CN217099906U - Parallel wiper device, cab and excavator - Google Patents

Abstract

The utility model relates to a wiper device, in order to solve the problem that the wiping brush shape of the existing wiper device is fan-shaped and has larger wiping brush dead angles on rectangular glass, the utility model constructs a parallel wiper device, a cab and an excavator, wherein the parallel wiper device comprises two fixed shaft sleeves internally provided with rotating shafts, the inner ends of the rotating shafts are fixed with cranks connected with push rods, and the cranks are connected with a wiper motor through the push rods; the outer ends of the two rotating shafts are correspondingly and fixedly connected with the lower ends of the two scraping arms; the upper end of the scraping arm is provided with a first connecting rod and a scraping brush, and the two ends of the first connecting rod are hinged and the four connecting lines of the rotating central points of the two rotating shafts form a parallelogram. The utility model discloses in, the component that utilizes to scrape arm, first connecting rod and the fixed axle sleeve of installation forms parallelogram link mechanism, first connecting rod and scrape the brush and make the translation when realizing scraping the arm swing, increase under the same condition of scraping arm swing angle and scrape the area that the brush was swept, scrape the brush dead angle on the reduction rectangle glass window.

Description

Parallel wiper device, cab and excavator

Technical Field

The utility model relates to a windscreen wiper device, more specifically say, relate to a parallel windscreen wiper device, driver's cabin and excavator.

Background

Wiper devices are commonly used in cabs (or operator cabins) for cleaning rainwater or dust colored on the corresponding glass. The wiper device is generally mainly composed of a driving device, a wiper arm and a wiper brush, wherein the driving device drives the wiper arm to swing back and forth around a rotating shaft, the wiper brush is arranged at the end part of the wiper arm, and the wiper arm is driven by the wiper arm to swing back and forth in a fan-shaped area in a manner of being attached to a glass window.

The wiper device is usually used for automobiles, the rotating shaft of the wiper arm is positioned at the lower side of the glass window, and two wiper devices can be installed in parallel when the size of the glass in the left-right direction is larger. However, in a construction machine such as an excavator, a front window is long and narrow, a width in a left-right direction is small, and a size in a vertical direction is large, and in a window having such a shape, a conventional wiper device is mounted, and if the wiper device is mounted on a lower side of a front window glass, a wiping brush of the wiper device can only sweep a small area, and thus the front window cannot be cleaned effectively, and it is inconvenient to arrange a driving device of the wiper device on left and right sides of the front window. Even if the attachment position of the wiper arm is arranged on the front side surface, since the wiper brush reciprocates in a fan shape, a large area dead space which cannot be swept by the wiper brush exists on the windshield glass. In addition, since the front window has a large height, the front window is generally divided into two parts, namely, a front upper window and a front lower window, and if the front upper window and the front lower window are to be cleaned, two wiper devices need to be installed, which increases the manufacturing cost.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is that the brush shape of scraping of current windscreen wiper device exists the great problem of scraping the brush dead angle for fan-shaped and on rectangular glass, and provides a parallel windscreen wiper device, driver's cabin and excavator.

The utility model discloses a realize that the technical scheme of its purpose is like: a parallel wiper device is constructed and is characterized by comprising two fixed shaft sleeves, a first rotating shaft and a second rotating shaft are rotatably mounted in the two fixed shaft sleeves, a crank is fixed at the inner end of at least one rotating shaft in the first rotating shaft and the second rotating shaft, and the crank is connected with a wiper motor through a push rod; the outer ends of the first rotating shaft and the second rotating shaft are correspondingly and fixedly connected with the lower ends of the first scraping arm and the second scraping arm; the upper ends of the first scraping arm and the second scraping arm are provided with a first connecting rod and a scraping brush, the two ends of the first connecting rod are respectively hinged with the upper ends of the first scraping arm and the second scraping arm, and the scraping brush is connected with the first connecting rod on a scraping plane of the scraping brush in a non-rotatable manner; and the four connecting lines of the two hinge points at the two ends of the first connecting rod, the first rotating shaft and the rotating center point of the second rotating shaft form a parallelogram. The utility model discloses in, utilize first arm, the second of scraping to scrape the part formation parallelogram link mechanism of arm and first connecting rod and the fixed axle sleeve of installation, first connecting rod and scrape the brush and make the translation when realizing first arm swing of scraping, increase under the same condition of arm swing angle and scrape the area that the brush was swept, scrape the brush dead angle on the reduction rectangle glass window. The wiper blade is non-rotatable in its wiping plane, i.e. the wiper blade and the wiper arm remain rigid in the direction of oscillation of the wiper arm during oscillation of the wiper arm.

In the parallel wiper device, the cranks are fixed at the inner ends of the first rotating shaft and the second rotating shaft; the both ends of second connecting rod and two crank hinged and the distance between the pin joint at second connecting rod both ends equals the distance between two pin joints of first connecting rod tip. The two rotating shafts are provided with the cranks and connected through the second connecting rod, and the wiper motor can drive the first rotating shaft and the second rotating shaft to rotate simultaneously, so that the wiper moves under the common pushing of the first wiper arm and the second wiper arm, and the stress on the single wiper arm is reduced.

In the parallel windscreen wiper device, the scraping brush comprises a framework, windscreen wiper rubber strips arranged on the framework and a U-shaped connecting plate connected with the framework, and the U-shaped connecting plate is fixedly connected with the first connecting rod. Furthermore, a pin fixedly connected with the first connecting rod is arranged on the U-shaped connecting plate, and the first connecting rod is hinged with the first scraping arm through the pin.

In the parallel wiper device, two wiper rubber strips are arranged on the framework at intervals in the length direction.

The utility model discloses a realize that the technical scheme of its purpose is like: a cab is constructed provided with a glass window, characterized by further comprising the aforementioned parallel wiper for wiping the glass window.

In the cab, the two fixed shaft sleeves are fixedly arranged below the glass window, the first scraping arm and the second scraping arm are bent, and when the scraping brush is located at the initial position, the part, located above the bent part, of the first scraping arm is parallel to the scraping brush.

In the cab, the cab is provided with an upper glass window and a lower glass window which are adjacent at the front side, and the wiper rubber strips are arranged at intervals in the length direction of the framework, and are respectively attached to the glass of the upper glass window and the glass of the lower glass window.

The utility model discloses a realize that the technical scheme of its purpose is like: an excavator is constructed which is characterized by having the aforementioned cab.

Compared with the prior art, the utility model discloses in, utilize parallelogram link mechanism, realize first when scraping the arm swing first connecting rod and scrape the brush and make the translation, increase under the same condition of scraping arm swing angle and scrape the area that the brush was swept, scrape the brush dead angle on the reduction rectangle glass window.

Drawings

Fig. 1 is one of the structural views of the parallel wiper device of the present invention.

Fig. 2 shows a second structure of the parallel wiper device of the present invention.

Fig. 3 is a connecting structure diagram between the rotating shaft, the crank and the push rod of the parallel wiper device of the present invention.

Fig. 4 is a connecting structure diagram between the wiper arms and the wiper brushes in the parallel wiper device of the present invention.

Fig. 5 is a schematic structural diagram of the cab of the present invention.

Part names and serial numbers in the figure:

the device comprises a wiper motor 1, a push rod 2, a first fixed shaft sleeve 3, a second fixed shaft sleeve 4, a first wiping arm 5, a second wiping arm 6, a framework 7, a first rotating shaft 8, a second rotating shaft 9, a first crank 10, a second crank 11, a second connecting rod 12, a first connecting rod 13, a pin 14, a U-shaped connecting plate 15, an upper wiper rubber strip 16, a lower wiper rubber strip 17, a cab 18, an upper window glass 19 and a lower window glass 20.

Detailed Description

The following description of the embodiments refers to the accompanying drawings.

As shown in fig. 5, the cab 18 in the present embodiment is a cab of an excavator, and two upper and lower glass windows are provided on the front side thereof, and the two glass windows are adjacent to each other vertically. A parallel wiper device is mounted in the middle of the lower portion of the glass window.

As shown in fig. 1, 2 and 3, the parallel wiper device includes a first fixed bushing 3 and a second fixed bushing 4, which are arranged in parallel and fixedly installed at a lower side of a front window of a cab.

A first rotating shaft 8 and a second rotating shaft 9 are respectively arranged in the first fixed shaft sleeve 3 and the second fixed shaft sleeve 4, the outer end of the first rotating shaft 8 is fixedly connected with the lower end of the first scraping arm 5, and the outer end of the second rotating shaft 9 is fixedly connected with the lower end of the second scraping arm 6.

The inner side ends of the first rotating shaft 8 and the second rotating shaft 9 are respectively fixedly connected with a first crank 10 and a second crank 11, a second connecting rod 12 is connected between the first crank 10 and the second crank 11, two ends of the second connecting rod 12 are rotatably connected with the first crank and the second crank, and the distance between the centers of the two rotating shafts is equal to the distance between two ends of the second connecting rod and the rotation center between the two cranks, so that a parallelogram link mechanism is formed.

The first crank 10 is connected with the push rod 2 through a universal joint, the push rod 2 is connected with the wiper motor 1 through the universal joint, and the wiper motor 1 swings back and forth around the rotating shaft as a rotating center through the push rod 2 and the crank when rotating.

As shown in fig. 4, a first link 13 and a wiper brush are mounted to the upper ends of the first and second wiper arms 5 and 6.

The scraping brush comprises a framework 7, a windscreen wiper rubber strip arranged on the framework and a U-shaped connecting plate 15 connected with the framework 7, a pin 14 fixedly connected with a first connecting rod 13 is arranged on the U-shaped connecting plate 15, and the first connecting rod 13 is hinged with the first scraping arm 5 through the pin 14. The distance between the two ends of the first connecting rod 13 and the rotation center of the scraping arm is equal to the distance between the two ends of the second connecting rod and the rotation center of the crank.

As shown in fig. 5, the first scraping arm 5 and the second scraping arm 6 are bent, and when the scraping brush is located at the initial position, the portion of the first scraping arm located above the bent portion is parallel to the scraping brush.

As shown in fig. 2, two wiper strips are arranged at intervals in the length direction of the frame, the upper wiper strip 16 is attached to the upper window glass 19 of the upper glass window, and the lower wiper strip 17 is attached to the lower window glass 20 of the lower glass window.

In the present embodiment, since the first scraper arm 5, the second scraper arm 6, the first link 13 and the second link 12 form a parallelogram link structure, the scraper brush translates when the scraper arm swings, and the area swept by the scraper brush is the largest when the swing angle of the scraper arm is the same. And the area swept by the scraping brush is similar to a rectangle and is matched with the shape of the window glass of the cab, so that the scraping dead angle on the window glass can be reduced as much as possible. When the wiper device works, the wiper brush moves under the pushing of the first wiper arm and the second wiper arm, so that the stress on the single wiper arm is reduced. The wiper is provided with an upper wiper rubber strip and a lower wiper rubber strip, so that an upper window and a lower window on the front side of the cab can be simultaneously wiped, and the wiper device is fully utilized.

Claims (9)

1. A parallel windscreen wiper device is characterized by comprising two fixed shaft sleeves, wherein a first rotating shaft and a second rotating shaft are respectively and rotatably arranged in the two fixed shaft sleeves; the outer ends of the first rotating shaft and the second rotating shaft are correspondingly and fixedly connected with the lower ends of the first scraping arm and the second scraping arm; the upper ends of the first scraping arm and the second scraping arm are provided with a first connecting rod and a scraping brush, two ends of the first connecting rod are respectively hinged with the upper ends of the first scraping arm and the second scraping arm, and the scraping brush is connected with the first connecting rod on a scraping plane of the scraping brush in a non-rotatable manner; and the four connecting lines of the two hinge points at the two ends of the first connecting rod, the first rotating shaft and the rotating center point of the second rotating shaft form a parallelogram.

2. The parallel wiper device according to claim 1, wherein a crank is fixed to each of inner ends of the first and second rotary shafts; the both ends of second connecting rod and two crank hinged and the distance between the pin joint at second connecting rod both ends equals the distance between two pin joints of first connecting rod tip.

3. The parallel wiper device according to claim 1, wherein said wiper brush includes a frame and a wiper rubber strip mounted on said frame, a U-shaped connecting plate connected to said frame, said U-shaped connecting plate being fixedly connected to said first link.

4. The parallel wiper device as set forth in claim 3 wherein said U-shaped connecting plate is provided with a pin fixedly connected to said first link, said first link being hinged to said first wiper arm by said pin.

5. The parallel wiper device according to claim 3 or 4, wherein two wiper rubber strips are arranged at intervals in a length direction on the skeleton.

6. A cab provided with a glass window, characterized by further comprising a parallel wiper device as claimed in any one of claims 1 to 4 for wiping the glass window.

7. The cab of claim 6, wherein the two fixed bushings are fixedly mounted below the window, the first wiper arm and the second wiper arm are bent, and a portion of the first wiper arm above the bend is parallel to the wiper when the wiper is in the initial position.

8. The cab according to claim 6 or 7, wherein two adjacent upper and lower glass windows are arranged in front of the cab, two upper and lower wiper rubber strips of the wiper are arranged at intervals in the length direction of the framework, and the two upper and lower wiper rubber strips are respectively attached to the glass of the upper and lower glass windows.

9. An excavator characterized by having the cab as claimed in any one of claims 6 to 7.

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