Drawer guide rail

Abstract

A drawer guide rail comprises an inner rail body and an outer rail body, the inner rail body comprises a connecting part and a supporting part arranged at the top of the connecting part, the section of the supporting part is in a triangular shape with the wide upper portion and the narrow lower portion, the left side and the right side of the supporting part are symmetrically concaved inwards to form guide grooves, the outer rail body is in an open groove shape with an open bottom, and the outer rail body is sleeved on the surface of the inner rail body. A guide groove is formed in the outer rail, a ball frame is arranged between the outer rail and the inner rail, a roller pin is arranged in the ball frame, a limiting groove is formed in the position, opposite to the guide groove, in the outer rail, and balls are arranged on the two sides of the ball frame and roll between the guide groove and the limiting groove. The inner rail has the beneficial effects that the supporting part of the inner rail adopts the triangular section design with the wide upper part and the narrow lower part, and the guide grooves are symmetrically formed in the left side and the right side of the supporting part. By means of the design, the balls can stably roll between the guide grooves and the limiting grooves of the outer rail, and it is ensured that the guidance quality of the drawer in the sliding process is greatly improved.

Description

Technical Field

[0001] The utility model relates to a hardware fitting, in particular to a drawer guide rail. Background Art

[0002] Drawer guide rails are indispensable functional components in modern furniture and are widely used in drawer systems of various types of furniture such as home and office furniture. The main function of a drawer guide rail is to support the drawer and enable the drawer to move smoothly and smoothly when opening and closing through a sliding device. Common drawer guide rails are composed of an inner rail, an outer rail and rolling devices such as ball bearings and needle bearings. The inner rail is usually installed on the drawer, the outer rail is fixed inside the drawer cabinet, and the rolling device is arranged between the inner rail and the outer rail to reduce friction.

[0003] However, in the prior art, the design of many drawer guide rails only relies on the rolling of ball bearings or needle bearings to achieve the sliding of the drawer. The guiding performance of such a guide rail system is poor, and problems such as deviation and jamming are likely to occur during the sliding process. Especially after long-term use, due to the wear of the rolling device and the deformation of the guide rail, the smoothness and stability of the drawer sliding will be further reduced, affecting the user experience. Therefore, it is necessary to make further improvements to it. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the defects existing in the prior art and provide a drawer guide rail with a simple structure, convenient use, which can significantly improve the guiding property and sliding stability of the drawer guide rail, and at the same time simplifies the production and assembly process and reduces the production cost.

[0005] The purpose of the utility model is realized in the following way: A drawer guide rail, which includes an inner rail and an outer rail. The inner rail includes a connecting part and a supporting part arranged at its top. The cross-section of the supporting part is in a triangular shape with a wider top and a narrower bottom. A sliding plane is arranged at the top of the supporting part. Guide grooves are symmetrically recessed inward on the left and right sides of the supporting part. The outer rail is in an open groove shape with an open bottom, and the outer rail is sleeved on the surface of the inner rail. A ball holder is arranged between the outer rail and the inner rail. Needle bearings are arranged in the ball holder and roll on the sliding plane. Limiting grooves are arranged at positions in the outer rail corresponding to the guide grooves. Ball bearings are arranged on both sides of the ball holder, and the ball bearings roll between the guide grooves and the limiting grooves.

[0006] Furthermore: The supporting part is made by bending the top plate of the connecting part, and the free end of the supporting part overlaps with the side wall of the connecting part.

[0007] Furthermore: A base part extends laterally at the bottom of the connecting part, and the base part is connected to the mounting seat.

[0008] Further: The mounting base is connected to the bottom of the base part, and the two are riveted and fixed together by rivets.

[0009] Further: A reinforcing plate extends upward from the free end of the base part.

[0010] The beneficial effects of the present utility model are as follows: 1. The structure is simple, the production cost is low, and the market competitiveness is improved.

[0011] 2. In the present utility model, the supporting part of the inner rail is designed with a triangular cross-section that is wider at the top and narrower at the bottom, and guiding grooves are symmetrically arranged on the left and right sides of the supporting part. This design enables the balls to roll smoothly between the guiding grooves and the limiting grooves of the outer rail, ensuring a significant improvement in the guiding performance during the sliding process of the drawer. The needle rollers roll on the sliding plane, further reducing friction and improving the smoothness and stability of the sliding. This structure effectively avoids the problems of deviation or jamming during the sliding process of the drawer, enhancing the user experience.

[0012] 3. The supporting part in the present utility model is made by bending the top plate of the connecting part, and the free end of the supporting part overlaps with the side wall of the connecting part. This integrated design reduces the number of independent parts and simplifies the production process. Compared with traditional guide rails, the present utility model reduces complex component assembly and processing steps, lowering the production cost. At the same time, due to the simplified component structure, the assembly process is also more convenient, improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the overall assembly effect diagram of the present utility model.

[0014] Figure 2 、 3 is the structural exploded view of the present utility model.

[0015] Figure 4 is the structural cross-sectional view of the present utility model.

[0016] Figure 5 is the schematic diagram of the inner rail structure in the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present utility model will be further specifically described below in conjunction with the accompanying drawings. A drawer guide rail, which comprises an inner rail 1 and an outer rail 2. The inner rail 1 comprises a connecting portion 11 and a supporting portion 12 arranged at the top thereof. The cross-section of the supporting portion 12 is in a triangular shape with a wider top and a narrower bottom. A sliding plane 13 is arranged at the top of the supporting portion 12. Guide grooves 16 are symmetrically formed by inward depressions on the left and right sides of the supporting portion 12. The outer rail 2 is in the shape of an open groove with an open bottom, and the outer rail 2 is sleeved on the surface of the inner rail 1. A ball holder 3 is arranged between the outer rail 2 and the inner rail 1. Needle rollers 31 are arranged in the ball holder 3, and the needle rollers 31 roll on the sliding plane 13. Limiting grooves 21 are arranged at positions corresponding to the guide grooves 16 inside the outer rail 2. Ball bearings 32 are arranged on both sides of the ball holder 3, and the ball bearings 32 roll between the guide grooves 16 and the limiting grooves 21.

[0018] In one embodiment, the supporting portion 12 is made by bending the top plate of the connecting portion 11, and the free end of the supporting portion 12 overlaps with the side wall of the connecting portion 11.

[0019] In one embodiment, a base portion 14 is further laterally extended at the bottom of the connecting portion 11, and the base portion 14 is connected to the mounting seat 4.

[0020] In one embodiment, the mounting seat 4 is connected to the bottom of the base portion 14, and the two are riveted and fixed together by rivets.

[0021] In one embodiment, a reinforcing plate 15 extends upward from the free end of the base portion 14.

[0022] Working principle: The present utility model provides an improved drawer guide rail system, which is mainly composed of components such as an inner rail, an outer rail, ball bearings, needle rollers and a ball holder. The interaction between these components ensures that the drawer can slide smoothly and stably, and provides reliable limiting and support in the guide rail system. The specific working principle is as follows: The drawer guide rail of the present utility model comprises an inner rail 1 and an outer rail 2. The inner rail 1 is usually fixed to the bottom of the drawer, while the outer rail 2 is installed inside the drawer cabinet. The supporting portion 12 of the inner rail adopts a triangular cross-section structure with a wider top and a narrower bottom, with a sliding plane 13 arranged at the top and guide grooves 16 symmetrically formed by inward depressions on the left and right sides. When the outer rail 2 is sleeved on the inner rail 1, the two cooperate with each other through the ball holder 3, the needle rollers 31 and the ball bearings 32 to achieve smooth sliding.

[0023] During the sliding process of the drawer, the needle roller 31 rolls on the sliding plane 13 of the inner rail. By utilizing the sufficient supporting force of the sliding plane to cooperate with the needle roller, the bearing capacity of the guide rail is increased. Meanwhile, the ball 32 on the ball holder 3 rolls between the guiding groove 16 and the limiting groove 21 on the outer rail, ensuring the guiding property and stability of the guide rail. This dual-rolling structure enables the drawer to maintain smooth and stable sliding during the sliding process, effectively avoiding problems such as jamming and deviation that may occur during the sliding process.

[0024] The utility model solves the problem that the drawer in the prior art is prone to derailment by designing a limiting structure in which the guiding groove 16 and the limiting groove 21 cooperate with each other. The ball 32 rolls between the guiding groove and the limiting groove. When the drawer slides to the extreme position, the limiting groove can effectively prevent the drawer from sliding out excessively and avoid the occurrence of derailment.

[0025] The design of this limiting structure ensures that the drawer is always within the control range of the guide rail during the pulling-out and closing processes, increasing the reliability and safety of the guide rail system. At the same time, this limiting method is simple and efficient. Without additional complex devices, it can achieve an effective limiting function, reducing the production and assembly costs.

[0026] In addition, the supporting portion 12 in the utility model is made by bending the top plate of the connecting portion 11, and its free end overlaps with the side wall of the connecting portion 11. This integrated design not only simplifies the structure and reduces the number of parts, but also enhances the rigidity and strength of the supporting portion, ensuring the durability and stability of the guide rail during long-term use. In addition, the free end of the base portion 14 extends upward to form a reinforcing plate 15, further improving the anti-deformation ability of the inner rail. Especially when the drawer bears heavier objects, it effectively prevents the guide rail from deforming and enhances the overall strength of the structure.

[0027] In addition, by arranging the needle roller 31 and the ball 32 between the inner rail and the outer rail, the utility model realizes a sliding system with multi-point support. The needle roller rolls along the sliding plane of the inner rail, providing a smoother sliding process and reducing the wear caused by rolling friction. The ball rolls between the guiding groove and the limiting groove, playing a guiding and auxiliary supporting role, further dispersing the frictional force and load generated during the sliding process, thereby extending the service life of the guide rail system.

[0028] This dual-rolling structure reduces the noise generated during the use of the guide rail, improves the durability, enables the guide rail to still maintain smooth sliding performance after long-term use, and reduces the maintenance requirements. In addition, the design of the needle roller and the ball not only improves the sliding effect, but also enhances the bearing capacity of the guide rail system, enabling the guide rail to bear a greater load, so it can be widely promoted and used.

[0029] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments, and what is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed.

Claims

1. A drawer guide rail, characterized in that: It includes an inner rail (1) and an outer rail (2). The inner rail (1) includes a connecting portion (11) and a supporting portion (12) provided at its top. The cross-section of the supporting portion (12) is in a triangular shape that is wider at the top and narrower at the bottom. A sliding plane (13) is provided at the top of the supporting portion (12). Guide grooves (16) are symmetrically formed by inward depressions on the left and right sides of the supporting portion (12). The outer rail (2) is in the shape of an open groove with an open bottom, and the outer rail (2) is sleeved on the surface of the inner rail (1). A ball cage (3) is provided between the outer rail (2) and the inner rail (1). Needle rollers (31) are provided in the ball cage (3), and the needle rollers (31) roll on the sliding plane (13). Limit grooves (21) are provided in the outer rail (2) at positions corresponding to the guide grooves (16). Ball bearings (32) are provided on both sides of the ball cage (3), and the ball bearings (32) roll between the guide grooves (16) and the limit grooves (21).

2. The drawer guide rail according to claim 1, characterized in that: The supporting portion (12) is formed by bending the top plate of the connecting portion (11), and the free end of the supporting portion (12) overlaps with the side wall of the connecting portion (11).

3. A drawer guide according to claim 1, characterized in that: A base portion (14) is also laterally extended and provided at the bottom of the connecting portion (11), and the base portion (14) is connected to the mounting seat (4).

4. A drawer guide according to claim 3, characterized in that: The mounting seat (4) is connected to the bottom of the base portion (14), and the two are riveted and fixed together by rivets.

5. A drawer guide according to claim 3, characterized in that: A reinforcing plate (15) extends upward from the free end of the base portion (14).

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