Lifting assembly, storage device and mobile refrigerator

Abstract

The application discloses a lifting assembly, a storage device and a mobile refrigerator, wherein the lifting assembly comprises a supporting mechanism and a driving mechanism; the supporting mechanism comprises a stand column and a sliding sleeve; the upper ends of the stand column are connected with first steering wheels; the inner wall of the sliding sleeve is connected with two pulley blocks; the pulley block comprises a first movable pulley and a second movable pulley; the driving mechanism comprises a motor and two sets of winding devices; the winding device comprises a winding reel, a first cable and a second cable; the two sets of winding devices are symmetrically distributed at the lower ends of the stand column; the two winding reels are connected to a rotating shaft; the motor is in transmission connection with the rotating shaft; the winding reel is axially and spacedly provided with a first winding groove and a second winding groove; one end of the first cable is wound on the first winding groove; the other end of the first cable is sequentially wound on the first steering wheel and the first movable pulley and is fixed to the stand column; one end of the second cable is wound on the second winding groove; the other end of the second cable is wound on the second movable pulley and is fixed to the stand column.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mobile refrigerators, and in particular to a lifting assembly, a storage device, and a mobile refrigerator. BACKGROUND

[0002] In order to adapt to the development of the Internet of Things, a mobile refrigerator with mobile distribution function needs to be developed. The mobile refrigerator comprises a liftable storage device, a refrigeration device, and a mobile device. The liftable storage device comprises a tray mechanism and a lifting assembly. The tray mechanism is used for placing articles. The lifting assembly can drive the articles to lift. The refrigeration device is used for refrigerating the articles stored on the tray mechanism. The mobile device is used for driving the mobile refrigerator body to move, so as to facilitate the user to take the articles. In the related art, the structure of the lifting assembly is complex, and the reliability is poor, which affects the use experience of the mobile refrigerator. SUMMARY

[0003] The present application aims to at least solve one of the problems in the prior art. To this end, the present application provides a lifting assembly which effectively improves the use reliability.

[0004] The present application also provides a storage device comprising the lifting assembly.

[0005] The present application also provides a mobile refrigerator comprising the storage device.

[0006] The lifting assembly according to the embodiments of the present application comprises a support mechanism and a driving mechanism. The support mechanism comprises a stand and a sliding sleeve. The sliding sleeve is sleeved on the stand and can slide up and down. The upper ends of the stand are connected with first steering wheels. The inner wall of the sliding sleeve is connected with two pulley blocks. The two pulley blocks are distributed on the two sides of the stand. The pulley block comprises a first movable pulley and a second movable pulley. The driving mechanism comprises a motor and two sets of winding devices. The winding device comprises a winding reel, a first cable, and a second cable. The two sets of winding devices are symmetrically distributed on the lower ends of the stand. The two winding reels are connected to a rotating shaft. The motor is in transmission connection with the rotating shaft. The winding reel is axially spaced apart with a first winding groove and a second winding groove. One end of the first cable is wound around the first winding groove and fixed to the winding reel. The other end of the first cable is sequentially wound around the first steering wheel and the first movable pulley and fixed to the stand. One end of the second cable is wound around the second winding groove and fixed to the winding reel. The other end of the second cable is wound around the second movable pulley and fixed to the stand.

[0007] The lifting assembly provided by the embodiment of the present application has at least the following beneficial effects: the winding wheels of the two sets of winding devices are synchronously rotated by the motor, the winding wheels drive the first movable pulley to rise by the first cable, and the first movable pulley drives the sliding sleeve to rise, or the winding wheels drive the second movable pulley to descend by the second cable, and the second movable pulley drives the sliding sleeve to descend, the lifting assembly drives the sliding sleeve to rise and descend by different cables, which is beneficial to improving the reliability of the lifting assembly; in the process of rising of the sliding sleeve, the first cable is wound on the first movable pulley, the first cable provides upward pulling force from both sides of the first movable pulley, the two sets of winding devices apply four pulling forces to the sliding sleeve, which is beneficial to reducing the pulling force borne by one side of the first cable, and the stress of the sliding sleeve is more balanced, the process of rising of the sliding sleeve is stable, and the reliability is high; when the second cable drives the sliding sleeve to descend, the second cable provides downward pulling force from both sides of the second movable pulley, the two sets of winding devices apply four pulling forces to the sliding sleeve, which is beneficial to reducing the pulling force borne by one side of the second cable, and the stress of the sliding sleeve is more balanced, the process of descending of the sliding sleeve is stable and reliable.

[0008] According to the embodiment of the first aspect of the present application, the lower end of the sliding sleeve is provided with a support, the support is provided with a sliding groove, a sliding block is arranged in the sliding groove, at least one of the first movable pulley and the second movable pulley is connected to the sliding block, and a first elastic member is connected to the sliding block to move the first movable pulley and the second movable pulley towards each other.

[0009] According to the embodiment of the first aspect of the present application, the support is provided with one sliding groove, two sliding blocks are arranged in the sliding groove, the first movable pulley is fixed to one of the sliding blocks, the second movable pulley is fixed to the other sliding block, the first elastic member is a tension spring or an elastic cable, and two ends of the first elastic member are respectively connected to one of the sliding blocks.

[0010] According to the embodiment of the first aspect of the present application, the support is provided with two sliding grooves, one sliding block is arranged in each sliding groove, the first movable pulley is fixed to one of the sliding blocks, the second movable pulley is fixed to the other sliding block, the first elastic member is a tension spring or an elastic cable, and two ends of the first elastic member are respectively connected to one of the sliding blocks.

[0011] According to the embodiment of the first aspect of the present application, one sliding groove is arranged at one end of the support, one sliding block is arranged in the sliding groove, the first movable pulley is fixed to the sliding block, the second movable pulley is fixed to the support, the second movable pulley is located at the end of the support away from the sliding groove, the first elastic member is a tension spring or an elastic cable, one end of the first elastic member is connected to the sliding block, and the other end of the first elastic member is connected to the second movable pulley.

[0012] According to the embodiment of the first aspect of the present application, the winding device further comprises two second diverting wheels connected to the column, the second winding groove is located at the end of the winding wheel away from the column, the two second diverting wheels are arranged in a spaced manner and above the winding wheel, the axial direction of the second diverting wheel is perpendicular to the axial direction of the winding wheel, the second winding groove is located at the side of the second diverting wheel away from the column, the second movable pulley is located at the side of the second diverting wheel close to the column, and the second cable is wound around the two second diverting wheels and the second movable pulley in sequence.

[0013] According to the embodiment of the first aspect of the present application, the column is connected with a fixing plate, the fixing plate comprises a fixing part and a mounting part, the mounting part is perpendicular to the fixing part, the fixing part is fixedly connected to the column, and the two second diverting wheels are mounted to the mounting part.

[0014] According to the embodiment of the first aspect of the present application, the driving mechanism further comprises a clutch, the clutch comprises a first connecting sleeve and a second connecting sleeve capable of being engaged with each other, the first connecting sleeve is sleeved on the output shaft of the motor, the second connecting sleeve is fixedly connected to the rotating shaft, the first connecting sleeve is fixed in the circumferential direction of the output shaft and is capable of moving along the output shaft, and a return spring is arranged between the first connecting sleeve and the output shaft to enable the first connecting sleeve and the second connecting sleeve to be engaged.

[0015] According to the embodiment of the first aspect of the present application, the driving mechanism further comprises a shifting piece, the motor is connected with a base, the middle part of the shifting piece is rotationally connected to the base, the outer wall of the first connecting sleeve is provided with a ring groove, and one end of the shifting piece is clamped into the ring groove.

[0016] According to the embodiment of the first aspect of the present application, the driving mechanism further comprises a second elastic member, the middle part of the shifting piece is provided with a rotating sleeve, the outer wall of the rotating sleeve is provided with a first fixing column, the base is provided with a second fixing column, the two ends of the second elastic member are respectively connected to the first fixing column and the second fixing column, and the first fixing column deviates from the connecting line of the second fixing column and the axis of the rotating sleeve.

[0017] According to the embodiment of the second aspect of the present application, the storage device comprises a tray mechanism and the lifting assembly of the first aspect of the embodiment, the tray mechanism comprises a first tray and a second tray, the first tray is connected to the lower end of the sliding sleeve, and the second tray is connected to the middle part of the sliding sleeve.

[0018] According to the embodiment of the third aspect of the present application, the mobile refrigerator comprises the storage device of the second aspect of the embodiment.

[0019] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0020] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or can be learned by practice of the application.

[0021] Figure 1 Overall schematic view of the lifting assembly provided for the embodiments of the application;

[0022] Figure 2 Cross-sectional view of the lifting assembly provided for the embodiments of the application;

[0023] Figure 3 Schematic view of the structure of the lifting assembly when the sliding sleeve is lifted provided for the embodiments of the application;

[0024] Figure 4 Schematic view of the structure of the lifting assembly when the sliding sleeve is lifted provided for the embodiments of the application;

[0025] Figure 5 Schematic view of the structure of the lifting assembly when the sliding sleeve is lifted provided for the embodiments of the application;

[0026] Figure 6 Schematic view of the structure of the lifting assembly when the sliding sleeve is lifted provided for the embodiments of the application;

[0027] Figure 7 Schematic view of the structure of the lifting assembly when the sliding sleeve is lifted provided for the embodiments of the application; Figure 1

[0028] Figure 8 Schematic view of the structure of the lifting assembly when the sliding sleeve is lifted provided for the embodiments of the application;

[0029] Figure 9 Schematic view of the structure of the lifting assembly when the sliding sleeve is lifted provided for the embodiments of the application; Figure 2

[0030] Figure 10 Schematic view of the structure of the lifting assembly when the sliding sleeve is lifted provided for the embodiments of the application;

[0031] Figure 11 Schematic view of the structure of the lifting assembly when the sliding sleeve is lifted provided for the embodiments of the application; Figure 10

[0032] Figure 12 Schematic view of the structure of the lifting assembly when the sliding sleeve is lifted provided for the embodiments of the application;

[0033] Figure 13 Schematic view of the structure of the lifting assembly when the sliding sleeve is lifted provided for the embodiments of the application;​​​

[0034] Figure 14 Structure diagram of torsion spring as the first elastic member of some embodiments of the present application;

[0035] Figure 15 Structure diagram of tension spring as the first elastic member of some embodiments of the present application;

[0036] Figure 16 Structure diagram of compression spring as the first elastic member of some embodiments of the present application;

[0037] Figure 17 Structure diagram of tension spring as the first elastic member of some embodiments of the present application;

[0038] Figure 18 Structure diagram of compression spring as the first elastic member of some embodiments of the present application;

[0039] Figure 19 Structure diagram of motor and clutch of some embodiments of the present application;

[0040] Figure 20 Partial sectional view of driving mechanism of some embodiments of the present application;

[0041] Figure 21 Top view of clutch adjustment of some embodiments of the present application Figure 1 ;

[0042] Figure 22 Top view of clutch adjustment of some embodiments of the present application Figure 2 ;

[0043] Figure 23 Top view of clutch adjustment of some embodiments of the present application Figure 3 ;

[0044] Figure 24 Structure diagram of first locking member and limiting member of lifting assembly of some embodiments of the present application;

[0045] Figure 25 Structure diagram of first locking member of lifting assembly of some embodiments of the present application;

[0046] Figure 26 Sectional view of pressing member and rotating shaft of lifting assembly of some embodiments of the present application;

[0047] Figure 27 Structure diagram of pressing member of lifting assembly of some embodiments of the present application;

[0048] Figure 28 Overall schematic diagram of mobile refrigerator of some embodiments of the present application;

[0049] Figure 29 A cross-sectional view of the mobile refrigerator provided for an embodiment of the present application.

[0050] Reference signs are as follows:

[0051] Lifting assembly 100; stand 110; sliding sleeve 120; support 121; sliding groove 1211; sliding block 1212; first elastic member 1213; cover plate 1214; blocking strip 1215; first movable pulley 122; second movable pulley 123; first deflection wheel 130; motor 140; rotating shaft 150; pressing plane 151; winding wheel 160; first winding groove 161; second winding groove 162; first inhaul cable 170; second inhaul cable 180; second deflection wheel 190; fixing plate 200; first locking member 210; first locking cap 211; first winding portion 212; first locking rib 213; first rotation-stopping plane 214; second locking member 220; pressing member 230; fixing portion 231; pressing groove 232; side plate 233; pressing screw 240; pressing cap 241; shaft sleeve 250; limiting member 260; storage device 300; first tray 310; second tray 320; refrigeration device 400; moving device 500; outer shell 600; clutch 700; first connecting sleeve 710; ring groove 711; second connecting sleeve 720; return spring 730; push piece 740; pushing portion 741; operating portion 742; rotating sleeve 743; second elastic member 750. DETAILED DESCRIPTION

[0052] Embodiments of the present application are described in detail below with reference to examples illustrated in the accompanying drawings, in which the same or similar components have the same or similar designations throughout the several views and have the same or similar functions. The embodiments described below are examples only, and are not intended to limit the present application.

[0053] In the description of the present application, it should be understood that, in relation to orientation description, for example, the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0054] In the description of the present application, if there is a description of first, second, etc. for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance or implying the number of technical features indicated or the sequence of technical features indicated.

[0055] In the description of the present application, the words such as arrangement, installation, connection and the like should be understood in a broad sense unless otherwise explicitly limited, and the skilled in the art can determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0056] The specific structure and function of the lifting assembly of the embodiment of the first aspect of the present application will be further illustrated below in combination with the drawings and the text.

[0057] With reference to Figures 1 to 6 According to the embodiment of the present application, a lifting assembly 100 is provided, comprising a supporting mechanism and a driving mechanism, the supporting mechanism comprising a fixed base, a vertical column 110 and a sliding sleeve 120, the vertical column 110 being fixed in a vertical direction on the fixed base, the sliding sleeve 120 being tubular and matching the shape of the vertical column 110, the sliding sleeve 120 being sleeved on the outer periphery of the vertical column 110 and being capable of sliding up and down, the upper end of the vertical column 110 being connected with one first steering wheel 130 on each side, the lower end of the sliding sleeve 120 being connected with two pulley blocks, each pulley block being composed of a first movable pulley 122 and a second movable pulley 123; the driving mechanism comprising a motor 140 and two sets of winding devices, the two sets of winding devices being distributed on the lower end of the vertical column 110 on both sides, each set of winding device corresponding to one pulley block and one first steering wheel 130, each winding device comprising a winding wheel 160, a first cable 170 and a second cable 180, the winding wheels 160 of the two sets of winding devices sharing one rotating shaft 150, the motor 140 driving the two winding wheels 160 through the rotating shaft 150, the outer wall of the winding wheel 160 being concave to form a first winding groove 161 and a second winding groove 162, the first winding groove 161 and the second winding groove 162 being arranged in an axial direction of the winding wheel 160 and spaced apart, and the second winding groove 162 being located on the side of the winding wheel 160 away from the vertical column 110, one end of the first cable 170 being wound around the first winding groove 161 and fixed to the winding wheel 160, the other end being first upward, then wound around the first steering wheel 130 to turn downward, then wound around the first movable pulley 122 to turn upward, and fixed to the upper part of the vertical column 110; one end of the second cable 180 being wound around the second winding groove 162 and fixed to the winding wheel 160, the other end being first upward, then wound around the second movable pulley 123 to turn downward, and fixed to the lower part of the vertical column 110. One set of winding device is distributed on each side of the vertical column 110, two tension forces are applied to the sliding sleeve 120, the stress of the sliding sleeve 120 is more balanced, and the process of rising and falling is more stable and reliable.

[0058] In operation, the motor 140 rotates to drive the two winding wheels 160 to rotate in a first direction, the second cable 180 wound around the second winding groove 162 is unwound, and the first cable 170 is wound into the first winding groove 161, the first cable 170 is wound to drive the first movable pulley 122 to rise, thereby driving the sliding sleeve 120 to rise; when the motor 140 drives the two winding wheels 160 to rotate in a second direction, the first cable 170 wound around the first winding groove 161 is unwound, and the second cable 180 is wound into the second winding groove 162, thereby driving the second movable pulley 123 to descend, thereby driving the sliding sleeve 120 to descend.

[0059] Since the first cable 170 is wound around the first movable pulley 122, the first cable 170 provides upward tension from both sides of the first movable pulley 122, which is beneficial to reduce the tension borne by the first cable 170 on one side, and the two first cables 170 exert four tensions on the sliding sleeve 120, so that the sliding sleeve 120 rises stably and reliably. Similarly, when the second cable 180 drives the sliding sleeve 120 to descend, the two second cables 180 exert four tensions on the sliding sleeve 120, which is beneficial to reduce the tension borne by the second cable 180 on one side, so that the sliding sleeve 120 is more balanced in stress and descends stably and reliably.

[0060] Referring to Figure 4 and Figure 5 It can be understood that the first movable pulley 122 and the second movable pulley 123 are connected to the first cable 170 and the second cable 180, respectively, and in order to prevent the first cable 170 or the second cable 180 from loosening or even winding during the rising or descending of the sliding sleeve 120, a tensioning mechanism is provided.

[0061] Referring to Figures 7 to 9 , the tensioning mechanism includes a bracket 121, a sliding groove 1211 is provided on the bracket 121, and a sliding block 1212 is arranged in the sliding groove 1211, one sliding block 1212 can be used, the first movable pulley 122 or the second movable pulley 123 is fixed to the sliding block 1212, or two sliding blocks 1212 can be used, the first movable pulley 122 and the second movable pulley 123 are fixed to one sliding block 1212, respectively, the sliding block 1212 provides a sliding space, and the sliding block 1212 is connected to a first elastic member 1213, under the action of the first elastic member 1213, the first movable pulley 122 and the second movable pulley 123 have a tendency to move towards each other, while the tension of the first cable 170 on the first movable pulley 122 and the tension of the second cable 180 on the second movable pulley 123 are in opposite directions, the first elastic member 1213 applies a reverse pre-tightening force, the first movable pulley 122 applies a tensioning force to the first cable 170, and the second movable pulley 123 applies a tensioning force to the second cable 180, so that the first cable 170 and the second cable 180 remain in a tensioning state, preventing loosening and winding problems, and improving the operation stability of the lifting assembly.

[0062] Referring to Figure 10 and Figure 11 , a sliding groove 1211 is arranged on the support 121, two slidable sliding blocks 1212 are arranged in the sliding groove 1211, the first movable pulley 122 is fixed to the upper sliding block 1212, the second movable pulley 123 is fixed to the lower sliding block 1212, the first elastic member 1213 is selected as a tension spring, the two ends of the tension spring are connected to the two sliding blocks 1212 respectively, the tension spring is used to apply a reverse pre-tightening force, the first movable pulley 122 applies a tensioning force to the first pull rope 170, the second movable pulley 123 applies a tensioning force to the second pull rope 180, so that the first pull rope 170 and the second pull rope 180 are kept in a tensioning state, preventing the problems of loosening and winding. As shown in Figure 11 , when the tension of the first pull rope 170 on the first movable pulley 122 or the tension of the second pull rope 180 on the second movable pulley 123 stretches the tension spring, it can help to tension the first pull rope 170 or the second pull rope 180, preventing loosening or winding.

[0063] In addition, referring to Figure 12 , the first elastic member 1213 can also be selected as an elastic pull rope, the two ends of the elastic pull rope are connected to the two sliding blocks 1212 respectively, and the tension spring is used to apply a reverse pre-tightening force; or, referring to Figure 13 , the first elastic member 1213 can also be selected as a compression spring, one compression spring is connected to each sliding block 1212, the two compression springs are distributed on the outer sides of the two sliding blocks 1212 and push the two sliding blocks 1212 to move towards each other, and the compression spring is used to apply a reverse pre-tightening force; or, referring to Figure 14 , the first elastic member 1213 can also be selected as a torsion spring, one torsion spring is connected to each sliding block 1212, the two torsion springs are distributed on the outer sides of the two sliding blocks 1212 and push the two sliding blocks 1212 to move towards each other, and the torsion spring is used to apply a reverse pre-tightening force.

[0064] Referring to Figure 15 , two sliding grooves 1211 are arranged on the support 121, one slidable sliding block 1212 is arranged in each sliding groove 1211, the sliding directions of the two sliding blocks 1212 are consistent, the first movable pulley 122 is fixed to the upper sliding block 1212, the second movable pulley 123 is fixed to the lower sliding block 1212, the first elastic member 1213 is selected as a tension spring, the two ends of the tension spring are connected to the two sliding blocks 1212 respectively, the tension spring is used to apply a reverse pre-tightening force, the first movable pulley 122 applies a tensioning force to the first pull rope 170, the second movable pulley 123 applies a tensioning force to the second pull rope 180, so that the first pull rope 170 and the second pull rope 180 are kept in a tensioning state, preventing the problems of loosening and winding.

[0065] In addition, the first elastic member 1213 can also be selected as an elastic pull rope, the connection mode of the elastic pull rope refers to the tension spring; or, referring to Figure 16 The first elastic member 1213 can also be selected as a compression spring. Each sliding block 1212 is connected with a compression spring. The two compression springs are arranged outside the two sliding blocks 1212 and push the two sliding blocks 1212 to move towards each other. The reverse pre-tightening force is applied by the compression spring. Alternatively, the first elastic member 1213 can also be selected as a torsion spring. The connection mode of the torsion spring is referred to the compression spring.

[0066] Referring to Figure 17 A sliding groove 1211 is arranged on the support 121. A slidable sliding block 1212 is arranged in the sliding groove 1211. The first movable pulley 122 is fixed to the sliding block 1212. The second movable pulley 123 is fixed to the support 121. The first elastic member 1213 is selected as a tension spring. One end of the tension spring is connected to the sliding block 1212. The other end of the tension spring is connected to the second movable pulley 123 or the support 121. The reverse pre-tightening force is applied by the tension spring. The first movable pulley 122 applies the tensioning force to the first pull cable 170. The second movable pulley 123 applies the tensioning force to the second pull cable 180. The first pull cable 170 and the second pull cable 180 are kept in the tensioning state. The problems of loosening and winding are prevented.

[0067] In addition, the first elastic member 1213 can also be selected as an elastic pull cable. The connection mode of the elastic pull cable is referred to the tension spring. Alternatively, Figure 18 The first elastic member 1213 can also be selected as a compression spring. The sliding block 1212 is connected with a compression spring. One end of the compression spring is connected to the sliding block 1212. The other end of the compression spring is connected to the end of the support 121 away from the second movable pulley 123. The compression spring pushes the sliding block 1212 to move towards the second movable pulley 123. The reverse pre-tightening force is applied by the compression spring. Alternatively, the first elastic member 1213 can also be selected as a torsion spring. The connection mode of the torsion spring is referred to the compression spring.

[0068] Referring to Figures 9 to 11 The sliding groove 1211 on the support 121 penetrates the support 121. A cover plate 1214 is installed on the outer wall of the support 121. The cover plate 1214 covers the sliding groove 1211. In order to facilitate the sliding of the sliding block 1212, the lubricating grease is usually applied on the sliding block 1212. The cover plate 1214 plays a protective role to protect the lubricating grease. The cover plate 1214 is fixed to the support 121 by screws. The cover plate 1214 can be disassembled to check the sliding block 1212 or add lubricating grease. The operation is convenient. In order to limit the sliding block 1212, the blocking strip 1215 can be arranged in the sliding groove 1211. The blocking strip 1215 is located on the side of the sliding groove 1211 close to the column 110. The blocking strip 1215 and the cover plate 1214 cooperate to clamp the sliding block 1212. The sliding block 1212 is prevented from falling out. The structure is simple and reliable.

[0069] In order to facilitate the assembly and debugging of the driving device, the driving device is provided with a clutch 700. Referring to Figure 19 and Figure 20The clutch 700 comprises a first connecting sleeve 710 and a second connecting sleeve 720, the first connecting sleeve 710 and the second connecting sleeve 720 have teeth capable of engaging each other, the power transmission is realized by the engagement of the two, and the power is disconnected by the separation of the two. The first connecting sleeve 710 is sleeved on the output shaft of the motor 140, the second connecting sleeve 720 is sleeved on the rotating shaft 150 of the winding wheel 160, the first connecting sleeve 710 is circumferentially fixed with the output shaft of the motor 140 and can move axially relative to the output shaft, the second connecting sleeve 720 is fixedly connected with the rotating shaft 150, therefore, when the first connecting sleeve 710 and the second connecting sleeve 720 engage, the power can be transmitted, the motor 140 drives the winding wheel 160 to rotate; when it is necessary to separate, the first connecting sleeve 710 is pushed to move axially along the output shaft 201, so that the first connecting sleeve 710 and the second connecting sleeve 720 are separated, and the power transmission is disconnected.

[0070] One end surface of the first connecting sleeve 710 is provided with an axial accommodating groove, a return spring 730 is arranged in the accommodating groove, two ends of the return spring 730 are connected with the first connecting sleeve 710 and the output shaft of the motor 140 respectively, the return spring 730 is in a compressed state, therefore, the return spring 730 pushes the first connecting sleeve 710 to move towards the second connecting sleeve 720, so that the first connecting sleeve 710 and the second connecting sleeve 720 remain engaged, and the clutch 700 remains in a state of transmitting power. When operating, the first connecting sleeve 710 is pushed away from the second connecting sleeve 720 to disconnect the clutch 700, which facilitates the assembly and debugging of the driving device, especially the first pull cable 170 and the second pull cable 180. After the first connecting sleeve 710 is loosened, it is automatically reset under the action of the return spring 730, which is convenient to operate.

[0071] In order to facilitate operation, a push piece 740 is arranged on the base of the motor 140, the middle part of the push piece 740 is rotationally connected to the base, so that the push piece 740 has a rotating function, one end of the push piece 740 is a pushing part 741, the other end of the push piece 740 is an operating part 742, an annular groove 711 is arranged on the outer wall of the first connecting sleeve 710, the pushing part 741 is clamped into the annular groove 711, the push piece 740 is pushed by the pushing part 741 to move axially along the output shaft 201 by operating the operating part 742, so as to realize the separation of the first connecting sleeve 710 and the second connecting sleeve 720.

[0072] It can be understood that the dial 740 has a first state and a second state corresponding to the use state of the clutch 700, the first state of the dial 740 corresponds to the engagement of the first connecting sleeve 710 and the second connecting sleeve 720, the dial 740 does not exert force on the first connecting sleeve 710, and the clutch 700 can transmit power; the second state of the dial 740 corresponds to the disengagement of the first connecting sleeve 710 and the second connecting sleeve 720, the dial 740 exerts force on the first connecting sleeve 710, and keeps the first connecting sleeve 710 and the second connecting sleeve 720 disengaged, the clutch 700 cuts off the power transmission, facilitating the assembly and debugging of the lifting assembly. In order to make the dial 740 stable in the first state or the second state, a second elastic member 750 is arranged on the base to keep the dial 740 in the first state or the second state.

[0073] With reference to Figures 21 to 23 A rotating sleeve 743 is arranged at the middle part of the dial 740, and a pin shaft is arranged on the base, the rotating sleeve 410 is sleeved on the pin shaft, and the rotating function of the dial 740 is realized. A first fixing column is arranged on the outer wall of the rotating sleeve 743, a second fixing column is arranged on the base, and a distance is reserved between the second fixing column and the pin shaft. The second elastic member 750 is a tension spring, one end of the tension spring is connected to the first fixing column, the other end of the tension spring is connected to the second fixing column, and the first fixing column deviates from the axis center line of the second fixing column and the rotating sleeve 743. It can be understood that the first fixing column changes position following the rotation of the dial 740, when the first fixing column is located on the axis center line of the second fixing column and the rotating sleeve 743, the distance between the first fixing column and the second fixing column is maximum, that is, the tension spring is in the most stretched position.

[0074] As shown in Figure 21 , the dial 740 is in the first state, the tension spring is in the non-stretched state, and the dial 740 keeps the first state; as shown in Figure 5 , the dial 740 is rotated, the first fixing column rotates following the dial 740, wherein the first fixing column passes through the axis center line of the second fixing column and the rotating sleeve 743, the tension spring reaches the most stretched state, and then the contraction force of the tension spring drives the dial 740 to continue to rotate; as shown in Figure 6 , the dial 740 is in the second state, the dialing part 741 of the dial 740 pushes the first connecting sleeve 710 and the second connecting sleeve 720 to keep disengaged, the clutch 700 is in the disengaged state, and the dial 740 keeps in the second state under the action of the tension spring, freeing the hands of the operator, facilitating the assembly, debugging and other operations.

[0075] With reference to Figures 2 to 5It can be understood that, since the first winding groove 161 is arranged spaced apart from the first winding groove 161, the second winding groove 162 is located at one end of the winding wheel 160 away from the stand 110, each winding device further comprises two second deflection wheels 190, the two second deflection wheels 190 are arranged spaced apart from top to bottom and located above the winding wheel 160, the axial direction of the second deflection wheel 190 is perpendicular to the axial direction of the winding wheel 160, the second winding groove 162 is located at one side of the second deflection wheel 190, and the second movable pulley 123 is located at the other side of the second deflection wheel 190. The second cable 180 is unwound from the second winding groove 162, and then passes through the two second deflection wheels 190 and the second movable pulley 123 in sequence. The two second deflection wheels 190 deflect the second cable 180 so that the second cable 180 unwound from the second winding groove 162 is aligned with the groove on the outer wall of the second movable pulley 123, which can effectively prevent the second cable 180 from falling off due to excessive deviation of the relative position between the second winding groove 162 and the second movable pulley 123.

[0076] It should be noted that the sizes of the two second movable pulleys 123 can be the same or different, and in use, appropriate changes can be made according to specific needs.

[0077] In addition, a guide wire loop structure similar to a fishing rod can also be used to guide the second cable 180, which can meet the requirement of changing the orientation.

[0078] Referring to Figure 2 , Figure 4 and Figure 5 It can be understood that the stand 110 is connected with a fixing plate 200, the fixing plate 200 comprises a connecting portion and a mounting portion, the mounting portion is perpendicular to the connecting portion, the upper and lower ends of the connecting portion are fixed to the stand 110 by fasteners, and the outer wall of the connecting portion is attached to the outer wall of the stand 110, which is beneficial to improve the reliability of the fixing and can also save space. The two second deflection wheels 190 are mounted on the upper and lower ends of the mounting portion of the fixing plate 200, and the two second deflection wheels 190 are fixed stably and reliably.

[0079] Referring to Figure 24 and Figure 25 It can be understood that the first cable 170 is fixed to the upper part of the stand 110 by the first locking member 210, the first locking member 210 comprises a first locking cap 211, when fixing the first cable 170, the end of the first cable 170 is placed between the first locking cap 211 and the stand 110, and the first locking member 210 is fixed to the stand 110 by fasteners. The wall surface of the first locking cap 211 and the stand 110 can lock the end of the first cable 170, the first cable 170 is not easy to fall off, the reliability of the operation of the lifting assembly 100 is improved, and the user's use experience is improved.

[0080] Referring to Figure 24 and Figure 25 It can be understood that the first locking member 210 further comprises a first rope winding portion 212, and the first locking cap 211 is located at one end of the first rope winding portion 212 away from the column 110. In the process of fixing the first cable 170, the end portion of the first cable 170 is first wound on the first rope winding portion 212, and then the first locking member 210 is fixed on the column 110 by using the fastener, so that the first locking cap 211 is attached to and compresses the first cable 170 wound on the first rope winding portion 212, thereby facilitating to improve the reliability of the fixing of the first cable 170.

[0081] Referring to Figure 25 It can be understood that, in order to further improve the reliability of the fixing of the first cable 170, a first locking rib 213 can be arranged on the wall surface of the first locking cap 211 facing the first rope winding portion 212. The first locking rib 213 extends in the radial direction of the first locking cap 211. In the process of fixing the first cable 170, the end portion of the first cable 170 is first wound on the first rope winding portion 212, and then the first locking member 210 is fixed on the column 110 by using the fastener. The first locking cap 211 compresses the first cable 170 wound on the first rope winding portion 212, and the first locking rib 213 compresses the first cable 170 in the radial direction of the first locking cap 211.

[0082] Referring to Figure 25 It can be understood that a plurality of first locking ribs 213 can be arranged on the first locking cap 211. The plurality of first locking ribs 213 are arranged in a circumferential direction on the first locking cap 211. The plurality of first locking ribs 213 compress the first cable 170 from different directions, so that the first cable 170 is not easy to fall off.

[0083] Referring to Figure 24 And Figure 25 It can be understood that each first locking rib 213 is concave at one end close to the first rope winding portion 212 to form a first wire receiving groove in a ring shape. The other end of the first locking rib 213 away from the first rope winding portion 212 can be regarded as a claw hook. When the first cable 170 is wound on the first rope winding portion 212, at least part of the first cable 170 is received in the first wire receiving groove. The claw hook at the other end of the first locking rib 213 away from the first rope winding portion 212 binds the first cable 170, thereby preventing the first cable 170 wound on the first rope winding portion 212 from being scattered.

[0084] It can be understood that each second locking rib is concave at one end close to the second rope winding portion to form a second wire receiving groove in a ring shape. The other end of the second locking rib away from the second rope winding portion can be regarded as a claw hook. When the second cable 180 is wound on the second rope winding portion, at least part of the second cable 180 is received in the second wire receiving groove. The claw hook at the other end of the second locking rib away from the second rope winding portion binds the second cable 180, thereby preventing the second cable 180 wound on the second rope winding portion from being scattered.

[0085] With reference to Figure 24 and Figure 25 It can be understood that two adjacent first locking ribs 213 define a first access channel, and the width of the first access channel is greater than the diameter of the first cable 170 along the circumference of the first locking cap 211. In the process of fixing the first cable 170, after the end of the first cable 170 is wound around the first winding part 212, the first cable 170 extends from the first access channel, preventing the first cable 170 from extending from the first locking rib 213, and the phenomenon that the elevation of the first locking cap 211 leads to poor compression effect, thereby improving the reliability of the fixing.

[0086] With reference to Figure 25 It can be understood that the first winding part 212 is columnar, and the outer wall of the first winding part 212 is provided with a first rotation-stopping plane 214. The upper part of the stand 110 is provided with a first mounting hole matched with the shape of the first winding part 212, and the first winding part 212 is mounted in the first mounting hole. In the process of fixing the first cable 170, after the end of the first cable 170 is wound around the first winding part 212, the first winding part 212 is inserted into the first mounting hole, and then fixed by using a fastener. At this time, the first rotation-stopping plane 214 is clamped on the inner wall of the first mounting hole, so that even if the first cable 170 generates a pulling force along the circumference of the first locking part 210, the first locking part 210 will not rotate.

[0087] With reference to Figure 1 , Figure 3 and Figure 5 It can be understood that the second cable 180 is fixed to the lower part of the stand 110 by the second locking part 220. The second locking part 220 includes a second locking cap. In the process of fixing the second cable 180, the end of the second cable 180 is placed between the second locking cap and the stand 110, and the second locking part 220 is fixed on the stand 110 by using a fastener. The second locking cap cooperates with the wall surface of the stand 110 to lock the end of the second cable 180, so that the second cable 180 is not easy to fall off, thereby improving the reliability of the operation of the lifting assembly 100 and enhancing the user experience.

[0088] With reference to Figure 1 , Figure 3 and Figure 5 It can be understood that the second locking part 220 further includes a second winding part, and the second locking cap is located at one end of the second winding part. In the process of fixing the second cable 180, the end of the second cable 180 is first wound around the second winding part, and then the second locking part 220 is fixed on the stand 110 by using a fastener, so that the second compression cap 241 is in close contact with and compresses the second cable 180 wound around the second winding part, thereby improving the reliability of the fixing of the second cable 180.

[0089] With reference to Figure 1 , Figure 3 and Figure 5 , it can be understood that, in order to further improve the reliability of the fixing of the second cable 180, the second locking cap can be protruded towards the wall surface of the second winding portion to form a second locking rib, the second locking rib locks the second cable 180, in the process of fixing the second cable 180, the end portion of the second cable 180 is wound on the second winding portion, and then the second locking member 220 is fixed on the stand column 110 by using the fastener, the second locking cap is attached to the second cable 180 wound on the second winding portion, and the second locking rib is pressed against the second cable 180 in the radial direction of the second locking cap.

[0090] With reference to Figure 1 , Figure 3 and Figure 5 , it can be understood that the second locking cap can be provided with a plurality of second locking ribs, the plurality of second locking ribs are arranged in a circumferential direction on the second pressing cap 241, and the plurality of second locking ribs press the second cable 180 from different directions, so that the second cable 180 is not easy to fall off.

[0091] With reference to Figure 1 , Figure 3 and Figure 5 , it can be understood that a second access channel is defined between two adjacent second locking ribs, the width of the second access channel is greater than the diameter of the second cable 180 in the circumferential direction of the second locking cap, in the process of fixing the second cable 180, after the end portion of the second cable 180 is wound on the second winding portion, the second cable 180 extends out of the second access channel, preventing the second cable 180 from extending out of the second locking rib, and the phenomenon that the pressing effect of the second locking rib is poor due to the height difference is prevented, which is beneficial to improve the reliability of the fixing.

[0092] With reference to Figure 1 , Figure 3 and Figure 5 , it can be understood that the second winding portion is columnar, the outer wall of the second winding portion is provided with a second rotation-stopping plane, the upper portion of the stand column 110 is provided with a second mounting hole matched with the shape of the second winding portion, and the second winding portion is mounted in the second mounting hole, in the process of fixing the second cable 180, after the end portion of the second cable 180 is wound on the second winding portion, the second winding portion is inserted into the second mounting hole, and then the second winding portion is fixed by using the fastener, at this time, the second rotation-stopping plane is clamped on the inner wall of the second mounting hole, so that even if the second cable 180 generates a pulling force in the circumferential direction of the second locking member 220, the second locking member 220 will not rotate.

[0093] It should be noted that the structure of the first locking member 210 and the second locking member 220 can be the same or different, and the specific structure of the first locking member 210 and the second locking member 220 can be changed according to actual needs.

[0094] With reference to Figure 2 , Figure 4 and Figure 24 It can be understood that the column 110 is connected with two limit members 260, one of which is located above the second locking member 220, and the other is located below the first locking member 210. The inner wall of the sliding sleeve 120 is provided with a protruding stop block, which is located between the two limit members 260 to limit the movement range of the sliding sleeve 120, preventing the sliding sleeve 120 from being separated from the column 110.

[0095] It should be noted that the limit member 260 includes a mounting plate and a limiting piece, and the limiting piece has a gap with the mounting plate. The limiting piece 260 can block the stop block on the sliding sleeve 120 to limit the sliding sleeve 120. The first and second cables 170 and 180 are arranged in the gap. The side wall of the mounting plate towards the limiting piece is provided with a boss for supporting the first and second cables 170 and 180, so that the first cable 170 is aligned with the middle part of the first movable pulley 122.

[0096] With reference to Figures 2 to 5 It can be understood that the first locking member 210 and the second locking member 220 can be fixed on the winding wheel 160 by a pressing member 230.

[0097] With reference to Figure 5 , Figure 26 and Figure 27 It can be understood that the winding wheel 160 is connected with a rotating shaft 150, and the pressing member 230 includes a fixed part 231, both sides of the fixed part 231 are provided with a pressing groove 232. When fixing the first and second cables 170 and 180, the ends of the first and second cables 170 and 180 are wound around one pressing groove 232 respectively, and then the fixed part 231 of the pressing member 230 is fixed on the rotating shaft 150 by the pressing screw 240. The bottom wall of the pressing groove 232 cooperates with the outer wall of the rotating shaft 150 to press the first and second cables 170 and 180, and then the first cable 170 is wound around the first winding groove 161, and the second cable 180 is wound around the second winding groove 162. By a pressing member 230, the first and second cables 170 and 180 can be fixed, which is convenient to operate and simple and reliable in fixing.

[0098] With reference to Figure 26 and Figure 27It can be understood that the pressing member 230 further comprises side plates 233, and the side plates 233 are connected to both sides of the fixed part 231. The connection between the side plates 233 and the fixed part 231 is concave to form a pressing groove 232 surrounding the pressing member 230. When the first cable 170 and the second cable 180 are arranged in one pressing groove 232 respectively, the side plates 233 on both sides of the fixed part 231 can block the first cable 170 and the second cable 180, preventing the first cable 170 and the second cable 180 from sliding out from the side of the pressing member 230. In addition, the pressing groove 232 is arranged around the pressing member 230, which can better accommodate the first cable 170 and the second cable 180 arranged in the pressing groove 232, and is conducive to saving space.

[0099] With reference to Figure 26 and Figure 27 It can be understood that the side plates 233 of the pressing member 230 extend towards the rotating shaft 150 and surround part of the rotating shaft 150. The side plates 233 are provided with arc surfaces towards the side wall of the rotating shaft 150. When the pressing member 230 is fixed on the rotating shaft 150 by the pressing screw 240, the gap between the arc surfaces of the side plates 233 and the outer wall surface of the rotating shaft 150 is smaller than the width of the first cable 170 and the second cable 180. The arc surfaces of the side plates 233 and the outer wall surface of the rotating shaft 150 cooperate to limit the first cable 170 and the second cable 180 in the pressing groove 232, preventing the first cable 170 or the second cable 180 from sliding out from the gap between the arc surfaces of the side plates 233 and the outer wall surface of the rotating shaft 150.

[0100] It should be noted that the arc surfaces on the two side plates 233 also have a positioning installation function. When fixing the first cable 170 and the second cable 180, the ends of the first cable 170 and the second cable 180 are arranged in one pressing groove 232 respectively, and then the pressing member 230 is placed on the rotating shaft 150, and the arc surfaces on the side plates 233 and the outer wall of the rotating shaft 150 are used for positioning, and then the fixed part 231 is fixed by the pressing screw 240.

[0101] With reference to Figure 26 and Figure 27 It can be understood that the wall surface of the rotating shaft 150 towards the pressing member 230 is provided with a horizontally arranged pressing plane 151. When fixing the first cable 170 and the second cable 180, the ends of the first cable 170 and the second cable 180 are arranged in one pressing groove 232 respectively, and then the pressing member 230 is placed on the rotating shaft 150, so that the first cable 170 and the second cable 180 arranged in the pressing groove 232 abut against the pressing plane 151 of the rotating shaft 150, and then the fixed part 231 is fixed by the pressing screw 240. The pressing member 230 cooperates with the pressing plane 151 to press the first cable 170 and the second cable 180, which is conducive to improving the reliability of the pressing of the first cable 170 and the second cable 180.

[0102] With reference to Figure 26 It can be understood that the compression screw 240 comprises a threaded stud and a compression cap 241 arranged at the end of the threaded stud, the compression screw 240 passes through the middle of the fixing part 231 of the compression part 230, and the width of the compression cap 241 extends to the compression groove 232, when the fixing part 231 is fixed by the compression screw 240, the compression cap 241 of the compression screw 240 can compress the first cable 170 and the second cable 180 from the upper side of the compression part 230, which is conducive to improving the reliability of compression.

[0103] It should be noted that the winding wheel 160, the compression part 230, the first cable 170 and the second cable 180 can be defined as a cable fixing mechanism, which can not only be applied to the lifting assembly 100 provided in the embodiment of the application, but also be applied to other similar mechanisms.

[0104] With reference to Figures 1 to 6 It can be understood that the side wall of the winding wheel 160 is provided with a first threading hole communicating with the first winding groove 161, the position of the first threading hole can be close to the bottom wall of the first winding groove 161, and the first cable 170 can directly pass through the first threading hole to reach the first winding groove 161 without winding around the side wall of the winding wheel 160. During installation, one end of the first cable 170 is fixed on the rotating shaft 150 by the compression part 230, the other end of the first cable 170 passes through the first threading hole to reach the first winding groove 161, and then is wound around the first winding groove 161, the first deflection wheel 130 and the first movable pulley 122 in sequence, and finally is locked at the upper part of the stand column 110 by the first locking part 210.

[0105] With reference to Figures 1 to 6 It can be understood that the side wall of the winding wheel 160 is provided with a second threading hole communicating with the second winding groove 162, the position of the second threading hole can be close to the bottom wall of the second winding groove 162, and the second cable 180 passes through the second threading hole to reach the second winding groove 162 without winding around the side wall of the winding wheel 160. During installation, one end of the second cable 180 is fixed on the rotating shaft 150 by the compression part 230, the other end of the second cable 180 passes through the second threading hole to reach the second winding groove 162, and then is wound around the second winding groove 162 and the second movable pulley 123, and finally is locked at the lower part of the stand column 110 by the second locking part 220.

[0106] With reference to Figure 2It can be understood that the column 110 is provided with a mounting hole, two shaft sleeves 250 are arranged in the mounting hole, the rotating shaft 150 is arranged through the two shaft sleeves 250 and can rotate, the shaft sleeve 250 can prevent the rotating shaft 150 from directly contacting the column 110, avoid the abrasion of the column 110 caused by the rotation of the rotating shaft 150, and the shaft sleeve 250 extends along the rotating shaft 150 in the axial direction to surround part of the rotating shaft 150, so as to protect the rotating shaft 150 and improve the service life.

[0107] With reference to Figure 28 and Figure 29 The embodiment of the present application also provides a mobile refrigerator, which comprises a shell 600, a liftable storage device 300, a refrigeration device 400 and a moving device 500, the liftable storage device 300 comprises a tray mechanism and a lifting assembly 100, the tray mechanism is used for placing articles, the lifting assembly 100 can drive the articles to lift, the refrigeration device 400 is used for refrigerating the articles stored on the tray mechanism, and the moving device 500 is used for driving the body of the intelligent mobile refrigerator to move, so as to facilitate the user to take the articles.

[0108] The liftable storage device 300 has all the beneficial effects of the lifting assembly 100 provided by the embodiment of the present application, the tray mechanism further comprises a first tray 310 and a second tray 320, the first tray 310 is fixed at the lower end of the sliding sleeve 120, the second tray 320 is fixed at the middle part of the sliding sleeve 120, the first tray 310 and the second tray 320 can simultaneously store articles, and the heights of the first tray 310 and the second tray 320 are different, so as to adapt to the heights of different food or beverage packages, and the user experience is improved.

[0109] The above embodiments are described in detail in combination with the drawings, and the above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application, and the present application is not limited to the above embodiments, and various changes can be made within the knowledge range of the ordinary skilled in the art without departing from the purpose of the present application.

Claims

1. Lifting assembly, characterized in that, include: The support mechanism includes a column and a sliding sleeve. The sliding sleeve is mounted on the column and can slide up and down. The upper end of the column is connected to a first steering wheel on both sides. The lower end of the inner wall of the sliding sleeve is connected to two pulley groups. The two pulley groups are distributed on both sides of the column. The pulley groups include a first movable pulley and a second movable pulley. A driving mechanism, comprising a motor and two sets of winding devices, wherein the winding devices comprise a winding wheel, a first cable and a second cable, the two sets of winding devices being symmetrically distributed on both sides of the lower end of the column, the two winding wheels being connected to a rotating shaft, the motor being in transmission connection with the rotating shaft, the winding wheel being provided with a first winding groove and a second winding groove at intervals along the axial direction, one end of the first cable being wound around the first winding groove and fixed to the winding wheel, the other end being wound around the first steering wheel and the first movable pulley in sequence and fixed to the column, one end of the second cable being wound around the second winding groove and fixed to the winding wheel, the other end being wound around the second movable pulley and fixed to the column; A bracket is provided at the lower end of the sliding sleeve, and the bracket is provided with a sliding groove. A slider is installed in the sliding groove. At least one of the first movable pulley and the second movable pulley is connected to the slider. The slider is connected to a first elastic member to enable the first movable pulley and the second movable pulley to move toward each other.

2. The lifting assembly according to claim 1, characterized in that: The bracket is provided with a slide groove, and two sliders are installed in the slide groove. The first movable pulley is fixed to one of the sliders, and the second movable pulley is fixed to the other slider. The first elastic member is a tension spring or an elastic cable, and the two ends of the first elastic member are respectively connected to one of the sliders.

3. The lifting assembly according to claim 1, wherein: The bracket is provided with two slide grooves, each of which is provided with a slider, the first movable pulley is fixed to one of the sliders, the second movable pulley is fixed to the other slider, the first elastic member is a tension spring or an elastic cable, and the two ends of the first elastic member are respectively connected to one of the sliders.

4. The lifting assembly according to claim 1, wherein: A slide groove is provided at one end of the bracket, a slider is installed in the slide groove, the first movable pulley is fixed to the slider, the second movable pulley is fixed to the bracket, the second movable pulley is located at one end of the bracket away from the slide groove, the first elastic member is a tension spring or an elastic cable, one end of the first elastic member is connected to the slider, and the other end is connected to the second movable pulley.

5. The lifting assembly according to claim 1, wherein: The winding device also includes two second steering wheels, the two second steering wheels are connected to the column, the second winding groove is located at the end of the winding wheel away from the column, the two second steering wheels are arranged at intervals and located above the winding wheel, the axial direction of the second steering wheel is perpendicular to the axial direction of the winding wheel, the second winding groove is located on the side of the second steering wheel away from the column, the second movable pulley is located on the side of the second steering wheel close to the column, and the second cable passes around the two second steering wheels and the second movable pulley in sequence.

6. The lifting assembly according to claim 5, characterized in that: The column is connected to a fixing plate, which includes a fixing portion and a mounting portion. The mounting portion is perpendicular to the fixing portion. The fixing portion is fixedly connected to the column, and the two second steering wheels are mounted on the mounting portion.

7. The lifting assembly according to claim 1, wherein: The driving mechanism also includes a clutch, which includes a first connecting sleeve and a second connecting sleeve that can engage with each other, the first connecting sleeve is sleeved on the output shaft of the motor, and the second connecting sleeve is fixedly connected to the rotating shaft. The first connecting sleeve is circumferentially fixed to the output shaft and can move along the output shaft, and a return spring is provided between the first connecting sleeve and the output shaft to enable the first connecting sleeve and the second connecting sleeve to engage with each other.

8. The lifting assembly according to claim 7, wherein: The driving mechanism further includes a paddle, the motor is connected to a base, the middle portion of the paddle is rotatably connected to the base, an annular groove is provided on the outer wall of the first connecting sleeve, and one end of the paddle is engaged in the annular groove.

9. The lifting assembly according to claim 8, characterized in that: The driving mechanism also includes a second elastic member, a rotating sleeve is provided in the middle of the paddle, a first fixed column is provided on the outer wall of the rotating sleeve, and a second fixed column is provided on the base. The two ends of the second elastic member are respectively connected to the first fixed column and the second fixed column, and the first fixed column deviates from the axial line connecting the second fixed column and the rotating sleeve.

10. A storage device, characterized in that: It comprises a tray mechanism and a lifting assembly as claimed in any one of claims 1 to 9, wherein the tray mechanism comprises a first tray and a second tray, the first tray is connected to the lower end of the sliding sleeve, and the second tray is connected to the middle of the sliding sleeve.

11. Mobile refrigerator, characterized in that: Comprising the storage device according to claim 10.

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