Shelf assembly and storage apparatus

Abstract

The utility model discloses a shelf assembly and storage equipment relates to storage equipment technical field, and the shelf assembly includes support seat, installs the shelf of support seat, lifting mechanism, transmission mechanism and drive mechanism, and lifting mechanism is connected with support seat to drive support seat to lift, transmission mechanism includes first gear set, second gear set, fifth gear and sixth gear, and first gear set and fifth gear are established in one side of support seat, and first gear set is connected with fifth gear transmission, and second gear set and sixth gear are established in the other side of support seat, and second gear set is connected with sixth gear and lifting mechanism transmission respectively, and fifth gear and sixth gear coaxial arrangement and fixed connection, and fifth gear and support seat rotation cooperation, drive mechanism is connected with first gear set transmission to drive the shelf lifting through lifting mechanism. The utility model discloses the compact structure of shelf assembly's transmission mechanism, and the whole volume is small, and the space is small, and the convenient installation and flexible layout are occupied.

Description

Technical Field

[0001] This utility model relates to the field of storage equipment technology, and in particular to a shelf assembly and storage equipment. Background Technology

[0002] Storage devices such as refrigerators, wine cabinets, and display cases are typically equipped with height-adjustable shelves to accommodate items of varying heights. Related technologies utilize gear transmission systems to adjust the shelf height, including gearboxes with at least two gear sets. However, existing gearboxes suffer from an unreasonable gear set layout, resulting in significant unused space between gear sets. This leads to a large overall size of the gearbox, occupying considerable space and hindering installation and layout. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a shelf assembly with a compact transmission mechanism, small overall size, small space occupation, and convenient installation and flexible layout.

[0004] This utility model also provides a storage device having the above-mentioned shelf assembly.

[0005] A shelf assembly according to a first aspect of the present invention includes a support base; a shelf mounted on the support base; a lifting mechanism connected to the support base to drive the support base to lift; a transmission mechanism including a first gear set, a second gear set, a fifth gear, and a sixth gear, wherein the first gear set and the fifth gear are disposed on one side of the support base and are drively connected to the fifth gear, the second gear set and the sixth gear are disposed on the other side of the support base and are drively connected to the sixth gear and the lifting mechanism respectively, the fifth gear and the sixth gear are coaxially arranged and fixedly connected, and the fifth gear is rotatably engaged with the support base; and a drive mechanism drively connected to the first gear set to drive the shelf to lift via the lifting mechanism.

[0006] The shelf assembly according to the first aspect of the present invention has at least the following beneficial effects: by setting the first gear set and the fifth gear in the transmission mechanism to one side of the support base, and setting the second gear set and the sixth gear in the transmission mechanism to the other side of the support base, wherein the fifth gear and the sixth gear are coaxially arranged and fixedly connected, the axial thickness of the part of the structure located on one side of the support base in the transmission mechanism can be reduced, and by optimizing the layout of the first gear set and the second gear set to reduce the empty space in the transmission mechanism, the overall volume of the transmission mechanism is reduced, the space occupied is reduced, and the installation and layout are convenient.

[0007] According to some embodiments of the present invention, the transmission mechanism further includes a third shaft portion, the support base includes a support plate, the support plate is provided with a shaft hole, the third shaft portion passes through the shaft hole and rotates with the support plate, and the fifth gear and the sixth gear are respectively connected to both ends of the third shaft portion.

[0008] According to some embodiments of this utility model, the fifth gear, the sixth gear, and the third shaft are an integral structure.

[0009] According to some embodiments of the present invention, the tip circle diameter of the fifth gear is greater than that of the sixth gear, and the outer diameter of the third shaft portion is greater than or equal to that of the sixth gear.

[0010] According to some embodiments of the present invention, the length of the third shaft portion is greater than the thickness of the support plate along the direction of the central axis of the fifth gear.

[0011] According to some embodiments of the present invention, the second gear set is located on the side of the support seat facing the center of gravity of the shelf, and the second gear set is close to the rear end of the shelf.

[0012] According to some embodiments of the present invention, the transmission mechanism further includes a first cover and a second cover. The first cover covers the first gear set and the fifth gear and is connected to the support base. The second cover covers the second gear set and the sixth gear and is connected to the support base.

[0013] According to some embodiments of the present invention, the second cover is located on the side of the support seat facing the center of gravity of the shelf, and the second cover is close to the rear end of the shelf. The lower end of the second cover is provided with a clearance wall, and the distance between the clearance wall and the support seat in the direction of the central axis of the fifth gear increases from bottom to top.

[0014] According to some embodiments of the present invention, the clearance wall is located at the front end of the second cover, and the distance between the clearance wall and the support seat in the direction of the central axis of the fifth gear increases from front to back.

[0015] A storage device according to a second aspect of the present invention includes a housing and a shelf assembly according to a first aspect of the present invention, the shelf assembly being disposed within the housing.

[0016] The storage device according to the second aspect of the present invention has at least the following beneficial effects: Since the storage device adopts the above-mentioned shelf assembly, by setting the first gear set and the fifth gear connected in the transmission mechanism on one side of the support base, and setting the second gear set and the sixth gear connected in the transmission mechanism on the other side of the support base, wherein the fifth gear and the sixth gear are coaxially arranged and fixedly connected, the axial thickness of the part of the structure located on one side of the support base in the transmission mechanism can be reduced, and by optimizing the layout of the first gear set and the second gear set to reduce the empty space in the transmission mechanism, the overall volume of the transmission mechanism is reduced, the space occupied is reduced, and the installation and layout are convenient.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is an exploded view of the shelf assembly in an embodiment of this utility model; Figure 2 This is a left view of the shelf assembly in an embodiment of this utility model; Figure 3 This is a partial structural schematic diagram of the shelf assembly in an embodiment of this utility model; Figure 4 This is a partial structural diagram of the shelf assembly after the first and second covers are hidden in an embodiment of this utility model; Figure 5 This is a partial structural schematic diagram from another perspective of the shelf assembly after the first and second covers are hidden in an embodiment of this utility model. Figure 6 This is a partially exploded view of the shelf assembly in an embodiment of this utility model; Figure 7 This is a schematic diagram of the connection between the fifth gear, the sixth gear, and the third shaft in an embodiment of this utility model; Figure 8 This is an exploded view of the engagement of the rotating shaft module, the first gear, the second gear, and the elastic constraint component in an embodiment of this utility model. Figure 9 This is a right view of the engagement of the rotating shaft module, the first gear, the second gear, and the elastic constraint member in an embodiment of this utility model (part of the structure of the first gear has been removed). Figure 10 This is an exploded view of the rack in an embodiment of this utility model.

[0019] Figure label: Support base 100; support plate 110; shaft hole 111; Shelf 200; Lifting mechanism 300; rack 310; body 311; limiting part 3111; tooth 3112; clearance part 3113; protruding rib 3114; fixing hole 3115; mounting wall 3116; decorative cover 312; fourth gear 320; drive shaft 330; first roller 340; second roller 350; second shaft 360; Drive mechanism 400; drive component 410; handle 411; third gear 412; rotating shaft module 420; fixed shaft 421; first gear 430; first transmission part 431; first groove 432; receiving groove 433; second gear 440; second transmission part 441; elastic constraint member 450; elastic main body part 451; first connecting part 452; second connecting part 453; Transmission mechanism 500; fifth gear 510; sixth gear 520; seventh gear 530; eighth gear 540; ninth gear 550; tenth gear 560; first cover 570; second cover 580; clearance wall 581; third shaft 590. Detailed Implementation

[0020] The embodiments of this utility model 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 this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as setting, installing, connecting, assembling, and cooperating should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] Reference Figures 1 to 10 As shown, a first aspect of this utility model provides a shelf assembly for use in storage devices. Typically, the storage device includes a housing, and the shelf assembly is installed within the housing. The shelf assembly is used to support items, allowing for layered placement of items within the storage device and improving space utilization. The storage device can be a refrigerator, wine cabinet, display case, etc. Reference Figure 1 As shown, it can be understood that the shelf assembly includes a shelf 200, a support base 100, a lifting mechanism 300 and a drive mechanism 400. Generally speaking, there are two support bases 100, which are respectively installed on the left and right ends of the lower side of the shelf 200 to support the shelf 200.

[0025] Reference Figure 1 As shown, it can be understood that the shelf 200 can be a glass plate, metal plate, etc. The shelf 200 is embedded in the support base 100, and the shelf 200 and the support base 100 are not detachable, so that the shelf 200 and the support base 100 form an integral structure, which is beneficial to improving the installation stability of the shelf 200.

[0026] In other embodiments, the shelf 200 and the support base 100 are detachably connected. For example, first limiting plates are respectively provided at the left and right ends of the shelf 200, and the two first limiting plates are positioned on opposite sides of the two support bases 100. Second limiting plates are respectively provided at the front and rear ends of the two support bases 100, and the two second limiting plates limit the front and rear ends of the shelf 200, thereby allowing the shelf 200 to be installed on the two support bases 100. In this way, the shelf 200 can be removed by lifting it upwards, making it convenient to remove the shelf 200 for cleaning.

[0027] Reference Figure 1 and Figure 2As shown, the lifting mechanism 300 is connected to the two support seats 100 and is used to drive the support seats 100 to rise or fall, thereby adjusting the height of the shelf 200. Specifically, the lifting mechanism 300 includes two racks 310, two fourth gears 320, and a drive shaft 330. The two racks 310 are located on the left and right sides of the shelf 200 and are fixedly installed on the inner wall of the housing. The two racks 310 are arranged vertically and in parallel. The drive shaft 330 is arranged horizontally, and its two ends are rotatably engaged with the two support seats 100. The two fourth gears 320 are fixedly installed at both ends of the drive shaft 330 and mesh with the two racks 310 respectively. Therefore, when the drive shaft 330 rotates, the fourth gears 320 at both ends, in cooperation with the rack 310, can drive the shelf 200 and the support base 100 to move vertically as a whole, thus adjusting the height of the shelf 200. Since the fourth gears 320 at both ends are connected by the drive shaft 330, they rotate synchronously, allowing the shelf 200 to rise and fall smoothly.

[0028] Reference Figure 1 As shown, it can be understood that the two racks 310 are close to one end of the shelf 200 in the front-back direction. Generally speaking, the two racks 310 are close to the rear end of the shelf 200 to avoid the racks 310 occupying the front space of the shelf 200 and to facilitate users to store items.

[0029] It is easy to understand that the center of gravity of the shelf 200 is located in front of the rack 310. Under the gravity of the shelf 200, if there are items placed on the shelf 200, the weight of the items placed on the shelf 200 will be superimposed, and the shelf 200 will have a tendency to tilt downward, affecting the load-bearing stability and lifting stability of the shelf 200.

[0030] Therefore, referring to Figure 2 , Figure 4 and Figure 6 As shown, the lifting mechanism 300 also includes a first roller 340 and a second roller 350, which are rotatably mounted on the support base 100. Typically, both support bases 100 are equipped with the first roller 340 and the second roller 350. The following detailed description of the mounting structure of the first roller 340 and the second roller 350 on the left side is based on the left support base 100 as an example. The mounting structure of the first roller 340 and the second roller 350 on the right side can be referenced from that on the left side.

[0031] Reference Figure 2 , Figure 4 and Figure 6As shown, it can be understood that the first roller 340 and the second roller 350 respectively abut against two opposite sidewalls of the rack 310 in the front-back direction. Specifically, the rotation axes of the first roller 340 and the second roller 350 are both arranged in the left-right direction, that is, the rotation axes of the first roller 340 and the second roller 350 are parallel to the drive shaft 330. The first roller 340 is located above the second roller 350, and the first roller 340 is located behind the rack 310, while the second roller 350 is located in front of the rack 310. In other words, in the front-back direction, the first roller 340 is farther from the center of gravity of the shelf 200 than the second roller 350. Therefore, the first roller 340 can roll up and down along the rear sidewall of the rack 310, and the second roller 350 can roll up and down along the front sidewall of the rack 310.

[0032] Reference Figure 2 , Figure 4 and Figure 6 As shown, it can be understood that, viewed from the left view of the shelf assembly, the weight of the shelf 200 (or the weight of items placed on the shelf 200 if items are placed on it) creates a clockwise torque. This embodiment provides first rollers 340 and second rollers 350 that abut against opposite sides of the rack 310. The rack 310 exerts a force on the first roller 340 in a backward direction, and on the second roller 350 in a forward direction. The rack 310's forces on the first roller 340 and the second roller 350 respectively create a counter-clockwise reaction torque. This reaction torque is opposite in direction to the torque generated by gravity, thus canceling each other out and effectively preventing the shelf 200 from tipping over, thereby improving the stability of the shelf 200 supporting the items.

[0033] Meanwhile, when the drive shaft 330 rotates and the shelf 200 and support base 100 move vertically as a whole under the cooperation of the fourth gear 320 and the rack 310, the first roller 340 rolls along the rear side wall of the rack 310 and the second roller 350 rolls along the front side wall of the rack 310. Under the force of the rack 310, the first roller 340 and the second roller 350 provide stable support for the shelf 200 and support base 100, thereby providing guidance for the lifting and lowering movement of the support base 100 and the shelf 200, and thus improving the lifting and lowering stability of the shelf 200.

[0034] By integrating the guide system of the shelf 200 into the drive system composed of the rack 310 and the fourth gear 320, the structure of the lifting mechanism 300 can be simplified, the overall structure is simple, and the space occupied by the lifting mechanism 300 can be effectively reduced.

[0035] Furthermore, during assembly, after the rack 310 is fixed, the support base 100 and the shelf 200 are inserted into the rack 310 from one end (e.g., the upper end), so that the gear meshes with the rack 310. At the same time, the rack 310 is placed in the space between the first roller 340 and the second roller 350 in the front-back direction, so that the first roller 340 abuts against the rear side wall of the rack 310 and the second roller 350 abuts against the front side wall of the rack 310. The operation is simple and the assembly is convenient.

[0036] Understandably, the first roller 340 and the second roller 350 can only prevent the shelf 200 from tipping downwards. When the user accidentally applies an upward force to the front end of the shelf 200, the shelf 200 will be flipped upwards, causing the items on the shelf 200 to tip over.

[0037] Therefore, referring to Figure 2 and Figure 4 As shown, it can be understood that the lifting mechanism 300 also includes a second shaft portion 360, which is mounted on the support base 100. Generally speaking, both support bases 100 are equipped with the second shaft portion 360.

[0038] In other embodiments, only one of the support bases 100 may be equipped with the second shaft portion 360.

[0039] The mounting structure of the second shaft portion 360 on the left side will be described in detail below, taking the support base 100 on the left side as an example. The mounting structure of the second shaft portion 360 on the right side can be referred to the mounting structure of the second shaft portion 360 on the left side.

[0040] Reference Figure 2 and Figure 4 As shown, it can be understood that the second shaft portion 360 is fixedly mounted on the support base 100, or the second shaft portion 360 is rotatably mounted on the support base 100, and the second shaft portion 360 is arranged in the left-right direction. The second shaft portion 360 is located on one side of the rack 310 in the front-back direction, and the projections of the second shaft portion 360 and the rack 310 in the front-back direction at least partially overlap. Specifically, the second shaft portion 360 is located on the front side of the rack 310, that is, the second shaft portion 360 and the second roller 350 are located on the same side of the rack 310, and the second shaft portion 360 is located above the second roller 350, and part of the structure of the second shaft portion 360 overlaps with the projection of the rack 310 in the front-back direction.

[0041] Reference Figure 2 and Figure 4As shown, from the left view of the shelf assembly, during the normal lifting and lowering of the shelf 200, the second shaft 360 and the rack 310 are spaced apart to avoid contact between the second shaft 360 and the rack 310, which would generate friction that would affect the lifting and lowering of the shelf 200. When an upward force is applied to the front end of the shelf 200, the shelf 200 tends to flip upward. After the shelf 200 flips upward at a small angle, the second shaft 360 moves a small distance and abuts against the front side wall of the rack 310. Under the limiting action of the rack 310 on the second shaft 360, the shelf 200 can be restricted from further flipping upward, thereby effectively preventing the shelf 200 from being overturned, thus improving the load-bearing stability of the shelf 200, preventing items on the shelf 200 from tipping over, and facilitating user use.

[0042] In other embodiments, it is understood that the second shaft portion 360 is located on the rear side of the rack 310, that is, the second shaft portion 360 and the first roller 340 are located on the same side of the rack 310, and the second shaft portion 360 is located below the second roller 350, or the central axis of the second shaft portion 360 and the central axis of the second roller 350 are located on the same horizontal plane, and part of the structure of the second shaft portion 360 coincides with the projection of the rack 310 in the front-rear direction. Therefore, similarly, after the shelf 200 is flipped upward at a small angle, the second shaft portion 360 moves a small distance to abut against the front wall of the rack 310. Under the limiting effect of the rack 310 on the second shaft portion 360, the shelf 200 can be restricted from further flipping upward, thereby effectively preventing the shelf 200 from being overturned upward, thereby improving the load-bearing stability of the shelf 200, preventing the items on the shelf 200 from tipping over, and facilitating user use.

[0043] Reference Figure 4 , Figure 6 and Figure 10 As shown, the rack 310 includes multiple teeth 3112, which are located on the rear side of the rack 310 and arranged sequentially in the vertical direction. Furthermore, the teeth 3112 are staggered from the first roller 340 in the horizontal direction to avoid interference. A fourth gear 320 is located on the rear side of the rack 310 and meshes with each of the multiple teeth 3112. Therefore, positioning the teeth 3112 on the rear side of the rack 310 prevents them from being directly exposed on the front side of the shelf assembly, thus improving the overall aesthetics.

[0044] Reference Figure 6As shown, it can be understood that since both the first roller 340 and the fourth gear 320 are located behind the rack 310, to further reduce the space occupied by the lifting mechanism 300, the first roller 340 and the fourth gear 320 are arranged coaxially, that is, the first roller 340 is an auxiliary roller. Specifically, the first roller 340 is fixedly mounted on the drive shaft 330, or the first roller 340 is rotatably engaged with the drive shaft 330. The first roller 340 is located to the left or right of the fourth gear 320, that is, the first roller 340 is located on one axial side of the fourth gear 320. Therefore, the space occupied by the combination of the first roller 340, the second roller 350, and the fourth gear 320 in the vertical direction can be reduced, thereby reducing the overall space occupied by the lifting mechanism 300, and saving the shaft used to install the first roller 340, which facilitates assembly.

[0045] It is understandable that the first roller 340 and the fourth gear 320 are an integral structure. For example, the first roller 340 and the fourth gear 320 can be cast into one piece using a casting process. This facilitates production and processing, and also allows the first roller 340 and the fourth gear 320 to be installed on the drive shaft 330 in one go during assembly, making assembly convenient.

[0046] Reference Figure 2 , Figure 4 and Figure 6 As shown, it can be understood that during the lifting and lowering of the shelf 200, the rack 310 provides support for the first roller 340, and combined with the support of the rack 310 for the second roller 350, the distance between the central axis of the fourth gear 320 and the rack 310 remains constant. This constant distance includes both an absolute change in distance and fluctuation within a reasonable error range. This prevents the fourth gear 320 from jumping due to the positive pressure between the fourth gear 320 and the teeth 3112 during rotation, thus ensuring that the fourth gear 320 and the rack 310 are always in the optimal meshing state, which is beneficial to improving the lifting and lowering stability of the shelf 200.

[0047] In other embodiments, it is understood that the tooth 3112 may be disposed on the front side of the rack 310, and the tooth 3112 and the second roller 350 are staggered in the left-right direction to avoid interference, while the fourth gear 320 is located on the front side of the rack 310. To further reduce the space occupied by the lifting mechanism 300, the second roller 350 and the fourth gear 320 are arranged coaxially, and the second roller 350 and the fourth gear 320 are an integral structure. Further details are omitted here.

[0048] Reference Figure 2 and Figure 4As shown, it can be understood that the rack 310 is also provided with a limiting portion 3111, which is located below the second roller 350. Specifically, the limiting portion 3111 is provided at the lower end of the rack 310, and the limiting portion 3111 and the second roller 350 are located on the same side of the rack 310, that is, the limiting portion 3111 is located on the front side of the rack 310. The limiting portion 3111 is configured as a protrusion structure and protrudes towards the front side of the rack 310. The projections of the limiting portion 3111 and the second roller 350 in the vertical direction at least partially overlap. Therefore, when the second roller 350 rolls to the lower end of the rack 310, the second roller 350 abuts against the limiting part 3111, and the limiting part 3111 restricts the second roller 350 from rolling further downward, thereby preventing the second roller 350 from disengaging from the rack 310 and limiting the lowest position of the shelf 200. This avoids the disadvantage of the second roller 350 disengaging from the rack 310 due to human error and prevents damage to the shelf 200.

[0049] Reference Figure 4 and Figure 10 As shown, it can be understood that the rack 310 also has a clearance portion 3113, which is located above the plurality of teeth 3112. Specifically, the clearance portion 3113 is located at the upper end of the rack 310 and at the rear side of the rack 310. Compared to the teeth 3112, the clearance portion 3113 has no tooth structure. When the fourth gear 320 moves upward to the position of the clearance portion 3113, since there is no tooth structure, the fourth gear 320 rotates freely, thereby limiting the fourth gear 320 from moving further upward and preventing the fourth gear 320 from disengaging from the rack 310, thus limiting the highest position of the shelf 200.

[0050] Reference Figure 2 and Figure 10 As shown, it can be understood that along the axial direction of the fourth gear 320, i.e., along the left-right direction, the rack 310 is located on one side of the shelf 200. Specifically, taking the rack 310 located on the left side of the shelf 200 as an example, the rack 310 is also provided with a rib 3114. The rib 3114 is arranged in the vertical direction and is located on the right side of the multiple teeth 3112. That is to say, the rib 3114 is closer to the other side of the shelf 200 than the teeth 3112. The rib 3114 protrudes in the protruding direction of the teeth 3112, and along the protruding direction of the teeth 3112, the height of the rib 3114 is greater than or equal to the height of the teeth 3112. Therefore, based on the fact that the teeth 3112 face the rear side of the rack 310, when viewed from the front of the shelf 200, the rib 3114 can cover the teeth 3112, making the teeth 3112 visually hidden, which helps to improve the aesthetics of the shelf assembly.

[0051] Reference Figure 6 and Figure 10As shown, it can be understood that the first roller 340 abuts against the rib 3114 and can roll along the rib 3114, thereby ensuring that the tooth 3112 and the first roller 340 are staggered to avoid interference, and the rib 3114 provides stable support for the first roller 340 to ensure that the fourth gear 320 and the rack 310 are always in the best meshing state.

[0052] Reference Figure 10 As shown, the rack 310 includes a body 311 and a decorative cover 312. The body 311 is arranged vertically, and the rack 3112, limiting part 3111, clearance part 3113, and protruding rib 3114 are all provided on the body 311. The body 311 is also provided with multiple fixing holes 3115, which are spaced apart vertically. Along the central axis of the fixing holes 3115, one side wall of the body 311 is a mounting wall 3116. Taking the left side of the body 311 as an example, the left side wall of the body 311 is the mounting wall 3116, which fits against the left inner wall of the housing, thereby positioning the body 311 in the left-right direction. The decorative cover 312 is detachably connected to the other side of the body 311, that is, the decorative cover 312 is connected to the right side of the body 311. The decorative cover 312 and the body 311 can be connected by a snap-fit ​​structure. The decorative cover 312 is used to cover multiple fixing holes 3115. Therefore, after the main body 311 is fixed to the inner wall of the housing by multiple screws that pass through the multiple fixing holes 3115 respectively, the decorative cover 312 is installed on the right side of the main body 311, so that the decorative cover 312 covers multiple screws, thereby exposing the wall screws, which helps to further improve the aesthetics of the shelf assembly.

[0053] In other embodiments, it is understood that, compared to the previous embodiment, the two racks 310 are closer to one end of the shelf 200 in the left-right direction, and the two racks 310 are located on the front and rear sides of the shelf 200, respectively. The first roller 340 is further away from the other end of the shelf 200 than the second roller 350. In this way, the first roller 340 and the second roller 350 can also provide guidance for the lifting and lowering movement of the shelf 200, and the second shaft portion 360 restricts the shelf 200 from flipping upward, thereby effectively preventing the shelf 200 from tipping downward and preventing the shelf 200 from being lifted upward, which will not be described in detail here.

[0054] Reference Figure 1 and Figure 8As shown, it can be understood that the drive mechanism 400 is mounted on one of the support bases 100 and is used to drive the transmission shaft 330 to rotate. Taking the support base 100 at the left end of the shelf 200 as an example, the structure of the drive mechanism 400 will be described in detail. Specifically, the drive mechanism 400 includes a drive member 410, a rotating shaft module 420, a first gear 430, a second gear 440, and an elastic constraint member 450. The rotating shaft module 420 is configured as a fixed shaft 421, which is fixedly connected to the support base 100, and the central axis of the fixed shaft 421 is arranged in the left-right direction. The first gear 430 and the second gear 440 are rotatably mounted on the fixed shaft 421 and located on the outside of the support base 100. The second gear 440 is located on the side of the first gear 430 away from the support base 100. Here, the outside of the support base 100 is the side of the two support bases 100 that are opposite to each other in the left-right direction, and the side of the two support bases 100 that are arranged opposite each other in the left-right direction is the inside of the support base 100. The elastic constraint member 450 is sleeved on the fixed shaft 421 and configured to clamp the fixed shaft 421 by its own elastic deformation. The first gear 430 and the second gear 440 are connected by transmission through the elastic constraint member 450.

[0055] Reference Figure 1 As shown, the drive component 410 is mounted on the support base 100 and is connected to the first gear 430 for driving the first gear 430 to rotate. Specifically, the drive component 410 includes a handle 411 and a third gear 412. The handle 411 is rotatably mounted on the support base 100 and located inside the support base 100. The third gear 412 is located outside the support base 100 and is fixedly connected to the handle 411, meaning the third gear 412 can rotate with the handle 411, and the third gear 412 meshes with the first gear 430. Therefore, the user can drive the handle 411 to rotate by hand, and the handle 411 drives the first gear 430 to rotate through the third gear 412, facilitating operation.

[0056] Reference Figure 1 As shown, it can be understood that the handle 411 is located on the left side of the housing and near the front end, making it convenient for the user to operate the handle 411 with their right hand without having to reach into the housing. At the same time, because the handle 411 is mounted on the support base 100, the handle 411 can rise and fall with the shelf 200, allowing the user to more clearly perceive changes in the height of the shelf 200 and accurately adjust its height position.

[0057] In other embodiments, the drive element 410 may be an electric mechanism, such as a motor, a rotary cylinder, etc., as long as it can drive the first gear 430 to rotate.

[0058] Reference Figure 1As shown, it can be understood that, in the axial direction of the fixed shaft 421, the third gear 412 does not need to pass over the second gear 440 to mesh with the first gear 430, which can reduce the amount of material used and reduce the axial dimension of the drive component 410. At the same time, it is beneficial to enhance the meshing strength between the first gear 430 and the third gear 412.

[0059] Reference Figure 1 and Figure 2 As shown, it can be understood that the second gear 440 is connected to the lifting mechanism 300 via a transmission, thereby driving the lifting mechanism 300 to operate. Specifically, the shelf assembly also includes a transmission mechanism 500, which is mounted on the same support base 100 as the drive mechanism 400, i.e., the transmission mechanism 500 is mounted on the left side of the support base 100. The transmission mechanism 500 is configured as a reduction gearbox, which consists of multiple transmission gears forming a multi-stage gear transmission, with a total transmission ratio greater than 1. The transmission gear at the input end of the reduction gearbox meshes with the second gear 440, and the transmission gear at the output end of the reduction gearbox is fixedly connected to the transmission shaft 330. Therefore, the second gear 440 is connected to the lifting mechanism 300 via the reduction gearbox. When the second gear 440 rotates, it can drive the transmission shaft 330 to rotate via the reduction gearbox, thereby adjusting the height position of the shelf 200. It is easy to understand that when the transmission shaft 330 rotates, it can also drive the second gear 440 to rotate via the reduction gearbox.

[0060] Reference Figures 4 to 6As shown, it can be understood that, specifically, the transmission gears of the transmission mechanism 500 include a first gear set 430, a second gear set 440, a fifth gear 510, and a sixth gear 520. The first gear set 430 and the fifth gear 510 are located on one side of the support base 100, and the second gear set 440 and the sixth gear 520 are located on the other side of the support base 100. Specifically, the support base 100 includes a support plate 110 perpendicular to the left-right direction. The first gear set 430 and the fifth gear 510 are located on the left side of the support plate 110, and the second gear set 440 and the sixth gear 520 are located on the right side of the support plate 110. The first gear set 430 includes a seventh gear 530 and an eighth gear 540 fixedly connected. The seventh gear 530 and the eighth gear 540 are coaxially arranged and rotatably mounted on the support plate 110. The pitch circle diameter of the seventh gear 530 is larger than that of the eighth gear 540, and the number of teeth of the seventh gear 530 is greater than the number of teeth of the eighth gear 540. The fifth gear 510 and the sixth gear 520 are coaxially arranged and fixedly connected, and the combination of the fifth gear 510 and the sixth gear 520 is rotatably engaged with the support plate 110. The second gear set 440 includes a ninth gear 550 and a tenth gear 560, which are rotatably mounted on the support plate 110, and the ninth gear 550 and the tenth gear 560 mesh. The pitch circle diameter of the ninth gear 550 is larger than that of the tenth gear 560, and the number of teeth of the ninth gear 550 is greater than the number of teeth of the tenth gear 560.

[0061] Reference Figures 4 to 6 As shown, it can be understood that the seventh gear 530 meshes with the second gear 440, thereby driving the structure in a transmission connection with the first gear 430 group. The eighth gear 540 meshes with the fifth gear 510, thereby achieving a transmission connection between the first gear 430 group and the fifth gear 510. The sixth gear 520 meshes with the ninth gear 550, thereby achieving a transmission connection between the second gear 440 group and the sixth gear 520. The tenth gear 560 is fixedly connected to the drive shaft 330, thereby achieving a transmission connection between the second gear 440 group and the lifting mechanism 300.

[0062] Therefore, when the second gear 440 of the drive mechanism 400 rotates, the second gear 440, the seventh gear 530, the eighth gear 540, the fifth gear 510, the sixth gear 520, the ninth gear 550 and the tenth gear 560 are driven in sequence to reduce speed and increase torque, thereby driving the drive shaft 330 to rotate and adjusting the height position of the shelf 200.

[0063] By placing the first gear 430 group and the fifth gear 510 of the transmission mechanism 500 on the left side of the support base 100, and placing the second gear 440 group and the sixth gear 520 on the right side of the support base 100, the axial thickness of the part of the structure located on one side of the support base 100 in the transmission mechanism 500 can be reduced. The axial thickness is the dimension along the axial direction of the transmission shaft 330. By optimizing the layout of the first gear 430 group and the second gear 440 group, the empty space between the first gear 430 group and the support plate 110 is reduced, that is, the empty space in the transmission mechanism 500 is reduced, thereby reducing the overall volume of the transmission mechanism 500, reducing the space occupied, and facilitating installation and layout.

[0064] It is understandable that reducing the axial thickness of the transmission mechanism 500 located on the outside (i.e. left side) of the support base 100 can reduce the width of the entire shelf assembly in the axial direction of the transmission shaft 330, thereby reducing the overall space occupied by the shelf assembly and improving the space utilization rate inside the housing.

[0065] Reference Figure 6 and Figure 7 As shown, the transmission mechanism 500 also includes a third shaft portion 590. The support plate 110 has a shaft hole 111, through which the third shaft portion 590 passes and rotatably engages with the support plate 110. The fifth gear 510 and the sixth gear 520 are respectively connected to both ends of the third shaft portion 590. Specifically, the fifth gear 510, the sixth gear 520, and the third shaft portion 590 are an integral structure, with the third shaft portion 590 located between the fifth gear 510 and the sixth gear 520. For example, the fifth gear 510, the sixth gear 520, and the third shaft portion 590 can be cast as a single unit using a casting process. This facilitates manufacturing and allows for the simultaneous installation of the fifth gear 510, the sixth gear 520, and the third shaft portion 590 onto the support plate 110 during assembly, simplifying the process.

[0066] Reference Figure 6 and Figure 7 As shown, it can be understood that, to meet the installation requirements of the integrated structure of the fifth gear 510, the sixth gear 520, and the third shaft portion 590, the addendum circle diameter of the fifth gear 510 is larger than that of the sixth gear 520, and the outer diameter of the third shaft portion 590 is greater than or equal to the addendum circle diameter of the sixth gear 520. Therefore, when installing the integrated structure of the fifth gear 510, the sixth gear 520, and the third shaft portion 590, the sixth gear 520 and the third shaft portion 590 are sequentially passed through the shaft hole 111 from the left side of the support plate 110 until the fifth gear 510 and the sixth gear 520 are respectively located on both sides of the support plate 110, which facilitates installation.

[0067] Reference Figure 6 and Figure 7As shown, it can be understood that the third shaft portion 590 and the shaft hole 111 are clearance-fitted to achieve rotational engagement between the third shaft portion 590 and the support plate 110. Along the central axis of the fifth gear 510, the length of the third shaft portion 590 is greater than the thickness of the support plate 110, so as to fully utilize the thickness of the support plate 110, improve the stability of the rotational engagement between the third shaft portion 590 and the support plate 110, and ensure that there are certain gaps between the fifth gear 510 and the support plate 110, and between the sixth gear 520 and the support plate 110, reducing the rotational resistance of the fifth gear 510 and the sixth gear 520, thereby adjusting the height position of the shelf 200.

[0068] In other embodiments, it is understood that the fifth gear 510, the sixth gear 520, and the third shaft portion 590 can be a separate structure. Specifically, the third shaft portion 590 passes through the shaft hole 111 of the support plate 110, and both ends of the third shaft portion 590 extend out from both sides of the support plate 110. For example, a bearing is provided between the third shaft portion 590 and the support plate 110 to achieve a rotational engagement between the third shaft portion 590 and the support plate 110. The fifth gear 510 and the sixth gear 520 are respectively fixedly connected to both ends of the third shaft portion 590. This achieves the coaxial arrangement and fixed connection of the fifth gear 510 and the sixth gear 520, enabling them to rotate synchronously.

[0069] Reference Figure 5 As shown, it can be understood that the second gear 440 set is located on the right side of the support plate 110, that is, on the side of the support plate 110 facing the center of gravity of the shelf 200, that is, the second gear 440 set is located on the inner side of the support plate 110. Furthermore, the second gear 440 set is close to the rear end of the shelf 200. It is easy to understand that, in the left-right direction, the space between the two support seats 100 is usually used for storing items. Positioning the second gear 440 set close to the rear end of the shelf 200 avoids the second gear 440 set occupying the front space inside the housing, making it convenient for the user to store items.

[0070] Reference Figure 1 and Figure 3As shown, the transmission mechanism 500 also includes a first cover 570 and a second cover 580. The first cover 570 is located on the left side of the support plate 110, and the second cover 580 is located on the right side of the support plate 110. The first cover 570 covers the first gear 430 group and the fifth gear 510. It also covers the first gear 430 and the second gear 440, and is fixedly connected to the support plate 110. Similarly, the second cover 580 covers the second gear 440 group and the sixth gear 520, and is fixedly connected to the support plate 110. Therefore, by providing the first cover 570 and the second cover 580, the gears can be protected, preventing dust and other foreign objects from flying between the gears and affecting their normal rotation, thus ensuring transmission reliability.

[0071] Understandably, since the second cover 580 is located inside (i.e., on the right side) of the support plate 110 and below the shelf 200, when items are placed below the second cover 580, during the descent of the shelf 200, when the second cover 580 comes into contact with the items, the items will hinder the shelf 200 from moving further downward. The user needs to remove the items before further adjusting the shelf 200, which is inconvenient. If the user forcibly adjusts it, it may damage the items or the second cover 580.

[0072] Therefore, referring to Figure 3 As shown, it can be understood that the lower end of the second cover 580 is provided with a clearance wall 581, and the distance between the clearance wall 581 and the support plate 110 in the direction of the central axis of the fifth gear 510 (i.e., the left-right direction) increases from bottom to top. For example, the clearance wall 581 is configured as a slope or an arc surface, and the upper end of the clearance wall 581 is farther away from the support plate 110 than the lower end, so that the clearance wall 581 has a guiding function in the left-right direction. During the descent of the shelf 200, when the shelf 200 descends to the point where the second cover 580 contacts the item, the item abuts against the clearance wall 581. As the shelf 200 descends further, under the guidance of the clearance wall 581, the item moves away from the second cover 580 along the central axis of the fifth gear 510, that is, the item moves to the right. This causes the second cover 580 and the item to be staggered in the left and right direction, thereby effectively preventing the item from obstructing the shelf 200 from moving further downward. This makes it convenient for the user to adjust the shelf 200 to the target height position and effectively protects the item and the second cover 580.

[0073] Reference Figure 3As shown, it can be understood that the clearance wall 581 is located at the front end of the second cover 580, and the distance between the clearance wall 581 and the support plate 110 in the direction of the central axis of the fifth gear 510 (i.e., the left-right direction) increases from front to back. The front end of the clearance wall 581 is closer to the support plate 110 than the rear end. Therefore, the clearance wall 581 also has a guiding function in the front-back direction. During the descent of the shelf 200, when the shelf 200 descends to the point where the second cover 580 contacts the item, the item abuts against the clearance wall 581. As the shelf 200 descends further, under the guiding action of the clearance wall 581, the item can move forward. Similarly, the second cover 580 and the item are staggered in the front-back direction, thereby effectively preventing the item from obstructing the shelf 200 from moving further downward, making it convenient for the user to adjust the shelf 200 to the target height position, and effectively protecting the item and the second cover 580. In this way, during the descent of shelf 200, items can be kept away from the second cover 580 in both the left and right and front and back directions, thus improving reliability.

[0074] Reference Figure 4 and Figure 5 As shown, it can be understood that the central axis of one of the transmission gears in the transmission mechanism 500 is close to the rack 310, and the second shaft portion 360 is coaxially arranged with this transmission gear. For example, the central axis of the ninth gear 550 is close to the rack 310. The ninth gear 550 is rotatably mounted on the right side of the support plate 110, and the second shaft portion 360 is located on the side of the support plate 110 opposite to the ninth gear 550, that is, the second shaft portion 360 is mounted on the left side of the support plate 110, and the ninth gear 550 and the second shaft portion 360 are coaxially arranged. Alternatively, the second shaft portion 360 is mounted on the support plate 110 and extends out from the left and right sides of the support plate 110, and the ninth gear 550 is rotatably mounted on the second shaft portion 360 and located on the right side of the support plate 110. Therefore, the layout of the second shaft portion 360 and the transmission mechanism 500 on the support plate 110 is more compact, eliminating the need to reserve additional space on the support plate 110 for mounting the second shaft portion 360, thereby reducing the space occupied by the shelf assembly.

[0075] It is understandable that the second shaft 360 and the ninth gear 550 are an integral structure. For example, the second shaft 360 and the ninth gear 550 can be cast together using a casting process. This facilitates production and processing, and also allows the second shaft 360 and the ninth gear 550 to be installed on the support plate 110 in one go during assembly, making assembly convenient.

[0076] Reference Figure 8 and Figure 9As shown, it can be understood that the elastic constraint 450 is configured as a spring hoop, i.e., a torsion spring. Specifically, the elastic constraint 450 is formed by winding spring wire and includes an elastic main body 451, a first connecting part 452, and a second connecting part 453. The elastic main body 451 is a helical spring structure, and the first connecting part 452 and the second connecting part 453 are respectively connected to the two ends of the helical spring structure and extend outward along the radial direction of the helical spring structure.

[0077] Reference Figure 8 and Figure 9 As shown, it can be understood that the elastic main body 451 is sleeved on the fixed shaft 421 and located between the first gear 430 and the second gear 440. The elastic main body 451 has high elasticity. When there is no force, the elastic main body 451 is in an inward contraction state. That is to say, the elastic main body 451 can use its own elastic deformation to provide a radially inward force on the fixed shaft 421, thereby increasing the friction between the elastic main body 451 and the fixed shaft 421, so that the elastic main body 451 clamps the fixed shaft 421 and the elastic main body 451 and the fixed shaft 421 are relatively fixed, that is, the elastic constraint member 450 is self-locking.

[0078] Reference Figure 8 and Figure 9 As shown, it can be understood that the first gear 430 and the second gear 440 are connected by an elastic constraint member 450. That is, when the elastic constraint member 450 is released from its self-locking state, the first gear 430 can drive the second gear 440 to rotate through the elastic constraint member 450. A first transmission part 431 is provided on the side of the first gear 430 facing the second gear 440, and the first transmission part 431 has an arc-shaped structure that is generally larger than a semicircle. Correspondingly, a second transmission part 441 is provided on the side of the second gear 440 facing the first gear 430, and the second transmission part 441 has an arc-shaped structure that is generally smaller than a semicircle.

[0079] Reference Figure 8 and Figure 9As shown, it can be understood that the first connecting portion 452 and the second connecting portion 453 of the elastic constraint member 450 are arranged circumferentially around the elastic main body portion 451, and the elastic constraint member 450 is configured to release the clamping of the fixed shaft 421 when the first connecting portion 452 and the second connecting portion 453 approach each other circumferentially around the elastic main body portion 451. That is, when the first connecting portion 452 and the second connecting portion 453 approach each other circumferentially around the elastic main body portion 451, the spring wires at both ends of the axial direction of the elastic main body portion 451 expand outward, the elastic constraint member 450 deforms, that is, the maximum inner diameter of the elastic constraint member 450 increases, thereby reducing the friction between the elastic main body portion 451 and the fixed shaft 421, so that the elastic constraint member 450 can rotate relative to the fixed shaft 421, that is, the clamping of the fixed shaft 421 is released. The inner diameter of the elastic constraint 450 here is the inner diameter of the space surrounded by the helical spring structure (i.e., the elastic main body 451). When the spring wires at both ends of the elastic main body 451 expand outward, the inner diameter of the space surrounded by the spring wires at both ends of the elastic main body 451 is the maximum inner diameter.

[0080] It is easy to understand that when the first connecting part 452 and the second connecting part 453 move away from each other along the circumference of the elastic body part 451, the spring wires at both ends of the axial direction of the elastic body part 451 tend to contract inward, thereby further increasing the friction between the elastic body and the fixed shaft 421, and causing the elastic constraint member 450 to further clamp the fixed shaft 421.

[0081] Reference Figure 8 and Figure 9 As shown, it can be understood that, along the circumference of the elastic main body 451, the first transmission part 431 is located outside the first connecting part 452 and the second connecting part 453, that is, the first transmission part 431 is located on the side opposite to the first connecting part 452 and the second connecting part 453, so that both ends of the first transmission part 431 can abut against the first connecting part 452 or the second connecting part 453. The second transmission part 441 is located inside the first connecting part 452 and the second connecting part 453, that is, the second transmission part 441 is located between the first connecting part 452 and the second connecting part 453. Specifically, when the elastic constraint member 450 releases its self-locking mechanism and the first gear 430 drives the shelf 200 to rise, the first gear 430 drives the second gear 440 to rotate via the elastic constraint member 450. The first transmission part 431 is connected to the second transmission part 441 via the first connecting part 452. In other words, at this time, the first transmission part 431 of the first gear 430 applies a driving force to the second transmission part 441 of the second gear 440 through the first connecting part 452 to drive the second gear 440 to rotate. Specifically, at this time, the first connecting part 452 is located between the first transmission part 431 and the second transmission part 441 along the circumference of the elastic main body part 451.

[0082] Therefore, when the driving member 410 drives the first gear 430 to rotate, the first transmission part 431 of the first gear 430 drives one of the first connecting part 452 and the second connecting part 453 to move circumferentially along the elastic body part 451. The other of the first connecting part 452 and the second connecting part 453 remains stationary at the beginning of the rotation of the first gear 430 because the elastic body part 451 is relatively fixed to the fixed shaft 421. As the first gear 430 rotates further, the first connecting part 452 and the second connecting part 453 move closer to each other circumferentially along the elastic body part 451, the maximum inner diameter of the elastic constraint member 450 increases, and the elastic constraint member 450 releases its clamping on the fixed shaft 421, so that the elastic constraint member 450 can rotate with the first gear 430.

[0083] When the first gear 430 is stationary, that is, the driving member 410 does not drive the first gear 430 to rotate, the elastic constraint member 450 is not under force, and the elastic main body 451 uses its own elastic deformation to provide a radial inward force on the fixed shaft 421, thereby increasing the friction between the elastic main body 451 and the fixed shaft 421, so that the elastic main body 451 clamps the fixed shaft 421, and the elastic main body 451 and the fixed shaft 421 are relatively fixed, that is, the elastic constraint member 450 is self-locking.

[0084] Understandably, when the first gear 430 is stationary, the elastic constraint member 450 self-locks. Under the gravity of the shelf 200 and the support base 100, the shelf 200 tends to descend, causing the fourth gear 320 to tend to rotate. The fourth gear 320 transmits force to the second gear 440 through the reduction gearbox, causing the second gear 440 to tend to rotate in the opposite direction (the rotation direction of the second gear 440 is positive when the shelf 200 rises). The second transmission part 441 of the second gear 440 applies a force toward the first transmission part 431 to the first connecting part 452. The second connecting part 453 remains stationary because the elastic body part 451 and the fixed shaft 421 are relatively fixed. This causes the first connecting part 452 and the second connecting part 453 to tend to move away from each other along the circumference of the elastic body part 451. The spring wires at both ends of the axial direction of the elastic body part 451 tend to contract inward, thereby further increasing the friction between the elastic body and the fixed shaft 421, causing the elastic constraint member 450 to further clamp the fixed shaft 421.

[0085] Reference Figure 2 , Figure 8 and Figure 9As shown, from the left view of the shelf assembly, when the shelf 200 needs to be adjusted upwards, the drive member 410 drives the first gear 430 to rotate clockwise. The first transmission part 431 of the first gear 430 drives the first connecting part 452 to move closer to the second connecting part 453. The elastic constraint member 450 releases the clamping of the fixed shaft 421. The elastic constraint member 450 rotates with the first gear 430 and rotates further with the first gear 430. The first connecting part 452 acts on the second transmission part 441 to drive the second gear 440 to rotate clockwise. The second gear 440 drives the fourth gear 320 to rotate clockwise through the reduction gearbox. The fourth gear 320, in cooperation with the rack 310, drives the shelf 200 to move upwards. When the shelf 200 moves to the target height position, the driving force of the drive member 410 is removed, the first gear 430 remains stationary, and the elastic constraint member 450 clamps the fixed shaft 421 by its own elastic deformation, that is, the elastic constraint member 450 is self-locking. The first connecting part 452 restricts the rotation of the second gear 440 by acting on the second transmission part 441, thereby fixing the shelf 200 at the target height position, that is, completing the upward adjustment of the shelf 200.

[0086] When the shelf 200 needs to be adjusted downwards, the drive member 410 drives the first gear 430 to rotate counterclockwise. The first transmission part 431 of the first gear 430 applies a force toward the second transmission part 441 to the second connecting part 453. The first connecting part 452 remains stationary because the elastic body part 451 is relatively fixed to the fixed shaft 421. This causes the second connecting part 453 to move closer to the first connecting part 452 along the circumference of the elastic body part 451. The elastic constraint member 450 releases its clamping on the fixed shaft 421. As the first gear 430 rotates further, the elastic constraint member 450 rotates with the first gear 430. The first connecting part 452 of the elastic constraint member 450 releases its restriction on the rotation of the second gear 440. Therefore, under the weight of the shelf 200, support base 100, and the rack 310, and with the cooperation of the fourth gear 320 and rack 310, both the fourth gear 320 and the second gear 440 rotate counterclockwise. As the first gear 430 rotates further, the fourth gear 320 and the second gear 440 rotate further, causing the shelf 200 to move continuously downward. Alternatively, when the weight of the shelf 200, support base 100, and the rack 200 is insufficient to drive the fourth gear 320 and the second gear 440 to rotate counterclockwise, when the elastic constraint member 450 rotates with the first gear 430, the second connecting part 453 acts on the second transmission part 441 to drive the second gear 440 to rotate counterclockwise. The second gear 440 drives the fourth gear 320 to rotate counterclockwise through the reduction gearbox, and the cooperation of the fourth gear 320 and rack 310 drives the shelf 200 to move downward. When the shelf 200 moves to the target height position, the driving force of the drive member 410 is removed, the first gear 430 remains stationary, and the elastic constraint member 450 clamps the fixed shaft 421 by its own elastic deformation, that is, the elastic constraint member 450 is self-locking. The first connecting part 452 restricts the rotation of the second gear 440 by acting on the second transmission part 441, thereby fixing the shelf 200 at the target height position, that is, completing the downward adjustment of the shelf 200.

[0087] When the shelf 200 is stationary at the target height, under the combined weight of the shelf 200 and the support 100, if items are placed on the shelf 200, the weight of the items will be superimposed, causing the fourth gear 320 to tend to rotate counterclockwise. The fourth gear 320 transmits the force to the second gear 440 through the reduction gearbox, causing the second gear 440 to also tend to rotate counterclockwise. This causes the first connecting part 452 and the second connecting part 453 to tend to move away from each other circumferentially along the elastic body part 451, thereby increasing the friction between the elastic body and the fixed shaft 421. This causes the elastic constraint member 450 to further clamp the fixed shaft 421, thereby enhancing the stability of the shelf 200 and preventing it from falling. It is easy to understand that within a certain range of force, the greater the weight of the items placed on the shelf 200, the greater the clamping force of the elastic constraint member 450 on the fixed shaft 421, and the more stable the shelf 200.

[0088] It is understandable that, since the elastic main body 451 sleeved on the fixed shaft 421 can clamp the fixed shaft 421 at any relative position along the circumference, the shelf 200 can be fixed at any height position within the set height range, that is, the shelf 200 can be adjusted to any height position to achieve stepless adjustment, which is convenient for users.

[0089] Understandably, since the drive mechanism 400 and the lifting mechanism 300 are connected by a reduction gearbox, on the one hand, the lifting speed of the shelf 200 can be reduced to accurately adjust the height of the shelf 200; on the other hand, the torque output to the drive shaft 330 can be increased to meet the needs of heavy load conditions. Furthermore, for users adjusting the shelf 200 by rotating the handle 411, this reduces the force required and simplifies operation.

[0090] In other embodiments, it is understood that during the upward adjustment of the shelf 200, the first connecting part 452 acts on the second transmission part 441 to drive the second gear 440 to rotate; when the shelf 200 is stationary at the target height position, the first connecting part 452 acts on the second transmission part 441 to restrict the rotation of the second gear 440. To improve the stability of the engagement between the first connecting part 452 and the second transmission part 441, the first connecting part 452 is configured as a hook-shaped structure with its opening facing the second transmission part 441. The hook-shaped structure engages with the second transmission part 441, thereby increasing the contact area between them and increasing the friction. This reduces the risk of the first connecting part 452 deforming and slipping off the second transmission part 441 during upward adjustment of the shelf 200 or when the shelf 200 is stationary at the target height, thus improving the stability of the engagement and enhancing the reliability of the shelf 200 during upward adjustment or when the shelf 200 is stationary. Furthermore, because the first connecting part 452 is less prone to deformation, it can withstand heavy loads, improving the overall load-bearing capacity of the shelf assembly.

[0091] In other embodiments, it is understood that the second connecting portion 453 may also be configured as a hook-shaped structure, with the opening of the hook-shaped structure facing the second transmission portion 441 and used to fasten to the second transmission portion 441. During the downward adjustment of the shelf 200, when the second connecting portion 453 needs to act on the second transmission portion 441 to drive the second gear 440 to rotate counterclockwise, the hook-shaped second connecting portion 453 fastens to the second transmission portion 441, thereby increasing the contact area between the second connecting portion 453 and the second transmission portion 441, that is, increasing the friction between the second connecting portion 453 and the second transmission portion 441, reducing the risk of the second connecting portion 453 deforming and slipping off the second transmission portion 441, thereby improving the stability of the fit between the second connecting portion 453 and the second transmission portion 441, and thus improving the reliability of the downward adjustment shelf 200.

[0092] In other embodiments, it is understood that both the first connecting portion 452 and the second connecting portion 453 are configured as hook-shaped structures, which will not be described in detail here.

[0093] Reference Figure 8 and Figure 9As shown, it can be understood that a first groove 432 is provided on the side wall of the first gear 430 facing the second gear 440. Along the circumference of the fixed shaft 421, the first groove 432 is approximately an arc-shaped structure smaller than a semicircle. A first transmission part 431 is formed on the outer side of the first groove 432 along the circumference of the fixed shaft 421 within the first gear 430. A first connecting part 452 and a second connecting part 453 are located between two oppositely arranged side walls of the first groove 432 along the circumference of the fixed shaft 421. This structure results in a smaller axial dimension for the first gear 430, which helps to reduce the space occupied, i.e., reduce the space occupied by the shelf assembly, improve the space utilization within the housing, and reduce material usage.

[0094] Reference Figure 8 and Figure 9 As shown, it can be understood that the inner peripheral wall of the first gear 430 is also provided with a receiving groove 433. The receiving groove 433 is annular and communicates with the first groove 432. The elastic main body 451 is located in the receiving groove 433. This allows the elastic main body 451 to not occupy the space between the first gear 430 and the second gear 440, thereby reducing the axial dimension of the drive mechanism 400 in the first gear 430, further reducing the space occupied, that is, reducing the space occupied by the shelf assembly, and improving the space utilization rate within the housing.

[0095] Reference Figure 8 As shown, it can be understood that the second transmission part 441 protrudes from the side wall of the second gear 440 facing the first gear 430, that is, the second transmission part 441 is a protrusion structure, and the first connecting part 452 and the second connecting part 453 are located on both sides of the protrusion structure along the circumference of the fixed shaft 421. This facilitates the machining of the second gear 440.

[0096] Reference Figure 8 and Figure 9 As shown, it can be understood that at least a portion of the structure of the second transmission part 441 is accommodated in the first groove 432. For example, the second transmission part 441, which has a protrusion structure, is completely accommodated in the first groove 432, so that the first gear 430 and the second gear 440 are in contact. This can further reduce the axial dimension of the drive mechanism 400 in the first gear 430, further reduce the space occupied, that is, reduce the space occupied by the shelf assembly, and improve the space utilization rate within the housing.

[0097] In other embodiments, it is understood that the second transmission part 441 with a protrusion structure can also be partially accommodated in the first groove 432, which can reduce the axial distance between the first gear 430 and the second gear 440 to a certain extent, and can also further reduce the size of the drive mechanism 400 in the axial direction of the first gear 430, further reduce the space occupied, that is, reduce the space occupied by the shelf assembly and improve the space utilization rate inside the housing.

[0098] Reference Figure 4 , Figure 8 and Figure 9 As shown, it can be understood that by accommodating at least a portion of the second transmission part 441, which has a protrusion structure, within the first groove 432, the first transmission part 431 and the second transmission part 441 can directly transmit torque in the circumferential direction of the fixed shaft 421. Therefore, when the shelf 200 is adjusted upwards or downwards and requires transmission via the second connecting part 453, the first connecting part 452 or the second connecting part 453 can be clamped between the first transmission part 431 and the second transmission part 441 in the circumferential direction of the fixed shaft 421, preventing the first connecting part 452 or the second connecting part 453 from slipping off and effectively ensuring the reliability of torque transmission between the first gear 430 and the second gear 440.

[0099] In other embodiments, it is understood that the first transmission part 431 may also be configured as a protrusion structure protruding towards the second gear 440, and the second gear 440 may also be configured to form the second transmission part 441 by providing a groove, which will not be described in detail here.

[0100] In other embodiments, it is understood that the elastic constraint 450 is configured to release the clamping fixing shaft 421 when the first connecting portion 452 and the second connecting portion 453 move away from each other circumferentially along the elastic body portion 451. Correspondingly, the first transmission portion 431 has an arc-shaped structure that is generally smaller than a semicircle and is located inside the first connecting portion 452 and the second connecting portion 453, that is, the first transmission portion 431 is located between the first connecting portion 452 and the second connecting portion 453. The second transmission portion 441 has an arc-shaped structure that is generally larger than a semicircle and is located outside the first connecting portion 452 and the second connecting portion 453, that is, the second transmission portion 441 is located on the side opposite to the first connecting portion 452 and the second connecting portion 453. Therefore, when the first gear 430 rotates, it can also release the elastic constraint member 450 from clamping the fixed shaft 421; when the first gear 430 is stationary, the elastic constraint member 450 clamps the fixed shaft 421 by its own elastic deformation, and when the second gear 440 has a tendency to rotate, the second gear 440 can further clamp the fixed shaft 421 with the elastic constraint member 450. Further details are omitted here.

[0101] In other embodiments, it is understood that the elastic body portion 451 may also be a ring structure rather than a spiral structure, or an open ring structure.

[0102] The storage device according to a second aspect of this utility model includes a housing and a shelf assembly according to a first aspect of this utility model. The shelf assembly is installed inside the housing and is used to support items, so that the items inside the storage device can be placed in layers to improve space utilization. The storage device can be a refrigerator, wine cabinet, display cabinet, etc.

[0103] Since the storage equipment adopts all the technical solutions of the shelf assembly of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments.

[0104] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A shelf assembly, characterized in that, include: Support base; Shelf, mounted on the support base; A lifting mechanism is connected to the support base to drive the support base to rise and fall. The transmission mechanism includes a first gear set, a second gear set, a fifth gear, and a sixth gear. The first gear set and the fifth gear are located on one side of the support base and are connected to the fifth gear in a transmission manner. The second gear set and the sixth gear are located on the other side of the support base and are connected to the sixth gear and the lifting mechanism in a transmission manner. The fifth gear and the sixth gear are coaxially arranged and fixedly connected, and the fifth gear is rotatably engaged with the support base. The drive mechanism is connected to the first gear set to drive the shelf to rise and fall via the lifting mechanism.

2. The shelf assembly according to claim 1, characterized in that: The transmission mechanism further includes a third shaft portion, the support base includes a support plate, the support plate is provided with a shaft hole, the third shaft portion passes through the shaft hole and rotates with the support plate, and the fifth gear and the sixth gear are respectively connected to the two ends of the third shaft portion.

3. The shelf assembly according to claim 2, characterized in that: The fifth gear, the sixth gear, and the third shaft are an integral structure.

4. The shelf assembly according to claim 3, characterized in that: The tip circle diameter of the fifth gear is greater than that of the sixth gear, and the outer diameter of the third shaft is greater than or equal to that of the sixth gear.

5. The shelf assembly according to claim 2 or 3, characterized in that: Along the direction of the central axis of the fifth gear, the length of the third shaft is greater than the thickness of the support plate.

6. The shelf assembly according to claim 1, characterized in that: The second gear set is located on the side of the support facing the center of gravity of the shelf, and the second gear set is close to the rear end of the shelf.

7. The shelf assembly according to claim 1, characterized in that: The transmission mechanism further includes a first cover and a second cover. The first cover covers the first gear set and the fifth gear and is connected to the support base. The second cover covers the second gear set and the sixth gear and is connected to the support base.

8. The shelf assembly according to claim 7, characterized in that: The second cover is located on the side of the support seat facing the center of gravity of the shelf, and the second cover is close to the rear end of the shelf. The lower end of the second cover is provided with a clearance wall, and the distance between the clearance wall and the support seat in the direction of the central axis of the fifth gear increases from bottom to top.

9. The shelf assembly according to claim 8, characterized in that: The clearance wall is located at the front end of the second cover, and the distance between the clearance wall and the support seat in the direction of the central axis of the fifth gear increases from front to back.

10. A storage device, characterized in that, It includes a housing and a shelf assembly as described in any one of claims 1 to 9, the shelf assembly being disposed within the housing.

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