CN201472169U

CN201472169U - Accelerator pedal safety valve of motor vehicle

Info

Publication number: CN201472169U
Application number: CN2009201495203U
Authority: CN
Inventors: 胡义平
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-04-15
Filing date: 2009-04-15
Publication date: 2010-05-19
Anticipated expiration: 2019-04-15

Abstract

An accelerator pedal safety valve used for a motor vehicle is a cylindrical cylinder body whose inner part is filled with liquid mediums, a piston and a piston rod above the cylinder body divide the cylinder body into an upper chamber and a lower chamber, and the liquid mediums are distributed in the two chambers and can flow through a fluid guide hole in the piston; a corresponding valve sheet is installed at one end of the fluid guide hole, the piston rod is movably connected with an accelerator operation rod and a pressure switch is arranged inside the accelerator pedal safety valve. When a driver steps an accelerator down to stop the vehicle by mistake in an urgent situation, the valve sheet instantly and automatically cuts off the fluid guide hole inside the piston to ensure that no liquid can flow through to block the piston, so that a piston connecting rod stops moving and the accelerator operation rod is deadly propped; and the pressure change of the liquid starts a braking system for urgent braking through the pressure switch, so that an accident is avoided from occurring.

Description

Safety valve of accelerator pedal motor vehicle

Technical field

The utility model relates to a kind of self-propelled vehicle, the foot-operated gas feeder of the self-propelled vehicle below 3 tons of particularly conducting oneself with dignity and braking stop between pulling safety guard.

Background technology

The foot throttle and the drg of existing self-propelled vehicle all are that branch is arranged, separately operation.The operator in case of emergency often unclamps throttle earlier and touches on the brake suddenly.This moment if the mistake with throttle be used as stopping pull the operation then can cause major traffic accidents.At the utility model of the throttle safety device on the automobile, mostly can not just can reach the effect of emergency braking, but have the process that a pedal continues descending fuel feeding at present in the moment of driver's mis-accelerator pressing.For example: (200410015592.0) (200510030055.8) etc. for solving the problem of new hand particularly or non-full-time driver fault misstepping on accelerator, common way only is to strengthen the emergency reaction ability of chaufeur.And this can not be avoided in case of emergency wrong fully throttle is used as the maloperation of stopping and pulling.

The utility model content

The purpose of this utility model is the instantaneous safety guard that will provide between a kind of gas feeder and the drg.It can avoid the traffic accident that causes because of mis-accelerator pressing to greatest extent.

The purpose of this utility model is achieved in that the utility model inside is columniform cylinder body, full of liquid medium and be separated into two chambeies up and down in the cylinder body by a piston, the diaphragm of pressure switch is immersed in the liquid dielectric, piston and inboard wall of cylinder block running-fit, leave closed pod apertures on the piston, pass through for the liquid dielectric between two chambers, pod apertures can be sealed by cooresponding valve block, valve block passes a spacing pilot bar, and pod apertures is opened.Safety valve of accelerator pedal is controlled engine oil electromagnetic valve and brake system by pressure switch.Concrete operational detail of the present utility model is such: the cylinder body of the utility model interior cylindrical, relatively horizontal surface is vertically installed, and can normally use on the gradient is road surface below 15 °.The kinematic viscosity such as light diesel that are full of the aqueous system that is added with the 10%-40% antifreeze in the cylinder body or are added with antifreeze are lower than the liquid dielectric of 1 li of handkerchief. cylinder body by a piston and on piston rod be divided into two chambers up and down, liquid dielectric is distributed in two chambers, piston and bar can move between the two ends in cylinder, to distribute the volume ratio of two chambers, the inboard wall of cylinder block lower end is provided with limited step, when piston contact limited step, the upper end of piston rod still can pass the cylinder body lid and connect with throttle lever by connecting device, piston-rod lower end passes the part of piston, becoming the spacing pilot bar of valve block after the reduced. leave closed through hole on the piston, the through hole lower end is to there being a valve metal film (ideal material is copper and alloy thereof). and spacing pilot bar passes valve block and valve block is moved along spacing pilot bar frictionless evenly is the outer through being slightly less than the interior through 0.2-0.5mm of pilot hole on the valve block of pilot bar.The free-end of pilot bar has three layers of through hole, can insert locating dowel pin in different holes and adjust valve block folding gap, tramples the difference of speed to adapt to special entity.The diameter of valve block is the 70%-85% of the straight warp of piston.The ratio of the diameter of valve block and thickness is between 10: 2 and 10: 4, and valve block relies on the unlatching that the net weight in the medium keeps pod apertures.The gross area of pod apertures be not less than the valve block radial section long-pending with piston outer periphery sectional area difference and should be covered fully by valve block.No leak medium when the degree of finish of valve block and piston contact surface should be able to guarantee that both in off position, promptly degree of finish is not less than

Or Ra3.2.The axial downstream rate of this valve block in 30% glycol water is approximately about 0.5m/s generally speaking.When normal use Das Gaspedal is quickened, the velocity of displacement of pedal is generally 0.01-0.20m/s, at this moment the valve block by gravity makes pod apertures be in opening, liquid medium can the pod apertures from piston enter epicoele, piston moves down in cylinder body, and Das Gaspedal also can continue to move the control throttle.When emergency situation takes place, if mistake is pulled throttle when stopping, because emergency reaction, the driver tramples under strenuous status that the speed of throttle is fast, and strength is big, and its velocity of displacement is usually at 2-5m/s, much larger than the kinematic velocity of valve block in this liquid dielectric, this moment, valve block was closed pod apertures, and relied on the medium differential pressure between consequent two chambers to keep closed condition, and the transient pressure in the cylinder will reach 2kg/cm ²More than, because the difficult compressibi1ity of liquid, and form inhibition, thereby can reach purpose in the instantaneous dieback Das Gaspedal in any position to piston.Simultaneously, the pressure switch action makes electromagnetic valve disconnect engine oil path, starts the system's self-actuating brake of pulling of stopping, thereby avoids the generation of accident.If just can travel in particular cases, then only need to disconnect and get final product being connected between the utility model and pedal at step on the accelerator suddenly.

The utility model only needs to be connected on existing accelerator control pedal, just the movement conduction of controlling of throttle can be arrived this device, simultaneously, does not change the existing operating habit of chaufeur.Can pull the purpose that emergency control is stopped and pulled in the time of reaching mis-accelerator pressing again with stopping by the normal running throttle.Because the utility model can reach the purpose of quick brake, therefore it also is feasible being used for emergency brake under special circumstances, although use the utility model to come emergency brake, but the quality time that touches on the brake and waste because of the change of feet saved, but do not recommend such use.

Description of drawings

The concrete structure of utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is the structural representation according to a kind of safety valve of accelerator pedal motor vehicle embodiment one that the utility model proposes.

Fig. 2 is the structural representation according to a kind of safety valve of accelerator pedal motor vehicle embodiment two that the utility model proposes.

1 is the cylinder body lid among Fig. 1, and 2 is cylinder body, and 3 is pod apertures, 4 is piston, and 5 is valve block, and 6 is cavity of resorption, 7 is water-fast oily flexible silicon diaphragm, and 8 is the electrode movable contact spring, and 9 is the limited step on piston rod top, 10 is the pressure switch assembly, and 11 is mounting hole, and 12 is the knock hole of 14 lower ends, 13 is elastic positioning pin, 14 is the spacing pilot bar of valve block, and 15 is epicoele, and 16 is piston rod.

1 is the cylinder body lid among Fig. 2, and 2 is cylinder body, and 3 is pod apertures, 4 is piston, and 5 is valve block, and 6 is cavity of resorption, 7 is water-fast oily elastic silica gel diaphragm, and 8 is the electrode movable contact spring, and 9 is the limited step on piston rod top, 10 is the pressure switch assembly, and 11 is mounting hole, and 12 is the knock hole of 14 lower ends, 13 is elastic positioning pin, and 14 is the spacing pilot bar of valve block, and 15 is epicoele, 16 is piston rod, and 17 are the sealing apron, and 18 is valve block flexible glue pad.

The specific embodiment

Embodiment one

Describe in detail according to the details and the service condition that the utility model proposes embodiment one below in conjunction with Fig. 1 and Fig. 2.Liquid dielectric in the present embodiment is the aqueous system that is added with 30% ethylene glycol, and valve block 5 materials are brass, and cylinder body 2, piston 4 are fine limit work again behind the aluminium alloy casting.

Comprise a cylinder body 2 among Fig. 2, cylinder body 2 covers between 1 to be threaded with cylinder body. and the piston 4 and the piston rod 16 that link with Das Gaspedal are arranged in the cylinder body 2, and piston 4 can be free to slide at inboard wall of cylinder block, and the grinding accuracy of its both fitting surfaces all should be not less than

Valve block 5 all is not less than with the degree of finish of piston 4 both contact surfaces Or Ra3.2, when pressure was higher than three barometric pressures, medium did not leak from the cooperation place with the medium in the assurance cylinder body.The diameter thickness ratio of piston 4 is 1: 1, its range in cylinder body should be not less than the stroke (being generally 5cm-15cm) of itself and Das Gaspedal junction, to guarantee the forced stroke of not overslaugh Das Gaspedal, limited step 9 can guarantee the elastic silica gel diaphragm 7 of not touching the cylinder body lower end bottom of spacing pilot bar 14.The pod apertures 3 that connects cavity of resorption 6 and epicoele 15 is arranged on the piston 4, there is the valve block 5 of the unidirectional airtight pod apertures of energy the lower end of pod apertures 3, its both sealing surfaces can be the plane, the sphere or the conical surface. present embodiment adopts face seal. and the lower surface of valve block can be concave surface, convex surface or plane. concave surface can suitably slow down the downstream rate of valve block, convex surface suitably increases the downstream rate of valve block, the plane is adopted in the lower surface of present embodiment valve block, diameter is 75% of the interior warp of cylinder body, through being under the 38mm. normality, leave the gap between valve block 5 and the pod apertures 3 in the cylinder body.The size in gap is usually about 5-15mm.Control the individual difference of throttle speed for different drivers, present embodiment also can be regulated gap between valve block 5 and the piston packing face by the usable length that increases and decreases spacing pilot bar 14, closes the pedal speed of valve block with response.The maintenance in gap realizes by the net weight and the elastic positioning pin 13 thereof of valve block in medium.When the velocity of displacement of Das Gaspedal during less than the running velocity of valve block 5 in liquid dielectric water, gap between valve block 5 and the pod apertures 3 is retained, the liquid dielectric of cavity of resorption 6 can be flowed in the epicoele 15 by pod apertures 3, so that press the maintenance balance in last two chamber liquid down, piston moves down the drive Das Gaspedal smoothly and controls throttle smoothly.Otherwise, when the velocity of displacement of Das Gaspedal during much larger than the running velocity of valve block in liquid dielectric water, valve block 5 is closed the pod apertures on the piston 3, because the obstruction that the difficult compressibi1ity of liquid is brought, thereby, stop Das Gaspedal to continue to move with piston 4 and piston rod 1 dieback.Because the liquid in the cavity of resorption 6 continues to be subjected to the pressure of piston in the fully enclosed environment, kept higher pressure state, the pressure that increases is transmitted to the pressure switch 10 of cylinder body lower end again by liquid dielectric, make switch conduction, engine oil path is closed in electromagnetic valve work, opening simultaneously stops pull system oil-way and emergency brake, thus the traffic accident that causes owing to mis-accelerator pressing avoided effectively.If under the situation that needs anxious step on the accelerator ability normal driving really, then piston rod 16 and Das Gaspedal can be thrown off, just the piston rod of throttle safety valve can freely fall, lose inhibition to pedal.

Material particular and the service condition of the embodiment two that foundation the utility model proposes are described below in conjunction with Fig. 2.Apron 17 and flexible glue pad 18 have been increased in the present embodiment, it is that the 1/2-1/3. flexible glue pad 18 of piston 4 thickness covers hermetically sealed that pastes valve blocks that the radial dimension d of apron 17 is not more than the 10%-20%. axial dimension D of warp in the cylinder body, thickness is the periphery middle part of 0.5mm. piston 4, processes the installation position of apron 17.After increasing apron 17 and flexible glue pad 18, piston 4 still can slide freely at cylinder body 2 inwalls, and the working accuracy of its cylinder body 2 inwalls is not less than

The fitting surface working accuracy of piston 4 then can be lower than two grades of working accuracy of cylinder body 2 inwalls. and the working accuracy of piston 4 sealing surfaces is not less than

Or Ra3.2, the degree of finish of valve block 5 and piston 4 contact surfaces then can be lower than two grades of working accuracy of the contact surface of piston 4 and valve block 5.So can guarantee the interior medium of cylinder body when pressure is higher than three barometric pressures, medium does not leak from the cooperation place yet.In addition, all the other are all identical with embodiment one.Working process is also identical with embodiment one with principle.

Claims

1. safety valve of accelerator pedal motor vehicle, this device inside is columniform cylinder body, full of liquid medium and be separated into two chambeies up and down in the cylinder body by a piston, the diaphragm of pressure switch is immersed in the liquid dielectric, piston and inboard wall of cylinder block running-fit, leave closed pod apertures on the piston, pass through, it is characterized in that safety valve of accelerator pedal controls engine oil electromagnetic valve and brake system by pressure switch for the liquid dielectric between two chambers.

2. safety valve of accelerator pedal motor vehicle according to claim 1 is characterized in that the pod apertures on the piston can be sealed by cooresponding valve block.

3. safety valve of accelerator pedal motor vehicle according to claim 1 is characterized in that valve block passes a spacing pilot bar.

4. safety valve of accelerator pedal motor vehicle according to claim 2, but it is characterized in that the valve block by gravity is opened pod apertures.

5. safety valve of accelerator pedal motor vehicle according to claim 3, the free-end that it is characterized in that spacing pilot bar has the hole of three layers of installing and locating pin.