Continuously adjustable damping regulating valve

Abstract

The invention discloses a continuously-adjustable damping adjusting valve, and aims to provide a continuously-adjustable damping adjusting valve which not only can realize continuous adjustment of different dampers of a shock absorber, but also can effectively reduce the manufacturing cost, reduce the structural size and reduce the occupied space of a vehicle body. The high-speed switch valve comprises a high-speed switch valve and an overflow valve, the overflow valve comprises a main valve body, an oil inlet and an oil outlet, and a main valve element and an overflow valve cavity are arranged in the main valve body; the high-speed switch valve comprises a switch valve body, a switch valve seat and an electromagnetic control assembly, a pilot valve cavity is formed in the switch valve body and communicated with the overflow valve cavity, a controllable throttling hole is formed in the switch valve seat, a long-through damping hole is formed in the switch valve seat or the switch valve body, one end of the controllable throttling hole and one end of the long-through damping hole are communicated with the pilot valve cavity, and the other end of the long-through damping hole is communicated with the electromagnetic control assembly. The other end of the controllable throttling hole and the other end of the long through damping hole are communicated with an oil discharge port through oil ducts; the electromagnetic control assembly comprises a control valve rod for controlling the flow area of the controllable throttling hole.

Description

Technical Field

[0001] The invention relates to the technical field of valves in a vehicle suspension system, and in particular to a continuously adjustable damping regulating valve. Background Art

[0002] Shock absorbers are an important part of the automobile suspension system. They are used to absorb vibrations and are the key to suppressing impacts when springs bounce after road impacts. The performance of shock absorbers directly affects the performance of the suspension system, thereby affecting the ride comfort and handling stability of the car. Ride comfort and handling stability are contradictory to a certain extent. Ride comfort requires the shock absorber to provide a smaller damping force, while handling stability requires the shock absorber to provide a larger damping force. When the damping force of the shock absorber is large, the maneuverability of the automobile suspension is better, but the ride comfort will be reduced. It is suitable for flat roads and other conditions, which is conducive to reducing the body bounce. When the damping force of the shock absorber is small, the ride comfort of the car is improved, but the handling performance will decrease accordingly, which is suitable for rugged road conditions.

[0003] To solve these problems, the shock absorber needs to have adjustable capabilities, that is, adjustable shock absorbers. Adjustable shock absorbers can select appropriate damping coefficients according to changes in factors such as road conditions and vehicle speed to meet the needs of different road conditions and achieve a balance between maneuverability and comfort. At present, the mainstream adjustable shock absorbers on the market are almost monopolized by foreign countries. Its core component is the proportional solenoid valve. The proportional solenoid valve is used as the pilot valve of the pilot relief valve. Through high-precision valve core position control, the continuous change of the throttle hole flow area is achieved, thereby controlling the pressure of the pilot chamber to control the opening of the main valve core of the relief valve, and adjusting the damping size of the shock absorber through the amount of overflow oil; and further, the different pressures of the pilot chamber are controlled by the size of the given current, and then the size of the opening of the main valve core of the relief valve is controlled to achieve different damping adjustments.

[0004] The proportional solenoid valve currently used in the adjustable shock absorber is used as the pilot valve of the pilot overflow valve. Although it can achieve the adjustment of different damping, it has the following shortcomings. On the one hand, the proportional solenoid valve has a complex structure, is difficult to manufacture, has a large structural size, and has a high manufacturing cost, thereby increasing the production cost and increasing the space occupied by the vehicle body; on the other hand, the inventor found through studying the PQ characteristic curve of the shock absorber (P is the pressure of the shock absorber, and Q is the flow of the shock absorber) that on a flat road and under low Q conditions, the P rising and falling rate is relatively slow (the slower the P rising and falling rate, the corresponding shock absorber damping rising and falling rate is relatively slow), which is not conducive to improving the maneuverability; while on a flat road condition, the vehicle body bounce itself is relatively small, and we instead hope to increase the damping force of the shock absorber to improve the maneuverability. Summary of the invention

[0005] The first purpose of the present invention is to provide a continuously adjustable damping regulating valve which can not only realize continuous adjustment of different damping of the shock absorber, but also effectively reduce the manufacturing cost, reduce the structural size, and reduce the space occupied by the vehicle body.

[0006] Another object of the present invention is to provide a continuously adjustable damping regulating valve that can improve maneuverability on flat roads and under low-flow conditions of the shock absorber, and achieve a new balance between maneuverability and comfort on flat roads and under low-flow conditions of the shock absorber.

[0007] The technical solution of the present invention is: A continuously adjustable damping regulating valve comprises a high-speed switch valve and a relief valve, wherein the relief valve comprises a main valve body, an oil inlet and an oil outlet, and a main valve core and a relief valve cavity are arranged in the main valve body; The high-speed switch valve includes a switch valve body, a switch valve seat and an electromagnetic control component. The switch valve body is arranged on the main valve body. A pilot valve chamber is arranged in the switch valve body. The pilot valve chamber is connected to the overflow valve chamber. A controllable throttling hole is arranged on the switch valve seat. A long-pass damping hole is arranged on the switch valve seat or the switch valve body. One end of the controllable throttling hole and one end of the long-pass damping hole are respectively connected to the pilot valve chamber, and the other end of the controllable throttling hole and the other end of the long-pass damping hole are connected to the oil drain port through the oil channel; the electromagnetic control component includes a control valve stem that controls the flow area of ​​the controllable throttling hole. The continuously adjustable damping regulating valve of this scheme adopts a high-speed switch valve to replace the proportional solenoid valve, and at the same time, a long-pass damping hole is arranged on the switch valve seat or the switch valve body, and the long-pass damping hole is arranged in parallel with the controllable throttling hole; in this way, not only can the continuous adjustment of different damping of the shock absorber be realized, but also the manufacturing cost can be effectively reduced, the structural size can be reduced, and the space occupied by the vehicle body can be reduced. Specifically, The electromagnetic control component is energized, and the flow area of ​​the controllable throttle hole is controlled by controlling the movement of the valve stem, so that the flow area of ​​the controllable throttle hole is continuously changed by controlling the size of the given current, and then the change of the pressure in the pilot valve cavity is controlled to control the opening of the main valve core of the overflow valve, and the damping size of the shock absorber is adjusted by the amount of overflow oil to achieve different damping adjustments. Compared with the proportional solenoid valve, the high-speed switch valve has the characteristics of small structure size and low manufacturing cost, so it can effectively reduce the manufacturing cost, reduce the structure size, and reduce the space required for the vehicle body.

[0008] On the other hand, the continuously adjustable damping regulating valve of the present scheme adopts a high-speed switching valve to replace the proportional solenoid valve, and at the same time a long-through damping hole is arranged on the switching valve seat or the switching valve body, and the long-through damping hole is arranged in parallel with the controllable throttling hole; by analyzing the PQ characteristic curve (P is the pressure of the shock absorber, and Q is the flow rate of the shock absorber) of the shock absorber adopting the continuously adjustable damping regulating valve of the present scheme, it can be obtained that under low Q conditions, the P rising and falling rate can be effectively improved, thereby increasing the damping force of the shock absorber under low Q conditions and improving maneuverability, while also maintaining moderate comfort requirements to adapt to flat road conditions, the body bounce itself is relatively small, and a new balance between maneuverability and comfort under low Q conditions is achieved.

[0009] Preferably, the electromagnetic control assembly also includes a valve stem reset spring. When the electromagnetic control assembly is powered off, the valve stem reset spring drives the control valve stem to reset so that the flow area of ​​the controllable throttle hole reaches the maximum; when the electromagnetic control assembly is powered on, the control valve stem moves toward the controllable throttle hole so that the flow area of ​​the controllable throttle hole decreases; and as the current passed into the electromagnetic control assembly increases, the flow area of ​​the controllable throttle hole gradually decreases until it is closed. In this way, when the electromagnetic control assembly loses power, the flow area of ​​the controllable throttle hole reaches the maximum, the pressure in the pilot valve cavity is low, and the corresponding pressure in the overflow valve cavity connected to it is also low, providing a smaller shock absorption damping, which is a small damping safety protection provided by the valve to the vehicle shock absorption system when the power is off or the control line fails.

[0010] Preferably, a switch valve seat mounting hole is provided on the switch valve body, the switch valve seat is interference fit with the switch valve seat mounting hole, a long through groove is provided on the inner wall of the switch valve seat mounting hole, the long through groove runs through both ends of the switch valve seat mounting hole, and the long through groove constitutes the long through damping hole. In this way, on the one hand, part of the switch valve body can be accommodated in the main valve body, thereby further reducing the volume of the continuously adjustable damping regulating valve and reducing the space it occupies; on the other hand, the long through damping hole is arranged on the inner wall of the switch valve seat mounting hole, which is convenient for the actual processing and manufacturing of the long through damping hole.

[0011] Preferably, the switch valve body is provided with a switch valve seat mounting hole, the switch valve seat is interference fit with the switch valve seat mounting hole, and the outer wall of the switch valve seat is provided with a long through groove, the long through groove runs through both ends of the switch valve seat, and the long through groove constitutes the long through damping hole. In this way, on the one hand, part of the switch valve body can be accommodated in the main valve body, thereby further reducing the volume of the continuously adjustable damping regulating valve and reducing the space it occupies; on the other hand, the long through damping hole is arranged on the outer wall of the switch valve seat, which is convenient for the actual processing and manufacturing of the long through damping hole.

[0012] Preferably, a switch valve body mounting hole is provided at one end of the main valve body, the switch valve body is arranged in the switch valve body mounting hole, and the switch valve body and the switch valve body mounting hole are interference fit. Part of the switch valve body is accommodated in the main valve body, thereby further reducing the volume of the continuously adjustable damping regulating valve and reducing the space it occupies.

[0013] Preferably, a switch valve seat mounting hole is provided on one end of the switch valve body facing the bottom surface of the switch valve body mounting hole, and an expansion hole is provided on the switch valve seat mounting hole facing the bottom surface of the switch valve body mounting hole, the expansion hole constitutes the pilot valve cavity, and the switch valve seat and the switch valve seat mounting hole are interference fit. In this way, the processing and manufacturing of the pilot valve cavity is facilitated, and one end of the controllable throttling hole and one end of the long-pass damping hole on the switch valve seat can be directly connected to the pilot valve cavity, which is convenient for actual processing and manufacturing.

[0014] Preferably, a conical control port is provided at one end of the controllable throttling hole facing the control valve stem, and a hemispherical protrusion or a conical protrusion matching with the conical control port is provided at one end of the control valve stem facing the controllable throttling hole.

[0015] Preferably, the relief valve further comprises a main valve seat and a main valve spring, the main valve core is slidingly and sealingly connected to the relief valve chamber, and the main valve core rests on the main valve seat under the action of the main valve spring so that the main valve core is sealingly connected to the main valve seat.

[0016] Preferably, the oil inlet is arranged on the main valve seat, the oil outlet is arranged on the main valve body, and the main valve core is provided with a main valve throttling hole connecting the oil inlet and the overflow valve chamber.

[0017] Preferably, the overflow valve further comprises a main valve seat, the switch valve body is arranged at one end of the main valve body, and the main valve seat is arranged at the other end of the main valve body. This optimizes the arrangement of the switch valve body and the main valve seat, which is conducive to improving the structural compactness of the continuously adjustable damping regulating valve and reducing the space it occupies.

[0018] The beneficial effects of the present invention are: Firstly, it can not only realize the continuous adjustment of different damping of the shock absorber, but also effectively reduce the manufacturing cost, reduce the structural size, and reduce the space occupied by the vehicle body.

[0019] Secondly, it can improve the maneuverability on flat roads and under low shock absorber flow conditions, and achieve a new balance between maneuverability and comfort on flat roads and under low shock absorber flow conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional structural schematic diagram of an implementation mode of a continuously adjustable damping control valve of the present invention.

[0021] Figure 2It is a cross-sectional structural schematic diagram of another embodiment of a continuously adjustable damping control valve of the present invention.

[0022] Figure 3 It is a cross-sectional structural schematic diagram of a third implementation mode of a continuously adjustable damping control valve of the present invention.

[0023] Figure 4 It is a schematic diagram of the PQ characteristic curve of the shock absorber using different valves.

[0024] Figure 5 The present invention is a schematic diagram of a PQ characteristic curve of a shock absorber using a continuously adjustable damping regulating valve of the present invention.

[0025] In the figure: Overflow valve 1, main valve body 1.1, main valve seat 1.2, oil inlet 1.3, oil outlet 1.4, overflow valve cavity 1.5, main valve core 1.6, main valve throttle hole 1.7, main valve spring 1.8, connecting oil hole 1.9, external oil hole 1.10; High-speed on-off valve 2, on-off valve body 2.1, on-off valve seat 2.2, pilot valve chamber 2.3, controllable throttling hole 2.4, control valve stem 2.5, valve stem return spring 2.6, valve stem insertion hole 2.7, inner oil hole 2.8, annular groove 2.9; Long-pass damping hole 3. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: Specific embodiment 1, as Figure 1 As shown, a continuously adjustable damping regulating valve comprises a high-speed switch valve 2 and a relief valve 1. The relief valve 1 comprises a main valve body 1.1, a main valve seat 1.2, a main valve spring 1.8, an oil inlet 1.3 and an oil discharge port 1.4. A main valve core 1.6 and an oil discharge valve chamber 1.5 are arranged in the main valve body 1.1. The main valve core 1.6 is connected to the oil discharge valve chamber 1.5 in a sliding and sealing manner. The oil inlet 1.3 is arranged on the main valve seat 1.2. The oil discharge port 1.4 is arranged on the main valve body 1.1. A main valve throttle hole 1.7 connecting the oil inlet 1.3 and the relief valve chamber 1.5 is arranged on the main valve core 1.6. The main valve core 1.6 is pressed against the main valve seat 1.2 under the action of the main valve spring 1.8, so that the main valve core 1.6 is sealed and connected to the main valve seat 1.2; at this time, the relief valve 1 is in a closed state, and the oil inlet 1.3 is not connected to the oil discharge port 1.4.

[0027] The high-speed switch valve 2 includes a switch valve body 2.1, a switch valve seat 2.2 and an electromagnetic control assembly. The switch valve body 2.1 is arranged on the main valve body 1.1. A pilot valve chamber 2.3 is arranged in the switch valve body 2.1. The pilot valve chamber 2.3 is connected to the overflow valve chamber 1.5. A controllable throttling hole 2.4 is arranged on the switch valve seat 2.2. A long-pass damping hole 3 is arranged on the switch valve seat 2.2 or the switch valve body 2.1. One end of the controllable throttling hole 2.4 is connected to the pilot valve chamber 2.3, and the other end of the controllable throttling hole 2.4 is connected to the oil discharge port 1.4 through the oil channel. One end of the long-pass damping hole 3 is connected to the pilot valve chamber 2.3, and the other end of the long-pass damping hole 3 is also connected to the oil discharge port 1.4 through the oil channel. The controllable throttling hole 2.4 and the long-pass damping hole 3 are arranged in parallel.

[0028] The electromagnetic control component includes a control valve stem 2.5 that controls the flow area of ​​the controllable throttle hole 2.4. The electromagnetic control component controls the movement of the control valve stem 2.5 by a given current to continuously change the flow area of ​​the controllable throttle hole 2.4. The coil and other structures of the electromagnetic control component are not shown in the figure. The specific method and structure of the electromagnetic control component are prior art, and its specific structure is not the invention point of this application, so this application does not elaborate on the specific method and structure of the electromagnetic control component and other conventional technical means.

[0029] The continuously adjustable damping regulating valve of this embodiment adopts a high-speed switch valve 2 to replace the proportional solenoid valve, and a long-through damping hole 3 is arranged on the switch valve seat 2.2 or the switch valve body 2.1, and the long-through damping hole 3 is arranged in parallel with the controllable throttle hole 2.4; in this way, not only can the continuous adjustment of different damping of the shock absorber be achieved, but also the manufacturing cost, structural size and body space can be effectively reduced. Specifically, The electromagnetic control component is energized, and the flow area of ​​the controllable throttle hole 2.4 is controlled by controlling the movement of the valve stem 2.5, so that the flow area of ​​the controllable throttle hole 2.4 is continuously changed by controlling the size of the given current, and then the change of the pressure in the pilot valve chamber 2.3 is controlled (the pilot valve chamber 2.3 is connected to the overflow valve chamber 1.5, and the change of the pressure in the overflow valve chamber 1.5 corresponds to the change of the pressure in the pilot valve chamber 2.3), so as to control the opening of the main valve core 1.6 of the overflow valve 1, and adjust the damping size of the shock absorber by the amount of overflow oil, so as to achieve the adjustment of different damping. Figure 5 As shown in the figure, the currents of I1, I2, and I3 increase in sequence, the flow area of ​​the corresponding controllable throttle hole 2.4 decreases in sequence, the pressure of the overflow valve chamber 1 and the pilot valve chamber 2.3 increases in sequence, and the damping of the corresponding shock absorber increases in sequence. Compared with the proportional solenoid valve, the high-speed switch valve 2 has the characteristics of small structure size and low manufacturing cost, so it can effectively reduce the manufacturing cost, reduce the structure size, and reduce the space of the vehicle body.

[0030] On the other hand, the continuously adjustable damping regulating valve of this embodiment adopts a high-speed switch valve 2 to replace the proportional solenoid valve, and at the same time, a long-pass damping hole 3 is set on the switch valve seat 2.2 or the switch valve body 2.1, and the long-pass damping hole 3 is arranged in parallel with the controllable throttle hole 2.4; it can be obtained that under low Q conditions, it can effectively increase the P lifting rate, thereby increasing the damping force of the shock absorber under low Q conditions and improving the maneuverability, while maintaining moderate comfort requirements to adapt to flat road conditions, the body bounce itself is relatively small, and a new balance between maneuverability and comfort under low Q conditions is achieved. Specifically, See also Figure 4 The PQ characteristic curve diagram shown in the figure (P is the pressure of the shock absorber, Q is the flow rate of the shock absorber), in which curve I is the PQ characteristic curve of the shock absorber using the continuously adjustable damping regulating valve of this embodiment (this curve is the PQ characteristic curve of a given current); curve II is the PQ characteristic curve of the shock absorber using the proportional solenoid valve as the pilot valve in the prior art (this curve is the PQ characteristic curve of a given current); curve III is the PQ characteristic curve of the shock absorber directly using the high-speed switching valve 2 (without the long-through damping hole 3) (this curve is the PQ characteristic curve of a given current); and the given currents in curves I, II and III are consistent. Figure 4 The PQ characteristic curve shown in the figure shows that, compared with the shock absorber using a proportional solenoid valve as a pilot valve in the prior art, the shock absorber using the continuously adjustable damping regulating valve of this embodiment can effectively increase the P rise and fall rate under low Q conditions, thereby increasing the damping force of the shock absorber under low Q conditions and improving the maneuverability; Compared with the shock absorber directly using the high-speed switch valve 2 (without the long-pass damping hole 3), the shock absorber using the continuously adjustable damping regulating valve of this embodiment has a slower rise and fall rate of P under low Q conditions, and can maintain a moderate comfort requirement; Therefore, the shock absorber with the continuously adjustable damping regulating valve of the present embodiment can effectively increase the rising and falling rate of P under low Q conditions, thereby increasing the damping force of the shock absorber under low Q conditions and improving maneuverability; at the same time, it can also maintain moderate comfort requirements to adapt to flat road conditions, with relatively small body bounce itself, achieving a new balance between maneuverability and comfort under low Q conditions.

[0031] In addition, during the actual processing and manufacturing of the continuously adjustable damping control valve, the cross-sectional size of the long-through damping hole 3 can also be adjusted to adjust the overall output characteristics of the continuously adjustable damping control valve to match the requirements of different vehicle models.

[0032] Specific embodiment 2, as Figure 1As shown, a continuously adjustable damping regulating valve comprises a high-speed switch valve 2 and a relief valve 1. The relief valve 1 comprises a main valve body 1.1, a main valve seat 1.2, a main valve spring 1.8, an oil inlet 1.3 and an oil outlet 1.4. A main valve core 1.6 and an overflow valve chamber 1.5 are arranged in the main valve body 1.1. The main valve core 1.6 is connected to the overflow valve chamber 1.5 in a sliding seal. The oil inlet 1.3 is arranged on the main valve seat 1.2. The oil outlet 1.4 is arranged on the main valve body 1.1. A main valve throttle hole 1.7 connecting the oil inlet 1.3 and the overflow valve chamber 1.5 is arranged on the main valve core 1.6. The main valve spring 1.8 is located in the relief valve chamber 1.5, and the main valve core 1.6 is pressed against the main valve seat 1.2 under the action of the main valve spring 1.8, so that the main valve core 1.6 is sealed and connected to the main valve seat 1.2; at this time, the relief valve 1 is in a closed state, and the oil inlet 1.3 is not connected to the oil outlet 1.4.

[0033] The high-speed switch valve 2 includes a switch valve body 2.1, a switch valve seat 2.2 and an electromagnetic control assembly. The switch valve body 2.1 is arranged on the main valve body 1.1. A pilot valve chamber 2.3 is arranged in the switch valve body 2.1. The pilot valve chamber 2.3 is connected to the overflow valve chamber 1.5. The switch valve seat 2.2 is arranged in the switch valve body 2.1. A controllable throttle hole 2.4 is arranged on the switch valve seat 2.2. A long-pass damping hole 3 is arranged on the switch valve seat 2.2 or the switch valve body 2.1. One end of the controllable throttle hole 2.4 is connected to the pilot valve chamber 2.3, and the other end of the controllable throttle hole 2.4 is connected to the oil discharge port 1.4 through the oil channel. One end of the long-pass damping hole 3 is connected to the pilot valve chamber 2.3, and the other end of the long-pass damping hole 3 is also connected to the oil discharge port 1.4 through the oil channel. The controllable throttle hole 2.4 and the long-pass damping hole 3 are arranged in parallel.

[0034] The electromagnetic control component includes a control valve stem 2.5 that controls the flow area of ​​the controllable throttle hole 2.4. In this embodiment, the control valve stem 2.5 is coaxially distributed with the controllable throttle hole 2.4. The electromagnetic control component controls the movement of the control valve stem 2.5 by the magnitude of a given current to continuously change the flow area of ​​the controllable throttle hole 2.4. The coil and other structures of the electromagnetic control component are not shown in the figure. The specific method and structure of the electromagnetic control component are prior art, and its specific structure is not the invention point of this application, so this application does not elaborate on the specific method and structure of the electromagnetic control component and other conventional technical means.

[0035] In this embodiment, the electromagnetic control component also includes a valve stem reset spring 2.6. When the electromagnetic control component is powered off, the valve stem reset spring 2.6 drives the control valve stem 2.5 to reset so that the flow area of ​​the controllable throttle hole 2.4 reaches the maximum. When the electromagnetic control component is powered on, the control valve stem 2.5 moves toward the controllable throttle hole 2.4 to reduce the flow area of ​​the controllable throttle hole 2.4; and as the current passed into the electromagnetic control component increases, the flow area of ​​the controllable throttle hole 2.4 gradually decreases until it is closed. In this way, when the electromagnetic control component loses power, the flow area of ​​the controllable throttle hole 2.4 reaches the maximum, the pressure in the pilot valve chamber 2.3 is low, and the corresponding pressure in the overflow valve chamber 1.5 connected thereto is also low, providing a smaller shock absorption damping, which is a small damping safety protection provided by the valve to the vehicle shock absorption system when the power is off or the control line fails.

[0036] The continuously adjustable damping regulating valve of this embodiment adopts a high-speed switch valve 2 to replace the proportional solenoid valve, and a long-through damping hole 3 is arranged on the switch valve seat 2.2 or the switch valve body 2.1, and the long-through damping hole 3 is arranged in parallel with the controllable throttle hole 2.4; in this way, not only can the continuous adjustment of different damping of the shock absorber be achieved, but also the manufacturing cost, structural size and body space can be effectively reduced. Specifically, The electromagnetic control component is energized, and the flow area of ​​the controllable throttle hole 2.4 is controlled by controlling the movement of the valve stem 2.5, so that the flow area of ​​the controllable throttle hole 2.4 is continuously changed by controlling the size of the given current, and then the change of the pressure in the pilot valve chamber 2.3 is controlled (the pilot valve chamber 2.3 is connected to the overflow valve chamber 1.5, and the change of the pressure in the overflow valve chamber 1.5 corresponds to the change of the pressure in the pilot valve chamber 2.3), so as to control the opening of the main valve core 1.6 of the overflow valve 1, and adjust the damping size of the shock absorber by the amount of overflow oil, so as to achieve the adjustment of different damping. Figure 5 As shown in the figure, the currents of I1, I2, and I3 increase in sequence, the flow area of ​​the corresponding controllable throttle hole 2.4 decreases in sequence, the pressure of the overflow valve chamber 1 and the pilot valve chamber 2.3 increases in sequence, and the damping of the corresponding shock absorber increases in sequence. Compared with the proportional solenoid valve, the high-speed switch valve 2 has the characteristics of small structure size and low manufacturing cost, so it can effectively reduce the manufacturing cost, reduce the structure size, and reduce the space of the vehicle body.

[0037] On the other hand, the continuously adjustable damping regulating valve of this embodiment adopts a high-speed switch valve 2 to replace the proportional solenoid valve, and at the same time, a long-pass damping hole 3 is set on the switch valve seat 2.2 or the switch valve body 2.1, and the long-pass damping hole 3 is arranged in parallel with the controllable throttle hole 2.4; it can be obtained that under low Q conditions, it can effectively increase the P lifting rate, thereby increasing the damping force of the shock absorber under low Q conditions and improving the maneuverability, while maintaining moderate comfort requirements to adapt to flat road conditions, the body bounce itself is relatively small, and a new balance between maneuverability and comfort under low Q conditions is achieved. Specifically, See also Figure 4 The PQ characteristic curve diagram shown in the figure (P is the pressure of the shock absorber, Q is the flow rate of the shock absorber), in which curve I is the PQ characteristic curve of the shock absorber using the continuously adjustable damping regulating valve of this embodiment (this curve is the PQ characteristic curve of a given current); curve II is the PQ characteristic curve of the shock absorber using the proportional solenoid valve as the pilot valve in the prior art (this curve is the PQ characteristic curve of a given current); curve III is the PQ characteristic curve of the shock absorber directly using the high-speed switching valve 2 (without the long-through damping hole 3) (this curve is the PQ characteristic curve of a given current); and the given currents in curves I, II and III are consistent. Figure 4 The PQ characteristic curve shown in the figure shows that, compared with the shock absorber using a proportional solenoid valve as a pilot valve in the prior art, the shock absorber using the continuously adjustable damping regulating valve of this embodiment can effectively increase the P rise and fall rate under low Q conditions, thereby increasing the damping force of the shock absorber under low Q conditions and improving the maneuverability; Compared with the shock absorber directly using the high-speed switch valve 2 (without the long-pass damping hole 3), the shock absorber using the continuously adjustable damping regulating valve of this embodiment has a slower rise and fall rate of P under low Q conditions, and can maintain a moderate comfort requirement; Therefore, the shock absorber with the continuously adjustable damping regulating valve of the present embodiment can effectively increase the rising and falling rate of P under low Q conditions, thereby increasing the damping force of the shock absorber under low Q conditions and improving maneuverability; at the same time, it can also maintain moderate comfort requirements to adapt to flat road conditions, with relatively small body bounce itself, achieving a new balance between maneuverability and comfort under low Q conditions.

[0038] In addition, during the actual processing and manufacturing of the continuously adjustable damping control valve, the cross-sectional size of the long-through damping hole 3 can also be adjusted to adjust the overall output characteristics of the continuously adjustable damping control valve to match the requirements of different vehicle models.

[0039] Specifically, Figure 1 As shown, one end of the main valve body 1.1 is provided with a switch valve body mounting hole. The switch valve body 2.1 is arranged in the switch valve body mounting hole, and the switch valve body 2.1 and the switch valve body mounting hole are interference fit to achieve a sealed connection between the switch valve body 2.1 and the switch valve body mounting hole. The part of the switch valve body 2.1 is accommodated in the main valve body 1.1, thereby further reducing the volume of the continuously adjustable damping regulating valve and reducing the space it occupies. Of course, it needs to be said that the purpose is that the switch valve body 2.1 and the switch valve body mounting hole can also be gap-fitted, and the switch valve body 2.1 and the switch valve body mounting hole are sealed and connected by a sealing ring.

[0040] A switch valve seat mounting hole is provided on one end of the switch valve body 2.1 facing the bottom surface of the switch valve body mounting hole. A reaming hole is provided on one end of the switch valve seat mounting hole facing the bottom surface of the switch valve body mounting hole. The reaming hole constitutes the pilot valve chamber 2.3. A connecting oil hole 1.9 connecting the pilot valve chamber 2.3 and the overflow valve chamber 1.5 is provided in the main valve body 1.1. The switch valve seat 2.2 is arranged in the switch valve seat mounting hole, and the switch valve seat 2.2 and the switch valve seat mounting hole are interference fit, so that the switch valve seat 2.2 and the switch valve seat mounting hole are sealed. There is a gap between one end of the switch valve seat 2.2 facing the pilot valve chamber 2.3 and the bottom surface of the switch valve body mounting hole. There is also a gap between the switch valve seat 2.2 and the end facing away from the pilot valve chamber 2.3 and the end of the switch valve seat mounting hole, and the gap constitutes the valve stem insertion hole 2.7. The end of the control valve stem 2.5 extends into the valve stem insertion hole 2.7 and faces the controllable throttling hole 2.4. An annular groove 2.9 is provided on the outer side of the switch valve body 2.1, and an inner oil hole 2.8 is provided in the switch valve body 2.1, which is connected to the annular groove 2.9 and the valve stem insertion hole 2.7. An outer oil hole 1.10 connected to the annular groove 2.9 is provided on the outer side wall of the main valve body 1.1. The valve stem insertion hole 2.7, the inner oil hole 2.8, the annular groove 2.9 and the outer oil hole 1.10 constitute a part of the oil passage. The other end of the controllable throttle hole 2.4 is connected to the valve stem insertion hole 2.7, and the other end of the long-pass damping hole 3 is connected to the valve stem insertion hole 2.7. In this way, it is convenient to process and manufacture the pilot valve cavity 2.3, so that one end of the controllable throttle hole 2.4 on the switch valve seat 2.2 and one end of the long-pass damping hole 3 can be directly connected to the pilot valve cavity 2.3, and the other end of the controllable throttle hole 2.4 and the other end of the long-pass damping hole 3 can be connected to the oil passage, which is convenient for the actual processing and manufacturing of the continuously adjustable damping regulating valve.

[0041] Further, such as Figure 1 As shown, one end of the controllable throttling hole 2.4 facing the control valve stem 2.5 is provided with a conical control port, and one end of the control valve stem 2.5 facing the controllable throttling hole 2.4 is provided with a hemispherical protrusion or a conical protrusion matching with the conical control port.

[0042] Further, such as Figure 1As shown, the switch valve body 2.1 is arranged at one end of the main valve body 1.1, and the main valve seat 1.2 is arranged at the other end of the main valve body 1.1. In this way, the arrangement of the switch valve body 2.1 and the main valve seat 1.2 is optimized, which is conducive to improving the structural compactness of the continuously adjustable damping regulating valve and reducing the space it occupies. Specifically, the other end of the main valve seat 1.2 is provided with a main valve seat 1.2 mounting hole connected to the overflow valve chamber 1.5, and the main valve seat 1.2 is arranged in the main valve seat 1.2 mounting hole, and the main valve seat 1.2 and the main valve seat 1.2 mounting hole have an interference fit, so that the main valve seat 1.2 and the main valve seat 1.2 mounting hole are sealed and connected. Of course, it needs to be said that the purpose is that the main valve seat 1.2 and the main valve seat 1.2 mounting hole can also be gap-fitted, and the main valve seat 1.2 and the main valve seat 1.2 mounting hole are sealed and connected by a sealing ring.

[0043] Specific embodiment 3: The rest of the structure of this embodiment refers to specific embodiment 1 or specific embodiment 2, and the difference is that: In one embodiment, Figure 1 As shown, a long through groove is provided on the inner wall of the switch valve seat mounting hole, and the long through groove runs through both ends of the switch valve seat mounting hole. The long through groove constitutes the long through damping hole 3. In this way, the long through damping hole 3 is arranged on the inner wall of the switch valve seat mounting hole (that is, the long through damping hole 3 is arranged on the switch valve body 2.1), which is convenient for the actual processing and manufacturing of the long through damping hole 3.

[0044] In another embodiment, if Figure 2 As shown, a long through groove is provided on the outer wall of the switch valve seat 2.2, and the long through groove runs through both ends of the switch valve seat 2.2, and the long through groove constitutes the long through damping hole 3. In this way, the long through damping hole 3 is arranged on the outer wall of the switch valve seat 2.2, which is convenient for the actual processing and manufacturing of the long through damping hole 3.

[0045] In a third embodiment, if Figure 3 As shown, a long through hole is provided in the switch valve seat 2.2, and the long through hole runs through both ends of the switch valve seat 2.2. The long through hole constitutes the long through damping hole 3. In this way, the long through damping hole 3 is arranged in the switch valve seat 2.2, which is convenient for the actual processing and manufacturing of the long through damping hole 3.

[0046] In the fourth embodiment, a long through hole (not shown in the figure) is provided in the switch valve body 2.1, and both ends of the long through hole are open, and the long through hole constitutes the long through damping hole 3. In this embodiment, the long through damping hole 3 is arranged on the switch valve body 2.1, which is convenient for the actual processing and manufacturing of the long through damping hole 3.

[0047] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent transformation made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A continuously adjustable damping control valve, characterized in that: It includes a high-speed switch valve and a relief valve, wherein the relief valve includes a main valve body, an oil inlet and an oil outlet, and a main valve core and a relief valve cavity are arranged in the main valve body; The high-speed switching valve includes a switching valve body, a switching valve seat and an electromagnetic control component. The switching valve body is arranged on the main valve body. A pilot valve chamber is arranged in the switching valve body. The pilot valve chamber is connected with the overflow valve chamber. A controllable throttling hole is arranged on the switching valve seat. A long-pass damping hole is arranged on the switching valve seat or the switching valve body. One end of the controllable throttling hole and one end of the long-pass damping hole are respectively connected with the pilot valve chamber, and the other end of the controllable throttling hole and the other end of the long-pass damping hole are connected with the oil discharge port through the oil channel; the electromagnetic control component includes a control valve stem for controlling the flow area of ​​the controllable throttling hole.

2. A continuously adjustable damping regulating valve according to claim 1, characterized in that: The electromagnetic control assembly also includes a valve stem reset spring, which drives the control valve stem to reset when the electromagnetic control assembly is powered off, so that the flow area of ​​the controllable throttle hole reaches the maximum; When the electromagnetic control component is energized, the control valve stem moves toward the controllable throttle hole to reduce the flow area of ​​the controllable throttle hole; and as the current passed through the electromagnetic control component increases, the flow area of ​​the controllable throttle hole gradually decreases until it is closed.

3. A continuously adjustable damping regulating valve according to claim 1 or 2, characterized in that: The switch valve body is provided with a switch valve seat mounting hole, the switch valve seat and the switch valve seat mounting hole are interference fit, and the inner wall of the switch valve seat mounting hole is provided with a long through groove, which runs through both ends of the switch valve seat mounting hole and constitutes the long through damping hole.

4. A continuously adjustable damping control valve according to claim 1 or 2, characterized in that: The switch valve body is provided with a switch valve seat mounting hole, the switch valve seat and the switch valve seat mounting hole are interference fit, and the outer wall of the switch valve seat is provided with a long through groove, which runs through both ends of the switch valve seat and constitutes the long through damping hole.

5. A continuously adjustable damping regulating valve according to claim 1 or 2, characterized in that: One end of the main valve body is provided with a switch valve body mounting hole, the switch valve body is arranged in the switch valve body mounting hole, and the switch valve body and the switch valve body mounting hole are interference fit.

6. A continuously adjustable damping regulating valve according to claim 5, characterized in that: A switch valve seat mounting hole is provided on one end of the switch valve body facing the bottom surface of the switch valve body mounting hole, and an expansion hole is provided on the switch valve seat mounting hole at one end facing the bottom surface of the switch valve body mounting hole. The expansion hole constitutes the pilot valve cavity, and the switch valve seat is interference fit with the switch valve seat mounting hole.

7. A continuously adjustable damping control valve according to claim 1 or 2, characterized in that: One end of the controllable throttling hole facing the control valve stem is provided with a conical control port, and one end of the control valve stem facing the controllable throttling hole is provided with a hemispherical protrusion or a conical protrusion matching with the conical control port.

8. A continuously adjustable damping regulating valve according to claim 1 or 2, characterized in that: The relief valve also includes a main valve seat and a main valve spring. The main valve core is slidingly and sealingly connected to the relief valve cavity. The main valve core is pressed against the main valve seat under the action of the main valve spring to seal the main valve core and the main valve seat.

9. A continuously adjustable damping regulating valve according to claim 8, characterized in that: The oil inlet is arranged on the main valve seat, the oil outlet is arranged on the main valve body, and the main valve core is provided with a main valve throttling hole communicating with the oil inlet and the overflow valve cavity.

10. A continuously adjustable damping regulating valve according to claim 1 or 2, characterized in that: The overflow valve also includes a main valve seat. The switch valve body is arranged at one end of the main valve body, and the main valve seat is arranged at the other end of the main valve body.

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