Dual-purpose sliding door pulley block capable of being installed in open mode and in concealed mode

Abstract

A dual-purpose sliding door pulley block capable of being installed in an exposed mode and a concealed mode comprises a bottom plate, a pulley seat is installed on the outer side face of the bottom plate, a roller is installed on the pulley seat in a rotating mode, and the outer circle of the roller protrudes out of the lower end face of the pulley seat. A plurality of mounting holes are formed in the two sides of the bottom plate, and fixing screws penetrate through the mounting holes to be connected with the sliding door; the bottom plate is further provided with a supporting plate, and the supporting plate extends towards the inner side face of the bottom plate. The utility model has the beneficial effects that the bottom plate can be directly fixed on a door body through the mounting holes during surface mounting, and the rollers protrude out of the lower end surface of the pulley seat and are matched with a track to realize a sliding function. During concealed installation, the pulley seat is embedded into an installation hole in the sliding door, the bottom plate covers the interior or the back face of the door body and is fixed to the door body through the installation hole, and the idler wheel can still be in contact with a rail through an opening of the door body. The arrangement of the mounting holes provides flexible fixing points, so that the same pulley block can adapt to two mounting modes, and additional structural adjustment is not needed.

Description

Technical Field

[0001] This utility model relates to a hardware accessory, specifically a sliding door pulley assembly that can be used for both surface and concealed installation. Background Technology

[0002] Sliding door pulley systems are mechanical components widely used in modern furniture design and architecture, primarily for enabling smooth, horizontal sliding of doors. Typical applications include wardrobes, cabinets, and interior partitions. Through the cooperation of the rollers and tracks in the pulley system, users can easily push and pull the door with minimal force, thus improving convenience and space utilization. Sliding door pulley systems typically consist of a base plate, pulley seats, and rollers, with the rollers rolling on the tracks being crucial for achieving the sliding function.

[0003] However, in the existing technology, the installation methods of sliding door pulley systems are mainly divided into two types: surface mounting and concealed mounting.

[0004] Surface mounting refers to fixing the pulley assembly directly to the outer surface of the sliding door. Typically, the pulley assembly is attached to the outside of the door using screws or other fasteners, allowing the rollers to contact the top or bottom track. This installation method is convenient and intuitive, suitable for scenarios where aesthetics are not a primary concern. However, because the pulley assembly is exposed, its appearance is more prominent, potentially affecting the overall aesthetics of the design, especially in modern applications where harmony with home décor is emphasized.

[0005] Concealed installation hides the pulley assembly inside or on the back of the sliding door for a cleaner look. This typically requires drilling holes in the sliding door to embed the pulley assembly inside or through a concealed structure on the back of the door that works with the track. The advantage of concealed installation is that the pulley assembly is invisible, enhancing the door's aesthetics and the overall design's fluidity. However, the installation process is more complex; drilling holes not only increases construction difficulty but may also weaken the door's structure, affecting its strength and durability.

[0006] Although the two installation methods mentioned above each have their applicable scenarios, existing sliding door pulley systems generally have significant limitations, specifically in the following aspects:

[0007] 1. Lack of versatility: Current sliding door roller assemblies on the market are typically designed for different installation methods, specifically surface-mounted or concealed-mounted, and cannot be used interchangeably between the two. The structural design of surface-mounted roller assemblies, such as exposed fixing points and roller positions, cannot accommodate the concealed requirements of concealed installations; while concealed roller assemblies, due to their embedded design and dependence on door openings, cannot be directly used for surface-mounted installations. This distinction forces users to determine their installation method in advance when selecting roller assemblies. If requirements change, such as from surface-mounted to concealed installation, or vice versa, a different type of roller assembly must be replaced, lacking flexibility.

[0008] 2. Increased manufacturing and inventory costs: Because existing pulley systems need to be divided into exposed and concealed types, manufacturers must design, produce, and maintain two different product lines, significantly increasing R&D and production costs. At the same time, retailers and distributors need to stock both models separately, further increasing the complexity and cost of inventory management. For large-scale production and sales, this non-universal design undoubtedly reduces economic efficiency.

[0009] 3. Limited User Experience: For end users, the non-universality of existing technologies restricts the freedom of installation choices. For example, during renovation, if the installation method needs to be changed due to design adjustments or other reasons, users have to purchase new, compatible pulley sets, increasing usage and time costs. Furthermore, the drilling required for concealed installation may cause irreversible damage to the integrity of the door, making it more difficult for users to switch to surface mounting later. Therefore, further improvements are necessary. Utility Model Content

[0010] The purpose of this utility model is to overcome the shortcomings of existing technologies and provide a sliding door pulley assembly that is simple in structure, easy to use, and highly applicable, and can be used for both surface and concealed installation.

[0011] The purpose of this utility model is achieved in the following way: a sliding door pulley assembly that can be used for both surface mounting and concealed mounting, which includes a base plate, a pulley seat installed on the outer side of the base plate, a roller rotatably mounted on the pulley seat, and the outer circle of the roller protruding from the lower end face of the pulley seat.

[0012] The base plate has several mounting holes on both sides, and fixing screws pass through these mounting holes to connect to the sliding door;

[0013] The base plate is also provided with a support plate, which extends towards the inner side of the base plate.

[0014] Furthermore, the mounting holes are vertically distributed on both sides of the base plate.

[0015] Furthermore, three mounting holes are provided on each side of the base plate, and the mounting holes on both sides are symmetrical.

[0016] Furthermore: the top and bottom of the base plate are respectively provided with an upper mounting plate and a lower mounting plate extending outwards. Several guide columns are vertically installed between the upper mounting plate and the lower mounting plate. A guide plate is provided on the pulley seat. The guide columns pass through the guide holes on the guide plate and are fixedly connected to the pulley seat.

[0017] Furthermore, the pallet and the base plate are integrally stamped from metal sheets.

[0018] Furthermore, the upper mounting plate and lower mounting plate are integrally stamped from metal sheets with the base plate.

[0019] The beneficial effects of this utility model are: 1. Simple structure, low production cost, and improved market competitiveness.

[0020] 2. When surface-mounted, the base plate can be directly fixed to the door body through the mounting holes. The rollers protrude from the lower end face of the pulley seat and cooperate with the track to achieve the sliding function.

[0021] 3. When concealed installation, the pulley bracket is embedded in the mounting holes on the sliding door, and the base plate covers the inside or back of the door body. It is fixed to the door body through the mounting holes, and the rollers can still contact the track through the door opening. The mounting holes provide flexible fixing points, allowing the same pulley assembly to adapt to two installation methods without additional structural adjustments.

[0022] 4. The base plate is equipped with a support plate that extends inward. This feature allows the support plate to serve as an additional support or positioning structure when the door is surface-mounted, fitting into the lower end face of the door to ensure the stability and secureness of the pulley system during concealed installation. Attached Figure Description

[0023] Figure 1 , 2 This is a rendering of the final assembly of this utility model.

[0024] Figure 3 This is a diagram illustrating the effect of the exposed mounting in this utility model.

[0025] Figure 4 This is a diagram illustrating the effect of concealed mounting in this utility model. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings. A sliding door pulley assembly that can be used for both surface mounting and concealed mounting includes a base plate 1, a pulley seat 2 mounted on the outer side of the base plate 1, and a roller 3 rotatably mounted on the pulley seat 2. The outer circle of the roller 3 protrudes from the lower end face of the pulley seat 2.

[0027] The base plate 1 has several mounting holes 4 on both sides, and the fixing screws pass through the mounting holes 4 to connect with the sliding door;

[0028] The base plate 1 is also provided with a support plate 5, which extends toward the inner side of the base plate 1.

[0029] In one embodiment, the mounting holes 4 are vertically distributed on both sides of the base plate 1.

[0030] In one embodiment, three mounting holes 4 are provided on each side of the base plate 1, and the mounting holes 4 on both sides are symmetrical.

[0031] In one embodiment, the top and bottom of the base plate 1 are respectively provided with an upper mounting plate 6 and a lower mounting plate 7 extending outwards. A plurality of guide posts 8 are vertically installed between the upper mounting plate 6 and the lower mounting plate 7. A guide plate 9 is provided on the pulley seat 2. The guide posts 8 pass through the guide holes on the guide plate 9 and are fixedly connected to the pulley seat 2.

[0032] In one embodiment, the pallet 5 and the base plate 1 are integrally stamped from metal sheets.

[0033] In one embodiment, the upper mounting plate 6 and the lower mounting plate 7 are integrally stamped from metal sheets with the base plate 1.

[0034] Working principle: The sliding door pulley system of this invention achieves horizontal movement of the sliding door through the cooperation of rollers 3 and the track. Its working principle differs slightly between surface-mounted and concealed-mounted installation methods, but the core mechanism remains the same.

[0035] The roller 3 is rotatably mounted on the pulley seat 2, with its outer circle protruding from the lower end face of the pulley seat 2. When the pulley assembly is fixed to the sliding door, the roller 3 contacts the track installed on the top of the door frame or the ground. When the user pushes or pulls the door, the roller 3 rolls on the track, thereby driving the sliding door to move horizontally, realizing the function of opening or closing the door.

[0036] When this product is installed in a surface-mounted scenario, the bottom of the sliding door rests on a support plate, which serves as the main load-bearing element. The base plate 1 is directly fixed to the sliding door using screws through the mounting holes 4 on both sides. The support plate significantly reduces the load on the mounting holes, preventing the screws from easily loosening. Simultaneously, the pulley seat 2 is located on the outer side of the base plate 1, and the roller 3 protrudes from the lower end of the pulley seat 2, naturally contacting the track. When the user pushes or pulls the door, the roller 3 rolls on the track, smoothly moving the door. In this installation scenario, the flexible design of the mounting holes 4 makes the surface-mounting process simple and quick; users only need standard tools to complete the fixing without additional structural adjustments. This simplicity significantly improves installation efficiency, making it particularly suitable for scenarios requiring high construction speed.

[0037] In concealed installation scenarios, mounting holes are made on the sliding door, allowing the pulley seats of the pulley block to be embedded within these holes. The base plate covers both sides of the mounting holes and is fixed to the sliding door via mounting holes 4. Therefore, whether used in a surface-mounted or concealed installation, the base plate is fixed to the sliding door through the mounting holes. This versatility eliminates the limitations of existing technologies that require different models for surface-mounted and concealed installations. Users do not need to purchase different models for different installation methods, significantly reducing usage costs and increasing flexibility. Furthermore, the mounting holes 4 are arranged vertically along the base plate 1 and are symmetrical, ensuring even force on the fixing screws, making both surface-mounted and concealed installation processes quick and secure. No professional skills or complex tools are required, significantly improving the user experience.

[0038] Furthermore, in this case, the support plate 5, upper mounting plate 6, lower mounting plate 7, and base plate 1 are integrally stamped from metal sheets. This process eliminates weak points in welding or assembly, improves the overall strength and service life of the pulley system, ensures stable performance during long-term use, and is also convenient and quick to process, effectively reducing production costs.

[0039] In summary, this invention achieves smooth sliding door movement and versatility for both installation methods through the mounting holes 4 in the base plate 1, the supporting function of the support plate 5, and the adjustment mechanism of the pulley seat 2. Compared to existing technologies, this invention eliminates the need to distinguish between surface-mounted and concealed-mounted models, and eliminates the need for additional holes in the door body, simplifying the installation process and improving the durability and economy of the structure. Its technical advantages not only optimize the user experience but also bring significant competitive advantages to manufacturers and the market, thus it can be widely promoted and used.

[0040] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of the claims of this utility model.

Claims

1. A sliding door pulley assembly for surface and concealed installation, characterized in that: It includes a base plate (1), a pulley seat (2) is installed on the outer side of the base plate (1), and a roller (3) is rotatably installed on the pulley seat (2). The outer circle of the roller (3) protrudes from the lower end face of the pulley seat (2). The base plate (1) has several mounting holes (4) on both sides, and the fixing screws pass through the mounting holes (4) to connect with the sliding door; The base plate (1) is also provided with a support plate (5), which extends toward the inner side of the base plate (1).

2. The sliding door pulley assembly of claim 1, wherein: The mounting holes (4) are vertically distributed on both sides of the base plate (1).

3. The two-purpose sliding door pulley set of claim 2, wherein: The mounting holes (4) are provided in three on each side of the base plate (1), and the mounting holes (4) on both sides are symmetrical.

4. The two-purpose sliding door pulley set of claim 1, wherein: The top and bottom of the base plate (1) are respectively provided with an upper mounting plate (6) and a lower mounting plate (7) extending outwards. Several guide columns (8) are vertically installed between the upper mounting plate (6) and the lower mounting plate (7). A guide plate (9) is provided on the pulley seat (2). The guide columns (8) pass through the guide holes on the guide plate (9) and are fixedly connected to the pulley seat (2).

5. The two-purpose sliding door pulley set according to claim 1, wherein: The pallet (5) and the base plate (1) are integrally stamped from metal sheets.

6. The overhead and underhead double door pulley assembly of claim 4, wherein: The upper mounting plate (6) and lower mounting plate (7) and the base plate (1) are integrally stamped from metal sheets.

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