DE102020103908A1 - Steering device - Google Patents

Abstract

A steering device (14) for a vehicle comprises a servomotor (24), a housing (32) and a toothed belt drive (26) driven by the servomotor (24), which is coupled on the output side to a wheel of the vehicle to be steered. The toothed belt drive (26) has a drive shaft (68), an output shaft (70) and two parallel toothed belts (52), the drive shaft (68) and the output shaft (70) being accommodated in the housing (32) and supported by the toothed belt ( 52) are coupled to one another. A partition (34) is provided on the housing (32), which extends between the toothed belts (52) and divides the housing (32) into two chambers, each chamber receiving one of the toothed belts (52).

Description

The invention relates to a steering device for a vehicle which has a servomotor, a housing and a toothed belt drive driven by the servomotor. The toothed belt drive is coupled on the output side to a wheel of the vehicle to be steered and has a drive shaft, an output shaft and two parallel toothed belts, the drive shaft and the output shaft being accommodated in the housing and being coupled to one another by the toothed belt.

An intermediate element, which is connected to tie rods of the wheels of the vehicle, is usually moved linearly by means of the output shaft, so that the vehicle is steered by the movement of the intermediate element. In the case of the generic steering devices, the two toothed belts are redundant components, so that one toothed belt is sufficient to couple the movement of the drive shaft and the output shaft.

If one of the toothed belts breaks, there is therefore another one that couples the drive shaft and the output shaft to one another, so that it is still possible to steer the vehicle with a broken toothed belt. However, it can happen with the generic steering devices that a torn toothed belt interferes with the movement of the intact toothed belt.

It is therefore the object of the invention to improve the generic steering device.

This object is achieved by a generic steering device, a partition being provided on the housing, which extends between the toothed belts and divides the housing into two chambers. Each of the chambers takes on one of the toothed belts.

The basic idea of the invention is to spatially separate the toothed belts from one another. The partition wall is provided for this purpose, which prevents a torn toothed belt from interfering with the movement of the still intact toothed belt. In this way, the steering devices known from the prior art are improved.

One aspect of the invention provides that the partition wall adjoins the housing and the drive and output shafts so closely that each toothed belt is already prevented from moving into the adjacent chamber. This ensures a certain minimum distance between the torn toothed belt and the still intact toothed belt, and contacting the toothed belt is ruled out.

For example, the partition wall is at a distance from the housing in a direction perpendicular to the axis of rotation of the servomotor which is less than the thickness of the toothed belt.

In other words, a gap is provided between the partition and the housing, which gap is smaller than the thickness of the toothed belt.

Alternatively, no gap is provided at all; H. In one embodiment of the invention, the external dimensions of the partition essentially correspond to the internal dimensions of the housing in the region of the partition.

The partition can be designed as a plate. The partition is therefore space-saving and inexpensive to manufacture.

For example, the partition is made of metal or plastic.

In one embodiment of the invention, an axial extension is provided in the interior of the housing, the partition being attached to the axial extension. The partition can therefore be easily attached within the housing, without intermediate parts, which makes the bracket stable.

In order to fasten the partition in the vicinity of its center of mass, the axial extension can be provided between the drive shaft and the output shaft. In this way, it is sufficient to fasten the partition wall only at one or a few fastening points on the housing.

It is conceivable that a one-piece drive pinion is provided on the drive shaft and / or a one-piece output pinion is provided on the output shaft, the toothed belts acting jointly on the drive pinion and jointly on the output pinion. This enables the drive pinion and / or the output pinion to be exchanged easily.

As an alternative to this, the drive shaft can merge in one piece into the drive pinion and / or the output shaft can merge in one piece into the output pinion, the toothed belts acting jointly on the drive pinion and jointly on the output pinion. In this way, an efficient transmission of the torque from the drive shaft to the output shaft is made possible.

In one embodiment of the invention, the partition has two openings, the drive pinion and the output pinion each extending through a corresponding opening in the partition in order to divide the drive pinion and the output pinion each into two sections. So there is no additional projection on the drive pinion or Necessary on the output pinion to prevent the toothed belts from rubbing against each other. In this way, the rotating mass of the toothed belt drive is reduced.

The drive pinion can have a radially protruding collar at an axial end opposite the output pinion as a stop for the associated toothed belt and the output pinion can also have a radially protruding collar at its axial end opposite the drive pinion as a stop for the associated toothed belt.

In other words, a collar is provided as a stop for each of the toothed belts and is provided on the drive pinion or the output pinion. This ensures that the toothed belt cannot slip from the drive pinion or the output pinion.

The drive pinion and the output pinion can have helical gears. The helical gears improve the smoothness of the toothed belt drive and reduce the running noise of the toothed belts.

It is conceivable that the drive pinion and the output pinion each have two axial areas that have toothings with mutually different pitches. In this way, the axial forces exerted by the two toothed belts, which act on the drive shaft and the output shaft, can be adjusted, in particular compensated.

For example, the gradients of the corresponding area are adapted to the width of the associated toothed belt.

It is conceivable that the toothed belts have predetermined, different long-term strengths, so that the weaker of the two toothed belts breaks before the other toothed belt. In this way, it is largely avoided that both toothed belts tear at the same time.

For example, the weaker toothed belt has a lower maximum load capacity.

Alternatively or additionally, the weaker toothed belt can also be made of a weaker material. For example, the tension cord of the weaker toothed belt is made of a fabric that has a lower thread density and / or a lower mass per unit area than the tension cord of the stronger toothed belt.

In general, the weaker toothed belt can also have a smaller cross section than the stronger toothed belt.

For example, the weaker toothed belt has a cross section that is at least 10% smaller than the thicker toothed belt.

The weaker toothed belt can also have a width that is at least 10% smaller than the thicker toothed belt.

In order to protect the stronger toothed belt under load and to transfer the torque of the drive shaft proportionally more through the weaker toothed belt, the stronger of the two toothed belts can be circumferentially longer than the weaker one.

For example, the lengths of the two toothed belts are chosen so that the stronger toothed belt transmits 40% of the torque and the weaker toothed belt 60%.

Both toothed belts have a load-bearing capacity that is sufficient to transmit the maximum torque of the servomotor. This means that one of the two toothed belts alone can transmit the torque if the other breaks.

In one embodiment of the invention, the drive pinion and the output pinion each have toothings with opposite pitches.

In order to dampen vibrations and oscillations of the partition wall and to keep it in a stable position, a shoulder can be provided on the inside of the housing. The partition wall rests axially against the shoulder.

In one embodiment of the invention, the steering device has a gear driven by the output shaft, in particular a helical gear. This enables the rotational movement of the output shaft to be converted into a linear movement of the intermediate element connected to the wheels.

For example, the helical gear is a recirculating ball steering gear.

In order to detect the tearing of one of the toothed belts without additional sensors, the steering device can also have a control device which is electronically connected to the servomotor and controls the servomotor, the control device being designed to measure the increase in the power consumption of the servomotor Detect tearing of a toothed belt. The power consumption increases due to the friction between the broken timing belt and the housing it encounters.

The steering device can be a “steering-by-wire” steering device.

For example, the servomotor is electronically coupled to the control device for this purpose, which in turn is sensor-coupled to a steering sensor that detects the position of a steering wheel to be moved by the occupant and processes it into a control signal for the servomotor.

In general, a tensioning device can be arranged in the housing, which changes the tension of at least one of the toothed belts during operation of the steering device. In this way it is possible to compensate for the age-related expansion of at least one of the toothed belts.

For example, the tensioning device is electronically connected to the control unit, which sets the tension of at least one of the toothed belts.

• - 1 eine schematische Draufsicht eines Fahrzeugs mit einer erfindungsgemäßen Lenkvorrichtung,
• - 2 eine perspektivische Explosionsansicht der erfindungsgemäßen Lenkvorrichtung aus 1,
• - 3 eine perspektivische Ansicht eines Antriebsritzels aus 2,
• - 4 ein Abtriebsritzel der erfindungsgemäßen Lenkvorrichtung aus 2 in einer perspektivischen Ansicht,
• - 5 eine perspektivische Ansicht der teilweise zusammengesetzten Lenkvorrichtung aus 2,
• - 6 eine Längsschnittansicht durch die zusammengesetzte Lenkvorrichtung aus 2,
• - 7 ein Detail A der 6,
• - 8 eine Querschnittansicht durch eine weitere Ausgestaltung der erfindungsgemäßen Lenkvorrichtung,
• - 9 eine schematische Draufsicht eines Fahrzeugs mit einer erfindungsgemäßen Lenkvorrichtung in einer weiteren Ausgestaltung,
• - 10 eine Draufsicht eines Abtriebsritzels in einer weiteren Ausgestaltung, und
• - 11 eine weitere Ausgestaltung eines Antriebsritzels in einer Draufsicht.

Further features and advantages of the invention emerge from the following description and from the accompanying drawings, to which reference is made below. In the drawings show:

• - 1 a schematic top view of a vehicle with a steering device according to the invention,
• - 2 a perspective exploded view of the steering device according to the invention 1 ,
• - 3 a perspective view of a drive pinion from 2 ,
• - 4th an output pinion of the steering device according to the invention 2 in a perspective view,
• - 5 a perspective view of the partially assembled steering device 2 ,
• - 6th a longitudinal sectional view through the assembled steering device 2 ,
• - 7th a detail A of 6th ,
• - 8th a cross-sectional view through a further embodiment of the steering device according to the invention,
• - 9 a schematic top view of a vehicle with a steering device according to the invention in a further embodiment,
• - 10 a plan view of an output pinion in a further embodiment, and
• - 11 a further embodiment of a drive pinion in a plan view.

1 Figure 11 shows a schematic top view of part of a vehicle 10 . The vehicle 10 has a steering wheel 12th , a steering device 14th and wheels 16 on.

The steering wheel 12th is about a handlebar 18th with a steering sensor 20th connected and the steering sensor 20th detects the absolute turning angle of the steering wheel with a temporal resolution 12th .

The steering sensor 20th thus represents the absolute angle of rotation of the steering wheel 12th and the turning speed of the steering wheel 12th as a steering signal L. ready and hands over the steering signal L. to a control unit 22nd the steering device 14th . In 1 is the transfer of the steering signal L. represented by an arrow.

The steering device 14th instructs the control unit 22nd , a servomotor 24 , a toothed belt drive 26th and an intermediate element 28 on that with the wheels 16 is coupled.

The control unit 22nd is electronic with the steering sensor 20th connected, for example via appropriate cables, and designed to be used by the steering sensor 20th provided steering signal L. to get and the servomotor 24 based on the steering signal L. head for.

In other words, the control unit continues 22nd the steering signal L. in corresponding control signals for the servomotor 24 around.

For example, the control unit determines 22nd based on the steering signal L. a current value for the servomotor 24 and places this current value on the servomotor over a certain time interval 24 at.

The servomotor 24 drifts, as in 2 shown, the toothed belt drive 26th that the movement of the servomotor 24 into a linear movement of the intermediate element 28 implements. By means of the intermediate element 28 become the wheels 16 of the vehicle 10 each around a pivot axis 30th swiveled and thus the vehicle 10 steered.

The steering device 14th thus converts an electronic steering signal L. into a mechanical steering movement of the vehicle 10 around. The steering device 14th is consequently a “steer-by-wire” steering device 14th .

Based on 2 until 8th becomes the exact structure and functioning of the steering device 14th explained in detail. The 2 the Steering device 14th in an exploded perspective view. The steering device 14th additionally has a toothed belt drive 26th receiving housing 32 , an the intermediate element 28 driving helical gear 33 and a partition 34 on.

The servomotor 24 is in the embodiment of 2 an electronic rotary motor that has an output shaft 36 Has. The servomotor 24 converts electrical power into a rotary motion of the output shaft 36 around an axis of rotation 38 around.

The servomotor 24 is on the outside of the housing 32 by means of screws 40 attached and the output shaft 36 of the servomotor 24 protrudes at least partially into the housing 32 into it.

The case 32 has two housing parts 42 on the respective mounting holes 44 to have. For the sake of clarity, the 2 only two of the mounting holes 44 provided with a corresponding reference number.

The mounting holes 44 are aligned concentrically to each other and the housing parts 42 are about screws 40 (see right side of the 2 ) attached to each other.

The housing parts 42 thereby form a cavity 46 (please refer 6th ) and on one of the housing parts 42 is an extension 48 integrally formed, which is located within the cavity 46 in a direction parallel to the axis of rotation 38 the output shaft 36 of the servomotor 24 extends. The appendix 48 is therefore an axial extension 48 .

As in 2 shown is the toothed belt drive 26th inside the case 32 arranged, so in the cavity 46 of the housing 32 , and has a drive pinion 50 , two parallel toothed belts 52 and an output pinion 54 on.

the 3 and 4th show the drive pinion 50 ( 3 ) and the output pinion 54 ( 4th ) in a perspective front view. Here are the drive pinions 50 and the output pinion 54 each with a corresponding central axis 60 shown, which is the axis of rotation of the drive pinion 50 or the output pinion 54 represents.

Both the drive pinion 50 as well as the output pinion 54 are formed in one piece and have external teeth 56 as well as a covenant 58 on who is the drive pinion 50 or the output pinion 54 closes on one side. In relation to the axis of rotation 38 of the servomotor 24 stands the covenant 58 radially in front, ie the drive pinion 50 and the output pinion 54 have in the area of the federal government 58 a larger outer dimension than in the area of the toothing 56 .

Here are the federal government 58 of the drive pinion 50 and the covenant 58 of the output pinion 54 arranged on opposite axial sides when installed.

The drive pinion 50 and the output pinion 54 have a helical toothing, ie the toothing 56 of the drive pinion 50 or the output pinion 54 is not parallel to the central axis 60 formed, but has an angle with respect to the central axis in plan view 60 on. Here is the angle of the toothing 56 of the drive pinion 50 to the central axis 60 equal to the angle of the toothing 56 of the output pinion 54 opposite the central axis 60 .

As in 4th shown is the output pinion 54 hollow and has a receiving space 62 on.

The recording room 62 is designed in such a way that the output pinion 54 the helical gear 33 ( 2 ) encloses at a distance. The internal dimensions of the receiving space are accordingly 62 larger than the external dimensions of the helical gear 33 . With screws 40 is the output pinion 54 with the helical gear 33 non-rotatably connected.

The drive pinion 50 sits non-rotatably on the output shaft 36 of the servomotor 24 .

As in 2 shown, have the timing belt 52 a width B and B '. The width B 'of the in 2 the toothed belt shown on the right 52 (hereinafter referred to as a weaker toothed belt 52 is about 50% smaller than the width B of the in 2 the toothed belt shown on the left 52 (hereinafter referred to as a stronger toothed belt 52 designated).

Consequently, the cross-section of the weaker toothed belt is also 52 50% smaller than the cross-section of the stronger toothed belt 52 and the weaker timing belt 52 has a lower long-term strength than the stronger toothed belt 52 .

In other words, it is specified that the weaker toothed belt 52 first rips. Here are the timing belts 52 designed so that each toothed belt 52 the maximum torque of the servomotor 24 can transfer.

The timing belt 52 are on opposite sides of the partition 34 arranged. The partition 34 has a fastening opening 64 and two more openings 66 .

The openings 66 are based on the external dimensions of the drive pinion 50 or the output pinion 54 customized. More precisely, they correspond Internal dimensions of the openings 66 essentially the outer dimensions of the drive pinion 50 or the output pinion 54 in the area of the federal government 58 .

As in 2 shown is the partition 34 via the fastening opening 64 and a screw 40 on the axial extension 48 of the housing 32 attached.

The axial extension extends 48 between the drive pinion 50 and the output pinion 54 .

The partition 34 is plate-shaped, ie the extent is perpendicular to the axis of rotation 38 is at least 10 times larger than the extension in the direction parallel to the axis of rotation 38 .

5 shows the assembled steering device 14th in a perspective front view. Here is the steering device 14th without the in 2 Shell-shaped housing part shown on the right-hand side 42 shown. Furthermore, in 5 just two of the screws 40 provided with corresponding reference numerals.

The timing belt 52 are on the same drive pinion 50 and the same output pinion 54 arranged and axially through the partition 34 separated from each other.

In other words, the partition extends 34 between the two toothed belts 52 .

Both the drive pinion protrude 50 as well as the output pinion 54 through the corresponding opening 66 in the partition 34 through.

In 7th can be seen that the partition 34 the drive pinion 50 in two sections 86 divided. One of the toothed belts is in each case 52 in one of the sections 86 arranged. The same also applies to the output pinion 54 ( 6th ).

6th shows that the partition 34 the cavity 46 of the housing 32 in a first chamber 76 and a second chamber 78 divided. In the first chamber 76 is the stronger timing belt 52 arranged and in the second chamber 78 the weaker toothed belt 52 .

The timing belt 52 couple the drive pinion 50 and the output pinion 54 . In other words, the timing belts transmit 52 that from the servomotor 24 torque provided by the drive pinion 50 on the output pinion 54 and the output pinion 54 then in turn drives the helical gear 33 at. The output shaft 36 is consequently a drive shaft 68 of the toothed belt drive 26th and the helical gear 33 an output shaft 70 of the toothed belt drive 26th .

In the design of the 2 and 5 is the helical gear 33 a ball screw (also known as a recirculating ball steering gear) and the intermediate element 28 a spindle 72 caused by a rotation of the helical gear 33 is moved linearly.

6th shows the assembled steering device 14th the 2 in a longitudinal section along the drive shaft 68 and the output shaft 70 of the toothed belt drive 26th .

The right part of the housing 42 according to 6th a warehouse 74 for the spindle 72 on and the other housing part a bearing 74 for the helical gear 33 .

In the second chamber 78 are two paragraphs 80 on the corresponding housing part 42 provided that in the cavity 46 perpendicular to the axis of rotation 38 protrude.

One of the paragraphs 80 is also in 7th shown showing the detail A of the 6th shows. Paragraph 80 is axially adjacent to the partition 34 arranged so that the paragraph 80 an axial abutment for the partition 34 form.

The paragraph protrudes 80 in the radial direction over a greater distance into the cavity 46 in as the radial distance T the partition 34 to the housing 32 amounts to.

The distance T the partition 34 to the housing 32 is also greater than the thickness D. the timing belt 52 .

The fat D. the timing belt 52 is made up of the thickness of the tensile cord 82 the timing belt 52 and the thickness of the teeth 84 the timing belt 52 together. In 7th is one tooth of the toothed belt 52 shown in dashed lines as the teeth 84 in the sectional view of the 7th are not visible.

In other words, the timing belts fit 52 not through the gap between the partition 34 and housing 32 so that a broken toothed belt 52 always in the appropriate chamber 76 , 78 stays and not in the other chamber 78 , 76 can get there with the still intact timing belt 52 caught.

8th shows a further embodiment of the steering device 14th in a cross section through the second chamber 78 . The further refinement essentially corresponds to the first refinement, so that only the differences are referred to below is received. Identical and functionally identical components are provided with the same reference symbols.

It can be seen that one outer dimension 88 the partition 34 essentially the internal dimensions of the housing 32 in the area of the partition 34 is equivalent to.

In other words is the distance T the partition 34 to the housing very little, for example less than 3 mm.

The output pinion 54 has a distance S to the housing 32 . The distance S is chosen large enough so that a torn toothed belt 52 does not result in the output gear being blocked 54 , i.e. the toothed belt drive 26th can lead, and chosen small enough that a torn timing belt 52 leads to increased friction, for example on the output pinion 54 .

In other words, a broken toothed belt makes contact 52 the output pinion 54 so that the servomotor 24 must exert a greater torque to the spindle 72 to move.

Due to the lower long-term strength, it is specified that the weaker toothed belt 52 , so the timing belt 52 in the second chamber 78 , first rips.

Through the partition 34 can the housing 32 thus be made very compact in the axial direction, since there is not a certain minimum distance between the toothed belt 52 must be observed in order to avoid entanglement of one of the toothed belts 52 to prevent in the other. In this way, the steering devices known from the prior art are improved.

The control unit 22nd is then designed, for example, to prevent the tearing of one of the toothed belts 52 to recognize. More precisely, the control unit measures 22nd the power consumption of the servomotor 24 and compares the current power consumption with a reference value for the current speed of rotation of the intermediate element 28 , the speed of rotation of the drive shaft 68 and / or the rotational speed of the output shaft 70 .

For example, one is electronic with the control unit 22nd connected sensor is provided, which determines the current speed of rotation of the intermediate element 28 , the drive shaft 68 and / or the output shaft 70 measures.

In the design of the 6th until 8th are two paragraphs 80 intended. In general it is also conceivable that only one paragraph 80 is provided or that a circumferentially closed paragraph 80 is provided.

In 9 a second embodiment of the invention is shown, which essentially corresponds to the first embodiment, so that only the differences will be discussed below. Identical and functionally identical components are provided with the same reference symbols.

In contrast to the design of the 1 is the steering device 14th not as a "steer-by-wire" steering device 14th designed, but as a power steering device 14th .

The handlebar has accordingly 18th at one end that is the steering wheel 12th opposite is a steering gear 90 on that a turning movement of the steering wheel 12th into a linear movement of the intermediate element 28 implements. The steering wheel 12th is therefore mechanical with the intermediate element 28 coupled.

The steering device 14th then supports the steering of the vehicle 10 depending on the steering signal provided L. .

10 and 11 show a further embodiment of the drive pinion 50 ( 10 ) and the output pinion 54 ( 11 ), which is essentially the design of the 3 and 4th so that only the differences are discussed below.

In contrast to the design of the 3 and 4th assign the drive pinion 50 and the output pinion 54 in the 10 and 11 each areas 92 with different toothings 56 on.

More precisely, it is the angle of the toothing 56 to the central axis 60 , i.e. the pitch of the toothing 56 , in the two areas 92 different from each other.

In the design of the 10 and 11 is the slope in the two areas 92 opposite.

In the embodiments of the 1 until 11 are the drive pinion 50 and the output pinion 54 separate from the drive shaft 68 or output shaft 70 educated. However, it is also possible that the drive pinion 54 integral with the drive shaft 68 and / or that the output pinion 70 integral with the output shaft 70 is trained.

Furthermore, one of the toothed belts 52 be circumferentially longer. For example, the stronger toothed belt is 52 circumferentially longer, so that the torque of the servomotor 24 mainly due to the weaker toothed belt 52 is transmitted.

Claims (15)

Steering device for a vehicle, with a servomotor (24), a housing (32) and a toothed belt drive (26) driven by the servomotor (24), which is coupled on the output side to a wheel (16) of the vehicle (10) to be steered and the one Drive shaft (68), an output shaft (70) and two parallel toothed belts (52), the drive shaft (68) and the output shaft (70) being accommodated in the housing (32) and being coupled to one another by the toothed belt (52), thereby characterized in that a partition (34) is provided on the housing (32) which extends between the toothed belts (52) and divides the housing (32) into two chambers (76, 78), each chamber (76, 78) having one the toothed belt (52) takes up. Steering device according to Claim 1 , characterized in that the partition (34) adjoins the housing (32) and the drive and output shafts (68, 70) so closely that each toothed belt (52) is subject to movement into the adjacent chamber (76, 78 ) is prevented, in particular wherein the partition (34) is at a distance (T) from the housing (32) in a direction perpendicular to the axis of rotation (38) of the servomotor (24) which is less than the thickness (D) of the toothed belt (52) ). Steering device according to Claim 1 , characterized in that the external dimensions (88) of the partition (34) essentially correspond to the internal dimensions of the housing (32) in the region of the partition (34). Steering device according to one of the preceding claims, characterized in that the partition (34) is designed as a plate. Steering device according to one of the preceding claims, characterized in that an axial extension (48) is provided in the interior of the housing (32), the partition wall (34) being attached to the axial extension (48). Steering device according to Claim 5 , characterized in that the axial extension (48) is provided between the drive shaft (68) and the output shaft (70). Steering device according to one of the preceding claims, characterized in that a one-piece drive pinion (50) is provided on the drive shaft (68) and a one-piece output pinion (54) is provided on the output shaft (70) and / or the drive shaft (68) is inserted into the drive pinion ( 50) and / or the output shaft (70) merge in one piece with the output pinion (54), the toothed belts (52) engaging together on the drive pinion (50) and jointly on the output pinion (54). Steering device according to Claim 7 , characterized in that the partition (34) has two openings (66), the drive pinion (50) and the output pinion (54) each extending through a corresponding opening (66) in the partition (34) in order to allow the drive pinion ( 50) and to divide the output pinion (54) into two sections (86). Steering device according to Claim 7 or 8th , characterized in that the drive pinion (50) at one axial end which is opposite to the output pinion (54) has a radially protruding collar (58) as a stop for the associated toothed belt (52) and the output pinion (54) at its Drive pinion (50) opposite axial end also has a radially protruding collar (58) as a stop for the associated toothed belt (52). Steering device according to one of the Claims 7 until 9 , characterized in that the drive pinion (50) and the output pinion (54) have helical teeth, in particular that the drive pinion (50) and the output pinion (54) each have two axial areas (92), the teeth (56) with mutually different pitches have, in particular toothings (56) with opposite pitches. Steering device according to one of the preceding claims, characterized in that a shoulder (80) is provided on the inside of the housing (32) and that the partition (34) rests axially on the shoulder (80). Steering device according to one of the preceding claims, characterized in that it has a gear, in particular a helical gear (33), driven by the output shaft (70). Steering device according to Claim 12 , characterized in that the helical gear (33) is a recirculating ball steering gear. Steering device according to one of the preceding claims, characterized in that it also has a control device (22) which is electronically connected to the servomotor (24) and controls the servomotor (24), the control device (22) being designed to be controlled by a Measure the increase in the power consumption of the servomotor (24) to detect the tearing of a toothed belt (52). Steering device according to one of the preceding claims, characterized in that the steering device (14) is a “steering-by-wire” steering device (14).

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