Laser radar wedge-shaped rotary scanning motor equipment
By setting a balance block in the rotor assembly of the lidar rotary prism scanning motor equipment to counterweight the wedge mirror and using the positioning structure of the lens barrel to position the wedge mirror, the problems of motor imbalance and high noise in the prior art are solved, and higher scanning accuracy and lower production costs are achieved.
Patent Information
- Application Number
- CN202421725109.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-19
AI Technical Summary
The existing lidar rotary prism scanning motor equipment is difficult to achieve fine adjustment of the wedge mirror during the production process, resulting in unbalanced motors, high noise and high cost.
By providing balance blocks in the rotor assembly of the motor, the wedge mirror is positioned axially and radially in combination with the positioning structure of the lens barrel, reducing the imbalance and noise of the motor, and simplifying the structure to reduce costs.
It effectively reduces the imbalance and noise of the motor, improves scanning accuracy, and reduces production costs.
Smart Images
Figure CN222802676U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of laser radar motors, in particular to a laser radar wedge-shaped rotating scanning motor device. Background Art
[0002] Rotating prism motor equipment has a wide range of uses in the field of precision optoelectronic tracking, and can achieve high-precision optical tracking, scanning, expansion of camera field of view, optical obstacle avoidance, and laser communication.
[0003] In the existing laser radar rotating prism scanning motor equipment, the shape of the lens barrel is directly set to match the wedge mirror, so as to adjust the imbalance of the wedge mirror during operation. However, due to process limitations, different wedge mirrors are allowed to have a certain deviation. By setting the shape of the lens barrel to match the wedge mirror, if the lens barrel is mass-produced, it is impossible to adjust the imbalance for a specific wedge mirror, which leads to a large motor imbalance, noisy sound, and inability to achieve motor refinement; if the lens barrel is designed separately for different wedge mirrors, the lens barrel loses its versatility and increases the cost; the upper end of the bearing in the above technical solution has no limit, which may cause the bearing to loosen when the motor rotates, affecting the use of the motor; and the function of the rotor assembly is generally achieved by a combination of a rotor, a steel ring (usually a magnetic conductive material) and a magnetic steel, which not only makes the product bulky, but also makes the process complicated and the cost of the motor high. Utility Model Content
[0004] In order to overcome at least one of the defects of the above-mentioned prior art, the utility model provides a laser radar wedge-shaped rotating scanning motor device, which counterweights the wedge mirror by setting a balancing block, thereby reducing the imbalance, noise and production cost of the motor and improving the scanning accuracy.
[0005] The technical solution adopted by the utility model to solve the problem is:
[0006] A laser radar wedge-shaped rotary scanning motor device, comprising:
[0007] at least one electric motor;
[0008] The motor includes a stator assembly and a rotor assembly, and the rotor assembly is rotatably arranged relative to the stator assembly;
[0009] The rotor assembly comprises a wedge mirror and a balancing block, and the balancing block is connected to the wedge mirror.
[0010] In a preferred embodiment, the rotor assembly also includes a lens barrel, the interior of the lens barrel has an installation cavity, the lens barrel is provided with a first positioning portion at the lower portion of the installation cavity, the wedge mirror is installed in the installation cavity of the lens barrel, and the wedge mirror is supported on the first positioning portion, and the first positioning portion is used to position the wedge mirror axially.
[0011] In a preferred embodiment, the lens barrel is further provided with a second positioning portion at the lower part of the mounting cavity thereof, the second positioning portion is arranged beside the wedge mirror, and the second positioning portion is used for positioning the wedge mirror in the radial direction.
[0012] In a preferred embodiment, the first positioning portion is in the shape of an annular strip, and the second positioning portion is in the shape of a semicircular column.
[0013] In a preferred embodiment, the wedge mirror has a relatively high portion and a relatively low portion, and the balance weight is disposed near the relatively low portion of the wedge mirror.
[0014] In a preferred embodiment, the rotor assembly further comprises a magnetic ring, which is sleeved on the outer side of the upper portion of the lens barrel.
[0015] In a preferred embodiment, the motor further comprises a bearing, and the bearing is arranged between the stator assembly and the rotor assembly;
[0016] The stator assembly includes a stator unit and a base. The base is provided with a first positioning step for positioning the lower part of the bearing. The outer side of the lens barrel is provided with a second positioning step for positioning the upper part of the bearing.
[0017] In a preferred embodiment, the stator assembly has a mounting cavity inside, and the rotor assembly is arranged in the mounting cavity of the stator assembly.
[0018] In a preferred embodiment, the motor further comprises a code disc, which is arranged below the rotor assembly and is connected to the rotor assembly.
[0019] In a preferred embodiment, the laser radar wedge-shaped rotary scanning motor device includes two motors, which are sequentially stacked in the axial direction and connected to each other.
[0020] In summary, the utility model has the following technical effects: the utility model counterweights the wedge mirror by arranging a balancing block, which is beneficial to reducing the imbalance, noise and production cost of the motor and improving the scanning accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the utility model from a first viewing angle;
[0022] Figure 2 A second perspective schematic diagram of the overall structure of an embodiment of the utility model;
[0023] Figure 3 For the utility model embodiment Figure 1 Schematic diagram of the decomposition structure;
[0024] Figure 4 For the utility model embodiment Figure 3 A further decomposition structure diagram of
[0025] Figure 5 For the utility model embodiment Figure 1 Schematic diagram of the internal structure;
[0026] Figure 6 This is a schematic diagram of the structure of a wedge mirror according to an embodiment of the utility model;
[0027] Figure 7 It is a schematic structural diagram of the lens barrel of an embodiment of the utility model.
[0028] The meanings of the reference numerals are as follows:
[0029] 10. Motor, 101. Stator assembly, 1011. Stator unit, 1012. Machine base, 1013. First positioning step, 102. Rotor assembly, 1021. Wedge mirror, 1022. Balance block, 1023. Lens barrel, 1024. First positioning portion, 1025. Second positioning portion, 1026. Installation gap, 1027. Magnetic ring, 1028. Second positioning step, 103. Bearing, 104. Code disk. DETAILED DESCRIPTION
[0030] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0031] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.
[0033] See also Figure 1-Figure 7The utility model discloses a laser radar wedge-shaped rotary scanning motor device, comprising: at least one motor 10; the motor 10 comprises a stator assembly 101 and a rotor assembly 102, and the rotor assembly 102 is rotatably arranged relative to the stator assembly 101; the rotor assembly 102 comprises a wedge mirror 1021 and a balancing block 1022, and the balancing block 1022 is connected to the wedge mirror 1021.
[0034] The utility model provides a balancing block 1022 to counterweight the wedge mirror 1021 , which is beneficial to reducing the unbalance, noise and production cost of the motor 10 and improving the scanning accuracy.
[0035] In the embodiment of the utility model, the rotor assembly 102 also includes a lens barrel 1023, the interior of the lens barrel 1023 has an installation cavity, the lens barrel 1023 is provided with a first positioning portion 1024 at the lower part of the installation cavity, the wedge mirror 1021 is installed in the installation cavity of the lens barrel 1023, and the wedge mirror 1021 is supported on the first positioning portion 1024, and the first positioning portion 1024 is used to position the wedge mirror 1021 in the axial direction.
[0036] In the embodiment of the utility model, the lens barrel 1023 is further provided with a second positioning portion 1025 at the lower part of its installation cavity. The second positioning portion 1025 is arranged beside the wedge mirror 1021 , and is used to position the wedge mirror 1021 in the radial direction.
[0037] In the embodiment of the present invention, the first positioning portion 1024 is in the shape of an annular strip, and the second positioning portion 1025 is in the shape of a semicircular column.
[0038] Specifically, the lens barrel 1023 is in the shape of a sleeve as a whole, the first positioning portion 1024 is in the shape of an unclosed ring, and the second positioning portion 1025 is arranged at the notch of the first positioning portion 1024, so as to facilitate the axial and radial positioning of the wedge mirror 1021. The first positioning portion 1024 can prevent the wedge mirror 1021 from moving downward relative to the lens barrel 1023, and the second positioning portion 1025 can prevent the wedge mirror 1021 from rotating relative to the lens barrel 1023, so as to provide installation stability for the wedge mirror 1021. After the wedge mirror 1021 is axially positioned by the first positioning portion 1024 and radially positioned by the second positioning portion 1025, the wedge mirror 1021 and the lens barrel 1023 can be fixedly connected by adhesive.
[0039] It should be noted that the first positioning portion 1024 and the second positioning portion 1025 can be made integrally with the lens barrel 1023; the first positioning portion 1024, the second positioning portion 1025 and the lens barrel 1023 can also be made separately, and the first positioning portion 1024 and the second positioning portion 1025 are connected to the lens barrel 1023 as a whole by means of adhesive connection, welding or clamping, that is, the first positioning portion 1024 and the second positioning portion 1025 follow the lens barrel 1023 to rotate relative to the stator assembly 101.
[0040] In the embodiment of the present invention, the wedge mirror 1021 has a relatively high portion and a relatively low portion, and the balance block 1022 is disposed close to the relatively low portion of the wedge mirror 1021 .
[0041] In this way, the balancing block 1022 is disposed close to the relatively lower part of the wedge mirror 1021 , which is beneficial for balancing the wedge mirror 1021 , thereby adjusting the unbalanced amount of the motor 10 .
[0042] Preferably, there is an installation gap 1026 between the balancing weight 1022 and the inner side wall of the lens barrel 1023 in the radial direction, so as to facilitate the assembly of the balancing weight 1022 .
[0043] Specifically, the axial cross-section of the wedge mirror 1021 is wedge-shaped, the bottom of the wedge mirror 1021 is a plane, the top of the wedge mirror 1021 is an inclined surface, one end of the top of the wedge mirror 1021 is higher than the other end of the top of the wedge mirror 1021, and the second positioning portion 1025 is arranged close to the relatively low part of the wedge mirror 1021.
[0044] Preferably, the side of the balancing block 1022 facing the second positioning portion 1025 is flush with the side of the wedge mirror 1021 facing the second positioning portion 1025; that is, the balancing block 1022 is set at the lowest position of the top of the wedge mirror 1021, and the balancing block 1022 is set at the edge of the wedge mirror 1021.
[0045] More specifically, after calculating according to the wedge mirror 1021 to be installed and obtaining the matching balancing block 1022 for the specific wedge mirror 1021, the bottom of the balancing block 1022 is abutted against the top of the wedge mirror 1021, and the two ends of the balancing block 1022 are abutted against the inner wall of the lens barrel 1023. The bottom of the balancing block 1022 is an inclined surface, and the two ends of the balancing block 1022 are arc-shaped. The balancing block 1022 is fixedly connected with the wedge mirror 1021 and the lens barrel 1023 by gluing. In this way, the balancing block 1022 cooperates with the first positioning portion 1024 to realize the axial positioning of the wedge mirror 1021, so as to prevent the wedge mirror 1021 from moving up and down relative to the lens barrel 1023, and further improve the assembly stability of the wedge mirror 1021.
[0046] It should be noted that the wedge mirror 1021 can adopt an existing wedge prism. The selected wedge prism is based on the ability to realize the operation of the laser radar wedge rotary scanning motor device. Its refractive working surface is close to the central axis position of the wedge mirror 1021. The balance block 1022 is set at the edge position of the wedge mirror 1021. The size and shape of the balance block 1022 are based on not affecting the refraction of the wedge mirror 1021.
[0047] In the embodiment of the utility model, the rotor assembly 102 further includes a magnetic ring 1027 , and the magnetic ring 1027 is sleeved on the outer side of the upper part of the lens barrel 1023 .
[0048] It should be noted that the magnetic ring 1027 and the lens barrel 1023 are made separately, and there is a clearance fit between the magnetic ring 1027 and the lens barrel 1023 and they are connected as a whole by adhesive, or the magnetic ring 1027 is connected as a whole with the lens barrel 1023 by a tight fit, so that the magnetic ring 1027 and the lens barrel 1023 can rotate together relative to the stator assembly 101.
[0049] In this way, the magnetic ring 1027 is used to replace the steel ring and magnetic steel structure in the prior art, which simplifies the structure and process, facilitates assembly, and reduces production costs.
[0050] In an embodiment of the utility model, the motor 10 also includes a bearing 103, which is arranged between the stator assembly 101 and the rotor assembly 102; the stator assembly 101 includes a stator unit 1011 and a base 1012, and the base 1012 is provided with a first positioning step 1013, and the first positioning step 1013 is used to position the lower part of the bearing 103, and a second positioning step 1028 is provided on the outer side of the lens barrel 1023, and the second positioning step 1028 is used to position the upper part of the bearing 103.
[0051] Specifically, the stator unit 1011 is fixed on the machine base 1012 .
[0052] More specifically, a first positioning step 1013 is provided on the machine base 1012, and a second positioning step 1028 is provided on the lens barrel 1023; of course, the first positioning step 1013 and the second positioning step 1028 can also be formed by separately manufactured accessories, wherein the accessory forming the first positioning step 1013 is connected to the machine base 1012 by means of gluing, welding, and clamping, and the accessory forming the second positioning step 1028 is connected to the lens barrel 1023 by means of gluing, welding, and clamping.
[0053] It should be noted that the bearing 103 can be a ball bearing. The bearing 103 includes a rotating inner ring and a fixed outer ring. The rotating inner ring is fixedly connected to the lens barrel 1023, and the fixed outer ring is fixedly connected to the base 1012. The bearing 103 is used to assist the rotor assembly 102 to rotate relative to the stator assembly 101, thereby improving the smoothness of the rotation of the rotor assembly 102 relative to the stator assembly 101.
[0054] In the embodiment of the present utility model, the stator assembly 101 has an installation cavity inside, and the rotor assembly 102 is disposed in the installation cavity of the stator assembly 101 .
[0055] Specifically, the stator assembly 101 includes a stator core and a stator winding, the stator unit 1011 is arranged in a ring shape, and the stator unit 1011, the base 1012, the lens barrel 1023 and the wedge lens 1021 are coaxially arranged.
[0056] Specifically, there is a space between the stator unit 1011 and the rotor assembly 102 to prevent the stator unit 1011 from interfering with the rotation of the rotor assembly 102 .
[0057] In the embodiment of the present invention, the motor 10 further includes a code disc 104 . The code disc 104 is disposed below the rotor assembly 102 , and the code disc 104 is connected to the rotor assembly 102 .
[0058] It should be noted that the code disk 104 (encoding disk) refers to a digital encoder for measuring angular displacement, and is the most commonly used displacement sensor for measuring the angular position of a shaft. How to use the code disk 104 can be carried out using existing technology and will not be repeated here.
[0059] In an embodiment of the utility model, the laser radar wedge-shaped rotary scanning motor device includes two motors 10, the two motors 10 are sequentially stacked in the axial direction, and the two motors 10 are connected to each other.
[0060] Specifically, the stator assemblies 101 of the two motors 10 are assembled by screws so that the two motors 10 can be used in conjunction with each other.
[0061] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.
Claims
1. A laser radar wedge-shaped rotary scanning motor device, characterized in that: include: at least one electric motor; The motor comprises a stator assembly and a rotor assembly, wherein the rotor assembly is rotatably arranged relative to the stator assembly; The rotor assembly includes a wedge mirror and a balancing block, and the balancing block is connected to the wedge mirror.
2. The laser radar wedge-shaped rotary scanning motor device according to claim 1, characterized in that: The rotor assembly also includes a lens barrel, the interior of the lens barrel has an installation cavity, the lens barrel is provided with a first positioning portion at the lower portion of the installation cavity, the wedge mirror is installed in the installation cavity of the lens barrel, and the wedge mirror is supported on the first positioning portion, and the first positioning portion is used to position the wedge mirror in the axial direction.
3. The laser radar wedge-shaped rotary scanning motor device according to claim 2, characterized in that: The lens barrel is further provided with a second positioning portion at the lower part of the mounting cavity thereof. The second positioning portion is arranged beside the wedge mirror and is used for positioning the wedge mirror in the radial direction.
4. The laser radar wedge-shaped rotary scanning motor device according to claim 3 is characterized in that: The first positioning portion is in the shape of an annular strip, and the second positioning portion is in the shape of a semicircular column.
5. The laser radar wedge-shaped rotary scanning motor device according to claim 1, characterized in that: The wedge mirror has a relatively high portion and a relatively low portion, and the balance weight is arranged close to the relatively low portion of the wedge mirror.
6. The laser radar wedge-shaped rotary scanning motor device according to claim 2, characterized in that: The rotor assembly also includes a magnetic ring, which is sleeved on the outer side of the upper part of the lens barrel.
7. The laser radar wedge-shaped rotary scanning motor device according to claim 2, characterized in that: The motor further comprises a bearing, wherein the bearing is arranged between the stator assembly and the rotor assembly; The stator assembly includes a stator unit and a base, the base is provided with a first positioning step, the first positioning step is used to position the lower part of the bearing, and the outer side of the lens barrel is provided with a second positioning step, the second positioning step is used to position the upper part of the bearing.
8. The laser radar wedge-shaped rotary scanning motor device according to any one of claims 1 to 7, characterized in that: The stator assembly has an installation cavity inside, and the rotor assembly is arranged in the installation cavity of the stator assembly.
9. The laser radar wedge-shaped rotary scanning motor device according to any one of claims 1 to 7, characterized in that: The motor further includes a code disc, which is disposed below the rotor assembly and is connected to the rotor assembly.
10. The laser radar wedge-shaped rotary scanning motor device according to any one of claims 1 to 7, characterized in that: The invention comprises two motors, which are sequentially stacked in the axial direction and connected to each other.