电动打草机线头飞溅伤脚问题

terrywong

广东安规检测
有限公司提供：

小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

我们一款打草机,在国外遭投诉, 原因是打草线自动切断后,线头飞出,打疼用户的脚趾头.
/ y6 C& X  _0 u% x2 N$ s问题产品在国外, 看不到, 我觉得原因是如下两点, 请各位帮忙分析对不对:

第一, 护罩尺寸及角度不对, 参见IEC 60335-2-91, 20.101.1
4 x) R3 I5 W, |9 |) N& e% ^6 v20.101.1 Lawn trimmers
- w+ ~9 A0 u3 d% w; m3 {Lawn trimmers shall be guarded on the operator’s side, as a minimum, to the extent shown
in Figure 101.
9 W" F) e% ?, U& L( kThe radius X of the guard shall not be smaller than the major swept radius of the cutting
+ s9 x/ u* `5 |1 v& N+ W' w1 Vhead and the guard shall extend beyond the plane of the cutting element by at least 3 mm
for walk-behind lawn trimmers and 10 mm for hand-held lawn trimmers. The guard shall
$ I5 R; U/ H6 x+ J* Uextend at least 45° from the axis of the handle on the side where the cutting element is
) ?% z& I5 }' x5 N5 W! w9 Zmoving away from the operator and at least 90° from the axis of the handle on the side where
the cutting element is moving towards the operator. The vertices of these angles lie on the
6 l1 _: |1 V0 o( \  m; |* v; Gaxis of the cutting head spindle.
If the guarding is less than a total of 360°, the direction of rotation of the cutting element(s)
) p% d' V7 o2 f/ \; d+ G' Y0 ~! Rshall be marked on the lawn trimmer.
Compliance is checked by inspection and measurement.

第二, 飞出线头动能太大. 参见 IEC 60335-2-91, 22.103
22.103 A cutting element shall have a kinetic energy of not more than 10 J.
Compliance is checked by inspection, measurement and test. Polyamide cutting elements
- B" l1 U& {9 o, ware stored for at least seven days in a humidity cabinet under the same conditions as those
0 ^9 M7 S) e& Grequired for the test of 15.3 before carrying out the test and measurement.
9 T. Y, G6 Z* sFor the purposes of this standard, the kinetic energy shall be determined by means of the
1 B9 x( X! O- H( Qfollowing formula:
% Q) M8 q: n: W( F% h$ z2 vkinetic energy = ½ mv2 (J)
! I  o8 j# U7 J/ u" Y  g3 Gwhere
% h# N% `8 r) S# G; }m is the mass of the length L of the cutting element, in kilograms (see Figure 105);
v is the maximum attainable velocity of point Z which is half-way along the length L of the
; S! A6 D6 E" s0 fcutting element, in metres per second.
Therefore: v = 0,1047 n ( r– (L/2))
where
n is the maximum rotational speed with a full length of line or a new cutter fitted, in
revolutions per minute;
: h8 R: o- M& {" cr is the distance from the axis of rotation of the cutting head to the outer tip of the cutting
means, in metres;
L is the measured length of the cutting element, in metres.
" m3 r. Q5 j. J, {: C  x

noangelrain

关键你们认证的这不满足 ，是如何拿到证书的

terrywong

CE-LVD/MD 测试都通过, 也拿到了某机构的GS证书.  但还是有投诉, 证书的严肃性我们暂且不谈, 只想单纯谈论问题, 和解决问题的方法. 不知道我的上述分析对不对, 如果对, 可否告知解决方案, 请各位不吝指教. 谢谢啦

lianhuatang

认证的产品也不能肯定解决实际使用中的可能遭遇。
5 }6 t& k1 Q( V/ l7 O! ^" F7 B确定是纯的尼龙线吧？直径应该在2.3mm以内吧？

kongyezi

是的可能的，护罩导向问题，以及客户如何操作是否手持方向不对？？

zjfxw

这种现象偶然比较大吧，

kgdihcel123

没看到贵司产品的护罩图片，也不能给出准确的信息：
# s$ V7 O3 b5 E1 T* X7 @, i4 v  S1.防护罩是否存在变形，防护角度是否符合要求，4.6.2（附录2a、2b） 4.6.3（附录 3a、3b），因为护罩变形了，它的底部防护就有可能不密实，尼龙线会飞出来的。
/ @+ M! q! ^' ?2.客户操作的方向是否正确