JP2020032843A - Wiper device for construction machine - Google Patents

Abstract

To provide a wiper device for a construction machine which is provided above a windshield of an operator cab of a construction machine, prevents or inhibits an upper visual field from being limited, and prevents rainwater of a ceiling of the operator cab from flowing into the windshield.SOLUTION: A wiper device for a construction machine includes: a bracket 67 fixed to the upper side of a frame 51 of an operator cab 5 of a construction machine 1; and a wiper body 63 which is swingably attached to the bracket 67 and can wipe water droplets of a windshield 53 of the operator cab 5. An upper edge of the bracket 67 is integrally provided with an eaves part 69 extending to the front of the operator cab 5.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a wiper device for a construction machine.

  BACKGROUND ART Conventionally, a wiper device provided on an outer surface of a cab of a construction machine is known (for example, see Patent Document 1). There is also known a construction machine provided with an eaves member above the outer surface of the cab in order to prevent rain from entering the cab (for example, see Patent Document 2).

JP 2003-170812 A JP-A-2004-114850

  On the windshield of the cab of a construction machine, rainwater adhering to the ceiling of the cab may flow into the windshield, making it difficult to see the front. By installing an eaves member above the cab windshield, rainwater on the ceiling can be prevented from flowing into the windshield.However, when a wiper device is provided above the cab windshield, the wiper device and the eaves Since the members are located above the windshield, the members are concentrated above the windshield, and there is a possibility that the upper view from the driver's cab may be restricted.

  In view of the above, the present invention is a wiper device provided above a windshield of a cab of a construction machine, which prevents or suppresses that an upper view is restricted, and that a ceiling of a cab of a cab is provided. An object of the present invention is to provide a wiper device for a construction machine that can prevent rainwater from flowing into a windshield.

[1] To achieve the above object, the present invention provides:
A bracket fixed to a mounting surface that is an upper edge of a frame of a cab of the construction machine and extends laterally along an upper edge of a windshield;
A wiper body swingably attached to the bracket and capable of wiping water droplets attached to an outer surface of the windshield of the cab,
With
An eave portion extending toward the front of the cab is integrally provided on an upper edge of the bracket,
The eave portion includes an upright portion extending upward from an upper edge of the bracket, and an eave body portion extending forward from an upper edge of the upright portion.

  According to the present invention, since the eave portion is provided integrally with the upper edge of the bracket, the wiper device with the eave portion can be made compact. Therefore, even with the wiper device provided above the windshield of the cab of the construction machine, it is possible to prevent or suppress the upper visibility from being restricted and to allow rainwater on the ceiling of the cab to flow into the windshield. It is possible to provide a wiper device for a construction machine capable of preventing the occurrence of the above.

  In addition, since the eave portion has an upright portion extending upward from the upper edge of the bracket, rainwater accumulated on the ceiling of the driver's cab is prevented by the upright portion from flowing into the windshield. Good visibility can be maintained.

[2] In the present invention,
The bracket is provided with a pair of left and right lighting devices,
The construction machine is a hydraulic shovel,
The hydraulic shovel is provided with a working machine beside the cab,
It is preferable that, of the pair of lighting devices, the lighting device on the working machine side and the eaves portion are arranged so as to be shifted in a direction away from the working machine so as to avoid interference with the working machine.

  According to this configuration, it is possible to prevent the wiper device including the lighting device from interfering with the work implement.

FIG. 1 is an explanatory view showing an embodiment of a construction machine to which a wiper device of the present invention is attached. FIG. 2 is a perspective view showing a state where the wiper device is attached to the cab of the embodiment. FIG. 2 is an exploded perspective view showing the wiper device according to the embodiment. FIG. 2 is a perspective view showing the wiper device of the present embodiment from below. Explanatory drawing which shows the interference area of the working machine of this embodiment and a lighting device.

  A construction machine to which a wiper device according to an embodiment of the present invention is attached will be described in detail with reference to the drawings. As shown in FIG. 1, a construction machine 1 according to the present embodiment is a hydraulic shovel, and includes a traveling body 3 having an endless track 2 and a revolving body 4 that is pivotably provided on the traveling body 3. .

  The revolving superstructure 4 includes an operator cab 5 provided on the front left side and a machine room 6 provided adjacent to the rear of the operator cab 5. The machine room 6 is provided with a power source such as an electric motor or an internal combustion engine (not shown) and an oil pump driven by the power source. The construction machine 1 drives the hydraulic motor using the hydraulic pressure output from the oil pump, and drives the endless track 2 of the traveling body 3 using the power output from the hydraulic motor. The power source may be a diesel engine, a gasoline engine, or may use both an internal combustion engine and an electric motor.

  A base end of a working machine 7 is connected to the front right side of the revolving superstructure 4 at a position next to the cab 5 and in front of the machine room 6.

  The work machine 7 includes a boom 8 whose base end is rotatably connected to the revolving unit 4, an arm 9 whose base end is rotatably connected to the distal end of the boom 8, and a rotatable end of the arm 9. And a bucket 10 whose base end is freely connected. The end of the rod 11a of the boom hydraulic cylinder extending from the revolving unit 4 is connected to the middle part of the boom 8, and the boom 8 is rotated by moving the rod 11a of the boom hydraulic cylinder forward and backward. The proximal end of the arm 9 is connected to the distal end of a rod 12a of an arm hydraulic cylinder 12 extending from the boom 8, and the arm 9 is rotated by moving the rod 12a of the arm hydraulic cylinder 12 forward and backward. The proximal end of the bucket 10 is connected via a link 14 to the distal end of a rod 13a of a bucket hydraulic cylinder 13 extending from the arm 9. By moving the rod 13a of the bucket hydraulic cylinder 13 forward and backward, the bucket 10 is moved. Rotate.

  The cab 5 is provided with an operation unit (not shown) for an operator to operate the turning of the work implement 7, the turning of the revolving unit 4, and the traveling of the traveling unit 3.

  The endless track 2 has a sprocket 21a, is driven by a hydraulic motor, and has a starting wheel 21 located at a rear end, a floating wheel 23 located at a front end, a rolling wheel 25, a starting wheel 21, a floating wheel 23, And a crawler plate 27 wound around the wheel 25 and connected in an annular shape. The idler wheel 23 is configured to be able to move back and forth, and can adjust the tension of the crawler board 27 wound in an annular shape.

  Referring to FIG. 2, cab 5 includes a cubic frame 51, a windshield 53 fitted on the front side of frame 51, and a pair of left and right side glasses 55 fitted on both side surfaces of frame 51, respectively. It has. Above the front surface of the frame 51, a wiper device 61 is provided along the upper edge of the rectangular plate-shaped windshield 53.

  Referring to FIG. 3, wiper device 61 includes a wiper body 63 that swings so as to wipe off water droplets such as rainwater attached to the outer surface of windshield 53, and an electric motor 65 that swings wiper body 63 through a link. And a metal bracket 67 that supports the wiper main body 63 and the electric motor 65 and is fixed above the front surface of the frame 51 and along the upper edge of the windshield 53. The bracket 67 is fixed to an upper surface of the frame 1 and to a mounting surface extending laterally along an upper edge 53 of the windshield. A seal member made of an elastic member or the like may be provided between the bracket 67 and the mounting surface located on the upper edge of the frame 1 so as to ensure that the liquid does not leak. The eave portion 69 includes an upright portion 69a extending upward from an upper edge of the bracket 67, and an eave body portion 69b extending forward from the upper edge of the upright portion 69a.

  The erected portion 69a is erected higher than the front edge of the skylight 57 of the driver's cab 5 to prevent raindrops attached to the skylight 57 from dripping toward the windshield 53. The eaves main body 69b protrudes forward from the front edge of the cover 73 that covers the electric motor 65. The leading edge of the eave body 69b may be located behind the front edge of the cover 73. However, by setting the forward position equal to or greater than the front edge of the cover 73, In addition, the wiper device 61 is easily protected from impacts such as falling rocks from above.

  Referring to FIG. 4, an eave portion 69 extending forward is integrally provided at an upper edge of bracket 67. The eaves 69 are formed integrally with the bracket 67 and are made of the same metal as the bracket 67. In the present invention, "the bracket is integrally provided with the eaves" is not limited to the case where the bracket and the eaves are integrally formed as in the present embodiment. May be welded or bolted.

  Referring to FIG. 5, a pair of left and right lighting devices 71 is provided on bracket 67 so as to sandwich a base end serving as a swing fulcrum of wiper main body 63 from right and left. The work machine 7 is located on the left side of FIG. 5, and the lighting device 71 and the eaves 69 on the work machine 7 are separated from the work machine 7 so that the bucket 10 of the work machine 7 does not interfere with the lighting device 71. They are arranged so as to be biased toward the far side (shifted to the right in FIG. 5). Thereby, the lighting device 71 and the eaves 69 can be located outside the interference area 100 where there is a possibility of interfering with the bucket 10 of the working machine 7, and the interference between the working machine 7 and the lighting device 71 can be prevented. it can.

  Referring to the exploded view of FIG. 3, the wiper device 61 includes a cover 73 that covers an electric motor 65 and a base end portion of a swing shaft of the wiper main body 63 and has an opening that exposes the illumination device 71. The appearance of the wiper device 61 is improved, and the electric motor 65 is protected. 2, 4 and 5, the cover 73 is omitted for convenience of explanation.

  According to the construction machine wiper device 61 of the present embodiment, since the eaves 69 are provided integrally with the upper edge of the bracket 67, the wiper device 61 with the eaves 69 can be configured compactly. Therefore, even with the wiper device 61 provided above the windshield 53 of the cab 5 of the construction machine 1 composed of a hydraulic shovel, the upper sight is prevented or suppressed from being restricted, and The eaves 69 can prevent rainwater on the ceiling from flowing into the windshield 53.

  Since the eaves 69 are provided integrally with the bracket 67, the eaves 69 are also made of the same metal material as the bracket 67. Therefore, the electric motor 65 of the wiper device 61 and the oscillating end of the wiper body 63 can be protected against falling objects from above by the relatively strong eaves 69.

  Further, since the eave portion 69 includes the upright portion 69 a extending upward from the upper edge of the bracket 67, the rainwater collected on the ceiling of the driver's cab 5 flows into the windshield 53 so that the upright portion 69 a Thus, a good view of the cab 5 can be maintained.

  In the present embodiment, the hydraulic shovel applied to the endless track 2 of the excavator has been described. However, the seal structure of the present invention is not limited to this. For example, it can be used for other construction machines such as bulldozers, agricultural machines such as tractors and combines, snowmobiles, tanks, and the like. Even with this, even with the wiper device 61 provided above the windshield 53 of the cab 5 of the construction machine 1, the upper view is prevented or suppressed from being restricted, and the ceiling of the cab 5 is protected. The effect of the present invention that rainwater can be prevented from flowing into the windshield 53 by the eaves 69 can be obtained.

DESCRIPTION OF SYMBOLS 1 Construction machine 2 Endless track 3 Traveling body 4 Revolving superstructure 5 Operator's cab 6 Machine room 7 Work implement 8 Boom 9 Arm 10 Bucket 11a Rod 12 Hydraulic cylinder 12a Rod 13 Bucket hydraulic cylinder 13a Rod 14 Link 21 Starting wheel 21a Sprocket 23 Idling wheel 25 Roller wheel 27 Footwear plate 51 Frame 53 Front glass 55 Side glass 57 Skylight 61 Wiper device 63 Wiper body 65 Electric motor 67 Bracket 69 Eave portion 69a Standing portion 69b Eave body portion 71 Lighting device 73 Cover 100 Interference area

Claims (2)

A bracket fixed to a mounting surface that is an upper edge of a frame of a cab of the construction machine and extends laterally along an upper edge of a windshield;
A wiper body swingably attached to the bracket and capable of wiping water droplets attached to an outer surface of the windshield of the cab,
With
An eave portion extending toward the front of the cab is integrally provided on an upper edge of the bracket,
The wiper device for a construction machine, wherein the eave portion includes an upright portion extending upward from an upper edge of the bracket, and an eave body portion extending forward from an upper edge of the upright portion. . The wiper device for a construction machine according to claim 1,
The bracket is provided with a pair of left and right lighting devices,
The construction machine is a hydraulic shovel,
The hydraulic shovel is provided with a working machine beside the cab,
For a construction machine, the lighting device and the eave portion on the working machine side of the pair of lighting devices are arranged so as to be shifted in a direction away from the working machine so as to avoid interference with the working machine. Wiper device.