JPH0645575Y2 - Automotive door hinges - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a door hinge for attaching a door of an automobile to its vehicle body.

[Conventional technology]

As shown in FIG. 5, a vehicle door hinge 10 is a door 12
Is located between the vehicle body side pillar 14 and the vehicle body side pillar, and as shown in detail in FIG.
Attach the other hinge female 18 to the pillar 12
It is configured to be attached to 14.

By the way, the door hinge 10 shown in FIG. 6 is a conventional door hinge of this kind, and according to this, the door hinge 10 has both end mounting portions 16 in the hinge mail 16.
Both side wall portions 16b, 16b of a portion protruding in a U shape from a, 16a,
The through hole 1 is formed in each of the wing portions 18b, 18b protruding substantially vertically from the central mounting portion 18a of the hinge female 18.
6c, 16c and 18c, 18c are perforated, and the hinge pin 22 is inserted through these through holes via bushes 20, 20, respectively.

[Problems to be solved by the device]

However, the above-mentioned conventional door hinge has the following drawbacks.

That is, first of all, the door hinge is composed of a hinge mail and a hinge female, both bushes and a hinge pin, which increases the number of parts for this type of automobile part, increases the cost and complicates the assembly work. Met. Next, the hinge mail and the hinge female are supported by both through hole portions, that is, both bushes. Therefore, there is a drawback that a relatively large load is applied to both bushes and the bushes are damaged. The damage can be considerably prevented by precision processing (generally press punching) of the through hole with a reamer or the like, but in this case, the processing cost is further increased, and in this case, However, the durability of the bush was not always sufficiently achieved.

Therefore, an object of the present invention is to provide a door hinge for an automobile which has a simple structure, can be manufactured easily and inexpensively, and has excellent durability and reliability.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, an automobile door hinge according to the present invention comprises a hinge mail to be attached to a door and a hinge female to be attached to a pillar on a vehicle body, and the hinge mail has a U-shape from its both end mounting portions to its central bushing. It has a protruding hinged core rod having a circular cross section, and the hinge female has a hinged tubular processing portion protruding in an L shape from the mounting portion on one side thereof, and the tubular processing portion is subjected to sheet metal press working. Is hinge-coupled so as to cover the core rod portion.

In this case, the hinge male can be integrally formed by cold or warm forging, while the hinge female can be integrally formed by sheet metal bending from one plank including the folded portion for reinforcing the mounting portion. Further, it is preferable that the contact surface between the core rod portion and the tubular processing portion is chemically processed.

[Action]

The door hinges are hinge mail and hinge female.
It is composed of only parts, and these two parts are integrally formed with each other, and the core rod part and the tubular processed part are hinge-coupled to each other.

Therefore, the door hinge has a reduced number of parts and is relatively easy to assemble, so that the cost is reduced. At the same time, the hinge contact surface is lengthened to improve durability and reliability.

〔Example〕

An embodiment of a vehicle door hinge according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view of a door hinge of the present invention (before assembly), and FIG. 2 is a sectional view showing a state in which the door hinge is assembled and assembled in a vehicle. As can be seen from the drawings, the door hinge 30 of the present invention comprises a hinge mail 32 attached to the door 12 and a hinge mail 34 attached to the vehicle body side pillar 14.

The hinge mail 32 has a hinge coupling core rod 32b having a circular cross section and protruding in a U shape between the flat plate-shaped both end mounting portions 32a, 32a. The shapes of the connecting portions 32c, 32c between the mounting portion and the core rod portion gradually change from a circular cross section at one end to a flat plate shape at the other end. The hinge mail 32 is integrally formed by cold or warm forging. On the other hand, the hinge female 34 has a tubular processing portion 34c that projects in an L-shape from the mounting portion 34a via the support portion 34b, and reinforcing folding portions 34d, 34d are provided on both side edges of the mounting portion 34b. Prepare The hinge mail 34 is integrally formed by sheet metal bending. That is, in FIG. 3, the folded portions 34d, 34d from the plank 40 are
The tubular processing portion 34c is bent after the support portion 34b is bent. And both these parts 32 and 34 are the first
As shown in FIG. (B), the core rod portion 32b of the hinge mail 32 is inserted into the tubular processed portion 34c of the hinge female 34, and the tubular processed portion 34c is covered on the core rod portion 32b. Hinged by sheet metal pressing. The contact surface between the tubular processed portion 34c and the core rod portion 32b is preferably chemically processed before the hinge connection.

Thus, the vehicle door hinge of the present invention is composed of only two parts, the hinge mail and the hinge female,
Moreover, these two parts are integrally molded and then hinged by sheet metal press working to complete the assembly. Therefore, compared to the conventional door hinge of this type, the number of parts is reduced and the assembly is relatively easy.
Cost is reduced. Furthermore, since the hinge contact surface is lengthened, durability and reliability are improved.

FIG. 4 shows another embodiment of the hinge female 34 according to the present invention. In this embodiment, the folded portion is further extended along both side edges of the mounting portion in the previous embodiment. That is, the folded-back portions 34d and 34e are the mounting portion 34a and the support portion 34b.
It is formed along. By doing so, the strength of the supporting portion 34b is particularly improved, so that the plate thickness of the entire hinge female can be reduced. In this case, for the hinge female, a blank made of aluminum or its alloy is subjected to a bending process.

The present invention has been described above with reference to the preferred embodiments, but the present invention is not limited to the above embodiments, and many design changes can be made without departing from the spirit thereof.

[Effect of device]

As described above, the door hinge for an automobile according to the present invention is formed by integrally forming a hinge bar with a circular cross-section on a hinge mail and forming it integrally with a sheet metal by bending a hinge female into a tubular processing part. Since the core rod portion and the tubular processed portion are hinge-coupled by sheet metal press working, the number of parts is reduced and the assembly is relatively easy as compared with the conventional door hinge of this type, and the cost is reduced. Can be reduced. Further, the hinge contact surface is lengthened, and durability and reliability can be improved.

[Brief description of drawings]

1 (a) and 1 (b) are exploded perspective views of an embodiment of an automobile door hinge according to the present invention before assembly, and FIG. 2 is an assembled automobile door hinge shown in FIG. Sectional view showing the attached state, FIG. 3 (a), (b),
(C) is a plan view illustrating a manufacturing process of the hinge female constituting the door hinge shown in FIG. 1, and FIG. 4 is a perspective view showing another embodiment of the hinge female constituting the door hinge for an automobile according to the present invention. 5 and 5 are perspective views for explaining the assembling of an automobile door hinge to an automobile, and FIG. 6 is a sectional view showing a conventional automobile door hinge. 12 …… door, 14 …… pillar 30 …… door hinge, 32 …… hinge mail 32a …… mounting part, 32b …… core rod part 32c …… connecting part 34 …… hinge female 34a …… mounting part, 34b… … Supporting part 34c …… Tubular processing part 34d, 34e …… Folding part 70 …… Planck

Claims (4)

[Scope of utility model registration request] Claims: 1. A hinge mail attached to a door and a hinge female attached to a pillar on the vehicle body side. The hinge mail has a hinge coupling core rod portion having a circular cross-section projecting in a U shape from both end attachment portions at its central portion. The hinge female has a hinge coupling tubular processing portion projecting in an L shape from the attachment portion on one side thereof, and the hinge coupling is performed so that the tubular processing portion is covered with the sheet metal stamping on the core rod portion. Door hinges for automobiles. 2. The door hinge for an automobile according to claim 1, wherein the hinge mail is integrally formed by cold or warm forging. 3. The door hinge for an automobile according to claim 1, wherein the hinge female has a reinforcing folded-back portion along both side edges of the mounting portion and is integrally formed from plank by sheet metal bending. 4. The door hinge for an automobile according to claim 1, wherein a contact surface between the core rod portion and the tubular processed portion is chemically processed.