JP2527985Y2 - Automotive power plant dropout device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power plant dropout device for an automobile.

[0002]

2. Description of the Related Art A conventional power plant dropping device of this type is disclosed, for example, in Japanese Patent Application Laid-Open No. 58-22718. That is, in this example, a power unit including an engine disposed in an engine room and a transmission integrated with the engine is installed via a power unit mount on a side member which is a vehicle body strength member extending in a vehicle longitudinal direction at a side portion of the engine room 1. Have been. The power unit mount is formed of an insulator rubber, a support bracket for attaching the insulator rubber to the side member, and a mounting arm extending from the insulator rubber to attach the power unit 2. At the time of a vehicle front collision, the mounting arm rotates and the power unit retreats in a direction that matches the longitudinal direction of the vehicle, drops off from a predetermined position, secures a crushed space for the front body structural member, and absorbs collision energy. It is.

[0003]

However, such a device has a problem in that since it has a purely mechanical structure, responsiveness is poor, and the crush space of the front vehicle body structural member is small.

The present invention has been made in view of such a conventional problem, and it is intended to increase the collapsing space of the front body structural member, increase the amount of collision energy absorption, and reduce the size and weight of the vehicle body. An object of the present invention is to provide an intended power plant dropout device.

[0005]

In order to achieve the above object, the present invention is to attach a vehicle body strength member supporting a power plant to another vehicle body strength member or a vehicle body with mounting bolts, and to fix a front vehicle body structural member in a proper position. A sensor for detecting a vehicle collision is attached to the control unit, and a control unit to which a detection signal of the sensor is input is provided. A destruction module that operates according to an operation signal generated from the control unit and destroys the mounting bolt is built in the mounting bolt. Things.

[0006]

[Operation] When a vehicle collides, a sensor detects the collision and issues a detection signal. The detection signal is input to the control unit, and when the control unit reaches a predetermined value, the control unit issues an operation signal. The operation signal activates the breaking module, and the mounting bolt is broken. As a result,
The vehicle body strength member supporting the power plant retreats from the predetermined position, that is, the power plant falls off. In this case, the power plant falls off immediately after the sensor detects the vehicle collision, so that the crush amount of the front vehicle body structural member increases.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes an engine room, 2 denotes a power plant comprising an engine 3 disposed in the engine room 1 and a transmission 4 integrated therewith, and 5 denotes a center of the bottom of the engine room 1 in the vehicle longitudinal direction. A center member, which is a vehicle body strength member having a vertical U-shaped cross section, extending to the center member 5, a front power plant mount 6a and a rear power plant mount 6
The power plant 2 is elastically supported through the “b”.

The center member 5 on which the power plant 2 is supported has its front end fixed to the fast cross member 8 by bolts 9 and its rear end formed by an L-shaped torque box panel 12 by mounting bolts 11 in which a destruction module 10 is incorporated. It is fixed to. The torque box panel
Both ends of 12 are lower end inclined portions 13a of the dash lower panel 13, respectively.
The floor panel 14 is connected to a horizontal portion 13b that is continuous with the lower end inclined portion 13a of the dash lower panel 13. The torque box panel 12 is provided with a torque box together with the lower inclined portion 13a of the dash lower panel 13.
Forming 15.

The back of the bumper 17, the center member 5
At the front and rear of the vehicle, sensors 18, 19, and 20 for detecting a vehicle collision are attached, respectively. That is, these sensors 18, 19, and 20 are mounted at appropriate positions on the front vehicle body structural member. Of these sensors 18, 19, 20, the sensor 18 is, for example, an accelerometer, and the sensors 19, 20 are, for example, an accelerometer or a strain gauge. The detection signal of each of these sensors 18, 19, 20 is the dash lower panel
Control unit 21 arranged on horizontal part 13b of 13
Is input to

In FIG. 1, 22 is a hood, 23 is a radiator, 24 is a radiator grill, 25 is a cooling fan, 26 is a cooler condenser, 27 is a cooler compressor, 28 is an alternator, 29 is a power steering hydraulic pump, and 30 is an apron. Reference numeral 40 denotes a steering gear.

As shown in detail in FIG. 2, the mounting bolt 11 containing the breaking module 10 is mounted on the center member 5.
And a shaft portion 11a inserted into the overlapping portion of the torque box panel 12.
A notch 11b for destruction is engraved on the male part of the shaft part 11a.
A flanged cap nut 31 having a hollow portion is screwed into 11c, and a pressure cartridge 10a and a booster mechanism 10b of the destruction module 10 are built in a hollow portion formed in the head portion 11d. Input via connector 32 and lead 33.
The operation signal from the control unit 21 is
When transmitted to the lesser cartridge 10a, the pressure
The pressure cartridge 10a is provided with a predetermined amount of pressure
Weight is generated in the upward direction in the figure, and the booster is a coupling.
By amplifying the pressure load to an appropriate magnification by the structure 10b
As a result, the shaft portion 11a is broken at the notch 11b.
ing. (For the configuration of the booster mechanism, see, for example,
No. 25, page 178, column for separation bolt and JP-A-62
(See -255300)

In the above example, the mounting bolt 11 containing the breaking module 10 is mounted on the vehicle body. However, the present invention is not limited to this, and the mounting bolt 11 may be mounted on a frame as shown in FIG. That is, in this example, the rear end of the center member 5 is overlapped with the second cross member 34, the mounting bolt 11 is inserted through this overlapped portion, and the nut 35 is attached to the male screw portion 11c of the shaft portion 11a in which the notch 11b is engraved. Is screwed,
A collar 36 is inserted between the upper member 34a and the lower member 34b of the second cross member 34 so as to surround the shaft portion 11a and form a gap, and is formed on the head 11d in the same manner as in the above example. Broken module in the cavity
Ten pressure cartridges 10a and a booster mechanism 10b are incorporated.

As shown in FIG. 4, the sensor 18 (or
19) and 20) are input to the control unit 21. The control unit 21 performs arithmetic processing based on the detection signal. When the set value is reached, the control unit 21 issues an operation signal. Is supposed to work. The power supply of the control unit 21 is an on-board power supply 38 and the ignition switch 39 is turned on.
It is supplied when it is set.

[0015] As shown in FIG.
The detection signals of the three sensors 18, 19, 20 may be input to 21. In this case, for example, the control unit 21 is caused to stand by by the detection signal of the sensor 18, and then the sensor 19
And 20 or sensors 19 and 20.
However, these are just examples, these sensors 1
Of course, there is no limitation on the combination of 8, 19 and 20.

Next, the operation will be described. When the vehicle collides with the front, the bumper 17 retreats abruptly in the circuit of FIG. 4, and the sensor 18 generates a detection signal (or the center member 5 is deformed while retreating, and the sensors 19 and 20 generate detection signals).
Then, the control unit 21 performs an arithmetic process on the basis of the detection signal, and when a predetermined value is reached, an operation signal is issued and the destruction module 10 operates. This operation is performed in the circuit of FIG.
The same operation is performed when a detection signal is generated from the sensors 18, 19, and 20 and reaches a predetermined value. Thus, when the breaking module 10 operates, the shaft 11a of the mounting bolt 11 breaks and separates from the notch 11b. As a result, the center member 5 is unbound and retreats, and the power plant 2 supported by the center member 5 also retreats, that is, falls off from a predetermined position.

In this case, the vehicle collision is detected by sensors 18, 19,
Since the power plant 2 is dropped immediately upon detection of the power plant 2, the collapsed space of the front vehicle body structural member is expanded, and the amount of collision energy absorption is increased. As a result, the size and weight of the vehicle body can be reduced.

[0018]

As described above, according to the present invention, the vehicle body strength member supporting the power plant is mounted on another vehicle body strength member or the vehicle body with the mounting bolts, while the front body structural member is properly positioned. A sensor for detecting the collision of the vehicle is attached, a control unit to which a detection signal of this sensor is input is provided, and a destruction module that operates according to an operation signal issued from the control unit and destroys the mounting bolt is built in the mounting bolt, The collapsing space of the front vehicle body structural member is enlarged, the amount of collision energy absorption is increased, and the effect of reducing the size and weight of the vehicle body is obtained.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a front portion of a vehicle showing one embodiment of the present invention.

FIG. 2 is a sectional view of the mounting bolt portion.

FIG. 3 is a sectional view showing another example of the mounting bolt part.

FIG. 4 is an electric circuit diagram of the device of the present invention.

FIG. 5 is another electric circuit diagram.

[Explanation of symbols]

 2 Power plant 5 Center member (body strength member) 10 Destruction module 11 Mounting bolt 12 Torque box panel (other body strength member) 17 Bumper (front body structure member) 18 Sensor 19 Sensor 20 Sensor 21 Control unit

Claims (1)

(57) [Scope of request for utility model registration] 1. A vehicle body strength member supporting a power plant is attached to another vehicle body strength member or a vehicle body by a mounting bolt, and a sensor for detecting a collision of a vehicle is mounted at an appropriate position of a front vehicle body structural member. A power plant dropout device for an automobile, comprising: a control unit to which a detection signal is input; and a destruction module that operates according to an operation signal generated from the control unit and breaks the mounting bolt.