Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
  • B60S1/00—Cleaning of vehicles
  • B60S1/02—Cleaning windscreens, windows or optical devices
  • B60S1/04—Wipers or the like, e.g. scrapers
  • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
  • B60S1/34—Wiper arms; Mountings therefor
  • B60S1/3425—Constructional aspects of the arm
  • B60S1/3445—Joints between elements
  • B60S1/345—Joints between elements the elements being a link piece and a mounting head
  • B60S1/3454—Joints between elements the elements being a link piece and a mounting head the joint being at end of mounting head furthest away from blade
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
  • B60S1/00—Cleaning of vehicles
  • B60S1/02—Cleaning windscreens, windows or optical devices
  • B60S1/04—Wipers or the like, e.g. scrapers
  • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
  • B60S1/34—Wiper arms; Mountings therefor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
  • B60S1/00—Cleaning of vehicles
  • B60S1/02—Cleaning windscreens, windows or optical devices
  • B60S1/04—Wipers or the like, e.g. scrapers
  • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
  • B60S1/34—Wiper arms; Mountings therefor
  • B60S1/3425—Constructional aspects of the arm
  • B60S1/3445—Joints between elements
  • B60S1/345—Joints between elements the elements being a link piece and a mounting head
  • B60S1/3456—Locks or stays for holding arms in fully folded back position
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
  • B60S1/00—Cleaning of vehicles
  • B60S1/02—Cleaning windscreens, windows or optical devices
  • B60S1/04—Wipers or the like, e.g. scrapers
  • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
  • B60S1/34—Wiper arms; Mountings therefor
  • B60S1/3463—Means to press blade onto screen
  • B60S1/3465—Means to press blade onto screen with coil springs
  • B60S1/3468—Mountings therefor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
  • B60S1/00—Cleaning of vehicles
  • B60S1/02—Cleaning windscreens, windows or optical devices
  • B60S1/04—Wipers or the like, e.g. scrapers
  • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
  • B60S1/34—Wiper arms; Mountings therefor
  • B60S1/3425—Constructional aspects of the arm
  • B60S1/3431—Link pieces
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
  • B60S1/00—Cleaning of vehicles
  • B60S1/02—Cleaning windscreens, windows or optical devices
  • B60S1/04—Wipers or the like, e.g. scrapers
  • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
  • B60S1/34—Wiper arms; Mountings therefor
  • B60S1/3479—Means to cover the wiper parts
  • B60S1/3481—Means to cover the wiper parts for mounting head

Definitions

• the present invention relates to a wiper element intended to ensure the connection between the output shaft of a drive mechanism and the frame of a wiper.
• the invention relates in particular to windscreen wipers for motor vehicles.
• the glazed surfaces subjected to spraying must, when it is desired to maintain good visibility through them, to be subjected to the action of wipers, which generally have an alternative sweeping movement.
• the wipers act on the surface to be swept by means of a wiper blade which is driven by a motor mechanism by means of a wiper element ensuring the mechanical connection between the wiper blade. wiper and the drive mechanism.
• the drive mechanism comprises, in general, a rotary axis on which is assembled an assembly head, which is articulated, by means of a cylindrical articulation, relative to a casing secured to an arm of wiper.
• An elastic system is interposed between the casing and the aforementioned head so as to maintain, during the operation of the wiper, an elastic support of the wiper blade on the surface to be swept; this elastic system generally uses a helical spring, which can work either in tension or in compression.
• a windscreen wiper element of this type has already been described using a spring, which works in compression.
• the helical compression spring was associated with a plate articulated on the drive head, said plate comprising in its central zone a recess where the spring was housed; the plate was likely to slide relative to the housing; to prevent the movement of the spring perpendicular to the plate, provision was made to arrange along the axis of the spring an anti-buckling rod.
• the mounting of such a spring working in compression did not present any major difficulties but was very difficult to automate.
• the forces supported by the plate associated with the spring implied that this plate is made of metal.
• the present invention aims to provide a wiper element of the type defined above, using a spring working in compression between the drive head and the housing associated with the wiper arm, this element may include a spring guide which can be produced in plastic material and having a structure which lends itself well to automated assembly.
• the compression spring is placed inside a tubular guide and the adoption of the tubular shape for the member associated with the spring makes it possible to envisage the production of this plastic guide.
• the tubular guide is placed in simple support against two male pivoting elements carried by the casing and a flange of the drive head enters the guide to cooperate with one of the ends of the compression spring. It has been found that the installation of the various parts constituting this structure lends itself to automatic assembly.
• the present invention therefore has for its object the new industrial product that constitutes a wiper element intended to ensure the connection between the output shaft of a drive mechanism and the frame of a wiper. window, said element comprising, on the one hand, a head which is fixed on the aforementioned output shaft, on the other hand, an arm, one end of which carries a means of connection with the abovementioned wiper frame and the other end of which is mechanically connected to the aforementioned head by means of a casing, and, finally, a cylindrical articulation formed between the aforementioned head and the casing, a helical compression spring bearing on the one hand , sure.
• said helical spring being disposed inside a tubular guide closed at one of its ends by a bottom, said spring being substantially parallel to the axis of the guide and bearing, on the one hand, on the bottom of said guide and, on the other hand, on the head in the vicinity of the end of the tubular guide, which is opposite to the aforementioned bottom, characterized in that said guide is pivotally supported on the casing and can slide relative to the head, the spring resting on the head by means of a member linked to the head.
• the tubular guide comprises two parallel wings, perpendicular to the axis of the cylindrical articulation of the casing relative to the head, said wings defining two parallel sliding grooves, where the ends of a axis carried by the head; in a first variant, the grooves can be simple notches made in the wings of the tubular guide and, in another variant, the grooves can be delimited by a wall projecting outside the guide; the axis carried by the head is parallel to the axis of the cylindrical articulation of the casing with respect to the head and it is supported by a flange, which can move between the two parallel wings of the tubular guide, an area of the guide being indented to allow the passage of the flange between the two wings; the two sliding grooves are substantially parallel to the axis of the tubular guide; the cross section of the tubular guide is square.
• the guide comprises externally, on the side of its bottom, two recesses cooperating with two male pivot elements carried by the casing, said recesses constituting the bearings said male elements; a recess is made on each of the wings of the guide, the two recesses being identical and constituted by the ablation, according to a rounded profile, of the part of the wing of the guide which is close to the bottom; the male pivoting elements carried by the casing are tongues with rounded ends projecting inside the casing; the tongues are formed by punctures obtained by stamping the casing.
• the cylindrical joint which is provided between the housing and the drive head, gives the possibility of releasing the wiper relative to the windshield by pivoting about the axis of said joint; however, it is known that the release movement of the wiper arm relative to the windshield must be limited in order to avoid either a deterioration of the wiper element or a deterioration of the body of the vehicle, or a simultaneous deterioration of both.
• the tubular guide comprises at least one rib in relief towards the outside, said rib being arranged transversely by relation to the axis of the guide; the rib may have a mean oblique plane with respect to the axis of the guide and it comes into contact with the casing to form a stop when the wiper is at the end of its stroke in the raised position; the casing may have a U-shaped cross section and the core of the U is then shaped to present at least one boss, which cooperates with the rib to form the end of travel stop.
• the tubular guide to comprise, on the external face of its wall which faces the core of the casing, at least one relief disposed in the vicinity of its end opposite the bottom.
• the relief consists of at least one veil disposed longitudinally on the guide, perpendicular to the wall of the guide which carries said veil;
• the guide comprises two sails parallel to its two wings and braced between them by the rib which is in relief in the vicinity of the bottom and which constitutes the first stop;
• the outer face of a veil coincides with the inner face of the adjacent wing of the guide and said veil extends perpendicularly to the bottom of the guide, beyond said bottom.
• FIG. 1 shows a longitudinal section of the wiper element according to the invention in the position, which corresponds to a bearing of the scraper blade of the wiper on the windshield to be swept;
• Figure 2 shows a longitudinal section similar to that of Figure 1, when the wiper arm is at the end of its clearance travel relative to the windshield;
• Figure 4 shows an external elevational view of Figure 1, the housing cap being lowered
• FIG. 5 shows an external elevational view similar to that of Figure 4, the housing cap being raised;
• FIG. 7 shows, in perspective, the tubular guide of the compression spring of the wiper element of Figures 1 to 6;
• Figure 9 shows a bottom view of the element of Figure 1.
• the drive head 2 comprises a plate 2a, where the housing 2b of the axis drive shaft 1 is formed, and a flange 2c, the plane of which is perpendicular to that of the plate 2a.
• the shaft 4 constitutes the articulation shaft between the head 2 and the casing 5 of the wiper element according to the invention.
• the casing 5 connects the head 2 with a wiper arm 6, the end of which (not shown) carries a hinge on which the frame of a wiper squeegee is assembled.
• the casing 5 consists of two parallel wings 5a, 5b connected together by a core 5c. In line with the plate 2a of the head 2, the core 5c of the casing 5 has been removed to allow free access to the head 2 in order to be able to act on the nut, which is screwed at the end of the shaft. drive to block head 2 on said shaft.
• a movable cap 8 which can pivot relative to the casing around two journal studs 7a, 7b carried by the cap and engaged in orifices of corresponding dimensions formed in the wings 5a and 5b of the housing 5 respectively.
• the cap 8 covers the end of the housing 5 where the head 2 is located, that is to say the end of the housing 5, which is opposite to the wiper arm 6.
• the cap 8 is therefore. consisting of two parallel wings 8a, 8b connected together by a core, the wings 8a, 8b coming from either side of the wings 5a, 5b respectively; the core of the cap 8 conceals the head 2, when the cap is lowered as shown in FIG. 4, but gives free access to this head, when it is raised as shown in FIGS. 5 and 6.
• the flange 2c of the head 2 is arranged in the median longitudinal plane of the wiper element according to the invention; the plate 2a and the flange 2c have a certain number of recesses to lighten the head 2.
• a rounded surface 2d is provided along the axis of which is put in place an axis 9.
• the axis 9 projects on either side of the rounded surface 2d and the ends of the axis 9 slide in grooves 10 made in the lateral wings 11a, 11b of a tubular guide designated by 12 as a whole.
• the tubular guide 12 is a sen section tube squarely square with a bottom 13 and an open end.
• the guide 12 is made of molded plastic.
• the lateral wings 11a, 11b of the guide 12 are connected together by an upper face 14, a lower face 15 and by the bottom 13.
• the tubular guide 12 is placed in the casing 5, so that the upper face 14 is facing the core 5c of the casing 5 and that the lateral wings 11a, 11b are respectively opposite the lateral wings 5a, 5b of the casing 5.
• the bottom 13 of the guide 12 is arranged on the side of the wiper arm 6.
• the grooves 10 defined in the lateral wings 11a, 11b of the guide 12 are arranged on the side of the flange 2c and its axis 9.
• a spring is put in place helical 16, which works in compression.
• the spring 16 rests on the bottom 13 of the guide 12 and it is compressed by the rounded surface 2d of the flange 2c.
• the flange 2c and its rounded surface 2d_ penetrate into the guide 12 by a notch 17 obtained by removing the part of the lower wall 15, which is located at the grooves 10.
• the projecting ends of the axis 9 can slide in the grooves 10 and the relative displacement of the flange 2c relative to the guide
• One end of the spring 16 is supported on the rounded surface 2d and the other end on the bottom
• the elastic force exerted by the spring 16 on the guide 12 is transferred to the casing 5 while ensuring support of the guide 12 on the casing 5; this support is obtained by two tongues 18a, 18b cut by stamping respectively in the wings 5a, 5b of the housing 5 by forming punctures in said wings.
• the tongues 18a, 18b have a rounded end and protrude inside the volume delimited by the wings 5a, 5b; they can therefore constitute male elements for a pivoting support.
• the webs 20a, 20b are respectively adjacent to the wings 11a, 11b of the guide 12 and are braced, in the vicinity of the bottom 13, by a transverse rib 21; the rib 21 is substantially planar and its plane is oblique with respect to the axis of the guide 12.
• the webs 20a, 20b extend beyond the bottom 13 to form webs 22a, 22b respectively; the sails 22a, 22b are braced on the one hand, by the rib 21 and, on the other hand, by a rib 23, which extends beyond the bottom 13 the upper face 14.
• the plans of the sails 20a, 22a of on the one hand, and 20b, 22b on the other hand, are combined.
• the outer face of the webs 20a, 22a is in the same plane as the underside of the wing 11a; similarly the outer face of the sails 20b, 22b is in the same plane as the inner face of the wing 11b.
• This arrangement makes it possible to produce the guide 12 in a relatively simple mold avoiding the presence of a transverse drawer for producing the rear recesses of the wings 11a, 11b.
• the production of the plastic guide 12 is made possible due to the large moment of inertia that a tubular structure presents, which makes it possible to compensate for the relatively weak mechanical characteristics of the plastic materials and allows the guide 12 to withstand the forces applied by the spring 16.
• the core 5c has been deformed in the zone where the rib 21 comes into abutment so as to create an inner boss 24 and an outer boss 25 which are connected together by a substantially perpendicular front 26 to the path of the end of the rib 21 relative to the casing.
• the front 26 therefore ensures, by cooperation with the rib 21, a stop limiting the clearance travel of the wiper relative to the windshield. It is clear that, between the positions shown in FIGS. 1 and 2, the wiper element passes through an unstable equilibrium position when the axis of the guide 12 is in the plane defined by the axes 4 and 9.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Transmission Devices (AREA)
• Window Of Vehicle (AREA)
• Ink Jet (AREA)
• Power Steering Mechanism (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9254832

Family Applications (1)

Country Status (6)

Cited By (4)

Families Citing this family (1)

Citations (5)

• 1981
  • 1981-02-04 FR FR8102137A patent/FR2499008B1/fr not_active Expired
• 1982
  • 1982-02-04 BR BR8205981A patent/BR8205981A/pt not_active IP Right Cessation
  • 1982-02-04 WO PCT/FR1982/000023 patent/WO1982002693A1/en active Application Filing
  • 1982-02-04 DE DE3231638T patent/DE3231638C2/de not_active Expired - Fee Related
  • 1982-02-04 JP JP57500479A patent/JPS58500016A/ja active Granted
  • 1982-10-01 SU SU823499763A patent/SU1233796A3/ru active

Patent Citations (5)

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