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.
# ?# M# c: @) U; ?" M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:
  w3 S6 ^% }9 E7 w
  t. v8 Q, B: w8 P( F第一, 护罩尺寸及角度不对, 参见IEC 60335-2-91, 20.101.1
20.101.1 Lawn trimmers
( c' Q8 F8 }$ e! }: NLawn trimmers shall be guarded on the operator’s side, as a minimum, to the extent shown
. J& Z' F0 N( G: f0 {# Rin Figure 101.
8 [/ S: c) R1 F" d. fThe radius X of the guard shall not be smaller than the major swept radius of the cutting
9 w4 w' Z1 [$ C/ _head 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
* r/ F2 ]# }0 z! N! C7 Kextend at least 45° from the axis of the handle on the side where the cutting element is
1 ]' X; N3 y$ L0 u3 b+ \0 |. }moving 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 A# X+ G' ]% n. a3 X2 Uaxis of the cutting head spindle.
If the guarding is less than a total of 360°, the direction of rotation of the cutting element(s)
shall be marked on the lawn trimmer.
0 t' n6 c2 i2 q4 [0 ICompliance is checked by inspection and measurement.
! [% S; H; y: m/ L, \+ |; I% u
4 ]- Z  h7 y% O5 M第二, 飞出线头动能太大. 参见 IEC 60335-2-91, 22.103
7 @% V( S3 B1 B22.103 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
( A2 W0 @3 d, d( d/ s  hare stored for at least seven days in a humidity cabinet under the same conditions as those
; x& }) F! p  m! E2 E; p7 [required for the test of 15.3 before carrying out the test and measurement.
3 Q3 K5 V1 A* b) j7 O5 c* FFor the purposes of this standard, the kinetic energy shall be determined by means of the
following formula:
- P- B9 R1 G. Qkinetic energy = ½ mv2 (J)
where
m is the mass of the length L of the cutting element, in kilograms (see Figure 105);
4 ^# k! ^% G2 e! T! vv is the maximum attainable velocity of point Z which is half-way along the length L of the
$ a; D. o; l* l7 scutting element, in metres per second.
0 N5 E) C- J$ {3 NTherefore: v = 0,1047 n ( r– (L/2))
! K# Z$ d7 g" l; j- p8 G# M# Xwhere
n is the maximum rotational speed with a full length of line or a new cutter fitted, in
7 X6 A% u# J: L& i5 Zrevolutions per minute;
+ O1 k  ^( a  ^( |/ b$ vr 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.
  N! h# i$ M+ G( r$ I. a" M
/ j  F. i, [& G1 P

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。
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：
( {- n% p+ H  a1.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。
2.客户操作的方向是否正确