CN206086854U

CN206086854U - Hub structure is supported in steering gear

Info

Publication number: CN206086854U
Application number: CN201621089023.5U
Authority: CN
Inventors: 贾兵云; 王泽森
Original assignee: FAW KOYO STEERING Ltd; Fawer Automotive Parts Co Ltd
Current assignee: FAW KOYO STEERING Ltd; Fawer Automotive Parts Co Ltd
Priority date: 2016-09-29
Filing date: 2016-09-29
Publication date: 2017-04-12
Anticipated expiration: 2026-09-29

Abstract

The utility model discloses a hub structure is supported in steering gear has circumference equipartition concavity groove on the rack casing, the injection moulding of concavity groove on rack casing department supports the filler block, and injection moulding supports the filler block including moulding plastics in the convex portion of rack casing concavity inslot, moulding plastics at the annulus of rack casing hole, the through -hole, the serration that have the circumference equipartition on the annulus, the annulus is less than the rack diameter along serration's inscribed circle diameter, convex portion, annulus and the rack casing of the support filler block of moulding plastics form a body structure, the radial flexible volume of circumference equipartition through -hole increase on the annulus, guarantee to support the fit clearance hour of bush and rack, whole car returnability can be well, realize again that it supports to provide sufficient rack in radial direction, support bush injection moulding is in the casing, and the product percent of pass is high, it is spacing to need not rack dog axial.

Description

A kind of steering gear support bushing structure

Technical field

This utility model belongs to Automotive Steering Technology field, is related to a kind of steering gear support bushing structure；It is particularly well-suited to Pinion and-rack manual steering gear.

Background technology

Pinion and-rack manual steering gear, tooth bar sliding part are supported by support bushing.

Common automobile steering device support bushing structure is, support bushing force fit tooth bar shell inner hole, support bushing Anterior tooth bar block of installing is spacing to support bushing, prevents support bushing from axially deviating from；Support bushing and tooth bar inner hole, it is right Tooth bar is realized supporting.The fit clearance of support bushing and tooth bar is too small, on the one hand can affect car load return performance, on the other hand meeting When causing the inordinate wear of support bushing and rack surface, particularly temperature to raise, frictional force can steeply rise, or even cause different Ring complaint；The fit clearance of support bushing and tooth bar is excessive, and support bushing is substantially reduced for the supporting role of tooth bar；Work as car load In arrangement, the pivot angle of drag link is larger, and when causing tooth bar radial force larger, the supporting role of tooth bar is not enough, tooth bar easily occurs and exists " swing " in bushing, rack axis can swing deflection, and steering system stiffness is reduced, for the steering response of vehicle can be caused It is certain to affect.

The content of the invention

The utility model discloses a kind of steering gear support bushing structure, to solve support bushing and tooth bar in prior art Fit clearance it is too small, affect car load return performance, cause the inordinate wear of support bushing and rack surface；Fit clearance mistake Greatly, for the supporting role of tooth bar is reduced；When tooth bar radial force is larger, the supporting role of tooth bar is not enough, tooth bar easily occurs and exists Clinoid in bushing, the problems such as impacting for the steering response of vehicle.

There is on this utility model tooth bar housing circumferential uniform concave groove；The injection mo(u)lding at the concave groove on tooth bar housing Pad, injection mo(u)lding is supported to support pad to include the convex shaped part being moulded in tooth bar housing concave groove, be moulded in tooth bar housing The annulus in hole；The support convex shaped part of pad of injection, annulus and tooth bar housing form integrative-structure；Convex shaped part makes tooth bar exist Radial direction supports more stable；There is on annulus circumferential uniform through hole；Circumferential uniform through hole increase footpath on annulus To the fit clearance hour of deformable amount, support bushing and tooth bar, keep car load return performance good；Eliminate such as temperature change The gap change of the support pad radial direction for causing, it is to avoid the inordinate wear for occurring causing when gap is too small using fixed support And abnormal sound；The circumferential uniform support tooth bar of convex shaped part, supporting role power are balanced, and tooth bar deflects " swing " without axis.

There is on this utility model tooth bar housing circumferential uniform 4-9 concave grooves；Note at the concave groove on tooth bar housing Molded support pad.

Also have zigzag raised on the annulus of the support pad of this utility model injection mo(u)lding；Zigzag projection is in ring On the periphery that shape portion is contacted with tooth bar；Zigzag is raised along the insertion of rack axis direction, stores oils and fatss, it is ensured that rack bush and Lubrication between tooth bar.Annulus are less than tooth bar diameter along the raised inscribed circle diameter of zigzag.

This utility model good effect is：Ensure the fit clearance hour of support bushing and tooth bar, car load return performance Well；Realize again providing enough rack supports in radial direction；The direct injection mo(u)lding of support bushing is recessed in shell inner hole milling In groove, one-shot forming, conforming product rate are high；Without the need for axial limiting, cancel traditional tooth bar block.

Description of the drawings

Fig. 1 is this utility model structural representation；

Fig. 2 is this utility model D-D cross-sectional views；

Fig. 3 is this utility model E-E cross-sectional views；

Fig. 4 is this utility model F close-up schematic views；

In figure：1 tooth bar housing, 2 support pad, 3 tooth bars, 1a concave grooves, 2a convex shaped parts, 2b annulus, 2c through holes, 2d saws Detent projection, 3a axis.

Specific embodiment

Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing.

This utility model first embodiment is as shown in figure 1, have 1 a of circumferential uniform 4 concave grooves on tooth bar housing 1； Injection mo(u)lding at concave groove on tooth bar housing 1 supports pad 2, injection mo(u)lding support pad include being moulded in tooth bar housing 1 it is recessed Convex shaped part 2a in shape groove, and it is moulded in the annulus 2b of 1 endoporus of tooth bar housing；The convex shaped part 2a of the support pad of injection, ring Shape portion 2b forms integrative-structure with tooth bar housing；The circumferential uniform support tooth bars of convex shaped part 2a, supporting role power are balanced, make tooth bar exist Radial direction supports more stable, and tooth bar deflects " swing " without axis.

As shown in Figure 1, Figure 2, Figure 3, Figure 4, there is circumferential uniform through hole 2c, zigzag projection 2d on annulus 2b；Ring The fit clearance hour of the circumferential uniform through hole increase radially variable shape amount on shape portion 2b, support bushing and tooth bar, keeps car load Return performance is good；Eliminate the gap change of the support pad radial direction that such as temperature change causes, it is to avoid using fixed Overhang existing gap it is too small when the inordinate wear that causes and abnormal sound；The periphery that zigzag projection 2d is contacted with tooth bar in annulus 2b On；Zigzag projection 2d stores oils and fatss, it is ensured that the lubrication between rack bush and tooth bar along the insertion of rack axis direction.Ring-type Portion 2b is less than tooth bar diameter along the inscribed circle diameter of zigzag projection 2d.

There is on this utility model second embodiment tooth bar housing 11 a of circumferential uniform 7 concave grooves；On tooth bar housing 1 Concave groove at injection mo(u)lding support pad 2.

There is on this utility model 3rd embodiment tooth bar housing 11 a of circumferential uniform 9 concave grooves；On tooth bar housing 1 Concave groove at injection mo(u)lding support pad 2.

Claims

1. a kind of steering gear support bushing structure；It is characterized in that：There is on tooth bar housing circumferential uniform concave groove；In tooth bar shell Injection mo(u)lding at concave groove on body supports pad, injection mo(u)lding support pad include being moulded in it is convex in tooth bar housing concave groove Shape portion, the annulus for being moulded in tooth bar shell inner hole；The support convex shaped part of pad of injection, annulus and tooth bar housing form one Body structure；There is on annulus circumferential uniform through hole；Circumferential uniform through hole increase radially variable shape amount on annulus.

2. a kind of steering gear support bushing structure according to claim 1；It is characterized in that：Have on tooth bar housing circumferential Uniform 4-9 concave grooves；The injection mo(u)lding at the concave groove on tooth bar housing supports pad.

3. a kind of steering gear support bushing structure according to claim 1；It is characterized in that：The support pad of injection mo(u)lding Annulus on also have zigzag raised；Zigzag projection is on the periphery that annulus are contacted with tooth bar；Zigzag is raised Along the insertion of rack axis direction, oils and fatss are stored.

4. a kind of steering gear support bushing structure according to claim 3；It is characterized in that：Annulus are raised along zigzag Inscribed circle diameter be less than tooth bar diameter.