CN111255851B

CN111255851B - Air suspension structure

Info

Publication number: CN111255851B
Application number: CN201911191161.2A
Authority: CN
Inventors: 李建华; 尹浩; 孙伟
Original assignee: Zhejiang Leapmotor Technology Co Ltd
Current assignee: Zhejiang Zero Run Technology Co Ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2021-06-22
Anticipated expiration: 2039-11-28
Also published as: CN111255851A

Abstract

The invention discloses an air suspension structure, aiming at solving the defects of poor performance and complex structure of the existing suspension universe. The engine suspension device comprises an upper end bolt connected with an engine, a suspension body, a shell and a main spring, wherein the upper end bolt is fixedly connected with the suspension body, the main spring is fixed on the suspension body in a vulcanization mode, the main spring is fixedly connected with the suspension body, the main spring is small in upper part and large in lower part, the bottom end of the main spring is open, the lower part of the main spring is fixedly connected with an exoskeleton through a vulcanization process, an upper shell is covered on the main spring, the bottom end of the upper shell is attached to the exoskeleton, an inner buckling edge is arranged on a lower shell, the upper shell and the exoskeleton are fixed in a matched mode through the inner buckling edge, the core part of the lower end of the main spring is concave, a throttling support is arranged at the bottom end of the main spring, the bottom of the main spring, the shell and the throttling support form. The air pressure of the circulation cavity is switched through the air vent, and the rigidity of the suspension under different frequency amplitudes is automatically adjusted.

Description

Air suspension structure

Technical Field

The invention relates to the field of automobile parts, in particular to an air suspension structure.

Background

The vibrations that automobile engine produced can be conducted on the automobile body that is connected, bring vibrations, influence and take experience. It is currently the practice to provide a suspension structure between the vehicle body and the engine, and to eliminate the vibrations from the vehicle body by means of a damping system inside the suspension structure. The existing damping system comprises a hydraulic suspension and a pure rubber suspension, and the suspension types have good damping or vibration isolation effects in suitable frequency bands, and can not meet global requirements only when being used in a static or cruising state of an automobile. For low frequency large amplitude motions, the suspension needs to have a larger stiffness, and for high frequency small amplitudes, the suspension needs to have a smaller stiffness.

At present, the market has a contradiction that the low-frequency large amplitude and the high-frequency small amplitude can not be compatible by combining various damping modes or switching under the turning and cruising states by adopting an electromagnetic switching hole. However, the adoption of the mode also causes new problems, namely the electromagnetic mode switching mode causes serious coupling of the automobile, once an electric system fails, the mechanical performance of the whole machine is greatly influenced, and the reliability of the suspension is greatly reduced. There is a need for a suspension structure with a simple structure that satisfies the global requirement to meet the practical requirement.

Chinese patent publication No. CN208793510U, the name is a hydraulic suspension and includes this hydraulic suspension's hydraulic suspension system, and this application discloses a hydraulic suspension and includes this hydraulic suspension's hydraulic suspension system, hydraulic suspension includes support, main spring, runner mechanism, sealing member and is used for fixing the mounting of sealing member, be formed with hydraulic pressure chamber in the support, runner mechanism installs the hydraulic pressure intracavity, main spring sets up respectively with the sealing member the relative both sides of runner mechanism, the support is formed with the confession the installing port of installation is gone into to the mounting card, the support perhaps runner mechanism is provided with first knot portion of holding, the mounting be provided with the second knot portion of holding is held in first knot portion of holding. The fixing piece is installed in a clamping mode, and the installation mode is convenient; the first buckling part and the second buckling part are used for buckling, holding and limiting the clamped fixing piece, and then the sealing element is fixed. It has the defects of poor performance and complex structure of the suspension universe.

Disclosure of Invention

The invention overcomes the defects of poor performance and complex structure of the existing suspension universe, and provides an air suspension structure which can simultaneously absorb shock without depending on an electric control device.

In order to solve the technical problems, the invention adopts the following technical scheme:

the utility model provides an air suspension structure, is including connecting the upper end bolt, suspension body, casing and the main spring of engine, upper end bolt fixed connection suspension body, main spring pass through the vulcanization mode and fix to the suspension body on, main spring and suspension body fixed connection, big end down, bottom are opened on the main spring, and main spring lower part is through vulcanization technology fixedly connected with ectoskeleton, and the casing includes casing and lower casing down, goes up casing cover dress on main spring, goes up the bottom laminating ectoskeleton of casing, is equipped with interior lock edge down on the casing, it is fixed through cooperating with interior lock edge to go up casing and ectoskeleton, main spring lower extreme core portion is sunken, and the main spring bottom is equipped with the throttle support, main spring bottom, casing and throttle support form the damping cavity, are equipped with the orifice on the throttle support, and gas can flow in or flow out the damping cavity through the orifice.

The main springs are fixedly connected to the suspension body and the exoskeleton through vulcanization processes respectively. The suspension body is of a columnar structure, the middle part of the suspension body is in a disc shape and protrudes outwards, the bottom of the suspension body is a slender rod body, and the top of the suspension body is fixedly connected with an upper end bolt through threaded connection or other fixed connection modes. The main spring is contained on the suspension body, and the middle part of the upper shell is provided with a through hole which passes through the suspension body and is covered on the main spring. The upper shell is in a horn mouth shape with a small upper part and a big lower part, the bottom end of the upper shell is attached to the top end of the outer skeleton, and the upper shell and the lower shell are inserted in the inner buckling edge of the lower shell to complete positioning. The upper part of the exoskeleton is big at the top and small at the bottom, the outer diameter of the middle part is larger than the bottom end of the upper part, a step for positioning the main spring is formed, and the bottom part is inserted between the exoskeleton and the lower bottom cover to play a role in sealing. The cavity formed by the concave part of the core part at the bottom end of the main spring is a cavity formed by the rotation of a parabola along the axis of the cavity. The cavity is large in size, large in size change when the main spring deforms, and large air pressure change is generated, so that damping movement is sufficient. When the gas flows out through the throttling hole, the kinetic energy of the gas flow is converted into internal energy, the damping effect is realized, and the structure is simple. The effect is good.

Preferably, the top end of the main spring is further provided with a butting ring, and a limiting gap is formed between the butting ring and the shell. When the automobile does low-frequency high-load motion, the deformation amount of the main spring is large, the abutting ring can impact the top of the upper shell along with the motion of the main spring, and the abutting ring is directly abutted to the shell due to the fact that the rigidity of the abutting ring is low and the diameter of the abutting ring is large in the radial direction, so that the rigidity is further improved, and the damping performance under the working condition of large amplitude of a low-frequency forest is improved; in addition, since the main spring in this state abuts against the upper case in all radial directions, the damping performance in the non-vertical direction is also improved.

Preferably, the bottom end of the exoskeleton is open, a lower bottom cover is installed on the exoskeleton, and the lower bottom cover and the throttling support form a circulation cavity. The lower bottom cover and the throttling support form a closed cavity, and the circulation cavity is internally closed when gas is interacted with the damping cavity, so that the rigidity of the whole device is high, and the device is suitable for low-frequency high-amplitude motion.

Preferably, the lower shell is fixedly inserted on a connecting plate, and the connecting plate is fixedly connected to the vehicle body. The structure realizes the connection between the engine and the vehicle body, and the vibration from the Z direction can be better absorbed by adopting a plug-in mounting mode.

Preferably, the lower bottom cover is provided with a vent hole, the vent hole is communicated with the atmosphere, two ends of the vent hole are respectively provided with a cap, the cap and the outer edge of the vent hole are connected with a flexible connecting rod, and the dynamic stiffness of the connecting rod under high frequency is larger than that of the main spring. When the circulation cavity is in a low-frequency high-amplitude state, the length of the flexible connecting rod is shorter than the amplitude, the cap cover on one side is thrown away, the other end of the flexible connecting rod can be quickly attached to the vent hole to complete sealing, so that the circulation cavity is still in a sealed state in the whole vibration process, and the suspension rigidity in the state is improved; and when being in the low amplitude state of high frequency, the dynamic stiffness of connecting rod is higher, can equate to the body of rod of rigidity, and the block at air vent both ends is all opened, and the lower bottom cover is in with atmosphere communicating state this moment, and the air vent under this state is in open state, and the rigidity of suspension so this moment is less, has better cushioning effect.

Preferably, the throttle hole is arranged at the center of the throttle bracket. The structure ensures that the distance from each position of the cavity to the throttling hole is shortest and the damping effect is best.

Preferably, the orifice has a bell mouth shape with a large upper part and a small lower part. The diameter of the throttling hole is changed, so that the air pressure at the position of the throttling hole of the small port is larger, the air pressure change when the throttling hole reaches the other end is larger, and a better throttling effect is achieved.

Preferably, the core space of the flow-through chamber becomes gradually larger to the outer peripheral space. The arrangement is to gradually increase the air pressure close to the throttle hole to achieve a better damping effect.

Preferably, the vent hole is formed at an outer circumferential position of the lower bottom cover. The above structure is that the vent hole is arranged at the outer peripheral position of the lower bottom cover far from the orifice hole in order to weaken the situation as much as possible because the vent hole has a short opening time and low rigidity in the low frequency state.

Compared with the prior art, the invention has the beneficial effects that: (1) the rigidity of the main spring in a low-frequency state is improved through the abutting ring, and the damping is improved; (2) the air pressure of the circulation cavity is switched through the air vent, and the rigidity of the suspension under different frequency amplitudes is automatically adjusted.

Drawings

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

FIG. 2 is a top view of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2 in accordance with the present invention;

FIG. 4 is an enlarged view of the invention at FIG. 3B;

in the figure: upper end bolt 1, suspension body 2, main spring 3, ectoskeleton 4, go up casing 5, lower casing 6, interior lock is followed 7, damping cavity 8, orifice 9, butt circle 10, spacing clearance 11, lower bottom 12, throttle support 13, circulation cavity 14, connecting plate 15, air vent 16, cap 17, connecting rod 18.

Detailed Description

The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings:

an air suspension structure, as shown in fig. 1, 2, 3, including upper end bolt 1, suspension body 2, casing and main spring 3 of connecting the engine, upper end bolt 1 fixed connection suspension body 2, main spring 3 is fixed to suspension body 2 through the vulcanization mode, main spring 3 and suspension body 2 fixed connection, main spring 3 is big end down, the bottom is open, main spring 3 lower part is through vulcanization technology fixedly connected with ectoskeleton 4, the casing includes casing 5 and lower casing 6, goes up 5 covers of casing and adorns on main spring 3, goes up the laminating ectoskeleton 4 of casing 5's bottom, is equipped with interior lock edge 7 on casing 6 down, go up casing 5 and ectoskeleton 4 through with interior lock edge 7 cooperation fixed. The bottom end of the exoskeleton 4 is open, a lower bottom cover 12 is arranged on the exoskeleton 4, and the lower bottom cover 12 and the throttling support 13 form a circulation cavity 14. The lower bottom cover 12 and the throttling support 13 form a closed cavity, and the circulation cavity 14 is internally closed when gas is interacted with the damping cavity 8, so that the rigidity of the whole device is higher, and the device is suitable for low-frequency and high-amplitude motion. The core part of the lower end of the main spring 3 is concave, the bottom end of the main spring 3 is provided with a throttling support 13, and the bottom of the main spring 3, the shell and the throttling support 13 form a damping cavity 8. The core space to the outer peripheral space of the flow-through chamber 14 becomes gradually larger. This arrangement is to increase the air pressure in stages close to the orifice 9 for better damping.

The throttle bracket 13 is provided with a throttle hole 9, and gas can flow into or out of the damping cavity 8 through the throttle hole 9. The throttle hole 9 is provided at a central position of the throttle bracket 13. The structure ensures that the distance from each position of the cavity to the throttling hole 9 is shortest, and the damping effect is best. The orifice 9 has a bell mouth shape with a large upper part and a small lower part. The diameter of the throttle hole 9 is changed, so that the air pressure at the position of the throttle hole 9 of the small port is larger, the air pressure change when the throttle hole reaches the other end is larger, and a better throttling effect is achieved. The lower shell 6 is fixedly inserted on the connecting plate 15, the connecting plate 15 is fixedly connected to the vehicle body, the structure realizes connection between the engine and the vehicle body, and vibration from the Z direction can be better reduced by adopting an insertion mode.

As shown in fig. 4, the lower bottom cover 12 is provided with a vent hole 16, the vent hole 16 is communicated with the atmosphere, two ends of the vent hole 16 are respectively provided with a cap 17, the cap 17 and the outer edge of the vent hole 16 are connected with a flexible connecting rod 18, and the dynamic stiffness of the connecting rod 18 under high frequency is greater than that of the main spring 3. When the circulation cavity 14 is in a low-frequency high-amplitude state, the length of the flexible connecting rod 18 is shorter than the amplitude, the cap 17 on one side is thrown away, the other end of the flexible connecting rod can be quickly attached to the vent hole 16 to complete sealing, so that the circulation cavity 14 is still in a sealed state in the whole vibration process, and the suspension rigidity in the state is improved; and when in the low amplitude state of high frequency, the dynamic stiffness of the tie rod 18 is higher, can equate to the body of rigid rod, the block at both ends of the air vent 16 is all opened, the lower bottom cover 12 is in the state of communicating with atmosphere at this moment, the air vent 16 under this state is in the open condition, the suspended stiffness at this moment is minor, have better cushioning effect. The vent hole 16 is provided at an outer circumferential position of the lower cover 12. This structure is because the vent hole 16 has a short opening time and a low rigidity in a low frequency state, and in order to attenuate the occurrence of this as much as possible, the vent hole 16 is provided at a position on the outer periphery of the lower bottom cover 12 apart from the orifice 9.

The main spring 3 is fixedly connected to the suspension body 2 and the exoskeleton 4 through vulcanization processes respectively. The suspension body 2 is of a columnar structure, the middle part of the suspension body is in a disc shape and protrudes outwards, the bottom of the suspension body is a slender rod body, and the top of the suspension body is fixedly connected with an upper end bolt 1 through threaded connection or other fixed connection modes. The main spring 3 is enclosed on the suspension body 2, and the middle part of the upper shell 5 is provided with a through hole passing through the suspension body 2 and is covered on the main spring 3. The upper shell 5 is in a horn mouth shape with a small upper part and a big lower part, the bottom end of the upper shell is attached to the top end of the exoskeleton 4, and the upper shell and the exoskeleton are inserted into an inner buckling edge 7 of the lower shell 6 to complete positioning. The upper part of the exoskeleton 4 is big at the top and small at the bottom, the outer diameter of the middle part is larger than the bottom end of the upper part to form a step for positioning the main spring 3, and the bottom part is inserted between the exoskeleton 4 and the lower bottom cover 12 to play a role in sealing. The cavity formed by the concave part of the core part at the bottom end of the main spring 3 is a cavity formed by the rotation of a parabola along the axis of the cavity. The cavity is large in size, and when the main spring 3 deforms, the cavity has large size change, larger air pressure change is generated, and damping movement is sufficient. When the gas flows out through the throttling hole 9, the kinetic energy of the gas flow is converted into internal energy, the damping effect is realized, and the structure is simple. The effect is good.

The top end of the main spring 3 is also provided with a butting ring 10, and a limiting gap 11 is arranged between the butting ring 10 and the upper shell. When the automobile does low-frequency high-load motion, the deformation amount of the main spring 3 is large, the abutting ring 10 impacts the top of the upper shell 5 along with the motion of the main spring 3, and the diameter of the abutting ring is increased in the radial direction due to the low rigidity of the abutting ring, so that the abutting ring is directly abutted to the shell, the rigidity is further improved, and the damping performance under the working condition of large amplitude of a low-frequency forest is improved; further, since the main spring 3 in this state abuts the upper case 5 in both radial directions, the damping performance with respect to the non-vertical direction is also improved.

The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the appended claims.

Claims

1. An air suspension structure comprises an upper end bolt connected with an engine, a suspension body, a shell and a main spring, and is characterized in that the upper end bolt is fixedly connected with the suspension body, the main spring is fixed on the suspension body in a vulcanization mode, the main spring is fixedly connected with the suspension body, the main spring is big end down, the bottom end of the main spring is open, the lower part of the main spring is fixedly connected with an exoskeleton through a vulcanization process, the shell comprises an upper shell and a lower shell, the upper shell is covered on the main spring, the bottom end of the upper shell is attached to an exoskeleton, the lower shell is provided with an inner buckling edge, the upper shell and the exoskeleton are fixed by matching with the inner buckling edge, the core part at the lower end of the main spring is concave, the bottom end of the main spring is provided with a throttling bracket, the bottom of the main spring, the shell and the throttling bracket form a damping cavity, gas can flow into or out, the exoskeleton is provided with a lower bottom cover, the lower bottom cover and the throttling support form a circulation cavity, the lower bottom cover is provided with a vent hole, the vent hole is communicated with the atmosphere, two ends of the vent hole are respectively provided with a cap, the cap and the outer edge of the vent hole are connected with a flexible connecting rod, and the dynamic stiffness of the connecting rod under high frequency is larger than that of the main spring.

2. An air suspension structure as claimed in claim 1 wherein the main spring is further provided with an abutment ring at the top end thereof, said abutment ring being spaced from the housing by a spacing gap.

3. An air suspension structure as claimed in claim 1 wherein said lower housing is fixedly inserted into a web which is fixedly attached to the vehicle body.

4. An air suspension arrangement according to claim 1, wherein the throttle orifice is arranged centrally in the throttle bracket.

5. An air suspension as claimed in claim 4 wherein said orifice has a flared upper and lower orifice diameter.

6. An air suspension structure as claimed in claim 3, wherein the core space of said flow-through chamber becomes gradually larger to the peripheral space.

7. An air suspension structure as claimed in claim 1, wherein said air vent is provided at a peripheral position of the lower cover.