Patent Description:
Along with the improvement of living standard of people, the driving of the off-road vehicle is pursued by comfort in the driving process on a paved road, and by stability and passing capacity in the driving process on a non-paved road. The vehicle runs on the road, along with the change of potholes on the road surface, wheels are subjected to expansion and contraction change under the support of suspension, relative axial position change is also generated on a piston rod of a shock absorber, the larger the relative position change is, the more serious the bumps of the vehicle is. In order to make drivers and passengers more comfortable, the higher damping is required, and further, the change of the damping value is expected to be synchronous with the change of potholes on the road surface. However, the damping value of the existing shock absorber is fixed, the whole damping strength of the shock absorber is adjusted by manually predicting the road condition, and a driver is needed to get off to rotate an adjusting knob, which is very inconvenient, the shock absorber can only have a relatively fixed damping value even if an electric control motor is adopted for adjustment, and the change of the road condition and the damping value cannot be kept synchronous at any time.

Document <CIT>, considered as the closest prior art, discloses a shock absorber with variable damping comprising a pin sliding in a hollow piston rod.

The present disclosure aims to provide an adaptive damping shock absorber for automobile, which increases or decreases damping according to a variable, realizes adaptive adjustment of damping of an automobile under any road condition, and enables the change of the damping value to be synchronous with the change of the road condition, so that the automobile runs more smoothly and comfortably.

In order to achieve the purpose, the present disclosure provides an adaptive damping shock absorber for automobile, comprising a cylinder barrel, a piston rod, a damping valve and a nitrogen tank, the adaptive damping shock absorber for automobile further comprises a flute-like assembly arranged in the cylinder barrel, the flute-like assembly comprises a core tube seat, an inner tube and an outer tube, wherein each of two ends of the outer tube are provided with at least one row of damping through-holes, , one of the two ends of the outer tube is provided with a first check valve and is inserted into the piston rod, another of the two ends of the outer tube is arranged on the core tube seat and is connected with the nitrogen tank via a first oil tube pipeline, the core tube seat is communicated with the first oil tube pipeline via a second check valve, the inner tube is arranged in the outer tube, a bottom end of the inner tube is fixed on the core tube seat and is connected with the nitrogen tank via a second oil tube pipeline, the core tube seat is fixed to a bottom of the cylinder barrel, the damping valve is fixed to one end of the piston rod and is arranged in the cylinder barrel, one end of the piston rod has a sealing pipe fixed thereto, and another end of the piston rod passes through an end cover of the cylinder barrel and is provided with a lower lug, and an upper lug is fixed to the bottom of the cylinder barrel.

Preferably, the damping through-holes are linearly arranged at equal intervals and have a same diameter.

Preferably, the damping through-holes are linearly arranged at equal intervals and have different diameters that gradually increase from outside to inside.

Preferably, the damping through-holes are linearly arranged with distances between each two adjacent damping through-holes gradually increased from outside to inside, and the damping through-holes have a same diameter.

Preferably, the damping through-holes have a same diameter, and the damping through-holes are spirally arranged at equal intervals.

Preferably, a top end of the inner pipe is provided with a flared opening, an outer diameter of the flared opening is equal to an inner diameter of the outer pipe, and a length of the inner pipe is between <NUM>/<NUM> and <NUM>/<NUM> of a length of the outer pipe.

Preferably, a length of the sealing pipe is <NUM>/<NUM> of the length of the outer pipe, and the sealing pipe is fixed inside the piston rod.

Preferably, the damping valve comprises a damping valve body, a compression damping mechanism, a tensile damping mechanism and a lock nut, the compression damping mechanism and the tensile damping mechanism are fixed on either side of the damping valve body respectively, the compression damping mechanism comprises a compression valve plate set and a compression stopper, the tensile damping mechanism comprises a tensile valve plate set and a tensile stopper, and a guidance tape is fixed on an outside of the damping valve body.

Therefore, the adaptive damping shock absorber for automobile adopting the structure above described increases or decreases the damping according to the position variable, realizes the adaptive adjustment of the damping of the automobile under any road condition, and ensures that the change of the damping value is synchronous with the change of the road condition, so that the automobile runs more smoothly and comfortably.

The technical solution of the present disclosure is further described in detail by the accompanying drawings and embodiments.

Reference numerals: <NUM>. piston rod; <NUM>. lower lug; <NUM>. cylinder barrel; <NUM>. end cover; <NUM>. anti-collision damping ring; <NUM>. upper lug; <NUM>. damping valve; <NUM>. damping valve body; <NUM>. guidance tape; <NUM>. compression valve plate set; <NUM>. compression stopper; <NUM>. tensile valve plate set; <NUM>. tensile stopper; <NUM>. lock nut; <NUM>. sealing pipe; <NUM>. core tube seat; <NUM>. second check valve; <NUM>. outer tube; <NUM>. damping through-hole; <NUM>. first check valve; <NUM>. inner tube; <NUM>. flared opening; <NUM>. nitrogen tank; <NUM>. first oil tube pipeline; <NUM>. second oil tube pipeline.

<FIG> is a schematic structural diagram of an adaptive damping shock absorber for automobile, <FIG> is a schematic structural diagram of a flute-like assembly according to the present disclosure, <FIG> is a schematic partial structural diagram of an existing shock absorber, <FIG> is a diagram of an oil circuit during being compressed according to the present disclosure, and <FIG> is a diagram of an oil circuit during being tensioned according to the present disclosure. As shown in the drawings, the adaptive damping shock absorber for automobile includes a cylinder barrel <NUM>, a piston rod <NUM>, a damping valve <NUM> and a nitrogen tank <NUM>, and further includes a flute-like assembly arranged in the cylinder barrel <NUM>, the flute-like assembly includes a core pipe seat <NUM>, an inner pipe <NUM> and an outer pipe <NUM>, each of two ends of the outer pipe <NUM> are provided with at least one row of damping through-holes <NUM>, and in the present Embodiment <NUM>,the damping through-holes <NUM> are linearly arranged at equal intervals and have a same diameter. One of the two ends of the outer tube <NUM> is provided with a first check valve <NUM> and is inserted into the piston rod <NUM> so that oil can flow out from the inside of the outer tube <NUM> and cannot flow into the outer tube <NUM> from the outside to the inside. The other end of the two ends of the outer tube <NUM> is arranged on the core tube seat <NUM> and is connected with the nitrogen tank <NUM> via a first oil tube pipeline <NUM>, the core tube seat <NUM> is communicated with the first oil tube pipeline <NUM> via a second check valve <NUM>, the inner tube <NUM> is arranged in the outer tube <NUM>, the top end of the inner tube <NUM> is provided with a flared opening <NUM>, the length of the inner tube <NUM> is between <NUM>/<NUM> and <NUM>/<NUM> of the length of the outer tube <NUM>, the outer diameter of the flared opening <NUM> is equal to the inner diameter of the outer tube <NUM>, so that a first cavity is formed between one end, close to the core tube seat <NUM>, of the outer tube <NUM> and the inner tube <NUM>. The bottom end of the inner pipe <NUM> is fixed on the core tube seat <NUM> and is connected with the nitrogen tank <NUM> via a second oil tube pipeline <NUM>, and the core tube seat <NUM> is fixed to the bottom of the cylinder barrel <NUM>. The damping valve <NUM> is fixed to one end of the piston rod <NUM> and is arranged in the cylinder barrel <NUM>, one end of the piston rod <NUM> has a sealing pipe <NUM> fixed thereto, the length of the sealing pipe <NUM> is <NUM>/<NUM> of the length of the outer tube, and the sealing pipe <NUM> is fixed inside the piston rod <NUM>. The sealing pipe <NUM> is used for blocking the damping through-holes <NUM> on the outer tube <NUM> along with the movement of the piston rod <NUM>, and the damping valve <NUM> includes a damping valve body <NUM>, a compression damping mechanism, a tensile damping mechanism and a lock nut <NUM>, the compression damping mechanism and the tensile damping mechanism are fixed on either side of damping valve body <NUM> respectively, and the compression damping mechanism includes a compression valve plate set <NUM> and a compression stopper <NUM>, and the tensile damping mechanism includes a tensile valve plate set <NUM> and a tensile stopper <NUM>, and a guidance tape is fixed on the outside of the damping valve body <NUM>. During being compressed or tensioned, the compression valve plate set or the tensile valve plate set is deformed, so that the oil can pass through the damping valve body. The other end of the piston rod <NUM> passes through an end cover of the cylinder barrel <NUM> and is provided with a lower lug <NUM>, and an upper lug <NUM> is fixed to the bottom of the cylinder barrel <NUM>.

The compression process is as follows:
When the piston rod <NUM> moves inwards, the sealing pipe <NUM> blocks the damping through-holes <NUM> at the left end of the outer pipe <NUM>, the compression valve plate set is deformed, so that hydraulic oil flows from the right side to the left side of the damping valve, meanwhile, the hydraulic oil enters the first cavity through the damping through-holes at the right end and then enters the nitrogen tank via the first oil tube pipeline <NUM>, the hydraulic oil in the nitrogen tank enters the inner tube <NUM> via the second oil tube pipeline <NUM>, enters the piston rod <NUM> via the first check valve, flows through the damping valve and flows into the cylinder barrel <NUM> at the left side of the damping valve; along with the increase of the deformation, the sealing pipe <NUM> is far away from the damping through-holes on the left side, so that the hydraulic oil flows through the damping valve through the damping through-holes on the left side and enters the cylinder barrel <NUM> at the left side of the damping valve; when the sealing pipe <NUM> blocks the damping through-holes on the right side, along with the number of the damping through-holes on the right side reduces, the damping gradually increases. The damping is adaptively adjusted along with the change of the deformation.

The tensioning process is as follows:
When the piston rod <NUM> extends, the hydraulic oil in the nitrogen tank rapidly enters the right side of the damping valve <NUM> via the second check valve <NUM>, the tensile valve plate set is deformed at the same time, the left-side hydraulic oil enters the right side from the left side via the damping valve, so that the shock absorber reacts rapidly, and when an automobile is suspended, the shock absorber rapidly returns to the initial position. Along with the movement of the sealing pipe <NUM>, the damping through-hole on the left side is gradually covered and blocked, and the damping is gradually increased. The damping is adaptively adjusted along with the change of the deformation.

The difference between the Embodiment <NUM> and Embodiment <NUM> is that the damping through-holes are linearly arranged at equal intervals and have different diameters that gradually increase from outside to inside, as shown in <FIG>.

The difference between the Embodiment <NUM> and Embodiment <NUM> in that the damping through-holes are linearly arranged with distances between each two adjacent damping through-holes gradually increased from outside to inside, and the damping through-holes have a same diameter, as shown in <FIG>.

The difference between the Embodiment <NUM> and Embodiment <NUM> is that the damping through-holes have a same diameter, and the damping through-holes are arranged spirally at equal intervals, as shown in <FIG>.

Therefore, the adaptive damping shock absorber for automobile adopting the structure described above increases or reduces the damping according to the variable, realizes the adaptive adjustment of the damping of the automobile under any road condition, and ensures that the automobile runs more smoothly and comfortably.

Claim 1:
An adaptive damping shock absorber for automobile, comprising a cylinder barrel (<NUM>), a piston rod (<NUM>), a damping valve (<NUM>) and a nitrogen tank (<NUM>), characterized in that:
the adaptive damping shock absorber for automobile further comprises a flute-like assembly arranged in the cylinder barrel, the flute-like assembly comprises a core tube seat (<NUM>), an inner tube (<NUM>) and an outer tube (<NUM>), wherein each of two ends of the outer tube are provided with at least one row of damping holes (<NUM>),
one of the two ends of the outer tube is provided with a first check valve (<NUM>) and is inserted into the piston rod, another of the two ends of the outer tube is arranged on the core tube seat (<NUM>) and is connected with the nitrogen tank via a first oil tube pipeline (<NUM>),
the core tube seat is communicated with the first oil tube pipeline via a second check valve (<NUM>),
the inner tube is arranged in the outer tube, a bottom end of the inner tube is fixed on the core tube seat and is connected with the nitrogen tank via a second oil tube pipeline (<NUM>),
the core tube seat is fixed to a bottom of the cylinder barrel, the damping valve is fixed to one end of the piston rod and is arranged in the cylinder barrel, one end of the piston rod has a sealing pipe (<NUM>) fixed thereto, and another end of the piston rod passes through an end cover of the cylinder barrel and is provided with a lower lug (<NUM>), and an upper lug (<NUM>) is fixed to the bottom of the cylinder barrel.