CN211995486U - Wiper arm and wiper - Google Patents

Abstract

The utility model relates to a wiper arm and wiper, this wiper arm can follow direction of going a way and return circuit direction swing back and forth to include: a wiper arm base (10) having a fixing hole (11A) having an axis (A) for mounting an output portion of an actuator of a wiper arm at a first end portion (11); an extension arm (20) pivotally connected to a second end (12) of the wiper arm base (10) opposite the first end (11); a wiper arm end member (30) mounted on one side of the extension arm (20); a first nozzle unit (40) and a second nozzle unit (50) which are respectively provided with a first conduit (41) and a second conduit (51) and spray cleaning fluid towards the surface to be scraped, wherein the first conduit and the second conduit are guided in the scraper arm seat in a superposed manner relative to the axis to a second end of the scraper arm seat (10) which is pivoted to the extension arm (20).

Description

Wiper arm and wiper

Technical Field

The utility model relates to a wiper arm and wiper.

Background

Wipers are equipped in motor vehicles to ensure a clear view of the driver during driving. The wiper mainly includes a driver (e.g., a motor), a wiper blade arm driven via the driver, and a wiper blade mounted on the wiper blade arm. When the wiper works, a wiper arm provided with a wiper blade swings back and forth on a windshield of the motor vehicle in an outward direction and a return direction under the driving of a motor so as to wipe the windshield. For example, in the case of rain, rain water is scraped off the windshield.

In the case of a windshield that is too dirty, for example, with dust or oil adhered thereto, it is also necessary to spray a cleaning fluid, for example, glass water, onto the windshield during operation of the wiper so that the wiper can smoothly and quietly wipe the windshield clean. Typically, the cleaning fluid is sprayed upwardly onto the windshield through a nozzle mounted at the junction of the windshield and the engine cover. In this case, more cleaning fluid is required, and the sprayed cleaning fluid inevitably disturbs the driver's sight.

For this purpose, another wiper equipped with a nozzle unit is known, as is known from documents CN 206704156U and JP 2017210199 a. In such a wiper, it is necessary to reserve a guide channel for the conduit assigned to the nozzle unit. In this case, however, this inevitably has a negative effect on the structural strength of the component of the wiper arm, which is connected directly to the drive.

SUMMERY OF THE UTILITY MODEL

The object of the invention is therefore to avoid the above-mentioned disadvantages, at least in part, i.e. to minimize or even completely avoid the adverse effect on the strength of the individual components of the wiper arm, provided with a guide channel for the catheter.

According to the utility model discloses a first aspect provides a wiper arm, and this wiper arm of scraping can follow the direction of going a way and return circuit direction swing back and forth to include:

a wiper arm mount having a fixing hole at a first end for mounting an output portion of an actuator of a wiper arm, the fixing hole having an axis;

the extension arm is pivoted with a second end part of the scraping arm seat opposite to the first end part;

a wiper arm end piece mounted on a side of the extension arm opposite the wiper arm base;

a first nozzle unit provided with a first conduit and spraying a cleaning fluid toward a surface to be wiped when the wiper arm oscillates in a loop direction;

a second nozzle unit provided with a second conduit and jetting a cleaning fluid toward a surface to be wiped when the wiper arm swings in an outward path direction;

wherein the first and second conduits are guided one above the other in the wiper arm mount relative to the axis to a second end of the wiper arm mount that is pivotally connected to the extension arm.

By the proposed solution, the cleaning fluid nozzle units respectively arranged for the return path direction and the forward path direction can spray the cleaning fluid to the return path side and the forward path side of the wiper blade mounted on the wiper blade arm in a targeted manner, so that the area of the wiper blade to be wiped can be wetted with less cleaning fluid; furthermore, due to the overlapping guidance of the respective guide tube for the nozzle unit in the wiper arm seat relative to the mentioned axis, the ratio of the width of the space reserved for the guide tube in the wiper arm seat in the direction transverse to the longitudinal extension direction of the wiper arm seat is smaller relative to the width of the wiper arm seat, thereby avoiding an undesired excessive weakening of the strength of the wiper arm seat.

According to an embodiment of the present invention, the scraper arm base has a receiving portion for receiving the first guide tube and the second guide tube, and the receiving portion is provided at a side portion of the scraper arm base along a longitudinal direction of the scraper arm base. The accommodation may be in the form of a recess at the side of the wiper arm seat, the width of which corresponds to the dimension of the outer diameter of the conduit. The accommodating portion may extend from one longitudinal end side to the other longitudinal end side of the wiper arm base.

According to the utility model discloses an embodiment, the one side of scraping the face is treated towards the back of scraping the arm seat to the portion of holding opens. Thereby facilitating installation of the catheter into the receiving portion.

According to an embodiment of the invention, the wiper arm seat has a recess, the side of the recess facing the surface to be wiped being open. By providing the recess, the weight of the wiper arm base can be further reduced without affecting the structural strength of the wiper arm base itself. The recess can be formed by correspondingly designing the mold when the wiper arm base is cast. Of course, the recess may also be formed by machining or other suitable methods.

According to an embodiment of the invention, the receiving portion is provided with a stop for preventing the catheter from moving in a direction transverse to the longitudinal direction of the wiper arm base. The flap is particularly intended to prevent the catheter from escaping from the housing. Preferably, the shutter is formed integrally with the wiper arm base. The size, number and position of the baffle plates can be determined according to requirements.

According to an embodiment of the present invention, the wiper arm further has a cover cap covering the wiper arm base, and one side of the cover cap facing the surface to be wiped is open. In this case, the guide tube extends below the cover cap when the cover cap covers the wiper arm base. Therefore, the cover can prevent the guide pipe from a series of aging phenomena such as fading, discoloration, cracking, pulverization, strength reduction and the like caused by the influence of external conditions such as sunlight irradiation, wind, rain and the like, and also can prevent the guide pipe from mechanical damage. The cover may be injection molded from plastic.

According to an embodiment of the invention, the cover extends above the fixing hole. In this case, the cover cap can be used directly for fixing the cover portion of the hole without additional components being required for this purpose.

According to an embodiment of the present invention, the first nozzle unit and the second nozzle unit are installed on the extension arm or the wiper arm end piece, or the first nozzle unit and the second nozzle unit are installed on the extension arm and the wiper arm end piece, respectively. In short, the first nozzle unit and the second nozzle unit can be mounted on the associated support as needed. Preferably, the first nozzle unit and the second nozzle unit are as centered as possible with respect to the wiper blade, i.e. they have as the same distance as possible from both ends of the wiper blade, in order to optimize the distribution of the sprayed cleaning fluid over the surface to be wiped.

A second aspect of the present invention is also to provide a wiper having the wiper blade and the wiper arm described above, the wiper blade being mounted on the wiper arm, for example, a wiper arm end piece thereof. With regard to the advantages of the wiper, reference may be made to the above description of the wiper arm, which is not repeated here.

Drawings

The invention is further elucidated below with the aid of the accompanying drawing. Wherein the content of the first and second substances,

fig. 1 schematically illustrates a wiper for a vehicle according to the present invention;

FIG. 2 illustrates a view of a partial section of the wiper of FIG. 1;

fig. 3 shows an exploded illustration of a partial section of the wiper of fig. 2;

FIG. 4 shows a cross-sectional illustration of the wiper segment of FIG. 2 at a location E-E;

fig. 5 schematically shows a sectional illustration of a wiper according to the prior art at the location E-E corresponding to fig. 4.

Detailed Description

Embodiments of the present invention are exemplarily described below. As those skilled in the art will appreciate, the illustrated embodiments may be modified in various different ways without departing from the inventive concept. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive. In the following, the same reference numbers generally indicate functionally identical or similar elements.

Fig. 1 schematically shows a windshield wiper 1 for a vehicle according to the invention. The vehicle is not limited to a passenger car, but includes a truck or other motor vehicle.

The illustrated wiper 1 mainly includes a wiper arm 2 and a wiper blade 3. The wiper blade 3 is mounted on the relevant member of the wiper arm 2. The wiper blade 3 may be a boned wiper blade or a boneless wiper blade. The wiper 1 also comprises a drive, not shown, for example an electric motor. If a plurality of wiper arms, for example two wiper arms, are driven via one drive, the wiper 1 also comprises a transmission mechanism, not shown, for example a link mechanism, via which the drive movement of the drive is transmitted to the wiper arm 2 in order to achieve a reciprocating oscillating movement of the wiper arm 2.

Fig. 1 also schematically shows a windshield W of a vehicle, on which windshield W wiper 1 can be pivoted back and forth in an outward direction O and a return direction R by driving of a drive in order to wipe a surface of the windshield W. For this purpose, the opposite longitudinal outer sides of the wiper blade 3 may be referred to as the approach side and the return side, respectively.

The wiper arm 2 is elongated and has a wiper arm base 10, an extension arm 20, and a wiper arm end piece 30 connected to each other, the extension arm being located between the wiper arm base and the wiper arm end piece, wherein the wiper arm base 10 is connected to each other so as to be capable of rotational movement within a certain spatial range with respect to the extension arm 20, and the extension arm 20 is connected to the wiper arm end piece 30 so as not to be capable of relative movement. The wiper arm 2 is explained in detail below.

The wiper arm carrier 10 has a fastening hole 11A at the first end 11 for mounting the output of an actuator of a wiper arm, which fastening hole has an axis a. The drive may be or at least comprise a motor. If necessary, the drive may also comprise the transmission mechanism described above.

The extension arm 20 is pivotally connected to a second end 12 of the wiper arm mount 10 opposite the first end 11. The extension arm 20 is thus rotatable about the pivot axis 22 in a direction away from the windscreen, which enables the portion of the wiper arm starting from the extension arm to be lifted from the windscreen, thereby facilitating replacement of the wiper blade 3 mounted on the wiper arm 2.

The wiper arm end 30 is installed at a side of the extension arm 20 opposite to the wiper arm base 10. For example, in order to hold the wiper blade 3, the respective holding ends of the wiper arm end piece 30 may be U-shaped hook shapes, which are directly connected with the attachment portion of the wiper blade. Of course, the retention end may have other suitable shapes. In a further embodiment, a separate adapter piece (not shown here) for holding the wiper blade 3 is attached to the holding end of the wiper arm end piece 30. The structure for holding the wiper blade 3 is known in the art and will not be described in more detail here.

The wiper arm 2 also has a first nozzle unit 40, which is provided with a first conduit 41 and sprays cleaning fluid against the surface to be wiped when the wiper arm is pivoted in the return direction R, and a second nozzle unit 50, which is provided with a second conduit 51 and sprays cleaning fluid against the surface to be wiped when the wiper arm is pivoted in the return direction O. In other words, the first and second nozzle units 40 and 50 may be regarded as being disposed at both sides of the wiper blade 3 to respectively spray cleaning fluid thereto. Preferably, the nozzle unit is capable of spraying the cleaning fluid in different directions. For this purpose, the respective nozzle unit can have a plurality of nozzles which are oriented in different directions. Illustratively, a nozzle opening directs the cleaning fluid onto the windscreen towards one end side of the wiper blade, a nozzle opening directs the cleaning fluid onto the windscreen towards the other end side of the wiper blade, and a nozzle opening directs the cleaning fluid onto the windscreen between said two end sides. This makes it possible to spray the cleaning fluid to a desired area in a targeted and efficient manner.

As can be seen in fig. 1, the first nozzle unit 40 is mounted on the extension arm 20, the second nozzle unit 50 is mounted on the wiper arm end piece 30, and the wiper blade 3 is located between the two nozzle units. Of course, the first nozzle unit and the second nozzle unit may also be both mounted on the extension arm, or both mounted on the wiper arm end piece, or other suitable component. Preferably, the first nozzle unit and the second nozzle unit are as centered as possible with respect to the wiper blade, i.e. they have as the same distance as possible to both ends of the wiper blade, in order to optimize the distribution of the cleaning fluid over the surface of the windscreen.

The first and second conduits 41 and 51 serve to connect a cleaning fluid container, not shown, with the spouts of the first and second nozzle units 40 and 50, respectively, dispensed. The first conduit 41 and the second conduit 51 are held in the relevant parts of the wiper arm. In this case, damage to the catheter is to be avoided and a service life of the catheter is to be ensured which is as long as possible.

The wiper arm seat 10, the extension arm 20 and the conduits 41, 51 are shown in an assembled state and in an exploded state, respectively, in fig. 2 and 3.

It has been mentioned above that the extension arm 20 and the wiper arm base 10 are pivotally connected to each other. For this purpose, the extension arm 20 is connected to the wiper arm mount 10 via a pivot 22. The wiper arm base 10 has a guide hole 15 for the pivot shaft 22 at a second end portion 12 opposite to the first end portion 11 provided with the fixing hole 11A, and a portion where the guide hole is formed protrudes from the side wall of the wiper arm base 10 on both end sides in the longitudinal direction of the guide hole, and a protrusion 16 having a circular ring-shaped cross section is formed for this purpose. The extension arm 20 has a connecting wall 20A and side walls 20B, 20C on both sides of the connecting wall so that the extension arm 20 is open on one side. The extension arm may be, for example, a sheet metal part. Apertures are provided in both side walls of the extension arm 20. In the assembled state, the second end 12 of the wiper arm mount 10 is between the two side walls 20B, 20C of the extension arm 20, and the pivot 22 passes through the guide hole 15 of the wiper arm mount 10 and the aperture of the extension arm 20 and is fixedly connected with respect to the extension arm 20 such that the wiper arm mount 10 can rotate about the pivot 22. Both ends of the pivot shaft 22 may be upset, thereby preventing the pivot shaft 22 from coming out. Other anti-slip measures are also possible.

A preload member, such as a spring, is also provided in the wiper to apply a preload directed toward the windshield to the wiper arm in a state in which the wiper is mounted in the vehicle. In the case where the preload member is a spring, one end is attached to the wiper arm base 10 and the other end is attached to the extension arm 20 or other member fixedly attached to the extension arm 20. In fig. 3, an incompletely shown C-shaped element 23 is shown, which is connected to one end of the spring and the other end of which is hooked on the wiper arm base 10. The wiper arm carrier 10 also has a stop 17 at the second end, which rests under the action of a spring against the inner side of the extension arm 20, thus defining the initial state of the wiper arm. When the wiper blade needs to be replaced, the extension arm can be swung around the pivot in a direction away from the windscreen against the spring force of the spring. For this purpose, the swing-out range of the extension arm can be defined by the contact of the inner side of the C-shaped piece with the wiper arm seat.

In fig. 2, it can be seen that the first and second guide tubes 41, 51 are guided one above the other in the wiper arm mount 10 relative to the axis a to the second end 12 of the wiper arm mount 10, which is pivoted to the extension arm 20. This can also be seen more clearly in the cross-sectional view of fig. 4. For this purpose, the wiper arm base 10 has a receiving portion 13A for receiving the first guide tube 41 and the second guide tube 51, which is provided at a side portion of the wiper arm base 10 in the longitudinal direction of the wiper arm base 10. Thus, the receptacle may be considered as a passage for the conduit from the drive side of the wiper to the extension arm.

The receptacle 13A may be open toward the side of the wiper arm base 10 facing away from the surface to be wiped. This makes the installation of the catheter easier.

The accommodating portion 13A is provided with flaps 14A, 14B for preventing the catheter from moving in a direction transverse to the longitudinal direction of the wiper arm base 10. The number and position of the baffles can be set as required.

Furthermore, the wiper arm base 10 has a recess 13B, the side of the recess 13B facing the surface to be wiped being open. This can lighten the weight of the wiper arm base to reduce the load on the driver. The recess and the receiving portion may be adjacent to each other and have opposite open sides.

The wiper arm 2 may also have a cover 18. The cover 18 is, for example, a plastic part. The cover may be mounted to the wiper arm base after the conduit has taken up the correct position in the wiper arm base. For example, the side wall of the cover on one end side has a bayonet 19 which can be snapped onto the above-mentioned projection 16. Thus, the cover cap is between the side wall of the extension wall and the outside of the wiper arm base at the snap side. The cover also has, for example, hooks on the inside in order to be finally fixed at the wiper arm seat.

The cover 18 covers the wiper arm base 10 with the catheter attached. For this purpose, the side of the cover facing the surface of the windscreen to be wiped is open.

The cover 18 may also extend above the fixing hole 11A.

Additionally, the side of the extension arm facing the windscreen may be provided with a cover 21, whereby at least a better protection of the conduit is achieved.

Fig. 5 shows an arrangement of the catheter in the wiper arm mount. Unlike the present disclosure, the conduits 41, 51 are arranged side by side in the wiper arm seat transversely to the axis a, which causes the housing 13A to have a greater width. This results in a reduction in the strength of the wiper arm base, given the same overall width and primary design of the wiper arm base.

The present invention is not limited to the above configuration, and various other modifications may be adopted. While the invention has been described with respect to a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that other embodiments can be devised which do not depart from the scope of the invention as disclosed herein. Accordingly, the scope of the present invention should be limited only by the attached claims.

Claims (9)

1. A wiper arm (2) which can be swung back and forth in an outward direction (O) and a return direction (R) and which comprises:

a wiper arm carrier (10) having a fastening hole (11A) at a first end (11) for attaching an output of an actuator of a wiper arm, the fastening hole having an axis (A);

an extension arm (20) pivotally connected to a second end (12) of the wiper arm mount (10) opposite the first end (11);

a wiper arm end piece (30), the wiper arm end piece (30) being mounted on a side of the extension arm (20) opposite to the wiper arm base (10);

a first nozzle unit (40) equipped with a first conduit (41) and ejecting a cleaning fluid towards a surface to be wiped when the wiper arm oscillates in a return direction (R);

a second nozzle unit (50) equipped with a second conduit (51) and spraying a cleaning fluid towards the surface to be wiped when the wiper arm oscillates in an outward path direction (O);

characterized in that the first conduit (41) and the second conduit (51) are guided one above the other in the wiper arm seat (10) with respect to the axis (A) to a second end of the wiper arm seat (10) pivoted to the extension arm (20).

2. The wiper arm (2) according to claim 1, characterized in that the wiper arm seat (10) has a receptacle (13A) for receiving the first and second conduits (41, 51), which is arranged laterally of the wiper arm seat (10) in the longitudinal direction of the wiper arm seat (10).

3. The wiper arm (2) according to claim 2, wherein the receptacle (13A) is open towards the side of the wiper arm seat (10) facing away from the surface to be wiped.

4. A wiper arm (2) according to claim 3, wherein the wiper arm receptacle (10) has a recess (13B), the side of the recess (13B) facing the surface to be wiped being open.

5. A wiper arm (2) according to any of claims 2 to 4, wherein the receptacle (13A) is provided with a flap (14A, 14B) for preventing a movement of a conduit in a direction transverse to the longitudinal direction of the wiper arm base (10).

6. The wiper arm (2) according to claim 5, characterized in that the wiper arm (2) further has a cover (18) covering the wiper arm seat (10).

7. Wiper arm (2) according to claim 6, characterized in that the cover cap (18) extends above the fixing hole (11A).

8. The wiper arm (2) according to claim 5, wherein the first nozzle unit (40) and the second nozzle unit (50) are mounted on the extension arm (20) or the wiper arm end piece (30), or the first nozzle unit (40) and the second nozzle unit (50) are mounted on the extension arm (20) and the wiper arm end piece (30), respectively.

9. A wiper (1), characterized in that the wiper (1) has a wiper arm (2) according to any one of claims 1 to 8 and a wiper blade (3), the wiper blade (3) being mounted on the wiper arm (2).

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