WO2014174727A1 - ステアリング装置 - Google Patents
ステアリング装置 Download PDFInfo
- Publication number
- WO2014174727A1 WO2014174727A1 PCT/JP2013/084302 JP2013084302W WO2014174727A1 WO 2014174727 A1 WO2014174727 A1 WO 2014174727A1 JP 2013084302 W JP2013084302 W JP 2013084302W WO 2014174727 A1 WO2014174727 A1 WO 2014174727A1
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- WIPO (PCT)
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- steering column
- steering
- operation lever
- cam
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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
- B62D1/184—Mechanisms for locking columns at selected positions
-
- 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
- B62D1/187—Steering columns yieldable or adjustable, e.g. tiltable with tilt adjustment; with tilt and axial adjustment
- B62D1/189—Steering columns yieldable or adjustable, e.g. tiltable with tilt adjustment; with tilt and axial adjustment the entire column being tiltable as a unit
Definitions
- the present invention relates to a steering device mounted on a vehicle and capable of adjusting the position of a steering wheel by releasing the fixation of a steering column by lever operation.
- a steering device provided with an operation lever that switches between fixing and releasing a steering column by swinging in order to make it possible to adjust the tilt position and telescopic position of the steering wheel according to the physique of the driver.
- the operating lever releases the fixing of the steering column due to the impact load and the inertia moment of the operating portion of the lever.
- the steering column may be unlocked.
- a spring that urges the operation lever toward the fixed side while the steering column is fixed is provided to prevent the operation lever from swinging toward the side where the steering column is released (for example, (See JP 2008-285064 A).
- the operation lever is prevented from swinging to the release side by a constant tensile force by the spring, so that the tensile force of the spring is exceeded by a collision of a vehicle equipped with the steering device.
- the steering column may be unfixed.
- the present invention has been made paying attention to the above problems, and an object of the present invention is to provide a steering device that prevents the steering column from being released due to an impact load.
- a steering shaft for transmitting a steering force A steering column that pivotally supports the steering shaft; A vehicle body side bracket for supporting the steering column on the vehicle body; A fixing mechanism for fixing and releasing the position of the steering column; An operation lever attached to the fixing mechanism and switching the position fixing and release of the steering column by swinging;
- the operation lever includes an operation portion disposed on the vehicle rear side with respect to the swing center of the operation lever, and an extension portion extending to the vehicle front side with respect to the swing center of the operation lever and having a weight.
- the extension portion prevents the operation lever from swinging in the release direction from the state where the steering column is fixed. That is, the center of gravity of the operation lever can be brought close to the swing center of the operation lever by the extension portion and the weight. Thereby, the moment in the swinging direction due to the weight of the operating portion of the operating lever that receives the impact at the time of collision is reduced. In other words, when a moment is generated that causes the operation lever portion on the vehicle rear side of the swing center to swing to the release side, the extension portion and the weight are reversely rotated against the moment. Create a moment.
- the “operation unit” refers to a part used by the driver to swing the operation lever.
- a portion of the operation lever on the vehicle rear side with respect to the swing center is made of a plate material and has a curved portion.
- the weight is heavier than the weight with which the operation lever can be balanced around the fastening bolt.
- the weight and the extending portion are aligned with a horizontal distance in the vehicle front-rear direction from the center axis of the tightening bolt to the center of gravity of the weight and the extending portion.
- the value obtained by multiplying the weight by the weight of the operation lever on the vehicle rear side is the horizontal distance in the vehicle front-rear direction from the center axis of the tightening bolt to the center of gravity of the operation lever portion on the vehicle rear side. It should be larger than the value obtained by multiplication.
- the vehicle body side bracket includes a pair of projecting portions extending from above the steering column to both sides in the vehicle width direction of the steering column
- the fixing mechanism includes a tightening bolt that passes through the pair of overhang portions, an annular movable cam that is externally fitted to the tightening bolt and rotates by swinging the operation lever, and an external fit to the tightening bolt.
- an annular fixed cam fixed to the projecting portion so as to face the movable cam, and the distance between the movable cam and the fixed cam is changed by the rotation of the movable cam so as to change the steering column or the steering column.
- a cam fastening mechanism that switches between fixing and releasing the position by fastening and releasing a member fixed to
- the movable cam and the fixed cam each protrude to a side facing each other, and are arranged at positions where they are opposed to each other when the position is fixed, and the top and the other parts extending from the top substantially in the circumferential direction.
- an inclined portion that is disposed at a position that is in sliding contact with each other at the time of switching between the position fixing and the release, The inclined portion is assumed to have a lower inclination angle larger than an inclination angle near the top.
- the lower part having a large inclination angle releases the fixing of the steering column, and when the operation lever tries to swing to the position fixing side due to the weight of the weight, it abuts on the protrusion of the movable cam, Prevent further swinging.
- the “lower part” refers to a part of the inclined part that is far from the top part.
- the operation lever is entirely made of resin.
- the adjustment of the position of the steering column is an adjustment of the tilt position.
- FIG. 1 is a side view of a steering apparatus according to an embodiment of the present application.
- FIG. 2 is an enlarged sectional view showing a cam fastening mechanism of the steering device according to the embodiment of the present application.
- 3A and 3B are views showing a cam of the steering device according to the embodiment of the present application.
- FIG. 3A shows a plane of the fixed cam
- FIG. 3B shows an enlarged cross section of a contact portion between the fixed cam and the movable cam.
- FIG. 1 is a side view showing a steering apparatus according to an embodiment of the present application.
- the steering column and a part of the steering shaft are shown in cross section.
- the steering device 1 is mainly made of metal, and transmits rotation of a steering wheel (not shown) separately attached to an end portion on the vehicle rear side (right side as viewed in FIG. 1) to the vehicle front side (left side as viewed in FIG. 1).
- It has a tightening mechanism 5 and a front bracket 6 that swingably attaches the vehicle front side of the steering column 3 to the vehicle body, and is configured to be able to adjust the tilt position.
- the rear bracket 4 has a pair of overhang portions 4a and 4b (4b is not shown in FIG. 1) extending from above the steering column 3 to both sides of the steering column 3 in the vehicle width direction.
- long holes extending in the tilt direction are formed at opposing positions.
- a fastening bolt 7 constituting the cam fastening mechanism 5 is inserted into the long hole.
- the tilt lever 9 (operating lever) is configured to swing around the tightening bolt 7.
- the steering column 3 is fixed and released by the driver operating the lever knob 8 (operating unit). This is done by swinging the tilt lever 9.
- the lever knob 8 When the lever knob 8 is pushed down, the fixing of the steering column 3 is released, and when the lever knob 8 is pulled up, the steering column 3 is fixed.
- a tilt lever 9 indicated by a solid line indicates a state in which the steering column 3 is fixed
- a tilt lever 9 indicated by a two-dot chain line indicates a state in which the steering column 3 is unlocked. Yes.
- the vehicle front side portion of the tilt lever 9 is made of a plate material whose plane is arranged substantially perpendicular to the vehicle width direction, has a through hole, and the tightening bolt 7 is inserted through the through hole.
- An extending portion 9b is formed on the vehicle front side of the fastening bolt 7, and a columnar weight 10 is provided on the vehicle left side (front side in FIG. 1) of the vehicle front side end portion of the extending portion 9b. It is attached.
- a resin other than a metal such as iron or steel may be used, or the weight 10 may be formed of an integral resin together with the tilt lever 9. The weight 10 is heavier than the weight at which the tilt lever 9 can be balanced about the fastening bolt 7.
- the vehicle rear side portion of the tilt lever 9 is bent in an L shape on the vehicle rear side with respect to the fastening bolt 7, and is wide in the vehicle width direction and extends rearward of the vehicle.
- a resin lever knob 8 is attached to an end portion on the rear side of the vehicle, and a curved portion 9 a that is curved upward is formed adjacent to the lever knob 8.
- the curved portion 9a is a portion for providing a tool space for attaching a key lock. As a result, the distance between the swing center of the tilt lever 9 and the lever knob 8 is long.
- FIG. 2 is an enlarged sectional view showing the cam fastening mechanism 5 of the steering device 1 according to the embodiment of the present application.
- FIG. 2 shows a 2-2 cut surface shown in FIG. 1.
- the distance bracket 11 is fixed to the lower part of the steering column 3.
- the distance bracket 11 is formed with a through hole penetrating in the vehicle width direction, and the tightening bolt 7 is inserted through the through hole.
- the distance bracket 11 slides in contact with the overhang portions 4a and 4b and moves up and down together with the steering column 3 and the tightening bolt 7 in a state where the fixation of the steering column 3 is released.
- the distance bracket 11 is sandwiched by the overhang portions 4 a and 4 b and supports the steering column 3 to the rear side bracket 4.
- a nut 12 is screwed onto the tip of the tightening bolt 7, and the distance bracket 11, the overhang portions 4 a and 4 b, and the tilt lever 9 are disposed between the head of the tightening bolt 7 and the nut 12. . Further, a fixed cam 13 and a movable cam 14 that are externally fitted to the tightening bolt 7 are interposed between the tilt lever 9 and the overhanging portion 4a.
- a rectangular locking portion 13a (see FIG. 3A) is formed on the overhanging portion 4a side of the fixed cam 13, and the locking portion 13a is inserted into a long hole formed in the overhanging portion 4a. Yes.
- the fixed cam 13 allows the tightening bolt 7 to be moved while allowing movement in the tilt direction. It is configured not to rotate around the center.
- the movable cam 14 also has a rectangular locking portion (not shown) on the tilt lever 9 side, and is configured to be rotatable together with the tilt lever 9.
- 3A and 3B are views showing the fixed cam 13 of the steering device 1 according to the embodiment of the present application.
- 3A shows a plane of the fixed cam 13 on the movable cam 14 side
- FIG. 3B shows an enlarged cross section of a contact portion between the fixed cam 13 and the movable cam 14.
- the locking portion 13a described above is formed on the overhanging portion 4a side of the fixed cam 13 (the back side of the plane shown in FIG. 3A).
- a central hole 13 b through which the fastening bolt 7 is passed is formed in the center of the fixed cam 13.
- a portion 13d is provided.
- the inclined portion 13d connects the top portion of the protruding portion 13c and the surface on the movable cam 14 side where the protruding portion 13c is not formed with an inclined surface.
- stoppers 13e for restricting the fixed cam 13 and the movable cam 14 from rotating relative to each other at a certain angle protrude from the movable cam 14 side at four locations at equal intervals in the circumferential direction. Is formed.
- the stopper 13e regulates relative rotation by contacting a similar stopper formed on the movable cam 14.
- the movable cam 14 has the same shape as the fixed cam 13, and is arranged with the side on which the protrusion is formed facing each other.
- FIG. 3B shows an enlarged cross section of the contact portion between the fixed cam 13 and the movable cam 14 at an intermediate position between fixing and releasing the steering column 3.
- the inclined portions of the fixed cam 13 and the movable cam 14 are in contact with each other. From this state, when the tilt lever 9 is operated to the fixed side, the movable cam 14 moves to the right toward FIG. 3B. At the same time, the inclined surfaces slide upward to move upward, the protrusions face each other, and stop at a position where the stoppers abut.
- the weight 10 is heavier than the weight at which the tilt lever 9 can be balanced with the tightening bolt 7 as the center, when the driver releases the fixation of the steering column 3 and adjusts the tilt position, It is conceivable that the lever 9 swings to the fixed side and inhibits the adjustment of the tilt position. Therefore, by making the lower portion 13d1 of the inclined portion 13d have a larger inclination angle than the portion near the top of the protruding portion 13c, the movable cam 14 is difficult to ride on the protruding portion 13c of the fixed cam 13, and the steering column 3 is fixed. The tilt lever 9 is difficult to swing to the fixed side when released.
- the following effects can be obtained. That is, steering is performed when a vehicle traveling with the steering column 3 fixed collides with another vehicle or the like (primary collision), or when the driver collides with the steering wheel (secondary collision) at the time of the primary collision.
- the device 1 receives a large impact, and the tilt lever 9 may receive a force that swings toward the side where the tilt is released.
- the extension portion 9b and the weight 10 are opposed to fix the steering column 3. Can be prevented.
- the inertial moment of the tilt lever 9 portion on the lever knob 8 side (vehicle rear side) with respect to the tightening bolt 7 causes the tightening bolt 7 to be the center.
- a force for swinging the tilt lever 9 in the clockwise direction is applied, and at the same time, a force for swinging the tilt lever 9 in the counterclockwise direction around the tightening bolt 7 due to the inertia moment of the extending portion 9b and the weight 10 is applied. Therefore, it is possible to prevent the steering column 3 from being released.
- the weight 10 is heavier than the weight at which the tilt lever 9 can be balanced about the tightening bolt 7. In general, it is difficult to predict the magnitude of the impact load. This is because the moment of inertia of 10 is increased so that the fixation of the steering column 3 is less likely to be released and is safe.
- the tilt adjustment can be fixed and released with a light operation feeling, but the inertia moment around the rotation of the tightening bolt 7 increases, and the impact of the steering column 3 is increased by the impact. Fixing is easy to be released. Further, when the tilt lever 9 has the curved portion 9a as in the present embodiment, the curved portion 9a tends to generate a leaf spring action, and the steering column 3 is easily released from being fixed by vibration. Therefore, these cases are particularly effective.
- the tilt device can also be used for a steering device capable of adjusting the telescopic position by swinging the tilt lever. It can also be used in a steering device that can adjust both the tilt position and the telescopic position by swinging the lever.
- the weight of the extension part may be formed integrally with the extension part, and the shape is not limited to the cylindrical shape.
- the center of gravity of the weight and the extending portion is preferably arranged at a position that is line-symmetric with respect to the center of gravity of the tilt lever portion on the vehicle rear side with respect to the center axis of the tightening bolt and the center axis of the tightening bolt.
- the rear bracket with the tilt lever needs to secure the tool space of the vehicle body mounting part, and is not limited to this because it is restricted by the support rigidity, meter visibility, and space in the height direction due to securing the knee space.
- the position can be determined in consideration of interference with other parts and space, and the shape of the extending portion can be changed accordingly.
- the weight may be a weight that can balance the tilt lever around the tightening bolt, or may be lighter than a weight that can be balanced. Even if the weight is lighter than the weight that can be balanced, there are other forces that prevent the tilt lever from swinging, such as the friction between the cams and the friction between the tilt lever and the washer placed on the bolt head side. It is possible to prevent the steering column from being released by being compensated by these forces.
- the fixing and releasing of the steering column is not limited to the cam tightening mechanism that switches between the movable cam and the fixed cam as long as the lever is swung.
- the driver tightens the screw by swinging the tilt lever.
- the steering column may be fixed and released by loosening, or other known fixing mechanisms may be used.
- the tilt lever can adopt various shapes and may not have a curved portion.
- the direction of operation of the tilt lever may be such that the steering column is released when operated upward and the steering column is fixed when operated downward.
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Abstract
Description
該ステアリングシャフトを軸支するステアリングコラムと、
該ステアリングコラムを車体に支持する車体側ブラケットと、
前記ステアリングコラムの位置固定及び解除をする固定機構と、
該固定機構に取り付けられ、前記ステアリングコラムの位置固定及び解除を揺動によって切り替える操作レバーと、を有し、
前記ステアリングコラムの位置を調整可能なステアリング装置において、
前記操作レバーは、該操作レバーの揺動中心よりも車両後方側に配置された操作部と、前記操作レバーの揺動中心よりも車両前方側へ延び、重りを具備した延在部とを備えるものとする。
前記固定機構は、前記一対の張出部を貫通した締付ボルトと、該締付ボルトに外嵌し前記操作レバーの揺動によって回転する円環状の可動カムと、前記締付ボルトに外嵌し該可動カムに対向して前記張出部に固設された円環状の固定カムとを備え、前記可動カムの回転によって前記可動カムと前記固定カムの距離を変化させ、ステアリングコラム又はステアリングコラムに固設された部材を締め付け、解放することにより前記位置固定及び解除を切り替えるカム締付機構であり、
前記可動カムと前記固定カムとは、それぞれ、互いに対向する側に突出し、前記位置固定時に互いに対向接触する位置に配置された頂部と、該頂部から略周方向に延びて前記頂部と他の部分とを傾斜面でつなぎ、前記位置固定と解除との切り替え時に互いに摺接する位置に配置された傾斜部と、を具備する突部を備え、
前記傾斜部は、前記頂部付近の傾斜角よりも下部の傾斜角の方が大きいものとする。
Claims (6)
- 操舵力を伝達するステアリングシャフトと、
該ステアリングシャフトを軸支するステアリングコラムと、
該ステアリングコラムを車体に支持する車体側ブラケットと、
前記ステアリングコラムの位置固定及び解除をする固定機構と、
該固定機構に取り付けられ、前記ステアリングコラムの位置固定及び解除を揺動によって切り替える操作レバーと、を有し、
前記ステアリングコラムの位置を調整可能なステアリング装置において、
前記操作レバーは、該操作レバーの揺動中心よりも車両後方側に配置された操作部と、前記操作レバーの揺動中心よりも車両前方側へ延び、重りを具備した延在部とを備えることを特徴とするステアリング装置。 - 前記操作レバーのうち揺動中心よりも車両後方側の部分は、板材から成り、湾曲部を有することを特徴とする請求項1に記載のステアリング装置。
- 前記重りは、前記締付ボルトを中心として前記操作レバーの釣り合いが取れる重さよりも重いことを特徴とする請求項1に記載のステアリング装置。
- 前記車体側ブラケットは、前記ステアリングコラムの上方から前記ステアリングコラムの車幅方向の両側に延在する一対の張出部を備え、
前記固定機構は、前記一対の張出部を貫通した締付ボルトと、該締付ボルトに外嵌し前記操作レバーの揺動によって回転する円環状の可動カムと、前記締付ボルトに外嵌し該可動カムに対向して前記張出部に固設された円環状の固定カムとを備え、前記可動カムの回転によって前記可動カムと前記固定カムの距離を変化させ、ステアリングコラム又はステアリングコラムに固設された部材を締め付け、解放することにより前記位置固定及び解除を切り替えるカム締付機構であり、
前記可動カムと前記固定カムとは、それぞれ、互いに対向する側に突出し、前記位置固定時に互いに対向接触する位置に配置された頂部と、該頂部から略周方向に延びて前記頂部と他の部分とを傾斜面でつなぎ、前記位置固定と解除との切り替え時に互いに摺接する位置に配置された傾斜部と、を具備する突部を備え、
前記傾斜部は、前記頂部付近の傾斜角よりも下部の傾斜角の方が大きいことを特徴とする請求項1に記載のステアリング装置。 - 前記操作レバーは、全体が樹脂から形成されていることを特徴とする請求項1に記載のステアリング装置。
- 前記ステアリングコラムの位置の調整は、チルト位置の調整であることを特徴とする請求項1に記載のステアリング装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13883331.4A EP2937264B1 (en) | 2013-04-24 | 2013-12-20 | Steering device |
US14/347,638 US9352769B2 (en) | 2013-04-24 | 2013-12-20 | Steering apparatus |
JP2014511628A JP5783327B2 (ja) | 2013-04-24 | 2013-12-20 | ステアリング装置 |
CN201380003359.8A CN104245475B (zh) | 2013-04-24 | 2013-12-20 | 转向装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2013091338 | 2013-04-24 | ||
JP2013-091338 | 2013-04-24 |
Publications (1)
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WO2014174727A1 true WO2014174727A1 (ja) | 2014-10-30 |
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PCT/JP2013/084302 WO2014174727A1 (ja) | 2013-04-24 | 2013-12-20 | ステアリング装置 |
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US (1) | US9352769B2 (ja) |
EP (1) | EP2937264B1 (ja) |
JP (1) | JP5783327B2 (ja) |
CN (1) | CN104245475B (ja) |
WO (1) | WO2014174727A1 (ja) |
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JP7327093B2 (ja) * | 2019-11-12 | 2023-08-16 | 日本精工株式会社 | ステアリング装置 |
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- 2013-12-20 WO PCT/JP2013/084302 patent/WO2014174727A1/ja active Application Filing
- 2013-12-20 JP JP2014511628A patent/JP5783327B2/ja active Active
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Also Published As
Publication number | Publication date |
---|---|
EP2937264B1 (en) | 2017-04-26 |
CN104245475A (zh) | 2014-12-24 |
US9352769B2 (en) | 2016-05-31 |
CN104245475B (zh) | 2016-08-31 |
JPWO2014174727A1 (ja) | 2017-02-23 |
EP2937264A1 (en) | 2015-10-28 |
US20150291203A1 (en) | 2015-10-15 |
EP2937264A4 (en) | 2016-03-09 |
JP5783327B2 (ja) | 2015-09-24 |
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