PatSeer

STEERING SYSTEM FOR A VEHICLE
Pub. No. IN201711017094A
App. No. IN201711017094
App. No. Original IN201711017094
Appl. Date 16-May-2017
Pub. Date 23-Nov-2018
Inventor(s) DR PARAS CHAWLA, DR RAJDEEP SINGH, MR NAVPREET SINGH
Assignee Norm. CHANDIGARH GROUP OF COLLEGES (LANDRAN KHARAR BANUR HIGHWAY SECTOR 112 LANDRAN SAHIBZADA AJIT SINGH NAGAR PUNJAB 140307 PUNJAB INDIA, IN)
Current Assignee CHANDIGARH GROUP OF COLLEGES (LANDRAN KHARAR BANUR HIGHWAY SECTOR 112 LANDRAN SAHIBZADA AJIT SINGH NAGAR PUNJAB 140307 PUNJAB INDIA, IN)
Current Owner CHANDIGARH GROUP OF COLLEGES
IPC B62D7/08
ABSTRACT
Disclosed is a steering system of a vehicle comprising a steering assembly including a steering rod, a steering wheel, and a rack and pinion gear arrangement, wherein said steering assembly coupled to a forward pair of wheels and arranged to receive an input from the steering wheel to rotate said forward pair of wheels, a steering control unit comprising a sensor operatively associated with at least one of said pair of wheels to determine speed of said vehicle over the ground and a controller in communication with said sensor, said controller is operable to compare determined speed of said vehicle with a predetermined threshold speed, and lock said steering wheel when said speed of vehicle exceeds said predetermined threshold speed.

CLAIMS

1. A steering system of a vehicle comprising : (a) a steering assembly including a steering rod, a steering wheel, and a rack and pinion gear arrangement, wherein said steering assembly coupled to a forward pair of wheels and arranged to receive an input from the steering wheel to rotate said forward pair of wheels; (b) a steering control unit comprising: (I) a sensor operatively associated with at least one of said pair of wheels to determine speed of said vehicle over the ground; and (II) a controller in communication with said sensor, said controller is operable to: (i) compare determined speed of said vehicle with a predetermined threshold speed, and (ii) lock said steering wheel when said speed of vehicle exceeds said predetermined threshold speed.

2. A steering system as claimed in claim 1, wherein said steering column rod is coupled with steering rod by a first universal joint.

3. A steering system as claimed in claim 1, further comprising at least one tie rod connected with said rack of said rack and pinion gear arrangement and at least one of said pair of wheels of said vehicle.

4. A steering system as claimed in claim 1, further comprising a second universal joint configured to couple with said pinion gear at one end via a rigid rod.

5. A steering system as claimed in claim 1, wherein said wheels are configured to turn 90 degrees with respect to said vehicle.

6. A steering system as claimed in claim 1, wherein said sensor is a speed sensor.

7. A steering system as claimed in claim 1, wherein said predetermined threshold speed is 25km/hr.

8. A steering system as claimed in claim 1, wherein said controller is operable to lock said steering wheel such that said wheels turns at maximum of 45 degree with respect to a vehicle. 10.

9. A steering system as claimed in claim 1, wherein said controller is further configured to remove said locking of said steering wheel when said vehicle speed is less than said predetermined threshold speed.


DESCRIPTION
FIELD OF THE INVENTION

The present disclosure relates to a steering mechanism for vehicles employing sharp turning radius, and more particularly to locking the steering wheel when the speed of vehicle exceeds a predetermined threshold speed.

BACKGROUND OF THE INVENTION

A zero-turn radius vehicle is one that is capable of turning about a vertical axis that passes through the centre point of the axis of the drive wheels. Some zero-turn radius vehicles use independently controlled drive wheels to achieve zero-turn radius capability. A variety of motor driven vehicle applications require that the vehicle be capable of negotiating sharp turns, such as a garden tractor or a riding lawnmower. Further, vehicle with zero turning radius capabilities helps in manoeuvring the vehicle in tight spaces such as parking lots and within small compounds.

Conventionally, to achieve zero turning radius, the wheels connected to the front axles are turned opposite to each other, and so are the wheels connected to the rear axle. The wheels on the on left half vehicle rotate in one direction and the ones on the right half of the vehicle rotate in the opposite direction. Particularly, the front wheels are generally rotated around 70-90 degrees. However, at high speeds, turning the front wheel at sharp angle might lead to vehicle instability and is thus unsuitable. Further, such instabilities may lead to accidents and unwarranted situation. Furthermore, when the vehicle is moving at a sharp turning radius, there is no provision for reducing or limiting the speed the vehicle moves around the turn, thus creating a risk of tipping the vehicle during a sharp turn.

Therefore, in light of the foregoing discussion, there exist problems associated with conventional earthing systems.

OBJECT OF THE INVENTION The principal object of the present invention is to provide stability to the vehicle, with sharp turning radius, during at high speed. Another object of the present invention is to provide steering system which offers

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minimum turning radius.

Another object of the invention is to provide sharp turning radius for a vehicle. The foregoing and other objects, features and advantages of the present invention will become readily apparent upon further review of the following detailed description of the preferred embodiment as illustrated in the accompanying drawings. SUMMARY OF THE INVENTION The present disclosure relates to an earthing electrode for electrical systems.

According to an embodiment of the present disclosure, there is provided A steering system of a vehicle comprising:

(a) a steering assembly including a steering rod, a steering wheel, and a rack and pinion gear arrangement, wherein said steering assembly coupled to a forward pair of wheels and arranged to receive an input from the steering wheel to rotate said forward pair of wheels;

(b) a steering control unit comprising:

(I) a sensor operatively associated with at least one of said forward pair of wheels to determine speed of said vehicle over the ground;

(II) a controller in communication with said sensor, said controller is operable to:

(i) compare determined speed of said vehicle with a predetermined threshold speed, and

(ii) lock said steering wheel when said speed of vehicle exceeds said predetermined threshold speed.

According to another embodiment of the present disclosure, wherein said steering column rod is coupled with steering rod by a first universal joint.

According to a further embodiment of the present invention, the steering system further comprising at least one tie rod connected with said rack of said rack and pinion gear arrangement and at least one of said pair of wheels of said vehicle.

According to an embodiment of the present invention, the steering system further comprises further comprising a second universal joint configured to couple with

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said pinion gear at one end via a rigid rod.

According to an embodiment of the present invention, wherein said wheels are configured to turn 90 degrees with respect to said vehicle.

According to a further embodiment of the present invention, wherein said sensor is a speed sensor.

According to an embodiment of the present invention, wherein said predetermined threshold speed is 25km/hr.

According to an embodiment of the present invention, wherein the controller is operable to lock the steering wheel such that said wheels turns at maximum of 45 degree with respect to a vehicle.

According to an embodiment of the present invention, wherein the controller is further configured to remove said locking of said steering wheel when said vehicle speed is less than said predetermined threshold speed.

Embodiments of the present disclosure substantially eliminate or at least partially address the aforementioned problems in the prior art, and provides a highly conductive, non-corrosive earthing electrode.

Additional aspects, advantages, features and objects of the present disclosure would be made apparent from the drawings and the detailed description of the illustrative embodiments construed in conjunction with the appended claims that follow.

It will be appreciated that features of the present disclosure are susceptible to being combined in various combinations without departing from the scope of the present disclosure as defined by the appended claims. BRIEF DESCRIPTION OF DRAWINGS

The summary above, as well as the following detailed description of illustrative embodiments, is better understood when read in conjunction with the appended drawings. For the purpose of illustrating the present disclosure, exemplary constructions of the disclosure are shown in the drawings. However, the present disclosure is not limited to specific instrumentalities disclosed herein. Moreover,

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those in the art will understand that the drawings are not to scale. Wherever possible, like elements have been indicated by identical numbers.

Embodiments of the present disclosure will now be described, by way of example only, with reference to the following diagrams wherein:

FIG.1 illustrates a schematic illustration of a steering system 01, in accordance with an embodiment of the present disclosure.

DETAILED DESCRIPTION

As required, detailed embodiments of the present disclosure are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the disclosure which may be embodied in various forms. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present disclosure in virtually any appropriately detailed structure.

Various other objects, advantages, and features of the disclosure will become more readily apparent to those skilled in the art from the following detailed description when read in conjunction with the accompanying drawings, in which like reference numerals designate like parts throughout the figures thereof.

In one aspect, an embodiment of the present disclosure provides a steering system of a vehicle comprising:

(a) a steering assembly including a steering rod, a steering wheel, and a rack and pinion arrangement, wherein said steering assembly coupled to a forward pair of wheels and arranged to receive an input from the steering wheel to rotate said forward pair of wheels; and

(b) a steering control unit comprising:

(I) a sensor operatively associated with at least one of said pair of wheels to determine speed of said vehicle over the ground;

(II) a controller in communication with said sensor, said controller is operable to:

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(i) compare determined speed of said vehicle with a predetermined threshold speed, and

(ii) lock said steering wheel when said speed of vehicle exceeds said predetermined threshold speed.

With reference to the drawings, specifically to FIG.1, illustrated is a schematic illustration of a steering system 01 of a vehicle, in accordance with an embodiment of the present disclosure. As shown, the steering system 01 of the vehicle comprises of a steering assembly 02. The steering assembly 02 includes a steering rod 04, a steering wheel 05, a rack 07 and a pinion gear 06 arrangements. Additionally, the steering system 01 may be operated by a single driver. In an embodiment, the vehicle may be any vehicle with 4 or more wheels. For example, the vehicle may be an automobile vehicle with 4 or more wheels. The steering assembly 02 is arranged in a rack and pinion steering mechanism. In an embodiment, the steering wheel 05 is of the standard size. For example, the size of the steering wheel 05 may be 12"of mean radius and the total length of rack 07 may be 102.2 mm & addendum length of pinion gear may be 29 mm. In other embodiments, the steering wheel 05 may be customized by the driver. Further, the steering assembly 02 is coupled to a front pair of wheels 08 of the vehicle. The front pair of the wheels 08 receives an input from the steering wheel 05 for rotation. The rotation of steering wheel 05 rotates the pinion gear 06, which in turn meshes with the rack 07 and thus the front pair of the wheel are rotated. For example, when steering wheel 05 is rotated clockwise, the vehicle tends to move to right side and vice versa for left turning of the vehicle. In an embodiment, the front pair of the wheels 08 is operable to turn 90 degrees with respect to the vehicle.

The steering system further includes a steering control unit 03. The steering control unit 03 further comprises of a sensor 09. The sensor 09 is operable a signal indicative of the speed of the vehicle over the ground. The sensor 09 thus determines the speed of the vehicle over the ground. In an embodiment, the sensor may be located on the vehicle. For example, the sensor 09 may be located at the steering column rod 11. In another embodiment, the sensor 09 may be located anywhere on the vehicle. In yet another embodiment, the sensor 09 may

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be located at a remote location, configured to determine the speed of the vehicle using Global positioning system (GPS). According to an embodiment, the sensor may be a speed sensor.

The steering control unit 03 further comprises of a controller 10. The controller 10 may be an electronic control unit. In an embodiment, the controller 10 is communicably coupled with the sensor 09. The controller may further include a memory unit to store a value of a predetermined threshold speed. In an embodiment, the predetermined threshold may be 25km/hr. In another embodiment, the user may input the predetermined threshold speed according to the road conditions through a user interface device present in the vehicle.

The controller 10 receives the determined speed of the vehicle from the sensor 09. The controller 10 further compares the determined speed of the vehicle with the predetermined threshold speed. If the determined speed of the vehicle exceeds the predetermined threshold speed, the controller 10 then locks the steering wheel 05.

In an embodiment, the controller 10 is operable to lock the steering wheel 05 such that said wheels turns at maximum of 45 degree with respect to a vehicle. For example, the predetermined threshold speed of the vehicle is 25 km/hr and the determined speed of the vehicle is 40 km/hr. In such cases, the controller 10 will lock the steering wheel 05 such that the front pair of the wheels 08 will be restricted to turn 45 degrees with respect to body of the vehicle. According to an embodiment, the controller 10 may be located at a remote location. In an alternate embodiment, the controller 10 may be located on the vehicle.

In another embodiment, the controller 10 may further be configured to remove the locking of the steering wheel 05 when the determined speed is less than said predetermined threshold speed. In such cases, the controller 10 allows the steering wheel 05 to turn the front pair of the wheel freely without any locking. For example, if the determined speed of the vehicle is less than the predetermined threshold speed the steering wheel 05 may not be restricted by the controller 10 and thus may be turned such that the front pair of the wheels 08 may be able to turn till 90 degrees with respect to body of the vehicle.

In an embodiment, the steering wheel 05 comprises of a steering column rod 11. In an embodiment, the steering column rod 11 extends from the steering wheel 05, wherein said steering column rod 11 is coupled with steering rod 04 by a first

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universal joint 12. In an embodiment, the steering column rod 11 consists of splines at an end for connection with first universal joint. The universal joint 12 transmits rotary power of the steering column rod 11 to the steering rod 04 at an angle. For example, the steering column rod 11 may be coupled with the steering rod 04 at a first end via the first universal joint 12. Additionally, the steering system 01 further comprises a second universal joint 15 configured to couple with the pinion gear 06 at one end via a rigid rod 13. The universal joint 15 transmits rotary power of the steering rod 04 to the pinion gear 06 at an angle

In another embodiment, the steering system 01 further comprises at least one tie rod 14 connected with the rack 07 and pinion gear 06 arrangement at one end and at least one of said pair of wheels of said vehicle. Additionally, the steering system 01 may include multiple tie rods 14, configured to couple with the rack 07 on one end and with the corresponding wheel of the front pair of wheels 08 of the vehicle. In an embodiment, the size of the tie rods 14 may be customized with linkage ball joint at both ends. In operation, the rotation of the pinion gear 06 tends to transverse to and fro motion to rack 07 which is connected to the tie rods 14 at both ends. Such connections with linkage ball joint at both end allows transmitting the angular motion to +30degree maximum +30degree transverse angular motion to customized tie rods 14. For example, when turning vehicle to left side, the customized tie rod 14 transmits the angular motion of +30 degree maximum of left linkage ball joint and 0 degree of angular rotation of right linkage ball joint and vice versa for turning vehicle to right side of the driver. Beneficially, such linkage ball joints allow the vehicle to turn to 90 degree of the front tires which can obtain zero turning radius of the vehicle.

While the disclosure has been presented with respect to certain specific embodiments, it will be appreciated that many modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the disclosure. It is intended, therefore, by the appended claims to cover all such modifications and changes as fall within the true spirit and scope of the disclosure.





















CLAIMS