JPH0429321B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lifting lock device for a reaping section in a combine harvester.

Conventionally, a dedicated lock operating device was required to lock the raising and lowering of the reaping section.

The present invention aims to improve the safety of maintenance work and simplify the operability by automatically locking the raising and lowering of the reaping section in conjunction with the operation of the parking brake.

For this reason, the present invention has the following technical means. That is, the parking brake locking device 6 is configured such that the parking axle brake is activated and locked only when the left and right operation levers 2, 2, which brake the left and right traveling devices 4, 4 separately, are operated at the same time, and the parking brake locking device 6 is configured such that the parking axle brake is activated and locked. The reaping section 12 is equipped with a reaping section elevating lock device 14 configured to lock the elevating operation of the reaping section 12, and the elevating lock device 14 of the reaping section 12 is automatically activated due to simultaneous operation of the left and right steering levers 2, 2. A reaping section elevating and lowering lock device for a combine harvester is characterized in that the reaping section elevating and lowering locking device for a combine harvester is interlocked to operate and lock the reaping section automatically.

With this configuration, the present invention has the following effects. In other words, if the parking brake is applied by simultaneously operating the left and right steering levers, the reaping section lift lock device will automatically operate and lock the reaping section in a state where it cannot be raised or lowered, so it is impossible to accidentally turn the reaping section lift lever. Since the reaping section does not go up or down even when operated, the safety of maintenance work can be ensured.Moreover, conventionally, locking the parking brake and raising/lowering the reaping section had to be operated separately. Although it was complicated, according to the present invention, both lock operations can be performed with a single touch.
Since you do not forget to operate each lock, the safety of maintenance work is further improved, and operability is simplified.
It has the characteristic of being able to perform maintenance work quickly.

An embodiment of the present invention will be explained below based on the drawings.

Reference numeral 1 designates a driving operation box, and this driving operation box is provided with a pair of left and right operating levers 2, 2, which are used to disengage the driving clutches of the left and right traveling devices 4, 4. The rotary arms 3, 3 are connected to the traveling clutch and brake device via wires 5, so that each brake can be actuated, and by operating each brake independently, the direction of movement of the aircraft can be controlled.

Reference numeral 6 denotes a parking brake locking device, which is provided at a position relative to the movement locus of the rotating arms 3, 3 which can be rotated by the swinging operation of the steering levers 2, 2;
A brake lock plate 8 is provided which is biased by a spring 7 so that the upper end side can swing toward the rotating arms 3, 3 side around a pivot point P at the lower end, and further includes a brake lock plate 8 which is biased by a spring 7. , 2 are simultaneously operated to the braking position.
A brake lock pin 9 provided at an appropriate location engages with a locking portion 10 formed on the brake lock plate 8 and is locked.

Reference numeral 11 denotes a reaping lifting lever, which is disposed near the operating levers 2, 2 in the operating box 1, and is operated by swinging back and forth.
are configured to be interlocked so that they can be raised and lowered via a hydraulic cylinder 13.

Reference numeral 14 denotes a lifting lock device for the reaping section, which includes a reaping lock plate 15 and a reaping lock pin 16 provided on the rotating arm 11a of the reaping lifting lever 11, and the reaping lock plate 15 is connected to the brake lock. It is integrally attached to the plate 8, and similarly to the brake lock plate 8, the upper end is the rotating arm 1 of the reaping lift lever 11 about the pivot point P on the lower end.
1a side, and only when the left and right steering levers 2, 2 are simultaneously operated to the braking position, the reaping lock plate 15 is oscillated and the reaping lock plate 15 is oscillated. The locking portion 17 is configured to engage and lock the reaping lock pin 16 of the rotating arm 11a.

In the embodiment, the reaping lift lever 11 is configured to lock only when operated in the downward direction, but if the locking portion 17 of the reaping lock plate 15 is made into a concave shape, it can also be locked in the upward direction. It is possible to have a lockable configuration.

Only when the left and right steering levers 2, 2 are simultaneously operated to the braking position, the brake lock pins 9 of the rotating arms 3, 3 engage the locking portion 1 of the brake lock plate 8.
0 and is locked, maintaining the parking brake in the locked state. If only one steering lever 2 is operated, the brake lock pin 9 of one of the rotating arms 3, 3 will always be in contact with the opposing surface of the brake lock plate 8, so the brake lock pin 9 of the other cannot engage with the locking part 10 and will not be locked.

Also in the reaping lift lever 11, only when the left and right steering levers 2, 2 are simultaneously operated to the braking position, the reaping lock plate 15 is swung and biased toward the rotating arm 11a of the lift lever 11, and the locking portion 17 is
As a result, the reaping lift lever 11 is prevented from moving in the lowering direction of the reaping section 12 which is in the raised position, so that the reaping lever 11 is prevented from moving in the lowering direction during maintenance work. Even if the reaping lift lever is operated, the reaping section 12 does not descend, so it is safe.

To release the locking of the parking brake and the lifting lock of the reaping section, grasp either the brake lock plate 8 or the reaping lock plate 15 and push against the spring 7 in the direction of arrow A from the state shown in FIG. Then, the brake lock plate 8
The engagement of the brake lock pin 9 with the reaping lock plate 15 and the engagement of the reaping lock pin 16 with the reaping lock plate 15 are simultaneously disengaged, and the steering levers 2, 2 return to the original brake release device as shown in FIG. The elevating lever 11 is also released so that the reaping section can be freely raised and lowered.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a side view of the combine harvester, FIG. 2 is a plan view of the main parts thereof, and FIGS. 3 and 4 are side views showing the operating state. 1 is an operation box, 2 and 2 are steering levers, 4 is a traveling device, 6 is a parking brake lock device, 11 is a reaping lifting lever, 12 is a reaping section, and 14 is a reaping section lifting lock device.

Claims (1)

[Claims] 1 A parking brake locking device configured so that the parking brake is activated and locked only when the left and right steering levers, which brake the left and right traveling devices separately, are operated simultaneously, and a parking brake locking device that locks the raising and lowering operation of the mowing section that can be raised and lowered. and a reaping section elevating/lowering lock device configured as shown in FIG. A locking device for lifting and lowering the reaping section of a combine harvester.