CN202827708U

CN202827708U - Rack-type steering device of car gear

Info

Publication number: CN202827708U
Application number: CN201220493506.7U
Authority: CN
Inventors: 陈世平; 陈永林; 张捷; 郭常立
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2012-09-25
Filing date: 2012-09-25
Publication date: 2013-03-27
Anticipated expiration: 2022-09-25

Abstract

The utility model relates to a rack-type steering device of a car gear. The rack-type steering device of the car gear comprises a rack, a casing body of the steering device, a gap adjusting mechanism, a small gear shaft and a dust-proof hood. A deep groove ball bearing is sleeved on the small gear shaft. A ring-shaped groove is arranged on the circumference of a place, adjacent to the upper end face of an inner ring of the deep groove ball bearing, of the small gear shaft. A clamping ring is arranged in the ring-shaped groove of the small gear shaft in a press fitting mode. The lower end face of the clamping ring abuts against the upper end face of the inner ring of the deep groove ball bearing. A shaft plug is sleeved on the small gear shaft and in spin connection with the upper end of the casing body of the steering device so that the lower end face of the bearing plug abuts against the upper end face of an outer ring of the deep groove ball bearing. The rack-type steering device of the car gear can prevent the small gear shaft from displacing along the axial direction, avoid noise caused by impact of the deep groove ball bearing and provide people in the car with coziness.

Description

A kind of automobile gear rack-type steering gear

Technical field

The utility model relates to the automotive steering parts, is specifically related to a kind of automobile gear rack-type steering gear.

Background technology

Deflector is most important parts in the automotive steering, and its effect is to increase steering handwheel to pass to the power of steering gear and the direction of transfer that changes power.Deflector can be divided into polytype by version, and have pinion and-rack, worm screw crank stylus pin formula, circulating ball-rack tooth commonly used fanned formula, circulating ball crank stylus pin formula, worm screw roller type etc. at present.

Traditional automobile gear rack-type steering gear structure comprises tooth bar 1, steering gear housing 2, pinion shaft 4, dust boot 5 and the clearance adjustment mechanism 3 that is located at the rack and pinion engagement position as shown in Figure 4.Be set with deep groove ball bearing 6 at pinion shaft, the first boss 2a end face on 6b lower surface, deep groove ball bearing outer ring and the steering gear housing is inconsistent, the second boss 4a end face on its inner ring 6a lower surface and the pinion shaft is inconsistent, upper surface, deep groove ball bearing outer ring and the first back-up ring 7 are inconsistent, and its inner ring upper surface and the second back-up ring 8 are inconsistent.In order to guarantee the assembling capacity of deep groove ball bearing and back-up ring, between back-up ring and back-up ring hole, leave certain gap when usually designing, the in addition impact of bearing width, back-up ring thickness, back-up ring hole Mismachining tolerance, so that there is larger gap in the deep groove ball bearing practical set after finishing in axial direction, and deflector when work pinion shaft play vertically under responsive to axial force, and then make deep groove ball bearing bump back-up ring produce sound, this transmission sound is in the compartment, and meeting is so that driver and crew produce sense of discomfort.

Summary of the invention

The purpose of this utility model is to provide a kind of automobile gear rack-type steering gear, prevents pinion shaft along the axis direction play, produces abnormal sound to avoid deflector.

Automobile gear rack-type steering gear described in the utility model, comprise tooth bar, steering gear housing, clearance adjustment mechanism, pinion shaft and dust boot, be set with deep groove ball bearing at pinion shaft, the first raised head face on lower surface, deep groove ball bearing outer ring and the steering gear housing is inconsistent, the second raised head face on its inner ring lower surface and the pinion shaft is inconsistent, circumferentially offering circular groove near edge on the pinion shaft of deep groove ball bearing inner ring upper surface, pinion shaft is pressed with snap ring at this circular groove place, and the lower surface of snap ring and deep groove ball bearing inner ring upper surface are inconsistent; Be set with bearing spigot at pinion shaft, bearing spigot and steering gear housing upper end spin, and make the upper surface, outer ring of bearing spigot lower surface and deep groove ball bearing inconsistent.

Between bearing spigot step end face and steering gear housing upper surface, be provided with seal ring, between bearing spigot top and pinion shaft, be provided with oil sealing.

Automobile gear rack-type steering gear described in the utility model, because adopting bearing spigot and snap ring to substitute back-up ring carries out spacing to deep groove ball bearing, eliminated because the generation endplay at the deep groove ball bearing place that part's machining errors and assembly error cause, and then so that when deflector is worked pinion shaft play vertically not, thereby avoided the deep groove ball bearing bump to produce abnormal sound, so that driver and crew obtain preferably comfort.

Description of drawings

Fig. 1 is that master of the present utility model looks schematic diagram;

Fig. 2 is along the cutaway view of B-B line among Fig. 1;

Fig. 3 is the enlarged drawing at M place among Fig. 2;

Fig. 4 is the inner structure schematic diagram of existing rack and pinion steering gear.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is further described.

Such as Fig. 1, Fig. 2 and shown in Figure 3, this automobile gear rack-type steering gear, comprise tooth bar 1, steering gear housing 2, clearance adjustment mechanism 3, pinion shaft 4 and dust boot 5, be set with deep groove ball bearing 6 at pinion shaft 4, the first boss 2a end face on 6b lower surface, deep groove ball bearing outer ring and the steering gear housing 2 is inconsistent, the second boss 4a end face on its inner ring 6a lower surface and the pinion shaft 4 is inconsistent, circumferentially offering circular groove 4b near edge on the pinion shaft 4 of deep groove ball bearing inner ring 6a upper surface, pinion shaft 4 is pressed with snap ring 10 at this circular groove 4b place, and the lower surface of snap ring 10 and deep groove ball bearing inner ring 6a upper surface are inconsistent; Be set with bearing spigot 9 at pinion shaft 4, bearing spigot 9 spins with steering gear housing 2 upper ends, makes the upper surface, outer ring of bearing spigot 9 lower surfaces and deep groove ball bearing 6 inconsistent.

During installation, be pressed on the pinion shaft 4 by pressing deep groove ball bearing 6 and snap ring 10 together, snap ring 10 is out of shape owing to being subject to the power of pressing, and will fit tightly together with deep groove ball bearing 6 and arc groove 4b, just can not produce endplay between deep groove ball bearing 6 and the snap ring 10 like this.The upper square set of deep groove ball bearing has bearing spigot 9 on described pinion shaft 4, its outer wall contacts with the steering gear housing inwall, outer wall at bearing spigot 9 is provided with outside thread 9c, be provided with negative thread 2b at steering gear housing 2 inwalls, this bearing spigot 9 can be by screwing the upper surface that pushes against deep groove ball bearing 6 outer rings downwards.After tightening by screw thread between bearing spigot 9 and the steering gear housing, the lower surface of bearing spigot 9 tightly props up the outer ring 6b of deep groove ball bearing, makes it to clash into the generation abnormal sound at end float misalignment.

As shown in Figure 3, between bearing spigot 9 step end faces and steering gear housing 2 upper surfaces, be provided with seal ring 9a, between bearing spigot 9 tops and pinion shaft 4, be provided with oil sealing 9b.Sealing circle 9a and oil sealing 9b play sealing function, prevent that dust from entering in the steering gear housing.

Claims

1. automobile gear rack-type steering gear, comprise tooth bar (1), steering gear housing (2), clearance adjustment mechanism (3), pinion shaft (4) and dust boot (5), be set with deep groove ball bearing (6) at pinion shaft, the first boss (2a) end face on (6b) lower surface, deep groove ball bearing outer ring and the steering gear housing is inconsistent, the second boss (4a) end face on its inner ring (6a) lower surface and the pinion shaft is inconsistent, it is characterized in that: circumferentially offering circular groove (4b) near edge on the pinion shaft of deep groove ball bearing inner ring upper surface, pinion shaft is pressed with snap ring (10) at this circular groove place, and the lower surface of snap ring and deep groove ball bearing inner ring upper surface are inconsistent; Be set with bearing spigot (9) at pinion shaft, bearing spigot and steering gear housing upper end spin, and make the upper surface, outer ring of bearing spigot lower surface and deep groove ball bearing inconsistent.

2. automobile gear rack-type steering gear according to claim 1, it is characterized in that: between bearing spigot (9) step end face and steering gear housing (2) upper surface, be provided with seal ring (9a), between bearing spigot top and pinion shaft (4), be provided with oil sealing (9b).