FI109264B - Feed wheel for a timber feed arrangement - Google Patents

Description

109264 WOOD FEEDER FEEDER WHEEL

The present invention relates to a feed wheel for a wood feeding device comprising a center portion and a peripheral portion.

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There are various feeders for feeding wood through a wood handling device such as a harvester. The wood must be fed in as little as possible to the wood being treated. Various flexible members are currently used in the wood feeders and in their feed wheels. For this purpose, it is known to use various wheel solutions using an intermediate resilient material such as rubber or the like. Generally, harder and harder material, such as a chain mesh, chain or steel ring, having gripping members such as gripping bars or teeth, will have to be used in the parts facing the wood. The intervening material is often vulcanized on the wheel rim.

20 Manufacturing is expensive because it uses a variety of materials and involves many different work stages. Rubber is an easy-to-wear material and is subjected to shocks or other, easily, ···, damage when working. Such a solution is also expensive »# 25 in running costs. The chains travel and wear rubber, creating high surface pressures and damage to the I »· · * · 'branches of the feed wood. Such solutions i i * * · "· are often weighty, increasing the weight of the entire device.

* · * Tensioning and repairing chains requires maintenance. Since there are no flexible wheels with low cost economy in operation, rigid steel wheels are generally used which transmit the strokes directly to the feed motor shaft and upstream of the harvester head body.

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Hill 35 An object of the invention is to provide a feeder wheel for a wood feeding device * *, which eliminates the above disadvantages.

I * · ': In particular, it is an object of the invention to provide a

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Mt 2 109264 Feeder Feed Wheel with good flexibility and simple and inexpensive fabrication. It is a further object of the invention to provide a feed wheel which has a higher service life than current feed wheels and has low maintenance and operating costs. It is a further object of the invention to provide a feed wheel which, when used, reduces damage to the wood and improves grip.

The object of the invention is achieved by a feeder wheel for a wood feeder, characterized by what is claimed.

In the feed wheel according to the invention, the peripheral part is rim-shaped 15 and the feed wheel comprises intermediate elements, preferably rib-like elastic parts, through which the peripheral part and the center part are connected. Such a feed wheel achieves a substantial improvement over previously known feed wheels.

Because the wheel is made of a single piece, its manufacture is relatively simple. It can also be done by casting. By utilizing the inherent elastic properties of steel, the structure becomes compact and lightweight. It is also possible to improve the life span of current flexible feed wheels. Flexibility and workmanship and: 25 quality are the same as on other flexible wheels.

· * · The structure is also ideally suited for handling multiple trees at the same time, or bulk handling, because the feed wheel becomes wider than normal when the feed roller ribs! .. * overlap each other. The purchase and operating costs of the feed wheel are inexpensive because the structure "·" is maintenance-free. The flexible feed wheel substantially reduces the strain on the feed motor and the frame. Because the ·. · * Circumferential portion has the ability to bend during loading, V: more teeth are simultaneously in contact with the wood. This 35 minimizes damage to the wood while also improving grip.

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In a preferred embodiment of the invention, the materials of the peripheral portion and the elastic portion and the central portion are of the same or similar material to each other, such as preferably steel or molding. Making parts from the same material is simple.

In another preferred embodiment of the invention, the feed wheel has a slot in the peripheral portion and a cam associated with the center portion at a distance therefrom. In another solution, the structure 10 may be the other way round, i.e. a slot in the center portion and a cam in the peripheral portion. Such a structure allows for flexible movement and prevents overload of the spring load.

In a third preferred embodiment of the invention, each rib 15 is arranged to extend outwardly from the peripheral portion in the direction of the axis of rotation. This enables bulk processing.

The invention will now be explained in more detail with reference to the accompanying drawings, in which Fig. 1 shows an embodiment of the feed wheel according to the invention obliquely viewed, Fig. 2 shows the feed wheel according to Fig. 1, viewed from above; 25 na, ··· 'Figures 4 and 5 show the feed wheel of Figs. 7 is a side view of another embodiment of the sprocket portion of the feed wheel.

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In the embodiment of Figs. 1-6, the feed wheel comprises a hub member 1, a rib portion 2 attached thereto, and an annular peripheral member 2 fixedly connected to the spring springs. a rib portion 9 which engages a spring portion 6 which defines a curved member on whose outer surface the peripheral portion 2 is secured. The spring member is resilient to the attachment of the center member of the rib member. The second projection of the rib portion is a cam 5 which is spaced from the spring portion and extends toward the lower portion 5 of the spring portion. The spring member has a slot-like structure 4, i.e. the outermost end 10 of the spring member is bent towards the peripheral portion and extends to the other side of the cam and is pressable against the peripheral side of the cam portion. In addition, the spring member has a protruding portion 8 on the outer surface.

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The peripheral portion 2 is secured to the outer surface of the spring members 6 so that the spring member can move relative to the cam and the other rib portion and the center portion. A portion of protruding teeth 7, spikes, or the like 15 is disposed on the outer surface of the peripheral portion 2 to improve grip. Some teeth, tines, or the like are on the outer surface of the spring member.

In Fig. 3, the letter X is represented by the elastic travel, the spring portion 6 of which is movable relative to the cam 5 of the rib portion 9.

In addition, Figures 4 and 5 show how the spring member can move as the force F is applied from different directions to the peripheral member or elastic member. In Figure 4, the force exerts on the spring member from the outside of the feed wheel. In this case, the inner surface of the spring member slot 4 is pressed against the cam 5. In Fig. 5, the force F is applied to the center v * 25. Then the outermost end 10 of the spring member 6 is pressed against the other side of the ·: * cam.

• «» · • ·: Figure 6 shows the operation of two feed wheels. The wood 11 is on top of two feed wheels and the feed wheels move the wood ·; ·, 30 forward.

Fig. 7 shows a loose peripheral part 2, which is loosely attached to a groove or similar formed on the spring part 3 of the elastic member. However, the attachment is such that the circumferential portion cannot be released and rotation between the peripheral portion and the spring portion is prevented.

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The invention is not limited to the preferred embodiment shown, but may vary within the scope of the inventive idea of the claims.

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Claims (7)

109264 A wood feeder feed wheel having a center portion (1), a rim peripheral portion (2) and a spring portion (3), wherein the feed pulley is circumferentially resilient with respect to the center portion (1), both in the rotational direction of the feed wheel and , that the elastic members (3) are fixedly or permanently attached to the hub member (1) and / or the peripheral member (2). Feed wheel according to Claim 1, characterized in that the center part (1), the peripheral part (2) and the spring members (3) are made of the same material, preferably steel or cast metal, or of a material similar to each other. Feed wheel according to Claim 1 or 2, characterized in that the feed wheel has a slot (4) formed in the peripheral part (2) and a cam (5) connected to the center part (1) at a distance 15 thereof. Feed wheel according to Claim 1 or 2, characterized in that the feed wheel has a slot formed in the center part and a cam located at a distance relative to the peripheral part. 20 Feed wheel according to one of Claims 1 to 4, characterized in that · *: The ribs (9) of the parts (3) are arranged to extend from the peripheral part (2) in the direction of the axis of rotation. outward. • · '·, *; 25 Feed wheel according to one of Claims 1 to 5, characterized in that the elastic members (3) are curved-shaped bending springs. • tsp Feeding wheel according to one of Claims 1 to 6, characterized in that the center part (1) is plate-shaped and is arranged to allow axial flexibility of the peripheral part (2). ':' '= 30 109264