JPS63142177A - Opening and closing body support structure using gas damper stay - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to opening/closing bodies such as back doors, luggage doors, side doors, and hoods that are pivotally supported in an openable/closable manner on the main body of an automobile. The present invention relates to an opening/closing body support structure using a preferable gas damper stay.

[Prior Art] In an opening/closing body support structure using a gas damper stay applied to an automobile, an opening/closing body that is pivotally supported by the vehicle body and can be opened/closed is provided between the vehicle body and the opening/closing body. A gas damper stay biases it in the opening direction to improve opening and closing operability.

With this gas damper stay, if the gas pressure changes due to a change in the environmental temperature, the stay reaction force will change and the desired opening/closing operability will not be achieved. Various methods have been proposed.

For example, in Utility Model Application No. 52-20616, a crank-shaped support member is provided at one end of the gas damper stay supported by the opening/closing body and at the other end, and this support member can be fixed at a plurality of predetermined rotation angles. A configuration in which it is supported on the vehicle body has been proposed. With this configuration, the rotation angle of the support member changes in response to changes in environmental temperature, thereby changing the supporting position of the gas damper stay on the heavy body side, and changing the stay reaction force by changing the moment arm. They are meant to cancel each other out.

However, the above configuration has the disadvantage that the rotation angle of the support member must be changed manually, making the operation difficult. Furthermore, it is difficult to judge when to perform this operation, and when a large number of fixing positions are set for the support member, it is extremely difficult to judge which position to fix the support member to.

[Problems to be Solved by the Invention] In view of item -F, the present invention provides temperature compensation for the gas damper stay by automatically changing the support position of the gas damper stay to an optimal position in response to changes in environmental temperature. The purpose of the present invention is to provide an opening/closing body support structure using a gas damper stay that allows for

[Means for Solving the Problems] The present invention has a structure in which an opening/closing body that is pivotally supported by a main body and can be opened and closed is urged in the opening direction by a gas damper stay provided between the main body and the opening/closing body. In an opening/closing body support structure using a supporting gas damper stay, the gas damper stay is supported on the main body or the opening/closing body so that its axis can move toward and away from the pivot support on the main body of the opening/closing body, and A temperature compensation device is connected to the gas damper stay via a rack-and-pinion mechanism that doubles the stroke and is activated by temperature changes to move the gas damper stay in the aforementioned direction.

[Function] In the present invention having the above configuration, when the environmental temperature changes, the temperature compensator operates to change the support position of the gas damper stay on the main body side or the opening/closing body side, thereby reducing the moment arm around the shaft support of the opening/closing body on the main body. Vary the length. This results in
Changes in the stay reaction force of the gas damper stay are offset by changes in the moment arm length, so that a substantially constant moment always acts on the opening/closing body regardless of changes in the environmental temperature.

At this time, the operation stroke of the temperature compensator is increased by the action of the rack and pinion mechanism and is transmitted to the gas damper stay.

[Example] Figures 1 to 6 show examples of an opening/closing body support structure using a gas damper stay according to the present invention applied to a back door of an automobile. Direction indicates the front of the vehicle, arrow UP force direction ・1 (both indicate upward, arrow I
The N direction indicates the inside in the vehicle width direction.

: As shown in the JSO diagram, the upper end of the back door 10, which is an opening/closing body, is pivotally supported at the rear end of a roof part (not shown) via a hinge (not shown), and the hinge center HC
It is attached to the main body of the vehicle so that it can be opened and closed around the axis.

The tip of a piston rod 14 of a gas damper stay 12 is pivotally supported on the back door 10. The gas damper stay 12 has a well-known A configuration, in which a piston placed in a cylinder tube 16 is urged by the pressure of gas sealed in the cylinder tube 16 and is fixed to the piston 1171.
A piston rod 14 extends from the cylinder tube 16.

The cylinder tube 16 of this gas damper stay 12 is attached to the support body 2o via a ball joint 18. As shown in FIGS. 1 to 14, the support 20 has a flange plate 22 and a flange plate 22 facing each other.
A main body part 26 is composed of a pair of body plates 24 welded to a quarter pillar inner 34 in which a flange plate 22 is welded to a quarter pillar 32 via a port 28 and a nut 3o. It is arranged in the space formed between the quarter pillar 32 and the quarter pillar inner 34.

In the main body part 26, a shoe 38 is provided in a guide groove 36 formed by the flange plate 22 and the pair of podium plates 24.
are slidably fitted. The ball handle 18 passes through the through holes 42 and 44 formed in the quarter pillar inch 34 and the flange plate 22, and the zero ball joint 18 (f) which is screwed onto the shoe 38 is inserted into the guide groove 36. By sliding, it moves on a straight line C connecting points A and B in Fig. 6. Hitting the straight line C, the trajectory of the ball joint l8 is such that the backdoor lO is the first The ball joint 18 is fully opened as shown by the two-dot chain line in Figure 6, and the ball joint 18 is connected to point A and point B.
It is set to be perpendicular to the axis ticL of the gas damper stay 12 when located at point D, which is the midpoint between the two points.

A protruding piece 46 is integrally formed on the shoe 38, and a first rack 50 is fixed to this protruding piece 46 via a pin 48. The first rack 50 is a pair of podium plates 2
4 through a pin 52. The first rack 50 and the second rack 54 are engaged with a pinion 56 disposed between them. The pinion 56 is pivotally supported by a shaft 58. Both ends of the shaft 58 pass through elongated holes 60 formed in the pair of body plates 24 and are pivotally attached to a fork-shaped bracket 62 on the outside of the main body 26 . Bracket 62
is fixed to one end of a piston rod 66 of a temperature compensating stay 64 which is a temperature compensating device.

As shown in FIG. 5, the temperature compensation stay 64 has an inner cylinder tube 70 coaxially fixedly disposed inside an outer cylinder tube 68, and a piston 72 sliding in the axial direction inside the inner cylinder tube 70. They are fitted freely. The piston 72 has the piston rod 66
The other end is fixed, and the piston rod 66 passes through the seal member 74 and is pulled out to the outside of the outer cylinder tube 68.A piston rod 66 is formed between the outer cylinder tube 68 and the inner cylinder tube 70. When the temperature rises, a chamber 80 is formed between the piston rod 66 and the inner ring tube 70, which is communicated with the chamber 76 through a through hole 78 formed in the inner ring tube 70. It is filled with expanding oil. Further, an inner ring tube 7 partitioned from the chamber 80 by a piston 72
A chamber 82 formed within the chamber 82 is filled with high pressure gas.

As a result, the piston 72 is urged by the high-pressure gas in the direction in which the piston rod 66 extends from the seventh cylinder tube 68, but at the same time, the oil is compressed, so movement in that direction is restricted. Since the volume of oil changes depending on the temperature change, the moving position of the piston 72 changes depending on the environmental temperature, and the length of the piston rod 66 extending from the outer cylinder tube 68 changes. The temperature compensation stay 64 is a ball joint 8 fixed to an end cap 84.
It is attached to the vehicle body via 6.

The gas damper stay 12 is attached to the first rack 50. The piston rotor 6 is connected to the 7 through the second rack 54 and pinion 56
The gas sealed in the chamber 82 is set at a pressure that does not push the piston rod 66 into the outer cylinder tube 68 and change the overall length of the temperature compensation stay 64. has been done. The temperature compensation stay 64 has an environmental temperature of 20°C.
In this state, the ball joint 18 has a full length such that it is located at point D in FIG. Further, the temperature compensation stay 64 has a total length such that the ball joint 18 is located at point A in FIG. is closer to the hinge center HC than when it is located at point D. Furthermore, the temperature compensation stay 64 has a total length such that the ball joint 18 is at point B in FIG. 18 is further away from the hinge center HC than when it is located at point D.

Since the position of the ball joint 18 changes as described above due to a change in the overall length of the temperature compensation stay 64, the environmental temperature
Hinge center HCL that rotates the back door 10 at 0°C and -30°C! '117) Moment) The moment arms of M are respectively LO when the door 10 is fully open.
, L1. It is L2. This moment arm LO
, L1, and L2 are the biasing forces of the gas damper stay 12 when the environmental temperature is 20°C, 70°C, and -30°C.
, F2, and is set so that the moment M is approximately the same at each temperature as shown in equation (1) below.

With this setting, the moment) M remains approximately the same at any environmental temperature between 70°C and -30°C.

M=LOXFO=, LIXFl Award L2XF2・+1ψ・
-(1) Furthermore, when the back door IO is fully open, the moment arms increase to Lot, L11, and L21 at each temperature, and the biasing force of the gas damper stay 12 increases to FOI and F2, respectively.
it, F21, but in this case also the moment l-M at each of the above temperatures and at a temperature between 70°C and -30°C.
are set to be approximately the same as shown in equation (2) below.

M=L01XF01=LllXF11≠L21×F21
・ Fist ・ ・ −(2)
Next, the operation of this embodiment will be explained.

When the environmental temperature is 20°C which is the design temperature.

The ball joint 18 is located at the position shown at point D in FIG. 6, and remains in this position regardless of whether the back door 10 is opened or closed as long as the environmental temperature does not change. When the back door 10 is opened, the gas damper stay 12 moves the piston rod 1 with gas pressure.
4 is extended from the cylinder tube 16,
It is swung about the silicon joint 18 as a fulcrum and urges the back door 10 in the opening direction. As a result, the bank door 10 can be opened with reduced operating force, and also generates an appropriate holding force when closing.

When the environmental temperature rises, the temperature compensation stay 64 moves into the chamber 76.
As the oil sealed in the chamber 80 expands, the piston rod 66 is drawn into the outer cylinder tube 68 against the pressure of the gas sealed in the chamber 82 . As a result, the pinion 56 is moved to the left in FIG. pinion 56
rotates clockwise while meshing with both the first rack 50 and the second rack 54 to move the first rack 50 into the pinion 56.
move in the same direction as the direction of movement. At this time, the first rack 50 is moved a distance twice the distance that the pinion 56 is moved. The ball joint 18 is moved by the movement of the first rack 50, and the axis CL of the gas damper stay 12 is moved in a direction approaching the hinge center HC of the back door IO. As the environmental temperature rises, the biasing force of the gas damper stay 12 increases;
Since the moment arm around the hinge center HC decreases, the moment is maintained at approximately the same level as when the environmental temperature is 20°C.

Further, when the environmental temperature decreases, the oil in the temperature compensating stay 64 contracts, and the piston rod 66 is extended from the outer cylinder tube 68 by gas pressure. As a result, the pinion 56 is rotated and moved counterclockwise to the right in FIG. 3, and the first rack 50 is moved in the same direction as the movement direction of the pinion 56, a distance twice as much as the movement distance of the serpentine 56. The ball joint 18 is moved by the movement of the first rack 50, and the axis CL of the gas damper stay 12 is aligned with the back door lO.
hinge center) is moved in the direction away from the IC. As the environmental temperature decreases, the biasing force of the gas damper stay 12 decreases, but the moment arm around the hinge center HC increases, so the moment is maintained at approximately the same level as when the environmental temperature is 20°C.

In this way, in the opening/closing body support structure using the gas damper stay of this embodiment, the temperature compensating stay 64 and the support body 20 allow the gas damper stay to be supported without any troublesome operations.
The mounting position of No. 2 on the bank door 10 is automatically and steplessly changed to the optimum position t in the range of 70° C. to -30° C. according to the environmental temperature.

In particular, the first rack 50, the second rack 54, and the pinion 56 provided on the support 20 allow the ball joint 18 to be moved twice the distance that the pinion 56 moves. As a result, the temperature compensation stay 64 is made smaller, and the entire support structure is made smaller.

Furthermore, since the movement locus of the ball joint 18 is set as shown by the straight line C in FIG.
angle at full opening).

[Effects of the Invention] As explained above, in the opening/closing body support structure using the gas damper stay according to the present invention, the support position of the gas damper stay can be automatically changed to the optimal position in response to changes in the environmental temperature. This has the effect of temperature-compensating the gas damper stay, and also has the unique effect of being able to downsize the support structure.

[Brief explanation of the drawing]

Figures 1 to 6 show an embodiment of an opening/closing body support structure using a gas damper stay according to the present invention applied to a back door of an automobile, and Figure 1 is a cross-sectional view of the main parts seen from the rear of the vehicle. , Fig. 2 is a view taken along the ■-■ line in Fig. 1, Fig. 3 is a view taken along the m and -m lines in Fig. 1, Fig. 4 is a perspective view of the main parts, and Fig. 5 shows temperature compensation. A sectional view of the stay, and FIG. 6 is a schematic relationship diagram between the gas damper stay and the back door as seen from the side of the vehicle. IO...Back door (opening/closing body), HC...Hinge center, 12...Gas damper stay CL...Axis line. 20... Support body, 34... Quarter pillar inner (main body). 50...1st rack. 54...Second rack, 56...Pinion, 6411...Temperature compensation stay (temperature compensation device).

Claims (1)

[Claims] (1) Opening/closing body support using a gas damper stay that biases and supports the opening/closing body, which is pivotally supported by the main body and can be opened and closed, in the opening direction with a gas damper stay provided between the main body and the opening/closing body. In the structure, the gas damper stay is supported on the main body or the opening/closing body so that its axis can move toward and away from the shaft support on the main body of the opening/closing body, and the gas damper stay is equipped with a rack and 1. An opening/closing body support structure using a gas damper stay, characterized in that a temperature compensator is connected to the temperature compensator which is operated by a temperature change via a pinion mechanism to move the gas damper stay in the aforementioned direction.