Anti-deformation air suspension movement cylinder barrel

Abstract

The utility model relates to an anti-deformation air suspension machine core working cylinder barrel, the cylinder barrel is a split structure, including inner tube and coaxial sleeve setting the outer tube outside the inner tube, under the installation condition, the outer tube applies the sustained radial extrusion to the inside, makes the inner tube be pre -tight to resist the deformation, the radial extrusion of the taper surface cooperation of the outer tube in the utility model produces the even pre -tight of the inner tube, can effectively offset the air pressure expansion load when air suspension works, reduces the inner tube cylindricity deviation, the inner tube, the press cylinder, the fixed cylinder's no -gap interference fit forms rigid whole, can fast transmission instantaneous impact load, avoids the cracking caused by local stress concentration, significantly promotes the cylinder barrel anti-deformation stability.

Description

Technical Field

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

[0002] The working cylinder of the air suspension mechanism is a key component that bears air pressure and transmits force. Traditional working cylinders are mostly made of one piece of steel. However, when the air suspension is working, the cylinder needs to withstand high-frequency air pressure fluctuations and instantaneous impact loads. Due to the uneven distribution of structural rigidity, the one-piece cylinder is prone to circumferential expansion or local twisting, which can lead to piston movement jamming, accelerated wear of seals, and even airbag leakage. Utility Model Content

[0003] This utility model addresses the problems of existing technologies by providing a cylinder barrel for an anti-deformation air suspension mechanism. The specific technical solution is as follows: A working cylinder of an anti-deformation air suspension mechanism is disclosed. The cylinder is a split structure, including an inner cylinder and an outer cylinder coaxially sleeved outside the inner cylinder. In the installed state, the outer cylinder applies a continuous radial compressive force inward to pre-compress the inner cylinder to resist deformation.

[0004] As a further technical solution of this utility model, the outer cylinder includes a pressure cylinder and a fixing cylinder arranged sequentially from the inside to the outside; Along the installation direction, the outer surface thickness of the pressure cylinder decreases to form a conical structure, and the inner surface thickness of the fixing cylinder decreases to form a conical cavity that matches the conical structure; In the installed state, the fixed cylinder can force the pressure cylinder to squeeze the inner cylinder inward to resist deformation.

[0005] As a further technical solution of this utility model, in the installed state, the inner cylinder, the pressure cylinder, and the fixed cylinder are interference-fitted with each other.

[0006] As a further technical solution of this utility model, a flange is connected to the top of the pressure cylinder, and multiple through holes are opened on the flange along the circumferential direction.

[0007] The beneficial effects of this utility model are as follows: The radial compressive force generated by the conical fit applies a uniform preload to the inner cylinder, effectively counteracting the air pressure expansion load during air suspension operation and reducing the cylindricity deviation of the inner cylinder. The clearance-free interference fit of the inner cylinder, pressure cylinder, and fixed cylinder forms a rigid whole, which can quickly transmit instantaneous impact loads, avoid cracking caused by local stress concentration, and significantly improve the cylinder's deformation resistance stability. The assembly logic of "inner cylinder → fixed cylinder → pressure cylinder" is adopted. With the conical mating structure of the pressure cylinder and the fixed cylinder, the axial thrust of the bolts replaces the traditional hammering assembly. The axial force is naturally converted into radial extrusion force along the conical surface. The interference fit can be achieved without violent impact. This reduces the physical strength required for assembly and avoids problems such as component scratches and conical surface deformation caused by hammering, thus protecting the precision of the inner wall of the inner cylinder and the structural integrity of the outer cylinder. The modular design allows for individual component replacement, avoiding the problem of complete system failure due to partial damage in traditional one-piece cylinders, thus reducing operating costs. The bolted flange structure facilitates disassembly and maintenance, significantly improving post-maintenance efficiency compared to welding or snap-fit ​​connections. Attached Figure Description

[0008] Figure 1 A schematic diagram of the overall structure of the working cylinder barrel of an anti-deformation air suspension mechanism is shown; Figure 2 A schematic diagram of the outer cylinder structure is shown; Figure 3 A schematic diagram of the structure of the working cylinder of an anti-deformation air suspension mechanism during assembly is shown.

[0009] Legend: 100, Inner cylinder; 200, Outer cylinder; 210, Pressure cylinder; 211, Flange; 212, Screw hole; 220, Fixed cylinder. Detailed Implementation

[0010] 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.

[0011] Figure 1 A schematic diagram of the overall structure of the working cylinder barrel of an anti-deformation air suspension mechanism is shown; Figure 1 In this type of anti-deformation air suspension mechanism working cylinder, the cylinder is a split structure, including an inner cylinder 100 and an outer cylinder 200 coaxially sleeved outside the inner cylinder 100. In the installed state, the outer cylinder 200 presses the inner cylinder 100 inward to resist deformation. Compared to the traditional one-piece cylinder, the split structure, through the division of labor design of "inner cylinder bearing the core working load + outer cylinder providing radial constraint", utilizes the coaxial sleeve relationship between the outer cylinder 200 and the inner cylinder 100. During installation, the outer cylinder 200 can apply continuous radial extrusion force to the inward side through its own structural rigidity, so that the inner cylinder 100 is in a "compressed" state in advance. This design allows the inner cylinder 100 to withstand the working air pressure of the air suspension mechanism in the future, and the extrusion force of the outer cylinder 200 can offset part of the outward expansion force of the air pressure on the middle cylinder. This structure not only avoids the material performance contradiction caused by the one-piece cylinder "having to bear the load and resist deformation", but also improves the deformation resistance of the inner cylinder through the active extrusion of the outer cylinder, reduces the deformation of the inner cylinder caused by air pressure expansion, thereby ensuring the sealing performance of the cylinder and extending the overall service life of the mechanism.

[0012] Figure 2 A schematic diagram of the structure of an outer cylinder 200 is shown; Figure 3 A schematic diagram of the structure of the working cylinder barrel of an anti-deformation air suspension mechanism during assembly is shown; Figure 2 and Figure 3 In the middle, the outer cylinder 200 includes a pressure cylinder 210 and a fixed cylinder 220 arranged sequentially from the inside to the outside; Along the installation direction, the outer surface thickness of the pressure cylinder 210 decreases to form a conical structure, and the inner surface thickness of the fixing cylinder 220 decreases to form a conical cavity that matches the conical structure. In the installed state, the fixed cylinder 220 can force the pressure cylinder 210 to press the inner cylinder 100 inward to resist deformation. After installation, the conical cavity of the fixed cylinder 220 and the conical structure of the pressure cylinder 210 form a "self-locking" mechanism. Due to its rigidity, the fixed cylinder 220 cannot expand outward, thus limiting the radial rebound of the pressure cylinder 210. Through the "forced compression" effect of the fixed cylinder 220 on the pressure cylinder 210, the inner cylinder 100 is always in a "pre-compressed state." Even under long-term high-frequency air pressure fluctuations, the inner cylinder 100 is not prone to permanent deformation. When the inner cylinder 100 is subjected to the air pressure of the air suspension mechanism during operation, the compressive force of the pressure cylinder 210 can directly offset part of the expansion force, reducing the deformation of the inner cylinder 100. This active resistance to deformation design avoids the decrease in the inner wall precision of the inner cylinder 100 due to deformation, ensures smooth piston movement of the air suspension mechanism, reduces frictional wear between the piston and the inner cylinder, and improves the working efficiency of the mechanism.

[0013] In the installed state, the inner cylinder 100, the pressure cylinder 210, and the fixed cylinder 220 are interference-fitted with each other. An interference fit means that there is no assembly gap between the three components, forming a tight integral structure after installation. When the inner cylinder 100 is subjected to an outward expansion force, the force is quickly transmitted to the pressure cylinder 210 through the tight contact surface between the inner cylinder 100 and the pressure cylinder 210, and then transmitted from the pressure cylinder 210 to the fixed cylinder 220. The gapless interference fit greatly improves the rigidity of the overall structure and avoids relative swaying between components caused by gaps. The rigid structure of the fixed cylinder 220 generates a reverse constraint force, which is fed back to the inner cylinder 100 through the pressure cylinder 210, forming a "closed-loop force transmission". This avoids local stress concentration and makes the anti-deformation response faster. When a sudden impact load is applied to the inner cylinder 100, the force can be instantly transmitted to the fixed cylinder 220 and canceled out, preventing the inner cylinder 100 from cracking due to excessive instantaneous stress and improving the impact resistance of the cylinder.

[0014] A flange 211 is connected to the top of the pressure cylinder 210, and multiple through holes 212 are provided on the flange 211 along the circumferential direction.

[0015] The flange 211 serves as the connecting carrier between the pressure cylinder 210 and other components of the air suspension mechanism. Bolts are installed through the circumferentially distributed perforations 212, which can fix the pressure cylinder 210 to the external components. The circumferentially distributed perforations 212 allow the tightening force of the bolts to be evenly transmitted to the flange 211, and then from the flange 211 to the pressure cylinder 210. This ensures that the pressure cylinder 210 is axially fixed while maintaining coaxiality with the inner cylinder 100, and avoids the pressure cylinder 210 tilting due to excessive tightening of bolts on one side, thereby ensuring that the pressure cylinder 210 exerts uniform extrusion force on the middle cylinder.

[0016] The installation method is as follows: Step 1: Pre-assemble the inner cylinder and the fixed cylinder; First, smoothly place the inner cylinder 100 into the cylinder along the coaxial installation path of the cylinder body, adjust the axial position of the inner cylinder 100 so that both ends of the inner cylinder are aligned with the cylinder body installation reference surface, and complete the initial positioning of the inner cylinder. Next, the fixed cylinder 220 is inserted into the cylinder body, so that the axis of the fixed cylinder 220 coincides with the axis of the inner cylinder 100. The fixed cylinder is slowly lowered until its bottom fits tightly against the fixed cylinder support step inside the cylinder body. At this time, the conical cavity of the fixed cylinder 220 faces upward, reserving adaptation space for subsequent pressure cylinder assembly.

[0017] Step 2: Assemble the pressure cylinder with the conical surfaces of the inner cylinder and the fixed cylinder; Hold the pressure cylinder 210 and precisely align the conical outer surface of the pressure cylinder with the conical cavity of the fixed cylinder 220, while ensuring that the axis of the pressure cylinder is coaxial with the axis of the inner cylinder 100; Select appropriate bolts, pass them through the through holes 212 of the flange 211 and screw them into the bolt holes of the cylinder body. The bolt heads can push the flange 211 to apply a steady thrust to the pressure cylinder 210 along the axial direction. As the pressure cylinder is continuously pushed into the conical cavity of the fixed cylinder 220, the contact area between the two conical surfaces gradually increases, and the axial thrust is naturally converted into radial extrusion force, which forces the pressure cylinder 210 to contract inward and fit tightly against the outer wall of the inner cylinder 100 until the flange 211 at the top of the pressure cylinder 210 fits against the top of the fixed cylinder 220. At this time, the inner cylinder 100, the pressure cylinder 210, and the fixed cylinder 220 form an "interference fit" and the pressure cylinder assembly is completed.

[0018] By utilizing the conical structure, the axial thrust is converted into radial compressive force, achieving an interference fit between the three forces without hammering. This reduces the physical effort required for installation and avoids damage to the conical outer surface of the pressure cylinder and cracking of the fixing cylinder caused by hammering, thus ensuring the integrity of the components.

[0019] 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 working cylinder barrel for an anti-deformation air suspension mechanism, characterized in that, The cylinder is a split structure, including an inner cylinder (100) and an outer cylinder (200) coaxially sleeved outside the inner cylinder (100). In the installed state, the outer cylinder (200) applies a continuous radial compressive force to the inner side, so that the inner cylinder (100) is pre-compressed to resist deformation.

2. The cylinder barrel of the anti-deformation air suspension mechanism working cylinder according to claim 1, characterized in that: The outer cylinder (200) includes a pressure cylinder (210) and a fixing cylinder (220) arranged sequentially from the inside to the outside; Along the installation direction, the outer surface thickness of the pressure cylinder (210) decreases to form a conical structure, and the inner surface thickness of the fixing cylinder (220) decreases to form a conical cavity that matches the conical structure; In the installed state, the fixed cylinder (220) can force the pressure cylinder (210) to press the inner cylinder (100) inward to resist deformation.

3. The cylinder barrel of the anti-deformation air suspension mechanism working cylinder according to claim 2, characterized in that: In the installed state, the inner cylinder (100), the pressure cylinder (210), and the fixed cylinder (220) are interference-fitted with each other.

4. The cylinder barrel of the anti-deformation air suspension mechanism working cylinder according to claim 3, characterized in that: The top of the pressure cylinder (210) is connected to a flange (211), and the flange (211) has multiple perforations (212) along the circumferential direction.

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