JP3795306B2 - Vehicle hood device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a hood device for a vehicle.
[0002]
[Prior art]
Japanese Unexamined Patent Publication No. 9-315266 “Vehicle Hood Device” is known as a vehicle hood device.
According to FIG. 1 of the same publication, the above technology informs the control device 17 that an obstacle has been detected by the pedestrian collision detection sensor 15 attached to the front bumper 14 (the reference numeral is the same as that used in the publication). The vehicle hood device 11 is configured to lift the hood 13 by the hood lifting and holding mechanism 16 based on the information from the control device 17 and hold the hood 13 at the position, as shown in FIG. A hook 30 is provided on a rod 29 of the hood lifting and holding mechanism 16 (hereinafter referred to as an actuator), and the hood 12 is held by locking the hook 30 to the vehicle body 12 side. Further, as shown in FIG. 3 of the publication, the hook 30 is fixed to the rod 29 by a support pin 31 so as to be rotatable and is urged by a compression spring 32.
[0003]
[Problems to be solved by the invention]
However, the actuator is provided with a hook 30 on the rod 29 and the hood 12 is held by locking the hook 30 to the vehicle body 12 side, so depending on the work of attaching the actuator to the vehicle body 12, The hook 30 is deeply engaged in the locked state or the hook 30 is slightly engaged, causing variations in the locked state of the hook 30 and reducing the reliability of the locking action.
Further, it is difficult to assemble small parts such as the hook 30, the support pin 31, or the compression spring 32 on the rod 29, and the assembling property of the actuator is poor.
[0004]
SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle hood apparatus that does not cause a variation in the locked state during the mounting operation of the actuator, and improves the assembly of the actuator.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to a first aspect of the present invention, there is provided a vehicle hood device including an actuator that lifts the vehicle hood by a predetermined amount when a contact object hits the vehicle. The actuator includes an actuator block and the actuator block. A cylinder part opened at one end, a piston pin inserted from one end of the cylinder part, a gas generator disposed at the other end of the cylinder part to raise the piston pin at a high speed, and the raised piston pin coming out of the cylinder part a piston stop member provided on one end of the cylinder portion so as not, a lock piece piston pin ceased by the action of the piston stop member is mounted protrudes into the extendable and normal cylinder portion into the cylinder portion so as not-lowered , a cylinder portion with opened in order to pressure equalization between the front and back in the lock piece to the lock piece A pressure equalizing hole that is positioned intermediate upper and resiliently extruded resilient member locking piece to the cylinder unit, consists, piston pin was increased by the gas from the gas generator the lock piece and the contact with the lock piece Passing while moving backward, and after the piston pin ascends and lifts the vehicle hood, the vehicle hood does not drop due to the locking action caused by the lock part of the lock piece coming into contact with the lower end of the piston pin It is characterized by.
[0006]
A lock piece is provided so as to protrude into the cylinder part. When an abutting object hits the vehicle, the piston pin is raised at a high speed by the gas generator, and the vehicle hood is lifted by a predetermined amount by the actuator. Immediately after this, the lock piece is projected to the cylinder portion to prevent the piston pin from descending so that the vehicle hood does not fall.
[0007]
A lock piece is attached to the actuator so that the piston pin can protrude into the cylinder so that the piston pin does not descend, thereby preventing a variation in the lock state during the actuator installation work. Further, the assembly of the actuator is improved by providing the actuator block with a lock piece and a resilient member.
By providing a pressure equalization hole in the lock piece to open the lock piece and to be positioned in the middle upper part of the cylinder part in order to equalize the pressure on the front and back, the pressure on the front and back of the lock piece can be made uniform. it can. That is, it is made not to be affected by the gas pressure generated by the gas generator, and the operation speed of the lock piece is increased to speed up the lock action of the lock piece.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. “Front”, “Rear”, “Left”, “Right”, “Up”, “Down” follow the direction seen from the driver, Fr is front, Rr is rear, L is left, R is right Indicates. The drawings are to be viewed in the direction of the reference numerals.
[0009]
FIG. 1 is a perspective view of a vehicle equipped with a vehicle hood device according to the present invention. 10 is a vehicle, 11 is a vehicle body, 12 is a front bumper, 13 is a radiator grille, 14 is a front fender, 15 and 15 are front pillars, Reference numeral 16 denotes a windshield, 17 denotes a door, 18 denotes a roof, 19 denotes a front wheel, 20 denotes a vehicle hood device, and 40 denotes an actuator of the vehicle hood device 20.
As described below, the vehicle hood apparatus 20 is an apparatus that improves the assembly of the actuator 40 without causing variations in the locked state of the actuator 40 during the mounting operation of the actuator 40.
[0010]
FIG. 2 is a principle diagram of a vehicle hood device according to the present invention. The vehicle hood device 20 includes a vehicle hood 21 that covers the front portion of the vehicle body 11 and left and right hinges that open and close the vehicle hood 21. 22L, 22R (only 22L shown), actuators 40, 40 for lifting the vehicle hood 21, a detection sensor 23 for detecting that the abutting object M has hit the front bumper 12, and information from the detection sensor 23 The control unit 24 operates and controls the actuators 40 and 40 based on the above. The detection sensor 23 is preferably an acceleration sensor.
[0011]
FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 1 and shows a side cross section of the vehicle hood 21 and a side surface of the hinge 22L.
The vehicle hood 21 includes an outer panel 26 that serves as an exterior, and an inner panel 27 that reinforces the outer panel 26 under the outer panel 26.
The hinge 22L includes a hinge base 31 that is fixed to the vehicle body 11, a first link 32 that is rotatably attached to the hinge base 31 via a pin 36a, and a pin 36b that is connected to the other end of the first link 32. The second link 33 is rotatably attached at one end, and the hood attachment stay 34 is rotatably attached to the other end of the second link 33 via a pin 36c. Reference numerals 37 and 37 are bolts for attaching the hinge base 31 to the vehicle body 11, and 38 and 38 are bolts for attaching the vehicle hood 21 to the hood mounting stay 34.
The hinge 22R (see FIG. 1) is symmetrical with the hinge 22L with respect to the center of the vehicle 10, and detailed description thereof is omitted.
[0012]
4 is a cross-sectional view taken along line 4-4 of FIG.
The actuator 40 includes an actuator block 41 attached to the vehicle body 11 (see FIG. 2), a cylinder portion 42 opened in the actuator block 41, a piston pin 43 inserted from one end 42a of the cylinder portion 42, and the piston pin 43 Gas generator 44 disposed at the other end 42b of the cylinder portion 42 and a piston stopper 45 provided at one end 42a of the cylinder portion 42 so that the raised piston pin 43 does not come out of the cylinder portion 42. A lock piece 46 that is attached to the cylinder portion 42 so that the piston pin 43 stopped by the action of the piston stop member 45 does not descend, and a bullet that elastically pushes the lock piece 46 to the cylinder portion 42. It consists of a compression spring 47 as a generating member.
Reference numeral 49 denotes a bush that receives the compression spring 47, and reference numeral 41a denotes a cylindrical portion that is opened in the actuator block 41, and is a portion that collectively stores the lock piece 46, the compression spring 47, and the bush 49. Reference numeral 60 denotes a lock mechanism described later.
[0013]
The actuator block 41 is a block formed of an aluminum-based alloy or an iron-based alloy for attachment to the vehicle body 11 (see FIG. 1), and the cylinder portion 42 is a substantially cylindrical portion formed in the actuator block 41.
The piston pin 43 has a piston 52 attached to one end of a piston pin main body 51 and a piston 53 to be slid while sliding against the cylinder portion 42 attached to the other end of the piston pin main body 51. 53 a is a taper portion of the piston 53.
[0014]
The gas generator 44 includes a lid member 44a in the actuator block 41 and a gunpowder (not shown) for generating gas.
The piston stopping member 45 is a member that guides the piston pin 43 and seals the cylinder portion 42.
[0015]
FIG. 5 is an exploded perspective view of the lock mechanism of the hood device for a vehicle according to the present invention. As described above, the lock mechanism 60 has the cylinder portion 42 so that the piston pin 43 (see FIG. 4) does not descend. A lock piece 46, which is attached so as to be able to project to the cylinder portion 42, a compression spring 47 which elastically pushes the lock piece 46 to the cylinder portion 42, and a bush 49 which receives the compression spring 47. 46, the compression spring 47, and the bush 49 are collectively stored in the cylindrical portion 41a of the actuator block 41 (see FIG. 4).
[0016]
The lock piece 46 includes a lock portion 46a as a front surface for stopping the piston 53 of the piston pin 43 (see FIG. 4), a slide portion 46b to be slid on the cylindrical portion 41a , and a spring hook portion as a back surface on which the compression spring 47 is hung. 46c and the lock part 46a, the sliding part 46b, and the spring hook part 46c are penetrated, and it comprises the pressure equalization hole 55 which makes the lock piece 46 equalize the pressure of the lock part 46a and the spring hook part 46c. is there.
The compression spring 47 is a member that supports the lock piece 46 and causes the cylinder piece 42 to project the lock piece 46.
The bush 49 includes a press-fit portion 49 a that is press-fitted into the tubular portion 41 a and a spring hooking portion 49 b that hooks the compression spring 47.
[0017]
Here, returning to FIG. 4, the characteristics of the vehicle hood device 20 are summarized. When the vehicle M (see FIG. 2) hits the vehicle M (see FIG. 2), the vehicle hood device 20 places a predetermined amount of the vehicle hood 21. In a vehicle hood apparatus including an actuator 40 to be lifted, an actuator block 41 attached to the vehicle body 11 (see FIG. 2), a cylinder portion 42 opened in the actuator block 41, and a piston inserted from one end 42a of the cylinder portion 42 A pin 43, a gas generator 44 disposed at the other end 42b of the cylinder portion 42 to raise the piston pin 43 at high speed, and one end of the cylinder portion 42 so that the raised piston pin 43 does not come out of the cylinder portion 42. The piston stop member 45 provided on 42a and the piston pin 43 stopped by the action of the piston stop member 45 are lowered. A lock piece 46 that is attached to the cylinder portion 42 so as to protrude, and a pressure equalizing hole 55 formed in the lock piece 46 to equalize the lock portion 46a and the spring hook portion 46c. The lock piece 46 is composed of a compression spring 47 which elastically pushes the cylinder piece 42. After the piston pin 43 is lifted and lifts the vehicle hood 21, the vehicle hood is moved by the locking action of the lock piece 46. It can be said that it did not fall.
[0018]
That is, the vehicle hood device 20 is provided with the lock piece 46 so as to be able to protrude into the cylinder portion 42. When the abutting object M hits the vehicle 10 (see FIG. 2), the piston pin 43 is raised at a high speed by the gas generator 44 and the vehicle hood 21 is lifted by a predetermined amount by the actuator 40. Immediately after this, the lock piece 46 is protruded into the cylinder portion 42 to prevent the piston pin 43 from descending so that the vehicle hood 21 does not fall.
[0019]
By attaching a lock piece 46 to the actuator 40 so that the piston pin 43 can protrude into the cylinder portion 42 so that the piston pin 43 does not move down, for example, compared with the case where the piston pin 43 is locked on the vehicle 10 (see FIG. 2) side. In addition, it is possible to prevent the lock state from being varied in the mounting operation of the actuator 40. Further, by providing the actuator block 41 with the lock piece 46 and the compression spring 47, for example, the assembly of the actuator 40 can be improved compared to the case where the lock piece 46 and the compression spring 47 are provided on the piston pin 43 side. Can do.
[0020]
By providing a pressure equalizing hole 55 in the lock piece 46 to equalize the pressure between the lock portion 46a and the spring hook portion 46c, the pressure of the lock portion 46a and the spring hook portion 46c of the lock piece 46 can be equalized. it can. That is, it is possible to speed up the locking operation of the lock piece 46 by increasing the operating speed of the lock piece 46 without being affected by the gas pressure generated by the gas generator 44.
[0021]
As a result, since there is no variation in the locked state during the mounting operation of the actuator 40, the highly reliable vehicle hood device 20 can be realized. Further, by improving the assembling property of the actuator 40, the cost of the actuator 40 can be reduced, and the vehicle hood device 20 can be manufactured at a low cost. Furthermore, by providing the pressure equalizing hole 55 in the lock piece 46 of the actuator 40, the reliability of the vehicle hood device 20 can be further improved.
[0022]
Next, the operation of the vehicle hood apparatus 20 described above will be described.
6 (a) to 6 (c) are operation explanatory views of the hood device for a vehicle according to the present invention, and show an operation sequence of the actuator 40. FIG.
In (a), the actuator 40 is in a state before the operation, and the rod 43 is in a state of being housed in the cylinder part 42. In addition, the lock piece 46 is in a state of being protruded from the cylinder portion 42.
[0023]
In (b), the gas generator 44 is operated, the rod 43 is raised as shown by the arrow (1), and the vehicle hood 21 is raised as shown by the arrow (2). At this time, the lock piece 46 is moved backward as indicated by the arrow (3) by the tapered portion 53a of the piston 53. That is, it does not prevent the piston pin 43 from rising.
[0024]
In (c), the piston 53 of the piston pin 43 hits the piston stop member 45, and the piston pin 43 stops. At the stop position of the piston pin 43, the lower end 53b of the piston 53 is already positioned on the lock piece 46. Therefore, the lock piece 46 returns as indicated by the arrow (4) by the elastic action of the compression spring 47. That is, since the lock portion 46a of the lock piece 46 protrudes from the lower end 53b of the piston 53, the piston pin 43 is locked by the lock action of the lock piece 46, and the vehicle hood 21 does not descend, and the vehicle hood 21 Can keep the lifted state at the stop position of the piston pin 43.
[0025]
Further, since the pressure equalizing hole 55 is provided in the lock piece 46 in order to equalize the pressure between the lock portion 46a and the spring hooking portion 46c, the lock piece 46 is not affected by the gas pressure generated by the gas generator 44. be able to. That is, the operation speed of the lock piece 46 can be increased to speed up the lock action of the lock piece 46. As a result, the reliability of the vehicle hood apparatus 20 can be further improved.
[0026]
In the embodiment, as shown in FIG. 3, the vehicle hood device 20 has shown an example in which two actuators 40, 40 are arranged. However, the present invention is not limited to this, and one actuator is arranged. It may be one or three or more actuators may be arranged.
[0027]
【The invention's effect】
The present invention exhibits the following effects by the above configuration.
According to the first aspect of the present invention, the actuator is disposed at the other end of the cylinder portion in order to raise the piston pin at high speed, the actuator block, the cylinder portion opened in the actuator block, the piston pin inserted from one end of the cylinder portion Gas piston, piston stop member provided at one end of the cylinder part so that the raised piston pin does not come off the cylinder part, and the piston pin stopped by the action of this piston stop member to the cylinder part A lock piece that can be protruded and normally protrudes into the cylinder portion, and a pressure equalizing hole that is opened in the lock piece and is positioned above the middle of the cylinder portion in order to equalize the pressure on the front and back of the lock piece, and a lock For example, the piston pin is locked on the vehicle side. Compared to the case of, it can prevent the variation occurs in the locked state in the mounting operation of the actuator. Further, the assembly of the actuator can be improved as compared with the case where the lock piece and the resilient member are provided on the piston pin side.
As a result, since there is no variation in the locked state during the actuator installation operation, a highly reliable vehicle hood device can be realized. Further, by improving the assembly of the actuator, it is possible to reduce the cost of the actuator, and with this, the vehicle hood device can be manufactured at low cost.
[0028]
Further, since there is provided a pressure equalizing hole to be located in the middle above the Rutotomoni cylinder drilled in the locking piece in order to achieve pressure equalization between the front and back to the lock piece, influenced by the gas pressure generated by the gas generator It can be avoided. That is, the operation speed of the lock piece can be increased to speed up the lock action of the lock piece. As a result, it is possible to further improve the reliability of the vehicle hood device.
[Brief description of the drawings]
FIG. 1 is a perspective view of a vehicle equipped with a vehicle hood device according to the present invention. FIG. 2 is a principle view of the vehicle hood device according to the present invention. 1 is a cross-sectional view taken along line 4-4 of FIG. 1. FIG. 5 is an exploded perspective view of a lock mechanism of a vehicle hood apparatus according to the present invention.
DESCRIPTION OF SYMBOLS 10 ... Vehicle, 20 ... Vehicle hood apparatus, 21 ... Vehicle hood, 40 ... Actuator, 41 ... Actuator block, 42 ... Cylinder part, 42a ... One end of cylinder part, 42b ... Other end of cylinder part, 43 ... Piston pin , 44 ... Gas generator, 45 ... Piston stop member, 46 ... Lock piece, 47 ... Elastic member (compression spring), M ... Abutment.

Claims (1)

In a vehicle hood device including an actuator that lifts a vehicle hood by a predetermined amount when an abutting object hits the vehicle,
The actuator includes an actuator block, a cylinder portion opened in the actuator block, a piston pin inserted from one end of the cylinder portion, and a gas generator disposed at the other end of the cylinder portion to raise the piston pin at high speed If, elevated a piston stop member which piston pin is provided at one end of the cylinder portion so as not escape from the cylinder unit, it can project and normal to the cylinder section as a piston pin ceased by the action of the piston stop member is not-lowered A locking piece that protrudes into the cylinder portion, a pressure equalizing hole that is opened in the locking piece and positioned above the cylinder portion in order to equalize the pressure between the front and the back of the locking piece, and the locking piece A resilient member that elastically pushes into the cylinder,
The piston pin raised by the gas from the gas generator abuts on the lock piece and passes while moving the lock piece backward. After the piston pin rises and lifts the vehicle hood, the lock piece is locked. The vehicle hood apparatus is characterized in that the vehicle hood does not fall by a locking action caused when the portion comes into contact with the lower end of the piston pin .

Images