RU2761556C1 - Forwarder - Google Patents

Abstract

FIELD: forestry industry.SUBSTANCE: invention relates to the forestry industry, and in particular to the structures of a machine for transporting logs. The forwarder contains an articulated frame, consisting of two semi-frames, timber bunkers, mounted on the frame; a cabin fixed on one of the semi-frames on a turntable with the ability to rotate in a horizontal plane; and a manipulator with a grab mounted on said rotary platform for rotation together with the cabin. At the same time, timber bunkers are installed on both half-frames, and the cabin is fixed on one of the half-frames by cantilever and is located above the frame in the articulation zone of the half-frames.EFFECT: the usable area for the placement of timber is increased, the uniformity of the load distribution of the vehicle both in the empty and in the loaded state is increased, the operator's view during operation and the possibility of shuttle movement are improved.5 cl, 3 dwg

Description

[01] Technical field

[02] The invention relates to the forestry industry, in particular to the structures of the forwarder (machine for transporting logs). which can be used for loading timber at the place of harvesting its delivery and unloading on a timber road or in a warehouse.

[03] State of the art

[04] Standard forwarders include an articulated frame consisting of two semi-frames. The operator's cab is located on the front half-frame, and on the rear half-frame there is a loading manipulator and bunks for placing timber (for example, RF patent for invention RU2671802, 11/06/2018). The main disadvantage of this type of construction is the uneven distribution of the load between the half frames. In the empty state, the main weight falls on the front half-frame where the cab, engine and other elements are located, and after loading with timber, the main load is created in the rear half-frame. This leads to a deterioration in the forwarder's passability in off-road conditions. In addition, this design creates difficulties for the operator when loading timber due to limited visibility and difficulty in maneuvering.

[05] The closest analogue of the invention is the forwarder disclosed in the publication of the US application US2021059131A1, 03/04/2021. The device includes an articulated frame, consisting of two half-frames, bunkers for placing timber, mounted on the rear half-frame, a cabin mounted on the front half-frame on a rotating platform and a manipulator with a grab placed on the specified rotary platform with the ability to rotate in a horizontal plane together with the cabin ... Due to the presence of a rotary cabin, on which the manipulator is mounted, in this analogue the problem of the convenience of work is partially solved. However, the presence of one cargo area on the rear semi-frame, with a machine width of about 3 m and a carrying capacity of 12 tons and more, implies a height of the transported pack of more than 2.5 m. covered with submerged timber.

[06] In addition, in this structure, the load is unevenly distributed between the frame portions, which creates the problems described above.

[07] Disclosure of the invention

[08] The main technical problems to be solved by the claimed invention are the large weight of the machine in relation to the transported cargo, the unacceptably high specific load on the soil at full load, the uneven load on the front and rear frames both for an empty machine and for a loaded one. , as well as the lack of visibility when reversing with a full load, which requires the presence of video cameras.

[09] The technical result of the invention is to increase the usable area for placing timber, increase the uniformity of the load distribution of the vehicle both in the empty and in the loaded state, improve the operator's view during operation and provide the possibility of shuttle movement.

[010] The specified technical result is achieved in the claimed invention due to the fact that the forwarder contains: an articulated frame, consisting of two half-frames; frame-mounted timber bunks; a cabin fixed on one of the semi-frames on a turntable with the ability to rotate in a horizontal plane; and a manipulator with a grab mounted on said rotary platform for rotation together with the cabin. At the same time, unlike the closest analogue, timber bunkers are installed on both half-frames, and the cabin is fixed on one of the half-frames by cantilever and is located above the frame in the articulation zone of the half-frames (1), (2).

[011] In addition, in order to achieve the technical result, particular embodiments of the device are provided, according to which:

[012] - a cabin with a manipulator is fixed on one of the half-frames using an inclined support;

[013] - an engine, hydraulic pumps, a radiator and a hydraulic tank are located on one of the half-frames, and an inclined support and a fuel tank (gas tank) on the other;

[014] - the bunks have a bowl-shaped profile with a recessed central part located in the space between the frame wheels;

[015] - protective screens for the cab are installed on both half-frames.

[016] Unlike analogs, in the proposed invention, both half-frames are designed for loading timber, which is solved due to the presence of a cantilever mounting of the cab and placing it above the frame in the area of the pivot joint of the half-frames. As a result, the load in this structure is evenly distributed both in the case of an empty and in the case of a loaded forwarder. Moreover, the usable area for loading timber is increased, which halves the height of the stack at each loading area, giving the operator a clear view and lowering the center of gravity of the loaded machine. As a result, the weight of the power structure of the machine is reduced, its passability is increased, as well as the productivity of logging operations.

[017] The use of the cab and boom mounted on a single slewing platform in combination with the above-mentioned console mount simplifies the operator's work by reducing the height of the timber bundle and improving visibility during loading and unloading, as well as the possibility of shuttle movement (in any direction).

In other words, one of the half-frames can function as a front or rear bogie, depending on the direction of movement of the forwarder and the position of the cab.

[018] Brief Description of the Drawings

[019] The invention is illustrated by drawings, where:

Figure 1 is a schematic side view of a forwarder;

Figure 2 shows an end view of the forwarder (back or front);

Figure 3 is an oblique view of the forwarder.

[020] Structural elements are indicated in the figures by the following reference numbers

yami:

1 - the first half-frame,

2 - the second half-frame,

3 - bunk,

4 - a cabin,

5 - manipulator,

6 - grab,

7 - inclined support,

8 - turntable,

9 - protective screen.

[021] Implementation of the invention

[022] The claimed forwarder comprises an articulated frame consisting of a first (1) and a second (2) semi-frame with wheels. Above the frame in the articulation zone of the half-frames (1) and (2) there is a cabin (4), as well as a manipulator (5) with a grab (6) for grabbing timber.

[023] The cab (4) with the manipulator (5) are cantilevered on one of the half frames (1) or (2) with the help of an inclined support (7). The specified support (7) has a rotary platform (8), which allows the cab (4) together with the manipulator (5) to rotate about the vertical axis (in the horizontal plane) by 360 °.

[024] In a preferred embodiment of the invention, on one of the half-frames (for example, half-frame 1, which is a motor), there is an engine, hydraulic pumps, a radiator and a hydraulic tank (not shown in the drawings), and on the other half-frame (for example, half-frame 2, which is driver's) - an inclined support (7) and a fuel tank (not shown in the drawings). This allows for additional load balancing between half frames. However, such an arrangement is not required and other options for the arrangement of equipment are possible.

[025] On both semi-frames (1) and (2), bunks (3) (guides) are installed for placing timber along the axis of the frame. Said bunks (3) can have a bowl-shaped profile, provided with a deeper central part for laying timber between the wheels of the frame, and shallower side parts that allow placing timber above the wheels (see Fig. 2).

[026] To protect the cab (4) from timber, the semi-frames (1), (2) can be equipped with screens (9) that separate the central area of the frame, where the cab is located, from the peripheral areas of the frame, where the timber is placed.

[027] The forwarder operates as follows.

[028] When the forwarder is at the loading place, the operator turns the cab (4) together with the manipulator (5) to the required position, grabs the timber with a grab (6) and loads it into one of the half frames (1) or (2). At the same time, it is desirable to ensure uniform loading of semi-frames (1) and (2) with timber. Then the user orientates the cabin (4) along the frame axis in the required direction and transports the timber to the unloading point. Unloading the material is similar.

Claims (5)

1. Forwarder, containing: articulated frame, consisting of two semi-frames (1), (2); bunks (3) for timber, mounted on the frame; a cabin (4), fixed on one of the semi-frames (1), (2) on a turntable (8) with the ability to rotate in a horizontal plane; and a manipulator (5) with a grab (6) mounted on said rotary platform (8) with the ability to rotate together with the cabin (4), characterized in that the cones (3) for timber are installed on both half frames (1), (2) , while the cabin (4) is fixed on one of the half-frames (1), (2) cantilever and is located above the frame in the articulation zone of the half-frames (1), (2). 2. Forwarder according to claim 1, characterized in that the cab (4) and the manipulator (5) are fixed on one of the half frames (1), (2) by means of an inclined support (7). 3. A forwarder according to claim 2, characterized in that one of the half-frames (1), (2) contains the engine, hydraulic pumps, a radiator and a hydraulic tank, and the other has an inclined support (7) and a fuel tank. 4. Forwarder according to claim 1, characterized in that the cones (3) have a bowl-shaped profile with a recessed central part located in the space between the wheels of the frame. 5. Forwarder according to claim 1, characterized in that protective screens (9) for the cab are installed on both half-frames (1), (2).

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