CN212047276U - Wiper arm, wiper and motor vehicle - Google Patents

Abstract

The utility model relates to a wiper arm, wiper and motor vehicles. The wiper arm includes: a wiper arm base (10); an extension arm (20) connected to one end (10B) of the wiper arm base (10); a wiper arm end piece (40) which is provided on the other side of the wiper arm (1) opposite to the wiper arm base (10) and is used for holding a wiper blade; a washing assembly (2) comprising at least a first nozzle (50) and a first conduit (72A) in fluid communication with the first nozzle for guiding and spraying a washing fluid, wherein the wiper arm (1) is further provided with a conduit holder (27) for holding the conduit of the washing assembly (2) at the wiper arm (1).

Description

Wiper arm, wiper and motor vehicle

Technical Field

The utility model relates to a wiper arm, wiper and motor vehicles.

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 the document CN 206704156U. In such a wiper, a nozzle unit and a conduit connecting the nozzle unit and a cleaning fluid storage container are provided. In such a wiper, the nozzle unit is generally arranged centrally above the wiper blade, whereby the distance of the nozzle unit with respect to the wiping area of the windshield glass is shortened, thereby avoiding a deviation of the sprayed cleaning fluid due to the wind during travel. In this case, however, a long length of bridging flexible conduit is required, which is guided along at least a part of the longitudinal extension of the wiper arm. In this case, an atraumatic, permanently stable connection of the flexible line should be ensured.

In particular, when the wiper is provided with guide ducts for swinging in the forward and return directions, respectively, problems such as premature aging, damage, shaking of the ducts, etc. should be avoided.

SUMMERY OF THE UTILITY MODEL

It is therefore an object of the present invention to provide a wiper arm with a guide tube, which avoids the above-mentioned problems.

According to the utility model provides a wiper arm, this wiper arm of scraping includes: a wiper arm mount, in particular, which is connected at one end to an output shaft of a drive mechanism for a wiper arm; an extension arm connected to an end of the squeegee arm base, such as via a pivot connection; a wiper arm end piece which is arranged at the other side of the wiper arm opposite to the wiper arm base and is used for holding the wiper blade; a washing assembly comprising at least a first nozzle and a first conduit in fluid communication with the first nozzle for guiding and spraying the washing fluid, wherein the wiper arm is further provided with a conduit holder for holding the conduit of the washing assembly at the wiper arm. Thereby permanently and stably holding the catheter in the desired position.

According to an embodiment of the invention, the washing assembly further comprises a second nozzle and a second conduit in fluid communication with the second nozzle, wherein the first nozzle and the second nozzle are configured to inject the washing fluid in the going direction and the return direction, respectively. For example, the first nozzle and the second nozzle are configured to spray the washing fluid when the wiper arm swings the wiper blade in the outward and return directions. By spraying the washing fluid in two directions separately, this enables a better cleaning effect.

According to an embodiment of the invention, the catheter retaining portion is shaped separately and mounted at the extension arm. For this reason, the catheter retention portion may be made of a cheaper material to reduce costs.

According to an embodiment of the present invention, the catheter holding portion has an interface joined to a side wall of the extension arm and a receiving portion holding the catheter.

According to the utility model discloses an embodiment, the portion of accomodating is equipped with the notch that is used for introducing the pipe, and the width of this notch is less than the diameter of pipe to prevent that the pipe from deviating from.

According to an embodiment of the invention, the first and second conduits are arranged one above the other in the receiving portion. The direction of the overlap can correspond to the axial direction of the output shaft of the drive mechanism or to the normal direction of the windscreen to be wiped. The width of the extension arm can be reduced.

According to the utility model discloses an embodiment, the inboard of interface is equipped with a pair of notch, and the corresponding position of the lateral wall of extension arm is equipped with the arch, and bellied size matches in the size of notch, and wherein, the notch is opened towards the distolateral of pipe holding portion. By means of such a form-fitting construction, the mounting of the catheter holding part can be realized in a simple manner.

According to an embodiment of the invention, the wiper arm has a plurality of pipe holders which are arranged at least one side wall of the extension arm. More reliable holding of the catheter is achieved by the plurality of catheter holding portions.

According to an embodiment of the present invention, the plurality of tube holding portions are identically configured to reduce cost.

According to an embodiment of the present invention, at least one of the first nozzle and the second nozzle is provided with a penetration portion to reduce a wind resistance acting on the wiper arm when the vehicle travels.

According to another aspect of the present invention, a wiper having the wiper blade described above and a wiper blade held on the wiper blade is provided.

According to a further aspect of the invention, a motor vehicle is proposed, which has a wiper arm or a wiper as described above.

Through the technical scheme of the utility model, when can using the clean windscreen of less clean fluid, can also keep the pipe at wiper arm department with the mode of low cost steadily through the pipe holding portion that sets up, especially avoided the unexpected pine of pipe to take off, rock, damage.

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 arm according to an embodiment of the present invention;

FIG. 2 shows an exploded view of the wiper arm of FIG. 1;

fig. 3 shows a view of a partial section of the wiper arm of fig. 1;

FIG. 4 shows a cross-sectional illustration along line E-E of FIG. 3; and

fig. 5a, 5b and 5c each show a different illustration of an embodiment of a pipe holder for a wiper arm.

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 view of a wiper arm according to the invention. The wiper arm 1 includes: a wiper arm base 10 connected at one end 10A to an output (e.g., an output shaft) of a drive mechanism for a wiper arm, such as a motor or at least including a motor; an extension arm 20 pivotally connected to the other end portion 10B of the wiper arm base 10 and forming a middle portion in the longitudinal direction of the wiper arm; a wiper arm end piece 40, which is on the other side of the wiper arm 1 opposite the wiper arm carrier 10 and serves to hold a wiper blade, not shown here.

The wiper arm 1 is furthermore equipped with a washing assembly 2 for spraying washing fluid towards the windscreen, which washing assembly comprises a nozzle assembly and a duct unit 70 for guiding the washing fluid, which duct unit is guided in the longitudinal extension of the wiper arm 1.

The wiper arm base 10 is typically die cast from aluminum or an aluminum alloy. The end 10A of the wiper arm carrier 10 serving as the fastening side has a cylindrical bore 11 for a shaft of a drive mechanism, not shown, wherein the shaft serving as the output of the drive mechanism is fastened in this cylindrical bore 11 in a rotationally fixed manner, so that the drive mechanism transmits the drive movement to the wiper arm via this shaft, so that the wiper arm can be pivoted back and forth in the forward and return direction.

The wiper arm base 10 is connected with the extension arm 20 via a pivot 16 at the other end 10B opposite to the end 10A. The pivot 16 passes through the wiper arm carrier 10 and the extension arm 20 transversely to the longitudinal extension of the wiper arm.

A channel 12 for the duct unit 70 of the washing assembly 2 is also provided in the wiper arm mount 10. The channel 12 can also be seen as extending in a longitudinal direction, i.e. from one end facing the end 10A to the other end 10B and leading to the extension arm 20, so that the catheter unit 70 can be introduced into the extension arm 20.

In the illustrated example, the channel 12 is arranged laterally over part of the longitudinal section of the wiper arm mount 10, thereby minimizing the strength influence on the wiper arm mount 10. It is noted that the channel may also be arranged in the wiper arm seat in other suitable ways, as long as the catheter unit can be guided to the extension arm.

The cover 13 is disposed on the upper side of the wiper arm base 10. For example, the cover 13 is rotatably arranged at one end at the pivot point of the wiper arm seat and the extension arm. The cover is provided with a not shown structure for limiting so that the cover 13 can be simply fixed at the wiper arm base 10. The wiper arm base together with the duct unit 70 is covered by the cover 13. If necessary, the cover 13 may extend over the cylindrical hole 11 so as to cover the output shaft in the cylindrical hole 11.

The extension arm 20 can likewise be considered an elongate member, which is, for example, a sheet metal part. The extension arm 20 has a U-shaped cross-section over substantially its entire longitudinal extension. To this end, the extension arm 20 may have an upper wall portion 21A and side walls 21B, 21C on either side of the upper wall portion. In the mounted state, the both side walls extend from the edge of the upper wall portion 21A toward the side facing the windshield glass, respectively. The upper wall portion 21A should be aerodynamically shaped to reduce the load of the wind on the extension arm as the vehicle travels.

At the connecting portion of the wiper arm base 10 and the extension arm 20, the other end portion 10B of the wiper arm base 10 is located between the inner walls of the side walls 21B, 21C of the one end portion 20A of the extension arm 20. The above-mentioned both ends of the pivot shaft 16 connecting the wiper arm base 10 and the extension arm 20 may be snappingly applied to the outer walls of the side walls 21B, 21C by making the outer diameter of both ends of the pivot shaft 16 larger than the inner diameter of a not-shown through-hole in the side wall of the extension arm, thereby enabling the rotation of the wiper arm base 10 relative to the extension arm 20.

A spring element 23 is arranged in the extension arm 20 for applying a preload to the extension arm 20 that deflects the extension arm in the direction of the windscreen so that the strip of wiper blades rests against the windscreen. The first end 23A of the spring element 23 is connected to the wiper arm seat and the second end 23B is held at the extension arm or a member fixedly connected to the extension arm, wherein in the mounted state of the spring element 23 it is elongated with respect to the original state, thereby applying the above-mentioned preload. For this purpose, for example, a web 25 projecting toward the other side wall 21C is provided on the edge of the side wall 21B of the extension arm 20, said web having a hole 25A into which the second end 23B of the spring element 23 engages. In the section of the wiper arm mount 10 between the inner walls of the side walls 21B, 21C of the extension arm 20, a pin 17 is arranged, on which a first end 23A of the spring element 23 is hooked via a C-shaped part 24.

The latch shaft 17 is preferably provided separately and then mounted at the end 10B. The open side of the C-shaped member 24 faces the upper wall portion 21A of the extension arm 20.

In the mounted state of the spring element 23, the end 10B of the wiper arm seat 10 is in contact with the extension arm 20 with its side facing the upper wall 21A of the extension arm 20 under the action of the spring element. The end portion 10B is divided in the width direction of the wiper arm base 10 into a first portion 10B1 and a second portion 10B2, wherein the front end of the first portion 10B1 is U-shaped, which prevents the C-shaped member 24 from touching the front end of the first portion 10B1 when the extension arm is rotated about the pivot 16 away from the windscreen, for example, for blade replacement. In other words, the spring element provided should not interfere with the relative movement of the wiper arm base 10 and the extension arm 20 in a predetermined direction. The second portion 10B2 forms part of the passageway for the catheter unit 70, i.e., the catheter unit 70 passes through the second portion 10B2 into the extension arm and is received within the extension arm 20 in the interior space formed by the upper wall and the two side walls of the extension arm 20.

The extension arm 20 is fixedly connected at its other end 20B to the wiper arm end piece 40.

As can be seen particularly clearly in fig. 1 and 2, in particular the extension arm 20, the spring element 23 occupies a partial section of the side of the extension arm 20 facing the wiper arm seat 10, the extension arm 20 having a narrowing width over its entire length.

The wiper arm end piece 40 can likewise be a sheet metal part, which has a fastening section 41 connected to the extension arm 20, an intermediate section 42 and a mounting section 43. The extension arm 20 at the end 20B at least partially encloses the fixed section 41 of the wiper arm end piece 40. The mounting section is used for mounting a wiper blade.

In the example shown, the mounting section 43 is in the form of a clevis. The mounting section 43 may have other forms including, but not limited to, a J-hook, an N-hook, an E-hook, a bayonet type cartridge, an internally locking cartridge, a side locking cartridge, and the like. The corresponding connection points of the wiper blades have a structure which is matched to the corresponding mounting section.

The wiper arm end piece 40 also extends overall in the longitudinal direction, but the fastening section 41 is offset from the mounting section 43 in a direction transverse to the longitudinal direction, the offset section forming the intermediate section 42. Thus, the wiper arm end piece 40 may be considered as a zigzag-shaped elongated piece.

The nozzle of the nozzle assembly of the wiper arm washing assembly 2 may be mounted at the extension arm 20 and/or the wiper arm end piece 40. In the example shown, two nozzles are shown which are respectively mounted on the extension arm 20 and the wiper arm end piece 40 and which are respectively used to impinge a cleaning fluid, for example glass water, on the windscreen towards the approach side and the return side of the wiper blade when the wiper blade is oscillating in the approach direction and the return direction.

In the drawing, a first nozzle 50 and a second nozzle 80 are shown for the outward and return directions, respectively.

The first nozzle 50 is arranged at the wiper arm end piece 40 for spraying in the outward direction. The first nozzle 50 comprises at least one nozzle unit, a first junction 54 for an end 73A of a first conduit 72A and a bridging channel 52 therebetween.

The first nozzle 50 is bent and has a first bending section 51 and a second bending section 55, wherein the bridge channel 52 is arranged at the first bending section 51 and the nozzle unit is arranged at the second bending section 55. The first nozzle 50 is mounted at the wiper arm end piece 40, for example by snapping. Of course, other mounting means are possible, such as gluing, etc.

In this example, the first nozzle 50 has a first nozzle unit 56A that ejects fluid toward one end portion of the wiper blade, a second nozzle unit 56C that ejects fluid toward the opposite other end portion of the wiper blade, and a third nozzle unit 56B that ejects fluid toward the windshield. Preferably, the fluid ejection direction of the corresponding nozzle unit of the first nozzle 50 is adjustable.

The first nozzle 50 is also provided with a penetration portion 57 through which air passes during vehicle travel, thereby reducing wind resistance.

The second nozzle 80 has a fitting 81 for the end 73B of the first conduit 72B in fluid communication with the first nozzle 50.

The second nozzle 80 may also be provided with a penetration portion as necessary to allow air to pass therethrough during vehicle travel, thereby reducing wind resistance.

The second nozzle 80 further has a fourth nozzle unit 81A that ejects fluid toward one end portion of the wiper blade, a fifth nozzle unit 81C that ejects fluid toward the opposite other end portion of the wiper blade, and a sixth nozzle unit 81B that ejects fluid toward the windshield G.

Preferably, the second nozzle 80 also has a trailing arm 82 for the first conduit 71A.

Preferably, the fluid ejection direction of the corresponding nozzle unit of the second nozzle 80 is also adjustable.

In order to securely and stably hold the pipe unit 70 for the nozzle in a predetermined direction in the inner space defined by the extension arm, a pipe holding portion 27 is provided. The conduit holding part can prevent the conduit unit from shaking and falling out of the inner space under the condition of ensuring that the conduit unit is not damaged particularly during the operation process of the wiper arm, and can ensure the service life of the conduit unit as long as possible.

Fig. 5 shows an embodiment of the tube holder 27 in three different views a, b, c, the tube holder 27 being embodied separately and mounted at the extension arm 20, wherein fig. a is a perspective view of the tube holder 27, fig. b is a front view of the tube holder 27, and fig. c is a sectional view along the line F-F in fig. b.

The catheter retaining portion 27 has a hub 277 engaged at one side wall of the extension arm 20 and a receptacle 276 that retains the catheter. As can be seen from fig. a, the interface 277 and the receptacle 276 are arranged side by side. For this purpose, the interface 277 and the accommodating portion 276 may share the bottom 274 and the first wall portion 272 extending from the bottom 274, and the second wall portion 271 and the third wall portion 273, which are on the same side as the first wall portion 272, are provided on both sides of the first wall portion 272, respectively. A fourth wall 275 is provided on the other side of the first wall 272 and the second wall 271 so as to face the bottom 274. Therefore, the accommodating portion 276 is formed by the bottom 274, the first wall portion 272, the second wall portion 271, and the fourth wall portion 275, and the interface 277 is formed by the bottom 274, the first wall portion 272, and the third wall portion 273.

The accommodating portion 276 is open on both sides in a direction corresponding to the longitudinal extension of the duct unit 70, so that the duct unit 70 can pass through the accommodating portion 276. Preferably, the housing 276 is also provided with a slot 279 for introducing the catheter, the width of which is smaller than the diameter of the catheter, which makes it easier to introduce the catheter unit 70 into the housing. In the illustrated example, the notch is arranged at the fourth wall portion 275, but the notch may also be provided at any other wall portion forming the accommodating portion 276 as long as introduction of the duct unit can be facilitated. Thus, in examples not shown, notches may also be provided at the bottom 274, the first wall 272, or the second wall 271.

In addition to being open on both sides in a direction corresponding to the longitudinal extension of the catheter unit 70, the interface 277 is also open on the side opposite the bottom 274, which enables the catheter holding portion 27 to be held at the side wall of the extension arm by the interface 277. The width of interface 277 corresponds to the width of the side wall of the extension arm.

To prevent the conduit holding portion 27 from falling off the side wall of the extension arm, as seen in fig. 5b and c, an opposed notch 278 is left inside one wall 278 of the two vertical walls forming the interface. With reference to the direction corresponding to the longitudinal extension of the duct unit 70, the recess is open on one side and closed on one side. Correspondingly, projections 28 are formed at the side walls of the extension arms (as can be seen particularly clearly from the enlarged detail of the region D in fig. 2), the dimensions and spacing of which are matched to those of the recesses, thereby ensuring a simple and stable connection of the recesses to the side walls.

Of course, the notch 278 may also be provided at the inner side of the opposite other wall portion forming the interface. The projections also vary adaptively.

The tube holder 27 is preferably integrally formed from plastic by injection molding. Demolding is also particularly advantageous, in particular when the recess is designed in the manner as explained above.

When the conduit unit 70 has two conduits for the going side and the return side, they are preferably arranged in the accommodating portion 276 in the axial direction of the output shaft (see fig. 4). This enables the width of the extension arm to be reduced to achieve a compact structure and reduce the load on the drive mechanism.

Particularly when the length of the pipe unit 70 is long, the wiper arm 1 may have a plurality of pipe holders 27 arranged at least one side wall of the extension arm 20.

Preferably, the plurality of conduit retainers 27 may be identically configured to reduce manufacturing and warehousing costs.

The conduit retaining portion 27 is particularly mounted at the section of the extension arm where the spring is provided. Thereby completely preventing the catheter from being damaged which may be caused by an accidental contact with the spring.

It is noted that the above-described first nozzle 50 and second nozzle 80 of the washing assembly may alternatively be used.

It is further noted that the wiper arm end piece and the extension arm may also be connected indirectly, i.e. via another component.

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 (12)

1. A wiper arm (1), the wiper arm (1) comprising:

a wiper arm base (10);

an extension arm (20) connected to one end (10B) of the wiper arm base (10);

a wiper arm end piece (40) provided on the other side of the wiper arm (1) opposite to the wiper arm base (10);

a washing assembly (2) comprising at least a first nozzle (50) and a first duct (72A) in fluid communication with said first nozzle (50) to guide and spray a washing fluid,

characterized in that the wiper arm (1) is further provided with a conduit holding portion (27) to hold the conduit of the washing assembly (2) at the wiper arm (1).

2. The wiper arm (1) according to claim 1, wherein said washing assembly (2) further comprises a second nozzle (80) and a second duct (72B) in fluid communication with said second nozzle, wherein said first nozzle (50) and said second nozzle (80) are configured to eject washing fluid in a return direction and a return direction, respectively.

3. Wiper arm (1) according to claim 2, characterized in that the conduit holding part (27) is separately shaped and mounted at the extension arm (20).

4. A wiper arm (1) according to claim 3, wherein the conduit holding portion (27) has an interface (277) joined at a side wall of the extension arm (20) and a receiving portion (276) holding the conduit.

5. Wiper arm (1) according to claim 4, characterized in that the receptacle (276) is provided with a slot (279) for introducing the duct, the width of which is smaller than the diameter of the duct.

6. The wiper arm (1) according to claim 4, wherein the first duct (72A) and the second duct (72B) are arranged one above the other in the receptacle (276).

7. Wiper arm (1) according to claim 4, characterized in that the interface (277) is provided on its inside with a pair of recesses (278), the side walls of the extension arm (20) being provided at corresponding points with projections (28), the dimensions of the projections (28) matching the dimensions of the recesses (278), wherein the recesses (278) are open towards the end side of the conduit holding part (27).

8. The wiper arm (1) according to any of claims 1 to 7, characterized in that the wiper arm (1) has a plurality of conduit holders (27) arranged at least one side wall of the extension arm (20).

9. The wiper arm (1) according to claim 8, wherein the plurality of conduit holders (27) are identically configured.

10. The wiper arm (1) according to any of claims 2 to 7, wherein at least one of the first nozzle (50) and the second nozzle (80) is provided with a penetration (57).

11. A wiper, characterized in that it has a wiper arm (1) according to any one of claims 1 to 10 and a wiper blade held on the wiper arm (1).

12. A motor vehicle, characterized in that it has a wiper arm (1) according to any one of claims 1 to 10 or a wiper according to claim 11.

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