DE102016223843A1 - Device for fixedly connecting a hub of a propeller shaft to a power take-off PTO - Google Patents

Abstract

The invention relates to a device for fixedly connecting a hub of a propeller shaft with a power take-off PTO shaft 1 of a motor vehicle, wherein the hub has a recess centered on the axis of rotation 1 with the PTO shaft 1, with which the hub positively on the PTO. 1 is receivable. The hub and the power take-off shaft 1 are provided with means for torque transmission which extend parallel to the axis of rotation 4 and engage in a form-fitting manner. A pivot drive device can be coupled to the power take-off shaft 1 and decoupled from the power take-off shaft 1 and the power take-off shaft 1 can be driven in a pivotable manner by the swivel drive device about its axis of rotation 4 when the swivel drive device is coupled.

Description

The invention relates to a device for fixedly connecting a hub of a propeller shaft with a PTO of a motor vehicle forming a PTO, wherein the hub has a centered on the axis of rotation common with the PTO shaft, with which the hub is positively received on the PTO and the Hub and the PTO are provided with parallel to the axis of rotation extending, positively interlocking means for torque transmission.

In such a known device, the power take-off shaft is a splined shaft profile and the hub of the propeller shaft has a corresponding receiving recess for receiving the power take-off shaft. Such devices are often used in agricultural machinery, especially in tractors, by the drive machine for the drive in the power take-off auxiliary equipment can be driven.

To connect the PTO shaft with the PTO, the usually heavy PTO shaft must be manually raised and pushed with its receiving recess on the PTO. In addition, the PTO shaft by hand must be pivoted so far around its axis of rotation until the profiles of PTO shaft and receiving recess of the PTO shaft are in a matching position. This requires a considerable amount of force and is due to contamination such. made even more difficult by greased component.

The object of the invention is to provide a device of the type mentioned, which facilitates a connection of PTO and PTO shaft.

This object is achieved in that a pivot drive device can be coupled to the PTO shaft and decoupled from the PTO shaft and the PTO is coupled in pivotable drive device of the pivot drive means about its axis of rotation driven.

By this arrangement, the propeller shaft needs to be brought by an operator only for coaxial contact of the hub or the coupling part of the propeller shaft to the PTO and then pivot with or without little effort, the PTO by the pivot drive device as far as its axis of rotation until the profiles of PTO shaft and receiving recess of the propeller shaft are in a mating position and the recess of the hub or the coupling part can be easily pushed onto the PTO.

For the purposes of the invention, the term "power take-off shaft" is to be understood as meaning a complete power take-off unit, which may comprise, for example, a power take-off gearbox, a gearbox housing, a power take-off shaft and a PTO stub shaft. Coupling with the power take-off shaft or decoupling from the power take-off shaft can take place via each of the said elements of the power take-off shaft. Likewise, an attack on the PTO shaft via each of the said elements can take place.

In order to hold the pivoting drive device stationary in a ready for actuation position, preferably the pivot drive device is fixedly connected to a component of the motor vehicle or an attachment of the motor vehicle.

The power take-off shaft may be manually driven by the pivot drive means to pivotally drive a suitable engaging element, e.g. a pivotable pawl, acts on the PTO, by means of the actuation of the PTO shaft by the operator with little effort is pivotal.

It is more comfortable if the power take-off shaft can be driven in a pivotable manner by the pivot drive device. In this case, the motor drive can e.g. an electromotive or a hydraulic or a magnetic drive.

The PTO shaft may have at its circumference radially circumferentially distributed uniformly spaced adjusting recesses, in which an actuating element of the pivot drive device is engageable tangentially to the PTO shaft or along the circumference of the PTO shaft is driven drivable

The power take-off shaft may also have at its circumference radially circumferentially uniformly distributed spaced apart approaches, between which an adjusting element of the pivot drive device is engageable, which is movable tangentially to the PTO or along the circumference of the PTO.

In both versions, a positive engagement of the actuating element takes place at the PTO.

In a simple embodiment, the power take-off shaft may have a splined shaft profile or a polygonal profile or a splined shaft profile.

The PTO shaft profile can perform a dual function by coupling the PTO to the PTO and rotating the PTO shaft.

The actuator may be a rotatably driven gear which is engageable and disengageable with the profile of the PTO.

For pivoting the power take-off while the gear is brought into engagement with the profile of the PTO, then rotatably driven until the recess of the hub can be pushed onto the PTO and then the gear again disengaged from the profile of the toothed shaft.

The actuator of the pivot drive device is preferably movable in the decoupling position with a rotationally driven power take-off shaft from the power take-off shaft.

As a result, it is not possible for the pivot drive device to be damaged when the PTO shaft is driven by the drive motor of the motor vehicle and when the PTO shaft is coupled to the PTO shaft.

The motor vehicle may be an agricultural machine, in particular a tractor.

An embodiment of the invention is shown in the drawing. The sole figure of the drawing shows a schematic diagram of an apparatus for fixedly connecting a hub of a propeller shaft with a power take-off PTO of a motor vehicle and will be described in more detail below.

The device shown in the figure has a PTO shaft 1 on, that of a drive motor of a motor vehicle, not shown in a rotational direction 2 , here clockwise about a rotation axis 4 is rotatably driven. The PTO 1 is at its free end as a splined shaft with a plurality of axially extending and the periphery of the PTO 1 radially projecting driver 12 educated. The drivers 12 are even at the periphery of the PTO 1 trained and have gaps between them 13 on.

To the PTO 1 is a not shown hub of a propeller shaft with a recess receivable whose cross section of the spline cross section of the PTO 1 equivalent.

About the propeller shaft accessories of the motor vehicle can be driven.

From a ring-like electromagnet 3 is an axially guided slide 5 transverse to the axis of rotation 4 slidably disposed, the slider 5 at its one end a coaxial in the electromagnet 3 movable anchor 6 having.

By energizing the electromagnet 3 is the anchor 6 and with him the slide 5 by a certain stroke against the force of a compression spring 7 axially displaceable. After completion of the energization of the electromagnet, the slider 5 through the compression spring 7 moved back to its original position.

On the slider 5 is a latch 8th with one end around a pawl axle 9 pivotally hinged, with the pawl 8th by a second compression spring 10 until it touches a stop 11 of the slider 5 with her free end 14 in the circulation area of the PTO shaft formation 1 is pivotable and in this position with the free end 14 into a gap 13 between two drivers 12 the PTO 1 protrudes.

Is in the illustrated position of the latch 8th the electromagnet 3 energized and the slide 5 against the spring force of the compression spring 7 shifted, subjected to the latch 8th with the direction of rotation 2 front side 15 her free end 14 a flank of a driver 12 and pivots the PTO 1 to one of the division of the drivers 12 corresponding angle.

During the subsequent return movement of the slider 5 slides in the direction of rotation 2 rear side 17 the free end 14 the latch 8th along the now the slide 5 next driver 12 and is doing against the force of the second compression spring 10 in a longitudinal groove 16 in the slide 5 collapsed.

By one or more strokes of the slide 5 becomes the PTO 1 so far around the axis of rotation 4 pivoted until the contour of the splined end of the PTO shaft 1 in overlap with the inner contour of the recess of the hub of the PTO shaft, so that the PTO 1 can be introduced into this recess.

After this coupling process, the pawl 8th from the area of the PTO 1 swung out and locked. Should be in a rotary drive the PTO 1 by the drive motor of the motor vehicle, the pawl 8th still in the area of the drivers 12 the PTO 1 are located, it comes only to a folding of the latch 8th through the carriers 12 but not to damage the latch 8th ,

LIST OF REFERENCE NUMBERS

1

PTO

2

direction of rotation

3

electromagnet

4

axis of rotation

5

pusher

6

anchor

7

compression spring

8th

pawl

9

jack axis

10

second compression spring

11

attack

12

takeaway

13

Gaps

14

free end

15

front side

16

longitudinal groove

17

rear side

Claims (10)

Device for fixedly connecting a hub of a propeller shaft to a PTO shaft (1) of a motor vehicle forming a power take-off, wherein the hub has a recess centered on the axis of rotation (4) common with the PTO shaft (1), with which the hub engages positively on the PTO shaft ( 1) is receivable and the hub and the PTO shaft (1) are provided with parallel to the rotation axis (4) extending positively interlocking means for torque transmission, characterized in that a pivot drive means with the PTO (1) coupled and by the PTO (1 ) can be decoupled and the PTO shaft (1) in coupled rotary drive device of the pivot drive means about its axis of rotation (4) is pivotally driven. Device after Claim 1 , characterized in that the pivot drive device is fixedly connected to a component of the motor vehicle or an attachment of the motor vehicle. Device according to one of the preceding claims, characterized in that the PTO shaft is manually driven by the pivot drive means pivotally. Device according to one of Claims 1 and 2 , characterized in that the power take-off shaft (1) is pivotally driven by the motor drive of the pivot drive means. Device according to one of the preceding claims, characterized in that the PTO shaft at its circumference radially circumferentially distributed uniformly spaced adjusting recesses, in which an actuating element of the pivot drive means is engageable tangentially to the PTO shaft or along the periphery of the PTO shaft is driven drivable. Device according to one of Claims 1 to 4 , characterized in that the PTO shaft (1) on its circumference radially circumferentially uniformly distributed spaced apart lugs (12), between which an actuator of the pivot drive device is engageable, the tangential to the PTO (1) or along the circumference of the PTO (1) is movable drivable. Device after Claim 6 , characterized in that the power take-off shaft (1) has a splined shaft profile or a polygonal profile or a splined shaft profile. Device after Claim 7 , characterized in that the adjusting element is a rotatably drivable toothed wheel which can be brought into and out of engagement with the profile of the PTO shaft. Device according to one of Claims 5 or 6 , characterized in that the actuating element of the pivot drive device in the case of a rotationally driven power take-off shaft (1) can be moved by the power take-off shaft (1) in the decoupling position. Device according to one of the preceding claims, characterized in that the motor vehicle is an agricultural machine.

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