Shelf assembly and refrigeration equipment

Abstract

The storage rack assembly comprises a storage rack, an adjusting mechanism for adjusting the storage rack to move in the vertical direction and a damping mechanism for providing damping for storage rack adjustment, the adjusting mechanism is arranged on the side edge of the storage rack and comprises a rack and a gear, the rack is arranged in the vertical direction, and the gear is arranged on the rack. The gear is rotationally connected with the shelf and is meshed with the rack; the damping mechanism comprises a damping wheel and a damper for providing damping force for the damping wheel, the damping wheel is detachably connected with the damper, and the damping wheel is meshed with the gear; the damping wheel can be replaced according to the bearing capacity of the shelf, and the tooth number and the radius of the damping wheel can be reduced along with the increase of the bearing capacity of the shelf.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration equipment, in particular to a shelf assembly and a refrigeration equipment with the same. BACKGROUND

[0002] When the shelf is adjusted in height by the gear and the rack, the load bearing capacity of the shelf affects the stability of the shelf in the process of descending, wherein the heavier the load bearing capacity of the shelf is, the greater the descending acceleration of the shelf is, and the more unstable the shelf is. SUMMARY

[0003] The present application aims to provide a shelf assembly and a refrigeration equipment, wherein the shelf assembly is provided with a damping wheel engaged with a gear, and a damper provides damping force for the damping wheel, and the damping wheel can be replaced according to the load bearing capacity of the shelf, and the radius and the number of teeth of the damping wheel can be changed, thereby solving the problem of unstable descending of the shelf in the prior art.

[0004] In order to achieve one of the above-mentioned purposes, one embodiment of the present application provides a shelf assembly, comprising:

[0005] a shelf, which is movable in a first direction;

[0006] an adjusting mechanism, which is arranged at a side edge of the shelf, and comprises a rack and a gear, wherein the rack is arranged in the first direction, and the gear is rotatably connected with the shelf and engaged with the rack;

[0007] a damping mechanism, which comprises a damping wheel and a damper providing damping force for the damping wheel, wherein the damping wheel is detachably connected with the damper, and the damping wheel is engaged with the gear;

[0008] wherein the pitch circle radius r1 and the number of teeth z1 of the damping wheel satisfy the following formula:

[0009]

[0010] wherein k and b are constants in the damping and rotational speed relationship formula of the damper, g is the acceleration of gravity, m is a preset load bearing capacity of the shelf, r2 is the pitch circle radius of the gear, z2 is the number of teeth of the gear, and v is the descending speed of the preset shelf.

[0011] As a further improvement of the one embodiment of the present application, the shelf comprises a shelf plate and a connecting piece connected to a side edge of the shelf plate, and the connecting piece is provided with a through hole;

[0012] the damping wheel is provided with a non-circular hole, the damper is provided with a non-cylindrical column matched with the non-circular hole, and the non-cylindrical column passes through the through hole and the non-circular hole in sequence to realize the connection between the damping wheel and the damper.

[0013] As a further improvement of the embodiment of the present application, a synchronous mechanism is further included, which comprises a synchronous rod and synchronous wheels arranged at both ends of the synchronous rod, and the synchronous wheels are engaged with the gear.

[0014] As a further improvement of the embodiment of the present application, a limiting mechanism is further included, which comprises a ratchet wheel coaxially arranged with the synchronous wheel and a movable rod, and the movable rod comprises a locking position matched with the ratchet wheel to limit the rotation of the ratchet wheel when the shelf moves downward and a release position separated from the ratchet wheel.

[0015] As a further improvement of the embodiment of the present application, the diameter of the gear is greater than the diameter of the synchronous wheel.

[0016] As a further improvement of the embodiment of the present application, the connecting piece is provided with a mounting hole, and the synchronous wheel is connected with the ratchet wheel by penetrating the mounting hole away from the synchronous rod.

[0017] As a further improvement of the embodiment of the present application, the adjusting mechanism is arranged close to the rear end of the shelf, the movable rod is movable in the front-rear direction and is provided with a convex ring.

[0018] The limiting mechanism is further provided with an elastic member and a limiting block connected with the connecting piece, the limiting block is provided with a limiting hole matched with the cross section of the movable rod, the movable rod penetrates the limiting hole, and the front end of the elastic member abuts against the rear end of the limiting block and the convex ring.

[0019] As a further improvement of the embodiment of the present application, the ratchet wheel has an arc-shaped contour, and the movable rod is provided with a circular sleeve at one end close to the ratchet wheel, and the circular sleeve is made of elastic material.

[0020] As a further improvement of the embodiment of the present application, the connecting piece comprises a horizontal supporting part for supporting the shelf and a side part connected with the supporting part.

[0021] The movable rod is provided with a wrench at one end away from the ratchet wheel, and the rear end of the wrench abuts against the front end of the side part when the movable rod is in the locking position.

[0022] The embodiment of the present application further provides a refrigeration device, which comprises a box body provided with a refrigeration compartment and a shelf assembly arranged in the refrigeration compartment, and the shelf assembly is the shelf assembly as described above.

[0023] The one or more technical solutions provided by the present application have at least the following technical effects or advantages:

[0024] The shelf assembly provided by the present invention is provided with a damping wheel meshing with a gear, and the damper provides damping force for the damping wheel. The damping wheel and the damper are detachably connected. When the acceleration of the shelf descent is 0, the load-bearing capacity of the shelf is inversely proportional to the radius and number of teeth of the damping wheel. Therefore, the damping wheel can be removed and replaced according to the load-bearing capacity of the shelf, thereby changing the radius and / or number of teeth of the damping wheel to ensure the stability of the shelf descent. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 2 is a schematic structural diagram of a shelf assembly in an embodiment of the present invention.

[0026] Figure 2 yes Figure 1 A schematic structural diagram of the middle shelf assembly from another perspective.

[0027] Figure 3 yes Figure 1 Schematic diagram of the coordination of the right-side adjustment mechanism, synchronization mechanism and other mechanisms in the middle shelf assembly.

[0028] Figure 4 yes Figure 3 A structural diagram from another perspective.

[0029] Figure 5 yes Figure 3 Enlarged view of point A in the middle.

[0030] Figure 6 yes Figure 4 It is the side view (inside) of the coordination of the various mechanisms.

[0031] Figure 7 yes Figure 6 Schematic cross-sectional view along line BB.

[0032] Figure 8 yes Figure 7 Enlarged view of point C in the middle.

[0033] Figure 9 This is a schematic diagram showing the shelf being horizontal (left) and the front end of the shelf being raised (right) when the gears, slides, and pulleys cooperate.

[0034] 1, shelf; 11, shelf plate; 12, connecting piece; 121, hanging groove; 122, receiving part; 123, side part; 1231, mounting hole; 2, rack; 3, gear; 4, slide rail; 41, slide groove; 5, sliding block; 51, pulley; 52, fixed column; 6, limiting piece; 61, lock catch; 71, synchronization rod; 72, synchronization wheel; 721, non-circular groove; 722, buckle; 81, ratchet wheel; 811, clearance hole; 8111, abutment surface; 812, positioning hole; 8121, protruding block; 813, pin; 82, movable rod; 821, protruding ring; 823, wrench; 83, spring; 84, limiting block; 841, limiting hole; 91, damping wheel; 92, damper. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0036] The terms such as "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like used herein to indicate spatial relative positions are for the purpose of facilitating illustration to describe the relationship of one unit or feature relative to another unit or feature as shown in the drawings. The spatial relative position terms can be intended to include different orientations of the device in use or in operation in addition to the orientation shown in the drawings.

[0037] For example, if the device in the drawing is turned over, the unit described as being "below" or "under" the other unit or feature will be "above" the other unit or feature. Therefore, the exemplary term "below" can encompass both the upward and downward orientations. The device can be oriented in other ways (rotated 90 degrees or other orientations), and the spatially-related descriptions used herein are interpreted accordingly.

[0038] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] The shelf assembly can be arranged in the refrigeration equipment, and the shelf assembly is arranged in the refrigeration chamber of the refrigeration equipment.

[0040] The shelf assembly comprises a shelf 1, an adjusting mechanism and a damping mechanism, the shelf 1 is movable along a first direction; the adjusting mechanism is arranged at a side of the shelf 1, the adjusting mechanism comprises a rack 2 and a gear 3, the rack 2 is arranged along the first direction, and the gear 3 is rotationally connected with the shelf 1 and engaged with the rack 2; the damping mechanism comprises a damping wheel 91 and a damper 92 providing damping force for the damping wheel 91, the damping wheel 91 is detachably connected with the damper 92, and the damping wheel 91 is engaged with the gear 3; wherein the pitch circle radius r1 and the number of teeth z1 of the damping wheel 91 satisfy the following formula:

[0041]

[0042] Wherein, k and b are constants in the damping and rotational speed relationship formula of the damper, g is the acceleration of gravity, m is the preset load bearing capacity of the shelf 1, r2 is the pitch circle radius of the gear 3, z2 is the number of teeth of the gear 3, and v is the preset descending speed of the shelf 1. Since the shelf assembly is usually adjusted along the vertical direction during use, and the rack 2 and the following slide rail 4 are also arranged along the vertical direction, the following text will replace the first direction with the vertical direction, and the side close to the user during use will be the front, and the left and right directions of the shelf assembly corresponding to the user will be the left and right directions of the shelf assembly.

[0043] Since the rotational speed ω1 and the number of teeth z1 of the damping wheel 91 and the rotational speed ω2 and the number of teeth z2 of the gear 3 satisfy ω1×z1=ω2×z2 (Formula 1), then The descending speed v of the shelf 1 is the linear speed of the gear 3, and the rotational speed ω2 of the gear 3 is r2 is the pitch circle radius of the gear 3, and

[0044] The relationship between the damping T and the rotational speed ω of the damper 92 satisfies the first function T=kω+b, the rotational speed ω of the damper 92 is the rotational speed ω1 of the damping wheel 91, the damping force F output by the damping wheel 91 is T / r1, and r1 is the pitch circle radius of the damping wheel 91. Then the descending acceleration a of the shelf 1 is m is the load bearing capacity of the shelf 1, which is the sum of the weight of the shelf 1 itself and the weight of the objects placed thereon; if the descending speed of the shelf 1 is to be kept unchanged, the descending acceleration a of the shelf 1 is 0, and then

[0045]

[0046] Since the gear 91 is engaged with the rack 3, it cannot be replaced, so only the pitch circle radius r1 and the number of teeth z1 of the damping wheel 91 can be changed. And through formula 4, if the load of the shelf 1 becomes larger, the pitch circle radius r1 and / or the number of teeth z1 of the damping wheel 91 needs to be smaller.

[0047] Further, the shelf 1 comprises a shelf plate 11 and a connecting piece 12 connected to the side of the shelf plate 11, the connecting piece 12 is provided with a through hole; the damping wheel 91 is provided with a non-circular hole, and the damper 92 is provided with a non-circular cylinder matched with the non-circular hole, the non-circular cylinder passes through the through hole and the non-circular hole in turn, realizing the connection of the damping wheel 91 and the damper 92. Thus, the damping wheel 91 can be disassembled from the non-circular cylinder according to the load of the shelf 1 to replace it.

[0048] In some embodiments, the shelf 1 assembly further comprises a synchronization mechanism, the synchronization mechanism comprises a synchronization rod 71 and a synchronization wheel 72 provided at both ends of the synchronization rod 71, and the synchronization wheel 72 is engaged with the gear 3.

[0049] The both ends of the synchronization rod 71 are non-circular, and the synchronization wheel 72 is correspondingly provided with a non-circular groove 721 matched with the non-circular structure of the both ends of the synchronization rod 71, so that the non-circular structure of the both ends of the synchronization rod 71 is inserted into the non-circular groove 721 of the synchronization wheel 72. The synchronization wheel 72 at both ends of the synchronization rod 71 is engaged with the gear 3 on both sides of the shelf 1, and when the shelf 1 is moved up or down, the synchronization of the two sides is better. Of course, in some embodiments, the synchronization wheel 72 and the gear 3 can be combined into one, that is, the both ends of the synchronization rod 71 are connected with the gear 3, which can also achieve the effect of enhancing the synchronization.

[0050] Further, the shelf 1 assembly further comprises a limiting mechanism, the limiting mechanism comprises a ratchet wheel 81 and a movable rod 82, the ratchet wheel 81 is coaxially arranged with the synchronization wheel 72, and the movable rod 82 comprises a locking position matched with the ratchet wheel 81 to limit the rotation of the ratchet wheel 81 when the shelf 1 moves downward, and a release position separated from the ratchet wheel 81.

[0051] As shown in Figure 3 , 5 , the adjusting mechanism is arranged close to the rear end of the shelf 1, the movable rod 82 can move in the front-rear direction, and is provided with a convex ring 821; the limiting mechanism is further provided with a elastic member and a limiting block 84 connected with the connecting piece 12, the limiting block 84 is provided with a limiting hole 841 matched with the cross section of the movable rod 82, the movable rod 82 passes through the limiting hole 841, and the front end of the elastic member abuts against the rear end of the limiting block 84 and the rear end of the limiting block 84 abuts against the convex ring 821.

[0052] The two limit members 6 limit the movement of the movable rod 82 in the front and back directions through the limit holes 841. The elastic member is preferably a spring 83, which is sleeved on the movable rod 82 and cooperates with the limit member 6 at the front end. After the movable rod 82 is forced to move forward, the spring 83 is compressed. After the movable rod 82 loses the force, the restoring force of the spring 83 makes the movable rod 82 move backward to cooperate with the ratchet wheel 81 to lock the ratchet wheel 81, and then lock the relative movement of the gear 3 and the rack 2, so as to lock the position of the shelf 1.

[0053] When the movable rod 82 is in the locking position, if the ratchet wheel 81 rotates counterclockwise (corresponding to the upward movement of the shelf 1) along the arrow direction, Figure 3 the ratchet wheel 81 pushes the movable rod 82 forward. It should be noted that the movable rod 82 can be completely moved to the release position or only partially moved in the direction of the release position to form an avoidance of the ratchet wheel 81. After the shelf 1 stops moving upward, the movable rod 82 is reset to the locking position under the action of the spring 83.

[0054] If the ratchet wheel 81 has a tendency to rotate clockwise (corresponding to the downward movement of the shelf 1) along the arrow direction, Figure 3 the ratchet wheel 81 cannot rotate under the locking of the movable rod 82, so that the gear 3 and the rack 2 cannot move relatively, avoiding the downward movement of the shelf 1 under the weight of the objects placed thereon.

[0055] When the movable rod 82 is in the release position, the rotation of the ratchet wheel 81 is not limited and can rotate in both directions, that is, the shelf 1 can move upward or downward.

[0056] Of course, the locking and releasing of the movable rod 82 to the ratchet wheel 81 are not limited to the foregoing manner. The movable rod 82 can also be arranged to move vertically close to and away from the ratchet wheel 81 to reach the locking position and the release position. The movable rod 82 can also be arranged to move horizontally to the locking position and to the release position. Or other arrangement modes that can realize the locking and releasing of the movable rod 82 to the ratchet wheel 81, which are not described in detail here.

[0057] Further, the outer contour of the ratchet wheel 81 is arc-shaped, and the end of the movable rod 82 close to the ratchet wheel 81 is provided with a circular sleeve made of elastic material. When the movable rod 82 moves forward and then returns to the locking position under the action of the restoring force of the spring 83, the arc-shaped ratchet wheel 81 has a small contact area with the movable rod 82. The circular sleeve close to the end of the movable rod 82 close to the ratchet wheel 81 further reduces the contact area between the ratchet wheel 81 and the movable rod 82, so that the contact area between the ratchet wheel 81 and the movable rod 82 changes from the original surface contact to point contact, greatly reducing the noise caused by the impact of the movable rod 82 and the ratchet wheel 81. The circular sleeve made of elastic material acts as a buffer, further reducing the noise caused by the impact.

[0058] In some embodiments, the connecting piece 12 comprises a supporting part 122 for supporting the shelf 11 and a side part 123 connected with the supporting part 122; the free end of the movable rod 82 is provided with a wrench 823, and when the movable rod 82 is in the locking position, the rear end of the wrench 823 abuts against the front end of the side part 123. By providing the wrench 823 at the free end of the movable rod 82, the user can move the movable rod 82 from the locking position to the releasing position by holding the wrench 823 at the front end, which is convenient for adjusting the shelf 1.

[0059] In some embodiments, the diameter of the gear 3 is greater than the diameter of the synchronizing wheel 72, so that when the gear 3 rotates one circle, the synchronizing wheel 72 rotates more than one circle, and the ratchet wheel 81 coaxially arranged with the synchronizing wheel 72 also rotates more than one circle. That is, when the shelf 1 is adjusted to the same height, the greater the diameter of the gear 3, the greater the angle of rotation of the ratchet wheel 81, and the more the number of teeth that can be locked by the ratchet wheel 81 within the adjustment height, and the greater the adjustment accuracy.

[0060] In other embodiments, the connecting piece 12 is provided with a mounting hole 1231, and the synchronizing wheel 72 is connected with the ratchet wheel 81 through the mounting hole 1231.

[0061] As Figure 8 In some embodiments, the synchronizing wheel 72 is provided with two buckles 722 arranged opposite to each other at the side close to the ratchet wheel 81, and the ratchet wheel 81 is provided with a clearance hole 811 at the side close to the synchronizing wheel 72, and the clearance hole 811 is provided with an abutting surface 8111 at the side away from the synchronizing wheel 72, and the buckle 722 abuts against the abutting surface 8111 after passing through the clearance hole 811, so that the synchronizing wheel 72 and the ratchet wheel 81 are connected. In order to prevent the buckle 722 from loosening and separating from the clearance hole 811, the ratchet wheel 81 is further provided with a positioning hole 812 communicating with the clearance hole 811, and a pin 813 is arranged in the positioning hole 812 between the two buckles 722 opposite to each other, so as to prevent the two buckles 722 from deviating from the abutting surface 8111 to the side close to each other, thereby causing the synchronizing wheel 72 and the ratchet wheel 81 to separate. The inner wall of the positioning hole 812 is provided with a protrusion 8121, and the pin 813 abuts against the protrusion 8121 at the side away from the synchronizing wheel 72, so as to prevent the pin 813 from slipping out of the positioning hole 812.

[0062] In some embodiments, the adjusting mechanism further comprises a slide rail 4 and a slide block 5, the slide rail 4 is provided with a left and right opening slide groove 41, the rack 2 is arranged at the front end of the slide rail 4 and the teeth of the rack 2 are forward, the slide block 5 is provided with a pulley 51 and a fixed column 52, when the shelf 1 moves up and down, the pulley 51 slides in the slide groove 41 to guide. The connecting piece 12 is provided with a downward opening hanging groove 121, the hanging groove 121 is hung on the fixed column 52 to realize the connection between the shelf 1 and the slide block 5, and the hanging groove 121 can also prevent the shelf 1 from tilting forward by hanging the fixed column 52. It should be noted that the number 51 in the figure refers to the position of the pulley 51 instead of the pulley 51 itself, and the pulley 51 is blocked by the adapter and cannot be shown.

[0063] Preferably, the connecting piece 12 is provided with two hanging grooves 121, the slide block 5 is provided with two pulleys 51 and two fixed columns 52, in the vertical direction, the two fixed columns 52 are arranged near the middle of the slide block 5, and the two pulleys 51 are arranged near the two ends of the slide block 5. In the horizontal direction, the width of the slide groove 41 and the width of the pulley 51 usually have errors, and since the slide groove 41 is opened in the left and right directions, that is, the width direction of the slide groove 41 is the front and back direction, when the shelf 1 naturally places objects or adjusts the height upward, the pulley 51 will move forward and backward in the slide groove 41 due to the width difference between the pulley 51 and the slide groove 41, thereby causing the shelf 1 to tilt forward or the front end to be raised. Since the fixed column 52 and the pulley 51 are both arranged on the slide block 5, the inclination angles of the two are the same, but the deflection amount of the pulley 51 away from the rotation point is greater than the deflection amount of the fixed column 52 close to the rotation point, therefore, when the two pulleys 51 are arranged outside the two fixed columns 52, the deflection amount of the fixed column 52 is smaller, that is, the deflection amount of the shelf 1 connected to the fixed column 52 is also smaller.

[0064] Of course, the positions of the hanging groove 121 and the fixed column 52 can also be interchanged, the hanging groove 121 is arranged on the slide block 5, and the fixed column 52 is arranged on the connecting piece 12, at this time the hanging groove 121 needs to be opened upward, and the positional relationship between the fixed column 52 and the pulley 51 becomes the positional relationship between the hanging groove 121 and the pulley 51, that is, in the vertical direction, the two hanging grooves 121 are arranged near the middle of the slide block 5, and the two pulleys 51 are arranged near the two ends of the slide block 5.

[0065] Further, the adjusting mechanism further comprises a limiting piece 6, the limiting piece 6 can be moved relative to the connecting piece 12 to block the opening of the hanging groove 121 to limit the fixed column 52 from slipping out of the hanging groove 121. For example, Figure 3 The limiting piece 6 is limited by a lock 61 to move only in the forward and backward directions, when moving forward, the limiting piece 6 is away from the opening of the hanging groove 121, so that the hanging groove 121 can be hung on the fixed column 52, when moving backward, the opening of the hanging groove 121 is blocked, which can avoid the disconnection between the hanging groove 121 and the fixed column 52 when the shelf 1 is lifted up.

[0066] In some embodiments, as described above, the sliding block 5 is provided with two pulleys 51, the sliding rail 4 is provided with a sliding groove 41, the two pulleys 51 are arranged in the sliding groove 41 in a vertical direction, and the distance between the pitch circle of the gear 3 and the pitch line of the rack 2 wherein a and b are respectively the distance between the axis of the gear 3 and the axis of the upper pulley 51 in the horizontal direction and the vertical direction when the shelf 1 is horizontal, d is the width difference between the sliding groove 41 and the pulley 51 in the horizontal direction, and H is the distance between the axes of the two pulleys 51 in the vertical direction.

[0067] As Figure 9 In an ideal state, the shelf 1 is arranged horizontally, the distance between the axis of the gear 3 and the axis of the upper pulley 51 in the horizontal direction and the vertical direction is a and b respectively, the angle between the line connecting the axis of the gear 3 and the axis of the upper pulley 51 and the horizontal line is α, and the angle between the line connecting the axis of the gear 3 and the axis of the lower pulley 51 and the horizontal line is β. However, due to the width difference d between the sliding groove 41 and the pulley 51, after the shelf 1 is lifted, the lower pulley 51 will move forward by a distance d, so that the lower pulley 51 rotates by an angle β relative to the upper pulley 51. At this time, the angle between the line connecting the axis of the gear 3 and the axis of the upper pulley 51 and the horizontal line is α-β, and the distance between the axis of the gear 3 and the axis of the upper pulley 51 in the horizontal direction is a-d. Therefore, a distance between the gear 3 and the rack 2 in the horizontal direction needs to be reserved after the gear 3 and the rack 2 are just engaged. In order to prevent the gear 3 and the rack 2 from being stuck and unable to operate after the shelf 1 is lifted or the front end of the shelf 1 is deflected before placing an object.

[0068] It should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0069] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present application, and are not intended to limit the protection scope of the present application, and any equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.

Claims

1. A shelving assembly comprising: The application relates to a shelf assembly, comprising: a shelf movable in a first direction; an adjusting mechanism arranged at a side of the shelf, the adjusting mechanism comprising a rack and a gear, the rack being arranged in the first direction, and the gear being rotatably connected with the shelf and engaged with the rack; a damping mechanism comprising a damping wheel and a damper providing damping force for the damping wheel, the damping wheel being detachably connected with the damper and engaged with the gear; wherein a pitch circle radius r1 and a number of teeth z1 of the damping wheel satisfy the following formula: wherein k and b are constants in a damping and rotating speed relationship formula of the damper, g is a gravitational acceleration, m is a preset load bearing capacity of the shelf, r2 is a pitch circle radius of the gear, z2 is a number of teeth of the gear, and v is a preset descending speed of the shelf.

2. The shelf assembly of claim 1, wherein, The shelf comprises a shelf plate and a connecting piece connected with a side of the shelf plate, and the connecting piece is provided with a through hole; the damping wheel is provided with a non-circular hole, the damper is provided with a non-circular cylinder matched with the non-circular hole, and the non-circular cylinder passes through the through hole and the non-circular hole in sequence to realize the connection between the damping wheel and the damper.

3. The shelf assembly of claim 2, wherein, The application further comprises a synchronization mechanism, the synchronization mechanism comprising a synchronization rod and synchronization wheels arranged at two ends of the synchronization rod, and the synchronization wheels are engaged with the gear.

4. The shelf assembly of claim 3, wherein, The application further comprises a limiting mechanism, the limiting mechanism comprising a ratchet wheel and a movable rod, the ratchet wheel is coaxially arranged with the synchronization wheel, and the movable rod comprises a locking position matched with the ratchet wheel to limit the rotation of the ratchet wheel when the shelf moves downward and a release position separated from the ratchet wheel.

5. The shelf assembly of claim 4, wherein, The diameter of the gear is larger than the diameter of the synchronization wheel.

6. The shelf assembly of claim 4, wherein, The connecting piece is provided with a mounting hole, and the synchronization wheel is connected with the ratchet wheel by passing through the mounting hole and away from the synchronization rod.

7. The shelf assembly of claim 4, wherein, The adjusting mechanism is arranged close to a rear end of the shelf, the movable rod is movable in a front-rear direction and is provided with a convex ring. The limiting mechanism is further provided with an elastic member and a limiting block connected with the connecting piece, the limiting block is provided with a limiting hole matched with a cross section of the movable rod, the movable rod passes through the limiting hole, and the elastic member is abutted against a rear end of the limiting block and a convex ring.

8. The shelf assembly of claim 7, wherein, An outer contour of the ratchet wheel is arc-shaped, and the movable rod is provided with a circular sleeve at an end close to the ratchet wheel, and the circular sleeve is made of elastic material.

9. The shelf assembly of claim 7, wherein, The connecting piece comprises a supporting part for supporting the shelf plate and a side part connected with the supporting part; the movable rod is provided with a wrench at an end away from the ratchet wheel, and a rear end of the wrench is abutted against a front end of the side part when the movable rod is in the locking position.

10. A refrigeration appliance comprising: The application further relates to a refrigerator comprising a box body provided with a refrigeration compartment and a shelf assembly arranged in the refrigeration compartment, and the shelf assembly is the shelf assembly according to any one of claims 1 to 9.

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