CN100534845C

CN100534845C - Rack-and-pinion intermediate output type diverter for vehicle

Info

Publication number: CN100534845C
Application number: CNB2007101568801A
Authority: CN
Inventors: 王望予; 沈荣金; 周珑; 陈良根
Original assignee: HANGZHOU SHIBAO AUTO STEERING GEAR CO Ltd
Current assignee: HANGZHOU SHIBAO AUTO STEERING GEAR CO Ltd
Priority date: 2007-11-16
Filing date: 2007-11-16
Publication date: 2009-09-02
Anticipated expiration: 2027-11-16
Also published as: CN101161530A

Abstract

The invention discloses a pinion and rack middle output diverter for vehicle. The diverter comprises gear connected with steering wheel, rack joggled with the gear, linkage mechanism connected with the wheel. A swing arm is also provided. A ball groove is set in the middle of the rack and button head at the lower end of the swing arm is in the ball groove and the up end of the swing arm is of Y shape, and the two button heads of the up end are connected with the linkage mechanism. The section from the pivot point of swing arm to button head is divided into up and lower section, wherein the lower section inserts into the up section to form slip structure. The pivot point of the swing arm is of sphere. An antifriction gasket with zero clearance fit is mounted in the button head and ball groove. The linkage mechanism is divided into two groups, respectively comprising cross tie, trapeze bar and steering knuckle, ball joint of swing arm, cross tie, ball joint of cross tie, trapeze bar, ball joint of trapeze bar, string knuckle and wheel connected in turn. The invention has simple structure and improved performance and high vehicle handling stability, without long rectangular hole.

Description

The vehicle middle output type diverter of rack-and-gear

Technical field

The present invention relates to a kind of wheel steering system, especially a kind of vehicle middle output type diverter of rack-and-gear.

Background technology

Existing vehicle is divided into three kinds with the takeoff output mode of rack and pinion steering gear: end output, two ends output and middle output, and wherein end output is used for cab-over-engine vehicle more, and two ends output is widely used on various manned vehicles, and middle output type is used less.

Referring to Fig. 1, the two ends way of output because of the cut-off point of hyphen pull bar A near wheel, can make wheel orientation angle produce bigger variation when beating in that wheel is upper and lower, and the road-holding property of automobile is had adverse effect.The middle way of output is positioned at automobile longitudinal vertical summetry plane because of the cut-off point of long intermediate rod B, be near the vehicle centerline, so spindle arm is longer, under the condition that wheel bob amount equates, wheel flutter orientation angle variation with middle output type structure is much smaller, thereby helps the improvement of vehicle handling stability.But this structure is used on automobile seldom, its reason is: long intermediate rod B needs with bolt to tooth bar, and follow tooth bar and do same moved further, tooth bar is contained in the steering gear housing, long intermediate rod B is external at steering housing, therefore must on housing, open very long rectangular opening, general hole length more than the 250mm, the hole is wide about 30mm, this causes the strength and stiffness of steering gear housing to reduce.Although also have in this place's design dust protecting cap arranged, if but dust protecting cap breakage, grease in the housing still can be excessive from tapping, and dirts such as extraneous dust, muddy water also just are drilled in the deflector from these places easily, to the running surface generation harmful effect of some part.

Summary of the invention

Technical matters to be solved by this invention provide a kind of simple in structure, need not out the high vehicle of long rectangular opening, performance improvement, vehicle handling stability with output type diverter in the middle of the rack-and-gear.

The present invention addresses the above problem the technical scheme that is adopted: this deflector comprise the gear that links to each other with steering handwheel, with gear mating teeth bar, the connecting rod mechanism that links to each other with wheel, its constructional feature is also to be provided with swing arm, the middle part of described tooth bar is provided with the ball groove, the bulb of swing arm lower end is positioned at the ball groove, the swing arm upper end is Y-shaped, and two sphero-joints of its upper end link to each other with connecting rod mechanism; The fulcrum of swing arm is between swing arm bulb and swing arm upper end, and the fulcrum of swing arm is sphere and is installed on the housing of deflector, has an aperture at the swing arm fulcrum place of steering gear housing; The fulcrum of swing arm is divided into upper and lower two sections to the part between the bulb, and wherein hypomere inserts epimere and forms stretching structure.

The anti-attrition pad that no gap cooperates is housed between bulb of the present invention and the ball groove.

Connecting rod mechanism of the present invention is two groups, comprises intermediate rod, trapeze bar and steering swivel respectively, and the sphero-joint of swing arm, intermediate rod, intermediate rod sphero-joint, trapeze bar, trapeze bar sphero-joint, steering swivel are connected successively with wheel.

The present invention compared with prior art, has following beneficial effect: 1, this deflector is provided with the swing arm parts, the bulb of swing arm lower end is positioned at the ball groove at tooth bar middle part, the swing arm upper end is Y-shaped, two sphero-joints of its upper end link to each other with connecting rod mechanism, the fulcrum of swing arm is sphere and is installed on the housing of deflector, gear, the following part of tooth bar and swing arm fulcrum is contained in the housing of deflector, so only needing to open an aperture at the swing arm fulcrum place of housing gets final product, need not out long rectangular opening, casing rigidity is improved and dust etc. is difficult for falling into causes harmful effect to work in the deflector; 2, the swing arm fulcrum is divided into upper and lower two sections to the part between the bulb, wherein hypomere inserts epimere and forms stretching structure, work as swing arm like this around its spot wobble, the bulb center is to the distance lengthening of tooth bar, can not produce movement interference between bulb and the ball groove yet, further improve the road-holding property of automobile.

Description of drawings

Fig. 1 is the prior art constructions sketch.

Fig. 2 is the structure diagram of the embodiment of the invention.

Fig. 3 is the structure diagram of swing arm part among Fig. 2.

The specific embodiment

Referring to Fig. 2 and Fig. 3, present embodiment comprises tooth bar 1, gear 2, swing arm 10 and connecting rod mechanism, and its middle gear 2 links to each other with steering handwheel, and tooth bar 1 is meshed with gear 2.The middle part of tooth bar 1 is provided with ball groove 17, and the bulb 18 of swing arm 10 lower ends is positioned at ball groove 17, and the anti-attrition pad 21 that no gap cooperates is housed between bulb 18 and the ball groove 17.The fulcrum 22 of swing arm 10 is sphere and is installed on the housing of deflector, has an aperture at the swing arm fulcrum place of steering gear housing, and fulcrum 22 is divided into upper and lower two sections to the part between the bulb 18, and hypomere 20 inserts and forms stretching structure in the epimere 19.The upper end of swing arm 10 is Y-shaped, and this upper end is equipped with left sphero-joint 9 and right sphero-joint 11.Connecting rod mechanism is divided into left and right two groups, the left side comprises left intermediate rod 8, left tie rod arm 7 and left steering joint 5 for one group, and the left sphero-joint 9 of swing arm 10 is connected successively with left intermediate rod 8, left intermediate rod sphero-joint 6, left tie rod arm 7, left tie rod arm sphero-joint 6, left steering joint 5, left wheel 4; The right comprises right intermediate rod 12, right tie rod arm 13 and right steering joint 16 for one group, and the right sphero-joint 11 of swing arm 10 is connected successively with right intermediate rod 12, right intermediate rod sphero-joint 14, right tie rod arm 13, right tie rod arm sphero-joint 15, right steering joint 16, right wheel 23.The fulcrum 22 of gear 2, tooth bar 1 and swing arm 10 is installed in the lower part in the housing of deflector, and grease is arranged in the housing.

During work, chaufeur rotates by rotating steering handwheel driven gear 2, doing straight line with hour rack 1 moves, swing arm 10 is the center swing with fulcrum 22, the Y shape of swing arm upper end is partly by left sphero-joint 9 and right sphero-joint 11, promoting or spur left intermediate rod 8 and right intermediate rod 12 moves in the Transverse plane of Fig. 2, and then left intermediate rod 8, left tie rod arm 7, left steering joint 5 drive left wheel 4 and rotate, right intermediate rod 12, right tie rod arm 13, right steering joint 16 drive right wheel 23 and rotate, thereby realize motor turning.

When wheel is upper and lower when beating, the wheel of the side of beating will be to take exercises in the center with the left sphero-joint 9 or the right sphero-joint 11 of swing arm, and will be long because of the intermediate rod of middle output type, so that the orientation angle of the wheel of beating changes is little, help improving the road-holding property of automobile.Again when swing arm 10 during around fulcrum 22 swing, the center O of bulb 18 ₂Distance to tooth bar 1 can extend, because the fulcrum 22 to bulb 18 (O of swing arm 10 ₁To O ₂) between be divided into upper and lower two sections stretching structure, can eliminate movement interference.

Claims

1, a kind of vehicle middle output type diverter of rack-and-gear, comprise the gear that links to each other with steering handwheel, with gear mating teeth bar, the connecting rod mechanism that links to each other with wheel, it is characterized in that: also be provided with swing arm, the middle part of described tooth bar is provided with the ball groove, the bulb of swing arm lower end is positioned at the ball groove, the swing arm upper end is Y-shaped, and two sphero-joints of its upper end link to each other with connecting rod mechanism; The fulcrum of swing arm is between swing arm bulb and swing arm upper end, and the fulcrum of swing arm is sphere and is installed on the housing of deflector, has an aperture at the swing arm fulcrum place of steering gear housing; The fulcrum of swing arm is divided into upper and lower two sections to the part between the bulb, and wherein hypomere inserts epimere and forms stretching structure.

2, vehicle according to claim 1 is characterized in that: the anti-attrition pad that no gap cooperates is housed between described bulb and the ball groove with output type diverter in the middle of the rack-and-gear.

3, the vehicle according to claim 1 middle output type diverter of rack-and-gear, it is characterized in that: described connecting rod mechanism be about two groups, comprise intermediate rod, trapeze bar and steering swivel respectively, the sphero-joint of swing arm, intermediate rod, intermediate rod sphero-joint, trapeze bar, trapeze bar sphero-joint, steering swivel, wheel connect successively.