GB2073569A

GB2073569A - Combine harvester discharge pipe

Info

Publication number: GB2073569A
Application number: GB8111022A
Authority: GB
Original assignee: Kloeckner Humboldt Deutz AG
Current assignee: Kloeckner Humboldt Deutz AG
Priority date: 1980-04-09
Filing date: 1981-04-08
Publication date: 1981-10-21
Also published as: FR2480070B1; DE3013671A1; IT1146016B; BE888330A; PL230553A1; GB2073569B; FR2480070A1; IT8112492A0; PL126881B1; YU81881A

Abstract

In a combine harvester having a discharge pipe which houses a worm-type conveyor (4) and which swings from a transport position lying against the side of the harvester to a working position extending outwards from the harvester, there is provided a mechanism for driving the conveyor (4) in the discharge pipe (2) through a corresponding driven conveyor (6) in the grain tank, and a mechanism including a lever (14) that is rocked by movement of the discharge pipe (2) to block actuation of a control (18, 19) for rendering operative the conveyor-driving mechanism until the pipe (2) is fully in the working position. <IMAGE>

Description

SPECIFICATION Combine harvester The invention relates to a combine harvester hav ing a discharge pipe which is pivotable between a transport position against the sidewall of the com bine harvester and a transversely-protruding work ing position, and which pipe contains a discharge worm couplable to and drivable with a worm conveyor in a grain tank of the harvester, and having a safety device allowing the drive to the conveyors to be engaged by an actuating mechanism only when the discharge pipe is in the working position.

The invention provides in a combine harvester of the above described kind a simple arrangement whereby undesired or untimely connection of the drive to the worm conveyors is avoided and thus danger of damage to delicate combine harvester elements is minimised.

According to the invention, in a combine harvester as above set forth the actuating mechanism for the conveyor drive is formed by a linkage or draw cables and the safety device comprises a blocking member moved by the discharge pipe and arranged (a) to extend into the path of a stop face in the mechanism and prevent engagement of the worm conveyor drive when the discharge pipe is in the transport position and (b) to free the actuating mechanism when the discharge pipe is fully pivoted-out to the working position.

With this arrangement, the conveyor drive is connected only when the discharge pipe is fully swung out into the working position. When this position of the discharge pipe is reached, the worm conveyors are properly coupled together and therefore damage to the pivot joint or the coupling elements is effectivelyavoided. Moreover the danger is avoided of premature actuation of the control lever by oversight of the driver before the discharge pipe is swung out and thus of premature discharge of harvested material.

According to an advantageous feature, the blocking member is a lever which is pivotable into and out of the path of the stop face of the actuating mechanism, there being a spring acting in a sense to urge the lever into the path of the stop face, and the discharge pipe being arranged to move the lever against the action of the spring. Conveniently, the lever has two arms, one of which arms can extend into the path of the stop face and the other of which arms lies in the path of a finger carried by the discharge pipe whereby as the discharge pipe whereby as the discharge pipe swings into the working position the lever is rocked to move the one arm clear of the stop face. The finger preferably extends radially away from the pivot axis of the discharge pipe. Thus it is possible to dispense with expensive transmission members.

In practical embodiments, the pivot of the lever forming the blocking member may be displaceable to permit compensation for manufacturing tolerances.

In one particular embodiment, the actuating mechanism comprises a lever to which a pair of cables are connected, one leading to a drive for the conveyors to render the drive operative and inoperative and the other cable leading in the opposite direction to an actuating lever or the like, the stop face being on the lever to which the cables are connected.

Further details, advantages and features of the invention appear from the following description and the drawings to which reference should be made for all details not described in the text and wherein Fig. 1 is a perspective view of a combine harvester with a discharge pipe in the "transport" position, Fig. 2 is a view of the combine harvester with the discharge pipe swung out into the working position, Fig. 3 is a diagrammatic view showing details, and Fig. 4 is a perspective view showing the pivotal mounting of the discharge pipe and showing the blocking member.

Referring to the drawings, the combine harvester 1 illustrated comprises a discharge pipe 2 which can be swung between a "transport" position resting against the side wall of the combine harvester (Fig.

1) and a transversely-protruding working position (Fig. 2) for example by means of a pivot device 3 shown as an hydraulic device. From Figs. 3 and 4 it can be seen that the discharge pipe 2 contains a discharge worm-type conveyor 4 couplable with a worm conveyor 6 mounted in the grain tank 5 by a coupling device 7 illustrated diagrammatically in Fig.

3. It may further be seen that the combine harvester comprises for driving the conveyors 4 and 6 intermediate transmission gearing 8 following a driving motor (not illustrated) and a belt-tensioner pulley 9.

If a drive belt 10 is loaded through the belt-tensioner pulley 9, the discharge conveyor4 and the conveyor 6 are driven through the V-belt drive wheels 11 and 12. The engagement of this drive can be prevented with the aid of a safety device 13. This comprises a blocking member, preferably in the form of a twoarmed lever 14 which is mounted to pivot about the approximately horizontal axis 15 of a pivot joint. A spring 16 (Fig. 4) acts on and tends to load the lever 14 so that its one arm 14' extends into the path of a stop face 17 as part of an actuating mechanism 18 for moving the belt-tensioner pulley 9, which mechanism is actuated by a lever positioned adjacent the driver's seat of the combine harvester.This actuating mechanism 18 may be formed by a linkage or draw cables, and is shown (Figs. 3 and 4) as comprising two draw cable sections 18' and 18" which are connected with one another by a pivoted lever 19. This lever 19 comprises the stop face 17.

It can further be seen from Fig. 4 that an approxi mately vertical pivot spindle 20, provided laterally on the discharge pipe 2, has a radially outwardly extending finger 21. The other arm 14" of the lever 14 is associated with this finger in such a way that when the discharge pipe 2 is moved into the working position, (Fig. 4) the finger 21 engages the lever 14 and moves it counter-clockwise so that the arm 14' is moved against the stress of the spring 16 out of the path of the stop face 17. When the discharge pipe 2 is swung about spindle 20 in the direction of the arrow 22 to the transport position, the finger 21 frees the lever 14 so that the latter is moved by spring 16 to bring its arm 14' into the path of the stop face 17. If the driver of the combine harvester seeks to engage the worm conveyor drive when the discharge pipe 2 is not fully in the working position, the application of tensioner pulley 9 through the actuating mechanism 18 on to the belt drive 8 is effectively prevented by the lever 14 being in the path of lever 19.

If desired, the pivot joint 15 of the pivot lever 14 can be formed for displacement transversely of its axis forthe compensation of manufacturing tolerances.

Of course the arrangement in combine harvesters in accordance with the invention is usable with success not only in combine harvesters. Rather it is usable everywhere where the important point is the same advantages by reason of analogous use of the drive-locking principle as explained.

Claims

1. Combine harvester having a discharge pipe pivotable between a transport position against the sidewall ofthe harvester and a transverselyprotruding working position, which discharge pipe contains a discharge worm conveyor couplable to and drivable with a worm conveyor in a grain tank of the harvester, and having a safety device allowing the drive to the conveyors to be engaged by an actuating mechanism only when the discharge pipe is in the working position, which actuating mechanism is formed by a linkage or draw cables and the safety device comprises a blocking member moved by the discharge pipe and arranged (a) to extend into the path of a stop face in the mechanism and prevent engagement of the worm conveyor drive when the discharge pipe is in the transport position, and (b) to free the actuating mechanism when the discharge pipe is fully pivoted-out to the working position.

2. Combine harvester according to claim 1, wherein the blocking member is a lever which is pivotable into and out of the path of the stop face of the actuating mechanism, there being a spring acting in a sense to urge the lever into the path of the stop face, and the discharge pipe being arranged to move the lever against the action of the spring.

3. Combine harvester according to claim 2, wherein the lever has two arms, one of which arms can extend into the path of the stop face and the other of which arms lies in the path of a finger carried by the discharge pipe whereby as the discharge pipe swings into the working position the lever is rocked to move the one arm clear ofthe stop face.

4. Combine harvester according to claim 3, wherein the finger extends radially away from the pivot axis of the discharge pipe.

5. Combine harvester according to claim 2 or claim 3 or claim 4 wherein the pivot of the lever is displaceable to permit compensation for manufacturing tolerances.

6. Combine harvester according to any of claims 1 to 5, wherein the actuating mechanism comprises a lever to which a pair of cables are connected, one leading to a drive for the conveyors to render the drive operative and inoperative and the other cable leading in the opposite direction to an actuating lever orthe like, the stop face being on the lever to which the cables are connected.

7. A combine harvestersubstantiallyas hereinbefore described with reference to and as illustrated in the accopanying drawings.