球形关节 GoPro 桌面支架
一根夹在桌边、用标准三爪接口固定 GoPro 的相机支臂。弧形 C 形夹、渐细的支臂和相机头作为一块平板一起打印,两个球形关节已经在球窝里。每个球与球窝之间都有一圈均匀的小间隙,球窝唇边包过球的最宽处,所以能转能倾,却不会脱出。夹子一端的球向桌外倾出,每个关节可向任意方向倾斜约 29 度并能整圈旋转,因此支臂向外伸出约 45 度时,相机头仍能保持相机水平。每个关节用一颗 M4 螺丝夹紧开口球窝来锁定姿态。校验证明球打印出来是活动的且不会脱出,算出每个关节倾斜到颈部碰到唇边前的角度,证明夹子转角和球颈能有余量地承受载荷,螺丝提供的夹紧力约为相机所需的四倍,夹子适合 15 到 45 mm 厚的桌板。

Building the model
Loading the 3D view
No adjustable sizes
Ask for the sizes you want to tweak, e.g. “make the width adjustable”.
默认尺寸下的规格
在 Bambu Lab A1 上用 pla 实际构建测得。拖动上方滑块时,每个数字都会实时更新。
- 整体尺寸
- 148 × 34 × 294 mm
- 零件数
- 5
- 耗材
- 73 g
- 打印时间
- 2 h 3 min
- 打印盘
- 2
- 支撑
- 不需要
工程校验
校验和参数名称直接来自 CAD 引擎,以英文显示。
- Flare runs into the head blockthe flare grows to 15.6 mm across, 1.5 mm inside the block's rounded edge, and enters the cup with 0.0 mm of straight neck showing
- Ball captured past the equatorsocket wraps 37 deg past the equator; opening 19.6 mm vs ball 24 mm (21.6 mm across the flats, so even panned 90 deg there is 1.0 mm of lip); pulling either joint 1.15 mm out hits the lip
- Joints print free0.35 mm surface gap all round each ball; 1.01 mm between ball and socket at the bed
- Tilt cone at the clamp jointfree to 29 deg in all four directions (0.00/0.00/0.00/0.00 mm3); the neck meets the lip by 33/33/33/33 deg; pan unlimited
- Tilt cone at the camera jointhead swings 29 deg each way on the arm (0.00/0.00/0.00/0.00 mm3)
- Aiming pose cleararm leans 45 deg out over the desk (stud 25 + joint 20), camera level and facing forward; each joint at 20 of 30 deg
- Ball neck takes a bump14.9 MPa in the 8.6 mm neck with the arm at its widest reach (55 deg from vertical), camera bumped (x2, root Kt 1.67); PLA allows 16.7 along the layers
- Pinch screw holds the pose1.23 N m of friction from an M4 snugged to 0.4 N m vs 0.28 N m from the camera and arm at widest reach (x4.4); slit 1.2 mm closes 0.70 mm to grip
- Clamp corners carry the bolt13.2 MPa inside the 7 mm corner bends (curved beam x1.70, measured sections 22 / 22 mm) at 313 N from a 0.5 N m knob twist; PLA allows 16.7 along the layers
- Clamp will not rock on the desk5.3 N m of jaw grip vs 0.95 N m from the arm sticking straight out, bumped
- Fits desks 15-45 mmM8 x 80: at 15 mm the knob sits 12 mm under the jaw, at 45 mm the pad clears the jaw by 3 mm; throat 54 mm
- GoPro fingers fit the prongs3 prongs 3 mm thick with 3.1 mm gaps (15.2 mm stack), M5 bore, nut pocket in the outer prong
- Thumb screw goes throughM5 thumb screw from the left into the captured nut
- Prints in one goclamp, arm and head lie flat in a 219 mm square turned 21 deg on the 256 mm bed, 21.6 mm tall
- Pad and knob sit on the boltpad pressed on the bolt tip against the desk underside, knob on the bolt head 22 mm under the jaw
- camera arm stays together after printingall 3 bodies are captive: none can be pulled out along any axis
- camera arm is held firmlyevery captive body is held by at least 0.8 mm (two perimeters)
- GoPro goes in35 poses along its path clear of every part.
- thumb screw goes in20 poses along its path clear of every part.
- M8 nut goes in20 poses along its path clear of every part.
- M4 x 16 pinch screw 1 goes in15 poses along its path clear of every part.
- M4 x 16 pinch screw 2 goes in15 poses along its path clear of every part.
可调尺寸
| 设置 | 默认 | 范围 |
|---|---|---|
| Arm length (ball to ball) | 140 mm | 100–150 mm |
| Desk thickness | 25 mm | 15–45 mm |
| Ball diameter | 24 mm | 20–28 mm |
| Joint gap (each side) | 0.35 mm | 0.3–0.45 mm |
零件清单
| 零件 | 数量 | 尺寸(mm) | 耗材 | 时间 |
|---|---|---|---|---|
| clamp | 1 | 95 × 133 × 22 | 34 g | 50 min |
| arm | 1 | 156 × 89 × 22 | 24 g | 38 min |
| camera head | 1 | 40 × 53 × 22 | 8 g | 17 min |
| clamp pad | 1 | 26 × 26 × 6 | 2 g | 7 min |
| clamp knob | 1 | 34 × 34 × 14 | 5 g | 12 min |
制作方法
- 设置桌板厚度和想要的臂长,再选球径:球越大,能倾斜得稍远一些,夹得也更紧。
- 支臂背面朝下一次打印,无需支撑,再打印旋钮和垫片。除非测试件太紧或太松,关节间隙保持 0.35 mm。
- 用力拧一下让每个球松开,装上两套 M4 螺丝和螺母,把 M8 螺栓头压进旋钮,把 M8 螺母压进夹子的槽里(构建结果会给出螺栓长度,默认尺寸为 M8 x 80)。
- 夹到桌边,用手拧螺丝把 GoPro 的卡爪插进三爪接口,对准方向,再拧紧 M4 螺丝锁定姿态。
打印建议
- 关闭支撑:支撑材料会打进关节间隙,把球粘死。
- PLA 或 PETG、3 层壁效果很好;用光面 PEI 板并检查第一层,第一层压扁是球粘在球窝上最常见的原因。
- 如果松开后关节发紧,装相机前把每个关节在全行程内来回活动几次。
常见问题
装上 GoPro 会下垂吗?
只要拧紧 M4 夹紧螺丝就不会。校验显示,支臂伸到最远时,摩擦力约为固定 GoPro 所需的四倍。螺丝松开时关节可以自由活动,就是这样来调方向的。
能用来夹手机吗?
末端是标准 GoPro 三爪接口,所以任何带 GoPro 卡爪的手机夹都能装上。本设计不包含手机夹本身。
需要哪些五金件?
夹子用一套 M8 螺栓和螺母(默认尺寸为 M8 x 80),关节用两套 M4 螺丝和螺母(默认尺寸为 M4 x 16),相机用一颗 GoPro 手拧螺丝和一个 M5 螺母。构建结果会按你的滑块给出准确长度。
需要目录里没有的形状? 用文字生成 CAD,用你自己的话描述它
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