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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.: g6 S! G2 `, m+ y0 d8 b
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:
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8 w' r% T2 [& m* a第一, 护罩尺寸及角度不对, 参见IEC 60335-2-91, 20.101.16 p9 S8 x( }+ Z- k, _* @
20.101.1 Lawn trimmers* H* R6 w. u( h
Lawn trimmers shall be guarded on the operator’s side, as a minimum, to the extent shown4 n0 r! W) m: o, g( o" V
in Figure 101.
4 a, m/ T5 h; F7 W) lThe radius X of the guard shall not be smaller than the major swept radius of the cutting
4 ?" E' E8 f6 z8 ?3 x6 p4 d9 qhead and the guard shall extend beyond the plane of the cutting element by at least 3 mm
' ]$ r0 e4 T- o( vfor walk-behind lawn trimmers and 10 mm for hand-held lawn trimmers. The guard shall
, _1 h E! C; G' W6 ?$ f: d* Q }1 ?extend at least 45° from the axis of the handle on the side where the cutting element is
1 b$ ~2 e6 N- imoving away from the operator and at least 90° from the axis of the handle on the side where" ~5 u6 C, s9 Q: _
the cutting element is moving towards the operator. The vertices of these angles lie on the
+ \. ?( p" G1 _8 A4 \3 `axis of the cutting head spindle.
, H* d/ _1 w/ |! vIf the guarding is less than a total of 360°, the direction of rotation of the cutting element(s)$ [5 n, E: v- C& W
shall be marked on the lawn trimmer., ^" s' J8 `/ @! B4 m& m6 v
Compliance is checked by inspection and measurement.
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! D, P4 A) o8 ]( G/ Q, v第二, 飞出线头动能太大. 参见 IEC 60335-2-91, 22.103
R' m( {2 F& H) X$ I% r! J C22.103 A cutting element shall have a kinetic energy of not more than 10 J.' }/ c. E8 \& M$ [, E9 ]$ [- r2 O
Compliance is checked by inspection, measurement and test. Polyamide cutting elements
" r0 t: ]" Q: V$ P: ]/ F3 ~) \are stored for at least seven days in a humidity cabinet under the same conditions as those3 S% y. k. @2 K; q
required for the test of 15.3 before carrying out the test and measurement.% S0 e) H. [% f* R
For the purposes of this standard, the kinetic energy shall be determined by means of the a; Z4 G7 F2 C
following formula:
2 a) r0 ^5 R0 a% l5 ykinetic energy = ½ mv2 (J)
. c+ c* Y: L( e6 v Qwhere9 G- [) t C1 ?0 Z9 q
m is the mass of the length L of the cutting element, in kilograms (see Figure 105);0 Q' x* T% Y4 j
v is the maximum attainable velocity of point Z which is half-way along the length L of the( ] V* ~1 ~ Y" s- Q# f
cutting element, in metres per second.
4 F- q0 [1 |7 XTherefore: v = 0,1047 n ( r– (L/2))7 i0 I1 p0 D. o: V
where: a0 F8 t/ `. H& ^
n is the maximum rotational speed with a full length of line or a new cutter fitted, in. I9 X0 W3 g1 o. e5 ^, |) E
revolutions per minute;
0 k) n3 x5 u( Qr is the distance from the axis of rotation of the cutting head to the outer tip of the cutting
5 A) S( \ e( c' Ymeans, in metres;
, k7 X: ^& x" U3 `L is the measured length of the cutting element, in metres.: ?$ q% f: F2 s2 j' ]7 W" D7 K
2 V. E5 B; }/ u7 U* }
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