阅读说明：本技术 一种前钢板弹簧悬架系统 (Front plate spring suspension system ) 是由 杜笑晨 李应涛 彭显威 闫明星 范培斌 于 2019-08-28 设计创作，主要内容包括：一种前钢板弹簧悬架系统,属于重型卡车零部件领域,包括车架(1)和板簧(3),所述板簧(3)在车辆前进方向上的前端为前卷耳(32),所述的前卷耳(32)固定在车架(1)上,所述板簧(3)在车辆前进方向上的前端为后卷耳(31),所述的后卷耳(31)固定在车架(1)后端上,所述板簧(3)中部通过U型螺栓(9)固定在前桥(10)上,所述前桥(10)和吊耳端支架(17)之间设有减振器(14),所述的板簧(3)为单片簧,所述车架(1)上还固定有保护机构(18),所述的保护机构(18)位于吊耳端支架(17)后面。单片簧重量轻,动刚度小,偏频降低,提高汽车平顺性,保护机构作用是对吊耳向后运动进行限位。(The utility model provides a preceding leaf spring suspension system, belongs to heavy truck spare part field, including frame (1) and leaf spring (3), leaf spring (3) front end on the vehicle advancing direction is preceding eye (32), preceding eye (32) fix on frame (1), leaf spring (3) front end on the vehicle advancing direction is back eye (31), back eye (31) fix on frame (1) rear end, leaf spring (3) middle part is fixed on front axle (10) through U type bolt (9), be equipped with between front axle (10) and lug end support (17) shock absorber (14), leaf spring (3) be single leaf spring, still be fixed with protection mechanism (18) on frame (1), protection mechanism (18) be located lug end support (17) at the back. The single leaf spring is light in weight, small in dynamic stiffness, low in offset frequency and capable of improving smoothness of an automobile, and the protective mechanism is used for limiting backward movement of the lifting lug.)

1. A front steel plate spring suspension system comprises a vehicle frame (1) and a plate spring (3), wherein the front end of the plate spring (3) in the advancing direction of a vehicle is a front rolling lug (32), the front rolling lug (32) is fixed on the vehicle frame (1) through a bushing, a front steel plate spring pin and a fixed end support (2), the rear end of the plate spring (3) in the advancing direction of the vehicle is a rear rolling lug (31), the rear rolling lug (31) is fixed on the vehicle frame (1) through a lifting lug (16), a bushing, a rear steel plate spring pin (161) and a lifting lug end support (17), the middle of the plate spring (3) is fixed on a front axle (10) through a U-shaped bolt (9), a lifting lug (14) is arranged between the front axle (10) and the lifting lug end support (17), one end of the vibration absorber (14) is connected with the front axle (10) through a lower vibration absorber support (12), and the other end of the vibration absorber is fixed on the vehicle frame (1) through an, the method is characterized in that: the plate spring (3) is a single-leaf spring, a protection mechanism (18) is arranged behind the lifting lug end support (17), one end of the protection mechanism (18) is fixed on the frame (1), and the other end of the protection mechanism extends out towards the lower part of the frame (1) and extends to the rear part right behind the rear rolling lug (32).

2. A front leaf spring suspension system according to claim 1, wherein: the part of the protection mechanism (18) fixed on the frame (1) is a connecting frame (182), the part of the protection mechanism (18) extending towards the lower part of the frame (1) is a stop plate (181), one surface of the stop plate (181) facing the rear rolling lug (31) is a stop surface (186), and the stop surface (186) faces the rear rolling lug (31).

3. A front leaf spring suspension system according to claim 2, wherein: the connecting frame (182) is of an L-shaped structure and comprises a vertical plate (183) and a horizontal plate (184), and bolt holes (185) are formed in the vertical plate (183) and the horizontal plate (184).

4. A front leaf spring suspension system according to claim 2, wherein: the middle of the stop plate (181) is of a hollow structure.

5. A front leaf spring suspension system according to claim 2, wherein: the distance from the stop surface (186) to the back rolling lug (31) is a1, and when the lifting lug (16) swings backwards maximally, the a1 is 3-5 mm.

6. A front leaf spring suspension system according to claim 2, wherein: an elastic body (187) is arranged on the stop surface (186).

7. A front leaf spring suspension system according to claim 1, wherein: cover plate (8) are cushioned between the upper surface of leaf spring (3) and U type bolt (9), backing plate (11) are cushioned between the lower surface of leaf spring (3) and front axle (10), still be fixed with stopper (13) on frame (1), stopper (13) be located front axle (10) top.

8. A front leaf spring suspension system according to claim 1, wherein: still even there is stabilizer bar (6) on frame (1), stabilizer bar (6) be located between front axle (10) and stiff end support (2), stabilizer bar (6) one end is passed through stabilizer bar support (7) and is connected on front axle (10), and the other end passes through jib (5) and jib support (4) and links on frame (1).

Technical Field

The invention relates to the technical field of heavy truck parts, in particular to a front steel spring plate suspension system.

Background

The suspension system of the automobile refers to a connection structure system among a vehicle body, a vehicle frame and wheels, when the automobile runs on a road, the automobile is subjected to vibration and impact due to the change of the ground, and part of the force of the impact is absorbed by tires, but most of the force is absorbed by the suspension system between the tires and the vehicle body.

At present, the development of heavy trucks is restricted by objective factors such as the implementation of national policy for managing overload and charging by weight, the rising of fuel price, and the strong requirements of enterprises and users on cost saving and operation efficiency improvement. The heavy truck reduces the dead weight of the whole vehicle is an important way to reduce oil consumption, currently, most of front suspension systems of heavy trucks use a steel plate spring as an elastic element, for example, a pair of three leaf springs, the weight of which is generally above 90 kg, so that the weight reduction of the elastic element is one of the methods for solving the dead weight.

Chinese patent grant publication no: CN203666306U, date of authorized announcement: year 2014, 25/06 month, patent name: the utility model discloses a heavy truck suspension structure, this utility model discloses a heavy truck suspension structure, including the leaf spring, the one end and the big support of frame of leaf spring are through round pin hub connection, and the other end passes through leaf spring lug, round pin axle and leaf spring leg joint, the leaf spring support pass through the bolt and be connected with the solebar, the middle part of leaf spring is passed through U type bolt with leaf spring clamp plate and leaf spring bottom bracket fixed connection on the front axle, simple structure, the leaf spring quality that adopts macromolecular material to make is light, the travelling comfort is good. However, the single leaf spring may break at the front half section in the advancing direction when working for a long time, and the corresponding front axle after breaking can move backwards directly, so that the front axle is abnormally steered, and potential safety hazards exist.

Referring to fig. 2, a front leaf spring suspension system of a certain commercial vehicle on the market comprises a leaf spring 3, wherein the leaf spring 3 is of a two-leaf spring structure, one end of the leaf spring 3 is fixed on a vehicle frame 1 through a bushing, a front leaf spring pin and a fixed end bracket 2, the other end of the leaf spring 3 is fixed on the vehicle frame 1 through a lifting lug 16, the bushing, a rear leaf spring pin and a lifting lug end bracket 17, the middle part of the leaf spring 3 is fixed on a front axle 10 through a U-shaped bolt 9, a cover plate 8 is padded between the upper surface of the leaf spring 3 and the U-shaped bolt 9, a backing plate 11 is padded between the lower surface of the leaf spring 3 and the front axle 10, a limiting block 13 is further fixed on the vehicle frame 1, the limiting block 13 is positioned above the front axle 10, a shock absorber 14 is arranged between the limiting block 13 and the U-shaped bolt 9, one end of the shock absorber 14 is connected with the front axle 10, still even there is stabilizer bar 6 on the front axle 10, stabilizer bar 6 one end is passed through stabilizer bar support 7 and is linked on front axle 10, and the other end passes through jib 5 and jib support 4 and links on frame 1, and the leaf spring is two leaf spring structures, and weight is heavy, and dynamic stiffness is big, has caused the damping effect poor, and the ride comfort is poor.

Disclosure of Invention

The invention aims to overcome the defects that the existing plate spring is a multi-leaf spring, so that the existing plate spring is heavy in weight, large in dynamic stiffness and poor in smoothness, and a single leaf spring has potential safety hazards under the condition of long-time work, and provides a front plate spring suspension system which is light in leaf spring, small in dynamic stiffness, good in smoothness and free of potential safety hazards.

In order to achieve the above purpose, the technical scheme of the invention is as follows:

A front leaf spring suspension system comprises a vehicle frame and a leaf spring, wherein the front end of the leaf spring in the advancing direction of a vehicle is a front rolling lug, the front rolling lug is fixed on the frame through a bush, a front steel plate spring pin and a fixed end bracket, the rear end of the plate spring in the advancing direction of the vehicle is a rear rolling lug, the rear rolling lug is fixed on the frame through a lifting lug, a bush, a rear steel plate spring pin and a lifting lug end bracket, the middle part of the plate spring is fixed on a front axle through a U-shaped bolt, a shock absorber is arranged between the front axle and the lifting lug end bracket, one end of the shock absorber is connected with the front axle through a lower bracket of the shock absorber, the other end of the shock absorber is fixed on the frame through an upper bracket of the shock absorber, the plate spring is a single-piece spring, a protection mechanism is arranged behind the lifting lug end support, one end of the protection mechanism is fixed on the frame, and the other end of the protection mechanism extends out towards the lower part of the frame and extends to the front back of the rear rolling lug.

The part of the protection mechanism fixed on the frame is a connecting frame, the part of the protection mechanism extending towards the lower part of the frame is a stop plate, one surface of the stop plate towards the back rolling lug is a stop surface, and the stop surface is opposite to the back rolling lug.

The link is "L" type structure, comprises vertical board and horizontal plate, all be equipped with the bolt hole on vertical board and the horizontal plate.

The middle of the stop plate is of a hollow structure.

The distance from the stop surface to the back rolling lug is a1, and when the lifting lug swings backwards to the maximum extent, a1 is 3-5 mm.

And an elastic body is arranged on the stop surface.

A cover plate is arranged between the upper surface of the plate spring and the U-shaped bolt, a base plate is arranged between the lower surface of the plate spring and the front axle, a limiting block is further fixed on the frame, and the limiting block is located above the front axle.

The frame is also connected with a transverse stabilizer bar, the transverse stabilizer bar is positioned between the front axle and the fixed end bracket, one end of the transverse stabilizer bar is connected on the front axle through a stabilizer bar bracket, and the other end of the transverse stabilizer bar is connected on the frame through a suspender and a suspender bracket.

Compared with the prior art, the invention has the beneficial effects that:

1. According to the invention, the spring is a single leaf spring, so that on one hand, a lighter single leaf spring is selected, the overall weight of the front leaf spring suspension is reduced, on the other hand, the dynamic stiffness of the leaf spring is reduced, the offset frequency is reduced, and the smoothness of an automobile is improved. Because the front half section of single leaf spring breaks the back, corresponds the front axle and can directly move backward, leads to the front wheel to turn to unusually, influences driving safety, so install a protection machanism behind lug end support additional, after the front half section of single leaf spring breaks, protection machanism can block the leaf spring that moves backward, avoids the front axle to move backward by a wide margin.

2. According to the invention, one surface of the stop plate facing the back rolling lug is a stop surface, the stop surface faces the back rolling lug, and the stop surface is a main contact surface between the broken single spring and the back rolling lug, so that a protection mechanism can be ensured to resist against the broken plate spring.

3. The connecting frame is of an L-shaped structure and comprises a vertical plate and a horizontal plate, and bolt holes are formed in the vertical plate and the horizontal plate. The connecting frame is of an L-shaped structure, so that the connection firmness of the protection mechanism and the frame is improved, and the protection mechanism is prevented from falling off due to strong impact; the stop plate is connected with the vertical plate, and the vertical plate is perpendicular to the plate spring, so that the stress direction of the protection mechanism is parallel to the frame, and the deformation of the protection mechanism is avoided.

4. The middle of the stop plate is of a hollow structure, so that the weight of the protection mechanism is reduced under the condition that the strength of the protection mechanism is not influenced.

5. The distance from the stop surface to the rear eye is a1, when the lifting lug swings backwards to the maximum extent, a1 is 3-5 mm, the safe distance for the front axle to move backwards after the front axle is broken is achieved, and abnormal steering is avoided.

6. The stop surface is provided with an elastic body. When the single-leaf spring normally works, the elastic body can reduce the force caused by the backward swing of the single-leaf spring, the vibration of a vehicle caused by overlarge inertia is avoided, and when the broken leaf spring impacts the protection mechanism, the elastic body can reduce the impact of the leaf spring on the protection mechanism due to the inertia, so that the safety is improved.

7. according to the invention, the cover plate is padded between the upper surface of the plate spring and the U-shaped bolt, the base plate is padded between the lower surface of the plate spring and the front axle for adjusting the vehicle height, the vehicle frame is also fixedly provided with the limiting block, and the limiting block is positioned above the front axle to avoid the collision between the front axle and the vehicle frame.

8. the transverse stabilizer bar is connected to the frame, so that the vehicle body is prevented from transversely inclining too much when turning, and the vehicle body is kept balanced as much as possible.

drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a front view of the prior art;

FIG. 3 is a perspective view of the protection mechanism;

FIG. 4 is a right side view of a portion of the present invention;

FIG. 5 is a front view of a portion of the structure of the present invention;

FIG. 6 is a front view of a portion of a second construction of the present invention;

in the figure: the suspension device comprises a frame 1, a fixed end bracket 2, a leaf spring 3, a back rolling lug 31, a front rolling lug 32, a suspension rod bracket 4, a suspension rod 5, a stabilizer bar 6, a stabilizer bar bracket 7, a cover plate 8, a U-shaped bolt 9, a front axle 10, a backing plate 11, a lower vibration absorber bracket 12, a limiting block 13, a vibration absorber 14, an upper vibration absorber bracket 15, a lifting lug 16, a back steel plate spring pin 161, a lifting lug end bracket 17, a protection mechanism 18, a stop plate 181, a connecting plate 182, a vertical plate 183, a horizontal plate 184, a bolt hole 185, a stop surface 186, an elastic body 187, and a distance a1 from the stop surface 186 to the back rolling.

Detailed Description

The present invention will be described in further detail with reference to the following description and embodiments in conjunction with the accompanying drawings.

Referring to fig. 1, 3, 4, 5 and 6, a front leaf spring suspension system comprises a vehicle frame 1 and a leaf spring 3, wherein the front end of the leaf spring 3 in the vehicle advancing direction is a front eye 32, the front eye 32 is fixed on the vehicle frame 1 through a bushing, a front leaf spring pin and a fixing end bracket 2, the bushing is arranged in the front eye 32, the front leaf spring pin penetrates through the bushing to fix the front eye 32 and the fixing end bracket 2 together, the rear end of the leaf spring 3 in the vehicle advancing direction is a rear eye 31, the rear eye 31 is fixed on the vehicle frame 1 through a lifting lug 16, a bushing, a rear leaf spring pin 161 and a lifting lug end bracket 17, the bushing is arranged in the rear eye 31, the rear leaf spring pin 161 penetrates through the bushing to fix the rear eye 31 and one end of the lifting lug 16 together, the other end of the lifting lug 16 is fixed on the lifting lug end bracket 17, the middle part of the leaf spring 3 is fixed on a front axle 10 through a U-shaped bolt 9, a shock absorber 14 is arranged between the front axle 10 and the lifting lug end support 17, one end of the shock absorber 14 is connected with the front axle 10 through a shock absorber lower support 12, the other end of the shock absorber 14 is fixed on the frame 1 through a shock absorber upper support 15, the plate spring 3 is a single plate spring, a protection mechanism 18 is arranged behind the lifting lug end support 17, one end of the protection mechanism 18 is fixed on the frame 1, and the other end of the protection mechanism extends out towards the lower part of the frame 1 and extends to the rear part right behind the rear rolling lug 32.

The protection mechanism 18 is made of metal or engineering plastic, the part of the protection mechanism 18 fixed on the vehicle frame 1 is a connecting frame 182, the part of the protection mechanism 18 extending towards the lower part of the vehicle frame 1 is a stop plate 181, one surface of the stop plate 181 facing the rear rolling lug 31 is a stop surface 186, and the stop surface 186 faces the rear rolling lug 31.

the stop plate 181 is a thick metal plate or a thick engineering plastic plate, the stop plate 181 is perpendicular to the upper cross beam of the frame 1, the stop plate 181 faces the side surface of the rear rolling lug 31 to form a stop surface 186, the stop plate 181 is located behind the stop surface 186 and has a hollow structure in the middle of the plate, or the stop plate 181 is perpendicular to the upper longitudinal beam of the frame 1 and faces the front surface of the rear rolling lug 31 to form the stop surface 186.

the connecting frame 182 is of an L-shaped structure and comprises a vertical plate 183 and a horizontal plate 184, and bolt holes 185 are formed in the vertical plate 183 and the horizontal plate 184.

The distance from the stop surface 186 to the rear rolling lug 31 is a1, and when the lifting lug 16 swings backwards maximally, the distance a1 is 3-5 mm.

An elastic body 187 is mounted on the stop surface 186.

A cover plate 8 is padded between the upper surface of the plate spring 3 and the U-shaped bolt 9, a backing plate 11 is padded between the lower surface of the plate spring 3 and the front axle 10, a limiting block 13 is further fixed on the frame 1, and the limiting block 13 is positioned above the front axle 10.

Still even have stabilizer bar 6 on frame 1, stabilizer bar 6 be located front axle 10 and stiff end support 2 between, stabilizer bar 6 one end is passed through stabilizer bar support 7 and is connected on front axle 10, and the other end passes through jib 5 and jib support 4 and is connected on frame 1.

The single leaf spring is light in weight, small in dynamic stiffness, low in offset frequency and capable of improving smoothness of an automobile, and the protective mechanism is used for limiting backward movement of the lifting lug.