CN203008603U - Four-connecting rod hinge - Google Patents

Abstract

The utility model relates to a four-link hinge, which solves the problems of high cost, uniform and continuous force variation and unfavorable limit at the maximum opening position in the existing four-link hinge. The technical solution includes a fixed frame hinged in turn, a first rocker arm and a swing arm, and also includes a second rocker arm, the swing arm is provided with a guide groove, and a limit shaft is arranged on the guide groove wall; the second rocker arm is A torsion bar spring, the spring end of the torsion bar spring is connected to the fixed frame, and the torsion bar end is placed in the guide groove below the limit shaft of the boom. The utility model has the advantages of simple structure, high reliability and low cost, and can limit the maximum opening position.

Description

Four-bar hinge

technical field

The utility model relates to a vehicle component, in particular to a four-link hinge used for a salute box cover or an engine cover.

Background technique

In the tailgate or hood of some cars, a four-bar hinge assisted by pneumatic springs is used. Referring to Figure 1, the commonly used structure is: the two ends of the first rocker arm and the second rocker arm are respectively hinged with the fixed frame and the boom, and a pneumatic spring (also called a pneumatic rod) is connected between the movable wall and the fixed frame. The cost of the pneumatic spring with this structure is relatively high, and its force change is uniform and continuous, which is not conducive to limit the position at the maximum opening position.

Contents of the invention

The purpose of the utility model is to solve the above-mentioned technical problems, and provide a four-link hinge with simple structure, high reliability, low cost, and can limit the maximum opening position.

The technical solution includes a fixed frame hinged in turn, a first rocker arm and a swing arm, and also includes a second rocker arm, the swing arm is provided with a guide groove, and a limit shaft is arranged on the guide groove wall; the second rocker arm is A torsion bar spring, the spring end of the torsion bar spring is connected to the fixed frame, and the torsion bar end is placed in the guide groove below the limit shaft of the boom.

The end of the torsion bar of the torsion bar spring is provided with a limit hook.

The torsion bar spring close to the end of the torsion bar is further provided with at least one limiting slot matched with the limiting shaft.

The two side walls of the limiting groove are smooth slopes, and the slope near the end of the torsion bar is higher than the slope near the end of the spring.

Beneficial effect:

1. Adopting the torsion bar spring to replace the existing pneumatic spring can effectively reduce the production cost.

2. The change of the force of the spring is in the form of a curve, which is more suitable for the cover of the car cover or the cover of the salute box. Through the cooperation of the limit shaft and the limit groove on the torsion bar spring, the forward thrust can be reduced when the movable wall is opened to the maximum limit position, and a large reverse limit force can be generated; through the limit shaft and The cooperation of the limit hook can limit the opening position at the maximum and close to the maximum position, and the reliability is good.

3. The utility model has the advantages of simple structure, convenient use and maintenance, and broad market prospect.

Description of drawings

Fig. 1 is a structural schematic diagram of an existing four-bar linkage hinge.

Fig. 2 is a structural schematic diagram of the four-link hinge of the utility model in an open state.

Fig. 3 is a partial sectional view of the limiting groove.

Fig. 4 is a structural schematic diagram of the closed state of the four-link hinge of the utility model.

Among them, 1-fixed frame, 2-boom, 21-limit shaft, 22-guide, 3-first rocker arm, 4-second rocker arm, 41-limit slot, 411-slope, 412- Slope, 42-limit hook, 5-pneumatic rod.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further explained:

Referring to Fig. 2, the fixed frame 1, the first rocker arm 3 and the boom 2 are hinged sequentially, the boom 2 is provided with a guide groove 22, and the guide groove wall is provided with a limit shaft 21; the second rocker arm 4 is A torsion bar spring, the spring end of the second rocker arm 4 is connected to the fixed frame 1, and the torsion bar end is placed in the guide groove 22 below the limit shaft 21 of the boom 2. The end of the torsion bar of the second rocker arm 4 is provided with a limit hook 42 . The second rocker arm 4 close to the end of the torsion bar is further provided with at least one limiting groove 41 matched with the limiting shaft 21 . Referring to Fig. 3, the two side walls of the limiting groove 41 are smooth slopes 411, 412, and the slope a of the slope 411 close to the torsion bar end is higher than the slope b of the slope 412 close to the spring end, so that when the second rocker arm 4. When moving along the guide groove 22, and when the limiting shaft 21 smoothly inserts into the limiting groove 41 through the slope 412 under the positive thrust, the limiting groove 41 will continue to move downward under the forward thrust. 411 has a relatively high slope, and the limiting shaft 41 will generate a relatively large reverse limiting force for the limiting groove, thereby achieving the purpose of limiting.

working principle:

Referring to Figure 2, when it is necessary to press down (such as closing the trunk lid), a downward force is applied to the boom 2, and the boom 2 overcomes the spring force of the second rocker arm 4 so that the torsion bar end of the second rocker arm 4 is in the The swing arm 2 slides in the guide groove 22, and at the same time drives the first rocker arm 3 to move until the swing arm 2 is pressed down to the required position (that is, the trunk lid is completely closed). At this time, other locking mechanisms attached to the trunk lid can be used. can be canceled;

Referring to Fig. 4, when it needs to be opened (i.e. to open the trunk lid), first release the locking mechanism of the trunk lid, and then under the action of the spring force of the torsion bar spring, the torsion bar end of the second rocker arm 4 is guided along the edge. The groove 22 slides in the opposite direction on the limit shaft 21, pushes the starting arm 2 upwards, and correspondingly drives the first rocker arm 3 to expand. When the moving arm 2 is lifted up to the limit position, the limit groove 41 moves to the limit shaft At 21, because the slope 411 of the limit groove 41 near the torsion bar end has a higher slope than the slope 412 near the spring end. Therefore, the limit groove 41 can be fitted with the limit shaft 21 relatively easily, but the second rocking arm 4 needs to overcome a larger reverse limit force to make the limit groove 41 pass through the limit shaft 21 (even if the limit shaft 21 Moved out by the limit groove 41), the limit groove 41 can be designed according to the required limit force one or more, when the boom 2 is lifted to the maximum limit position, the limit hook 42 can be hung into the limit shaft 21 , to prevent the second rocker arm 4 from coming out of the guide groove 22 of the boom 2 . In this way, the closing and opening actions of the trunk lid in this embodiment can be realized.

Claims (4)

1. a connecting rod link, comprise hinged successively fixed frame, the first rocking arm and swing arm, it is characterized in that, also comprises the second rocking arm, and described swing arm is provided with guide groove, and the guide groove wall is provided with limit shaft; Described the second rocking arm is torsion-bar spring, and the spring terminal of described torsion-bar spring is connected with fixed frame, and the torsion bar end is placed in the guide groove of swing arm limit shaft below.

2. four connecting rod links as claimed in claim 1, is characterized in that, the torsion bar end end of described torsion-bar spring is provided with positive stop hook.

3. four connecting rod links as claimed in claim 1 or 2, is characterized in that, also is provided with the stopper slot that at least one coordinates with limit shaft on the described close torsion-bar spring of torsion bar end.

4. four connecting rod links as claimed in claim 3, is characterized in that, described stopper slot two side is smooth slope, and the gradient on described slope near the torsion bar end is higher than the gradient near the slope of spring terminal.

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