A damper valve

Abstract

The utility model discloses a kind of dampers, to provide a kind of parts machining precision requirement of electromagnetic assembly and valve body assembly can be reduced, reduce processing and assembly difficulty, thereby reduce manufacturing cost, facilitate actual production and make a kind of damper. It includes: valve body assembly, including main valve body, main valve cavity and the valve groove being located in one end of main valve body and being communicated with main valve cavity;Electromagnetic assembly, including: fixedly arranged pole shoe, including pole shoe cooperation part and the pole shoe inner hole being penetrated through pole shoe, pole shoe cooperation part is embedded in valve groove and is sealingly connected with the inner side wall of valve groove, to make electromagnetic assembly fixedly connected on main valve body, pilot valve seat, embedded in the one end port in pole shoe inner hole close to valve groove, pilot valve seat is equipped with pilot throttle hole;Slidably arranged valve stem, one end thereof extends into pole shoe inner hole, cooperates with pilot throttle hole, to control the flow area of pilot throttle hole.

Description

Technical Field

[0001] This utility model relates to the field of shock absorber technology, specifically to a damping valve used in shock absorbers. Background Technology

[0002] Shock absorbers are a crucial component of a car's suspension system, key to absorbing vibrations and suppressing impacts when the springs rebound after road shocks. While traditional passive suspension systems offer some damping, their performance and comfort are limited, as they cannot adjust in real-time according to road conditions and driving situations. To address these issues, shock absorbers need to be adjustable, i.e., adjustable shock absorbers. The core component of an adjustable shock absorber is the damping valve. The main purpose of the damping valve is to improve vehicle stability and comfort by dynamically adjusting the damping force of the shock absorber.

[0003] Current shock absorber damping valves generally include an electromagnetic assembly and a valve body assembly. The valve body assembly includes a main valve body, an inlet / outlet port on the main valve body, a main valve chamber within the main valve body, a pilot valve seat within the main valve body, and a pilot valve hole on the pilot valve seat, which communicates with the main valve chamber. The electromagnetic assembly includes a housing, a coil within the housing, and a valve stem. The main valve body is embedded in one end of the housing, thus fixing the electromagnetic assembly to the main valve body, making the electromagnetic assembly and the valve body assembly an integral unit. The valve stem end has a cone, which engages with the pilot valve hole to control the opening degree of the pilot valve hole. Specifically, when the electromagnetic assembly is energized, it controls the movement of the valve stem and the cone to adjust the flow area of ​​the pilot valve hole.

[0004] Currently, damping valves for shock absorbers are generally assembled using modular assembly. Specifically, the valve body assembly and the solenoid assembly are assembled separately. The solenoid assembly is then fixedly connected to the main valve body by being embedded in one end of the housing, making the solenoid assembly and valve body assembly a single unit. Since the pilot valve seat and pilot valve orifice are located in the valve body assembly, while the valve stem and cone are located in the solenoid assembly, the coaxiality of the valve stem and cone with the pilot valve orifice of the valve body assembly is affected by the assembly precision between the solenoid assembly and the main valve body, as well as the manufacturing and installation precision of the parts in the valve body assembly that mate with the pilot valve seat. This places high demands on the machining and assembly precision of the parts in both the solenoid assembly and the valve body assembly; otherwise, misalignment between the valve stem and cone and the pilot valve orifice of the valve body assembly can easily occur, affecting the damping control precision of the damping valve.

[0005] For example, Chinese Patent Publication No. CN 119122983 A, entitled "A Novel External Solenoid Valve Assembly for a Vibration Damper," has a pilot valve seat and pilot valve hole located in the valve body assembly, while the valve stem and cone are located in the solenoid assembly. It also suffers from the aforementioned problems. Utility Model Content

[0006] The purpose of this invention is to provide a damping valve that can reduce the precision requirements of the electromagnetic components and valve body components, reduce the difficulty of processing and assembly, thereby reducing manufacturing costs and facilitating actual production.

[0007] The technical solution of this utility model is: A damping valve, comprising: The valve body assembly includes a main valve body, a main valve chamber, and a valve groove located at one end of the main valve body and communicating with the main valve chamber. Electromagnetic components, including: The fixedly installed pole shoe includes a pole shoe mating part and a pole shoe inner hole penetrating the pole shoe. The pole shoe mating part is embedded in the valve groove and sealed to the inner side wall of the valve groove, so that the electromagnetic assembly is fixedly connected to the main valve body. A pilot valve seat is embedded in one end of the pole shoe bore near the valve groove, and the pilot valve seat is provided with a pilot throttling orifice. The sliding valve stem has one end extending into the inner bore of the pole shoe, engaging with the pilot throttling orifice to control its flow area. Compared to existing modular damping valves, which house the pilot valve seat and pilot valve orifice within the valve body assembly and the valve stem and cone within the solenoid assembly, the coaxiality of the valve stem and cone with the pilot valve orifice in the valve body assembly is affected by the assembly precision between the solenoid assembly and the main valve body, as well as the manufacturing and installation precision of the parts in the valve body assembly that mate with the pilot valve seat. This necessitates high machining and assembly precision for both the solenoid assembly and the valve body assembly parts; otherwise, misalignment between the valve stem and cone and the pilot valve orifice in the valve body assembly can easily occur, affecting the damping control precision of the damping valve. Compared to the previous approach, this damping valve solution employs modular assembly, with the valve body assembly and the solenoid assembly assembled separately. Since the valve stem and pilot seat are housed together in the solenoid assembly, and the valve stem, pilot seat, and pilot throttle orifice are all assembled within the solenoid assembly during valve body assembly, the coaxiality of the valve stem and pilot throttle orifice is unaffected by the manufacturing and installation precision of the valve body components or the assembly precision between the solenoid assembly and the main valve body. This reduces the precision requirements for the machining of the solenoid and valve body components, lowers machining and assembly difficulty, reduces manufacturing costs, and facilitates actual production.

[0008] On the other hand, the damping valve of this solution is embedded in the valve groove through the pole shoe mating part and sealed to the inner wall of the valve groove, so that the electromagnetic component is fixedly connected to the main valve body. In this way, the electromagnetic component can be fixedly connected to the main valve body, and the pole shoe mating part can be embedded in the valve groove and sealed to the inner wall of the valve groove, so that the electromagnetic component can accurately control the flow area of ​​the pilot throttling orifice by moving the valve stem.

[0009] Preferably, the electromagnetic component also includes: The housing has a guide cavity inside, the guide cavity has an open end, the valve stem is slidably disposed in the guide cavity, the pole shoe is embedded in the open end of the guide cavity and seals the open end, and the part of the pole shoe located outside the guide cavity constitutes the pole shoe mating part. A valve stem spring, located within the guide cavity, drives the valve stem to return to its original position, maximizing the flow area of ​​the pilot throttling orifice or closing it. This facilitates the actual fabrication and manufacturing of the electromagnetic components.

[0010] Preferably, the housing includes: outer shell; The inner shell is located inside the outer shell, and a coil cavity is formed between the outer shell and the inner shell. The coil of the electromagnetic component is located in the coil cavity, and the inner cavity of the inner shell constitutes the guide cavity. An end cap, located at the same end of the inner and outer shells, connects the inner and outer shells as a single unit. The end cap has an outwardly extending mating sleeve at its edge. One end of the main valve body extends into the mating sleeve, and there is a gap between the main valve body and the mating sleeve. This design divides the valve body assembly housing into three independent parts: the outer shell, the inner shell, and the end cap. These parts are manufactured separately and then assembled as a single unit. This simplifies the structure of each component, facilitating the actual manufacturing of the outer shell, the inner shell, and the end cap, reducing the difficulty of manufacturing the valve body assembly housing, and improving the yield rate. Simultaneously, the gap between the main valve body and the mating sleeve ensures that the pole shoe mating part is embedded in the valve groove and sealed to the inner wall of the valve groove.

[0011] Preferably, the pole shoe is cylindrical, with an outer stepped surface on its outer wall and an inner stepped surface on the inner wall of the guide cavity. The inner stepped surface is close to the opening end of the guide cavity, and the outer stepped surface abuts against the inner stepped surface. In this way, the pole shoe can be positioned by the cooperation of the outer and inner stepped surfaces, ensuring the installation accuracy of the pole shoe.

[0012] Preferably, the pole shoe mating part is located on one side of the outer stepped surface, and the outer diameter of the pole shoe containing the pole shoe mating part is larger than the outer diameter of the pole shoe located on the other side of the outer stepped surface. This increases the outer diameter of the pole shoe mating part. When the pole shoe mating part is embedded in the valve groove, it improves the structural stability of the installation structure between the pole shoe mating part and the valve body, thereby improving the structural stability of the installation structure between the valve body assembly and the solenoid assembly. Simultaneously, increasing the outer diameter of the pole shoe mating part allows for a corresponding increase in the inner diameter of the corresponding pole shoe inner bore, which is beneficial for installing pilot valve seats with pilot throttling orifices of different diameters.

[0013] Preferably, the valve body assembly also includes an oil outlet channel, including an annular groove at the edge of the valve groove and an oil outlet groove at one end of the main valve body and connected to the annular groove, the oil outlet groove being connected to the outside of the main valve body. The inner hole of the pole shoe is provided with an annular sealing part, and the valve stem is slidably sealed to the annular sealing part. The inner hole of the pole shoe between the annular sealing part and the pilot valve seat forms an oil outlet chamber. The pole shoe is provided with an oil outlet hole that connects the oil outlet chamber and the annular groove.

[0014] Preferably, the valve groove between the pilot valve seat and the bottom of the valve groove forms a pilot valve chamber. The pilot valve seat is provided with a long through hole, which connects the pilot valve chamber and the oil outlet chamber. A pilot throttling orifice also connects the pilot valve chamber and the oil outlet chamber. In this design, a long through hole is provided on the pilot valve seat, connecting the pilot valve chamber and the oil outlet chamber. A pilot throttling orifice also connects the pilot valve chamber and the oil outlet chamber, i.e., the long through hole and the controllable throttling orifice are arranged in parallel. In this way, under the low flow condition of the shock absorber, the damping force of the shock absorber can be increased, improving handling. At the same time, it can maintain a moderate level of comfort to adapt to flat road conditions, where the vehicle body bounce is relatively small, achieving a new balance between handling and comfort under the low flow condition of the shock absorber.

[0015] Preferably, the outer surface of the pilot valve seat is provided with an elongated opening, which constitutes the elongated through hole. Providing the elongated through hole on the outer surface of the pilot valve seat facilitates its actual machining and fabrication.

[0016] Preferably, the pilot valve seat has an internal through hole, which constitutes the elongated through hole. Providing the elongated through hole on the pilot valve seat facilitates its actual machining and fabrication.

[0017] Preferably, one end of the valve stem is provided with a control part that mates with the pilot throttling orifice. The control part is integrally formed with the valve stem and is conical or hemispherical. The integral forming of the control part with the valve stem in this design facilitates actual machining and manufacturing.

[0018] The beneficial effects of this utility model are as follows: The damping valve adopts modular assembly, with the valve body assembly assembled separately and the electromagnetic assembly assembled separately. Since the valve stem and pilot valve seat are set together in the electromagnetic assembly, the valve stem, pilot valve seat and its pilot throttling orifice are all assembled in the electromagnetic assembly when the valve body assembly is assembled. Therefore, the coaxiality of the valve stem and the pilot throttling orifice will not be affected by the manufacturing and installation accuracy of the parts of the valve body assembly or the assembly accuracy between the electromagnetic assembly and the main valve body. Thus, the machining accuracy requirements of the parts of the electromagnetic assembly and the valve body assembly can be reduced, the machining and assembly difficulty can be reduced, thereby reducing the manufacturing cost and facilitating actual production.

[0019] On the other hand, the damping valve of this solution is embedded in the valve groove through the pole shoe mating part and sealed to the inner wall of the valve groove, so that the electromagnetic component is fixedly connected to the main valve body. In this way, the electromagnetic component can be fixedly connected to the main valve body, and the pole shoe mating part can be embedded in the valve groove and sealed to the inner wall of the valve groove, so that the electromagnetic component can accurately control the flow area of ​​the pilot throttling orifice by moving the valve stem. Attached Figure Description

[0020] Figure 1 This is a cross-sectional structural diagram of a damping valve according to this utility model.

[0021] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0022] In the picture: Electromagnetic component 1, pole shoe 1.1, valve stem 1.2, valve stem spring 1.3, pole shoe mating part 1.4, pilot valve seat 1.5, pilot throttling orifice 1.51, long through hole 1.52, outer shell 1.6, inner shell 1.7, end cap 1.8, mating cylinder 1.9, guide inner cavity 1.10, annular sealing part 1.11, oil outlet hole 1.12, pole shoe inner hole 1.13, oil outlet chamber 1.14, control part 1.15; Valve body assembly 2, main valve body 2.1, main valve chamber 2.2, valve groove 2.3, main valve seat 2.4, main valve core 2.5, oil outlet channel 2.6, annular groove 2.61, oil outlet groove 2.62, main valve spring 2.7, connecting hole 2.8. Detailed Implementation

[0023] Specific Implementation Example 1, such as Figure 1 , Figure 2 As shown, a damping valve includes a valve body assembly 2 and an electromagnetic assembly 1.

[0024] The valve body assembly 2 includes a main valve body 2.1, a main valve cavity 2.2 disposed within the main valve body 2.1, and a valve groove 2.3 disposed at one end of the main valve body 2.1 and communicating with the main valve cavity 2.2. In this embodiment, the bottom surface of the valve groove 2.3 is disposed in a communicating hole 2.8 communicating with the main valve cavity 2.2.

[0025] The electromagnetic assembly 1 includes a fixedly mounted pole shoe 1.1, a slidably mounted valve stem 1.2, and a pilot valve seat 1.5. The pole shoe 1.1 includes a pole shoe mating portion 1.4 and a pole shoe inner hole 1.13 penetrating the pole shoe 1.1. The pole shoe inner hole 1.13 passes through the pole shoe 1.1 and the pole shoe mating portion 1.4 along the axis of the valve stem 1.2. The pole shoe mating portion 1.4 extends into the valve groove 2.3 from the groove opening and is embedded within the valve groove 2.3, thus fixing the electromagnetic assembly 1 to the main valve body 2.1. The pole shoe mating portion 1.4 is sealed to the inner wall of the valve groove 2.3. The valve groove 2.3 between the pilot valve seat 1.5 and the bottom of the groove forms the pilot valve chamber.

[0026] The pilot valve seat 1.5 is embedded in one end of the pole shoe inner bore 1.13 near the valve groove 2.3. The pilot valve seat 1.5 is provided with a pilot throttling orifice 1.51. The pilot throttling orifice 1.51 is connected to the pilot valve cavity.

[0027] One end of the valve stem 1.2 extends into the inner hole 1.13 of the pole shoe and engages with the pilot throttling orifice 1.51 to control the flow area of ​​the pilot throttling orifice 1.51. Specifically, when the electromagnetic component 1 is energized, it controls the movement of the valve stem 1.2 to adjust the flow area of ​​the pilot valve orifice, thereby controlling the continuous change of the flow area of ​​the pilot throttling orifice 1.51 by a given current.

[0028] Compared to existing modularly assembled shock absorber damping valves, where the pilot valve seat 1.5 and pilot valve hole are located in the valve body assembly 2, and the valve stem 1.2 and cone are located in the solenoid assembly 1, the coaxiality of the valve stem 1.2 and cone with the pilot valve hole of the valve body assembly 2 is affected by the assembly accuracy between the solenoid assembly 1 and the main valve body 2.1, as well as the manufacturing and installation accuracy of the parts in the valve body assembly 2 that mate with the pilot valve seat 1.5. This necessitates high machining and assembly accuracy for the parts of the solenoid assembly 1 and the valve body assembly 2; otherwise, misalignment between the valve stem 1.2 and cone and the pilot valve hole of the valve body assembly 2 may occur, affecting the damping control accuracy of the damping valve. Compared to other designs, the damping valve in this scheme adopts modular assembly. The valve body assembly 2 is assembled separately, and the solenoid assembly 1 is assembled separately. Since the valve stem 1.2 and the pilot valve seat 1.5 are set together in the solenoid assembly 1, when the valve body assembly 2 is assembled, the valve stem 1.2, the pilot valve seat 1.5 and the pilot throttling orifice 1.51 on it are all assembled in the solenoid assembly 1. Therefore, the coaxiality of the valve stem 1.2 and the pilot throttling orifice 1.51 will not be affected by the manufacturing and installation accuracy of the parts of the valve body assembly 2 or the assembly accuracy between the solenoid assembly 1 and the main valve body 2.1. Therefore, the machining accuracy requirements of the parts of the solenoid assembly 1 and the valve body assembly 2 can be reduced, the machining and assembly difficulty can be reduced, thereby reducing the manufacturing cost and facilitating actual production.

[0029] On the other hand, the damping valve of this solution is embedded in the valve groove 2.3 through the pole shoe mating part 1.4 and sealed to the inner wall of the valve groove 2.3, so that the electromagnetic component 1 is fixedly connected to the main valve body 2.1; in this way, the electromagnetic component 1 can be fixedly connected to the main valve body 2.1, and the pole shoe mating part 1.4 can be embedded in the valve groove 2.3 and sealed to the inner wall of the valve groove 2.3, so that the electromagnetic component 1 can accurately control the flow area of ​​the pilot throttle orifice 1.51 by moving the valve stem 1.2.

[0030] Specific embodiment two, such as Figure 1 , Figure 2 As shown, a damping valve includes a valve body assembly 2 and an electromagnetic assembly 1.

[0031] The valve body assembly 2 includes a main valve body 2.1, an oil outlet channel 2.6, a main valve cavity 2.2 located within the main valve body 2.1, and a valve groove 2.3 located at one end of the main valve body 2.1 and communicating with the main valve cavity 2.2. In this embodiment, the bottom surface of the valve groove 2.3 is located at a connecting hole 2.8 communicating with the main valve cavity 2.2. The oil outlet channel 2.6 includes an annular groove 2.61 located at the edge of the groove opening of the valve groove 2.3 and an oil outlet groove 2.62 located at one end of the main valve body 2.1 and communicating with the annular groove 2.61. The oil outlet groove 2.62 communicates with the outside of the main valve body 2.1.

[0032] The electromagnetic assembly 1 includes a fixedly mounted pole shoe 1.1, a slidably mounted valve stem 1.2, and a pilot valve seat 1.5. The pole shoe 1.1 includes a pole shoe mating portion 1.4 and a pole shoe inner hole 1.13 penetrating the pole shoe 1.1. The pole shoe inner hole 1.13 passes through the pole shoe 1.1 and the pole shoe mating portion 1.4 along the axis of the valve stem 1.2. The pole shoe mating portion 1.4 extends into the valve groove 2.3 from the groove opening and is embedded within the valve groove 2.3, thus fixing the electromagnetic assembly 1 to the main valve body 2.1. The pole shoe mating portion 1.4 is sealed to the inner wall of the valve groove 2.3. The valve groove 2.3 between the pilot valve seat 1.5 and the bottom of the groove forms the pilot valve chamber.

[0033] The pilot valve seat 1.5 is embedded in one end of the pole shoe inner bore 1.13 near the valve groove 2.3. The pilot valve seat 1.5 is provided with a pilot throttling orifice 1.51. The pilot throttling orifice 1.51 is connected to the pilot valve cavity.

[0034] An annular sealing portion 1.11 is located within the inner bore 1.13 of the pole shoe. The valve stem 1.2 is slidably sealed to the annular sealing portion 1.11. The inner bore 1.13 of the pole shoe between the annular sealing portion 1.11 and the pilot valve seat 1.5 forms an oil outlet chamber 1.14. An oil outlet hole 1.12 is provided on the pole shoe 1.1, connecting the oil outlet chamber 1.14 and the annular groove 2.61. A pilot throttling orifice 1.51 connects the pilot valve chamber and the oil outlet chamber 1.14.

[0035] One end of the valve stem 1.2 extends into the inner hole 1.13 of the pole shoe and engages with the pilot throttle orifice 1.51 to control the flow area of ​​the pilot throttle orifice 1.51. In this embodiment, one end of the valve stem 1.2 extends into the oil outlet chamber 1.14 and engages with the pilot throttle orifice 1.51 to control the flow area of ​​the pilot throttle orifice 1.51. Specifically, when the electromagnetic component 1 is energized, it controls the movement of the valve stem 1.2 to adjust and control the flow area of ​​the pilot valve orifice, thereby controlling the continuous change of the flow area of ​​the pilot throttle orifice 1.51 by a given current.

[0036] Compared to existing modularly assembled shock absorber damping valves, where the pilot valve seat 1.5 and pilot valve hole are located in the valve body assembly 2, and the valve stem 1.2 and cone are located in the solenoid assembly 1, the coaxiality of the valve stem 1.2 and cone with the pilot valve hole of the valve body assembly 2 is affected by the assembly accuracy between the solenoid assembly 1 and the main valve body 2.1, as well as the manufacturing and installation accuracy of the parts in the valve body assembly 2 that mate with the pilot valve seat 1.5. This necessitates high machining and assembly accuracy for the parts of the solenoid assembly 1 and the valve body assembly 2; otherwise, misalignment between the valve stem 1.2 and cone and the pilot valve hole of the valve body assembly 2 may occur, affecting the damping control accuracy of the damping valve. Compared to other designs, the damping valve in this scheme adopts modular assembly. The valve body assembly 2 is assembled separately, and the solenoid assembly 1 is assembled separately. Since the valve stem 1.2 and the pilot valve seat 1.5 are set together in the solenoid assembly 1, when the valve body assembly 2 is assembled, the valve stem 1.2, the pilot valve seat 1.5 and the pilot throttling orifice 1.51 on it are all assembled in the solenoid assembly 1. Therefore, the coaxiality of the valve stem 1.2 and the pilot throttling orifice 1.51 will not be affected by the manufacturing and installation accuracy of the parts of the valve body assembly 2 or the assembly accuracy between the solenoid assembly 1 and the main valve body 2.1. Therefore, the machining accuracy requirements of the parts of the solenoid assembly 1 and the valve body assembly 2 can be reduced, the machining and assembly difficulty can be reduced, thereby reducing the manufacturing cost and facilitating actual production.

[0037] On the other hand, the damping valve of this solution is embedded in the valve groove 2.3 through the pole shoe mating part 1.4 and sealed to the inner wall of the valve groove 2.3, so that the electromagnetic component 1 is fixedly connected to the main valve body 2.1; in this way, the electromagnetic component 1 can be fixedly connected to the main valve body 2.1, and the pole shoe mating part 1.4 can be embedded in the valve groove 2.3 and sealed to the inner wall of the valve groove 2.3, so that the electromagnetic component 1 can accurately control the flow area of ​​the pilot throttle orifice 1.51 by moving the valve stem 1.2.

[0038] Specifically, such as Figure 1 , Figure 2As shown, valve body assembly 2 also includes a main valve seat 2.4, a main valve core 2.5, a main valve spring 2.7, and an oil inlet and an oil outlet. The oil inlet and outlet are located on the main valve body 2.1. Both the oil inlet and outlet are connected to the main valve chamber 2.2. The main valve seat 2.4 is fixedly located within the main valve body 2.1. The main valve core 2.5 is slidably located within the main valve chamber 2.2, dividing the main valve chamber 2.2 into two chambers. The main valve core 2.5 has a main valve throttling orifice connecting the two chambers. The main valve core 2.5 and the main valve seat 2.4 are located on the same side of the main valve spring 2.7. The main valve spring 2.7 is located within one of the chambers, and the main valve spring 2.7 drives the main valve core 2.5 to abut against the main valve seat 2.4. When the main valve core 2.5 abuts against the main valve seat 2.4, the oil inlet and outlet are not connected.

[0039] The electromagnetic assembly 1 also includes a housing and a valve stem spring 1.3. A guide cavity 1.10 is located at the center of the housing. The guide cavity 1.10 has an open end. The valve stem 1.2 is slidably disposed within the guide cavity 1.10. A pole shoe 1.1 is embedded in the open end of the guide cavity 1.10 and seals the open end. The portion of the pole shoe 1.1 located outside the guide cavity 1.10 constitutes the pole shoe mating part 1.4. The valve stem spring 1.3, disposed within the guide cavity 1.10, drives the valve stem 1.2 to reset, thereby maximizing the flow area of ​​the pilot throttle orifice 1.51 or closing the pilot throttle orifice 1.51.

[0040] In one example, such as Figure 1 , Figure 2 As shown, the valve stem spring 1.3 drives the valve stem 1.2 to return to its original position, thereby maximizing the flow area of ​​the pilot throttle orifice 1.51. In this example, the opening of the pilot throttle orifice 1.51 reaches its maximum when the electromagnetic component 1 is de-energized.

[0041] In another example, the valve stem spring 1.3 drives the valve stem 1.2 to reset, thereby closing the pilot throttle orifice 1.51. In this example, when the solenoid assembly 1 is de-energized, the valve stem 1.2 closes the pilot throttle orifice 1.51.

[0042] Furthermore, such as Figure 1 , Figure 2 As shown, one end of the valve stem 1.2 is provided with a control part 1.15 that mates with the pilot throttling orifice 1.51. The control part 1.15 is integrally formed with the valve stem 1.2, and the control part 1.15 is conical or hemispherical. In this design, the control part is integrally formed with the valve stem 1.2, which facilitates actual processing and manufacturing.

[0043] Furthermore, such as Figure 1As shown, the housing includes an outer shell 1.6, an inner shell 1.7, and an end cap 1.8. The outer shell 1.6, inner shell 1.7, and end cap 1.8 are manufactured separately. The inner shell 1.7 is located inside the outer shell 1.6. A coil cavity is formed between the outer shell 1.6 and the inner shell 1.7. The coil of the electromagnetic component 1 is located within the coil cavity. The inner cavity of the inner shell 1.7 constitutes the aforementioned guide cavity 1.10. The end cap 1.8 is located at the same end of the inner shell 1.7 and the outer shell 1.6, connecting the inner shell 1.7 and the outer shell 1.6 as a single unit. The edge of the end cap 1.8 has an outwardly extending mating sleeve 1.9. One end of the main valve body 2.1 extends into the mating sleeve 1.9, and there is a gap between the main valve body 2.1 and the mating sleeve 1.9. This solution divides the housing of valve body assembly 2 into three independent parts: the outer shell 1.6, the inner shell 1.7, and the end cap 1.8. These parts are manufactured separately and then assembled into a single unit. This simplifies the structure of each component, making it easier to manufacture and reducing the manufacturing difficulty of valve body assembly 2, thus improving the yield rate. Simultaneously, one end of the main valve body 2.1 extends into the mating cylinder 1.9, and there is a gap between the main valve body 2.1 and the mating cylinder 1.9. This ensures that the pole shoe mating part 1.4 is embedded in the valve groove 2.3 and sealed to the inner wall of the valve groove 2.3.

[0044] Furthermore, such as Figure 1 , Figure 2 As shown, the pole shoe 1.1 is cylindrical. The outer wall of the pole shoe 1.1 has an outer stepped surface. The inner wall of the guide cavity 1.10 has an inner stepped surface. The inner stepped surface is close to the opening end of the guide cavity 1.10. The outer stepped surface abuts against the inner stepped surface. Thus, the pole shoe 1.1 can be positioned by the cooperation of the outer and inner stepped surfaces, ensuring the installation accuracy of the pole shoe 1.1.

[0045] Furthermore, the pole shoe mating part 1.4 is located on one side of the outer stepped surface, and the outer diameter of the pole shoe 1.1 containing the pole shoe mating part 1.4 is larger than the outer diameter of the pole shoe 1.1 located on the other side of the outer stepped surface. This increases the outer diameter of the pole shoe mating part 1.4. When the pole shoe mating part 1.4 is embedded in the valve groove 2.3, the installation structure stability of the pole shoe mating part 1.4 and the valve body can be improved, thereby improving the installation structure stability of the valve body assembly 2 and the solenoid assembly 1. At the same time, the increased outer diameter of the pole shoe mating part 1.4 can correspondingly increase the inner diameter of the pole shoe inner hole 1.13 corresponding to the pole shoe mating part 1.4, which is beneficial for the installation of the pilot valve seat 1.5 that can accommodate pilot throttling orifices 1.51 with different orifice diameters.

[0046] Furthermore, such as Figure 2As shown, a long through hole 1.52 is provided on the pilot valve seat 1.5. The long through hole 1.52 connects the pilot valve chamber and the oil outlet chamber 1.14. The pilot throttle orifice 1.51 also connects the pilot valve chamber and the oil outlet chamber 1.14. In this design, a long through hole 1.52 is provided on the pilot valve seat 1.5, which connects the pilot valve chamber and the oil outlet chamber 1.14. The pilot throttle orifice 1.51 also connects the pilot valve chamber and the oil outlet chamber 1.14. That is, the long through hole 1.52 and the controllable throttle orifice are arranged in parallel. In this way, under the low flow condition of the shock absorber, the damping force of the shock absorber can be increased, improving the handling. At the same time, it can maintain a moderate level of comfort to adapt to flat road conditions, where the body bounce is relatively small, achieving a new balance between handling and comfort under the low flow condition of the shock absorber.

[0047] In one embodiment, a long through-hole is provided on the outer side of the pilot valve seat 1.5, which constitutes the long through-hole 1.52. Providing the long through-hole 1.52 on the outer side of the pilot valve seat 1.5 facilitates its actual machining and fabrication.

[0048] In another embodiment, the pilot valve seat 1.5 has an internal through hole, which constitutes the elongated through hole 1.52. Providing the elongated through hole 1.52 on the pilot valve seat 1.5 facilitates its actual machining and fabrication.

[0049] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A damping valve, characterized in that, include: The valve body assembly includes a main valve body, a main valve chamber, and a valve groove located at one end of the main valve body and communicating with the main valve chamber. Electromagnetic components, including: The fixedly installed pole shoe includes a pole shoe mating part and a pole shoe inner hole penetrating the pole shoe. The pole shoe mating part is embedded in the valve groove and sealed to the inner side wall of the valve groove, so that the electromagnetic assembly is fixedly connected to the main valve body. A pilot valve seat is embedded in one end of the pole shoe bore near the valve groove, and the pilot valve seat is provided with a pilot throttling orifice. The valve stem is slidably mounted, with one end extending into the inner bore of the pole shoe to cooperate with the pilot throttling orifice to control the flow area of ​​the pilot throttling orifice.

2. A damping valve according to claim 1, characterized in that, The electromagnetic component also includes: The housing has a guide cavity inside, the guide cavity has an open end, the valve stem is slidably disposed in the guide cavity, the pole shoe is embedded in the open end of the guide cavity and seals the open end, and the part of the pole shoe located outside the guide cavity constitutes the pole shoe mating part. A valve stem spring, located within the guide cavity, drives the valve stem to reset, thereby maximizing the flow area of ​​the pilot throttle orifice or closing the pilot throttle orifice.

3. A damping valve according to claim 2, characterized in that, The housing includes: outer shell; The inner shell is located inside the outer shell, and a coil cavity is formed between the outer shell and the inner shell. The coil of the electromagnetic component is located in the coil cavity, and the inner cavity of the inner shell constitutes the guide cavity. An end cap is located at the same end of the inner shell and the outer shell, connecting the inner shell and the outer shell as one unit. The edge of the end cap has a mating cylinder that extends outward. One end of the main valve body extends into the mating cylinder, and there is a gap between the main valve body and the mating cylinder.

4. A damping valve according to claim 2 or 3, characterized in that, The pole shoe is cylindrical, and the outer wall of the pole shoe is provided with an outer stepped surface. The inner wall of the guide cavity is provided with an inner stepped surface. The inner stepped surface is close to the opening end of the guide cavity, and the outer stepped surface abuts against the inner stepped surface.

5. A damping valve according to claim 4, characterized in that, The pole shoe mating part is located on one side of the outer step surface, and the outer diameter of the pole shoe where the pole shoe mating part is located is larger than the outer diameter of the pole shoe located on the other side of the outer step surface.

6. A damping valve according to claim 1, 2, or 3, characterized in that, The valve body assembly also includes an oil outlet channel, including an annular groove located at the edge of the valve groove and an oil outlet groove located at one end of the main valve body and connected to the annular groove, the oil outlet groove being connected to the outside of the main valve body. The inner hole of the pole shoe is provided with an annular sealing part, and the valve stem is slidably sealed to the annular sealing part. The inner hole of the pole shoe between the annular sealing part and the pilot valve seat forms an oil outlet chamber. The pole shoe is provided with an oil outlet hole that connects the oil outlet chamber and the annular groove.

7. A damping valve according to claim 6, characterized in that, The valve groove between the pilot valve seat and the bottom of the valve groove forms a pilot valve cavity. The pilot valve seat is provided with a long through hole, which connects the pilot valve cavity and the oil outlet cavity. The pilot throttling hole connects the pilot valve cavity and the oil outlet cavity.

8. A damping valve according to claim 7, characterized in that, The pilot valve seat has a long through-hole on its outer side, which forms the long through-hole.

9. A damping valve according to claim 7, characterized in that, The pilot valve seat is provided with an internal through hole, which constitutes the elongated through hole.

10. A damping valve according to claim 1, 2, or 3, characterized in that, One end of the valve stem is provided with a control part that cooperates with the pilot throttling orifice. The control part is integrally formed with the valve stem and is conical or hemispherical.

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