CN112432416A - Refrigerator with lifting shelf - Google Patents

Abstract

The invention discloses a refrigerator with a lifting shelf, which comprises: the storeroom is equipped with lift layer frame and layer frame actuating mechanism in, and it includes: a driving motor installed on an inner wall of the storage chamber and outputting a torque by driving the output shaft; the lifting layer frame is fixedly connected with the supporting piece; the first pulley is fixedly connected to the driving output shaft, a traction rope is wound on the first pulley, and the other end of the traction rope is fixedly connected with the supporting piece; the traction rope comprises a rope body and a limiting block, the end face of the first pulley is provided with a splicing groove used for fixing the end part of the traction rope, the splicing groove comprises a limiting groove and a connecting groove, and the connecting groove extends to the pulley face of the first pulley. The shelf provided by the invention can automatically lift and lower, so that a user can conveniently store food materials with different heights, and meanwhile, the traction rope is fixed by arranging the insertion groove on the first pulley, so that the shelf is safe and reliable in work and convenient to assemble and disassemble.

Description

Refrigerator with lifting shelf

Technical Field

The invention relates to the field of intelligent household appliances, in particular to a refrigerator with a shelf capable of automatically lifting.

Background

With the increasing improvement of life quality, the occupancy rate of the multi-door refrigerator with the characteristics of large volume, multiple functions, classified storage and the like gradually increases, and the intelligent requirement degree of the refrigerator products by people is higher and higher.

The layer frame of current refrigerator product is mostly the unchangeable layer frame of fixed position, usually at the relative both sides shaping courage muscle of refrigerator inner bag, the layer frame place on the courage muscle can. In order to facilitate adjustment of a user, a plurality of liner ribs are reserved for adjusting the position of the shelf in the design of the refrigerator. However, the height between the shelves cannot adapt to the placement of articles with different volumes, the storage space has certain limitation, the space utilization rate in the refrigerator is low, and a lot of foods with larger volumes cannot be placed, so that the user experience is influenced. In addition, in recent years, the demand for large-capacity refrigerators has increased, and the height of the refrigerators has tended to increase, so that it is difficult to take articles from the shelves at the uppermost layer of the refrigerator, which is a problem for users.

In order to solve the above technical problems, the prior art provides an automatic lifting shelf structure, as shown in fig. 1 and 2, a mechanism for driving the shelf to lift comprises a screw 33 and a nut 34, and a power part drives the screw 33 to rotate to realize that the nut 34 moves up and down linearly; the nut 34 is coupled to the housing 321 of the slider assembly 32 to move the slider assembly 32 up and down along the guide rail 31. The power part comprises a motor 35, a first rotating shaft 38 and a second rotating shaft 39, an output shaft of the motor 35 is connected with the first rotating shaft 38 through a belt 36 to drive the first rotating shaft 38 to rotate, and one side of the first rotating shaft 38 transmits rotary motion to the screw rods 33 of the group of lifting mechanisms through a worm and gear pair speed reducing mechanism. The automatic lifting device of the shelf drives the worm gear mechanism and the lead screw nut mechanism to be converted into linear motion through the motor, the structure is complex, the worm gear mechanism and the lead screw nut mechanism occupy a large space, and the effective storage space of a storage room is influenced.

Disclosure of Invention

The invention aims to solve the technical problem that the existing refrigerator lifting shelf occupies a large space. Therefore, the invention provides the automatic lifting shelf of the refrigerator, which has a simple structure and occupies a small space.

In order to solve the technical problems, the invention provides the following technical scheme:

a refrigerator having a lifting shelf, comprising: the storeroom, be equipped with lift layer frame and drive in the storeroom the layer frame actuating mechanism that lift layer frame reciprocated, layer frame actuating mechanism includes: a driving motor installed on an inner wall of the storage chamber, the driving motor outputting a torque through a driving output shaft; the lifting layer rack is fixedly connected with the supporting piece; the first pulley is fixedly connected to the driving output shaft, a traction rope is wound on the first pulley, and the other end of the traction rope is fixedly connected with the supporting piece; the traction rope comprises a rope body and a limiting block located at one side end of the rope body, an insertion groove used for fixing the end of the traction rope is formed in the end face of the first pulley, the insertion groove comprises a limiting groove matched with the limiting block and a connecting groove matched with the rope body, and the connecting groove extends to the pulley face of the first pulley.

Compared with the prior art, the technical scheme of the invention has the following technical effects:

the refrigerator provided by the invention is provided with the shelf and the shelf driving mechanism, the shelf can move up and down under the driving of the shelf driving mechanism, and a user can store food materials with different heights conveniently. The shelf driving mechanism comprises a guide rail and a supporting piece which can be connected to the guide rail in a sliding manner, and the shelf is fixedly connected with the supporting piece; the driving motor drives the supporting piece to move up and down along the guide rail through the traction rope. Because the transmission mode of the layer frame driving mechanism adopts the traction mode of the traction rope, compared with the mode that the traditional worm gear mechanism and the screw nut mechanism are converted into linear motion, the layer frame driving mechanism has simple structure and small occupied space. Simultaneously, fix the haulage rope through the mode of pegging graft the spacing tip of haulage rope in the inserting groove on first pulley, its assembly method is simple reliable, convenient maintenance simultaneously.

Drawings

The objects and advantages of the present invention will be understood by the following detailed description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a prior art refrigerator with an automatic lifting shelf;

FIG. 2 is a schematic view of a driving mechanism of an automatic lifting/lowering shelf in the prior art;

FIG. 3 is a perspective view of a refrigerator having an automatic lifting shelf according to an embodiment of the present invention;

FIG. 4 is a schematic perspective view of a driving mechanism for a lifting rack according to an embodiment of the present invention;

FIG. 5 is a schematic view of a driving motor mounting structure according to an embodiment of the present invention;

FIG. 6 is a drawing illustrating the connection of the traction rope, the first pulley and the motor mounting box according to an embodiment of the present invention;

FIG. 7 is a schematic view of a fixed connection structure of a traction rope and a first pulley according to an embodiment of the present invention;

FIG. 8 is a diagram illustrating a connection relationship between a housing and a motor mounting box according to an embodiment of the present invention;

FIG. 9 is a sectional view showing the connection between the housing and the motor mounting case according to the embodiment of the present invention;

FIG. 10 is a schematic view of a guide rail according to an embodiment of the present invention;

FIG. 11 is a schematic structural view of a lifting shelf according to an embodiment of the present invention;

FIG. 12 is a diagram illustrating a connection relationship between a lifting shelf and a supporting member according to an embodiment of the present invention;

FIG. 13 is a schematic view of a layer shelf drive mechanism with an emergency stop device in accordance with an embodiment of the present invention under normal operating conditions;

FIG. 14 is a schematic view of a rack drive mechanism having an emergency stop device in an embodiment of the present invention in the event of a rack encounter;

FIG. 15 is a circuit diagram of a power supply commutation signal with a distress emergency stop device in an embodiment of the invention;

fig. 16A is a rear schematic view of the motor mounting box in an open state according to the embodiment of the present invention;

fig. 16B is a schematic forward view of the motor mounting case in an open state according to the embodiment of the present invention;

FIG. 17A is a schematic view of a cam activated first travel switch of the travel sensing device in an embodiment of the present invention;

FIG. 17B is a schematic view of the cam of the travel sensing device activating the second travel switch in an embodiment of the present invention;

FIG. 18 is a schematic view of the installation of the travel switch and the motor installation box in the embodiment of the invention; FIG. 15 is a schematic view of the mounting of the motor mounting box and the housing in the embodiment of the present invention;

FIG. 19 is a schematic view of a horizontal cut-away view of a refrigerated compartment in an embodiment of the present invention;

FIG. 20 is another schematic sectional view of the refrigerator compartment in a horizontal direction in an embodiment of the present invention;

FIG. 21 is a perspective view of a trim panel in an embodiment of the present invention;

FIG. 22 is a rear view of a trim panel in an embodiment of the present invention;

FIG. 23 is a view showing the fitting of the decorative plate and the shielding plate in the embodiment of the present invention;

FIG. 24 is an exploded view of a shutter according to an embodiment of the present invention;

FIG. 25 is a view showing a state where the shielding plate is positioned at the lowermost position in the embodiment of the present invention;

FIG. 26 is a view showing the state of the shielding plate when the shelf is at the uppermost position in the embodiment of the present invention;

FIG. 27 is a front and back view of the fascia and trim panel with the shelf at the lowest position according to the embodiment of the invention;

FIG. 28 is a front and back view of the trim panel and the shutter with the shelf in the intermediate position according to the embodiment of the present invention;

FIG. 29 is a front and back view of the trim panel and the shutter with the shelf at the highest position in accordance with an embodiment of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

FIG. 3 is a perspective view of one embodiment of the refrigerator of the present invention; referring to fig. 3, the refrigerator 1 of the present embodiment has an approximately rectangular parallelepiped shape. The refrigerator 1 has an external appearance defined by a storage chamber 100 defining a storage space and a plurality of door bodies 200 provided in the storage chamber 100, the storage chamber 100 having an open cabinet formed of a storage chamber inner, a storage chamber outer, and a foaming layer therebetween. The storage compartment 100 is vertically partitioned into a lower freezing compartment 100A and an upper refrigerating compartment 100B. Each of the partitioned spaces may have an independent storage space.

In detail, the freezing compartment 100A is defined at a lower side of the storage compartment 100 and may be selectively covered by a drawer type freezing compartment door 200A. The space defined above the freezing compartment 100A is partitioned into left and right sides to define the refrigerating compartment 100B, respectively. The refrigerating compartment 100B may be selectively opened or closed by a refrigerating compartment door body 200B pivotably mounted on the refrigerating compartment 100B.

In the storage chamber 100 of the embodiment of the present invention, the storage drawer 101 is provided at the lower side, and the storage drawer is provided in two layers, and includes two dry and wet preservation drawers provided at the lower layer, and a wider storage drawer provided at the upper sides of the dry and wet preservation drawers and used for storing longer food materials; the storage compartment 100 also includes shelves located above the storage drawer 101; wherein, the shelf comprises a fixed shelf 102 and a lifting shelf 103; the fixed shelves 102 are not vertically movable after being installed, and generally, a bladder rib is formed on both inner walls of the storage chamber 10, and the fixed shelves 102 are placed on the bladder rib. The lifting shelf 103 is a shelf which can be adjusted up and down after installation, and specifically, the lifting shelf 103 moves up and down under the driving of the shelf driving mechanism 300.

The relative positions of the lifting shelf 103 and the fixed shelf 102 are not unique, and the fixed shelf 102 may be located at the upper side, or the lifting shelf 103 may be located at the upper side. Preferably, in this embodiment, the lifting shelf 103 is located at the upper side, so that when the overall height of the refrigerator is high and a user cannot store food materials on the uppermost shelf, the lifting shelf 103 can be adjusted to move down to store food materials, thereby facilitating the use of the user.

As shown in fig. 4 and 5, the shelf driving mechanism 300 includes: a guide rail 301 fixed in the storage chamber 100, a support member 302 slidably connected to the guide rail 301, and the lifting shelf 103 fixedly connected to the support member 302; the lifting device further comprises a motor assembly for driving the supporting piece 302 to lift, wherein the motor assembly comprises a driving motor 303 and a speed reducing mechanism 312, the driving motor 303 outputs driving torque through a driving output shaft 313 after being reduced by the speed reducing mechanism 312, a traction rope 304 is wound on the driving output shaft 313, and the other end of the traction rope 304 is connected with the supporting piece 302; when the lifting shelf 103 needs to move downwards, the output shaft 3031 of the driving motor 303 is controlled to rotate towards a first direction, the traction rope 304 extends out, and the lifting shelf 103 moves downwards under the action of gravity; when the lifting layer frame 103 needs to move upwards, the output shaft of the driving motor 303 is controlled to rotate towards the second direction (opposite to the first direction), the traction rope 304 is wound gradually, and the lifting layer frame 103 moves upwards. Because the transmission mode of the layer frame driving mechanism adopts the traction mode of the traction rope, compared with the mode that the traditional worm gear mechanism and the screw nut mechanism are converted into linear motion, the layer frame driving mechanism has simple structure and small occupied space.

In order to facilitate the user to control the lifting of the lifting shelves 103, as shown in fig. 3, a shelf lifting control button 108 is provided on a sidewall of the storage room 100, and the shelf lifting control button 108 controls the driving motor to rotate forward, backward, or stop.

Specifically, in one mode, the shelf lifting control button 108 includes three buttons, namely a lifting button, a lowering button and a stopping button; wherein the ascending button is positioned at the upper side and is provided with an upward arrow mark, the stopping button is positioned at the middle and is provided with a stopping mark, and the descending button is positioned at the lower side and is provided with a downward arrow mark. In another mode, the shelf lifting control button 108 includes two buttons, which are a lifting/stopping button and a lowering/stopping button, respectively, and the lifting/stopping button is used for controlling the lifting or stopping of the lifting shelf 103; the descending/stopping button is used for controlling the descending or descending stopping of the lifting shelf 103.

In one embodiment, in the rack driving mechanism 300, one guide rail 301 and one support member 302 are provided, the guide rail 301 is mounted on a rear side wall of the storage chamber 100, and the support member 302 is fixedly connected to a middle rear position of the lifting rack 103; the driving motor 303 is disposed on the upper side of the guide rail 301, and in this way, the traction distance of the traction rope 304 is short, the structure is simpler, and the production cost is low. However, in this embodiment, the vertically movable shelves 103 are supported and fixed only at the intermediate positions, and if the difference in weight between the articles placed on both sides is large, the vertically movable shelves 103 may be inclined.

In another embodiment, as shown in fig. 4, in order to move the lifting/lowering shelves 103 up and down more stably, the two guide rails 301 are provided, and include a first guide rail 301A and a second guide rail 301B, which are respectively located at two opposite sides of the storage compartment 100, a first support 302A is slidably connected to the first guide rail 301A, and a second support 302B is slidably connected to the second guide rail 301B; the driving motor 303 is disposed at the rear side of the storage chamber 100, and a first pulley 305 is fixed to the driving output shaft 313; the left side and the right side of the storage chamber 100 are respectively provided with a second pulley 306 for converting the traction direction of the traction ropes, one end of each of the two traction ropes 304 is fixed on the first pulley 305, the middle position of each of the two traction ropes 304 is wound around the second pulley 306, and the other end of each of the two traction ropes 304 is fixed on the first support member 302A and the second support member 302B.

Specifically, as shown in fig. 5, two annular pulley grooves 3053 are formed on the tread of the first pulley 305, and the traction ropes 304 respectively pulling the left and right supports 302 are respectively wound in the pulley grooves 3053.

The fixing manner of the traction rope 304 and the first pulley 305 is not unique, and in order to facilitate the detachment and installation of the traction rope 304, as shown in fig. 6 and 7, preferably, an insertion groove 3051 for fixing the end of the traction rope is provided on the end surface of the first pulley 305, the traction rope 304 includes a rope body 3041 and a stopper 3042 located at one side end of the rope body, the insertion groove 3051 includes a stopper groove 3051A matched with the stopper 3042 and a connecting groove 3051B matched with the rope body 3041, and the outer end of the connecting groove 3051B extends to the pulley groove of the first pulley 305.

Specifically, the hauling cable is of a steel cable structure, and the cross-sectional area of the limiting block 3042 is larger than that of the cable body 3041. For example, as shown in fig. 6, the stop block 3042 is a rectangular block structure with a larger cross section, and is welded and connected with the rope body as a whole.

Specifically, the shape and size of the limiting groove 3051A are matched with those of the limiting block 3042, the width of the connecting groove 3051B is matched with the diameter of the rope 3041, and the connecting groove 3051B extends along an arc shape on the end face of the first pulley 305.

The driving motor 303 is mounted in a motor mounting box 309, the driving output shaft 313 extends out from the front side of the motor mounting box 309, and the first pulley 305 is fixedly connected with the driving output shaft 313 through a screw.

As shown in fig. 8 and 9, a cover 310 covering the first pulley 305 is disposed on the outer side of the motor mounting box 309, the cover 305 is connected to the motor mounting box 309 through a thread, and a mounting hole through which the traction rope 304 is disposed on the cover 310. In this way, in the front-rear direction, the limit blocks 3041 of the pulling rope 304 are respectively limited by the front end surfaces of the housing 310 and the motor mounting box 309, and cannot slide out.

Specifically, as shown in fig. 10, the guide rail 301 is selected as a steel ball slide rail, and the steel ball slide rail includes an outer rail 3011, an inner rail 3012, and a ball 3013 located therebetween; the outer rail 3011 is fixed to a sidewall of the storage compartment 100, and the support 302 is fixedly connected to the inner rail 3012. By adopting the steel ball slide rail, the lifting layer frame 103 can move up and down only by overcoming rolling friction, and the lifting layer frame 103 can move up and down only by smaller driving force under the same load.

The fixed connection mode of the lifting shelf 103 and the support member 302 is not exclusive, and the lifting shelf can adopt a threaded fixing mode or a buckling connection mode. Specifically, as shown in fig. 11, in the present embodiment, the lifting shelf 103 includes a shelf body 1031 and shelf support frames 1032 for supporting the shelf body 1031, the shelf support frames 1032 are fixedly connected to both sides of the lower portion of the shelf body 1031, and hooks 1033 are provided at the rear side of the shelf support frames 1032; the supporting member 302 is provided with a hanging hole 3021, and as shown in fig. 8, the hook 1033 of the partition supporting frame 1032 is hooked on the hanging hole 3021 of the supporting member 302. The hooking mode has high reliability, and is convenient for a user to disassemble and clean the lifting shelf 103.

The support 302 is connected to the pulling string 304 in a non-exclusive manner, and in one embodiment, a connecting hole is formed on the upper side of the support 302, and the pulling string 304 is directly connected to the connecting hole. In this way, the support 302 fixes the lifting layer frame 103 and the traction rope 304 at the same time, and the requirement on the self-supporting capability is high. Therefore, in this embodiment, as shown in fig. 12, preferably, the upper side of the support member 302 is provided with a pull rope fixing member 307, and the pull rope fixing member 307 is fixedly connected to the inner rail 3012. The traction rope fixing part 307 and the supporting part 302 are independent from each other and respectively support the lifting layer frame 103 and the traction rope 304, so that the supporting performance is easy to guarantee, and the manufacturing and the assembly are easy.

In the up-and-down moving process of the lifting shelf 103, there is a possibility that the article blocks the lifting shelf 103, and at this time, the lifting shelf 103 needs to be stopped immediately to continue moving, so as to avoid the article on the lifting shelf 103 from toppling over due to the deflection of one side of the lifting shelf 103. Therefore, the rack driving mechanism 300 further includes a stop-and-emergency device for controlling the driving motor to stop when the lifting rack encounters resistance while ascending or descending. In order to ensure the safety of the upward and downward movement of the lifting shelf 103, the emergency stop device comprises a downward emergency stop device and an upward emergency stop device, the downward emergency stop device is used for ensuring that the lifting shelf 103 stops moving downward when meeting the article blocking condition when moving downward, and the upward emergency stop device is used for ensuring that the lifting shelf 103 stops moving upward when meeting the article blocking condition when moving upward. Specifically, the downward emergency stop device and the upward emergency stop device can be realized by detecting the current of the driving motor 303, specifically, a current sensor for detecting the current is arranged on the driving motor 303, when the lifting shelf 103 moves upward or downward and meets resistance, the current of the driving motor 303 changes suddenly, and at this time, the controller controls the driving motor to stop running. In the emergency stop device when encountering a resistance, the start and stop of the driving motor are controlled by the change threshold of the current, if the threshold is not set reasonably enough, for example, if the threshold is set too large, the lifting shelf 103 cannot be stopped in time, and if the threshold is set too small, the lifting shelf 103 is stopped at a position where the lifting shelf is not to be stopped.

In order to provide a sudden stop device when a lift rack 103 is stopped when resistance is encountered, as shown in fig. 13 and 14, the sudden stop device includes a micro switch 601, the micro switch 601 is fixed on the rear wall of the refrigerating chamber 100B, an annular sleeve 6012 is disposed on a detection arm 6011 of the micro switch 601 and sleeved on the traction rope 304, preferably, the annular sleeve 6012 is sleeved on the traction rope section between the first pulley 305 and the second pulley 306, the traction rope 304 is in a normal state, as shown in fig. 13, because the lift rack 103 is under tension by gravity, the detection arm 6011 of the micro switch 601 keeps consistent in position in a normal working state, the circuit is in a normally closed state, when the lift rack 103 is stopped by an obstacle during the descent, as shown in fig. 14, the pulling rope 304 is changed from a tensioning state to a loosening state, the position of the detection arm 6011 of the microswitch 601 is changed from a normally closed state to a normally open state, at the moment, the control unit cuts off a circuit, the driving motor 303 stops rotating, and the lifting shelf 103 stops descending. Because the position of the traction rope can be changed immediately when the traction rope meets an obstacle, the response speed can be increased by detecting the position of the traction rope 304 through the microswitch 601, and the detection reliability is improved.

FIG. 15 is a schematic diagram of a power supply commutation signal for the emergency stop device; the power supply reversing chip 602 is used for switching the polarity of an output end according to signal input information, a first micro switch 601A and a second micro switch 601B which are positioned on two sides of the traction rope 304 are connected in series with each other and then connected in parallel with a diode 603, and then connected in series with the driving motor 303 and then connected to two output ends of the power supply reversing chip 602, wherein the anode of the diode 603 is connected with the driving motor 303, and the cathode of the diode 603 is connected with the power supply reversing chip 602.

Specifically, the input end of the power supply commutation chip 602 includes a +24V power supply interface and a GND end connected to the positive electrode and the negative electrode of a 24V dc power supply, and a signal input end connected to an I/O port of the single chip microcomputer for sending out the commutation signal; two output ends of the power supply reversing chip are connected in series in a loop to provide power supply signals for the emergency stop device when encountering a resistance. When the signal input end receives a reversing signal sent by the singlechip, the polarities of the power supplies of the two output ends are exchanged up and down (for example, the upper end +24V and the lower end GND are changed into the upper end GND and the lower end + 24V).

When the lifting shelf normally descends, the two output ends of the power supply reversing chip 602 are the upper end +24V lower end GND, the current direction in the loop is clockwise, the current flows through the first micro switch 601A and the second micro switch 601B on the two traction ropes 304 and then flows through the driving motor 303, and the driving motor 303 rotates to drive the lifting shelf 103 to descend. At the moment, the lifting shelf 103 is blocked by an obstacle in the descending process, so that the traction rope 304 becomes loose, one or two of the first microswitch 601A and the second microswitch 601B are disconnected, the original circuit is cut off, the driving motor 303 stops rotating, and the lifting shelf 103 stops descending. At this time, the lifting/lowering stage 103 does not operate by pressing the down button again, but the lifting/lowering stage 103 can be lifted by pressing the up button. When the up button is pressed, the single chip microcomputer receives the key information and then sends a power supply reversing signal to the power supply reversing chip 602 through the signal input end, and the power supplies at the two output ends of the power supply reversing chip 602 are reversed to be +24V at the lower end of the upper GND. At this time, the loop current becomes counterclockwise, the micro switch 601 (the first micro switch 601A and/or the second micro switch 601B) is turned off, but the current flows through the driving motor 303 and then is conducted through the diode 603, so that the driving motor 303 rotates in the reverse direction, and the lifting shelf 103 rises. When the lifting shelf 103 rises for a certain distance, the two micro switches 601A/601B restore the connection state, the function is restored by the descending key, and free control of the rising and the descending of the shelf can be realized by the rising key and the descending key.

Specifically, in order to further precisely control the moving position of the lifting shelf 103, the refrigerator further comprises a shelf stroke control device, wherein the shelf stroke detection device is used for detecting the moving stroke of the lifting shelf; the control device is used for controlling the start and stop of the driving motor according to the detection signal of the shelf stroke detection device. In order to facilitate the assembly, the driving motor 303, the speed reducing mechanism 312 and the shelf stroke detection device are integrally mounted in the motor mounting box 309, and a driving output shaft 313 for outputting the torque of the driving motor 303 extends out of the motor mounting box 309.

Specifically, as shown in fig. 16A and 16B, the stage stroke detection device includes: at least one travel switch installed in the motor installation box 309, wherein a trigger part is arranged on the travel switch; and the cam 311 is sleeved on the driving output shaft 313, and the cam 311 triggers the triggering parts when rotating to a set position along with the forward or reverse rotation of the driving output shaft 313.

More specifically, as shown in fig. 17A and 17B, the motor mounting box 309 includes a first travel switch 308A and a second travel switch 308B, the first travel switch 308A is provided with a first triggering portion 3081A, and the second travel switch 308B is provided with a second triggering portion 3081B. As shown in fig. 17A, when the lifting shelf 103 moves to the set highest position, the cam 311 rotates forward to the set position to trigger the first trigger portion 3081A, trigger the travel switch 308A to open, and stop the driving motor 303; as shown in fig. 17B, when the lifting/lowering shelf 103 moves to the set lowest position, the cam 311 reversely rotates to the set position to trigger the second triggering portion 3081B. Triggering the travel switch 308 to open, the driving motor 303 stops.

More specifically, as shown in fig. 16A and 16B, the motor mounting box 309 includes a front housing 3091 and a rear housing 3092, which are fastened and fixed together by bolts. As shown in fig. 14, the first and second travel switches 308A and 308B are fixed to the rear case 3092 by screws.

The speed reduction mechanism 312 is located between the output shaft 3031 of the driving motor 303 and the driving output shaft 313, and the speed reduction mechanism 312 includes a multi-stage gear transmission mechanism, and specifically, a two-stage or three-stage gear transmission mechanism may be provided according to a reduction ratio.

In order to reduce the space occupied by the shelf driving mechanism 300 in the storage room 100, as shown in fig. 5, a motor mounting groove 106 is formed in the rear wall of the storage room 100, a motor reinforcing iron 104 is disposed on the inner side of the rear wall of the storage room 100, and the motor mounting box 309 is fixed in the motor mounting groove 106.

Specifically, as shown in fig. 8, a connecting lug is arranged on the motor mounting box 309, and the motor mounting box 309 is connected to the motor reinforcing iron 104 through a bolt penetrating through the connecting lug. The output shaft 3031 of the driving motor 303 is parallel to the rear wall of the storage chamber 100, so that the size of the motor mounting box 309 in the thickness direction can be further reduced.

As shown in fig. 19 and 20, rail mounting grooves 107 are formed in left and right sidewalls of the storage compartment 100, rail reinforcing irons 105 are provided inside the left and right sidewalls of the storage compartment 100, and the rails 301 mounted in the rail mounting grooves 107 are connected to the rail reinforcing irons 105 by bolts. In this way, the drive motor 303 and the guide rail 301, which are two larger parts of the layer rack drive mechanism 300, are embedded in the installation grooves on the inner side of the inner wall of the storage room, and the whole layer rack drive mechanism 300 occupies a small space.

In order to make the interior of the storage chamber 100 more beautiful and better in integrity, the storage chamber further comprises a decorative structure covering the shelf driving mechanism 300, specifically, when the refrigerator is a direct-cooling refrigerator, and when the inner side of the storage chamber 100 is not provided with an air duct structure, an integral panel can be adopted to cover the area where the whole shelf driving mechanism 300 is located, openings are arranged on two sides of the panel, and the lifting shelf 103 can move up and down along the openings.

In this embodiment, the refrigerator 1 is an air-cooled refrigerator, as shown in fig. 19 and 20, an air duct assembly is disposed on an inner wall of a rear side of the storage chamber 100, wherein the air duct assembly includes an air duct cover plate 401 and air duct foam (not shown in the figure), the air duct foam is located on the rear side of the air duct cover plate 401 and is connected to the rear wall of the refrigerating chamber through the air duct cover plate 401 in a snap-fit manner, an air duct structure is formed inside the air duct foam, a plurality of air outlets 402 are respectively disposed on two sides of the air duct foam, and the air duct assembly supplies air into the refrigerating chamber 100B through the plurality of air outlets 402.

The decorative structure covering the above-mentioned shelf driving mechanism 300 includes two parts, one of which is the air duct cover 401 covering the driving motor 303 and the upper half of the pulling rope 304. Since the driving motor 303 is installed on the rear wall of the refrigerating chamber 100B, the driving motor 303 and the upper half portion of the pulling rope 304 can be covered with the duct cover 401 skillfully, so that the appearance integrity in the refrigerating chamber is better. Wherein another part is for covering the decorative board 501 in guide rail 301 region, decorative board 501 is located the wind channel apron 401 left and right sides, decorative board 501 lift layer frame wherein, as shown in fig. 19, fig. 20, decorative board 501 one end clamps in guide rail mounting groove 107, and the other end is fixed in through two screws on the back wall of walk-in 100B, just wind channel apron 401 both sides can cover the partial face of decorative board 501, like this, can keep the wholeness in the storage room, avoid guide rail and pulley assembly etc. to expose outside, deposit article influence lift layer frame lift scheduling problem.

The decorative plate 501 is provided with an air guide face 5014 at the air outlet 402 of the air duct assembly 400, and is used for guiding the air outlet direction of the air duct assembly. Specifically, the inclined surface or the inward concave arc surface of the air guide surface 5014 can prevent the decorative plate 501 from blocking the air outlet of the air duct assembly 400 by arranging the air guide surface 5014 at the air outlet 402, so that the refrigerating effect of the refrigerating chamber is affected.

As shown in fig. 21, 22 and 23, the decorative plate 501 is provided with a first opening 5011 extending vertically, the shelf support 1032 of the lifting shelf 103 is inserted into the first opening 5011, and the lifting shelf 103 can move up and down along the first opening 5011; in order to prevent the elevating shelf 103 from sliding friction with the side wall of the first opening 5011 when moving up and down, the area of the first opening 5011 is set to be slightly larger to prevent contact between the two, so that the shelf driving mechanism disposed inside is exposed through the first opening 5011, and the reliability of the shelf driving mechanism is affected when food in the storage chamber of the refrigerator enters inside; therefore, the decorative plate 501 is provided with a shielding plate 502 on a side far away from the lifting shelf 103, the shielding plate 502 is provided with a second opening 50214 matched with the size of the shelf support frame, the shelf support frame is inserted into the second opening 50214, and the shielding plate 502 can move up and down along with the lifting shelf 103 and cover at least part of the first opening 5011.

In this way, the shielding plate 502 can shield most of the area of the first opening 5011, when the lifting shelf 103 moves up and down, the shielding plate 502 moves along with the lifting shelf, the movement of the lifting shelf cannot be affected by the shielding plate 502, and the shielding structure avoids the risk of entering foreign matters inside the lifting shelf due to the communication between the inside and the outside. Meanwhile, the lifting reliability of the lifting shelf 103 is ensured.

The shielding plate 502 is not fixed only, but can be independently slidably connected to the guide plate at the rear side of the decorative plate, in this way, since there is still a gap between the shielding plate 502 and the decorative plate 501, the entry of foreign matters cannot be completely avoided. Therefore, in the present embodiment, the shielding plate 502 is slidably connected to the rear surface of the decorative plate 501, specifically, the decorative plate 501 is provided with the guide portion 5012, and the shielding plate 502 is slidably connected to the guide portion 5012 in the up-down direction.

The guide portion 5012 is not exclusively configured as long as the shutter 502 is longitudinally slid thereon. Preferably, as shown in fig. 22, the guide portion 5012 is formed by a plurality of L-shaped guide ribs formed on the decorative plate 501, the L-shaped guide ribs are arranged in two rows along the longitudinal direction, and the shielding plate 502 is located between the two rows of L-shaped guide ribs. In this way, when the shielding plate 502 is installed, the L-shaped guide rib can be pulled outwards to complete the installation, and the whole process is convenient and fast; further, since the sliding friction surface is small, the shutter 502 slides more smoothly.

In one embodiment, the shielding plate 502 is an integral plate structure, and the length of the shielding plate is greater than about 2 times the height of the first opening, so that the shielding plate 502 can always cover the first opening 5011 when the lifting shelf 103 is at the lowest position or the highest position.

Because the lifting distance of the lifting shelf 103 is large, if the shielding plate 502 is set as an integral plate, when the shielding plate is moved downwards to the lowest position, the lower end of the shielding plate 502 extends downwards too much to affect the fixation of the lower fixed shelf 102, or when the lifting shelf 103 is moved upwards to the highest position, the upper end of the shielding plate 502 extends upwards too much to be pressed against the top wall of the storage room; because, as shown in fig. 24, the shielding plate 502 includes a first shielding plate 5021 and a second shielding plate 5022 which are slidably connected to each other, the second opening 50214 is disposed on the first shielding plate 5021, and the second shielding plate 5022 is located at the upper side and/or the lower side of the second opening 50214; when the second shielding plate 5022 is located on the upper side of the second opening 50214, the decorative plate 501 is provided with a high-position limiting part (not shown in the figure) for limiting the highest position of the second shielding plate 5022; when the second shielding plate 5022 is located under the second opening 50214, the decorative plate 501 is provided with a low-position limiting part that limits the lowest position of the second shielding plate 5022.

In this way, by arranging the first shielding plate 5021 and the second shielding plate 5022 which can slide relatively, when the lifting shelf 103 moves upwards, the highest limit part limits the highest position of the second shielding plate 5022, and the second shielding plate 5022 slides to the inner side of the first shielding plate 5021, so that the risk that the second shielding plate 5022 moves upwards continuously to prop against the top wall of the storage room is avoided; when the lifting shelf 103 moves down, the lowest position limiting part limits the lowest position of the second shielding plate 5022, and the second shielding plate 5022 slides to the inner side of the first shielding plate 5021, so that the risk of interference between the second shielding plate 5022 and a supporting device of the lower fixed shelf due to continuous downward movement is avoided.

Specifically, the high-position limiting portion or the low-position limiting portion 5013 is a limiting rib formed on the decorative plate 501.

In this embodiment, as shown in fig. 23 to 29, the second shielding plate 5022 is located under the second opening 50214 to illustrate the relationship and operation process therebetween. For those skilled in the art, the second shielding plate 5022 located at the upper side of the second opening 50214 has the same working principle, and is not described in detail herein.

In order to further limit the sliding position of the second shielding plate 5022, the first shielding plate 5021 and the second shielding plate 5022 are respectively provided with a first limiting portion and a second limiting portion, as shown in fig. 25, when the first shielding plate 5021 moves towards the second shielding plate 5022, the first limiting portion cooperates with the low-position limiting portion to limit the second shielding plate 5022 to a first position; as shown in fig. 26, when the first shielding plate 5021 moves away from the second shielding plate 5022, the second stopper 5022 can be stopped at a second position by the second stopping portion.

Specifically, as shown in fig. 24, the first shielding plate 5021 is provided with a sliding rib 50211 at the lower side of the second opening 50214, and the second shielding plate 5022 is provided with a sliding groove 50221 matched with the sliding rib; the first limiting portion comprises a limiting protrusion 50213 arranged at the upper end of the sliding rib, when the lower end face of the second shielding plate 5022 is matched with the low limiting portion 5013, the limiting protrusion 50213 is matched with the upper end face of the second shielding plate 5022 to limit the second shielding plate 5022 to the first position, which is shown in fig. 25 specifically; the second position-limiting portion includes a first stopper 50212 disposed at a lower end of the sliding rib 50211 and a second stopper 50222 disposed at an upper end of the sliding groove 50221, and the first stopper 50212 and the second stopper 50222 cooperate to limit the second shielding plate 5022 to the second position, see fig. 26 specifically.

Fig. 27 to 29 are structural views of the front and rear sides of the decorative plate 501 when the lifting shelf 103 is moved from the lowest position to the middle position to the highest position; when the lifting shelf 103 is located at the lowest position, as shown in fig. 27, the second opening 50214 is located at the lowest side, the second shielding plate 5022 slides to the inner side of the first shielding plate 5021, the lower end face of the second shielding plate 5022 is matched with the low position limiting portion 5013, and the limiting protrusion 50213 is matched with the upper end face of the second shielding plate 5022 to limit the second shielding plate 5022 to the first position; when the lifting shelf 103 is located at the middle position, as shown in fig. 28, the second opening 50214 is located at the middle position, the first shielding plate 5021 slides relative to the second shielding plate 5022, so that the second shielding plate 5022 is located at the outer side of the first shielding plate 5021, and the first stopper 50212 cooperates with the second stopper 50222 to limit the second shielding plate 5022 to the second position; when the lifting shelf 103 is located at the highest position, as shown in fig. 29, the second opening 50214 is located at the highest position, and the first shielding plate 5021 drives the second shielding plate 5022 to move upward to the highest position.

Specifically, two T-shaped sliding grooves 50221 are formed in the second shielding plate 5022, and two T-shaped sliding ribs 50211 are correspondingly formed in the first shielding plate 5021.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (10)

1. The utility model provides a refrigerator with lift layer frame which characterized in that: the method comprises the following steps: the storeroom, be equipped with lift layer frame and drive in the storeroom the layer frame actuating mechanism that lift layer frame reciprocated, layer frame actuating mechanism includes: a driving motor installed on an inner wall of the storage chamber, the driving motor outputting a torque through a driving output shaft; the lifting layer rack is fixedly connected with the supporting piece; the first pulley is fixedly connected to the driving output shaft, a traction rope is wound on the first pulley, and the other end of the traction rope is fixedly connected with the supporting piece; wherein, the haulage rope includes the rope body and is located the stopper of rope body one side tip, be equipped with on the terminal surface of first pulley and be used for fixing the inserting groove of haulage rope tip, the inserting groove include with stopper complex spacing groove and with rope body complex spread groove, the free end of spread groove extends to first pulley is used for the winding on the pulley groove of haulage rope.

2. The refrigerator of claim 1, wherein: the cross-sectional area of the limiting block is larger than that of the rope body.

3. The refrigerator of claim 2, wherein: the spacing groove with the shape and the size of stopper match, the width of spread groove with the diameter size of the rope body matches, the spread groove is in extend along the arc on the terminal surface of first pulley.

4. A refrigerator having a lifting shelf according to any one of claims 1 to 3, wherein: the guide rails comprise a first guide rail and a second guide rail which are respectively fixed at two opposite sides of the storage room, the first guide rail is connected with a first supporting piece in a sliding way, and the second guide rail is connected with a second supporting piece in a sliding way; the left side and the right side of the storeroom are respectively provided with a second pulley used for converting the traction direction of the traction rope, one end of each traction rope is fixed on the insertion groove of the corresponding first pulley, the middle positions of the two traction ropes are wound around the second pulleys located on the two sides of the storeroom respectively, and the other ends of the traction ropes are fixed on the first supporting piece and the second supporting piece respectively.

5. The refrigerator of claim 4, wherein: the first pulley is located including the cover axle sleeve body and the three separation blade of radial extension on the drive output shaft, and is adjacent the separation blade is used for separating two the haulage rope, the inserting groove sets up in being located the outside two on the separation blade.

6. The refrigerator of claim 1, wherein: the driving motor is installed in the motor installation box, the driving output shaft extends out of the front side of the motor installation box, and the first pulley is fixedly connected with the driving output shaft through a screw.

7. The refrigerator of claim 6, wherein: the outer side of the motor mounting box is provided with a housing covering the first pulley, the housing is in threaded connection with the motor mounting box, and the housing is provided with a mounting hole penetrating through the traction rope.

8. The refrigerator of claim 1, wherein: the motor installation box is also internally provided with a shelf stroke detection device, and the shelf stroke detection device is used for detecting the moving stroke of the lifting shelf; and the control device is used for controlling the driving motor to start and stop according to the detection signal of the shelf stroke detection device.

9. The refrigerator of claim 9 having a lifting shelf, wherein: the shelf stroke detection device comprises: at least one travel switch arranged in the motor installation box, wherein a trigger part is arranged on the travel switch; and the cam is sleeved on the driving output shaft, and the cam triggers the triggering parts respectively when rotating to a set position along with the forward or reverse rotation of the driving output shaft.

10. The refrigerator of claim 1, wherein: the motor mounting box is characterized in that the motor mounting box further comprises a speed reducing mechanism, the speed reducing mechanism is located between an output shaft of the driving motor and the driving output shaft, and the speed reducing mechanism comprises a multi-stage gear transmission mechanism.

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