Shock absorbers, hydraulic systems and operating machinery and equipment

Abstract

The present invention provides a shock absorber, a hydraulic system and an operating mechanical device. The shock absorber includes: a cylinder body having a cavity; a piston, which is arranged in the cavity and divides the cavity into a first inner cavity and a second inner cavity; an elastic member, which is arranged in the first inner cavity and connected to the piston and the cylinder body; and a flow regulating valve group; wherein the first inner cavity is unidirectionally conducted outward through the flow regulating valve group, and the flow regulating valve group is used to limit the flow area of ​​the fluid medium entering the first inner cavity, and the second inner cavity is used to fill the working medium. The present invention enables the working medium hydraulic oil to slowly enter the hydraulic system without causing new pressure shocks to the hydraulic oil return pipeline, and the oil return is more stable.

Description

Technical Field

[0001] The present application relates to the technical field of hydraulic control systems, and in particular to a shock absorber, a hydraulic system and an operating mechanical device. Background Art

[0002] In the related technology, the reversing valve is used in the hydraulic system. When the control valve is switched, a large pressure shock will be generated. For example, in the return oil pipeline, the pressure shock generated by the reversing valve will directly act on the radiator, return oil filter and other low-pressure components, which will shorten the service life of the low-pressure components and cause equipment failure. Summary of the invention

[0003] The embodiments according to the present invention are intended to solve or improve at least one of the above technical problems.

[0004] A first object of an embodiment of the present invention is to provide a shock absorber.

[0005] A second object of an embodiment of the present invention is to provide a hydraulic system.

[0006] A third object of an embodiment of the present invention is to provide a working machine.

[0007] To achieve the first purpose of an embodiment of the present invention, a shock absorber is provided, comprising: a cylinder body having a cavity; a piston, disposed in the cavity and dividing the cavity into a first inner cavity and a second inner cavity; an elastic member, disposed in the first inner cavity and connected to the piston and the cylinder body; and a flow regulating valve group; wherein the first inner cavity is unidirectionally conducted to the outside through the flow regulating valve group, and the flow regulating valve group is used to limit the flow area of ​​the fluid medium entering the first inner cavity, and the second inner cavity is used to fill with the working medium.

[0008] In this technical solution, the second inner cavity is used to fill the working medium. When the system pressure shock occurs, the working medium enters the second inner cavity and acts on the piston. The elastic member is compressed by force, and the fluid medium in the first inner cavity flows out of the first inner cavity through the flow regulating valve group. Since the first inner cavity is unidirectionally conducted outward through the flow regulating valve group, the fluid medium in the first inner cavity can be quickly discharged, so the second inner cavity can quickly absorb the working medium to reduce the system shock. When the system pressure shock is eliminated, the elastic member stretches, and the flow regulating valve group performs flow regulation at this time. After the elastic member begins to stretch, a negative pressure is formed in the first inner cavity. Since the flow regulating valve group is used to limit the flow area of ​​the fluid medium entering the first inner cavity, the fluid medium slowly enters the first inner cavity under the action of throttling, the speed of the elastic member stretching is reduced, the piston moves slowly, and the working medium in the second inner cavity slowly flows back, thereby avoiding new pressure shocks to the system circuit and improving the service life of the impact element.

[0009] In addition, the technical solution provided according to the embodiment of the present invention may also have the following additional technical features:

[0010] In the above technical solution, the flow regulating valve group includes: the flow regulating valve group is arranged on the cylinder body, the cylinder body includes the side wall of the first inner cavity, the flow regulating valve group includes: a flow hole, which is arranged on the side wall of the first inner cavity; a one-way valve, which is arranged in the flow hole, and the inlet end of the one-way valve is connected to the first inner cavity; and a flow limiting structure, which is arranged on the side wall of the first inner cavity, and the flow limiting structure is used to limit the flow area of ​​the fluid medium entering the first inner cavity.

[0011] In this technical solution, a circulation hole is provided on the gland, and the circulation hole can connect the external space and the first inner cavity. A one-way valve is provided in the circulation hole to allow the fluid medium to flow out of the first inner cavity. A flow limiting structure is provided on the gland, and is used to allow the fluid medium to enter the first inner cavity under the negative pressure state of the first inner cavity. The circulation hole is mainly used to install the one-way valve, and the one-way valve includes a spring and a sphere, wherein the sphere can block the passage between the circulation hole and the first inner cavity. In order to facilitate the installation of the one-way valve, the circulation hole extends to the outer surface of the gland in addition to extending to the first inner cavity. One end of the spring of the one-way valve is connected to the mounting seat, and the mounting seat is installed on the gland, and a sealing structure is provided between the mounting seat and the circulation hole to prevent leakage of the fluid medium.

[0012] In any of the above technical solutions, the flow limiting structure includes: an adjustable flow valve for adjusting the flow area of ​​the fluid medium entering the first inner cavity; or a damping hole for limiting the flow area of ​​the fluid medium entering the first inner cavity.

[0013] In this technical solution, the flow rate of the fluid medium entering the first inner cavity can be adjusted by an adjustable flow valve or a damping hole. Specifically, a damping hole can be set to achieve the effect of adjusting the flow rate of the fluid medium entering the first inner cavity. The diameter of the damping hole is smaller than the diameter of the circulation hole, and the damping hole and the circulation hole are respectively connected to the inlet and outlet through which the fluid medium passes, that is, the damping hole and the circulation hole form a parallel structure, which ensures that the damping hole can make the fluid medium flow into the first inner cavity when the first inner cavity is in a negative pressure working state. The diameter of the damping hole is smaller than the diameter of the circulation hole, and the damping hole and the circulation hole are respectively connected to the inlet and outlet through which the fluid medium passes, that is, the damping hole and the circulation hole form a parallel structure, which ensures that the damping hole can make the fluid medium flow into the first inner cavity when the first inner cavity is in a negative pressure working state. The damping hole can be replaced by an adjustable flow valve, and the function of the adjustable flow valve is equivalent to that of the damping hole, which will not be repeated here.

[0014] In any of the above technical solutions, the cylinder body also includes: a first flow port, arranged on the side wall of the first inner cavity, for allowing the fluid medium to flow in and out of the first inner cavity; wherein, a flow regulating valve group is arranged in the first flow port, and the flow regulating valve group can make the first flow port and the first inner cavity communicate with each other.

[0015] In this technical solution, the first flow port is provided on the gland that constitutes part of the cylinder body, and is used for the flow of fluid medium, so that the fluid medium enters and exits the first inner cavity. Specifically, the gland has an outward protrusion, the first flow port penetrates the protrusion and is respectively connected with the damping hole and the flow hole, and the inner diameter of the first flow port is larger than the inner diameter of the flow hole, which can ensure that the fluid medium enters and exits the first inner cavity more smoothly through the first flow port.

[0016] In any of the above technical solutions, the flow regulating valve group is a solenoid valve for controlling the flow of the fluid medium into and out of the first inner cavity; or the flow regulating valve group is a one-way throttle valve, and the inlet end of the one-way throttle valve is connected to the first inner cavity.

[0017] In this technical solution, the damping hole and the one-way valve can be replaced by a solenoid valve. The solenoid valve is an automated basic component that uses electromagnetic control of fluid media. It belongs to an actuator and is not limited to hydraulic and pneumatic. It is used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium. The solenoid valve can be used in conjunction with different circuits to achieve the desired control, and the accuracy and flexibility of the control can be guaranteed. There are many types of solenoid valves, and different solenoid valves play a role in different positions of the control system, which will not be repeated here. By purchasing an external solenoid valve to control the flow of the fluid medium in and out of the first inner cavity, the structure can be simplified and the production efficiency of the shock absorber can be improved. The throttle valve is a valve that controls the flow of the fluid by changing the throttling section or throttling length. The throttle valve and the one-way valve can be combined into a one-way throttle valve by connecting them in parallel.

[0018] In any of the above technical solutions, the shock absorber further comprises: an oil groove, which is circumferentially arranged on the outer surface where the piston and the cylinder body are in contact with each other; wherein the oil groove is arranged in one or more portions.

[0019] In this technical solution, several oil grooves are processed on the outer wall of the piston, and the oil grooves are used as pressure equalizing grooves and sealing grooves. The function of the pressure equalizing grooves is to prevent the piston from getting stuck and to minimize the friction resistance. The function of the sealing grooves is to prevent a large amount of liquid in the second inner cavity from leaking into the first inner cavity. A small amount of leakage is allowed between the first inner cavity and the second inner cavity, which can increase the sensitivity of the piston movement.

[0020] In any of the above technical solutions, the cylinder body further includes: a second inner cavity side wall; a second flow port, provided on the second inner cavity side wall, for the working medium to flow so that the working medium enters and exits the second inner cavity.

[0021] In this technical solution, the second flow port can be used for the circulation of the working medium so that the working medium can enter and exit the second inner cavity. A protrusion is provided on the cylinder body, and the second flow port passes through the protrusion and is connected to the second inner cavity. The second flow port is provided to facilitate the working medium to enter and exit the second inner cavity.

[0022] To achieve the second purpose according to an embodiment of the present invention, a hydraulic system is provided, including: a shock absorber; a first hydraulic pipeline, one end of which is interconnected with the first inner cavity; a second hydraulic pipeline, one end of which is interconnected with the second inner cavity; and an oil tank; wherein the other end of the first hydraulic pipeline and the other end of the second hydraulic pipeline are respectively connected to the oil tank.

[0023] In this technical solution, the fluid medium is a liquid, and the other end of the working hydraulic pipeline extends into the oil tank containing the liquid. One end of the first hydraulic pipeline is interconnected with the first circulation port, and the other end of the working hydraulic pipeline extends into the oil tank, which is convenient for conveying the fluid medium. The working medium is the same as the fluid medium, both of which are liquids. One end of the second hydraulic pipeline is connected to the second circulation port, and the other end can be connected to the oil tank to more conveniently fill the second inner cavity with liquid or make the liquid more convenient to flow back to the oil tank. In addition, since the hydraulic system according to an embodiment of the present invention has a shock absorber according to any embodiment of the present invention, the hydraulic system according to an embodiment of the present invention has all the beneficial effects of the shock absorber according to any implementation of the present invention, which will not be repeated here.

[0024] In any of the above technical solutions, the hydraulic system further includes: an oil return pipeline; wherein the second hydraulic pipeline is connected to the oil tank through the oil return pipeline.

[0025] In this technical solution, by arranging the second hydraulic pipeline on the hydraulic circuit, the hydraulic oil on the hydraulic circuit is used as the working medium, which saves energy and simplifies the structure. In addition, by arranging the shock absorber on the hydraulic circuit of the reversing hydraulic system, the impact on the low-pressure element after reversing can be reduced.

[0026] To achieve the third purpose of an embodiment of the present invention, a working machinery equipment is provided, comprising: the shock absorber in any embodiment, the shock absorber is arranged in the hydraulic circuit of the working machinery equipment; or the hydraulic system in any embodiment.

[0027] In this technical solution, the operating machinery equipment according to the embodiment of the present invention has a shock absorber according to any embodiment of the present invention. Therefore, the operating machinery equipment according to the embodiment of the present invention has all the beneficial effects of the shock absorber according to any implementation of the present invention, which will not be repeated here.

[0028] Additional aspects and advantages of embodiments according to the present invention will become apparent in the following description or may be learned through practice of embodiments according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A longitudinal cross-sectional structural schematic diagram of an accumulator according to an embodiment of the related art;

[0030] Figure 2A schematic diagram of the structure of the use principle of an accumulator in an embodiment of the related art;

[0031] Figure 3 is one of the cross-sectional structural schematic diagrams of the shock absorber according to some embodiments of the present invention;

[0032] Figure 4 is a second schematic cross-sectional structural diagram of a shock absorber according to some embodiments of the present invention;

[0033] Figure 5 A schematic diagram of the principle structure of a hydraulic system according to some embodiments of the present invention;

[0034] Figure 6 This is one of the schematic diagrams of the composition of the working mechanical equipment according to some embodiments of the present invention;

[0035] Figure 7 This is the second schematic diagram of the composition of the operating mechanical equipment according to some embodiments of the present invention.

[0036] in, Figure 1 and Figure 2 The corresponding relationship between the reference numerals and component names in the figure is:

[0037] 100': spring accumulator, 110': cylinder structure, 112': air hole, 120': piston assembly, 130': oil tank, 140': atmosphere.

[0038] in, Figures 3 to 7 The corresponding relationship between the reference numerals and component names in the figure is:

[0039] 1: operating machinery and equipment; 10: hydraulic system; 100: shock absorber; 110: cylinder block; 112: cavity; 1122: first inner cavity; 1124: second inner cavity; 114: first inner cavity side wall; 116: first flow port; 118: second flow port; 119: second inner cavity side wall; 120: elastic piston assembly; 122: piston; 1222: outer surface; 124: oil groove; 126: elastic member; 130: flow regulating valve group; 132: flow hole; 134: one-way valve; 1342: inlet end; 136: flow limiting structure; 160: pressure cover; 170: mounting seat; 200: oil tank; 300: first hydraulic pipeline; 400: second hydraulic pipeline; 500: return oil pipeline; 20: hydraulic circuit. DETAILED DESCRIPTION

[0040] In order to more clearly understand the above-mentioned purposes, features and advantages of the embodiments of the present invention, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0041] In the following description, many specific details are set forth to facilitate a full understanding of the embodiments according to the present invention. However, the embodiments according to the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the embodiments according to the present invention is not limited to the specific embodiments disclosed below.

[0042] In the related art, many hydraulic systems use accumulators to absorb the pressure shock of the oil return line. Accumulators are divided into two types: gas-filled type and spring type. Figure 1 and Figure 2 The spring accumulator 100' shown in the figure comprises: a cylinder structure 110', which is a cavity structure, a piston assembly 120' including a tension spring, and the piston assembly 120' divides the cavity structure into two chambers, one of which is filled with hydraulic oil through an oil tank 130', and the oil is returned to the oil tank 130'. A tension spring is arranged in the other chamber, and an air hole 112' is opened on the side wall of the chamber, and the air hole 112' is connected to the atmosphere 140'. Figure 2 As shown, the working principle of the spring accumulator 100' is to use the compression and extension of the tension spring to store and release pressure energy. When the system pressure shock occurs, the tension spring compresses, absorbs the pressure shock and stores energy in the form of deformation of the tension spring. After the system pressure shock disappears, the tension spring of the spring accumulator 100' extends to release the previously stored energy.

[0043] Although the spring accumulator 100' in the related art can play a certain buffering role on the low-pressure parts, it still has the following disadvantages:

[0044] 1. When a system pressure shock occurs in the hydraulic system, the tension spring is compressed quickly, and when the system pressure shock disappears, the tension spring quickly extends. Because the extension time of the tension spring is very short, the tension spring can release a large amount of energy in a short time, thereby generating a new pressure shock on the hydraulic oil return line, affecting the stability of the hydraulic oil return.

[0045] 2. The spring accumulator 100' in the related art is divided into a working chamber and a first inner chamber 1122. The working chamber is connected to the hydraulic system, and the medium is hydraulic oil. The first inner chamber 1122 is connected to the atmosphere, and the medium is air. The working chamber and the first inner chamber 1122 are separated by a piston. To avoid leakage, the piston seal needs to have a large compression amount, and when the compression amount is large, the friction resistance is also large, which will affect the sensitivity of the spring accumulator 100' and it is more likely to get stuck.

[0046] 3. High-frequency pressure shocks can easily cause the piston seal to be damaged prematurely and cause hydraulic oil leakage.

[0047] Refer to the following Figures 3 to 7 The technical solutions according to some embodiments of the present invention are described.

[0048] Example 1

[0049] like Figure 3 As shown, this embodiment provides a shock absorber 100, including: a cylinder body 110, a piston 122, an elastic member 126 and a flow regulating valve group 130, the cylinder body 110 having a cavity 112; the piston 122, which is arranged in the cavity 112 and divides the cavity 112 into a first inner cavity 1122 and a second inner cavity 1124; the elastic member 126, which is arranged in the first inner cavity 1122 and connected to the piston 122 and the cylinder body 110; and the flow regulating valve group 130; wherein the first inner cavity 1122 is unidirectionally conducted to the outside through the flow regulating valve group 130, and the flow regulating valve group 130 is used to limit the flow area of ​​the fluid medium entering the first inner cavity 1122, and the second inner cavity 1124 is used to fill the working medium.

[0050] In this embodiment, the second inner cavity 1124 is used to fill the working medium, which can be gas or liquid, wherein the liquid can include hydraulic oil or water, etc. The piston 122 and the elastic member 126 constitute the elastic piston assembly 120, and one end of the cylinder body 110 is an open structure, in order to facilitate the installation of the elastic piston assembly 120 in the cavity, therefore, it is necessary to set a gland 160 at the open end of the cylinder body 110, so that the gland 160 can be used as a side wall of the cylinder body 110 that can be part of the first inner cavity 1122. The elastic piston assembly 120 is connected to the gland 160 at one end in the direction of elastic deformation, and at least a part of the other end is in contact with the side wall of the cavity. When the elastic piston assembly 120 generates elasticity under the action of external force, it can slide along the side wall.

[0051] The piston 122 is placed in the cavity 112 of the cylinder body 110, and the elastic member 126 can be a spring. The part of the piston 122 located in the first inner cavity 1122 has a protrusion to facilitate connection with one end of the elastic member 126, and the other end of the elastic member 126 is connected to the inner wall of the gland 160 located in the first inner cavity 1122. The elastic member 126 can ensure that the elastic piston assembly 120 generates energy when compressed or stretched by an external force. When the spring is compressed, the liquid in the first inner cavity 1122 quickly returns to the oil tank 200 through the one-way valve 134. When the spring is stretched, the one-way valve 134 is closed, and the liquid in the first inner cavity 1122 slowly enters the first inner cavity 1122 through the damping hole. Because negative pressure is formed in the first inner cavity 1122 when the spring is stretched, it is necessary to wait for the liquid to enter the first inner cavity 1122 from the damping hole before it can continue to stretch, thereby limiting the spring stretching speed, so that the energy is slowly released to avoid the formation of new pressure shocks.

[0052] When a system pressure shock occurs, the working medium enters the second inner cavity 1124 and acts on the piston 122. The elastic member 126 is compressed, and the liquid medium in the first inner cavity 1122 is discharged from the first inner cavity 1122 through the flow regulating valve group 130. Since the first inner cavity 1122 is unidirectionally conducted outward through the flow regulating valve group 130, the fluid medium in the first inner cavity 1122 can be quickly discharged, so the second inner cavity 1124 can quickly absorb the working medium to reduce the system shock. When the system pressure shock is eliminated, the elastic member 126 stores energy and is in a state to be stretched. At this time, the flow regulating valve group 130 performs flow regulation, and a negative pressure is formed in the first inner cavity 1122 after the elastic member 126 begins to stretch. Since the flow regulating valve group 130 is used to limit the flow area of ​​the fluid medium entering the first inner cavity 1122, the fluid medium slowly enters the first inner cavity 1122 under the action of throttling. At the same time, due to the effect of negative pressure, the extension speed of the elastic member 126 is reduced, causing the piston 122 to move slowly. Therefore, the working medium in the second inner cavity 1124 slowly flows back, thereby avoiding new pressure shocks to the system circuit and increasing the service life of the impacted component. The impacted component is generally a low-pressure component and is in a low-pressure position.

[0053] Example 2

[0054] like Figure 3 and Figure 4 As shown, this embodiment provides a shock absorber 100. In addition to the technical features of the above embodiment, this embodiment also includes the following technical features:

[0055] The flow regulating valve group 130 is arranged on the cylinder body 110, and the cylinder body 110 includes a first inner cavity side wall 114. The flow regulating valve group 130 includes: a flow hole 132, a one-way valve 134 and a flow limiting structure 136. The flow hole 132 is arranged on the first inner cavity side wall 114; the one-way valve 134 is arranged in the flow hole 132, and the inlet end 1342 of the one-way valve 134 is connected to the first inner cavity 1122; and the flow limiting structure 136 is arranged on the first inner cavity side wall 114, and the flow limiting structure 136 is used to limit the flow area of ​​the fluid medium entering the first inner cavity 1122.

[0056] In this embodiment, the gland 160 can serve as the first inner cavity side wall 114 of the cylinder body 110, the flow hole 132 is provided on the gland 160, the flow hole 132 can connect the external space and the first inner cavity 1122, and the one-way valve 134 is provided in the flow hole 132 to allow the fluid medium to flow out of the first inner cavity 1122. The flow limiting structure 136 is provided on the gland 160 to allow the fluid medium to enter the first inner cavity 1122 under the negative pressure state of the first inner cavity 1122. The flow hole 132 is mainly used to install the one-way valve 134, and the one-way valve 134 includes a spring and a ball, wherein the ball can block the passage between the flow hole 132 and the first inner cavity 1122. In order to facilitate the installation of the one-way valve 134, the flow hole 132 not only extends to the first inner cavity 1122, but also extends to the outside of the gland 160. One end of the spring of the one-way valve 134 is connected to the mounting seat 170, and the mounting seat 170 is installed on the gland 160. A sealing structure is set between the mounting seat 170 and the flow hole 132 to prevent leakage of the fluid medium. When the elastic piston assembly 120 is compressed under the impact of the working medium, the fluid medium in the first inner cavity 1122 will open the one-way valve 134 due to compression, so that the fluid medium flows out of the first inner cavity 1122 through the flow hole 132. When the fluid medium in the first inner cavity 1122 flows out of the first inner cavity 1122, the ball of the one-way valve 134 will block the passage between the flow hole 132 and the first inner cavity 1122, so that the fluid medium cannot enter the first inner cavity 1122 from the flow hole 132, thereby forming a negative pressure in the first inner cavity 1122. After the elastic piston assembly 120 is compressed, the elastic piston assembly 120 will store energy and thus extend again. At this time, the flow limiting structure 136 adjusts the flow rate so that the fluid medium slowly enters the first inner cavity 1122, thereby achieving the purpose of reducing the extension speed of the elastic piston assembly 120.

[0057] In this embodiment, the flow regulating valve group 130 can also be partially disposed on the first inner cavity side wall 114. For example, the flow limiting structure 136 is disposed on the first inner cavity side wall 114, and the one-way valve 134 is disposed outside the cylinder body 110. As long as the inlet end 1342 of the one-way valve 134 is connected to the first inner cavity 1122, the flow regulating valve group 130 can also be realized, which will not be described in detail here.

[0058] Example 3

[0059] like Figure 4 As shown, this embodiment provides a shock absorber 100. In addition to the technical features of the above embodiment, this embodiment also includes the following technical features:

[0060] The flow limiting structure 136 includes: an adjustable flow valve or a damping hole, the adjustable flow valve is used to adjust the flow area of ​​the fluid medium entering the first inner cavity 1122; or the damping hole is used to limit the flow area of ​​the fluid medium entering the first inner cavity 1122.

[0061] In this embodiment, the flow rate of the fluid medium entering the first inner cavity 1122 can be adjusted by an adjustable flow valve or a damping hole. Specifically, a damping hole can be provided to achieve the effect of adjusting the flow rate of the fluid medium entering the first inner cavity 1122. The diameter of the damping hole is smaller than the diameter of the flow hole 132, and the damping hole and the flow hole 132 are respectively connected to the inlet and outlet of the fluid medium, that is, the damping hole and the flow hole 132 form a parallel structure, which ensures that the damping hole can allow the fluid medium to flow into the first inner cavity 1122 when the first inner cavity 1122 is in a negative pressure working state.

[0062] The damping hole can be replaced by an adjustable flow valve. The function of the adjustable flow valve is equivalent to that of the damping hole, which will not be described in detail here.

[0063] Example 4

[0064] like Figure 4 As shown, this embodiment provides a shock absorber 100. In addition to the technical features of the above embodiment, this embodiment also includes the following technical features:

[0065] The cylinder body 110 also includes: a first flow port 116, which is arranged on the first inner cavity side wall 114 and is used to allow the fluid medium to flow in and out of the first inner cavity 1122; wherein, the flow regulating valve group 130 is arranged in the first flow port 116, and the flow regulating valve group 130 can make the first flow port 116 and the first inner cavity 1122 communicate with each other.

[0066] In this embodiment, the first flow port 116 is provided on the gland 160 constituting part of the cylinder body 110, and is used for the flow of fluid medium, so that the fluid medium enters and exits the first inner cavity 1122. Specifically, the gland 160 has an outward protrusion, and the first flow port 116 penetrates the protrusion and is respectively connected with the damping hole and the flow hole 132, and the inner diameter of the first flow port 116 is larger than the inner diameter of the flow hole 132, which can ensure that the fluid medium enters and exits the first inner cavity 1122 more smoothly through the first flow port 116.

[0067] Example 5

[0068] like Figure 3 and Figure 4 As shown, this embodiment provides a shock absorber 100. In addition to the technical features of the above embodiment, this embodiment also includes the following technical features:

[0069] The flow regulating valve group 130 is a solenoid valve for controlling the flow of the fluid medium into and out of the first inner cavity 1122 ; or the flow regulating valve group 130 is a one-way throttle valve, and the inlet end of the one-way throttle valve is connected to the first inner cavity 1122 .

[0070] In this embodiment, the damping hole and the one-way valve 134 can be replaced by a solenoid valve. The solenoid valve is an automated basic component that uses electromagnetic control of fluid media. It belongs to an actuator and is not limited to hydraulic and pneumatic. It is used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium. The solenoid valve can be used in conjunction with different circuits to achieve the desired control, and the accuracy and flexibility of the control can be guaranteed. There are many types of solenoid valves, and different solenoid valves play a role in different positions of the control system, which will not be repeated here. By purchasing an external solenoid valve to control the flow of fluid media in and out of the first inner cavity 1122, the structure can be simplified and the production efficiency of the shock absorber 100 can be improved. The throttle valve is a valve that controls the flow of fluid by changing the throttling section or throttling length. The throttle valve and the one-way valve can be combined into a one-way throttle valve in parallel.

[0071] Example 6

[0072] like Figure 4 As shown, this embodiment provides a shock absorber 100. In addition to the technical features of the above embodiment, this embodiment also includes the following technical features:

[0073] The shock absorber 100 further includes an oil groove 124 , which is circumferentially disposed on an outer surface 1222 of the piston 122 and the cylinder body 110 in contact with each other; wherein, there are one or more oil grooves 124 .

[0074] In this embodiment, several oil grooves 124 are processed on the outer wall of the piston 122. The oil grooves 124 are used as pressure equalizing grooves and sealing grooves. The function of the pressure equalizing grooves is to prevent the piston from getting stuck and to minimize the friction resistance. The function of the sealing grooves is to prevent a large amount of liquid in the second inner cavity 1124 from leaking into the first inner cavity 1122. A small amount of leakage is allowed between the first inner cavity 1122 and the second inner cavity 1124, which can increase the sensitivity of the movement of the piston 122. The liquid can be hydraulic oil.

[0075] Example 7

[0076] like Figure 4 As shown, this embodiment provides a shock absorber 100. In addition to the technical features of the above embodiment, this embodiment also includes the following technical features:

[0077] The cylinder body 110 further includes: a second inner cavity side wall 119 and a second flow port 118 . The second flow port 118 is disposed on the second inner cavity side wall 119 for the circulation of the working medium so that the working medium enters and exits the second inner cavity 1124 .

[0078] In this embodiment, the second inner cavity side wall 119 is opposite to the first inner cavity side wall 114, and the second flow opening 118 can be used for the circulation of the working medium so that the working medium enters and exits the second inner cavity 1124. A protrusion is provided on the cylinder body 110, and the second flow opening 118 passes through the protrusion and is connected to the second inner cavity 1124. The second flow opening 118 is provided to facilitate the working medium to enter and exit the second inner cavity 1124.

[0079] Example 8

[0080] like Figure 5 As shown, this embodiment provides a hydraulic system 10, including: a shock absorber 100, a first hydraulic pipeline 300, a second hydraulic pipeline 400 and an oil tank 200, the first hydraulic pipeline 300, one end of which is interconnected with the first inner cavity 1122; the second hydraulic pipeline 400, one end of which is interconnected with the second inner cavity 1124; wherein the other end of the first hydraulic pipeline 300 and the other end of the second hydraulic pipeline 400 are respectively connected to the oil tank 200.

[0081] In this embodiment, the fluid medium is a liquid, and the other end of the first hydraulic pipeline 300 extends into the oil tank 200 containing the liquid. One end of the first hydraulic pipeline 300 is interconnected with the first circulation port 116, and the other end of the first hydraulic pipeline 300 extends into the oil tank 200, so as to facilitate the transportation of the fluid medium. The working medium is the same as the fluid medium, which is a liquid. One end of the second hydraulic pipeline 400 is connected to the second circulation port 118, and the other end can be connected to the oil tank 200, so as to more conveniently fill the second inner cavity 1124 with liquid or make the liquid more convenient to flow back to the oil tank 200. In addition, since the hydraulic system 10 according to the embodiment of the present invention has the shock absorber according to any embodiment of the present invention, the hydraulic system 10 according to the embodiment of the present invention has all the beneficial effects of the shock absorber according to any embodiment of the present invention, which will not be repeated here.

[0082] Example 9

[0083] like Figure 5 As shown, this embodiment provides a hydraulic system 10. In addition to the technical features of the above embodiment, this embodiment also includes the following technical features:

[0084] The hydraulic system 10 further includes: an oil return line 500 ; wherein the second hydraulic line 400 is connected to the oil tank 200 via the oil return line 500 .

[0085] In this embodiment, by arranging the second hydraulic line 400 on the oil return line 500, the hydraulic oil on the oil return line 500 is used as the working medium, which saves energy and simplifies the structure. In addition, by arranging the shock absorber 100 on the hydraulic circuit of the reversing hydraulic system, the impact on the low-pressure element after reversing can be reduced.

[0086] Example 10

[0087] like Figure 6 and Figure 7 As shown, this embodiment provides a working mechanical device 1, including: a hydraulic circuit 20 and a shock absorber 100 in any embodiment, the shock absorber 100 is arranged on the hydraulic circuit 20; or a hydraulic system 10 in any embodiment.

[0088] In this embodiment, the working machine 1 includes a hydraulic circuit 20, and the shock absorber 100 is disposed on the hydraulic circuit 20 to reduce the pressure impact on the components on the hydraulic circuit 20. In addition, the working machine 1 according to the embodiment of the present invention has the shock absorber 100 according to any embodiment of the present invention, so the working machine 1 according to the embodiment of the present invention has all the beneficial effects of the shock absorber 100 according to any embodiment of the present invention, which will not be repeated here.

[0089] In summary, the beneficial effects of the embodiments of the present invention are as follows:

[0090] 1. The elongation speed of the elastic member 126 is controlled, and the movement of the piston 122 becomes slow, so that the hydraulic oil in the second inner cavity 1124 slowly enters the hydraulic system, which will not cause new pressure shock to the hydraulic oil return pipeline, and the oil return is more stable.

[0091] 2. The oil groove 124 is processed around the outer wall of the piston 122 to prevent the piston 122 from having excessive friction resistance or getting stuck, and at the same time solve the problem of seal damage and aging, reduce the failure rate, and extend the service life.

[0092] In the embodiments according to the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments according to the present invention can be understood according to specific circumstances.

[0093] In the description of the embodiments of the present invention, it should be understood that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the embodiments of the present invention.

[0094] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments according to the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0095] The above are only preferred embodiments according to the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various modifications and changes may be made according to the embodiments of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present invention shall be included in the protection scope of the embodiments of the present invention.

Claims

1. A shock absorber, characterized in that: include: A cylinder body having a cavity; A piston is disposed in the cavity and divides the cavity into a first inner cavity and a second inner cavity; an elastic member, disposed in the first inner cavity and connected to the piston and the cylinder; and Flow regulating valve group; The first inner cavity is unidirectionally conducted outward through the flow regulating valve group, and the flow regulating valve group is used to limit the flow area of ​​the fluid medium entering the first inner cavity, and the second inner cavity is used to be filled with a working medium, and the working medium is the same as the fluid medium; The flow regulating valve group is arranged on the cylinder body, the cylinder body includes a first inner cavity side wall, and the flow regulating valve group includes: A flow hole, provided on the side wall of the first inner cavity; a one-way valve disposed in the flow hole, wherein an inlet end of the one-way valve is connected to the first inner cavity; and A flow restriction structure, disposed on the side wall of the first inner cavity, the flow restriction structure is used to limit the flow area of ​​the fluid medium entering the first inner cavity; The flow limiting structure comprises: An adjustable flow valve for adjusting the flow area of ​​the fluid medium entering the first inner cavity; or The damping hole is used to limit the flow area of ​​the fluid medium entering the first inner cavity.

2. The shock absorber according to claim 1, characterized in that: The cylinder body also includes: A first flow port, provided on the side wall of the first inner cavity, for allowing a fluid medium to flow in and out of the first inner cavity; Wherein, the flow regulating valve group is arranged in the first circulation port, and the flow regulating valve group can make the first circulation port and the first inner cavity communicate with each other.

3. The shock absorber according to claim 2, characterized in that: The flow regulating valve group is a solenoid valve, which is used to control the flow of the fluid medium into and out of the first inner cavity; or The flow regulating valve group is a one-way throttle valve, and the inlet end of the one-way throttle valve is connected to the first inner cavity.

4. The shock absorber according to any one of claims 1 to 3, characterized in that: Also includes: An oil groove is annularly arranged on the outer surface of the piston and the cylinder body in contact with each other; Wherein, the oil tank is provided as one or more.

5. The shock absorber according to any one of claims 1 to 3, characterized in that: The cylinder body also includes: a second inner cavity side wall; The second flow port is provided on the side wall of the second inner cavity and is used for the flow of the working medium so that the working medium enters and exits the second inner cavity.

6. A hydraulic system, characterized in that: include: The shock absorber according to any one of claims 1 to 5; a first hydraulic pipeline, one end of which is in communication with the first inner cavity; a second hydraulic pipeline, one end of which is in communication with the second inner cavity; tank; Wherein, the other end of the first hydraulic pipeline and the other end of the second hydraulic pipeline are respectively connected to the oil tank.

7. The hydraulic system according to claim 6, characterized in that: Also includes: Oil return line; Wherein, the second hydraulic pipeline is connected to the oil tank through the oil return pipeline.

8. An operating mechanical device, characterized in that: include: The shock absorber according to any one of claims 1 to 5, wherein the shock absorber is arranged on the hydraulic circuit of the working machine equipment; or A hydraulic system as claimed in claim 6 or 7.

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