JP2019119235A - Vehicle pedal attachment structure - Google Patents

Abstract

To provide a vehicle pedal attachment structure that can prevent a vehicle pedal from being moved rearward and inhibit a steering wheel from being moved upward when a dash panel enters rearward of a vehicle.SOLUTION: A vehicle pedal attachment structure includes a pedal bracket protruding rearward of a vehicle from a first vehicle component movable rearward of the vehicle by external force equal to or greater than a predetermined force, a vehicle pedal swingably suspended with respect to the pedal bracket, and a connection member connecting a second vehicle component supporting a steering shaft to the pedal bracket. The connection member includes a lower end portion structured to push a vehicle rear portion of the pedal bracket down in accordance with the movement of the first vehicle component, and an upper end portion structured to twist the second vehicle component so that an upper end portion of the steering shaft is prevented from moving upward in accordance with the movement of the first vehicle component.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a mounting structure of a vehicle pedal. In particular, the present invention relates to a mounting structure for a vehicle pedal capable of suppressing the upward displacement of the steering wheel while preventing the vehicle pedal from moving backward to the occupant side at the time of a vehicle collision or the like.

  Patent Document 1 discloses a pedal bracket attached to a dash panel, a vehicle pedal whose upper end is pivotally supported by the pedal bracket, and a stay member which is diagonally bridged between a deck cross member and the pedal bracket And a support structure for a vehicle pedal having a deck cross bracket that regulates the rotational position of the stay member.

  In this configuration, when an external force equal to or greater than a predetermined value acts from the front of the vehicle, the dash panel deforms toward the passenger compartment, and the pedal bracket also moves toward the rear of the vehicle. Along with this, the end on the pedal bracket side of the stay member is pivoted to the vehicle rear side with respect to the deck cross member to displace the tip of the pedal bracket downward. As a result, the tip of the vehicle pedal is moved forward of the vehicle, and the tip can be prevented from interfering with the driver's lower limbs.

JP, 2016-153293, A

  In the above configuration, the steering wheel may be displaced upward, which may deteriorate the head injury value of the driver. Generally, a deck cross member has a steering shaft supported in a cross state, and a steering wheel equipped with an air bag is attached to the upper end of the shaft. On the other hand, the upper end portion of the stay member is connected to the lower side of the deck cross member. Therefore, when the lower end of the stay member pivots rearward with the displacement of the dash panel to the rear, the upper end of the stay member presses the deck cross member upward, and the deck cross member is centered on its axis. It is twisted to turn to the front of the vehicle. As a result, the steering wheel provided at the upper end of the steering shaft is also displaced upward, and the airbag may be deployed at an inappropriate position with respect to the driver, which may deteriorate the head injury value of the driver.

  One of the objects of the present invention is to provide a mounting structure for a vehicle pedal capable of suppressing the upward displacement of the steering wheel while preventing the backward movement of the vehicle pedal when the dash panel enters the rear of the vehicle. is there.

(1) A mounting structure of a pedal for a vehicle according to an aspect of the present invention includes: a pedal bracket that protrudes to the vehicle rear side from a first vehicle component that is displaced to the vehicle rear side by a predetermined external force or more;
A vehicle pedal that is swingably suspended relative to the pedal bracket;
A second vehicle component supporting a steering shaft and a connecting member connecting the pedal bracket;
The connecting member is
A lower end portion of the pedal bracket that pushes the rear side of the vehicle downward with displacement of the first vehicle component;
And an upper end portion for twisting the second vehicle constituent member so as to suppress displacement of the upper end side of the steering shaft upward with displacement of the first vehicle constituent member.

The mounting structure of the above-described pedal for a vehicle exhibits the following effects.
When the vehicle receives an unexpected external force from the front, the vehicle pedal can be prevented from moving backward and interfering with the driver's lower limbs. When a first vehicle component such as a dash panel is displaced rearward, such as in a frontal collision of the vehicle, the pedal bracket is also displaced rearward. At that time, the connecting member that was in the inclined state before the collision is turned up and approaches the state along the vertical direction, and the lower end portion of the connecting member pushes the pedal bracket downward. As a result, the front end side of the vehicle pedal can be prevented from turning to the front of the vehicle and interfering with the driver's lower limbs.

  When the vehicle receives an unexpected external force from the front, the deterioration of the head injury value of the driver can be suppressed by suppressing the upper end side (the steering wheel side) of the steering shaft from being displaced upward. As described above, with the displacement of the first vehicle component (for example, the dash panel) to the rear side, the connecting member is pivoted to rise. At that time, the upper end portion of the connecting member is such that the upper end side of the steering shaft pivots downward on a second vehicle component such as a pillar-to-pillar member (also referred to as a deck cross member). Twist it. Therefore, it can suppress that the steering wheel provided with an air bag turns upwards rather than a suitable position, and can suppress the deterioration of the driver | operator's head injury value accompanying the expansion of an air bag in an unsuitable direction.

  At normal times when the vehicle does not receive an external force from the front, the connecting member contributes to the rigidity improvement of the second vehicle component (for example, the PP member) and the pedal bracket. Thereby, the support rigidity of the steering system supported by the second vehicle component can be improved, and the operation feeling of the pedal can be improved.

  The pedal bracket can be made smaller. By connecting the pedal bracket and the second vehicle component by the connecting member, it is not necessary to extend the pedal bracket itself to a position close to the second vehicle component, and the pedal bracket can be shortened.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic structure of the attachment structure of the pedal for vehicles which concerns on Embodiment 1 is shown, (A) is a schematic diagram which shows the state at the time of normal, (B) is a schematic diagram which shows the state at the time of front collision. It is model explanatory drawing which shows the behavior of the main structural members of Embodiment 1 at the time of a vehicle collision.

  A mounting structure for a vehicle pedal according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. In any of the drawings, the front of the vehicle is denoted as FR, the rear as RR, the upper as UP, and the lower as LWR. The same reference numerals in the drawings indicate the same names. In addition, the displacement of each member in each figure is exaggerated and shown for convenience of explanation.

Embodiment 1
<Overview>
As the first embodiment, a mounting structure 1 for a vehicle pedal in which the first vehicle component is a dash panel 10 and the second vehicle component is a PP member 40 will be described.
The mounting structure 1 for a vehicle pedal according to the present embodiment includes a pedal bracket 20 projecting to the rear side of the vehicle from the dash panel 10, a vehicle pedal 30 swingably suspended relative to the pedal bracket 20, and a steering shaft 60. The connection member 50 which connects the PP member 40 to support and the pedal bracket 20 is provided. One of the features of this embodiment is that the connecting member 50 has a predetermined mounting structure. The configuration of each part will be described in more detail below.

(Dash panel)
The dash panel 10 is a plate-like member which divides an engine room and a compartment. The lower end of the dash panel 10 is connected to the floor panel 12, and the upper end is connected to a cowl top (not shown). On the surface on the engine room side of the dash panel 10, a booster having a brake booster (not shown) as a main part is attached. The brake booster includes an operating rod (not shown) which penetrates the dash panel 10 and is connected to a midway of a pedal arm 32 (described later) of the vehicle pedal 30. On the other hand, below the dash panel 10, a pedal bracket 20 is attached to the surface on the passenger compartment side.

(Pedal bracket)
The pedal bracket 20 is a member for supporting the vehicle pedal 30, and is supported in a cantilever manner so as to project rearward from the surface of the dash panel 10 on the cabin side. The shape and size of the pedal bracket 20 are not particularly limited as long as the vehicle pedal 30 can be supported. The pedal bracket 20 of this example is a substantially L-shaped member, and its front end (free end) is positioned forward and downward with respect to a PP member 40 described later, and a sufficient distance from the PP member 40 is ensured. It is a small member to the extent possible. At the time of a frontal collision of a vehicle or the like, the tip end side of the pedal bracket 20 is displaced downward, as described later, along with the rear intrusion of the dash panel 10.

(Vehicle pedal)
The vehicle pedal 30 is a pedal that is swingably suspended relative to the pedal bracket 20. The vehicle pedal 30 of this example is a brake pedal. The brake pedal has a pedal arm 32 bent in a V-shape and a tread 34 attached to the tip of the pedal arm 32. The pedal arm 32 has an upper end pivotally supported on the lower surface of the pedal bracket 20 and a lower end to which the step 34 is attached. ) Is connected. The tread 34 is positioned rearward of the upper end of the pedal arm 32. When the driver steps on the pedal 34, the lower end of the pedal arm 32 is pivoted forward, and braking operation is performed via the booster. It will be.

(Pillar-to-pillar member: PP member)
The PP member 40 is a member that secures the torsional rigidity of the vehicle body and supports the steering shaft 60 and instruments of the instrument panel, and generally passes the lower end side of the left and right front pillars (A pillars) in the vehicle width direction. It is a structural member to connect. Usually, the PP member 40 is composed of a metal pipe. A steering shaft 60 is supported by the PP member 40 so as to be inclined back and forth in a cross state. The steering shaft 60 is supported by the PP member 40 via the steering column 62. A steering wheel (not shown) is provided on the upper end side of the shaft 60, and a gear box is provided on the lower end side to connect a tie rod not shown. The driver steers the steering wheel to turn the vehicle.

  Furthermore, the PP member 40 of this example is provided with an arm portion 42. The arm portion 42 is a member that forms a link mechanism together with a connection member 50 described later and connects the PP member 40 and the pedal bracket 20. The arm portion 42 in this example is a short member integrated on the outer periphery of the PP member 40, and has sufficient rigidity not to be deformed against the external force introduced through the connecting member 50. It is preferable to set the projecting direction of the arm portion 42 in the normal state in which the dash panel 10 is not displaced within the range of 45 ° to 90 ° (horizontal) forward in the cross section of the PP member 40 viewed in the vehicle width direction. It is. This is because it is easy to transmit the external force introduced through the connecting member 50 as a force for twisting the PP member 40 rearward (clockwise in FIG. 1).

(Connection member)
The connecting member 50 is a member that connects the pedal bracket 20 and the PP member 40. The connecting member 50 is disposed obliquely between the pedal bracket 20 and the PP member 40. The shape and material of the connecting member 50 are not particularly limited, but a rod-like or pipe-like long material is suitable, and is made of a highly rigid material that does not bend or buckle when the dash panel 10 intrudes behind. Is preferred. The cross-sectional shape of the connection member 50 can use various shapes, such as a circle and a polygon.

  When the pedal bracket 20 is displaced rearward with the rearward displacement of the dash panel 10, the lower end 52 of the connecting member 50 pushes the vehicle rearward side of the pedal bracket 20 downward, and the upper end 54 of the connecting member 50 The PP member 40 is twisted so that the upper end side (steering wheel side) of the steering shaft 60 is not displaced upward. Details of the behavior of each of these members will be described later.

  The connection place between the lower end 52 of the connection member 50 and the pedal bracket 20 and the connection place between the upper end 54 of the connection member 50 and the PP member 40 are rotatable with respect to the pedal bracket 20 (PP member 40) or the pedal bracket It is possible to be configured to be deformable with respect to an external force input via 20. In particular, in the case of a pivotally supported connection point, the rearward displacement of the pedal bracket 20 can be easily transmitted as a force for twisting the PP member 40. In this example, the lower end portion 52 of the connecting member 50 is rotatably supported on the upper surface of the pedal bracket 20, and the upper end portion 54 of the connecting member 50 is rotatably supported on the tip of the arm portion 42 of the PP member 40. It is done. As a specific example of the connection portion that can be deformed with respect to the external force input via the pedal bracket 20, it is possible to have a low strength portion that is bent by this external force.

  It is preferable that the position of the connection portion between the connection member 50 and the pedal bracket 20 be in the range from the center to the rear end of the length of the pedal bracket 20 in the vehicle length direction. This is because when the external force to the rear is input to the pedal bracket 20, the rear end side of the pedal bracket 20 can be easily displaced downward at the lower end portion 52 of the connecting member 50. In this example, the position of the connection point is substantially at the center of the upper surface of the pedal bracket 20 in the vehicle length direction. The positions of the connection points may be both sides of the pedal bracket 20.

  The position of the connection point between the upper end portion 54 of the connecting member 50 and the PP member 40 is higher than the imaginary line 100 connecting the lower end portion 52 of the connecting member 50 and the center of gravity in the cross section of the PP member 40 before displacement of the dash panel 10 It is preferable to set the upper side. This virtual line 100 is shown by a two-dot chain line in FIG. 1 and FIG. The center of gravity in the cross section of the PP member 40 in this example corresponds to the center of the pipe material having a circular cross section. Due to the arrangement of the connection portion, when an external force to the rear is input to the pedal bracket 20, the PP member 40 is twisted rearward (clockwise in FIG. 1) from the upper end portion 54 of the connection member 50 to the PP member 40. It is easy to transmit as a power to turn. In the present embodiment, the upper end portion 54 of the connecting member 50 is pivotally supported by the tip of the arm portion 42 of the PP member 40, and the connecting portion is located above the virtual line 100.

  The angle between the axial direction of the connecting member 50 and the axial direction of the arm portion 42 of the PP member 40 before displacement of the dash panel 10 is preferably in the vicinity of a right angle. If this angle is almost right, the upward displacement of the upper end 54 of the connecting member 50 is effectively used for the rearward rotation of the PP member 40 (clockwise in FIG. 1) when the pedal bracket 20 is retracted. be able to. For example, it is preferable to set the angle to about 80 ° to 100 °, particularly 85 ° to 95 °.

  Besides, the connecting member 50 is preferably longer than the arm portion 42. The main force acting on the arm portion 42 is a bending stress acting in a direction substantially perpendicular to the extending direction, while the main force acting on the connecting member 50 is a compression acting in the substantially extending direction It is a force. Therefore, by making the connecting member 50 longer than the arm portion 42, the pedal bracket 20 can be pushed downward to suppress the movement of the PP member 40 to the rear while substantially only rotating it to the rear. it can.

<Function>
The behavior of each part in the mounting structure 1 for a vehicle pedal of the first embodiment will be described based on FIGS. 1 and 2 when an unexpected external force acts on the vehicle from the front, such as at the time of a frontal collision of the vehicle. 2 schematically shows the behavior of the dash panel 10, the pedal bracket 20, the connecting member 50, the arm portion 42 and the PP member 40 at the time of a collision of a vehicle.

  Before the collision of the vehicle, as shown in FIG. 1A and the left view of FIG. 2, the pedal bracket 20 projects rearward with respect to the dash panel 10, and the lower end 52 of the connecting member 50 is closer to the vehicle front. The upper end portion 54 is inclined so as to be higher toward the rear side of the vehicle.

  At the time of a frontal collision of the vehicle, as shown in FIGS. 1B and 2, the dash panel 10 is displaced rearward, and the pedal bracket 20 is also retracted accordingly. With the progress of the retraction, as shown in FIG. 1B and the right view of FIG. 2, the connecting member 50 is substantially vertical by the lower end 52 being displaced rearward and the upper end 54 being displaced forward. It is pivoted in the approaching direction. Since the connecting member 50 has sufficient rigidity not to be deformed with respect to the external force at the time of collision input from the pedal bracket 20, the straight state is maintained. Therefore, the lower end portion 52 of the connecting member 50 pushes the pedal bracket 20 downward, and displaces the rear end side of the pedal bracket 20 downward. As a result, the pedals 30 for the vehicle are pivoted forward on the side of the tread portion 34. On the other hand, the upper end portion 54 of the connecting member 50 pulls up the PP member 40 via the arm portion 42 and twists the PP member 40 rearward (clockwise in FIGS. 1 and 2) with the pulling. As a result, the upper end side of the steering shaft 60 supported by the PP member 40 is pivoted downward. That is, the steering wheel disposed at the upper end of the steering shaft 60 is also rotated so as to suppress the upward displacement.

<Effect>
The mounting structure 1 for a vehicle pedal according to the first embodiment described above has the following effects.
(1) When the vehicle receives an unexpected external force from the front, the vehicle pedal 30 can be prevented from moving backward and interfering with the driver's lower limbs. As described above, the rearward displacement of the dash panel 10 and the pedal bracket 20, the pressing of the pedal bracket 20 at the lower end 52 accompanying the rotation of the connecting member 50, and the downward displacement of the rear end side of the pedal bracket 20. As a result, the tip end side of the vehicle pedal 30 is turned to the front of the vehicle, and interference with the lower leg of the driver can be avoided.

  (2) When the vehicle receives an unexpected external force from the front, the upper end side (steering wheel side) of the steering shaft 60 is prevented from being displaced upward, thereby suppressing the deterioration of the driver's head injury value be able to. As described above, due to the rearward displacement of the dash panel 10 and the pedal bracket 20 and the twisting of the PP member 40 at the upper end 54 accompanying the rotation of the connecting member 50, the steering shaft 60 is attached It is possible to suppress the upper end side from being displaced upward. That is, although the upper end side of the steering shaft 60 is displaced (a) slightly higher than before the collision of the vehicle, the displacement amount is reduced as compared with the configuration of Patent Document 1, (b) substantially before the collision of the vehicle. It can be held in exactly the same position, or (c) can be pivoted slightly lower than before the collision of the vehicle. Therefore, the steering wheel provided with the air bag is not displaced significantly upward, and it is possible to suppress the deterioration of the head injury value of the driver accompanying the deployment of the air bag in an inappropriate direction.

  (3) When the vehicle does not receive an external force from the front, the connecting member 50 having high rigidity contributes to the rigidity improvement of the PP member 40 and the pedal bracket 20. Thereby, the support rigidity of the steering system supported by the PP member 40 can be improved, and the operation feeling of the pedal can be improved.

  (4) The pedal bracket 20 can be miniaturized. By connecting the pedal bracket 20 and the PP member 40 with the connecting member 50, it is not necessary to extend the pedal bracket 20 itself to a position close to the PP member 40, and the pedal bracket 20 can be shortened.

  The present invention is not limited to the embodiments described above, is shown by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

  The mounting structure for a vehicle pedal according to the present invention is suitably applicable to a mounting structure for a brake pedal of a vehicle.

1 Vehicle pedal mounting structure 10 Dash panel (first vehicle component)
12 floor panel 20 pedal bracket 30 vehicle pedal (brake pedal)
32 pedal arm 34 tread 40 pillar-to-pillar member (second vehicle component)
42 arm portion 50 connecting member 52 lower end portion 54 upper end portion 60 steering shaft 62 steering column 100 virtual line

Claims (1)

A pedal bracket that protrudes to the vehicle rear side from a first vehicle component that is displaced to the vehicle rear side by an external force that is greater than or equal to a predetermined value;
A vehicle pedal that is swingably suspended relative to the pedal bracket;
A second vehicle component supporting a steering shaft and a connecting member connecting the pedal bracket;
The connecting member is
A lower end portion of the pedal bracket that pushes the rear side of the vehicle downward with displacement of the first vehicle component;
A vehicle pedal mounting structure comprising: an upper end portion for twisting the second vehicle constituent member so as to suppress displacement of the upper end side of the steering shaft upward with displacement of the first vehicle constituent member .

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