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] The invention relates to a door hinge, in particular to a buffer structure of the door hinge. Background Art

[0002] In order to improve the comfort of hinges and extend their service life, buffered hardware hinges have emerged. They mainly achieve smooth buffering during the opening and closing of hinges by setting a damping device to prevent the impact and noise caused by rapid closing. In the prior art, buffered hardware hinges usually set the damping device inside the hinge cup or the hinge arm. The internal space of the hinge cup and the hinge arm is limited, and the installation position of the damping device is greatly restricted. In traditional technology, in order to cope with the narrow installation space, the buffer needs to be designed to be relatively small, so its volume is usually small, which directly leads to a narrow range of impact forces that the buffer can withstand. The smaller buffer cannot provide sufficient buffering effect, so the buffer is subjected to greater stress. The buffer is prone to wear during long-term operation, which accelerates the performance degradation of the buffer and shortens its service life, eventually causing the buffer to be damaged or unable to achieve the expected buffering effect. The unsatisfactory buffering effect also increases the risk of noise generation, and cannot meet the demand for silent performance. At the same time, the buffer and other components need to be assembled in a very compact structure, which is difficult to install and has high installation costs, which is not conducive to the widespread use of hinges. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a door hinge buffer structure with simple structure, low production cost, ideal buffering effect, convenient disassembly and assembly, improved impact resistance and pressure resistance, and suitable for use with door hinges of various types and specifications.

[0004] The object of the present invention is achieved in the following manner: a buffer structure of a door hinge, which includes a hinge cup and a hinge arm, the hinge cup and the hinge arm are hinged 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, an outer side surface of the hinge cup is provided with a shaft sleeve, and the buffer is installed in the shaft sleeve; a slider is slidably installed in the shaft sleeve, 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; The upper connecting rod and the lower connecting rod are hinged to the hinge cup through a hinge shaft, and a gear is fixedly installed on the hinge shaft connected to the upper connecting rod or the lower connecting rod, and the gear is coaxially fixedly connected to the upper connecting rod or the lower connecting rod through the hinge shaft; the gear is meshed with the rack, and when the hinge is closed, the gear drives the rack to move, so that the slider pushes the buffer to move, thereby generating a damping force when closing the door.

[0005] The buffer is a compression damping type hydraulic damper, the cylinder body of the buffer is fixed in the shaft sleeve, and the piston rod of the buffer is connected with the sliding block.

[0006] The piston rod is provided with a clamping platform, the slider is provided with a clamping slot, the end of the clamping slot is open, the clamping platform passes through the open end of the clamping slot and is clamped in the clamping slot.

[0007] The clamping groove is arranged in a T-shape, and the width of the upper section is smaller than the width of the lower section, and is also smaller than the diameter of the piston rod.

[0008] The slider is provided with a lower spring column, and an upper spring column is provided on the sleeve corresponding to the lower spring column. One end of the spring is looped on the lower spring column and pressed against the end surface of the slider, and the other end is looped on the upper spring column and pressed against the sleeve. The spring generates thrust to push the slider and the sleeve to move away from each other.

[0009] A positioning stop is provided on the side wall of the hinge cup, and the tail of the buffer is pressed on the positioning stop.

[0010] The side wall of the hinge cup is provided with a plurality of buckle holes, and the shaft sleeve is provided with a plurality of elastic claws, which are installed in the buckle holes to fix the shaft sleeve on the hinge cup.

[0011] The beneficial effects of the present invention are: 1. Simple structure, low production cost and improved market competitiveness.

[0012] The buffer is installed on the outside of the hinge cup and is no longer limited by the narrow space inside the hinge cup. This significantly improves the buffer's buffering performance and is suitable for installation and use on hinges of various types and specifications, with stronger impact resistance and durability.

[0013] The gear and rack cooperate with each other to ensure stable and reliable movement of the hinge during closing.

[0014] The buffer is set on the outside, which improves the overall appearance of the hinge and makes the structure neater. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the open state of the door hinge in the present invention.

[0016] Figure 2 It is a schematic diagram of the closed state of the door hinge in the present invention.

[0017] Figure 3 The figure is a schematic diagram of the installation of the rear buffer after the hidden slider in the present invention.

[0018] Figure 4 It is a schematic diagram of the installation of the buffer and the shaft sleeve in the present invention.

[0019] Figure 5 It is a structural schematic diagram of the shaft sleeve in the present invention.

[0020] Figure 6It is a schematic diagram of the structure of the buffer in the present invention.

[0021] Figure 7 It is a structural assembly diagram of the gears and articulated shafts in the present invention. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below with reference to the accompanying drawings. 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 hingedly connected via an upper connecting rod 31 and a lower connecting rod 32, wherein 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, wherein a shaft sleeve 4 is provided on an outer side of the hinge cup 2, and a buffer 7 is installed in the shaft sleeve 4; a slider 5 is slidably installed in the shaft sleeve 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, and 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 is meshed with the rack 51, and the hinge is closed, and 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 closing the door.

[0023] The buffer 7 is a compression damping type hydraulic damper. The cylinder body 71 of the buffer 7 is partially fixed in the shaft sleeve 4 , and the piston rod 72 of the buffer 7 is connected to the slider 5 .

[0024] The piston rod 72 is provided with a clamping platform 73 , and the slider 5 is provided with a clamping slot 53 . The end of the clamping slot 53 is open, and the clamping platform 73 passes through the open end of the clamping slot 53 and is clamped in the clamping slot 53 .

[0025] The clamping groove 53 is T-shaped, and the width of the upper section is smaller than the width of the lower section, and is also smaller than the diameter of the piston rod 72 .

[0026] The slider 5 is provided with a lower spring column 52, and an upper spring column 41 is provided on the sleeve 4 corresponding to the lower spring column 52. One end of the spring 8 is looped on the lower spring column 52 and pressed against the end face of the slider 5, and the other end is looped on the upper spring column 41 and pressed against the sleeve 4. The spring 8 generates a thrust to push the slider 5 and the sleeve 4 to move away from each other.

[0027] A positioning stop 21 is provided on the side wall of the hinge cup 2 , and the tail of the buffer 7 is pressed on the positioning stop 21 .

[0028] The side wall of the hinge cup 2 is provided with a plurality of buckle holes 22 , and the shaft sleeve 4 is provided with a plurality of elastic claws 42 . The elastic claws 42 are installed in the buckle holes 22 to fix the shaft sleeve 4 on the hinge cup 2 .

[0029] Working principle: A sleeve is provided on the outer end surface of one side of the hinge cup, and a buffer is installed inside the sleeve. At the same time, a slider is slidably installed inside the sleeve, and a rack is provided outside the slider. The buffer is connected to the slider, and the running speed of the slider is controlled by the buffer.

[0030] The hinge cup and the hinge arm are hinged by an upper connecting rod and a lower connecting rod, wherein the upper connecting rod and the lower connecting rod are hinged to the hinge cup by a hinge shaft, and a gear is fixedly installed on the hinge shaft connected to the upper connecting rod or the lower connecting rod, and the gear is coaxially fixedly connected to the upper connecting rod or the lower connecting rod through the hinge shaft.

[0031] Among them, the gear and the rack are meshed and assembled. When the hinge cup is closed, the hinge cup transitions from the open state to the closed state. The linkage movement of the upper connecting rod or the lower connecting rod is transmitted to the gear through the hinge shaft. The hinge shaft drives the gear to rotate. At this time, the gear and the rack are meshed, thereby driving the rack to move linearly. When the rack moves, it can drive the slider to drive the buffer to work. At this time, since the buffer is a compression damping damper, the slider pushes the piston rod to move in the cylinder body, providing a certain damping force for the movement of the slider. The two cooperate with each other to buffer and offset the impact force, thereby realizing the buffering effect of the hinge during the closing process. Among them, the piston rod's card platform and the slider's card slot are closely matched with each other. The T-shaped structure of the card slot ensures the stable connection between the slider and the piston rod, and is convenient for users to assemble the buffer.

[0032] It should be noted that a vacant position 61 is provided inside the central rotating hole provided in the middle of the gear, and a driving platform 34 is formed on the end face of the hinge shaft corresponding to the vacant position 61. When the hinge starts to close, the driving platform 34 idles in the vacant position 61. At this time, the hinge shaft has not yet driven the gear, and the gears do not rotate. When the required buffering angle is reached, the driving platform 34 contacts and presses against the end face of the vacant position 61, bringing a rotating force to the gear, the gear starts to rotate, the gear and the rack mesh and drive, driving the buffer to start buffering, so that the hinge generates a closing force in the latter stage of closing the door, thereby making the hinge lighter when the user operates to close it.

[0033] In this case, the buffer is different from the traditional one that is embedded inside the hinge cup. The buffer is installed on the outside of the hinge cup, so that the buffer is no longer limited by the narrow space inside the hinge cup. The buffer can be designed with a larger capacity, which significantly improves the buffer's buffering performance and is suitable for installation and use of hinges of various types and specifications. It has stronger impact resistance and durability. At the same time, the use of gears and racks to cooperate with each other ensures that the hinge moves stably and reliably during closing, avoiding the uneven force transmission caused by direct buffering of the buffer. The buffering effect is ideal, which well protects the buffer body and extends its service life.

[0034] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

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 hingedly connected via 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: A shaft sleeve (4) is provided on an outer side surface of the hinge cup (2), and a buffer (7) is installed in the shaft sleeve (4); a slider (5) is slidably installed in the shaft sleeve (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) via a hinge shaft (33), and a gear (6) is fixedly mounted on the hinge shaft (33) connected to the upper connecting rod (31) or the lower connecting rod (32), and 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) is meshed with the rack (51), and when 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 body (71) of the buffer (7) is fixed in the shaft sleeve (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 clamping platform (73), the slider (5) is provided with a clamping slot (53), the end of the clamping slot (53) is open, and the clamping platform (73) passes through the open end of the clamping slot (53) and is clamped in the clamping slot (53).

4. The buffer structure of a door hinge according to claim 3, characterized in that: The clamping groove (53) is arranged in a T-shape, and the width of the cross section at the upper end is smaller than the width of the cross section at the lower end, and is also 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 column (52), and an upper spring column (41) is provided on the shaft sleeve (4) corresponding to the lower spring column (52). One end of the spring (8) is looped on the lower spring column (52) and pressed against the end surface of the slider (5), and the other end is looped on the upper spring column (41) and pressed against the shaft sleeve (4). The spring (8) generates a thrust to push the slider (5) and the shaft sleeve (4) to move away from each other.

6. The buffer structure of a door hinge according to claim 1, characterized in that: A positioning stopper (21) is provided on the side wall of the hinge cup (2), and the rear end of the buffer (7) is pressed against the positioning stopper (21).

7. The buffer structure of a door hinge according to claim 1, characterized in that: The side wall of the hinge cup (2) is provided with a plurality of snap holes (22), and the shaft sleeve (4) is provided with a plurality of elastic claws (42). The elastic claws (42) are installed in the snap holes (22) to fix the shaft sleeve (4) on the hinge cup (2).

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