Hydraulic damper and vibration reduction system

Abstract

The invention relates to the technical field of vibration reduction, in particular to a hydraulic damper and a vibration reduction system. One end of a piston rod of the hydraulic damper is connected with a working piston arranged in the damper body, and the other end of the piston rod extends out of the damper body and is provided with an upper hanging ring; a lower hanging ring is arranged on the section, deviating from the upper hanging ring, of the damper body. A floating piston and an inflation shock absorber are arranged at the bottom of an inner cavity of the damper body. The protection unit is movably arranged on the periphery of the damper body. The auxiliary vibration reduction unit is arranged on the periphery of the damper body, located in an inner bin of the protection unit and in transmission connection with the end, stretching out of the damper body, of the piston rod. A sealing unit is arranged at the end, where the piston rod extends out, of the damper body. The hydraulic damper is simple in structure and convenient to install, the vibration reduction performance can be improved, the protection performance of the hydraulic damper can be improved, oil in a cylinder can be prevented from being reduced, and then the service life can be prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration reduction, and in particular to a hydraulic damper and a vibration reduction system. Background Art

[0002] The universal wheel can be installed at the bottom of the cart, and the hydraulic damper is installed on the shock absorber bracket near the universal wheel shaft. The hydraulic damper is used to reduce the vibration of the vehicle body. The upper lifting ring of the hydraulic damper is connected to the lower lifting ring of the vehicle body to connect the wheel. The hydraulic damper includes a working piston, a piston rod, a floating piston and a pneumatic shock absorber. The working principle of the hydraulic damper is based on the law of conservation of energy. This law states that energy cannot disappear out of thin air, so kinetic energy and potential energy can be converted into each other in the vertical direction. When the car is running, the bump will be transmitted to the hanger, and the kinetic energy will be transmitted to the working piston to move to the other end. The movement of the working piston squeezes the hydraulic oil, and the hydraulic oil is squeezed out from the gap between the floating piston and the axis into the pneumatic shock absorber. When the hydraulic oil in the pneumatic shock absorber increases, the resistance of the floating piston increases at this time, which will give the floating piston a reaction force, allowing the hydraulic oil to reset and complete a vibration reduction action.

[0003] Because of the long-term and frequent reciprocating motion of the piston rod of the hydraulic damper, the hydraulic oil in the internal pressure cylinder will be brought out. After a long time, the amount of oil in the internal pressure cylinder will decrease, resulting in unstable speed or weakened buffering force. Problems such as needing to be repaired and refilled with oil are very inconvenient and consume a lot of manpower and material resources, and the cost is also high. Even if some hydraulic dampers have an oil supply device, the oil supply process and method are also very inconvenient. Summary of the invention

[0004] The purpose of the present invention includes providing a hydraulic damper and vibration reduction system, which has a simple structure and is easy to install. It can enhance the vibration reduction performance, improve its protection performance, and avoid the reduction of oil in the cylinder, thereby extending the service life.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the present invention provides a hydraulic damper, the hydraulic damper comprising a damper body, a piston rod, a protection unit, an auxiliary vibration reduction unit and a sealing unit;

[0007] One end of the piston rod is connected to the working piston built into the damper body, and the other end of the piston rod extends out of the damper body and is provided with an upper lifting ring; a section of the damper body away from the upper lifting ring is provided with a lower lifting ring, and a floating piston and a pneumatic shock absorber are provided at the bottom of the inner cavity of the damper body;

[0008] The protection unit can be movably arranged on the outer periphery of the damper body; the auxiliary vibration reduction unit is configured on the outer periphery of the damper body, and is located in the inner compartment of the protection unit, and is transmission connected with one end of the piston rod extending out of the damper body; the end of the damper body for the piston rod to extend is configured with a sealing unit.

[0009] In an optional embodiment, the protection unit includes two sliders, two connecting rods, two first springs and a protection plate;

[0010] The two sliders are slidably arranged on the outer periphery of the damper body along the axial direction of the damper body, and the two sliders are respectively hinged to one end of the two connecting rods, and the other ends of the two connecting rods are hinged to the protective plate; the two first springs are respectively connected to a first spring connected to the damper body.

[0011] In an optional embodiment, the hydraulic damper is configured with two protection units, and both protection plates are semicircular guard plates surrounding the outer circumference of the damper body.

[0012] In an optional embodiment, the auxiliary vibration reduction unit includes a vibration reduction chamber, a vibration reduction plate, a pressure plate, a first elastic airbag and a pressure rod;

[0013] The vibration damping chamber is connected to the outside of the damper body, the vibration damping plate, the pressure plate and the first elastic airbag are all arranged in the vibration damping chamber, and the first elastic airbag is arranged between the vibration damping plate and the pressure plate, one end of the pressure rod is connected to the piston rod, and the other end of the pressure rod is connected to the pressure plate or abuts against the pressure plate.

[0014] In an optional embodiment, the auxiliary vibration reduction unit further includes a second elastic airbag connected to the outside of the vibration reduction chamber, and the second elastic airbag is used to abut against the protective plate.

[0015] In an optional embodiment, the auxiliary vibration reduction unit further includes a vertical plate, a vertical rod, a convex block, an inclined block and a conductive plate;

[0016] The vertical plate is slidably arranged in the vibration-damping bin and is located at the lower side of the vibration-damping plate. The vertical plate is provided with an inclined groove. One end of the vertical rod is connected to the pressing plate, and the other end thereof is connected to the protrusion. The protrusion is slidably matched with the inclined groove.

[0017] The inclined block is connected with the vertical plate; the conducting plate is slidably arranged in the vibration-damping bin and abuts against the inclined block.

[0018] In an optional embodiment, the auxiliary vibration reduction unit further includes an elastic plate and a second spring, wherein the second spring is connected to the elastic plate and is located between the vertical plate and the inner wall of the vibration reduction bin.

[0019] In an optional embodiment, the sealing unit is arranged at the gap where the body and the piston rod are connected, and the sealing unit includes a sealing ring, a support plate, a third spring and a sealing plate;

[0020] The sealing ring is fixed in the damper body, and its piston rod passes through the sealing ring; the support plate is connected to the top of the inner cavity of the damper body, and the sealing plate is connected to the support plate through a third spring;

[0021] The sealing plate is an arc-shaped plate arranged around the outer circumference of the piston rod, and the sealing plate is clamped on the outer circumference of the piston rod.

[0022] In an optional embodiment, an expansion airbag is provided at the connection between the top of the inner cavity of the damper body and the piston rod, one side of the expansion airbag is connected to an air pipe, the bottom of the air pipe passes through the sealing ring and is fixed with an air nozzle.

[0023] In a second aspect, the present invention provides a vibration reduction system, which includes the above-mentioned hydraulic damper.

[0024] The beneficial effects of the hydraulic damper and the vibration reduction system provided by the embodiments of the present invention include:

[0025] The hydraulic damper includes a damper body, a piston rod, a protection unit, an auxiliary vibration reduction unit and a sealing unit; one end of the piston rod is connected to a working piston built into the damper body, and the other end of the piston rod extends out of the damper body and is provided with an upper lifting ring; a section of the damper body away from the upper lifting ring is provided with a lower lifting ring, and a floating piston and a pneumatic shock absorber are provided at the bottom of the inner cavity of the damper body; the protection unit is movably provided at the periphery of the damper body; the auxiliary vibration reduction unit is provided at the periphery of the damper body, and is located in the inner compartment of the protection unit, and is transmission-connected with one end of the piston rod extending out of the damper body; the end of the damper body from which the piston rod extends is provided with a sealing unit. The hydraulic damper is applied to a vibration reduction system, has a simple structure, and is easy to install. It can improve vibration reduction performance, and can improve its protection performance, and can also avoid the reduction of oil in the cylinder, thereby extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of the hydraulic damper provided in this embodiment;

[0028] Figure 2 A schematic diagram of the structure of the damper body provided in this embodiment;

[0029] Figure 3 A schematic diagram of the structure of the vibration reduction bin provided in this embodiment;

[0030] Figure 4 A schematic diagram of the structure of the vibration reduction chamber, the elastic plate and the second spring provided in this embodiment;

[0031] Figure 5 A cross-sectional view of the damper body provided for this embodiment;

[0032] Figure 6 This is an enlarged schematic diagram of the top of the damper body provided in this embodiment.

[0033] Icon: 100-hydraulic damper; 1-damper body; 2-protection unit; 3-auxiliary vibration reduction unit; 4-sealing unit; 5-piston rod; 6-upper lifting ring; 7-lower lifting ring; 8-working piston; 9-floating piston; 201-slider; 202-first spring; 203-connecting rod; 204-protection plate; 301-pressure rod; 302-vibration reduction chamber; 303-second elastic airbag; 304-vibration reduction plate; 305-first elastic airbag; 306-pressing plate; 307-vertical plate; 308-oblique groove; 309-vertical rod; 310-bump; 311-conduction plate; 312-hypotenuse; 313-elastic plate; 314-second spring; 315-oblique block; 401-sealing ring; 402-support plate; 403-third spring; 404-sealing plate; 405-expansion airbag; 406-trachea; 407-air nozzle. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0039] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0040] Please refer to Figure 1-Figure 6 , this embodiment provides a hydraulic damper 100, the hydraulic damper 100 includes a damper body 1, a piston rod 5, a protection unit 2, an auxiliary vibration reduction unit 3 and a sealing unit 4;

[0041] One end of the piston rod 5 is connected to the working piston 8 built into the damper body 1, and the other end of the piston rod 5 extends out of the damper body 1 and is provided with an upper hanging ring 6; a section of the damper body 1 away from the upper hanging ring 6 is provided with a lower hanging ring 7, and a floating piston 9 and a pneumatic shock absorber are provided at the bottom of the inner cavity of the damper body 1;

[0042] The protection unit 2 can be movably arranged on the outer periphery of the damper body 1; the auxiliary vibration reduction unit 3 is configured on the outer periphery of the damper body 1, and is located in the inner compartment of the protection unit 2, and is transmission connected with the end of the piston rod 5 extending out of the damper body 1; the end of the damper body 1 for the piston rod 5 to extend is configured with a sealing unit 4.

[0043] Please refer to Figure 1-Figure 6 , the working principle of the hydraulic damper 100 is:

[0044] The hydraulic damper 100 comprises a damper body 1, a piston rod 5, a protection unit 2, an auxiliary vibration reduction unit 3 and a sealing unit 4; one end of the piston rod 5 is connected to a working piston 8 built into the damper body 1, and the other end of the piston rod 5 extends out of the damper body 1 and is provided with an upper lifting ring 6; a section of the damper body 1 away from the upper lifting ring 6 is provided with a lower lifting ring 7, and a floating piston 9 and a pneumatic shock absorber are provided at the bottom of the inner cavity of the damper body 1; through the above-mentioned structural arrangement, it can be installed in a vibration reduction system to reduce vibration during use;

[0045] The protection unit 2 is movably disposed on the outer periphery of the damper body 1, and its function is to provide protection during use, so as to prevent the damper body 1 and the piston rod 5 or other structures of the hydraulic damper 100 from being damaged by the impact of external structures;

[0046] The auxiliary vibration reduction unit 3 is arranged on the outer periphery of the damper body 1 and is located in the inner compartment of the protection unit 2, and is transmission-connected with the end of the piston rod 5 extending out of the damper body 1, and its function is to improve the vibration reduction effect of the hydraulic damper 100, that is, it can be transmission-connected with the piston rod 5 during the process of the piston rod 5 moving relative to the damper body 1 to reduce vibration, and then can play a vibration reduction effect on the piston rod 5, thereby improving the vibration reduction effect of the hydraulic damper 100;

[0047] The end of the damper body 1 from which the piston rod 5 extends is provided with a sealing unit 4, which can reduce the oil brought out during the movement of the piston rod 5, thereby helping to reduce the leakage of the liquid oil, and at the same time, helps to maintain the amount of oil in the cylinder, thereby helping to maintain its performance.

[0048] In summary, the hydraulic damper 100 is applied to the vibration reduction system, has a simple structure and is easy to install, can enhance the vibration reduction performance, and can improve its protection performance, and can also avoid the reduction of the oil in the cylinder, thereby extending the service life.

[0049] For further information, please refer to Figure 1-Figure 6 In this embodiment, when configuring the protection unit 2, its structure is as follows:

[0050] The protection unit 2 includes two sliders 201, two connecting rods 203, two first springs 202 and a protection plate 204; the two sliders 201 are slidably arranged on the outer periphery of the damper body 1 along the axial direction of the damper body 1, and the two sliders 201 are respectively hinged to one end of the two connecting rods 203, and the other ends of the two connecting rods 203 are hinged to the protection plate 204; the two first springs 202 are respectively connected to a first spring 202 connected to the damper body 1.

[0051] Moreover, the hydraulic damper 100 used in this embodiment is equipped with two protection units 2 , and the two protection plates 204 are both semicircular protection plates surrounding the outer circumference of the damper body 1 .

[0052] It should be noted that when the vehicle using the above-mentioned hydraulic damper 100 is moving, when the hydraulic damper 100 collides with bricks or stones on the road, the protective plate 204 will first contact the obstacle, and then the protective plate 204 will be compressed and move. When the protective plate 204 moves, it will rotate in the opposite direction with the two connecting rods 203. When the two connecting rods 203 rotate in the opposite direction, the two sliders 201 move in the opposite direction along the outer wall of the hydraulic damper 100 and compress the first spring 202. The compression and reset of the first spring 202 realize the buffering protection of the hydraulic damper 100. At the same time, when the protective plate 204 moves, it will compress the second elastic airbag 303. The elastic force of the second elastic airbag 303 protects the protective plate 204 and increases its service life. Among them, the second elastic airbag 303 is arranged on the periphery of the auxiliary vibration reduction unit 3, refer to the following content.

[0053] Based on the above-mentioned structural setting, a piston rod 5 is arranged inside the damper body 1, one end of the piston rod 5 extends out of the damper body 1 and is fixed with an upper hanging ring 6, and a lower hanging ring 7 is fixed to the bottom of the damper body 1, and a working piston 8 is arranged inside the damper body 1, and the bottom of the piston rod 5 is connected to the working piston 8, and a floating piston 9 and a pneumatic shock absorber are arranged at the bottom of the inner cavity of the damper body 1. When the car equipped with universal wheels is running, the bumps will be transmitted to the hanger, and the kinetic energy will be transmitted to the working piston 8 so that it moves to the other end. The piston rod 5 moves with the working piston 8 to squeeze the hydraulic oil, and the hydraulic oil is squeezed out from the gap between the floating piston 9 and the axis into the pneumatic shock absorber. When the hydraulic oil in the pneumatic shock absorber increases, the resistance of the floating piston 9 increases at this time, which will give the floating piston 9 a reaction force, allowing the hydraulic oil to reset and complete a vibration reduction action.

[0054] For further information, please refer to Figure 1-Figure 6 In this embodiment, when the auxiliary vibration reduction unit 3 is configured, its structure is as follows:

[0055] The auxiliary vibration reduction unit 3 includes a vibration reduction chamber 302, a vibration reduction plate 304, a pressure plate 306, a first elastic airbag 305 and a pressure rod 301; the vibration reduction chamber 302 is connected to the outside of the damper body 1, the vibration reduction plate 304, the pressure plate 306 and the first elastic airbag 305 are all arranged in the vibration reduction chamber 302, and the first elastic airbag 305 is arranged between the vibration reduction plate 304 and the pressure plate 306, one end of the pressure rod 301 is connected to the piston rod 5, and the other end of the pressure rod 301 is connected to the pressure plate 306 or abuts against the pressure plate 306.

[0056] In addition, the auxiliary vibration reduction unit 3 further includes a second elastic airbag 303 connected to the outside of the vibration reduction chamber 302 . The second elastic airbag 303 is used to abut against the protective plate 204 .

[0057] In addition, the auxiliary vibration reduction unit 3 further includes a vertical plate 307, a vertical rod 309, a protrusion 310, an inclined block 315 and a conductive plate 311;

[0058] The vertical plate 307 is slidably disposed in the vibration damping bin 302 and is located at the lower side of the vibration damping plate 304. The vertical plate 307 is provided with an inclined groove 308. One end of the vertical rod 309 is connected to the pressure plate 306, and the other end thereof is connected to the protrusion 310. The protrusion 310 is slidably matched with the inclined groove 308. The inclined block 315 is connected to the vertical plate 307. The conductive plate 311 is slidably disposed in the vibration damping bin 302 and is abutted against the inclined block 315.

[0059] In addition, the auxiliary vibration reduction unit 3 further includes an elastic plate 313 and a second spring 314 . The second spring 314 is connected to the elastic plate 313 and is located between the vertical plate 307 and the inner wall of the vibration reduction chamber 302 .

[0060] Therefore, the auxiliary shock absorbing unit 3 can further reduce vibration while the hydraulic damper 100 is reducing vibration, thereby improving the shock absorbing effect, and making the vehicle more stable when moving. The auxiliary shock absorbing unit 3 includes a pressure rod 301 arranged on the outside of the piston rod 5, a shock absorbing chamber 302 is fixed to the outside of the damper body 1, a second elastic airbag 303 is fixed to the outside of the shock absorbing chamber 302, a shock absorbing plate 304 is fixed to the inside of the shock absorbing chamber 302, a first elastic airbag 305 is fixed to the top of the shock absorbing plate 304, a pressure plate 306 is slidably connected to the top of the inner cavity of the shock absorbing chamber 302, the bottom of the pressure rod 301 is located inside the shock absorbing chamber 302, and the bottom of the pressure rod 301 is in contact with the top of the pressure plate 306.

[0061] Moreover, on the basis of the above structure, the bottom of the vibration damping plate 304 is slidably connected with a vertical plate 307, and the vertical plate 307 can slide in a manner perpendicular to the axis of the damper body, and the vertical plate 307 is provided with an inclined groove 308, and the bottom of the pressure plate 306 is fixed with a vertical rod 309, and the bottom of the vertical rod 309 is fixed with a protrusion 310, and the protrusion 310 is located inside the inclined groove 308, and the inner wall of the vibration damping chamber 302 is slidably connected with a conductive plate 311, and the sliding direction of the conductive plate 311 is the axial direction of the damper body; the bottom of the conductive plate 311 is provided with a hypotenuse 312, a side of the vertical plate 307 is fixed with an inclined block 315, the bottom of the vertical plate 307 is fixed with an elastic plate 313, and the bottom of the vibration damping chamber 302 is fixed with a second spring 314, and one side of the second spring 314 is fixedly connected to the bottom of the vertical plate 307.

[0062] It can be concluded that when the hydraulic damper 100 is working, its piston rod 5 reciprocates in the damper body 1 to perform work, and when the piston rod 5 moves, it brings the pressure rod 301 to press the pressure plate 306, and the pressure plate 306 is subjected to pressure drop and presses the first elastic airbag 305, and the vibration is reduced by the resilience of the first elastic airbag 305. At the same time, when the pressure plate 306 descends, it drives the vertical rod 309 to descend. When the vertical rod 309 descends, the protrusion 310 at the bottom moves in the inclined groove 308, and then brings the vertical plate 307 to move in the vibration reduction chamber 302 toward the direction close to the conductive plate 311, that is, as shown in the figure, it moves toward the left side of the vibration reduction chamber 302, and through the vertical plate 307, the vertical plate 307 moves toward the conductive plate 311. The plate 307 causes the inclined block 315 to move synchronously. The inclined block 315 moves to the left and contacts the inclined edge 312 at the bottom of the conductive plate 311, and then pushes the conductive plate 311 to rise and contact the vibration damping plate 304, which is beneficial for transmitting the vibration to the vibration damping plate 304 through the conductive plate 311, and then the vibration is reduced by the vibration damping plate 304. The vertical plate 307 moves with the elastic plate 313 to squeeze the side wall of the vibration damping chamber 302 and compress the second spring 314. The vibration is further reduced by the rebound of the elastic plate 313 and the elastic vibration reduction of the second spring 314. The auxiliary vibration reduction unit 3 can further reduce vibration on the basis of the damper vibration reduction, thereby maximizing the vibration reduction effect when the vehicle is moving.

[0063] Please refer to Figure 1-Figure 6 In this embodiment, when the sealing unit 4 is configured, its structure is as follows:

[0064] The sealing unit 4 is arranged at the gap where the main body and the piston rod 5 are connected, and the sealing unit 4 includes a sealing ring 401, a support plate 402, a third spring 403 and a sealing plate 404; the sealing ring 401 is fixed in the damper body 1, and its piston rod 5 passes through the sealing ring 401; the support plate 402 is connected to the top of the inner cavity of the damper body 1, and the sealing plate 404 is connected to the support plate 402 through the third spring 403; the sealing plate 404 is an arc-shaped plate arranged around the outer periphery of the piston rod 5, and the sealing plate 404 is clamped on the outer periphery of the piston rod 5.

[0065] An expansion airbag 405 is provided at the connection between the top of the inner cavity of the damper body 1 and the piston rod 5 . An air pipe 406 is connected to one side of the expansion airbag 405 . The bottom of the air pipe 406 passes through the sealing ring 401 and is fixed with an air nozzle 407 .

[0066] Therefore, the sealing unit 4 is arranged at the gap between the damper body 1 and the piston rod 5, and its purpose is to reduce the oil brought out during the movement of the piston rod 5; specifically, the sealing unit 4 includes a sealing ring 401 fixedly arranged inside the damper body 1, and the piston rod 5 passes through the sealing ring 401, a support plate 402 is fixed to the top of the inner cavity of the damper body 1, a third spring 403 is fixed to one side of the support plate 402, and an arc-shaped sealing plate 404 is fixed to one side of the third spring 403, the sealing plate 404 holds the piston rod 5, or it can be clamped on the outer periphery of the piston rod 5. In this way, not only can the hydraulic oil be prevented from being brought out, but also the vibration of the piston rod 5 during movement can be reduced through the third spring 403, an expansion airbag 405 is arranged at the connection between the top of the inner cavity of the damper body 1 and the piston rod 5, and an air pipe 406 is connected to one side of the expansion airbag 405, and the bottom of the air pipe 406 passes through the sealing ring 401 and is fixed with an air nozzle 407.

[0067] In summary, please refer to Figure 1-Figure 6 The sealing ring 401 of the sealing unit 4 is conducive to achieving the first seal to prevent the hydraulic oil from being brought out. The two sealing plates 404 hold the piston rod 5, which can not only prevent the hydraulic oil from being brought out but also reduce the vibration of the piston rod 5 during movement through the third spring 403. At the same time, when the piston rod 5 extends from the damper body 1, the gas in the damper body 1 is compressed by the working piston 8, and then enters the interior of the expansion airbag 405 from the air nozzle 407 through the air pipe 406. The expansion airbag 405 expands to fill the gap at the connection between the piston rod 5 and the top of the damper body 1, which is conducive to preventing the hydraulic oil from being brought out from the connection gap.

[0068] Based on the above, please refer to Figure 1-Figure 6 During the operation of the hydraulic damper 100, the protective unit 2 is provided, so that when the vehicle equipped with the hydraulic damper 100 is moving, when the hydraulic damper 100 is hit by bricks or stones on the road, the protective plate 204 will first contact the obstacle, and then the protective plate 204 will be compressed and move. When the protective plate 204 moves, it will rotate in the opposite direction with the two connecting rods 203. When the two connecting rods 203 rotate in the opposite direction, the two sliders 201 move in the opposite direction along the outer wall of the damper body and compress the first spring 202. The compression and reset of the first spring 202 realize the buffer protection damper. At the same time, when the protective plate 204 moves, it compresses the second elastic airbag 303. The elastic force of the second elastic airbag 303 protects the protective plate 204 and increases its service life.

[0069] By setting the auxiliary vibration reduction unit 3, when the hydraulic damper 100 is working, the piston rod 5 reciprocates in the damper body 1 to do work. When the piston rod 5 moves, it brings the pressure rod 301 to press the pressure plate 306. The pressure plate 306 is subjected to pressure drop and presses the first elastic airbag 305. The vibration is reduced by the rebound force of the first elastic airbag 305. At the same time, when the pressure plate 306 descends, the vertical rod 309 descends. When the vertical rod 309 descends, the protrusion 310 at the bottom moves in the inclined groove 308, and then brings the vertical plate 307 to move to the left side of the vibration reduction bin 302, and the inclined block 315 moves through the vertical plate 307. 315 moves to the left and contacts the bevel 312 at the bottom of the conduction plate 311, and then the conduction plate 311 rises and contacts the vibration damping plate 304, which is conducive to transmitting the received vibration to the vibration damping plate 304 through the conduction plate 311, and then the vibration damping is achieved through the vibration damping plate 304, and the vertical plate 307 moves with the elastic plate 313 to squeeze the side wall of the vibration damping chamber 302 and compress the second spring 314, and the vibration is further reduced by the rebound of the elastic plate 313 and the elastic vibration damping of the second spring 314. The auxiliary vibration damping unit 3 can further reduce vibration on the basis of the vibration damping of the hydraulic damper 100, thereby maximizing the vibration damping effect when the vehicle is moving;

[0070] By setting up the sealing unit 4, its sealing ring 401 is conducive to achieving the first sealing to prevent the hydraulic oil from being brought out. The two sealing plates 404 hold the piston rod 5, which can not only prevent the hydraulic oil from being brought out but also reduce the vibration of the piston rod 5 during movement through the third spring 403. At the same time, when the piston rod 5 is extended from the damper body 1, the gas in the damper body 1 is compressed by the working piston 8, and then enters the interior of the expansion airbag 405 from the air nozzle 407 through the air pipe 406. The expansion airbag 405 expands to fill the gap at the connection between the piston rod 5 and the top of the damper body 1, which is conducive to preventing the hydraulic oil from being brought out from the connection gap.

[0071] When a vehicle equipped with a universal wheel equipped with the hydraulic damper 100 is running, the bumps will be transmitted to the hanger, and the kinetic energy will be transmitted to the working piston 8 so that it moves to the other end. The piston rod 5 moves the working piston 8 to squeeze the hydraulic oil, and the hydraulic oil is squeezed out from the gap between the floating piston 9 and the axis into the pneumatic shock absorber. When the hydraulic oil in the pneumatic shock absorber increases, the resistance of the floating piston 9 increases, which will give the floating piston 9 a reaction force, allowing the hydraulic oil to reset and complete a vibration reduction action.

[0072] Based on the above, please refer to Figure 1-Figure 6 The embodiment further provides a vibration reduction system, which includes the hydraulic damper 100 mentioned above.

[0073] Please refer to Figure 1-Figure 6 The hydraulic damper 100 and the vibration reduction system have the following advantages:

[0074] 1. By setting the protection unit 2, when the hydraulic damper 100 is hit by bricks or stones on the road during the movement of the vehicle, the protection plate 204 will first contact the obstacle, and then the protection plate 204 will be compressed and move. When the protection plate 204 moves, it drives the two connecting rods 203 to rotate in the opposite direction. When the two connecting rods 203 rotate in the opposite direction, the two sliders 201 move in the opposite direction along the outer wall of the damper body and compress the first spring 202. The compression and reset of the first spring 202 realize buffering protection of the damper body. At the same time, when the protection plate 204 moves, it compresses the second elastic airbag 303. The elastic force of the second elastic airbag 303 protects the protection plate 204 and increases its service life.

[0075] 2. By providing the auxiliary buffer unit, when the hydraulic damper 100 is working, the piston rod 5 reciprocates in the damper body to perform work. When the piston rod 5 moves, it brings the pressure rod 301 to press the pressure plate 306. The pressure plate 306 is subjected to pressure drop and presses the first elastic airbag 305. The vibration is reduced by the rebound force of the first elastic airbag 305. At the same time, when the pressure plate 306 descends, the vertical rod 309 descends. When the vertical rod 309 descends, the protrusion 310 at the bottom moves in the inclined groove 308, and then brings the vertical plate 307 to move to the left side of the vibration reduction chamber 302, so that the inclined block 310 is 15 moves, the inclined block 315 moves to the left and contacts the inclined edge 312 at the bottom of the transmission rod, and then the transmission rod rises and contacts the vibration damping plate 304, which is conducive to transmitting the vibration received to the vibration damping plate 304 through the transmission rod, and then the vibration damping plate 304 is used to achieve vibration reduction, and the vertical plate 307 moves with the elastic plate 313 to squeeze the side wall of the vibration damping bin 302 and compress the second spring 314, and the vibration is further reduced by the rebound of the elastic plate 313 and the elastic vibration reduction of the second spring 314. The auxiliary buffer unit can further reduce vibration on the basis of the damper vibration reduction, thereby maximizing the vibration reduction effect when the vehicle moves;

[0076] 3. Through the setting of the sealing unit 4, the sealing ring 401 is conducive to achieving the first sealing to prevent the hydraulic oil from being brought out. The two sealing plates 404 hold the piston rod 5, which can not only prevent the hydraulic oil from being brought out but also reduce the vibration of the piston rod 5 during movement through the third spring 403. At the same time, when the piston rod 5 extends from the damper body, the gas in the damper body is compressed by the working piston 8, and then enters the interior of the expansion airbag 405 from the air nozzle 407 through the air pipe 406. The expansion airbag 405 expands to fill the gap at the connection between the piston rod 5 and the top of the damper body, which is conducive to preventing the hydraulic oil from being brought out from the connection gap.

[0077] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A hydraulic damper, characterized in that: The hydraulic damper comprises a damper body, a piston rod, a protection unit, an auxiliary vibration reduction unit and a sealing unit; One end of the piston rod is connected to the working piston built into the damper body, and the other end of the piston rod extends out of the damper body and is provided with an upper hanging ring; a section of the damper body away from the upper hanging ring is provided with a lower hanging ring, and a floating piston and a pneumatic shock absorber are provided at the bottom of the inner cavity of the damper body; The protection unit can be movably arranged on the outer periphery of the damper body; the auxiliary vibration reduction unit is configured on the outer periphery of the damper body, and is located in the inner compartment of the protection unit, and is transmission connected with the end of the piston rod extending out of the damper body; the end of the damper body for the piston rod to extend out is configured with a sealing unit.

2. The hydraulic damper according to claim 1, characterized in that: The protection unit includes two sliders, two connecting rods, two first springs and a protection plate; The two sliders are slidably arranged on the outer periphery of the damper body along the axial direction of the damper body, and the two sliders are respectively hinged to one end of the two connecting rods, and the other ends of the two connecting rods are hinged to the protective plate; the two first springs are respectively connected to a first spring connected to the damper body.

3. The hydraulic damper according to claim 2, characterized in that: The hydraulic damper is equipped with two protection units, and both of the two protection plates are semicircular guard plates surrounding the outer periphery of the damper body.

4. The hydraulic damper according to claim 2, characterized in that: The auxiliary vibration reduction unit includes a vibration reduction chamber, a vibration reduction plate, a pressure plate, a first elastic airbag and a pressure rod; The vibration damping chamber is connected to the outside of the damper body, the vibration damping plate, the pressure plate and the first elastic airbag are all arranged in the vibration damping chamber, and the first elastic airbag is arranged between the vibration damping plate and the pressure plate, one end of the pressure rod is connected to the piston rod, and the other end of the pressure rod is connected to the pressure plate or abuts against the pressure plate.

5. The hydraulic damper according to claim 4, characterized in that: The auxiliary vibration reduction unit further includes a second elastic airbag connected to the outside of the vibration reduction chamber, and the second elastic airbag is used to abut against the protective plate.

6. The hydraulic damper according to claim 4, characterized in that: The auxiliary vibration reduction unit also includes a vertical plate, a vertical rod, a convex block, an inclined block and a conductive plate; The vertical plate is slidably disposed in the vibration-damping bin and is located at the lower side of the vibration-damping plate. The vertical plate is provided with an oblique groove. One end of the vertical rod is connected to the pressure plate, and the other end thereof is connected to the protrusion. The protrusion is slidably matched with the oblique groove. The inclined block is connected to the vertical plate; the conductive plate is slidably arranged in the vibration-damping bin and abuts against the inclined block.

7. The hydraulic damper according to claim 6, characterized in that: The auxiliary vibration reduction unit further includes an elastic plate and a second spring. The second spring is connected to the elastic plate and is located between the vertical plate and the inner wall of the vibration reduction bin.

8. The hydraulic damper according to claim 1, characterized in that: The sealing unit is arranged at the gap where the body and the piston rod are connected, and the sealing unit comprises a sealing ring, a support plate, a third spring and a sealing plate; The sealing ring is fixed in the damper body, and the piston rod passes through the sealing ring; the support plate is connected to the top of the inner cavity of the damper body, and the sealing plate is connected to the support plate through the third spring; The sealing plate is an arc-shaped plate arranged around the outer circumference of the piston rod, and the sealing plate is clamped on the outer circumference of the piston rod.

9. The hydraulic damper according to claim 8, characterized in that: An expansion air bag is arranged at the connection between the top of the inner cavity of the damper body and the piston rod, one side of the expansion air bag is connected with an air pipe, the bottom of the air pipe passes through the sealing ring and is fixed with an air nozzle.

10. A vibration reduction system, characterized in that: The vibration reduction system comprises a hydraulic damper as claimed in any one of claims 1 to 9.

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