Compact rigidity damping inerter self-control type hydro-pneumatic spring

Abstract

According to the compact rigidity damping inerter self-control type hydro-pneumatic spring, the bottom of the lower end of a plunger of a hollow structure is sealed and is downwards connected with a wheel, the plunger extends into an oil cylinder from bottom to top, the top of the upper end of the plunger is fixedly connected with a piston, and a row of plunger holes are formed in the upper portion of the plunger; the upper part of an upper cavity of the oil cylinder is sequentially connected with a damper and a small oil-gas chamber; the lower part of a lower cavity is sequentially connected with an inerter pipe, an adjustable throttle valve and a large oil-gas chamber; the upper end of the self-control device outer cylinder is fixedly connected with the piston; a self-control device inner barrel capable of moving up and down is coaxially sleeved in the self-control device outer barrel, the lower end of the self-control device inner barrel is sealed, and the upper section of the self-control device inner barrel is hinged to the oil cylinder upper end cover; an inner barrel upper row oil through hole formed in an inner barrel of the automatic control device is always located in an upper cavity of the oil cylinder, the upper edge of an inner barrel middle row oil through hole is aligned with the upper edge of an outer barrel upper row oil through hole, and the lower edge of an inner barrel lower row oil through hole is aligned with the lower edge of an outer barrel lower row oil through hole. The rigidity is changed, and the damping and the inerter can also be changed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile, and relates to the suspension spring of automobile, specifically a stiffness damping inertial mass self -control type oil gas spring for automobile suspension. BACKGROUND

[0002] Suspension is an important structure and function part of automobile, mainly when the automobile runs on bad road, the vibration transmitted to the vehicle body by the wheel is attenuated, and the passenger obtains good ride comfort. In order to provide good vehicle body low frequency and high frequency vibration suppression effect simultaneously, the document with patent application number CN2024112169851 and the name of "stiffness gradually increasing type three mass secondary damping grading control suspension and design and application" provides a kind of stiffness gradually increasing type spring with air spring as basic component, stiffness control valve is arranged between air bag and stiffness control air chamber, and the stiffness gradually increasing type spring is driven by suspension travel. When the absolute value of suspension dynamic travel is less than or equal to a particular preset threshold, the stiffness control valve is connected with the air bag and the stiffness control air chamber, and the stiffness gradually increasing type spring automatically provides small stiffness;When the absolute value of suspension dynamic travel is greater than or equal to a particular preset threshold, the stiffness control valve disconnects the air bag and the stiffness control air chamber, and the stiffness gradually increasing type spring automatically provides large stiffness. The stiffness gradually increasing type spring cooperates with the damper of output large damping, and good vehicle body low frequency vibration suppression effect can be obtained, the stiffness gradually increasing type spring cooperates with the damper of output small damping and the wheel power vibration absorber, and good vehicle body high frequency vibration suppression effect can be obtained, the stiffness gradually increasing type spring automatically provides large stiffness when suspension is far away from the equilibrium position, and the stability of vehicle body posture is automatically guaranteed. However, the problems are as follows: one is that inertia mass cannot be provided, resonance function cannot be generated together with small stiffness when suspension is in equilibrium position, optimal vehicle body high frequency vibration suppression effect cannot be obtained, and suspension dynamic travel cannot be more effectively constrained by damping;Second, the stiffness control valve used is large in size, many parts are needed, and is located outside air bag, so that the installation space of suspension is occupied. SUMMARY

[0003] The utility model aims at solving the problems of prior art and provides a compact stiffness damping inertial mass self -control type oil gas spring without occupying the installation space of suspension, small in size and optimal vehicle body high frequency vibration suppression effect.

[0004] In order to achieve the above object, the utility model discloses a compact stiffness damping inertance self-control type oil gas spring adopts the following technical scheme: including an oil cylinder, the upper end of oil cylinder is the upper end cover of oil cylinder and is connected with the body of car, the piston is divided into two chambers in the oil cylinder, still include the hollow structure's plunger, its lower end bottom seal and connect the wheel downward, from below to upward and enter into the oil cylinder, and the upper end top fixed connection piston, and in the upper position open a row of plunger hole, the upper chamber of oil cylinder upper portion is connected in the damper and small oil gas chamber in oil cylinder outside with first hydraulic oil pipe in proper order, the lower chamber of oil cylinder lower portion is connected in the inertance tube, adjustable flow valve and big oil gas chamber in oil cylinder outside with second hydraulic oil pipe in proper order, the self-control device outer tube is located in the plunger, and the upper end is fixedly connected with the piston, and the lower end is suspended in the plunger, in the self-control device outer tube, coaxial sleeve has a self-control device inner tube that can move up and down in the self-control device outer tube, the lower end of self-control device inner tube is sealed, and the lower section is located in the self-control device outer tube, and the upper section passes through the piston and is hinged with the upper end cover of oil cylinder after going up, the self-control device inner tube is opened and has the upper row of through oil hole of inner tube, the middle row of through oil hole of inner tube and the lower row of through oil hole of inner tube, the upper row of through oil hole of inner tube is always located in the upper chamber of oil cylinder, the self-control device outer tube is opened and has the upper row of through oil hole of outer tube and the lower row of through oil hole of outer tube, the upper edge of the middle row of through oil hole of inner tube is aligned with the upper edge of the upper row of through oil hole of outer tube, and the lower edge of the lower row of through oil hole of inner tube is aligned with the lower edge of the lower row of through oil hole of outer tube.

[0005] The utility model has the beneficial effects after adopting the above technical scheme:

[0006] The utility model compares with the stiffness control valve of the document of stiffness increasing type spring of patent application number CN2024112169851 mainly has the following differences: 1) the double cylinder type stiffness self-control device that adopts is to adopt the inner and outer tube structure, and not to adopt the outer valve body and inner rod body structure, so need not to connect the through oil pipe additionally, 2) three rows and two rows of through oil holes are equipped on the inner and outer tube of the double cylinder type stiffness self-control device respectively, and not like stiffness control valve that is equipped with three holes and a groove on the valve body and is equipped with two grooves on the valve core, can see, the utility model can improve the through oil efficiency, 3) the inner and outer tube of the double cylinder type stiffness self-control device is not like stiffness control valve that wants to set up spring and other reset device between the valve body and valve core, therefore simple structure and less parts, 4) the double cylinder type stiffness self-control device is located in the plunger, so need not to set up sealing device like the valve body and valve core that are arranged outside, 5) the utility model can change damping and inertance in addition to changing stiffness, has better performance promotion ability, 6) the double cylinder type stiffness control device structure is simpler, and is located in the plunger, will not additionally occupy the suspension mounting space. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 It is the structure schematic diagram of the utility model discloses a compact stiffness damping inertance self-control type oil gas spring;

[0008] Figure: 1. oil cylinder; 1-1. oil cylinder upper end cover; 2. piston; 3. plunger; 3-1. plunger hole; 4. self-control device outer cylinder; 4-1. outer cylinder upper row of oil holes; 4-2. outer cylinder lower row of oil holes; 5. inerter tube; 6. adjustable flow valve; 7. large oil gas chamber; 8. small oil gas chamber; 9. damper; 10. self-control device inner cylinder; 10-1. inner cylinder lower row of oil holes; 10-2. inner cylinder middle row of oil holes; 10-3. inner cylinder lower row of oil holes; 11. ball hinge. DETAILED DESCRIPTION

[0009] Reference Figure 1 The utility model discloses a compact stiffness damping inerter self-control type oil gas spring is by oil cylinder 1, piston 2, plunger 3, double-barreled stiffness damping self-control device, inerter tube 5, adjustable flow valve 6, large oil gas chamber 7, small oil gas chamber 8, damper 9, ball hinge 11 are formed. Double-barreled stiffness damping self-control device is by self-control device outer cylinder 4 and self-control device inner cylinder 10 are formed.

[0010] Oil cylinder 1 is located above plunger 3, and the upper end of oil cylinder 1 is oil cylinder upper end cover 1-1, and oil cylinder 1 is connected with the vehicle body through oil cylinder upper end cover 1-1 upwards, and plunger 3 is a hollow structure, is sealed at the bottom, and is provided with a row of plunger holes 3-1 at the upper position, the row of plunger holes 3-1 is a plurality of holes opened at the same height position along the circumferential direction of the side wall of plunger 3, under the condition of ensuring strength, the greater the sum of the hole areas of the row of plunger holes 3-1, plunger 3 extends into oil cylinder 1 from bottom to top, piston 2 is inside oil cylinder 1, and oil cylinder 1 is divided into two chambers, piston 2 can move up and down along the inner wall of oil cylinder 1, the lower end of plunger 3 is connected to the vehicle wheel downwards, and the upper end of plunger 3 is fixedly connected with piston 2, and moves synchronously with plunger 3. The upper chamber of oil cylinder 1 is connected with damper 9 and small oil gas chamber 8 outside oil cylinder 1 in sequence through first hydraulic oil pipe, and the lower chamber of oil cylinder 1 is connected with inerter tube 5, adjustable flow valve 6 and large oil gas chamber 7 outside oil cylinder 1 in sequence through second hydraulic oil pipe. The volume of large oil gas chamber 7 is greater than that of small oil gas chamber 8.

[0011] The double-cylinder damping type stiffness self-control device is arranged inside the oil cylinder 1 and the plunger 3, wherein the self-control device outer cylinder 4 is entirely located in the plunger 3, the upper end of the self-control device outer cylinder 4 is fixedly connected to the plunger piston 2 in an upward manner, and the lower end of the self-control device outer cylinder 4 is suspended in the plunger 3. A self-control device inner cylinder 10 is coaxially sleeved in the self-control device outer cylinder 2, the lower section of the self-control device inner cylinder 10 is located in the self-control device outer cylinder 4, and the self-control device inner cylinder 10 can move up and down in the self-control device outer cylinder 4 in an axial direction. The upper section of the self-control device inner cylinder 10 extends in the upper chamber of the oil cylinder 1 after passing through the piston 2 in an upward manner, and the upper end of the self-control device inner cylinder 10 is hinged to the oil cylinder upper end cover 1-1. The upper end of the self-control device inner cylinder 10 is connected to the oil cylinder upper end cover 1-1 in an upward manner by using a spherical hinge 11. The lower end of the self-control device inner cylinder 10 needs to be sealed and can extend below the self-control device outer cylinder 4. Three rows of oil passage holes are formed in the self-control device inner cylinder 10 at different heights from top to bottom, and the sum of the hole areas of one row of holes at the same height is larger, under the condition of ensuring the strength.

[0012] The three rows of oil passage holes in the self-control device inner cylinder 10 are an inner cylinder upper row of oil passage holes 10-1, an inner cylinder middle row of oil passage holes 10-2 and an inner cylinder lower row of oil passage holes 10-3, wherein the inner cylinder upper row of oil passage holes 10-1 is always located in the upper chamber of the oil cylinder 1, and the inner cylinder middle row of oil passage holes 10-2 and the inner cylinder lower row of oil passage holes 10-3 are long strip-shaped holes in the height direction, and the long side of the long strip-shaped hole is arranged along the height direction. The sum of the hole areas of one row of holes at the same height in the self-control device inner cylinder 10 is larger, under the condition of ensuring the strength.

[0013] Two rows of oil passage holes are formed in the self-control device outer cylinder 4, which are an outer cylinder upper row of oil passage holes 4-1 and an outer cylinder lower row of oil passage holes 4-2, and the sum of the hole areas of one row of holes at the same height is larger, under the condition of ensuring the strength. The upper edge of the inner cylinder middle row of oil passage holes 10-2 is aligned with the upper edge of the outer cylinder upper row of oil passage holes 4-1, and the lower edge of the inner cylinder lower row of oil passage holes 10-3 is aligned with the lower edge of the outer cylinder lower row of oil passage holes 4-2. The one row of oil passage holes in the utility model refers to a plurality of holes formed at the same height in the side wall of the outer cylinder or the inner cylinder in a circumferential direction.

[0014] When the vehicle body moves upward away from the wheel, the inner cylinder 10 of the self-control device is driven upward relative to the outer cylinder 4 fixed on the piston 2 through the upper end cover 1-1 of the oil cylinder and the ball hinge 11, at this time, the volume of the upper chamber of the oil cylinder 1 increases, when the lower edge of the middle discharge oil hole 10-2 of the inner cylinder is not higher than the upper edge of the upper discharge oil hole 4-1 of the outer cylinder, most of the hydraulic oil filling the increased volume of the upper chamber of the oil cylinder 1 flows from the large oil chamber 7 to the lower chamber of the oil cylinder 1 through the adjustable flow valve 6 and the inertial tube 5, then flows into the hollow chamber of the plunger 3 through the plunger hole 3-1, and then flows into the upper chamber of the oil cylinder 1 through the upper discharge oil hole 10-1 of the inner cylinder, the inner cylinder 10, the middle discharge oil hole 10-2 of the inner cylinder, the upper discharge oil hole 4-1 of the outer cylinder 4, and a small part of the hydraulic oil flows into the oil cylinder 1 through the damper 9 at this time, the main work of the large oil chamber 7 provides small stiffness, the adjustable flow valve 6 and the inertial tube 5 work to provide small damping and small inertia respectively. Conversely, when the lower edge of the middle discharge oil hole 10-2 of the inner cylinder is higher than the upper edge of the upper discharge oil hole 4-1 of the outer cylinder, there is no hydraulic oil flow between the outer cylinder 4 and the inner cylinder 10, all the hydraulic oil filling the increased volume of the upper chamber of the oil cylinder 1 flows from the small oil chamber 7 to the upper chamber of the oil cylinder 1 through the damper 9, the main work of the small oil chamber 8 provides large stiffness, and the damper 9 provides large damping.

[0015] When the vehicle body moves downward close to the wheel, the inner cylinder 10 of the self-control device is driven downward relative to the outer cylinder 4 fixed on the piston 2 through the upper end cover 1-1 of the oil cylinder and the ball hinge 11, at this time, the volume of the upper chamber of the oil cylinder 1 decreases, when the upper edge of the lower discharge oil hole 10-3 of the inner cylinder is not lower than the lower edge of the lower discharge oil hole 4-2 of the outer cylinder, most of the hydraulic oil flowing out of the upper chamber of the oil cylinder 1 flows from the upper chamber of the oil cylinder 1 through the upper discharge oil hole 10-1 of the inner cylinder, the inner cylinder 10, the lower discharge oil hole 10-3 of the inner cylinder, the downward discharge oil hole 4-2 of the outer cylinder 4, and then flows into the hollow chamber of the plunger 3, and then flows into the lower chamber of the oil cylinder 1 through the plunger hole 3-1, and then flows through the large oil chamber 7 through the adjustable flow valve 6 and the inertial tube 5, and a small part of the hydraulic oil flows from the upper chamber of the oil cylinder 1 through the damper 9 into the small oil chamber 8, the main work of the large oil chamber 7 provides small stiffness, the adjustable flow valve 6 and the inertial tube 5 work to provide small damping and small inertia respectively. When the lower edge of the lower discharge oil hole 10-3 of the inner cylinder is lower than the lower edge of the lower discharge oil hole 4-2 of the outer cylinder, there is no hydraulic oil flow between the outer cylinder 4 and the inner cylinder 10, all the hydraulic oil flowing out of the upper chamber of the oil cylinder 1 flows into the small oil chamber 8 through the damper 9, the main work of the small oil chamber 8 provides large stiffness, and the damper 9 provides large damping.

[0016] The size (i.e. hole length) of the middle oil passage 10-2 and the lower oil passage 10-3 in the inner cylinder in height is equal to the threshold of the suspension travel for improving the ride comfort of the automobile, and the distance between the upper edges of the middle oil passage 10-2 and the lower oil passage 10-3 is slightly greater than the suspension limiting travel.

[0017] When the suspension travel is not more than the threshold of the suspension travel for improving the ride comfort of the automobile, the oil gas spring provided by the utility model mainly works by the large oil chamber 7 to provide small stiffness, the adjustable flow valve 6 to provide small damping, and the inerter tube 5 to provide small inerter, and the small stiffness and the small inerter together generate high-frequency anti-resonance damping, and the small stiffness together with the small inerter greatly reduces the high-frequency vibration of the vehicle body, so that the automobile has good ride comfort.

[0018] The hydraulic oil flow between the oil cylinder 1 and the plunger 3 of the oil gas spring is controlled by the suspension dynamic travel driven double-cylinder damping type stiffness self-control device, and when the suspension dynamic travel is greater than or less than the threshold of the suspension travel for improving the ride comfort of the automobile, the stiffness, damping and inerter output are automatically changed, and a sensor and a controller are not needed, so the oil gas spring provided by the utility model is named as a stiffness damping inerter self-control type oil gas spring.

Claims

1. A compact stiffness-damping inertia-capacitance self-controlled hydropneumatic spring, comprising a cylinder (1), the upper end of the cylinder (1) being a cylinder upper end cap (1-1) connected to the vehicle body, and a piston (2) dividing the cylinder (1) into upper and lower chambers within the cylinder (1), characterized in that: It also includes a hollow plunger (3), the bottom of which is sealed and connected to the wheel downwards, extending upwards into the cylinder (1), and the top of which is fixedly connected to the piston (2), and a row of plunger holes (3-1) is opened at the top; the upper chamber of the cylinder (1) is connected in sequence to the damper (9) and the small oil and gas chamber (8) outside the cylinder (1) by the first hydraulic oil pipe, and the lower chamber of the cylinder (1) is connected in sequence to the inertial flow pipe (5), the adjustable flow valve (6) and the large oil and gas chamber (7) outside the cylinder (1) by the second hydraulic oil pipe; The outer cylinder (4) of the automatic control device is entirely located inside the plunger (3), with the upper end fixedly connected to the piston (2) and the lower end suspended in the plunger (3); an inner cylinder (10) of the automatic control device is coaxially fitted in the outer cylinder (4) of the automatic control device, which can move up and down in the outer cylinder (4) of the automatic control device. The lower end of the inner cylinder (10) of the automatic control device is sealed, the lower section is located in the outer cylinder (4) of the automatic control device, and the upper section passes through the piston (2) upward and is hinged to the upper end cover (1-1) of the oil cylinder; The inner cylinder (10) of the automatic control device has an upper oil passage hole (10-1), a middle oil passage hole (10-2) and a lower oil passage hole (10-3). The upper oil passage hole (10-1) is always located in the upper chamber of the oil cylinder (1). The outer cylinder (4) of the automatic control device has an upper oil passage hole (4-1) and a lower oil passage hole (4-2). The upper edge of the middle oil passage hole (10-2) is aligned with the upper edge of the upper oil passage hole (4-1) of the outer cylinder, and the lower edge of the lower oil passage hole (10-3) is aligned with the lower edge of the lower oil passage hole (4-2) of the outer cylinder.

2. The compact stiffness-damping inertia-capacitance self-controlled hydro-gas spring according to claim 1, characterized in that: The oil drain hole (10-2) in the inner cylinder and the oil drain hole (10-3) in the lower part of the inner cylinder are elongated holes, with the long side of the elongated holes arranged along the height direction.

3. A compact stiffness-damping inertia-capacitance self-controlled hydro-gas spring according to claim 1, characterized in that: The upper section of the inner cylinder (10) of the automatic control device is hinged to the upper end cover (1-1) of the oil cylinder by ball joint (11).

4. A compact stiffness-damping inertia-capacitance self-controlled hydro-gas spring according to claim 1, characterized in that: The lower end of the inner cylinder (10) of the automatic control device extends below the outer cylinder (4) of the automatic control device.

5. A compact stiffness-damping inertia-capacitance self-controlled hydro-gas spring according to claim 1, characterized in that: Under the condition of ensuring strength, the larger the sum of the hole areas of a row of plunger holes (3-1) on the plunger (3), the better.

6. A compact stiffness-damping inertia-capacitance self-controlled hydro-gas spring according to claim 1, characterized in that: Under the condition of ensuring strength, the larger the sum of the hole areas of a row of holes at the same height of the inner cylinder (10) and outer cylinder (4) of the automatic control device, the better.

7. A compact stiffness-damping inertia-capacitance self-controlled hydro-gas spring according to claim 2, characterized in that: The length of the oil drain hole (10-2) in the inner cylinder and the oil drain hole (10-3) in the lower cylinder of the automatic control device is equal to the threshold of suspension travel for improving vehicle ride comfort.

8. A compact stiffness-damping inertia-capacitance self-controlled hydro-gas spring according to claim 1, characterized in that: The distance between the upper edge of the oil drain hole (10-2) in the inner cylinder and the upper edge of the lower oil drain hole (10-3) in the inner cylinder is greater than the suspension limit travel.

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