Rotating shaft self-priming structure

Abstract

The present invention discloses a self-attracting structure of a rotating shaft, comprising a first shaft and a second shaft which are rotatably installed on a connecting piece in parallel and at intervals, and a transmission member for realizing synchronous relative rotation of the first shaft and the second shaft, a first cam and a second cam which are sleeved on the first shaft and the second shaft, a first cam and a second cam curved surface are formed on an axial side wall of the connecting piece, a third cam curved surface and a fourth cam curved surface are respectively provided on the first and second cams, the first and third cam curved surfaces are in concave-convex matching contact, and the second and fourth cam curved surfaces are in concave-convex matching contact, the first and second torsion packs respectively provide axial elastic force to the first and second cams so that they are tightly pressed against the connecting piece, and when the first and second cam surfaces are in concave-convex facing contact with the third and fourth cam surfaces respectively, a cross negative angle is formed between the first and second fixed plates fixedly installed on the first and second shafts. The present invention enables the display screen of the laptop computer to maintain a stable closed state when the display screen and the host computer are closed, thereby avoiding the use of a magnetic attraction structure on the laptop computer.

Description

Technical Field

[0001] The invention relates to a linkage pivot, in particular to a rotating shaft self-attracting structure. Background Art

[0002] Common opening and closing structures, such as laptop computers, have a display screen and a main body that open and close via a hinge. However, the hinge structure of the laptop computer often causes an opening problem when the display screen and the main body are completely closed. Therefore, currently, a magnet structure is provided on the main body and display of the laptop computer so that the display screen and the main body are attracted together by magnetic force when in the closed state. This structure occupies space between the display screen and the main body. Summary of the Invention

[0003] In order to overcome the above-mentioned defects, the present invention provides a self-absorbing structure of a rotating shaft, which enables the display screen of the notebook computer and the host to maintain a stable closed state in the closed state, avoiding the use of a magnetic attraction structure.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a self-absorbing structure of a rotating shaft, including a first shaft, a second shaft, a transmission member, a connecting plate, a first torque pack, a second torque pack, a first fixed plate and a second fixed plate, the first fixed plate is fixedly installed at one end of the first shaft, the second fixed plate is fixedly installed at one end of the second shaft, the first shaft and the second shaft are respectively installed on the connecting plate so as to be able to stop in the axial direction and rotate in the circumferential direction, the first shaft and the second shaft are arranged in parallel and spaced apart, the transmission member can make the first shaft and the second shaft rotate synchronously in opposite directions, the first torque pack and the second torque pack are respectively sleeved on the outside of the first shaft and the second shaft, a first cam is provided on the first shaft so as to be stopped in the circumferential direction and able to slide in the axial direction, and a first cam is provided on the second shaft so as to be able to stop in the circumferential direction and able to slide in the axial direction A second cam is provided which is stopped in the circumferential direction and can slide in the axial direction, and a first cam curved surface and a second cam curved surface are formed on an axial side wall of the connecting piece, a third cam curved surface is provided at one axial end of the first cam, and a fourth cam curved surface is provided at one axial end of the second cam, the first cam curved surface is in concave-convex contact with the third cam curved surface, and the second cam curved surface is in concave-convex contact with the fourth cam curved surface, the first torque package provides an axial elastic force to the first cam so that it is tightly against the connecting piece, and the second torque package provides an axial elastic force to the second cam so that it is tightly against the connecting piece, and when the first cam surface and the second cam surface are respectively in concave-convex contact with the third cam surface and the fourth cam surface, a cross negative angle is formed between the first fixing plate and the second fixing plate.

[0005] As a further improvement of the present invention, the cross-section of the first shaft and the second shaft is a non-circular structure, and a non-circular hole is formed on the inner side of the first cam and the second cam. The first cam and the second cam are respectively sleeved on the outer side of the first shaft and the second shaft. There is a clearance fit between the non-circular holes of the first cam and the second cam and the outer circumferential surface of the first shaft and the second shaft. A first limiting gasket and a second limiting gasket are also provided. Non-circular holes are also formed on the inner sides of the first limiting gasket and the second limiting gasket. The first limiting gasket and the second limiting gasket are respectively sleeved on the outer side of the first shaft and the second shaft in a tight fit. The first limiting gasket and the second limiting gasket are respectively eccentrically provided with a first notch and a second notch. The first cam and the second cam are respectively eccentrically provided with a first axial protrusion structure and a second axial protrusion structure on the side away from the second connecting plate. The first axial protrusion structure and the second axial protrusion structure are respectively inserted into the first notch and the second notch in a one-to-one manner.

[0006] As a further improvement of the present invention, a first stop plate and a second stop plate are further provided. The first stop plate and the second stop plate are respectively stopped in the circumferential direction and can slide axially on the first shaft and the second shaft, and the first stop plate and the second stop plate are respectively connected to the connecting plate so as to be able to rotate at a set angle in the circumferential direction.

[0007] As a further improvement of the present invention, the first stop plate and the second stop plate are tightly attached to the other side wall of the connecting plate, a first radial protrusion is provided on the circumferential outer wall of the first stop plate, a second radial protrusion is provided on the circumferential outer wall of the second stop plate, and a first axial protrusion and a second axial protrusion are respectively provided on the other side wall of the connecting plate, the first axial protrusion stops on the two side walls of the first radial protrusion, and the second axial protrusion stops on the two side walls of the second radial protrusion.

[0008] As a further improvement of the present invention, the transmission member includes a first gear, a second gear and a third gear. The first gear and the second gear are respectively mounted on the first shaft and the second shaft with circumferential stop, the third gear is axially stop and is mounted on the connecting plate so as to be rotatable in the circumferential direction, the third gear is clamped between the first gear and the second gear and is respectively engaged with the first gear and the second gear for transmission, the first gear, the second gear and the third gear are all helical gears, the first gear is arranged parallel to the second gear and spaced apart, and the third gear is axially perpendicular to the first gear and the second gear.

[0009] As a further improvement of the present invention, the structure of the third gear that is axially stopped and circumferentially rotatable and installed on the connecting plate is as follows: the connecting plate includes a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are arranged in parallel and spaced apart, the first connecting plate and the second connecting plate are tightly clamped on both sides of the axial direction of the first gear and the second gear, and the first connecting plate and the second connecting plate are correspondingly provided with a first avoidance groove and a second avoidance groove, the circumferential outer walls on the two opposite sides of the third gear can be rotatably inserted into the first avoidance groove and the second avoidance groove, and the first avoidance groove and the second avoidance groove are stopped on the two end surfaces of the axial direction of the third gear along the two side walls of the axial direction of the third gear.

[0010] As a further improvement of the present invention, the structure of the third gear installed on the connecting plate, which is axially stopped and circumferentially rotatable, is as follows: bent baffles extending axially along the first axis and the second axis are formed on the two opposite side walls of the connecting plate, and the two bent baffles are arranged in parallel and spaced apart, and the two ends of the rotating shaft of the third gear are respectively hinged on the two bent baffles.

[0011] As a further improvement of the present invention, the third gear and the rotating shaft thereon are an integrally formed structure, the connecting piece includes a first connecting piece and a second connecting piece, the first connecting piece and the second connecting piece are arranged in parallel and spaced apart, the first connecting piece and the second connecting piece are tightly clamped on both sides of the axis of the first gear and the second gear, and bent baffles are formed on the opposite side walls of the first connecting piece and the second connecting piece, and the bent baffles on the first connecting piece and the second connecting piece are aligned and connected, and an open groove structure is provided on the opposite side walls of the first bent baffle and the second bent baffle, and the open groove structure on the first bent baffle and the second bent baffle can be spliced ​​into a through hole for the rotating shaft of the third gear to pass through.

[0012] As a further improvement of the present invention, the third gear is a hollow structure, and its rotating shaft is a pin that can be inserted into the third gear. The bent baffles on the two opposite side walls of the connecting piece are provided with through holes for the third gear hinge shaft to pass through, and the bent baffles on the two side walls of the connecting piece are stopped at the two axial end faces of the third gear.

[0013] As a further improvement of the present invention, the first torque package and the second torque package both include butterfly washers and anti-loosening washers, and a plurality of butterfly washers and anti-loosening washers are axially stacked and sleeved on the outside of the first shaft and the second shaft. The first shaft and the second shaft are respectively provided with a first radial protrusion structure and a second radial protrusion structure at one end, and the first shaft and the second shaft are respectively screwed with a first nut and a second nut at the other end. The connecting piece, the first gear and the first torque package are sandwiched between the first radial protrusion structure and the first nut, and the connecting piece, the second gear and the second torque package are sandwiched between the second radial protrusion structure and the second nut. The anti-loosening washer is circumferentially stopped and positioned with the first shaft and the second shaft, and the anti-loosening washer is in contact with the first nut and the second nut. A torque package shell is also provided, and the torque package shell is sleeved on the outside of the first torque package and the second torque package. A connecting hole is provided on the first connecting piece, and the connecting hole is fixedly connected to the torque package shell through a connecting piece.

[0014] The beneficial effects of the present invention are as follows: the present invention forms a negative angle between the display screen and the host when the first and second cam surfaces on the connecting plate and the first cam on the first shaft and the second cam on the second shaft are facing each other, thereby making the display screen of the laptop computer maintain a stable closed state with the host when closed, generating a tightly fitting holding force, avoiding the use of a magnetic structure on the laptop computer, simplifying the structure of the laptop computer, and also achieving the same rotation angle of the first shaft and the second shaft when the laptop computer is closed by limiting the relative rotation angle of the first stop gasket and the second stop gasket to the connecting plate, avoiding the first shaft and the second shaft from tilting, improving the process assembly yield, avoiding the tilting of the assembled whole machine, and improving product quality. Moreover, through the special third gear installation structure, the transmission mechanism of the first shaft and the second shaft is simplified, improving assembly convenience, and reducing assembly and manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A first exploded perspective view of the first structure of the present invention;

[0016] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0017] Figure 3 A second exploded perspective view of the first structure of the present invention;

[0018] Figure 4 for Figure 3 Enlarged view of middle part B;

[0019] Figure 5 This is a three-dimensional exploded view of the second structure of the present invention;

[0020] Figure 6 The first three-dimensional exploded view of the third structure of the present invention

[0021] Figure 7 for Figure 6 Enlarged view of middle C part;

[0022] Figure 8 This is a perspective exploded view of the fourth structure of the present invention;

[0023] Figure 9 This is an exploded view of the installation principle of the third gear of the fourth structure of the present invention;

[0024] Figure 10 This is a three-dimensional diagram of the installation principle of the third gear of the fourth structure of the present invention;

[0025] Figure 11 This is the principle diagram of the cam negative angle of the present invention;

[0026] Figure 12 It is the principle diagram of the cam in the prior art. DETAILED DESCRIPTION

[0027] Embodiment: A self-absorbing structure of a rotating shaft includes a first shaft 1, a second shaft 2, a transmission member, a connecting plate, a first torque pack 3, a second torque pack 4, a first fixed plate 5 and a second fixed plate 6, the first fixed plate 5 is fixedly installed on one end of the first shaft 1, the second fixed plate 6 is fixedly installed on one end of the second shaft 2, the first shaft 1 and the second shaft 2 are respectively installed on the connecting plate so as to be able to stop in the axial direction and rotate in the circumferential direction, the first shaft 1 and the second shaft 2 are arranged in parallel and spaced apart, the transmission member can make the first shaft 1 and the second shaft 2 rotate synchronously in opposite directions, the first torque pack 3 and the second torque pack 4 are respectively sleeved on the outside of the first shaft 1 and the second shaft 2, a first cam 7 is provided on the first shaft 1 for stopping in the circumferential direction and being able to slide in the axial direction, and a first cam 7 is provided on the second shaft 2 for stopping in the circumferential direction and being able to slide in the axial direction A second cam 8 is provided for sliding, and a first cam surface 9 and a second cam surface 10 are formed on an axial side wall of the connecting plate. A third cam surface 11 is provided at one axial end of the first cam 7, and a fourth cam surface 12 is provided at one axial end of the second cam 8. The first cam surface 9 is in concave-convex contact with the third cam surface 11, and the second cam surface 10 is in concave-convex contact with the fourth cam surface 12. The first torque package 3 provides an axial elastic force to the first cam 7 to make it tightly against the connecting plate, and the second torque package 4 provides an axial elastic force to the second cam 8 to make it tightly against the connecting plate. When the first cam 7 surface and the second cam 8 surface are respectively in concave-convex contact with the third cam surface and the fourth cam surface, a cross negative angle is formed between the first fixing plate 5 and the second fixing plate 6.

[0028] When in use, the first fixing piece 5 is fixedly installed on the display screen, and the second fixing piece 6 is fixedly installed on the host. The opening and closing of the display screen will drive the first axis 1 and the second axis 2 to rotate synchronously relative to each other. When the display screen is closed, the first fixing piece 5 and the second fixing piece 6 reach a parallel state. At this time, the first cam surface 9 and the third cam surface 11 have not yet completely reached the concave-convex facing position, and similarly, the second cam surface 10 and the fourth cam surface 12 have not yet completely reached the concave-convex facing position. The first cam 7 and the second cam 8 still have a tendency to continue to rotate in the closing direction, that is, the first fixing piece 5 and the second fixing piece 6 also drive the display screen and the host to continue to rotate to form a cross motion trend. Due to the display screen and the host surface Since the two are already flat, they cannot continue to rotate, and they will maintain a stable closed state under the action of this counter pressure, avoiding the problem of an opening between the display screen and the host due to the distance between the axis of the first axis 1 and the second axis 2 after the display screen and the host are closed. There is no need to use magnets for forced attraction. The first cam surface 9 and the second cam surface 10 can be concave at both ends, and the concave surfaces form an inclined transition at both ends along the rotation direction. The third cam surface 11 and the fourth cam surface 12 form convex surfaces accordingly. The convex surface shape is consistent with the concave surface shape, and can fit perfectly. On the contrary, the first cam surface 9 and the second cam surface 10 can be convex, and the third cam surface 11 and the fourth cam surface 12 can be concave.

[0029] The cross-section of the first shaft 1 and the second shaft 2 is a non-circular structure, and a non-circular hole is formed on the inner side of the first cam 7 and the second cam 8. The first cam 7 and the second cam 8 are respectively sleeved on the outer side of the first shaft 1 and the second shaft 2. The non-circular holes of the first cam 7 and the second cam 8 are clearance-fitted with the outer circumferential surfaces of the first shaft 1 and the second shaft 2. A first limiting gasket 13 and a second limiting gasket 14 are also provided. Non-circular holes are also formed on the inner sides of the first limiting gasket 13 and the second limiting gasket 14. The first limiting gasket 13 and the second limiting gasket 14 are respectively sleeved on the outer sides of the first shaft 1 and the second shaft 2 in a tight fit. The first limiting gasket 13 and the second limiting gasket 14 are respectively eccentrically provided with a first notch 15 and a second notch 16. The first cam 7 and the second cam 8 are respectively eccentrically provided with a first axial protrusion structure 17 and a second axial protrusion structure 18 on the side away from the second connecting piece 29. The first axial protrusion structure 17 and the second axial protrusion structure 18 are respectively inserted into the first notch 15 and the second notch 16 in a one-to-one correspondence. During assembly, the first cam 7 and the second cam 8 are unable to be completely stopped and connected with the first shaft 1 and the second shaft 2 in the circumferential direction due to their thick thickness. By arranging a first limiting gasket 13 and a second limiting gasket 14 with relatively thin thickness on the first shaft 1 and the second shaft 2, the first limiting gasket 13 and the second limiting gasket 14 are respectively tightly matched with the first shaft 1 and the second shaft 2, thereby achieving complete stopping and positioning of the first limiting gasket 13 and the second limiting gasket 14 in the circumferential direction with the first shaft 1 and the second shaft 2. Then, the first axial protrusion structure 17 on the first cam 7 is plugged into the first notch 15 of the first limiting gasket 13, and the second axial protrusion structure 18 on the second cam 8 is plugged into the second notch 16 of the second limiting gasket 14, thereby achieving the first cam 7 and the second shaft 2. The circumferential limitation of the two cams 8 enables them to achieve the effect of complete stopping and positioning with the first axis 1 and the second axis 2 in the circumferential direction, avoiding the first cam 7 and the second cam 8 from colliding with the circumferential outer surfaces of the first axis 1 and the second axis 2 when the first axis 1 and the second axis 2 rotate to the closed state of the display screen and the host, thereby achieving a silent effect. The first axial protrusion structure 17 and the second axial protrusion structure 18 can be one, two, three or more, evenly distributed on the first cam 7 and the second cam 8, and the corresponding first notch 15 and the second notch 16 can also be one, two, three or more, evenly distributed on the first limiting gasket 13 and the second limiting gasket 14, realizing multi-point positioning, uniform force, stability, and avoiding the first cam 7 and the second cam 8 from tilting.

[0030] A first stop plate 19 and a second stop plate 20 are also provided. The first stop plate 19 and the second stop plate 20 are respectively circumferentially stopped and axially slidably mounted on the first shaft 1 and the second shaft 2, and the first stop plate 19 and the second stop plate 20 are respectively connected to the connecting plate so as to be rotatable at a set angle in the circumferential direction. Due to processing errors of the transmission parts, transmission errors and other factors, the first axis 1 and the second axis 2 often cannot rotate completely synchronously, and a slight angle difference is likely to occur between the two, which can easily cause the first axis 1 and the second axis 2 to tilt, resulting in a non-parallel state. By setting the first stop plate 19 and the second stop plate 20, they form a rotation angle limit with the connecting plate. When the first axis 1 rotates to the closed angle with the first stop plate 19, the first stop plate 19 and the connecting plate can no longer continue to rotate relative to each other. At this time, the first axis 1 can no longer rotate toward the closing direction. Similarly, after the second axis 2 drives the second stop plate 20 to rotate to the closed angle, the second stop plate 20 and the connecting plate can no longer continue to rotate relative to each other. At this time, the second axis 2 can no longer rotate toward the closing direction. This structure prevents the first axis 1 and the second axis 2 from continuing to rotate when they rotate to the closed angle, so that they remain at this angle, thereby maintaining a stable closed state of the display screen and the host, while avoiding the tilting of the first axis 1 and the second axis 2 due to the asynchronous rotation angle when in the closed state.

[0031] The first stopper 19 and the second stopper 20 are closely attached to the other side wall of the connecting piece. A first radial protrusion 21 is provided on the circumferential outer wall of the first stopper 19, and a second radial protrusion 22 is provided on the circumferential outer wall of the second stopper 20. A first axial protrusion 23 and a second axial protrusion 24 are respectively provided on the other side wall of the connecting piece. The first axial protrusion 23 stops on the side walls of the first radial protrusion 21, and the second axial protrusion 24 stops on the side walls of the second radial protrusion 22. By mutually blocking the two protrusion structures, the first shaft 1 and the second shaft 2 automatically stop rotating and positioning when they rotate to the closed state. In addition, the first and second stopper pieces can be provided with arcuate slideways, and the first and second axial protrusions on the connecting piece slide within the arcuate slideways. When they slide to the closed state, they are blocked by the side walls of the slideways and cannot slide further. Alternatively, an arcuate slideway can be provided on the connecting piece, and axial protrusions can be provided on the first stopper 19 and the second stopper 20. Such equivalent replacement structures are easily conceivable by those skilled in the art based on this patent and fall within the scope of protection of this patent.

[0032] The transmission member includes a first gear 25, a second gear 26, and a third gear 27. The first gear 25 and the second gear 26 are respectively mounted on the first shaft 1 and the second shaft 2 with circumferential stoppage. The third gear 27 is mounted on the connecting plate with axial stoppage and circumferential rotation. The third gear 27 is sandwiched between the first gear 25 and the second gear 26 and meshes with the first gear 25 and the second gear 26 for transmission. The first gear 25, the second gear 26, and the third gear 27 are all helical gears. The first gear 25 and the second gear 26 are arranged parallel and spaced apart. The third gear 27 is axially perpendicular to the first gear 25 and the second gear 26. The three gears form a gear transmission mechanism to achieve synchronous relative rotation of the first shaft 1 and the second shaft 2. This structure occupies a small space and has high transmission accuracy. Other rotation methods are also possible.

[0033] The structure of the third gear 27 that is axially stopped and circumferentially rotatable and installed on the connecting plate is as follows: the connecting plate includes a first connecting plate 28 and a second connecting plate 29, the first connecting plate 28 and the second connecting plate 29 are arranged in parallel and spaced apart, the first connecting plate 28 and the second connecting plate 29 are tightly clamped on the axial sides of the first gear 25 and the second gear 26, and the first connecting plate 28 and the second connecting plate 29 are correspondingly provided with a first avoidance groove 30 and a second avoidance groove 31, and the circumferential outer walls on the two opposite sides of the third gear 27 can be rotatably inserted into the first avoidance groove 30 and the second avoidance groove 31, and the first avoidance groove 30 and the second avoidance groove 31 are stopped on the axial end surfaces of the third gear 27 along the axial side walls of the third gear 27. Two connecting plates are clamped at both ends of the first gear 25 and the second gear 26, and an avoidance groove is provided on them to accommodate the third gear 27, so as to realize axial limitation of the third gear 27. The third gear 27 is blocked on all sides by the first gear 25, the second gear 26, the first connecting plate 28 and the second connecting plate 29 to realize radial limitation, thereby realizing precise positioning of the third gear 27. The structure is simple, easy to assemble and takes up little space.

[0034] The third gear 27 is mounted on the connecting plate, axially secured but circumferentially rotatable, as follows: Two opposing sidewalls of the connecting plate are formed with bent baffles 32 extending axially along the first axis 1 and the second axis 2. The two bent baffles 32 are spaced parallel to each other, and the ends of the rotating shaft 33 of the third gear 27 are hingedly mounted on the two bent baffles 32. By providing the parallel, spaced bent baffles 32 on the connecting plate, the third gear 27 is hingedly positioned between the two bent baffles 32 via the rotating shaft 33, thereby ensuring the proper positioning of the third gear 27. This structural connecting plate is easy to manufacture and assemble, and is also convenient and time-saving.

[0035] The third gear 27 and the rotating shaft thereon are an integrally formed structure, and the connecting piece includes a first connecting piece 28 and a second connecting piece 29. The first connecting piece 28 and the second connecting piece 29 are arranged in parallel and spaced apart. The first connecting piece 28 and the second connecting piece 29 are tightly clamped on both axial sides of the first gear 25 and the second gear 26. A bent baffle 32 is formed on the opposite side walls of the first connecting piece 28 and the second connecting piece 29, and the bent baffles 32 on the first connecting piece 28 and the second connecting piece 29 are aligned and connected. An open groove structure 34 is provided on the opposite side walls of the first bent baffle 32 and the second bent baffle 32. The open groove structure 34 on the first bent baffle 32 and the second bent baffle 32 can be spliced ​​into a through hole for the rotating shaft of the third gear 27 to pass through.

[0036] The third gear 27 is a hollow structure, and its rotating shaft is a pin that can be inserted into the third gear 27. The bent blocking pieces 32 on the two opposite side walls of the connecting piece are provided with through holes 35 for the hinge shaft of the third gear 27 to pass through, and the bent blocking pieces 32 on the two side walls of the connecting piece are stopped on the two axial end surfaces of the third gear 27.

[0037] The first torque pack 3 and the second torque pack 4 both include a butterfly washer 36 and an anti-loosening washer 37. A plurality of butterfly washers 36 and anti-loosening washers 37 are axially stacked and sleeved on the outside of the first shaft 1 and the second shaft 2. One end of the first shaft 1 and the second shaft 2 is respectively provided with a first radial protrusion structure 38 and a second radial protrusion structure 39. The other ends of the first shaft 1 and the second shaft 2 are respectively screwed with a first nut 40 and a second nut 41. The connecting piece, the first gear 25 and the first torque pack 3 are clamped between the first radial protrusion structure 38 and the first nut 40. The connecting plate, second gear 26, and second torque pack 4 are sandwiched between the second radial protrusion 39 and the second nut 41. The anti-loosening washer 37 is circumferentially fixed to the first shaft 1 and the second shaft 2. The anti-loosening washer 37 contacts the first nut 40 and the second nut 41. A torque pack housing 42 is also provided. The torque pack housing 42 is sleeved on the outside of the first torque pack 3 and the second torque pack 4. The first connecting plate 28 is provided with a connecting hole 43, which is fixedly connected to the torque pack housing 42 via a connecting member. In this way, when the first shaft 1 and the second shaft 2 are rotated, the friction force generated by the relative rotation of the flat washer and the friction washer forms a rotational resistance. In addition, the first and second torque packs can also be other devices that provide torque, such as torsion springs or resistors.

Claims

1. A self-absorbing structure of a rotating shaft, comprising a first shaft (1), a second shaft (2), a transmission member, a connecting plate, a first torque package (3), a second torque package (4), a first fixed plate (5) and a second fixed plate (6), wherein the first fixed plate is fixedly mounted on one end of the first shaft, the second fixed plate is fixedly mounted on one end of the second shaft, the first shaft and the second shaft are respectively mounted on the connecting plate so as to be able to stop in the axial direction and rotate in the circumferential direction, the first shaft and the second shaft are arranged in parallel and spaced apart, the transmission member can make the first shaft and the second shaft rotate synchronously in opposite directions, the first torque package and the second torque package are respectively sleeved on the outside of the first shaft and the second shaft, and characterized in that: A first cam (7) is provided on the first shaft and is circumferentially stopped and axially slidable, and a second cam (8) is provided on the second shaft and is circumferentially stopped and axially slidable, a first cam curved surface (9) and a second cam curved surface (10) are formed on an axial side wall of the connecting piece, a third cam curved surface (11) is provided on an axial end of the first cam, and a fourth cam curved surface (12) is provided on an axial end of the second cam, the first cam curved surface is in concave-convex contact with the third cam curved surface, and the second cam curved surface is in concave-convex contact with the fourth cam curved surface, a first torque package provides an axial elastic force to the first cam so that it presses against the connecting piece, and a second torque package provides an axial elastic force to the second cam so that it presses against the connecting piece, and the first cam curved surface When the first and second cam surfaces are in direct contact with the third and fourth cam surfaces respectively, a cross negative angle is formed between the first fixing plate and the second fixing plate. When the first and second cam surfaces on the connecting plate are in direct contact with the first cam on the first shaft and the second cam on the second shaft, a negative angle is formed between the display screen and the host. This allows the display screen of the laptop computer to maintain a stable closed state when the display screen and the host are closed, generating a tightly fitting holding force. A first stop plate (19) and a second stop plate (20) are also provided. The first stop plate and the second stop plate are respectively circumferentially stopped and axially slidable on the first and second shafts, and the first stop plate and the second stop plate are respectively circumferentially rotatable with the connecting plate. The first shaft and the second shaft are connected at a set angle, and the first stop gasket and the second stop gasket are limited by the relative rotation angle between the connecting plate, so that the first shaft and the second shaft maintain the same rotation angle when the laptop is closed. The transmission member includes a first gear (25), a second gear (26) and a third gear (27). The first gear and the second gear are respectively sleeved on the first shaft and the second shaft in a circumferential direction. The third gear is axially stopped and can be rotated on the connecting plate in a circumferential direction. The third gear is sandwiched between the first gear and the second gear and is respectively meshed with the first gear and the second gear for transmission. The first gear, the second gear and the third gear are all helical gears. The first gear is arranged parallel to the second gear and spaced apart. The third gear is arranged on the connecting plate in an axial direction and can be rotated in the circumferential direction. The wheel is axially perpendicular to the first gear and the second gear, and the third gear is axially stopped and circumferentially rotatable and is installed on the connecting piece. The structure is as follows: the connecting piece includes a first connecting piece (28) and a second connecting piece (29), the first connecting piece and the second connecting piece are arranged in parallel and spaced apart, the first connecting piece and the second connecting piece are tightly clamped on both sides of the axial direction of the first gear and the second gear, the first connecting piece and the second connecting piece are correspondingly provided with a first avoidance groove (30) and a second avoidance groove (31), the circumferential outer walls of the two opposite sides of the third gear are just rotatably inserted into the first avoidance groove and the second avoidance groove, and the first avoidance groove and the second avoidance groove are stopped on the axial end faces of the third gear along the axial side walls of the third gear.

2. The self-locking structure of the rotating shaft according to claim 1, characterized in that: The cross section of the first shaft and the second shaft is a non-circular structure, a non-circular hole is formed on the inner side of the first cam and the second cam, the first cam and the second cam are respectively sleeved on the outer side of the first shaft and the second shaft, the non-circular holes of the first cam and the second cam are clearance-matched with the outer circumferential surface of the first shaft and the second shaft, a first limiting gasket (13) and a second limiting gasket (14) are also provided, a non-circular hole is also formed on the inner side of the first limiting gasket and the second limiting gasket, the first limiting gasket and the second limiting gasket are respectively sleeved on the outer side of the first shaft and the second shaft in a tight fit, the first limiting gasket and the second limiting gasket are respectively eccentrically provided with a first notch (15) and a second notch (16), the first cam and the second cam are respectively eccentrically provided with a first axial protrusion structure (17) and a second axial protrusion structure (18) on the side facing away from the second connecting plate, the first axial protrusion structure and the second axial protrusion structure are respectively inserted into the first notch and the second notch in a one-to-one correspondence.

3. The self-locking structure of the rotating shaft according to claim 1, characterized in that: The first stop plate and the second stop plate are tightly attached to the other side wall of the connecting plate, a first radial protrusion (21) is provided on the circumferential outer wall of the first stop plate, a second radial protrusion (22) is provided on the circumferential outer wall of the second stop plate, and a first axial protrusion (23) and a second axial protrusion (24) are respectively provided on the other side wall of the connecting plate, the first axial protrusion stops on the two side walls of the first radial protrusion, and the second axial protrusion stops on the two side walls of the second radial protrusion.

4. The self-locking structure of the rotating shaft according to claim 1, characterized in that: The structure of the third gear being axially stopped and circumferentially rotatable and mounted on the connecting plate is as follows: two opposite side walls of the connecting plate are formed with bent baffles (32) extending axially along the first axis and the second axis, the two bent baffles are arranged in parallel and spaced apart, and the two ends of the rotating shaft (33) of the third gear are respectively hinged on the two bent baffles.

5. The self-engaging structure of the rotating shaft according to claim 4, characterized in that: The third gear and the rotating shaft thereon are an integrally formed structure, the connecting piece includes a first connecting piece and a second connecting piece, the first connecting piece and the second connecting piece are arranged in parallel and spaced apart, the first connecting piece and the second connecting piece are tightly clamped on both sides of the axial direction of the first gear and the second gear, a bent baffle is formed on the two opposite side walls of the first connecting piece and the second connecting piece, and the bent baffles on the first connecting piece and the second connecting piece are aligned and connected, an open groove structure (34) is provided on the opposite side walls of the first bent baffle and the second bent baffle, and the open groove structures on the first bent baffle and the second bent baffle can be spliced ​​into a through hole for the rotating shaft of the third gear to pass through.

6. The self-engaging structure of the rotating shaft according to claim 4, characterized in that: The third gear is a hollow structure, and its rotating shaft is a pin that can be inserted into the third gear. The bent blocking pieces on the two opposite side walls of the connecting piece are provided with through holes (35) for the third gear hinge shaft to pass through, and the bent blocking pieces on the two side walls of the connecting piece are stopped on the two axial end faces of the third gear.

7. The self-locking structure of the rotating shaft according to claim 4, characterized in that: The first torque pack and the second torque pack both include a butterfly washer (36) and an anti-loosening washer (37), and a plurality of butterfly washers and anti-loosening washers are axially stacked and sleeved on the outside of the first shaft and the second shaft. One end of the first shaft and the second shaft is respectively provided with a first radial protrusion structure (38) and a second radial protrusion structure (39), and the other end of the first shaft and the second shaft is respectively screwed with a first nut (40) and a second nut (41), the connecting piece, the first gear and the first torque pack are sandwiched between the first radial protrusion structure and the first nut, the connecting piece, the second gear and the second torque pack are sandwiched between the second radial protrusion structure and the second nut, the anti-loosening washer is circumferentially stopped and positioned with the first shaft and the second shaft, the anti-loosening washer is in contact with the first nut and the second nut, and a torque pack shell (42) is also provided, the torque pack shell is sleeved on the outside of the first torque pack and the second torque pack, and a connecting hole (43) is provided on the first connecting piece, and the connecting hole is fixedly connected to the torque pack shell through a connecting piece.

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