CN201475220U - Square wire torsion spring for clutch of washing machine - Google Patents

Abstract

The utility model discloses a square wire torsion spring for a clutch of a washing machine, which comprises a helical spring body; the section of the spring body is rectangular; a chamfer angle is formed on a rectangular right angle side; the diameter of the lower part of the spring body gradually contracts inwards to from a cone shape; and the internal diameter of a first ring at the top part of the spring body contracts inwards. The utility model has the advantages that the intensity of the spring is completely ensured, the joint between the spring and a drive shaft of the clutch is tight and reliable, the joint area is large, the concentricity and the roundness are ensured, the clutch performance is excellent, and no change exists in the use.

Description

Clutch coupling of washing machine is with square line torsion spring

Technical field

The utility model relates to a kind of spring, a kind of specifically be applied to pulsator washing machine inside finish on the clutch of washing and dehydration work, by unclamping and holding the spring that action realizes clutch function tightly.

Background technique

Spring commonly used all is that the cross section is cylindrical, square or cross section four sidebands have circular chamfering, and these springs generally all are that the elasticity of utilizing self reaches damping vibration, compresses part, the function of self-locking and clutch on-off.At the used spring of clutch, owing to adopt the direct contact friction of inwall and rotating shaft to realize holding tightly, the requirement inwall is level and smooth, to reach the purpose with the comprehensive engagement of rotating shaft surface, so the spring of cylindrical cross-section can not meet the demands, as shown in Figure 5, Chang Yong spring all is to adopt square cross section and adopt rounded corner.But this spring particularly for the use of rounded corner, reduces the area of contact of spring inwall and rotating shaft in the process of processing and manufacturing greatly, is easy to generate the noise that skids and rub and bring.Overcome these defectives if desired, way commonly used is the simple size that adds big spring, and this also causes pulsator washing machine clutch volume excessive, but still has poor work stability, short defective of life-span.So based on the problems referred to above, our company is explored and test through long-term, improves on the basis of original spring, and section of steel wire and raw material are changed, make the reliability of elastic device reach washing machine reliably requirement of washing more than 5000 times.

The model utility content

The purpose of this utility model provides a kind of clutch coupling of washing machine with square line torsion spring, overcomes little, the bulky problem of clutch spring area of contact commonly used.

The purpose of this utility model is to be achieved through the following technical solutions:

A kind of clutch coupling of washing machine comprises spiral spring body with square line torsion spring, and the cross section of body is a rectangle, does little chamfering at the right angle side of rectangle; The lower diameter of body is inwardly shunk tapered successively, and the internal diameter of bodies top first lap inwardly shrinks.

The constriction zone of further described first lap is 3/4ths circumference.

The intensity of spring described in the utility model has obtained sufficient assurance, and tight, reliable with the applying of clutch driving shaft, fitting area is big, and concentricity and circularity are guaranteed, the disengaging performance brilliance, and in use without any distortion.

Description of drawings

With embodiment the utility model is described in further detail with reference to the accompanying drawings below.

Fig. 1 is the applied pulsator washing machine internal clutch of the described spring of a utility model embodiment structural drawing;

Fig. 2 is the structural drawing of the described spring of the utility model embodiment;

Fig. 3 be among Fig. 2 A to view;

Fig. 4 is the cross-sectional view of the described spring of the utility model embodiment;

Fig. 5 is the cross-sectional view of the spring used always.

Among the figure:

1. clutch; 2, rotating shaft; 3, spring; 4, little chamfering; 5, rounded corner.

Embodiment

As shown in Figure 1, spring 3 described in the utility model is applied to the position of the rotating shaft 2 of pulsator washing machine internal clutch 1, adopt spring 3 to be fixed on the outside of clutch 1 rotating shaft 2, begin to shrink and hold tightly, reach the effect of locking with rotating shaft 2 thereby spring 3 reverses the back external diameter.

Shown in Fig. 2,3,4, spring assembly described in the utility model comprises spiral spring body, and the cross section of body is a rectangle, does little chamfering 4 at the right angle side of rectangle; The lower diameter of body is inwardly shunk tapered successively, and the improvement to product is further analyzed below.

At original elastic device is low with the intensity of clutch spring, faying surface is poor, concentricity is difficult to shortcomings such as assurance.The utility model provides a kind of clutch coupling of washing machine elastic device clutch spring, and concrete improvement is as follows:

(1) aspect material specification: former spring material and sectional shape such as Fig. 5, at the four rounding of angle angles in cross section, fillet is big, and it is few to hold surface of contact during dehydration tightly; The material specification of new spring makes Fig. 4 pattern into, and four jiaos of chamferings of material have increased area of contact, easier embracing below 0.2.

(2) aspect the material material: former spring material material is 70# or 65Mn material, and the strength of materials is low, and tensile strength is inhomogeneous, causes the out-of-flatness of spring inwall, thus when washing the noise height, easily skid during dehydration; New spring adopts the SWRS82A piano wire, has solved the strength problem of material, makes the noise of washing machine and skid thoroughly to improve.

(3) aspect spring 3 face shapings: as shown in Figure 2, shrink taperedly successively at C position circle, differ 0.3～0.4mm with top.The concrete mode of taper is, the radius of 1-1.5 circle is identical and minimum from the bottom up, carries out the transition to normal size gradually from the radius of 1.5-3 coil spring.Shown in Fig. 2,3, designed first lap 3/4ths circumference at the B position and promptly shunk 0.1～0.3mm in 270 ° of scopes, it is progressively increased after stressed from first lap when dehydration, reach slow earlier after fast effect.

The intensity of new spring has obtained sufficient assurance, and tight, reliable with the applying of clutch driving shaft, fitting area is big, and concentricity and circularity are guaranteed, the disengaging performance brilliance, and in use without any distortion.Therefore, the reliability of its elastic device has reached the effect of washing machine reliable washing more than 5000 times.

Claims (2)

1. a clutch coupling of washing machine comprises spiral spring body with square line torsion spring, it is characterized in that, the cross section of body is a rectangle, do little chamfering at the right angle side of rectangle, the lower diameter of body is inwardly shunk tapered successively, and the internal diameter of bodies top first lap inwardly shrinks.

2. clutch coupling of washing machine according to claim 1 is characterized in that with square line torsion spring the constriction zone of first lap is 3/4ths circumference.

Images