Automatic buffering door closer of double-spring linkage sliding door

Abstract

An automatic buffering door closer of a double-spring linkage sliding door comprises a main body, a sliding groove and a containing groove are formed in the main body, a guide rail and a tripping rail which are communicated with each other are arranged on the side wall of the sliding groove, a sliding block is installed in the sliding groove in a sliding mode, and a moving block and a guide block are arranged on the sliding block; a buffer is installed in the containing groove, and a piston rod of the buffer extends into the sliding groove to be connected with the sliding block. A first spring groove and a second spring groove are further formed in the body, a first tension spring is installed in the first spring groove and connected with the sliding block, and a second tension spring is installed in the second spring groove and connected with the sliding block. The first tension spring and the second tension spring jointly pull the sliding block to move in the door closing direction all the time. The sliding door buffer device has the advantages that the design that the first tension spring and the second tension spring are in double-spring linkage is adopted, the two springs work cooperatively and jointly bear tension and reset force needed in the buffering and door closing process of a sliding door, and the service life of the sliding door buffer device is prolonged.

Description

Technical Field

[0001] This utility model relates to a door closing buffer technology, specifically a double-spring linkage sliding door automatic buffer door closer. Background Technology

[0002] In recent years, automatic soft-close door closers have been increasingly widely used in public places, commercial buildings, and residences. Their main function is to provide a buffer during the door closing process, preventing damage or noise caused by excessive impact, thereby improving the service life and safety of the equipment. Especially for sliding doors, automatic soft-close door closers must not only ensure smooth closing but also reliable operation under various working conditions.

[0003] Traditional sliding door automatic soft-close mechanisms often employ a simple structural design, with their core soft-close mechanism typically consisting of only a single tension spring. The soft-close function is achieved through the tension of this single spring. In this design, the tension spring must bear the load of both soft-close and reset during the entire door closing process, resulting in the following main drawbacks:

[0004] 1. Excessive workload: Because the required buffering and restoring force is provided by only a single tension spring, the spring must withstand a large torque and tension during operation. Long-term high-load operation can easily lead to spring fatigue, wear, or even breakage. If the tension spring is damaged during use, the entire buffer door closer will lose its core function, causing the product to malfunction and seriously affecting safety and reliability.

[0005] Insufficient stability and safety: The single-spring structure is prone to uneven torque distribution when the door closes, causing shaking or uneven speed during closure, which in turn affects the buffering effect and closing stability. Furthermore, since the spring bears the entire workload, any local material defects or installation deviations may cause system failure, reducing overall safety.

[0006] 2. High Design and Debugging Difficulty: Because the buffering function relies solely on a single tension spring, the product requires high precision in spring selection, preload, and installation location during design and debugging. Any deviation in design parameters or significant installation errors can lead to uncontrolled closing speed or poor buffering performance. These issues not only increase manufacturing and assembly difficulty but also raise subsequent maintenance and replacement costs.

[0007] 3. Limited Durability: Under conditions of high-frequency use and repetitive movement, a single tension spring is prone to fatigue failure, thus shortening the overall service life of the product. Since there is no redundant structure to distribute the load, the long-term durability and reliability of traditional buffer door closers are difficult to guarantee, therefore further improvements are necessary. Utility Model Content

[0008] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a double-spring linkage sliding door automatic buffer door closer that is simple in structure, easy to use, can share the workload, improve the stability of the buffer door closer, improve the overall torque distribution, and achieve smooth buffering during the door closing process.

[0009] The purpose of this utility model is achieved through the following means: a double-spring linkage sliding door automatic buffer door closer, which includes a main body, on which a sliding groove and a receiving groove are provided, and a guide rail and a release rail are provided on the side wall of the sliding groove, and a slider is slidably installed in the sliding groove, and a moving block and a guide block are provided on the slider. The moving block extends into the guide rail and slides, and the guide block slides in the guide rail or the release rail.

[0010] A buffer is installed in the receiving groove, and the piston rod of the buffer extends into the sliding groove and is connected to the slider.

[0011] The main body is also provided with a first spring groove and a second spring groove. A first tension spring is installed in the first spring groove and connected to the slider. A second tension spring is installed in the second spring groove and connected to the slider. The first tension spring and the second tension spring together pull the slider to move in the closing direction.

[0012] Furthermore, the first and second tension springs are symmetrically mounted side-by-side on the front and rear end faces of the slider.

[0013] Furthermore, the piston rod has a hinge seat connected to its end, and the hinge seat is mounted on the moving block.

[0014] Furthermore, the slider has a hinge area corresponding to the hinge seat position, and the moving block is a round shaft set in the hinge area.

[0015] Furthermore, the slider is symmetrically provided with a third spring groove and a fourth spring groove, and the other ends of the first tension spring and the second tension spring are snapped into the third spring groove and the fourth spring groove.

[0016] Furthermore, the third and fourth spring grooves are positioned upwards away from the moving block, generating a lever force on the slider with the moving block as the fulcrum, causing one end of the guide block to swing.

[0017] Furthermore: the guide rail and the release rail are interconnected, the guide rail extends horizontally, the release rail is inclined to the guide rail, and the guide rail and the release rail are distributed in a figure-7 shape.

[0018] Furthermore, the guide rail and the release rail are provided in two pairs, symmetrically distributed on the front and rear side walls of the sliding groove.

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

[0020] 2. This utility model adopts a double-spring linkage design with a first tension spring and a second tension spring, enabling the two springs to work together to bear the pulling force and restoring force required during the sliding door's buffering and closing process. Compared with the traditional structure that only uses a single tension spring, the double-spring design effectively reduces the workload of a single tension spring, thereby greatly reducing the risk of spring fatigue and breakage, and improving the overall reliability and service life of the device.

[0021] 3. The first and second tension springs are installed on the slider in a symmetrical arrangement side by side, which ensures a balanced distribution of tension force on the slider. This torque balance design not only avoids mechanism misalignment caused by excessive force on one side, but also ensures smooth movement of the door during closing, avoiding uneven closing or vibration, thereby improving the working stability of the buffer door closer.

[0022] 4. In this utility model, the sliding groove, guide rail, and release rail set within the main body, along with the moving block and guide block set on the slider, enable the slider to slide precisely within the groove and swing as necessary. In particular, the sliding of the guide block within the guide rail and release rail, and its local swing under the action of leverage, allow the buffering and closing process to flexibly adjust the movement path according to actual needs, thereby achieving a smooth and safe closing effect. Attached Figure Description

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

[0024] Figure 2-4 This is an exploded view of the structure of this utility model.

[0025] Figure 5 This is an assembly diagram of the slider, the first tension spring, and the second tension spring in this utility model.

[0026] Figure 6 This is an exploded view of the slider, the first tension spring, and the second tension spring in this utility model.

[0027] Figure 7 This is a cross-sectional view of the structure of this utility model. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings. A double-spring linkage sliding door automatic buffer door closer includes a main body 1, on which a sliding groove 2 and a receiving groove 3 are provided. The side wall of the sliding groove 2 is provided with a guide rail 21 and a release rail 22 that are interconnected. A slider 4 is slidably installed in the sliding groove 2. The slider 4 is provided with a moving block 41 and a guide block 42. The moving block 41 extends into the guide rail 21 and slides, and the guide block 42 slides within the guide rail 21 or the release rail 22.

[0029] A buffer 5 is installed in the receiving groove 3, and the piston rod 51 of the buffer 5 extends into the sliding groove 2 and is connected to the slider 4.

[0030] The main body 1 is also provided with a first spring groove 11 and a second spring groove 12. A first tension spring 6 is installed in the first spring groove 11 and connected to the slider 4. A second tension spring 7 is installed in the second spring groove 12 and connected to the slider 4. The first tension spring 6 and the second tension spring 7 together pull the slider 4 to move in the closing direction.

[0031] In one embodiment, the first tension spring 6 and the second tension spring 7 are symmetrically mounted side by side on the front and rear end faces of the slider 4.

[0032] In one embodiment: the end of the piston rod 51 is connected to a hinge seat 52, which is mounted on the movable block 41.

[0033] In one embodiment: the slider 4 has a hinge area 43 at the position corresponding to the hinge seat 52, and the moving block 41 is a round shaft disposed in the hinge area 43.

[0034] The slider 4 is symmetrically provided with a third spring groove 44 and a fourth spring groove 45, and the other ends of the first tension spring 6 and the second tension spring 7 are snapped into the third spring groove 44 and the fourth spring groove 45.

[0035] The third spring groove 44 and the fourth spring groove 45 are positioned upwards away from the moving block 41, generating a lever force on the slider 4 with the moving block 41 as the fulcrum, which pries one end of the guide block 42 to swing.

[0036] The guide rail 21 and the release rail 22 are interconnected. The guide rail 21 extends horizontally, and the release rail 22 is inclined to the guide rail 21. The guide rail 21 and the release rail 22 are distributed in a figure-7 shape.

[0037] The guide rail 21 and the release rail 22 are provided in two pairs, symmetrically distributed on the front and rear side walls of the sliding groove 2.

[0038] Working Principle: This utility model of a double-spring linkage sliding door automatic buffer door closer adopts a multi-stage linkage structure, which effectively absorbs and buffers the impact force during the door closing process, ensuring a smooth and stable closing process, and significantly reducing the risk of single-spring workload. Its specific working principle can be divided into the following stages:

[0039] 1. Initial state and pre-installation

[0040] Structural Arrangement: The main body 1 is equipped with a sliding groove 2 and a receiving groove 3. The side walls of the sliding groove 2 are respectively provided with interconnected guide rails 21 and release rails 22, arranged in a figure-7 shape. A pair of sliders and auxiliary components are symmetrically distributed on the front and rear side walls of the sliding groove. The slider 4 is installed within the sliding groove 2, and a moving block 41 and a guide block 42 are provided on it. The moving block 41 slides along the guide rail 21 to ensure the stability of the slider's overall movement trajectory; while the guide block 42 slides within the guide rail 21 and the release rail 22 according to the buffer's state, initially mainly within the guide rail.

[0041] Buffer connection: A buffer 5 is installed in the receiving groove 3, and its piston rod 51 extends into the sliding groove 2 and is connected to the slider 4, in an unforced or pre-buffered state.

[0042] Spring pretensioning: The main body is provided with a first spring groove 11 and a second spring groove 12, on which a first tension spring 6 and a second tension spring 7 are respectively installed. Both of these tension springs are connected to the slider 4 and are symmetrically installed side by side on the front and rear end faces of the slider to provide balanced tension for subsequent door closing.

[0043] 2. Door-closed start and slider movement

[0044] When the sliding door closes to the set position, the trigger on the sliding door hits the slider, causing the slider to deflect. The guide block on the slider disengages from the release track 21 and enters the guide track. The first tension spring 6 and the second tension spring 7 begin to apply tension to the slider 4, causing it to move along the sliding groove 2 in the closing direction. When the slider moves, the trigger pulls the sliding door to close.

[0045] At this time, the moving block 41 is always embedded in the guide rail 21 to ensure that the slider slides smoothly along the set trajectory; while the guide block 42 slides in the guide rail 21, so that the slider moves horizontally and pulls the sliding door to the closed state.

[0046] When the user opens the sliding door, the force of the push moves the slider, forcing it to move towards the release track. When the sliding door opens to the set position, the guide block moves from the guide track into the release track 22. As the slider swings, it separates from the trigger on the sliding door, allowing the door to continue opening. The slider is then locked in the release track by the guide block, causing the first and second tension springs to be pre-tensioned, generating elastic force to pull the slider back to its original position.

[0047] Meanwhile, when the slider 4 moves, the third spring groove 44 and the fourth spring groove 45 provided on the slider receive the other end of the first tension spring 6 and the second tension spring 7 respectively, and their arrangement position is offset upward relative to the moving block 41, forming a lever effect with the moving block 41 as the fulcrum under the action of the tension spring.

[0048] The leverage effect causes one end of the guide block 42 on the slider to be pried, generating a certain angle of swing force. When the sliding door is closed, the trigger on the sliding door hits the slider, which causes the guide block to move from the release track 22 into the guide track 21 to reset.

[0049] At this time, as the guide block 42 swings, the piston rod 51 of the buffer 5 gradually intervenes in the movement process through its connection with the slider 4, and is connected to the hinge of the moving block 41 through the hinge seat 52, so that the buffer can smoothly absorb the impact energy during the closing process, and finally make the sliding door close slowly.

[0050] Compared with traditional technology, in this case, the first tension spring 6 and the second tension spring 7 always pull the slider 4 together, maintaining the overall torque balance during the buffering process and preventing the mechanism from tilting due to unilateral force.

[0051] At the same time, the first and second tension springs evenly share the buffering and tension during the door closing process, reducing the load on a single spring, reducing the risk of fatigue and breakage due to overload, and extending the product's service life.

[0052] In summary, this utility model achieves balanced distribution and precise adjustment of the workload of the automatic sliding door buffer closer through double-spring linkage, left-right symmetry, and multi-level linkage control, ensuring the continuity and stability of the buffering effect during the closing process. It effectively solves the defects of traditional single-spring structure such as excessive load and insufficient stability, and significantly improves the safety, durability and reliability of the product.

[0053] 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 double-spring linkage automatic buffer door closer, characterized in that: It includes a main body (1), on which a sliding groove (2) and a receiving groove (3) are provided. The side wall of the sliding groove (2) is provided with a guide rail (21) and a release rail (22) that are interconnected. A slider (4) is slidably installed in the sliding groove (2). A moving block (41) and a guide block (42) are provided on the slider (4). The moving block (41) extends into the guide rail (21) and slides. The guide block (42) is located in the guide rail (21) or the release rail (22) and slides. A buffer (5) is installed in the receiving groove (3), and the piston rod (51) of the buffer (5) extends into the sliding groove (2) and is connected to the slider (4); The main body (1) is also provided with a first spring groove (11) and a second spring groove (12). The first spring groove (11) is equipped with a first tension spring (6) and connected to the slider (4). The second spring groove (12) is equipped with a second tension spring (7) and connected to the slider (4). The first tension spring (6) and the second tension spring (7) together pull the slider (4) to move in the direction of closing the door.

2. The automatic buffer door closer for a double-spring linkage sliding door according to claim 1, characterized in that: The first tension spring (6) and the second tension spring (7) are symmetrically installed side by side on the front and rear end faces of the slider (4).

3. The automatic buffer door closer for a double-spring linkage sliding door according to claim 1, characterized in that: The piston rod (51) is connected to a hinge seat (52) at its end, and the hinge seat (52) is mounted on the moving block (41).

4. The automatic buffer door closer for a double-spring linkage sliding door according to claim 3, characterized in that: The slider (4) has a hinge area (43) at the position corresponding to the hinge seat (52), and the moving block (41) is a round shaft set in the hinge area (43).

5. The automatic buffer door closer for a double-spring linkage sliding door according to claim 1, characterized in that: The slider (4) is symmetrically provided with a third spring groove (44) and a fourth spring groove (45), and the other ends of the first tension spring (6) and the second tension spring (7) are snapped into the third spring groove (44) and the fourth spring groove (45).

6. The automatic buffer door closer for a double-spring linkage sliding door according to claim 5, characterized in that: The third spring groove (44) and the fourth spring groove (45) are positioned upwards away from the moving block (41) to generate a lever force on the slider (4) with the moving block (41) as the fulcrum, which pryes one end of the guide block (42) to swing.

7. The automatic buffer door closer for a double-spring linkage sliding door according to claim 1, characterized in that: The guide rail (21) and the release rail (22) are interconnected. The guide rail (21) extends horizontally, and the release rail (22) is inclined to the guide rail (21). The guide rail (21) and the release rail (22) are distributed in a figure-7 shape.

8. The automatic buffer door closer for a double-spring linkage sliding door according to claim 1, characterized in that: The guide rail (21) and the release rail (22) are provided in two pairs, symmetrically distributed on the front and rear side walls of the sliding groove (2).

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