An adjustable height pulley device and sliding door system

Abstract

The utility model discloses an adjustable height's pulley device and sliding door system, including installation main part, be provided with adjusting cavity and adjusting hole on installation main part, the first limiting portion is set up in the inner wall of adjusting hole, adjusting assembly, adjusting assembly includes adjusting lever, connecting rod and adjusting part, and connecting rod has the first end and the second end of mutual departure, and adjusting part rotatable installation in adjusting cavity, and connecting rod and adjusting part screw thread rotation cooperation, the periphery of adjusting part is provided with a plurality of first transmission tooth, and adjusting lever rotatable is connected in adjusting hole, and adjusting lever is provided with second transmission tooth and second limiting portion, and second transmission tooth is engaged with a plurality of first transmission tooth, and second limiting portion and first limiting portion abut, and wheel body subassembly, a kind of sliding door system, including the pulley device and door body of the described. The utility model connecting rod can move in the height direction of installation main part, and the adjusting position of adjusting lever and adjusting part is accurate.

Description

Technical Field

[0001] This utility model relates to the field of sliding door technology, and in particular to an adjustable height pulley device and a sliding door system. Background Technology

[0002] Sliding doors on the market use a pulley system installed at the top or bottom of the door frame. This pulley system works in conjunction with a track to allow the door to slide. Because door heights vary, the pulley system needs to be adjusted according to the distance between the door's height and the track.

[0003] In related technologies, pulley devices are typically mounted on the door body using screws or threaded rods. When adjusting the door height during installation, the screws or threaded rods of the pulley device must be removed from the door body and rotated individually to adjust the height of the pulley device's main structure. This allows for adjustment of the pulley device's installation height after connection to the door body. However, this installation method is time-consuming and labor-intensive, requiring the screws or threaded rods to be loosened from the door body each time before adjustment and reassembly. After multiple adjustments, the connection structure is prone to loosening.

[0004] In addition, some related technologies use an adjustment structure on a pulley device to adjust the height of the screw or bolt by rotation. However, the adjustment structure is prone to displacement during rotation, which requires repositioning each time and makes adjustment inconvenient. Utility Model Content

[0005] To overcome at least one of the defects described in the prior art, this utility model provides an adjustable height pulley device and a sliding door system. The adjustable rod can rotate to drive the adjusting component inside the mounting body to rotate, thereby allowing the connecting rod to move in the height direction of the mounting body and realize the adjustment of the mounting height of the mounting body. Furthermore, the axial position of the adjusting rod is limited by the limiting cooperation of the first limiting part and the second limiting part, so that the adjustment position of the adjusting rod and the adjusting component is accurate.

[0006] The technical solution adopted by this utility model to solve its problem is: An adjustable height pulley device includes, The mounting body has an adjustment cavity and an adjustment hole; one end of the adjustment hole extends to the side of the mounting body, and the other end extends to the adjustment cavity; a first limiting part is provided on the inner wall of the adjustment hole. An adjusting assembly includes an adjusting rod, a connecting rod, and an adjusting member. The connecting rod has a first end and a second end that are opposite to each other. The adjusting member is rotatably mounted in an adjusting cavity. The first end is threadedly engaged with the adjusting member, and the second end extends out of the adjusting cavity. The adjusting member has a plurality of first transmission teeth arranged circumferentially. The adjusting rod is rotatably inserted through an adjusting hole. The adjusting rod has second transmission teeth and a second limiting portion. The second transmission teeth mesh with the plurality of first transmission teeth and guide the adjusting member to rotate when the adjusting rod rotates. The second limiting portion abuts against the first limiting portion to prevent the adjusting rod from moving axially along the adjusting rod. A wheel assembly, which is rotatably mounted on the mounting body.

[0007] As an optional implementation, the inner wall of the adjusting hole is provided with a limiting protrusion; the end of the adjusting rod is provided with a limiting groove and an adjusting section, the limiting groove and the adjusting section being spaced apart in the axial direction of the adjusting rod; the adjusting section extends into the adjusting cavity, and the limiting groove is engaged with the limiting groove; the second transmission tooth is provided on the adjusting section; The first limiting part includes the limiting protrusion; the second limiting part includes the limiting groove.

[0008] As an optional implementation, the mounting body is provided with a mounting port and a mounting cover, the mounting port extending into the adjustment cavity; the mounting cover is detachably sealed to the mounting port; the second limiting part is provided on the mounting cover and extends into the adjustment hole when the mounting port is sealed.

[0009] As an optional implementation, the mounting body is provided with a positioning groove, which is located on both sides opposite to the adjustment hole and communicates with the adjustment hole; the limiting protrusion is engaged with the positioning groove.

[0010] As an optional implementation, a first wear-resistant layer is provided between the limiting protrusion and the limiting groove.

[0011] As an optional implementation, the adjusting component includes an adjusting nut, the bottom periphery of which is provided with an adjusting step; the first transmission tooth is disposed on the adjusting step, and a plurality of the first transmission teeth are disposed in the circumferential direction of the adjusting step; the connecting rod includes a connecting screw, the connecting screw being threaded through the adjusting nut.

[0012] As an optional implementation, a second wear-resistant layer is provided between the bottom wall of the adjustment cavity and the adjustment step.

[0013] As an optional implementation, the adjustment hole is gradually inclined from bottom to top.

[0014] As an optional implementation, the end of the adjusting rod opposite to the second transmission tooth is provided with an adjusting structure.

[0015] A sliding door system includes the aforementioned pulley device and a door body, with the second end connected to the door body.

[0016] In summary, this utility model has the following technical effects: 1. The user can adjust the door from the side. By rotating the adjusting rod, the second transmission tooth of the adjusting rod extends through the adjusting hole into the adjusting cavity and engages with the first transmission tooth of the adjusting component inside the adjusting cavity. Therefore, when the adjusting rod rotates, it drives the adjusting component to rotate. The rotation of the adjusting component engages with the threaded connection rod, allowing the adjusting component to move up and down relative to the connecting rod. The height movement of the adjusting component is limited by the adjusting cavity. Thus, the up and down movement of the adjusting component relative to the connecting rod can be linked to the lifting and lowering adjustment of the main body. The second end of the connecting rod is connected to the door. After the main body is raised and lowered by the adjusting component, the wheel assembly on the main body can be adjusted relative to the height of the door. The user can simply rotate the adjusting rod according to the height of the door without disassembling the door and the connecting rod, making the operation convenient.

[0017] 2. By setting a first limiting part in the adjusting hole and a corresponding second limiting part on the adjusting rod, the second limiting part can cooperate with the first limiting part to limit the axial movement of the adjusting rod. This ensures that the axial position of the adjusting rod in the adjusting hole is relatively stable before and after each adjustment. The second transmission tooth on the adjusting rod and the first transmission tooth on the adjusting component can maintain a meshing position, eliminating the need for secondary adjustment and ensuring accurate adjustment of the adjusting rod and adjusting component. Attached Figure Description

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

[0019] Figure 1 This is a cross-sectional view of the pulley device of this utility model; Figure 2 This is a schematic diagram of the pulley device of this utility model; Figure 3 This is a schematic diagram of the pulley device of this utility model from another perspective; Figure 4This is a schematic diagram of the pulley device of this utility model from another perspective; Figure 5 This is an exploded view of the pulley device of this utility model; Figure 6 This is a schematic diagram of the installation body of the pulley device of this utility model; Figure 7 This is a schematic diagram of the mounting cover of the pulley device of this utility model.

[0020] The meanings of the reference numerals in the attached drawings are as follows: 10, mounting body; 11, mounting cavity; 111, second wear-resistant layer; 12, adjustment hole; 121, positioning groove; 13, limiting protrusion; 131, first wear-resistant layer; 14, mounting cover; 21, connecting rod; 211, first end; 212, second end; 22, adjusting component; 221, adjusting step; 222, first transmission gear; 23, adjusting rod; 231, second transmission gear; 232, limiting groove; 233, adjusting section; 30, wheel assembly; 40, connecting seat. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0023] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0024] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0025] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0026] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0027] See Figures 1-7 This utility model discloses an adjustable height pulley device, including a mounting body 10, an adjustment component, and a wheel assembly 30, wherein the wheel assembly 30 is rotatably mounted on the mounting body 10. An adjustment cavity and an adjustment hole 12 are provided on the mounting body 10. One end of the adjustment hole 12 extends to the side of the mounting body 10, and the other end extends to the adjustment cavity. A first limiting part is provided on the inner wall of the adjustment hole 12.

[0028] Specifically, the adjustment assembly includes an adjustment rod 23, a connecting rod 21, and an adjustment member 22. The connecting rod 21 has a first end 211 and a second end 212 that are opposite to each other. The adjustment member 22 is rotatably installed in the adjustment cavity. The first end 211 of the connecting rod 21 can be threadedly rotated with the adjustment member 22. The second end 212 of the connecting rod 21 extends out of the adjustment cavity and is connected to the door body. A plurality of first transmission teeth 222 are provided in the circumferential direction of the adjustment member 22.

[0029] Furthermore, the adjusting rod 23 is rotatably connected to the adjusting hole 12. The adjusting rod 23 is provided with a second transmission tooth 231 and a second limiting part. The second transmission tooth 231 on the adjusting rod 23 can extend through the adjusting hole 12 into the adjusting cavity and mesh with multiple first transmission teeth 222. Thus, when the adjusting rod 23 rotates, the engagement of the second transmission tooth 231 with the multiple first transmission teeth 222 guides the rotation of the adjusting member 22. The second limiting part abuts against the first limiting part to prevent the adjusting rod 23 from moving axially along the adjusting rod 23.

[0030] Based on the above structure, when using the adjustable height pulley device of this utility model, the pulley device can be assembled with the door body. The mounting body 10 of the pulley device can be assembled to the door body through the connecting rod 21. Specifically, the first end 211 of the connecting rod 21 extends into the mounting cavity 11 of the mounting body 10 and is threadedly engaged with the adjusting member 22 in the mounting cavity 11. The second end 212 of the connecting rod 21 extends out of the mounting cavity 11 and is assembled with the door body. Then, the wheel assembly 30 on the mounting body 10 can slide with the slide rail, thereby realizing the sliding of the door body.

[0031] When adjusting the height of the pulley device, the adjusting rod 23 is guided to the side of the mounting body 10 through the adjusting hole 12, allowing the user to adjust it from the side of the door. By rotating the adjusting rod 23, the second transmission tooth 231 of the adjusting rod 23 extends through the adjusting hole 12 into the adjusting cavity and engages with the first transmission tooth 222 of the adjusting member 22 in the adjusting cavity. Therefore, when the adjusting rod 23 rotates, it drives the adjusting member 22 to rotate. The rotation of the adjusting member 22 allows it to engage with the connecting rod 21 threadedly, and the adjusting member 22 can then move relative to the connecting rod 21. The height movement of the adjusting component 22 is limited by the adjusting cavity, so the up and down movement of the adjusting component 22 relative to the connecting rod 21 can be linked to the installation body 10 for lifting and lowering adjustment. The second end 212 of the connecting rod 21 is connected to the door body. In this way, after the installation body 10 is lifted and lowered by the adjusting component 22, the wheel assembly 30 on the installation body 10 can be adjusted relative to the height of the door body. The rotation direction of the adjusting rod 23 can be turned according to the height of the door body. There is no need to separate the door body from the connecting rod 21, which is convenient to operate.

[0032] It should be noted that since the height adjustment of the mounting body 10 is achieved by rotating the adjusting rod 23 of the adjusting hole 12, each time the adjusting rod 23 is rotated, the second transmission tooth 231 on the adjusting rod 23 and the first transmission tooth 222 on the adjusting member 22 need to mesh accordingly. If the position of the adjusting rod 23 within the adjusting hole 12 moves axially upward, the positions of the first transmission tooth 222 and the second transmission tooth 231 are easily misaligned. In the next adjustment, the first transmission tooth 222 and the second transmission tooth 231 need to be re-aligned before adjustment can be performed.

[0033] Therefore, in this application, by setting a first limiting part in the adjusting hole 12 and a corresponding second limiting part on the adjusting rod 23, the second limiting part can cooperate with the first limiting part to limit the axial movement of the adjusting rod 23. This makes the axial position of the adjusting rod 23 relatively stable in the adjusting hole 12 before and after each adjustment. The second transmission tooth 231 on the adjusting rod 23 and the first transmission tooth 222 on the adjusting member 22 can maintain the meshing position without secondary adjustment and alignment. In this way, the adjustment position of the adjusting rod 23 and the adjusting member 22 is accurate.

[0034] Of course, the above-mentioned wheel assembly includes two pulleys. Wheel assemblies are set on both sides of the mounting body. The corresponding pulleys of the wheel assembly on both sides are rotatably connected to the mounting body through wheel axles, so that the pulleys and slide rails can slide together. In this way, the sliding structure of the pulley device and the slide rail is stable.

[0035] As an optional implementation, the inner wall of the adjusting hole 12 in this embodiment is provided with a limiting protrusion 13, and a limiting groove 232 and an adjusting section 233 are provided at the end of the adjusting rod 23. The limiting groove 232 and the adjusting section 233 are spaced apart in the axial direction of the adjusting rod 23. The second transmission tooth 231 is provided on the adjusting section 233. During assembly, the adjusting rod 23 can be inserted through the adjusting hole 12, and the adjusting section 233 of the adjusting rod 23 can be inserted into the adjusting cavity. When the second transmission tooth 231 on the adjusting section 233 meshes with the first transmission tooth 222 on the adjusting member 22, the limiting groove 232 on the adjusting rod 23 engages with the limiting protrusion 13. In this way, the second transmission tooth 231 of the adjusting section 233 can accurately mesh with the first transmission tooth 222 on the adjusting member 22 by the position of the limiting protrusion 13 engaging with the limiting groove 232 on the adjusting rod 23, thereby achieving positioning assembly.

[0036] Furthermore, due to the engagement between the limiting protrusion 13 and the limiting groove 232, when the adjusting rod 23 rotates, the limiting protrusion 13 can slide relative to the limiting groove 232 when the adjusting rod 23 rotates, without restricting the rotational movement of the adjusting rod 23. However, the axial movement of the adjusting rod 23 is restricted, thus allowing the adjusting section 233 to extend out of the adjusting cavity. The second transmission tooth 231 on the adjusting section 233 can maintain a stable meshing position with the first transmission tooth 222 on the adjusting member 22.

[0037] Based on this structure, the first limiting part includes a limiting protrusion 13; the second limiting part includes a limiting groove 232.

[0038] Of course, in other cases, an elastic pin can be provided on the outer peripheral wall of the adjusting rod 23, and an annular groove can be provided on the inner wall of the adjusting hole 12. In this way, the elastic pin slides and corresponds with the annular groove of the adjusting hole 12, which does not affect the rotation of the adjusting rod 23, but restricts the axial movement of the adjusting rod 23.

[0039] As an optional implementation, the mounting body 10 is provided with a mounting port and a mounting cover 14. The mounting port extends into the adjustment cavity, so that the mounting port can be used as an assembly position for the adjustment component 22 and the connecting rod 21, making it convenient to assemble the adjustment component 22 and the connecting rod 21 inside the mounting body 10.

[0040] The aforementioned mounting cover 14 is detachably sealed to the mounting opening, and a second limiting part is provided on the mounting cover 14 and extends into the adjustment hole 12 when the cover is sealed to the mounting opening. The second limiting part is set on the mounting cover 14, so that when assembling the adjustment component, the mounting cover 14 is separated from the mounting body 10. After the adjustment component 22 and the connecting rod 21 are assembled in place, the adjustment rod 23 extends out of the adjustment cavity from the adjustment hole 12 for pre-positioning assembly. Then, the limiting protrusion 13 on the mounting cover 14 is aligned with the limiting groove 232 on the adjustment rod 23, and then assembled to the mounting body 10 by screws or bolts, so that the limiting protrusion 13 on the mounting cover 14 can be limited and engaged in the limiting groove 232 of the adjustment rod 23, realizing limiting assembly and convenient disassembly and assembly.

[0041] More specifically, a positioning groove 121 can be provided on the mounting body 10. The positioning groove 121 is located on both sides opposite to the adjustment hole 12 and is in communication with the adjustment hole 12. In this way, when the mounting cover 14 is sealed to the mounting opening of the mounting body 10, the limiting protrusion 13 can be engaged with the limiting groove 232 of the adjustment rod 23. The part of the limiting protrusion 13 can also extend out of the limiting groove 232 and be engaged in the positioning groove 121, so as to realize the positioning assembly of the mounting cover 14. That is, after the mounting cover 14 is assembled, it is positioned by the positioning groove 121, the assembly position is accurate, and the assembly structure is stable.

[0042] As an optional implementation, a first wear-resistant layer 131 is provided between the limiting protrusion 13 and the limiting groove 232. The first wear-resistant layer 131 can be made of wear-resistant materials such as wear-resistant pads or wear-resistant coatings in the prior art. Since the limiting protrusion 13 and the limiting groove 232 are in frictional engagement when the adjusting rod 23 is rotated for adjustment, in order to reduce the loosening caused by wear after multiple adjustments, the first wear-resistant layer 131 can be provided between the limiting protrusion 13 and the limiting groove 232 to reduce the loosening caused by wear.

[0043] As an optional implementation, the adjusting member 22 includes an adjusting nut, with an adjusting step 221 protruding from the bottom periphery of the adjusting nut so that the adjusting step 221 engages with the bottom wall of the adjusting cavity. The aforementioned first transmission teeth 222 are disposed on the adjusting step 221, and multiple first transmission teeth 222 are disposed in the circumferential direction of the adjusting step 221. This allows the adjusting step 221 to serve as the basis for the first transmission teeth 222, facilitating the machining of multiple first transmission teeth 222. Furthermore, the multiple first transmission teeth 222 on the adjusting step 221 mesh with the second transmission teeth 231 of the adjusting rod 23, resulting in a larger transmission surface and thus a stable transmission structure.

[0044] Based on this structure, the connecting rod 21 includes a connecting screw, which is threaded into the adjusting nut. The entire connecting screw is threaded, so the adjusting part 22 has a greater lifting height relative to the connecting screw. The second end 212 of the connecting screw can also be directly threaded to the door body, making disassembly and assembly convenient.

[0045] As an optional implementation, a second wear-resistant layer 111 is provided between the bottom wall of the adjustment cavity and the adjustment step 221.

[0046] Similarly, the second wear-resistant layer 111 can be made of wear-resistant materials such as wear-resistant pads or wear-resistant coatings in the prior art. Since the adjustment step 221 of the adjustment member 22 is in frictional engagement with the bottom wall of the mounting cavity 11 when the adjustment member 22 is rotated for adjustment, in order to reduce the loosening caused by wear after multiple adjustments, the second wear-resistant layer 111 can be provided between the limiting step of the adjustment member 22 and the bottom wall of the adjustment cavity to reduce the loosening caused by wear.

[0047] As an optional implementation, the adjustment hole 12 is gradually inclined from bottom to top, so that the adjustment rod 23, which can be rotatably inserted into the adjustment hole 12, can be inclined. When the pulley device is applied to the top of the door, after the adjustment rod 23 is assembled into the adjustment hole 12, the end of the adjustment rod 23 away from the second transmission tooth 231 faces downward, which is convenient for the user to adjust from below.

[0048] Of course, if the pulley device is applied to the bottom of the door, then after the adjusting rod 23 is assembled into the adjusting hole 12, the end of the adjusting rod 23 that is away from the second transmission tooth 231 faces upward, which makes it convenient for the user to make adjustments from above.

[0049] As an optional implementation, the end of the adjusting rod 23 away from the second transmission tooth 231 is provided with an adjusting structure. The adjusting structure may include a cross hole or a notch and groove for screwdrivers, etc., so that the adjusting rod 23 can be used in conjunction with screwdrivers and other structures, and the adjustment is convenient.

[0050] Example 2, See Figures 1-7 This embodiment provides a sliding door system, including the pulley device of embodiment 1 and the door body. The second end 212 is connected to the door body. Specifically, in order to facilitate the stable assembly of the second end 212 of the connecting rod 21 with the door body, a connecting seat 40 can be provided at the second end 212. The connecting seat 40 is assembled to the door body by screws or bolts, thereby realizing the assembly of the pulley device and the door body.

[0051] The mounting body 10 of the pulley device can be assembled to the door body via the connecting rod 21. Specifically, the first end 211 of the connecting rod 21 extends into the mounting cavity 11 of the mounting body 10 and is threadedly engaged with the adjusting piece 22 in the mounting cavity 11. The second end 212 of the connecting rod 21 extends out of the mounting cavity 11 and is assembled with the door body. Then, the wheel assembly 30 on the mounting body 10 can slide with the slide rail, thereby realizing the sliding of the door body.

[0052] When adjusting the height of the pulley device, the adjusting rod 23 is guided to the side of the mounting body 10 through the adjusting hole 12, allowing the user to adjust it from the side of the door. By rotating the adjusting rod 23, the second transmission tooth 231 of the adjusting rod 23 extends into the adjusting cavity through the adjusting hole 12 and engages with the first transmission tooth 222 of the adjusting member 22 in the adjusting cavity. Therefore, when the adjusting rod 23 rotates, it drives the adjusting member 22 to rotate. The rotation of the adjusting member 22 allows it to engage with the connecting rod 21 threadedly, and the adjusting member 22 can move relative to the connecting rod 21. The height of the adjusting component 22 is limited by the adjusting cavity, so the vertical movement of the adjusting component 22 relative to the connecting rod 21 can be linked to the installation body 10 for lifting and lowering adjustment. The second end 212 of the connecting rod 21 is connected to the door body. Therefore, after the installation body 10 is lifted and lowered by the adjusting component 22, the wheel assembly 30 on the installation body 10 can be adjusted relative to the height of the door body. The rotation direction of the adjusting rod 23 can be adjusted according to the height of the door body. There is no need to separate the door body from the connecting rod 21, which is convenient to operate.

[0053] It should be noted that since the height adjustment of the mounting body 10 is achieved by rotating the adjusting rod 23 of the adjusting hole 12, each time the adjusting rod 23 is rotated, the second transmission tooth 231 on the adjusting rod 23 and the first transmission tooth 222 on the adjusting member 22 need to mesh accordingly. If the position of the adjusting rod 23 within the adjusting hole 12 moves axially upward, the positions of the first transmission tooth 222 and the second transmission tooth 231 are easily misaligned. In the next adjustment, the first transmission tooth 222 and the second transmission tooth 231 need to be re-aligned before adjustment can be performed.

[0054] Therefore, in this application, by setting a first limiting part in the adjusting hole 12 and a corresponding second limiting part on the adjusting rod 23, the second limiting part can cooperate with the first limiting part to limit the axial movement of the adjusting rod 23. This makes the axial position of the adjusting rod 23 relatively stable in the adjusting hole 12 before and after each adjustment. The second transmission tooth 231 on the adjusting rod 23 and the first transmission tooth 222 on the adjusting member 22 can maintain the meshing position without secondary adjustment and alignment. In this way, the adjustment position of the adjusting rod 23 and the adjusting member 22 is accurate.

[0055] Of course, the other structures of the pulley device in this embodiment are the same as those in Embodiment 1, and its structure and effect on the sliding door system are the same as those in Embodiment 1, so they will not be described in detail here.

[0056] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. An adjustable height pulley device, characterized by, include, The mounting body has an adjustment cavity and an adjustment hole; one end of the adjustment hole extends to the side of the mounting body, and the other end extends to the adjustment cavity; a first limiting part is provided on the inner wall of the adjustment hole. An adjustment assembly includes an adjustment rod, a connecting rod, and an adjustment member. The connecting rod has a first end and a second end that are opposite to each other. The adjustment member is rotatably mounted in an adjustment cavity. The first end is threadedly engaged with the adjustment member, and the second end extends out of the adjustment cavity. The adjusting member is provided with a plurality of first transmission teeth in the circumferential direction; the adjusting rod is rotatably connected to the adjusting hole, and the adjusting rod is provided with a second transmission tooth and a second limiting part. The second transmission tooth meshes with the plurality of first transmission teeth and guides the adjusting member to rotate when the adjusting rod rotates; the second limiting part abuts against the first limiting part to prevent the adjusting rod from moving along the axial direction of the adjusting rod. A wheel assembly, which is rotatably mounted on the mounting body.

2. The height-adjustable pulley assembly of claim 1, wherein, The inner wall of the adjusting hole is provided with a limiting protrusion; the end of the adjusting rod is provided with a limiting groove and an adjusting section, the limiting groove and the adjusting section being spaced apart along the axial direction of the adjusting rod; the adjusting section extends into the adjusting cavity, and the limiting groove engages with the limiting groove; the second transmission tooth is provided on the adjusting section; The first limiting part includes the limiting protrusion; the second limiting part includes the limiting groove.

3. The height-adjustable pulley device according to claim 2, characterized in that, The mounting body is provided with a mounting port and a mounting cover, the mounting port extending into the adjustment cavity; the mounting cover is detachably sealed to the mounting port; the second limiting part is provided on the mounting cover and extends into the adjustment hole when the cover is sealed to the mounting port.

4. The height-adjustable pulley device according to claim 3, characterized in that, The mounting body is provided with a positioning groove, which is located on both sides opposite to the adjustment hole and communicates with the adjustment hole; the limiting protrusion is engaged with the positioning groove.

5. The height-adjustable pulley device according to claim 2, characterized in that, A first wear-resistant layer is provided between the limiting protrusion and the limiting groove.

6. The height-adjustable pulley device according to any one of claims 1-5, characterized in that, The adjusting component includes an adjusting nut, the bottom periphery of which is provided with an adjusting step; the first transmission tooth is disposed on the adjusting step, and a plurality of the first transmission teeth are disposed in the circumferential direction of the adjusting step; the connecting rod includes a connecting screw, the connecting screw being threaded through the adjusting nut.

7. The height-adjustable pulley device according to claim 6, characterized in that, A second wear-resistant layer is provided between the bottom wall of the adjustment cavity and the adjustment step.

8. The height-adjustable pulley device according to any one of claims 1-5, characterized in that, The adjustment hole gradually slopes from bottom to top.

9. The height-adjustable pulley device according to any one of claims 1-5, characterized in that, An adjustment structure is provided at the end of the adjusting rod that is away from the second transmission tooth.

10. A sliding door system, characterized in that, It includes the pulley device and the door body according to any one of claims 1-9, wherein the second end is connected to the door body.

Images