摘要:
The mechanism is used for rotating a tree-felling implement rotatably connected to a distal end of a boom of a logging vehicle by an implement pivot. The mechanism comprises a first arc-shaped member that extends in a plane perpendicular to the boom plane and is convex with reference to the implement pivot. The first member has a first end rotatably connected to the frame of the implement at a given distance from the implement pivot. A second arc-shaped member, coplanar with the first member, is also convex with reference to the implement pivot. The second member has a first end rotatably connected to the second end of the first member for defining an intermediary junction, and a second end rotatably connected to the distal end of the boom. A hydraulic actuator is mounted on the frame of the implement and has an end rotatably connected to or adjacent to the intermediary junction for rotating the implement during operation of the actuator. The mechanism provides a simple and reliable construction for rotating a tree-felling implement that is capable of rotating the implement with reference to the boom plane in both directions and according to a wide range of angles.
摘要:
The mechanism is used for rotating a tree-felling implement rotatably mounted with a pivot to the distal end of the boom of a logging vehicle. The mechanism, the tree-felling implement, the boom and the logging vehicle form a tree-felling machine controlled by an operator and used on logging sites. The mechanism has a pinion coaxial with the implement pivot and fixed in rotation with reference to the distal end of the boom. An arc-shaped rack is rotatably mounted on the frame of the implement by a rack pivot in spaced relationship with the pinion. The rack is in mesh with the pinion and hydraulic actuators are provided on the frame of the implement for swaying the rack and thereby rotating the implement with reference to the boom. Such mechanism is capable of rotating the tree-felling implement with reference to the boom plane in both directions and according to a much wider range angle than the prior art mechanisms.
摘要:
The mechanism is used for rotating a tree-felling implement rotatably connected to a distal end of a boom of a logging vehicle by an implement pivot. The mechanism comprises a pinion coaxial with the implement pivot and fixed in rotation with reference to the distal end of the boom. Two longitudinally extending actuators are mounted on the frame. Both actuators are lying in the pinion plane. Each actuator is adjacent to the pinion on a respective side thereof, namely right and left, and bears a corresponding sprocket coplanar with the pinion plane and rotatably connected to their free end. To link the elements together, there is provided a chain in mesh with the sprockets and the pinion. The chain has ends rigidly attached to the frame of the implement. In use, the implement is rotated as the actuators are operated in opposite directions. The mechanism provides a simple and reliable construction for rotating a tree-felling implement that is capable of rotating the implement with reference to the boom plane in both directions and according to a wide range of angles.
摘要:
A planing heads positioning device to be used with an automatic planing machine for planing sides of a piece of lumber moving along a travelling course is provided. The device includes a main frame and a planing assembly including first and second planing head arranged on opposite sides of the travelling course. The planning assembly further includes first and second supports respectively supporting the first and second planing heads. The first support is slidably mounted to the main frame, and the second support is operatively connected to the first support. The device also includes a primary positioning mechanism connected to the first support to position the planing assembly relative to the main frame; and a secondary positioning mechanism operatively connected to the supports to modify the planing width.
摘要:
A press roll device for applying pressure on a piece of wood moving along a path. The device has a frame mounted in proximity to the path of the piece of wood and a lower and an upper arm both pivotally connected to the frame. A roller is rotationally mounted on the end of the lower arm and a jack is resiliently connected to the corresponding end of the upper arm. A bag of compressed air is disposed between the ends of the lower and upper arm, resiliently separating the roller and the jack. In this manner, the bag of compressed air absorbs the vibration of the roller caused by unevenness in the piece of wood, at least partially.
摘要:
A planing head, cylindrical body for a planing head and a method of manufacture thereof are provided. The planing head includes a cylindrical body having an axis of rotation, an outer surface around the axis of rotation, and opposite first and second end faces. A plurality of blade assemblies is arranged along the outer surface. A plurality of grooves is provided in the outer surface and each groove is configured to receive a respective one of the plurality of blade assemblies. A hydraulic pressure system for supplying a hydraulic pressure to each of the blade assemblies is provided. The hydraulic pressure system includes a plurality of transverse channels for receiving a pressurised hydraulic fluid and a plurality of oblique channels hydraulically linking the plurality of transverse channels. Each transverse channel extends at least partially through the cylindrical body.
摘要:
An automated adjustment system is provided for positioning a speed reduction belt assembly to receive an elongated wood article exiting a processing machine. The speed reduction belt assembly has opposite first and second ends. The automated adjustment system includes a horizontal adjustment mechanism operable to adjust an angle of the speed reduction belt assembly in a horizontal plane. The automated adjustment system also includes a vertical adjustment mechanism operable to adjust the height of one of the first and second ends of the belt assembly relative to the other of the first and second ends of the belt assembly, thereby adjusting an inclination of the belt assembly. The automated adjustment system further includes a control unit in communication with the horizontal and vertical adjustment mechanisms for sending control signals thereto. The control signals determine the angle and inclination of the belt assembly.
摘要:
A planing head, cylindrical body for a planing head and a method of manufacture thereof are provided. The planing head includes a cylindrical body having an axis of rotation, an outer surface around the axis of rotation, and opposite first and second end faces. A plurality of blade assemblies is arranged along the outer surface. A plurality of grooves is provided in the outer surface and each groove is configured to receive a respective one of the plurality of blade assemblies. A hydraulic pressure system for supplying a hydraulic pressure to each of the blade assemblies is provided. The hydraulic pressure system includes a plurality of transverse channels for receiving a pressurised hydraulic fluid and a plurality of oblique channels hydraulically linking the plurality of transverse channels. Each transverse channel extends at least partially through the cylindrical body.
摘要:
A planing heads positioning device to be used with an automatic planing machine for planing sides of a piece of lumber moving along a travelling course is provided. The device includes a main frame and a planing assembly including first and second planing head arranged on opposite sides of the travelling course. The planning assembly further includes first and second supports respectively supporting the first and second planing heads. The first support is slidably mounted to the main frame, and the second support is operatively connected to the first support. The device also includes a primary positioning mechanism connected to the first support to position the planing assembly relative to the main frame; and a secondary positioning mechanism operatively connected to the supports to modify the planing width.
摘要:
The caterpillar track attachment is provided for a vehicle having a drive shaft and a steering mechanism. The attachment comprises a pair of endless caterpillar tracks for propelling the vehicle, a frame for supporting the vehicle, drive devices to be operatively connected to the drive shaft and engaging the tracks for transmitting motive power from the drive shaft to the tracks, and a hydraulic device to be coupled to the steering mechanism for providing at least one hydraulic fluid outlet controlled by commands from the steering mechanism. The frame has securing devices for connecting the vehicle onto the frame, and a pair of spaced apart elongated side members around which the tracks are respectively mounted. Each of the members has front and rear sets of wheels located substantially at its front and rear extremities for guiding therearound the corresponding track, and straight slides located at its lower portion between the corresponding rear and front sets of wheels for guiding the corresponding track. The attachment can be adapted to the vehicle by connecting operatively the drive devices to the drive shaft, by connecting the frame to the vehicle by the securing devices, and by coupling the steering mechanism to the hydraulic device.