CN211950080U - Ejecting device and refrigerator - Google Patents

Abstract

The utility model relates to a refrigerator technical field discloses an ejecting device and refrigerator, wherein ejecting device includes the casing, power component, drive assembly and knock-out pole, first rack and second rack all with knock-out pole fixed connection, drive assembly is connected with the power component transmission, drive assembly includes the composite gear subassembly, first rack and second rack, the composite gear subassembly includes coaxial setting and fixed connection's first gear and second gear, the diameter of the first reference circle of first gear is less than the diameter of the second reference circle of second gear, power component can drive first gear and first rack toothing and stretch out the casing in order to drive the knock-out pole, can also drive second gear and second rack toothing and continue to stretch out the casing in order to drive the knock-out pole after first gear and first rack are disengaged. The utility model discloses an ejecting device has solved the problem of the required thrust of each stage and the difference of translation rate when pushing up the refrigerator door, has improved the smooth and easy degree of opening the door.

Description

Ejecting device and refrigerator

Technical Field

The utility model relates to a refrigerator technical field especially relates to an ejecting device and refrigerator.

Background

Among the prior art, the ejecting rod of the ejecting device that the refrigerator that automatically opens the refrigerator door set up generally keeps certain interval with the refrigerator door, and when actually opening the refrigerator door, ejecting device adopts fixed thrust and makes the refrigerator door open with fixed speed mostly, because there is suction between the magnetism door seal on the refrigerator door and the refrigerator metal box when the refrigerator door is in the closed condition, consequently ejecting device pushes away and closes the required power of initial stage of well refrigerator door the biggest.

Among the prior art, at the initial stage that the refrigerator door was opened, after the refrigerator door rotated a less angle for the box, the refrigerator door had broken away from and the box between the suction, continued to rotate the refrigerator door, because the resistance of the door auxiliary device that closes of refrigerator makes the refrigerator door still need certain thrust in the angle of predetermineeing of the opening stage, the required thrust of this stage is little than the initial stage, but the stroke is longer.

The refrigerator door is opened to the speed that current can open the refrigerator door automatically mostly adopts comparatively slow, and the striking to the refrigerator door when ejecting device and refrigerator door butt this moment reduces, but the opening rate of the refrigerator door of this kind of refrigerator is slower, needs longer time just can open the refrigerator door. If the opening speed of the refrigerator door is faster, the push force is larger, so that the ejection device collides with the refrigerator door to generate larger sound.

SUMMERY OF THE UTILITY MODEL

Based on the above, an object of the utility model is to provide an ejecting device has solved the problem that the refrigerator door opening time that exists with fixed thrust and speed open the refrigerator door and lead to is longer or ejecting device and refrigerator door produce great striking that prior art exists.

Another object of the utility model is to provide a refrigerator can realize opening fast of refrigerator door.

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

an ejection device comprises a shell, a power assembly, a transmission assembly and an ejection rod, wherein the transmission assembly is positioned in the shell and is in transmission connection with the power assembly, the ejection rod is slidably mounted on the shell, the transmission assembly comprises a composite gear set, a first rack and a second rack, the first rack and the second rack are both fixedly connected with the ejection rod, the composite gear set comprises a first gear and a second gear which are coaxially arranged and fixedly connected, the first gear can be meshed with the first rack, the second gear can be meshed with the second rack, and the diameter of a first reference circle of the first gear is smaller than that of a second reference circle of the second gear; the power assembly can drive the first gear and the first rack to be meshed so as to drive the ejector rod to extend out of the shell, and can also drive the second gear and the second rack to be meshed so as to drive the ejector rod to continue to extend out of the shell after the first gear and the first rack are disengaged.

As an optimal scheme of the ejection device, a first notch is arranged on the first gear, a second notch is arranged on the second gear, the ejection device further comprises a first elastic piece, one end of the first elastic piece is connected with the shell, the other end of the first elastic piece is connected with the ejection rod, the first elastic piece resets when the ejection rod is pushed, the first rack can slide through the first notch and is not meshed with the first gear, and the second rack can slide through the second notch and is not meshed with the second gear.

As a preferable scheme of the ejection device, the ejection device further includes a circuit board, a position switch, and a position collision block, the position switch is mounted on the circuit board, the circuit board is mounted on the housing, the position switch is electrically connected to the power assembly, the position collision block is disposed on the compound gear set, and the position collision block can touch the position switch to close the power assembly when the second gear is disengaged from the second rack.

As a preferable aspect of the ejector device, the length of the first rack is smaller than the length of the second rack.

As a preferable mode of the ejection device, a module of the first gear is larger than a module of the second gear.

As a preferable scheme of the ejection device, the ejection device further comprises a reset assembly, the reset assembly is arranged on the housing, and the reset assembly can push the first gear to rotate along a direction that the ejection rod is driven to extend out of the housing.

As a preferable scheme of the ejection device, the reset assembly includes a push rod and a second elastic member, one end of the second elastic member is connected to the housing, the other end of the second elastic member is connected to the push rod, the push rod can push the first gear to rotate along the direction of driving the ejection rod to extend out of the housing, and the second elastic member can reset the push rod so that the push rod is separated from the first gear.

As a preferred scheme of the ejection device, the power assembly comprises a motor, a reduction gear set, a worm and a worm gear assembly, the worm is arranged at the output end of the motor, the worm gear assembly can be respectively meshed with the worm and the reduction gear set, and the reduction gear set is in transmission connection with the compound gear set.

As a preferred scheme of the ejection device, the reduction gear set is a one-way reduction gear set, the one-way reduction gear set comprises an input stage gear and an output stage gear, the input stage gear can drive the output stage gear to rotate, and the output stage gear is meshed with the compound gear set.

As a preferable scheme of the ejection device, the compound gear set further includes a third gear, the third gear is in transmission connection with the power assembly, the third gear and the second gear are integrally formed, a third meshing tooth of the third gear and a second meshing tooth of the second gear are integrally formed into a compound tooth, the compound tooth extends along an axial direction of the third gear, and the compound tooth is meshed with the output stage gear when the first gear is meshed with the first rack.

As a preferred scheme of the ejection device, the ejection device further comprises a clutch lever assembly, the clutch lever assembly is arranged on the shell, and the clutch lever assembly can disconnect the transmission connection between the power assembly and the transmission assembly.

As a preferable mode of the ejection device, the clutch lever assembly includes a first clutch lever assembly, the first clutch lever assembly includes a first clutch lever body and a fourth elastic member, one end of the fourth elastic member is connected to the housing, the other end of the fourth elastic member abuts against the first clutch lever body, the first clutch lever body can force the input stage gear and the output stage gear to be disconnected in transmission, and the fourth elastic member can reset the first clutch lever body to connect the input stage gear and the output stage gear in transmission.

As a preferred scheme of the ejection device, the ejection device further comprises a second clutch lever assembly, the second clutch lever assembly comprises a second clutch lever body and a fifth elastic piece, one end of the fifth elastic piece is connected with the shell, the other end of the fifth elastic piece is abutted to the second clutch lever body, the second clutch lever assembly can force the transmission connection of the worm and the worm wheel assembly to be disconnected, and the fifth elastic piece can reset the second clutch lever body so that the worm and the worm wheel assembly are in transmission connection.

The refrigerator comprises a refrigerator body, a refrigerator door and the ejection device in any scheme, wherein the refrigerator door is rotatably connected onto the refrigerator body, the ejection device is arranged on the refrigerator body, and an ejection rod can be abutted against the refrigerator door.

The utility model has the advantages that: the utility model discloses an ejection device, when the power component makes the compound gear set rotate with the same output torque, because the diameter of the first reference circle of the first gear is smaller, so that the first gear has larger thrust when meshing with the first rack, and because the angular velocity of the first gear is the same as that of the second gear, so that the first gear drives the first rack to move at a smaller speed, thus not only ensuring that the refrigerator door has larger thrust when just starting to open to overcome the magnetic attraction between the magnetic door seal on the refrigerator door and the metal box body of the refrigerator, but also ensuring that the ejection piece is abutted with the refrigerator door at a slower speed to reduce the impact on the refrigerator door, along with the opening of the refrigerator door, the magnetic attraction between the refrigerator door and the box body is gradually reduced, because the resistance of the door closing auxiliary device at the initial section of opening the door still needs to be overcome, at the moment, the second gear meshes with the second rack, because the diameter of the second reference circle of the second gear is large, the thrust of the second gear to the ejection rod is reduced, and meanwhile, the second gear drives the second rack to move at a large speed, so that the refrigerator door can be quickly opened, the opening time of the refrigerator door is shortened, and the use satisfaction of a user is increased.

The utility model discloses a refrigerator can realize opening fast of refrigerator door owing to have foretell ejecting device.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic view of an ejection device according to an embodiment of the present invention;

fig. 2 is a schematic view of an ejector according to an embodiment of the present invention, after a portion of the housing is removed, when the first gear and the first rack are about to engage;

fig. 3 is a schematic diagram of a first gear, a second gear, a third gear and a position collision block according to a first embodiment of the present invention;

fig. 4 is a schematic view of the second gear engaging with the second rack after the first spring and the housing are removed according to the first embodiment of the present invention;

fig. 5 is a schematic view of an ejector according to a first embodiment of the present invention, after removing a portion of the housing and the first spring, when the second gear and the second rack are about to be disengaged;

fig. 6 is a schematic view of an ejection device according to an embodiment of the present invention after removing the casing;

fig. 7 is a schematic diagram of a compound gear set according to an embodiment of the present invention;

fig. 8 is an exploded view of a compound gear set and a third resilient member according to an embodiment of the present invention;

fig. 9 is a schematic view of the ejection device according to the second embodiment of the present invention with the housing removed;

fig. 10 is a schematic view of the ejector device according to the third embodiment of the present invention with the housing removed;

fig. 11 is a disassembled view of the second clutch lever assembly, the worm and worm gear assembly provided in the third embodiment of the present invention;

fig. 12 is a schematic view of the lower housing, the second trip lever body, the fifth elastic member and the mating member according to the third embodiment of the present invention;

fig. 13 is a schematic view of an upper housing according to a third embodiment of the present invention.

In the figure:

1. a housing; 101. mounting a boss; 102. a guide rail; 103. a guide projection;

2. a power assembly; 21. a motor; 22. a reduction gear set; 221. an input stage gear; 222. an output stage gear; 2221. a wedge block; 223. a first rotational connection; 2230. a limiting groove; 224. a second rotating link; 2240. a wedge-shaped groove; 2241. a second limiting block; 23. a third elastic member;

3. a transmission assembly; 31. a compound gear set; 311. a first gear; 3110. a first notch; 312. a second gear; 3120. a second notch; 313. a third gear; 32. a first rack; 33. a second rack;

4. ejecting the rod; 5. a first elastic member; 61. a circuit board; 62. a position switch; 7. a position bump block;

8. a reset assembly; 81. a push rod; 82. a second elastic member;

91. a worm; 92. a worm gear assembly;

11. a first clutch lever assembly; 111. a first clutch lever body; 1111. a first hand push bar; 1112. a transition section; 1113. a separation section; 1114. a guide post; 112. a fourth elastic member;

121. a second trip lever body; 1211. a second hand push rod; 1212. a limiting column; 1213. a pusher member; 122. a fifth elastic member; 123. a mating member; 124. a slider; 1240. a chute; 1241. a limiting bulge; 125. and a sixth elastic member.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts 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" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

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, e.g., as meaning either a fixed connection or a removable connection; 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.

Example one

The present embodiment provides an ejection apparatus, as shown in fig. 1 to 6, the apparatus includes a housing 1, a power assembly 2, a transmission assembly 3 and an ejection rod 4, the ejection rod 4 is slidably mounted on the housing 1, the transmission assembly 3 is located in the housing 1 and is in transmission connection with the power assembly 2, the transmission assembly 3 includes a composite gear set 31, a first rack 32 and a second rack 33, the first rack 32 and the first rack 33 are both fixedly connected with the ejection rod 4, the composite gear set 31 includes a first gear 311 and a second gear 312 coaxially disposed and fixedly connected, the first gear 311 can be engaged with the first rack 32, the second gear 312 can be engaged with the first rack 33, a diameter of a first pitch circle of the first gear 311 is smaller than a diameter of a second pitch circle of the second gear 312, the power assembly 2 can drive the first gear 311 to be engaged with the first rack 32 to drive the ejection rod 4 to extend out of the housing 1, the second gear 312 can also be driven to engage with the first rack 33 after the first gear 311 is disengaged from the first rack 32 so as to drive the ejection rod 4 to continue to extend out of the housing 1.

The liftout attachment provided by this embodiment can realize the quick opening of the refrigerator door, specifically, when the power assembly 2 rotates the compound gear set 31 with the same output torque, because the diameter of the first reference circle of the first gear 311 is smaller, so that there is a larger thrust when the first gear 311 is engaged with the first rack 32, and because the angular velocities of the first gear 311 and the second gear 312 are the same, so that the first gear 311 drives the first rack 32 to move at a smaller velocity, so that it can be ensured that the refrigerator door has a larger thrust to overcome the magnetic force between the magnetic door seal on the refrigerator door and the refrigerator metal box body when just starting to open, and it can also be ensured that the liftout member abuts against the refrigerator door at a slower velocity to reduce the impact on the refrigerator door, along with the opening of the refrigerator door, the magnetic force between the refrigerator door and the box body is gradually reduced, because the resistance of the door closing auxiliary device at the initial section of the door opening still needs, at this time, the second gear 312 is engaged with the second rack 33, and since the diameter of the second reference circle of the second gear 312 is larger, and the power assembly 2 still rotates the compound gear set 31 with the same output torque at this time, the thrust when the second gear 312 is engaged with the second rack 33 is reduced, and because the angular velocities of the first gear 311 and the second gear 312 are the same, the velocity when the second gear 312 drives the second rack 33 to move is increased, so that the refrigerator door can be quickly opened, the opening time of the refrigerator door is shortened, and the use satisfaction of a user is increased.

In order to realize the automatic reset of the eject lever 4, as shown in fig. 3, the first gear 311 is provided with a first notch 3110 for preventing the power assembly 2 from transmitting power to the eject lever 4 through the first gear 311, the second gear 312 is provided with a second notch 3120 for preventing the power assembly 2 from transmitting power to the eject lever 4 through the second gear 312, the ejection device also comprises a first elastic piece 5, the first elastic piece 5 is a spring, one end of the first elastic piece 5 is connected with the shell 1, the other end is connected with the ejection rod 4, when the first elastic piece 5 is reset to the ejection rod 4, the first rack 32 can slide through the first notch 3110 and not engage with the first gear 311, the second rack 33 can slide through the second notch 3120 and not engage with the second gear 312, that is, the existence of the first notch 3110 and the second notch 3120 enables the first elastic member 5 to rapidly reset the eject lever 4.

In order to realize the automatic closing of the power assembly 2, as shown in fig. 2 and 5, the ejection device of the present embodiment further includes a circuit board 61, a position switch 62, and a position bump 7, wherein the position switch 62 is mounted on the circuit board 61, the circuit board 61 is disposed on the housing 1, the position switch 62 is electrically connected to the power assembly 2, the position bump 7 is disposed on the compound gear set 31, and the position bump 7 can touch the position switch 62 to close the power assembly 2 when the second gear 312 is disengaged from the second rack 33. Specifically, as the power assembly 2 drives the compound gear set 31 to rotate, the position switch 62 touches the position bump 7, the second gear 312 is disengaged from the second rack 33, the power assembly 2 stops being electrified, and at this time, under the inertia effect of the power assembly 2, the power assembly 2 drives the compound gear set 31 to continue to rotate by an angle, limited by the friction of the power assembly 2, and the compound gear set 31 stops rotating after rotating by an angle.

Certainly, in other embodiments of the present invention, the position switch 62 and the position bump 7 may not be provided, and a position sensor is provided on the compound gear set 31, when the compound gear set 31 drives the position sensor to rotate to a preset position, the power assembly 2 stops being electrified, so as to open the refrigerator door; in other embodiments, other position sensors or other switches may be disposed on the compound gear set 31, and when the compound gear set 31 drives the position sensors or switches to rotate to a preset position, the power assembly 2 stops being electrified, and the type of the position sensors or switches is specifically set according to actual needs.

Further, as shown in fig. 2, 4 and 5, the length of the first rack 32 is smaller than the length of the second rack 33. According to the prior art, the suction between the magnetic door seal on the refrigerator door and the refrigerator metal box body is gradually reduced along with the opening of the refrigerator door, namely, the refrigerator door is in a closed state and needs larger thrust to an angle, after the refrigerator door rotates by a first angle, the suction between the magnetic door seal on the refrigerator door and the refrigerator metal box body can be basically ignored, the first angle is smaller, namely, the rotating angle of the refrigerator door is within the first angle, the ejecting device needs to overcome the friction between the refrigerator door and a rotating shaft and the magnetic force between the refrigerator body and the refrigerator door, the rotating angle of the refrigerator door at this stage is smaller, namely, the stroke of the ejecting rod 4 of the ejecting device is smaller. The refrigerator door is opened again, the ejection device needs to overcome the friction force between the refrigerator door and the rotating shaft and the resistance of the door closing auxiliary device after the door is opened, but the resistance of the stage is reduced greatly compared with that of the previous stage, the refrigerator door needs to rotate by a second angle, the second angle is larger than the first angle, and the stroke of the ejection rod 4 of the ejection device is larger. Thereafter, the door of the refrigerator continues to open under the effect of inertia, at which point it does not need to be pushed by the ejector rod 4.

As a result, the length of the ejector rod 4 protruding when the first gear 311 and the first rack 32 are engaged is smaller than the length of the second gear 312 and the second rack 33, that is, the length of the first rack 32 is smaller than the length of the second rack 33. Specifically, when the first gear 311 is disengaged from the first rack 32, the refrigerator door rotates by a first angle, and then the second gear 312 is engaged with the second rack 33 to continue opening the refrigerator door, at which time the refrigerator door rotates by a second angle, which is much larger than the first angle.

The distance between the first rack 32 and the second rack 33 along the length direction of the first rack 32 is a predetermined distance, and the second gear 312 and the second rack 33 start to engage when the first gear 311 and the first rack 32 are disengaged. Specifically, if the first gear 311 and the first rack 32 are not disengaged, the second gear 312 and the second rack 33 start to engage, at this time, the ejector device is locked because the speed at which the first gear 311 drives the first rack 32 to drive the ejector rod 4 to move outward is different from the speed at which the second gear 312 drives the second rack 33 to drive the ejector rod 4 to move outward, and at this time, the ejector device cannot continuously push the refrigerator door to open the refrigerator door. If the second gear 312 and the second rack 33 do not start to engage when the first gear 311 and the first rack 32 disengage, the first elastic member 5 drives the eject rod 4 to reset, and at this time, the refrigerator door may not be opened. And this kind of setting of this embodiment, the refrigerator door is opened slowly when first gear 311 and first rack 32 mesh to the smooth switching of the quick opening of refrigerator door when second gear 312 and second rack 33 mesh, and the opening of refrigerator door is comparatively smooth and easy for the opening time of refrigerator door shortens, and user's use satisfaction increases.

For the compact design of the transmission assembly 3, it is required that the module of the first gear 311 is larger than that of the second gear 312, and the module of the first rack 32 is the same as that of the first gear 311, and the module of the second rack 33 is the same as that of the second gear 312, i.e. the module of the first rack 32 is larger than that of the second rack 33.

Specifically, as shown in fig. 2, the power assembly 2 of the present embodiment includes a motor 21 and a reduction gear set 22, the motor 21 is in transmission connection with the reduction gear set 22, and the reduction gear set 22 is in transmission connection with the compound gear set 31 to realize rotation of the compound gear set 31. As shown in fig. 3, the compound gear set 31 further includes a third gear 313, and the third gear 313 is in transmission connection with the reduction gear set 22. In the present embodiment, the first gear 313, the second gear 312, and the third gear 313 are integrally formed, and the module of the third gear 313 is the same as that of the second gear 312, the third meshing tooth of the third gear 313 and the second meshing tooth of the second gear 312 are integrally formed as a composite tooth, the composite tooth extends along the axial direction of the third gear 313, and the composite tooth is engaged with the output-stage gear 222 when the first gear 311 is engaged with the first rack 32. Because the thrust force required when the first gear 311 is engaged with the first rack 32 is large, the torque transmitted between the reduction gear set 22 and the compound gear set 31 is large, that is, the thrust force of the reduction gear set 22 to the third gear 313 of the compound gear set 31 is large. In order to secure the mechanical strength of the compound gear set, the output stage gear 222 is engaged with the compound teeth of the second gear 312 and the third gear 313 of the compound gear set 31 while the first gear 311 is engaged with the first rack 32.

Of course, in other embodiments of the present invention, the positions between the first gear 311 and the second gear 312 and the third gear 313 are not limited to the integrally formed arrangement of the embodiment, and may also be integrally formed arrangement of the second gear 312 and the third gear 313, the second gear 312 and the third gear 313 are provided with gear mounting holes, the gear mounting holes are provided with gear slots, the first gear 311 is mounted in the gear mounting holes, the teeth of the first gear 311 are located in the gear slots, and part of the first gear protrudes out of the second gear, when the motor 21 drives the reduction gear set 22 to drive the third gear 313 to rotate, the first gear 311 can rotate with the third gear 313 at the same angular speed as the third gear 313, the mounting manner is simple and convenient, so that the motor 21 drives the reduction gear set 22 to drive the compound gear set 31 to rotate, and the first gear 311, the second gear 312 and the third gear 313 of the compound gear set 31 rotate at the same angular speed, the three parts can not rotate relatively.

Further, the reduction gear set 22 of the present embodiment is a one-way reduction gear set, as shown in fig. 5 and fig. 6, the one-way reduction gear set includes an input stage gear 221 and an output stage gear 222, the input stage gear 221 can drive the output stage gear 222 to rotate, after the motor 21 is started, the motor 21 drives the input stage gear 221 to drive the output stage gear 222 to rotate, and then the output stage gear 222 drives the compound gear set 31 to drive the ejector rod 4 of the rotary ejector rod 4 to move along the direction extending out of the housing 1.

As shown in fig. 6, the ejection device of the present embodiment further includes a worm gear structure, which includes a worm 91 and a worm wheel assembly 92, wherein the worm 91 is mounted at the output end of the power member 21, and the worm wheel assembly 92 is simultaneously engaged with the worm 91 and the input stage gear 221, and the worm gear structure can drive the input stage gear 221 to rotate in the counterclockwise direction as shown in fig. 7.

As shown in fig. 7 and 8, the reduction gear set 22 further includes a first rotary connector 223 and a second rotary connector 224, the input stage gear 221 is provided with a wedge 2211, and the second rotary connector 224 is provided with a wedge groove 2240 corresponding to the wedge 2211, so that the second rotary connector 223 can only transmit power in one rotation direction but cannot rotate power in the opposite direction. The output stage gear 222 and the first rotating connector 223 are integrally formed, and the second rotating connector 224 is sleeved on the first rotating connector 223. Specifically, a limiting groove 2230 extending along its own axis direction is disposed on an outer surface of the first rotating connecting member 223, and a second limiting block 2241 engaged with the limiting groove 2230 is disposed on the second rotating connecting member 224, so that when the input stage gear 221 rotates in a counterclockwise direction of an arrow direction as shown in fig. 7, the first rotating connecting member 223, the second rotating connecting member 224 and the output stage gear 222 can rotate along with them.

As shown in fig. 8, the power assembly 2 further includes a third elastic member 23, the third elastic member 23 is a spring and is located between the output stage gear 222 and the second rotational connector 224, one end of the third elastic member 23 abuts against the second rotational connector 224, and the other end abuts against the output stage gear 222 so that the second rotational connector 224 abuts against the input stage gear 221.

If external force is used to push the output stage gear 222 to rotate in the counterclockwise direction of the arrow shown in fig. 7, at this time, the output stage gear 222 drives the first rotating connector 223 and the second rotating connector 224 to rotate in the counterclockwise direction and slide relative to the input stage gear 221, due to the wedge 2211 on the input stage gear 221, the input stage gear 221 cannot rotate along with the rotation of the output stage gear 222 in the counterclockwise direction. If the external force is used to push the output stage gear 222 to rotate in the direction opposite to the counterclockwise direction of the arrow shown in fig. 7, the output stage gear 222 drives the first rotating connector 223, the second rotating connector 224 and the input stage gear 221 to rotate in the clockwise direction, but at this time, the worm gear and worm structure is in a locked state, so that the output stage gear 222 cannot rotate in the clockwise direction.

As shown in fig. 5, the ejection device further includes a reset component 8, the reset component 8 is disposed on the housing 1, and the reset component 8 can push the first gear 311 to rotate along the driving ejection rod 4 to the direction of extending out of the housing 1. Specifically, the reset assembly 8 of the present embodiment can drive the first gear 311 to rotate, so as to further rotate the second gear 312, and disengage the second gear 312 from the second rack 33.

As shown in fig. 5, the reset assembly 8 of the present embodiment includes a push rod 81 and a second elastic member 82, the second elastic member 82 is a spring, one end of the second elastic member 82 is connected to the housing 1, and the other end of the second elastic member 82 is connected to the push rod 81, the push rod 81 compresses the second elastic member 82 to move in the direction of extending into the housing 1, so as to drive the first gear 311 to continue to rotate, the second gear 312 is disengaged from the second rack 33, the push rod 81 is released, the second elastic member 82 resets the push rod 81, and the first elastic member 5 resets the ejector rod 4.

Specifically, when a special situation such as sudden power failure occurs, the ejector rod 4 stops at the middle position and cannot be reset, which affects the closing of the refrigerator door, at this time, because the one-way reduction gear set 22 is of a one-way transmission structure, although the motor 21 and the input stage gear 221 cannot rotate in the reverse direction of the counterclockwise direction shown in fig. 7, the output stage gear 222 can rotate in the counterclockwise direction shown in fig. 7, therefore, pulling the ejector rod 4, the ejector rod 4 extends toward the ejection direction thereof, the rack on the ejector rod 4 drives the output gear 222 of the one-way reduction gear set 22 to rotate through the compound gear set 31, when the ejector rod 4 is pulled out to the maximum ejection position, the second gear 312 is engaged with the last tooth of the second rack 33, at this time, the push rod 81 is pushed, the push rod 81 compresses the second elastic member 82 to move in the direction of extending into the housing 1, and further drives the first gear 311 to rotate, at this time, the first elastic member 5 resets the eject lever 4, the second rack 33 can slide through the second notch 3120 and is not engaged with the second gear 312, the first rack 32 can slide through the first notch 3110 and is not engaged with the first gear 311, the push rod 81 is released, and the second elastic member 82 resets the push rod 81. At the moment, the refrigerator door can be manually closed, so that the phenomenon that the refrigerator door cannot be closed due to power failure is avoided.

Preferably, the ejection apparatus of this embodiment further includes a controller (not shown in the drawings), the controller is electrically connected to the motor 21 and the position switch 62, the controller may be a centralized or distributed controller, for example, the controller may be a single chip microcomputer or may be formed by a plurality of distributed single chip microcomputers, and the single chip microcomputers may run a control program to further control the motor 21 and the position switch 62 to implement the functions thereof.

The specific process of opening the refrigerator door by the liftout device of this embodiment is as follows:

in the first stage, the eject lever 4 is located at the initial position, the motor 21 is powered on to start rotating, the motor 21 drives the output stage gear 222 of the reduction gear set 22 to engage with the third gear 313, the third gear 313 drives the first gear 311 and the second gear 312 to rotate, the first gear 311 starts to engage with the first rack 32, as shown in fig. 2, along with the rotation of the first gear 311, the first gear 311 drives the first rack 32 and the eject lever 4 to move at a slower speed, and at this time, the thrust of the eject lever 4 to the refrigerator door is larger;

a second stage, as shown in fig. 4, when the first gear 311 is disengaged from the first rack 32, the second gear 312 is engaged with the first rack 33, the second gear 312 drives the second rack 33 and the eject lever 4 to move at a faster speed, and at this time, the thrust of the eject lever 4 to the refrigerator door is smaller, as shown in fig. 5, until the second gear 312 is disengaged from the second rack 33, the length of the eject lever 4 extending out of the housing 1 reaches a maximum, and at the same time, the position switch 62 touches the position bump 7, so that the motor 21 is powered off, and under the inertia effect of the motor 21, the motor 21 drives the compound gear set 31 to continue to rotate for an angle and then stops rotating;

in the third stage, the first elastic piece 5 pulls the ejection rod 4 to quickly reset to the initial position, and the refrigerator door is continuously opened under the action of inertia.

This embodiment is through according to the different working stroke sections of knock-out lever 4, under the condition that motor 21 and reduction gear group 22 provide the same moment of torsion, the difference of the diameter of the reference circle of utilizing first gear 311 and second gear 312 has solved the required thrust of each stage of ejecting device when the back-open refrigerator door, the different problems of moving speed and each stage knock-out lever 4 stretches out the length of casing 1, the smooth and easy degree of the process of opening the door has been improved, reduce the required time of opening the door, promote user experience.

The present embodiment further provides a refrigerator, which includes a box body (not shown in the drawings), a refrigerator door (not shown in the drawings), and the ejection device described in the present embodiment, the refrigerator door is rotatably connected to the box body, the ejection device is disposed on the box body, and the ejection rod 4 can abut against the refrigerator door.

The refrigerator provided by the embodiment can realize the quick opening of the refrigerator door due to the ejection device.

Example two

The difference between the first embodiment and the second embodiment is that the ejection device of the present embodiment does not include the reset assembly 8, but includes the first clutch lever assembly 11, the first clutch lever assembly 11 is disposed on the housing 1, and the first clutch lever assembly 11 can disconnect the transmission connection between the power assembly 2 and the transmission assembly 3. When special conditions such as sudden power failure occur, the ejector rod 4 stops at the middle position and cannot be reset, and the closing of the refrigerator door is affected, the ejector device of the embodiment and the ejector device of the first embodiment can retract the ejector rod 4 into the shell 1.

Specifically, the first clutch lever assembly 11 of the present embodiment can separate the input stage gear 221 and the output stage gear 222. As shown in fig. 9, the first trip lever assembly 11 includes a first trip lever body 111 and a fourth elastic member 112, the fourth elastic member 112 is a spring, one end of the fourth elastic member 112 is connected to the housing 1, and the other end can be in contact with the first trip lever body 111, the first trip lever body 111 can force the input stage gear 221 and the output stage gear 222 to be separated, and the fourth elastic member 112 can restore the first trip lever body 111 to connect the input stage gear 221 and the output stage gear 222. Of course, in other embodiments of the present invention, the first clutch lever assembly 11 may disconnect the transmission connection between the reduction gear set 22 and the compound gear set 31, or the reduction gear set 22 includes a plurality of reduction gears, and the clutch lever assembly 8 disconnects the transmission connection between two of the reduction gears, specifically according to the specific structure of the ejection device and the actual requirement of the user.

Further, as shown in fig. 9, the first clutch lever body 111 includes a first handspike 1111, a transition section 1112, a separating section 1113 and two guiding studs 1114, the first handspike 1111 is fixedly connected to the transition section 1112, the two guiding studs 1114 are fixedly connected to the first handspike 1111 and the transition section 1112, the fourth elastic member 112 is sleeved on the guiding studs 1114, the transition section 1112 and the separating section 1113 are smoothly connected, and the thickness of the transition section 1112 is smaller than that of the separating section 1113. When the first clutch lever body 111 pushes the transition section 1112 and the separation section 1113 to move toward the clutch gear set, the separation section 1113 moves below the output stage gear 222 and is sandwiched between the input stage gear 221 and the output stage gear 222, so that the output stage gear 222 moves toward the direction away from the input stage gear 221, thereby separating the input stage gear 221 and the output stage gear 222, at this time, the knock-out lever 4 is manually pushed to reset, so that the refrigerator door can be manually closed, the first clutch lever body 111 resets under the elastic force of the fourth elastic member 112, and the input stage gear 221 and the output stage gear 222 are connected under the action of the third elastic member 23.

EXAMPLE III

The present embodiment is different from the first embodiment in that the ejection device of the present embodiment does not include the reset assembly 8 but includes the second clutch lever assembly 12, and as shown in fig. 10 to 13, the second clutch lever assembly 12 can disconnect the transmission connection between the worm 91 and the worm wheel assembly 92. When a special condition such as sudden power failure occurs, the ejector rod 4 stops at the middle position and cannot be reset, and the closing of the refrigerator door is affected, the ejector device of the present embodiment and the ejector devices of the first and second embodiments can retract the ejector rod 4 into the housing 1.

Specifically, as shown in fig. 10 and 11, the second clutch lever assembly 12 of the present embodiment includes a second clutch lever body 121 and a fifth elastic member 122, the fifth elastic member 122 is a spring, and one end of the fifth elastic member 122 is connected to the housing 1, and the other end of the fifth elastic member abuts against the second clutch lever body 121, the second clutch lever assembly can force the transmission connection between the worm 91 and the worm wheel assembly 92 to be disconnected, and the fifth elastic member 122 can reset the second clutch lever body 121 to drivingly connect the worm 91 and the worm wheel assembly 92.

Further, as shown in fig. 10 and 11, the second clutch lever body 121 of the embodiment includes a second pushing rod 1211 and a limiting post 1212, the second pushing rod 1211 can slide relative to the housing 1, the limiting post 1212 is fixedly connected to the second pushing rod 1211, and the fifth elastic element 122 is a spring and is sleeved on the limiting post 1212.

As shown in fig. 11 and 12, the second clutch lever assembly 12 of the present embodiment further includes a fitting member 123, the lower housing is provided with a guide protrusion 103, and the fitting member 123 is interposed between the second push rod 1211 of the second clutch lever body 121 and the guide protrusion 103. The fitting member 123 is provided with a first slope, the second push rod 1211 is provided with a second slope corresponding to the first slope, when the second push rod 1211 is pushed, the fitting member 123 moves towards the direction close to the worm wheel assembly 92 and pushes the worm wheel assembly 92 to be separated from the worm 91, so that the transmission connection between the worm 91 and the worm wheel assembly 92 is disconnected, but the worm wheel assembly 92 and the input stage gear 221 are still in a meshed state.

In order to reset the worm gear assembly 92, as shown in fig. 11, the second clutch lever assembly of this embodiment further includes a sliding member 124 and a sixth elastic member 125, the housing 1 on the upper portion is provided with a mounting protrusion 101, a mounting groove is defined in the mounting protrusion 101, the sixth elastic member 125 is a spring, is located in the mounting groove and is clamped between the housing 1 and the sliding member 124, the mounting groove is provided with a sliding rail 102, the sliding member 124 is provided with a sliding groove corresponding to the sliding rail 102, the sliding member 124 can slide in the mounting groove, and in order to prevent the sliding member 124 from being separated from the mounting protrusion 101, the sliding member 124 is further provided with a.

It should be noted that the engaging element 123, the worm gear assembly 92 and the sliding element 124 are all mounted on a mounting shaft (not shown in the drawings) to ensure that the engaging element 123, the worm gear assembly 92 and the sliding element 124 can move along the axial direction of the mounting shaft, and the sixth elastic element 125 is sleeved on the mounting shaft. In a natural state, the sliding member 124 protrudes out of the mounting protrusion 101 and has a gap with the worm wheel assembly 92, when the second hand push rod 1211 is pushed, the worm wheel assembly 92 abuts against the sliding member 124, the sixth elastic member 125 is compressed, the worm 91 and the worm wheel assembly 92 are disconnected in transmission, at this time, the ejector rod 4 is manually pushed to reset, the refrigerator door can be manually closed, then the second hand push rod 1211 is released, the fifth elastic member 122 can reset the second hand push rod 1211, and the sixth elastic member 125 pushes the sliding member 124, the worm wheel assembly 92 and the mating member 123 to reset.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (14)

1. The ejection device is characterized by comprising a shell (1), a power assembly (2), a transmission assembly (3) and an ejection rod (4), wherein the ejection rod (4) is slidably mounted on the shell (1), the transmission assembly (3) is positioned in the shell (1) and is in transmission connection with the power assembly (2), the transmission assembly (3) comprises a composite gear set (31), a first rack (32) and a second rack (33), the first rack (32) and the second rack (33) are both fixedly connected with the ejection rod (4), the composite gear set (31) comprises a first gear (311) and a second gear (312) which are coaxially arranged and fixedly connected, the first gear (311) can be meshed with the first rack (32), and the second gear (312) can be meshed with the second rack (33), the diameter of a first pitch circle of the first gear (311) is smaller than the diameter of a second pitch circle of the second gear (312);

the power assembly (2) can drive the first gear (311) and the first rack (32) to be meshed so as to drive the ejection rod (4) to extend out of the shell (1), and can also drive the second gear (312) and the second rack (33) to be meshed so as to drive the ejection rod (4) to continue to extend out of the shell (1) when the first gear (311) and the first rack (32) are disengaged.

2. The ejection device according to claim 1, characterized in that the first gear (311) is provided with a first notch (3110) and the second gear (312) is provided with a second notch (3120), the ejection device further comprises a first elastic member (5), one end of the first elastic member (5) is connected to the housing (1) and the other end is connected to the ejection rod (4), when the first elastic member (5) resets the ejection rod (4), the first rack (32) can slide through the first notch (3110) and is not engaged with the first gear (311), and the second rack (33) can slide through the second notch (3120) and is not engaged with the second gear (312).

3. The ejection device according to claim 2, further comprising a circuit board (61), a position switch (62), and a position striker (7), wherein the position switch (62) is mounted on the circuit board (61), the circuit board (61) is mounted on the housing (1), the position switch (62) is electrically connected to the power assembly (2), the position striker (7) is provided on the compound gear set (31), and the position striker (7) can touch the position switch (62) to turn off the power assembly (2) when the second gear (312) is disengaged from the second rack (33).

4. Ejection device according to claim 1, characterized in that the length of said first rack (32) is smaller than the length of said second rack (33).

5. Ejection device according to claim 1, characterized in that the module of the first gear (311) is greater than the module of the second gear (312).

6. The ejection device according to any one of claims 1 to 5, characterized in that it further comprises a reset assembly (8), said reset assembly (8) being provided on said casing (1), said reset assembly (8) being capable of pushing said first gear (311) to rotate in a direction to drive said ejection rod (4) to extend out of said casing (1).

7. The ejection device according to claim 6, wherein the reset assembly (8) includes a push rod (81) and a second elastic member (82), one end of the second elastic member (82) is connected to the housing (1), the other end of the second elastic member is connected to the push rod (81), the push rod (81) can push the first gear (311) to rotate in a direction to drive the ejection rod (4) to extend out of the housing (1), and the second elastic member (82) can reset the push rod (81) to separate the push rod (81) from the first gear (311).

8. The ejection device according to any one of claims 1 to 5, characterized in that the power assembly (2) comprises a motor (21), a reduction gear set (22), a worm (91) and a worm gear assembly (92), the worm (91) is arranged at the output end of the motor (21), the worm gear assembly (92) is respectively capable of meshing with the worm (91) and the reduction gear set (22), and the reduction gear set (22) is in transmission connection with the compound gear set (31).

9. Ejection device according to claim 8, characterized in that said reduction gear set (22) is a one-way reduction gear set comprising an input stage gear (221) and an output stage gear (222), said input stage gear (221) being able to bring said output stage gear (222) in rotation, said output stage gear (222) being in mesh with said compound gear set (31).

10. The ejection device according to claim 9, wherein the compound gear set (31) further comprises a third gear (313), the third gear (313) is in transmission connection with the power assembly (2), the third gear (313) is integrally formed with the second gear (312), a third meshing tooth of the third gear (313) and a second meshing tooth of the second gear (312) are integrally formed as a compound tooth, the compound tooth extends along an axial direction of the third gear (313), and the compound tooth is meshed with the output stage gear (222) when the first gear (311) is meshed with the first rack (32).

11. The ejection device according to claim 9, further comprising a clutch lever assembly provided on the housing (1) and capable of disconnecting the power assembly (2) from the transmission assembly (3).

12. Ejection device according to claim 11, characterized in that said clutch-lever assembly comprises a first clutch-lever assembly (11), said first clutch-lever assembly (11) comprising a first clutch-lever body (111) and a fourth elastic member (112) connected at one end to said casing (1) and in abutment at the other end with said first clutch-lever body (111), said first clutch-lever body (111) being able to force the disconnection of the transmission of said input stage gear (221) and said output stage gear (222), said fourth elastic member (112) being able to reset said first clutch-lever body (111) to drivingly connect said input stage gear (221) and said output stage gear (222).

13. The ejection device according to claim 8, characterized in that it further comprises a second clutch lever assembly comprising a second clutch lever body (121) and a fifth elastic member (122), one end of the fifth elastic member (122) being connected with the casing (1) and the other end abutting against the second clutch lever body (121), the second clutch lever assembly being capable of forcing the drive connection of the worm (91) and the worm wheel assembly (92) to be disconnected, the fifth elastic member (122) being capable of resetting the second clutch lever body (121) to drive the worm (91) and the worm wheel assembly (92).

14. A refrigerator comprising a cabinet, a door rotatably attached to the cabinet, and an ejector device according to any one of claims 1 to 13 disposed on the cabinet, wherein the ejector rod (4) is capable of abutting against the door.

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