CN202896190U - Heavy truck steering front axle - Google Patents

Abstract

The utility model relates to a heavy truck steering front axle, and solves the problems existing in the prior heavy trucks. The heavy truck steering front axle comprises a front axle body, a steering knuckle assembly, a hub assembly, a hub flange, a braking disc, a steering knuckle pivot, an adjustable pad and a lower end cover. The steering knuckle comprises a steering knuckle, a needle bearing embedded within the steering knuckle and a sealing ring for sealing and oiling needle bearing oil. The steering knuckle assembly is connected with the front axle body through the steering knuckle pivot. The steering knuckle pivot is matched with the needle bearing of the steering knuckle assembly and is connected with the steering knuckle assembly through the lower end cover of the adjustable pad in a fastening mode. The hub assembly, the braking disc and the hub flange are connected with one another through bolts. The hub assembly comprises a hub, a double-row tapered roller bearing, a pad and an elastic collar which are used for fixing the double-row tapered roller bearing. The double-row tapered roller bearing is of a single-outer-ring and double-inner-ring structure, bearing clearance is a constant value, and an oil seal and a clamping ring for fixing the bearing inner rings are integrated within the double-row tapered roller bearing. The heavy truck steering front axle has the advantages that steps of mounting and adjusting are simple, pre-fastening is convenient, and environmental pollution is reduced.

Description

The heavy duty truck front steering axle

Technical field:

The present invention relates to a kind of truck front steering axle, be applicable to medium and heavy card, passenger-carrying chassis.

Background technology:

Automobile front axle is bearing plummet power, transverse force, longitudinal force and moment thereof and impact load that automobile load on spring and ground give car load as the important large assembly of automobile, and takes into account the function that turns in the vehicle traveling process.The front steering axle hub portion of conventional confguration adopts two single-row tapered roller bearings at present, when Hub assembly assembles, needs manual shift bearing working play, and bearing life is affected by human factors larger; Wheel hub and wheelboss flange are inblock cast, assembling difficulty, inconvenient maintenance; Load is passed to tire by front pontic, thrust bearing, steering swivel, wheel hub, complex structure.

Summary of the invention:

The present invention has solved present heavy duty truck front steering axle and has needed manual shift bearing working play by a kind of front steering axle different from conventional confguration is provided, bearing life is affected by human factors large, assembling difficulty, the problems such as inconvenient maintenance and front-axle structure complexity.

The present invention is realized by following technical scheme:

A kind of heavy duty truck front steering axle, comprise front pontic, knuckle assembly, Hub assembly, wheelboss flange, brake disc, knuckle pivot pin, adjusting pad and bottom end cover, knuckle assembly comprises steering swivel, be embedded in its inner needle bearing and be used for the seal ring of seal lubrication needle bearing lubricating oil; Knuckle assembly is connected with front pontic by knuckle pivot pin, and knuckle pivot pin cooperates with the needle bearing of knuckle assembly, and is fastenedly connected by bottom end cover and the knuckle assembly that adjusting pad is housed;

Hub assembly, brake disc, wheelboss flange are bolted, and Hub assembly comprises wheel hub, double-row conical bearing, is used for fixedly pad and the circlip of double-row conical bearing; Double-row conical bearing is single outer ring, two inner ring structure, and bearing clearance is definite value, and inside is integrated with oil sealing and is used for the snap ring of fixed type bearing inner ring.

Knuckle pivot pin is tapered pin.

The required fitting surface of hub-bearing unit of the present invention is few, has reduced bearing its Surrounding Parts processing request and cost; Assembling and set-up procedure are simple, have reduced bearing and oil sealing assembling damage probability; Be convenient to pretension, the bearing unit play that dispatches from the factory arranges accurately, makes assembling rear bearing system play accurate; The bearing unit system reliability is high, reduces wheel limit maintenance time, improves car load operation usefulness; Be convenient to management, bearing unit and its Surrounding Parts quantity are few, improve the logistics management convenience; The high effective integration bearing seal avoids grease to leak environmental contamination reduction.

Description of drawings:

Fig. 1 is structural representation of the present invention;

Fig. 2 is Hub assembly schematic diagram of the present invention;

Fig. 3 is the I section enlarged drawing of Fig. 1.

The specific embodiment:

As shown in Figure 1 to Figure 3, the present invention includes front pontic 1, knuckle assembly 7, Hub assembly 9, wheelboss flange 8, brake disc 10, knuckle pivot pin 3, track arm 2, tierod assembly 4, disk brake assembly 11, adjusting pad 5 and bottom end cover 6, knuckle assembly 7 comprises steering swivel 18, be embedded in its inner needle bearing 19 and be used for the seal ring 20 of seal lubrication needle bearing lubricating oil; Knuckle assembly 7 is connected with front pontic 1 by knuckle pivot pin 3, and knuckle pivot pin 3 cooperates with the needle bearing 19 of knuckle assembly 7, and is fastenedly connected with knuckle assembly 7 by the bottom end cover 6 that adjusting pad 5 is housed; Hub assembly 9, brake disc 10, wheelboss flange 8 are bolted, and Hub assembly 9 comprises wheel hub 12, double-row conical bearing 13, is used for fixedly pad 15 and the circlip 14 of double-row conical bearing 13; Double-row conical bearing 13 is single outer ring, two inner ring structure, and bearing clearance is definite value, and inside is integrated with oil sealing 16 and is used for the snap ring 17 of fixed type bearing inner ring, and knuckle pivot pin 3 can be tapered pin.

Hub assembly 9 of the present invention and wheelboss flange 8 are two style structure, are connected with brake disc 10 by bolt, and the advantage of this propons wheel hub connection mode is: simple in structure, simplify the propons assembly technology, and easy to maintenance; Hub bearing is double-row conical bearing 13, this bearing is single outer ring, two inner ring structure, appropriate design by the bearing inner structure, guaranteed that bearing is under enough larger axial force effects, bearing clearance is definite value, control the way of bearing clearance with the conventional confguration propons by regulating screw-down torque and compare, advantage is: avoided the improper and bearing premature failure that causes of artificial adjusting bearing clearance; Simultaneously, double-row conical bearing 13 is inner integrated oil sealing 16, grease has been filled in inside, has realized the non-maintaining of bearing, and has simplified front-axle structure, has saved thrust ring and the hub oil seal of traditional front-axle structure, keeps in repair also convenient; Knuckle pivot pin 3 is tapered pin, load on spring is delivered to double-row conical bearing 13, wheel hub and tire by front pontic 1, knuckle pivot pin 3, adjusting pad 5, bottom end cover 6, bottom end cover bolt and knuckle assembly 7, the thrust bearing of conventional confguration propons has been saved in the design of this structure, structure is compacter, and is simultaneously cost-saved.

Claims (2)

1. heavy duty truck front steering axle, it is characterized in that: comprise front pontic, knuckle assembly, Hub assembly, wheelboss flange, brake disc, knuckle pivot pin, adjusting pad and bottom end cover, knuckle assembly comprises steering swivel, be embedded in its inner needle bearing and be used for the seal ring of seal lubrication needle bearing lubricating oil; Knuckle assembly is connected with front pontic by knuckle pivot pin, and knuckle pivot pin cooperates with the needle bearing of knuckle assembly, and is fastenedly connected by bottom end cover and the knuckle assembly that adjusting pad is housed;

Hub assembly, brake disc, wheelboss flange are bolted, and Hub assembly comprises wheel hub, double-row conical bearing, is used for fixedly pad and the circlip of double-row conical bearing; Double-row conical bearing is single outer ring, two inner ring structure, and bearing clearance is definite value, and inside is integrated with oil sealing and is used for the snap ring of fixed type bearing inner ring.

2. a kind of heavy duty truck front steering axle according to claim 1, it is characterized in that: knuckle pivot pin is tapered pin.

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