CN203254978U

CN203254978U - Veering angle changing speed limiting system

Info

Publication number: CN203254978U
Application number: CN2013201731151U
Authority: CN
Inventors: 陈晓宇; 孟凡冬; 马辉
Original assignee: Chery Heavy Industry Co Ltd
Current assignee: Chery Heavy Industry Co Ltd
Priority date: 2013-04-09
Filing date: 2013-04-09
Publication date: 2013-10-30
Anticipated expiration: 2023-04-09

Abstract

The utility model discloses a veering angle changing speed limiting system. A veering angle sensor used for collecting veering angle signals of a forklift steering wheel transmits the collected signals to a traveling controller. A speed-limiting order is output by the traveling controller to a walking motor. When the system is used for veering, the speed of a forklift is automatically limited within a safe range corresponding to the angle according to the veering angle, so that the whole forklift is effectively prevented from rolling over, cargoes are prevented from being thrown out, and veering is safe and rapid. Large change does not need to be conducted on an existing controller and extra consumption of controller sources is not needed. When the veering angle is small, speed reduction is small, excess energy does not need to be consumed for speed reduction and acceleration, and the whole forklift operation time with one-time charging can be prolonged.

Description

A kind of angle speed limiting system that turns to

Technical field

The utility model relates to the technical field of industrial vehicle, specifically, relates to a kind of electri forklift and turns to control technology.

Background technology

It is the elec. vehicle of three fulcrum supports walking that electri forklift has a class, this class fork truck commonly used has three fulcrum batter fork lift trucks, reach truck, tractor truck etc., if the too fast meeting of these fork trucks speed of a motor vehicle when turning to causes rollover and goods to throw away to be waited dangerously, mainly be at present to rely on the subjective consciousness of chaufeur and the reduction speed of a motor vehicle to avoid this class danger.

Being the steering swivel system open file of " steering speed limiting system for forklift " such as the patent No. 201020202452.5 patent names, is to drive assembly and be provided with projection turning to, and projection is provided with approach switch, and approach switch is fixed on the vehicle frame; The signal output part of approach switch is connected with the signal input part of speed shifter, thereby realizes turning to speed limiting function.Speed limiting system in this open file will speed limit in case depart from travel direction, and different steering angle speed limit is fixed.Can producing so normally travels revises a little direction and will significantly reduce the speed of a motor vehicle, and steering procedure is all advanced with minimum speed, turns to reduce slowly production efficiency, slows down to accelerate also can waste energy again, shorten the car load work-hours that once charges.

The utility model content

Technical problem to be solved in the utility model is to realize a kind of safe, reliable, efficient steering speed limiting system for forklift.

To achieve these goals, the technical solution adopted in the utility model is: a kind of angle speed limiting system that turns to, the steering angle sensor that gathers forklift steering wheel steering angle signal is delivered to travel controller with the signal that gathers, and the order of described travel controller output speed limit is to movable motor.

The utility model has the advantage of, can be automatically when using this system to turn to according to the steering angle restricted speed in the corresponding angle safe range, prevent that effectively car load rollover and goods from throwing away, steering safety is quick.And need to not do large change at existing controller, not consume in addition the controller resource.It is little to slow down when steering angle is little, does not need to expend the excess energy deceleration and accelerates, and can prolong the once car load production time of charging.

Description of drawings

The below makes brief description to the content of every width of cloth accompanying drawing expression in the utility model specification sheets and the mark among the figure:

Fig. 1 is for turning to angle speed limiting system structural representation;

Fig. 2 is for turning to angle speed limiting system steering angle restriction scheme drawing;

Mark among the above-mentioned figure is: 1, steering angle sensor; 2, travel controller; 3, movable motor.

The specific embodiment

Referring to Fig. 1 as can be known, turn to the angle speed limiting system to be provided with a steering angle sensor 1, it connects two group coding dishes by the CANbus bus and gathers forklift steering wheel steering angle signal, and the angle signal that gathers is delivered to travel controller 2, travel controller 2 is according to the speed limit instruction of internal unit, the output restricting signal is to movable motor 3, thereby the control fork truck is turning to Shi Buhui to cause the accident because of excessive velocities.

As shown in Figure 2, travel controller 2, limits below the safety speed that moving velocity is corresponding scope by adjusting the movable motor electric current according to the scope segmentation at steering angle place, with reach when turning to moving velocity with steering angle by the corresponding relation real-time change, the purpose that safety turns to.Specifically, according to vehicle parameter, steering angle β when calculating the easiest rollover tendency when turning to, and the vehicle of this angle speed V (β) (will consider inertia) that can turn to safely, whole steering angle scope centered by β, 10 ° be one section, be divided into several sections, as [β-15 °, β-5 °), [β-5 °, β+5 °), [β+5 °, β+15 °), [β+15 °, β+25 °) ... ...Calculate respectively safe turning velocity V(β-5 ° of each section), V(β °), V(β+5 °), V(β+15 °) ... thereby. travel controller 2 is compared signal and default value that steering angle sensor 1 gathers, thereby draw the safety speed of this steering angle, and it is flowed to movable motor 3 as speed limit, limit below the safety speed that moving velocity is corresponding scope, with reach when turning to moving velocity with steering angle by certain corresponding relation real-time change, the purpose that safety turns to.

As preferably, for the vehicle that adopts EPS electricity steering swivel system, do not need to add separately steering angle sensor, steering angle can be passed wheel flutter meta signal back to steering controller by approach switch, calculate steering angle by steering controller signal is passed to travel controller, adopt the CANbus bus communication between the controller.

The above has carried out exemplary description to the present invention by reference to the accompanying drawings; obviously the utility model specific implementation is not subjected to the restriction of aforesaid way; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving design of the present invention and technical scheme are directly applied to other occasion, all within protection domain of the present utility model.

Claims

1. one kind turns to the angle speed limiting system, it is characterized in that: the steering angle sensor (1) that gathers forklift steering wheel steering angle signal is delivered to travel controller (2) with the signal that gathers, and the order of described travel controller (2) output speed limit is to movable motor (3).