建立方向盘项目初始版本
This commit is contained in:
1
models/encoder_print_v1/BUILD_OK.txt
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1
models/encoder_print_v1/BUILD_OK.txt
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success
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||||
BIN
models/encoder_print_v1/EncoderAssembly_Fit.FCStd
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models/encoder_print_v1/EncoderAssembly_Fit.FCStd
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2832
models/encoder_print_v1/EncoderBracket.step
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2832
models/encoder_print_v1/EncoderBracket.step
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File diff suppressed because it is too large
Load Diff
BIN
models/encoder_print_v1/EncoderBracket.stl
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BIN
models/encoder_print_v1/EncoderBracket.stl
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models/encoder_print_v1/EncoderParts_Print.FCStd
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models/encoder_print_v1/EncoderParts_Print.FCStd
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391
models/encoder_print_v1/MagnetHolder.step
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391
models/encoder_print_v1/MagnetHolder.step
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ISO-10303-21;
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HEADER;
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FILE_DESCRIPTION(('FreeCAD Model'),'2;1');
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FILE_NAME('Open CASCADE Shape Model','2026-10-28T09:26:54',(''),(''),
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'Open CASCADE STEP processor 7.8','FreeCAD','Unknown');
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FILE_SCHEMA(('AUTOMOTIVE_DESIGN { 1 0 10303 214 1 1 1 1 }'));
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ENDSEC;
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129
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models/encoder_print_v1/Shim05.stl
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Normal file
129
models/encoder_print_v1/Shim10.step
Normal file
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|
||||
#76 = ORIENTED_EDGE('',*,*,#77,.F.);
|
||||
#77 = EDGE_CURVE('',#78,#78,#80,.T.);
|
||||
#78 = VERTEX_POINT('',#79);
|
||||
#79 = CARTESIAN_POINT('',(2.2,-5.388445916248E-16,0.));
|
||||
#80 = CIRCLE('',#81,2.2);
|
||||
#81 = AXIS2_PLACEMENT_3D('',#82,#83,#84);
|
||||
#82 = CARTESIAN_POINT('',(0.,0.,0.));
|
||||
#83 = DIRECTION('',(0.,0.,1.));
|
||||
#84 = DIRECTION('',(1.,0.,-0.));
|
||||
#85 = PLANE('',#86);
|
||||
#86 = AXIS2_PLACEMENT_3D('',#87,#88,#89);
|
||||
#87 = CARTESIAN_POINT('',(0.,0.,0.));
|
||||
#88 = DIRECTION('',(0.,0.,1.));
|
||||
#89 = DIRECTION('',(1.,0.,-0.));
|
||||
#90 = ADVANCED_FACE('',(#91),#102,.F.);
|
||||
#91 = FACE_BOUND('',#92,.F.);
|
||||
#92 = EDGE_LOOP('',(#93,#94,#100,#101));
|
||||
#93 = ORIENTED_EDGE('',*,*,#57,.F.);
|
||||
#94 = ORIENTED_EDGE('',*,*,#95,.F.);
|
||||
#95 = EDGE_CURVE('',#78,#58,#96,.T.);
|
||||
#96 = LINE('',#97,#98);
|
||||
#97 = CARTESIAN_POINT('',(2.2,-5.388445916248E-16,-1.E-02));
|
||||
#98 = VECTOR('',#99,1.);
|
||||
#99 = DIRECTION('',(0.,0.,1.));
|
||||
#100 = ORIENTED_EDGE('',*,*,#77,.T.);
|
||||
#101 = ORIENTED_EDGE('',*,*,#95,.T.);
|
||||
#102 = CYLINDRICAL_SURFACE('',#103,2.2);
|
||||
#103 = AXIS2_PLACEMENT_3D('',#104,#105,#106);
|
||||
#104 = CARTESIAN_POINT('',(0.,0.,-1.E-02));
|
||||
#105 = DIRECTION('',(0.,0.,1.));
|
||||
#106 = DIRECTION('',(1.,0.,-0.));
|
||||
#107 = ( GEOMETRIC_REPRESENTATION_CONTEXT(3)
|
||||
GLOBAL_UNCERTAINTY_ASSIGNED_CONTEXT((#111)) GLOBAL_UNIT_ASSIGNED_CONTEXT
|
||||
((#108,#109,#110)) REPRESENTATION_CONTEXT('Context #1',
|
||||
'3D Context with UNIT and UNCERTAINTY') );
|
||||
#108 = ( LENGTH_UNIT() NAMED_UNIT(*) SI_UNIT(.MILLI.,.METRE.) );
|
||||
#109 = ( NAMED_UNIT(*) PLANE_ANGLE_UNIT() SI_UNIT($,.RADIAN.) );
|
||||
#110 = ( NAMED_UNIT(*) SI_UNIT($,.STERADIAN.) SOLID_ANGLE_UNIT() );
|
||||
#111 = UNCERTAINTY_MEASURE_WITH_UNIT(LENGTH_MEASURE(1.E-07),#108,
|
||||
'distance_accuracy_value','confusion accuracy');
|
||||
#112 = PRODUCT_RELATED_PRODUCT_CATEGORY('part',$,(#7));
|
||||
ENDSEC;
|
||||
END-ISO-10303-21;
|
||||
BIN
models/encoder_print_v1/Shim10.stl
Normal file
BIN
models/encoder_print_v1/Shim10.stl
Normal file
Binary file not shown.
BIN
models/encoder_print_v1/assembly.png
Normal file
BIN
models/encoder_print_v1/assembly.png
Normal file
Binary file not shown.
|
After Width: | Height: | Size: 83 KiB |
9
models/encoder_print_v1/geometry_check.txt
Normal file
9
models/encoder_print_v1/geometry_check.txt
Normal file
@@ -0,0 +1,9 @@
|
||||
magnet_holder 0.000000 mm3
|
||||
holder_bracket 0.000000 mm3
|
||||
magnet_bracket 0.000000 mm3
|
||||
chip_magnet 0.000000 mm3
|
||||
board_bracket 0.000000 mm3
|
||||
holder_M2head_1 0.000000 mm3
|
||||
holder_M2head_2 0.000000 mm3
|
||||
holder_M2head_3 0.000000 mm3
|
||||
Nominal chip-face-to-magnet-face gap: 1 mm
|
||||
4
models/encoder_print_v1/mesh_check.txt
Normal file
4
models/encoder_print_v1/mesh_check.txt
Normal file
@@ -0,0 +1,4 @@
|
||||
MagnetHolder solid=True facets=612 volume=2717.41382 ZMin=0.00000 ZMax=7.50000
|
||||
EncoderBracket solid=True facets=9628 volume=2575.82349 ZMin=-0.00000 ZMax=13.60000
|
||||
Shim05 solid=True facets=260 volume=24.12965 ZMin=0.00000 ZMax=0.50000
|
||||
Shim10 solid=True facets=260 volume=48.25929 ZMin=0.00000 ZMax=1.00000
|
||||
41
models/encoder_print_v1/打印与装配说明.md
Normal file
41
models/encoder_print_v1/打印与装配说明.md
Normal file
@@ -0,0 +1,41 @@
|
||||
# MT6826S 后置编码器：首版打印与装配
|
||||
|
||||
这是根据现有近似电机模型和圆板图制作的首版试装件。PCB 实际厚度、芯片突出高度、中心螺丝头直径及电机孔相位/孔深未实测，必须先试装，不能保证一次装配成功。
|
||||
|
||||
## 文件与打印数量
|
||||
|
||||
| STL | 用途 | 数量 |
|
||||
| --- | --- | --- |
|
||||
| `MagnetHolder.stl` | 磁铁座，电机轴平面侧向下打印 | 1 |
|
||||
| `EncoderBracket.stl` | 编码器支架，PCB 托环平面向下打印 | 1 |
|
||||
| `Shim05.stl` | 0.5 mm M4 间隙垫片 | 4 片或更多 |
|
||||
| `Shim10.stl` | 1 mm M4 间隙垫片 | 4 片或更多 |
|
||||
|
||||
STL 已调整到上述朝向，最低 Z 为 0。`EncoderParts_Print.FCStd` 是打印摆向零件文件，零件在同一坐标原点；按模型树分别选择对象导出。`EncoderAssembly_Fit.FCStd` 是 0.5 mm 垫片装配示意，原有电机模型未修改。各零件单独的 STEP 也可使用。可通过 `scripts/build_encoder_print_parts.py` 修改参数/重建；这些 FreeCAD 对象为实体特征，不是可直接在尺寸表内更改的参数化零件。
|
||||
|
||||
打印建议 PETG 等耐温材料、主件 0.2 mm 层高，至少 3 道外墙。支架倒置打印时四个 M4 耳在空中悬挑：切片中开启**从平台生成的支撑**，查看预览确保耳下可打印，打印后仔细移除支撑。0.5 mm 垫片可使用 0.1 mm 层高，使目标厚度对应整数层，并在切片预览中核对实际层数；垫片薄，留意实际厚度和翘曲。如果不易打印，可以使用相同厚度的 M4 非磁性平垫片。磁铁座槽口尺寸为 Ø10.3 mm，为 FDM 试配余量而不是保证的紧配合；打印机精度不同需要试配，磁铁应有可靠防脱固定，待验证后再固定。
|
||||
|
||||
## 规格和装配
|
||||
|
||||
- 磁铁座底面 Ø27×3 mm，上层 Ø20 mm，总高 7.5 mm；中心为 Ø3.3 mm M3 螺丝通孔。沉孔按螺丝头厚 2.2 mm、假设头直径不大于 7.2 mm 留余量，超过须修改模型。磁铁为 Ø10×3 mm 径向充磁，槽深 3 mm，侧边缺口供撬取。先插 M3 螺丝并装上另一端螺母锁紧，再放磁铁；两侧紧固和磁铁取出能否操作还需按实物确认。
|
||||
- PCB 直径按 33 mm，3 个 Ø3 mm 孔中心按图片；PCB 厚按 1.6 mm，芯片突出按 0.8 mm。支架用三个局部支承柱，以便在板背部留焊线空间；由于具体背部元件和焊盘未知，先试放并检查是否压住焊点或电线。
|
||||
- PCB 先在拆下的支架上固定，再将整个支架装到电机上。建议 **3 颗 M2×4 mm 小自攻螺丝**从芯片面穿过 PCB 原孔拧入打印支承柱的 Ø1.8 mm 导孔；螺丝头假设 Ø4 mm、高不超过 1.5 mm，且要覆盖 Ø3 mm 板孔。螺丝先轻拧，利用 M2 螺杆与 PCB 孔约 0.5 mm 的径向余量微调芯片中心，确认后轻轻锁紧，避免挤裂 PCB 和打印孔。实际螺钉形状、固位和布线需要试配；自攻孔太紧可轻微修孔，先勿强拧。
|
||||
- 支架用四颗 M4×8 固定，足部厚 2 mm。柱侧空间按 M4 螺丝头 Ø7 mm 计算，理论单侧间隙约 0.7 mm；请先试装螺丝和螺丝刀，较大螺丝头可能无法安装。50 mm 孔圈起始相位 45° 为原模型假设，不能保证与实物孔位一致。
|
||||
- 把磁铁座、支架分别固定在随转子转动的中心轴和电机固定部分。中心孔只有 M3 螺丝，磁铁座不会自动保证同轴；磁铁中心需对准芯片中心，并断电手动慢转数圈，检查没有蹭碰和轴向跳动。
|
||||
|
||||
## 怎样调整间隙
|
||||
|
||||
在**四个 M4 支架脚与电机平面之间**放完全相同厚度的垫片，避免 PCB 倾斜。增加垫片会把支架、PCB 和芯片一起向后移，使磁铁表面到芯片表面的间隙增大；减少垫片则减小间隙。按 PCB 厚 1.6 mm、芯片高 0.8 mm 的占位计算：
|
||||
|
||||
| 每个脚下垫片 | 计算间隙，仅为模型值 | M4×8 理论进入电机的长度 |
|
||||
| --- | --- | --- |
|
||||
| 无 | 0.5 mm | 6 mm |
|
||||
| 0.5 mm | 1.0 mm | 5.5 mm |
|
||||
| 1.0 mm | 1.5 mm | 5 mm |
|
||||
| 1.0 + 0.5 mm | 2.0 mm | 4.5 mm |
|
||||
|
||||
M4 进入长度按 `8 - 支架脚厚 2 - 垫片厚` 计算，未计电机端孔口形状。电机有效螺纹深度和所需咬合长度未确认，必须检查螺丝不会顶底、且有足够咬合；如果垫片较厚导致固定不牢，可换更长螺丝，但应先核对有效孔深。
|
||||
|
||||
首次建议每脚放一片 1.0 mm 垫片，从较大间隙开始，断电转动检查无碰擦后读取编码器角度及磁场状态；如需缩小间隙，再每脚统一改为 0.5 mm。上表是设计计算，不是实测；传感器表面与磁铁的真实间隙、磁铁同轴度和角度读数需现场确认。金属 M3 螺钉及电机轴可能影响磁场，实测不理想时再调整结构或紧固件。
|
||||
|
||||
`mesh_check.txt` 为重新加载 STL 后的 FreeCAD 网格闭合、体积和 Z 范围检查；`geometry_check.txt` 为简化示意装配的干涉检查。未做实物试装、电气、温升或旋转载荷测试。
|
||||
Reference in New Issue
Block a user