Externally holding belt type tooth form brake

Abstract

The invention provides an externally holding belt type tooth form brake and belongs to the technical field of vehicle speed control systems. The externally holding belt type tooth form brake comprisesa braking hub, a braking belt and a driving mechanism; the braking belt adopts a segmentation symmetric type structure, concentric and uniform contraction is realized in the braking contraction process, gaps of all meshing tooth pairs in the circumferential direction are synchronously reduced, multi-teeth meshing is facilitated, and the stress is shared; and the driving mechanism adopts a lead screw nut driven by a motor, a braking state of the braking belt can be self-maintained by the application of the mechanical self-locking property of the driving mechanism and does not need to be maintained by continuous work output of an operation mechanism, the energy consumption of a control system is greatly reduced, and meanwhile the safety and the braking reliability of the control system areimproved. Meanwhile, elastic toothed sleeves are arranged on trapezoidal teeth on the braking hub, and the effects of relieving impact and uniformly stressing each tooth are achieved.

Description

technical field [0001] The invention relates to a brake, in particular to an outer belt-type toothed brake, which belongs to the technical field of vehicle transmission systems. Background technique [0002] The shift control elements of the planetary transmission mechanism inside the automatic transmission of traditional fuel vehicles often use wet multi-plate brakes, relying on the friction torque between the friction plates to brake the planetary row components. The friction plates are consumables, and they work under heavy loads , prone to warping, ablation or even fracture of the friction plate, even if the brake is in the no-load separation state, there will be power loss with oil drainage, and the control of the wet multi-disc brake requires a complex and heavy hydraulic control system to complete . However, in new energy vehicles, especially purely electric vehicles, it is not convenient to arrange a hydraulic control system that uses the continuous operation of the...

AI Technical Summary

Problems solved by technology

In the belt braking process, after the first steel tooth on the belt contacts with the steel tooth on the wheel, the brake lever at both ends can be divided into a tight side brake lever and a loose side brake lever with the meshing teeth as the boundary. The force on the side will be much greater than that on the loose side, which will cause differences in the movement of the levers on both sides, resulting in non-concentric and non-uniform shrinkage of the belt, which directly leads to the inability of the multiple steel teeth on the brake band and the brake wheel to fully Effective meshing and load-bearing braking force, so that the meshing of a single steel tooth will greatly increase the force on the meshing tooth, endangering the strength and life safety of the meshing steel tooth and its connection structure

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