Flat spiral spring

Abstract

The utility model belongs to the technical field of volute spiral springs, and particularly relates to a plane volute spiral spring which comprises an outer spiral spring and an inner spiral spring, the plane volute spiral spring is composed of the outer spiral spring and the inner spiral spring, an adhesive is arranged on the outer end face of the inner spiral spring, and an interlayer structure is bonded through the adhesive. And wear-resistant rubber is adhered to the outer end surface of the outer spiral spring through an adhesive. The double-layer spring structure is matched with the high-strength stainless steel sheets, the bearing capacity and stability are higher, larger torque and deformation can be borne, the fatigue fracture risk is reduced, the interlayer is made of the carbon fiber cloth, the weight is reduced, the strength is enhanced, the automobile lightweight trend is met, and the high-temperature-resistant epoxy resin adhesive ensures that all the layers are stably connected and resists vibration impact; due to the design of the wear-resistant rubber, the notch grooves and the convex strips, wear is reduced, stress is buffered, displacement is prevented, the service life is prolonged, vibration noise is reduced, and the running quality, safety and comfort of an automobile are comprehensively improved.

Description

Technical Field

[0001] This utility model relates to the field of spiral spring technology, specifically a planar spiral spring. Background Technology

[0002] In the modern automotive manufacturing industry, with the rapid development of technology and increasingly stringent consumer demands for vehicle performance, the optimization and innovation of automotive components has become a key breakthrough. As a crucial elastic element among the many automotive parts, the performance of planar spiral springs directly affects the overall vehicle's running quality, safety, and comfort.

[0003] Traditional planar spiral springs typically employ a single-structure design, usually consisting of only a single spring layer, and their material choices are relatively limited, commonly using ordinary carbon steel or low-alloy steel. This traditional design reveals numerous drawbacks when facing the complex and varied operating conditions of automobiles. For example, in high-temperature environments, springs made of ordinary carbon steel are prone to oxidation and strength reduction, leading to decreased elasticity or even failure, severely impacting the normal operation of high-temperature components such as those around the engine. Furthermore, in scenarios involving frequent extension and contraction under heavy loads, such as in car seat adjustment mechanisms and window regulators, low-alloy steel springs have a shorter fatigue life and are more prone to breakage, not only reducing the reliability of automotive components but also potentially posing safety hazards.

[0004] Furthermore, the interaction design between traditional planar spiral springs and surrounding components is not refined enough. Due to the lack of effective protection and adaptation structures, the springs are prone to wear during contact and friction with other components, and may also cause scratch damage to adjacent components, affecting the stability and durability of the entire vehicle system. In addition, in some new energy vehicle applications with high requirements for lightweighting, traditional, heavier springs are not conducive to energy consumption control and range improvement.

[0005] In conclusion, given the automotive industry's trend towards high performance, lightweight design, and high reliability, there is an urgent need for comprehensive improvement and innovation of planar spiral springs to meet the growing market demand. This is the important background and original intention behind the design and development of this new type of planar spiral spring. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this utility model provides a planar spiral spring, which solves the problems mentioned in the background section.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0010] A flat spiral spring, comprising an outer spiral spring and an inner spiral spring, the flat spiral spring being composed of the outer spiral spring and the inner spiral spring in double layers, an adhesive being arranged on an outer end surface of the inner spiral spring, a sandwich structure being bonded by the adhesive, wear-resistant rubber being bonded on an outer end surface of the outer spiral spring by the adhesive, the wear-resistant rubber being provided with notched grooves at equal intervals on a bonding surface, and the wear-resistant rubber being integrally provided with protrusions on an outer end surface.

[0011] Further, the sandwich structure is one of a PAN-based carbon fiber cloth, a viscose-based carbon fiber cloth and a pitch-based carbon fiber cloth.

[0012] Further, the adhesive is a high-temperature-resistant and high-strength epoxy resin adhesive, which can maintain good adhesive performance in a wide temperature range after curing, thereby ensuring stable connection of the outer spiral spring, the inner spiral spring and corresponding components, effectively resisting vibration and impact during automobile operation and preventing peeling between layers.

[0013] Further, the outer spiral spring and the inner spiral spring are made of high-strength stainless steel sheets.

[0014] Further, the width of the wear-resistant rubber should not be greater than 50% of the width of the outer spiral spring, and the wear-resistant rubber is bonded in the middle part.

[0015] (Three) beneficial effects

[0016] Compared with the prior art, the flat spiral spring has the following beneficial effects:

[0017] The flat spiral spring has the following beneficial effects: the double-layer spring structure is matched with high-strength stainless steel sheets, the bearing capacity and stability are stronger, a larger torque and deformation amount can be borne, the risk of fatigue fracture is reduced, the sandwich structure is made of carbon fiber cloth to reduce weight and enhance strength, the automobile lightening trend is met, the high-temperature-resistant epoxy resin adhesive ensures stable connection of the layers, vibration and impact are resisted, the wear-resistant rubber, the notched grooves and the protrusions are designed to reduce wear, buffer stress and prevent displacement, the service life is prolonged, vibration noise is reduced, and the automobile operation quality, safety and comfort are comprehensively improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 is a three-dimensional structural schematic view of the utility model;

[0019] Figure 2 Fig. 4 is a wear-resistant rubber structure schematic view of the utility model.

[0020] In the figure: 1, outer spiral spring; 2, inner spiral spring; 3, adhesive; 4, sandwich structure; 5, wear-resistant rubber; 6, notched groove; 7, protrusion. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] Embodiment

[0023] As Figures 1-2 shown, the utility model discloses an embodiment proposes a plane scroll spring, including outer spring 1 and inner spring 2, and the plane scroll spring is composed of outer spring 1 and inner spring 2 double layers. This structure design increases the carrying capacity and stability of spring, compared with traditional single-layer spring, can bear greater torque and deformation, makes spring more reliable in the working process, can satisfy the high requirement of spring performance under the complex working condition of automobile.

[0024] Interlayer structure 4: be provided at the outer end surface of inner spring 2, and the material is one of PAN base carbon fiber cloth, viscose base carbon fiber cloth, pitch base carbon fiber cloth. Interlayer structure 4 is connected with inner spring 2 through adhesive 3, utilizes the characteristics of high strength and low density of carbon fiber cloth, further enhances the overall strength of spring, helps to reduce the weight of spring at the same time, meets the development trend of automobile lightening, improves the fuel economy or endurance of automobile.

[0025] Adhesive 3: adopt high-temperature-resistant, high-strength epoxy resin adhesive 3, be used for connecting outer spring 1 and wear-resistant rubber 5, inner spring 2 and interlayer structure 4 respectively. It can maintain good adhesive performance in a wide temperature range after curing, ensure the stable connection between parts, effectively resist the vibration and impact in the process of automobile operation, prevent the peeling phenomenon between layers, ensure the integrity and stability of spring structure.

[0026] Wear-resistant rubber 5: is bonded to the outer end surface of outer spring 1, and the width is not more than 50% of the width of outer spring 1 and is attached to the middle part. Its main role is to protect outer spring 1, reduce the wear and tear of spring when rubbing with surrounding parts, prolong the service life of spring, at the same time, wear-resistant rubber 5 itself has a certain elasticity, can play a buffering role, reduce the vibration and noise generated when spring works.

[0027] Notch groove 6: is provided at equal intervals on the attached surface of wear-resistant rubber 5. When the spring is stretched and deformed, the notch groove 6 can make the wear-resistant rubber 5 better adapt to the deformation of the spring, avoid the damage of the rubber due to uneven deformation, and the notch groove 6 can also play a buffering role, disperse stress, further protect the wear-resistant rubber 5 and the outer spring 1.

[0028] Ridges 7: integrally formed on the outer end face of the wear-resistant rubber 5. The ridges 7 can increase the friction between the spring and the surrounding components, prevent the spring from shifting during operation, and improve the stability of the spring during operation; at the same time, the ridges 7 can also enhance the structural strength of the wear-resistant rubber 5 to some extent, making it more durable;

[0029] When the planar spiral spring is in operation, the outer spiral spring 1 and the inner spiral spring 2 made of high-strength stainless steel sheets bear force in coordination. When the spring bears torque, the outer and inner spiral springs 1 produce elastic deformation to store energy. The sandwich structure 4, which is made of one of PAN-based carbon fiber cloth, viscose-based carbon fiber cloth, or pitch-based carbon fiber cloth, is bonded to the outer end face of the inner spiral spring 2 by a high-temperature-resistant and high-strength epoxy resin adhesive 3, thereby enhancing the strength and stability of the spring as a whole and enabling it to bear greater load. The outer end face of the outer spiral spring 1 is also bonded with wear-resistant rubber 5 by the adhesive 3, and the notch groove 6 on the bonding surface of the wear-resistant rubber 5 can provide a certain buffer when the spring is stretched and contracted, thereby reducing stress concentration. The ridges 7 on the outer end face of the wear-resistant rubber 5 can increase the friction with the surrounding components to prevent the spring from shifting. At the same time, the wear-resistant rubber 5 can also protect the outer spiral spring 1 from wear and tear, ensuring the stable operation of the spring under complex working conditions of the automobile and realizing efficient energy storage and release.

[0030] As shown in Figure 1 some embodiments, the sandwich structure 4 is one of PAN-based carbon fiber cloth, viscose-based carbon fiber cloth, or pitch-based carbon fiber cloth, which can significantly improve the performance of the planar spiral spring.

[0031] As shown in Figure 1 some embodiments, the adhesive 3 is a high-temperature-resistant and high-strength epoxy resin adhesive 3, which can maintain good bonding performance within a wide temperature range after curing, ensuring the stable connection of the outer spiral spring 1, the inner spiral spring 2, and the corresponding components, effectively resisting vibration and impact during automobile operation, and preventing peeling between layers. The three-dimensional network structure formed after curing of the adhesive 3 gives the bonding site a high strength, which can withstand greater tensile force, shear force, and other loads, ensuring that the components of the spring will not easily separate under stress.

[0032] As shown in Figure 1 some embodiments, the materials of the outer spiral spring 1 and the inner spiral spring 2 are high-strength stainless steel sheets, which enable the outer spiral spring 1 and the inner spiral spring 2 to maintain good elasticity and structural stability even when they bear large torque and deformation.

[0033] As shown in Figure 1As shown, in some embodiments, the width of the wear-resistant rubber 5 should not be greater than 50% of the width of the outer coil spring 1, and is attached to the middle part; limiting the width of the wear-resistant rubber 5 can reduce the amount of rubber, reduce the material cost, and at the same time reduce the overall weight of the spring. Under the trend of lightening the automobile, this helps to improve the fuel economy or endurance of the automobile. For new energy vehicles, every little weight reduction is of great significance, and this design realizes cost reduction and benefit increase under the premise of ensuring the function of the spring.

[0034] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included within the scope of the present application.

Claims

1. A planar scroll spring comprising an outer scroll spring (1) and an inner scroll spring (2), characterized in that: The flat spiral spring is composed of an outer spiral spring (1) and an inner spiral spring (2), the outer end surface of the inner spiral spring (2) is provided with an adhesive (3), a sandwich structure (4) is bonded by the adhesive (3), the outer end surface of the outer spiral spring (1) is bonded with wear-resistant rubber (5) by the adhesive (3), the wear-resistant rubber (5) is provided with notch grooves (6) at equal intervals on the adhering surface, and the outer end surface of the wear-resistant rubber (5) is integrally provided with a convex strip (7).

2. A planar scroll spring according to claim 1, characterized in that: The sandwich structure (4) is one of PAN-based carbon fiber cloth, viscose-based carbon fiber cloth and pitch-based carbon fiber cloth.

3. A planar volute spring according to claim 1, wherein: The adhesive (3) is a high-temperature-resistant and high-strength epoxy resin adhesive, which can maintain good adhesive performance in a wide temperature range after curing, ensure the stable connection of the outer spiral spring (1) and the inner spiral spring (2) with corresponding parts, effectively resist vibration and impact during the operation of the automobile, and prevent peeling between layers.

4. A planar scroll spring according to claim 2, wherein: The material of the outer spiral spring (1) and the inner spiral spring (2) is high-strength stainless steel sheet.

5. A planar scroll spring according to claim 1, wherein: The width of the wear-resistant rubber (5) should not be greater than 50% of the width of the outer spiral spring (1), and it is adhered to the middle part.

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