Refrigerator having a liftable shelf

Abstract

The application discloses a refrigerator with liftable shelves, comprising a box body and shelves, the bottom of the shelves is provided with a rack and is slidably arranged in the box body; a first driving assembly is arranged on the box body, a lifting piece is liftable arranged on the first driving assembly and is driven by the first driving assembly, a support is reversibly arranged on the lifting piece, a second driving assembly is arranged on the lifting piece and is connected with the support, the second driving assembly can drive the support to reverse, a first transmission gear is rotatably arranged on the support and can reverse with the support, a third driving assembly is arranged on one side of the box body, when the support is reversed to be horizontal and corresponds to the shelves, the first transmission gear is engaged with the rack and the third driving assembly at the same time, the third driving assembly can drive the first transmission gear to rotate, and the first transmission gear can drive the shelves to move to the support. In the application, each driving assembly is used to control the shelves to move to the support and control the support to descend, so that children or disabled people can conveniently take the articles on the shelves.

Description

Technical Field

[0001] This invention relates to the field of refrigerator technology, and in particular to a refrigerator with a liftable shelf. Background Technology

[0002] Refrigerators typically have multiple shelves for storing items, and the height of these shelves varies. However, most refrigerators are designed for adult height, making it very inconvenient for children or people with disabilities to retrieve items from the shelves on their own.

[0003] Therefore, existing technologies still need to be improved and enhanced. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a refrigerator with a height-adjustable shelf, which aims to solve the problem that most refrigerators in the prior art are designed for adult height, making it very inconvenient for children or disabled people to retrieve items from the shelves inside the refrigerator alone.

[0005] The technical solution adopted by this invention to solve the technical problem is as follows:

[0006] In a first aspect, embodiments of the present invention provide a refrigerator with a liftable shelf, comprising:

[0007] The box body and the shelf, wherein the shelf is slidably disposed in the box body and the bottom of the shelf is provided with a toothed rack;

[0008] The first drive assembly, the lifting component, and the bracket are provided. The first drive assembly is disposed on the housing. The lifting component is elliptical and disposed on the first drive assembly and driven by the first drive assembly. The bracket is flip-mounted on the lifting component. When the bracket is flipped to a horizontal position, part of the bracket is located outside the housing and the bracket is misaligned with the shelf.

[0009] A second drive assembly is disposed on the lifting member and connected to the bracket, for driving the bracket to rotate around the lifting member;

[0010] The first transmission gear is rotatably mounted on the bracket and can rotate around the lifting member along with the bracket.

[0011] The third drive assembly is located on one side of the housing. When the bracket is flipped to a horizontal position and raised or lowered to correspond with the shelf, the first transmission gear simultaneously meshes with the rack and the third drive assembly. The third drive assembly is used to drive the first transmission gear to rotate and, through the first transmission gear, move the shelf onto the bracket.

[0012] As a further improved technical solution, the first drive assembly includes a first lead screw motor and a second lead screw motor. The first lead screw motor and the second lead screw motor are respectively vertically arranged on the outer sides of opposite sides of the housing. The opposite sides of the housing are respectively provided with a first sliding groove and a second sliding groove. The lifting component is located inside the housing. One end of the lifting component extends out of the first sliding groove and is sleeved on the lead screw of the first lead screw motor, and the other end extends out of the second sliding groove and is sleeved on the lead screw of the second lead screw motor. The bracket is rotatably mounted on the lifting component. The first lead screw motor and the second lead screw motor are used to synchronously drive the lifting component to move up and down along the first sliding groove and the second sliding groove.

[0013] As a further improved technical solution, the lifting component includes a first connecting rod, a first sleeve, and a second sleeve. The first sleeve and the second sleeve are respectively provided with internal threads. The first sleeve is sleeved on the lead screw of the first lead screw motor and threadedly connected. The second sleeve is sleeved on the lead screw of the second lead screw motor and threadedly connected. The first connecting rod is located in the housing. One end of the first connecting rod passes through the first sliding groove and is connected to the first sleeve, and the other end passes through the second sliding groove and is connected to the second sleeve. The bracket is sleeved on the first connecting rod.

[0014] As a further improved technical solution, the bracket includes a rotating shaft, a second connecting rod, a first connecting member, a second connecting member, and a support frame for supporting the shelf; the rotating shaft is sleeved on the first connecting rod, the support frame is U-shaped, the open side of the support frame is fixedly connected to the rotating shaft, the two ends of the rotating shaft are respectively fixedly connected to the top end of the first connecting member and the top end of the second connecting member, the two ends of the second connecting rod are respectively rotatably connected to the bottom end of the first connecting member and the bottom end of the second connecting member, the first transmission gear is sleeved on one end of the second connecting rod and fixed to each other, the other end of the second connecting rod is also provided with a second transmission gear and fixed to each other, when the rotating shaft rotates and drives the first connecting member and the second connecting member to rotate to the horizontal, the first transmission gear and the second transmission gear respectively mesh with the rack on the bottom side of the shelf.

[0015] As a further improvement, the refrigerator with adjustable shelves described above also includes:

[0016] An electric push rod is tilted and fixed on the support frame, with its bottom end close to the opening side of the housing. The two ends of the rotating shaft are rotatably connected to the top ends of the first connecting member and the second connecting member, respectively. The bottom end of the push rod of the electric push rod is hinged to the top end of the first connecting member, which is used to drive the first connecting member to rotate around the rotating shaft.

[0017] As a further improved technical solution, the second drive assembly includes a third lead screw motor and a third transmission gear. The third lead screw motor is vertically arranged on the outside of the second sleeve, and the third transmission gear is fixedly connected to one end of the rotating shaft, and the third transmission gear meshes with the lead screw of the third lead screw motor.

[0018] As a further improvement, the refrigerator with adjustable shelves described above also includes:

[0019] The device includes a limiting gear and an auxiliary gear. The auxiliary gear is located on the outside of the first sleeve. The limiting gear is fixedly connected to the end of the rotating shaft away from the third transmission gear. The limiting gear meshes with the auxiliary gear. When the retaining teeth at both ends of the limiting gear mesh with the auxiliary gear, the rotating shaft rotates to its limit angle.

[0020] As a further improved technical solution, the third drive assembly includes a fourth lead screw motor, a fourth transmission gear, a fifth transmission gear, and a third connecting rod. The fourth lead screw motor is vertically arranged on the outside of the housing. The third connecting rod is arranged on the side of the housing near the fourth lead screw motor and passes through the housing. The fourth transmission gear and the fifth transmission gear are respectively fixedly arranged at both ends of the third connecting rod. The fifth transmission gear meshes with the lead screw of the fourth lead screw motor, and the fourth transmission gear is used to mesh with the first transmission gear.

[0021] As a further improvement, the refrigerator with adjustable shelves described above also includes:

[0022] A transmission assembly includes a first gear, a second gear, a third gear, a fourth gear, a fourth connecting rod, and a rack and pinion belt. The first gear is fixedly connected to one end of the second connecting rod, and the second gear is rotatably connected to one end of the rotating shaft. An inner groove is provided on one side of the support frame. The fourth connecting rod is disposed on the support frame and passes through one side of the support frame. The third gear and the fourth gear are fixedly connected to both ends of the fourth connecting rod, and the fourth gear is located in the inner groove. The rack and pinion belt is sleeved on the first gear, the second gear, and the third gear. The fourth gear is used to mesh with the rack on the bottom side of the shelf and drive the shelf to move.

[0023] As a further improvement, the refrigerator with adjustable shelves described above also includes:

[0024] The fifth link and the fixed gear are respectively located on opposite sides of the housing and can rotate on the housing. The fixed gear is sleeved on the fifth link and fixed to it. The fixed gear meshes with the rack on the bottom side of the shelf.

[0025] Compared with the prior art, the embodiments of the present invention have the following advantages:

[0026] This invention provides a refrigerator with a liftable shelf, comprising: a cabinet and a shelf, the shelf being slidably disposed within the cabinet and having a rack at its bottom; a first drive assembly, a lifting member, and a bracket, the first drive assembly being disposed on the cabinet, the lifting member being liftably disposed on the first drive assembly and driven by the first drive assembly, and the bracket being flip-mounted on the lifting member, wherein when the bracket is flipped to a horizontal position, a portion of the bracket is located outside the cabinet and the bracket is misaligned with the shelf; a second drive assembly, the second drive assembly being disposed on the lifting member and connected to the bracket, for driving the bracket to flip around the lifting member; a first transmission gear, the first transmission gear being rotatably disposed on the bracket and capable of following the bracket in flipping around the lifting member; and a third drive assembly, the third drive assembly being disposed on one side of the cabinet, wherein when the bracket is flipped to a horizontal position and raised to correspond with the shelf, the first transmission gear simultaneously engages with the rack and the third drive assembly, the third drive assembly driving the first transmission gear to rotate, and thereby moving the shelf onto the bracket via the first transmission gear. In this invention, the shelves are moved onto the support and the support is lowered by various drive components, making it easy for children or people with disabilities to access items on the shelves. Attached Figure Description

[0027] Figure 1 An exploded view of a refrigerator with adjustable shelves provided for this invention;

[0028] Figure 2 This is a schematic diagram of the assembly structure of the first drive component and the lifting component in this invention;

[0029] Figure 3 This is a three-dimensional structural diagram of the third driving component in this invention;

[0030] Figure 4 This is a three-dimensional structural diagram of the shelf in this invention;

[0031] Figure 5 This is a three-dimensional structural diagram of the bracket in this invention;

[0032] Figure 6 This is a three-dimensional structural diagram of the first connector in this invention;

[0033] Figure 7 This is a schematic diagram of the left side structure of the box in this invention;

[0034] Figure 8 for Figure 7 Enlarged diagram of A in the middle;

[0035] Figure 9 This is a three-dimensional structural diagram of the limiting gear in this invention;

[0036] Figure 10 This is a schematic diagram of the right side structure of the box in this invention;

[0037] Figure 11 for Figure 10 Enlarged diagram of B in the middle;

[0038] Figure 12 This is a schematic diagram of the front assembly structure of the electric push rod and transmission assembly with the bracket in this invention;

[0039] Figure 13 This is a three-dimensional structural diagram of the transmission component in this invention;

[0040] Figure 14 This is a schematic diagram of the rear assembly structure of the electric push rod and transmission assembly with the bracket in this invention;

[0041] Figure 15 This is a three-dimensional structural diagram of the bracket when it is rotated to a horizontal position in this invention;

[0042] Figure 16 This is a three-dimensional structural diagram of the second connecting rod in this invention when it rotates around the pivot and is retracted.

[0043] Figure 17 A first front view of a refrigerator with a liftable shelf provided by the present invention;

[0044] Figure 18 A second front view of a refrigerator with a liftable shelf is shown in the present invention.

[0045] Figure 19 This is a schematic diagram of the structure of the bracket when it is in the zero position in this invention;

[0046] Figure 20 This is a schematic diagram of the support structure when it is flipped in this invention;

[0047] Figure 21 This is a schematic diagram of the structure after the shelf is moved onto the support in this invention;

[0048] Figure 22 This is a schematic diagram of the structure of the support after it has been lowered in this invention;

[0049] Figure 23This is a schematic diagram of the structure of the shelf in this invention when it is about to be moved into the box.

[0050] In the diagram: 1. Housing; 101. First slide rail; 102. Second slide rail; 2. First drive assembly; 201. First lead screw motor; 202. Second lead screw motor; 203. Lifting component; 2031. First connecting rod; 2032. First sleeve; 2033. Second sleeve; 3. Second drive assembly; 301. Third lead screw motor; 302. Third transmission gear; 4. Third drive assembly; 401. Fourth lead screw motor; 402. Fourth transmission gear; 403. Fifth transmission gear; 404. Third connecting rod; 5. Shelf; 501. Rack; 6. Support; 60 1. Rotating shaft; 602. Second connecting rod; 603. First connecting piece; 604. Second connecting piece; 605. Support frame; 6051. Inner groove; 7. First transmission gear; 8. Control panel; 9. Second transmission gear; 10. Electric push rod; 11. Limit gear; 12. Auxiliary gear; 13. Transmission assembly; 1301. First gear; 1302. Second gear; 1303. Third gear; 1304. Fourth gear; 1305. Fourth connecting rod; 1306. Rack and belt; 14. Fifth connecting rod; 15. Fixed gear; 16. Button; 17. Auxiliary pulley. Detailed Implementation

[0051] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0052] Example:

[0053] Please see Figures 1-23The refrigerator with a liftable shelf includes: a cabinet 1 and a shelf 5, the shelf 5 being slidably disposed within the cabinet 1, and the shelf 5 having a rack at its bottom; a first drive assembly 2, a lifting component 203, and a bracket 6, the first drive assembly 2 being disposed on the cabinet 1, the lifting component 203 being liftably disposed on the first drive assembly 2 and driven by the first drive assembly 2, the bracket 6 being flip-mounted on the lifting component 203, and when the bracket 6 is flipped to a horizontal position, part of the bracket 6 is located outside the cabinet 1, and the bracket 6 is misaligned with the shelf 5; and a second drive assembly 3, the second drive assembly being disposed on the lifting component 203. The first transmission gear 7 is rotatably mounted on the support 6 and connected to the bracket 6, and is used to drive the bracket 6 to rotate around the lifting member 203; the third drive assembly 4 is located on one side of the housing 1. When the bracket 6 is rotated to a horizontal position and raised to correspond with the shelf 5, the first transmission gear 7 simultaneously meshes with the rack and the third drive assembly 4. The third drive assembly 4 is used to drive the first transmission gear 7 to rotate, and through the first transmission gear 7, it drives the shelf 5 to move onto the support 6.

[0054] like Figures 1-11As shown, in this embodiment, the box 1 is provided with a shelf 5, the bottom of which is provided with a rack, and the shelf 5 is slidably mounted inside the box 1 via the rack. The box 1 is provided with a first drive assembly 2, and the first drive assembly 2 is provided with a lifting component 203. The lifting component 203 can be driven by the first drive assembly 2 to complete the lifting and lowering. The bracket 6 is rotatably mounted on the lifting component 203. The second drive assembly 3 is mounted on the lifting component 203 and connected to one end of the bracket 6, and is used to drive the bracket 6 to rotate. The bracket 6 can both rise and fall with the lifting component 203, and can also rotate around the lifting component 203. When the bracket 6 rotates to the horizontal position, the upper part of the bracket 6 will rotate outside the box 1, and the lower part of the bracket 6 will be offset from the shelf 5, that is, the shelf 5 and the bracket 6 are aligned. 6. There is no overlap in the vertical projection. When the support 6 moves up and down, it is not obstructed by the shelf 5. The first transmission gear 7 is located at the bottom of the support 6 and can rotate on the support 6. Simultaneously, the first transmission gear 7 can also follow the support 6 in its revolution around the lifting component 203. When the support 6 flips to a horizontal position and rises to correspond with the shelf 5, the first transmission gear 7 simultaneously meshes with the rack and the third drive assembly 4. At this time, the third drive assembly 4 can drive the first transmission gear 7 to rotate. After the first transmission gear 7 rotates, it drives the shelf 5 to move through the rack. Therefore, the first transmission gear 7 can drive the shelf 5 to move onto the already horizontal support 6, and then the first drive assembly 2 and the lifting component 203 can drive the support 6 to move up and down. In addition, the side of the housing 1 in this embodiment is also provided with a control panel 8, which is electrically connected to the first drive assembly 2, the second drive assembly 3, and the third drive assembly 4, respectively, and is used to control the switching of each drive assembly. In this invention, the second drive assembly 3 is controlled by the control panel 8 to rotate the support 6 to a horizontal position. Then, the third drive assembly 4 causes the first transmission gear 7 to push the shelf 5 and move it onto the support 6. Finally, the first drive assembly 2 causes the support 6 to descend, making it easier for children or disabled people to access items on the shelf 5.

[0055] As a further embodiment, the first drive assembly 2 includes a first lead screw motor 201 and a second lead screw motor 202, as detailed below. Figure 2The first lead screw motor 201 and the second lead screw motor 202 are respectively vertically arranged on the outer sides of the left and right sides of the housing 1. The left and right sides of the housing 1 are respectively provided with a first sliding groove 101 and a second sliding groove 102 that are symmetrically arranged. Both the first sliding groove 101 and the second sliding groove 102 are vertically oriented rectangular through holes. The lifting member 203 is located inside the housing 1. The left end of the lifting member 203 extends out of the first sliding groove 101 and is sleeved on the lead screw of the first lead screw motor 201, while the right end extends out of the second sliding groove 102 and is sleeved on the... On the lead screw of the second lead screw motor 202, the bracket 6 is rotatably mounted on the lifting member 203, that is, the bracket 6 can rotate around the lifting member 203. The first lead screw motor 201 and the second lead screw motor 202 are electrically connected to the control panel 8 respectively, and are used to synchronously drive the lifting member 203 to rise and fall along the first slide groove 101 and the second slide groove 102. When the lifting member 203 moves up and down, it will drive the bracket 6 to move up and down together. In this embodiment, the first lead screw motor 201 and the second lead screw motor 202 are both existing lead screw motors.

[0056] As a further embodiment, the lifting component 203 includes a first connecting rod 2031, a first sleeve 2032, and a second sleeve 2033. The first sleeve 2032 and the second sleeve 2033 are respectively provided with internal threads (not shown). The first sleeve 2032 is sleeved on the lead screw of the first lead screw motor 201 and threadedly connected, and the second sleeve 2033 is sleeved on the lead screw of the second lead screw motor 202 and threadedly connected. When the lead screws of the first lead screw motor 201 and the second lead screw motor 202 rotate... When in motion, the first sleeve 2032 and the second sleeve 2033 will be driven to move up and down through the thread on the lead screw. The first connecting rod 2031 is located inside the housing 1. One end of the first connecting rod 2031 passes through the first sliding groove 101 and is connected to the first sleeve 2032, and the other end passes through the second sliding groove 102 and is connected to the second sleeve 2033. The bracket 6 is sleeved on the first connecting rod 2031, that is, the bracket 6 is set on the first connecting rod 2031 and can rotate around the first connecting rod 2031.

[0057] In this embodiment, the bracket 6 includes a rotating shaft 601, a second connecting rod 602, a first connecting member 603, a second connecting member 604, and a support platform 605 for supporting the shelf 5; see details. Figure 5 and Figure 6The rotating shaft 601 is a hollow tube and is sleeved on the first connecting rod 2031. The support frame 605 is U-shaped, and its open side is fixedly connected to the rotating shaft 601. The two ends of the rotating shaft 601 are fixedly connected to the top end of the first connecting member 603 and the top end of the second connecting member 604, respectively. Therefore, when the rotating shaft 601 rotates, it can drive the second connecting rod 602 to rotate together. The two ends of the second connecting rod 602 are rotatably connected to the bottom end of the first connecting member 603 and the bottom end of the second connecting member 604, respectively. 602 can rotate on the first connecting member 603 and the second connecting member 604. The first transmission gear 7 is sleeved on one end of the second connecting rod 602 and fixed to each other. The other end of the second connecting rod 602 is also provided with a second transmission gear 9 and fixed to each other. When the rotating shaft 601 rotates and drives the first connecting member 603 and the second connecting member 604 to rotate to the horizontal, the second connecting rod 602 also rotates to be on the same horizontal plane as the rotating shaft 601. At this time, the first transmission gear 7 and the second transmission gear 9 respectively mesh with the rack 501 on the bottom side of the shelf 5.

[0058] like Figures 12-18 As shown, as a further embodiment, the refrigerator with adjustable shelves also includes an electric push rod 10. The electric push rod 10 is a conventional electric push rod 10 and is obliquely fixed to the support frame 605. The bottom end of the electric push rod 10 is close to the opening side of the cabinet 1. The two ends of the rotating shaft 601 are rotatably connected to the top ends of the first connecting member 603 and the second connecting member 604, respectively. Therefore, the rotating shaft 601 will not drive the first connecting member 603 and the second connecting member 604 to rotate when it rotates. The bottom end of the push rod 10 is hinged to the top end of the first connecting member 603. Therefore, the electric push rod 10 can push the first connecting member 603 to rotate around the rotating shaft 601, thereby controlling the rotation of the second connecting rod 602. See details... Figures 15-16 The electric push rod 10 is electrically connected to the control panel 8 and is used to drive the first connecting member 603 to rotate around the rotating shaft 601. By using the electric push rod 10 to push the second connecting rod 602 to rotate, the rotation of the second connecting rod 602 can be separated from the rotation of the support frame 605. When multiple shelves 5 are set inside the refrigerator, if the top shelf 5 is to be taken, when the entire support 6 is rotated to the horizontal position, the second connecting rod 602 is located above the other shelves 5, which prevents the support 6 from descending to the bottom of the cabinet 1. At this time, by using the electric push rod 10 to push the second connecting rod 602 and rotate it around the rotating shaft 601 until it is on the same vertical plane as the rotating shaft 601, the support 6 can be lowered to the bottom of the cabinet 1.

[0059] As a further embodiment, the second drive assembly 3 includes a third lead screw motor 301 and a third transmission gear 302. The third lead screw motor 301 is vertically disposed on the outside of the second sleeve 2033. The third transmission gear 302 is fixedly connected to one end of the rotating shaft 601, and the third transmission gear 302 meshes with the lead screw of the third lead screw motor 301. See details... Figure 11 The third lead screw motor 301 is electrically connected to the control panel 8 and is used to drive the third transmission gear 302 to rotate. After the third transmission gear 302 rotates, it can drive the rotating shaft 601 to rotate.

[0060] In this embodiment, the refrigerator with adjustable shelves further includes a limiting gear 11 and an auxiliary gear 12. The auxiliary gear 12 is disposed on the outside of the first sleeve 2032. The limiting gear 11 is fixedly connected to the end of the rotating shaft 601 away from the third transmission gear 302, and the limiting gear 11 meshes with the auxiliary gear 12. See details... Figure 8 and Figure 9 The outer circumference of the limiting gear 11 is provided with only a small section of teeth. The specific length can be adjusted according to the required rotation angle of the rotating shaft 601. When the teeth at both ends of the limiting gear 11 mesh with the auxiliary gear 12, the rotating shaft 601 rotates to the limit angle. For example, when the teeth at the top of the limiting gear 11 mesh with the auxiliary gear 12, the limiting gear 11 cannot rotate downwards, and the support frame 605 is in a vertical state. When the teeth at the bottom of the limiting gear 11 mesh with the auxiliary gear 12, the limiting gear 11 cannot rotate upwards, and the support frame 605 is in a horizontal state.

[0061] As a further embodiment, the third drive assembly 4 includes a fourth lead screw motor 401, a fourth transmission gear 402, a fifth transmission gear 403, and a third connecting rod 404, as detailed below. Figure 3 The fourth lead screw motor 401 is vertically arranged on the outside of the housing 1. The third connecting rod 404 is arranged on the right side of the housing 1 and passes through the housing 1. The fourth transmission gear 402 and the fifth transmission gear 403 are respectively fixedly arranged at both ends of the third connecting rod 404. The fifth transmission gear 403 meshes with the lead screw of the fourth lead screw motor 401. The fourth lead screw motor 401 is electrically connected to the control panel 8 and is used to drive the fifth transmission gear 403 and the fourth transmission gear 402 to rotate. The fourth transmission gear 402 is used to mesh with the first transmission gear 7. When the bracket 6 is rotated to the horizontal, the fourth transmission gear 402 meshes with the first transmission gear 7. After the fourth lead screw motor 401 is started, it will drive the fourth transmission gear 402 to rotate. The fourth transmission gear 402 drives the first transmission gear 7 to rotate.

[0062] It should be noted that the first lead screw motor 201, the second lead screw motor 202, the third lead screw motor 301 and the fourth lead screw motor 401 in this invention can all rotate in both forward and reverse directions.

[0063] As a further improvement, the refrigerator with adjustable shelves also includes a transmission assembly 13, which comprises a first gear 1301, a second gear 1302, a third gear 1303, a fourth gear 1304, a fourth connecting rod 1305, and a rack and pinion belt 1306, as detailed below. Figure 13 and Figure 14 The first gear 1301 is fixedly connected to one end of the second connecting rod 602, and the second gear 1302 is rotatably connected to one end of the rotating shaft 601. An inner groove 6051 is provided on one side of the support frame 605. The fourth connecting rod 1305 is mounted on the support frame 605 and passes through one side of the support frame 605. The third gear 1303 and the fourth gear 1304 are fixedly connected to both ends of the fourth connecting rod 1305, and the fourth gear 1304 is located within the inner groove 6051. The rack belt 1306 is sleeved on the first gear 1301, the second gear 1302 and the third gear 1303. The fourth gear 1304 is used to mesh with the rack 501 on the bottom side of the shelf 5 and drive the shelf 5 to move. Since the first transmission gear 7 cannot completely send the shelf 5 into the support frame 605, the main function of the transmission assembly 13 is to assist the shelf 5 to move completely onto the support frame 605 through the fourth gear 1304 in the inner groove 6051, and to move the shelf 5 back into the box 1 to reset.

[0064] Meanwhile, a button 16 is also provided on the top side of the support frame 605. The button 16 is electrically connected to the control panel 8. When the support frame 605 is rotated to a horizontal position, the top side faces the user. After the user takes the item, they can directly press the button 16 to reset the shelf 5 and the bracket 6. An auxiliary pulley 17 is also provided in the inner groove 6051 of the support frame 605. The auxiliary pulley 17 assists the shelf 5 in sliding. When the shelf 5 moves onto the support frame 605, the rack 501 at the bottom of the shelf 5 will engage with the auxiliary pulley 17.

[0065] In this embodiment, the refrigerator with adjustable shelves further includes a fifth link 14 and a fixed gear 15. The two ends of the fifth link 14 are respectively located on opposite sides of the cabinet 1, and the fifth link 14 is rotatable on the cabinet 1. The fixed gear 15 is sleeved on the fifth link 14 and fixed to it. The fixed gear 15 meshes with a rack 501 on the bottom side of the shelf 5. Specifically, three fifth links 14 are provided below each shelf 5, and a fixed gear 15 is fixed to both ends of each fifth link 14. See details... Figure 17 and Figure 18 When the shelf 5 moves, the fifth link 14 and the fixed gear 15 rotate together to assist the shelf 5 in moving.

[0066] As a further solution, when the shelf 5 inside the cabinet 1 has multiple layers, the control panel 8 has multiple digital positions. For example, if the shelf 5 has three layers, the control panel 8 has three digital positions: 1, 2, and 3. If the user wants to take an item from the first shelf 5, he / she only needs to press position 1. After taking the item, press button 16 on the support frame 605 to reset the support 6 and the shelf 5.

[0067] like Figures 19-23 As shown, the operating steps of the refrigerator with adjustable shelves in this embodiment are as follows:

[0068] First, bracket 6 is in the zero position, and shelf 5 is located inside box 1. See details. Figure 19 ;

[0069] In the second step, bracket 6 rises and flips to a horizontal position. At this time, the first transmission gear 7 meshes with the fourth transmission gear 402. See details. Figure 20 ;

[0070] Thirdly, the first transmission gear 7 drives the shelf 5 to move onto the support frame 605, and the push rod pushes the second connecting rod 602, causing the second connecting rod 602 to flip above the rotating shaft 601. See details. Figure 21 ;

[0071] Fourth step: The support 6 is lowered by the first lead screw motor 201 and the second lead screw motor 202. At this time, the support platform 605 is at the bottom of the box 1. See details. Figure 22 ;

[0072] Fifth step: After the item is retrieved, the first lead screw motor 201 and the second lead screw motor 202 raise the bracket 6, and the push rod pushes the second connecting rod 602. The second connecting rod 602 and the rotating shaft 601 are on the same horizontal plane. At this time, the first transmission gear 7 meshes with the fourth transmission gear 402, and the shelf 5 is moved into the housing 1 through the fourth gear 1304 in the transmission assembly 13. See details. Figure 23 ;

[0073] Step 6: After shelf 5 is reset, bracket 6 will also be reset, as follows. Figure 19 As shown.

[0074] In summary, this invention provides a refrigerator with a height-adjustable shelf, comprising: a cabinet 1, on which a first drive assembly 2, a second drive assembly 3, and a third drive assembly 4 are provided; a shelf 5, which is slidably disposed within the cabinet 1, and a rack 501 is provided on the bottom side of the shelf 5; a support 6, which is movably disposed on the first drive assembly 2 and located within the cabinet 1, and the support 6 can be raised and lowered by the first drive assembly 2, and the second drive assembly 3 is connected to one end of the support 6 to drive the support 6 to rotate; a first transmission gear 7, which is disposed on the support 6, and when the support 6 rotates to a horizontal position, the third drive assembly 4 is connected to the first transmission gear 7 to drive the first transmission gear 7 to rotate, and the first transmission gear 7 meshes with the rack 501 and drives the shelf 5 to move onto the support 6; and a control panel 8, which is disposed on one side of the cabinet 1, and the first drive assembly 2, the second drive assembly 3, and the third drive assembly 4 are electrically connected to the control panel 8. In this invention, the second drive assembly 3 is controlled by the control panel 8 to rotate the support 6 to a horizontal position. Then, the third drive assembly 4 causes the first transmission gear 7 to push the shelf 5 and move it onto the support 6. Finally, the first drive assembly 2 causes the support 6 to descend, making it easier for children or disabled people to access items on the shelf 5.

[0075] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0076] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0077] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0078] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0079] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0080] Of course, the above description of the embodiments of the present invention is quite detailed, but it should not be construed as a limitation on the scope of protection of the present invention. The present invention may have many other implementations. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of the present invention. The scope of protection of the present invention is determined by the appended claims.

Claims

1. A refrigerator with liftable shelves, characterized in that, include: The box body and the shelf, wherein the shelf is slidably disposed in the box body and the bottom of the shelf is provided with a toothed rack; The first drive assembly, the lifting component, and the bracket are provided. The first drive assembly is disposed on the housing. The lifting component is elliptical and disposed on the first drive assembly and driven by the first drive assembly. The bracket is flip-mounted on the lifting component. When the bracket is flipped to a horizontal position, part of the bracket is located outside the housing and the bracket is misaligned with the shelf. A second drive assembly is disposed on the lifting member and connected to the bracket, for driving the bracket to rotate around the lifting member; The first transmission gear is rotatably mounted on the bracket and can rotate around the lifting member along with the bracket. The third drive assembly is located on one side of the housing. When the bracket is flipped to a horizontal position and raised or lowered to correspond with the shelf, the first transmission gear simultaneously meshes with the rack and the third drive assembly. The third drive assembly is used to drive the first transmission gear to rotate and, through the first transmission gear, move the shelf onto the bracket.

2. The refrigerator with a height-adjustable shelf according to claim 1, characterized in that, The first drive assembly includes a first lead screw motor and a second lead screw motor, which are respectively vertically arranged on the outer sides of opposite sides of the housing. The opposite sides of the housing are respectively provided with a first sliding groove and a second sliding groove. The lifting component is located inside the housing. One end of the lifting component extends out of the first sliding groove and is sleeved on the lead screw of the first lead screw motor, and the other end extends out of the second sliding groove and is sleeved on the lead screw of the second lead screw motor. The bracket is rotatably mounted on the lifting component. The first lead screw motor and the second lead screw motor are used to synchronously drive the lifting component to move up and down along the first sliding groove and the second sliding groove.

3. The refrigerator with a height-adjustable shelf according to claim 2, characterized in that, The lifting component includes a first connecting rod, a first sleeve, and a second sleeve. The first sleeve and the second sleeve are respectively provided with internal threads. The first sleeve is sleeved on the lead screw of the first lead screw motor and threadedly connected. The second sleeve is sleeved on the lead screw of the second lead screw motor and threadedly connected. The first connecting rod is located in the housing. One end of the first connecting rod passes through the first sliding groove and is connected to the first sleeve, and the other end passes through the second sliding groove and is connected to the second sleeve. The bracket is sleeved on the first connecting rod.

4. The refrigerator with a height-adjustable shelf according to claim 3, characterized in that, The bracket includes a rotating shaft, a second connecting rod, a first connecting member, a second connecting member, and a support frame for supporting the shelf. The rotating shaft is sleeved on the first connecting rod. The support frame is U-shaped, with its open side fixedly connected to the rotating shaft. Both ends of the rotating shaft are fixedly connected to the top ends of the first connecting member and the second connecting member, respectively. Both ends of the second connecting rod are rotatably connected to the bottom ends of the first connecting member and the second connecting member, respectively. A first transmission gear is sleeved on one end of the second connecting rod and fixed to each other. The other end of the second connecting rod is also provided with a second transmission gear and fixed to each other. When the rotating shaft rotates and drives the first connecting member and the second connecting member to rotate to a horizontal position, the first transmission gear and the second transmission gear respectively mesh with the rack on the bottom side of the shelf.

5. The refrigerator with a liftable shelf according to claim 4, characterized in that, Also includes: An electric push rod is tilted and fixed on the support frame, with its bottom end close to the opening side of the housing. The two ends of the rotating shaft are rotatably connected to the top ends of the first connecting member and the second connecting member, respectively. The bottom end of the push rod of the electric push rod is hinged to the top end of the first connecting member, which is used to drive the first connecting member to rotate around the rotating shaft.

6. The refrigerator with a height-adjustable shelf according to claim 5, characterized in that, The second drive assembly includes a third lead screw motor and a third transmission gear. The third lead screw motor is vertically arranged on the outside of the second sleeve. The third transmission gear is fixedly connected to one end of the rotating shaft and meshes with the lead screw of the third lead screw motor.

7. The refrigerator with a liftable shelf according to claim 6, characterized in that, Also includes: The device includes a limiting gear and an auxiliary gear. The auxiliary gear is located on the outside of the first sleeve. The limiting gear is fixedly connected to the end of the rotating shaft away from the third transmission gear. The limiting gear meshes with the auxiliary gear. When the retaining teeth at both ends of the limiting gear mesh with the auxiliary gear, the rotating shaft rotates to its limit angle.

8. The refrigerator with a liftable shelf according to claim 6, characterized in that, The third drive assembly includes a fourth lead screw motor, a fourth transmission gear, a fifth transmission gear, and a third connecting rod. The fourth lead screw motor is vertically disposed on the outside of the housing. The third connecting rod is disposed on the side of the housing near the fourth lead screw motor and passes through the housing. The fourth transmission gear and the fifth transmission gear are respectively fixedly disposed at both ends of the third connecting rod. The fifth transmission gear meshes with the lead screw of the fourth lead screw motor, and the fourth transmission gear is used to mesh with the first transmission gear.

9. The refrigerator with a height-adjustable shelf according to claim 5, characterized in that, Also includes: A transmission assembly includes a first gear, a second gear, a third gear, a fourth gear, a fourth connecting rod, and a rack and pinion belt. The first gear is fixedly connected to one end of the second connecting rod, and the second gear is rotatably connected to one end of the rotating shaft. An inner groove is provided on one side of the support frame. The fourth connecting rod is disposed on the support frame and passes through one side of the support frame. The third gear and the fourth gear are fixedly connected to both ends of the fourth connecting rod, and the fourth gear is located in the inner groove. The rack and pinion belt is sleeved on the first gear, the second gear, and the third gear. The fourth gear is used to mesh with the rack on the bottom side of the shelf and drive the shelf to move.

10. A refrigerator with a liftable shelf according to any one of claims 1-9, characterized in that, Also includes: The fifth link and the fixed gear are respectively located on opposite sides of the housing and can rotate on the housing. The fixed gear is sleeved on the fifth link and fixed to it. The fixed gear meshes with the rack on the bottom side of the shelf.

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