WO2014119607A1 - ステアリングコラム装置 - Google Patents
ステアリングコラム装置 Download PDFInfo
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- WO2014119607A1 WO2014119607A1 PCT/JP2014/051923 JP2014051923W WO2014119607A1 WO 2014119607 A1 WO2014119607 A1 WO 2014119607A1 JP 2014051923 W JP2014051923 W JP 2014051923W WO 2014119607 A1 WO2014119607 A1 WO 2014119607A1
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- plate
- hole
- suspension
- pair
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/16—Steering columns
- B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
- B62D1/19—Steering columns yieldable or adjustable, e.g. tiltable incorporating energy-absorbing arrangements, e.g. by being yieldable or collapsible
- B62D1/195—Yieldable supports for the steering column
Definitions
- the present invention relates to a steering column device.
- Patent Document 1 proposes an assembly process in which a vehicle body side bracket and a column side bracket that are separated from each other at the time of a secondary collision are rigidly fastened by bolts and nuts.
- the assembly process after the vehicle body side bracket is temporarily assembled at the temporary assembly position shifted from the normal assembly position with respect to the column bracket, the movement when the vehicle body side bracket is moved to the regular assembly position with respect to the column side bracket. The load is measured, and both brackets are fastened with the target value of the tightening torque obtained using the measured actual moving load.
- an object of the present invention is to provide a steering column device that can easily manage the tightening torque of the suspension bolt, reduce the number of assembly steps, and can suppress the variation in the separation load.
- a first plate (30) fixed to a vehicle body side member (13) is included.
- X1) is a movable bracket that rotatably supports a fixed bracket (23) having a first hole (31) formed of a long hole extending in parallel to the X1) and a steering shaft (3) having a steering member (2) connected to one end thereof.
- the second plate includes a jacket (16), a second plate (32) that supports the movable jacket so as to move in the column movement direction together with the movable jacket in a secondary collision, and faces the first plate.
- a movable bracket (24) having a second hole (33) opposed to the first hole, and a movable bracket (24) supported by the first plate and suspended from the movable jacket via the movable bracket.
- a suspension mechanism T1, T2 movable to the suspension mechanism, wherein the suspension mechanism is screwed onto the suspension bolt and a suspension bolt (25) inserted through the first hole and the second hole.
- Steering column device including a leaf spring for biasing (42) (1) is provided interposed to said first plate to said second plate side between the first plate.
- a pair of the first holes are provided in a direction perpendicular to the column moving direction, and a pair of the second holes are provided in a direction perpendicular to the column moving direction.
- a pair of lowering bolts are provided and inserted through the corresponding first holes and the corresponding second holes, respectively, and the leaf springs are provided as a pair of annular disc springs through which the corresponding hanging bolts are inserted. There may be.
- the suspension mechanism includes an interposed plate (43) interposed between the leaf spring and the first plate, and at least one of the interposed plate and a sliding portion of the first plate with respect to the interposed plate.
- the interposition plate has a pair of suspension shaft insertion holes through which the pair of suspension bolts are respectively inserted, and extends in a direction orthogonal to the column moving direction so as to serve as the pair of plate springs. It may be a single long plate that receives the plate.
- the leaf spring interposed between the head of the suspension bolt and the second plate in a state in which the stepped portion of the suspension bolt is in contact with the second plate causes the first plate to be the second plate.
- the first plate and the second plate are fastened by elastically biasing the plate side and sandwiching the second plate between the stepped portion and the nut. That is, the tightening force of the suspension bolt, which is a so-called shut-off type, does not affect the friction between the first plate and the second plate that move relative to each other at the time of the secondary collision, so that the tightening torque can be easily managed. It is not necessary to adjust the torque individually for each product as in Patent Document 1, and the number of assembling steps can be reduced.
- the positional accuracy between the head and the stepped portion in a single member called a suspension bolt is high, and the distance between the head and the stepped portion with high positional accuracy is regulated by the distance between the head and the second plate. Therefore, the interval between the head and the second plate can be set with high accuracy. Therefore, since the initial load of the leaf spring can be set with high accuracy, it is possible to suppress the variation in the separation load at the time of the secondary collision.
- the suspension bolts are of a so-called deadline type, so that it is not necessary to alternately tighten and tighten the pair of suspension bolts, greatly reducing the number of assembly steps. can do.
- at least one of the sliding portions between the interposition plate interposed between the leaf spring and the first plate and the first plate is made of a low friction material, a pair of suspensions are provided at the time of the secondary collision. Bolts and a pair of disc springs can be smoothly moved in the column moving direction.
- the intervening plate is a single long plate that extends in a direction perpendicular to the column moving direction and through which a pair of suspension bolts are inserted, a pair of suspension bolts and the like are twisted during a secondary collision. Without being moved straight in the column moving direction.
- FIG. 2 is a schematic cross-sectional view of the steering column device of FIG. 1, showing a cross section taken along line II-II of FIG. It is a disassembled perspective view of the steering column apparatus of FIG. It is a partially broken schematic plan view of a fixed bracket, a pair of suspension mechanisms, and a connection / detachment mechanism. It is sectional drawing of the connection state of a 1st board and a 2nd board, and has shown the cross section of the front-back direction containing the axis line of the resin pin.
- FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. 2 and shows a cross section of the first plate and the coupling / detaching mechanism.
- FIG. 5 is a cross-sectional view taken along the line VIII-VIII in FIG. 2 and shows a cross section of the second plate and the coupling / detaching mechanism.
- it is a partially broken schematic plan view of a fixed bracket, a pair of suspension mechanisms, and a connection / release mechanism.
- FIG. 1 is a schematic diagram showing a schematic configuration of a steering column device according to an embodiment of the present invention.
- a steering column device 1 includes a steering shaft 3 connected to a steering member 2 such as a steering wheel, an intermediate shaft 5 connected to the steering shaft 3 via a universal joint 4, and an intermediate shaft 5 And a rack shaft 8 as a steered shaft having a rack 8a meshing with the pinion 7a provided in the vicinity of the end of the pinion shaft 7.
- the steering mechanism A1 is constituted by a rack and pinion mechanism including the pinion shaft 7 and the rack shaft 8.
- the rack shaft 8 is supported by a housing 10 fixed to the vehicle body side member 9 so as to be movable in an axial direction along the left-right direction of the vehicle (a direction orthogonal to the paper surface).
- each end of the rack shaft 8 is connected to a corresponding steered wheel via a corresponding tie rod and a corresponding knuckle arm.
- the steering shaft 3 includes an upper shaft 11 and a lower shaft 12 that are connected to each other so as to be able to rotate together and to be relatively movable in the axial direction by using, for example, spline coupling.
- the steering shaft 3 is rotatably supported by a steering column 15 fixed to the vehicle body side members 13 and 14 via a bearing (not shown).
- the steering column 15 includes a cylindrical upper jacket 16 (movable jacket) fitted so as to be relatively movable in the axial direction, a cylindrical lower jacket 17, and a housing 18 connected to the lower axial end of the lower jacket 17. I have.
- the housing 18 houses a speed reduction mechanism 20 that decelerates the power of the steering assisting electric motor 19 and transmits it to the lower shaft 12.
- the speed reduction mechanism 20 includes a drive gear 21 that is coupled to a rotation shaft (not shown) of the electric motor 19 so as to be able to rotate together with the drive gear 21 and a driven gear 22 that meshes with the drive gear 21 and rotates along with the lower shaft 12. .
- the steering column apparatus 1 will be described based on an example in which the steering column apparatus 1 is applied to an electric power steering apparatus.
- the present invention may be applied to a manual steering apparatus.
- the case where the steering column device 1 can be tilt-adjusted will be described.
- the present invention may be applied to a steering column device that does not have a tilt adjustment function.
- the present invention may be applied to an adjustable and telescopic adjustable steering column device.
- the steering column apparatus 1 includes a pair of suspension mechanisms T1 and T2 that are supported by a fixed bracket 23 and suspend the upper jacket 16 through a tilt bracket 24 as a movable bracket. I have.
- the suspension mechanisms T1 and T2 move together with the tilt bracket 24 and the upper jacket 16 in the column movement direction X1 (see FIG. 1; a direction perpendicular to the paper surface in FIG. 2) together with the tilt bracket 24 and the upper jacket 16.
- a tilt bracket 24 as a movable bracket is suspended from a fixed bracket 23 fixed to the vehicle body side member 13 as a suspension shaft of a pair of suspension mechanisms T1 and T2. It is suspended via a bolt 25.
- a column bracket 26 is fixed to the upper jacket 16 of the steering column 15.
- the steering column device 1 locks the position of the column bracket 26 after tilt adjustment by the tightening shaft 28 via the tilt bracket 24 according to the operation of the operation lever 27.
- a lock mechanism 29 for releasing the lock is provided. That is, the lock mechanism 29 locks or releases the positions of the upper jacket 16 and the steering member 2 after the tilt adjustment.
- the tilt bracket 24 includes a pair of side plates 41.
- the column bracket 26 has a pair of side plates 41 facing the pair of side plates 41.
- the groove plate is provided with a side plate 71 and a connecting plate 72 that connects the lower ends of the pair of side plates 71.
- the tightening shaft 28 includes bolts that penetrate the side plates 41 and 71 of the tilt bracket 24 and the column bracket 26.
- the both side plates 41 and 71 are tightened between the head of the bolt as the tightening shaft 28 and the nut 73, Both side plates 41 and 71 are locked. Thereby, the position of the steering member 2 after the tilt adjustment is locked to achieve the tilt lock.
- the steering column device 1 connects the first plate 30 of the fixed bracket 23 and the second plate 32 of the tilt bracket 24, and the second plate 32 is moved to a predetermined position of the first plate 30 (see FIG. 5) at the time of a secondary collision.
- a connecting / disconnecting mechanism R1 for releasing in the column moving direction X1 is provided.
- the connection / disengagement mechanism R1 is disposed between the pair of suspension mechanisms T1 and T2 with respect to the direction Y1 orthogonal to the column movement direction X1. ing.
- the connecting / disconnecting mechanism R1 is disposed between a pair of first holes 31 (described later) of the first plate 30 of the fixing bracket 23 with respect to the direction Y1. Specifically, the connecting / disconnecting mechanism R1 is disposed at a central position between the pair of first holes 31 (that is, between the pair of hanging bolts 25) in the direction Y1 orthogonal to the column moving direction X1. Yes.
- the fixed bracket 23 includes a first plate 30 that is parallel to the column moving direction X1 (corresponding to the axial direction of the steering shaft 3) at the time of the secondary collision.
- the first plate 30 is formed with a first hole 31 for the suspension mechanisms T1 and T2, which is a long hole extending in parallel with the column moving direction X1.
- the tilt bracket 24 (movable bracket) includes a second plate 32 that faces the first plate 30.
- the second plate 32 is formed with a second hole 33 for the suspension mechanisms T1 and T2 that faces a part of the first hole 31.
- the suspension bolt 25 is configured by a bolt that is inserted into the first hole 31 of the first plate 30 and the second hole 33 of the second plate 32 and screwed into the nut 34.
- a suspension bolt 25 that connects the first plate 30 and the second plate 32 in cooperation with the nut 34 suspends the upper jacket 16 (movable jacket) via the tilt bracket 24 (movable bracket) and the column bracket 26. ing.
- the suspension bolt 25 is movable in the column movement direction X1 along with the tilt bracket 24 (movable bracket), the column bracket 26 and the upper jacket 16 along the first hole 31 at the time of a secondary collision.
- a lower bracket 35 fixed to the vehicle body side member 14 supports a tilt center shaft 36 that is a pivot shaft.
- the tilt center shaft 36 supports the lower jacket 17 through the housing 18 of the steering column 15 so as to be swingable about the tilt center shaft 36.
- each suspension mechanism T1, T2 is composed of a suspension bolt 25, a disc spring 42 as a leaf spring, a nut 34, and the like.
- the connection / disengagement mechanism R1 includes a resin pin 61 that shears at the time of a secondary collision, and a cylindrical metal collar 62 that is fitted to a part of the resin pin 61 in the axial direction.
- the fixing bracket 23 includes a pair of side plates 37 extending downward from a pair of side edges of the first plate 30, and a pair of side plates 37 extending outward from the pair of side plates 37. And an attachment plate 38.
- the fixed bracket 23 is formed of, for example, a sheet metal.
- Each mounting plate 38 is fixed to the vehicle body side member 13 by a fixing bolt 40 (see FIG. 4) inserted through a screw insertion hole 39 (see FIGS. 3 and 4) provided in each mounting plate 38. Thereby, the fixing bracket 23 is fixed to the vehicle body side member 13.
- the tilt bracket 24 (movable bracket) is formed of, for example, a sheet metal.
- the tilt bracket 24 includes a second plate 32 and a pair of side plates 41 extending downward from a pair of side edges of the second plate 32, and has a groove shape.
- the connection part between the second plate 32 and each side plate 41 may be formed in a curved shape as shown in FIGS.
- each suspension bolt 25 corresponds to an annular disc spring 42 as a plate spring, a corresponding insertion hole 44 of the first interposed plate 43, a corresponding first hole 31 of the first plate 30, and a second plate 32.
- the second holes 33 are sequentially inserted and screwed into the nuts 34. As a result, the suspension bolt 25 suspends the tilt bracket 24.
- the first intervening plate 43 is a long plate extending in the direction Y1 perpendicular to the column moving direction X1, and as shown in FIG. 2, the two disc springs 42 and the first plate 30 are provided. Between the upper surface 30a and the upper surface 30a. At least the surface on the first plate 30 side of the first interposed plate 43 is made of a low friction material such as a fluororesin. That is, the entire first interposed plate 43 may be made of a low friction material, or the surface of the first interposed plate 43 on the first plate 30 side may be covered with the low friction material.
- a low friction material such as a fluororesin
- the second plate 32 acts to reduce the sliding resistance when the second plate 32 moves in the column movement direction X1 with respect to the first plate 30 at the time of a secondary collision.
- a second interposed plate 45 and a third interposed plate 46 are interposed.
- the second interposed plate 45 constitutes a groove-shaped unit 45U that is locked to the first end 321 that is the end of the second plate 32 on the column moving direction X1 side. That is, the unit 45U includes a second interposed plate 45 along the upper surface 32a of the second plate 32 and the lower surface 30b of the first plate 30, and a counter plate that faces the second interposed plate 45 and extends along the lower surface 32b of the second plate 32. 47, and a connecting plate 48 that connects the second interposed plate 45 and the opposing plate 47 and abuts the edge of the second plate 32 on the column moving direction X1 side.
- At least the surface on the first plate 30 side of the second interposed plate 45 is made of a low friction material such as a fluororesin. That is, the second interposed plate 45 to the unit 45U may be made of a low friction material, or the surface of the second interposed plate 45 on the first plate 30 side may be covered with the low friction material.
- the third intervening plate 46 is a second end 302 that is the end opposite to the column moving direction X1 of the first plate 30 and a second end that is opposite to the column moving direction X1 of the second plate 32. A unit 46U locked to the two end portions 322 is formed.
- the unit 46U includes a third interposed plate 46 along the upper surface 32a of the second plate 32 and the lower surface 30b of the first plate 30, and a counter plate that faces the third interposed plate 46 and extends along the upper surface 30a of the first plate 30. 49. Further, the unit 46U connects the third interposed plate 46 and the opposing plate 49 and contacts the edge of the first plate 30 opposite to the Lacom moving direction X1 and the second plate 32. For example, a hook-shaped hook 51 that is hooked and locked to the two end portions 322 is provided.
- each suspension bolt 25 includes a head 52, a large diameter portion 53 that is continuous with the head 52 and has a smaller diameter than the head 52, and a large diameter portion 53 that is continuous with the large diameter portion 53.
- a small diameter portion 54 having a small diameter, a step portion 55 formed between the large diameter portion 53 and the small diameter portion 54, and a screw portion 56 provided on the small diameter portion 54 are provided.
- the head 52 is provided with a tool engaging portion 57 having a hexagonal hole shape, for example.
- the large-diameter portion 53 passes through the annular disc spring 42, the insertion hole 44 of the first interposed plate 43, and the first hole 31 of the first plate 30.
- the step portion 55 contacts the upper surface 32a of the second plate 32 and is received by the upper surface 32a.
- the second plate 32 is sandwiched between the stepped portion 55 and the nut 34, and the suspension bolt 25 and the second plate 32 are fixed.
- the distance H1 between the head 52 and the stepped portion 55 (corresponding to the axial length of the large diameter portion 53) is the thickness (or the first thickness) of the second interposed plate 45 interposed between the first plate 30 and the second plate 32.
- the thickness of the first plate 30, the thickness of the first interposed plate 43 along the upper surface 30 a of the first plate 30, and the plate thickness of the disc spring 42 at the time of maximum compression. has been larger than the total.
- the disc spring 42 elastically urges the first plate 30 toward the second plate 32 via the first interposed plate 43.
- the resin pin 61 of the connecting / leaving mechanism R1 includes, for example, a head 63 having a circular cross section and a cylindrical shaft 64 having a smaller diameter than the head 63.
- the cylindrical metal collar 62 is fitted on the outer periphery of the shaft portion 64.
- the outer diameter of the metal collar 62 is made equal to the outer diameter of the head 63 of the resin pin 61.
- the first end 621 in the axial direction of the metal collar 62 abuts on the head 63 of the resin pin 61, and the second end 622 in the axial direction of the metal collar 62 is received by the upper surface 32 a of the second plate 32. Yes. Thereby, the resin pin 61 and the metal collar 62 are prevented from dropping down below the second plate 32.
- the first interposed plate 43 is disposed so as to cover the top of the head 63 of the resin pin 61, so that the resin pin 61 is prevented from falling off.
- a peep hole 65 smaller than the outer diameter of the head 63 is formed in the first interposed plate 43 so as to face the head 63 of the resin pin 61.
- the head 63 of the resin pin 61 and most of the metal collar 62 are inserted into the first hole 66 of the first plate 30 of the fixing bracket 23 for the connection / release mechanism R1.
- a part of the metal collar 62 protrudes from the first hole 66.
- a portion of the shaft portion 64 of the resin pin 61 that protrudes from the metal collar 62 is inserted into the second hole 67 for the connecting / disengaging mechanism R1 of the second plate 32 of the tilt bracket 24 (movable bracket).
- the first hole 66 for the connecting / disconnecting mechanism R1 of the first plate 30 is suspended in the direction Y1 perpendicular to the column moving direction X1. It arrange
- the first hole 66 for the connecting / disengaging mechanism R1 of the first plate 30 is formed as a horizontally long hole in the direction Y1 orthogonal to the column moving direction X1.
- gaps S1 and S2 are provided between the outer periphery of the metal collar 62 and the inner periphery of the first hole 66 in the direction Y1 orthogonal to the column movement direction X1. Since there are gaps S1 and S2, even if the first plate 30 and the second plate 32 are slightly misaligned in the direction Y1 perpendicular to the column moving direction X1 due to some external force during transportation or assembly.
- the resin pin 61 is not sheared.
- the second hole 67 for the coupling / disengaging mechanism R1 of the second plate 32 of the tilt bracket 24 is orthogonal to the column moving direction X1. With respect to the direction Y1, it is disposed at the center position between the pair of second holes 33 for the suspension mechanisms T1, T2.
- the second hole 67 is formed by a circular hole having an inner diameter that is the same as or slightly larger than the outer diameter of the shaft portion 64 of the resin pin 61.
- the shaft portion 64 of the resin pin 61 is sheared by the displacement of the mating surface between the second end portion 622 of the metal collar 62 and the second plate 32.
- the shearing blade constituted by the inner peripheral edge of the second end 622 of the metal collar 62 is arcuate, and the shearing blade constituted by the edge of the second hole 67 of the second plate 32 is also arcuate.
- the head 52 and the second plate 32 of the suspension bolt 25 are in contact with each other.
- the first plate 30 and the second plate 32 are fastened. That is, the tightening force of the suspension bolt 25, which is a so-called shut-off type, does not affect the friction between the first plate 30 and the second plate 32 that move relative to each other at the time of the secondary collision. It is. It is not necessary to adjust the torque individually for each product as in Patent Document 1, and the number of assembling steps can be reduced.
- the positional accuracy between the head 52 and the stepped portion 55 in a single member called the suspension bolt 25 is high, and the head 52 and the stepped portion 55 are separated by the distance H1 between the head 52 and the stepped portion 55 with high positional accuracy. Since the interval between the second plate 32 is restricted, the interval between the head 52 and the second plate 32 can be set with high accuracy. Therefore, since the initial load of the disc spring 42 can be set with high accuracy, it is possible to suppress the variation in the separation load at the time of the secondary collision.
- the suspension bolt 25 is a so-called deadline type, so that an operation of alternately tightening the pair of suspension bolts 25 is unnecessary.
- the number of assembly steps can be significantly reduced.
- the pair of hanging bolts 25, the pair of disc springs 42, etc. can be smoothly moved in the column moving direction X1.
- the first interposed plate 43 is a single long plate that extends in the direction Y1 perpendicular to the column moving direction X1 and through which the pair of suspension bolts 25 are inserted, a pair of suspension plates during a secondary collision.
- the lowering bolt 25 and the like can be moved straight in the column moving direction X1 without being twisted.
- a second interposed plate 45 that moves along with the second plate 32 at the time of the secondary collision is interposed between the first plate 30 and the second plate 32, and at least the first plate 30 side of the second interposed plate 45 is interposed.
- the surface is made of low friction material.
- a third interposed plate 46 is interposed between the first plate 30 and the second plate 32 and is held by the first plate 30 and moves relative to the upper surface 32a of the second plate 32 at the time of a secondary collision. At least the second plate 32 side surface of the third interposed plate 46 that slides with the second plate 32 is made of a low friction material.
- a connecting / disengaging mechanism R1 for detaching the second plate 32 of the tilt bracket 24 (movable bracket) from a predetermined position (see FIG. 5) of the first plate 30 of the fixed bracket 23 in the column moving direction X1 at the time of a secondary collision is provided.
- the tilt bracket 24 can be moved straight in the column movement direction X1.
- the resin plate 61 provided as a single unit between the pair of first holes 31 in the direction Y1 perpendicular to the column movement direction X1 shears, so that the first plate of the fixing bracket 23 is sheared.
- the second plate 32 of the tilt bracket 24 is detached from the predetermined position 30. It is possible to prevent the moment imbalance around the resin pin 61 from occurring at the time of the secondary collision, suppress the occurrence of the twisting of both the brackets 23 and 24, and move the tilt bracket 24 straight in the column movement direction X1. it can.
- the connecting / disconnecting mechanism R1 is disposed at the center position between the pair of first holes 31 in the direction Y1 perpendicular to the column moving direction X1, it is ensured that the twisting occurs during the secondary collision. In this way, the tilt bracket 24 can be reliably moved straight in the column movement direction X1. Also, during the secondary collision, as shown in FIGS. 5 and 6, shearing is performed so that a part 641 of the shaft part 64 is separated from the remaining part as the first plate 30 and the second plate 32 move relative to each other. The resin pin 61 of the connecting / disconnecting mechanism R1 is inserted through the first hole 66 of the first plate 30 and the second hole 67 of the second plate 32. As shown in FIG.
- the first hole 66 and the resin pin 61 are relatively movable by a predetermined amount in the direction Y1 orthogonal to the column movement direction X1. Specifically, gaps S1 and S2 are provided between the outer periphery of the metal collar 62 fitted to the outer periphery of the resin pin 61 and the inner periphery of the first hole 66 in the direction Y1 orthogonal to the column moving direction X1. It has been. Therefore, when the steering column device 1 before being assembled to the vehicle is transported or when the steering column device 1 is assembled to the vehicle, even if a lateral impact is applied by some external force, the resin pin 61 may be sheared. Absent.
- the second hole 67 through which the resin pin 61 is inserted has an arcuate cross-sectional shape in a region opposite to the column moving direction X1 (specifically, the second hole 67 The entire cross section of the hole 67 is circular). Therefore, at the time of the secondary collision, the resin pin 61 does not fall down in the column movement direction X1 (so-called rolling) and smoothly shears. Therefore, a stable shock absorbing load can be obtained.
- the resin pin 61 includes a cylindrical section (corresponding to the shaft portion 64) having a straight cross-sectional shape straddling the first hole 66 and the second hole 67.
- the shear area is constant, and a stable shock absorbing load can be obtained.
- the metal collar 62 whose inner periphery has a circular cross section is fitted to the outer periphery of the cylindrical portion (shaft portion 64) of the resin pin 61, and the metal collar 62 is connected to the first plate 30.
- the second end 622 of the metal collar 62 is received by the peripheral edge of the second hole 67 of the upper surface 32 a of the second plate 32 through the first hole 66.
- the resin between the pair of portions (the inner periphery of the second end 622 of the metal collar 62 and the periphery of the upper end of the second hole 67) between the pair of shearing blades that shear the resin pin 61 at the time of the secondary collision.
- the gap in the axial direction of the pin 61 can be almost eliminated. Therefore, the resin pin 61 is not bent during shearing, and the shear load of the resin pin 61 can be stabilized.
- connection / disengagement mechanism R1 of the embodiment of FIG. 4 as shown in the embodiment of FIG. 9, a single row aligned in the column movement direction X1 is used.
- a connection / detachment mechanism R10 including a plurality of provided resin pins 61A, 61B, 61C may be used.
- the resin pins 61A, 61B, 61C are inserted through the corresponding first holes 66A, 66B, 66C, respectively.
- the rows of the resin pins 61A, 61B, 61C are arranged at the center position between the pair of first holes 31 with respect to the direction Y1 orthogonal to the column moving direction X1.
- the same effect as the embodiment of FIG. 4 can be obtained.
- the separation load can be easily set by selecting the number of the resin pins 61A, 61B, 61C.
- the same components as those in the embodiment of FIG. 4 are denoted by the same reference numerals as those of the components in the embodiment of FIG.
- various modifications can be made within the scope of the claims of the present invention.
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Abstract
Description
特許文献1では、二次衝突時に互いに離脱する車体側ブラケットとコラム側ブラケットとを、ボルトおよびナットによって剛的に締結する組み付け工程が提案されている。その組み付け工程では、コラムブラケットに対して正規の組み付け位置からずれた仮組み付け位置で車体側ブラケットを仮組み付けした後、コラム側ブラケットに対して車体側ブラケットを正規の組み付け位置まで移動させるときの移動荷重を計測し、計測された実際の移動荷重を用いて求められた締め付けトルクの狙い値で両ブラケットを締結する。
そこで、本発明の目的は、吊り下げボルトの締め付けトルクの管理を容易にして組立工数を削減でき、しかも離脱荷重のばらつきを抑制することができるステアリングコラム装置を提供することである。
また、前記第1孔は、前記コラム移動方向とは直交する方向に離隔して一対設けられ、前記第2孔は、前記コラム移動方向とは直交する方向に離隔して一対設けられ、前記吊り下げボルトは、一対設けられて、対応する第1孔および対応する第2孔にそれぞれ挿通され、前記板ばねは、一対設けられて、それぞれ対応する吊り下げボルトを挿通させた環状の皿ばねであってもよい。
また、前記介在板は、前記一対の吊り下げボルトがそれぞれ挿通された一対の吊り下げ軸挿通孔を有し、前記コラム移動方向とは直交する方向に延びて前記一対の板ばねとしての皿ばねを受ける単一の長板であってもよい。
また、板ばねと第1板との間に介在した介在板と、第1板との摺動部の少なくとも一方が、低摩擦材で構成されているので、二次衝突時に、一対の吊り下げボルト、一対の皿ばね等をスムーズにコラム移動方向に移動させることができる。
図1は本発明の一実施形態のステアリングコラム装置の概略構成を示す模式図である。図1を参照して、ステアリングコラム装置1は、ステアリングホイール等の操舵部材2に連結されたステアリングシャフト3と、ステアリングシャフト3に自在継手4を介して連結された中間軸5と、中間軸5に自在継手6を介して連結されたピニオン軸7と、ピニオン軸7の端部近傍に設けられたピニオン7aに噛み合うラック8aを有する転舵軸としてのラック軸8とを備えている。
ステアリングコラム15は、軸方向に相対移動可能に嵌め合わされた筒状のアッパージャケット16(可動ジャケット)と、筒状のロアージャケット17と、ロアージャケット17の軸方向下端に連結されたハウジング18とを備えている。ハウジング18内には、操舵補助用の電動モータ19の動力を減速してロアーシャフト12に伝達する減速機構20が収容されている。減速機構20は、電動モータ19の回転軸(図示せず)と同行回転可能に連結された駆動ギヤ21と、駆動ギヤ21に噛み合いロアーシャフト12と同行回転する被動ギヤ22とを有している。
図2、図3に示すように、チルトブラケット24は、一対の側板41を備えており、図2に示すように、コラムブラケット26は、チルトブラケット24の一対の側板41にそれぞれ対向する一対の側板71と、一対の側板71の下端間を連結する連結板72とを備えた溝形をなしている。
図2および一部破断概略平面図である図4に示すように、連結・離脱機構R1は、コラム移動方向X1とは直交する方向Y1に関して、一対の吊り下げ機構T1,T2の間に配置されている。すなわち、連結・離脱機構R1は、方向Y1に関して、固定ブラケット23の第1板30の後述する一対の第1孔31の間に配置されている。具体的には、連結・離脱機構R1は、コラム移動方向X1とは直交する方向Y1に関して、一対の第1孔31の間(すなわち一対の吊り下げボルト25の間)の中央位置に配置されている。
図2および図3に示すように、各吊り下げ機構T1,T2は、吊り下げボルト25と、板ばねとしての皿ばね42と、ナット34等により構成されている。連結・離脱機構R1は、二次衝突時に剪断する樹脂ピン61と、樹脂ピン61の軸方向の一部に嵌合した円筒状の金属カラー62とで構成されている。
図2、図3に示すように、チルトブラケット24(可動ブラケット)は、例えば板金により形成されている。チルトブラケット24は、第2板32と、第2板32の一対の側縁から下向きに延設された一対の側板41とを備えており、溝形をなしている。第2板32と各側板41との連結部は、図2、図3に示すように湾曲状に形成されていてもよい。
第2介在板45は、第2板32のコラム移動方向X1側の端部である第1端部321に係止された溝形のユニット45Uを構成している。すなわち、ユニット45Uは、第2板32の上面32aおよび第1板30の下面30bに沿う第2介在板45と、第2介在板45と対向し且つ第2板32の下面32bに沿う対向板47と、第2介在板45と対向板47とを連結し且つ第2板32のコラム移動方向X1側の端縁に当接する連結板48とを備えている。
第3介在板46は、第1板30のコラム移動方向X1とは反対側の端部である第2端部302および第2板32のコラム移動方向X1とは反対側の端部である第2端部322に係止されたユニット46Uを構成している。すなわち、ユニット46Uは、第2板32の上面32aおよび第1板30の下面30bに沿う第3介在板46と、第3介在板46に対向し且つ第1板30の上面30aに沿う対向板49とを備えている。また、ユニット46Uは、第3介在板46と対向板49とを連結し且つ第1板30のラコム移動方向X1とは反対側の端縁に当接する連結板50と、第2板32の第2端部322に引っ掛け係止される例えば鉤形フック状の係止部51とを備えている。
図2および図3に示すように、各吊り下げボルト25は、頭部52と、頭部52に連なり頭部52より小径の大径部53と、大径部53に連なり大径部53より小径の小径部54と、大径部53と小径部54との間に形成された段部55と、小径部54に設けられたねじ部56とを備えている。頭部52には、例えば六角孔形状の工具係合部57が設けられている。
頭部52と段部55との間隔H1(大径部53の軸長に相当)は、第1板30と第2板32との間に介在する第2介在板45の板厚(ないし第3介在板46の板厚)と、第1板30の板厚と、第1板30の上面30aに沿う第1介在板43の板厚と、最圧縮時の皿ばね42の板厚との合計よりも大きくされている。これにより、皿ばね42が、第1介在板43を介して第1板30を第2板32側へ弾性的に付勢している。
隙間S1,S2があるので、運搬時や組み付け時に、何らかの外力によって、第1板30と第2板32とが、コラム移動方向X1とは直交する方向Y1に、多少位置ずれを生じたとしても、樹脂ピン61が剪断することがない。
本実施形態によれば、図2に示すように、吊り下げボルト25の段部55を第2板32に当接させた状態で、吊り下げボルト25の頭部52と第2板32との間に介在する板ばねとしての皿ばね42が、第1板30を第2板32側に弾性的に付勢すると共に、段部55とナット34との間で第2板32を挟持することで、第1板30と第2板32とを締結している。すなわち、いわゆる締め切り型である吊り下げボルト25の締め付け力が、二次衝突時に相対移動する第1板30と第2板32との間の摩擦に影響を与えないので、締め付けトルクの管理が容易である。特許文献1のような全品個別のトルク調整も不要であり、組立工数を削減することができる。
また、第1介在板43が、コラム移動方向X1とは直交する方向Y1に延び、一対の吊り下げボルト25をそれぞれ挿通させた単一の長板であるので、二次衝突時に、一対の吊り下げボルト25等をこじり生ずることなく、コラム移動方向X1に真直に移動させることができる。
二次衝突時に、チルトブラケット24(可動ブラケット)の第2板32を固定ブラケット23の第1板30の所定位置(図5参照)からコラム移動方向X1に離脱させる連結・離脱機構R1が、コラム移動方向X1とは直交する方向Y1に関して、一対の長孔からなる第1孔31の間のみに設けられているので、二次衝突時の固定ブラケット23に対するチルトブラケット24のこじりの発生を抑制して、チルトブラケット24をコラム移動方向X1に真直に移動させることができる。
また、二次衝突時に、図5、図6に示すように、第1板30と第2板32との相対移動に伴って軸部64の一部641が残りの部分から分離するように剪断する連結・離脱機構R1の樹脂ピン61が、第1板30の第1孔66と第2板32の第2孔67とに挿通されている。図7に示すように、コラム移動方向X1とは直交する方向Y1に関して、第1孔66と樹脂ピン61とが所定量相対移動可能である。具体的には、樹脂ピン61の外周に嵌合された金属カラー62の外周と第1孔66の内周との間に、コラム移動方向X1とは直交する方向Y1に関して隙間S1,S2が設けられている。したがって、車両への組み付け前のステアリングコラム装置1を運搬するときや、ステアリングコラム装置1を車両へ組み付けるときに、何らかの外力で横方向の衝撃が加わったとしても、樹脂ピン61が剪断することがない。
また、図5に示すように、内周が円断面をなす金属カラー62が、樹脂ピン61の円柱状部(軸部64)の外周に嵌合し、金属カラー62が、第1板30の第1孔66に挿通されて、金属カラー62の第2端部622が第2板32の上面32aの第2孔67の周縁によって受けられている。したがって、二次衝突時に、樹脂ピン61を剪断する一対の剪断刃として機能する一対の部位間(金属カラー62の第2端部622の内周と第2孔67の上端の周縁)の、樹脂ピン61の軸方向に関する隙間を殆どなくすことができる。したがって、剪断時に樹脂ピン61に曲げが及ぼされることがなく、樹脂ピン61の剪断荷重を安定させることができる。
その他、本発明の請求項記載の範囲内で種々の変更を施すことができる。
2 操舵部材
3 ステアリングシャフト
13 車体側部材
15 ステアリングコラム
16 アッパージャケット(可動ジャケット)
23 固定ブラケット
24 チルトブラケット(可動ブラケット)
25 吊り下げボルト
26 コラムブラケット
27 操作レバー
28 締付軸
29 ロック機構
30 第1板
31 (吊り下げ機構用の)第1孔
32 第2板
33 (吊り下げ機構用の)第2孔
34 ナット
42 皿ばね(板ばね)
43 第1介在板
44 挿通孔
45 第2介在板
45U ユニット
46 第3介在板
46U ユニット
52 頭部
53 大径部
54 小径部
55 段部
56 ねじ部
61;61A,61B,61C 樹脂ピン
62 金属カラー
63 頭部
64 軸部
65 覗き孔
66;66A,66B,66C (連結・離脱機構用の)第1孔
67 (連結・離脱機構用の)第2孔
R1;R10 連結・離脱機構
T1,T2 吊り下げ機構
X1 コラム移動方向
Y1 コラム移動方向とは直交する方向
Claims (4)
- 車体側部材に固定された第1板を含み、前記第1板に、二次衝突時のコラム移動方向と平行に延びる長孔からなる第1孔が形成された固定ブラケットと、
一端に操舵部材が連結されたステアリングシャフトを回転可能に支持する可動ジャケットと、
二次衝突時に前記可動ジャケットと共に前記コラム移動方向に移動するように前記可動ジャケットを支持し、前記第1板に対向する第2板を含み、前記第2板に、前記第1孔に対向する第2孔が形成された可動ブラケットと、
前記第1板に支持され、前記可動ブラケットを介して前記可動ジャケットを吊り下げて、二次衝突時に前記コラム移動方向に移動可能な吊り下げ機構と、を備え、
前記吊り下げ機構は、前記第1孔および前記第2孔を挿通する吊り下げボルトと、前記吊り下げボルトに螺合し前記吊り下げボルトと協働して前記第1板と前記第2板とを連結するナットと、を含み、
前記吊り下げボルトは、頭部と、前記頭部よりも小径で前記頭部に連なり前記第1孔に挿通された大径部と、前記大径部よりも小径で前記大径部に連なり前記第2孔に挿通された小径部と、前記大径部と前記小径部との間に形成され前記第2板に当接した段部と、前記小径部に設けられ前記ナットに螺合したねじ部と、を含み、
前記ナットと前記段部との間に、前記第2板が挟持され、
前記吊り下げ機構は、前記頭部と前記第1板との間に介在して前記第1板を前記第2板側に付勢する板ばねを含む、
ステアリングコラム装置。 - 請求項1に記載のステアリングコラム装置であって、
前記第1孔は、前記コラム移動方向とは直交する方向に離隔して一対設けられ、
前記第2孔は、前記コラム移動方向とは直交する方向に離隔して一対設けられ、
前記吊り下げボルトは、一対設けられて、対応する第1孔および対応する第2孔にそれぞれ挿通され、
前記板ばねは、一対設けられて、それぞれ対応する吊り下げボルトを挿通させた環状の皿ばねである。 - 請求項2に記載のステアリングコラム装置であって、
前記吊り下げ機構は、前記板ばねと前記第1板との間に介在した介在板を備え、
前記介在板と前記第1板の該介在板に対する摺動部とのうち少なくとも一方が、低摩擦材で構成されている。 - 請求項3に記載のステアリングコラム装置であって、
前記介在板は、前記一対の吊り下げボルトがそれぞれ挿通された一対の吊り下げ軸挿通孔を有し、前記コラム移動方向とは直交する方向に延びて前記一対の板ばねとしての皿ばねを受ける単一の長板である。
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2014
- 2014-01-29 US US14/759,312 patent/US9346482B2/en active Active
- 2014-01-29 WO PCT/JP2014/051923 patent/WO2014119607A1/ja active Application Filing
- 2014-01-29 EP EP14746254.3A patent/EP2952411B1/en not_active Not-in-force
- 2014-01-29 CN CN201480006593.0A patent/CN104955711B/zh not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
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US20150344064A1 (en) | 2015-12-03 |
EP2952411B1 (en) | 2017-01-04 |
JP5971725B2 (ja) | 2016-08-17 |
EP2952411A4 (en) | 2016-03-02 |
EP2952411A1 (en) | 2015-12-09 |
US9346482B2 (en) | 2016-05-24 |
CN104955711A (zh) | 2015-09-30 |
JP2014144747A (ja) | 2014-08-14 |
CN104955711B (zh) | 2017-04-26 |
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