JPH0519065U - Steering hydraulic system - Google Patents

Abstract

(57) [Summary] (Corrected) [Constitution] Left and right hydraulic cylinders that operate the left and right steering side clutches to disengage the brakes, electromagnetic valves that control each cylinder, and switches (53) (54) Steering lever (1
7) is provided with an operating body for changing the stroke end of each cylinder, and the operating body is connected to the steering lever (17) via a single brake wire (45). It is a thing. [Effect] The number of wires (45) connected to the steering lever (17) can be reduced from two in the past to one, and the steering operation structure is simplified and the assembly and adjustment workability is improved as compared with the conventional one. Etc. can be easily performed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a steering hydraulic system for controlling side clutches and brakes installed in a mission such as a combine.

[0002]

[Prior Art]

 Conventionally, there was a technology to provide a left and right hydraulic cylinder for disengaging the left and right side clutches of a combine mission, and selectively operate each of the cylinders via a hydraulic valve by operating a steering lever to change the traveling course. ..

[0003]

[Problems to be solved by the device]

 In the prior art, since two left and right wires are connected to the steering lever to perform a left or right turning operation, two sets of hydraulic cylinder operation systems to be connected to the steering lever are required. However, there was a problem that it was not possible to easily simplify the process and improve the workability of assembly and adjustment.

[0004]

[Means for Solving the Problems]

 Therefore, the present invention has left and right hydraulic cylinders that operate the left and right steering side clutches to disengage the brakes, electromagnetic valves that control each cylinder, and a steering lever that operates the electromagnetic valves via switches. In the steering hydraulic device provided, an operating body for changing the stroke end of each of the cylinders is provided, and the operating body is connected to the steering lever via a single brake wire. The number of wires to be connected to the steering lever can be reduced from two in the past to one, so that the steering operation structure can be simplified and the assembly and adjustment workability can be easily improved as compared with the conventional one. ..

[0005]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory view of a main part, FIG. 2 is a side view of the combine, and FIG. 3 is a plan view of the combine. A machine stand installed on the frame (1), (4) a threshing section in which the feed chain (5) is stretched on the left side and the handling cylinder (6) is built in, (7) is a cutting blade (8) and a grain A mowing unit having a culm transport mechanism, (9) is an straw processing unit that faces the end of the straw chain (10), (11) is a driver's cab having a driver's seat (12) and an operating unit (13), (14) is an engine part which is arranged at the rear of the driver's seat (12) and internally has an engine (15), and (16) is arranged at the rear side of the engine part (14) and is a grain from the threshing part (4). It is a grain tank that stores grains, such as a steering lever (17) and a traveling speed change lever (18). Provided 3), it is configured to perform harvesting to threshing continuously harvests culms.

Further, the left and right traveling crawlers (2) and (2) are equipped with a mission (19), and as shown in FIG. 4, a shift output shaft (20) for shifting the output of the engine (15) is transmitted. The left and right side clutches (24) and (24) are freely disengageable between the gear (21) and the gears (23) and (23) of the axles (22) and (22) of the crawlers (2) and (2). The left and right side brakes (25) and (25) are arranged coaxially with the side clutches (24) and (24).

Then, the clutch shifters (26) (27) are engaged and connected to the side clutches (24) (24), and the piston rods of the hydraulic cylinders (28) (29) are connected to the respective clutch shifters (26) (27). (30) (30) are connected, and the clutch shifters (26) and (27) are operated by controlling the hydraulic cylinders (28) and (29) to disengage the side clutch (24) and to apply the brake (25). Is configured.

Further, as shown in FIG. 5, a hydraulic pump (33) driven by the engine (15) is provided with a three-position four-port electromagnetic valve (32) having left and right solenoids (31) (31). The hydraulic cylinders (28) and (29) are connected via the valve (32), and the solenoids (31) and (31) are selectively actuated by the steering lever (17) to operate the cylinders (28) and (29). It is configured to turn left and right by an alternative operation. The return springs (34) (35) are urged to the piston rods (30) (30) and the stroke end adjusting rods (36) (36) are urged. And throttle valves (37) and (37) are provided on each of the cylinders (28) and (29), and when the electromagnetic valve (32) is switched, the piston rod (30) is made to protrude part way to the side. By disengaging the clutch (24) and pushing the rod (36) to open the throttle valve (37), the stroke end of the piston rod (30) is changed in proportion to the opening degree of the throttle valve (37). The piston rod (30) is further projected so that the brake (25) is turned on so that the brake (25) force proportional to the opening of the throttle valve (37) can be obtained.

Further, as shown in FIGS. 6 and 7, each cylinder (28) (29) is provided in a cylinder block (38), and the block (38) is attached to a mission (19) and a bracket (39) is attached. And the piston rod (30) end of the length adjusting bolt (40) is brought into contact with the clutch shifter (26) (27), and the stroke end of each cylinder (28) (29) is fixed. An arm plate (41), which is an operation body for changing the rotation angle, is rotatably supported by the bracket (39) via a support shaft (42), and the arm plate (41) is attached to each cylinder (28) (29). Stroke end adjustment The rods (36) and (36) are brought into contact with each other, and the arm plates (41) move the rods (36) and (36) in and out at substantially the same time. The outer wire (43) and the inner wire (43) 44) is provided with one brake wire (45), one end of the outer wire (43) is connected to the bracket (39) through the outer bridge (46), and the link (47) of the support shaft (42) is provided. The inner wire (44) is connected to the inner wire (44), and the arm plate (41) is swung by moving the inner wire (44) in and out to move the rods (36) and (36) in and out to advance the piston rods (30) and (30). It is configured to change the end.

Further, as shown in FIG. 1, the cam lever (50) is rotatably supported inside the operation column (48) of the driving operation section (13) via a fulcrum shaft (49), and the cam lever (50) is rotatably supported. The steering lever (17) is connected to the steering lever (17) via the lever bracket (51), the cam lever (50) is swung in conjunction with the steering lever (17), and the cam lever (50) and the steering lever (17) ) Is provided in a neutral position, and a left / right turning switch (53) (54) for selectively turning on the cam lever (50) by swinging the cam lever (50) is provided. (54) is electrically connected to each of the solenoids (31) and (31), and the cam lever (50) is moved by tilting the steering lever (17) left and right. Swing left and right, selectively turn on each of the switches (53) (54) to energize one of the solenoids (31) (31), and switch the electromagnetic valve (32) to switch each hydraulic cylinder. One of (28) and (29) is operated to disengage one of the left and right side clutches (24) and (24) to change the traveling course to the left or right.

The left and right swivel arms (55) and (56) are supported on the fulcrum shaft (49) as idle shafts, and the outer wire (43) end of the brake wire (45) is moved to the left swivel arm (55). The inner wire (44) is connected and fixed to the right swivel arm (56) through the shaft body (58), and the outer wire (57) and the shaft are connected to each other. A return spring (59) is connected between the body (58), and the revolving arms (55) (56) are supported by abutting against the operation pin (60) of the cam lever (50) by the pulling force of the spring (59). Then, the arm plate (41) is connected to the steering lever (17) through a break wire (45).

Then, as also shown in FIG. 8, a stopper (61) fixed to the operation column (48) is loosely fitted in the long hole (62) of the cam lever (50), and the left and right turning arms (55) (56). When the front end of the stopper (61) is projected between the steering lever (17) and one of the switches (53) (54) is turned on via the cam lever (50) by operating the steering lever (17), the steering lever (17) By further tilting in the same direction, one of the arms (55) (56) is swung by the pin (60) of the cam lever (50), and the outer wire (43) is retracted or the inner wire (44) is advanced. , Swinging the arm plate (41) to push in the stroke end adjusting rods (36) (36), and the pistons of the hydraulic cylinders (28) (29). The stroke end of the rods (30) (30) is changed, the side brake (25) on the side with the side clutch (24) disengaged is turned on, and it is configured to turn left or right. There is.

As is apparent from the above, the steering lever (17) is supported at the neutral position (A) by the neutral return spring (52), and the steering lever (17) moves the left and right course changing positions (B) (C). Turn the turning switches (53) (54) to turn on the side clutch (24) to correct the traveling course and tilt the steering lever (17) to the left and right turning positions (D) (E). By this, the advancing stroke end of the hydraulic cylinders (28) (29) is changed, and the side brake (25) on the side where the side clutch (24) is disengaged is operated to brake the traveling crawler (2). Between the neutral position (A) and the course changing position (B) (C) is a dead zone, and when the steering ring (17) is in the course changing position (B) (C), the turning switch (53 ) (54) is turned on, the switches (53) and (54) are kept on at the course changing positions (B) and (C) to the turning positions (D) and (E), and the course changing positions (B) ( From C) to the turning position (D) (E), the advancing stroke end of the hydraulic cylinders (28) (29) is changed in proportion to the tilting operation angle of the steering lever (17) to change the steering lever (17). A braking force that increases in proportion to the increase in the inclination is generated in the side brake (25), and the traveling crawler (2) is braked by the braking force that is proportional to the tilt angle of the steering lever (17). Is configured to change direction with a desired turning radius.

[0014]

[Effect of the device]

 As is apparent from the above-described embodiments, the present invention includes left and right hydraulic cylinders (28) and (29) for disengaging the left and right steering side clutches (24) (24) to turn on the brake (25), and A steering hydraulic system provided with an electromagnetic valve (32) for controlling a cylinder (28) (29) and a steering lever (17) for operating the electromagnetic valve (32) via switches (53) (54), An operating body (41) for changing the stroke end of each cylinder (28) (29) is provided, and the operating body (41) is connected to the steering lever (17) via a single brake wire (45). The number of wires (45) to be connected to the steering lever (17) can be reduced from two in the past to one in comparison with the conventional one, and the steering operation structure can be simplified. Those which can easily perform that such improvement of the assembling adjustment workability.

[Brief description of drawings]

FIG. 1 is an explanatory view of mounting a steering lever.

FIG. 2 is a side view of the combine.

FIG. 3 is a plan view of the same.

FIG. 4 is an explanatory diagram of a mission.

FIG. 5 is a hydraulic circuit diagram.

FIG. 6 is a side view of a hydraulic cylinder mounting portion.

FIG. 7 is a plan view of the same.

FIG. 8 is a partial explanatory diagram of FIG.

[Explanation of symbols]

 (17) Steering lever (24) Side clutch (25) Side brake (28) (29) Hydraulic cylinder (32) Electromagnetic valve (41) Arm plate (operator) (45) Brake wire (53) (54) Swing switch

Claims (1)

[Scope of utility model registration request] 1. A steering system comprising: a left and right hydraulic cylinder that disengages a steering left and right side clutch to apply a brake; an electromagnetic valve that controls each cylinder; and a steering lever that operates the electromagnetic valve via a switch. The steering hydraulic system is characterized in that an operating body for changing the stroke end of each cylinder is provided, and the operating body is connected to the steering lever via a single brake wire.