JPH04113979A - Trunk lid opening/closing structure for vehicle - Google Patents

Abstract

PURPOSE:To facilitate the fine adjustment of the moment acting in the opening direction of a trunk lid by removably fitting a cushion material covering the contact sections of link members to stoppers restricting the sway displacement of the link members supporting the base end sections of stay dampers. CONSTITUTION:A trunk lid opening/closing structure has hinge members 2 openably supporting a trunk lid 1, a pair of the right and left stay dampers 3 exciting the trunk lid 1 in the opening direction, and link members 4 supporting the front end sections of the stay dampers 3. A stopper 10, which is brought into contact with the upper face of each link member 4 to restrict the lift position of its tip section when the trunk lid 1 is closed, is formed above the installation section of the link member 4, and a cushion material 11 made of a cylindrical rubber member is removably fitted to the stopper 10. The moment A in the opening direction while the trunk lid 1 is closed can be adjusted in the decreasing direction when the thick cushion material 1 is replaced with a thin one.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a trunk lid opening/closing structure for a vehicle that supports a trunk lid that covers the upper part of a trunk compartment so as to be openable and closable.

[Conventional technology]

Conventionally, as shown in Japanese Utility Model Application Publication No. 62-46784, for example, the trunk lid is biased in the opening direction between a hinge arm that supports the trunk lid so that it can be opened and closed, and a hinge bracket attached to the vehicle body. By installing a torsion bar and balancing the biasing force of this torsion bar with the trunk lid's own weight, the operating force when opening the trunk lid is reduced, and the trunk lid is held in the fully open position. A trunk lid opening/closing structure having this structure is known. In this trunk lid opening/closing structure, the trunk lid is biased in the opening direction by the repulsive force that acts according to the torsion of the torsion bar, and due to material strength issues, it is difficult to apply a large load to the torsion bar. The drawback is that it cannot be done. For this reason, the balancer made of the above-mentioned torsion bar cannot be used for a heavy trunk lid.

Moreover, instead of the torsion bar, a stay damper 21 made of a gas stay or the like capable of obtaining a large biasing force is used as a balancer, for example, as shown in FIG. The stay damper 21 has a front end supported by a vehicle body 23 by a hinge bracket 22, and a rear end connected to a hinge arm 24. This supports the trunk lid 26's own weight.

[Problem to be solved by the invention]

The above-mentioned stay damper has the advantage of being able to obtain a large biasing force depending on the pressure of the gas sealed inside, etc., but on the other hand, the amount of moment that acts in the opening direction of the trunk lid depends on the biasing force of the stay damper. There is a problem in that it is difficult to set the angle of the trunk lid in a manner that accurately corresponds to the moment in the closing direction that acts according to the weight of the trunk lid.

That is, when adjusting the magnitude of the moment in the opening direction that acts according to the biasing force of the stay damper, the distance from the hinge center to the line of action of the stay damper is usually adjusted by changing the installation position of the stay damper. In other words, by increasing or decreasing the length of the moment arm, the appropriate moment is adjusted from the closed position to the fully open position of the trunk lid, but with this method, the trunk lid is repeatedly opened and closed. While checking the balance between the moment in this direction and the moment in the closing direction that acts according to the trunk lid's own weight, we finely adjusted the support position of the stay damper supported by the vehicle body and the connection position of the stay damper connected to the hinge arm. Since adjustment is necessary, there is a problem in that the work is complicated.

The present invention has been made to solve the above problems, and by using a stay damper, it is possible to apply a large moment in the opening direction of the trunk lid, and to reduce the magnitude of the moment in the opening direction. ,
To provide a trunk lid opening/closing structure for a vehicle that can be easily and accurately set to a value corresponding to the weight of the trunk lid.

[Means to solve the problem]

The present invention supports a trunk lid so that it can be opened and closed by a hinge member that includes a hinge bracket attached to a vehicle body and a hinge arm attached to a trunk lid, and one end of which is connected to the hinge arm to support the trunk lid. In a trunk lid opening/closing structure for a vehicle that is provided with a stay damper that is biased in the opening direction, a link member that supports the other end of the stay damper is provided, and the base end of this link member is swingable to the vehicle body by a support shaft. A stopper is provided to support the trunk lid and to restrict the swinging displacement of the link member when the trunk lid is closed, and a cushioning material covering the contact portion of the link member is removably attached to the stopper.

[For production]

According to the present invention having the above configuration, since the swinging displacement of the link member supporting one end of the stay damper is regulated by the stopper when the trunk lid is closed, the installation angle of the stay damper in the closed state of the trunk lid is The distance between the line of action of this stay damper and the hinge center is set to a predetermined value. By replacing the cushioning material attached to the stopper and changing the rocking restriction position of the link member, the length of the arm of the moment acting in the opening direction of the trunk lid in accordance with the biasing force of the stay damper can be changed. will be finely adjusted.

〔Example〕

FIG. 1 shows an embodiment of a vehicle trunk lid opening/closing structure according to the present invention. The above-mentioned trunk lid opening/closing structure includes a trunk lid 1 that covers the upper surface of the trunk compartment, hinge members 2 that are disposed on the left and right sides of the front end of the trunk lid 1 and support the trunk lid 1 so as to be openable and closable, and a trunk lid 1 that can be opened and closed. The stay damper 3 includes a pair of left and right stay dampers 3 that are biased in the direction, and a link member 4 that supports the front end portions of the stay dampers 3. The hinge member 2 includes a hinge bracket 6 attached to the vehicle body 5, a so-called swan-neck hinge arm 7 attached to the trunk lid 1, and a connecting pin that connects the hinge arm 7 to the hinge bracket 6. and a hinge center 8.

As shown in FIG. 2, the front end of the hinge bracket 6 is provided with a support shaft 9 that swingably supports the base end of the link member 4. The link member 4 is attached to the vehicle body 5. Moreover, above the installation part of the link member 4,
A stopper 10 that comes into contact with the upper surface of the link member 4 when the trunk lid 1 is closed and restricts the rising position of the tip thereof is formed by cutting and raising a part of the hinge bracket 6, and this stopper 10 has a predetermined thickness. A cushioning material 11 made of a cylindrical rubber member is fitted onto the outside and removably attached.

Further, the stay damper 3 has a front end portion joined to the distal end portion of the link member 4 via a connecting pin 12, and a rear end portion connected to the hinge arm 7 via a connecting pin 13.

The stay damper 3 pushes the hinge arm 7 counterclockwise in the figure around the hinge center 8 to generate a moment that biases the trunk lid 1 in the opening direction. It is configured to balance the closing moment acting clockwise in the figure around the hinge center 8 according to its own weight.

That is, as shown in FIG. 1, the front end of the stay damper 3 is connected to the link member 4 by the connecting pin 12 in the closed position of the trunk lid 1, and the rear end is connected to the hinge arm 7 by the connecting pin 13. The length of the moment arm is set to be L by being connected to and installed at a predetermined angle. Then, as shown in FIG. 3 from the above-mentioned closed position, when the truck and lid 1 are opened and the hinge arm 7 rotates around the hinge center 8, the front end of the stay damper 3 rises, and accordingly, the stay damper 3 line of action is hinge center 8
The length L of the arm is configured such that the length L of the arm gradually approaches . Therefore, the moment in the opening direction acting around the hinge center 8 according to the biasing force of the stay damper 3 reaches its maximum value at the closed position a of the trunk lid 1, as shown by the solid line A in FIG. This position a
The moment value is configured to gradually decrease as the opening angle increases from .

On the other hand, the moment in the closing direction that acts around the hinge center 8 according to the weight of the trunk lid 1 is as shown by the broken line B in FIG.
It gradually increases from the position until the trunk lid 1 reaches the horizontal position, reaches a maximum value at this position, and as the opening angle of the trunk lid 1 increases from this position to the fully open position C. The moment value gradually decreases. Then, the value of the moment A in the opening direction of the trunk lid 1 at the closed position a becomes larger than the value of the moment B in the closing direction by a predetermined amount α, and at the initial opening position d, which will be described later, both moments A, B are set to be equal, and the closing moment B is set to be larger than the opening moment 8 from this initial opening position d to a predetermined opening position e. Further, in the fully open position C of the trunk lid 1, the biasing force and the mounting position of the stay damper 3 are adjusted so that the value of the moment A in the opening direction is larger than the value of the moment B in the closing direction by a predetermined amount β. It is set.

As described above, if the moment A in the opening direction of the trunk lid 1 corresponding to the biasing force of the stay damper 3 is set appropriately in accordance with the moment B corresponding to the own weight of the trunk lid 1, the trunk lid When the trunk lid 1 is unlocked by the locking mechanism (not shown) during the opening operation of step 1, the rear end of the trunk lid 1 is pushed up according to the biasing force of the stay damper 3, and the trunk lid 1 returns to the initial open position. (for example, open up to 5 degrees).

This is because at the closed position a of the trunk lid 1, the moment A corresponding to the biasing force of the stay damper 3 is set to be larger than the moment B corresponding to the trunk lid's own weight by α, so the difference in moments α The rear end of the trunk lid 1 is pushed up in response to
It will swing around and open automatically.

Next, the trunk lid 1 is moved beyond the initial open position d.
When opening the trunk lid 1, hold the rear end of the trunk lid 1 and raise it. When the trunk lid 1 is opened to a position exceeding the open position e, the moment A corresponding to the biasing force of the stay damper 3 becomes larger than the moment B corresponding to the trunk lid 1's own weight. Depending on the biasing force, the trunk lid 1 is displaced to a fully open position C where it is stopped by a stopper (not shown), and due to the moment difference β acting at this fully open position C, the trunk lid 1 is stopped by the stopper and opened. maintained in condition.

Next, in the trunk lid opening/closing structure described above, a case will be described in which the balance between the moment in the closing direction due to the trunk lid 1's own weight and the moment in the opening direction due to the biasing force of the damper stay 3 is adjusted. First, when the trunk lid 1 is fully opened, the trunk lid 1 is held in the open state, and the trunk lid 1 can be moved to the closed state with a light force.
Install 3. That is, the proximal end of the stay damper 3 is adjusted so that the difference β between the moment A in the opening direction due to the biasing force of the stay damper 3 at the fully open position C and the moment B in the closing direction due to the trunk lid 1's own weight is an appropriate value. The balance between both moments A and B is adjusted by setting the mounting position of the tip.

Next, with the trunk lid 1 closed, the locked state is released, and by measuring how much the rear end of the trunk lid 1 rises, the difference α between the two moments A and H at the fully closed position a is determined. It is confirmed whether the initial opening position of the trunk lid 1 caused by the above is in the appropriate range.

For example, when the lock is released, the rear end of the trunk lid 1 rises more than necessary, and it is confirmed that the difference α between the moments A and H at the closed position a is larger than the appropriate value. By replacing the cushioning material 11 attached to the stopper 10 that regulates the swinging displacement of the link member 4 with a thinner one, and changing the position for regulating the rise of the tip of the link member 4, Both moments A.

Finely adjust the balance of B.

That is, by replacing the thicker cushioning material 11 with a thinner one, as shown in FIG.
The link member 4 when the trunk lid 1 is in the closed state
When moving the rise restriction position of the tip of the stay damper 3 upward from the position shown by the solid line to the position shown by the imaginary line and moving the trunk lid 1 from the open state to the closed state, the stay damper 3
The front end of the front end is displaced above the original restriction position. As a result, when the trunk lid 1 is closed, the line of action of the stay damper 3 approaches the hinge center 8, and as a result, the length of the moment arm corresponding to the biasing force of the stay damper 3 decreases from Ll to L2. The moment A in the opening direction when the lid 1 is in the closed state is reduced.

Furthermore, when the above lock is released, the trunk lid 1
If the rear end cannot be raised to the required position and it is confirmed that the moment difference α is smaller than the appropriate value, replace the cushioning material 11 from a thinner one to a thicker one. By shifting the upward restriction position of the tip of the link member 4 downward, the arm length Ll of the moment A in the opening direction in the closed position 1a of the trunk lid 1 is increased, and the moment A in the opening direction is increased. Make it bigger.

In this way, the stopper 10 is provided to restrict the swinging displacement of the link member 4 that supports the base end portion of the stay damper 3 when the trunk lid 1 is closed.
The regulation position of the link member 4 can be changed by changing the thickness of the cushioning material 11 attached to the stay damper 3 in the closed position of the trunk lid 1 by the simple operation of replacing the cushioning material. The magnitude of the moment in the opening direction that acts according to the biasing force can be easily adjusted.

In addition, by preparing in advance a large number of cushioning materials 11 having various thicknesses, the magnitude of the moment can be adjusted to various values, so that changes in weight due to manufacturing errors of the trunk lid 1 can be avoided. The magnitude of the moment can be set in accordance with the above-mentioned conditions. Moreover, by covering the contact portion of the stopper 10 against the link member 4 with the cushioning material 11, the upper surface of the link member 4 is prevented from directly contacting the stopper 10 when the trunk lid 1 is closed, thereby suppressing the generation of noise. can do.

In the above embodiment, a support shaft 9 that supports the base end of the link member 4 and a stopper 10 that restricts the swinging displacement of the link member 4 are provided at the front end of the hinge bracket 6 that supports the hinge arm 7. However, it is also possible to have a structure in which both or one of the support shaft 9 and the stopper 10 is directly attached to the vehicle body 5.

〔Effect of the invention〕

As explained above, the present invention regulates the swinging displacement of the link member that supports the base end of the stay damper when the trunk lid is closed, and the stopper is provided with a cushion that covers the abutting part of the link member. Since the cushioning material is removably attached, just by replacing the cushioning material with one of a different thickness, when opening the trunk lid,
The magnitude of the moment acting in the opening direction can be finely adjusted. Therefore, unlike the conventional method, it is necessary to check the balance between the moment in the opening direction and the moment in the closing direction corresponding to the weight of the trunk lid, and to finely adjust the installation position of the stay damper, which is a complicated task. There is an advantage that the initial opening angle of the trunk lid can be easily and accurately set to an appropriate value without any problems.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the trunk lid opening/closing structure for a vehicle according to the present invention, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIG. FIG. 4 is a characteristic diagram showing the relationship between the opening angle and moment of the trunk lid, FIG. 5 is an explanatory diagram showing the effect of the present invention, and FIG. 6 is a sectional view showing a conventional example. DESCRIPTION OF SYMBOLS 1... Trunk lid, 2 hinge member, 3... Stay damper 4... Link member, 5... Vehicle body, 6
... Hinge bracket, 7... Hinge arm, 8.
...Hinge center, 9...Support shaft, 10...Stopper 11...Cushion material. Figure 3 Patent applicant Mazda Co., Ltd. Agent
Patent Attorney Etsushi Kotani
Long 1) Positive amount Same as Takao Ito

Claims (1)

[Claims] 1. The trunk lid is supported so that it can be opened and closed by a hinge member that includes a hinge bracket attached to the vehicle body and a hinge arm attached to the trunk lid, and one end is connected to the hinge arm to allow the trunk lid to be opened. In a trunk lid opening/closing structure for a vehicle provided with a stay damper that biases the stay damper in a direction, a link member is provided to support the other end of the stay damper, and the base end of the link member is swingable to the vehicle body by a support shaft. A stopper is provided to support the link member and to restrict the swinging displacement of the link member when the trunk lid is closed, and a cushioning material covering the contact portion of the link member is removably attached to the stopper. Trunk lid opening/closing structure.