초록 ▼

The invention is a self-propelled drivewheel steering power mower which can be operated in a standing or sitting position, including a pair of variable flow hydrostatic pumps with tiltable swash plates, each of which drives one of a pair of drivewheels. A vertically mounted steering shaft is rotatab

The invention is a self-propelled drivewheel steering power mower which can be operated in a standing or sitting position, including a pair of variable flow hydrostatic pumps with tiltable swash plates, each of which drives one of a pair of drivewheels. A vertically mounted steering shaft is rotatably supported on the mower for rotation about an axis concentric with said shaft; and a T-shaped steering handle bar is rotatably journaled to the end of said steering shaft for twisting about an axis concentric with said handle bar. A first pair of connecting rods connects the steering shaft to the swash plate of each variable flow pump whereby rotation of the steering shaft in one direction will increase the flow rate to one of the variable flow pumps while decreasing the flow rate proportionately to the other variable flow pump to effect steering right or left; and a second connecting rod connects the steering handle bar to the first pair of connecting rods whereby twisting of the handle bar in one direction increases the flow rate proportionally to both variable flow pumps while twisting in the opposite direction decreases the flow rate proportionally to both variable flow pumps to effect acceleration and deceleration of the mower.

대표청구항 ▼

[ We claim:] [1.] A self-propelled drivewheel steering power mower capable of a zero turning radius by its operator, the mower comprising:a frame;an engine mounted on the frame;a pair of variable flow hydrostatic pumps driven by said engine each having tiltable swash plates with a zero flow neutral

[ We claim:] [1.] A self-propelled drivewheel steering power mower capable of a zero turning radius by its operator, the mower comprising:a frame;an engine mounted on the frame;a pair of variable flow hydrostatic pumps driven by said engine each having tiltable swash plates with a zero flow neutral position;at least one cutting blade rotatably mounted on said frame driven by said engine;first and second drivewheels each independently driveable in both forward and rearward directions at variable speeds on separate axles for driving and steering said mower;first and second hydrolic motors mounted on said frame connected to said first and second drivewheels;a vertically mounted steering shaft rotatably supported by a bearing on said frame for rotation about an axis concentric with said shaft;a T-shaped steering handle bar rotatably journaled to the end of said steering shaft for rotation about an axis concentric with said handle bar;a first pair of connecting rods connecting the lower end of the steering shaft to the swash plate of each variable flow pump whereby rotation of the steering shaft in one direction will increase the flow rate to one of the following variable flow pumps while decreasing the flow rate proportionately to the other variable flow pump; anda second connecting rod connection the steering handle bar to said first pair of connecting rods whereby rotation of the T-shaped handle bar in the direction increases the flow rate proportionallyto both variable flow pumps while rotation in the opposite direction decreases thr flow rate proportionally to both variable flow pumps.