Bottom-mount slide rail assembly and refrigeration appliance

Abstract

The utility model provides a kind of bottom-mounted slide rail assembly and refrigeration equipment, it is related to refrigeration equipment technical field.The bottom-mounted slide rail assembly includes multiple slide rails, first ball assembly and second ball assembly, multiple slide rails are extended along front-back direction, and it is slidably arranged in front-back direction, and upper slide rail is used to connect drawer;Lower slide rail is used to be connected with the cavity wall of containing the drawer;First ball assembly is arranged between the upper slide rail and the middle slide rail, and second ball assembly is arranged between middle slide rail and lower slide rail.In horizontal direction, first ball of first ball assembly side at least partially overlapping arrangement with second ball of second ball assembly side, and the upper slide rail and the lower slide rail at least partially overlapping arrangement, on the basis of ensuring the strength of slide rail structure to meet the bearing demand, the overall height occupation of component in vertical direction is greatly compressed.

Description

Technical Field

[0001] This utility model belongs to the field of refrigeration equipment technology, and in particular relates to a bottom-mounted slide rail assembly and refrigeration equipment. Background Technology

[0002] In devices with drawers, drawers are commonly used for storage. During use, drawers need to be pulled out to retrieve and store items; the smoothness and stability of these movements are crucial to the overall user experience. Drawer slides are the core component enabling the drawer's pull-out function, and their structure directly affects the device's capacity. In current technology, to reduce space occupancy, side-mounted vertical slides are typically used. However, to increase the load-bearing capacity of vertical slides, their height often needs to be increased, but this increase in height significantly reduces the effective storage space. Utility Model Content

[0003] In view of this, the present invention provides a bottom-mounted slide rail assembly and a refrigeration device, which aims to solve the problem that the effective storage space is reduced when the load-bearing capacity of existing slide rails is increased.

[0004] The technical solution of this utility model is implemented as follows: This utility model embodiment provides a bottom-mounted slide rail assembly, which includes multiple slide rail sections, each extending along a front-to-back direction. Each slide rail section includes at least an upper slide rail, a middle slide rail, and a lower slide rail, which are sequentially connected and slidably arranged relative to each other in the front-to-back direction. The upper slide rail connects to the drawer; the lower slide rail connects to the cavity wall accommodating the drawer; a first ball bearing assembly is disposed between the upper and middle slide rails, comprising a plurality of first balls corresponding to the side of the middle slide rail; a second ball bearing assembly is disposed between the middle and lower slide rails, comprising a plurality of second balls corresponding to the side of the middle slide rail; wherein, in the horizontal direction, the first and second balls at least partially overlap, and the upper and lower slide rails at least partially overlap.

[0005] In one embodiment, the upper slide rail includes a first slide groove body, the first slide groove body forming a first slide groove with an opening facing downward; the upper end of the middle slide rail extends into the first slide groove and is slidably connected to the upper slide rail; and / or, the lower slide rail includes a second slide groove body, the second slide groove body forming a second slide groove with an opening facing upward; the lower end of the middle slide rail extends into the second slide groove and is slidably connected to the lower slide rail.

[0006] In one embodiment, in the left-right direction, the first slide body has two oppositely arranged first sidewalls, and the second slide body has oppositely arranged second sidewalls; the two first sidewalls extend into the second slide, and the first sidewalls and the second sidewalls are at least partially overlapping in the horizontal direction.

[0007] In one embodiment, the first slide body further has a first bottom wall connected between the two first side walls, and the second slide body further has a second bottom wall connected between the two second side walls; the middle slide rail includes: a support body, the upper end of which extends into the first slide body to abut against the first bottom wall; the lower end of which extends into the second slide body to abut against the second bottom wall; and two main extension arms, correspondingly connected to opposite sides in the left-right direction of the lower end of the support body to abut against the second bottom wall.

[0008] In one embodiment, the cross-sectional area of ​​the supporting body is greater than the sum of the cross-sectional areas of the two extension arms in the direction perpendicular to the front and rear directions.

[0009] In one embodiment, the middle slide rail further includes two first sub-extension arms, which are correspondingly connected to opposite sides in the left-right direction at the upper end of the bearing body; the first slide rail body further includes a first hook portion, which is disposed at the lower end of the first sidewall and extends inward; wherein, the first sub-extension arms and the first hook portion are correspondingly disposed in the vertical direction to limit the displacement of the middle slide rail relative to the upper slide rail in the vertical direction.

[0010] In one embodiment, the first ball assembly includes: a first ball disposed in the gap between the first sub-extension arm and the first engagement portion; and a third ball disposed in the gap between the support body and the first bottom wall.

[0011] In one embodiment, the middle slide rail further includes two second sub-extension arms, which are correspondingly connected to the outer sides of the two main extension arms and extend upward; the second slide rail body further includes a second hooking part, which is disposed at the upper end of the second sidewall and extends inward; wherein, the two second sub-extension arms and the second hooking part are correspondingly arranged in the vertical direction to limit the displacement of the middle slide rail relative to the lower slide rail in the vertical direction.

[0012] In one embodiment, the second ball assembly includes: a second ball disposed in the gap between the second sub-extension arm and the second engagement portion; and a fourth ball disposed in the gap between the main extension arm and the second bottom wall.

[0013] This utility model also provides a refrigeration device, which includes a device body and a bottom-mounted slide rail assembly. The device has an internal cavity. A drawer is pull-out disposed within the cavity. The upper slide rail of the bottom-mounted slide rail assembly is installed below the drawer, and the lower slide rail of the bottom-mounted slide rail assembly is connected to the inner wall of the cavity. The bottom-mounted slide rail assembly includes multiple slide rail sections, all extending in the front-back direction. Each slide rail section includes at least an upper slide rail, a middle slide rail, and a lower slide rail, which are sequentially connected and can be pulled out in the front-back direction. The upper slide rail is slidably arranged to connect the drawer; the lower slide rail is connected to the cavity wall accommodating the drawer; a first ball bearing assembly is disposed between the upper slide rail and the middle slide rail, the first ball bearing assembly including a plurality of first balls disposed corresponding to the side of the middle slide rail; a second ball bearing assembly is disposed between the middle slide rail and the lower slide rail, the second ball bearing assembly including a plurality of second balls disposed corresponding to the side of the middle slide rail; wherein, in the horizontal direction, the first balls and the second balls at least partially overlap, and the upper slide rail and the lower slide rail at least partially overlap.

[0014] This embodiment of the invention frees up space on both sides of the drawer by installing a bottom-mounted slide rail assembly under the drawer, thereby increasing effective storage space. Simultaneously, the upper and lower slide rails are arranged with at least partial horizontal overlap, significantly reducing the overall vertical height occupied by the assembly while ensuring the structural strength of the slide rails meets load-bearing requirements. Furthermore, the first ball bearing on the side of the first ball bearing assembly and the second ball bearing on the side of the second ball bearing assembly are at least partially overlapped, further optimizing the vertical layout of the bottom-mounted slide rail assembly and avoiding additional height increase due to the ball bearing assembly arrangement. Moreover, the bottom-mounted slide rail assembly significantly enhances its stability and load-bearing capacity thanks to its bottom-mounted layout and vertical force transmission path design. Specifically, the bottom-mounted slide rail assembly is installed between the bottom of the drawer and the cavity wall accommodating the drawer, allowing the drawer's weight to be transmitted vertically sequentially to the upper and middle slide rails, and finally to the cavity wall accommodating the drawer via the lower slide rail. This force distribution pattern, which conforms to the principles of mechanics, effectively avoids the swaying and deformation problems caused by uneven lateral force in traditional side-mounted slide rails, resulting in a more uniform force distribution across each section of the slide rail. In summary, the structure of multiple slide rails connected sequentially and capable of relative sliding, combined with the ingenious design of overlapping areas, significantly improves load-bearing capacity without increasing vertical height, while also extending the service life of the slide rails. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 Assembly diagram of the bottom-mounted slide rail assembly, drawer, and equipment receiving cavity provided by this utility model; Figure 2 A first-person view of the overall structure of the bottom-mounted slide rail assembly provided by this utility model. Figure 3 Overall structural diagram of the bottom-mounted slide rail assembly provided by this utility model (second perspective); Figure 4 This is an overall sectional view of the bottom-mounted slide rail assembly provided by this utility model; Figure 5 The structural diagram of the slide rail in the bottom-mounted slide rail assembly provided by this utility model.

[0017] Explanation of reference numerals in the attached figures: 100. Bottom-mounted slide rail assembly; 1. Multi-section slide rail; 11. Upper slide rail; 110. First slide groove; 111. First slide groove body; 1111. First side wall; 1112. First bottom wall; 1113. First engaging part; 12. Middle slide rail; 121. Support body; 122. Main extension arm; 123. First sub-extension arm; 124. Second sub-extension arm; 13. Lower slide rail; 130. Second slide groove; 131. Second slide groove body; 1311. Second side wall; 1312. Second bottom wall; 1313. Second engaging part; 2. First ball assembly; 21. First ball; 22. Third ball; 3. Second ball assembly; 31. Second ball; 32. Fourth ball; 200. Drawer; 300. Equipment receiving cavity. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0019] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0020] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0021] In appliances with drawers, drawers are commonly used for storage. During use, drawers need to be pulled out to retrieve and store items; the smoothness and stability of these movements are crucial to the overall user experience. Drawer slides are the core component enabling the drawer's pull-out function, and their structure directly affects the appliance's capacity. In current technology, to reduce space occupancy, side-mounted vertical slides are typically used. However, to increase the load-bearing capacity of vertical slides, their height often needs to be increased, but this increase in height significantly reduces the effective storage space.

[0022] In view of this, this utility model provides a bottom-mounted slide rail assembly, which aims to solve the problem that existing slide rails reduce effective storage space when increasing load-bearing capacity.

[0023] Please see Figure 1 and Figure 2The bottom-mounted slide rail assembly 100 is used below the drawer 200, specifically installed between the bottom of the drawer 200 and the cavity wall that houses the drawer 200 (e.g., the inner liner of a refrigerator). The bottom-mounted slide rail assembly 100 includes multiple slide rails 1, designed to make the drawer 200 smoother and more stable during operation. Each slide rail 1 includes at least an upper slide rail 11, a middle slide rail 12, and a lower slide rail 13, which are connected sequentially and can slide relative to each other in the front-to-back direction. The upper slide rail 11 is connected to the drawer 200; when the drawer 200 is pulled out or pushed in, the upper slide rail 11 drives the drawer 200 to move synchronously. The middle slide rail 12 serves as a transition and assist in sliding; it can move flexibly between the upper slide rail 11 and the lower slide rail 13, ensuring the continuity of the entire sliding process. The lower slide rail 13 connects to the cavity wall that houses the drawer 200, providing a stable support base for the entire bottom-mounted slide rail assembly 100.

[0024] The upper slide rail 11 and the lower slide rail 13 are at least partially overlapped in the horizontal direction (the horizontal direction refers to the direction perpendicular to the vertical direction). "Overlapping" can be understood as at least a portion of the structure of the upper slide rail 11 and at least a portion of the structure of the lower slide rail 13 having overlapping areas on their horizontal projection surfaces. There are several specific ways to achieve this overlap. First, a horizontally staggered overlapping structure: the bottom area of ​​the upper slide rail 11 and the top area of ​​the lower slide rail 13 partially overlap in the horizontal direction. Second, a nested overlapping structure: the upper slide rail 11 has a U-shaped groove structure, and the upper area of ​​the lower slide rail 13 is embedded within the U-shaped groove of the upper slide rail 11, forming a partial horizontal overlap. Third, a stepped overlapping structure: both the upper slide rail 11 and the lower slide rail 13 adopt a stepped horizontal extension structure, divided into sections of different heights along the front-to-back direction, with corresponding sections forming a horizontal overlap. These configurations all utilize the partial overlap design of the upper slide rail 11 and the lower slide rail 13 to compress the overall height of the bottom-mounted slide rail assembly 100 in the vertical direction without reducing the structural strength of the slide rail (i.e., ensuring load-bearing capacity).

[0025] The upper slide rail 11 and the lower slide rail 13 are at least partially overlapped in the horizontal direction. This design reduces the space occupied by the bottom-mounted slide rail assembly 100 in the vertical direction. Furthermore, since the bottom-mounted slide rail assembly 100 is installed below the drawer 200, space on both sides of the drawer 200 is freed up, thereby increasing effective storage space. Simultaneously, because the bottom-mounted slide rail assembly 100 is installed below the drawer 200, the weight of the drawer 200 is primarily transferred to the bottom-mounted slide rail assembly 100 in a downward direction. This downward force transmission design makes the stress on the bottom-mounted slide rail assembly 100 more reasonable, effectively avoiding the uneven lateral force that may occur during the load-bearing process of traditional side-mounted slide rails, thus significantly improving the stability and load-bearing capacity of the bottom-mounted slide rail assembly 100. Compared with side-mounted vertical rails, this design avoids the problem of increasing height to improve load-bearing capacity, thereby reducing effective storage space.

[0026] Please see Figure 3 The bottom-mounted slide rail assembly 100 also includes a first ball bearing assembly 2 and a second ball bearing assembly 3, which replaces traditional sliding friction with rolling friction between the balls and the slide rail contact surface, further improving the smoothness of the bottom-mounted slide rail assembly during the pulling process and reducing noise. Specifically, the first ball bearing assembly 2 is arranged between the upper slide rail 11 and the middle slide rail 12, and the first ball bearing assembly 2 includes a plurality of first balls 21 disposed on the side of the middle slide rail 12; the second ball bearing assembly 3 is arranged between the middle slide rail 12 and the lower slide rail 13, and the second ball bearing assembly 3 includes a plurality of second balls 31 disposed on the side of the middle slide rail 12.

[0027] Accordingly, in the horizontal direction, the first ball bearing 21 and the second ball bearing 31 are at least partially overlapped. This design allows the projections of the first ball bearing assembly 2 and the second ball bearing assembly 3 in the vertical direction to overlap, further optimizing the layout of the bottom-mounted slide rail assembly 100 in the vertical space and avoiding additional increase in overall height due to the arrangement of the ball bearing assemblies.

[0028] This embodiment of the invention, by installing the bottom-mounted slide rail assembly 100 under the drawer 200, frees up space on both sides of the drawer 200, thereby increasing effective storage space. Simultaneously, the upper slide rail 11 and the lower slide rail 13 are arranged with at least partial horizontal overlap, significantly reducing the overall height occupied by the assembly in the vertical direction while ensuring the structural strength of the slide rail meets load-bearing requirements. Furthermore, the first ball 21 on the side of the first ball assembly 2 and the second ball 31 on the side of the second ball assembly 3 are at least partially overlapped, further optimizing the vertical layout of the bottom-mounted slide rail assembly 100 and avoiding additional increase in overall height due to the arrangement of the ball assembly. Moreover, the bottom-mounted slide rail assembly 100, relying on its bottom-mounted layout and vertical force transmission path design, significantly enhances its stability and load-bearing capacity. Specifically, the bottom-mounted slide rail assembly 100 is installed between the bottom of the drawer 200 and the cavity wall accommodating the drawer 200, allowing the weight of the drawer 200 to be transmitted vertically to the upper slide rail 11, the middle slide rail 12, and finally to the cavity wall accommodating the drawer 200 via the lower slide rail 13. This force distribution mode, conforming to mechanical principles, effectively avoids the shaking and deformation problems caused by uneven lateral force distribution in traditional side-mounted slide rails, resulting in a more uniform force distribution across each slide rail section. In summary, the structure of multiple slide rail sections 1 connected sequentially and capable of relative sliding, combined with the ingenious design of overlapping areas, significantly improves load-bearing capacity without increasing vertical height, while also extending the service life of the slide rails.

[0029] In some embodiments, please refer to Figure 2 , Figure 3 Figure 4 To achieve a sliding connection while simplifying the structure, a nested overlapping structure as described in the above embodiments is adopted. Specifically, the upper slide rail 11 includes a first slide groove body 111, which forms a first slide groove 110 with its opening facing downward; the upper end of the middle slide rail 12 extends into the first slide groove 110 and is slidably connected to the upper slide rail 11.

[0030] The first slide rail 111 of the upper slide rail 11 adopts an integrally formed U-shaped or groove-shaped structure. Its cross-section is an "U" shape with an opening facing downwards. It consists of a horizontally set top wall and side arms vertically connected to both sides of the top wall. The two side arms extend in parallel and form an opening at their lower ends, together enclosing a first slide rail 110 with a certain depth and width. The inner side wall of the slide rail (i.e., the opposite surfaces of the two side arms) can be provided with a smooth guide surface, or a groove / boob structure reserved for installing rolling components (such as balls, rollers).

[0031] The upper end portion of the middle slide rail 12 is designed as a "T"-shaped or "I"-shaped structure adapted to the first sliding groove 110, with its transverse dimension being slightly smaller than the width of the first sliding groove 110, and its longitudinal height matching the depth of the first sliding groove 110. When the upper end of the middle slide rail 12 extends into the first sliding groove 110, the edges on both sides thereof form a clearance fit with the inner side walls of the first sliding groove 110, or rolling contact is achieved through a ball retainer embedded therebetween. For example, shallow grooves for accommodating balls are provided on both sides of the upper end of the middle slide rail 12, and adaptive track grooves are also provided at corresponding positions on the inner side walls of the first sliding groove 110, so that sliding friction can be reduced when the balls roll in the grooves. All the track grooves extend in the front-rear direction.

[0032] Similarly, in order to achieve a simple structure on the basis of realizing the sliding connection, a nested overlapping structure is also adopted. Specifically, the lower slide rail 13 includes a second sliding groove body 131, and the second sliding groove body 131 is formed with a second sliding groove 130 with an opening facing upward; the lower end of the middle slide rail 12 extends into the second sliding groove 130 and is slidably connected to the lower slide rail 13.

[0033] Wherein, the second sliding groove body 131 of the lower slide rail 13 also adopts an integrally formed U-shaped or channel-shaped structure, which has a "["-shaped cross section with an opening facing upward, and is composed of a horizontally arranged bottom wall and side arms vertically connected to both sides of the bottom wall. The side arms on both sides extend in parallel and form an opening at the upper ends, jointly enclosing the second sliding groove 130 with a certain depth and width. The inner side walls of the second sliding groove 130 may also be provided with smooth guide surfaces, or reserved with groove / boss structures for installing rolling assemblies.

[0034] The lower end portion of the middle slide rail 12 is designed as a structure adapted to the second sliding groove 130, with its transverse dimension being slightly smaller than the width of the second sliding groove 130, and its longitudinal height matching the depth of the second sliding groove 130. When the lower end of the middle slide rail 12 extends into the second sliding groove 130, the edges on both sides thereof form a clearance fit with the inner side walls of the second sliding groove 130, or rolling contact is achieved through a ball retainer embedded therebetween. For example, shallow grooves for accommodating balls are provided on both sides of the lower end of the middle slide rail 12, and adaptive track grooves are also provided at corresponding positions on the inner side walls of the second sliding groove 130. The balls roll in the grooves, which can effectively reduce the sliding friction force between the middle slide rail 12 and the lower slide rail 13, making the pulling and pushing of the drawer 200 easier and smoother.

[0035] In terms of material selection, the upper slide rail 11, the middle slide rail 12 and the lower slide rail 13 can be made of high-strength, corrosion-resistant metal materials, such as aluminum alloy. Aluminum alloy has the advantages of light weight, high strength and corrosion resistance, which can reduce the self-weight of the bottom-mounted slide rail assembly 100 and lower the burden on the overall structure while ensuring the performance thereof. Moreover, the surface of the aluminum alloy material can be subjected to treatments such as anodization, to further improve its wear resistance and corrosion resistance, and prolong the service life of the bottom-mounted slide rail assembly 100.

[0036] In some embodiments, please continue reading Figure 2 , Figure 3 Figure 4 The nested overlapping structure in the above embodiment is optimized by adopting a nested overlapping structure that is more conducive to structural stability. Specifically, in the left-right direction, the first slide body 111 has two oppositely arranged first sidewalls 1111, and the second slide body 131 has oppositely arranged second sidewalls 1311; the two first sidewalls 1111 extend into the second slide 130, and the first sidewalls 1111 and the second sidewalls 1311 are at least partially overlapping in the horizontal direction.

[0037] In this design, after the first sidewall 1111 extends into the second slide rail 130, the second sidewall 1311 forms a wrapping restraint on the first sidewall 1111 from the outside. The partial overlap in the horizontal direction further restricts the relative displacement of the two in the vertical direction, forming a dual fixing effect of "horizontal constraint and vertical restraint". This design effectively reduces the left-right swaying and up-down movement that may occur during the sliding process. Even if the drawer 200 is carrying heavy items, it can maintain a stable sliding trajectory, significantly improving the component's resistance to deformation and structural rigidity.

[0038] In some embodiments, please refer to Figure 4 and Figure 5 To transmit force more effectively, the middle slide rail 12 was optimized based on the structure of the first slide rail 111 and the second slide rail 131. Specifically, the first slide rail 111 also has a first bottom wall 1112 connected between the two first side walls 1111, and the second slide rail 131 also has a second bottom wall 1312 connected between the two second side walls 1311. The middle slide rail 12 includes a supporting body 121 and two main extension arms 122. The upper end of the supporting body 121 extends into the first slide rail 111 to abut (usually indirectly, for example, through a ball or slider) against the first bottom wall 1112. The lower end of the supporting body 121 extends into the second slide rail 131 to abut (usually indirectly, for example, through a ball or slider) against the second bottom wall 1312. The two main extension arms 122 are correspondingly connected to the left and right sides of the lower end of the supporting body 121 to abut against the second bottom wall 1312.

[0039] The force transmission path is as follows: the weight borne by drawer 200 is converted into downward vertical pressure, which first acts on the upper slide rail 11 fixedly connected to drawer 200, and then is transmitted through the first bottom wall 1112 of the upper slide rail 11 to the upper end of the supporting body 121 of the middle slide rail 12. The supporting body 121 transmits this pressure vertically downward to its lower end, on the one hand directly to the second bottom wall 1312 of the lower slide rail 13, and on the other hand simultaneously distributed to the second bottom wall 1312 through the main extension arms 122 on the left and right sides. Finally, all the pressure gathered on the second bottom wall 1312 is completely transmitted by the lower slide rail 13 to the cavity wall accommodating the drawer 200, completing the entire force transmission process.

[0040] The dual-path design of the main transmission of the load-bearing body 121 and the diversion transmission of the main extension arm 122 disperses the pressure concentrated on the load-bearing body 121 to multiple areas of the second bottom wall 1312, expanding the area of ​​force application. This design reduces the local stress concentration of the second bottom wall 1312, avoids structural deformation caused by excessive local stress, and improves the load-bearing limit of the bottom-mounted slide rail assembly 100. At the same time, the symmetrical connection structure between the main extension arm 122 and the load-bearing body 121, while diverting pressure, forms lateral support for the load-bearing body 121, suppressing possible lateral displacement of the load-bearing body 121 during force transmission.

[0041] In some embodiments, please refer to Figure 4 and Figure 5 To enhance the bending strength of the bottom-mounted slide rail assembly 100, the middle slide rail 12 was optimized. Specifically, in the direction perpendicular to the front and rear, the cross-sectional area of ​​the supporting body 121 is greater than the sum of the cross-sectional areas of the two extension arms.

[0042] In other words, the cross-sectional area of ​​the middle slide rail 12 is concentrated in the center. It can be understood that the bending strength of a component is directly related to its moment of inertia, and the magnitude of the moment of inertia is closely related to the distribution of the component's cross-sectional area. The more concentrated the area is in the core stress region, the larger the moment of inertia, and the stronger the component's resistance to bending deformation. During operation, the bearing body 121 of the middle slide rail 12, as the core component for force transmission, must bear the concentrated pressure from the upper slide rail 11 and transmit it downwards, while also bearing the dynamic bending moment generated when the drawer 200 is pulled out; it is the main location where bending deformation occurs. By increasing the cross-sectional area of ​​the bearing body 121, its vertical moment of inertia is significantly increased, effectively dispersing bending stress and suppressing bending deformation.

[0043] The core function of the main extension arm 122 is to assist in dispersing pressure and achieving lateral restraint. Its stress mainly manifests as distributed load in the vertical direction and constraint force in the horizontal direction. The bending moment it bears is relatively small, so a smaller cross-sectional area is used.

[0044] In some embodiments, please refer to Figure 4 and Figure 5 To enhance the tightness of the fit between the middle slide rail 12 and the upper slide rail 11 and reduce wobbling, a first sub-extension arm 123 is added to the middle slide rail 12. Specifically, the middle slide rail 12 also includes two first sub-extension arms 123, which are connected to opposite sides in the left-right direction at the upper end of the support body 121. Correspondingly, the first slide groove body 111 also includes a first hook part 1113, which is disposed at the lower end of the first side wall 1111 and extends inward. The first sub-extension arm 123 and the first hook part 1113 are correspondingly arranged in the vertical direction to limit the displacement of the middle slide rail 12 relative to the upper slide rail 11 in the vertical direction.

[0045] Since the first sub-extension arm 123 extends from the upper end of the supporting body 121 to the left and right sides, its lower end face corresponds vertically to the upper end face of the first hook part 1113. When the middle slide rail 12 tends to move downward relative to the upper slide rail 11, the first sub-extension arm 123 will abut against the first hook part 1113 to prevent displacement. At the same time, combined with the abutment relationship between the upper end of the supporting body 121 of the middle slide rail 12 and the first bottom wall 1112 (or through indirect support of the rolling component), a bidirectional limit is formed on the middle slide rail 12 in the vertical direction. This structure makes up for the shortcomings of simply relying on sliding clearance, greatly reduces the vertical movement of the middle slide rail 12 caused by force fluctuations during the pulling process, and keeps the relative movement of the two within the preset trajectory, thus improving the tightness of the fit.

[0046] In some embodiments, please refer to Figure 3 and Figure 4 The first ball assembly 2 includes a third ball 22 and the aforementioned first ball 21. Specifically, the first ball 21 is disposed in the gap between the first sub-extension arm 123 and the first engaging portion 1113; the third ball 22 is disposed in the gap between the supporting body 121 and the first bottom wall 1112. Specifically, the first ball 21 and the third ball 22 can be supported by cages to ensure that the balls are arranged in an orderly manner within the gap, avoiding mutual collision or displacement.

[0047] Furthermore, to accommodate the movement of the first ball bearing 21 and the third ball bearing 22, the inner wall surfaces of the first bottom wall 1112, the first side wall 1111, and the first engaging portion 1113 are all provided with track grooves; and the corresponding surfaces of the supporting body 121 and the first sub-extension arm 123 are also provided with matching track grooves. The track grooves provide good guidance for the balls, ensuring the stability and consistency of the ball rolling, and further improving the smooth operation of the entire bottom-mounted slide rail assembly 100.

[0048] In some embodiments, please refer to Figure 4 and Figure 5 To enhance the tightness of the fit between the middle slide rail 12 and the lower slide rail 13 and reduce wobbling, a second sub-extension arm 124 is added to the middle slide rail 12. Specifically, the middle slide rail 12 also includes two second sub-extension arms 124, which are connected to the outer sides of the two main extension arms 122 and extend upwards respectively; correspondingly, the second slide groove body 131 also includes a second hooking part 1313, which is disposed at the upper end of the second side wall 1311 and extends inwards; wherein, the second sub-extension arm 124 and the second hooking part 1313 are correspondingly arranged in the vertical direction to limit the displacement of the middle slide rail 12 relative to the lower slide rail 13 in the vertical direction.

[0049] Since the two second sub-extension arms 124 extend upward from the left and right sides of the two main extension arms 122 respectively, their upper end faces correspond vertically with the lower end faces of the second hook portion 1313. When the middle slide rail 12 tends to move upward relative to the lower slide rail 13, the second sub-extension arms 124 will abut against the second hook portion 1313 to prevent displacement. At the same time, combined with the abutment relationship between the lower end of the middle slide rail 12 bearing body 121 and the second bottom wall 1312 (or through indirect support of the ball bearing assembly), a bidirectional limit is formed on the middle slide rail 12 in the vertical direction. This structure makes up for the shortcomings of simply relying on sliding clearance, greatly reduces the vertical movement of the middle slide rail 12 caused by force fluctuations during the pulling process, and keeps the relative movement between the middle slide rail 12 and the lower slide rail 13 within the preset trajectory, further improving the tightness of the fit.

[0050] In some embodiments, please refer to Figure 3 and Figure 4 and Figure 5 The second ball assembly 3 includes a fourth ball 32 and the aforementioned second ball 31. Specifically, the second ball 31 is disposed in the gap between the second sub-extension arm 124 and the second engagement portion 1313; the fourth ball 32 is disposed in the gap between the main extension arm 122 and the second bottom wall 1312. Specifically, the second ball 31 and the fourth ball 32 can be supported by cages to ensure that the balls are arranged in an orderly manner within the gaps, avoiding mutual collision or displacement.

[0051] Furthermore, to accommodate the movement of the second ball 31 and the fourth ball 32, the inner wall surfaces of the second bottom wall 1312, the second side wall 1311, and the second engaging portion 1313 are all provided with track grooves; and the corresponding surfaces of the supporting body 121 and the second sub-extension arm 124 are also provided with matching track grooves. The track grooves provide good guidance for the balls, ensuring the stability and consistency of the ball rolling, and further improving the smooth operation of the entire bottom-mounted slide rail assembly 100.

[0052] In some embodiments, please refer to Figure 3 and Figure 4 and Figure 5 To prevent the first ball bearing assembly 2 from dislodging from the gap between the upper slide rail 11 and the middle slide rail 12 in the front-rear direction, limiting structures can be provided at both ends of the first slide rail 111 and the support body 121. For example, if flanges are provided at the front and rear ends of the first slide rail 111, when the first ball bearing assembly 2 slides to the front and rear ends with the middle slide rail 12, the flanges will interact with the cage to prevent the first ball bearing assembly 2 from continuing to move forward or backward, thereby preventing it from dislodging from the gap.

[0053] Meanwhile, for the second ball assembly 3, to prevent it from dislodging from the gap between the lower slide rail 13 and the middle slide rail 12 in the front-back direction, a similar method can be adopted. Corresponding limiting structures are provided at the front and rear ends of the second slide rail 131 and the supporting body 121. For example, flanges are provided at the front and rear ends of the second slide rail 131. When the second ball assembly 3 slides to the front and rear ends with the middle slide rail 12, the flanges interact with the cage, preventing the second ball assembly 3 from continuing to move forward or backward, ensuring that it always remains within the gap between the lower slide rail 13 and the middle slide rail 12, thus maintaining the normal operation of the bottom-mounted slide rail assembly 100.

[0054] This utility model embodiment also provides a refrigeration device, which can be an electrical appliance with a drawer-type storage structure, such as a refrigerator, freezer, wine cabinet, or ice maker. Specifically, when the refrigeration device is a refrigerator, it can be a single-door refrigerator, a double-door refrigerator, or a sliding-door refrigerator; this utility model embodiment does not limit the specific type of refrigeration device.

[0055] Please see Figures 1 to 5 The refrigeration equipment includes a main body, a drawer 200, and a bottom-mounted slide rail assembly 100 provided in any of the above embodiments; the main body has an internal cavity; the drawer 200 is detachably disposed in the cavity; the upper slide rail 11 of the bottom-mounted slide rail assembly 100 is installed below the drawer 200, and the lower slide rail 13 of the bottom-mounted slide rail assembly 100 is connected to the inner wall of the cavity.

[0056] Applying the aforementioned bottom-mounted slide rail assembly 100 to the device drawer 200 provides users with a superior user experience. When the user pulls out the drawer 200, the bottom-mounted slide rail assembly 100, with its innovative structure featuring at least partial overlap at the top and bottom, significantly reduces its vertical space occupation, avoiding excessive encroachment on the internal storage space of the refrigeration equipment. This allows for more efficient use of the internal space, thus providing users with greater storage capacity. Simultaneously, the layout design of the bottom-mounted slide rail assembly 100, installed beneath the drawer 200, combined with its robust structural construction and optimized force transmission path, can reliably support heavier items within the drawer 200, ensuring stable operation even when multiple heavy items are stored.

[0057] In some embodiments, two sets of bottom-mounted slide rail assemblies 100 are provided, and the two sets of bottom-mounted slide rail assemblies 100 are arranged at intervals along the left and right directions of the drawer 200 to jointly support and guide the drawer 200 to slide out in the front and back directions.

[0058] This double-bottom-mounted drawer slide assembly 100 configuration enhances the stability and balance of the drawer 200 during operation. The two sets of bottom-mounted slide slide assemblies 100 work together to evenly distribute the weight of the drawer 200, preventing tilting or jamming due to excessive force on one side. Furthermore, the spaced arrangement of the two sets of bottom-mounted slide slide assemblies 100 increases the number of connection points between the drawer 200 and the inner wall of the receiving cavity, improving the overall structural robustness. When the drawer 200 is subjected to significant external force or vibration, the two sets of bottom-mounted slide slide assemblies 100 work together to resist the force, preventing the drawer 200 from falling out of the receiving cavity or being damaged.

[0059] In some embodiments, the receiving cavity is a freezing cavity.

[0060] When applying the bottom-mounted slide rail assembly 100 to the drawer 200 of the freezer cavity, the special characteristics of the freezing environment must also be considered. The aluminum alloy material used in the bottom-mounted slide rail assembly 100 has good low-temperature performance and can maintain stable physical and chemical properties in the freezing environment. It will not become brittle or lose its toughness due to low temperatures, so that the bottom-mounted slide rail assembly 100 can still work normally in the freezer cavity.

[0061] The above are merely exemplary embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the technical concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A bottom-mounted drawer slide assembly for installation under a drawer, characterized in that, The bottom-mounted slide rail assembly includes: The slide rails are multi-sectioned, all extending in the front-to-back direction. Each slide rail includes at least an upper slide rail, a middle slide rail, and a lower slide rail. The upper slide rail, the middle slide rail, and the lower slide rail are connected in sequence and can slide relative to each other in the front-to-back direction. The upper slide rail is used to connect to the drawer, and the lower slide rail is used to connect to the cavity wall that accommodates the drawer. A first ball bearing assembly is disposed between the upper slide rail and the middle slide rail. The first ball bearing assembly includes a plurality of first balls disposed on the side of the middle slide rail. The second ball assembly is disposed between the middle slide rail and the lower slide rail, and the second ball assembly includes a plurality of second balls disposed on the side of the middle slide rail; In the horizontal direction, the first ball and the second ball are at least partially overlapped, and the upper slide rail and the lower slide rail are at least partially overlapped.

2. The bottom-mounted slide rail assembly according to claim 1, characterized in that, The upper slide rail includes a first slide groove body, the first slide groove body forming a downward-facing first slide groove; the upper end of the middle slide rail extends into the first slide groove and is slidably connected to the upper slide rail; and / or, The lower slide rail includes a second slide groove body, which forms an upward-facing second slide groove; the lower end of the middle slide rail extends into the second slide groove and is slidably connected to the lower slide rail.

3. The bottom-mounted slide rail assembly according to claim 2, characterized in that, In the left-right direction, the first slide body has two first side walls that are arranged opposite to each other, and the second slide body has two second side walls that are arranged opposite to each other; The two first sidewalls extend into the second groove, and the first sidewalls and the second sidewalls are arranged to overlap at least partially in the horizontal direction.

4. The bottom-mounted slide rail assembly according to claim 3, characterized in that, The first slide rail also has a first bottom wall connected between the two first side walls, and the second slide rail also has a second bottom wall connected between the two second side walls; the middle slide rail includes: A support body, the upper end of which extends into the first sliding groove to abut against the first bottom wall; the lower end of which extends into the second sliding groove to abut against the second bottom wall; and, Two main extension arms are connected to the opposite sides in the left and right directions at the lower end of the supporting body to abut against the second bottom wall.

5. The bottom-mounted slide rail assembly according to claim 4, characterized in that, In the direction perpendicular to the front and rear, the cross-sectional area of ​​the supporting body is greater than the sum of the cross-sectional areas of the two extension arms.

6. The bottom-mounted slide rail assembly according to claim 4, characterized in that, The middle slide rail also includes two first sub-extension arms, which are connected to the opposite sides in the left and right directions of the upper end of the bearing body. The first chute body also includes a first hook portion, which is disposed at the lower end of the first sidewall and extends inward. The first sub-extension arm and the first hook portion are respectively arranged in the vertical direction to limit the displacement of the middle slide rail relative to the upper slide rail in the vertical direction.

7. The bottom-mounted slide rail assembly according to claim 6, characterized in that, The first ball assembly includes: The first ball bearing is disposed in the gap between the first sub-extension arm and the first engaging portion; and... The third ball bearing is disposed in the gap between the bearing body and the first bottom wall.

8. The bottom-mounted slide rail assembly according to claim 4, characterized in that, The middle slide rail also includes two second sub-extension arms, which are connected to the outside of the two main extension arms and extend upward respectively. The second chute body further includes a second hooking part, which is disposed at the upper end of the second sidewall and extends inward; The two second sub-extension arms are arranged correspondingly to the second hook in the vertical direction to limit the displacement of the middle slide rail relative to the lower slide rail in the vertical direction.

9. The bottom-mounted slide rail assembly according to claim 8, characterized in that, The second ball assembly includes: The second ball bearing is disposed in the gap between the second sub-extension arm and the second engagement portion; and, The fourth ball, the gap between the main extension arm and the second bottom wall.

10. A refrigeration device, characterized in that, include: The main body of the equipment has an internal cavity. A drawer is provided within the receiving cavity; The bottom-mounted slide rail assembly as described in any one of claims 1 to 8, wherein the upper slide rail of the bottom-mounted slide rail assembly is mounted below the drawer, and the lower slide rail of the bottom-mounted slide rail assembly is connected to the inner wall of the receiving cavity.

Images