Air bag assembly for air bag pump and air bag pump

Abstract

The utility model belongs to the technical field of air bag pumps, and particularly relates to an air bag assembly for an air bag pump and the air bag pump. The air bag assembly for the air bag pump comprises an air cylinder and an air bag arranged in the air cylinder, an air bag connecting end plate is arranged at one end of the air bag, a piston rod extending out of the air cylinder is fixed to the air bag connecting end plate, and a sealing adjusting mechanism is fixed to the outer wall of the air cylinder. The sealing adjusting mechanism comprises a hollow shell, a sealing ring abutting against a top plate and a bottom plate of the shell, a plurality of threaded rods penetrating through and in threaded connection with side plates of the shell and a plurality of clamping plates abutting against the threaded rods and the sealing ring, and the piston rod penetrates through the shell and is in sliding connection with the inner wall of the sealing ring. The sealing adjusting mechanism can fix the sealing ring, when the sealing ring is abraded, a threaded rod is adjusted to push a clamping plate, the clamping plate clamps the sealing ring to deform so as to adjust and reduce a gap, and in addition, the abrasion condition of the inner sealing ring can be observed through the number of turns of threads.

Description

Technical Field

[0001] This utility model belongs to the field of wind bag pump technology, specifically relating to a wind bag assembly for a wind bag pump and a wind bag pump. Background Technology

[0002] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and is not necessarily to be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

[0003] A pneumatic air pump is a type of pump that uses compressed air as power, with an internal pneumatic airbag reciprocating to transport liquid. The pump chamber of the pneumatic airbag is divided into two working chambers, each consisting of a gas phase working chamber and a liquid phase working chamber. After compressed air enters the gas phase working chamber, the pneumatic airbag deforms and moves. A reversing valve controls the sequential flow of compressed air into the two gas phase working chambers. The liquid phase chamber alternately draws in and discharges liquid, thus achieving liquid transport. The liquid phase chamber can be either inside the pneumatic airbag or between the pneumatic airbag and the pump body. Since the pneumatic airbag needs a connecting structure to achieve reciprocating motion, placing the liquid phase chamber inside the pneumatic airbag prevents contamination from friction debris from the connecting mechanism. In this case, the pneumatic airbag structure is designed similarly to a cylinder piston. Initially, the pneumatic airbag pump cylinder seal used a single-layer fluororubber U-shaped seal and a piston rod sealing structure. This design allowed particles from the working environment to enter the seal, and the lubricating grease in the seal would also evaporate into the working environment, leading to accelerated wear and aging of the seal.

[0004] CN206338182U discloses a sealing assembly for a wind pump cylinder. Through the design of a bearing retaining ring, sliding bearing, groove, sealing ring, collar, guide dustproof ring, and pressure cap, it can effectively prevent particles from the working environment from entering the working chamber, while also effectively reducing the volatilization of the sealing grease. However, in this patent, the sealing ring is fixed inside the cylinder wall, making it impossible to detect and repair or replace it in a timely manner when it is worn.

[0005] CN216642416U discloses a method for adjusting the pressure of a sealing ring in a wind bag pump. This method uses a compensation and adjustment clamping mechanism to apply uniform pressure towards the center of the sealing ring around its outer periphery, reducing the inner diameter of the sealing ring. This compensates for the gap caused by wear on the inner side of the sealing ring, improving the operational stability of the wind bag pump and extending the service life of the sealing ring. Furthermore, the adjustment end cap is easy to disassemble, facilitating the removal and replacement of the sealing ring and reducing maintenance difficulty. While this patent allows for the compensation and adjustment of the sealing ring, the compensation and adjustment clamping mechanism is complex, requiring multiple annular structures. The fixing and adjustment of the sealing ring necessitate separate structures, and the sealing ring needs to be machined into a special shape, increasing operating costs. Moreover, this compensation and adjustment clamping mechanism cannot visually reflect the degree of wear of the sealing ring. Utility Model Content

[0006] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide an airbag assembly for an airbag pump and an airbag pump.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0008] In a first aspect, this utility model provides an airbag assembly for an airbag pump, including a cylinder and an airbag disposed inside the cylinder. One end of the airbag is provided with an airbag connecting end plate, and a piston rod extending to the outside of the cylinder is fixed on the airbag connecting end plate. A sealing adjustment mechanism is fixed on the outer wall of the cylinder. The sealing adjustment mechanism includes a hollow shell, a sealing ring abutting against the top and bottom plates of the shell, a plurality of threaded rods penetrating and threadedly connected to the side plates of the shell, and a plurality of clamping plates abutting against the threaded rods and the sealing ring. The piston rod penetrates the shell and is slidably connected to the inner wall of the sealing ring.

[0009] In the sealing adjustment mechanism, the housing limits the axial displacement of the sealing ring along the piston rod via the top and bottom plates, and clamping plates abut against and hold the sealing ring from the side. The threaded rod abuts against and fixes the clamping plates, thus securing the sealing ring. After prolonged use, a gap develops between the inner wall of the sealing ring and the piston rod. Rotating the threaded rod moves it inwards into the housing, pushing the clamping plates towards the center of the housing. The movement of multiple clamping plates clamps the sealing ring, reducing the gap between the inner wall of the sealing ring and the piston rod until it disappears. Even if the sealing ring is not worn, the position of the threaded rod and clamping plates can be adjusted according to the damping between the sealing ring and the piston rod to control the sealing effect. Furthermore, the number of threads exposed on the outside of the housing reflects the wear condition of the sealing ring inside the housing. The number of threads required to replace the sealing ring can be determined and preset before using the sealing adjustment mechanism. When the number of exposed threads reaches the preset value, the sealing adjustment mechanism is removed from the cylinder, and the sealing ring is replaced.

[0010] Preferably, the side of the clamp that abuts against the sealing ring is arc-shaped.

[0011] The curved clamping plate and the circular sealing ring are a better match, improving the clamping effect of the clamping plate on the sealing ring.

[0012] Preferably, the threaded rod corresponds one-to-one with the clamping plate, and the corresponding threaded rod and the clamping plate have the same central axis of symmetry.

[0013] The threaded rod and the clamping plate are aligned one by one and their central axis of symmetry is set to coincide to prevent the positional misalignment between the threaded rod and the clamping plate from causing the clamping plate to shift under force, which would affect the fixing and adjustment of the sealing ring.

[0014] More preferably, the central axis of symmetry of the threaded rod coincides with the diameter of the piston rod, and the threaded rod is distributed at equal angles.

[0015] The threaded rod and clamping plate are distributed at an angle on the housing, so that the sealing ring is subjected to uniform force.

[0016] Preferably, a limiting groove is provided on the side of the clamping plate that abuts against the threaded rod, and one end of the threaded rod that abuts against the clamping plate extends into the limiting groove.

[0017] The limit groove is designed to prevent the clamping plate from shifting during use, which could cause the sealing adjustment mechanism to malfunction.

[0018] More preferably, a sliding bearing is provided in the limiting groove, and the threaded rod is slidably connected to the sliding bearing.

[0019] By using sliding bearings, the friction between the threaded rod and the clamping plate is reduced, thereby improving the adjustment efficiency.

[0020] Preferably, the threaded rod has a polygonal head on one side extending out of the housing.

[0021] The polygonal head is used to adjust the threaded rod using tools such as wrenches.

[0022] Preferably, the bottom plate and the side plate of the housing are connected by snaps or threads, and a fixing device for connecting the cylinder is provided on the bottom plate of the housing.

[0023] Preferably, a sleeve is inserted into the outer wall of the cylinder, and the piston rod is slidably connected to the inner side of the sleeve.

[0024] Secondly, this utility model provides a windbag pump, including the windbag assembly for the windbag pump as described in the first aspect.

[0025] The beneficial effects achieved by one or more technical solutions of this utility model are as follows:

[0026] A sealing adjustment mechanism is installed on the airbag assembly of the airbag pump, using a housing, clamping plate, and threaded rod to limit and fix the sealing ring. When the seal wears and the gap between it and the piston rod increases, rotating the threaded rod pushes the clamping plate towards the center, compressing the seal and reducing its inner diameter, thus adjusting the gap between the seal and the piston rod. The number of exposed threads on the threaded rod allows for a relatively direct observation of the wear condition of the internal seal. The sealing adjustment mechanism can fix and adjust the seal, improving the sealing performance and stability of the airbag assembly. Furthermore, the sealing adjustment mechanism can be quickly disassembled for easy replacement of the seal when it fails. Attached Figure Description

[0027] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0028] Figure 1 This is a cross-sectional view of the airbag assembly for the airbag pump in Examples 1 and 2;

[0029] Figure 2 This is a cross-sectional view of the sealing adjustment mechanism in the airbag assembly for the airbag pump in Example 1;

[0030] Figure 3 This is a cross-sectional view of the sealing adjustment mechanism in the airbag assembly for the airbag pump in Example 2;

[0031] Figure 4 This is a cross-sectional view of the airbag assembly for the airbag pump in Example 3;

[0032] Figure 5 This is a cross-sectional view of the sealing adjustment mechanism in the airbag assembly for the airbag pump in Example 3;

[0033] Figure 6 This is a cross-sectional view of the airbag assembly for the airbag pump in Example 4;

[0034] Figure 7 This is a cross-sectional view of the sealing adjustment mechanism in the airbag assembly for the airbag pump in Example 4;

[0035] In the diagram, 1 is the cylinder, 2 is the air bag, 3 is the air bag connecting end plate, 4 is the piston rod, 5 is the sealing adjustment mechanism, 51 is the housing, 52 is the sealing ring, 53 is the threaded rod, 54 is the clamping plate, 55 is the polygonal head, 56 is the sliding bearing, 6 is the sleeve, and 7 is the fixing device. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be described in detail below with reference to specific embodiments and comparative examples.

[0037] Example 1

[0038] like Figure 1 and Figure 2As shown, the airbag assembly for the airbag pump includes a cylinder 1 and an airbag 2 disposed inside it. An airbag connecting end plate 3 is provided at one end of the airbag 2. A piston rod 4 extending to the outside of the cylinder 1 is fixed to the airbag connecting end plate 3. A sleeve 6 is inserted into the outer wall of the cylinder 1, and the piston rod 4 is slidably connected to the inner side of the sleeve 6. A sealing adjustment mechanism 5 is fixed to the outer wall of the cylinder 1, and the sealing adjustment mechanism 5 is fixedly connected to the cylinder 1 via a fixing device 7. The sealing adjustment mechanism 5 includes a hollow housing 51, sealing rings 52 abutting against the top and bottom plates of the housing 51, four threaded rods 53 penetrating and threadedly connected to the side plates of the housing 51, and four clamping plates 54 abutting against the threaded rods 53 and the sealing rings 52. The piston rod 4 penetrates the housing 51 and is slidably connected to the inner wall of the sealing rings 52. The bottom plate and side plates of the housing 51 are connected by a snap-fit ​​(not shown). The threaded rod 53 corresponds one-to-one with the clamping plate 54. The corresponding threaded rod 53 and clamping plate 54 share the same central axis of symmetry. The central axis of symmetry of the threaded rod 53 coincides with the diameter of the piston rod 4, and the included angle between the threaded rods 53 is 90°. The side of the clamping plate 54 that abuts against the sealing ring is arc-shaped, and the diameter of the arc is equal to the outer diameter of the sealing ring 52. The side of the clamping plate 54 that abuts against the threaded rod 53 is flat and has a limiting groove. A sliding bearing 56 is installed in the limiting groove, and the end of the threaded rod 53 that abuts against the clamping plate 54 extends into the limiting groove and is slidably connected to the sliding bearing 56.

[0039] Example 2

[0040] like Figure 1 and Figure 3 As shown, the airbag assembly for the airbag pump includes a cylinder 1 and an airbag 2 disposed inside it. An airbag connecting end plate 3 is provided at one end of the airbag 2. A piston rod 4 extending to the outside of the cylinder 1 is fixed to the airbag connecting end plate 3. A sleeve 6 is inserted into the outer wall of the cylinder 1, and the piston rod 4 is slidably connected to the inner side of the sleeve 6. A sealing adjustment mechanism 5 is fixed to the outer wall of the cylinder 1, and the sealing adjustment mechanism 5 is fixedly connected to the cylinder 1 via a fixing device 7. The sealing adjustment mechanism 5 includes a hollow housing 51, sealing rings 52 abutting against the top and bottom plates of the housing 51, six threaded rods 53 penetrating and threadedly connected to the side plates of the housing 51, and six clamping plates 54 abutting against the threaded rods 53 and the sealing rings 52. The piston rod 4 penetrates the housing 51 and is slidably connected to the inner wall of the sealing rings 52. The bottom plate and side plates of the housing 51 are connected by a snap-fit ​​(not shown). The threaded rod 53 corresponds one-to-one with the clamping plate 54. The corresponding threaded rod 53 and clamping plate 54 share the same central axis of symmetry. The central axis of symmetry of the threaded rod 53 coincides with the diameter of the piston rod 4, and the included angle between the threaded rods 53 is 60°. The side of the clamping plate 54 that abuts against the sealing ring is arc-shaped, and the diameter of the arc is equal to the outer diameter of the sealing ring 52. The side of the clamping plate 54 that abuts against the threaded rod 53 is arc-shaped and has a limiting groove. A sliding bearing 56 is installed in the limiting groove, and the end of the threaded rod 53 that abuts against the clamping plate 54 extends into the limiting groove and is slidably connected to the sliding bearing 56.

[0041] Example 3

[0042] like Figure 4 and Figure 5 As shown, the airbag assembly for the airbag pump includes a cylinder 1 and an airbag 2 disposed inside it. An airbag connecting end plate 3 is provided at one end of the airbag 2. A piston rod 4 extending to the outside of the cylinder 1 is fixed to the airbag connecting end plate 3. A sleeve 6 is inserted into the outer wall of the cylinder 1, and the piston rod 4 is slidably connected to the inner side of the sleeve 6. A sealing adjustment mechanism 5 is fixed to the outer wall of the cylinder 1, and the sealing adjustment mechanism 5 is fixedly connected to the cylinder 1 via a fixing device 7. The sealing adjustment mechanism 5 includes a hollow housing 51, sealing rings 52 abutting against the top and bottom plates of the housing 51, four threaded rods 53 penetrating and threadedly connected to the side plates of the housing 51, and four clamping plates 54 abutting against the threaded rods 53 and the sealing rings 52. The piston rod 4 penetrates the housing 51 and is slidably connected to the inner wall of the sealing rings 52. The bottom plate and side plates of the housing 51 are connected by a snap-fit ​​(not shown). The threaded rod 53 corresponds one-to-one with the clamping plate 54. The corresponding threaded rod 53 and clamping plate 54 share the same central axis of symmetry. The central axis of symmetry of the threaded rod 53 coincides with the diameter of the piston rod 4, and the included angle between the threaded rods 53 is 90°. The side of the clamping plate 54 that abuts against the sealing ring is arc-shaped, and the diameter of the arc is equal to the outer diameter of the sealing ring 52. The side of the clamping plate 54 that abuts against the threaded rod 53 is flat and has a limiting groove. One end of the threaded rod 53 that abuts against the clamping plate 54 extends into the limiting groove.

[0043] Example 4

[0044] like Figure 6 and Figure 7 As shown, the airbag assembly for the airbag pump includes a cylinder 1 and an airbag 2 disposed inside it. An airbag connecting end plate 3 is provided at one end of the airbag 2, and a piston rod 4 extending to the outside of the cylinder 1 is fixed to the airbag connecting end plate 3. A sealing adjustment mechanism 5 is fixed to the outer wall of the cylinder 1, and the sealing adjustment mechanism 5 is fixedly connected to the cylinder 1 via a fixing device 7. The sealing adjustment mechanism 5 includes a hollow housing 51, sealing rings 52 abutting against the top and bottom plates of the housing 51, four threaded rods 53 penetrating and threadedly connected to the side plates of the housing 51, and four clamping plates 54 abutting against the threaded rods 53 and the sealing rings 52. The piston rod 4 penetrates the housing 51 and is slidably connected to the inner wall of the sealing rings 52. The bottom plate and side plates of the housing 51 are connected by a snap-fit ​​(not shown). The threaded rod 53 corresponds one-to-one with the clamping plate 54. The corresponding threaded rod 53 and clamping plate 54 share the same central axis of symmetry. The central axis of symmetry of the threaded rod 53 coincides with the diameter of the piston rod 4, and the included angle between the threaded rods 53 is 90°. The side of the clamping plate 54 that abuts against the sealing ring is arc-shaped, and the diameter of the arc is equal to the outer diameter of the sealing ring 52. The side of the clamping plate 54 that abuts against the threaded rod 53 is flat.

[0045] Example 5

[0046] The airbag pump, wherein the airbag assembly is the airbag assembly for the airbag pump in Example 1.

[0047] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A wind bag assembly for a wind bag pump, characterized in that, The device includes a cylinder and an air bag disposed inside the cylinder. One end of the air bag is provided with an air bag connecting end plate. A piston rod extending to the outside of the cylinder is fixed to the air bag connecting end plate. A sealing adjustment mechanism is fixed to the outer wall of the cylinder. The sealing adjustment mechanism includes a hollow shell, a sealing ring that abuts against the top and bottom plates of the shell, a plurality of threaded rods that pass through and are threadedly connected to the side plates of the shell, and a plurality of clamping plates that abut against the threaded rods and the sealing ring. The piston rod passes through the shell and is slidably connected to the inner wall of the sealing ring.

2. The airbag assembly for the airbag pump as described in claim 1, characterized in that, The side of the clamp that abuts against the sealing ring is arc-shaped.

3. The airbag assembly for the airbag pump as described in claim 1, characterized in that, The threaded rods correspond one-to-one with the clamping plates, and the corresponding threaded rods and clamping plates have the same central axis of symmetry.

4. The airbag assembly for the airbag pump as described in claim 3, characterized in that, The central axis of symmetry of the threaded rod coincides with the diameter of the piston rod, and the threaded rod is distributed at equal angles.

5. The airbag assembly for the airbag pump as described in claim 1, characterized in that, A limiting groove is provided on the side of the clamping plate that abuts against the threaded rod, and one end of the threaded rod that abuts against the clamping plate extends into the limiting groove.

6. The airbag assembly for the airbag pump as described in claim 5, characterized in that, A sliding bearing is provided in the limiting groove, and the threaded rod is slidably connected to the sliding bearing.

7. The airbag assembly for the airbag pump as described in claim 1, characterized in that, The threaded rod extends out of the housing and has a polygonal head.

8. The airbag assembly for the airbag pump as described in claim 1, characterized in that, The bottom plate and side plate of the housing are connected by snaps or threads, and a fixing device for connecting the cylinder is provided on the bottom plate of the housing.

9. The airbag assembly for the airbag pump as described in claim 1, characterized in that, A sleeve is inserted into the outer wall of the cylinder, and the piston rod is slidably connected to the inner side of the sleeve.

10. A wind-bag pump, characterized in that, Includes the airbag assembly for the airbag pump as described in any one of claims 1 to 9.

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