Ratchet parking brake device for wheeled tractors

Abstract

The invention relates to a ratchet wheel parking braking device of a roller tractor. A limiting plate is provided with a guide groove, and an operating lever of a rocker arm assembly penetrates through the guide groove in the limiting plate to be hinged to a rocker arm shaft. An upper pin fixed on a rocker arm is arranged in a sliding chute of a hinged plate, the lower side of the hinged plate is hinged to a disk body of a camshaft through a lower pin, and the two ends of a first torsional spring are connected to the upper pin and the lower pin respectively. A cam, a parking braking stop block and a parking braking removing stop block are arranged on the end face of the disk body of the camshaft. A ratchet matched with a gear is arranged on the front upper portion of a ratchet wheel base on a ratchet wheel assembly, and the lower portion of the ratchet wheel base is arranged on a fixed shaft in a sleeved mode. The outer circumference of an idler wheel mounted on the side face of the ratchet wheel base is connected to the cam on the end face of the disk body in a pressing mode, the ratchet wheel base is provided with a limiting block corresponding to the parking braking stop block and a supporting seat corresponding to the parking braking removing stop block respectively. The two ends of a second torsional spring arranged on the fixed shaft in a sleeved mode are connected with the ratchet and a fixed seat respectively. The ratchet wheel parking braking device of the roller tractor is reasonable in structure, reliable in parking braking and free of maintenance.

Description

technical field [0001] The invention relates to a ratchet parking brake device for a wheeled tractor, belonging to the technical field of parking brakes for a wheeled tractor. Background technique [0002] Many different types of farming and transport tasks are performed on wheeled tractors. In order to ensure driving safety, usually when the vehicle needs to be braked, the driver manipulates the brake mechanism to make the brake act, and the running car will be decelerated or stopped within the shortest distance. And in order to make the vehicle not move after the vehicle is parked, the parking brake is usually required to lock the brake to prevent the car from slipping, especially when parking on a slope. [0003] At present, the parking brake of wheeled tractors usually adopts the braking part of the service brake, that is, a disc brake or a drum brake, and the service brake is locked by manually operating an independent parking control system to realize ramp parking. B...

AI Technical Summary

Problems solved by technology

The wear and tear of the existing parking brake after use will affect the braking stroke, requiring frequent maintenance and adjustment. In addition, the parking brake locks the service brake, which also reduces the reliability of the parking brake.

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