Oil damper

Abstract

The utility model relates to an oil damper which is located in a vehicle body, an external control oil source is arranged on the vehicle body, and the oil damper comprises an oil cylinder, an oil storage cylinder, a middle cylinder and a piston cylinder, the piston assembly comprises a piston rod and a piston body, and the piston body is located in the piston cylinder; one end of the piston rod is connected with the piston body, and the other end of the piston rod extends to penetrate through the first cavity, penetrates out of the piston cylinder, the middle cylinder and the oil storage cylinder and is connected with a vehicle body. The bottom valve assembly is located between the piston cylinder and the oil cylinder base, one side of the bottom valve assembly is connected with one end of the piston cylinder and communicated with the second cavity, and the other side of the bottom valve assembly is connected with the oil cylinder base and communicated with the oil storage cavity. The oil conveying assembly is located at one end of the oil storage cylinder and communicates with an external control oil source, the oil storage cavity, the first cavity and the second cavity. The pressure sensor is arranged at the joint of the oil conveying assembly and the oil storage cavity and communicates with oil. The structure of the oil damper is optimized, and internal oil is flexibly controlled to enter and exit, so that the requirement of a vehicle for complex and variable damping force is met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rail transit technical field, especially relate to an oil pressure shock absorber. BACKGROUND

[0002] When the vehicle runs on uneven road, the vehicle will produce bumping, causing the passengers to have a bad experience. At present, a shock absorber is arranged between the wheel and the vehicle body to buffer the bumping.

[0003] The prior art (CN112112919A) discloses an electromagnetic valve shock absorber, which comprises an oil storage cylinder, a working cylinder, a piston rod, an intermediate cylinder, a compression valve and an electromagnetic valve. The compression valve is fixedly arranged at the lower end inside the oil storage cylinder. The working cylinder is coaxially sleeved in the oil storage cylinder. The lower end of the working cylinder abuts against the compression valve, and the upper end of the working cylinder is sealingly connected with the oil storage cylinder. The intermediate cylinder is sealingly sleeved outside the working cylinder and located in the oil storage cylinder. The piston rod is axially slidingly arranged in the working cylinder. The lower end of the piston rod is provided with a piston valve. The upper end of the piston rod extends out of the working cylinder and the oil storage cylinder. A flow valve core is arranged at the second communication hole. An electromagnetic valve is arranged outside the oil storage cylinder. The valve rod of the electromagnetic valve is correspondingly arranged at the end close to the second flow guide cavity. In order to ensure that the piston rod axially slides in the working cylinder, a guide is arranged at the upper end in the oil storage cylinder.

[0004] However, in the related art, only fixed damping force can be set. In the case of complex working conditions, the demand of the vehicle for damping force also becomes complex and variable, and the fixed damping force cannot meet such complex demand. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies in the related art, the utility model provides an oil pressure shock absorber, which optimizes the structure of the oil pressure shock absorber and can flexibly control the in-out of the internal oil to meet the complex and variable demand of the vehicle for damping force.

[0006] The utility model provides an oil pressure shock absorber, which is characterized by being located inside a vehicle body, an external control oil source being arranged on the vehicle body, and comprising:

[0007] An oil cylinder comprises an oil cylinder base, an oil storage cylinder, an intermediate cylinder and a piston cylinder. The intermediate cylinder and the oil storage cylinder are sequentially and outwardly sleeved outside the piston cylinder. An oil storage cavity is formed between the oil storage cylinder and the intermediate cylinder. Oil is arranged in the oil storage cavity and the piston cylinder. One end of the oil storage cylinder and one end of the intermediate cylinder are connected with one side of the oil cylinder base. The other side of the oil cylinder base is connected with the vehicle body.

[0008] The piston assembly includes a piston rod and a piston body. The piston body is located inside the piston cylinder and divides the interior of the piston cylinder into a first chamber and a second chamber. A first damping valve is provided on the side of the piston body near the first chamber, and a second damping valve is provided on the side of the piston body near the second chamber. The first chamber and the second chamber are connected to each other through the first damping valve and the second damping valve. One end of the piston rod is connected to the piston body, and the other end of the piston rod extends through the first chamber, exits to the outside of the piston cylinder, the intermediate cylinder and the oil reservoir, and is connected to the vehicle body.

[0009] The bottom valve assembly is located between the piston cylinder and the oil cylinder base. One side of the bottom valve assembly is connected to one end of the piston cylinder and communicates with the second chamber, while the other side is connected to the oil cylinder base and communicates with the oil storage chamber.

[0010] The oil delivery assembly is located at one end of the oil storage cylinder and connects to an external control oil source and the oil storage chamber, the first chamber, and the second chamber.

[0011] The pressure sensor is located at the connection between the oil delivery assembly and the oil storage chamber, and is connected to the oil.

[0012] Through the design of multi-stage hydraulic cylinders and the arrangement of damping valves, vibrations can be effectively absorbed, improving the stability of vehicle operation.

[0013] In some embodiments, the hydraulic damper includes at least one set of oil delivery components, the oil delivery components including: an electromagnetic control valve, an external oil delivery pipe, and an internal oil delivery pipe;

[0014] Among them, the external oil supply pipe is located on the outside of the cylinder base and connects the external control oil source and the internal oil supply pipe;

[0015] The internal oil supply pipe is located inside the cylinder base and connects the oil storage chamber, the first chamber, and the second chamber.

[0016] The electromagnetic control valve is located outside the cylinder base and connects the inner oil supply pipe and the cylinder base. The oil passage from the cylinder base and the inner oil supply pipe to the first and second chambers is connected through the electromagnetic control valve.

[0017] By controlling the flow of oil according to actual needs, the damping characteristics of the shock absorber can be adjusted in real time, further improving the comfort and handling of the vehicle.

[0018] In some embodiments, the hydraulic damper includes two sets of oil delivery components, which are symmetrically arranged on both sides of the cylinder base.

[0019] The symmetrically arranged oil delivery component structure significantly improves the shock absorber's response speed and the uniformity of oil distribution, making it suitable for use in high-performance vehicles or special environments.

[0020] In some embodiments, the hydraulic damper further includes:

[0021] The dustproof cylinder is sleeved outside the oil storage cylinder, one end of the dustproof cylinder is connected to the oil storage cylinder, and the other end is connected to the extending end of the piston rod through the first cavity.

[0022] The dustproof cylinder has simple structure, effectively improves the durability of the shock absorber in harsh environment, and reduces the maintenance frequency.

[0023] In some embodiments, the oil pressure shock absorber further comprises:

[0024] Two connectors, one connector is connected to the dustproof cylinder, and the other connector is connected to the oil cylinder base;

[0025] The piston rod is connected to the vehicle body through one connector, and the oil cylinder base is connected to the vehicle body through the other connector.

[0026] Through the arrangement of the connector, the installation flexibility and operation stability of the oil pressure shock absorber are further improved.

[0027] In some embodiments, the bottom valve assembly further comprises:

[0028] The bottom valve mounting seat is located between the piston cylinder and the oil cylinder base, one side is connected to the end of the piston cylinder close to the oil cylinder base, and the other side is connected to the oil cylinder base;

[0029] The third damping valve is located on the bottom valve mounting seat and communicates the oil storage cavity and the second cavity.

[0030] The bottom valve assembly effectively improves the controllability of oil flow by setting the third damping valve, so that the performance of the shock absorber is more stable.

[0031] In some embodiments, the bottom valve assembly further comprises:

[0032] The check valve is arranged on the bottom valve mounting seat and located on the side of the third damping valve;

[0033] The oil path from the oil storage cavity to the second cavity is open through the check valve, and the oil path from the second cavity to the oil storage cavity is closed.

[0034] The setting of the check valve avoids the vibration and performance decline caused by the reverse flow of oil, and improves the working efficiency and reliability of the shock absorber.

[0035] In some embodiments, the oil pressure shock absorber further comprises a sealing assembly located between the piston rod and the oil cylinder, the sealing assembly is connected to the end of the piston rod, the end of the piston cylinder away from the oil cylinder base, the end of the intermediate cylinder away from the oil cylinder base and the end of the oil storage cylinder away from the oil cylinder base respectively; the sealing assembly, the piston cylinder and the piston body jointly form the first cavity, and the sealing assembly, the oil storage cylinder, the intermediate cylinder and the oil cylinder base jointly form the oil storage cavity.

[0036] The sealing assembly effectively improves the sealing performance of the shock absorber and enhances the durability of the system.

[0037] In some embodiments, the closed assembly comprises:

[0038] A guide is arranged between the piston rod, the end of the piston cylinder away from the oil cylinder base, the end of the intermediate cylinder away from the oil cylinder base and the end of the oil storage cylinder away from the oil cylinder base;

[0039] A sealing element is arranged between the guide and the piston rod, and is annular, with the inner side sleeved on the outer side of the piston rod and the outer side connected to the guide;

[0040] A fixing element is arranged between the guide and the oil storage cylinder, and the fixing element is connected to the guide and the oil storage cylinder respectively.

[0041] The layered design of the closed assembly further improves the sealing and smooth operation of the shock absorber, and prolongs the service life of the key components.

[0042] In some embodiments, a gap is arranged between the intermediate cylinder and the piston cylinder, and a through hole is arranged in the guide at a position connected to the first cavity, and the through hole is in communication with the gap between the intermediate cylinder and the piston cylinder.

[0043] The through hole design provides an additional oil passage, so that the shock absorber can better adapt to different loads, thereby improving the overall damping effect and operation stability.

[0044] Based on the above technical scheme, in the process of stretching or compressing the first cavity and the second cavity, the flow direction of the oil between the oil storage cavity, the first cavity and the second cavity is controlled by the plurality of damping valves and check valves to generate damping force, thereby absorbing the jolt vibration of the vehicle body. The oil source can be controlled externally by the oil delivery assembly to adjust the oil pressure, thereby meeting the complex and variable requirements of the vehicle for damping force. BRIEF DESCRIPTION OF DRAWINGS

[0045] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0046] Figure 1 It is a structural schematic diagram of one embodiment of the oil pressure shock absorber of the present application;

[0047] Figure 2 It is another structural schematic diagram of one embodiment of the oil pressure shock absorber of the present application.

[0048] In the drawings:

[0049] 1, oil cylinder; 2, connecting piece; 3, electromagnetic control valve; 4, pressure sensor; 5, outer oil pipe; 6, dustproof cylinder; 7, piston rod; 8, piston body; 9, first damping valve; 10, second damping valve; 11, oil storage cylinder; 12, intermediate cylinder; 13, piston cylinder; 1301, first cavity; 1302, second cavity; 14, fixing piece; 15, guide piece; 16, sealing piece; 17, third damping valve; 18, check valve; 19, bottom valve mounting seat; 20, inner oil pipe; 21, oil cylinder base. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0051] In the description of the present application, it should be understood that the terms "center", "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0052] The terms "first", "second", "third" are only for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include one or more of the features.

[0053] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] As shown in the accompanying drawings Figure 1 and Figure 2 As shown in the accompanying drawings

[0055] The oil cylinder 1 includes an oil cylinder base 21, an oil storage cylinder 11, an intermediate cylinder 12, and a piston cylinder 13. The piston cylinder 13 is externally sequentially sleeved with the intermediate cylinder 12 and the oil storage cylinder 11, and an oil storage cavity is formed between the oil storage cylinder 11 and the intermediate cylinder 12. The oil storage cavity and the interior of the piston cylinder 13 are both provided with oil liquid. One end of the oil storage cylinder 11 and one end of the intermediate cylinder 12 are both connected with one side of the oil cylinder base 21, and the other side of the oil cylinder base 21 is connected with a vehicle body.

[0056] The piston assembly includes a piston rod 7 and a piston body 8. The piston body 8 is located in the piston cylinder 13 and divides the piston cylinder 13 into a first cavity 1301 and a second cavity 1302. A first damping valve 9 is arranged on one side of the piston body 8 close to the first cavity 1301, and a second damping valve 10 is arranged on the other side of the piston body 8 close to the second cavity 1302. The first cavity 1301 and the second cavity 1302 are connected with each other through the first damping valve 9 and the second damping valve 10. One end of the piston rod 7 is connected with the piston body 8, and the other end of the piston rod 7 extends through the first cavity 1301, penetrates out to the outside of the piston cylinder 13, the intermediate cylinder 12, and the oil storage cylinder 11, and is connected with the vehicle body.

[0057] The bottom valve assembly is located between the piston cylinder 13 and the oil cylinder base 21. One side of the bottom valve assembly is connected with one end of the piston cylinder 13 and communicates with the second cavity 1302, and the other side of the bottom valve assembly is connected with the oil cylinder base 21 and communicates with the oil storage cavity.

[0058] The oil delivery assembly is located at one end of the oil storage cylinder 11 and communicates with an external control oil source and the oil storage cavity, the first cavity 1301, and the second cavity 1302.

[0059] The pressure sensor 4 is arranged at the connection between the oil delivery assembly and the oil storage cavity and communicates with the oil liquid.

[0060] During vehicle driving, the piston rod 7 drives the piston body 8 to move up and down in the piston cylinder 13, changes the volumes of the first cavity 1301 and the second cavity 1302, forces the oil liquid to pass through the first damping valve 9 and the second damping valve 10, and thus generates a damping force to absorb vibration.

[0061] The bottom valve assembly realizes the flow balance of the oil liquid between the oil storage cavity and the second cavity 1302. The oil delivery assembly adjusts the oil liquid pressure and flow through the external control oil source to adapt to the damping requirements in different road conditions. The pressure sensor 4 monitors the oil liquid pressure in real time to ensure the normal operation of the system.

[0062] Through the multi-stage oil cylinder 1 design and the arrangement of the damping valves, the vibration can be effectively absorbed, and the stability of vehicle driving can be improved. The application of the external control oil source and the oil delivery assembly makes the damper have flexibility to adapt to different working conditions. The real-time monitoring of the pressure sensor 4 improves the reliability and safety of the system.

[0063] The oil storage cylinder 11, the intermediate cylinder 12 and the piston cylinder 13 are all hollow cylindrical and coaxially sleeved together. The oil storage cylinder 11 is at a preset interval from the intermediate cylinder 12. A gap is arranged between the intermediate cylinder 12 and the piston cylinder 13.

[0064] The piston body 8 is connected with the piston rod 7 through threads.

[0065] The type of the first damping valve 9 or the second damping valve 10 can be set according to the required damping force, such as a one-way valve or an adjustable valve.

[0066] The installation position of the pressure sensor 4 can be in the oil storage cavity, the first cavity 1301 or the second cavity 1302, which is determined according to the monitoring requirement.

[0067] In some embodiments, at least one set of oil delivery assembly is included, and the oil delivery assembly includes: an electromagnetic control valve 3, an outer oil delivery pipe 5 and an inner oil delivery pipe 20.

[0068] The outer oil delivery pipe 5 is located outside the oil cylinder base 21 and is connected with the external control oil source and the inner oil delivery pipe 20.

[0069] The inner oil delivery pipe 20 is located inside the oil cylinder base 21 and is connected with the oil storage cavity, the first cavity 1301 and the second cavity 1302.

[0070] The electromagnetic control valve 3 is located outside the oil cylinder base 21 and is connected with the inner oil delivery pipe 20 and the oil cylinder base 21, and the oil path from the oil cylinder base 21, the inner oil delivery pipe 20 to the first cavity 1301 and the second cavity 1302 is conducted through the electromagnetic control valve 3.

[0071] The oil liquid of the external control oil source is delivered to the inner oil delivery pipe 20 through the outer oil delivery pipe 5, and then the oil liquid flows into the oil storage cavity, the first cavity 1301 or the second cavity 1302 by adjusting the electromagnetic control valve 3. The opening and closing of the electromagnetic control valve 3 can be adjusted by the external electric control signal to realize the precise control of the oil pressure, so as to adjust the damping characteristics of the shock absorber.

[0072] The embodiment provides a flexible oil liquid flow path through the combination of the electromagnetic control valve 3 and the oil delivery pipe, can control the oil liquid flow direction according to the actual requirement, realizes the real-time adjustment of the damping characteristics of the shock absorber, and further improves the comfort and maneuverability of the vehicle.

[0073] The electromagnetic control valve 3 can be set as a proportional valve or a switch valve.

[0074] The arrangement mode of the inner oil delivery pipe 20 can be adjusted as embedded or external, so as to adapt to different oil cylinder 1 structures.

[0075] During the operation of the electromagnetic control valve, the oil liquid passes through the outer oil pipe and the inner oil pipe to the oil cylinder base in sequence, passes through the inner oil pipe from the oil cylinder base to the electromagnetic control valve, and then passes through the inner oil pipe from the electromagnetic control valve to the first cavity 1301 or the second cavity 1302.

[0076] In some embodiments, the oil pressure shock absorber comprises two groups of output assemblies, and the two groups of oil delivery assemblies are symmetrically arranged on both sides of the oil cylinder base 21.

[0077] The two groups of symmetrically arranged oil delivery assemblies work simultaneously or alternately, further optimizing the flow distribution and control accuracy of the oil liquid, avoiding performance fluctuations caused by insufficient unilateral oil delivery, and ensuring the reliability of the shock absorber under high load working conditions.

[0078] The symmetrically arranged oil delivery assembly structure significantly improves the response speed and uniformity of oil distribution of the shock absorber, and is suitable for high-performance vehicles or special environments.

[0079] The extension end of the pressure sensor 4 is fixed outside the oil cylinder base 21, which is convenient for equipment maintenance and inspection.

[0080] The oil delivery assembly is integrated outside the oil cylinder base 21 for replacement or maintenance.

[0081] The extension end of the pressure sensor 4, the outer oil pipe 5 and the inner oil pipe 20 are all connected to the outside of the oil cylinder base 21 by threads.

[0082] The symmetric position of the oil delivery assembly can be adjusted according to the specific shape of the oil cylinder base 21, including but not limited to symmetrical or inclined arrangement.

[0083] The number of electromagnetic control valves 3 can be increased or decreased according to actual needs to enhance the control ability.

[0084] In some embodiments, it also includes:

[0085] The dustproof cylinder 6 is sleeved outside the oil storage cylinder 11, one end of the dustproof cylinder 6 is connected to the oil storage cylinder 11, and the other end is connected to the extension end of the piston rod 7 through the first cavity 1301.

[0086] The dustproof cylinder 6 effectively prevents dust, sand and moisture from entering the inside of the shock absorber by covering the outside of the oil storage cylinder 11 and the piston rod 7, prolonging the service life of the equipment.

[0087] The dustproof cylinder 6 has a simple structure, effectively improves the durability of the shock absorber in harsh environments, and reduces the maintenance frequency.

[0088] The length and diameter of the dustproof cylinder 6 can be adjusted according to the length and movement range of the piston rod 7 and the size of the oil storage cylinder 11.

[0089] In some embodiments, further comprising:

[0090] Two connectors 2, one connector 2 is connected to the dustproof cylinder 6, and the other connector 2 is connected to the oil cylinder base 21;

[0091] Wherein, the piston rod 7 is connected to the vehicle body through one connector 2, and the oil cylinder base 21 is connected to the vehicle body through the other connector 2.

[0092] The oil pressure damper is fixed in the vehicle body through the two connectors 2, which makes the overall installation of the damper more stable, and provides necessary buffering and support. Through the arrangement of the connectors 2, the installation flexibility and operation stability of the oil pressure damper are further improved.

[0093] The connector 2 can be connected to the vehicle body in a threaded connection, buckle connection or welding manner.

[0094] The connector 2 can be provided in a circular ring shape. The shape and size of the connector 2 can be customized according to the design of the vehicle body to adapt to different vehicle models.

[0095] In some embodiments, the bottom valve assembly further comprises:

[0096] The bottom valve mounting seat 19 is located between the piston cylinder 13 and the oil cylinder base 21, and is connected to one side of the piston cylinder 13 near the end of the oil cylinder base 21 and the other side of the oil cylinder base 21.

[0097] The third damping valve 17 is located on the bottom valve mounting seat 19 and communicates the oil storage cavity and the second cavity 1302.

[0098] When the oil flows from the oil storage cavity to the second cavity 1302, the third damping valve 17 provides appropriate damping force to balance the oil flow rate and pressure, ensuring the stability of the damper in dynamic response. The bottom valve assembly effectively improves the controllability of oil flow by setting the third damping valve 17, making the performance of the damper more stable.

[0099] The third damping valve 17 can be provided at the center of the bottom valve mounting seat 19.

[0100] The third damping valve 17 includes but is not limited to a fixed orifice valve or an adjustable orifice valve to meet different damping requirements.

[0101] In some embodiments, the bottom valve assembly further comprises:

[0102] The check valve 18 is provided on the bottom valve mounting seat 19 and located on the side of the third damping valve 17.

[0103] Wherein, the oil passage from the oil storage cavity to the second cavity 1302 is open through the check valve 18, and the oil passage from the second cavity 1302 to the oil storage cavity is closed.

[0104] The unidirectional property of the check valve 18 ensures the flow direction between the oil storage cavity and the second cavity 1302 is controlled, further improving the stability of the system. The setting of the check valve 18 avoids the vibration and performance decline caused by the reverse flow of oil, improves the working efficiency and reliability of the shock absorber.

[0105] The structure of the check valve 18 can adopt a ball valve, a flapper valve or a spring valve to meet different installation requirements.

[0106] The position of the check valve 18 can be adjusted to other areas of the spool valve mounting seat 19, and optimized according to the oil circuit design.

[0107] During the stretching process of the hydraulic shock absorber, the piston rod 7 drives the piston body 8 to move towards the closing assembly, the pressure in the first cavity 1301 increases, part of the oil in the first cavity 1301 flows into the second cavity 1302 through the first damping valve 9, and part of the oil in the oil storage cavity flows into the second cavity 1302 through the check valve 18.

[0108] During the compression process of the hydraulic shock absorber, the piston rod 7 drives the piston body 8 to move towards the oil cylinder base, the pressure in the second cavity 1302 increases, part of the oil in the second cavity 1302 flows into the first cavity 1301 through the second damping valve 10, and part of the oil in the second cavity 1302 flows into the oil storage cavity through the third damping valve.

[0109] A compensation air bag can be arranged in the oil storage cavity, or a part of air is reserved. When the oil in the oil storage cavity flows out, the compensation air bag expands.

[0110] In some embodiments, a closing assembly is further included, located between the piston rod 7 and the oil cylinder 1, and connected to the piston rod 7, the end of the piston cylinder 13 away from the oil cylinder base 21, the end of the intermediate cylinder 12 away from the oil cylinder base 21 and the end of the oil storage cylinder 11 away from the oil cylinder base 21 respectively; the closing assembly, the piston cylinder 13 and the piston body 8 enclose the first cavity 1301, and the closing assembly, the oil storage cylinder 11, the intermediate cylinder 12 and the oil cylinder base 21 enclose the oil storage cavity.

[0111] The closing assembly seals the first cavity 1301 and the oil storage cavity, ensures the stable circulation of oil in the shock absorber, and prevents foreign matter from entering. The closing assembly effectively improves the sealing performance of the shock absorber and enhances the durability of the system.

[0112] In some embodiments, the closing assembly comprises:

[0113] The guide 15 is located between the piston rod 7 and the oil storage cylinder 11, and is connected to the piston rod 7, the end of the piston cylinder 13 away from the oil cylinder base 21, the end of the intermediate cylinder 12 away from the oil cylinder base 21 and the end of the oil storage cylinder 11 away from the oil cylinder base 21.

[0114] The seal 16 is located between the guide 15 and the piston rod 7, and is annular in shape. Its inner side is fitted onto the outside of the piston rod 7, and its outer side is connected to the guide 15.

[0115] The fixing member 14 is located between the guide member 15 and the oil reservoir 11, and the fixing member 14 connects the guide member 15 and the oil reservoir 11 respectively.

[0116] The guide member 15 provides support and guidance for the piston rod 7, while the seal member 16 prevents oil leakage and allows the piston rod 7 to move freely. The fixing member 14 secures the guide member 15 to the oil reservoir 11 by mechanical connection to prevent loosening due to vibration.

[0117] The layered design of the enclosed components further improves the sealing performance and operational smoothness of the shock absorber, while extending the service life of key components.

[0118] The shape and material of the seal 16 can be selected according to the type of oil and the operating temperature, and it can be set as an O-ring.

[0119] The fastener 14 can be connected by welding, snap-fit, or thread. The fastener 14 includes a lock nut.

[0120] The fixing member 14 is connected to the oil reservoir 11 by a thread.

[0121] The piston rod 7 can be displaced in the middle of the seal 16.

[0122] In some embodiments, a gap is provided between the intermediate cylinder 12 and the piston cylinder 13, and a through hole is provided in the guide member 15 at the position connected to the first cavity 1301, the through hole connecting the gap between the intermediate cylinder 12 and the piston cylinder 13.

[0123] Through the through-hole on the guide member 15, oil can flow from the first chamber 1301 of the piston cylinder 13 into the gap between the intermediate cylinder 12 and the piston cylinder 13, or flow back from the gap into the first chamber 1301. This structure helps to balance the oil pressure in the cylinder 1 and prevent performance degradation caused by air bubbles or excessive local pressure. The through-hole design provides additional oil passages, enabling the damper to better adapt to different loads, thereby improving the overall damping effect and operational stability.

[0124] The shape and number of through holes can be adjusted according to the oil flow requirements of the shock absorber, including setting them as circular holes or groove-shaped holes.

[0125] The width of the gap can be adjusted according to the specific diameter and material properties of the hydraulic cylinder 1 to balance strength and fluidity.

[0126] The position of the through hole can be moved up or down as appropriate to optimize the oil flow path.

[0127] From the description of the multiple embodiments of the oil pressure shock absorber of the utility model, it can be seen that the embodiments of the oil pressure shock absorber of the utility model have at least one or more of the following advantages:

[0128] 1. The flow direction of the oil between the oil storage cavity, the first cavity and the second cavity is controlled by multiple damping valves and check valves, a damping force is generated, and the jolt vibration of the vehicle body is absorbed.

[0129] 2. The oil source can be controlled externally by the oil delivery assembly to adjust the oil pressure, thereby meeting the complex and variable demand of the vehicle for the damping force.

[0130] Finally, it should be noted that: the various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts of each embodiment can be referred to.

[0131] The above embodiments are only used to illustrate the technical solutions of the utility model and not to limit them. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific embodiments of the utility model can be modified or some technical features can be replaced equivalently without departing from the spirit of the technical solutions of the utility model. They should be covered in the technical solution range of the utility model claimed.

Claims

1. An oil pressure damper characterized by comprising: The oil source is controlled from outside of the vehicle body, comprising: a cylinder, including a cylinder base, an oil storage cylinder, an intermediate cylinder and a piston cylinder, the piston cylinder is sequentially covered by the intermediate cylinder and the oil storage cylinder from outside to outside, the oil storage cavity is formed between the oil storage cylinder and the intermediate cylinder, the oil storage cavity and the piston cylinder are both provided with oil, one end of the oil storage cylinder and one end of the intermediate cylinder are connected with one side of the cylinder base, the other side of the cylinder base is connected with the vehicle body; a piston assembly, including a piston rod and a piston body, the piston body is located in the piston cylinder, the piston body divides the piston cylinder into a first cavity and a second cavity, a first damping valve is arranged on one side of the piston body close to the first cavity, a second damping valve is arranged on one side of the piston body close to the second cavity, the first cavity and the second cavity are communicated through the first damping valve and the second damping valve; one end of the piston rod is connected with the piston body, the other end of the piston rod extends through the first cavity, and extends to the outside of the piston cylinder, the intermediate cylinder and the oil storage cylinder, and is connected with the vehicle body; a bottom valve assembly, located between the piston cylinder and the cylinder base, one end of the piston cylinder is connected with one side of the bottom valve assembly, and the second cavity is communicated, the other side of the bottom valve assembly is connected with the cylinder base, and the oil storage cavity is communicated; an oil delivery assembly, located at one end of the oil storage cylinder, and communicating the external control oil source, the oil storage cavity, the first cavity and the second cavity; a pressure sensor, arranged at the connection between the oil delivery assembly and the oil storage cavity, and communicating the oil.

2. The oil damper according to claim 1, characterized by The oil delivery assembly includes at least one set of electromagnetic control valve, outer oil delivery pipe and inner oil delivery pipe. The outer oil delivery pipe is located outside the cylinder base, and communicates the external control oil source and the inner oil delivery pipe. The inner oil delivery pipe is located inside the cylinder base, and communicates the oil storage cavity, the first cavity and the second cavity. The electromagnetic control valve is located outside the cylinder base, and communicates the inner oil delivery pipe and the cylinder base, and the oil path from the cylinder base, the inner oil delivery pipe to the first cavity and the second cavity is conducted through the electromagnetic control valve.

3. The oil damper according to claim 2, characterized by The oil delivery assembly includes two sets of electromagnetic control valve, outer oil delivery pipe and inner oil delivery pipe, which are symmetrically arranged on both sides of the cylinder base.

4. The oil damper according to claim 1, characterized by Further comprising: a dustproof cylinder, which is sleeved outside the oil storage cylinder, one end of the dustproof cylinder is connected with the oil storage cylinder, and the other end of the dustproof cylinder is connected with the extended end of the piston rod through the first cavity.

5. The oil damper according to claim 4, characterized in that Further comprising: two connecting members, one connecting member is connected with the dustproof cylinder, and the other connecting member is connected with the cylinder base. The piston rod is connected with the vehicle body through one connecting member, and the cylinder base is connected with the vehicle body through the other connecting member.

6. The oil damper according to claim 1, characterized by The bottom valve assembly further comprises: a bottom valve mounting seat, which is located between the piston cylinder and the cylinder base, one side of the bottom valve mounting seat is connected with one end of the piston cylinder close to the cylinder base, and the other side of the bottom valve mounting seat is connected with the cylinder base; a third damping valve, which is located on the bottom valve mounting seat and communicates the oil storage cavity and the second cavity.

7. The oil damper according to claim 6, characterized in that The bottom valve assembly further comprises: a check valve, which is arranged on the bottom valve mounting seat and located on the side of the third damping valve; The oil path from the oil storage cavity to the second cavity is conducted through the check valve, and the oil path from the second cavity to the oil storage cavity is closed.

8. The oil damper according to claim 1, characterized by Further comprising a sealing assembly located between the piston rod and the cylinder, the sealing assembly is connected with one end of the piston rod, one end of the piston cylinder away from the cylinder base, one end of the intermediate cylinder away from the cylinder base and one end of the oil storage cylinder away from the cylinder base, respectively; the sealing assembly, the piston cylinder and the piston body jointly form the first cavity, and the sealing assembly, the oil storage cylinder, the intermediate cylinder and the cylinder base jointly form the oil storage cavity.

9. The oil damper according to claim 8, characterized in that The sealing assembly comprises: A guide is arranged between the piston rod and the oil storage cylinder, and is connected to the piston rod, the end of the piston cylinder away from the oil cylinder base, the end of the intermediate cylinder away from the oil cylinder base, and the end of the oil storage cylinder away from the oil cylinder base; A sealing element is arranged between the guide and the piston rod, and is annular, with the inner side being sleeved on the outside of the piston rod and the outer side being connected to the guide; A fixing element is arranged between the guide and the oil storage cylinder, and the fixing element is connected to the guide and the oil storage cylinder respectively.

10. The oil damper according to claim 9, characterized in that A gap is arranged between the intermediate cylinder and the piston cylinder, and a through hole is arranged in the guide at a position connected to the first cavity, and the through hole communicates the gap between the intermediate cylinder and the piston cylinder.

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