JPH0725364A - Hinge mechanism for trunk lid - Google Patents

Abstract

PURPOSE:To improve the door open operating force characteristics of a trunk lid by enabling the effective length of a link to which a torsion bar is connected, to be increased. CONSTITUTION:A link bracket 16 projecting afterward is provided for a place close to a rotatably support section at the front end of a hinge arm 1, a link 9 is rotatably supported on the aforesaid link bracket 16 by a pin 10 in such a way as to be freely rotated, and the end of the arm section 8a of a torsion bar 8 lockingly attached onto a hook section 7 at the front side of a hinge bracket 5 is lockingly attached to a hook section 11 at the front end of the link 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge mechanism for an automobile trunk lid.

[0002]

2. Description of the Related Art An automobile trunk lid hinge mechanism is provided with a torsion bar, and the torsion spring force of the torsion bar assists the opening of the trunk lid to reduce the door opening operation force. It can be held fully open.

FIGS. 4 to 6 show a conventional hinge mechanism having such a torsion bar. Reference numeral 1 denotes a hinge arm curved into a substantially U-shaped side surface, and a bracket portion 2 at the rear end thereof.
Is fixed to the back surface of the front end of the trunk lid 3 with bolts and nuts.

A hinge bracket 5 is fixed to the vehicle body panel 4 constituting the front edge of the trunk opening edge by bolts and nuts, etc., and the front end of the hinge arm 1 is freely rotatable by a pin 6 on the hinge bracket 5. Is supported by.

A hook portion 7 is formed in a front portion of the hinge bracket 5 below the hinge arm shaft fulcrum, and a torsion bar 8 is attached and supported on the hook portion 7.

A rear end of a link 9 is rotatably supported by a pin 10 at a position in the vicinity of a front end shaft supporting portion of the hinge arm 1, and a hook portion 11 formed at the front end thereof has an end of the torsion bar 8 thereon. The end of the bent arm portion 8a is engaged, and the torsion spring force of the torsion bar 8 urges the hinge arm 1 to rotate upward, so that the trunk lid 3 can obtain a door opening assisting force. There is.

In FIGS. 4 and 5, 12 is a strut tower, 1
Reference numeral 3 indicates a rear suspension.

This similar structure is, for example, the actual Kaihei 1-709.
No. 77 publication.

[0009]

FIG. 7 shows the trunk lid 3 when the effective length of the link 9, that is, the dimension between the pivotal support point of the link 9 and the engagement point of the arm portion 8a of the torsion bar 8 is changed. It shows the opening operation force characteristics of
Indicates an effective length of 100 mm, b indicates an effective length of 105 mm, and c indicates an effective length of 110 mm.
The case of mm is shown.

As is clear from this characteristic diagram, if the effective length of the link 9 is long, the door opening operation force characteristic of the trunk lid 3 is improved and the operation force can be reduced.

However, in the above-mentioned conventional structure, the rear end of the link 9 is directly pivotally supported by the pin 10 on the hinge arm 1, and the standing wall portion 4a of the vehicle body panel 4 connected to the strut tower 12 is provided at the front end of the link 9. While close to each other, it is necessary to secure a sufficient clearance between the front end of the link 9 and the standing wall portion 4a. On the other hand, the hinge center of the hinge arm 1 (the shaft fulcrum by the pin 6) and the curved shape of the hinge arm 1 are required. Is determined by the shape of the trunk lid 3 and the tilt angle of the rear window panel (not shown), the effective length of the link 9 is naturally limited to be short, and it is difficult to improve the door opening force characteristics. Is.

Therefore, according to the present invention, the effective length of the link can be lengthened without changing the hinge center of the hinge arm or the curved shape of the hinge arm, and the door opening operation force characteristic of the trunk lid can be improved. A hinge mechanism for a trunk lid is provided.

[0013]

A front end of a hinge arm having a substantially U-shaped side surface whose rear end is fixed to a trunk lid is pivotally supported on a hinge bracket fixed to a vehicle body panel, and a front end shaft support portion of the hinge arm is supported. The rear end of the link is pivotally supported in the vicinity thereof, the torsion bar is supported at a front position below the hinge arm pivot point of the hinge bracket, and the end of the arm portion bent and formed at the end of the torsion bar is connected to the link. In the structure in which the door lid of the trunk lid is assisted by the torsion bar, the hinge arm is provided with a link bracket projecting rearward at a position near the front end pivotal support portion. The rear end of the link is pivotally supported.

[0014]

Since the rear end of the link is pivotally supported by the link bracket which is provided on the hinge arm so as to project rearward, the linking point between this pivot point and the engagement point at the arm end of the torsion bar at the front end of the link is The effective length of the link can be set arbitrarily long.

As a result, the door opening operation force characteristic of the trunk lid can be improved and the door opening operation force can be reduced.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings by assigning the same reference numerals to the same parts as those in the conventional structure.

1 to 3, reference numeral 1 denotes a hinge arm which is curved in a substantially U-shape on a side surface, and a rear end bracket portion 2 thereof is fixed to a rear surface of a front end portion of a trunk lid 3 with bolts and nuts 14.

A hinge bracket 5 is fixed by bolts and nuts 15 to the vehicle body panel 4 which constitutes the front edge of the trunk opening edge. The front end of the hinge arm 1 is fixed by a pin 6 to the upper end of the center of the hinge bracket 5. It is pivotally supported.

A hook portion 7 is formed at a front portion of the hinge bracket 5 below the hinge arm axis fulcrum, and a torsion bar 8 is attached and supported on the hook portion 7.

A link bracket 16 protruding rearward is joined to the hinge arm 1 at a position in the vicinity of a front end shaft supporting portion, and a rear end of the link 9 is rotatably supported by a pin 10 on the link bracket 16. I am doing it.

Then, the end of the arm portion 8a bent at the end portion of the torsion bar 8 is engaged with the hook portion 11 formed at the front end of the link 9, and the hinge arm 1 is formed by the torsion spring force of the torsion bar 8. The urging force is upwardly applied to the trunk lid 3 to obtain the door opening assisting force.

According to the structure of the above embodiment, the torsion spring force of the torsion bar 8 is applied to the hinge arm 1 via the link 9.
As described above, the trunk lid 3 is provided with a door opening assisting force.

Here, the rear end of the link 9 is the hinge arm 1
Since it is pivotally supported by the link bracket 16 which is provided so as to project rearward, the pivotal support point (pin 10 connecting point),
The effective length of the link 9 connecting the hook portion 11 at the front end of the link 9 and the engagement point between the end of the arm portion 8a of the torsion bar 8 can be increased.

As a result, the door opening operation force characteristic of the trunk lid 3 can be improved and the door opening operation force can be reduced.

[0025]

As described above, according to the present invention, since the rear end of the link is pivotally supported by the link bracket provided on the hinge arm so as to project rearward, the link bracket is provided between the front end of the link and the vehicle body panel. Even when a predetermined clearance is secured, the effective length of the link can be arbitrarily set, and therefore, the trunk lid opening operation force characteristics are improved, and the trunk lid opening operation force is improved. It has the advantage that it can be lightened.

[Brief description of drawings]

FIG. 1 is a sectional explanatory view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same embodiment.

FIG. 3 is a perspective view of a hinge arm of the same embodiment.

FIG. 4 is a schematic perspective view showing the vicinity of a hinge mechanism arrangement portion.

5 is a schematic cross-sectional explanatory view taken along the line AA of FIG. 4 showing a conventional structure.

FIG. 6 is a perspective view of a hinge arm having the conventional structure.

FIG. 7 is a characteristic diagram of a door opening operation force of the trunk lid.

[Explanation of symbols]

 1 ... Hinge arm 3 ... Trunk lid 4 ... Vehicle body panel 5 ... Hinge bracket 8 ... Torsion bar 8a ... Torsion bar arm 9 ... Link 16 ... Link bracket

Claims (1)

[Claims] 1. A front end of a substantially U-shaped hinge arm having a rear end fixed to a trunk lid is pivotally supported on a hinge bracket fixed to a vehicle body panel, and is linked to a position near a front end pivotal support portion of the hinge arm. The rear end of the link is pivotally supported, the torsion bar is supported below the hinge arm pivot point of the hinge bracket, and the arm end bent and formed at the end of the torsion bar is engaged with the front end of the link. In this structure, a hinge bar is provided with a link bracket that projects rearward at a position near the front end shaft support of the hinge lid, and the link bracket of the link is attached to the hinge arm. A hinge mechanism for the trunk lid, with the rear end pivotally supported.