JPH078361Y2 - Traveling transmission in combine - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a continuously variable transmission unit incorporated in a traveling transmission system.
The present invention relates to a traveling transmission apparatus in a combine configured to perform a speed change operation with a hydraulic cylinder that expands and contracts based on switching of a solenoid valve of a control circuit.

(B) Conventional technology Recently, as a combine, a vehicle equipped with the above-described traveling transmission has come to be accepted. However, in the conventional, a combine has a transmission control circuit of a continuously variable transmission unit. , It has been independently designed.

(C) Problem to be solved by the invention With the conventional one, repair should be performed if the accident occurs in a weak field where the condition is bad, such as when the failure occurs in the speed change switch of the control circuit. I am afraid that it will be extremely difficult because I can not do it.

Therefore, in the present invention, even if the gearshift switch of the control circuit should fail in a place with bad conditions, in such a case, the continuously variable transmission is urgently operated to perform gearshift repair. The object of the present invention is to provide an improved traveling transmission that allows the combine to travel to an easy place.

(D) Means for Solving the Problems In order to achieve the above object, a traveling transmission device according to the present invention comprises a control circuit (3) for controlling a continuously variable transmission portion (13) of a traveling transmission system.
9) and a control circuit (2 for controlling the steering clutch unit (11)
In a combine equipped with 4), the continuously variable transmission section (1
The first changeover switches (43) and (44) are provided in the connecting portion between the speed increasing solenoid (40) and the deceleration solenoid (41) input side of the control circuit (39) of 3) and the speed change switch (38). The second changeover switches (46) (47) are provided between the operation section (9) and the self-operated controller (45) in the automatic steering control circuit (24), and the first and second switches are provided. The switching sides of the changeover switches (43), (44), (46) and (47) are connected to each other, and the control circuit (39) is operated by the operation of the operation section (9) so that the continuously variable transmission section (13) can be operated. The hydraulic cylinder (21) is expanded and contracted by switching the electromagnetic switching valve (42) so that the transmission ring (18) can slide.

(E) Action In the traveling transmission having the above-described configuration, when the gear shifting does not operate even if the gear shift switch in the control circuit (39) of the continuously variable transmission is operated, the control circuit of the continuously variable transmission (39) ) Is switched to the control circuit (24) side of the steering clutch unit, and the operation of the operation unit (9) of the steering clutch control circuit (24) causes the continuously variable transmission unit (13) to shift. Switch to the state that

Then, after the above switching operation, if the operating portion (9) is operated to operate the continuously variable transmission portion and the combine travels,
It is confirmed that a failure has occurred in the control circuit of the continuously variable transmission unit. In that case, the continuously operated transmission unit is continuously operated by the operation unit of the steering clutch control circuit to move the combine urgently. It is possible.

(F) Example Next, an example will be described with reference to the drawings.

The overall layout of the combine is shown in FIG.

In FIG. 3, the combine is configured as a self-propelled type that travels by a pair of left and right crawler traveling portions (not shown in the figure) disposed at the bottom of the vehicle body (1), and the combine is provided above the vehicle body (1). The threshing section (2) and the engine (3) are mounted, the operating section (5) is installed, and the cutting and conveying section (5) is provided at the front of the vehicle body so that it can be adjusted up and down. Has been done.

The pair of left and right crawler traveling units are forcibly driven by a traveling transmission system including the engine (3) and a traveling mission (6) interlocked with the engine (3). It is provided with the detailed structure shown in the transmission sectional diagram in FIG. 4, and the gear shift lever (7) and steering levers (8) in the traveling mission (6) are provided.
(8), (9), and other various operating tools are arranged in the operating section (4) so that they can be operated.

In Fig. 4, the case (10) of the steering mission (6)
A transmission mechanism including a side clutch type or side clutch / brake type steering clutch section (11) (11), front-rear switching section (12), and continuously variable transmission section (13) is housed, and a case is housed. The left and right crawler drive shafts (14, 14) supported on the lower part of (10) are forcibly driven by the above-mentioned transmission mechanism.

The continuously variable transmission unit (13) includes an input disc installed on the input shaft (15), an output disc installed on the output shaft (16), and a planet cone (17) frictionally engaged with both discs. ) And a transmission ring (18) that frictionally engages the conical surface of the planetary cone (17), etc., and is a mechanical continuously variable transmission unit, and the input shaft (15) side is the engine by a transmission (19). The output shaft (16) side is linked to the forward / reverse switching unit (12), and the opposite end of the output shaft (16) is connected to the case (1).
0) The PTO shaft (20) is extended and projected to the outside to transmit power to the cutting and transporting section (5).

Further, the speed change ring (18) of the continuously variable speed change section (13) is moved in the axial direction of the input shaft by the expansion and contraction operation of the hydraulic cylinder (21), and the displacement amount thereof can be arbitrarily selected. By doing so, the position where the speed change ring (18) frictionally engages with the conical surface of the planetary cone (17) is changed, and the power taken out to the output shaft (16) side is continuously variable.

The forward / reverse switching unit (12) has a slide gear mounted between the forward rotation gear train and the reverse rotation gear train, and when the slide gear is switched, any one of the above gear trains is brought into an interlocking state selectively. The switching of the forward / reverse switching unit (12) can be switched to the monolever system by the speed change lever (7) for expanding and contracting the hydraulic cylinder (21) for moving the speed change ring (18). (The detailed structure of the gear shift operation structure will be described later).

The hydraulic cylinder (23) that operates the steering clutch portions (11) (11) is also configured to be operated by the automatic steering control circuit (24).

That is, the steering sensor (25) provided on the side of the front end of the planting stem culm introduction path of the cutting transport unit (5) causes the lateral misalignment between the planting culm and the cutting transport unit (5). When the position shift detection signal is issued, the control circuit (24) operates to operate the hydraulic cylinder (23) to intermittently operate the steering clutch parts (11) (11), It is designed to correct the direction of the aircraft, and in addition, a control circuit for automatic steering (2
4) on the operation part (fit steering switch)
By incorporating the switch (9), it is possible to correct the direction of a narrow machine during work by switching the switch (9).

Next, details of the operation structure for operating the speed change ring (18) of the continuously variable speed change section (13) and the forward-reverse switching section (12) will be described with reference to FIGS. 1 and 2.

The speed change lever (7) is pivotally supported so as to be able to turn forward and backward and leftward and rightward about the orthogonal axis (a) (b), and is guided along a guide groove (26) formed in the speed change guide plate. The shift groove (26) is formed by connecting the forward shift portion forward from the neutral groove portion and the reverse shift portion rearward from the neutral groove.

The lower part of the speed change lever (7) has a forward / reverse switching part (12).
A switching arm (27) connected to a shifter for slidingly moving the slide gear is provided, and when the speed change lever (7) is turned to the left or right along the neutral groove portion, the forward / backward switching portion is switched.

In addition, on both left and right sides of the speed change lever (7), actuating bodies (28) and (29) are rotatably pivoted in the front-rear direction, and the respective actuating bodies (28) and (29) are connected to the speed change ring (21). Operate
Link (31) with the controller (30) of the control system for stop control
Connected by (32).

Then, when the shift lever (7) is tilted to the left side in the figure,
When the left side protrusion (33) attached to the speed change lever (7) engages with the left side operating body (28) and the speed change lever (7) is turned to the right, the right side protrusion attached to the speed change lever (7). (34)
Engages with the right side actuation body (29), and when the speed change lever (7) is turned leftward and is moved backward along the reverse speed change portion, the left side actuation body (28) is rotated. When the shift lever (7) is turned rightward and is moved forward along the forward shift groove portion, the right actuation body (29) is rotated.

The controller (30) connects the interlocking links (31) and (32) to the rotary shaft cylinder (35) that is continuously provided to the pinion portion of the substantially fan-shaped case, and the actuating bodies (28) and (29). The case is provided so as to rotate in the same direction when either of them rotates.

Further, a feedback shaft (36) that pivotally supports the rotating shaft cylinder (35) is connected to a feedback mechanism (37) connected to the expansion and contraction side of the hydraulic cylinder (21) that operates the transmission ring (18), and the case is connected to the case. A shift switch (38) is formed inside the case between the side and the feedback mechanism side.

Then, the speed change switch (38) is kept in the disconnected state when the speed change lever (7) is positioned in the neutral groove portion, and when the speed change lever (7) is stopped at an arbitrary position in the forward / reverse speed change speed groove portion, the feed bark mechanism (37). ) Is to be restored to the disconnected state.

The speed change switch (38) is incorporated in a control circuit (39) for controlling the expansion and contraction / stop of the hydraulic cylinder (21) for operating the speed change ring. When the switch (38) is in the connected state, the speed increase switch is speeded up. Solenoid (40), deceleration solenoid (4
Operate any one of 1) to switch the electromagnetic switching valve (42) of the hydraulic circuit to expand and contract the hydraulic cylinder (21),
When the switch (38) is turned off, the hydraulic circuit is set to a neutral state and the expansion / contraction operation of the hydraulic cylinder (21) is stopped.

Therefore, in the present invention, the first changeover switch (43) (at the connecting portion between the input side of the speed increasing solenoid (40) and the deceleration solenoid (41) of the control circuit (39) and the speed change switch (38) side. 44), and the operation section (fit steering switch) (9) and the self-driving controller (45) on the control circuit (24) side for automatic steering described above.
A second changeover switch (46) (47) is also provided between and, and the changeover sides of the first changeover switches (43) (44) and the second changeover switches (46) (47) are connected and connected, The operation unit (fit steering switch)
By operating the operation control circuit (39) of (9) and switching the electromagnetic switching valve (42), the hydraulic cylinder (21) is expanded and contracted to move the speed change ring (18) to enable continuously variable speed change.

(G) Effect of the Invention As described above, the traveling transmission of the present invention includes the control circuit (3) for controlling the continuously variable transmission section (13) of the traveling transmission system.
9) and a control circuit (2 for controlling the steering clutch unit (11)
In a combine equipped with 4), the continuously variable transmission section (1
The first changeover switches (43) and (44) are provided in the connecting portion between the speed increasing solenoid (40) and the deceleration solenoid (41) input side of the control circuit (39) of 3) and the speed change switch (38). The second changeover switches (46) and (47) are provided between the operation section (9) and the self-operated controller (45) in the automatic steering control circuit (24), and the first and second switches are provided. The switching sides of the changeover switches (43), (44), (46) and (47) are connected to each other, and the control circuit (39) is operated by the operation of the operation section (9) so that the continuously variable transmission section (13) can be operated. Since the speed change ring (18) is slidable by expanding and contracting the hydraulic cylinder (21) by switching the electromagnetic switching valve (42), even if the speed change switch of the control circuit (39) is operated, there is no need. Even if the gear shifting section (13) does not operate in gear shifting, at that time, the switching switch Operation of the control circuit (24) of the steering clutch section (11) by operating the control section (9) of the steering clutch section (11) so that the control circuit (39) for operating the continuously variable transmission section can be operated. Division (9)
With this operation, the continuously variable transmission can be shifted to move the machine to an urgently required place, and it is possible to avoid getting stuck.

In addition, it is possible to determine the failure of the shift switch of the shift operating unit.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a control circuit diagram to which the present invention is applied, FIG. 2 is an explanatory diagram showing an operation structure of a continuously variable transmission, and FIG. 3 is a combine to which the present invention is applied. And FIG. 4 is a transmission cross-sectional view of the traveling mission unit. (9) …… Operation part, (11) …… Steering clutch part (13) …… Stepless transmission part, (21) (22) …… Hydraulic cylinder (24) (39) …… Control circuit

Claims (1)

[Scope of utility model registration request] 1. A combine comprising a control circuit (39) for controlling a continuously variable transmission section (13) of a traveling power transmission system and a control circuit (24) for controlling a steering clutch section (11). The first changeover switches (43) (44) are provided in the connecting portion between the input side of the speed increasing solenoid (40) and the deceleration solenoid (41) of the control circuit (39) of the speed change unit (13) and the speed change switch (38). And a second changeover switch (46) (47) provided between the operation section (9) and the self-operation controller (45) in the automatic steering control circuit (24). ,
The switching sides of the second changeover switches (43), (44), (46) and (47) are connected to each other, and the control circuit (39) is operated by the operation of the operation section (9) to make the continuously variable transmission section (13). ) A hydraulic transmission (21) for a combine, wherein the hydraulic cylinder (21) is expanded / contracted by switching the electromagnetic switching valve (42) to make the speed change ring (18) slidable.