Nylon welding piston

Abstract

The utility model provides a nylon welding piston which comprises an upper shell and a lower shell, a lower supporting plate is arranged in the lower shell, an upper supporting plate, an upper additional air chamber and a damping hole are arranged in the upper shell, the upper additional air chamber is communicated through a first air circulation hole, an upper space ring and a lower space ring are matched to form a dynamic air flow system, the damping effect is enhanced, and the inherent frequency of the system is reduced. The upper supporting plate and the lower supporting plate are arranged in the radial direction and form a gap, and the gas flowing path is further optimized. The upper space ring and the lower space ring are connected through the inserting grooves and the inserting blocks, the upper shell and the lower shell are fixed through welding, and the sealing performance is ensured. The lower supporting plate and the upper supporting plate are arc-shaped, the internal air volume is increased, and the rigidity of the air bag assembly is reduced. The upper shell is provided with a connecting flange and a mousing-hook to prevent the air bag from falling off; a limiting bump is arranged on the upper end surface and is used for stopping and limiting; grooves are formed in the lower end face of the lower shell, reinforcing ribs are formed, and the structural strength is enhanced. Stress is effectively dispersed, the damping effect is improved, and reliability is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a nylon welded piston. BACKGROUND

[0002] Air spring is the key component of air suspension of automobile, compared with ordinary suspension, it can prolong the service life of vehicle, improve comfort, reduce wheel dynamic load and road damage, reduce maintenance cost, and can adjust the body height of special vehicle according to demand. Air spring mainly comprises air bag, upper cover assembly connected with upper air bag, and piston connected with lower air bag, wherein the piston ensures that the gas in the air spring does not leak through its sealing structure, and maintains the stability of internal air pressure.

[0003] The Italian patent with publication number "EP4180246B1" discloses a rolling piston of air spring system, which mainly comprises upper cylinder part and lower cylinder part, the upper cylinder part is mainly composed of cover plate, and the lower cylinder part is mainly composed of cylinder base, top cover, cylinder wall and support element, and the connection relationship between the parts can be clearly seen according to the attached drawings of the disclosure document. Figure 2 The connection relationship between the parts can be clearly seen.

[0004] The rolling piston has the following technical defects:

[0005] Firstly, the support element (corresponding to reference numeral 14) is only arranged on the cylinder base, and no support element is arranged at the cover plate, so that stress concentration problem is prone to occur, especially when high pressure is borne, the cover plate is prone to deformation or direct damage risk.

[0006] Secondly, the rolling piston only plays a basic anti-leakage function in the air spring, and does not have any "damping" effect. CONTENT OF THE UTILITY MODEL

[0007] The technical problem to be solved by the utility model is to solve the defects of the prior art, provide a nylon welded piston to disperse stress, improve damping effect, reduce system inherent frequency and enhance reliability.

[0008] In order to achieve the above purpose, the utility model provides the following technical scheme: a nylon welded piston, comprising upper shell and lower shell which are oppositely distributed and fixedly connected with each other, the lower shell is uniformly distributed with a plurality of groups of lower support plates which are spaced from each other, characterized in that: the upper shell is uniformly distributed with a plurality of groups of upper support plates which are spaced from each other.

[0009] By arranging the support plates in the upper shell and the lower shell, the stress is effectively dispersed, and the risk of cover plate deformation or damage is reduced.

[0010] The nylon welded piston can be further provided as follows: the upper shell is internally provided with a plurality of groups of upper additional air chambers, and each adjacent two groups of upper additional air chambers are provided with a group of upper partition rings, the diameters of the plurality of groups of upper partition rings increase in sequence along the radial direction of the upper shell, the upper support plate is arranged along the radial direction of the upper shell and sequentially connects the inner circumferential surfaces of the plurality of groups of upper partition rings and the upper shell, the end of the upper shell away from the lower shell is provided with a damping hole, the damping hole is in communication with a group of upper additional air chambers, and the upper partition ring penetrates the first gas flow hole.

[0011] By adopting the technical scheme, the plurality of groups of upper additional air chambers are arranged, the gas flow between different upper additional air chambers increases the compression and expansion times of the gas, and thus the damping effect is improved. Meanwhile, the upper additional air chambers increase the equivalent volume of the air spring, reduce the natural frequency of the system, and further improve the comfort. The damping hole is not only a throttling channel for the gas flow, but also a channel for connecting the main air chamber (air bag) and the upper additional air chamber. A smaller hole diameter increases the gas flow resistance, and thus improves the damping effect. The first gas flow hole is used for connecting adjacent upper additional air chambers, and the throttling effect of the flow hole further optimizes the damping effect.

[0012] The nylon welded piston can be further provided as follows: the lower shell is internally provided with a group of lower additional air chambers corresponding to each group of upper additional air chambers, each adjacent two groups of lower additional air chambers are provided with a lower partition ring corresponding to the upper partition ring, the first gas flow hole extends to the lower partition ring, and each adjacent two groups of lower additional air chambers are in communication through the first gas flow hole. The lower support plate is arranged along the radial direction of the lower shell and sequentially connects the inner circumferential surfaces of the plurality of groups of lower partition rings and the lower shell, and a gap exists between the lower support plate and the upper support plate along the axial direction of the upper shell.

[0013] By adopting the technical scheme, the first gas flow hole extends to the lower partition ring, and the first gas flow hole can directly connect each upper additional air chamber and each lower additional air chamber. The upper additional air chamber and the lower additional air chamber are in communication through the first gas flow hole, forming a dynamic gas flow system. The gas flow between different air chambers increases the compression and expansion times, and thus the damping effect is improved. The upper partition ring and the lower partition ring are arranged between the upper additional air chamber and the lower additional air chamber respectively, and are used for separating the air chambers and guiding the gas flow. The design of the partition ring ensures the stability of the gas flow path, and avoids unnecessary leakage of the gas between the air chambers. The upper support plate and the lower support plate are connected to the upper partition ring and the lower partition ring respectively, and play a structural support role. Meanwhile, a gap exists between the upper support plate and the lower support plate along the axial direction, and the gap is used for connecting the upper additional air chamber and the lower additional air chamber, forming a dynamic gas flow system.

[0014] The aforementioned nylon welded piston can be further configured such that: the end of the upper spacer ring is provided with a slot, the end of the lower spacer ring is provided with a plug that matches the slot, and the outer periphery of the upper shell and the outer periphery of the lower shell are connected by welding.

[0015] Using the above technical solution, since gas flows between each pair of adjacent upper and lower auxiliary air chambers through the first gas flow hole, the sealing performance requirements are not high. The connection requirements can be met by using a slot and plug fit between the upper and lower spacers, which is convenient and allows for rapid assembly. The outer periphery of the upper shell and the outer periphery of the lower shell are connected by welding, which not only meets the structural strength of the shell but also meets the sealing performance requirements, preventing leakage from the auxiliary air chambers.

[0016] The aforementioned nylon welded piston can be further configured such that: the lower support plate is arranged radially along the lower shell, the side of the lower support plate facing the upper shell is arc-shaped and the arc is recessed in the direction away from the upper shell, and the portion of the upper support plate located in the two adjacent sets of upper spacers is also arc-shaped and the arc is recessed in the direction away from the lower shell.

[0017] The above technical solution is adopted, and both the upper support plate and the lower support plate are designed to be curved and inwardly tapered, in order to increase the internal air volume and reduce the rigidity of the airbag assembly.

[0018] The aforementioned nylon welded piston can be further configured such that: the upper end face of the upper shell is provided with an annular connecting flange, and the upper end of the connecting flange is provided with an anti-disengagement hook.

[0019] Using the above technical solution, the nylon welded piston cooperates with the air spring's air bladder. After the air bladder is pressed in, the anti-disengagement hook can prevent the air bladder from coming out.

[0020] The aforementioned nylon welded piston can be further configured such that the upper end face of the upper shell is provided with a number of limiting protrusions located inside the connecting flange.

[0021] Using the above technical solution, a stop needs to be installed on the upper end face of the upper shell, and a limiting protrusion is designed to limit the lower outer periphery of the stop.

[0022] The aforementioned nylon welded piston can be further configured such that the lower end face of the lower shell is provided with several sets of grooves.

[0023] Using the above technical solution, after several sets of grooves are machined on the lower end face of the lower shell, they will naturally form a reinforcing rib structure, further enhancing the structural strength.

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0025] Figure 1 This is a cross-sectional schematic diagram of an embodiment of the present utility model;

[0026] Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle;

[0027] Figure 3 for Figure 1 Enlarged view of a portion of point B in the middle;

[0028] Figure 4 This is a schematic diagram of the lower structure of an embodiment of the present utility model;

[0029] Figure 5 This is a schematic diagram of the upper structure of an embodiment of the present utility model;

[0030] Figure 6 This is a schematic diagram of the upper shell of an embodiment of the present utility model;

[0031] Figure 7 This is a schematic diagram of the lower shell of an embodiment of the present utility model.

[0032] Labeling notes: Upper shell 1, Lower shell 2, Lower support plate 3, Upper support plate 4, Upper auxiliary air chamber 5, Upper spacer 6, Damping hole 7, First gas flow hole 8, Lower auxiliary air chamber 9, Lower spacer 10, Slot 11, Insert block 12, Connecting flange 13, Anti-disengagement hook 14, Limiting protrusion 15, Groove 16. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] like Figures 1 to 7 The nylon welded piston shown includes an upper shell 1 and a lower shell 2 that are distributed opposite to each other and fixedly connected. Several sets of spaced-apart lower support plates 3 are evenly distributed inside the lower shell 2, and several sets of spaced-apart upper support plates 4 are evenly distributed inside the upper shell 1. By providing support plates in both the upper shell 1 and the lower shell 2, stress is effectively distributed, reducing the risk of deformation or damage to the cover plate.

[0035] The upper shell 1 contains several sets of upper auxiliary air chambers 5. Each pair of adjacent upper auxiliary air chambers 5 is separated by an upper spacer ring 6. The inner diameter of the upper spacer rings 6 increases sequentially along the radial direction of the upper shell 1. The upper support plate 4 is arranged radially along the upper shell 1 and sequentially connects the upper spacer rings 6 and the inner circumferential surface of the upper shell 1. A damping hole 7 is provided at the end of the upper shell 1 away from the lower shell 2. The damping hole 7 communicates with one set of upper auxiliary air chambers 5. A first gas flow hole 8 passes through the upper spacer rings 6, and each pair of adjacent upper auxiliary air chambers 5 is connected through the first gas flow hole 8. By setting multiple sets of upper auxiliary air chambers 5, the flow of gas between different upper auxiliary air chambers 5 increases the number of compression and expansion cycles, thereby improving the damping effect. Simultaneously, the presence of the upper auxiliary air chambers 5 also increases the equivalent volume of the air spring, reduces the natural frequency of the system, and further enhances comfort. The damping hole 7 is not only a throttling channel for gas flow, its diameter directly affecting the magnitude of the damping force, but also a channel connecting the main air chamber (airbag) and the upper auxiliary air chambers 5. A smaller orifice diameter increases gas flow resistance, thereby improving the damping effect. The first gas flow orifice 8 is used to connect to the adjacent upper auxiliary gas chamber 5, and the damping effect is further optimized through the throttling effect of the flow orifice.

[0036] Inside the lower shell 2, a set of lower auxiliary air chambers 9 is provided corresponding to each set of upper auxiliary air chambers 5. Between each pair of adjacent sets of lower auxiliary air chambers 9, a lower partition ring 10 corresponding to the upper partition ring 6 is provided. The first gas flow hole 8 extends to the lower partition ring 10. Each pair of adjacent sets of lower auxiliary air chambers 9 is connected through the first gas flow hole 8. The lower support plate 3 is arranged radially along the lower shell 2 and sequentially connects several sets of lower partition rings 10 and the inner circumferential surface of the lower shell 2. A gap exists between the lower support plate 3 and the upper support plate 4 along the axial direction of the upper shell 1. The first gas flow hole 8 extends to the lower partition ring 10, meaning it can directly connect each upper auxiliary air chamber 5 and each lower auxiliary air chamber 9. The upper auxiliary air chambers 5 and lower auxiliary air chambers 9 are connected through the first gas flow hole 8, forming a dynamic gas flow system. The flow of gas between different air chambers increases the number of compressions and expansions, thereby improving the damping effect. Upper partition ring 6 and lower partition ring 10 are respectively disposed between upper auxiliary air chamber 5 and lower auxiliary air chamber 9 to separate the air chambers and guide gas flow. The design of the partition rings ensures the stability of the gas flow path and prevents unnecessary gas leakage between the air chambers. Upper support plate 4 and lower support plate 3 connect upper partition ring 6 and lower partition ring 10 respectively, providing structural support. At the same time, there is an axial gap between upper support plate 4 and lower support plate 3, which connects upper auxiliary air chamber 5 and lower auxiliary air chamber 9 to form a dynamic gas flow system.

[0037] The upper spacer 6 has a slot 11 at its end, and the lower spacer 10 has a plug 12 that matches the slot 11 at its end. The outer periphery of the upper shell 1 and the outer periphery of the lower shell 2 are connected by welding. Since gas flows between each pair of adjacent upper and lower auxiliary air chambers 9 through the first gas flow hole 8, the sealing performance requirement is not high. The upper spacer 6 and the lower spacer 10 can be connected by using the slot 11 and the plug 12, which is convenient and allows for quick assembly. The welding connection between the outer periphery of the upper shell 1 and the outer periphery of the lower shell 2 not only meets the structural strength requirements of the shell but also meets the sealing performance requirements, preventing leakage from the auxiliary air chambers.

[0038] The lower support plate 3 is arranged radially along the lower shell 2. The side of the lower support plate 3 facing the upper shell 1 is arc-shaped and the arc is recessed in the direction away from the upper shell 1. The upper support plate 4 located in the adjacent two sets of upper spacers 6 is also arc-shaped and the arc is recessed in the direction away from the lower shell 2. Both the upper support plate 4 and the lower support plate 3 are designed to be arc-shaped and inwardly recessed in order to increase the internal air volume and reduce the rigidity of the airbag assembly.

[0039] The upper end face of the upper shell 1 is provided with an annular connecting flange 13, and the upper end of the connecting flange 13 is provided with an anti-disengagement hook 14. The nylon welded piston cooperates with the air spring airbag. After the airbag is pressed in, the anti-disengagement hook 14 can prevent the airbag from falling out.

[0040] The upper end face of the upper shell 1 is provided with several sets of limiting protrusions 15 located inside the connecting flange 13. A stop needs to be installed at the upper end face of the upper shell 1, and the limiting protrusions 15 are designed to limit the lower outer periphery of the stop.

[0041] The lower end face of the lower shell 2 is provided with several sets of grooves 16. After the several sets of grooves 16 are machined on the lower end face of the lower shell 2, they will naturally form a reinforcing rib structure, further enhancing the structural strength.

Claims

1. A nylon welded piston comprising an upper shell and a lower shell oppositely arranged and fixedly connected to each other, the lower shell is uniformly provided with a plurality of groups of lower support plates spaced from each other, characterized in that: The upper shell is provided with a plurality of groups of upper support plates which are spaced from each other.

2. The nylon welded piston of claim 1, wherein: The upper shell is provided with a plurality of groups of upper additional air chambers, and each adjacent two groups of upper additional air chambers are provided with a group of upper partition rings. The inner diameters of the plurality of groups of upper partition rings increase in sequence along the radial direction of the upper shell. The upper support plates are arranged along the radial direction of the upper shell and sequentially connect the inner circumferential surfaces of the plurality of groups of upper partition rings and the upper shell. The end of the upper shell away from the lower shell is provided with a damping hole which is in communication with a group of upper additional air chambers. The upper partition rings are penetrated by first gas flow-through holes, and each adjacent two groups of upper additional air chambers are in communication through the first gas flow-through holes.

3. The nylon welded piston of claim 2, wherein: The lower shell is provided with a group of lower additional air chambers corresponding to each group of upper additional air chambers. Each adjacent two groups of lower additional air chambers are provided with a lower partition ring corresponding to the upper partition ring. The first gas flow-through holes extend to the lower partition rings, and each adjacent two groups of lower additional air chambers are in communication through the first gas flow-through holes. The lower support plates are arranged along the radial direction of the lower shell and sequentially connect the inner circumferential surfaces of the plurality of groups of lower partition rings and the lower shell. There is a gap between the lower support plates and the upper support plates along the axial direction of the upper shell.

4. The nylon welded piston of claim 3, wherein: The end of the upper partition ring is provided with a slot, and the end of the lower partition ring is provided with a plug which is adapted to the slot. The outer circumferences of the upper shell and the lower shell are connected by welding.

5. The nylon welded piston of any of claims 2 to 4, characterized by: The lower support plates are arranged along the radial direction of the lower shell. The side edge of the lower support plate towards the upper shell is arc-shaped and the arc-shaped direction is recessed away from the upper shell. The part of the upper support plate between the adjacent two groups of upper partition rings is also arc-shaped and the arc-shaped direction is recessed away from the lower shell.

6. The nylon welded piston of any of claims 1 to 4, characterized by: The upper end surface of the upper shell is provided with an annular connecting flange, and the upper end of the connecting flange is provided with an anti-unhooking hook.

7. The nylon welded piston of claim 6, wherein: The upper end surface of the upper shell is provided with a plurality of groups of limiting protrusions which are arranged on the inner side of the connecting flange.

8. The nylon welded piston of any of claims 1 to 4, characterized by: The lower end surface of the lower shell is provided with a plurality of groups of grooves. The lower end surface of the lower shell is provided with a plurality of groups of grooves.

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