Self-closing valve triggered by flow characteristics

Abstract

The utility model discloses a flow characteristic triggered self-closing valve which comprises a valve body, and oil inlet flow channels are arranged on the two sides of the lower portion of the valve body. The flow adjusting sliding barrel is in sliding fit with the valve body, and a limiting clamp spring matched with the oil inlet runner is arranged on the flow adjusting sliding barrel; the damping part is arranged in the valve body, damping is generated through the damping part by adjusting the flow, and the sliding speed of the flow adjusting sliding barrel is slowed down; and the bottom in the flow adjusting sliding barrel is provided with the grounding buffer seat matched with the valve body. The valve is simple in structure and convenient to implement, an ultra-large oil passing hole can be provided in an initial state, shock absorption starts to run from an under-damping state in each compression stroke, jolt is absorbed to the maximum extent, the damping force linearly rises to a traditional damping preset value along with gradual reduction of a flow channel of the bypass valve, comfort is greatly improved, and the service life of the bypass valve is prolonged. The problem that damping of a traditional shock absorber can only be either comfortable or stable is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to shock absorber technical field, specifically point to a kind of self-closing valve of flow characteristic trigger. BACKGROUND

[0002] The compression damping system of traditional shock absorber is usually composed of throttle hole and valve sheet to form high-low speed oil circuit, to generate single force / speed characteristic curve.This design, when the wheel passes through sharp obstacle or falls to hard plane, shock absorber should be compressed quickly and then gradually slow down, but in traditional structure, the impact moment corresponds to the maximum damping force, cannot quickly absorb high-frequency impact energy, and the jolt is transmitted to spring.In extreme working condition, this characteristic can even cause tire to be forced to compress to cause rebound, so that shock absorber is accelerated suddenly in the middle of stroke.

[0003] Therefore, traditional shock absorber structure can only choose between comfort and stability:

[0004] Want to absorb more high-frequency impact, can only lower overall preset to underdamped state

[0005] Want more control stability, can only bear high-frequency impact

[0006] Previous attempts to break through this bottleneck through electric control damping, stroke progressive damping, but there are still significant limitations:

[0007] Electric control damping is divided into regulating valve type and magnetorheological type, which considers comfort and control by changing overall damping curve in real time, but it is difficult to identify complex and changeable road conditions.

[0008] Stroke progressive damping realizes the effect of small damping in front and large damping in end through mechanical structure, which inevitably loses controllability, and in braking / continuous compression working condition, the structure does not work, and has been almost eliminated

[0009] Therefore, a self-closing valve triggered by flow characteristic is proposed to bring impact initial stage softening effect under arbitrary stroke to solve the existing problems. UTILITY MODEL CONTENT

[0010] The technical problem to be solved by the utility model is to overcome the defects of the above-mentioned technology, and to provide a self-closing valve triggered by flow characteristic.

[0011] To solve the above technical problems, the technical scheme provided by the utility model is a self-closing valve triggered by flow characteristic: comprising

[0012] Valve body, the lower part of the valve body is provided with oil inlet flow channel on both sides;

[0013] Flow regulating slide cylinder, the flow regulating slide cylinder is in sliding fit with the valve body, the flow regulating slide cylinder is provided with limit snap spring matched with the oil inlet flow channel.

[0014] The damping part is arranged in the valve body, and damping is generated by adjusting the flow to slow down the sliding speed of the flow adjusting slide cylinder;

[0015] The bottom of the flow adjusting slide cylinder is provided with a bottom-touching buffer seat matched with the valve body.

[0016] As an improvement, the valve body comprises a main body, a connecting head arranged on the main body, and an oil inlet pipe arranged at the bottom of the main body.

[0017] As an improvement, the number of the oil inlet flow channels is two, and the oil inlet flow channels are symmetrically arranged on both sides of the upper part of the oil inlet pipe, and the oil inlet flow channels are in the form of long strip-shaped hole grooves arranged along the axial direction of the oil inlet pipe.

[0018] As an improvement, the flow adjusting slide cylinder is in a hollow cylindrical structure with an open upper end, and the inner wall of the flow adjusting slide cylinder is matched with the oil inlet pipe.

[0019] As an improvement, the damping part comprises a partition plate, a one-way valve piece, and a spring, the partition plate is fixedly arranged in the oil inlet pipe, the partition plate is coaxially provided with a throttling hole, the partition plate is circumferentially provided with a one-way hole, a positioning snap spring is clamped in the oil inlet pipe, the one-way valve piece is matched with the one-way hole, and the spring is in abutment with the positioning snap spring and the one-way valve piece at both ends.

[0020] As an improvement, the one-way valve piece is in an annular structure.

[0021] As an improvement, the bottom-touching buffer seat is in a hemispherical structure and is matched with the inner diameter of the oil inlet pipe.

[0022] As an improvement, in the initial state, the top end of the flow adjusting slide cylinder is located at the lower part of the oil inlet flow channel, the limiting snap spring is in contact with the bottom end of the oil inlet flow channel, and the bottom-touching buffer seat is in a separated state with the bottom of the oil inlet pipe.

[0023] Compared with the prior art, the utility model has the advantages of:

[0024] 1. Through the cooperation of the valve body structure and the flow adjusting slide cylinder, dynamic self-adaptive adjustment of compression damping is realized, external energy is not needed for driving, and damping force is generated completely by relying on the synergistic effect of oil pressure and oil storage chamber volume change, thereby breaking through the limitation of traditional shock absorbers only having damping force / speed curve characteristics.

[0025] 2. In the low-speed compression working condition of the shock absorber, the oil amount flowing into the designed volume of the valve body is closed, so that the low-speed stability is ensured; in the high-speed compression working condition, the throttling hole limits the movement speed of the flow adjusting slide cylinder, so that the closing is delayed, and the external characteristics are also softened for more strokes. The "low-speed effect short stroke and high-speed softening long stroke" characteristics realize the balance between comfort and stability which is difficult to be considered in traditional technologies.

[0026] 3. The cooperation design of the semi-spherical bottom-touching buffer seat and the one-way valve sheet eliminates the risk of mechanical impact and ensures the softening effect under continuous high-frequency impact through the orifice throttling effect of the throttle hole. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structure diagram of a self-closing valve triggered by flow characteristics of the utility model Figure One .

[0028] Figure 2 is a structure diagram of a self-closing valve triggered by flow characteristics of the utility model Figure Two .

[0029] Figure 3 is an exploded view of a self-closing valve triggered by flow characteristics of the utility model.

[0030] Figure 4 is a structure diagram of a self-closing valve triggered by flow characteristics of the utility model.

[0031] Figure 5 is a top view of a self-closing valve triggered by flow characteristics of the utility model.

[0032] Figure 6 is Figure 5 a sectional view at A-A in the figure.

[0033] Figure 7 is a side view of a self-closing valve triggered by flow characteristics of the utility model.

[0034] Figure 8 is Figure 7 a sectional view at B-B in the figure.

[0035] As shown in the figure:

[0036] 1. Valve body, 11. Main body, 12. Connector, 13. Oil inlet pipe,

[0037] 2. Oil inlet flow channel, 3. Flow regulating slide cylinder, 4. Limiting snap spring,

[0038] 5. Damping part, 51. Partition plate, 52. One-way valve sheet, 54. Spring, 55. Throttle hole, 56. One-way hole, 57. Positioning snap spring

[0039] 6. Bottom-touching buffer seat. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the utility model embodiments clearer, the technical scheme in the utility model embodiments will be described clearly and completely below in combination with the drawings in the utility model embodiments. Obviously, the described embodiments are part of the utility model embodiments, rather than all the embodiments. The components of the utility model embodiments described and shown in the drawings herein can be arranged and designed in various different configurations.

[0041] In the description of the utility model embodiments, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, which is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0042] In addition, if the terms "horizontal", "vertical", "overhanging" and the like appear, they do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0043] In the description of the utility model embodiments, "a plurality of" represents at least 2.

[0044] In the description of the utility model embodiments, it should also be noted that unless otherwise explicitly specified and limited, if the terms "arrangement", "installation", "connection", "connection" appear, they should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0045] In combination with the drawings, a flow characteristic triggered self-closing valve is connected in parallel to the traditional high-low speed compression oil circuit, comprising a valve body 1, the lower part of the valve body 1 is provided with an oil inlet flow channel 2 on both sides;

[0046] Specifically, the valve body 1 includes a main body 11, a connecting head 12 arranged on the main body 11, and an oil inlet pipe 13 arranged at the bottom of the main body 11. The main body 11, the connecting head 12, and the oil inlet pipe 13 are coaxially arranged to ensure the smoothness of the oil flow. In this embodiment, the connecting head 12 is threadedly connected with an IFP piston rod in a single cylinder shock absorber.

[0047] The number of the oil inlet flow channels 2 is two, and the oil inlet flow channels 2 are symmetrically arranged on both sides of the upper part of the oil inlet pipe 13. The oil inlet flow channels 2 are in the form of long slot structures arranged along the axis direction of the oil inlet pipe 13. The oil inlet flow channels 2 are symmetrically arranged on both sides of the oil inlet pipe 13 in the valve body 1, which not only ensures the oil flow efficiency but also provides a sliding space for the flow regulating sliding cylinder 3.

[0048] In the specific implementation, during the damping process, the oil flows out through the valve body 1 via the oil inlet flow channels 2. After the damping action is completed, the oil flows back through the valve body 1 and the oil inlet flow channels 2. The long slot structure of the oil inlet flow channels 2 is fully open in the initial state, which can realize large flow and rapid delivery. With the progress of the damping action, the long slot structure is gradually closed, forming the compression characteristics of “low speed and short stroke, high speed and long stroke”.

[0049] The flow regulating sliding cylinder 3 is arranged in the suspension state in the damping oil in the specific arrangement. The flow regulating sliding cylinder 3 is in sliding cooperation with the valve body 1. The flow regulating sliding cylinder 3 is provided with a limiting snap spring 4 cooperating with the oil inlet flow channel 2.

[0050] The flow regulating sliding cylinder 3 is in the form of a hollow cylinder with an open upper end. The inner wall of the flow regulating sliding cylinder 3 is adapted to the oil inlet pipe 13. The adjustment of the size of the oil inlet flow channel 2 can be realized through the mutual movement between the flow regulating sliding cylinder 3 and the oil inlet pipe 13.

[0051] In the initial state, the top end of the flow regulating sliding cylinder 3 is located at the lower part of the oil inlet flow channel 2, and the limiting snap spring 4 is in contact with the bottom end of the oil inlet flow channel 2. The bottom end of the oil inlet pipe 13 is in a separated state from the bottom end of the oil inlet pipe 13. At this time, the oil inlet pipe 13 and the flow regulating sliding cylinder 3 form an independent oil storage chamber. Simultaneously, the oil storage chamber changes with the displacement of the flow regulating sliding cylinder 3. In this way, the change of the oil storage chamber brings damping to the movement of the flow regulating sliding cylinder, thereby achieving the effect of limiting the movement speed.

[0052] Specifically, the effective cross-sectional area of the oil inlet flow channel 2 is changed through the displacement of the flow regulating sliding cylinder 3. Combined with the damping effect caused by the volume change of the oil storage chamber, the precise matching of the flow and displacement is realized.

[0053] At the beginning of the damping action, the damper action pressurizes the oil, which flows out through the oil inlet flow channel 2 via the valve body 1. At this time, under the action of the oil pressure, the flow regulating spool 3 moves along the axis of the oil inlet pipe 13 towards the main body 11. At the initial movement of the flow regulating spool 3, the oil inlet flow channel 2 is in a fully open state, and large-flow oil delivery can be achieved. When the flow regulating spool 3 moves, the oil inlet flow channel 2 will be gradually closed.

[0054] At the same time, since there is an independent oil storage chamber in the flow regulating spool 3, which changes with the displacement of the flow regulating spool 3, the movement of the flow regulating spool is damped, thereby limiting the movement speed and prolonging the closing time of the oil inlet flow channel 2, so as to achieve the effect of short stroke at low speed and long stroke at high speed.

[0055] The damping part 5 is arranged in the valve body 1, and the damping part 5 generates damping to the flow regulating by regulating the flow, so as to slow down the sliding speed of the flow regulating spool 3.

[0056] The damping part 5 includes a partition plate 51, a one-way valve plate 52 and a spring 54. The partition plate 51 is fixedly arranged in the oil inlet pipe 13, the partition plate 51 is coaxially provided with a throttling hole 55, the partition plate 51 is circumferentially provided with a one-way hole 56, the oil inlet pipe 13 is clamped with a positioning snap spring 57, the one-way valve plate 52 cooperates with the one-way hole 56, and the spring 54 is in abutment with the positioning snap spring 57 and the one-way valve plate 52 at both ends.

[0057] The one-way valve plate 52 has a ring structure.

[0058] In the initial state, the one-way valve plate 52 cooperates with the one-way hole 56, and only the throttling hole 55 is in a conductive state. In the damping action state, the oil in the oil storage chamber in the flow regulating spool 3 flows out through the throttling hole 55. The oil storage chamber changes with the displacement of the flow regulating spool 3, and cooperates with the throttling effect of the throttling hole 55 to generate damping force, thereby achieving progressive control of the sliding speed of the spool.

[0059] When resetting, the oil flows back to the flow regulating spool through the connecting head 12 and the main body 11. Since the pressure of the oil backflow is greater than the pressure of the spring, the one-way valve plate 52 is separated from the partition plate 51 at this time. At this time, the one-way hole 56 is in a conductive state, and a large amount of oil backflow to the oil storage chamber can be achieved, so as to drive the resetting of the flow regulating spool 3, and thereby achieve the opening of the oil inlet flow channel 2.

[0060] The bottom of the flow regulating spool 3 is provided with a bottom cushion seat 6 which cooperates with the valve body 1.

[0061] The bottom-touching buffer seat 6 is a hemispherical structure and is matched with the inner diameter of the oil inlet pipe 13.

[0062] In the implementation, the flow regulating slide 3 is moved to close the oil inlet flow channel 2, and in the process of moving the flow regulating slide 3, the oil inlet pipe 13 is gradually moved towards the bottom of the flow regulating slide 3, and when the bottom end of the oil inlet pipe 13 gradually approaches the bottom-touching buffer seat 6, because the bottom-touching buffer seat 6 is a hemispherical structure, the flow space between the oil inlet pipe 13 and the bottom-touching buffer seat 6 is gradually reduced, so that the bottom-touching buffer effect is achieved, and the impact caused by the contact between the oil inlet pipe 13 and the flow regulating slide 3 is avoided.

[0063] In the embodiment, the main body 1 still retains the conventional low-speed compression oil passage fixed hole arranged in the circumference of the conventional valve body, and when the flow regulating slide 3 closes the oil inlet flow channel 2, the remaining oil flows through the compression oil passage fixed hole.

[0064] The above describes the utility model and its implementation, which is not limited, and the drawings only show one of the embodiments of the utility model, and the actual structure is not limited. In summary, if the ordinary skilled in the art is inspired, without departing from the creative purpose of the utility model, without creative design, the similar structure and the embodiment of the technical scheme should belong to the protection scope of the utility model.

Claims

1. A flow characteristic triggered self-closing valve, characterized by: Comprising A valve body (1) is provided with oil inlet flow channels (2) on both sides of the lower part; A flow regulating slide cylinder (3) is in sliding fit with the valve body (1), and is provided with a limiting snap spring (4) matched with the oil inlet flow channel (2); A damping part (5) is arranged in the valve body (1), which generates damping to the flow regulation and slows down the sliding speed of the flow regulating slide cylinder (3); A bottom touch buffer seat (6) is arranged at the bottom of the flow regulating slide cylinder (3) and matched with the valve body (1).

2. A flow characteristic triggered self-closing valve according to claim 1, characterized in that: The valve body (1) comprises a main body (11), a connecting head (12) arranged on the main body (11), and an oil inlet pipe (13) arranged at the bottom of the main body (11).

3. A flow characteristic triggered self-closing valve according to claim 2, characterized in that: The number of oil inlet flow channels (2) is two, which are symmetrically arranged on both sides of the upper part of the oil inlet pipe (13), and the oil inlet flow channels (2) are in the form of long strip hole and groove structure arranged along the axis direction of the oil inlet pipe (13).

4. A flow characteristic triggered self-closing valve according to claim 3, characterized in that: The flow regulating slide cylinder (3) is a hollow cylindrical structure with an open upper end, and the inner wall of the flow regulating slide cylinder (3) is matched with the oil inlet pipe (13).

5. A flow characteristic triggered self-closing valve according to claim 2, characterized in that: The damping part (5) comprises a partition plate (51), a one-way valve plate (52) and a spring (54), the partition plate (51) is fixedly arranged in the oil inlet pipe (13), the partition plate (51) is coaxially provided with a throttling hole (55), the partition plate (51) is circumferentially provided with a one-way hole (56), the oil inlet pipe (13) is clamped with a positioning snap spring (57), the one-way valve plate (52) is matched with the one-way hole (56), and the spring (54) is respectively abutted with the positioning snap spring (57) and the one-way valve plate (52) at both ends.

6. A flow characteristic triggered self-closing valve according to claim 5, characterized in that: The one-way valve plate (52) is in the form of a ring structure.

7. A flow characteristic triggered self-closing valve according to claim 1, characterized in that: The bottom touch buffer seat (6) is in the form of a hemispherical structure and is matched with the inner diameter of the oil inlet pipe (13).

8. The flow characteristic triggered self-closing valve according to any one of claims 1 to 7, characterized in that: In the initial state, the top end of the flow regulating slide cylinder (3) is located at the lower part of the oil inlet flow channel (2), the limiting snap spring (4) is in contact with the bottom end of the oil inlet flow channel (2), and the bottom touch buffer seat (6) is separated from the bottom of the oil inlet pipe (13).

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