A system includes a crane and an exchangeable tool. The crane and the tool respectively, include an upper tool connector with tool retainers and a lower tool connector which can be interconnected, e.g. a male and female connector, e.g. the lower tool connector of the tool being embodied as a shank provided with a shoulder and the upper tool connector as a tool clamp with a female, open-centered body. A tool suspension device includes the upper tool connector and a travelling block member. The tool clamp has multiple mobile tool retainers adapted toin a non-operative positionallow introduction of the shank of the tool from below into the shank receiving passage andin an operative positionengage below the shoulder of the shank that has been introduced into the passage so as to suspend the tool. The upper tool connector may include a bearing allowing for swivelling of the open-centered body, and e.g. a rotational drive operative between the clamp housing and the female, open-centered body to actively drive said swivelling.

A system includes a crane and an exchangeable tool. The crane and the tool respectively, include an upper tool connector with tool retainers and a lower tool connector which can be interconnected, e.g. a male and female connector, e.g. the lower tool connector of the tool being embodied as a shank provided with a shoulder and the upper tool connector as a tool clamp with a female, open-centered body. A tool suspension device includes the upper tool connector and a travelling block member. The tool clamp has multiple mobile tool retainers adapted toin a non-operative positionallow introduction of the shank of the tool from below into the shank receiving passage andin an operative positionengage below the shoulder of the shank that has been introduced into the passage so as to suspend the tool. The upper tool connector may include a bearing allowing for swivelling of the open-centered body, and e.g. a rotational drive operative between the clamp housing and the female, open-centered body to actively drive said swivelling.

A crawler crane includes a lower traveling body, and the lower traveling body includes: a car body; a right crawler device and a left crawler device; a front side connecting portion; and a rear side connecting portion, the right crawler device includes a right crawler frame, the left crawler device includes a left crawler frame, the front side connecting portion is separably joined to each of a front end portion of the car body, the right crawler frame front portion and the left crawler frame front portion, the rear side connecting portion is separably joined to each of a rear end portion of the car body, the right crawler frame rear portion and the left crawler frame rear portion, and each of the front side connecting portion and the rear side connecting portion includes a lattice portion which has a lattice structure.

A crawler crane includes a lower traveling body, and the lower traveling body includes: a car body; a right crawler device and a left crawler device; a front side connecting portion; and a rear side connecting portion, the right crawler device includes a right crawler frame, the left crawler device includes a left crawler frame, the front side connecting portion is separably joined to each of a front end portion of the car body, the right crawler frame front portion and the left crawler frame front portion, the rear side connecting portion is separably joined to each of a rear end portion of the car body, the right crawler frame rear portion and the left crawler frame rear portion, and each of the front side connecting portion and the rear side connecting portion includes a lattice portion which has a lattice structure.

A working machine with a crawler includes a lower traveling body having a pair of crawlers, an upper turning body, an extension beam installed rotatably to be parallel in a longitudinal direction of the crawler, a fitting portion opened in a side frame of the crawler, a fixing pin fixing the extension beam to the side frame, a fixing pin insertion hole, a fixing pin fitting hole, and a reinforcement rib, in which the extension beam extends to be inserted into the fitting portion, and the reinforcement rib is provided at a center portion of an opening of the fitting portion, and the fixing pin fitting hole is disposed at a position which is deviated from an imaginary center line extending along a longitudinal direction of the fitting portion from the center portion and does not interfere with the reinforcement rib.

Provided is a swingable connection structure capable of detachably connecting a first member and a second member to each other easily. The swingable connection structure has a first member, a second member, and a swing holding member, and the second member is swingably connected to the first member. The first member has a swing shaft which defines a swing center axis of the second member, and the second member has a pivotally supported portion which receives the swing shaft. The swing holding member is mounted on a side surface of the second member in a rotatable manner, and the swing holding member is provided with a constraining hole which allows insertion of one end portion of the swing shaft received by the pivotally supported portion.

Provided is a swingable connection structure capable of detachably connecting a first member and a second member to each other easily. The swingable connection structure has a first member, a second member, and a swing holding member, and the second member is swingably connected to the first member. The first member has a swing shaft which defines a swing center axis of the second member, and the second member has a pivotally supported portion which receives the swing shaft. The swing holding member is mounted on a side surface of the second member in a rotatable manner, and the swing holding member is provided with a constraining hole which allows insertion of one end portion of the swing shaft received by the pivotally supported portion.

Components and systems for a flexible tensioning member for construction equipment. A tensioning member is comprised of a fiber having a specific tensile strength greater than 1,000 kilonewton meters per kilogram. The tensioning member connects two components and has an attachment allowing the tensioning member to flex relative to a component. The attachment may provide a system for connecting multiple tensioning members.

Components and systems for a flexible tensioning member for construction equipment. A tensioning member is comprised of a fiber having a specific tensile strength greater than 1,000 kilonewton meters per kilogram. The tensioning member connects two components and has an attachment allowing the tensioning member to flex relative to a component. The attachment may provide a system for connecting multiple tensioning members.

The present invention relates to a telescopic device of single-cylinder latch type and a crane. The telescopic device of single-cylinder latch type is applied to a telescopic boom system and includes: a telescopic cylinder, for driving telescopic boom sections of the telescopic boom system to execute a telescopic action relative to a basic boom section; double boom pin structures, arranged on both sides of the tails of the telescopic boom sections to lock and unlock the telescopic boom sections; an boom pin pulling and plugging mechanism, arranged on the cylinder barrel of the telescopic cylinder to execute pulling and plugging operations on the double boom pin structures; and a cylinder pin structure and a cylinder pin cylinder, both arranged on the cylinder barrel of the telescopic cylinder and to lock and unlock the cylinder barrel of the telescopic cylinder and the telescopic boom sections. In the present invention, the double boom pin structures are arranged on both sides of the tails of the telescopic boom sections, compared with the existing upper boom pin solution, the double boom pin structures in the present invention are arranged on both sides of the telescopic boom sections, so that the stress is more uniform compared with a structure which is singly arranged on the upper side of a telescopic boom, and the influence of flexural deformation of a telescopic boom on the position of a pin hole and the stress of an boom pin is reduced.