Anti-torsion support device for heavy truck rear axle air spring base

Abstract

The utility model relates to heavy truck rear axle air spring base anti -twist support device, include: base plate, interval setting piston above base plate, and the anti -twist component of connecting between base plate, piston, the anti -twist component can be when the base plate torsion self -adaptation compensation to maintain the current state of piston, the anti -twist component includes the air bag and connecting shaft of coaxial setting between base plate, piston, the air bag is annular structure, one end of connecting shaft is connected in piston bottom, and the other end is with base plate floating connection to realize the relative floating between base plate, piston. The utility model anti -twist component adopts the coaxial cooperation structure of "annular air bag + ball cavity ball body connecting shaft", and the ball body of connecting shaft and the ball cavity of base plate form multidimensional floating cooperation, and the ball body can self -adaptation rotate, fine adjustment in the ball cavity, and offset the pulling of base plate to piston when torsion later bridge, and the ball center of ball body is limited in the ball cavity, and the piston always keeps horizontal working posture during compensation process is ensured.

Description

Technical Field

[0001] This utility model belongs to the technical field of air spring bases, and specifically relates to an anti-torsion support device for air spring bases of heavy truck rear axles. Background Technology

[0002] Heavy-duty trucks, as core equipment in the freight industry, need to bear heavy loads and travel on complex road conditions for extended periods. The rear axle, as a crucial assembly for transmitting power and bearing the weight of the entire vehicle, directly impacts the driving safety and comfort of heavy-duty trucks due to its operational stability. Air springs, with their adjustable stiffness and excellent shock absorption performance, are widely used in heavy-duty truck rear axle suspension systems. The air spring base, as a core transitional component connecting the air spring and the rear axle, can evenly transmit the force of the air spring to the rear axle.

[0003] However, when heavy trucks travel on curves or uneven roads, the rear axle will generate multi-dimensional torsional forces due to differences in tire grip and changes in load distribution. These torsional forces are directly transmitted to the piston and airbag of the air spring through the rigid structure of the base. On the one hand, the piston is forced to twist and shift with the base, causing the assembly gap between the airbag and the piston to shift, and the airbag body is locally stretched or squeezed. On the other hand, the rigid connection cannot offset the stress in the torsional direction, and the airbag body needs to withstand additional torsional shear force. After long-term use, the fabric layer of the airbag body is prone to fiber breakage, which eventually leads to airbag tearing and leakage failure. Utility Model Content

[0004] This utility model addresses the problems of existing technologies by providing a torsional support device for the air spring base of a heavy-duty truck rear axle. The specific technical solution is as follows: The heavy-duty truck rear axle air spring base anti-torsional support device includes: substrate; Pistons spaced apart above the substrate; And an anti-torsion assembly connected between the substrate and the piston, the anti-torsion assembly being able to adaptively compensate for the torsion of the substrate to maintain the current state of the piston; The anti-torsion component includes an airbag and a connecting shaft coaxially disposed between the base plate and the piston. The airbag has an annular structure. One end of the connecting shaft is connected to the bottom of the piston, and the other end is floatingly connected to the base plate to achieve relative floating between the base plate and the piston.

[0005] As a further technical solution of this utility model, the connecting shaft includes a rod that can be connected to the piston and a ball connected to the other end of the rod. A ball cavity is formed on the base plate, and the ball is floatingly disposed in the ball cavity so that the base plate and the piston float relative to each other.

[0006] As a further technical solution of this utility model, the sphere is embedded in the spherical cavity, and the center of the sphere is placed in the spherical cavity.

[0007] As a further technical solution of this utility model, the substrate has a flange portion extending radially beyond the piston, and a plurality of bolts are uniformly arranged circumferentially on the flange portion.

[0008] As a further technical solution of this utility model, the flange portion has a spring piece, the spring piece includes a spring piece body connected to the base plate, the spring piece body is an inclined structure extending towards the piston, the fitting end is connected to the extended end of the spring piece body and fits the piston, and multiple sets of spring pieces are evenly arranged circumferentially on the flange portion to form a support cage surrounding the piston.

[0009] The beneficial effects of this utility model are as follows: (1) The anti-torsion component adopts a coaxial collaborative structure of "annular airbag + ball cavity ball connecting shaft": On the one hand, the ball of the connecting shaft and the ball cavity of the substrate form a multi-dimensional floating fit. The ball can rotate adaptively and finely adjust in the ball cavity to offset the pull on the piston when the substrate is twisted by the subsequent axle; on the other hand, the center of the ball is limited in the ball cavity to ensure that the piston always maintains a horizontal working posture during the compensation process, avoids the air spring from bearing torsional stress due to piston offset, effectively prevents air spring seal failure and structural breakage, and extends its service life.

[0010] (2) The device achieves dual protection through "airbag buffer + spring sheet auxiliary support": the annular airbag forms an elastic buffer layer between the base plate and the piston, which can absorb longitudinal vibration and slight torsional impact through the compression and expansion of the air chamber; multiple sets of spring sheets evenly distributed around the flange form a support cage around the piston with an inclined structure, which can not only buffer the small displacement through elastic deformation to assist the anti-torsion component, but also constrain the piston to avoid large shaking under sudden large torsional force. Without affecting the normal extension and contraction of the piston, the pressure on the anti-torsion component is greatly reduced, and the overall impact resistance of the device is improved. Attached Figure Description

[0011] Figure 1 A schematic diagram of the overall structure of the anti-torsion support device for the air spring base of the heavy truck rear axle is shown. Figure 2 A schematic diagram of the anti-torsion component is shown; Figure 3 A schematic diagram of the connection structure between the connecting shaft and the substrate is shown; Figure 4 A schematic diagram of the spring is shown.

[0012] Legend: 100, base plate; 110, flange; 111, bolt; 120, spring; 121, spring body; 122, mating end; 130, ball cavity; 200, piston; 300, anti-torsion assembly; 310, airbag; 320, connecting shaft; 321, rod; 322, ball. Detailed Implementation

[0013] 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.

[0014] Figure 1 A schematic diagram of the overall structure of the anti-torsion support device for the air spring base of the heavy truck rear axle is shown. Figure 1 The anti-torsional support device for the rear axle air spring base of the heavy truck includes: The base plate 100 has a flange portion 110 extending radially beyond the piston 200, and a plurality of bolts 111 are uniformly arranged circumferentially on the flange portion 110. Pistons 200 are spaced above the substrate 100; And an anti-torsion component 300 connected between the substrate 100 and the piston 200, the anti-torsion component 300 can adaptively compensate when the substrate 100 is torn to maintain the current state of the piston 200.

[0015] The base plate 100, as the fundamental load-bearing component of the device, bears the overall weight and transmits external forces. The flange 110, through its radial extension design, expands the fixing range of the base plate 100 to the outside of the piston 200. Combined with multiple sets of circumferentially evenly distributed bolts 111, the device can be stably fixed to the corresponding installation position on the rear axle of the heavy truck, avoiding uneven stress caused by installation misalignment. The piston 200 and base plate 100 are spaced apart, providing ample space for relative movement between them. When the rear axle generates torsional force during heavy truck operation, the base plate 100 will rotate synchronously with the axle. At this time, the anti-torsion component 300 connecting the two will adaptively adjust through its own structural deformation or relative movement, such as offsetting the effect of torsional force on the piston 200, ensuring that the piston 200 always maintains its preset working position. This design ensures the overall installation stability of the device through the flange 110 and bolts 111, and prevents the piston 200 from shifting with the rotation of the base plate 100 through the compensation function of the anti-torsion component 300, thereby protecting the air spring from torsional stress damage and extending its service life.

[0016] Figure 2 A schematic diagram of the anti-torsion component 300 is shown. Figure 2 In the process, the anti-torsion component 300 includes an airbag 310 and a connecting shaft 320 coaxially disposed between the base plate 100 and the piston 200. The airbag 310 has an annular structure. One end of the connecting shaft 320 is connected to the bottom of the piston 200, and the other end is rotatably connected to the base plate 100 to realize relative rotation between the base plate 100 and the piston 200.

[0017] The anti-torsion component 300 adopts a coaxial structure of "airbag + connecting shaft". The coaxial design ensures that the force center of the airbag 310 and the connecting shaft 320 coincides with the overall center of the device, avoiding structural deformation caused by excessive force on one side. The annular airbag 310 forms an elastic buffer layer between the base plate 100 and the piston 200. When the device is subjected to longitudinal vibration or slight torsional force, the airbag 310 can absorb part of the impact force through the compression and expansion of the inflation chamber. At the same time, one end of the connecting shaft 320 is rigidly connected to the piston 200, and the other end is rotatably connected to the base plate 100. When the base plate 100 is rear axled and twisted, the connecting shaft 320 can rotate around the connecting end of the base plate 100, keeping the piston 200 relatively stationary. This dual cooperation of "buffering + rotation" weakens the initial impact force of torsion through the airbag 310 and achieves torsional compensation through the relative rotation of the connecting shaft 320, preventing the anti-torsion component 300 from breaking due to hard force, while ensuring the working stability of the piston 200 and improving the torsional fault tolerance of the device.

[0018] Figure 3 A schematic diagram of the connection structure between the connecting shaft 320 and the substrate 100 is shown. Figure 3 In the process, the connecting shaft 320 includes a rod 321 that can be connected to the piston 200 and a ball 322 connected to the other end of the rod 321. A ball cavity 130 is formed on the substrate 100, and the ball 322 is embedded in the ball cavity 130 so that the substrate 100 and the piston 200 float relative to each other.

[0019] The connecting shaft 320 is rigidly connected to the piston 200 via the rod 321, ensuring effective force transmission. The ball 322 at its other end is embedded in the ball cavity 130 of the base plate 100, forming a floating fit structure. The ball 322 can rotate or move slightly in any direction within the ball cavity 130, thereby driving the rod 321 and piston 200 to achieve multi-dimensional relative floating. When the base plate 100 twists, the ball cavity 130 rotates synchronously with the base plate 100. Under the combined action of its own weight and the pressure of the piston 200, the ball 322 adaptively adjusts its posture within the ball cavity 130, offsetting the pull of the base plate 100's twisting motion on the rod 321, ultimately maintaining the stable position of the piston 200. This floating structure avoids stress concentration during torsion, and the multi-dimensional floating capability allows for more flexible compensation, adapting to the complex torsional angle changes of the rear axle during heavy truck operation, reducing wear on the connecting shaft 320 and the base plate 100, and extending the component replacement cycle.

[0020] Furthermore, the center of sphere 322 is placed inside sphere cavity 130.

[0021] By confining the center of the ball 322 within the ball cavity 130, it is ensured that the ball 322's range of motion is always contained within the ball cavity 130. Regardless of the direction in which the ball 322 rotates or moves, its center point will not exceed the effective bearing capacity of the ball cavity 130, thus preventing the ball 322 from detaching from the ball cavity 130 due to excessive movement. Simultaneously, the design of the ball's center within the ball cavity 130 ensures that every posture adjustment of the ball 322 is based on the center of the ball cavity 130, guaranteeing the symmetry of the float and preventing the piston 200 from tilting to one side due to ball center deviation. This design not only solves the risk of the ball-cavity fit detaching but also improves the accuracy of adaptive compensation, ensuring that the piston 200 always operates in a horizontal state.

[0022] Figure 4 A schematic diagram of the structure of the spring 120 is shown; Figure 4 In the flange portion 110, there is a spring piece 120. The spring piece 120 includes a spring piece body 121 connected to the base plate 100. The spring piece body 121 is an inclined structure extending towards the piston 200. The fitting end 122 is connected to the extended end of the spring piece body 121 and fits against the piston 200. Multiple sets of spring pieces 120 are evenly arranged circumferentially on the flange portion 110 to form a support cage surrounding the piston 200.

[0023] The spring piece 120 is connected to the base plate 100 via the spring piece body 121. The inclined structure gives the spring piece body 121 a certain elastic deformation capability. When the piston 200 undergoes a slight displacement due to road conditions, the contact end 122 will push the spring piece body 121 to elastically bend in sync with the displacement of the piston 200. The reaction force generated by the bending can buffer the displacement of the piston 200 in the opposite direction. At the same time, multiple sets of spring pieces 120 are evenly distributed around the flange portion 110 to form a support cage around the piston 200, providing all-round elastic constraint on the piston 200 from the outer periphery. This design, on the one hand, uses the elastic deformation of the spring pieces to assist the anti-torsion component 300 in buffering vibration and small torsional forces, reducing the load pressure on the anti-torsion component 300; on the other hand, the outer peripheral support cage can prevent the piston 200 from swaying or shifting significantly due to sudden large torsional forces, improving the overall impact resistance of the device. In addition, the contact design of the spring piece 120 does not affect the normal extension and retraction of the piston 200, ensuring the support effect while taking into account the working flexibility of the air spring. 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 torsional support device for the air spring base of a heavy-duty truck rear axle, characterized in that, include: substrate(100); Pistons (200) are spaced above the substrate (100). And an anti-torsion assembly (300) connected between the substrate (100) and the piston (200), the anti-torsion assembly (300) being able to adaptively compensate for the torsion of the substrate (100) to maintain the current state of the piston (200); The anti-torsion assembly (300) includes an airbag (310) and a connecting shaft (320) coaxially disposed between the base plate (100) and the piston (200). The airbag (310) has an annular structure. One end of the connecting shaft (320) is connected to the bottom of the piston (200), and the other end is floatingly connected to the base plate (100) to realize relative floating between the base plate (100) and the piston (200).

2. The anti-torsional support device for the air spring base of a heavy-duty truck rear axle according to claim 1, characterized in that: The connecting shaft (320) includes a rod (321) that can be connected to the piston (200) and a ball (322) connected to the other end of the rod (321). A ball cavity (130) is provided on the base plate (100). The ball (322) is floatingly disposed in the ball cavity (130) so that the base plate (100) and the piston (200) float relative to each other.

3. The anti-torsional support device for the air spring base of a heavy-duty truck rear axle according to claim 2, characterized in that: The sphere (322) is embedded in the spherical cavity (130), and the center of the sphere (322) is placed in the spherical cavity (130).

4. The anti-torsional support device for the air spring base of a heavy-duty truck rear axle according to claim 3, characterized in that: The base plate (100) has a flange (110) extending radially beyond the piston (200), and a plurality of bolts (111) are uniformly arranged circumferentially on the flange (110).

5. The anti-torsional support device for the air spring base of a heavy-duty truck rear axle according to claim 4, characterized in that: The flange (110) has a spring piece (120), the spring piece (120) includes a spring piece body (121) connected to the base plate (100), the spring piece body (121) is an inclined structure extending toward the piston (200), the fitting end (122) is connected to the extended end of the spring piece body (121) and fits the piston (200), and multiple sets of spring pieces (120) are evenly arranged circumferentially on the flange (110) to form a support cage surrounding the piston (200).

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