Embedded buffer hinge

Abstract

The present invention provides an embedded buffer hinge, comprising a fixed seat, a base and a transmission component, the transmission component comprising a six-link assembly, a closing buffer device being provided between the six-link assembly and the fixed seat, the closing buffer device comprising a buffer damper and a damping link, the fixed seat being provided with a damping mounting seat for connecting to the cylinder shaft of the buffer damper, the top rod of the buffer damper being connected to the swing end of the damping link, the fixed end of the damping link being installed at the transmission hinge point of the six-link assembly via a fixed shaft, the fixed shaft being provided with a torsion spring, the two elastic ends of the torsion spring being respectively connected to the six-link assembly and the damping link; an automatic closing power component being provided between the six-link assembly and the base, the two ends of the automatic closing power component being respectively connected to the six-link assembly and the hinge point of the six-link assembly and the base. The structure is optimized, the stability is high, the installation is convenient, and the automatic door closing function and the buffering effect are both provided, the use is convenient, and the quality of use is guaranteed.

Description

Technical Field

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

[0002] Embedded hinges are mostly used in electrical appliances, such as refrigerators, ovens, etc., to allow the door to rotate and open and close on the cabinet body, which is easy to operate and saves space.

[0003] Existing Chinese patent number: ZL201410188238.1, a built-in refrigerator door hinge and built-in refrigerator, discloses a fixed hinge base, a movable hinge base, a long swing arm, a first short swing arm, a second short swing arm, and a third short swing arm. The long swing arm is hinged at one end to the fixed hinge base; the first and second short swing arms are each hinged at one end to the long swing arm and at the other end to the movable hinge base; the third short swing arm is hinged at one end to the fixed hinge base and at the other end to the second short swing arm. Thus, the fixed hinge base, movable hinge base, long swing arm, and three short swing arms form a six-link mechanism, enabling the built-in refrigerator door to open and close.

[0004] However, the above hinge structure has the following deficiencies in practical applications:

[0005] 1) Although the above-mentioned hinge structure is equipped with a door opening and closing assist mechanism, which has a certain degree of door opening and closing assist, making the door opening and closing effortless, the six-link mechanism is prone to generate rotational torque during rotation. Under the influence of radial stress, the six-link mechanism is prone to uneven force, resulting in door closing jerking, or even failure to assist in opening and closing the door. Especially when used on doors with large loads, manual assistance is still required to close the door, the transmission performance is poor, and the quality of use still needs to be improved.

[0006] 2) The above hinge structure has no buffering function, which makes it easy to generate noise when closing, resulting in a poor user experience and even easily damaging other transmission components, reducing the service life.

[0007] 3) The hovering opening angle of the above hinge structure cannot reach the maximum design angle, and its use is greatly limited.

[0008] 4) The hardware base installed on the door and cabinet body is prone to shaking up and down after being subjected to force during use. Especially when the door body is loaded with a large load, the shaking is more obvious, the stability is poor, and the quality of product use is affected. Summary of the Invention

[0009] The purpose of the invention is to overcome the shortcomings of the existing technology and provide an embedded buffer hinge with optimized structure, high stability, easy installation, automatic door closing function and buffering effect, easy to use, better experience and guaranteed quality of use.

[0010] The object of the present invention is achieved as follows: an embedded buffer hinge, comprising a fixed seat, a base and a transmission component for relative opening and closing of the base and the fixed seat, the transmission component comprising a six-link assembly hinged between the base and the fixed seat, a closing buffer device is provided between the six-link assembly and the fixed seat, the closing buffer device comprises a buffer damper and a damping link, the fixed seat is provided with a damping mounting seat for connecting to the cylinder shaft of the buffer damper, the top rod of the buffer damper is connected to the swinging end of the damping link, the fixed end of the damping link is installed at the transmission hinge point of the six-link assembly through a fixed shaft, the fixed shaft is installed with a torsion spring for keeping the top rod of the buffer damper in an upward pulling state at all times, and the two elastic ends of the torsion spring are respectively connected to the six-link assembly and the damping link.

[0011] According to the above optimization, an automatic closing power component is provided between the six-link assembly and the base, which elastically acts on the base during closing to generate a closing rotation force arm. One end of the automatic closing power component is connected to the six-link assembly, and the other end of the automatic closing power component is connected to the hinge point between the six-link assembly and the base.

[0012] According to the above optimization, the six-link assembly includes a transmission arm, a connecting arm, a connecting rod, and a rocker arm. The swing ends of the connecting arm and the connecting rod are hinged on the base front and back, and the connecting ends of the connecting arm and the connecting rod are hinged on the swing end of the transmission arm front and back. The positioning end of the transmission arm is hinged on the fixed seat. The buffer damper is placed in the transmission arm, and the cylinder shaft of the buffer damper is connected to the hinge point of the transmission arm and the fixed seat. The transmission arm is equipped with a fixed shaft connected to the damping link shaft. The torsion spring is sleeved on the fixed shaft and its two elastic ends are respectively connected to the inner side wall of the transmission arm and the damping link.

[0013] The hinge point between the transmission arm and the connecting arm is connected to the positioning end of the automatic closing power component, and the hinge point between the base and the connecting arm is connected to the swing end of the automatic closing power component.

[0014] According to the above optimization, the transmission arm and the rocker arm swing downward around the hinge point with the fixed seat respectively, and at the same time drive the connecting arm and the connecting rod to swing downward around the hinge point with the transmission arm respectively and drive the base to fold toward the fixed seat, thereby forming a damping starting angle for triggering the buffer damper between the base and the fixed seat.

[0015] According to the above optimization, the damping start angle is set to 40°-0°.

[0016] According to the above optimization, the automatic closing power component includes a cam, a roller, a swing rod, and an elastic transmission rod group. The cam is fixedly mounted on the base, the positioning end shaft of the elastic transmission rod group is connected to the hinge point between the transmission arm and the connecting arm, the positioning end shaft of the swing rod is connected to the connecting arm, the swing end of the swing rod is connected to the swing end of the elastic transmission rod group, the roller shaft is connected to the swing end of the elastic transmission rod group, and the roller that swings with the connecting arm is always rolling and connected to the cam under the elastic action of the elastic transmission rod.

[0017] According to the above optimization, the cam is provided with an arc outer edge that makes the hinge point of the base and the connecting arm, the tangent point of the cam and the roller, and the center of the roller be in a collinear position but not in the arc outer edge for generating the switch force arm. The end of the arc outer edge is connected to the arc convex edge that makes the elastic force of the elastic transmission rod group pass through the center of the roller, the tangent point of the roller and the cam and act on the cam to generate the closing rotation force arm. The roller rolls back and forth on the arc outer edge and the arc convex edge as the connecting arm swings up and down.

[0018] According to the above optimization, the cam is provided with a mounting hole fixed at the hinge point between the base and the connecting arm, and the mounting hole is concentric with the outer edge of the arc.

[0019] According to the above optimization, the fixing seat is provided with a hinged end hinged to the six-link assembly, and the hinged end is provided with a reinforced inverted hook for preventing up and down movement after being subjected to force, and the fixing seat is provided with a buckling groove for buckling with the reinforced inverted hook.

[0020] According to the above optimization, the base is provided with an upper mounting seat with a mounting hole, the upper mounting seat is spliced ​​on one side of the base, and the upper mounting seat is provided with a connecting block fixed on the upper surface of the base.

[0021] The advantages of the present invention are:

[0022] 1) The structural coordination between the closing buffer device and the six-link assembly can achieve a closing buffer effect during the closing period of the hinge, and the structure is simple. At the same time, under the structural characteristics of the closing buffer device of this structure, the rotational torsional force generated when the six-link assembly swings is avoided, which causes uneven force on the closing buffer device, thereby improving the buffering effect of the closing buffer device.

[0023] 2) Under the action of the automatic closing power component, the hinge can generate a closing rotation force arm when it is closed to a certain angle, so that the hinge has an automatic closing function, high structural transmission stability, and is easy to use.

[0024] 3) The structure of the reinforced inverted hook is used to effectively prevent the two sides of the fixing seat from shaking up and down after being stressed, thereby improving the stability of the structure.

[0025] 4) By adding an upper mounting seat, the base and door body are easily assembled, holes are avoided on the base, the compressive strength is enhanced, the assembly stability is ensured, and the quality of the product is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of a preferred embodiment of the present invention in a closed state.

[0027] Figure 2 It is a cross-sectional view of a preferred embodiment of the present invention in a closed state.

[0028] Figure 3 This is a structural diagram of the preferred embodiment of the present invention with the closed buffer device involved.

[0029] Figure 4 This is a cross-sectional view of the closed buffer device according to a preferred embodiment of the present invention.

[0030] Figure 5 This is a structural diagram of a preferred embodiment of the present invention in the automatic closing start position.

[0031] Figure 6 It is a cross-sectional view of a preferred embodiment of the present invention at the automatic closing start position.

[0032] Figure 7 This is a structural diagram of a preferred embodiment of the present invention opened at a 90-degree angle.

[0033] Figure 8 This is a cross-sectional view of a preferred embodiment of the present invention opened at a 90-degree angle.

[0034] Figure 9 This is a structural diagram of a preferred embodiment of the present invention opened at the maximum angle.

[0035] Figure 10 A cross-sectional view of a preferred embodiment of the present invention opened at the maximum angle.

[0036] Figure 11 This is a schematic structural diagram of a cam in a preferred embodiment of the present invention.

[0037] Figure 12 This is a schematic structural diagram of a fixing base according to a preferred embodiment of the present invention.

[0038] Figure 13 It is a left side view of the fixing base of the preferred embodiment of the present invention. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings.

[0040] According to the attached Figures 1 to 13As shown, an embedded buffer hinge includes a fixed seat 1, a base 2 and a transmission component for the base 2 and the fixed seat 1 to open and close relative to each other. The transmission component includes a six-link assembly 3 hinged between the base 2 and the fixed seat 1, and a closing buffer device is provided between the six-link assembly 3 and the fixed seat 1. The closing buffer device includes a buffer damper 4 and a damping link 5. The fixed seat 1 is provided with a damping mounting seat 6 for connecting to the cylinder shaft of the buffer damper 4. The top rod of the buffer damper 4 is connected to the swing end of the damping link 5, and the fixed end of the damping link 5 is installed at the transmission hinge point of the six-link assembly 3 through a fixed shaft. In addition, the fixed shaft is equipped with a torsion spring 7 for the top rod of the buffer damper 4 to always maintain an upward pulling state. The two elastic ends of the torsion spring 7 are respectively connected to the six-link assembly 3 and the damping link 5.

[0041] Reference Figures 1 to 13 As shown, in further detail, the six-link assembly 3 includes a transmission arm 31, a connecting arm 32, a connecting rod 33, and a rocker arm 34. The swing ends of the connecting arm 32 and the connecting rod 33 are hinged to the base 2 in front and back, and the connecting ends of the connecting arm 32 and the connecting rod 33 are hinged to the swing end of the transmission arm 31 in front and back. The positioning end of the transmission arm 31 is hinged to the fixed seat 1. The buffer damper 4 is placed in the transmission arm 31, and the cylinder shaft of the buffer damper 4 is connected to the hinge point between the transmission arm 31 and the fixed seat 1. The transmission arm 31 is equipped with a fixed shaft connected to the damping link 5. The torsion spring 7 is sleeved on the fixed shaft and its two elastic ends are respectively connected to the inner side wall of the transmission arm 31 and the damping link 5.

[0042] In actual use, the transmission arm 31 and the swing arm 34 swing downward about their respective hinge points with the fixed base 1, simultaneously driving the connecting arm 32 and the connecting rod 33 to swing downward about their respective hinge points with the transmission arm 31 and driving the base 2 to fold toward the fixed base 1. Consequently, a damping activation angle is formed between the base 2 and the fixed base 1 for actuating the buffer damper 4. The damping activation angle is set to 40°-0°, and can be set to 40°, 35°, 30°, etc. according to actual application.

[0043] That is, when the hinge is closed, the base 2 swings toward the fixed base 1 to drive the six-link assembly 3 to fold, causing the transmission arm 31 and the rocker arm 34 to swing downward around the hinge point with the fixed base 1. The damping start angle shown in this figure is 35°. When the base 2 swings to the damping start angle of 40°, the connecting rod 33, under the action of external force, drives the damping link 5 to overcome the elastic force of the torsion spring 7 and swing toward the buffer damper 4, thereby pushing the top pressure of the buffer damper 4 inward, triggering the buffer damper 4, achieving a buffering effect, and protecting the hinge. During this period, because the torsion spring 7 always provides an upward lifting force to the top rod of the buffer damper 4, the rotational torsional force generated when the six-link assembly 3 swings is avoided, which causes uneven force on the closing buffer device, thereby improving the buffering effect of the closing buffer device.

[0044] Reference Figures 1 to 13 As shown, an automatic closing power component 8 is provided between the six-link assembly 3 and the base 2, which elastically acts on the base 2 during closing to generate a closing rotation force arm. One end of the automatic closing power component 8 is connected to the six-link assembly 3, and the other end of the automatic closing power component 8 is connected to the hinge point between the six-link assembly 3 and the base 2.

[0045] In actual operation, the hinge point between the transmission arm 31 and the connecting arm 32 is connected to the positioning end of the automatic closing power component 8, and the hinge point between the base 2 and the connecting arm 32 is connected to the swing end of the automatic closing power component 8.

[0046] The automatic closing power unit 8 includes a cam 81, a roller 82, a swinging lever 83, and an elastic transmission lever assembly 84. The cam 81 is fixedly mounted on the base 2. The positioning end of the elastic transmission lever assembly 84 is axially connected to the hinge point between the transmission arm 31 and the connecting arm 32. The positioning end of the swinging lever 83 is axially connected to the connecting arm 32, and the swinging end of the swinging lever 83 is connected to the swinging end of the elastic transmission lever assembly 84. The roller 82 is axially connected to the swinging end of the elastic transmission lever assembly 84. As the connecting arm 32 swings, the roller 82 is constantly rolling on the cam 81 under the elastic action of the elastic transmission lever.

[0047] Furthermore, the cam 81 is provided with an arc outer edge 811 that places the hinge point between the base 2 and the connecting arm 32, the tangent point between the cam 81 and the roller 82, and the center of the roller 82 in a collinear position, thereby generating an opening and closing force arm. The end of the arc outer edge 811 is connected to an arc convex edge 812 that allows the elastic force of the elastic transmission rod assembly 84 to pass through the center of the roller 82 and the tangent point between the roller 82 and the cam 81, and act on the cam 81 to generate a closing rotation force arm. The roller 82 rolls back and forth on the arc outer edge 811 and the arc convex edge 812 as the connecting arm 32 swings up and down.

[0048] Thus, when the hinge is opened to a specific angle (selectable as 30°, 35°, or 40°, with the figure for this structure showing an angle of 35° or higher), the roller 82 rolls on the arc outer edge 811 of the cam 81. At this point, the hinge point between the base 2 and the connecting arm 32, the tangent point between the cam 81 and the roller 82, and the center of the roller 82 are collinear, generating neither an opening lever nor a closing lever, thereby achieving the hinge's open hovering function. The figure for this structure also shows the hinge at 90° and the maximum open hovering angle.

[0049] In addition, the cam 81 is provided with a mounting hole 813 fixed at the hinge point between the base 2 and the connecting arm 32. The mounting hole 813 and the outer edge of the arc 811 are concentric circles. Combined with the structure of the six-link assembly 3, the maximum opening and hovering angle can be designed to reach 125°, realizing optimized wide-angle opening of the hinge and easy use.

[0050] When the hinge is closed to a specified angle or less, such as 30°, 35°, or 40° (the specified closing angle in this structure is 35°), roller 82 rolls onto the arc-shaped convex edge 812 of cam 81. At this point, the elastic force of the spring transmission rod assembly passes through the center of roller 82 and the tangent point between roller 82 and cam 81, and elastically acts on cam 81, causing the six-link assembly 3 to generate a closing rotational force arm, thereby driving the base 2 to automatically close on the fixed base 1, achieving automatic hinge closure and facilitating operation.

[0051] Reference Figures 1 to 13 As shown, the fixing seat 1 is provided with a hinged end 10 hinged to the six-link assembly 3, and the hinged end 10 is provided with a reinforced inverted hook 9 for preventing up and down movement after being subjected to force, and the fixing seat 1 is provided with a buckling groove 11 for buckling with the reinforced inverted hook 9.

[0052] The structure of the reinforced inverted hook 9 at the hinged end 10 cooperates with the buckle groove 11 to effectively prevent the two sides of the fixing base 1 from shaking up and down after being subjected to force, thereby improving the structural stability.

[0053] Furthermore, the base 2 is provided with an upper mounting seat 12 with a mounting hole 813 . The upper mounting seat 12 is spliced ​​on one side of the base 2 , and the upper mounting seat 12 is provided with a connecting block 13 fixed on the upper surface of the base 2 .

[0054] By adding the upper mounting seat 12, the assembly of the base 2 and the door body is facilitated, and holes in the base 2 are avoided, which facilitates production and manufacturing, enhances the compressive strength, ensures assembly stability, and ensures the quality of product use.

[0055] The above specific embodiments are only specific implementation methods with better effects of the present invention. Any structure that is the same or equivalent to the embedded buffer hinge of the present invention is within the protection scope of the present invention.

Claims

1. An embedded buffer hinge, comprising a fixed seat (1), a base (2) and a transmission component for the base (2) and the fixed seat (1) to open and close relative to each other, characterized in that: The transmission component comprises a six-link assembly (3) hinged between a base (2) and a fixed seat (1); a closed buffer device is provided between the six-link assembly (3) and the fixed seat (1); the closed buffer device comprises a buffer damper (4) and a damping link (5); the fixed seat (1) is provided with a damping mounting seat (6) for connecting with the cylinder shaft of the buffer damper (4); the top rod of the buffer damper (4) is connected with the swing end of the damping link (5); the fixed end of the damping link (5) is mounted on the transmission hinge point of the six-link assembly (3) through a fixed shaft; the fixed shaft is provided with a torsion spring (7) for keeping the top rod of the buffer damper (4) in an upward pulling state; the two elastic ends of the torsion spring (7) are respectively connected to the six-link assembly (3) and the damping link (5); An automatic closing power component (8) is provided between the six-link assembly (3) and the base (2) for elastically acting on the base (2) during closing to generate a closing rotation force arm, one end of the automatic closing power component (8) is connected to the six-link assembly (3), and the other end of the automatic closing power component (8) is connected to a hinge point between the six-link assembly (3) and the base (2); The six-link assembly (3) includes a transmission arm (31), a connecting arm (32), a connecting rod (33), and a rocker rod (34). The swing ends of the connecting arm (32) and the connecting rod (33) are hinged to the base (2) front and back. The connecting ends of the connecting arm (32) and the connecting rod (33) are hinged to the swing end of the transmission arm (31) front and back. The positioning end of the transmission arm (31) is hinged to the fixed seat (1). The buffer damper (4) is placed in the transmission arm (31), and the cylinder shaft of the buffer damper (4) is connected to the hinge point between the transmission arm (31) and the fixed seat (1). The transmission arm (31) is equipped with a fixed shaft connected to the damping link (5) shaft. The torsion spring (7) is sleeved on the fixed shaft and its two elastic ends are respectively connected to the inner side wall of the transmission arm (31) and the damping link (5). The hinge point between the transmission arm (31) and the connecting arm (32) is connected to the positioning end of the automatic closing power component (8), and the hinge point between the base (2) and the connecting arm (32) is connected to the swing end of the automatic closing power component (8); The transmission arm (31) and the swing rod (34) swing downward around the hinge point with the fixed seat (1), and at the same time drive the connecting arm (32) and the connecting rod (33) to swing downward around the hinge point with the transmission arm (31) and drive the base (2) to fold toward the fixed seat (1), thereby forming a damping starting angle for triggering the buffer damper (4) between the base (2) and the fixed seat (1); The fixing seat (1) is provided with an articulated end portion (10) articulated to the six-link assembly (3), the articulated end portion (10) is provided with a reinforced undercut hook (9) for preventing up and down movement after being subjected to force, and the fixing seat (1) is provided with a fastening groove (11) for fastening with the reinforced undercut hook (9).

2. The embedded buffer hinge according to claim 1, characterized in that: The damping start angle is set to 40°-0°.

3. The embedded buffer hinge according to claim 1, characterized in that: The automatic closing power component (8) includes a cam (81), a roller (82), a swing rod (83), and an elastic transmission rod group (84). The cam (81) is fixedly mounted on the base (2). The positioning end shaft of the elastic transmission rod group (84) is connected to the hinge point between the transmission arm (31) and the connecting arm (32). The positioning end shaft of the swing rod (83) is connected to the connecting arm (32). The swing end of the swing rod (83) is connected to the swing end of the elastic transmission rod group (84). The roller (82) is connected to the swing end of the elastic transmission rod group (84). The roller (82) is always rolled and connected to the cam (81) under the elastic action of the elastic transmission rod as the connecting arm (32) swings.

4. The embedded buffer hinge according to claim 3, characterized in that: The cam (81) is provided with an arc outer edge (811) for generating a switch force arm, so that the hinge point of the base (2) and the connecting arm (32), the tangent point of the cam (81) and the roller (82), and the center of the roller (82) are in a three-point collinear position and are not in the arc outer edge (811). The end of the arc outer edge (811) is connected to the arc convex edge (812) for generating a closing rotation force arm by allowing the elastic force of the elastic transmission rod group (84) to pass through the center of the roller (82), the tangent point of the roller (82) and the cam (81) and act on the cam (81). The roller (82) rolls back and forth on the arc outer edge (811) and the arc convex edge (812) as the connecting arm (32) swings up and down.

5. The embedded buffer hinge according to claim 4, characterized in that: The cam (81) is provided with a mounting hole (813) fixed at a hinge point between the base (2) and the connecting arm (32), and the mounting hole (813) and the outer edge of the arc (811) are concentric circles.

6. The embedded buffer hinge according to claim 1, characterized in that: The base (2) is provided with an upper mounting seat (12) with a mounting hole (813), the upper mounting seat (12) is spliced ​​on one side of the base (2), and the upper mounting seat (12) is provided with a connecting block (13) fixed on the upper surface of the base (2).

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