GB2190271A

GB2190271A - Pick-up drum for stalk material

Info

Publication number: GB2190271A
Application number: GB08711063A
Authority: GB
Inventors: Fritz Schollhorn
Original assignee: Claas Saulgau GmbH
Current assignee: Claas Saulgau GmbH
Priority date: 1986-05-13
Filing date: 1987-05-11
Publication date: 1987-11-18
Anticipated expiration: 2007-05-11
Also published as: GB2190271B; DE8613011U1; FR2598589A1; FR2598589B1; GB8711063D0

Abstract

In a pick-up drum for stalk material having a central tube (1), tine bars (4, 4') are divided in respect of length and mounted in a mounting plate (2). The associated tine bar halves (4, 4') of each tine bar are rotatably mounted one within the other and preferably share a bearing (3) mounted in the mounting plate (2). <IMAGE>

Description

SPECIFICATION Pick-up drum for stalk material The invention relates to pick-up drums for stalk material (agricultural crop material such as hay, straw or grass) having tine bars which are divided in respect of length, control elements at the ends of the pick-up drum and a mounting plate for mounting the tine bars. In such pick-up drums difficulties are encountered when the tine bars are mounted at or close to the middle of the drum.If the two associated tine bar halves lie in the same radial plane, as shown for example in German utility model No 19 35 777 or German laid-open application (DE-OS) No 32 38 210, then hitherto the mounting of the tine bar halves required such a width that the middle pick-up tines could only be disposed at large spacings relative to each other and it was therefore not possible to prevent the pick-up of material from being adversely affected in the middle region of the drum. In order to counter that difficulty, it has been proposed for example in Patent Specification DE-OS 20 06 923 that the tine bar halves may be arranged in angularly displaced relationship in the peripheral direction, which however involves a higher level of building cost.

According to the invention there is provided a pick-up drum for stalk material having tine bars formed by tine bar halves, control elements at the ends of the pick-up drum and mounting plates for mounting the tine bars, in which for each two associated tine bar halves, one tine bar half is rotatable mounted in the other tine bar half.

Such an arrangement for the two tine bar halves can permit the pick-up tines to be disposed at a very small spacing even at the piont of separation, while involving a very low level of building cost.

The tine bars can be well supported against outside forces, in the middle of the pick-up drum, and the two control elements which are disposed at the ends of the drum do not have to run in completely synchronous relationship.

Preferably the one tine bar half is rotatable mounted in the mounting means of the other tine bar half.

Advantageously the one tine bar half is provided with a head portion having a cylindrical bore therein and the other tine bar half is provided with a head portion having a cylindrical or barrel-shaped projecting portion which is received in the cylindrical bore.

Preferably the head portion with the cylindrical bore has on the outside a cylindrical casing portion which is coaxial therewith and which in turn is rotatable mounted in that one of the mounting plates which is disposed substantially at the middle of the pick-up drum.

The barrel-shaped configuration of the projection, can give the advantage that no jamming occurs in the mounting of the two tine bar halves even if the pick-up drum experiences resilient deformation under the influence of outside forces.

The invention is diagrammatically illustrated by way of example in the accompanying drawing which shows the middle part of a pick-up drum according to the invention and in which only two associated tine bar halves are illustrated for the sake of clarity.

Fixedly connected to a central tube 1 of a pick-up drum at the middle thereof (as also at the two ends) is a mounting plate 2. At its periphery the mounting plate accommodates a plurality of plain friction bearings 3. Extending parrallel to the central tube 1 are tine bars each of which comprise tine bar halves 4 and 4' and which in the illustrated embodiment are formed from shaped angle members. Disposed at the inner end of the tine bar half 4 is a circular section head portion 5 which has a central bore 6, a cylindrical casing portion 7 and a shoulder 8. The cylindrical casing portion 7 passes through the plain bearing 3 while the shoulder 8 is disposed at a small spacing from the side surface of the bearing 3.

Disposed at the inner end of the tine bar half 4' is a head portion 9 which is also of circular section, with a projection 10. As shown in the lower half of the drawing, the projection 10 may be cylindrical or, as shown in the upper part of the drawing, it may be barrel-shaped. The tine bar half 4' is mounted in the central bore 6 by means of the projection 10 engaging in the central bore 6.

Screwed to the tine bar halves 4 and 4' are pick-up tines of which only the free ends 11 are illustrated in the drawing. Stripping loop members 12 are disposed between the free ends 11.

The tine bar halves 4 and 4' rotate in operation about the axis of the central tube 1 and are controlled for pivotal movement about their longitudinal axis by means of control elements which are disposed outside the portion shown by the drawing to the left and to the right thereof.

1. A pick-up drum for stalk material having tine bars formed by tine bar halves, control elements at the ends of the pick-up drum and mounting plates for mounting the tine bars, in which for each two associated tine bar halves, one tine bar half is rotatably mounted in the other tine bar half.

2. A pick-up drum according to claim 1, in which the one tine bar half is rotatably mounted in the mounting means of the other tine bar half.

3. A pick-up drum according to claim 1 or claim 2, in which the one tine bar half is provided with a head portion having a cylindrical bore therein and the other tine bar is pro

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Pick-up drum for stalk material The invention relates to pick-up drums for stalk material (agricultural crop material such as hay, straw or grass) having tine bars which are divided in respect of length, control elements at the ends of the pick-up drum and a mounting plate for mounting the tine bars. In such pick-up drums difficulties are encountered when the tine bars are mounted at or close to the middle of the drum.If the two associated tine bar halves lie in the same radial plane, as shown for example in German utility model No 19 35 777 or German laid-open application (DE-OS) No 32 38 210, then hitherto the mounting of the tine bar halves required such a width that the middle pick-up tines could only be disposed at large spacings relative to each other and it was therefore not possible to prevent the pick-up of material from being adversely affected in the middle region of the drum. In order to counter that difficulty, it has been proposed for example in Patent Specification DE-OS 20 06 923 that the tine bar halves may be arranged in angularly displaced relationship in the peripheral direction, which however involves a higher level of building cost. According to the invention there is provided a pick-up drum for stalk material having tine bars formed by tine bar halves, control elements at the ends of the pick-up drum and mounting plates for mounting the tine bars, in which for each two associated tine bar halves, one tine bar half is rotatable mounted in the other tine bar half. Such an arrangement for the two tine bar halves can permit the pick-up tines to be disposed at a very small spacing even at the piont of separation, while involving a very low level of building cost. The tine bars can be well supported against outside forces, in the middle of the pick-up drum, and the two control elements which are disposed at the ends of the drum do not have to run in completely synchronous relationship. Preferably the one tine bar half is rotatable mounted in the mounting means of the other tine bar half. Advantageously the one tine bar half is provided with a head portion having a cylindrical bore therein and the other tine bar half is provided with a head portion having a cylindrical or barrel-shaped projecting portion which is received in the cylindrical bore. Preferably the head portion with the cylindrical bore has on the outside a cylindrical casing portion which is coaxial therewith and which in turn is rotatable mounted in that one of the mounting plates which is disposed substantially at the middle of the pick-up drum. The barrel-shaped configuration of the projection, can give the advantage that no jamming occurs in the mounting of the two tine bar halves even if the pick-up drum experiences resilient deformation under the influence of outside forces. The invention is diagrammatically illustrated by way of example in the accompanying drawing which shows the middle part of a pick-up drum according to the invention and in which only two associated tine bar halves are illustrated for the sake of clarity. Fixedly connected to a central tube 1 of a pick-up drum at the middle thereof (as also at the two ends) is a mounting plate 2. At its periphery the mounting plate accommodates a plurality of plain friction bearings 3. Extending parrallel to the central tube 1 are tine bars each of which comprise tine bar halves 4 and 4' and which in the illustrated embodiment are formed from shaped angle members. Disposed at the inner end of the tine bar half 4 is a circular section head portion 5 which has a central bore 6, a cylindrical casing portion 7 and a shoulder 8. The cylindrical casing portion 7 passes through the plain bearing 3 while the shoulder 8 is disposed at a small spacing from the side surface of the bearing 3. Disposed at the inner end of the tine bar half 4' is a head portion 9 which is also of circular section, with a projection 10. As shown in the lower half of the drawing, the projection 10 may be cylindrical or, as shown in the upper part of the drawing, it may be barrel-shaped. The tine bar half 4' is mounted in the central bore 6 by means of the projection 10 engaging in the central bore 6. Screwed to the tine bar halves 4 and 4' are pick-up tines of which only the free ends 11 are illustrated in the drawing. Stripping loop members 12 are disposed between the free ends 11. The tine bar halves 4 and 4' rotate in operation about the axis of the central tube 1 and are controlled for pivotal movement about their longitudinal axis by means of control elements which are disposed outside the portion shown by the drawing to the left and to the right thereof. CLAIMS

3. A pick-up drum according to claim 1 or claim 2, in which the one tine bar half is provided with a head portion having a cylindrical bore therein and the other tine bar is pro vided with a head portion having a cylindrical or barrel-shaped projecting portion which is received in the cylindrical bore.

4. A pick-up drum according to claim 3, in which the head portion with the cylindrical bore has on the outside a cylindrical casing portion which is coaxial therewith and which in turn is rotatably mounted in that one of the mounting plates which is disposed substantially at the middle of the pick-up drum.

5. A pick-up drum for stalk material substantially as hereinbefore described and illustrated with reference to the accompanying drawing.