阅读说明：本技术 一种具有自冷却功能的复合油气弹簧装置 (Composite hydro-pneumatic spring device with self-cooling function ) 是由 刘秀钰 刘志浩 高钦和 邓刚锋 程洪杰 管文良 候帅 于 2021-01-27 设计创作，主要内容包括：本发明公开了一种具有自冷却功能的复合油气弹簧装置,包括油气弹簧本体、运动转换机构和冷却机构,运动转换机构设置在油气弹簧本体上端,冷却机构设置在油气弹簧本体的内部；使用时,通过利用滚珠丝杠带动外负载的形式提供附加阻尼耗散一部分振动能量,并将此能量转换为压缩机做功,驱动冷却系统工作,使用制冷剂在油气弹簧内部强制吸热,在油气弹簧外部强制放热；同时在系统运行时,压缩机做功可随油气弹簧振动发热的速率自适应变化,在提高能量利用效率的同时,有效提高油气弹簧的散热效率,具有利用率高和散热效率高的特点。(The invention discloses a composite hydro-pneumatic spring device with a self-cooling function, which comprises a hydro-pneumatic spring body, a motion conversion mechanism and a cooling mechanism, wherein the motion conversion mechanism is arranged at the upper end of the hydro-pneumatic spring body; when the cooling system is used, additional damping is provided in a mode that the ball screw drives an external load to dissipate part of vibration energy, the energy is converted into work of the compressor to drive the cooling system to work, a refrigerant is used for forcibly absorbing heat in the hydro-pneumatic spring, and heat is forcibly released outside the hydro-pneumatic spring; meanwhile, when the system operates, the work of the compressor can be changed along with the self-adaption of the vibration heating rate of the hydro-pneumatic spring, the heat dissipation efficiency of the hydro-pneumatic spring is effectively improved while the energy utilization efficiency is improved, and the system has the characteristics of high utilization rate and high heat dissipation efficiency.)

1. The utility model provides a compound hydro-pneumatic spring device with from cooling function which characterized in that: the hydro-pneumatic spring comprises a hydro-pneumatic spring body, a motion conversion mechanism and a cooling mechanism, wherein the motion conversion mechanism is arranged inside and at the upper end of the hydro-pneumatic spring body;

the hydro-pneumatic spring body comprises an outer cylinder body (7), a piston rod (10), an energy accumulator (28), an upper cylinder body (2), an upper lifting lug (1) and a lower lifting lug (15), wherein the upper cylinder body (2) is connected with the outer cylinder body (7), and the upper lifting lug (1) is arranged on the upper cylinder body (2); the piston rod (10) is movably arranged in the outer cylinder body (7), the interior of the piston rod (10) is of a hollow structure, the lower lifting lug (15) is arranged on the piston rod (10), the energy accumulator (28) is communicated with the inner cavity of the outer cylinder body (7) through an air pipe (23), and is respectively connected with a wheel and a suspension through the upper lifting lug (1) and the lower lifting lug (15);

the motion conversion mechanism comprises a driving assembly, a conversion assembly and an output shaft (4), the driving assembly is arranged in a piston rod (10), the conversion assembly is arranged in an upper cylinder body (2), the conversion assembly is driven to move through the driving assembly, the conversion assembly drives the output shaft (4) to move, a cooling mechanism is driven to do work, heat exchange between the inside of the hydro-pneumatic spring and the external environment is achieved, and the composite hydro-pneumatic spring is cooled.

2. A compound hydro-pneumatic spring device with self cooling function as defined in claim 1 wherein: the piston rod (10) in be provided with nested annular cylinder body (17) and inside annular cylinder body (21) of connecting, wherein annular cylinder body (17) welding is on first base (16), first base (16) set up inside piston rod (10), inside annular cylinder body (21) welding is on second base (22), second base (22) pass through the bolt and be connected with the last bottom surface of outer cylinder body (7), and adopt the static seal mode to seal between second base (22) and the outer cylinder body (7), form no fluid cavity in the inner cylinder body.

3. A compound hydro-pneumatic spring device with self cooling function as defined in claim 2 wherein: the driving assembly comprises a ball screw (12), a ball screw nut pair (19), a nut pair supporting seat (14), a double-thrust ball bearing (24) and a bearing seat (25), the nut pair supporting seat (14) is welded on the first bottom plate (16), and the ball screw nut pair (19) is fixedly embedded in the nut pair supporting seat (14) and fixed through a bolt; the upper end screw part of the ball screw (12) is sleeved in the ball screw nut pair (19), the lower end stepped shaft part penetrates through the double-thrust ball bearing (24), the ball screw (12) is positioned by adopting a shaft shoulder in the axial direction, the double-thrust ball bearing (24) is sleeved in the bearing seat (25), and the bearing seat (25) is fixedly connected with the outer cylinder barrel (7) through a bolt; and the tail end of the ball screw (12) extends out of the bearing seat (25), and the extending section of the ball screw is connected with the conversion component.

4. A compound hydro-pneumatic spring device with self cooling function as defined in claim 3 wherein: the conversion assembly comprises a first one-way bearing (27), a second one-way bearing (30), a first bevel gear (26), a second bevel gear (29), a driven bevel gear (3) and a bearing sealing end cover (6), wherein the rotation directions of the first one-way bearing (27) and the second one-way bearing (30) are opposite, the first one-way bearing (27) and the second one-way bearing (30) are sequentially sleeved on the extension section of the ball screw (12), the first one-way bearing (27) is provided with the first bevel gear (26), and the second one-way bearing (30) is provided with the second bevel gear (29); the small bevel gear (31) is arranged between the first bevel gear (26) and the second bevel gear (29), and the outer end of the output shaft (4) penetrates through the small bevel gear (31) and is fixedly connected with the small bevel gear (31); the output shaft (4) is further provided with an angular contact bearing (3), the outer ring of the angular contact bearing (3) is fixed on the upper cylinder body (2), and the outer side of the outer ring is hermetically connected with the upper cylinder body (2) through an embedded bearing cover (6).

5. A compound hydro-pneumatic spring device with self cooling function as defined in claim 1 wherein: the outer cylinder body (7) is further provided with a cooling liquid inlet (71) and a cooling liquid outlet (72), the cooling liquid inlet (71) is connected with the first cooling hose (9), and the cooling liquid outlet (72) is connected with the second cooling hose (34).

6. The hybrid hydro-pneumatic spring device with self-cooling function as defined in claim 5, wherein: cooling body include compressor (5), expansion valve (8), evaporimeter (13), condenser (20) and connecting line (32), the input shaft of compressor (5) is output shaft (4), the refrigerant output and the connecting line (32) of compressor (5) are connected, the other end and the condenser (20) of connecting line (32) are connected, condenser (20) are connected with expansion valve (8) through the pipeline, expansion valve (8) are connected with first cooling hose (9), first cooling hose (9) are connected with the head end of evaporimeter (13), the end and the second cooling hose (34) of evaporimeter (13) are connected, second cooling hose (34) are connected with outside pipeline (33), gaseous state refrigerant inhales compressor (5) through outside pipeline (33).

7. The hybrid hydro-pneumatic spring device with self-cooling function as defined in claim 6, wherein: a speed increaser is arranged between the compressor (5) and the output shaft (4).

8. The hybrid hydro-pneumatic spring device with self-cooling function as defined in claim 6, wherein: the condenser (20) and the evaporator (13) are in serpentine structures outside and inside the hydro-pneumatic spring.

9. A self-cooling compound hydro-pneumatic spring device as defined in any one of claims 1 to 8, wherein: the piston rod (10) is also provided with a damping hole (18) and a one-way valve (11).

Technical Field

The invention relates to the technical field of automobile shock absorbers, in particular to a composite hydro-pneumatic spring device with a self-cooling function.

Background

When the automobile runs on an uneven road surface, the automobile body can vibrate due to the excitation of the road surface, so that the smoothness and the operation stability of the automobile are reduced; in order to solve the problem, a shock absorber is arranged between the wheel and the automobile body, and the vibration energy of the automobile is dissipated through the shock absorber; for medium and small load vehicles, the shock absorber can be formed by a spring and a ball screw, the spring provides enough rigidity for a suspension, the ball screw drives an external load or a generator to provide damping for the shock absorber, but for heavy load vehicles, a common spring is difficult to provide enough rigidity for the suspension, so the shock absorber of the heavy load vehicle generally adopts an oil-gas spring form, a damping hole is arranged in the oil-gas spring, the vibration energy of the vehicle is converted into heat energy in oil liquid of the shock absorber by utilizing the principle of orifice throttling, and finally the generated heat is dissipated through heat exchange between an outer cylinder barrel of the shock absorber and the external environment;

this way of converting system vibrations into heat dissipation mainly suffers from the following disadvantages: 1. the vibration energy of the hydro-pneumatic spring suspension is completely converted into a heat energy form and is finally dissipated through heat exchange, so that the energy waste is serious; 2. the heat is accumulated in the shock absorber due to the slow heat dissipation speed, so that the temperature of hydraulic oil is increased, the viscosity of the hydraulic oil is reduced finally, the damping characteristic of the shock absorber is influenced, the shock absorption effect of the shock absorber is reduced, and even the sealing element of the shock absorber is aged and failed to cause the fault of the shock absorber;

the currently used hydro-pneumatic spring suspension mainly dissipates the vibration energy generated by the excitation of the road surface through a damping hole arranged on a piston, and the kinetic energy of hydraulic oil is converted into heat energy by the damping hole by using the principle of orifice throttling, so that the mode can increase the generation of heat in the hydro-pneumatic spring; the cooling of hydro-pneumatic spring generally adopts the air cooling or water cooling mode: (1) the air duct of the hydro-pneumatic spring is reasonably designed, so that the heat dissipation efficiency is increased, or an external fan is adopted to increase the air quantity, so that the heat dissipation efficiency is increased; (2) the water pump is arranged, and the heat dissipation efficiency of the hydro-pneumatic spring is enhanced in a water cooling mode; to above-mentioned mode (1), the heat dissipation demand is difficult to satisfy to the air-cooled mode when hydro-pneumatic spring vibrates at a high speed, inevitably makes the heat accumulation in the shock absorber, and to mode (2) admittedly can improve the radiating efficiency, but owing to adopt exogenous water pump drive, inevitably increased the power consumption of cooling system, can not be fine accords with current requirement to energy-concerving and environment-protective.

Disclosure of Invention

Aiming at the existing problems, the invention aims to provide a composite hydro-pneumatic spring device with a self-cooling function, the device integrates a ball screw in a hydro-pneumatic spring to form a composite suspension, an additional damping is provided in a mode of driving an external load by the ball screw to dissipate part of vibration energy, the energy is converted into a compressor to do work to drive a cooling system to work, a refrigerant is used for forcibly absorbing heat in the hydro-pneumatic spring, and the refrigerant is used for forcibly releasing heat outside the hydro-pneumatic spring; meanwhile, when the system operates, the work of the compressor can be changed along with the self-adaption of the vibration heating rate of the hydro-pneumatic spring, the heat dissipation efficiency of the hydro-pneumatic spring is effectively improved while the energy utilization efficiency is improved, and the system has the characteristics of high utilization rate and high heat dissipation efficiency.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a composite hydro-pneumatic spring device with a self-cooling function comprises a hydro-pneumatic spring body, a motion conversion mechanism and a cooling mechanism, wherein the motion conversion mechanism is arranged inside and at the upper end of the hydro-pneumatic spring body, and the cooling mechanism is arranged inside and outside the hydro-pneumatic spring body;

the hydro-pneumatic spring body comprises an outer cylinder body, a piston rod, an energy accumulator, an upper cylinder body, an upper lifting lug and a lower lifting lug, wherein the upper cylinder body is connected with the outer cylinder body, and the upper lifting lug is arranged on the upper cylinder body; the piston rod is movably arranged in the outer cylinder body, the interior of the piston rod is of a hollow structure, the lower lifting lug is arranged on the piston rod, the energy accumulator is communicated with the inner cavity of the outer cylinder body through an air pipe, and the energy accumulator is respectively connected with the wheel and the suspension through the upper lifting lug and the lower lifting lug;

the motion conversion mechanism comprises a driving assembly, a conversion assembly and an output shaft, the driving assembly is arranged in the piston rod, the conversion assembly is arranged in the upper cylinder body and drives the conversion assembly to move through the driving assembly, the conversion assembly drives the output shaft to move and drives the cooling mechanism to do work, heat exchange between the interior of the hydro-pneumatic spring and the external environment is achieved, and the composite hydro-pneumatic spring is cooled.

Preferably, the piston rod is internally provided with an annular cylinder body and an internal annular cylinder body which are connected in a nested manner, the annular cylinder body is welded on a first base, the first base is arranged inside the piston rod, the internal annular cylinder body is welded on a second base, the second base is connected with the upper bottom surface of the external cylinder body through a bolt, the second base and the external cylinder body are sealed in a static sealing manner, and a non-oil cavity is formed in the internal cylinder body.

Preferably, the driving assembly comprises a ball screw, a ball screw nut pair, a nut pair supporting seat, a double-thrust ball bearing and a bearing seat, the nut pair supporting seat is welded on the first bottom plate, and the ball screw nut pair is fixedly embedded in the nut pair supporting seat and is fixed through a bolt; the upper end screw part of the ball screw is sleeved in the ball screw nut pair, the lower end stepped shaft part penetrates through the double-thrust ball bearing, the ball screw is positioned by adopting a shaft shoulder in the axial direction, the double-thrust ball bearing is sleeved in the bearing seat, and the bearing seat is fixedly connected with the outer cylinder barrel through a bolt; and the tail end of the ball screw extends out of the bearing seat, and the extending section of the ball screw is connected with the conversion assembly.

Preferably, the conversion assembly comprises a first one-way bearing, a second one-way bearing, a first bevel gear, a second bevel gear, a driven bevel gear and a bearing sealing end cover, wherein the rotation directions of the first one-way bearing and the second one-way bearing are opposite, the first one-way bearing and the second one-way bearing are sequentially sleeved on the extending section of the ball screw, the first one-way bearing is provided with the first bevel gear, and the second one-way bearing is provided with the second bevel gear; the small bevel gear is arranged between the first bevel gear and the second bevel gear, and the outer end of the output shaft penetrates through the small bevel gear and is fixedly connected with the small bevel gear; an angular contact bearing is further arranged on the output shaft, an outer ring of the angular contact bearing is fixed on the upper cylinder body, and the outer side of the outer ring is connected with the upper cylinder body in a sealing mode through an embedded bearing cover.

Preferably, the outer cylinder body is further provided with a cooling liquid inlet and a cooling liquid outlet, the cooling liquid inlet is connected with the first cooling hose, and the cooling liquid outlet is connected with the second cooling hose.

Preferably, the cooling mechanism include compressor, expansion valve, evaporimeter, condenser and connecting line, the input shaft of compressor is the output shaft, and the refrigerant output end and the connecting line of compressor are connected, and the other end and the condenser of connecting line are connected, and the condenser passes through the pipeline and is connected with the expansion valve, and the expansion valve is connected with first cooling hose, and first cooling hose is connected with the head end of evaporimeter, and the end and the second cooling hose of evaporimeter are connected, and second cooling hose is connected with external pipeline, and gaseous state refrigerant inhales the compressor through external pipeline.

Preferably, a speed increaser is arranged between the compressor and the output shaft.

Preferably, the condenser and the evaporator both adopt a serpentine structure outside and inside the oil-gas spring.

Preferably, the piston rod is further provided with a damping hole and a one-way valve.

The invention has the beneficial effects that: the invention discloses a composite hydro-pneumatic spring device with a self-cooling function, which is improved in that:

the invention designs a composite hydro-pneumatic spring device with a self-cooling function, which comprises a hydro-pneumatic spring body, a motion conversion mechanism and a cooling mechanism, wherein when the device is used, the cooling system is arranged in the hydro-pneumatic spring, so that the oil temperature in the hydro-pneumatic spring is reduced, and the viscosity and the density of oil are controlled, so that the large-range change of the damping of the hydro-pneumatic spring caused by the severe rise of the oil temperature is controlled, the vibration damping effect of a vibration damper is effectively improved, and meanwhile, the aging and failure of a sealing element caused by the severe rise of the oil temperature are; meanwhile, the vibration energy of a part of hydro-pneumatic springs is converted into the dynamic energy of the compressor through the composite hydro-pneumatic spring suspension, so that additional damping force is provided for the shock absorber, the heat productivity of the shock absorber is reduced, meanwhile, the compressor drives the cooling system to work, the efficiency of the cooling system is improved, meanwhile, the modern energy-saving and environment-friendly requirements are met, and the composite hydro-pneumatic spring suspension has the advantages of high utilization rate and high heat dissipation efficiency.

Drawings

FIG. 1 is a front view of the composite hydro-pneumatic spring device with self-cooling function of the present invention

FIG. 2 is a cross-sectional view of the hybrid hydro-pneumatic spring assembly of the present invention having a self-cooling function.

Fig. 3 is a schematic structural diagram of the composite hydro-pneumatic spring device with a self-cooling function according to the present invention.

Fig. 4 is a partial enlarged view of the composite hydro-pneumatic spring device a with a self-cooling function according to the present invention.

Wherein: 1. an upper lifting lug, 2, an upper cylinder body, 3, an angular contact bearing, 4, an output shaft, 5, a compressor, 6, a bearing sealing end cover, 7, an outer cylinder body, 71, a cooling liquid inlet, 72, a cooling liquid outlet, 8, an expansion valve, 9, a first cooling hose, 10, a piston rod, 11, a one-way valve, 12, a ball screw, 13, an evaporator, 14, a nut pair supporting seat, 15, a lower lifting lug, 16, a first base, 17, an annular cylinder body, 18, an expansion valve, 19, a ball screw nut pair, 20, a condenser, 21, an inner annular cylinder body, 22, a second base, 23, an air pipe, 24, a double-thrust ball bearing, 25, a bearing seat, 26, a first bevel gear, 27, a first one-way bearing, 28, an accumulator, 29, a second bevel gear, 30, a second one-way bearing, 31, a small bevel gear, 32, a connecting pipeline, 33, an external pipeline, 34, a second cooling hose, 35. a first retainer, 36, a second retainer.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following further describes the technical solution of the present invention with reference to the drawings and the embodiments.

Referring to fig. 1 to 4, a composite hydro-pneumatic spring device with a self-cooling function includes a hydro-pneumatic spring body, a motion converting mechanism and a cooling mechanism, wherein the motion converting mechanism is disposed inside and at the upper end of the hydro-pneumatic spring body, and the cooling mechanism is disposed inside and outside the hydro-pneumatic spring body; the upper and lower both ends of hydro-pneumatic spring body are provided with lug 1 and lower lug 15 respectively, are connected respectively with wheel and suspension through last lug 1 and lower lug 15, and when the car receives the excitation of uneven road surface and vibrates, the hydro-pneumatic spring body has two kinds of operating modes: and stretching or compressing, wherein the reciprocating stroke of the hydro-pneumatic spring body during working drives the motion conversion mechanism to move, so that the motion conversion mechanism drives the cooling mechanism to do work, the heat exchange between the inside of the hydro-pneumatic spring and the external environment is realized, and the composite hydro-pneumatic spring is cooled.

The hydro-pneumatic spring body comprises an outer cylinder body 7, a piston rod 10, an energy accumulator 28, an upper cylinder body 2, an annular cylinder body 17 and an inner annular cylinder body 21, wherein the upper cylinder body 2 is fixedly connected with the outer cylinder body 7 through a bolt, and an upper lifting lug 1 is welded on the upper cylinder body 2; the piston rod 10 is movably arranged in the outer cylinder body 7 and moves up and down along an inner cavity of the outer cylinder body 7 during working, the interior of the piston rod 10 is of a hollow structure, and the lower lifting lug 15 is welded on the piston rod 10; the annular cylinder body 17 and the inner annular cylinder body 21 are both arranged in the inner cavity of the piston rod 10, the annular cylinder body 17 is nested inside the inner annular cylinder body 21, the annular cylinder body 17 and the inner annular cylinder body 21 are sealed in a dynamic sealing mode, the energy accumulator 28 is communicated with an inner cavity (rear cavity) of the outer cylinder body 7 through an air pipe 23, and the energy accumulator 28 is used for providing a variable stiffness characteristic for a suspension; the annular cylinder body 17 is welded on the first base 16, and the first base 16 is fixedly connected to the lower end of the interior of the piston rod 10 through a bolt; the inner annular cylinder body 21 is welded on a second base 22, the second base 22 is fixedly connected to the upper bottom surface of the outer cylinder body 7 through bolts, the second base 22 and the outer cylinder body 7 are sealed in a static sealing mode, and finally an oil-free cavity is formed in the inner cylinder body, and a ball screw pair of the motion conversion mechanism is installed in the oil-free cavity; the outer cylinder body 7 is provided with a cooling liquid inlet 71 and a cooling liquid outlet 72, the cooling liquid inlet 71 is connected with the first cooling hose 9, and the cooling liquid outlet 72 is connected with the second cooling hose 34; and a damping hole 18 and a check valve 11 are provided on the piston rod 10, respectively.

Preferably, the gas chamber of the accumulator 28 is filled with inert gas, and when the hydro-pneumatic suspension vibrates, the volume of the gas chamber changes continuously to provide the suspension with a variable stiffness characteristic.

The motion conversion mechanism comprises a driving assembly, a conversion assembly and an output shaft 4, the conversion assembly is arranged in the upper cylinder body 2, the conversion assembly is driven to move by the driving assembly, and the conversion assembly drives the output shaft 4 to move; the driving assembly comprises a ball screw 12, a ball screw nut pair 19, a nut pair supporting seat 14, a double-thrust ball bearing 24 and a bearing seat 25, the nut pair supporting seat 14 is welded on the first bottom plate 16, and the ball screw nut pair 19 is embedded in the nut pair supporting seat 14 and is fixedly connected with the nut pair supporting seat 14 through a bolt; the upper end screw part of the ball screw 12 is sleeved in the ball screw nut pair 19, the lower end stepped shaft part is provided with a double-thrust ball bearing 24 (penetrating through the double-thrust ball bearing 24), a shaft shoulder is adopted to position the ball screw post 12 in the axial direction, the double-thrust ball bearing 24 is sleeved in a bearing seat 25, the bearing seat 25 is fixedly connected with the outer cylinder barrel 7 through a bolt, the tail end of the ball screw 12 extends out of the bearing seat 25, and the extending section of the ball screw is connected with the conversion assembly; the conversion component comprises a first one-way bearing 27, a second one-way bearing 30, a first bevel gear 26, a second bevel gear 29, a driven bevel gear 3 and a bearing sealing end cover 6, wherein the first one-way bearing 27 and the second one-way bearing 30 are sequentially sleeved on the extending section of the ball screw 12, the rotating directions of the first one-way bearing 27 and the second one-way bearing 30 are opposite, the first bevel gear 26 is installed on the first one-way bearing 27, the second bevel gear 29 is installed on the second one-way bearing 30, and the first bevel gear 26 and the second bevel gear 29 are driven to reversely rotate through the rotation of the ball screw 12; the bevel pinion 31 is arranged between the first bevel gear 26 and the second bevel gear 29, the axes of the bevel pinion 31 are perpendicular to the axes of the first bevel gear 26 and the second bevel gear 29, the bevel pinion 31 is driven to rotate through the reverse rotation of the first bevel gear 26 and the second bevel gear 29, the outer end of the output shaft 4 penetrates through the bevel pinion 31 and is fixedly connected with the bevel pinion 31, and the output shaft 4 is driven to rotate through the bevel pinion 31; the output shaft 4 is provided with the angular contact bearing 3, the outer ring of the angular contact bearing 3 is fixed on the upper cylinder body 2, the outer side of the outer ring is hermetically connected with the upper cylinder body 2 through the embedded bearing cover 6, the sealing effect is ensured, when the cooling device is used, the output shaft 4 rotates to drive the cooling mechanism to work, and the cooling mechanism is used for cooling the composite oil-gas spring;

preferably, in order to ensure the connection effect, the first one-way bearing 27 and the second one-way bearing 30 are connected with the ball screw 12 by a key for circumferential positioning; the first bevel gear 26 and the first one-way bearing 27 as well as the second bevel gear 29 and the second one-way bearing 30 are in key connection for circumferential positioning; a first retainer ring 35 is adopted between the first one-way bearings 27 of the first bevel gear 26 for axial positioning, and a second retainer ring 36 is adopted between the second bevel gear 29 and the second one-way bearing 30 for axial positioning; the first retainer ring 35 and the second retainer ring 36 are fixed on the first bevel gear 26 and the second bevel gear 29 respectively through screws, and the shaft end retainer ring and the bevel gear are coaxially arranged.

Preferably, the bevel pinion 31 is connected to the output shaft 4 in an axial direction by a shoulder and in a circumferential direction by a spline.

The cooling mechanism comprises a compressor 5, an expansion valve 8, an evaporator 13, a condenser 20 and a connecting pipeline 32, wherein an input shaft of the compressor 5 is an output shaft 4, a refrigerant output end of the compressor 5 is connected with the connecting pipeline 32, high-temperature and high-pressure refrigerant is pumped out through the connecting pipeline 32, the other end of the connecting pipeline 32 is connected with the condenser 20, the refrigerant is thermally released in the condenser 20 to be changed into high-pressure liquid refrigerant, the condenser 20 is connected with the expansion valve 8 through a pipeline, the expansion valve 8 is connected with a first cooling hose 9, the refrigerant flows into the first cooling hose 9 through the expansion valve 8, the pressure is reduced to be changed into a low-temperature vapor-liquid mixed state, the first cooling hose 9 is connected with the head end of the evaporator 13, the refrigerant absorbs heat after entering the evaporator 13 and is changed into a gas state, the tail end of the evaporator 13 is connected with a second cooling, gaseous refrigerant is sucked into the compressor 5 through the external pipeline 33, the compressor 5 works again to compress low-pressure gaseous refrigerant to high-temperature high-pressure gaseous refrigerant and pump out the high-temperature high-pressure gaseous refrigerant, a cooling cycle is completed, heat exchange between the inside of the oil-gas spring and the external environment is achieved, the oil temperature in the oil-gas spring is reduced, and the oil viscosity and the oil density are controlled, so that the large-range change of damping of the oil-gas spring caused by severe oil temperature rise is controlled, the vibration damping effect of the vibration damper is effectively improved, and meanwhile, the effect that the sealing element is aged and loses efficacy due to.

Preferably, a speed increaser is further arranged between the compressor 5 and the output shaft 4 of the motion conversion mechanism, so that the working efficiency of the compressor is enhanced, and the cooling effect is improved.

Preferably, to increase the heat absorption and dissipation area, the condenser 20 and the evaporator 13 have a serpentine structure outside and inside the hydro-pneumatic spring.

The working principle of the composite hydro-pneumatic spring device with the self-cooling function is as follows:

an internal annular cylinder body 21 and an annular cylinder body 17 are arranged in the automobile hydro-pneumatic spring, the internal annular cylinder body 21 is nested in the annular cylinder body 17, a dynamic sealing mode is adopted between the internal annular cylinder body and the annular cylinder body 17, so that an oil-free cavity is formed in the internal annular cylinder body, and a ball screw pair is arranged in the oil-free cavity; when the automobile runs on an uneven road surface, the oil-gas spring is excited by the road surface and vibrates violently to drive oil to enter and exit the damping hole 18 and the one-way valve 11, so that a large amount of heat is generated;

while when the hydro-pneumatic spring is vibrating, there are two modes of motion: the vibration direction is upward or downward;

if the first one-way bearing 27 rotates rightwards to be in a blocking state, the second one-way bearing 30 rotates leftwards to be in a blocking state, and the ball screw 12 rotates rightwards:

(1) when the vibration direction is upward: the ball screw 12 rotates rightwards, at the moment, the first one-way bearing 27 is locked to drive the first bevel gear 26 to rotate rightwards, the first bevel gear 26 drives the small bevel gear 31 to rotate downwards, at the moment, the second one-way bearing 30 is in a rotating state, and the second bevel gear 29 rotates leftwards along with the small bevel gear 31;

(2) when the vibration direction is downward: the ball screw rotates leftwards, at the moment, the second one-way bearing 30 is blocked to drive the second bevel gear 29 to rotate leftwards, the second bevel gear 29 drives the small bevel gear 31 to rotate downwards, at the moment, the first one-way bearing 27 is in a rotating state, and the first bevel gear 26 rotates rightwards along with the small bevel gear 31;

finally, the bidirectional rotation of the hydro-pneumatic spring is changed into the unidirectional rotation of the small bevel gear 31 through the motion conversion mechanism, the small bevel gear 31 is connected to the output shaft 4 through a key, and the output shaft 4 is connected to the input shaft of the compressor 5 to drive the compressor to work;

the refrigerant is easy liquefied gas under normal temperature, when the compressor works under the excitation of the road surface, the compressor 5 compresses the gaseous refrigerant into high-temperature high-pressure steam; the high-temperature high-pressure steam enters the condenser 20 through the connecting pipeline 32; the high-temperature steam is cooled in the condenser under the action of the external environment, releases heat and becomes liquid; the liquid refrigerant enters an expansion valve 8 through a connecting pipeline for throttling expansion and is changed into a low-temperature low-pressure liquid-gas mixed state; the liquid-gas mixed refrigerant enters the evaporator 13, absorbs heat and is gasified under the action of high-temperature hydraulic oil, and is changed into a gas state; the gaseous refrigerant is sucked by the compressor 5, is converted into high-temperature high-pressure steam after being compressed and is pumped out again, and the cooling of the oil-gas spring is completed;

when the road surface excitation is increased, the vibration frequency and the amplitude of the hydro-pneumatic spring are increased, and the heat productivity of the oil is increased; under the excitation of the hydro-pneumatic spring, the rotation speed of the ball screw 12 in the motion conversion mechanism is increased, the first bevel gear 26 and the second bevel gear 29 are driven to move at a high speed, the rotation speed of the small bevel gear 31 is increased, the compressor 5 runs at a high speed, the circulation speed of the cooling system is increased, and therefore the heat dissipation speed is increased.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.