52results about How to "Low ground pressure" patented technology

The invention provides a pneumatic tire in which a narrow groove extending in a tire circumferential direction is formed in a shoulder land portion of a tread, and which is excellent in a groove bottom crack resistance, a tear resistance and an irregular wear resistance. In the pneumatic tire where a narrow groove (3) which extends in a tire circumferential direction and is formed in a shoulder land portion of a tread (10), an inside concave curved surface (41) and an outside concave curved surface (42) are formed in a groove bottom portion of the narrow groove (3), the inside concave curved surface (41) being formed by depressing a groove wall in a tread center side, and the outside concave curved surface (42) being formed by depressing a groove wall in a tread end TE side, wherein an inner surface of the groove bottom portion including the inside concave curved surface (41) and the outside concave curved surface (42) is formed by a single circular arc in a tire meridian cross section, and wherein a radius of curvature (R) of the circular arc is equal to or larger than a width (W) of an opening portion of the narrow groove.

The invention relates to a structurally improved crop straw harvesting baler, which comprises a frame, a header, a conveying chute, a longitudinal feed mechanism, a forming chamber, a baling and knotting device, a control table and a power system. The power system is disposed at the tail of the overall baler, other components are all disposed on a frame chassis, and a reel and a cutter are installed on the header. The structurally improved crop straw harvesting baler is characterized in that the chassis is a self-propelled crawler chassis, and self-propelling tracks are installed on the chassis. Using the chassis overcomes the shortages of a tractive baler, and integral operation is achieved. By means of the self-propelling tracks, land contact area is large, land contact pressure is low, soil settlement is avoided, performances are stable, reliability is high, travelling resistance is small, climbing performance is high, disassembly and assembly is easy, and cross-field movement is convenient. The structurally improved crop straw harvesting baler has the advantages that appearance is compact and small, conveying capacity is high, slipping is less apt to occur, adaptability to landforms is high, the structurally improved crop straw harvesting baler can be used for harvesting various types of straws, and the like. The structurally improved crop straw harvesting baler is applicable to landforms of most areas of China and harvesting of crop straws.

The present invention improves steering stability performance on dry road surfaces and steering stability performance on wet road surfaces. The land part width Wcc of a center land part 31 and the land part width Wco of an outer-side middle land part 32 satisfy the relationship Wcc<Wco. Additionally, contact surfaces 10 of each of the outer-side middle land part 32 and an outer-side shoulder landpart 34 are formed so as to protrude outward in the tire radial direction with respect to reference profiles PRco, PRso, and the protrusion amount Hco of the outer-side middle land part 32 and the protrusion amount Hso of the outer-side shoulder land part 34 satisfy the relationship Hco<Hso.

The invention discloses a honeycomb type ginger planting punching machine which comprises a rack, a walking device, a power device, a transmission, a universal shaft, a machine tool, a machine tool suspending device, a manipulation component, a hydraulic component and a ground wheel component, wherein the rack is connected with the walking device and is arranged on the walking device; the power device is connected with the transmission and the hydraulic component; the transmission is connected with the walking device; the universal shaft is connected with the transmission and the rack; the machine tool is connected with the machine tool suspending device; the manipulation component is fixedly arranged on the shell of the transmission; the power device, the transmission, the machine tool suspending device, the hydraulic component and the ground wheel component are arranged on the rack. The honeycomb type ginger planting punching machine takes manipulation mistakes caused by artificial factors into account and is applicable to hilly and mountainous regions, honeycomb caves can be punched, cave perpendicularity and hole shape completeness are ensured, hole openings are solid, the punching working efficiency is improved, and the working intensity of operators is alleviated.

The invention discloses a ride-type two-wheel driven transplanter which comprises a frame, an engine, a transmission case, an operating mechanism, a driving wheel, a transplanting operating mechanism and a conveying wheel. The engine and the transmission case are fixedly arranged on the frame. The engine and the transplanting operating mechanism are respectively connected with the transmission case by transmission mechanisms. The operating mechanism comprises a seat, a leftward-steering operating bar and a rightward-steering operating bar. The seat is arranged on the frame. The leftward-steering operating bar and the rightward-steering operating bar are arranged on the frame and connected with the transmission case by corresponding steering clutch cables. Driving wheels include a left driving wheel and a right driving wheel which are respectively connected with the transmission case by corresponding driving wheel chains. The transplanting operating mechanism is connected with a transplanter hooking bracket which is connected with the frame. The ride-type two-wheel driven transplanter has the advantages that weight is supported by two front wheels and a rear floating plate so that the transplanter is not easy to be trapped into mud, and mud retaining at the rear floating plate is greatly reduced so that the performance of the transplanter and the transplanting quality are improved.