CN212081772U - Lifting shelf and household appliance - Google Patents

Abstract

The utility model provides a lift shelf and domestic equipment. The lifting shelf comprises: a shelf; a wire spool; a first rope, one end of which is fixed; the first movable pulley assembly is connected with one end of the shelf, and the other end of the first rope winds on the wire spool after passing around the first movable pulley assembly; one end of the second rope is fixed; and the second movable pulley assembly is connected with the other end of the shelf, and the other end of the second rope winds on the wire spool after bypassing the second movable pulley assembly, wherein the first rope and the second rope extend or shorten along with the rotation of the wire spool. Through the technical scheme of the utility model, promoted the load capacity of shelf effectively, reduced drive arrangement's power or can cancel drive arrangement, saved the space.

Description

Lifting shelf and household appliance

Technical Field

The utility model relates to a domestic equipment technical field particularly, relates to a lift shelf and a domestic equipment.

Background

The refrigerator shelf is supported by the container ribs of the refrigerator container, and the positions of the container ribs determine the positions and the intervals of the shelf, so that the shelf is fixed in position and cannot be adjusted, and the use of a user is inconvenient.

Some refrigerators have adopted shelf elevating gear, elevating gear's actuating mechanism sets up in the refrigerator top, occupies top bubble layer space, influences box thermal insulation performance, and on the other hand takes into account thermal insulation performance, and the necessary actuating mechanism small in size, and the drive is small, and the drive leads to actuating mechanism load capacity low, influences elevating gear load performance.

SUMMERY OF THE UTILITY MODEL

The present invention aims at least solving one of the technical problems existing in the prior art or the related art.

In view of the above, an object of the present invention is to provide a lifting shelf.

Another object of the present invention is to provide a household appliance.

In order to achieve the above object, the present invention provides a lifting shelf, including: a shelf; a wire spool; a first rope, one end of which is fixed; the first movable pulley assembly is connected with one end of the shelf, and the other end of the first rope winds on the wire spool after passing around the first movable pulley assembly; one end of the second rope is fixed; and the second movable pulley assembly is connected with the other end of the shelf, and the other end of the second rope winds on the wire spool after bypassing the second movable pulley assembly, wherein the first rope and the second rope extend or shorten along with the rotation of the wire spool.

In the technical scheme, the first rope, the second rope and the wire spool are arranged, and the first rope and the second rope are respectively wound on the wire spool, so that the first rope and the second rope can be driven to extend or shorten only by rotating the wire spool, the shelf is driven to lift, the adjustment of the size of the storage space on the shelf is realized, and the convenience in use of products is improved; meanwhile, the rope is a flexible part, and the occupied space of the rope is small, so that the positions of the wire spool and the rope can be more flexibly set, the occupation of the top space of equipment is avoided, the utilization rate of the equipment space is improved, and particularly in a refrigerator, the occupation of the top bubble layer space can be avoided, so that the influence on the heat insulation performance of a refrigerator body is reduced; in addition, the rope is driven by the rotation of the wire spool, so that the stepless adjustment of the lifting of the shelf can be realized, and the lifting noise of the rope is low; it should also be noted that the wire spool can be driven by a power device such as a motor, and can also be driven manually; the first rope and the second rope are wound on the wire spool, so that only one power device is needed, and the space occupied by the components of the lifting shelf is further reduced; further, first rope winding is on first movable pulley assembly, the second rope winding is on second movable pulley assembly, and first movable pulley assembly, second movable pulley assembly links to each other with the shelf respectively, be convenient for laborsaving, be favorable to adopting the motor of miniwatt, thereby under the prerequisite of the loading capacity of guaranteeing the shelf, reduce the volume of motor or reduce the quantity of motor, thereby reduce the space that the motor occupy, perhaps be favorable to reducing user's application of force, reduce working strength.

In the above technical solution, the lifting shelf further includes: and the driving mechanism is connected with the wire spool and is used for driving the wire spool to rotate.

In this technical scheme, through setting up actuating mechanism, be convenient for drive wire reel promotes the convenience that uses the lift shelf.

In the above technical solution, the driving mechanism includes: a first transmission assembly; the motor is connected with the first transmission assembly, and the first transmission assembly is further connected with the wire spool.

In the technical scheme, the motor and the first transmission assembly are arranged, and the first transmission assembly is respectively connected with the motor and the wire spool, so that the motor can drive the wire spool through the first transmission assembly, the automatic lifting of the shelf is realized, manual lifting of a user is not needed, the convenience of using equipment is improved, and the labor intensity is reduced; the arrangement of the first transmission assembly is beneficial to improving the flexibility and convenience of motor position arrangement and power selection.

In the above technical solution, the first transmission assembly includes: the worm is connected with a driving shaft of the motor; the gear at the input end of the multi-stage gear set is meshed with the worm; the gears at the output end of the multi-stage gear set are coaxially connected with the wire spool.

In the technical scheme, the first transmission assembly comprises a worm and a multi-stage gear set, so that the position and the direction of the motor can be flexibly set, and gear sets of different levels can be conveniently selected to adapt to different object placing requirements, so that the model, the specification and the like of the motor can be flexibly selected; in addition, the worm is connected with the motor and the multi-stage gear set, the principle that the unfolding spiral angle of the worm is smaller than the friction angle of contact of a worm gear and the worm can be utilized, after the motor stops working, self-locking of the lifting shelf is achieved, the shelf is prevented from automatically falling under the action of gravity, and the use convenience of the lifting shelf is further improved.

In the above technical solution, the reduction mechanism is constructed by multiple gear sets.

In this technical scheme, construct reduction gears through multistage gear train, adopt the mode of the gear of minor diameter to drive the gear of major diameter promptly, realize the purpose that the speed reduction increases the torsion to can reduce the power requirement to the motor, promote the load capacity of lift shelf, and along with the reduction of the power of motor, can also reduce the volume or the quantity of motor correspondingly, thereby reduce the space that the motor occupied, improve equipment's space utilization.

In any one of the above solutions, the lifting shelf further comprises: and the display control assembly is connected with the motor and is configured to control the operation of the motor.

In this technical scheme, control the operation of motor through setting up the apparent subassembly of controlling, the user of being convenient for realizes the lift to the shelf through showing accuse subassembly input control instruction, has promoted the convenience that equipment used.

In the above technical solution, the lifting shelf further includes: the ferromagnetic body is arranged at least one end of the shelf; the magnetic switch assembly is arranged adjacent to the shelf, a first induction point and a second induction point which are used for inducing ferromagnetism are arranged on the magnetic switch assembly at intervals, and the magnetic switch assembly is also electrically connected with the display control assembly.

In the technical scheme, the ferromagnetic body and the ferromagnetic body switch component are arranged, and the first induction points and the second induction points are arranged on the magnetic switch component at intervals, so that the ferromagnetic body is induced by the two induction points to limit the lifting height of the shelf, and the shelf is prevented from exceeding the lifting range to cause faults; wherein, the magnetic switch subassembly is connected with showing accuse subassembly electricity, is convenient for after first induction point or second induction point sense ferromagnet and is close, to showing accuse subassembly and send control signal to be convenient for show the operation that accuse subassembly stopped the motor, realize that the shelf goes up and down automatic spacing.

The magnetic switch assembly comprises any one of a Hall switch assembly, a magnetron assembly and a proximity switch assembly.

In the above technical solution, the driving mechanism includes: a second transmission assembly; and the knob is connected with the second transmission assembly, and the second transmission assembly is also connected with the wire spool.

In the technical scheme, the knob and the second transmission assembly are arranged, and the second transmission assembly is respectively connected with the knob and the wire spool, so that a user can drive the wire spool to rotate through the second transmission assembly by twisting the knob, the lifting height of the shelf can be controlled more directly, a motor is not needed, the space occupied by the lifting shelf can be reduced, the space utilization rate is improved, energy can be saved, and energy consumption is reduced; the arrangement of the second transmission assembly is beneficial to improving the flexibility and convenience of the knob position arrangement.

In the above technical solution, the second transmission assembly includes: the first gear and the second gear of intermeshing, first gear and knob are connected, and the second gear is connected with the wire reel is coaxial, and the diameter of first gear is less than the diameter of second gear.

In the technical scheme, the diameter of the first gear is smaller than that of the second gear, so that the first transmission assembly can realize the functions of reducing speed and increasing torque, the force application requirement when a user twists a knob is favorably reduced, and labor is saved when the user uses equipment.

In any one of the above solutions, the driving mechanism further includes: the rotating piece is connected with the wire spool and rotates along with the wire spool; the tensioning spring is connected with the rotating piece and rotates along with the rotating piece; the sleeve, the tensioning spring is located in the sleeve, and the sleeve is used for restricting the inflation of tensioning spring.

In this technical scheme, rotate along with rotating the piece through setting up the tensioning spring, and set up the inflation of sleeve restriction tensioning spring, be convenient for like this after the user stops wrench movement knob, when the wire reel descends automatically under the weight effect, can drive the tensioning spring through rotating the piece and rotate and expand, thereby the top is tight on the sleeve inner wall, through the frictional force between sleeve inner wall and the tensioning spring, the further rotation of restriction tensioning spring, thereby the restriction rotates the piece, the rotation of wire reel, make the shelf stop to descend, realize the auto-lock.

It can be understood that when the shelf is required to descend, the wire spool is rotated by twisting the knob, the tension spring is expanded, and friction force can be overcome by force application of a user, so that the wire spool is rotated, and the descent of the shelf is realized.

In any one of the above solutions, the lifting shelf further comprises: the knob is arranged on one side of the fixing seat, and the driving mechanism is arranged on the other side of the fixing seat.

In the technical scheme, the knob and the driving mechanism are conveniently mounted on the equipment through the arrangement of the fixed seat.

In any one of the above solutions, the lifting shelf further comprises: the guide assembly comprises a guide rail and a sliding block, and the sliding block is slidably arranged on the guide rail; two ends of the shelf are respectively provided with a guide component, and the slide block is connected with the shelf.

In this technical scheme, through setting up the direction subassembly, be convenient for ensure the stability and the reliability of shelf lift orbit, promote the stability of shelf work.

In the above technical solution, the lifting shelf further includes: one end of a first rope is fixed on the first fixed pulley component; and one end of the second rope is fixed on the second fixed pulley component.

In this technical scheme, through setting up first fixed pulley assembly and second fixed pulley assembly, be convenient for utilize the fixed pulley can change the performance of rope direction, set up the position of wire reel in a flexible way.

In the technical scheme, the first movable pulley component is directly connected with the shelf, or the first movable pulley component is connected with the shelf through the sliding block; the second movable pulley component is directly connected with the shelf, or the second movable pulley component is connected with the shelf through a sliding block.

In this technical scheme, first loose pulley assembly and shelf lug connection, or be connected with the shelf through the slider, loose pulley assembly and shelf lug connection are moved to the second, or are connected with the shelf through the slider, are convenient for set up the position that loose pulley assembly, second moved loose pulley assembly in a flexible way like this, still are convenient for better balanced shelf, reduce the circumstances that unbalance appears in the lift in-process shelf, promote the stability and the reliability of lift shelf work.

In any one of the above solutions, the lifting shelf further comprises: a rope wire tube in which at least a part of at least one of the first rope and the second rope is provided; and/or a plurality of winding grooves are arranged on the winding disc.

In the technical scheme, the rope wire pipe is arranged, so that the rope is protected conveniently, equipment is protected, the abrasion of the equipment caused by the sliding of the rope is avoided, and the lifting fault caused by the damage of the stored object to the rope is avoided; be equipped with a plurality of wire winding grooves on the wire reel, be convenient for reduce the abnormal sound that the friction produced between the rope, the noise reduction.

The utility model discloses technical scheme of second aspect provides a domestic equipment, include: a box body; the lifting shelf in any technical scheme of the first aspect is arranged in the box body.

In the technical scheme, by adopting the lifting shelf in any one of the technical schemes, all the beneficial effects of the technical scheme are achieved, and the description is omitted; through the setting of box, be convenient for hold the lift shelf to through the space in shelf and the box, construct the space of depositing article.

In the technical scheme, an air duct panel is arranged in the box body; at least part of the lifting shelf is arranged at the rear side of the air duct panel.

In this technical scheme, locate the rear side of wind channel panel through at least part of lifting shelf, be favorable to reducing the mutual interference between the part of the object of depositing in the space and lifting shelf, ensure the stability and the reliability of lifting shelf work, still be favorable to keeping the regularity and the wholeness of storing space, promote the convenience of storing.

In the technical scheme, the household equipment is a refrigerator or an ice chest, and the rope line pipe of the lifting shelf is fixedly arranged in the foaming layer on the back of the refrigerator.

In the technical scheme, the rope wire pipe is arranged in the foaming layer at the back of the refrigerator, so that the rope wire pipe is favorably fixed, the space occupied by the rope wire pipe can be reduced, and the influence on the heat insulation performance of the refrigerator is small.

It is to be understood that the home appliance is not limited to a refrigerator or an ice chest, but may be any one of an electric oven, an electric steamer, a refrigerator, a wardrobe, and a shoe chest.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

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

fig. 2 is a schematic front view of a refrigerator according to another embodiment of the present invention;

FIG. 3 is an enlarged schematic view of portion A of FIG. 2;

fig. 4 is a schematic view of a partial top structure of a refrigerator according to an embodiment of the present invention;

FIG. 5 is an enlarged partial sectional view of the portion B in FIG. 4;

fig. 6 is a partial structural schematic view of a driving mechanism of a refrigerator according to an embodiment of the present invention;

fig. 7 is a schematic view of a partially exploded perspective structure of a driving mechanism of a refrigerator according to an embodiment of the present invention;

fig. 8 is a schematic partial perspective view of a driving mechanism of a refrigerator according to an embodiment of the present invention;

fig. 9 is a schematic front view of a refrigerator according to another embodiment of the present invention;

fig. 10 is a schematic perspective view of a refrigerator according to another embodiment of the present invention;

fig. 11 is a schematic view of a partial top view of a refrigerator according to another embodiment of the present invention;

FIG. 12 is an enlarged partial sectional view of section C of FIG. 11;

fig. 13 is a partial schematic structural view of a driving mechanism of a refrigerator according to another embodiment of the present invention;

FIG. 14 is a schematic cross-sectional view in the direction D-D of FIG. 13;

fig. 15 is a schematic perspective exploded view of a driving mechanism of an elevating shelf according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 15 is:

10 shelves, 12 wire reels, 120 wire winding grooves, 14 first rope, 16 second rope, 18 first transmission assembly, 180 worm, 182 first duplicate gear, 184 second duplicate gear, 186 third duplicate gear, 188 big gear, 20 motor, 22 display control assembly, 24 ferromagnet, 26 magnetic switch assembly, 260 first induction point, 262 second induction point, 30 second transmission assembly, 300 first gear, 302 second gear, 32 knob, 34 rotating piece, 36 tension spring, 38 sleeve, 40 fixing base, 42 guide assembly, 420 guide rail, 422 slider, 44 first fixed pulley assembly, 46 first movable pulley assembly, 48 second fixed pulley assembly, 50 second movable pulley assembly, 52 rope conduit, 60 box body, 62 air duct panel.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings, which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Some embodiments of the present invention are described below with reference to fig. 1 to 15.

As shown in fig. 1 to 15, a lifting shelf according to an embodiment of the present invention is used for a refrigerator, including: shelf 10, wire spool 12, first and second cords 14, 16, first and second movable pulley assemblies 46, 50.

As shown in fig. 2 and 3, in particular, a first movable pulley assembly 46 is connected to one end of the shelf 10, and a second movable pulley assembly 50 is connected to the other end of the shelf 10; one end of the first rope 14 is fixed, and the other end of the first rope is wound on the wire spool 12 after passing through the first movable pulley assembly 46; second cord 16 is secured at one end and wraps around spool 12 after passing around second movable sheave assembly 50, and is stored on rack 10, wherein first cord 14 and second cord 16 lengthen or shorten as spool 12 rotates.

In this embodiment, by providing the first movable pulley assembly 46 and the second movable pulley assembly 50, and the first movable pulley assembly 46 and the second movable pulley assembly 50 are respectively connected to the shelf 10, the first rope 14 bypasses the first movable pulley assembly 46, and the second rope 16 bypasses the second movable pulley assembly 50, so that when the shelf 10 is lifted, labor is saved, and a low-power motor is used, so that the volume of the motor 20 is reduced or the number of the motors 20 is reduced on the premise of ensuring the load force of the shelf 10, the space occupied by the motor 20 is reduced, or the force application of a user is reduced, and the working strength is reduced; in addition, the first rope 14 and the second rope 16 are respectively wound on the wire spool 12, so that the first rope 14 and the second rope 16 can be driven to extend or shorten as long as the wire spool 12 rotates, the shelf 10 is driven to lift, the size of an object placing space on the shelf 10 is adjusted, and the use convenience of products is improved; meanwhile, the rope is a flexible part, and the occupied space of the rope is small, so that the positions of the wire spool 12 and the rope can be more flexibly set, the occupation of the top space of equipment is avoided, the utilization rate of the equipment space is improved, and particularly in a refrigerator, the occupation of the top bubble layer space can be avoided, so that the influence on the heat preservation performance of the refrigerator body 60 is reduced; in addition, the rope is driven by the rotation of the wire spool 12, so that the stepless adjustment of the lifting of the shelf 10 can be realized, and the lifting noise of the rope is low; it should also be noted that the wire spool 12 may be driven by a power device such as the motor 20, or may be manually driven; the first cord 14 and the second cord 16 are wound around the spool 12, thus requiring only one power device and further reducing the space required for the components of the lifting shelf.

It is understood that the number of movable pulleys in each of the first movable pulley assembly 46 and the second movable pulley assembly 50 may be one or more.

In some embodiments, the wire spool 12 may be directly driven manually.

In other embodiments, the lifting shelf further comprises a drive mechanism coupled to the spool 12 for rotating the spool 12.

As shown in fig. 6 to 8, further, the driving mechanism includes: the first transmission assembly 18 and the motor 20, the first transmission assembly 18 is respectively connected with the motor 20 and the wire spool 12, so that the motor 20 can drive the wire spool 12 through the first transmission assembly 18, and the automatic lifting of the shelf 10 is realized.

It is to be understood that the motor 20 is any one of a dc motor, an asynchronous motor, and a synchronous motor.

Further, the first transmission assembly 18 is any one of a gear assembly, a sprocket assembly, and a pulley assembly.

As shown in fig. 6 and 7, in particular, in some embodiments, the first transmission assembly 18 comprises: a worm 180 and a multi-stage gear set, wherein the worm 180 is connected with a driving shaft of the motor 20; the gears at the input end of the multi-stage gear set are meshed with the worm 180; the gears at the output end of the multi-stage gear set are coaxially connected with the wire spool 12, and the gears at the output end and the wire spool 12 can be integrally formed or can be coaxially connected through a transmission shaft.

The multistage gear set comprises a plurality of duplicate gears, the worm 180 is combined, the structure of the multistage gear set is more compact, the multistage gear set is prevented from occupying too much space in a single direction, the worm 180 is connected with the motor 20 and the multistage gear set, the principle that the expansion spiral angle of the worm 180 is smaller than the friction angle of contact of the worm gear 180 can be utilized, after the motor 20 stops working, self-locking of the lifting shelf is achieved, the shelf 10 is prevented from automatically descending under the action of gravity, and the use convenience of the lifting shelf is further improved.

The gears in the multi-stage gear set are any one of metal gears, plastic gears or polyformaldehyde plastic gears or metal and plastic composite material gears; the number of stages of the multi-stage gear set may be 2, 3, 4, or more.

Further, the speed reducing mechanism is constructed by the multistage gear set, namely, the gear with the larger diameter is driven by the gear with the smaller diameter from the input end to the output end of the multistage gear set, so that the purposes of speed reduction and torque increase are achieved, the power requirement on the motor 20 can be reduced, the volume or the quantity of the motor 20 is correspondingly reduced, the space occupied by the motor 20 is reduced, and the space utilization rate of equipment is improved.

In this embodiment, since only one wire spool 12 is used to drive the shelf 10 to ascend and descend, only one motor 20 is needed to drive the shelf 10 to ascend and descend, and the power of the motor 20 can be further reduced by reducing the speed and increasing the torque of the multi-stage gear set, thereby reducing the volume of the motor 20.

In any of the above embodiments, as shown in fig. 1 and 2, the lifting shelf further comprises: and a display and control assembly 22 connected with the motor 20, wherein the display and control assembly 22 is configured to control the operation of the motor 20.

In this embodiment, the operation of the motor 20 is controlled by arranging the display control assembly 22, so that a user can conveniently input a control command through the display control assembly 22 to lift the shelf 10, and the convenience of using the device is improved.

Further, the display control component 22 includes a controller and a display, and a user can input a control instruction through the controller, and check a control result through the display, or input an instruction such as an accurate lifting height according to a prompt of the display, so as to further improve convenience of using the device.

As shown in fig. 3, in the above embodiment, the elevating shelf further includes: a ferromagnetic body 24, at least one end of the shelf 10 is provided with the ferromagnetic body 24, and the ferromagnetic body 24 is lifted along with the shelf 10; the magnetic switch assembly 26 is arranged adjacent to the shelf 10, a first induction point 260 and a second induction point 262 for inducing the ferromagnetic body 24 are arranged on the magnetic switch assembly 26 at intervals, and the magnetic switch assembly 26 is also electrically connected with the display control assembly 22; along with the lift of shelf 10, drive ferromagnet 24 and go up and down together, make ferromagnet 24 by first induction point 260 or second induction point 262 response, rethread magnetic switch subassembly 26 sends control signal to showing accuse subassembly 22 to show accuse subassembly 22 control motor 20 stop the operation, thereby stop the lift of shelf 10, realize carrying out spacing purpose to the high lift of shelf 10, avoid shelf 10 to surpass the lift scope and lead to the trouble.

The magnetic switch assembly 26 includes any one of a hall switch assembly, a magnetron assembly, and a proximity switch assembly.

It will be appreciated that the lifting range of the shelf 10 is related to the distance between the first sensing point 260 and the second sensing point 262, and the larger the distance between the first sensing point 260 and the second sensing point 262, the larger the lifting range of the shelf 10.

In other embodiments, as shown in fig. 9 and 10, the motor 20 is not used, but is manually actuated by a user, and in particular, the actuating mechanism comprises: second transmission assembly 30 and knob 32, second transmission assembly 30 is connected with knob 32 and wire reel 12 respectively, the user twists knob 32, pass the moment of torsion to second transmission assembly 30, second transmission assembly 30 drive wire reel 12 rotates, thereby realize the extension and the shortening of first rope 14 and second rope 16, and then realize the lift of shelf 10, motor 20 has been reduced like this, be favorable to reducing the space that the lift shelf occupy, promote space utilization, can also the energy saving, reduce the energy consumption.

It will be appreciated that the knob 32 may be replaced with a lever or handle; or the knob 32 is not provided and the user directly dials the wire spool 12 by hand.

Further, the second transmission assembly 30 is any one of a gear assembly, a sprocket assembly, and a pulley assembly. As shown in fig. 13 to 15, taking a gear assembly as an example, the second transmission assembly 30 includes a first gear 300 and a second gear 302, the first gear 300 and the second gear 302 are engaged with each other, the first gear 300 is connected with the knob 32, the second gear 302 is coaxially connected with the wire spool 12, and the diameter of the second gear 302 is larger than that of the first gear 300, so that the first transmission assembly 18 can realize the functions of speed reduction and torque increase, which is beneficial to reducing the force application requirement when a user twists the knob 32, and saves labor when the user uses the device.

As shown in fig. 15, further, the driving mechanism further includes: a rotor 34 connected to the spool 12 and rotating with the spool 12; a tension spring 36 connected to the rotation member 34 and rotating with the rotation member 34; a sleeve 38, the tension spring 36 being disposed within the sleeve 38, the sleeve 38 being adapted to limit expansion of the tension spring 36.

In this embodiment, the tension spring 36 is arranged to rotate with the rotating member 34, and the sleeve 38 is arranged to limit the expansion of the tension spring 36, so that when the wire spool 12 automatically descends under the action of the weight after the user stops twisting the knob 32, the tension spring 36 is driven by the rotating member 34 to rotate and expand so as to abut against the inner wall of the sleeve 38, and the further rotation of the tension spring 36 is limited by the friction force between the inner wall of the sleeve 38 and the tension spring 36, so that the rotation of the rotating member 34 and the wire spool 12 is limited, the rack 10 stops descending, and self-locking is realized.

It will be appreciated that when it is desired to lower the shelf 10, twisting the knob 32 causes the spool 12 to rotate and the tension spring 36 will likewise expand, whereupon the spool 12 may be rotated by the user's force against the friction to effect the lowering of the shelf 10.

The lifting shelf further comprises: the fixed seat 40, the driving mechanism and the knob 32 are respectively arranged at two sides of the fixed seat 40; the knob 32 and drive mechanism are easily mounted to the device by the provision of the mounting block 40.

In any of the above embodiments, to ensure stability and reliability of the lifting of the shelf 10, the lifting shelf further comprises a guide assembly 42.

As shown in fig. 2, 3 and 10, two ends of the shelf 10 are respectively provided with a guide assembly 42, and of the two guide assemblies 42, one is connected with a first movable pulley assembly 46, and the other is connected with a second movable pulley assembly 50; specifically, the guide assembly 42 includes a guide rail 420 and a slider 422, the slider 422 being slidably disposed on the guide rail 420; the first movable pulley assembly 46 and the second movable pulley assembly 50 are connected to the shelf 10 through a slider 422, respectively.

In other embodiments, the first movable pulley assembly 46 and the second movable pulley assembly 50 are respectively connected to the shelf 10, and the shelf 10 is connected to the sliding block 422, and the sliding block 422 slides along the guide rail 420 as the shelf 10 is lifted.

It can be understood that, whether the motor 20 is used, or the user directly drives the wire spool 12, or the user drives the wire spool 12 through the knob 32 and the second transmission assembly 30, in these several ways, the purpose of saving labor or reducing the power of the motor 20 can be achieved by adding a movable pulley.

As shown in fig. 2 and 3, in particular, in any of the above embodiments, the lifting shelf further comprises: a first fixed sheave assembly 44 and a second fixed sheave assembly 48.

The shelf 10 is provided at one end with a first fixed sheave assembly 44, and the first rope 14 is secured at one end to the first fixed sheave assembly 44.

The other end of the shelf 10 is provided with a second fixed sheave assembly 48, and one end of the second rope 16 is fixed to the second fixed sheave assembly 48.

In this embodiment, the first fixed pulley assembly 44 and the second fixed pulley assembly 48 are provided to facilitate the ability of the fixed pulleys to change the direction of the cable, thereby providing flexibility in positioning the spool 12.

In any of the above embodiments, as shown in fig. 4 and 11, the lifting shelf further comprises: the rope conduit 52, as shown in fig. 5 and 12, has at least a portion of at least one of the first rope 14 and the second rope 16 disposed within the rope conduit 52 to protect the ropes and equipment from wear.

As shown in fig. 8, in some embodiments, the spool 12 is provided with a plurality of winding slots 120, so that the first rope 14 and the second rope 16 are respectively disposed in different winding slots 120, and when the first rope 14 or the second rope 16 is wound on the spool 12, the first rope 14 or the second rope 16 is prevented from being wound in the same winding slot 120, thereby reducing abnormal noise caused by friction between ropes and reducing noise.

An embodiment of the second aspect of the present invention provides a refrigerator, which comprises a box body 60 and a lifting shelf of any one of the embodiments of the first aspect, wherein the lifting shelf is arranged in the box body 60.

In this embodiment, by using the lifting shelf of any one of the above embodiments, all the beneficial effects of the above embodiments are achieved, and are not described herein again; the box 60 is arranged to accommodate a lifting shelf, and a space for storing articles is constructed by the space in the shelf 10 and the box 60.

As shown in fig. 1 and 9, further, a duct panel 62 is disposed in the box 60; at least part of the lifting shelf is arranged at the rear side of the air duct panel 62, so that the mutual interference between objects stored in the space and the parts of the lifting shelf is reduced, the working stability and reliability of the lifting shelf are ensured, the regularity and integrity of the storage space are kept, and the convenience of storage is improved.

The rear side of the air duct panel is relative to the door body of the refrigerator, one side of the air duct panel facing the refrigerator door body is the front side, and one side of the air duct panel back to the door body is the rear side.

In the above embodiment, the household appliance is a refrigerator, and the rope line pipe 52 of the lifting shelf is fixedly arranged in the foaming layer at the back of the refrigerator; the household appliance can also be a refrigerator, and the rope line pipe 52 of the lifting shelf is fixedly arranged in the foaming layer at the back of the refrigerator.

The guide rails 420 of the first fixed sheave assembly 44, the second fixed sheave assembly 48, and the guide assembly 42 are fixed to the casing 60.

When the motor 20 is used, the magnetic switch assembly 26 is also fixed to the case 60; the first and second sensing points 260 and 262 of the magnetic switch assembly 26 are disposed in a top-to-bottom direction of the refrigerator.

It is to be understood that the home appliance is not limited to a refrigerator or an ice chest, but may be any one of an electric oven, an electric steamer, a refrigerator, a wardrobe, and a shoe chest.

According to the refrigerator provided by the application, the refrigerator is provided with the electric lifting shelf, the driving mechanism of the shelf 10 is small in size and low in running noise, does not occupy storage space, does not affect the appearance and does not affect the heat preservation performance of the refrigerator body 60; the shelf 10 can be automatically adjusted without taking out food on the shelf 10, and stepless adjustment can be performed within the adjustment range.

Specifically, the overall elevator shelf includes a display control assembly 22, a glass shelf 10, a guide assembly 42, first and second fixed sheave assemblies 44, 48, first and second movable sheave assemblies 46, 50, a drive mechanism, first and second cords 14, 16, a magnetic switch assembly 26, and a cord conduit 52. Because the speed reducing mechanism is constructed by using the movable pulley and the multi-stage gear set, the lifting shelf saves labor and reduces the specification requirement of the motor 20.

The guide assembly 42 is composed of two parts, namely a guide rail 420 and a sliding block 422, and the sliding block 422 can vertically slide along the guide rail 420; the glass shelf 10, the first movable pulley assembly 46 and the second movable pulley assembly 50 are respectively connected with a sliding block 422 of one guide assembly 42; the guide assembly 42, the first fixed pulley assembly 44 and the second fixed pulley assembly 48 are fixedly connected with the box body 60 respectively.

At least one of the first movable pulley assembly 46 and the second movable pulley assembly 50 carries the ferromagnetic member 24, and the ferromagnetic member 24 cooperates with the magnetic switch assembly 26 to limit travel.

The first cable 14 is fixedly connected to the first fixed sheave assembly 44 at one end and to the spool 12 at the other end, and passes through the pulleys of the first movable sheave assembly 46 and the first fixed sheave assembly 44 and the cable tube 52 therebetween. The first cord 14 is slidable along the cord tube 52, and the cord tube 52 is fixed to the back of the cabinet 60 and placed in the foam layer.

The second cord 16 is fixedly connected at one end to the second fixed sheave assembly 48 and at the other end to the spool 12, and passes between the second movable sheave assembly 50 and the sheave of the second fixed sheave assembly 48, and a cord tube 52. The second cord 16 is slidable along a cord tube 52, and the cord tube 52 is fixed to the back of the cabinet 60 and placed in the foam layer.

The driving mechanism comprises an upper shell, a lower shell, a wire spool 12, a large gear 188, a first duplicate gear 182, a second duplicate gear 184, a third duplicate gear 186, a worm 180 and a motor 20, wherein the wire spool 12 is connected with the large gear 188, the large gear 188 and the wire spool 12 can be integrated into a whole along with the rotation of the large gear 188, and the wire spool 12 can comprise a plurality of annular wire grooves to avoid abnormal sound caused by friction among ropes.

The output shaft of the motor 20 is fixedly connected with the worm 180, and the worm 180 rotates along with the output shaft; the first duplicate gear 182 is a gear at the input end and is meshed with the worm 180 for rotation, and the second duplicate gear 184 and the worm 180 are paired gears which are worm gears or helical gears; similarly, the first duplicate gear 182, the second duplicate gear 184, the third duplicate gear 186 and the large gear 188 are paired to perform meshing motion, the large gear 188 is a gear at the output end, and the driving mechanism is fixed on the box body 60.

The mounting position of the driving mechanism is not limited to the upper side of the back of the box body 60, and can be placed at other positions; with the display and control assembly 22 removed, the other structures of the lifting shelf are disposed behind the duct panel 62 and are not visible, so that the overall appearance is not compromised.

The specific actions of the lifting shelf are as follows;

1) ascending process

The user adjusts the display and control assembly 22, so that the motor 20 is electrified and rotated to drive the worm 180 to rotate, the large gear 188 drives the wire spool 12 to take up wires through the meshing rotation of the multiple gears, and the first rope 14 and the second rope 16 are gradually shortened, so that the height of the glass shelf 10 is increased;

2) descending process

Similarly, the user adjusts the display and control assembly 22, so that the motor 20 is electrified and rotates reversely to drive the worm 180 to rotate, the bull gear 188 drives the wire spool 12 to pay off through the meshing rotation of the multiple gears, and the first rope 14 and the second rope 16 are gradually lengthened, so that the height of the glass shelf 10 is reduced;

3) hovering at any position

When the user stops adjusting the display and control assembly 22, the motor 20 is powered off and stops rotating, the bull gear 188 rotates in a same way as the descending process under the action of gravity of the glass shelf 10 and objects on the glass shelf, and the bull gear is transmitted to the worm 180 through meshing rotation of the multiple gears, and self-locking can occur because the expansion spiral angle of the worm 180 is smaller than the contact friction angle of the worm gear 180, so that hovering at any position is realized;

4) stroke limiting

The first movable pulley assembly 46 and the second movable pulley assembly 50 move up and down along with the sliding block 422 of the guiding assembly 42, the ferromagnetic body 24 moves vertically at the same time, when the ferromagnetic body 24 approaches the positions of the first sensing point 260 and the second sensing point 262 of the magnetic switch assembly 26, the magnetic switch assembly 26 obtains information, a feedback signal is sent to the display and control assembly 22, and the display and control assembly 22 sends a stop rotation signal of the motor 20, so that the stroke is limited.

The beneficial effects brought by the specific embodiment are as follows:

1. the shelf is automatically adjusted, food does not need to be taken out, and the movable pulley is arranged, so that the adjustment is convenient and labor-saving;

2. the space between the shelves is steplessly adjusted within the adjusting range, and the space utilization rate is high;

3. the shelf driving mechanism is driven by a single motor, has small size, does not occupy storage space, does not influence appearance and has low structural cost;

4. the single motor drive and the rope flexible transmission are adopted, so that the running noise can be effectively controlled.

According to another specific embodiment of the refrigerator provided by the application, a manual lifting shelf is adopted.

The whole lifting shelf comprises a glass shelf 10, a driving mechanism, a first movable pulley assembly 46, a second movable pulley assembly 50, a guide assembly 42, a first fixed pulley assembly 44, a second fixed pulley assembly 48, a first rope 14, a second rope 16 and a rope line pipe 52. The shelf 10 is easy to adjust due to the use of the movable pulley and the reduction gear.

The guide assembly 42 is composed of two parts, namely a guide rail 420 and a sliding block 422, and the sliding block 422 can vertically slide along the guide rail 420; the glass shelf 10, the first movable pulley assembly 46 and the second movable pulley assembly 50 are respectively connected with a sliding block 422 of one guide assembly 42; the guide assembly 42, the first fixed pulley assembly 44 and the second fixed pulley assembly 48 are fixedly connected with the box body 60 respectively.

The first cable 14 is fixedly connected to the first fixed sheave assembly 44 at one end and to the spool 12 at the other end, and passes through the pulleys of the first movable sheave assembly 46 and the first fixed sheave assembly 44 and the cable tube 52 therebetween. The first cord 14 is slidable along the cord tube 52, and the cord tube 52 is fixed to the back of the cabinet 60 and placed in the foam layer.

The second cord 16 is fixedly connected at one end to the second fixed sheave assembly 48 and at the other end to the spool 12, and passes between the second movable sheave assembly 50 and the sheave of the second fixed sheave assembly 48, and a cord tube 52. The second cord 16 is slidable along a cord tube 52, and the cord tube 52 is fixed to the back of the cabinet 60 and placed in the foam layer.

The driving mechanism is composed of a driving knob 32, a fixed seat 40, a sleeve 38, a tension spring 36, a rotating part 34, a wire spool 12, a first gear 300 and a second gear 302, wherein the sleeve 38 is connected with the fixed seat 40, the first gear 300 rotates along with the knob 32, the first gear 300 drives the second gear 302 to rotate, and the tension spring 36, the rotating part 34, the wire spool 12 and the second gear 302 rotate coaxially. The drive mechanism is fixed to the housing 60 and the knob 32 is attached to the housing by means of the fixing 40.

The mounting position of the drive mechanism is not limited to the side of the case 60; the drive mechanism is removed and the other structures of the lifting shelf are all arranged at the rear side of the air duct panel 62 and are invisible, so that the overall appearance is not affected.

The specific actions of the lifting shelf are as follows:

1) ascending process

The user rotates the driving knob 32 to drive the first gear 300 to rotate, the first gear 300 and the second gear 302 are in meshed motion, so that the wire spool 12 is driven to take up wires, and the first rope 14 and the second rope 16 are gradually shortened, so that the height of the glass shelf 10 is increased;

2) descending process

Similarly, the user rotates the driving knob 32 in the opposite direction to drive the first gear 300 to rotate, the first gear 300 and the second gear 302 move in a meshing manner, so as to drive the wire spool 12 to pay off, and as the first rope 14 and the second rope 16 become longer, the height of the glass shelf 10 is reduced;

3) hovering at any position

The user rotating the drive knob 32 to bring the glass shelf 10 to the user's desired height stops the rotating operation, which, due to the weight of the glass shelf 10 and its contents, causes the second gear 302 to rotate in unison with the lowering process, which causes the tensioning spring 36 to tension, increasing the friction between the tensioning spring 36 and the sleeve 38, thereby preventing the glass shelf 10 from lowering and causing it to hover.

The beneficial effects brought by the specific embodiment are as follows:

1. the shelf is automatically adjusted, food does not need to be taken out, and the movable pulley is arranged, so that the adjustment is convenient and labor-saving;

2. the space between the shelves is steplessly adjusted within the adjusting range, and the space utilization rate is high;

3. the lifting shelf is small in structure size, does not occupy storage space, does not influence appearance and is low in structure cost;

4. and the flexible transmission of the rope is adopted, so that the running noise can be effectively controlled.

It is to be understood that the movable pulley is optional and that the first and second cords 14 and 16 may be directly connected to the slider 422, i.e., the movable pulley may be absent or plural; the position of the driving mechanism is not limited to the upper side of the back of the box body 60, and the driving mechanism can be placed in other idle positions; the gear material can be metal, polyformaldehyde or other gear plastics, and can also be metal and plastic for matching use, the gear grade is not limited to the 4-grade gear transmission shown in the example, and can be more than 2 grades; the bull gear 188 may be integral with the spool 12, and the spool 12 may include a plurality of annular wire slots; the driving can be electric or manual.

The technical scheme of the utility model is explained in detail in the above combination with the attached drawing, through the technical scheme of the utility model, promoted the load capacity of shelf effectively, reduced drive arrangement's power or can cancel drive arrangement, saved the space.

In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (18)

1. A lifting shelf, comprising:

a shelf;

a wire spool;

a first rope, one end of which is fixed;

the first movable pulley assembly is connected with one end of the shelf, and the other end of the first rope is wound on the wire spool after passing around the first movable pulley assembly;

a second rope, one end of which is fixed;

the second movable pulley component is connected with the other end of the shelf, the other end of the second rope is wound on the wire spool after passing by the second movable pulley component,

wherein the first and second ropes are lengthened or shortened according to the rotation of the spool.

2. The elevating shelf of claim 1, further comprising:

and the driving mechanism is connected with the wire spool and is used for driving the wire spool to rotate.

3. An elevating shelf according to claim 2,

the drive mechanism includes: a first transmission assembly;

the motor is connected with the first transmission assembly, and the first transmission assembly is further connected with the wire spool.

4. An elevating shelf according to claim 3,

the first transmission assembly includes: a worm connected with a driving shaft of the motor;

a multi-stage gear set, wherein gears at the input ends of the multi-stage gear set are meshed with the worm; and the gears at the output end of the multi-stage gear set are coaxially connected with the wire spool.

5. An elevating shelf according to claim 4,

the multi-stage gear set constructs a speed reducing mechanism.

6. An elevating shelf according to any one of claims 3-5, further comprising:

and the display control assembly is connected with the motor and is configured to control the operation of the motor.

7. The elevating shelf of claim 6, further comprising:

the ferromagnetic body is arranged at least one end of the shelf;

the magnetic switch assembly is arranged adjacent to the shelf, a first induction point and a second induction point which are used for inducing the ferromagnet are arranged on the magnetic switch assembly at intervals, and the magnetic switch assembly is further electrically connected with the display control assembly.

8. An elevating shelf according to claim 2,

the drive mechanism includes: a second transmission assembly;

and the knob is connected with the second transmission assembly, and the second transmission assembly is also connected with the wire spool.

9. An elevating shelf according to claim 8,

the second transmission assembly includes: the first gear is connected with the knob, the second gear is coaxially connected with the wire spool, and the diameter of the first gear is smaller than that of the second gear.

10. An elevating shelf as claimed in claim 8 or 9, wherein the drive mechanism further comprises:

the rotating piece is connected with the wire spool and rotates along with the wire spool;

the tensioning spring is connected with the rotating piece and rotates along with the rotating piece;

a sleeve, the tension spring disposed within the sleeve, the sleeve for limiting expansion of the tension spring.

11. The elevating shelf according to claim 8 or 9, further comprising:

the knob is arranged on one side of the fixing seat, and the driving mechanism is arranged on the other side of the fixing seat.

12. Lifting shelf according to any of claims 1-5 and 8, 9, further comprising:

the guide assembly comprises a guide rail and a sliding block, and the sliding block is slidably arranged on the guide rail;

the two ends of the shelf are respectively provided with one guide component, and the sliding block is connected with the shelf.

13. The elevating shelf of claim 12, further comprising:

one end of the first rope is fixed on the first fixed pulley component;

and one end of the second rope is fixed on the second fixed pulley component.

14. An elevating shelf according to claim 12,

the first movable pulley component is directly connected with the shelf, or the first movable pulley component is connected with the shelf through the sliding block;

the second movable pulley component is directly connected with the shelf, or the second movable pulley component is connected with the shelf through the sliding block.

15. Lifting shelf according to any of claims 1-5 and 8, 9, further comprising:

a rope conduit within which at least a portion of at least one of the first rope and the second rope is disposed; and/or

And a plurality of wire winding grooves are formed in the wire winding disc.

16. A household appliance, characterized in that it comprises:

a box body;

an elevating shelf as defined in any one of claims 1 to 15 provided within said box.

17. Household appliance according to claim 16,

a wind channel panel is arranged in the box body;

at least part of the lifting shelf is arranged at the rear side of the air duct panel.

18. Household appliance according to claim 16,

the household equipment is a refrigerator or a freezer, and the rope line pipe of the lifting shelf is fixedly arranged in the foaming layer on the back of the refrigerator.

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