Riding lawn mower with connecting device

1. A riding lawn mower comprising:

a frame, a mowing device, the mowing device mounted to a bottom of the frame, a functional unit attached to a front of the frame, and a motor group together with a power supply mounted to the frame, wherein the riding lawn mower also comprises a connecting device connecting the frame and the functional unit, the connecting device comprising a first connector attached on the front of the frame, a second connector attached to the functional unit, and a third connector adapted for fixedly connecting the first connector and the second connector, the first connector and the second connector respectively defining through-holes thereon, the third connector extending through the through-holes of the first and the second connectors to fixedly connect the first and the second connectors;

wherein the connecting device also comprises a buckle piece provided on a top of the front of the frame and a fastener piece provided on the functional unit, the buckle piece engaging with the fastener piece to securely connect the frame and the functional unit.

2. The riding lawn mower as claimed in claim 1 , wherein the first connector provides a receiving slot, and one end of the second connector is retained in the receiving slot.

3. The riding lawn mower as claimed in claim 2 , wherein both the first connector and the second connector are square, and the receiving slot is square correspondingly.

4. The riding lawn mower as claimed in claim 1 , wherein the through-holes comprise a first through-hole defined on the first connector and a second through-hole defined on the second connector, the first through-hole extending through-out the first connector and the second through-hole extending through-out the second connector.

5. The riding lawn mower as claimed in claim 4 , wherein the third connector is a fixed pin that passes through the first through-hole and the second through-hole sequentially.

6. A riding lawn mower comprising:

a frame, a mowing device, the mowing device mounted to a bottom of the frame, a functional unit attached to a front of the frame, and a motor group together with a power supply mounted to the frame, wherein the riding lawn mower also comprises a connecting device connecting the frame and the functional unit, the connecting device comprising a first connector attached on the front of the frame, a second connector attached to the functional unit, and a third connector adapted for fixedly connecting the first connector and the second connector, the first connector and the second connector respectively defining through-holes thereon, the third connector extending through the through-holes of the first and the second connectors to fixedly connect the first and the second connectors, wherein the connecting device further comprises a reinforcing plate with one end thereof fastened to the front of the frame and the other end thereof fastened to the functional unit, the reinforcing plate positioned at a bottom of the first connector and the second connector.

7. The riding lawn mower as claimed in claim 1 , wherein the connecting device further comprises an electrical interface provided on the front of the frame, the electrical interface having one end electrically connecting to the power supply and the other end connecting to the functional unit, so as to provide power to the functional unit.

8. The riding lawn mower as claimed in claim 7 , wherein the first connector is arranged in a middle of the front of the frame and the electrical interface is located besides the first connector.

9. The riding lawn mower as claimed in claim 1 , wherein the functional unit is one of a snow blower, snow thrower, snow plow, and jack.