Air pump piston sealing assembly and sealing method thereof

Abstract

The invention relates to the technical field of automobile accessories, in particular to an air pump piston sealing assembly and a sealing method thereof.The air pump piston sealing assembly comprises a piston frame, and a cam seat, a first piston seat and a second piston seat are arranged on the piston frame; a communicating pipe penetrating through the first piston seat and the second piston seat is arranged on the piston frame; an extending pipe communicated with the communicating pipe is arranged on the outer end face of the first piston seat in an extending mode, a mounting disc is fixed to one side of the outer end face of the first piston seat, and a sealing sleeve is slidably arranged between the first piston seat and the mounting disc; the sealing method comprises the steps of primary air inlet and secondary air compression. And primary air compression and secondary air intake are performed. According to the air pump piston sealing assembly and the sealing method thereof, the service life is long; mechanical strength is high, and damage is not prone to occurring.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, specifically to an air pump piston sealing assembly and its sealing method. Background Technology

[0002] With the development of the automotive industry, the buffer components of vehicle suspension systems have changed from spring / hydraulic to electromagnetic and air types.

[0003] An air suspension system is a type of automotive suspension system that differs from traditional spring suspension systems. Air suspension systems use air springs to support the vehicle body and adjust the air pressure and vehicle height through electrical or mechanical means to achieve better suspension comfort, stability, and transmission performance.

[0004] In an air suspension system, the air pump compresses air using mechanical energy to achieve the required pressure; therefore, the air pump is a crucial core component in an air suspension system that produces compressed air.

[0005] Based on their working principle, air pumps are classified into: positive displacement pumps, which draw in and compress gas by changing the volume of the working chamber, and common types include piston, diaphragm, screw, vane, and scroll pumps; and dynamic pumps, which transfer kinetic energy to the gas through a high-speed rotating impeller, and then convert the velocity energy into pressure energy in the diffuser, and common types include centrifugal and axial flow pumps.

[0006] Currently, automotive air pumps use a dual-chamber piston structure. Patent CN220815928U discloses a highly sealed secondary compression piston assembly and air pump, which achieves one-way sealing by sealing the air holes with a thin plate.

[0007] However, the patent still has the following shortcomings:

[0008] 1. High-temperature working conditions shorten the service life of thin plates;

[0009] 2. Due to limitations in the yield strength and fatigue strength of metals, prolonged operation can lead to reduced sealing performance, and in severe cases, even damage, causing the air pump to malfunction. Summary of the Invention

[0010] To address the technical problems existing in the background art, the present invention provides an air pump piston sealing assembly and its sealing method, which has a long service life, high mechanical strength, and is not easily damaged.

[0011] The technical solution adopted by this invention is:

[0012] An air pump piston sealing assembly includes: a piston frame, a cam seat in the middle of the piston frame, a first piston seat and a second piston seat at both ends of the piston frame, a second piston ring groove and a second sealing ring groove on the outer wall of the second piston seat; a connecting pipe through the first piston seat and the second piston seat on the piston frame; an extension pipe connected to the connecting pipe extending from the outer end face of the first piston seat; a mounting plate fixedly mounted on one side of the outer end face of the first piston seat; and a sealing sleeve slidably mounted between the first piston seat and the mounting plate.

[0013] When the first piston seat compresses air once, the sealing sleeve is sealed to the first piston seat, and the compressed air is delivered to the chamber outside the second piston seat through the extension pipe and the connecting pipe. When the first piston seat inlets air once, the sealing sleeve is sealed to the mounting plate, and air is drawn to the chamber outside the first piston seat. At the same time, the second piston seat compresses air a second time.

[0014] Furthermore, an air inlet and a set of screw holes are provided through the first piston seat. The air inlet is located in the center of the first piston seat, and the set of screw holes is arranged in a circular array. A first receiving groove is provided on the outer end face of the first piston seat.

[0015] Furthermore, one end of the extension tube is connected to the connecting tube, and the other end is closed. A primary gas inlet is connected to the tube wall at the closed end of the extension tube.

[0016] Furthermore, the mounting plate is provided with through holes and perforation groups. The through holes are located in the center of the mounting plate and are coaxial with the air inlet. The perforation groups are arranged in a circular array and are coaxial with the screw hole groups respectively. A second receiving groove is provided on the end face of the mounting plate facing the first piston seat. The second receiving groove is coaxial with the extension tube.

[0017] Furthermore, a bolt group is inserted inside the perforated group, and the bolt group is screwed to the bolt hole group. A sliding sleeve group is provided outside the bolt group, and the two ends of the sliding sleeve group abut against the first piston seat and the mounting plate, respectively.

[0018] Furthermore, the second piston seat has a primary air outlet in the center that is connected to the connecting pipe.

[0019] Furthermore, the sealing sleeve is provided with a sliding hole group, an air inlet hole, and an insertion hole. The sliding hole group is arranged in a circular array and is slidably arranged coaxially with the sliding sleeve tube group. The air inlet hole is slidably arranged coaxially with the first receiving groove, and the insertion hole is slidably arranged coaxially with the extension tube.

[0020] The sealing sleeve has a third groove and a fourth groove on the end face facing the first piston seat. The third groove is coaxial with the insertion hole, and the fourth groove is coaxial with the air inlet.

[0021] Furthermore, the outer diameter of the sealing sleeve is larger than the outer diameter of the first piston seat and the mounting plate, and the outer wall of the sealing sleeve is provided with a first piston ring groove and a first sealing ring groove.

[0022] Furthermore, the first, second, and fourth troughs are each configured as frustums with a bottom outer diameter larger than the opening outer diameter, and are each fitted with a sealing gasket.

[0023] The third receiving groove is configured with multiple annular grooves and is equipped with a sealing ring.

[0024] A sealing method for an air pump piston sealing assembly, comprising:

[0025] A. Primary air intake, secondary air compression:

[0026] The piston holder moves along the direction from the first piston seat to the second piston seat, and the sealing sleeve moves along the extension tube and the sliding sleeve assembly, and seals against the mounting plate.

[0027] As the space of the primary compression chamber increases, air enters the primary compression chamber sequentially through the air inlet and air through-hole.

[0028] The space of the secondary compression chamber is reduced, and the primary compressed gas in the secondary compression chamber undergoes secondary compression.

[0029] B. Primary air compression, secondary air intake:

[0030] The piston holder moves along the direction from the second piston seat to the first piston seat, and the sealing sleeve moves along the extension tube and the sliding sleeve assembly, and seals against the first piston seat.

[0031] The space of the primary compression chamber decreases, and the air in the primary compression chamber is compressed once.

[0032] The space of the secondary compression chamber is increased, and the primary compressed gas in the primary compression chamber enters the secondary compression chamber in sequence through the primary gas inlet, extension pipe, connecting pipe, and primary gas outlet.

[0033] The beneficial effects of the air pump piston sealing assembly and sealing method of the present invention are as follows:

[0034] 1. Through the reciprocating motion of the piston, the friction between the sealing sleeve and the inner wall of the first compression chamber, and the pressure within the compression chamber itself, the sealing sleeve abuts against and seals the first piston seat and the mounting plate respectively, thereby realizing the air intake and air compression processes.

[0035] 2. The overall structure of the sealing sleeve is not easily deformed even under high-temperature conditions, allowing it to work continuously under high-temperature conditions and maintain its sealing performance. Attached Figure Description

[0036] Figure 1 This is a general perspective view of an embodiment of the present invention;

[0037] Figure 2 This is a three-dimensional schematic diagram of a piston according to an example of the present invention. Figure 1 .

[0038] Figure 3 This is a three-dimensional schematic diagram of a piston according to an example of the present invention. Figure 2 ;

[0039] Figure 4 This is a schematic diagram of the piston and mounting plate assembly in an example of the present invention;

[0040] Figure 5 This is a three-dimensional schematic diagram of the installation disk of an embodiment of the present invention;

[0041] Figure 6 This is a three-dimensional schematic diagram of the sealing sleeve of an embodiment of the present invention. Figure 1 ;

[0042] Figure 7 This is a three-dimensional schematic diagram of the sealing sleeve of an embodiment of the present invention. Figure 2 .

[0043] In the picture:

[0044] 10. Piston holder; 11. Cam seat; 12. First piston seat; 13. Mounting plate; 14. Second piston seat; 15. Connecting pipe; 16. Sliding sleeve assembly; 17. Bolt assembly.

[0045] 121. Air inlet; 122. Extension pipe; 123. Primary air inlet; 124. Screw hole assembly; 125. First receiving groove.

[0046] 131. Through hole; 132. Perforation group; 133. Second receiving groove.

[0047] 141. Primary exhaust port; 142. Second piston ring groove; 143. Second sealing ring groove.

[0048] 20. Sealing sleeve; 21. First piston ring groove; 22. First sealing ring groove; 23. Sliding hole assembly; 24. Air inlet hole; 25. Insertion hole; 26. Third receiving groove; 27. Fourth receiving groove. Detailed Implementation

[0049] To more clearly and explicitly illustrate the specific objectives and implementation methods of this invention, a complete description of the technical solution of this invention will be provided below. The described embodiments are only a part of the embodiments of this invention, not all of them. Without creative effort, all other embodiments based on the embodiments described in this invention are within the protection scope of this invention.

[0050] This invention provides an air pump piston sealing assembly, such as... Figure 1 As shown, it includes:

[0051] Piston, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, it includes:

[0052] The piston frame 10 has a cam seat 11 in the middle and a first piston seat 12 and a second piston seat 14 at both ends. The outer diameter of the first piston seat 12 is larger than the outer diameter of the second piston seat 14. A connecting pipe 15 is provided on the piston frame 10.

[0053] like Figure 2 As shown, an air inlet 121 and a screw hole group 124 are provided through the first piston seat 12. The air inlet 121 is located in the center of the first piston seat 12. The screw hole group 124 is arranged in a circular array. An extension tube 122 is provided extending from the outer end face of the first piston seat 12. One end of the extension tube 122 is connected to the connecting tube 15, and the other end is closed. A primary air inlet 123 is provided on the wall of the closed end of the extension tube 122. The opening of the primary air inlet 123 is oriented towards the axis of the first piston seat 12. A first receiving groove 125 is provided on the outer end face of the first piston seat 12. Two first receiving grooves 125 are arranged side by side.

[0054] like Figure 4 , Figure 5 As shown, a mounting plate 13 is fixedly installed on one side of the outer end face of the first piston seat 12. A through hole 131 and a perforation group 132 are provided through the mounting plate 13. The through hole 131 is located in the center of the mounting plate 13 and is coaxially arranged with the air inlet 121. The diameter of the through hole 131 is larger than the diameter of the air inlet 121. The perforation group 132 is arranged in a circular array and is coaxially arranged with the screw hole group 124. A second receiving groove 133 is provided on the end face of the mounting plate 13 facing the first piston seat 12. The second receiving groove 133 is coaxially arranged with the extension tube 122.

[0055] like Figure 1 , Figure 2 , Figure 3 As shown, a primary air outlet 141 is provided in the center of the second piston seat 14, and the primary air outlet 141 is connected to the connecting pipe 15. A second piston ring groove 142 and a second sealing ring groove 143 are provided on the outer wall of the second piston seat 14.

[0056] like Figure 4As shown, a bolt group 17 is inserted inside the perforated group 132. The bolt group 17 is screwed to the screw hole group 124. A sliding sleeve group 16 parallel to the extension tube 122 is sleeved on the bolt group 17. A slot is provided at the edge of the screw hole group 124 on the side of the mounting plate 13 and at the edge of the perforated group 132 on the side of the first piston seat 12. The two ends of the sliding sleeve group 16 are respectively inserted into the slots at the perforated group 132 and the screw hole group 124, and abut against the first piston seat 12 and the mounting plate 13 respectively.

[0057] like Figure 1 , Figure 6 , Figure 7 As shown, a sealing sleeve 20 is slidably disposed on the sliding sleeve assembly 16. The outer diameter of the sealing sleeve 20 is larger than the outer diameter of the first piston seat 12 and the mounting plate 13. A first piston ring groove 21 and a first sealing ring groove 22 are provided on the outer wall of the sealing sleeve 20. A sliding hole assembly 23, an air inlet hole 24, and an insertion hole 25 are provided through the sealing sleeve 20. The sliding hole assembly 23 is arranged in a circular array and is slidably disposed coaxially with the sliding sleeve assembly 16. Two air inlet holes 24 are arranged side by side and are coaxially disposed with two first receiving grooves 125 respectively to balance the air intake. The insertion hole 25 is slidably disposed coaxially with the extension tube 122. A third receiving groove 26 and a fourth receiving groove 27 are provided on the end face of the sealing sleeve 20 facing the first piston seat 12. The third receiving groove 26 is coaxially disposed with the insertion hole 25, and the fourth receiving groove 27 is coaxially disposed with the air inlet hole 121.

[0058] The first groove 125, the second groove 133, and the fourth groove 27 are each configured as a frustum with a bottom outer diameter larger than the opening outer diameter, and are each equipped with a sealing gasket; the third groove 26 is configured as a multi-ring groove and is equipped with a lip-shaped sealing ring.

[0059] Based on the specific structure of an air pump piston sealing assembly in the above embodiments, the sealing method of an air pump piston sealing assembly will be further described below:

[0060] The cam at the drive motor shaft is driven by the cam seat 11 to drive the piston frame 10 to reciprocate, so that the first piston seat 12 and the second piston seat 14 reciprocate in the primary compression chamber and the secondary compression chamber at both ends of the air pump body, respectively.

[0061] A. Primary air intake, secondary air compression:

[0062] The piston holder 10 moves along the direction from the first piston seat 12 to the second piston seat 14. The sealing sleeve 20 moves along the extension tube 122 and the sliding sleeve assembly 16 until it abuts against the mounting plate 13. The end face of the sealing sleeve 20 at the edge of the insertion hole 25 presses against the sealing gasket in the second accommodating groove 133 and seals it. The insertion hole 25 blocks and seals the primary air inlet 123 of the extension tube 122. The extension tube 122 in the insertion hole 25 is sealed by the sealing ring of the third accommodating groove 26.

[0063] As the space of the primary compression chamber increases, air enters the primary compression chamber sequentially through the air inlet 121 and the air inlet 24.

[0064] The space of the secondary compression chamber is reduced, and the primary compressed air in the secondary compression chamber is compressed a second time before being discharged through the one-way valve at the air pump exhaust port.

[0065] B. Primary air compression, secondary air intake:

[0066] The piston holder 10 moves along the direction from the second piston seat 14 to the first piston seat 12. The sealing sleeve 20 moves along the extension tube 122 and the sliding sleeve assembly 16 until it abuts against the first piston seat 12, so that the end face of the sealing sleeve 20 at the edge of the air inlet 24 presses against the sealing gasket in the first accommodating groove 125 and seals it. The sealing gasket in the fourth accommodating groove 27 presses against and seals the air inlet 121. The extension tube 122 in the insertion hole 25 is sealed by the sealing ring of the third accommodating groove 26.

[0067] The space of the primary compression chamber decreases, and the air in the primary compression chamber is compressed once.

[0068] The space of the secondary compression chamber is increased, and the primary compressed gas in the primary compression chamber enters the secondary compression chamber sequentially through the primary gas inlet 123, extension pipe 122, connecting pipe 15, and primary gas outlet 141.

[0069] In summary, the above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. Based on the above description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of the present invention is not limited to the contents of the specification; all equivalent variations and modifications of the shape, structure, features, and spirit described within the scope of the claims should be included within the scope of the claims.

Claims

1. An air pump piston sealing assembly, the piston comprising: A piston holder (10) is provided with a cam seat (11) in the middle of the piston holder (10), and a first piston seat (12) and a second piston seat (14) are respectively provided at both ends of the piston holder (10). A second piston ring groove (142) and a second sealing ring groove (143) are provided on the outer wall of the second piston seat (14). The feature is that: A connecting pipe (15) is provided on the piston holder (10) through the first piston seat (12) and the second piston seat (14); An extension tube (122) connected to the connecting tube (15) is provided on the outer end face of the first piston seat (12). An installation plate (13) is fixedly provided on one side of the outer end face of the first piston seat (12). A sealing sleeve (20) is slidably provided between the first piston seat (12) and the installation plate (13). When the first piston seat (12) is compressed once, the sealing sleeve (20) is sealed to the first piston seat (12), and the compressed air is delivered from the extension pipe (122) and the connecting pipe (15) to the chamber outside the second piston seat (14). When the first piston seat (12) is inlet air for the first time, the sealing sleeve (20) is sealed to the mounting plate (13), and the air is drawn to the chamber outside the first piston seat (12). At the same time, the second piston seat (14) is inlet air for the second time.

2. The air pump piston sealing assembly according to claim 1, characterized in that: An air inlet (121) and a screw hole group (124) are provided through the first piston seat (12). The air inlet (121) is located in the center of the first piston seat (12). The screw hole group (124) is arranged in a circular array. A first receiving groove (125) is provided on the outer end face of the first piston seat (12).

3. An air pump piston sealing assembly according to claim 1 or 2, characterized in that: One end of the extension tube (122) is connected to the connecting tube (15), and the other end is closed. A primary gas inlet (123) is connected to the tube wall of the closed end of the extension tube (122).

4. An air pump piston sealing assembly according to claim 3, characterized in that: The mounting plate (13) is provided with a through hole (131) and a perforation group (132). The through hole (131) is located in the center of the mounting plate (13) and is coaxial with the air inlet (121). The perforation group (132) is arranged in a circular array and is coaxial with the screw hole group (124). A second receiving groove (133) is provided on the end face of the mounting plate (13) facing the first piston seat (12). The second receiving groove (133) is coaxial with the extension tube (122).

5. An air pump piston sealing assembly according to claim 4, characterized in that: The perforated assembly (132) is fitted with a bolt assembly (17), which is screwed to the bolt hole assembly (124). The bolt assembly (17) is fitted with a sliding sleeve assembly (16), and the two ends of the sliding sleeve assembly (16) abut against the first piston seat (12) and the mounting plate (13), respectively.

6. An air pump piston sealing assembly according to claim 5, characterized in that: The second piston seat (14) has a primary air outlet (141) in the center that is connected to the connecting pipe (15).

7. An air pump piston sealing assembly according to claim 6, characterized in that: The sealing sleeve (20) is provided with a sliding hole group (23), an air inlet hole (24), and an insertion hole (25). The sliding hole group (23) is arranged in a circular array and is slidably arranged coaxially with the sliding sleeve tube group (16). The air inlet hole (24) is slidably arranged coaxially with the first receiving groove (125). The insertion hole (25) is slidably arranged coaxially with the extension tube (122). The sealing sleeve (20) has a third groove (26) and a fourth groove (27) on the end face facing the first piston seat (12). The third groove (26) is coaxially arranged with the insertion hole (25), and the fourth groove (27) is coaxially arranged with the air inlet (121).

8. An air pump piston sealing assembly according to claim 7, characterized in that: The outer diameter of the sealing sleeve (20) is larger than the outer diameter of the first piston seat (12) and the mounting plate (13). The outer wall of the sealing sleeve (20) is provided with a first piston ring groove (21) and a first sealing ring groove (22).

9. An air pump piston sealing assembly according to claim 8, characterized in that: The first trough (125), the second trough (133), and the fourth trough (27) are respectively configured as frustum-shaped with the bottom outer diameter larger than the opening outer diameter, and are respectively fitted with sealing gaskets; The third communal groove (26) is configured with multiple annular grooves and is equipped with a sealing ring.

10. A sealing method for an air pump piston sealing assembly, as described in claim 9, characterized in that: A. Primary air intake, secondary air compression: The piston holder (10) moves along the direction from the first piston seat (12) to the second piston seat (14), and the sealing sleeve (20) moves along the extension tube (122) and the sliding sleeve tube assembly (16) and seals against the mounting plate (13); As the space of the primary compression chamber increases, air enters the primary compression chamber sequentially through the air inlet (121) and the air inlet passage (24); The space of the secondary compression chamber is reduced, and the primary compressed gas in the secondary compression chamber undergoes secondary compression; B. Primary air compression, secondary air intake: The piston holder (10) moves along the direction from the second piston seat (14) to the first piston seat (12), and the sealing sleeve (20) moves along the extension tube (122) and the sliding sleeve assembly (16) and seals against the first piston seat (12). The space of the primary compression chamber decreases, and the air in the primary compression chamber is compressed once. The space of the secondary compression chamber is increased, and the primary compressed gas in the primary compression chamber enters the secondary compression chamber in sequence through the primary gas inlet (123), extension pipe (122), connecting pipe (15), and primary gas outlet (141).

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