CN1117002C - Steering gear - Google Patents
Steering gear Download PDFInfo
- Publication number
- CN1117002C CN1117002C CN98124793A CN98124793A CN1117002C CN 1117002 C CN1117002 C CN 1117002C CN 98124793 A CN98124793 A CN 98124793A CN 98124793 A CN98124793 A CN 98124793A CN 1117002 C CN1117002 C CN 1117002C
- Authority
- CN
- China
- Prior art keywords
- projection
- mentioned
- rack shaft
- embedded hole
- protecting sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Power Steering Mechanism (AREA)
- Steering Controls (AREA)
Abstract
The invention is to make the working property of a bracket attached to a boot improvable and also the extent of sealability in a fitting hole part of this boot raisable. A steering wheel in the steering device is connected to a rack shaft shifting according to a steering operation via a mounting bracket with a projection installed with a fitting groove on a peripheral surface and a mounting screw piercing through this projection, and an expansible boot, whose both ends are set up around the rack shaft so as to be sealed up, and installed with a fitting hole to be fitted in the fitting groove, is installed therein, and further this fitting hole of the boot is installed on the top of a projecting part projecting toward the outside.
Description
Technical field
The middle part that the present invention relates to a kind of handle tooth bar mobile along with handling maneuver couples together with the wheel that turns to usefulness and the central output type rack-and-pinion steering device that forms.
Background technology
A kind of form of the steering hardware of automobile is the rack-and-pinion steering device, the structure of this device is the gear with the bearing circle interlock, middle body engagement with the rack shaft that extends along the vehicle body left and right directions, when turning to the spinning movement of bearing circle convert to rack shaft along the moving of axis direction, more this moving passed to left and right wheel flutter (normally front-wheel) and turns to.
This rack-and-pinion steering device can be divided into two kinds, a kind of is the end output type that the pull bar that a pair of and left and right wheel flutter is connected usefulness is connected to the rack shaft two ends, and another kind is the central output type that above-mentioned pull bar all is connected the middle body of rack shaft.
The steering hardware of central authorities' output type, its length that is connected to the pull bar that left and right wheel flutter goes is longer, but its rack shaft and the length that surrounds the axial protecting sleeve that can stretch of this tooth bar but can be done shortly.In addition, it also has the bigger advantage of Design freedom of the relative position relation between various members and the wheel flutter, thereby the car type that is restricted by the setting of some protecting sleeves adopts.Above-mentioned protecting sleeve is the cover of the flexible metal conduit shape of the closed at both ends made with synthetic resin or rubber etc., has water or other foreign matters to enter when preventing the rack shaft rotation.
In above-described central output type steering hardware,, must connect a pair of left and right pull bar at the middle body of the inner above-mentioned rack shaft that moves of protecting sleeve.This ways of connecting is opened clear 57-174275 and US Patent 4,601 strictly according to the facts, shown in 602, is to be installed on the rack shaft by the mounting screw that runs through above-mentioned protecting sleeve and to finish being connected support on the pull bar.
The columnar projection that can pass above-mentioned mounting screw is arranged on above-mentioned support.The excircle that this is protruding as the US Patent among Figure 10 4,601, shown in 602, has formed the conical surface that diminishes to the end face diameter from the bottom surface, and has formed annular embeded slot B at the middle part of the conical surface of this projection A.
In addition; the breakthrough part of protecting sleeve C is arranged with the embedded hole D littler than the external diameter of above-mentioned protruding A; the front end of the protruding A of support E with defeating above-mentioned embedded hole; make this embedded hole D embed in the embeded slot B; so just improved the sealing property to the embedded hole D of protecting sleeve C, the foreign matter of dust, water and so on just is difficult to enter the protecting sleeve the inside from embedded hole D and has gone.
, in above-mentioned steering hardware, because only on the excircle of protecting sleeve C, opened an embedded hole D; so; when firmly the protruding A of support E being compressed into embedded hole D and goes, just produce elastic deformation around the embedded hole D of protecting sleeve C, tapered ground bending towards the inside of protecting sleeve C.Therefore,, also be difficult to embedded hole D is embedded into embeded slot B the inside, make that the operation that support E is installed on the protecting sleeve C is very difficult, the problem that the expense that exists is high even firmly protruding A is compressed in embedded hole D.
In addition; because just the external diameter with embeded slot B is identical or big slightly to be arranged on the diameter of the embedded hole D on the outer circumference surface of protecting sleeve C; so; when embedding above-mentioned embedded hole D in the embeded slot B; can not make embedded hole D push down the external peripheral surface of embeded slot B, so this a part of sealing property of the embedded hole D of protecting sleeve also leave some room for improvement.
Summary of the invention
The structure of steering hardware of the present invention is exactly in view of this to put forward; in the rack-and-pinion steering device of central output type; the embedded hole of protecting sleeve is done the projection that outwards protrudes of pore-forming on every side; thereby can make embedded hole easily embed in the embeded slot; and, can also improve the sealing property of protecting sleeve.
First aspect of the present invention provides a kind of steering hardware; turn to the bearing circle of usefulness on this steering hardware; by having the mounting bracket of the projection that on excircle, is provided with embeded slot; with the mounting screw that passes above-mentioned projection; be connected on the rack shaft mobile along with the operation that turns to; around above-mentioned rack shaft; be provided with the both ends leak free; and the protecting sleeve that can stretch with the embedded hole that embeds above-mentioned embeded slot; it is characterized in that; the retained part that is clamped between support and the rack shaft is formed on the connecting cylinder that connects a pair of telescopic section; above-mentioned embedded hole is arranged on above-mentioned protecting sleeve on the top of the projection of outside protrusion, in case and it produces elastic deformation towards the direction that diameter diminishes after the enlarged-diameter.
Second aspect of the present invention provides a kind of steering hardware, it is characterized in that above-mentioned projection is the taper that diminishes to top diameter from the bottom.
In aspect first and second aspect of the present invention; owing to the top that embedded hole is arranged on to outside projection; so when the embedded hole the top of projection compressed on the protecting sleeve; under the top and embedded hole state of contact of projection; projection around the embedded hole is in the direction elastic deformation of enlarged-diameter, and is tapered to the inside bend of protecting sleeve.
Under the state of embedded hole generation elastic deformation, one works as the pushing that stops projection, and projection is drawn to the opposite direction of pushing, makes embedded hole be in the outside of protecting sleeve, at this moment, pushes projection again.At this moment; the elastic deformation of the projection around the embedded hole bigger when pushing for the first time; again push under the state that the elastic deformation amount who allows reduces because be; that is to say; once push again from the state harder than the elasticity at initial stage; because this pushing second time; the phenomenon of unexpected expansion has just taken place on above-mentioned projection; because this expansion phenomenon; make projection no longer to the inside bend of protecting sleeve; and, embedded hole is embedded in the embeded slot securely to the direction generation elastic deformation of enlarged-diameter.
Like this, by means of the pushing to projection, the projection that makes protecting sleeve can be easy to just embedded hole be embedded in the embeded slot by stages towards the direction generation elastic deformation of enlarged-diameter.Get on that operation is simple thereby make support install to protecting sleeve, can also cost-cutting.
And; because embedded hole is arranged on the top of projection; even so do the external diameter of embeded slot greatlyyer than the diameter of embedded hole; with mounting screw support is being installed on the rack shaft; and above-mentioned projection is when being flat condition; also can make this projection carry out elastic deformation,, just improve the leak tightness of protecting sleeve embedded hole part simply so just can allow embedded hole compress above-mentioned embeded slot to the direction of reduced.
Description of drawings
Below, embodiments of the present invention will be described in detail with reference to the accompanying drawings.In the accompanying drawing:
Fig. 1 is the instruction diagram that explanation is partially submerged into the embedded hole of steering hardware of the present invention the process of going in the embeded slot;
Fig. 2 is the skiagraph of the main portion of steering hardware of the present invention;
Fig. 3 is the cross sectional drawing after the decomposition of the protecting sleeve of steering hardware of the present invention and support;
Fig. 4 represents the protecting sleeve of steering hardware of the present invention, wherein, is to omit part skiagraph afterwards (a); (b) be backplan; (c) be front elevation;
Fig. 5 is vertical sectional view of the protecting sleeve of steering hardware of the present invention;
Fig. 6 is the backplan of the rack shaft of steering hardware of the present invention;
Fig. 7 is the assembling cross sectional drawing of steering hardware of the present invention;
Fig. 8 is the cross sectional drawing of main portion of another embodiment of steering hardware of the present invention;
Fig. 9 is the cross sectional drawing of main portion of another embodiment of steering hardware of the present invention;
Figure 10 is the cross sectional drawing of steering hardware in the past as an example.
The specific embodiment
Rack-and-pinion steering device as shown in Figure 7 is a kind of steering hardware of central output type, and it has following various parts: an end is connected with bearing circle with linkage manner, and the other end is being adorned the gear wheel shaft 1 of gear (not shown); Has the tooth (not shown) with said gear ingear spline-simulating, the rack shaft 2 that extends towards the vehicle body left and right directions; Be arranged on this rack shaft 2 around, the sealed at both ends columnar protecting sleeve that can stretch 3; Be clipped in the middle of rack shaft 2 and the protecting sleeve 3, supporting the tooth bar housing 4 of rack shaft 2 and protecting sleeve 3; Support 6 in order to the bottom that keeps a pair of pull bar 5,5; Separate certain being disposed on this support 6, a pair of protruding 60,60 of embeded slot 61 is arranged on excircle; Pass that this is a pair of protruding 60,60, can be at the mounting screw under the installation or removal on the above-mentioned rack shaft 27,7.
As shown in Figure 7, rack shaft 2 is bearing in the inside of the cylindrical circular tooth bar housing 4 of an above-mentioned end osed top, can be free to slide to axis direction.In addition, on an end of rack shaft 2, separate the mounting hole 21,21 that certain intervals has been offered above-mentioned support 6 usefulness of a pair of installation along axis direction.As shown in Figure 2, these two mounting holes 21,21 tilt along the axis direction of rack shaft 2, and criss-cross, the opening portion in the hole are provided with smooth platform 22,22.
As shown in Figure 7, one end of tooth bar housing 4 is osed tops, the other end opens wide, be formed with the tube at the end, at its middle part of sealing a side, be provided with it and intersect and bonded assembly gear housing 8, the said gear axle 1 that can freely rotate around axis at the interior support of this gear housing 8, when this gear wheel shaft 1 rotates, just make rack shaft 2 slide along axis direction.
As shown in Figure 7; the middle part of one side of opening wide of tooth bar housing 4 is provided with to allowing above-mentioned support 6 can move the window 41 of usefulness with respect to tooth bar housing 4; and cover with above-mentioned protecting sleeve 3 zone that forms this window 41 around, enter the inside of tooth bar housing 4 from window 41 with the foreign matter that prevents dust, water and so on.
As shown in Figure 2, there is clamping a pair of grip block 62,63 of the bottom part of pull bar 5 on the support 6, the connecting panel 64 that grip block 62,63 is coupled together, and separate the projection 60,60 that certain intervals is fixed on the above-mentioned pair of cylinders shape on the side grip block 62.On each grip block 62,63, offered and the corresponding through hole 65 in the center of these two projectioies 60,60.And, above-mentioned mounting screw 7 is inserted in the hole of the through hole 65 and the core of projection 60.As shown in Figure 1, projection 60,60 diminishes to top end diameter gradually from the bottom, and is tapered, offered annular embeded slot 61,61 on the excircle of projection 60,60 bottom parts.
Shown in Fig. 4,5; because protecting sleeve 3 is to make with having flexible synthetic resin or rubber and so on; so the telescopic section 31,31 of snakeskin tubular type is made at its two ends; and the connecting cylinder 32 that connects these two telescopic sections 31,31 in addition is provided with the pancake embedded part 33 relative with above-mentioned support 6 on this connecting cylinder 32.In addition,, also be installed on the tooth shaft housing 4, it is closed with loading onto the installation ring 9,9 that also can dismantle at the two ends of telescopic section 31,31.
As Fig. 4 (a) with (b), on embedded part 33, be provided with the embedded hole 34,34 that embeds in above-mentioned protruding 60,60 the embeded slot 61,61.This embedded hole 34,34 is arranged on the top of the projection 35,35 that protrudes to the outside.This projection 35,35 is the same with above-mentioned protruding 60,60, be the taper that diameter diminishes from the bottom to the top, and the diameter of embedded hole 34,34 is smaller slightly than the external diameter of embeded slot 61,61.
As Fig. 2 and shown in Figure 4, embedded hole 34 on embedded part 33, be provided with protrusion between 34 in embedded part 33, the retained part 36 on outer two sides, when above-mentioned mounting screw 7,7 tighten, in the time of mounting bracket 6, just above-mentioned retained part 36 is clamped between support 6 and the rack shaft 2, because such clamping, make retained part 36 that elastic deformation take place, and the elastic deformation of this retained part has influence on projection 35,35 bottom, embedded hole 34,34 are pressed into embeded slot 60, in 60, thereby can further improve embedded hole 34,34 these a part of leak tightnesss.
In addition, steering hardware as shown in Figure 7 is a kind of with the steering hardware of hydraulic pressure as the auxiliary power that rack shaft 2 is slided.The power hydraulic cylinder 10 that rack shaft 2 is applied auxiliary power has with an end of rack shaft 2 and is connected, and with the piston rod 11 of rack shaft coaxial line, this piston rod reaches in the hydraulic actuating cylinder 12 of the open end that is connected tooth bar housing 4, and be installed in piston 13 on the inserting end, by the seal ring on the excircle that is installed in this piston 14, pack in the hydraulic actuating cylinder 12, and can be free to slide therein.
Hydraulic actuating cylinder 12 is the pipes that the end is arranged, and it is an osed top at an end opposite with tooth bar housing 4 bonded assemblys, and with the installed inside of tooth bar 4 bonded assemblys one end the sealing member holder 16 of fixing seals 15 usefulness.Piston rod 11 puts in the inside of hydraulic actuating cylinder 12, also with above-mentioned sealing element 15 its middle parts of sealing.
As mentioned above, power hydraulic cylinder 10 is in hydraulic actuating cylinder 12 inside, the oil storage chamber that a pair of hydraulic packing is arranged in the both sides of piston 13, when input pressure is oily to one of them oil storage chamber from the outside, owing to produced difference of pressure in the both sides of piston, just make piston rod 11 move around, and the above-mentioned rack shaft 2 of the bottom that is connected this piston rod 11 is applied displacing force along axis direction along the long axis direction.
Two oil storage chambers in piston 13 both sides are communicated with a pair of oil transportation mouth 81,82 that is arranged on said gear housing 8 outsides by means of the transport pipe 17,17 that is connected on the hydraulic actuating cylinder 12 outside relevant positions respectively.When in order to turn to during the direction of operating dish, along with said gear axle 1 is applied steering torque, just can in this gear housing 8, carry out corresponding oil supply and oil extraction action, owing in above-mentioned each oil transportation mouth 81,82, known fluid control valve is housed all, so, therefore and the pressure of the hydraulic pressure that produces is added on the rack shaft 2, the said auxiliary power that turns to above just having formed the pressure that outputs to the hydraulic oil of above-mentioned oil transportation mouth 81,82 just enters power hydraulic cylinder 10 by transport pipe 17,17.
When being installed in the pull bar 5,5 of central authorities' output steering hardware on the rack shaft 2 with above-mentioned formation, embed projection 60,60 in the embedded hole 34,34 of protecting sleeve 3, support 6 is installed on the protecting sleeve 3.
At this moment; shown in Fig. 1 (a); the top end part of projection 60,60 is inserted in the embedded hole 34,34 of protecting sleeve 3; again it is compressed into; projection 60,60 top end part be in embedded hole 34,34 state of contact under; at the projection 35,35 on embedded hole 34,34 tops in the direction generation elastic deformation of enlarged-diameter, also such as Fig. 1 (b) shown in, tapered to the inside bend of protecting sleeve 3.
At this moment; embedded hole 34; projection 35 around 34; 35 because pushing has for the first time produced elastic deformation; it is that the very little state of amount that is in the elastic deformation of allowing generation is subjected to new pushing again; in other words; be under than the harder state of initial resilient state, further to push; therefore; above-mentioned projection 35 when pushing for the second time; just produced the phenomenon of unexpected expansion on 35; because this unexpected expansion; make projection 35; 35 no longer bend to the inboard of protecting sleeve 3; but carry out elastic deformation to the direction of enlarged-diameter, just can be securely embedded hole 34; 3 embed embeded slot 61; in 61.(seeing Fig. 1 (e)).
Like this, by means of the pushing to projection 60,60, the projection that just can make protecting sleeve can just embed embedded hole 34,34 in the embeded slot 61,61 at an easy rate by stages to the direction generation elastic deformation of enlarged.Therefore, it is just simple that support 6 is installed to the operation that protecting sleeve 3 gets on, thereby can cost-cutting.
When being installed in support 6 on the protecting sleeve 3 with aforesaid way; the bottom of pull bar 5,5 is sandwiched between the grip block 62,63; mounting screw 7,7 is passed through hole 65 on these two grip blocks 62,63; with the through hole 51 of pull bar 5 bottoms and the centre hole of projection 60,60; again these two mounting screws 7,7 are fastened in the mounting hole 21,21 of rack shaft 2; just can pass through pull bar 5,5, support 6 and mounting screw 7,7 are turning to the bearing circle of usefulness to be installed on the rack shaft 2.
Shown in Fig. 1 (f), when being installed in above-mentioned support 6 on the rack shaft 2 with mounting screw 7,7, above-mentioned projection 35,35 just becomes smooth shape, and the direction that diminishes towards diameter produces elastic deformation.As a result, just embedded hole 34,34 can be pressed onto in the above-mentioned embeded slot 61,61, just improve the leak tightness of embedded hole 34,34 on the protecting sleeve 3 very simply.
In addition, the slip to both direction of rack shaft 2 in the scope that forms above-mentioned window 41 is also owing to above-mentioned connecting cylinder part 32 both sides are that telescopic section 31,31 may become.
In addition, among the embodiment discussed above, be support 6 to be installed on the rack shaft 2 with two mounting screws 7,7, but, as shown in Figure 8, also have another only just can be installed in mounting structure on the rack shaft 2 to support 6 with a screw.
In addition, as Fig. 1 and shown in Figure 7, for support 6 being installed in the mounting screw 7,7 on the rack shaft 2, except becoming the bevelled state the structure of intersecting on the direction of rack shaft 2 axis, can also be as Fig. 9, be the structure that intersects vertically at the axis direction of rack shaft 2.These two kinds of embodiment of Fig. 8 and Fig. 9 are identical with embodiment among Fig. 1-7 basically, thus used identical label, and omitted accompanying drawing and to their explanation.
As mentioned above; by means of first and second aspects of the present invention; owing to the top that embedded hole is arranged on towards exterior projection; so when the embedded hole projection compressed on the protecting sleeve; projection around the embedded hole is in the direction elastic deformation of enlarged-diameter; inside bend to protecting sleeve; under such state; one when the pushing that stops projection; and projection is drawn to the opposite direction of pushing; be at embedded hole under the state in the outside of protecting sleeve; pushing projection again at this moment, makes projection no longer to the inside bend of protecting sleeve; and, embedded hole is embedded in the embeded slot securely to the direction generation elastic deformation of enlarged-diameter.Therefore,, make that the installation exercise of support on protecting sleeve is simple, can reduce the cost of manufacturing as long as, just can embed embedded hole effectively in the embeded slot to projection implementation simple bulldozing operation stage by stage.
And; because the embedded hole of protecting sleeve is arranged on the top of projection; even so embedded hole is made bigger than the external diameter of embeded slot; also can support be installed on the rack shaft enough mounting screws; and when above-mentioned projection became smooth shape, this projection can also produce elastic deformation to the direction that diameter diminishes.Therefore, just can be pressed into embedded hole in the above-mentioned embeded slot, and improve the leak tightness of embedded hole part very simply.
Claims (2)
1. steering hardware; turn to the bearing circle of usefulness on this steering hardware; by having the mounting bracket of the projection that on excircle, is provided with embeded slot; with the mounting screw that passes above-mentioned projection; be connected on the rack shaft mobile along with the operation that turns to; around above-mentioned rack shaft; be provided with the both ends leak free; and the protecting sleeve that can stretch with the embedded hole that embeds above-mentioned embeded slot; it is characterized in that; the retained part that is clamped between support and the rack shaft is formed on the connecting cylinder that connects a pair of telescopic section; above-mentioned embedded hole is arranged on above-mentioned protecting sleeve on the top of the projection of outside protrusion, in case and it produces elastic deformation towards the direction that diameter diminishes after the enlarged-diameter.
2. steering hardware as claimed in claim 1 is characterized in that above-mentioned projection is the taper that diameter diminishes from the bottom to the top.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP325012/1997 | 1997-11-26 | ||
| JP32501297A JP3667060B2 (en) | 1997-11-26 | 1997-11-26 | Steering device |
| JP97-325012 | 1997-11-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1218750A CN1218750A (en) | 1999-06-09 |
| CN1117002C true CN1117002C (en) | 2003-08-06 |
Family
ID=18172161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98124793A Expired - Fee Related CN1117002C (en) | 1997-11-26 | 1998-11-18 | Steering gear |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3667060B2 (en) |
| CN (1) | CN1117002C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4746728B2 (en) * | 1999-12-28 | 2011-08-10 | キーパー株式会社 | Resin steering boots for center take-off type steering devices |
| CN103434564A (en) * | 2013-09-03 | 2013-12-11 | 苏州巴吉赛车科技有限公司 | Steering device |
| JP7063072B2 (en) * | 2018-04-06 | 2022-05-09 | トヨタ自動車株式会社 | Vehicle skeleton structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57174275A (en) * | 1981-04-22 | 1982-10-26 | Tokyo Electric Co Ltd | Print head for dot printer |
| US4428450A (en) * | 1982-09-15 | 1984-01-31 | General Motors Corporation | Rack and pinion steering gear |
| US4601602A (en) * | 1983-07-30 | 1986-07-22 | Trw Ehrenreich Gmbh & Co., Kg | Tie rod joint |
-
1997
- 1997-11-26 JP JP32501297A patent/JP3667060B2/en not_active Expired - Fee Related
-
1998
- 1998-11-18 CN CN98124793A patent/CN1117002C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57174275A (en) * | 1981-04-22 | 1982-10-26 | Tokyo Electric Co Ltd | Print head for dot printer |
| US4428450A (en) * | 1982-09-15 | 1984-01-31 | General Motors Corporation | Rack and pinion steering gear |
| US4601602A (en) * | 1983-07-30 | 1986-07-22 | Trw Ehrenreich Gmbh & Co., Kg | Tie rod joint |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11157460A (en) | 1999-06-15 |
| CN1218750A (en) | 1999-06-09 |
| JP3667060B2 (en) | 2005-07-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| CI01 | Correction of invention patent gazette |
Correction item: Agent Correct: Qin Kaizong False: Tai Kaizong Number: 23 Page: 26 Volume: 15 |
|
| ERR | Gazette correction |
Free format text: CORRECT: AGENT; FROM: THAI KAIZONG TO: QIN KAIZONG |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030806 Termination date: 20091218 |