CN203008603U

CN203008603U - Four-connecting rod hinge

Info

Publication number: CN203008603U
Application number: CN 201220704158
Authority: CN
Inventors: 宫仲坤; 赵凤云; 王强
Original assignee: Dongfeng Motor Corp
Current assignee: Dongfeng Motor Corp
Priority date: 2012-12-19
Filing date: 2012-12-19
Publication date: 2013-06-19
Anticipated expiration: 2022-12-19

Abstract

The utility model relates to a four-connecting rod hinge which solves the problems that costs are high, force changes are uniform and continuous and position limiting at maximum opening positions is obstructed due to the fact that pneumatic springs are used in existing four-connecting rod hinges for limiting. The technical scheme includes that the four-connecting rod hinge comprises a fixing rack, a first rocker arm, a moving arm and a second rocker arm, wherein the fixing rack, the first rocker arm and the moving arm are hinged sequentially, a guide groove is arranged on the moving arm, a limiting shaft is arranged on the wall of the guide groove, the second rocker arm is a torsion bar spring, a spring end of the torsion bar spring is connected with the fixing rack, and a torsion bar end is located inside the guide sleeve under the limiting shaft of the moving arm. The four-connecting rod hinge is simple in structure, high in reliability, low in cost and capable of conducting limiting at the maximum opening position.

Description

Four connecting rod links

Technical field

The utility model relates to a kind of automobile-used parts, specifically a kind of four connecting rod links be used to salute case lid or hood.

Background technology

In the trunk lid or hood of some cars, adopt four connecting rod links of pneumatic spring power-assisted.With reference to Fig. 1, common structure is: the two ends of the first rocking arm and the second rocking arm are hinged with fixed frame and swing arm respectively, connect pneumatic spring (claiming again air-leg) between moving wall and fixed frame simultaneously.This structure the cost of pneumatic spring higher, to change be evenly and continuously to its power simultaneously, is unfavorable for carrying out spacing in maximum open position.

Summary of the invention

The purpose of this utility model is in order to solve the problems of the technologies described above, provide a kind of simple in structure, reliability is high, cost is low and can maximum open position carry out four spacing connecting rod links.

Technical scheme comprises hinged successively fixed frame, the first rocking arm and swing arm, 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.

The torsion bar end end of described torsion-bar spring is provided with positive stop hook.

Also be provided with the stopper slot that at least one coordinates with limit shaft on the described close torsion-bar spring of torsion bar end.

Described stopper slot two side is smooth slope, and the gradient on the slope of described close torsion bar end is higher than the gradient on the slope of close spring terminal.

Beneficial effect:

1. adopt torsion-bar spring to replace existing pneumatic spring, can effectively reduce production costs.

2. the variation of the power of spring is curved formula, more is applicable to deck lid or salutes case lid class case lid.By the cooperation of the stopper slot on limit shaft and torsion-bar spring, in the time of can making wall be opened near maximum spacing position, forward thrust reduces, and produces larger reverse spacing power; By the cooperation of limit shaft and positive stop hook, can maximum and carry out near the maximum position enable possition spacing, good reliability.

3. the utility model is simple in structure, working service is easy, has wide market prospects.

Description of drawings

Fig. 1 is the structural representation of existing four connecting rod links.

Fig. 2 is the structural representation of the utility model four connecting rod link openings.

Fig. 3 is the partial sectional view of stopper slot.

Fig. 4 is the structural representation of the utility model four connecting rod link closed conditions.

Wherein, 1-fixed frame, 2-swing arm, 21-limit shaft, 22-guide groove, 3-the first rocking arm, 4-the second rocking arm, 41-stopper slot, 411-slope, 412-slope, 42-positive stop hook, 5-air-leg.

The specific embodiment

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

With reference to Fig. 2, fixed frame 1, the first rocking arm 3 and swing arm 2 are hinged successively, and described swing arm 2 is provided with guide groove 22, and the guide groove wall is provided with limit shaft 21; Described the second Rocker arm 4 is torsion-bar spring, and the spring terminal of described the second Rocker arm 4 is connected with fixed frame 1, and the torsion bar end is placed in the guide groove 22 of swing arm 2 limit shaft 21 belows.The torsion bar end end of described the second Rocker arm 4 is provided with positive stop hook 42.Also be provided with the stopper slot 41 that at least one coordinates with limit shaft 21 on described close the second Rocker arm 4 of torsion bar end.With reference to Fig. 3, described stopper slot 41 two sides are smooth slope 411,412, the gradient a on the slope 411 of described close torsion bar end is higher than the gradient b on the slope 412 of close spring terminal, like this, when the second Rocker arm 4 interior when mobile along guide groove 22, and when limit shaft 21 under forward thrust by the level and smooth embedding stopper slot 41 in slope 412 after, under forward thrust, stopper slot 41 can continue to move down, because slope 411 gradients are higher, limit shaft 41 can produce larger reverse spacing power to stopper slot, thereby reaches spacing purpose.

Operating principle:

With reference to Fig. 2, in the time of need to pressing down (as closing luggage-boot lid), apply downward power to swing arm 2, the spring force that swing arm 2 overcomes the second Rocker arm 4 makes the torsion bar end of the second Rocker arm 4 in the interior slip of guide groove 22 of swing arm 2, drive simultaneously that the first rocking arm 3 moves until swing arm 2 press to require position (being that luggage-boot lid is closed fully) till, can only get final product this moment by other lockable mechanism pin that luggage-boot lid attaches;

With reference to Fig. 4, when needs are opened (opening luggage-boot lid), at first remove the lockable mechanism of luggage-boot lid, then under the effect of the spring force of torsion-bar spring, the torsion bar end one edge guide groove 22 of the second Rocker arm 4 is in limit shaft 21 reverse slide, jack-up swing arm 2 on one side makes progress, and corresponding drive the first rocking arm 3 launches, when lifting on swing arm 2 near spacing position the time, stopper slot 41 moves to limit shaft 21 places, due to stopper slot 41 near the gradient on the slope 411 of torsion bar ends higher than the gradient near the slope 412 of spring terminal.Therefore, stopper slot 41 can comparatively be easy to limit shaft 21 chimeric, even but the second Rocker arm 4 need overcome larger reverse spacing power, stopper slot 41 is shifted out by stopper slot 41 by limit shaft 21(limit shaft 21), described stopper slot 41 can spacing power as required design one or more, when swing arm 2 is lifted to the spacing position of maximum, positive stop hook 42 can be hung into limit shaft 21, avoids deviating from the guide groove 22 of the second Rocker arm 4 by swing arm 2.So just can realize closing and breakdown action of luggage-boot lid in the present embodiment.

Claims

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.