Patent Grant
7150492
The present invention relates generally to door hinges for a motor vehicle, and more particularly to a double pivot door hinge for permitting a greater than ninety degree opening of a vehicle door.
U.S. Pat. No. 4,719,665 discloses a double pivot hinge for vehicle doors. A first and second latch means are alternately movable between latched and unlatched positions to either latch the hinge arm to one hinge butt mounted to the door to permit a 90-degree movement, or to latch the hinge arm to another hinge butt mounted to the vehicle for 90 to 180 degree movement.
U.S. Pat. Nos. 5,561,887 and 5,685,046 disclose vehicle double pivot door hinges. The door rotates about the vehicle-mounted pivot for a zero to 90 degree movement, the vehicle-mounted pivot being locked releasably in the 90 degree position, for example by a ball detent. Ball detents or cams exterior to the door-mounted pivot keep the door-mounted pivot from moving during the zero to 90-degree action. These ball detents or cams then release to permit the door-mounted pivot to rotate, so that a 90-degree to 180-degree motion can be achieved.
The actual pivots of these double-pivot prior art devices all have the same or no resistance, so that external latches or devices are required to provide the desired movements and braking.
U.S. Pat. No. 5,918,347, assigned to Edscha and hereby incorporated by reference herein, shows a door hinge with a resistance pivot where a locking member acts directly on a cylinder stem having grooves. The reistance pivot can provide for door opening angles up to 270 degrees. However, only a single pivot is provided.
An object of the present invention is to provide a double-pivot door hinge that permits more than a ninety-degree rotation of the door of the vehicle having a simplified and/or reliable construction. Another alternate or additional object is to permit a double-pivot door hinge door hinge to provide various locking positions at various angles over a range of door movement.
The present invention provides a double pivot door hinge for a motor vehicle comprising:
a door connector for connecting to a door of the motor vehicle;
a pillar connector for connecting to a door pillar or body of the motor vehicle; and
a link connected to the door connector at a door-side pivot and connected to the pillar connector at a pillar-side pivot;
a braking resistance of the pillar-side pivot being less than a braking resistance of the door-side pivot during opening.
By having the braking resistances directly at the pivots be different, a simplified and more relaiable construction can result. In the prior art devices, the pivots themselves had similar or no resistances, and the braking resistances were provided exteriorly to the pivots.
Moreover, as a result of the braking resistance of the pillar-side pivot being less that the braking resistance of the door-side pivot, upon opening of the door to a certain intermediate position, for example 90 degrees, the door pivots about the pillar-side pivot while door-side pivot remains fixed.
Preferably, a stop is provided to prevent the pillar-side pivot from rotating past the intermediate position. At this point further pulling of the door with a force greater than the braking resistance of the door-side pivot results in the door-side pivot rotating so that the door can be moved from the intermediate point to a fully open position, for example 180 degrees.
During closing, the braking resistance of the door-side pivot then may be less than the braking resistance of the pillar-side pivot, so that the door-side pivot first rotates to close the door from the fully-opened position to the intermediate position.
Another stop can be provided to prevent the door-side pivot from rotating past the intermediate position as the door is being closed.
The double pivot hinge according to the present invention makes it possible, during opening and closing of the door, to provide for predetermined movement of the door using reistance pivots. Use of further connections exterior to the pivots to provide resistance can be avoided.
The link is preferably a U-shaped link.
Preferably, the door and pillar side pivots include a locking member, such as a needle roller, biased against a hinge pin pivotally received in a gudgeon of the respective door or pillar connector. The pivots are also received in gudgeons of the link.
The pivot resistance mechanism involves a use of a sleeve-shaped cam which has pre-determined notches cut into it to provide door open positions. Preferably, on the cam rides a needle roller, which is forced against the cam by a spring. As the roller rides on the cam during pivotal movement, door braking positions are created as the roller enters into the notches on the cam profile. The braking resistance is achieved when the roller rolls out of the notch. The braking resistance can be modified by the sizes of the notches, and by the sizing of the rollers.
Preferably, each pivot has has a cam with two notches. Three locking positions upon the pivotal movement of the link about the two pivots are thus established: one the fully-closed position of the door (zero degrees), a second at an intermediate position, for example 90° and a third at a fully open position, for example at 180°. When the door is closed at 0°, the pillar-side and the door-side pivot rollers are both in the respective first notches in the cam. When the door is opened to the intermediate position the pillar-side pivot travels so that the roller of the locking mechanism engages a second notch on the pillar-side cam. The door-side pivot remains with its locking mechanism roller in the first notch, due to the larger resistance on the door side pivot.
When the door is opened further from the intermediate position to the fully open position, the door-side pivot travels so that its locking mechanism roller engages the second notch of the door-side cam.
Preferably, a positive stop is also provided, so that the full open door, which may have a tendency to crash to the body in extreme torque applications, avoids travel past the fully open position, or a position slightly past the fully open position.
The different braking resistances can be achieved by different pre-loading of the compression springs, different profiling of the locking member (roller) or of the surface of the respective cam of the hinge pin.
The size and weight of the door often dictates that only one hinge cannot hold the door in position both for rotational and twist rigidity.
A second hinge assembly thus may be provided. The door with two hinge assemblies can provide heavier doors proper support during rotation, the hinge assemblies being positioned with the hinge gudgeons coaxial with each other.
The second hinge assembly may be similar to the resistance hinge according to the present invention, as having two resistance hinges can provide better control and more stiffness and rigidity. However, control of the movement of both the resistance hinge assemblies simultaneously with repetitive results may be difficult from a manufacturing standpoint. To avoid this, the present invention preferably provides the notch-braking mechanism for the one of the hinge assemblies while the other hinge assembly is lock- or resistance-free. The resistance-free hinge has a similar construction to the resistance hinge, with the door and body connectors connected using a U-shaped link at the two gudgeons. The bending stiffness is provided by connecting the resistance hinge and the resistance-free hinge using a rod or connecting element which transmits the controlled movement of the door and the pillar-side pivot of the resistance hinge to the resistance-free hinge assembly.
The two pivot axes of the pillar-side and the door-side pivots preferably are slightly off parallel to each other so as to provide for a door assist. This arrangement of the pivot axes makes it possible, upon pivoting of the door, to have a variable door assist as the door is cycled. Particularly, when the door is being opened from the intermediate to the fully open position, the door assist helps the door to move to the final fully-open position. While in closing mode from the intermediate to the closed position, the door assist aids the door in latching.
Preferably, the planar base of the pillar connector is attached to the outer surface of the pillar, and the planar base of the door connector is attached to the side of the door so that the two base plates are arranged in mutually perpendicular planes.
A particular favorable feature of the invention includes that the double pivot hinge is so secured that it is not visible from the outside, insuring an aesthetic appearance of the vehicle. The hinge remains hidden from an outsider when the door is closed. The sheet panels of the door and the body may be closely aligned with each other with a small gap.
The present invention itself, both as to its construction and its mode of operation, together with additional advantages and object thereof, will be best understood from the following detailed description of a preferred embodiment, in which:
The resistance hinge assembly 20, shown as well in
Pillar connector 21 provides a bore for receiving a pillar hinge pin 24. Pillar hinge pin 24 and the bore define a pillar side pivot 121 of the double pivot hinge 10.
A U-shaped link 23 has bores at its two ends for forming a connection with the respective connectors 21, 22. Pillar hinge pin 24 fits through one bore, so that U-shaped link is connected to pillar connector 21, thereby forming a pillar-side rotational axis 25, about which link 23 can rotate with respect to pillar connector 21.
Door connector 22 also has a bore for receiving a door hinge pin 27, thereby defining a door-side pivot 122. The other bore of link 23 also receives door hinge pin 27, so that link 23 also can rotate about a door-side rotational axis 28.
Pins 24 and 27 are fixed with respect to U-shaped link 23, and rotate with respect to door connector 22 and pillar connector 21.
Link 23 has stops 32, 33 and 34 for limiting movement of link 23. Stops 32 and 34 interact with planar base 39, and stop 33 with a stop pin 30, as will be described.
Hinge pin 24 is fixedly connected to connecting member 40, which is for example a rod. Second resistance-free assembly 60, shown also in
As will be described with respect to
Compression spring 51 is held in a bore of the pillar connector 21, and spring support 153 may be a cap screw that closes the bore and forms the first support for the compression spring 51, which is supported, at its opposite end, against plunger 154. The threaded connection of support 153 permits removal and adjustment of the biasing force of the compression spring 51. The compression spring 51 preferably is formed as a helical coil spring. The bore containing spring 51 extends up to sleeve-shaped cam 160, which is held on pin 24 of connecting member 40 with a spline connection, which locks the cam 160 onto the pin 24. The pin 24 is rigidly connected to the U-link 23 with a slot and a keyway on pin 24. The pin 24 may secured axially using a bolt and nut connection.
Pin 24 allows a rigid connection to U-link 23 and to cam 160. The sleeve-shaped cam 160 is provided with external notches at required locations on the circumference of the cam 160. The notches run in an axial direction and act as checkpoints. As cam 160 rotates the needle roller 155 rides on the cam 160. The geometry of the cam 160 with the notches and any ramps forces the spring to compress and expand rendering different resistant forces for the pivotal movement. Two notches preferably are located at 90° from one another, which gives the braking resistance required by the door at the closed position and at an intermediate 90° open door position.
Door-pivot 122 likewise includes a spring support 52, a compression spring 50, a plunger 53, a needle roller 55, and cam 54. Cam 54 is fixed to pin 27, which is fixed to U-shaped link 23. Two notches are likewise provided on cam 54 for holding the door at the intermediate position and the fully open position, for example, 90° and 180° respectively.
As shown in
As shown in
A further opening of the door past the intermediate position results in needle roller 55 leaving its first notch and rotating about cam 54 until it reaches another notch corresponding to a fully-open door position. Stop 34 as well then can interact with planar base 39 to prevent the door from opening past the fully-open position (or a position slightly past the fully-open position, but in any case so that the door is prevented from contacting the vehicle body). Thus a full 180 degree open position can be achieved.
When closing the door from the fully-open position, the braking resistance of the door pivot 122 is less than that of the pillar pivot 121, so that needle 55 first exits the second notch of cam 54 and begins to roll about cam 54, while needle 154 remains in the second notch of cam 160. Once needle 54 reached the first notch of cam 54, and thus the intermediate position, door connector 22 is prevented from further rotation with respect to link 23 by virtue of stop 32 acting against planar base 39. Further closing of the door then results in needle 155 exiting the second notch in cam 160 and returning to the first notch and thus the closed door position.
The door 82 is opened from the full closed position shown in
If the door 82 is further displaced from the position show in
Stop 34 also interacts with planar base 39, so that further rotation is prevented by this positive stop as well, thus further protecting against more than a 180 degree rotation.
If the door is then closed again to its intermediate position, the double pivot notch-brake hinge 10 pivots about the door pivot 122. This is achieved because the braking resistance of the door pivot 122 is less that the braking resistance of the body pivot 121 during closing. Needle 55 thus moves out of notch 266 and returns to notch 255, while roller 155 remains in notch 356. At this point, further rotation of door 82 in a clockwise direction opposite to direction D is prevented by stop 32 interacting with planar base 39, as shown in
Any further torque applied to the door 82 to close the door 82 thus activates the body pivot 121 because the door side pivot 122 cannot further rotate due to positive stop 32. Needle roller 155 thus exits notch 355 and the door pivots about the body pivot 121 closing the door from the intermediate position to 0°.
The terms “pillar” and “body” as used herein are fully interchangeable. “Fully open” as defined herein is solely a desired position of the door past the intermediate position, and need not correspond to a 180 degree door position.
This application is a continuation of U.S. patent application Ser. No. 10/663,017, filed Sep. 15, 2003, which is now U.S. Pat. No. 6,817,063. U.S. patent application Ser. No. 10/663,017 was filed as a continuation to U.S. patent application Ser. No. 09/996,543, filed on Nov. 28, 2001, which is now U.S. Pat. No. 6,629,337.
| Number | Name | Date | Kind |
|---|---|---|---|
| 4700984 | Kinaga et al. | Oct 1987 | A |
| 6305737 | Corder et al. | Oct 2001 | B1 |
| 6606763 | Bruckner | Aug 2003 | B1 |
| Number | Date | Country |
|---|---|---|
| 55-101263 | Jul 1980 | JP |
| 57-46014 | Mar 1982 | JP |
| Number | Date | Country | |
|---|---|---|---|
| 20050184556 A1 | Aug 2005 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 10663017 | Sep 2003 | US |
| Child | 10933683 | US | |
| Parent | 09996543 | Nov 2001 | US |
| Child | 10663017 | US |
