Hinge

Abstract

The utility model provides a hinge capable of enabling a door to be opened and closed more smoothly, which comprises a shell, a rotating shaft, a first buffer, a first piston and a ball, a cam is arranged on the rotating shaft, the cam is provided with an abutting face, the first piston is arranged in the shell and can rotate in the circumferential direction relative to the shell, and the ball is arranged in the shell. The first piston tends to be close to the abutting face through the first buffer, a containing groove is formed in the end of the first piston, the ball is arranged in the containing groove, the area of the circumferential section of the containing groove is larger than the diameter of the ball, and the ball can freely move on the circumferential section of the containing groove. When the rotating shaft rotates to the first positioning holding position, the ball abuts against the abutting face, and when the rotating shaft rotates to the first positioning holding position, the abutting face extrudes the ball so that the ball can be gradually away from the axis of the rotating shaft.

Description

Technical Field

[0001] This utility model relates to a hinge, and more particularly to a hinge that makes opening and closing doors smoother. Background Technology

[0002] A hinge is a device used to buffer the opening and closing of various doors. CN218150384U discloses a single-opening hydraulic buffer glass door hinge, which includes a fixed base 1, a movable base 2, and a limit shaft mounting base 3. The fixed base 1 is fixedly connected to the limit shaft mounting base 3. The movable base 2 is rotatably hinged to the limit shaft mounting base 3 via a limit shaft 4. A limit cam 41 is provided in the middle section of the limit shaft 4. A damper 5 is provided in the movable base 2 corresponding to the limit cam 41. The protruding end of the damper 5 contacts the fixed base 1. A protrusion 51 is provided at the end of the cylinder of the damper 5 corresponding to the limit cam 41. A first spring 6 and a second spring 7 are respectively provided on both sides of the damper 5 to provide a return force for the limit shaft 4. The elastic force of the first spring 6 is greater than that of the second spring 7.

[0003] The patent has the following defects: 1. It requires a limiting structure to keep the damper cylinder 5 moving only axially and not rotating circumferentially. Otherwise, the angle of the convex strip 51 will deflect, and the deflected convex strip 51 will not be able to stably hold against the limiting cam 41, resulting in the door not opening and closing smoothly. However, since the door is frequently opened and closed, the damper cylinder 5 will frequently move axially, which will cause the limiting structure to deform and make it impossible to ensure that the damper cylinder 5 moves only axially and cannot rotate circumferentially. Over time, the damper cylinder 5 will still rotate circumferentially, which means that over time, the convex strip 51 will not be able to stably hold against the limiting cam 41; 2. When closing the door, when the tip of the limiting cam 41 presses against the convex strip 51, the convex strip 51 will align with the tip, and the door will easily shake after closing. Utility Model Content

[0004] Therefore, it is necessary to provide a hinge that allows for smoother door opening and closing.

[0005] This utility model provides a hinge, the hinge comprising:

[0006] case;

[0007] A rotating shaft, on which a cam is provided, the cam having a supporting surface;

[0008] First buffer;

[0009] A first piston is disposed in the housing and can rotate circumferentially relative to the housing. The first piston is brought closer to the abutment surface by the first buffer. The end of the first piston is provided with a receiving groove.

[0010] A sphere is disposed in the receiving groove, the circumferential cross-sectional area of ​​the receiving groove is larger than the diameter of the sphere, the sphere can move freely on the circumferential cross-section of the receiving groove, the sphere abuts against the abutting surface, and during the process of the rotating shaft rotating to the first positioning and holding position, the abutting surface squeezes the sphere, causing the sphere to gradually move away from the axis of the rotating shaft.

[0011] Furthermore, the abutting surface includes a first abutting surface and a second abutting surface, with a protrusion formed between the first abutting surface and the second abutting surface;

[0012] When the rotating shaft is in the first positioning and holding position, the receiving groove is divided into a first space and a second space by the axis of the rotating shaft and the vertical surface of the protrusion. The center of the sphere can be located in the first space and the sphere abuts against the first abutting surface, or the center of the sphere can be located in the second space and the sphere abuts against the second abutting surface.

[0013] Furthermore, the rotating shaft can be in a second positioning and holding position. When the rotating shaft rotates from the first positioning and holding position to the second positioning and holding position, the first abutting surface will press the ball to move the ball from the first abutting surface to the second abutting surface, or the second abutting surface will press the ball to move the ball from the second abutting surface to the first abutting surface.

[0014] Furthermore, the first positioning holding position is the closed position, and the second positioning holding position is the open position.

[0015] Furthermore, the rotating shaft is provided with a positioning surface, and the housing is provided with a second piston and a second buffer. When the second piston abuts against the positioning surface by relying on the second buffer, the rotating shaft is positioned and held in the first positioning holding position.

[0016] Furthermore, the positioning surface and the protrusion are disposed on both sides of the axis of the rotating shaft.

[0017] Furthermore, the receiving groove is a regular groove that is rotationally symmetrical about the center of the axis of the first piston.

[0018] Furthermore, the receiving groove is a circular groove or a polygonal groove.

[0019] Furthermore, the first piston is provided with a liquid flow hole that extends to the receiving groove, and a gasket is provided in the receiving groove, the gasket having a through hole that communicates with the liquid flow hole.

[0020] This invention has the following advantages: If the first piston rotates circumferentially, the ball can move freely in the receiving groove. During the rotation of the shaft, the ball always maintains point contact with the abutting surface. During the rotation of the shaft to the first positioning and holding position, the abutting surface squeezes the ball, causing the ball to gradually move away from the axis of the shaft. When the shaft is about to reach the first positioning and holding position, the ball will, to a certain extent, restrict the shaft from continuing to rotate, making it less likely for the shaft to shake when it is in the first positioning and holding position. This invention does not require a limiting structure to restrict the first piston to move only axially and not circumferentially. Even if the first piston rotates circumferentially, it will not affect the smoothness of opening and closing the door. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0022] Figure 2 for Figure 1 A schematic diagram of the internal structure.

[0023] Figure 3 This is a schematic diagram of the side structure of the first piston.

[0024] Figure 4 This is a diagram showing the changes in the state of the rotating shaft. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. It is understood that the accompanying drawings are provided for reference and illustration only and are not intended to limit the present utility model. The connection relationships shown in the drawings are only for clear description and do not limit the connection method.

[0026] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component, or there may be an intervening component. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be noted that, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; or as a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0027] It should also be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Please see Figures 1-4 As shown in the figure, a specific embodiment of the present invention provides a hinge, which includes a housing 10, a rotating shaft 20, a first buffer 30, a first piston 40, a ball 50, and a retaining mechanism 60.

[0029] The housing 10 has a transverse receiving cavity in which the first piston 40 is slidably disposed. The first piston 40 can also rotate circumferentially relative to the housing 10 about its axis B. The first buffer 30 can be a spring or hydraulic oil, and is mainly used to provide a buffering force for the first piston 40.

[0030] The end of the first piston 40 is provided with a receiving groove 41, and the ball 50 is disposed in the receiving groove 41. See details below. Figure 3 As shown, the circumferential cross-sectional area of ​​the receiving groove 41 is larger than the diameter of the sphere 50, and the sphere 50 can move freely on the circumferential cross-section of the receiving groove 41.

[0031] In this embodiment, the receiving groove 41 is a regular groove that is rotationally symmetrical about the axis B of the first piston 40. More specifically, it can be a circular groove or a polygonal groove (e.g., a hexagonal groove or an octagonal groove).

[0032] The rotating shaft 20 is rotatably connected to the housing 10. The axis C of the rotating shaft 20 is perpendicular to the receiving cavity. The axis B of the first piston 40 is on the same vertical plane as the axis C of the rotating shaft 20. The rotating shaft 20 is provided with a cam 21, which has a supporting surface 211. When the rotating shaft 20 rotates, the first piston 40 moves axially relative to the housing 10 by means of the cam 21. The first piston 40 tends to move towards the supporting surface 211 by means of the first buffer 30, so that the ball 50 abuts against the supporting surface 211.

[0033] The rotating shaft 20 can be in the first positioning and holding position (the state of the rotating shaft 20 is as follows) Figure 4 (as shown in (2)) or the second positioning holding position (rotating shaft 20 state compared to) Figure 4 (2) Rotate 90° clockwise or counterclockwise, and can switch between the first positioning holding position and the second positioning holding position. The rotating shaft 20 can be positioned in the first positioning holding position or in the second positioning holding position by relying on the holding mechanism 60.

[0034] The first positioning holding position can be the closed position, and the second positioning holding position can be the open position.

[0035] like Figure 4 As shown in process (1) to (2), during the rotation of the rotating shaft 20 to the first positioning and holding position, the abutment surface 211 presses against the ball 50, causing the ball 50 to gradually move away from the axis C of the rotating shaft 20. Figure 4 As shown in process (2) to (1), during the process of rotating the shaft 20 to the second positioning and holding position, the ball 50 presses the abutment surface 211 so that the ball 50 gradually approaches the axis C of the shaft 20.

[0036] If the first piston 40 rotates circumferentially, the ball 50 can move freely in the receiving groove 41. During the rotation of the rotating shaft 20, the ball 50 always maintains point contact with the abutment surface 211. During the rotation of the rotating shaft 20 to the first positioning and holding position, the abutment surface 211 squeezes the ball 50, causing the ball 50 to gradually move away from the axis C of the rotating shaft 20. When the rotating shaft 20 is about to reach the first positioning and holding position, the ball 50 will, to a certain extent, restrict the rotating shaft 20 from continuing to rotate. The ball 50 and the holding mechanism 60 can jointly position the rotating shaft, making it less likely for the rotating shaft 20 to shake when it is in the first positioning and holding position. This utility model does not require setting a limiting structure to restrict the first piston 40 to only move axially and not rotate circumferentially. Even if the first piston 40 rotates circumferentially, it will not affect the smoothness of opening and closing the door.

[0037] In this specific embodiment, the abutting surface 211 includes a first abutting surface 211a and a second abutting surface 211b, and a protrusion 211c is formed between the first abutting surface 211a and the second abutting surface 211b, and the protrusion 211c is vertical.

[0038] When the rotating shaft 20 is held in the first positioning position, the axis C passing through the rotating shaft 20 and the vertical surface of the protrusion 211c are substantially coincident with the axis B of the first piston 40.

[0039] The rotating shaft 20 may include two second positioning and holding positions. When the rotating shaft 20 is in the two second positioning and holding positions, the rotating shaft 20 rotates by an angle of 180 degrees.

[0040] Even when the first piston 40 rotates, and the rotating shaft 20 is in the first positioning and holding position, the receiving groove 41 is always divided into a first space 411 and a second space 412 by the axis C of the rotating shaft 20 and the vertical surface of the protrusion 211c. The center O of the sphere 50 can be located in the first space 411 and the sphere 50 abuts against the first abutting surface 211a. Alternatively, the center O of the sphere 50 can be located in the second space 412 and the sphere 50 abuts against the second abutting surface 211b.

[0041] like Figure 4 As shown in process (1) to (2), when the rotating shaft 20 rotates counterclockwise to the first positioning and holding position, the first abutting surface 211a will gradually squeeze the sphere 50, and the center O of the sphere 50 is located in the first space 411.

[0042] like Figure 4As shown in process (2) to (3), when the rotating shaft 20 rotates counterclockwise from the first positioning and holding position to the second positioning and holding position, the first abutting surface 211a will squeeze the ball 50, causing the ball 50 to move from the first abutting surface 211a to the second abutting surface 211b. The ball 50 will then move towards the second space 412 and eventually remain in the second space 412.

[0043] Conversely, such as Figure 4 As shown in process (3) to (2), when the rotating shaft 20 rotates clockwise to the first positioning and holding position, the second abutment surface 211b will gradually squeeze the ball 50, and the center O of the ball 50 will be located in the second space 412. When the rotating shaft 20 rotates from the first positioning and holding position to another second positioning and holding position, the second abutment surface 211b will squeeze the ball 50, causing the ball 50 to move from the second abutment surface 211b to the first abutment surface 211a, and the ball 50 will move towards the first space 412 and eventually remain in the first space 411.

[0044] The holding mechanism 60 may include a first positioning surface 61, a second piston 62, and a second buffer 63. The first positioning surface 61 is disposed on the rotating shaft 20. The housing 10 is provided with the second piston 62 and the second buffer 63. The second piston 62 abuts against the first positioning surface 61 by relying on the second buffer 63. At this time, the rotating shaft 20 is positioned and held in the first positioning holding position.

[0045] The second buffer 63 can be selected from either a spring or hydraulic oil, and is mainly used to provide buffering force to the second piston 62.

[0046] The first positioning surface 61 and the protrusion 211c are disposed on both sides of the axis C of the rotating shaft 20, and the first piston 40 and the second piston 62 are respectively disposed on both sides of the axis C of the rotating shaft 20.

[0047] The retaining mechanism 60 may include a second positioning surface 64 disposed on the rotating shaft 20. When the rotating shaft 20 rotates and the second piston 62 abuts against the second positioning surface 64, the rotating shaft 20 is positioned and held in the second positioning holding position. The retaining mechanism 60 includes two second positioning surfaces 64, which are disposed opposite to each other.

[0048] like Figure 4As shown in Figure (2), the first piston 40 is provided with a fluid flow hole 42 that extends to the receiving groove 41. A gasket 43 is provided in the receiving groove 41, and the gasket 43 is provided with a through hole 431 that communicates with the fluid flow hole 42. A one-way ball valve 44 can be provided in the fluid flow hole 42. The one-way ball valve 44 allows the hydraulic oil to flow only from the space on the side of the first piston 40 that is close to the rotating shaft 20 to the space on the other side of the first piston 40.

[0049] The shim 43 can change the distance by which the ball 50 protrudes from the end of the first piston 40, thereby facilitating the adjustment of the deflection angle of the ball 50 relative to the axis of the first piston 40 when the rotating shaft 20 is held in the first positioning position, which means that the angle of the door when it is closed can be adjusted.

[0050] In the specification and claims of this application, the terms "comprising / including" and "having / including" and variations thereof are used to specify the presence of the stated features, values, steps or components, but do not exclude the presence or addition of one or more other features, values, steps, components or combinations thereof.

[0051] Some features of this invention are described in different embodiments for clarity; however, these features may also be described in combination in a single embodiment. Conversely, some features of this invention are described only in a single embodiment for brevity; however, these features may also be described individually or in any suitable combination in different embodiments.

[0052] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hinge, characterized in that, The hinge includes: case; A rotating shaft, on which a cam is provided, the cam having a supporting surface; First buffer; A first piston is disposed in the housing and can rotate circumferentially relative to the housing. The first piston is brought closer to the abutment surface by the first buffer. The end of the first piston is provided with a receiving groove. A sphere is disposed in the receiving groove, the circumferential cross-sectional area of ​​the receiving groove is larger than the diameter of the sphere, the sphere can move freely on the circumferential cross-section of the receiving groove, the sphere abuts against the abutting surface, and during the process of the rotating shaft rotating to the first positioning and holding position, the abutting surface squeezes the sphere, causing the sphere to gradually move away from the axis of the rotating shaft.

2. The hinge according to claim 1, characterized in that, The abutting surface includes a first abutting surface and a second abutting surface, and a protrusion is formed between the first abutting surface and the second abutting surface; When the rotating shaft is in the first positioning and holding position, the receiving groove is divided into a first space and a second space by the axis of the rotating shaft and the vertical surface of the protrusion. The center of the sphere can be located in the first space and the sphere abuts against the first abutting surface, or the center of the sphere can be located in the second space and the sphere abuts against the second abutting surface.

3. The hinge according to claim 2, characterized in that, The rotating shaft can be in a second positioning and holding position. When the rotating shaft rotates from the first positioning and holding position to the second positioning and holding position, the first abutting surface will squeeze the ball to move the ball from the first abutting surface to the second abutting surface, or the second abutting surface will squeeze the ball to move the ball from the second abutting surface to the first abutting surface.

4. The hinge according to claim 3, characterized in that, The first positioning position is the closed position, and the second positioning position is the open position.

5. The hinge according to any one of claims 1-4, characterized in that, The rotating shaft is provided with a positioning surface, and the housing is provided with a second piston and a second buffer. When the second piston abuts against the positioning surface by relying on the second buffer, the rotating shaft is positioned and held in the first positioning holding position.

6. The hinge according to claim 5, characterized in that, The positioning surface and the protrusion are disposed on both sides of the axis of the rotating shaft.

7. The hinge according to claim 1, characterized in that, The receiving groove is a regular groove that is rotationally symmetrical about the center of the axis of the first piston.

8. The hinge according to claim 7, characterized in that, The receiving groove is a circular groove or a polygonal groove.

9. The hinge according to claim 1, characterized in that, The first piston is provided with a liquid flow hole that extends to the receiving groove. A gasket is provided in the receiving groove, and the gasket is provided with a through hole that communicates with the liquid flow hole.

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