阅读说明：本技术 一种可调式锁紧滑轮装置及滑轨门 (Adjustable locking pulley device and sliding rail door ) 是由 尤梦宇 刘涛 于 2020-11-30 设计创作，主要内容包括：一种可调式锁紧滑轮装置,包括固定板结构、第一调节结构、第二调节结构、滑轮结构,固定板结构包括固定板,固定板上设有凹槽、第一通孔,第一调节结构包括设置于凹槽内的第一活塞、固定杆、连接框、第二管道、第二阀门。本发明通过设置两个滑轮可以对门体上表面上的单个角起到稳定的支撑作用,并且由于两个滑轮结构分别设置于两个交叉设置且相互枢轴连接的驱动杆的上端,同时两个驱动杆处于枢轴连接位置的上方的上段长度相等,以及处于枢轴连接位置的下方的下段长度相等,从而使得两个滑轮上下移动的距离相等,以便在安装时,两个滑轮同时顶靠在门体上方的导轨上,使得两个滑轮受力均匀。(The utility model provides a locking pulley device with adjustable, includes fixed plate structure, first regulation structure, second regulation structure, pulley structure, and the fixed plate structure includes the fixed plate, is equipped with recess, first through-hole on the fixed plate, and first regulation structure is including setting up first piston, dead lever, carriage, second pipeline, the second valve in the recess. The two pulleys are respectively arranged at the upper ends of the two driving rods which are arranged in a crossed mode and are mutually pivoted, the lengths of the upper sections of the two driving rods above the pivoting connection position are equal, and the lengths of the lower sections of the two driving rods below the pivoting connection position are equal, so that the up-and-down moving distances of the two pulleys are equal, when the two pulleys are installed, the two pulleys simultaneously abut against the guide rail above the door body, and the two pulleys are uniformly stressed.)

1. The utility model provides a locking pulley device with adjustable, includes fixed plate structure, its characterized in that: the adjustable locking pulley device also comprises a first adjusting structure arranged on the fixed plate structure, a second adjusting structure arranged on the first adjusting structure, and a pulley structure arranged on the second adjusting structure, wherein the fixed plate structure comprises a fixed plate, the fixed plate is provided with a groove positioned on the upper surface of the fixed plate and a first through hole arranged on the rear surface of the fixed plate, the first through hole is communicated with the groove, the first adjusting structure comprises a first piston arranged in the groove, a fixed rod arranged on the first piston, a connecting frame arranged above the fixed rod, a second pipeline arranged above the connecting frame and a second valve arranged on the second pipeline, the connecting frame comprises a first cavity penetrating through the left and right surfaces of the connecting frame and a second through hole arranged on the upper surface of the connecting frame, and the second through hole is communicated with the first cavity, the structure is adjusted to the second is equipped with two, the second adjust the structure include the bracing piece, set up in bracing piece with sealed frame between the linking frame, set up in second piston in the sealed frame, set up in bracing piece upper end's actuating lever, the pulley structure include the elastic rod, set up in the connecting rod of elastic rod upper end, set up in the pulley of connecting rod upper end, two actuating lever cross arrangement and mutual pivot connection, two the upper segment length that is in pivot connection position top on the actuating lever equals, two the hypomere length that is in pivot connection position below on the actuating lever equals.

2. The adjustable locking pulley apparatus of claim 1, wherein: the lower end of the elastic rod is fixedly connected with the upper end of the driving rod, the upper end of the elastic rod is fixedly connected with the connecting rod, and the pulley is connected with the upper end pivot of the connecting rod.

3. The adjustable locking pulley apparatus of claim 2, wherein: the pulley structure further comprises a plurality of limiting blocks arranged on the elastic rod, the limiting blocks are located below the elastic rod in the width direction, the upper end of each limiting rod is fixedly connected with the elastic rod, and the limiting blocks are sequentially arranged.

4. The adjustable locking pulley apparatus of claim 3, wherein: two one of the actuating lever is equipped with the fourth through-hole, and another the actuating lever passes the fourth through-hole, first piston accept in the recess and with the side sliding contact of recess, the lower extreme of dead lever with first piston fixed connection, the upper end of dead lever with linking frame fixed connection, the lower extreme of second pipeline aim at the second through-hole and with the last fixed surface of linking frame is connected.

5. The adjustable locking pulley apparatus of claim 4, wherein: the lower end of the supporting rod abuts against the first piston and is in sliding connection with the first piston, the lower end of the driving rod is in pivot connection with the upper end of the supporting rod, one end of the sealing frame is fixedly connected with the supporting rod, the other end of the sealing frame is provided with an opening, and a second cavity is arranged in the sealing frame.

6. The adjustable locking pulley apparatus of claim 5, wherein: one end of the connecting frame penetrates through the opening and extends into the second cavity, the second piston is contained in the second cavity and is in sliding contact with the inner surface of the second cavity, a third through hole is formed in the second piston, and the end portion of the connecting frame is aligned to the third through hole and is fixedly connected with the second piston.

7. The adjustable locking pulley apparatus of claim 6, wherein: the fixing plate structure further comprises a limiting rope and a first spring, the limiting rope and the first spring are arranged in the groove, the lower end of the limiting rope is fixedly connected with the bottom surface of the groove, the upper end of the limiting rope is fixedly connected with the first piston, the lower end of the first spring is fixedly connected with the bottom surface of the groove, and the upper end of the limiting rope is fixedly connected with the lower surface of the first piston.

8. The adjustable locking pulley apparatus of claim 7, wherein: the fixing plate structure comprises a first pipeline arranged outside the fixing plate and a first valve arranged on the first pipeline, one end of the first pipeline is aligned to the first through hole and fixedly connected with the outer surface of the fixing plate, and the first through hole is located below the first piston.

9. The adjustable locking pulley apparatus of claim 8, wherein: the first adjusting structure further comprises fixed blocks arranged on the left side and the right side above the first piston, and a second spring arranged on the fixed blocks, the lower end of each fixed block is fixedly connected with the first piston, one end of the second spring is fixedly connected with the fixed blocks, and the other end of the second spring is fixedly connected with the supporting rod.

10. The sliding rail door comprises a door body and a plurality of supporting wheels arranged below the door body, and is characterized by further comprising two adjustable locking pulley devices according to any one of claims 1 to 9, wherein the two adjustable locking pulley devices are respectively arranged on the left side and the right side above the door body, the adjustable locking pulley devices are fixedly connected with the door body, and the supporting wheels are rotatably arranged on the lower surface of the door body.

Technical Field

The invention relates to the technical field of pulleys, in particular to an adjustable locking pulley device and a sliding rail door.

Background

The sliding rail door is widely applied due to the fact that the sliding rail door saves the door opening space and is convenient to open and close. The sliding rail door mainly comprises a door body and a pulley device arranged between the door body and a guide rail, wherein the existing single pulley device only has one pulley, stress is concentrated on one pulley when the sliding rail door is used, the pulley is easily damaged, the service life of the sliding rail door is shortened, the sliding rail door cannot play a locking role, and meanwhile, the sliding rail door is inconvenient to install and cannot adapt to installation requirements of different distances between the edge of the door body and the guide rail, so that the application range of the sliding rail door is limited.

Chinese patent CN107605303A discloses an adjustable locking pulley device and a sliding rail door thereof, which comprises a supporting plate, a first lug disposed at a first end of the supporting plate, a second lug movably connected with the first lug, a containing space formed by the first lug and the second lug, a pulley part connected with the second lug, a first limiting part disposed in the containing space, a second limiting part disposed at a second end of the supporting plate and connected with the pulley part, and a third limiting part disposed at a second end of the supporting plate and abutted against the pulley part. However, it still has the following disadvantages: firstly, only one pulley is arranged, and a single corner above a door body is supported by only one pulley, so that stress is easily concentrated on one pulley, the stability of the structure is affected, the effect of supporting the door body is not ideal, and the pulley is easily damaged; secondly, it can only rely on the fixed block to play the limited action to the pulley after the locking, the pulley can't contact with the guide rail when the distance is far away between the edge of the door body and the guide rail, and can't install to between the door body and the guide rail when the distance is near between the edge of the door body and the guide rail, and then can't satisfy the use needs of distance between different door body edges and the guide rail, application range is narrow.

Therefore, there is a need to provide a new technical solution to overcome the above-mentioned drawbacks.

Disclosure of Invention

The invention aims to provide an adjustable locking pulley device and a sliding rail door which can effectively solve the technical problems.

In order to achieve the purpose of the invention, the following technical scheme is adopted:

the utility model provides a locking pulley gear with adjustable, includes the fixed plate structure, locking pulley gear with adjustable still including set up in the structural first regulation structure of fixed plate, set up in the structural second regulation structure of first regulation, set up in the structural pulley structure of second regulation, the fixed plate structure includes the fixed plate, be equipped with the recess that is located its upper surface on the fixed plate, set up in the first through-hole of fixed plate rear surface, first through-hole with the recess intercommunication, first regulation structure including set up in first piston in the recess, set up in dead lever on the first piston, set up in the carriage of dead lever top, set up in the second pipeline of carriage top, set up in the second valve on the second pipeline, the carriage is including running through the first cavity of its left and right surfaces, Set up in its upper surface's second through-hole, the second through-hole with first cavity intercommunication, the second is adjusted the structure and is equipped with two, the second adjust the structure include the bracing piece, set up in the bracing piece with sealed frame between the linking frame, set up in second piston in the sealed frame, set up in the actuating lever of bracing piece upper end, the pulley structure include the elastic rod, set up in the connecting rod of elastic rod upper end, set up in the pulley of connecting rod upper end, two actuating lever cross arrangement and mutual pivot connection, two the upper segment length that is in pivot connection position top on the actuating lever equals, two the hypomere length that is in pivot connection position below on the actuating lever equals.

Preferably, the lower end of the elastic rod is fixedly connected with the upper end of the driving rod, the upper end of the elastic rod is fixedly connected with the connecting rod, and the pulley is pivotally connected with the upper end of the connecting rod.

Preferably, the pulley structure further comprises a plurality of limiting blocks arranged on the elastic rod, the limiting blocks are located below the elastic rod in the width direction, the upper end of each limiting rod is fixedly connected with the elastic rod, and the limiting blocks are sequentially arranged.

Preferably, one of the two driving rods is provided with a fourth through hole, the other driving rod penetrates through the fourth through hole, the first piston is accommodated in the groove and in sliding contact with the side face of the groove, the lower end of the fixing rod is fixedly connected with the first piston, the upper end of the fixing rod is fixedly connected with the connecting frame, and the lower end of the second pipeline is aligned with the second through hole and is fixedly connected with the upper surface of the connecting frame.

Preferably, the lower end of the support rod abuts against the first piston and is in sliding connection with the first piston, the lower end of the drive rod is in pivot connection with the upper end of the support rod, one end of the sealing frame is fixedly connected with the support rod, the other end of the sealing frame is provided with an opening, and a second cavity is arranged in the sealing frame.

Preferably, one end of the connecting frame penetrates through the opening and extends into the second cavity, the second piston is accommodated in the second cavity and is in sliding contact with the inner surface of the second cavity, a third through hole is formed in the second piston, and the end portion of the connecting frame is aligned to the third through hole and is fixedly connected with the second piston.

Preferably, the fixed plate structure further comprises a limiting rope and a first spring, the limiting rope and the first spring are arranged in the groove, the lower end of the limiting rope is fixedly connected with the bottom surface of the groove, the upper end of the limiting rope is fixedly connected with the first piston, the lower end of the first spring is fixedly connected with the bottom surface of the groove, and the upper end of the limiting rope is fixedly connected with the lower surface of the first piston.

Preferably, the fixing plate structure includes a first pipe disposed outside the fixing plate, and a first valve disposed on the first pipe, one end of the first pipe is aligned with the first through hole and is fixedly connected to the outer surface of the fixing plate, and the first through hole is located below the first piston.

Preferably, the first adjusting structure further comprises a fixing block arranged on the left side and the right side above the first piston, and a second spring arranged on the fixing block, the lower end of the fixing block is fixedly connected with the first piston, one end of the second spring is fixedly connected with the fixing block, and the other end of the second spring is fixedly connected with the supporting rod.

The utility model provides a slide rail door, its including the door body, set up in a plurality of supporting wheels of door body below, slide rail door still includes any embodiment of the aforesaid adjustable locking pulley gear, adjustable locking pulley gear be equipped with two and set up respectively in both sides about door body top, adjustable locking pulley gear with door body fixed connection, the supporting wheel is rotatable set up in on the lower surface of the door body.

Compared with the prior art, the invention has the following beneficial effects: the adjustable locking pulley device can play a stable supporting role for a single angle on the upper surface of the door body by arranging the two pulleys, and because the two pulley structures are respectively arranged at the upper ends of the two driving rods which are arranged in a crossed way and are mutually pivoted, the lengths of the upper sections of the two driving rods above the pivoting connection position are equal, and the lengths of the lower sections of the two driving rods below the pivoting connection position are equal, the up-and-down moving distances of the two pulleys are equal, so that when the adjustable locking pulley device is installed, the two pulleys simultaneously abut against a guide rail above the door body, and the two pulleys are uniformly stressed; the lower ends of the two driving rods are connected through the supporting rod, the sealing frame, the second piston and the connecting frame, the structure is communicated with the second cavity through the first cavity, the two driving rods are driven to rotate relatively at the same time, the two pulleys are driven to move simultaneously, air pressure in the first cavity and air pressure in the second cavity are kept inconvenient when the second valve is closed, and the first pulley and the second pulley can be locked relatively at the moment, so that the purpose of locking is achieved; meanwhile, the driving rod is driven to rotate relatively to realize coarse adjustment of the up-and-down movement of the pulley, the first pulley is enabled to move up and down rapidly through the lever principle so as to be propped against the guide rail rapidly, in order to realize fine adjustment of the up-and-down movement of the pulley and realize effective damping and buffering action on the up-and-down direction of the pulley, by arranging a first piston in the recess and blowing air into said recess, so that the first piston can be moved upwards, so as to realize fine adjustment of the vertical movement of the pulley, make the pulley tightly abut against the guide rail, and when the first valve is closed, the air pressure below the first piston is kept unchanged, thereby supporting the pulley and buffering the vibration in the vertical direction, the pulley protection effect is remarkable, and the damping and buffering effect of the pulley is obviously superior to that of elastic structures such as springs; and the setting of elastic rod can play the effect of elastic support and shock attenuation buffering to the pulley, and the setting of limiting block can play the limiting action to the bending deformation of elastic rod simultaneously, prevents its excessive bending deformation, plays the guard action to it.

Drawings

FIG. 1 is a schematic structural view of an adjustable locking pulley apparatus of the present invention;

FIG. 2 is a cross-sectional view taken along A-A' of the adjustable locking pulley apparatus of the present invention shown in FIG. 1;

FIG. 3 is a cross-sectional view taken along the line B-B' of the adjustable locking pulley apparatus of the present invention shown in FIG. 1;

FIG. 4 is a cross-sectional view taken along the direction C-C' of the adjustable locking pulley apparatus of the present invention shown in FIG. 1;

FIG. 5 is an enlarged view of a portion of the adjustable locking pulley apparatus of the present invention shown in FIG. 1 at location D;

fig. 6 is a schematic structural view of the sliding rail door of the present invention.

Detailed Description

The adjustable locking pulley device and the sliding rail door of the invention will be clearly and completely described with reference to the accompanying drawings.

As shown in fig. 1 to 5, the adjustable locking pulley apparatus 100 of the present invention includes a fixed plate structure 1, a first adjusting structure 2 disposed on the fixed plate structure 1, a second adjusting structure 3 disposed on the first adjusting structure 2, and a pulley structure 4 disposed on the second adjusting structure 3.

As shown in fig. 1 to 4, the fixed plate structure 1 includes a fixed plate 11, fasteners 12 disposed at both ends of the fixed plate 11, a plurality of limiting ropes 13 disposed on the fixed plate 11, a first spring 14, a first pipe 15 disposed outside the fixed plate 11, and a first valve 16 disposed on the first pipe 15. The fixing plate 11 is long, in this embodiment, the fixing plate 11 is rectangular, in other embodiments, the fixing plate 11 may also be another geometric body, the fixing plate 11 is used to be fixed on a door body 200 of a sliding rail door, and is located between an upper surface of the door body 200 and a guide rail, so that the door body 200 can stably move left and right along the guide rail, a groove 111 and a first through hole 112 disposed on a rear surface of the fixing plate 11 are disposed in a middle portion of the upper surface of the fixing plate 11, a surface facing a reader in fig. 1 is a front surface, a surface facing away from the reader is a rear surface, the groove 111 is formed by downward recessing from the upper surface of the fixing plate 11, in this embodiment, the groove 111 is preferably rectangular, in other embodiments, the groove 111 may also be a cylinder or another geometric body, one end of the first through hole 112 is communicated with the groove 111, and can be introduced or discharged into the groove 111 through the first through hole 112. The number of the fastening members 12 may be two or more, in this embodiment, the number of the fastening members 12 is two, the fastening members 12 may be screws or bolts, or may be other fastening members, the fastening members 12 penetrate through the upper and lower surfaces of the fixing plate 11, and the lower ends of the fastening members 12 are fixedly connected to the upper surface of the door body 200. One or more limiting ropes 13 may be provided, the limiting ropes 13 are accommodated in the groove 111, the lower end of the limiting rope 13 is fixedly connected with the bottom surface of the groove 111, and the limiting rope 13 may be made of a nylon rope material or other materials with high strength. One or more first springs 14 may be provided, the first springs 14 are accommodated in the grooves 111, the lower ends of the first springs 14 are fixedly connected with the bottom surfaces of the grooves 111, and the first springs 14 are preferably compression springs. The first pipe 15 is disposed outside the fixing plate 11, and one end of the first pipe 15 is aligned with the first through hole 112 and fixedly connected to the outer surface of the fixing plate 11, such that the first pipe 15 communicates with the inside of the groove 111 through the first through hole 112. The first valve 16 can control the flow and open/close of the gas in the first pipe 15.

The arrangement of the fixed plate structure 1 can be fixed on the upper surface of the door body 200 through the fixed plate 11 and the fastener 12, and is positioned between the door body 200 and the guide rail, so that the door body 200 can stably move left and right along the guide rail; the groove 111 and the first through hole 112 can blow air into the groove 111 conveniently, so that the distance between the pulley structure 4 and the fixing plate 11 can be adjusted, and the requirement of the distance between the upper surfaces of different door bodies 200 and the guide rail can be met; at the same time, the limiting rope 13 limits the upward movement range of the pulley structure 4, and the first spring 14 supports the pulley structure 4, so that the pulley structure 4 can always lean against the guide rail.

As shown in fig. 1 and 3 to 5, the first adjusting structure 2 includes a first piston 21, a fixing rod 22 disposed above the first piston 21, a connecting frame 23 disposed above the fixing rod 22, a second pipeline 24 disposed above the connecting frame 23, a second valve 25 disposed on the second pipeline 24, fixing blocks 26 disposed on left and right sides of the fixing plate 22, and a second spring 27 disposed on the fixing blocks 26. The shape of the first piston 21 is matched with the shape of the groove 111, the first piston 21 is accommodated in the groove 111 and is in sliding contact with the side surface of the groove 111, so that the first piston 21 can move up and down in the groove 111, the upper end of the limiting rope 13 is fixedly connected with the first piston 21, the upper end of the first spring 14 is fixedly connected with the first piston 21, the limiting rope 13 limits the upward movement distance of the first piston 21, the first spring 14 supports the first piston 21, and the first through hole 112 is located below the first piston 21. In this embodiment, two fixing rods 22 are disposed in the middle area above the first piston 21, and the lower end of the fixing rod 22 is fixedly connected to the upper surface of the first piston 21. The preferable and mutual parallel arrangement of first piston 21 of linking frame 23, the upper end of dead lever 22 with linking frame 23 fixed connection, linking frame 23 can be the cuboid, also can be the cylinder, be equipped with on the linking frame 23 and run through its left and right sides surperficial first cavity 231, be located its upper surface's second through-hole 232, the lower extreme of second through-hole 232 with first cavity 231 communicates. The lower end of the second pipe 24 is aligned with the second through hole 232 and is fixedly connected with the upper surface of the connection frame 23, so that the inside of the second pipe 24 is communicated with the first cavity 231 through the second through hole 232. The second valve 25 is used for controlling the flow and the opening and closing of the gas in the second pipeline 24, so that the gas can be conveniently blown into the first cavity 231, or the gas in the first cavity 231 can be pumped out. The fixed block 26 is provided with at least two left ends and two right ends which are respectively positioned above the first piston 21, the lower end of the fixed block 26 is fixedly connected with the first piston 21, and the side surface of the fixed block 26 abuts against the side surface of the groove 111 and is in sliding contact with the side surface. The number of the second springs 27 is at least two, the second springs 27 are respectively located on the left side and the right side above the first piston 21, the second springs 27 are located between the fixing blocks 26 on the left side and the right side, and one ends of the second springs 27 are fixedly connected with the fixing blocks 26.

The first adjusting structure 2 can be arranged by arranging the first piston 21 in the groove 111, so that when air is blown into the groove 111 through the first through hole 112, the air pressure below the first piston 21 is increased due to the fact that the first through hole 112 is located below the first piston 21, then the first piston 21 moves upwards, and further the pulley structure 4 moves upwards, so that the distance between the pulley structure and the fixing plate 11 is adjusted, the pulley structure 4 can be tightly abutted against a guide rail, the adjustment is fine adjustment, and the pulley structure 4 can move in a relatively small range; the connecting frame 23 can be fixed on the first piston 21 through the fixing rod 22, the connecting frame 23 can be connected with the second adjusting structure 3, and the second adjusting structure 3 is driven by pumping or blowing air through the second pipeline 24, so that the rough adjustment of the up-and-down adjustment of the pulley structure 4 is realized, namely the adjustment of the pulley mechanism 4 in a larger range is realized; the fixing block 26 and the second spring 27 are arranged to support the second adjusting mechanism 3.

As shown in fig. 1, 3 and 4, the second adjusting structure 3 includes support rods 31 located at the left and right sides of the connecting frame 23, sealing frames 32 disposed at the left and right ends of the connecting frame 23, a second piston 33 disposed in the sealing frames 32, and a driving rod 34 disposed at the upper end of the support rod 31. The support rod 31 is provided with two and is located the left and right sides above the first piston 21 respectively, the other end of the second spring 27 with the side fixed connection of support rod 31, in order to right the support rod 31 plays a supporting role, the lower surface of support rod 31 is leaned on the first piston 21 and with its sliding contact, makes the support rod 31 can move about on the first piston 21. The sealing frame 32 is provided with two sealing frames 32 which are respectively and correspondingly arranged on the two support rods 31, the two sealing frames 32 are arranged between the two support rods 31, one end of each sealing frame 32 is fixedly connected with the side surface of each support rod 31, the other end of each sealing frame 32 is provided with an opening, a second cavity 321 is arranged in each sealing frame 32, the openings are communicated with the second cavities 321, and the end parts of the connecting frames 23 penetrate through the openings and stretch into the second cavities 321. The two second pistons 33 are respectively arranged in the sealing frame 32, the second piston 33 is accommodated in the second cavity 321 and is in sliding contact with the inner surface of the sealing frame 32, so that the sealing frame 32 can move left and right on the second piston 33, the second piston 33 is in sealing connection with the sealing frame 32, a third through hole 331 penetrating through the left and right surfaces of the second piston 33 is arranged on the second piston 33, and the end part of the connecting frame 23 is aligned with the third through hole 331 and is fixedly connected with the second piston 33, so that the third through hole 331 is communicated with the first cavity 231, and the first cavity 231 is communicated with the second cavity 321. The two driving rods 34 are provided with two mutually crossed pivot connections, so that the two driving rods 34 can rotate relatively, the lower ends of the driving rods 34 are respectively connected with the upper ends of the corresponding supporting rods 31, so that the driving rods 34 can be driven to rotate when the supporting rods 31 move left and right, preferably, one of the two driving rods 34 is provided with a fourth through hole 341, and the other driving rod 34 penetrates through the fourth through hole 341 and realizes the pivot connection of the two driving rods, so that the connection is stable and reliable.

The second adjusting structure 3 can blow air towards the second cavities 321 in the two sealing frames 32 through one connecting frame 23 to adjust the distance between the support rods 31 on both sides, so that the drive rods 34 rotate relatively to realize the movement of the pulley structure 4 in a larger range, so that the pulley structure 4 can quickly abut against the guide rail to realize coarse adjustment; because the two driving rods 34 have the same length and the lengths of the upper end and the lower end of the pivot connection part of the two driving rods 34 are respectively correspondingly the same, when the two driving rods 34 rotate relatively, the upward movement distances of the two pulley structures 4 are the same, so that the two pulley structures 4 are simultaneously abutted against the guide rail, the stable connection between the door body 200 and the guide rail is realized, and the door body can be prevented from inclining; and because the first cavity 231 of the connection frame 23 communicates with the left and right surfaces thereof, the air pressure in the sealing frames 32 on the left and right sides is communicated, and further the left and right support rods 31 and the drive rods 34 are stressed identically, so that the stress of the two pulley structures 4 is identical, thereby preventing the influence of uneven stress on the stability of the structure and shortening the service life, the safety is high, the service life is long, and in the process of moving the door body 200 left and right, when one of the pulley structures 4 is subjected to external force, the pulley structure can still be transferred to the other sealing frame 32, the support rods 31, the drive rods 34 and the pulley structures 4 through the corresponding drive rods 34, the support rods 31 and the sealing frames 32, and the first cavity 231 of the connection frame 23, so that the force dispersion is realized, the service life of each structure is prolonged, and.

As shown in fig. 1, the pulley structure 4 is provided with two driving rods 34 respectively disposed at the upper ends thereof, and the pulley structure 4 includes an elastic rod 41, a connecting rod 42 disposed at the upper end of the elastic rod 41, a pulley 43 disposed at the upper end of the connecting rod 42, and a limiting block 44 disposed on the elastic rod 41. The lower end of the elastic rod 41 is fixedly connected to the upper end of the driving rod 34, the elastic rod 41 is made of an elastic material so as to be capable of bending and deforming, and preferably, the elastic rod 41 and the driving rod 34 are in the same straight line. The lower end of the connecting rod 42 is fixedly connected with the upper end of the elastic rod 41, and the connecting rod 42 is preferably in the same straight line with the elastic rod 41. The pulley 43 is pivotally connected to the upper end of the connecting rod 42 such that the pulley 43 can rotate on the upper end of the connecting rod 42, and the pulley 43 abuts against the slide rail. The limiting blocks 44 are arranged below the elastic rod 41 in the width direction, the limiting blocks 44 are arranged in a plurality and are sequentially arranged along the length direction of the elastic rod 41, the upper ends of the limiting blocks 44 are fixedly connected with the elastic rod 41, and the arrangement of the limiting blocks 44 arranged in sequence can limit the elastic deformation of the elastic rod 41, namely, when the upper end of the elastic rod 41 bends and deforms downwards, the lower ends of the adjacent limiting blocks 44 are close to each other until the limiting blocks abut against each other, at the moment, because the lower ends of the adjacent limiting blocks 44 abut against each other, the limiting blocks support the elastic rod 41, so that the elastic rod 41 does not continue to bend and deform, further, the limiting effect is achieved on the elastic deformation of the elastic rod 41, and the excessive bending deformation of the elastic rod is prevented.

The pulley structure 4 can be abutted against the guide rail through the pulley 43, so that the door body 200 can move left and right along the guide rail through the pulley 43; the arrangement of the elastic rod 41 can enable the pulley 43 to be tightly propped against the guide rail through bending deformation, so that the pulley 43 cannot be separated from the guide rail, and the damping and buffering effects are achieved on the pulley 43, so that the safety is good; the elastic rod 41 is matched with the limiting block 44, so that the bending deformation of the elastic rod 41 can be limited, the excessive bending deformation of the elastic rod 41 can be prevented, and the elastic rod 41 can be protected.

As shown in fig. 6, the sliding rail door of the present invention includes a plurality of door bodies 200, the adjustable locking pulley device 100 of any of the above embodiments disposed on the upper surface of the door body 200, and a plurality of support wheels 300 disposed below the door body 200. The door 200 can move left and right relatively. The supporting wheel 300 is provided with a plurality of supporting wheels 300, one preferable door body 200 corresponds to the two supporting wheels 300 and is positioned at the left side and the right side below the door body 200, the supporting wheels 300 are rotatably arranged on the lower surface of the door body 200, the supporting wheels 300 are abutted against the guide rail below the door body 200, the adjustable locking pulley devices 100 are arranged on the upper surface of the door body 200, the pulleys 43 are abutted against the guide rail above the door body 200, the door body 200 preferably corresponds to the two adjustable locking pulley devices 100, and the two adjustable locking pulley devices 100 are respectively arranged at the left side and the right side of the upper surface of the door body 200.

As shown in fig. 1 to 5, when the adjustable locking pulley device 100 is used, it is first fixed to the upper surface of the door body 200 by the fastening member 12, and preferably fixed to the left and right sides above the upper surface of the door body 200. Then, the upper end of the second duct 24 may be connected to a fan or other air extracting structure, so that the air in the first cavity 231 in the connecting frame 23 is extracted, then the air in the second cavity 321 in the sealing frame 32 is extracted through the first cavity 231, then the sealing frame 32 and the support rod 31 move towards the middle, so that the two driving rods 34 above rotate with each other, and the upper ends of the driving rods 34 move upwards, and then the elastic rod 41, the connecting rod 42 and the pulleys 43 move upwards, so that the two pulleys 43 quickly abut against the guide rail above the door body 200 through the lever principle; because the lengths of the upper ends above the pivot connection positions of the two driving rods 34 are equal, and the lengths of the lower sections below the pivot connection positions of the two driving rods 34 are equal, when the air in the first cavity 231 in the connection frame 23 is pumped out, the air pressures of the second cavities 321 of the sealing frames 32 on the left and right sides are equal to the air pressure in the first cavity 231, so that the forces on the sealing frames 32 on the left and right sides are equal, the moving distances of the two supporting rods 31 towards the middle are equal, the upward moving distances of the two pulleys 43 are equal, and the two pulleys 43 can simultaneously abut against the guide rail above the door body 200 upwards, so that the distance between the pulley 42 and the fixing plate 11 can be adjusted, thereby the distances between the upper surfaces of different door bodies 200 and the guide rail can be adapted, the forces of the two pulleys 43 abutting against the guide rail are equal, and the uniform forces can be ensured, prevent the damage to the bearing caused by uneven stress. Then, the second valve 25 is closed, the air pressure in the first cavity 231 and the second cavity 321 is kept unchanged, and the pulley 43 can be tightly abutted against the sliding rail by keeping the sealed air in the first cavity 231 and the second cavity 321 and keeping the air pressure inconvenient, so that the locking function of the pulley 43 is realized. Then, the first pipeline 15 is connected with an external fan or other blowing structures, so that external air is blown into the groove 111 through the first pipeline 15, then the first piston 21 moves upwards, the supporting rod 31, the driving rod 34, the elastic rod 41, the connecting rod 42 and the pulley 43 move upwards, fine adjustment of the pulley 43 is achieved, the pulley 43 is tightly abutted against the guide rail, the force between the pulley 43 and the guide rail is adjusted, different requirements are met, air pressure below the first piston 21 is constant, the pulley can still move up and down in the groove 111, the pulley 43 can be supported in the vertical direction, the pulley 43 can also be buffered and damped in the vertical direction, and the damping and damping effects of the pulley 43 are obviously superior to those of conventional elastic members such as springs; the distance between the pulley 43 and the fixing plate 11 can be adjusted through the cooperation of the coarse adjustment and the fine adjustment, so that the pulley 43 stably abuts against the guide rail, the pulley 43 can be supported, damped and buffered in two dimensions (vertical direction and horizontal direction), and the damping and buffering effects are more ideal; when the stress of one pulley 43 is increased due to the contact with an obstacle, the pulley transmits the force to the other pulley 43 through the corresponding connecting rod 42, the elastic rod 41, the driving rod 34, the supporting rod 31, the sealing frame 32, the second piston 33, the connecting frame 23, the other sealing frame 32, the supporting rod 31, the driving rod 34, the elastic rod 41 and the connecting rod 42, so that the two pulleys 43 share the sudden stress of the other pulley, the damage to the pulleys 43 is reduced, and the service life of the pulleys is prolonged; when the pulley 43 encounters an obstacle and moves downwards, the elastic rod 41 can bend and deform, the limiting blocks 44 move downwards along with the elastic rod, when the elastic rod 42 bends and deforms to a certain degree, the lower ends of the adjacent limiting blocks 44 can be abutted against each other, and the upper ends of the adjacent limiting blocks 44 support the elastic rod 41, so that the elastic rod 41 can be prevented from continuously deforming, the elastic rod 41 is prevented from being damaged due to excessive bending and deformation, the service life of the elastic rod 41 is prolonged, and the elastic rod 41 is protected. So far, the use process of the adjustable locking pulley device is described.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.