CN118254724A

CN118254724A - Non-climbing type windscreen wiper and vehicle

Info

Publication number: CN118254724A
Application number: CN202211685049.6A
Authority: CN
Inventors: 李艳杰; 许小芳; 高岡哲士; 吕超
Original assignee: Caterpillar SARL
Current assignee: Caterpillar SARL
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2024-06-28

Abstract

The invention relates to a non-climbing wiper blade (1) comprising a wiper blade body (11, 12) which is pivotally mounted on a cab frame (2) of a vehicle and a support (13) for supporting the wiper blade body against entry into an interior space of the cab, wherein the support comprises a first bracket (131) which is fastened to the cab frame (2) and a second bracket (132) which is fastened to the wiper blade body, the first bracket and the second bracket being configured to be able to overlap each other at least partially when the wiper blade is in a rest position. The wiper blade can reduce the influence on the driver's view and can provide effective support for the wiper blade unit of the wiper blade. The invention also relates to a vehicle comprising such a non-climbing wiper blade.

Description

Non-climbing type windscreen wiper and vehicle

Technical Field

The present invention relates to a wiper blade, and more particularly, to a non-climbing wiper blade that can be used in a cab of a vehicle such as an excavator. The invention also relates to a vehicle, in particular a construction machine such as an excavator, comprising such a non-climbing wiper blade.

Background

The windscreen wiper can be used for timely scraping sundries such as water drops on the outer surface of the front windshield of the vehicle cab so as to ensure driving safety. It is known to use climbing type wipers and non-climbing type wipers in construction machines such as excavators. The wiper blade unit of a climbing wiper blade and the wiper arm carrying the wiper blade unit can sweep a fan-shaped area of the surface of the windshield during operation and can jump back onto the upright of the cab and be supported against the upright during rest, so that the wiper blade has two working areas. The wiper blade unit and the wiper arm of the non-climbing wiper blade can sweep the fan-shaped area of the surface of the windshield during operation and can return to the starting point of the fan-shaped area (i.e. still rest on the windshield) during rest, so that the wiper blade has an operating range. In contrast, the actuating mechanism and the control logic of the non-climbing type windscreen wiper are simpler, so that the cost is lower, and the non-climbing type windscreen wiper is widely applied.

Since most front windshield windows of an excavator cab can be opened, for a non-climbing wiper blade whose blade unit normally rests on a windshield at rest, it is necessary to provide support for the blade unit when the front windshield window is opened to ensure that it does not fall into the interior space of the cab, causing safety risks to the driver and failure to close the front windshield window or damage the wiper blade. However, since the blade unit is located on the front windshield, that is, in the field of view of the driver, an improper support structure may significantly affect the driver's vision.

Accordingly, it is desirable to provide effective support for a non-climbing wiper blade so as to prevent a portion thereof such as a wiper blade unit from falling into a cab on the one hand, and to minimize an influence on a driver's view on the other hand.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art described above, and to providing a non-climbing wiper blade that is cost-effective, has a long service life, and has little impact on the driver's field of view.

In particular, the present invention provides a non-climbing wiper blade comprising a wiper body secured to a cab frame of a vehicle and a support for supporting the wiper body against ingress into an interior space of the cab, wherein the support comprises a first bracket secured to the cab frame and a second bracket secured to the wiper body, and wherein the first bracket and the second bracket are configured to at least partially overlap one another when the wiper blade is in a rest position.

The present invention uses a crossed double-bracket design to support the wiper blade, which can be mounted on the a-pillar of the cab and the wiper blade unit of the wiper blade, respectively, and extend towards each other, so that the two brackets can overlap at least partially in the area between the a-pillar and the wiper blade unit of the wiper blade in the rest position, whereby a greater effective support length and thus an effective support for the wiper blade unit of the wiper blade over the full life cycle can be provided with reduced impact of the brackets on the driver's view.

In another aspect, the invention also relates to a vehicle comprising such a non-climbing wiper blade. The vehicle may in particular be a working machine, such as an excavator.

Drawings

The details of the invention and its advantages are understood from the following description with reference to the following drawings in combination with specific embodiments. In the drawings:

Fig. 1 shows a non-climbing wiper blade according to a preferred embodiment of the present invention in a view from the front of a cab;

Fig. 2 shows a non-climbing wiper blade according to a preferred embodiment of the present invention as seen from above in a perspective view; and

Fig. 3 is a detailed perspective view of the non-climbing wiper blade shown in fig. 2, as seen from the side.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings, which are intended to explain the general inventive concept and should not be construed as limiting the present invention.

The direction or orientation in the present invention is defined with reference to a state when the vehicle is normally parked or operating, wherein "up" refers to a direction toward the sky when the vehicle is parked, that is, an upward direction in fig. 1, "front" refers to a direction when the vehicle is normally traveling, that is, a direction in which the head or cab of the vehicle is directed, and "left" and "right" refer to directions in which the left hand side and the right hand side of the driver facing the front of the vehicle are located, respectively. The direction from top to bottom or from bottom to top is referred to as the "vertical direction". The direction from left to right or from right to left is referred to as the "lateral direction".

The non-climbing wiper blade of the present invention is particularly applicable to a construction machine type vehicle such as an excavator. The front windscreen of such a vehicle cab is generally flush with or at least does not protrude from the cab frame, has a large aspect ratio (i.e. its height is relatively large and its width is relatively small), and may comprise an openable part, in particular may be divided into upper and lower parts, wherein the upper part has a large area and is movable to open, and the windscreen wiper is mainly intended for cleaning the outer surface of said upper part.

Of course, the wiper blade of the present invention may also be applied to other occasions, such as other types of vehicles, or even stationary machines having a glass panel that needs cleaning, etc.

Embodiments of the present invention will be described in detail below in a case of being applied to an excavator.

Referring to fig. 1, the wiper blade 1 of the present invention may include a wiper arm 11 and a wiper blade unit 12 connected to each other. In the present invention, the main components of the wiper blade 11 and the blade unit 12, etc. for performing the wiping cleaning function may be referred to as a "wiper body".

The wiper arm 11 can be mounted on the cab frame 2 of the excavator, in particular on a column of the cab frame 2, for example the right a-column 21, and can be pivoted relative to the frame 2 or more specifically relative to the a-column 21.

The blade unit 12 may be mounted at a free end of the wiper arm 11 and is movable with the pivotal swing of the wiper arm 11, thereby sweeping over a fan-shaped area of a front windshield (not shown) of a cab so as to effect removal of foreign matters such as water drops on an outer surface of the front windshield. Advantageously, as shown in fig. 1, the wiper blade unit 12 may be fitted in a catch groove or a catch sleeve at the end of the wiper arm 11 and extend substantially in the vertical direction in the rest state. More specifically, as shown in fig. 3, the blade unit 12 may include an arcuate blade bridge 121 and a blade 122 mounted on the blade bridge 121. The wiper arm 11 may be hinged to the wiper blade bridge 121.

In particular, the wiper blade of the present invention may be arranged such that its wiper blade body, in particular the wiper blade unit 12, may stay in its position at the working start point, which is at a distance from the upright 21 of the cab frame 2, when the wiping operation is stopped. That is, the blade unit 12 can rest at a constant position with respect to the front windshield of the cab in the rest state. In this way, a low-cost 360 ° rotary motor can be used as the actuating mechanism of the wiper arm 11.

The wiper blade 1 of the invention may further comprise a support 13, which support 13 may be configured for supporting the wiper body and in particular the wiper blade unit 12 on the cab frame 2 to prevent the wiper body and in particular the wiper blade unit 12 from entering the interior space of the cab.

The support 13 may include a first bracket 131 and a second bracket 132. The first bracket 131 may be fixed to the cab frame 2, and the second bracket 132 may be fixed to the wiper body. The first bracket 131 and the second bracket 132 are configured to overlap or overlap each other.

The first bracket 131 may be formed, for example, from a sheet metal or sheet metal, fastened to the cab frame 2, in particular to the right a-pillar 21, by means of screws, for example, and extends in the transverse direction toward the second bracket 132 or toward the wiper body.

The second bracket 132 may be formed, for example, from a sheet metal or sheet metal, is screwed or snapped onto the wiper body, and extends in the transverse direction toward the first bracket 131 or toward the right a-pillar 21 of the cab frame 2.

The positions of the first and second brackets 131 and 132 and their extension dimensions in the lateral direction may be designed such that there is a portion of the two brackets 131, 132 overlapping each other in the lateral direction.

Preferably, the second bracket 132 may be fixed near a portion where the wiper arm 11 is connected to the wiper unit 12, for example, on a clamping groove or a clamping sleeve portion of the wiper arm 11 for receiving the wiper unit 12, or on a portion of the wiper bridge 121 near the wiper arm 11.

Still referring to fig. 1, the first bracket 131 is preferably formed of a U-shaped metal plate, the bottom portion of which can be fastened to the right a-pillar 21 of the cab frame 2 by screws, and the two leg portions of which can be located closer to the front windshield or to the interior space of the cab than the bottom portion thereof, thereby avoiding interference with the movement of the wiper arm 11 or the wiper blade unit 12 when the wiper blade is in operation.

In this case, it is preferable that one leg of the first bracket 131, in particular the upper leg, is offset forward with respect to the other leg, i.e. in a direction away from the front windshield. In other words, the first bracket 131 may be configured such that one leg (upper leg) thereof is farther from the inner space of the cab than the other leg (lower leg).

It is contemplated that the second bracket 132 may also have a similar configuration as the first bracket 131. That is, the second bracket 132 may also have a U-shaped overall shape, and two leg portions of the U-shape of the second bracket 132 may be disposed so as to be offset in the front-rear direction with respect to one another.

Advantageously, as can be seen clearly in fig. 2, the first bracket 131, in particular the portion of the first bracket 131 intended to overlap the second bracket 132 (e.g. the two legs in the previous example), can be offset relative to the corresponding portion of the second bracket 132 in a direction towards the front windscreen or towards the interior space of the cab. In other words, the first bracket 131 (especially the portion thereof intended to overlap) may be closer to the interior space of the cab than the second bracket 132 (especially the portion thereof intended to overlap).

As shown in fig. 2, it is also advantageous to extend the first bracket 131 in a transverse direction such that the end of the first bracket 131 is flush with the wiper body in the rest position. The support 13 according to the invention thus provides as much support as possible for the wiper body without having as much influence on the driver's field of view as possible.

In this case, as shown in fig. 3, when the wiper body is in the rest position, the lateral end of the first bracket 131 can be inserted into the gap between the blade bridge 121 and the blade 122 of the blade unit 12 without going beyond the blade bridge 121 and the blade 122 from the other side in the lateral direction.

Finally, it should be noted that the support 13 of the non-climbing wiper blade of the invention may be located entirely outside the cab. That is, the first bracket 131 and the second bracket 132 of the support member 13 are both located in front of the outer surface of the front windshield.

INDUSTRIAL APPLICABILITY

The non-climbing wiper blade 1 of the present invention can provide effective support for the wiper body when the front windshield is opened, thereby preventing the wiper body, particularly the wiper blade unit 12, from continuing to drop down into the interior space of the cab.

The invention reduces the impact on the driver's field of view by using two intersecting shorter brackets on the one hand and ensures an effective support of the wiper body on the other hand, compared to solutions where only longer supports are provided on the frame of the cab or only on the wiper body. The invention solves the problem that the overlong cantilever bracket is easy to bend, and simultaneously avoids the problem that effective support cannot be provided at the later stage of the service life of the windscreen wiper due to the reset position deviation caused by the abrasion of the transmission mechanism in the windscreen wiper actuating mechanism.

The U-shaped bracket design of the support 13 of the present invention prevents the support from inadvertently buckling by personnel standing outside the cab and causing failure of the support. In particular, the likelihood of the support being pulled inadvertently is greatly reduced due to the smaller size of the legs of the U-shape. Moreover, since the bracket has two legs, even if one leg is pulled to be dislocated, the other leg can still normally function as a support.

By designing the U-shaped first bracket 131 (or the second bracket 132) of the support member 13 such that its two legs are offset back and forth (i.e. one leg is farther from the front windshield or the cabin interior space than the other leg), the wiper body and in particular the wiper blade unit 12 can be pushed as far as possible away from the cabin interior space when the two brackets 131, 132 are engaged, thereby avoiding interference with the wiper blade unit of the wiper blade when the front windshield is closed.

Although the present general inventive concept has been described in connection with embodiments, it will be appreciated by those skilled in the art that changes and modifications may be made to these embodiments without departing from the principles and spirit of the general inventive concept.

Claims

1. A non-climbing wiper blade (1), comprising:

a wiper body pivotally swingably mounted on a cab frame (2) of a vehicle,

A support member (13) for supporting the wiper body to prevent it from entering the inner space of the cab,

Characterized in that the support comprises a first bracket (131) fixed on the cab frame (2) and a second bracket (132) fixed on the wiper body,

Wherein the first and second brackets are configured to at least partially overlap each other when the wiper blade is in a rest position.

2. The non-climbing wiper blade (1) according to claim 1, characterized in that the wiper blade body comprises a wiper arm (11) and a wiper blade unit (12) connected to each other, the first bracket (131) and the second bracket (132) being configured to extend towards each other in a lateral direction so as to at least partially overlap each other in a region between the cab frame (2) and the wiper blade unit (12) of the wiper blade in a rest position.

3. The non-climbing type wiper blade (1) according to claim 2, wherein the second bracket (132) is fixed at a connection portion of the wiper arm (11) and the wiper blade unit (12).

4. A non-climbing wiper blade (1) according to one of the claims 1-3, characterized in that the first bracket (131) has a U-shaped overall shape and comprises two legs intended to overlap the second bracket (132).

5. The non-climbing wiper blade (1) according to claim 4, wherein an upper one of the two legs is configured to be farther from an inner space of the cab than the other leg.

6. A non-climbing wiper blade (1) according to one of the claims 1 to 3, characterized in that the first bracket (131) is configured closer to the interior space of the cab than the second bracket (132).

7. A non-climbing wiper blade (1) according to one of the claims 1-3, characterized in that the first bracket (131) is configured such that its lateral extremity can be flush with the wiper blade body in the rest position.

8. A non-climbing wiper blade (1) according to one of the claims 1-3, characterized in that the first bracket (131) is fixed to the a-pillar (21) of the cab frame (2).

9. Vehicle comprising a cab, characterized in that the vehicle further comprises a non-climbing wiper blade (1) according to one of claims 1-8, wherein the non-climbing wiper blade is mounted on the cab.

10. The vehicle of claim 9, wherein the vehicle is a work machine.

11. The vehicle of claim 10, wherein the vehicle is an excavator.