JP3025641B2 - Operation unit structure of work vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working vehicle equipped with a left and right independent driving mechanism, for example, an agricultural machine such as a combine, a tractor, a transport vehicle, and a construction machine.

[0002]

2. Description of the Related Art Conventionally, there is a combine vehicle, for example, as a work vehicle provided with a left and right independent traveling drive mechanism.
ST "), two operation levers independently provided on the left and right are linked to the trunnion lever of each HST, and the steering operation can be performed by the operation levers.

[0003]

However, when the left and right HSTs are operated by independent left and right operation levers as in the above-described combine, a shift operation for adjusting the traveling speed of the aircraft and an operation of the aircraft are performed. Since the turning operation to perform the direction must be operated by the same lever, the operability is poor, and there is a problem that the driving operation cannot be performed smoothly.

[0004]

Therefore, according to the present invention, a speed change shaft that rotates in conjunction with a speed change operation of a speed change operation tool is mounted on an operation table, and a slide action body and the same slide are mounted on the speed change shaft. A pair of slide members positioned on the side of the operation member are slidably mounted in the axial direction of the transmission shaft, and the slide operation member is slidable in conjunction with the turning operation of the turning operation tool; Either one of the slide members is slidable in conjunction with the slide operation of the slide action member, and both slide members are rotatable integrally with the transmission shaft, and each slide member has a guide member extending in the width direction. Pivotally support the middle part of the
The of the rocking motion in conjunction with the rotation operation of each slide member, each
The posture of the guide body can be changed, and each guide body extends in the width direction, and one side of the arm member that pivotally supports the middle part swingably on the operation table in the longitudinal direction of each guide body. It is an object of the present invention to provide an operation unit structure of a working vehicle, wherein each of the arm members is slidably engaged with another traveling drive adjusting member on the other side of the arm member .

[0005]

When the shift operation tool is operated to the forward side when the body is moved forward, the shift shaft is rotated, and the pair of slide bodies are integrally rotated. The pair of guide members swing to take a tilted posture, and the arm engaging one side with the guide member takes an inclined position by swinging in conjunction with each other, thereby taking each traveling drive adjusting member. By inclining at the same inclination angle to the forward side, the left and right traveling parts of the traveling device can be operated forward.

In this forward running state, when the turning operation tool is turned, for example, to the right, the slide action body slides to one side, and the guide body moves together with the slide body on the slide side to one side. Slide the arm to change the attitude of one arm that has taken an inclined attitude to the original neutral side, and operate the traveling drive adjustment member that is linked to the arm to the neutral side to move the right traveling section. The aircraft can be turned right to decelerate or stop.

Further, in the right-turning state, when the turning operation tool is further turned in the right-turning direction, the slide action body slides the guide body together with the slide body further to one side, thereby setting the inclined posture. The arm on one side is rotated in the opposite direction from the forward direction to the inclined position, and the traveling drive adjustment member linked to the arm is operated to the reverse side, and the right traveling section is operated backward. The aircraft can be turned sharply to the right (spin turn).

[0008] The left turn and the sharp left turn can also be performed by turning the turning operation tool to the opposite side.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

Reference numeral A shown in FIG. 1 denotes an operation unit according to the present invention, and a hydraulic motor provided on an HST (not shown) for driving the left and right traveling units such as a combine as a working vehicle by the operation unit A. The attitude of the left swash plate 84 and the right swash plate 54 for control is changed, and the aircraft is moved forward and backward, turning left and right, and left and right.
You can make a sharp turn right.

As shown in FIG. 1, the operation unit A includes an operation table 10.
Is formed in a rectangular box shape that is long in the width direction.
A handle column 11 is erected at the center of the ceiling wall 10c of the vehicle, and a turning operation tool 18 is mounted on an upper end of a handle support shaft 12 attached to the handle column 11, while a main speed change shaft laid horizontally in the operation console 10. The lower end of a main speed change lever 35 as a speed change operation tool is mounted on a right end protruding portion 34a of 34 via a lever stay 36. 10a is a leg, 10b is a wire stay, 13 is a gear case, 14 is a gear case mounting bracket, 15 is a mounting bolt,
16 is a main transmission lever guide body, and F is a floor.

As shown in FIGS. 3 and 4, the base 12a of the handle support shaft 12 whose axis is oriented vertically between the ceiling wall 10c and the center of the floor 10d of the operation console 10 is rotatable. The pinion gear 23 is mounted at the center of the base 12a. 26a is a bearing body.

As shown in FIG. 2 to FIG.
Between the front portions of the left and right side walls 10e and 10f, a slide shaft 28 whose axis is directed in the left and right width direction and a main transmission shaft 34 are horizontally suspended at a predetermined interval in the front-rear direction. Has a substantially triangular cross-section and is rotatably mounted. 26b is a bearing body.

The middle part of the slide shaft 28 is shown in FIGS.
As shown in the figure, the slide action body 25 is slidably mounted in the left-right width direction, and the slide action body 25 is
28, and an operating body 25b integrally mounted on the base 25a and disposed directly below the main transmission shaft 34, and a lower end of the operating body 25b is provided at the lower end of the operating body 25b. , A rack 24 extending in the width direction
24 meshes with the pinion gear 23. 26c is a rack guide body.

In this manner, when the turning operation tool 18 is rotated leftward or rightward, the base 12 of the handle shaft 12 is rotated.
The sliding action body 25 is slid rightward or leftward via the rack 24 in conjunction with the rotation of the pinion gear 23 attached to a.

As shown in FIGS. 2 to 5, a pair of left and right slide bodies 27 and 30 are attached to the left and right sides of the slide shaft 28 and the main transmission shaft 34 so as to be slidable in the left and right width directions, respectively. Neutral return springs 31, 32 are attached to the outer positions of the left and right slides 27, 30, respectively.
Urges each of the slides 27 and 30 to the neutral state,
A gate-type neutral position stopper 33 is attached to the center of the ceiling wall 10c of the operation console 10, and the slide members 27 and 30 can be stopped at the neutral position by the neutral position stopper 33. As shown in FIGS. 2 to 5, the left slide body 27 has a left arm support portion 37 rotatably fitted to the right end of the outer peripheral surface, and is directed toward the slide shaft 28 from the front outer peripheral surface portion of the left arm support portion 37. To extend the counterclockwise stop body 38 and slide the counterclockwise stop body 38
While being freely slidable in the lateral direction on the outer peripheral surface of
The left guide body support arm 39 is extended rearward and downward from the rear outer peripheral portion of the left arm support portion 37, and a left boss portion 40 is attached to a tip of the arm 39, and is substantially horizontally in the boss portion 40 in the front-rear direction. A pivot pin 41 whose axis is directed to the center of the front wall of a left guide body 42 having a U-shape in section and having a U-shaped cross section, which extends in the left-right width direction at the rear end of the pivot pin 41 and has an open rear surface. The part is fixed. 56 is a bush.

Then, as shown in FIGS. 2 to 4, the left swing arm 43 is extended rearward from the left end of the outer peripheral surface of the left slide body 27, and the tip of the left swing arm 43 can be freely expanded and contracted. The upper end of the left link 44 is connected via a connecting pin 45, and the outer end of the front wall of the left guide body 42 is connected to the lower end of the left link 44 via a connecting pin 46.

As described above, the left guide body 42 is integrally formed with the slide shaft 28 and the main transmission shaft 34 with the left slide body 27 that slides in conjunction with the slide operation of the slide action body 25.
Along the right and left width direction, and swings up and down around the pivot pin 41 integrally with the left slide body that rotates in conjunction with the rotation of the main transmission shaft 34 by the main transmission operation lever 35. I am trying to do it. In FIG. 4, W is a rotation operation range of the main transmission shaft 34, and the left guide body is within the rotation operation range W.
One end of 42 is made to swing vertically.

The structure shown in FIGS. 2 to 5 will be described. First, the configuration of the left arm member for interlockingly connecting the left guide body 42 and the right traveling drive adjusting member will be described. The left arm member mainly includes the left rotor support arm 48 and the left swash plate operating arm 52 as follows. A boss 50 with its axis line extending in the front-rear direction is provided in the rear wall 10g of the operation console 10 in a penetrating state, and an arm support shaft is provided in the boss 50.
The base end of the left rotor support arm 48 extending in the left-right width direction is attached to the inner end of the arm support shaft 51, and the left rotor support arm 48 is pivotably supported vertically. The left rotator 47 is attached to the distal end of the left rotator support arm 48 via a support shaft 49. Also, the base end of the left swash plate operating arm 52 extending in the left-right width direction is fixed to the outer end of the arm support shaft 51 protruding to the outside of the operation console 10 with a fixing bolt 53,
The left swash plate operating arm 52 is pivotally supported so as to be vertically swingable integrally with the left rotor supporting arm 48. The left rotator 47, which corresponds to one side of the left arm member and is attached to the distal end of the left rotator support arm 48 via a support shaft 49, is rotatable on the left guide body 42 and Left guide body 42
Are slidably fitted in the left-right width direction along the line. on the other hand,
At the tip of the left swash plate operating arm 52 corresponding to the other side of the left arm member, a right swash plate for controlling a hydraulic motor is provided.
54 is interlockingly connected via a left connection wire 55. As described above, the right traveling drive adjusting member is formed by the left connecting wire 55 and the right swash plate 54 as an acceleration / deceleration mechanism interlockingly connected to the other end of the left connecting wire 55. Incidentally, 57 is a rotor stopper body, and 58 is a wire connecting pin.

In this way, the rotor support arm 48 swings up and down via the left rotator 47 in conjunction with the left guide body 42 which slides left and right at a fixed angle of inclination. The left swash plate operating arm 52 integrally swings up and down in the opposite direction to the support arm 48 to operate the right swash plate 54 via the left connecting wire 55 to control the hydraulic motor. I can do it.

As described above, the left connecting wire 55 having one end connected to the left swash plate operating arm 52 and the right swash plate 54 serving as a speed increasing / decelerating mechanism connected to the other end of the left connecting wire 55 are provided. Similarly, the right driving wire adjusting member is formed on the right side of the right swash plate operating arm 82, and the right connecting wire 85 is connected to the other end of the right connecting wire 85. A left traveling drive adjusting member is formed from the left swash plate 84 as an acceleration / deceleration mechanism, and both traveling drive adjusting members are disposed at symmetrical positions in the left-right direction. 67 is a right arm support portion, 68 is a right hand stop, 69 is a right guide support arm, 70 is a right boss, 71 is a pivot pin, 72 is a right guide, 72a is a rotor stopper, and 73 is right Swing arm, 74 is right link, 75 and 76 are connection pins, 77 is right rotator, 78 is right rotator support arm, 79
Is a support shaft, 80 is a boss portion, 81 is an arm support shaft, 83 is a fixing bolt, 86 is a bush, 87 is a rotor stopper body, and 88 is a wire connecting pin.

The embodiment of the present invention is configured as described above. The operation and operation mode will be described below with reference to FIGS. 2 and 6 to 9.

That is, when the main shift lever 35 is in the neutral state and the turning operation tool 18 is in the neutral state, as shown in FIG. 6, the left and right guide members 42 and 72, the left and right rotor support arms are provided. 48,78, and left and right swash plate operating arms 52,82
Is in a substantially horizontal position.

In this state, when the main shift lever 35 is shifted to the forward shift position, the main shift shaft 34 rotates, and the left and right slide bodies 27, 30 → the left and right swing arms 43, 73 → the left and right links 44, 74 → The left and right guide bodies 42 and 72 are rotated about the pivot pins 41 and 71, and the left and right rotor support arms 48 and 78 via the left and right rotors 47 and 77 → Arm support shafts 51 and 81 → left and right The swash plate operating arms 52 and 82 are set to the inclined posture shown in FIG.

In this case, the right and left swash plates 84 and 54 for controlling the hydraulic motors have the same inclination angle, and the right and left traveling parts (not shown) operate forward traveling at the same speed, and the body moves straight. I do.

Next, when the turning operation tool 18 is turned to the right from the straight traveling state, for example, the pinion shaft 23 is turned, and the rack 24 meshed with the pinion 23 is moved leftward. The slide action body 25 attached to the rack 24 pushes the left slide body 27 to the left to slide and slide.

Therefore, the left guide body 42 attached to the left slide body 27 is slid to the left while maintaining the inclined posture, and the left rotator 47 fitted to the left end of the left guide body 42 is fitted. As shown in FIG. 8, the left rotor body 27 is engaged with the left slide body 27 at a substantially central position thereof.
The right swash plate operating arm 52 and the right swash plate
Move 54 closer to neutral.

In this case, the right traveling unit is decelerated or stopped, while the left traveling unit performs forward traveling operation, so that the body slowly turns right.

Next, when the turning operation tool 18 is further turned in the right turning direction in the right turning state, the left guide body 42
Sliding further to the left with the inclination posture,
The left rotator fitted at the approximate center position of the left guide body 42
As shown in FIG. 9, 47 is fitted to the right side position of the left slide body 42, and the left rotation support arm 48 and the right swash plate operating arm 52 are tilted to the low left and right high positions. , Right swash plate 54
To the reverse side.

In this case, the right traveling unit operates backward, while the left traveling unit operates forward, so that the aircraft makes a sharp turn to the right (spin turn).

The left turn and the sharp left turn can also be performed by rotating the turning operation tool 18 to the opposite side to the above, and it depends on the operation position of the turning operation tool 18. If the main shift lever 35 is operated to the neutral position, the aircraft stops, and if the main shift lever 35 is operated to the reverse position, the aircraft moves backward, further reverse left / right turn, reverse left / right. The vehicle can be turned sharply and various operations can be performed efficiently.

In this embodiment, the slide members 27, 30 are arranged in the width direction. However, the arrangement of the slide members 27, 30 is not limited to this, and may be in the vertical direction or the oblique direction. .

[0033]

According to the present invention, the following effects can be obtained.

That is, a straight-ahead operation, a left / right turning operation, and a left / right sharp turning operation can be performed by the turning operation tool regardless of the shift operation position of the shift lever for performing forward / reverse shifting of the body. In addition, the driving operation becomes easy, erroneous operation can be prevented, and safety can be improved.

If the shift lever is set to the neutral position irrespective of the operating position of the turning operation tool, the machine stops, so that the traveling speed of the machine according to various operations can be obtained. Work efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a rear view of an operation unit according to the present invention.

FIG. 2 is a partially cutaway rear view of the operation unit.

FIG. 3 is a cross-sectional bottom view of the operation unit.

FIG. 4 is an explanatory left side sectional view of the operation unit.

FIG. 5 is a left sectional side view of the operation unit.

FIG. 6 is an explanatory view showing that the main shift lever is in a neutral position and the turning operation tool is in a neutral state (body stop).

FIG. 7 is an explanatory view showing a state in which the main shift lever is shifted forward, and the turning operation tool is in a neutral state (machine body straight ahead).

FIG. 8 is an explanatory diagram showing that the main shift lever is shifted forward, and the turning operation tool is turning right (the aircraft is turning right).

FIG. 9 shows that the main shift lever is shifted forward, and the turning operation tool shows a right spin turn state (the aircraft turns sharply to the right).
FIG.

[Explanation of symbols]

 A operation part 18 turning operation tool 27 left slide 30 right slide 34 main transmission shaft

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B62D 11/00-11/24

Claims (1)

(57) [Claims] A speed change shaft, which rotates in conjunction with a speed change operation of a speed change operation tool, is provided on an operation console, and a slide action member and a pair of side members located on the side of the slide action body are mounted on the speed change shaft. Are mounted so as to be slidable in the axial direction of the speed change shaft, respectively, and the sliding action body is slidable in conjunction with the turning operation of the turning operation tool, and one of the sliding bodies is a slide of the sliding action body. The slide can be operated in conjunction with the movement, and both slides can be rotated integrally with the speed change shaft. Each slide is pivotally supported at the middle part of the guide that extends in the width direction. while, the oscillating motion of the guide body in conjunction with the rotation of the slide body, and can change the posture of the guide body, each guide body, operating Shinnoshi, the intermediate portion respectively in the width direction Pivoted on the table One side of the over arm member, while slidably engaging the longitudinal direction of the guide body, each arm
Work vehicle operation section structure, characterized in that on the other side of the member is interlockingly connected with each of the travel drive adjustment member.