CN101519063A - Adjusting method of synchronization and toe-in of double-front-axle steering vehicle - Google Patents

Abstract

The invention relates to an adjusting method of synchronization and toe-in of a double-front-axle steering vehicle, which is characterized by comprising the steps of preparing for the adjustment of tyre toe-in and asynchronization, adjusting the asynchronization between steering axles after a vehicle being parked in a correct place, and adjusting the toe-in of the vehicle. The positional parameters of front wheels can be measured and adjusted simply, effectively and accurately by adopting the method. The method solves the problem of abnormal abrasion of tyres caused by asynchronization among the toe-in and the steering axles. The method is effectively verified and used in the road tests of trucks.

Description

The method of adjustment that car of turning direction with dual front axle is synchronous and prenex

Technical field:

The present invention relates to the synchronous and prenex method of adjustment of a kind of car of turning direction with dual front axle.

Background technology:

Along with the heavily execution of policy on highway in China of transportation of meter, 6 * 2 tractor-trucks, 6 * 2 load-carrying vehicles and 8 * 4 load-carrying vehicles are because complete vehicle weight is light, and overloading goods has been subjected to numerous transport users' welcome, becomes the stub vehicle in 2007 years commercial vehicle/comm..vehicle market.These vehicles all have two steeraxles, one or two drive axle, in the vehicle use, the replacings of the variation in steering gear connection gap, distortion and steering knuckle and intermediate rod etc. will destroy the original relation that turns to, and make two Front wheel Alignment Parameters not right, cause the abnormal tyre wearing and tearing of wheel flutter, the replacement cycle of tire shortens, and consumption of fuel increases, and the vehicle use cost increases.The measurement of positioning parameter of vehicle front wheel and adjustment are generally carried out on the front wheel alignment test cell, a lot of local owing to there are not the front wheel alignment test cell, therefore can not carry out the measurement and the adjustment of positioning parameter of vehicle front wheel effectively.Commercial car is under the normal condition of using, and the major cause of the inordinate wear of the first steering shaft tire is that the tyre toe-in adjustment is improper; The reason of the inordinate wear of the second steering shaft tire mainly is prenex and nonsynchronous mixture, and therefore the second arbor wheel tire degree of wear and speed are faster than primary shaft wear on tyres severity and speed.Kingpin inclination angle, kingpin caster angle and camber angle all can not be adjusted in the Front wheel Alignment Parameters of commercial vehicle/comm..vehicle, so correct adjustment toeing-in and turn to interaxle asynchronously, just can guarantee that inordinate wear does not appear in the tire of steering shaft.

Summary of the invention:

The object of the present invention is to provide the synchronous and prenex method of adjustment of a kind of car of turning direction with dual front axle, it can position the measurement and the adjustment of parameter simply efficiently and accurately to front-wheel.

Technical scheme of the present invention is achieved in that the method for adjustment that car of turning direction with dual front axle is synchronous and prenex, it is characterized in that: concrete grammar is as follows:

(A) preparation of tyre toe-in and asynchronous adjustment

1. adjust the air pressure of steering shaft tire with the tire pressure gauge cross-check sum, make the tire pressure of wheel flutter identical;

2. the tyre sidewall of steering tire should stand intact;

3. measure the place and answer level;

4. vehicle should be at light condition;

5. two front axles that needs are adjusted are propped one by one with jack, and make the terrain clearance of two front axles identical as far as possible, and coaxial upward left and right sides wheel flutter terrain clearance is identical, and wheel can freely rotate, and supports assurance safety with chock;

(B) vehicle is ajusted

Being in the straight-line travelling direction even vehicle is ajusted vehicle, is carry out prenex and synchronous adjustment basic and crucial;

When L1=L2, vehicle travels with rectilinear direction, follows these steps to carry out:

1. rotate the corner of steering handwheel correction wheel flutter

Chaufeur is sitting on the driver chair of automobile, revises the angle of steering handwheel on request.

2. determine vehicle straight-line travelling direction

Two people stretch straight measurement rope, at the tyre sidewall of vehicle outside near dual rotation wheel tire, with two tyre sidewalls left side vertexs (under wheel rim and one or two tyre sidewalls contour as far as possible) with the contact point of measuring rope, should avoid the font on the tyre sidewall, with measuring the vertex that rope draws a straight line to a left side tire tyre sidewall, write down the distance of a left side tire tyre sidewall, be designated as L1; Same procedure obtains the distance of a right side tire tyre sidewall, is designated as L2; Adjust bearing circle, make L1=L2, vehicle is in the straight-line travelling direction; The corner that keeps this steering handwheel.

(C) turn to interaxle asynchronous adjustment

Guarantee the invariant position of steering handwheel, with one is benchmark, measure two L1 and L2, L1 and the L2 of this moment are second toe-in and the nonsynchronous mixture of between centers, the wheelbase of steering shaft can be easy to find out two nonsynchronous directions and size to turning to the interaxle asynchronous amplification that has, and adjusts vehicle second longitudinal tie and adjusts vehicle is asynchronous, make second L1=L2, the asynchronous angle of general vehicle ± 10 ' in;

(D) vehicle carries out prenex adjustment and inspection: with one and two arbor wheel tires, benchmark each other, adjust the intermediate rod of steering shaft, rotating steering handwheel makes vehicle be in the straight-line travelling direction, make the L1=L2 of two steering shafts and the toe-in value that L1+L2 equals to stipulate, for radial-ply tyre, toe-in value is 0-2mm; For diagonal tyre, toe-in value is 2-6mm.Adjusting two when prenex, under the toe-in value condition that one prenex L1=L2 and L1+L2 equal to stipulate, find two prenex L1 ≠ L2, illustrate still exist between steering shaft asynchronous, also (C) adjusts synchronously set by step, thus the toe-in value that makes two prenex L1=L2 and L1+L2 equal to stipulate.

Good effect of the present invention is its measurement and the adjustment that can position parameter simply efficiently and accurately to front-wheel; Solved because the asynchronous abnormal tyre wearing and tearing that cause between toeing-in and steering shaft; This method has obtained the actv. checking and has used in the vehicle road test of liberation car.

Description of drawings:

Fig. 1 ajusts scheme drawing for vehicle of the present invention

The specific embodiment:

The present invention will be further described below in conjunction with accompanying drawing:

(A) preparation of tyre toe-in and asynchronous adjustment

1. adjust the air pressure of steering shaft tire with the tire pressure gauge cross-check sum, make the tire pressure of wheel flutter identical;

2. the tyre sidewall of steering tire should stand intact;

3. measure the place and answer level;

4. vehicle should be at light condition;

5. two front axles that needs are adjusted are propped one by one with jack, and make the terrain clearance of two front axles identical as far as possible, and coaxial upward left and right sides wheel flutter terrain clearance is identical, and wheel can freely rotate, and supports assurance safety with chock.

(B) vehicle is ajusted

As shown in Figure 1, being in the straight-line travelling direction even vehicle is ajusted vehicle, is carry out prenex and synchronous adjustment basic and crucial;

When L1=L2, vehicle travels with rectilinear direction; Follow these steps to carry out:

1. rotate the corner of steering handwheel correction wheel flutter

Chaufeur is sitting on the driver chair of automobile, revises the angle of steering handwheel on request.

2. determine vehicle straight-line travelling direction

Two people stretch straight measurement rope, at the tyre sidewall of vehicle outside near dual rotation wheel tire, with two tyre sidewalls left side vertexs (under wheel rim and one or two tyre sidewalls contour as far as possible) with the contact point of measuring rope, should avoid the font on the tyre sidewall, with measuring the vertex that rope draws a straight line to a left side tire tyre sidewall, write down the distance of a left side tire tyre sidewall, be designated as L1; Same procedure obtains the distance of a right side tire tyre sidewall, is designated as L2; Adjust bearing circle, make L1=L2, vehicle is in the straight-line travelling direction; The corner that keeps this steering handwheel.

(C) turn to interaxle asynchronous adjustment

Guarantee the invariant position of steering handwheel, with one is benchmark, measure two L1 and L2, L1 and the L2 of this moment are second toe-in and the nonsynchronous mixture of between centers, the wheelbase of steering shaft can be easy to find out two nonsynchronous directions and size to turning to the interaxle asynchronous amplification that has, and adjusts vehicle second longitudinal tie and adjusts vehicle is asynchronous, make second L1=L2, the asynchronous angle of general vehicle ± 10 ' in;

(D) vehicle carries out prenex adjustment and inspection: with one and two arbor wheel tires, benchmark each other, adjust the intermediate rod of steering shaft, rotating steering handwheel makes vehicle be in the straight-line travelling direction, make the L1=L2 of two steering shafts and the toe-in value that L1+L2 equals to stipulate, for radial-ply tyre, toe-in value is 0-2mm; For diagonal tyre, toe-in value is 2-6mm.Adjusting two when prenex, under the toe-in value condition that one prenex L1=L2 and L1+L2 equal to stipulate, find two prenex L1 ≠ L2, illustrate still exist between steering shaft asynchronous, also (C) adjusts synchronously set by step, thus the toe-in value that makes two prenex L1=L2 and L1+L2 equal to stipulate.

Claims (1)

1, the synchronous and prenex method of adjustment of car of turning direction with dual front axle, it is characterized in that: concrete grammar is as follows:

(A) preparation of tyre toe-in and asynchronous adjustment

1. adjust the air pressure of steering shaft tire with the tire pressure gauge cross-check sum, make the tire pressure of wheel flutter identical;

2. the tyre sidewall of steering tire should stand intact;

3. measure the place and answer level;

4. vehicle should be at light condition;

5. two front axles that needs are adjusted are propped one by one with jack, and make the terrain clearance of two front axles identical as far as possible, and coaxial upward left and right sides wheel flutter terrain clearance is identical, and wheel can freely rotate, and supports assurance safety with chock;

(B) vehicle is ajusted

Being in the straight-line travelling direction even vehicle is ajusted vehicle, is carry out prenex and synchronous adjustment basic and crucial;

When L1=L2, vehicle travels with rectilinear direction, follows these steps to carry out:

1. rotate the corner of steering handwheel correction wheel flutter

Chaufeur is sitting on the driver chair of automobile, revises the angle of steering handwheel on request;

2. determine vehicle straight-line travelling direction

Two people stretch straight measurement rope, at the tyre sidewall of vehicle outside near dual rotation wheel tire, with two tyre sidewall left side vertexs, under wheel rim and one or two tyre sidewalls contour with the contact point of measuring rope, should avoid the font on the tyre sidewall, with measuring the vertex that rope draws a straight line to a left side tire tyre sidewall, write down the distance of a left side tire tyre sidewall, be designated as L1; Same procedure obtains the distance of a right side tire tyre sidewall, is designated as L2; Adjust bearing circle, make L1=L2, vehicle is in the straight-line travelling direction; The corner that keeps this steering handwheel;

(C) turn to interaxle asynchronous adjustment

Guarantee the invariant position of steering handwheel, with one is benchmark, measure two L1 and L2, L1 and the L2 of this moment are second toe-in and the nonsynchronous mixture of between centers, the wheelbase of steering shaft can be easy to find out two nonsynchronous directions and size to turning to the interaxle asynchronous amplification that has, and adjusts vehicle second longitudinal tie and adjusts vehicle is asynchronous, make second L1=L2, the asynchronous angle of general vehicle ± 10 ' in;

(D) vehicle carries out prenex adjustment and inspection: with one and two arbor wheel tires, benchmark each other, adjust the intermediate rod of steering shaft, rotating steering handwheel makes vehicle be in the straight-line travelling direction, make the L1=L2 of two steering shafts and the toe-in value that L1+L2 equals to stipulate, for radial-ply tyre, toe-in value is 0-2mm; For diagonal tyre, toe-in value is 2-6mm.Adjusting two when prenex, under the toe-in value condition that one prenex L1=L2 and L1+L2 equal to stipulate, find two prenex L1 ≠ L2, illustrate still exist between steering shaft asynchronous, also (C) adjusts synchronously set by step, thus the toe-in value that makes two prenex L1=L2 and L1+L2 equal to stipulate.

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