Rotary adjusting mechanism and polarization device

Abstract

The embodiment relates to the technical field of rotation adjustment, and discloses a rotation adjustment mechanism and a polarization device, the rotation adjustment mechanism comprises a base, a mounting rack, a conversion assembly and a linear displacement assembly, and two supporting strips are arranged on the base at an interval; the mounting frame is rotatably arranged between the two supporting strips; the conversion assembly comprises a support, a rotating shaft, a first swing arm, a second swing arm, a first push rod and a second push rod, the support is fixed to the base, the rotating shaft is rotatably arranged on the support, the first swing arm and the second swing arm are connected to the rotating shaft in a sleeving mode and are arranged in a crossed mode, and one end of the first swing arm is connected with the end, close to the support, of the first push rod; one end of the second swing arm is connected with one end, close to the bracket, of the second push rod; the linear displacement assembly is used for driving the first push rod to linearly move. Linear displacement is ingeniously converted into angular displacement, the structure is compact, the size is small, the occupied space is small, and the problem that conversion from linear displacement to angular displacement cannot be achieved in different planes of the space is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of rotational adjustment, and particularly to a rotational adjustment mechanism and a polarization device. Background Art

[0002] Electron cyclotron resonance heating and electron cyclotron current drive (ECRH&ECCD) are important parts in the development of controllable nuclear fusion. They can not only help increase the plasma temperature, but also effectively perform non-inductive current drive. They are important means for physical requirements such as plasma current profile control and magnetohydrodynamic instability control. Among them, the incident angle and power of electron cyclotron microwaves are of great significance for the coupling of microwaves and plasma. Microwaves with different incident angles have different propagation trajectories in the plasma, which in turn affects the effective heating of the plasma. Therefore, it is required that the antenna system has extremely high adjustment accuracy and flexibility to ensure that energy can be effectively deposited in a specific area of the plasma, which is not only related to the heating efficiency, but also directly affects the stability of the plasma. However, the adjustment mechanisms currently used have a relatively complex structure, poor flexibility, and occupy a large space, and cannot achieve the conversion from linear displacement to angular displacement in a limited space. Summary of the Invention

[0003] The object of the present invention is to provide a rotational adjustment mechanism, aiming to solve the problem that the conversion from linear displacement to angular displacement cannot be achieved in a space skew plane.

[0004] In a first aspect, an embodiment of the present application provides a rotational adjustment mechanism having first, second, and third directions that intersect pairwise, including:

[0005] A base, on one surface of which in the first direction, two support bars are spaced and provided, and the support bars extend along the first direction;

[0006] A mounting frame, which is rotatably arranged between the two support bars, and the mounting frame has a mounting surface for mounting a polarization mirror;

[0007] A conversion assembly, which includes a bracket, a rotating shaft, a first swing arm, a second swing arm, a first push rod, and a second push rod. The bracket is fixed on the base and is on the same side as the support bars. The rotating shaft is rotatably arranged on the bracket. The first swing arm is sleeved on the rotating shaft along the second direction. The second swing arm is sleeved on the rotating shaft along the third direction and is arranged crosswise with the first swing arm. One end of the first swing arm is connected to one end of the first push rod close to the bracket. The second push rod is arranged along the first direction, and one end of the second swing arm is connected to one end of the second push rod close to the bracket, and the other end is connected to the mounting frame to drive the mounting frame to rotate when the second swing arm swings;

[0008] A linear displacement component, which is used to drive the first push rod to move linearly, so as to push the first swing arm to swing and drive the rotating shaft to rotate.

[0009] In one embodiment, an included angle is formed between the first swing arm and the second swing arm, and the range of the included angle is between 60° and 70°.

[0010] In one embodiment, a limiting plate is connected to one end of the bracket away from the base. A through hole is formed in the limiting plate, and a linear bearing is embedded in the through hole. One end of the second push rod away from the second swing arm penetrates through the linear bearing and is connected to the mounting frame.

[0011] In one embodiment, a connecting component is further included. The connecting component includes a first connecting frame, a second connecting frame and a connecting bar. The first connecting frame is fixed on the back of the mounting frame, and a first mounting position is formed by depression in the first connecting frame. The second connecting frame is fixed at one end of the second push rod close to the mounting frame, and a second mounting position is formed by depression in the second connecting frame. One end of the connecting bar extends into the first mounting position and is hinged to the first connecting frame, and the other end extends into the second mounting position and is hinged to the second connecting frame.

[0012] In one embodiment, the rotation adjustment mechanism satisfies at least one of the following:

[0013] (a) A first through hole for sleeving with the rotating shaft is formed in the middle of the first swing arm;

[0014] (b) A second through hole for sleeving with the rotating shaft is formed in the middle of the second swing arm;

[0015] (c) The lengths of the first swing arm and the second swing arm are the same.

[0016] In one embodiment, a connecting ear is further included. A first sliding groove is formed in the end of the first swing arm for connecting with the first push rod along the second direction. A first sliding rod is slidably connected in the first sliding groove. One end of the connecting ear is connected to the end of the first sliding rod extending out of the first sliding groove, and the other end is connected to the first push rod.

[0017] In one embodiment, a third connecting frame is further included. A second sliding groove is formed in the end of the second swing arm for connecting with the second push rod along the third direction. A second sliding rod is slidably connected in the second sliding groove. One end of the third connecting frame is connected to the end of the second sliding rod extending out of the second sliding groove, and the other end is connected to one end of the second push rod close to the bracket.

[0018] In one embodiment, the linear displacement assembly includes a linear drive member, a guide sleeve, and a docking member. The output shaft of the linear drive member is connected to one end of the first push rod away from the bracket through the docking member. The guide sleeve is disposed between the bracket and the docking member, and one end of the guide sleeve close to the docking member is connected to the docking member. The first push rod penetrates through the guide sleeve.

[0019] In one embodiment, the mounting bracket includes a load-bearing beam and a mounting plate. Connecting shafts are connected to both ends of the load-bearing beam. The connecting shafts are rotatably connected to one end of the support beam away from the base. The mounting plate is fixed on the load-bearing beam, and the surface of the mounting plate facing away from the load-bearing beam is the mounting surface.

[0020] In a second aspect, the present application further provides a polarization device, including a polarization mirror and the above-mentioned rotation adjustment mechanism. The polarization mirror is mounted on the mounting surface of the mounting bracket.

[0021] Compared with the prior art, the above technical solution provided by the embodiments of the present application has the beneficial effects that:

[0022] The second push rod is used to connect the second swing arm and the mounting bracket. The second swing arm is sleeved on the rotating shaft and is arranged crosswise with the first swing arm. Since the first swing arm is connected to the first push rod, when the linear displacement assembly drives the first push rod to perform a linear motion, the first swing arm is pushed to swing to drive the rotating shaft to rotate, so that the second swing arm follows to swing, thereby pushing the second push rod to perform a linear motion in the first direction, and further driving the mounting bracket to rotate. Thus, the linear displacement is ingeniously converted into an angular displacement, with a compact structure, small volume and less occupied space, solving the problem that the conversion from linear displacement to angular displacement cannot be achieved in a spatial skew plane. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of an embodiment of a polarization device according to the present application;

[0024] Figure 2 is a schematic structural diagram of a rotation adjustment mechanism according to the present application;

[0025] Figure 3 is a schematic structural diagram of a conversion assembly in a rotation adjustment mechanism according to the present application;

[0026] Figure 4 is a schematic structural diagram of a first swing arm and a second swing arm in a rotation adjustment mechanism according to the present application.

[0027] Reference numerals in the drawings:

[0028] 100, Rotation adjustment mechanism; 10, Base; 11, First surface; 12, Second surface; 20, Support bar; 20a, Fixed part; 30, Conversion component; 31, Bracket; 32, Rotating shaft; 33, First swing arm; 33a, First slideway; 33b, First perforation; 34, Second swing arm; 34a, Second slideway; 34b, Second perforation; 35, First push rod; 36, Second push rod; 37, Limit plate; 38, Linear bearing; 39, Connecting ear; 310, Third connecting frame; 311, First slide bar; 312, Second slide bar; 40, Linear displacement component; 41, Linear drive; 42, Docking part; 43, Guide sleeve; 50, Mounting frame; 51, Bearing beam; 52, Mounting plate; 60, Connecting component; 61, First connecting frame; 61a, First mounting position; 62, Second connecting frame; 62a, Second mounting position; 63, Connecting bar; X, First direction; Y, Second direction; Z, Third direction; C, Included angle.

[0029] 200, Polarizing mirror. Detailed implementation manners

[0030] For a clearer understanding of the technical features, objectives, and effects of the present invention, the detailed implementation manners of the present invention will now be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientation or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are based on the orientation or positional relationships shown in the accompanying drawings and are constructed and operated in a specific orientation. This is only for the convenience of describing the technical solution and does not indicate that the indicated device or element must have a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0031] The following will further describe in detail the specific implementation manners of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0032] Please refer to Figures 1 to 3 , the embodiment of the present application provides a rotation adjustment mechanism 100, which is applicable to converting linear displacement into angular displacement in another plane to solve the problem that the conversion of linear displacement into angular displacement cannot be realized in a space with different planes. Among them, the rotation adjustment mechanism 100 has a first direction X, a second direction Y, and a third direction Z that intersect pairwise. It should be noted that the first direction X, the second direction Y, and the third direction Z mentioned in this embodiment are all virtual for the convenience of describing the positional relationships of components. Specifically, reference can be made to Figure 1 , the first direction X refers to Figure 1 the X direction in Figure 2 , the second direction Y refers to Figure 1The Z direction in .

[0033] Specifically, the rotation adjustment mechanism 100 includes a base 10, a mounting frame 50, a conversion assembly 30, and a linear displacement assembly 40. Two support bars 20 are provided on a surface of the base 10 in a first direction X, and the support bars 20 extend along the first direction X. The mounting frame 50 is rotatably disposed between the two support bars 20, and the mounting frame 50 has a mounting surface for mounting the polarizer 200. The conversion assembly 30 includes a bracket 31, a rotating shaft 32, a first swing arm 33, a second swing arm 34, a first push rod 35 and a second push rod 36. The bracket 31 is fixed on the base 10 and is located on the same side as the support bar 20. The rotating shaft 32 is rotatably arranged on the bracket 31. The first swing arm 33 is sleeved on the rotating shaft 32 along the second direction Y. The second swing arm 34 is sleeved on the rotating shaft 32 along the third direction Z and is arranged crosswise with the first swing arm 33. One end of the first swing arm 33 is connected to one end of the first push rod 35 close to the bracket 31. The second push rod 36 is arranged along the first direction X. One end of the second swing arm 34 is connected to one end of the second push rod 36 close to the bracket 31, and the other end is connected to the mounting frame 50, so as to drive the mounting frame 50 to rotate when the second swing arm 34 swings. The linear displacement assembly 40 is used to drive the first push rod 35 to perform linear motion, so as to drive the first swing arm 33 to swing to drive the rotating shaft 32 to rotate.

[0034] In the rotation adjustment mechanism 100 of the present embodiment, the second push rod 36 is used to connect the second swing arm 34 with the mounting frame 50. The second swing arm 34 is sleeved on the rotating shaft 32 and is arranged crosswise with the first swing arm 33. Since the first swing arm 33 is connected to the first push rod 35, when the linear displacement component 40 drives the first push rod 35 to perform linear motion, the first swing arm 33 is pushed to swing to drive the rotating shaft 32 to rotate, so that the second swing arm 34 follows the swing to push the second push rod 36 to perform linear motion along the first direction X, thereby driving the mounting frame 50 to rotate, thereby cleverly converting the linear displacement into the angular displacement. The structure is compact, the volume is small, and the space occupied is small, which solves the problem that the linear displacement cannot be converted into the angular displacement in the spatial non-planar.

[0035] For the convenience of description, the opposite surfaces of the base 10 in the first direction X are defined as the first surface 11 and the second surface 12. Two support bars 20 and a bracket 31 are fixed on the first surface 11, and the second surface 12 is used to contact the placement surface to ensure that the base 10 does not move randomly during use, which may affect the accuracy of adjustment. In addition, one end of the support bar 20 close to the base 10 is bent to form a fixing portion 20a, and the fixing portion 20a is fixedly connected to the base 10 through fasteners (such as bolts, screws, etc.). Similarly, one end of the bracket 31 close to the base 10 is fixedly connected to the base 10 through fasteners. In this way, it can be ensured that the support bar 20 and the bracket 31 are firmly installed on the first surface 11, preventing movement during use and affecting the accuracy of adjustment.

[0036] Exemplarily, based on the cross arrangement of the first swing arm 33 and the second swing arm 34, it is to ensure that a fixed angle is formed between the first swing arm 33 and the second swing arm 34, so that when being driven to swing, the first swing arm 33 and the second swing arm 34 can swing at a fixed angle, and further, the angle adjustment of the polarizing mirror 200 can be realized. For example, if the angle formed between the first swing arm 33 and the second swing arm 34 is a variable angle, it will cause the angle between the first swing arm 33 and the second swing arm 34 to be unable to be confirmed when the first push rod 35 makes a linear displacement, and further, the angular displacement of the mounting bracket 50 cannot be obtained, resulting in the inability to realize the angle control of the polarizing mirror 200.

[0037] Please refer to Figure 2 and Figure 4 , specifically, an included angle C is formed between the first swing arm 33 and the second swing arm 34, and the range of the included angle C is between 60° and 70°. In this way, it can be ensured that the first swing arm 33 and the second swing arm 34 swing at a fixed angle, so that the angular displacement of the mounting bracket 50 can be obtained according to the linear displacement amount, thereby realizing the precise adjustment of the polarizing mirror 200. Here, it should be noted that the minimum value of the included angle C can be 60°, and the maximum value is 70°.

[0038] Exemplarily, the linear displacement assembly 40 is used to drive the first push rod 35 to perform a linear motion and play a role in providing power. For this purpose, the linear displacement assembly 40 can adopt the specific structure in the following embodiments, or it can be a power component in the prior art that can realize driving the first push rod 35 to perform a linear motion, and no limitation is made thereto.

[0039] During the swinging of the second swing arm 34, the second push rod 36 needs to move linearly to push the mounting bracket 50 to drive the polarization mirror 200 to rotate. If there is no restriction on the second push rod 36, the second push rod 36 will push obliquely, resulting in an error in the conversion of the linear displacement into the angular displacement, thus making the angle adjustment of the polarization mirror 200 inaccurate. Therefore, in one embodiment, a limiting plate 37 is connected to the end of the bracket 31 away from the base 10. A through hole is formed in the limiting plate 37, and a linear bearing 38 is embedded in the through hole. The end of the second push rod 36 away from the second swing arm 34 passes through the linear bearing 38 and is connected to the mounting bracket 50. That is to say, by providing a limiting plate 37 at the end of the bracket 31 away from the base 10 and embedding a linear bearing 38 in the limiting plate 37, the second push rod 36 is restricted by the linear bearing 38 to move only linearly in the first direction X and will not move obliquely, thereby ensuring that the linear displacement is accurately converted into the angular displacement.

[0040] In addition, the limiting plate 37 and the support bar 20 can be an integral part or a split part. That is to say, the limiting plate 37 and the support bar 20 can be formed by an integral forming process, or the limiting plate 37 and the support bar 20 form two separate structures, that is: after the limiting plate 37 and the support bar 20 are separately formed, they are then connected. However, specifically in this embodiment, the limiting plate 37 and the support bar 20 are integrally formed, so that the limiting plate 37 and the support bar 20 form an integral part, which can save the connection between the limiting plate 37 and the support bar 20 and ensure sufficient structural strength.

[0041] In one embodiment, a connection assembly 60 is further included. The connection assembly 60 includes a first connection frame 61, a second connection frame 62, and a connection bar 63. The first connection frame 61 is fixed to the back of the mounting bracket 50, and a first mounting position 61a is recessed in the first connection frame 61. The second connection frame 62 is fixed to the end of the second push rod 36 close to the mounting bracket 50, and a second mounting position 62a is recessed in the second connection frame 62. One end of the connection bar 63 extends into the first mounting position 61a and is hinged to the first connection frame 61, and the other end extends into the second mounting position 62a and is hinged to the second connection frame 62.

[0042] In practical applications, the second push rod 36 is hinged to the mounting bracket 50, that is: a first connecting bracket 61 is fixedly connected to the back surface of the mounting bracket 50, and a first mounting position 61a is recessed in the first connecting bracket 61. Then, a second connecting bracket 62 is connected to the end of the second push rod 36 close to the mounting bracket 50, and a second mounting position 62a is recessed in the second connecting bracket 62. Finally, both ends of the connecting bar 63 are respectively inserted into the first mounting position 61a and the second mounting position 62a for hinging, thereby realizing the connection between the mounting bracket 50 and the second push rod 36. The structure is simple, the disassembly and assembly are convenient, and it is convenient to replace the corresponding mounting bracket 50 according to polarizing mirrors 200 of different sizes subsequently.

[0043] In one embodiment, the rotation adjustment mechanism 100 satisfies at least one of the following: (a) a first through hole 33b for sleeving with the rotating shaft 32 is formed in the middle of the first swing arm 33; (b) a second through hole 34b for sleeving with the rotating shaft 32 is formed in the middle of the second swing arm 34; (c) the lengths of the first swing arm 33 and the second swing arm 34 are the same.

[0044] Exemplarily, since both the first swing arm 33 and the second swing arm 34 are sleeved on the rotating shaft 32, in practical applications, in order to accurately convert the linear displacement into the corresponding angular displacement to reduce the conversion error, in practical applications, it is necessary to ensure that the swinging amplitudes of the first swing arm 33 and the second swing arm 34 are the same. For this purpose, a first through hole 33b is formed in the middle of the first swing arm 33, and a second through hole 34b is formed in the middle of the second swing arm 34, so that the first swing arm 33 and the second swing arm 34 are respectively sleeved on the rotating shaft 32 through the first through hole 33b and the second through hole 34b. Since the first through hole 33b is located in the middle of the first swing arm 33, the second through hole 34b is located in the middle of the second swing arm 34, and the lengths of the first swing arm 33 and the second swing arm 34 are the same, so that the first swing arm 33 and the second swing arm 34 have the same swinging amplitude when swinging, thereby ensuring that the linear displacement is accurately converted into the angular displacement. Therefore, in this embodiment, the rotation adjustment mechanism 100 satisfies the above (a), (b), and (c) at the same time.

[0045] In one embodiment, a connecting ear 39 is further included. A first sliding groove 33a is formed in the end of the first swing arm 33 for connecting with the first push rod 35 along the second direction Y. A first sliding rod 311 is slidably connected in the first sliding groove 33a. One end of the connecting ear 39 is connected to the end of the first sliding rod 311 extending out of the first sliding groove 33a, and the other end is connected to the first push rod 35.

[0046] Exemplarily, a connecting ear 39 is installed at one end of the first push rod 35 close to the bracket 31, and a first slideway 33a is provided at one end of the first swing arm 33 for connecting with the first push rod 35. A first slide bar 311 is slidably arranged in the first slideway 33a. Then, one end of the connecting ear 39 is connected to the end of the first slide bar 311 extending outside the first slideway 33a, so that the connecting ear 39 can rotate relative to the first swing arm 33, thereby enabling the first push rod 35 to be connected to the linear drive assembly at different angles, with a wide range of applications. In addition, the connecting ear 39 is movably connected to the first swing arm 33 by the first slide bar 311 sliding in the first slideway 33a. When the linear displacement assembly 40 pushes the first push rod 35 to move linearly, the connecting ear 39 pulls the first slide bar 311 to slide in the first slideway 33a, achieving smooth movement while also enabling precise control of the position and angle.

[0047] In one embodiment, it further includes a third connecting frame 310. A second slideway 34a is provided along the third direction Z at one end of the second swing arm 34 for connecting with the second push rod 36. A second slide bar 312 is slidably connected in the second slideway 34a. One end of the third connecting frame 310 is connected to the end of the second slide bar 312 extending outside the second slideway 34a, and the other end is connected to one end of the second push rod 36 close to the bracket 31.

[0048] Exemplarily, the third connecting frame 310 is installed at one end of the second push rod 36 close to the bracket 31, and the second slideway 34a is provided at one end of the second swing arm 34 for connecting with the second push rod 36. The second slide bar 312 is slidably arranged in the second slideway 34a. Then, the other end of the third connecting frame 310 is connected to the end of the second slide bar 312 extending outside the second slideway 34a, so that the third connecting frame 310 can rotate relative to the second swing arm 34, thereby converting the displacement amount of the swing of the second swing arm 34 into the linear displacement amount of pushing the second push rod 36, thus achieving precise adjustment of the polarizing mirror 200. In addition, the third connecting frame 310 is movably connected to the second swing arm 34 by the second slide bar 312 sliding in the second slideway 34a. When the linear displacement assembly 40 pushes the first push rod 35 to move linearly, the second swing arm 34 is driven to swing. At this time, the second slide bar 312 slides relative to the second swing arm 34 in the first slideway 33a, thereby jacking up the second push rod 36 to move linearly, achieving smooth movement while also enabling precise control of the position and angle.

[0049] In one embodiment, the linear displacement assembly 40 includes a linear drive member 41, a guide sleeve 43, and a docking member 42. The output shaft of the linear drive member 41 is connected to one end of the first push rod 35 away from the bracket 31 through the docking member 42. The guide sleeve 43 is disposed between the bracket 31 and the docking member 42, and one end of the guide sleeve 43 close to the docking member 42 is connected to the docking member 42. The first push rod 35 passes through the guide sleeve 43. That is to say, the angle value according to the required conditions is converted into a linear displacement amount, and then the linear drive member 41 is used to drive the first push rod 35 to move linearly to the corresponding displacement amount, so as to realize the conversion of linear displacement into angular displacement. The setting of the guide sleeve 43 is to ensure that the first push rod 35 is driven to move in a straight line direction, which can effectively reduce the error in the process of converting linear displacement into angular displacement.

[0050] In addition, it should be noted that the linear drive member 41 can be a cylinder, or a power component in the prior art that can drive the first push rod 35 to move linearly, and this is not limited.

[0051] In one embodiment, the mounting bracket 50 includes a bearing beam 51 and a mounting plate 52. Connecting shafts are connected to both ends of the bearing beam 51. The connecting shafts are rotatably connected to one end of the support beam away from the base 10. The mounting plate 52 is fixed on the bearing beam 51, and the surface of the mounting plate 52 facing away from the bearing beam 51 is the mounting surface. In this way, the bearing beam 51 is rotatably connected to the support bars 20 through the connecting shafts at both ends of the bearing beam 51, so that the bearing beam 51 is rotatably disposed between the two support bars 20. Furthermore, when the second push rod 36 pushes the bearing beam 51 to rotate, the mounting plate 52 connected to the bearing beam 51 is driven to rotate, so as to realize the adjustment of the polarization mirror 200 mounted on the mounting surface to meet the different incident angle requirements of microwaves.

[0052] The embodiment of the present application also provides a polarization device, including a polarization mirror 200 and the above-mentioned rotation adjustment mechanism 100. The polarization mirror 200 is mounted on the mounting surface of the mounting bracket 50.

[0053] According to the polarization device of the embodiment of the present disclosure, the above-mentioned rotation adjustment mechanism 100 is used to adjust the polarization mirror 200, and the technical effects are the same as those of the above-mentioned rotation adjustment mechanism 100, and will not be elaborated here.

[0054] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A rotation adjustment mechanism having a first direction, a second direction and a third direction intersecting each other, characterized in that: include: A base, wherein two support bars are provided at intervals on a surface of the base in the first direction, and the support bars extend along the first direction; A mounting frame, which is rotatably disposed between the two support bars, and the mounting frame has a mounting surface for mounting a polarizing mirror; The conversion assembly comprises a bracket, a rotating shaft, a first swing arm, a second swing arm, a first push rod and a second push rod, the bracket is fixed to the base and is located on the same side as the support bar, the rotating shaft is rotatably arranged on the bracket, the first swing arm is sleeved on the rotating shaft along the second direction, the second swing arm is sleeved on the rotating shaft along the third direction and is arranged crosswise with the first swing arm, and one end of the first swing arm is connected to one end of the first push rod close to the bracket, the second push rod is arranged along the first direction, one end of the second swing arm is connected to one end of the second push rod close to the bracket, and the other end is connected to the mounting frame, so as to drive the mounting frame to rotate when the second swing arm swings; The linear displacement assembly is used to drive the first push rod to perform linear motion, so as to push the first swing arm to swing and drive the rotating shaft to rotate.

2. The rotation adjustment mechanism according to claim 1, characterized in that: An included angle is formed between the first swing arm and the second swing arm, and the range of the included angle is between 60° and 70°.

3. The rotation adjustment mechanism according to claim 1, characterized in that: One end of the bracket away from the base is connected to a limit plate, a through hole is formed on the limit plate, a linear bearing is embedded in the through hole, and one end of the second push rod away from the second swing arm passes through the linear bearing and is connected to the mounting frame.

4. The rotation adjustment mechanism according to claim 3, characterized in that: The invention also includes a connecting component, which includes a first connecting frame, a second connecting frame and a connecting strip. The first connecting frame is fixed to the back side of the mounting frame, and the first connecting frame is recessed to form a first mounting position. The second connecting frame is fixed to one end of the second push rod close to the mounting frame, and the second connecting frame is recessed to form a second mounting position. One end of the connecting strip extends into the first mounting position and is hinged to the first connecting frame, and the other end extends into the second mounting position and is hinged to the second connecting frame.

5. The rotation adjustment mechanism according to claim 1, characterized in that: The rotation adjustment mechanism satisfies at least one of the following: (a) A first through hole for sleeve connection with the rotating shaft is provided in the middle of the first swing arm; (b) a second through hole for sleeve connection with the rotating shaft is formed in the middle of the second swing arm; (c) The lengths of the first swing arm and the second swing arm are consistent.

6. The rotation adjustment mechanism according to claim 1, characterized in that: It also includes a connecting ear, and the first swing arm is used to open a first slide along the second direction at one end connected to the first push rod, and a first slide is slidably connected to the first slide. One end of the connecting ear is connected to the end of the first slide extending outside the first slide, and the other end is connected to the first push rod.

7. The rotation adjustment mechanism according to claim 1, characterized in that: It also includes a third connecting frame, and the second swing arm is used to have a second slideway opened at one end connected to the second push rod along the third direction, and a second slide rod is slidably connected in the second slideway. One end of the third connecting frame is connected to the end of the second slide rod extending out of the second slideway, and the other end is connected to one end of the second push rod close to the bracket.

8. The rotation adjustment mechanism according to claim 1, characterized in that: The linear displacement assembly includes a linear drive member, a guide sleeve and a docking member. The output shaft of the linear drive member is connected to the end of the first push rod away from the bracket through the docking member. The guide sleeve is arranged between the bracket and the docking member, and the end of the guide sleeve close to the docking member is connected to the docking member. The first push rod passes through the guide sleeve.

9. The rotation adjustment mechanism according to claim 1, characterized in that: The mounting frame includes a load-bearing beam and a mounting plate. Both ends of the load-bearing beam are connected with connecting shafts. The connecting shafts are rotatably connected to one end of the support beam away from the base. The mounting plate is fixed on the load-bearing beam, and the surface of the mounting plate away from the load-bearing beam is the mounting surface.

10. A polarization device, characterized in that: It comprises a polarizing mirror and the rotation adjustment mechanism as claimed in any one of claims 1 to 9, wherein the polarizing mirror is mounted on the mounting surface of the mounting frame.

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