Casement door buffer

Abstract

A kind of buffer of overhead door, it includes: a track seat, track seat is equipped with track;A lever, lever has first end and second end, first end is equipped with guide wheel along track sliding, second end is equipped with roller and at least one buffer pipe, buffer pipe is equipped with inner cavity and throttle valve in;A buffer body, buffer body is equipped with chamber, chamber is equipped with convex shaft and positioning part in, convex shaft is equipped with torsional spring, one end of torsional spring is connected buffer body, the other end is connected lever, lever is rotatably arranged on convex shaft, positioning part is equipped with recess for roller;And at least one buffer rod, at least one buffer rod is fixed to buffer body, extends into buffer pipe inner cavity, wherein buffer pipe and buffer rod are all arc curved shape, and are arranged with convex shaft as center of circle.Through the gas in the inner cavity of buffer pipe, damping is generated, so that the closing speed of door leaf is controlled.

Description

Technical Field

[0001] This utility model relates to a buffer, and more particularly to a swing door buffer. Background Technology

[0002] In general building or cabinet hinged door applications, door closers or dampers are usually installed to prevent the door from violently impacting the door frame or cabinet when closing. The core function of door closers or dampers is to provide damping. Damping refers to applying resistance to a moving body to control its rotational or sliding speed, thereby reducing impact, noise, and improving operational smoothness. Based on the medium or method of damping generation, damping can be classified into the following types: 1. Hydraulic damping: The fluid resistance generated by the viscosity of a liquid flowing through a narrow channel. For example, the oil in a hydraulic door closer controls the closing speed of the door through a piston, check valve, or speed control port.

[0003] II. Gas damping: Resistance is generated by gas compression and flow, such as gas flowing through a throttle valve in a hollow tube or internal cavity, to control the speed of movement.

[0004] III. Solid / Friction damping: Resistance is generated through the deformation or friction of elastic materials, such as rubber pads, friction plates, or torsion springs.

[0005] In existing technologies, most common door closers employ a hydraulic piston structure, using liquid as a damping medium to control the door's movement speed and reduce the closing force. However, this type of structure relies on seals between the piston and cylinder to maintain liquid pressure. With long-term use, seal aging or liquid leakage can lead to unstable damping effects, resulting in uneven closing speeds, increased noise, and shortened service life. Furthermore, maintenance and manufacturing costs are relatively high.

[0006] For example, a "hydraulic buffer door closer" disclosed in Taiwan Patent No. M660240 has a hydraulic chamber, piston, pressure spring, and speed-regulating needle inside the door closer body. It uses hydraulic oil through a one-way valve and an oil passage to achieve door closing buffering. Although it can buffer the door leaf to a certain extent, its operation relies on a sealing ring to keep the oil circuit sealed. With long-term use, oil leakage or unstable damping may still occur, resulting in unstable closing speed. In addition, the hydraulic structure is relatively complex, with high processing and maintenance costs, which is not conducive to the application of light or small swing doors.

[0007] However, the buffering effect of traditional hydraulic dampers is easily affected by seal wear or oil leakage. The damping is unstable and noisy when closing the door. Long-term use may reduce durability and increase maintenance costs.

[0008] Therefore, how to improve the above-mentioned shortcomings is the technical difficulty that the creator of this case wants to solve. Utility Model Content

[0009] In view of the present invention, the present invention aims to solve and improve the existing problems and deficiencies.

[0010] To achieve the above objectives, this utility model provides a swing door damper, comprising: a track seat with a track; a lever with a first end and a second end, the first end having a guide wheel that can slide along the track, and the second end having a roller and at least one buffer tube, the buffer tube having an inner cavity with a throttle valve; a damper body with a chamber, a convex shaft and a positioning part in the chamber, a torsion spring on the convex shaft, one end of the torsion spring being connected to the damper body and the other end being connected to the lever, the lever being rotatably mounted on the convex shaft, the positioning part having a recess corresponding to the roller; and at least one buffer rod, the at least one buffer rod being mounted on the damper body and extending into the inner cavity of the buffer tube, wherein both the buffer tube and the buffer rod are arc-shaped and arranged around the convex shaft.

[0011] The lever has two opposing bearings at its second end, with a roller between them, and a buffer tube on each bearing.

[0012] The positioning part is arc-shaped, and the concave part is formed in the middle of the arc.

[0013] The buffer body has an opening that allows the first end of the lever to extend outside the buffer body.

[0014] The curvature of the buffer rod matches the shape of the inner cavity of the buffer tube.

[0015] The buffer bar is equipped with a rubber pad.

[0016] The beneficial effects of this invention are as follows: The gas inside the buffer tube generates damping. When the lever rotates, the gas inside the tube is compressed, creating resistance and controlling the closing speed of the door. Simultaneously, the torsion spring provides rotational torque, causing the door to close automatically. Gas damping not only maintains smooth movement and reduces impact and noise, but also avoids the oil leakage problems that may occur with traditional hydraulic buffers, improving the stability and service life of the buffer. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the swing door buffer in this embodiment.

[0018] Figure 2This is an exploded view of the swing door buffer in this embodiment.

[0019] Figure 3 This is an exploded view of the swing door buffer from another angle in this embodiment.

[0020] Figure 4 This is a schematic diagram of the installation of the swing door buffer in this embodiment.

[0021] Figure 5 This is an initial schematic diagram of the swing door buffer in this embodiment when the door is closed.

[0022] Figure 6 This is a schematic diagram illustrating the action of the swing door buffer when the door is opened, as shown in this embodiment.

[0023] Figure 7 This is a perspective view of the swing door buffer in this embodiment when the door is closed.

[0024] Figure 8 This is a schematic diagram illustrating the action of the swing door buffer in this embodiment when the door is closed.

[0025] Explanation of reference numerals in the attached figures: 1: Track base 11: Track 2: Lever 20: Bearing 21: First end 22: Second end 23: Guide roller 24: Roller 25: Buffer tube 26: Inner cavity 27: Throttle valve; 3: Buffer body 31: Chamber 311: Groove 32: Protruding shaft; 33: Positioning part 34: Torsion spring 35: Recessed part 36: Opening 4: Buffer bar 41: Rubber pad. Detailed Implementation

[0026] To facilitate a concise understanding of the other features, advantages, and effects of this utility model, the following detailed description, in conjunction with the accompanying drawings, is provided: Please see Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides a swing door buffer, which includes: A track base 1 is provided with a track 11. The track base 1 can be fixed to a door frame. The track 11 is used to accommodate a sliding element and ensure its movement along a predetermined path. The track 11 can be designed to be slightly inclined so that the sliding element can operate smoothly.

[0027] A lever 2 has a first end 21 and a second end 22. The first end 21 is provided with a guide wheel 23 that can slide along the track 11. The second end 22 is provided with a roller 24 and at least one buffer tube 25. The buffer tube 25 is provided with an inner cavity 26, and the inner cavity 26 is provided with a throttle valve 27.

[0028] The throttle valve 27 is a component used to control the flow rate of gas. It typically has an adjustable orifice or throttling port through which gas must flow. Smaller orifices result in greater resistance, while larger orifices result in less resistance. The throttle valve 27 controls the speed at which gas flows through. It is installed within the inner cavity 26 of a buffer tube 25, which contains gas.

[0029] The lever 2 is an elongated component. The guide wheel 23 can be a freely rotating structure to reduce sliding friction and keep the lever 2 moving smoothly. The roller 24 is used to position the lever 2 and prevent it from wobbling.

[0030] In practice, the second end 22 of the lever 2 is provided with two upper and lower opposite bearings 20, and the roller 24 is provided between the two bearings 20; each bearing 20 is provided with a buffer tube 25, which is a combination of upper and lower parts, and together they form a complete buffer tube 25.

[0031] This design offers the following advantages: During the rotation of the lever 2, its second end 22 is subjected to the rotational torque generated by the door opening and closing, as well as the torque released by the torsion spring 34. If only a single buffer tube 25 is used, the rotational torque and gas damping will be concentrated on one side, potentially causing accelerated local wear and slight wobbling. By symmetrically placing the upper and lower buffer tubes 25 on the bearing 20 of the second end 22 of the lever 2, the rotational torque and gas damping can be evenly distributed, reducing local wear, maintaining smooth rotational movement, and improving overall stability and durability.

[0032] A buffer body 3 is provided with a chamber 31. A convex shaft 32 and a positioning part 33 are provided in the chamber 31. A torsion spring 34 is provided on the convex shaft 32. One end of the torsion spring 34 is connected to the buffer body 3, and the other end of the torsion spring 34 is connected to the lever 2. The lever 2 is rotatably provided on the convex shaft 32. The positioning part 33 is provided with a recess 35 corresponding to the roller 24.

[0033] The positioning part 33 is arc-shaped with a recess 35 in the middle. Both ends of the positioning part 33 are flat and respectively embedded in two grooves 311 provided in the chamber 31 of the buffer body 3, so that the positioning part 33 is firmly fixed in the buffer body 3 and the recess 35 is kept in a predetermined position to facilitate the movement or engagement of subsequent components. The recess 35 is used to correspond to and accommodate the roller 24 of the second end 22 of the lever 2. The torsion spring 34 is connected to the cam shaft 32 and the lever 2, and the torsion spring 34 can store rotational torque.

[0034] The buffer body 3 has an opening 36, which allows the first end 21 of the lever 2 to extend outside the buffer body 3 so as to engage with the track 11 of the track seat 1. The chamber 31 is used to house the internal components and provide fixed support. The convex shaft 32 serves as the fulcrum for the rotation of the lever 2, ensuring that the lever 2 maintains stable and smooth movement during rotation.

[0035] At least one buffer rod 4 is disposed on the buffer body 3 and the buffer rod 4 extends into the inner cavity 26 of the buffer tube 25. The buffer tube 25 and the buffer rod 4 are both curved in an arc shape and are arranged with the convex shaft 32 as the center.

[0036] The buffer rod 4 may be equipped with a rubber pad 41, which is used to increase the buffering effect and reduce friction, so that the buffer tube 25 moves smoothly during rotation and reduces wear. The curvature of the buffer rod 4 matches the shape of the inner cavity 26 of the buffer tube 25 to ensure that the buffer tube 25 can rotate smoothly along the buffer rod 4 and maintain stable contact, thereby achieving a good buffering and support effect.

[0037] Please see Figure 2 and Figure 4 As shown, the installation process is as follows: First, fix the track seat 1 to the door frame. Next, install the buffer body 3 on the top of the door leaf, aligning the cam 32 with the installation position. Install the lever 2 onto the cam 32, ensuring the roller 24 is positioned on the positioning part 33. Fix the buffer rod 4 inside the buffer body 3, aligning the rubber pad 41 with the inner cavity 26 of the buffer tube 25. Connect the guide wheel 23 to the track 11 and check for smooth rotation and sliding.

[0038] Please see Figure 5 , Figure 6 and Figure 7As shown, the door is opened (torsion spring 34 energy storage stage): When the door is pushed open, the door drives the guide wheel 23 to slide along the track 11, and the lever 2 rotates around the convex shaft 32. As the lever 2 rotates, the roller 24 moves towards the recess 35, and the torsion spring 34 is tightened to store rotational torque. When the door is fully open, the guide wheel 23 disengages from the track 11, the lever 2 is still supported by the convex shaft 32, and the roller 24 engages with the recess 35 to stabilize the position of the lever 2 and prevent wobbling. At the same time, the buffer tube 25 is displaced due to the rotation of the lever 2, allowing gas in the inner cavity 26 to flow in, preparing for the subsequent door closing buffer stage.

[0039] During the opening of the door, the throttle valve 27 controls the flow rate of gas into the inner cavity 26. The gas flows through the orifice of the throttle valve 27, generating appropriate gas flow resistance. By adjusting the orifice diameter of the throttle valve 27 or the volume of the buffer tube 25, the intake speed and gas distribution can be controlled to ensure a smooth and buffered opening process, preventing the door from being pushed open too quickly.

[0040] Please refer to Figure 8 As shown, the door is closed (torsion spring 34 release and buffering stage): When the door is closed, the guide wheel 23 of the lever 2 extends into the track 11, the torsion spring 34 releases the stored rotational torque, drives the lever 2 to rotate, and makes the door gradually close to achieve the effect of automatic closing.

[0041] As the lever 2 rotates, the roller 24 moves out of the recess 35 of the positioning part 33, and the buffer tube 25 rotates synchronously around the fixed buffer rod 4. At this time, the gas inside the buffer tube 25 is compressed and needs to be discharged through the orifice of the throttle valve 27. Resistance is generated during the gas flow, thus forming gas damping. By adjusting the orifice size of the throttle valve 27 or the size of the buffer tube 25, the gas flow rate and damping intensity can be controlled. Combined with the contact between the rubber pad 41 and the buffer tube 25, the damping effect can be further enhanced, making the door closing process smooth and buffering.

[0042] This invention utilizes the gas within the cavity 26 of the buffer tube 25 to generate damping. When the lever 2 rotates, the gas inside the buffer tube 25 is compressed, creating resistance and controlling the closing speed of the door. Simultaneously, the torsion spring 34 provides rotational torque, causing the door to close automatically. This gas damping not only maintains smooth movement and reduces impact and noise but also avoids the oil leakage problems that may occur with traditional hydraulic buffers, improving the stability and service life of the buffer.

[0043] Furthermore, this utility model adopts a rotary structure design. By rotating the lever 2 around the convex shaft 32, the buffer rod 4 and the buffer tube 25 slide relative to each other along an arc path. Compared with the traditional linear buffer, it has the following advantages: balanced force distribution, so that the gas damping force and rotational torque are distributed along the arc, avoiding local wear and shaking, and improving the smoothness of movement and structural durability; reduced component wear, the arc sliding path reduces the instantaneous pressure on the contact surface and extends the service life; smoother operation, effectively disperses resistance, and reduces the impact and noise during the door opening process.

[0044] The above discussion is merely a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. Therefore, any equivalent changes in shape, structure or combination made without departing from the spirit and scope of the present utility model should be covered within the scope of the patent application of the present utility model.

Claims

1. A swing door buffer, characterized in that, include: A track base, wherein the track base is provided with a track; A lever having a first end and a second end, the first end having a guide wheel that can slide along the track, and the second end having a roller and at least one buffer tube, the buffer tube having an inner cavity having a throttle valve. A buffer body, the buffer body having a chamber, a convex shaft and a positioning part being provided in the chamber, a torsion spring being provided on the convex shaft, one end of the torsion spring being connected to the buffer body, the other end of the torsion spring being connected to a lever, the lever being rotatably mounted on the convex shaft, and the positioning part having a recess corresponding to the roller; and At least one buffer rod is disposed on the buffer body and extends into the inner cavity of the buffer tube, wherein the buffer tube and the buffer rod are both curved in an arc shape and are arranged with the convex shaft as the center.

2. The swing door buffer as described in claim 1, characterized in that, The second end of the lever is provided with two opposing bearings, with the roller between the two bearings, and the buffer tube is provided on each of the two bearings.

3. The swing door buffer as described in claim 1, characterized in that, The positioning part is arc-shaped, and the concave part is formed in the middle of the arc.

4. The swing door buffer as described in claim 1, characterized in that, The buffer body has an opening that allows the first end of the lever to extend outside the buffer body.

5. The swing door buffer as described in claim 1, characterized in that, The curvature of the buffer rod matches the inner shape of the buffer tube.

6. The swing door buffer as described in claim 1, characterized in that, The buffer bar has a rubber pad.

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