JP5451668B2 - Work machine - Google Patents

Description

  The present invention relates to a work machine such as a wheel loader.

  A work machine such as a wheel loader may be provided with a camera for an operator in the cab to confirm the rear. This camera is attached to the rear part of the work machine with the camera covered with a cover for reasons such as waterproofing to prevent damage caused by collisions with flying objects such as rocks and fixed objects such as trees and structures. (See Patent Document 1).

JP 2006-336361 A

  However, in the thing described in the above-mentioned patent document, since the camera and the cover that covers the camera are attached later, the number of components increases, and additional processing for attachment is required, which increases costs. Moreover, since it is necessary to photograph the counterweight, which is the rear end of the work machine, with a camera, the camera and the cover that covers the camera project to the rear of the work machine, which makes the appearance worse.

(1) A work machine according to a first aspect of the present invention includes a radiator disposed in a building cover of the work machine, and an air cooling fan for blowing air to the radiator, and is provided with an air cooling disposed in the building cover of the work machine. It has a fan unit and a ventilation part through which intake or exhaust air from the air cooling fan circulates outside the building cover, and can be opened and closed to cover or open the rear opening of the building cover, above the counterweight of the work machine And a camera attached to the inside of the grill to take a picture of the rear of the work machine from the top of the counterweight. The grill is a portion formed to be recessed toward the inside of the grill. A recess is provided to prevent interference with a range where the rear end of the counterweight of the camera is photographed.
(2) According to a second aspect of the present invention, in the work machine according to the first aspect, the concave portion is provided from the vicinity of the camera mounting position to the vicinity of the upper end of the counterweight.
(3) According to a third aspect of the present invention, in the work machine according to the second aspect, the grill has a vertical beam extending in a vertical direction with a concave portion, and the vertical beam protrudes toward the inside of the grill and extends in the vertical direction. And a groove provided on the outside of the grill corresponding to the position where the rib is provided.
(4) According to a fourth aspect of the present invention, in the work machine according to any one of the first to third aspects, the grill has a hook that prevents the sun from being reflected by the camera.

  According to the present invention, a camera for photographing the rear of the work machine from the upper part of the counterweight is attached to the inside of the grill and is formed to be recessed toward the inside of the grill, and at least the counterweight of the camera is The grill is provided with a recess for preventing interference with a range where the rear end is photographed. As a result, the camera can be protected from rainwater, etc., and the necessary shooting range with the camera can be secured, and since the camera does not protrude outside the work machine, the appearance is improved and the rear view is not deteriorated. Damage due to contact with obstacles can also be prevented.

It is a side view of the wheel loader which is an example of a working machine. It is a top view of a wheel loader. It is a front view of a wheel loader. It is a rear view of a wheel loader. It is the figure which looked at the rear body from the left side. It is a perspective view of a rear body. It is a side view which shows the grille of an open state. It is the figure which looked at the grill from back. It is a figure which shows the cross section of a grill. It is the exploded view of a grill and a camera which looked at the grill from the inside. It is a figure which shows the imaging | photography range of a camera. It is a perspective view of the rear part vicinity of a wheel loader. It is a top view of the rear part vicinity of a wheel loader. It is a perspective view of the rear part vicinity of a wheel loader, and is a figure explaining the relationship between the drawbar pin inserted and extracted and a grill. It is a figure which shows the cross section of a longitudinal beam and a protrusion.

  With reference to FIGS. 1-15, one Embodiment of the working machine by this invention is described. FIG. 1 is a side view of a wheel loader that is an example of a work machine according to the present embodiment, and FIG. 2 is a plan view of the wheel loader 100. FIG. 3 is a front view of the wheel loader 100, and FIG. 4 is a rear view of the wheel loader 100. FIG. 5 is a view of the rear vehicle body 120 as viewed from the left side, and shows a state in which the building cover 130 and the like on the left side are removed. FIG. 6 is a perspective view of the rear vehicle body 120. In FIG. 5, the description of the inner structure of the building cover 130 that is not directly related to the present invention is omitted.

  The wheel loader 100 includes a front vehicle body 110 having an arm 111, a bucket 112, a tire 113, and the like, and a rear vehicle body 120 having an operation room 121, a machine room (engine room) 122, a cooler room 126, a tire 123, and the like. Is done. The engine room 122 is covered with a building cover 130 and an engine hood 140. The engine hood 140 is provided with an intake pipe 145 for taking in air necessary for driving the engine (not shown) from outside and a tail pipe 171 for exhausting exhaust gas. The cooler chamber 126 is provided behind the engine chamber 122 and is partitioned from the engine chamber 122 by a partition wall (not shown). The side surface of the cooler chamber 126 is covered with a part of the building cover 130 and the cooler building cover 132, and the upper surface of the cooler chamber 126 is covered with the cooler building cover 132.

  A counterweight 124 is attached to the rear of the rear vehicle body 120. The counterweight 124 is provided with a drawbar pin 124a for traction or the like so that it can be inserted and removed (FIGS. 2 and 4). A hydraulic oil tank 125 is provided in front of the engine chamber 122.

  The arm 111 is turned up and down (up and down) by driving the arm cylinder 117, and the bucket 112 is turned up and down (dumped or clouded) by driving the bucket cylinder 115. The front vehicle body 110 and the rear vehicle body 120 are pivotally connected to each other by a center pin 101, and the front vehicle body 110 is refracted left and right with respect to the rear vehicle body 120 by expansion and contraction of the steering cylinder 116. For convenience of explanation, the present embodiment defines the front-rear and left-right directions and the up-down direction as described in the respective drawings.

  In the cooler chamber 126, a radiator frame (not shown) and an air cooling fan unit 294 are disposed. A radiator 291 for cooling engine coolant, a transmission oil cooler 292, and an intercooler 293 for cooling air pressurized by the engine supercharger are attached to the radiator frame. Depending on the model of the wheel loader 100, various coolers such as an oil cooler for cooling the hydraulic oil and a condenser of an air conditioner for air conditioning in the cab 121 are attached to the radiator frame. The radiator frame is fixed to the rear vehicle body 120. The air cooling fan unit 294 includes an air cooling fan 294a driven by a fan motor and a fan shroud, and is disposed behind the radiator frame (radiator 291).

--- About the grill 200 ---
The cooler building cover 132 is opened at the rear opening 133 (see FIG. 7). The opening 133 corresponds to an opening surface that is substantially orthogonal to the front-rear direction of the wheel loader 100 at the rear of the rear vehicle body 120, and is covered with a grill 200 that can be opened and closed as shown in FIG. The grill 200 is a cover provided with a ventilation portion 201 that is a plurality of openings so that intake or exhaust air from the air cooling fan 294a circulates to the outside, and is, for example, a resin molded product. The grill 200 is pivotally supported at the upper part of the cooler building cover 132 by a rotating shaft whose upper part extends in the left-right direction. The grill 200 is configured to be fixable by a grill fixing device (not shown) so that the grill 200 can be fixed in a state of covering the opening 133. When the opening 133 is exposed, the grill 200 can be unlocked by operating a release lever (not shown) of the grill fixing device.

  8 is a view of the grill 200 as viewed from the rear, FIG. 9A is a cross-sectional view taken along the line IX-IX of FIG. 8, and FIG. 9B is an enlarged view of the upper part of FIG. . A camera 280 for confirming the rear of the wheel loader 100 is attached near the center in the left-right direction on the inner (front) upper portion of the grill 200. FIG. 10 is an exploded view of the grill 200 and the camera 280 when the grill 200 is viewed from the inside. A camera mounting boss 211 for mounting the camera 280 is provided inside the grill 200. In the camera mounting boss 211, a metal insert boss (not shown) for screwing a bolt is embedded. The camera 280 is attached to the bracket 281. The camera 280 is fixed to the grill 200 by fixing the bracket 281 to the camera mounting boss 211 with a bolt or the like.

  The grill 200 is provided with a photographing opening 202 so that the camera 280 attached to the inside of the grill 200 can photograph the rear of the wheel loader 100. The camera 280 is disposed obliquely downward so as to photograph the rear end of the wheel loader 100 and the rear of the wheel loader 100 through the opening 202. The state behind the wheel loader 100 photographed by the camera 280 is displayed on a monitor (not shown) provided in the cab 121. The operator can check the presence or absence of an obstacle behind the wheel loader 100 by visually recognizing the image displayed on the monitor. In FIG. 9B, 203 is a bag for the camera 280. The bag 203 will be described in detail later.

  FIG. 11 is a diagram illustrating a shooting range 285 of the camera 280. FIG. 11A is a diagram illustrating the imaging range 285 when viewed from the top surface of the wheel loader 100, and FIG. 11B is a diagram illustrating the imaging range 285 when viewed from the left side surface of the wheel loader 100. . As shown in FIGS. 11A and 11B, the photographing range 285 of the camera 280 is set so that the rear end and the vicinity of the left and right ends of the counterweight 124 can be photographed.

--- About recessed part 220 ----
12 is a perspective view of the vicinity of the rear portion of the wheel loader 100, and FIG. 13 is a plan view of the vicinity of the rear portion of the wheel loader 100. As shown in FIGS. 12 and 13, the grill 200 is forward (inside the grill 200) when the grill 200 is viewed from the rear so as not to interfere with the photographing range near the rear end and the left and right ends of the counterweight 124. A concave portion 220 that is a portion formed so as to be recessed is provided. The recessed portion 220 is a hatched portion in FIG. 12, and is provided from the position where the camera 280 is disposed to the lower end of the grill 200 (ie, near the upper end of the counterweight 124). For example, as shown in FIG. 13, the grill 200 has a shape that draws an arc so as to protrude rearward as a whole when viewed from above. It has a shape that draws an arc so as to protrude forward when viewed. That is, the concave portion 220 is a portion in which the vicinity of the center in the left-right direction is recessed in the opposite direction (front) of the grill 200 formed in an arch shape so as to project rearward. Thus, the above-described photographing range 285 can be secured by denting the grill 200 forward.

  For example, as shown in FIGS. 12 and 13, even if a recess 220 is provided in the grill 200 up to the lower end of the grill 200 and the opening 133 is closed by the grill 200, the grill 200 and the drawbar pin 124 a do not overlap in plan view. It is in a positional relationship. That is, as shown in FIG. 14, the draw bar pin 124 a can be pulled out above the counterweight 124 while the opening 133 is closed by the grill 200. In FIG. 14, 124 b is a hole provided in the counterweight 124 for inserting the draw bar pin 124 a. Although it is necessary to hang a wire rope on the drawbar pin 124a for towing or the like, even in such a case, the drawbar pin 124a can be inserted into and removed from the counterweight 124 without opening the grill 200, so that workability is good. It is.

--- About 庇 203 ---
As described above, since it is necessary to photograph the vicinity of the left and right ends of the counterweight 124 directly below the grill 200 with the camera 280 attached to the upper part of the grill 200, the angle of view of the camera 280 is a wide angle. Therefore, the sun may be reflected on the camera 280 as it is. If the sun is reflected on the camera 280, halation may occur, and there is a risk that the camera 280 may interfere with the rearward confirmation of the wheel loader 100. Therefore, in the present embodiment, as shown in FIG. 9B, the upper peripheral portion (庇 203) of the opening 202 is formed so as to protrude rearward, and is used as a ridge of the camera 280, above the angle of view for photographing. Is limiting. That is, the shooting range of the camera 280 is limited by the rod 203. Accordingly, it is possible to improve the image quality for confirming the rear of the wheel loader 100 by preventing the reflection of the sun while securing a necessary shooting range using the wide-angle camera 280.

--- About the protrusion 231 of the grill 200 ---
A member extending in the vertical direction near the center of the grill 200 in the left-right direction is referred to as a vertical rail 230. Since the vertical rail 230 is provided so as to connect the concave portions 220 to each other, the clearance with the components and the like in the cooler chamber 126 is narrower than a conventional grill not provided with the concave portions 220. Therefore, it is difficult to secure the thickness of the vertical beam 230 in the front-rear direction, and the strength of the vertical beam 230 may be insufficient. Therefore, in this embodiment, the front surface of the vertical beam 230 (that is, the grill 200) A protrusion 231 that protrudes toward the cooler chamber 126 side and extends in the vertical direction is provided on the cooler chamber 126 side (see FIG. 9A). The protrusion 231 is for reinforcing the vertical rail 230 of the grill 200. It should be noted that no protrusion 231 is provided on the uppermost part and the lowermost part of the vertical rail 230.

  FIG. 15 schematically shows the XV-XV cross section of FIG. 9A, and shows the cross section of the longitudinal beam 230 and the protrusion 231. As described above, since the grill 200 is a molded product of resin, by providing the ridge 231, as shown in FIG. 15A, the vertical direction opposite to the inside of the vertical rail 230 provided with the ridge 231 is provided. There is a possibility that sink marks (dents) as indicated by reference numeral 230a may occur on the outside of the crosspiece 230 at positions corresponding to the positions where the protrusions 231 are provided. Therefore, there is a possibility of affecting the appearance. Therefore, in the present embodiment, a groove 232 extending in the vertical direction as shown in FIG. 15B is provided in a portion where the sink 230a is likely to occur so that the above-described sink does not stand out. .

The wheel loader 100 of the present embodiment described above has the following operational effects.
(1) A camera 280 for confirming the rear of the wheel loader 100 is attached to the inside of the upper portion of the grill 200. In order to secure the photographing range of the camera 280, the grill 200 is provided with a recess 220. As a result, the operator can easily recognize the state behind the wheel loader 100 photographed by the camera 280, and also prevents the camera 280 from malfunctioning due to the entry of rainwater, etc., and prevents the camera 280 from deteriorating the image quality of the photographed image. it can. Further, a camera mounting boss 211 for mounting the camera 280 is provided inside the grill 200, and the camera 280 is mounted on the camera mounting boss 211. Thereby, the increase in the component for attaching the camera 280 can be suppressed, and the increase in cost can be suppressed.

  For example, when the camera 280 is attached to the upper end of the outside of the grill 200 or the upper surface of the cooler building cover 132 as in a conventional work machine, the camera 280 is attached to the upper end of the outer side of the grill 200 or the upper surface of the cooler building cover 132. Protrudes and affects the rear view from the cab 121. Further, since the camera 280 protrudes to the outside, it may be damaged due to contact with flying objects or obstacles. However, in the present embodiment, since the camera 280 is attached to the inside of the grill 200, the rear view from the cab 121 is not adversely affected, and there is a risk of damage due to contact with flying objects or obstacles. Nor. Further, since the camera 280 does not protrude from the upper outer end of the grill 200 or the upper surface of the cooler building cover 132, it looks good and does not adversely affect the design of the wheel loader 100.

(2) The recess 220 is provided from the position where the camera 280 is disposed to the vicinity of the upper end of the counterweight 124 (the lower end of the grill 200), and the grill 200 and the drawbar pin 124a It was configured to be in a positional relationship that does not overlap. As a result, the drawbar pin 124a can be inserted / removed while the opening 133 is closed by the grill 200, so that workability when the wire rope is hung on the drawbar pin 124a for traction or the like is improved.

(3) With respect to the grill 200 having a shape that draws an arc so as to project backward as a whole when viewed from above, the arc is projected so as to project forward when viewed from above. A recess 220 having a shape as drawn is provided. Thereby, not only a functional surface but the design of the external appearance of the grill 200 becomes favorable.

(4) The protrusions 231 that protrude forward and extend in the vertical direction are provided inside the vertical rail 230. And the groove | channel 232 extended in an up-down direction was provided in the outer side of the vertical bar 230. FIG. Thereby, the strength of the grill 200, which is a resin molded product, can be ensured, and the sink caused by the provision of the protrusion 231 can be made inconspicuous.

(5) The upper peripheral edge portion (庇 203) of the opening 202 is used as the heel of the camera 280, and the upper part of the angle of view for photographing is limited. Accordingly, it is possible to improve the image quality for confirming the rear of the wheel loader 100 by preventing the reflection of the sun while securing a necessary shooting range using the wide-angle camera 280.

---- Modified example ---
(1) In the above description, the camera 280 is provided at the uppermost part inside the grill 200, but the present invention is not limited to this. You may make it attach the camera 280 below the position mentioned above, after ensuring a required imaging | photography range.

(2) In the above description, the camera 280 is provided near the center in the left-right direction inside the grill 200, but the present invention is not limited to this. The camera 280 may be attached at a position offset in the left-right direction from the above-described position after securing a necessary shooting range.
(3) You may combine each embodiment and modification which were mentioned above, respectively.

  The present invention is not limited to the embodiment described above, and includes a radiator disposed in the building cover of the work machine, and an air cooling fan for blowing air to the radiator, It has an air cooling fan unit arranged in the air and a ventilation part through which intake or exhaust air from the air cooling fan circulates outside the building cover, and can be opened and closed to cover or open the opening at the rear of the building cover. A grill provided above the counterweight of the machine, and a camera mounted on the inside of the grill for photographing the rear of the work machine from the top of the counterweight, and the grill is recessed toward the inside of the grill A recess formed to prevent interference with a range where at least the rear end of the counterweight is photographed. It is intended to include working machine various structures and.

DESCRIPTION OF SYMBOLS 100 Wheel loader 120 Rear vehicle body 122 Machine room (engine room) 124 Counter weight 124a Drawbar pin 126 Cooler room 130 Building cover 132 Cooler building cover 200 Grill 201 Ventilation part 202 Opening 203 庇 211 Camera mounting boss 220 Recess 230 Vertical beam 231 Projection Article 232 Groove 280 Camera 285 Shooting range

Claims (4)

A radiator disposed in the building cover of the work machine;
Including an air cooling fan for blowing air to the radiator, and an air cooling fan unit disposed in a building cover of a work machine;
The air cooling fan has a ventilation part through which the intake or exhaust air circulates to the outside of the building cover, and can be opened and closed so as to cover or open the rear opening of the building cover, above the counterweight of the work machine A grill provided,
A camera attached to the inside of the grill for photographing the back of the work machine from the upper part of the counterweight;
The grill is provided with a concave portion that is formed to be recessed toward the inside of the grill and that prevents interference with a range in which at least a rear end portion of the counterweight of the camera is photographed. A working machine characterized by that. The work machine according to claim 1,
The working machine characterized in that the recess is provided from the vicinity of the mounting position of the camera to the vicinity of the upper end of the counterweight. The work machine according to claim 2,
The grill has a vertical rail extending in the vertical direction at the concave portion,
The vertical rail protrudes toward the inside of the grill and extends in the up-down direction, and a groove provided on the outside of the grill corresponding to a position where the protrusion is provided. A work machine comprising: In the work machine according to any one of claims 1 to 3,
The work machine according to claim 1, wherein the grill has a ridge that prevents reflection of the sun from the camera.

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