CN212057900U - A kind of refrigerator - Google Patents

Abstract

The utility model discloses a refrigerator relates to refrigeration technology field. The technical problem of the automatic in-process that opens of current refrigerator door body continuously has the noise is solved. The utility model discloses a refrigerator, which comprises a refrigerator body and a door body, wherein a storage chamber is formed in the refrigerator body, the door body is hinged at the opening of the storage chamber through a hinge shaft and a hinge plate, and the refrigerator also comprises a driving component, an ejection mechanism and a rotating mechanism; the ejection mechanism comprises a push rod arranged in the mounting seat and a grooved wheel in transmission connection with the driving assembly; the sliding direction of the push rod is parallel to the thickness direction of the door body, a plurality of guide pillars arranged along the extending direction of the push rod are arranged on the push rod, the guide pillars are perpendicular to the push rod, a plurality of radial grooves are arranged on the grooved wheel, when the grooved wheel rolls along the extending direction of the push rod, the radial grooves can be sequentially sleeved on the corresponding guide pillars, the guide pillars are stirred to move so as to drive the push rod to slide between the contraction position and the extension position, and when the push rod is located at the extension position, the guide pillars are separated from the radial grooves. 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, the driving wheel 03 drives the driven wheel 05 to rotate in the process that the driving wheel 03 drives the push rod 04 to move to jack the door body, so that the door body 02 is opened, after the push rod 04 reaches the extension position, because the door body 02 needs to be opened continuously, therefore, the driving wheel 03 still needs to rotate continuously, at this time, the driving wheel 03 and the push rod 04 are not meshed but still contacted with each other, the push rod 04 is always in the extension position, when the driving wheel 03 rotates by one tooth, the push rod 04 reciprocates once with a small amplitude, the tooth of the driving wheel 03 rubs with the transmission tooth 07 of the push rod 04 once, a noise is generated once, because the set transmission ratio is satisfied, the number of teeth of the driving wheel 03 is generally more, therefore, after the refrigerator door 02 is pushed open, the whole process is continued until the refrigerator door is completely opened, and therefore, the user experience is poor.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a refrigerator has solved the automatic in-process of opening of current refrigerator door body and has lasted the technical problem who has the noise.

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 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, the push rod is provided with a plurality of guide columns arranged along the extension direction of the push rod, and the guide columns are perpendicular to the push rod; the grooved wheel is in transmission connection with the driving assembly and is provided with a plurality of radial grooves, and when the grooved wheel rolls along the extension direction of the push rod, the plurality of radial grooves can be sequentially sleeved on the corresponding guide posts and can stir the guide posts to move so as to drive the push rod to slide between a contraction position and an extension position; when the push rod is in the extension position, the guide post at the tail end is separated from the radial groove.

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; the ejection mechanism adopts a grooved pulley guide post structure, the push rod is provided with a plurality of guide posts arranged along the extension direction of the push rod, the guide posts are perpendicular to the push rod, the grooved pulley is in transmission connection with the driving assembly, a plurality of radial grooves are correspondingly arranged on the grooved pulley, when the driving assembly drives the grooved pulley to roll along the extension direction of the push rod, the radial grooves can be sequentially sleeved on the corresponding guide posts, and the guide posts are stirred to move so as to drive the push rod to slide between a contraction position and an extension position. Therefore, the transmission ratio is not considered, the number of the radial grooves can be set as required, and the number of the radial grooves can be far less than the number of teeth of the driving wheel, so that the frequency of the radial groove opening part contacting the guide post is greatly reduced, and the noise frequency is also greatly reduced in the subsequent door opening process.

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 an ejection mechanism and a rotation mechanism of a refrigerator in the prior art;

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 an ejection mechanism in a refrigerator according to an embodiment of the present invention;

FIG. 7 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. 8 is a state diagram of the push rod being ejected out in the refrigerator according to the embodiment of the present invention;

fig. 9 is a state diagram of the push rod being ejected out in the refrigerator according to the embodiment of the present invention;

fig. 10 is a state diagram of the refrigerator according to the embodiment of the present invention when the push rod is ejected;

fig. 11 is a schematic structural view of a second steering mechanism in the refrigerator according to the embodiment of the present invention;

fig. 12 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 7, 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 3 to continue rotating after the ejection mechanism 33 ejects the door body 2 to open the storage chamber; the ejecting mechanism 33 comprises a push rod 332 arranged in the mounting seat 392 and a grooved wheel 331 in transmission connection with the driving assembly, 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 plurality of guide posts 334 arranged along the extension direction thereof, the guide posts 334 are perpendicular to the push rod 332, the grooved wheel 331 is provided with a plurality of radial grooves 335, when the grooved wheel 331 rolls along the extension direction of the push rod 332, the radial grooves 335 can be sequentially sleeved on the corresponding guide posts 334, and the guide posts 334 are shifted to move so as to drive the push rod 332 to slide between the contraction position and the extension position; with the push rod 332 in the extended position, the distal guide post 334 exits the radial slot 335. The distal guide post 334 is the last guide post to engage the radial slot 335 during extension of the push rod 332.

The refrigerator provided by the embodiment of the utility model adopts a grooved wheel guide post structure, the push rod 332 is provided with a plurality of guide posts 334 arranged along the extending direction, the guide posts 334 are mutually vertical to the push rod 332, the grooved wheel 331 is in transmission connection with the driving component, the grooved wheel 331 is correspondingly provided with a plurality of radial grooves 335, when the driving assembly drives the grooved wheel 331 to roll along the extending direction of the push rod 332, the radial grooves 335 can be sequentially sleeved on the corresponding guide posts 334, and moves the guide post 334 to slide the push rod 332 between the retracted position and the extended position, since the sliding direction of the push rod 332 is parallel to the thickness direction of the door body 2, when the push rod 332 is at the extended position, the door body 2 can be pushed open, after the push rod 332 reaches the extended position, the guide posts 334 at the ends are all out of the radial slots 335, the sheave 331 continues to rotate, when the mouth of the radial groove 335 again hits the top of the guide post 334, a noise is generated. Therefore, the transmission ratio is not considered, the number of the radial grooves 335 can be set as required, and the number of the radial grooves 335 can be far less than the number of teeth of the driving wheel, so that the frequency of the opening part of the radial grooves 335 contacting the guide post 334 is greatly reduced, and the noise frequency is also greatly reduced in the subsequent door opening process. For example, the number of radial slots 335 on the sheave 331 may be 4, and a sliding tooth is generated for each 1/4 revolutions of the sheave 331, and the noise frequency is greatly reduced.

The distance between two adjacent radial grooves 335 along the outer circumferential surface of the grooved wheel 331 is equal to the distance between two adjacent guide posts 334, so that in the process that the grooved wheel 331 drives the push rod 332 to move, the condition that two adjacent radial grooves 335 simultaneously shift the corresponding guide posts 334 occurs once every time the grooved wheel 331 rotates for one circle, and the transmission stability can be improved.

Because the inertia of the push rod 332 during extension or retraction is large, in order to prevent the push rod 332 from sliding out of the mounting seat 392 or directly colliding against the mounting seat 392, and thus the push rod 332 or the mounting seat 392 is damaged, referring to fig. 7 to 10, a first limiting member 336 and a second limiting member 338 may be disposed inside the mounting seat 392, the first limiting member 336 is close to the outer side of the mounting seat 392, and the push rod 332 is prevented from sliding out of the mounting seat 392 when in the extended position; the second limiting member 338 is located inside the mounting seat 392, and when the push rod 332 is in the retracted position, the push rod 332 is prevented from directly contacting the mounting seat 392, so that the push rod 332 or the mounting seat 392 is prevented from being damaged by impact.

The first limiting member 336 and the second limiting member 338 may both be limiting plates, the ejecting mechanism 33 may further include a third limiting member 339 disposed on a side surface of the push rod, when the push rod 332 is in the extended position, the third limiting member 339 contacts the first limiting member 336, when the push rod 332 is in the retracted position, the third limiting member 339 contacts the second limiting member 338, and the third limiting member 339 may be an elastic member. Referring to fig. 7 to 10, when the push rod 332 extends, under the driving of the driving motor 31, as the grooved wheel 331 continuously rotates in a clockwise direction, the grooved wheel 331 may disengage from a guide post at the outermost edge of the push rod 332, since the grooved wheel 331 has disengaged from the guide post on the push rod 332, the grooved wheel 331 may continuously rotate in the clockwise direction, but is difficult to rotate in a counterclockwise direction, therefore, an elastic member may be used, that is, the third limiting member 339 cooperates with the first limiting member 336 and the second limiting member 338, when the third limiting member 339 synchronously moves with the push rod 332 and the third limiting member 339 abuts against the first limiting member 336, if the grooved wheel 331 has a tendency to rotate in the counterclockwise direction, the push rod 332 may be pushed toward the grooved wheel 331 under the elastic force of the two limiting members, which ensures that the grooved wheel 331 is engaged with the guide post 334 on the push rod 332, and further ensures that when the grooved wheel 331 rotates, the push rod 332 is smoothly driven to move. Similarly, after the push rod 332 retracts, the grooved wheel 331 is hard to rotate clockwise, at this time, under the action of the third limiting member 339, the push rod 332 is pushed towards the grooved wheel 331, so that the grooved wheel 331 is ensured to be engaged with the guide post 334 at the other end of the push rod 332, and further, when the grooved wheel 331 rotates clockwise, the push rod 332 is smoothly driven to move. Therefore, the combination of the limiting plate and the elastic piece not only limits the movement of the push rod 332, but also can ensure the motion continuity of the whole push rod 332 and the grooved wheel 331.

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 transmission gear 333 is in transmission connection with the grooved wheel 331, specifically, the transmission gear 333 may be fixed on the same transmission shaft as the grooved wheel 331, and this structure has the advantages of compact structure, stable transmission and high transmission precision.

Referring to fig. 6, the grooved wheel 331 and the transmission gear 333 may be an integral piece or a separate piece, and if the grooved wheel 331 and the transmission gear 333 are separate pieces, the grooved wheel 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 grooved wheel 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.

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. 4 and 12, rotation mechanism 36 includes a second driven gear 361, and 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.

Referring to fig. 4, the output end of the driving motor 31 may also be connected to the rotating mechanism 36 through the clutch 34, that is, when the driving motor 31 drives the ejecting mechanism 33 to move, the clutch 34 is powered off, so that the rotating mechanism 36 is in a locked state, thereby avoiding damage to the rotating mechanism 36 due to a large torque at the moment of opening the door, and further improving the working stability of the refrigerator.

Because the rotation speed of the driving motor 31 is generally high, and if the opening speed of the door body 2 is too fast, the inertia thereof is large, when the door body 2 is blocked in the rotation process, the door body 2 cannot stop rotating in time, the door body 2 or the driving motor 31 is easily damaged, and in addition, if a user accidentally hits the door body 2 which is being opened quickly, the user is also easily damaged, in order to enable the ejection mechanism 33 to eject the door body 2 within a preset time period and enable the rotating mechanism 36 to completely open the door body 2 within another preset time period, a first speed reduction mechanism 32 can be arranged between the output end of the driving motor 31 and the clutch 34, and a second speed reduction mechanism 35 is arranged between the output end 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 make the transmission smoother, the first speed reduction mechanism 32 generally adopts multi-stage speed reduction, 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, and this structure has the disadvantage that if the number of transmission stages needs to be increased, the number of driven shafts must be increased, the structure is complex, 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, and the other end of the shaft head 327 is fixedly connected with the input shaft of the clutch 34. 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 may be 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. 11, 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, a rotation axis of the second bevel gear 382 is perpendicular to a rotation axis of the first bevel gear 381, the transmission shaft 383 is disposed along a height direction of the door body 2, the second bevel gear 382 is mounted at an input end of the transmission shaft 383, and an 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.

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 fixedly connected with the hinge shaft 4 or the first driven gear 351; 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 can occur; for another example, referring to fig. 12, 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 can drive the rotating shaft of the potentiometer 6 to rotate, so that the output voltage of the potentiometer 6 changes; the advantage of this structure is, the rotational speed of the pivot of potentiometer 6 can be adjusted through adjusting the drive ratio of installation gear 7 and first driven gear 351, makes the peak value and the valley value of the output voltage value of potentiometer 6 just correspond to the complete open mode and the complete closed mode of door body 2, detects more accurately.

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 (17)

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 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, the push rod is provided with a plurality of guide columns arranged along the extension direction of the push rod, and the guide columns are perpendicular to the push rod;

the grooved wheel is in transmission connection with the driving assembly and is provided with a plurality of radial grooves, and when the grooved wheel rolls along the extension direction of the push rod, the plurality of radial grooves can be sequentially sleeved on the corresponding guide posts and can stir the guide posts to move so as to drive the push rod to slide between a contraction position and an extension position; when the push rod is in the extension position, the guide post at the tail end is separated from the radial groove.

2. The refrigerator of claim 1, wherein a distance between adjacent two radial grooves along an outer circumferential surface of the sheave is equal to a distance between adjacent two of the guide posts.

3. The refrigerator of claim 2, wherein the ejection mechanism further comprises:

the first limiting piece is arranged in the mounting seat and prevents the push rod from sliding out of the mounting seat when the push rod is at the extension position;

the second limiting part is arranged in the mounting seat, and when the push rod is located at the contraction position, the push rod is prevented from directly contacting with the mounting seat.

4. The refrigerator of claim 3, wherein the first and second stoppers are both stopper plates, and the ejection mechanism further comprises:

the third limiting part is arranged on the side surface of the push rod, and when the push rod is in an extended position, the third limiting part is in contact with the first limiting part; when the push rod is at the contraction position, the third limiting part is contacted with the second limiting part; the third limiting part is an elastic part.

5. The refrigerator according to any one of claims 1 to 4, wherein the driving assembly comprises a driving motor and a transmission gear arranged at an output end of the driving motor, and the transmission gear is in transmission connection with the sheave.

6. The refrigerator of claim 5, wherein the sheave and the drive gear are a unitary piece.

7. The refrigerator according to claim 6, wherein a mounting cavity is formed in the top of the door body, and the mounting seat is located in the mounting cavity.

8. The refrigerator according to claim 7, wherein the rotation mechanism comprises:

the second driven gear is in transmission connection with the driving motor;

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.

9. The refrigerator according to claim 8, further comprising: and the clutch is arranged between the output end of the driving motor and the rotating mechanism.

10. The refrigerator according to claim 9, 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.

11. The refrigerator according to claim 10, 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 clutch.

12. The refrigerator according to claim 11, wherein the second reduction mechanism is a reduction gear set.

13. The refrigerator according to claim 12, 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 drive assembly 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 clutch and the rotating mechanism and used for converting the rotation of the output shaft of the clutch around the width direction of the door body into the rotation of the rotating mechanism around the height direction of the door body.

14. The refrigerator of claim 13, 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.

15. The refrigerator of claim 14, wherein the second steering mechanism comprises:

a first bevel gear provided on an output shaft of the clutch;

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.

16. The refrigerator of claim 15, 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.

17. The refrigerator according to claim 16, 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.

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