External linkage buffer door hinge

Abstract

An external linkage buffering 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 mounting seat and a sliding block are arranged on one outer side face of the hinge cup, a buffer is fixed in the mounting seat, and the other end of the buffer is connected with the sliding block. The buffer is used for controlling the movement speed of the sliding block. A driving seat is arranged on the inner side face of the hinge cup, one end of the driving seat extends outwards to form a driving table, correspondingly, a receding groove is formed in the side wall of the hinge cup, and the driving table penetrates through the receding groove to be connected with the sliding block. The upper connecting rod and the lower connecting rod are hinged to the hinge cup through an upper hinge shaft and a lower hinge shaft, a gear is installed on the upper hinge shaft or the lower hinge shaft, a gear groove is formed in the driving base, the gear is meshed with the gear groove, and when the hinge is closed, the gear drives the driving base to move through the gear groove, so that the sliding block pushes the buffer to move. Therefore, damping force during door closing is generated.

Description

Technical Field

[0001] This utility model relates to a door hinge, specifically an external linkage buffer door hinge. 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 inadequate cushioning 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 its widespread use. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of existing technologies and provide an external linkage buffer door hinge 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 in the following way: an external linkage buffer door hinge, which includes a hinge cup and a hinge arm. 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 swing relative to the hinge cup or the hinge arm to realize the opening and closing of the door hinge. A mounting seat and a slider are provided on one outer side of the hinge cup. The buffer is fixed in the mounting seat. The other end of the buffer is connected to the slider. The buffer is used to control the movement speed of the slider.

[0005] The inner side of the hinge cup is provided with a drive seat, one end of which extends outward to form a drive platform. Correspondingly, a clearance groove is provided on the side wall of the hinge cup, and the drive platform passes through the clearance groove to connect with the slider.

[0006] The upper and lower connecting rods are hinged to the hinge cup via the upper and lower hinge shafts. A gear is installed on the upper or lower hinge shaft, and a gear groove is provided on the drive seat. The gear meshes with the gear groove, the hinge is closed, and the gear drives the drive seat to move through the gear groove, causing the slider to push the buffer to move, thereby generating a damping force when the door is closed.

[0007] The buffer is a compression damping type hydraulic damper. The cylinder part of the buffer is fixed in the mounting base, and the piston rod of the buffer is connected to the slider.

[0008] 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.

[0009] The other end of the card slot is provided with a slot through the slider body, and the drive platform is inserted into the slot through the clearance groove; the slot and the card slot are connected and clamp the card platform between the drive platform and the card slot.

[0010] 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.

[0011] The slider is provided with an upper spring post, and correspondingly, a lower spring post is provided on the mounting base. One end of the spring is looped around the upper spring post and presses against the end face of the slider; the other end is looped around the lower spring post and presses against the end face of the mounting base. The spring generates a thrust, pushing the slider to move away from the mounting base.

[0012] The aforementioned clearance groove is provided through the side of the hinge cup, and the slider end protrudes from the end face of the main body and is provided with a guide platform, which extends into the clearance groove and slides along the clearance groove.

[0013] The gear is fixedly connected to the upper or lower hinge shaft via a bushing.

[0014] The mounting base has an oblique mounting groove on its outer wall, and a hinge hole is provided through the inner wall of the mounting groove. The upper hinge shaft and the lower hinge shaft are connected by a connecting shaft. The upper hinge shaft is inserted into the hinge hole to fix the mounting base on the outer side of the hinge cup.

[0015] The lower end face of the drive seat is provided with a sliding surface, which slides on the bottom of the hinge cup.

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

[0017] 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.

[0018] By utilizing the interlocking of gears and gear slots, the movement of the hinge during closure is ensured to be stable and reliable, avoiding uneven force transmission caused by direct buffering. This results in an ideal buffering effect, protects the buffer body, and extends its service life.

[0019] The buffer is automatically reset by a spring, which further improves the user's convenience and efficiency and ensures the buffering effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the open state of the door hinge in this utility model.

[0021] Figure 2 This is a schematic diagram of the closed state of the door hinge in this utility model.

[0022] Figure 3 This is a structural assembly drawing of the hinge cup and hinge arm in this utility model.

[0023] Figure 4-5 This is a schematic diagram of the installation of the concealed sliding hinge cup and hinge arm in this utility model.

[0024] Figure 6 This is a structural assembly drawing of the mounting base, slider, and drive base in this utility model. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings. An external linkage buffer door hinge 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 mounting base 4 and a slider 5 are provided on one outer side of the hinge cup 2. A buffer 9 is fixed in the mounting base 4. The other end of the buffer 9 is connected to the slider 5. The buffer 9 is used to control the movement speed of the slider 5.

[0026] The inner side of the hinge cup 2 is provided with a drive seat 6. One end of the drive seat 6 extends outward to form a drive platform 61. Correspondingly, a clearance groove 21 is provided on the side wall of the hinge cup 2. The drive platform 61 passes through the clearance groove 21 and connects with the slider 5.

[0027] The upper connecting rod 31 and the lower connecting rod 32 are hinged to the hinge cup 2 via the upper hinge shaft 71 and the lower hinge shaft 72. A gear 8 is installed on the upper hinge shaft 71 or the lower hinge shaft 72. A gear groove 62 is provided on the drive seat 6. The gear 8 meshes with the gear groove 62. When the hinge is closed, the gear 8 drives the drive seat 6 to move through the gear groove 62, causing the slider 5 to push the buffer 9 to move, thereby generating a damping force when the door is closed.

[0028] The buffer 9 is a compression damping type hydraulic damper. The cylinder 91 of the buffer 9 is fixed in the mounting base 4, and the piston rod 92 of the buffer 9 is connected to the slider 5.

[0029] The piston rod 92 is provided with a locking platform 63, and the slider 5 is provided with a locking groove 51. The port of the locking groove 51 is open, and the locking platform 63 passes through the open end of the locking groove 51 and is locked in the locking groove 51.

[0030] The other end of the card slot 51 passes through the slider 5 body and is provided with a slot 52. The drive platform 61 passes through the clearance groove 21 and is inserted into the slot 52. The slot 52 is connected to the card slot 51, and the card platform 63 is clamped between the drive platform 61 and the card slot 51.

[0031] The slot 51 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 92.

[0032] The slider 5 is provided with an upper spring post 53, and correspondingly, a lower spring post 41 is provided on the mounting base 4. One end of the spring 10 is looped around the upper spring post 53 and presses against the end face of the slider 5; the other end is looped around the lower spring post 41 and presses against the end face of the mounting base 4. The spring 10 generates a thrust, pushing the slider 5 to move away from the mounting base 4.

[0033] The clearance groove 21 is provided through the side of the hinge cup 2. The slider 5 is provided with a guide platform 54 protruding from the end face of the main body. The guide platform 54 extends into the clearance groove 21 and slides along the clearance groove 21.

[0034] The gear 8 is fixedly connected to the upper hinge shaft 71 or the lower hinge shaft 72 via a bushing 81.

[0035] The mounting base 4 has an oblique mounting groove on its outer wall, and a hinge hole is provided through the inner wall of the mounting groove. The upper hinge shaft 71 and the lower hinge shaft 72 are connected by a connecting shaft 73. The upper hinge shaft 71 is inserted into the hinge hole to fix the mounting base 4 on the outer side of the hinge cup 2.

[0036] The lower end face of the drive seat 6 is provided with a sliding surface, which slides on the bottom of the hinge cup 2.

[0037] Working principle: A mounting base is provided on one outer end face of the hinge cup, and the buffer is fixedly connected in the mounting base. At the same time, a slider is provided above the mounting base, and the piston rod of the buffer is connected to the slider, thereby controlling the running speed of the slider using the buffer.

[0038] The hinge cup and the hinge arm are hinged together by an upper connecting rod and a lower connecting rod. The upper connecting rod is hinged to the upper hinge shaft, and the lower connecting rod is hinged to the lower hinge shaft. The two hinge shafts are connected as one unit by a connecting shaft. A gear is fixedly installed on the upper or lower hinge shaft by a bushing, and the gear is coaxially fixedly connected to the upper or lower connecting rod.

[0039] The hinge cup has a drive seat on its inner side. A drive platform extending outward from this drive seat connects to the slider, synchronizing the movement of the drive platform with that of the slider. Corresponding to the gear positions, the drive seat has several gear slots. The gears mesh with these slots. When the hinge cup closes, it transitions from an open to a closed state. The upper or lower hinge shaft drives the gears to rotate, engaging them with the gear slots. This drives the drive seat in linear motion, which in turn drives the slider to operate the buffer.

[0040] Furthermore, since the buffer is a compression-damping type damper, the slider pushes the piston rod to move within the cylinder, providing a certain damping force to the slider's movement. The two work together to buffer and offset the impact force, thus achieving the buffering effect of the door hinge during the closing process. Specifically, the piston rod's locking platform 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 the piston rod, while also facilitating the user's assembly of the buffer.

[0041] It should be noted that when the upper or lower linkage begins to rotate, the gear and gear slot have not yet engaged. The gear spins freely on the end face of the drive seat, without driving the drive seat, which remains stationary. Only when the required buffer angle is reached does the gear engage with the gear slot, providing driving force to the drive seat. This force is transmitted to the slider through the drive seat's movement, causing the buffer to begin buffering. This design ensures that the hinge does not participate in buffering during the initial closing phase, making closing the door easier and more convenient for the user.

[0042] 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 interlocking gears and gear slots ensure 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.

[0043] In addition, an upper spring post is provided on the slider, and a lower spring post is provided on the mounting base corresponding to the position of the upper spring post. One end of the spring is wrapped around the upper spring post and presses against the end face of the slider; while the other end of the spring is wrapped around the lower spring post and presses against the end face of the mounting base. The spring generates an outward pushing force on the slider body, constantly pushing the slider to move away from the end of the mounting base, causing the buffer to return to the initial position, providing a buffer basis for the next opening and closing of the door hinge.

[0044] Furthermore, a guide platform is provided at the end of the slider. The guide platform extends and is installed in the clearance groove of the hinge cup, which guides and restricts the movement trajectory of the slider, ensuring that the slider can work stably and smoothly for a long time. Therefore, it can be widely used.

[0045] 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. An external linkage buffer 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), and 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, characterized in that: The hinge cup (2) is provided with a mounting base (4) and a slider (5) on one outer side. The buffer (9) is fixed in the mounting base (4). The other end of the buffer (9) is connected to the slider (5). The buffer (9) is used to control the movement speed of the slider (5). The inner side of the hinge cup (2) is provided with a drive seat (6), one end of the drive seat (6) extends outward to form a drive platform (61). Correspondingly, a clearance groove (21) is provided on the side wall of the hinge cup (2), and the drive platform (61) passes through the clearance groove (21) and connects with the slider (5). The upper connecting rod (31) and the lower connecting rod (32) are hinged to the hinge cup (2) through the upper hinge shaft (71) and the lower hinge shaft (72). A gear (8) is installed on the upper hinge shaft (71) or the lower hinge shaft (72). A gear groove (62) is provided on the drive seat (6). The gear (8) meshes with the gear groove (62). When the hinge is closed, the gear (8) drives the drive seat (6) to move through the gear groove (62), causing the slider (5) to push the buffer (9) to move, thereby generating a damping force when the door is closed.

2. The external linkage buffer door hinge according to claim 1, characterized in that: The buffer (9) is a compression damping type hydraulic damper. The cylinder (91) of the buffer (9) is fixed in the mounting base (4), and the piston rod (92) of the buffer (9) is connected to the slider (5).

3. The external linkage buffer door hinge according to claim 2, characterized in that: The piston rod (92) is provided with a locking platform (63), and the slider (5) is provided with a locking groove (51). The port of the locking groove (51) is open, and the locking platform (63) passes through the open end of the locking groove (51) and is locked in the locking groove (51).

4. The external linkage buffer door hinge according to claim 3, characterized in that: The other end of the card slot (51) passes through the body of the slider (5) and is provided with a slot (52). The drive platform (61) passes through the clearance groove (21) and is inserted into the slot (52). The slot (52) and the card slot (51) are connected and the card platform (63) is clamped between the drive platform (61) and the card slot (51).

5. The external linkage buffer door hinge according to claim 3, characterized in that: The slot (51) is T-shaped, with its upper section width being smaller than its lower section width and smaller than the diameter of the piston rod (92).

6. The external linkage buffer door hinge according to claim 1, characterized in that: The slider (5) is provided with an upper spring post (53), and correspondingly, a lower spring post (41) is provided on the mounting base (4). One end of the spring (10) is looped around the upper spring post (53) and presses against the end face of the slider (5); the other end is looped around the lower spring post (41) and presses against the end face of the mounting base (4). The spring (10) generates a thrust, which pushes the slider (5) to move away from the mounting base (4).

7. The external linkage buffer door hinge according to claim 1, characterized in that: The clearance groove (21) is provided through the side of the hinge cup (2), and the slider (5) is provided with a guide platform (54) protruding from the end face of the main body. The guide platform (54) extends into the clearance groove (21) and slides along the clearance groove (21).

8. The external linkage buffer door hinge according to claim 1, characterized in that: The gear (8) is fixedly connected to the upper hinge shaft (71) or the lower hinge shaft (72) by a bushing (81).

9. The external linkage buffer door hinge according to claim 1, characterized in that: The mounting base (4) has an oblique mounting groove on its outer wall and a hinge hole is provided through the inner wall of the mounting groove. The upper hinge shaft (71) and the lower hinge shaft (72) are connected by a connecting shaft (73). The upper hinge shaft (71) is inserted into the hinge hole to fix the mounting base (4) on the outer side of the hinge cup (2).

10. The external linkage buffer door hinge according to claim 1, characterized in that: The lower end face of the drive seat (6) is provided with a sliding surface, which slides on the bottom of the hinge cup (2).

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