Hinge

Abstract

The hinge comprises a shell, a rotating shaft, a first buffer, a first piston and a ball, a cam is arranged on the rotating shaft and 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 and can rotate in the circumferential direction relative to 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] The invention relates to a hinge, and in particular to a hinge capable of making the opening and closing of a door smoother. Background Art

[0002] A hinge is a device that can be used for various doors to buffer when opening and closing. CN218150384U discloses a single-open hydraulic buffer glass door hinge, which includes a fixed seat 1, a movable seat 2 and a limit shaft mounting seat 3, wherein the fixed seat 1 is fixedly connected to the limit shaft mounting seat 3, the movable seat 2 is rotatably hingedly mounted on the limit shaft mounting seat 3 through 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 seat 2 corresponding to the limit cam 41, the extended end of the damper 5 contacts the fixed seat 1, the end of the cylinder end of the damper 5 is provided with a convex strip 51 corresponding to the limit cam 41, and the two sides of the damper 5 are respectively provided with a first spring 6 and a second spring 7 for providing a return force for the limit shaft 4, and the elastic force of the first spring 6 is greater than the elastic force of the second spring 7.

[0003] This patent has the following defects: 1. A limiting structure is required to ensure that the damper 5 cylinder body can only move axially and cannot rotate circumferentially, otherwise the angle of the convex strip 51 will be deviated, and the deflected convex strip 51 will not be able to stably abut against the limiting cam 41, resulting in unsmooth door opening and closing. However, since the door is frequently opened and closed, the damper 5 cylinder body will frequently move axially, which will cause the limiting structure to deform, and it cannot be guaranteed that the damper 5 cylinder body can only move axially and cannot rotate circumferentially. After a long time, the damper 5 cylinder body will still rotate circumferentially, that is, after a long time, the convex strip 51 will not be able to stably abut against the limiting cam 41; 2. When closing the door, when the convex tip of the limiting cam 41 squeezes the convex strip 51, it will cause the convex strip 51 to align with the convex tip. After closing the door, the door is prone to shaking. Summary of the invention

[0004] In view of this, it is necessary to provide a hinge that can make the door opening and closing smoother.

[0005] The present invention provides a hinge, comprising:

[0006] case;

[0007] A rotating shaft, wherein a cam is provided on the rotating shaft, and the cam has a supporting surface;

[0008] First buffer;

[0009] a first piston, the first piston being disposed in the housing and being rotatable relative to the housing, the first piston being inclined toward the abutting surface by relying on the first buffer, and an accommodating groove being disposed at an end of the first piston;

[0010] A sphere is arranged in the accommodating groove, the circumferential cross-sectional area of ​​the accommodating groove is larger than the diameter of the sphere, the sphere can move freely on the circumferential cross-sectional area of ​​the accommodating groove, the sphere abuts against the abutting surface, and when the rotating shaft rotates to the first positioning and holding position, the abutting surface squeezes the sphere so that the sphere gradually moves away from the axis of the rotating shaft.

[0011] Furthermore, the abutting surface includes a first abutting surface and a second abutting surface, and a convex tip is 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 accommodating groove is divided into a first space and a second space through the axis of the rotating shaft and the vertical surface of the protruding tip. 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 may 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 sphere so that the sphere moves from the first abutting surface to the second abutting surface, or the second abutting surface will squeeze the sphere so that the sphere moves from the second abutting surface to the first abutting surface.

[0014] Furthermore, the first positioning and holding position is a door-closing position, and the second positioning and holding position is a door-opening position.

[0015] Furthermore, a positioning surface is provided on the rotating shaft, and a second piston and a second buffer are provided in the housing. When the second piston abuts against the positioning surface by means of the second buffer, the rotating shaft is positioned and maintained at the first positioning and maintaining position.

[0016] Furthermore, the positioning surface and the protrusion are arranged on both sides of the axis of the rotating shaft opposite to each other.

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

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

[0019] Furthermore, a liquid flow hole penetrating to the receiving groove is provided at the first piston, a gasket is provided in the receiving groove, and a through hole communicating with the liquid flow hole is provided on the gasket.

[0020] The present invention has the following beneficial effects: if the first piston rotates circumferentially, the ball can move freely in the accommodating groove and during the rotation of the rotating shaft, the ball always maintains point contact with the supporting surface; during the rotation of the rotating shaft to the first positioning and holding position, the supporting surface squeezes the ball so that the ball gradually moves away from the axis of the rotating shaft; when the rotating shaft is about to reach the first positioning and holding position, the ball will limit the continued rotation of the rotating shaft to a certain extent, making it difficult for the rotating shaft to shake when it is in the first positioning and holding position; the present invention does not need to set a limiting structure to limit the first piston to only axial movement but not circumferential rotation; even if the first piston rotates circumferentially, it will not affect the smoothness of opening and closing the door. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a specific implementation mode of the present invention.

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

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

[0024] Figure 4 This is the state change diagram when the shaft rotates. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention. It is understood that the drawings are only provided for reference and illustration, and are not used to limit the present invention. The connection relationship shown in the drawings is only for the convenience of clear description and does 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 another component, or there may be an intermediate component at the same time. Unless otherwise defined, all technical and scientific terms used in this document have the same meaning as those generally understood by technicians in the technical field of the present invention. It should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0027] It should also be noted that in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] See also Figure 1-Figure 4 As shown, 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, and the first piston 40 can also rotate circumferentially relative to the housing 10 around its axis B. The first buffer 30 can be a spring or hydraulic oil, and is mainly used to provide a buffer force to the first piston 40.

[0030] The end of the first piston 40 is provided with a receiving groove 41, and the ball 50 is arranged in the receiving groove 41. 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-sectional area of ​​the receiving groove 41 .

[0031] In this embodiment, the accommodating groove 41 is a regular groove that is rotationally symmetrical around the axis B of the first piston 40 , and more specifically, a circular groove or a polygonal groove (such as a hexagonal groove or an octagonal groove, etc.) can be used.

[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, and the axis B of the first piston 40 is on the same vertical plane as the axis C of the rotating shaft 20. A cam 21 is provided on the rotating shaft 20, and the cam 21 has a supporting surface 211. When the rotating shaft 20 rotates, the cam 21 causes the first piston 40 to move axially relative to the housing 10, and the first buffer 30 causes the first piston 40 to tend to approach the supporting surface 211, so that the ball 50 abuts against the supporting surface 211.

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

[0034] The first positioning and holding position may be a door-closing position, and the second positioning and holding position may be a door-opening position.

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

[0036] If the first piston 40 rotates circumferentially, the ball 50 can move freely in the accommodating groove 41 and during the rotation of the rotating shaft 20, the ball 50 always maintains point contact with the abutting surface 211. During the rotation of the rotating shaft 20 to the first positioning and holding position, the abutting surface 211 squeezes the ball 50 so that the ball 50 gradually moves 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 limit the rotating shaft 20 from continuing to rotate to a certain extent. The ball 50 and the retaining mechanism 60 can jointly position the rotating shaft, so that the rotating shaft 20 is not easy to shake when it is in the first positioning and holding position. The present invention does not need to set a limiting structure to limit the first piston 40 to only axial movement but not circumferential rotation. 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 211 a and a second abutting surface 211 b , and a convex tip 211 c is formed between the first abutting surface 211 a and the second abutting surface 211 b , and the convex tip 211 c is vertical.

[0038] When the rotating shaft 20 is held at the first positioning holding position, the vertical plane passing through the axis C of the rotating shaft 20 and the protruding tip 211 c substantially coincides 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 at the two second positioning and holding positions respectively, the rotating angle of the rotating shaft 20 is 180 degrees.

[0040] Even if the first piston 40 rotates, when the rotating shaft 20 is in the first positioning and holding position, the vertical plane passing through the axis C of the rotating shaft 20 and the protruding tip 211c always divides the accommodating groove 41 into a first space 411 and a second space 412, and the center O of the sphere 50 can be located in the first space 411 and the sphere 50 can be in contact with the first contact surface 211a. Or conversely, the center O of the sphere 50 can be located in the second space 412 and the sphere 50 can be in contact with the second contact surface 211b.

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

[0042] like Figure 4As shown in the process from (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 squeezes the sphere 50 so that the sphere 50 moves from the first abutting surface 211a to the second abutting surface 211b, and the sphere 50 moves toward the second space 412 and is finally held in the second space 412.

[0043] Conversely, if Figure 4 As shown in the process from (3) to (2), when the rotating shaft 20 rotates clockwise to the first positioning and holding position, the second abutting surface 211b gradually squeezes the sphere 50, and the center O of the sphere 50 is 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 abutting surface 211b squeezes the sphere 50 so that the sphere 50 moves from the second abutting surface 211b to the first abutting surface 211a, and the sphere 50 moves to the first space 412 and finally remains in the first space 411.

[0044] The retaining mechanism 60 may include a first positioning surface 61, a second piston 62 and a second buffer 63. The first positioning surface 61 is provided on the rotating shaft 20. The second piston 62 and the second buffer 63 are provided in the housing 10. The second piston 62 relies on the second buffer 63 to resist the first positioning surface 61. At this time, the rotating shaft 20 is positioned and maintained in the first positioning holding position.

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

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

[0047] The holding mechanism 60 may include a second positioning surface 64, which is 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 maintained at the second positioning holding position. The holding mechanism 60 includes two second positioning surfaces 64, which are disposed opposite to each other.

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

[0049] The gasket 43 can change the distance that the ball 50 protrudes from the end of the first piston 40, so that the deflection angle of the rotating shaft 20 relative to the axis of the first piston 40 when the ball 50 maintains the rotating shaft 20 in the first positioning holding position can be adjusted by the gasket 43, that is, the angle of the door when it is closed can be adjusted.

[0050] In the specification and claims of the present application, the words "include / comprise" and the words "have / include" and their variations are used to specify the existence of stated features, values, steps or components, but do not exclude the existence or addition of one or more other features, values, steps, components or combinations thereof.

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

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

Claims

1. A hinge, characterized in that: The hinge comprises: case; A rotating shaft, wherein a cam is provided on the rotating shaft, and the cam has a supporting surface; First buffer; a first piston, the first piston being disposed in the housing and being rotatable relative to the housing, the first piston being inclined toward the abutting surface by relying on the first buffer, and an accommodating groove being disposed at an end of the first piston; A sphere is arranged in the accommodating groove, the circumferential cross-sectional area of ​​the accommodating groove is larger than the diameter of the sphere, the sphere can move freely on the circumferential cross-sectional area of ​​the accommodating groove, the sphere abuts against the abutting surface, and when the rotating shaft rotates to the first positioning and holding position, the abutting surface squeezes the sphere so that the sphere gradually moves away from the axis of the rotating shaft.

2. The hinge according to claim 1, characterized in that: The abutting surface comprises a first abutting surface and a second abutting surface, and a convex tip 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 accommodating groove is divided into a first space and a second space through the axis of the rotating shaft and the vertical surface of the protruding tip. 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 may 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 may squeeze the sphere so that the sphere moves from the first abutting surface to the second abutting surface, or the second abutting surface may squeeze the sphere so that the sphere moves from the second abutting surface to the first abutting surface.

4. The hinge according to claim 3, characterized in that: The first positioning and holding position is a door closing position, and the second positioning and holding position is a door opening position.

5. The hinge according to any one of claims 1 to 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 means of the second buffer, the rotating shaft is positioned and maintained at the first positioning and maintaining position.

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

7. The hinge according to claim 1, characterized in that: The accommodating groove is a regular groove that is rotationally symmetrical around the axis center 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 which penetrates to the containing groove, the containing groove is provided with a gasket, and the gasket is provided with a through hole which communicates with the liquid flow hole.

Images