CN212299629U

CN212299629U - A kind of refrigerator

Info

Publication number: CN212299629U
Application number: CN202020009732.8U
Authority: CN
Inventors: 张树栋; 李利云; 鲍雨锋
Original assignee: Hisense Shandong Refrigerator Co Ltd
Current assignee: Hisense Shandong Refrigerator Co Ltd
Priority date: 2020-01-03
Filing date: 2020-01-03
Publication date: 2021-01-05
Anticipated expiration: 2030-01-03

Abstract

The utility model discloses a refrigerator relates to refrigeration technology field. The problem of current refrigerator door body when meeting the in-process of opening automatically and hinder, because drive assembly can not in time stop, cause drive assembly or actuating mechanism's instantaneous moment of torsion too big to lead to drive assembly or actuating mechanism impaired technical problem easily is solved simultaneously, has also solved the in-process of current refrigerator door body automatic opening simultaneously, because the push rod is in the extension state all the time, and leads to the easy impaired technical problem of push rod. The utility model discloses a refrigerator, which comprises a driving component, an ejection mechanism, a rotating mechanism and a clutch; the clutch is provided with end face teeth, and when the input torque of the clutch is larger than the rated torque, the clutch can be automatically disconnected; the ejection mechanism comprises a push rod, an incomplete gear and a reset piece; the incomplete gear is intermittently meshed with the push rod, and when the push rod is in the extension position, the incomplete gear is not meshed with the push rod, and the reset piece can reset the push rod. The utility model discloses can be used to improve the performance of refrigerator.

Description

A kind of refrigerator

Technical Field

The utility model relates to a refrigeration technology field especially relates to a refrigerator.

Background

Referring to fig. 1, the conventional door opening and closing device comprises a driving motor (not shown) connected with a control unit, a driving wheel 03 mounted on an output shaft of the driving motor, and a driven wheel 05 engaged with the driving wheel 03, wherein the driven wheel 05 is engaged with engaging teeth 06 arranged in the circumferential direction of a hinge shaft (used for rotatably connecting a door body 02 and a box body 01), a push rod 04 is arranged on the box body 01, and transmission teeth 07 engaged with the driving wheel 03 are arranged on the push rod 04.

The specific process of opening the door body 02 is as follows: the control unit controls an output shaft of the driving motor to rotate along a first rotating direction, the driving wheel 03 is driven to rotate, the push rod 04 is further driven to move towards the door body 02, the door body 02 is pushed open, meanwhile, the driving wheel 03 also drives the driven wheel 05 to rotate along the opposite direction, the driven wheel 05 rotates under the action of the meshed teeth 06 acting on the hinged shaft, the door body 02 is driven to rotate around the hinged shaft, and finally the door body 02 is opened. The specific process of closing the door body 02 is as follows: the control unit controls the output shaft of the driving motor to rotate along a second rotating direction, so as to drive the driving wheel 03 to rotate, further drive the push rod 04 to move towards the direction away from the door body 02, meanwhile, the driving wheel 03 also drives the driven wheel 05 to rotate along the opposite direction, so as to drive the door body 02 to rotate around the hinge shaft, so as to close the door body 02, wherein the first rotating direction is opposite to the second rotating direction.

In the door opening and closing device shown in fig. 1, when the control unit controls the driving motor to rotate, in the process that the driving wheel 03 drives the push rod 04 to move to push the door body, the driving wheel 03 also drives the driven wheel 04 to rotate so as to rotate the door body 02, so that after the push rod 04 reaches the extended position, the door body 02 needs to be opened continuously, so that the driving wheel 03 still needs to rotate continuously, and this structure has two problems: firstly, in the process that the driving wheel 03 drives the door body 02 to continue rotating, if the door body 02 is suddenly blocked, the driving motor cannot be stopped in time, so that the driving motor, the driving wheel 03 or the driven wheel 05 are easily damaged; secondly, because the whole process from the time the refrigerator door body 02 is jacked open to the time the door is automatically closed, the push rod 04 is always in the extension state, and at the moment, if the user suddenly closes the door with force, the push rod 04 can be damaged.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a refrigerator has solved current refrigerator door body and has met when hindering at the automatic in-process of opening, because drive assembly can not in time stop, causes drive assembly or actuating mechanism's instantaneous moment of torsion too big to lead to drive assembly or actuating mechanism impaired technical problem easily, also solved the automatic in-process of opening of current refrigerator door body simultaneously, because the push rod is in the extension state all the time, and lead to the easy impaired technical problem of push rod.

In order to achieve the above object, an embodiment of the present invention provides a refrigerator, including: a case having a storage chamber formed therein; the door body is hinged at the opening of the storage chamber; further comprising: a drive assembly; the ejection mechanism and the rotating mechanism are driven by the driving assembly; the ejection mechanism is used for ejecting the door body to a preset angle; the rotating mechanism is used for enabling the door body to continue to rotate after the ejection mechanism ejects the door body to open the storage chamber; the clutch is arranged between the output end of the driving assembly and the rotating mechanism; the clutch includes: the input end of the driving shaft is in transmission connection with the driving assembly, and the output end of the driving shaft is provided with first end face teeth; the driven shaft is coaxially arranged with the driving shaft, the input end of the driven shaft is provided with second end face teeth meshed with the first end face teeth, and the output end of the driven shaft is in transmission connection with the rotating mechanism; when the clutch is in a combined state, the first end face teeth and the second end face teeth are meshed with each other; when the input torque of the clutch is larger than the rated torque, the first end face teeth and the second end face teeth are automatically separated; the ejection mechanism includes: the push rod is arranged in the mounting seat and can slide between a contraction position and an extension position, the sliding direction of the push rod is parallel to the thickness direction of the door body, and the push rod is provided with transmission teeth arranged along the extension direction of the push rod; the incomplete gear is in transmission connection with the driving assembly and is intermittently meshed with the push rod, and when the push rod is located at the extension position, the incomplete gear is not meshed with the push rod any more; the resetting piece is arranged in the mounting seat and is used for resetting the push rod when the push rod reaches the extension position.

The embodiment of the utility model provides a refrigerator, including drive assembly and through drive assembly driven ejection mechanism and rotary mechanism, ejection mechanism is used for pushing open the door body to preset angle; the rotating mechanism is used for enabling the door body to continuously rotate to open the storage chamber after the door body is ejected by the ejection mechanism; a clutch is arranged between the output end of the driving assembly and the rotating mechanism, the clutch comprises a driving shaft and a driven shaft which is coaxial with the driving shaft, and the output end of the driving shaft is provided with first end face teeth as the input end of the driving shaft is in transmission connection with the driving assembly; the input end of the driven shaft is provided with second end face teeth meshed with the first end face teeth, and the output end of the driven shaft is in transmission connection with the rotating mechanism; when the clutch is in a combined state, the first end face teeth and the second end face teeth are meshed with each other, so that when the clutch is in the combined state, the driving shaft can drive the driven shaft and the rotating mechanism to rotate, and the clutch transmits the torque of the driving assembly to the rotating mechanism; when the input torque of the clutch is larger than the rated torque, the first end face teeth and the second end face teeth are automatically separated, so that when the refrigerator door body is blocked in the automatic opening process, the instantaneous input torque of the clutch is larger than the rated torque, the first end face teeth and the second end face teeth can be automatically separated, the driving shaft is disconnected from the driven shaft, the driven shaft and the rotating mechanism located behind the driven shaft stop running, and the torque of the driving assembly is not transmitted to the rotating mechanism any more, so that the driving assembly and the rotating mechanism can be protected from being damaged. The ejection mechanism adopts an incomplete gear structure, the push rod is provided with transmission teeth arranged along the extension direction of the push rod, the incomplete gear is intermittently meshed with the push rod, the driving assembly is in transmission connection with the incomplete gear, the sliding direction of the push rod is parallel to the thickness direction of the door body, and the incomplete gear is intermittently meshed with the push rod, therefore, the incomplete gear can drive the push rod to slide from the contraction position to the extension position, when the push rod is at the extension position, the door body can be jacked open, after the push rod reaches the extension position, the incomplete gear continues to rotate and is not meshed with the push rod any more, and meanwhile, the push rod is reset by the reset piece. Therefore, the push rod is immediately retracted into the mounting seat after the door body is jacked open, so that the push rod is always positioned in the mounting seat during the subsequent door opening and closing processes, and the push rod is not easily damaged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, 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 these drawings without creative efforts.

Fig. 1 is a schematic structural view of a door opening and closing apparatus of a related art refrigerator;

fig. 2 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention;

fig. 3 is a schematic view of the installation appearance of the driving motor, the ejection mechanism and the installation seat in the refrigerator according to the embodiment of the present invention;

fig. 4 is an installation schematic diagram of a driving motor, an ejection mechanism and a rotating mechanism in the refrigerator according to the embodiment of the present invention;

fig. 5 is a schematic connection diagram of a first steering mechanism, a first decelerating mechanism and an ejecting mechanism in a refrigerator according to the present invention;

FIG. 6 is a schematic structural view of a clutch in a refrigerator according to an embodiment of the present invention;

fig. 7 is an exploded schematic view of a clutch in a refrigerator according to an embodiment of the present invention;

FIG. 8 is a state diagram of the refrigerator according to the present invention when the clutch is powered off;

fig. 9 is a schematic structural view of first end face teeth and second end face teeth in a refrigerator according to an embodiment of the present invention;

fig. 10 is a schematic structural view of an ejection mechanism in a refrigerator according to an embodiment of the present invention;

fig. 11 is a diagram illustrating a state that a push rod is about to be ejected in a refrigerator according to an embodiment of the present invention;

fig. 12 is a state diagram of the refrigerator according to the embodiment of the present invention when the push rod is ejected;

fig. 13 is a state diagram of the refrigerator according to the embodiment of the present invention when the push rod is reset;

fig. 14 is a state diagram of the refrigerator according to the embodiment of the present invention, in which the incomplete gear is about to be engaged with the push rod again;

fig. 15 is a schematic structural view of a second steering mechanism in the refrigerator according to the embodiment of the present invention;

fig. 16 is a schematic structural view of a rotating mechanism in a refrigerator according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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 is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

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; the specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

Referring to fig. 2 to 10, an embodiment of the present invention provides a refrigerator, including a refrigerator body 1 and a door body 2, wherein a storage chamber is formed inside the refrigerator body 1, the door body 2 is hinged at an opening of the storage chamber through a hinge shaft 4 and a hinge plate 5, the refrigerator further includes a driving assembly, and an ejection mechanism 33 and a rotation mechanism 36 which are driven by the driving assembly; the ejection mechanism 33 is used for ejecting the door body 2 to a preset angle; the rotating mechanism 36 is used for enabling the door body 2 to continue to rotate to open the storage chamber after the ejection mechanism 33 ejects the door body 2; a clutch 34 is further arranged between the output end of the driving assembly and the rotating mechanism 36, the clutch 34 comprises a driving shaft 341 and a driven shaft 343 coaxially arranged with the driving shaft 341, the input end of the driving shaft 341 is in transmission connection with the driving assembly, and the output end of the driving shaft 341 is provided with first end face teeth 342; the input end of the driven shaft 343 is provided with second end face teeth 344 meshed with the first end face teeth 342, and the output end of the driven shaft 343 is in transmission connection with the rotating mechanism 36; when the clutch 34 is in the engaged state, the first and second

end face teeth

342, 344 are engaged with each other; the driving shaft 341 can drive the driven shaft 343 to rotate and transmit torque; the first face teeth 342 are automatically disengaged from the second face teeth 344 when the input torque of the clutch 34 is greater than the rated torque. The ejection mechanism 33 includes a push rod 332 disposed in a mounting seat 392, a partial gear 331, and a reset member 336. The incomplete gear 331 is in transmission connection with the driving component, one or more teeth are arranged on the incomplete gear 331 to form a meshing part, and the plurality of teeth are continuously arranged and only occupy a part, such as one third, of the circumference of the gear; the push rod 332 can slide between a contraction position and an extension position, the sliding direction of the push rod 332 is parallel to the thickness direction of the door body 2, the push rod 332 is provided with a transmission gear 334 arranged along the extension direction of the push rod, the incomplete gear 331 is intermittently meshed with the push rod 332, and when the push rod 332 is at the extension position, the meshing part of the incomplete gear 331 is not meshed with the push rod 332 any more; the reset 336 is used to reset the push rod 332 when the push rod 332 reaches the extended position.

In the refrigerator provided by the embodiment of the present invention, the clutch 34 is disposed between the output end of the driving assembly and the rotating mechanism 36, the clutch includes the driving shaft 341 and the driven shaft 343 coaxially disposed with the driving shaft 341, and the output end of the driving shaft 341 is provided with the first end face teeth 342 because the input end of the driving shaft 341 is in transmission connection with the driving assembly; the input end of the driven shaft 343 is provided with second end face teeth 344 meshed with the first end face teeth 342, and the output end of the driven shaft 343 is in transmission connection with the rotating mechanism 36; therefore, when the clutch 34 is in a combined state, the first end face teeth 342 are engaged with the second end face teeth 344, and the driving shaft 341 can drive the driven shaft 343 to rotate; because the first end face teeth 342 and the second end face teeth 344 are automatically disengaged when the input torque of the clutch 34 is greater than the rated torque, when the refrigerator door body encounters resistance in the process of automatically opening, so that the instantaneous input torque of the clutch 34 is greater than the rated torque, the first end face teeth 342 and the second end face teeth 344 are automatically disengaged, and the driven shaft 343 and the rotating mechanism 36 located behind the driven shaft 343 are stopped from running, thereby protecting the driving assembly and the rotating mechanism from being damaged. The embodiment of the utility model provides an ejection mechanism of refrigerator adopts incomplete gear mechanism, the driving gear 334 that sets up along its extending direction has on the push rod 332, incomplete gear 331 and push rod 332 intermittent type meshing, drive assembly is connected with the transmission of incomplete gear 331, because the slip direction of push rod 332 is on a parallel with the thickness direction of the door body 2, and incomplete gear 331 and push rod 332 intermittent type meshing, therefore, incomplete gear 331 can drive push rod 332 and slide to the extension position by the contraction position, when push rod 332 is in the extension position, can open door body 2, after push rod 332 reachs the extension position, incomplete gear 331 continues to rotate, and no longer mesh with push rod 332, and simultaneously, piece 336 resets push rod 332. Therefore, after the door body 2 is pushed open, the push rod 332 is immediately retracted into the mounting seat 392, so that the push rod 332 is always positioned in the mounting seat 392 in the subsequent processes of opening and closing the door and is not easily damaged.

Referring to fig. 6, 7 and 8, in order to make the structure of the clutch 34 simpler and respond faster, the clutch 34 may be an electromagnetic clutch, and the clutch includes an electromagnet 345 disposed on the driving shaft 341 and an elastic member 346 for pushing the driven shaft 343 to slide in the axial direction, so that the driven shaft 343 is disconnected from the driving shaft 341. After the electromagnet 345 is powered on, the driven shaft 343 overcomes the elastic force of the elastic member 346 and is coupled to the driving shaft 341 by the electromagnetic force of the electromagnet 345, and specifically, the electromagnet 345 includes a coil and an armature.

In order to increase the contact area and make the transmission more stable, both the driving shaft 341 and the driven shaft 343 may be stepped shafts, wherein the radial size of the output end of the driving shaft 341 is greater than that of the input end thereof, the radial size of the input end of the driven shaft 343 is greater than that of the output end thereof, and the radial size of the output end of the driving shaft 341 is equal to that of the input end of the driven shaft 343; the electromagnet 345 may be mounted on the driving shaft 341 and disposed adjacent to the driven shaft 343.

Because the driven shaft 343 needs to move along the axial in order to combine or break off with the driving shaft 341, and because pass through the face tooth meshing between driven shaft 343 and the driving shaft 341, consequently, the moving trajectory of driving shaft 341 must be accurate, in order to guarantee that the driven shaft 343 can accurately mesh with the driving shaft 341 when moving to the combination position, so clutch 34 can also include guiding axle 347, driving shaft 341 and driven shaft 343 are the hollow shaft, both are the suit on guiding axle 347, both internal holes all match with the external diameter of driven shaft 343, and the driven shaft 343 can be followed the axial slip of guiding axle 347, like this, can guarantee that the driven shaft 343 can accurately mesh with the driving shaft 341 when moving to the combination position, improve driven stability.

The elastic member 346 may be a plate spring or a spring, and in order to save cost and facilitate installation, the elastic member 346 may be a spring, and a first receiving cavity 348 for receiving a first spring is formed between the inner hole of the driving shaft 341 and the guide shaft 347; the first spring is sleeved on the guide shaft 347, one end of the first spring is pressed against the inner wall of the first accommodating cavity 348, the other end of the first spring is pressed against the driven shaft 343 after extending out of the first accommodating cavity 348, and when the driving shaft 341 is combined with the driven shaft 343, the first spring is located in the first accommodating cavity 348.

The tooth shapes of the first end face teeth 342 and the second end face teeth 344 have various realizable structures, such as triangular teeth, trapezoidal teeth, rectangular teeth and the like; for example, referring to fig. 9, in the embodiment of the present invention, the first end face tooth 342 and the second end face tooth 344 of the clutch may both adopt trapezoidal teeth, the trapezoidal teeth refer to that the cross section of the teeth is similar to trapezoidal, the number of teeth of the trapezoidal teeth may be 32, the tooth height is 0.5mm, the pressure angle is 30 °, in order to facilitate tooth release, the tooth top of the trapezoidal teeth may also be provided with a fillet R, and the size of R may be set to a suitable value as required. The tooth profile parameters can increase the rated torque of the clutch from 1.5N.m to 10N.m compared with a friction plate type clutch under the condition that the same electromagnet is adopted, and when the rated torque is more than 10N.m, the first end face teeth 342 and the second end face teeth 344 can be automatically separated, so that the use safety of the refrigerator can be improved.

Referring to fig. 11 to 14, the reset member 336 has various realizable structures, for example, the reset member 336 may be an elastic rubber band or a spring, and the second spring is preferred for the reset member 336 because the elastic rubber band has a short service life, frequent installation is inconvenient, and the spring has a long service life. The extension and contraction direction of the second spring is the same as the sliding direction of the push rod 332, one end of the second spring is connected with the push rod 332, and the other end of the second spring is connected with the mounting seat 392.

The second spring has various mounting manners, for example, one end of the second spring can be connected to the end face of the push rod 332, and the other end of the second spring can be connected to the side wall of the mounting seat 392, which has the disadvantages that the distance between the push rod 332 and the side wall of the mounting seat 392 needs to be larger than the free height of the second spring, the structure is not compact enough, and the occupied space is large; as another example, referring to fig. 11, a wall surface of the mounting seat 392 may form a protrusion 337, the protrusion 337 is located on a sliding track of the push rod 332, a receiving cavity for receiving a second spring is formed in the push rod 332, one end of the second spring is connected to an inner wall of the receiving cavity, and the other end of the second spring extends out of the receiving cavity and is connected to the protrusion 337; when the push rod 332 is in the retracted position, the second spring and the protrusion 337 are located in the receiving cavity. The structure has the advantages that: the second spring and the protrusion 337 do not additionally occupy the inner space of the mounting seat 392, and the distance between the push rod 332 and the side wall of the mounting seat 392 is not limited, so that the structure is more compact, and therefore, the latter is preferred.

In order to obtain a suitable transmission ratio, the driving assembly may include a driving motor 31 and a transmission mechanism disposed on an output shaft of the driving motor 31, for example, the transmission mechanism may be a chain transmission, which has the disadvantages of loose structure and poor transmission stability; further, for example, the transmission mechanism may also be a gear transmission, the driving assembly includes a driving motor 31 and a transmission gear 333 disposed at an output end of the driving motor 31, the transmission gear 333 is in transmission connection with the incomplete gear 331, and specifically, the transmission gear 333 and the incomplete gear 331 may be fixed on the same transmission shaft.

Referring to fig. 5 and 10, the incomplete gear 331 and the transmission gear 333 may be an integral piece or a separate piece, and if the incomplete gear 331 and the transmission gear 333 are separate pieces, the incomplete gear 331 and the transmission gear 333 need to be disassembled and assembled respectively during disassembly and assembly, which is inconvenient to disassemble and assemble, loose in structure and large in occupied space; if the incomplete gear 331 and the transmission gear 333 are an integral piece, the assembly and disassembly are convenient, the structure is compact, and the occupied space is small.

Because the push rod 332 is pulled to be reset by the second spring, the inertia of the push rod 332 during resetting is relatively large, and in order to prevent the push rod 332 from directly colliding with the mounting seat 392 and causing the push rod 332 or the mounting seat 392 to be damaged, for example, referring to fig. 10 and 11, the first limiting member 335 may be disposed on the outer side surface of the push rod 332, and the second limiting member 338 may be correspondingly disposed on the side wall of the mounting seat 392, so that at the moment of resetting of the push rod 332, the first limiting member 335 and the second limiting member 338 are in contact first, and the push rod 332 does not collide with the mounting seat 392, and the push rod 332 or the mounting seat 392 can be prevented from being damaged.

Referring to fig. 11 to 14, when the push rod 332 extends, under the driving of the driving motor 31, as the incomplete gear 331 continuously rotates in the clockwise direction, the incomplete gear 331 may disengage from the driving tooth at the extreme end of the push rod 332, the second spring changes from the extended state to the free state, and pulls the push rod 332 to reset, since the incomplete gear 331 has disengaged from the driving tooth on the push rod 332, the incomplete gear 331 may continue to rotate in the clockwise direction, but is difficult to rotate in the counterclockwise direction, therefore, the first limiting member 335 and the second limiting member 338 may be elastic limiting members, when the first limiting member 335 moves synchronously with the push rod 332 and the first limiting member 335 abuts against the second limiting member 338, if the incomplete gear 331 has a tendency to rotate in the counterclockwise direction, the push rod 332 may be pushed toward the incomplete gear 331 by the elastic force of the two limiting members, this ensures that the incomplete gear 331 is engaged with the driving gear 334 of the push rod 332, and further ensures that the incomplete gear 331 rotates counterclockwise to drive the push rod 332 to move smoothly. Therefore, the first limiting member 335 and the second limiting member 338 not only limit the movement of the push rod 332, but also ensure the continuity of the movement of the entire push rod 332 and the incomplete gear 331.

The mounting seat 392 can be installed at various positions, for example, the mounting seat 392 can be installed at the outer side of the top of the case 1; for another example, referring to fig. 2 and 4, an installation cavity may be disposed at the top of the door body 2, and the installation seat 392 is installed in the installation cavity; if the mounting seat 392 is mounted on the outer side of the top of the refrigerator body 1, the mounting seat 392 protrudes out of the top of the refrigerator body 1, so that the top of the refrigerator is uneven, the attractiveness of the refrigerator is affected, and articles are inconvenient to place on the top of the refrigerator; if the installation seat 392 is installed in the installation cavity at the top of the door body 2, the installation seat 392 is not higher than the height of the door body 2, so that after the door body 2 is closed, the installation seat 392 cannot be exposed, the top of the refrigerator is flat, the attractiveness of the refrigerator cannot be influenced, and articles can be conveniently placed on the top of the refrigerator. In order to prevent sundries from falling into the mounting seat 392, and to make the appearance more beautiful, the upper part of the mounting seat 392 is provided with an upper cover 391 which is mutually buckled with the mounting seat 392, the upper end of the hinge shaft 4 extends out of the upper cover 391 and is connected with the hinge plate 5, the output shaft of the driving motor 31 is positioned in the mounting seat 392, the main body part of the driving motor 31 is positioned outside the mounting seat 392, and in order to prevent the driving motor 31 from being knocked, the outside of the driving motor 31 is provided with a motor cover 311.

Referring to fig. 16, rotation mechanism 36 includes a second driven gear 361, hinge shaft 4 has engagement teeth 362 provided along a circumferential direction thereof and engaged with second driven gear 361, and rotation mechanism 36 converts rotation of drive motor 31 into rotation of hinge shaft 4.

Because the rotation speed of the driving motor 31 is generally high, and if the opening speed of the door 2 is too fast, the inertia thereof is large, when the door 2 is blocked in the rotation process, the door 2 cannot stop rotating in time, the door 2 or the driving motor 31 is easily damaged, and in addition, if a user accidentally hits the door 2 which is being opened quickly, the user is also easily damaged, in order to enable the ejection mechanism 33 to eject the door 2 within a preset time period and enable the rotating mechanism 36 to completely open the door 2 within another preset time period, the first speed reduction mechanism 32 may be arranged between the output end of the driving motor 31 and the driving shaft 341 of the clutch 34, and the second speed reduction mechanism 35 may be arranged between the driven shaft 343 of the clutch 34 and the rotating mechanism 36. The second speed reducing mechanism 35 can further reduce the rotation speed of the driving motor 31 after the door body 2 is ejected by the ejection mechanism 33, and then the rotating mechanism 36 drives the door body 2 to be slowly opened, so that the door body 2 or the driving motor 31 is not easily damaged, and the safety of the refrigerator can be improved. The second reduction mechanism 35 can increase the torque and transmit the increased torque to the rotation mechanism 36, thereby reducing the performance requirement for the rotation mechanism 36. The second reduction mechanism 35 may be a reduction gear set.

The ejection mechanism 33 can eject the door body 2 to a preset position within a preset time by controlling the reduction ratio of the first reduction mechanism 32, and the rotating mechanism 36 can fully open the door body 2 within another preset time period by controlling the reduction ratio of the second reduction mechanism 35. For example, the ejection mechanism 33 can eject the door body 2 to 8 ° to 15 ° within 1s, and the rotation mechanism 36 can fully open the door body 2 within 4 s.

In order to achieve a smoother transmission, the first speed reduction mechanism 32 generally employs multiple speed reductions, for example, the first speed reduction mechanism 32 may include a second driving gear disposed on the driving shaft and a plurality of first driven gears disposed on different driven shafts 343, and this structure has the disadvantage that if the number of transmission stages needs to be increased, the number of the driven shafts 343 must be increased, the structure is complicated, and the occupied space is large; for another example, referring to fig. 5, the first speed reducing mechanism 32 may further include a first mounting shaft 321 connected to the output end of the driving motor 31, a first gear 322 and at least one second duplicate gear 324 both sleeved on the first mounting shaft 321, a second mounting shaft 325 arranged in parallel with the first mounting shaft 321, and at least one first duplicate gear 323 sleeved on the second mounting shaft 325. The second duplicate gear 324 can rotate relative to the first mounting shaft 321, i.e., the first mounting shaft 321 does not transmit torque. The first dual gear 323 is able to rotate relative to the second mounting shaft 325, i.e., the second mounting shaft 325 does not transmit torque.

Referring to fig. 5, for example, the number of the first duplicate gears 323 may be two, the number of the second duplicate gears 324 may also be two, and since the first gear 322 is fixed on the first mounting shaft 321, the first duplicate gear 323 may rotate relative to the second mounting shaft 325, the second duplicate gears 324 may rotate relative to the first mounting shaft 321, and both the first duplicate gears 323 and the second duplicate gears 324 have different sizes, when the driving motor 31 drives the first mounting shaft 321 to rotate, the first gear 322 may drive the large gear of one of the first duplicate gears 323 to rotate, so as to implement a first reduction, and at the same time, the small gear of the first duplicate gear 323 may drive the large gear of one of the second duplicate gears 324 to rotate, so as to implement a second reduction, the small gear of the second duplicate gear 324 may drive the large gear of the other first duplicate gear 323, and a third-stage speed reduction is realized, the small gear in the first duplicate gear 323 drives the large gear in the other second duplicate gear 324 to rotate so as to realize a fourth-stage speed reduction, and the small gear in the other second duplicate gear 324 is meshed with the transmission gear 333, so that the increased torque is transmitted to the ejection mechanism 33 and the rotating mechanism 36. The output end of the second mounting shaft 325 is sleeved with a shaft head 327, one end of the shaft head 327 is fixedly connected with another second duplicate gear 324, the other end of the shaft head 327 is fixedly connected with an input shaft of the clutch 34, and specifically, the shaft head 327 and the driving shaft 341 can be connected through a key. The structure has the advantages that when the number of transmission stages is required to be increased, the number of the first duplicate gears 323 and the second duplicate gears 324 is increased, the number of mounting shafts is not required to be increased, the structure is simpler and more compact, and the occupied space is less.

Referring to fig. 4 and 5, in order to make the structure of the refrigerator more compact, the driving motor 31 may be disposed along the height direction of the door body 2, the first installation shaft 321 is disposed along the width direction of the door body 2, and the first steering mechanism 37 is disposed between the driving motor 31 and the first installation shaft 321, and converts the rotation of the output shaft of the driving motor 31 around the height direction of the door body 2 into the rotation of the first installation shaft 321 around the width direction of the door body 2, so that the ejection mechanism 33 can smoothly eject the door body 2; a second steering mechanism 38 may be disposed between the output end of the clutch 34 and the rotating mechanism 36, and the second steering mechanism 38 may convert the rotation of the output shaft of the clutch 34 around the width direction of the door body 2 into the rotation of the rotating mechanism 36 around the height direction of the door body 2, so that the rotating mechanism 36 may smoothly drive the door body 2 to rotate.

The first steering mechanism 37 has various structures, for example, the first steering mechanism 37 may be a bevel gear mechanism; as another example, referring to fig. 5, the first steering mechanism 37 may also employ a worm gear mechanism including a worm wheel 371 and a worm 372, the worm 372 being disposed on an output shaft of the driving motor 31, and the worm wheel 371 being disposed on an input end of the first mounting shaft 321 and meshing with the worm 372. Because the first steering mechanism 37 is directly connected with the driving motor 31, the larger the transmission ratio of the first steering mechanism 37 is, the better the transmission ratio is, compared with a bevel gear mechanism, the worm gear mechanism has the advantages of more compact structure, larger transmission ratio and more stable transmission, and in addition, because the meshing tooth surfaces of two wheels in the worm gear mechanism are in line contact, the bearing capacity of the worm gear mechanism is also greatly higher than that of the bevel gear mechanism. Therefore, a worm gear mechanism is preferable.

The second steering mechanism 38 has various structures, for example, the second steering mechanism 38 may be a worm and gear mechanism; as another example, referring to fig. 15, the second steering mechanism 38 may also adopt a bevel gear mechanism, the bevel gear mechanism includes a first bevel gear 381, a second bevel gear 382 and a transmission shaft 383, the first bevel gear 381 is disposed on the output shaft of the clutch 34, the second bevel gear 382 is engaged with the first bevel gear 381, the rotation axis of the second bevel gear 382 is perpendicular to the rotation axis of the first bevel gear 381, the transmission shaft 383 is disposed along the height direction of the door body 2, the second bevel gear 382 is mounted at the input end of the transmission shaft 383, and the output end of the transmission shaft 383 is connected to the second speed reduction mechanism 35. Compared with a worm gear mechanism, the bevel gear mechanism is higher in transmission efficiency and lower in cost. Therefore, a bevel gear mechanism is preferable.

Referring to fig. 10 and 15, after the clutch 34 is de-energized, the driven shaft 343 drives the first bevel gear 381 to move a distance in the axial direction away from the driving shaft 341, and since the distance is generally small, only a few millimeters or even less than a millimeter, and a gap generally remains between the first bevel gear 381 and the second bevel gear 382, the engagement between the first bevel gear 381 and the second bevel gear 382 is not affected by the small movement of the first bevel gear 381.

In the opening process of the door body 2, if the door body 2 is blocked but the driving motor 31 cannot stop rotating in time, the driving motor 31 or the rotating mechanism 36 is easily damaged, therefore, a potentiometer 6 which rotates synchronously with the door body 2 can be used for detecting the rotating angle of the door body 2, the rotating shaft of the potentiometer 6 is in transmission connection with a hinge shaft 4 of the door body 2, the output voltage value of the potentiometer 6 is correspondingly changed along with the change of the rotating angle of the hinge shaft 4, the control unit is configured to control the driving assembly to operate according to the output voltage value of the potentiometer 6, and if the output voltage value of the potentiometer 6 continuously changes, the normal moving state of the door body 2 is indicated, and the driving assembly continuously operates; if the output voltage value of the potentiometer 6 is unchanged, it indicates that the door body 2 is blocked in the movement process, and the driving assembly stops running. Therefore, when the door body 2 is blocked, the driving assembly can be stopped in time, and the driving assembly or the rotating mechanism 36 is effectively prevented from being damaged.

The potentiometer 6 has various available installation modes, for example, a rotating shaft of the potentiometer 6 can be directly and fixedly connected with the hinge shaft 4 or the first driven gear 351, and the structure has the disadvantages that the rotating speed of the rotating shaft of the potentiometer 6 needs to be the same as that of the hinge shaft 4 or the first driven gear 351, the rotating speed of the rotating shaft of the potentiometer 6 cannot be independently adjusted, the peak value and the valley value of the output voltage value of the potentiometer 6 are not easy to be exactly corresponding to the fully opened state and the fully closed state of the door body 2, and the condition of inaccurate detection may occur; for another example, referring to fig. 16, the rotating shaft of the potentiometer 6 may also rotate along with the mounting gear 7, the mounting gear 7 is engaged with the first driven gear 351, and the first driven gear 351 may drive the rotating shaft of the potentiometer 6 to rotate, so that the output voltage of the potentiometer 6 is changed.

The potentiometer 6 comprises three ports, namely an input end P1, an input end P2 and an output end P3, wherein the input end P1 is connected with the negative pole of a power supply, the input end P2 is connected with the positive pole of the power supply, and the output end P3 is connected with the control unit.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A refrigerator, comprising:

a case having a storage chamber formed therein;

the door body is hinged at the opening of the storage chamber; it is characterized by also comprising:

a drive assembly;

the ejection mechanism and the rotating mechanism are driven by the driving assembly;

the ejection mechanism is used for ejecting the door body to a preset angle; the rotating mechanism is used for enabling the door body to continue to rotate after the ejection mechanism ejects the door body to open the storage chamber;

the clutch is arranged between the output end of the driving assembly and the rotating mechanism; the clutch includes:

the input end of the driving shaft is in transmission connection with the driving assembly, and the output end of the driving shaft is provided with first end face teeth;

the driven shaft is coaxially arranged with the driving shaft, the input end of the driven shaft is provided with second end face teeth meshed with the first end face teeth, and the output end of the driven shaft is in transmission connection with the rotating mechanism;

when the clutch is in a combined state, the first end face teeth and the second end face teeth are meshed with each other; when the input torque of the clutch is larger than the rated torque, the first end face teeth and the second end face teeth are automatically separated;

the ejection mechanism includes:

the push rod is arranged in the mounting seat and can slide between a contraction position and an extension position, the sliding direction of the push rod is parallel to the thickness direction of the door body, and the push rod is provided with transmission teeth arranged along the extension direction of the push rod;

the incomplete gear is in transmission connection with the driving assembly and is intermittently meshed with the push rod, and when the push rod is located at the extension position, the incomplete gear is not meshed with the push rod any more;

the resetting piece is arranged in the mounting seat and is used for resetting the push rod when the push rod reaches the extension position.

2. The refrigerator according to claim 1, wherein the clutch further comprises:

the electromagnet is arranged on the driving shaft;

the elastic piece is used for pushing the driven shaft to slide along the axial direction, so that the driven shaft is disconnected with the driving shaft;

after the electromagnet is electrified, the driven shaft overcomes the elasticity of the elastic piece and is combined with the driving shaft under the driving of the electromagnetic force of the electromagnet.

3. The refrigerator as claimed in claim 2, wherein the elastic member is a first spring, the driving shaft and the driven shaft are hollow shafts, the clutch further comprises a guide shaft, and the driving shaft and the driven shaft are both fitted over the guide shaft; the driven shaft can slide along the axial direction of the guide shaft; a first accommodating cavity for accommodating the first spring is formed between the inner hole of the driving shaft and the guide shaft; the first spring suit is in on the guiding axle, just the one end top of first spring is in on the first inner wall that holds the chamber, the other end of first spring stretches out behind the first chamber that holds the top on the driven shaft, the driving shaft with when the driven shaft combines, first spring is located first holding the intracavity.

4. The refrigerator as claimed in claim 3, wherein the first end face teeth and the second end face teeth are trapezoidal teeth, the number of teeth of the trapezoidal teeth is 32, the height of the teeth is 0.5mm, the pressure angle is 30 °, and rounded corners are provided at the tips of the trapezoidal teeth.

5. The refrigerator as claimed in claim 4, wherein the restoring member is a second spring, a telescopic direction of the second spring is the same as a sliding direction of the push rod, one end of the second spring is connected to the push rod, and the other end of the spring is connected to the mounting seat.

6. The refrigerator as claimed in claim 5, wherein a protrusion is formed on an inner wall of the mounting seat, the protrusion is located on a sliding track of the push rod, a second accommodating cavity for accommodating the second spring is formed in the push rod, one end of the second spring is connected to the inner wall of the second accommodating cavity, the other end of the second spring extends out of the second accommodating cavity and is connected to the protrusion, and when the push rod is in a retracted position, the second spring and the protrusion are both located in the second accommodating cavity.

7. The refrigerator as claimed in any one of claims 1 to 6, wherein the driving assembly includes a driving motor and a transmission gear provided at an output end of the driving motor, the transmission gear being in transmission connection with the partial gear.

8. The refrigerator of claim 7, wherein the partial gear and the transmission gear are a single piece.

9. The refrigerator of claim 8, wherein the ejection mechanism further comprises:

the first limiting piece is arranged in the mounting seat and prevents the push rod from directly contacting with the mounting seat when the push rod is in a contraction position;

the second limiting part is arranged on the push rod, and when the push rod is at a contraction position, the second limiting part is in contact with the first limiting part.

10. The refrigerator according to claim 9, wherein the first and second stoppers are elastic stoppers.

11. The refrigerator according to claim 10, wherein a mounting cavity is formed in the top of the door body, and the mounting seat is located in the mounting cavity.

12. The refrigerator according to claim 11, wherein the rotation mechanism comprises:

the second driven gear is in transmission connection with the driven shaft;

and the hinge shaft of the door body is provided with meshing teeth which are arranged along the circumferential direction of the hinge shaft and are meshed with the second driven gear.

13. The refrigerator of claim 12, further comprising:

a first speed reduction mechanism provided between an output of the drive motor and the clutch;

and the second speed reducing mechanism is arranged at the output end of the clutch and is in transmission connection with the rotating mechanism.

14. The refrigerator according to claim 13, wherein the first decelerating mechanism includes:

the first mounting shaft is connected with the output end of the driving motor;

the first gear is fixedly connected to the first mounting shaft;

at least one second duplicate gear sleeved on the first mounting shaft, wherein the second duplicate gear can rotate relative to the first mounting shaft; two gears of the second duplicate gear are different in size;

the second mounting shaft is arranged in parallel with the first mounting shaft;

at least one first duplicate gear sleeved on the second mounting shaft, wherein the first duplicate gear can rotate relative to the second mounting shaft; two gears in the first duplicate gear are different in size;

the first gear is meshed with the bull gear of the first duplicate gear, and the pinion gear of the first duplicate gear is meshed with the bull gear of the second duplicate gear; the pinion of the second duplicate gear is meshed with the transmission gear, and the second duplicate gear is fixedly connected with the input end of the driving shaft.

15. The refrigerator according to claim 14, wherein the second reduction mechanism is a reduction gear set.

16. The refrigerator according to claim 15, wherein the driving motor is disposed along a height direction of the door body, and the first mounting shaft is disposed along a width direction of the door body;

the refrigerator further includes:

the first steering mechanism is arranged between the output end of the driving motor and the first mounting shaft and used for converting the rotation of the output shaft of the driving motor around the height direction of the door body into the rotation of the first mounting shaft around the width direction of the door body;

and the second steering mechanism is arranged between the output end of the driven shaft and the rotating mechanism and is used for converting the rotation of the driven shaft around the width direction of the door body into the rotation of the rotating mechanism around the height direction of the door body.

17. The refrigerator of claim 16, wherein the first steering mechanism comprises:

the worm is arranged on an output shaft of the driving motor;

and the worm wheel is arranged at the input end of the first installation shaft and meshed with the worm.

18. The refrigerator of claim 17, wherein the second steering mechanism comprises:

the first bevel gear is arranged on the driven shaft;

a second bevel gear engaged with the first bevel gear, a rotation axis of the second bevel gear being perpendicular to a rotation axis of the first bevel gear;

the transmission shaft is arranged along the height direction of the door body, the input end of the transmission shaft is connected with the second bevel gear, and the output end of the transmission shaft is connected with the second speed reducing mechanism.

19. The refrigerator of claim 18, further comprising:

the rotating shaft of the potentiometer is in transmission connection with the hinge shaft of the door body, and the output voltage value of the potentiometer correspondingly changes along with the change of the rotating angle of the hinge shaft;

a control unit configured to:

controlling the driving component to operate according to the output voltage value of the potentiometer, and if the output voltage value of the potentiometer continuously changes, the driving component continuously operates; and if the output voltage value of the potentiometer is unchanged, the driving assembly stops running.

20. The refrigerator according to claim 19, further comprising a potentiometer mounting gear, wherein the resistor body of the potentiometer is fixed, and the rotating shaft of the potentiometer rotates with the mounting gear;

the second reduction mechanism includes a first driven gear; the mounting gear is meshed with the first driven gear.