Composite joint hinge

Abstract

The utility model relates to the technical field of hinges, in particular to a composite joint hinge. The first connecting rod and the second connecting rod are rotationally connected to the center shaft, and the two ends of the first connecting rod and the two ends of the second connecting rod are connected to the fixed shafts and the movable shafts of the two connecting frames in a staggered mode to form a four-connecting-rod structure, so that the ends, connected with the fixed shafts, of the first connecting rod and the second connecting rod can rotate with the fixed shafts as rotation centers; the movable shafts connected with the other ends of the first connecting rod and the second connecting rod are driven to move, so that when the hinge is opened, the movable shafts on the two connecting frames can be driven by the first connecting rod and the second connecting rod to get close to each other, and the two connecting frames get away from each other under the action of the first connecting rod and the second connecting rod; therefore, the hinge has a larger opening angle; meanwhile, when the hinge is closed, the two connecting frames can be driven by respective movable shafts to get close to each other, so that a gap during closing is reduced, and the hinge can be conveniently applied to equipment needing airtight work.

Description

Technical Field

[0001] The utility model relates to the technical field of hinges, in particular to a composite joint hinge. Background Art

[0002] A hinge is a mechanical structure used to connect two objects and allow them to rotate relative to each other. It has been widely used in furniture, electrical appliances, automobiles and other industries. Current hinges are usually composed of two connecting plates and a pin connecting the two connecting plates. The two connecting plates are respectively connected to the door body and the door frame body, thereby achieving relative rotation between the door body and the door frame body.

[0003] However, when this type of hinge is used in practice, a certain gap needs to be left between the door body and the door frame body for the pin shaft to be set, which makes it difficult to use in scenarios that require closed work, such as refrigerators and drum washing machines; at the same time, the two connecting plates of this type of hinge in the prior art cannot adjust the matching gap between each other, which limits the opening and closing angle and affects customer use. Utility Model Content

[0004] In order to solve the problems in the above-mentioned background technology, the utility model provides a composite joint hinge, which is convenient for use in occasions where sealing is required and has a large opening and closing angle, making it easy to use.

[0005] The solution adopted by the utility model to solve its technical problems is: a composite joint hinge, including a hinge assembly and a connecting frame connected to the two ends of the hinge assembly, the hinge assembly includes a central axis and a first connecting rod and a second connecting rod rotatably mounted on the central axis, the connecting frame is respectively provided with a fixed axis and a movable axis, the two ends of the first connecting rod and the second connecting rod are staggeredly connected to the fixed axis and the movable axis of the two connecting frames.

[0006] Furthermore, a guide groove is provided on the connecting frame, and the movable shaft is movably installed in the guide groove and can approach or move away from the hinge assembly along the guide groove.

[0007] Furthermore, a driving assembly is provided at one end of any of the connecting frames, and the driving assembly is connected to the movable shaft and drives the movable shaft to move along the guide groove.

[0008] Furthermore, the driving assembly includes an installation shell, a driving motor arranged in the installation shell and a driving screw rod which is transmission-connected to the driving motor. A movable nut is provided on the movable shaft. The driving screw rod passes through the movable nut and is threadedly connected to the movable nut. The end of the driving screw rod is rotationally connected to the connecting frame.

[0009] Furthermore, a rotating assembly is also provided in the installation shell, and the rotating assembly is connected to the connecting frame to drive the connecting frame to rotate so that the hinge rotates as a whole.

[0010] Furthermore, the rotating assembly includes a rotating motor fixedly installed in the mounting shell and a gear ring end cover rotatably installed at the end of the shell, the output shaft of the rotating motor is transmission-connected with the gear ring end cover to drive the gear ring end cover to rotate, and the connecting frame is fixedly connected to the end face of the gear ring end cover.

[0011] Furthermore, the cross-section of the gear ring end cover is a "["-shaped structure, including a connecting end face and an edge arranged around the outer periphery of the connecting end face, the connecting frame is fixedly connected to the outer side of the connecting end face, the inner side of the edge is provided with internal teeth, and the output end of the rotating motor is provided with a rotating gear meshing with the internal teeth.

[0012] Furthermore, an opening is provided at the center of the connecting end surface, and the output shaft of the driving motor passes through the opening and is connected to the driving screw rod.

[0013] Furthermore, a connecting end cover is rotatably mounted on one end of the mounting shell away from the gear ring end cover, and a limiting connecting column extending into the mounting shell and fixedly connected to the connecting end cover is provided on the inner side of the connecting end surface.

[0014] Furthermore, a limit block is provided on the inner wall of the mounting shell for abutting against the limit connecting column to limit the rotation angle of the gear ring end cover.

[0015] To sum up, the beneficial effects of the utility model are as follows: the utility model forms a four-bar structure by rotatably connecting the first connecting rod and the second connecting rod on the central axis, and connecting the two ends of the first connecting rod and the second connecting rod to the fixed axis and the movable axis of the two connecting frames in an alternating manner, so that the ends of the first connecting rod and the second connecting rod connected to the fixed axis can rotate with the fixed axis as the rotation center, driving the movable axis connected to the other ends of the first connecting rod and the second connecting rod to move, so that when the hinge is opened, the movable axes on the two connecting frames can approach each other under the drive of the first connecting rod and the second connecting rod respectively, so that the two connecting frames are moved away from each other under the action of the first connecting rod and the second connecting rod, thereby making the hinge have a larger opening angle; at the same time, when the hinge is closed, the two connecting frames can also approach each other under the drive of their respective movable axes to reduce the gap during closing, which is convenient for acting in equipment that requires closed work.

[0016] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of this embodiment;

[0018] Figure 2 This is a schematic diagram of the structure of the embodiment when the hinge is closed;

[0019] Figure 3 is a schematic diagram of the structure of the driving component of this embodiment;

[0020] Figure 4 This is a schematic diagram of the structure of the gear ring end cover and the mounting housing when they are disassembled;

[0021] Figure 5 is a cross-sectional view of this embodiment;

[0022] Figure 6 An exploded view of the installation of the housing, the gear ring end cover and the connecting end cover of this embodiment;

[0023] Figure 7 Schematic diagram of the structure of the rotating assembly of this embodiment.

[0024] In the figure: 1. hinge assembly; 11. central axis; 12. first connecting rod; 13. second connecting rod; 2. connecting frame; 21. fixed axis; 22. movable axis; 23. guide groove; 3. driving assembly; 31. mounting shell; 311. limit block; 32. driving motor; 33. driving screw; 4. moving nut; 5. rotating assembly; 51. rotating motor; 511. rotating gear; 52. gear ring end cover; 521. connecting end face; 522. edge; 523. inner tooth; 524. limit connecting column; 525. opening; 6. connecting end cover; 7. bushing. DETAILED DESCRIPTION

[0025] In order to make the content of the utility model more clearly understood, the utility model is further described below based on specific embodiments in combination with the accompanying drawings.

[0026] It should be noted that the terms "center", "upper", "lower", "front", "back", "left", "right", "inner", "outer" and the like used herein to indicate directions or positional relationships are based on directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. Unless otherwise specified, "plurality" means two or more.

[0027] 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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood by specific circumstances.

[0028] like Figures 1 to 3 As shown, a composite joint hinge has a larger opening and closing angle and a smaller closing gap, which is convenient for use on doors of equipment that require a sealed working environment, such as refrigerators and washing machines; the composite joint hinge of this embodiment includes a hinge assembly 1 and connecting frames 2 connected to both ends of the hinge assembly 1, and the two connecting frames 2 can be connected to the door body or door frame respectively, so that the door can be opened and closed through the hinge assembly 1.

[0029] Specifically, Figure 1 and Figure 2 As shown, the hinge assembly 1 of this embodiment includes a central axis 11, a first connecting rod 12 and a second connecting rod 13, wherein the middle and both ends of the first connecting rod 12 and the second connecting rod 13 are provided with hinge holes, and the first connecting rod 12 and the second connecting rod 13 are rotatably mounted on the central axis 11 through the hinge holes in the middle, and the two ends of the first connecting rod 12 and the second connecting rod 13 are hinged on two connecting frames 2, so that the first connecting rod 12 and the second connecting rod 13 can rotate with the central axis 11 as the rotation axis, and drive the connecting frames 2 on both sides to realize the opening and closing of the hinge.

[0030] At the same time, the connecting frame 2 of this embodiment is respectively provided with a fixed axis 21 and a movable axis 22, wherein the fixed axis 21 is arranged at one end of the two connecting frames 2 close to each other, and the movable axis 22 is arranged in parallel with the fixed axis 21 and can move in a direction close to or away from the hinge assembly 1; for the convenience of understanding, the two connecting frames 2 are respectively referred to as the first connecting frame 2 and the second connecting frame 2 below. In this embodiment, the hinge hole at one end of the first connecting rod 12 is installed on the fixed axis 21 of the first connecting frame 2, and the hinge hole at the other end is installed on the movable axis 22 of the second connecting frame 2, and the hinge hole at one end of the second connecting rod is installed on the movable axis 22 of the first connecting frame 2. The hinge hole at the other end of the second connecting rod 13 is installed on the shaft 22, and the hinge hole at the other end of the second connecting rod 13 is installed on the fixed shaft 21 of the second connecting frame 2, so that the first connecting rod 12, the second connecting rod 13, the first connecting frame 2 and the second connecting frame 2 of this embodiment can be combined to form a four-bar linkage. When the first connecting frame 2 and the second connecting frame 2 are opened and closed, the ends of the first connecting rod 12 and the second connecting rod 13 connected to the fixed shaft 21 can rotate with the fixed shaft 21 as the rotation axis, driving the movable shaft 22 connected to the other ends of the first connecting rod 12 and the second connecting rod 13 to move, thereby obtaining a larger opening and closing angle and a smaller closing gap, which is convenient for acting on the doors of equipment such as refrigerators and washing machines.

[0031] like Figure 1 and Figure 3As shown, when the hinge is opened, the movable shafts 22 on the two connecting frames 2 can approach each other under the drive of the first connecting rod 12 and the second connecting rod 13, so that the two connecting frames 2 move away from each other under the action of the first connecting rod 12 and the second connecting rod 13, thereby making the opening angle of the hinge larger; when the hinge is closed, the movable shafts 22 on the two connecting frames 2 move in the direction away from the fixed shaft 21 under the drive of the first connecting rod 12 and the second connecting rod 13, thereby making the two connecting frames 2 approach each other to reduce the gap, thereby facilitating the role in equipment that requires closed work.

[0032] like Figures 1 to 3 As shown, a guide groove 23 for the movable shaft 22 to move is provided on the connecting frame 2 of this embodiment, wherein the guide groove 23 is located at the rear side of the fixed shaft 21 and extends in a direction away from the fixed shaft 21, so that the movable shaft 22 can move along the guide groove 23 towards or away from the hinge assembly 1, thereby pulling the first connecting rod 12 and the second connecting rod 13 to realize the opening and closing of the two connecting frames 2.

[0033] Specifically, sliders are provided at both ends of the movable shaft 22 of this embodiment, and the sliders are adapted to the guide groove 23 and movably engaged in the guide groove 23, so that the movable shaft 22 can move along the guide groove 23 driven by the sliders.

[0034] like Figures 1 to 3 As shown, the first connecting rod 12 and the second connecting rod 13 of this embodiment are provided with multiple ones, and the first connecting rod 12 and the second connecting rod 13 are arranged alternately in sequence, so that the hinge of this embodiment can improve the load-bearing capacity under the action of multiple first connecting rods 12 and second connecting rods 13, which is convenient for acting on heavy doors.

[0035] In order to realize the automatic opening and closing of the door, the present embodiment further provides a driving assembly 3 on one side of the connecting frame 2, so that the hinge can be automatically opened or closed under the action of the driving assembly 3; Figures 1 to 3 As shown, the driving assembly 3 of this embodiment is arranged at one end of the first connecting frame 2 away from the hinge assembly 1, and the driving assembly 3 is connected to the movable shaft 22 on the first connecting frame 2, so that the movable shaft 22 can move along the guide groove 23 driven by the driving assembly 3, thereby realizing automatic opening and closing of the hinge.

[0036] Specifically, the driving assembly 3 of the present embodiment includes a mounting shell 31, a driving motor 32 and a driving screw 33. The mounting shell 31 of the present embodiment is fixedly connected to one end of the connecting frame 2 away from the hinge assembly 1. The driving motor 32 is fixed in the mounting shell 31 and its output shaft extends out of the mounting shell 31 and is transmission-connected to the driving screw 33. The driving screw 33 is threadedly connected to the movable shaft 22, so that the driving screw 33 can rotate under the drive of the driving motor 32, thereby driving the movable shaft 22 to move along the guide groove 23 to realize the opening and closing of the hinge.

[0037] like Figure 3As shown, a driving gear is provided at the output end of the driving motor 32 of the present embodiment, and a driven gear is provided at one end of the driving screw rod 33 connected to the driving motor 32, wherein the driving gear meshes with the driven gear, thereby realizing a transmission connection between the driving motor 32 and the driving screw rod 33; in addition, a moving nut 4 is fixedly mounted on the movable shaft 22 of the present embodiment, the driving screw rod 33 passes through the moving nut 4 and is threadedly connected with the moving nut 4, and at the same time, the end of the driving screw rod 33 is connected to the connecting frame 2 and can rotate freely, so that when the driving screw rod 33 rotates, the moving nut 4 can be moved along the thread straight line of the driving screw rod 33 under the action of the threaded connection; the driving screw rod 33 of the present embodiment is arranged in parallel with the guide groove 23, so that the movable shaft 22 can move along the guide groove 23 driven by the driving screw rod 33, thereby realizing automatic opening and closing of the hinge.

[0038] In order to realize the multi-directional rotation of the door body and enrich the functions of the door body, such as Figure 4 and Figure 5 As shown, this embodiment also provides a rotating assembly 5 in the mounting shell 31, so that after the door body is opened, the door body and the door frame can be relatively rotated at another angle under the action of the rotating assembly 5, so that the door body can be placed horizontally or vertically, realizing the multifunctional use of the door body.

[0039] The rotating assembly 5 of this embodiment is connected to the connecting frame 2 to drive the connecting frame 2 to rotate so that the hinge rotates as a whole, thereby realizing the rotation of the door body. Figure 4 As shown, the rotating assembly 5 of this embodiment includes a rotating motor 51 fixedly installed in the mounting shell 31 and a gear ring end cover 52 rotatably installed at the end of the shell, wherein the gear ring end cover 52 is fixedly connected to the connecting frame 2, and the rotating motor 51 is transmission-connected with the gear ring end cover 52, so that when the rotating motor 51 is started, it can drive the gear ring end cover 52 to rotate, and the gear ring end cover 52 drives the connecting frame 2 connected thereto to rotate, thereby realizing the rotation of the door body.

[0040] like Figure 5 As shown, the cross-section of the gear ring end cover 52 of the present embodiment is a "["-shaped structure, including a connecting end face 521 and an edge 522 arranged on the end face of the connecting end face 521 close to the mounting shell 31. The outer diameter of the edge 522 of the present embodiment is adapted to the inner diameter of the end of the mounting shell 31, so that the gear ring end cover 52 can be rotatably mounted on the end of the mounting shell 31 through the edge 522; the connecting frame 2 is fixedly connected to the outer side of the connecting end face 521, and the inner side of the edge 522 is provided with internal teeth 523, and the output end of the rotating motor 51 is provided with a rotating gear 511 meshing with the internal teeth 523, so that after the rotating motor 51 is started, the rotating gear 511 meshes with the internal teeth 523 to drive the gear ring end cover 52 to rotate as a whole, thereby rotating the connecting frame 2 connected to the outer side of the connecting end face 521, and then the door body can be rotated at different angles.

[0041] like Figure 6 and Figure 7 As shown, in order to improve the load-bearing capacity of the present embodiment and prevent the gear ring end cover 52 from falling off from the end face of the mounting shell 31 when connecting a heavier object, the present embodiment also rotatably installs a connecting end cover 6 at the end of the mounting shell 31 away from the gear ring end cover 52, and the inner end face of the gear ring end cover 52 is provided with a limiting connecting column 524 extending into the mounting shell 31, and the inner side surface of the connecting end cover 6 can abut against the limiting connecting column 524 and be fixed by bolts, so that the gear ring end cover 52 is connected to the connecting end cover 6, and the bearing force on the gear ring end cover 52 can be dispersed, so as to prevent the gear ring end cover 52 from falling off due to excessive force, thereby improving the overall bearing capacity of the hinge of the present embodiment. Furthermore, in order to improve the connection strength and rotation effect between the connecting end cover 6 and the gear ring end cover 52, the present embodiment further installs a shaft sleeve 7 on the edge 522 where the connecting end cover 6 and the gear ring end cover 52 are inserted into the mounting shell 1, which can effectively improve the strength of the connection between the gear ring end cover 52 and the connecting end cover 6 and the mounting shell 1 respectively, and make the rotation of the two smoother, thereby facilitating the rotation of the hinge of the present embodiment.

[0042] like Figure 7 As shown, the inner wall of the mounting shell 31 of the present embodiment is also provided with a limit block 311, and the limit block 311 can abut against the limit connecting column 524 to limit the rotation position of the gear ring end cover 52, so as to realize the specific function of the door body; specifically, the limit connecting column 524 of the present embodiment is provided with two and is symmetrically arranged at the top and bottom of the connecting end face 521, and at the same time, the limit block 311 is provided with four and the four limit connecting columns 524 are equidistantly arranged around the end face of the mounting shell 31, after the gear ring end cover 52 is installed, the two limit connecting columns 524 are inserted into the mounting shell 31 and fixedly connected to the connecting end cover 6, and abut against the sides of any two symmetrical limit blocks 311, so that when the gear ring end cover 52 rotates driven by the rotating motor 51, the two limit connecting columns 524 can abut against the sides of the other two symmetrical limit blocks 311, thereby realizing the limitation of the rotation angle of the door panel.

[0043] In order to prevent the rotating assembly 5 from affecting the automatic opening and closing of the hinge assembly 1, Figure 1 , Figure 2 and Figure 6 As shown, an opening 525 is provided at the center of the connecting end surface 521 of the gear ring end cover 52 of this embodiment, and the output shaft of the drive motor 32 passes through the opening 525 and is connected to the drive screw 33, so that when the rotating motor 51 drives the gear ring end cover 52 to rotate, the drive motor 32 can avoid being affected, so that the hinge of this embodiment can automatically open and close even after being reversed.

[0044] In summary, the beneficial effects of the utility model are as follows: in this embodiment, the first connecting rod 12 and the second connecting rod 13 are rotatably connected to the central axis 11, and the two ends of the first connecting rod 12 and the second connecting rod 13 are staggeredly connected to the fixed axis 21 and the movable axis 22 of the two connecting frames 2 to form a four-bar structure, so that the ends of the first connecting rod 12 and the second connecting rod 13 connected to the fixed axis 21 can rotate with the fixed axis 21 as the rotation center, driving the movable axis 22 connected to the other ends of the first connecting rod 12 and the second connecting rod 13 to move, so that when the hinge is opened, the movable axis 22 on the two connecting frames 2 can approach each other under the drive of the first connecting rod 12 and the second connecting rod 13, and the two connecting frames 2 can move away from each other, thereby making the hinge have a larger opening angle; at the same time, when the hinge is closed, the two connecting frames 2 can also approach each other under the drive of their respective movable axis 22 to reduce the gap during closing, which is convenient for acting in equipment that requires closed work.

[0045] The embodiments described above are only preferred implementation modes of the present utility model and cannot be used to limit the protection scope of the present utility model. Any non-substantial changes and modifications made by technicians in this field on the basis of the utility model shall fall within the protection scope of the present utility model.

Claims

1. A composite joint hinge, comprising a hinge assembly (1) and a connecting frame (2) connected to both ends of the hinge assembly (1), characterized in that: The hinge assembly (1) comprises a central axis (11) and a first connecting rod (12) and a second connecting rod (13) rotatably mounted on the central axis (11); a fixed axis (21) and a movable axis (22) are respectively provided on the connecting frame (2); and the two ends of the first connecting rod (12) and the second connecting rod (13) are staggeredly connected to the fixed axis (21) and the movable axis (22) of the two connecting frames (2).

2. A composite joint hinge according to claim 1, characterized in that: A guide groove (23) is provided on the connecting frame (2), and the movable shaft (22) is movably installed in the guide groove (23) and can move closer to or farther from the hinge assembly (1) along the guide groove (23).

3. A composite joint hinge according to claim 2, characterized in that: A driving assembly (3) is provided at one end of any of the connecting frames (2); the driving assembly (3) is connected to the movable shaft (22) and drives the movable shaft (22) to move along the guide groove (23).

4. A composite joint hinge according to claim 3, characterized in that: The driving assembly (3) comprises a mounting housing (31), a driving motor (32) disposed in the mounting housing (31), and a driving screw (33) drivingly connected to the driving motor (32); a moving nut (4) is disposed on the movable shaft (22); the driving screw (33) passes through the moving nut (4) and is threadedly connected to the moving nut (4); and the end of the driving screw (33) is rotatably connected to the connecting frame (2).

5. A composite joint hinge according to claim 4, characterized in that: A rotating assembly (5) is also provided in the installation shell (31), and the rotating assembly (5) is connected to the connecting frame (2) to drive the connecting frame (2) to rotate so that the hinge rotates as a whole.

6. A composite joint hinge according to claim 5, characterized in that: The rotating assembly (5) comprises a rotating motor (51) fixedly mounted in a mounting housing (31) and a gear ring end cover (52) rotatably mounted on an end of the housing; an output shaft of the rotating motor (51) is transmission-connected to the gear ring end cover (52) to drive the gear ring end cover (52) to rotate; and the connecting frame (2) is fixedly connected to an end surface of the gear ring end cover (52).

7. A composite joint hinge according to claim 6, characterized in that: The gear ring end cover (52) has a cross-section of a "["-shaped structure, comprising a connecting end face (521) and an edge (522) arranged around the outer periphery of the connecting end face (521); the connecting frame (2) is fixedly connected to the outer side of the connecting end face (521); the inner side of the edge (522) is provided with internal teeth (523); and the output end of the rotating motor (51) is provided with a rotating gear (511) meshing with the internal teeth (523).

8. A composite joint hinge according to claim 7, characterized in that: An opening (525) is provided at the center of the connecting end surface (521), and the output shaft of the driving motor (32) passes through the opening (525) to be connected to the driving screw rod (33).

9. The composite joint hinge according to claim 7, characterized in that: A connecting end cover (6) is rotatably mounted on one end of the mounting shell (31) away from the gear ring end cover (52), and a limiting connecting column (524) extending into the mounting shell (31) and fixedly connected to the connecting end cover (6) is provided on the inner side of the connecting end surface (521).

10. A composite joint hinge according to claim 9, characterized in that: The inner wall of the installation housing (31) is provided with a limit block (311) for abutting against the limit connection column (524) to limit the rotation angle of the gear ring end cover (52).

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