EP3544850A1

EP3544850A1 - Bi-directional actuator

Info

Publication number: EP3544850A1
Application number: EP17822443.2A
Authority: EP
Inventors: Ravi Ranjan; Jainendra MISHRA; Shanmugasundram GOVINDASAMY; Vikram KOTHAMACHU
Original assignee: KPIT Technologies Ltd
Current assignee: KPIT Technologies Ltd
Priority date: 2016-11-26
Filing date: 2017-11-16
Publication date: 2019-10-02
Also published as: JP2020500765A; WO2018096426A1

Abstract

An actuation control device for controlling transmission of an actuation force to one or a plurality of actuation operated features, wherein the actuation control device includes:a plurality of bevel gears including: at least one input gear (406); at least one intermediate gear (408); and at least one output gear (410); at least one ring (412) operatively coupled to said at least one intermediate gear (408), and a plurality of locks (416 and 418); wherein selective engagement and/or disengagement of one, some or all of said plurality of locks allow for any or a combination of (a) no transmission of actuation force, (b) transmission of actuation force in same rotational direction and (c) transmission of actuation force in opposite rotational direction. The present disclosure also provides a vehicle seat positioning system incorporating advantageous actuation control device realized in accordance with implementations of the present disclosure.

Description

BI-DIRECTIONAL ACTUATOR

TECHNICAL FIELD

[0001] The present disclosure generally relates to the field of actuator systems. More particularly, the present disclosure relates to a system for operating one or a plurality of actuation operated features using output from a single actuator and an actuation control device therefor.

BACKGROUND

[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.

[0003] In various industrial applications, multiple motors are used to drive various elements. For example, separate motors and solenoids are used to actuate various electrically- driven and automatic features of an automobile. Use of multiple motors for different functions poses a number of difficulties. In an automobile, the use of multiple electromagnetic devices (actuators) increases the automotive vehicle weight and cost. Not only is the cost of manufacturing increased when a multiplicity of electromagnetic devices are used, but the assembly cost, part number proliferation and handling costs, electrical wiring costs, objectionable motor noise, and failure modes are also increased significantly. In addition, it is often difficult to place multiple devices within the small space available.

[0004] Document GB2153218A discloses an apparatus with a motor connected to the gears on coupling head, which is connected to multiple adjusting devices with the help of flexible shafts. Motion transfer from motor shaft to flexible shaft takes place through an intermediate gear which is meshed with a pinion mounted on the motor shaft. The intermediate shaft is further selectively coupled with various coupling toothed wheels by operating a locating lever. The motion to the coupling toothed wheel is further transferred to actuate various seat movements. Electrical contacts are provided for operating the electric motor, by means of which the electric motor rotates clockwise or anti-clockwise depending on the desired final output motion.

[0005] US patent number 6,126, 132 discloses a seat track actuator assembly comprising a motor, wherein the output shaft of motor is capable of imparting linear and rotational movements. A spur gear is attached to the output shaft of the motor, which can selectively engage with one of the bevel gears such that external spline on spur gear can mesh with the internal spline on bevel gear. Linear movement of output shaft of motor and an externally splined spur gear fixedly mounted thereon act as a clutching intermittent motion mechanism to selectively couple and uncouple electric motor, and the desired one of the three movement mechanisms through bevel gear train. However, there is no provision for independent direction control. Further, the device limits the application only to physically nearby outputs.

[0006] US patent number 5, 103,691discloses a device for motorized control of a set of elements such as adjustable parts of a vehicle seat, characterized in that it comprises: at least one motor equipped with an output shaft carrying two coaxial worms offset axially on the output shaft and with opposite pitches, these worms forming the input of the device, pairs of wheels meshing with the worms, mutually in pairs, an output shaft traversing each wheel freely and intended to control an associated element at one and/or the other of its opposite ends, on each shaft and facing each wheel, a clutch independent of the other clutches and adapted in order to be able to link the selected shaft in rotation to the corresponding wheel; the wheels, shafts and associated clutches together form a function divider. However, the solution is limited to four outputs from each actuator. Though it can be connected in series to get more outputs, it limits direct output from each motor. Further, there is no provision for independent direction control and failure in any one engagement will result in failure of complete system. Apart from these drawbacks, the proposed system is suffering from other drawbacks including the system being prone to vibration and noise owing to utilization of straight toothed gear, the system being able to be extended only lengthwise and hence, limits the packaging flexibility and the like.

[0007] There is, therefore, a need for a system and method(s)for controlled movement of multiple actuator systems for various applications that does not suffer from the drawbacks of the known art. Need is also felt to provide solution(s) to shortcomings of the known art such as packaging limitations, weight addition due to number of actuators and/or sensors, architectural and wiring complexities amongst others.

[0008] All publications herein are incorporated by reference to the same extent as if each individual publication or patent application were specifically and individually indicated to be incorporated by reference.

[0009] Where a definition or use of a term in an incorporated reference is inconsistent or contrary to the definition of that term provided herein, the definition of that term provided herein applies and the definition of that term in the reference does not apply. [0010] In some embodiments, the numbers expressing quantities of ingredients, properties such as concentration, reaction conditions, and so forth, used to describe and claim certain embodiments of the invention are to be understood as being modified in some instances by the term "about". Accordingly, in some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable. The numerical values presented in some embodiments of the invention may contain certain errors necessarily resulting from the standard deviation found in their respective testing measurements.

[0011] As used in the description herein and throughout the claims that follow, the meaning of "a," "an," and "the" includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of "in" includes "in" and "on" unless the context clearly dictates otherwise.

[0012] The recitation of ranges of values herein is merely intended to serve as a shorthand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each individual value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g. "such as") provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.

[0013] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all Markush groups used in the appended claims. OBJECTS OF THE INVENTION

[0014] An object of the present invention is to provide a system for operating one or a plurality of actuation operated features using output from a single actuator and to provide an actuation control device therefor.

[0015] Another object of the present invention is to provide a cost effective, easy to handle, light-weight and compact actuation system, which requires minimum maintenance.

[0016] Yet another object of the present invention is to replace multiple actuator system with a single actuator system, while offering the same attributes.

[0017] A further object of the present disclosure is to provide an actuator system with a flexible packaging in the vicinity or remotely alike.

[0018] It is also an object of the present invention to allow motion transfer to non- parallel and/or non-concurrent axis and thus offering limitless flexibility in packaging.

SUMMARY

[0019] The present disclosure generally relates to the field of actuator systems. More particularly, the present disclosure relates to a system for operating one or a plurality of actuation operated features using output from a single actuator and an actuation control device therefor.

[0020] An aspect of the present disclosure provides a system for operating one or a plurality of actuation operated features, the system comprising: an actuator; a geartrain configured to transmit an actuation force from the actuator to the one or a plurality of actuation operated features; and at least one actuation control device comprising a plurality of bevel gears, at least one ring operatively coupled to at least one bevel gear of the plurality of bevel gears, and a plurality of locks, wherein selective engagement and/or disengagement of one, some, or all of the plurality of locks effects any or a combination of (a) no transmission of the actuation force from the geartrain to the one or a plurality of actuation operated features, (b) transmission of the actuation force from the geartrain to the one or a plurality of actuation operated features in a rotational direction, same as that of a rotational direction in which the actuation force is input to the at least one actuation control device, and (c) transmission of the actuation force in a rotational direction, opposite to that of the rotational direction in which the actuation force is input to the at least one actuation control device. In an embodiment, locks comprise of, but not limited to, solenoid locks. In an embodiment, bevel gears include at least one input gear, at least one intermediate gear and at least one output gear. In an embodiment, the at least one ring is operatively coupled to the at least intermediate gear. In an embodiment, the system further includes at least one flexible shaft for transmission of the actuation force from the at least one actuation control device to the one or a plurality of actuation operated features. In an embodiment, the actuator includes at least one position sensing device configured to detect position of the one or a plurality of actuation operated features. In an embodiment, the system is capable of operating a plurality of actuation operated features by transmission of the actuation force from a single actuator.

[0021] The present disclosure provides an actuation control device for controlling transmission of an actuation force to one or a plurality of actuation operated features, the actuation control device comprising:a plurality of bevel gears, wherein the plurality of bevel gears includes at least one input gear operatively coupled to an input shaft, at least one intermediate gear, and at least one output gear operatively coupled to an output shaft; at least one ring operatively coupled to the at least one intermediate gear; and a plurality of locks, wherein selective engagement and/or disengagement of one, some, or all of the plurality of locks effects any or a combination of (a) no transmission of the actuation force from the input shaft to the output shaft, (b) transmission of the actuation force from the input shaft to the output shaft in a rotational direction, same as that of a rotational direction in which the actuation force is input to the input shaft, and (c) transmission of the actuation force from the input shaft to the output shaft in a rotational direction, opposite to that of the rotational direction in which the actuation force is input to the input shaft.

[0022] The selective engagement of a first lock of the said plurality of locks effects selective inhibition of motion of the at least one intermediate gear around its rotational axis, and wherein the selective engagement of a second lock of the said plurality of locks effects selective inhibition of motion of the at least one ring around its rotational axis. In an embodiment, the selective engagement of the first lock and the selective disengagement of the second lock effects the transmission of the actuation force from the input shaft to the output shaft in a rotational direction, same as that of a rotational direction in which the actuation force is input to the input shaft, and wherein the selective disengagement of the first lock and the selective engagement of the second lock effects the transmission of the actuation force from the input shaft to the output shaft in a rotational direction, opposite than that of the rotational direction in which the actuation force is input to the input shaft. In an embodiment, the selective disengagement of both the first lock and the second lock of the plurality of locks effects no transmission of the actuation force from the input shaft to the output shaft. In an embodiment, the actuation control device is configured to operate a plurality of actuation operated features by transmission of the actuation force from a single actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0024] FIG. 1 illustrates an exemplary block diagram depicting a conventional actuation system with dedicated actuator/motor for each function.

[0025] FIG. 2 illustrates an exemplary block diagram depicting a system with single actuator/motor catering toone or a plurality of actuation operated features, in accordance with implementations of the present disclosure.

[0026] FIG. 3 illustrates an exemplary view of a system for operating one or a plurality of actuation operated features, in accordance with an implementation of the present disclosure.

[0027] FIG. 4A through 4D illustrate exemplary views of the actuation control device for controlling transmission of an actuation force to one or a plurality of actuation operated features, in accordance with an implementation of the present disclosure.

[0028] FIG. 4E illustrates an exemplary exploded view depicting the actuation control device for operating one or a plurality of actuation operated features, in accordance with an implementation of the present disclosure.

[0029] FIG. 5 illustrates an exemplary view of the actuation control device depicting placement of various components thereof in accordance with an implementation.

[0030] FIG. 6A and 6B illustrate exemplary views depicting working of the actuation control device realized in accordance with an implementation.

[0031] FIG. 7A through 7D illustrate exemplary views of the lock in accordance with an implementation.

[0032] FIG. 7E illustrates an exemplary view depicting activation of the locking mechanism in accordance with an implementation.

[0033] FIG. 8A through 8D illustrate exemplary views of the lock that utilizes a ratchet and pawl mechanism for selective activation/engagement thereof in accordance with an implementation.

[0034] FIG. 8E illustrates an exemplary view depicting a cross-sectional view of a lid in association with an outside washer and a disc in accordance with an implementation. [0035] FIG. 9 illustrates an exemplary view depicting a conventional system that employs a plurality of actuators (or motors), each associated with corresponding sets of geartrains, to actuate the actuation operated features.

[0036] FIG. 10 illustrates an exemplary view depicting the system, as realized in accordance with the present disclosure, that employs actuation control devices to actuate one or a plurality of the vehicular seat positioning means using a single actuator (or motor).

[0037] FIG. 11 illustrates an exemplary exploded view of a system 300 for operating one or a plurality of actuation operated features in accordance with an implementation of the present disclosure.

[0038] FIG. 12A illustrates an exemplary view depicting vehicle seat positioning system in accordance with an implementation of the present disclosure.

[0039] FIG. 12B illustrates an exemplary view depicting a position sensing device configured as part of the actuator (motor) in accordance with an implementation of the present disclosure.

DETAILED DESCRIPTION

[0040] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.

[0041] Each of the appended claims defines a separate invention, which for infringement purposes is recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the "invention" may in some cases refer to certain specific embodiments only. In other cases it will be recognized that references to the "invention" will refer to subject matter recited in one or more, but not necessarily all, of the claims.

[0042] As used in the description herein and throughout the claims that follow, the meaning of "a," "an," and "the" includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of "in" includes "in" and "on" unless the context clearly dictates otherwise.

[0043] All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g. "such as") provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.

[0044] Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.

[0045] The present disclosure generally relates to the field of actuator systems. More particularly, the present disclosure relates to a system for operating one or a plurality of actuation operated features using output from a single actuator and an actuation control device therefor.

[0046] An aspect of the present disclosure provides a system for operating one or a plurality of actuation operated features, the system comprising: an actuator; a geartrain configured to transmit an actuation force from the actuator to the one or a plurality of actuation operated features; and at least one actuation control device comprising a plurality of bevel gears, at least one ring operatively coupled to at least one bevel gear of the plurality of bevel gears, and a plurality of locks, wherein selective engagement and/or disengagement of one, some, or all of the plurality of locks effects any or a combination of (a) no transmission of the actuation force from the geartrain to the one or a plurality of actuation operated features, (b) transmission of the actuation force from the geartrain to the one or a plurality of actuation operated features in a rotational direction, same as that of a rotational direction in which the actuation force is input to the at least one actuation control device, and (c) transmission of the actuation force in a rotational direction, opposite to that of the rotational direction in which the actuation force is input to the at least one actuation control device. In an embodiment, locks comprise of, but not limited to, solenoid locks. In an embodiment, bevel gears include at least one input gear, at least one intermediate gear and at least one output gear. In an embodiment, the at least one ring is operatively coupled to the at least intermediate gear. In an embodiment, the system further includes at least one flexible shaft for transmission of the actuation force from the at least one actuation control device to the one or a plurality of actuation operated features. In an embodiment, the actuator includes at least one position sensing device configured to detect position of the one or a plurality of actuation operated features. In an embodiment, the system is capable of operating a plurality of actuation operated features by transmission of the actuation force from a single actuator.

[0047] Another aspect of the present disclosure provides an actuation control device for controlling transmission of an actuation force to one or a plurality of actuation operated features, the actuation control device comprising: a plurality of bevel gears, wherein the plurality of bevel gears includes at least one input gear operatively coupled to an input shaft, at least one intermediate gear, and at least one output gear operatively coupled to an output shaft;at least one ring operatively coupled to the at least one intermediate gear; anda plurality of locks, wherein selective engagement and/or disengagement of one, some, or all of the plurality of locks effects any or a combination of (a) no transmission of the actuation force from the input shaft to the output shaft, (b) transmission of the actuation force from the input shaft to the output shaft in a rotational direction, same as that of a rotational direction in which the actuation force is input to the input shaft, and (c) transmission of the actuation force from the input shaft to the output shaft in a rotational direction, opposite to that of the rotational direction in which the actuation force is input to the input shaft.

[0048] The selective engagement of a first lock of the said plurality of locks effects selective inhibition of motion of the at least one intermediate gear around its rotational axis, and wherein the selective engagement of a second lock of the said plurality of locks effects selective inhibition of motion of the at least one ring around its rotational axis. In an embodiment, the selective engagement of the first lock and the selective disengagement of the second lock effects the transmission of the actuation force from the input shaft to the output shaft in a rotational direction, same as that of a rotational direction in which the actuation force is input to the input shaft, and wherein the selective disengagement of the first lock and the selective engagement of the second lock effects the transmission of the actuation force from the input shaft to the output shaft in a rotational direction, opposite than that of the rotational direction in which the actuation force is input to the input shaft. In an embodiment, the selective disengagement of both the first lock and the second lock of the plurality of locks effects no transmission of the actuation force from the input shaft to the output shaft. In an embodiment, the actuation control device is configured to operate a plurality of actuation operated features by transmission of the actuation force from a single actuator.

[0049] FIG. 1 illustrates an exemplary block diagram depicting a conventional actuation system with dedicated actuator/motor for each function. Notably, such a system requires utilization of multiple motors, denoted as 110, 120, 130 and 140, corresponding to each of the functions (denoted as Function- 1, Function-2, Function-3 and Function-4)they sub-serve, while making use of different worm gear boxes (denoted as 112, 122, 132 and 142). However, this leads to improper utilization of space giving rise to packaging issues, besides high maintenance costs associated therewith. As also illustrated in FIG. 1, one or more functions selected from Function- 1 to Function-4 can be elicited upon receipt of commands from the control switch(es) 102 to the ECU 104,which then operates one or more motors (denoted as 110, 120, 130 and 140) with the help of electrical power from the Electrical Power Input 106. As would be readily apparent, the presence of different motors leads to an inefficient operation leaving less scope for any customization of operation of such motors.

[0050] FIG. 2 illustrates an exemplary block diagram depicting a system with a single actuator/motor catering to one or a plurality of actuation operated features in accordance with implementations of the present disclosure. The system, realized in accordance with implementations of the present disclosure, can make use of multiple flexible shafts (denoted as 208-1, 208-2, 208-3 and 208-4) that can be connected to the actuation control device 204, obviating need of multiple motors as in case of conventional actuation systems. In an exemplary implementation, motor 210, on receiving Electric Power Input 206, can transmit the actuation force to the actuation control device 204, which can selectively transfer the actuation force, in accordance with command(s) received from the control switch(es) 202, to one or more flexible shafts connected therewith (denoted as 208-1,208-2,208-3 and208-4). Flexible shaft(s)can then operate one or a plurality of actuation operated features to elicit execution of desired function(s) (denoted as Function- 1 through Function-4) depending upon the state of corresponding worm gear box(es) (denoted as 212-1, 212-2, 212-3 and 212-4).

[0051] FIG. 3 illustrates an exemplary view of a system300 for operating one or a plurality of actuation operated features in accordance with an implementation of the present disclosure. As illustrated, the system 300 comprises of an actuator318 (e.g. motor), a gear train including a plurality of gears denoted as 302, 302a, 304a, 306a, 308a and 310a, and actuation control device(s) denoted as 304b, 306b, 308b and 310b. In an implementation, the motor 318 is connected to a gear 302 through a shaft. From the gear 302,the actuation force(motion) may be transferred to secondary gears (302a, 304a, 306a, 308a and 310a) and then to corresponding actuation control devices (304b, 306b, 308b and 310b). The actuation control devices can have respective output ends denoted as 304c, 306c, 308cand 310c that can be connected to flexible shafts or any other actuation force (motion) transmission means, as known or appreciated by a person reasonably skilled in the art, to operate one or a plurality of actuation operated features. As also illustrated, in an implementation, the flexible shaft 312 can include an adapter 314(while other flexible shafts and corresponding adapters are obvious and hence, not shown for the sake of simplicity). In an implementation, the system can be enclosed in a casing/housing.

[0052] In accordance with an implementation, the system comprises of a motor, which elicits the required actuation force to the gears (geartrain),thereby making actuation force available at all outputs (denoted as 304c, 306c, 308c and 310c) at all times when the motor is operated. The actuation control devices may be used to engage, change direction and/or disengage each output individually. In a preferred implementation, all actuation control devices remain normally in the disengaged position and upon receipt of the command, actuation control device(s) corresponding to the actuation operated feature(s)is activated to elicit actuation force in the required direction. For example, if function corresponding to the output 304c is called for, motor318 is powered to transmit actuation force and the actuation control device 304b is engaged so as to transmit the actuation force to said feature. Since, all the other actuation control devices are normally disengaged, no actuation force/motion is transferred to other features. However, any other alternative arrangement/operation can be configured, as known to or appreciated by a person skilled in the art, to serve its intended purpose as laid down in implementations of the present disclosure without departing from the scope and spirit of the present invention. In an implementation, the actuator (motor) includes at least one position sensing device configured to detect position of the one or a plurality of actuation operated features. In an implementation, the position sensing device detects the operating position/location of the one or a plurality of actuation operated features (e.g. if in response to the actuation force, actuation of the actuation operated feature is elicited or not and particularly, if desired functionality has been achieved or not). In an exemplary implementation, the position sensing device is a potentiometer configured as part of the actuator. However, the potentiometer can be conveniently configured as a separate device that can provide feedback to the actuator and/or the system if in response to the actuation force, the desired functional is performed or not. In an exemplary implementation, all movable joints are equipped with at least one potentiometer for feedback.

[0053] FIG. 4A through 4D illustrate exemplary views of the actuation control device 400 for controlling transmission of an actuation force to one or a plurality of actuation operated features in accordance with an implementation of the present disclosure. As illustrated, the actuation control device 400 includes a plurality of bevel gears, denoted as 406, 408, 410 and 420. In an implementation, gear 406 can act as an input gear, gear 408 can act as an intermediate gear and gear 410 can act as an output gear. In an implementation, gear 420 can act as a dummy gear and can confer support to other gears. In an implementation, the actuation control device 400 further includes a ring 412, operatively coupled to the intermediate gear 408, and a plurality of locks (denoted as 416 and 418), functions of which are described in detail herein below. In an implementation, locks are solenoid locks. However, utilization of any other types of locks as known or appreciated by a person skilled in the art, for example, mechanical locks, are completely within the scope of the present invention. In an implementation, actuation control device 400 further includes a central shaft 402 (which can act as an input shaft), such that one of the secondary gear (for example, 304a)can be connected thereto, for transmitting the actuation force. In an implementation, the shaft 404 can act as an output shaft.FIG. 4E illustrates exemplary exploded view of the actuation control device 400 for controlling transmission of an actuation force to one or a plurality of actuation operated features in accordance with an implementation of the present disclosure.

[0054] FIG. 5 illustrates an exemplary view of the actuation control device 400 depicting placement of various components thereof in accordance with an implementation. As illustrated, the ring 412 is coupled to the ring cover plate 430 (alternatively and synonymously referred to herein as casing) with help of a plurality of bearings 422 to enable the ring 412 to freely revolve around its central axis. Further, the ring cover plate 430 is provided with one or a plurality of slots or tracks, such that the bearings 422 can be detachably fitted there within, at least in part, so as to maintain a position whereby both the ring 412 and the ring cover plate 430 defines a common centre of axis.

[0055] FIG. 6A and 6B illustrate exemplary views depicting working of the actuation control device 400,as realized in accordance with an implementation. The actuation force transmitted by the geartrain from an actuator is firstly input to the input shaft 402, coupled to the input gear 406. When both locks 416 and 418 are in disengaged position, the ring 412 can rotate about its rotational axis (parallel to the rotational axis of the input shaft 402) and the intermediate gear 408 can rotate about its rotational axis (denoted as 414). This can result in two different movements of the intermediate gear 408, firstly, rotating about its own rotational axis 414 and secondly, rotating along the input gear 406, thereby precluding transfer of any actuation force/motion to the output gear 410, coupled to the output shaft 404, and hence, no motion (actuation force) is transmitted to the actuation operated feature.

[0056] As illustrated in FIG. 6A, when lock 416 is selectively brought in the engaged position while maintaining the lock 418 in disengaged position, it results in inhibition of the rotation of intermediate gear 408 on its rotational axis 414, while allowing the ring 412 to rotate along its rotational axis (i.e. intermediate gear 408 rotates along the input gear 406). This allows actuation control device 400 to transmit the actuation force (motion) in the same rotational direction in which the actuation force is input to the input shaft 402 (or input gear 406). In other words, the activation/engagement of lock 416 and non- activation/disengagement of lock 418 allows the actuation control device 400 to transmit the actuation force (motion) from the geartrain (302, 304a, 306a and 308a) to the actuation operated features (through flexible shaft or other actuation force transmission means) in the same rotational direction in which the actuation force is input to the actuation control device 400.

[0057] As illustrated in FIG. 6B, when lock 418 is selectively brought in the engaged position while maintaining the lock 416 in disengaged position, it results in inhibition of the rotation of the ring 412along its rotational axis, while allowing the rotation of intermediate gear 408 on its rotational axis 414. Since, the intermediate gear 408 is connected to the output gear 410 on the other side, the output gear can rotate in the opposite direction than that of the input gear 406 (or the input shaft 402). This allows actuation control device 400 to transmit the actuation force (motion) in the rotational direction, opposite to the rotational direction in which the actuation force is input to the input shaft 402 (or input gear 406). In other words, the activation/engagement of lock 418 and non-activation/disengagement of lock 416 allows the actuation control device 400 to transmit the actuation force (motion) from the geartrain (302, 304a, 306a and 308a) to the actuation operated features (through flexible shaft or other actuation force transmission means) in the rotational direction, opposite to the rotational direction in which the actuation force is input to the actuation control device 400.

[0058] FIG. 7 A through 7D illustrate exemplary views of the lock in accordance with an implementation. FIG. 7 A illustrates an exemplary assembled view of the lock 416 (coupling of the lock 416 with the ring is not shown for clarity) that upon selective engagement/activation inhibits the rotation of intermediate gear 408 on its rotational axis 414. FIG. 7B illustrates an exemplary exploded view of the general locking mechanism depicting placement of bearings 708, drum 706, ring cam 702 and plungers 704 that form part of the lock (416 or 418). FIG. 7C and FIG. 7D illustrate exemplary views of the locks 416 and 418, respectively, with bearings and drum removed for simplicity, in accordance with an implementation. FIG. 7E illustrates an exemplary view depicting activation of the locking mechanism in accordance with an implementation. As illustrated, upon activation of the ring cam 702 (for example, by rotation thereof), the plungers 704 (with the help of plunger springs 756) are forced to mesh within the profiles/sections 752 defined on the shaft 754, arresting the rotational movement thereof. In an implementation, the ring cam 702 is solenoid actuated cam. Accordingly, if this locking mechanism is fitted on the shaft, which defines the intermediate gear 408 as part thereof or which is coupled to the intermediate gear 408 (in which case it is denoted herein as lock 416), activation thereof forces the plungers to mesh within the profiles/sections defined on the shaft arresting the movement of the intermediate gear 408 on its rotational axis 414. Similarly, if this locking mechanism is fitted on the shaft, which defines the spur gear as part thereof or which is coupled to the spur gear (in which case it is denoted herein as lock 418), activation thereof forces the plungers to mesh within the profiles/sections defined on the shaft arresting the movement of the ring 412 along its rotational axis (as the spur gear is in continuous mesh with the ring surface, as illustrated in FIG. 6A and 6B).

[0059] FIG. 8 A through 8D illustrate exemplary views of the lock 416 that utilizes a ratchet and pawl mechanism for selective activation/engagement thereof in accordance with an implementation. FIG. 8A illustrates an exemplary top view depicting placement of the ratchet and pawl mechanism 802 (pawl denoted as 802-2and ratchet denoted as 802-1) in relation to the ring 412 and the intermediate gear 408 (input gear 406, output gear 410 and dummy gear 420 are not shown for the sake of simplicity). FIG. 8B illustrates an exemplary top view depicting a position of a disc 804, in relation to the ratchet and pawl mechanism 802, the ring 412 and the intermediate gear 408, in accordance with an implementation. As illustrated, disc 804can be used to apply a pushing force so as to mesh the pawl (802-2) with the ratchet (802-1) such that the movement of ratchet is locked. FIG. 8C and 8D illustrates exemplary views depicting the placement of the ratchet and pawl mechanism 802 in relation to the ring 412 and intermediate gear 408 (disc 804 is not shown for the sake of simplicity). As illustrated, the ratchet can be fixed to (or defined as an integral part of) the shaft that defines the intermediate gear 408 such that when the disc 804 is pushed, the pawl is meshed with the ratchet, blocking the movement of ratchet and thereby blocking the rotation of intermediate gear on its axis 414. FIG. 8E illustrates an exemplary view depicting a cross- sectional view of a lid 800 in association with an outside washer 806 and a disc 804 (configured as an inside washer) in accordance with an implementation. When the activation/pushing force is applied to the outside washer 806, the disc 804 (configured as an inside washer) is also pushed resulting in meshing of the pawl with the ratchet, blocking the movement of ratchet and hence, blocking the rotation of intermediate gear 408 on its axis 414. [0060] FIG. 9 illustrates an exemplary view depicting a conventional system that employs a plurality of actuators (or motors), each associated with the corresponding sets of geartrains, to actuate the actuation operated features.

[0061] FIG. 10 illustrates an exemplary view depicting the system, realized in accordance with the present disclosure, that employs actuation control devices 400 to actuate one or a plurality of the vehicular seat positioning means using a single actuator (or motor).

[0062] FIG. 11 illustrates an exemplary exploded view of a system 300 for operating one or a plurality of actuation operated features in accordance with an implementation of the present disclosure. As illustrated, the system 300 can include a motor 318, a gear train (including a plurality of bevel gears), one or a plurality of actuation control devices (generally shown as 304b, 306b, 308b and 310b) and a casing (shown as including a male motor casing 502 and a female motor casing 504) to encapsulate the system there within. As would be apparent to those skilled in the art, the system realized in accordance with implementations of the present disclosure can transmit the actuation force (motion) in the non-parallel and non-concurrent axis as well, offering boundless flexibility in packaging.

[0063] In accordance with an implementation of the present disclosure, the system is configured asa vehicle seat positioning system 1200. FIG. 12A illustrates an exemplary view depicting vehicle seat positioning system, the system including: a motorl202, a geartrain (generally shown as 1204), at least one actuation control device (shown as 1206a, 1206b, 1206c, and 1206d) and a plurality of vehicular seat positioning means (shown as 1210, 1220, 1230 and 1240). The actuation control device 1206, as realized in accordance with implementations of the present disclosure, can include a plurality of bevel gears, at least one ring operatively coupled to at least one bevel gear of the plurality of bevel gears, and a plurality of locks to allow for any or a combination of (a) no transmission of actuation force, (b) transmission of actuation force in same rotational direction or (c) transmission of actuation force in opposite rotational direction. In an implementation, locks comprise of solenoid locks. However, utilization of any other types of locks, including but not limited to mechanical locks, are completely within the scope of the present disclosure. As also illustrated, the actuation force can be transmitted to vehicular seat positioning meansl210, 1220, 1230 and 1240 using a plurality of flexible shafts (shown as 1208a, 1208b, 1208c and 1208d). In an implementation, vehicular seat positioning meansl210 is associated with the function of forward and backward movement (adjustment) of the vehicular seat. In an implementation, vehicular seat positioning meansl220 is associated with the function of lumbar adjustment of the vehicular seat. In an implementation, vehicular seat positioning meansl230 is associated with the function of tilting the seat in forward and backward direction. In an implementation, vehicular seat positioning meansl240 is associated with the function of height adjustment of the seat in the upward and downward direction. However, any other arrangements/configurations are completely within the scope of the present disclosure. In an implementation, as illustrated in FIG. 12B, the motor 1202 includes at least one position sensing device 1250 configured to detect position of the vehicular seat positioning means (shown as 1210, 1220, 1230 and 1240). The at least one position sensing device can provide feedback to the actuator and/or the system if in response to the actuation force, desired function has been elicited or not (for example, if lumbar adjustment of the vehicular seat is done, if the seat is tilted in forward or backward direction and the likes). In an implementation, the at least one position sensing device is a potentiometer. Preferably, all of the movable joints are configured with at least one position sensing device.

[0064] Although an exemplary embodiment for vehicle seat positioning application has been described, the bi-directional motor mechanism of the proposed invention maybe used in various other automotive applications, where a bi-directional control mechanism is required; for example, but not limited to, spoilers, power windows, doors, mirrors, etc. Additionally, the proposed bi-directional motor mechanism of the invention may be used for any other non- automotive applications, like, but not limited to, manufacturing, consumer appliances and devices, energy and utilities, etc.

[0065] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

ADVANTAGES OF THE INVENTION

[0066] The present disclosure provides a system for operating one or a plurality of actuation operated features using output from a single actuator and to provide an actuation control device therefor.

[0067] The present disclosure provides a cost effective, easy to handle, light-weight and compact actuation system, which requires minimum maintenance.

[0068] The present disclosure replaces the multiple actuator system with a single actuator system, while offering the same attributes. [0069] The present disclosure provides an actuator system with a flexible packaging in the vicinity or remotely alike.

[0070] The present disclosure provides for motion transfer to non-parallel and/or non- concurrent axis, offering limitless flexibility in packaging.

[0071] The present disclosure provides a system and method to overcome one or more disadvantages associated with conventional systems

[0072] The present disclosure provides method(s) associated with the actuation mechanism of seating systems of vehicles.

[0073] The present disclosure has advantages over other systems in that it is scalable and can be extended to any practical number of outputs with individual direction as well as motion control.

[0074] The present invention is advantageous as the unique arrangement allows for outputs to be extended to both circumferential and along the length thus offering enormous packaging feasibility.

Claims

We Claim:

1. A system for operating one or a plurality of actuation operated features, the system comprising: an actuator; a gear train configured to transmit an actuation force from the actuator to the one or a plurality of actuation operated features; and at least one actuation control device comprising a plurality of bevel gears, at least one ring operatively coupled to at least one bevel gear of the plurality of bevel gears, and a plurality of locks, wherein selective engagement and/or disengagement of one, some or all of the plurality of locks effects any or a combination of (a) no transmission of the actuation force from the geartrain to the one or a plurality of actuation operated features, (b) transmission of the actuation force from the geartrain to the one or a plurality of actuation operated features in a rotational direction, same as that of a rotational direction in which the actuation force is input to the at least one actuation control device, and (c) transmission of the actuation force in a rotational direction, opposite to that of the rotational direction in which the actuation force is input to the at least one actuation control device.

2. The system as claimed in claim 1, wherein said plurality of bevel gears comprises at least one input gear, at least one intermediate gear and at least one output gear.

3. The system as claimed in claim 1, wherein the at least one ring is operatively coupled to the at least one intermediate gear.

4. The system as claimed in claim 1, wherein the system further comprises at least one flexible shaft for transmission of the actuation force from the at least one actuation control device to the one or a plurality of actuation operated features.

5. The system as claimed in claim 1, wherein the system is configured to operate a plurality of actuation operated features by transmission of the actuation force from the actuator.

6. The system as claimed in claim 1, wherein the actuator comprises at least one position sensing device configured to detect position of the one or a plurality of actuation operated features.

7. An actuation control device for controlling transmission of an actuation force to one or a plurality of actuation operated features, the actuation control device comprising: a plurality of bevel gears, wherein the plurality of bevel gears comprises: at least one input gear operatively coupled to an input shaft;

at least one intermediate gear; and

at least one output gear operatively coupled to an output shaft;

at least one ring operatively coupled to the at least one intermediate gear; and a plurality of locks,

wherein selective engagement and/or disengagement of one, some or all of the plurality of locks effects any or a combination of (a) no transmission of the actuation force from the input shaft to the output shaft, (b) transmission of the actuation force from the input shaft to the output shaft in a rotational direction, same as that of a rotational direction in which the actuation force is input to the input shaft, and (c) transmission of the actuation force from the input shaft to the output shaft in a rotational direction, opposite to that of the rotational direction in which the actuation force is input to the input shaft.

8. The actuation control device as claimed in claim 7, wherein the selective engagement of a first lock of the said plurality of locks effects selective inhibition of motion of the at least one intermediate gear around its rotational axis, and wherein the selective engagement of a second lock of the said plurality of locks effects selective inhibition of motion of the at least one ring around its rotational axis.

9. The actuation control device as claimed in claim 7, wherein the selective engagement of the first lock and the selective disengagement of the second lock effects the transmission of the actuation force from the input shaft to the output shaft in a rotational direction, same as that of a rotational direction in which the actuation force is input to the input shaft, and wherein the selective disengagement of the first lock and the selective engagement of the second lock effects the transmission of the actuation force from the input shaft to the output shaft in a rotational direction, opposite to that of the rotational direction in which the actuation force is input to the input shaft, and wherein the selective disengagement of both the first lock and the second lock effects no transmission of the actuation force from the input shaft to the output shaft.

10. The actuation control device as claimed in claim 7, wherein the actuation control device is configured to operate a plurality of actuation operated features by transmission of the actuation force from a single actuator.