Rotating mirror support, rotating mirror and laser radar

Abstract

The utility model provides a rotating mirror support, a rotating mirror and a laser radar, and relates to the technical field of laser radars. The rotating mirror support is provided with a containing cavity used for containing a motor, a plurality of axial positioning faces and a plurality of circumferential positioning faces are arranged in the containing cavity, the axial positioning faces are perpendicular to the circumferential positioning faces, the axial positioning faces are used for being attached to one end face of the motor respectively, and the circumferential positioning faces are used for being attached to the side face of the motor respectively. The motor can be effectively positioned, so that the high-precision requirement of the rotating mirror is ensured.

Description

Technical Field

[0001] This application relates to the technical field of lidar, and more particularly, to a rotating mirror bracket, a rotating mirror, and a lidar. Background Art

[0002] Lidar is a very important sensor in the field of autonomous driving. The rotating mirror is one of the important components on the lidar. By rotating the rotating mirror, the laser can be reflected in different directions.

[0003] The rotating mirror is driven by a motor to rotate the lens. The matching accuracy between the motor and the bracket directly affects the working accuracy of the lidar. The motor is usually connected and fixed to the bracket with screws. Considering the positioning error, the motor cannot be effectively positioned only by the screw installation method, and it is difficult to ensure the high-precision requirements of the rotating mirror. Summary of the Utility Model

[0004] The objectives of this application include, for example, providing a rotating mirror bracket, a rotating mirror, and a lidar that can effectively position the motor and thus ensure the high-precision requirements of the rotating mirror.

[0005] This application can be implemented as follows:

[0006] In a first aspect, this application provides a rotating mirror bracket. The rotating mirror bracket is provided with a receiving cavity for receiving a motor. A plurality of axial positioning surfaces and a plurality of circumferential positioning surfaces are provided in the receiving cavity. The axial positioning surfaces are perpendicular to the circumferential positioning surfaces. The plurality of axial positioning surfaces are respectively used for fitting with one end face of the motor, and the plurality of circumferential positioning surfaces are respectively used for fitting with the side face of the motor.

[0007] Optionally, a plurality of first positioning bosses are provided in the receiving cavity, and each first positioning boss is provided with the axial positioning surface.

[0008] Optionally, each first positioning boss is provided with a through hole for a screw to pass through along the central axis direction of the receiving cavity.

[0009] Optionally, the plurality of first positioning bosses are connected by reinforcing ribs.

[0010] Optionally, the plurality of axial positioning surfaces are evenly spaced around the central axis of the receiving cavity, and the plurality of circumferential positioning surfaces are evenly spaced around the central axis of the receiving cavity.

[0011] Optionally, the rotating mirror bracket is provided with a plurality of dispensing platforms, and each dispensing platform is provided with a dispensing hole.

[0012] Optionally, a plurality of second positioning bosses are provided on the outer side surface of the rotating mirror bracket, and the surfaces of the plurality of second positioning bosses facing away from the rotating mirror bracket are respectively used for fitting with the surface of the lens.

[0013] Optionally, a rubber blocking strip is provided on the outer side surface of the rotating mirror bracket, the second positioning boss is close to the rubber blocking strip, and / or the second positioning boss is close to the edge of the outer side surface of the rotating mirror bracket.

[0014] Optionally, in the direction perpendicular to the outer side surface of the rotating mirror bracket, the surface of the rubber blocking strip facing away from the rotating mirror bracket is lower than the surface of the second positioning boss facing away from the rotating mirror bracket.

[0015] Optionally, the plurality of second positioning bosses are symmetric about a plane passing through the central axis of the accommodation cavity and perpendicular to the outer side surface of the rotating mirror bracket.

[0016] Optionally, a code disk installation groove for installing a code disk is provided inside the rotating mirror bracket.

[0017] Optionally, a support frame is provided inside the rotating mirror bracket. A plurality of limiting blocks and a plurality of limiting strips are provided on the top surface of the support frame. The plurality of limiting blocks are arranged around the central axis of the accommodation cavity, the plurality of limiting strips are arranged around the central axis of the accommodation cavity, the diameter of the circle where the plurality of limiting blocks are located is smaller than the diameter of the circle where the plurality of limiting strips are located, and a code disk installation groove is formed between the top surface of the support frame, the limiting blocks and the limiting strips.

[0018] Optionally, the rotating mirror bracket is symmetric about a partial plane passing through the central axis of the accommodation cavity.

[0019] Optionally, a chamfer is provided at the top of each circumferential positioning surface.

[0020] In a second aspect, the present application further provides a rotating mirror, including a motor and the rotating mirror bracket as described above. The motor is disposed inside the accommodation cavity, and the plurality of axial positioning surfaces are respectively in contact with one end surface of the motor, and the plurality of circumferential positioning surfaces are respectively in contact with the side surface of the motor.

[0021] In a third aspect, the present application further provides a lidar, including the rotating mirror as described above.

[0022] The beneficial effects of the rotating mirror bracket, rotating mirror and lidar of the present application include, for example: In order to effectively position the motor, a rotating mirror bracket is designed. The rotating mirror bracket is provided with a receiving cavity for accommodating the motor. The receiving cavity is provided with a plurality of axial positioning surfaces and a plurality of circumferential positioning surfaces. The axial positioning surfaces are perpendicular to the circumferential positioning surfaces. The plurality of axial positioning surfaces are respectively used to fit with one end surface of the motor, and the plurality of circumferential positioning surfaces are respectively used to fit with the side surface of the motor. When installing the motor, the motor is installed in the receiving cavity. At this time, the plurality of axial positioning surfaces respectively fit with one end surface of the motor, axially positioning the motor, and the plurality of circumferential positioning surfaces respectively fit with the side surface of the motor, circumferentially positioning the motor, realizing the effective positioning of the motor, and also ensuring the high-precision requirements of the rotating mirror when the lens is installed on the rotating mirror bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0024] Figure 1 Schematic diagram of the first perspective of the rotating mirror bracket in the embodiment of the present application;

[0025] Figure 2 is Figure 1 an enlarged view of part A in;

[0026] Figure 3 Schematic diagram of the second perspective of the rotating mirror bracket in the embodiment of the present application;

[0027] Figure 4 Schematic diagram of the third perspective of the rotating mirror bracket in the embodiment of the present application;

[0028] Figure 5 Schematic diagram of the rotating mirror in the embodiment of the present application;

[0029] Figure 6 Cross-sectional view of the rotating mirror in the embodiment of the present application.

[0030] Icons: 10 - rotating mirror; 100 - rotating mirror bracket; 110 - bracket body; 111 - accommodation cavity; 112 - fixing plate; 113 - circumferential positioning surface; 120 - outer frame; 130 - first positioning boss; 131 - axial positioning surface; 132 - through hole; 140 - second positioning boss; 141 - lens mounting surface; 150 - rubber seal strip; 160 - dispensing platform; 161 - dispensing hole; 170 - encoder mounting groove; 180 - support frame; 181 - inner frame; 1811 - limiting strip; 182 - rib plate; 1821 - limiting block; 200 - motor; 300 - mounting bracket; 400 - lens. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts fall within the scope of protection of the present application.

[0033] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] In the description of the present application, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is usually placed during use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present application.

[0035] In addition, if terms such as "first", "second", etc. are only used for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0036] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0037] The inventors of the present application have found that in existing rotating mirrors, the motor is usually fixedly connected to the bracket by screws. Considering the positioning error, the motor cannot be effectively positioned only by the screw installation method, and it is difficult to ensure the high-precision requirements of the rotating mirror. The embodiments of the present application provide a rotating mirror bracket, which solves at least the above technical problems.

[0038] Please refer to Figures 1-4 , the rotating mirror bracket 100 provided by the embodiments of the present application is provided with a receiving cavity 111 for receiving the motor 200. A plurality of axial positioning surfaces 131 and a plurality of circumferential positioning surfaces 113 are provided in the receiving cavity 111. The axial positioning surfaces 131 are perpendicular to the circumferential positioning surfaces 113. The plurality of axial positioning surfaces 131 are respectively used to fit with one end surface of the motor 200, and the plurality of circumferential positioning surfaces 113 are respectively used to fit with the side surface of the motor 200.

[0039] The rotating mirror bracket 100 includes a bracket main body 110 and an outer frame 120. The bracket main body 110 is disposed inside the outer frame 120, and the bracket main body 110 and the outer frame 120 are connected by a reinforcing rib. The receiving cavity 111 is disposed in the bracket main body 110, and the outer side surface of the outer frame 120 is used for bonding the lens 400.

[0040] In this embodiment, the outer frame 120 is a square frame, and the outer frame 120 has four outer side surfaces, and the four outer side surfaces are respectively used for bonding a lens 400. It can be understood that in other embodiments, the outer frame 120 can also be a hexagonal frame or an octagonal frame. Correspondingly, the outer frame 120 has six outer side surfaces or eight outer side surfaces.

[0041] The circumferential positioning surface 113 is an arc surface, and the plurality of circumferential positioning surfaces 113 are on the same cylindrical surface. The motor 200 is cylindrical, and the side surface of the motor 200 matches the shape of the cylindrical surface where the plurality of circumferential positioning surfaces 113 are located. In other embodiments, the circumferential positioning surface 113 can also be other shapes, as long as the side surface of the motor 200 can be simultaneously fitted with the plurality of circumferential positioning surfaces 113.

[0042] When installing the motor 200, the motor 200 is installed in the receiving cavity 111 of the bracket main body 110. At this time, the plurality of axial positioning surfaces 131 are respectively fitted with one end surface of the motor 200, and the axial positioning of the motor 200 is performed. The plurality of circumferential positioning surfaces 113 are respectively fitted with the side surface of the motor 200, and the circumferential positioning of the motor 200 is performed, so that the axis of the motor 200 coincides with the central axis of the receiving cavity 111, realizing the effective positioning of the motor 200. When the lens 400 is bonded to the outer frame 120, the high-precision requirements of the rotating mirror 10 can also be ensured.

[0043] A chamfer is provided at the top of each circumferential positioning surface 113. During the installation of the motor 200, the chamfer design can guide the motor 200.

[0044] In this embodiment, a plurality of first positioning bosses 130 are provided in the accommodating cavity 111, and each first positioning boss 130 is provided with an axial positioning surface 131.

[0045] A fixing plate 112 is provided on the bracket body 110. In the central axis direction of the accommodating cavity 111, one end of the accommodating cavity 111 is open, the fixing plate 112 is provided at the other end of the accommodating cavity 111, and a plurality of first positioning bosses 130 are all provided on the fixing plate 112. The surface of the first positioning boss 130 facing away from the fixing plate 112 is the axial positioning surface 131.

[0046] In this embodiment, each first positioning boss 130 is provided with a through hole 132 for a screw to pass through along the central axis direction of the accommodating cavity 111.

[0047] The through hole 132 penetrates through the first positioning boss 130 and the fixing plate 112 along the central axis direction of the accommodating cavity 111. When installing the motor 200, one end face of the motor 200 is simultaneously attached to a plurality of axial positioning surfaces 131. At this time, after the screw passes through the through hole 132, it is threadedly connected to the threaded hole on the motor 200, thereby fixing the motor 200.

[0048] In this embodiment, a plurality of first positioning bosses 130 are connected by reinforcing ribs.

[0049] A plurality of first positioning bosses 130 are arranged around the central axis of the accommodating cavity 111. Along the circumferential direction of the accommodating cavity 111, adjacent first positioning bosses 130 are connected by reinforcing ribs, which can prevent the first positioning bosses 130 from deforming easily. Moreover, on the central axis of the accommodating cavity 111, the height of the reinforcing rib is lower than the height of the first positioning boss 130, so that the reinforcing rib does not affect the axial positioning of the motor 200 by the axial positioning surface 131.

[0050] Exemplarily, the number of the first positioning bosses 130 is four, and the four first positioning bosses 130 are arranged around the central axis of the accommodating cavity 111. It can be understood that the number of the first positioning bosses 130 can be determined according to the actual working conditions. For example, the number of the first positioning bosses 130 can also be six or eight.

[0051] In this embodiment, a plurality of axial positioning surfaces 131 are evenly spaced around the central axis of the accommodating cavity 111, and a plurality of circumferential positioning surfaces 113 are evenly spaced around the central axis of the accommodating cavity 111.

[0052] A plurality of axial positioning surfaces 131 and a plurality of circumferential positioning surfaces 113 are both arranged at uniform intervals around the central axis of the accommodation cavity 111. During the axial and circumferential positioning of the motor 200, the motor 200 can also be uniformly stressed.

[0053] A plurality of second positioning bosses 140 are arranged on the outer side surface of the rotating mirror bracket 100, and each second positioning boss 140 is provided with a lens mounting surface 141. The plurality of lens mounting surfaces 141 are used to respectively fit with the surfaces of the lenses 400.

[0054] In this embodiment, each outer side surface of the outer frame 120 is provided with three second positioning bosses 140. The lens mounting surfaces 141 of the three second positioning bosses 140 on a single outer side surface are fitted with the surface of the same lens 400 to position the lens 400.

[0055] Three second positioning bosses 140 are arranged on each outer side surface of the outer frame 120. The lens mounting surface 141 is the surface of the second positioning boss 140 facing away from the outer frame 120. The three lens mounting surfaces 141 of the three second positioning bosses 140 can uniquely determine the mounting plane of the lens 400, that is, the mounting plane of the lens 400 is determined with the fewest second positioning bosses 140, and the key factors to be controlled are the fewest, which is convenient for mold manufacturing and production. At the same time, the area of the lens mounting surface 141 of a single second positioning boss 140 is small. Compared with mounting the lens 400 on the entire outer side surface, the mold opening dimension accuracy and stability of a single second positioning boss 140 are better.

[0056] When installing the lens 400, the lens 400 is fitted with the lens mounting surface 141, and the lens 400 is bonded to the outer side surface of the outer frame 120 with glue. Among them, the space between the lens mounting surface 141 and the outer side surface of the outer frame 120 is the glue dispensing space.

[0057] In other embodiments, the number of the second positioning bosses 140 on each outer side surface of the outer frame 120 can also be more than three, and the lens mounting surfaces 141 of the more than three second positioning bosses 140 can also uniquely determine the mounting plane of the lens 400.

[0058] A glue blocking strip 150 is arranged on the outer side surface of the rotating mirror bracket 100. The second positioning boss 140 is close to the glue blocking strip 150, and / or the second positioning boss 140 is close to the edge of the outer side surface of the rotating mirror bracket 100.

[0059] In this embodiment, two rubber blocking strips 150 are arranged on each outer side surface of the outer frame 120. The two rubber blocking strips 150 are oppositely arranged along the horizontal direction at the edge of the outer side surface. The two second positioning bosses 140 are respectively close to the two rubber blocking strips 150, and the other second positioning boss 140 is located between the two second positioning bosses 140. The three second positioning bosses 140 are all close to the edge of the outer side surface, and the connection lines between the three second positioning bosses 140 form an isosceles triangle or an equilateral triangle.

[0060] In order to avoid other structures affecting the accuracy of the second positioning boss 140 and facilitate mold production, the distance between the second positioning boss 140 close to the rubber blocking strip 150 and the rubber blocking strip 150 is 1-2 mm, and the distance between the three second positioning bosses 140 and the edge of the outer side surface is 1-2 mm. When designing the mold, only by controlling the manufacturing accuracy of each second positioning boss 140 can the installation effect of the lens 400 be better guaranteed. Since the second positioning boss 140 protrudes from the outer side surface of the outer frame 120, only the position of the second positioning boss 140 needs to be adjusted during mold repair, which improves the production efficiency.

[0061] Since the second positioning bosses 140 are close to the edge of the outer side surface and the distance between the second positioning bosses 140 is large, through trigonometric calculation, it is known that when the height of the second positioning bosses 140 is determined, the larger the distance between the second positioning bosses 140, the smaller the inclination angle of the installation plane of the lens 400 uniquely determined by the three second positioning bosses 140.

[0062] In this embodiment, in the direction of the outer side surface of the vertical mirror rotation bracket 100, the surface of the rubber blocking strip 150 facing away from the mirror rotation bracket 100 is lower than the surface of the second positioning boss 140 facing away from the mirror rotation bracket 100.

[0063] The surface of the rubber blocking strip 150 facing away from the mirror rotation bracket 100 is lower than the surface of the second positioning boss 140 facing away from the mirror rotation bracket 100, that is, the protruding height of the rubber blocking strip 150 on the outer side surface is lower than the protruding height of the second positioning boss 140 on the outer side surface, so that the rubber blocking strip 150 does not easily affect the positioning of the lens 400 by the second positioning boss 140.

[0064] In this embodiment, the multiple second positioning bosses 140 are symmetric about a plane passing through the central axis of the accommodating cavity 111 and perpendicular to the outer side surface of the mirror rotation bracket 100.

[0065] It should be noted that the multiple second positioning bosses 140 on a single outer side surface of the outer frame 120 are symmetric about a plane passing through the central axis of the accommodating cavity 111 and perpendicular to this outer side surface. In an environment with high and low temperature changes, the deformations of the multiple second positioning bosses 140 are also symmetrically distributed, so that the influence of the deformation of the second positioning bosses 140 on the angle of the lens 400 is small.

[0066] The rotating mirror bracket 100 is symmetric about a partial plane passing through the central axis of the accommodating cavity 111, so that the thermal expansion and contraction deformation of the rotating mirror bracket 100 in high and low temperature environments is symmetrically distributed, with less influence on the angle of the lens 400, thereby ensuring that the rotating mirror 10 meets the working requirements at different temperatures.

[0067] In this embodiment, the rotating mirror bracket 100 is symmetric about a plane passing through the central axis of the accommodating cavity 111 and perpendicular to the outer side surface of any outer frame 120, and the rotating mirror bracket 100 is symmetric about a plane passing through the central axis of the accommodating cavity 111 and passing through the diagonal of the outer frame 120, so that the rotating mirror bracket 100 is a symmetric structure as a whole.

[0068] The rotating mirror bracket 100 is a plastic bracket with a lower mass than a metal bracket. At the same time, the rotating mirror bracket 100 is a symmetric structure as a whole, and the rotating mirror bracket 100 itself can reach a high dynamic balance performance level without additional counterweight blocks, which is beneficial to the smooth operation of the motor 200.

[0069] A plurality of dispensing platforms 160 are provided on the rotating mirror bracket 100, and dispensing holes 161 are provided on each dispensing platform 160.

[0070] In this embodiment, the number of dispensing platforms 160 is four, and the four dispensing platforms 160 are respectively located at the four corners of the outer frame 120. A single dispensing platform 160 is simultaneously connected to the bracket main body 110 and two adjacent inner side surfaces of the outer frame 120. The dispensing holes 161 are blind holes. If it is found in the test that the dynamic balance of the rotating mirror bracket 100 does not meet the standard, the mass distribution of the rotating mirror bracket 100 is changed by dispensing glue into one or more of the dispensing holes 161 until the dynamic balance of the rotating mirror bracket 100 meets the standard.

[0071] In other embodiments, the number of dispensing platforms 160 can also be six or eight, and the plurality of dispensing platforms 160 are evenly arranged along the edge of the outer frame 120. It can be understood that the number of dispensing platforms 160 can be determined according to the actual working conditions, as long as the dynamic balance of the rotating mirror bracket 100 can be achieved through the dispensing holes 161 on the dispensing platforms 160.

[0072] In addition, except for the above-mentioned positioning surface and mounting surface, the bracket main body 110 is designed with a hollow structure, so that the overall weight of the rotating mirror bracket 100 is minimized and the structural strength can be guaranteed.

[0073] A code disk installation groove 170 for installing a code disk is provided in the rotating mirror bracket 100. By installing the code disk in the code disk installation groove 170, the rotation angle of the rotating mirror bracket 100 can be read through the code disk when the rotating mirror bracket 100 rotates.

[0074] In this embodiment, a support frame 180 is provided inside the rotating mirror bracket 100. On the top surface of the support frame 180, there are a plurality of limit blocks 1821 and a plurality of limit strips 1811. The plurality of limit blocks 1821 are arranged around the central axis of the accommodating cavity 111, and the plurality of limit strips 1811 are arranged around the central axis of the accommodating cavity 111. The diameter of the circle where the plurality of limit blocks 1821 are located is smaller than the diameter of the circle where the plurality of limit strips 1811 are located. A code disk installation groove 170 is formed among the top surface of the support frame 180, the limit blocks 1821, and the limit strips 1811.

[0075] The support frame 180 is arranged inside the bracket main body 110. The support frame 180 includes an inner frame 181 and a plurality of rib plates 182 connected to the inner frame 181. The outer side surface of the inner frame 181 is connected to the inner side surface of the outer frame 120 through reinforcing ribs. The plurality of rib plates 182 are all connected to the inner side surface of the inner frame 181 and are arranged around the central axis of the accommodating cavity 111. The top surfaces of the plurality of rib plates 182 and the top surface of the inner frame 181 are coplanar to form the top surface of the support frame 180. A limit block 1821 protrudes from the top surface of each rib plate 182, and a limit strip 1811 protrudes from the top surface of the inner frame 181. An annular code disk installation groove 170 is formed between the plurality of limit blocks 1821 and the plurality of limit strips 1811. When assembling the code disk, the code disk is bonded into the code disk installation groove 170.

[0076] Please refer to Figure 5 、 Figure 6 An embodiment of the present application further provides a rotating mirror 10, which includes a motor 200 and the above-mentioned rotating mirror bracket 100. The motor 200 is arranged inside the accommodating cavity 111. A plurality of axial positioning surfaces 131 are respectively attached to one end surface of the motor 200, and a plurality of circumferential positioning surfaces 113 are respectively attached to the side surface of the motor 200.

[0077] To fix the motor 200, after a plurality of axial positioning surfaces 131 are respectively attached to one end surface of the motor 200 and a plurality of circumferential positioning surfaces 113 are respectively attached to the side surface of the motor 200, the screw passes through the through hole 132 of the first positioning boss 130 and the fixing plate 112 and is threadedly connected to the threaded hole on the motor 200. The output shaft of the motor 200 is fixed to an external mounting bracket 300. When the motor 200 starts, the main body of the motor 200 drives the entire rotating mirror bracket 100 to rotate.

[0078] In the central axis direction of the accommodation cavity 111, the height of the circumferential positioning surface 113 is much smaller than the height of the motor 200. On the one hand, multiple circumferential positioning surfaces 113 can ensure effective circumferential support and positioning of the motor 200. On the other hand, when designing the mold, the part of the bracket body 110 other than the circumferential positioning surface 113 can have a larger draft angle. The draft angle of the circumferential positioning surface 113 is less than 0.1°. This not only meets the requirement of part demolding in mold manufacturing and production but also ensures high circumferential positioning accuracy when the motor 200 is installed.

[0079] The rotating mirror 10 further includes four lenses 400. The four lenses 400 are respectively arranged on the four outer side surfaces of the outer frame 120. Each lens 400 is attached to the lens mounting surface 141 of the second positioning boss 140 on a single outer side surface to ensure that the inclination angle of the lens 400 is within a reasonable range. Then, the lens 400 is bonded to the outer side surface of the outer frame 120 by means of dispensing to complete the assembly of the lens 400.

[0080] It can be understood that the number of lenses 400 matches the number of outer side surfaces of the outer frame 120. For example, when the number of outer side surfaces of the outer frame 120 is six, the number of lenses 400 is also six. The number of lenses 400 is selected according to the number of outer side surfaces of the outer frame 120.

[0081] An embodiment of the present application also provides a lidar, which includes the above-mentioned rotating mirror 10.

[0082] The rotating mirror bracket 100, the rotating mirror 10 and the lidar provided by the embodiments of the present application at least include the following technical effects: The batch production cost of the rotating mirror bracket 100 is low, the batch production quality is stable, and the dimensional consistency is good; The hollow design makes the rotating mirror bracket 100 light in weight, with a small load on the motor 200 and reduced heat generation of the motor 200; The symmetric structural design of the rotating mirror bracket 100, while reserving a space for dynamic balance adjustment, has good dynamic balance performance; Positioning is carried out during the assembly of both the motor 200 and the lens 400, so that the assembly accuracy of the motor 200 and the lens 400 is high, improving production efficiency and the assembly quality is stable and reliable; The code disk and the lens 400 are both bonded to the rotating mirror bracket 100, and the assembly reference is concentrated on the rotating mirror bracket 100. By controlling the manufacturing accuracy of the rotating mirror bracket 100, the assembly effect can be ensured.

[0083] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A rotary mirror bracket, characterized in that, The rotating mirror bracket (100) is provided with a receiving cavity (111) for receiving the motor (200). A plurality of axial positioning surfaces (131) and a plurality of circumferential positioning surfaces (113) are arranged in the receiving cavity (111). The axial positioning surfaces (131) are perpendicular to the circumferential positioning surfaces (113). The plurality of axial positioning surfaces (131) are respectively used for fitting with one end face of the motor (200), and the plurality of circumferential positioning surfaces (113) are respectively used for fitting with the side face of the motor (200).

2. The rotating mirror bracket according to claim 1, characterized in that, A plurality of first positioning bosses (130) are arranged in the receiving cavity (111), and each first positioning boss (130) is provided with the axial positioning surface (131).

3. The rotating mirror bracket according to claim 2, wherein, Each first positioning boss (130) is provided with a through hole (132) for a screw to pass through along the central axis direction of the receiving cavity (111).

4. The rotating mirror bracket according to claim 2, wherein, The plurality of first positioning bosses (130) are connected by reinforcing ribs.

5. The rotating mirror bracket according to claim 1, characterized in that The plurality of axial positioning surfaces (131) are evenly spaced around the central axis of the receiving cavity (111), and the plurality of circumferential positioning surfaces (113) are evenly spaced around the central axis of the receiving cavity (111).

6. The rotating mirror bracket according to claim 1, wherein A plurality of dispensing platforms (160) are arranged on the rotating mirror bracket (100), and each dispensing platform (160) is provided with a dispensing hole (161).

7. The rotating mirror bracket according to claim 1, characterized in that, A plurality of second positioning bosses (140) are arranged on the outer side surface of the rotating mirror bracket (100), and the surfaces of the plurality of second positioning bosses (140) facing away from the rotating mirror bracket (100) are respectively used for fitting with the surface of the lens (400).

8. The rotating mirror bracket according to claim 7, wherein A glue blocking strip (150) is arranged on the outer side surface of the rotating mirror bracket (100), the second positioning boss (140) is close to the glue blocking strip (150), and / or the second positioning boss (140) is close to the edge of the outer side surface of the rotating mirror bracket (100).

9. The rotating mirror bracket according to claim 8, wherein, In the direction perpendicular to the outer side surface of the rotating mirror bracket (100), the surface of the glue blocking strip (150) facing away from the rotating mirror bracket (100) is lower than the surface of the second positioning boss (140) facing away from the rotating mirror bracket (100).

10. The rotating mirror bracket according to claim 7, characterized in that, The plurality of second positioning bosses (140) are symmetric about a plane passing through the central axis of the receiving cavity (111) and perpendicular to the outer side surface of the rotating mirror bracket (100).

11. The rotating mirror bracket according to claim 1, wherein, A code disk mounting groove (170) for mounting a code disk is arranged in the rotating mirror bracket (100).

12. The rotating mirror bracket according to claim 11, characterized in that, A support frame (180) is disposed inside the rotating mirror support (100). A plurality of limiting blocks (1821) and a plurality of limiting strips (1811) are disposed on the top surface of the support frame (180). The plurality of limiting blocks (1821) are arranged around the central axis of the accommodation cavity (111), and the plurality of limiting strips (1811) are arranged around the central axis of the accommodation cavity (111). The diameter of the circle where the plurality of limiting blocks (1821) are located is smaller than the diameter of the circle where the plurality of limiting strips (1811) are located. A code disk mounting groove (170) is formed between the top surface of the support frame (180), the limiting blocks (1821), and the limiting strips (1811).

13. The rotating mirror bracket according to claim 1, characterized in that, The rotating mirror support (100) is symmetric about a partial plane passing through the central axis of the accommodation cavity (111).

14. The rotating mirror bracket according to claim 1, wherein, A chamfer is provided at the top of each circumferential positioning surface (113).

15. A rotating mirror, characterized in that, It includes a motor (200) and the rotating mirror support (100) according to any one of claims 1-14. The motor (200) is disposed inside the accommodation cavity (111). One end surface of the motor (200) is respectively attached to the plurality of axial positioning surfaces (131), and the side surface of the motor (200) is respectively attached to the plurality of circumferential positioning surfaces (113).

16. A lidar, characterized in that, It includes the rotating mirror (10) according to claim 15.

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