JP2002538031A - Non-Newtonian fluid locking device for vehicles - Google Patents

Abstract

(57) Abstract: A device provided for the positioning of an adjustable element (22) of a vehicle, comprising a fixed reference frame (20) on the vehicle, such as a dashboard or a firewall, and an adjustment. A device comprising a possible steering column (10), an adjustable element (22) arranged on the vehicle such as a pedal or a seat. Interconnecting the fixed reference frame (20) and the adjustable element (22) is a fluid locking mechanism (50), which provides an adjustable element relative to the fixed reference frame (20). Selectively position and hold the adjustable element (22) in that position. The fluid locking mechanism (50) is preferably a non-Newtonian fluid locking mechanism, which is an element (22) that can be adjusted to a desired location if it is selected using a magnetorheological fluid (97). Fix the position of. In order to provide additional safety to the vehicle occupant, the fluid locking mechanism includes an electronic microprocessor (556) that adjusts the locking force of the fluid locking mechanism (50) based on user input and dynamic events. And controlled by circuits.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Cross-reference of related applications]

This application is related to US Provisional Patent Application Nos. 60 / 113,084 (filed December 21, 1998) and 60 / 164,438 (filed November 9, 1999), the disclosures of which are incorporated herein by reference. Claim the benefits of the book.

[0002]

TECHNICAL FIELD OF THE INVENTION

The present invention relates generally to a device for adjusting the position of one object relative to another object, and more particularly to a vehicle seat, a control pedal, an inclined telescopic position of a steering column, and the like.

[0003]

[Prior art]

In the past, adjustable elements in motor vehicles have been temporarily positioned and fixed using mechanical locking systems. Such systems have included certain pawls, detents, or similar structures that lock slot teeth. This was the case when the steering column of the vehicle could be adjusted. Articulated and telescoping steering columns, adjustable seats and, more recently, adjustable control pedals have been devised to better serve different drivers and to make the vehicle more comfortable. Has been able to orient the controls to position for their personal needs and comfort. It is known that the ability of an operator to adjust the relative positions of the vehicle control elements is important in reducing driver fatigue and improving the ability to control the vehicle. However, the mechanisms used to provide adjustment are used only in a limited range of positions. And it is weak against mechanical fatigue and deterioration, and the manufacturing cost is high, and as a result, the cost is high. Furthermore, if special controls and components are positioned, they remain fixed and can be dangerous to the operator in the event of an accident. The present invention provides a myriad of adjustment positions and utilizes fewer mechanical elements than conventional devices, resulting in lower costs and the ability to reposition components in the event of an accident, Can be reduced.

[0004]

Summary of the Invention

In a broad aspect of the invention, there is provided an apparatus for interconnecting two parts, wherein in a first stage of the apparatus the two parts are adjustable in their relative position, but in a second step. At a stage, the device can fix the relative position of the two parts. More particularly, the device of the present invention includes a housing having at least one movable piston therein. Further, the interior of the housing has a flow of non-Newtonian fluid passing through at least one passage in the housing. Adjacent to or near the passage, there is a device for selectively generating or neutralizing a magnetic field in a region including the passage. Fluid inside the housing flows through the passage when the magnetic field is weak or absent, allowing the piston to move. When the magnetic field surrounding the passage reaches a predetermined intensity, the fluid undergoes a change and changes, stopping flowing and locking the relative position of the piston within the housing.

In another form, an apparatus according to embodiments of the present invention is used to adjustably fix the relative position of a steering column. The novel assembly includes an upper housing assembly coupled to a lower housing assembly, wherein the method is such that at least one of the upper and lower housing assemblies is articulated and nested relative to the lower housing assembly. Becomes possible. At least one non-Newtonian fluid locking mechanism interconnects the upper housing assembly and the lower housing assembly to selectively fix their relative position. The device includes a device that generates a magnetic field around at least a portion of a non-Newtonian fluid locking mechanism, and is intended to selectively activate and deactivate the fluid locking mechanism.

In another aspect of the invention, a non-Newtonian mechanical flow fluid locking mechanism includes a cylinder mounted on one of the upper and lower housing assemblies. Slidingly received within the cylinder is at least one shaft mounted on the shaft.
One piston extends from the cylinder and is mounted on one of the opposite sides of the upper and lower housing assemblies. Filling and sealing the cylinder is a non-Newtonian dynamic flow fluid that selectively changes its flow characteristics under the influence of a magnetic field. Fluid flow allows the piston of the cylinder to move when the magnetic field is absent or weak, and changes the relative position of the upper housing assembly relative to the lower housing assembly. When a magnetic field of a predetermined strength is present in the fluid, the flow state of the fluid changes, immobilizing the piston inside the cylinder and thus fixing the position of the upper housing assembly relative to the lower housing assembly. Devices for generating or extinguishing a magnetic field in a fluid include permanent magnets, electromagnets, wire coils, or combinations thereof.

In yet another aspect of the present invention, it is contemplated that the present invention may be utilized to lock the rotation of a steering column, and may function as a vehicle anti-theft system. The system will not operate until a key is inserted or some other system opens the device. Still further, when the present invention is used, the relative positions of the seats, control pedals, and other components in the vehicle can properly position the operator in an ergonomic, or comfortable, position. It is believed that.

[0008] Features provided by the present invention include methods and apparatus for selectively locking the relative position of one part to another. Examples include changing the tilt angle and / or longitudinal position of the steering wheel relative to the steering column. The compact nature of the present invention can reduce the cost and manufacturing time associated with assembly because punch claws and slots have been removed, resulting in less than conventional adjustable steering column assemblies. It allows parts, which results in cost savings. In addition, the mechanism can be easily joined with other safety mechanisms, and in the event of a collision, the position of the vehicle control elements can be changed, reducing the risk of injury to the operator. it can. The mechanism can be adjusted so that the operator absorbs certain types of shocks to reduce obstruction, or can reduce the risk of a complete collision by dropping sharply from the operator. Pre-positioned devices, such as pyrotechnic actuation devices, can be used in conjunction with the present invention to reposition vehicle components, such as steering wheels and columns, in the event of an accident.

[0009] Other components, advantages, objects and features of the present application will become apparent from a consideration of the following detailed description when taken in conjunction with the accompanying drawings.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

In the following description, "up", "down", "right", "left", "rear", "
The words "forward,""vertical,""horizontal," and derivatives thereof, as directed in FIG. 2, apply to the present invention. However, it is to be understood that the invention has various other directions than those described as the opposite.
In the accompanying drawings, the steps shown and the devices represented are described below and are merely exemplary embodiments of the inventive concept defined in the detailed description and the appended claims. It should be understood. Certain dimensions and other physical characteristics related to the embodiments disclosed herein are not to be construed as limiting unless otherwise stated in the claims.

The present invention is applicable in any situation where it is desired to adjustably position one component with respect to another, but the following description is simplified. For simplicity, a description will be given of a vehicle application, and for simplification, a steering column will be described. It commonly provides translation (nested movement) and / or rotational tilt (tilt tilt) of one component (the steering wheel) with respect to the other component (the steering column).

Referring to FIGS. 1-3, a steering column assembly 10 is shown mounted on a vehicle 12, such as a truck, having a steering wheel 14 at one end. The opposite end is interconnected to a steering gearbox 16 to move the front wheel of the vehicle. The upper portion (FIG. 2) of the steering column assembly 10 includes a lower housing assembly 20 interconnected to an upper housing assembly 22 to make the upper housing assembly articulated or tilted relative to the lower housing assembly. Alternatively, the movement of the upper housing assembly relative to the lower housing assembly can be parallel or telescoping. Or, they can do both. In the embodiment shown, the upper housing assembly 22 is pivotally coupled to its lower end 24 and the arms 28 of a yoke 30 mounted to the upper end 32 of the lower housing assembly 20 by pins 26. Pivotally connected to the The pivot axis defined by the pin 26 is preferably substantially horizontal and provides a limited arcuate rotational movement in a vertical plane.

The upper and lower housing assemblies 20 of the steering column assembly 10
And 22 surround a series of interconnected rotatable shafts (not shown) that connect to the steering wheel assembly 14 at one end and to the steering gearbox at the opposite end. A universal joint or similar connection interconnects with the shaft to allow tilting movement of upper housing assembly 22 relative to lower housing assembly 20. The telescoping shaft is mountable to the upper shaft and allows for longitudinal adjustment of the steering column assembly 14.

The lower housing assembly 20 typically includes a tubular member 36 suitably made of steel and has a collar 38 stably attached to the upper end 32 by welding or a similar connection. The arms 28 of the yoke 30 extend a sufficient distance from the longitudinal axis of the lower housing to receive the upper housing assembly 22. A generally arcuate opening 40 is provided at the end of each arm 28 to receive a guide pin 42 mounted on the upper housing assembly 22. The guide pins 42 interact with the arcuate openings 40 to define a limit for the inclination of the upper housing assembly relative to the lower housing assembly. In the illustrated embodiment, the arm 28 of the yoke 30 is stamped or otherwise manufactured from a steel bar blank and has a lower end welded to the collar 38 to provide an upper portion of the lower housing assembly 20. At the end 32, a rigid fork mount is created. Other information and examples of the nature of the pivotable connection between the upper housing assembly 22 and the lower housing assembly 20 are disclosed in U.S. Pat. No. 5,899,487, issued May 11, 1999. And its contents are incorporated herein by reference.

Referring to the embodiment shown in FIGS. 2 and 3, the lower and upper housing assemblies 20 and 22 are each interconnected by a locking mechanism 50, the preferred position of which is the horizontal centerline of the steering column assembly. And most preferably from the pivot entry point defined by the pin 26. The upper housing 22 has at least one and preferably two
It has two flanges 52, which are generally orthogonal at a point near the lower end 24 and define a bracket. A similar structure extends orthogonally from the tubular member 36, or typically extends vertically from the collar 38 identified by reference numeral 54. Mounted to bracket 52 by pins 56 and centered between bushings 58 is one end of locking mechanism 50. The opposite end of locking mechanism 50 is pivotally coupled to bracket 54.

FIG. 4 schematically illustrates an embodiment of a fluid locking mechanism 50 used in combination with the present invention. The locking mechanism 50 includes a housing or cylinder 66, preferably in the shape of a perfect cylinder closed at end 78, and having an opening 82 at an opposite end 80 to allow passage of the piston shaft 62. And The center or middle portion 84 of the housing 66 has a middle stenosis (RIP) to create a substantially uniform stenosis around the shaft 62. The particular dimensions of the RIP 84 will vary with the diameter of the shaft 62. The RIP 84 basically divides the housing 66 into two chambers 89 and 90, with respective pistons 68 and 7
Include 0 inside. Each of the pistons 68 and 70 has a diameter approximately equal to the inner diameter of the respective chamber. An O-ring or similar active seal 91 extends around the circumference of each piston to tightly seal the inner walls 92 of the chambers 89 and 90. The volume is adjusted for the inner surfaces 94 and 96 corresponding to
And the inner wall 92. This volume is filled with a non-Newtonian fluid 97, which can be any of U.S. Patent Nos. 5,277,281, 5,284,330, 5,492,312, 5,816,372, and 5,711,746 assigned to Lord Corporation. And the disclosure of which is incorporated herein by reference. The respective chamber portions outside the pistons 68 and 70 may be filled with air entering and exiting through holes 98 that extend through the ends 78 and 80 of the wall.

An adjacent RIP 84 located around the cylinder housing 66 is a device that generates a magnetic field inside the housing 66 and especially beyond the inside diameter of the RIP 84. In one embodiment, device 84 includes a wire coil 85 connected to a power supply 87 by a conductor 86. The current through conductor 86 and coil 85 is controlled by a switch 88 mounted on a steering wheel or a module mounted in or near the column, and possibly operated by a lever. The actual mounting method and position are not important as long as reasonable access is possible for the operator. In this embodiment, the power to the coil 85 is cut off by depressing the switch 88. In other embodiments, the device surrounding RIP 84 may include a split tubular magnet. Each half of the magnets are joined by a mechanical link, and each magnet is moved toward or away from the RIP 84 to lock or release the mechanism. Can be done.
In yet another form, a permanent magnet may be mounted in sufficient shape and size around the RIP 84 to generate a magnetic field or magnetic flux across the interior of the RIP 84. What may be disposed outside the magnet may be a wire coil similar to 85 that is connected to the circuit by wires. When the circuit operates, the electromagnetic force generated by the coil is RIP against the magnetic field generated by the magnet.
Force field regions are formed and cancel each other over 84, allowing fluid to move between the chambers. All forms of the device are preferably connected to a collision sensor, which cuts off the power supply and opens or neutralizes the magnet to unlock the device. In this way, a substantial part of the impact can be absorbed by mechanical absorption rather than by the operator.

In operation, the bias of circuit 86 generated by power supply 87 causes
The electromagnet 85 creates a magnetic field across the non-Newtonian fluid in the chambers 86 and 88, and the magnetic field spans a limited interior region created by the RIP 84 and the intermediate portion of the shaft 62, among others. The field changes until the fluid inside the area does not pass through the RIP and is sufficient to lock the pistons 68 and 70 in place. Due to this magneto-hydrodynamic situation, the relative position of the shaft relative to the housing is rigidly fixed, while the relative position of the upper housing 22 relative to the lower housing 20 is also fixed. To change the relative position of the upper housing, the operator depresses switch 88, a lever or other input device, to interrupt the field across RIP 84 to change the state of the fluid, and
Fluid flows through a passage defined by the shaft 4 and the shaft 62. By allowing the pistons to move within the respective chambers, the operator can change the relative position of the upper housing relative to the lower housing.
Turning off switch 88 restores the magnetic field and prevents fluid flow between the respective chambers. In the case of electromagnets, the force required to change the position of the piston varies widely and basically requires a fine adjustment of the locking mechanism. The resistance can be set variously by changing the volume and size of the liquid passage that moves as the piston moves. Other possible modifications include changing the diameter of the piston or the diameter of the piston through which the RIP passes. By varying one or more of these factors, the total force required to move the piston and the mounted shaft can be varied.

FIG. 5 shows another embodiment of a fluid locking mechanism, which uses a single piston design 150. The single piston design has a connector 16 at one end.
It includes a shaft 162 having zeros, the ends of which are configured to be coupled to brackets 52 or 54 using the same configuration in which the pins and bushings described above are disposed. The opposite end of shaft 164 enters piston 168, which may include a wire coil forming electromagnet 185. Leads from the coil extend through the core 163 of the hollow center shaft 162 to provide a connector 16
Take exit 165 near exit 0. The conductor 186 is connected to the switch 188 and the power supply 18.
7, and the power supply selectively excites the coil 185.

A portion of the piston 168 and a portion of the shaft 162 are disposed within a chamber 188 defined by a perfect cylinder 166. The outer diameter of the piston 168 varies from a size substantially equal to or less than the inner diameter of the chamber 188 to control the size and space of the periphery of the piston 168 and the inner wall 192 (hereinafter referred to as the peripheral volume). However, its peripheral volume provides the same function as the RIP described above. Chamber 188 of housing 166 is filled with a non-Newtonian fluid. All chambers 166 are preferably sealed to prevent leakage of liquid and the shaft 1
62 includes a passage extending therethrough. Although only a single seal is shown in the figures, a sufficient number of seals or bushings are used to hold the liquid and provide a tight seal to the chamber 188.

The two connector ends 160 and 174 are connected to respective brackets 52 and 54
And is biased to a circuit 186,
Since the coil 185 is energized, non-Newtonian fluid cannot move between the periphery of the piston 168 and the inner wall 192. This creates a situation where the piston 168 and the shaft 162 are relatively rigidly fixed to the cylinder or housing 166. By operator depressing switch 188 and powering down circuit 186, the state of the fluid changes, causing the fluid to move from the periphery of piston 168 and to change the position of the column. . Although not shown, it is envisioned that piston 168 extends far and fills the interior of the cylinder of housing 166. The outlet may extend through the piston to allow fluid to pass through and may be metered using injection to adjust the resistance.

In both of the embodiments described above, the locking device is a Coulomb
) Or Bingham locks. In other words, this configuration approximates an ideal lock where the generated force is independent of piston speed and where large forces can be generated at low or zero speed. This independence increases the controllability of the lock, making it a function of the force of the magnetic field, i.e., the field force generated by adjacent magnets or the function of the current flow in the circuit. Become. Basically, the flow of the magnetic flux depends on several factors in the fluid passage. That is, they are the smallest transverse cross-sectional area of the piston head (68, 70 or 168) in the winding state of the coil 185, the smallest transverse cross-sectional area of the magnetically permeable material that finds a return from magnetic flux, and Such as the surface area of the magnet to be pulled, all of which have the values specified in US Pat. No. 5,284,330.

According to the present invention, the deceleration at which the operator hits the steering column in the event of a collision (
It can also be used to reduce deceleration). This is achieved by breaking the circuit using a switch connected to the vehicle's collision sensor. With a certain threshold, the sensor shuts off the bias in the circuit and allows the electromagnet to stop and return the steering column to its original position. In a preferred embodiment, an explosive-based actuator is
The mechanism that locks the flow of non-Newtonian fluid in the event of a collision can be attached to the lower bracket 52 of the power supply, the power is cut off, and the explosive system pushes the steering column down and away from the operator, thereby The airbag deployed in the steering column can sufficiently absorb the impact.

Referring to FIG. 6, a portion of the telescoping steering column assembly 300 is shown at one end 304 to include a shaft 302 configured to be mounted on a steering wheel. The opposite end 303 of the shaft is inside the piston 306, which has a diameter slightly smaller than the diameter of the shaft 302. The piston 306 is attached to the shaft 302 by the neck 308.
Is joined to. Mounting part 308 of piston head 306 and shaft 302
Is received in a cylinder 310 which is closed by a seal 312 to define a fixed volume 314 similar to the volume defined by cylinder 166 and piston 168 of the embodiment shown in FIG. I do. The volume 314 is filled with a non-Newtonian fluid 316 and the piston head 308 and seal 31
2 completely encloses a portion of the shaft 302 that extends through 2. Cylinder housing 310 is formed within one end of solid shaft member 318, which forms the remainder of the shaft in the upper or lower housing. Lower shaft 31
A keyway may be provided inside the top or along the end of the shaft 318 and along the top neck 308 to prevent rotation of the shaft 302 relative to 8. The keyway allows axial movement, but locks the two shafts in the rotational direction.
Each shaft 310 and 302 is journaled, preferably using bearings well known in the steering art.

In this configuration, an electromagnetic coil 320 is disposed on an outer portion of the upper end of the shaft 318 to generate magnetic flux in a fluid 316 disposed within the chamber 314 and the fluid is transmitted to the piston 308. To prevent it from passing through or around it. In another embodiment, the shaft 302 is hollow and provides a passage for the conductor, which may pass to the coil formed inside the piston 306 to create the required magnetic flux. The circuit used is similar to that described above and can be used in combination with a collision sensor, so that the relative nesting of the shaft 302 can be changed relative to the hollow shaft 318.

In yet another embodiment of the present invention, a non-Newtonian fluid locking mechanism is provided for controlling relative seat back height, reclining angle and horizontal position of the seat relative to the seat portion and the steering wheel. Can be used. FIG. 7 schematically illustrates these various other applications. For example, the seat base 40
0 may be supported on track 402 and mounted to carriage 404 by a plurality of locking devices represented by 406. In addition, the angular position of the seat back 408 may be controlled by a pedestal 400 and a locking device 410 interconnected to the seat back 408. Finally, the horizontal movement of the carriage is controlled by a locking device 412, one end of which is mounted on the floor or vehicle frame and the other end mounted on the movable pedestal 404. As in the previous embodiment, one or all of these locking devices 406, 410 and 412 can be used to set the relative position of the sheet elements. In addition, an explosive-based positioning system can be incorporated to change the position of the seat in the event of a collision.

As briefly described above, the present invention can be used to reduce the impact of an operator colliding with the steering wheel during a collision. FIG. 8 schematically shows an assembly that performs such a function. In this embodiment, locking device 550 includes a coil 552 coupled to a controller 556 (CLR) by conductor 554, which is connected to ground 557 and power supply 559 for the circuit. The controller 556 has a plurality of inputs and the tilt adjustment switch 55
8, weight sensor 560, height sensor 562, ignition sensor 564
, And a plurality of inputs including, but not limited to, a collision sensor 566. Additional sensors may include an acceleration system that indicates the direction of the impact and a sensor that measures the speed of the vehicle.

The controller 556 can use a microchip, a programmable logic controller, a microcomputer, or a processor that can use the data provided by the various sensors to supply the necessary current to the conductor 554. Once determined, the strength of the magnetic field generated by the coil 552 can be controlled. In other words, the controller 556 is capable of dynamically changing the locking characteristics according to a variety of inputs, so that the impact of the operator can be absorbed by the column rather than by the occupant. In addition, this same circuit can include a memory circuit to evoke special matters regarding special events, for example, the system may use the speed and direction in which the operator is driving or the seat belt may be used. Can be shown. The system can also record the direction and force of the impact. All of this information is available to determine facts related to the accident. This same controller 556 can also store information about preferred positions for the operator, such as columns, control pedals, seat positions, and the like.

FIG. 9 shows a steering column assembly 600 incorporating the present invention incorporating a tilting column and a telescoping column. The steering column assembly 600
A rigidly mounted portion 606 of the steering column includes a lower housing assembly 602 mounted by a flange 604 to provide a vehicle firewall,
It can be mounted on a dash assembly or other rigid structure. The interior of lower housing assembly 602 is designed to receive a nested inner housing assembly or shuttle 608. The inner housing assembly or shuttle 608 is configured to slide within the lower housing 602 between extended and retracted positions along an axis parallel to the longitudinal axis of the lower housing assembly 602. Shuttle 608 is specially shaped to be received within a passage formed into a shape corresponding to the interior of the lower housing assembly, and the surface is bearing-treated so that the inner housing is relative to the lower housing. It can be moved smoothly. The inner housing end 610 is the lower housing assembly 602
Extending from the bracket to accommodate a set of brackets 612, the set of brackets each being disposed on opposite sides of the inner housing. Each bracket 612 is substantially L-shaped or dog-shaped, such that a portion of foot 614 is securely attached to end 16 of inner housing assembly 608, and another portion of foot 616 is Part 6
It extends at an angle toward 14 and substantially abuts the outside of lower housing assembly 602.

Pivotly coupled between the ends of the feet 614 is a lower end 618 of the upper housing assembly 620. The coupling allows the upper housing assembly 620 to perform angular movement with respect to a substantially horizontal axis defined by bolts 622 with respect to the lower housing assembly 602. For details of the connection between the bolt and the mounted element, the reader is referred to U.S. Pat. No. 5,899,497, issued May 4, 1999, which is also incorporated herein by reference. It is possible to see the book. In the embodiment shown in FIG. 9, the upper housing assembly 620 also includes a pre-calculated sized bracket 624 having a plurality of cut-out portions 626 for receiving a variety of instruments. Extending from the housing 620 near the lower end 168 is a protruding support flange 628. Flanges 628 are attached to lower foot 616 of each bracket 612 at reference numeral 630.
Interconnected by a fluid locking mechanism indicated by. A detailed illustration of the fluid locking mechanism 630 is made with reference to FIG.

The fluid locking mechanism 630 includes a housing 632 having at least one slidably disposed piston 634 defining at least two chambers 636 and 638. Extending from the piston is a piston shaft 640 that extends from the housing 632 and terminates in a U-shaped hook (
Clevis) 642. Clevis 642 may be pivotally mounted to protruding support flange 628 by one or more bolts 644 (FIG. 9). The housing 632 is also similarly rotatable by bolts 646 that extend through the foot and into a mounting plate 648 formed on the exterior of the housing 632.
Attached to the end of the With the fluid locking mechanism 630 unlocked, the upper housing 620 can be tilted or pivoted about the connection defined by the bolt 622. The pivotable coupling provided by bolts 644 and 646 allows the angular orientation of fluid locking mechanism 630 to change as upper housing 620 moves with respect to the pivot point.

Referring again to FIG. 10, the housing 632 is preferably cylindrical and opens at one end 650 to allow for the insertion of various elements therein. Piston shaft 640 extends through a sealed opening 652 defined in opposite end 654 of housing 632. Disposed concentrically within the interior 654 of the housing 632 and disposed within and away from the inner wall of the housing 632 is an inner sleeve 656, which includes a piston 63.
4 has an inner diameter approximately equal to the outer diameter. Inner sleeve 656 includes an end cover 6 received within each end of its housing, i.e., end 650 of housing 632.
At 58, it is held by one or more shoulders. The end cap 658 is positioned and sealed using a C-shaped fitting, the sealing of which is conventional. Housing 632,
The interior of the chambers 636 and 638 and the volume between the housing inner wall 654 and the inner sleeve 656 is filled with a non-Newtonian fluid 660. Fluid in the chamber 636 can flow into the chamber 638 through a space 662 or perforation located at the end of the sleeve 656 through the peripheral volume between the sleeve 656 and the inner wall 654. The flow of fluid from one chamber to another can be controlled in a myriad of ways. Basically, the rate at which fluid is exchanged is determined by the size of the smallest opening defined by the cross-sectional shape of the passage 662 or surrounding passages. The locking force of the mechanism is controlled according to the strength of the magnetic field or magnetic flux through those small areas. In the present invention, a coil for supplying an electromagnetic field generated by applying a set current is provided. Other permanent magnets can be used, the magnetic field of which is canceled by applying an electromagnetic field. Although the electromagnetic field is depicted as being generated at one end of the sleeve 656, an electromagnetic force or field can also be generated in the other region of the locking mechanism to alter the flow state of the fluid 660. For clarity, the type of fluid used in the fluid locking mechanism is basically similar to the fluid described above and is available from Lord Corporation. By changing the magnetic flux, the properties of the fluid 660 change. In some situations, fluid cannot move through the stoma 662 and essentially retains the rest of the fluid in the respective chamber, thus fixing the relative position of the piston 634 within the housing. . Therefore, to change the relative tilt angle of the upper housing 620 relative to the lower housing assembly 602, the operator need only remove the electromagnetic field present inside the fluid locking mechanism.

FIGS. 11 and 12 show another embodiment of the fluid locking mechanism, which is applied to fix the translational or telescopic position of the two elements.
FIG. 11 schematically illustrates the relationship between the lower housing assembly 602 and the lower rigid structure 606 and interconnecting flange 604. Extending longitudinally through lower housing 602 is an inner tubular member identified by reference numeral 670 that is configured to translate longitudinally relative to lower housing 602. For purposes of illustration, element 670 is the same as shuttle or inner housing assembly 608. Extending concentrically through inner tubular member 670 is telescopic shaft 672, which extends through bearing 674 and into tubular member 670 a predetermined distance. In a preferred embodiment, a portion of shaft 672 extending into tubular housing 670 is longitudinally grooved. Over the grooved end, telescopically received is a second shaft 676, which is adapted to femalely couple to the grooved end of shaft 672. Shaft 676 extends through the opposite end of tubular member 670 and is supported by bearings at end 678 or elsewhere along its length. End 6 of tubular member 670
78 can also be configured to be interconnected by an adapter member that is not shown as being received over the end in a bracket such as 612 described above. The mounting member that interconnects the end 678 of the tubular member 670 to the bracket 612 may have a diameter sufficient to position the bracket 612 substantially parallel to and near the outer housing 602.

The housing 602 is typically tubular and is substantially closed at end 678 by an end wall 680. The opposite end 682 includes a removable end lid 68.
4 closed. Both end wall 680 and end lid 684 have openings or passages defined for receiving tubular member 670 therethrough.
Conventional techniques of prior art sealing and bushing include 688 and 690 in the tubular member 67.
It may be provided for a hard and liquid tight seal around the zero.

In the middle of the tubular member 670 is an electromagnetic coil or magnet 692 housed in an armature 694, usually positioned and positioned by a snap ring 696 fitted in a groove at each end of the armature 694. Is held. Armature 69
In the case of a wire coil mounted on 4, a single hole is provided in the armature through which the wire leads pass and are connected to the circuit through the tubular member 670. Pins are provided extending from the tubular member to prevent the armature from rotating about the tubular member 670 and entering slots formed on the underside of the armature to prevent rotation of the armature relative to the tubular member. So as to fix it. If a similar arrangement is required, it can be used to fix the relative rotational position of the inner tubular member 270 relative to the housing 602. In other embodiments, the mechanism of the outer tube 670 prevents rotation. For example, each bracket 612 may have a grooved structure as indicated by reference numeral 695 (FIG. 9), which is covered and locked by a cam as indicated by reference numeral 697 (FIG. 11). You.

Disposed within housing 602 is an inner sleeve 698 having an outer diameter approximately equal to the inner diameter of housing 602 and located between end wall 680 and end lid 684. I do. The inner diameter of the sleeve 698 varies, but cannot be smaller than the outer diameter of the armature 694 and the magnet or electromagnetic coil 692. In a preferred embodiment, the inner diameter of the sleeve 698 is
Is set such that there is a small gap on the order of 1-2 millimeters between the outer diameter of the sleeve 698 and the inner diameter of the sleeve 698. In this way, a narrow passage is formed in the chamber 7
00 and chamber 702. The narrow passage interconnecting the two chambers is filled with a non-Newtonian fluid 704 similar to that described above.

When an electromagnetic field is present across the gap between chambers 700 and 702, the liquid 704 inside the gap and the constant fluid in each chamber will change its state from a normal fluid to a more viscous substance. And make it impossible to flow through the gap. Due to the special condition of the fluid, the fluid between the respective chambers cannot be exchanged, and therefore locks the armature and causes the tubular member 67
0 is fixed at a position relative to the housing 602. When the electromagnetic field is neutralized, ie, removed, the non-Newtonian fluid returns to its natural state and the tubular member 6
As 70 moves, fluid can flow through the gap from one chamber to another. The grooved ends of shafts 676 and 672 also allow for relative telescopic adjustment depending on the extent to which shaft 676 moves relative to tubular housing 670.

In each of the embodiments described above, non-ferrous materials can be used for various elements in or near the magnetic / electromagnetic element. By using non-ferrous substances,
Polarity or magnetization, which results in a magnetic field that can affect the function of the locking mechanism, can be avoided. Acceptable materials include bronze, aluminum, and polar substances.

Various changes, embodiments, and modifications will be apparent to those skilled in the art from a reading of the above detailed description. For example, although electromagnets have been described, it is clear that permanent magnets can be used to provide partial or full magnetic fields. The strength of the magnetic flux passing through the fluid can be changed by changing the distance of the magnet from the RIP or cylinder. The present invention uses the devices disclosed in U.S. Patent Nos. 5,492,312, 5,711,746, and 5,816,372, issued under the name of Road Corporation, to control the rotation of a steering wheel shaft or similar structure. Further intended. With the advent of electronic steering systems, it is also contemplated that these devices could be used to provide haptic feedback adjustment via the steering wheel to provide the operator with a range of steering control settings. Can be In yet another embodiment, the locking mechanism can be used in combination with a force sensor located on a vehicle steering wheel via a computer. The sensor generates a signal that is processed by a computer to change the magnetic flux of the locking mechanism in the event of an accident, and the locking mechanism can absorb a portion of the energy that causes impact between the occupant and the steering wheel. Finally, implementation of the locking mechanism involves adjusting the relative position of structures such as seats and structures such as instrument panels and the like. All such changes, which come up from the scope of the foregoing detailed description;
It should be understood that the examples and modifications are part of the present invention.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of one environment to which the present invention is applied.

FIG. 2 is an enlarged plan view of the present invention shown in FIG.

FIG. 3 is a bottom view of the present invention shown in FIG.

FIG. 4 is a schematic cross-sectional view of one embodiment of the present invention shown in FIGS. 2 and 3.

FIG. 5 is a schematic sectional view of another embodiment of the present invention shown in FIGS. 2 and 3.

FIG. 6 is a schematic sectional view of an embodiment of the telescopic assembly of the present invention.

FIG. 7 is a schematic view of another application of the present invention.

FIG. 8 is a schematic diagram of an electric circuit used in combination with the present invention and capable of adjusting the characteristics of the present invention in response to a certain input;

FIG. 9 is a perspective view of a tilted telescopic steering column using another embodiment of the present invention.

FIG. 10 is a side sectional view of the present invention shown in FIG. 9;

FIG. 11 is a perspective view of an embodiment of the present invention in which components are adapted to translate.

12 is a longitudinal sectional view of the present invention shown in FIG.

[Explanation of Signs of Main Parts]

 Reference Signs List 10 steering column assembly 12 vehicle 14 steering wheel 20 upper housing assembly 22 lower housing assembly 30 yoke 40 arcuate opening 50 locking mechanism 62 shaft 84 narrowed middle part (RIP)

[Procedural Amendment] Submission of translation of Article 34 Amendment

[Submission date] June 20, 2000 (2000.6.20)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Contents of correction]

[Claims]

10. The apparatus of claim 8, wherein the fluid locking mechanism comprises: a housing; and at least one piston slidably disposed within the housing to define at least two chambers. A piston shaft extending from the piston and out of the housing; a fluid within the housing and moved between the at least two chambers by at least one passage; and selectively over the at least one passage. A device for applying a magnetic field, wherein one of the housing and the piston shaft is mounted on the fixed reference frame, and one of the opposite sides of the piston shaft and the housing.
An apparatus mounted on the adjustable control element.

11. The apparatus of claim 8, positioned away from the fluid locking mechanism, in order to control the fluid locking mechanism based on a plurality of data inputs, mounted so as to send the fluid locking mechanism The apparatus further comprising an assembled assembly.

21. The apparatus of claim 19, wherein the lower housing assembly pivotally connects one end to one end of the upper housing assembly. .

[Procedure amendment]

[Submission date] April 2, 2002 (2002.4.2)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Contents of correction]

[Brief description of the drawings]

FIG. 1 is a schematic diagram of one environment to which the present invention is applied.

FIG. 2 is an enlarged plan view of the present invention shown in FIG.

FIG. 3 is a bottom view of the present invention shown in FIG.

FIG. 4 is a schematic cross-sectional view of one embodiment of the present invention shown in FIGS. 2 and 3.

FIG. 5 is a schematic sectional view of another embodiment of the present invention shown in FIGS. 2 and 3.

FIG. 6 is a schematic sectional view of an embodiment of the telescopic assembly of the present invention.

FIG. 7 is a schematic view of another application of the present invention.

FIG. 8 is a schematic diagram of an electric circuit used in combination with the present invention and capable of adjusting the characteristics of the present invention in response to a certain input;

FIG. 9 is a perspective view of a tilted telescopic steering column using another embodiment of the present invention.

FIG. 10 is a side sectional view of the present invention shown in FIG. 9;

FIG. 11 is a perspective view of an embodiment of the present invention in which components are adapted to translate.

12 is a longitudinal sectional view of the present invention shown in FIG.

13 is a partially enlarged sectional view of the present invention shown in FIG.

[Description of Signs of Main Parts] 10 Steering column assembly 12 Vehicle 14 Steering wheel 20 Upper housing assembly 22 Lower housing assembly 30 Yoke 40 Bow-shaped opening 50 Locking mechanism 62 Shaft 84 Middle part of constriction (RIP)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) // A47C 1/024 A47C 1/024 B60N 2/16 B60N 2/16 2/22 2/22 (81) Designated countries EP (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE), CA, JP, MX, US (72) Inventor Bowellman Brian See. 49082 Quincy, Michigan, United States. Chicago Street 67 F term (reference) 3B087 BD03 BD13 3B099 AA05 BA04 CA35 3D030 DD22 DD64 DD73 DE27 3J066 AA04 AA23 BA10 BD10 3J069 AA50 DD25 EE63

Claims (21)

[Claims] 1. An apparatus for selectively fixing the relative position of an adjustable steering column, the apparatus including a first housing having a lower end, and a first housing having a lower end. A second housing mounted to allow at least one of an articulated and telescoping position of the first housing; and at least one non-Newtonian fluid locking mechanism. Interconnecting a first housing with the second housing to selectively secure at least one of the articulated and telescoping positions of the first housing relative to the second housing. Equipment to do. 2. The apparatus of claim 1, wherein a state of a magnetic field around at least a portion of the at least one non-Newtonian fluid locking mechanism is selectively changed to cause the at least one non-Newtonian fluid locking. The apparatus further comprising an assembly for selectively activating and interrupting the mechanism. 3. The apparatus of claim 2, wherein the at least one non-Newtonian fluid locking mechanism includes: a third housing coupled to one of the first and second housings; And a first and a second in the third housing.
At least one piston slidably disposed within the third housing defining at least one of the chambers; extending from the at least one piston and from the third housing;
A shaft having an end coupled to opposing ones of the first and second housings; a non-Newtonian fluid filling the third housing; and fluidly flowing through the at least the first and second chambers. At least one passage in said third housing in communication with said passage, said passage allowing said non-Newtonian fluid to be selectively movable between said at least said first and second chambers. An apparatus characterized by the above. 4. The apparatus of claim 3, wherein said non-Newtonian fluid locking mechanism controls a tilt angle of said first housing relative to said second housing. 5. The apparatus of claim 3, wherein said non-Newtonian fluid locking mechanism controls a telescoping position of said first housing relative to said second housing. 6. The apparatus of claim 4, wherein the non-Newtonian fluid locking mechanism is outside the first and second housings. 7. The apparatus of claim 5, wherein the non-Newtonian fluid locking mechanism is within at least one of the first and second housings. 8. An apparatus for selectively positioning a control element of a vehicle, comprising: a fixed reference frame; an adjustable control element; and an interlock between the fixed reference frame and the adjustable control element. A liquid locking mechanism for connection. 9. The apparatus of claim 8, wherein the fixed reference frame includes at least one of a panel, a floorboard, a vehicle frame, a hardware, and a post. 10. The apparatus of claim 8, wherein the adjustable control element comprises:
An apparatus including at least one of a steering column, a steering wheel, a brake pedal, a clutch pedal, an accelerator pedal, a seat, a bottom surface, a seat back, a headrest, and an armrest. 11. The apparatus of claim 8, wherein the fluid locking mechanism comprises: a housing; and at least one piston slidably disposed within the housing to define at least two chambers. A piston shaft extending from the piston and out of the housing; a fluid within the housing and moved between the at least two chambers by at least one passage; and selectively over the at least one passage. A device for applying a magnetic field, wherein one of the housing and the piston shaft is mounted on the fixed reference frame, and one of the opposite sides of the piston shaft and the housing.
An apparatus mounted on the adjustable control element. 12. The apparatus of claim 8, wherein the apparatus is located remotely from the fluid locking mechanism and is mounted for delivery to the fluid locking mechanism to control the fluid locking mechanism based on a plurality of data inputs. The apparatus further comprising an assembled assembly. 13. A method for selectively positioning an adjustable element for a vehicle, the method comprising: providing a stationary reference frame for the vehicle; and providing an adjustable element near the stationary reference frame. Interconnecting the adjustable element to the stationary reference frame by a fluid locking mechanism, wherein the fluid locking mechanism adjusts the adjustable element relative to the stationary reference frame in a first state. Locking the adjustable element to a selective position relative to the stationary reference frame in a second state. 14. The method of claim 13, further comprising controlling the fluid locking mechanism based on inputs from a plurality of sensors in the vehicle. 15. The method of claim 13, wherein the fluid locking mechanism is activated in one of the first and second states in response to an input from at least one sensor in the vehicle substantially immediately. The method further comprising the step of: 16. The method of claim 13, wherein the step of providing a stationary frame of the vehicle includes a vehicle instrument panel, a portion of a steering column, a floorboard, and a frame of the vehicle. A method comprising selecting a non-movable vehicle element. 17. The method of claim 13, wherein the steps of providing an adjustable element near the stationary reference frame include: a tilting steering column, a telescopic steering column, an accelerator pedal,
A method comprising selecting at least one of a brake pedal, a clutch pedal, an adjustable seat, and an adjustable seat back. 18. An apparatus for selectively positioning an adjustable steering column, comprising: a fluid locking mechanism having an outer housing slidably receiving at least one position; and from the at least one piston and the outer housing. A piston rod extending out of at least one end of the piston rod; and a free end of the piston rod connected to one of an upper and lower housing assembly for the steering column; Opposite one of the upper and lower housing assemblies
An apparatus characterized by being connected to two. 19. The apparatus of claim 18, wherein the adjustable steering column comprises a tilt adjustable steering column. 20. The apparatus of claim 18, wherein the adjustable steering column comprises a telescoping steering column. 21. The apparatus of claim 19, wherein the lower housing assembly pivotally connects one end to one end of the upper housing assembly. .