Shading assembly, assembling method thereof, laser radar and assembling jig

Abstract

The invention provides a shading assembly and an assembling method thereof, a laser radar and an assembling jig, the shading assembly comprises a support and at least one second shading piece, the support comprises a first shading piece and two connecting plates oppositely arranged in the first direction, and the two ends of the first shading piece are fixedly connected with the two connecting plates respectively; each connecting plate is provided with at least one connecting position; each second anti-dazzling screen corresponds to one connecting position on the connecting plate, the two ends of each second anti-dazzling screen are assembled and connected with the corresponding connecting positions on the two connecting plates respectively, the first anti-dazzling screens and the second anti-dazzling screens are parallel to each other and arranged at intervals in the second direction, and the second direction is perpendicular to the first direction and parallel to the thickness direction of the first anti-dazzling screens. According to the shading assembly, the installation precision requirement of the shading assembly can be met, and the installation space occupied by structural parts can be saved to the maximum extent.

Description

Technical Field

[0001] The present invention relates to the field of laser technology, and in particular, to a light-shielding component, an assembly method thereof, a lidar, and an assembly jig. Background Art

[0002] A lidar is a device that measures parameters such as the distance and speed of a target object by sending laser light to the surface of the object and then measuring the arrival time of the reflected light beam. It is widely used in scenarios such as autonomous driving. The basic working principle of a lidar is as follows: The light emitted by the laser source is emitted in a specified direction to the surface of the target object. After the light is reflected by the surface of the target object, it forms a return light wave. The return light wave enters the lidar and is received by the receiving device. Then, the return light wave is analyzed to calculate parameters such as the distance and speed relative to the target object. In the actual process of laser signal transmission and reception, the return light wave cannot completely enter the lidar along the preset return wave direction. The return light wave deviating from the preset return wave direction will form stray light, which affects the detection accuracy.

[0003] In order to reduce the stray light received by the receiving device, in some related technologies, the lidar is also provided with a light-shielding component. The light-shielding component has a plurality of light-shielding sheets arranged at intervals in a direction perpendicular to the preset return wave direction. Each light-shielding sheet is fixedly installed on a structural member (for example, a boss). The light-shielding sheet is arranged in a direction parallel to the preset return wave direction, and the light-shielding sheet can block the return light wave in a non-preset return wave direction. In this way, although the installation accuracy of the light-shielding component can be ensured, the structural member will occupy a large installation space inside the housing of the lidar.

[0004] Therefore, for the design of the structural member for installing and positioning the light-shielding sheet, how to meet the installation accuracy requirements of the light-shielding component and at the same time save the occupation of the installation space by it to the greatest extent is a difficult problem to be solved urgently. Summary of the Invention

[0005] The present invention provides a light-shielding component, an assembly method thereof, a lidar, and an assembly jig, which can not only meet the installation accuracy requirements of the light-shielding component, but also save the occupation of the installation space by the structural member for installing and positioning the light-shielding sheet to the greatest extent.

[0006] In a first aspect, the present invention provides a light shielding component for a lidar, comprising: a bracket and at least one second light shielding sheet. The bracket includes a first light shielding sheet and two connecting plates oppositely arranged along a first direction. Both ends of the first light shielding sheet are fixedly connected to the two connecting plates respectively, and at least one connecting position is provided on each connecting plate; each second light shielding sheet corresponds to a connecting position on the connecting plate, and both ends of the second light shielding sheet are assembled and connected to the corresponding connecting positions on the two connecting plates respectively. The first light shielding sheet and all the second light shielding sheets are parallel to each other and spaced apart along a second direction. The second direction is perpendicular to the first direction and parallel to the thickness direction of the first light shielding sheet.

[0007] In one implementation of the first aspect, the first light shielding sheet and the two connecting plates are integrally formed.

[0008] In one implementation of the first aspect, the connecting position includes a slot extending along a third direction. Both ends of the second light shielding sheet are respectively inserted and connected to the corresponding slots on the two connecting plates; wherein, the third direction is perpendicular to the first direction and the second direction.

[0009] In one implementation of the first aspect, the opening of the slot penetrates one end face of the corresponding connecting plate along the third direction. Plugging plates are protrudingly arranged on both sides of the second light shielding sheet along the first direction, and the two plugging plates on the second light shielding sheet are respectively inserted and matched with the slots on the two connecting plates one by one.

[0010] In one implementation of the first aspect, a cantilever plate is protrudingly arranged at the front end of the plugging plate near the tail of the slot. A plugging gap is formed between the cantilever plate and the side surface of the second light shielding sheet, and the plugging gap is inserted and matched with the corresponding connecting plate.

[0011] In one implementation of the first aspect, an adhesive layer is provided between both ends of the second light shielding sheet and the two connecting plates, and the second light shielding sheet and the bracket are also adhesively connected through the adhesive layer.

[0012] In one implementation of the first aspect, the first light shielding sheet and all the second light shielding sheets are main light shielding sheets. The main light shielding sheet has a front surface and a back surface arranged oppositely along its thickness direction, and the front surface is used to face the return light in a non-preset echo direction; the main light shielding sheet has a first end and a second end along the third direction, and the first end is used to be close to the receiving device of the lidar. The third direction is perpendicular to the first direction and the second direction;

[0013] The first light shielding sheet is located on the front side of all the second light shielding sheets; and / or, the second end of any main light shielding sheet protrudes from the second ends of the remaining main light shielding sheets on the front side of the main light shielding sheet.

[0014] In an implementation of the first aspect, the light-shielding component further includes a side light-shielding sheet, which is located on the front side of all the main light-shielding sheets; along the second direction, from the front side to the back side of the main light-shielding sheet, the first end of the first main light-shielding sheet arranged in a stacked manner is connected to the side light-shielding sheet in a turning manner and integrally formed.

[0015] In an implementation of the first aspect, a plurality of reinforcing ribs are provided between the first main light-shielding sheet arranged in a stacked manner and the side light-shielding sheet.

[0016] In the second aspect, the present invention provides a lidar, including: a transmitting device, a receiving device, and any light-shielding component provided in the first aspect of the present invention. The transmitting device is used to emit outgoing light; the receiving device is used to receive the reflected light returned by the target object; the light-shielding component is arranged close to the receiving device. The first light-shielding sheet and all the second light-shielding sheets of the light-shielding component are main light-shielding sheets. The main light-shielding sheets are parallel to the preset echo direction, and the main light-shielding sheets can block the reflected light in the non-preset echo direction.

[0017] In an implementation of the second aspect, the lidar further includes a filter and a beam splitter; the filter is fixedly connected to the receiving device. The filter can cut off the unnecessary wavelength bands of the reflected light, and the thickness direction of the filter is parallel to the preset echo direction; the light-shielding component and the beam splitter are both arranged on the side of the filter facing away from the receiving device, and the beam splitter is located between the light-shielding component and the transmitting device; the light-shielding component is fixedly connected to the filter; the beam splitter has a reflective surface and a backlight surface. The reflective surface is arranged facing the transmitting device and is used to reflect the outgoing light emitted by the transmitting device, and reflect the outgoing light emitted along the first light-emitting direction into the light emitted along the second light-emitting direction; the backlight surface is arranged facing the filter.

[0018] In the third aspect, the present invention provides an assembly jig, which is applied to the assembly of any light-shielding component provided in the first aspect of the present invention. The assembly jig includes: a first stage and a second stage. The top surface of the first stage is a first bearing plane; the second stage is arranged above the first stage and opposite to the first stage; the surface of the second stage facing away from the first stage is a second bearing plane. One of the first bearing plane and the second bearing plane is used for placing the first light-shielding sheet, and the other is used for placing a second light-shielding sheet; along the vertical direction, the distance between the second bearing plane and the first bearing plane is equal to the sum of the thickness of the light-shielding sheet corresponding to the first bearing plane and a preset distance, and the preset distance is equal to the distance between the first light-shielding sheet and the second light-shielding sheet in the vertical direction; the height of the second stage in the vertical direction is less than or equal to the distance between the first light-shielding sheet and any second light-shielding sheet in the vertical direction.

[0019] In the fourth aspect, the present invention provides a method for assembling a light-shielding component, which is applied to any assembly jig provided in the third aspect of the present invention. The assembly method includes:

[0020] Providing a bracket and a second light-shielding sheet;

[0021] When the light-shielding component includes a second light-shielding sheet, perform an assembly step once;

[0022] When the light-shielding component includes a plurality of second light-shielding sheets, perform the assembly step multiple times in sequence until all the second light-shielding sheets are connected to the bracket;

[0023] The assembly step includes: placing one of the first light-shielding sheet of the bracket and a second light-shielding sheet on the first bearing plane and the other on the second bearing plane, and assembling and connecting the two ends of the second light-shielding sheet to the corresponding connection positions on the two connecting plates of the bracket.

[0024] In an implementation manner of the fourth aspect, the assembly step further includes: applying a vertically downward external force to the light-shielding sheet borne by the first bearing plane and the light-shielding sheet borne by the second bearing plane.

[0025] In an implementation manner of the fourth aspect, the assembly step further includes: coating an adhesive layer between the two ends of the second light-shielding sheet and the two connecting plates.

[0026] The present invention has the following beneficial effects:

[0027] For the light-shielding component provided by the present invention, by designing the bracket and the second light-shielding sheet, both the first light-shielding sheet and the second light-shielding sheet of the bracket can be used to block stray light. The two ends of each second light-shielding sheet are respectively assembled and connected to the corresponding connection positions on the two connecting plates of the bracket. In this way, by pre-assembling a plurality of second light-shielding sheets and the bracket, a light-shielding component can be pre-installed. The installation position corresponding to each second light-shielding sheet when it is fixedly connected to the connecting plate is preset and determined. Thus, if the vertical distance between any second light-shielding sheet and the first light-shielding sheet of the light-shielding component meets the design requirements, the relative position accuracy between each second light-shielding sheet and the first light-shielding sheet can be ensured, and further the installation accuracy of the light-shielding component can be ensured.

[0028] At the same time, in this embodiment, the connecting plates are used as structural members, which can play a role in positioning and installing the first light-shielding sheet and the second light-shielding sheet. Moreover, the first light-shielding sheet and each second light-shielding sheet share two structural members (i.e., the connecting plates). In this way, it can be avoided that the number of structural members (i.e., the connecting plates) increases with the increase in the total number of the first light-shielding sheet and the second light-shielding sheets, resulting in excessive occupation of the installation space.

[0029] In summary, the light-shielding component of this embodiment can not only meet the installation accuracy requirements, but also save the occupation of the installation space by the structural members to the greatest extent. Description of the Drawings

[0030] Figure 1 Schematic structural diagram of a lidar proposed for the related art;

[0031] Figure 2 Partial schematic diagram of a lidar provided by an embodiment of the present disclosure;

[0032] Figure 3 Stereoscopic structure schematic diagram of a light-shielding component provided by an embodiment of the present disclosure;

[0033] Figure 4 Exploded schematic diagram of a light-shielding component provided by an embodiment of the present disclosure;

[0034] Figure 5 Cross-sectional schematic diagram of a light-shielding component provided by an embodiment of the present disclosure;

[0035] Figure 6 is Figure 4 Partial enlarged view of point A on the light-shielding component shown;

[0036] Figure 7 is Figure 4 Partial enlarged view of point B on the light-shielding component shown;

[0037] Figure 8 Stereoscopic structure schematic of an assembly jig provided by an embodiment of the present disclosure;

[0038] Figure 9 is Figure 8 Front view schematic diagram of the assembly jig shown;

[0039] Figure 10 Application schematic diagram of an assembly jig provided by an embodiment of the present disclosure for assembling a light-shielding component provided with a second light-shielding sheet;

[0040] Figure 11 Flow schematic diagram of an assembly method provided by an embodiment of the present disclosure;

[0041] Figure 12 Stereoscopic structure schematic of an assembly jig in a first state provided by another embodiment of the present disclosure Figure 1 ;

[0042] Figure 13 Side view cross-sectional schematic diagram of an assembly jig in a first state provided by another embodiment of the present disclosure;

[0043] Figure 14 Stereoscopic structure schematic of an assembly jig in a second state provided by another embodiment of the present disclosure Figure 1 ;

[0044] Figure 15 Front view cross-sectional schematic diagram of an assembly jig in a second state provided by another embodiment of the present disclosure;

[0045] Figure 16 Side view cross-sectional schematic diagram of an assembly jig in a second state provided by another embodiment of the present disclosure;

[0046] Figure 17 Exploded view of the assembly fixture provided in another embodiment of the present disclosure in the second state;

[0047] Figure 18 Schematic perspective structure of the assembly fixture provided in another embodiment of the present disclosure in the first state Figure 2 ;

[0048] Figure 19 Schematic perspective structure of the assembly fixture provided in another embodiment of the present disclosure in the second state Figure 2 ;

[0049] Figure 20 Flow chart of the assembly method provided in another embodiment of the present disclosure;

[0050] FIG. 21(a) is a schematic front cross-sectional view of the assembly fixture for assembling the bracket and the first second light-shielding sheet in the embodiment of the present disclosure;

[0051] FIG. 21(b) is a schematic front cross-sectional view of the assembly fixture for assembling the bracket and the second second light-shielding sheet in the embodiment of the present disclosure;

[0052] Figure 22 Schematic perspective structure of the assembly fixture shown in FIG. 21(a) applied to assembling the bracket and the first second light-shielding sheet;

[0053] Figure 23 Schematic front cross-sectional view of the assembly fixture shown in FIG. 21(a) applied to assembling the bracket and the first second light-shielding sheet;

[0054] Figure 24 Schematic side cross-sectional view of the assembly fixture shown in FIG. 21(a) applied to assembling the bracket and the first second light-shielding sheet;

[0055] Figure 25 Schematic perspective structure of the assembly fixture shown in FIG. 21(b) applied to assembling the bracket and the second second light-shielding sheet;

[0056] Figure 26 Schematic front cross-sectional view of the assembly fixture shown in FIG. 21(b) applied to assembling the bracket and the second second light-shielding sheet;

[0057] Figure 27 Schematic side cross-sectional view of the assembly fixture shown in FIG. 21(b) applied to assembling the bracket and the second second light-shielding sheet.

[0058] List of reference numerals:

[0059] 100 - housing;

[0060] 200 - Assembly fixture; 210 - First carrier; 211 - Suction flow channel; 220 - Second carrier; 230 - Mounting seat; 231 - First connecting part; 232 - First groove; 240 - Pressing block; 241 - Second connecting part; 250 - Tooling table; 251 - Substrate; 252 - Vertical plate; 253 - Channel; 260 - Suction pipe; 270 - Adhesive layer; 280 - Avoidance gap;

[0061] 300 - Light-shielding component; 310 - First light-shielding sheet; 311 - Plug-in board; 312 - Cantilever board; 313 - Plug-in gap; 320 - Connecting plate; 321 - Slot; 330 - Second light-shielding sheet; 330a - First second light-shielding sheet; 330b - Second second light-shielding sheet; 340 - Reinforcing rib; 350 - Bracket; 360 - Rib plate; 370 - Side light-shielding sheet;

[0062] 400 - Beam splitter;

[0063] 500 - Rotary mirror device;

[0064] 600 - Filter;

[0065] 700 - Receiving device;

[0066] 800 - Screw. Detailed implementation manners

[0067] Next, the technical solutions in some embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present disclosure.

[0068] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third-person singular form "comprises" and the present participle form "comprising", are to be construed in an open, inclusive sense, i.e., "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example", or "some examples", etc., are intended to indicate that a specific feature, structure, material, or characteristic related to the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms do not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials, or characteristics described above may be included in any one or more embodiments or examples in any suitable manner.

[0069] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present disclosure, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0070] "At least one of A, B, and C" has the same meaning as "at least one of A, B, or C", and both include the following combinations of A, B, and C: only A, only B, only C, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C.

[0071] "A and / or B" includes the following three combinations: only A, only B, and the combination of A and B.

[0072] As used herein, "parallel", "perpendicular", and "equal" include the stated cases as well as cases similar to the stated cases, where the range of the similar cases is within an acceptable deviation range, and the acceptable deviation range is determined by a person of ordinary skill in the art considering the measurements being discussed and the errors associated with the measurements of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, where the acceptable deviation range for approximate parallelism can be, for example, within a deviation of 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where the acceptable deviation range for approximate perpendicularity can also be, for example, within a deviation of 5°. "Equal" includes absolute equality and approximate equality, where the acceptable deviation range for approximate equality can be, for example, that the difference between the two equal values is less than or equal to 5% of either one of them.

[0073] Exemplary embodiments are described herein with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the dimensions of some components are adjusted for clarity. Thus, variations in the shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Accordingly, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but include shape deviations caused by, for example, manufacturing. Thus, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shape of the regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0074] Light-shielding assembly and lidar having the same

[0075] The following embodiments of the present disclosure provide a lidar, which is not limited to being applied in the field of autonomous driving, but can also be applied to fields such as remote sensing, measurement, robotics, and drones.

[0076] The lidar of this embodiment includes a housing, a transmitting device, and a receiving device. The housing surrounds the outer periphery of the transmitting device and the receiving device, for protecting the components inside it, and the housing can also isolate the light in the external environment to prevent the light in the external environment from causing interference. A transceiver port is provided on the housing. The transmitting device is used to emit outgoing light, and the outgoing light passes through the transceiver port and projects to the surface of the target object outside the housing. After being reflected by the surface of the target object, an echo light is formed, and the echo light enters the lidar through the transceiver port and is received by the receiving device. It should be understood that when the echo light propagates along the desired path, it may be refracted due to interference by obstacles, or the light beam that does not pass through the rotating mirror enters the receiving device through the upper and lower sides of the beam splitter, forming stray light. The stray light deviates from the preset receiving direction (i.e., the preset echo direction) of the receiving device. Among them, the light incident along the preset echo direction is applicable to the processing algorithm of the receiving device for the echo light, while the stray light will interfere with the processing of the echo light by the receiving device, that is, form noise points, causing the detection result to be distorted.

[0077] In order to reduce the influence of stray light on the detection accuracy, the related art uses a light shield to block the return light in a non-preset echo direction. Figure 1 It is a schematic structural diagram of a lidar proposed by the related art. As Figure 1 shown, the lidar is provided with three light shields 310a, and the light shields 310a are arranged parallel to the preset echo direction ( Figure 1 shown as b1 in the figure) and close to the receiving device 700a, and the three light shields 310a are arranged at intervals along their thickness directions. In this way, during the application process, the return light in the non-preset echo direction ( Figure 1 shown as b2 in the figure) is projected onto the light shield 310a, a part of the stray light is absorbed by the light shield 310a, and the other part is attenuated after being reflected between two adjacent light shields 310a, so that the stray light in the return light received by the receiving device 700a can be reduced.

[0078] Among them, the reflection path of the stray light between two adjacent light shields 310a is related to the distance between two adjacent light shields 310a along their thickness directions. If there is a deviation between the actual distance and the expected distance between two adjacent light shields 310a along their thickness directions, there is still a lot of stray light that can enter the receiving device 700a, that is, the light-shielding effect of the light shield 310a is not good, resulting in low detection accuracy.

[0079] Based on this, in order to ensure the relative position accuracy of the two light shields to ensure that the light shield can achieve a good light-shielding effect, multiple structural members (for example, bosses) are also provided inside the housing in the related art, and each light shield can be installed on a corresponding structural member. In this way, the structural member is used for the installation and positioning of the light shield to ensure the distance between two adjacent light shields. Specifically, the light shield is moved into the housing and bonded to the corresponding structural member. Since there are multiple structural members corresponding to multiple light shields one by one, the multiple structural members will occupy a large installation space inside the housing. That is, for the lidar of the related art, when the relative position accuracy requirements of the two light shields are met, it is difficult to ensure that the installation space required by the structural member for the installation and positioning of the light shield is small.

[0080] Therefore, how to design the structural member for the installation and positioning of the light shield, which can not only meet the installation accuracy requirements of the light-shielding assembly composed of multiple light shields, but also save the installation space it occupies to the greatest extent, is an urgent problem to be solved.

[0081] Based on the above description, an embodiment of the present disclosure proposes a light-shielding assembly, which can be arranged close to the receiving device to block the return light in a non-preset echo direction. The structure of the light-shielding assembly provided by the embodiment of the present disclosure will be specifically described below with reference to the accompanying drawings and specific embodiments.

[0082] Figure 2A partial schematic diagram of a lidar provided by an embodiment of the present disclosure. Figure 3 A three-dimensional structural schematic diagram of a light-shielding component provided by an embodiment of the present disclosure. Please refer to Figure 2 and Figure 3 , the light-shielding component 300 includes a first light-shielding sheet 310 and two connecting plates 320. The two connecting plates 320 are arranged opposite to each other along a first direction. The two ends of the first light-shielding sheet 310 are respectively fixedly connected to the two connecting plates 320. The thickness direction of the first light-shielding sheet 310 is perpendicular to the first direction. The first light-shielding sheet 310 and the two connecting plates 320 together form a bracket 350.

[0083] The light-shielding component 300 further includes two second light-shielding sheets 330. Each connecting plate 320 is also provided with two connection positions corresponding to the two second light-shielding sheets 330 one by one. Each connection position has a gap from the first light-shielding sheet 310 in the thickness direction of the first light-shielding sheet 310. One end of the second light-shielding sheet 330 is assembled and connected to the corresponding connection position on one of the connecting plates 320, and the other end of the second light-shielding sheet 330 is assembled and connected to the corresponding connection position on the other connecting plate 320. That is to say, the second light-shielding sheet 330 is connected to the bracket 350 by an assembly method. And, the first light-shielding sheet 310 and all the second light-shielding sheets 330 are arranged at intervals along a second direction, so the first light-shielding sheet 310 and all the second light-shielding sheets 330 are parallel to each other and are all parallel to a third direction. It can be understood that the first direction, the second direction, and the third direction are perpendicular to each other in pairs, and the second direction is parallel to the thickness direction of the first light-shielding sheet 310. It should be noted that when the light-shielding component 300 is applied to a lidar, the third direction is parallel to the preset receiving direction (i.e., the preset echo direction) of the receiving device 700, and the preset echo direction is shown by a dotted arrow in Figure 2 . The second light-shielding sheet 330 has a first end and a second end along the third direction, and the first end is used to be close to the receiving device 700.

[0084] Both the first light-shielding sheet 310 and the second light-shielding sheet 330 are made of light-absorbing materials, and both the first light-shielding sheet 310 and the second light-shielding sheet 330 can be used as main light-shielding sheets to block the echo light in non-preset echo directions. Among them, the main light-shielding sheet has a front surface and a back surface arranged opposite to each other along the second direction. The front surface of each main light-shielding sheet faces the transceiver port, so the front surface faces the echo light in the non-preset echo direction to achieve the blocking of stray light. For example, the main light-shielding sheet can be a steel sheet or a black plastic sheet. A light-absorbing paint layer can also be formed on the surface of the main light-shielding sheet by spraying or electrophoresis. The light-absorbing paint layer can absorb the stray light and suppress the stray light.

[0085] It is understandable that the number of the second light-shielding sheets 330 and the number of connection positions on each connecting plate 320 are not limited to the above numbers, and can be specifically designed according to requirements and actual working conditions. For example, the second light-shielding sheets 330 can be one or three or more. By reasonably designing the positions of the respective connection positions on the connecting plate 320, the second light-shielding sheets 330 assembled and connected to the corresponding connection positions can be fixed at the preset installation positions, so that the vertical distance between any second light-shielding sheet 330 and the first light-shielding sheet 310 on the light-shielding assembly 300 can reach the desired distance between the two.

[0086] When applying the light-shielding assembly 300 of this embodiment to a lidar, each of the second light-shielding sheets 330 and the bracket 350 can be pre-assembled outside the housing 100 to obtain the light-shielding assembly 300, and then the light-shielding assembly 300 can be integrally moved into the housing 100 and then fixedly arranged near the receiving device 700.

[0087] It can be seen from this that for the light-shielding assembly 300 of this embodiment, by designing two connecting plates 320, both ends of the first light-shielding sheet 310 and each of the second light-shielding sheets 330 for blocking stray light are respectively connected to the two connecting plates 320. In this way, by pre-assembling each of the second light-shielding sheets 330 and the bracket 350, the light-shielding assembly 300 can be pre-installed, and then the light-shielding assembly 300 can be installed near the receiving device 700. For the light-shielding assembly 300, each connection position on the connecting plate 320 of the bracket 350 is preset and determined, so the installation position of each second light-shielding sheet 330 after being assembled and connected to the corresponding connection position on the connecting plate 320 is preset and determined. In this way, the vertical distance between any second light-shielding sheet 330 and the first light-shielding sheet 310 on the light-shielding assembly 300 meets the design requirements, which can ensure the relative position accuracy between each second light-shielding sheet 330 and the first light-shielding sheet 310, that is, it is beneficial to ensure the installation accuracy of the light-shielding assembly 300. That is to say, in this embodiment, the connecting plate 320 replaces the boss as the structural member, and the connection relationship between the second light-shielding sheet 330 and the two connecting plates 320 can play a role in positioning and installing the second light-shielding sheet 330.

[0088] It is easy to understand that in Figure 1 the related art shown, the number of structural members (i.e., bosses) is equal to the number of light-shielding sheets 310a. The more the light-shielding sheets 310a are, the more the structural members are, and the larger the installation space occupied by the structural members is. In this embodiment, the number of structural members (i.e., connecting plates 320) remains unchanged. Even if the total number of the first light-shielding sheet 310 and the second light-shielding sheets 330 increases, the installation space occupied by the structural members remains unchanged. This can avoid the structural members (i.e., connecting plates 320) occupying a larger installation space as the total number of the first light-shielding sheet 310 and the second light-shielding sheets 330 increases.

[0089] In summary, with this design in this embodiment, it can not only meet the installation accuracy requirements of the light-shielding component 300, but also save the occupancy of the installation space by the structural members to the greatest extent, enabling the installation space to be maximally available for the installation of relevant optical components of the lidar.

[0090] Moreover, the steps of pre-installing the light-shielding component 300 can be realized outside the housing 100, and then the entire light-shielding component 300 is installed into the housing 100. In this way, the installation difficulty of the light-shielding component 300 can be effectively reduced.

[0091] It can be understood that the connection manners between the two ends of the first light-shielding sheet 310 and the two connecting plates 320 include but are not limited to the following possibilities.

[0092] As a possible implementation manner, the two ends of the first light-shielding sheet 310 are assembled and connected to the two connecting plates 320. The connection manner between the first light-shielding sheet 310 and any one of the connecting plates 320 can be specifically realized by using snap connection technology, screw connection technology or plug connection technology. In this example, before assembling and connecting the second light-shielding sheet 330 to the connecting plate 320, the first light-shielding sheet 310 and the two connecting plates 320 can be combined and assembled in advance to obtain the bracket 350.

[0093] Figure 4 This is an exploded view of the light-shielding component provided in an embodiment of the present disclosure. As another possible implementation manner, please refer to Figure 4 , the first light-shielding sheet 310 and the two connecting plates 320 are integrally formed. That is to say, the bracket 350 is an integral structure. When the first light-shielding sheet 310 is a steel sheet, the first light-shielding sheet 310 and the two connecting plates 320 can be integrally formed into the bracket 350 by sheet metal working, or can be integrally formed into the bracket 350 by casting. When the first light-shielding sheet 310 is a black plastic sheet, the first light-shielding sheet 310 and the two connecting plates 320 can be integrally formed into the bracket 350 by injection molding.

[0094] By setting like this, not only can the assembly process of the first light-shielding sheet 310 and the two connecting plates 320 be omitted, the assembly efficiency of the light-shielding component 300 is improved, but also it is beneficial to eliminate the influence of the assembly error between the first light-shielding sheet 310 and the two connecting plates 320 on the position accuracy of the first light-shielding sheet 310. Moreover, without increasing the cost, it is beneficial to improve the structural strength of the light-shielding component 300.

[0095] An exemplary assembly process of the light-shielding component 300 in this embodiment is as follows: the bracket 350 is prepared by using an integral forming process, and the bracket 350 includes two connecting plates 320 and a first light-shielding sheet 310 located between the two connecting plates 320; then the two ends of each second light-shielding sheet 330 are respectively assembled and connected to the corresponding connection positions on the two connecting plates 320 in sequence.

[0096] Figure 5 A cross-sectional schematic view of the light-shielding component provided by an embodiment of the present disclosure. In some embodiments, please refer to Figure 5 , a rib plate 360 may be further disposed between each connecting plate 320 and the first light-shielding sheet 310. In this way, it is beneficial to enhance the structural strength of the bracket 350, and thus the structural reliability of the light-shielding component 300 can be improved.

[0097] Along the first direction, the minimum distance between the two connecting plates 320 is L1. Please continue to refer to Figures 2 to 5 , the thickness directions of the two connecting plates 320 may be parallel to the first direction, then the connecting plates 320 are perpendicularly connected to the first light-shielding sheet 310. At this time, the distance between the two connecting plates 320 is equal everywhere and is L1. Of course, in an embodiment not shown in the figure, the connecting plates 320 may also form an angle with the first light-shielding sheet 310, that is, the connecting plates 320 are inclined to the first light-shielding sheet 310. At this time, L1 is the distance between the closer ends of the two connecting plates 320. The dimension of the connecting plate 320 in the second direction is H1.

[0098] It should be noted that in the light-shielding component 300 disclosed in this article, the assembly connection method between the second light-shielding sheet 330 and the corresponding connection position is diverse.

[0099] In one way, the assembly method of the second light-shielding sheet 330 and the bracket 350 is snap connection. Specifically, the connection position includes a snap hole, the central axis of the snap hole extends along the first direction, and elastic protrusions may be convexly provided on both sides of the second light-shielding sheet 330 along the first direction, and the elastic protrusions are snap-connected to the corresponding snap holes.

[0100] In another way, the assembly method of the second light-shielding sheet 330 and the bracket 350 is screw connection. Specifically, the connection position includes a through hole, threaded holes may be provided on both sides of the second light-shielding sheet 330 along the first direction, the central axis of the through hole coincides with the central axis of the threaded hole and both extend along the first direction, and a screw passes through the through hole and extends into the threaded hole to be threadedly engaged with the threaded hole. Here, the threaded hole may also be replaced with a pin hole, and the screw may be correspondingly replaced with a positioning pin.

[0101] In yet another way, the assembly method of the second light-shielding sheet 330 and the bracket 350 is plug-in connection. Specifically, the connection position includes a slot extending along the third direction, and both ends of the second light-shielding sheet 330 are respectively plugged into the corresponding slots on the two connecting plates 320. It should be noted that the insertion direction of the second light-shielding sheet 330 inserted into the slot may be the same as or opposite to the preset echo direction. Compared with assembly methods such as snap connection and screw connection, the plug-in connection is relatively simple and convenient, which is beneficial to improving the assembly efficiency of the light-shielding component 300.

[0102] Among them, the specific implementation of forming the slot on the connecting plate 320 is diverse. For example, a slot is recessed on one side of each connecting plate 320 facing the other connecting plate 320, and the two slots corresponding to the same second light-shielding sheet 330 are opposite to each other. For another example, a first plate body and a second plate body are protrudingly arranged on one side of each connecting plate 320 facing the other connecting plate 320, and the first plate body and the second plate body are opposite and spaced along the second direction, then the connecting plate 320 and the connected first plate body and second plate body together enclose the slot. For yet another example, please continue to refer to Figure 3 and Figure 4 , the slot 321 has an opening and a slot tail along the third direction, the opening penetrates one end face of the corresponding connecting plate 320 along the third direction, and plug-in plates 311 are protrudingly arranged on both sides of the second light-shielding sheet 330 along the first direction, and the two plug-in plates 311 on the second light-shielding sheet 330 respectively correspond to the slots 321 on the two connecting plates 320 one by one, and the plug-in plates 311 are inserted into the slots 321 from the openings of the corresponding slots 321. In this embodiment, as Figures 2 to 4 shown, when the insertion direction is opposite to the preset echo direction, the opening of the slot 321 correspondingly penetrates one end face of the connecting plate 320 close to the receiving device 700. On the contrary, when the insertion direction is the same as the preset echo direction, the opening of the slot 321 correspondingly penetrates one end face of the connecting plate 320 away from the receiving device 700.

[0103] Please continue to refer to Figures 2 to 4 , when the insertion direction is opposite to the preset echo direction, the first end of the second light-shielding sheet 330 does not protrude from one end of the bracket 350 close to the receiving device 700, and the end face of the first end of the second light-shielding sheet 330 can be flush with the end face of one end of the bracket 350 close to the receiving device 700. In this way, when the lidar is provided with a filter 600 (see below), it is beneficial to ensure that the end face of one end of the bracket 350 close to the receiving device 700 can be attached and connected to the filter 600, and ensure the reliable connection between the bracket 350 and the filter 600.

[0104] In Figure 3 and Figure 4 shown in the example, that is, when the opening of the slot 321 penetrates one end face of the corresponding connecting plate 320 along the third direction, further, please refer to Figure 3 , Figure 4 and Figure 6 , a cantilever plate 312 can also be protrudingly arranged at the front end of the plug-in plate 311 close to the slot tail of the slot 321, a plug-in gap 313 is formed between the cantilever plate 312 and the side surface of the second light-shielding sheet 330, the extending direction of the plug-in gap 313 is also parallel to the third direction, and the plug-in gap 313 is in plug-in fit with the corresponding connecting plate 320. Among them, Figure 6 is Figure 4The partial enlarged view of the position A on the light-shielding component shown. In this way, the plugging board 311 can be plugged into the slot 321, and the connecting board 320 can be plugged into the corresponding plugging gap 313, which is beneficial to improving the connection reliability between the second light-shielding sheet 330 and the bracket 350.

[0105] Please continue to refer to Figure 6 , a chamfer may also be formed at the connection between the side surface of the cantilever plate 312 facing the plugging gap 313 and the end surface away from the plugging board 311. In this way, it is beneficial to reduce stress concentration. Moreover, the chamfer can play a certain guiding role to facilitate guiding the connecting board 320 to be inserted into the plugging gap 313.

[0106] In the light-shielding component 300 disclosed herein, an adhesive layer may also be provided between the two ends of the second light-shielding sheet 330 and the two connecting boards 320, that is, the second light-shielding sheet 330 and the bracket 350 are also adhesively connected through the adhesive layer. Among them, the adhesive layer can be made of, for example, acrylic double-sided tape, acrylic glue or foam glue, or can also be formed by curing liquid glue.

[0107] Adopting this design, on the one hand, it is beneficial to further improve the installation reliability of the second light-shielding sheet 330. On the other hand, the position of the second light-shielding sheet 330 can be fixed to prevent the second light-shielding sheet 330 from loosening relative to the bracket 350 and affecting the distance between it and the first light-shielding sheet 310, so as to ensure the relative position accuracy between the second light-shielding sheet 330 and the first light-shielding sheet 310, and further beneficial to ensuring the installation accuracy of the light-shielding component 300.

[0108] Exemplarily, in the scheme where the slot 321 is recessed on one side of each connecting board 320 facing the other connecting board 320, the liquid glue can be specifically filled into the slot, and then the second light-shielding sheet 330 is inserted into the corresponding slot, and then the liquid glue is cured by drying, natural drying, etc. For another example, as Figure 3 and Figure 4 shown, in the scheme where the opening of the slot 321 penetrates the end surface of the connecting board 320 along the third direction, specifically, after the plugging board 311 is inserted into the slot 321, the liquid glue is applied to the plugging connection between the connecting board 320 and the second light-shielding sheet 330, and then the liquid glue is cured by drying, natural drying, etc.

[0109] Please continue to refer to Figures 2 to 4, the light-shielding component 300 further includes a side light-shielding sheet 370, and the side light-shielding sheet 370 is located on the front side of all the main light-shielding sheets. Along the second direction, from the front side to the back side of the main light-shielding sheet, the first end of the first main light-shielding sheet arranged in a stacked manner is connected to the side light-shielding sheet 370 in a turning manner and integrally formed. Similar to the first light-shielding sheet 310 and the second light-shielding sheet 330, the side light-shielding sheet 370 is also made of a light-absorbing material (for example, a steel sheet or a black plastic sheet). The surface of the side light-shielding sheet 370 can also be formed with a matte paint layer by spraying or electrophoresis, and the matte paint layer can absorb stray light and suppress stray light.

[0110] Since the existing light-absorbing materials cannot completely absorb light, but will absorb and lose most of the light reaching the surface of the light-absorbing material, and there will still be a small amount of light reflected on the surface of the light-absorbing material. Therefore, even if the above-mentioned first light-shielding sheet 310 and the second light-shielding sheet 330 are made of a light-absorbing material, there will still be a small amount of stray light reflected on the surface of the main light-shielding sheet.

[0111] In this embodiment, the light-shielding component 300 is designed with a side light-shielding sheet 370. When the light-shielding component 300 is applied to a lidar, the side light-shielding sheet 370 can be close to the receiving device 700. The return light in the non-preset echo direction enters the interior of the housing 100 through the transceiver port and faces the front of the main light-shielding sheet. Among them, a small amount of the stray light in the stray light projected onto the front of the first main light-shielding sheet arranged in a stacked manner is reflected on the front of the first main light-shielding sheet, and the reflected stray light is emitted towards the receiving device 700 along the refraction direction (refer to Figure 1 c) in the figure, and then can be projected onto the side light-shielding sheet 370. The side light-shielding sheet 370 can block the stray light reflected by the front of the first main light-shielding sheet arranged in a stacked manner. In this way, it is beneficial to further reduce the stray light in the return light received by the receiving device 700, and thus beneficial to improving the detection accuracy.

[0112] In addition, by setting the side light-shielding sheet 370 to be integrally formed with the first main light-shielding sheet, firstly, the assembly process of the side light-shielding sheet 370 and the first main light-shielding sheet can be omitted, improving the assembly efficiency of the light-shielding component 300. Secondly, there is no need to additionally set up structural parts for the installation and positioning of the side light-shielding sheet 370, which is beneficial to avoiding the light-shielding component 300 provided with the side light-shielding sheet 370 occupying a larger installation space. Thirdly, without increasing the cost, it is beneficial to improve the structural strength of the light-shielding component 300.

[0113] The size of the orthographic projection of the side light-shielding sheet 370 on the front of the first light-shielding sheet 310 in the third direction is W1. Among them, the thickness direction of the side light-shielding sheet 370 can be parallel to the third direction, then the side light-shielding sheet 370 can be specifically perpendicular to the first main light-shielding sheet. At this time, the thickness of the side light-shielding sheet 370 is equal to W1. Or, an included angle can also be formed between the side light-shielding sheet 370 and the first main light-shielding sheet.

[0114] As a further optional embodiment, a plurality of reinforcing ribs 340 are further provided between the first main light-shielding sheet and the side light-shielding sheet 370 arranged in a stacked manner, and the plurality of reinforcing ribs 340 are arranged at intervals in sequence along the first direction. Such a design is conducive to improving the structural strength and structural reliability of the light-shielding component 300. Among them, the size of the orthographic projection of the reinforcing rib 340 on the front surface of the first light-shielding sheet 310 along the third direction is W2.

[0115] According to Figure 2 and Figure 3 In the specific example shown, the first light-shielding sheet 310 can be located on the front side of all the second light-shielding sheets 330. That is to say, along the second direction from the front side to the back side of the main light-shielding sheet, the first light-shielding sheet 310 is the first main light-shielding sheet arranged in a stacked manner. In this technical solution, when the first light-shielding sheet 310 and the two connecting plates 320 are integrally formed, that is, when the bracket 350 is an integral structure, the bracket 350 is specifically in an inverted "U" shape. On the basis of this embodiment, when the light-shielding component 300 further includes a side light-shielding sheet 370, the side light-shielding sheet 370 is specifically connected to and integrally formed with the first light-shielding sheet 310. That is, the first light-shielding sheet 310, the side light-shielding sheet 370, and the two connecting plates 320 are jointly made into the bracket 350 through an integral forming process. Correspondingly, as Figure 7 shown, a reinforcing rib 340 can be formed between the first light-shielding sheet 310 and the side light-shielding sheet 370. Among them, Figure 7 is Figure 4 a partial enlarged view of the B position on the light-shielding component shown.

[0116] In other feasible examples, the first light-shielding sheet 310 can also be located on the back side of all the second light-shielding sheets 330. That is to say, along the second direction from the front side to the back side of the main light-shielding sheet, the first light-shielding sheet 310 is the last main light-shielding sheet arranged in a stacked manner. In this solution, the bracket 350 is specifically in a "└┘" shape. On the basis of this embodiment, when the light-shielding component 300 further includes a side light-shielding sheet 370, the side light-shielding sheet 370 is specifically connected to and integrally formed with the first second light-shielding sheet 330 arranged in a stacked manner.

[0117] In any of the above embodiments, as Figure 2 shown, the second end of any main light-shielding sheet protrudes from the second ends of the remaining main light-shielding sheets on the front side of the main light-shielding sheet. In other words, from the front side to the back side of the main light-shielding sheet, the widths of the respective main light-shielding sheets gradually increase in the third direction. When the light-shielding component 300 of this embodiment is applied to a lidar, the main light-shielding sheet farther away from the transceiver port is wider, and the main light-shielding sheet closer to the transceiver port is narrower. In this way, on the premise of ensuring that the light-shielding component 300 effectively blocks the return light in non-preset echo directions, the overall volume of the light-shielding component 300 can be reduced, and the manufacturing cost of the light-shielding component 300 can be reduced.

[0118] In some embodiments, please refer to Figure 1 and Figure 2 , the lidar may further include a filter 600. The thickness direction of the filter 600 is parallel to the preset echo direction. The filter 600 is fixedly connected to the receiving device 700, and the light-shielding component 300 is fixedly connected to the filter 600. The filter 600 can cut off unnecessary bands of the echo light. In this example, specifically, the light-shielding component 300 can be pre-installed outside the housing 100, and then the light-shielding component 300 is moved into the housing 100 and the light-shielding component 300 is arranged on the side of the filter 600 facing away from the receiving device 700.

[0119] During the operation of the lidar, the echo light in a non-preset echo direction is projected onto the main light-shielding sheet, and multiple reflections occur between adjacent two main light-shielding sheets and are absorbed multiple times. Finally, only a small amount of stray light enters the filter 600.

[0120] In some embodiments, please refer to Figure 2 , the lidar of this embodiment may further include a beam splitter 400 and a rotating mirror device 500. The beam splitter 400 is located between the light-shielding component 300 and the transmitting device. The beam splitter 400 has a reflective surface and a backlight surface. The reflective surface is arranged facing the transmitting device and the rotating mirror device 500. The reflective surface is used to reflect the outgoing light emitted by the transmitting device, and the outgoing light emitted along the first light-emitting direction A1 is reflected to be emitted along the second light-emitting direction A2. The backlight surface is arranged facing the light-shielding component 300 and the filter 600.

[0121] The rotating mirror device 500 is used to reflect the outgoing light along the second light-emitting direction A2 to the transceiver port so that the outgoing light is emitted to the surface of the target object. After the outgoing light is reflected by the surface of the target object, an echo light is formed and enters the inside of the lidar through the transceiver port. The rotating mirror device 500 can also be used to reflect the echo light to pass through the filter 600 and enter the receiving device 700, so that the receiving device 700 can receive the echo light and analyze the echo light, thereby obtaining parameters such as the distance and speed relative to the target object. Since the reflective surface has a reflective function, the echo light will not pass through the beam splitter 400, but will be emitted to the receiving device 700 in the area around the beam splitter 400.

[0122] Assembly jig 200 and assembly method for assembling the light-shielding component 300 provided with a second light-shielding sheet 330

[0123] To ensure the installation accuracy of the light-shielding component 300 in the above embodiments, in this embodiment, an assembly jig and an assembly method applied to the assembly jig are provided. Using this assembly jig can assist in the assembly of the light-shielding component 300. First, the assembly jig for assisting in the assembly of the light-shielding component 300 having one second light-shielding sheet 330 will be introduced below. It is set that the thickness of the first light-shielding sheet 310 is T, the thickness of the second light-shielding sheet 330 is t, and the vertical distance between the first light-shielding sheet 310 and the second light-shielding sheet 330 is δ. According to the assembly requirements of the light-shielding component 300, the assembly jig can be customized accordingly.

[0124] Figure 8 Schematic perspective structure of the assembly jig provided by an embodiment of the present disclosure, Figure 9 is Figure 8 the front view schematic diagram of the shown assembly jig, Figure 10 Schematic application diagram of the assembly jig provided by an embodiment of the present disclosure for assembling a light-shielding component provided with one second light-shielding sheet. Please refer to Figures 8 to 10 , the assembly jig 200 includes a first carrier 210 and a second carrier 220. The second carrier 220 is disposed above the first carrier 210 and is opposite to the first carrier 210. For clear understanding, in each of the drawings of the embodiments of the present disclosure, the X-axis, Y-axis, and Z-axis respectively represent the length direction, width direction, and height direction of the assembly jig 200. The dimension of the first carrier 210 in the length direction X is L2, and the dimension of the second carrier 220 in the length direction X is L3. L2 and L3 can be equal or unequal. When L2 and L3 are equal, the orthographic projections of the first carrier 210 and the second carrier 220 on the horizontal plane can also completely coincide.

[0125] The top surface of the first carrier 210 is a first bearing plane. The second carrier 220 has a second bearing plane and a non-bearing plane disposed opposite to each other in the vertical direction (i.e., the height direction Z of the assembly jig 200). The second bearing plane faces away from the first bearing plane, so the non-bearing plane is located between the first bearing plane and the second bearing plane. Among them, the distance between the non-bearing plane and the first bearing plane in the vertical direction Z is d1, the height of the second carrier 220 in the vertical direction Z is d2, and the distance between the first bearing plane and the second bearing plane in the vertical direction Z is D. D = d1 + d2, and d2 ≤ δ.

[0126] In one example, the distance D between the first bearing plane and the second bearing plane in the vertical direction Z = T + a preset distance ΔD = T + δ, that is, ΔD = δ, and T ≤ d1. As Figure 10As shown in (a), the assembly process of assembling the light-shielding component 300 using the assembly fixture 200 with this design is generally as follows: Provide the bracket 350 and the second light-shielding sheet 330; Move the bracket 350 along the width direction Y of the assembly fixture 200 so that the bracket 350 is placed on the first carrier 210 and the first light-shielding sheet 310 is attached to the first bearing plane, and the two connecting plates 320 are respectively located on both sides of the second carrier 220 in the length direction X. Move the second light-shielding sheet 330 along the width direction Y of the assembly fixture 200 so that the second light-shielding sheet 330 is placed on the second bearing plane, and assemble and connect the two ends of the second light-shielding sheet 330 to the corresponding connection positions on the two connecting plates 320 of the bracket 350. Here, it should be noted that when the bracket 350 is placed on the first carrier 210, the first direction is the length direction X, the second direction is the height direction Z, and the third direction is the width direction Y. Since T ≤ d1, when the first light-shielding sheet 310 is placed on the first bearing plane, the first light-shielding sheet 310 will not interfere with the second carrier 220.

[0127] In another example, the distance D between the first bearing plane and the second bearing plane in the vertical direction is D = t + δ, that is, ΔD = δ, and t ≤ d1. As Figure 10 As shown in (b), the assembly process of assembling the light-shielding component 300 using the assembly fixture 200 with this design is generally as follows: Provide the bracket 350 and the second light-shielding sheet 330; Move the bracket 350 along the width direction Y of the assembly fixture 200 so that the bracket 350 is placed on the second carrier 220 and the first light-shielding sheet 310 is attached to the second bearing plane, and the two connecting plates 320 are respectively located on both sides of the first carrier 210 and the second carrier 220 in the length direction X. Move the second light-shielding sheet 330 along the width direction Y of the assembly fixture 200 so that the second light-shielding sheet 330 is placed on the first bearing plane, and assemble and connect the two ends of the second light-shielding sheet 330 to the corresponding connection positions on the two connecting plates 320 of the bracket 350. Here, it should be noted that since t ≤ d1, when the second light-shielding sheet 330 is placed on the first bearing plane, the second light-shielding sheet 330 will not interfere with the second carrier 220.

[0128] If the thickness T of the first light-shielding sheet 310 is equal to the thickness t of the second light-shielding sheet 330, D = T + δ = t + δ, T = t ≤ d1. When using the assembly fixture 200 with this design to assemble the light-shielding component 300, the first light-shielding sheet 310 can be placed on the first bearing plane and the second light-shielding sheet 330 can be placed on the second bearing plane, or the second light-shielding sheet 330 can be placed on the first bearing plane and the first light-shielding sheet 310 can be placed on the second bearing plane.

[0129] Generally speaking, one of the first bearing plane and the second bearing plane is used for placing the first light-shielding sheet 310, and the other is used for placing the second light-shielding sheet 330 to be assembled. The distance D between the second bearing plane and the first bearing plane is equal to the sum of the thickness of the light-shielding sheet carried by the first bearing plane and the preset distance ΔD. Wherein, the preset distance is equal to the vertical distance between the first light-shielding sheet 310 and the second light-shielding sheet 330 to be assembled.

[0130] Based on the content described above, Figure 11 Please refer to the flowchart of the assembly method provided by an embodiment of the present disclosure. Figure 11 When using the assembly jig 200 of this embodiment to assist in assembling the light-shielding component 300 with one second light-shielding sheet 330, the assembly method includes the following steps.

[0131] S10, Provide the bracket 350 and the second light-shielding sheet 330.

[0132] S20, Execute the assembly step S200 once; wherein, the assembly step S200 includes: S210, Place one of the first light-shielding sheet 310 and the second light-shielding sheet 330 of the bracket 350 on the first bearing plane and the other on the second bearing plane, and assemble and connect the two ends of the second light-shielding sheet 330 to the corresponding connection positions on the two connecting plates 320 of the bracket 350.

[0133] It is easy to understand that in the example of the structure of the bracket 350 as Figures 2 to 4 shown, when performing the assembly step, the bracket 350 is placed on the first stage 210 in the "└┘" posture. To avoid interference between the connecting plate 320 and the second stage 220, L3 < L1. In this way, when the bracket 350 is placed on the first stage 210, the second stage 220 can be located between the two connecting plates 320. Or, when performing the assembly step, the bracket 350 is placed on the second stage 220 in the "ㄇ" posture. To avoid interference between the connecting plate 320 and the first stage 210 and the second stage 220, L2 < L1 and L3 < L1. In this way, when the bracket 350 is placed on the second stage 220, both the first stage 210 and the second stage 220 can be located between the two connecting plates 320. And, H1 can also be less than the distance H2 in the vertical direction between the second bearing plane and the bottom surface of the first stage 210, so that the height of the second stage 220 is sufficient for the bracket 350 to be placed.

[0134] In the above assembly steps, the connection method of the two ends of the second light-shielding sheet 330 to the corresponding connection positions on the two connecting plates 320 of the bracket 350 can be any one of snap connection, screw connection, pin connection, or plug connection. It should be particularly noted that when the two ends of the second light-shielding sheet 330 are connected to the corresponding connection positions by plug connection, during the assembly steps, the stacking order of the second light-shielding sheet 330 and the bracket 350 is related to the position and attitude of the bracket 350 and the insertion direction of the second light-shielding sheet 330 inserted into the bracket 350. This embodiment does not make specific restrictions on this.

[0135] It can be seen from this that when using the assembly jig 200 of this embodiment to assist in assembling the light-shielding component 300 provided with a second light-shielding sheet 330, by placing one of the first light-shielding sheet 310 of the bracket 350 and the second light-shielding sheet 330 to be assembled on the first bearing plane and the other on the second bearing plane, and assembling the second light-shielding sheet 330 and the bracket 350, the first bearing plane and the second bearing plane can play a positioning role to ensure the relative position accuracy of the first light-shielding sheet 310 of the bracket 350 and the second light-shielding sheet 330 connected to the corresponding connection positions. Furthermore, the installation accuracy of the assembled light-shielding component 300 can be ensured. Based on this, it can be understood that when the light-shielding component 300 assembled by the assembly jig 200 is applied to a lidar, the relative position accuracy between the first light-shielding sheet 310 and the second light-shielding sheet 330 is relatively high. In this way, the influence of the low relative position accuracy between the first light-shielding sheet 310 and the second light-shielding sheet 330 on the light-shielding effect of the light-shielding component 300 can be reduced or eliminated, so as to reduce the possibility of stray light entering the receiving device 700, and thus the detection accuracy of the lidar can be significantly improved.

[0136] Exemplarily, the above first bearing plane and the above second bearing plane can be ground by a high-precision grinding machine, and the first bearing plane and the second bearing plane have a high flatness to ensure the relative position accuracy between the second light-shielding sheet 330 and the first light-shielding sheet 310 positioned by the first bearing plane and the second bearing plane.

[0137] As an alternative embodiment, as Figure 11 shown, the above assembly step S200 may further include step S220 after S210.

[0138] S220, apply a vertically downward external force to the light-shielding sheet corresponding to the first bearing plane and the light-shielding sheet corresponding to the second bearing plane.

[0139] The specific implementation process of S220 may include the following steps: S221, applying a vertically downward external force to the light-shielding sheet carried by the first carrying plane; S222, applying a vertically downward external force to the light-shielding sheet carried by the second carrying plane. Among them, the execution order of S221 and S222 is non-restrictive, and S221 and S222 can be executed successively or simultaneously.

[0140] S221 and S222 can be implemented manually, that is, the operator manually applies the external force. Or, in some embodiments, the assembly fixture 200 further includes a first force-applying structure and a second force-applying structure. The first force-applying structure is configured to be able to apply a vertically downward external force to the light-shielding sheet carried by the first carrying plane, and the second force-applying structure is configured to be able to apply a vertically downward external force to the light-shielding sheet carried by the second carrying plane. In this way, the above S221 can be specifically implemented by the first force-applying structure, and the above S222 can be specifically implemented by the second force-applying structure, and the automation degree of the assembly fixture 200 is high.

[0141] Figure 12 Schematic three-dimensional structure of the assembly fixture provided by another embodiment of the present disclosure in the first state Figure 1 , Figure 13 Schematic side cross-sectional view of the assembly fixture provided by another embodiment of the present disclosure in the first state, Figure 14 Schematic three-dimensional structure of the assembly fixture provided by another embodiment of the present disclosure in the second state Figure 1 , Figure 15 Schematic front cross-sectional view of the assembly fixture provided by another embodiment of the present disclosure in the second state, Figure 16 Schematic side cross-sectional view of the assembly fixture provided by another embodiment of the present disclosure in the second state, Figure 17 Exploded view of the assembly fixture provided by another embodiment of the present disclosure in the second state, Figure 18 Schematic three-dimensional structure of the assembly fixture provided by another embodiment of the present disclosure in the first state Figure 2 , Figure 19 Schematic three-dimensional structure of the assembly fixture provided by another embodiment of the present disclosure in the second state Figure 2 .

[0142] Please refer to Figures 12 to 19 , the second force-applying structure may include a first connecting portion 231 and a pressing block 240. The pressing block 240 is provided with a second connecting portion 241, and the second connecting portion 241 is detachably connected to the first connecting portion 231, so that the assembly fixture 200 has a first state and a second state. In the first state, as Figure 12 shown, the first connecting portion 231 is separated from the second connecting portion 241, and the pressing block 240 is not installed above the second stage 220. In the second state, as Figure 14As shown, the first connecting portion 231 is connected to the second connecting portion 241, and the pressing block 240 is installed above the second stage 220. And, as Figure 15 and 16 shown, in the second state, there is still a gap between the bottom surface of the pressing block 240 and the second bearing plane, and the distance between the bottom surface of the pressing block 240 and the second bearing plane in the vertical direction Z is d3.

[0143] When D = T + δ, t = d3. When using the assembly jig 200 designed in this way to assemble the light-shielding component 300, please refer to Figure 10 as shown in (a) of FIG. The first light-shielding sheet 310 is placed on the first bearing plane, and the second light-shielding sheet 330 is placed on the second bearing plane. S222 specifically connects the second connecting portion 241 to the first connecting portion 231. Since d3 is equal to the thickness t of the second light-shielding sheet 330, the pressing block 240 presses against the surface of the second light-shielding sheet 330 facing away from the first light-shielding sheet 310 at this time, that is, the pressing block 240 applies pressure to the second light-shielding sheet 330.

[0144] When D = t + δ, T = d3. When using the assembly jig 200 designed in this way to assemble the light-shielding component 300, please refer to Figure 10 as shown in (b) of FIG. The second light-shielding sheet 330 is placed on the first bearing plane, and the first light-shielding sheet 310 is placed on the second bearing plane. S222 specifically connects the second connecting portion 241 to the first connecting portion 231. Since d3 is equal to the thickness T of the first light-shielding sheet 310, the pressing block 240 presses against the surface of the first light-shielding sheet 310 facing away from the second light-shielding sheet 330 at this time, that is, the pressing block 240 applies pressure to the first light-shielding sheet 310.

[0145] Please refer to Figures 12 to 19 . The first force-applying structure may include an air suction pipe 260 and an air extraction device (not shown in the figure). A suction flow channel 211 is formed inside the first stage 210. The inlet end of the suction flow channel 211 is exposed on the first bearing plane, and the outlet end is connected to the air extraction device through the air suction pipe 260. The air extraction device can drive air to flow from the inlet end to the outlet end, so as to form a negative pressure in the suction flow channel 211. S221 specifically uses the air extraction device to extract air, so that the light-shielding sheet correspondingly borne on the first bearing plane is subjected to a negative pressure to be adsorbed and fixed on the first bearing plane.

[0146] In this embodiment, after the second light-shielding sheet 330 is assembled to the bracket 350, an external force is applied vertically downward to the first light-shielding sheet 310 and the second light-shielding sheet 330, so that the first light-shielding sheet 310 and the second light-shielding sheet 330 are closely attached to the corresponding bearing planes, further ensuring that the first bearing plane and the second bearing plane play a positioning role, which is beneficial to ensuring the relative position accuracy between the first light-shielding sheet 310 and the second light-shielding sheet 330, and thus ensuring that the light-shielding assembly 300 has a high installation accuracy.

[0147] It should be noted that in this embodiment, when the bracket 350 is of an integral structure, the bracket 350 can be manufactured by an integral molding process in the above step S10. When the first light-shielding sheet 310 is connected to the connecting plate 320 by an assembly method (such as clamping, screwing or plugging), the above step S10 can also use the assembly jig 200 to assist in the assembly of the bracket 350. Specifically, the implementation process of "providing the bracket 350" in step S10 may include steps S111 to S114.

[0148] S111, place the first light-shielding sheet 310 on the first bearing plane of the first stage 210.

[0149] S112, apply an external force vertically downward to the first light-shielding sheet 310 through the first force-applying structure, so that the first light-shielding sheet 310 is fixedly attached to the first bearing plane.

[0150] S113, move a connecting plate 320 to the vicinity of one end of the first light-shielding sheet 310, and assemble and connect the connecting plate 320 with the first light-shielding sheet 310.

[0151] S114, move the other connecting plate 320 to the vicinity of the other end of the first light-shielding sheet 310, and assemble and connect the connecting plate 320 with the first light-shielding sheet 310.

[0152] In some embodiments, the implementation process of "providing the bracket 350" in step S10 can also be replaced by including steps S115 to S118. S115, place the first light-shielding sheet 310 on the second bearing plane of the second stage 220. S116, apply an external force vertically downward to the first light-shielding sheet 310 through the second force-applying structure, so that the first light-shielding sheet 310 is fixedly attached to the second bearing plane. S117 is similar to S113, and S118 is similar to S114, and will not be elaborated herein in this embodiment.

[0153] It can be seen that the assembly jig 200 of this embodiment can not only be used to assist in the assembly of the second light-shielding sheet 330 and the bracket 350, but also be used to assist in the assembly of the bracket 350. The application scenarios of the assembly jig 200 are diverse. An external force is applied vertically downward to the first light-shielding sheet 310 through the first force application structure or the second force application structure to prevent the first light-shielding sheet 310 from moving, and then the first light-shielding sheet 310 and the connecting plate 320 are assembled.

[0154] Of course, the above second force application structure can also refer to the first force application structure, that is, the second force application structure can also include an air suction pipe 260 and an air extraction device, and negative pressure is applied to the light-shielding sheet correspondingly carried on the second bearing plane by air extraction through the air extraction device. In the embodiment where the first light-shielding sheet 310 and the second light-shielding sheet 330 are steel sheets, the first force application structure can be replaced by an electromagnet device. When the electromagnet device is energized, a magnetic suction force is generated between the first light-shielding sheet 310 placed on the first bearing plane or the second light-shielding sheet 330 placed on the first bearing plane, so that the light-shielding sheet is closely attached to the first bearing plane under the action of the magnetic suction force.

[0155] In the following, an example is given in which the first force application structure includes an air suction pipe 260 and an air extraction device, and the second force application structure includes a pressing block 240, which should not be regarded as a limitation to the present disclosure.

[0156] It is easy to understand that the assembly jig 200 of this embodiment can be placed on a table for use, and the first stage 210 and the second stage 220 are adaptively fixedly connected to the table. Alternatively, the assembly jig 200 can also be hung on a wall for use, and the first stage 210, the second stage 220 and the first connecting portion 231 are adaptively arranged on the wall.

[0157] In some embodiments, as Figures 12 to 19 shown, the assembly jig 200 further includes a tooling table 250, and the first stage 210, the second stage 220 and the first connecting portion 231 are all fixedly arranged on the tooling table 250. Among them, the tooling table 250 can be a block structure or a plate structure. With such a setting, the tooling table 250 provides stable support for the first stage 210, the second stage 220 and the first connecting portion 231. On the basis of this embodiment, the assembly jig 200 can further include a workbench (not shown in the figure), the tooling table 250 is stacked above the workbench, and the tooling table 250 is fixedly connected to the workbench. In this way, the workbench plays a supporting role for the tooling table 250. In the assembly jig 200 disclosed herein, the tooling table 250 and the workbench can be screwed together by screws 800, and can also be connected by means such as clamping, plugging, welding, etc. Please refer to Figures 12 to 19The tooling platform 250 may specifically include a substrate 251 and a vertical plate 252 erected on the substrate 251, the first carrier 210 is fixed on the substrate 251, and the first carrier 210, the second carrier 220 and the first connecting portion 231 are arranged on the same side of the vertical plate 252. In this way, the substrate 251 supports the first carrier 210. When the assembly jig 200 of this embodiment is used to assemble the bracket 350 and the second light shielding sheet 330, the bracket 350 and the second light shielding sheet 330 are moved along the width direction Y from the vertical plate 252 toward one side of the first carrier 210 to the other side close to the vertical plate 252.

[0158] The first carrier 210 can also be fixedly connected to the vertical plate 252. As in the assembly jig 200 disclosed herein, the first carrier 210 can be fixedly connected to the vertical plate 252 by using techniques such as clamping, welding, and screwing. In some embodiments, the first carrier 210 and the vertical plate 252 can also be formed into an integral part by an integral molding process. In this way, it is not only beneficial to save the assembly process between the first carrier 210 and the vertical plate 252, but also to improve the structural reliability of the first carrier 210 without increasing the cost.

[0159] The second carrier 220 is not limited to Figure 12 The second stage 220 is shown to be fixed on the vertical plate 252, and can also be configured to be fixedly connected to the base plate 251. For example, both ends of the second stage 220 are connected to the base plate 251 through support rods. Similarly, the first connecting portion 231 is not limited to being fixed on the vertical plate 252, and can also be set on the base plate 251, or on the flange of the first stage 210, wherein the flange is specifically formed on the side of the first stage 210 along the length direction X.

[0160] exist Figure 15 In the specific example shown, the assembly fixture 200 further includes a mounting seat 230, which can be fixed on the vertical plate 252 or on the base plate 251, and the first connecting portion 231 is disposed on the mounting seat 230. With this design, the mounting seat 230 provides a reliable installation for the first connecting portion 231.

[0161] In a specific embodiment, the method for realizing the detachable connection between the first connection part 231 and the second connection part 241 can be any one or more of the methods such as screw connection, snap connection, magnetic connection, etc. Taking the magnetic connection as an example, one of the first connection part 231 and the second connection part 241 is a magnet, and the other is configured to be magnetically attracted to the magnet, so that the pressing block 240 is magnetically connected to the mounting seat 230 through the magnetic force between the first connection part 231 and the second connection part 241. Compared with the screw connection and other methods, in this embodiment, the pressing block 240 can be connected to the mounting seat 230 or the pressing block 240 can be disassembled and separated from the mounting seat 230 without the help of installation tools, and the disassembly and assembly are simple and convenient.

[0162] Exemplarily, one of the first connecting portion 231 and the second connecting portion 241 is a magnet, and the other is made of a magnetic metal (for example, iron, cobalt, nickel). The above magnet is not limited to a permanent magnet and can also be an electromagnet. As another example, both the first connecting portion 231 and the second connecting portion 241 are magnetic members, and specifically, the first connecting portion 231 and the second connecting portion 241 are permanent magnets. Compared with an electromagnet, a permanent magnet has the advantages of strong and constant magnetism, and does not require a power supply, which is beneficial to cost savings.

[0163] In some embodiments, please refer to Figure 12 、 Figure 15 and Figure 17 As shown in, a first groove 232 is provided on the mounting base 230, and the first connecting portion 231 is fitted in the first groove 232, and the first connecting portion 231 does not protrude from the first groove 232. In this way, the first connecting portion 231 can be stably fixed on the mounting base 230. In some embodiments, a second groove is provided on the pressing block 240, and the second connecting portion 241 is fitted in the second groove, and the second connecting portion 241 does not protrude from the second groove. In this way, the second connecting portion 241 can be stably fixed on the mounting base 230. In the embodiment where the mounting base 230 is provided with the first groove 232 and the pressing block 240 is provided with the second groove, when the first connecting portion 231 is connected to the second connecting portion 241, the pressing block 240 abuts against the mounting base 230.

[0164] As Figure 15 shown, there are two first connecting portions 231 and two second connecting portions 241 respectively. Correspondingly, there are also two mounting bases 230. By increasing the number of sets of the first connecting portion 231 and the second connecting portion 241, it is beneficial to improve the connection reliability between the two. Of course, the number of the first connecting portion 231 and the second connecting portion 241 is not limited to the above, and can be specifically designed according to requirements and actual working conditions.

[0165] In the embodiment where the workbench 250 is provided with the vertical plate 252, when the first connecting portion 231 is connected to the second connecting portion 241, the pressing block 240 can be attached to the surface of the vertical plate 252 facing the first carrier 210. In this way, during the process of pressing the pressing block 240 against the first light-shielding sheet 310 carried on the second bearing plane, the surface of the vertical plate 252 facing the first carrier 210 can play a guiding role to guide the pressing block 240 to move downward along the height direction Z.

[0166] As another alternative, please continue to refer to Figure 16, when the first connecting portion 231 is connected to the second connecting portion 241, the pressing block 240 is opposite to the vertical plate 252, and a clearance gap 280 is formed between the pressing block 240 and the vertical plate 252. The dimension of the clearance gap 280 in the width direction Y of the assembly jig 200 is ε, and ε≥W1. It can be understood that the assembly jig 200 of this embodiment can be used to assemble the light-shielding component 300 with the side light-shielding sheet 370.

[0167] Here, taking the light-shielding component 300 as Figures 2 to 4 shown as an example, that is, the first main light-shielding sheet in the stacked arrangement is the first light-shielding sheet 310. At this time, the bracket 350 includes two connecting plates 320, the first light-shielding sheet 310 and the side light-shielding sheet 370. When assembling the bracket 350 with the second light-shielding sheet 330, during the assembly process, the bracket 350 can be placed on the second carrier 220 and the side light-shielding sheet 370 can be attached to the surface of the vertical plate 252 facing the first carrier 210. Then, when the first connecting portion 231 is connected to the second connecting portion 241 to apply an external force to the first light-shielding sheet 310, because ε≥W1, the side light-shielding sheet 370 is located within the clearance gap 280.

[0168] It can be seen that when using the assembly jig 200 to assemble the light-shielding component 300 with the side light-shielding sheet 370, the clearance gap 280 can avoid the side light-shielding sheet 370, which is beneficial to avoiding interference between the pressing block 240 and the side light-shielding sheet 370.

[0169] Furthermore, ε can also satisfy: ε≥W1 + W2. It can be understood that the assembly jig 200 of this embodiment can be used to assemble the light-shielding component 300 with the side light-shielding sheet 370 and the reinforcing rib 340. Taking the light-shielding component 300 as Figures 2 to 4 shown as an example, when assembling the bracket 350 with the second light-shielding sheet 330, during the assembly process, when the first connecting portion 231 is connected to the second connecting portion 241 to apply an external force to the first light-shielding sheet 310, because ε≥W1 + W2, the side light-shielding sheet 370 and the reinforcing rib 340 are located within the clearance gap 280. It can be seen that when using the assembly jig 200 to assemble the light-shielding component 300 with the side light-shielding sheet 370 and the reinforcing rib 340, the clearance gap 280 can avoid the side light-shielding sheet 370 and the reinforcing rib 340, which is beneficial to avoiding interference between the pressing block 240 and the side light-shielding sheet 370 and the reinforcing rib 340, and ensuring that the pressing block 240 can press against the first light-shielding sheet 310 carried by the second bearing plane.

[0170] In the embodiment where the vertical plate 252 is provided on the tooling table 250, the outlet end of the suction channel 211 also exposes on the side of the first carrier 210 facing the vertical plate 252. A channel 253 is provided on the vertical plate 252, and the channel 253 communicates with the outlet end. One end of the suction pipe 260 extends into the channel 253 from the side of the vertical plate 252 facing away from the first carrier 210. In this way, the suction pipe 260 extends on the side of the vertical plate 252 facing away from the first carrier 210, which is beneficial to avoid interference between the suction pipe 260 and components such as the first carrier 210 and the second carrier 220.

[0171] Among them, two suction channels 211 are formed inside the first carrier 210, and correspondingly two suction pipes 260 are provided. The two suction pipes 260 are in one-to-one correspondence and communication with the two suction channels 211. By increasing the number of suction channels 211, it is beneficial to increase the negative pressure received by the light-shielding sheet carried on the first bearing plane and ensure the stability of the light-shielding sheet on the first bearing plane.

[0172] Of course, the number of the suction channels 211 and the suction pipes 260 is not limited to the above numbers, and can be specifically designed according to requirements and actual working conditions. When there are multiple suction pipes 260, each suction pipe 260 can be correspondingly connected to a suction device, or multiple suction pipes 260 are jointly connected to a suction device. In this way, the number of suction devices is small, which is beneficial to cost savings.

[0173] In some embodiments, as Figure 11 shown, the above assembly step S200 may further include step S230 after S210.

[0174] S230, coat an adhesive layer between the two ends of the second light-shielding sheet 330 and the two connecting plates 320.

[0175] It should be particularly noted that in the embodiment where the assembly method further includes step S220, the execution order of step S230 is after S220.

[0176] In this way, when the second light-shielding sheet 330 is assembled to the bracket 350 and there is a high relative position accuracy between the second light-shielding sheet 330 and the first light-shielding sheet 310, the second light-shielding sheet 330 is fixed by bonding the bracket 350 and the second light-shielding sheet 330, which is beneficial to avoid loosening of the second light-shielding sheet 330 relative to the bracket 350 and affecting the relative position accuracy, and further improve the installation accuracy of the light-shielding component 300 assembled by using this assembly method.

[0177] Assembly jig 200 and assembly method for assembling a light-shielding component 300 provided with a plurality of second light-shielding sheets 330

[0178] In this embodiment, the same assembly jig 200 can be used to assemble each second light-shielding sheet 330 and the bracket 350. At this time, the assembly jig 200 may further include a driving device, and the driving device can drive the first carrier 210 to lift in the height direction Z. By controlling the lifting of the first carrier 210 relative to the tooling table 250 through the driving device, the distance D between the first bearing plane and the second bearing plane can be changed.

[0179] In this embodiment, different assembly jigs 200 can also be used to assemble each second light-shielding sheet 330 and the bracket 350, and the distances D between the first bearing plane and the second bearing plane on each assembly jig 200 are different. Each assembly jig 200 is customized according to the assembly requirements of the light-shielding component 300. The following takes this assembly method as an example for illustrative description. Figure 20 The flowchart of the assembly method provided for another embodiment of the present disclosure is shown in Figure 20 In this embodiment, the assembly method of the light-shielding component 300 may specifically include the following steps.

[0180] S10. Provide the bracket 350 and the second light-shielding sheet 330.

[0181] S20. Execute the assembly step S200 multiple times in sequence until all the second light-shielding sheets 330 are connected to the bracket 350. Among them, the assembly step S200 includes: S210. Place one of the first light-shielding sheet 310 of the bracket 350 and the second light-shielding sheet 330 on the first bearing plane, and place the other on the second bearing plane, and assemble and connect the two ends of the second light-shielding sheet 330 to the corresponding connection positions on the two connecting plates 320 of the bracket 350.

[0182] The multiple assembly steps are respectively assisted by different assembly jigs 200, and each assembly jig 200 can be designed with reference to the assembly jig 200 for assembling the light-shielding component 300 provided with one second light-shielding sheet 330 in the above text.

[0183] This embodiment takes the light-shielding component 300 as Figures 2 to 4 shown, that is, the light-shielding component 300 is provided with two second light-shielding sheets 330 as a representative example for illustrative description. Correspondingly, two assembly jigs 200 are used to assemble the two second light-shielding sheets 330 and the bracket 350 respectively.

[0184] For the convenience of description, one second light-shielding sheet 330 close to the first light-shielding sheet 310 is called the first second light-shielding sheet 330a, and one second light-shielding sheet 330 far from the first light-shielding sheet 310 is called the second second light-shielding sheet 330b, as Figure 5As shown in the figure, the thickness of the first second light-shielding sheet 330a is set as t1, the thickness of the second second light-shielding sheet 330b is set as t2, the vertical distance between the first light-shielding sheet 310 and the first second light-shielding sheet 330a is k1, and the vertical distance between the first second light-shielding sheet 330a and the second second light-shielding sheet 330b is k2. The assembly jig 200 for assembling the first second light-shielding sheet 330a and the bracket 350 can be as shown in Fig. 21(a), and the assembly jig 200 for assembling the second second light-shielding sheet 330b and the bracket 350 can be as shown in Fig. 21(b). Among them, Fig. 21(a) is a schematic front sectional view of the assembly jig for assembling the bracket and the first second light-shielding sheet in the embodiment of the present disclosure, and Fig. 21(b) is a schematic front sectional view of the assembly jig for assembling the bracket and the second second light-shielding sheet in the embodiment of the present disclosure.

[0185] As shown in Fig. 21(a), for the assembly jig 200 for assembling the first second light-shielding sheet 330a and the bracket 350, the distance D between the first bearing plane and the second bearing plane in the height direction Z is D = T + a preset distance ΔD = T + k1, or D = t1 + a preset distance ΔD = t1 + k1. That is, ΔD = k1.

[0186] When D = T + k1, T ≤ d1, and k1 ≥ d2. When using the assembly jig 200 designed in this way to assemble the first second light-shielding sheet 330a and the bracket 350, the bracket 350 is placed on the first stage 210, and the first second light-shielding sheet 330a is placed on the second bearing plane. When the assembly jig 200 further includes a second force-applying structure composed of a pressing block 240 and a first connecting portion 231, t1 = d3, so that the pressing block 240 can apply pressure to the first second light-shielding sheet 330a.

[0187] When D = t1 + k1, t1 ≤ d1, and k1 ≥ d2. When using the assembly jig 200 designed in this way to assemble the first second light-shielding sheet 330a and the bracket 350, the bracket 350 is placed on the second stage 220, and the first second light-shielding sheet 330a is placed on the first stage 210. When the assembly jig 200 further includes a second force-applying structure composed of a pressing block 240 and a first connecting portion 231, T = d3, so that the pressing block 240 can apply pressure to the first light-shielding sheet 310.

[0188] As shown in Fig. 21(b), for the assembly jig 200 for assembling the second second light-shielding sheet 330b and the bracket 350, the distance D between the first bearing plane and the second bearing plane in the height direction Z is D = T + a preset distance ΔD = T + k1 + t1 + k2, or D = t2 + k1 + t1 + k2. That is, ΔD = k1 + t1 + k2.

[0189] When D = T + k1 + t1 + k2, T + t1 + k1 ≤ d1, and k2 ≥ d2. When using the assembly fixture 200 designed in this way to assemble the next second light-shielding sheet 330b and the bracket 350, the bracket 350 is placed on the first carrier 210, and the next second light-shielding sheet 330b is placed on the second bearing plane. When the assembly fixture 200 further includes a second force-applying structure composed of a pressing block 240 and a first connecting portion 231, t2 = d3, so that the pressing block 240 can apply pressure to the next second light-shielding sheet 330b.

[0190] When D = t2 + k1 + t1 + k2, t2 + t1 + k2 ≤ d1, and k1 ≥ d2. When using the assembly fixture 200 designed in this way to assemble the next second light-shielding sheet 330b and the bracket 350, the bracket 350 is placed on the second carrier 220, and the next second light-shielding sheet 330b is placed on the first carrier 210. When the assembly fixture 200 further includes a second force-applying structure composed of a pressing block 240 and a first connecting portion 231, T = d3, so that the pressing block 240 can apply pressure to the first light-shielding sheet 310.

[0191] Figure 22 FIG. 21(a) is a schematic three-dimensional structure diagram of the assembly fixture applied to assembling the bracket and the first second light-shielding sheet. Figure 23 FIG. 21(a) is a schematic front cross-sectional view of the assembly fixture applied to assembling the bracket and the first second light-shielding sheet. Figure 24 FIG. 21(a) is a schematic side cross-sectional view of the assembly fixture applied to assembling the bracket and the first second light-shielding sheet. Figure 25 FIG. 21(b) is a schematic three-dimensional structure diagram of the assembly fixture applied to assembling the bracket and the next second light-shielding sheet. Figure 26 FIG. 21(b) is a schematic front cross-sectional view of the assembly fixture applied to assembling the bracket and the next second light-shielding sheet. Figure 27 FIG. 21(b) is a schematic side cross-sectional view of the assembly fixture applied to assembling the bracket and the next second light-shielding sheet.

[0192] Based on the content described above, please refer to Figures 22 to 27 , when assembling the light-shielding component 300 provided with two second light-shielding sheets 330, an exemplary specific implementation process of S20 includes the following steps.

[0193] Step 1, perform the assembly step to connect the first second light-shielding sheet 330a and the bracket 350; as Figures 22 to 24As shown, the assembly steps include: sub-step a, placing the first second light-shielding sheet 330a on the first bearing plane of the assembly fixture 200 shown in Fig. 21(a); sub-step b, placing the first light-shielding sheet 310 of the bracket 350 on the second bearing plane of the assembly fixture 200 shown in Fig. 21(a), and inserting the first second light-shielding sheet 330a onto the bracket 350; sub-step c, moving the pressing block 240 above the second stage 220 and aligning the second connecting portion 241 with the first connecting portion 231, connecting the first connecting portion 231 and the second connecting portion 241, pressing the pressing block 240 against the first light-shielding sheet 310, and applying pressure to the first light-shielding sheet 310 by the pressing block 240; sub-step d, using an air extraction device to extract air so that the first second light-shielding sheet 330a is subjected to a negative pressure; sub-step e, applying a liquid glue to the insertion connection between the bracket 350 and the first second light-shielding sheet 330a, and drying the liquid glue to form an adhesive layer 270, so that an adhesive layer 270 is formed by coating between the two ends of the first second light-shielding sheet 330a and the two connecting plates 320.

[0194] Step 2, detach and separate the second connecting portion 241 from the first connecting portion 231, and move the pressing block 240 upward; turn off the air extraction device; remove the whole assembled in Step 1 from the assembly fixture 200 shown in Fig. 21(a).

[0195] Step 3, perform the assembly steps so that the second second light-shielding sheet 330b is connected to the bracket 350; as Figures 25 to 27 shown, the assembly steps include: sub-step f, placing the second second light-shielding sheet 330b on the first bearing plane of the assembly fixture 200 shown in Fig. 21(b); sub-step g, placing the first light-shielding sheet 310 of the whole assembled in Step 1 on the second bearing plane of the assembly fixture 200 shown in Fig. 21(b), and inserting the second second light-shielding sheet 330b onto the bracket 350; sub-step h, moving the pressing block 240 above the second stage 220 and aligning the second connecting portion 241 with the first connecting portion 231, connecting the first connecting portion 231 and the second connecting portion 241, pressing the pressing block 240 against the first light-shielding sheet 310, and applying pressure to the first light-shielding sheet 310 by the pressing block 240; sub-step i, using an air extraction device to extract air so that the second second light-shielding sheet 330b is subjected to a negative pressure; sub-step j, applying a liquid glue to the insertion connection between the bracket 350 and the second second light-shielding sheet 330b, and drying the liquid glue to form an adhesive layer 270, so that an adhesive layer 270 is formed by coating between the two ends of the second second light-shielding sheet 330b and the two connecting plates 320.

[0196] Of course, the next second light-shielding sheet 330b and the bracket 350 can also be assembled and connected first, and then the first second light-shielding sheet 330a and the bracket 350 can be assembled and connected. That is to say, when the light-shielding assembly 300 is provided with a plurality of second light-shielding sheets 330, the assembly sequence of each second light-shielding sheet 330 and the bracket 350 is not restrictive, and the assembly jig 200 for assisting the assembly of each second light-shielding sheet 330 and the bracket 350 can be customized according to the actual working conditions.

[0197] Based on the content described above, for the light-shielding assembly 300 provided with a plurality of second light-shielding sheets 330 (i.e., the number of main light-shielding sheets exceeds two), the assembly jig 200 of this embodiment can be used to assist in the assembly, so as to ensure the relative position accuracy between any second light-shielding sheet 330 and the first light-shielding sheet 310, and further ensure the installation accuracy of the assembled light-shielding assembly 300. The assembled light-shielding assembly 300 not only has high installation accuracy, but also, since the number of structural members (i.e., the connecting plate 320) does not increase with the total number of the first light-shielding sheet 310 and the second light-shielding sheet 330, the light-shielding assembly 300 can be prevented from occupying too much installation space.

[0198] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present invention, and the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims

1. A light-shielding component, applied to a lidar, characterized in that Comprising: A bracket, including a first light-shielding sheet and two connecting plates oppositely arranged along a first direction, both ends of the first light-shielding sheet are fixedly connected to the two connecting plates respectively, and at least one connecting position is provided on each connecting plate; And At least one second light-shielding sheet, each second light-shielding sheet corresponds to a connecting position on the connecting plate, both ends of the second light-shielding sheet are assembled and connected to the corresponding connecting positions on the two connecting plates respectively, the first light-shielding sheet and the second light-shielding sheet are parallel to each other and arranged at intervals along a second direction, the second direction is perpendicular to the first direction and parallel to the thickness direction of the first light-shielding sheet.

2. The light-shielding component according to claim 1, wherein, The first light-shielding sheet and the two connecting plates are integrally formed.

3. The light-shielding component according to claim 1, wherein The connecting position includes a slot extending along a third direction, both ends of the second light-shielding sheet are inserted and connected to the corresponding slots on the two connecting plates respectively; wherein, the third direction is perpendicular to the first direction and the second direction.

4. The light-shielding component according to claim 3, characterized in that The opening of the slot penetrates one end face of the corresponding connecting plate along the third direction, and plugging plates are protrudingly arranged on both sides of the second light-shielding sheet along the first direction, and the two plugging plates on the second light-shielding sheet are respectively inserted and matched with the slots on the two connecting plates one by one.

5. The light-shielding component according to claim 4, wherein A cantilever plate is protrudingly arranged at the front end of the plugging plate close to the tail of the slot, and a plugging gap is formed between the cantilever plate and the side surface of the second light-shielding sheet, and the plugging gap is inserted and matched with the corresponding connecting plate.

6. The light-shielding component according to claim 1, wherein An adhesive layer is provided between both ends of the second light-shielding sheet and the two connecting plates, and the second light-shielding sheet and the bracket are also adhesively connected through the adhesive layer.

7. The light-shielding component according to any one of claims 1 to 6, characterized in that, The first light-shielding sheet and all the second light-shielding sheets are main light-shielding sheets, and the main light-shielding sheet has a front surface and a back surface arranged oppositely along its thickness direction, and the front surface is used for facing the return light of the non-preset echo direction; The main light-shielding sheet has a first end and a second end along the third direction, the first end is used for approaching the receiving device of the lidar, and the third direction is perpendicular to the first direction and the second direction; The first light-shielding sheet is located on the front side of all the second light-shielding sheets; And / or, the second end of any main light-shielding sheet protrudes from the second ends of the remaining main light-shielding sheets on the front side of the main light-shielding sheet.

8. The light-shielding component according to claim 7, characterized in that It further includes a side light-shielding sheet, and the side light-shielding sheet is located on the front side of all the main light-shielding sheets; along the second direction, the first end of the first main light-shielding sheet arranged in a stacked manner is turned and connected to the side light-shielding sheet and integrally formed.

9. The light-shielding component according to claim 8, wherein, A plurality of reinforcing ribs are provided between the first main light-shielding sheet arranged in a stacked manner and the side light-shielding sheet.

10. A lidar, characterized in that, Comprising: A transmitting device for emitting outgoing light; A receiving device for receiving the return light returned by the target object; And The light-shielding component according to any one of claims 1 to 9, the light-shielding component is arranged close to the receiving device, the first light-shielding sheet and all the second light-shielding sheets of the light-shielding component are main light-shielding sheets, the main light-shielding sheet is parallel to the preset echo direction, and the main light-shielding sheet can block the return light of the non-preset echo direction.

11. The lidar according to claim 10, wherein, It further includes a filter and a beam splitter; The filter is fixedly connected to the receiving device. The filter can cut off the unnecessary wavelength bands of the return light, and the thickness direction of the filter is parallel to the preset return light direction. The light-shielding component and the beam splitter are both arranged on the side of the filter facing away from the receiving device, and the beam splitter is located between the light-shielding component and the transmitting device; the light-shielding component is fixedly connected to the filter. The beam splitter has a reflective surface and a backlight surface. The reflective surface is arranged facing the transmitting device and is used for reflecting the outgoing light emitted by the transmitting device, and reflecting the outgoing light emitted along the first light-emitting direction to be emitted along the second light-emitting direction; the backlight surface is arranged facing the filter.

12. An assembly fixture is applied to the assembly of the light-shielding component according to any one of claims 1 to 9, and is characterized in that The assembly jig includes: A first stage, the top surface of the first stage is a first bearing plane; and A second stage, arranged above the first stage and opposite to the first stage; the surface of the second stage facing away from the first stage is a second bearing plane, and one of the first bearing plane and the second bearing plane is used for placing the first light-shielding sheet, and the other is used for placing a second light-shielding sheet; along the vertical direction, the distance between the second bearing plane and the first bearing plane is equal to the sum of the thickness of the light-shielding sheet correspondingly borne by the first bearing plane and a preset distance, and the preset distance is equal to the distance between the first light-shielding sheet and the second light-shielding sheet in the vertical direction; the height of the second stage in the vertical direction is less than or equal to the distance between the first light-shielding sheet and any second light-shielding sheet in the vertical direction.

13. A method for assembling a light-shielding component, applied to the assembly jig described in claim 12, characterized in that, The assembly method includes: Providing a bracket and a second light-shielding sheet; When the light-shielding component includes one second light-shielding sheet, performing an assembly step once; When the light-shielding component includes multiple second light-shielding sheets, performing multiple assembly steps in sequence until all the second light-shielding sheets are connected to the bracket; The assembly step includes: placing one of the first light-shielding sheet of the bracket and a second light-shielding sheet on the first bearing plane and the other on the second bearing plane, and assembling and connecting the two ends of the second light-shielding sheet to the corresponding connection positions on the two connecting plates of the bracket.

14. The assembly method according to claim 13, characterized in that, The assembly step further includes: applying a vertically downward external force to the light-shielding sheet correspondingly borne by the first bearing plane and the light-shielding sheet correspondingly borne by the second bearing plane.

15. The assembly method according to claim 13, characterized in that, The assembly step further includes: Coating an adhesive layer between the two ends of the second light-shielding sheet and the two connecting plates.

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