feat: P03肩吊臂增加前置止脱锁紧法兰与P04肩叉加长避让 (解决螺丝拉脱问题与零干涉)

docs/bom.json

@@ -21,23 +21,23 @@
  },
  {
   "件号": "P03_肩吊臂",
-  "名称": "肩关节基座机壳（高刚性规整风道散热版）",
+  "名称": "肩关节安装悬臂（高强多肋+前置电机锁紧法兰版）",
   "类型": "3D打印",
   "数量": 1,
-  "体积cm3": 745.3,
-  "质量g_PLA": 924.2,
-  "包络": "[-148.0 91.0 455.0 .. 2.0 165.0 647.0] (150.0x74.0x192.0)",
-  "说明": "V2浑然一体散热版：Ø73mm机舱+7组轴向散热格栅+PCBA对流窗+一体化顺滑斜挑立柱"
+  "体积cm3": 759.4,
+  "质量g_PLA": 941.7,
+  "包络": "[-148.0 91.0 455.0 .. 8.5 165.0 647.0] (156.5x74.0x192.0)",
+  "说明": "高强多肋机架：10mm后置法兰+双侧8mm大三角加强筋+下腹12mm抗弯龙骨筋+前向电机全包托架与前置止脱锁紧法兰(4xM3止脱螺孔)+双侧大散热窗与对流槽"
  },
  {
   "件号": "P04_肩叉",
-  "名称": "肩叉（深度圆角版：顶部凸台R=8mm圆弧+圆盘边缘R=10mm）",
+  "名称": "肩叉（加长避让顺滑流线版）",
   "类型": "3D打印",
   "数量": 1,
-  "体积cm3": 347.3,
-  "质量g_PLA": 430.7,
+  "体积cm3": 357.2,
+  "质量g_PLA": 442.9,
   "包络": "[-16.5 90.0 455.0 .. 53.5 166.0 648.0] (70.0x76.0x193.0)",
-  "说明": "V2圆角：顶部方形突起改为R=8mm圆弧过渡，圆盘边缘R=10mm大圆角；散热腔顶板改为与前后安装环同一R=35圆柱凹弧（J2轴心），腔体保持敞开散热"
+  "说明": "加长避让版：头部与身子前移加长至X=10.5，与P03锁紧法兰保持2.0mm轴向安全间隙，顶部顺滑齐平于Z=648mm，单实体全角度零干涉"
  },
  {
   "件号": "P05_大臂旋转座",
@@ -51,13 +51,13 @@
  },
  {
   "件号": "P06_大臂骨架",
-  "名称": "大臂骨架（平整版+前侧圆形过渡：顶部R10.5圆弧卷入）",
+  "名称": "大臂骨架（Loft圆弧转方有机过渡版）",
   "类型": "3D打印",
   "数量": 1,
-  "体积cm3": 182.9,
-  "质量g_PLA": 226.8,
-  "包络": "[-16.5 91.8 297.0 .. 53.5 163.0 390.1] (70.0x71.2x93.1)",
-  "说明": "平整版：XZ两侧竖直直面，前侧上段竖直面+R10.5圆形过渡（净空P07立柱带3mm，J4不再卡死），电机散热腔+M4/J3接口"
+  "体积cm3": 169.3,
+  "质量g_PLA": 210.0,
+  "包络": "[-16.5 88.8 297.0 .. 53.5 167.2 390.1] (70.0x78.4x93.1)",
+  "说明": "Loft有机过渡版：借鉴P05圆弧变方形放样算法，顶端Ø70正圆与J3平齐无台阶，底端渐变融入M4抱紧套筒与壳体，单实体0干涉"
  },
  {
   "件号": "P07_小臂骨架",