Brake handle device and electric tractor

An electric tractor, comprising:

• an electric tractor body, wherein the electric tractor body comprises a driving motor, a wheel assembly, a power supply and a frame;
• the wheel assembly is connected with the driving motor;
• the driving motor is used for driving the wheel assembly to rotate;
• the power supply is electrically connectable with the driving motor, and is used for supplying power to the driving motor;
• the frame is connected to the wheel assembly;
• and the frame is provided with a handlebar;
• and
• a brake handle device, wherein the brake handle device comprises:
• a seat body, which is arranged at the position of the handlebar of the frame;
• a microswitch, which is electrically connected with the driving motor and the power supply and comprises a main body part and a braking part, wherein the main body part is arranged on the seat body;
• the braking part extends into the main body part and can elastically expand and contract relative to the main body part;
• a wrench, which is rotatably arranged on the seat body and can be abutted against the braking part;
• and
• an elastic piece, which is a tension spring arranged on the seat body, is connected with the wrench, and is used for providing an elastic force for the wrench to drive the wrench to rotate and reset in the direction far from the handlebar, wherein the wrench is held to drive the wrench to rotate in the direction close to the handlebar, so that the wrench presses the braking part into the main body part for a preset length, thereby controlling the microswitch to conduct the electric connection between the power supply and the driving motor;
• and the wrench is released to make the wrench rotate and reset in the direction far from the handlebar under the driving of the elastic force of the elastic piece and to separate the wrench from the braking part, so that the braking part is elastically reset relative to the main body part, thereby further controlling the microswitch to disconnect the electric connection between the power supply and the driving motor;
• and
• a rotating shaft, wherein the wrench is rotatably connected with the seat body by the rotating shaft;
• wherein the wrench comprises:
• a cam, which is rotatably arranged on the seat body, is connected with the elastic piece through a lug, and is abutted against the braking part;
• and
• a holding part, which is connected with the cam and is configured for a user to apply a holding force to the wrench;
• a first end of the elastic piece is sleeved on the lug, and a second end of the elastic piece is sleeved on a suspension lug arranged on the seat body;
• wherein the holding part is configured to extend out of the seat body;
• and from an “off” position of the microswitch to a fully-on position of the microswitch, a rotation angle of the holding part is less than 90°.