A hanging wheel structure for adjusting height of sliding door

Abstract

The utility model relates to a hanging wheel technical field provides a kind of hanging wheel structure of sliding door height convenient to adjust, through the cooperation structure of limiting block and limiting slot, the reliable locking of two-way after the height adjustment of slide is realized.When the height adjustment of slide is completed, first bolt is positioned in first threaded hole, limiting block and limiting slot form rigid constraint, effectively prevent slide from moving down due to gravity, on the other hand, when external force attempts to push slide to move up, limiting slot is against limiting block, and limiting block cannot move, thereby preventing slide from moving upward.The structure not only solves the problem that the existing hanging wheel can still move up after adjustment, leading to unstable sliding door height and easy deviation, but also takes into account the simplicity of adjustment operation and the reliability of locked state, significantly improving the stability, safety and long-term stability of sliding door operation.

Description

Technical Field

[0001] This utility model relates to the field of hanging wheel technology, and in particular to a hanging wheel structure that facilitates the adjustment of sliding door height. Background Technology

[0002] In sliding door systems, the roller structure is a key component for support and sliding, and its height adjustment function is crucial for adapting to installation errors or uneven ground conditions. In existing technologies, common height adjustment methods often employ a structure where bolts press against the bottom or side wall of the slide block. Tightening the bolts pushes the slide block up along the roller seat groove, thus raising the sliding door. However, this type of structure typically only restricts the downward movement of the slide block. After height adjustment and locking, if subjected to external forces (such as accidental impact, vibration, or installation stress), the slide block may still be accidentally pushed up, causing the sliding door to shift position, become unstable, or even derail.

[0003] Furthermore, while some existing sliding door rollers are equipped with guide structures to enhance the stability of the slide's movement, they lack an effective mechanism to constrain the slide's vertical displacement. Especially after adjustment, the bolts used for lifting often only serve a one-way limiting function—preventing the slide from sliding down due to gravity, but failing to prevent it from continuing to move upwards under external force. This one-way constraint deficiency makes it difficult to maintain a stable sliding door height over a long period, affecting user experience and product lifespan, and increasing subsequent maintenance costs.

[0004] Therefore, there is an urgent need for a new type of hanging wheel structure that can achieve simple height adjustment while ensuring that the sliding block can neither move down nor up after adjustment through the cooperation of the limiting block and the limiting groove, thereby achieving true two-way locking and ensuring the long-term stable and reliable height of the sliding door.

[0005] The purpose of this invention is to solve the problem that in existing hanging wheel structures, the sliding block can still move upward under the action of external force after the height adjustment is completed, resulting in unstable sliding door height and easy deviation. Utility Model Content

[0006] The purpose of this invention is to solve the problem that in existing hanging wheel structures, the sliding block can still move upward under external force after height adjustment, leading to unstable sliding door height and easy deviation. This invention adopts the following technical solution: A roller structure for adjusting the height of a sliding door includes a roller base, a groove extending along its height direction, a slide block slidably fitted within the groove, a connecting block for connecting the sliding door mounted at the bottom end of the slide block, an inclined portion on one side of the slide block with a limit groove, a first threaded hole on one side of the roller base communicating with the groove, a first bolt threadedly connected within the first threaded hole, and a limit block at one end of the first bolt slidably fitted within the limit groove.

[0007] As described above, a roller structure for adjusting the height of a sliding door is provided, wherein guide grooves are provided on both sides of the roller seat, the guide grooves are connected to the slide groove, and guide blocks are provided on both sides of the slide seat, the guide blocks being slidably engaged in the guide groove.

[0008] As described above, in a sliding door height adjustment mechanism, the maximum sliding stroke of the guide block relative to the guide groove is less than the maximum sliding stroke of the limiting block relative to the limiting groove.

[0009] As described above, in a sliding door height adjustment mechanism, the axis of the first threaded hole is perpendicular to the surface of the inclined portion.

[0010] As described above, in a sliding door height adjustment mechanism, the guide block is fitted inside the slide block and is threadedly connected to the slide block.

[0011] As described above, in a sliding door height-adjustable roller structure, the surface of the inclined portion is inclined from top to bottom toward the center of the slide block.

[0012] As described above, in a sliding door height-adjustable roller structure, the first bolt and the limiting block are integrally formed.

[0013] As described above, a hanging wheel structure for easy adjustment of sliding door height is provided at the bottom of the slide block, and the connecting block includes a horizontal part with a slot, the slot being slidably engaged with the slot.

[0014] As described above, a hanging wheel structure for easy adjustment of sliding door height is provided, wherein the locking block has a through groove, a second bolt is provided in the through groove, the length of the second bolt is greater than the length of the through groove, and a second threaded hole is provided on one side of the horizontal part for threaded connection with the second bolt.

[0015] As described above, a hanging wheel structure for easy adjustment of sliding door height is provided with hanging wheel shafts on both opposite side walls of the hanging wheel seat. The inner wall of the hanging wheel shaft is threaded, and the hanging wheel shaft is used to install rollers.

[0016] Implementing the embodiments of this utility model has the following beneficial effects: 1. In this utility model, the cooperation structure of the limiting block and the limiting groove achieves reliable bidirectional locking of the slide after height adjustment. After the slide height is adjusted, the first bolt is positioned in the first threaded hole, and the limiting block and the limiting groove form a rigid constraint, effectively preventing the slide from moving downwards due to gravity. On the other hand, when an external force attempts to push the slide upwards, the limiting groove abuts against the limiting block, preventing the limiting block from moving and thus preventing the slide from moving upwards. This structure not only solves the problem of unstable sliding door height and easy deviation caused by the slide still moving upwards after adjustment using existing rollers, but also takes into account the ease of adjustment operation and the reliability of the locking state, significantly improving the smoothness, safety, and long-term stability of the sliding door operation.

[0017] 2. In this utility model, a limiting block is set at one end of the first bolt and slidably fitted into the limiting groove of the slide block. Combined with the sliding fit structure of the guide groove on the roller seat and the guide block on the slide block, and with the maximum sliding stroke of the guide block relative to the guide groove being less than the maximum sliding stroke of the limiting block relative to the limiting groove, it is ensured that the limiting block is always constrained within the limiting groove throughout the entire process of adjusting the sliding door height. This effectively prevents the first bolt from completely coming out of the first threaded hole and completely solves the problem of the adjusting bolt being easily lost. At the same time, by using the tightening of the first bolt to push the slide block upward on the inclined surface, the active adjustment of the sliding door height is realized, making operation labor-saving and convenient. The fit between the guide block and the guide groove ensures the linearity and stability of the slide block's movement, preventing deviation and jamming during operation. Attached Figure Description

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

[0019] Figure 1 This is a schematic diagram of the overall structure of a hanging wheel structure for easy adjustment of sliding door height according to this utility model.

[0020] Figure 2 yes Figure 1 A structural diagram from another angle.

[0021] Figure 3 This is an exploded view of the riveting mechanism of the hanging wheel structure of the present invention, which facilitates the adjustment of the height of a sliding door.

[0022] Figure 4 yes Figure 3 A structural diagram from another angle.

[0023] Figure 5This is a cross-sectional view of the riveting mechanism of the hanging wheel structure of the present invention, which facilitates the adjustment of the height of a sliding door.

[0024] As shown in the figure: 1. Hanger seat; 11. Slide groove; 12. Guide groove; 13. Hanger shaft; 14. First bolt; 141. Limiting block; 15. First threaded hole; 2. Slide seat; 21. Inclined part; 22. Guide block; 23. Second bolt; 24. Limiting groove; 25. Locking block; 26. Through groove; 3. Connecting block; 31. Horizontal part; 311. Second threaded hole; 32. Locking groove. Detailed Implementation

[0025] 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.

[0026] like Figures 1 to 5As shown, this utility model proposes a hanging wheel structure for easy adjustment of sliding door height, including a hanging wheel base 1. The hanging wheel base 1 has a groove 11 extending along its height direction. A slide block 2 is slidably fitted in the groove 11. A connecting block 3 for connecting the sliding door is installed at the bottom end of the slide block 2. An inclined portion 21 is provided on one side of the slide block 2. The inclined portion 21 is provided with a limiting groove 24. A first threaded hole 15 is provided on one side of the hanging wheel base 1. The first threaded hole 15 communicates with the groove 11. A first bolt 14 is threadedly connected in the first threaded hole 15. A limiting block 141 is provided at one end of the first bolt 14. The limiting block 141 is slidably fitted in the limiting groove 24. When it is necessary to raise the height of the sliding door, tighten the first bolt 14. The limiting block 141 at its end is pushed forward and acts on the side wall of the limiting groove 24 of the inclined portion 21 on the slide block 2. Since the inclined part 21 is an inclined plane, the thrust will generate a component force perpendicular to the inclined plane. This component force forces the slide block 2 to slide upward in the slide groove 11 of the hanging wheel seat 1, thereby driving the connecting block 3 and the connected sliding door to rise synchronously, realizing active height adjustment. When it is necessary to lower the height of the sliding door, loosen the first bolt 14, and the slide block 2 slides downward along the slide groove 11 under the action of the sliding door's own weight. After the adjustment is completed, if the slide block 2 attempts to move downward due to gravity, it will drive the limiting groove 24 to pull the limiting block 141 downward. However, since the first bolt 14 is in a tightened state and the limiting block 141 is constrained in the limiting groove 24, this movement is effectively prevented. If an external force attempts to push the slide block 2 upward, the upper side wall of the limiting groove 24 will abut against the limiting block 141, and the limiting block 141 is fixed in the first threaded hole 15 by the first bolt 14 and cannot move. Therefore, the slide block 2 also cannot move upward. Therefore, after the height adjustment is completed, the slide block 2 is reliably locked in both directions, and cannot move down or up, thus achieving reliable two-way locking and effectively preventing the sliding door from shifting in height or becoming unstable during operation.

[0027] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, guide grooves 12 are provided on both sides of the roller seat 1, and the guide grooves 12 are connected to the sliding groove 11. Guide blocks 22 are provided on both sides of the slide block 2, and the guide blocks 22 are slidably engaged in the guide grooves 12. When the slide block 2 slides up and down in the sliding groove 11 of the roller seat 1 to adjust the height of the sliding door, the guide blocks 22 on both sides of the slide block 2 simultaneously slide in the guide grooves 12 on both sides of the roller seat 1. This structure provides precise constraints on the movement of the slide block 2, ensuring that it can only make linear reciprocating movements along the extension direction of the sliding groove 11, effectively preventing the slide block 2 from lateral offset, twisting or tilting during adjustment or operation.

[0028] Furthermore, as a preferred embodiment of the invention and not a limitation thereof, the maximum sliding stroke of the guide block 22 relative to the guide groove 12 is less than the maximum sliding stroke of the limiting block 141 relative to the limiting groove 24. Throughout the adjustment process, regardless of how the slide block 2 moves within its allowable stroke due to the lifting and lowering of the sliding door, the limiting block 141 is always constrained within the physical boundary of the limiting groove 24 and will not come out from either end of the limiting groove 24. This effectively prevents the first bolt 14 from falling out of the first threaded hole 15 and being lost during the adjustment process, solving the problem of easily lost parts in the prior art.

[0029] Furthermore, as a preferred embodiment of the invention and not a limitation thereof, the axis of the first threaded hole 15 is perpendicular to the surface of the inclined portion 21. When the first bolt 14 is tightened, its advancing direction forms a 90-degree angle with the surface of the inclined portion 21. This geometric relationship maximizes the efficiency of force utilization, ensuring that sufficient lifting force is generated with minimal tightening force to overcome the weight of the sliding door during adjustment.

[0030] Furthermore, as a preferred embodiment of the invention and not a limitation thereof, the surface of the inclined portion 21 is inclined downwards towards the center of the slide block 2. After the sliding door is supported by the roller structure, the weight of the sliding door will continuously pull the slide block 2 downwards. This pulling force is transmitted through the slide block 2, so that the inclined surface of the inclined portion 21 is always in close contact with the limiting block 141 at the end of the first bolt 14. When locking is required, tightening the first bolt 14 will cause the advancing limiting block 141 to apply a reverse thrust to the inclined surface. Since the inclined surface is inclined inwards and downwards, this thrust will decompose into a component force that pushes the slide block 2 outwards, thereby forcing the slide block 2 to press more tightly against the inner wall of the groove 11 of the roller seat 1, achieving locking and positioning.

[0031] Furthermore, as a preferred embodiment of the invention and not a limitation thereof, the guide block 22 is fitted inside the slide 2, and the guide block 22 is threadedly connected to the slide 2. During installation, the first bolt 14 is screwed into the first threaded hole 15 of the roller seat 1, ensuring that the limiting block 141 at its end is in the appropriate position; then, the slide 2 is inserted from the side or end of the roller seat 1, aligning the limiting groove 24 on its inclined portion 21 with and accommodating the limiting block 141; finally, the guide block 22 is fitted onto the slide 2 and securely fixed with threads, so that the outer circumferential surface of the guide block 22 forms a sliding fit with the guide grooves 12 on both sides of the roller seat 1, thereby completing the construction of the entire motion guiding mechanism. The guide block 22 is a detachable independent component, reducing the assembly difficulty between the slide 2 and the roller seat 1.

[0032] Optionally, in some embodiments, the first bolt 14 and the limiting block 141 are integrally formed, which enhances the structural strength and reliability and avoids the failure risks such as interface loosening, weld failure or fatigue fracture that may occur due to welding, riveting or threaded connection in the split structure.

[0033] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the bottom end of the slide block 2 is provided with a locking block 25, and the connecting block 3 includes a horizontal portion 31, the horizontal portion 31 having a locking groove 32, the locking groove 32 slidingly engaging with the locking block 25. The locking block 25 has a through groove 26, and a second bolt 23 is disposed in the through groove 26, the length of the second bolt 23 being greater than the length of the through groove 26. A second threaded hole 311 is provided on one side of the horizontal portion 31 for threaded connection with the second bolt 23. During assembly, the locking groove 32 of the connecting block 3 is aligned with the locking block 25 and slid in along its width direction to achieve quick positioning and connection between the two. Subsequently, the second bolt 23 is inserted laterally into the through groove 26 on the locking block 25, and one end is screwed into the second threaded hole 311 on the side wall of the horizontal portion 31. Since the total length of the second bolt 23 is greater than the length of the through groove 26, when the second bolt 23 is tightened, its head will abut against one end of the side wall of the through groove 26, while the threaded end will be pulled towards the second threaded hole 311, thereby pressing the connecting block 3 firmly onto the slide block 2 through the pulling force.

[0034] Furthermore, as a preferred embodiment of the invention and not a limitation thereof, each of the opposite side walls of the roller seat 1 is provided with a roller shaft 13. The inner wall of the roller shaft 13 is threaded, and the roller shaft 13 is used to install rollers. When installing rollers, the rollers are fitted onto the outer periphery of the roller shaft 13. Then, fasteners are inserted from one side of the roller, passing through the center hole of the roller in sequence, and screwed into the internal thread inside the roller shaft 13. By tightening the fasteners, their heads are pressed against the side of the roller, thereby axially fixing the rollers to the roller shaft 13. This installation method facilitates the individual replacement and maintenance of the rollers, improving the practicality and maintainability of the entire roller structure.

[0035] Example 1: This utility model proposes a hanging wheel structure for easy adjustment of sliding door height, including a hanging wheel base 1. The hanging wheel base 1 has a groove 11 extending along its height direction. A slide block 2 is slidably fitted in the groove 11. A connecting block 3 for connecting the sliding door is installed at the bottom end of the slide block 2. An inclined portion 21 is provided on one side of the slide block 2, and a limiting groove 24 is provided in the inclined portion 21. A first threaded hole 15 is provided on one side of the hanging wheel base 1, and the first threaded hole 15 communicates with the groove 11. A first bolt 14 is threadedly connected in the first threaded hole 15. A limiting block 141 is provided at one end of the first bolt 14, and the limiting block 141 is slidably fitted in the limiting groove 24. When it is necessary to raise the height of the sliding door, tighten the first bolt 14, and the limiting block 141 at its end will be pushed forward and act on the side wall of the limiting groove 24 of the inclined portion 21 on the slide block 2. Since the inclined part 21 is an inclined plane, the thrust will generate a component force perpendicular to the inclined plane. This component force forces the slide block 2 to slide upward in the slide groove 11 of the hanging wheel seat 1, thereby driving the connecting block 3 and the connected sliding door to rise synchronously, realizing active height adjustment. When it is necessary to lower the height of the sliding door, loosen the first bolt 14, and the slide block 2 slides downward along the slide groove 11 under the action of the sliding door's own weight. After the adjustment is completed, if the slide block 2 attempts to move downward due to gravity, it will drive the limiting groove 24 to pull the limiting block 141 downward. However, since the first bolt 14 is in a tightened state and the limiting block 141 is constrained in the limiting groove 24, this movement is effectively prevented. If an external force attempts to push the slide block 2 upward, the upper side wall of the limiting groove 24 will abut against the limiting block 141, and the limiting block 141 is fixed in the first threaded hole 15 by the first bolt 14 and cannot move. Therefore, the slide block 2 also cannot move upward. Therefore, after the height adjustment is completed, the slide block 2 is reliably locked in both directions, and cannot move down or up, thus achieving reliable two-way locking and effectively preventing the sliding door from shifting in height or becoming unstable during operation.

[0036] Guide grooves 12 are provided on both sides of the roller seat 1, and the guide grooves 12 are connected to the slide groove 11. Guide blocks 22 are provided on both sides of the slide seat 2, and the guide blocks 22 are slidably engaged in the guide grooves 12. When the slide seat 2 slides up and down in the slide groove 11 of the roller seat 1 to adjust the height of the sliding door, the guide blocks 22 on both sides of the slide seat 2 slide synchronously in the guide grooves 12 on both sides of the roller seat 1. This structure provides precise constraint on the movement of the slide seat 2, ensuring that it can only make linear reciprocating movements along the extension direction of the slide groove 11, effectively preventing the slide seat 2 from lateral offset, torsion, or tilting during adjustment or operation. The maximum sliding stroke of the guide block 22 relative to the guide groove 12 is less than the maximum sliding stroke of the limit block 141 relative to the limit groove 24. During the entire adjustment process, no matter how the slide seat 2 moves within its allowable stroke due to the raising and lowering of the sliding door, the limit block 141 is always constrained within the physical boundary of the limit groove 24 and will not come out from either end of the limit groove 24. This design effectively prevents the first bolt 14 from falling out of the first threaded hole 15 during adjustment, solving the problem of easy loss of parts in existing technologies. The axis of the first threaded hole 15 is perpendicular to the surface of the inclined portion 21. When the first bolt 14 is tightened, its pushing direction forms a 90-degree angle with the surface of the inclined portion 21. This geometric relationship maximizes the efficiency of force utilization, ensuring that sufficient lifting force is generated with minimal tightening force to overcome the weight of the sliding door during adjustment. The surface of the inclined portion 21 slopes downwards towards the center of the slide block 2. After the hanging wheel structure supports the sliding door, the weight of the sliding door will continuously pull the slide block 2 downwards. This pulling force is transmitted through the slide block 2, ensuring that the inclined surface of the inclined portion 21 is always in close contact with the limiting block 141 at the end of the first bolt 14. When locking is required, tightening the first bolt 14 will cause the pushing limiting block 141 to apply a reverse thrust to the inclined surface. Since the inclined plane slopes inward and downward, this thrust will decompose into a component force that pushes the slide block 2 outward, thereby forcing the slide block 2 to press more tightly against the inner wall of the groove 11 of the roller seat 1, achieving locking and positioning.

[0037] The guide block 22 is fitted inside the slide 2 and is threadedly connected to the slide 2. During installation, the first bolt 14 is screwed into the first threaded hole 15 of the roller seat 1, ensuring that the limiting block 141 at its end is in the correct position. Then, the slide 2 is inserted from the side or end of the roller seat 1, aligning the limiting groove 24 on its inclined portion 21 with and accommodating the limiting block 141. Finally, the guide block 22 is fitted onto the slide 2 and securely fixed with threads, allowing the outer circumferential surface of the guide block 22 to slide against the guide grooves 12 on both sides of the roller seat 1, thus completing the entire motion guiding mechanism. The guide block 22 is a detachable, independent component, reducing the assembly difficulty between the slide 2 and the roller seat 1.

[0038] The first bolt 14 and the limiting block 141 are integrally formed, which enhances the structural strength and reliability and avoids the failure risks such as interface loosening, weld failure or fatigue fracture that may occur due to welding, riveting or threaded connection in the split structure.

[0039] The bottom end of the slide block 2 is provided with a locking block 25. The connecting block 3 includes a horizontal part 31, and the horizontal part 31 has a locking groove 32, which slides in conjunction with the locking block 25. The locking block 25 has a through groove 26, and a second bolt 23 is provided in the through groove 26. The length of the second bolt 23 is greater than the length of the through groove 26. A second threaded hole 311 is provided on one side of the horizontal part 31 for threaded connection with the second bolt 23. During assembly, the locking groove 32 of the connecting block 3 is aligned with the locking block 25 and slid in along its width direction to achieve quick positioning and connection between the two. Then, the second bolt 23 is inserted laterally into the through groove 26 on the locking block 25, and one end is screwed into the second threaded hole 311 on the side wall of the horizontal part 31. Since the total length of the second bolt 23 is greater than the length of the through groove 26, when the second bolt 23 is tightened, its head will abut against one end of the side wall of the through groove 26, while the threaded end will be pulled towards the second threaded hole 311, thereby pressing the connecting block 3 firmly onto the slide block 2 through the pulling force.

[0040] Each of the opposite side walls of the roller support 1 is equipped with a roller shaft 13. The inner wall of the roller shaft 13 is threaded, and the roller shaft 13 is used to install rollers. When installing rollers, the rollers are fitted onto the outer circumference of the roller shaft 13. Then, fasteners are inserted from one side of the roller, passing through the center hole of the roller and screwed into the internal thread of the roller shaft 13. By tightening the fasteners, their heads are pressed against the side of the roller, thereby axially fixing the rollers to the roller shaft 13. This installation method facilitates the individual replacement and maintenance of the rollers, improving the practicality and maintainability of the entire roller structure.

[0041] Specifically, the working principle of this invention is as follows: The hanging wheel structure enables active adjustment of the sliding door height via the first bolt 14. When the sliding door needs to be raised, the first bolt 14 is tightened, and the integrally formed limiting block 141 at its end is pushed forward and acts on the side wall of the limiting groove 24 of the inclined part 21 on the slide block 2. Since the surface of the inclined part 21 is inclined from top to bottom towards the center of the slide block 2, and the axis of the first threaded hole 15 is perpendicular to this inclined surface, the thrust can be efficiently decomposed, forcing the slide block 2 to slide upward in the slide groove 11 of the hanging wheel seat 1, thereby driving the sliding door to rise. When the sliding door height needs to be lowered, the first bolt 14 is loosened, and the slide block 2 slides downward along the slide groove 11 under the action of the sliding door's own weight. After adjustment, if the slide 2 attempts to move downward due to gravity, it will pull the limiting block 141 downward through the limiting groove 24. However, since the first bolt 14 has been tightened and the limiting block 141 is constrained within the limiting groove 24, the movement is prevented. If an external force attempts to push the slide 2 upward, the upper side wall of the limiting groove 24 will abut against the limiting block 141, and the limiting block 141 is fixed in the first threaded hole 15 and cannot move backward. Therefore, the slide 2 can neither move downward nor upward, achieving bidirectional locking.

[0042] Throughout the adjustment process, the maximum sliding stroke of the guide block 22 relative to the guide groove 12 is designed to be less than the maximum sliding stroke of the limit block 141 relative to the limit groove 24. This dimensional relationship ensures that no matter how the slide block 2 moves, the limit block 141 is always constrained within the limit groove 24, thereby effectively preventing the first bolt 14 from completely coming out of the first threaded hole 15 and solving the problem of easy loss of the adjusting bolt.

[0043] During the up-and-down sliding of the slide block 2, the guide blocks 22 on both sides of it always slide and engage within the guide grooves 12 that connect the roller seat 1 to the slide groove 11. This structure provides precise linear guidance for the movement of the slide block 2, effectively preventing lateral deviation, torsion, or jamming. At the same time, under the action of the sliding door's gravity, the inclined surface of the inclined part 21 always remains in close contact with the limiting block 141 of the first bolt 14, providing a favorable pre-tightening state for locking.

[0044] The locking block 25 at the bottom of the slide block 2 and the locking groove 32 on the horizontal part 31 of the connecting block 3 form a sliding fit pair, allowing the connecting block 3 to quickly slide in from the side to complete the initial positioning. Subsequently, the second bolt 23 is inserted laterally into the through groove 26 of the locking block 25, and one end is screwed into the second threaded hole 311 of the horizontal part 31. Since the length of the second bolt 23 is greater than the length of the through groove 26, a tension force will be generated after tightening, which will firmly lock the connecting block 3 onto the slide block 2, achieving a combination of quick installation and strong fastening. Finally, the roller is axially fixed by fasteners passing through the center of the roller from one side and screwed into the thread inside the hanging wheel shaft 13, which is fitted on both sides of the hanging wheel seat 1. This completes the assembly of the entire hanging wheel structure.

[0045] In summary, this utility model solves the problem that in existing hanging wheel structures, the sliding block can still move upward under external force after the height adjustment is completed, resulting in unstable sliding door height and easy deviation.

[0046] It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information. In addition, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A roller structure for adjusting the height of a sliding door, comprising a roller seat (1), wherein the roller seat (1) has a groove (11) extending along its height direction, a slide block (2) is slidably fitted within the groove (11), and a connecting block (3) for connecting the sliding door is installed at the bottom end of the slide block (2), characterized in that, The slide block (2) has an inclined part (21) on one side, and the inclined part (21) has a limiting groove (24). The wheel seat (1) has a first threaded hole (15) on one side, which is connected to the slide groove (11). A first bolt (14) is threaded in the first threaded hole (15), and a limiting block (141) is provided at one end of the first bolt (14). The sliding fit is in the limiting groove (24).

2. The hanging wheel structure for adjusting the height of a sliding door according to claim 1, characterized in that, The roller seat (1) has guide grooves (12) on both sides, and the guide grooves (12) are connected to the slide groove (11). The slide seat (2) has guide blocks (22) on both sides, and the guide blocks (22) slide in the guide grooves (12).

3. The hanging wheel structure for adjusting the height of a sliding door according to claim 2, characterized in that, The maximum sliding stroke of the guide block (22) relative to the guide groove (12) is less than the maximum sliding stroke of the limiting block (141) relative to the limiting groove (24).

4. The hanging wheel structure for adjusting the height of a sliding door according to claim 1, characterized in that, The axis of the first threaded hole (15) is perpendicular to the surface of the inclined portion (21).

5. The hanging wheel structure for adjusting the height of a sliding door according to claim 2, characterized in that, The guide block (22) is sleeved inside the slide (2), and the guide block (22) is threadedly connected to the slide (2).

6. The hanging wheel structure for adjusting the height of a sliding door according to claim 1, characterized in that, The surface of the inclined portion (21) is inclined from top to bottom toward the center of the slide (2).

7. The hanging wheel structure for adjusting the height of a sliding door according to claim 1, characterized in that, The first bolt (14) and the limiting block (141) are integrally formed.

8. The hanging wheel structure for adjusting the height of a sliding door according to claim 1, characterized in that, The bottom end of the slide block (2) is provided with a locking block (25), and the connecting block (3) includes a horizontal part (31). The horizontal part (31) has a locking groove (32), and the locking groove (32) slides in cooperation with the locking block (25).

9. A hanging wheel structure for adjusting the height of a sliding door according to claim 8, characterized in that, The card block (25) has a through slot (26), and a second bolt (23) is provided in the through slot (26). The length of the second bolt (23) is greater than the length of the through slot (26). A second threaded hole (311) is provided on one side of the horizontal part (31) to be threadedly connected to the second bolt (23).

10. A hanging wheel structure for adjusting the height of a sliding door according to claim 1, characterized in that, The roller seat (1) has roller shafts (13) on both sides of its opposite side walls. The inner wall of the roller shaft (13) is threaded and the roller shaft (13) is used to install rollers.

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