CN1098783C - Steering apparatus - Google Patents
Steering apparatus Download PDFInfo
- Publication number
- CN1098783C CN1098783C CN98108397A CN98108397A CN1098783C CN 1098783 C CN1098783 C CN 1098783C CN 98108397 A CN98108397 A CN 98108397A CN 98108397 A CN98108397 A CN 98108397A CN 1098783 C CN1098783 C CN 1098783C
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- China
- Prior art keywords
- mentioned
- tube
- tooth bar
- cylinder barrel
- bar shell
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/10—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of power unit
- B62D5/12—Piston and cylinder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/20—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application
- B62D5/22—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application for rack-and-pinion type
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Steering Mechanism (AREA)
Abstract
The steering device has an axially movable rack (1), a cylindrical rack casing (2) to support the rack, and a servo cylinder (3) connected to the casing. A cylindrical tube (31) is co-axial with one end of the casing. A piston rod (30) with a piston (32) on it fits in the cylinder tube and is fixed to the rack. A seal holder (6) is fitted to the connecting point between the rack casing and the tube. The seal holder contains a seal element (60) to seal the middle region of the piston rod. The servo cylinder applies a steering support force to the rack.
Description
The present invention relates to a kind of rack pinion formula steering hardware of central taking-up type, it be with according to steering operation and the middle part of mobile rack shaft be connected on the wheel that turns to usefulness and constitute.
A kind of pattern of the steering hardware of using as automobile is a rack pinion formula steering hardware, it is provided with and bearing circle bonded assembly miniature gears in linkage, by making this miniature gears and the middle part engagement of extending the rack shaft that is provided with along the vehicle body left and right directions, the revolution operational transformation of the bearing circle that turns to usefulness is become moving axially of rack shaft, should move and pass to left and right sides steered wheel (generally passing to front-wheel) and turn to.
This rack pinion formula steering hardware also can roughly be divided into two kinds on end points taking-up type and central taking-up type.The former be with about a pair of tierod of steered wheel bonded assembly be formed by connecting with the both ends of rack shaft respectively, the latter is that the pars intermedia with above-mentioned tierod and rack shaft is formed by connecting.In these steering hardwares, though the longer dimension of the tierod of central authorities' taking-up type steering hardware from roughly the same position to left and right wheels, but the length of the tooth bar shell of rack shaft and supporting rack shaft can shorten, and aspect the setting of the relative position relation of these members and steered wheel bigger degree of freedom is being arranged, therefore can be used on the restricted a part of vehicle of setting of tooth bar shell.
On the other hand, in recent years in order to alleviate the labour's burden that to spend in the bearing circle operation that motor turning uses, generally be equipped with a kind of oil pressure dynamic steering device (power steering device), it is to come the structure of assisted diversion with oil hydraulic cylinder (power cylinder) power that is produced that is configured in a part of steering hardware.
Constitute the rack pinion formula steering hardware of central authorities' taking-up type of oil pressure dynamic steering device, special public clear 51-9978 number in Japanese patent gazette, the spy opens clear 56-128271 number, open clear 57-174275 number in fact, wait in the communique open real public clear 63-12047 number, in these devices, all adopt the auxiliary power cylinder of using of turning to of this structure, promptly, on the side end of rack shaft and on the end, the same side of the tooth bar shell of this rack shaft of supporting, be connected with piston rod and cylinder barrel respectively coaxially, front end at above-mentioned piston rod is installed piston, and with the piston intercalation in cylinder barrel, on the other hand, liquid being carried out in the inside of the above-mentioned cylinder barrel of above-mentioned piston both sides thickly seals.
Aforesaid power steering gear, it is the inboard that the sealing at above-mentioned piston rod middle part is located at the boundary part of tooth bar shell and cylinder barrel, containment members such as oil sealing, O shape circle are embedded on the seal receptacle of short cylinder shape and are keeping, and make the periphery of sealing member and piston rod realize moving contact.
Figure 1A is that explanation is at special public clear 51-9978 number of above-mentioned Japanese patent gazette, the real scheme drawing of opening disclosed hermetically-sealed construction in clear No. 57174275.As shown in the figure, this hermetically-sealed construction is the cylindrical outer casing H that tooth bar shell and cylinder barrel is made of one with the long tube material.Be embedded with seal receptacle S in this shell H, wear locating dowel pin P from the outside of shell H, the combination by this locating dowel pin and seal receptacle makes the seal receptacle location, is embedded in the containment member S on the seal receptacle S
1Contact slidably with the periphery of the piston rod R of the axis part that is configured in shell H, thus with the intermediate seal of this piston rod R.
The scheme drawing of Figure 1B disclosed hermetically-sealed construction that is explanation in special public clear 56-128271 number of above-mentioned Japanese patent gazette.As shown in the figure, this hermetically-sealed construction adopts such seal receptacle S, promptly on its periphery edge the fixedly flange of usefulness is set circumferentially; And tooth bar shell H
1With cylinder barrel H
2Be separately to constitute, above-mentioned flange F is clamped in tooth bar shell H
1With cylinder barrel H
2The end between make their butt joints, from the full week welding of the outside, with tooth bar shell H with this docking section
1With tube H
2Constitute one, and wherein include the seal receptacle S that is provided with above-mentioned flange F.
The scheme drawing of Fig. 1 C disclosed hermetically-sealed construction that is explanation in real public clear 63-12047 number of above-mentioned Japanese patent gazette.As shown in the figure, this hermetically-sealed construction adopts the seal receptacle S same with Figure 1B, promptly on its periphery edge the fixedly flange of usefulness is set circumferentially; And tooth bar shell H
1With cylinder barrel H
2Be separately to constitute, above-mentioned flange F is clamped in tooth bar shell H
1With cylinder barrel H
2The end between make their the butt joint, at cylinder barrel H
2The same side end outside on captive nut N is installed freely to rotate, at tooth bar shell H
1The periphery of same side end on form the threaded portion, by making captive nut N and threaded portion in conjunction with tightening the said fixing nut N, with tooth bar shell H
1With cylinder barrel H
2Constitute one, wherein comprise the seal receptacle S that is provided with above-mentioned flange F.
; in first kind of hermetically-sealed construction shown in above-mentioned Figure 1A, must carry out a kind of miscellaneous positioning operation; the position that promptly, seal receptacle S is embedded into regulation from the side opening end of the shell H of lengthwise; specifically need be sent to the position that locating dowel pin P is set, thereby problem bothersome when positioning operation is arranged.
In second, third kind hermetically-sealed construction shown in Figure 1B and Fig. 1 C, because the tooth bar shell H that constitutes dividually
1With cylinder barrel H
2Butt joint is clamped in seal receptacle S between the end and fix, thereby has just solved the problem that take a lot of trouble above-mentioned seal receptacle S location, still, following described problem is arranged respectively.
In second kind of hermetically-sealed construction shown in Figure 1B, tooth bar shell H
1With cylinder barrel H
2The seal receptacle S that is and is clamped between them forms one, when welding for they are formed one, because of the heat that welds can be delivered to the containment member S that is embedded on the seal receptacle S
1On, so can cause the above-mentioned containment member S that constitutes by the general relatively poor material of resistance to effect of heat such as rubber, resin
1Distortion, state variation such as rotten have the problem that can not obtain desired sealing property.
Therefore, be actually and adopt such assembling sequence, promptly, tooth bar shell H
1With cylinder barrel H
2After in the welding, again with containment member S
1After be added on the seal receptacle S that is welded between them.But, adding sealing member S in proper order by this
1The time, be from cylindrical drum H
2A side opening end with sealing member S
1Send into refill with other end all-in-one-piece seal receptacle S on.This point be with first kind of hermetically-sealed construction in the location of seal receptacle S same, bothersome problem is arranged.
In the third hermetically-sealed construction shown in Fig. 1 C, owing to be by tightening of captive nut N and with tooth bar shell H
1With cylinder barrel H
2Constitute one, seal receptacle S is not heated, thereby can be at containment member S
1The state that is contained on the seal receptacle S forms one down.But, because must be at tooth bar shell H
1Outer peripheral face on process and tighten the screw thread that captive nut N uses, at cylinder barrel H
2On be provided with and can turn round freely pivot and prop up fixedly that the pivot of nut N props up mechanism, thereby the bothersome problem of these members of processing is arranged.
The present invention proposes for the problems referred to above that solve the prior art existence, its objective is provides a kind of hermetically-sealed construction, it is the rack pinion formula steering hardware of central authorities' taking-up type to be constituted under the situation of power steering gear, the seal receptacle that the pars intermedia of packed-piston bar is used is assembled between tooth bar shell that supports rack shaft and the cylinder barrel that constitutes power cylinder, and can process without difficultyly, can easily form one, can obtain excellent sealing performance with simple structure.
The steering hardware of the present invention that proposes is a rack pinion formula steering hardware in order to achieve the above object, it is provided with the miniature gears that is connected with bearing circle, make rack tooth and this pinion on the rack shaft, cylinder barrel is connected coaxially can be freely towards a side that supports the tubular tooth bar shell of above-mentioned rack shaft with moving axially, the piston of intercalation in this cylinder barrel is installed in the front end of piston rod, this piston rod is to be connected with on the same side of above-mentioned rack shaft, connecting portion at above-mentioned tooth bar shell and cylinder barrel disposes seal receptacle, thickly seal the pars intermedia of above-mentioned piston rod by remaining on containment member liquid on the sealing seat, will turn to auxiliary force to be added to power cylinder on the above-mentioned rack shaft thereby constitute.In addition, the end of a side in above-mentioned tooth bar shell or the cylinder barrel is embedded in the ca(u)lk tube that is connected with coaxially on the opposing party's end face, from the outside with the perisporium ca(u)lk of ca(u)lk tube above-mentioned tooth bar shell and cylinder barrel are coupled together, make the part of above-mentioned seal receptacle be clamped in above-mentioned ca(u)lk tube inboard mutually facing to above-mentioned tooth bar shell and the end face of cylinder barrel between and seal receptacle is fixed.
Like this, steering hardware of the present invention is that the end of the side in seal receptacle and above-mentioned tooth bar shell or the cylinder barrel is embedded in the ca(u)lk tube that is connected with coaxially on the opposing party's end face, in the inboard of ca(u)lk tube the part of seal receptacle is clamped between the end face of the end face of tooth bar shell and cylinder barrel, in this state, by from the outside with ca(u)lk tube ca(u)lk, tooth bar shell and cylinder barrel are linked into an integrated entity, meanwhile seal receptacle is located.Owing to be that the end of the side in above-mentioned tooth bar shell or the cylinder barrel is embedded in the ca(u)lk tube that is connected with coaxially on the opposing party's end face, the seal receptacle of the pars intermedia of packed-piston bar is embedded between the two, and under this state, ca(u)lk tube ca(u)lk is connected them, thereby when assembling and processing seal receptacle, can determine to form reliably one without difficultyly, just can obtain excellent sealing performance with simple structure.
In addition, also can form the ca(u)lk tube on any one party that is arranged in tooth bar shell and the cylinder barrel and the above two dividually, couple together, the above-mentioned side's of also available cutting end and form one with associated methods such as welding.
Also can chase be set, above-mentioned ca(u)lk tube ca(u)lk be constituted at the chase place at the fitting portion upper edge of the opposing party in any one party in being embedded into tooth bar shell and cylinder barrel circumference.
Also can be by on above-mentioned seal receptacle, holding flange being set, and it is clamped between the connection end face of tooth bar shell and cylinder barrel and constitutes.
Above-mentioned purpose of the present invention and other purpose and feature are by will be clearer below in conjunction with the description of the drawings.
Brief description of drawings is as follows:
Figure 1A, Figure 1B, Fig. 1 C are the scheme drawings of the existing enclosed construction of explanation;
Fig. 2 is the biopsy cavity marker devices front view of the structure of the steering hardware main portion that the present invention relates to of expression;
Fig. 3 is near the amplification view the connecting portion of the used tierod of the steering hardware that the present invention relates to of expression;
Fig. 4 is the birds-eye view of the used protective case characteristic of the steering hardware that the present invention relates to;
Fig. 5 A, Fig. 5 B are the scheme drawings that explanation is installed to mounting bracket the sequence of erection on the used protective case of the steering hardware that the present invention relates to;
Fig. 6 is near the amplification view the protective case installation site of the used cylinder barrel side of the steering hardware that the present invention relates to;
Fig. 7 is the birds-eye view of characteristic of another embodiment of the used protective case of the steering hardware that the present invention relates to of expression;
Fig. 8 is near the amplification view the connecting bridge of used cylinder barrel of the steering hardware that the present invention relates to and tooth bar shell;
Fig. 9 A, Fig. 9 B, Fig. 9 C are the scheme drawings of assembling sequence of the connecting portion of used cylinder barrel of the steering hardware that the present invention relates to of explanation and tooth bar shell;
Figure 10 is near the amplification view the connecting bridge of used piston rod of the steering hardware that the present invention relates to and rack shaft;
Figure 11 A, Figure 11 B are the scheme drawings of assembling sequence of the connecting portion of used piston rod of the steering hardware that the present invention relates to of explanation and rack shaft.
Below, explain the present invention with reference to the accompanying drawing of representing embodiments of the invention.
Fig. 2 is the biopsy cavity marker devices front view of the structure of the steering hardware main portion that the present invention relates to of expression.
Among the figure, the 1st, rack shaft, this rack shaft 1 can be bearing in the inside of tooth bar shell 2 with moving freely vertically, and tooth bar shell 2 is cylinders that a side end is closed.Middle part at tooth bar shell 2 closed ends is being connected miniature gears cover 20 across with it, and the inside at this miniature gears cover 20 can pinion shaft 21 around the axle center free rotaring ground supporting.Give prominence in the upper end of the pinion shaft 21 on the top of miniature gears cover 20 and be connected, this pinion shaft 21 can be turned round around axle along with the operation of the above-mentioned bearing circle 2a that turns to usefulness with bearing circle 2a.
Be provided with the rack tooth 1a that forms along suitable length in the periphery of rack shaft 1, be integrally formed into miniature gears 21a at the lower part of above-mentioned pinion shaft 21, in the crossover sites of rack tooth 1a and miniature gears cover 20, above-mentioned rack tooth 1a and miniature gears 21a engagement.By this engagement, just can be transformed into moving axially of rack shaft 1 to revolution with the corresponding pinion shaft 21 of the operation of bearing circle 2a.
On the other hand, opposite side at tooth bar shell 2, excise and formation fenestra 22 along the perisporium of the length range of stipulating this shell, rack shaft 21 exposes outside at tooth bar shell 2 through this fenestra 22, connecting the base end part of a pair of tierod 4,4 on near the periphery the side end at this rack shaft 1, this a pair of tierod be by by the mounting bracket 41 of a pair of tie bolt 40,40 screw threads for fastening with about steered wheel be connected.Like this, just can will turn to as the mobile left and right sides steered wheel that passes to of the above-mentioned rack shaft that produces 1 by this a pair of tierod 4,4.
Fig. 3 is near the amplification view of connecting portion of tierod 4,4.As shown in the figure, on a surface for mounting bracket 41 that tierod 4,4 usefulness are installed, give prominence to with being spaced from each other certain-length pair of bolts guide 42,42 is being set, connect ground at their axis parts and form pilot hole 43,43, the size of these pilot holes can be inserted above-mentioned tie bolt 40,40.
On the other hand; protective case 5 in fenestra 22 outer side covers; in the substantial middle portion of the cylindrical portion 5a of protective case 5, assembling the stationary member 5c that constitutes by materials such as whippy rubber with being integral; on this stationary member 5c, along the length direction of cylindrical portion 5a certain-length and form a pair of boarding hole 50,50 (with reference to Fig. 4, Fig. 5) at interval.
Fig. 4 is the birds-eye view of expression cylindrical portion 5a outward appearance.As shown in the figure, said fixing member 5c has oval-shaped aspect, wherein include the position that forms boarding hole 50,50, as shown in Figure 3, to be embedded into along the chase of stationary member outer rim setting on the inner edge of the boarding hole that forms on the above-mentioned position of cylindrical portion 5a, and said fixing member 5c be combined with above-mentioned cylindrical portion 5a with being integral with suitable method such as bonding grade.
Will the isolation between the boarding hole 50,50 that forms on the stationary member 5c set for and mounting bracket 41 on above-mentioned bolt guide 42,42 between isolation about equally; the outstanding face that is provided with by making bolt guide 42,42 is towards protective case 5 sides; near the setting-in of base end part that makes these bolt guides 42,42 is installed in mounting bracket 41 on the above-mentioned protective case 5 to 50,50 li of above-mentioned boarding holes with being integral.
On by the side face of the rack shaft 1 of the inboard of the above-mentioned fenestra 22 of above-mentioned protective case 5 coverings; form areal of support 10,10; under above-mentioned confined state; areal of support is can be contacted with the front end of giving prominence at the bolt guide 42,42 of protective case 5 inboards; in the pilot hole 43,43 that on two bolt guides 42,42, forms; combine by inserting screw 11,11 screw threads lead to formation on the tie bolt in this bolt pilot hole 40,40 and above-mentioned areal of support 10,10, and above-mentioned protective case 5 is fixed on mounting bracket 41 on the rack shaft 1 with being clipped in the middle.
Above-mentioned tie bolt 40,40 insert lead to about the base end part of rotation intermediate rod 4,4 on, and insert together and lead to 43,43 li of above-mentioned pilot holes, combine with the pars intermedia screw thread of rack shaft 1 as described above.Thus, by mounting bracket 41 above-mentioned tierod 4,4 is assembled on the rack shaft 1 with protective case 5, the two-way of the rack shaft 1 that the flexible permission of pars contractilis 5b, the 5b of above-mentioned cylindrical portion 5a both sides produces in the formation scope of above-mentioned fenestra 22 moved.
Fig. 5 A, Fig. 5 B are the scheme drawings that explanation is installed to mounting bracket the sequence of erection on the protective case.As shown in Figure 3, relatively the head direction of closing tilts along making separately the axle center of the tie bolt 40,40 that connects tierod 4,4 and rack shaft 1, the bolt guide 42,42 of the guide 43,43 that is provided with above-mentioned tie bolt 40,40 give prominence to be arranged to make them front end to opening the direction inclination.
As shown in Figure 3; because these bolt guides 42,42 are assembled into following state; promptly, will be inlaid on the protective case 5 50,50 li of each boarding holes of forming near each base end part, thereby the interval I between the boarding hole 50,50 set for the gap length L between the base end part with the bolt guide 42,42 at final formation setting-in position
1Consistent.Shown in Fig. 5 A, though it is to begin to carry out from separately front that bolt guide 42,42 is embedded into the action of this boarding hole 50,50, but, because bolt guide the 42, the 42nd makes leading section give prominence to setting as described above with outwards opening, thereby the interval L on these leading sections
2Bigger than the interval I between the boarding hole 50,50, the latter sets the base end side gap length L that makes peace greatly for
1Equate.
Therefore; the part of protective case 5 that just will comprise the formation position of boarding hole 50,50 uses the stationary member 5c that makes than the more whippy material of other parts to constitute; like this; when the leading section with bolt guide 42,42 embeds; just can be at the elastic range of said fixing member 5c with the interval I between the interior adjusting boarding hole 50,50, can make the interval L of itself and bolt guide 42,42 front ends
2Coincide, can easily carry out above-mentioned embedding action.
And, by above-mentioned embedding action, under mounting bracket 41 is in installing condition shown in Fig. 5 B, because the recovery of elasticity of stationary member 5c, thereby above-mentioned boarding hole 50,50 can be entrenched on the base end part of bolt guide 42,42 infalliblely, do not make the problem of the leak tightness damaged on this telescoping part.
Because so the stationary member 5c of assembling mounting bracket 41 is clamped between mounting bracket 41 and the rack shaft 1 as illustrated in fig. 3 by tie bolt 40,40 being tightened on the rack shaft 1, thereby can not be out of shape along with moving of rack shaft 1, can keep the chimerism of bolt guide 42,42 well.
As shown in Figure 2; above-mentioned protective case 5 is on the end of pars contractilis 5b, the 5b of both sides; be provided with circular installation ring 5d, 5d; by they being inlaid in the outside, both sides of above-mentioned fenestra 22, and they being fastened from the outside with tightening belt 9,9 (with reference to Fig. 6) and be mounted to above-mentioned fenestra 22 outside states that cover.
In graphic steering hardware, be connected with the cylinder barrel 31 that constitutes power cylinder 3 at a side end of tooth bar shell 2, when carrying out above-mentioned installation, respectively installation ring 5d, the 5d of both sides are inlaid in the tooth bar shell 2 with various outer diameter and the outside of cylinder barrel 31.
Fig. 6 is near the amplification view in installation site of the protective case 5 of cylinder barrel 31 1 sides.As shown in the figure, on the relevant position of the installation protective case 5 of cylinder barrel 31, setting-in is being fixed circular set collar 39, and the installation ring 5d of this side is inlaid in this set collar 39 outsides, is fastened and is fixed by tightening belt 9.
Set collar 39 has approximately and the external diameter external diameter about equally of tooth bar shell 2; this tooth bar shell 2 constitutes the installation position of opposite side installation ring 5d; use installation ring 39; can make installation ring 5d, the 5d of protective case 5 both sides have same outer diameter as; when this protective case 5 is installed, needn't consider its directivity, can prevent trouble before it happens the situation that assembly failure takes place.In addition, can also be tightening belt 9 sharings of the installation ring 5d, the 5d that fasten both sides, thus assembling operation can be carried out easily.
Though only on the circumferential part of cylindrical portion 5a, oval stationary member 5c is installed as another member, and on this stationary member 5c, form boarding hole 50,50, as long as but the connecting element 5c that constitutes another member contains the formation position of boarding hole 50,50, then can make Any shape.
Fig. 7 is the birds-eye view of characteristic of another embodiment of expression protective case.For example, can be contained on the middle body of cylindrical portion 5a, and on this stationary member 5c, form boarding hole 50,50 making circular stationary member 5c.
In addition, on the end face of the rack shaft 1 that connects tierod 4,4 these sides, be connected with piston rod as described below 30 coaxially with it, and on the end of the same side of tooth bar shell 2, be connected with cylinder barrel 31 coaxially with it, constitute the power cylinder 3 that turns to auxiliary usefulness thus.
As mentioned above, power cylinder 3 is the oil pockets that formed a pair of liquid-tight seal in the inboard of cylinder barrel 31 by the both sides of piston 32, pressure oil supplied with this oil pocket from the outside, according to the oil pressure of supplying with, the differential pressure action that is produced by piston 32 both sides and the above-mentioned piston rod 30 of push-and-pull vertically is added to axial displacing force on the above-mentioned rack shaft 1 that is connected with the cardinal extremity of this piston rod 30 thus.
The oil pocket of piston 32 both sides send oil pipe 23,23 by each bar that respectively should be on the relevant position in cylinder barrel 31 outsides, linked to each other with a pair of oilhole mouth 24,25 that send on a pair of outside that is arranged on above-mentioned miniature gears cover 20.20 li known pressure control valve is housed at this miniature gears cover, it carries out the row's of giving action of pressure oil along with the bearing circle operation that turns to usefulness and according to the operation torque that is added on the above-mentioned pinion shaft 21, and supplies with above-mentioned in the oilhole mouth 24,25 any one of sending; Supply send the pressure oil output of oilhole mouth 24,25 to supply with power cylinder 3 through sending oil pipe 23,23, and the oil pressure that is produced by this supply is applied on the rack shaft 1, and above-mentioned turning to assisted.
Fig. 8 constitutes the cylinder barrel 31 of aforesaid power cylinder 3 and near the amplification view of connecting bridge of tooth bar shell 2.The present invention also can be clamped in seal receptacle 6 between the two and connects.
Be connected with ca(u)lk tube 7 coaxially on the connection side end of tooth bar shell 2, make peace the greatly external diameter of cylinder barrel 31 of its internal diameter equates.This ca(u)lk tube 7 can constitute one as shown in figure by the internal operation of tooth bar shell 2, and also suitable bonding method such as available welding constitutes the cylindrical shell with certain internal diameter with being connected the side end combination of tooth bar shell 2.
On the other hand, in the periphery of cylinder barrel 31 and leaving on the position that connects the side end face certain-length, be provided with along the low-lying chase 37 in circumference concavity ground.This chase 37 can form by suitable job operation such as plastic working or cutting from the outside of cylinder barrel 31.
Fig. 9 is the scheme drawing of assembling sequence of the connecting portion of explanation cylinder barrel 31 and tooth bar shell 2.Shown in Fig. 9 A, the seal receptacle 6 with said structure is the inboard that side end that oil sealing 60 is housed is embedded into above-mentioned cylinder barrel 31 inwardly, be connected contacted position, side end face up to said fixing flange 61 and cylinder barrel.After this, shown in Fig. 9 B, the above-mentioned connection side end of cylinder barrel 31 is pressed into the inboard of setting-in to the above-mentioned ca(u)lk tube 7 that is connected with tooth bar shell 2, said fixing flange 61 is clamped between the end face of the end face of cylinder barrel 31 and tooth bar shell 2, makes above-mentioned seal receptacle location, under this state, shown in Fig. 9 C, on above-mentioned chase 37 relevant positions of cylinder barrel 31 peripheries, with above-mentioned ca(u)lk tube 7 ca(u)lks, thus tooth bar shell 2 is connected with cylinder barrel 31 from the outside.
After this, piston rod 30 is inserted in this assembly, piston 32 is fixed on the end of the above-mentioned piston rod 30 that extends to cylinder barrel 31 inboards with locking double-screw bolt 34, package has seal ring 33 on piston 32, then, on one side the outside of inner core 36 setting-ins, be inserted into the inboard of cylinder barrel 31 on one side to above-mentioned piston 32, the front end trip of this inner core 36 is embedded on the above-mentioned stage portion of seal receptacle 6, constitutes power cylinder 3 as shown in Figure 8 thus.
As mentioned above, by that side that oil sealing 60 is housed is embedded into cylinder barrel 31 inboards, make the seal receptacle 6 of installation be subjected to radial constraint, make it be subjected to axial constraint by holding flange 61 being clipped in the middle again with cylinder barrel 31 and tooth bar shell 2, like this, remaining on inboard oil sealing 60 just can guarantee with the installing condition that the slip of piston rod 30 is joined.Again because the installation of this seal receptacle 6 is with tooth shell 2 and cylinder barrel 31 bonded assemblys, so be difficult for taking place as the distortion of the oil sealing 60 of containment member, state variation such as rotten thereupon by from the outside ca(u)lk tube 7 being carried out ca(u)lk.
Though in the present embodiment ca(u)lk tube 7 is connected with in the end of tooth bar shell 2, and cylinder barrel 31 is inlaid in the inside of ca(u)lk tube,, also can be connected with ca(u)lk tube 7 in the end of cylinder barrel 31 in contrast, tooth bar shell 2 is inlaid in the inside of this ca(u)lk tube 7.
Figure 10 constitutes the piston rod 30 of aforesaid power cylinder 3 and near the amplification view of connecting bridge of rack shaft 1; Figure 11 is the scheme drawing of assembling sequence of the connecting portion of explanation piston rod 30 and rack shaft 1.
As shown in the figure, form joint portion 35 coaxially at the connection side end of piston rod 30 and its.This joint portion 35 is continuous with distolateral cylindrical portion, and the outside face with part of sphere, and the center of sphere forms serration on whole outer surface on the axle center of piston rod 30, and is continuous with the outer peripheral face of piston rod 30 by necking part 38.
On the other hand, on the axle center part of the connection side end of rack shaft 1, outstandingly coaxially be provided with ca(u)lk tube 8 with it, its inner diameter d is slightly littler than the maximum outside diameter D of the above-mentioned joint portion 35 of piston rod 30.This ca(u)lk tube 8 can be made of one by cutting and this rack shaft 1 from rack shaft 1 end, and also suitable bonding method such as available welding constitutes the cylindrical shell with certain internal diameter with being connected the side end combination of rack shaft 1.
Shown in Figure 11 A, after joint portion 35 on the connection end that is arranged on piston rod 30 being embedded in the ca(u)lk tube 8 on the connection end that is arranged on rack shaft 1 highlightedly, shown in Figure 11 B, on the relevant position of the necking part 38 of joint portion 35 ends, by load onto the perisporium ca(u)lk of stating ca(u)lk tube 8 from the outside, as shown in figure 10,35 armfuls of joint portions in ca(u)lk tube 8 inboards, in this state, piston rod 30 and the rack shaft 1 that as above constitutes coupled together.
When connecting like this, because the inner diameter d of the combined hole 80 of ca(u)lk tube 8 inboards is littler than the maximum outside diameter D of joint portion 35, and on 35 outsides, joint portion, form serration, thereby when being embedded into joint portion 35 in the ca(u)lk tube 8, serration when mutually combining on 35 peripheries of joint portion bites on the inner peripheral surface of ca(u)lk tube 8, after this, can with ca(u)lk tube 8 ca(u)lks state under, live the relative revolution of piston rod 30 and rack shaft 1 by above-mentioned serration in conjunction with constraint.
Though the front end of piston rod 30 extends to the inboard of cylinder barrel 31, and by the locking of jam nut 34 piston 32 is installed on this elongated end as described above, but be in restrained state owing to be connected the revolution that makes piston rod 30 by piston rod 30 and tooth bar 1 above-mentioned, thereby can easily lock above-mentioned jam nut 34, and can not influence above-mentioned coupled condition by this locking from the front of piston rod 30.
Again because sphere is contained in the outside of joint portion 35, thereby can slide along its length and fascinate in the inboard of ca(u)lk tube 8 in joint portion 35 along with serration, even above-mentioned piston rod 30 is under the above-mentioned coupled condition, the axle center is rack shaft 1 displacement obliquely relatively still.
Therefore, under assembled state shown in Figure 2, the concentricity that can keep cylinder barrel 31 and piston 32 by the inclination of above-mentioned piston rod 30 accurately, can slide smoothly at cylinder barrel 31 inboard pistons 32, can prevent the friction loss of in-between seal ring 33 effectively, can prevent that the life-span of power cylinder 3 from reducing.
Because under the situation that does not break away from essential characteristic of the present invention, also can there be multiple mode to implement the present invention, so top said one embodiment of the present of invention just for the present invention is described, and are not the restriction to it.Because protection scope of the present invention determined by claims, rather than determined by top description, thereby all changes are also all in the claim scope or suitable with it, and this all is comprised in the claim scope.
Claims (18)
1. steering hardware comprises: according to steering operation and the rack shaft that moves vertically; Support the tubular tooth bar shell of this rack shaft; With this tooth bar shell bonded assembly power cylinder, this power cylinder has: with an end of above-mentioned tooth bar shell bonded assembly cylinder barrel coaxially; The piston rod of inserting logical above-mentioned cylinder barrel and being connected with above-mentioned rack shaft; Be installed in the front end and the piston of intercalation in above-mentioned cylinder barrel of above-mentioned piston rod; Be configured in the seal receptacle on the connecting portion of above-mentioned tooth bar shell and cylinder barrel; Keep above-mentioned seal receptacle and liquid thickly to seal the containment member of the pars intermedia of above-mentioned piston rod, wherein, will turn to auxiliary force to be added on the above-mentioned rack shaft by above-mentioned power cylinder; Described steering hardware is provided with ca(u)lk tube that is connected with coaxially on the end face of the side in above-mentioned tooth bar shell or cylinder barrel and the chase that is formed on the opposing party end, the described end that has chase is fitted in the described ca(u)lk tube, above-mentioned tooth bar shell is connected with cylinder barrel from the outside with the perisporium ca(u)lk of described ca(u)lk tube at described chase place, make the part of above-mentioned seal receptacle be clamped in above-mentioned ca(u)lk tube inboard mutually facing to above-mentioned tooth bar shell and the end face of cylinder barrel between and seal receptacle is fixed.
2. steering hardware as claimed in claim 1 is characterized in that: above-mentioned ca(u)lk tube is to be welded on the end face of above-mentioned tooth bar shell.
3. steering hardware as claimed in claim 1 is characterized in that: above-mentioned ca(u)lk tube is to be welded on the end face of above-mentioned cylinder barrel.
4. steering hardware as claimed in claim 1 is characterized in that: above-mentioned ca(u)lk tube is by the end inside face hole enlargement of above-mentioned tooth bar shell is formed one with above-mentioned tooth bar shell.
5. steering hardware as claimed in claim 1 is characterized in that: above-mentioned ca(u)lk tube is by the end inside face hole enlargement of above-mentioned cylinder barrel is formed one with above-mentioned cylinder barrel.
6. steering hardware as claimed in claim 1 is characterized in that: above-mentioned cylinder barrel has described chase, and it is along being arranged on the chimeric position of above-mentioned ca(u)lk tube circumferentially, by what above-mentioned ca(u)lk tube ca(u)lk was combined with this ca(u)lk tube.
7. steering hardware as claimed in claim 1 is characterized in that: above-mentioned tooth bar shell has described chase, and it is along being arranged on the chimeric position of above-mentioned ca(u)lk tube circumferentially, by what above-mentioned ca(u)lk tube ca(u)lk was combined with this ca(u)lk tube.
8. steering hardware as claimed in claim 6, it is characterized in that: above-mentioned seal receptacle is embedded in the above-mentioned cylinder barrel, and it has on the end that is arranged on above-mentioned tooth bar shell side coaxially, be embedded in the above-mentioned ca(u)lk tube and be clamped in holding flange between the end face of above-mentioned tooth bar shell and cylinder barrel.
9. steering hardware as claimed in claim 7, it is characterized in that: above-mentioned seal receptacle is embedded in the above-mentioned tooth bar shell, and it has on the end that is arranged on above-mentioned cylinder barrel side coaxially, be embedded in the above-mentioned ca(u)lk tube and be clamped in holding flange between the end face of above-mentioned cylinder barrel and tooth bar shell.
10. steering hardware comprises: bearing circle; The pinion shaft that is connected with bearing circle; Be arranged on the miniature gears on this pinion shaft coaxially; Form and the rack tooth of pinion and the rack shaft that moves vertically according to the steering operation of bearing circle; The tubular tooth bar shell that can hold this rack shaft vertically with moving freely; With this tooth bar shell bonded assembly power cylinder, above-mentioned power cylinder has: with an end of above-mentioned tooth bar shell bonded assembly cylinder barrel coaxially; The piston rod of inserting logical above-mentioned cylinder barrel and being connected with above-mentioned rack shaft; Be installed in the front end and the piston of intercalation in above-mentioned cylinder barrel of above-mentioned piston rod; Be configured in the seal receptacle on the connecting portion of above-mentioned tooth bar shell and cylinder barrel; Keep above-mentioned seal receptacle and liquid thickly to seal the containment member of the pars intermedia of above-mentioned piston rod, wherein, thickly seal by above-mentioned piston both sides liquid and form a pair of grease chamber, poor according to the oil pressure that the oil pressure size of giving this a pair of grease chamber produces, the auxiliary rack axle moves in the axial direction, and this rack shaft is connected on the above-mentioned piston by piston rod; Described steering hardware is provided with ca(u)lk tube that is connected with coaxially on the end face of the side in above-mentioned tooth bar shell or cylinder barrel and the chase that is formed in end of the opposing party, the described end that has chase is fitted in the described ca(u)lk tube, above-mentioned tooth bar shell is connected with cylinder barrel from the outside with the perisporium ca(u)lk of described ca(u)lk tube at described chase place, make the part of above-mentioned seal receptacle be clamped in above-mentioned ca(u)lk tube inboard mutually facing to above-mentioned tooth bar shell and the end face of cylinder barrel between and seal receptacle is fixed.
11. steering hardware as claimed in claim 10 is characterized in that: above-mentioned ca(u)lk tube is to be welded on the end face of above-mentioned tooth bar shell.
12. steering hardware as claimed in claim 10 is characterized in that: above-mentioned ca(u)lk tube is to be welded on the end face of above-mentioned cylinder barrel.
13. steering hardware as claimed in claim 10 is characterized in that: above-mentioned ca(u)lk tube is by the end inside face hole enlargement of above-mentioned tooth bar shell is formed one with above-mentioned tooth bar shell.
14. steering hardware as claimed in claim 10 is characterized in that: above-mentioned ca(u)lk tube is by the end inside face hole enlargement of above-mentioned cylinder barrel is formed one with above-mentioned cylinder barrel.
15. steering hardware as claimed in claim 10 is characterized in that: above-mentioned cylinder barrel has described chase, and it is along being arranged on the chimeric position of above-mentioned ca(u)lk tube circumferentially, by what above-mentioned ca(u)lk tube ca(u)lk was combined with this ca(u)lk tube.
16. steering hardware as claimed in claim 10 is characterized in that: above-mentioned tooth bar shell has described chase, and it is along being arranged on the chimeric position of above-mentioned ca(u)lk tube circumferentially, by what above-mentioned ca(u)lk tube ca(u)lk was combined with this ca(u)lk tube.
17. steering hardware as claimed in claim 15, it is characterized in that: above-mentioned seal receptacle is embedded in the above-mentioned cylinder barrel, and it has on the end that is arranged on above-mentioned tooth bar shell side coaxially, be embedded in the above-mentioned ca(u)lk tube and be clamped in holding flange between the end face of above-mentioned tooth bar shell and cylinder barrel.
18. steering hardware as claimed in claim 16, it is characterized in that: above-mentioned seal receptacle is embedded in the above-mentioned tooth bar shell, and it has on the end that is arranged on above-mentioned cylinder barrel one side coaxially, be embedded in the above-mentioned ca(u)lk tube and be clamped in holding flange between the end face of above-mentioned cylinder barrel and tooth bar shell.
Applications Claiming Priority (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP129635/97 | 1997-05-20 | ||
| JP129635/1997 | 1997-05-20 | ||
| JP12963497A JP3998754B2 (en) | 1997-05-20 | 1997-05-20 | Steering device |
| JP12963597A JP3489019B2 (en) | 1997-05-20 | 1997-05-20 | Steering gear |
| JP129634/1997 | 1997-05-20 | ||
| JP12963397A JP3744647B2 (en) | 1997-05-20 | 1997-05-20 | Steering device |
| JP129633/1997 | 1997-05-20 | ||
| JP129633/97 | 1997-05-20 | ||
| JP129634/97 | 1997-05-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1199686A CN1199686A (en) | 1998-11-25 |
| CN1098783C true CN1098783C (en) | 2003-01-15 |
Family
ID=27315972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98108397A Expired - Fee Related CN1098783C (en) | 1997-05-20 | 1998-05-20 | Steering apparatus |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1098783C (en) |
| DE (1) | DE19822313B4 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10314242A1 (en) * | 2003-03-29 | 2004-11-18 | Zf Lenksysteme Gmbh | servo cylinder |
| DE202004001740U1 (en) * | 2004-02-05 | 2004-06-09 | Trw Automotive Gmbh | Rack and pinion steering, especially for lighter trucks |
| DE502008001720D1 (en) | 2007-04-19 | 2010-12-16 | Thyssenkrupp Presta Ag | RACK or THREADED ROD |
| DE102007018919A1 (en) * | 2007-04-19 | 2008-10-23 | Thyssenkrupp Presta Ag | Rack or threaded rod |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3886849A (en) * | 1973-12-03 | 1975-06-03 | Trw Inc | Power steering system |
| EP0178128A2 (en) * | 1984-10-10 | 1986-04-16 | Adwest Engineering Limited | Rack and pinion steering mechanism for a motor vehicle |
| US4721175A (en) * | 1985-12-06 | 1988-01-26 | Trw Cam Gears Limited | Rack and pinion steering gear assembly |
| US5495711A (en) * | 1994-12-07 | 1996-03-05 | General Motors Corporation | Tuner hose assembly for power steering system |
| US5505276A (en) * | 1994-10-20 | 1996-04-09 | Trw Inc. | Poer steering system with minimum pressure maintained within the power steering motor |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3709099A (en) * | 1970-08-11 | 1973-01-09 | Trw Inc | Convertible rack and pinion steering gear |
| DE8006444U1 (en) * | 1980-03-08 | 1982-01-14 | Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen | Rack and pinion steering |
| GB2071033B (en) * | 1980-03-08 | 1984-05-02 | Zahnradfabrik Friedrichshafen | Hydraulic rack-an-pinion steering system |
| JPS6312047Y2 (en) * | 1980-03-12 | 1988-04-07 | ||
| JPS57174275U (en) * | 1981-04-30 | 1982-11-02 | ||
| DE8404477U1 (en) * | 1984-02-15 | 1985-08-14 | Adam Opel AG, 6090 Rüsselsheim | Servo vehicle steering device |
| JP3316834B2 (en) * | 1993-10-29 | 2002-08-19 | 豊田工機株式会社 | Rack and pinion type power steering device |
-
1998
- 1998-05-19 DE DE1998122313 patent/DE19822313B4/en not_active Expired - Fee Related
- 1998-05-20 CN CN98108397A patent/CN1098783C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3886849A (en) * | 1973-12-03 | 1975-06-03 | Trw Inc | Power steering system |
| EP0178128A2 (en) * | 1984-10-10 | 1986-04-16 | Adwest Engineering Limited | Rack and pinion steering mechanism for a motor vehicle |
| US4721175A (en) * | 1985-12-06 | 1988-01-26 | Trw Cam Gears Limited | Rack and pinion steering gear assembly |
| US5505276A (en) * | 1994-10-20 | 1996-04-09 | Trw Inc. | Poer steering system with minimum pressure maintained within the power steering motor |
| US5495711A (en) * | 1994-12-07 | 1996-03-05 | General Motors Corporation | Tuner hose assembly for power steering system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1199686A (en) | 1998-11-25 |
| DE19822313A1 (en) | 1998-11-26 |
| DE19822313B4 (en) | 2009-10-15 |
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| SE01 | Entry into force of request for substantive examination | ||
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Granted publication date: 20030115 Termination date: 20140520 |