Connecting ring and connecting structure for connecting electromagnetic valve and cylinder barrel

Abstract

The utility model relates to a connecting ring used for connecting an electromagnetic valve and a cylinder barrel and a connecting structure of the electromagnetic valve and the cylinder barrel, which comprise a first end portion of the electromagnetic valve, a connecting portion of the cylinder barrel and the connecting ring, the connecting portion protrudes outwards from the barrel wall of the cylinder barrel to form a protruding portion, and the connecting portion in the connecting structure is formed by protruding the cylinder barrel. A connecting part of the cylinder barrel does not need to be additionally arranged, meanwhile, the first end face of the first connecting boss of the connecting ring makes contact with and is sealed with the lower end face of the electromagnetic valve, the first end, namely the connecting end, of the electromagnetic valve does not need to be slotted or other structures do not need to be additionally arranged, and communication between the oil inlet hole of the electromagnetic valve and the connecting hole of the cylinder barrel is achieved through the connecting ring. The connecting structure and the connecting process are simple; in addition, the first end portion of the electromagnetic valve is coaxially arranged in the valve seat and fixedly connected with the valve seat, and the second connecting boss is clamped between the lower end face of the electromagnetic valve and the connecting portion of the cylinder barrel, so that the connecting relation achieved through the connecting structure is stable.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, in particular to a connecting ring used for connecting a solenoid valve and a cylinder barrel and a connecting structure thereof. Background Art

[0002] The electronically controlled shock absorber is a new type of shock absorber that uses electromagnetic valve technology. The core component of the electronically controlled shock absorber is the electromagnetic valve. The basic structure of the electromagnetic valve includes an electromagnetic coil, an iron core part and a movable part. The electromagnetic coil is composed of a coil wound on the iron core, an isolation ring, and terminals. The coil is the core part of the electromagnet and is generally wound with copper wire; the iron core part is made of ferromagnetic material to enhance the electromagnetic field; the movable part is composed of a disk, a spring, a sealing gasket, etc. The working principle of the electronically controlled shock absorber solenoid valve is mainly achieved by the attraction of the magnetic field of the electromagnetic coil to the disk or the control of the magnetic field on the movable part. The cylinder assembly of the electronically controlled shock absorber is filled with oil and is provided with two inner and outer chambers. The oil can flow through the gap between the two connected chambers. When the wheel bumps, the piston in the electronically controlled shock absorber will move up and down in the sleeve, and the oil in its chamber will flow back and forth between the two chambers under the action of the reciprocating motion of the piston. The electronically controlled shock absorber controls the switch and channel size of the solenoid valve through electric current, that is, controls the switch and size of the oil channel between the middle cylinder of the shock absorber and the oil storage cylinder, changes the reciprocating resistance of the oil between the chambers, thereby realizing the change of the damping of the electronically controlled shock absorber, thereby realizing the continuous adjustability of the damping force of the shock absorber as a whole.

[0003] The existing electronically controlled shock absorbers are divided into two types: solenoid valve external and intelligent valve internal. In the solenoid valve external structure, the intermediate cylinder is indispensable. The solenoid valve and the intermediate cylinder need to be connected through a connecting component, so that when the solenoid valve is turned on, the shock-absorbing fluid in the outer cavity between the outer cylinder and the inner cylinder flows into the intermediate chamber between the inner cylinder and the outer cylinder through the solenoid valve, or flows out in the opposite direction, so that the shock-absorbing fluid on both sides of the piston is transferred to change the position of the piston in the inner cavity; when the solenoid valve is closed, the flow transfer is blocked. The connecting component is generally connected to the side wall of the intermediate cylinder and sealed. The existing connecting component includes a connecting sleeve and a ferrule. The side wall of the intermediate cylinder is provided with a solenoid valve mounting hole. The ferrule connects the side wall of the intermediate cylinder and one end of the connecting sleeve. The connection method is generally welding, which has high requirements on the welding process and cannot have impurities such as welding slag. The other end of the connecting sleeve contacts the lower end of the solenoid valve, and the sealing is generally achieved by sandwiching a sealing ring between the end face and the connecting component. The above connection method requires additional parts and increases the complexity of the process. The two ends of another connection component are respectively inserted into the side wall of the middle cylinder and the lower end of the solenoid valve. In this case, a slot structure must be provided at the lower end of the solenoid valve. However, slotting the overall structure of the solenoid valve will increase the difficulty of the process and the entire manufacturing process. Therefore, the utility model needs to design a connection component for the external structure of the solenoid valve of the electric control shock absorber to solve the problem of the complex connection structure and connection process between the solenoid valve and the middle cylinder. Utility Model Content

[0004] In view of some shortcomings of the above-mentioned prior art, the utility model provides a connecting ring and a connecting structure for connecting the solenoid valve and the cylinder barrel. The connecting ring connects the solenoid valve and the intermediate cylinder, solving the problem of the complicated connecting structure and connecting process between the solenoid valve and the intermediate cylinder.

[0005] The utility model provides a connecting ring for connecting a solenoid valve and a cylinder, comprising:

[0006] A connecting ring body, the connecting ring body comprising a first connecting boss and a second connecting boss extending in two directions away from each other, a center hole penetrating the first connecting boss and the second connecting boss is provided at the center of the connecting ring body, and an outer diameter of the first connecting boss is greater than an outer diameter of the second connecting boss;

[0007] Among them, a first sealing groove surrounding a center hole is provided on a first end face of the first connecting boss away from the second connecting boss, the lower end face of the solenoid valve is pressed onto the first end face of the first connecting boss, and a first sealing member is installed in the first sealing groove to seal the gap between the lower end face of the solenoid valve and the first end face of the first connecting boss; a second sealing groove is provided on the side wall surface of the second connecting boss, the second connecting boss extends into a connecting hole in a connecting portion protruding outward from the wall of the cylinder, the side wall surface of the second connecting boss is in close contact with the hole wall of the connecting hole, and a second sealing member is provided in the second sealing groove to seal the gap between the side wall surface of the second connecting boss and the hole wall of the connecting hole; the second end face of the first connecting boss opposite to the first end face is in close contact with the outward protruding end face of the connecting portion of the cylinder.

[0008] In an embodiment of the present invention, the outer periphery of the first end surface of the first connecting boss integrally extends toward the lower end surface of the solenoid valve to form a guide wall.

[0009] In an embodiment of the present invention, the first sealing member and the second sealing member are O-rings.

[0010] The utility model also includes a connection structure between a solenoid valve and a cylinder of an electric-controlled shock absorber, wherein a first end portion of the solenoid valve is coaxially arranged in a valve seat and fixedly connected to the valve seat;

[0011] The connecting part of the cylinder is a convex part extending outward from the cylinder wall, and the connecting part is provided with a connecting hole that passes through the cylinder wall and the connecting part;

[0012] A connecting ring, the connecting ring comprising a first connecting boss and a second connecting boss extending in two directions away from each other, a center hole penetrating the first connecting boss and the second connecting boss is provided at the center of the connecting ring, a first sealing groove surrounding the center hole is provided on a first end surface of the first connecting boss away from the second connecting boss, and a second sealing groove is provided on a side wall surface of the second connecting boss;

[0013] Among them, the first end of the solenoid valve is pressed on the first end face of the first connecting boss; the second connecting boss extends into the connecting hole of the connecting part of the cylinder, and the side wall surface of the second connecting boss is in close contact with the hole wall of the connecting hole; the second end face of the first connecting boss opposite to the first end face is in close contact with the outward protruding end face of the connecting part of the cylinder.

[0014] In an embodiment of the present invention, the outer periphery of the first end surface of the first connecting boss integrally extends toward the first end portion of the solenoid valve to form a guide wall.

[0015] In one embodiment of the present invention, a first sealing member is installed in the first sealing groove to seal the gap between the lower end surface of the first end portion of the solenoid valve and the first end surface of the first connecting boss.

[0016] In an embodiment of the present invention, a second sealing member is disposed in the second sealing groove to seal the gap between the side wall surface of the second connecting boss and the hole wall of the connecting hole.

[0017] In an embodiment of the present invention, the axis of the connecting ring and the axis of the cylinder are perpendicular to each other.

[0018] In an embodiment of the present invention, the axis of the connecting ring is coaxially arranged with the axis of the solenoid valve.

[0019] In an embodiment of the present invention, an outer diameter of the first connecting boss is greater than an outer diameter of the second connecting boss.

[0020] The beneficial technical effects of the utility model include at least:

[0021] (1) The utility model provides a connecting ring for connecting a solenoid valve and a cylinder, comprising a connecting ring body, the connecting ring body comprising a first connecting boss and a second connecting boss extending integrally in two directions away from each other, a center hole penetrating the first connecting boss and the second connecting boss is provided at the center of the connecting ring body, a first sealing groove surrounding the center hole is provided on a first end face of the first connecting boss away from the second connecting boss, a lower end face of the solenoid valve is pressed onto the first end face of the first connecting boss, a first sealing member is provided in the first sealing groove to seal a gap between the lower end face of the solenoid valve and the first end face of the first connecting boss; a second sealing groove is provided on a side wall surface of the second connecting boss, the second connecting boss extends into a connecting hole in a connecting portion protruding outward from the wall of the cylinder, the side wall surface of the second connecting boss is in close contact with the hole wall of the connecting hole, a second sealing member is provided in the second sealing groove to seal a gap between the side wall surface of the second connecting boss and the hole wall of the connecting hole; a second end face of the first connecting boss opposite to the first end face is in close contact with an outwardly protruding end face of the connecting portion of the cylinder.

[0022] Therefore, the first end face of the first connecting boss of the connecting ring of the utility model is in contact with and sealed with the lower end face of the solenoid valve, and the side wall surface of the second connecting boss is in close contact with and sealed with the hole wall of the connecting hole, thereby realizing that the connecting ring connects the oil inlet hole of the solenoid valve and the connecting hole of the cylinder barrel, that is, connects the solenoid valve and the intermediate cylinder; in summary, the connecting ring of the utility model has a simple structure, a simple installation process and a stable installation.

[0023] (2) The connection structure between the solenoid valve and the cylinder of the utility model includes a first end portion of the solenoid valve, a connecting portion of the cylinder and a connecting ring. The connecting portion is a convex portion extending outward from the cylinder wall to form a connecting hole that passes through the cylinder wall and the connecting portion.

[0024] Therefore, in the connection structure of the utility model, the connection part is formed by the protrusion of the cylinder barrel, and there is no need to add a connecting component of the cylinder barrel. At the same time, the first end face of the first connecting boss of the connecting ring is in contact with and sealed with the lower end face of the solenoid valve, and there is no need to groove or add other structures on the first end part of the solenoid valve, that is, the connecting end part, that is, there is no need to add a connecting structure to the solenoid valve. The oil inlet hole of the solenoid valve and the connecting hole of the cylinder barrel can be connected only by the connecting ring, so that the connection structure and connection process of the utility model are simple; furthermore, the first end part of the solenoid valve is coaxially arranged in the valve seat and fixedly connected to the valve seat, and the second connecting boss is clamped between the lower end face of the solenoid valve and the connecting part of the cylinder barrel, so that the connection relationship realized by the connection structure of the utility model is relatively stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of a connection structure for connecting a solenoid valve and a cylinder provided in one embodiment of the utility model.

[0026] Figure 2 for Figure 1 Enlarged view of point A.

[0027] Figure 3 for Figure 2 Exploded view of.

[0028] Component Symbols:

[0029] Connecting ring 1, connecting ring body 10, first connecting boss 11, first end face 111, guide wall 1111, second end face 112, first sealing groove 113, first sealing member 1131, second connecting boss 12, second sealing groove 121, second sealing member 1211, center hole 13, cylinder 2, cylinder wall 21, connecting hole 22, connecting portion 23, solenoid valve 3, first end portion 31, lower end face 311, valve seat 32. DETAILED DESCRIPTION

[0030] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0031] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0032] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present invention difficult to understand.

[0033] See also Figure 1 and Figure 2 The utility model discloses a connecting ring for connecting a solenoid valve and a cylinder, comprising a connecting ring body 10. The connecting ring body 10 comprises a first connecting boss 11 and a second connecting boss 12 extending in two directions away from each other, a center hole 13 penetrating the first connecting boss 11 and the second connecting boss 12 is provided at the center of the connecting ring body 10, and the outer diameter of the first connecting boss 11 is greater than the outer diameter of the second connecting boss 12; a first sealing groove 113 surrounding the center hole 13 is provided on a first end face 111 of the first connecting boss 11 away from the second connecting boss 12, a lower end face 311 of the solenoid valve 3 is press-fitted on the first end face 111 of the first connecting boss 11, and a first sealing member 1131 is installed in the first sealing groove 113 to seal the first end 311 of the solenoid valve 3 The gap between the lower end surface 311 of the first connecting boss 11 and the first end surface 111 of the first connecting boss 11; the side wall surface of the second connecting boss 12 is provided with a second sealing groove 121, and the second connecting boss 12 extends into the connecting hole 22 in the connecting portion 23 protruding outward from the barrel wall 21 of the cylinder 2, and the side wall surface of the second connecting boss 12 is in close contact with the hole wall of the connecting hole 22. A second sealing member 1211 is provided in the second sealing groove 121 to seal the gap between the side wall surface of the second connecting boss 12 and the hole wall of the connecting hole 22; the second end surface 112 of the first connecting boss 11 opposite to the first end surface 111 is in close contact with the outward protruding end surface of the connecting portion 23 of the cylinder 2. Therefore, the connecting ring of the utility model includes a connecting ring body 10 and a first connecting boss 11 and a second connecting boss 12 integrally extending from the connecting ring body 10, and matching seals and sealing grooves are respectively arranged on the first boss 11 and the second boss 12, so that the overall structure of the utility model is simple, and the installation process is simple and convenient during installation.

[0034] In one embodiment of the utility model, the outer periphery of the first end surface 111 of the first connecting boss 11 integrally extends toward the lower end surface 311 of the solenoid valve 3 to form a guide wall 21. When the first end surface 111 of the first connecting boss 11 contacts the lower end surface 311 of the solenoid valve 3, the guide wall 21 plays a guiding role, further connecting the oil inlet hole 312 of the solenoid valve 3 and the central hole 13 of the connecting ring body 10. The first sealing member 1131 and the second sealing member 1211 are O-rings.

[0035] The utility model also includes a connection structure of a solenoid valve 3 and a cylinder 2 of an electric-controlled shock absorber, comprising a first end 31 of the solenoid valve 3 , a connection portion 23 of the cylinder 2 and a connection ring 1 .

[0036] The first end portion 31 is coaxially arranged in the valve seat 32 and fixedly connected to the valve seat 32; the connecting portion 23 is a convex portion protruding outward from the wall of the cylinder 2, and the connecting portion 23 is provided with a connecting hole 22 that passes through the wall of the cylinder 2 and the connecting portion 23; the connecting ring 1 includes a first connecting boss 11 and a second connecting boss 12 that extend integrally in two directions away from each other, and a center hole 13 that passes through the first connecting boss 11 and the second connecting boss 12 is provided at the center of the connecting ring 1, and a first sealing groove 113 surrounding the center hole 13 is provided on the first end surface 111 of the first connecting boss 11 away from the second connecting boss 12, and a second sealing groove 121 is provided on the side wall surface of the second connecting boss 12. Therefore, in the connection structure of the utility model, the connection part 23 is formed by the protrusion of the cylinder wall 21 of the cylinder 2, and there is no need to add additional connecting components of the cylinder 2. At the same time, the first end face 111 of the first connecting boss 11 and the lower end face 311 of the solenoid valve 3 are in contact and sealed, and there is no need to groove the solenoid valve 3 or add other structures, so that the connection structure and connection process of the utility model are simple.

[0037] In one embodiment of the utility model, the outer diameter of the first connecting boss 11 is greater than the outer diameter of the second connecting boss 12. The lower end face 311 of the first end portion 31 of the solenoid valve 3 is pressed onto the first end face 111 of the first connecting boss 11; the second connecting boss 12 extends into the connecting hole 22 of the connecting portion 23 of the cylinder 2, and the side wall surface of the second connecting boss 12 is in close contact with the hole wall of the connecting hole 22; the second end face 112 of the first connecting boss 11 opposite to the first end face 111 is in close contact with the end face protruding outward of the connecting portion 23 of the cylinder 2. The first sealing member 1131 is installed in the first sealing groove 113 to seal the gap between the lower end face 311 of the solenoid valve 3 and the first end face 111 of the first connecting boss 11. The second sealing member 1211 is provided in the second sealing groove 121 to seal the gap between the side wall surface of the second connecting boss 12 and the hole wall of the connecting hole 22.

[0038] In one embodiment of the present invention, the axis of the connecting ring 1 is perpendicular to the axis of the cylinder 2, and the axis of the connecting ring 1 is coaxial with the axis of the solenoid valve 3, so as to ensure that the positions of the components of the connecting structure are accurate and the connections are firm.

[0039] In summary, the utility model provides a connecting ring and a connecting structure for connecting a solenoid valve and a cylinder barrel, and solves the following problems:

[0040] (1) The problem of the complicated connection structure and process between the current solenoid valve 3 and the cylinder 2 is solved. The connection part 23 in the connection structure is formed by the protrusion of the cylinder 2, and there is no need to add a connection component of the cylinder 2. At the same time, the first end face 111 of the first connection boss 11 of the connecting ring 1 and the lower end face 311 of the solenoid valve 3 are in contact and sealed. There is no need to groove or add other structures on the first end 31 of the solenoid valve 3, that is, the connection end. In other words, there is no need to add a connection structure to the solenoid valve 3. The oil inlet hole 312 of the solenoid valve 3 and the connection hole 22 of the cylinder 2 can be connected only by the connecting ring 1, so that the connecting ring 1 and the connection structure of the utility model are simple, and the connection process is also simplified accordingly.

[0041] (2) To reduce the displacement of the solenoid valve 3 relative to the connecting portion on the cylinder 2 during the spinning and sealing process of the electric-controlled shock absorber, the first end portion 31 of the solenoid valve 3 is coaxially arranged in the valve seat 32 and fixedly connected to the valve seat 32, so that the second connecting boss 12 is clamped between the lower end surface 311 of the solenoid valve 3 and the connecting portion 23 of the cylinder 2. The relative positions of the solenoid valve 3 and the connecting portion 23 are relatively limited and constrained by the connecting ring body 10, which can reduce the displacement of the solenoid valve 3 relative to the connecting portion 23 on the cylinder 2 during the spinning and sealing process of the electric-controlled shock absorber, thereby improving the stability of the connection.

[0042] The flow chart and block diagram in the accompanying drawings illustrate the possible implementation architecture, function and operation of the method and computer program product according to various embodiments of the utility model. In this regard, each box in the flow chart or block diagram can represent a module, a program segment, or a part of a code, and the module, the program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0043] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A connecting ring for connecting a solenoid valve and a cylinder, characterized in that: include: A connecting ring body (10), the connecting ring body (10) comprising a first connecting boss (11) and a second connecting boss (12) which extend in two directions away from each other, a center hole (13) penetrating the first connecting boss (11) and the second connecting boss (12) is provided at the center of the connecting ring body (10), and the outer diameter of the first connecting boss (11) is greater than the outer diameter of the second connecting boss (12); A first sealing groove (113) surrounding the center hole (13) is provided on a first end surface (111) of the first connecting boss (11) away from the second connecting boss (12); a lower end surface (311) of the solenoid valve (3) is pressed onto the first end surface (111) of the first connecting boss (11); a first sealing member (1131) is installed in the first sealing groove (113) to seal a gap between the lower end surface (311) of the solenoid valve (3) and the first end surface (111) of the first connecting boss (11); a second sealing groove (121) is provided on the side wall surface of the second connecting boss (12); The second connecting boss (12) extends into a connecting hole (22) in a connecting portion (23) protruding outward from the barrel wall (21) of the cylinder barrel (2); the side wall surface of the second connecting boss (12) is in close contact with the hole wall of the connecting hole (22); a second sealing member (1211) is provided in the second sealing groove (121) to seal the gap between the side surface of the second connecting boss (12) and the hole wall of the connecting hole (22); a second end face (112) of the first connecting boss (11) opposite to the first end face (111) is in close contact with the end face of the connecting portion (23) of the cylinder barrel (2) protruding outward.

2. The connecting ring according to claim 1, characterized in that: The outer periphery of the first end surface (111) of the first connecting boss (11) integrally extends toward the lower end surface (311) of the solenoid valve (3) to form a guide wall (1111).

3. The connecting ring according to claim 2, characterized in that: include: The first sealing member (1131) and the second sealing member (1211) are O-rings.

4. A connection structure for connecting a solenoid valve and a cylinder, characterized in that: include: A first end portion (31) of the solenoid valve (3), wherein the first end portion (31) is coaxially arranged in the valve seat (32) and fixedly connected to the valve seat (32); A connecting portion (23) of the cylinder (2), the connecting portion (23) being a convex portion extending outward from the cylinder wall (21) of the cylinder (2), and the connecting portion (23) being provided with a connecting hole (22) passing through the cylinder wall (21) of the cylinder (2) and the connecting portion (23); A connecting ring (1), the connecting ring (1) comprising a first connecting boss (11) and a second connecting boss (12) which extend integrally in two directions away from each other, a center hole (13) penetrating the first connecting boss (11) and the second connecting boss (12) being provided at the center of the connecting ring (1), a first sealing groove (113) surrounding the center hole (13) being provided on a first end surface (111) of the first connecting boss (11) away from the second connecting boss (12), and a second sealing groove (121) being provided on a side wall surface of the second connecting boss (12); The first end portion (31) of the solenoid valve (3) is pressed onto the first end face (111) of the first connecting boss (11); the second connecting boss (12) extends into the connecting hole (22) of the connecting portion (23) of the cylinder (2), and the side wall surface of the second connecting boss (12) is in tight contact with the hole wall of the connecting hole (22); the second end face (112) of the first connecting boss (11) opposite to the first end face (111) is in tight contact with the outwardly protruding end face of the connecting portion (23) of the cylinder (2).

5. The connection structure according to claim 4, characterized in that: The outer periphery of the first end surface (111) of the first connecting boss (11) integrally extends toward the first end portion (31) of the solenoid valve (3) to form a guide wall (1111).

6. The connection structure according to claim 4, characterized in that: A first sealing member (1131) is installed in the first sealing groove (113) to seal the gap between the lower end surface (311) of the first end portion (31) of the solenoid valve (3) and the first end surface (111) of the first connecting boss (11).

7. The connection structure according to claim 4, characterized in that: A second sealing member (1211) is provided in the second sealing groove (121) to seal the gap between the side wall surface of the second connecting boss (12) and the hole wall of the connecting hole (22).

8. The connection structure according to claim 4, characterized in that: The axis of the connecting ring (1) and the axis of the cylinder (2) are perpendicular to each other.

9. The connection structure according to claim 8, characterized in that: The axis of the connecting ring (1) is coaxially arranged with the axis of the solenoid valve (3).

10. The connection structure according to claim 4, characterized in that: The outer diameter of the first connecting boss (11) is greater than the outer diameter of the second connecting boss (12).

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