JPS592972Y2 - Automotive door hinge device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automobile door hinge device, and more particularly, to an automobile door hinge using a pinion and a rack.

As vehicle designs become more diverse, the radius of curvature of windshields also increases.

Opening a door equipped with a windshield with a large radius of curvature, especially a rear door, requires the upper part to protrude into the entrance/exit space of the car, which narrows the space for people getting in and out of the car and is therefore dangerous. The above-mentioned problem is avoided by changing the center of rotation of the door when the door is closed and when it is opened.

A conventional structure that satisfies this purpose is, for example, as seen in U.S. Pat. No. 3,594,853, which consists of a lower hinge with a ball joint and an upper hinge with a pair of sector gears connected by a link. This conventional configuration has the disadvantage that it requires a large number of parts and a large number of assembly steps.

Therefore, an object of the present invention is to provide a door hinge device for an automobile that has a simple structure and is easy to manufacture and assemble.

An embodiment of the present invention will be described.

FIG. 1 shows the door 1 in an open state, and the lower hinge 2 and upper hinge 3 are used to tilt the upper part of the door 1 toward the outside by an amount 1 when opening the door, and when closing the door, the door body is rotated. 4 to enable door operation.

The lower hinge 2 has a structure in which a member 5 on the door side and a member 7 fixed to a pillar 6 on one side of the body are connected by a ball joint 8.

The upper hinge 3 includes a rack device 9 and a pinion device 10.
Preferably, the pinion device 10 is fixed to the door side and the rack device 9 is fixed to the body side.

As shown in FIG. 2, when the door is closed, the center line of rotation of the door is a-b, but when the door is open, the center line of rotation changes to a-c.

Note that the imaginary line in FIG. 2 indicates the position of the pinion device 10 when the door is opened.

The rack device 9 includes a portion 12 fixed to a pillar 11 on one side of the body, and opposing flanges 13 extending from the portion.
．． 13', and the flange 13.13' has an elongated hole 1
4 is provided.

A rack 15 is formed at the upper part of one flange 13.

The rack 15 is placed along the center line X-X of the elongated hole 14.

The pinion device 10 has a portion 16 fixed to the door side and a pair of spaced flanges 17, 17' extending from the portion.

A pinion 18 is provided on the upper part of one of the seven flange 17, and the flange 17, 17' is fixed to a pin 19 inserted into the elongated hole 14 of the rack device 9.

As shown in FIG. 3, the rack 15 and pinion 18 are brought into engagement.

In the above-described configuration, the opening operation of the door 1 rotates the door 1 around the ball joint 8 and the pin 19. The pin 19 is guided by the elongated hole 14 and moves to the left as seen in FIG. 3. This movement of the pin 19 is as follows.
The rotation center line a-1) of the door is changed to a-C, and the upper part of the door is tilted forward toward the outdoor side (see Fig. 4).

As is clear from the above, the embodiment of the present invention has a simple configuration in which the rack and the pinion are engaged with each other, and as the engagement of the pinion progresses, the pin that forms the rotation center of the upper part of the door is moved. can be made possible.

[Brief explanation of drawings]

Fig. 1 is a partial perspective view of the vehicle with the door open; Fig. 2 is a view of the door hinge device according to the embodiment of the present invention as seen from the front of the vehicle;
FIG. 3 is a structural diagram of the upper hinge, and FIG. 4 is a diagram showing the state of the upper hinge when the door is opened. In the diagram: 1...Door, 2...Lower hinge, 3...Upper hinge, 9...Rack device, 10...Pinion device , 14...
...Elongated hole, 15...Rack, 18...
Pinion, 19...pin.

Claims (2)

[Scope of utility model registration request] (1) In an automobile door hinge device including an upper hinge and a lower hinge having a ball joint, the upper hinge includes a rack device having an elongated hole;
and a pinion device movable along the elongated hole, one device being fixed to a body and the other device being fixed to a door. (2) The automobile door hinge device according to item (1), wherein the rack of the rack device is arranged along the center line of the elongated hole, and the pinion device is fixed to the door.