WO2015122005A1

WO2015122005A1 - Lateral collision safety device for small vehicle

Info

Publication number: WO2015122005A1
Application number: PCT/JP2014/053606
Authority: WO
Inventors: 日出夫鶴巻; 隆之森田; 大悟増本; 優理絵小網; 明和泰道
Original assignee: 株式会社Ｆｏｍｍ; 大同工業株式会社; 日本特殊陶業株式会社
Priority date: 2014-02-17
Filing date: 2014-02-17
Publication date: 2015-08-20
Also published as: JPWO2015122005A1

Abstract

Small vehicles provided with a chassis that is for a very small electric vehicle and that has a ladder-type main frame are unprotected against lateral collisions. In the present invention, a chassis (20) has main frame (21) and a side frame (22). The side frame (22) has a projecting member (26) that projects in the lateral direction and a lateral coupling member (27). The lateral coupling member (27) is joined to the main frame (21) so as to have less joining strength in the lateral direction than in the front-rear direction. Seats (7) are securely joined to the lateral coupling member (27). When the projecting member (26) is deformed during a lateral collision, the lateral coupling member (27) becomes disjoined from the main frame (21) and moves with the seats (7) so as to escape from the colliding object.

Description

Side collision safety device for small vehicles

The present invention relates to a small vehicle such as an ultra-compact electric vehicle, and more particularly to a side collision safety device for safety of passengers when a collision occurs from the side.

Recently, various types of micro electric vehicles (mobility) using an electric motor with a rated output of 8 [kW] or less as a drive source have been proposed. The ultra-compact electric vehicle is intended for short-distance travel by one or two people. If the vehicle does not travel on a highway and the traveling speed is limited to a maximum speed of 30 [km / h] or less, the collision safety standard is also relaxed. However, it is uneasy in terms of operation (Non-Patent Document 1).

Generally, in the micro electric vehicle, a seat such as a driver's seat is fixed to a ladder type main frame suspended on wheels (see Non-Patent

Documents

2, 3, and 4).

The ultra-compact electric vehicle is equipped with various devices such as a charger and a controller in the front part of the vehicle body, and in a collision from the front, the collision object is directly seated together with the main frame extending in the longitudinal direction of the vehicle body. There is little effect on the passengers. However, the side face direction of the vehicle body is only opened or simply attached with a door, and is almost unprotected against a collision from the side face direction, and there is a possibility that the collision object hits the occupant of the seat. In addition, it is difficult to attach a side impact beam to a door because of the nature of an ultra-compact electric vehicle having a ladder frame structure and being small and light.

In the present invention, a main frame (21) having parallel main members (21a, 21a) extending in the front-rear direction of the vehicle body (3) and a plurality of cross members (21b. In the side collision safety device for small vehicles
Left and right projecting members (26, 26) projecting from the main frame (21) in the lateral direction of the vehicle body and extending in the longitudinal direction of the vehicle body, and lateral connecting members (27) extending in the lateral direction so as to connect the left and right projecting members , 27) and a side frame (22) having
An occupant seat (7) is coupled to the lateral connecting member (27),
The lateral coupling member (27) is coupled to the main frame (21) with a coupling force in the lateral direction lower than that of the lateral coupling member (27) and the seat (7).
The side collision safety device for a small vehicle is characterized in that.

As a result, when a collision occurs from the side of the vehicle body and the collision object deforms the protruding member and projects into the vehicle body, the lateral coupling force of the lateral coupling member to the main member is Since it is weaker than the coupling force, the lateral coupling member also moves in the same direction due to deformation in the direction approaching the main member of the overhanging member, so that the seat coupled to the lateral coupling member can escape from the collision object. Moving. Accordingly, a passenger such as a driver held in the seat is prevented from hitting the collision object, and safety is maintained.

The lateral coupling member (27) and the main member (21a) are coupled with a coupling force having a lower coupling force in the vehicle body lateral direction than the coupling force in the vehicle body longitudinal direction.

As a result, in the event of a collision from the front of the vehicle body, the side frame coupled to the main frame having a high strength in the longitudinal direction of the vehicle body with a coupling force having a high coupling force in the longitudinal direction is also held integrally with the main frame, The seat coupled to the connecting member is also maintained in place. Therefore, a driver or other passenger held in the seat is also held on the spot, and the bonnet arranged in the front part of the vehicle body and various devices stored therein are interposed between the collision object and the passenger, Crew are not directly hit. Further, the collision energy in the frontal collision is absorbed by the deformation of the bonnet portion including the front frame, and the impact on the seat occupant is mitigated.

The horizontal connecting member (27) is joined to the main member (21a) with a U-shaped mounting bracket.

As a result, the lateral coupling member attached to the main member with the U-shaped mounting bracket has a lower lateral coupling force compared to the front-rear direction, and maintains the coupling against the front-rear direction impact while maintaining the coupling. However, in the case of a lateral impact, the coupling is easily released by the impact on the overhang member, and the occupant can escape from the collision object together with the seat.

The front end and the rear end of the overhang member are fixed to the outer surface of the main member.

As a result, the front and rear end portions of the overhang member are fixed to the outer surface of the main member, and in the case of a weak side collision that does not deform the overhang member, the overhang member functions as a guard, I can protect you. Further, in the case of a side collision that is strong enough to deform the side frame, the strong side collision energy is absorbed by the deformation of the front end and rear end of the overhang member connected to the main member, and the impact on the occupant held in the seat Can be relaxed.

The seat is a bucket type having side portions on the left and right sides of the backrest.

As a result, passengers such as drivers are seated in bucket seats having side portions, so that in the case of a side collision, the passenger is stably held in the seat in the lateral direction, and from the collision object as the side frame is deformed. Can move to escape.

The vehicle body has a vehicle width of 1380 [mm] or less.

This makes it possible to achieve the above-mentioned occupant safety by applying it to the body of a micro vehicle.

The small vehicle is a micro electric vehicle that is driven by an electric motor having a rated output of 15 [kW] or less.

】 This makes it possible to maintain the safety of occupants not only in frontal collisions but also in side collisions when applied to ultra-compact electric vehicles where the maximum speed is limited.

In addition, although it is for contrasting the code | symbol in the said parenthesis, it has no influence on the structure as described in a claim by this.

According to the present invention, for example, in a small vehicle having a main frame in a chassis such as a micro electric vehicle, the safety of the occupant can be maintained not only in frontal impact but also in a side collision.

1 is an overall side view showing an outline of a micro electric vehicle (mobility) to which the present invention can be applied. The perspective view which shows the chassis by embodiment of this invention. FIG. The top view which shows the chassis by embodiment of this invention. The perspective view which expands and shows the principal part of the said chassis. The perspective view which shows the vehicle body frame by embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, a micro electric vehicle (mobility) 1 according to the present invention has a vehicle body 3 suspended by four wheels 2, and at least two of these wheels (for example, front wheels) The in-wheel motor 2a has a rated output of 8 [kW] or less in total. The vehicle body 3 has a vehicle width of 1380 [mm] or less and includes a cabin 5 having a door. In the cabin 5, one row of seats 7 is arranged in the left-right direction, and facing forward. The driver seat 7a is on the right side and the passenger seat 7b is on the left side (see FIGS. 2 and 3). Various devices such as a sub-battery 10 made of a lead battery for in-vehicle devices such as a charger 6, a controller 8, a regenerator type cooling device 9, and a headlamp are arranged at the front of the vehicle body 3. A steering wheel 11 is provided from the front of the vehicle body 3 toward the driver's seat 7a, and the steering wheel is a bar handle. In addition, a rear portion of the vehicle body 3 is a package space, two battery packages 12 are disposed below the package space, and one battery package 12 is provided below each of the driver seat 7a and the passenger seat 7b. These four battery packages 12 in total are composed of lithium ion batteries, and constitute a main battery for vehicle travel.

Next, a chassis configuration constituting the vehicle body 3 of the micro electric vehicle 1 will be described with reference to FIGS. 2 to 6. The chassis 20 includes a ladder-type main frame 21 made of an aluminum alloy molding material and a side frame 22 made of a steel pipe material. The main frame 21 includes

main members

21a and 21a extending in parallel with the front-rear direction of the vehicle body, and a plurality (four) of cross members 21b extending in the lateral direction connecting the two main members.

Suspension frames

23 and 25 extending upward in a U shape are integrally fixed to the front and rear end portions of the two

main members

21a and 21a. The front wheel 2 is suspended from the front suspension frame 23 via a suspension device, and the rear wheel 2 is suspended from the rear suspension frame 25 via a suspension device.

The side frame 22 extends laterally from the main member 21a of the main frame 21 and extends laterally so as to connect the left and right extended

members

26, 26 extending in the longitudinal direction of the vehicle body and the left and right extended members. It consists of a horizontal connecting

member

27, 27. A front connecting member 29 and a rear connecting member 30 that extend in the lateral direction of the vehicle body are integrally fixed to the front and rear end portions of the left and right projecting members 26, and these front and rear connecting

members

29 and 30 are respectively attached via mounting brackets 31. It is fixed to the outer surface of the main member 21a. The two lateral coupling members 27 of the side frame 22 are firmly fixed to the projecting member 26 so that both ends thereof are firmly united with each other, and a U-shaped attachment is provided on the

main members

21a and 21a of the main frame 21. They are fastened (coupled) by bolts 33 through metal fittings 32.

The seat 7 including the driver's seat 7a and the passenger seat 7b is supported by seat frames 35 ..., and the seat frame 35 has four legs 35a ... on each

seat

7a, 7b. A flat plate plate is fixed (coupled) to the end of each foot 35a. The seat plate 36 sandwiches the horizontal connecting member at a predetermined position of the horizontal connecting member 27 of the side frame 22. In this way, it is fixed with bolts 39 on the upper surface of the mounting members 37. Each of the

seats

7a and 7b is a bucket type having a side portion 40c that stabilizes the lateral direction of the occupant in addition to the seating surface 40a and the backrest 40b, and has a headrest 41 and a seat belt buckle 42. Yes.

Therefore, the side frame 22 is relatively firmly coupled to the main frame 21 with respect to the longitudinal load (acceleration) of the vehicle body by the U-shaped mounting bracket 32, but against the lateral load (acceleration). Are coupled with a relatively low bonding force. Each seat 7 with respect to the side frame 22 is fixed by a mounting member 37 with a relatively high coupling force in the front-rear direction and the lateral direction. That is, the coupling force between the main frame 21 and the side frame 22 is lower than the coupling force between the side frame 22 and the seat 7 with respect to the lateral load. The coupling relationship between the side frame and the seat and the main frame and the side frame constitutes a side collision safety device against a collision from the side.

FIG. 6 is a view showing a vehicle body frame 45 constituting the cabin 5 above the chassis 20. The vehicle body frame 45 is made of an aluminum alloy pipe material, and has three

U-shaped frame members

45a, 45b, 45c as viewed from the front, two

ceiling members

45d, 45d that connect the cabin ceiling portion, Connecting

members

45f, 45g, and 45h that connect the side surfaces and rear surfaces of the two

frame members

45b and 45c. The lower ends of the front two

frame members

45a and 45b are respectively attached to the front connecting member 29 and the rear connecting member 30 of the side frame 22 by mounting brackets, and the lower end of the rear frame member 45c is attached to the main frame 21. The left and right main members 21a are attached to the rear end portions by metal fittings.

The front of the front frame member 45a is composed of a front frame 47 that constitutes the bonnet of the vehicle body 3 that houses each device. The front frame 47 is made of a steel pipe material. The

frame members

47a and 47b and the two connecting

members

47c and 47c constituting the upper surface portion, and the frame member 47a are connected to the front frame frame member 45a and the front frame member 47a.

Column members

47e and 47f connected to the suspension frame 23. The vehicle body frame 45 includes a rear frame 49 that constitutes a rack space behind the cabin 5. The rear frame 49 is made of a steel pipe material, and includes an auxiliary member 49a that connects the left and right rear suspension frames 25, connecting

members

49b and 49b that connect the auxiliary member 49a and the left and right

main members

21a and 21b, It has a connecting member 49c that connects the frame member 45c, and

auxiliary members

49d and 49d that connect the connecting member 49c and the left and right main members 21a.

A panel and glass are attached to the vehicle body frame 45, and a cabin 5 (see FIG. 1) surrounding the seat 7 and the rack space is formed, and doors are attached to both sides thereof. The front frame 47 is provided with a panel, a power supply port, and the like, and constitutes a bonnet in which various devices such as a charger are accommodated.

Next, the operation of the micro electric vehicle 1 will be described. When using the micro electric vehicle 1, an occupant such as a driver sits on the

seats

7 a and 7 b and stops the seat belt on the buckle 42. The micro electric vehicle 1 travels at a speed of 30 [km / h] or less by the rotation of the in-wheel motor 2a based on the traveling battery 12 by the operation of the driver.

When the micro electric vehicle 1 collides head-on from the front during the traveling, the main frame 21 having high rigidity in the front-rear direction is not greatly deformed even if the front frame 47 is destroyed. The side frame 22 fastened to the

main members

21a, 21a of the main frame 21 by a mounting member 37 in the front-rear direction maintains the coupling state, and is further attached to the side frame 22 with a high coupling force. The seat 7 is also held in the coupled state. Therefore, the seat 7 is maintained in a state where it is integrally held by the main frame 21 with little deformation, and a passenger such as a driver held by the seat belt 7 by the seat belt is also maintained in that position.

At the time of the frontal collision, a bonnet portion in which various devices such as the charger 6 are interposed between the driver and other passengers and the collision object, the collision object does not directly hit the driver, and the front part The collision energy is absorbed by the destruction of the bonnet portion including the frame 47. Thereby, a passenger such as a driver held in the seat 7 held in the main frame 21 is kept safe against a frontal collision at a speed of 30 [km / h] or less.

In the case of a side collision in which a collision object such as another automobile collides with the micro electric vehicle 1 from the side, if the collision force is so weak that the side frame 22 is not deformed, that is, the front coupling member 29 and the rear coupling member 30 When the overhang member 26 fixed to the outer surface of the main member 21a is not deformed, the seat 7 fixed to the lateral connection member 27 of the side frame 22 by the mounting bracket 32 is also held in that position. Therefore, the projecting member 26 of the side frame 22 functions as a guard against the collision object, and the collision object does not directly hit a passenger such as a driver held on the seat 7 by the seat belt, so that safety is maintained.

In the side collision, the side frame 22 is deformed when the collision force is strong. That is, the front connecting member 29 and the rear connecting member 30 are deformed, or the mounting bracket 31 is removed, or the overhang member 26 is bent and deformed. In this state, the overhang member 26 is deformed together with the collision object in a direction approaching the main member 21a, and the vehicle body frame 45 is also deformed. The deformation of the overhang member 26 acts on the lateral connecting member 27, and the coupling of the U-shaped mounting bracket 32 with the coupling force in the left-right direction lower than that in the front-rear direction is released from the main member 21a. As a result, the seat 7 firmly attached to the horizontal connecting member 27 moves so as to escape from the collision object as the horizontal connecting member 27 moves. Accordingly, a passenger such as a driver held on the seat 7 by the seat belt moves together with the projecting member deformed by the collision object so as to avoid hitting the collision object, thereby maintaining the safety of the passenger. The energy of the side collision is absorbed by the deformation of the side frame 22, and the impact of the collision is alleviated. Further, since the

seats

7a and 7b are formed of bucket seats having the side portions 40c, the occupant is firmly held against the lateral load, and can escape from the collision object together with the seat at the time of the side collision.

In the above embodiment, the horizontal connecting member 27 is fastened to the main member 21a by the U-shaped mounting bracket 32. However, in addition to the mounting bracket or in place of the mounting bracket, the horizontal coupling member 27 is coupled by other means such as welding. Also good.

Moreover, although the said embodiment applied and demonstrated to the micro electric vehicle (mobility) of the rated output 8 [kW] or less, the drive source may be an electric motor of the maximum continuous rated output 15 [kW] or less, Further, the present invention is not necessarily limited to an electric motor, and can be similarly applied to an engine using an internal combustion engine of 125 [cc] or less, and can be similarly applied to a small three-wheeled vehicle used in the Philippines and the like. In short, the present invention can be applied to a small vehicle using a ladder type main frame as a chassis. The small vehicle is not limited to the one having a cabin with a door that covers the seat portion, but may be another type such as one having a side opened.

The present invention is used for a small vehicle such as a micro electric vehicle having a rated output of 15 [kW] or less.

1 Small vehicle (ultra-small electric vehicle)
3

Car body

7, 7a, 7b Seat (driver's seat, passenger seat)
20 chassis 21 main frame (ladder frame)

21a Main member

21b Cross member 22 Side frame 26 Overhang member 27 Horizontal connecting member 29 Front connecting member 30 Rear connecting member 32 Mounting bracket 37 Mounting member 45 Body frame 47 Front frame

Claims

In a side collision safety device for a small vehicle having a main frame having a main frame having a parallel main member extending in the front-rear direction of the vehicle body and a plurality of cross members connecting the main members,
A side frame having left and right projecting members extending in the lateral direction of the vehicle body from the main frame and extending in the front-rear direction of the vehicle body, and a lateral coupling member extending in the lateral direction so as to connect the left and right projecting members;
A passenger's seat is coupled to the lateral connecting member;
The lateral coupling member is coupled to the main frame with a lateral coupling force that is lower than the coupling force of the seat to the lateral coupling member.
A side collision safety device for a small vehicle.
The lateral coupling member and the main member are coupled with a coupling force having a lower coupling force in the vehicle body lateral direction than the coupling force in the vehicle longitudinal direction.
The side collision safety device for a small vehicle according to claim 1.
The horizontal connecting member is joined to the main member by a U-shaped mounting bracket.
The side collision safety device for a small vehicle according to claim 2.
The front end and the rear end of the overhang member are fixed to the outer surface of the main member.
The side collision safety device for a small vehicle according to any one of claims 1 to 3.
The seat is a bucket type having side portions on the left and right sides of the backrest,
The side collision safety device for a small vehicle according to any one of claims 1 to 4.
The vehicle body has a vehicle width of 1380 [mm] or less.
The side collision safety device for a small vehicle according to any one of claims 1 to 5.
The small vehicle is a micro electric vehicle that is driven by an electric motor having a rated output of 15 [kW] or less.
The side collision safety device for a small vehicle according to any one of claims 1 to 6.