WO2023119634A1

WO2023119634A1 - Steering device

Info

Publication number: WO2023119634A1
Application number: PCT/JP2021/048246
Authority: WO
Inventors: 邦洋岡; 良一時岡
Original assignee: 株式会社ジェイテクト
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2023-06-29

Abstract

A steering device (1) is provided with: a steering input shaft (3) having attached thereto a steering member (2); a movable part (4) that has attached thereto the steering input shaft (3) and that is capable of reciprocating in the front-rear direction of a vehicle (100); a holding part (5) that reciprocally holds the movable part (4); and a support part (6) that supports one end (51) of the holding part (5) at the front side of the vehicle (100) and presses the one end (51) downwardly upon collision of the vehicle (100). In the holding part (5), a portion rearwardly separated from the one end (51) is rotatably supported on the vehicle (100).

Description

steering device

This invention relates to a steering device.

　Conventionally, there is known a steering device having a telescoping column portion that is slidable with respect to a column housing that is fixed to a vehicle (see Patent Document 1).

WO2019/005736

By the way, if the dash panel deforms due to a vehicle collision or the like, this deformation causes the column housing to move backward and push the steering device backward. As a result, the steering device may interfere with the driver (secondary collision).

Therefore, an object of the present invention is to provide a steering device capable of suppressing the occurrence of secondary collisions.

In order to solve the above problems, a steering device according to an aspect of the present invention includes a steering input shaft to which a steering member is attached; a holding portion that holds the movable portion so as to be able to reciprocate; and a support portion that supports one end portion of the holding portion on the front side of the vehicle and pushes the one end portion downward when the vehicle collides. A portion of the holding portion rearwardly away from the one end portion is rotatably supported by the vehicle.

According to the present invention, it is possible to provide a steering device capable of suppressing the occurrence of secondary collisions.

FIG. 1 is a partial cross-sectional view showing part of the schematic configuration of the vehicle according to the embodiment. FIG. 2 is a schematic diagram showing an enlarged part of the support portion according to the embodiment. FIG. 3 is a partial cross-sectional view showing a state of the vehicle after collision according to the embodiment. FIG. 4 is a partial cross-sectional view of a vehicle showing a schematic configuration of a steering device according to Modification 1. As shown in FIG. FIG. 5 is a partial cross-sectional view showing a schematic configuration of a vehicle according to Modification 2. As shown in FIG. FIG. 6 is an enlarged schematic diagram showing a detachment mechanism according to Modification 3. As shown in FIG. FIG. 7 is an exploded perspective view showing a detachment mechanism according to Modification 3. FIG. FIG. 8 is an enlarged schematic diagram of a detachment mechanism according to Modification 4. As shown in FIG. 9 is an exploded perspective view showing a detachment mechanism according to Modification 4. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[composition]
FIG. 1 is a partial cross-sectional view showing part of the schematic configuration of vehicle 100 according to the embodiment. 1, the longitudinal direction of the vehicle 100 is the Y-axis direction, the lateral direction of the vehicle 100 is the X-axis direction, and the vertical direction of the vehicle 100 is the Z-axis direction. As shown in FIG. 1, a vehicle 100 includes a seat 110 on which a driver is seated, and a steering device 1 that is operated by the driver seated on the seat 110 to turn steerable wheels (not shown) of the vehicle 100 . have.

The steering device 1 is a retractable steering device, and before manual operation is performed by the driver, the steering member 2 moves rearward and is maintained at a position where manual operation is possible. On the other hand, during automatic driving, the steering member 2 moves forward, and a part of the steering device 1 moves forward and is retracted.

As shown in FIG. 1, the steering device 1 includes a steering member 2, a steering input shaft 3, a movable portion 4, a holding portion 5, and a support portion 6. The steering member 2 is a member for instructing the angle of the steered wheels (steering angle) by being operated by the driver during manual operation. In the case of this embodiment, a steering wheel is employed as the steering member 2, but the steering member 2 is not particularly limited to the steering wheel, and can be operated by the driver to change the traveling direction of the vehicle. If so, any structure such as a stick shape or a pad shape can be adopted.

The steering input shaft 3 is a shaft body that supports the steering member 2 . Specifically, the steering input shaft 3 has the steering member 2 attached to the end on the rear side of the vehicle 100 , and the end on the front side of the vehicle 100 rotatably attached to the movable portion 4 . .

The movable part 4 is a part that can be reciprocated along the longitudinal direction of the vehicle 100 . That is, when the movable portion 4 reciprocates, the steering input shaft 3 and the steering member 2 also reciprocate accordingly. A reaction force generator (not shown) is mounted on the movable portion 4 . The reaction force generating device is a device that applies torque to the steering input shaft 3 according to the driver's operation when the driver turns the steering member 2 to operate it. This reaction force generating device is, for example, a device that reproduces the driver's sense of force required for steering in a conventional vehicle in which the steered wheels and the steering member are mechanically connected.

The holding part 5 is a part that holds the movable part 4 so that it can reciprocate. The holding portion 5 has a power transmission mechanism for reciprocating the movable portion 4, although not shown. The power transmission mechanism is a mechanism for transmitting power from a driving source such as a motor to the movable part 4 to reciprocate the movable part 4, and is a mechanism using a belt drive, gears, nuts, etc., for example.

One end 51 of the holding portion 5 on the front side of the vehicle 100 is formed in a spherical shape. A portion of the holding portion 5 that is spaced rearward from the one end portion 51 is rotatably supported with respect to the reinforcement 130 of the vehicle 100 . In this case, the rotation axis of the holding portion 5 is parallel to the X-axis direction. Specifically, the holding part 5 is attached to the reinforcement 130 via a bearing or a hinge mechanism, and the holding part 5 rotates about the reinforcement 130 around the bearing or the hinge mechanism. It's becoming A steering support member may be interposed between the holding portion 5 and the reinforcement 130 . In this case, the steering support member may also rotate together with the holding portion 5 . Further, the mechanism for rotatably holding the holding portion 5 with respect to the reinforcement 130 may not be a bearing or a hinge mechanism. The holding portion may be rotated with respect to the reinforcement by elastic deformation of the sheet metal.

The support part 6 is a part fixed below the dash panel 11 in the vehicle 100 . FIG. 2 is a schematic diagram showing an enlarged part of the support portion 6 according to the embodiment. As shown in FIG. 2, the support portion 6 is formed with a planar inclined surface 61 that extends forward as it extends downward. A holding body 62 that holds the one end portion 51 of the holding portion 5 is fixed to the inclined surface 61 . Specifically, the holding member 62 is engaged while covering a portion of the spherical surface 51 a of the one end portion 51 . The holding member 62 is made of, for example, resin, and when it receives a certain impact, the one end 51 (spherical surface 51a) comes off the holding member 62 and separates. The holding member 62 may be formed in a capsule shape to accommodate the one end portion 51 , and may break when receiving a certain impact to release the one end portion 51 from the holding member 62 .

[motion]
Next, the operation of the steering device 1 when the front part of the vehicle 100 collides will be described. FIG. 3 is a partial cross-sectional view showing a state after collision of vehicle 100 according to the embodiment. As shown in FIG. 3, when the front portion of the vehicle 100 collides and deforms, the support portion 6 also retreats along with this deformation. At this time, if the impact at the time of collision is a certain amount or more, the deformation of the front portion of the vehicle 100 becomes large, and the support portion 6 also moves backward enough to push the one end portion 51 of the holding portion 5 downward. Moreover, the holding body 62 separates the one end portion 51 of the holding portion 5 by receiving an impact at the time of collision. Due to this detachment, the one end 51 of the holding part 5 is directly arranged on the inclined surface 61 . As a result, the one end portion 51 of the holding portion 5 is gradually pushed downward by the inclined surface 61 of the retreating support portion 6 . That is, the inclined surface 61 is an example of a guide portion that pushes the one end portion 51 downward. Since one end portion 51 of the holding portion 5 is a spherical surface 51a, a part of the convex curved surface portion thereof is pushed by the inclined surface 61 and smoothly moves downward on the inclined surface 61. As shown in FIG. This movement causes the holding portion 5 to rotate around the reinforcement 130, so that the movable portion 4, the steering member 2, and the steering input shaft 3 move upward to avoid the driver. Moving. The dash panel 11 preferably has a shape that avoids interference with the rotating holding portion 5 , or a material and strength that does not hinder the rotation of the holding portion 5 even if it interferes with the holding portion 5 .

[Effects, etc.]
As described above, according to the steering device 1 according to the present embodiment, the one end portion 51 of the holding portion 5 is supported by the support portion 6. When the front portion of the vehicle 100 collides with the front portion of the vehicle 100, the support portion 6 moves toward the one end portion. Push the part 51 downward. At this time, since the portion of the holding portion 5 that is separated rearward from the one end portion 51 is rotatably supported by the reinforcement 130 of the vehicle 100, the holding portion 5 rotates so that the one end portion 51 faces downward. . As a result, the movable portion 4, the steering member 2, and the steering input shaft 3 move upward, thereby avoiding the driver. Therefore, it is possible to suppress the occurrence of secondary collisions.

In addition, since the holding body 62 of the support part 6 supports the one end 51 of the holding part 5 so as to separate from the impact of the collision, the one end 51 does not restrict the holding body 62 after separation. I do not receive. That is, since the movement range of the one end portion 51 is increased, the rotation range of the holding portion 5 can also be increased. As a result, the movable portion 4, the steering member 2, and the steering input shaft 3 also have a larger rotation range, so the movable portion 4, the steering member 2, and the steering input shaft 3 must be moved to more reliably avoid the driver. can be done.

In addition, since the inclined surface 61 pushes the one end portion 51 of the holding portion 5 downward when the impact at the time of collision is greater than or equal to a certain amount, the one end portion 51 can be pushed downward when the front portion of the vehicle 100 receives a relatively large impact. is pushed downward by the inclined surface 61 . That is, in a situation where a secondary collision is likely to occur, the inclined surface 61 pushes the one end portion 51 downward, so that the occurrence of the secondary collision can be suppressed more reliably.

Since the spherical surface 51a (convex curved surface portion) forming the one end portion 51 of the holding portion 5 is pushed by the inclined surface 61, the contact area with the inclined surface 61 can be reduced. As a result, the one end portion 51 can smoothly move on the inclined surface 61, and the rotation of the holding portion 5 can be performed smoothly.

[Modification]
Although the cutoff device according to the above embodiments has been described above, the present disclosure is not limited to these embodiments. As long as it does not deviate from the spirit of the present disclosure, the present disclosure may include various modifications that a person skilled in the art can come up with, and a configuration constructed by combining the components of different embodiments. . In the following description, parts that are the same as those in the above-described embodiment are denoted by the same reference numerals, and description thereof may be omitted.

(Modification 1)
FIG. 4 is a partial cross-sectional view of a vehicle 100A showing a schematic configuration of a steering device 1A according to Modification 1. As shown in FIG. Specifically, FIG. 4 is a diagram corresponding to FIG. As shown in FIG. 4, the steering device 1A has a tilt mechanism 30b for adjusting the position of the steering member 2 in the vertical direction. The tilt mechanism 30b is an example of a holding portion and has a bracket 31b and a body portion 32b. The bracket 31b is supported with one end 33b on the front side of the vehicle 100A in contact with the inclined surface 61 of the support portion 6. As shown in FIG. In addition, a portion of the bracket 31b that is spaced rearward from the one end portion 33b is rotatably supported with respect to the reinforcement 130. As shown in FIG. The bracket 31b is provided with a support column 34b that supports the body portion 32b so as to be vertically movable.

The body portion 32b is a portion that holds the movable portion 4 so that it can reciprocate. It is supposed to be adjusted.

In this modified example, when the front portion of the vehicle 100A collides and deforms, the support portion 6 also retreats along with this deformation. At this time, if the impact at the time of collision is greater than a certain amount, the deformation of the front portion of the vehicle 100A also increases, and the support portion 6 also moves backward enough to push the one end portion 33b of the bracket 31b downward. Also, the one end 33b of the bracket 31b is gradually pushed downward by the inclined surface 61 of the retreating support portion 6. As shown in FIG. As a result, the bracket 31b rotates around the reinforcement 130, so that the body portion 32b, the movable portion 4, the steering member 2, and the steering input shaft 3 move upward to avoid the driver. move to

Thus, even with the tilt-adjustable steering device 1A, it is possible to more reliably suppress the occurrence of a secondary collision.

(Modification 2)
FIG. 5 is a partial cross-sectional view showing a schematic configuration of a vehicle 100B according to Modification 2. As shown in FIG. Specifically, FIG. 5 is a diagram corresponding to FIG. A vehicle 100B according to Modification 2 is provided with an airbag 102b on the ceiling 101b of the passenger compartment and an airbag 111b on a seat 110b. FIG. 5 shows a state in which the

airbags

102b and 111b are inflated because it is after the collision. As shown in FIG. 5, when the holding portion 5 rotates, the movable portion 4, the steering member 2, and the steering input shaft 3 move upward. A space is formed in front of the seat 110b. Therefore, it is possible to prevent the movable portion 4, the steering member 2, and the steering input shaft 3 from hindering the expansion of the

airbags

102b and 111b, and the secondary collision can be suppressed more reliably by the airbags 102b and 111b. is.

In this modified example, the vehicle 100B in which the airbag 102b is provided on the ceiling 101b of the passenger compartment and the airbag 111b is provided on the seat 110b is illustrated. It may be a vehicle that has

(Modification 3)
In the above-described embodiment, a part of the spherical surface 51a of the one end 51 of the holding part 5 is covered with the holding body 62 of the supporting part 6, and the one end 51 is held when receiving a certain impact. A detachment mechanism that detaches and detaches from the body 62 is illustrated. In this modified example 3, a detachment mechanism different from the above-described embodiment will be described.

FIG. 6 is a schematic diagram showing an enlarged detachment mechanism according to Modification 3. FIG. FIG. 7 is an exploded perspective view showing a detachment mechanism according to Modification 3. FIG.

As shown in FIGS. 6 and 7, the detachment mechanism according to Modification 3 has one end portion 51b of the holding portion 5B, a holding body 62B and a fixing screw 7B. One end portion 51b of the holding portion 5B is made of sheet metal and is bent so that its tip portion faces upward. A vertically extending notch 52b is formed at the tip of the one end portion 51b.

The holder 62B is made of sheet metal and fixed to the inclined surface 61b. The holding body 62B has a flat plate-like base portion 63b, a facing portion 64b facing the base portion 63b in the Y-axis direction, and a connecting portion 65b connecting the base portion 63b and the facing portion 64b at their upper portions.

The base portion 63b has a first through hole 631b in its central portion through which the fixing screw 7B is inserted. The opposing portion 64b has a second through hole 641b in its center portion through which the fixing screw 7B is inserted. The second through hole 641b is formed by burring and configured to receive an axial force. By forming the second through-hole 641b by burring, a cylindrical portion 644b (peripheral wall) protruding in the Y-axis negative direction is formed around the second through-hole 641b. The cylindrical portion 644b passes through the notch 52b and its tip portion is in contact with the base portion 63b.

The inclined surface 61b is formed with a screw hole 611b with which the fixing screw 7B is engaged. The holder 62B is fixed to the inclined surface 61b.

A pair of slits 642b extending in the Z-axis direction are formed at positions sandwiching the second through hole 641b in the X-axis direction in the opposing portion 64b. In the facing portion 64b, a pair of curved spring portions 643b are formed outside the pair of slits 642b in the X-axis direction so as to protrude in the negative Y-axis direction. One end portion 51b of the holding portion 5B is interposed between the pair of spring portions 643b and the base portion 63b, and is sandwiched between the spring portions 643b and the base portion 63b. As a result, the one end portion 51b of the holding portion 5B is locked by the holding body 62B. In this state, the fixing screw 7B is arranged in the notch 52b of the one end portion 51b.

Here, when the detachment mechanism according to Modification 3 receives an impact at the time of vehicle collision, each spring portion 643b of the holding body 62B is deformed, weakening the clamping force on the one end portion 51b of the holding portion 5B. As a result, the one end portion 51b moves downward and separates from the holder 62B.

(Modification 4)
In modification 4, another detachment mechanism will be described. FIG. 8 is an enlarged schematic diagram showing a detachment mechanism according to Modification 4. As shown in FIG. 9 is an exploded perspective view showing a detachment mechanism according to Modification 4. FIG.

As shown in FIGS. 8 and 9, the detachment mechanism according to Modification 4 has one end portion 51c of the holding portion 5C, a holding body 62C, and a fixing screw 7C. One end portion 51c of the holding portion 5C is made of sheet metal and is bent so that its tip portion faces upward. A vertically extending notch 52c is formed at the tip of the one end 51c. A pair of first fitting holes 53c are formed on the side of the notch 52c in the one end 51c so as to penetrate in the Y-axis direction.

The holder 62C is made of sheet metal and fixed to the inclined surface 61c. The holder 62C has a flat base 63c, a facing portion 64c that faces the base 63c in the Y-axis direction, and a connecting portion 65c that connects the base 63c and the facing portion 64c at their upper portions.

The base portion 63c has a first through hole 631c in its central portion through which the fixing screw 7C is inserted. The opposing portion 64c has a second through hole 641c in its center portion through which the fixing screw 7C is inserted. The second through hole 641c is formed by burring and configured to receive an axial force. By forming the second through-hole 641c by burring, a cylindrical portion 644c (peripheral wall) protruding in the Y-axis negative direction is formed around the second through-hole 641c. The cylindrical portion 644c passes through the notch 52c and its tip portion is in contact with the base portion 63c.

A screw hole 611c for engaging the fixing screw 7C is formed in the inclined surface 61c. 62 C of holding bodies are fixed to the inclined surface 61c.

A pair of slits 642c extending in the Z-axis direction are formed at positions sandwiching the second through hole 641c in the X-axis direction in the opposing portion 64c. In the opposing portion 64c, a pair of second fitting holes 643c are formed so as to penetrate in the Y-axis direction outside the pair of slits 642c in the X-axis direction.

One end portion 51c of the holding portion 5C is interposed between the base portion 63c and the facing portion 64c. At this time, the resin pins 8C are fitted into the first fitting holes 53c of the one end portion 51c and the second fitting holes 643c of the facing portion 64c. As a result, the one end portion 51c of the holding portion 5C is locked by the holding body 62C. In this state, the fixing screw 7C is arranged in the notch 52c of the one end portion 51c.

Here, when the detachment mechanism according to Modification 4 receives an impact during a vehicle collision, each resin pin 8C is sheared. As a result, the one end portion 51c of the holding portion 5C moves downward and separates from the holding body 62C.

(others)
In the above-described embodiment, the inclined surface 61 is flat, but the inclined surface 61 may be curved.

In the above embodiment, the case where the one end portion 51 of the holding portion 5 separates from the holding body 62 of the support portion 6 upon receiving an impact has been illustrated. However, the one end portion 51 of the holding portion 5 does not have to be separated from the holding body 62 . Also, the one end portion 51 of the holding portion 5 may be directly supported by the inclined surface 61 of the support portion 6 .

In the above embodiment, the case where the one end portion 51 of the holding portion 5 has the spherical surface 51a is exemplified. However, one end of the holding portion may not have a spherical surface. In this case, the inclined surface 61 is preferably a smooth surface on which one end of the holding portion smoothly moves downward.

Forms constructed by arbitrarily combining the constituent elements included in the above embodiments and modifications thereof are also included within the scope of the present invention.

1, 1A... Steering device 2... Steering member 3... Steering input shaft 4... Movable part 5... Holding part 6...

Support part

7B, 7C... Fixing screw 8C... Resin pin 11... Dash panel 30b... Tilt mechanism (holding part) 31b Bracket

32b Main body

33b, 51, 51b, 51c One end 34b Support column 51a Spherical surface (convex curved surface) 52b, 52c Notch 53c

First fitting hole

61, 61b, 61c Inclined surface (guide Part) 62, 62B, 62C... Holding

body

63b, 63c...

Base part

64b, 64c... Facing

part

65b, 65c...

Connecting part

100, 100A, 100B... Vehicle 101b...

Ceiling

102b, 111b... Airbag 110, 110b... Seat 130...

Reinforcement hose

611b, 611c... screw

hole

631b, 631c... first through

hole

641b, 641c... second through

hole

642b, 642c... slit 643b... spring part 643c... second fitting hole

Claims

a steering input shaft to which the steering member is attached;
a movable portion to which the steering input shaft is attached and which is reciprocally movable along the longitudinal direction of the vehicle;
a holding portion that holds the movable portion so as to reciprocate;
a support portion that supports one end portion of the holding portion on the front side of the vehicle and pushes the one end portion downward when the vehicle collides;
A steering device in which a portion of the holding portion rearwardly away from the one end portion is rotatably supported by the vehicle.
2. The support part supports the one end part so as to be detached by receiving an impact at the time of collision, and by pushing the detached one end part downward, the holding part is rotated. Steering device as described.
The steering device according to claim 1 or 2, wherein the support portion has a guide portion that pushes the one end portion downward when the impact at the time of collision is equal to or greater than a certain amount.
The steering device according to claim 3, wherein the one end portion has a convex curved portion that is pushed by the guide portion.
The holding part is
a bracket rotatably fixed to the vehicle;
The steering device according to any one of claims 1 to 4, further comprising a main body portion supported by the bracket so as to be vertically movable and holding the movable portion so as to be reciprocally movable.
The steering according to any one of claims 1 to 5, wherein when the holding portion rotates, a space is formed for inflating an airbag provided in at least one of the ceiling of the vehicle and the seat of the vehicle. Device.