JPS633556Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The disclosed technology belongs to the technical field of clutch levers that operate the steering of combine harvesters.

Therefore, this invention is attached to the transmission casing of a self-propelled agricultural machine such as a combine harvester, and a clutch arm that contacts the piston of a hydraulic cylinder connected to a hydraulic clutch has one end pivoted to the transmission casing by a pin. The arm is pivotally connected to the other end and is rotatable via a cable linked to an operating lever, so that the pivoting of the arm conducts pressure oil from the hydraulic cylinder to the hydraulic clutch. This invention relates to a clutch lever structure, in particular, the operating lever is connected to the clutch arm via an outer cable by a ring bracket at its tip, while an inner cable inserted through the outer cable has one end connected to the control frame. The other end extends downward from the clutch arm and is tensioned by being latched in tension to a bracket of the transmission casing, and the outer cable slides on the inner cable as a guide. This invention concerns a steering clutch lever structure for a self-propelled agricultural machine.

<Prior Art> As is well known, as shown in FIG. 1, when controlling the steering of a combine harvester 1 as a self-propelled agricultural machine,
When one of the pair of left and right operating levers 3, 3' installed on the control frame 2 installed on the side of the front of the aircraft is operated, the inner cables 5, 5' are pulled by the turning movement, and the tension is transferred to the outer cable. There are steering clutch levers 9, 9' which are guided by cables 6, 6' and adapted to pivot upwardly clutch arms 8, 8' which are pin-mounted on the transmission casing 7.

As a result, hydraulic cylinders 10 and 1 attached to the transmission casing 7 and in contact with the lower surfaces of the clutch arms 8 and 8', respectively,
0' pistons 11, 11' are protruded in conjunction with the pivoting movement of the clutch arms 8, 8'.

During this time, the pressure oil supplied to the hydraulic cylinders 10, 10' is transferred to the oil tank 12, as shown in FIG.
A hydraulic motor 14 rotating with an engine 13 as a driving source causes pressurized oil to flow into the transmission casing 7 through a diverter valve 15, and when the pistons 11 and 11' are projected and slid, the pressurized oil flows into the transmission casing 7. Hydraulic clutches 16, 16' provided
1, then disconnect the clutch and release one crawler 1.
An embodiment has been adopted in which the rotary drive of the aircraft 7 and 17' is stopped and the aircraft is turned.

<Problems to be solved by the invention> However, as described above, the steering clutch levers 9, 9' perform steering control by pulling the inner cables 5, 5', so the outer cables 6, 6' are connected to the transmission casing. Bracket 18 that hangs on the 7 side
must be provided above the clutch arms 8, 8', so that the bracket 18 and the operating levers 3, 3' are close to each other, and as far as this is concerned, the assembly of the rigid outer cables 6, 6' is easy. The work was extremely difficult, especially since there was a narrow space around the transmission casing 7, which significantly reduced work efficiency, and the cables were difficult to operate.

On the other hand, the clutch arms 8, 8' are attached oppositely to each other, and therefore, in a narrow space, the distance between the pivot pin and the other end is short, and the control response stroke for the hydraulic cylinders 10, 10' is accordingly reduced. The inconvenience was that the adjustments could not be made minutely, and that skill was required to operate the so-called half-clutch.

<Purpose of the invention> The purpose of this invention is to solve the problems of the steering clutch lever structure of self-propelled agricultural machinery based on the above-mentioned conventional technology, and to solve not only the assembly work efficiently but also the operability. It is an object of the present invention to provide an excellent clutch lever structure that can be improved and is beneficial to the field of agricultural machinery utilization in the agricultural industry.

<Means and actions for solving the problem> The configuration of this invention in accordance with the above-mentioned purpose is to operate one of the pair of left and right operation levers provided on the control frame of the self-propelled agricultural machine in order to solve the above-mentioned problem. When performing steering control, the rotation of the operation lever presses the outer cable, one end of which is fixed to the ring bracket at the lower end, and the pressing force is applied to the clutch arm attached to the other end of the outer cable. The clutch arm is rotated around a pin pivotally supported on the transmission casing, and the piston of the clutch hydraulic cylinder that comes into contact with the clutch arm is caused to follow and protrude, thereby reducing the pressure flowing into the hydraulic cylinder. The oil is transmitted to one of the left and right steering clutches, and the outer cable is inserted through the outer cable and has one end attached to the control frame and the other end attached to the transmission casing below the clutch arm. The pair of clutch arms are arranged to correspond to the pair of operating levers, and are configured to slide while being guided by inner cables that are each hooked in a tensioned state to a bracket. The gist of this invention is to provide a technical means for turning the pins in a three-dimensionally intersecting state and pivotally supported.

<Embodiment> Next, one embodiment of this invention will be described below with reference to FIGS. 1 and 2 and the drawings from FIG. 3 onwards.

19, 19' are the left (right) that form the gist of this idea.
Hydraulic cylinders 10, 10' for the steering clutch attached to the transmission casing 7 installed on the combine 1 as a self-propelled agricultural machine and the control frame 2 installed on the front side of the machine. A pair of operating levers 20, 20' are linked.

The left and right steering clutch levers 19 and 19' are the same in form, so hereinafter the left steering clutch lever 1 will be referred to as the left steering clutch lever 1.
Only 9 will be explained.

As shown in FIG. 4, the operating lever 20 is rotatably supported at its midpoint by a pin 21 from the control frame 2, and an arm 22 integrally formed at its lower end is It extends rearward perpendicularly to the pin 21, and has a ring bracket 22' fixed to its tip.

The other end of the outer cable 23, one end of which is attached to the ring bracket 22', is attached to the distal end 26 of a clutch arm 25 whose base 24 is pivotally supported by a pin on the transmission casing 7. .

Note that the outer cable 23 has sufficient rigidity.

On the other hand, the inner cable 27 inserted into the outer cable 23 is exposed from both ends of the outer cable 23, one end of which is hooked to the control frame 2 via a stopper pin 27', and the other end of which is attached to the transmission casing. It is also hooked under tension to a bracket 28 fixedly attached to 7 via a stopper pin 27'.

The clutch arm 25 extends so that its pivot point, that is, the base 24 intersects three-dimensionally with the base 30 of the right steering clutch arm 29, and the above-mentioned first, A piston 11 of a hydraulic cylinder 10 similar to that shown in FIG. 2 is in contact with the piston 11, and the other end of a release spring 31, which has one end hooked to the transmission casing 7, is hooked.

In the above configuration, in order to assemble the steering clutch lever 19, first, both ends of the inner cable 27 that covers the outer cable 23 are attached to the control frame 2.
and a bracket 28 attached to the mission casing 7, and then one end of the outer cable 23 is hooked onto the ring bracket 2 of the operating lever 20.
2', and the other end is connected to the tip 26 of the clutch arm 25 provided at the upper part of the bracket 28.

At that time, even if the outer cable 23 has rigidity, the other end is connected to the tip 26 of the clutch arm 25.
Since it is attached to the base, the downward extension distance is longer than that of conventional assembly, and it does not have to be forced to bend.

When the combine harvester 1 to which the steering clutch lever 19 is assembled is turned to the left during reaping work, the left operating lever 20 installed upright on the control frame 2 is tilted toward you, and the operating lever 20 is pinned. A ring bracket 22' at the end of the arm 22, which pivots around the outer cable 21 and extends rearward from the lower end, presses against the outer cable 23.

Then, the outer cable 23 slides while being guided by the inserted inner cable 27 due to its rigidity, and presses and rotates the clutch arm 25, whose base end 24 is supported by a pin on the transmission casing 7, against the release spring 31. make it move.

As a result, the piston 11 of the hydraulic cylinder 10 which is in contact with the upper surface of the clutch arm 25 follows and protrudes, causing the hydraulic clutch 16 similar to that shown in FIG.
Supply pressure oil to the clutch, disengage the clutch, and crawler 1
The transmission of driving force to 7 is stopped.

During this period, the stroke of the piston 11 causes the clutch arm 25 to shift to the right steering clutch arm 2.
9, the span is longer than the angle of inclination of the operating lever 20, and therefore manual operation control, ie, half-clutch operation, etc., can be easily performed.

In this way, the combine 1 with the left crawler 17 in a non-driven state turns to the left.

Then, when the operating lever 20 is returned to a desired turning angle, the clutch arm 25 is returned to its original position by the release spring 31, and the piston 11 is accordingly moved back, cutting off the supply of pressure oil to the hydraulic clutch 16. , to manipulate the aircraft attitude.

It goes without saying that the embodiment of this invention is not limited to the above embodiment; for example, a cushion spring may be interposed in the outer cable to smoothly respond to the rotation of the clutch arm. Various aspects such as the above can be adopted.

<Effects of the invention> As mentioned above, according to this invention, in the steering clutch lever structure of a self-propelled agricultural machine, the clutch arm whose one end is pivoted to the ring bracket at the tip of the operating lever provided on the control frame and the transmission casing. The other end is connected to the other end by an outer cable through which the inner cable is inserted, and the inner cable is latched under tension to the control frame and a bracket provided on the transmission casing below the clutch arm, By making the steering control possible through the linked operation of the outer cable,
Basically, the assembly distance of the outer cable is increased, and as long as the distance is extended, the wiring can be done straight without being forced to bend, and the assembly work can be performed efficiently, which is an excellent effect.

Therefore, there is no need for extra wiring compared to the conventional method, which not only has the effect of simplifying the structure, but also allows for compact storage without interference with surrounding components even in a narrow space. The effect is also produced.

Therefore, since the wiring is straight and there are no extra turns,
It has the advantage that pressure transmission is accomplished efficiently without loss.

Since the operating lever is connected to the tip of the clutch arm via the outer cable by a ring bracket at its tip, it can be operated by sliding smoothly against the inner cable that is inserted while the outer cable is being pulled. This has the effect of reliably transmitting force to the clutch arm.

As described above, the inner wire is stretched in tension between both ends, which provides the excellent effect of facilitating smooth vertical movement of not only the outer cable but also the clutch arm.

By doing this, even if the self-propelled agricultural machine is subject to large swings or vibrations in the field, the operation of the operating lever can be more reliably transmitted to the clutch arm when operating the clutch during work. This is an excellent effect.

[Brief explanation of drawings]

Fig. 1 is a schematic explanatory diagram of the main parts of a self-propelled agricultural machine based on the prior art, Fig. 2 is an explanatory diagram of the hydraulic circuit, Fig. 3 and the following are explanatory diagrams of one embodiment of this invention. A schematic explanatory diagram and FIG. 4 are explanatory diagrams of main parts of the embodiment. 1... Self-propelled agricultural machine, 7... Mission casing, 10... Hydraulic cylinder, 11... Piston,
25...Clutch arm, 2...Control frame,
20...Operation lever, 19...Steering clutch lever,
23... Outer cable, 27... Inner cable, 28... Bracket.

Claims (1)

[Scope of utility model registration request] A clutch arm is attached to a piston of a hydraulic cylinder for a clutch attached to a transmission casing of a self-propelled agricultural machine, and one end of the clutch arm is pivotally supported by the transmission casing, and the other end of the clutch arm is connected to a control frame via a cable to an operating lever. In the steering clutch lever structure, the operating lever, which is supported by a pin on the control frame, and the clutch arm are connected to the operating lever via an outer cable by a ring bracket integrated with the operating lever. The self-propelled agricultural machine is characterized in that one end of the inserted inner cable is latched to the control frame and the other end is latched in tension to a bracket provided on the transmission casing below the clutch arm. steering clutch lever structure.