CN2320486Y

CN2320486Y - Front-tipping lockover mechanism for flat-head vehicle driver's cab

Info

Publication number: CN2320486Y
Application number: CN 98212858
Authority: CN
Inventors: 杨尚平; 杨晓玉
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-03-04
Filing date: 1998-03-04
Publication date: 1999-05-26
Anticipated expiration: 2008-03-04

Abstract

The utility model relates to a front-tipping lockover mechanism for a flat-head vehicle driver's cab, which belongs to the field of auto parts fitting for automobiles. The mechanism is composed of a crank arm 4, a connecting rod 5, a crank-rocker mechanism, a handle 1, a worm screw 2 and a worm wheel 3, wherein one end of the crank arm 4 is fixed on a worm-wheel shaft; one end of the connecting rod 5 is hinged at the crank arm 4, while the other end is hinged to the bottom of the driver's cab 6; the crank-rocker mechanism serving as a rocker which can be rotated around a hinge 7 fixed on a big beam to tip forward is composed of the driver's cab 6; the worm wheel 3 is engaged with the worm screw 2. The utility model has the advantages of simple structure, low cost, high manufacturability and safety, convenient operation and installation, good self-locking performance, strong versatility, etc., and the front-tipping lockover mechanism for a flat-head vehicle driver's cab is applicable for various types of flat-head vehicles.

Description

The flat fronted car operator's compartment switching mechanism that leans forward

The utility model relates to the preceding tilting mechanism of a kind of operator's compartment, belongs to the vehicular spare parts field.

The existing cab-over-engine vehicle operator's compartment switching mechanism that leans forward has fluid pressure type, helical spring type, types such as compound hinge parallel mechanism (patent No. CN86-2-05242), torsion bar balance spring formula.Wherein the fluid pressure type mechanism that leans forward is easy to operate, but the cost height only is used for heavy motor vehicle usually.The helical spring type mechanism's manufacturability that leans forward is bad, is eliminated substantially.Compound hinge parallel four-bar linkage mechanical property is not good enough, and four-bar mechanism lay across the driving engine top after operator's compartment leaned forward, and both driving engine can't be sling, and had also limited the operational space of on-site maintenance, uses comparatively inconvenience.The torsion bar balance spring formula mechanism that leans forward at home and abroad is used widely, and the present cab-over-engine vehicle below 8 tons and 8 tons of China substantially all is to adopt this mechanism.But this mechanism still deposits the Technology for Heating Processing complexity, is difficult to reach designing requirement; The elastic rod fatiguability fractures and the life-span weak point; Because the elastic rod 10-15 degree of only upspringing, and the manpower of still needing during operation cooperates and could realize overturning and resetting.And difficulty transfers to the optimum position when using, and there is safety hazard in the no self-locking of elastic rod upset.When emergency brake, be prone to operator's compartment and lean forward automatically, shortcoming such as safety is relatively poor.

The purpose of this utility model is to overcome the deficiency of prior art, and provides a kind of anufacturability good, operates light safety, can be between the 0-45 degree optional position stop and the flat fronted car operator's compartment of the self-locking switching mechanism that leans forward.

Summary of the invention of the present utility model is: this flat fronted car cab turning mechanism is combined by a quadric linkage and a worm-and-wheel gear.Quadric linkage is hinged by crank 4, an end and crank 4 that an end is fixed on the worm-wheel shaft, and the connecting rod 5 of the other end and operator's compartment 6 bottom-hinged, and as rocking bar and can form around being fixed on the lean forward operator's compartment 6 of upset of hinge 7 on the automotive frame.Be fixed on worm-and-wheel gear on the automotive frame 9 by handle 1, worm screw 2, form with worm screw 2 ingear worm gears 3.During use, drive worm screw 2 and drive worm gear 3 rotations with the handle 1 that spare tyre is installed, the flat key on the worm gear 3 drives the worm-wheel shaft rotation, and drive crank 4 and rotate synchronously this moment, and crank 4 promotes connecting rod 5, promotes operator's compartment 6 upsets through connecting rod 5 again.Operator's compartment is resetted.

Accompanying drawing 1 is the utility model transmission principle scheme drawing.

Accompanying drawing 2 is the utility model embodiment assembly drowing.

Accompanying drawing 3 is the cut-away view of the utility model accompanying drawing 2 in the A-A position.

The utility model structure is not limited only to shown in the accompanying drawing.

The utility model is described in further detail below in conjunction with accompanying drawing: this flat fronted car operator's compartment switching mechanism that leans forward is combined by a quadric linkage and a worm-and-wheel gear.Quadric linkage is hinged by crank 4, an end and crank 4 that an end is fixed on the worm-wheel shaft, and the connecting rod 5 of the other end and operator's compartment 6 bottom-hinged, and as rocking bar and can form around being fixed on the lean forward operator's compartment 6 of upset of hinge 7 on the automotive frame.The independently worm case of being made up of worm screw 2 and worm gear 3 is by the semicircle deck 8 on the case spare, with be fixed on automobile the 21 and drive the moving worm screw 2 of snail and drive worm gear 3 rotations, flat key on the worm gear 3 drives the worm-wheel shaft rotation, drive crank 4 and rotate synchronously this moment, and promote operator's compartment bottom 6 around hinge 7 upsets through connecting rod 5.The driving sky is resetted.

The utility model compared with prior art has the following advantages: (1) is simple and reliable for structure, can be 0-45 degree staying at random location and self-lockings. (2) good manufacturability, with low cost. (3) the whole adjustment side of peace Just, security is good. (4) simple to operate and laborsaving, required according to measuring and calculating upset cab over engine below 8 tons Be 5-10KG energetically. (5) versatility is good, only needs suitably to adjust installation site and the connecting rod of worm gear case Length is namely applicable to the flat fronted vehicle of different model.

Claims

A kind of flat fronted car operator's compartment switching mechanism that leans forward is characterized in that this switching mechanism is combined by a quadric linkage and a worm-and-wheel gear; Quadric linkage is hinged by crank 4, an end and crank 4 that an end is fixed on the worm-wheel shaft, and the connecting rod 5 of the other end and operator's compartment 6 bottom-hinged, and as rocking bar and can form around being fixed in the lean forward operator's compartment 6 of upset of hinge 7 on the automotive frame; Be fixed on worm-and-wheel gear on the automotive frame by handle 1, worm screw 2, form with worm screw 2 ingear worm gears 3.