Multi-cavity air spring support assembly

Abstract

The utility model relates to a multi-chamber air spring support assembly which comprises an outer support, an air chamber isolation cover and an electromagnetic valve, an inner support is arranged on the inner side of the bottom of the outer support, the upper portion of the outer side wall of the air chamber isolation cover is detachably connected with the upper portion of the inner side wall of the outer support, and the bottom of the electromagnetic valve is installed on the inner support. The top of the electromagnetic valve is inserted into a socket slot in the bottom of the air chamber isolation hood; a first cavity is defined by the top end of the electromagnetic valve and the inner side wall of the air chamber isolation hood, a second cavity is defined by the electromagnetic valve, the outer side wall of the air chamber isolation hood, the inner side wall of the outer support and the outer side wall of the inner support, and an air nozzle is installed on one side of the lower portion of the outer support. The multi-cavity air spring cavity support has the beneficial effects that the assembly is convenient, the assembly equipment is simplified, a new scheme is provided for the structural design and assembly of the multi-cavity air spring cavity support, and the dependence of the formation of the multi-cavity air spring cavity support on a foundry casting process, hot gas welding and ultrasonic welding equipment is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of air springs, in particular to a multi-chamber air spring support assembly. Background Art

[0002] The multi-chamber air springs currently on the market place high demands on manufacturing equipment and process conditions. The primary method for forming the chambers is to heat and pressure-fuse two pieces of plastic using ultrasonic and hot-air welding, creating separate chambers. Solenoid valves are then installed to control the isolation and connection between the chambers. This product places high demands on the manufacturing process, manufacturing environment, and raw materials, resulting in a high defect rate and high costs. Furthermore, the additional ultrasonic and hot-air welding equipment also requires significant investment and is not environmentally friendly. Utility Model Content

[0003] The purpose of the present utility model is to overcome the above problems existing in the prior art and provide a multi-chamber air spring support assembly.

[0004] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0005] A multi-chamber air spring support assembly includes a trumpet-shaped outer support, a trumpet-shaped air chamber isolation cover, and a solenoid valve. A trumpet-shaped inner support is provided on the inner side of the bottom of the outer support. The upper part of the outer side wall of the air chamber isolation cover is detachably connected to the upper part of the inner side wall of the outer support. The bottom of the solenoid valve is installed on the inner support, and a first sealing ring clamped between the solenoid valve and the inner support is installed on the outer side wall of the lower part of the solenoid valve. The top of the solenoid valve is inserted into the socket slot at the bottom of the air chamber isolation cover; the top of the solenoid valve and the inner side wall of the air chamber isolation cover enclose a first chamber, and the solenoid valve, the outer side wall of the air chamber isolation cover, the inner side wall of the outer support, and the outer side wall of the inner support enclose a second chamber. An air nozzle connected to the second chamber is installed on one side of the lower part of the outer support.

[0006] Wherein, the outer support, inner support, air chamber isolation cover and solenoid valve are coaxial.

[0007] Wherein, a plurality of ribs arranged in a circular array are fixedly connected between the inner side wall of the outer support and the outer side wall of the inner support.

[0008] Wherein, the inner support and the outer support are made in one piece.

[0009] In a preferred embodiment, a first sealing ring groove and a first external thread are provided on the upper portion of the outer wall of the air chamber isolation cover, and the first sealing ring groove is located above the first external thread, and a first internal thread is provided on the upper portion of the inner wall of the outer support, and the first internal thread is screwed into the first external thread; a second sealing ring is installed in the first sealing ring groove and clamped between the upper portion of the outer wall of the air chamber isolation cover and the upper portion of the inner wall of the outer support; a first retaining spring mounting groove is provided on the inner wall of the inner support, and a first retaining spring is installed in the first retaining spring mounting groove, the bottom of the solenoid valve is sleeved in the first retaining spring, and a first gasket is clamped between the top of the first retaining spring and the solenoid valve.

[0010] In another preferred embodiment, a second sealing ring groove and a second external thread are provided on the upper portion of the outer wall of the air chamber isolation cover, and the second sealing ring groove is located above the second external thread, and a second internal thread is provided on the upper portion of the inner wall of the outer support, and the second internal thread is screwed into the second external thread; a third sealing ring is installed in the second sealing ring groove and is clamped between the upper portion of the outer wall of the air chamber isolation cover and the upper portion of the inner wall of the outer support; a third internal thread is provided on the inner wall of the inner support, and a first external thread ring is screwed into the third internal thread, and the bottom of the solenoid valve is sleeved in the first external thread ring.

[0011] In another preferred embodiment, a third sealing ring groove and a fourth external thread are provided on the upper portion of the outer wall of the air chamber isolation cover, and the third sealing ring groove is located below the fourth external thread, and a fourth internal thread is provided on the upper portion of the inner wall of the outer support, and the fourth internal thread is screwed into the fourth external thread; a fourth sealing ring is installed in the third sealing ring groove and is clamped between the upper portion of the outer wall of the air chamber isolation cover and the upper portion of the inner wall of the outer support; a second retaining spring mounting groove is provided on the inner wall of the inner support, a second retaining spring is installed in the second retaining spring mounting groove, the bottom of the solenoid valve is sleeved in the second retaining spring, and a second gasket is clamped between the top of the second retaining spring and the solenoid valve.

[0012] In another preferred embodiment, a third retaining ring installation groove is provided on the upper part of the inner wall of the outer support, a third retaining ring is installed in the third retaining ring installation groove, and the bottom end of the third retaining ring abuts against the top end of the air chamber isolation cover; a fourth sealing ring groove is provided on the upper part of the outer wall of the air chamber isolation cover, a fifth sealing ring is installed in the fourth sealing ring groove and is clamped between the upper part of the outer wall of the air chamber isolation cover and the upper part of the inner wall of the outer support; a fifth internal thread is provided on the inner wall of the inner support, a second external thread ring is screwed into the fifth internal thread, and the bottom of the solenoid valve is sleeved in the second external thread ring.

[0013] In another preferred embodiment, a fifth sealing ring groove and a sixth external thread are provided on the upper portion of the outer wall of the air chamber isolation cover, and the fifth sealing ring groove is located above the sixth external thread, and a sixth internal thread is provided on the upper portion of the inner wall of the outer support, and the sixth internal thread is screwed into the sixth external thread; a sixth sealing ring is installed in the fifth sealing ring groove and is clamped between the upper portion of the outer wall of the air chamber isolation cover and the upper portion of the inner wall of the outer support; the inner wall of the inner support is provided with a circle of inwardly protruding support ring, the bottom of the solenoid valve is sleeved in the support ring, and the solenoid valve is clamped between the support ring and the air chamber isolation cover.

[0014] The beneficial effects of the utility model are: the outer support and the air chamber isolation cover are connected in a detachable connection manner, and the inner support and the solenoid valve are connected in a detachable connection manner, which facilitates assembly and simplifies assembly equipment, provides a new solution for the structural design and assembly of multi-chamber air spring cavity supports, and avoids the dependence of the formation of multi-chamber air spring cavity supports on sand casting technology, hot air welding and ultrasonic welding equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1 This is a structural diagram of a multi-chamber air spring support assembly in the first embodiment of the present utility model;

[0017] Figure 2 This is a structural diagram of a multi-chamber air spring support assembly in the second embodiment of the present utility model;

[0018] Figure 3 This is a structural diagram of a multi-chamber air spring support assembly in the third embodiment of the present utility model;

[0019] Figure 4 This is a structural diagram of a multi-chamber air spring support assembly in a fourth embodiment of the present utility model;

[0020] Figure 5 This is a schematic structural diagram of a multi-chamber air spring support assembly in a fifth embodiment of the present invention;

[0021] Explanation of the numbers in the figure: outer support 1, inner support 2, air chamber isolation cover 3, solenoid valve 4, first sealing ring 5, socket slot 6, first chamber 7, second chamber 8, air nozzle 9, rib 10, first sealing ring groove 11, first external thread 12, first internal thread 13, second sealing ring 14, first retaining spring mounting groove 15, first retaining spring 16, first gasket 17, second sealing ring groove 18, second external thread 19, second internal thread 20, third sealing ring 21, third internal thread 2 2. First external thread ring 23, third sealing ring groove 24, fourth external thread 25, fourth internal thread 26, fourth sealing ring 27, second retaining ring mounting groove 28, second retaining ring 29, second gasket 30, third retaining ring mounting groove 31, third retaining ring 32, fourth sealing ring groove 33, fifth sealing ring 34, fifth internal thread 35, second external thread ring 36, fifth sealing ring groove 37, sixth external thread 38, sixth internal thread 39, sixth sealing ring 40, support ring 41. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0023] like Figure 1 The first embodiment shown is a multi-chamber air spring support assembly, including a trumpet-shaped outer support 1, a trumpet-shaped air chamber isolation cover 3, and a solenoid valve 4. A trumpet-shaped inner support 2 is provided on the inner side of the bottom of the outer support 1. The inner support 2 is made integrally with the outer support 1, and a plurality of ribs 10 arranged in a circular array are fixedly connected between the inner wall of the outer support 1 and the outer wall of the inner support 2.

[0024] The upper part of the outer wall of the air chamber isolation cover 3 is detachably connected to the upper part of the inner wall of the outer support 1, the bottom of the solenoid valve 4 is installed on the inner support 2, and a first sealing ring 5 is installed on the outer wall of the lower part of the solenoid valve 4, which is clamped between the solenoid valve 4 and the inner support 2. The top of the solenoid valve 4 is inserted into the socket 6 at the bottom of the air chamber isolation cover 3, and the outer support 1, inner support 2, air chamber isolation cover 3, and solenoid valve 4 are coaxial.

[0025] The top of the solenoid valve 4 and the inner wall of the air chamber isolation cover 3 form a first chamber 7, and the solenoid valve 4 and the outer wall of the air chamber isolation cover 3, the inner wall of the outer support 1, and the outer wall of the inner support 2 form a second chamber 8. An air nozzle 9 connected to the second chamber 8 is installed on one side of the lower part of the outer support 1.

[0026] A first sealing ring groove 11 and a first external thread 12 are provided on the upper part of the outer wall of the air chamber isolation cover 3, and the first sealing ring groove 11 is located above the first external thread 12, and a first internal thread 13 is provided on the upper part of the inner wall of the outer support 1, and the first internal thread 13 is screwed with the first external thread 12; a second sealing ring 14 is installed in the first sealing ring groove 11 and clamped between the upper part of the outer wall of the air chamber isolation cover 3 and the upper part of the inner wall of the outer support 1; a first retaining spring mounting groove 15 is provided on the inner wall of the inner support 2, and a first retaining spring 16 is installed in the first retaining spring mounting groove 15, the bottom of the solenoid valve 4 is sleeved in the first retaining spring 16, and a first gasket 17 is clamped between the top of the first retaining spring 16 and the solenoid valve 4.

[0027] like Figure 2 The second embodiment shown is a multi-chamber air spring support assembly, including a trumpet-shaped outer support 1, a trumpet-shaped air chamber isolation cover 3, and a solenoid valve 4. A trumpet-shaped inner support 2 is provided on the inner side of the bottom of the outer support 1. The inner support 2 and the outer support 1 are made integrally. A plurality of ribs 10 arranged in a circular array are fixedly connected between the inner wall of the outer support 1 and the outer wall of the inner support 2.

[0028] The upper part of the outer wall of the air chamber isolation cover 3 is detachably connected to the upper part of the inner wall of the outer support 1, the bottom of the solenoid valve 4 is installed on the inner support 2, and a first sealing ring 5 is installed on the outer wall of the lower part of the solenoid valve 4, which is clamped between the solenoid valve 4 and the inner support 2. The top of the solenoid valve 4 is inserted into the socket 6 at the bottom of the air chamber isolation cover 3, and the outer support 1, inner support 2, air chamber isolation cover 3, and solenoid valve 4 are coaxial.

[0029] The top of the solenoid valve 4 and the inner wall of the air chamber isolation cover 3 form a first chamber 7, and the solenoid valve 4 and the outer wall of the air chamber isolation cover 3, the inner wall of the outer support 1, and the outer wall of the inner support 2 form a second chamber 8. An air nozzle 9 connected to the second chamber 8 is installed on one side of the lower part of the outer support 1.

[0030] A second sealing ring groove 18 and a second external thread 19 are provided on the upper part of the outer wall of the air chamber isolation cover 3, and the second sealing ring groove 18 is located above the second external thread 19, and a second internal thread 20 is provided on the upper part of the inner wall of the outer support 1, and the second internal thread 20 is screwed with the second external thread 19; a third sealing ring 21 is installed in the second sealing ring groove 18 and is clamped between the upper part of the outer wall of the air chamber isolation cover 3 and the upper part of the inner wall of the outer support 1; a third internal thread 22 is provided on the inner wall of the inner support 2, and a first external thread ring 23 is screwed into the third internal thread 22, and the bottom of the solenoid valve 4 is sleeved in the first external thread ring 23.

[0031] like Figure 3The third embodiment shown is a multi-chamber air spring support assembly, including a trumpet-shaped outer support 1, a trumpet-shaped air chamber isolation cover 3, and a solenoid valve 4. A trumpet-shaped inner support 2 is provided on the inner side of the bottom of the outer support 1. The inner support 2 and the outer support 1 are made as one piece. A plurality of ribs 10 arranged in a circular array are fixedly connected between the inner wall of the outer support 1 and the outer wall of the inner support 2.

[0032] The upper part of the outer wall of the air chamber isolation cover 3 is detachably connected to the upper part of the inner wall of the outer support 1, the bottom of the solenoid valve 4 is installed on the inner support 2, and a first sealing ring 5 is installed on the outer wall of the lower part of the solenoid valve 4, which is clamped between the solenoid valve 4 and the inner support 2. The top of the solenoid valve 4 is inserted into the socket 6 at the bottom of the air chamber isolation cover 3, and the outer support 1, inner support 2, air chamber isolation cover 3, and solenoid valve 4 are coaxial.

[0033] The top of the solenoid valve 4 and the inner wall of the air chamber isolation cover 3 form a first chamber 7, and the solenoid valve 4 and the outer wall of the air chamber isolation cover 3, the inner wall of the outer support 1, and the outer wall of the inner support 2 form a second chamber 8. An air nozzle 9 connected to the second chamber 8 is installed on one side of the lower part of the outer support 1.

[0034] A third sealing ring groove 24 and a fourth external thread 25 are provided on the upper part of the outer wall of the air chamber isolation cover 3, and the third sealing ring groove 24 is located below the fourth external thread 25, and a fourth internal thread 26 is provided on the upper part of the inner wall of the outer support 1, and the fourth internal thread 26 is screwed with the fourth external thread 25; a fourth sealing ring 27 is installed in the third sealing ring groove 24 and clamped between the upper part of the outer wall of the air chamber isolation cover 3 and the upper part of the inner wall of the outer support 1; a second retaining spring mounting groove 28 is provided on the inner wall of the inner support 2, and a second retaining spring 29 is installed in the second retaining spring mounting groove 28, the bottom of the solenoid valve 4 is sleeved in the second retaining spring 29, and a second gasket 30 is clamped between the top of the second retaining spring 29 and the solenoid valve 4.

[0035] like Figure 4 The fourth embodiment shown is a multi-chamber air spring support assembly, including a trumpet-shaped outer support 1, a trumpet-shaped air chamber isolation cover 3, and a solenoid valve 4. A trumpet-shaped inner support 2 is provided on the inner side of the bottom of the outer support 1. The inner support 2 and the outer support 1 are made integrally. A plurality of ribs 10 arranged in a circular array are fixedly connected between the inner wall of the outer support 1 and the outer wall of the inner support 2.

[0036] The upper part of the outer wall of the air chamber isolation cover 3 is detachably connected to the upper part of the inner wall of the outer support 1, the bottom of the solenoid valve 4 is installed on the inner support 2, and a first sealing ring 5 is installed on the outer wall of the lower part of the solenoid valve 4, which is clamped between the solenoid valve 4 and the inner support 2. The top of the solenoid valve 4 is inserted into the socket 6 at the bottom of the air chamber isolation cover 3, and the outer support 1, inner support 2, air chamber isolation cover 3, and solenoid valve 4 are coaxial.

[0037] The top of the solenoid valve 4 and the inner wall of the air chamber isolation cover 3 form a first chamber 7, and the solenoid valve 4 and the outer wall of the air chamber isolation cover 3, the inner wall of the outer support 1, and the outer wall of the inner support 2 form a second chamber 8. An air nozzle 9 connected to the second chamber 8 is installed on one side of the lower part of the outer support 1.

[0038] A third retaining spring mounting groove 31 is provided on the upper part of the inner wall of the outer support 1, and a third retaining spring 32 is installed in the third retaining spring mounting groove 31, and the bottom end of the third retaining spring 32 abuts against the top end of the air chamber isolation cover 3; a fourth sealing ring groove 33 is provided on the upper part of the outer wall of the air chamber isolation cover 3, and a fifth sealing ring 34 is installed in the fourth sealing ring groove 33, which is clamped between the upper part of the outer wall of the air chamber isolation cover 3 and the upper part of the inner wall of the outer support 1; a fifth internal thread 35 is provided on the inner wall of the inner support 2, and a second external thread ring 36 is screwed into the fifth internal thread 35, and the bottom of the solenoid valve 4 is sleeved in the second external thread ring 36.

[0039] like Figure 5 The fifth embodiment shown is a multi-chamber air spring support assembly, including a trumpet-shaped outer support 1, a trumpet-shaped air chamber isolation cover 3, and a solenoid valve 4. A trumpet-shaped inner support 2 is provided on the inner side of the bottom of the outer support 1. The inner support 2 and the outer support 1 are made integrally. A plurality of ribs 10 arranged in a circular array are fixedly connected between the inner wall of the outer support 1 and the outer wall of the inner support 2.

[0040] The upper part of the outer wall of the air chamber isolation cover 3 is detachably connected to the upper part of the inner wall of the outer support 1, the bottom of the solenoid valve 4 is installed on the inner support 2, and a first sealing ring 5 is installed on the outer wall of the lower part of the solenoid valve 4, which is clamped between the solenoid valve 4 and the inner support 2. The top of the solenoid valve 4 is inserted into the socket 6 at the bottom of the air chamber isolation cover 3, and the outer support 1, inner support 2, air chamber isolation cover 3, and solenoid valve 4 are coaxial.

[0041] The top of the solenoid valve 4 and the inner wall of the air chamber isolation cover 3 form a first chamber 7, and the solenoid valve 4 and the outer wall of the air chamber isolation cover 3, the inner wall of the outer support 1, and the outer wall of the inner support 2 form a second chamber 8. An air nozzle 9 connected to the second chamber 8 is installed on one side of the lower part of the outer support 1.

[0042] A fifth sealing ring groove 37 and a sixth external thread 38 are provided on the upper part of the outer wall of the air chamber isolation cover 3, and the fifth sealing ring groove 37 is located above the sixth external thread 38, and a sixth internal thread 39 is provided on the upper part of the inner wall of the outer support 1, and the sixth internal thread 39 is screwed into the sixth external thread 38; a sixth sealing ring 40 is installed in the fifth sealing ring groove 37 and is clamped between the upper part of the outer wall of the air chamber isolation cover 3 and the upper part of the inner wall of the outer support 1; a circle of inwardly protruding support ring 41 is provided on the inner wall of the inner support 2, the bottom of the solenoid valve 4 is sleeved in the support ring 41, and the solenoid valve 4 is clamped between the support ring 41 and the air chamber isolation cover 3.

[0043] The model of the solenoid valve used in the above five embodiments is RAPA-LV15.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A multi-chamber air spring support assembly, characterized in that: It includes a trumpet-shaped outer support, a trumpet-shaped air chamber isolation cover, and a solenoid valve. A trumpet-shaped inner support is provided on the inner side of the bottom of the outer support. The upper part of the outer wall of the air chamber isolation cover is detachably connected to the upper part of the inner wall of the outer support. The bottom of the solenoid valve is installed on the inner support, and a first sealing ring clamped between the solenoid valve and the inner support is installed on the outer wall of the lower part of the solenoid valve. The top of the solenoid valve is inserted into the socket slot at the bottom of the air chamber isolation cover; the top of the solenoid valve and the inner wall of the air chamber isolation cover enclose a first chamber, and the solenoid valve, the outer wall of the air chamber isolation cover, the inner wall of the outer support, and the outer wall of the inner support enclose a second chamber, and a gas nozzle connected to the second chamber is installed on one side of the lower part of the outer support.

2. The multi-chamber air spring support assembly according to claim 1, characterized in that: The outer support, the inner support, the air chamber isolation cover and the electromagnetic valve are coaxial.

3. The multi-chamber air spring support assembly according to claim 1, characterized in that: A plurality of ribs arranged in a circular array are fixedly connected between the inner side wall of the outer support and the outer side wall of the inner support.

4. The multi-chamber air spring support assembly according to claim 1, characterized in that: The inner support and the outer support are made in one piece.

5. The multi-chamber air spring support assembly according to claim 1, characterized in that: A first sealing ring groove and a first external thread are provided on the upper portion of the outer wall of the air chamber isolation cover, and the first sealing ring groove is located above the first external thread, and a first internal thread is provided on the upper portion of the inner wall of the outer support, and the first internal thread is screwed into the first external thread; a second sealing ring is installed in the first sealing ring groove and clamped between the upper portion of the outer wall of the air chamber isolation cover and the upper portion of the inner wall of the outer support; a first retaining spring mounting groove is provided on the inner wall of the inner support, and a first retaining spring is installed in the first retaining spring mounting groove, the bottom of the solenoid valve is sleeved in the first retaining spring, and a first gasket is clamped between the top of the first retaining spring and the solenoid valve.

6. The multi-chamber air spring support assembly according to claim 1, characterized in that: A second sealing ring groove and a second external thread are provided on the upper part of the outer wall of the air chamber isolation cover, and the second sealing ring groove is located above the second external thread, and a second internal thread is provided on the upper part of the inner wall of the outer support, and the second internal thread is screwed into the second external thread; a third sealing ring is installed in the second sealing ring groove and is clamped between the upper part of the outer wall of the air chamber isolation cover and the upper part of the inner wall of the outer support; a third internal thread is provided on the inner wall of the inner support, and a first external thread ring is screwed into the third internal thread, and the bottom of the solenoid valve is sleeved in the first external thread ring.

7. The multi-chamber air spring support assembly according to claim 1, characterized in that: A third sealing ring groove and a fourth external thread are provided on the upper portion of the outer wall of the air chamber isolation cover, and the third sealing ring groove is located below the fourth external thread, and a fourth internal thread is provided on the upper portion of the inner wall of the outer support, and the fourth internal thread is screwed into the fourth external thread; a fourth sealing ring is installed in the third sealing ring groove and is clamped between the upper portion of the outer wall of the air chamber isolation cover and the upper portion of the inner wall of the outer support; a second retaining spring mounting groove is provided on the inner wall of the inner support, and a second retaining spring is installed in the second retaining spring mounting groove, the bottom of the solenoid valve is sleeved in the second retaining spring, and a second gasket is clamped between the top of the second retaining spring and the solenoid valve.

8. The multi-chamber air spring support assembly according to claim 1, characterized in that: A third retaining ring installation groove is provided on the upper part of the inner wall of the outer support, and a third retaining ring is installed in the third retaining ring installation groove, and the bottom end of the third retaining ring abuts against the top end of the air chamber isolation cover; a fourth sealing ring groove is provided on the upper part of the outer wall of the air chamber isolation cover, and a fifth sealing ring is installed in the fourth sealing ring groove, which is clamped between the upper part of the outer wall of the air chamber isolation cover and the upper part of the inner wall of the outer support; a fifth internal thread is provided on the inner wall of the inner support, and a second external thread ring is screwed into the fifth internal thread, and the bottom of the solenoid valve is sleeved in the second external thread ring.

9. The multi-chamber air spring support assembly according to claim 1, characterized in that: A fifth sealing ring groove and a sixth external thread are provided on the upper portion of the outer wall of the air chamber isolation cover, and the fifth sealing ring groove is located above the sixth external thread, and a sixth internal thread is provided on the upper portion of the inner wall of the outer support, and the sixth internal thread is screwed into the sixth external thread; a sixth sealing ring is installed in the fifth sealing ring groove and is clamped between the upper portion of the outer wall of the air chamber isolation cover and the upper portion of the inner wall of the outer support; a circle of inwardly protruding support ring is provided on the inner wall of the inner support, the bottom of the solenoid valve is sleeved in the support ring, and the solenoid valve is clamped between the support ring and the air chamber isolation cover.

Images