CN105059074A - Suspension limiting stopper with overload protection function, suspension system and vehicle - Google Patents

Abstract

The invention discloses a suspension limiter with an overload protection function, a suspension system and a vehicle. The suspension limiter with overload protection function includes a box-shaped limiter seat (11) with one end open and a rubber block (12), and one end of the rubber block (12) is arranged on the limiter. In the limiter seat (11), the other end of the rubber block (12) is located outside the limiter seat (11). When the suspension limiter is overloaded, the rubber block (12) can Pressed into the stopper seat (11). The suspension limiter of the present invention can withstand overload and limit the position effectively, ensuring that the limiter itself is not damaged. Moreover, the limiter has a simple structure and low manufacturing and processing costs, and can effectively increase the service life of the limiter and improve the reliability and safety of the suspension system while ensuring the ride comfort of the suspension system.

Description

Suspension stop with overload protection, suspension system and vehicle

technical field

The invention relates to the field of vehicle suspension, in particular to a suspension limiter with an overload protection function, a suspension system and a vehicle with the limiter.

Background technique

The new generation of super-heavy-duty off-road chassis mostly adopts double-wishbone independent suspension system. Due to the higher speed and stronger off-road performance of the super-heavy-duty off-road chassis, the number of times the suspension limiter of the chassis works significantly increases during use. Therefore, the requirement for the life of the limiter is increased.

The full-load axle load of the super-heavy-duty chassis is large, and the load changes greatly when changing from empty to full load. When changing from no-load to full-load, it is necessary to rely on the limiter to bear the large impact load and limit the suspension guide mechanism.

Moreover, when the super-heavy chassis is required to be transported by rail, in order to ensure the safety of transportation and the height of the vehicle does not exceed the limit, it is necessary to lower the height of the vehicle through the height adjustment system, which causes the limiter to be squeezed for a long time.

In particular, the super-heavy-duty chassis requires the suspension system to have higher reliability and safety. When the elastic element fails, the limiter must be able to withstand overload and effectively limit the position to ensure that the limiter itself is not damaged. Existing stoppers do not have overload protection function, such as the rubber stopper in the rear suspension stopper of heavy-duty vehicles disclosed in patent CN203793060U. Therefore, it is necessary to design a limiter that meets the above requirements.

Contents of the invention

The object of the present invention is to provide a suspension limiter with simple structure and overload protection function. The device can withstand overload and effectively limit the position, so as to ensure that the limiter itself is not damaged.

In order to achieve the above object, the present invention provides a suspension limiter with overload protection function, comprising a box-shaped limiter seat with one end open and a rubber block, one end of the rubber block is arranged on the limiter The other end of the rubber block is located outside the limiter seat, and when the suspension limiter is overloaded, the rubber block can be pressed into the limiter seat.

Preferably, the rubber block is vulcanized connected with the limiter seat.

Preferably, a mounting boss is provided on the bottom surface of the inner cavity of the stopper seat, and the installation boss protrudes from the bottom surface of the inner cavity of the stopper seat, and the rubber block is provided with a Groove for boss fit.

Further preferably, a threaded hole is opened on the bottom surface of the limiter seat, and the threaded hole passes through the bottom surface of the limiter seat and the installation boss.

Preferably, a chamfer is provided between the side of the inner cavity of the stopper seat and the end surface of the open end of the stopper seat, so as to form an accommodation space for the compressed rubber block.

Preferably, the shape of the limiter seat is a rectangular box, and the rubber block includes a quadrangular prism structure connected to the limiter seat and a quadrangular pyramid structure connected to the quadrangular truncated structure, The quadrangular pyramid truncated portion is located outside the limiter seat, and the cross-sectional area of the quadrangular pyramid truncated gradually decreases along the direction from the inside of the limiter seat to the outside of the limiter seat.

Preferably, the end surface of the quadrangular pyramid located at the outer end of the limiter seat is a curved surface protruding along the direction from the inside of the limiter seat to the outside of the limiter seat.

Preferably, the edges of the quadrangular truncated pyramid are all rounded.

Compared with the prior art, the suspension limiter with overload protection function provided by the present invention is provided with a limiter seat and a rubber block with one end disposed in the limiter seat and the other end protruding from the limiter seat, When the wheel jumps up, the lower cross arm gradually contacts and compresses the rubber block, and the rubber block is gradually compressed to the limit to realize the suspension limit. When the spring (oil-pneumatic spring) connected to the upper beam of the suspension fails, the axle load is fully transmitted to the limiter, the limiter is overloaded, the rubber block is compressed into the limiter, and the edge of the limiter and the lower cross arm Rigid contact realizes reliable limit, so the device can withstand overload and effectively limit, and ensure that the limiter itself is not damaged.

Another object of the present invention is to provide a suspension system capable of providing the suspension system with an overload protection function.

In order to achieve the above object, the suspension system provided by the present invention includes a wheel set assembly, a vehicle frame, a lower cross arm whose two ends are respectively hinged with the described wheel set assembly and the described vehicle frame, and two ends respectively connected with the described wheel set The assembly is hinged with the upper cross arm of the vehicle frame, and the spring whose lower end is hinged on the upper cross arm, the upper cross arm is located above the lower cross arm, and both the upper cross arm and the lower cross arm are It is composed of two arms hinged, the lower end of the spring is located at the hinge point of the two arms of the upper cross arm between the wheel set assembly and the vehicle frame, and the upper surface of the lower cross arm A limiting plane is set on the top, and the frame has a protruding part protruding toward the space between the upper cross arm and the lower cross arm, and the above-mentioned overload protection function is provided on the lower end surface of the protruding part. The suspension limiter, the rubber block of the suspension limiter can be in contact with the limit plane, and the upper end surface of the protrusion is provided with a limiter capable of contacting the lower side of the upper cross arm screw.

Another object of the present invention is to provide a vehicle with an overload protection function.

In order to achieve the above object, the present invention provides a vehicle comprising the above suspension system.

Compared with the prior art, the suspension system and the vehicle have the same advantages as the above-mentioned suspension limiter with overload protection function, which will not be repeated here.

The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 present invention has the structural representation (sectional view) of the suspension limiter of overload protection function;

Fig. 2 is the perspective view of the stopper seat of the suspension stopper with overload protection function of the present invention;

Fig. 3 is the perspective view of the rubber block of the suspension limiter with overload protection function of the present invention;

Fig. 4 is the structural representation of suspension system of the present invention;

Fig. 5 is a schematic diagram of the installation structure of the suspension limiter with overload protection function of the present invention, wherein Fig. 1 is a sectional view along the A-A direction in Fig. 5;

Reference signs:

1-spring; 2-upper cross arm; 3-limit screw; 4-suspension limiter; 5-frame; 6-lower cross arm; 7-wheel assembly; 8-wheel; 9-bolt; 10-spring washer; 11-limiter seat; 12-rubber block.

Detailed ways

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

In the present invention, unless stated otherwise, the orientation words used such as "up, down, left, and right" usually refer to the orientation of the suspension stopper in normal use, which is consistent with the orientation shown in Figure 4 , "inner and outer" refers to the limiter seat, which refers to the inner cavity and the outside of the limiter seat. The above-mentioned orientation words are defined for the convenience of understanding the present invention, and do not limit the protection scope of the present invention.

1-3, as a basic embodiment of the present invention, the suspension limiter with overload protection function of the present invention includes a box-shaped limiter seat 11 with an open end and a rubber block 12. One end of the block 12 is arranged in the limiter seat 11, and the other end of the rubber block 12 is located outside the limiter seat 11. When the suspension limiter is overloaded, the rubber block 12 Can be pressed into the stopper seat 11.

The limiter seat 11 in the present invention is made of rigid materials such as alloy steel to improve its deformation resistance.

The suspension limiter of the present invention is installed on the bracket provided by the vehicle frame through bolts, and the installation position corresponds to the limit plane position of the lower cross arm of the suspension. When the wheel jumps up, the lower cross arm gradually contacts and compresses the position of the limiter. The rubber block 12 is compressed to the limit to realize the suspension limit.

The box-shaped structure of the limiter seat 11 in the present invention can ensure that after the rubber block 12 falls off, the box-shaped structure can limit the position of the suspension guide mechanism to ensure the safety of the vehicle roll and protect the elastic elements.

In the present invention, the rubber block 12 and the stopper seat 11 can be connected in various ways, such as bonding or bolt connection, etc. In the present invention, preferably the rubber block 12 and the stopper seat 11 vulcanized connections.

In order to improve the connection strength between the rubber block 12 and the stopper seat 11, a mounting boss is provided on the inner cavity bottom surface of the stopper seat 11, and the installation boss and the stopper seat 11 are integrally structured. The mounting boss protrudes from the bottom surface of the inner cavity of the limiter seat 11, and the rubber block 12 is provided with a groove matching the mounting boss. By providing the installation boss, the contact area between the rubber block 12 and the stopper seat 11 (including the installation boss) can be further increased, thereby increasing the vulcanization strength and preventing the rubber block 12 from falling off from the stopper seat 11 .

In one embodiment of the present invention, a threaded hole is opened on the bottom surface of the stopper seat 11, and the threaded hole runs through the bottom surface of the stopper seat 11 and the mounting boss, thereby providing a suspension The installation interface of the limiter. Those skilled in the art should understand that the limiter of the present invention can also be connected by existing common connection methods, such as welding and riveting.

In one embodiment of the present invention, in order to prevent the rubber block from being continuously sheared and damaged when being squeezed, and to ensure that the rubber block is not crushed when the limiter is overloaded, the inner cavity side of the limiter seat 11 A chamfer is provided between the end surface of the open end of the limiter seat 11 to form a storage space for the compressed rubber block 12 . Wherein the chamfer can be set as a straight chamfer or a concave round chamfer according to the shape of the rubber block. The side of the inner cavity of the limiter seat 11 refers to the inner ring side of the limiter seat 11 . The chamfer at the inner ring of the limiter seat is a large chamfer, and its size is calculated by matching the compression amount of the rubber block. The space formed by the chamfering is used as the accommodation space for the compressed rubber block 12, so as to prevent the rubber block 12 from being squeezed between the end face of the stopper seat and the plane of the lower cross arm during the working process of the stopper, and being continuously sheared, The extrusion causes the rubber block 12 to crack early. When the chassis is converted from no-load to full-load, the limiter bears a large impact load. During the railway transportation of the chassis, the height of the vehicle decreases, and the limiter is in a compressed state for a long time. Because the above-mentioned limiter structure can protect the rubber block, Therefore, the rubber block will not crack.

Further preferably, the stopper seat 11 is a rectangular box, and the rubber block 12 includes a square truncated truss structure connected to the stopper seat 11 and a square truncated pyramid connected to the square truss structure structure, the part of the quadrangular pyramid is located outside the stopper seat 11, and the cross-sectional area of the quadrangular pyramid is gradually reduced along the direction from the inside of the stopper seat 11 to the outside of the stopper seat 11.

In this embodiment, the shape of the rubber block 12 is compatible with the limiter seat 11, the upper end is a cuboid, and the lower end is designed as a rectangular pyramid structure. The cuboid structure at the upper end ensures the contact area with the stopper seat 11 to ensure the vulcanization strength; the lower end is a pyramidal truncated structure to reduce the rubber volume, so that the deformation of the rubber block 12 after compression can adapt to the space of the stopper seat 11. The stiffness of the rubber block is determined by matching the axle load and the stiffness of the elastic element.

Preferably, the end face of the quadrangular pyramid located at the outer end of the stopper seat 11 is a curved surface (a convex curved surface) protruding from the inside of the stopper seat 11 to the outside of the stopper seat 11, In order to realize that when the rubber block 12 is in contact with the limit plane on the lower cross arm, the contact area gradually increases from small to achieve the purpose of reducing noise.

Further, the edges of the quadrangular pyramid truncated are all rounded (that is, the edges are rounded), so as to further prevent the rubber block 12 from being crushed.

The limiter seat 11 in the present invention can effectively protect the rubber block 12, and ensure that the rubber block 12 is not damaged under heavy load impact, long-term repeated compression and other working conditions; the vulcanization strength of the rubber block 12 and the limiter seat 11 is high , to prevent the rubber block 12 from falling off after a long time of use. Moreover, the limiter has a simple structure and low manufacturing and processing costs, and can effectively increase the service life of the limiter and improve the reliability and safety of the suspension system while ensuring the ride comfort of the suspension system.

In another embodiment of the present invention, a suspension system is also provided, as shown in Fig. 4 and Fig. 5, the suspension system includes a wheel set assembly 7, a vehicle frame 5, two ends respectively connected to the wheels The lower cross arm 6 articulated between the group assembly 7 and the vehicle frame 5 , the upper cross arm 2 articulated at both ends of the wheel set assembly 7 and the vehicle frame 5 , and the lower end is articulated on the upper cross arm Spring 1 on 2. Spring 1 is an oil-pneumatic spring. The upper cross arm 2 is located above the lower cross arm 6, the upper cross arm 2 and the lower cross arm 6 are hinged by two arms, and the lower end of the spring 1 is located at the two ends of the upper cross arm 2 At the hinge point of the root support arm, a limiting plane is arranged on the upper surface of the lower cross arm 6, and the vehicle frame 5 has a protrusion protruding toward the space between the upper cross arm 2 and the lower cross arm 6 part, the lower end surface of the protruding part is provided with a suspension limiter 4 with an overload protection function, the rubber block 12 of the suspension limiter 4 can be in contact with the limit plane, and the protrusion A limit screw 3 capable of contacting the lower side of the upper cross arm 2 is arranged on the upper end surface of the outlet portion.

Among them, the oil-gas spring is the elastic element of the suspension and also serves as a damping element. Specifically, the oil-gas spring is hinged with the upper cross arm 2 through a pin, the upper cross arm 2 is hinged with the frame 5 through a pin, and the lower cross arm 6 is connected with the vehicle. The frame 5 is hingedly connected by pin shafts, the upper cross arm 2 and the lower cross arm 6 are connected with the wheel assembly 7, the wheels 8 are connected with the wheel assembly, and the limit screw 3 is connected with the vehicle frame as the lower limit device of the suspension to realize the lower limit. Position function, the limiter 4 is connected with the protrusion of the vehicle frame through the bolt 9, the spring washer 10 (as shown in Figure 5).

The present invention also provides a vehicle with the above-mentioned suspension system.

The preferred embodiment of the present invention has been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the specific details of the above embodiment, within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, These simple modifications all belong to the protection scope of the present invention.

In addition, it should be noted that the various specific technical features described in the above specific implementation manners may be combined in any suitable manner if there is no contradiction. In order to avoid unnecessary repetition, various possible combinations are not further described in the present invention.

In addition, various combinations of different embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.

Claims (10)

1. one kind has the suspension limiting device of overload protection function; it is characterized in that; comprise limiting device seat (11) and the rubber block (12) of the box-like of open at one end; one end of described rubber block (12) is arranged in described limiting device seat (11); the other end of described rubber block (12) is positioned at described limiting device seat (11) outward; when described suspension limiting device bears overload, described rubber block (12) can be pressed in described limiting device seat (11).

2. the suspension limiting device with overload protection function according to claim 1, is characterized in that, described rubber block (12) is connected with the sulfuration of described limiting device seat (11).

3. the suspension limiting device with overload protection function according to claim 2; it is characterized in that; the inner chamber bottom surface of described limiting device seat (11) is provided with installation base; described installation base protrudes from the inner chamber bottom surface of described limiting device seat (11), described rubber block (12) is provided with the groove coordinated with described installation base.

4. the suspension limiting device with overload protection function according to claim 3; it is characterized in that; the bottom surface of described limiting device seat (11) offers tapped bore, and described tapped bore runs through the bottom surface of described limiting device seat (11) and described installation base.

5. the suspension limiting device with overload protection function as claimed in any of claims 1 to 4; it is characterized in that; chamfering is provided with, to form the spatial accommodation of the described rubber block (12) after compression between the inner chamber side of described limiting device seat (11) and the end face of limiting device seat (11) opening end.

6. the suspension limiting device with overload protection function according to claim 5; it is characterized in that; described limiting device seat (11) is rectangular box body; described rubber block (12) comprises the truncated rectangular pyramids structure that is connected with described limiting device seat (11) and the tetragonous cone table structure with described truncated rectangular pyramids anatomical connectivity; described tetragonous cone table part is positioned at described limiting device seat (11) outside, and described tetragonous cone table reduces along in described limiting device seat (11) gradually to the direction cross-sectional area limiting device seat (11).

7. the suspension limiting device with overload protection function according to claim 6; it is characterized in that, the end face that described tetragonous cone table is positioned at described limiting device seat (11) outer end is the curved surface that edge is protruded from described limiting device seat (11) to the direction limiting device seat (11).

8. the suspension limiting device with overload protection function according to claim 6, it is characterized in that, the seamed edge of described tetragonous cone table is all set to fillet.

9. a suspension system, it is characterized in that, comprise wheels assembly (7), vehicle frame (5), two ends respectively with described wheels assembly (7) and the hinged lower cross arm (6) of described vehicle frame (5), two ends respectively with described wheels assembly (7) and the hinged Top Crossbeam (2) of described vehicle frame (5), and lower end is hinged on the spring (1) on described Top Crossbeam (2), described Top Crossbeam (2) is positioned at the top of described lower cross arm (6), described Top Crossbeam (2) and lower cross arm (6) form by two support arms are hinged, the lower end of described spring (1) is positioned at the hinge-point place of two support arms of the Top Crossbeam (2) between described wheels assembly (7) and described vehicle frame (5), the upper surface of described lower cross arm (6) is provided with spacing plane, described vehicle frame (5) has the salient protruded to the space between described Top Crossbeam (2) and lower cross arm (6), the lower surface of described salient is provided with as the suspension limiting device (4) with overload protection function in claim 1-8 as described in any one, the rubber block (12) of described suspension limiting device (4) can with described spacing plane contact, the upper surface of described salient is provided with the stop screw (3) that can contact with the downside of described Top Crossbeam (2).

10. a vehicle, is characterized in that, comprises suspension system as claimed in claim 9.