Lower wheel assembly of sliding door

Abstract

A lower wheel assembly of a sliding door comprises an outer cover plate and an inner cover plate, the upper end and the lower end of the outer cover plate are bent inwards to be provided with an upper installation plate and a lower installation plate, a movable groove is defined by the upper installation plate and the lower installation plate, and the inner cover plate is installed in the movable groove in an up-down sliding mode through a guide column. The height adjusting mechanism penetrates through the upper mounting plate and is connected to the inner cover plate in an abutting mode, and the height of the inner cover plate is adjusted. A lower guide wheel is mounted on the inner cover plate; a locking mechanism is arranged in the movable groove and comprises an elastic piece fixed in the movable groove, the end face of the elastic piece protrudes to form a limiting boss, correspondingly, a driving plate is arranged on the inner cover plate, the driving plate is clamped on the limiting boss, and the position of the lower guide wheel in the outer cover plate is locked. The sliding door has the advantages that the locking mechanism is arranged to lock the height of the lower wheel assembly, the installation height of the sliding door is reduced, and the sliding door is more convenient to install.

Description

Technical Field

[0001] This utility model relates to a sliding door guide wheel, specifically a lower wheel assembly for a sliding door. Background Technology

[0002] A sliding door consists of two door panels, front and back, suspended from upper and lower tracks by upper and lower rollers for opening and closing. Rollers are installed at the top and bottom of each door panel, and the sliding and guiding motion is achieved through the interaction of the rollers and tracks. Traditional sliding door installation first involves installing the upper rollers, then tilting the door panel to insert the lower rollers into the lower guide rail. Because the lower rollers are already connected to the door panel before installation and protrude from the bottom surface, installers need to repeatedly test the overall angle of the door panel to align the rollers with the track in confined spaces, making the work difficult. To address this drawback, lower rollers utilize springs or other return mechanisms to pop out and reset after the door panel is installed, ensuring normal sliding. However, in existing technology, springs or single reset mechanisms are not sufficiently stable. Insufficient elasticity or inaccurate pop-out positioning may result in the lower rollers not fully embedding into the guide rail or not forming a tight connection, thus affecting the normal installation and use of the door. Therefore, further improvements are necessary. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of existing technologies and provide a lower wheel assembly for a sliding door that is simple in structure, low in manufacturing cost, and easy and convenient to install and operate.

[0004] The purpose of this utility model is achieved in the following way: a lower wheel assembly for a sliding door, comprising an outer cover plate and an inner cover plate, wherein the upper and lower ends of the outer cover plate are bent inward to form an upper mounting plate and a lower mounting plate, and the upper mounting plate and the lower mounting plate together form a movable groove, the inner cover plate is slidably installed in the movable groove through guide posts, and a height adjustment mechanism passes through the upper mounting plate and is pressed against the inner cover plate to adjust the height of the inner cover plate; a lower guide wheel is installed on the inner cover plate;

[0005] The movable groove is provided with a locking mechanism, which includes an elastic piece fixed in the movable groove, and a limiting boss formed by protruding end face of the elastic piece. Correspondingly, a drive plate is provided on the inner cover plate, and the drive plate is locked on the limiting boss to lock the position of the lower guide wheel in the outer cover plate.

[0006] The movable groove is provided with two buckles bent inward from the outer cover plate body. Correspondingly, buckle plates are provided on both sides of the elastic sheet. The buckle plates are installed in the buckles to fix the elastic sheet to the outer cover plate.

[0007] The limiting boss has deformation grooves on both sides of the elastic sheet.

[0008] The deformation groove is a structure with a long waist-shaped through groove arranged vertically.

[0009] The outer cover plate is provided with a clearance groove at the position of the limiting boss, and the clearance groove penetrates through the body of the outer cover plate.

[0010] The elastic sheet and the limiting boss are integrally stamped from a metal sheet.

[0011] The limiting boss is a spherical protrusion that protrudes from the end face of the elastic sheet.

[0012] The inner cover plate has connecting plates and a bottom plate bent inward at the upper and lower ends. The guide post passes through the connecting plate and the bottom plate and is connected to the upper mounting plate and the lower mounting plate of the outer cover plate. The guide post is fitted with a spring, which generates a downward pushing force to push the inner cover plate downward.

[0013] The height adjustment mechanism includes an adjustment screw, which is screwed onto the upper mounting plate and its lower end presses against the drive plate.

[0014] The height adjustment mechanism also includes a locking nut fitted on the adjusting screw, with the lower end face of the locking nut pressing against the upper mounting plate.

[0015] The outer cover plate has a first drive groove at the position of the upper and lower guide wheels, and a second drive groove at the position of the connecting plate or the bottom plate. The first drive groove and the second drive groove penetrate the body of the outer cover plate.

[0016] The beneficial effects of this utility model are: 1. Simple structure, low manufacturing cost, and improved market competitiveness.

[0017] 2. A locking mechanism is installed to lock the lower wheel assembly at a certain height, reducing the installation height of the sliding door and making the installation of the sliding door more convenient.

[0018] 3. After the door body is installed, the lower guide wheel is reset using springs and guide posts to ensure that the lower guide wheel can pop out normally, thus ensuring that the sliding door can work normally and stably.

[0019] 4. The cooperation between the elastic plate and the limiting boss ensures that the guide wheel can be stably locked after retraction, preventing the guide wheel from popping out when not in operation, making the installation process stable and efficient.

[0020] 5. The outer cover plate is provided with a first drive groove and a second drive groove. When this pulley block is installed in a concealed manner, the inner cover plate can also be pried and reset through the first drive groove or the second drive groove, which facilitates the concealed installation of this product. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the installation state of the lower guide wheel in this utility model.

[0022] Figure 2 , 3 This is a schematic diagram of the working state of the lower guide wheel in this utility model.

[0023] Figure 4 This is an exploded view of the structure of this utility model.

[0024] Figure 5 This is a schematic diagram of the elastic sheet in this utility model.

[0025] Figure 6 This is a schematic diagram of the structure of the lower guide wheel and guide post in this utility model.

[0026] Figure 7 This is a diagram illustrating the effect of concealed installation of the structure of this utility model. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings. A lower wheel assembly for a sliding door includes an outer cover plate 2 and an inner cover plate 3. The upper and lower ends of the outer cover plate 2 are bent inwards to provide an upper mounting plate 21 and a lower mounting plate 22. The upper mounting plate 21 and the lower mounting plate 22 together form a movable groove 23. The inner cover plate 3 is slidably installed in the movable groove 23 via guide posts 4. A height adjustment mechanism passes through the upper mounting plate 21 and is pressed against the inner cover plate 3 to adjust the height of the inner cover plate 3. A lower guide wheel 1 is installed on the inner cover plate 3.

[0028] The movable groove 23 is provided with a locking mechanism, which includes an elastic piece 5 fixed in the movable groove 23, and a limiting boss 51 is formed by protruding the end face of the elastic piece 5. Correspondingly, a driving plate 31 is provided on the inner cover plate 3. The driving plate 31 is locked on the limiting boss 51 to lock the position of the lower guide wheel 1 in the outer cover plate 2.

[0029] The movable groove 23 has two buckles 24 bent inward from the outer cover plate 2 body. Correspondingly, buckle plates 52 are provided on both sides of the elastic sheet 5. The buckle plates 52 are snapped into the buckles 24 to fix the elastic sheet 5 to the outer cover plate 2.

[0030] The limiting boss 51 has deformation grooves 53 on both sides of the elastic sheet 5.

[0031] The deformation groove 53 is a structure with a long waist-shaped through groove arranged vertically.

[0032] The outer cover plate 2 is provided with a clearance groove 25 at the position corresponding to the limiting boss 51, and the clearance groove 25 penetrates the body of the outer cover plate 2.

[0033] The elastic sheet 5 and the limiting boss 51 are integrally stamped from metal sheet.

[0034] The limiting boss 51 is a spherical protrusion that protrudes from the end face of the elastic sheet 5.

[0035] The inner cover plate 3 has a connecting plate 32 and a bottom plate 33 bent inward at the upper and lower ends. The guide post 4 passes through the connecting plate 32 and the bottom plate 33 and is connected to the upper mounting plate 21 and the lower mounting plate 22 of the outer cover plate 2. The guide post 4 is fitted with a spring 41, which generates a downward pushing force to push the inner cover plate 3 downward.

[0036] The height adjustment mechanism includes an adjustment screw 6, which is screwed onto the upper mounting plate 21, and its lower end presses against the drive plate 31.

[0037] The height adjustment mechanism also includes a locking nut 61 fitted on the adjusting screw 6, with the lower end face of the locking nut 61 pressing against the upper mounting plate 21.

[0038] The outer cover plate 2 has a first drive groove 26 at the position corresponding to the lower guide wheel 1, and a second drive groove 27 at the position corresponding to the connecting plate 32 or the bottom plate 33. The first drive groove 26 and the second drive groove 27 are provided through the body of the outer cover plate 2.

[0039] Working principle: Before installing the lower wheel assembly, the lower guide wheel is lifted by the locking mechanism, so that the lower guide wheel is hidden inside the outer cover plate. This avoids the increase in the height of the sliding door caused by the traditional lower wheel assembly protruding from the bottom, which would increase the installation difficulty.

[0040] Specifically, in this case, the upper and lower mounting plates of the outer cover plate form a movable groove. The locking mechanism includes an elastic piece fixed in the movable groove. A limiting boss is formed on the end face of the elastic piece. Corresponding to the position of the limiting boss, a drive plate is provided on the inner cover plate. When the inner cover plate slides up along the guide post to the limiting boss, the drive plate is locked above the limiting boss, the lower guide wheel is lifted, and the position of the lower guide wheel inside the outer cover plate is locked. When the sliding door is installed, when the inner cover plate slides down along the guide post to below the limiting boss, the drive plate is locked below the limiting boss, the lower guide wheel is lowered, and the height of the lower guide wheel is locked.

[0041] The limiting boss is located in the elastic plate, and deformation grooves are opened on both sides of the limiting boss through the elastic plate. The deformation grooves provide sufficient deformation space, so that the limiting boss can deform when it is squeezed by the drive plate. This facilitates the hooking and unhooking of the limiting boss and the drive plate, and improves the stability and ease of operation of the locking mechanism.

[0042] Furthermore, the cooperation between the limiting boss and the drive plate ensures the stability of the inner cover plate during operation. When the limiting boss is reset, the elastic plate can quickly reset, driving the limiting boss to reset precisely, providing sufficient elastic support for the limiting boss, and ensuring that the inner cover plate can be stably maintained in the inward or outward state.

[0043] In order to further improve the smoothness of the lower guide wheel's return, a spring is fitted on the outside of the guide post in this case. The downward thrust generated by the spring pushes the guide post to move the inner cover plate downward, so that the lower guide wheel can be ejected smoothly and smoothly embedded in the guide rail, thereby completing the reset operation of the lower wheel assembly and making its reset operation stable and smooth.

[0044] It should be noted that the aforementioned elastic sheet and limiting boss are integrally stamped from metal sheet, which not only greatly improves the strength and durability of the lower wheel assembly, but also has a simple structure, low manufacturing cost, and can ensure the stable operation of the lower wheel assembly during long-term use.

[0045] In this case, a height adjustment mechanism is also used to fine-tune the overall height of the inner cover plate, ensuring precise matching between the lower wheel assembly and the guide rail, so that the lower wheel assembly reaches the ideal working state, improving the installation accuracy of the sliding door. The height adjustment process is simple and convenient, adapting to the installation needs of different scenarios and different types of sliding doors.

[0046] like Figure 7 As shown, this pulley assembly is suitable for surface mounting, where the inner cover plate faces inwards towards the cabinet. It can also be used in concealed mounting scenarios, where a mounting groove 71 is created on the cabinet door 7, the inner cover plate is embedded in the groove 71, and the outer cover plate 2 covers the groove. In this case, after installation, when the user needs to remove the lower guide wheel, they only need to insert a screwdriver 72 or other tool into the first or second drive groove to pry the inner cover plate, causing it to disengage from the limiting boss. This forces the inner cover plate to slide down along the guide post to below the limiting boss, where the drive plate is then locked below the limiting boss. The lower guide wheel then lowers and its height is locked, thus solving the technical problem of not being able to release the lower guide wheel when the pulley assembly is concealed. Therefore, it can be widely used.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A lower wheel assembly for a sliding door, characterized in that: It includes an outer cover plate (2) and an inner cover plate (3). The upper and lower ends of the outer cover plate (2) are bent inward and provided with an upper mounting plate (21) and a lower mounting plate (22). The upper mounting plate (21) and the lower mounting plate (22) together form a movable groove (23). The inner cover plate (3) is slidably installed in the movable groove (23) through a guide post (4). The height adjustment mechanism passes through the upper mounting plate (21) and is pressed against the inner cover plate (3) to adjust the height of the inner cover plate (3). The inner cover plate (3) is equipped with a lower guide wheel (1). The movable groove (23) is provided with a locking mechanism, which includes an elastic piece (5) fixed in the movable groove (23), and a limiting boss (51) is formed by protruding the end face of the elastic piece (5). Correspondingly, a drive plate (31) is provided on the inner cover plate (3). The drive plate (31) is locked on the limiting boss (51) to lock the position of the lower guide wheel (1) in the outer cover plate (2).

2. The lower wheel assembly of a sliding door according to claim 1, characterized in that: The movable groove (23) is provided with two buckles (24) bent inward from the body of the outer cover plate (2). Correspondingly, buckle plates (52) are provided on both sides of the elastic sheet (5). The buckle plates (52) are installed in the buckles (24) to fix the elastic sheet (5) on the outer cover plate (2).

3. The lower wheel assembly of a sliding door according to claim 1, characterized in that: The limiting boss (51) has deformation grooves (53) on both sides of the elastic sheet (5), and the deformation grooves (53) are vertically arranged with long waist-shaped through grooves.

4. The lower wheel assembly of a sliding door according to claim 2, characterized in that: The outer cover plate (2) is provided with a clearance groove (25) at the position corresponding to the limiting boss (51), and the clearance groove (25) penetrates the body of the outer cover plate (2).

5. The lower wheel assembly of a sliding door according to any one of claims 1-3, characterized in that: The elastic sheet (5) and the limiting boss (51) are integrally stamped from metal sheet.

6. The lower wheel assembly of a sliding door according to claim 1, characterized in that: The limiting boss (51) is a spherical protrusion that protrudes from the end face of the elastic sheet (5).

7. The lower wheel assembly of a sliding door according to claim 1, characterized in that: The inner cover plate (3) has a connecting plate (32) and a bottom plate (33) bent inward at the upper and lower ends. The guide post (4) passes through the connecting plate (32) and the bottom plate (33) and is connected to the upper mounting plate (21) and the lower mounting plate (22) of the outer cover plate (2). The guide post (4) is fitted with a spring (41), which generates a downward pushing force to push the inner cover plate (3) downward.

8. The lower wheel assembly of a sliding door according to claim 1, characterized in that: The height adjustment mechanism includes an adjustment screw (6), which is screwed onto the upper mounting plate (21), and its lower end presses against the drive plate (31).

9. The lower wheel assembly of a sliding door according to claim 8, characterized in that: The height adjustment mechanism also includes a locking nut (61) fitted on the adjusting screw (6), with the lower end face of the locking nut (61) pressing against the upper mounting plate (21).

10. The lower wheel assembly of a sliding door according to claim 7, characterized in that: The outer cover plate (2) is provided with a first drive groove (26) corresponding to the position of the lower guide wheel (1), and a second drive groove (27) is provided corresponding to the position of the connecting plate (32) or the bottom plate (33). The first drive groove (26) and the second drive groove (27) penetrate the body of the outer cover plate (2).

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