A vibration suppression device for a rear subframe

Abstract

The present invention belongs to the field of vehicle shock absorption, specifically a vibration suppression device for a rear subframe, comprising an upper connecting seat and a lower connecting seat, a spring is connected between the upper connecting seat and the lower connecting seat, a connecting shaft is installed on the top of the upper connecting seat and the bottom of the lower connecting seat, a sealing cylinder is fixedly connected to the top of the lower connecting seat, a separation seat is installed on the top of the sealing cylinder, and a filling seat for sealing the fixing groove and adding a new sealing gasket is arranged in the fixing groove; through this arrangement, there is no need to remove the separation seat, and the internal shock absorbing oil will not be exposed to the air, thereby reducing internal pollution and the problem of insufficient stability of subsequent installation of the separation seat, which leads to leakage of the internal shock absorbing oil. At the same time, this method is simple and easy to operate, so that the replacement of the sealing gasket can be easier and more frequent, thereby improving the safety of the device. At the same time, there is no need to ensure that the injection molded sealing gasket has a long service life, because the replacement is convenient and only needs to be replaced regularly and frequently.

Description

Technical Field

[0001] The invention belongs to the field of vehicle shock absorption, in particular to a vibration suppression device for a rear subframe. Background Art

[0002] The frame vibration suppression structure is commonly known as the shock absorber. The automobile shock absorber is an important part of the suspension system. Its main function is to absorb and reduce the vibration and impact caused by uneven road surface when the vehicle is driving, thereby improving the stability and ride comfort of the vehicle. The working principle of the shock absorber is to consume the vibration energy through the internal piston movement, convert it into heat energy, and then dissipate it into the atmosphere.

[0003] A patent application with publication number CN114670969A discloses a vehicle shock absorber, which belongs to the technical field of shock absorbers. The device comprises a fork shoulder and fork shafts which are installed on both sides of the bottom of the fork shoulder and are symmetrically arranged. A wheel axle for fixing the wheel is installed between the two fork shafts. The angle between the wheel axle and the fork shaft is a right angle or an acute angle. When the wheel is subjected to lateral pressure, the angle between the wheel axle and the fork shaft is an acute angle. The buffering effect can be adjusted according to the pressure of the vehicle body on the wheel. The device has a buffering function, which can improve riding comfort, protect the vehicle body, and extend the service life of the vehicle body.

[0004] Traditional shock absorbers need to maintain their internal sealing. When the shock absorber oil leaks, the shock absorber will completely lose its function. The key to sealing is the sealing gasket, but the replacement of the sealing gasket is rather cumbersome and requires the disassembly of a large number of structures, exposing the internal shock absorber oil to the air, which is quite inconvenient.

[0005] To this end, the present invention provides a vibration suppression device for a rear subframe. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: a vibration suppression device for a rear subframe described in the present invention comprises an upper connecting seat and a lower connecting seat, a spring 1 is connected between the upper connecting seat and the lower connecting seat, a connecting shaft is installed at the top of the upper connecting seat and the bottom of the lower connecting seat, a sealing cylinder is fixedly connected to the top of the lower connecting seat, a separation seat is installed at the top of the sealing cylinder, a sliding hole is opened at the top of the separation seat to penetrate to the bottom, a buffer rod is slidably connected in the sliding hole, a piston plate through which a buffer solution can pass is fixedly connected to the outside of the buffer rod against the bottom, the piston plate is located inside the sealing cylinder, two sealing gaskets are arranged on the inner wall of the separation seat, a fixing groove for removing the sealing gasket is opened on the outside of the separation seat, a filling seat for sealing the fixing groove and adding a new sealing gasket is arranged in the fixing groove; through the setting of the filling seat, after removing the spring 1, the filling seat only needs to be removed outwards to see the sealing inside. Sealing gasket, at this time, use a blade or other tools to cut off the surface of the sealing gasket, then the sealing gasket can be pulled out from the fixed groove, and then the filling seat is placed in the fixed groove for sealing and fixing, and the molten sealing gasket material is injected into the fixed groove through the filling seat. The traditional material of the sealing gasket is generally rubber or polyurethane material. Only materials with thermoplastic properties can be used here. After the material is injected, as the temperature decreases, the material will form a new sealing gasket in the area where the original sealing gasket existed, thereby realizing the replacement of the sealing gasket. Through this setting, there is no need to remove the separation seat, and the internal shock-absorbing oil will not be exposed to the air, reducing internal pollution and the subsequent unstable installation of the separation seat, resulting in internal shock-absorbing oil leakage. At the same time, this method is simple and easy to operate, so that the replacement of the sealing gasket can be easier and more frequent, thereby improving the safety of the device. At the same time, there is no need to ensure that the injection molded sealing gasket has a long life, because of the convenience of replacement, only regular and frequent replacement is required.

[0008] Preferably, a filling valve is installed in the middle of the filling seat, a bolt for fixing the filling seat is installed on the top surface of the separation seat, a sealing groove for fixing the sealing gasket is opened on the inner wall of the separation seat, and the sealing groove is connected with the fixing groove. After the filling seat is put back into the fixing groove, the molten sealing gasket material is injected into the sealing groove through the filling valve. At this time, the sealing groove and the buffer rod are in contact with each other, and the cavity of the sealing groove has the same shape as the sealing gasket. Since the buffer rod is in full contact with the shock-absorbing oil during the up and down sliding process, the formed oil film can serve as a barrier. When the material solidifies, it can be easily separated from the buffer rod without affecting the normal sliding of the buffer rod.

[0009] Preferably, a widening ring is provided on the outer side of the buffer rod, and the widening ring is formed by splicing two flat semicircular metal rings. The widening ring is located on the outer side of the sealing cylinder, and the buffer rod is not completely in contact with the separation seat. If it is completely in contact, it cannot slide. In order to ensure that the molten sealing gasket material does not leak at the upper and lower ends during the injection molding process, the widening ring is first sleeved on the outer side of the buffer rod, and the two metal rings are merged and fixed to each other. Then the buffer rod slides down and the widening ring is moved to the position of the sealing gasket. In this way, the sealing groove where the sealing gasket is located can be sealed. After sealing, injection molding is performed again. In this way, it can be ensured that the side of the formed sealing gasket in contact with the buffer rod is flat and smooth. Then the buffer rod slides up and the widening ring is removed.

[0010] Preferably, two groups of airflow grooves are provided inside the separation seat, and the two groups of airflow grooves are symmetrically arranged, each group includes two airflow grooves, the ends of the airflow grooves are connected to the sealing grooves, and a one-way valve 2 is installed at the ends of the airflow grooves. When the sealing gasket is made, air pressure is injected into the two groups of airflow grooves, which can not only detect whether the filling sealing gasket is made to be qualified, but if it is unqualified, the air pressure will be removed from the fixed groove to produce airflow sound; the qualified sealed sealing gasket will be squeezed inwardly under the action of external air pressure, so that the inner circle of the sealing gasket will fit tightly against the buffer rod, thereby effectively improving the sealing of the top of the sealing tube and reducing leakage problems.

[0011] Preferably, the outer side of the sealing gasket is concavely arranged, and a docking block is fixedly connected to one end of the filling seat close to the sealing gasket. The shape of the sealing gasket allows the sealing gasket to better receive air pressure from the outer ring. Under the action of the air pressure, the inner ring of the sealing gasket will squeeze the buffer rod inward more evenly to ensure a close fit with the buffer rod, and the shape of the docking block is adapted to the shape of the outer ring of the sealing gasket.

[0012] Preferably, two flow holes are provided on the top surface of the piston plate, and the flow rate can be changed according to the temperature. The two flow holes are symmetrically arranged. The outer surface of the piston plate is provided with four side grooves arranged equidistantly in a ring shape. During the long-term operation of the device, the temperature of the internal shock absorber oil will increase. As the temperature increases, the viscosity will decrease. After the temperature decreases, the mechanical energy consumed during the movement of the piston plate will decrease. Through the setting of the flow holes, when the shock absorber oil temperature is low, the flow holes remain the same. When the shock absorber oil temperature is high, the aperture of the flow holes decreases. At this time, the speed of the shock absorber oil passing through the flow holes will slow down, so that the movement resistance borne by the piston plate will increase. Through this setting, the problem of weakened shock absorption effect after the shock absorber oil temperature increases due to long-term driving of the vehicle is greatly reduced. With the setting of the side grooves, the movement of the shock absorber oil is dispersed to multiple side grooves and flow holes, reducing the friction damage to a single through hole.

[0013] Preferably, the piston plate and the buffer rod are internally slidably connected with two sliding rods, one end of the sliding rod is located in the flow hole, and the end of the sliding rod away from the flow hole is provided with a diaphragm block for controlling the movement of the sliding rod. When the temperature of the shock absorber oil rises, the diaphragm block will expand and push the sliding rod outward, so that the sliding rod is horizontal in the flow hole, thereby reducing the inner diameter of the flow hole and reducing the speed of the shock absorber oil passing through.

[0014] Preferably, the slide bar is arranged at an inclination, and the flow hole is installed with a one-way valve 1 at the position where the end of the slide bar is facing, and a spring 2 is fixedly connected between the slide bar and the buffer rod. The one-way valves 1 of the two flow holes are installed in opposite positions, and the flow directions of the shock absorber oil in the two flow holes are opposite, and the flow direction of the shock absorber oil is the same as the inclination direction of the slide bar. When the shock absorber oil temperature is low, the diaphragm block does not push the slide bar outward. At this time, the slide bar will not be affected by the shock absorber oil. When the shock absorber oil temperature is too high, the diaphragm block pushes the slide bar outward. At this time, the end of the slide bar is located in the flow hole, and the one-way flow of the shock absorber oil will make the slide bar slide out completely and be blocked in the flow hole. When the vehicle is no longer driving, the shock absorber oil temperature gradually drops, and the shock absorber oil no longer flows. The slide bar will be reset under the action of the spring 2. The elastic potential energy of the spring 2 is small, and it cannot counteract the pulling force on the slide bar generated by the shock absorber oil moving process, but it can help the slide bar return to its position when the shock absorber oil does not flow.

[0015] Preferably, a force-bearing plate is fixedly connected to the end of the sliding rod, and the force-bearing plate is arranged in an arc shape, and the curvature of the force-bearing plate is the same as the curvature of the flow hole. The force-bearing plate fits the flow hole, and the force-bearing plate fits the flow hole at the beginning. The edge of the force-bearing plate is not smoothly transitioned, so when the shock-absorbing oil flows, the force-bearing plate will be close to the inner wall of the flow hole. When the sliding rod is ejected, the force-bearing plate is pushed out more. At this time, there is a gap between the force-bearing plate and the flow hole through which the shock-absorbing oil can flow. In addition, the inclined sliding rod causes the force-bearing plate to quickly pull the sliding rod to slide outward, so that the sliding rod can respond quickly after the temperature of the shock-absorbing oil rises, thereby completing the effect of changing the internal space of the flow hole.

[0016] Preferably, the diaphragm block is composed of a metal cylinder and a diaphragm, the top surface of the metal cylinder is an opening, the opening is covered by the diaphragm, the bottom of the metal cylinder is connected to a thin metal tube, the end of the thin tube is connected to a temperature-sensing chamber of metal, the temperature-sensing chamber is filled with refrigerant, the temperature-sensing chamber is connected to the diaphragm block through the thin tube, the end of the temperature-sensing chamber is located on the surface of the piston plate, when the temperature of the shock-absorbing oil rises, the refrigerant in the temperature-sensing chamber will absorb heat and vaporize, and the vaporized refrigerant is transferred to the diaphragm block through the thin tube, the diaphragm of the diaphragm block is made of elastic material, and will be pushed outward under pressure, thereby pushing the sliding rod outward, so that the resistance to the movement of the piston plate will increase, adapting to the shock-absorbing oil with reduced viscosity. Through this arrangement, the effect of maintaining the shock-absorbing ability of the device under temperature changes is achieved, and dichloromethane can be used as the refrigerant.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. A vibration suppression device for a rear subframe described in the present invention, through the setting of a filling seat, after the spring is removed, only the filling seat needs to be removed outwards to see the internal sealing gasket. At this time, the sealing gasket surface can be cut using a blade or other tool to pull the sealing gasket out of the fixing groove, and then the filling seat is placed in the fixing groove for sealing and fixing, and the sealing gasket material in a molten state is injected into the fixing groove through the filling seat. The traditional material of the sealing gasket is generally rubber or polyurethane material, and only materials with thermoplastic properties can be used here. After the material is injected, as the temperature decreases, the material will form a new sealing gasket in the area where the sealing gasket originally existed, thereby realizing the replacement of the sealing gasket. Through this setting, there is no need to remove the separation seat, and the internal shock-absorbing oil will not be exposed to the air, reducing internal pollution and the problem of insufficient stability of the subsequent separation seat installation, resulting in leakage of the internal shock-absorbing oil. At the same time, this method is simple and easy to operate, so that the replacement of the sealing gasket can be easier and more frequent, thereby improving the safety of the device. At the same time, there is no need to ensure that the injection-molded sealing gasket has a long life, because the replacement is convenient, only regular and frequent replacement is required.

[0019] 2. The vibration suppression device for the rear subframe described in the present invention, after the filling seat is put back into the fixed groove, the molten sealing gasket material is injected into the sealing groove through the filling valve, at this time, the sealing groove and the buffer rod are fitted with each other, and the cavity of the sealing groove has the same shape as the sealing gasket, because the buffer rod is in full contact with the shock-absorbing oil during the up and down sliding process, the formed oil film can serve as a barrier, when the material solidifies, it can be easily separated from the buffer rod, and will not affect the normal sliding of the buffer rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 is a stereogram of the present invention;

[0022] Figure 2 is an expanded view of the present invention;

[0023] Figure 3 is a cross-sectional view of the sealing cylinder of the present invention;

[0024] Figure 4 is a cross-sectional view of the separation seat of the present invention;

[0025] Figure 5 is a three-dimensional diagram of the piston plate of the present invention;

[0026] Figure 6 is a three-dimensional diagram of the slide bar of the present invention;

[0027] Figure 7 is a three-dimensional diagram of the filling seat of the present invention;

[0028] In the figure: 1. upper connecting seat; 2. lower connecting seat; 3. connecting shaft; 4. spring 1; 5. sealing cylinder; 6. buffer rod; 7. separation seat; 8. widening ring; 9. sealing gasket; 10. piston plate; 11. fixing groove; 12. filling seat; 13. filling valve; 14. air flow groove; 15. flow hole; 16. one-way valve 1; 17. temperature sensing chamber; 18. side groove; 19. sliding rod; 20. force plate; 21. diaphragm block; 22. capillary; 23. docking block. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0030] like Figures 1 to 4 As shown, a vibration suppression device for a rear subframe according to an embodiment of the present invention comprises an upper connecting seat 1 and a lower connecting seat 2, a spring 4 is connected between the upper connecting seat 1 and the lower connecting seat 2, a connecting shaft 3 is installed at the top of the upper connecting seat 1 and the bottom of the lower connecting seat 2, a sealing cylinder 5 is fixedly connected to the top of the lower connecting seat 2, a separation seat 7 is installed at the top of the sealing cylinder 5, a sliding hole penetrating to the bottom is opened at the top of the separation seat 7, a buffer rod 6 is slidably connected in the sliding hole, a piston plate 10 through which a buffer can pass is fixedly connected to the outer side of the buffer rod 6 by the bottom, the piston plate 10 is located inside the sealing cylinder 5, two sealing gaskets 9 are arranged on the inner wall of the separation seat 7, a fixing groove 11 for removing the sealing gasket 9 is opened on the outer side of the separation seat 7, and a filling seat 12 for sealing the fixing groove 11 and adding a new sealing gasket 9 is arranged in the fixing groove 11;

[0031] When working, the connecting shafts 3 at both ends of the device are connected to the frame and the vehicle body. The vibration generated during the driving of the vehicle will first squeeze the spring 4, and the potential energy will be partially stored in the spring 4. Then the spring 4 rebounds, and the sealing cylinder 5 is filled with shock-absorbing oil. During the movement of the piston plate 10, the shock-absorbing oil will continuously pass through the piston plate 10 to provide resistance to the piston plate 10. In this way, a large amount of potential energy is consumed during the movement of the piston plate 10, thereby reducing the impact of vibration on the vehicle. In order to prevent the shock-absorbing oil in the sealing cylinder 5 from leaking, the traditional shock-absorbing device needs to be provided with a sealing pad 9 and a buffer rod 6, providing sealing performance, but in the long-term working process, with the increase of friction times and the drastic change of shock absorber oil temperature during operation, the sealing performance of the sealing gasket 9 will be rapidly reduced, so the sealing gasket 9 needs to be replaced regularly, but the sealing gasket 9 needs to be completely removed, and the spring 1 4, the upper connecting seat 1, the lower connecting seat 2 and the separation seat 7 can be replaced later, which is not only cumbersome, but also because the sealing cylinder 5 is opened, the shock absorber oil inside is exposed to the outside, which is not only easy to pollute the shock absorber oil, but also the separation seat 7 is easily installed after being disassembled, which may cause the sealing performance to be reduced. The degree is affected. Through the setting of the filling seat 12, after the spring 14 is removed, the filling seat 12 only needs to be removed outwards to see the internal sealing gasket 9. At this time, a tool such as a blade is used to cut the surface of the sealing gasket 9, so that the sealing gasket 9 can be pulled out from the fixing groove 11. Then the filling seat 12 is placed in the fixing groove 11 for sealing and fixing. The sealing gasket 9 material in a molten state is injected into the fixing groove 11 through the filling seat 12. The traditional material of the sealing gasket 9 is generally rubber or polyurethane material. Only materials with thermoplastic properties can be used here. After the material is injected, As the temperature drops, the material will form a new sealing gasket 9 in the area where the sealing gasket 9 originally existed, thereby realizing the replacement of the sealing gasket 9. Through this arrangement, there is no need to remove the separation seat 7, and the internal shock-absorbing oil will not be exposed to the air, thereby reducing internal pollution and the problem of unstable installation of the subsequent separation seat 7, which leads to leakage of the internal shock-absorbing oil. At the same time, this method is simple and easy to operate, which makes the replacement of the sealing gasket 9 easier and more frequent, thereby improving the safety of the device. At the same time, there is no need to ensure that the injection-molded sealing gasket 9 has a long life, because it is convenient to replace and only needs to be replaced regularly and frequently.

[0032] like Figures 1 to 7 As shown, a filling valve 13 is installed in the middle of the filling seat 12, a bolt 1 for fixing the filling seat 12 is installed on the top surface of the separation seat 7, and a sealing groove for fixing the sealing gasket 9 is opened on the inner wall of the separation seat 7, and the sealing groove is connected with the fixing groove 11;

[0033] During operation, after the filling seat 12 is put back into the fixed groove 11, the molten sealing gasket 9 material is injected into the sealing groove through the filling valve 13. At this time, the sealing groove and the buffer rod 6 fit each other, and the cavity of the sealing groove has the same shape as the sealing gasket 9. Since the buffer rod 6 is in full contact with the shock-absorbing oil during the up and down sliding process, the formed oil film can serve as a barrier. When the material solidifies, it can be easily separated from the buffer rod 6 without affecting the normal sliding of the buffer rod 6.

[0034] like Figures 1 to 7 As shown, a widening ring 8 is provided on the outer side of the buffer rod 6. The widening ring 8 is formed by splicing two flat semicircular metal rings. The widening ring 8 is located on the outer side of the sealing cylinder 5;

[0035] During operation, the buffer rod 6 is not completely in contact with the separation seat 7. If it is completely in contact, it cannot slide. In order to ensure that the molten sealing gasket 9 material does not leak at the upper and lower ends during the injection molding process, the widening ring 8 is first sleeved on the outer side of the buffer rod 6, and the two metal rings are merged and fixed to each other. Then the buffer rod 6 slides down and the widening ring 8 is moved to the position of the sealing gasket 9. In this way, the sealing groove where the sealing gasket 9 is located can be sealed. After sealing, injection molding can be performed again. In this way, it can be ensured that the side of the sealing gasket 9 formed in contact with the buffer rod 6 is flat and smooth. Then the buffer rod 6 slides up and the widening ring 8 can be removed.

[0036] like Figures 1 to 7 As shown, two groups of air flow grooves 14 are provided inside the separation seat 7, and the two groups of air flow grooves 14 are symmetrically arranged, and each group includes two air flow grooves 14, and the ends of the air flow grooves 14 are connected to the sealing grooves, and the ends of the air flow grooves 14 are installed with a second one-way valve;

[0037] During operation, after the sealing gasket 9 is made, air pressure is injected into the two groups of air flow grooves 14, which can not only detect whether the filled sealing gasket 9 is qualified, but also, if it is unqualified, the air pressure will be removed from the fixed groove 11 to produce air flow sound; the qualified sealed sealing gasket 9 will be squeezed inwardly under the action of external air pressure, so that the inner circle of the sealing gasket 9 will fit tightly against the buffer rod 6, thereby effectively improving the sealing performance of the top of the sealing tube 5 and reducing the leakage problem. The setting of the one-way valve two prevents the air pressure injected into the air flow groove 14 from leaking outward, but will always be in the outer circle of the sealing gasket 9, so that the sealing gasket 9 always keeps in contact with the buffer rod 6.

[0038] like Figures 1 to 7 As shown, the outer side of the sealing gasket 9 is arranged in a concave shape, and a docking block 23 is fixedly connected to one end of the filling seat 12 close to the sealing gasket 9;

[0039] During operation, the shape of the sealing gasket 9 is set so that the sealing gasket 9 can better receive air pressure from the outer circle. Under the pressure of the air pressure, the inner circle of the sealing gasket 9 will squeeze the buffer rod 6 inward more evenly to ensure a close fit with the buffer rod 6. The shape of the docking block 23 is adapted to the shape of the outer circle of the sealing gasket 9.

[0040] like Figures 1 to 7 As shown, two flow holes 15 are provided on the top surface of the piston plate 10, which can change the flow rate according to the temperature. The two flow holes 15 are symmetrically arranged, and the outer surface of the piston plate 10 is provided with four side grooves 18 arranged in an annular shape and at equal intervals;

[0041] During operation, during the long-term operation of the device, the temperature of the internal shock absorber oil will increase. As the temperature increases, the viscosity will decrease, and the decrease will cause the mechanical energy consumed in the movement of the piston plate 10 to decrease. Through the setting of the flow hole 15, when the shock absorber oil temperature is low, the flow hole 15 remains the same. When the shock absorber oil temperature is high, the aperture of the flow hole 15 decreases. At this time, the speed of the shock absorber oil passing through the flow hole 15 will slow down, so that the movement resistance of the piston plate 10 will increase. Through this setting, the problem of weakened shock absorption effect after the shock absorber oil temperature increases due to long-term driving of the vehicle is greatly reduced. With the setting of the side groove 18, the movement of the shock absorber oil is dispersed to multiple side grooves 18 and the flow hole 15, reducing the friction damage to a single through hole.

[0042] like Figures 1 to 7 As shown, two slide bars 19 are slidably connected inside the piston plate 10 and the buffer rod 6, one end of the slide bar 19 is located in the flow hole 15, and a diaphragm block 21 for controlling the movement of the slide bar 19 is provided at one end of the slide bar 19 away from the flow hole 15;

[0043] During operation, when the temperature of the shock absorber oil increases, the diaphragm block 21 will expand and push the slide bar 19 outward, so that the slide bar 19 is horizontal in the flow hole 15, thereby reducing the inner diameter of the flow hole 15 and reducing the speed of the shock absorber oil passing through.

[0044] like Figures 1 to 7 As shown, the slide bar 19 is tilted, the flow hole 15 is provided with a one-way valve 16 at the end of the slide bar 19, and a spring 2 is fixedly connected between the slide bar 19 and the buffer bar 6;

[0045] When working, the one-way valves 16 of the two circulation holes 15 are installed in opposite positions, and the flow directions of the shock absorber oil in the two circulation holes 15 are opposite, and the flow direction of the shock absorber oil is the same as the inclination direction of the slide bar 19. When the shock absorber oil temperature is low, the diaphragm block 21 does not push the slide bar 19 outward, and the slide bar 19 will not be affected by the shock absorber oil. When the shock absorber oil temperature is too high, the diaphragm block 21 pushes the slide bar 19 outward. At this time, the end of the slide bar 19 is located in the circulation hole 15, and the one-way flow of the shock absorber oil will make the slide bar 19 slide out completely and be blocked in the circulation hole 15. When the vehicle is no longer driving, the shock absorber oil temperature gradually decreases, and the shock absorber oil no longer flows. The slide bar 19 will be reset under the action of the spring 2. The elastic potential energy of the spring 2 is small, and it cannot counteract the pulling force on the slide bar 19 generated during the movement of the shock absorber oil, but it can help the slide bar 19 return to its position when the shock absorber oil does not flow.

[0046] like Figures 1 to 7 As shown, a force-bearing plate 20 is fixedly connected to the end of the slide rod 19. The force-bearing plate 20 is arranged in an arc shape. The curvature of the force-bearing plate 20 is the same as the curvature of the flow hole 15. The force-bearing plate 20 fits the flow hole 15.

[0047] During operation, the force-bearing plate 20 initially fits into the flow hole 15, and the edge of the force-bearing plate 20 is not smoothly transitioned, so when the shock-absorbing oil flows, the force-bearing plate 20 will fit closely to the inner wall of the flow hole 15. When the slide rod 19 is pushed out, the force-bearing plate 20 is pushed out further. At this time, there is a gap between the force-bearing plate 20 and the flow hole 15 through which the shock-absorbing oil can flow. In addition, the inclined slide rod 19 causes the force-bearing plate 20 to quickly pull the slide rod 19 outward, so that the slide rod 19 can quickly respond after the shock-absorbing oil temperature rises, thereby completing the effect of changing the internal space of the flow hole 15.

[0048] like Figures 1 to 7 As shown, the diaphragm block 21 is composed of a metal cylinder and a diaphragm. The top surface of the metal cylinder is open, and the opening is covered by the diaphragm. The bottom of the metal cylinder is connected to a thin tube 22 made of metal material, and the end of the thin tube 22 is connected to a temperature sensing chamber 17 made of metal material. The temperature sensing chamber 17 is filled with refrigerant. The temperature sensing chamber 17 is connected to the diaphragm block 21 through the thin tube 22, and the end of the temperature sensing chamber 17 is located on the surface of the piston plate 10;

[0049] During operation, when the temperature of the shock-absorbing oil rises, the refrigerant in the temperature-sensing chamber 17 will absorb heat and vaporize. The vaporized refrigerant is transferred to the diaphragm block 21 through the capillary 22. The diaphragm of the diaphragm block 21 is made of elastic material and will be pushed outward under pressure, thereby pushing the slide rod 19 outward. In this way, the resistance to the movement of the piston plate 10 will increase, adapting to the shock-absorbing oil with reduced viscosity. Through this arrangement, the effect of maintaining the shock-absorbing ability of the device under temperature changes is achieved. Dichloromethane can be used as the refrigerant.

[0050] When working, the connecting shafts 3 at both ends of the device are connected to the frame and the vehicle body. The vibration generated during the driving of the vehicle will first squeeze the spring 4, and the potential energy will be partially stored in the spring 4. Then the spring 4 rebounds, and the sealing cylinder 5 is filled with shock-absorbing oil. During the movement of the piston plate 10, the shock-absorbing oil will continuously pass through the piston plate 10 to provide resistance to the piston plate 10. In this way, a large amount of potential energy is consumed during the movement of the piston plate 10, thereby reducing the impact of vibration on the vehicle. In order to prevent the shock-absorbing oil in the sealing cylinder 5 from leaking, the traditional shock-absorbing device needs to be provided with a sealing pad 9 and a buffer rod 6, providing sealing performance, but in the long-term working process, with the increase of friction times and the drastic change of shock absorber oil temperature during operation, the sealing performance of the sealing gasket 9 will be rapidly reduced, so the sealing gasket 9 needs to be replaced regularly, but the sealing gasket 9 needs to be completely removed, and the spring 1 4, the upper connecting seat 1, the lower connecting seat 2 and the separation seat 7 can be replaced later, which is not only cumbersome, but also because the sealing cylinder 5 is opened, the shock absorber oil inside is exposed to the outside, which is not only easy to pollute the shock absorber oil, but also the separation seat 7 is easily installed after being disassembled, which may cause the sealing performance to be reduced. The degree is affected. Through the setting of the filling seat 12, after the spring 14 is removed, the filling seat 12 only needs to be removed outwards to see the internal sealing gasket 9. At this time, a tool such as a blade is used to cut the surface of the sealing gasket 9, so that the sealing gasket 9 can be pulled out from the fixing groove 11. Then the filling seat 12 is placed in the fixing groove 11 for sealing and fixing. The sealing gasket 9 material in a molten state is injected into the fixing groove 11 through the filling seat 12. The traditional material of the sealing gasket 9 is generally rubber or polyurethane material. Only materials with thermoplastic properties can be used here. After the material is injected, When the temperature is lowered, the material will form a new sealing gasket 9 in the area where the sealing gasket 9 originally existed, thereby realizing the replacement of the sealing gasket 9. Through this arrangement, there is no need to remove the separation seat 7, and the internal shock-absorbing oil will not be exposed to the air, reducing internal pollution and the problem of insufficient stability of the subsequent installation of the separation seat 7, which leads to leakage of the internal shock-absorbing oil. At the same time, this method is simple and easy to operate, making the replacement of the sealing gasket 9 easier and more frequent, improving the safety of the device, and at the same time, there is no need to ensure that the injection-molded sealing gasket 9 has a long life, because it is convenient to replace, and only needs to be replaced regularly and frequently;

[0051] After the filling seat 12 is put back into the fixing groove 11, the molten sealing gasket 9 material is injected into the sealing groove through the filling valve 13. At this time, the sealing groove and the buffer rod 6 are fitted with each other, and the cavity of the sealing groove has the same shape as the sealing gasket 9. Since the buffer rod 6 is in full contact with the shock-absorbing oil during the up and down sliding process, the formed oil film can be used as a barrier. When the material solidifies, it can be easily separated from the buffer rod 6 without affecting the normal sliding of the buffer rod 6.

[0052] The buffer rod 6 is not completely fitted to the separation seat 7. If it is completely fitted, it cannot slide. In order to ensure that the molten sealing gasket 9 material does not leak at both ends during the injection molding process, the widening ring 8 is first sleeved on the outer side of the buffer rod 6, and the two metal rings are merged and fixed to each other. Then the buffer rod 6 slides down and the widening ring 8 is moved to the position of the sealing gasket 9. In this way, the sealing groove where the sealing gasket 9 is located can be blocked. After blocking, injection molding is performed again. In this way, it can be ensured that the formed sealing gasket 9 is flat and smooth on the side in contact with the buffer rod 6. Then the buffer rod 6 slides up and the widening ring 8 can be removed.

[0053] After the sealing gasket 9 is manufactured, air pressure is injected into the two groups of air flow grooves 14, which can not only detect whether the filling sealing gasket 9 is qualified, but also, if it is unqualified, the air pressure will be removed from the fixing groove 11 to produce air flow sound; the qualified sealing gasket 9 will be squeezed inward under the action of the external air pressure, so that the inner circle of the sealing gasket 9 will fit tightly against the buffer rod 6, thereby effectively improving the sealing performance of the top of the sealing tube 5 and reducing the leakage problem;

[0054] The shape of the sealing gasket 9 allows the sealing gasket 9 to better receive air pressure from the outer ring. Under the pressure of the air pressure, the inner ring of the sealing gasket 9 will press the buffer rod 6 inward more evenly to ensure a close fit with the buffer rod 6. The shape of the docking block 23 is adapted to the shape of the outer ring of the sealing gasket 9.

[0055] During the long-term operation of the device, the temperature of the internal shock absorber oil will increase. As the temperature increases, the viscosity will decrease. After the viscosity decreases, the mechanical energy consumed in the movement of the piston plate 10 will decrease. Through the setting of the flow hole 15, when the shock absorber oil temperature is low, the flow hole 15 remains the same. When the shock absorber oil temperature is high, the aperture of the flow hole 15 decreases. At this time, the speed of the shock absorber oil passing through the flow hole 15 will slow down, so that the movement resistance of the piston plate 10 will increase. Through this setting, the problem of weakening the shock absorber effect after the shock absorber oil temperature is high due to long-term driving of the vehicle is greatly reduced. The setting of the side groove 18 disperses the movement of the shock absorber oil to multiple side grooves 18 and the flow hole 15, reducing the friction damage to a single through hole;

[0056] When the temperature of the shock absorber oil increases, the diaphragm block 21 will expand and push the slide bar 19 outward, so that the slide bar 19 is horizontal in the flow hole 15, thereby reducing the inner diameter of the flow hole 15 and reducing the speed of the shock absorber oil passing through;

[0057] The one-way valves 16 of the two flow holes 15 are installed in opposite positions, and the flow directions of the shock absorber oil in the two flow holes 15 are opposite, and the flow direction of the shock absorber oil is the same as the inclination direction of the slide bar 19. When the shock absorber oil temperature is low, the diaphragm block 21 does not push the slide bar 19 outward, and the slide bar 19 will not be affected by the shock absorber oil. When the shock absorber oil temperature is too high, the diaphragm block 21 pushes the slide bar 19 outward. At this time, the end of the slide bar 19 is located in the flow hole 15, and the one-way flow of the shock absorber oil drives the slide bar 19 to slide out completely and be blocked in the flow hole 15. When the vehicle is no longer driving, the shock absorber oil temperature gradually decreases, and the shock absorber oil no longer flows. The slide bar 19 will be reset under the action of the spring 2. The elastic potential energy of the spring 2 is small, and it cannot resist the pulling force on the slide bar 19 generated by the movement of the shock absorber oil, but it can help the slide bar 19 return to its position when the shock absorber oil does not flow.

[0058] The force plate 20 initially fits the flow hole 15, and the edge of the force plate 20 is not smoothly transitioned, so when the damping oil flows, the force plate 20 will be close to the inner wall of the flow hole 15. When the slide bar 19 is ejected, the force plate 20 is ejected further. At this time, there is a gap between the force plate 20 and the flow hole 15 through which the damping oil can flow. In addition, the inclined slide bar 19 makes the force plate 20 quickly pull the slide bar 19 to slide outward, so that the slide bar 19 can quickly respond after the damping oil temperature rises, completing the effect of changing the internal space of the flow hole 15.

[0059] When the temperature of the shock absorber oil rises, the refrigerant in the temperature sensing chamber 17 will absorb heat and vaporize. The vaporized refrigerant is transferred to the diaphragm block 21 through the capillary 22. The diaphragm of the diaphragm block 21 is made of elastic material and will be pushed outward under the action of pressure, thereby pushing the slide rod 19 outward. In this way, the resistance to the movement of the piston plate 10 will increase, adapting to the shock absorber oil with reduced viscosity. Through this arrangement, the effect of maintaining the shock absorption ability of the device under temperature changes is achieved. Dichloromethane can be used as the refrigerant.

[0060] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A vibration suppression device for a rear subframe, characterized in that: The invention comprises an upper connecting seat (1) and a lower connecting seat (2), wherein a spring (4) is connected between the upper connecting seat (1) and the lower connecting seat (2), a connecting shaft (3) is installed at the top of the upper connecting seat (1) and the bottom of the lower connecting seat (2), a sealing cylinder (5) is fixedly connected to the top of the lower connecting seat (2), a separation seat (7) is installed at the top of the sealing cylinder (5), a sliding hole is opened at the top of the separation seat (7) and extends to the bottom, a buffer rod (6) is slidably connected to the sliding hole, and the outer surface of the buffer rod (6) is A piston plate (10) through which a buffer solution can pass is fixedly connected to the bottom side, the piston plate (10) being located inside the sealing cylinder (5), two sealing pads (9) being arranged on the inner wall of the separation seat (7), a fixing groove (11) for removing the sealing pad (9) being opened on the outer side of the separation seat (7), a filling seat (12) for sealing the fixing groove (11) and adding a new sealing pad (9) being arranged in the fixing groove (11), and a molten sealing pad (9) material is injected into the fixing groove (11) through the filling seat (12); A filling valve (13) is installed in the middle of the filling seat (12), a bolt for fixing the filling seat (12) is installed on the top surface of the separation seat (7), and a sealing groove for fixing a sealing gasket (9) is opened on the inner wall of the separation seat (7), and the sealing groove is connected to the fixing groove (11); A widening ring (8) is provided on the outer side of the buffer rod (6), the widening ring (8) being formed by splicing two flat semicircular metal rings, and the widening ring (8) is located on the outer side of the sealing cylinder (5); Two groups of air flow grooves (14) are provided inside the separation seat (7), the two groups of air flow grooves (14) are symmetrically arranged, each group includes two air flow grooves (14), the ends of the air flow grooves (14) are connected to the sealing groove, and a second one-way valve is installed at the ends of the air flow grooves (14).

2. The vibration suppression device for a rear subframe according to claim 1, characterized in that: The outer side of the sealing gasket (9) is arranged in a concave shape, and a docking block (23) is fixedly connected to one end of the filling seat (12) close to the sealing gasket (9).

3. The vibration suppression device for a rear subframe according to claim 2, characterized in that: The top surface of the piston plate (10) is provided with two flow holes (15) capable of changing the flow rate according to the temperature, and the two flow holes (15) are symmetrically arranged. The outer surface of the piston plate (10) is provided with four side grooves (18) arranged in an annular shape and at equal intervals.

4. The vibration suppression device for a rear subframe according to claim 3, characterized in that: Two sliding rods (19) are slidably connected inside the piston plate (10) and the buffer rod (6), one end of the sliding rod (19) is located in the circulation hole (15), and a diaphragm block (21) for controlling the movement of the sliding rod (19) is provided at one end of the sliding rod (19) away from the circulation hole (15).

5. The vibration suppression device for a rear subframe according to claim 4, characterized in that: The slide rod (19) is arranged at an angle, and a one-way valve (16) is installed at a position facing the end of the slide rod (19) at the flow hole (15). A second spring is fixedly connected between the slide rod (19) and the buffer rod (6).

6. The vibration suppression device for a rear subframe according to claim 5, characterized in that: A force-bearing plate (20) is fixedly connected to the end of the sliding rod (19); the force-bearing plate (20) is arranged in an arc shape; the curvature of the force-bearing plate (20) is the same as the curvature of the circulation hole (15); and the force-bearing plate (20) fits the circulation hole (15).

7. The vibration suppression device for a rear subframe according to claim 6, characterized in that: The diaphragm block (21) is composed of a metal cylinder and a diaphragm. The top surface of the metal cylinder is an opening, and the opening is covered by the diaphragm. The bottom of the metal cylinder is connected to a thin tube (22) made of metal material. The end of the thin tube (22) is connected to a temperature sensing chamber (17) made of metal material. The temperature sensing chamber (17) is filled with refrigerant. The temperature sensing chamber (17) is connected to the diaphragm block (21) through the thin tube (22). The end of the temperature sensing chamber (17) is located on the surface of the piston plate (10).

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