Buffer structure of door hinge

Abstract

A buffering structure of a door hinge comprises a hinge cup and a hinge arm, the hinge cup and the hinge arm are hinged through an upper connecting rod and a lower connecting rod, the upper connecting rod and the lower connecting rod swing relative to the hinge cup or the hinge arm to achieve opening and closing of the door hinge, a shaft sleeve is arranged on one outer side face of the hinge cup, and a buffer is installed in the shaft sleeve. A sliding block is installed in the shaft sleeve in a sliding mode, and a rack is arranged on the sliding block. The buffer is connected with the sliding block and used for controlling the movement speed of the sliding block. The upper connecting rod and the lower connecting rod are hinged to the hinge cup through a hinge shaft, a gear is fixedly installed on the hinge shaft connected with the upper connecting rod or the lower connecting rod, and the gear is coaxially and fixedly connected with the upper connecting rod or the lower connecting rod through the hinge shaft. The gear is meshed with the rack, the hinge is closed, the gear drives the rack to move, the sliding block pushes the buffer to move, and therefore damping force is generated when the door is closed.

Description

Technical Field

[0001] This utility model relates to a door hinge, specifically a door hinge buffer structure. Background Technology

[0002] To improve the comfort and extend the lifespan of hinges, damping hinges have emerged. They primarily utilize damping devices to smoothly buffer the hinge's opening and closing process, preventing impacts and noise caused by rapid closing. In existing technologies, damping hinges typically place the damping device inside the hinge cup or hinge arm. However, the limited internal space of the hinge cup and arm significantly restricts the installation location of the damping device. Traditionally, to cope with this confined installation space, the damper needs to be designed to be quite small, resulting in a narrow impact force range that the damper can withstand. Smaller dampers cannot provide sufficient cushioning, leading to greater stress on the damper. Over time, the damper is prone to wear, accelerating performance degradation, shortening its lifespan, and ultimately causing damage or failure to achieve the desired cushioning effect. Furthermore, the poor cushioning effect increases the risk of noise generation, failing to meet the demand for quiet operation. Simultaneously, the damper requires a very compact assembly with other components, making installation difficult and costly, hindering the widespread use of hinges. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of existing technologies and provide a door hinge buffer structure that is simple in structure, low in manufacturing cost, has an ideal buffering effect, is easy to assemble and disassemble, improves impact resistance and pressure resistance, and is compatible with various types and specifications of door hinges.

[0004] The purpose of this utility model is achieved by the following method: a buffer structure for a door hinge, comprising a hinge cup and a hinge arm, the hinge cup and the hinge arm being hinged together by an upper connecting rod and a lower connecting rod, the upper connecting rod and the lower connecting rod swinging relative to the hinge cup or the hinge arm to realize the opening and closing of the door hinge, a bushing is provided on one outer side of the hinge cup, and a buffer is installed in the bushing; a slider is slidably installed in the bushing, and a rack is provided on the slider; the buffer is connected to the slider and is used to control the movement speed of the slider;

[0005] The upper and lower connecting rods are hinged to the hinge cup via a hinge shaft, and a gear is fixedly installed on the hinge shaft connected to the upper or lower connecting rod. The gear is coaxially fixedly connected to the upper or lower connecting rod via the hinge shaft. The gear meshes with the rack, the hinge is closed, the gear drives the rack to move, causing the slider to push the buffer to move, thereby generating a damping force when the door is closed.

[0006] The buffer is a compression damping type hydraulic damper. The cylinder part of the buffer is fixed inside the bushing, and the piston rod of the buffer is connected to the slider.

[0007] The piston rod is provided with a locking platform, and the slider is provided with a locking groove. The port of the locking groove is open, and the locking platform passes through the open end of the locking groove and is locked in the locking groove.

[0008] The slot is T-shaped, with the width of its upper section being smaller than the width of its lower section, and also smaller than the diameter of the piston rod.

[0009] The slider is provided with a lower spring post, and corresponding to the lower spring post, an upper spring post is provided on the bushing. One end of the spring is looped around the lower spring post and presses against the end face of the slider, while the other end is looped around the upper spring post and presses against the bushing. The spring generates a thrust, pushing the slider to move away from the bushing.

[0010] The hinge cup has a positioning stop on its side wall, and the tail of the buffer is pressed against the positioning stop.

[0011] The hinge cup has several snap-fit ​​holes on its side wall, and the bushing has several elastic claws. The elastic claws are installed in the snap-fit ​​holes to fix the bushing to the hinge cup.

[0012] The beneficial effects of this utility model are: 1. Simple structure, low manufacturing cost, and improved market competitiveness.

[0013] The damper is installed on the outside of the hinge cup, no longer limited by the narrow space inside the hinge cup, which significantly improves the damper's cushioning performance. It is compatible with various types and specifications of hinges and has stronger impact resistance and durability.

[0014] By using gears and racks in cooperation, the movement of the hinge during closing is ensured to be stable and reliable.

[0015] The damper is located on the outside, which enhances the overall aesthetics of the hinge and makes the structure cleaner. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the open state of the door hinge in this utility model.

[0017] Figure 2 This is a schematic diagram of the closed state of the door hinge in this utility model.

[0018] Figure 3 This is a schematic diagram of the installation of the buffer behind the hidden slider in this utility model.

[0019] Figure 4 This is a schematic diagram of the installation of the buffer and bushing in this utility model.

[0020] Figure 5 This is a schematic diagram of the structure of the bushing of this utility model.

[0021] Figure 6 This is a schematic diagram of the buffer structure in this utility model.

[0022] Figure 7 This is a structural assembly drawing of the gear and hinge shaft in this utility model. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings. A door hinge buffer structure includes a hinge cup 2 and a hinge arm 1. The hinge cup 2 and the hinge arm 1 are hinged together by an upper connecting rod 31 and a lower connecting rod 32. The upper connecting rod 31 and the lower connecting rod 32 swing relative to the hinge cup 2 or the hinge arm 1 to realize the opening and closing of the door hinge. A bushing 4 is provided on one outer side of the hinge cup 2, and a buffer 7 is installed inside the bushing 4. A slider 5 is slidably installed inside the bushing 4, and a rack 51 is provided on the slider 5. The buffer 7 is connected to the slider 5 and is used to control the movement speed of the slider 5.

[0024] The upper connecting rod 31 and the lower connecting rod 32 are hinged to the hinge cup 2 via a hinge shaft 33. A gear 6 is fixedly installed on the hinge shaft 33 connected to the upper connecting rod 31 or the lower connecting rod 32. The gear 6 is coaxially fixedly connected to the upper connecting rod 31 or the lower connecting rod 32 via the hinge shaft 33. The gear 6 meshes with the rack 51. When the hinge is closed, the gear 6 drives the rack 51 to move, causing the slider 5 to push the buffer 7 to move, thereby generating a damping force when the door is closed.

[0025] The buffer 7 is a compression damping type hydraulic damper. The cylinder 71 of the buffer 7 is fixed inside the bushing 4, and the piston rod 72 of the buffer 7 is connected to the slider 5.

[0026] The piston rod 72 is provided with a locking platform 73, and the slider 5 is provided with a locking groove 53. The port of the locking groove 53 is open, and the locking platform 73 passes through the open end of the locking groove 53 and is locked in the locking groove 53.

[0027] The slot 53 is T-shaped, with its upper cross-sectional width being smaller than its lower cross-sectional width and smaller than the diameter of the piston rod 72.

[0028] The slider 5 is provided with a lower spring post 52, and corresponding to the lower spring post 52, an upper spring post 41 is provided on the bushing 4. One end of the spring 8 is wrapped around the lower spring post 52 and presses against the end face of the slider 5, and the other end is wrapped around the upper spring post 41 and presses against the bushing 4. The spring 8 generates a thrust, pushing the slider 5 to move away from the bushing 4.

[0029] The hinge cup 2 has a positioning baffle 21 on its side wall, and the tail of the buffer 7 is pressed against the positioning baffle 21.

[0030] The hinge cup 2 has several snap-fit ​​holes 22 on its side wall, and the bushing 4 is provided with several elastic claws 42. The elastic claws 42 are installed in the snap-fit ​​holes 22 to fix the bushing 4 on the hinge cup 2.

[0031] Working principle: A bushing is provided on one outer end face of the hinge cup, and the buffer is installed inside the bushing. At the same time, a slider is slidably installed inside the bushing, and a rack is provided on the outside of the slider. The buffer is connected to the slider, and the buffer controls the running speed of the slider.

[0032] The hinge cup and the hinge arm are hinged together by an upper connecting rod and a lower connecting rod. The upper connecting rod and the lower connecting rod are hinged to the hinge cup through a hinge shaft. A gear is fixedly installed on the hinge shaft connected to the upper connecting rod or the lower connecting rod. The gear is coaxially fixedly connected to the upper connecting rod or the lower connecting rod through the hinge shaft.

[0033] In this design, the gear and rack mesh together. When the hinge cup closes, it transitions from an open to a closed state. The linkage motion of the upper or lower connecting rod is transmitted to the gear via the hinge shaft, which drives the gear to rotate. At this point, the gear meshes with the rack, driving the rack to move linearly. The rack's movement then drives the slider, which in turn drives the buffer. Since the buffer is a compression-damped type, the slider pushes the piston rod within the cylinder, providing damping force to the slider's movement. The two components work together to buffer and offset impact forces, thus achieving the buffering effect of the hinge during the closing process. The piston rod's locking mechanism and the slider's locking groove fit together tightly. The T-shaped structure of the locking groove ensures a stable connection between the slider and piston rod, while also facilitating user assembly of the buffer.

[0034] It should be noted that a recess 61 is provided inside the central rotating hole in the middle of the gear. Corresponding to the end face of the hinge shaft at the recess 61, a drive platform 34 is protruded. When the hinge begins to close, the drive platform 34 rotates freely in the recess 61. At this time, the hinge shaft has not yet driven the gear, and the gears do not rotate. Until the required buffer angle is reached, the drive platform 34 contacts and presses against the end face of the recess 61, bringing rotational force to the gear. The gear begins to rotate, and the gear meshes with the rack, driving the buffer to begin buffering. This allows the hinge to generate closing force only in the later stage of closing, making the hinge easier for the user to close.

[0035] In this case, the damper differs from the traditional design where it's embedded inside the hinge cup. Instead, it's mounted on the outside of the hinge cup, freeing it from the confines of the small internal space. This allows for a larger capacity design, significantly improving its cushioning performance. It's compatible with various hinge types and specifications, offering greater impact resistance and durability. Furthermore, the use of gears and racks ensures stable and reliable hinge movement during closing, preventing uneven force transmission that can occur with direct damping. This results in ideal cushioning, effectively protecting the damper body and extending its lifespan.

[0036] 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 buffer structure for a door hinge, comprising a hinge cup (2) and a hinge arm (1), wherein the hinge cup (2) and the hinge arm (1) are hinged together by an upper connecting rod (31) and a lower connecting rod (32), the upper connecting rod (31) and the lower connecting rod (32) swinging relative to the hinge cup (2) or the hinge arm (1) to realize the opening and closing of the door hinge, characterized in that: A bushing (4) is provided on one outer side of the hinge cup (2), and a buffer (7) is installed inside the bushing (4); a slider (5) is slidably installed inside the bushing (4), and a rack (51) is provided on the slider (5); the buffer (7) is connected to the slider (5) and is used to control the movement speed of the slider (5); The upper connecting rod (31) and the lower connecting rod (32) are hinged to the hinge cup (2) through the hinge shaft (33), and a gear (6) is fixedly installed on the hinge shaft (33) connected to the upper connecting rod (31) or the lower connecting rod (32). The gear (6) is coaxially fixedly connected to the upper connecting rod (31) or the lower connecting rod (32) through the hinge shaft (33). The gear (6) meshes with the rack (51), the hinge is closed, the gear (6) drives the rack (51) to move, so that the slider (5) pushes the buffer (7) to move, thereby generating a damping force when the door is closed.

2. The buffer structure of a door hinge according to claim 1, characterized in that: The buffer (7) is a compression damping type hydraulic damper. The cylinder (71) of the buffer (7) is fixed inside the bushing (4), and the piston rod (72) of the buffer (7) is connected to the slider (5).

3. The buffer structure of a door hinge according to claim 2, characterized in that: The piston rod (72) is provided with a locking platform (73), and the slider (5) is provided with a locking groove (53). The port of the locking groove (53) is open, and the locking platform (73) passes through the open end of the locking groove (53) and is locked in the locking groove (53).

4. The buffer structure of a door hinge according to claim 3, characterized in that: The slot (53) is T-shaped, with its upper section width being smaller than its lower section width and smaller than the diameter of the piston rod (72).

5. The buffer structure of a door hinge according to claim 1, characterized in that: The slider (5) is provided with a lower spring post (52), and corresponding to the lower spring post (52), an upper spring post (41) is provided on the bushing (4). One end of the spring (8) is looped around the lower spring post (52) and presses against the end face of the slider (5), and the other end is looped around the upper spring post (41) and presses against the bushing (4). The spring (8) generates a thrust, which pushes the slider (5) to move away from the bushing (4).

6. The buffer structure of a door hinge according to claim 1, characterized in that: The hinge cup (2) has a positioning stop (21) on its side wall, and the tail of the buffer (7) is pressed against the positioning stop (21).

7. The buffer structure of a door hinge according to claim 1, characterized in that: The hinge cup (2) has several snap-fit ​​holes (22) on its side wall, and the bushing (4) has several elastic claws (42). The elastic claws (42) are installed in the snap-fit ​​holes (22) to fix the bushing (4) on the hinge cup (2).

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