A composite material double leaf spring assembly for a vehicle

Abstract

The utility model embodiment provides a kind of double leaf spring of composite material for vehicle, including main spring body, auxiliary spring body, upper clamping plate, intermediate clamping plate, lower clamping plate, eyelet, eyelet gasket, auxiliary spring end clamp and end clamp gasket;Main spring body is specifically curved plate, auxiliary spring body is specifically curved plate;Upper clamping plate is specifically rectangular flat plate, intermediate clamping plate is specifically rectangular flat plate, lower clamping plate is specifically rectangular flat plate, and upper clamping plate, auxiliary spring body, intermediate clamping plate, main spring body and lower clamping plate are fixedly connected by center bolt;Auxiliary spring end clamp is specifically rectangular flat plate, and end clamp gasket is specifically rectangular flat plate, and auxiliary spring end clamp, auxiliary spring body and end clamp gasket are sequentially fixedly connected by internal hexagon countersunk head bolt;Wherein, main spring body and auxiliary spring body are made of glass fiber reinforced epoxy resin / polyurethane resin material, and are made by Prepreg Compression Molding (PCM) process.Compared with prior art, the double leaf spring assembly of composite material for vehicle in the embodiment can effectively reduce the weight of leaf spring.

Description

Technical Field

[0001] This utility model relates to the field of automotive technology, and in particular to a composite material double leaf spring assembly for automobiles. Background Technology

[0002] Lightweighting of automobiles is a current trend in automotive development. Lightweighting can not only reduce fuel consumption and pollution, but also endow automobiles with other properties, which can help improve the acceleration and control stability of automobiles, and have a positive effect on reducing automobile noise, vibration, inertia during collisions and braking distance.

[0003] Automotive leaf springs are the most traditional elastic element in automotive suspension systems. They are typically composed of several alloy spring steel leaves of unequal length, forming a spring beam of approximately equal strength. In addition to their cushioning function, when mounted longitudinally in the suspension system and hinged at one end to the chassis, they transmit forces and torques in all directions and determine the trajectory of the wheels, thus acting as a guide. Therefore, there is no need for other guiding mechanisms. Furthermore, since automotive leaf springs are composed of multiple stacked leaves, when deformed under load, the leaves slide relative to each other, generating friction and producing resistance, which helps to dampen vehicle vibrations. Therefore, this structure eliminates the need for shock absorbers.

[0004] However, the current leaf spring material is alloy steel, which has low material utilization and is heavy, accounting for 8 to 9% of the car's weight.

[0005] In view of this, there is a lack of lightweight automotive leaf springs in the existing technology. Utility Model Content

[0006] The purpose of this utility model embodiment is to provide a lightweight automotive composite material double leaf spring assembly to overcome the shortcomings of the prior art. The specific technical solution is as follows:

[0007] A composite material double leaf spring assembly for automobiles includes a main spring body, a secondary spring body, an upper clamping plate, an intermediate clamping plate, a lower clamping plate, a coil lug, a coil lug washer, a secondary spring end clamp, and an end clamp washer.

[0008] The main spring body is specifically a curved plate, and the auxiliary spring body is specifically a curved plate;

[0009] The upper clamping plate is specifically a rectangular flat plate, the middle clamping plate is specifically a rectangular flat plate, and the lower clamping plate is specifically a rectangular flat plate. The upper clamping plate, the auxiliary spring body, the middle clamping plate, the main spring body, and the lower clamping plate are fixedly connected by a central bolt.

[0010] A first vulcanized rubber metal plate and a first nylon plate are sequentially arranged between the upper clamping plate and the auxiliary spring body; a second nylon plate and a second vulcanized rubber metal plate are sequentially arranged between the auxiliary spring body and the middle clamping plate; a third vulcanized rubber metal plate and a third nylon plate are sequentially arranged between the middle clamping plate and the main spring body; and a fourth nylon plate and a fourth vulcanized rubber metal plate are sequentially arranged between the main spring body and the lower clamping plate.

[0011] The ear roll pad is specifically a rectangular flat plate, and the ear roll, the main spring body, and the ear roll pad are sequentially fixedly connected by hexagonal head bolts;

[0012] The auxiliary spring end clamp is specifically a rectangular plate, the end clamp gasket is specifically a rectangular plate, and the auxiliary spring end clamp, the auxiliary spring body and the end clamp gasket are sequentially fixedly connected by internal hexagon countersunk bolts;

[0013] The main spring body and the auxiliary spring body are made of glass fiber reinforced epoxy resin / polyurethane resin material and are manufactured by prepreg compression molding (PCM) process.

[0014] Optionally, the upper clamping plate and the middle clamping plate are located at the middle position of the auxiliary spring body, the middle clamping plate and the lower clamping plate are located at the middle position of the main spring body, the auxiliary spring end clamp and the auxiliary spring washer are located at both ends of the auxiliary spring body, and the coiled ear and the coiled ear washer are located at both ends of the main spring body.

[0015] Optionally, the number of the center bolt is 1, the number of the hexagonal head bolts is 8, and the number of the internal hexagon countersunk head bolts is 4.

[0016] Optionally, the main spring body is specifically a parabolic curved plate with a variable cross-section, the secondary spring body is specifically a parabolic curved plate with a variable cross-section, and the main spring body and the secondary spring body are specifically spring beams of equal strength, so as to make full use of the material properties.

[0017] Compared with existing technologies, the automotive composite double leaf spring assembly in this embodiment is made of glass fiber reinforced epoxy resin / polyurethane resin, which can effectively reduce the weight of the leaf spring. Furthermore, in this embodiment, the sequential arrangement of a first vulcanized rubber metal plate and a first nylon plate between the upper clamping plate and the auxiliary spring body, a second nylon plate and a second vulcanized rubber metal plate between the auxiliary spring body and the intermediate clamping plate, a third vulcanized rubber metal plate and a third nylon plate between the intermediate clamping plate and the main spring body, and a fourth nylon plate and a fourth vulcanized rubber metal plate between the main spring body and the lower clamping plate effectively increases the service life and strength of the leaf spring and reduces the torque attenuation of the U-bolts after vehicle installation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of an embodiment of the automotive composite material double leaf spring assembly provided by this utility model;

[0020] Figure 2 This is a top view structural schematic diagram of an embodiment of the automotive composite material double leaf spring assembly provided by this utility model.

[0021] Figure 3 This is a partial structural schematic diagram of an embodiment of the automotive composite material double leaf spring assembly provided by this utility model.

[0022] in, Figures 1 to 3 The correspondence between the component names and their corresponding reference numerals in the figures is as follows:

[0023] 1. Main spring body, 2. Secondary spring body, 3. Upper clamping plate, 4. Middle clamping plate, 5. Lower clamping plate, 6. Coil lug, 7. Coil lug washer, 8. Secondary spring end clamp, 9. Secondary spring washer, 10. First vulcanized rubber metal plate, 11. First nylon plate, 12. Second nylon plate, 13. Second vulcanized rubber metal plate, 14. Third vulcanized rubber metal plate, 15. Third nylon plate, 16. Fourth nylon plate, 17. Fourth vulcanized rubber metal plate, 18. Center bolt, 19. Hex head bolt, 20. Socket head countersunk bolt. Detailed Implementation

[0024] 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.

[0025] It should be noted that in this embodiment, the directional terms "up" and "down," "left" and "right" are based on... Figure 1 The position of the automotive composite double leaf spring assembly embodiment shown is defined based on the position.

[0026] It should be understood that although the terms "first," "second," "third," "fourth," etc., may be used herein to describe various vulcanized rubber metal sheets and nylon sheets, these vulcanized rubber metal sheets and nylon sheets should not be limited by these terms. These terms are used merely to distinguish one vulcanized rubber metal sheet from another, and one nylon sheet from another. For example, without departing from the scope of the exemplary embodiments, a first vulcanized rubber metal sheet may be referred to as a second vulcanized rubber metal sheet, and similarly, a second vulcanized rubber metal sheet may be referred to as a first vulcanized rubber metal sheet. Similarly, a first nylon sheet may be referred to as a second nylon sheet, and similarly, a second nylon sheet may be referred to as a first nylon sheet. The term "and / or" as used herein includes any and all combinations of one or more of the associated items listed.

[0027] To understand the specific structure of the automotive composite material double leaf spring assembly in this embodiment, please refer to the following: Figures 1 to 3 . Figure 1 A schematic diagram of an embodiment of the automotive composite material double leaf spring assembly provided by this utility model; Figure 2 A top view structural schematic diagram of an embodiment of the automotive composite material double leaf spring assembly provided by this utility model; Figure 3 This is a partial structural schematic diagram of an embodiment of the automotive composite material double leaf spring assembly provided by this utility model. Figures 1 to 3As shown, the automotive composite double leaf spring assembly provided in this embodiment includes a main spring body 1, a secondary spring body 2, an upper clamping plate 3, an intermediate clamping plate 4, a lower clamping plate 5, a coiled ear 6, a coiled ear washer 7, a secondary spring end clamp 8, an end clamp washer 9, a first vulcanized rubber metal plate 10, a first nylon plate 11, a second nylon plate 12, a second vulcanized rubber metal plate 13, a third vulcanized rubber metal plate 14, a third nylon plate 15, a fourth nylon plate 16, a fourth vulcanized rubber metal plate 17, a center bolt 18, a hexagonal head bolt 19, and a countersunk hexagonal head bolt 20. Specifically, the main spring body 1 is a curved plate, the secondary spring body 2 is a curved plate, the upper clamping plate 3 is a rectangular flat plate, the intermediate clamping plate 4 is a rectangular flat plate, and the lower clamping plate 5 is a rectangular flat plate. The upper clamping plate 3, the secondary spring body 2, the intermediate clamping plate 4, the main spring body 1, and the lower clamping plate 5... The spring is fixedly connected by a central bolt 18; a first vulcanized rubber metal plate 10 and a first nylon plate 11 are sequentially arranged between the upper clamping plate 3 and the auxiliary spring body 2; a second nylon plate 12 and a second vulcanized rubber metal plate 13 are sequentially arranged between the auxiliary spring body 2 and the intermediate clamping plate 4; a third vulcanized rubber metal plate 14 and a third nylon plate 15 are sequentially arranged between the intermediate clamping plate 4 and the main spring body 1; and a fourth nylon plate 16 and a fourth vulcanized rubber metal plate 17 are sequentially arranged between the main spring body 1 and the lower clamping plate 5; the ear washer 7 is specifically a rectangular flat plate, and the ear 6, the main spring body 1, and the ear washer 7 are sequentially fixedly connected by hexagonal head bolts 19; the auxiliary spring end clamp 8 is specifically a rectangular flat plate, and the end clamp washer 9 is specifically a rectangular flat plate, and the auxiliary spring end clamp 8, the auxiliary spring body 2, and the end clamp washer 9 are sequentially fixedly connected by internal hexagonal countersunk head bolts 20;

[0028] The main spring body 1 and the auxiliary spring body 2 are made of glass fiber reinforced epoxy resin / polyurethane resin material, manufactured through prepreg compression molding (PCM) process. PCM uses equipment pressure as the main force to cure and impregnate fiber strips and fiber fabrics through a mold, continuously manufacturing composite leaf springs with different cross-sectional shapes. This process can meet the current production needs of leaf springs with different cross-sections. The products are dense, have a smooth surface, and excellent performance, facilitating the industrial production of automotive products.

[0029] Specifically, the first nylon plate 11, the second nylon plate 12, the third nylon plate 15, and the fourth nylon plate 16 are all rectangular plates with a central opening, made of polyamide fiber material and manufactured using the PCM process; the first vulcanized rubber metal plate 10, the second vulcanized rubber metal plate 13, the third vulcanized rubber metal plate 14, and the fourth vulcanized rubber metal plate 17 are all rectangular plates with chamfers, manufactured by fixing vulcanized rubber to the metal plate; each nylon plate and each vulcanized rubber metal plate can further increase the service life and strength of the main spring body 1 and the auxiliary spring body 2.

[0030] Preferably, to fully utilize the material properties, the main spring body 1 is specifically a parabolic curved plate with a variable cross-section, and the auxiliary spring body 2 is specifically a parabolic curved plate with a variable cross-section. Furthermore, both the main spring body 1 and the auxiliary spring body 2 are specifically spring beams of equal strength.

[0031] Specifically, in this embodiment, the upper clamping plate 3 and the middle clamping plate 4 are positioned in the middle of the auxiliary spring body 2, the middle clamping plate 4 and the lower clamping plate 5 are positioned in the middle of the main spring body 1, the auxiliary spring end clamp 8 and the end clamping washer 9 are positioned at both ends of the auxiliary spring body 2, and the coil lug 6 and the coil lug washer 7 are positioned at both ends of the main spring body 1. See also Figure 1 After the upper clamping plate 3, the auxiliary spring body 2, the intermediate clamping plate 4, the main spring body 1, and the lower clamping plate 5 are fixedly connected by the central bolt 18, the central axis of symmetry of the auxiliary spring body 2 coincides with the central axis of symmetry of the upper clamping plate 3 and the intermediate clamping plate 4, and the central axis of symmetry of the main spring body 1 coincides with the central axis of symmetry of the intermediate clamping plate 4 and the lower clamping plate 5. More specifically, in this embodiment, the length of the upper clamping plate 3 is 160mm, the length of the intermediate clamping plate 4 is 160mm, and the length of the lower clamping plate 5 is 160mm.

[0032] See Figure 2 In this embodiment, the number of hexagonal head bolts 19 used to fix the connecting lug 6, main spring body 1, and lug washer 7 is specifically eight, with four evenly distributed at each of the left and right ends of the main spring body 1. Preferably, to further increase the connection strength between the lug 6, main spring body 1, and lug washer 7, both adhesive bonding and hexagonal head bolts can be used for fixing.

[0033] See Figure 2 In this embodiment, the number of hexagonal countersunk head bolts 20 used to fix the auxiliary spring end clip 8, the auxiliary spring body 2, and the end clip washer 9 is specifically four, with two evenly distributed at each of the left and right ends of the auxiliary spring body 2. Preferably, to further increase the connection strength between the auxiliary spring end clip 8, the auxiliary spring body 2, and the end clip washer 9, both adhesive bonding and hexagonal head bolts can be used for fixing.

[0034] In this embodiment, the upper clamping plate 3, the auxiliary spring body 2, the middle clamping plate 4, the main spring body 1, and the lower clamping plate 5 are fixedly connected by a central bolt 18. To further increase the connection strength between the upper clamping plate 3, the auxiliary spring body 2, the middle clamping plate 4, the main spring body 1, and the lower clamping plate 5, both adhesive bonding and central bolts can be used for fixed connection.

[0035] Compared with existing technologies, the overall structure of the automotive composite double leaf spring in this embodiment is made of glass fiber reinforced epoxy resin / polyurethane resin, which can reduce weight by 50%-60% compared with metal leaf springs, effectively reducing the weight of the leaf spring. Furthermore, in this embodiment, the sequential arrangement of a first vulcanized rubber metal plate and a first nylon plate between the upper clamping plate and the auxiliary spring body, a second nylon plate and a second vulcanized rubber metal plate between the auxiliary spring body and the intermediate clamping plate, a third vulcanized rubber metal plate and a third nylon plate between the intermediate clamping plate and the main spring body, and a fourth nylon plate and a fourth vulcanized rubber metal plate between the main spring body and the lower clamping plate effectively increases the service life and strength of the leaf spring and reduces the torque attenuation of the U-bolts after installation.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A composite material double leaf spring assembly for automobiles, characterized in that, Includes main spring body (1), auxiliary spring body (2), upper clamping plate (3), middle clamping plate (4), lower clamping plate (5), coiled ear (6), coiled ear gasket (7), auxiliary spring end clamp (8), end clamp gasket (9), first vulcanized rubber metal plate (10), first nylon plate (11), second nylon plate (12), second vulcanized rubber metal plate (13), third vulcanized rubber metal plate (14), third nylon plate (15), fourth nylon plate (16), fourth vulcanized rubber metal plate (17), center bolt (18), hexagonal head bolt (19), and internal hexagonal countersunk head bolt (20); The main spring body (1) is specifically a curved plate, and the auxiliary spring body (2) is specifically a curved plate; The upper clamping plate (3) is specifically a rectangular plate, the middle clamping plate (4) is specifically a rectangular plate, the lower clamping plate (5) is specifically a rectangular plate, and the upper clamping plate (3), the auxiliary spring body (2), the middle clamping plate (4), the main spring body (1) and the lower clamping plate (5) are fixedly connected by a central bolt (18). A first vulcanized rubber metal plate (10) and a first nylon plate (11) are sequentially arranged between the upper clamping plate (3) and the auxiliary spring body (2); a second nylon plate (12) and a second vulcanized rubber metal plate (13) are sequentially arranged between the auxiliary spring body (2) and the intermediate clamping plate (4); a third vulcanized rubber metal plate (14) and a third nylon plate (15) are sequentially arranged between the intermediate clamping plate (4) and the main spring body (1); and a fourth nylon plate (16) and a fourth vulcanized rubber metal plate (17) are sequentially arranged between the main spring body (1) and the lower clamping plate (5). The ear pad (7) is specifically a rectangular flat plate. The ear (6), the main spring body (1) and the ear pad (7) are sequentially fixedly connected by hexagonal head bolts (19). The auxiliary spring end clamp (8) is specifically a rectangular plate, and the end clamp gasket (9) is specifically a rectangular plate. The auxiliary spring end clamp (8), the auxiliary spring body (2), and the end clamp gasket (9) are sequentially fixedly connected by internal hexagon countersunk bolts (20).

2. The automotive composite material double leaf spring assembly according to claim 1, characterized in that, The upper clamping plate (3) and the middle clamping plate (4) are located in the middle of the secondary spring body (2), the middle clamping plate (4) and the lower clamping plate (5) are located in the middle of the main spring body (1), the secondary spring end clamp (8) and the end clamping pad (9) are located at both ends of the secondary spring body (2), and the coiled ear (6) and the coiled ear pad (7) are located at both ends of the main spring body (1).

3. The automotive composite material double leaf spring assembly according to claim 2, characterized in that, The number of the center bolt (18) is specifically 1, the number of the hexagonal head bolts (19) is specifically 8, and the number of the internal hexagon countersunk head bolts (20) is specifically 4.

4. The automotive composite material double leaf spring assembly according to claim 3, characterized in that, The main spring body (1) is specifically a parabolic curved plate with a variable cross section, and the secondary spring body (2) is specifically a parabolic curved plate with a variable cross section. The main spring body (1) and the secondary spring body (2) are specifically spring beams of equal strength, so as to give full play to the material properties.

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