CN201305013Y - Steering column - Google Patents

Abstract

The utility model relates to a steering column; a rotating axis can be free from a rotating shaft or a rotating shaft component; two side walls of a front section clamping part are provided with an arc front section long hole, and at least one side wall is provided with a contact surface; both side walls of a rear section clamping part are provided with an arc rear section long hole, and at least one side wall forms a contact area; the arc center of the front section long hole stays on the same straight line with the arc center of the rear section long hole, and the straight line is overlapped with the rotating axis of a bushing; at least two opposite contact areas are vertical to the rotating axis of the bushing, and the rotating axis is fixed corresponding to the front section clamping part or the rear section clamping part.

Description

A kind of Steering gear

Technical field

The utility model relates to a kind of steering column for vehicles.

Background technology

There has been multiple height-adjustable Steering gear to emerge at present.Name be called " location adjusting device of bearing circle " (POSITION ADJUSTING DEVICE FOR STEERING WHEELS), the patent No. be the US Patent of US 6189405 B1 just introduced a kind of not only can regulate highly but also can regulate length as Figure 14 to Steering gear shown in Figure 16.Wherein, support A comprises fixed support 101 and movable supporting frame 102, and fixed support 101 is fixed on the desired location of automobile, and movable supporting frame 102 is supported by fixed support 101.Groove transposition section A1 is set at the two ends of support A, and the groove transposition section forms the adjustment part, position of bearing circle 105.Particularly, groove transposition section A1 is formed with vertical elongated slot 104 on being arranged on fixed support 101 by the axial elongated slot 103 that is arranged on the movable supporting frame 102, the mobile-bearing plate 102b of the back plate 101a of fixed support 101 and movable supporting frame 102 contacts, thereby the variation range that axial elongated slot 103 and horizontal elongated slot 104 intersect has determined groove transposition section A1.Two groove transposition section are axially being formed on the support A along steering shaft 100 respectively.Relative fixed support 101, along the vertically moving movable supporting frame 102 and just can make the Steering gear inclination of vertical elongated slot 104, promptly with regard to fixed support 101, steering shaft 100 has tilted.Relative fixed support 101, along horizontal elongated slot 103 vertically move movable supporting frame 102, can realize the flexible operation of Steering gear, promptly regulated the height of Steering gear.Yet, when the height of regulating this Steering gear or inclination angle, must be simultaneously the end that is connected Steering gear chaufeur one side, the position of universal-joint 113 on the steering shaft bottom end be adjusted, so, just must reserve certain installing space, so that the hinge-point of universal-joint can move.In addition, also can change because of rotating the inhomogeneous position, angle that causes.Its correction becomes difficult more in addition, or even can't realize.

The utility model content

The purpose of this utility model is, a kind of Steering gear of automobile is provided, and the shaft axis place of this Steering gear needn't be provided with rotating shaft or rotating assembly.

For achieving the above object, the utility model is taked following design plan:

A kind of Steering gear, comprise the leading portion steering shaft, sleeve pipe, the leading portion holding device, the back segment holding device, securing device, leading portion guide piece and back segment guide piece, wherein said leading portion steering shaft has front end that can antitorque ground closure dish and connects the rear end of a back segment steering shaft by a hinge axis, described sleeve pipe is nested with on described leading portion steering shaft, rotatably mounted described leading portion steering shaft, described securing device is used for relative leading portion holding device and the back segment holding device is fixed sleeve pipe or relief sleeve, described leading portion hold assembly takes the shape of the letter U, comprise diapire and two side, the two side connects the both sides of diapire respectively, and in this leading portion hold assembly, on the two side, form the leading portion slotted hole of circular arc, and on a sidewall, form contact surface at least; Described back segment hold assembly takes the shape of the letter U, and comprises diapire and two side, and the two side connects the both sides of diapire respectively, and in this back segment hold assembly, forms the back segment slotted hole of circular arc on the two side, and form contact surface at least on a sidewall; The center of arc of the center of arc of described leading portion slotted hole and back segment slotted hole is on same straight line, this straight line overlaps with the shaft axis of sleeve pipe, in the described contact surface, have at least the shaft axis of two relative contact surfaces and sleeve pipe to keep vertical relation, the stationkeeping of relative this leading portion hold assembly of described shaft axis or this back segment hold assembly; Relative fixed on all vertical with the shaft axis direction of described leading portion guide piece and back segment guide piece is provided with this leading portion guide piece movably in the leading portion slotted hole, this back segment guide piece is set in the back segment slotted hole movably.

Preferably, Steering gear of the present utility model also comprises at least one spring, this spring is positioned at two sweeps between snapholder by one and the coefficient snapholder of leading portion guide piece, one and the coefficient snapholder of sleeve pipe and one section and forms, zone at the sweep place, described spring links to each other with the back segment guide piece.

Preferably, also comprise at least one metal sheet, this metal sheet has an opening in order to the long hole shape of parts of equipped leading portion guide piece, and opening in order to the long hole shape of parts of equipped back segment guide piece, described metal sheet also has a shaft axis that keeps relative position to fix with holding device, so that leading portion guide piece and back segment guide piece are around shaft axis deflection.

Preferably, described leading portion guide piece comprises a fastening bolt that passes the leading portion slotted hole, and this fastening bolt is the part of anchor fitting.

Preferably, described back segment guide piece has the profile that is complementary with the back segment slotted hole.

Preferably, described contact surface is smooth face, and sleeve pipe is placed between the smooth described contact surface, and the plane of rotation keeping parallelism of the plane at these smooth contact surface places and sleeve pipe.

Preferably, described shaft axis intersects with the jointed shaft on the rear end of leading portion steering shaft.

The utility model has the advantages that: the slotted hole that circular arc is set on the sidewall of front and back hold assembly, and the center of arc of these slotted holes is positioned on the straight line, this straight line overlaps with the shaft axis of sleeve pipe, cover leading portion guide piece moves under the guiding of leading portion slotted hole, simultaneously, the back segment guide piece moves under the guiding of back segment slotted hole, and forward and backward guide piece is fixing on all directions vertical with shaft axis, promptly not can with adjustment component generation relative motion; So, shaft axis overlaps with the straight line at the arcuate midway point place of the slotted hole of forward and backward holding device, and keeps relative position to fix with hold assembly, also keeps relative position to fix in vehicle then, so just need not other extra parts that constitute rotating shafts, for example swivel bolt etc.; By this design, just can be with shaft axis design some small space parts on vehicle of adjustment component.

Description of drawings

The structural representation of Steering gear among a kind of embodiment of the present utility model shown in Fig. 1;

Fig. 2 is the lateral plan of Steering gear shown in Fig. 1, and the Steering gear among the figure is positioned at the top adjusting position;

Fig. 3 is the lateral plan of Steering gear shown in Fig. 1, and the Steering gear among the figure is positioned at the intermediate regulations position;

Fig. 4 is the lateral plan of Steering gear shown in Fig. 1, and the Steering gear among the figure is positioned at the bottom adjusting position;

The back segment hold assembly of the holding device of the utility model shown in Fig. 5;

The leading portion hold assembly of the holding device of the utility model shown in Fig. 6;

The one cover back segment guide piece of the utility model shown in Fig. 7;

Be labeled as the lateral plan of back segment guide piece of the view of A shown in Fig. 8 from Fig. 7;

Fig. 9 is the lateral plan of the forward and backward hold assembly of the utility model, and both relative positions are corresponding to the installation site of reality among the figure;

Figure 10 shows the corresponding site of Steering gear among a kind of embodiment of the utility model and each contact point of spring;

The Steering gear of another kind of embodiment of the present utility model has been shown among Figure 11;

Figure 12 is the lateral plan of Steering gear shown in Figure 11;

The scheme drawing that is used for the metal sheet of forced guiding shown in Figure 13 in the utility model;

Figure 14 to Figure 16 shows Steering gear of the prior art and guide frame thereof, and Figure 14 is a lateral plan, and Figure 15 is the partial enlarged view of hold assembly position among Figure 14, and Figure 16 is the cross section view of hold assembly position.

The specific embodiment

Below in conjunction with preferred embodiment the utility model is described in detail, should be noted that, in description described later, although employed term is to select from public term, but the part term then is the applicant to be judged by it and selects, and its detailed meanings should be understood according to the spirit that the utility model desire discloses.Described " preceding " is references object with " back " with bearing circle or chaufeur position, and therefore, described leading portion parts are nearer than the end of bearing circle one side of described back segment member distance Steering gear.

As shown in Figure 1, Steering gear 1 comprises leading portion steering shaft (or steering shaft) 5, adjustment component 2, holding device ( hold assembly 3,4 as hereinafter described), securing device (clamping bar 15 as hereinafter described, fastening bolt 11 etc.) and guide piece (fastening bolt 11 as hereinafter described is leading portion guide piece and back segment guide piece 12).

The steering handwheel that can connect a meaning not shown in the figures in the front side end (being the top) of leading portion steering shaft 5 antitorquely.Rear side end (i.e. bottom) at leading portion steering shaft 5 then is fixed with a Y-piece 33 that plays the hinge 16 of universal-joint function, and jointed shaft 8 passes Y-piece 33, and bonded assembly is a back segment steering shaft 34 on the hinge 16.Back segment steering shaft 34 in the present embodiment is non-telescoping, and this root back segment steering shaft 34 is also referred to as " turning to arm shaft " usually.Leading portion steering shaft 5 links to each other by the steering transmission linkage that does not illustrate among back segment steering shaft 34 and the figure.

Adjustment component 2 is that the center of circle provides swivel bearing around leading portion steering shaft 5 and for it with the axis 6 of leading portion steering shaft 5.Adjustment component 2 in embodiment illustrated in fig. 1 is sleeve pipes, and adjustment component 2 is fixed on the holding device.

Holding device is made up of cover leading portion (near chaufeur one a side) hold assembly 3 and cover back segment (away from a chaufeur) hold assembly 4.Two cover clamping parts 3,4 all are fixed on the automobile body of meaning not shown in the figures.

With reference to Fig. 5, hold assembly 4 can take the shape of the letter U, comprise diapire 19, two side 21,21 ' and two place's fixed parts 23,23 ', two side 21,21 ' is connected to the both sides of diapire 19, and two fixed parts 23,23 ' are connected to two side 21, a side 21 ', relative with diapire 19.Hold assembly 4 is fixed on the automobile body by two fixed parts 23,23 '.

With reference to Fig. 6, hold assembly 3 can take the shape of the letter U, comprise diapire 18, two side 20,20 ' and two place's fixed parts 22,22 ', two side 20,20 ' is connected to the both sides of diapire 18, and two fixed parts 22,22 ' are connected to two side 20, a side 20 ', relative with diapire 18.Hold assembly 3 is fixed on the automobile body by two fixed parts 22,22 '.

In the embodiment shown in fig. 1, hold assembly 3,4 all is a metal bending blanked part, and in other embodiment, hold assembly also can be a foundry goods, for example aluminium alloy castings or even Mg alloy castings.In addition, hold assembly 3,4 both can be made into integration, and also can be assembled by a plurality of parts.

When securing device unclamped, bearing circle can be with adjustment component 2 around shaft axis 7 deflections based on the height of hold assembly 3,4 in other words in order to regulate leading portion steering shaft 5.That is to say, take place at grade in fact at the adjusting of adjustment component 2, and behind the securing device locking, adjustment component 2 will no longer change with respect to the deflection angle of hold assembly 3,4.Shown in Fig. 2 to 4 is the Steering gear that is in the different adjustment position.Wherein, securing device is simplified, in addition, known figure for convenience, also omitted some parts of securing device.As can be seen, the position of shaft axis 7 (perpendicular to the paper direction) all can not change at different adjusting positions from Fig. 2 and Fig. 4.

To the embodiment shown in Figure 4, securing device is that a cover clamps mechanism at Fig. 2, and it comprises a fastening bolt 11 vertical with leading portion steering shaft 5.In addition, according to following description, this root fastening bolt 11 has also played the effect of leading portion guide piece simultaneously.A clamping bar 15 can be that rotate at the center with the axis at fastening bolt 11 places.Clamping bar 15 can trigger does not have the cam that shows among the figure, this cam then can with a terminal pad combined action that is mounted in equally on the fastening bolt 11.By the deflection of clamping bar 15, aforementioned terminal pad can be exerted pressure on the sidewall 20 ' of leading portion hold assembly 3, and a top, and the head of clamping bar 15 for example will be pushed up on the sidewall 20 of leading portion hold assembly 3 and clamped.So, under the mutual action of adjustment component 2 sidewalls, sidewall 20,20 ' can be compacted, makes adjustment component 2 be fixed then, promptly and the relative position of 3 of leading portion hold assemblies can not change again.

The leading portion slotted hole 9,9 ' that an arc is respectively arranged on the two side 20,20 ' of leading portion hold assembly 3.They are on the circular arc 13 that radius is R1.The fastening bolt 11 of the securing device vertical with regulating the plane can pass this two slotted holes 9,9 '.Under the released situation of securing device, fastening bolt 11 has also played the effect of leading portion guide piece, promptly guide adjustment component 2 based on leading portion hold assembly 3 along circular arc 13 relative motions.In addition, relative motions promptly at the rotational plane internal fixation, promptly can not take place with adjustment component 2 in fastening bolt 11 on all directions vertical with shaft axis 7.Correspondingly, it can pass a circular hole 35 on the adjustment component 2 joint close, referring to Figure 10.And on the direction parallel with shaft axis 7, relative motion then can take place in 2 of fastening bolt 11 and adjustment component, thereby realizes the locking and the release of securing device.

The back segment slotted hole 10,10 ' that an arc is respectively arranged on the sidewall 21,21 ' of back segment hold assembly 4.They are on the circular arc 14 that radius is R2.Back segment guide piece 12 is fixing by slotted hole 10,10 ', and can be along slotted hole 10, the 10 ' activity of these two circular arcs.Equally, back segment guide piece 12 is also fixed on all directions vertical with shaft axis 7, promptly can relative motions not take place with adjustment component 2.Correspondingly, a circular arc recess 36 is arranged on the back segment guide piece 12 of embodiment shown in Fig. 7 and Fig. 8, a part of cylindrical outer surface of it and adjustment component 2 mates mutually.Adjustment component 2 then is that the axis 6 with steering shaft 5 is that the center is wrapped in leading portion steering shaft 5.In addition, back segment guide piece 12 also comprises perpendicular to steering shaft 5 and passes the bolt of rear end plate of back segment guide piece.At slotted hole 10, on 10 ' the longitudinal extension direction, back segment guide piece 12 will be bent to circular arc, so that coupling slotted hole 10,10 ', referring to Fig. 8.So, just can guarantee that back segment guide piece 12 can be along slotted hole 10,10 ' track activity reaches the purpose of adjusting then.

Guide piece 12 can be with steel or sintered steel as material.Because frictional behaviour is more outstanding, therefore preferably adopt non-metals or plastics to make guide piece 12.On Fig. 9, accurately drawn slotted hole 9,9 ', slotted hole 10,10 '.Slotted hole 9,9 ', slotted hole 10,10 ' extends along circular arc 13,14, and correspondingly, and the contact of the line slotted hole of slotted hole 9,9 ' center of arc 10,10 ' center of arc then is located on the same line.This straight line then overlaps with shaft axis 7.Shaft axis 7 should be positioned at the scope at hinge 16 places and intersect with jointed shaft 8.

Move on the adjusting plane in order to ensure 2 meetings of adjustment component, have at least the sidewall 20,20 ', 21,21 ' of parts to should be smooth contact surface 25,25 ', 26,26 ' in the hold assembly 3,4.In an improvement of the present utility model, one or more in these several contact surfaces can also be elastic construction, guides adjustment component better under the situation that guarantees good contact.Correspondingly, can bend at metal and process punching 27 on the blanked part, thereby be separated out a part of smooth contact surface.Shown on Fig. 6 is exactly the sidewall 20 ' that has the Elastic Contact face 25 ' of punching 27.

Contact surface 25,25 ', 26,26 ' with vertical mutually by the straight line at the place, center of circular arc 13,14.Therefore, these contact surfaces also are orthogonal relation with shaft axis 7.

That is to say that the shaft axis 7 of the Steering gear that the utility model is related is changeless with respect to the position of holding device 3,4.When securing device was released, adjustment component 2 can be carried out limited deflection, so that regulate the height of Steering gear.And meanwhile, need not the parts (what form between adjustment component and the holding device is a kind of rolling bearing that does not have a part) of any formation rotating shaft in shaft axis 7 regions, that is to say that all constitute the parts of rotating shaft all away from shaft axis 7.So, holding device 3,4 just needn't extend to the position at shaft axis 7 places, and can keep certain axial distance with it.

At this, slotted hole 9,9 ', 10,10 ' to leave the spacing distance of Steering gear bearing circle one side end littler than the spacing distance that shaft axis 7 leaves Steering gear bearing circle one side end.

In order to make the motion of parts more smooth and easy,, a spring 17 has been installed on Steering gear particularly in order to avoid ultimate torque.In the embodiment shown in fig. 10, spring 17 acts on contact point 37 on the leading portion hold assembly 3 of holding device on the one hand, then acts on the other hand on the contact point 24 of adjustment component 2.Meanwhile, spring 17 also can guide the motion of back segment guide piece 12.During to adjusted, then spring 17 can apply the power F2 that one makes progress on back segment guide piece 12 in adjustment component 2.When adjustment component 2 was regulated downwards, then spring 17 can apply one downward power F2 ' on back segment guide piece 12.So, back segment guide piece 12 will be subjected to the power F2 consistent with sense of motion all the time, and F2 ' realizes moment balance then in the motion process of adjustment component 2, the stuck situation of adjustment component can not occur.Know figure for convenience, the point of action to power F2 and F2 ' among the figure does not carry out precise marking.The point of action of two bursts of power is located on the same line along circular arc 14.Particular location approximately is the centre at back segment guide piece 12.

In the embodiment shown in fig. 10, spring 17 comprises snapholder 38, snapholder 39 and is connected the sweep 40 of this two snapholder 38,39 respectively.Snapholder 38 acts on the contact point 37 of leading portion hold assembly 3.Snapholder 39 acts on the contact point 24 of adjustment component 2.Be fixed on the jut (not shown) of back segment guide piece 12 at the sweep 40 between two snapholders 38,39 in addition.If adjustment component 2 is done downward motion with respect to leading portion hold assembly 3, then spring 17 will be attempted to move downward at sweep 40, thereby apply power F2 ' on guide piece 12.Same, if adjustment component 2 is done motion upwards with respect to leading portion hold assembly 3, then spring 17 will be attempted upward movement at sweep 40, thereby apply power F2 on guide piece 12.

Spring 17 is tensioning in advance preferably, makes snapholder 39 apply one power towards the direction of snapholder 38, i.e. power F1 on Figure 10.So, when securing device was released, the weight of adjustment component 3 and leading portion steering shaft 5 just can be absorbed.Certainly, also can consider otherwise to set up spring or adopt many springs.

In addition, perhaps with situation that spring 17 cooperates under, can also be chosen in the control process, by a cover self contained system, realize the fixing of rotating shaft locus.Figure 11 and a solution that comes to this shown in Figure 12.Under the simplest situation, can adopt a metal sheet 28, two slotted holes 29 and 30 are arranged on it.Wherein, be inserted with an end of fastening bolt 11 in the slotted hole 29, parts of back segment guide piece 12 then be installed, i.e. an end of bolt in the slotted hole 30.In addition, on metal sheet 28, also have one and back segment hold assembly 4 bonded assembly fixed rotating shafts.In fairly simple structure, rotating shaft can be a circular bore 31 on the metal sheet.The peg 32 that links to each other with back segment hold assembly 4 just is inserted in this circular bore 31.Conversely, rotating shaft also can be a peg that is fixed on the metal sheet 28.This peg will be plugged in the circular bore of back segment hold assembly 4.When deflection has taken place with respect to hold assembly 3,4 in adjustment component 2, because therefore the mandatory guidance motion down of the slotted hole 29,30 of 2 cover guide piecees, 11,12 meetings on metal sheet 28 may guarantee that the locus of shaft axis 7 remains unchanged.

On Steering gear shown in Figure 11, can see the part of spring 17 at dorsal part.Then can see metal sheet 28 in a positive side.When regulating Steering gear, it can play the effect of balancing torque, makes the adjusting of Steering gear become more convenient then.In addition, it is also conceivable that in the both sides of Steering gear all to be equipped with a metal sheet and a spring, perhaps only respectively be equipped with a spring or a metal sheet in the both sides of Steering gear.

The related height-adjustable Steering gear of the utility model has wide range of applications.Except the application shown in the example, can also respective design go out the Steering gear of adjustable length.In this case, holding device 3,4 can be fixed on the another set of holding device.And this covering device can be regulated on the length direction of Steering gear with respect to vehicle body.Use for this class, preferably the back segment steering shaft is designed to stretch.

Though the utility model is described with reference to current specific embodiment, but those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, should understand and wherein can make variations and modifications and do not break away from the utility model in a broad sense, so be not that conduct is to qualification of the present utility model, for example, the U-shaped opening of leading portion hold assembly 3 or back segment hold assembly 4 also can be down.The related Steering gear of the utility model can also be selected the integral type elongated hold assembly that adopts aluminium alloy casting to form.Securing device also can be selected the different structure of description that goes out therewith.For example, realize locking, can also select the locking component that works by form fit for use except frictionally.This is adopted in present technology in a large number.Therefore, as long as in connotation scope of the present utility model, all will drop in the scope of the utility model claims variation, the modification of the above embodiment.

Claims (7)

1, a kind of Steering gear, comprise leading portion steering shaft (5), sleeve pipe (2), leading portion holding device (3), back segment holding device (4), securing device, leading portion guide piece (11) and back segment guide piece (12), wherein said leading portion steering shaft (5) has front end that can antitorque ground closure dish and connects the rear end of a back segment steering shaft by a hinge axis, described sleeve pipe (2) is nested with on described leading portion steering shaft (5), rotatably mounted described leading portion steering shaft (5), described securing device is used for relative leading portion holding device (3) and back segment holding device (4) is fixed sleeve pipe (2) or relief sleeve (2), it is characterized in that:

Described leading portion hold assembly (3) takes the shape of the letter U, comprise diapire (18) and two side (20,20 '), two side (20,20 ') connects the both sides of diapire (18) respectively, and in this leading portion hold assembly (3), on the two side, form the leading portion slotted hole (9 of circular arc, 9 '), and at least on a sidewall, form contact surface;

Described back segment hold assembly (4) takes the shape of the letter U, comprise diapire (19) and two side (21,21 '), two side (21,21 ') connect the both sides of diapire (19) respectively, and in this back segment hold assembly (4), on the two side, form the back segment slotted hole (10 of circular arc, 10 '), and at least on a sidewall, form contact surface;

The center of arc of the center of arc of described leading portion slotted hole and back segment slotted hole is on same straight line, this straight line overlaps with the shaft axis (7) of sleeve pipe (2), in the described contact surface, have at least the shaft axis (7) of two relative contact surfaces and sleeve pipe (2) to keep vertical relation, described shaft axis (7) is the stationkeeping of this leading portion hold assembly (3) or this back segment hold assembly (4) relatively;

Relative fixed on all vertical direction of described leading portion guide piece (11) and back segment guide piece (12) with shaft axis (7), at leading portion slotted hole (9, this leading portion guide piece (11) is set 9 ') movably, this back segment guide piece (12) is set in back segment slotted hole (10,10 ') movably.

2, Steering gear according to claim 1, it is characterized in that: also comprise at least one spring (17), this spring (17) is positioned at two snapholders (38 by one with the coefficient snapholder of leading portion guide piece (11) (38), one and the coefficient snapholder of sleeve pipe (2) (39) and one section, 39) sweep between (40) is formed, zone at sweep (40) place, described spring (17) links to each other with back segment guide piece (12).

3, Steering gear according to claim 1, it is characterized in that: also comprise at least one metal sheet (28), this metal sheet has an opening (29) in order to the long hole shape of parts of equipped leading portion guide piece (11), and opening (30) in order to the long hole shape of parts of equipped back segment guide piece (12), described metal sheet (28) also has one and holding device (3,4) keep the fixing shaft axis of relative position, so that leading portion guide piece and back segment guide piece (11,12) are around shaft axis (7) deflection.

4, Steering gear according to claim 1 is characterized in that: described leading portion guide piece (11) comprises that is passed the leading portion slotted hole fastening bolt of (9,9 '), and this fastening bolt is the part of anchor fitting.

5, Steering gear according to claim 1 is characterized in that: described back segment guide piece (12) has the profile that is complementary with back segment slotted hole (10,10 ').

6, Steering gear according to claim 1, it is characterized in that: described contact surface is smooth face, and sleeve pipe (2) is placed in smooth described contact surface (25,25 ', 26,26 ') between, and these smooth contact surfaces (25,25 ', 26,26 ') plane at place again with the plane of rotation keeping parallelism of sleeve pipe (2).

7, Steering gear according to claim 1 is characterized in that: described shaft axis (7) intersects with the jointed shaft on the rear end of leading portion steering shaft (5) (8).

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