JP2018030539A - Steering device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steering device which can increase an impact energy absorption amount while inhibiting increase of the number of components.SOLUTION: A steering device (10) has an energy absorption member (70) which contacts with an inner pipe (14) in a restriction mode to absorb impact energy. A fastening mechanism (50) includes a shaft member (51) which is provided so as to penetrate through a pair of leg parts (42) and rotate, and a cam member (60) is attached to the shaft member (51). The energy absorption member (70) which is pressed to the inner pipe (14) by the cam member (60) in the restriction mode is provided between the cam member (60) and the inner pipe (14). An excessive movement prevention member (22) is attached to the cam member (60) and thereby rotates with the shaft member (51) to face the inner pipe (14) in a movement mode and retreats from the inner pipe (14) in the restriction mode.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a steering device having a function of adjusting the position of a steering wheel in the front-rear direction and a function of absorbing impact energy at the time of a secondary collision.

  The vehicle is driven by drivers of various physiques. A steering device is known that can adjust the position of a steering wheel in the front-rear direction in accordance with the physique of each driver. As a conventional technique related to such a steering apparatus, there is a technique disclosed in Patent Document 1.

  The technique disclosed in Patent Document 1 will be described with reference to FIGS. 9 (a) and 9 (b). FIG. 9A corresponds to the movement mode disclosed in FIG. 6 of Patent Document 1 and indicated by a solid line. FIG. 9B corresponds to the restriction mode disclosed in FIG. 6 of Patent Document 1 and indicated by a broken line. The reference numerals are appropriately reassigned.

  Reference is made to FIG. As shown in Patent Document 1, the steering device 110 includes an outer column 140 and an inner pipe 114 that is held by the outer column 140 so as to be movable in the vehicle front-rear direction. The inner pipe 114 is switched by the fastening mechanism 150 between a movement mode in which movement in the vehicle front-rear direction is allowed and a restriction mode in which movement is restricted. The steering device 110 is in a movement mode in which the inner pipe 114 is movably provided.

  The fastening mechanism 150 includes an operation lever 152 that is rotatably provided. An over-movement prevention member 122 is attached to the operation lever 152 via a link mechanism 170. The excessive movement preventing member 122 protrudes inward from the opening 123 formed in the outer column 140 in the movement mode, and contacts the inner pipe 114 to prevent the inner pipe 114 from excessive movement. That is, when the inner pipe 114 moves to the position of the excessive movement preventing unit 122, the inner pipe 114 comes into contact with the excessive movement preventing unit 122 and is prevented from moving.

  Reference is made to FIG. FIG. 9B shows the steering device 110 in the restricted mode state. From the state shown in FIG. 9A, the movement mode can be switched to the restriction mode by rotating the operation lever 152 as shown by an arrow (see FIG. 9A).

  During the restriction mode, the movement of the inner pipe 114 is restricted by the fastening force of the fastening mechanism 150. The load generated at the time of the secondary collision is applied forward via the inner pipe 114 as indicated by the white arrow. At this time, the inner pipe 114 moves forward against the fastening force of the fastening mechanism 150, and the impact energy is absorbed by the frictional force generated between the inner pipe 114 and the outer column 140.

In the steering device 110 in the restriction mode, the over-travel prevention unit 122 has the outer column 140.
Retreating from the inside. Thereby, the inner pipe 114 does not contact the excessive movement prevention unit 122 at the time of a collision. The steering device 110 is provided with the overtravel prevention unit 12 during the restriction mode.
By retracting 2, stable impact energy can be absorbed.

  In such a steering apparatus, it is desirable that more impact energy can be absorbed while suppressing an increase in the number of parts.

JP 2005-1517 A

  An object of the present invention is to provide a steering device that can increase the amount of absorption of impact energy during a secondary collision while suppressing an increase in the number of parts.

According to the invention of claim 1, the outer column supported by the bracket, and the inner pipe held movably in the vehicle front-rear direction by the outer column,
The outer column has a pipe holding part that holds the outer periphery of the inner pipe, and a pair of legs that extend from both ends of the pipe holding part,
The pair of legs are fastened together by a fastening mechanism,
The inner pipe is switched between a movement mode in which movement in the vehicle longitudinal direction is allowed and a restriction mode in which movement is restricted by the fastening mechanism,
In the steering apparatus having an overtravel prevention member that faces a position overlapping the outer periphery of the inner pipe during the movement mode and that is separated from the inner pipe during the regulation mode,
An energy absorbing member that contacts the inner pipe in the restriction mode and absorbs impact energy when the inner pipe is displaced by applying an impact from behind the inner pipe;
The fastening mechanism includes a shaft member that is rotatably provided through the pair of legs.
A cam member is attached to this shaft member,
Between the cam member and the inner pipe, the energy absorbing member that is pressed against the inner pipe by the cam member in the restriction mode is provided,
The over-movement prevention member is attached to the cam member so as to rotate together with the shaft member, and faces the inner pipe in the movement mode, and retreats from the inner pipe in the regulation mode. An apparatus is provided.

According to claim 2, preferably, the energy absorbing member comprises an energy absorbing member main body part, and energy absorbing member side wall parts extending from left and right ends of the energy absorbing member main body part,
From the front-rear direction end portion of the energy absorbing member main body portion, an absorbing portion front wall portion and an absorbing portion rear wall portion are formed,
Each of the left and right side wall portions of the energy absorbing member is formed with an elliptical oval hole long in the vertical direction through which the shaft member is inserted,
With the rotation of the excessive movement preventing member, the energy absorbing member moves in the vertical direction, and in the restricting mode, the absorbing portion front wall portion and the absorbing portion rear wall portion come into contact with the inner pipe.

According to claim 3, preferably, a guide portion that guides the vertical movement of the energy absorbing member is formed on the inner surface of the pair of leg portions,
The guide portions are formed on both sides in the front-rear direction of the bolt insertion hole, and are protrusions protruding inward and long in the vertical direction.

  In the invention which concerns on Claim 1, the energy absorption member pressed against an inner pipe by the cam part at the time of a regulation mode is provided between the cam member and the inner pipe. When the shaft member is rotated, the cam member is also rotated, and the energy absorbing member is pressed against the inner pipe by the cam portion. For this reason, if the inner pipe is displaced due to an impact applied from the rear of the inner pipe during the regulation mode, the friction load between the inner pipe and the energy absorbing member is added to the sliding load between the inner pipe and the outer column, and the impact energy is reduced. Absorb. Thereby, the absorption amount of impact energy can be increased. The cam member in which the over-movement prevention part that restricts the telescopic adjustment range is formed can press the energy absorbing member against the inner pipe and increase the amount of absorbed shock absorption energy, thereby suppressing an increase in the number of parts. That is, according to the present invention, it is possible to increase the amount of absorption of impact energy while suppressing an increase in the number of parts.

  In the invention which concerns on Claim 2, an impact energy can be absorbed by the friction load with an inner pipe because the absorption part front wall part of an energy absorption member and the absorption part rear wall part contact an inner pipe. By changing the shape of the absorber front wall portion and the absorber rear wall portion, and the material and thickness of the energy absorbing member, the setting of the energy absorbing load can be easily changed.

  In the invention which concerns on Claim 3, rotation of an energy absorption member is prevented by a guide part at the time of switching to a movement mode and a control mode, and it can move smoothly up and down. Thereby, the energy absorbing member can be reliably separated from the inner pipe in the movement mode. In the restricting mode, the absorbing member can be reliably brought into contact with the inner pipe without being inclined, and a stable energy absorbing load can be obtained.

It is a left view of the steering device by Example 1 of this invention. FIG. 2 is a sectional view taken along line 2-2 of FIG. FIG. 3 is an exploded view of the switching mechanism shown in FIG. 2 as viewed from the left side. FIG. 4 is a left side view of the switching mechanism shown in FIG. 3. It is sectional drawing of a steering device at the time of a movement mode. It is a figure explaining the effect | action at the time of the movement mode of the steering apparatus shown by FIG. It is a figure explaining the effect | action at the time of the control mode of the steering apparatus shown by FIG. It is sectional drawing of the steering device by Example 2 of this invention. It is a figure explaining the basic composition of the conventional technology.

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the description, left and right refer to the left and right based on the vehicle occupant, and front and rear refer to the front and rear based on the traveling direction of the vehicle. In the figure, Fr indicates front, Rr indicates rear, Le indicates left when viewed from the occupant, Ri indicates right when viewed from the occupant, Up indicates top, and Dn indicates bottom.
<Example 1>

  Please refer to FIG. FIG. 1 shows the steering device 10 as viewed from the left side. The steering device 10 according to the present invention allows the occupant to adjust the position of the steering wheel in the vehicle front-rear direction (the left-right direction in the drawing) according to his / her physique. That is, the steering device 10 has a so-called telescopic function.

  Please refer to FIG. The steering device 10 includes a bracket 30 fixed to the vehicle body, an outer column 40 supported by the bracket 30, an inner pipe 14 held by the outer column 40 so as to be movable in the vehicle front-rear direction, and the inner pipe. 14, a steering shaft 15 to which a steering wheel can be attached at the rear end, a fastening mechanism 50 for restricting the movement of the inner pipe 14 in the front-rear direction, and a movement mode and a restriction mode provided in the fastening mechanism 50. And a switching mechanism 20 for switching.

  In the state shown in FIG. 2, the inner pipe 14 is restricted from moving in the front-rear direction. That is, FIG. 2 shows the steering device 10 in the restriction mode.

  The bracket 30 includes a vehicle body attachment portion 31 fixed to the vehicle body, and left and right outer column support portions 32 and 32 that are formed integrally with the left and right lower portions of the vehicle body attachment portion 31 and sandwich the outer column 40. It consists of.

  The outer column support portions 32 and 32 are respectively formed with long holes 34a and 34a for tilt adjustment. In the state shown in the figure, the outer column support portions 32 and 32 face each other substantially in parallel.

  The outer column 40 includes a pipe holding portion 41 that opens downward in a cross-sectional view along the vehicle width direction, and a pair of leg portions 42 and 42 that extend downward from each of the lower end portions of the pipe holding portion 41. ing. The pipe holding part 41 is disposed along the outer periphery of the inner pipe 14.

  Bolt insertion holes 42a and 42a are formed in the leg portions 42 and 42 substantially horizontally, respectively. In the state shown in FIG. 2, the side surfaces of the leg portions 42 and 42 are in contact with the inner side surfaces of the outer column support portions 32 and 32, respectively, and are close to each other by the outer column support portions 32 and 32. It is pinched.

  In addition, guide portions 48 and 48 for guiding the movement of the energy absorbing member 70 described later are formed on the inner side surfaces of the leg portions 42 and 42 of the outer column 40, respectively. The guide part 48 is a protrusion that protrudes inward from the leg parts 42 and 42 and extends in the vertical direction. The guide portions 48, 48 include a front side guide portion 48a and a rear side guide portion 48b formed on both sides of the bolt insertion holes 42a, 42a, respectively. The energy absorbing member side wall portion 72 of the energy absorbing member 70 is disposed between the front guide portion 48a and the rear guide portion 48b.

  In the fastening mechanism 50, an operation lever 52, a fastening cam 53, and a nut 56 are attached to a shaft member 51 that is inserted into the long holes 34a and 34a and the bolt insertion holes 42a and 42a and has a male screw at the tip. Become.

  The operation lever 52 is a component for rotating the shaft member 51 fixed to the end of the shaft member 51.

  The fastening cam 53 is a member for displacing the leg portion 42 in the direction of the axis C1 of the shaft member 51 when the shaft member 51 is rotated. The fastening cam 53 includes a movable cam 53a that is fixed to the shaft member 51 and can rotate with the shaft member 51, and a fixed cam 53b that contacts the movable cam 53a and cannot rotate.

  The shaft member 51 is formed by integrally forming an idling prevention portion 51b having a substantially square cross section at the center of a shaft member main body portion 51a which is a main body portion. The idling prevention unit 51b can rotate the switching mechanism 20 as the shaft member 51 rotates. The idling prevention unit 51b may have an oval shape having an oval shape in cross section. The switching mechanism 20 will be described in detail in the following drawings.

  Please refer to FIG. 3 and FIG. 3 and 4 show the switching mechanism 20 in the movement mode. The switching mechanism 20 includes a cam portion 61 attached to the idling prevention portion 51b of the shaft member 51, and an overtravel prevention portion 62 provided at a front portion of the cam portion 61 to prevent the inner pipe 14 from overtraveling. 60, an energy absorbing member 70 disposed on the upper surface of the cam member 60, and a fall preventing member 80 for preventing the cam member 60 and the energy absorbing member 70 from dropping from the shaft member 51.

  The cam member 60 is, for example, an integrally molded product made of resin. The cam member 60 has a substantially J shape and is locked to the idling prevention portion 51b, a cam claw portion 63 that protrudes from the cam portion 61 to the left and right and to which the fall prevention member 80 is locked, and the cam portion 61. And an excessive movement preventing portion 62 formed at the front portion. The excessive movement preventing part 62 has a buffer member attaching part 64 protruding toward the inner pipe 14. The buffer member 22 is mounted on the buffer member mounting portion 64. The buffer member 22 is formed from rubber having elasticity. Further, the buffer member 22 may be made of resin and integrally formed with the excessive movement preventing unit 62. In addition, the structure which does not provide the buffer member attaching part 64 and the buffer member 22 is also employable. In this case, the displacement of the inner pipe 14 is directly regulated by the excessive movement prevention unit 62.

  The cam portion 61 has a first contact surface 61a with which the energy absorbing member 70 contacts in the movement mode, and a second contact surface 61b with which the energy absorbing member 70 contacts in the restriction mode. A distance r1 from the axis C1 of the shaft member 51 to the first contact surface 61a is shorter than a distance r2 from the axis C1 of the shaft member 51 to the second contact surface 61b. That is, r1 <r2.

  The energy absorbing member 70 includes an energy absorbing member main body 71 disposed above the cam member 60, and left and right energy absorbing member side walls 72 lowered from the left and right ends of the energy absorbing member main body 71. It consists of.

  The energy absorbing member main body 71 is substantially U-shaped in a side view, and has an absorbing portion bottom 71a that contacts the upper surface of the cam member 60, and an absorbing portion front raised from the front end of the absorbing portion bottom 71a. It consists of a wall part 71b and an absorption part rear wall part 71c raised from the rear end part of the absorption part bottom part 71a. The upper end of the absorber front wall portion 71 b and the upper end of the absorber rear wall portion 71 c each have an arc shape along the lower surface of the inner pipe 14.

  The left and right energy absorbing member side walls 72 have oval holes 72a that are elongated in the vertical direction.

  The fall prevention member 80 is a member made of a metal plate that has a substantially U shape in a front view. The fall prevention member 80 includes a fall prevention member bottom portion 81 and fall prevention member side wall portions 82 raised from the left and right ends of the fall prevention member bottom portion 81.

  The fall prevention member side wall portion 82 has a substantially U-shape that opens upward, and projecting portions 82a and 82a projecting inward are formed at the upper end. The protrusions 82a and 82a have a substantially semicircular shape.

  Please refer to FIG. 2 and FIG. The attachment of the switching mechanism 20 to the shaft member 51 will be described. Prior to the shaft member 51 being inserted into the leg portions 42, 42, the cam member 60 to which the buffer member 22 is attached and the energy absorbing member 70 are caused to face between the leg portions 42, 42. In this state, the shaft member 51 is inserted.

  Please refer to FIG. The cam portion 61 is locked to the idling prevention portion 51 b of the inserted shaft member 51, and the fall preventing member 80 is attached to the idling prevention portion 51 b and the cam claw portion 63. After the attachment, the projecting portions 82 a and 82 a are caught on the upper surfaces of the idling prevention portion 51 b and the cam claw portion 63.

  An inner pipe hole 14 a is formed in the lower surface of the inner pipe 14 along the axial direction. The axial length of the inner pipe hole 14 a is a length that can move in the front-rear direction of the inner pipe 14. In addition, it may replace with the inner pipe hole part 14a, and it is good also as a recessed part dented upwards.

  Please refer to FIG. When the inner pipe 14 is moved in the front-rear direction, the steering device 10 needs to be changed to the movement mode. In order to change to the movement mode, the operating lever 52 is rotated downward as indicated by the arrow (1).

  Please refer to FIG. By rotating the operation lever 52, the shaft member 51 rotates, and the movable cam 53a also rotates together with the shaft member 51. At this time, the fixed cam 53b does not rotate. Concave and convex shapes are continuously formed on the opposing surfaces of the movable cam 53a and the fixed cam 53b, respectively. The movable cam 53a is pressed against the movable cam 53a side by the leg portion.

  Please refer to FIG. When the fixed cam 53b is used as a reference, the gap α between the movable cam 53a and the movable cam 53a can be narrowed by displacing the uneven shape of the movable cam 53a. By narrowing the gap α, the gap β1 between the leg portions 42 and 42 can be widened. That is, the distance β1 between the leg portions 42 and 42 in the restriction mode <the distance β2 between the leg portions 42 and 42 in the movement mode. Thereby, the holding force of the inner pipe 14 in the pipe holding portion 41 is reduced, and the switching from the restriction mode to the movement mode is completed. By reducing the holding force of the inner pipe 14, the inner pipe 14 can be displaced in the front-rear direction.

  When the shaft member 51 is rotated when switching from the restriction mode to the movement mode, the cam member 60 of the switching mechanism 20 attached to the idling prevention unit 51b rotates.

  Please refer to FIG. FIG. 6 shows the switching mechanism 20 in the movement mode. In the movement mode, the buffer member 22 attached to the over-movement preventing portion 62 of the cam member 60 faces the inner pipe hole portion 14 a formed in the lower surface of the inner pipe 14.

  As indicated by the arrows, in the movement mode, the inner pipe 14 can be displaced in the vehicle front-rear direction. At this time, when the inner pipe 14 moves to the buffer member 22, the inner pipe 14 comes into contact with the buffer member 22 and stops. That is, the cam member 60 is a member that prevents the inner pipe 14 from moving beyond a predetermined region. The buffer member 22 is a buffer member formed of resin, rubber, or the like, and prevents an impact or abnormal noise when coming into contact with the end of the inner pipe hole 14a. Further, in the movement mode, the energy absorbing member 70 contacts the first contact surface 61a of the cam member 61 and is separated from the inner pipe 14, so that the telescopic operation is not hindered.

  Please refer to FIG. When the shaft member 51 is rotated when switching from the movement mode to the restriction mode, the buffer member 22 attached to the excessive movement prevention unit 62 is separated from the inner pipe 14.

  In addition, the first contact surface 61a with which the energy absorbing member 70 is in contact in the movement mode has a distance r1 from the axis C1 of the shaft member 51, and the energy absorbing member 70 is in contact in the restriction mode. The distance between the second contact surface 61b and the shaft member 51 from the axis C1 is r2. And r1 <r2. For this reason, when the shaft member 51 is rotated when switching from the movement mode to the restriction mode, the energy absorbing member 70 is lifted and contacts the inner pipe 14. The energy absorbing member side wall portion 72 of the energy absorbing member 70 is disposed between a front side guide portion 48a formed on the outer column 40 and a rear side guide portion 48b. As a result, the energy absorbing member 70 can move in the vertical direction as the shaft member 51 rotates without rotating. The operation of the steering device 10 during the restriction mode will be described.

  Please refer to FIG. At the time of the secondary collision, the inner pipe 14 moves forward (displaces to the left in the drawing) against the fastening force of the fastening mechanism 50. A part of the impact energy is absorbed by the pipe holding part 41.

  Please refer to FIG. The steering device 10 during driving is set to the restriction mode. In the restriction mode, the energy absorbing member 70 is in contact with the inner pipe 14. When the inner pipe 14 moves forward in this state, impact energy can be further absorbed by the frictional load between the inner pipe 14 and the energy absorbing member 70.

  The front end of the energy absorbing member 70 is formed in an arc shape along the outer shape of the inner pipe 14, and both end portions of the arc contact each other from both sides in the width direction so as to straddle the inner pipe hole portion 14a. At the time of the secondary collision, the inner pipe 14 moves forward while the inner pipe 14 and both ends of the arc of the energy absorbing member 70 are in contact with each other. By this frictional load, the collision energy at the time of the secondary collision can be reliably absorbed. Moreover, it is good also as a structure which absorbs the collision energy at the time of a secondary collision by scraping the width direction both sides of the inner pipe hole part 14a by the energy absorption member 70. FIG.

  During the restriction mode, the buffer member 22 attached to the overtravel prevention unit 62 does not face the inner pipe hole 14a. That is, even if the inner pipe 14 moves forward at the time of the secondary collision, the inner pipe 14 and the buffer member 22 do not contact each other. Therefore, it is possible to absorb impact energy with a constant load without generating a load in which the inner pipe 14 and the excessive movement preventing portion 62 abut. In addition, a constant energy absorption load can be generated stably regardless of the position of the inner pipe 14 in the front-rear direction.

  According to the present invention described above, the following effects can be obtained.

  Please refer to FIG. An energy absorbing member 70 is provided between the cam member 60 and the inner pipe 14 so as to be pressed against the inner pipe 14 by the cam portion 61 in the restriction mode. When the shaft member 51 is rotated, the cam member 60 is also rotated, and the energy absorbing member 70 is pressed against the inner pipe 14 by the cam portion 61. For this reason, when the inner pipe 14 is displaced by applying an impact from behind the inner pipe 14 during the regulation mode, the impact energy can be absorbed. Thereby, the absorption amount of impact energy can be increased. Here, the buffer member 22 is attached to the excessive movement preventing unit 62. That is, the energy absorbing member 70 can be pressed against the inner pipe 14 using the cam member 60 in which the over-movement preventing portion 62 is formed, and the amount of shock absorption energy absorbed can be increased. . That is, according to the present invention, it is possible to increase the amount of absorption of impact energy while suppressing an increase in the number of parts.

  When the absorbing portion front wall portion 71b and the absorbing portion rear wall portion 71c of the energy absorbing member 70 are in contact with the inner pipe 14, impact energy can be absorbed by a frictional load with the inner pipe 14. By changing the shape of the absorber front wall portion 71b and the absorber rear wall portion 71c and the material and plate thickness of the energy absorber 70, the setting of the energy absorption load can be easily changed.

  At the time of switching between the movement mode and the regulation mode, the guide member 48 prevents the energy absorbing member 70 from rotating and can smoothly move in the vertical direction. Thereby, the energy absorbing member 70 can be reliably separated from the inner pipe 14 in the movement mode. In the restricting mode, the absorbing member can be reliably brought into contact with the inner pipe 14 without tilting, and a stable energy absorbing load can be obtained.

Furthermore, the cam part 61 is attached to the idling prevention part 51b which is formed in a part of the shaft member 51 and has a substantially square shape in a cross-sectional view perpendicular to the axis C1. Thereby, the idling of the shaft member 51 can be prevented, and the excessive movement preventing member 60 can be operated reliably. The idling prevention unit 51b is not limited to a square shape, and may be a polygon, a star, or the like. That is, any shape that prevents the shaft member 51 from idling may be used.
<Example 2>

Next, a second embodiment of the present invention will be described with reference to the drawings.
FIG. 8 shows a cross-sectional configuration of the steering device of the second embodiment, corresponding to FIG. In contrast to the steering apparatus according to the first embodiment, the switching mechanism 20A is changed in the steering apparatus 10A according to the second embodiment. Other basic configurations are common to the steering apparatus according to the first embodiment. About the part which is common in Example 1, while using a code | symbol, detailed description is abbreviate | omitted.

  FIG. 8 (a) shows the steering device 10A in the movement mode state. FIG. 8B shows the steering device 10A in the restricted mode state.

  The leg portion 42A of the outer column 40A is formed with a first guide portion 48A for guiding the energy absorbing member 70A and a second guide portion 49A for guiding the buffer member 22A.

  The buffer member 22A and the cam member 60A are formed with receiving portions 22Aa and 60Aa for receiving the end portions of the springs 91, respectively. The cam member 60 has a push-down portion 65A that can push down the buffer member 22A.

  The shaft member 51A has an idling prevention portion 51Ab having a substantially square cross section at a substantially center. The cam portion 61 of the cam member 60A is attached to this portion.

  When the movement mode (FIG. 8A) is changed to the restriction mode (FIG. 8B), the cam member 60A is rotated by rotating the shaft member 51A, and the push-down portion 65A pushes down the buffer member 22. . Thereby, the buffer member 22 </ b> A is separated from the inner pipe 14. On the other hand, the energy absorbing member 70 </ b> A is pushed up by the cam member 60 </ b> A and contacts the inner pipe 14.

  When changing from the regulation mode (FIG. 8B) to the movement mode (FIG. 8A), the buffer member 22A is raised by the biasing force of the spring 91 as the cam member 60A rotates. Thereby, the upper end of the buffer member 22 </ b> A faces the inner pipe hole portion 14 a of the inner pipe 14. At this time, the energy absorbing member 70A is separated from the inner pipe 14 by rotating the cam member 60A.

  Even in such a steering apparatus 10A, a predetermined effect of the present invention can be obtained.

  In addition, as long as there exists an effect | action and effect of this invention, this invention is not limited to an Example.

  The steering device of the present invention is suitable for use in a steering system of a passenger car.

DESCRIPTION OF SYMBOLS 10,10A ... Steering device 14 ... Inner pipe 22, 22A ... Buffer member 30 ... Bracket 40, 40A ... Outer column 41 ... Pipe holding part 42, 42A ... Leg part 50 ... Fastening mechanism 51, 51A ... Shaft member 60, 60A ... Cam member 70, 70A ... energy absorbing member

Claims (3)

An outer column supported by the bracket, and an inner pipe held movably in the vehicle front-rear direction by the outer column,
The outer column has a pipe holding part that holds the outer periphery of the inner pipe, and a pair of legs that extend from both ends of the pipe holding part,
The pair of legs are fastened together by a fastening mechanism,
In the steering device in which the inner pipe is switched between a movement mode in which movement in the vehicle longitudinal direction is allowed and a restriction mode in which movement is restricted by the fastening mechanism.
The fastening mechanism includes a shaft member that passes through a bolt insertion hole formed in the pair of leg portions and has an idling prevention portion at a substantially center.
A cam portion mounted on the idling prevention portion, an over-movement prevention portion that rotates together with the shaft member, faces an outer periphery of the inner pipe in the movement mode, and separates from the inner pipe in the restriction mode; A cam member having
An energy absorbing member that is provided between the cam member and the inner pipe, contacts the inner pipe in the restriction mode, and absorbs impact energy at the time of a secondary collision;
The energy absorbing member is pressed against the inner pipe by the cam portion in the restriction mode. The energy absorbing member comprises an energy absorbing member main body part, and energy absorbing member side wall parts extending from left and right ends of the energy absorbing member main body part,
From the front-rear direction end portion of the energy absorbing member main body portion, an absorbing portion front wall portion and an absorbing portion rear wall portion are formed,
Each of the left and right side wall portions of the energy absorbing member is formed with an elliptical oval hole long in the vertical direction through which the shaft member is inserted,
The energy absorbing member moves in the vertical direction along with the rotation of the excessive movement preventing member, and the front wall portion of the absorbing portion and the rear wall portion of the absorbing portion are in contact with the inner pipe in the restriction mode. The steering apparatus according to claim 1. A guide portion that guides the vertical movement of the energy absorbing member is formed on the inner side surfaces of the pair of leg portions,
The steering device according to claim 1 or 2, wherein the guide portions are formed on both sides of the bolt insertion hole in the front-rear direction, and are projecting inward and long in the vertical direction.

Images