 are provided on the first cam 20, a first valley side 27 and a second valley side 28 are provided on the cam between the first high side 25 and the second high side 26, and the second valley side 28 is longer than the first valley side 27;

[0055] A descending valley 29 is provided on the second cam 21, the valley of the descending valley 29 is a third valley edge 30, and the area outside the descending valley 29 on the second cam 21 is a third high edge 31;

[0056] A first falling edge 32 is provided between the first high side 25 and the first valley side 27, a first rising edge is provided between the first valley side 27 and the second high side 26, a second falling edge 33 is provided between the second high side 26 and the second valley side 28, and a second rising edge is provided between the second valley side 28 and the first high side 25;

[0057] The third valley edge 30 is provided with a third falling edge 34 on the same side as the first falling edge 32, and the other end of the third valley edge 30 is provided with a third rising edge.

[0058] The first contact block 35 of the first contact sheet group 22 and the second contact block 36 of the second contact sheet group 23 are pressed against the first cam 20; when the first contact block 35 presses against the first high side 25 and the second high side 26, the first contact sheet group 22 contacts and triggers the S1 electrical path;

[0059] When the second contact block 36 presses against the first high side 25 and the second high side 26, the second contact piece group 23 contacts and electrically triggers the S2 path;

[0060] When the third contact block 37 is pressed against a place outside the third valley edge 30, the third contact piece group 24 contacts and triggers the S3 electrical path;

[0061] When the first contact block 35 is located at the second falling edge 33 , the second contact block 36 is on the first high side 25 ; when the third contact block 37 is located at the third falling edge 34 , the first contact block is located on the second high side 26 .

[0062] Further optimized, the first contact block 35, the second contact block 36, and the third contact block 37 are all right-angled triangle blocks with a right-angled side parallel to the direction of the contact piece, the first cam 20 and the second cam 21 rotate clockwise, and the hypotenuse of the right-angled triangle block is set on the counterclockwise side of the right-angled triangle.

[0063] Further optimization, the angles α of the first falling edge 32, the second falling edge 33, and the third falling edge 34 are negative angles. The negative angle can be selected to be about 10 degrees, which can accurately and quickly switch the positioning motor 2 from the power-on state to the power-off state.

[0064] When the present invention is in use, the motor 2 is transmitted to the output mechanism 6 through the speed reduction mechanism 4, and the output frame 7 of the output mechanism 6 is driven by the centrifugal rod to perform the expression of high-position separation clutch and low-position closing clutch.

[0065] At the same time, the end contacts of the first contact S1, the second contact S2, and the third contact S3 are all connected to the live wire pole of the motor 2, the head end of the S1 switch is connected to the first live wire terminal L1, the head end of the S2 switch is connected to the first live wire terminal L2, and the head end of the S3 switch is connected to the first live wire terminal L3. L1, L2, and L3 are respectively controlled by the washing machine control circuit. The connection order of L1, L2, and L3 is L1, L2, and then L3 returns to its position.

[0066] When L1 and L2 are energized, the entire first cam 20 will stop at the angle position where the second contact block 36 sinks into the second valley edge 28. In this position, the centrifugal shaft connected to the cam just makes the slider 9 toggle member in the highest position, realizing the clutch fork toggle to achieve clutch disengagement.

[0067] Then L3 starts, and the entire cam structure drives the centrifugal shaft to rotate and return to its original position. When the third contact block 37 falls into the downward valley 29, the centrifugal shaft of the slider 9 is at the lowest position to realize the return of the shift fork, and the clutch is closed again.

[0068] The beneficial effects of the present invention are as follows: 1. The motor consumes energy during the switching process between different states of the product. After the switching is completed, the motor automatically cuts off the power, and the product is kept in the corresponding position through the self-positioning torque of the motor, while saving energy. 2. The double insurance positioning of the position of the positioning motor is controlled by a combination of mechanical and electronic electric control cam contacts, which effectively prevents the positioning motor from being damaged when the clutch is stuck due to abnormal reasons. 3. The output frame 7 with a slider spring is used to achieve the connection with the shift fork. This buffer structure prevents the positioning motor from being damaged when the clutch is stuck due to abnormal reasons.

Claims

1. A positioning motor, characterized in that: It comprises a housing, in which a motor, a one-way check mechanism, a speed reduction mechanism and an output mechanism are arranged in sequence; The one-way check mechanism is engaged with the output gear of the motor so that the output gear can only rotate in one direction; The input end of the speed reduction mechanism is meshed with the output gear of the motor, and the output end of the speed reduction mechanism is a centrifugal rod rotating along the axis; The output mechanism includes an output frame that is movable and arranged on the shell, a shift fork control end is provided on the output frame, and the output frame can only slide up and down due to the limit on both sides, and a conversion groove is provided on the output frame, and the end of the centrifugal rod is arranged in the conversion groove, so as to drive the output frame to move up and down; the shift fork control end is a slider, and a slider groove is provided on the output frame, and the slider is slidably arranged in the slider groove, and a spring is provided in the slider groove, one end of the spring is connected to the bottom of the slider groove, and the other end of the spring is connected to the slider.

2. The positioning motor according to claim 1, characterized in that: Slider rail grooves are arranged on both side walls of the slider groove, and both sides of the slider are slidably arranged in the slider rail grooves.

3. The positioning motor according to claim 1, characterized in that: The shell comprises a box body and a box cover. A back plate is arranged behind the box body. A window is arranged on the back plate. The output frame of the output mechanism is slidably arranged between the back plate and the box body, and the shift fork control end is exposed on the window.

4. The positioning motor according to claim 3, characterized in that: Rotating bodies are also provided on both sides of the output frame of the output mechanism to facilitate the output frame to slide up and down.

5. The positioning motor according to claim 1, characterized in that: The one-way check mechanism is a ratchet and pawl mechanism.

6. The positioning motor according to claim 1, characterized in that: The speed reduction mechanism comprises a plurality of reduction gear sets, at least one of which is a planetary gear set.

7. The positioning motor according to any one of claims 1 to 6, characterized in that: An electric control mechanism is coaxially provided on the output end of the speed reduction mechanism, and the electric control mechanism includes a first cam and a second cam coaxially arranged, a first contact piece group and a second contact piece group are arranged beside the first cam, a third contact piece group is arranged on the second cam, a first high side and a second high side are arranged on the first cam, a first valley side and a second valley side are arranged on the cam between the first high side and the second high side, and the second valley side is longer than the first valley side; The second cam is provided with a descending concave valley, the valley of the descending concave valley is the third valley edge, and the area outside the descending concave valley on the second cam is the third high edge; A first falling edge is provided between the first high side and the first valley side, a first rising edge is provided between the first valley side and the second high side, a second falling edge is provided between the second high side and the second valley side, and a second rising edge is provided between the second valley side and the first high side; The third valley side is provided with a third falling edge on the same side as the first falling edge, and the other end of the third valley side is provided with a third rising edge. The first contact block of the first contact sheet group and the second contact block of the second contact sheet group are pressed against the first cam; when the first contact block presses against the first high side and the second high side, the first contact sheet group contacts and triggers the electrical path; When the second contact block is pressed against the first high side and the second high side, the second contact piece group contacts the electrical triggering path; When the third contact block is pressed against a place other than the third valley edge, the third contact piece group contacts and triggers the electrical path; When the first contact block is located at the second falling edge, the second contact block is located at the first high side; when the third contact block is located at the third falling edge, the first contact block is located at the second high side.

8. The positioning motor according to claim 7, characterized in that: The first contact block, the second contact block and the third contact block are all right-angled triangle blocks with a right-angled side parallel to the direction of the contact piece. The first cam and the second cam rotate clockwise, and the hypotenuse of the right-angled triangle block is set on the counterclockwise side of the right-angled triangle.

9. The positioning motor according to claim 7, characterized in that: The angles of the first falling edge, the second falling edge and the third falling edge are negative inwardly inclined.

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