5 results about "Cross country" patented technology

The utility model discloses a novel chain guide assembly for a bicycle derailleur, which comprises a guide plate, a transmission part, a transmission part fixing cap, an upper guide wheel and a lower guide wheel, the lower guide wheel comprises a lower guide wheel body, a first lower guide wheel bearing protection pressing end cover, a lower guide wheel rotating bearing and a second lower guide wheel bearing protection pressing end cover. According to the chain guide assembly, the problems that environmental pollutants such as silt, rainwater and liquid enter a guide wheel system to cause speed change failure and even chain separation and the like of an existing chain guide assembly are solved, and a rider can have a lighter and more comfortable riding feeling; and meanwhile, the lower guide wheel main body can be freely switched in different road condition scenes such as leisure riding, mountain cross-country, daily training or competition field racing, so that the speed control system can obtain the optimal working condition.

The utility model relates to the technical field of forklifts, in particular to a detachable overhead guard of a cross-country forklift, a main guard and an auxiliary guard of the detachable overhead guard are mounted on the forklift, when an overhead frame assembly needs to be opened, a worker enables a clamping assembly to release clamping of the overhead frame assembly, the worker opens the overhead frame assembly, and after use, the overhead frame assembly can be detached from the main guard and the auxiliary guard. The top frame assembly has a free closing function, after the top frame assembly is closed, the clamping assembly automatically clamps the top frame assembly, and firmness is improved; comprising main protection frames and auxiliary protection frames, each main protection frame is provided with one auxiliary protection frame, the device further comprises a top frame assembly and a clamping assembly, the top frame assembly is installed at the top ends of the two main protection frames, the clamping assembly is installed at the top ends of the two main protection frames, and the clamping assembly clamps the top frame assembly.

The utility model relates to the technical field of antiskid chains, in particular to an antiskid chain with high antiskid performance, which comprises a side chain, a steel wire rope component and a transition chain, and the steel wire rope component is parallel to the side chain; the transition chain is arranged between the side chain and the steel wire rope assembly, the transition chain comprises a plurality of chains and circular rings, and the chains are connected in a staggered mode through the circular rings; according to the technical scheme, the P-type rings are arranged on the transition chain, the P-type rings can be used as icebreaking rings, the friction performance of the antiskid chain is greatly improved, the road holding force of the antiskid chain is more excellent, the performance of the antiskid chain is better, and the off-road vehicle can stably hold the ground on the ice and snow ground more easily.

The utility model discloses a variable stiffness and variable damping nitrogen shock absorber assembly which comprises an upper support, the upper support is connected to a nitrogen shock absorber through a variable stiffness spring, the nitrogen shock absorber comprises a piston rod, a nitrogen cylinder and an oil cylinder, the top of the oil cylinder is provided with a stretching tail end hydraulic cavity, and the bottom of the oil cylinder is provided with a compression tail end hydraulic cavity. The bottom end of the piston rod extends into the oil cylinder, a stretching tail end limiting valve, a middle-position piston valve and a compression tail end limiting valve are arranged at the bottom end of the piston rod, when a vehicle runs on a smooth road surface, the shock absorber moves in the middle, only the middle-position piston valve plays a role, the shock absorber outputs small damping and is soft in filter vibration, and when the vehicle runs on large fluctuating road surfaces such as cross country and the like, the shock absorber is not prone to falling off. The shock absorber can run to the compression tail end and the stretching tail end, when the compression tail end limiting valve and the compression tail end cavity are closed, the damper is jointly composed of the compression tail end limiting valve and the middle-position piston valve, the shock absorber outputs large damping, a suspension is hardened, strong support can be provided for a vehicle, and the stability of a vehicle body is guaranteed.