Rotary hinge

Abstract

The rotary hinge comprises a fixed hinge body and a rotary arm, the fixed hinge body is provided with symmetrical connecting plates, and the connecting plates are provided with connecting holes; the rotating arm penetrates through the connecting hole through the rotating shaft group and is rotatably connected with the fixed hinge; the rotating shaft set comprises a fixing shaft, a rotating shaft and a limiting piece, the fixing shaft is sleeved with the rotating shaft, and the rotating arm is installed on the rotating shaft in an interference fit mode and limited in the axial direction through the limiting piece. The hinge is simple in structure, easy to manufacture, low in cost and capable of being applied to light-load environments and scenes with turnover functions, and the rotating arm is large in rotatable angle, stable in rotation and stable in overall assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to hinge technical field, more specifically relates to a rotary hinge. BACKGROUND

[0002] Hinge is connected two components, and can realize the relative rotation between two components.

[0003] For example, the hinge applied to the cabinet and wardrobe is a common hinge structure, which generally has a fixed hinge and a movable hinge connected by a rotating shaft, and the opening angle of the wardrobe door is generally 90°. For another example, the hinge applied to small household appliances such as microwave ovens and ovens generally has a shell, a buffer assembly, an arm, and the like. The hinge structure is more complex than the hinge applied to the cabinet and wardrobe, has a buffering effect during opening and closing, and the maximum opening angle is 120°.

[0004] However, according to the actual use needs, the above-mentioned existing hinge is obviously not suitable for some light load and large rotation angle products. INVENTION CONTENTS

[0005] Therefore, the utility model provides a rotary hinge.

[0006] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme: a rotary hinge, comprising: a fixed hinge and a rotating arm, the fixed hinge is provided with symmetrical connecting plates, and the connecting plates are provided with connecting holes; the rotating arm is rotatably connected with the fixed hinge through a rotating shaft group penetrating the connecting holes; the rotating shaft group comprises: a fixed shaft, a rotating shaft, and a limiting piece, the rotating shaft is sleeved outside the fixed shaft, the rotating arm is installed on the rotating shaft in interference fit and is limited in the axial direction by the limiting piece.

[0007] As a preferred scheme of the utility model, the rotating shaft is provided with a knurl corresponding to the position of the rotating arm.

[0008] As a preferred scheme of the utility model, the two end faces of the rotating shaft are in contact with the inner side faces of the connecting plates.

[0009] As a preferred scheme of the utility model, the fixed hinge has a mounting plate, and the connecting plates are perpendicular to the mounting plate; the mounting plate is provided with a slot corresponding to the position of the rotating arm.

[0010] As a preferred scheme of the utility model, the width of the slot is greater than the thickness of the rotating arm.

[0011] As a preferred scheme of the utility model, the limiting piece is a limiting snap ring.

[0012] As a preferred one of the utility model, the rotating arm includes the arc segment and the straight rod segment which are integrally made, the opening end of the arc segment is installed on the rotating shaft, and the tail end of the arc segment is connected with the straight rod segment.

[0013] Via the technical scheme, compared with the prior art, the utility model has the following beneficial technical effects: the hinge has simple structure, easy manufacturing, low cost, is applied in the scene with the turnover function in the light load environment, and the rotating angle of the rotating arm is large, rotation is stable, and overall assembly is stable. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only the embodiments of the utility model, and for the ordinary skilled person in the art, other drawings can be obtained according to the provided drawings without the creative labor.

[0015] Fig. 1 It is the structural schematic diagram of the utility model;

[0016] Fig. 2 It is the explosion drawing of the utility model;

[0017] Fig. 3 It is the schematic diagram after the rotating arm of the utility model rotates. DETAILED DESCRIPTION

[0018] The present application will now be described further to with reference to the drawings. These drawings show only the essential features of the application and are not to scale; they are merely schematic representations showing the general structure of the application.

[0019] Rotary hinge, please refer to Figs. 1-3 As shown, it comprises a fixed hinge 100 and a rotating arm 200, the fixed hinge 100 is provided with symmetrical connecting plates 110 and mounting plates 120, the mounting plates 120 are used to assemble the fixed hinge 100 on the first mounting body, the connecting plates 110 are perpendicular to the mounting plates 120, and the mounting plates 120 and the connecting plates 110 are integrally made of high-hardness metal material.

[0020] The connecting plates 110 are provided with connecting holes 111, the rotating arm 200 is rotatably connected with the fixed hinge 100 by rotating shaft groups 300 through the connecting holes 111.

[0021] The rotating shaft groups 300 comprise fixed shafts 310, rotating shafts 320 and limiting pieces 330, the rotating shafts 320 are sleeved outside the fixed shafts 310, the rotating arm 200 is installed on the rotating shafts 320 in interference fit and is limited in the axial direction by the limiting pieces 330.

[0022] Specifically, the rotating arm 200 is provided with a through hole, the rotating shaft 320 is sleeved on the fixed shaft 310, and the rotating shaft 320 passes through the through hole of the rotating arm 200. A groove 321 is provided on the circumferential surface of the middle part of the rotating shaft 320. The rotating arm 200 strengthens the connection with the rotating shaft 320 through the groove 321 to achieve interference fit.

[0023] The limiting member 330 is installed on both sides of the rotating arm 200 to clamp the rotating arm 200. The limiting member 330 can be designed as a limiting ring.

[0024] Optionally, one of the limiting members 330 can be integrally formed with the rotating shaft 320, and the other limiting member 330 can be installed after the rotating arm 200 is installed on the rotating shaft 320 to clamp the rotating arm 200, thereby achieving axial limiting of the rotating arm 200 on the rotating shaft 320 and improving the stability of the absolute position of the rotating arm 200 in both dynamic and static states.

[0025] After assembly, the two end faces of the rotating shaft 320 contact the inner side of the connecting plate 110, increasing the contact area between the two end faces of the rotating shaft 320 and the connecting plate 110, thereby improving the reliability and stability of the rotation function.

[0026] The rotating arm 200 includes an integrally formed arc-shaped segment 210 and a straight rod segment 220. The beginning of the arc-shaped segment 210 is installed on the rotating shaft 320, and the end of the arc-shaped segment 210 is connected to the straight rod segment 220. This design of the rotating arm 200 results in a small rotation radius but a large rotation angle.

[0027] In one embodiment, the mounting plate 120 is provided with a slot 121 corresponding to the position of the rotating arm 200, and the width of the slot 121 is greater than the thickness of the rotating arm 200.

[0028] When using, such as Fig. 3 As shown, the rotating arm 200 along Fig. 3 When rotated in the direction indicated by the arrow, the rotating arm 200, when rotated to its maximum angle, abuts against the mounting plate 120 of the fixed hinge 100; the rotating arm 200 along... Fig. 3 When rotating in the opposite direction as indicated by the arrow, the rotating arm 200 can be partially engaged in the slot 121, effectively increasing the rotation angle of the rotating arm 200.

[0029] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rotary hinge comprising: The fixed hinge (100) is provided with symmetrical connecting plates (110) provided with connecting holes (111), and the rotating arm (200) is rotatably connected with the fixed hinge (100) through a rotating shaft group (300) penetrating through the connecting holes (111); the rotating shaft group (300) comprises a fixed shaft (310), a rotating shaft (320) and a limiting piece (330), the rotating shaft (320) is sleeved outside the fixed shaft (310), the rotating arm (200) is installed on the rotating shaft (320) in interference fit and is limited in the axial direction by the limiting piece (330).

2. The rotary hinge of claim 1, wherein: The rotating shaft (320) is provided with a knurl (321) corresponding to the position of the rotating arm (200).

3. The rotary hinge of claim 1, wherein: The two end faces of the rotating shaft (320) are in contact with the inner side faces of the connecting plates (110).

4. The rotary hinge of claim 1, wherein: The fixed hinge (100) has a mounting plate (120), and the connecting plates (110) are perpendicular to the mounting plate (120); the mounting plate (120) is provided with a slot (121) corresponding to the position of the rotating arm (200).

5. The rotary hinge of claim 4, wherein: The width of the slot (121) is greater than the thickness of the rotating arm (200).

6. The rotary hinge of claim 1, wherein: The limiting piece (330) is a limiting snap ring.

7. The rotary hinge of claim 1, wherein: The rotating arm (200) comprises an integral arc-shaped section (210) and a straight rod section (220), the open end of the arc-shaped section (210) is installed on the rotating shaft (320), and the tail end of the arc-shaped section (210) is connected with the straight rod section (220).

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