GB2095525A

GB2095525A - Rotary side-delivery hay rake

Info

Publication number: GB2095525A
Application number: GB8208646A
Authority: GB
Original assignee: SIP STROJNA IND
Current assignee: SIP STROJNA IND
Priority date: 1981-03-31
Filing date: 1982-03-24
Publication date: 1982-10-06
Also published as: DE3211579A1; HU186918B; FR2502890B3; DE3211579C2; CS235011B2; YU83681A; PL129608B1; GB2095525B; FR2502890A1; DD208905A5; YU43227B; PL235710A1

Abstract

A rotary side-delivery hay rake comprises two rake wheel units (1, 1') which can be coupled together so that the secondary unit (1') may be located on either side or behind the main unit (1) when the hay rake is towed. A drive shaft for the main unit rake wheel (4) carries bevel gearing (5) to drive two splined shafts selectively connectable to the secondary unit rake wheel (4'). A frame member (2') of the secondary unit has pivotal end connections to allow vertical movement of the secondary unit relative to the main unit to allow the rake to be used on uneven ground. A wheeled carriage (3') of the secondary unit is adjustable by a lever (9) so that its wheels can be oriented correctly for movement in any of the secondary units' positions relative to the main unit. <IMAGE>

Description

SPECIFICATION Rotary side-delivery hay rake The present invention relates to a rotary sidedelivery hay rake comprising two separable mutually connected rotary units. It is intended for the side-delivery of half-dry and dry hay in swathes on flat or rugged ground.

Known types of rotary side-delivery hay rakes generally comprise a single rotary hay rake having an area output of 3 m. at most.

There are also known rotary side-delivery hay rakes provided with two rotary units. The area output of such rakes, however, dose not exceed approx. 4 m.

The main defect of known constructions with one rotary hay rake is their relatively small operating width of only 3 to 4 m. In the hitherto known rotary side-delivery hay rakes with two rotary units, the rigid connection of the two units is regarded as a defect as it makes it very difficult or even impossible to achieve the side-delivery of a greater quantity of hay and, on the other hand, such rigidly connected rotary units cannot be used on a rugged ground as the rigid connection does not allow any adaptation of the rotary hay rakes to the ground. Due to the inseparable connection of the rotary units such types of hay rakes are not convenient for transport on roads with traffic owing to their relatively great width.

A construction of hay rack according to this invention is essentially based on the feature that a main rotary hay rake unit provided with a main rotary rake, drivable by means of a Cardan shaft on a tractor, has a combined connection element, which makes possible that either to its right or to its left side another rotary hay rake unit may be connected, said other rotary unit being provided with a pivoted connection element. Said pivoted connection element allows a vertical movement of the second rotary unit relative to the main rotary unit, thereby assuring an optimum adaptation of the second rotary unit to uneven ground. Said second rotary unit can also be coupled to the main rotary unit in a straight line so as to assure a smaller width of the entire machine when trailed on a road.

An embodiment of the invention will now be described with reference to the accompanying drawings, wherein: Figure 1 is a rotary side-delivery hay rake in plan view when making two swathes of hay; Figure 2 is the rear view of the rotary sidedelivery hay rake in the direction of the arrow II in Fig. 1, showing the adaptability of the rotary hay rake to uneven ground; Figure 3 is a similar view to Fig. 1 of the hay rake arranged for making only one swath of hay; Figure 4 is a similar view of Figs. 1 and 3, showing the position of both rotary rake units in a straight line for the transport on the road; Figure 5 is the detail V of Fig. 1 showing the coupling point for the second rotary hay rake unit, arranged on the main rotary unit; Figure 6 is a side view in the direction of the arrow VI of Fig. 5;; Figure 7 is a side view in the direction of the arrow VII of Fig. 6; Figure 8 is the detail Vlil of Fig. 1 showing the pivoted connection element of the second rotary hay rake unit; Figure 9 is a side view in the direction of the arrow IX of Fig. 8.

The rotary side-delivery hay rake according to the invention comprises a main rotary hay rake unit 1 provided with a frame 2, a wheeled carriage 3 and a rotary rake wheel 4 having the form of a star wheel, and a second rotary hay rake unit 1', provided with a frame 2', a wheeled carriage 3' and a rotary rake wheel 4' having the form of a star wheel, both above-mentioned rotary rake wheels 4 and 4' having the same construction. In each frame 2, 2' there is arranged a driving shaft for the respective rotary rake wheel 4', 4'.

The frame 2 supports a bevel wheel gearing 5 to drive the rake wheels 4, 4'. Said bevel wheel gearing 5 makes it possible for the second rotary rake wheel 4' to be coupled to the right or to the left of the gearing 5. In the direction of traction the frame 2 ends in a traction eye 6. The gearing is driven by means of a drive shaft. At the end of the frame 2 opposite to said traction eye 6 there is located an attachment point 7 for coupling the second rotary hay rake unit 1'. The second rotatory hay rake carriage 3' is provided with a set of swivelling wheels, whereas the main rotary hay rake unit has a carriage with the wheels on fixed axes. The bevel wheel gearing 5 shown in Figs. 5 and 6 is arranged on the frame 2 and is provided with a housing 8.On either end on its left and its right side-seen in the direction of traction-said housing 8 has a pair of attachment plates 81 with bolts 82 for the pivoted connection of the second rotary hay rake 1', to allow a swinging motion in vertical plane for the rotary hay rake unit 1'. Optionally the housing 8 is formed in such a way that the length A of the left-hand side attaching plates 81, measured from the longitudinal axis of the frame 2 to the geometrical axis of the bolt 82, is three times the length B of the right-hand side attaching plates 81, measured between the longitudinal axis of the frame 2 and the geometrical axis of the eyes (for bolts) belonging to the attaching plates 81 on the right side of the gearing 5 (see Fig. 5).

Out of the gearing 5 there extends from its left and right side a splined shaft 51, 52 respectively, the splined shaft 51 on the left side being supported by means of a transverse truss 83 of the housing 8, while the right splined shaft 52 forms an overhanging shaft. The left shaft 51 is provided with a universal coupling 20 intended for the power transmission to the rotary rake 4', so as to allow the latter to adapt itself to the rugosities of the ground.

In order to achieve an optimum adaptation of the second rotary rake wheel 4' to uneven ground, between the frame 2' and the second rotary hay rake unit 1' there is arranged a hinge 42 provided with a bolt 42' as shown in Figs. 8 and 9. The second rotary hay rake unit 1' is provided with two arms 41 facing each other and mating with arms 21 of the frame 2', said arms 21, 41 being connected by means of a bolt 42'. At least one of the two arms 21 has an elongation extending to the flank of a shoulder 22 belonging to the rotary hay rake unit 1', the elongation of said arm 21 being provided with an extension 43 with a locking pin 44, arranged opposite of said shoulder 22.The shoulder 22 as well as the extension 43 are provided with borings, into which in their aligned position said locking pin 44 can be inserted so as to assure a rigid connection of the rotary hay rake unit 1' to the frame 2', which in their unlocked position are swingable to each other in the vertical plane. The driving shaft belonging to the second rotary rake wheel 4' is provided with a universal coupling 23 arranged aligned with the hinge 42.

The second rotary hay rake unit 1' carries on its frame 2' a lever 9 for the fixing of the orientation of the sets of swivelling wheels belonging to the carriage 3', whereby said frame 2' with its appertaining driving shaft can be turned around the vertical axis of the second rotary hay rake unit 1' against the carriage 3', depending on whether the second rotary hay rake unit 1' should be located on the left side, on the right side or behind the main rotary hay rake unit 1.

The rotary side-delivery hay rake according to the invention works in the following way.

An explanation will first be made on the basis of Fig. 1, in which there is shown the machine in the position for making two swaths of hay, which is especially used in the case of a great quantity of hay, e.g. at the first harvest, or in the case when one wishes to form smaller swaths of hay for later ensilage or baling for forage. The second rotary hay rake unit 1' is coupled to the main rotary hay rake unit 1 and receives the driving power by means bf the bevel wheel gearing 5 from its left side. The second rotary hay rake unit 1' is therefore located somewhat ahead of the main rotary hay rake unit 1 and is laterally displaced for an entire width of the rake (seen in the driving direction). When trailed by a tractor both rotary rakes 4, 4' turn anti-clockwise and from each its own swath 10 of hay (Fig. 1).

The arrangement according to Fig. 3 is intended to produce only one swath of hay, which is used in cases when there is a smaller quantity of hay or when it is desired to obtain a single large swath of hay. In the above working arrangement the second rotary hay rake unit 1' is coupled to the main rotary hay rake unit 1 by means of its bevel wheel gearing 5, so that the second rotary hay rake unit 1' is arranged somewhat ahead of the main rotary hay rake unit 1 and is laterally displaced sufficiently to the right side as to assure that the rotary rake wheel 4' gathers the hay and pushes it to the radius of action of the rake wheel 4 (belonging to the main rotary unit 1), which in its turn grasps the hay and puts it in a single swath 10 of hay.In both previously described arrangement (according to Figs 1 and 3) it is necessary to disengage the locking connection between the shoulder 22 and the extension 43 provided with the locking pin 44 in order to obtain a swingable connection of the second rotary hay rake unit 1' and to assure hereby an optimum adaptation of the rake wheel 4' to uneven ground.

The arrangement according to Fig. 4 is intended for the transport of the device on a road. In this arrangement, the second rotary hay rake unit 1 is by means of its frame 2' connected to the attachment point 7, while the shoulder 22 and the extension 43 are locked to each other by means of the locking pin 44. In order to obtain the above-described arrangements, however, it is necessary to disengage a drop-pin locking mechanism by means of the lever 9 because only after said disengaging operation it is possible to turn the frame 2' around the vertical axis of the rotary hay rate unit 1'.

Claims

1. A rotary side-delivery hay rake comprising at least two rotary rake units, comprising a main rotary hay rake unit and a second rotary hay rake unit separably connected to each other so that the second rotary hay rake unit can be coupled to a frame of the main rotary hay rake unit by means of a housing to the left as well as to the right side of the main rotary hay rake unit.

2. A rotary side-delivery hay rake according to claim 1, wherein the housing on its left and right side is provided with two attach ment plates each, on which plates the second rotary hay rake unit can be coupled by means of bolts so as to allow a swinging movement of said second rotary hay rake unit in a vertical plane.

3. A rotary side-delivery hay rake accord ing to claim 2, wherein the attachment plates provided on one side of the frame have a length three times the length of the attach ment plates arranged on the other side of said frame, both mentioned lengths being measured from the longitudinal axis of the frame.

4. A rotary side-delivery hay rake accord ing to any of the preceding claims, wherein between a frame and the rake wheel of the second rotary hay rake unit there is arranged a hinge provided with a bolt, the second rotary hay rake unit being provided with two arms to be joined to a pair of arms of the frame by bolts, and wherein at least one of the frame arms has an extension in a region of a shoulder on the second rotary hay rake unit and on its end facing the shoulder is provided with a further extension carrying a locking pin to engage the shoulder.

5. A rotary side-delivery hay rake according to claim 1, wherein the second rotary hay rake unit on its frame is provided with a lever to adjust the position of a wheeled carriage supporting the second rotary hay rake unit so that the carriage wheels are correctly oriented to enable the two units to be towed in any position in which they are connected.

6. A rotary side-delivery hay rake constructed and arranged substantially as hereinbefore described and shown in the accompanying drawings.