CN218267038U - Planetary gear clutch, door opening and closing system and household appliance - Google Patents

Abstract

The utility model relates to the technical field of automatic door opening and closing, in particular to a planetary gear clutch, a door opening and closing system and a household appliance, wherein, a planetary support and a sun gear are both rotatably arranged on a base, and the sun gear is in transmission connection with a power part; the planetary wheel set is in transmission connection with the sun wheel; the power part drives the sun gear to rotate forwards or backwards to drive the planet support to rotate between a first position and a second position, and when the planet support is located at the first position and the second position, the planet wheel set can be meshed with the driven gear and drive the driven gear to rotate forwards or backwards; when the planet carrier is located at the middle position of the first position and the second position, the planet wheel set is separated from the driven gear. When the refrigerator door is opened and closed manually, resistance generated by a planetary gear clutch or a power part does not need to be overcome, and the opening and closing of the refrigerator door are more labor-saving.

Description

Planetary gear clutch, door opening and closing system and household appliance

Technical Field

The utility model relates to an automatic switch door technical field especially relates to a planetary gear clutch, switching door system and domestic appliance.

Background

With the improvement of the living standard of people, the refrigerator becomes one of important household appliances which are indispensable in daily life. The conventional refrigerator is not provided with an automatic door opening and closing device, and generally needs manual opening. However, in some cases, for example, both hands are occupied by articles, or the user of the refrigerator is influenced by his own factors, the refrigerator door is difficult to open or close, which affects the user experience. In order to realize the automatic door opening and closing action of the refrigerator, in the prior art, a rotating mechanism is usually arranged at the top of the refrigerator to drive the refrigerator door to rotate relative to a refrigerator main body, so that the refrigerator door can be automatically opened or closed.

General rotary mechanism includes power spare, follows driving wheel and connecting rod, and power spare is connected with following the driving of driving wheel transmission, and eccentric position department from the driving wheel is located to connecting rod one end, and on the refrigerator door was located to the other end, through the cooperation of above-mentioned structure, turned into the circular motion of refrigerator door with the circular motion of power spare.

But because be in connected state between rotary mechanism and the refrigerator door all the time in the above-mentioned device use, when the manual switch door, still need overcome the resistance that rotary mechanism produced for it is hard when the refrigerator door-trip, easily produces relatively poor user experience.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a planetary gear clutch, switch door system and domestic appliance to when solving artifical switch refrigerator door among the prior art, need overcome the resistance that rotary mechanism produced, lead to the switch door hard and experience poor problem.

In order to achieve the purpose, the utility model adopts the following technical proposal:

on one hand, the utility model provides a planetary gear clutch, which is used for intermittently connecting a power part and a driven gear; the planetary gear clutch includes:

a base;

the planet carrier is rotatably arranged on the base;

the sun wheel is rotatably arranged on the base and is in transmission connection with the power part;

the planetary wheel set is rotatably arranged on the planetary support and is in transmission connection with the sun wheel;

the power part drives the sun gear to rotate around a first direction or a second direction to drive the planet support to rotate between a first position and a second position, and when the planet support is located at the first position, the planet wheel set is meshed with the driven gear and can drive the driven gear to rotate around the first direction; when the planet support is located at the second position, the planet wheel set is meshed with the driven gear and drives the driven gear to rotate around a second direction; the planetary gear set is disengaged from the driven gear when the planet carrier is in a third position intermediate the first position and the second position.

Preferably, the planetary wheel set comprises a first planetary wheel and a second planetary wheel, which are both rotatably arranged on the planetary carrier and are both in transmission connection with the sun wheel; when the planet support is located at the first position or the second position, one of the first planet wheel and the second planet wheel is meshed with the driven gear and drives the driven gear to rotate around the first direction or the second direction; when the planet carrier is located at the third position, the first planet wheel and the second planet wheel are both separated from the driven gear.

Preferably, the first planet wheel is provided with a first friction part, the base is provided with a first boss, and the first friction part is abutted to the first boss; and/or

The second planet wheel is provided with a second friction part, the base is provided with a second boss, and the second friction part is abutted to the second boss.

Preferably, the planetary gear set includes a third planetary gear rotatably disposed on the planetary carrier and in transmission connection with the sun gear, the planetary gear clutch further includes a first intermediate gear and a second intermediate gear rotatably disposed on the base and both engaged with the driven gear, and when the planetary carrier is located at the first position or the second position, the third planetary gear can be engaged with the first intermediate gear or the second intermediate gear and drive the driven gear to rotate around the second direction or the first direction; and when the planet carrier is located at the third position, the third planet wheel is separated from the first intermediate gear and the second intermediate gear.

Preferably, the planetary gear clutch further comprises a first stop assembly and/or a second stop assembly, and when the planet carrier rotates from the second position to the first position, the first stop assembly prevents the planet carrier from further rotating; when the planet carrier rotates from the first position to the second position, the second stop assembly prevents the planet carrier from rotating continuously.

Preferably, the first stopping assembly comprises a first limiting part arranged on the planet carrier and a first stopping part arranged on the base, and when the planet carrier rotates to the first position, the first limiting part abuts against the first stopping part; and/or

The second stopping component comprises a second limiting part and a second stopping part, the second limiting part is arranged on the planet carrier, the second stopping part is arranged on the base, and when the planet carrier rotates to the second position, the second limiting part is abutted to the second stopping part.

Preferably, the planetary gear clutch further comprises a position detection assembly for detecting the position of the planet carrier.

Preferably, the position detecting assembly includes a detecting rod disposed on the planet carrier and a detecting member disposed on the base, and the detecting rod can be detected by the detecting member when the planet carrier is located in at least one of the first position, the second position or the third position.

In a second aspect, the present invention further provides a door opening and closing system, which comprises a power member, a driven gear and any one of the above technical solutions, wherein the driven gear is used for opening or closing the door, and the planetary gear clutch is used for intermittently connecting the power member and the driven gear.

The third aspect, the utility model also provides a domestic appliance, this domestic appliance includes electrical apparatus body and electrical apparatus door and switch door system, the switch door system be used for with the electrical apparatus door is closed and is opened.

The utility model has the advantages that:

the utility model provides a planetary gear clutch, a door opening and closing system and a household appliance, wherein the planetary gear clutch is used for intermittently connecting a power part and a driven gear; the planetary gear clutch comprises a position detection assembly, a base, a planetary support, a sun wheel and a planetary wheel set, wherein the planetary support and the sun wheel are both rotatably arranged on the base, and the sun wheel is in transmission connection with a power part; the planetary wheel set is rotatably arranged on the planetary support and is in transmission connection with the sun wheel; the power part drives the sun gear to rotate around the first direction or the second direction, so that the planet carrier can be driven to rotate between the first position and the second position, and when the planet carrier is located at the first position, the planet gear set can drive the driven gear to rotate around the first direction; when the planet support is located at the second position, the planet wheel set can drive the driven gear to rotate around the second direction; when the planet carrier is located at a third position between the first position and the second position, the planet wheel set cannot drive the driven gear to rotate. With the help of the setting of above-mentioned structure, realized the intermittent type nature control to driven gear, when needs control refrigerator door is opened, planet wheel group drives driven gear corotation, and then open the refrigerator door through the connecting rod, when needs control refrigerator door is closed, planet wheel group drives driven gear reversal, and then close the refrigerator door through the connecting rod, when power spare is opening the door or the action of closing the door is ended, when rotating the intermediate position that makes planet support rotate primary importance and second position to former rotation direction opposite direction, planet wheel group and driven gear separation, at this moment, if manual switch refrigerator door, need not to overcome the resistance that planet gear clutch or power spare produced, the switch of refrigerator door is laborsaving more, and be favorable to improving user experience.

Drawings

Fig. 1 is a schematic perspective view of a planetary gear clutch according to an embodiment of the present invention;

fig. 2 is a schematic top view of the planetary gear clutch according to the embodiment of the present invention;

fig. 3 is a schematic view of a planetary gear clutch (single pinion) structure according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a first planetary gear in the embodiment of the present invention;

fig. 5 is a schematic diagram of the internal structure of the planetary gear clutch (the middle support 22 and the upper support are screwed together) according to the embodiment of the present invention;

fig. 6 is a schematic view of an internal structure of a planetary gear clutch according to an embodiment of the present invention.

In the figure:

100. a power member; 200. a driven gear;

a. a first angle; b. a second angle;

1. a base; 11. a first boss; 12. a second boss; 13. a first stopper portion; 14. a second stopper portion;

2. a planet carrier; 21. a bottom bracket; 211. a first limiting part; 212. a second limiting part; 22. a middle support; 23. an upper layer bracket; 24. a connecting member; 25. a sun shaft; 26. a planet shaft;

3. a sun gear;

4. a first planet gear; 41. a first friction part;

5. a second planet wheel;

6. a position detection component; 61. a detection lever; 62. a detection member; 63. a magnet;

7. a speed reduction assembly.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

Example one

As shown in fig. 1-2, the present embodiment provides a planetary gear clutch for intermittently connecting a power member 100 with a driven gear 200; the planetary gear clutch comprises a base 1, a planetary support 2, a sun gear 3, a first planetary gear 4 and a second planetary gear 5, wherein the planetary support 2 is rotatably arranged on the base 1, the sun gear 3 is rotatably arranged on the base 1 and is in transmission connection with a power part 100, and the rotation centers of the sun gear 3 and the planetary support 2 are the same; the planetary wheel set is rotatably arranged on the planetary support 2 and is in transmission connection with the sun wheel 3; the power part 100 drives the sun gear 3 to rotate around the first direction or the second direction to drive the planet carrier 2 to rotate between the first position and the second position, and when the planet carrier 2 is located at the first position, the planet wheel set is meshed with the driven gear 200 and can drive the driven gear 200 to rotate around the first direction; when the planet carrier 2 is located at the second position, the planet wheel set is meshed with the driven gear 200 and can drive the driven gear 200 to rotate around the second direction; with the planet carrier 2 in a third position intermediate the first and second positions, the set of planet wheels is disengaged from the driven gear 200. The horizontal line in fig. 2 is a reference line of the angle. Wherein the link lever may be hinged between the driven gear 200 and the refrigerator door. With the help of the setting of above-mentioned structure, realized the intermittent type nature control to driven gear 200, when the needs control refrigerator door is opened, planet wheel group drives driven gear 200 corotation, and then open the refrigerator door through the connecting rod, when needs control refrigerator door is closed, planet wheel group drives driven gear 200 reversal, and then close the refrigerator door through the connecting rod, when power part 100 is opening the door or the action of closing the door is ended, when rotating to former opposite direction of rotation direction and making planet support 2 rotate the third position, planet wheel group and driven gear 200 separation, at this moment, if the manual switch refrigerator door, need not to overcome the resistance that planet gear clutch or power part 100 produced, the switch of refrigerator door is laborsaving more, and be favorable to improving user experience.

Referring to fig. 2, the planet carrier 2 rotates to a first angle a when located at the first position, and rotates to a second angle b when located at the second position.

Specifically, the planetary wheel set comprises a first planetary wheel 4 and a second planetary wheel 5, which are both rotatably arranged on the planetary carrier 2 and are both in transmission connection with the sun wheel 3; the power part 100 drives the sun gear 3 to rotate around the first direction or the second direction to drive the planet carrier 2 to rotate between the first position and the second position, and when the planet carrier 2 is located at the first position, the first planet gear 4 can be meshed with the driven gear 200 and drive the driven gear 200 to rotate around the first direction; when the planet carrier 2 is located at the second position, the second planet wheel 5 is meshed with the driven gear 200 and drives the driven gear 200 to rotate around the second direction; when the planet carrier 2 is in the third position, both the first planet wheel 4 and the second planet wheel 5 are disengaged from the driven gear 200. In another embodiment of the present embodiment, the planetary gear set includes a third planet gear 8, and the third planet gear 8 is rotatably disposed on the planet carrier 2 and is in transmission connection with the sun gear 3; the planetary gear clutch further comprises a first intermediate gear 201 and a second intermediate gear 202, wherein the first intermediate gear 201 and the second intermediate gear 202 are rotatably arranged on the base 1 and are meshed with the driven gear 200; the power part 100 drives the sun gear 3 to rotate around the first direction or the second direction to drive the planet carrier 2 to rotate between the first position and the second position, and when the planet carrier 2 is located at the first position, the third planet gear 8 can be meshed with the first intermediate gear 201 and drive the driven gear 200 to rotate around the second direction; when the planet carrier 2 is located at the second position, the third planet gear 8 is meshed with the second intermediate gear 202 and drives the driven gear 200 to rotate around the first direction; when the planet carrier 2 is in the third position, the third planet 8 is separated from both the first intermediate gear 201 and the second intermediate gear 202 and is located between the third planet 8 and the first intermediate gear 201. By the arrangement of two planetary gears or one planetary gear and two intermediate gears, the forward and reverse rotation of the driven gear 200 can be driven and switched.

It should be noted that, regardless of the engagement between the first and second planetary gears 4 and 5 and the driven gear 200, or the engagement between the third planetary gear 8 and the first and second intermediate gears 201 and 202, the centers of the two gears and the center of the sun gear 3 in the engaged state form an obtuse triangle. Exemplarily, when the first planetary gear 4 and the driven gear 200 are engaged, the center of the first planetary gear 4, the center of the driven gear 200, and the center of the sun gear 3 form an obtuse triangle.

In this embodiment, the rotation in the first direction is a forward rotation, and the rotation in the second direction is a reverse rotation. Alternatively, the sun gear 3 rotates forward and rotates the planet carrier 2 to the first position, i.e. the position shown in fig. 2, and the sun gear 3 rotates backward and rotates the planet carrier 2 to the second position.

As shown in fig. 4, in order to smoothly rotate the planet carrier 2 between the first position and the second position during the rotation of the sun gear 3, the first planet gear 4 is provided with a first friction portion 41, the base 1 is provided with a first boss 11, and the first friction portion 41 abuts against the first boss 11. With the above arrangement, the sun gear 3 drives the first planet gear 4 to rotate during rotation, and due to the abutting relationship between the first friction part 41 and the first boss 11, the first planet gear 4 revolves around the axis of the sun gear 3 while rotating, and further drives the planet carrier 2 to rotate from the second position to the first position. In another embodiment, the second planet wheels 5 are provided with a second friction portion, and the base 1 is provided with a second boss 12, the second friction portion being in abutment with the second boss 12. Of course, in order to increase the friction force, the solution of the first boss 11 and the second boss 12 may exist at the same time. Specifically, the first friction portion 41 is a ring-shaped friction block, the ring-shaped friction block and the first planetary gear 4 are concentrically arranged, and an outer diameter dimension of the ring-shaped friction block is smaller than an outer diameter dimension of the first planetary gear 4. The second friction portion has the same structure as the first friction portion 41. The above sizing arrangement facilitates reducing the footprint of the clutch.

In the embodiment in which the planetary wheel set comprises only the third planet wheel 8, the third planet wheel 8 is provided with a third friction portion, and the chassis 1 is provided with a third boss, against which the third friction portion abuts. Wherein the third friction portion and the third boss may be configured with reference to the first friction portion and the first boss.

The sun wheel 3 comprises a first sun wheel and a second sun wheel which are concentrically and fixedly connected, and the outer diameter of the first sun wheel is larger than that of the second sun wheel; the first planet wheel 4 and the second planet wheel 5 are both in mesh with the sun second wheel. The sun gear 3 of the above-described structure can achieve the effect of deceleration. In another embodiment, the third planet 8 is in mesh with the sun second wheel.

Regarding the structure of the planet carrier 2, in the present embodiment, optionally, the planet carrier 2 includes an intermediate carrier 22 and an upper carrier 23 connected in sequence from bottom to top, a first sun wheel is located below the intermediate carrier 22, and a second sun wheel is located between the intermediate carrier 22 and the upper carrier 23. Further, the planet carrier 2 also comprises a bottom carrier 21, the sun first wheel being located between the bottom carrier 21 and the intermediate carrier 22. In the embodiment, by means of the arrangement of the structure, on one hand, the total area of the planetary gear clutch is favorably reduced, the occupied space is reduced, and the planetary gear clutch is more exquisite; on the other hand, the planetary gear clutch can also play a role in speed reduction.

In another embodiment of the present embodiment, the planet carrier 2 includes a bottom carrier 21 and an upper carrier 23 connected in series from bottom to top, and the sun gear 3 is located between the bottom carrier 21 and the upper carrier 23. The device is simple in structure and lower in cost.

The planet carrier 2 further comprises a sun shaft 25, the base 1 is provided with a pillow block, a shaft hole is formed in the middle of the pillow block, the sun shaft 25 is arranged in the shaft hole, the sun gear 3 penetrates through the sun shaft 25, and the planet carrier 2 is rotatably arranged on the periphery of the pillow block. This arrangement allows no friction between the sun gear 3 and the planet carrier 2, thereby improving the service life of the planet carrier 2.

As shown in fig. 5, optionally, the planet carrier 2 further includes a planet shaft 26, the planet shaft 26 is disposed between the middle carrier 22 and the upper carrier 23, the first planet wheel 4 and the second planet wheel 5 are respectively disposed through the two planet shafts 26, and the middle carrier 22 and the upper carrier 23 are screwed or connected through the connecting member 24 or integrally formed. Preferably, the middle support 22, the upper support 23 and the bottom support 21 are screwed, and the bottom support 21 is provided with a rotary hole which is sleeved on the pillow block.

Specifically, the connecting member 24 is a rod-like structure. The device has simple structure, light weight and low cost. Of course, in the embodiment where the bottom bracket 21 and the middle bracket 22 are integrally formed, the bottom bracket 21 and the middle bracket 22 may be enclosed by a guard plate, and two sides of the guard plate are respectively fixedly connected to the bottom bracket 21 and the middle bracket 22, so as to reserve a connection port between the sun gear 3 and the power member 100.

Optionally, the sun shaft 25 passes through the intermediate carrier 22. Two ends of the planet shaft 26 are respectively connected with the middle bracket 22 and the upper bracket 23; the first planet wheel 4 and the second planet wheel 5 are respectively arranged through the two planet shafts 26. The arrangement of the planet shaft 26 can be used as a rotating shaft of the first planet wheel 4 and the second planet wheel 5 on one hand, and can also play a role in connecting the middle bracket 22 and the upper bracket 23 on the other hand, so that the planet shaft has two purposes, is ingenious in structure, and saves materials and cost.

In order to enable the planet carrier 2 to better transmit power to the continuously rotating first planet wheel 4 and second planet wheel 5 when the planet carrier 2 is in the first position and the second position, as shown in fig. 6, in this embodiment, optionally, the planet gear clutch further comprises a first stop assembly and/or a second stop assembly, and when the planet carrier 2 rotates from the second position to the first position, the first stop assembly prevents the planet carrier 2 from continuously rotating; when the planet carrier 2 rotates from the first position to the second position, the second stop assembly prevents the planet carrier 2 from rotating further.

Specifically, the first stopping assembly includes a first limiting portion 211 disposed on the planet carrier 2 and a first stopping portion 13 disposed on the base 1, when the planet carrier 2 rotates to the first position, the first limiting portion 211 abuts against the first stopping portion 13, at this time, the first planet gear 4 continues to rotate, and transmits power to the driven gear 200. The second stopping assembly further comprises a second limiting part 212 arranged on the planet carrier 2 and a second stopping part 14 arranged on the base 1, when the planet carrier 2 rotates to the second position, the second limiting part 212 abuts against the second stopping part 14, at this time, the first planet wheel 4 continues to rotate, and power is transmitted to the driven gear 200. Alternatively, the first limiting portion 211 and the second limiting portion 212 are both disposed on the bottom bracket 21 or the middle bracket 22, or the bottom bracket 21 and the middle bracket 22 are both disposed with the first limiting portion 211 and the second limiting portion 212. Alternatively, in this embodiment, the first position-limiting part 211 and the second position-limiting part 212 are respectively located at two side edges of the same corner of the middle bracket 22. In this embodiment, the second stopping portion 14 is a screw hole seat on the base 1, an upper cover covering the base 1 is provided with a mounting hole, a fixing screw passes through the mounting hole and then is screwed into the screw hole of the screw hole seat, the second limiting portion 212 abuts against the outer side wall of the screw hole seat, and the planetary gear clutch is disposed in the mounting cavity between the upper cover and the base 1.

Further, in order to determine the position of the planet carrier 2, in the present embodiment, optionally, the planet gear clutch further includes a position detecting component 6, and the position detecting component 6 is used for detecting the rotation angle of the planet carrier 2. Through setting up position detection subassembly 6, can detect the position of the check point of planet carrier 2, and then can adjust the rotation time of power spare 100, when detecting that the check point on planet carrier 2 is located first position department or second position department, then can verify that the rotation time of power spare 100 is comparatively accurate, after power spare 100 rotates the stop of default time, the check point is the position at first position or second position, then need restart power spare 100, so that the check point is located accurate position, and the same is said, can check the position whether the point is between first position and second position, avoid the reduction that far mechanical transmission structure leads to the transmission precision or the precision of power spare 100 is low to lead to the position of check point not accurate problem.

Specifically, the position detecting assembly 6 includes a detecting rod 61 and a detecting member 62, the detecting member 62 is disposed on the base 1, the detecting rod 61 is disposed on the planet carrier 2, when the planet carrier 2 is located at least one of the first position, the second position or the third position, the detecting rod 61 can be detected by the detecting member 62, and the third position is located between the first position and the second position. By means of the arrangement, the specific position of the planet carrier 2 can be judged in real time, and then the rotation direction and the rotation angle of the planet carrier 2 after the door is opened and closed can be determined, so that the first planet wheel 4 and the second planet wheel 5 are ensured to be separated from the driven gear 200. Wherein, after the door is opened, the planet carrier 2 needs to be rotated counterclockwise by a preset angle so that both the first planet gear 4 and the second planet gear 5 are separated from the driven gear 200. Optionally, the detecting rod 61 is provided on the upper bracket 23, and preferably, the detecting rod 61 is integrally formed with the upper bracket 23. In one embodiment of the present embodiment, the detecting members 62 are provided in two, and are respectively provided at the first position and the second position, and the detecting lever 61 can be detected when the planetary carrier 2 is located at the first position or the second position. Through the detection of two position points of the planet carrier 2 at the first position and the second position, the position function of the planet carrier 2 can be corrected, the workload is effectively reduced, the cost is reduced, and the working efficiency is improved. In another embodiment of this embodiment, one of the detecting members 62 is provided, and the detecting member 62 is provided at the third position, and the detecting lever 61 can be detected when the planetary carrier 2 is located at the third position.

Of course, in other embodiments, the angle of rotation of the planet carrier 2 may be measured by an angular encoder, if there are other factors that affect the need to detect the angular position of the planet carrier 2 in real time. In view of installation space and convenience, the form in which the detection lever 61 and the detection piece 62 are fitted is preferable in the present embodiment, and the following description is made with respect to specific arrangements of the detection piece 62 and the detection lever 61.

The detection piece 62 comprises two hall sensors, one end of the detection rod 61, which is far away from the planet carrier 2, is provided with a magnet 63, and when the planet carrier 2 is located at the first position, one of the hall sensors can detect the magnet 63 and generate a first sensing signal; when the planet carrier 2 is in the second position, the other hall sensor can detect the magnet 63 and generate a second sensing signal. In this embodiment, the detection point is a magnet at the tip of the detection rod 61. Certainly, it should be noted that the planetary gear clutch further includes a controller, the controller is in communication connection with both the power component 100 and the hall sensor, the controller can determine the specific position of the planetary carrier 2 after receiving the first sensing signal and the second sensing signal, and after completing the door opening or closing action, the controller can control the power component 100 to rotate forward or backward by a preset angle, so as to drive the planetary carrier 2 to rotate from the first position or the second position to the intermediate position, i.e., the third position.

In order to improve the transmission torque of the power member 100, in this embodiment, the planetary gear clutch further includes a speed reduction assembly 7, an input end of the speed reduction assembly 7 is in transmission connection with the power member 100, and an output end of the speed reduction assembly 7 is in transmission connection with the sun gear 3. Specifically, the speed reduction assembly 7 includes a first speed reduction wheel and a second speed reduction wheel which are engaged with each other, an input end of the first speed reduction wheel is engaged with the power member 100, and an output end of the second speed reduction wheel is engaged with an input end of the sun gear 3. Optionally, a worm is connected to the output end of the power member 100, and the worm is engaged with the first reduction gear.

Example two

The embodiment also provides a door opening and closing system, which comprises a power part 100, a driven gear 200 and the planetary gear clutch of the first embodiment, wherein the driven gear 200 is used for opening or closing the door, and the planetary gear clutch is used for intermittently connecting the power part 100 and the driven gear 200.

EXAMPLE III

The present embodiment further provides a household appliance, preferably, the household appliance may be a refrigerator, the refrigerator includes a refrigerator body, a refrigerator door, and the door opening and closing system of the second embodiment, the door opening and closing system is used for closing or opening the refrigerator door.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A planetary gear clutch for intermittently connecting a power member (100) with a driven gear (200); it is characterized by comprising:

a base (1);

the planet carrier (2) is rotatably arranged on the base (1);

the sun wheel (3) is rotatably arranged on the base (1) and is in transmission connection with the power part (100);

the planetary wheel set is rotatably arranged on the planetary support (2) and is in transmission connection with the sun wheel (3);

the power part (100) drives the sun gear (3) to rotate around a first direction or a second direction to drive the planet carrier (2) to rotate between a first position and a second position, and when the planet carrier (2) is located at the first position, the planet wheel set is meshed with the driven gear (200) and can drive the driven gear (200) to rotate around the first direction; when the planet carrier (2) is located at the second position, the planet wheel set is meshed with the driven gear (200) and drives the driven gear (200) to rotate around a second direction; the planetary set is disengaged from the driven gear (200) when the planet carrier (2) is in a third position intermediate the first and second positions.

2. A planetary gear clutch according to claim 1, characterized in that the planetary gear set comprises a first planetary gear (4) and a second planetary gear (5), both rotatably arranged on the planet carrier (2) and both in transmission connection with the sun gear (3); when the planet carrier (2) is located at the first position or the second position, the first planet wheel (4) and the second planet wheel (5) are selected to be meshed with the driven gear (200) and drive the driven gear (200) to rotate around the first direction or the second direction; when the planet carrier (2) is located at the third position, the first planet wheel (4) and the second planet wheel (5) are both separated from the driven gear (200).

3. A planetary gear clutch according to claim 2, characterized in that the first planet gear (4) is provided with a first friction portion (41), the chassis (1) is provided with a first boss (11), and the first friction portion (41) abuts against the first boss (11); and/or

The second planet wheel (5) is provided with a second friction part, the base (1) is provided with a second boss (12), and the second friction part is abutted to the second boss (12).

4. A planetary gear clutch according to claim 1, characterized in that the planetary gear set comprises a third planetary gear (8) rotatably arranged on the planetary carrier (2) and in transmission connection with the sun gear (3), the planetary gear clutch further comprises a first intermediate gear (201) and a second intermediate gear (202) rotatably arranged on the base (1) and both engaged with the driven gear (200), and when the planetary carrier (2) is in the first position or the second position, the third planetary gear (8) can be engaged with the first intermediate gear (201) or the second intermediate gear (202) and drive the driven gear (200) to rotate in the second direction or the first direction; when the planet carrier (2) is located at the third position, the third planet wheel (8) is separated from both the first intermediate gear (201) and the second intermediate gear (202).

5. A planetary gear clutch according to claim 1, characterized in that it further comprises a first and/or a second stop assembly, said first stop assembly preventing the planetary carrier (2) from continuing to rotate when the planetary carrier (2) rotates from the second position to the first position; when the planet carrier (2) rotates from the first position to the second position, the second stop component prevents the planet carrier (2) from rotating continuously.

6. The planetary gear clutch according to claim 5, wherein the first stop assembly comprises a first limit portion (211) provided on the planet carrier (2) and a first stop portion (13) provided on the base (1), and when the planet carrier (2) rotates to the first position, the first limit portion (211) abuts against the first stop portion (13); and/or

The second stopping component comprises a second limiting part (212) arranged on the planet carrier (2) and a second stopping part (14) arranged on the base (1), and when the planet carrier (2) rotates to the second position, the second limiting part (212) is abutted to the second stopping part (14).

7. A planetary gear clutch according to any of claims 1-6, characterized in that it further comprises a position detection assembly (6), said position detection assembly (6) being adapted to detect the position of the planet carrier (2).

8. Planetary gear clutch according to claim 7, characterized in that the position detection assembly (6) comprises a detection lever (61) provided to the planet carrier (2) and a detection member (62) provided to the base (1), the detection lever (61) being detectable by the detection member (62) when the planet carrier (2) is in at least one of the first position, the second position or the third position.

9. A door opening and closing system, characterized by comprising a power member (100), a driven gear (200) and a planetary gear clutch according to any one of claims 1-8, wherein the driven gear (200) is used for opening or closing the door, and the planetary gear clutch is used for intermittently connecting the power member (100) and the driven gear (200).

10. A household appliance comprising an appliance body and an appliance door, and the opening and closing door system of claim 9 for closing and opening the appliance door.

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