Rotating device

Abstract

The utility model belongs to the technical field of rotating structures, and particularly relates to a rotating device which comprises two rotating shafts parallel to each other, transmission mechanisms connected with the two rotating shafts respectively and used for enabling the two rotating shafts to rotate synchronously, and self-locking mechanisms connected with the two rotating shafts respectively. The two groups of elastic components are respectively arranged on the two rotating shafts and are used for pressing the self-locking mechanism; the elastic assembly is located between the transmission mechanism and the self-locking mechanism. The elastic assembly on each rotating shaft comprises a locking nut arranged on the rotating shaft in a sleeving mode, and a gap is formed between each locking nut and the transmission mechanism. In other words, the locking nut does not make direct contact with the transmission structure, and when the locking nut is rotated to adjust the tightness of the elastic assembly to the self-locking mechanism, the locking nut cannot press the transmission mechanism at the same time, and therefore the running smoothness of the transmission mechanism is not affected; therefore, compared with the prior art, the transmission mechanism has the technical effects of smooth operation and convenience in use.

Description

Technical Field

[0001] The utility model relates to the technical field of rotating structures, and specifically refers to an extension product for a tablet computer, such as a rotating device on an external keyboard of a tablet computer for realizing relative rotation of two connected components. Background Art

[0002] The device currently used to achieve relative rotation of two components on the extension products of electronic products includes two parallel rotating shafts, such as an external keyboard for a tablet computer; two groups of elastic components respectively arranged on the two rotating shafts, a self-locking component connected to the two rotating shafts, and a transmission component. The elastic component here includes a columnar elastic member sleeved on the rotating shaft. When assembled, one end of the two columnar elastic members respectively presses against the two end portions of the locking component. The degree of pressure of the columnar elastic members on the self-locking component directly affects the self-locking force of the self-locking component; and the self-locking component is in direct contact with the transmission component. With this structure, when the elastic component presses the self-locking component, the transmission component is also pressed at the same time, that is, there is no gap between the self-locking component and the transmission component here, and the elastic component pushes the self-locking component to achieve self-locking while also pressing it. The transmission component is affected, thus affecting both the operation of the transmission component and the self-locking effect. The self-locking component currently used includes a concave wheel piece and two cam pieces. A self-locking groove is provided in one surface of each end portion of the concave wheel piece for realizing self-locking with the protrusions of the two cam pieces respectively. With this structure, in the initial state, that is, the protrusions are combined with the self-locking grooves to realize self-locking. When one of the rotating shafts is rotated, the other rotating shaft is driven by the transmission component to realize synchronous rotation. At this time, the two cam pieces rotate synchronously with the two rotating shafts relative to the two ends of the concave wheel piece. In the process of rotating 360 degrees, the two cam pieces return to their original positions (initial positions) and realize self-locking again. In this process, self-locking can only be achieved once, and self-locking cannot be achieved after rotating a certain angle, so it is inconvenient to use. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the present invention aims to provide a rotating device.

[0004] The technical solution is: a rotating device, including: two parallel rotating shafts, a transmission mechanism respectively connected to the two rotating shafts for keeping the two rotating shafts rotating synchronously, a self-locking mechanism respectively connected to the two rotating shafts, and two groups of elastic components respectively arranged on the two rotating shafts for pressing the self-locking mechanism; the elastic component is located between the transmission mechanism and the self-locking mechanism; the elastic component on each rotating shaft includes a locking nut sleeved on the rotating shaft, and there is a gap between each locking nut and the transmission mechanism.

[0005] Preferably, the self-locking mechanism includes two cam pieces respectively sleeved on the two rotating shafts, and concave wheel pieces respectively connected to the two rotating shafts at both ends; two groups of self-locking grooves are provided in one surface of each end of the concave wheel piece, and a protrusion corresponding to the two groups of self-locking grooves on one end of the concave wheel piece is provided on one surface of each cam piece; one of the cam pieces is self-locked with one end of the concave wheel piece in the initial state; in the process of rotating 360 degrees from the initial state, one of the cam pieces is self-locked twice with one end of the concave wheel piece.

[0006] Preferably, a first shaft through-hole is provided in each of the two ends of the concave wheel plate for two rotating shafts to pass through respectively; two sets of self-locking grooves provided in the surfaces of the two ends of the concave wheel plate are respectively located on both sides of the corresponding first shaft through-hole.

[0007] Preferably, each group of self-locking grooves includes an outer groove and an inner groove that are connected to each other; the protrusions include an outer protrusion and an inner protrusion that correspond to the outer groove and the inner groove respectively when self-locking; and both side surfaces of the outer protrusion and the inner protrusion are inclined surfaces.

[0008] Preferably, a second shaft through-hole is provided in the cam plate for the rotating shaft to pass through, and the outer protrusion and the inner protrusion are respectively located on both sides of the second shaft through-hole; the outer facade of the outer protrusion is flush with the outer circumferential surface of the cam plate, and the inner facade of the inner protrusion is flush with the inner wall of the second shaft through-hole.

[0009] Preferably, the two rotating shafts can rotate relative to the two ends of the concave wheel plate; the two cam plates are respectively linked to the two rotating shafts; the two sets of self-locking grooves in one surface of any end of the concave wheel plate are spaced at an angle of 180 degrees, and the outer protrusion and inner protrusion on the same cam plate are spaced at an angle of 180 degrees.

[0010] Preferably, the outer groove includes an outer bottom surface provided in one end surface of the concave wheel plate, and two outer inclined surfaces respectively provided on both sides of the outer bottom surface; the inner groove includes an inner bottom surface provided in one end surface of the concave wheel plate, and two inner inclined surfaces respectively provided on both sides of the outer bottom surface; the two outer inclined surfaces are staggered with the two inner inclined surfaces respectively.

[0011] Preferably, it also includes two first friction plates respectively sleeved on the two rotating shafts and a first connecting plate whose two ends are respectively connected to the two rotating shafts; one surface of the two first friction plates is respectively in contact with the other surface of the two end portions of the cam plate; one surface of the two end portions of the first connecting plate is respectively in contact with the other surface of the two first friction plates; it also includes two second friction plates respectively sleeved on the two rotating shafts and one surface of the second friction plates is respectively in contact with the other surface of the two cam plates.

[0012] Preferably, each group of elastic components also includes a columnar elastic member and a first gasket mounted on one of the rotating shafts; one end of the columnar elastic member abuts against the other surface of the second friction plate, and the other end abuts against the first gasket; the first gasket is located between the other end of the columnar elastic member and the locking nut.

[0013] Preferably, there is a gap between the transmission mechanism and the locking nut; the transmission mechanism includes two mounting plates whose ends are respectively connected perpendicularly to the two rotating shafts and are parallel to each other, two transmission shafts arranged between the two mounting plates and parallel to the two rotating shafts, two external gears respectively sleeved on the two rotating shafts and located between the two mounting plates, and two internal gears respectively sleeved on the two transmission shafts and meshing with each other; the two internal gears are respectively meshed with the external gears adjacent to them; there is a gap between the locking nut and a mounting plate adjacent to it; rotating the locking nut can adjust the tightness of the columnar elastic member; the two ends of the two transmission shafts are respectively connected to the two mounting plates.

[0014] Preferably, two second washers located outside another mounting plate away from the locking nut and abutting against the mounting plate and two fixing nuts respectively abutting against the two second washers are sleeved on the two rotating shafts.

[0015] Preferably, the rotating shaft is integrally formed by an axial section and a connecting section provided at one end of the axial section; a step surface is provided at the position where the axial section and the connecting section are connected, and the other surfaces of the two first friction plates are respectively in contact with the two step surfaces; each connecting section is provided with an adapter plate.

[0016] Technical effect: The two sets of elastic components of the rotating device of the utility model are located between the transmission mechanism and the self-locking mechanism. The elastic component on each rotating shaft includes a locking nut sleeved on the rotating shaft. There is a gap between each locking nut and the transmission mechanism, that is, the locking nut has no direct contact with the transmission structure. When the locking nut is rotated to adjust the tightness of the elastic component on the self-locking mechanism, the locking nut will not simultaneously press the transmission mechanism, thereby affecting the smoothness of the operation of the transmission mechanism; at the same time, two sets of self-locking grooves are respectively provided in one of the surfaces of the two end portions of the concave wheel piece of the self-locking mechanism, and correspondingly, protrusions corresponding to the self-locking grooves are provided on the two cam pieces; in the initial state, that is, the protrusion on each cam piece is combined with the self-locking groove at one end portion of the concave wheel piece to achieve self-locking. At this time, rotating one The rotating shaft, driven by the transmission mechanism, realizes synchronous rotation of the other rotating shaft. At this time, the two cam pieces rotate synchronously with the two ends of the two rotating shafts relative to the concave wheel pieces. After rotating a certain angle, such as each rotating 180 degrees, the protrusion on one of the cam pieces is combined with the self-locking groove at one end of the concave wheel piece again to realize self-locking. In the process from the initial state to the relative rotation of the two rotating shafts 360 degrees, self-locking is realized again, thereby realizing two self-locking in this process; in the self-locking process, the two rotating shafts will not rotate relative to each other without applying sufficient external force, so the components respectively connected to the two rotating shafts also remain stationary, so as to realize the use requirements; therefore, compared with the existing technology, the utility model has the technical effect of smooth operation of the transmission mechanism and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of the initial state of the embodiment of the utility model;

[0018] Figure 2 A three-dimensional diagram of an initial state of an embodiment of the present utility model;

[0019] Figure 3 A three-dimensional diagram showing the initial state of an embodiment of the present invention from another perspective;

[0020] Figure 4a This is a front view of the embodiment of the utility model when the two rotating shafts rotate 360 degrees relative to each other;

[0021] Figure 4b This is a three-dimensional diagram of the embodiment of the utility model when the two rotating shafts rotate 360 degrees relative to each other;

[0022] Figure 5 This is a three-dimensional diagram from another perspective when the two rotating shafts of the embodiment of the utility model rotate 360 degrees relative to each other;

[0023] Figure 6 An exploded view of an initial state of an embodiment of the present utility model;

[0024] Figure 7This is an exploded view from another perspective of the initial state of the embodiment of the present invention;

[0025] Figure 8 A three-dimensional diagram of a cam piece according to an embodiment of the present utility model;

[0026] Figure 9 This is a front view of the cam piece of an embodiment of the utility model;

[0027] Figure 10 This is a left side view of the cam piece according to an embodiment of the present utility model;

[0028] Figure 11 A three-dimensional diagram of a concave wheel according to an embodiment of the present invention;

[0029] Figure 12 This is a front view of the concave wheel piece of an embodiment of the present utility model;

[0030] Figure 13 This is a left side view of the concave wheel piece according to an embodiment of the present utility model;

[0031] Figure 14 This is a three-dimensional diagram of the embodiment of the utility model when the two rotating shafts are rotated 180 degrees relative to each other;

[0032] Figure 15 This is a schematic diagram of the combination of the outer protrusion and the outer groove in an embodiment of the present utility model;

[0033] Figure 16 This is a schematic diagram of the critical state before the outer protrusion and the outer groove are combined in an embodiment of the present utility model.

[0034] Figure markings: rotating shaft-1, shaft section-101, connecting section-102, step surface-103, transmission mechanism-2, mounting plate-201, transmission shaft-202, external gear-203, internal gear-204, self-locking mechanism-3, cam plate-301, external protrusion-301a, internal protrusion-301b, second shaft through-hole-301c, concave wheel plate-302, first shaft through-hole-302a, external groove-302b, external bottom surface-3021b, external inclined surface-3022b, internal groove-302c, internal bottom surface-3021c, internal inclined surface-3022c, elastic component-4, columnar elastic part-401, first gasket-402, locking nut-403, first friction plate-5, second friction plate-5a, first connecting plate-6, second gasket-7, fixing nut-8, adapter plate-9. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and implementation methods.

[0036] like Figure 1-Figure 7As shown, an embodiment of the present invention provides a rotating device, comprising: two parallel rotating shafts 1, a transmission mechanism 2 and a self-locking mechanism 3 respectively connected to the two rotating shafts for keeping the two rotating shafts rotating synchronously, and two sets of elastic components 4 respectively provided on the two rotating shafts 1 for pressing the self-locking mechanism; the elastic components are located between the transmission mechanism and the self-locking mechanism; the elastic components 4 on each rotating shaft 1 include a locking nut 403 sleeved on the rotating shaft, and each locking nut has a gap with the transmission mechanism 2. The elastic component 4 here is used to adjust the tightness of the self-locking mechanism 3 by rotating the locking nut 403, that is, the locking nut 403 has no direct contact with the transmission structure. When the locking nut is rotated to adjust the tightness of the elastic component 4 on the self-locking mechanism 3, the locking nut 403 will not simultaneously press the transmission mechanism 2, thereby affecting the smoothness of the transmission mechanism operation.

[0037] like Figure 1-Figure 7 As shown, the transmission mechanism 2 includes two mounting plates 201 whose ends are respectively connected perpendicularly to the two rotating shafts 1 and are parallel to each other, two transmission shafts 202 arranged between the two mounting plates and parallel to the two rotating shafts, two external gears 203 respectively sleeved on the two rotating shafts and located between the two mounting plates, and two internal gears 204 respectively sleeved on the two transmission shafts and meshing with each other; the two internal gears are respectively meshed with the external gears adjacent to them; there is a gap between the locking nut 403 and a mounting plate 201 adjacent to it.

[0038] Two second washers 7 located outside another mounting plate 201 away from the locking nut 403 and abutting against the mounting plate, and two fixing nuts 8 abutting against the two second washers are respectively sleeved on the two rotating shafts 1 .

[0039] like Figure 1-Figure 7 As shown, the self-locking mechanism 3 includes two cam pieces 301 respectively mounted on the two rotating shafts 1, and concave wheel pieces 302 connected to the two rotating shafts at both ends; two sets of self-locking grooves are provided on one surface of each end of the concave wheel piece, and a protrusion corresponding to the two sets of self-locking grooves on one end of the concave wheel piece is provided on one surface of each cam piece 301; one of the cam pieces 301 is self-locked with one end of the concave wheel piece in the initial state, and during the process of rotating 360 degrees, one of the cam pieces 301 and one end of the concave wheel piece are self-locked twice. Figure 1-Figure 3 As shown, it means that the two shafts are in the initial state, the two adapter plates 9 are parallel to each other, and the angle between them is 0 degrees; Figure 14As shown, the two shafts rotate 90 degrees in opposite directions, that is, one shaft 1 rotates 90 degrees clockwise / counterclockwise, and the other shaft 1 rotates 90 degrees counterclockwise / clockwise under the drive of the transmission mechanism 2. At this time, the two adapter plates 9 are located in the same plane, and the angle between them is 180 degrees. One of the cam plates 301 is not engaged with one end of the concave wheel plate, so it cannot be self-locking; Figure 4a-Figure 5 As shown, the two rotating shafts 1 continue to rotate 90 degrees in opposite directions, that is, one of the rotating shafts 1 rotates a total of 180 degrees in the clockwise / counterclockwise direction. Driven by the transmission mechanism 2, the other rotating shaft 1 rotates 180 degrees in the counterclockwise / clockwise direction. At this time, the angle formed by the two adapter plates 9 is 360 degrees, and the two cam pieces 301 are respectively combined with the two end portions of the concave wheel piece to achieve self-locking again; that is, in the process from the angle formed by the two adapter plates 9 being 0 degrees (initial state) to the angle formed by the two adapter plates 9 being 360 degrees, the two cam pieces 301 are respectively combined with the two end portions of the concave wheel piece 302 twice to achieve self-locking twice.

[0040] like Figure 11-13 As shown, each end of the concave wheel plate 302 is provided with a first shaft through-hole 302a, for each of the two rotating shafts 1 to pass through. Two sets of self-locking grooves are provided on the surfaces of the concave wheel plate at each end, one on either side of the corresponding first shaft through-hole. In this embodiment, the two sets of self-locking grooves are symmetrically arranged about the axis of the first shaft through-hole 302a, which can also be understood as being spaced 180 degrees apart. The first shaft through-hole 302a here is circular.

[0041] Obviously, in this embodiment, the two ends of the concave wheel plate 302 are respectively connected to the two rotating shafts 1. Therefore, the two rotating shafts 1 can rotate relative to the two ends of the concave wheel plate 302, but the concave wheel plate as a whole will not rotate, and only the two cam plates 301 can rotate synchronously with the two rotating shafts 1 respectively, that is, the cam plates rotate relative to the concave wheel plate; for those skilled in the art, the two cam plates can also be replaced by concave wheel plates, that is, their structure is changed, and self-locking grooves are set therein, and correspondingly, protrusions are set on the surfaces of the two ends of the original concave wheel plate to cooperate with the self-locking grooves, which can also achieve a self-locking effect.

[0042] like Figure 11-13 As shown, in this embodiment, each group of self-locking grooves includes an outer groove 302b and an inner groove 302c that are connected to each other; the protrusions include an outer protrusion 301a and an inner protrusion 301b that correspond to the outer groove 302b and the inner groove 302c respectively when self-locking; both side surfaces of the outer protrusion 301a and the inner protrusion 301b are inclined surfaces.

[0043] like Figures 8-10As shown, the cam plate 301 is provided with a second shaft through-hole 301c for the shaft 1 to pass through. The outer protrusion 301a and the inner protrusion 301b are located on either side of the second shaft through-hole. The outer surface of the outer protrusion is flush with the outer circumference of the cam plate 301, and the inner surface of the inner protrusion is flush with the inner wall of the second shaft through-hole 301c. The cross-section of the second shaft through-hole 301c is runway-shaped, and the portion of the shaft 1 inserted into the second shaft through-hole is flat, so as to achieve synchronous rotation of the shaft 1 and the cam plate 301. Figure 15 , which is a schematic diagram showing the combination of the outer protrusion 301a and the outer groove 302b.

[0044] With this structure, the two rotating shafts 1 can rotate relative to the ends of the concave wheel plate 302; the two cam plates 301 maintain a coordinated relationship with the two rotating shafts. In this embodiment, specifically, the two sets of self-locking grooves on one surface of either end of the concave wheel plate 302 are spaced 180 degrees apart. Correspondingly, the outer protrusions 301a and inner protrusions 301b on the same cam plate 301 are spaced 180 degrees apart.

[0045] like Figure 11-13 As shown, the outer groove 302b includes an outer bottom surface 3021b provided in one end surface of the concave wheel plate 302 and two outer inclined surfaces 3022b provided on both sides of the outer bottom surface; the inner groove 302c includes an inner bottom surface 3021c provided in one end surface of the concave wheel plate 302 and two inner inclined surfaces 3022c provided on both sides of the outer bottom surface; the two outer inclined surfaces are staggered with the two inner inclined surfaces respectively. The so-called staggered means that the two outer inclined surfaces are not directly connected to the two inner inclined surfaces 3022c, and the outer bottom surface 3021b is not completely aligned with the inner bottom surface 3021c. Here, both the outer groove 302b and the inner groove 302c are provided with inclined surfaces, and both sides of the outer protrusion 301a and the inner protrusion 301b are inclined surfaces, so that when in the self-locking state, the outer protrusion 301a is easily disengaged from the outer groove 302b and the inner protrusion 301b is easily disengaged from the inner groove 302c to avoid being stuck, and when in the non-self-locking state, the outer protrusion 301a enters the outer groove 302b and the inner protrusion 301b enters the inner groove 302c to achieve self-locking. Figure 16 As shown, in the non-self-locking state, the outer protrusion 301a is in a critical state relative to the outer groove 302b. At this time, the outer protrusion 301a and the outer groove 302b are not combined together, but in this state, under the extrusion of the elastic component 4, the outer protrusion 301a automatically enters the outer groove 302b and forms a self-locking stable state.

[0046] like Figures 8-10As shown, in this embodiment, the protrusion includes an outer protrusion 301a and an inner protrusion 301b. Therefore, in the self-locking state, the outer protrusion 301a and the inner protrusion 301b on one cam piece 301 are respectively combined with two groups of self-locking grooves in one end surface of the cam wheel piece 302. Specifically, the outer protrusion 301a is combined with the outer groove 302b of one group of self-locking grooves, and the inner protrusion 301b is combined with the inner groove 302c of the other group of self-locking grooves. Obviously, only one outer protrusion 301a or one inner protrusion 301b is provided, and correspondingly, only one outer groove 302b or inner groove 302c is provided in each group of self-locking grooves, so that the outer protrusion 301a or the inner protrusion 301b is respectively combined with the outer groove 302b or the inner groove 302c in the initial position, and after rotating a certain angle, the outer protrusion 301a or the inner protrusion 301b is correspondingly combined with the outer groove 302b or the inner groove 302c to achieve self-locking, which can also achieve the purpose of self-locking. However, it is obvious that the stability of self-locking when only one outer protrusion 301a or one inner protrusion 301b is provided is not as good as when both the outer protrusion 301a and the inner protrusion 301b are provided.

[0047] like Figure 1-Figure 7 As shown, the system further includes two first friction plates 5, each mounted on the two rotating shafts 1, and first connecting plates 6, each connected to the two rotating shafts 1 at both ends. One surface of each of the two first friction plates abuts the other surface of each end of the concave wheel plate 302. One surface of each end of the first connecting plate abuts the other surface of each of the two first friction plates 5. The system also includes two second friction plates 5a, each mounted on the two rotating shafts 1, with one surface of each of the second friction plates abutting the other surface of each of the two cam plates 301. The first and second friction plates 5a are used to distribute the friction between the cam plate 301 and the concave wheel plate 302.

[0048] Each group of elastic components 4 also includes a cylindrical elastic member 401 and a first gasket 402 mounted on one of the rotating shafts 1; one end of the cylindrical elastic member abuts against the other surface of the second friction plate 5a, and the other end of the cylindrical elastic member abuts against the first gasket; the first gasket 402 is located between the other end of the cylindrical elastic member 401 and the locking nut 403.

[0049] Rotating the locking nut 403 adjusts the tightness of the cylindrical elastic member 401. The two ends of the two transmission shafts 202 are connected to the two mounting plates 201, respectively. Specifically, by tightening or loosening the cylindrical elastic member 401 when rotating the locking nut 403, the pressure of the cam plate 301 against the concave wheel can be adjusted, thereby adjusting the self-locking force. Because there is a gap between the transmission mechanism 2 and the locking nut 403, meaning that the cylindrical elastic member 401 on the elastic assembly 4 does not directly contact the transmission mechanism 2, adjusting the pressure of the cam plate 301 against the concave wheel does not compress the transmission mechanism 2, thereby ensuring smooth rotation of the transmission mechanism's gears.

[0050] like Figure 1-Figure 7 As shown, the rotating shaft 1 is integrally formed from a core section 101 and a connecting section 102 disposed at one end of the core section. A stepped surface 103 is provided at the junction of the core section 101 and the connecting section 102, with the other surfaces of the two first friction plates 5 respectively abutting against the two stepped surfaces. An adapter plate 9 is provided on each connecting section 102. The adapter plates 9 are fixedly connected to external components, such as two relatively rotatable components on an external keyboard for a tablet computer.

[0051] like Figure 2 As shown, using the rotating device of the present invention, it is obvious that the locking nut 403 and the fixing nut 8 have different functions. The former is used to adjust the tightness of the columnar elastic member 401 of the elastic component 4 during rotation, thereby adjusting the self-locking force of the self-locking mechanism 3, while the latter is used to fasten the transmission mechanism 2 to the rotating shaft 1.

[0052] like Figure 1-Figure 7As shown, in the initial state, the protrusion on each cam piece 301 is combined with one of the sets of self-locking grooves at one end of the concave wheel piece to achieve self-locking. In this embodiment, specifically, the outer protrusion 301a and the inner protrusion 301b on one of the cam pieces 301 are respectively combined with the two sets of self-locking grooves in the surface of one end of the concave wheel piece 302, that is, the outer protrusion 301a is combined with the outer groove 302b of one set of self-locking grooves, and the inner protrusion 301b is combined with the inner groove 302c of the other set of self-locking grooves; when in use, one of the components connected to any one of the rotating shafts is rotated, and the self-locking grooves are locked. Driven by the transmission mechanism 2, the other rotating shaft 1 rotates synchronously. At this time, the two cam pieces 301 rotate synchronously with the two rotating shafts 1 relative to the two ends of the concave wheel piece 302. After each rotates a certain angle, for example, 180 degrees, the protrusion on each cam piece 301 reaches the other set of self-locking grooves at one end of the concave wheel piece 302 and engages to achieve self-locking. The specific self-locking method is that the outer protrusion 301a engages with the outer groove 302b of the other set of self-locking grooves in the initial state, and the inner protrusion 301b engages with the inner groove 302c of the one set of self-locking grooves in the initial state. That is, the self-locking positions of the outer protrusion 301a and the inner protrusion 301b of each cam plate 301 have been exchanged. For example, the two sets of self-locking grooves at each end of the cam plate 302 are respectively defined as self-locking groove A and self-locking groove B. Assuming that in the initial state, the outer protrusion 301a and the inner protrusion 301b of each cam plate 301 are respectively combined with the outer groove 302b of the self-locking groove A and the inner groove 302c of the self-locking groove B and self-locked. When self-locking again, the outer protrusion 301a and the inner protrusion 301b of the cam plate are respectively combined with the outer groove 302b of the self-locking groove B and the inner groove 302c of the self-locking groove A and self-locked. Self-locking, that is, the outer protrusion 301a and the inner protrusion 301b of each cam plate 301 are respectively exchanged with the self-locking positions of the two sets of self-locking grooves at each end of the cam plate 302; during the relative rotation of 360 degrees, self-locking is achieved again, thereby achieving two self-locking in this process; during the self-locking process, the two rotating shafts 1 will not rotate relative to each other without sufficient external force, so the components respectively connected to the two rotating shafts 1 also remain stationary, so as to meet the use requirements, such as requiring that the angle of one component relative to the other component remain unchanged, so achieving two self-locking is more convenient than achieving one self-locking.

[0053] In the above description, it should be noted that the terms "installed", "connected", "connected" and other corresponding terms 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 direct connection, an indirect connection through an intermediate medium, or the internal connection of two components; "provided in" should be understood as "installed in, set in", including fixed installation, movable installation and other installation methods.

[0054] Obviously, the embodiments described above are only some of the embodiments of the present invention, not all of them. The drawings provide preferred embodiments of the present invention, but do not limit the scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Any equivalent structure made by using the contents of the present invention specification and drawings, directly or indirectly applied in other related technical fields, is also within the scope of protection of the present invention patent.

Claims

1. A rotating device comprising: Two mutually parallel rotating shafts (1), a transmission mechanism (2) respectively connected to the two rotating shafts for keeping the two rotating shafts rotating synchronously, a self-locking mechanism (3) respectively connected to the two rotating shafts, and two groups of elastic components (4) respectively arranged on the two rotating shafts (1) for pressing the self-locking mechanism; it is characterized in that the elastic component is located between the transmission mechanism and the self-locking mechanism; the elastic component (4) on each rotating shaft (1) includes a locking nut (403) sleeved on the rotating shaft, and there is a gap between each locking nut and the transmission mechanism (2).

2. A rotating device according to claim 1, characterized in that: The self-locking mechanism (3) comprises two cam pieces (301) respectively sleeved on the two rotating shafts (1), and concave wheel pieces (302) respectively connected to the two rotating shafts at both ends; two groups of self-locking grooves are respectively provided in one surface of the two ends of the concave wheel piece, and a protrusion corresponding to the two groups of self-locking grooves on one end of the concave wheel piece is provided on one surface of each cam piece (301); one of the cam pieces (301) is self-locked with one end of the concave wheel piece in an initial state; and in the process of rotating 360 degrees from the initial state, one of the cam pieces (301) is self-locked twice with one end of the concave wheel piece.

3. A rotating device according to claim 2, characterized in that: A first shaft through-hole (302a) is provided in each of the two ends of the concave wheel plate (302) for respectively passing two rotating shafts (1); and two groups of self-locking grooves provided in the surfaces of the two ends of the concave wheel plate are respectively located on both sides of the corresponding first shaft through-hole.

4. A rotating device according to claim 3, characterized in that: Each group of self-locking grooves comprises an outer groove (302b) and an inner groove (302c) that are connected to each other; the protrusions comprise an outer protrusion (301a) and an inner protrusion (301b) that respectively correspond to the outer groove (302b) and the inner groove (302c) when self-locking; both side surfaces of the outer protrusion (301a) and the inner protrusion (301b) are inclined surfaces.

5. A rotating device according to claim 4, characterized in that: A second shaft through-hole (301c) for the rotating shaft (1) to pass through is provided in the cam plate (301), and the outer protrusion (301a) and the inner protrusion (301b) are respectively located on both sides of the second shaft through-hole; the outer surface of the outer protrusion is flush with the outer circumferential surface of the cam plate (301), and the inner surface of the inner protrusion is flush with the inner wall of the second shaft through-hole (301c).

6. A rotating device according to claim 4, characterized in that: The two rotating shafts (1) can rotate relative to the two ends of the concave wheel piece (302); the two cam pieces (301) respectively maintain linkage relative to the two rotating shafts; the two groups of self-locking grooves in one surface of any end of the concave wheel piece (302) are spaced at an angle of 180 degrees, and the outer protrusion (301a) and the inner protrusion (301b) on the same cam piece (301) are spaced at an angle of 180 degrees.

7. A rotating device according to claim 4, characterized in that: The outer groove (302b) comprises an outer bottom surface (3021b) provided in one end surface of the concave wheel plate (302), and two outer inclined surfaces (3022b) respectively provided on both sides of the outer bottom surface; the inner groove (302c) comprises an inner bottom surface (3021c) provided in one end surface of the concave wheel plate (302), and two inner inclined surfaces (3022c) respectively provided on both sides of the outer bottom surface; the two outer inclined surfaces are respectively staggered with the two inner inclined surfaces.

8. A rotating device according to claim 2, characterized in that: The invention also includes two first friction plates (5) respectively sleeved on the two rotating shafts (1) and a first connecting plate (6) whose two ends are respectively connected to the two rotating shafts (1); one surface of the two first friction plates is respectively in contact with the other surface of the two ends of the cam plate (302); one surface of the two ends of the first connecting plate is respectively in contact with the other surface of the two first friction plates (5); and two second friction plates (5a) respectively sleeved on the two rotating shafts (1) and one surface of the second friction plates is respectively in contact with the other surface of the two cam plates (301).

9. A rotating device according to claim 8, characterized in that: Each set of elastic components (4) also includes a columnar elastic member (401) and a first gasket (402) sleeved on one of the rotating shafts (1); one end of the columnar elastic member abuts against the other surface of the second friction plate (5a), and the other end abuts against the first gasket; the first gasket (402) is located between the other end of the columnar elastic member (401) and the locking nut (403).

10. A rotating device according to claim 1, characterized in that: The transmission mechanism (2) comprises two mounting plates (201) whose ends are respectively connected perpendicularly to the two rotating shafts (1) and are parallel to each other, two transmission shafts (202) arranged between the two mounting plates and parallel to the two rotating shafts, two external gears (203) respectively sleeved on the two rotating shafts and located between the two mounting plates, and two internal gears (204) respectively sleeved on the two transmission shafts and meshing with each other; the two internal gears respectively mesh with the external gears adjacent thereto; a gap is provided between the locking nut (403) and an adjacent mounting plate (201); rotating the locking nut (403) can adjust the tightness of the columnar elastic member (401); and the two ends of the two transmission shafts (202) are respectively connected to the two mounting plates (201).

11. A rotating device according to claim 10, characterized in that: Two second washers (7) located outside another mounting plate (201) away from the locking nut (403) and abutting against the mounting plate, and two fixing nuts (8) respectively abutting against the two second washers are also sleeved on the two rotating shafts (1).

12. A rotating device according to claim 8, characterized in that: The rotating shaft (1) is formed integrally by a core section (101) and a connecting section (102) provided at one end of the core section; a step surface (103) is provided at the position where the core section (101) and the connecting section (102) are connected, and the other surfaces of the two first friction plates (5) are respectively in contact with the two step surfaces; and each connecting section (102) is provided with an adapter plate (9).

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