Balanced stepless up and down adjustment structure

Abstract

This application relates to the technical field of cabinet door accessories, and in particular to a balanced stepless vertical adjustment structure, including a baffle that forms an installation space with the cabinet side panel; the cabinet side panel has an upper rail, a middle rail, and a lower rail arranged from top to bottom; an upper pulley mechanism slides within the upper rail, a middle pulley mechanism slides within the middle rail, and a lower pulley mechanism slides within the lower rail; the middle pulley mechanism has floating space within the middle rail, and the lower pulley mechanism has floating space within the lower rail; a vertical component is hinged to the cabinet door; a stepless adjustment device includes an adjustment seat and a connecting screw; the upper pulley mechanism includes an upper pulley seat and an upper pulley, and a sliding joint is provided between the upper pulley seat and the vertical component, allowing them to slide vertically; the adjustment seat is fixed to one side of the vertical component, and the connecting screw is threadedly connected to both the adjustment seat and the upper pulley seat; the middle pulley mechanism and the lower pulley mechanism are slidably connected to the vertical component. This application can be adapted to sliding cabinet doors and achieve stepless vertical adjustment.

Description

Technical Field

[0001] This application relates to the technical field of cabinet door accessories, and in particular to a balanced stepless up-and-down adjustment structure. Background Technology

[0002] A cabinet typically consists of a cabinet body and cabinet doors connected to it. The cabinet doors are connected to the cabinet body by hinges and can rotate relative to the cabinet body, allowing them to be opened or closed during use. For sliding folding doors, multiple sets of sliding tracks need to be added to the cabinet body so that the cabinet doors can slide along the tracks to complete the storage. Conversely, by pulling it to the corner of the cabinet body and opening the hinges, the cabinet doors can be opened to cover the cabinet opening.

[0003] Whether it's a hinged cabinet door or a sliding folding door, after installation, manufacturing errors, installation benchmark deviations, or wear and tear on components due to long-term use may cause the cabinet door to shift vertically, resulting in a height difference between adjacent cabinet doors exceeding the allowable range. This not only affects the overall neatness of the cabinet's appearance but can also, in severe cases, hinder the normal opening and closing of the cabinet doors. Therefore, it is necessary to use an adjustment mechanism to correct the vertical position of the cabinet doors.

[0004] The common practice is to use a three-dimensional micro-adjustment hinge structure to connect the cabinet door to the cabinet body. By turning the adjusting bolt on the hinge, the connecting end is driven to move up and down within the hinge seat, thereby causing the cabinet door to adjust its vertical position synchronously. However, this method is only suitable for hinged cabinet doors and cannot be used for sliding or folding cabinet doors.

[0005] For sliding cabinet doors, existing adjustment mechanisms mostly rely on multiple preset slots to switch between different height levels. Fixing is achieved by inserting the locking pin into the corresponding height slot. This is a typical segmented adjustment, which can only be adjusted within a limited range. It is difficult to make precise matching based on the actual offset of the cabinet door. After adjustment, there are usually still slight height deviations, which is difficult to meet the usage scenarios that require high-precision installation. Summary of the Invention

[0006] To address the problem that existing adjustment structures cannot be adapted to sliding cabinet doors and are difficult to achieve stepless vertical adjustment, this application provides a balanced stepless vertical adjustment structure.

[0007] This application provides a balanced stepless vertical adjustment structure, which adopts the following technical solution: A balanced stepless up-and-down adjustment structure, comprising: A baffle is installed on the opposite side of the cabinet side panel, and the baffle and the cabinet side panel enclose an installation space for the sliding and storage of the door panel; The cabinet side panel has three parallel rails arranged from top to bottom. These three rails extend along the width of the cabinet side panel and are housed within the installation space. The upper rail is slidably connected to an upper pulley mechanism, the middle rail is slidably connected to a middle pulley mechanism, and the lower rail is slidably connected to a lower pulley mechanism. The middle pulley mechanism and the lower pulley mechanism both have floating space within the middle rail and the lower pulley mechanism within the lower rail. Vertical components; the cabinet door is hinged to the vertical components via hinges. A stepless adjustment device, the stepless adjustment device comprising an adjustment base and a connecting screw; The upper pulley mechanism includes an upper pulley seat and an upper pulley. A sliding joint is provided between the upper pulley seat and the vertical member, allowing the two to slide together vertically. The adjusting seat is fixed to one side of the vertical member, and the connecting screw is threadedly connected to both the adjusting seat and the upper pulley seat. The middle pulley mechanism and the lower pulley mechanism are slidably connected to the vertical member.

[0008] By adopting the above technical solution, when installing sliding and folding cabinet doors, the cabinet door is pre-connected to the vertical component via hinges. Then, the upper, middle, and lower sets of pulley mechanisms are respectively installed into the upper, middle, and lower rails, completing the installation foundation. When the cabinet door's height deviates and needs adjustment, simply tighten the connecting screw. The threaded transmission drives the upper pulley seat to slide vertically along the vertical component, simultaneously pushing the entire vertical component up and down, thereby adjusting the vertical height of the cabinet door hinged to the vertical component. Because the middle pulley mechanism has pre-reserved floating space in the middle rail and the lower pulley mechanism in the lower rail, the vertical component will not be restricted by the rails and will not get stuck when driving the middle and lower pulley mechanisms, allowing for smooth height adjustment at any position. Compared to segmented adjustment, this solution achieves stepless adjustment of any height through threaded transmission, accurately matching the actual offset of the cabinet door, meeting high-precision installation requirements, and is compatible with both sliding and folding cabinet doors, making it more widely applicable.

[0009] Preferably, the stepless adjustment device includes a horizontal drive shaft, which is rotatably mounted in the middle of the adjustment seat. One end of the horizontal drive shaft is provided with an internal hexagonal adjustment port, and the other end is provided with a first bevel tooth. The connecting screw is coaxially fixed with a second bevel tooth. The axes of the horizontal drive shaft and the connecting screw are perpendicular to each other, and the first bevel tooth and the second bevel tooth mesh with each other for transmission.

[0010] Two horizontal drive shafts are arranged opposite each other. The first bevel teeth of the two horizontal drive shafts mesh with the second bevel teeth at the same time. The outer walls of the two horizontal drive shafts are provided with annular grooves. The adjusting seat is provided with a vertical insertion hole. A keyed positioning pin is installed in the insertion hole. The axes of the horizontal drive shafts and the positioning pins are perpendicular to each other. The lower end of the positioning pins extends into the annular grooves of the horizontal drive shafts.

[0011] By adopting the above technical solution, staff can use a universal Allen wrench to insert into the Allen adjustment port from the side of the cabinet to complete the adjustment, without reserving extra operating space in the vertical direction of the cabinet door, reducing the space restriction for adjustment and significantly improving the convenience of operation; the positioning pin extends into the annular groove of the horizontal drive shaft, which can axially limit the rotation of the horizontal drive shaft without affecting it, preventing the horizontal drive shaft from coming out of the adjustment seat during the drive process, thus improving the stability and reliability of the structure.

[0012] Preferably, the sliding member is a T-shaped adjusting rod fixed on the side of the vertical member near the upper pulley seat. The upper pulley seat has a sliding groove in the vertical direction. The small end of the adjusting rod is inserted into the sliding groove and slides vertically therein, so as to realize the vertical sliding connection between the upper pulley seat and the vertical member.

[0013] By adopting the above technical solution, the matching structure of the T-shaped adjusting rod and the sliding groove is simple, the processing and assembly are easy, and the stability of the sliding process can be guaranteed, avoiding deviation and jamming during sliding, and ensuring smooth adjustment.

[0014] Preferably, the middle pulley mechanism consists of a middle pulley base and two sets of middle pulleys. The two sets of middle pulleys are respectively installed at the upper and lower ends of the middle pulley base and are slidably connected to the middle rail. A damper is also provided in the middle of the middle rail, and the damper is assembled with the middle pulley base through a connecting piece.

[0015] By adopting the above technical solution, the two sets of middle pulleys slide and cooperate with the upper and lower side walls of the middle rail respectively. The damper provides a buffering effect when the cabinet door is pushed and pulled, reducing the abnormal noise and vibration caused by the push and pull impact, and ensuring the stability of the middle pulley mechanism as a whole sliding along the middle rail.

[0016] Preferably, the middle pulley mechanism includes a floating pin, the middle pulley seat is provided with an elongated sliding hole along the vertical direction, the vertical component is fixedly provided with a floating pin at a corresponding position, and the floating pin slides into the elongated sliding hole to form a vertical floating fit.

[0017] A floating spring is fitted on the outside of the floating pin. One end of the floating spring is connected to the vertical component, and the other end is connected to the middle pulley seat.

[0018] By adopting the above technical solution, the cooperation between the floating pin and the elongated sliding hole can not only work with the upper stepless adjustment device to drive the vertical component to move up and down as a whole, ensuring that the floating stroke meets the adjustment requirements, but also maintain the relative positional stability of the middle pulley mechanism and the middle rail; while the floating spring can continuously provide preload, reduce the shaking sensation during the sliding process of the middle pulley mechanism, avoid the problem of the middle pulley loosening and shaking after the vertical component is adjusted to the position, and further improve the smoothness of the sliding adjustment process.

[0019] Preferably, the damper includes a base, a mounting base, a gripper, and a spring-loaded central column. The base is slidably connected within the central rail, and a buffer slide rail is laterally arranged inside the base. The mounting base is slidably assembled in the middle of the buffer slide rail. The spring-loaded central column is a T-shaped column, with its small end slidably passing through the side wall of the mounting base. The spring-loaded central column and the mounting base are axially slidingly engaged. A buffer spring is sleeved on the outer wall of the spring-loaded central column, with one end abutting against the inner wall of the mounting base and the other end abutting against the large end of the spring-loaded central column. The gripper is closably mounted on the outer side of the base near the mounting base, and the connecting member is clamped and fixed by the gripper, with the connecting member always pressing against the outer wall of the mounting base.

[0020] The damper further includes a push plate and a support. The push plate is disposed on one side of the mounting base and is movable relative to the mounting base. One end of the rebound column is slidably inserted through the side wall of the mounting base and is slidably connected to the push plate. The support is fixed to the outside of the mounting base, and a slot is formed between the support and the mounting base. One side of the push plate is inserted into the slot. The connector is always pressed against the support. The base is symmetrically provided with buffer springs along the central axis of the mounting base. The buffer springs are arranged outside the buffer slide rail. One end of the buffer spring is connected to the inner wall of the push plate, and the other end is connected to the side wall of the base.

[0021] The gripper includes two symmetrically hinged arms to the base. The middle of the two arms is elastically hinged by a torsion spring. The elastic force of the torsion spring drives the two arms to come together and clamp.

[0022] By adopting the above technical solution When the cabinet door is pushed to the storage position, the central pulley base moves the connecting parts synchronously. The connecting parts press against the support and mounting base, causing the mounting base to slide along the buffer slide rail towards the end of the base. During this process, the buffer spring and buffer compression spring are gradually compressed, absorbing the impact kinetic energy of the cabinet door, and finally slowly completing the storage, avoiding rigid collision between the cabinet door and the cabinet side panel, effectively reducing noise during use and improving the experience of pushing and pulling the cabinet door. The clamp uses the torsion spring force to clamp and fix the connecting parts, which is simple to assemble and can also ensure the stability of the connection between the damper and the central pulley base, ensuring a stable and reliable buffering effect.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. This application uses a threaded transmission structure to drive the overall displacement of the vertical components. Combined with the vertical floating space reserved by the middle pulley mechanism and the lower pulley mechanism, it can realize stepless continuous adjustment of the cabinet door height, accurately match the actual offset of the cabinet door, eliminate the slight height deviation left by the existing segmented adjustment, and meet the use requirements of high-precision installation. 2. The adjustment operation of this solution can be completed through the internal hexagon adjustment port on the side of the cabinet, without the need to reserve operation space on the front or vertical of the cabinet door, reducing the space limitation of adjustment, making the operation more convenient, and at the same time, it is compatible with different types of sliding cabinet doors such as push-pull and folding, making it more widely applicable; 3. This application adds a damper with a buffer structure inside the middle rail, which, together with the preload provided by the floating spring at the middle pulley mechanism, can not only ensure the smoothness of the cabinet door sliding, but also buffer the impact force when the cabinet door is closed, reduce abnormal noise and vibration, and improve the overall user experience. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the cabinet in the embodiment of this application.

[0025] Figure 2 This is a schematic diagram of the coordination between the balanced stepless up and down adjustment structure and the cabinet door in an embodiment of this application.

[0026] Figure 3 This is a schematic diagram showing the cooperation between the upper pulley mechanism, the middle pulley mechanism, the lower pulley mechanism, and the vertical components in the embodiments of this application.

[0027] Figure 4 yes Figure 3 The left view.

[0028] Figure 5 yes Figure 3 Exploded view.

[0029] Figure 6 yes Figure 2 Exploded view.

[0030] Figure 7 This is a schematic diagram of the cooperation between the upper pulley mechanism and the stepless adjustment device in the embodiments of this application.

[0031] Figure 8 This is a schematic diagram of the cooperation between the pulley mechanism and the damper in the embodiments of this application.

[0032] Figure 9 This is an exploded view of the damper in the embodiment of this application.

[0033] Figure 10 This is a cross-sectional view of the damper in an embodiment of this application.

[0034] Figure 11 This is a schematic diagram of the cooperation between the sliding wheel mechanism and the vertical component in an embodiment of this application.

[0035] Explanation of reference numerals in the attached figures: 1. Cabinet body; 11. Cabinet side panel; 12. Baffle; 13. Installation space; 14. Reinforcing profile; 15. Top rail; 16. Middle rail; 17. Bottom rail; 18. Hinges; 2. Cabinet doors; 3. Vertical components; 31. Mounting groove; 4. Upper pulley mechanism; 41. Upper pulley seat; 42. Upper pulley; 43. Adjustment rod; 44. Sliding groove; 5. Middle pulley mechanism; 51. Middle pulley base; 52. Middle pulley; 6. Lower pulley mechanism; 61. Lower pulley seat; 62. Lower pulley; 7. Stepless adjustment device; 71. Adjustment seat; 72. Connecting screw; 73. Horizontal drive shaft; 74. Internal hexagon adjustment port; 75. First bevel tooth; 76. Second bevel tooth; 77. Annular groove; 78. Positioning pin; 81. Damper; 811. Base; 812. Buffer slide rail; 813. Mounting seat; 814. Handle; 8141. Torsion spring; 815. Rebound center column; 8151. Buffer spring; 816. Push plate; 8161. Guide column; 817. Support; 818. Buffer compression spring; 82. Connector; 821. Connecting plate; 822. Connecting column. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-11 This application will be described in further detail.

[0037] Reference Figure 1 and Figure 2 The cabinet consists of a cabinet body 1 and a cabinet door 2 covering the opening of the cabinet body 1. The cabinet door 2 is a flip-up or foldable structure. The cabinet body 1 includes at least two sets of oppositely arranged door panels and a back panel. For example, the oppositely arranged top and bottom panels are connected by two opposite side panels of the cabinet body 1, and the back panel is connected to the back of the two side panels of the cabinet body 1, together forming a rectangular receiving cavity.

[0038] In this application, a baffle 12 is provided on the side of the cabinet 1 away from the center of the cabinet 1. The baffle 12 and the side of the cabinet 1 enclose an installation space 13 for sliding and storing the door panel. The volume of the installation space 13 is greater than the overall volume of the cabinet door 2. Specifically, the width of the installation space 13 is greater than the thickness of the cabinet door 2, the depth is greater than the length of the cabinet door 2, and the height is greater than the height of the cabinet door 2, so that the cabinet door 2 can be pushed into the installation space 13 until it is completely stored. When the cabinet needs to be closed, the cabinet door 2 is pulled out from the installation space 13 and flipped over to cover the opening side of the cabinet 1.

[0039] Three reinforcing profiles 14 are provided on the side of the cabinet 1 near the installation space 13, arranged horizontally in sequence along the vertical direction, parallel to each other, corresponding to the upper, middle and lower parts of the side panel of the cabinet 1 respectively; correspondingly, the upper reinforcing profile 14 is fixed with an upper rail 15 on the side near the baffle 12, the middle reinforcing profile 14 is fixed with a middle rail 16 on the side near the baffle 12, and the lower reinforcing profile 14 is fixed with a lower rail 17 on the side near the baffle 12, so that the upper rail 15, the middle rail 16 and the lower rail 17 are parallel to each other, and all three rails extend along the wide side of the side panel of the cabinet 1 and are all housed within the installation space 13.

[0040] This application discloses a balanced stepless up-and-down adjustment structure.

[0041] Reference Figure 2 and Figure 3 A balanced stepless vertical adjustment structure includes a vertically extending member 3. One side of the cabinet door 2 is hinged to the vertical member 3 via a hinge 18. The hinge 18 can be a conventional flip hinge or an angle-adjustable hinge, which can be flexibly selected according to the folding and storage requirements of the cabinet door 2. This embodiment is not strictly limited, but requires that the cabinet door 2 can rotate and open and close around the side. After the cabinet door 2 is pulled out from the storage installation space 13, it can rotate to cover the opening of the cabinet body 1, realizing the opening and closing of the cabinet. In this application, the upper rail 15, middle rail 16, and lower rail 17 are respectively equipped with an upper pulley mechanism 4, a middle pulley mechanism 5, and a lower pulley mechanism 6. The three sets of pulley mechanisms are assembled and connected to the vertical member 3, thereby realizing the sliding of the vertical member 3 and the cabinet door 2 as a whole along the rail, so that the cabinet door 2 can be pushed into the installation space 13 to complete the storage, or pulled out of the installation space 13 to unfold and close the cabinet body 1.

[0042] Specifically, refer to Figure 4 and Figure 7The upper pulley mechanism 4 includes an upper pulley seat 41, which is a long strip structure. The top of the seat has a mounting portion for installing the upper pulley 42, so that the upper pulley 42 is positioned on the side of the upper pulley seat 41 facing the side panel of the cabinet 1. The upper pulley 42 can be provided in one, two, or three sets: when one set is used, its axis is perpendicular to the length direction of the vertical member 3, and the upper pulley 42 rotates around its own axis and rolls along the bottom wall of the upper rail 15 along its length direction; when two sets are provided, the axes of the two sets of upper pulleys 42 are aligned with the length direction of the vertical member 3, thus rotating around their own axes and running along the side wall of the upper rail 15 along its length direction; when three sets are provided, one set is arranged in the first manner, and the second set is arranged in the second manner, so that the upper pulley 42 simultaneously contacts the bottom wall and side wall of the upper rail 15, further enhancing stability during sliding and effectively reducing the risk of swaying or tilting.

[0043] The upper pulley seat 41 and the vertical component 3 are vertically slidably connected by a sliding joint. Specifically, the vertical component 3 has a mounting groove 31 in the vertical direction, in which the upper pulley seat 41 is embedded. When the upper pulley seat 41 is subjected to force, it can move relative to the vertical component 3. The sliding joint is an adjusting rod 43. Furthermore, a T-shaped adjusting rod 43 is fixedly provided on the side of the vertical component 3 near the upper pulley seat 41. Correspondingly, a matching sliding groove 44 is provided on the upper pulley seat 41 in the vertical direction. The small end of the adjusting rod 43 is inserted into the sliding groove 44. Alternatively, the adjusting rod 43 can be designed as an I-shaped rod, and the sliding groove 44 is a trapezoidal groove. This ensures that the small end will not come out in the horizontal direction after being inserted, but can only slide relative to the vertical direction. This can maintain the stability of the connection between the two and allow the adjusting rod 43 to slide vertically along the sliding groove 44, thereby realizing the vertical sliding fit between the upper pulley seat 41 and the vertical component 3.

[0044] This embodiment includes a stepless adjustment device 7, as shown in the reference. Figure 5 and Figure 6 It is installed between the vertical member 3 and the upper pulley seat 41 to drive the upper pulley seat 41 to move vertically relative to the vertical member 3. Specifically, it includes an adjusting seat 71 and a connecting screw 72. The adjusting seat 71 is fixedly connected to the side of the vertical member 3 near the upper pulley seat 41. The connecting screw 72 passes through the assembly part at the bottom of both the adjusting seat 71 and the upper pulley seat 41 and forms a threaded engagement with both. When the connecting screw 72 is rotated, the upper pulley seat 41 can be driven to slide vertically along the adjusting rod 43 through the threaded transmission, thereby driving the vertical member 3 and the cabinet door 2 to adjust their height up and down as a whole.

[0045] To facilitate adjustment, a horizontal drive shaft 73 is rotatably mounted in the middle of the adjustment seat 71. One end of the horizontal drive shaft 73 has an internal hexagon adjustment port 74, and the other end is fixedly provided with a first bevel gear 75. A second bevel gear 76 is coaxially fixed on the connecting screw 72. The first bevel gear 75 and the second bevel gear 76 mesh with each other, and the axes of the horizontal drive shaft 73 and the connecting screw 72 are perpendicular to each other. By inserting a general-purpose internal hexagon wrench into the internal hexagon adjustment port 74 and rotating it, the connecting screw 72 can be rotated through the meshing of the bevel gears. There is no need to reserve extra operating space vertically in the cabinet door 2, which greatly reduces the space restriction for adjustment and makes the operation more convenient.

[0046] In this embodiment, two horizontal drive shafts 73 are symmetrically arranged. The first bevel gear 75 of the two horizontal drive shafts 73 simultaneously meshes with the second bevel gear 76. The operator can adjust from either the left or right side according to the actual situation of the installation space 13, making it more adaptable. To prevent the horizontal drive shafts 73 from axially dislodging during rotation, annular grooves 77 are provided on the outer walls of both horizontal drive shafts 73. The adjusting seat 71 is provided with a vertical insertion hole, and a keyed positioning pin 78 is installed in the insertion hole. The lower end of the positioning pin 78 extends into the annular groove 77 of the corresponding horizontal drive shaft 73, completing the axial limit without affecting the normal rotation of the horizontal drive shaft 73, thus improving the overall stability of the structure.

[0047] Reference Figure 6 and Figure 8 The balance stepless up and down adjustment structure of this application also includes a middle pulley mechanism 5 and a lower pulley mechanism 6. The middle pulley mechanism 5 is slidably connected inside the middle rail 16, and the lower pulley mechanism 6 is inside the lower rail 17. Both the middle pulley mechanism 5 and the lower pulley mechanism 6 have floating space inside the middle rail 16 and the lower pulley mechanism 6, respectively.

[0048] The middle pulley mechanism 5 is installed inside the middle rail 16 and includes a middle pulley seat 51 and two sets of middle pulleys 52. The two sets of middle pulleys 52 are rotatably installed at the upper and lower ends of the middle pulley seat 51, respectively. Taking the installation of one set of middle pulleys 52 as an example, the installation is described in detail. One set of middle pulleys 52 includes at least one guide wheel unit consisting of a vertically arranged moving wheel and a horizontally arranged directional wheel. The vertical arrangement refers to the fact that the axis of the moving wheel is perpendicular to the length direction of the vertical member 3. At this time, the moving wheel rotates around its own axis and rolls along the bottom wall of the middle rail 16 in its length direction. The horizontal arrangement refers to the fact that the axis of the directional wheel is parallel to the length direction of the vertical member 3. The directional wheel rotates around its own axis and runs along the side wall of the middle rail 16 in its length direction. The upper and lower sets of guide wheel units cooperate with the middle rail 16 at the same time, which can effectively limit the tilt of the middle pulley seat 51 and ensure the smoothness of the overall sliding.

[0049] The middle pulley seat 51 is also a long strip structure. The middle pulley seat 51 is also embedded in the mounting groove 31. The middle pulley seat 51 and the vertical component 3 are connected vertically by a floating pin: the middle pulley seat 51 has an elongated sliding hole along the vertical direction. The floating pin is fixedly installed at the corresponding position of the vertical component 3. The floating pin slides into the elongated sliding hole, so that the two can have relative vertical displacement. At the same time, a floating spring is also sleeved on the outside of the floating pin. One end of the floating spring is connected to the vertical component 3 and the other end is connected to the middle pulley seat 51, which helps to cooperate with the upper adjustment structure to achieve stepless adjustment of the overall height.

[0050] In this application, a damping buffer assembly is also installed in the middle of the central rail 16. The damper 81 is assembled and connected to the central pulley seat 51 through the connector 82, and is used to buffer the impact force when the cabinet door 2 is pushed in and stored in place.

[0051] Reference Figure 8 , Figure 9 and Figure 10 The damper 81 includes a base 811, a mounting base 813, a gripper 814, and a spring-loaded central column 815. The base 811 is slidably connected within the central rail 16, and a buffer slide rail 812 is transversely arranged inside the base 811. The mounting base 813 is slidably assembled in the middle of the buffer slide rail 812. The spring-loaded central column 815 is a T-shaped column, with its small end slidably passing through the side wall of the mounting base 813. The spring-loaded central column 815 and the mounting base 813 are axially slidingly engaged. A buffer spring 8151 is sleeved on the outer wall of the spring-loaded central column 815. One end of the buffer spring 8151 abuts against the inner wall of the mounting base 813, and the other end abuts against the large end of the spring-loaded central column 815. The gripper 814 is closably installed on the outer side of the base 811 near the mounting base 813. The connector 82 is clamped and fixed by the gripper 814, and the connector 82 is always pressed against the outer wall of the mounting base 813.

[0052] The damper 81 also includes a push plate 816 and a support 817. The push plate 816 is disposed on one side of the mounting base 813 and is movable relative to the mounting base 813. For example, a guide post 8161 is provided on the push plate 816, and a guide groove is provided in the length direction of the mounting base 813, so that the guide post 8161 extends into the guide groove. The rebound column 815 is slidably inserted through one end of the side wall of the mounting base 813 and is slidably connected to the push plate 816. The support... 817 is fixed to the outside of the mounting base 813. A slot is formed between the support 817 and the mounting base 813. One side of the push plate 816 is inserted into the slot. The connector 82 is always pressed against the support 817. The base 811 is symmetrically provided with buffer springs 818 along the central axis of the mounting base 813. The buffer springs 818 are arranged outside the buffer slide rail 812. One end of the buffer spring 818 is connected to the inner wall of the push plate 816 and the other end is connected to the side wall of the base 811.

[0053] The gripper 814 includes two symmetrically hinged arms to the base 811. The middle of the two grippers is elastically hinged by a torsion spring 8141. The elastic force of the torsion spring 8141 drives the two grippers to come together and clamp. The connector 82 includes a connecting plate 821 and a connecting post 822. In application, the connecting plate 821 is riveted to the middle of the middle pulley seat 51. Then, the two sets of middle pulleys 52 are symmetrical about the center of the connecting plate 821. The connecting post 822 is a circular post that protrudes towards the side closer to the middle rail 16. The gripper 814 can clamp and fix the connecting post 822.

[0054] When the user pushes the cabinet door 2, the middle pulley seat 51 drives the connecting piece 82 to move synchronously towards the end of the middle rail 16. The base 811 will first reach the deepest side of the installation space 13, and one side of the base 811 will abut against the side wall of the end of the middle rail 16. After that, the middle pulley seat 51 will continue to drive the connecting piece 82 to move towards the end under the action of the thrust. The connecting piece 82 pushes against the support 817, causing the mounting base 813 to slide along the buffer slide rail 812 towards the end of the base 811. During this process, the buffer spring 8151 is gradually compressed by the large end of the rebound column 815, initially absorbing the inertial kinetic energy of the cabinet door 2. Subsequently, the push plate 816 is pushed by the rebound column 815 and gradually moves towards the base 811. The two sets of symmetrically arranged buffer compression springs 818 are also squeezed and compressed by the push plate 816, further distributing and absorbing the remaining impact force, so that the moving speed of the cabinet door 2 gradually decreases, and finally slowly enters the position to complete the storage.

[0055] In this embodiment, refer to Figure 11 The sliding pulley mechanism 6 includes a sliding pulley seat 61 and a sliding pulley 62. The sliding pulley 62 is set in the same way as the middle pulley 52. ​​The sliding pulley seat 61 is embedded in the mounting groove 31. The sliding pulley seat 61 can slide vertically within the mounting groove 31. Only the dimensions of each component are adjusted to match the mounting space 13 of the lower rail 17 to meet the force balance requirements of the overall structure. The specific structure will not be described again here.

[0056] The implementation principle of a balanced stepless vertical adjustment structure in this application is as follows: During the installation of cabinet door 2, if there is a height difference between the two ends of cabinet door 2, simply insert a universal Allen wrench into the Allen adjustment port 74 on the side of cabinet body 1, and rotate the horizontal drive shaft 73. This will drive the connecting screw 72 to rotate through the meshing of a pair of bevel teeth. The connecting screw 72 will drive the upper pulley seat 41 to slide along the vertical adjustment rod 43 through the threaded transmission, thereby driving the vertical component 3 and cabinet door 2 to move up and down as a whole. Since the middle pulley mechanism 5 and the lower pulley mechanism 6 are both reserved with vertical floating space, and with the pre-tightening support of the floating spring, the vertical component 3 can always maintain overall force stability during the movement, and can achieve locking at any position, completing the stepless continuous adjustment of the height of cabinet door 2 until it is adjusted to a level state that meets the installation requirements.

[0057] During the daily use of the cabinet door 2, when the cabinet door 2 is pushed to the storage position, the middle pulley seat 51 drives the connecting piece 82 to move synchronously. The buffer spring 8151 and the buffer compression spring 818 are gradually compressed, absorbing the impact kinetic energy of the cabinet door 2 layer by layer. This allows the cabinet door 2 to decelerate and slowly complete the storage, avoiding rigid collisions between the cabinet door 2 and the side panel of the cabinet body 1. This effectively reduces collision noise during use, improves the user experience of the sliding cabinet door 2, and ensures that the cabinet door 2 remains stable and reliable during long-term use.

[0058] The above are all preferred embodiments of this application. These embodiments are merely explanations of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A balanced stepless up-and-down adjustment structure, characterized in that, include: A baffle (12) is set on the opposite side of the cabinet (1) side panel, and the baffle (12) and the cabinet (1) side panel enclose each other to form an installation space (13) for sliding and storing the door panel; The upper rail (15), middle rail (16), and lower rail (17) are arranged parallel to each other from top to bottom along the side panel of the cabinet (1). The three rails extend along the wide side of the side panel of the cabinet (1) and are housed in the installation space (13). The upper rail (15) is slidably connected to the upper pulley mechanism (4), the middle rail (16) is slidably connected to the middle pulley mechanism (5), and the lower rail (17) is slidably connected to the lower pulley mechanism (6). The middle pulley mechanism (5) has floating space in the middle rail (16), and the lower pulley mechanism (6) has floating space in the lower rail (17). The vertical component (3) and the cabinet door (2) are hinged to the vertical component (3) via a hinge (18); A stepless adjustment device (7) is provided, which includes an adjustment seat (71) and a connecting screw (72). The upper pulley mechanism (4) includes an upper pulley seat (41) and an upper pulley (42). A sliding joint is provided between the upper pulley seat (41) and the vertical member (3) so that the two are slidably connected in the vertical direction. The adjusting seat (71) is fixed to one side of the vertical member (3), and the connecting screw (72) is threadedly connected to both the adjusting seat (71) and the upper pulley seat (41). The middle pulley mechanism (5) and the lower pulley mechanism (6) are slidably connected to the vertical member (3) respectively.

2. The balanced stepless up-and-down adjustment structure according to claim 1, characterized in that, The stepless adjustment device (7) includes a horizontal drive shaft (73), which is rotatably mounted in the middle of the adjustment seat (71). One end of the horizontal drive shaft (73) is provided with an internal hexagonal adjustment port (74), and the other end is provided with a first bevel tooth (75). The connecting screw (72) is coaxially fixed with a second bevel tooth (76). The axes of the horizontal drive shaft (73) and the connecting screw (72) are perpendicular to each other. The first bevel tooth (75) and the second bevel tooth (76) mesh and drive each other.

3. The balanced stepless up-and-down adjustment structure according to claim 2, characterized in that, Two horizontal drive shafts (73) are arranged opposite to each other. The first bevel teeth (75) of the two horizontal drive shafts (73) mesh with the second bevel teeth (76) at the same time. The outer walls of the two horizontal drive shafts (73) are provided with annular grooves (77). The adjusting seat (71) is provided with a vertical insertion hole. A keyed positioning pin (78) is installed in the insertion hole. The axes of the horizontal drive shafts (73) and the positioning pins (78) are perpendicular to each other. The lower end of the positioning pins (78) extends into the annular grooves (77) of the horizontal drive shafts (73).

4. The balanced stepless up-and-down adjustment structure according to claim 1, characterized in that, The sliding member is a T-shaped adjusting rod (43) fixed on the side of the vertical member (3) near the upper pulley seat (41). The upper pulley seat (41) has a sliding groove (44) in the vertical direction. The small end of the adjusting rod (43) is inserted into the sliding groove (44) and slides vertically therein, so as to realize the vertical sliding connection between the upper pulley seat (41) and the vertical member (3).

5. The balanced stepless up-and-down adjustment structure according to claim 1, characterized in that, The middle pulley mechanism (5) consists of a middle pulley seat (51) and two sets of middle pulleys (52). The two sets of middle pulleys (52) are respectively installed at the upper and lower ends of the middle pulley seat (51) and are slidably connected to the middle rail (16). The middle rail (16) is also provided with a damper (81), which is assembled with the middle pulley seat (51) through a connector (82).

6. The balanced stepless up-and-down adjustment structure according to claim 5, characterized in that, The middle pulley mechanism (5) includes a floating pin. The middle pulley seat (51) has an elongated sliding hole in the vertical direction. The vertical component (3) is fixedly provided with a floating pin at the corresponding position. The floating pin slides into the elongated sliding hole to form a vertical floating fit.

7. The balanced stepless up-and-down adjustment structure according to claim 6, characterized in that, A floating spring is fitted on the outside of the floating pin. One end of the floating spring is connected to the vertical member (3), and the other end is connected to the middle pulley seat (51).

8. The balanced stepless up-and-down adjustment structure according to claim 5, characterized in that, The damper (81) includes a base (811), a mounting base (813), a gripper (814), and a spring-loaded central column (815). The base (811) is slidably connected within the central rail (16), and a buffer slide rail (812) is laterally arranged inside the base (811). The mounting base (813) is slidably assembled in the middle of the buffer slide rail (812). The spring-loaded central column (815) is a T-shaped column, with its small end slidably passing through the side wall of the mounting base (813). The spring-loaded column (815) is axially slidingly fitted with the mounting base (813); a buffer spring (8151) is sleeved on the outer wall of the spring-loaded column (815), one end of the buffer spring (8151) abuts against the inner wall of the mounting base (813), and the other end abuts against the large end of the spring-loaded column (815); the clamp (814) is closably installed on the outer side of the base (811) near the mounting base (813), the connector (82) is clamped and fixed by the clamp (814), and the connector (82) is always pressed against the outer wall of the mounting base (813).

9. A balanced stepless up-and-down adjustment structure according to claim 8, characterized in that, The damper (81) further includes a push plate (816) and a support (817), wherein the push plate (816) is disposed on one side of the mounting base (813) and the push plate (816) is displaceable relative to the mounting base (813); the rebound column (815) slides through one end of the side wall of the mounting base (813) and is slidably connected to the push plate (816); the support (817) is fixed to the outside of the mounting base (813), and the support (817) and the mounting base (813) are connected. 3) A slot is formed between them, one side of the push plate (816) is inserted into the slot, the connector (82) is always pressed against the support (817), the base (811) is symmetrically provided with a buffer spring (818) along the central axis of the mounting base (813), the buffer spring (818) is arranged outside the buffer slide rail (812), one end of the buffer spring (818) is connected to the inner wall of the push plate (816), and the other end is connected to the side wall of the base (811).

10. A balanced stepless up-and-down adjustment structure according to claim 8, characterized in that, The clamp (814) includes two clamping arms symmetrically hinged to the base (811). The middle of the two clamping arms is elastically hinged by a torsion spring (8141). The elastic force of the torsion spring (8141) drives the two clamping arms to come closer to each other and clamp together.

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