Wear-resistant cylinder body for air suspension movement

Abstract

This utility model relates to a wear-resistant working cylinder body for an air suspension mechanism, comprising: a cylinder body; a piston slidably embedded in the cylinder body; and an elastic sealing part disposed outside the piston, which adaptively fills the gap between the cylinder body and the piston when the piston slides. The elastic sealing part in this utility model adaptively fills the sliding gap between the piston and the cylinder body, thus avoiding piston jamming caused by interference fit and preventing oil leakage / air infiltration caused by gaps.

Description

Technical Field

[0001] This utility model belongs to the field of cylinder technology, and specifically relates to a wear-resistant working cylinder block for an air suspension mechanism. Background Technology

[0002] The air suspension mechanism is the core actuator of the vehicle suspension system. The performance of the working cylinder and piston directly determines the adjustment accuracy and reliability of the suspension. The piston needs to slide back and forth in the cylinder at a high frequency to achieve dynamic control of vehicle height and stiffness through air pressure / hydraulic transmission. The "sliding clearance" is the key contradiction between "smooth sliding" and "sealing reliability", and it is also the main technical bottleneck of traditional working cylinder design.

[0003] On the one hand, in order to ensure that the piston slides smoothly without jamming, a clearance of 0.05-0.15mm needs to be reserved. However, the clearance can easily lead to hydraulic oil leakage or air infiltration. Leakage not only reduces the output efficiency of the mechanism, but also loses its lubricating effect due to oil loss, which aggravates the direct metal-to-metal friction between the piston and the cylinder, resulting in scratches on the inner wall of the cylinder and wear on the piston surface, further expanding the clearance and forming a vicious cycle of "leakage-wear-widening clearance". On the other hand, in order to solve the leakage problem, the traditional solution uses a fixed seal with a small gap design. However, the fixed seal cannot adapt to the gap change: when the cylinder / piston expands due to working heat, long-term vibration or wear and gap fluctuations occur, the seal will either be damaged by excessive compression due to the gap being too small, or lose its sealing effect due to the gap being too large. Moreover, the small gap fit is prone to piston jamming due to oil impurities, resulting in sluggish suspension response. Utility Model Content

[0004] This utility model addresses the problems of existing technologies by providing a wear-resistant working cylinder body for an air suspension mechanism. The specific technical solution is as follows: The wear-resistant working cylinder body for the air suspension mechanism includes: Cylinder block; The piston is slidably fitted into the cylinder. An elastic seal is configured outside the piston to adaptively fill the gap between the cylinder and the piston as the piston slides.

[0005] As a further technical solution of this utility model, the elastic sealing part includes: Fan-shaped flaps are positioned between the piston and the cylinder. The elastic part is pre-compressed and positioned between the piston and the cylinder, pressing the piston to continuously adhere to the cylinder as the piston slides.

[0006] As a further technical solution of this utility model, the extension direction of the elastic part is configured to be perpendicular to the fan-shaped petals.

[0007] As a further technical solution of this utility model, the elastic part is provided in multiple sets, which are evenly distributed according to the shape of the fan-shaped petals, and the extension direction of the elastic part is perpendicular to the fan-shaped petals.

[0008] As a further technical solution of this utility model, a fan-shaped groove is formed on the piston, and the fan-shaped lobes are arranged to cover the fan-shaped groove.

[0009] As a further technical solution of this utility model, a guide and limiting groove is formed on the piston, so that the elastic part is embedded in the guide and limiting groove, thereby limiting the extension direction of the elastic part.

[0010] As a further technical solution of this utility model, a limiting movement part is provided between the fan-shaped petals and the piston to restrict their relative radial movement.

[0011] As a further technical solution of this utility model, the limiting movement part includes a slide rail formed on the piston and a slider that slides within the slide rail; The slide is configured with an opening that connects to a fan-shaped groove and the piston edge, and the slider is connected to the fan-shaped lobes, thereby restricting the movement path of the slider.

[0012] As a further technical solution of this utility model, the elastic sealing part is uniformly arranged in six groups around the circumference, and there is a gap between the fan-shaped petals in the adjacent two groups of elastic sealing parts, thereby allowing the fan-shaped petals to move radially.

[0013] As a further technical solution of this utility model, the size of the gap is configured such that an oil film is formed to seal the gap when the piston is making piston movement.

[0014] The beneficial effects of this utility model are as follows: The elastic seal adaptively fills the sliding gap between the piston and the cylinder, which not only avoids piston jamming caused by interference fit, but also prevents oil leakage / air infiltration caused by gap.

[0015] The pre-compression elastic section provides active adhesion force, unaffected by the operating pressure of the movement; six sets of seals provide full circumferential coverage and double protection from gap oil film, and the redundant design reduces the risk of local failure and extends the seal life.

[0016] The fan-shaped groove, guide and limit groove, and slide block respectively realize the positioning of the seal, the constraint of the elastic part, and the restriction of the movement path, so as to avoid the component displacement and damage; the embedded and open design simplifies installation and maintenance and reduces the later maintenance cost. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of the wear-resistant working cylinder body for the air suspension mechanism is shown. Figure 2A schematic diagram of the elastic sealing part is shown; Figure 3 A schematic diagram of the elastic part and the guide limiting groove is shown.

[0018] Legend: 100, Cylinder block; 200, Piston; 300, Elastic seal; 310, Fan-shaped groove; 320, Fan-shaped flap; 330, Elastic part; 340, Guide and limiting groove; 350, Slide rail; 360, Slider. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0020] Figure 1 In this air suspension mechanism, a wear-resistant working cylinder body is used, comprising: Cylinder block 100; Piston 200 is slidably fitted into cylinder 100; The elastic sealing part 300 is disposed outside the piston 200 and adaptively fills the gap between the cylinder 100 and the piston 200 when the piston 200 slides.

[0021] The piston 200 and cylinder 100 use a clearance fit to ensure smooth sliding, but the clearance can easily lead to hydraulic oil leakage or air infiltration. The elastic sealing part 300, through its own elastic deformation, always fits against the inner wall of the cylinder 100 and the outer wall of the piston 200 during the piston sliding process, filling the dynamically changing gap in real time and forming a continuous sealing surface. The adaptive filling design solves the contradiction between "smooth sliding" and "reliable sealing", avoiding the sliding jamming caused by interference fit and preventing the leakage problem of clearance fit. At the same time, the flexible contact of the elastic sealing part replaces the direct metal contact between the piston and the cylinder, reducing scratches and wear on the inner wall of the cylinder and further enhancing wear resistance.

[0022] Figure 2 and Figure 3 In the middle, the elastic sealing part 300 includes: Fan-shaped flaps 320 are disposed between piston 200 and cylinder 100; The elastic part 330 is pre-compressed and positioned between the piston 200 and the cylinder 100, so that when the piston 200 slides, it presses the piston 200 to continuously adhere to the cylinder 100. The elastic part 330 is pre-compressed and has a continuous tendency to stretch and recover. Its stretching direction directly acts on the fan-shaped petals 320, pushing the fan-shaped petals 320 to adhere tightly to the inner wall of the cylinder 100. The design of the pre-compressed elastic part gives the sealing and fitting "active force", avoiding the limitations of traditional sealing that relies on pressure difference for passive sealing, making the sealing more reliable.

[0023] Figure 2 and Figure 3 In this configuration, the extension direction of the elastic portion 330 is arranged to be perpendicular to the fan-shaped petals 320.

[0024] The elastic part 330 is perpendicular to the extension direction of the fan-shaped petals 320, which can completely convert the elastic force into the radial thrust of the fan-shaped petals, ensuring that the fan-shaped petals 320 are tightly attached to the inner wall in the direction perpendicular to the axis of the cylinder 100, avoiding the fan-shaped petals from tilting or unevenly attaching due to the dispersion of elastic force; at the same time, the vertical force transmission makes the deformation of the fan-shaped petals change regularly, only radial expansion and contraction, without circumferential twisting, and the uniform attachment of the fan-shaped petals avoids the residual gaps in some areas.

[0025] In one embodiment, five sets of elastic portions 330 are provided, evenly distributed according to the shape of the fan-shaped petals 320, and the extension direction of the five sets of elastic portions 330 is perpendicular to the fan-shaped petals 320.

[0026] Five sets of elastic sections are evenly distributed along the fan-shaped lobes 320, which can apply balanced thrust at different radial positions of the fan-shaped lobes, avoiding localized force concentration caused by a single elastic section. Even if one set of elastic sections fails slightly, the other four sets can still maintain basic sealing, reducing the risk of sudden failure of the movement.

[0027] Figure 2 and Figure 3 In the piston 200, a fan-shaped groove 310 is formed, and fan-shaped lobes 320 are arranged to cover the fan-shaped groove 310.

[0028] The shape of the fan-shaped groove 310 matches that of the fan-shaped petals 320, providing precise installation and positioning space for the fan-shaped petals, limiting the circumferential displacement of the fan-shaped petals, and ensuring the continuity of the seal. The covering configuration allows the fan-shaped petals 320 to completely cover the opening of the fan-shaped groove 310, avoiding seal failure caused by the accumulation of oil or impurities in the groove. At the same time, the support of the groove body for the fan-shaped petals extends their service life and avoids cracking caused by excessive deformation.

[0029] Figure 3 In the piston 200, a guide limiting groove 340 is formed, so that the elastic part 330 is fitted into the guide limiting groove 340, thereby limiting the extension direction of the elastic part 330.

[0030] The channel direction of the guide limiting groove 340 is consistent with the preset extension direction of the elastic part 330. After installation, the elastic part can only extend and retract along the channel direction and cannot be deviated due to vibration or force. The limiting extension direction ensures that the force of the elastic part always acts accurately on the fan-shaped petals 320. The side wall of the groove can also protect the elastic part and avoid wear caused by direct friction between it and the inner wall of the cylinder 100. At the same time, the embedded design makes the installation of the elastic part more convenient. During later maintenance, it can be removed along the channel, reducing maintenance costs.

[0031] Figure 2 In the middle, a limiting movement part is provided between the fan-shaped petals 320 and the piston 200 to restrict their relative radial movement.

[0032] The movement restriction mechanism ensures the relative position of the fan-shaped flap 320 and the piston 200 is stable through "bidirectional constraint". This allows the fan-shaped flap to move adaptively in the radial direction, while preventing it from moving out of the support range of the piston 200 due to excessive movement. This constraint keeps the movement of the fan-shaped flap within a controllable range and avoids seal interruption due to excessive displacement.

[0033] Figure 2 In the middle, the movement restriction part includes a slide 350 formed on the piston 200 and a slider 360 that slides within the slide 350; The slide 350 is configured to have an opening that connects to the edge of the fan-shaped groove 310 and the piston 200, and the slider 360 is connected to the fan-shaped petals 320, thereby restricting the movement path of the slider 360.

[0034] The slider 360 is rigidly connected to the fan-shaped petal 320. The length and width of the slide 350 match the slider, so that the slider can only slide along the axial direction of the slide and cannot move in the circumferential or vertical direction. The opening design of the slide 350 facilitates the overall installation of the fan-shaped petal 320 and the slider 360, and can be directly inserted into the slide from the edge of the piston. The connection between the slider and the fan-shaped petal allows the two to move synchronously, ensuring that the constraint path is completely consistent with the movement path of the fan-shaped petal.

[0035] See also Figure 2 The elastic sealing part 300 is evenly arranged in six groups around the circumference, and there is a gap between the fan-shaped petals 320 in two adjacent groups of elastic sealing parts 300, thereby allowing the fan-shaped petals 320 to move radially.

[0036] Six sets of elastic seals fully cover the piston 200 circumferentially, ensuring that every part of the inner wall of the cylinder 100 is sealed; the gap between adjacent fan-shaped lobes 320 provides space for their respective radial movement, avoiding movement jamming caused by the mutual squeezing of adjacent lobes; the uniform distribution ensures consistent circumferential sealing pressure, with no local weak points, and the gap design ensures the flexibility of the fan-shaped lobes' movement, ensuring that they can quickly respond to local gap changes.

[0037] See also Figure 2 The size of the gap is configured to form an oil film to seal the gap when the piston 200 makes piston movement.

[0038] When the piston 200 reciprocates, the hydraulic oil in the cylinder 100 is carried into the gap between the adjacent sector-shaped lobes 320. Because the gap size is precisely calculated, the oil film can form a stable "liquid sealing layer" in the gap. The oil film will not break due to excessive gap, nor will it hinder the movement of the sector-shaped lobes due to insufficient gap. At the same time, the oil film can also lubricate the contact surface between the sector-shaped lobes and the cylinder, reducing friction.

[0039] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A wear-resistant working cylinder body for an air suspension mechanism, characterized in that, include: Cylinder block (100); The piston (200) is slidably fitted into the cylinder (100); An elastic sealing part (300) is configured outside the piston (200) to adaptively fill the gap between the cylinder (100) and the piston (200) when the piston (200) slides.

2. The wear-resistant working cylinder body for the air suspension mechanism according to claim 1, characterized in that, The elastic sealing part (300) includes: A fan-shaped flap (320) is disposed between the piston (200) and the cylinder (100); The elastic part (330) is pre-compressed and positioned between the piston (200) and the cylinder (100), pressing the piston (200) to continuously adhere to the cylinder (100) as the piston (200) slides.

3. The wear-resistant working cylinder body for the air suspension mechanism according to claim 2, characterized in that: The extension direction of the elastic part (330) is configured to be perpendicular to the fan-shaped petals (320).

4. The wear-resistant working cylinder body for the air suspension mechanism according to claim 3, characterized in that: The elastic part (330) is provided in multiple sets, which are evenly distributed according to the shape of the fan-shaped petals (320), and the extension direction of the elastic part (330) is perpendicular to the fan-shaped petals (320).

5. The wear-resistant working cylinder body for the air suspension mechanism according to claim 3, characterized in that: A fan-shaped groove (310) is formed on the piston (200), and the fan-shaped lobes (320) are arranged to cover the fan-shaped groove (310).

6. The wear-resistant working cylinder body for the air suspension mechanism according to claim 3, characterized in that: A guide limiting groove (340) is formed on the piston (200) so that the elastic part (330) is fitted into the guide limiting groove (340), thereby limiting the extension direction of the elastic part (330).

7. The wear-resistant working cylinder body for an air suspension mechanism according to claim 3, characterized in that: Between the fan-shaped petals (320) and the piston (200), a limiting movement part is provided to restrict their relative radial movement.

8. The wear-resistant working cylinder body for an air suspension mechanism according to claim 7, characterized in that: The movement restriction part includes a slide (350) formed on the piston (200) and a slider (360) that slides within the slide (350). The slide (350) is configured to have an opening that connects the edge of the fan-shaped groove (310) and the piston (200), and the slider (360) is connected to the fan-shaped petals (320) to restrict the movement path of the slider (360).

9. The wear-resistant working cylinder body for an air suspension mechanism according to any one of claims 1-8, characterized in that: The elastic sealing part (300) is uniformly arranged in six groups around the circumference, and there is a gap between the fan-shaped petals (320) in two adjacent groups of elastic sealing parts (300), thereby allowing the fan-shaped petals (320) to move radially.

10. The wear-resistant working cylinder body for an air suspension mechanism according to claim 9, characterized in that: The size of the gap is configured to form an oil film that seals the gap when the piston (200) makes piston movement.

Images