Multifunctional plate spring fixing device for motor home

Abstract

The invention relates to the technical field of motor home design and manufacturing, in particular to a multifunctional plate spring fixing device for a motor home, which comprises a plate spring pressing plate, a plate spring seat and a connecting piece, the plate spring pressing plate and the plate spring seat are located on the two sides of the plate spring respectively, the end, close to the plate spring seat, of the connecting piece is connected to the axle in a hung mode, and the other end of the connecting piece is connected with the plate spring pressing plate. The plate spring pressing plate is provided with connecting parts and a supporting part, the connecting parts are located on the two sides of the supporting part, the top faces of the connecting parts are flush with the top face of the supporting part, the connecting pieces are installed at the positions of the connecting parts, and arc-shaped parts deviating from the plate spring are arranged between the connecting parts and the supporting part. According to the invention, multifunctional integration of plate spring fixation, pipeline arrangement, damping connection and the like is realized, and the adaptability, durability and lightweight level of the device are improved, so that the overall performance and maintenance convenience of a motor home suspension system are improved.

Description

Technical Field

[0001] This invention relates to the field of RV design and manufacturing technology, and in particular to a multifunctional leaf spring fixing device for RVs. Background Technology

[0002] In the field of RV design and manufacturing, the leaf spring suspension system is a key component affecting vehicle stability and load-bearing capacity. The leaf spring mounting device, as the core component of this system, is mainly used to reliably install the leaf springs to the vehicle's underside. With the diversification of RV usage scenarios, higher requirements are being placed on the functional integration, adaptability, and durability of the mounting device.

[0003] Existing RV leaf spring fixing devices typically consist of a leaf spring pressure plate, a leaf spring seat, and U-bolts. The leaf spring pressure plate is often a rigid, integral design, which is ill-suited to the multidimensional deformation of the leaf spring under complex road conditions. This can easily lead to stress concentration in certain areas, affecting the fatigue life of the leaf spring and potentially causing premature damage to the pressure plate or related components. Furthermore, the fixing device lacks integrated wiring harness routing and shock absorber connections, resulting in a cluttered RV chassis wiring layout. Additional brackets and channels are required during installation, reducing assembly efficiency and overall reliability. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a multi-functional leaf spring fixing device for RVs, which integrates multiple functions such as leaf spring fixing, pipeline layout, and shock absorption connection, thereby improving the adaptability, durability, and lightweight level of the device, and thus improving the overall performance and maintenance convenience of the RV suspension system.

[0005] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions: A multi-functional leaf spring fixing device for RVs includes a leaf spring pressure plate, a leaf spring seat, and a connector. The leaf spring pressure plate and the leaf spring seat are located on both sides of the leaf spring. One end of the connector near the leaf spring seat is hooked onto the axle, and the other end of the connector is connected to the leaf spring pressure plate. The leaf spring pressure plate has a connecting part and a supporting part. The connecting part is located on both sides of the supporting part, and the top surface of the connecting part is flush with the top surface of the supporting part. The connector is installed at the connecting part, and there is an arc-shaped part between the connecting part and the supporting part that faces away from the leaf spring.

[0006] Optionally, the leaf spring pressure plate also has lugs located at both ends of the connection portion. The lugs are bent away from the leaf spring, with one lug for connecting a shock absorber and the other lug for connecting a lateral stabilizer bar or serving as a conduit groove.

[0007] Optionally, the connecting part is provided with a connecting hole, which is an elongated hole, and the connector is installed on the connecting hole.

[0008] Optionally, a limiting hole is provided in the middle of the support portion, and the limiting hole matches the protrusion at the bottom of the leaf spring.

[0009] Optionally, the leaf spring seat is located between the axle and the leaf spring, with the surface of the leaf spring seat in contact with the leaf spring being a plane and the surface in contact with the axle being an arc-shaped surface.

[0010] Optionally, the leaf spring seat has a U-shaped cross-section, including a bottom plate and upright plates on both sides of the bottom plate, and the upright plates have arc-shaped surfaces.

[0011] Optionally, the connector is a U-bolt, and there are two U-bolts, which are located on both sides of the leaf spring seat.

[0012] Optionally, the U-bolt has a bent rod and two side screws, the bent rod is attached to the axle, the screws are connected to the leaf spring pressure plate, and the distance between the two screws is less than the length of the leaf spring seat.

[0013] Optionally, the leaf spring seat base plate has a gap between the middle of its length direction and the leaf spring, and the base plate has a wire harness hole.

[0014] Optionally, the leaf spring pressure plate is integrally die-cast from aluminum alloy, and the leaf spring seat is machined from aluminum alloy.

[0015] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages: 1. The multi-functional leaf spring fixing device for RVs of the present invention achieves stable clamping of the leaf spring through a structure in which the leaf spring pressure plate and leaf spring seat are respectively located on both sides of the leaf spring and connected by a connector. One end of the connector is hooked to the axle, and the other end is fixed to the leaf spring pressure plate, forming a force transmission path. The top surface of the connecting part and the support part of the leaf spring pressure plate are flush, resulting in uniform force distribution. The arc-shaped part between the connecting part and the support part faces away from the leaf spring, which can provide elastic deformation space when the leaf spring is impacted, disperse stress, and reduce the risk of leaf spring fatigue. The leaf spring pressure plate as a whole serves as a pressure-bearing component, with its connecting part used for installation and fixing, its support part used for contacting the leaf spring, and its arc-shaped part acting as a buffer. The three work together to achieve a combined function of clamping and shock absorption. For example, when the RV is in motion, the leaf spring vibrates up and down, and the arc-shaped part undergoes slight deformation, absorbing some energy. This fixing device solves the problem of stress concentration in existing fixing devices and improves the impact resistance of the leaf spring.

[0016] 2. Pipeline grooves or internal pipeline channels are set on the leaf spring pressure plate. By utilizing the multi-segment space of the leaf spring pressure plate and the area around the holes, the pipeline route can be rationally planned. The originally scattered pipelines can be orderly integrated on the leaf spring pressure plate. On the one hand, it avoids the pipelines from being exposed and subjected to wear and compression, thus improving the service life of the pipelines. On the other hand, it makes the overall layout more compact, saves installation space, and facilitates later inspection and maintenance.

[0017] Advantages of additional aspects of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In addition, the dimensions or spacing between the components are exaggerated to show the position of each component, and the schematic diagrams are for illustrative purposes only.

[0019] Figure 1 This is a perspective view of the fixing device provided in an embodiment of the present invention; Figure 2 This is a front view of the fixing device provided in an embodiment of the present invention; Figure 3 This is a side view of the fixing device provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the leaf spring pressure plate provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the leaf spring seat provided in an embodiment of the present invention; In the diagram: 1. Axle; 2. Connecting component; 3. Leaf spring seat; 31. Base plate; 32. Vertical plate; 4. Leaf spring pressure plate; 41. Roller lug; 42. Connecting part; 43. Support part; 5. Shock absorber; Detailed Implementation It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0020] like Figure 1 , Figure 2 , Figure 3 As shown, this embodiment proposes a multi-functional leaf spring fixing device for RVs, including a leaf spring pressure plate 4, a leaf spring seat 3, and a connecting member 2; the leaf spring pressure plate 4 and the leaf spring seat 3 are respectively located on both sides of the leaf spring, one end of the connecting member 2 near the leaf spring seat 3 is hooked onto the axle 1, and the other end of the connecting member 2 is connected to the leaf spring pressure plate 4; as shown Figure 4As shown, the leaf spring pressure plate 4 has a connecting part 42 and a supporting part 43. The connecting part 42 is located on both sides of the supporting part 43, and the top surface of the connecting part 42 is flush with the top surface of the supporting part 43. The connecting member 2 is installed at the position of the connecting part 42. There is an arc-shaped part between the connecting part 42 and the supporting part 43 that is away from the leaf spring.

[0021] The leaf spring seat 3 is located between the axle 1 and the leaf spring, while the leaf spring pressure plate 4 is located on the side of the leaf spring away from the axle 1. These three elements form an upper and lower clamping structure for the leaf spring, providing stable support from both sides. One end of the connector 2 is attached to the axle 1, and the other end is connected to the leaf spring pressure plate 4, enhancing overall stability. The connecting portion 42 of the leaf spring pressure plate 4 is located on both sides of the support portion 43, with their top surfaces flush. This ensures that when the connector 2 is installed on the connecting portion 42, the pressure exerted by the leaf spring pressure plate 4 on the leaf spring can be evenly transmitted to the leaf spring surface through the support portion 43 and / or the connecting portion 42, preventing excessive local pressure that could cause leaf spring deformation. The arc-shaped portion between the connecting portion 42 and the support portion 43, away from the leaf spring, provides a certain degree of deformation buffering when the leaf spring pressure plate 4 is under stress, dispersing stress concentration and preventing the leaf spring pressure plate 4 from breaking due to excessive rigidity.

[0022] This fixing device solves the problems of unstable clamping of leaf springs and easy damage to components due to stress concentration. Among them, the leaf spring seat 3, leaf spring pressure plate 4 and connecting piece 2 form a clamping system. With the cushioning of the arc-shaped part of the leaf spring pressure plate 4, the overall working stability of the leaf spring under complex working conditions is improved, and the service life of the leaf spring and the fixing device is extended.

[0023] like Figure 4 As shown, the leaf spring pressure plate 4 also has a lug 41, which is located at both ends of the connecting part 42. The lug 41 bends away from the leaf spring. One lug 41 is used to connect the shock absorber 5, and the other lug 41 is used to connect the lateral stabilizer bar or as a pipeline groove.

[0024] The design of the position and orientation of the lug 41 avoids interference between the lug 41 and the leaf spring during operation, ensuring that the normal deformation of the leaf spring is not affected. One lug 41 is used to connect the shock absorber 5, and the other can be connected to the lateral stabilizer bar or used as a pipeline groove, solving the problem of the single function of traditional leaf spring fixing devices.

[0025] Traditional mounting systems can only fix the leaf spring; the shock absorber 5 and the lateral stabilizer bar require additional brackets for installation. This not only occupies chassis space but may also cause interference between components due to improper bracket layout. This mounting system integrates the coil lug 41 with the leaf spring pressure plate 4, achieving connection between the shock absorber 5 and the lateral stabilizer bar without additional brackets, reducing the number of chassis components and optimizing the chassis layout. When the coil lug 41 is used as a cable tray, the RV's system wiring harness and other cables can pass through its interior, preventing them from being exposed to dust, stones, or friction damage from vehicle vibrations.

[0026] After the lug 41 connects to the shock absorber 5, it enables the shock absorber 5 and the leaf spring to form a collaborative working system. When the leaf spring buffers the main vibrations, the shock absorber 5 can quickly transmit damping force through the lug 41, improving the overall shock absorption effect of the suspension and improving the ride stability of the RV. When connected to the stabilizer bar, the lug 41 can transmit the force of the stabilizer bar to the leaf spring pressure plate 4, which in turn acts on the leaf spring, improving driving safety and making up for the shortcomings of traditional fixing devices that cannot work together with other suspension components to improve performance.

[0027] The connecting part 42 has a connecting hole, which is an oblong hole, and the connecting member 2 is installed on the connecting hole.

[0028] The elongated hole differs from the traditional circular connecting hole in that its length is greater than its width, providing an adjustment margin for the installation position of the connector 2. This allows the same leaf spring pressure plate 4 to be adapted to various leaf spring specifications, reducing replacement costs caused by differences in leaf spring specifications.

[0029] The support part 43 has a limiting hole in the middle, and the limiting hole matches the protrusion at the bottom of the leaf spring.

[0030] The shape and size of the limiting hole are designed according to the actual shape of the protrusion at the bottom of the leaf spring, allowing the protrusion to be fully embedded in the limiting hole and avoiding point or line contact between the protrusion and the surface of the support part 43. At the same time, the matching of the limiting hole and the leaf spring protrusion restricts the horizontal displacement of the leaf spring and the leaf spring pressure plate 4, and the hole wall provides lateral restraint, forming a double fixation of the leaf spring in both the vertical and horizontal directions, further improving the fixation stability. In addition, the opening of the limiting hole can also reduce the overall weight of the leaf spring pressure plate 4, achieving lightweighting while ensuring strength, which meets the requirements of RVs for component weight reduction.

[0031] In this embodiment, the leaf spring pressure plate 4 has a multi-segment structure, achieving differentiated elastic deformation in different stress areas. Compared with the traditional integral rigid leaf spring pressure plate 4, the multi-segment structure can better adapt to the deformation of the leaf spring under complex working conditions, reduce stress concentration, and extend the service life of the leaf spring and the leaf spring pressure plate 4 itself.

[0032] The multiple holes distributed on the leaf spring pressure plate 4 can, on the one hand, reduce the overall weight of the leaf spring pressure plate 4 and achieve a lightweight design; on the other hand, it can achieve more flexible installation and positioning, making it convenient to combine and install with leaf springs and other components of different specifications.

[0033] The rolled ears 41 on both sides of the leaf spring pressure plate 4 can form a softer contact between the leaf spring pressure plate 4 and other connecting parts 42 (vibration dampers, lateral stabilizer bars, etc.), reducing stress concentration damage to the surface of the components. At the same time, the rolled ends may play a guiding role to a certain extent, facilitating the quick positioning of the leaf spring pressure plate 4 during installation and improving assembly efficiency.

[0034] The leaf spring pressure plate 4 is equipped with pipeline grooves or internal pipeline channels. By utilizing the multi-segment space of the leaf spring pressure plate 4 and the surrounding area of ​​the holes, the pipeline route can be rationally planned. The originally scattered pipelines (such as hydraulic pipes, signal lines, etc.) can be orderly integrated on the leaf spring pressure plate 4. On the one hand, it avoids the pipelines from being exposed and subjected to wear and compression, thus improving the service life of the pipelines. On the other hand, it makes the overall layout more compact, saves installation space, and facilitates later inspection and maintenance.

[0035] The leaf spring seat 3 is located between the axle 1 and the leaf spring. The surface of the leaf spring seat 3 that contacts the leaf spring is a plane, and the surface that contacts the axle 1 is an arc-shaped surface.

[0036] The axle 1 has a cylindrical structure, and its arc-shaped surface can fit tightly with the outer circular surface of the axle 1. The arc-shaped surface has a larger contact area and a higher degree of fit, so that the load transmitted by the axle 1 is evenly distributed on the leaf spring seat 3, reducing the deformation caused by excessive local stress on the leaf spring seat 3.

[0037] like Figure 5 As shown, the leaf spring seat 3 has a U-shaped cross-section, including a bottom plate 31 and upright plates 32 on both sides of the bottom plate 31. The upright plates 32 have arc-shaped surfaces. The bottom plate 31 provides stable bottom support, and the upright plates 32 on both sides enhance the lateral stiffness of the leaf spring seat 3. The arc-shaped surfaces of the upright plates 32 increase the contact area between the leaf spring seat 3 and the axle 1, improving the fit. At the same time, the upright plates 32 can limit the axle 1 from both sides, forming a surrounding support for the axle 1, improving the connection stability between the axle 1 and the leaf spring seat 3.

[0038] The connecting component 2 is a U-bolt, and there are two U-bolts, which are located on both sides of the leaf spring seat 3. The two U-bolts are located on both sides of the leaf spring seat 3, and can clamp and fix it from both sides of the leaf spring seat 3.

[0039] The U-bolt has a bent rod and two screws on both sides. The bent rod is attached to the axle 1, and the screws are connected to the leaf spring pressure plate 4. The distance between the two screws is less than the length of the leaf spring seat 3.

[0040] The curved rod serves as the connection point between the U-bolt and axle 1. Its arc-shaped design allows it to fit snugly against axle 1, ensuring a secure connection. The screw portion connects to the leaf spring pressure plate 4, and the leaf spring pressure plate 4 is clamped to the leaf spring seat 3 by tightening the nut. The design that the distance between the two screws is less than the length of the leaf spring seat 3 allows the screw portion of the U-bolt to axially limit the movement of the leaf spring seat 3.

[0041] The combination of the bending rod hooking, the screw clamping, and the screw spacing limiting not only achieves stable fixing of the leaf spring, but also restricts the axial displacement of the leaf spring seat 3. Combined with the U-shaped structure of the leaf spring seat 3 and the arc-shaped surface of the upright plate 32, the connection between the leaf spring seat 3 and the axle 1 and the leaf spring is more compact, and the overall stability of the structure is greatly improved.

[0042] The leaf spring seat 3 has a gap between the middle of the base plate 31 along its length and the leaf spring, and the base plate 31 has a wire harness hole.

[0043] The gap between the center of the base plate 31 and the leaf spring, along with the wiring harness holes on the base plate 31, is used to arrange the RV's system wiring harness. This avoids exposed wiring, optimizes the neatness of the wiring layout in the RV chassis, and also reduces the installation cost of additional wiring structures. For example, it can be used to run sensor signal wires and suspension system wiring harnesses, preventing exposed wiring from being interfered with and optimizing the neatness of the wiring layout in the RV chassis.

[0044] The hole design of the leaf spring seat 3 takes into account both versatility and lightweight design, and also increases the heat dissipation area of ​​the leaf spring seat 3, which can accelerate the heat dissipation of the contact area between the leaf spring and the leaf spring seat 3 (such as the heat generated by the vibration and friction of the leaf spring), and avoid excessive local temperature leading to a decline in material performance.

[0045] The leaf spring pressure plate 4 is made of one-piece die-cast aluminum alloy, and the leaf spring seat 3 is machined from aluminum alloy. Compared with traditional steel, aluminum alloy has the characteristics of low density and light weight. Using aluminum alloy can effectively reduce the weight of leaf spring pressure plate 4 and leaf spring seat 3, thereby reducing the overall weight of the RV. The leaf spring pressure plate 4 is made of 6061-T6 aluminum alloy using a one-piece die-casting process, which can ensure the overall structural integrity of leaf spring pressure plate 4, avoid the weak points that may exist in spliced ​​structures, improve the structural strength and fatigue resistance of leaf spring pressure plate 4, and at the same time, one-piece die casting can also ensure the consistency of product dimensions, which is convenient for mass production. The leaf spring seat 3 is machined from aluminum alloy, which can precisely control the size and shape of leaf spring seat 3 according to design requirements, and improve the fit between leaf spring seat 3 and other components.

[0046] In summary, this fixing device is compatible with leaf springs of different specifications, meeting diverse installation needs, improving the device's versatility, and reducing replacement costs due to differences in leaf spring specifications. Through multiple fixing structures, the leaf springs are stably and securely fixed, effectively preventing displacement or loosening during vehicle operation and ensuring stable operation of the leaf springs and suspension system. The fixing device works in conjunction with other suspension damping components to optimize leaf spring stress, enhance the overall suspension damping effect, and improve vehicle ride stability and comfort. High-strength, wear-resistant materials are selected, and each structural design considers fatigue and deformation resistance, extending the service life of the device itself and the fixed leaf springs. The simple structural design and easy installation steps facilitate subsequent maintenance, including convenient inspection, adjustment of the leaf springs, and replacement of device components, reducing usage and maintenance costs.

[0047] While the specific embodiments of the present invention have been described above, they are not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A multi-functional leaf spring fixing device for RVs, used to fix leaf springs to the bottom of the axle, characterized in that, The fixing device includes a leaf spring pressure plate, a leaf spring seat, and connecting parts; The leaf spring pressure plate and leaf spring seat are located on both sides of the leaf spring, and one end of the connector near the leaf spring seat is hooked onto the axle, while the other end of the connector is connected to the leaf spring pressure plate. The leaf spring pressure plate has a connecting part and a supporting part. The connecting part is located on both sides of the supporting part, and the top surface of the connecting part is flush with the top surface of the supporting part. The connecting member is installed at the connecting part. There is an arc-shaped part between the connecting part and the supporting part that is away from the leaf spring.

2. The multi-functional leaf spring fixing device for RVs as described in claim 1, characterized in that, The leaf spring pressure plate also has lugs located at both ends of the connecting part. The lugs are bent away from the leaf spring. One lug is used to connect to the shock absorber, and the other lug is used to connect to the lateral stabilizer bar or as a conduit groove.

3. The multi-functional leaf spring fixing device for RVs as described in claim 1, characterized in that, The connecting part has a connecting hole, which is an oblong hole, and the connector is installed on the connecting hole.

4. The multi-functional leaf spring fixing device for RVs as described in claim 1, characterized in that, A limiting hole is provided in the middle of the support part, and the limiting hole matches the protrusion at the bottom of the leaf spring.

5. The multi-functional leaf spring fixing device for RVs as described in claim 1, characterized in that, The leaf spring seat is located between the axle and the leaf spring. The surface of the leaf spring seat that contacts the leaf spring is a plane, and the surface that contacts the axle is an arc-shaped surface.

6. The multi-functional leaf spring fixing device for RVs as described in claim 5, characterized in that, The leaf spring seat has a U-shaped cross-section, including a bottom plate and upright plates on both sides of the bottom plate, and the upright plates have arc-shaped surfaces.

7. The multi-functional leaf spring fixing device for RVs as described in claim 6, characterized in that, The connector is a U-bolt, and there are two U-bolts, which are located on both sides of the leaf spring seat.

8. The multi-functional leaf spring fixing device for RVs as described in claim 7, characterized in that, The U-bolt has a bent rod and two screws on both sides. The bent rod is attached to the axle, and the screws are connected to the leaf spring pressure plate. The distance between the two screws is less than the length of the leaf spring seat.

9. The multi-functional leaf spring fixing device for RVs as described in claim 6, characterized in that, The leaf spring seat base plate has a gap between the leaf spring and the middle of its length direction, and the base plate has a wire harness hole.

10. The multi-functional leaf spring fixing device for RVs as described in claim 1, characterized in that, The leaf spring pressure plate is integrally die-cast from aluminum alloy, and the leaf spring seat is machined from aluminum alloy.

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