A hinge mechanism with variable damping

Abstract

The application discloses a hinge mechanism with variable damping, and relates to the technical field of spaceflight, which comprises a fixed leaf, a movable leaf, a hinge shaft, a bushing, a gasket, a connecting pin, a first cam piece, a second cam piece, a disc spring, a third cam piece, a fourth cam piece and a limiting stopper; the fixed leaf is fixedly connected with a cabin body, the movable leaf is fixedly connected with a cabin door, and the hinge shaft is fixedly connected with the movable leaf; the first cam piece and the fourth cam piece are installed on the fixed leaf, and the second cam piece and the third cam piece are connected with the hinge shaft through the cooperation of square shafts and square grooves. When the cabin door is in a closed state, the hinge mechanism has no damping torque, so that the cooperation between the cabin door and the cabin body is not affected by the rebound effect caused by the damping torque at the moment when the cabin door is closed by an astronaut; during the opening process of the cabin door, the hinge mechanism generates a damping torque which gradually increases to a stable value, and the damping torque can prevent the cabin door from drifting in a weightless environment in space.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of aerospace technology, and in particular to a hinge mechanism with variable damping. BACKGROUND

[0002] With the development of aerospace engineering, especially manned space technology and space station technology, more and more equipment on some spacecraft, such as large space telescopes, need to be maintained and replaced by astronauts to prolong the service life of the spacecraft and improve the performance of the equipment. This requires astronauts to open and close the maintenance hatch at the corresponding equipment. In order to facilitate the operation of astronauts, the opened maintenance hatch is connected to the cabin body through a hinge mechanism.

[0003] Although the hatch hinge mechanism on the conventional manned spacecraft has good bearing capacity and high reliability, the mechanism system is too complex, heavy and bulky, and it is time-consuming and laborious to operate. Therefore, it is only suitable for manned spacecraft and not suitable for unmanned spacecraft. The hinge mechanism used by the conventional ground maintenance hatch usually adopts a simple hinge structure without built-in damping torque. In the weightless environment in space, the drift of the hatch can interfere with the on-orbit maintenance operation of astronauts and even pose a safety risk. Some hinge mechanisms with damping torque used by ground equipment usually use hydraulic damping devices or simply extrude parts to generate constant damping. They are not suitable for long-term use in a vacuum environment and are not suitable for operation by astronauts in a weightless environment in space.

[0004] Based on the above technical problems, the technical personnel in the field urgently need to develop a hinge mechanism with variable damping that can be applied to the connection between the maintenance hatch and the cabin body of a spacecraft and facilitate the on-orbit maintenance operation of astronauts. SUMMARY

[0005] The purpose of the present application is to provide a hinge mechanism with variable damping that can be applied to the connection between the maintenance hatch and the cabin body of a spacecraft and facilitate the on-orbit maintenance operation of astronauts.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] The hinge mechanism with variable damping of the present application comprises:

[0008] a fixed leaf fixedly connected to the cabin body; and

[0009] a movable leaf fixedly connected to the hatch;

[0010] a hinge shaft connected to the movable leaf through two connecting pins, both ends of the hinge shaft being connected to the fixed leaf;

[0011] a bushing installed at one end of the fixed leaf;

[0012] Two gaskets are arranged at the joint of the fixed leaf and the movable leaf;

[0013] A cam assembly is arranged on the fixed leaf away from the bushing, the cam assembly comprises a first cam member, a second cam member, a third cam member and a fourth cam member from bottom to top, the first cam member and the fourth cam member are connected with the fixed leaf respectively, the second cam member is inserted into the third cam member and the hinge shaft respectively at both ends, the first cam member and the fourth cam member form a fixed cam, and the second cam member and the third cam member form a movable cam;

[0014] The hinge mechanism further comprises:

[0015] A plurality of disc springs are arranged in a straight-line combination between the second cam member and the third cam member;

[0016] A limiting block is fixedly connected to the fixed leaf.

[0017] Further, the fixed leaf is provided with a first lug and a second lug at both ends matched with the movable leaf, the first lug is provided with a hexagonal groove, and the first cam member is installed on the first lug through the hexagonal groove;

[0018] The first lug extends outwardly to form a cavity structure, and the end of the cavity structure is provided with a first connecting lug;

[0019] A plurality of fixed leaf connecting members are arranged on the fixed leaf for connecting the fixed leaf with the cabin body.

[0020] Further, the movable leaf is configured as a movable leaf cylindrical segment at the part matched with the fixed leaf, and two gaskets are arranged at the joint of both ends of the movable leaf cylindrical segment and the fixed leaf respectively;

[0021] The movable leaf cylindrical segment is longitudinally provided with a second through hole penetrating through, matched with the hinge shaft;

[0022] The movable leaf cylindrical segment is transversely provided with two first pin holes for the connecting pin to pass through;

[0023] A plurality of movable leaf connecting members are arranged on the movable leaf for connecting the movable leaf with the hatch.

[0024] Further, one end of the hinge shaft is longitudinally provided with a first square groove, and one end of the second cam member is inserted into the first square groove;

[0025] The hinge shaft body is transversely provided with two second pin holes, and the connecting pin is respectively inserted through the first pin hole and the second pin hole to form an interference fit, so that the hinge shaft is fixedly connected with the movable leaf.

[0026] Further, the middle part of the bushing is provided with a third through hole for the hinge shaft to pass through;

[0027] And the outer edge of the bushing is provided with a plurality of bushing connecting pieces for connecting the bushing with the fixed leaf.

[0028] Further, the first cam piece is provided with a hexagonal shaft, and the first cam piece is installed on the fixed leaf through the cooperation of the hexagonal shaft and the hexagonal groove;

[0029] The upper end surface of the first cam piece forms a first cam surface, and the middle part of the first cam piece is provided with a first through hole for the hinge shaft to pass through.

[0030] Further, the two ends of the second cam piece are respectively provided with a first square shaft and a second square shaft, the first square shaft is inserted into the first square groove, so that the second cam piece is connected with the hinge shaft;

[0031] The middle position of the second cam piece is provided with an annular boss, the lower surface of the annular boss forms a second cam surface, and the upper surface of the annular boss is a plane, and the bottom of the disc spring is limited by the upper surface of the annular boss.

[0032] Further, the third cam piece includes a cam top disc and a cam cylinder, the upper surface of the cam top disc forms a third cam surface, the lower surface of the cam top disc is a plane, the top of the disc spring is limited by the lower surface of the cam top disc, and the cam cylinder passes through the inner hole of the disc spring;

[0033] The middle part of the third cam piece is provided with a second square groove, and the second square shaft is inserted into the second square groove, so that the third cam piece is connected with the second cam piece.

[0034] Further, the top surface of the inner cavity of the fourth cam piece forms a fourth cam surface, and the end part of the fourth cam piece is provided with a second connecting lug;

[0035] A plurality of top cover connecting pieces are arranged on the second connecting lug, which are used to connect the second connecting lug with the first connecting lug, so that the fourth cam piece and the cavity structure wrap the first cam piece, the second cam piece, the disc spring and the third cam piece connected in sequence.

[0036] Further, a plurality of limiting stop block connecting pieces are arranged on the limiting stop block, which are used to connect the limiting stop block with the fixed leaf.

[0037] Preferably, the fixed leaf, the movable leaf and the limiting block are provided with reinforcing ribs.

[0038] In the above technical solution, the hinge mechanism with variable damping provided by the application has the following beneficial effects:

[0039] The hinge mechanism with variable damping provided by the application has the following beneficial effects: In the above technical solution, the hinge mechanism with variable damping provided by the application has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0041] Figure 1 An assembly schematic diagram of the hinge mechanism with variable damping provided by the embodiment of the present application is provided.

[0042] Figure 2 A part split schematic diagram of the hinge mechanism with variable damping provided by the embodiment of the present application is provided.

[0043] Figure 3 A schematic diagram of the hinge mechanism with variable damping provided by the embodiment of the present application in the closed state of the hatch is provided.

[0044] Figure 4 A schematic diagram of the cam matching surface of the hinge mechanism with variable damping provided by the embodiment of the present application in the closed state of the hatch is provided.

[0045] Figure 5 A schematic diagram of the cam matching surface of the hinge mechanism with variable damping provided by the embodiment of the present application when gradually increasing damping is generated is provided.

[0046] Figure 6 A schematic diagram of the cam matching surface of the hinge mechanism with variable damping provided by the embodiment of the present application when stable and constant damping is generated is provided.

[0047] Figure 7 A stop position diagram of a hinge mechanism with variable damping provided by an embodiment of the present application when a hatch is opened to the maximum angle.

[0048] Explanation of reference signs:

[0049] Reference Name Reference Name Hinge mechanism 100 First through hole 1072 Fixed leaf 101 First cam surface 1073 First lug 1011 Second cam member 108 Second lug 1012 First square shaft 1081 Hexagonal groove 1013 Second square shaft 1082 Cavity structure 1014 Annular boss 1083 First connecting lug 1015 Second cam surface 1084 Fixed leaf connecting member 1016 Disc spring 109 Movable leaf 102 Third cam member 110 Movable leaf cylindrical segment 1021 Cam top disc 1101 Second through hole 1022 Cam cylinder 1102 First pin hole 1023 Second square groove 1103 Movable leaf connecting member 1024 Third cam surface 1104 Hinge shaft 103 Fourth cam member 111 First square groove 1031 Fourth cam surface 1111 Second pin hole 1032 Second connecting lug 1112 Bushing 104 Top cover connecting member 1113 Third through hole 1041 Limiting stopper 112 Bushing connecting member 1042 Limiting stopper connecting member 1121 Gasket 105 Cabin body 200 Connecting pin 106 Hatch 300 First cam member 107 Fixed cam 10 Hexagonal shaft 1071 Movable cam 11 DETAILED DESCRIPTION

[0050] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.

[0051] Referring to Figures 1-7 the drawings;

[0052] The hinge mechanism with variable damping of the present application comprises:

[0053] a fixed leaf 101 fixedly connected with a cabin body 200; and

[0054] a movable leaf 102 fixedly connected with a hatch 300;

[0055] a hinge shaft 103 connected with the movable leaf 102 through two connecting pins 106, two ends of the hinge shaft 103 being connected to the fixed leaf 101;

[0056] a bushing 104 installed at one end of the fixed leaf 101;

[0057] two gaskets 105 arranged at the joint of the fixed leaf 101 and the movable leaf 102;

[0058] a cam assembly installed at the end of the fixed leaf 101 away from the bushing 104, the cam assembly comprising, from bottom to top, a first cam piece 107, a second cam piece 108, a third cam piece 110 and a fourth cam piece 111, the first cam piece 107 and the fourth cam piece 111 being connected to the fixed leaf 101 respectively, two ends of the second cam piece 108 being inserted into the third cam piece 110 and the hinge shaft 103 respectively, the first cam piece 107 and the fourth cam piece 111 forming a fixed cam 10, and the second cam piece 108 and the third cam piece 110 forming a movable cam 11;

[0059] The hinge mechanism further comprises:

[0060] a plurality of disc springs 109 arranged in a straight-line combination between the second cam piece 108 and the third cam piece 110;

[0061] a stop block 112 fixedly connected to the fixed leaf 101.

[0062] As a further introduction of the embodiment, the fixed leaf 101 is provided with a first lug 1011 and a second lug 1012 at two ends matched with the movable leaf 102, the first lug 1011 is provided with a hexagonal slot 1013, and a first cam member 107 is installed on the first lug 1011 through the hexagonal slot 1013;

[0063] The first lug 1011 extends outwardly a cavity structure 1014, and the end of the cavity structure 1014 is provided with a first connecting lug 1015;

[0064] The fixed leaf 101 is provided with a plurality of fixed leaf connecting members 1016 for connecting the fixed leaf 101 and the cabin body 200.

[0065] As a further introduction of the embodiment, the movable leaf 102 is configured as a movable leaf cylindrical segment 1021 at the part matched with the fixed leaf 101, and two gaskets 105 are respectively arranged between the two ends of the movable leaf cylindrical segment 1021 and the first lug 1011 and the second lug 1012;

[0066] The movable leaf cylindrical segment 1021 is longitudinally provided with a second through hole 1022 matched with the hinge shaft 103;

[0067] The movable leaf cylindrical segment 1021 is transversely provided with two first pin holes 1023 for the connecting pin 106 to pass through;

[0068] The movable leaf 102 is provided with a plurality of movable leaf connecting members 1024 for connecting the movable leaf 102 and the hatch 300.

[0069] As a further introduction of the embodiment, one end of the hinge shaft 103 is longitudinally provided with a first square slot 1031, and one end of the second cam member 108 is inserted into the first square slot 1031;

[0070] The hinge shaft 103 is transversely provided with two second pin holes 1032 on the shaft body;

[0071] As a preferred technical solution of the embodiment, the two connecting pins 106 are cylindrical pins or conical pins, the two first pin holes 1023 and the two second pin holes 1032 are coaxial respectively, and the connecting pin 106 is connected with the first pin hole 1023 and the second pin hole 1032 in an interference fit, so as to fixedly connect the hinge shaft 103 and the movable leaf 102.

[0072] As a further introduction of the embodiment, the bushing 104 is provided with a third through hole 1041 in the middle for the hinge shaft 103 to pass through;

[0073] And the outer edge of the bushing 104 is provided with a plurality of bushing connectors 1042 for connecting the bushing 104 and the fixed leaf 101.

[0074] As a further introduction to this embodiment, the first cam member 107 is provided with a hexagonal shaft 1071, and the first cam member 107 is installed on the fixed leaf 101 through the cooperation of the hexagonal shaft 1071 and the hexagonal groove 1013.

[0075] The upper end surface of the first cam member 107 forms a first cam surface 1073, and the middle part of the first cam member 107 is provided with a first through hole 1072 for the hinge shaft 103 to pass through.

[0076] As a further introduction to this embodiment, the two ends of the second cam member 108 are respectively provided with a first square shaft 1081 and a second square shaft 1082, the first square shaft 1081 is inserted into the first square groove 1031, so that the second cam member 108 is connected with the hinge shaft 103.

[0077] The middle part of the second cam member 108 is provided with an annular boss 1083, the lower surface of the annular boss 1083 forms a second cam surface 1084, and the upper surface of the annular boss 1083 is a plane, and the bottom of the disc spring 109 is limited by the upper surface of the annular boss 1083.

[0078] As a further introduction to this embodiment, the third cam member 110 includes a cam top disc 1101 and a cam cylinder 1102, the upper surface of the cam top disc 1101 forms a third cam surface 1104, the lower surface of the cam top disc 1101 is a plane, the top of the disc spring 109 is limited by the lower surface of the cam top disc 1101, and the cam cylinder 1102 passes through the inner hole of the disc spring 109.

[0079] The third cam member 110 is provided with a second square groove 1103, and the second square shaft 1082 is inserted into the second square groove 1103, so that the third cam member 110 is connected with the second cam member 108.

[0080] As a further introduction to this embodiment, the top surface of the inner cavity of the fourth cam member 111 is a fourth cam surface 1111, and the end part of the fourth cam member 111 is provided with a second connecting lug 1112.

[0081] The second connecting lug 1112 is provided with a plurality of top cover connecting pieces 1113 for connecting the second connecting lug 1112 and the first connecting lug 1015, so that the fourth cam piece 111 and the cavity structure 1014 wrap the first cam piece 107, the second cam piece 108, the disc spring 109 and the third cam piece 110 connected in sequence.

[0082] As a further introduction of the embodiment, the limiting block 112 is provided with a plurality of limiting block connecting pieces 1121 for connecting the limiting block 112 and the fixed leaf 101.

[0083] As a preferred technical solution of the embodiment, the fixed leaf connecting piece 1016, the movable leaf connecting piece 1024, the bush connecting piece 1042, the top cover connecting piece 1113 and the limiting block connecting piece 1121 can be screws, rivets, welding bodies, etc., and the number thereof is preferably 4. In each drawing of the embodiment, the fixed leaf connecting piece 1016, the movable leaf connecting piece 1024 and the top cover connecting piece 1113 are all internal hexagonal cylindrical head screws, the bush connecting piece 1042 is a countersunk head screw, and the limiting block connecting piece 1121 is a countersunk head screw matched with a hexagonal nut.

[0084] As a preferred technical solution of the embodiment, the fixed leaf 101, the movable leaf 102 and the limiting block 112 are all provided with reinforcing ribs to improve the structural rigidity.

[0085] It should be noted that the first square shaft 1081 and the first square groove 1031 adopt clearance fit, and the second square shaft 1082 and the second square groove 1103 adopt clearance fit, so that the two pieces of square shaft and square groove fit can produce axial relative movement.

[0086] Further, the first cam surface 1073 and the second cam surface 1084 adopt surface type matching, and the third cam surface 1104 and the fourth cam surface 1111 adopt surface type matching. When the hatch 300 is opened, the movable leaf 102 rotates counterclockwise around the hinge shaft 103, and drives the hinge shaft 103 to rotate. The hinge shaft 103 drives the second cam 108 to rotate through the matching of the first square slot 1031 and the first square shaft 1081, and drives the third cam 110 to rotate through the matching of the second square shaft 1082 and the second square slot 1103. The first cam 107 remains stationary due to the matching of the hexagonal shaft 1071 and the hexagonal slot 1013, and the fourth cam 111 remains stationary due to the connection of the top cover connecting piece 1113. Therefore, the first cam 107 and the fourth cam 111 form a fixed cam 10, and the second cam 108 and the third cam 110 form a movable cam 11. The schematic view of the outer profile surface of two adjacent cams is shown in FIG. 8. As shown in the figure, the cam matching surface has initial gap a, cam climbing section b, flat section c, vertical step d, and the like. Figures 4 to 6 Figure 4 The middle e represents a limiting stopper limiting position.

[0087] In the specific embodiment of the present application, when the hatch 300 is in the closed state, the disc spring 109 is in a free state, the cam matching surface has no extrusion force and has an initial gap, and the hinge mechanism 100 has no damping torque within a certain angle range, so as to avoid the rebound effect of the damping torque on the astronaut in the moment of closing the hatch 300, which affects the matching of the hatch 300 and the cabin 200, and the initial gap enables the hinge mechanism 100 to adapt to certain assembly deviation, so as to avoid assembly stress. During the opening of the hatch 300, the climbing sections of the upper and lower cams begin to contact and match, at which time the movable cam 11 generates axial relative movement away from the fixed cam 10, i.e. the second cam 108 moves upward and the third cam 110 moves downward. The disc spring 109 located between the second cam 108 and the third cam 110 is continuously extruded to generate gradually increasing elastic force, and the two pairs of cam matching surfaces generate gradually increasing frictional resistance due to the extrusion force and the relative movement, which is embodied as gradually increasing damping torque in the hinge mechanism 100. Then, the flat sections of the upper and lower cams begin to contact and match, the compression amount of the disc spring 109 and the frictional resistance of the cam matching surface remain constant, and a stable and unchanging damping torque is generated in the hinge mechanism 100, which can prevent the hatch 300 from drifting in the weightless environment in space. Finally, the movable leaf 103 contacts the limiting stopper 112, and the hinge mechanism 100 cannot continue to rotate, and the hatch 300 is opened to the maximum angle.​

[0088] In the above embodiment, two pairs of cam surfaces are used. In other embodiments, only one pair of the cam surfaces can be used, and the other pair of cam surfaces is replaced by flat surfaces. During the opening of the hatch 300, one of the movable cams 11 moves relative to one of the fixed cams 10 to compress the disc spring 109. Frictional resistance is generated between the cam surfaces or between the flat surfaces. The hinge mechanism 100 can also have a regularly changing damping characteristic.

[0089] The foregoing merely illustrates some exemplary embodiments of the present application, no doubt numerous modifications can be made by those skilled in the art without departing from the spirit and scope of the present application. The above description is merely illustrative of the present application and should not be construed as limiting the scope of the present application.

Claims

1. A hinge mechanism with variable damping, characterized in that, The hinge mechanism comprises: a fixed leaf (101) fixedly connected with the cabin body (200); and a movable leaf (102) fixedly connected with the cabin door (300); a hinge shaft (103) connected with the movable leaf (102) through two connecting pins (106), two ends of the hinge shaft (103) being connected to the fixed leaf (101); a bushing (104) installed at one end of the fixed leaf (101); two washers (105) arranged at the joint of the fixed leaf (101) and the movable leaf (102); a cam assembly installed on the fixed leaf (101) away from the bushing (104), the cam assembly comprising, from bottom to top, a first cam piece (107), a second cam piece (108), a third cam piece (110), and a fourth cam piece (111), the first cam piece (107) and the fourth cam piece (111) being connected with the fixed leaf (101), respectively, the second cam piece (108) being inserted into the third cam piece (110) and the hinge shaft (103) at two ends, respectively, the first cam piece (107) and the fourth cam piece (111) forming a fixed cam (10), the second cam piece (108) and the third cam piece (110) forming a movable cam (11); the hinge mechanism further comprises: a plurality of disc springs (109) arranged in a straight-line combination between the second cam piece (108) and the third cam piece (110); a limiting stopper (112) fixedly connected to the fixed leaf (101).

2. A hinge mechanism with variable damping according to claim 1, characterized in that The fixed leaf (101) is provided with a first lug (1011) and a second lug (1012) at two ends matched with the movable leaf (102), respectively, the first lug (1011) being provided with a hexagonal groove (1013) for installing the first cam piece (107) on the first lug (1011) through the hexagonal groove (1013); the first lug (1011) extends outwardly to form a cavity structure (1014), and the end of the cavity structure (1014) is provided with a first connecting lug (1015); the fixed leaf (101) is provided with a plurality of fixed leaf connecting pieces (1016) for connecting the fixed leaf (101) with the cabin body (200).

3. A hinge mechanism with variable damping according to claim 1, characterized in that The movable leaf (102) is configured as a movable leaf cylindrical segment (1021) at the part matched with the fixed leaf (101), two washers (105) being arranged at two ends of the movable leaf cylindrical segment (1021) and the joint with the fixed leaf (101), respectively; the movable leaf cylindrical segment (1021) is longitudinally provided with a second through hole (1022) penetrating through and matched with the hinge shaft (103); the movable leaf cylindrical segment (1021) is transversely provided with two first pin holes (1023) for the connecting pins (106) to pass through. The movable leaf (102) is provided with a plurality of movable leaf connecting members (1024) for connecting the movable leaf (102) and the hatch door (300).

4. A hinge mechanism with variable damping according to claim 3, characterized in that One end of the hinge shaft (103) is longitudinally provided with a first square slot (1031), and one end of the second cam member (108) is inserted into the first square slot (1031); The hinge shaft (103) is transversely provided with two second pin holes (1032) on the shaft body, and the connecting pin (106) is respectively inserted through the first pin hole (1023) and the second pin hole (1032) to form an interference fit, so that the hinge shaft (103) is fixedly connected with the movable leaf (102).

5. A hinge mechanism with variable damping according to claim 2, characterized in that The middle part of the bushing (104) is provided with a third through hole (1041) for the hinge shaft (103) to pass through; And the outer edge of the bushing (104) is provided with a plurality of bushing connecting members (1042) for connecting the bushing (104) and the fixed leaf (101).

6. A hinge mechanism with variable damping according to claim 2, characterized in that The first cam member (107) is provided with a hexagonal shaft (1071), and the first cam member (107) is installed on the fixed leaf (101) through the cooperation of the hexagonal shaft (1071) and the hexagonal slot (1013); The upper end surface of the first cam member (107) forms a first cam surface (1073), and the middle part of the first cam member (107) is provided with a first through hole (1072) for the hinge shaft (103) to pass through.

7. A hinge mechanism with variable damping according to claim 4, characterized in that Both ends of the second cam member (108) are respectively provided with a first square shaft (1081) and a second square shaft (1082), the first square shaft (1081) is inserted into the first square slot (1031), so that the second cam member (108) is connected with the hinge shaft (103); The middle position of the second cam member (108) is provided with an annular boss (1083), the lower surface of the annular boss (1083) forms a second cam surface (1084), and the upper surface of the annular boss (1083) is a plane, and the bottom of the disc spring (109) is limited by the upper surface of the annular boss (1083).

8. A hinge mechanism with variable damping according to claim 7, characterized in that The third cam member (110) includes a cam top disc (1101) and a cam cylinder (1102), the upper surface of the cam top disc (1101) forms a third cam surface (1104), the lower surface of the cam top disc (1101) is a plane, the top of the disc spring (109) is limited by the lower surface of the cam top disc (1101), and the cam cylinder (1102) penetrates the inner hole of the disc spring (109); The middle part of the third cam member (110) is provided with a second square slot (1103), and the second square shaft (1082) is inserted into the second square slot (1103) to connect the third cam member (110) with the second cam member (108).

9. A hinge mechanism with variable damping according to claim 2, characterized in that, The top surface of the inner cavity of the fourth cam member (111) forms a fourth cam surface (1111), and the end part of the fourth cam member (111) is provided with a second connecting lug (1112). A plurality of top cover connecting pieces (1113) are arranged on the second connecting lug (1112) and used for connecting the second connecting lug (1112) and the first connecting lug (1015), so that the fourth cam piece (111) and the cavity structure (1014) wrap the first cam piece (107), the second cam piece (108), the disc spring (109) and the third cam piece (110) connected in sequence.

10. A hinge mechanism with variable damping according to claim 1, characterized in that, A plurality of limiting block connecting pieces (1121) are arranged on the limiting block (112) and used for connecting the limiting block (112) and the fixed lamella (101).

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