JPH10244836A - Structure for joining car door to door torsion bar spring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extend a substantial length of a torsion bar spring in limited space. SOLUTION: A structure for a door and a torsion bar spring has a bracket 24 provided on a car body and for rotatably supporting a middle part 31 of a torsion bar spring 22, an arm 26 provided on a door, and a link 28 joined to the arm such that it can oscillate. An end 44 of the torsion bar spring extending from the bracket has a first bending part 45 bent forward at an outside part of the arm in the direction of the car body, a second bending part 46 bent in the direction of the car body at a front part of the first bending part, and a contact part 47 extending from the second bending part and contacting the link.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure for a door of an automobile and a torsion bar spring for the door.
In particular, the present invention relates to a connection structure of a back door or a luggage door of an automobile and a torsion bar spring connected to the back door or the luggage door to facilitate opening of the back door or the luggage door.

[0002]

2. Description of the Related Art When a torsion bar spring is installed between a luggage door and a vehicle body instead of a hydraulic damper to facilitate opening of the luggage door, as shown in FIG. The end of the spring 10 is bent into a U-shape to form the connecting portion 11, and
The link 13 is swingably connected to the arm 12 attached to the luggage door, and the link 13 and the connecting portion 11 of the torsion bar spring 10 are brought into contact with the contact portion 14. Also, as shown in FIG.
Is bent into an L-shape to form a connecting portion 16, and a contact portion 19 of a link 18 connected to an arm 17
8 and a torsion bar spring 15 are also in contact (Japanese Utility Model Laid-Open No. 1-112284).

[0003] In either case, when a luggage door (not shown) is closed, the arms 12 and 17 move, and the links 13 and 18 are displaced while swinging with this movement, and the torsion bar springs are connected via the connecting portions 11 and 16. 10,
15 torsion force. This torsional force then bears on the weight of the luggage door when the luggage door is opened.

[0004]

The torsion bar spring is required to be appropriately twisted because the torsion force of the torsion bar spring is a restoring force. However, the torsion force generates an internal stress. Must be kept. The torsional force of the torsion bar spring is proportional to the amount of torsion, and increases as the diameter increases and as the length decreases. Therefore, for the same diameter and the same amount of torsion, the shorter the length, the greater the torsional force and the greater the internal stress. Since the elastic limit is constant for the same material of the same diameter, if the length of the torsion bar spring is short, the elastic limit is reached with a small amount of torsion. This means that the torsional force is reduced and the restoring force is reduced. Therefore, it is preferable that the torsion bar spring disposed in the limited space is as long as possible.

[0005] The present invention can extend the substantial length of a torsion bar spring in a limited space.
Provided is a connection structure between an automobile door and a torsion bar spring for a door.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a connecting structure of a vehicle door and a torsion bar spring which is disposed in the width direction of the vehicle body and is fixed to the vehicle body at one end. A bracket mounted to rotatably support an intermediate portion of the torsion bar spring;
The vehicle includes an arm attached to the door and a link swingably connected to the arm. The other end of the torsion bar spring extending from the bracket has a first bent portion bent in the front-rear direction of the vehicle body at a position outside the arm in the width direction of the vehicle body, The vehicle has a second bent portion that is bent in the width direction of the vehicle body at a position in front of or behind the bent portion, and a contact portion that extends from the second bent portion and contacts the link.

[0007] The other end of the torsion bar spring is bent inward in the width direction of the vehicle body at the second bent portion, and the contact portion is located outward of the arm in the width direction of the vehicle body. Is preferably located.

[0008]

The two torsion bar springs are arranged substantially symmetrically with respect to an imaginary plane including an axis extending in the front-rear direction through the center of the vehicle body, and each torsion bar spring is provided with an arm on each side of the door. Related to. One end of the torsion bar spring is fixed to the vehicle body, and the intermediate portion is rotatably supported by the bracket. As a result, when a load is applied from the contact portion with the link, the torsion bar spring is fixed to the first bent portion and the vehicle body. The portion of the torsion bar spring located between the other end and the torsion bar spring is twisted to generate a restoring force. This restoring force bears the weight of the door when the door is opened, and facilitates the opening of the door.

A first bent portion of the torsion bar spring is located outward of the arm in the width direction of the vehicle body, and a torsion bar spring located between the first bent portion and one end fixed to the vehicle body. As a result, the length of the portion receiving the torsional force can be increased. In the conventional connection structure, since the bent portion corresponding to the first bent portion of the present invention is located inward of the arm in the width direction of the vehicle body, the bent portion and one end fixed to the vehicle body are provided. The length of the portion of the torsion bar spring between them was shorter than that of the present invention. According to the present invention, the length of the torsion bar spring can be increased by an amount corresponding to the movement of the first bent portion outward in the width direction of the vehicle body. As a result, more restoring force can be generated.

Since the portion of the torsion bar spring related to the input of the load, that is, the portion from the first bent portion to the terminal at the other end can be located outside the arm in the vehicle body width direction, the door can be moved. There is no need to arrange a link between the arms attached to the left and right sides, and the space between the arms can be widened.
This eliminates, in particular, in the case of a back door, the restriction on the height of the load brought in from the opening of the back door, as a result of the link being inside the arm.

The other end of the torsion bar spring is bent inward in the width direction of the vehicle body at the second bent portion, and the contact portion is located outside the arm in the width direction of the vehicle body. According to this aspect, the ratio of the portion of the torsion bar spring related to the load input occupying in the width direction of the vehicle body can be reduced, and the vehicle compartment space can be effectively utilized accordingly. Further, since the distance between the contact portion and the second bent portion can be reduced, the portion between the second bent portion and the contact portion is deformed by the load transmitted from the door to the contact portion via the link. And the load can be effectively transmitted to the portion of the torsion bar spring that receives the torsional force.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A torsion bar spring, which is arranged in the width direction of a vehicle body and is fixed to the vehicle body at one end,
It can be formed of a 6-9 mm round steel material. The door connected to the torsion bar spring is a back door or a luggage door. An arm is attached to this door, and the arm is swingably connected to the vehicle body. A link is swingably connected to the arm. The torsion bar spring has a portion between one end and the other end, that is, an intermediate portion, rotatably supported by a bracket. 2
The torsion bar springs are arranged substantially symmetrically with respect to an imaginary plane including an axis extending in the front-rear direction through the center of the vehicle body.

[0013] The other end of the torsion bar spring extending from the bracket is bent in the front-rear direction of the vehicle body at a position outside the arm in the width direction of the vehicle body, and forms a first bent portion. In the first bent part,
Depending on the arrangement of the torsion bar spring, the torsion bar spring is bent forward or backward. The other end is further bent in the width direction of the vehicle body at a position forward or rearward of the first bent portion to form a second bent portion. In the second bent portion, it is preferable to bend inward in the width direction of the vehicle body, but it is also possible to bend outward. A portion extending from the second bent portion is a contact portion that contacts the link.

The first bent portion of the torsion bar spring defines the length of the portion of the torsion bar spring to be subjected to the torsional force, and the second bent portion is the moment of the moment transmitted to the portion to be subjected to the torsional force. Determine the arm. In this case, the contact portion functions as a load input point. Since the moment arm is determined by the distance from the first bent portion to the second bent portion, the load input point may be anywhere. In other words, it may be inside or outside the arm in the width direction of the vehicle body. From a practical point of view, when the contact part moves away from the second bent part, the load applied to the contact part causes the contact part to be in contact with the second bent part.
It is preferable that the portion be closer to the second bent portion in order to deform a portion located between the first bent portion and the second bent portion.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The connecting structure between the door 20 and the torsion bar spring 22 of the automobile is shown in FIG. 1 showing a planar state, FIG. 2 showing a side state, FIG. 3 showing a perspective state, and FIG. 7 showing a perspective state in use. For reference, the bracket 24 and the arm 26
And a link 28. Two torsion bar springs 22 are arranged substantially symmetrically with respect to a vertical imaginary plane including a central axis extending in the front-rear direction of the vehicle body, and extend crosswise in the width direction of the vehicle body. Two brackets 24 are respectively arranged on the left and right sides of the vehicle body and attached to the vehicle body. As shown in FIGS. 1 and 7, one end 30 of the torsion bar spring 22 is bent so that its planar shape assumes a U-shape. The bracket 30 with the end 30 of one torsion bar spring 22 on the left side
And the other end 31 of the one torsion bar spring 22 extends toward the bracket 24 on the right side. Further, one end 30 of another torsion bar spring 22 is brought into contact with the contact portion 32 of the bracket 24 on the right side, and the other end 31 of the other torsion bar spring 22 is connected to the bracket 24 on the left side. It is growing towards. The door 2 shown
0 is a back door.

The bracket 24 rotatably supports an intermediate portion of the torsion bar spring 22, and is attached to a roof 36 of the vehicle body. The attachment of the bracket 24 can be by tightening bolts and nuts or by welding. In the illustrated embodiment, the bracket 2
Reference numeral 4 is formed by drawing a plate material, and has a pair of support portions 38 spaced apart in the width direction of the vehicle body. A notch 39 for receiving the torsion bar spring 22 is provided in each support portion 38.
Is provided.

Arms 26 are attached to door 20 on each side of door 20. The arm 26 is inserted into a hollow portion between the pair of support portions 38 of the bracket 24, and the pin 40 is passed through the arm 26 and the bracket 24 and caulked.
The arm 26 is swingably attached to the bracket 24. In the illustrated embodiment, the arm 26 is formed by bending a plate material into a groove shape, and has great rigidity. The portion of the arm 26 located around the pin 40 is bent substantially in an S-shape so that the arm 26 does not interfere with the vehicle body when the door is opened.

The link 28 is connected to the arm 2 by a pin 42.
6, and is swingably connected to the first and second motors. Link 28 is pin 42
A notch 43 is provided at the end opposite to the end. This notch 4
3 receives the torsion bar spring 22. The link 28 is attached to the arm 26 when the arm 26 swings from the closed position of the door 20 to the completely open position.
It is provided that the link 28 can always be engaged with the torsion bar spring 22.

As shown in detail in FIG. 1, the other end 31 of the torsion bar spring 22 extending from the bracket 24 is bent outward in the width direction of the vehicle body from the arm 26 in the longitudinal direction of the vehicle body. First bent portion 4
5, a second bent portion 46 that is bent in the width direction of the vehicle body at a position that is forward or rearward of the first bent portion 45,
A contact portion 47 extends from the second bent portion 46 and contacts the link 28.

In the illustrated embodiment, the other end 31 of the torsion bar spring 22 is bent forward at a first bent portion 45 and inward in a width direction of the vehicle body at a second bent portion 46. It is bent toward. On the other hand, link 2
8 is disposed outward of the arm 26 in the width direction of the vehicle body, and the contact portion 47 of the torsion bar spring 22 is
And is in contact with the link 28.

Referring to FIGS. 5 and 6, which show another embodiment in a planar state and a perspective state, respectively, the other end 54 of the torsion bar spring 22 is provided with a first bent portion 5.
5, and is bent outward at the second bent portion 56 in the width direction of the vehicle body. On the other hand, the link 58 is bent in a crank shape, and is disposed outward of the arm 26 in the width direction of the vehicle body. As a result, the free end portion of the link 58 that is swingably connected to the arm 26 by the pin 42 is spaced apart from the arm 26 outward. The link 58 has a notch 60 on the free end side, and the contact portion 57 of the torsion bar spring 22 enters the notch 60 of the link 58 and is in contact with the link 58. FIG.
The other configurations of the embodiment of FIG. 6 are substantially the same as those shown in FIGS. 1 to 4, and thus detailed description will be omitted.

Next, the operation and effect of the connection structure according to the present invention will be described with reference to the drawings. First, as shown in FIG. 7, the two torsion bar springs 22 are arranged substantially symmetrically with respect to a vertical imaginary plane including an axis extending in the front-rear direction through the center of the vehicle body.
2 engage the arms 26 on each side of the door.

One end 30 of the torsion bar spring 22 is fixed to the vehicle body, and the intermediate portion 34 is rotatably supported by the bracket 24. As a result, the link 28 is displaced as the arm 26 is displaced when the door 20 is closed. Move to the other end 31 of the torsion bar spring 22
Receives a load from the contact portion 47 with the link 28. This load is applied from the second bent portion 46 to the first bent portion 4.
A moment acts on the torsion bar spring 22 with the distance up to 5 as a moment arm. As a result, when the door 20 is closed as shown by the solid line in FIG. 4, the intermediate portion 34 of the torsion bar spring located between the first bent portion 45 and the one end 30 fixed to the vehicle body is screwed. And generate restoring force. This restoring force bears the door weight when opening the door 20 as indicated by the phantom line, and facilitates the opening of the door 20.

As shown in FIGS. 1 and 5, the first bent portions 45 and 55 of the torsion bar spring 22 are located outside the arm 26 in the width direction of the vehicle body. And one end 30 fixed to the vehicle body
As a result, the portion 34 of the torsion bar spring which is located between the torsion bar spring and the torsion force is subjected to the torsional force. On the contrary,
In the conventional connection structure shown in FIGS. 8 and 9, the bent portions 9 corresponding to the first bent portions 45 and 55 of the present invention are used.
Are located inward of the arms 12 and 17 in the width direction of the vehicle body, so that the torsion bar springs 10 and 1 are located between the bent portion 9 and one end fixed to the vehicle body.
The length l of the portion 5 was shorter than the length L. According to the present invention, the length of the torsion bar spring 22 can be increased by an amount (L-1) in which the first bent portions 45 and 55 move outward in the width direction of the vehicle body. As a result, more restoring force can be generated.

In the embodiment shown in FIG.
5 is smaller than that shown in FIG. 5 from the axis of the torsion bar spring 22 to be in contact with the link 28, and the load can be transmitted more effectively. Further, since the terminal 48 of the torsion bar spring 22 is included in the projection plane of the arm 26 in a plan view, the space 7 in the width direction of the body of the arm 26 is formed.
There is no obstacle in 0 that narrows this space.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a connection structure between an automobile door and a torsion bar spring for a door according to the present invention;
The vehicle body panels and doors are omitted.

FIG. 2 is a side view of the connection structure shown in FIG.

FIG. 3 is a partially cutaway perspective view of the connecting structure shown in FIG. 1, showing a state viewed from the rear of the automobile.

FIG. 4 shows a state where the door is opened by a virtual line.

FIG. 5 is a plan view showing another embodiment of the connecting structure of the vehicle door and the torsion bar spring for the door according to the present invention, in which a vehicle body panel and a door are omitted.

FIG. 6 is a perspective view in which a part of the coupling structure shown in FIG. 5 is cut away, and shows a state viewed from the rear of the automobile.

FIG. 7 is a perspective view showing a used state of the torsion bar spring.

FIG. 8 is a plan view showing a conventional connection structure.

FIG. 9 is a plan view showing a conventional connection structure.

[Explanation of symbols]

 Reference Signs List 20 door 22 torsion bar spring 24 bracket 26 arm 28, 58 link 30 one end 44, 54 the other end 45, 55 first bent part 46, 56 second bent part 47, 57 contact part

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazuhide Yanagi 100 Kutoku-cho, Ogaki-shi, Gifu Pref.

Claims (2)

[Claims] 1. A torsion bar spring connected to a vehicle body and a torsion bar spring which is disposed in a width direction of the vehicle body and is fixed to the vehicle body at one end. A bracket rotatably supporting an intermediate portion; an arm attached to the door; and a link swingably connected to the arm, the other end of the torsion bar spring extending from the bracket. A first bent portion bent in the front-rear direction of the vehicle body at a position outward of the arm in the width direction of the vehicle body, and a portion forward or rearward of the first bent portion in the width direction of the vehicle body. Vehicle door and door torsion bar spring having a bent second bent portion and a contact portion extending from the second bent portion and contacting the link. Connection structure with the ring. 2. The other end portion of the torsion bar spring is bent inward in the width direction of the vehicle body at the second bent portion, and the contact portion is moved from the arm in the width direction of the vehicle body. The connecting structure of a vehicle door and a torsion bar spring for a door according to claim 1, which is located outside.