Outer rotor motor for laser radar, prism motor and laser radar

Abstract

The utility model provides an external rotor motor for a laser radar, a prism motor and the laser radar, and relates to the technical field of laser radars. The external rotor motor for the laser radar comprises a bottom plate, a stator assembly and an external rotor assembly. The bottom plate is provided with a mounting boss. The stator assembly is provided with an installation groove matched with the installation boss, and the installation boss is installed in the installation groove so that the stator assembly can be installed on the bottom plate. The outer rotor assembly is rotatably connected with the stator assembly and is correspondingly arranged on the outer side of the stator assembly. The problem that a fixed shaft of a stator is inclined after being used for a period of time can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of laser radar, and in particular to an outer rotor motor for laser radar, a prism motor and a laser radar. Background Art

[0002] In order to improve the detection range of the laser radar, the existing technology adds a prism motor to the laser radar, and uses an outer rotor motor to drive the prism to rotate, thereby improving the detection range of the laser radar;

[0003] However, since the laser radar has a high requirement for the rotation speed of the prism and the addition of a prism, the existing outer rotor motor used to connect the outer rotor fixed shaft will tilt relative to the base plate after a period of use, and the outer rotor connected to the fixed shaft will also tilt with the prism as the fixed shaft tilts. When tilted, the prism will affect the optical performance of the laser radar.

[0004] Therefore, how to improve or avoid the problem that the fixed shaft of the stator may tilt after being used for a period of time has become a technical problem that needs to be solved urgently in the art. Utility Model Content

[0005] The purpose of the utility model is to provide an outer rotor motor, a prism motor and a laser radar for a laser radar, which can improve the problem that the fixed axis of the stator will tilt after being used for a period of time.

[0006] The embodiment of the utility model is achieved as follows:

[0007] In a first aspect, the utility model provides an outer rotor motor for a laser radar, comprising a base plate, a stator assembly and an outer rotor assembly;

[0008] The bottom plate is provided with a mounting boss;

[0009] The stator assembly is provided with a mounting groove that cooperates with the mounting boss, and the mounting boss is mounted in the mounting groove so that the stator assembly is mounted on the base plate;

[0010] The outer rotor assembly is rotatably connected to the stator assembly and is correspondingly arranged on the outer side of the stator assembly.

[0011] In an optional embodiment, the stator assembly includes a fixed shaft and a stator fixedly connected to the fixed shaft;

[0012] The mounting groove is arranged at the bottom end of the fixed shaft;

[0013] The outer rotor assembly is rotatably mounted on the fixed shaft and is covered on the outer side of the stator.

[0014] In an optional embodiment, the fixed shaft is integral, and includes a first section, a second section, and a third section connected in sequence, the diameter of the first section is B1, the diameter of the second section is B2, the diameter of the third section is B3, and B1, B2, and B3 satisfy B1>B2>B3;

[0015] The mounting groove is arranged at an end of the first section away from the second section;

[0016] The stator is mounted on the second section and fixedly connected to the second section;

[0017] The outer rotor assembly is rotatably mounted on the third section.

[0018] In an optional implementation manner, the B1 and the B3 also satisfy 3*B3≤B1.

[0019] In an optional embodiment, the length of the first segment is L1, the length of the second segment is L2, the length of the third segment is L3, and L1, L2 and L3 satisfy L3>L2>L1.

[0020] In an optional implementation, the L1 and the L2 also satisfy L1>0.5*L2.

[0021] In an optional embodiment, a wire outlet notch is provided on one side of the bottom plate where the mounting boss is provided, and one end of the wire outlet notch passes through one side of the bottom plate;

[0022] The diameter of the stator is S1, and B3 and S1 satisfy B1≤0.95*S1;

[0023] The outer rotor motor for the laser radar further includes a stator lead wire, one end of which is electrically connected to the stator, and the other end of which extends from the outer side of the first section into the lead-out notch and out of the bottom plate; and / or,

[0024] The B1 and the S1 satisfy S1 / B1=1.15.

[0025] In an optional embodiment, the mounting boss is cylindrical, the mounting groove is in the shape of a circular hole, the diameter of the mounting boss is D1, the diameter of the mounting groove is B4, and D1, B4 and B3 satisfy that the largest of D1 and B4 is greater than or equal to B3;

[0026] and / or,

[0027] The height of the mounting boss is H2, the depth of the mounting groove is H1, and H1, H2 and B1 satisfy H2≤H1≤B1.

[0028] In an optional embodiment, the outer rotor motor for laser radar further includes a plurality of fasteners;

[0029] The bottom plate is provided with a plurality of mounting holes at the periphery of the mounting boss, and the mounting holes all penetrate the bottom plate;

[0030] The fixed shaft is located at the periphery of the mounting groove and is provided with a plurality of fixing holes corresponding to the mounting holes;

[0031] The fastener is sequentially inserted into the mounting hole and the fixing hole to fix the fixing shaft to the base plate.

[0032] In an optional embodiment, the mounting hole is a countersunk hole, the fixing hole is a threaded hole, the fastener is a screw, and the head of the screw can be sunk in the countersunk hole.

[0033] In an optional implementation, the diameter of the fixing hole is M1, and M1 and L1 satisfy M1<L1<1.5*M1.

[0034] In an alternative embodiment, L1 = 1.25 * M1.

[0035] In an optional embodiment, a mounting groove is recessed on the top surface of the base plate, and a plurality of annular steps are provided at the end of the fixed shaft corresponding to the plurality of mounting holes, and the end surfaces of the plurality of annular steps abut against the bottom surface of the mounting groove.

[0036] In an optional embodiment, a reinforcing rib is convexly provided on the bottom surface of the mounting groove, and the height of the reinforcing rib is less than the depth of the mounting groove;

[0037] The height between the bottom surface of the assembly groove and the bottom surface of the bottom plate is greater than the height of the reinforcing rib; and / or the height between the bottom surface of the assembly groove and the bottom surface of the bottom plate is less than the diameter of the third section.

[0038] In an optional embodiment, a plurality of the ring platforms are spaced apart to form an avoidance gap, and the reinforcing ribs extend into the avoidance gap.

[0039] In an optional embodiment, the end of the mounting boss is provided with a chamfer.

[0040] In an optional embodiment, the outer rotor motor for the laser radar further includes a detection circuit board, which is installed in the assembly slot and is used to detect the rotation speed and position of the outer rotor assembly.

[0041] In an optional embodiment, a plurality of mounting feet are provided on the bottom surface of the base plate, and the bottom surfaces of the plurality of mounting feet form a mounting reference surface;

[0042] The installation reference surface and the bottom surface of the base plate are offset in height direction.

[0043] In an optional embodiment, the rotor assembly includes a rotor housing, a rotor magnet and a bearing;

[0044] The rotor shell comprises an upper shell part and a lower shell part connected to each other, the rotor magnet is installed in the lower shell part, and the bearing is arranged in the upper shell part;

[0045] The bearing is installed on the third section, and the rotor is correspondingly arranged outside the stator;

[0046] The diameter of the upper shell portion is smaller than the diameter of the lower shell portion.

[0047] In a second aspect, the utility model provides a prism motor, comprising a prism and an outer rotor motor for a laser radar as described in any one of the aforementioned embodiments;

[0048] The prism is fixedly connected to the outer rotor assembly, and the outer rotor assembly can drive the prism to rotate.

[0049] In a third aspect, the utility model provides a laser radar, including a shell, a receiving module, a transmitting module and the prism motor described in the aforementioned embodiment.

[0050] The receiving module and the transmitting module are arranged in the housing, and the bottom plate is connected to the housing;

[0051] The light beam emitted by the emission module can be reflected by the prism to the detection target;

[0052] The light beam reflected by the detection target can be reflected to the receiving module through the prism.

[0053] The beneficial effects of the outer rotor motor, prism motor and laser radar provided by the embodiment of the utility model include:

[0054] This application sets a mounting boss on the bottom plate and a mounting groove on the stator assembly. By embedding the mounting boss in the mounting groove, the two have stronger rigidity and greater bonding force, which can improve the optical effect of the laser radar caused by the stator assembly tilting relative to the bottom plate after the laser radar has been used for a period of time. Secondly, the combination of the mounting boss and the mounting groove can make it easier to assemble the stator assembly with the bottom plate, and can ensure the verticality of the stator assembly and the bottom plate when installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0056] Figure 1 A schematic cross-sectional view of an outer rotor motor for a laser radar provided in an embodiment of the utility model;

[0057] Figure 2 A schematic cross-sectional view of a stator assembly of an outer rotor motor for a laser radar provided in an embodiment of the utility model;

[0058] Figure 3 A schematic diagram of the structure of a fixed shaft of an outer rotor motor for a laser radar provided in an embodiment of the utility model;

[0059] Figure 4 A schematic diagram of the end surface structure of a fixed shaft of an outer rotor motor for a laser radar provided in an embodiment of the utility model;

[0060] Figure 5 A schematic diagram of the cross-sectional structure of the base plate of an outer rotor motor for a laser radar provided in an embodiment of the utility model.

[0061] Icons: 100 - external rotor motor; 110 - base plate; 111 - mounting boss; 113 - wire notch; 115 - mounting hole; 117 - assembly slot; 119 - reinforcing rib; 121 - mounting foot; 123 - mounting reference surface; 130 - stator assembly; 131 - mounting slot; 133 - fixed shaft; 135 - stator; 137 - first section; 139 - second section; 141 - third section; 143 - fixed hole; 145 - ring; 147 - avoidance gap; 149 - retaining ring slot; 150 - external rotor assembly; 151 - rotor shell; 153 - rotor magnet; 155 - bearing; 157 - upper part of the shell; 159 - lower part of the shell; 161 - retaining ring; 171 - stator lead wire; 173 - fastener; 175 - detection circuit board. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0063] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0064] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0065] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0066] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0067] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] Example

[0069] The present embodiment provides a laser radar, which includes a housing, a receiving module, a transmitting module and a prism motor. The receiving module, the transmitting module and the prism motor are arranged in the housing, and the prism motor is arranged on the transmitting light path and the receiving light path of the receiving module and the transmitting module. The light beam emitted by the transmitting module can be reflected to the detection target through the prism. The light beam reflected by the detection target can be reflected to the receiving module through the prism. The laser radar provided in this embodiment can increase the detection range of the laser radar by adding a prism motor. The laser radar can be applied to automobiles to realize automatic driving or assisted driving, thereby improving the safety of the automobile.

[0070] Of course, in some embodiments of the present application, the laser radar also includes a galvanometer module, which is also arranged in the transmitting optical path and the receiving optical path, and the galvanometer can be pitched in the vertical direction. The prism motor can drive the prism to rotate in the horizontal direction. In this way, the light beam reflected by the reflection module is reflected to the prism through the galvanometer, and then reflected by the prism so that it can shine on the obstacle. The reflected light beam of the obstacle can be irradiated on the prism, reflected to the galvanometer by the prism, and then reflected by the galvanometer so that it can be received by the receiving module. In this way, the use of the galvanometer can increase the detection range of the laser radar in the vertical direction, and the use of the prism can increase the detection range of the laser radar in the horizontal direction.

[0071] Please refer to Figure 1 In this embodiment, the prism motor includes a prism and an outer rotor motor 100 for a laser radar. Generally, the prism is hollow, and is sleeved on the outside of the outer rotor motor 100, and is fixedly connected to the outer rotor assembly 150 of the outer rotor motor 100, so that the prism can be driven to rotate by the outer rotor motor 100. By sleeve-mounting the prism on the outside of the outer rotor motor 100, the height of the prism motor can be reduced, thereby lowering the center of gravity, and improving the problem of the stator 135 tilting.

[0072] Please refer to Figures 1 to 5 In this embodiment, the outer rotor motor 100 for laser radar includes a base plate 110, a stator assembly 130 and an outer rotor assembly 150. The base plate 110 is provided with a mounting boss 111. The stator assembly 130 is provided with a mounting groove 131 that matches the mounting boss 111, and the mounting boss 111 is installed in the mounting groove 131, so that the stator assembly 130 is installed on the base plate 110. The outer rotor assembly 150 is rotatably connected to the stator assembly 130 and is correspondingly arranged on the outer side of the stator assembly 130.

[0073] The present application sets a mounting boss 111 on the bottom plate 110 and a mounting groove 131 on the stator assembly 130. By fitting the mounting boss 111 into the mounting groove 131, the two have stronger rigidity and greater bonding force, which can improve the problem that the stator assembly 130 tilts relative to the bottom plate 110 after the laser radar has been used for a period of time, affecting the optical effect of the laser radar. Secondly, the combination of the mounting boss 111 and the mounting groove 131 can make it easier to assemble the stator assembly 130 with the bottom plate 110, and can ensure the verticality of the stator assembly 130 and the bottom plate 110 when they are installed.

[0074] In this embodiment, the bottom plate 110 is roughly in a quadrilateral structure, and can be made of metal materials such as stainless steel, zinc alloy, aluminum, aluminum and gold, and is generally made of aluminum or aluminum alloy to reduce weight.

[0075] Please refer to Figures 1 to 5 In this embodiment, the stator assembly 130 includes a fixed shaft 133 and a stator 135 fixedly connected to the fixed shaft 133. The mounting groove 131 is provided at the bottom end of the fixed shaft 133. The outer rotor assembly 150 is rotatably mounted on the fixed shaft 133 and is covered on the outer side of the stator 135.

[0076] The mounting groove 131 is arranged on the fixed shaft 133 , so that the stator 135 and the outer rotor assembly 150 are both mounted on the fixed shaft 133 , and the outer rotor assembly 150 will not be tilted when the fixed shaft 133 is not tilted.

[0077] Generally, the fixed shaft 133 is a stepped shaft and can be made of stainless steel, aluminum, zinc alloy, or aluminum alloy.

[0078] Furthermore, the fixed shaft 133 is made of stainless steel, which has high hardness and is not easily deformed or bent, so it will not tilt.

[0079] In this embodiment, the outer rotor motor 100 for the laser radar also includes a plurality of fasteners 173. A plurality of mounting holes 115 are arranged on the periphery of the mounting boss 111 of the base plate 110, and the mounting holes 115 all pass through the base plate 110. A plurality of fixing holes 143 corresponding to the mounting holes 115 are arranged on the periphery of the mounting groove 131 of the fixed shaft 133. The fasteners 173 are sequentially passed through the mounting holes 115 and the fixing holes 143 to fix the fixed shaft 133 to the base plate 110.

[0080] The fastener 173 further fixes the fixed shaft 133 and the bottom plate 110, which can improve the bonding force and make the fixed shaft 133 installed more firmly.

[0081] Please refer to Figures 1 to 5In this embodiment, the mounting hole 115 is a countersunk hole, the fixing hole 143 is a threaded hole, and the fastener 173 is a screw, and the head of the screw can be sunk in the countersunk hole. The countersunk hole allows the head of the screw to be inside, so as not to affect the installation of other components.

[0082] In this embodiment, the fixed shaft is an integrated one, and the fixed shaft 133 includes a first section 137, a second section 139, and a third section 141 connected in sequence, the diameter of the first section 137 is B1, the diameter of the second section 139 is B2, and the diameter of the third section 141 is B3, and B1, B2, and B3 satisfy B1>B2>B3. The mounting groove 131 is provided at one end of the first section 137 away from the second section 139. The stator 135 is mounted on the second section 139 and fixedly connected to the second section 139. The outer rotor assembly 150 is rotatably mounted on the third section 141. In this way, the center of gravity of the fixed shaft 133 can be moved downward, and the center of gravity of the outer rotor motor 100 can be moved downward.

[0083] In this embodiment, B1 and B3 also satisfy 3*B3≤B1. This allows the center of gravity of the fixed shaft 133 to move downward, thereby allowing the center of gravity of the outer rotor motor 100 to move downward. In addition, larger screws can be selected to increase the bonding force.

[0084] Please refer to Figures 1 to 5 In this embodiment, the length of the first section 137 is L1, the length of the second section 139 is L2, and the length of the third section 141 is L3, and L1, L2 and L3 satisfy L3>L2>L1. The length relationship is set in this way because the third section 141 needs to be equipped with two bearings 155, so that the outer rotor motor 100 can be more compact.

[0085] In this embodiment, L1 and L2 also satisfy L1>0.5*L2. Since the stator 135 is fixed to the second section 139, the fixed shaft 133 can be more stable.

[0086] In this embodiment, the stator 135 has a coil, and a wire outlet notch 113 is provided on one side of the bottom plate 110 where the mounting boss 111 is provided, and one end of the wire outlet notch 113 passes through one side of the bottom plate 110. The diameter of the stator 135 is S1, and B1 and S1 satisfy B1≤0.95*S1. The outer rotor motor 100 for the laser radar also includes a stator lead wire 171, one end of which is electrically connected to the stator 135, and the other end extends from the outside of the first section 137 into the wire outlet notch 113 and extends out of the bottom plate 110. This makes it easier for the stator lead wire 171 to pass through.

[0087] Please refer to Figures 1 to 5 In this embodiment, B1 and S1 satisfy S1 / B1=1.15. This allows the overall center of gravity of the outer rotor motor 100 to move downward, thereby improving stability.

[0088] In this embodiment, the mounting boss 111 is cylindrical, the mounting groove 131 is a circular hole, the diameter of the mounting boss 111 is D1, the diameter of the mounting groove 131 is B4, and D1, B4 and B3 satisfy that the largest one of D1 and B4 is greater than or equal to B3. This can prevent the mounting boss 111 from breaking or cracking at the junction with the bottom plate 110.

[0089] In some embodiments of the present application, the mounting boss 111 and the mounting groove 131 may be fitted by interference fit or clearance fit. In the case of interference fit, D1 is slightly larger than B4. In the case of clearance fit, B4 is slightly larger than D1.

[0090] Secondly, in some other embodiments of the present application, the mounting boss 111 may also be a regular polygonal shape, and the mounting groove 131 may also be a corresponding regular polygonal groove.

[0091] Please refer to Figures 1 to 5 In this embodiment, the height of the mounting boss 111 is H2, the depth of the mounting groove 131 is H1, and H1, H2 and B3 satisfy H2≤H1≤B1. In terms of structural stability, this will make the fixed shaft 133 more stably installed.

[0092] In this embodiment, the diameter of the fixing hole 143 is M1, and M1 and L1 satisfy M1<L1<1.5*M1. This ensures that the effective length of the screw thread is greater than 1.25 times the diameter of the thread, but considering the processing error, it is set to 1.5 times, thereby forming more redundancy.

[0093] In this embodiment, L1 = 1.25 * M1. This ensures that the depth of the fixing hole 143 is greater than the diameter of the thread, thereby improving the bonding strength.

[0094] In this embodiment, the top surface of the bottom plate 110 is concavely provided with an assembly groove 117, and the end of the fixed shaft 133 is provided with a plurality of ring steps 145 corresponding to the plurality of mounting holes 115, and the end surfaces of the plurality of ring steps 145 abut against the bottom surface of the assembly groove 117. This can improve the stability of the assembly.

[0095] In this embodiment, a reinforcing rib 119 is convexly provided on the bottom surface of the mounting groove 131, and the height of the reinforcing rib 119 is less than the depth of the mounting groove 117. The height between the bottom surface of the mounting groove 117 and the bottom surface of the bottom plate 110 is greater than the height of the reinforcing rib 119. The height between the bottom surface of the mounting groove 117 and the bottom surface of the bottom plate 110 is less than the diameter of the third section 141. In this way, the bottom plate 110 can be made lighter while ensuring that the structural strength requirement is met.

[0096] Please refer to Figures 1 to 5In this embodiment, a plurality of annular platforms 145 are arranged at intervals to form an escape gap 147, and the reinforcing ribs 119 extend into the escape gap 147. In this way, the reinforcing ribs 119 can be continuous.

[0097] In this embodiment, a chamfer is provided at the end of the mounting boss 111. The chamfer can be provided so that the mounting boss 111 can be quickly inserted into the mounting groove 131.

[0098] In this embodiment, the outer rotor motor 100 for laser radar further includes a detection circuit board 175, which is installed in the assembly groove 117. The detection circuit board 175 is used to detect the rotation speed and position of the outer rotor assembly 150. The detection circuit board 175 is arranged in the assembly groove 117, so that the installation of the outer rotor assembly 150 will not be affected.

[0099] Specifically, the bottom wall of the assembly slot 117 is provided with a plurality of screw holes, and the detection circuit board 175 is fixed to the bottom plate 110 of the assembly slot 117 by screws. Generally, a Hall sensor is provided on the detection circuit board 175 to detect parameters such as speed and position.

[0100] In this embodiment, the bottom surface of the base plate 110 is provided with a plurality of mounting feet 121, and the bottom surfaces of the plurality of mounting feet 121 form a mounting reference surface 123. The mounting reference surface 123 is offset from the bottom surface of the base plate 110 in the height direction. The mounting reference surface 123 is offset from the bottom surface of the base plate 110 in the thickness direction of the base plate 110, so that during the processing, only the reference surface of the mounting feet 121 needs to be fine-machined, and the bottom surface of the base plate 110 does not need to be fine-machined. During installation, the base plate 110 is suspended and installed on the housing through several mounting feet 121, so that the problem of screw loosening can be reduced by vibration and the bottom surface of the base plate 110 can be prevented from affecting the installation accuracy.

[0101] Please refer to Figures 1 to 5 , wherein the mounting reference surface 123 is located at the center plane of the thickness of the bottom plate 110. Generally, a boss is provided on the housing, and the top surface of the boss abuts against the mounting reference surface 123, so that the bottom plate 110 can be suspended in the air and then fixed to the boss.

[0102] Furthermore, the plurality of mounting feet 121 are each provided with an assembly hole for fixing the outer rotor motor 100 to the housing of the laser radar.

[0103] In this embodiment, the rotor assembly 150 includes a rotor shell 151, a rotor magnet 153 and a bearing 155. The rotor shell 151 includes a connected upper shell portion 157 and a lower shell portion 159, the rotor magnet 153 is generally installed in the lower shell portion 159 by bonding, and the bearing 155 is arranged in the upper shell portion 157. The bearing 155 is installed in the third section 141, and the rotor magnet 153 is correspondingly arranged outside the stator 135. The diameter of the upper shell portion 157 is smaller than the diameter of the lower shell portion 159.

[0104] This moves the center of gravity of the outer rotor assembly 150 downward, thereby reducing the moment of inertia.

[0105] There are two bearings 155 , which are spaced apart from each other, and the outer rings of the two bearings 155 are both clamped to the inside of the housing upper part 157 , and the inner rings are clamped to the third section 141 of the fixed shaft 133 .

[0106] In this embodiment, the outer rotor motor 100 for the laser radar further includes a retaining ring 161, and the third section 141 is provided with a retaining ring groove 149, the retaining ring 161 is clamped in the retaining ring groove 149, and abuts against the outer side of the inner ring of the uppermost bearing 155 to prevent the bearing 155 from falling off. When the stator 135 is powered, the outer rotor assembly 150 can rotate under the action of the stator 135.

[0107] In summary, the working principles and beneficial effects of the outer rotor motor 100 for laser radar, the prism motor and the laser radar provided in this embodiment include:

[0108] In this embodiment, a mounting boss 111 is provided on the base plate 110, and a mounting groove 131 is provided on the stator assembly 130. By fitting the mounting boss 111 into the mounting groove 131, the two have stronger rigidity and greater bonding force, which can improve the problem that the stator assembly 130 tilts relative to the base plate 110 after the laser radar has been used for a period of time, affecting the optical effect of the laser radar. Secondly, the combination of the mounting boss 111 and the mounting groove 131 can make it easier to assemble the stator assembly 130 with the base plate 110, and can ensure the verticality of the stator assembly 130 and the base plate 110 when they are installed. Secondly, the structure is compact, the volume is small, and it is easy to produce and assemble.

[0109] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An outer rotor motor for laser radar, characterized in that: It comprises a base plate (110), a stator assembly (130) and an outer rotor assembly (150); The bottom plate (110) is provided with a mounting boss (111); The stator assembly (130) is provided with a mounting groove (131) that matches the mounting boss (111), and the mounting boss (111) is mounted in the mounting groove (131), so that the stator assembly (130) is mounted on the base plate (110); The outer rotor assembly (150) is rotatably connected to the stator assembly (130) and is correspondingly arranged on the outer side of the stator assembly (130).

2. The outer rotor motor for laser radar according to claim 1, characterized in that: The stator assembly (130) comprises a fixed shaft (133) and a stator (135) fixedly connected to the fixed shaft (133); The mounting groove (131) is arranged at the bottom end of the fixed shaft (133); The outer rotor assembly (150) is rotatably mounted on the fixed shaft (133) and is covered on the outside of the stator (135).

3. The outer rotor motor for laser radar according to claim 2, characterized in that: The fixed shaft (133) is of an integrated type, and comprises a first section (137), a second section (139) and a third section (141) connected in sequence, the first section (137) has a diameter of B1, the second section (139) has a diameter of B2, the third section (141) has a diameter of B3, and B1, B2 and B3 satisfy: B1>B2>B3; The mounting groove (131) is arranged at an end of the first section (137) away from the second section (139); The stator (135) is mounted on the second section (139) and is fixedly connected to the second section (139); The outer rotor assembly (150) is rotatably mounted on the third section (141).

4. The outer rotor motor for laser radar according to claim 3, characterized in that: The B1 and the B3 also satisfy: 3*B3≤B1.

5. The outer rotor motor for laser radar according to claim 3, characterized in that: The length of the first section (137) is L1, the length of the second section (139) is L2, the length of the third section (141) is L3, and L1, L2 and L3 satisfy: L3>L2>L1.

6. The outer rotor motor for laser radar according to claim 5, characterized in that: The L1 and the L2 also satisfy: L1>0.5*L2.

7. The outer rotor motor for laser radar according to claim 3, characterized in that: A wire outlet notch (113) is provided on one side of the bottom plate (110) where the mounting boss (111) is provided, and one end of the wire outlet notch (113) passes through one side of the bottom plate (110); The diameter of the stator (135) is S1, and B1 and S1 satisfy: B1≤0.95*S1; The outer rotor motor for the laser radar further comprises a stator lead wire (171), one end of the stator lead wire (171) is electrically connected to the stator (135), and the other end extends from the outer side of the first section (137) into the lead wire notch (113) and extends out of the bottom plate (110); and / or, The B1 and the S1 also satisfy: S1 / B1=1.

15.

8. The outer rotor motor for laser radar according to any one of claims 3 to 7, characterized in that: The mounting boss (111) is cylindrical, the mounting groove (131) is in the shape of a circular hole, the diameter of the mounting boss (111) is D1, the diameter of the mounting groove (131) is B4, and D1, B4 and B3 satisfy that the largest of D1 and B4 is greater than or equal to B3; and / or, The height of the mounting boss (111) is H2, the depth of the mounting groove (131) is H1, and H1, H2 and B1 satisfy: H2≤H1≤B1.

9. The outer rotor motor for laser radar according to any one of claims 3 to 7, characterized in that: The outer rotor motor for laser radar further comprises a plurality of fasteners (173); The bottom plate (110) is provided with a plurality of mounting holes (115) at the periphery of the mounting boss (111), and the mounting holes (115) all penetrate the bottom plate (110); The fixed shaft (133) is provided with a plurality of fixing holes (143) corresponding to the mounting holes (115) on the periphery of the mounting groove (131); The fastener (173) is sequentially inserted into the mounting hole (115) and the fixing hole (143) to fix the fixing shaft (133) to the bottom plate (110).

10. The outer rotor motor for laser radar according to claim 9, characterized in that: The mounting hole (115) is a countersunk hole, the fixing hole (143) is a threaded hole, and the fastener (173) is a screw, the head of which can be sunk in the countersunk hole.

11. The outer rotor motor for laser radar according to claim 9, characterized in that: The diameter of the fixing hole (143) is M1, and M1 and L1 satisfy: M1<L1<1.5*M1.

12. The outer rotor motor for laser radar according to claim 9, characterized in that: The L1 and the M1 also satisfy: L1 = 1.25 * M1.

13. The outer rotor motor for laser radar according to claim 9, characterized in that: The top surface of the bottom plate (110) is concavely provided with an assembly groove (117), and the end of the fixed shaft (133) is provided with a plurality of annular steps (145) corresponding to the plurality of mounting holes (115), and the end surfaces of the plurality of annular steps (145) are in contact with the bottom surface of the assembly groove (117).

14. The outer rotor motor for laser radar according to claim 13, characterized in that: A reinforcing rib (119) is convexly provided on the bottom surface of the installation groove (131), and the height of the reinforcing rib (119) is less than the depth of the assembly groove (117); The height between the bottom surface of the assembly groove (117) and the bottom surface of the bottom plate (110) is greater than the height of the reinforcing rib (119); and / or the height between the bottom surface of the assembly groove (117) and the bottom surface of the bottom plate (110) is less than the diameter of the third section (141).

15. The outer rotor motor for laser radar according to claim 14, characterized in that: The plurality of annular platforms (145) are arranged at intervals to form an avoidance gap (147), and the reinforcing ribs (119) extend into the avoidance gap (147).

16. The outer rotor motor for laser radar according to any one of claims 1 to 7, characterized in that: The end of the mounting boss (111) is provided with a chamfer.

17. The outer rotor motor for laser radar according to claim 13, characterized in that: The outer rotor motor for laser radar further comprises a detection circuit board (175), wherein the detection circuit board (175) is mounted in the assembly groove (117), and the detection circuit board (175) is used to detect the rotation speed and position of the outer rotor assembly (150).

18. The outer rotor motor for laser radar according to any one of claims 1 to 7, characterized in that: The bottom surface of the base plate (110) is provided with a plurality of mounting feet (121), and the bottom surfaces of the plurality of mounting feet (121) form a mounting reference surface (123); The installation reference surface (123) and the bottom surface of the bottom plate (110) are arranged offset in the height direction.

19. The outer rotor motor for laser radar according to any one of claims 3 to 7, characterized in that: The outer rotor assembly (150) includes a rotor shell (151), a rotor magnet (153) and a bearing (155); The rotor shell (151) comprises a connected upper shell part (157) and a lower shell part (159), the rotor magnet (153) is installed in the lower shell part (159), and the bearing (155) is arranged in the upper shell part (157); The bearing (155) is installed on the third section (141), and the rotor magnet (153) is correspondingly arranged outside the stator (135); The diameter of the upper shell portion (157) is smaller than the diameter of the lower shell portion (159).

20. A prism motor, characterized in that: A laser radar outer rotor motor comprising a prism and any one of claims 1 to 19; The prism is fixedly connected to the outer rotor assembly (150), and the outer rotor assembly (150) can drive the prism to rotate.

21. A laser radar, characterized in that: It comprises a housing, a receiving module, a transmitting module and the prism motor according to claim 20; The receiving module and the transmitting module are arranged in the housing, and the bottom plate (110) is connected to the housing; The light beam emitted by the emission module can be reflected by the prism to the detection target; The light beam reflected by the detection target can be reflected to the receiving module through the prism.

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