JPS6013871B2 - Automotive hood hinge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automobile hood hinge that assists the hood in an upright direction when opening the hood that covers the upper part of the engine compartment of the automobile, thereby reducing the operator's hood opening operation force. The purpose is to downsize the hood hinge, improve operability, and improve the holding power of the hood in the upright position.

A conventionally known device of this kind has a hood' as shown in FIG.
A first bracket 1 is fastened together, a second bracket 2 is fastened to the automobile body, a first link 3 has one end pivotally connected to the first bracket 1 and the other end to the second bracket 2, and one end is connected to the first bracket 2. 1, a third link 5 which has one end pivotally connected to the second link 4 and the other end to the second bracket 2, one end to the first link 3 and the other end to the third link 5, respectively. It consists of a pivoted fourth link 6 and a spring 7 that biases the first bracket 1 in the upright direction.

Since this hood hinge requires as many as four links in addition to both brackets, it is inevitably large, and has disadvantages such as poor operability due to resistance due to the large number of pivot points (seven points). Therefore, the present invention aims to solve the above-mentioned drawbacks.Other than the first bracket fixed to the hood and the second bracket and biasing means mounted on the body, the first link connecting both brackets and the first link are different from each other. The hood can be supported in the upright direction using only the two IJ links of the second link that connect both brackets without intersecting the links at different positions, thereby reducing the size, improving operability, and manufacturing. This greatly contributed to cost reduction.

Furthermore, the biasing means has one end placed on the first bracket near the pin contact position between the first bracket and the first link, and an end thereof placed on the second link near the pin contact position between the second bracket and the second link. By mounting the hood at a position closer to the first placket than the pivot sleeve, the hood can be held in a fully open position with good holding power. The details of the present invention will be explained below with reference to embodiments shown in FIG. 2 (front view) and FIG. 3 (left side view). In the figure, 11 is the first bracket fixed to the hood (not shown), and the wing 2 is the car body (
The second bracket (not shown) is attached to one end of the first bracket (not shown) and the other end is attached to one end of the second bracket (2) through pins 149 and 15 so that the bracket can be freely rotated. A first link 16, which is pivotally mounted, has one end connected to the first bracket 1 and the other end to one end of the second bracket 2 at a position opposite to the pins 4 and 6, respectively. Pin 1 without intersecting link 13?
This is a second link rotatably connected via a vine 8.

The protruding portion formed at the end of the first bracket connecting portion of the first bracket connecting portion to the first link connecting portion 3, and the connecting portion of the second link 16 to the second bracket 12 toward the first bracket. A protruding portion 161 provided close to L at the approaching position and close to the pin fitting portion.
This is a spring that has both ends locked with the pins 14 and 18, respectively, and has the function of biasing the pins 14 and 18 toward each other to raise the first bracket turtle 1 as shown by the solid line in FIG. Note that one end of the spring pin 9 may be locked to the pivoting end of the first link to the first placket. 28' second
The bracket turtle 2 is formed near the pin 18 by machining or the like so as to protrude toward the operating surface of the second link wheel 6.
This is a stopper that restricts the bracket 11 from standing up.

Next, the operation of the hood column of the present invention will be explained.

The solid line in FIG. 2 shows the fully open state of the hood, and the two-dot chain line in FIG. 2 shows the fully closed state of the hood.

When the hood is opened from the fully closed state, each member rotates around each pivot position as a fulcrum from the state indicated by the two-dot chain line in FIG. stand up and bring the hood to the fully open position, as shown by the solid line in Figure 2. The tendency of the change in the hood opening force spring moment and the hood self-weight moment J from the fully closed state to the fully open state of the hood is shown in Fig.

In the figure, the solid line a is the force for opening the hood of the device of the present invention, and when the opening operation is performed in the fully closed state, the spring moment and the hood's own weight moment come into balance, and from then on, the spring moment > the hood's own weight moment. The hood can be opened without any additional operation. In this case, the spring moment decreases as the spring contracts, but the rate of decrease in the moment of the hood's own weight as the hood rises is greater than the rate of decrease in the spring moment, so the force for opening the hood increases.
As the hood approaches the fully open position, the rate of decrease in the hood's own weight moment becomes relatively small, and the opening force shows a tendency to decrease. hold in the fully open position. On the other hand, the dotted line b in FIG. 4 indicates that one end of the spring 89 is locked to a fixed part such as the second bracket 12 near the pin hook 8, and the operating force at the start of the hood opening operation is applied to the same hook as in the device of the present invention. This figure shows the tendency of the hood opening force when the spring force of the spring is set so that

When the hood approaches the fully open position, the reduction in the force for opening the hood is remarkable compared to the layer of the present invention. This difference is due to the fact that in the device of the present invention, one end of the spring hook 9 is connected to the pin hook as shown in FIG. This is due to the fact that the second link pin 6 is provided with a backstop closer to the first bracket turtle 1 side than the second link pin 6.

As a result, when the hood is opened, the locking position of the spring 9 moves in the direction of arrow A as the second link turtle 6 rotates, and the locking portion 11 at the end of the spring 9 shifts in the direction away from the turtle. , the difference in spring length between when the hood is fully opened and when the hood is fully open is smaller than when one end of the spring 19 is locked to a fixed part such as the second placket member 2. Therefore, when the hood is fully opened, the spring moment of the spring is smaller than when the hood is fully opened. is maintained relatively large, and the force to hold the fully open position increases.The spring force of the spring used for the hood hinge is naturally limited because if it is increased, the opening action of the hood becomes too strong.However, on the other hand, In this case, it is required that the hood does not wobble in the fully open position and that the position is reliably held.

The device of the present invention allows the limited biasing force of the spring to be effectively exerted when the hood is fully opened. As described above, the hood hinge of the present invention consists of only two links whose ends are pivotally connected to both brackets, in addition to the bracket fastened to the hood, the bracket fixed to the body, and the biasing means. There is little resistance at the attachment part, which provides good operability and allows for miniaturization.

In addition, the hood retaining force in the fully open position is good, and has excellent effects such as alleviating operator anxiety when repairing or inspecting the engine compartment.

[Brief explanation of the drawing]

Fig. 1 is a front view of a subordinate hood hinge - Fig. 2 is a front view of an embodiment of the hood hinge of the present invention, Fig. 3 is a left side view thereof, and Fig. 4 is a hood opening operation of the hood hinge of the present invention. FIG. 11...First bracket, 12...Second bracket, 1
3...first link, 16...second link, 19...spring. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. A first bracket fixed to the hood, a second bracket fixed to the automobile body, a first link having both ends rotatably pivoted to one end of the first bracket and one end of the second bracket, respectively, and both ends. a second link rotatably pivoted to the first bracket and the second bracket at a position different from the pivot position of the first link without intersecting the first link; One end is pivotably mounted on the first bracket near the pivoting position between the bracket and the first link, and the other end is pivotably mounted on the second link near the pivoting position between the second bracket and the second link. 1. A hood hinge for an automobile comprising a biasing means mounted at a position closer to a first bracket to bias both pivot parts in a direction closer to each other and to act on the first bracket in an upright direction.