CN219493066U - Solenoid valve and have its automobile body posture control device and car - Google Patents

Abstract

The utility model discloses an electromagnetic valve, a vehicle body posture control device and an automobile with the electromagnetic valve, wherein the electromagnetic valve comprises: the valve comprises a valve body, a valve cavity and a valve cover, wherein the valve body is internally provided with a first flow passage and a second flow passage; the valve seat is arranged in the valve cavity, a communication channel communicated with the second flow channel is formed in the valve seat, a limiting structure is arranged between the valve body and the valve seat, and the limiting structure is used for limiting the valve seat to move towards a direction away from the second flow channel; the valve core is movably arranged in the valve cavity between the communication position and the separation position, the valve core is separated from the valve seat when being positioned at the communication position so that the first flow channel is communicated with the communication channel, and the valve core is combined with the valve seat when being positioned at the separation position so that the first flow channel is separated from the communication channel. According to the electromagnetic valve, the valve seat can resist the reverse pressure outside the electromagnetic valve, and the valve seat is not easy to move towards the valve core, so that the normal opening and closing of the electromagnetic valve can be ensured.

Description

Solenoid valve and have its automobile body posture control device and car

Technical Field

The utility model relates to the technical field of fluid control, in particular to an electromagnetic valve, a vehicle body posture control device with the electromagnetic valve and an automobile.

Background

Solenoid valves in the related art are generally mounted on a valve carrier, and when the valve carrier is applied to a hydraulic control system assembly of a vehicle's attitude suspension assembly or brake, the solenoid valve can be used to open and close a flow path of the solenoid valve carrier to control the flow of oil in the hydraulic control system assembly of the attitude suspension assembly or brake. However, when the electromagnetic valve works, the reverse pressure outside the electromagnetic valve is large, and the valve seat is easy to move, so that the electromagnetic valve is easy to malfunction and can not be normally opened. In addition, the electromagnetic valve is complex in structure and high in assembly difficulty, so that the production cost of the electromagnetic valve is increased.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a solenoid valve in which a valve seat can withstand a reverse pressure outside the solenoid valve, and the valve seat is not easily moved in a direction of a valve body, thereby ensuring normal opening and closing of the solenoid valve.

A further object of the present utility model is to provide a vehicle body posture control device employing the above electromagnetic valve.

Another object of the present utility model is to provide an automobile employing the above-described vehicle body posture control device.

An electromagnetic valve according to an embodiment of the first aspect of the present utility model includes: a valve body defining a valve cavity therein, the valve body having a first flow passage and a second flow passage thereon; the valve seat is arranged in the valve cavity, a communication channel communicated with the second flow channel is formed in the valve seat, a limiting structure is arranged between the valve body and the valve seat, and the limiting structure is used for limiting the valve seat to move towards a direction away from the second flow channel; the valve core is movably arranged in the valve cavity between a communication position and a separation position, the valve core is separated from the valve seat when being positioned at the communication position so that the first flow channel is communicated with the communication channel, and the valve core is combined with the valve seat when being positioned at the separation position so that the first flow channel is separated from the communication channel.

According to the electromagnetic valve disclosed by the embodiment of the utility model, the limiting structure is arranged between the valve body and the valve seat, the valve seat can resist the reverse pressure outside the electromagnetic valve, the limiting structure can limit the valve seat to move towards the direction far away from the second flow passage, and the valve seat is not easy to move upwards so that the valve core cannot be separated from the valve seat, thereby being beneficial to the normal use of the electromagnetic valve and reducing the damage probability of the electromagnetic valve. In addition, the solenoid valve has fewer parts and simpler structure, is favorable for the assembly of the solenoid valve, and can reduce the production cost of the solenoid valve.

According to some embodiments of the utility model, the limit structure comprises at least one limit protrusion, the limit protrusion is arranged on the inner wall surface of the valve cavity, and a side surface of the limit protrusion, which is far away from the valve core, is provided with a first limit surface; the valve seat is provided with a second limiting surface on one side surface adjacent to the valve core, and the second limiting surface is abutted against the first limiting surface to limit the valve seat to move towards the valve core.

According to some embodiments of the utility model, the limiting structure comprises at least one limiting protrusion, the limiting protrusion is a limiting ring table arranged on the inner wall surface of the valve cavity, an avoidance ring groove is formed in the outer circumferential surface of the valve seat, the limiting ring table is matched with the avoidance ring groove, and the limiting ring table is used for stopping movement of the valve seat in the direction towards the valve core.

According to some embodiments of the utility model, the valve seat comprises: a first valve seat segment opposing the limit projection in a radial direction of the valve body; the second valve seat section is connected to one end, far away from the valve core, of the first valve seat section, a step portion is formed between the second valve seat section and the first valve seat section, and one side surface, facing the first limiting surface, of the step portion is the second limiting surface.

According to some embodiments of the utility model, the communication passage includes a first communication section, a second communication section, and a third communication section that communicate in order in a direction away from the valve element, a cross-sectional area of the first communication section gradually decreasing in the direction away from the valve element, the valve element abutting against an inner wall surface of the first communication section when the valve element is combined with the valve seat.

According to some embodiments of the utility model, the cross-sectional area of the third communication section is larger than the cross-sectional area of the second communication section.

According to some embodiments of the utility model, the solenoid valve further comprises: a sleeve structure connected to the valve body; the movable iron core is movably arranged in the sleeve structure and is connected with the valve core; and the static iron core is fixedly connected with one end, far away from the valve core, of the sleeve structure.

According to some embodiments of the utility model, the valve core is fixedly connected to one end of the movable iron core adjacent to the connecting channel, and when the movable iron core moves relative to the sleeve structure under the action of magnetic force of the static iron core, the movable iron core drives the valve core to move so as to be separated from or combined with the valve seat.

According to some embodiments of the utility model, a groove is formed on an end face of the movable core adjacent to the communication passage, the groove being opposite to the valve core.

According to some embodiments of the utility model, there is at least one oil groove between the plunger and the sleeve structure.

According to some embodiments of the utility model, the movable iron core comprises a first movable iron core section and a second movable iron core section which are sequentially connected towards the direction of the connecting channel, the first movable iron core section is matched in the sleeve structure, the cross-sectional area of the second movable iron core section is smaller than that of the first movable iron core section, one end, adjacent to the connecting channel, of the second movable iron core section stretches into the valve cavity, and an oil groove is formed in the first movable iron core section, extends along the axial direction of the valve body and penetrates through two end surfaces of the first movable iron core section.

According to some embodiments of the utility model, the spool is a ball.

A vehicle body posture control device according to an embodiment of a second aspect of the present utility model includes the solenoid valve according to the embodiment of the first aspect described above.

An automobile according to an embodiment of a third aspect of the present utility model includes the body posture control device according to the embodiment of the second aspect described above.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic illustration of a solenoid valve according to an embodiment of the utility model;

FIG. 2 is an exploded view of a solenoid valve according to an embodiment of the utility model;

FIG. 3 is a schematic view of an operating state of a solenoid valve according to an embodiment of the utility model, wherein the solenoid valve is in an open state;

FIG. 4 is a schematic view of a valve body of a solenoid valve according to an embodiment of the utility model;

FIG. 5 is a cross-sectional view of a valve body of a solenoid valve according to an embodiment of the utility model;

FIG. 6 is a schematic illustration of a valve seat of a solenoid valve according to an embodiment of the utility model;

FIG. 7 is a cross-sectional view of a valve seat of a solenoid valve according to an embodiment of the utility model;

FIG. 8 is a schematic view of a plunger of a solenoid valve according to an embodiment of the utility model;

fig. 9 is a cross-sectional view of a plunger of a solenoid valve according to an embodiment of the utility model.

Reference numerals:

100. an electromagnetic valve;

11. a sleeve structure; 12. a stationary core;

13. a movable iron core; 131. a groove; 132. an oil groove;

133. a first plunger segment; 134. a second moving core segment;

135. a receiving groove; 14. an elastic member;

2. a valve body; 211. a valve cavity; 212. a first flow passage; 213. a second flow passage;

22. a valve seat; 221. a connecting channel;

2211. a first communication section; 2212. a second communication section; 2213. a third communication section;

222. the second limiting surface; 223. a first valve seat segment; 224. a second valve seat segment; 2241. a step portion;

23. a limit structure; 231. a limit protrusion; 2311. a first limiting surface;

3. a valve core; 4. a coil.

Detailed Description

Embodiments of the present utility model are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary, and a solenoid valve 100 according to an embodiment of the first aspect of the present utility model is described below with reference to fig. 1 to 9.

As shown in fig. 1 to 3, a solenoid valve 100 according to an embodiment of the first aspect of the present utility model includes a valve body 2, a valve seat 22, and a valve body 3.

Specifically, the valve body 2 defines a valve cavity 211 therein, and has a first flow passage 212 and a second flow passage 213 therein, the valve seat 22 is disposed in the valve cavity 211, and the valve seat 22 has a communication passage 221 communicating with the second flow passage 213. For example, when the solenoid valve 100 is open, oil within the hydraulic control system assembly of the attitude suspension assembly or brake may flow from the first flow passage 212 into the valve chamber 211 and out through the connecting passage 221 and the second flow passage 213. In this process, the solenoid valve 100 may control the flow rate of oil flowing through the connecting passage 221. In addition, the valve body 2 and the valve seat 22 are arranged in a split mode, so that the processing difficulty of the valve body 2 can be reduced, the processing precision is improved, and the manufacturing precision of the valve body 2 is improved. In addition, the valve seat 22 is provided in the valve chamber 211, so that the internal space of the valve body 2 can be effectively utilized, which is advantageous for downsizing the solenoid valve 100.

Referring to fig. 1-3 and 5, a limiting structure 23 is disposed between the valve body 2 and the valve seat 22, and the limiting structure 23 is used to limit the valve seat 22 to move in a direction away from (i.e. upward) the second flow channel 213. When the electromagnetic valve 100 is applied to the oil circuit control switch of the hydraulic control system assembly of the suspension and the brake, the working condition pressure of the hydraulic system is larger, the pressure difference between the inside and the outside of the electromagnetic valve 100 is larger, and the valve seat 22 is easy to move away from the second flow passage 213, so that the electromagnetic valve 100 is easy to be unable to be opened, and the electromagnetic valve 100 is easy to malfunction. Therefore, by arranging the limiting structure 23, the valve seat 22 can resist the reverse pressure outside the electromagnetic valve 100 (namely, the force acting on the valve seat upwards along the communication channel 221), so that the valve seat 22 can be prevented from moving towards the direction away from the second flow channel 213 to a limited extent, the valve seat 22 is not easy to generate movement deviation, the normal opening of the electromagnetic valve 100 is facilitated, the damage probability of the electromagnetic valve 100 is reduced, and the service life of the electromagnetic valve 100 is prolonged.

As shown in fig. 1 and 3, the valve body 3 is movably mounted to the valve chamber 211 between a communication position in which the valve body 3 is separated from the valve seat 22 so that the first flow passage 212 communicates with the communication passage 221, and a blocking position in which the valve body 3 is combined with the valve seat 22 so that the first flow passage 212 is blocked from communication with the communication passage 221. When the valve body 3 moves upward to be separated from the valve seat 22, the valve cavity 211 communicates with the communication passage 221, and oil can flow into the valve cavity 211 via the first flow passage 212 and then flow from the communication passage 221 to the outside of the solenoid valve 100, which is in an oil-in state, and the body of the automobile is lifted. The communication passage 221 can be opened and closed by the movement of the spool 3 in the valve chamber 211, and the flow rate of the oil at the communication passage 221 can be regulated.

According to the electromagnetic valve 100 of the embodiment of the utility model, the limiting structure 23 is arranged between the valve body 2 and the valve seat 22, the valve seat 22 can resist the reverse pressure outside the electromagnetic valve 100, the limiting structure 23 can limit the movement of the valve seat 22 towards the direction far away from the second flow passage 212, and the valve seat 22 is not easy to move upwards, so that the valve core 3 cannot be separated from the valve seat 22, thereby being beneficial to the normal use of the electromagnetic valve 100 and reducing the damage probability of the electromagnetic valve 100. In addition, the solenoid valve 100 has fewer parts and simpler structure, is beneficial to the assembly of the solenoid valve 100, and can reduce the production cost of the solenoid valve 100.

According to some embodiments of the present utility model, referring to fig. 1, 5 and 7, the limiting structure 23 includes at least one limiting protrusion 231, the limiting protrusion 231 is disposed on an inner wall surface of the valve cavity 211, a side surface of the limiting protrusion 231, which is far away from the valve core 3, has a first limiting surface 2311, a side surface of the valve seat 22, which is adjacent to the valve core 3, has a second limiting surface 222, and the second limiting surface 222 abuts against the first limiting surface 2311 to limit the movement of the valve seat 22 toward the valve core 3. For example, in the examples of fig. 1, 5 and 7, the limiting structure 23 includes a limiting protrusion 231, the lower surface of the limiting protrusion 231 is a first limiting surface 2311, and the upper surface of the valve seat 22 has a second limiting surface 222. Thus, by the abutment of the first limiting surface 2311 and the second limiting surface 222, the valve seat 22 can resist the reverse pressure outside the electromagnetic valve 100, and the valve seat 22 is not easy to move upwards, so that the valve core 3 is beneficial to be kept at the position of blocking the connecting channel 221 (namely, the electromagnetic valve 100 is in a normally closed state). In addition, the limit protrusion 231 has a simple structure and low cost, so that the electromagnetic valve 100 has a simple structure, and is beneficial to the production and processing of the electromagnetic valve 100.

Alternatively, the limit projection 231 is formed by projecting the inner peripheral wall of the valve body 2 toward the center of the valve body 2 (i.e., the valve body 2 and the limit structure 23 are integrally formed). Thereby, the production and processing of the limit structure 23 are facilitated, and the tightness of the connection of the limit structure 23 and the valve body 2 is improved, so that the stability of the limit structure 23 in long-term use is improved.

According to other embodiments of the present utility model, the limiting structure 23 includes at least one limiting protrusion 231, where the limiting protrusion 231 is a limiting ring table disposed on an inner wall surface of the valve cavity 211, an avoidance ring groove (not shown) is disposed on an outer peripheral surface of the valve seat 22, and the limiting ring table is matched with the avoidance ring groove, and is used for stopping movement of the valve seat 22 in a direction towards the valve core 3. So set up, spacing ring platform can stretch into and dodge in the annular and link to each other with disk seat 22, has increased spacing ring platform and spacing annular area of contact to strengthened being connected between spacing arch 231 and the disk seat 22, increased spacing protruding effort to disk seat 22, disk seat 22 is difficult for upwards moving more, and then has further ensured the normal opening of solenoid valve 100.

According to some embodiments of the present utility model, referring to fig. 6 and 7, the valve seat 22 includes a first valve seat section 223 and a second valve seat section 224, the first valve seat section 223 is opposite to the limit protrusion 231 in the radial direction of the valve body 2 (i.e., the left-right direction in fig. 1), the second valve seat section 224 is connected to an end of the first valve seat section 223 away from the valve core 3, a stepped portion 2241 is formed between the second valve seat section 224 and the first valve seat section 223, and a side surface of the stepped portion 2241 facing the first limit surface 2311 is the second limit surface 222. For example, in the example of fig. 7, a first valve seat section 223 and a second valve seat section 224 are sequentially arranged from top to bottom along the central axis of the valve seat 22, the outer circumferential surface of the first valve seat section 223 is in end face contact with the free end of the limit projection 231, the second valve seat section 224 is connected to the lower end of the first valve seat section 223, and the upper surface of the second valve seat section 224 is the second limit surface 222. Therefore, the contact area of the valve seat 22 and the valve body 2 is increased while the limit effect of the limit structure 23 on the valve seat 22 is ensured, the connection firmness of the valve body 2 and the valve seat 22 is improved, the valve seat 22 is not easy to fall off from the valve body 2, and the long-term use of the valve seat 22 is facilitated, so that the normal use of the electromagnetic valve 100 is further ensured.

Optionally, an interference fit between the valve seat 22 and the valve body 2. Thereby, the use of other fasteners is reduced, the assembly of the valve body 2 and the valve seat 22 is facilitated, and the assembly operation is simple, thereby facilitating the assembly of the solenoid valve 100 and improving the assembly efficiency of the solenoid valve 100. In addition, the valve body 2 and the valve seat 22 are also facilitated to be removed and replaced. In addition, the sealing performance between the valve body 2 and the valve seat 22 is improved, and the probability of leakage of oil in the valve cavity 211 from between the valve body 2 and the valve seat 22 can be reduced.

According to some embodiments of the present utility model, referring to fig. 2 and 7, the communication passage 221 includes a first communication segment 2211, a second communication segment 2212, and a third communication segment 2213 that communicate in order in a direction away from the spool 3, and the cross-sectional area of the first communication segment 2211 gradually decreases in the direction away from the spool 3, and when the spool 3 is combined with the valve seat 22, the spool 3 is stopped against the inner wall surface of the first communication segment 2211. For example, in the example of fig. 2 and 7, the first communication section 2211, the second communication section 2212, and the third communication section 2213 are sequentially provided from top to bottom along the central axis of the valve seat 22, and the cross-sectional area of the first communication section 2211 gradually decreases from top to bottom. Thereby, the contact area between the spool 3 and the first communication section 2211 is increased, and the fitting of the spool 3 with the communication passage 221 is enhanced. In addition, when the valve element 3 closes the communication passage 221 (i.e., when the valve element 3 is combined with the valve seat 22), the sealing performance at the communication passage 221 is improved by the abutment of the valve element 3 with the inner wall surface of the first communication section 2211, the probability of leakage of oil in the valve cavity 211 from between the communication passage 221 and the valve element 3 is reduced, and thus the usability of the electromagnetic valve 100 is improved.

Alternatively, referring to fig. 2 and 7, the cross-sectional area of the third communication section 2213 is larger than the cross-sectional area of the second communication section 2212. Therefore, when the oil flows out from the first communication section 2211 and flows from the second communication section 2212 to the third communication section 2213, the contact area between the oil and the third communication section 2213 can be increased, the amount of the oil flowing out from the third communication section 2213 in unit time is increased, so that the flow of the oil at the communication channel 221 can meet the requirement of customer flow design, and the service performance of the electromagnetic valve 100 is further improved.

Further, the electromagnetic valve 100 further includes a sleeve structure 11, a movable core 13 and a static core 12, the sleeve structure 11 is connected with the valve body 2, the movable core 13 is movably arranged in the sleeve structure 11 and is connected with the valve core 3, and the static core 12 is fixedly connected with one end, far away from the valve core 3, of the sleeve structure 11. For example, in the example of fig. 1 to 3, the sleeve structure 11 extends in the longitudinal direction of the solenoid valve 100 (for example, in the direction indicated by arrow a in fig. 1), the above-described one end of the sleeve structure 11 refers to the upper end of the sleeve structure 11, the stationary core 12 is connected to the upper end of the sleeve structure 11, and the movable core 13 extends in the longitudinal direction of the sleeve structure 11. So set up, sleeve structure 11 can play the guide effect to moving iron core 13 to be favorable to moving iron core 13 along sleeve structure 11 reciprocates, improved moving iron core 13 accuracy of reciprocating. Moreover, the sleeve structure 11 also plays a role in protecting the movable iron core 13, so that the service life of the movable iron core 13 can be prolonged.

Optionally, the electromagnetic valve 100 further includes an elastic member 14, and the elastic member 14 is stopped between the stationary core 12 and the movable core 13. For example, in the example of fig. 1 to 3, the upper end of the elastic member 14 is connected to the stationary core 12, and the lower end of the elastic member 14 is connected to the movable core 13. Therefore, the elastic member 14 can be used for pushing the movable iron core 13 to move downwards, so that the electromagnetic valve 100 is in a normally closed state, the operation is simple, the use cost is low, and the production cost of the electromagnetic valve 100 can be reduced.

Alternatively, the valve core 3 is fixedly connected to an end of the movable core 13 adjacent to the connecting channel 221, and when the movable core 13 moves relative to the sleeve structure 11 under the magnetic force of the static core 12, the movable core 13 drives the valve core 3 to move to be separated from or combined with the valve seat 221. For example, in the example of fig. 1 to 3, the spool 3 is fixedly connected to the lower end of the plunger 13. The operating principle of the solenoid valve 100 is generally as follows: the electromagnetic valve 100 is placed on the inner periphery of the coil 4, when the coil 4 is electrified, the static iron core 12 generates suction force on the movable iron core 13, and the movable iron core 13 can drive the valve core 3 to move upwards so as to separate the valve core 3 from the valve seat 22, so that the valve cavity 211 is communicated with the communicating channel 221, and oil in the valve cavity 211 can flow from the communicating channel 221 to the outside of the electromagnetic valve 100. When the coil 4 is powered off, the force of the stationary core 12 to the movable core 13 is removed, and the movable core 13 and the valve core 3 move downward to close the connecting passage 221 under the action of the elastic member 14. So set up, case 3 and movable iron core 13 are comparatively fastened with connecting, and case 3 is difficult for dropping on the driven iron core 13, is favorable to the permanent use of case 3, has prolonged the life of case 3.

According to some embodiments of the present utility model, a groove 131 is formed on an end surface of the movable core 13 adjacent to the connecting passage 221, the groove 131 being opposite to the valve core 3. For example, in the examples of fig. 2 and 9, the above-described one end face of the plunger 13 refers to the lower end face of the plunger 13, the opening of the groove 131 is downward, and the spool 3 is attached at the groove 131. Therefore, the groove 131 can play a role in positioning the valve core 3, and the positioning accuracy of the movable iron core 13 on the valve core 3 is improved, so that the matching accuracy of the valve core 3 and the connecting channel 221 is improved, and the opening and closing accuracy of the electromagnetic valve 100 is further improved.

Optionally, as shown in fig. 1, 8 and 9, at least one oil groove 132 is provided between the plunger 13 and the sleeve structure 11. So configured, the upper and lower sides of the plunger 13 may communicate through the oil groove 132 between the plunger 13 and the sleeve structure 11, so that the pressure between the upper and lower sides of the plunger 13 is relatively balanced. When the movable iron core 13 moves from bottom to top, the movable iron core 13 cannot move upwards due to unbalanced pressure above and below the movable iron core 13, so that the movable iron core 13 can move smoothly in the sleeve structure 11, and the electromagnetic valve 100 can be opened.

Further alternatively, the plurality of oil grooves 132 are provided, and the plurality of oil grooves 132 are arranged at intervals in the circumferential direction of the plunger 13. In the description of the present utility model, "plurality" means two or more. For example, two oil grooves 132 are shown in the examples of fig. 8 and 9, the two oil grooves 132 being located on both radial sides of the plunger 13. Thereby, the air circulation between the upper and lower parts of the movable iron core 13 is increased, and the pressure balance between the upper and lower parts of the movable iron core 13 is further ensured, so that the movable iron core 13 moves in the sleeve structure 11 more smoothly.

According to some embodiments of the present utility model, referring to fig. 1, 8 and 9, the plunger 13 includes a first plunger segment 133 and a second plunger segment 134 sequentially connected in a direction toward the connecting channel 221, the first plunger segment 133 being fitted in the sleeve structure 11, the second plunger segment 134 having a smaller cross-sectional area than the first plunger segment 133, and an end of the second plunger segment 134 adjacent to the connecting channel 221 extending into the valve cavity 211. For example, in the example of fig. 8 and 9, the upper end of the second plunger segment 134 is connected to the lower end of the first plunger segment 133, and the lower end of the second plunger segment 134 extends into the valve chamber 211 to be connected to the valve spool 3. Therefore, by matching the first movable iron core segment 133 with the sleeve structure 11, the second movable iron core segment 134 is matched with the valve body 2, the sleeve structure 11 has a guiding effect on the first movable iron core segment 133, and the valve cavity 211 has a guiding effect on the second movable iron core segment 134, so that the accuracy of moving the movable iron core 13 up and down is improved. In addition, the assembly of the movable iron core 13 with the sleeve structure 11 and the valve body 2 is facilitated, and the assembly efficiency of the movable iron core 13 with the sleeve structure 11 and the valve body 2 is improved. An oil groove 132 is formed on the first plunger segment 133, and the oil groove 132 extends in the axial direction of the valve body 2 and penetrates both end surfaces of the first plunger segment 133. That is, the oil groove 132 penetrates the upper and lower end surfaces of the first moving core segment 133. So arranged, the pressures at the upper end face and the lower end face of the first movable core segment 133 are relatively balanced, and the movable core 13 can smoothly move upwards, thereby facilitating the smooth opening of the connecting channel 221.

Alternatively, a receiving groove 135 is formed at one end of the movable core 13 adjacent to the stationary core 12, and the elastic member 14 is positioned in the receiving groove 135. For example, in the example of fig. 1 and 3, the upper end of the elastic member 14 is connected to the lower surface of the stationary core 12, and the lower end of the elastic member 14 is stopped against the lower surface of the receiving groove 135. Therefore, the space on the movable iron core 13 can be effectively utilized, and the occupation of the space of the elastic piece 14 in the sleeve structure 11 is reduced, so that the electromagnetic valve 100 can be made smaller and more compact, and the transportation and the use of the electromagnetic valve 100 are facilitated. In addition, the accommodating groove 135 has a guiding function on the elastic element 14, so that the possibility of shifting away from the central axis of the elastic element 14 in the process of compressing or stretching the elastic element 14 can be reduced, and the elastic element 14 can push the movable iron core 13 to close the connecting channel 221.

According to some embodiments of the present utility model, referring to fig. 1-3, the valve core 3 may be provided as a steel ball, but is not limited thereto. The valve core 3 is simple in structure and convenient to produce, and is beneficial to mass production of the valve core 3. Moreover, the steel ball is relatively low in cost, which can reduce the production cost of the solenoid valve 100. In addition, the structural strength of the valve element 3 can be improved, and the durability of the valve element 3 for long-term use can be further improved. It should be noted that the valve core 3 may be made of other materials according to actual requirements, so as to better satisfy the application.

According to some embodiments of the utility model, the sleeve structure 11 and the valve body 2 are non-magnetic pieces. So set up, when coil 4 is circular telegram, quiet iron core 12 produces suction to moving iron core 13, moves iron core 13 and can drive case 3 upward movement in order to make case 3 and disk seat 22 separation, and in this process, quiet iron core 12 is difficult for producing suction to sleeve structure 11 and valve body 2 to move iron core 13 and case 3 and move in-process sleeve structure 11 and valve body 2 can not take place to move, have guaranteed to move iron core 13 and case 3 to being close to quiet iron core 12's removal, be favorable to solenoid valve 100's normal use more.

Alternatively, referring to fig. 1 and 3, a gap is provided between the outer circumferential surface of the first plunger segment 133 and the inner circumferential surface of the sleeve structure 11. Thus, the resistance of the inner peripheral surface of the sleeve structure 11 to the vertical movement of the movable iron core 13 can be reduced, and the sleeve structure 11 guides the movable iron core 13 and the vertical movement of the movable iron core 13 can be smoother.

A vehicle body posture control device (not shown) according to an embodiment of the second aspect of the present utility model includes the solenoid valve 100 according to the embodiment of the first aspect described above.

According to the vehicle body posture control device provided by the embodiment of the utility model, the electromagnetic valve 100 is adopted, so that the vehicle body posture control device is beneficial to controlling the vehicle body posture, and the usability of the vehicle body posture control device is improved.

An automobile (not shown) according to an embodiment of the third aspect of the present utility model includes the vehicle body posture control device according to the embodiment of the second aspect described above.

According to the automobile provided by the embodiment of the utility model, the automobile body posture control device is adopted, so that the automobile body posture control is sensitive, the use is convenient, and the use performance of the automobile is improved.

Other constructions and operations of the solenoid valve 100, the body posture control device, and the automobile according to the embodiment of the present utility model are known to those skilled in the art, and will not be described in detail herein.

In the description of the present utility model, it should be understood that the terms "center," "length," "upper," "lower," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the utility model.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (14)

1. A solenoid valve, comprising:

a valve body defining a valve cavity therein, the valve body having a first flow passage and a second flow passage thereon;

the valve seat is arranged in the valve cavity, a communication channel communicated with the second flow channel is formed in the valve seat, a limiting structure is arranged between the valve body and the valve seat, and the limiting structure is used for limiting the valve seat to move towards a direction away from the second flow channel;

the valve core is movably arranged in the valve cavity between a communication position and a separation position, the valve core is separated from the valve seat when being positioned at the communication position so that the first flow channel is communicated with the communication channel, and the valve core is combined with the valve seat when being positioned at the separation position so that the first flow channel is separated from the communication channel.

2. The electromagnetic valve according to claim 1, wherein the limit structure comprises at least one limit protrusion, the limit protrusion is arranged on the inner wall surface of the valve cavity, and a side surface of the limit protrusion, which is far away from the valve core, is provided with a first limit surface;

the valve seat is provided with a second limiting surface on one side surface adjacent to the valve core, and the second limiting surface is abutted against the first limiting surface to limit the valve seat to move towards the valve core.

3. The electromagnetic valve according to claim 2, wherein the limiting structure comprises at least one limiting protrusion, the limiting protrusion is a limiting ring table arranged on the inner wall surface of the valve cavity, an avoidance ring groove is formed in the outer circumferential surface of the valve seat, the limiting ring table is matched with the avoidance ring groove, and the limiting ring table is used for stopping movement of the valve seat in the direction towards the valve core.

4. The solenoid valve of claim 2 wherein said valve seat comprises:

a first valve seat segment opposing the limit projection in a radial direction of the valve body;

the second valve seat section is connected to one end, far away from the valve core, of the first valve seat section, a step portion is formed between the second valve seat section and the first valve seat section, and one side surface, facing the first limiting surface, of the step portion is the second limiting surface.

5. The electromagnetic valve according to claim 1, wherein the communication passage includes a first communication section, a second communication section, and a third communication section that communicate in this order in a direction away from the spool, a cross-sectional area of the first communication section gradually decreasing in a direction away from the spool, the spool abutting against an inner wall surface of the first communication section when the spool is joined to the valve seat.

6. The solenoid valve of claim 5 wherein the cross-sectional area of said third communication section is greater than the cross-sectional area of said second communication section.

7. The solenoid valve of claim 1, further comprising:

a sleeve structure connected to the valve body;

the movable iron core is movably arranged in the sleeve structure and is connected with the valve core;

and the static iron core is fixedly connected with one end, far away from the valve core, of the sleeve structure.

8. The solenoid valve of claim 7 wherein said spool is fixedly attached to an end of said plunger adjacent said connecting passage, said plunger moving to move said spool apart from or into engagement with said valve seat when said plunger moves relative to said sleeve structure under the influence of the magnetic force of said stationary plunger.

9. The electromagnetic valve according to claim 8, wherein a groove is formed on an end face of the plunger adjacent to the communication passage, the groove being opposed to the spool.

10. The solenoid valve of claim 7 wherein said plunger and said sleeve structure have at least one oil groove therebetween.

11. The solenoid valve of claim 10 wherein said plunger includes first and second plunger segments connected in sequence in a direction toward said connecting passage, said first plunger segment being fitted within said sleeve structure, said second plunger segment having a smaller cross-sectional area than said first plunger segment, an end of said second plunger segment adjacent said connecting passage extending into said valve cavity, said oil groove formed in said first plunger segment, said oil groove extending axially of said valve body and extending through end faces of said first plunger segment.

12. The solenoid valve of claim 1 wherein said spool is a rigid ball.

13. A vehicle body posture control apparatus characterized by comprising the electromagnetic valve according to any one of claims 1 to 12.

14. An automobile, characterized by comprising the body posture control device according to claim 13.