A mining or construction vehicle comprising an extendable boom comprised of a first and a second telescopic section extending in a longitudinal direction, wherein the first telescopic section is arranged to be connected to the mining or construction vehicle and a hydraulic device is arranged to be connected to a mounting device at a free end of the second telescopic section, wherein a hydraulic cylinder is arranged in connection to the extendable boom to govern extension of said extendable boom. Hydraulic conduit for supply of hydraulic fluid to the hydraulic device on the mounting device are arranged through the length of the extendable boom.

A multi-process machine suspension device is equipped with two hydraulic cylinders for rotating the machine relative to an arm supporting it. One cylinder is pivoted to another arm and the other cylinder to the machine frame. Both cylinders are pivoted by one end to a freely rotating intermediate arm pivoted to the same frame joint as the arm supporting it.

A multi-process machine suspension device is equipped with two hydraulic cylinders for rotating the machine relative to an arm supporting it. One cylinder is pivoted to another arm and the other cylinder to the machine frame. Both cylinders are pivoted by one end to a freely rotating intermediate arm pivoted to the same frame joint as the arm supporting it.

The invention discloses a mining crane which is easy to install, and includes a base which is symmetrical in front and back. A support column is fixed on the upper end surface of the base, and a fixed block is fixed on the upper end of the support column. The fixed block, the support column and A traveling device is arranged between the bases, and the traveling device includes four rotatable traveling wheels. When the traveling wheels rotate, the fixed block is moved, and a lifting device is provided in the fixed block. The heavy device includes a rewindable hook for lifting the heavy ore. The traveling device can drive the whole to adjust the installation position through the traveling device. The device has two installation and support methods that can directly abut the mine wall and drill into the mine wall. According to the actual situation of the mine and mining area, it can be reasonably selected to expand its scope of application, without being restricted by the region. Secondly, the support rod and telescopic rod can be contracted and rotated to reduce the overall volume of the present invention, which is convenient for movement and handling, and convenient for loading and unloading.

The invention discloses a mining crane which is easy to install, and includes a base which is symmetrical in front and back. A support column is fixed on the upper end surface of the base, and a fixed block is fixed on the upper end of the support column. The fixed block, the support column and A traveling device is arranged between the bases, and the traveling device includes four rotatable traveling wheels. When the traveling wheels rotate, the fixed block is moved, and a lifting device is provided in the fixed block. The heavy device includes a rewindable hook for lifting the heavy ore. The traveling device can drive the whole to adjust the installation position through the traveling device. The device has two installation and support methods that can directly abut the mine wall and drill into the mine wall. According to the actual situation of the mine and mining area, it can be reasonably selected to expand its scope of application, without being restricted by the region. Secondly, the support rod and telescopic rod can be contracted and rotated to reduce the overall volume of the present invention, which is convenient for movement and handling, and convenient for loading and unloading.

A common connection apparatus for coupling a power tool to an extensible arm and a power supply, the apparatus including a tool support base designed to support a tool, and a power supply support base designed to be affixed to the end of the extensible arm. The tool support base and the power supply support base each include a plurality of power connectors, positioned for engagement when the bases are aligned. The tool support base also has an alignment stab, which is received within a channel of the power supply support base. A plurality of pins are further positioned on the tool support base, to be received in apertures of the power supply support base. By this configuration, the bases may be aligned and engaged, facilitating the transmission of power from the machinery to which the arm is affixed, to the tool.

A common connection apparatus for coupling a power tool to an extensible arm and a power supply, the apparatus including a tool support base designed to support a tool, and a power supply support base designed to be affixed to the end of the extensible arm. The tool support base and the power supply support base each include a plurality of power connectors, positioned for engagement when the bases are aligned. The tool support base also has an alignment stab, which is received within a channel of the power supply support base. A plurality of pins are further positioned on the tool support base, to be received in apertures of the power supply support base. By this configuration, the bases may be aligned and engaged, facilitating the transmission of power from the machinery to which the arm is affixed, to the tool.

A link member of a gripping assembly, which is suitable for weighing of each load during reloading, may include a rotatable gripping assembly or similar appliance mounted on the arm of a hydraulic crane, which is suitable for mounting onto a motor vehicle and then for manipulating with each load, the weight of which can be measuring during said manipulating. The link member may be provided by modifying a known link member, which is generally used for attachment of each gripping assembly, together with a rotator, to each crane arm, such that in addition to the attachment of the gripping assembly the link member may enable weighing of each load during each manipulating therewith by means of the crane and each gripping assembly, wherein the determining of each weight of the load may be performed precisely and accurately despite to movement and rotation of the load.

A link member of a gripping assembly, which is suitable for weighing of each load during reloading, may include a rotatable gripping assembly or similar appliance mounted on the arm of a hydraulic crane, which is suitable for mounting onto a motor vehicle and then for manipulating with each load, the weight of which can be measuring during said manipulating. The link member may be provided by modifying a known link member, which is generally used for attachment of each gripping assembly, together with a rotator, to each crane arm, such that in addition to the attachment of the gripping assembly the link member may enable weighing of each load during each manipulating therewith by means of the crane and each gripping assembly, wherein the determining of each weight of the load may be performed precisely and accurately despite to movement and rotation of the load.

A container spreader for coupling a container with a hoisting installation has a number of assemblies of a guiding plate and a displacing device connected thereto, for displacing the guiding plate between an active position A and an inactive position B. The displacement device has a hydraulic swivel motor provided with an output shaft which is connected to the guide plate via connecting elements. A hydraulic unit is coupled to the swivel motor via coupling device for supplying and discharging hydraulic oil from and to the swivel motor. By applying a hydraulic swivel motor, a final transmission can be omitted and no valves are required for keeping the hydraulic motor at pressure. As a result, an energy-efficient and inexpensive assembly has been obtained.