A shock absorber electromagnetic damping valve device and assembly method

Abstract

The present invention relates to an electromagnetic damping valve device for a shock absorber and an assembly method. The magnetic isolation sleeve is separated and the press-fitting process that originally required is simplified into a plurality of loosely fitted part modules, which can be easily assembled and are convenient for the subsequent automated assembly line. The moving iron that was originally guided by an internal shaft sleeve is changed to an integrated moving iron core, which is then externally guided by an upper magnetic isolation sleeve. The double spring structure that needs to be set in series at both ends of the moving iron core is changed to a single spring to adjust the preload force, thereby reducing the fluctuation range and improving the stability. The original shaft sleeve is replaced by a Teflon film to reduce the friction caused by the tilt of the moving iron core when it is working. Through the various parts of the above modular arrangement, the entire process is installed through the threaded connection of the lower magnetic isolation sleeve, which reduces the processing accuracy requirements, avoids the superposition of tolerances, and avoids the process that originally required a press for tight fitting, thereby achieving convenient assembly, reducing costs, and improving assembly efficiency.

Description

Technical Field

[0001] The invention relates to the field of shock absorbers, and in particular to an electromagnetic damping valve device of a shock absorber and an assembly method thereof. Background Art

[0002] Traditional shock absorbers have fixed characteristics and provide fixed damping characteristic curves during extension or compression, while adjustable shock absorbers provide a characteristic field. The system selects different damping in the field in a timely manner according to the working conditions (road conditions, braking, acceleration, turning, driver's wishes, etc.) to curb body vibration, prevent tires from bouncing, and maintain body stability. Variable damping shock absorbers are mainly realized through magnetorheological, solenoid valve, stepper motor and other methods. Solenoid valve type is widely used for its reliable performance, low cost, quick response, compact structure and other advantages.

[0003] Solenoid valve type variable damping shock absorbers are being used more and more widely at home and abroad. They are mainly controlled by actuators to control the front-stage valve, thereby setting the pressure in the control chamber. The control pressure applies a closing force to the main-stage valve. The front-stage valve can be used to control very large adjustment forces or closing forces with low energy input. By using the front-stage valve and the main-stage valve and, if necessary, a series connection with a traditional solenoid valve as part of the solenoid valve device, the characteristic curve characteristics can be greatly influenced.

[0004] The shock absorber damping valve device in the prior art usually sets the main-stage valve and the shell independently, and is designed with a first flow channel for the damping medium to pass through, so that the damping medium can flow between the main-stage chamber and the front-stage chamber, thereby realizing the adjustment of the damping force. This independently set main-stage valve structure, the setting of the axial guide groove, and the use of the joint as the first flow channel eliminate the need for radial drilling, reduce the dependence on seals, and eliminate the intermediate wall that is difficult to process in the prior art, thereby reducing the manufacturing difficulty and facilitating maintenance and replacement. In addition, the design of the main valve core rising and falling along the axial direction allows the damping force to be accurately adjusted as needed, thereby improving the response speed and damping performance of the device. By optimizing the main valve shell cover and the main valve core structure in the main-stage valve, the performance of the shock absorber damping valve device is improved and the cost is reduced, expensive post-processing steps are avoided, and the manufacture of radial holes is simplified.

[0005] However, the shock absorber damping valve device in the prior art has the following defects in actual use: 1. The moving iron seat needs to be tightly installed in the magnetic isolation sleeve, and the spring is installed on the moving iron seat. At the same time, the housing and the shock absorber are welded, and the valve ring seat is also threadedly connected to the magnetic isolation sleeve. It is also necessary to ensure that the moving iron core, the moving iron seat, the front-stage valve, and the main-stage valve are on the same axis. Such structural installation requirements lead to the superposition of the entire tolerance, and the cumulative tolerance is very large, and the requirements for the product are very high. When the accuracy is not enough, the various components need to be tightly installed, resulting in the entire assembly process must be assembled using a press, and rapid automated assembly cannot be achieved; 2. In the above scheme, the springs at both ends of the moving iron core are arranged in series to control the preload force of the front-stage valve, but the double spring series connection method requires the moving iron core to adjust the balance of the springs at both ends when adjusting the preload force, which increases the cost and process steps, and the fluctuation range caused by the superposition of the double spring tolerances is also too large, resulting in cumbersome and difficult preload force adjustment. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an electromagnetic damping valve device of a shock absorber and a method for assembling the electromagnetic damping valve device in response to the deficiencies of the above-mentioned prior art. The magnetic isolation sleeve is separated and the press-fitting process that originally required press-fitting is simplified into a plurality of loosely-fitted part modules, which can be easily assembled and are convenient for subsequent automated assembly lines. The moving iron that was originally guided by an internal sleeve is changed to an integrated moving iron core, which is then externally guided by an upper magnetic isolation sleeve. The double spring structure that needs to be set in series at both ends of the moving iron core is changed to a single spring to adjust the preload force, thereby reducing the fluctuation range and improving stability. The original sleeve is replaced by a Teflon film to reduce the friction caused by the tilt of the moving iron core during operation. Through the various parts of the above modular arrangement, the entire process is installed through the threaded connection of the lower magnetic isolation sleeve, which reduces the processing accuracy requirements, avoids tolerance superposition, and avoids the process that originally required a press for tight fitting, thereby achieving convenient assembly, reducing costs, and improving assembly efficiency.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a shock absorber electromagnetic damping valve device, including a damping valve device body, the damping valve device body including a shell, a front-stage valve and a main-stage valve, the shell corresponding to the front-stage valve is provided with a front-stage valve actuator for controlling the front-stage valve to adjust the closing pressure, the closing pressure acts on the axially movable main-stage valve, and is characterized in that: the front-stage valve actuator includes a moving iron core connected to the front-stage valve, an upper magnetic isolation sleeve arranged on the outer circumference of the moving iron core, a moving iron seat arranged at the front end of the moving iron core, and an electromagnetic coil sleeved on the outer circumference of the upper magnetic isolation sleeve, one end of the moving iron core is abutted against the upper magnetic isolation sleeve through an elastic member, and the other end extends out of the moving iron seat and is fixedly connected to the front-stage valve, and the shell is provided with a detachable connection with the upper magnetic isolation sleeve. A lower magnetic isolation sleeve, one end of the lower magnetic isolation sleeve facing the upper magnetic isolation sleeve is provided with a first limiting portion that is abutted against a moving iron seat, and the upper magnetic isolation sleeve is provided with a first moving iron positioning step corresponding to the moving iron seat. One end of the moving iron seat is abutted against the first limiting portion, and the other end is abutted against the first moving iron positioning step, and cooperates with the upper magnetic isolation sleeve to form a moving iron activity cavity for the moving iron core to move axially therein. The main-stage valve is movably installed in the lower magnetic isolation sleeve, and is abutted against the front-stage valve after passing through the lower magnetic isolation sleeve. A valve ring seat is provided at the bottom of the lower magnetic isolation sleeve, and the moving iron core, the main-stage valve and the front-stage valve are all coaxially arranged in the shell. One end of the lower magnetic isolation sleeve is provided with a front-stage cavity for the front-stage valve to float therein, and the other end is provided with a main-stage cavity that cooperates with the valve ring seat to form an activity of the main-stage valve therein.

[0008] By adopting the above technical scheme, the moving iron core is a key component in the electromagnetic damping valve device, and its stability and movement accuracy directly affect the adjustment effect of the damping force. Through the split setting of the magnetic isolation sleeve, the detachable connection between the upper magnetic isolation sleeve and the lower magnetic isolation sleeve is realized, which greatly improves the convenience of assembly and the feasibility of maintenance, so that each component can be independently processed and replaced, reducing the high requirements for processing accuracy, and also avoiding the assembly difficulty caused by welding or tight installation. The setting of the first limit part and the first moving iron positioning step allows the moving iron seat to be loosely installed in the upper magnetic isolation sleeve, and through the first moving iron positioning step and the first limit The two ends of the moving iron seat are limited in the upper magnetic isolation sleeve, avoiding the installation difficulties and cumulative tolerance problems caused by the need to fit the moving iron seat into the magnetic isolation sleeve, providing a clear installation position for the moving iron seat, reducing the complexity of the assembly process and the dependence on assembly tools. In addition, the single spring set on the moving iron core replaces the original double spring series structure, and the preload force adjustment of the front stage valve is achieved through a single spring, which simplifies the force transmission path, reduces the influence of the stiffness difference between the springs on the preload force adjustment accuracy, and realizes the precise control of the closing pressure of the front stage valve, thereby ensuring the consistency and reliability of the damping force adjustment. At the same time, the use of a single spring also helps to reduce costs and the number of components, improves the stability and durability of the entire damping valve device, and provides a basis for subsequent convenient automated assembly.

[0009] The above-mentioned shock absorber electromagnetic damping valve device can be further configured as follows: one end of the lower magnetic isolation sleeve is provided with a first threaded portion threadedly connected to the upper magnetic isolation sleeve, and the other end is provided with a second threaded portion threadedly connected to the valve ring seat, and the second threaded portion has an adjustment step at one end facing the main-stage valve, the outer peripheral surface of the valve ring seat is set against the main-stage valve, and the floating range of the main-stage valve in the main-stage cavity is controlled by rotating the valve ring seat.

[0010] The above technical scheme is adopted, and a second moving iron positioning step is also provided on the moving iron seat. The second moving iron positioning step is arranged in the middle of the moving iron seat and cooperates with the inner wall of the upper magnetic isolation sleeve to further limit the axial position of the moving iron seat. The upper magnetic isolation sleeve, the lower magnetic isolation sleeve and the valve ring seat are connected firmly and flexibly by threaded connection, so that the upper magnetic isolation sleeve, the lower magnetic isolation sleeve and the valve ring seat can be quickly disassembled and assembled, and the cumulative tolerance is avoided. The convenience of maintenance and replacement is improved, and the maintenance cost is reduced. An adjustment step with an adjustable gap is provided between the second threaded portion and the main-stage valve. The second threaded portion serves as a normal mounting structure of the valve ring seat. When additional spring preload force adjustment is required, the position of the main-stage valve can be adjusted by rotating the valve ring seat and adjusting the relative distance between the valve ring seat and the front-stage valve, thereby conveniently changing the space of the main-stage cavity and controlling the flow resistance of the damping medium in the main-stage cavity. The mutual contact between the moving iron, the ejector pin seat, the front-stage valve and the main-stage valve offsets the spring stiffness tolerance by adjusting the height of the valve ring seat to the main-stage valve, thereby achieving fine adjustment of the damping force.

[0011] The above-mentioned shock absorber electromagnetic damping valve device can be further configured as follows: the outer peripheral surface of the moving iron core slides against the inner wall of the upper magnetic isolation sleeve, the elastic member is a preload spring, and the end of the moving iron core away from the front-stage valve is provided with a spring accommodating chamber for accommodating the preload spring, one end of the preload spring abuts against the upper magnetic isolation sleeve, and the other end abuts against the moving iron core, and preloads the closing pressure on the front-stage valve.

[0012] By adopting the above technical solution, the moving iron originally guided by the internal sleeve is changed to an integrated moving iron core, so that the outer peripheral surface of the moving iron core slides against the inner wall of the upper magnetic isolation sleeve, thereby converting the original inner shaft guide into an outer guided sliding. The setting of a separate preload spring ensures that the front stage valve can maintain a certain closing force even when the electromagnetic coil is not energized, thereby avoiding leakage and performance degradation of the damping valve.

[0013] The above-mentioned shock absorber electromagnetic damping valve device can be further configured as follows: a Teflon film is provided between the moving iron core and the upper magnetic isolation sleeve, and a connector detachably connected to the shell is provided outside the upper magnetic isolation sleeve.

[0014] By adopting the above technical solution, in the existing design, the moving iron must have a core shaft and a sleeve. The verticality is ensured by the cooperation of the core shaft and the sleeve to avoid the moving iron core from tilting during movement, thereby generating friction. By setting the moving iron and the core shaft as one, the moving iron core is converted to external guided sliding. By setting a Teflon film, the friction caused by the tilt of the moving iron core during operation is reduced, thereby reducing the energy loss and wear caused by friction, and extending the service life of the electromagnetic damping valve device.

[0015] The above-mentioned shock absorber electromagnetic damping valve device can be further configured as follows: the moving iron seat is loosely mounted outside the moving iron core and installed in the upper magnetic isolation sleeve through the first limiting portion, and a front-stage floating cavity is provided in the center of the moving iron seat for the front-stage valve to enter or escape.

[0016] By adopting the above technical solution, the loose fitting arrangement of the moving iron seat allows it to be flexibly positioned in the upper magnetic isolation sleeve, and the use of the first limit part limits the movement range of the moving iron seat, ensuring the axial activity space of the moving iron core, simplifying the installation process of the moving iron seat, and improving the assembly efficiency and accuracy. The front-stage floating cavity design in the center of the moving iron seat provides the necessary space for the front-stage valve, ensuring the free floating and precise adjustment of the front-stage valve.

[0017] The above-mentioned shock absorber electromagnetic damping valve device can be further configured as follows: a valve ring damping adjustment component is provided on the valve ring seat, and the valve ring damping adjustment component includes a valve stem inserted in the valve ring seat, a damping valve plate group sleeved on the outer peripheral surface of the valve stem, and a first damping channel opened on the valve ring seat and connected to the main stage chamber; one end of the valve stem passes through the valve ring seat and is sleeved with the damping valve plate group, and then the damping valve plate group is pressed against the surface of the first damping channel, and the other end is fixedly connected to the valve ring seat; a first circulation channel connected to the front stage chamber is provided in the lower magnetic isolation sleeve, and a second circulation channel connected to the first circulation channel is provided on the valve ring seat; the valve ring seat and the main stage valve are used to control the disconnection or connection of the second circulation channel and the first circulation channel.

[0018] By adopting the above technical scheme, through the setting of the valve stem and the damping valve plate group, the damping valve plate group is pressed on the surface of the first damping channel, and the damping force flowing through the first damping channel is controlled, thereby adjusting the flow rate and pressure of the damping medium. The linkage control of the second circulation channel and the first circulation channel further optimizes the distribution of the damping medium, improves the response speed and adjustment accuracy of the shock absorber, and by controlling the disconnection or conduction of the second circulation channel and the first circulation channel, precise control of the flow of the damping medium is achieved, thereby optimizing the performance of the shock absorber.

[0019] The above-mentioned shock absorber electromagnetic damping valve device can be further configured as follows: the front-stage valve includes a pin seat connected to the moving iron core, a pin and a pin valve plate arranged between the pin seat and the pin, one end of the pin abuts against the main-stage valve, and the other end abuts against the pin valve plate, and the pin seat fixes the pin and the pin valve plate in the pin seat by a riveting process.

[0020] Using the above technical solution, the riveting and fixing process is a method of connecting metal parts together through pressure, which can achieve close fit and high-strength connection between parts. The riveting and fixing of the ejector seat, ejector and ejector valve plate not only ensures the stability of the front-stage valve assembly, but also improves its sealing performance. The raised part at one end of the ejector is against the main-stage valve, which improves its sealing with the front-stage cavity and makes the throttling more stable. At the same time, the other end promotes the ejector to move toward one end of the main-stage valve through the ejector valve plate, which helps to reset and achieve flexible shock absorption.

[0021] The above-mentioned shock absorber electromagnetic damping valve device can be further configured as follows: one end of the lower magnetic isolation sleeve corresponding to the front-stage valve is provided with a guide hole for the central axis of the main-stage valve to pass through, the central axis is provided with an axial channel corresponding to the front-stage valve, and a transverse channel is arranged on the main-stage valve to connect the axial channel and the main-stage cavity, the outer wall of the main-stage valve slides against the lower magnetic isolation sleeve, and a main-stage sealing ring is provided therebetween.

[0022] The above technical solution is adopted: the design of the guide hole and the central axis provides guidance for the precise positioning and movement of the main stage valve, ensuring the coaxiality and coordination between the main stage valve and the front stage valve. The use of the main stage sealing ring, based on the principle of sealing technology, realizes the sealing between the main stage valve and the lower magnetic isolation sleeve through the compression of the elastic sealing material, preventing the leakage of the damping medium. This design not only improves the working efficiency of the shock absorber, but also prolongs its service life.

[0023] Also disclosed is a method for assembling a shock absorber electromagnetic damping valve device, comprising the following steps:

[0024] S1. Select the upper magnetic isolation sleeve, place the moving iron core loaded with the preload spring into the upper magnetic isolation sleeve, and make the preload spring abut against the upper magnetic isolation sleeve;

[0025] S2. Select a moving iron seat, loosely install the moving iron seat in the upper magnetic isolation sleeve, and set the center sleeve outside the moving iron core, so that the moving iron seat and the upper magnetic isolation sleeve cooperate to form a moving iron accommodating cavity for the moving iron core to move inside;

[0026] S3. Select the fore-stage valve, press and install the ejector pin seat of the fore-stage valve on the moving iron core, and make the ejector pin on the fore-stage valve face the end away from the moving iron core;

[0027] S4, select a lower magnetic isolation sleeve, and thread the lower magnetic isolation sleeve with the upper magnetic isolation sleeve through the first threaded portion of the lower magnetic isolation sleeve, so that the first limit portion of the lower magnetic isolation sleeve abuts against the upper magnetic isolation sleeve and the moving iron seat respectively, and the moving iron seat is fixedly installed in the lower magnetic isolation sleeve;

[0028] S5. Select the main stage valve, pass the central axis of the main stage valve through the guide hole and abut against the ejector pin of the front stage valve, and slide along the outer peripheral surface of the main stage valve against the inner wall of the lower magnetic isolation sleeve;

[0029] S6. Select a valve ring seat, thread the outer wall of the valve ring seat to the second threaded portion of the lower magnetic isolation sleeve, movably install the main stage valve in the lower magnetic isolation sleeve and abut against the end of the main stage valve, adjust the preload force of the main stage valve by rotating the valve ring seat, and obtain an internal damping valve assembly;

[0030] S7, select a housing and an electromagnetic coil, place the inner damping valve assembly into the housing, and arrange an electromagnetic coil outside the upper magnetic isolation sleeve;

[0031] S8. Select a connector, and fix the connector outside the housing. Fix the electromagnetic coil and the internal damping air valve assembly inside the housing to obtain an electromagnetic damping valve device.

[0032] By adopting the above technical scheme, the steps of loading the moving iron core and the preload spring, installing the moving iron seat, fixing the front-stage valve, etc. form a modular assembly step, which simplifies the assembly process, reduces the assembly difficulty, improves the assembly speed and quality, avoids the problem of tight fitting installation by a press in the past, and provides the possibility for realizing an automated assembly line. In addition, through techniques such as threaded connection and riveting fixation, each component is first independently assembled into modules in batches, and then installed on the subsequent automated assembly line, which reduces the dependence on high-precision processing, reduces costs, and improves assembly efficiency.

[0033] The above-mentioned assembly method of the electromagnetic damping valve device of a shock absorber can be further set as follows: the step S1 also includes attaching a Teflon film to the outer circumferential surface of the moving iron core and then installing it in the upper magnetic isolation sleeve, the front-stage valve in the step S3 includes a pin seat, a pin and a pin valve plate arranged between the pin seat and the pin, the pin seat fixes the pin and the pin valve plate in the pin seat through a four-point riveting process, the step S4 also includes installing a first magnetic isolation sealing ring on the outside of the lower magnetic isolation sleeve and then threading it with the upper magnetic isolation sleeve, the valve ring seat in the step S6 includes a valve stem inserted in the valve ring seat and a damping valve plate group sleeved on the outer circumferential surface of the valve stem, one end of the valve stem passes through the valve ring seat and is then sleeved with the damping valve plate group, and then the damping valve plate group is pressed against the surface of the first damping channel of the valve ring seat, and the other end is riveted and fixed to the valve ring seat, and the step S7 also includes installing a second magnetic isolation sealing ring on the outside of the lower magnetic isolation sleeve and then installing it into the shell.

[0034] The above-mentioned technical scheme, including the attachment of Teflon film to the outer peripheral surface of the moving iron core, the four-point riveting process of the ejector seat, and the installation of a magnetic-isolating sealing ring, are all solutions proposed for specific problems. The use of Teflon film reduces friction and improves the smoothness of the movement of the moving iron core; the four-point riveting process ensures the close fit between the ejector seat and the ejector valve plate, and improves the sealing and stability of the front-stage valve; the installation of a magnetic-isolating sealing ring further improves the sealing performance between components. These measures work together to improve the accuracy of assembly, reduce errors in the assembly process, ensure the long-term reliability of the product, and ensure the stability and durability of the shock absorber electromagnetic damping valve device under various working conditions.

[0035] The beneficial effects of the present invention are:

[0036] 1. Simplify the assembly process: Compared with the moving iron seat mentioned in the background technology that needs to be installed with a tight fit, the present invention adopts a moving iron seat that is installed with a loose fit, which cooperates with the first limiting part, significantly reduces the assembly difficulty and the demand for high-precision processing, and improves the assembly speed.

[0037] 2. Improve assembly accuracy: The separately arranged magnetic isolation sleeve and the external guide design of the moving iron core reduce the friction caused by the tilt of the moving iron core, avoid the cumulative tolerance problem mentioned in the background technology, and improve the assembly accuracy.

[0038] 3. Reduce costs: Using Teflon film instead of traditional bushings reduces material and processing costs. At the same time, due to the simplification of the assembly process, it reduces dependence on professional assembly tools, further reducing production costs.

[0039] 4. Optimize preload force adjustment: The present invention adopts a single spring structure instead of a double spring series structure, which simplifies the preload force adjustment process, reduces force fluctuations caused by inconsistent spring stiffness, and improves the adjustment stability and accuracy of the damping valve.

[0040] 5. Enhance the reliability of electromagnetic control: By setting the preload spring, the closing force of the front valve can be maintained even when the electromagnetic coil is not energized, avoiding the problems of damping valve leakage and performance degradation mentioned in the background technology.

[0041] 6. Improve the flexibility of damping force adjustment: Through the design of the valve ring damping adjustment component, fine adjustment of the damping force is achieved, the response speed and adjustment accuracy of the shock absorber are improved, and the shock absorption performance is optimized.

[0042] 7. Improve the convenience of maintenance and replacement: The use of threaded connection makes the disassembly and assembly of magnetic isolation sleeves, valve ring seats and other components more convenient and quick, which facilitates subsequent maintenance and replacement work.

[0043] 8. Adapt to automated assembly: Modular assembly steps and simplified processes make automated assembly possible, helping to improve production efficiency and reduce labor costs.

[0044] 9. Improved shock absorption performance: Compared with the prior art, the present invention effectively improves the performance of the shock absorber under different working conditions by precisely controlling the damping force, thereby enhancing ride comfort and vehicle handling stability.

[0045] 10. Enhanced durability and reliability: Through optimized assembly methods and material selection, the overall durability and reliability of the shock absorber electromagnetic damping valve device are enhanced, which helps to extend product service life and reduce failure rate.

[0046] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a cross-sectional schematic diagram of embodiment 1 of the present invention.

[0048] Figure 2 Schematic diagram of the assembly process of Example 1 of the present invention Figure 1 .

[0049] Figure 3 Schematic diagram of the assembly process of Example 1 of the present invention Figure 2 .

[0050] Figure 4 It is a cross-sectional schematic diagram of embodiment 2 of the present invention. DETAILED DESCRIPTION

[0051] Embodiment 1:

[0052] like Figure 1-Figure 3As shown, a shock absorber electromagnetic damping valve device includes a damping valve device body, the damping valve device body includes a shell 1, a front-stage valve 2 and a main-stage valve 3, the shell 1 is provided with a front-stage valve actuator for controlling the front-stage valve to adjust the closing pressure corresponding to the front-stage valve 2, the closing pressure acts on the axially movable main-stage valve 3, the front-stage valve actuator includes a moving iron core 4 connected to the front-stage valve 2, an upper magnetic isolation sleeve 5 arranged on the outer circumference of the moving iron core 4, a moving iron seat 6 arranged at the front end of the moving iron core 4 and an electromagnetic coil 51 sleeved on the outer circumference of the upper magnetic isolation sleeve 5, and the end of the moving iron core 4 away from the front-stage valve 2 is provided with a spring accommodating chamber for accommodating a preload spring 41 42, one end of the moving iron core 4 is against the upper magnetic isolation sleeve 5 through a preload spring 41, and the other end is extended out of the moving iron seat 6 and fixedly connected to the front stage valve 2, a Teflon film is provided between the moving iron core 4 and the upper magnetic isolation sleeve 5, and a connector 10 detachably connected to the shell 1 is provided on the outside of the upper magnetic isolation sleeve 5, and the front stage valve 2 includes an ejector seat 21 connected to the moving iron core 4, an ejector 22, and an ejector valve plate 23 arranged between the ejector seat 21 and the ejector 22, one end of the ejector 22 is against the main stage valve 3, and the other end is against the ejector valve plate 23, the ejector seat 21 fixes the ejector 22 and the ejector valve plate 23 in the ejector seat 21 through a four-point riveting process, and the shell The body 1 is provided with a lower magnetic isolation sleeve 7 which is threadedly connected to the upper magnetic isolation sleeve 5 through a first threaded portion 71. The lower magnetic isolation sleeve 7 is provided with a first limiting portion 72 which abuts against the moving iron seat 6 toward the upper magnetic isolation sleeve 5. The upper magnetic isolation sleeve 5 is provided with a first moving iron positioning step 50 corresponding to the moving iron seat 6. One end of the moving iron seat 6 abuts against the first limiting portion 72, and the other end abuts against the first moving iron positioning step 50, and cooperates with the upper magnetic isolation sleeve 5 to form a moving iron active cavity 501 for the moving iron core 4 to move axially therein. The main-stage valve 3 is movably installed in the lower magnetic isolation sleeve 7, and after passing through the lower magnetic isolation sleeve 7, it abuts against the front-stage valve 2. The bottom of the lower magnetic isolation sleeve 7 is provided with a second The threaded portion 73 is threadedly connected with a valve ring seat 8, and the second threaded portion 73 has an adjustment step 731 at one end facing the main-stage valve 3. The adjustment step 731 enables the valve ring seat 8 to have an additional adjustment space, thereby controlling the height position of the main-stage valve 3. The moving iron core 4, the main-stage valve 3, and the front-stage valve 2 are all coaxially arranged in the housing 1. One end of the lower magnetic isolation sleeve 7 is provided with a front-stage cavity 701 for the front-stage valve 2 to float therein, and the other end is provided with a main-stage cavity 30 formed in cooperation with the valve ring seat 8 for the main-stage valve 3 to move therein. The outer peripheral surface of the valve ring seat 8 is arranged to abut against the main-stage valve 3, and the floating range of the main-stage valve 3 in the main-stage cavity 30 is controlled by rotating the valve ring seat 8;

[0053] like Figure 1-Figure 3As shown, the present invention adopts a single spring structure instead of a double spring series structure, simplifies the adjustment process of the preload force, reduces the force fluctuation caused by inconsistent spring stiffness, and improves the adjustment stability and accuracy of the damping valve. For example, when the moving iron core 4 needs a preload force with a stiffness of 5.1N / mm, the original double spring series structure needs to be designed with a stiffness of 8 for the upper spring and a stiffness of 14 for the lower spring according to the calculation formula ((K1*K2) / (K1+K2)=composite stiffness K). Then, after assembly, the composite stiffness is (8*14) / (8+14)=5.1. The fluctuation range caused by the superposition of the tolerances of the double springs in this design is larger than that of the single spring. The single spring only needs to select a single preload spring with a stiffness of 5.1N / mm to achieve the same preload force.

[0054] like Figure 2 , Figure 3 As shown, the moving iron seat 6 is loosely sleeved outside the moving iron core 4 and is installed in the upper magnetic isolation sleeve 5 through the first limit part 72. The center of the moving iron seat 6 is provided with a front-stage floating chamber 61 for the front-stage valve 2 to enter or leave. The valve ring seat 8 is provided with a valve ring damping adjustment component, and the valve ring damping adjustment component includes a valve stem 81 inserted in the valve ring seat 8, a damping valve plate group 82 sleeved on the outer peripheral surface of the valve stem 81, and a first damping channel 83 opened on the valve ring seat 8 and connected to the main stage chamber 30. One end of the valve stem 81 passes through the valve ring seat 8 and is sleeved with the damping valve plate group 82, and then the damping valve plate group 82 is pressed on the surface of the first damping channel 83, and the other end is riveted and connected to the valve ring seat 8. The lower magnetic isolation sleeve 7 is provided with a damping valve plate group 82 connected to the front stage chamber 701. A first circulation channel 74 is connected, and a second circulation channel 84 on the valve ring seat 8 is connected to the first circulation channel 74. The valve ring seat 8 and the main-stage valve 3 are used to control the disconnection or connection of the second circulation channel 84 and the first circulation channel 74. One end of the lower magnetic isolation sleeve 7 corresponding to the front-stage valve 2 is provided with a guide hole 70 for the central axis 31 of the main-stage valve 3 to pass through. The central axis 31 is provided with an axial channel 32 corresponding to the front-stage valve 2, and a transverse channel 33 is arranged on the main-stage valve 3 to connect the axial channel 32 and the main-stage cavity 30. The outer wall of the main-stage valve 3 slides against the lower magnetic isolation sleeve 7, and a main-stage sealing ring 34 is provided therebetween. The first magnetic isolation sealing ring 75 and the second magnetic isolation sealing ring 76 are respectively installed at both ends of the outer side of the lower magnetic isolation sleeve 7;

[0055] like Figure 2 , Figure 3 As shown, a method for assembling a shock absorber electromagnetic damping valve device comprises the following steps:

[0056] S1. Assembly of the moving iron core: attach the Teflon film to the outer circumference of the moving iron core to reduce friction and wear, then put the moving iron core loaded with the preload spring into the upper magnetic isolation sleeve, and make the preload spring against the upper magnetic isolation sleeve;

[0057] S2. Assembly of the moving iron seat: loosely install the moving iron seat in the upper magnetic isolation sleeve, and the center sleeve is arranged outside the moving iron core, so that the moving iron seat and the upper magnetic isolation sleeve cooperate to form a moving iron accommodating cavity for the moving iron core to move inside;

[0058] S3, front stage valve assembly: the ejector pin and ejector pin valve plate are fixed on the ejector pin seat by four-point riveting process;

[0059] S4. Assembly of the front-stage valve assembly: Press and install the ejector pin seat of the front-stage valve on the moving iron core, with the ejector pin facing the end away from the moving iron core;

[0060] S5. Assembling the lower magnetic isolation sleeve: installing the first magnetic isolation sealing ring on the outside of the lower magnetic isolation sleeve, and then threading the first threaded portion of the lower magnetic isolation sleeve with the upper magnetic isolation sleeve, so that the first limit portion of the lower magnetic isolation sleeve abuts against the upper magnetic isolation sleeve and the moving iron seat respectively, and the moving iron seat is fixedly installed in the lower magnetic isolation sleeve, and the magnetic isolation sealing ring is arranged between the upper magnetic isolation sleeve and the lower magnetic isolation sleeve;

[0061] S6. Main stage valve assembly: install the main stage sealing ring on the outside of the main stage valve, then pass the central axis of the main stage valve through the guide hole of the lower magnetic isolation sleeve and abut against the ejector pin of the previous stage valve, ensure that the outer peripheral surface of the main stage valve abuts and slides against the inner wall of the lower magnetic isolation sleeve, and the main stage sealing ring is set between the main stage valve and the lower magnetic isolation sleeve;

[0062] S7, valve ring seat assembly: the damping valve plate group is sleeved and installed on the outer peripheral surface of the valve stem in the valve ring seat, and is limited by the spring seat at the end, and then the valve stem passes through the valve ring seat and is fixed with the valve ring seat by riveting, so that the damping valve plate group is pressed on the surface of the first damping channel of the valve ring seat to form the valve ring seat;

[0063] S8, valve ring seat assembly: thread the outer wall of the valve ring seat with the second threaded part of the lower magnetic isolation sleeve, movably install the main stage valve in the lower magnetic isolation sleeve, and abut against the end of the main stage valve, ensure that the moving iron core, the main stage valve, and the front stage valve are coaxially arranged, and then adjust the preload force of the main stage valve by rotating the valve ring seat to obtain an internal damping valve assembly;

[0064] S9, electromagnetic coil assembly: install the second magnetic isolation seal ring on the outside of the lower magnetic isolation sleeve, then put the internal damping valve assembly into the housing, and install the electromagnetic coil on the outer surface of the upper magnetic isolation sleeve to ensure that the position of the electromagnetic coil corresponds to the moving iron core to achieve electromagnetic control;

[0065] S10, connector assembly: the connector 10 is fixedly mounted outside the housing 1, and the clamping spring 101 of the connector 10 is inserted into the inner groove of the housing 1 to complete the assembly, thereby completing the assembly of the entire electromagnetic damping valve device.

[0066] Embodiment 2:

[0067] like Figure 4As shown, the difference between Example 2 and Example 1 is: Step S10, connector assembly: the connector 10 is fixedly installed outside the housing 1, and the connector 10 is pressed onto the magnetic isolation sleeve through the injection molding cover 102 to complete the assembly, thereby completing the assembly of the entire electromagnetic damping valve device.

Claims

1. A shock absorber electromagnetic damping valve device, comprising a damping valve device body, the damping valve device body comprising a housing, a front-stage valve and a main-stage valve, the housing corresponding to the front-stage valve is provided with a front-stage valve actuator for controlling the front-stage valve to adjust the closing pressure, the closing pressure acts on the axially movable main-stage valve, characterized in that: The front-stage valve actuator assembly includes a moving iron core connected to the front-stage valve, an upper magnetic isolation sleeve arranged on the outer circumference of the moving iron core, a moving iron seat arranged at the front end of the moving iron core, and an electromagnetic coil sleeved on the outer circumference of the upper magnetic isolation sleeve. One end of the moving iron core is abutted against the upper magnetic isolation sleeve through an elastic member, and the other end is extended out of the moving iron seat and fixedly connected to the front-stage valve. The shell is provided with a lower magnetic isolation sleeve that is detachably connected to the upper magnetic isolation sleeve, and the end of the lower magnetic isolation sleeve facing the upper magnetic isolation sleeve is provided with a first limiting portion abutting against the moving iron seat. The upper magnetic isolation sleeve is provided with a first moving iron positioning step at a position corresponding to the moving iron seat. One end of the moving iron seat abuts against the first limiting portion, and the other end abuts against the first moving iron positioning step, and cooperates with the upper magnetic isolation sleeve to form a moving iron activity cavity for the moving iron core to move axially therein. The main-stage valve is movably installed at The lower magnetic isolation sleeve is inside the lower magnetic isolation sleeve, and after passing through the lower magnetic isolation sleeve, it is set against the front-stage valve. A valve ring seat is provided at the bottom of the lower magnetic isolation sleeve. The moving iron core, the main-stage valve and the front-stage valve are all coaxially arranged in the shell. One end of the lower magnetic isolation sleeve is provided with a front-stage cavity for the front-stage valve to float inside, and the other end is provided with a main-stage cavity that cooperates with the valve ring seat to form a main-stage cavity for the main-stage valve to move inside. The front-stage valve actuator adopts a single elastic part structure to simplify the preload force adjustment process. One end of the lower magnetic isolation sleeve is provided with a first threaded portion threadedly connected to the upper magnetic isolation sleeve, and the other end is provided with a second threaded portion threadedly connected to the valve ring seat. The second threaded portion has an adjustment step facing one end of the main-stage valve. The outer peripheral surface of the valve ring seat is set against the main-stage valve, and the floating range of the main-stage valve in the main-stage cavity is controlled by rotating the valve ring seat.

2. The electromagnetic damping valve device of a shock absorber according to claim 1, characterized in that: The second moving iron positioning step is arranged in the middle of the moving iron seat and cooperates with the inner wall of the upper magnetic isolation sleeve to further limit the axial position of the moving iron seat.

3. The electromagnetic damping valve device of a shock absorber according to claim 2, characterized in that: The outer circumferential surface of the moving iron core slides against the inner wall of the upper magnetic isolation sleeve, the elastic member is a preload spring, and a spring accommodating chamber for accommodating the preload spring is provided at one end of the moving iron core away from the front-stage valve. One end of the preload spring abuts against the upper magnetic isolation sleeve, and the other end abuts against the moving iron core, thereby applying preload closing pressure to the front-stage valve.

4. The electromagnetic damping valve device for a shock absorber according to claim 3, characterized in that: A Teflon film is arranged between the moving iron core and the upper magnetic isolation sleeve, and a connector which is detachably connected to the shell is arranged outside the upper magnetic isolation sleeve.

5. The electromagnetic damping valve device for a shock absorber according to claim 3, characterized in that: The movable iron seat is loosely sleeved outside the movable iron core and installed in the upper magnetic isolation sleeve through a first limiting portion. A front-stage floating cavity for the front-stage valve to enter or leave is arranged at the center of the movable iron seat.

6. A shock absorber electromagnetic damping valve device according to any one of claims 1 to 5, characterized in that: The valve ring seat is provided with a valve ring damping adjustment component, which includes a valve stem inserted in the valve ring seat, a damping valve plate group sleeved on the outer peripheral surface of the valve stem, and a first damping channel opened on the valve ring seat and connected to the main stage chamber. One end of the valve stem passes through the valve ring seat and is sleeved with the damping valve plate group, so that the damping valve plate group is pressed against the surface of the first damping channel, and the other end is fixedly connected to the valve ring seat. A first circulation channel connected to the front stage chamber is provided in the lower magnetic isolation sleeve, and a second circulation channel connected to the first circulation channel is provided on the valve ring seat. The valve ring seat and the main stage valve are used to control the disconnection or connection of the second circulation channel and the first circulation channel.

7. The electromagnetic damping valve device of a shock absorber according to any one of claims 1 to 5, characterized in that: The front-stage valve includes an ejector seat connected to the moving iron core, an ejector, and an ejector valve plate arranged between the ejector seat and the ejector pin. One end of the ejector pin abuts against the main-stage valve, and the other end abuts against the ejector valve plate. The ejector seat fixes the ejector pin and the ejector valve plate in the ejector seat by a riveting process.

8. The electromagnetic damping valve device of a shock absorber according to claim 6, characterized in that: One end of the lower magnetic isolation sleeve corresponding to the front-stage valve is provided with a guide hole for the central axis of the main-stage valve to pass through, and the central axis is provided with an axial channel corresponding to the front-stage valve, and a transverse channel is arranged on the main-stage valve to connect the axial channel and the main-stage cavity. The outer wall of the main-stage valve slides against the lower magnetic isolation sleeve, and a main-stage sealing ring is provided therebetween.

9. An assembly method for a shock absorber electromagnetic damping valve device according to any one of claims 1 to 5, characterized in that: The steps include: S1. Select the upper magnetic isolation sleeve, place the moving iron core loaded with the preload spring into the upper magnetic isolation sleeve, and make the preload spring abut against the upper magnetic isolation sleeve; S2. Select a moving iron seat, loosely install the moving iron seat in the upper magnetic isolation sleeve, and set the center sleeve outside the moving iron core, so that the moving iron seat and the upper magnetic isolation sleeve cooperate to form a moving iron accommodating cavity for the moving iron core to move inside; S3. Select a fore-stage valve, press and install the ejector pin seat of the fore-stage valve on the moving iron core, and make the ejector pin on the fore-stage valve face the end away from the moving iron core; S4, select a lower magnetic isolation sleeve, and thread the lower magnetic isolation sleeve with the upper magnetic isolation sleeve through the first threaded portion of the lower magnetic isolation sleeve, so that the first limit portion of the lower magnetic isolation sleeve abuts against the upper magnetic isolation sleeve and the moving iron seat respectively, and the moving iron seat is fixedly installed in the lower magnetic isolation sleeve; S5. Select the main stage valve, pass the central axis of the main stage valve through the guide hole and abut against the ejector pin of the front stage valve, and slide along the outer peripheral surface of the main stage valve against the inner wall of the lower magnetic isolation sleeve; S6. Select a valve ring seat, thread the outer wall of the valve ring seat to the second threaded portion of the lower magnetic isolation sleeve, movably install the main stage valve in the lower magnetic isolation sleeve and abut against the end of the main stage valve, adjust the preload force of the main stage valve by rotating the valve ring seat, and obtain an internal damping valve assembly; S7, select a housing and an electromagnetic coil, place the inner damping valve assembly into the housing, and arrange an electromagnetic coil outside the upper magnetic isolation sleeve; S8. Select a connector, and fix the connector outside the housing. Fix the electromagnetic coil and the internal damping air valve assembly inside the housing to obtain an electromagnetic damping valve device.

10. The assembly method of the electromagnetic damping valve device of a shock absorber according to claim 9, characterized in that: The step S1 also includes attaching a Teflon film to the outer circumferential surface of the moving iron core and then installing it in the upper magnetic isolation sleeve. The front-stage valve in the step S3 includes a pin seat, a pin and a pin valve plate arranged between the pin seat and the pin. The pin seat fixes the pin and the pin valve plate in the pin seat through a four-point riveting process. The step S4 also includes installing a first magnetic isolation sealing ring on the outside of the lower magnetic isolation sleeve and then threading it with the upper magnetic isolation sleeve. The valve ring seat in step S6 includes a valve stem inserted in the valve ring seat and a damping valve plate group sleeved on the outer circumferential surface of the valve stem. One end of the valve stem passes through the valve ring seat and is then sleeved with the damping valve plate group, and then the damping valve plate group is pressed against the surface of the first damping channel of the valve ring seat, and the other end is riveted and fixed to the valve ring seat. The step S7 also includes installing a second magnetic isolation sealing ring on the outside of the lower magnetic isolation sleeve and then installing it into the shell.

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