SU397443A1 - DEVICE FOR THE COASTAL RABBAN OF FOREST MATERIALS IN THE BEAMS - Google Patents

Description

one

The invention can be used in forest industry.

A device for coastal raft of timber products in bundles, including a movable base with a mounted multi-jaw maxillary mechanism for gripping, holding and compressing the beam, operating from a hydraulic drive is known. However, when lifting coaxially in the jaw mechanism of the beams on the movable base of the wheel type and lowering the beams from it, there is a significant overturning moment acting on the entire device and creating large loads on the wheels of the movable base.

The purpose of the invention is to provide the possibility of iodule on the movable base and lowering from it a jaw mechanism with a bundle of logs while simultaneously reducing the amount of overturning moment and load from it on the wheels of the movable base.

The proposed device is made with three-shoulder loading and unloading levers, pivotally connected by means of power cylinders with a jaw mechanism and one arm with a movable base. With free balls (shoulders), the levers extend under the beam when it rafts, iodoles or descends beyond the diametral plane passing through the center of gravity of the beam cross section, and other free ends of the arms can extend to the projection line of the extreme wheel axle of the rolling

base on horizontal plane.

The maxillary link, to which a bundle of logs is pressed during the rafting process, is formed with a half of a regular polygon and preferably half an octahedron in the form of a raft, and only the pressing links with arcs forming a circle, which simplifies the technology of the maxillary mechanism.

The ratio of the lengths of the support arms of the three arms is such that the length of one arm may exceed the distance from the axis of rotation to the diametral plane of engagement, and the length of the other arm may be such that its free end can be located

beyond the projection line of the wheel axle on a horizontal plane.

FIG. 1 shows a side view of the device, which is lowered from a moving base; in fig. 2 - the same in

elevation m, i.e. transport position.

The device includes a movable base / with a multi-jawed jaw mechanism fixed on it in the form of an octahedral jaw link 2, to which a bundle of logs is set in the process of rafting, and

pressing links 3. and 4 with forming arcs of a circle in VIEW. Maxillary fur-anism through link 2 is strengthened jointly and coaxially with the extreme wheel axis of the moving base. On the same link, hydraulic cylinders 5 are pivotally secured, swiveling through a hinged joint on a three-arm loading and unloading levers 6, hinged and coaxially aligned with the extreme wheel axle of the wheels 7 of the movable base. The loading and unloading levers with one free ends extend when rafting, raising or lowering under the beam, and the other free ends of the levers prostrate to the LINE projection of the extreme wheel, the axis of the movable base on the horizontal plane. The power cylinders 8 with one end are pivotally hinged to the movable base, and the other to the jaw link 2. The power hydraulic cylinders 9 and 10 are pivotally attached through the thrust levers //, 12 and 13 to the jaw links m 2, 3 and 4.

The device works as follows. When the jaw mechanism is filled with logs, hydraulic cylinders 9 and 10 are put into operation, and the logs are compressed by the B bundle. To load the beam on the movable base, hydraulic cylinders 5 and 8 are put into operation, which, rotating the entire jaw mechanism around the extreme axis of the wheels 7, lift it and stack it together with the beam on the carriage of the movable base. In this case, the hydraulic cylinders 5 pivotally rest on the three-arm loading and unloading levers, transferring to THEM the load of the weight of the jaw mechanism with a bundle of logs. When the upper end position is reached, i.e., when the center of gravity passes the jaw mechanism with a bundle of logs through the top dead center, the work of the hydraulic cylinders 5 on the lift stops, and the work of the hydraulic cylinders 8 (continues until the end of the laying of the jaw mechanism with the beam on the carriage of the moving After that, the hydraulic cylinders 5 are again switched on, during which the stems of the cylinders are pulled in

lifting the loading arms to the transport position.

Unloading the device, i.e. lowering the jaw mechanism with a beam from a rolling

the base begins with the commissioning of the hydraulic cylinders 5, when extending the rods of which the levers 6 are prepared to the initial unloading position, then the hydraulic cylinders 8 are turned on, which raise

a jaw mechanism with a beam from a movable base, by rotating them around the wheel axle, and with the passage of the upper dead center, set the jaw mechanism on the loading and unloading levers. Further

the lowering of the maxillary mechanism with the beam is carried out under the influence of the weight of the latter by throttling the flow of working fluid squeezed out of the working cavities of the hydraulic cylinders 5 and S by their pistons into

hydraulic drain line.

Subject invention

Claims (2)

1. A device for coastal rafting of timber products in a bundle, КИИ, including a movable base with a multi-link jaw mechanism mounted on it for gripping, holding and compressing the beam, characterized in with a bundle of logs while simultaneously reducing the magnitude of the overturning moment and the load from it on the wheels of the rolling base, it is made with three-arm loading and unloading levers, which are hinged with the help of power cylinders with a jaw mechanism and one shoulder - with a movable base. 2. The device according to claim 1, characterized in that the ratio of the lengths of the support arms of the three-arm lever is such that the length of one arm exceeds the distance from the axis of rotation to the diametral plane of the gripper, and the length the other shoulder is selected such that its free end is located behind the line of projection of the wheel axle on the horizontal plane. ) 2 and FIG. 2