CN201300815Y - Connecting structure for connecting rear wiper arm and connector - Google Patents

Abstract

The utility model relates to a connecting structure used for connecting a rear wiper arm and a connector, which comprises a pull spring, a wiper arm, a connector and a connector hood. A pull spring block is arranged at the middle of the wiper arm; a bump is arranged at the joining end of the wiper arm connected with the connector; an open semicircular hole is arranged at the middle part of the bump along the transverse direciton, and the part of the bump, above the open semicircular hole, is longer than the part below the open semicircular hole; a groove matching with the bump of the wiper arm is longitudinally arranged at the joining end of the connector connected with the wiper arm; a round shaft is arranged at the upper part of the front end of the groove of the connector and is clamped in the open semicircular hole; two lug bosses are symmetrically arranged at the left and the right of the lower edge of the rear part of the groove; and the front head faces of the two lug bosses are vertical planes. A pull spring pin is arranged in the groove, one end of the pull spring is hooked on the pull spring block and the other end of the pull spring is hooked on the pull spring pin. The connecting structure can solve the problem that the pull spring is difficult to assemble, and can protect the surface of the pull spring better, and meanwhile the wiper arm and the connector can be matched more smoothly.

Description

The connection structure of a kind of rear wiper scraping arm and joint

Technical field

The utility model belongs to auto body attachment technique field, the particularly connection structure of Windshield Wiper scraping arm and joint.

Background technology

At present, the connection structure of most of plastics system rear wiper scraping arm and joint as shown in Figure 1 and Figure 2, this structure comprises extension spring 1, scraping arm 2 (being illustrated as one section of its front), joint 3 and joint cover cap 4.Be provided with extension spring piece 21 in scraping arm 2 position intermediate, at the scraping arm front end one projection 23 arranged, this protruding width is less than the width of scraping arm 2, and the approximate mid-section position is along laterally having opening circular hole 22 on the projection 23, and its opening size is less than Circularhole diameter.Joint 3 front end edges vertically have the groove 33 that matches with the scraping arm projection, the joint upper front end has half circular shaft 31, the diameter of semicircle axle 31 matches with opening circular hole 22 on the scraping arm, the minimum size of semicircle axle can just be by the opening portion on the scraping arm projection, joint 3 bottoms also are provided with tension spring pin 32, extension spring 1 one end devices are on extension spring piece 21, and an end device is on tension spring pin 32.The fitting process of scraping arm and joint is: the direction that the semicircle axle 31 on the joint 3 is parallel to plane of the opening with specific semicircle axis plane pushes in the opening circular hole 22 on the scraping arm 2, as shown in Figure 2, again joint 3 is oppositely gone back to scraping arm 2 and touch, one end of extension spring 1 is hooked in extension spring piece 21 on the scraping arm 2 earlier, clamp extension spring 1 with pliers again, firmly extension spring 1 is elongated that the other end is hooked on the tension spring pin 32 on the joint 3, again joint cover cap 4 is fastened on the joint 3 at last.

This structure has two shortcomings: (1) if the timing of personnel selection frock will very be required great effort, working strength is very big; (2) layer of paint with the clamping place surface in the extension spring 1 later of pliers folder comes off destroyed, and extension spring is easy to get rusty.

Summary of the invention

The utility model has proposed the connection structure of a kind of rear wiper scraping arm and joint at the deficiencies in the prior art, can solve the relatively problem of difficulty of extension spring assembling, better protection extension spring surface, and scraping arm cooperates more steady with joint simultaneously.

The technical solution of the utility model is as follows:

The connection structure of a kind of rear wiper scraping arm and joint, comprise extension spring, scraping arm, joint and joint cover cap, be provided with the extension spring piece at the scraping arm midway location, at scraping arm and joint coupling end one projection is arranged, this protruding width is less than the width of scraping arm, and the medium position of projection is along laterally having an open pore, joint and scraping arm coupling end longitudinally have the groove that matches with the scraping arm projection, be provided with tension spring pin in the groove, extension spring one end hook is on the extension spring piece, and an end hook is on tension spring pin.Its improvements are that the open pore of described scraping arm and joint coupling end is the open semi circular hole, and projection is longer than the lower end in the upper end at open semi circular hole position; Front end at the groove of joint is provided with a circular shaft by top, is stuck in the open semi circular hole, is respectively arranged with a boss in the following left-right symmetric of the rear positions of groove, and the front end face of this two boss is a perpendicular.

Further, the right and left of described projection is respectively arranged with two fitting surfaces parallel and that be higher than the right and left of projection; The chamfering of the lower end of described projection is a fillet; Described tension spring pin is arranged on the interior boss of groove.

Fitting process is: under state of nature with an end hook of extension spring on the extension spring piece of scraping arm, its other end is hooked on the tension spring pin of joint, and the vertical plane of the rear portion boss of joint leaned against on the fillet on the scraping arm, at this moment the circular shaft on the joint has been in the open semi circular hole outside on the scraping arm, as shown in figure 10.The afterbody of joint is upwards moved, circular shaft is taken advantage of a situation and is slipped in the open semi circular hole again, and scraping arm, joint and extension spring have just assembled, as shown in figure 11.

The advantage of this structure is as follows:

1, designed openings semicircle orifice and fillet on scraping arm, the vertical plane that cooperates with fillet is set, in the process of stretching extension spring, owing to utilized lever principle in the groove of joint, assembly force will be than directly the used power of stretching extension spring be little a lot of in the old-fashioned structure, and working strength reduces greatly.

2, because scraping arm and joint are Plastic Parts, when the assembling extension spring, if two fitting surface total contacts that scraping arm cooperates with joint, fitting surface is easy to distortion, and just cooperating like this is not very steady, and it is bigger to scrape arm swing, the form that the utility model has adopted small size to cooperate, allow the fitting surface of small size protrude basic side, cooperation is tightr like this, and is more steady during scraping arm work.

3, need not use the instrument of pliers and so in the fitting process, also just can not destroy the layer of paint on extension spring surface, protect the extension spring surface.

Description of drawings

Fig. 1 is the exploded perspective view of prior art scraping arm and joint design;

Fig. 2 is prior art scraping arm and joint assembling scheme drawing;

Fig. 3 is the exploded perspective view of the utility model scraping arm and joint design;

Fig. 4 is that the utility model is scraped the arm configuration front elevation;

Fig. 5 is that the utility model is scraped arm configuration front elevation A-A cutaway view

Fig. 6 is that the utility model is scraped the arm configuration cutaway view;

Fig. 7 is the utility model scraping arm block diagram;

Fig. 8 is the utility model joint design cutaway view;

Fig. 9 is the utility model joint block diagram;

Figure 10 is the utility model scraping arm, joint and extension spring assembling A-stage scheme drawing;

Figure 11 is the utility model scraping arm, joint and extension spring assembling completion status scheme drawing;

Wherein, 1. extension spring 2. scraping arms 21. extension spring pieces 22. opening circular holes 23. protruding 24. open semi circular holes, 25. fillets, 26. fitting surfaces, 3. joints, 31. semicircle axles, 32. tension spring pins, 33. grooves, 34. circular shafts, 35. vertical planes, 36. boss, 4. joint cover caps

The specific embodiment

Referring to Fig. 3, the connection structure of this rear wiper scraping arm and joint comprises extension spring 1, scraping arm 2 (being illustrated as one section of its front), joint 3, joint cover cap 4.

In conjunction with Fig. 4, Fig. 5, Fig. 6, be provided with extension spring piece 21 in scraping arm 2 position intermediate, assembling end at scraping arm and joint has a projection 23, the width of this projection 23 is less than the width of scraping arm 2, the medium position of projection 23 is along laterally having open semi circular hole 24, its opening size equals Circularhole diameter, the right and left of projection 23 is respectively arranged with two parallel fitting surfaces 26, this fitting surface 26 is slightly higher than the right and left of projection 23, projection 23 is longer than the lower end in the upper end at open semi circular hole position, and the chamfering of lower end is a fillet 25.

In conjunction with Fig. 7, Fig. 8 and Fig. 9, joint 3 longitudinally has the groove 33 that the projection 23 with scraping arm matches at the assembling end with scraping arm 2, the front end of groove 33 is provided with a circular shaft 34 by top, be respectively arranged with a boss 36 in the following left-right symmetric of the rear positions of described groove, tension spring pin 32 is contained on the boss 36, and this two boss front end face is a perpendicular 35.

Fitting process is: under state of nature with an end hook of extension spring 1 on the extension spring piece 21 of scraping arm 2, its other end is hooked on the tension spring pin 32 of joint 3, and the vertical plane on the joint 3 35 leaned against on the fillet 25 on the scraping arm 2, at this moment the circular shaft 34 on the joint 3 has been in open semi circular hole 24 outsides on the scraping arm 2, as shown in figure 10.The afterbody of joint 3 is upwards moved, circular shaft 34 is taken advantage of a situation and is slipped in the open semi circular hole 24 again, and scraping arm 2, joint 3 and extension spring 1 have just assembled, as shown in figure 11.Again joint cover cap 4 is fastened on the joint 3 at last.

Claims (4)

1, the connection structure of a kind of rear wiper scraping arm and joint, comprise extension spring, scraping arm, joint and joint cover cap, be provided with the extension spring piece at the scraping arm midway location, at scraping arm and joint coupling end one projection is arranged, the medium position of projection is along laterally having an open pore, and joint and scraping arm coupling end longitudinally have the groove that matches with the scraping arm projection, are provided with tension spring pin in the groove, extension spring one end hook is on the extension spring piece, and an end hook is on tension spring pin; It is characterized in that: the open pore of described scraping arm and joint coupling end is the open semi circular hole, and projection is longer than the lower end in the upper end at open semi circular hole position; Front end at the groove of joint is provided with a circular shaft by top, is stuck in the open semi circular hole, is respectively arranged with a boss in the following left-right symmetric of the rear positions of groove, and the front end face of this two boss is a perpendicular.

2, the connection structure of rear wiper scraping arm according to claim 1 and joint is characterized in that: the right and left of described projection is respectively arranged with two fitting surfaces parallel and that be higher than the right and left of projection.

3, the connection structure of rear wiper scraping arm according to claim 1 and 2 and joint is characterized in that: the chamfering of the lower end of described projection is a fillet.

4, the connection structure of rear wiper scraping arm according to claim 3 and joint is characterized in that: described tension spring pin is arranged on the interior boss of groove.

Images