Valve body structure, electromagnetic damping valve and shock absorber

Abstract

The utility model provides a valve body structure, an electromagnetic damping valve and a shock absorber, relates to the technical field of vehicle shock absorption, and aims to optimize the valve body structure to a certain extent and reduce the machining difficulty of structural parts. The utility model provides a valve body structure which comprises a pilot valve assembly and a pushing assembly. The pilot valve assembly comprises a lower ball seat, a steel ball seat, a first elastic piece and a plugging piece, the lower ball seat and the steel ball seat are oppositely arranged, a first oil cavity and a first oil way are formed in the lower ball seat, the first elastic piece is arranged in the first oil cavity, a second oil way is formed in the steel ball seat, and the diameter of the second oil way is larger than that of the plugging piece. An oil passing gap is formed between the plugging piece and the second oil way; the pushing assembly can stretch into or retreat from the second oil way to push the plugging piece to move in the direction close to or away from the lower ball seat so as to change the opening degree of the first oil way.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle shock absorption, in particular to a valve body structure, an electromagnetic damping valve and a shock absorber. Background Art

[0002] Shock absorbers can play a buffering role for the bumps generated when a vehicle passes through potholes and are widely used. In order to simultaneously meet the driving stability and operating stability of the vehicle, the existing shock absorbers need good adjustable ability. Therefore, the pilot overflow valve structure is widely used in the damping shock absorber structure to adjust the damping size of the shock absorber by controlling the opening of the main spool, so that the shock absorber can better adapt to different requirements during vehicle driving.

[0003] However, the existing electromagnetic damping valves for shock absorbers contain many and complex structures. Taking the two ball seats in the valve body as an example, since it is necessary to allow the oil to flow, oil cavities, oil paths and oil holes need to be opened on the ball seats to realize the normal flow and drainage of the oil. This increases the processing difficulty of the ball seats and affects the processing efficiency of the overall device.

[0004] Therefore, there is an urgent need to provide a valve body structure, an electromagnetic damping valve and a shock absorber to solve the problems existing in the prior art to a certain extent. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a valve body structure, an electromagnetic damping valve and a shock absorber to optimize the valve body structure to a certain extent and reduce the processing difficulty of structural parts.

[0006] A valve body structure provided by the utility model includes a pilot valve assembly and a pushing assembly; the pilot valve assembly includes a lower ball seat, a steel ball seat, a first elastic member and a plugging member. The lower ball seat and the steel ball seat are oppositely arranged, and the lower ball seat is formed with a first oil cavity and a first oil path. The first elastic member is arranged in the first oil cavity. The steel ball seat is formed with a second oil path, and the diameter of the second oil path is larger than the diameter of the plugging member, so that an oil passing gap is formed between the plugging member and the second oil path. The pushing assembly can extend into or withdraw from the second oil path to push the plugging member to move in a direction close to or away from the lower ball seat, so as to change the opening of the first oil path.

[0007] Among them, the valve body structure provided by the present utility model further includes a main valve assembly, and the main valve assembly includes a valve port, a valve sleeve, a main valve core, and a second elastic member; the valve port is connected to the valve sleeve to form a receiving cavity, the main valve core is disposed in the receiving cavity, one end of the second elastic member abuts against the main valve core, and the other end abuts against the lower ball seat; a second oil cavity is formed between the main valve core and the valve port, a third oil cavity is formed in the main valve core, an oil outlet is formed on the valve sleeve, the second oil cavity and the third oil cavity can communicate with the oil outlet, and the first oil cavity can communicate with the third oil cavity; an oil inlet is formed in the valve port, and a third oil passage communicating the oil inlet and the third oil cavity is formed in the main valve core.

[0008] Specifically, the lower ball seat is formed with a communicating oil passage, and the communicating oil passage connects the first oil cavity and the third oil cavity.

[0009] Specifically, the valve body structure provided by the present utility model further includes a housing, the steel ball seat is disposed in the housing, the valve sleeve is embedded in the housing, the lower ball seat is connected to the valve sleeve, and a fourth oil passage is formed between the valve sleeve and the housing; a fourth oil cavity is formed in the housing, and the fourth oil cavity communicates with the oil passing gap and the fourth oil passage.

[0010] Furthermore, the pushing assembly includes a moving iron core, a static iron core, and a push rod. One end of the push rod is connected to the moving iron core, and the other end passes through the static iron core and contacts the blocking member; both the moving iron core and the static iron core are disposed in the housing.

[0011] Even further, the static iron core is formed with a through hole, the push rod is in clearance fit with the through hole, and the fourth oil cavity communicates with the oil passing gap through the clearance between the push rod and the through hole.

[0012] Even further, the pushing assembly further includes a coil, the coil is embedded in the housing and is disposed corresponding to the moving iron core, and when the coil is energized, it can drive the moving iron core to slide in the housing.

[0013] Among them, the blocking member is spherical, and a guiding portion is formed at the position of the lower ball seat corresponding to the blocking member. The guiding portion is in a funnel-shaped structure, and the maximum diameter of the guiding portion is smaller than the diameter of the blocking member.

[0014] Compared with the prior art, the valve body structure provided by the present utility model has the following advantages:

[0015] The valve body structure provided by the present utility model includes a pilot valve assembly and a pushing assembly; the pilot valve assembly includes a lower ball seat, a steel ball seat, a first elastic member, and a plugging member. The lower ball seat and the steel ball seat are arranged opposite to each other, and the lower ball seat is formed with a first oil chamber and a first oil passage. The first elastic member is arranged in the first oil chamber. The steel ball seat is formed with a second oil passage, and the diameter of the second oil passage is larger than the diameter of the plugging member, so that an oil passing gap is formed between the plugging member and the second oil passage. The pushing assembly can extend into or withdraw from the second oil passage to push the plugging member to move closer to or away from the lower ball seat, so as to change the opening degree of the first oil passage.

[0016] It can be analyzed from this that the first oil chamber formed by the lower ball seat can provide space for the installation of the first elastic member. The steel ball seat in this application is formed with a second oil passage, and the diameter of the second oil passage is larger than the diameter of the plugging member, so that an oil passing gap can be formed between the plugging member and the steel ball seat. Through the oil passing gap, oil can pass through when the plugging member blocks the second oil passage, thereby realizing the purpose of oil discharge and ensuring the stability of the operation of the overall device.

[0017] Correspondingly, since only one second oil passage is formed in the steel ball seat in this application, and both the passing of oil and the discharge of oil can be realized through the second oil passage. Therefore, only by machining a hole penetrating the thickness direction of the steel ball seat on the steel ball seat can the two functions and requirements be realized, greatly reducing the processing difficulty, and thus being able to relieve the processing pressure of the complex valve body structure to a certain extent.

[0018] It can be understood that since the valve body structure provided by this application further includes a pushing assembly, and the pushing assembly can extend into or push out of the second oil passage, it can realize moving the plugging member closer to or away from the lower ball seat, and changing the opening degree of the first oil passage, and further realizing the passing amount of oil, so as to achieve the ultimate purpose of changing the damping magnitude of the electromagnetic damping valve.

[0019] In addition, the present utility model also provides an electromagnetic damping valve, including the above-mentioned valve body structure.

[0020] For the electromagnetic damping valve adopting the valve body structure provided by this application, since the structure of the steel ball seat in the valve body structure is simpler, the processing difficulty is lower, and thus the overall processing rate of the overall electromagnetic damping valve can be improved to a certain extent.

[0021] Correspondingly, this application also provides a shock absorber, including the above-mentioned electromagnetic damping valve. Brief Description of the Drawings

[0022] To more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the valve body structure provided by the embodiment of the present utility model.

[0024] In the figure: 1-valve port; 101-inlet oil port; 2-lower ball seat; 201-first oil chamber; 202-first oil passage; 203-connecting oil passage; 204-guiding part; 3-valve sleeve; 301-outlet oil port; 4-housing; 401-fourth oil chamber; 402-fourth oil passage; 5-steel ball seat; 501-second oil passage; 6-coil; 7-sealing member; 8-main spool valve; 801-second oil chamber; 802-third oil chamber; 803-third oil passage; 9-first elastic member; 10-second elastic member; 11-static iron core; 12-push rod; 13-moving iron core. Specific Embodiments

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Usually, the components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application that is required to be protected, but only represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0026] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0027] In addition, terms such as "horizontal" and "vertical" do not require that the components be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0028] In the description of the embodiments of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0029] As used herein, the term "and / or" includes any one of the listed related items and any combination of any two or more of them.

[0030] For ease of description, spatial relationship terms such as "above...", "upper", "below...", and "lower" can be used here to describe the relationship between one element and another as shown in the drawings. Such spatial relationship terms are intended to include different orientations of the device during use or operation in addition to the orientation depicted in the drawings.

[0031] The terms used herein are only for describing various examples and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. The terms "comprises", "comprising", and "having" enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof that exist, but do not preclude the existence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0032] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings, but include changes in shape that occur during manufacturing.

[0033] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application. Additionally, the technical solutions between the various embodiments can be combined with each other, but it must be based on what can be achieved by those of ordinary skill in the art. When the combination of technical solutions results in contradictions or cannot be achieved, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0034] As shown Figure 1 in the figure, the present utility model provides a valve body structure, which includes a pilot valve assembly and a pushing assembly; the pilot valve assembly includes a lower ball seat 2, a steel ball seat 5, a first elastic member 9 and a plugging member 7. The lower ball seat 2 and the steel ball seat 5 are oppositely arranged, and the lower ball seat 2 is formed with a first oil cavity 201 and a first oil passage 202. The first elastic member 9 is arranged in the first oil cavity 201. The steel ball seat 5 is formed with a second oil passage 501, and the diameter of the second oil passage 501 is larger than the diameter of the plugging member 7, so that an oil passing gap is formed between the plugging member 7 and the second oil passage 501. The pushing assembly can extend into or withdraw from the second oil passage 501 to push the plugging member 7 to move in a direction approaching or departing from the lower ball seat 2, so as to change the opening degree of the first oil passage 202.

[0035] Compared with the prior art, the valve body structure provided by the present utility model has the following advantages:

[0036] For the valve body structure provided by the present utility model, the first oil cavity 201 formed by the lower ball seat 2 can provide a space for the installation of the first elastic member 9. The steel ball seat 5 in the present application is formed with a second oil passage 501, and the diameter of the second oil passage 501 is larger than the diameter of the plugging member 7, so that an oil passing gap can be formed between the plugging member 7 and the steel ball seat 5. Through the oil passing gap, oil can pass through when the plugging member 7 plugs the second oil passage 501, thereby realizing the purpose of oil discharge and ensuring the stability of the operation of the overall device.

[0037] Correspondingly, since only one second oil passage 501 is formed in the steel ball seat 5 in the present application, and both the passing of oil and the discharge of oil can be realized through the second oil passage 501, only one hole penetrating the thickness direction of the steel ball seat 5 needs to be processed on the steel ball seat 5 to realize the two functions and requirements, which greatly reduces the processing difficulty, and thus can relieve the processing pressure of the complex valve body structure to a certain extent.

[0038] It can be understood that since the valve body structure provided by the present application further includes a pushing assembly, and the pushing assembly can extend into or push out of the second oil passage 501, the plugging member 7 can be moved in a direction approaching or departing from the lower ball seat 2, and the opening degree of the first oil passage 202 can be changed, thereby realizing the passing amount of oil and achieving the purpose of finally changing the damping magnitude of the electromagnetic damping valve.

[0039] Optionally, as Figure 1As shown in the figure, the valve body structure provided by the present application further includes a main valve assembly, and the main valve assembly includes a valve port 1, a valve sleeve 3, a main valve core 8 and a second elastic member 10; the valve port 1 is connected to the valve sleeve 3 and forms a receiving cavity, the main valve core 8 is disposed in the receiving cavity, one end of the second elastic member 10 abuts against the main valve core 8, and the other end abuts against the lower ball seat 2; a second oil cavity 801 is formed between the main valve core 8 and the valve port 1, the main valve core 8 forms a third oil cavity 802, an oil outlet 301 is formed on the valve sleeve 3, the second oil cavity 801 and the third oil cavity 802 can communicate with the oil outlet 301, and the first oil cavity 201 can communicate with the third oil cavity 802; the valve port 1 forms an oil inlet 101, and the main valve core 8 forms a third oil passage 803 that communicates the oil inlet 101 and the third oil cavity 802.

[0040] The lower ball seat 2 forms a communicating oil passage 203, and the communicating oil passage 203 connects the first oil cavity 201 and the third oil cavity 802. Further, the pushing assembly includes a moving iron core 13, a stationary iron core 11 and a push rod 12. One end of the push rod 12 is connected to the moving iron core 13, and the other end passes through the stationary iron core 11 and contacts the plugging member 7; both the moving iron core 13 and the stationary iron core 11 are disposed in the housing 4, a fourth oil cavity 401 is formed in the housing 4, the stationary iron core 11 forms a through hole, the push rod 12 is in clearance fit with the through hole, and the fourth oil cavity 401 communicates with the oil passing clearance through the clearance between the push rod 12 and the through hole of the stationary iron core 11.

[0041] Further, the pushing assembly further includes a coil 6. The coil 6 is embedded in the housing 4 and is disposed corresponding to the moving iron core 13. When the coil 6 is energized, it can drive the moving iron core 13 to slide in the housing 4.

[0042] In the non-energized state of the valve body structure provided by the present application, oil enters from the oil inlet 101. Part of the oil enters the second oil cavity 801 from the gap between the valve port 1 and the side of the main valve core 8, and part of the oil enters the third oil cavity 802 through the third oil passage 803, and then passes through the communicating oil passage 203. The first elastic member 9 resets the plugging member 7, and the oil flows into the fourth oil passage 402 through the gap between the push rod 12 and the stationary iron core 11. Since the oil flows into the second oil cavity 801, a pressure difference is formed between the second oil cavity 801 and the third oil cavity 802. When the oil flows out through the fourth oil passage 402, the pressure in the third oil cavity 802 is lower than that in the second oil cavity 801. Therefore, the main valve core 8 moves to the left, and the oil in the second oil cavity 801 flows out from the oil outlet 301.

[0043] When powered on, the coil 6 is energized, the moving iron core 13 drives the push rod 12 to move to the right, the push rod 12 pushes the plugging member 7, and then the plugging member 7 seals with the sealing surface of the upper ball seat. Oil enters from the oil inlet 101. Part of the oil enters the second oil chamber 801 from the gap between the valve port 1 and the side of the main valve core 8, and part of it enters the third oil chamber 802 through the third oil passage 803, and then passes through the communication oil passage 203. The first elastic member 9 resets the plugging member 7, and the oil flows into the fourth oil passage 402 through the gap between the push rod 12 and the static iron core 11. Since the oil flows into the second oil chamber 801, a pressure difference is formed between the second oil chamber 801 and the third oil chamber 802. When the oil flows out through the fourth oil passage 402, the pressure in the third oil chamber 802 is lower than that in the second oil chamber 801, so the main valve core 8 moves to the left and the oil flows out from the oil outlet 301.

[0044] When different currents are applied, the gap between the plugging member 7 and the guiding portion 204 of the lower ball seat 2 changes with the magnitude of the electromagnetic force, so that the pressure at the oil inlet 101 changes with the magnitude of the electromagnetic force, thereby achieving the purpose of damping adjustment.

[0045] Preferably, the plugging member 7 in the present application is spherical, and a guiding portion 204 is formed at the position of the lower ball seat 2 corresponding to the plugging member 7. The guiding portion 204 has a funnel-shaped structure, and the maximum diameter of the guiding portion 204 is smaller than the diameter of the plugging member 7.

[0046] Optionally, as Figure 1 shown, the valve body structure provided by the present utility model further includes a housing 4. The steel ball seat 5 is disposed inside the housing 4, the valve sleeve 3 is embedded in the housing 4, the lower ball seat 2 is connected to the valve sleeve 3, and a fourth oil passage 402 is formed between the valve sleeve 3 and the housing 4; a fourth oil chamber 401 is formed inside the housing 4, and the fourth oil chamber 401 is communicated with the oil passing gap and the fourth oil passage 402.

[0047] By connecting the steel ball seat 5 with the housing 4 in the present application, the assembly difficulty between the lower ball seat 2 and the valve sleeve 3 can be reduced.

[0048] In addition, the present utility model further provides an electromagnetic damping valve, including the above-mentioned valve body structure.

[0049] For the electromagnetic damping valve adopting the valve body structure provided by the present application, since the structure of the steel ball seat 5 in the valve body structure is simpler, the processing difficulty is lower, and thus the overall processing rate of the overall electromagnetic damping valve can be improved to a certain extent.

[0050] Correspondingly, the present application further provides a shock absorber, including the above-mentioned electromagnetic damping valve.

[0051] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A valve body structure, characterized in that, It includes a pilot valve assembly and a pushing assembly; The pilot valve assembly includes a lower ball seat, a steel ball seat, a first elastic member and a plugging member. The lower ball seat and the steel ball seat are oppositely arranged, and the lower ball seat forms a first oil chamber and a first oil passage. The first elastic member is arranged in the first oil chamber. The steel ball seat forms a second oil passage, and the diameter of the second oil passage is larger than that of the plugging member, so that an oil passing gap is formed between the plugging member and the second oil passage; The pushing assembly can extend into or withdraw from the second oil passage to push the plugging member to move in a direction approaching or departing from the lower ball seat, so as to change the opening degree of the first oil passage.

2. The valve body structure according to claim 1, wherein It further includes a main valve assembly, and the main valve assembly includes a valve port, a valve sleeve, a main valve core and a second elastic member; The valve port is connected to the valve sleeve and forms a receiving cavity. The main valve core is arranged in the receiving cavity. One end of the second elastic member abuts against the main valve core, and the other end abuts against the lower ball seat; A second oil chamber is formed between the main valve core and the valve port. The main valve core forms a third oil chamber. An oil outlet is formed on the valve sleeve. The second oil chamber and the third oil chamber can be communicated with the oil outlet, and the first oil chamber can be communicated with the third oil chamber; The valve port forms an oil inlet, and the main valve core forms a third oil passage communicating the oil inlet and the third oil chamber.

3. The valve body structure according to claim 2, characterized in that, The lower ball seat forms a communicating oil passage, and the communicating oil passage communicates the first oil chamber and the third oil chamber.

4. The valve body structure according to claim 2, wherein It further includes a housing. The steel ball seat is arranged in the housing. The valve sleeve is embedded in the housing. The lower ball seat is connected to the valve sleeve, and a fourth oil passage is formed between the valve sleeve and the housing; A fourth oil chamber is formed in the housing, and the fourth oil chamber is communicated with the oil passing gap and the fourth oil passage.

5. The valve body structure according to claim 4, wherein, The pushing assembly includes a moving iron core, a static iron core and a push rod. One end of the push rod is connected to the moving iron core, and the other end passes through the static iron core and contacts the plugging member; Both the moving iron core and the static iron core are arranged in the housing.

6. The valve body structure according to claim 5, characterized in that, The static iron core forms a through hole, and the push rod is in clearance fit with the through hole. The fourth oil chamber is communicated with the oil passing gap through the gap between the push rod and the through hole.

7. The valve body structure according to claim 5, characterized in that, The pushing assembly further includes a coil. The coil is embedded in the housing and is arranged corresponding to the moving iron core. When the coil is energized, it can drive the moving iron core to slide in the housing.

8. The valve body structure according to claim 1, characterized in that, The plugging member is spherical, and a guiding portion is formed at the position of the lower ball seat corresponding to the plugging member. The guiding portion is in a funnel-shaped structure, and the maximum diameter of the guiding portion is smaller than the diameter of the plugging member.

9. An electromagnetic damping valve, characterized in that, It includes the valve body structure according to any one of claims 1-8 above.

10. A shock absorber, characterized in that, It includes the electromagnetic damping valve according to claim 9 above.

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