47results about How to "Long telescoping distance" patented technology

The invention discloses an adjustable lifting platform used in aerial work for line construction. The adjustable lifting platform comprises an insulation movable base, a lifting support, a primary lifting device, a secondary lifting device and an operation platform, wherein a driving traveling wheel, a universal driven traveling wheel and a brushless hub motor are arranged on the bottom of the insulation movable base, the driving traveling wheel and the universal driven traveling wheel are both connected with the brushless hub motor, the lifting support is in the shape of a reversed U and fixedly arranged at the upper end of the insulation movable base, the primary lifting device is arranged on the inner side of the lifting support, the secondary lifting device is arranged above the primary lifting device, the operation platform is fixedly arranged at the upper end of the secondary lifting device, guardrails are arranged around the operation platform, a tool accommodating table is arranged on the operation platform, and a controller is arranged on the tool accommodating table. The adjustable lifting platform is novel in structural design, convenient to operate, and capable of achieving two-stage lifting and improving line construction efficiency, a constructor can operate the controller alone to achieve lifting, rotation and movement, and using is quite convenient.

The invention discloses a multi-stage sliding telescopic arm. The multi-stage sliding telescopic arm comprises a basic arm and N telescopic arms, wherein the N telescopic arms comprise a first-stage telescopic arm, a second-stage telescopic arm, and the like, and an Nth-stage telescopic arm; the first-stage telescopic arm is arranged on the basic arm; the second-stage telescopic arm is nested and slides in the first-stage telescopic arm; the Nth-stage telescopic arm is nested and slides in the (N-1)th-stage telescopic arm; sliding assemblies are arranged between the basic arm and the first-stage telescopic arm, between the first-stage telescopic arm and the second-stage telescopic arm and between the (N-1)th-stage telescopic arm and the Nth-stage telescopic arm; and synchronization assemblies are arranged between the first-stage telescopic arm and the second-stage telescopic arm and between the (N-1)th-stage telescopic arm and the Nth-stage telescopic arm. The multi-stage sliding telescopic arm has the advantages that the effective telescopic distance is long, and the number of stages of the telescopic arms can be increased according to needs.

The invention discloses a secondary jacking-up device which comprises a substrate (1). The secondary jacking-up device is characterized in that at least two primary jacking-up elements (2) are arranged on the substrate (1); a working end of each primary jacking-up element (2) is connected with a concave uplifting frame (3); a secondary jacking-up element (5) is arranged in a groove (4) of the concave uplifting frame (3); guide plates (6) are further arranged on two sides of the concave uplifting frame (3); guide holes (7) in shapes matched with the primary jacking-up elements (2) are formed on the guide plates (6); and auxiliary guide plates (8) matched with the primary jacking-up elements (2) are further arranged on the side surfaces of the concave uplifting frame (3). The secondary jacking-up device has the advantages of simple structure, ingenious design, little space occupation and long extension distance, and can acquire an extension distance exceeding the self length of the secondary jacking-up device.

The invention discloses a combined type hydraulic cylinder with a floating cylinder barrel. The combined type hydraulic cylinder comprises an oil inlet end piston rod, a combined type cylinder barrel and a non-oil inlet end piston rod, wherein the oil inlet end piston rod and the non-oil inlet end piston rod are respectively combined with an oil inlet end cylinder barrel and a non-oil inlet end cylinder barrel to form an oil inlet end hydraulic cylinder and a non-oil inlet end hydraulic cylinder; a large cavity oil port and a small cavity oil port which are respectively communicated with a large cavity and a small cavity of the oil inlet end cylinder barrel are respectively formed in the oil inlet end piston rod; a large cavity oil pipe is communicated with the large cavities of the oil inlet end cylinder barrel and the non-oil inlet cylinder barrel; and a small cavity oil pipe is communicated with the small cavities of the oil inlet end cylinder barrel and the non-oil inlet cylinder barrel. According to the combined type hydraulic cylinder with the floating cylinder barrel, the design of the hydraulic oil cylinders is optimized, so that two hydraulic oil cylinders with relatively small travels are connected in series with each other; by a mode of feeding oil through cylinder rods, the combined type hydraulic cylinder can telescopically move in two directions; an oil cylinder telescopic amount with relatively high amplitude is realized when a mounting size is relatively small; and therefore, a telescopic amount which is one time higher than that of the common hydraulic cylinder can be realized.