The object of the invention is an equipment for the attach- ment of an accessory to the boom of a working machine. The equipment consists of a support block with a quick-mounting device for the attachment of an accessory to the equipment and further to the working machine, of a mounting bracket at the other end of the equipment with a mounting device for removable mounting of the equipment on the boom or on the quick-mounting fixture attached to the boom. The support block and the mounting bracket can pivot on the spindle arms, attached to them, by a power actuator.

It is customary to attach various accessories to the boom of working machines so that they can be used for different tasks. These kind of accessories are, for instance, plows, buckets, forklift forks, lifting beams, extension beams, excavation equipment etc. A so called quick-mounting fixture is attached to the boom of a working machine. This fixture enables easy mounting and release of various tools. .This kind of a quick-mounting fixture is usually permanently fixed to the boom of a working machine, and releasing it is difficult.

At various tasks, however, different properties are required from different accessories. When using accessories, it is preferable to be able to turn the accessory in multiple directions in relation to the boom. It is earlier known that a tool is permanently fixed to turning devices, which are fixed permanently or removably to the boom. Through these devices a swinging motion is achieved but an additional effective direction of the accessory to various positions is not possible.

It is the purpose of the invention to present an equipment for the attachment of an accessory to a working machine, by

which equipment the drawbacks of present equipment are eli¬ minated. In particular, it is the purpose of the invention to present an equipment, to which an accessory is attached and which can be turned in a desired direction and in as multiple ways as possible in relation to the boom and which is easily attached to and removed from the boom. Furthermo¬ re, it is the purpose of the invention to present an equip¬ ment which is simple in construction.

The purpose of the invention is achieved by an equipment characterized by what is stated in the claims.

In the equipment, related to the invention, the support block consists of a rotating ring attached to the spindle arms, which rotating ring is rotatable around the axis per¬ pendicular to the pivoting axis of the spindle arms. The support block also consists of a support frame attached to the rotating ring, to which support frame quick-mounting device is attached. The support frame, and the accessory mounted on it, can thus be rotated into a desired position and the task can be performed in a proper angle. The equip¬ ment, related to the invention, can be directly attached to the boom and can easily be removed according to the task, for instance, when using a different kind of equipment or accessory. The equipment can also easily be mounted on and removed from the quick-mounting fixture attached to the boom. In the embodiments of the invention, various equip¬ ment, according to the invention, can be used on the boom and desired tools can be mounted on the equipment. The equipment, being turnable and rotatable, enables versatile tasks to be performed by the accessory, even in places not accessible by permanently fixed equipment, or there is no need to turn the working machine as much at various stages of the task. For example, plowing in various directions can be performed, as well as drilling, without ever having to move the boom or the entire working machine.

^W < 96/08956 PC /FI95/00468

According to the invention the rotating ring is preferably rotatable 360 ^* in both directions. This kind of a structure makes it possible to turn the accessory exactly to the correct direction. For example, a hydraulic hammer can be directed exactly to the right spot in the correct angle.

In the following the invention is further explained with reference to the attached drawings, in which figure 1 shows the side view of one embodiment of the equip- ment, related to the invention, being mounted on a working machine, figure 2 shows the top view of the equipment of figure 1 and, figure 3 shows the top view of the equipment of figure 1 with the equipment swiveled to the side.

In the embodiments, as shown in figuress 1-3, the equipment consists of the support block 1, of the quick-mounting devices 2 and 3 attached to it, of the mounting bracket 5 at the other end of the equipment, where the support block 1 and the mounting bracket 5 are pivotally attached to each other through the spindle arms 6 and 7, and of the power actuator 8 to swivel the support block and the mounting bracket in relation to each other. The quick-mounting devi¬ ces 2 and 3 are commonly known specific quick-mounting devices, by which the accessory 4 can be mounted on the equipment and further on the boom 10 of the working machine. The support block 1 consists of a support frame 13 and of a rotating ring 12 attached to it. The rotating ring 12 is attached rotatably to the plate 14 which is attached to the spindle arms 6, and the rotating rings can be rotated, in this application, around the axis perpendicular to the pivoting axis of the spindle arms 6. The rotating ring 12 can be rotated 360 ^* in both directions. The rotation is accomplished either mechanically or hydraulically.

The mounting bracket 5 consists of the commonly known moun¬ ting devices 9 for mounting the equipment removably on the

separate quick-mounting fixture 11, attached permanently to the boom of the working machine. The spindle arms 6 and 7, which in this application are like plates, are attached at one end to the support block 1 or to the mounting bracket 5 respectively, and are attached to each other so that they can be swiveled in relation to each other through a pivot or similar. The power actuator 8 is a hydraulic cylinder moun¬ ted between the support block and the mounting bracket and connected to the hydraulic system of the working machine and can be controlled, for instance, from the cabinet of the working machine.

The above described preferred device must not be understood to limit the applications of the invention but it can vary within the scope of the annexed claims.