FR2664219A1 - Windscreen wiper - Google Patents

Abstract

Windscreen wiper for a vehicle including a support arm (1) and a wiper (3), the support arm including, at one end, means (5) for positioning it in the working zone and, at the other end, means (4) for making the wiper rotate through 360 DEG indefinitely.

Description

1 - Wiper.

  The present invention relates to a wiper of new design.

  The use of windshield wipers is as old as that of the automobile.

  All known wipers have a back-and-forth stroke which implies the existence of at least two points

dead.

  The method of obtaining the order is conventionally ensured by a motor and a lever. The number of revolutions of the motor must be very low, due to the clean construction and the design of the wiper. , the obvious disadvantages of current wipers which have not yet been overcome are, in addition to those already mentioned: the accumulation of elements (for example snow) on the wipers when these are in position rest the excessive work of the engine with continuous alternations of successive starts / stops;

  the low number of revolutions which negatively affects the efficiency of the brush.

  The invention aims to remedy these drawbacks.

  According to a first characteristic of the invention, the wiper is remarkable in that it comprises a blade mounted in a support o the blade comprises means30 for rotating it indefinitely over 360 relative to the support secured to an arm carrier; and o said support arm comprises means for moving and for presenting the broom and its support in two extreme positions, working and wiping. Thus, according to the invention, the appearance of a wiper is preserved. conventional automobile with support arm and broom in

  avoiding all the disadvantages mentioned.

  The advantages of this broom compared to conventional brooms are, among others: that the number of turns can be much higher, since there are no dead spots; double the efficiency compared to conventional brooms, passing twice per revolution through the same point, 10 the rotation of the broom always in the same direction, which

  avoids accumulations in certain areas.

  To fix the object of the invention illustrated in a nonlimiting manner in the figures of the drawings o Figure 1 schematically shows the wiper according to the invention, in a general configuration thereof with two embodiments of the blade ( 3). FIG. 2 schematically represents means (4) capable of rotating the brush (3) in its

  support (2) relative to the arm <1).

  Figure 3 shows schematically means (4) capable of rotating the brush (3> in its support (2) relative to the arm (1), o such means (4)

  have an alternative configuration In this figure 25 3, the telescopic constitution of the arm (1) is observed.

  FIG. 4 schematically represents the action of a motor (6) acting indirectly on the brush (3).

  FIG. 5 schematically represents the action of a motor (6) directly on the brush (3).

  In order to make the object of the invention more concrete, it is now described in a nonlimiting manner in the figures of the drawings: The present invention relates to a wiper of new design comprising an arm (1> a support (2) a brush (3) means (4) for rotating the brush (3) over 360 relative to the arm (1) and its support (2). According to a displacement (DI) illustrated in FIG. 1, means (5) to move the arm (1), and present the brush (3) and its support (2) in two extreme positions,

  work and wiping according to movements (D 2) illustrated in Figures 1 and 2.

  Starting from this basic idea, the forms to implement this wiper without leaving the field of

  the invention are innumerable In the description which follows, construction directives are given by way of nonlimiting examples of practical implementation.

  As regards the transmission of the rotational movement from the means <4), it is normally a direct current motor. 20 According to the embodiment shown in FIG. 2, a set of bevel gears (41 42) are associated, one (41) with an axis (43), which is the motor output axis (4) and the other (42) with the axis of rotation (44) of the brush (3) These

  pins (43 44) are mounted respectively on the arm (1) and 25 on the support (2), in turn made integral with each other by a junction plate (45).

  According to the embodiment shown in FIG. 3, a cable (46) is used (tensioning cable which transmits rotational movements following any trajectory30> which, coupled by its ends respectively to the motor (4) and to the brush (3> it transmits its rotational movement This cable (46> can slide in a sheath outside the arm (1) or, preferably inside the arm, this is why the arm (1) is tubular In this case, the arm ( 1) and the support (2) are also rendered -4-

  joined together by welding or by other means.

  As regards the movement of the arm (1), the assembly (2), (3) is associated therewith, in order to reach the two working and rest positions. 5 According to the embodiment shown, the means (5) is a DC motor It can be the same motor (4) mentioned above in a different phase of operation or another independent motor (5); and a) The arm (1) can move angularly between two extreme positions (once in a rest-work direction when the wiper is switched on and another time only in the work-rest direction when the wiper stop) operated by the means (5>. Displacement (D 2) in Figure 1.15 b) The arm (1) has a telescopic constitution and telescopically moves one of its parts, for example (11 ), with respect to the other (12) (once in a rest-work direction when the wiper is started and once only in the direction

  work-rest when the wiper stops) actuated by the means (5) Displacement (D 2) in Figure 3.

  As seen in Figure 1, the brushes (3) can take a curved shape which promotes the wiping effect.25 The means for transmitting a rotation of 360 to the brush can also consist of a belt

  notched carried by the support arm meshing with a fixed element of the brush.

  In FIGS. 4 and 5, the support arm (1) does not carry the mechanical movement transmission elements but only carries an electric cable (7) for

  powering a motor (6) supported by said arm (1) and which, by means of a gear train (40) (figure 4) or directly (figure 5), actuates the rotational movement35 of the brush (3).

-5-

Claims (6)

  -1 Wiper of new design, characterized by the fact that it consists of a blade <3), of a support arm (1) which positions the blade in the working position on the windshield of the vehicle, and means (4) for transmitting to the sweep a 360 rotation.   -2 Wiper according to claim 1, characterized in that it comprises a blade (3) mounted on a support <2), the blade comprising means (4) to rotate it indefinitely over 360 'relative to the support integral with a carrying arm, the carrying arm comprising means (5> for moving and presenting the brush and its support in   two extreme positions, working and wiping.   -3 Wiper according to Claims 1 and 2   assembly, characterized in that the means (4) cited for rotating it indefinitely relative to the support and its support arm are a motor whose output axis comprises a bevel gear (41) engaged with a bevel gear <42)   conjugate whose axis (44) is integral with the brush.   -4 Wiper according to claim 2, characterized in that the means mentioned for indefinitely rotating the blade relative to the support and its support arm are a motor whose output axis is coupled to a transmission cable (46 ) of the rotational movement connected by its   other end to the axis of rotation of the brush.   -5 Wiper according to claim 1, characterized in that the carrier arm (1) cited has a tubular configuration and has inside the elements of   transmission of the rotational movement to the broom.   -6 Wiper according to claim 1, characterized in that the carrier arm mentioned has a telescopic configuration. -7 Wiper according to any one of   claims 1 to 6, characterized in that the means   cited for the movement of the arm are a motor capable of angularly or telescopically moving the arm relative to a fixed place of assembly to reach its working or wiping positions.   -8 Wiper according to claim 1, characterized in that the end of the support arm comprises a motor   actuating the brush directly or indirectly.