CN208558925U

CN208558925U - A kind of variable stiffness coil spring

Info

Publication number: CN208558925U
Application number: CN201820990620.8U
Authority: CN
Inventors: 杨凱; 王兴平; 张谣; 徐迎秋; 郑燕冬
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2018-06-26
Filing date: 2018-06-26
Publication date: 2019-03-01
Anticipated expiration: 2028-06-26

Abstract

The utility model provides a kind of variable stiffness coil spring, the helical spring coil is divided into four sections, from helical spring lower end be 1 circle bracing ring, then be helical spring first segment coil, first segment coil by 6 circle central diameters be A1, the main building ring that pitch is B1 is constituted；Helical spring second segment coil is 1 circle transition ring, and the central diameter of second segment coil uniformly becomes A2 from A1, and pitch is that B1 is constant；Helical spring third section coil 1 encloses totally, and the central diameter of third section coil is A2, pitch is B1 constant；The 4th section of coil of helical spring totally 0.5 circle, the central diameter of the 4th section of coil is A2, pitch B2, wherein A1 is greater than A2, and B1 is greater than B2；The rigidity of the utility model helical spring under normal load is constant; and it is pressed in first segment coil and to jumping on wheel in limit travel; rigidity is gradually increased, until rigidity of helical spring is greater than work rigidity an order of magnitude, plays the role of jump amount on limiting wheel, protection helical spring.

Description

A kind of variable stiffness coil spring

Technical field

The utility model design belongs to automobile suspension system field, and in particular to a kind of variable stiffness coil spring.

Background technique

The major function of helical spring is that the active force by ground in face of wheel passes to vehicle frame, subframe；Pass through spiral shell simultaneously It revolves spring-compressed and upholds, mitigate vibration caused by uneven road surface and impact.

Chinese patent Authorization Notice No. is that the utility model patent document of CN202140488U discloses a kind of automobile-used suspension Helical spring, the helical spring are divided into two different parts of pitch.In vehicle semi-load, more than Conventional springs rigidity It is low, the offset frequency of suspension is reduced, ride comfort is improved, when excessively curved, the rigidity of stiffness variable spring becomes larger vehicle, improves vehicle and rolls Rigidity.But it may be noted that two o'clock: (1) structure is suitable in the biggish vehicle bridge of fully loaded, unloaded difference, very for load difference Small position, such as the front axle of vehicle, variation rigidity have little significance；(2) by regulation by pitch rigidity, will lead to helical spring compared with Height is unfavorable for compact Layout.

The design conditions of current most of variable stiffness coil springs:

(1) reach stiffness change, this variable stiffness coil spring master essentially by pitch, the central diameter even variation of string diameter To increase with load, rigidity increases simultaneously, improves vehicle ride comfort, is suitable for the biggish position of load change, for empty, fully loaded Change little front suspension, advantage is not obvious.

(2) complex manufacturing technology of helical spring, especially change helical spring string diameter or arrangement space need larger.

Summary of the invention

The utility model provides a kind of new mentality of designing of variable stiffness coil spring, considers front suspension load change very Small, the limited equal input conditions of arrangement space are designed to that the rigidity of the helical spring under normal load is constant, and in body of work circle It presses and is jumped in limit travel on wheel, gradually increase rigidity, until rigidity of helical spring is greater than work rigidity, play limitation vehicle The effect of jump amount, protection helical spring and other structural members on wheel.

The utility model adopts the following technical solution:

A kind of variable stiffness coil spring, which is characterized in that the helical spring coil is divided into four sections, under helical spring Held for 1 circle bracing ring, be then followed successively by from the bottom to top helical spring first segment coil, helical spring second segment coil, The 4th section of coil of helical spring third section coil and helical spring, helical spring first segment coil by 6 circle central diameters be A1, The main building ring that pitch is B1 is constituted；Helical spring second segment coil is 1 circle transition ring, helical spring second segment coil Central diameter uniformly becomes A2 from A1, and pitch is that B1 is constant；Totally 1 circle, helical spring third section are effective for helical spring third section coil The central diameter of circle is A2, pitch is B1 constant；The 4th section of coil of helical spring 0.5 encloses totally, the 4th section of coil of helical spring Central diameter is A2, pitch B2, wherein A1 is greater than A2, and B1 is greater than B2.

A kind of variable stiffness coil spring described in the utility model realizes that the principle of function is as follows:

(1) helical spring effect partial is divided into four sections, building ring based on first segment, different from third section central diameter, in Between connected by second segment transition, the 4th section of pitch becomes smaller, and presses in first segment building ring and to choosing in limit travel on wheel, gradually Increase rigidity, meet the rigidity requirement under suspension system service load, while playing and being jumped in limitation, protection building ring helical spring Effect；

(2) helical spring bottom bracing ring is 1 circle, does not press and does not also polish, and is embedded in helical spring pedestal, offsets spiral bullet It is bent the cross force of generation after spring assembly, and prevents helical spring from rotating due to movement；

(3) helical spring top braces circle polishes, and pads parallel contact with helical spring sleeve, avoids gnawing liner.

A kind of variable stiffness coil spring described in the utility model, is designed to the rigidity of the helical spring under normal load not Become, and in first segment coil pressure and in jump limit travel, rigidity is gradually increased on wheel, until rigidity of helical spring is greater than Work rigidity an order of magnitude, plays the role of jump amount on limiting wheel, protection helical spring.

Detailed description of the invention

Fig. 1 show a kind of structural schematic diagram of variable stiffness coil spring described in the utility model；

Fig. 2 show a kind of variable stiffness coil spring stiffness curve schematic diagram described in the utility model.

Specific embodiment

Below in conjunction with attached drawing, the utility model is further described in detail:

As shown in Figure 1, a kind of variable stiffness coil spring, which is divided into four sections, under helical spring Held for 1 circle bracing ring, be then followed successively by from the bottom to top helical spring first segment coil, helical spring second segment coil, The 4th section of coil of helical spring third section coil and helical spring, helical spring first segment coil by 6 circle central diameters be A1, The main building ring that pitch is B1 is constituted；Helical spring second segment coil is 1 circle transition ring, helical spring second segment coil Central diameter uniformly becomes A2 from A1, and pitch is that B1 is constant；Totally 1 circle, helical spring third section are effective for helical spring third section coil The central diameter of circle is A2, pitch is B1 constant；The 4th section of coil of helical spring 0.5 encloses totally, the 4th section of coil of helical spring Central diameter is A2, pitch B2, wherein A1 is greater than A2, and B1 is greater than B2.

Final helical spring is starting stress, to wheel on stiffness variation when jumping the limit reach shown in Fig. 2, normal load Lower rigidity is constant, in first segment coil pressure and in jump limit travel, rigidity is gradually increased on wheel, until helical spring is rigid Degree is greater than work rigidity an order of magnitude, plays the role of jump amount on limiting wheel, protection helical spring.

Claims

1. a kind of variable stiffness coil spring, which is characterized in that the helical spring shares four sections of coils, from helical spring lower end For 1 circle bracing ring, it is then followed successively by helical spring first segment coil, helical spring second segment coil, spiral from the bottom to top The 4th section of coil of spring third section coil and helical spring, helical spring first segment coil are A1, pitch by 6 circle central diameters It is constituted for the main building ring of B1；Helical spring second segment coil is 1 circle transition ring, the central diameter of helical spring second segment coil A2 is uniformly become from A1, pitch is that B1 is constant；Helical spring third section coil 1 encloses totally, helical spring third section coil Central diameter is A2, pitch is B1 constant；The 4th section of coil of helical spring 0.5 encloses totally, the central diameter of the 4th section of coil of helical spring For A2, pitch B2, wherein A1 is greater than A2, and B1 is greater than B2.