Sliding door with bottom pulley structure

Abstract

The utility model relates to the technical field of bathroom doors, in particular to a sliding door with a bottom pulley structure, which comprises a first mounting plate, a pulley component and an anti-jumping block. The pulley assembly comprises a connecting piece, a wheel bearing and a roller; the first mounting plate is connected with the front end face of the movable door; the connecting piece extends from the lower portion of the movable door to the lower door frame, and the rolling wheel is slidably connected with the sliding groove part in the movable space. The anti-jumping block comprises a mounting part and an anti-jumping part; the mounting part is positioned on the lower side of the movable door and the front side of the lower door frame; the end, away from the mounting part, of the anti-jumping part is located in the moving space. According to the sliding door with the bottom pulley structure, after the movable door and the lower door frame are assembled, the anti-bouncing block can be installed by utilizing the distance between the movable door and the sliding groove part in the height direction, and the problems that in the prior art, the anti-bouncing block is assembled on the bottom pulley structure in advance, so that when the movable door is installed, the anti-bouncing block is prone to colliding with the upper door frame, and the anti-bouncing block is damaged are solved. Therefore, the mounting difficulty of the movable door is increased, and the mounting efficiency is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bathroom doors, in particular to a sliding door with a bottom pulley structure. Background Art

[0002] When using existing sliding doors with bottom pulleys, the bottom pulleys are prone to jumping due to factors such as the uneven surface of the chute of the lower door frame, the excessive weight of the sliding door, and the excessive gap between the bottom pulley and the upper edge of the chute. This can cause the sliding door to move unsmoothly or even fall off the slide rail. Currently, anti-jump blocks are commonly used to address this issue. However, the existing bottom pulleys and anti-jump blocks need to be pre-assembled, and then the assembled bottom pulleys must be installed on the sliding door before the sliding door is installed on the chute. Because the anti-jump block needs to perform an anti-jump function, the height of the plane on which the upper end surface of the anti-jump block lies is generally higher than the position of the bottom pulley and relatively close to the upper edge of the chute. When installing the sliding door, the bottom pulley needs to be raised before being placed into the chute. At this point, the anti-jump block is likely to collide with the upper edge of the chute, which increases the difficulty of installing the sliding door and the chute and reduces installation efficiency. Utility Model Content

[0003] The main purpose of the utility model is to provide a sliding door with a bottom pulley structure, which can be used to install anti-jump blocks after the sliding door and the lower door frame are assembled, using the distance between the sliding door and the slide groove part in the height direction, to solve the problem in the prior art that the anti-jump blocks are pre-assembled on the bottom pulley structure, which will cause the anti-jump blocks to easily collide with the upper door frame when installing the sliding door, thereby increasing the difficulty of installing the sliding door and reducing the installation efficiency.

[0004] The cam is secured to the upper and lower ends of the door frame and is adapted to engage the lower ends of the door frame and to engage the lower ends of the door frame when the door frame is in a closed position. The cam is fixedly connected to the sliding door, and the other end of the connecting member is extended from the bottom of the sliding door toward the lower door frame, the inner ring of the wheel bearing is fixedly connected to the end of the connecting member away from the first mounting plate, the outer ring of the wheel bearing is fixedly connected to the roller, and the roller is slidably connected to the slide groove portion in the moving space; the anti-jump block includes a mounting portion and an anti-jump portion, the mounting portion is detachably connected to the connecting member, the mounting portion is located at the lower side of the sliding door, and the mounting portion is located at the front side of the lower door frame; one end of the anti-jump portion is fixedly connected to the upper end surface of the mounting portion, and the other end of the anti-jump portion is protruded in the direction of the moving space, the end of the anti-jump portion away from the mounting portion is located in the moving space, and the horizontal plane height of the upper end surface of the anti-jump portion is higher than the horizontal plane height of the upper end point of the roller.

[0005] Optionally, a first avoidance space for avoiding the movable door is formed between the anti-jump portion and the mounting portion; and an arc-shaped opening matching the roller is provided on the side end surface of the anti-jump portion facing the roller.

[0006] Optionally, the pulley assembly also includes a plug-in block, and the anti-jump block also includes a first fixing bolt, one end of the plug-in block is fixedly connected to the connecting piece, and the other end of the plug-in block is horizontally extended along the length direction of the lower door frame toward the direction of the mounting portion, and the plug-in block is located on the lower side of the movable door, and the plug-in block is located on the front side of the lower door frame; the mounting portion is provided with a slot that cooperates with the plug-in block on the end face facing the plug-in block, and the front end face of the mounting portion is provided with a first through hole that penetrates through it, and the first through hole is connected to the slot; the front end face of the plug-in block is provided with a second through hole that cooperates with the first through hole, and the first fixing bolt passes through the first through hole and the second through hole in sequence to fix the mounting portion and the plug-in block.

[0007] Optionally, the connecting member includes a first connecting portion and a second connecting portion, one end of the first connecting portion is fixedly connected to the front end surface of the first mounting plate, and the other end of the first connecting portion extends downward to the bottom of the movable door; one end of the second connecting portion is fixedly connected to the end of the first connecting portion away from the first mounting plate, and the other end of the second connecting portion extends horizontally toward the lower door frame; the roller is provided at an end of the second connecting portion away from the first connecting portion; and the plug-in block is fixedly connected to the second connecting portion.

[0008] Optionally, the bottom pulley structure also includes a second mounting plate, one end of the second mounting plate is detachably connected to the front end surface of the first mounting plate, and the other end of the second mounting plate extends downward to the lower end of the first mounting plate; the number of the pulley assemblies is two groups, and the number of the anti-jump blocks is two, and the two groups of the pulley assemblies are arranged in a one-to-one correspondence with the two anti-jump blocks; the two groups of the pulley assemblies are symmetrically arranged at both ends of the second mounting plate along its own length direction, and the first connecting part is fixedly connected to the end surface of the second mounting plate facing the movable door, the first connecting part is located below the first mounting plate, and a second avoidance space for avoiding the first mounting plate is formed between the second mounting plate and the first connecting part.

[0009] 18. The repairing kit for automotive dents, according to claim 1, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a first, a second, and a second helm. The bosses comprise a through-hole, wherein the bosses comprise a first end, a second end, and a second helm. The bosses comprise a first end, a second end, and a second helm. The bosses comprise a first end, a second end, and a second helm.

[0010] Optionally, the bottom pulley structure also includes a third mounting plate, a mounting post and a second fixing bolt, the third mounting plate being arranged on the rear end face of the movable door, and the position of the third mounting plate is arranged corresponding to the position of the first mounting plate, the mounting post being fixedly connected to the end face of the third mounting plate facing the movable door; corresponding first connecting through holes are respectively provided on the opposite end faces of the first mounting plate and the mounting post, a penetrating second connecting through hole is provided on the front end face of the movable door, the outer peripheral wall of the mounting post abuts against the inner peripheral wall of the second connecting through hole, and the second connecting through hole is connected to the first connecting through hole, and the second fixing bolt passes through the first connecting through hole and the second connecting through hole in sequence to fix the second mounting plate, the movable door and the third mounting plate.

[0011] Optionally, the bottom pulley structure also includes a mounting seat, which is arranged between the first mounting plate and the movable door, the rear end face of the mounting seat is detachably connected to the movable door, and the front end face of the mounting seat is detachably connected to the first mounting plate; the mounting seat includes a bottom plate and two first side panels, the bottom plate is detachably connected to the movable door, and the left and right ends of the bottom plate are respectively connected to two first side panels, and the two first side panels are respectively perpendicular to the bottom plate; a first accommodating space for accommodating the first mounting plate is formed between the bottom plate and the two first side panels; the rear end face of the first mounting plate abuts against the front end face of the bottom plate, and the left and right end faces of the first mounting plate abut against the opposite end faces of the two first side panels respectively.

[0012] Optionally, the bottom pulley structure also includes a dust cover, the interior of the dust cover is provided with a second accommodating space for accommodating the mounting seat and the first mounting plate, and the rear end face and the lower end face of the dust cover are both open; the end faces of the two first side plates facing away from each other are respectively provided with guide grooves, and the inner side walls at the left and right ends of the dust cover are respectively fixed with sliding bars that cooperate with the guide grooves, and the sliding bars are slidably connected to the guide grooves.

[0013] Optionally, the sliding door with a bottom pulley structure also includes a fixed door, the lower end surface of the upper door frame is provided with an upper slide groove and a first mounting groove, the upper slide groove is located at the front end of the first mounting groove, the upper end surface of the lower door frame is provided with a second mounting groove, and the second mounting groove is located at the rear end of the upper edge; the fixed door is located at the end of the upper door frame along its own length direction, and the upper end of the fixed door is fixedly set in the first mounting groove, and the lower end of the fixed door is fixedly set in the second mounting groove; the upper end of the movable door is slidably connected to the upper slide groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The door lock assembly of claim 1, wherein the locking cam is secured to the door frame by the locking cam and the hinged locking cam, wherein the locking cam is secured to the door frame by the hinged cam.

[0016] 2. By setting the anti-jump block, the up and down jumping of the roller can be limited, thereby solving the problem that the sliding door is not pushed and pulled smoothly or even easily falls off the slide rail due to the up and down jumping of the roller.

[0017] 3. The first mounting plate and the roller are respectively located on the front and rear sides of the movable door, and the roller is not connected to the rear end face of the movable door, which can reduce the distance between the movable door and the roller in the front-to-back direction, thereby reducing the gap distance between the movable door and the lower door frame.

[0018] 4. By setting the mounting seat, when installing the bottom pulley structure, first assemble the first mounting plate and the pulley assembly, and then push the first mounting plate from bottom to top into the first accommodating space, which can play a role in positioning and limiting the first mounting plate, making installation convenient.

[0019] 5. By setting two groups of the pulley assemblies and the two anti-jump blocks, and forming a second avoidance space between the first connecting portion of the connecting member and the second mounting plate for avoiding the first mounting plate, the overall stability of the bottom pulley structure is good and the structure is compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front view of a sliding door with a bottom pulley structure according to an embodiment of the present invention;

[0021] Figure 2 This is a partial structural diagram of a sliding door with a bottom pulley structure according to an embodiment of the present invention;

[0022] Figure 3 for Figure 2 A magnified schematic diagram of point A in the middle;

[0023] Figure 4 This is a left view of the partial structure of a sliding door with a bottom pulley structure according to an embodiment of the present invention.

[0024] Figure 5 This is a partial structural diagram of a bottom pulley structure of a sliding door with a bottom pulley structure according to an embodiment of the present invention;

[0025] Figure 6 This is a structural schematic diagram of an anti-jump block for a sliding door with a bottom pulley structure according to an embodiment of the present invention;

[0026] Figure 7 This is a three-dimensional structural cross-sectional view of an eccentric cam, a second mounting plate, and a first mounting plate of a sliding door with a bottom pulley structure according to an embodiment of the present invention;

[0027] Figure 8 This is a structural schematic diagram of an eccentric cam of a sliding door with a bottom pulley structure according to an embodiment of the present invention;

[0028] Figure 9 This is a structural schematic diagram of a mounting base for a sliding door with a bottom pulley structure according to an embodiment of the present invention;

[0029] Figure 10 This is a schematic structural diagram of a dust cover for a sliding door with a bottom pulley structure according to an embodiment of the present invention;

[0030] Figure 11 This is a structural schematic diagram of an upper door frame of a sliding door with a bottom pulley structure according to an embodiment of the present invention.

[0031] Description of the accompanying drawings: upper door frame 1, upper slide groove 11, first mounting groove 12, lower door frame 2, lower slide groove 21, upper edge portion 211, slide groove portion 212, moving space 213, second mounting groove 22, movable door 3, bottom pulley structure 4, first mounting plate 41, boss 411, fourth mounting through hole 412, first connecting through hole 413, pulley assembly 42, connecting piece 421, first connecting portion 4211, second connecting portion 4212, roller 422, plug-in block 423, second through hole 4231, anti-jump block 43, mounting portion 431, slot 4311, first A through hole 4312, an anti-jump portion 432, an arc-shaped opening 4321, a first avoidance space 433, a second mounting plate 44, a second avoidance space 441, a third mounting through hole 442, a cam 45, a first circular portion 451, a first mounting through hole 4511, a second circular portion 452, a second mounting through hole 4521, a third mounting plate 46, a mounting column 47, a mounting seat 48, a bottom plate 481, a first side plate 482, a guide groove 4821, a first accommodating space 483, a dust cover 49, a second accommodating space 491, a sliding bar 492, a fixed door 5, and a side door frame 6. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, fixed connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0035] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or solutions that meet both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0036] To solve the above technical problems, please refer to Figures 1 to 4The present invention proposes a sliding door with a bottom pulley structure, comprising an upper door frame 1, a lower door frame 2, a movable door 3 and a bottom pulley structure 4, wherein the upper door frame 1 and the lower door frame 2 are respectively arranged at the upper and lower ends of the movable door 3, the upper end of the movable door 3 is slidably connected to the upper door frame 1, and the lower door frame 2 is provided with a sliding groove 21 along the front side surface of its own length direction, the sliding groove 21 comprises an upper edge portion 211 and a sliding groove portion 212 opening upward, the upper edge portion 211 is located directly above the sliding groove portion 212, and a moving space 213 for the bottom pulley structure 4 to move is formed between the upper edge portion 211 and the sliding groove portion 212;

[0037] The lower end of the movable door 3 is connected to the bottom pulley structure 4 at both ends along its length direction; the bottom pulley structure 4 includes a first mounting plate 41, a pulley assembly 42 and an anti-jump block 43; the pulley assembly 42 includes a connecting piece 421, a wheel bearing and a roller 422;

[0038] The first mounting plate 41 is detachably connected to the front end surface of the movable door 3; one end of the connecting member 421 is fixedly connected to the first mounting plate 41, and the other end of the connecting member 421 extends from the bottom of the movable door 3 toward the lower door frame 2. The inner ring of the wheel bearing is fixedly connected to the end of the connecting member 421 away from the first mounting plate 41, and the outer ring of the wheel bearing is fixedly connected to the roller 422. The roller 422 is slidably connected to the slide groove portion 212 in the movable space 213.

[0039] The anti-jump block 43 includes a mounting portion 431 and an anti-jump portion 432, the mounting portion 431 is detachably connected to the connecting member 421, the mounting portion 431 is located on the lower side of the movable door 3, and the mounting portion 431 is located on the front side of the lower door frame 2; one end of the anti-jump portion 432 is fixedly connected to the upper end face of the mounting portion 431, and the other end of the anti-jump portion 432 is protruding toward the direction of the moving space 213, and the end of the anti-jump portion 432 away from the mounting portion 431 is located in the moving space 213, and the horizontal plane height of the upper end face of the anti-jump portion 432 is higher than the horizontal plane height of the upper end point of the roller 422.

[0040] When installing the sliding door with a bottom pulley structure of the present invention, first assemble the first mounting plate 41 of the bottom pulley structure 4 and the pulley assembly 42, and then connect the first mounting plate 41 to the movable door 3. When installing the movable door 3 to the lower slide groove 21, it is necessary to lift the movable door 3 so that the bottom pulley structure 4 is also lifted synchronously, so that the roller 422 can smoothly enter the moving space 213, and then lower the movable door 3 so that the roller 422 can enter the slide groove part 212, and finally install the anti-jump block 43 on the connecting piece 421 of the pulley assembly 42.

[0041] By providing the mounting portion 431 and the connecting member 421 with a detachable connection, and providing the mounting portion 431 on the lower side of the movable door 3 and the front side of the lower door frame 2, the anti-jump portion 432 is provided on the mounting portion 431 in a direction protruding toward the moving space 213, and the end of the anti-jump portion 432 away from the mounting portion 431 is located in the moving space 213. When the mounting portion 431 and the connecting member 421 are installed, the distance in the height direction between the movable door 3 and the slide groove portion 212 (see FIG. Figure 3 ), first insert the anti-jump part 432 of the anti-jump block 43 into the moving space 213, then move the anti-jump block 43 in the horizontal direction toward the direction of the connecting member 421, and finally connect the installation part 431 with the connecting member 421, so as to solve the problem that the upper end face of the anti-jump block 43 is close to the lower end face of the upper edge 211, and the anti-jump block 43 is easy to collide with the upper edge 211 when installing the moving door 3, thereby increasing the difficulty of installing the moving door 3 and reducing the installation efficiency.

[0042] The anti-jump block 43 includes the mounting portion 431 and the anti-jump portion 432. The anti-jump portion 432 is protruding from the mounting portion 431 toward the moving space 213, and one end of the anti-jump portion 432 away from the mounting portion 431 is located within the moving space 213. The horizontal plane height of the upper end surface of the anti-jump portion 432 is higher than the horizontal plane height of the upper end point of the roller 422. The anti-jump portion 432 can limit the up and down movement of the roller 422. Figure 4 , further explained, the vertical distance between the upper end surface of the anti-jump portion 432 and the lower end surface of the upper edge portion 211 is smaller than the groove core depth of the chute portion 212, thereby solving the problem that the roller 422 easily falls off the chute portion 212. Specifically, it should be noted that the wheel bearing is not shown in the figure, and the wheel bearing mainly serves to support the roller 422.

[0043] By setting the connecting member 421, the first mounting plate 41 and the roller 422 are respectively located at the front and rear sides of the movable door 3. Figure 4 That is, the roller 422 is arranged to protrude toward the rear side of the movable door 3. When the movable door 3 is installed, the roller 422 can be easily installed in the slide groove portion 212. In addition, since the roller 422 is not connected to the rear end surface of the movable door 3, the distance between the movable door 3 and the roller 422 in the front-to-back direction can be reduced, thereby reducing the gap distance between the movable door 3 and the lower door frame 2.

[0044] See also Figures 4 to 6 , further explained, a first avoidance space 433 for avoiding the movable door 3 is formed between the anti-jump portion 432 and the mounting portion 431; the side end surface of the anti-jump portion 432 facing the roller 422 is provided with an arc-shaped opening 4321 matching the roller 422.

[0045] By providing the first avoidance space 433 and the arc-shaped opening 4321, the anti-jump portion 432 can be closer to the roller 422 in the left-right direction, thereby making the structure between the pulley assembly 42 and the anti-jump block 43 more compact. Furthermore, in the front-to-back direction, the front end surface of the anti-jump portion 432 is positioned between the movable door 3 and the lower door frame 2, so that the anti-jump portion 432 can prevent the movable door 3 from directly colliding with the lower door frame 2.

[0046] See also Figures 3 to 6 , further explained, the pulley assembly 42 also includes a plug-in block 423, the anti-jump block 43 also includes a first fixing bolt, one end of the plug-in block 423 is fixedly connected to the connecting member 421, and the other end of the plug-in block 423 is horizontally extended along the length direction of the lower door frame 2 toward the direction of the mounting portion 431, the plug-in block 423 is located on the lower side of the movable door 3, and the plug-in block 423 is located on the front side of the lower door frame 2;

[0047] See also Figure 6 The mounting portion 431 is provided with a slot 4311 that cooperates with the plug-in block 423 on the end face facing the plug-in block 423, and the front face of the mounting portion 431 is provided with a first through hole 4312 that penetrates through it, and the first through hole 4312 is communicated with the slot 4311; the front face of the plug-in block 423 is provided with a second through hole 4231 that cooperates with the first through hole 4312, and the first fixing bolt passes through the first through hole 4312 and the second through hole 4231 in sequence to fix the mounting portion 431 and the plug-in block 423.

[0048] By setting the plug-in block 423, the mounting portion 431 is provided with a slot 4311 which is matched with the plug-in block 423 towards the end surface of the plug-in block 423, so that when installing the anti-jump block 43, please refer to Figure 3 and Figure 4 , the anti-jump portion 432 can be first inserted into the moving space 213, and the anti-jump block 43 can be moved horizontally toward the direction of the connecting piece 421, and the anti-jump block 43 can be moved until the plug-in block 423 is inserted into the slot 4311. After aligning the first through hole 4312 with the second through hole 4231, the anti-jump block 43 and the plug-in block 423 are connected by fixing bolts, so that the anti-jump block 43 can be installed after the installation of the moving door 3 is completed, avoiding the problem that the anti-jump block 43 easily collides with the upper edge portion 211 when installing the moving door 3, which increases the difficulty of installation. At the same time, the installation process of the anti-jump block 43 is convenient and fast, effectively improving the efficiency of installation. Specifically, it should be noted that the first fixing bolt is not shown in the figure.

[0049] See also Figures 3 to 5 , further stating that the connecting member 421 includes a first connecting portion 4211 and a second connecting portion 4212, one end of the first connecting portion 4211 is fixedly connected to the front end surface of the first mounting plate 41, and the other end of the first connecting portion 4211 extends downward to the bottom of the movable door 3; one end of the second connecting portion 4212 is fixedly connected to the end of the first connecting portion 4211 away from the first mounting plate 41, and the other end of the second connecting portion 4212 is horizontally extended toward the direction of the lower door frame 2; the roller 422 is arranged at an end of the second connecting portion 4212 away from the first connecting portion 4211; the plug-in block 423 is fixedly connected to the second connecting portion 4212.

[0050] Since the first mounting plate 41 is connected to the front end surface of the movable door 3, by setting the first connecting portion 4211 and the second connecting portion 4212, the first mounting plate 41 and the roller 422 are respectively located on the front and rear sides of the movable door 3, that is, the roller 422 is protruding toward the rear side of the movable door 3. When the movable door 3 is installed, the roller 422 can be easily installed in the slide groove portion 212. In addition, since the roller 422 is not connected to the rear end surface of the movable door 3, the distance between the movable door 3 and the roller 422 in the front-to-back direction can be reduced, thereby reducing the gap distance between the movable door 3 and the lower door frame 2.

[0051] To further illustrate, the first connection portion 4211 and the second connection portion 4212 are an integrally formed structure, thereby improving the stability of the overall structure.

[0052] See also Figures 2 to 4 , further explained, the bottom pulley structure 4 also includes a second mounting plate 44, one end of the second mounting plate 44 is detachably connected to the front end surface of the first mounting plate 41, and the other end of the second mounting plate 44 extends downward to the lower end of the first mounting plate 41; the number of the pulley assemblies 42 is two groups, the number of the anti-jump blocks 43 is two, and the two groups of the pulley assemblies 42 are corresponding to the two anti-jump blocks 43;

[0053] The two groups of pulley assemblies 42 are symmetrically arranged at both ends of the second mounting plate 44 along its own length direction, and the first connecting portion 4211 is fixedly connected to the end face of the second mounting plate 44 facing the movable door 3. The first connecting portion 4211 is located below the first mounting plate 41, and a second avoidance space 441 for avoiding the first mounting plate 41 is formed between the second mounting plate 44 and the first connecting portion 4211.

[0054] By providing two sets of pulley assemblies 42, and symmetrically arranged at both ends of the second mounting plate 44 along its own length direction, and the two anti-jump blocks 43 being symmetrically arranged one-to-one with the two sets of pulley assemblies 42, the overall structural stability and supporting strength of the bottom pulley structure 4 can be improved. By providing the second avoidance space 441, the overall bottom pulley structure can be made more compact.

[0055] See also Figures 7 and 8 , further explained, the bottom pulley structure 4 also includes a cam 45, the cam 45 is connected to the front end surface of the second mounting plate 44, the cam 45 includes a first circular portion 451 and a second circular portion 452, one end of the second circular portion 452 is fixedly connected to the first circular portion 451, and the other end of the second circular portion 452 is arranged to protrude from the first circular portion 451 toward the direction of the second mounting plate 44, and a first mounting through-hole 4511 is formed through the front end surface of the first circular portion 451, and a second mounting through-hole 4521 corresponding to the first mounting through-hole 4511 is formed in the second circular portion 452, and the second mounting through-hole 4521 is connected to the first mounting through-hole 4511, and the diameter of the second mounting through-hole 4521 is larger than that of the first mounting through-hole 4511;

[0056] A third mounting hole 442 is defined on the front end of the second mounting plate 44 , and the second circular portion 452 is located in the third mounting hole 442 .

[0057] A boss 411 is provided on the end face of the first mounting plate 41 facing the second mounting plate 44. The boss 411 is located in the second mounting through hole 4521, and the outer peripheral wall of the boss 411 abuts against the inner peripheral wall of the second through hole 4231. The end face of the boss 411 facing the first circular portion 451 is provided with a fourth mounting through hole 412 corresponding to the first mounting through hole 4511.

[0058] See also Figures 7 and 8 Specifically, a fastener (such as a bolt) can be passed through the first mounting hole 4511, the second mounting hole 4521, and the fourth mounting hole 412 to achieve a stable connection between the cam 45 and the first mounting plate 41 and the second mounting plate 44.

[0059] See also Figures 4 and 5 , further explained, the bottom pulley structure 4 also includes a third mounting plate 46, a mounting column 47 and a second fixing bolt, the third mounting plate 46 is arranged on the rear end surface of the movable door 3, and the position of the third mounting plate 46 is corresponding to the position of the first mounting plate 41, and the mounting column 47 is fixedly connected to the end surface of the third mounting plate 46 facing the movable door 3;

[0060] Corresponding first connecting holes 413 are respectively provided on the opposite end faces of the first mounting plate 41 and the mounting column 47, and a second connecting hole is provided on the front end face of the movable door 3. The outer peripheral wall of the mounting column 47 abuts against the inner peripheral wall of the second connecting hole, and the second connecting hole is connected to the first connecting hole 413. The second fixing bolt passes through the first connecting hole 413 and the second connecting hole in sequence to fix the second mounting plate 44, the movable door 3 and the third mounting plate 46.

[0061] By arranging the third mounting plate 46 and the mounting column 47, and the third mounting plate 46 being arranged on the rear end face of the movable door 3, the outer peripheral wall of the mounting column 47 abuts against the inner peripheral wall of the second connecting through hole (not shown in the figure) opened on the movable door 3, which is beneficial to improving the connection stability between the bottom pulley structure 4 and the movable door 3.

[0062] See also Figure 5 , further explaining, there are multiple mounting columns 47, and correspondingly, there are also multiple first connecting through holes 413, the number of the second connecting through holes corresponds to the number of the first connecting through holes 413, and the number of the second fixing bolts (not shown in the figure) corresponds to the number of the mounting columns 47, which helps to improve the connection stability between the bottom pulley structure 4 and the movable door 3.

[0063] See also Figure 5 and Figure 9 , further explained, the bottom pulley structure 4 also includes a mounting seat 48, the mounting seat 48 is arranged between the first mounting plate 41 and the movable door 3, the rear end surface of the mounting seat 48 is detachably connected to the movable door 3, and the front end surface of the mounting seat 48 is detachably connected to the first mounting plate 41;

[0064] The mounting seat 48 includes a base plate 481 and two first side plates 482. The base plate 481 is detachably connected to the movable door 3. The left and right ends of the base plate 481 are respectively connected to the two first side plates 482, and the two first side plates 482 are respectively perpendicular to the base plate 481; a first accommodating space 483 for accommodating the first mounting plate 41 is formed between the base plate 481 and the two first side plates 482; the rear end face of the first mounting plate 41 is in contact with the front end face of the base plate 481, and the left and right end faces of the first mounting plate 41 are respectively in contact with the opposite end faces of the two first side plates 482.

[0065] See also Figure 9 Specifically, a third connecting through hole corresponding to the first connecting through hole 413 is opened on the bottom plate 481.

[0066] By setting the mounting seat 48, the mounting seat 48 includes a bottom plate 481 and two first side plates 482, and the rear end face of the first mounting plate 41 abuts against the front end face of the bottom plate 481, and the left and right end faces of the first mounting plate 41 abut against the opposite end faces of the two first side plates 482 respectively. When installing the bottom pulley structure 4, first assemble the first mounting plate 41 and the pulley assembly 42, and then push the first mounting plate 41 from bottom to top into the first accommodating space 483, and it can play a role in positioning and limiting the first mounting plate 41, and is easy to install.

[0067] See also Figure 1 and Figure 10 , further explained, the bottom pulley structure 4 also includes a dust cover 49, the interior of the dust cover 49 is provided with a second accommodating space 491 for accommodating the mounting seat 48 and the first mounting plate 41, and the rear end surface and the lower end surface of the dust cover 49 are both open;

[0068] See also Figure 9 The two end surfaces of the first side panels 482 facing away from each other are respectively provided with guide grooves 4821, and the inner side walls of the left and right ends of the dust cover 49 are respectively fixed with sliding bars 492 that cooperate with the guide grooves 4821, and the sliding bars 492 are slidably connected to the guide grooves 4821.

[0069] Guide grooves 4821 are respectively provided on the end surfaces of the two first side panels 482 that are away from each other, and sliding bars 492 that cooperate with the guide grooves 4821 are respectively fixed on the inner wall surfaces of the left and right ends of the dust cover 49. Through the sliding cooperation between the sliding bars 492 and the guide grooves 4821, the dust cover 49 can be inserted into the guide grooves 4821 from top to bottom, which is convenient for installation and disassembly and can play a dust-proof role.

[0070] See also Figure 1 and Figure 11 , further explained, the sliding door with a bottom pulley structure also includes a fixed door 5, the lower end surface of the upper door frame 1 is provided with an upper sliding groove 11 and a first mounting groove 12, the upper sliding groove 11 is located at the front end of the first mounting groove 12, the upper end surface of the lower door frame 2 is provided with a second mounting groove 22, and the second mounting groove 22 is located at the rear end of the upper edge portion 211;

[0071] The fixed door 5 is located at the end of the upper door frame 1 along its own length direction, and the upper end of the fixed door 5 is fixedly set in the first mounting groove 12, and the lower end of the fixed door 5 is fixedly set in the second mounting groove 22; the upper end of the movable door 3 is slidably connected to the upper sliding groove 11.

[0072] Since the first mounting plate 41 and the roller 422 are respectively located on the front and rear sides of the movable door 3, and the roller 422 is not connected to the rear end face of the movable door 3, the distance between the movable door 3 and the roller 422 in the front-to-back direction can be reduced, and the gap distance between the movable door 3 and the lower door frame 2 can be reduced, thereby reducing the door gap between the movable door 3 and the fixed door 5.

[0073] See also Figure 1 , further explained, the sliding door with a bottom pulley structure also includes two side door frames 6, the two side door frames 6 are respectively fixedly connected to the left and right ends of the upper door frame 1, and the lower ends of the two side door openings are respectively fixedly connected to the left and right ends of the lower door frame 2; one of the side door frames 6 is fixedly connected to the end of the fixed door 5 away from the movable door 3; the other side door frame 6 is movably connected to the end of the movable door 3 away from the fixed door 5.

[0074] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present invention without inventive effort, and such implementations will fall within the scope of protection of the present invention.

Claims

1. A sliding door with a bottom pulley structure, comprising an upper door frame, a lower door frame, a movable door, and a bottom pulley structure, wherein the upper door frame and the lower door frame are respectively disposed at the upper and lower ends of the movable door, and the upper end of the movable door is slidably connected to the upper door frame, characterized in that: The lower door frame is provided with a sliding groove along the front side surface in the longitudinal direction thereof, the sliding groove comprising an upper edge portion and a sliding groove portion opening upward, the upper edge portion being located directly above the sliding groove portion, and a moving space for the bottom pulley structure to move is formed between the upper edge portion and the sliding groove portion; The lower end of the movable door is connected to the bottom pulley structure at both ends along its length direction; the bottom pulley structure includes a first mounting plate, a pulley assembly and an anti-jump block; the pulley assembly includes a connecting piece, a wheel bearing and a roller; The first mounting plate is detachably connected to the front end surface of the movable door; one end of the connecting member is fixedly connected to the first mounting plate, and the other end of the connecting member extends from the bottom of the movable door toward the lower door frame; the inner ring of the wheel bearing is fixedly connected to the end of the connecting member away from the first mounting plate, and the outer ring of the wheel bearing is fixedly connected to the roller, and the roller is slidably connected to the slide groove portion in the movable space; The anti-jump block includes a mounting portion and an anti-jump portion, the mounting portion is detachably connected to the connecting piece, the mounting portion is located on the lower side of the movable door, and the mounting portion is located on the front side of the lower door frame; one end of the anti-jump portion is fixedly connected to the upper end face of the mounting portion, and the other end of the anti-jump portion is protruding toward the direction of the moving space, and the end of the anti-jump portion away from the mounting portion is located in the moving space, and the horizontal plane height of the upper end face of the anti-jump portion is higher than the horizontal plane height of the upper end point of the roller.

2. The sliding door with bottom pulley structure according to claim 1, characterized in that: A first avoidance space for avoiding the movable door is formed between the anti-jumping portion and the mounting portion; and an arc-shaped opening matching the roller is provided on the side end surface of the anti-jumping portion facing the roller.

3. The sliding door with bottom pulley structure according to claim 1, characterized in that: The pulley assembly further includes a plug-in block, and the anti-jump block further includes a first fixing bolt, one end of the plug-in block is fixedly connected to the connecting member, and the other end of the plug-in block is horizontally extended along the length direction of the lower door frame toward the direction of the mounting portion, the plug-in block is located on the lower side of the movable door, and the plug-in block is located on the front side of the lower door frame; The mounting portion is provided with a slot on the end face facing the plug-in block, and the front end face of the mounting portion is provided with a first through hole, which is connected to the slot; the front end face of the plug-in block is provided with a second through hole which is matched with the first through hole, and the first fixing bolt passes through the first through hole and the second through hole in sequence to fix the mounting portion and the plug-in block.

4. The sliding door with bottom pulley structure according to claim 3, characterized in that: The connecting member includes a first connecting part and a second connecting part, one end of the first connecting part is fixedly connected to the front end surface of the first mounting plate, and the other end of the first connecting part extends downward to the bottom of the movable door; one end of the second connecting part is fixedly connected to the end of the first connecting part away from the first mounting plate, and the other end of the second connecting part extends horizontally toward the lower door frame; the roller is arranged at an end of the second connecting part away from the first connecting part; and the plug-in block is fixedly connected to the second connecting part.

5. The sliding door with bottom pulley structure according to claim 4, characterized in that: The bottom pulley structure further includes a second mounting plate, one end of which is detachably connected to the front end surface of the first mounting plate, and the other end of which extends downward to the lower end of the first mounting plate; the number of the pulley assemblies is two, and the number of the anti-jump blocks is two, and the two groups of the pulley assemblies are provided in a one-to-one correspondence with the two anti-jump blocks; The two groups of pulley assemblies are symmetrically arranged at both ends of the second mounting plate along its own length direction, and the first connecting part is fixedly connected to the end face of the second mounting plate facing the movable door, the first connecting part is located below the first mounting plate, and a second avoidance space for avoiding the first mounting plate is formed between the second mounting plate and the first connecting part.

6. The sliding door with bottom pulley structure according to claim 5, characterized in that: The bottom pulley structure further includes a cam, the cam being connected to the front end surface of the second mounting plate, the cam including a first circular portion and a second circular portion, one end of the second circular portion being fixedly connected to the first circular portion, the other end of the second circular portion being protruded from the first circular portion toward the direction of the second mounting plate, and a first mounting through-hole penetrating the front end surface of the first circular portion being formed, a second mounting through-hole corresponding to the first mounting through-hole being formed in the second circular portion, and the second mounting through-hole being connected to the first mounting through-hole, and the diameter of the second mounting through-hole being larger than that of the first mounting through-hole; A third mounting through hole is formed on the front end surface of the second mounting plate, and the second circular portion is located in the third mounting through hole; A boss is provided on the end surface of the first mounting plate facing the second mounting plate, the boss is located in the second mounting through hole, and the outer peripheral wall of the boss abuts against the inner peripheral wall of the second through hole; the end surface of the boss facing the first circular portion is provided with a fourth mounting through hole corresponding to the first mounting through hole.

7. The sliding door with bottom pulley structure according to claim 6, characterized in that: The bottom pulley structure further includes a third mounting plate, a mounting post, and a second fixing bolt. The third mounting plate is arranged on the rear end surface of the movable door, and the position of the third mounting plate is arranged corresponding to the position of the first mounting plate. The mounting post is fixedly connected to the end surface of the third mounting plate facing the movable door. The first mounting plate and the mounting column have corresponding first connecting through holes on their opposite end faces, and the front end face of the movable door has a penetrating second connecting through hole. The outer peripheral wall of the mounting column abuts against the inner peripheral wall of the second connecting through hole, and the second connecting through hole is connected to the first connecting through hole. The second fixing bolt passes through the first connecting through hole and the second connecting through hole in sequence to fix the second mounting plate, the movable door and the third mounting plate.

8. The sliding door with bottom pulley structure according to claim 7, characterized in that: The bottom pulley structure further includes a mounting seat, which is arranged between the first mounting plate and the movable door, wherein the rear end surface of the mounting seat is detachably connected to the movable door, and the front end surface of the mounting seat is detachably connected to the first mounting plate; The mounting base includes a base plate and two first side plates, the base plate is detachably connected to the movable door, the left and right ends of the base plate are respectively connected to the two first side plates, and the two first side plates are respectively perpendicular to the base plate; a first accommodating space for accommodating the first mounting plate is formed between the base plate and the two first side plates; the rear end face of the first mounting plate abuts the front end face of the base plate, and the left and right end faces of the first mounting plate abut the opposite end faces of the two first side plates respectively.

9. The sliding door with bottom pulley structure according to claim 8, characterized in that: The bottom pulley structure further includes a dust cover, wherein a second accommodating space for accommodating the mounting seat and the first mounting plate is provided inside the dust cover, and the rear end surface and the lower end surface of the dust cover are both open; The end surfaces of the two first side plates facing away from each other are respectively provided with guide grooves, and the inner side walls of the left and right ends of the dust cover are respectively fixed with sliding bars that match the guide grooves, and the sliding bars are slidably connected to the guide grooves.

10. The sliding door with bottom pulley structure according to claim 1, characterized in that: The sliding door with a bottom pulley structure also includes a fixed door, the lower end surface of the upper door frame is provided with an upper sliding groove and a first mounting groove, the upper sliding groove is located at the front end of the first mounting groove, the upper end surface of the lower door frame is provided with a second mounting groove, and the second mounting groove is located at the rear end of the upper edge portion; The fixed door is located at the end of the upper door frame along its own length direction, and the upper end of the fixed door is fixedly set in the first installation groove, and the lower end of the fixed door is fixedly set in the second installation groove; the upper end of the movable door is slidably connected to the upper sliding groove.

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