The utility model discloses a self-lubricating gear shaft. The self-lubricating gear shaft comprises a gear shaft main body, multiple oil inlets, an oil storage groove, multiple connecting gears, multiple bearing connecting parts and multiple threaded holes, wherein the bearing connecting parts are machined on the two ends of the gear shaft main body, the two oil inlets are formed in the surface of the gear shaft main body, the connecting gears are arranged on the two ends of the gear shaft main body, the oil storage groove is formed in the gear shaft main body and goes to the centers of the connecting gears, and the threaded holes are formed in the bearing connecting parts. In the manner, the self-lubricating gear shaft provided by the utility model has the advantage that the oil storage groove is formed in the gear shaft, so that the gear shaft can be automatically lubricated, and the flexibility of the gear shaft can be ensured.

Self-lubricating gear shaft

The invention provides an improved transmission of agricultural machinery. The improved transmission comprises a gearbox casing assembly, a sliding gear shaft assembly, a fixed gear shaft assembly, a steering system assembly, a clutch system assembly, a bridging gear shaft system, a left half shaft system assembly, a right half shaft system assembly, a steering shifting fork system assembly, a variable-speed shaft system assembly and a variable-speed rocker arm system assembly, wherein the clutch system assembly comprises copper shaft sleeves and axial limiting structures; and oil grooves which are formed in a crossed manner are formed in the copper shaft sleeves. According to the improved transmission of agricultural machinery, involute splines are adopted for shaft connection, the axial limiting structures are arranged, so that moving is prevented, the processing cost is lower, the bearing capacity is high, the automatic centering is easy, the mounting accuracy is high, and the reliability of sealing structures at shaft ends is higher; and the transmission of agricultural machinery is applicable to agricultural machinery like harvesters, and is high in utilization intensity, high in reliability and convenient to maintain.

Improved transmission of agricultural machinery

The invention discloses a super creeper-gear gearbox. The super creeper-gear gearbox comprises a gearbox body, a bearing installed in the gearbox body, an output shaft installed in the bearing and a super crawler connected with the gearbox body and positioned by the bearing. The gearbox body is connected with the super crawler through screws and threads. An inner and outer engaging sleeve for gearshifting is installed into the super crawler. When the super crawler penetrates the output shaft and is connected with a tractor gearbox shell together, the output shaft serves as a power source to drive the super crawler to work. When an input shaft rotates, the super crawler rotates in the same direction at the extremely low rotation speed. When an inner spline of the inner and outer engaging sleeve is combined with an outer spline on the input shaft, a tractor runs in the normal gear position; when an outer spline of the inner and outer engaging sleeve is combined with an inner spline of the super crawler, the tractor runs at the ultra-low creeping speed; and when the engine works at the rated speed, the running speed of the tractor ranges from 0.1 Km/h to 35 Km/h, ultra-low creeping is realized, and the production needs of users are met.

Super creeper-gear gearbox

The utility model particularly relates to a power output mechanical device for a tractor. The power output mechanical device mainly comprises a power output transmission shaft, a low-gear driving gear, a high-gear driving gear, a high-gear driven gear, a low-gear driven gear, a power output intermediate shaft, a power output shaft and the like, wherein the power output transmission shaft is connected with the low-gear driving gear and the high-gear driving gear through an involute spline; the involute spline has a modulus of 2.5mm, 15 teeth, a major diameter of phi40 -0.337mm and a minor diameter of phi33.75 -0.337mm; each of the low-gear driving gear, the high-gear driving gear, the high-gear driven gear and the low-gear driven gear has a pressure angle of 25 degrees; and the power output shaft is an eight-tooth rectangular spline, and the eight-tooth rectangular spline has a tooth width of 7.98 -0.11mm, a major diameter of phi48 -0.087mm and a minor diameter of phi40 -0.1mm. The strength of each of the gears and the shafts is strengthened, and a center distance and a transmission ratio are not required to be redesigned and changed; and the power output mechanical device is particularly suitable for solving the problem of tooth breakage caused by the weak roots of the gears, and has the characteristics of easiness for implementation and high universality.

Power output mechanical device for tractor

The utility model relates to a 36-gear speed-changing box of a tractor. The 36-gear speed-changing box of the tractor comprises a main speed-changing transmission mechanism, an auxiliary speed-changing transmission mechanism and a creeper gear transmission mechanism, wherein the main speed-changing transmission mechanism is provided with four pair of transmission gears and realizes four-gear speed change; the auxiliary speed-changing transmission mechanism is in a combination type of three gears, i.e. a high gear, a low gear and a reverse gear; the creeper gear transmission mechanism is in duplex planet gear transmission and realizes the speed change of three gears, i.e. the high gear, the low gear and a creeper gear; the main speed-changing transmission mechanism mainly comprises an input shaft, an intermediate shaft and parts positioned on the shafts; the auxiliary speed-changing transmission mechanism mainly comprises an auxiliary speed-changing intermediate shaft, an output shaft, a reverse gear shaft, a reverse idler gear assembly, an auxiliary speed-changing low gear and a reverse gear driven gear; and the creeper gear transmission mechanism mainly comprises a duplex planet gear, a planet carrier, a creeper gear ring gear, an auxiliary speed-changing ring gear assembly and a creeper gear combination sleeve. The utility model has the advantages of compact structure, good universality and high practicability.

Hu Yadong

Papers

Power output mechanical device for tractor

36-gear speed-changing box of tractor