Telescope assembly and energy absorption device for steering column

Abstract

To provide an assembly capable of easily being adjusted in a tilt direction and / or telescopic direction.SOLUTION: An assembly for a steering column assembly 10 includes an engagement plate and a telescope plate at least partially disposed within the engagement plate. The engagement plate is configured to locate between a column tube 20 and the telescope plate of the steering column assembly 10. The engagement plate and the telescope plate have one or more features for engaging with or contacting each other to provide energy absorption during an impact exceeding a threshold load. These features may include one or more projections or protrusions, one or more slots, one or more ribs, or a combination thereof.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application claims the benefit of U.S. Provisional Patent Application No. 63 / 040608, filed June 18, 2020, the disclosure of which is incorporated herein by reference for all purposes.

[0002] (Technical field) Generally, the present teachings relate to an improved collapsible steering column assembly and related methods. More particularly, the present teachings relate to an inwardly collapsible tilt and / or telescopically adjustable steering column system. [Background technology]

[0003] During a vehicle collision, there are typically two impacts: a primary impact, where the vehicle strikes another object; and a secondary impact, where a vehicle occupant strikes a vehicle component. For example, a vehicle driver may be struck by inertia and impact the steering wheel. To help protect the driver from such a secondary impact, it is common practice to use a crash-absorbing steering column. A collapsible steering column system is one example of a crash-absorbing steering column.

[0004] The structure of the crash-absorbing steering column device is such that, when a driver experiences a secondary impact, the impact energy acts on the steering column in a forward direction of the vehicle. The steering column can move forward (e.g., during a collapse stroke) away from one or more fixed points to the vehicle body, absorbing the impact energy during the collapse stroke. An externally collapsible column assembly is an example of a system in which the entire column translates relative to its fixed points. An internally collapsible column assembly will typically be fixed within the vehicle at one or more fixed points near one end of the assembly. During the secondary impact collapse stroke, the components of the assembly collapse longitudinally (e.g., generally within the volume they occupy within the vehicle during normal operation, i.e., generally within their "footprint" within the vehicle), but generally do not collapse beyond a certain distance relative to the predetermined fixed points. In this way, an internally collapsible system can have a stroke but remain fixed to the vehicle at one or more fixed points.

[0005] For many applications, the steering column assembly incorporates either or both a tilt or telescopic function. In such applications, it is common for a vehicle user to employ a lever to manually perform such functions. By way of example, this may be known as a "manual rake and reach" steering column assembly, where the assembly has both tilt and telescopic functions, and a lever is provided that the vehicle user can manually release to allow tilt and telescopic adjustment to a selected position, and then re-engage to lock the steering column in the selected position.

[0006] Current assemblies require the use of multiple multi-plates. These multi-plates are expensive, take up a lot of space within the assembly, or both. The attachment of the multi-plates requires complex and heavy structures to allow them to break away in the event of a secondary impact. Additionally, the strength-to-weight performance of the multi-plates can be lower than desired. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] US Patent Publication No. 2008 / 0236325 [Patent Document 2] US Patent Publication No. 2008 / 0111363 [Patent Document 3] US Patent Publication No. 2009 / 0174177 [Patent Document 4] US Patent Publication No. 2010 / 0300238 [Patent Document 5] US Patent Publication No. 2010 / 0032933 [Patent Document 6] US Patent Publication No. 2015 / 0096404 [Patent Document 7] U.S. Patent No. 8,047,096 [Patent Document 8] U.S. Patent No. 9,428,213 [Patent Document 9] U.S. Patent No. 9,415,795 [Patent Document 10] US Publication No. 2013 / 0233117 Summary of the Invention [Problem to be solved by the invention]

[0008] Despite efforts to improve collapsible steering column assemblies (e.g., internally collapsible steering column assemblies), there remains a need for alternative assemblies, particularly assemblies that are easily adjustable in tilt, telescopic, or both. There remains a need for these assemblies to be easily installed in a vehicle, to have reduced weight, to have reduced component space, to be easily removed, or a combination thereof. There also remains a need for assemblies that include components that can translate one or both of a user's control device (e.g., a lever) and a steering wheel (if used) forward and away from the vehicle user upon an impact, such as a secondary impact. [Means for solving the problem]

[0009] The following U.S. patent documents may be relevant to the present teachings and are incorporated herein by reference for all purposes: U.S. Publication No. 2008 / 0236325, U.S. Publication No. 2008 / 0111363, U.S. Publication No. 2009 / 0174177, U.S. Publication No. 2010 / 0300238, U.S. Publication No. 2010 / 0032933, and U.S. Publication No. 2015 / 0096404, as well as U.S. Patent Nos. 8,047,096, 9,428,213, and 9,415,795. U.S. Publication No. 2013 / 0233117 may have teachings relevant to the present teachings and is incorporated herein by reference.

[0010] The present teachings utilize a simple and elegant construction approach that allows the use of relatively few components to achieve a steering column assembly, such as a collapsible steering column assembly. The steering column assembly may be an adjustable (e.g., with respect to tilt and / or telescoping) steering column assembly. For example, although there is applicability to externally collapsible assemblies (which are contemplated within the scope of the present teachings), the steering column assembly herein may be an internally collapsible assembly. The assembly may be an assembly that is secured within a vehicle at one or more fixed points such that, upon a secondary impact, the steering column assembly resists substantial forward movement beyond the one or more fixed points (e.g., greater than about 10 mm or greater than about 20 mm). The assembly may be a collapsible steering column assembly that exhibits relatively good energy absorption characteristics, particularly during a secondary impact. The assembly may be a collapsible steering column assembly that exhibits longitudinal displacement (e.g., forward translation) of one or more components of the assembly (e.g., the column tube) upon a secondary impact.

[0011] As a general means of characterizing the present invention, a collapsible steering column assembly is envisioned. It can be an internally collapsible assembly or an externally collapsible assembly. However, an internally collapsible assembly, in which at least a portion of the assembly is fixed against any substantial forward movement within the vehicle (e.g., about 50 mm or less, about 20 mm or less, or about 10 mm or less), is particularly promising. The steering column assembly can include a steering wheel position adjustment portion (e.g., a device adapted to adjust the tilt and / or telescoping position of the steering wheel relative to the vehicle operator, such as a telescopic tubular device). The steering column assembly can include one or more brackets for at least partially supporting the steering wheel position adjustment portion and / or for mounting the assembly within the vehicle. The steering column assembly can include a fixing member (e.g., a tilt bolt, as discussed elsewhere herein, or other elongated member adapted to apply a fixing force, e.g., to help maintain the steering column assembly in a desired position) for fixing the position of the steering wheel position adjustment portion (e.g., by operation of a lever configured for use by the operator to apply or remove a fixing force). During normal operation, the steering column assembly may be in a securely engaged position in which at least a portion of the steering shaft support structure (e.g., the column tube, the column housing, or both) is secured in a fixed position on the steering column assembly. The securely engaged position may be a user-selected adjustment position on an adjustable position steering column assembly.

[0012] The present teachings contemplate an adjustment subassembly for a steering column assembly. The adjustment subassembly can include a telescope plate, which can be configured to be secured to a column tube of the steering column assembly. The adjustment subassembly can include a locking pin. The locking pin can have one or more features on one end configured to engage with one or more features of the telescope plate. The adjustment subassembly can include a preload plate. The preload plate can be configured to receive at least a portion of the locking pin (e.g., an end of the locking pin opposite the feature configured to engage with the telescope plate). The adjustment subassembly can include a user-operated device, such as a lever, to effect engagement and / or disengagement of the locking pin and the telescope plate, for example, by contact with the preload plate.

[0013] The telescopic plate can be generally flat. The telescopic plate can include a toothed surface or other friction or engagement surface extending over at least a portion thereof. The telescopic plate can include one or more features for securing and / or receiving the telescopic damper. The telescopic plate can include, for example, a curved portion at one end to define an area for receiving and / or supporting the telescopic damper.

[0014] The lock pin may include a plurality of teeth or other complementary features for engaging with the toothed surface of the telescopic plate. At an end of the lock pin opposite the teeth, the lock pin may include a head configured to be received in an opening in the preload plate. The lock pin may include a lip adjacent to the head. The lip may have a width (e.g., maximum width) or diameter greater than the width (e.g., maximum width) or diameter of the head. The lock pin may include a body (e.g., located opposite or extending from the lip). The body may have a width (e.g., maximum width) or diameter less than the width of the lip. The lock pin may include one or more generally flat segments extending along its length. A return spring may be disposed around the body of the lock pin. The return spring may, for example, release the lock pin from the telescopic plate when the adjustment subassembly is in the unlocked position.

[0015] The user manipulation device may include a contact portion having an angled surface configured to contact the preload plate. This may result in preload and / or engagement of the locking pin and the telescopic plate when in the locked position. The preload plate may include an outer segment configured to contact a portion of the user manipulation device. The outer segment may include one or more contact features (e.g., protrusions, ridges, etc.) for contacting the portion of the user manipulation device. The preload plate may include an inner segment configured to receive at least a portion of the locking pin. The inner segment may include a pin opening for receiving the head of the locking pin. The inner and outer segments may be joined by an arcuate portion. The arcuate portion may provide flexibility to the preload plate, allowing the inner and outer segments to move relative to each other (e.g., when a force is applied or released). The outer and inner segments may be substantially parallel to each other when at rest (e.g., when no force is applied).

[0016] The assembly may include an engagement plate configured to be positioned between the column tube and the telescope plate. The telescope plate may be at least partially disposed within the engagement plate. The engagement plate and the telescope plate may have features that engage or contact each other to provide energy absorption. The telescope plate may include one or more protrusions or projections configured to be received within one or more slots of the engagement plate. The engagement plate may include one or more protrusions or projections configured to be received within one or more slots of the telescope plate. The engagement plate may include one or more slots for receiving the protrusions or projections. The telescope plate may include one or more slots for receiving the protrusions or projections. The one or more slots may have varying widths (e.g., narrow and wide portions). The engagement plate may include one or more ribs extending along at least a portion (e.g., longitudinally) of the engagement plate. The telescope plate may include one or more ribs extending along at least a portion (e.g., longitudinally) of the telescope plate. The one or more ribs can have varying widths (e.g., narrow and wide portions). Energy absorption can be achieved by friction and / or deformation. Energy absorption can be achieved by forcing one or more protrusions or projections extending from the telescoping plate and / or engagement plate through one or more small slots in the engagement plate and / or telescoping plate (e.g., slots having a width approximately equal to or smaller than the width of the protrusions or projections). Energy absorption can be achieved by forcing one or more ribs on the engagement plate and / or telescoping plate through a small width defined by two or more projections (e.g., a width between the protrusions approximately equal to or smaller than the width of the ribs).

[0017] The present teachings also contemplate a steering column assembly. The steering column assembly may include a column tube, a steering shaft rotatably supported at least in part by the column tube, a bracket for at least in part supporting the column tube and / or securing the assembly within the vehicle, and an adjustment subassembly as described herein. The adjustment subassembly may be adapted to selectively adjust the steering shaft, the column tube, or both in a fore-and-aft direction generally along a longitudinal axis, selectively raise and lower the steering shaft, the column tube, or both, or both. The telescope plate may be secured to the column housing by one or more fasteners (e.g., rivets). The telescope plate may be configured to detach from the column tube upon impact exceeding a threshold load. For example, rivets joining the column tube and the telescope plate may shear to allow detachment of the telescope plate.

[0018] In this manner, it is possible to achieve unique assemblies (and associated methods) that allow adjustment of the steering column assembly (e.g., tilt, telescope, or both), facilitate assembly, reduce the number and / or size of required parts, provide energy absorption and / or release upon impact above a threshold load, or achieve a combination thereof. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a perspective view of an exemplary steering column assembly in accordance with the present teachings. [Figure 2] FIG. 1 is a perspective view of an adjustment subassembly of a steering column assembly in accordance with the present teachings. [Figure 3] 1 illustrates components of an exemplary adjustment subassembly of a steering column assembly. [Figure 4] 1 illustrates an exemplary telescope plate in accordance with the present teachings. [Figure 5] 1 illustrates an exemplary preload plate in accordance with the present teachings. [Figure 6A] 1 illustrates an exemplary locking pin in accordance with the present teachings. [Figure 6B] 1 illustrates an exemplary locking pin in accordance with the present teachings. [Figure 7] FIG. 1 is a cross-sectional view of a portion of an exemplary adjustment subassembly of a steering column assembly including a telescope plate and an engagement plate. [Figure 8] FIG. 1 is a front view of a portion of an exemplary adjustment subassembly of a steering column assembly including a telescope plate and an engagement plate. [Figure 9A] 1 illustrates an exemplary engagement plate. [Figure 9B] 1 illustrates an exemplary engagement plate. [Figure 9C] 1 illustrates an exemplary engagement plate. [Figure 10A] 1 illustrates an exemplary telescope plate in accordance with the present teachings. [Figure 10B] 1 illustrates an exemplary telescope plate in accordance with the present teachings. [Figure 11] 1 illustrates a portion of an exemplary telescope plate in accordance with the present teachings. [Figure 12] 1 illustrates a portion of an exemplary telescope plate in accordance with the present teachings. DETAILED DESCRIPTION OF THE INVENTION

[0020] Where necessary, details of the present teachings are disclosed herein; however, it should be understood that the disclosed teachings are merely exemplary, as they may be embodied in various and alternative forms. The figures are not necessarily to scale, and some features may be exaggerated or minimized to show details of particular components. Some features may be omitted for clarity or other reasons. Therefore, specific structural and functional details disclosed herein should not be construed as limiting, but merely as a representative basis for teaching those skilled in the art how to variously use the present teachings.

[0021] In general, as will be understood from the following description, the present teachings relate to a steering column assembly. The steering column assembly can include a mounting portion for securely securing the assembly in a fixed operating position within a vehicle. The assembly can have a collapsible and / or retractable portion, at least a portion of which is configured to move forward relative to the mounting portion, while the mounting portion generally remains in its fixed operating position (e.g., any movement of the mounting portion can be controlled and / or limited to an amount of about 50 mm or less, about 20 mm or less, or about 10 mm or less). Within its basic concept, the present teachings relate to a steering column assembly that can be configured such that at least a portion of the collapsible portion moves forward within the vehicle in the event of an impact, such as a secondary impact resulting in a threshold load (e.g., a load of about 0.5 kN or more, or about 2 kN or more; a load of about 10 kN or less, or about 5 kN or less). The forward movement can be telescopic (e.g., at least one first structure (such as a column tube) operably coupled to the steering wheel can move forward within the vehicle (e.g., along an axis that is generally parallel to the vehicle longitudinal axis (e.g., within about 10° of parallelism)) relative to at least one second structure (such as a column housing) that can at least partially surround the at least one first structure).

[0022] The present teachings contemplate that a steering column assembly can include tilt or tilt adjustments adapted to allow a user to select a tilt angle for the steering wheel, telescoping adjustments adapted to allow a user to select a suitable fore-aft position for the steering wheel, or both. Generally, any such adjustments can be controlled by a suitable user-operated device (e.g., a lever, an electromechanical actuator, a motor, etc.). In the case of manually operated systems, the lever or other user-operated device can be configured to control the force applied to maintain the crush portion in a user-selected position. For example, the lever or other user-operated device can operatively engage one, two, or more mechanisms to removably (and possibly adjustably) secure two or more components of the crush portion. With regard to tilt adjustment of the assembly in particular, the securement can be achieved by a suitable securing member (e.g., an elongated force-applying member), such as a bolt (e.g., a tilt bolt), a rod, a strap, a bar, a band, a wedge, a cam, or other suitable member, or a combination thereof. For example, the locking member can be configured to rotate a cam or rotating member and engage a wall of the tilt plate to lock the steering wheel in its desired position upon actuation of the user controlled device. Upon actuation of the user controlled device, the pin can be disengaged or engaged with one or more engagement features (e.g., a toothed portion, a shape complementary to the pin, or one or more openings) located on or attached to the column tube to allow for telescopic adjustment.

[0023] The present teachings also generally contemplate the use of one or more energy absorbing devices. The energy absorbing device can be any suitable device configured to elastically deform and / or elastically and plastically deform. Thus, during the deformation process, the energy absorbing device is configured to absorb energy through deformation. The energy absorbing device may be operably coupled or disposed between two or more components. It can be configured to limit relative movement, such as between two or more components. The energy absorbing device can be a wire, plate, strip, or the like. They can have a constant or varying profile along their length. They can be used to have one or more fixedly constrained portions (e.g., ends). They can have one or more free ends.

[0024] In the event of an impact above a threshold load, one or more elements may break away from another element in the assembly, thereby providing energy absorption or control. For example, a plate secured to a column tube may become detached or disengaged from the column tube upon impact above a threshold load. Fasteners joining components, such as rivets, may shear, thereby allowing separation. Energy absorption or control may be provided by elements of the assembly that interengage. For example, a telescoping plate may have one or more features that engage with one or more features of an engaging plate.

[0025] In the illustrated example, the teachings describe embodiments useful for an internally collapsed steering column assembly for an automobile. Generally, the assembly of the teachings herein can include a steering shaft (e.g., which can be coupled to a steering wheel or other steering device) and / or a column tube supporting the steering shaft (e.g., using one or more bearings). A column housing can be used, which can be configured to telescopically couple with the column tube (e.g., each can have longitudinal axes that are generally parallel or even coaxial with one another). One or more brackets can be used to at least partially secure one or both of the column tube or the column housing to the vehicle (e.g., to the vehicle's cross structure). The brackets or one or more tilt plates can include appropriate portions (e.g., slots, such as generally vertically oriented slots) configured to provide a guide structure for the tilt function. A user-operated device, such as a lever, can be used to allow a user to manually operate and / or adjust the assembly. An electromechanical device can be used that applies or releases force in response to a signal from an operating switch. The steering column assembly can be configured to allow at least a portion of the assembly (e.g., the column tube, the steering shaft, the steering wheel, or a combination thereof) to translate forward from a typical operating position when a threshold load is applied during an impact, such as a secondary impact. Thus, the column tube can translate forward relative to the column housing while supporting the attached steering wheel. As a result, it can be seen that the steering wheel can translate forward, for example, away from the user.

[0026] The present teachings typically address an assembly that may include a column tube, a steering shaft, a bracket, a column housing, and a steering wheel adjustment subassembly (e.g., a manually operated steering wheel adjustment subassembly). The steering wheel adjustment subassembly may include a lever (such as the above or other user-operated devices) configured to actuate (e.g., manually actuate) the subassembly by tilting, telescoping, or both. One or more motors may be used instead of or in addition to manual actuation by a lever. For example, one or more motors or other electromechanical actuators may effect tilt, telescoping, or both. It is further contemplated that a lever may be used to effect either the tilt function or the telescopic function, while a motor or other electromechanical actuator may be used to effect the other of the tilt function or the telescopic function. At least one engagement member (e.g., a pin) may be engaged and disengaged with the column tube or a structure secured thereto to selectively lock (e.g., with a lever) the steering shaft in a user-desired position (e.g., a telescopic position). To adjust the user's desired tilt position (e.g., with a lever), one or more rotating members can be engaged and disengaged (e.g., by interference) with walls of the tilt plate that define the vertical slot. During an impact, such as a secondary impact, the column housing remains in a generally fixed position relative to the forward pivot mounting location (e.g., any forward translation is limited to a relatively small amount, e.g., about 20 mm or less, or about 10 mm or less).

[0027] The assemblies described herein will generally include a tube operatively coupled to a steering wheel (not shown), for example, via a steering shaft. One such tube, referred to herein as a column tube, will typically have a hollow cavity along at least a portion (if not all) of its length and may be sized and configured to receive and support a rotatable shaft, i.e., a steering shaft, and possibly one or more bearings. Both the shaft and the tube will have a longitudinal axis. When installed in a vehicle, the longitudinal axis of each shaft and tube (and the steering column assembly generally) may be generally coaxially aligned with, generally parallel to, or both with the longitudinal axis of the vehicle. The shaft and column tube may be made of or otherwise include a suitable metal, such as one or more of iron (e.g., steel), magnesium, zinc, or aluminum.

[0028] The column tube may be generally cylindrical and hollow. It may have forward and rearward ends and a longitudinal axis. One or both of the forward and rearward ends may include suitable bearings for rotationally supporting the steering shaft.

[0029] The steering shaft can have a rear end configured to receive a steering wheel (not shown). The steering shaft can have a front end that can pass through and be supported by a bearing, a key lock collar, or both. As noted above, the steering shaft can be rotationally supported at least in part by the column tube and can have a longitudinal axis that is generally coaxially aligned with the longitudinal axis of the column tube.

[0030] One or more suitable brackets may be used. Any such bracket may include a portion for mounting the steering column assembly within the vehicle (e.g., it may be secured to a vehicle structure such as a vehicle cross beam, instrument panel, etc.). The bracket may have a portion that is at least partially adjacent to the steering shaft support structure (e.g., a column tube, a column housing, or both). For example, the bracket may include or be coupled to one or more downwardly depending (downwardly facing) walls (e.g., tilt plates) that define a tilt portion of the bracket. One or more of the downwardly depending walls (e.g., tilt plates) may be configured to provide a structure with elongated slots that allow guidance for the tilt function (e.g., this may provide a guide path for a securing member such as a tilt bolt as it moves during adjustment, thus limiting upward and downward movement). The bracket may be of one-piece construction (e.g., cast, compression molded, or a combination thereof) such that the tilt portion and mounting portion are a single structure. The bracket may be made of separate structures that are assembled together to define the mounting and tilt portions of a single structure. The mounting portion can be omitted and / or located elsewhere in the steering column assembly. The tilt portion can be omitted. A mounting bracket can be used separate from the structure that defines the tilt portion. In addition to the examples described herein, examples of brackets that can be used include U.S. Publication No. 2010 / 0300238 (the entire disclosure of which is incorporated by reference for all purposes; see, e.g., the description of bracket 20), U.S. Patent No. 6,467,807 (the entire disclosure of which is incorporated by reference for all purposes; see, e.g., the description of brackets 6 and 7 and related structures).

[0031] One or more brackets (e.g., tilt brackets), tilt plates, or combinations thereof may be used and adapted to receive at least a portion of the steering shaft support structure (e.g., at least a portion of the column tube, the column housing, or both) and / or to mount the steering column assembly within the vehicle. Illustratively, tilt brackets of the present teachings may include an upper portion configured to be secured to a vehicle structure such as a vehicle cross beam, an instrument panel, or the like. The bracket (e.g., tilt bracket) may have a pair of generally opposing, downwardly facing, or protruding walls (e.g., tilt plates). The bracket (e.g., tilt bracket) may have a structure that at least partially flanks at least a portion of the steering shaft support structure (e.g., column tube), or may be directly or indirectly joined to one or more plates located on such a flank. The bracket (e.g., tilt bracket) may include or be directly or indirectly joined to a pair of opposing side walls, a top wall configured to mount to the vehicle (e.g., to the vehicle cross beam, instrument panel, or other suitable structure), or a combination thereof. The side walls can project outwardly relative to the top wall (e.g., can be disposed generally perpendicular or diagonally relative to the top wall). The bracket (e.g., tilt bracket) can have a single downwardly projecting or oriented wall. The bracket (e.g., tilt bracket) can be disposed laterally upward and outward relative to opposing portions of the column housing.

[0032] The teachings herein can be utilized in steering column assemblies that are not adjustable but still require a collapse function. In such cases, there would be no tilt or telescoping adjustment hardware. However, the concepts herein can still be adapted to achieve collapse. A mounting bracket can secure either the column housing or the column tube, or both, to the vehicle. An energy absorption device can be utilized to limit forward movement of one or more components of the steering column assembly, such as the column tube, the steering shaft, or both.

[0033] However, the present teachings are particularly applicable to adjustable (e.g., tilt and / or telescopic) steering column assemblies. The assembly can include a manually operated steering wheel adjustment subassembly adapted to selectively adjust the steering shaft in a fore-aft direction generally along the longitudinal axis, to selectively raise and lower the steering shaft, or both. The steering wheel adjustment subassembly can include a lever or other feature adapted for manually actuating the subassembly. The subassembly can include at least one engagement member (e.g., a pin such as a locking pin) that is engaged and disengaged with the column tube or structure secured thereto (e.g., a telescope plate) to selectively lock the steering shaft in a user-desired position (e.g., a fore-aft position). The subassembly can use other suitable hardware, such as one or more thrust bearings, one or more nuts, one or more cam fixing elements, and / or one or more cam moving elements (e.g., the cam fixing element and the cam moving element are in opposing operative relationship with each other, e.g., by contacting each other). The subassembly may also include one or more spacers or dampers, as described further herein.

[0034] The column housing can be pivotally mounted (e.g., permanently fixed) to a pivot mounting location within the vehicle. The pivot mounting location can be, for example, about 20, about 30, about 40, or about 50 mm from the front end of the column housing, or within a range thereof. The pivot mounting location can be below the column housing, above the column housing, or somewhere in between. The column housing can at least partially surround the column tube. The column housing can have one or more protrusions or other structure to receive a biasing device (e.g., a spring) that couples the column housing with the tilt bracket. The column housing can be of cast construction (e.g., including metals such as aluminum, magnesium, zinc, and / or iron (e.g., steel)). During a secondary impact, the column housing can remain in a substantially constant position relative to the pivot mounting location. The column housing can be fixed to translate forward a relatively small amount (e.g., about 50 mm or less, about 20 mm or less, or about 10 mm or less).

[0035] The structure of the present teachings can be configured to include a suitable combination of elements arranged in such a manner that, upon impact (such as a secondary impact), the column tube, the steering shaft, or both, can translate longitudinally forward relative to the column housing.

[0036] The assemblies herein may further employ energy absorbing structures of the type described in U.S. Patent Application Publication No. 2013 / 0233117, the entire disclosure of which is incorporated herein by reference for all purposes. For example, the assemblies herein may include at least one plastically deformable energy absorbing device (e.g., a bent plate, wire, or some other structure configured to be at least partially supported by the column housing), which, when used, absorbs energy by plastic deformation during a secondary impact after the steering shaft support structure (e.g., the column tube and steering shaft) begins to translate along the column housing. Thus, any plastically deformable energy absorbing device may limit the range of longitudinal movement of the column tube, the steering shaft, or both.

[0037] The present teachings contemplate an adjustment subassembly. The adjustment subassembly can include a tilt adjustment assembly, a telescope adjustment assembly, or both. One or more components of the adjustment subassembly can act to provide or facilitate both tilt and telescope adjustment. For example, actuation of a user-operated device, such as a lever, can lock and / or unlock both the telescope adjustment assembly and the tilt adjustment assembly.

[0038] The assembly herein includes a tilt adjustment assembly. The assembly may include two or more tilt plates extending downwardly from opposite sides of the column tube, the column housing, or both. The tilt plates may include one or more generally vertical slots. A tilt bolt or other elongated fastener may extend between the two tilt plates, and the tilt bolt may be received in the vertical slot. Height adjustment of the assembly is achieved by moving the tilt bolt up or down within the slot when a user-operated device, such as a lever, is in an unlocked position. Moving the user-operated device, such as a lever, to a locked position may hold the assembly at a desired angle or height.

[0039] To lock the assembly at a desired height or angle relative to the driver, a user-operated device such as a lever can operate a locking system, such as a cam locking system. A rotating member can be positioned within one or both of the opposing tilt plate vertical slots in the tilt adjustment assembly. The rotating member can be, for example, generally oval or teardrop shaped. The rotating member can engage walls defining the tilt plate slots (e.g., via teeth) when the lever or other user-operated device is in the locked position. A spring can be attached to the rotating member by being keyed to the tilt bolt so that when the lever is in the locked position, the spring compresses or rotates the rotating member so that the teeth contact the tilt plate (e.g., the walls defining the slots). The shape of the rotating member allows the rotating member to disengage from the walls defining the tilt plate slots (and the teeth to move away from their surfaces) when the lever is in the unlocked position, allowing the rotating member and tilt bolt to move freely up or down within the slots to allow the driver or user to adjust the height and angle of the steering wheel.

[0040] The present teachings also contemplate telescopic adjustment assemblies. Features of the telescopic adjustment assembly can also serve to absorb and / or dissipate energy during an impact, such as a secondary impact. Features of the telescopic adjustment assembly, particularly features that serve to absorb or dissipate energy during an impact, are also useful in other positive lock assemblies or non-positive lock assemblies. Such uses are also within the scope of the present teachings. While these features are advantageous in the exemplary positive lock structures as described herein, the present teachings are not limited to use solely with positive lock structures as described herein.

[0041] The telescope adjustment assembly may include a telescope plate. The telescope plate may be configured to be secured to another portion of the steering column assembly, such as the column tube, the column housing, or both. The telescope plate may function to provide an engagement area that allows for locking of the telescope adjustment assembly. The telescope plate may include one or more features for securing the telescope plate to another portion of the steering column assembly. The telescope plate may include one or more openings for receiving fasteners (such as rivets, pins, screws, bolts, etc.), one or more protrusions or fasteners (e.g., integral fasteners) that are received within openings elsewhere in the assembly (e.g., openings in the column tube), or both.

[0042] The telescope plate can be generally flat. The telescope plate can have one or more segments or surfaces that are generally flat (e.g., a surface facing away from the element to which it is secured, such as a surface facing away from the column tube). The telescope plate, or a portion thereof or a surface thereof, can have a shape that generally matches or closely matches the shape of an element in an assembly to which it is attached. For example, the telescope plate can include a surface with some curvature to limit or prevent rocking of the plate on the outer diameter of the column tube to which it is attached.

[0043] The telescope plate may include one or more features to support the telescope damper. The telescope plate may include a portion with a curved profile to define an area that can support the telescope damper. The telescope plate may include one or more outwardly extending protrusions (e.g., forming a T-shape) to secure or engage the telescope damper. The telescope damper may be used as a stop within the telescope assembly to prevent excessive fore-and-aft translation of the column tube. The telescope damper may be formed of an elastomeric or resilient material to provide a soft stop.

[0044] The telescoping plate can include one or more features for engaging with another portion of the assembly. The engagement can provide energy absorption, such as upon impact above a threshold load. The one or more features can frictionally engage with another element of the assembly. The one or more features can deform during impact above a threshold load to absorb energy.

[0045] The one or more engagement features may include one or more protrusions or projections. The protrusions or projections may be generally rigid. The protrusions or projections may be formed of a generally rigid material, such as a metallic material (e.g., steel). The protrusions or projections may be capable of withstanding forces applied thereto upon an impact exceeding a threshold load (e.g., during a secondary impact). The protrusions or projections may be received within another element of the assembly, such as an engagement plate. The protrusions or projections may extend from any portion of the telescope plate. For example, the one or more projections may extend from a surface of the telescope plate toward the column tube. The one or more projections may extend from an edge of the telescope plate. The one or more projections may extend generally laterally from the telescope plate. The one or more projections may extend from an edge of the plate and bend or curve toward another element of the assembly, such as the column tube.

[0046] The assembly may include an engagement plate. The engagement plate may function to support, accommodate, and / or engage the telescopic plate. The telescopic plate may be at least partially disposed within the engagement plate. The engagement plate may be a deformable component. For example, such deformation may occur upon impact exceeding a threshold load. The engagement plate may be formed of a deformable material, such as a plastic material. The engagement plate may be located between the column tube and the telescopic plate.

[0047] The engagement plate may include one or more features for securing the engagement plate, the telescoping plate, or both to the column tube. The features may hold the engagement plate, the telescoping plate, or both in place during operation of the steering column assembly. The features may prevent the engagement plate, the telescoping plate, or both from rocking during operation. The surface of the engagement plate that contacts the column tube may be generally curved or may have a shape complementary to the surface to which it is attached. Such a shape may limit or prevent rocking of the engagement plate, the telescoping plate, or both. The engagement plate may have one or more openings for receiving fasteners. The openings may be generally aligned with the openings in the telescoping plate, such that a single fastener can pass through both openings to secure an element within the steering column assembly (e.g., to the column tube). The engagement plate may include one or more attachment features, such as protrusions, engagement members, hooks, tongues, etc., for engaging with the openings in the column tube. Upon impact, the rivet can shear and the attachment feature can act to maintain the position of the engagement plate on the column tube. As the column tube translates forward, the engagement plate can also translate forward. The breakaway load can be adjustable separately from the energy absorption load.

[0048] The engagement plate may include one or more features to retain the telescoping plate. The retention features may prevent the parts from separating or from excessive deformation in a direction perpendicular to the steering column shaft axis. For example, the engagement plate may include a lip on one or more edges. The lip may extend along all or part of the length of the engagement plate. The edge of the engagement plate may include multiple lip segments. The lip may act to surround the edge of the telescoping plate, thereby acting to limit or eliminate rattle, rocking, separation of the parts in a direction perpendicular to the steering column shaft axis, or a combination thereof.

[0049] The engagement plate can include one or more features for engaging with the telescoping plate. Engagement can be possible during normal operation, during adjustment of the steering column assembly, or both. Engagement can be possible during an impact above a threshold load. The feature on the engagement plate can engage with a portion of the telescoping plate. During an impact above a threshold load, either the engagement plate or the telescoping plate can remain substantially fixed while the other translates forward. The translational engagement of one or more of the plates can act to absorb energy during an impact.

[0050] For example, the engagement plate can include one or more slots. A protrusion of the telescoping plate can be received within the slot. The slot can have a varying width. The slot can have a wide portion and a narrow portion. During normal operation, the protrusion of the telescoping plate can be received within the wide portion of the slot. During an impact above a threshold load, the protrusion of the telescoping plate can be forced into the narrow portion of the slot. The width of the protrusion can be approximately equal to or generally greater than the width of the narrow portion of the slot. Contact between the protrusion and the engagement plate can result in energy absorption. For example, energy absorption can occur due to friction between the protrusion of the telescoping plate and the walls defining the slot. Energy absorption can occur due to deformation of the engagement plate, the telescoping plate (e.g., the protrusion), or both.

[0051] The engagement plate may include one or more ribs. The ribs may extend between two or more slots. The ribs may extend from the body of the engagement plate. The ribs may extend along a longitudinal axis of the engagement plate. The ribs may have a width with a varying thickness. The ribs may have a wide portion and a narrow portion. The wide portion of the rib may be located approximately adjacent to the narrow portion of the slot. The narrow portion of the rib may be located approximately adjacent to the wide portion of the slot. During normal operation, the narrow portion of the rib may be received between two protrusions extending from the telescopic plate. During an impact exceeding a threshold load, the wide portion of the rib may be compressed between the protrusions of the telescopic plate. The distance between the protrusions of the telescopic plate may be approximately equal to or less than the width of the wide portion of the rib. Contact between the ribs and the protrusions may provide energy absorption. For example, energy absorption may occur through friction between the ribs and the protrusions of the telescopic plate. Energy absorption can occur through deformation of the engagement plate, the telescoping plate (eg, protrusions), or both.

[0052] It is also contemplated that the telescoping plate can include one or more ribs and / or slots. The engagement plate can have one or more protrusions or projections. Such functions or interactions between engagement features are similar or the same as those described above in the reverse configuration. It is also contemplated that the telescoping plate can have a combination of ribs, slots, protrusions, and projections. The engagement plate can have a combination of ribs, slots, protrusions, and projections. Each combination can be positioned to allow engagement between the features.

[0053] The arrangement of the telescoping plate and engagement plate allows the energy absorbing mechanism to be packaged in a relatively small space.

[0054] The portion of the telescope plate that faces away from the column tube (or other element to which it is attached) can engage a fastener or pin, such as a spring-loaded locking pin. This locking pin can be actuated by a user-operated device, such as a lever, on the steering column assembly. For engagement with the locking pin, the telescope plate can include a friction surface, such as a toothed or textured surface. The telescope plate can include a stepped surface. The telescope plate can include a surface that is generally complementary in shape to the portion of the locking pin it engages to enable locking engagement between the structures. The telescope plate can include one or more openings to receive a portion of the locking pin.

[0055] The adjustment subassembly can include a locking pin or other member configured to engage with the telescope plate to provide a locking engagement (e.g., locking after telescope adjustment). The locking pin can engage and disengage with the telescope plate depending on whether the assembly is in a locked or unlocked position. For example, the locking pin can be pushed toward the telescope plate when the lever is locked, and lifted away from the telescope plate when the lever is unlocked to allow for smooth telescope adjustment. The locking pin can be in a generally perpendicular relationship to the longitudinal axis of the column tube, a generally perpendicular relationship to the longitudinal axis of the telescope plate, or both.

[0056] The locking pin can have one or more features that allow it to engage and / or contact one or more other elements of the assembly. At or near the end of the locking pin can be a plurality of teeth or other engagement features that engage with the telescopic plate. Other engagement features can include a textured surface, a stepped surface, a surface complementary to the surface of the telescopic plate it contacts, an extension that is received within an opening, etc., or a combination thereof.

[0057] The opposite end of the locking pin can be a head that can be received in another part of the assembly, such as a preload plate, where the head of the locking pin can extend toward the lever of the adjustment subassembly, away from the column tube, or both.

[0058] The lock pin can include a body portion. The body portion can serve to provide an area around which a spring (e.g., a return spring) can be placed. The body portion can provide length to the lock pin (e.g., to make the lock pin as long as necessary to serve its intended purpose). The body portion can serve to join an engagement feature (e.g., a tooth) to another portion of the lock pin (e.g., a lip).

[0059] The locking pin can include a lip. The lip can have a diameter or maximum width greater than the diameter or maximum width of the head, the body, or both. The lip can provide one or more surfaces against which pressure can be applied when in the locked position, the unlocked position, or both, allowing the locking pin to engage or disengage from the telescoping plate. A preload plate can rest on the lip of the locking pin when the head of the locking pin is received therein. The preload plate can press or preload the locking pin toward the telescoping plate by contacting the lip. When in the unlocked position, a spring (e.g., a return spring) located around the body of the locking pin can contact the lip on the opposite side to lift the locking pin away from the telescoping plate, allowing for smooth telescoping.

[0060] The lock pin can have a generally circular cross-section. The lock pin can have a generally round cross-section. The lock pin can have one or more portions whose cross-section includes one or more flat regions (e.g., D-shaped). The lock pin can include one or more generally flat surfaces extending along at least a portion of its length. The generally flat surfaces can extend along the entire length of the lock pin. The generally flat surfaces can limit or eliminate rotation of the lock pin within the assembly to ensure proper alignment between the lock pin and the telescopic plate, e.g., teeth on the lock pin and a toothed surface on the telescopic plate.

[0061] The adjustment subassembly can include a preload plate. The preload plate can act as a spring and preload the locking pin against the telescoping plate (e.g., in the case of tooth-to-tooth engagement). The preload plate can include a portion that receives a portion of the locking pin. For example, the preload plate can include a pin opening to receive the head of the locking pin. The preload plate can include a portion that contacts a contact portion of a user-operated device, such as a lever.

[0062] The preload plate can include an outer segment. The preload plate can include an inner segment. The preload plate can include an arcuate portion joining the inner and outer segments. The arcuate portion can provide the preload plate with a certain flexibility, allowing it to flex or act as a spring. The inner and outer segments can be generally parallel to each other when at rest or when no force is acting thereon. The flexibility of the arcuate portion can be used to bias the inner and outer segments toward each other (e.g., at an angle rather than a parallel relationship) upon application of a predetermined force or pressure. The preload plate can have a generally C-shape.

[0063] The outer segment can include one or more contact features for contacting a portion of a user-operated device, such as a lever. For example, the outer segment can include one or more ridges, protrusions, etc. for contacting a contact when in the locked position, the unlocked position, or both.

[0064] The inner segment can include a pin opening to receive the head of the lock pin. The pin opening can have a shape that generally matches the shape of the head of the lock pin to limit rotation or movement therein. This can be further achieved by the presence of one or more tabs in the opening. The tabs can extend toward the outer segment and contact the head of the lock pin to further hold the lock pin in place (e.g., by friction, preventing rocking or rotation, or both).

[0065] For telescopic adjustment, the portion of the telescopic plate facing outward from the column tube can engage with a spring-loaded fastener, such as a locking pin, that can be activated by a lever on the steering column assembly. The fastener can be inserted through an opening in the column housing, the tilt plate, or both. The fastener can be positioned generally perpendicular to the column tube. When a fastener, such as a spring-loaded fastener, is pressed or pressure is applied (i.e., when the spring is compressed), the tip of the fastener can engage with the telescopic plate. For example, if the telescopic plate includes a toothed surface, the teeth can engage with the toothed end of the locking pin to provide a locking engagement and prevent further fore-aft movement of the column tube. Pressurization or compression of the spring-loaded fastener can be provided by a portion of a lever or other user-operated device. Pressure can be applied to the preload plate, which is distributed to the locking pin. In this manner, the lever or other user-operated device also allows a user or driver to control the fore-aft telescopic adjustment of the steering column assembly. The lever can include a ramp or angled segment that faces the column tube and / or column housing. When the lever is in the locked position, the ramp can contact a preload plate (e.g., at a contact feature) or the head of a spring-loaded fastener, such as a locking pin, thereby forcing the pin toward the column tube. When the lever is in the unlocked position, the spring-loaded fastener can be released, and as the spring returns to its uncompressed state, the tip or end of the fastener is no longer engaged with the telescope plate (e.g., a toothed surface), allowing the user to freely pull or push the steering wheel to adjust its position. Similarly, if the portion of the telescope plate facing away from the column tube includes a series of holes or openings, the fasteners can have a corresponding shape to fit snugly into the holes or openings. Alternatively, the telescope plate can include slots or gaps that can receive the fasteners.The fastener can have an oval cross-section so that in one position the fastener can move freely within a slot or gap and when rotated can prevent further movement (e.g., similar to the rotating member and slot described with respect to tilt adjustment herein).

[0066] In other words, as a summary of the general teachings herein (and without limitation), in general terms, the present teachings relate to an adjustable steering column assembly. The assembly includes a steering shaft support structure. For example, it can include a column housing, which can have one or more of the features described in the present teachings. The assembly can include a column tube, which can have one or more of the features described in the present teachings and can accommodate telescopic adjustment within the column housing. The column tube can simply be a tube or other suitable hollow structure (e.g., the single-manufactured unit monolithic structure described above) for receiving the steering shaft. The steering shaft (which can have one or more of the features described in the present teachings and can partially support a steering wheel attached thereto and can be part of an assembly, if desired) is rotationally supported (e.g., by one or more bearings) at least partially by the steering shaft support structure and can have a longitudinal axis. A bracket, which can have one or more of the features described in the present teachings, can be used to at least partially support the steering shaft support structure and / or mount the assembly within the vehicle (e.g., to the vehicle cross structure). For example, as described above, the bracket can include a portion that provides a guide structure along one or more downwardly projecting walls to allow tilt adjustment. At least one fastening member, which can have one or more of the features described in the present teachings (e.g., a tilt bolt in the case of a tilt-adjustable steering column assembly), can be used to fix the position of the steering shaft support structure relative to the bracket. For example, the at least one fastening member can be operably coupled to an actuator or other user-operated device (such as a lever or electromagnetic actuator). The at least one fastening member can be operated to apply a force (e.g., a clamping force) (or create an interference fit) that helps secure the steering shaft support structure in a fixed position.The assembly can allow at least a portion of the steering shaft support structure to translate forward (e.g., in a crush stroke) upon application of a threshold load. The threshold load can be a load of about 0.5 kN or greater, or about 2 kN or greater. The threshold load can be a load of about 10 kN or less, or about 5 kN or less. The threshold load can be based on customer-specified load requirements, which are typically about 2 kN to about 5 kN. One or more energy absorbing devices can also be employed that can operate to absorb energy in response to an applied force, at least in part, due to forward translation of the steering shaft support structure. For example, a bent plate, wire, or the like can be operably engaged with at least one fixed member and / or the steering shaft support structure such that energy is absorbed by plastic deformation of the energy absorbing device. The steering shaft support structure (e.g., a column tube to which the energy absorbing device is attached) can move forward, deforming (e.g., plastically) the energy absorbing device such that energy from an impact is absorbed by the deformation.

[0067] Referring to the drawings, FIG. 1 shows a steering column assembly 10 having a forward end 12 and a rearward end 14. A column housing 18 is pivotally mounted to the vehicle via a bracket 16, although other configurations and mounting brackets are contemplated. The steering column assembly 10 includes a steering shaft 22 at the rearward end 14, which is configured to support a steering wheel (not shown). The steering shaft 22 is supported by a column tube 20, both of which are supported by the column housing 18. The column tube 20 is movable relative to the column housing 18, particularly in the fore-and-aft direction for telescopic adjustment. The steering shaft 22 and column tube 20 are also configured to be adjusted upwardly or downwardly relative to the driver by a tilt assembly that includes two parallel, downwardly depending tilt plates 24 that support and engage tilt bolts 26 (see FIG. 2). Adjustment of the steering shaft 22 and column tube 20 in a tilt and / or telescope manner can be initiated by manipulating a lever 32, which engages and / or disengages or locks and / or unlocks the adjustment mechanism to allow the driver to position the steering wheel as desired.

[0068] FIG. 2 shows the adjustment subassembly 30. For clarity, the column housing is not shown. The position of the column tube 20 can be adjusted upward and downward relative to the vehicle driver or user via a tilt assembly that includes a tilt bolt 26 supported at each end by opposing tilt plates 24, each having a generally vertically oriented slot 28 for receiving the tilt bolt 26 and, optionally, one or more locking members (e.g., cams or rotating members). The angle of the column tube 20 can be manually adjusted by unlocking a lever 32 and moving a steering wheel (not shown) to the desired height or tilt. The tilt bolt 26 can move along the slot 28 during tilt adjustment and can be locked in place by locking the lever 32.

[0069] In the locked and unlocked states of the lever 32, it causes a contact portion 34 of the lever to contact the preload plate 50. The contact portion 34 may have a sloped or angled surface that applies pressure to the preload plate 50 in the locked state and releases or applies less pressure to the preload plate in the unlocked position. The preload plate 50 engages a locking pin 70. When the lever 32 is in the locked position, the locking pin 70 is forced toward the telescope plate 40, which is attached to the column housing 20 via one or more fasteners 43, such as rivets. The locking pin 70 engages the telescope plate, for example, at a toothed surface 44 of the telescope plate 40. When the lever 32 is in the unlocked position, a return spring 36 pushes the locking pin 70 away from the telescope plate 40, thereby causing a disengagement between the locking pin 70 and the telescope plate 40.

[0070] FIG. 3 shows the components of the adjustment subassembly of FIG. 2. For clarity, the lever 32 has been omitted. As shown, this assembly includes a preload plate 50 that engages or receives a portion of the locking pin 70. A return spring 36 is positioned around a portion of the locking pin 70 and rests against a lip 74 of the locking pin 70, lifting the locking pin away from the telescope plate 40 when the lever is unlocked for smooth telescoping movement. The preload plate 50 is on the opposite side of the lip 74 of the locking pin 70 and engages the locking pin with the telescope plate 40 when the lever is in the locked position. The locking pin 70 includes a plurality of teeth 78 that engage the toothed surface 44 of the telescope plate 40. The telescope plate 40 is configured to be secured to the column tube (see FIG. 2) via one or more fasteners 43, such as rivets. One end of the telescope plate 40 includes a damper 49, which can function as a telescope stop.

[0071] FIG. 4 shows an exemplary telescope plate 40. The telescope plate 40 includes one or more (two shown) fastener openings 42 for receiving fasteners such as rivets to secure the telescope plate to the column tube 20 (see FIG. 2). The telescope plate 40 includes a toothed surface 44 extending across at least a portion of the plate for engaging with teeth 78 on a locking pin 70 (see FIGS. 6A and 6B). The telescope plate 40 includes a curved portion 46 at one end configured to support a damper 49 (see FIG. 3). The telescope plate 40 also includes one or more damper engagement features 48, shown here as T-shaped ends.

[0072] FIG. 5 illustrates an exemplary preload plate 50. Preload plate 50 includes an outer segment 52 and an inner segment 54 connected by an arcuate portion 56. Outer segment 52 includes a contact feature 58, illustrated as a ridge or protrusion from the surface of the outer segment, configured to contact contact portion 34 of lever 32 (see FIG. 2). Inner segment 54 includes a pin opening 60 for receiving head 72 of locking pin 70 (see FIGS. 6A and 6B). Pin opening 60 may have one or more tabs 62 extending toward outer segment 52 to further stabilize and / or secure the locking pin within the assembly.

[0073] 6A and 6B illustrate an exemplary locking pin 70. The locking pin 70 includes a head 72 configured to be received within the pin opening 60 of the preload plate 50 (see FIG. 5). The locking pin includes a lip 74 configured to contact and / or hold the return spring 36 (see FIG. 3) in a desired position. The opposite side of the lip 74 is configured to contact the preload plate 50 (see FIG. 3). Engagement of the return spring 36 with the lip 74 can disengage the locking pin 70 from the toothed surface 44 of the telescoping plate 40 (see FIGS. 3 and 4), allowing for telescopic adjustment of the assembly. Contact between the lip 74 and the preload plate 50 can force the locking pin toward the toothed surface of the telescoping plate 40, allowing for locking of the assembly. The locking pin further includes a body 76 around which a return spring can be disposed. At the opposite end from the head 72 are a plurality of teeth 78 for engaging the toothed surface 44 of the telescoping plate 40. The locking pin 70 may include one or more generally flat or planar surfaces 80, which are shown as being generally perpendicular to the flat surface of the head 72 of the locking pin 70, although other configurations or angular relationships are possible. The generally flat surface may extend continuously along the entire length of the locking pin, as shown, or may cover only a portion of the locking pin. The generally flat surface may reduce or prevent rotation of the locking pin within the assembly (e.g., to ensure proper alignment of the locking pin's teeth with the toothed surface of the telescoping plate), allow the locking pin to engage other features within the assembly (e.g., a preload plate), or both.

[0074] 7 and 8 show an exemplary assembly in which the telescoping plate 40 is disposed within an engagement plate 90, whereby the engagement plate 90 is positioned between the column tube 20 and the telescoping plate 40. The engagement plate 90 includes fastener openings 92 that are generally aligned with the fastener openings 42 in the telescoping plate 40 so that fasteners 43, such as rivets, can couple both plates to the column tube 20. The engagement plate includes additional attachment features 94, shown here extending through openings in the column tube, for further attachment to the column tube. During an impact, the rivets can shear and the attachment features can act to maintain the position of the engagement plate on the column tube. When the column tube translates forward, the engagement plate can also translate forward.

[0075] Although it is not necessary for the steering column assembly to be a positive locking type, FIG. 7 shows an exemplary locking pin 70 that extends through the column housing 18.

[0076] 8 shows an engagement plate 90 having two slots 96. Each slot 96 receives a protrusion 41 of the telescoping plate 40. The engagement plate 90 also includes a rib 100 located between the slots 96. The rib 100 is positioned between the protrusions 41 of the telescoping plate 40.

[0077] It is also contemplated that the engagement plate may have one or more protrusions and the telescoping plate may include one or more slots and / or ribs.

[0078] Figures 9A, 9B, and 9C show an exemplary engagement plate 90. The engagement plate 90 includes fastener openings 92 and mounting features 94 for securing the engagement plate to the column tube of the steering column assembly. Figure 9B is a close-up view of the end of the engagement plate, showing two slots 96, each having a wide portion 97 and a narrow portion 98. The engagement plate also includes a rib 100 having a wide portion 102 and a narrow portion 104. Figure 9C shows a number of retention features 106 for limiting or preventing separation of the engagement plate and telescoping plate.

[0079] 10A and 10B show an exemplary telescoping plate 40 having protrusions 41 that extend from the surface of the telescoping plate toward the engagement plate and column tube when assembled. Such protrusions can be received within slots in the engagement plate, located opposite ribs on the engagement plate, or both.

[0080] FIG. 11 shows an exemplary telescoping plate 40 having protrusions 41 extending outward from the edges of the telescoping plate 40 for engaging notches in the engagement plate 90 .

[0081] 12 shows an exemplary telescoping plate 40 having a protrusion 41 extending from the edge of the telescoping plate 40 toward the column tube (not shown). The protrusion 41 can be configured to contact the engagement plate 90. For example, the protrusion 41 can contact the edge of the engagement plate, particularly during an impact above a threshold load. The contact between the rigid protrusion and the engagement plate 90 can provide energy absorption.

[0082] While exemplary embodiments have been described above, it is not intended that these embodiments describe all possible forms of the present invention. Rather, the terms used herein are terms of description rather than limitation, and it is understood that various modifications are possible without departing from the spirit and scope of the present invention. Furthermore, features of various embodiments can be combined to form further embodiments of the present invention.

[0083] As will be appreciated, variations on the above teachings can be used. For example, a steering wheel adjustment subassembly can be made from multiple subassemblies. Rather than the toothed end of the pin engaging the toothed portion of the telescope plate, it is contemplated that the pin (which may be toothless) could be inserted into one of a series of openings along the length of the first generally flat portion. It is also contemplated that the toothed slot could be located elsewhere within the assembly. For example, instead of or in addition to a cam or rotating member located within the tilt plate slot, the slot could be defined by a toothed opening that engages with a spring or toothed cam or rotating member. While the teachings herein refer to secondary impact events as initiating some of their functional aspects, the present teachings are not limited solely to secondary impact events. Rather, when referring to a secondary impact, unless otherwise limited, the present teachings should be considered to contemplate other impacts or situations in which translation of the column tube is desirable to substantially reduce loads that would otherwise be transmitted to the vehicle operator when encountering a threshold load (e.g., in the forward direction of the vehicle) that substantially exceeds normal operating loads.

[0084] In general, the teachings herein contemplate steering column assemblies that utilize a column housing with a column tube. The teachings are not limited to just such assemblies. The teachings also generally apply to other types of steering column assemblies. For example, without limitation, the teachings are contemplated for use with steering column assemblies typically known as translating column type assemblies. Such assemblies can integrate the column housing with the column tube. Such integration can be in the form of a single manufactured unit (e.g., a casting). This unit can be mounted within the vehicle. It can be attached using one or more pins in one or more slots. An energy absorption unit can also be used. During a secondary impact, the unit can move forward with or without the lever.

[0085] Any numerical value recited herein includes all values ​​from the lowest value to the highest value in increments of one unit, provided that there is a separation of at least two units between the lowest and highest values. As an example, if the amount of a component or value of a process variable, e.g., temperature, pressure, time, etc., is stated to be, for example, 1 to 90, preferably 20 to 80, and more preferably 30 to 70, the present specification explicitly recites values ​​such as 15 to 85, 22 to 68, 43 to 51, 30 to 32, etc. For values ​​less than one, one unit is considered to be 0.0001, 0.001, 0.01, or 0.1, as appropriate. These are merely examples of what is specifically intended, and all possible combinations of numerical values ​​between the lowest and highest recited values ​​should be considered to be explicitly stated in the same manner in this application.

[0086] Unless otherwise stated, all ranges include the endpoints and all numbers between them. The use of "about" or "approximately" in connection with a range applies to both ends of the range. Thus, "about 20 to 30" is intended to encompass "about 20 to about 30," inclusive of at least the specified endpoints.

[0087] The disclosures of all articles and references, including patent applications and publications, are incorporated by reference for all purposes. The term "consisting essentially of" to describe a combination is intended to include the specified elements, ingredients, components, or steps with other elements, ingredients, components, or steps that do not materially affect the basic and novel characteristics of the combination. Also, when the terms "comprising" or "including" are used herein to describe a combination of elements, ingredients, components, or steps, embodiments that consist essentially of or consist of the elements, ingredients, components, or steps are contemplated.

[0088] A plurality of elements, components, parts, or steps may be provided by a single integrated element, component, part, or step. Alternatively, a single element, component, part, or step may be divided into a plurality of elements, components, parts, or steps. The disclosure of "a" or "one" to describe an element, component, part, or step is not intended to exclude additional elements, components, parts, or steps.

[0089] The relative positions of elements depicted in the drawings are part of the teachings herein even if not verbally stated. Additionally, the geometries shown in the drawings (while not intended to be limiting) are also within the scope of the present teachings even if not verbally stated. [Explanation of symbols]

[0090] 10 Steering column assembly 12 Front end 14 Rear end 16 Bracket 18 Column housing 20 column tube 22 Steering shaft 24 Tilt Plate 32 Lever

Claims

1. a. an engagement plate having an elongated body; b. a telescoping plate disposed at least partially within the engagement plate; An assembly for a steering column assembly, comprising: the elongated body portion of the engagement plate is configured to be positioned between a column tube of the steering column assembly and the telescope plate, the engaging plate and the telescoping plate have one or more features that engage or contact each other to provide energy absorption upon impact above a threshold load; One of the features of the engagement plate or the telescoping plate is one or more protrusions or projections adapted to contact and / or be received within one or more generally longitudinally extending slots of the other of the engagement plate or the telescoping plate.

1. An assembly characterized by:

2. The one or more features of the engagement plate and the telescope plate frictionally engage with each other.

2. The assembly of claim 1.

3. The engagement plate includes the one or more protrusions or projections, the telescoping plate having the one or more generally longitudinally extending slots; The one or more protrusions or projections are configured to be received within the one or more generally longitudinally extending slots.

3. An assembly according to claim 1 or 2.

4. Energy absorption is achieved by friction and / or deformation caused by forcing one or more of the protrusions or projections through one or more of the generally longitudinally extending slots.

4. An assembly according to any one of claims 1 to 3.

5. Each of the one or more generally longitudinally extending slots has a wide portion and a narrow portion having a width equal to or less than the width of the protrusion or projection, and the one or more protrusions or projections are forced through the narrow portion of the generally longitudinally extending slot to achieve energy absorption.

5. The assembly of claim 4.

6. The one or more protrusions or projections are two protrusions or projections, the one or more slots are two slots; A rib is disposed between the two slots, the rib being located between the two protrusions or projections.

6. An assembly according to any one of claims 1 to 5.

7. Energy absorption is achieved by friction and / or deformation caused by forcing the rib through the small width defined by the two protrusions or projections.

7. The assembly of claim 6.

8. The telescoping plate includes the one or more protrusions or projections, and the engagement plate includes the one or more generally longitudinally extending slots.

3. An assembly according to claim 1 or 2.

9. Energy absorption is achieved by friction and / or deformation of the one or more projections or protrusions from the telescoping plate through one or more narrow portions of the generally longitudinally extending slots in the engagement plate, the narrow portions having a width equal to or less than the width of the projections or protrusions.

9. The assembly of claim 8.

10. Energy absorption is achieved by friction and / or deformation caused by forcing one or more ribs of the engagement plate through a small width defined by two or more protrusions.

10. An assembly according to claim 8 or 9.

11. The engagement plate includes one or more mounting features configured to engage openings in the column tube to maintain the position of the engagement plate on the column tube.

11. An assembly according to any one of claims 1 to 10.

12. The engagement plate includes one or more retention features to limit or prevent separation of the engagement plate and the telescope plate.

12. An assembly according to any one of claims 1 to 11.

13. The retention feature may be a lip or multiple lip segments on one or more edges.

13. The assembly of claim 12.

14. The retention feature is a notch, and the telescoping plate includes a protrusion extending from an edge of the telescoping plate for engaging the notch.

13. The assembly of claim 12.

15. The engagement plate is one or more fastener openings for fastening the engagement plate to the column tube; b. one or more mounting features for maintaining the position of the engagement plate on the column tube; c. the one or more generally longitudinally extending slots, each slot having a wide portion and a narrow portion; d. one or more ribs, each rib having a wide portion and a narrow portion; e. one or more retention features for limiting or preventing separation of the engagement plate and the telescoping plate; Equipped with 2. The assembly of claim 1.

16. The telescoping plate has a generally flat portion, and a toothed surface extends across at least a portion of the generally flat portion.

16. An assembly according to any one of claims 1 to 15.

17. the telescope plate includes the one or more protrusions or projections, The one or more protrusions or projections extend from an edge of the telescope plate toward the column tube.

17. An assembly according to any one of claims 1 to 16.

18. a. a column tube; b. a steering shaft rotatably supported at least in part by the column tube; c) a bracket that at least partially supports the column tube; d. an adjustment subassembly; e. an assembly according to any one of claims 1 to 17 for providing energy absorption upon impact above a threshold load; A steering column assembly comprising:

19. The adjustment subassembly includes: a. selectively adjusting the steering shaft, the column tube, or both, in a forward or rearward direction along a general longitudinal axis; b. Selectively raising or lowering the steering shaft, the column tube, or both; c. both a. and b.; conforms to 20. The steering column assembly of claim 18.

20. The telescope plate and / or the engagement plate are fixed to the column tube by one or more fasteners.

20. A steering column assembly according to claim 18 or 19.

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