Hardware door hinge with external buffering function

Abstract

A hardware door hinge with an external buffering function comprises a hinge cup and hinge arms, the hinge cup and the hinge arms are hinged through an upper connecting rod and a lower connecting rod, a mounting base and a sliding block are arranged on one outer side face of the hinge cup, a buffer is fixed in the mounting base, the other end of the buffer is connected with the sliding block, and the buffer is used for limiting the movement speed of the sliding block. A driving seat is arranged on the inner side face of the hinge cup, one side of the driving seat extends outwards to form an insertion plate, correspondingly, a receding groove is formed in the inner side wall of the hinge cup, and the insertion plate 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, the outer side face of the upper connecting rod protrudes to form a driving table, the driving table is arranged away from the hinge point of the upper connecting rod and the upper hinge shaft, the driving base penetrates through a body of the driving base and is provided with a driving groove, and the driving table is sleeved with the driving groove. When the hinge is closed, the driving table drives the driving base to move through the driving groove, the sliding block pushes the buffer to move, and therefore resistance during door closing is generated.

Description

Technical Field

[0001] This utility model relates to a door hinge, specifically a hardware door hinge with an external buffer function. 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 a hardware door hinge with external buffer function that is simple in structure, low in manufacturing cost, has 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: a hardware door hinge with external buffer function, which includes a hinge cup and a hinge arm. The hinge cup is hinged to the hinge arm 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 realize the opening and closing of the door hinge. A mounting base and a slider are provided on one outer side of the hinge cup. The buffer is fixed in the mounting base. The other end of the buffer is connected to the slider. The buffer is used to limit the movement speed of the slider.

[0005] The inner side of the hinge cup is provided with a drive seat, and one side of the drive seat extends outward to form an insert plate. Correspondingly, a clearance groove is provided on the inner side wall of the hinge cup, and the insert plate 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. The outer side of the upper connecting rod protrudes to form a drive platform. The drive platform is located away from the hinge point between the upper connecting rod and the upper hinge shaft. The drive seat has a drive groove through its body. The drive groove is fitted outside the drive platform. When the hinge is closed, the drive platform drives the drive seat to move through the drive groove, causing the slider to push the buffer to move, thereby generating resistance when the door is closed.

[0007] The top of the drive groove is recessed to form a limiting groove. The width of the limiting groove is smaller than the minimum width of the drive table. The drive table presses against the limiting groove.

[0008] The drive platform has a sliding surface formed by the recess of the upper connecting rod body below it, and an inner limiting platform is provided on one side of the sliding surface; the drive seat extends inward to provide an outer limiting platform, and the inner limiting platform is locked on the outer limiting platform to push the drive seat to move.

[0009] 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.

[0010] The piston rod is provided with a locking platform, and the slider is provided with a locking groove. One end 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.

[0011] The other end of the card slot is provided with a slot through the slider body, and the insert plate is inserted into the slot through the clearance groove; the slot and the card slot are connected and clamp the card platform between the insert plate and the card slot.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] The limiting groove has a step protruding inwards from the drive platform, and the drive platform contacts the step to drive the drive seat to move.

[0017] The beneficial effects of this utility model are: 1. Simple structure, low manufacturing cost, and improved market competitiveness.

[0018] 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.

[0019] By using the upper linkage body for linkage buffering drive, the movement of the hinge during closing is stable and reliable, avoiding uneven force transmission caused by direct buffering, and the buffering effect is good. 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 This is a schematic diagram of the installation of the upper connecting rod in this utility model.

[0024] Figure 5 This is a structural assembly drawing of the upper connecting rod, drive seat, and mounting seat in this utility model.

[0025] Figure 6 This is a schematic diagram of the installation of the slider and mounting base in this utility model.

[0026] Figure 7 This is a schematic diagram of the upper connecting rod in this utility model.

[0027] Figure 8 This is a schematic diagram of the drive seat in this utility model. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings. A metal door hinge with an external buffer function includes a hinge cup 2 and a hinge arm 1. The hinge cup 2 is hinged to the hinge arm 1 through an upper connecting rod 3 and a lower connecting rod 10. The upper connecting rod 3 and the lower connecting rod 10 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 7 is fixed in the mounting base 4. The other end of the buffer 7 is connected to the slider 5. The buffer 7 is used to limit the movement speed of the slider 5.

[0029] The inner side of the hinge cup 2 is provided with a drive seat 6. One side of the drive seat 6 extends outward to form an insert plate 61. Correspondingly, an anti-cavity groove 21 is provided on the inner side wall of the hinge cup 2. The insert plate 61 passes through the anti-cavity groove 21 and is connected to the slider 5.

[0030] The upper connecting rod 3 and the lower connecting rod 10 are hinged to the hinge cup 2 via the upper hinge shaft 11 and the lower hinge shaft 12. The outer side of the upper connecting rod 3 protrudes to form a drive platform 31. The drive platform 31 is located away from the hinge point between the upper connecting rod 3 and the upper hinge shaft 11. The drive seat 6 has a drive groove 62 through its body. The drive groove 62 is fitted outside the drive platform 31. When the hinge is closed, the drive platform 31 drives the drive seat 6 to move through the drive groove 62, causing the slider 5 to push the buffer 7 to move, thereby generating resistance when the door is closed.

[0031] The top of the drive groove 62 is recessed to form a limiting groove 63. The width of the limiting groove 63 is smaller than the minimum width of the drive platform 31. The drive platform 31 presses against the limiting groove 63.

[0032] The driving platform 31 has a sliding surface 32 formed by the recess of the upper connecting rod 3 body below it. An inner limiting platform 33 is provided on one side of the sliding surface 32. The driving seat 6 extends inward to provide an outer limiting platform 65. The inner limiting platform 33 is locked on the outer limiting platform 65 to push the driving seat 6 to move.

[0033] The buffer 7 is a compression damping type hydraulic damper. The cylinder 71 of the buffer 7 is fixed in the mounting base 4, and the piston rod 72 of the buffer 7 is connected to the slider 5.

[0034] The piston rod 72 is provided with a locking platform 73, and the slider 5 is provided with a locking groove 51. One end of the locking groove 51 is open, and the locking platform 73 passes through the open end of the locking groove 51 and is locked in the locking groove 51.

[0035] The other end of the card slot 51 passes through the slider 5 body and is provided with a slot 52. The insert plate 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 holder 73 is clamped between the insert plate 61 and the card slot 51.

[0036] 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 72.

[0037] The slider 5 is provided with an upper spring post 53, and correspondingly, the mounting base 4 is provided with a lower spring post 41. One end of the spring 8 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 8 generates a thrust, pushing the slider 5 to move away from the mounting base 4.

[0038] 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.

[0039] The mounting base 4 has an oblique mounting groove 42 on its outer wall, and a hinge hole is provided through the inner wall of the mounting groove 42. The upper hinge shaft 11 and the lower hinge shaft 12 are connected by a connecting shaft 13. The upper hinge shaft 11 is inserted into the hinge hole to fix the mounting base 4 on the outer side of the hinge cup 2.

[0040] The limiting groove 63 is provided with a step 64 protruding inward in the direction of the groove, corresponding to the position of the driving platform 31. The driving platform 31 contacts the step 64 and pushes the driving seat 6 to move.

[0041] 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.

[0042] 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 axis, and the lower connecting rod is hinged to the lower hinge axis. A drive platform is formed protruding from the outer side of the upper connecting rod, and the drive platform is distributed away from the hinge point between the upper connecting rod and the upper hinge axis.

[0043] A drive seat is provided on the inner side of the hinge cup. A plate extending outward from the drive seat passes through the clearance groove of the hinge cup and connects to the slider, thus synchronizing the movement of the drive seat with the movement of the slider. Corresponding to the position of the drive platform, a drive groove is provided inside the drive seat, and the drive platform is fitted inside. When the hinge cup closes, it transitions from the open to the closed state. The upper connecting rod drives the drive platform to rotate. At this time, the drive platform is locked at the top of the drive groove, driving the drive seat to move linearly, which in turn drives the slider to drive the buffer for buffering.

[0044] 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.

[0045] It should be noted that a sliding surface is formed by the recess of the upper connecting rod body below the drive platform, and an inner limiting platform protrudes from one end of this sliding surface. Simultaneously, an outer limiting platform extends inward from the drive seat end. When the upper connecting rod begins to rotate, the outer limiting platform rotates relative to the sliding door. At this time, the drive platform has not yet made contact with the step at the top of the drive groove, and the drive platform does not drive the drive seat; the drive seat remains stationary. Only when the desired buffer angle is reached does the inner and outer limiting platforms engage in abutment. The inner limiting platform generates driving force on the drive seat through the outer limiting platform, and the drive platform engages in abutment with the step of the drive groove, thus providing driving force to the drive seat and causing the buffer to begin buffering. Therefore, this hinge does not engage buffering in the initial closing stage; buffering only occurs after closing to the set angle, making the hinge easier to close.

[0046] Furthermore, in this case, unlike the traditional method of embedding the buffer inside the hinge cup, the buffer is installed on the outside of the hinge cup. This frees the buffer from the confines of the narrow space inside the hinge cup, allowing for a larger capacity design and significantly improving its cushioning performance. It is compatible with various hinge types and specifications, offering stronger impact resistance and durability. Simultaneously, the upper connecting rod body is used for linkage and buffering drive, with both working in tandem to ensure stable and reliable hinge movement during closing. This avoids uneven force transmission caused by direct buffering, resulting in ideal cushioning performance, effectively protecting the buffer body and extending its service life.

[0047] In addition, in this case, 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.

[0048] Furthermore, a guide platform is provided at the slider end. The guide platform extends and is installed in the clearance groove of the hinge cup to guide the movement trajectory of the slider, ensuring the correct operation of the slider and guaranteeing that the buffer can operate normally, stably, and efficiently for a long time. Therefore, it can be widely used.

[0049] 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 hardware door hinge with a buffer function, comprising a hinge cup (2) and a hinge arm (1), the hinge cup (2) is hinged with the hinge arm (1) through an upper connecting rod (3) and a lower connecting rod (10), the upper connecting rod (3) and the lower connecting rod (10) 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 outer side of the hinge cup (2) is provided with a mounting seat (4) and a sliding block (5), a buffer (7) is fixed in the mounting seat (4), and the other end of the buffer (7) is connected with the sliding block (5), and the buffer (7) is used for limiting the movement speed of the sliding block (5); ​ The inner side of the hinge cup (2) is provided with a driving seat (6), one side of the driving seat (6) extends outward to form an insertion plate (61), and correspondingly, a clearance groove (21) is formed in the inner side wall of the hinge cup (2), and the insertion plate (61) is connected with the sliding block (5) through the clearance groove (21); The outer side of the upper connecting rod (3) protrudes to form a driving table (31), the driving table (31) is away from the hinge joint point of the upper connecting rod (3) and the upper hinge shaft (11), the driving groove (62) is formed in the body of the driving seat (6), the driving groove (62) is sleeved outside the driving table (31), and when the hinge is closed, the driving table (31) drives the driving seat (6) to move through the driving groove (62), so that the sliding block (5) drives the buffer (7) to move, thereby generating resistance when closing the door.

2. The hardware door hinge with the out-of-band buffering function according to claim 1, characterized in that: The top of the driving groove (62) is recessed to form a limiting groove (63), the cross-sectional width of the limiting groove (63) is smaller than the minimum cross-sectional width of the driving table (31), and the driving table (31) is pressed against the limiting groove (63).

3. The hardware door hinge with the out-of-band buffering function according to claim 1, characterized in that: The driving table (31) is recessed from the body of the upper connecting rod (3) to form a sliding surface (32), one side end of the sliding surface (32) protrudes to form an inner limiting table (33); the driving seat (6) extends inward to form an outer limiting table (65), the inner limiting table (33) is clamped on the outer limiting table (65), and the driving seat (6) is driven to move.

4. The hardware door hinge with the out-of-band buffering function according to claim 1, characterized in that: The buffer (7) is a compression damping type hydraulic damper, the cylinder body (71) of the buffer (7) is partially fixed in the mounting seat (4), and the piston rod (72) of the buffer (7) is connected with the sliding block (5).

5. The hardware door hinge with the out-of-band buffering function according to claim 4, characterized in that: The piston rod (72) is provided with a clamping table (73), the sliding block (5) is provided with a clamping groove (51), one end of the clamping groove (51) is open, the clamping table (73) passes through the open end of the clamping groove (51) and is clamped in the clamping groove (51); The other end of the clamping groove (51) penetrates the body of the sliding block (5) to form an insertion groove (52), the insertion plate (61) is inserted into the insertion groove (52) through the clearance groove (21); the insertion groove (52) and the clamping groove (51) are in communication, and the clamping table (73) is clamped between the insertion plate (61) and the clamping groove (51).

6. The hardware door hinge with the out-of-band buffering function according to claim 5, characterized in that: The clamping groove (51) is arranged in a T shape, the upper end cross-sectional width thereof is smaller than the lower end cross-sectional width, and is smaller than the diameter of the piston rod (72).

7. The hardware door hinge with the out-of-band buffering function according to claim 1, characterized in that: The slider (5) is provided with an upper spring post (53), and correspondingly, the mounting seat (4) is provided with a lower spring post (41). One end of the spring (8) is sleeved on the upper spring post (53) and is pressed against the end surface of the slider (5). The other end of the spring (8) is sleeved on the lower spring post (41) and is pressed against the end surface of the mounting seat (4). The spring (8) generates a pushing force to push the slider (5) to move away from the mounting seat (4).

8. The hardware door hinge with the out-of-band buffering function according to claim 1, characterized in that: The avoidance slot (21) is arranged through the side surface of the hinge cup (2), the end of the slider (5) is provided with a guide table (54), the guide table (54) extends into the avoidance slot (21) and slides along the avoidance slot (21).

9. The hardware door hinge with the out-of-band buffering function according to claim 1, characterized in that: The mounting seat (4) is obliquely provided with a mounting slot (42) on the outer wall, a hinge hole is arranged through the inner wall of the mounting slot (42), the upper hinge shaft (11) and the lower hinge shaft (12) are connected through a connecting shaft (13), the upper hinge shaft (11) penetrates the hinge hole to fix the mounting seat (4) on the outer side surface of the hinge cup (2).

10. The hardware door hinge with the out-of-band buffering function according to claim 2, characterized in that: The limiting slot (63) is correspondingly provided with a step (64) protruding into the slot at the position of the driving table (31), and the driving table (31) is in contact with the step (64) to push the driving seat (6) to move.

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