Work Machine

Abstract

To easily fix a detection device such a position that an area in front of an upper revolving body can be overlooked without changing a frame member of a cab.SOLUTION: The present invention comprises a lower traveling body 2, an upper revolving body 3 mounted on the lower traveling body, a cab 10 mounted on the upper revolving body, an entrance 17 provided on one lateral side of the cab, a display device 40 provided on the front side of a lateral face of the cab facing the entrance on the other side in the left-right direction, and a detection device 50 for detecting information on an area in front of the upper revolving body. The detection device is fixed to the display device.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a work machine. [Background technology]

[0002] In recent years, hydraulic excavators and other work machines have become increasingly computerized and multifunctional, enabling advanced control. In addition, such work machines are increasingly being equipped with detection devices such as cameras and sensors that support the operation of the operator.

[0003] For example, the excavator described in Patent Document 1 is equipped with a stereo camera for capturing an image of an imaging range in front of the vehicle body. This stereo camera is disposed inside the cab along the upper edge of the front window.

[0004] The hydraulic excavator described in Patent Document 2 is equipped with an imaging device for capturing images of a working machine. In this hydraulic excavator, the working machine is supported on a rotating body adjacent to the right side surface of the cab, and the imaging device is disposed in the cab near the left front pillar at a position away from the working machine. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6553201 [Patent Document 2] JP 2019-203291 A Summary of the Invention [Problem to be solved by the invention]

[0006] When installing a detection device on the upper edge of the windshield or near a pillar as in Patent Documents 1 and 2, it is necessary to fix the device via a bracket having a certain strength. However, since the pillar and the top surface are frame members of the cab, there is a problem that it is not easy to change the design or attach a bracket later.

[0007] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to easily fix a detection device to a position that overlooks the front of the upper rotating body without making any changes to the frame members of the cab. [Means for solving the problem]

[0008] In order to achieve the above object, in the present invention, a detection device is fixed to a display device provided at the front side inside a cab.

[0009] Specifically, in the first invention, A lower running body; An upper rotating body mounted on the lower traveling body; A cab mounted on the upper rotating body; An entrance / exit provided on one side of the cab in the left / right direction; A display device provided on a front side of a side surface on the other left-right direction side of the cab facing the boarding / alighting entrance; A detection device that detects information in front of the upper rotating body, The detection device is fixed to the display device.

[0010] According to this configuration, since the detection device is fixed to the display device, it can be easily installed in the cab without modifying the frame member of the cab. By fixing the detection device to the display device, it is possible to overlook the front of the upper rotating body, and the detection device can fully perform its function. In addition, the detection device can be easily retrofitted to an existing work machine.

[0011] The second invention is the first invention, The other side surface of the cab in the left-right direction has a panel extending upward from a lower portion on the front side, The display device is provided on the upper portion of the panel.

[0012] With this configuration, the detection device is fixed to the display device provided at the upper front part of the panel, making it easier to install inside the cab and enabling a view of the front of the upper rotating body, allowing the device to fully function.

[0013] The third invention relates to the second invention, The detection device is fixed at a position protruding from the side of the display device toward the center of the cab in the left-right direction.

[0014] According to this configuration, since the detection device is located away from the pillar in front of the cab, the frame members of the work machine, such as the pillar, do not enter the detection range of the detection device, and detection accuracy can be ensured. Also, the detection device can detect a range close to the field of vision of the operator.

[0015] The fourth invention relates to the second invention, A driver's seat is provided inside the cab, The detection device is fixed so as to overlap within a dimension of the display device as viewed from an operator seated in the driver's seat.

[0016] According to this configuration, the detection device overlaps with the display device as viewed from the operator and fits within the same dimensions, so the detection device does not obstruct the operator's field of vision and is capable of detecting a range close to the operator's field of vision.

[0017] The fifth invention is the third or fourth invention, the display device has a display screen and a display screen mounting bracket for supporting the display screen, and is fixed to the panel via the display screen mounting bracket; The detector is fixed to a detector fixing portion extending from the display screen mounting bracket.

[0018] With this configuration, the display screen mounting bracket that supports the display device has high mounting strength, and the detection device is fixed to the detection device fixing part that extends from the display screen mounting bracket, so it is easy to ensure the mounting strength of the detection device. In addition, the detection device fixing part can be easily attached to the display screen mounting bracket later.

[0019] The sixth invention is any one of the first to fifth inventions, A front window is provided which is movable through the inside of the cab between a position where the front window is closed and a position where the front window is accommodated below the top surface of the cab and where the front window is opened, The detection device is fixed inside the movement trajectory of the front window.

[0020] According to this configuration, since the detection device does not interfere with the front window, it is possible to maintain the detection accuracy of the detection device even in a work machine having a movable front window. Effect of the Invention

[0021] According to the working machine of the present invention, the detection device can be easily fixed to a position that overlooks the front of the working machine, without making any changes to the frame member of the cab. [Brief description of the drawings]

[0022] [Figure 1] 1 is a schematic side view showing a work machine according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic plan view showing an upper rotating body, with the top surface of the cab omitted. [Diagram 3] This is a perspective view of the cab, with only the main parts inside the cab being shown. [Figure 4] 1 is a schematic side view showing the movement of the front window and the position of a detection device, with the boarding and alighting door omitted. [Diagram 5] FIG 2 is a perspective view showing a main part of the cab, with the front window omitted. [Figure 6] FIG. 2 is a front view showing a display device and a detection device. [Figure 7] FIG. 2 is a plan view showing the display screen mounting bracket. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. However, the following description is merely illustrative in nature and does not limit the present invention, its application, or its uses.

[0024] For ease of explanation, in some drawings, arrows are used to indicate the traveling direction of the work machine as the forward / rearward direction, the left / right direction as seen by an operator riding on the work machine as the left / right direction, and the up / down direction of the work machine as the up / down direction. Unless otherwise specified, the explanation will be given according to the directions indicated by these arrows.

[0025] As shown in Fig. 1, a work machine according to an embodiment of the present invention is, for example, a hydraulic excavator 1. This hydraulic excavator 1 is composed of a lower traveling body 2 having a pair of crawlers 2a on the left and right, and an upper rotating body 3 mounted on the lower traveling body 2 so as to be rotatable via a swing bearing. An attachment 4, a cab 10, a machine room 6, a counterweight 7, etc. are mounted on the upper rotating body 3.

[0026] The attachment 4 is composed of a bucket 4a, an arm 4b, a boom 4c, etc. The bucket 4a, the arm 4b, and the boom 4c of the attachment 4 are rotated by driving and controlling a hydraulic cylinder, and the attachment 4 can perform various work operations such as excavation. When the upper rotating body 3 is viewed from above, as shown in FIG. 2, the boom 4c is pivotally supported in front of the machine room 6 at approximately the center in the left-right direction of the upper rotating body 3 so as to be freely raised and lowered, and extends forward of the hydraulic excavator 1.

[0027] A heavy counterweight 7 is disposed at the rear end of the upper rotating body 3 in order to ensure a front-to-rear balance with the attachment 4 performing work operations. A covered machinery room 6 is disposed in front of the counterweight 7, and houses drive devices such as an engine and a hydraulic pump inside. A fuel tank, hydraulic oil tank, etc. associated with the drive devices are also disposed in the machinery room 6.

[0028] The cab 10 is provided in front of the machine room 6, adjacent to the left side of the attachment 4. As shown in Figs. 2 and 3, the cab 10 is a box-shaped cab consisting of a top surface 11, a floor surface 12, a front surface 13, a rear surface 14, and left and right side surfaces 15, 16. Most of the front, rear, left and right surfaces of the cab 10 are formed with windows, and the cab has a structure with excellent visibility. The interior of the cab 10 is a space where the hydraulic excavator 1 is operated, such as performing work operations on the attachment 4, operating the crawler 2a to travel, and operating the upper rotating body 3 to rotate.

[0029] The operator can get into the cab 10 through an entrance 17 provided on one of the left and right side surfaces of the cab 10. In this embodiment, the right side surface 16 of the cab 10 is adjacent to the attachment 4, and the entrance 17 is provided on the left side surface 15.

[0030] The cab 10 has, as frame members, a pair of ceiling frames 11a, 11a extending in the fore-and-aft direction on both the left and right sides of the top surface 11, left and right front pillars 13a, 13a extending downward from the front end of the ceiling frame 11a, a door pillar 15a extending downward from approximately the center of the fore-and-aft of the left ceiling frame 11a, and left and right rear pillars 14a, 14a extending downward from the rear end of the ceiling frame.

[0031] A transparent front window is attached between the left and right front pillars 13a, 13a on the front face 13. The front window is composed of an upper front window 18 on the upper side and a lower front window 19 on the lower side. The upper front window 18 can be opened and closed.

[0032] As shown by the dotted line in Figure 4, the upper front window 18 is movable through the inside of the cab 10 between a position (closing position) 18a in which it closes the window opening formed in the front surface 13 of the cab 10, and a position (open position) 18b in which it is housed below the top surface 11 of the cab 10 and opens the window opening.

[0033] 4, the inner end X of the movement trajectory of the upper front window 18 forms an arc shape at the front upper part of the cab 10. Specifically, the movement trajectory of the upper front window 18 ranges from the inner end X of the arc shape connecting below the vertical center of the front surface 13 to behind the longitudinal center of the top surface 11, in a side view, to the closed position 18a and the open position 18b.

[0034] The left and right front pillars 13a, 13a are provided with rails for sliding the upper front window 18. The ceiling frames 11a, 11a are provided with rails for sliding the upper front window 18 in the front-rear direction.

[0035] Inside the cab 10, a driver's seat 20 where an operator sits is provided on the floor surface 12. A headrest 20a is provided at the top of the driver's seat 20. A console box 22 equipped with an operating lever 21 for operating the attachment 4 is provided on both the left and right sides of the driver's seat 20. A travel pedal 23 and a travel lever 24 are provided at the front lower side of the driver's seat 20.

[0036] A panel 30 is provided on the other left-right side 16 of the cab 10 facing the entrance 17, and extends upward from a lower portion on the front side of the side 16. Specifically, in this embodiment, an air conditioning unit, a ventilation duct, various wiring, etc. are disposed on the lower portion of the right side 16 of the cab 10 adjacent to the attachment 4. The panel 30 extends upward from the floor surface 12 so as to cover the air conditioning unit, etc., and is formed in an inclined shape from the vicinity of the driver's seat 20 to the front pillar 13a so as to gradually become higher from the rear side to the front side.

[0037] 5, a plurality of air conditioner air outlets 30a are provided on the panel 30. A right window 16a is provided at the upper part of the panel 30.

[0038] A display device 40 is provided on the upper part of the panel 30. Specifically, as shown in Fig. 4, the display device 40 is provided on the upper part of the panel 30, which is located higher than the seat portion of the driver's seat 20 and lower than the headrest 20a.

[0039] 6, the display device 40 has a display screen 41 and a display screen mounting bracket 42 that supports the display screen 41. The display device 40 is fixed to the panel 30 via the display screen mounting bracket 42. The exterior of the display screen 41 is made of, for example, a resin member, and the display screen mounting bracket 42 is made of, for example, a metal member.

[0040] On the display screen 41, various information showing the state of the hydraulic excavator 1, such as a cluster gauge, is displayed and can be operated by the operator. The display screen 41 is attached facing diagonally downward toward the headrest 20a so that the operator seated in the driver's seat 20 can easily view and operate it.

[0041] 7, the display screen mounting bracket 42 has a rectangular flat display screen fixing portion 42a that fits along the back surface (the surface on the front side in the front-rear direction) of the display screen 41. The display screen 41 is fixed to the display screen fixing portion 42a. A fixing piece 42b extends, bending rearward, from the left edge of the display screen fixing portion 42a. The fixing piece 42b is formed so as to fit along the side surface of the display screen 41.

[0042] The fixed part 42c extends from the right end of the display screen fixing part 42a, bending forward. The fixed part 42c has a front end extending downward, and three screw holes are provided at the front end at a distance in the vertical direction. Screws 42d are inserted into the screw holes to fix the fixed part 42c to the upper part of the panel 30. Since the display screen fixing part 42a is formed at a predetermined angle with respect to the fixed part 42c, the display screen 41 fixed to the display screen fixing part 42a faces diagonally downward toward the headrest 20a so that the operator seated in the driver's seat 20 can easily view and operate the display screen 41.

[0043] The detector 50 is fixed at a position protruding from the side of the display device 40 toward the center of the cab 10 in the left-right direction. Specifically, a detector fixing portion 43 extends from a fixing piece 42b provided on the left edge of the display screen mounting bracket 42 toward the center of the cab 10 in the left-right direction, and the detector 50 is fixed to an end of the detector fixing portion 43. As shown in FIG. 6, an end of the detector fixing portion 43 is bent backward to form a detector mounting piece 43a, and the detector 50 is fixed to the detector mounting piece 43a. The detector fixing portion 43 causes the detector 50 to protrude leftward from the display screen 41.

[0044] The detection device 50 is fixed inside the movement trajectory of the upper front window 18. Therefore, even if the upper front window 18 is opened or closed, the detection device 50 does not collide with the upper front window 18, and detection accuracy can be maintained.

[0045] The detection device 50 is installed facing forward so as to be able to detect information about the area in front of the upper rotating body 3. The detection device 50 is, for example, an imaging device such as a camera, or a sensor such as a lidar or a millimeter wave radar. In this embodiment, the detection device 50 is a camera capable of capturing an image of the area in front of the upper rotating body 3.

[0046] The display screen mounting bracket 42 that supports the display device 40 is made of a material with high mounting strength, such as metal. Therefore, with this configuration, the detection device fixing portion 43 is provided on the display screen mounting bracket 42, and the detection device 50 is fixed to the end of the detection device fixing portion 43, so that the mounting strength of the detection device 50 can be easily ensured. Since there is no need to change the frame member of the cab 10, the detection device 50 can be easily attached. In addition, the detection device 50 can be easily attached to an existing display device 40.

[0047] In addition, in this configuration, the detection device 50 can be positioned away from the right front pillar 13a, which prevents the front pillar 13a and other frame members from entering the detection range of the detection device 50 and ensures detection accuracy. In addition, the detection device 50 can detect a range close to the field of view of the operator seated in the driver's seat 20.

[0048] [Other embodiments] The working machine according to the present invention is not limited to the above-described embodiment, but includes various other configurations.

[0049] The detection device 50 may be fixed so as to overlap within the dimensions of the display device 40 as viewed by the operator seated in the driver's seat 20. Specifically, the detection device 50 may be arranged on the rear surface of the display screen 41 (the surface on the front side in the front-rear direction) so as to fit within the dimensions of the display screen 41, and may be fixed so as to be hidden by the display screen 41 and not visible to the operator seated in the driver's seat 20. By arranging the detection device 50 in this manner, the detection device 50 does not obstruct the operator's field of vision. Furthermore, the detection device 50 becomes able to detect a range close to the operator's field of vision.

[0050] Furthermore, the display device 40 only needs to be provided on the front side of the other side in the left-right direction opposite the boarding / alighting entrance 17, and it is not limited to being attached to the top of the panel 30, but may also be attached to the front pillar via a bracket, for example.

[0051] Furthermore, the work machine is not limited to a hydraulic excavator. [Explanation of symbols]

[0052] 1. Hydraulic excavator (working machine) 2 Undercarriage 3. Upper rotating body 10 Cab 17 Entrance gate 20 Driver's seat 30 Panel 40 Display device 41 Display screen 42 Display Screen Mounting Bracket 43 Detector fixing part 50 Detection Device

Claims

1. A lower running body; An upper rotating body mounted on the lower traveling body; A cab mounted on the upper rotating body; An entrance / exit provided on one side of the cab in the left / right direction; A panel provided on the other left-right side of the cab facing the boarding / alighting entrance and extending upward from a lower part on the front side; a display device having a display screen and a display screen mounting bracket for supporting the display screen, the display device being provided on an upper portion of the panel via the display screen mounting bracket; a detection device that is fixed to a detection device fixing portion extending from the display screen mounting bracket and is installed facing forward so as to be able to detect the front of the upper rotating body; The hydraulic excavator is characterized in that the display screen is fixed facing diagonally downward toward the headrest of the driver's seat so that it can be easily viewed and operated by an operator seated in the driver's seat.

2. 2. The hydraulic excavator according to claim 1, wherein the detection device is fixed to a position protruding from a side of the display device toward a central portion in the left-right direction of the cab.

3. A driver's seat is provided inside the cab, 2. The hydraulic excavator according to claim 1, wherein the detection device is fixed so as to overlap within a dimension of the display device as viewed from an operator seated in the driver's seat.

4. A front window is provided which is movable through the inside of the cab between a position where the front window is closed and a position where the front window is accommodated below the top surface of the cab and where the front window is opened, The hydraulic excavator according to claim 1 , wherein the detection device is fixed to an inner side than a moving trajectory of the front window.

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