Work machine

Abstract

To provide a work machine improving operability of a display device of the work machine without interfering operability of the work machine using an operation lever.SOLUTION: A work machine is provided with: a first lever to operate the work machine placed next to one side of an operator seat; a second lever to operate a soil discharge device placed at a side of one side of the first lever; a display device placed in front of the operator seat, the first lever, and the second lever; and a jog dial to operate the display device. The jog dial is located between the first lever and the second lever at a position viewing the operator seat form a rear surface.SELECTED DRAWING: Figure 3

Description

[Technical field]

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

[0002] As a related art, a work machine is known in which a jog dial is installed near the bottom of an operating lever installed on the side of the seat to operate the display device of the work machine, and is arranged so as to overlap with a dozer lever arranged on the outside of the operating lever toward the front of the bottom of the operating lever when viewed from behind (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2021-185306 A Summary of the Invention [Problem to be solved by the invention]

[0004] When viewed from a desired position in the driver's seat, the jog dial is positioned so that it overlaps the front of the dozer lever. Therefore, if the operator uses the jog dial to operate the display device and then attempts to operate the dozer lever, the operator must pull his or her arm closer to grasp the dozer lever so that it does not come into contact with the dozer lever, and care must be taken to avoid malfunction.

[0005] In one aspect, there is a work machine in which, after the key is turned on, a PIN code is displayed on a display device using a keypad and entered to start the engine. In such a work machine, there is a demand for a smooth transition to a series of operations in which, after entering the PIN code on the keypad, the display device is operated using a jog dial, the work machine is set, and the operation levers including the dozer lever are operated.

[0006] The present invention has been made in consideration of the problems with the conventional technology described above, and an object of the present invention is to provide a work machine that improves the operability of the work machine's display device without interfering with the operability of the work machine using an operating lever. [Means for solving the problem]

[0007] A work machine according to one embodiment of the present invention is a work machine comprising an upper body supported for free rotation on a lower running body equipped with an earth removal device, and a work implement supported on the upper body, and is equipped with a first lever for operating the work implement, arranged next to one side of a driver's seat of the work machine, a second lever for operating the earth removal device, arranged to the side of one side of the first lever, a display device arranged in front of the driver's seat, the first lever and the second lever, and a jog dial for operating the display device, with the jog dial being located between the first lever and the second lever in a position facing the driver's seat from behind. Effect of the Invention

[0008] According to the present invention, a work machine can be provided that improves the operability of the work machine's display device without interfering with the operability of the work machine using an operating lever. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a left side view of a hydraulic excavator according to a first embodiment of the present invention. [Diagram 2] FIG. 1 is a plan view of a driver's seat of a hydraulic excavator according to a first embodiment of the present invention. [Diagram 3] 1 is a schematic diagram showing an example of a driver's seat of a hydraulic excavator according to a first embodiment of the present invention, as viewed from the back of the seat. [Figure 4] FIG. 2 is a plan view of a jog dial of the hydraulic excavator according to the first embodiment of the present invention. [Diagram 5] FIG. 1 is a plan view of a keypad of a hydraulic excavator according to a first embodiment of the present invention. [Figure 6] FIG. 11 is a plan view of a driver's seat of a hydraulic excavator according to a second embodiment of the present invention. [Figure 7] 11 is a schematic diagram showing an example of a driver's seat of a hydraulic excavator according to a second embodiment of the present invention, as viewed from the back of the seat. FIG. [Figure 8] FIG. 11 is a plan view of a driver's seat of a hydraulic excavator according to a modified example of the second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] A first embodiment of the present invention will be described in detail below with reference to the accompanying drawings, taking a hydraulic excavator 100 as a representative example of a work machine according to the present invention. Note that the direction in which the work machine 400 is attached to the upper rotating body 300 is the front, and the opposite direction is the rear.

[0011] As shown in FIG. 1, the hydraulic excavator 100 comprises a self-propelled lower traveling body 200, an upper rotating body 300 rotatably supported on the lower traveling body 200, and a work machine 400 supported in front of the upper rotating body 300 so as to be freely rotatable up and down.

[0012] The lower traveling body 200 has a center frame (not shown) and side frames 210 that are symmetrically paired with the center frame and extend in the front-rear direction, and drive wheels 212 driven by a traveling motor 211 are installed at the rear ends of the left and right side frames 210, and a plurality of idler wheels 213 are arranged facing forward, and tracks 214 are wound around the drive wheels 212 and the idler wheels 213. Furthermore, a soil removal device 215 is supported at the front of the center frame, and is movable up and down by the extension and contraction of a blade cylinder 216 that connects the soil removal device 215 and the center frame.

[0013] The upper rotating body 300 is arranged from the front to the rear of the machine on one side of the machine and is composed of a cabin 320 covering the driver's seat 310, an engine room 330 formed from the other side of the machine to the rear of the machine, and a swing post 340 supported on a protruding part at the front end of the machine so as to be freely rotatable left and right, and supporting a work machine 400 so as to be freely rotatable up and down.

[0014] The work machine 400 comprises a boom 410 supported on a swing post 340 so as to be freely rotatable up and down, an arm 420 attached to the tip of the boom 410 so as to be rotatable up and down, a bucket 430 attached to the tip of the arm 420 via a quick hitch 421 so as to be rotatable and detachable, and a swing cylinder (not shown) that moves the swing post 340 is arranged on the right side of the frame of the upper rotating body 300.

[0015] The boom cylinder 440 is disposed in front of and below the boom 410, and is operable to be raised and lowered by extension and contraction of the boom cylinder 440.

[0016] The arm cylinder 450 is installed above the boom 410, and by extension and contraction of the arm cylinder 450, the arm 420 performs a dumping operation in which it rotates forward and a crowding operation in which it rotates backward.

[0017] The bucket cylinder 470 is disposed in front of (above) the arm 420 and is connected to the arm 420 and the bucket 430 via a bucket link 460. When the bucket cylinder 470 expands and contracts, the bucket 430 rotates forward for a dumping operation and rearward for a crowding operation.

[0018] The engine room 330 houses multiple pieces of equipment, such as an engine (not shown), a variable displacement pump (not shown) that is driven by the engine and pumps hydraulic oil to multiple actuators that move the hydraulic excavator 100, such as the boom cylinder 440 and the arm cylinder 450, and a control valve (not shown) that is a collection of directional control valves that control the corresponding actuators.

[0019] Fig. 2 is a plan view of driver's seat 310, and Fig. 3 is a schematic diagram of driver's seat 310 as viewed from the back of seat 312. On one side (right side) of floor material 311 is right side wall 311R having a window of cabin 320 above, on the other side (left side) of floor material 311 is boarding gate 311L configured to be freely opened and closed by a door, windshield 311F at the front end of floor material 311, and seat 312 at the rear of floor material 311.

[0020] A pair of left and right travel levers 313a1, 313a2 having pedals at their base ends are provided at the front of the floor material 311, facing the windshield 311F, and the left and right travel levers 313a1, 313a2 can be tilted forward and backward to travel the hydraulic excavator 100 forward and backward.

[0021] At the front of the floor material 311, there is provided a dashboard 314 which is formed so as to slope from the front to the rear downward along the right side wall 311R, and at the top of the dashboard 314, there is provided an LCD monitor 315, and a display unit 315a of the LCD monitor 315 and an operation button 315b for operating the LCD monitor 315 located below it are both arranged to face towards the seat 312.

[0022] A duct is formed inside dashboard 314 through which air discharged from the air conditioning unit flows, and below liquid crystal monitor 315, air conditioning outlet 314a from which conditioned air blows out is arranged facing the seat 312. In addition, in front of and below liquid crystal monitor 315, defroster outlet 314b from which conditioned air blows out is arranged facing boarding gate 311L.

[0023] On one side of seat 312, the right side, there is arranged a lever console 316a with an operating lever 313b1 standing at its front upper end, and on the other side of seat 312, the left side (boarding gate 311L side), there is arranged a lever console 316b with an operating lever 313b2 standing at its front upper end.

[0024] When the operating lever 313b1 is tilted forward, the boom 450 is lowered, and when the operating lever 313b1 is tilted backward, the boom 450 is raised. When the operating lever 313b2 is tilted forward, the arm 410 performs a dumping operation, and when the operating lever 313b2 is tilted backward, the arm 410 performs a crowding operation. In other words, the operating levers 313b1 and 313b2 operate the work machine 400.

[0025] The lever console 316b is extended from a position slightly forward of the seat 312 while inclining backward, and is provided at its tip with a cut-off lever 316b2 that rises forward and an armrest 316b1 behind the operating lever 313b2. When the cut-off lever 316b2 is pulled backward, the lever console 316b rotates backward, cutting off the pilot pressure that controls the control valve, and the operating levers 313b1 and 313b2 and the travel levers 313a1 and 313a2 become inoperable.

[0026] Lever console 316a is extended from a position slightly forward of seat 312 at an angle toward the rear, and then extends straight from its middle to the vicinity of the rear end of seat 312. An air conditioning operation switch 316a1 is located at the top of this portion.

[0027] Lever console 316a has an arm rest 316a2 disposed behind operating lever 313b1, and a key switch 316a3 for starting the engine is attached to the inclined portion below arm rest 316a2 and in front of air conditioner operating switch 316a1.

[0028] A console 317 is disposed on one side (right side) of the lever console 316a, and an operating lever 318 for operating the soil removal device 215 is provided between the console 317 and the right side wall 311R, and the grip of the operating lever 318 is inclined toward the seat 312 so as to be located above the console 317. In other words, the operating lever 318 is disposed on one side, i.e., the right side, of the operating lever 313b1, and the operating lever 318 is disposed to the right of the armrest 316a2 (next to one side).

[0029] The console 317 extends from near the front end of the lever console 316a to a position short of the rear end of the lever console 316a.

[0030] A jog dial 317a for operating the display device 315 is located at the front of the top surface of the console 317, and behind that are a keypad 317b, and behind that are a power switch 317c for activating the quick hitch 421 for replacing the bucket 430 with another attachment, and an operation switch 317d for operating the quick hitch 421. On the rear side, toward the rear end, are an accelerator 317e for setting the engine speed and a power socket 317f.

[0031] The top surface of the console 317 is formed so as to slope from one side (the right side) towards the seat 312, and the jog dial 317a, keypad 317b, and power socket 317f are positioned so as to slope downward so as to be easy for the operator sitting in the seat 312 to operate.

[0032] The jog dial 317a is disposed at a gentler incline than the accelerator 317e, and is disposed at a position that makes it easy to operate the display device 315a.

[0033] In addition, a jog dial 317a is disposed on the right front below the armrest 316a2, and an accelerator 317e is disposed on the right rear below the armrest 316a2 at a lower position than the jog dial 317a. By so doing, the jog dial 317a, which is used more frequently, is positioned so that the operator can easily use it while resting his / her elbow on the armrest 316a2, while the accelerator 317e, which is used less frequently than the jog dial 317a, is positioned so that the operator can easily use it with his / her elbow away from the armrest 316a2.

[0034] FIG. 4 is a plan view of jog dial 317a. Jog dial 317a is provided with: dial portion 317a1 that protrudes from the main body of the box; and button 317a2 that is located in the center of the dial portion and that selects the highlighted icon and executes a decision to cause a screen transition or the like; button 317a3 that is located in the lower left of the dial portion and that transitions to a menu screen; button 317a4 that is located next to button 317a3 and that transitions to a home screen; and button 317a5 that is located next to button 317a4 and that transitions to the previous screen.

[0035] Jog dial 317a is arranged so that protruding dial portion 317a1 faces display device 315, making it easy to operate the dial from seat 312 and to operate buttons 317a3, 317a4, and 317a5.

[0036] The jog dial 317a is arranged next to the base end of the operation lever 313b1. 6a2 is disposed at a position where an operator can easily operate the jog dial 317a and the operation lever 313b1 while resting his / her elbow on the jog dial 317a and the operation lever 313b1.

[0037] FIG. 5 is a plan view of keypad 317b. Keypad 317b is composed of keys 317b1, 317b2, 317b3, 317b4, 317b5, 317b6, 317b7, 317b8, 317b9, and 317b0 arranged in two rows in the front-to-back direction, and numbers 1 to 9 and 0 are printed on each key.

[0038] The keypad 317b is disposed above the right side of the key switch 316a3, and when the engine key 316a3 is turned to the key-on position, by extending one's hand upward, the start of the engine is permitted by pressing a key on the keypad 317b to input a password in response to a password request displayed on the display unit 315a, and when the password is authenticated, the engine is started by turning the engine key 316a3 to the start position. The keypad 317b is an authentication device for performing an authentication operation to permit the start of the engine (prime mover) of the hydraulic excavator 100, and a series of operations can be smoothly performed, in which, after the key switch 316a3 is turned to the key-on position, a password is input using the keypad 317b, the display unit 315 is operated using the jog dial 317a, and the engine key 316a3 is turned to the start position.

[0039] The keypad 317b has not only numbers printed thereon for entering a password but also icons printed thereon representing the functions of the hydraulic excavator 100, and the keypad 317b functions as a function enable switch that enables the functions represented by the icons.

[0040] Keys 317b1 and 317b2 each have an icon representing a lamp printed thereon. When key 317b1 is pressed, a light that illuminates the front turns on, and when key 317b2 is pressed, a light that illuminates the rear turns on.

[0041] Key 317b3 is a switch for selecting an eco mode that prioritizes fuel efficiency by reducing the engine speed, and key 317b4 is a switch for selecting an auto-deceleration mode that reduces the engine speed to idle speed if the operating lever is not operated for a certain period of time.

[0042] The key 317b5 is a switch for selecting a crane mode for safely performing lifting work, and the key 317b6 is a switch for switching the monitoring image of the periphery of the hydraulic excavator 100 displayed on the display unit 315a.

[0043] The key 317b7 is a switch that operates the wipers, and the key 317b8 is a switch that operates the wipers and also sprays washer fluid.

[0044] The key 317b9 is a switch for switching the traveling motor 211 from first speed to second speed, and the key 317b0 is a switch for stopping the alarm sound that is emitted by the hydraulic excavator 100 while it is traveling.

[0045] Some of the functions of the hydraulic excavator 100 assigned to the keypad 317b can be enabled by operating the display device 315 with the jog dial 317a.

[0046] In other words, by locating keypad 317b, which is an authentication device for authorizing the operation of the prime mover of hydraulic excavator 100 and which includes a switch assigned with the same function as the operation for enabling the functions of hydraulic excavator 100 by operating display device 315 with jog dial 317a, in a position closer to arm rest 316a2 than jog dial 317a, frequently used routine operations can be easily performed.

[0047] When viewed from a position facing the back of the driver's seat 312, the jog dial 317a and the keypad 317b are located between the operating lever 313b1 and the operating lever 318, and also between the arm rest 316b1 and the operating lever 318. These configurations make it possible to smoothly operate the display device 315 using the jog dial 317a without impairing the operability of the operating lever 313b1 and the operating lever 318.

[0048] When viewed from a position facing the back of the driver's seat 312, the grip of the operation lever 318 is inclined toward the seat 312 and is located above the jog dial 317a and keypad 317b. This configuration allows smooth switching between the operation of the operation lever 318 and the operation of the jog dial 317a.

[0049] A display unit 315a is disposed above a jog dial 317a in a position facing the rear of the driver's seat 312, ensuring operability of the jog dial 317a and visibility of the display unit 315a.

[0050] In a position facing the back of the driver's seat 312, the operation button 315b is disposed between the jog dial 317a and the display unit 315a, ensuring operability of the jog dial 317a and the operation button 315b and visibility of the display unit 315a.

[0051] In a position facing the rear of the driver's seat 312, an accelerator 317e is disposed above the right side (one side) of the key switch 316a3, and a jog dial 317a is disposed above the right side (one side) of the accelerator 317e. In other words, by disposing the operating tools that are used frequently at the top, the operability of the operator is improved.

[0052] The second embodiment of the present invention will be described in detail below, with the explanation of parts common to the first embodiment being omitted.

[0053] Fig. 6 is a plan view of driver's seat 510, with the floor surface and some of the equipment arranged on the floor surface omitted. Fig. 7 is a schematic diagram of driver's seat 510 as viewed from the back of seat 512.

[0054] On one side of the seat 512, the right side, there is disposed a lever console 516a having an operating lever 513b1 standing at the front upper end and an armrest 516a2 disposed behind the operating lever 513b1, and on the other side of the seat 512, the left side, there is disposed a lever console 516b having an operating lever 513b2 standing at the front upper end and an armrest 516b1 disposed behind the operating lever 513b2, and the operating lever 513b1 and the operating lever 513b2 can be used to operate the work machine 400. The lever console 516a forms an inclined surface that slopes downward behind the armrest 516a2, and a key switch 516a3 is disposed on the inclined surface.

[0055] A console 517 is formed along the right side of the lever console 516a from the front to the rear of the seat 512 and is equipped with an LCD monitor 515 at the front. The display unit 515a of the LCD monitor 515 and the operation button 515b for operating the LCD monitor 515 located below it are both positioned to face the seat 512.

[0056] A duct is formed inside the console 517 through which air exhausted from the air conditioning unit flows, and air conditioning outlets 514a and 514b, from which conditioned air is blown out, are located above and to the lower right of the LCD monitor 515.

[0057] An operating lever 518 for operating the soil removal device 215 is provided on the right side of the console 517 , and the grip of the operating lever 518 is inclined towards the seat 512 so as to be located above the console 517 .

[0058] A jog dial 517a for operating the display device 515 is located behind the operating lever 513b1 on the top surface of the console 517, and behind that is a keypad 517b which is an authentication device for performing authentication operations to permit the start-up of the engine (prime mover) of the hydraulic excavator 100, and further behind that is a storage section 517c which is formed by recessing the top surface of the console 517 and raising it around it, and this storage section 517c can store not only beverages but also a mobile phone, etc.

[0059] An accelerator 517e is disposed in front of the operating lever 513b1 and behind the display device 515, at a recessed position on the upper side of the console 517.

[0060] Jog dial 517a is located to the right rear of operating lever 513b1, which is located on the right side (one side) near the front of seat 512, which is located behind display device 510 arranged on the front side of driver's seat 510, and to the left rear of operating lever 518 in the neutral position, and is further located in front of keypad 517b, and accelerator 517e is located in front of operating lever 513b1. In other words, operability is improved by arranging operating tools that are operated frequently in positions close to armrest 516a2.

[0061] When viewed from a position facing the back of the driver's seat 512, the jog dial 517a can be said to be located between the operating lever 513b1 and the operating lever 518, and also between the arm rest 516a2 and the operating lever 518. These configurations enable smooth operation of the display device 315 with the jog dial 517a, without impairing the operability of the operating lever 513b1 and the operating lever 518. Note that in this embodiment, the jog dial 517a is located in a position hidden by the housing portion 517c, but this does not prevent the jog dial 517a from being located between the operating lever 513b1 and the operating lever 518.

[0062] Next, a modified example of the second embodiment of the present invention will be described. Note that a description of the common parts between the first and second embodiments will be omitted.

[0063] FIG. 8 is a plan view of the driver's seat 610, with the floor surface and some of the equipment arranged on the floor surface omitted.

[0064] On one side (right side) of the seat 612, a lever console 616a is arranged. The lever console 616a has an operating lever 613b1 standing at the front upper end and an armrest 616a2 disposed behind the operating lever 613b1.

[0065] A liquid crystal monitor 615 is provided at the front of a console 617 formed along the right side of the lever console 616a, and an operating lever 618 for operating the earth removal device 215 is provided upright on the right side of the console 617.

[0066] On the top surface of the console 617, and in front of the operating lever 613b1, there is a jog dial 617a for operating the display device 615, and behind that is a keypad 617b which is an authentication device for performing authentication operations to permit the start-up of the prime mover of the hydraulic excavator 100, and further behind that is an operating switch 616a1 for the air conditioning system.

[0067] The jog dial 617a is located to the right of and in front of an operating lever 613b1 located on the right side (one side) near the front of the seat 612 located behind the display device 615 located on the front side of the driver's seat 610, and to the left of an operating lever 618 in a neutral position, and is further located in front of the keypad 617b. According to this configuration, the operating lever and keypad 617b for operating the work machine 400 and the soil removal device 215 can be located in the vicinity of the armrest 616a2, and the operability of other operating tools can be prioritized over the operability of the jog dial 617a.

[0068] The authentication device of the first embodiment, the second embodiment, and the modified example of the second embodiment may be a biometric authentication device such as fingerprint authentication or vein authentication.

[0069] The invention according to the embodiment of the present invention can be specified as follows.

[0070] <Supplementary Note 1> A work machine including an upper body rotatably supported on a lower traveling body equipped with an earth removal device, and a working implement supported on the upper body, the work machine including a first lever arranged next to one side of a driver's seat of the work machine for operating the working implement, a second lever arranged to the side of one side of the first lever for operating the earth removal device, a display device arranged in front of the driver's seat, the first lever, and the second lever, and a jog dial for operating the display device, the jog dial being between the first lever and the second lever in a position facing the driver's seat from behind.

[0071] <Appendix 2> A work machine as described in appendix 1, wherein the jog dial is disposed next to the first lever in a plan view.

[0072] <Appendix 3> A working machine as described in appendix 1 or appendix 2, wherein a display unit of the display device is located above the jog dial at a position facing the driver's seat from behind.

[0073] <Appendix 4> A working machine as described in any one of Appendices 1 to 3, wherein the display device is provided with an operating tool for operating the display device, and the operating tool is disposed between the display unit and the jog dial at a position facing the driver's seat from behind.

[0074] <Appendix 5> A key switch for starting the prime mover of the working machine is disposed behind the first lever on a console on which the first lever is erected, and the jog dial is disposed at a position facing the back of the driver's seat. 5. The working machine according to claim 1, wherein the key switch is disposed above the key switch.

[0075] <Appendix 6> A work machine as described in any one of appendices 1 to 5, further comprising an authentication device provided adjacent to the jog dial for performing an authentication operation to permit start-up of the prime mover after the key switch is turned on.

[0076] <Appendix 7> A work machine as described in any one of appendices 1 to 6, wherein the jog wheel is disposed in front of the authentication device.

[0077] <Appendix 8> A work machine described in any one of appendices 1 to 6, wherein the authentication device is disposed next to the second lever.

[0078] The various configurations described in the first embodiment, the second embodiment, and the modifications thereof described above can be adopted in appropriate combination.

[0079] In the above, a hydraulic excavator has been used as an example of a work machine, but the work machine is not limited to a hydraulic excavator and may be not only a compact track loader, a wheel loader, or other construction machine, but also a tractor or other work machine. Furthermore, although an engine has been used as the prime mover in the above description, an electric motor may also be used.

[0080] Although the embodiment of the present invention has been described above, the scope of the present invention is not limited to this, and the invention can be expanded or modified without departing from the spirit of the invention. [Industrial Applicability]

[0081] The present invention relates to a work machine and has industrial applicability. [Explanation of symbols]

[0082] 315 Display device 312 Driver's seat 313b1 First lever (operating lever) 318 Second lever (operating lever) 317a Jog dial

Claims

1. A work machine comprising an upper body rotatably supported on a lower traveling body equipped with an earth removal device, and a working machine supported on the upper body, comprising: a first lever for operating the working machine, arranged next to one side of a driver's seat of the work machine; a second lever for operating the earth removal device, arranged to the side of one side of the first lever; a display device arranged in front of the driver's seat, the first lever and the second lever; and a jog dial for operating the display device, wherein the jog dial is between the first lever and the second lever in a position facing the driver's seat from behind.

2. The work machine according to claim 1 , wherein the jog dial is disposed adjacent to the first lever in a plan view.

3. 3. A work machine according to claim 1, wherein a display portion of said display device is located above said jog dial at a position facing said operator's seat from behind.

4. 4. A work machine according to claim 3, wherein the display device is provided with an operating tool for operating the display device, the operating tool being disposed between the display unit and the jog dial at a position facing the back of the driver's seat.

5. 5. The work machine according to claim 4, wherein a key switch for starting a prime mover of the work machine is disposed rearward of the first lever in a console on which the first lever is erected, and the jog dial is disposed above the key switch in a position facing the back of the operator's seat.

6. 6. The work machine according to claim 5, further comprising an authentication device provided adjacent to the jog dial for performing an authentication operation to permit start-up of the prime mover after the key switch is turned on.

7. 7. A work machine according to claim 6, wherein the jog wheel is disposed in front of the authentication device.

8. The work machine according to claim 7, wherein the authentication device is disposed adjacent to the second lever.

Images