A hydraulic buffer hinge

Abstract

The present invention belongs to the field of hardware machinery technology. The present invention discloses a hydraulic buffer 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 hinge arm is provided with a receiving chamber, a guide shell is installed in the receiving chamber, a slide is provided in the guide shell, and a slider is slidably installed in the slide; it also includes a driving arm arranged at the tail of the lower connecting rod, the driving arm extends into the slide and is connected with the slider; it also includes a damper arranged in the receiving chamber, the cylinder part or the piston rod part of the damper extends into the slide and contacts with the slider. The beneficial effect of the present invention is that by providing a receiving chamber, a guide shell and a slide in the hinge arm, and slidably installing the slider in the slide, the driving arm and the damper are connected by the slider. This design effectively transmits the damping force of the damper, ensures that the hinge has a stable and controllable buffering effect during the opening and closing process, and avoids the problem of unstable buffering caused by improper clearance in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of hardware hinges, in particular to a hydraulic buffer hinge. Background Art

[0002] As an important component connecting cabinet doors and cabinet bodies, hardware hinges are widely used in furniture, doors and windows, etc. In practical applications, the opening and closing action of the hinge needs to have a certain buffering function to avoid impact on the connecting parts or users when closing quickly. Therefore, hydraulic buffer hinges are gradually favored by the market because they can provide smooth and controllable opening and closing actions.

[0003] As disclosed in Chinese patent numbers: 2015207027842; 2011201225080; 2016211894445, the hydraulic buffer hinge in the prior art usually adopts a structural design in which the damper is connected to the lower connecting rod through a pull rod. Specifically, hinge holes are provided at both ends of the pull rod, one end is connected to the damper through the hinge hole, and the other end is connected to the hinge shaft on the lower connecting rod through the hinge hole. Although this structural design can achieve basic buffering functions, it has many disadvantages in actual use, which are mainly manifested in the following aspects:

[0004] 1. Clearance fit problem: In the existing structure, the through-hole hinge hole and the hinge shaft are usually coaxially matched. However, due to the limitations of manufacturing tolerance and assembly accuracy, the size of the gap is difficult to accurately control. If the gap between the through-hole and the hinge shaft is too small, it will inevitably cause the hinge to get stuck during the opening and closing process, affecting its smoothness; conversely, if the gap is too large, when the hinge is closed, due to the large gap between the through-hole and the hinge shaft, the hinge is prone to shaking, affecting its stability and user experience.

[0005] 2. Limited contact area: In the existing structure, the contact area between the hinge hole and the hinge shaft is small, mainly concentrated in a small area of ​​the circumference. This design causes the contact stress to be concentrated in a limited area during the opening and closing process of the hinge, which is easy to aggravate local wear and shorten the service life of the hinge.

[0006] 3. Wear and gap expansion: With the long-term use of the hinge, the contact surface between the hinge hole and the hinge shaft will gradually wear, causing the original gap to further increase. The expansion of the gap not only exacerbates the shaking of the hinge, but may also lead to a decrease in the buffering effect, making it impossible to achieve smooth buffering at small angles. In addition, after the gap increases, the overall structural stability of the hinge decreases, and it is easy to loosen or fail during frequent use, affecting the reliability of the product and user experience.

[0007] 4. Insufficient buffering effect: Due to the above-mentioned gap and wear problems, existing hinges often have difficulty in providing precise small-angle buffering when realizing the buffering function. This is particularly evident in application scenarios that require precise control of the opening and closing angles. For example, during the slow closing process of a furniture door, excessive gaps and shaking not only affect the aesthetics of the door, but may also have a negative impact on the sealing and service life of the door, so it is necessary to make further improvements. Summary of the invention

[0008] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a hydraulic buffer hinge which has a simple structure, is easy to use and can achieve a more stable and reliable hinge action.

[0009] The object of the present invention is achieved in the following manner: a hydraulic buffer 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, and the upper connecting rod and the lower connecting rod move relative to the hinge cup and the hinge arm to realize the opening and closing of the hinge:

[0010] The hinge arm is provided with a receiving cavity, a guide shell is installed in the receiving cavity, a slideway is provided in the guide shell, and a slider is slidably installed in the slideway;

[0011] It also includes a driving arm disposed at the tail of the lower connecting rod, the driving arm extending into the slideway and contacting the sliding block;

[0012] Also included is a damper disposed in the accommodating chamber, wherein a cylinder portion or a piston rod portion of the damper extends into the slideway and contacts the slider;

[0013] When the hinge is closed, the driving arm contacts the damper through the slider, and transmits the damping force of the damper to the hinge cup, thereby achieving a damping effect when the hinge is closed.

[0014] Furthermore: the slideway is extended in an arc shape, and correspondingly, the slider is arranged in an arc shape matching the shape of the slideway.

[0015] Furthermore: the front end of the slider is provided with a first arc contact surface in contact with the driving arm, and the rear end of the slider is provided with a second arc contact surface in contact with the damper.

[0016] Furthermore: the rear end of the driving arm is provided with a third arc contact surface which contacts the sliding block.

[0017] Furthermore: a damping cavity is arranged in the guide shell, and the damper is installed in the damping cavity.

[0018] Furthermore: a fixed cavity is also provided in the guide shell, the piston rod part of the damper is fixed in the fixed cavity, the cylinder part of the damper is slidably installed in the damping cavity, the damping cavity is connected to the slideway, and the cylinder part of the damper extends into the slideway and contacts the slider.

[0019] Furthermore: the damper is of self-resetting compression damping type.

[0020] Furthermore: the guide shell includes a first shell and a second shell installed relatively to each other, and the slideway is concavely arranged on the opposite surfaces of the first shell and the second shell.

[0021] Furthermore, the guide shell is connected to the hinge arm through a first pin, a second pin and a third pin, so that the guide shell is fixed in the accommodating cavity of the hinge arm.

[0022] The beneficial effects of the present invention are: 1. Simple structure, low production cost and improved market competitiveness.

[0023] 2. By setting a receiving cavity, a guide shell and a slideway in the hinge arm, and slidingly installing a slider in the slideway, the driving arm and the damper are connected through the slider. This design effectively transmits the damping force of the damper, ensuring that the hinge has a smooth and controllable buffering effect during the opening and closing process, avoiding the problem of unstable buffering caused by improper clearance in the prior art.

[0024] 3. The slide adopts an arc-shaped extension setting, and the shape of the slider matches the slide to be an arc, which makes the slider move more accurately and smoothly when moving in the slide. At the same time, the slider plays the role of lengthening the lever and shortening the damping stroke of the damper.

[0025] 4. The slider contacts the damper and the drive arm through the arc contact surface, which increases the contact area, disperses the contact stress, and reduces the risk of local wear. Compared with the traditional coaxial matching method, the new connection structure effectively reduces the wear rate and extends the service life of the hinge.

[0026] 5. The driving arm is connected to the damper through a slider, which effectively transmits the damping force to the hinge cup, ensuring the uniform distribution of the buffering force. This force transmission method avoids the problem of excessive local force and improves the reliability and durability of the hinge under high load conditions.

[0027] 6. The slider can be made of plastic material. When it comes into friction contact with the damper and the driving arm, the self-lubricating property of the plastic can be used to reduce friction and noise when the hinge is opened and closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a diagram showing the hinge in the open state in the present invention.

[0029] Figure 2 This is a cross-sectional view of the structure of the hinge in the open state in the present invention.

[0030] Figure 3 For the present invention Figure 2 A-section structure enlarged view.

[0031] Figure 4 This is a diagram showing the hinge in the closed state in the present invention.

[0032] Figure 5 This is a cross-sectional view of the structure of the hinge in the closed state in the present invention.

[0033] Figure 6 For the present invention Figure 5 Enlarged view of the structure of part B.

[0034] Figure 7 This is one of the structural decomposition diagrams of the present invention.

[0035] Figure 8 This is the second structural decomposition diagram of the present invention. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below with reference to the accompanying drawings. A hydraulic buffer hinge comprises a hinge cup 1 and a hinge arm 2, wherein the hinge cup 1 and the hinge arm 2 are hingedly connected via an upper connecting rod 3 and a lower connecting rod 4, and the upper connecting rod 3 and the lower connecting rod 4 move relative to the hinge cup 1 and the hinge arm 2 to realize the opening and closing of the hinge:

[0037] The hinge arm 2 is provided with a receiving chamber 21, a guide shell 5 is installed in the receiving chamber 21, a slideway 51 is provided in the guide shell 5, and a slider 7 is slidably installed in the slideway 51;

[0038] It also includes a driving arm 41 disposed at the tail of the lower connecting rod 4, and the driving arm 41 extends into the slideway 51 and contacts the slider 7;

[0039] The damper 6 is also provided in the accommodating chamber 21, and the cylinder part 61 or the piston rod part 62 of the damper 6 extends into the slideway 51 and contacts the slider 7;

[0040] When the hinge is closed, the driving arm 41 contacts the damper 6 through the slider 7, and transmits the damping force of the damper 6 to the hinge cup 1, thereby achieving a damping effect when the hinge is closed.

[0041] In one embodiment, the slideway 51 is extended in an arc shape, and correspondingly, the slider 7 is configured in an arc shape matching the shape of the slideway 51 .

[0042] In one embodiment, the front end of the slider 7 is provided with a first arc contact surface 71 in contact with the driving arm 41 , and the rear end of the slider 7 is provided with a second arc contact surface 72 in contact with the damper 6 .

[0043] In one embodiment, a third arc contact surface 42 for contacting the slider 7 is disposed at the rear end of the driving arm 41 .

[0044] In one embodiment, a damping chamber 52 is provided in the guide shell 5 , and the damper 6 is installed in the damping chamber 52 .

[0045] In one of the embodiments, a fixed cavity 53 is further provided in the guide shell 5, the piston rod portion 62 of the damper 6 is fixed in the fixed cavity 53, the cylinder portion 61 of the damper 6 is slidably installed in the damping cavity 52, the damping cavity 52 is communicated with the slide 51, and the cylinder portion 61 of the damper 6 extends into the slide 51 and contacts the slider 7.

[0046] In one embodiment, the damper 6 is of a self-resetting compression damping type.

[0047] In one embodiment, the guide housing 5 includes a first housing 54 and a second housing 55 which are installed opposite to each other, and the slideway 51 is concavely disposed on opposite surfaces of the first housing 54 and the second housing 55 .

[0048] In one embodiment, the guide housing 5 is connected to the hinge arm 2 via a first pin 56 , a second pin 57 and a third pin 58 , so that the guide housing 5 is fixed in the receiving cavity 21 of the hinge arm 2 .

[0049] Working principle: When the hinge is in the process of opening and closing, the hinge cup and the hinge arm are connected to each other through the upper connecting rod and the lower connecting rod, and the hinge cup rotates relative to the hinge arm. The upper connecting rod and the lower connecting rod drive the hinge structure between the hinge arm and the hinge cup to move during the opening and closing process of the hinge, forming a normal hinge opening and closing action.

[0050] The hinge arm has a receiving cavity inside, a guide shell is installed in the receiving cavity, and a slideway is formed in the guide shell. The slideway is designed to be arc-shaped, and the slider is installed in the slideway and can slide in the arc-shaped slideway. The tail of the lower connecting rod is provided with a driving arm, which extends into the slideway and contacts the slider.

[0051] like Figure 1-3 As shown, when the hinge is in the open state, the self-resetting damper is reset under the action of its internal spring, and the piston rod of the damper is pushed outward, causing the cylinder body to push the slider to move to the reset state, so that the slider enters the operating stroke of the drive arm.

[0052] like Figure 4-6As shown in the figure, when the hinge is closed, the driving arm tilts upward, and the driving arm pushes the slider to move along the slide toward the damper, thereby pushing the damper to compress and generate damping force. The damping force is transmitted to the driving arm and the lower connecting rod in the reverse direction through the slider, slowing down the closing speed of the hinge and playing a damping role when the hinge is closed.

[0053] It is important to note that the drive arm drives the slider to slide in the slideway, and the drive arm drives the slider to move relative to the guide shell. This design ensures the smooth movement of the slider along the slideway, so that the force points between the slider and the slideway are constantly changing, avoiding long-term force wear on a certain part. At the same time, the movement of the drive arm can be accurately transmitted, reducing the shaking and jamming problems caused by the connection gap in the traditional hinge structure.

[0054] Compared with traditional technology, the damper in this case is connected to the drive arm and the lower connecting rod through a slider, ensuring that the damping force is accurately transmitted to the hinge cup, achieving precise control of the buffering effect. Compared with the traditional structure connected by the hinge hole and the hinge shaft, this design avoids the problems of shaking and buffering instability caused by the gap, ensuring the smooth closing of the hinge during use. At the same time, the slider plays the role of lengthening the lever and shortening the damping stroke of the damper. The damper only needs to move a smaller stroke to achieve damping of the drive arm, making the internal structure of this structure more streamlined.

[0055] In addition, when the slider moves in the arc-shaped slideway, the contact area between the slider and the slideway is large, making the power distribution even. This design not only reduces wear, but also ensures that the slider slides more smoothly in the guide housing, avoiding the jamming phenomenon caused by concentrated friction in the traditional structure.

[0056] Similarly, the first arc contact surfaces 71 at both ends of the slider are connected to the driving arm 41, and the rear end of the slider 7 is provided with a second arc contact surface 72 connected to the damper 6. The first and second arc contact surfaces can also increase the contact area between the driving arm and the damper, reduce the local pressure, and reduce the wear per unit contact area, thereby ensuring the service life of the hinge.

[0057] In addition, the close cooperation between the guide housing, the slider, the drive arm and the damper not only makes the hinge structure more compact, but also improves its overall stability. The damping cavity and the fixing cavity design in the guide housing provide a reliable installation position for the damper, ensuring that there is no loosening or displacement during use, further enhancing the working stability of the hinge.

[0058] Furthermore, the invention also avoids the shaking phenomenon caused by excessive gap or wear in the traditional coaxial matching structure through the matching of the arc-shaped slideway and the slider. The close matching between the slider and the slideway ensures the stability of the hinge opening and closing action, while reducing local wear and extending the service life of the hinge.

[0059] To sum up, the hydraulic buffer hinge of the present invention achieves smooth buffering of the opening and closing action of the hinge through the unique coordinated design of the slider, slideway, drive arm and damper, greatly improves the common problems of jamming, shaking and wear in existing hinges, and improves the overall performance and service life of the hinge.

[0060] 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 hydraulic buffer hinge, comprising a hinge cup (1) and a hinge arm (2), wherein the hinge cup (1) and the hinge arm (2) are hingedly connected via an upper connecting rod (3) and a lower connecting rod (4), and the upper connecting rod (3) and the lower connecting rod (4) move relative to the hinge cup (1) and the hinge arm (2) to realize the opening and closing of the hinge: Features: The hinge arm (2) is provided with a receiving chamber (21), a guide shell (5) is installed in the receiving chamber (21), a slideway (51) is provided in the guide shell (5), and a slider (7) is slidably installed in the slideway (51); It also includes a driving arm (41) disposed at the rear of the lower connecting rod (4), the driving arm (41) extending into the slideway (51) and contacting the sliding block (7); It also includes a damper (6) disposed in the accommodating chamber (21), wherein a cylinder portion (61) or a piston rod portion (62) of the damper (6) extends into the slideway (51) and contacts the slider (7); When the hinge is closed, the driving arm (41) contacts the damper (6) via the slider (7), transmitting the damping force of the damper (6) to the hinge cup (1), thereby achieving a damping effect when the hinge is closed; The slideway (51) is extended in an arc shape, and correspondingly, the slider (7) is arranged in an arc shape matching the shape of the slideway (51); The front end of the slider (7) is provided with a first arc contact surface (71) in contact with the driving arm (41), and the rear end of the slider (7) is provided with a second arc contact surface (72) in contact with the damper (6); The rear end of the driving arm (41) is provided with a third arc contact surface (42) that contacts the slider (7).

2. A hydraulic buffer hinge according to claim 1, characterized in that: A damping chamber (52) is provided in the guide shell (5), and the damper (6) is installed in the damping chamber (52).

3. A hydraulic buffer hinge according to claim 2, characterized in that: A fixed cavity (53) is further provided in the guide housing (5), a piston rod portion (62) of the damper (6) is fixed in the fixed cavity (53), a cylinder portion (61) of the damper (6) is slidably mounted in the damping cavity (52), the damping cavity (52) is connected to the slideway (51), and the cylinder portion (61) of the damper (6) extends into the slideway (51) and contacts the slider (7).

4. A hydraulic buffer hinge according to any one of claims 1 to 3, characterized in that: The damper (6) is of a self-resetting compression damping type.

5. A hydraulic buffer hinge according to claim 1 or 3, characterized in that: The guide shell (5) comprises a first shell (54) and a second shell (55) which are relatively mounted, and the slideway (51) is concavely arranged on the opposite surfaces of the first shell (54) and the second shell (55).

6. The hydraulic buffer hinge according to claim 1, characterized in that: The guide shell (5) is connected to the hinge arm (2) via a first pin (56), a second pin (57) and a third pin (58), so that the guide shell (5) is fixed in the accommodating cavity (21) of the hinge arm (2).

Images