Three-door mutual moving structure

Abstract

The invention relates to the technical field of sliding door assemblies, and provides a three-door mutual moving structure which is characterized in that a lifting butt joint structure composed of a first hanging block, a second hanging block, a first height adjusting mechanism and a second height adjusting mechanism is arranged on a first hanging wheel and a third hanging wheel, and the lifting butt joint structure is matched with a first L-shaped block and a second L-shaped block which are preassembled on a sliding door; the split type installation of the sliding door and the mutual moving assembly is realized; during installation, the door body does not need to be obliquely inserted into the guide rail, hitching and falling of the sliding door can be completed only by clamping the first connecting part and the first butt joint part and clamping the second connecting part and the second butt joint part and controlling the hitching block to ascend and descend by adjusting the first height adjusting mechanism and the second height adjusting mechanism, and the sliding door can be easily separated through reverse operation during disassembly. The problems of door frame scraping, operation space limitation, large installation difficulty and the like caused by overall inclined installation of a traditional three-door mutual-moving door are thoroughly solved, and the convenience of installation and disassembly is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of sliding door assembly technology, and more particularly to a three-door interlocking structure. Background Technology

[0002] With the increasing demand for customized home furnishings, three-door sliding doors are widely used in modern home design due to their aesthetic appeal and space-saving features. These sliding doors typically consist of three doors that slide left and right via guide rails, allowing users to open any side or the middle section as needed. However, existing three-door sliding structures have revealed numerous problems during actual installation and subsequent maintenance, particularly in terms of ease of assembly and disassembly.

[0003] Traditional three-door sliding doors are cumbersome and inefficient to install and dismantle. Existing structures typically require the door panels to be assembled with the rollers first, and then a professional must tilt the door panels at a certain angle and hang them one by one into the upper guide rail. This process requires multiple people to work together, and the slightest mistake can cause the rollers to jam or the rails to deform.

[0004] The purpose of this invention is to solve the problem that the traditional three-door sliding door rollers need to be assembled with the door leaf and then tilted to hang on the guide rail, which leads to difficulties in installation and disassembly and inconvenience in operation. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that traditional three-door sliding door rollers need to be assembled with the door leaf and then tilted to hang on the guide rail, resulting in difficult installation and disassembly and inconvenient operation. This invention adopts the following technical solution:

[0006] A three-door sliding structure includes a door frame and a sliding door. The door frame includes a guide rail, and a sliding assembly for linkage with the sliding door is installed within the guide rail. The sliding assembly includes a first pulley assembly, a second pulley assembly, and a third pulley assembly. The third pulley assembly has the same structure as the second pulley assembly. The first pulley assembly includes a first connecting rod, and its two ends are respectively connected to a first hanging wheel and a second hanging wheel with the same structure. The first hanging wheel includes a first sleeve and a first L-shaped block. A first hook block is slidably fitted within the first sleeve, and the first sleeve is provided with a function to adjust the height of the first hook block. The first height adjustment mechanism includes a first hook block with a first docking part, a first L-shaped block with a first connecting part that engages with the first docking part, a second pulley assembly including a second connecting rod, and a third and fourth hanging wheels with the same structure connected to both ends of the second connecting rod, the third hanging wheel including a second sleeve and a second L-shaped block, a second hook block slidably mounted inside the second sleeve, a second height adjustment mechanism for adjusting the height of the second hook block, a second hook block with a second docking part, and a second connecting part that engages with the second docking part of the second L-shaped block.

[0007] As described above, in a three-door interlocking structure, the first connecting part and the first docking part are detachably connected by a snap-fit ​​structure. The first connecting part is configured as an outwardly protruding protrusion structure, and the first docking part is correspondingly configured as an inwardly recessed receiving groove structure. The shape of the receiving groove is adapted to the shape of the protrusion.

[0008] As described above, in a three-door interlocking structure, the second connecting part and the second docking part are detachably connected by a snap-fit ​​structure. The second connecting part is configured as an outwardly protruding protrusion structure, and the second docking part is correspondingly configured as an inwardly recessed receiving groove structure. The shape of the receiving groove is adapted to the shape of the protrusion.

[0009] As described above, in a three-door interlocking structure, the first height adjustment mechanism includes a first threaded hole on one side of the first sleeve frame, a first bolt is provided in the first threaded hole, the first bolt is threadedly connected to the first threaded hole, and the first hook block has a first inclined surface on the side facing the first bolt.

[0010] In the three-door interlocking structure described above, the second height adjustment mechanism includes a second threaded hole opened on one side of the second frame, a second bolt provided in the second threaded hole, the second bolt being threadedly connected to the second threaded hole, and a second inclined surface provided on the side of the second hook block facing the second bolt.

[0011] In the three-door interlocking structure described above, the bottom of the first mounting block has a first groove, the first L-shaped block has a first protrusion, the first protrusion has a first set screw, the first set screw and the first protrusion are connected by threads and partially extend into the first groove, and the inner wall curvature of the first groove is adapted to the outer peripheral arc surface of the first set screw; the bottom of the second mounting block has a second groove, the second L-shaped block has a second protrusion, the second protrusion has a second set screw, the second set screw and the second protrusion are connected by threads and partially extend into the second groove, and the inner wall curvature of the second groove is adapted to the outer peripheral arc surface of the second set screw.

[0012] As described above, in a three-door interlocking structure, the first hanging wheel includes a first connecting block fixedly connected to the first sleeve frame, the first connecting block having a first slot for accommodating one end of the first connecting rod, and the first connecting block having a first through groove for accommodating the first hook block; the third hanging wheel includes a second connecting block fixedly connected to the second sleeve frame, the second connecting block having a second slot for accommodating one end of the second connecting rod, and the second connecting block having a second through groove for accommodating the second hook block.

[0013] In the three-door interlocking structure described above, a horizontal pulley is rotatably mounted on one end of the first connecting block. The interlocking assembly includes a first flexible cable and a second flexible cable. One end of the first flexible cable is fixedly connected to the fourth hanging wheel of the second pulley assembly, and the other end of the first flexible cable passes around the horizontal pulley of the first hanging wheel and is fixedly connected to the fourth hanging wheel of the third pulley assembly. One end of the second flexible cable is fixedly connected to the third hanging wheel of the second pulley assembly, and the other end of the first flexible cable passes around the horizontal pulley of the second hanging wheel and is fixedly connected to the third hanging wheel of the third pulley assembly.

[0014] As described above, in a three-door interlocking structure, the guide rail has a first guide groove, a second guide groove, and a third guide groove. The first pulley assembly is housed in the first guide groove and can slide along its length. The second pulley assembly is housed in the second guide groove, and the third pulley assembly is housed in the third guide groove. A plurality of first pulleys are rotatably arranged on the first sleeve frame. The first pulleys are used to roll and support and guide the first pulley assembly in the first guide groove. A plurality of second pulleys are rotatably arranged on the second sleeve frame. The second pulleys are used to roll and support and guide the second pulley assembly in the second guide groove.

[0015] As described above, in a three-door interlocking structure, the third hanging wheel includes a third connecting block. A buffer assembly is installed on one side of the third connecting block. The buffer assembly includes a housing. Several third pulleys are rotatably arranged on the side wall of the housing. A gas spring is slidably arranged inside the housing. Both ends of the gas spring are equipped with hooks. A U-shaped sliding groove hook is opened on the inner cavity side wall of the housing. The hook has a hinge hole. Both ends of the gas spring are hinged to the hook through the hinge hole. A guide block is slidably arranged in the U-shaped sliding groove on the inner cavity side wall of the housing. The guide block is fixedly connected to the hook. A locking hole is opened on the top of the hook. The locking hole is used to cooperate with a limiting member installed in the guide rail.

[0016] Implementing the embodiments of the present invention has the following beneficial effects:

[0017] 1. In this invention, a liftable docking structure consisting of a first hook block, a second hook block, and first and second height adjustment mechanisms is set on the first and third hook wheels. Combined with the first L-shaped block and the second L-shaped block pre-installed on the sliding door, the sliding door and the mutual sliding component are installed separately. During installation, there is no need to tilt the door body into the guide rail. The first connecting part and the first docking part, and the second connecting part and the second docking part are simply engaged. The hooking and lowering of the sliding door can be completed by adjusting the first height adjustment mechanism and the second height adjustment mechanism to control the lifting of the hook block. During disassembly, the door can be easily separated by reversing the operation. This completely avoids the problems of door frame scratching, limited operating space, and difficult installation caused by the overall tilting installation of traditional three-door mutual sliding doors, and significantly improves the convenience of installation and disassembly. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of a three-gate mutual shifting structure according to the present invention.

[0020] Figure 2 This is an exploded view of a three-gate mutual shift structure of the present invention.

[0021] Figure 3 This is a schematic diagram of the guide rail of a three-door mutual shift structure according to the present invention.

[0022] Figure 4 This is a schematic diagram of the structure of a mutual shift component of a three-gate mutual shift structure according to the present invention.

[0023] Figure 5 yes Figure 3 A structural diagram from another angle.

[0024] Figure 6 This is a schematic diagram of the second pulley assembly of a three-door mutual shift structure according to the present invention.

[0025] Figure 7 This is a schematic diagram of the structure of a buffer assembly with a three-gate mutual shift structure according to the present invention.

[0026] Figure 8 This is a schematic diagram of the hook structure of a three-door mutual shifting structure according to the present invention.

[0027] Figure 9 This is a schematic diagram of the third hanging wheel of a three-door mutual displacement structure according to the present invention.

[0028] Figure 10 This is an exploded view of the third hanging wheel of a three-door mutual displacement structure according to the present invention.

[0029] Figure 11 yes Figure 10 A structural diagram from another angle.

[0030] Figure 12 This is a schematic diagram of the first pulley assembly of a three-door mutual shift structure according to the present invention.

[0031] Figure 13 This is a schematic diagram of the first hanging wheel of a three-door mutual shifting structure of the present invention.

[0032] Figure 14 This is an exploded view of the first hanging wheel of a three-door interlocking structure according to the present invention.

[0033] Figure 15 yes Figure 14 A structural diagram from another angle. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] like Figures 1 to 15As shown, this invention proposes a three-door sliding structure, including a door frame 1 and a sliding door 2. The door frame 1 includes a guide rail 11, and a sliding assembly 3 for linkage with the sliding door 2 is installed inside the guide rail 11. The sliding assembly 3 includes a first pulley assembly 31, a second pulley assembly 32, and a third pulley assembly 33. The third pulley assembly 33 has the same structure as the second pulley assembly 32. The first pulley assembly 31 includes a first connecting rod 311, and the two ends of the first connecting rod 311 are respectively connected to a first hanging wheel 312 and a second hanging wheel 313 with the same structure. The first hanging wheel 312 includes a first sleeve 3122 and a first L-shaped block 3124. A first hook block 3123 is slidably fitted inside the first sleeve 3122. The first sleeve 3122 is provided with a first height adjustment mechanism for adjusting the height of the first hook block 3123. The first hook block 3123 is provided with a first docking part 31233, and the first L-shaped block 3124 is provided with a first connecting part 31241 that engages with the first docking part 31233. The second pulley assembly 32 includes a second connecting rod 321. The two ends of the second connecting rod 321 are respectively connected to a third hanging wheel 322 and a fourth hanging wheel 323 with the same structure. The third hanging wheel 322 includes a second sleeve 3222 and a second L-shaped block 3226. The second hook block 3223 is slidably fitted inside the second sleeve 3222. The second sleeve 3222 is provided with a second height adjustment mechanism for adjusting the height of the second hook block 3223. The second hook block 3223 is provided with a second docking part 32231, and the second L-shaped block 3226 is provided with a second connecting part 32261 that engages with the second docking part 32231.During installation, the first L-shaped block 3124 and the second L-shaped block 3226 are first pre-fixed onto the sliding door 2; then, the first pulley assembly 31, the second pulley assembly 32, and the third pulley assembly 33 are installed into the guide rail 11; next, by operating the first and second height adjustment mechanisms, the first hook block 3123 is driven to slide upward within the first frame 3122, so that the first docking part 31233 is in a high position, and at the same time, the second hook block 3223 is driven to slide upward within the second frame 3222, so that the second docking part 32231 is also in a high position, thereby forming an installation window on the first hanging wheel 312 and the third hanging wheel 322 for easy docking, and then the sliding door 2 with the first L-shaped block 3124 installed is installed. The sliding door 2 of the first L-shaped block 3124 and the second L-shaped block 3226 are placed vertically, which further allows the first connecting part 31241 of the first L-shaped block 3124 and the second connecting part 32261 of the second L-shaped block 3226 to be smoothly inserted into the first docking part 31233 and the second docking part 32231 in the high position, respectively, to avoid the sliding door 2 colliding with the door frame 1. After installation, the first and second height adjustment mechanisms are adjusted in reverse to make the first hook block 3123 and the second hook block 3223 slide downward, driving the sliding door 2 down as a whole until the bottom of the sliding door 2 contacts the door frame 1 and is stably supported. Disassembly is done in reverse: first, the hook blocks are raised to make the sliding door 2 detach from the door frame 1, and then the sliding door 2 can be removed. This effectively solves the problems of difficult installation and disassembly and easy scratching of the door frame 1 caused by the need to tilt and hang the traditional three-door sliding door on the guide rail 11.

[0036] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the first connecting part 31241 and the first docking part 31233 are detachably connected by a snap-fit ​​structure. The first connecting part 31241 is configured as an outwardly protruding protrusion structure, and the first docking part 31233 is correspondingly configured as a concave receiving groove structure, the shape of which is adapted to the shape of the protrusion. The second connecting part 32261 and the second docking part 32231 are detachably connected by a snap-fit ​​structure. The second connecting part 32261 is configured as an outwardly protruding protrusion structure, and the second docking part 32231 is correspondingly configured as a concave receiving groove structure, the shape of which is adapted to the shape of the protrusion. During installation, after the first hanging block 3123 is raised to a high position by the first height adjustment mechanism, the sliding door 2 moves closer in the horizontal direction, causing the protrusion of the first connecting part 31241 to slide into the receiving groove of the first docking part 31233 from the side, thereby achieving the hanging. Similarly, the second connecting part 32261 and the second docking part 32231 also adopt the same snap-fit ​​structure. By setting a snap-fit ​​lateral hook-fit structure between the first connecting part 31241 and the first docking part 31233, and between the second connecting part 32261 and the second docking part 32231, a convenient assembly of the sliding door 2 and the hanging wheel assembly is achieved. This connection method does not require vertical alignment or tilting of the door body. Simply push the sliding door 2 horizontally along the guide rail 11 to complete the synchronous hook-fitting of the first connecting part 31241 and the first docking part 31233, and the second connecting part 32261 and the second docking part 32231, thus avoiding collision with the door frame 1.

[0037] Optionally, in some embodiments, the first docking portion 31233 and the second docking portion 32231 are protrusions, and the first connecting portion 31241 and the second connecting portion 32261 are correspondingly recessed receiving groove structures.

[0038] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the first height adjustment mechanism includes a first threaded hole 31221 formed on one side of the first sleeve frame 3122, a first bolt 31232 disposed in the first threaded hole 31221, the first bolt 31232 being threadedly connected to the first threaded hole 31221, and a first inclined surface 31231 provided on the side of the first hook block 31232 facing the first bolt 31232. The second height adjustment mechanism includes a second threaded hole 32221 formed on one side of the second sleeve frame 3222, a second bolt 32222 disposed in the second threaded hole 32221, the second bolt 32222 being threadedly connected to the second threaded hole 32221, and a second inclined surface 32233 provided on the side of the second hook block 3223 facing the second bolt 32222. When the first bolt 31232 is rotated, its end abuts against the first inclined surface 31231, and the first hook block 3123 is pushed to slide up or down within the first frame 3122 using the inclined plane transmission principle, thereby adjusting the height of the first docking part 31233. Similarly, when the second bolt 32222 is rotated, its end acts on the second inclined surface 32233, driving the second hook block 3223 to slide along the second frame 3222, thereby adjusting the height of the second docking part 32231. Through the cooperation of the first bolt 31232 with the first inclined surface 31231 and the second bolt 32222 with the second inclined surface 32233, precise lifting control of the first hook block 3123 and the second hook block 3223 is achieved, facilitating the installation and disassembly of the sliding door 2. This structure is easy to adjust, responsive, and reliable in locking, and can be operated without additional tools, significantly improving the assembly efficiency and ease of use of the three-door sliding structure.

[0039] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, a first groove 31234 is formed at the bottom of the first hook block 3123, the first L-shaped block 3124 is provided with a first protrusion 31242, a first set screw 31243 is sleeved inside the first protrusion 31242, the first set screw 31243 is threadedly connected to the first protrusion 31242 and partially extends into the first groove 31234, and the curvature of the inner wall of the first groove 31234 is similar to that of the first set screw 31242. The outer peripheral arc surface of 43 is adapted to the first L-shaped block 3223. The bottom of the second hook block 3223 is provided with a second groove 32232. The second L-shaped block 3226 is provided with a second protrusion 32262. The second protrusion 32262 is fitted with a second set screw 32263. The second set screw 32263 and the second protrusion 32262 are connected by threads and partially extend into the second groove 32232. The inner wall arc of the second groove 32232 is adapted to the outer peripheral arc surface of the second set screw 32263. After the first L-shaped block 3124 and the first hook block 3123 are engaged, the first set screw 31243 is rotated so that its end gradually embeds into the first groove 31234 and fits tightly against its arc-shaped inner wall, thereby locking the connection state. Similarly, rotating the second set screw 32263 can extend its end into the interior of the second groove 32232, thereby enhancing the connection stability between the second connecting part 32261 and the second mating part 32231. After the first set screw 31243 is screwed in, it engages with the arc surface of the first groove 31234, which can effectively prevent the first connecting part 31241 from accidentally coming out of the first mating part 31233; similarly, the engagement of the second set screw 32263 with the second groove 32232 also enhances the locking effect between the second connecting part 32261 and the second mating part 32231.

[0040] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the first hanging wheel 312 includes a first connecting block 3121 fixedly connected to the first sleeve frame 3122. The first connecting block 3121 has a first slot 31211 for receiving one end of the first connecting rod 311, thereby achieving a fixed connection between the first connecting rod 311 and the first hanging wheel 312. The first connecting block 3121 also has a first through groove 31212 for receiving the first hook block 3123. The first hook block 3123 is slidably disposed in the first through groove 31212, allowing it to be mounted on the first sleeve frame. The guide 3122 moves up and down vertically; the third hanging wheel 322 includes a second connecting block 3221 fixedly connected to the second sleeve 3222. The second connecting block 3221 has a second slot 32211 for accommodating one end of the second connecting rod 321, so as to realize a stable connection between the second connecting rod 321 and the third hanging wheel 322. The second connecting block 3221 has a second through groove 32212 for accommodating the second hanging block 3223. The second hanging block 3223 is slidably disposed in the second through groove 32212, and cooperates with the second height adjustment mechanism to realize height adjustment.

[0041] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, a horizontal pulley 31213 is rotatably mounted on one end of the first connecting block 3121. The mutual displacement component 3 includes a first flexible cable 34 and a second flexible cable 35. One end of the first flexible cable 34 is fixedly connected to the fourth hanging wheel 323 of the second pulley assembly 32, and the other end of the first flexible cable 34 passes around the horizontal pulley 31213 of the first hanging wheel 312 and is fixedly connected to the fourth hanging wheel 323 of the third pulley assembly 33. One end of the second flexible cable 35 is fixedly connected to the third hanging wheel 322 of the second pulley assembly 32, and the other end of the first flexible cable 34 passes around the horizontal pulley 31213 of the second hanging wheel 313 and is fixedly connected to the third hanging wheel 322 of the third pulley assembly 33. By setting the horizontal pulley 31213 as a steering wheel, the first flexible cable 34 and the second flexible cable 35 can change the transmission direction, realizing flexible linkage between the pulley assemblies. The first flexible cable 34 connects the second pulley assembly 32 and the fourth hanging wheel 323 of the third pulley assembly 33, and winds around the horizontal pulley 31213 of the first hanging wheel 312. The second flexible cable 35 connects the second pulley assembly 32 and the third hanging wheel 322 of the third pulley assembly 33, and winds around the horizontal pulley 31213 of the second hanging wheel 313, forming a symmetrical and reliable transmission system. This design allows the movement of the middle door leaf to automatically drive the two side door leaves to move in opposite directions synchronously, without the need for an additional drive device. It features a simple structure, smooth operation, and low noise. The flexible cable transmission is responsive and easy to install and debug.

[0042] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the guide rail 11 is provided with a first guide groove 111, a second guide groove 112, and a third guide groove 113. The first pulley assembly 31 is housed in the first guide groove 111 and can slide along its length direction. The second pulley assembly 32 is housed in the second guide groove 112, and the third pulley assembly 33 is housed in the third guide groove 113, thereby realizing the independent arrangement of the three sets of pulley assemblies in the guide rail 11. A plurality of first pulleys 3125 are rotatably arranged on the first sleeve 3122. The first pulleys 3125 are used to roll and support and guide the first pulley assembly 31 in the first guide groove 111. A plurality of second pulleys 3224 are rotatably arranged on the second sleeve 3222. The second pulleys 3224 are used to roll and support and guide the second pulley assembly 32 in the second guide groove 112. By setting independent first guide grooves 111, second guide grooves 112, and third guide grooves 113 on the guide rail 11, the first pulley assembly 31, the second pulley assembly 32, and the third pulley assembly 33 are able to operate in separate grooves, avoiding motion interference and improving the coordination and reliability of the three-door mutual movement. The first pulley 3125 rolls in the first guide groove 111, converting sliding friction into rolling friction, significantly reducing the running resistance of the first pulley assembly 31, improving smoothness, and reducing wear; the rolling support of the second pulley 3224 in the second guide groove 112 also improves the running stability of the second pulley assembly 32.

[0043] Optionally, in some embodiments, the third roller 322 includes a third connecting block 3225, and a buffer assembly 324 is installed on one side of the third connecting block 3225. The buffer assembly 324 includes a housing 3241, and a plurality of third pulleys 3244 are rotatably disposed on the side wall of the housing 3241 for rolling guidance within the guide rail 11. A gas spring 3243 is slidably disposed within the housing 3241, and both ends of the gas spring 3243 are mounted thereon. A U-shaped sliding section is formed on the inner cavity side wall of the housing 3241. The gas spring 3243 has a groove 3242 and a hook 3245. The hook 3245 has a hinge hole 3246. Both ends of the gas spring 3243 are hinged to the hook 3245 through the hinge hole 3246. The inner cavity sidewall of the outer shell 3241 has a U-shaped sliding groove 3242. A guide block 3247 is slidably disposed in the U-shaped sliding groove 3242. The guide block 3247 is fixedly connected to the hook 3245. The top of the hook 3245 has a locking hole 3248, which is used to cooperate with a limiting member installed in the guide rail 11. The buffer assembly 324 is installed on one side of the third connecting block 3225 of the third hanging wheel 322. It is used to provide a buffer deceleration function when the sliding door 2 runs to the limit position of its travel to prevent hard impact. When the sliding door 2 is operating normally, the buffer assembly 324 moves synchronously with the third pulley assembly 33 within the guide rail 11. At this time, several third pulleys 3244, which are rotatably mounted on the side wall of the outer casing 3241, roll within the guide rail 11, providing support and guidance to ensure smooth operation of the assembly. When the sliding door 2 approaches its opening or closing limit position, the preset limiting member within the guide rail 11 contacts the side wall of the locking hole 3248 at the top of the hook 3245, applying a pushing force. Under this pushing force, the guide block 3247 of the hook 3245 moves out of the vertical section of the U-shaped slide groove 3242 and into the horizontal section. The hook 3245 flips upward, and the limiting member fully enters the locking hole 3248. Driven by the gas spring 3243, the hook 3245 slowly moves towards the middle section of the outer casing 3241, thereby achieving soft buffer deceleration. When the sliding door 2 is pulled in the opposite direction, the guide block 3247 moves from the horizontal section of the re-molded slide groove 3242 into the vertical section, and the locking hole 3248 disengages from the limiting member, completing the reset process.

[0044] Example 1:

[0045] This invention proposes a three-door sliding structure, including a door frame 1 and a sliding door 2. The door frame 1 includes a guide rail 11, and a sliding assembly 3 for linkage with the sliding door 2 is installed inside the guide rail 11. The sliding assembly 3 includes a first pulley assembly 31, a second pulley assembly 32, and a third pulley assembly 33. The third pulley assembly 33 has the same structure as the second pulley assembly 32. The first pulley assembly 31 includes a first connecting rod 311, and the two ends of the first connecting rod 311 are respectively connected to a first hanging wheel 312 and a second hanging wheel 313 with the same structure. The first hanging wheel 312 includes a first sleeve 3122 and a first L-shaped block 3124. A first hook block 3123 is slidably fitted inside the first sleeve 3122. The first sleeve 3122 is provided with a first height adjustment mechanism for adjusting the height of the first hook block 3123. The hook block 3123 is provided with a first docking part 31233, and the first L-shaped block 3124 is provided with a first connecting part 31241 that engages with the first docking part 31233. The second pulley assembly 32 includes a second connecting rod 321. The two ends of the second connecting rod 321 are respectively connected to a third hanging wheel 322 and a fourth hanging wheel 323 with the same structure. The third hanging wheel 322 includes a second sleeve 3222 and a second L-shaped block 3226. The second hook block 3223 is slidably fitted inside the second sleeve 3222. The second sleeve 3222 is provided with a second height adjustment mechanism for adjusting the height of the second hook block 3223. The second hook block 3223 is provided with a second docking part 32231, and the second L-shaped block 3226 is provided with a second connecting part 32261 that engages with the second docking part 32231. During installation, the first L-shaped block 3124 and the second L-shaped block 3226 are first pre-fixed onto the sliding door 2; then, the first pulley assembly 31, the second pulley assembly 32, and the third pulley assembly 33 are installed into the guide rail 11; next, by operating the first and second height adjustment mechanisms, the first hook block 3123 is driven to slide upward within the first frame 3122, so that the first docking part 31233 is in a high position, and at the same time, the second hook block 3223 is driven to slide upward within the second frame 3222, so that the second docking part 32231 is also in a high position, thereby forming an installation window on the first hanging wheel 312 and the third hanging wheel 322 for easy docking, and then the door with the first L-shaped block 3124 is installed. The sliding door 2 and the second L-shaped block 3226 are placed vertically, which further allows the first connecting part 31241 of the first L-shaped block 3124 and the second connecting part 32261 of the second L-shaped block 3226 to be smoothly inserted into the first docking part 31233 and the second docking part 32231 in the high position, respectively, to avoid the sliding door 2 from colliding with the door frame 1. After installation, the first height adjustment mechanism and the second height adjustment mechanism are adjusted in reverse to make the first hook block 3123 and the second hook block 3223 slide downward, driving the sliding door 2 to descend as a whole until the bottom of the sliding door 2 contacts the door frame 1 and is stably supported. When disassembling, the operation is reversed: first adjust the hook block to make the sliding door 2 detach from the door frame 1, and then the sliding door 2 can be removed.This design effectively solves the problems of difficult installation and disassembly, and easy scratching of the door frame 1, caused by the traditional three-door sliding door requiring tilting to hook onto the guide rail 11. The first connecting part 31241 and the first mating part 31233 are detachably connected via a snap-fit ​​structure. The first connecting part 31241 is designed as an outwardly protruding bump, and the first mating part 31233 is correspondingly designed as a concave receiving groove, the shape of which matches the shape of the bump. Similarly, the second connecting part 32261 and the second mating part 32231 are detachably connected via a snap-fit ​​structure. The second connecting part 32261 is designed as an outwardly protruding bump, and the second mating part 32231 is correspondingly designed as a concave receiving groove, the shape of which matches the shape of the bump. During installation, after the first hooking block 3123 is raised to its highest position via the first height adjustment mechanism, the sliding door 2 moves horizontally closer, causing the bump of the first connecting part 31241 to slide from the side into the receiving groove of the first mating part 31233, thus achieving hooking. Similarly, the second connecting part 32261 and the second docking part 32231 also adopt the same snap-fit ​​structure. By setting a snap-fit ​​lateral hook-fit structure between the first connecting part 31241 and the first docking part 31233, and between the second connecting part 32261 and the second docking part 32231, which involves a protrusion and a receiving groove, convenient assembly of the sliding door 2 and the hanging wheel assembly is achieved. This connection method does not require vertical alignment or tilting of the door body. Simply push the sliding door 2 horizontally along the guide rail 11 to complete the synchronous hook-fitting of the first connecting part 31241 and the first docking part 31233, and the second connecting part 32261 and the second docking part 32231, thus avoiding collision with the door frame 1.

[0046] The bottom of the first connecting block 3123 has a first groove 31234. The first L-shaped block 3124 has a first protrusion 31242. The first protrusion 31242 is fitted with a first set screw 31243. The first set screw 31243 and the first protrusion 31242 are connected by threads and partially extend into the first groove 31234. The inner wall curvature of the first groove 31234 is adapted to the outer peripheral arc surface of the first set screw 31243. The bottom of the second connecting block 3223 has a second groove 32232. The second L-shaped block 3226 has a second protrusion 32262. The second protrusion 32262 is fitted with a second set screw 32263. The second set screw 32263 and the second protrusion 32262 are connected by threads and partially extend into the second groove 32232. The inner wall curvature of the second groove 32232 is adapted to the outer peripheral arc surface of the second set screw 32263. After the first L-shaped block 3124 and the first hook block 3123 are engaged, the first set screw 31243 is rotated, causing its end to gradually embed into the first groove 31234 and fit tightly against its arc-shaped inner wall, thus locking the connection. Similarly, rotating the second set screw 32263 allows its end to extend into the interior of the second groove 32232, thereby enhancing the connection stability between the second connecting part 32261 and the second mating part 32231. After the first set screw 31243 is screwed in, it engages with the arc surface of the first groove 31234, effectively preventing the first connecting part 31241 from accidentally coming out of the first mating part 31233. Similarly, the engagement of the second set screw 32263 with the second groove 32232 also enhances the locking effect between the second connecting part 32261 and the second mating part 32231.

[0047] The first height adjustment mechanism includes a first threaded hole 31221 on one side of the first sleeve frame 3122, a first bolt 31232 disposed in the first threaded hole 31221, and the first bolt 31232 threadedly connected to the first threaded hole 31221. A first hook block 3123 has a first inclined surface 31231 on the side facing the first bolt 31232. The second height adjustment mechanism includes a second threaded hole 32221 on one side of the second sleeve frame 3222, a second bolt 32222 disposed in the second threaded hole 32221, and the second bolt 32222 threadedly connected to the second threaded hole 32221. A second hook block 3223 has a second inclined surface 32233 on the side facing the second bolt 32222. When the first bolt 31232 is rotated, its end abuts against the first inclined surface 31231, and the first hook block 3123 is pushed to slide upwards or downwards within the first sleeve frame 3122 using the inclined plane transmission principle, thereby adjusting the height of the first docking part 31233. Similarly, when the second bolt 32222 is rotated, its end acts on the second inclined surface 32233, driving the second hook block 3223 to slide along the second sleeve frame 3222, thereby adjusting the height of the second docking part 32231. Through the cooperation of the first bolt 31232 with the first inclined surface 31231 and the second bolt 32222 with the second inclined surface 32233, precise lifting control of the first hook block 3123 and the second hook block 3223 is achieved, facilitating the installation and disassembly of the sliding door 2. This structure is easy to adjust, responsive, and reliable in locking, and can be operated without additional tools, significantly improving the assembly efficiency and ease of use of the three-door sliding structure.

[0048] The first hanging wheel 312 includes a first connecting block 3121 fixedly connected to the first sleeve 3122. The first connecting block 3121 has a first slot 31211 for receiving one end of the first connecting rod 311, thereby achieving a fixed connection between the first connecting rod 311 and the first hanging wheel 312. The first connecting block 3121 also has a first through groove 31212 for receiving a first hook block 3123. The first hook block 3123 is slidably disposed in the first through groove 31212, allowing it to move vertically under the guidance of the first sleeve 3122. The direction moves up and down; the third hanging wheel 322 includes a second connecting block 3221 fixedly connected to the second sleeve 3222. The second connecting block 3221 has a second slot 32211 for accommodating one end of the second connecting rod 321, so as to realize a stable connection between the second connecting rod 321 and the third hanging wheel 322. The second connecting block 3221 has a second through groove 32212 for accommodating the second hook block 3223. The second hook block 3223 is slidably disposed in the second through groove 32212, and cooperates with the second height adjustment mechanism to realize height adjustment.

[0049] A horizontal pulley 31213 is rotatably mounted on one end of the first connecting block 3121. The mutual displacement assembly 3 includes a first flexible cable 34 and a second flexible cable 35. One end of the first flexible cable 34 is fixedly connected to the fourth hanging wheel 323 of the second pulley assembly 32, and the other end of the first flexible cable 34 passes around the horizontal pulley 31213 of the first hanging wheel 312 and is fixedly connected to the fourth hanging wheel 323 of the third pulley assembly 33. One end of the second flexible cable 35 is fixedly connected to the third hanging wheel 322 of the second pulley assembly 32, and the other end of the first flexible cable 34 passes around the horizontal pulley 31213 of the second hanging wheel 313 and is fixedly connected to the third hanging wheel 322 of the third pulley assembly 33. By setting the horizontal pulley 31213 as a steering wheel, the first flexible cable 34 and the second flexible cable 35 can change the transmission direction, realizing flexible linkage between the pulley assemblies. The first flexible cable 34 connects the second pulley assembly 32 and the fourth hanging wheel 323 of the third pulley assembly 33, and winds around the horizontal pulley 31213 of the first hanging wheel 312. The second flexible cable 35 connects the second pulley assembly 32 and the third hanging wheel 322 of the third pulley assembly 33, and winds around the horizontal pulley 31213 of the second hanging wheel 313, forming a symmetrical and reliable transmission system. This design allows the movement of the middle door leaf to automatically drive the two side door leaves to move in opposite directions synchronously, without the need for an additional drive device. It features a simple structure, smooth operation, and low noise. The flexible cable transmission is responsive and easy to install and debug.

[0050] The guide rail 11 has a first guide groove 111, a second guide groove 112, and a third guide groove 113. The first pulley assembly 31 is housed in the first guide groove 111 and can slide along its length. The second pulley assembly 32 is housed in the second guide groove 112, and the third pulley assembly 33 is housed in the third guide groove 113, thus realizing the independent arrangement of the three sets of pulley assemblies in the guide rail 11. Several first pulleys 3125 are rotatably arranged on the first frame 3122. The first pulleys 3125 are used to roll and support and guide the first pulley assembly 31 in the first guide groove 111. Several second pulleys 3224 are rotatably arranged on the second frame 3222. The second pulleys 3224 are used to roll and support and guide the second pulley assembly 32 in the second guide groove 112. By setting independent first guide grooves 111, second guide grooves 112, and third guide grooves 113 on the guide rail 11, the first pulley assembly 31, the second pulley assembly 32, and the third pulley assembly 33 are able to operate in separate grooves, avoiding motion interference and improving the coordination and reliability of the three-door mutual movement. The first pulley 3125 rolls in the first guide groove 111, converting sliding friction into rolling friction, significantly reducing the running resistance of the first pulley assembly 31, improving smoothness, and reducing wear; the rolling support of the second pulley 3224 in the second guide groove 112 also improves the running stability of the second pulley assembly 32.

[0051] Example 2:

[0052] The difference between this embodiment and Embodiment 1 is that the third roller 322 includes a third connecting block 3225. A buffer assembly 324 is installed on one side of the third connecting block 3225. The buffer assembly 324 includes a housing 3241. A plurality of third pulleys 3244 are rotatably arranged on the side wall of the housing 3241 for rolling guidance within the guide rail 11. A gas spring 3243 is slidably arranged inside the housing 3241. Both ends of the gas spring 3243 are installed. The inner cavity side wall of the housing 3241 has an opening. A U-shaped sliding groove 3242 and a hook 3245 are provided. The hook 3245 has a hinge hole 3246. The two ends of the gas spring 3243 are hinged to the hook 3245 through the hinge hole 3246. A U-shaped sliding groove 3242 is provided on the inner cavity side wall of the outer shell 3241. A guide block 3247 is slidably arranged in the U-shaped sliding groove 3242. The guide block 3247 is fixedly connected to the hook 3245. A locking hole 3248 is provided on the top of the hook 3245. The locking hole 3248 is used to cooperate with the limiting member installed in the guide rail 11. A buffer assembly 324 is installed on one side of the third connecting block 3225 of the third hanging wheel 322. It is used to provide a buffer deceleration function when the sliding door 2 runs to the limit position of the travel to prevent hard impact. When the sliding door 2 is operating normally, the buffer assembly 324 moves synchronously with the third pulley assembly 33 within the guide rail 11. At this time, several third pulleys 3244, which are rotatably mounted on the side wall of the outer casing 3241, roll within the guide rail 11, providing support and guidance to ensure smooth operation of the assembly. When the sliding door 2 approaches its opening or closing limit position, the preset limiting member within the guide rail 11 contacts the side wall of the locking hole 3248 at the top of the hook 3245, applying a pushing force. Under this pushing force, the guide block 3247 of the hook 3245 moves out of the vertical section of the U-shaped slide groove 3242 and into the horizontal section. The hook 3245 flips upward, and the limiting member fully enters the locking hole 3248. Driven by the gas spring 3243, the hook 3245 slowly moves towards the middle section of the outer casing 3241, thereby achieving soft buffer deceleration. When the sliding door 2 is pulled in the opposite direction, the guide block 3247 moves from the horizontal section of the re-molded slide groove 3242 into the vertical section, and the locking hole 3248 disengages from the limiting member, completing the reset process.

[0053] Specifically, the working principle of this invention is as follows:

[0054] During installation, the first L-shaped block 3124 and the second L-shaped block 3226 are first fixed to the sliding door 2; then the first pulley assembly 31, the second pulley assembly 32, and the third pulley assembly 33 are installed as a whole into the guide rail 11. By operating the first and second height adjustment mechanisms, i.e., rotating the first bolt 31232 and the second bolt 32222, their ends abut against the first inclined surface 31231 of the first hook block 3123 and the second inclined surface 32233 of the second hook block 3223. Using the inclined plane transmission principle, the first hook block 3123 is pushed to slide upward in the first through groove 31212 of the first frame 3122, and the second hook block 3223 slides upward in the second through groove 32212 of the second frame 3222, so that the first docking part 31233 and the second docking part 32231 are raised to the high position, forming a docking window. At this point, push the sliding door 2 horizontally along the guide rail 11, causing the protrusion of the first connecting part 31241 of the first L-shaped block 3124 to slide from the side into the receiving groove of the first docking part 31233. Simultaneously, the second connecting part 32261 of the second L-shaped block 3226 slides into the receiving groove of the second docking part 32231, completing the snap-fit ​​connection. After installation, rotate the first bolt 31232 and the second bolt 32222 in the opposite direction to lower the hook block, causing the sliding door 2 to sit on the door frame 1. For disassembly, operate in the reverse direction, first raise the hook block to detach the sliding door 2 from the door frame 1, and then it can be moved horizontally out.

[0055] When a user pushes a sliding door on one side, the side pulley assembly slides along the guide rail 11, transmitting movement through the linkage of the first flexible cable 34 and the second flexible cable 35. Specifically: one end of the first flexible cable 34 is fixed to the fourth hanging wheel 323 of the second pulley assembly 32, and the other end passes over the horizontal pulley 31213 on the first hanging wheel 312 of the first pulley assembly 31 and connects to the fourth hanging wheel 323 of the third pulley assembly 33; one end of the second flexible cable 35 is fixed to the third hanging wheel 322 of the second pulley assembly 32, and the other end passes over the horizontal pulley 31213 on the second hanging wheel 313 of the first pulley assembly 31 and connects to the third hanging wheel 322 of the third pulley assembly 33.

[0056] To enhance the reliability of the middle door connection, a first groove 31234 is provided at the bottom of the first mounting block 3123, and a first protrusion 31242 is provided on the first L-shaped block 31244. By rotating the first set screw 31243, its end extends into the first groove 31234 and fits against the arc-shaped inner wall to achieve anti-loosening locking. Similarly, the second set screw 32263 is screwed into the second groove 32232 to lock the second connecting part 32261 and the second mating part 32231.

[0057] In summary, this invention solves the problem that traditional three-door sliding door rollers need to be assembled with the door leaf and then tilted to hang on the guide rail, resulting in difficult installation and disassembly and inconvenient operation.

[0058] It should be understood that the terms "first," "second," etc., are used in this invention to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this invention, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information. In addition, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0059] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A three-door sliding structure, comprising a door frame (1) and sliding doors (2), wherein the door frame (1) includes a guide rail (11), and a sliding assembly (3) for linkage with the sliding doors (2) is installed within the guide rail (11), characterized in that, The mutual movement component (3) includes a first pulley assembly (31), a second pulley assembly (32), and a third pulley assembly (33). The third pulley assembly (33) has the same structure as the second pulley assembly (32). The first pulley assembly (31) includes a first connecting rod (311). The two ends of the first connecting rod (311) are respectively connected to a first hanging wheel (312) and a second hanging wheel (313) with the same structure. The first hanging wheel (312) includes a first sleeve (3122) and a first L-shaped block (3124). A first hook block (3123) is slidably fitted inside the first sleeve (3122). The first sleeve (3122) is provided with a first height adjustment mechanism for adjusting the height of the first hook block (3123). The first hook block (3123) is provided with a first docking part (31233). The first L-shaped block (3123) is provided with a first docking part (31233). 124) A first connecting part (31241) is provided to engage with the first docking part (31233). The second pulley assembly (32) includes a second connecting rod (321). The two ends of the second connecting rod (321) are respectively connected to a third hanging wheel (322) and a fourth hanging wheel (323) with the same structure. The third hanging wheel (322) includes a second sleeve frame (3222) and a second L-shaped block (3226). A second hook block (3223) is slidably sleeved in the second sleeve frame (3222). The second sleeve frame (3222) is provided with a second height adjustment mechanism for adjusting the height of the second hook block (3223). The second hook block (3223) is provided with a second docking part (32231). The second L-shaped block (3226) is provided with a second connecting part (32261) that engages with the second docking part (32231).

2. The three-gate mutual shift structure according to claim 1, characterized in that, The first connecting part (31241) and the first docking part (31233) are detachably connected by a snap-fit ​​structure. The first connecting part (31241) is configured as an outward protruding bump structure, and the first docking part (31233) is configured as a concave receiving groove structure. The shape of the receiving groove is adapted to the shape of the protrusion.

3. The three-gate mutual shift structure according to claim 1, characterized in that, The second connecting part (32261) and the second docking part (32231) are detachably connected by a snap-fit ​​structure. The second connecting part (32261) is a protruding protrusion structure, and the second docking part (32231) is a correspondingly recessed receiving groove structure. The shape of the receiving groove is adapted to the shape of the protrusion.

4. A three-gate mutual shift structure according to claim 1, characterized in that, The first height adjustment mechanism includes a first threaded hole (31221) opened on one side of the first sleeve frame (3122), a first bolt (31232) is provided in the first threaded hole (31221), the first bolt (31232) is threadedly connected to the first threaded hole (31221), and the first hook block (3123) has a first inclined surface (31231) on the side facing the first bolt (31232).

5. A three-gate mutual shift structure according to claim 1, characterized in that, The second height adjustment mechanism includes a second threaded hole (32221) opened on one side of the second sleeve frame (3222), a second bolt (32222) is provided in the second threaded hole (32221), the second bolt (32222) is threadedly connected to the second threaded hole (32221), and the second hook block (3223) has a second inclined surface (32233) on the side facing the second bolt (32222).

6. A three-gate mutual shift structure according to claim 1, characterized in that, The bottom of the first hook block (3123) is provided with a first groove (31234), the first L-shaped block (3124) is provided with a first protrusion (31242), the first protrusion (31242) is provided with a first set screw (31243), the first set screw (31243) and the first protrusion (31242) are connected by threads and partially extend into the first groove (31234), and the inner wall curvature of the first groove (31234) is adapted to the outer peripheral arc surface of the first set screw (31243); The second hook block (3223) has a second groove (32232) at its bottom. The second L-shaped block (3226) has a second protrusion (32262). The second protrusion (32262) is fitted with a second set screw (32263). The second set screw (32263) and the second protrusion (32262) are connected by threads and partially extend into the second groove (32232). The inner wall curvature of the second groove (32232) is adapted to the outer peripheral arc surface of the second set screw (32263).

7. A three-gate mutual shift structure according to claim 1, characterized in that, The first roller (312) includes a first connecting block (3121) fixedly connected to the first sleeve (3122). The first connecting block (3121) has a first slot (31211) for accommodating one end of the first connecting rod (311) and a first through groove (31212) for accommodating the first hook block (3123). The third roller (322) includes a second connecting block (3221) fixedly connected to the second sleeve (3222). The second connecting block (3221) has a second slot (32211) for accommodating one end of the second connecting rod (321) and a second through groove (32212) for accommodating the second hook block (3223).

8. A three-gate mutual shift structure according to claim 7, characterized in that, A horizontal pulley (31213) is rotatably mounted on one end of the first connecting block (3121). The mutual shifting component (3) includes a first flexible cable (34) and a second flexible cable (35). One end of the first flexible cable (34) is fixedly connected to the fourth hanging wheel (323) of the second pulley assembly (32), and the other end of the first flexible cable (34) passes around the horizontal pulley (31213) of the first hanging wheel (312) and is fixedly connected to the fourth hanging wheel (323) of the third pulley assembly (33). One end of the second flexible cable (35) is fixedly connected to the third hanging wheel (322) of the second pulley assembly (32), and the other end of the first flexible cable (34) passes around the horizontal pulley (31213) of the second hanging wheel (313) and is fixedly connected to the third hanging wheel (322) of the third pulley assembly (33).

9. A three-gate mutual shift structure according to claim 1, characterized in that, The guide rail (11) has a first guide groove (111), a second guide groove (112), and a third guide groove (113). The first pulley assembly (31) is housed in the first guide groove (111) and can slide along its length. The second pulley assembly (32) is housed in the second guide groove (112), and the third pulley assembly (33) is housed in the third guide groove (113). A plurality of first pulleys (3125) are rotatably arranged on the first sleeve frame (3122). The first pulleys (3125) are used to roll and support and guide the first pulley assembly (31) in the first guide groove (111). A plurality of second pulleys (3224) are rotatably arranged on the second sleeve frame (3222). The second pulleys (3224) are used to roll and support and guide the second pulley assembly (32) in the second guide groove (112).

10. A three-gate mutual shift structure according to claim 1, characterized in that, The third pulley (322) includes a third connecting block (3225). A buffer assembly (324) is installed on one side of the third connecting block (3225). The buffer assembly (324) includes a housing (3241). A plurality of third pulleys (3244) are rotatably arranged on the side wall of the housing (3241). A gas spring (3243) is slidably arranged inside the housing (3241). Both ends of the gas spring (3243) are equipped with hooks (3245) in U-shaped grooves (3242). The hook (3245) is provided with a hinge hole (3246). The two ends of the gas spring (3243) are hinged to the hook (3245) through the hinge hole (3246). The inner cavity sidewall of the outer shell (3241) is provided with a U-shaped slide groove (3242). A guide block (3247) is slidably arranged in the U-shaped slide groove (3242). The guide block (3247) is fixedly connected to the hook (3245). The top of the hook (3245) is provided with a locking hole (3248). The locking hole (3248) is used to cooperate with the limiting member installed in the guide rail (11).

Images