JP2016078651A - Work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work vehicle which enables an operator to adjust acceleration characteristics while watching a screen, and facilitates its operation.SOLUTION: A work vehicle is equipped with an engine 12, and a continuously variable transmission 33 which converts the rotational power of the engine 12. In a work vehicle (a tractor 1) which can start by changing an actuation state of the continuously variable transmission 33, a display 2 is provided near a driver's seat 161. The display 2 can indicate a screen (a traveling customized screen S5) for adjusting acceleration characteristics.SELECTED DRAWING: Figure 16

Description

  The present invention relates to a work vehicle.

  Conventionally, a tractor which is a typical work vehicle is known (see Patent Document 1). When the tractor starts from a stopped state, a so-called shift shock occurs. This is because a driving force (a force for starting the tractor) is generated sharply in response to the operation of the operator.

  By the way, the tractor is provided with a continuously variable transmission, and can start by changing the operating state of the continuously variable transmission. Therefore, a tractor that can adjust the response speed of the continuously variable transmission has been proposed in order to suppress a shift shock. That is, there has been proposed a tractor that can adjust the acceleration characteristic at the time of starting. However, the operation for adjusting the acceleration characteristics is sometimes difficult because it is difficult for the operator to imagine changes before and after the adjustment.

JP 2013-183709 A

  An object of the present invention is to provide a work vehicle in which an operator can adjust an acceleration characteristic while looking at a screen and the operation is easy.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

The invention according to claim 1
Engine,
A continuously variable transmission that converts the rotational power of the engine,
In a work vehicle that can start by changing the operating state of the continuously variable transmission,
It has a display near the driver's seat,
The display can display a screen for adjusting acceleration characteristics.

The invention according to claim 2 is the work vehicle according to claim 1,
A transmission including the continuously variable transmission;
A shift lever for changing the operating state of the transmission,
The display can display a screen for adjusting an acceleration characteristic for each operation position of the shift lever.

The invention according to claim 3 is the work vehicle according to claim 1 or 2,
The display is capable of displaying a slide bar having one end side in a direction with a slow acceleration characteristic and the other end side in a direction with a sharp acceleration characteristic.

  As effects of the present invention, the following effects can be obtained.

  According to the invention described in claim 1, the work vehicle includes the display in the vicinity of the driver seat. The display can display a screen for adjusting the acceleration characteristics. Thereby, since this operator can adjust an acceleration characteristic while an operator looks at a screen, this operation becomes easy.

  According to the second aspect of the present invention, the work vehicle includes a transmission including a continuously variable transmission and a shift lever that changes an operating state of the transmission. And a display can display the screen for adjusting an acceleration characteristic for every operation position of a shift lever. Thereby, this work vehicle can change an acceleration characteristic for every operation position of a shift lever.

  According to the third aspect of the present invention, the display can display a slide bar in which one end side is in a direction with a slow acceleration characteristic and the other end side is in a direction with a sharp acceleration characteristic. Thereby, this work vehicle becomes easy to image the change before and behind adjustment.

The figure which shows a tractor. The figure seen from the arrow X of FIG. The figure seen from the arrow Y of FIG. The figure seen from the arrow Z of FIG. The figure which shows the power transmission system of a tractor. The figure which shows a continuously variable transmission. The figure which shows the driver's seat of a tractor, and its circumference | surroundings. The figure which shows a visual field of an operator. The figure which shows the information network of a tractor. The figure which shows a display. The figure which shows the control system regarding a display. The figure which shows the screen displayed on the display. The figure which shows the screen displayed on the display. The figure which shows the screen displayed on the display. The figure which shows the screen displayed on the display. The figure which shows the screen displayed on the display.

  The technical idea of the present invention can be applied to any work vehicle. In the present application, description will be made using a tractor which is a typical work vehicle.

  First, the tractor 1 will be briefly described.

  FIG. 1 shows a tractor 1. 2 is a view as seen from the arrow X in FIG. 1, and FIG. 3 is a view as seen from the arrow Y in FIG. FIG. 4 is a view seen from the arrow Z in FIG. In addition, in the figure, the front-back direction, the left-right direction, and the up-down direction of the tractor 1 are represented.

  The tractor 1 mainly includes a frame 11, an engine 12, a transmission 13, a front axle 14, and a rear axle 15. Further, the tractor 1 includes a cabin 16. The cabin 16 has a cockpit inside, and an accelerator pedal 162 and a shift lever 163 are arranged in addition to the driver's seat 161 (see FIG. 7).

  The frame 11 forms a skeleton at the front portion of the tractor 1. The frame 11 constitutes the chassis of the tractor 1 together with the transmission 13 and the rear axle 15. The engine 12 described below is supported by the frame 11.

  The engine 12 converts thermal energy obtained by burning fuel into kinetic energy. That is, the engine 12 generates rotational power by burning fuel. The engine 12 is connected to an engine control device (not shown). When the operator operates the accelerator pedal 162 (see FIG. 7), the engine control device changes the operating state of the engine 12 according to the operation. Further, the engine 12 is provided with an exhaust purification device 12E. The exhaust purification device 12E oxidizes particulates, carbon monoxide, hydrocarbons, etc. contained in the exhaust.

  The transmission 13 transmits the rotational power of the engine 12 to the front axle 14 and the rear axle 15. The rotational power of the engine 12 is input to the transmission 13 via a coupling mechanism. The transmission 13 is provided with a continuously variable transmission 33 (see FIG. 5). When the operator operates the shift lever 163 (see FIG. 7), the continuously variable transmission 33 changes the operating state of the transmission 13 according to the operation.

  The front axle 14 transmits the rotational power of the engine 12 to the front tire 141. The rotational power of the engine 12 is input to the front axle 14 via the transmission 13. The front axle 14 is provided with a steering device (not shown). When the operator operates the handle 164 (see FIG. 7), the steering device changes the steering angle of the front tire 141 according to the operation.

  The rear axle 15 transmits the rotational power of the engine 12 to the rear tire 151. The rotational power of the engine 12 is input to the rear axle 15 via the transmission 13. The rear axle 15 is provided with a PTO output device (not shown). When the operator operates the PTO switch 165 (see FIG. 7), the PTO output device transmits rotational power to the working machine to be pulled according to the operation.

  Next, the power transmission system of the tractor 1 will be described.

  FIG. 5 shows a power transmission system of the tractor 1. FIG. 6 shows the continuously variable transmission 33.

  The power transmission system of the tractor 1 mainly includes an engine 12, a transmission 13, a front axle 14, and a rear axle 15. Here, the description will be made focusing on the structure of the transmission 13.

  The transmission 13 includes a continuously variable transmission 33, a forward / reverse switching device 34, and an auxiliary transmission 35.

  The continuously variable transmission 33 can continuously change the ratio of the rotational speeds of the input shaft 331 and the output shaft 332. The input shaft 331 is connected to a plunger block 333 that is rotatably supported. The plunger block 333 delivers high-pressure hydraulic oil and functions as a hydraulic pump 33P. The output shaft 332 is connected to a motor case 334 that is rotatably supported. The motor case 334 rotates by receiving high-pressure hydraulic oil and functions as a hydraulic motor 33M. A forward drive gear 335 and a reverse drive gear 336 are attached to the output shaft 332.

  The forward / reverse switching device 34 can operate the forward clutch 341 and the reverse clutch 342 independently of each other. The forward clutch 341 has a forward driven gear 343 that meshes with the forward drive gear 335. The forward clutch 341 operates to transmit the rotational power of the output shaft 332 to the center shaft 345. The reverse clutch 342 has a reverse driven gear 344 that meshes with the reverse drive gear 336 via a reverse gear. The reverse clutch 342 is operated to transmit the rotational power of the output shaft 332 to the center shaft 345. An ultra-low speed drive gear 346, a first speed drive gear 347, and a second speed drive gear 348 are attached to the center shaft 345.

  The auxiliary transmission 35 can operate the ultra-low speed clutch 351, the first speed clutch 352, and the second speed clutch 353 independently of each other. The ultra-low speed clutch 351 has an ultra-low speed driven gear 354 that meshes with the ultra-low speed drive gear 346. The ultra-low speed clutch 351 operates to transmit the rotational power of the center shaft 345 to the counter shaft 357. The first speed clutch 352 has a first speed driven gear 355 that meshes with the first speed drive gear 347. The first speed clutch 352 operates to transmit the rotational power of the center shaft 345 to the counter shaft 357. Second speed clutch 353 has second speed driven gear 356 that meshes with second speed drive gear 348. The second speed clutch 353 operates to transmit the rotational power of the center shaft 345 to the counter shaft 357. A front drive gear 358 and a rear drive gear 359 are attached to the counter shaft 357.

  With such a structure, the rotational power of the counter shaft 357 is transmitted to the front tire 141 via the front axle 14. Further, the rotational power of the counter shaft 357 is transmitted to the rear tire 151 via the rear axle 15.

  By the way, the continuously variable transmission 33 can change the rotational speed of the output shaft 332 by changing the operating state. More specifically, the continuously variable transmission 33 can change the rotational speed of the output shaft 332 by moving the cradle 337 and changing the amount of hydraulic oil delivered. Therefore, when the continuously variable transmission 33 stops the rotation of the output shaft 332, the tractor 1 stops from the traveling state. Similarly, when the continuously variable transmission 33 rotates the output shaft 332, the tractor 1 travels from a stopped state (the tractor 1 starts).

  Next, the cockpit of the tractor 1 will be described.

  FIG. 7 shows the driver seat 161 and its surroundings. FIG. 8 shows the field of view of the operator.

  As described above, the cabin 16 has a cockpit inside, and an accelerator pedal 162 and a shift lever 163 are arranged in addition to the driver's seat 161. A brake pedal 166, a clutch pedal 167, a reverser lever 168, a speed dial 169, an instrument panel 170, a control panel 171 and the like are disposed around the driver seat 161. The operator can operate the tractor 1 by operating the accelerator pedal 162 and the shift lever 163 while sitting on the driver's seat 161. Note that when the operator operates the shift lever 163, the auxiliary transmission 35 is activated. Then, the rotational power is transmitted according to the operation position of the shift lever 163 (any one of “ultra-low speed”, “first speed”, and “second speed” positions).

  Further, the tractor 1 includes the display 2 in the vicinity of the driver seat 161. The display 2 is disposed on the right front side of the driver seat 161 so that the operator can operate with the right hand. Hereinafter, the information network of the tractor 1 will be briefly described, and the display 2 and a control system related to the display 2 will be described.

  FIG. 9 shows an information network of the tractor 1. FIG. 10 shows the display 2. FIG. 11 shows a control system related to the display 2.

  The tractor 1 is provided with information networks in various places so that the maximum performance can be exhibited. Specifically, in addition to the engine 12, the transmission 13, the instrument panel 170, the control panel 171, and the display 2 constitute a controller area network (CAN) that can share information with each other.

  In the tractor 1, the display 2 is disposed on the side console (see FIGS. 7 and 8). The display 2 has a liquid crystal panel 21, an encoder dial 22, and an enter button 23. The display 2 has five command buttons 24, 25, 26, 27, and 28.

  The liquid crystal panel 21 is provided in the center of the front surface of the display 2. The liquid crystal panel 21 can display a predetermined screen based on an instruction from the control device 3. For example, the liquid crystal panel 21 can display the opening screen S1 based on an instruction from the control device 3 (see FIG. 12). The liquid crystal panel 21 can display other screens based on instructions from the control device 3 (see FIGS. 13 to 16). The liquid crystal panel 21 may be a so-called touch panel.

  The encoder dial 22 is provided on the right side of the upper surface of the display 2. The encoder dial 22 can transmit the operator's intention to scroll the tab or traverse the highlight to the control device 3 when selecting the element displayed on the liquid crystal panel 21. For example, the encoder dial 22 can transmit the operator's intention to scroll the tab to the control device 3 when selecting the displayed number or alphabet (see FIG. 13). The encoder dial 22 can transmit the operator's intention to traverse the highlight to the control device 3 when selecting the displayed icon (see FIGS. 14 and 15).

  The enter button 23 is provided integrally with the encoder dial 22. The enter button 23 can transmit to the control device 3 the operator's intention that one of the elements displayed on the liquid crystal panel 21 has been determined. For example, the enter button 23 can transmit the operator's intention to the effect of determining one of the displayed numbers and English characters to the control device 3 (see FIG. 13). In addition, the enter button 23 can transmit the operator's intention to the effect that the one of the displayed icons has been determined to the control device 3 (see FIGS. 14 and 15). In the display 2, the enter button 23 has a structure in which the encoder dial 22 itself is pushed, but may have a structure in which a push button is provided on the upper end surface of the encoder dial 22.

  The command buttons 24, 25, and 26 are provided on the upper front portion of the display 2. The command buttons 24, 25, and 26 can transmit an operator's intention to switch to another screen to the control device 3 when a predetermined screen is displayed on the liquid crystal panel 21. For example, the command buttons 24 and 25 can transmit the operator's intention to switch to the shortcut screen (the screen arbitrarily set by the operator) to the control device 3 when the home screen S3 is displayed on the liquid crystal panel 21 ( (See FIG. 14). Further, the command button 26 can transmit the operator's intention to switch to the home screen S3 to the control device 3 when the customization screen S4 is displayed on the liquid crystal panel 21 (see FIG. 15).

  A command button 27 is also provided at the upper front of the display 2. Specifically, it is provided at a position adjacent to the command button 26. As with the enter button 23, the command button 27 can transmit the operator's intention to the effect that the one element has been determined to the control device 3. For example, the command button 27 can transmit the operator's intention to the effect of determining one of the displayed numbers or English characters to the control device 3 (see FIG. 13). Further, the command button 27 can transmit the operator's intention to the effect that the one of the displayed icons has been determined to the control device 3 (see FIGS. 14 and 15). Further, the command button 27 can transmit the operator's intention to store the setting items to the control device 3 (see FIG. 16).

  A command button 28 is also provided at the upper front of the display 2. Specifically, it is provided at a position adjacent to the command button 27. The command button 28 can transmit the operator's intention to return to the previous screen to the control device 3 when a predetermined screen is displayed on the liquid crystal panel 21. For example, the command button 28 can transmit the operator's intention to return to the home screen S3 to the control device 3 when the customization screen S4 is displayed on the liquid crystal panel 21 (see FIG. 15). Further, the command button 28 can transmit the operator's intention to return to the customization screen S4 to the control device 3 when the travel customization screen S5 is displayed on the liquid crystal panel 21 (see FIG. 16).

  The operation method for adjusting the acceleration characteristics will be described below.

  12 to 16 show screens displayed on the display 2. However, each figure shows only a part necessary for the description of the present invention in a simplified manner.

  First, an opening screen S1 is displayed on the display 2 (see FIG. 12). On the opening screen S1, a symbol mark Sm is displayed near the center. The symbol mark Sm is a design symbolizing the supplier manufacturer. The symbol mark Sm floats on a black background image and gives a strong impression to the operator.

  Next, the lock release screen S2 is displayed on the display 2 (see FIG. 13). On the unlock screen S2, scroll boxes Sb1, Sb2, Sb3, and Sb4 for inputting the password are displayed in a horizontal row. Any one of the scroll boxes Sb1, Sb2, Sb3, and Sb4 is highlighted (refer to part H in the figure). The scroll boxes Sb1, Sb2, Sb3, and Sb4 can scroll numbers from 0 to 9 or English letters from A to F. The operator can select a number or alphabet by turning the encoder dial 22 and press the enter button 23 to determine.

  In the unlock screen S2, it is possible to select numbers or letters by pressing the command buttons 25 and 26 and to determine by pressing the command button 27. The decision can also be canceled by pressing the command button 28. In addition, if the password is wrong, a message to that effect is displayed. On the unlock screen S2, a dialog box Db1 in which the name of the operator is written and a dialog box Db2 in which the work schedule is written are displayed. The operator can grasp his / her work schedule from these dialog boxes Db1 and Db2.

  Next, the home screen S3 is displayed on the display 2 (see FIG. 14). On the home screen S3, icons Ia1, Ia2, Ia3, Ia4,... Ia8 for selecting menus are displayed in two upper and lower rows. One of the selected icons Ia1, Ia2, Ia3, Ia4,... Ia8 is highlighted (refer to the portion H in the figure). The highlight is traversed according to the rotation of the encoder dial 22. The operator can select the desired icon (any one of Ia1, Ia2, Ia3, Ia4... Ia8) by turning the encoder dial 22 and press the enter button 23 to determine.

  On the home screen S3, it is possible to select an icon (any one of Ia1, Ia2, Ia3, Ia4... Ia8) by pressing a command button (any one of 24, 25, 26, 27, and 28). Although not possible, it can be determined by pressing the command button 27. Further, when the command button 28 is pressed, the screen can return to the unlock screen S2. In addition, when the button Ba1 marked "Previous page" or the button Ba2 marked "Next page" is selected and determined, the screen is switched to another home screen S3. Icons that cannot be selected are grayed out (see part G in the figure).

  Here, the icon Ia2 labeled “tractor setting” is selected and determined.

  A customization screen S4 is displayed on the display 2 (see FIG. 15). On the customization screen S4, icons Ib1, Ib2, Ib3, Ib4... Ib8 for selecting menus are displayed in two columns on the left and right. One of the selected icons Ib1, Ib2, Ib3, Ib4,... Ib8 is highlighted (see the H part in the figure). The highlight is traversed according to the rotation of the encoder dial 22. The operator can determine by selecting a desired icon (any one of Ib1, Ib2, Ib3, Ib4... Ib8) by turning the encoder dial 22, and pressing the enter button.

  On the customization screen S4, it is possible to select an icon (Ib1, Ib2, Ib3, Ib4, ... Ib8) by pressing a command button (any one of 24, 25, 26, 27, and 28). Although not possible, it can be determined by pressing the command button 27. Further, when the command button 28 is pressed, the home screen S3 can be returned. In addition, when the button Bb1 marked “Previous Page” or the button Bb2 marked “Next Page” is selected and determined, the screen is switched to another customization screen S4. Icons that cannot be selected are grayed out (not shown).

  Next, it is assumed that the icon Ib1 marked “travel” on the customization screen S4 is selected and determined.

  A travel customization screen S5 is displayed on the display 2 (see FIG. 16). On the travel customization screen S5, the acceleration characteristic can be adjusted for each operation position of the shift lever 163 ("ultra-low speed", "first speed", "second speed" positions). On the travel customization screen S5, three slide bars Sc1, Sc2, and Sc3 are displayed at the top and bottom. Hereinafter, the meaning of each slide bar Sc1, Sc2, and Sc3 will be described in detail.

  The slide bar Sc1 is a part that allows adjustment of acceleration characteristics when the operation position of the shift lever 163 is “ultra-low speed”. In the slide bar Sc1, the left end side has a slow acceleration characteristic, and the right end side has a sharp acceleration characteristic. Moreover, in the substantially center part of slide bar Sc1, arrow Ac has shown the position used as a standard state. Therefore, when the indicator Ic1 of the slide bar Sc1 is on the left side of the arrow Ac, an acceleration characteristic that is slower than the standard state is realized, and the acceleration is performed slowly with respect to the operation of the operator. On the contrary, when the indicator Ic1 of the slide bar Sc1 is on the right side of the arrow Ac, an acceleration characteristic that is sharper than that in the standard state is realized, and the operator quickly accelerates the operation. The operator can determine by extending or shortening the indicator Ic 1 by turning the encoder dial 22 and pressing the enter button 23.

  The slide bar Sc2 is a part that allows adjustment of acceleration characteristics when the operation position of the shift lever 163 is “first speed”. In the slide bar Sc2, the left end side has a slow acceleration characteristic, and the right end side has a sharp acceleration characteristic. Moreover, in the substantially center part of slide bar Sc2, arrow Ac has shown the position used as a standard state. Therefore, when the indicator Ic2 of the slide bar Sc2 is on the left side of the arrow Ac, an acceleration characteristic that is slower than the standard state is realized, and the operator accelerates slowly with respect to the operation of the operator. On the other hand, when the indicator Ic2 of the slide bar Sc2 is on the right side of the arrow Ac, an acceleration characteristic that is sharper than that in the standard state is realized, and the operator quickly accelerates the operation. The operator can determine by extending or shortening the indicator Ic 2 by turning the encoder dial 22 and pressing the enter button 23.

  The slide bar Sc3 is a portion that enables adjustment of acceleration characteristics when the operation position of the shift lever 163 is “second gear”. In the slide bar Sc3, the left end side has a slow acceleration characteristic, and the right end side has a sharp acceleration characteristic. In addition, in the substantially central portion of the slide bar Sc3, the arrow Ac indicates the position where the standard state is obtained. Therefore, when the indicator Ic3 of the slide bar Sc3 is on the left side of the arrow Ac, an acceleration characteristic that is slower than the standard state is realized, and the acceleration is performed slowly with respect to the operation of the operator. On the contrary, when the indicator Ic3 of the slide bar Sc3 is on the right side of the arrow Ac, an acceleration characteristic that is sharper than that in the standard state is realized, and the operator quickly accelerates the operation. The operator can determine by extending or shortening the indicator Ic3 by turning the encoder dial 22 and pressing the enter button 23.

  Thus, the tractor 1 (work vehicle) includes the display 2 in the vicinity of the driver seat 161. The display 2 can display a screen for adjusting acceleration characteristics (travel customization screen S5). As a result, the tractor 1 (work vehicle) can adjust the acceleration characteristic while the operator looks at the screen (travel customization screen S5), so that the operation becomes easy.

  More specifically, the display 2 can display a screen (travel customization screen S5) for adjusting acceleration characteristics for each operation position of the shift lever 163. Thereby, the tractor 1 (work vehicle) can change the acceleration characteristic for each operation position of the shift lever 163.

  In addition, the display 2 can display slide bars Sc1, Sc2, and Sc3 in which one end side is in a direction that has a slow acceleration characteristic and the other end side is in a direction that has a sharp acceleration characteristic. Thereby, this tractor 1 (work vehicle) becomes easy to imagine the change before and behind adjustment.

  In the travel customization screen S5, the indicators Ic1, Ic2, and Ic3 cannot be expanded or shortened by pressing a command button (any one of 24, 25, 26, 27, and 28), but the command button 27 is pressed. Can be determined by The dialog box Dc describes the operation method. When the command button 28 is pressed, it is possible to return to the customization screen S4. Further, when the button Bc1 marked “Previous page” or the button Bc2 marked “Next page” is selected and determined, the screen is switched to another travel customization screen.

1 Tractor (work vehicle)
11 frame 12 engine 13 transmission 14 flint axle 15 rear axle 16 cabin 2 display 21 liquid crystal panel 22 encoder dial 23 enter button 24 command button 25 command button 26 command button 27 command button 28 command button 33 continuously variable transmission 161 driving seat 163 shift lever S5 Customization screen Sc1 Slide bar Sc2 Slide bar Sc3 Slide bar Dc Dialog box

Claims (3)

Engine,
A continuously variable transmission that converts the rotational power of the engine,
In a work vehicle that can start by changing the operating state of the continuously variable transmission,
It has a display near the driver's seat,
The work vehicle characterized in that the display can display a screen for adjusting acceleration characteristics. A transmission including the continuously variable transmission;
A shift lever for changing the operating state of the transmission,
The work vehicle according to claim 1, wherein the display can display a screen for adjusting an acceleration characteristic for each operation position of the shift lever.   3. The display according to claim 1, wherein the display is capable of displaying a slide bar in which one end side is a direction having a slow acceleration characteristic and the other end side is a direction having a sharp acceleration characteristic. Work vehicle.