JP3025640B2 - Operation part structure in HST traveling device - 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, the HST traveling devices are independently provided on the left and right sides of the fuselage, respectively, and the driven arms are interlockingly connected to the acceleration / deceleration mechanism of the hydraulic motor of each HST traveling device. in the configuration and the operation unit structure to the rotation operation member the hydraulic motors of the HST traveling device through the respective <br/> driven arm can individually acceleration and deceleration operation, a pair between the rotation operation member and the follower arm Are arranged via the main transmission shaft, and both slides are configured to slide along the main transmission shaft in conjunction with the operation of the turning operation tool, and each slide is provided with a main transmission shaft. A pair of guide arms that rotate in conjunction with the rotation of
Each guide arm is provided with an operation section structure in the HST traveling device, wherein the driven arm is interlocked so as to be capable of increasing / decelerating.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. In FIG. 1, reference numeral 1 denotes a track frame on which left and right traveling crawlers 2 and 2 are mounted, and 3 denotes an upper part of the track frame 1. It is a machine base that is fixedly supported.

Reference numeral 4 denotes a mowing device connected to the front of the machine base 3, which is composed of a raking reel 5 and a raving auger 6 for raking grain, a clipper-type mowing blade 7, a feeder house 8, and the like. I have.

Reference numeral 9 denotes a threshing unit, which has a spiral toothing on the outer periphery.
A handling drum 11 provided with 10 is disposed in the longitudinal direction of the fuselage.
Reference numeral 12 denotes a sorting device provided below the threshing unit 9 and includes a Karamin 13 and a straw rack 14.

Reference numeral 15 denotes an engine, which drives the reaper 4 and the threshing unit 9 to rotate and drives a hydraulic pump 16. Reference numeral 17 denotes a driving unit, which is provided with a turning operation tool 18 and various operation levers.

Reference numeral 19 denotes an HS for driving the traveling crawlers 2 and 2.
The TST transmission includes a right swash plate 20-1 and a left swash plate 20-2 for controlling the hydraulic motor M, and these constitute an HST traveling device A.

FIGS. 2 and 3 show an operation section structure B of the HST traveling apparatus A. In the figures, reference numeral 21 denotes an operation table on which the turning operation tool 18 is mounted. The turning operation tool 18 is rotatably mounted on an operation table 21 via a support shaft 22, and a gear-shaped pinion 23 is fixed to the support shaft 22.

Reference numeral 24 denotes a rack that meshes with the pinion 23. The rack 24 is movable in the left-right direction. Reference numeral 25 denotes an engagement protrusion protruding below the rack 24, and reference numeral 26 denotes a ball bearing that rotatably supports the support shaft 22.

Reference numeral 27 denotes a left slide body which is located on the left side of the engaging projection 25 of the rack 24 and abuts thereon. The left slide body 27 is connected to slide shafts 28 and 29 arranged on the operation table 21 in the left and right direction. Fitted and supported. And it is movable on the slide shafts 28, 29.

Reference numeral 30 denotes a right slide which is located on the right side of the engaging projection 25 of the rack 24 and abuts on the rack 24. The right slide 30 is also movably fitted to and supported by slide shafts 28 and 29. .

At the left and right outer positions of the left and right slides 27 and 30, neutral return springs 31 and 32 abut, respectively, to bias the left and right slides 27 and 30 to a neutral state. Reference numeral 33 denotes a neutral stopper for stopping the left and right slide bodies 27 and 30 at the neutral position.

Reference numeral 34 denotes the operation table 21 and the right and left slide bodies 27 and 30.
Is a main transmission shaft penetrating in the left-right direction, and a main transmission operation lever 35 is fixed to the left end. And the main transmission shaft 34
Has a hexagonal cross-sectional shape, and at the position of the left slide body 27, the left bevel gear 36 is fitted so as to freely slide only.

Reference numeral 37 denotes a right bevel gear which can be freely slidably fitted to the position of the right slide body 30.
The left and right slides 27 and 30 slide on the main transmission shaft 34 as the left and right slide members 27 and 30 slide in the left and right directions, and are integrally rotatable as the main transmission shaft 34 rotates back and forth.

38 is a driven bevel gear meshing with the left bevel gear 36, 39 is a driven bevel gear meshing with the right bevel gear 37,
40 is a left guide arm shaft for fixing a driven bevel gear 38 on one side, and a left guide arm shaft for fixing a left guide arm 41 having a U-shaped cross section on the other side. A right guide arm shaft for fixing the right guide arm 43 having a U-shaped cross section.

The left and right guide arm shafts 40, 42
Are rotatably fitted to bevel gear boxes 44 and 45 formed integrally with the left slide body 27 and the right slide body 30, respectively.

Reference numeral 46 denotes the left guide arm 41 having a U-shaped cross section.
The central pivot 47 is pivotally supported on the operation console 21 by a left driven arm that engages with.

A turning projection 46-2 provided at one end 46-1 of the left driven arm 46 can be freely fitted to the U-shaped portion of the left guide arm 41, End 46
-3 is connected to the right swash plate 20-1 side for controlling the hydraulic motor via a connecting wire 48. Reference numeral 49 denotes a right driven arm that engages with the right guide arm 43 having a U-shaped cross section.
Are supported on the operation console 21.

A turning projection 49-2 provided at one end 49-1 of the right driven arm 49 can be freely fitted to the U-shaped portion of the right guide arm 43, and the other end of the right driven arm 49 is provided. 49-3
Is connected to the left swash plate 20-2 side for controlling the hydraulic motor via a connection wire 51. 52 is the main transmission lever 35
The shift guide plate that indicates the shift position of
A forward shifting position 52-2 is formed in front of 52-1 and the neutral position
A reverse shift position 52-3 is formed behind 52-1.

The embodiment of the present invention is configured as described above. Therefore, the turning operation tool 18 is set in the neutral state,
In addition, by setting the main speed change operation lever 35 to the forward shift position 52-2, the main speed change shaft 34 rotates, whereby the left bevel gear 36 and the right bevel gear provided on the left slide body 27 and the right slide body 30, respectively. 37 rotates.

The left bevel gear 36 and the right bevel gear 36
The driven bevel gears 38 and 39 meshing with 37 rotate to rotate the left guide arm 41 and the right guide arm 43. Further, the left driven arm 46 and the right driven arm 49, which engage with the left and right guide arms 41, respectively, are rotated by the rotation of the left guide arm 41 and the right guide arm 43, and the state shown in FIG. 5 is obtained. Therefore, in this case, the right and left swash plates 20-1 and 20-2 for controlling the left and right hydraulic motors have the same inclination, and the aircraft travels straight.

Next, when the turning operation tool 18 is rotated clockwise in a state where the main speed change operation lever 35 is set to the forward shift position 52-2, the pinion 23 is rotated, and the pinion 23 is rotated. The rack 24 meshing with 23 moves to the left. And
The left slide body 27 is moved leftward by the engagement projection 25 provided on the rack 24.

Therefore, the left guide arm 41 mounted on the left slide body 27 moves leftward and moves to the left.
And the left driven arm 46 is fitted deeply, and the left driven arm 46 is returned to the stopped state. And FIG.
In this state, the control right swash plate 20-1 interlockingly connected to the left driven arm 46 is brought into the brake state, whereby the aircraft turns right.

When the turning operation tool 18 is further rotated to the right and rotated to the spin turn position, the left guide arm 41 and the left driven arm 46 are further deeply fitted as shown in FIG. The driven arm 46 is rotated to the reverse rotation position. Therefore, in this case, the right swash plate 20-1 is inclined to the reverse side, and the aircraft makes a sharp turn.

As described above, according to the above embodiment, a pair of left and right slide bodies 27 and 30 that slide left and right in conjunction with the operation of the turning operation tool (18) are provided, and the same pair of slide bodies 27 and 30 are provided. 30 is provided with left and right guide arms 41 and 43 that rotate in conjunction with the shifting operation of the main transmission shaft 34. The left and right guide arms 41 and 43 are used to control the hydraulic motor control swash plates 20-1 and 20-. Two
And left and right driven arms 46 and 49, which are interlockingly connected to each other, and freely engage in depth and shallowness.
Is an operation structure of the HST traveling device which is always biased to the neutral state, and therefore, regardless of the set position of the main shift operation lever for performing forward / reverse shift of the body, the turning operation tool is used for the straight running state and the left turning or right turning. The turning operation and the spin turn operation can be performed, so that the driving operation is easy.

Further, regardless of the operation position of the turning operation tool, the aircraft stops when the main transmission operation lever is set to the neutral position, so that the traveling speed of the aircraft suitable for the work can be obtained. Therefore, various operations can be performed efficiently.

Although FIGS. 4 to 6 show the embodiment in which the left and right guide arm shafts 40 and 42 are respectively deviated, they may be arranged at the center.

[0030]

According to the present invention, a pair of slide bodies are interposed between the turning operation tool and the driven arm via the main transmission shaft, and both slide bodies are used for operating the turning operation tool. It is configured to slide in conjunction with the main transmission shaft, and a pair of guide arms that rotate in conjunction with the rotation operation of the main transmission shaft are connected to each slide body, and each guide arm is driven by the driven arm. The arm is connected in an interlocking manner so as to be able to change acceleration and deceleration freely, so that the structure can be made compact, and regardless of the set position of the main transmission operation lever that performs forward / reverse shifting of the aircraft,
The turning operation tool allows a straight-ahead operation, a left-turn operation, or a right-turn operation, and a spin-turn operation, thereby facilitating the driving operation.

[Brief description of the drawings]

FIG. 1 is an overall side view of an agricultural combine equipped with the present invention.

FIG. 2 is a cross-sectional plan view of an operation unit structure in the HST traveling device according to the present invention.

FIG. 3 is a right side view of the same section.

FIG. 4 is an explanatory view of the operation of the left and right guide arms and the left and right driven arms, in which the main transmission operation lever is in a neutral position and the turning operation tool is in a neutral state (body stop).

FIG. 5 is an explanatory view of the operation, in which a main shift operation lever is shifted forward, and a turning operation tool is in a neutral state (airframe straight ahead).

FIG. 6 is an explanatory diagram of the operation, in which the main shift operation lever is shifted forward, and the turning operation tool shows a right turning state (the aircraft is turning right).

FIG. 7 is an explanatory diagram of the operation, in which the main speed change operation lever is shifted forward, and the turning operation tool shows a right spin turn state (the aircraft turns sharply to the right).

[Explanation of symbols]

 A HST traveling device 18 Turning operation tool 20-1 Right swash plate 20-2 Left swash plate 27 Left slide 30 Right slide 34 Main transmission shaft 41 Left guide arm 43 Right guide arm 46 Left driven arm 49 Right driven arm

Claims (1)

(57) [Claims] 1. An HST traveling device on each of the left and right sides of the fuselage.
(A), (A) are provided independently, and each HST traveling device
(A), (A) hydraulic motors (M), (M) the acceleration / deceleration mechanism of the driven arms (46) and ( 49 ) are linked to each other, and the turning operation tool (18)
By each follower arm (46), in the hydraulic motor (M), an operation section structure configured to can individually acceleration and deceleration operation (M) (49) each HST traveling device through the (A), (A) , Between the turning operation tool (18) and the driven arms (46), (49).
Slide bodies (27) and (30) are interposed via the main transmission shaft (34).
In addition, both slides (27), (30) are
Slide along the main transmission shaft (34) in conjunction with the operation of 8).
And each slide body (27), (30) has a main transmission shaft (34).
A pair of guide arms (41) that rotate in conjunction with the rotation operation,
(43), and each guide arm (41), (43)
Moving arm (46), (49)
The operation unit structure in the HST traveling device characterized by the following .