Embeddedly assembled leaf spring body, leaf spring body fitting, and leaf spring assembly
By incorporating the top plate, bottom plate, and side plates into the composite material leaf spring body, the integrity issue of the leaf spring body when fixed with U-bolts is resolved, thereby improving service life and safety and reducing maintenance frequency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XIAN LIANRUI TECH IND CO LTD
- Filing Date
- 2023-07-14
- Publication Date
- 2026-07-24
Smart Images
Figure CN116691251B_ABST
Abstract
Description
Technical Field
[0001] This application relates to suspensions for automobiles, and more specifically, to an embedded-mount leaf spring body, leaf spring body fittings, and leaf spring assembly. Background Technology
[0002] Composite materials, as materials for automotive leaf springs, have been extensively studied by many automakers in recent years and have also been commercially applied in some models.
[0003] However, since the reinforcing material of composite leaf springs is usually fiber filaments or fiber bundles, the mechanical properties of the leaf spring body are good in the direction of fiber or fiber bundle extension, but poor in the direction perpendicular to the extension. In particular, since the middle part of the leaf spring body needs to be fixed to the frame with U-bolts, overtightening the U-bolts will damage the integrity of the leaf spring body and reduce its service life.
[0004] To address the aforementioned issues, a top plate and a bottom plate can be installed in the middle of the leaf spring body, and a side plate can be installed between the top plate and the bottom plate to control the distance between them. When the middle of the leaf spring body is fixed to the frame with U-bolts, the distance between the top plate and the bottom plate can be controlled by the side plate, thereby preventing the U-bolts from being installed too tightly, ensuring the integrity of the leaf spring body and improving its service life.
[0005] Normally, the top plate, bottom plate, and side plates are fixed to the leaf spring body using fasteners (such as bolts) or adhesive. However, fixing the top plate, bottom plate, and side plates to the leaf spring body with fasteners can damage the structure of the leaf spring body, thus reducing its service life. When fixing the top plate, bottom plate, and side plates to the leaf spring body with adhesive, during product testing, the adhesive between the side plates and the leaf spring body is prone to tearing. If the side plate detaches from the leaf spring body, it can even lead to loosening of the fixation between the leaf spring body and the frame. This not only increases the frequency of maintenance of the leaf spring body but also increases safety hazards. Summary of the Invention
[0006] This application provides an embedded assembly of a leaf spring body, leaf spring body accessories, and leaf spring assembly, which can reduce the maintenance frequency of the leaf spring body and ensure the safety of using the leaf spring body while ensuring its service life.
[0007] In a first aspect, this application provides an embedded leaf spring body, the leaf spring body having a parabolic structure, the convex surface of the parabolic structure being the upper surface of the leaf spring body, and the concave surface of the parabolic structure being the lower surface of the leaf spring body; along the length direction of the leaf spring body, a top plate is provided in the middle region of the upper surface and a bottom plate is provided in the middle region of the lower surface, and a side plate is provided on the side surface of the leaf spring body that is perpendicular to the width direction of the leaf spring body; wherein, the top plate and / or the bottom plate serve as limiting plates for the side plate, used to restrict or control the movement of the side plate along the width direction.
[0008] Secondly, this application provides an embedded-assembly leaf spring body accessory, comprising:
[0009] The top plate, bottom plate, and side plates are assembled according to the leaf spring body provided in the first aspect.
[0010] Thirdly, a leaf spring assembly is provided, comprising:
[0011] According to the leaf spring body provided in the first aspect, both ends of the leaf spring body are nested on the leaf spring seat, the leaf spring seat is fixedly connected to the vehicle frame, and the middle part of the leaf spring body is fixed to the axle by a U-bolt.
[0012] Fourthly, a leaf spring assembly is provided, comprising:
[0013] According to the leaf spring body provided in the first aspect, metal lugs are fixedly provided at both ends of the leaf spring body, the metal lugs are fixedly connected to the vehicle frame, and the middle part of the leaf spring body is fixed to the axle by U-bolts.
[0014] Regarding the leaf spring body provided in the first aspect, the top plate and / or the bottom plate are used as limiting plates for the side plate to restrict or control the movement of the side plate along the width direction. On the one hand, this avoids damage to the structure of the leaf spring body, thereby ensuring the service life of the leaf spring body; on the other hand, by limiting the side plate in the width direction, the possibility of the side plate falling off is reduced, thereby reducing the maintenance frequency of the leaf spring body and ensuring the safety of using the leaf spring body. Attached Figure Description
[0015] Figure 1 This is a schematic side view of the leaf spring body provided in this application.
[0016] Figure 2 A schematic side view of the leaf spring assembly provided in this application.
[0017] Figure 3 This is an example of a perspective view of the leaf spring body provided in this application.
[0018] Figure 4 This is an example of a perspective view of the embedded assembly leaf spring body provided in this application.
[0019] Figure 5 This is an example of a perspective view showing the connection relationship between the top plate, bottom plate, and side plates provided in this application.
[0020] Figure 6 This is an example of a top view of the leaf spring body of the embedded assembly provided in this application.
[0021] Figure 7 This is an example of a top view of the top plate provided in this application.
[0022] Figure 8 This is another example of a top view of the top plate provided in this application. Detailed Implementation
[0023] It is worth noting that those skilled in the art should understand that the embodiments described below are only for illustrating the solutions provided in this application and should not be considered as limiting the scope of this application. For example, where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product instructions. Furthermore, if the manufacturers of the reagents or instruments used in this application are not specified, they can all be conventional products that can be purchased on the market. In addition, for ease of explanation, the same reference numerals denote the same components in the relevant drawings related to this application, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments.
[0024] To facilitate understanding of the solutions involved in this application, the concepts related to the composite material leaf spring body are explained below.
[0025] Composite materials: refer to materials that can meet people's requirements when one material cannot meet the requirements, and are formed by combining two or more materials.
[0026] As an example, although glass fibers have high strength, they are loosely connected, meaning they can only withstand tensile force but not bending, shear, or compressive stress. They are also difficult to shape into fixed geometries, making them a soft material. If glass fibers are bonded together with synthetic resin, glass fiber reinforced plastic matrix composites can be formed. These can be made into various rigid products with fixed shapes, capable of withstanding tensile, bending, compressive, and shear stresses. Because glass fiber reinforced plastic matrix composites have strength equivalent to steel and contain glass components, they also possess the color, shape, corrosion resistance, electrical insulation, and thermal insulation properties of glass; therefore, they can also be called "fiberglass."
[0027] Composite materials consist of reinforcing materials and matrix materials. For example, in reinforced concrete composites, concrete is the matrix and steel bars are the reinforcing materials.
[0028] The matrix material includes, but is not limited to, epoxy resin, polyester resin, and thermoplastic resin. For example, the matrix material can be a resin matrix, which is the matrix of a resin-based composite material. The resin matrix refers to a liquid system composed of resin and a curing agent. As an example, the resin matrix can include thermosetting resins and thermoplastic resins. Thermosetting resins can only be heated and molded once, curing during processing to form an insoluble, cross-linked polymer network, and therefore cannot be recycled. The resin matrix of the composite material is primarily thermosetting resin. Thermosetting resins include, but are not limited to: phenolic resin, urea-formaldehyde resin, melamine-formaldehyde resin, epoxy resin, unsaturated resin, polyurethane, and polyimide. Reinforcing materials include, but are not limited to, carbon fiber, glass fiber, and aromatic polyamide fiber.
[0029] Reinforcing materials include, but are not limited to, carbon fiber, glass fiber, and aramid fiber. Reinforcing materials can also be reinforcing fibers, i.e., the reinforcing agents in resin-based composite materials. For example, based on geometry, reinforcing materials include: granular, one-dimensional fibrous, two-dimensional sheet-like (e.g., felt-like), and three-dimensional structures. Based on properties, they can be classified as inorganic or organic reinforcing materials, which can be synthetic or natural. Inorganic reinforcing materials can be fibrous, such as inorganic glass fiber, carbon fiber, and a small amount of ceramic fibers such as silicon carbide; organic reinforcing materials include aramid fibers (aramid fiber), etc.
[0030] As an example, the reinforcing material of the composite leaf spring body involved in this application can be glass fiber, carbon fiber, or fiber bundles composed of glass fiber and carbon fiber, and its matrix material can be epoxy resin or other materials, which can also be referred to as fiber-reinforced plastic (FRP) leaf spring body.
[0031] Compared to metal leaf springs, composite leaf springs are characterized by high strength, good temperature resistance, good impact resistance, strong design flexibility, weight reduction of over 70%, and safe fracture resistance. Therefore, using composite materials to make leaf springs can significantly improve the smoothness and comfort of vehicles, while weighing only about 1 / 4 of a steel leaf spring. This not only effectively improves fuel efficiency but also extends the service life of the leaf spring, meaning that the leaf springs do not need to be replaced within the vehicle's lifespan, resulting in relatively low overall vehicle operating and maintenance costs.
[0032] The installation of composite leaf springs is similar to that of steel leaf springs. Like steel leaf springs, the middle part needs to be fixed to the axle, and the two ends need to be connected to the vehicle body.
[0033] Figure 1 This is a schematic structural diagram of the leaf spring body 100 provided in this application.
[0034] like Figure 1 As shown, the leaf spring body 100 has a parabolic structure. The convex surface of the leaf spring body 100 is the upper surface 111, and the concave surface is the lower surface 112. The side surface of the leaf spring body 100 is formed between the upper surface 111 and the lower surface 112. The leaf spring body 100 can be mounted longitudinally or transversely in an automobile. In the latter case, because it needs to transmit longitudinal force, an additional guiding (force transmission) device can be provided.
[0035] Figure 2 A schematic side view of the leaf spring assembly provided in this application.
[0036] like Figure 2 As shown, the leaf spring assembly includes a leaf spring body 100, which can be fixed to the middle of the leaf spring body 100 on the connecting member 260 of the axle 250 by two U-bolts and nuts (U-bolt 230 and the nut of U-bolt 230 shown in the figure). The two ends of the leaf spring body 100 can be nested in leaf spring seats fixed to the frame (leaf spring seats 210 and 220 shown in the figure). Of course, in another implementation, the two ends of the leaf spring body 100 can also be fixedly provided with metal lugs, which are fixedly connected to the frame, and the middle of the leaf spring body is fixed to the axle by U-bolts.
[0037] The molding process of composite leaf springs is generally divided into continuous fiber winding and compression molding.
[0038] Fiber winding involves winding resin-impregnated fibers onto a mold with a fixed shape, followed by curing to obtain the molded product. However, the strength of fiber winding is greatly affected by the adhesion between the fibers, resulting in weak interlayer bonding and easy splitting, leading to lower fatigue resistance and strength in the product, which cannot adequately meet the performance requirements of leaf springs. Therefore, most manufacturers develop composite leaf springs using compression molding, which offers higher precision than fiber winding and produces a smooth surface after molding, eliminating the need for secondary processing. Resin transfer molding (RTM) is a typical compression molding process. Specifically, pre-formed fiber-reinforced material is laid in the mold cavity. The mold must be peripherally sealed and secured to ensure smooth resin flow. After sealing the mold, a measured amount of resin is injected, and after the resin cures, the desired composite leaf spring body can be demolded.
[0039] However, since the reinforcing material of composite leaf springs is usually fiber filaments or fiber bundles, the mechanical properties of the leaf spring body are good in the direction of fiber or fiber bundle extension, but poor in the direction perpendicular to the extension. In particular, since the middle part of the leaf spring body needs to be fixed to the frame with U-bolts, overtightening the U-bolts will damage the integrity of the leaf spring body and reduce its service life.
[0040] To address the aforementioned issues, a top plate and a bottom plate can be installed in the middle of the leaf spring body, and a side plate can be installed between the top plate and the bottom plate to control the distance between them. When the middle of the leaf spring body is fixed to the frame with U-bolts, the distance between the top plate and the bottom plate can be controlled by the side plate, thereby preventing the U-bolts from being installed too tightly, ensuring the integrity of the leaf spring body and improving its service life.
[0041] Normally, the top plate, bottom plate, and side plates are fixed to the leaf spring body using fasteners (such as bolts) or adhesive. However, fixing the top plate, bottom plate, and side plates to the leaf spring body with fasteners can damage the structure of the leaf spring body, thus reducing its service life. When fixing the top plate, bottom plate, and side plates to the leaf spring body with adhesive, during product testing, the adhesive between the side plates and the leaf spring body is prone to tearing. If the side plate detaches from the leaf spring body, it can even lead to loosening of the fixation between the leaf spring body and the frame. This not only increases the frequency of maintenance of the leaf spring body but also increases safety hazards.
[0042] In view of this, this application provides an embedded assembly of a leaf spring body, leaf spring body accessories, and leaf spring assembly, which can reduce the maintenance frequency of the leaf spring body and ensure the safety of using the leaf spring body while ensuring the service life of the leaf spring body.
[0043] The following is a detailed description of the embedded assembly leaf spring body provided in this application.
[0044] In some embodiments, the leaf spring body has a parabolic structure, the convex surface of the parabolic structure being the upper surface of the leaf spring body, and the concave surface of the parabolic structure being the lower surface of the leaf spring body; along the length direction of the leaf spring body, a top plate is provided in the middle region of the upper surface and a bottom plate is provided in the middle region of the lower surface, and a side plate is provided on the side surface of the leaf spring body that is perpendicular to the width direction of the leaf spring body; wherein, the top plate and / or the bottom plate serve as limiting plates for the side plate, used to restrict or control the movement of the side plate along the width direction.
[0045] For example, the side surface is the side surface of the leaf spring body along the length direction of the leaf spring body.
[0046] For example, the top plate may be used as the limiting plate, the bottom plate may be used as the limiting plate, or both the top plate and the bottom plate may be used as the limiting plate. In other words, the limiting plate may include only the top plate, only the bottom plate, or both the top plate and the bottom plate.
[0047] For example, the side plate may be configured to be embedded in the limiting plate to restrict or control the movement of the side plate along the width direction. For instance, the limiting plate may protrude outward relative to the side surface along the width direction and form a first region, and the side plate may be configured to be embedded in the first region.
[0048] For example, the side plate may or may not be fixed relative to the limiting plate.
[0049] Wherein, the side plate is fixed relative to the limiting plate, and the limiting plate can be used to: restrict the movement of the side plate along the width direction; the side plate is not fixed relative to the limiting plate, and the limiting plate can be used to: restrict or control the movement of the side plate along the width direction.
[0050] For example, the side plate can be positioned and fixed to the limiting plate by embedding the limiting plate, so that the limiting plate can restrict the movement of the side plate along the width direction.
[0051] For example, the side plate can be positioned by embedding the limiting plate and fixed to the side surface with adhesive, so that the limiting plate can restrict or control the movement of the side plate along the width direction.
[0052] In this embodiment, the top plate and / or the bottom plate are used as limiting plates for the side plate to restrict or control the movement of the side plate along the width direction. On the one hand, this avoids damage to the structure of the leaf spring body, thereby ensuring the service life of the leaf spring body. On the other hand, by limiting the side plate in the width direction, the possibility of the side plate falling off is reduced, thereby reducing the maintenance frequency of the leaf spring body and ensuring the safety of using the leaf spring body.
[0053] In some embodiments, the leaf spring body has the greatest thickness and the smallest width at the middle position, the leaf spring body has the smallest thickness and the largest width at both ends, there is a transition region between the middle position and either of the two ends, the thickness of the leaf spring body in the transition region gradually decreases along the direction from the middle position to the either end, and the width of the leaf spring body in the transition region gradually increases along the direction from the middle position to the either end.
[0054] Since the leaf spring experiences the greatest pressure in its center during actual use, maximizing its thickness and minimizing its width at the center, and minimizing its thickness and maximizing its width at both ends, increases the maximum pressure the leaf spring (i.e., at its center) can withstand, thereby improving its mechanical properties. Furthermore, introducing this transition region avoids abrupt stress concentrations in the leaf spring structure, minimizing the forces acting on it and further enhancing its mechanical performance.
[0055] It should be understood that this application does not limit the specific values of the width, length, and thickness of the leaf spring body at each position. Specifically, the width of the leaf spring body at each position is the dimension along the width direction of the leaf spring body, the length of the leaf spring body at each position is the dimension along the length direction of the leaf spring body, and the thickness of the leaf spring body at each position is the dimension along the thickness direction of the leaf spring body.
[0056] For example, the top plate, the top plate, and the side plate can be sheet metal made of any material that meets certain strength requirements. For instance, the top plate, the top plate, and the side plate can be steel plates with a strength greater than or equal to a preset strength. The preset strength can be determined based on the dimensions of the leaf spring body or the applicable scenario of the leaf spring body. For example, the preset strength can be positively correlated with the dimensions of the leaf spring body, or it can be positively correlated with the load capacity of the vehicle to which the leaf spring body is applicable.
[0057] For example, the size of the top plate needs to ensure that the side plate can be embedded in the top plate.
[0058] For example, the maximum width of the top plate is greater than or equal to the width of the intermediate region. The maximum width of the top plate is defined as the maximum dimension of the top plate along the width direction of the leaf spring body. For instance, if the width of the top plate is the same at any position, the width at that position is greater than the width of the intermediate region. Note: If both side edge regions of the top plate protrude outwards relative to the leaf spring body along the width direction of the leaf spring body, the side plates can be embedded into the side edge regions. Alternatively, if the width of the top plate is not the same at different positions, the maximum width of the top plate can be equal to the width of the intermediate region. Note: If a portion of the edge region of the top plate protrudes outwards relative to the leaf spring body along the width direction of the leaf spring body, the side plates can be embedded into that portion of the edge region.
[0059] For example, the maximum width of the top plate can range from 40mm to 150mm.
[0060] For example, the length of the top plate can be any value that is less than the length of the leaf spring body.
[0061] For example, the length of the top plate ranges from 40mm to 300mm.
[0062] It should be understood that this application does not limit the specific values of the width, length, and thickness of the top plate. The width of the top plate is the dimension along the width direction of the leaf spring body, the length of the top plate is the dimension along the length direction of the leaf spring body, and the thickness of the top plate is the dimension along the thickness direction of the leaf spring body. Furthermore, the dimensions of the bottom plate and the top plate may be the same or different.
[0063] For example, the size of the side panel needs to ensure that the side panel can be embedded in the top panel.
[0064] For example, the thickness of the side plate is greater than the thickness of the leaf spring body.
[0065] It should be understood that this application does not limit the specific values of the width, length, and thickness of the top plate. The width of the side plate is the dimension along the width direction of the leaf spring body, the length of the side plate is the dimension along the length direction of the leaf spring body, and the thickness of the side plate is the dimension along the thickness direction of the leaf spring body.
[0066] It should be understood that this application does not limit the specific structure of the leaf spring body. For example, a connecting surface may be formed between the upper surface and the side surface of the leaf spring body, and / or between the lower surface and the side surface of the leaf spring body. The connecting surface may be a surface with a stepped structure, an arc surface, or an inclined surface, etc. This application does not specifically limit this.
[0067] It is worth noting that the various value ranges provided in this application are merely examples and should not be construed as limitations on this application. For example, the maximum width of the top plate can also be a value other than 40mm to 150mm, and the length of the top plate can also be a value other than 40mm to 300mm.
[0068] In some embodiments, the limiting plate is formed with at least one first through hole, the at least one first through hole being used to accommodate at least one first protrusion structure formed by the side plate.
[0069] For example, when only the top plate is used as the limiting plate, the at least one first through hole is used to accommodate at least one first protrusion structure formed at the upper end of the side plate. When only the bottom plate is used as the limiting plate, the at least one first through hole is used to accommodate at least one first protrusion structure formed at the lower end of the side plate. When both the top plate and the bottom plate are used as the limiting plate, the at least one first through hole is used to accommodate at least one first protrusion structure formed by the side plate, wherein the at least one first protrusion structure formed by the side plate includes: at least one first protrusion structure formed at the upper end of the side plate and at least one first protrusion structure formed at the lower end of the side plate. The upper end of the side plate is the end of the side plate that contacts the top plate, and the lower end of the side plate is the end of the side plate that contacts the bottom plate.
[0070] For example, the shape of the first through hole on the upper or lower surface of the limiting plate can be a regular or irregular shape such as a circle or rectangle.
[0071] Of course, in other alternative embodiments, the first through hole can be replaced by a groove that does not penetrate the limiting plate, and this application does not specifically limit this. For example, the limiting plate is formed with at least one receiving groove for receiving at least one first protrusion structure formed at the upper end of the side plate. Furthermore, the limiting plate can form a baffle on the outer side of the side plate to restrict or control the movement of the side plate along the width direction.
[0072] For example, the first through hole is used to limit the side plate in the length and / or width direction of the leaf spring body. For instance, the inner surface of the first through hole may include a vertical surface for limiting the side plate in the length and / or width direction of the leaf spring body, the vertical surface being parallel to the side surface of the leaf spring body.
[0073] For example, the first through hole is used to limit the side plate in the thickness direction of the leaf spring body. For instance, the inner surface of the first through hole may include a horizontal plane for limiting the side plate in the thickness direction of the leaf spring body, the horizontal plane being parallel to the upper or lower surface of the leaf spring body.
[0074] For example, the first protrusion structure is a through hole that matches the first through hole structure.
[0075] For example, the first protrusion structure is matched with the structure of the first through hole, and the size of the first protrusion structure is the same as the size of the first through hole, so as to embed and fix the side plate to the limiting plate.
[0076] For example, the first protrusion structure is matched with the structure of the first through hole, and the size of the first protrusion structure is smaller than the size of the first through hole, so that when the side plate is embedded in the limiting plate, the side plate can move relative to the limiting plate. In this case, the side plate can be fixed to the side surface by adhesive.
[0077] In this embodiment, by forming at least one first protrusion structure at the upper end of the at least one first through hole that accommodates the side plate, the side plate is limited, reducing the possibility of the side plate falling off. In turn, the maintenance frequency of the leaf spring body can be reduced and the safety of using the leaf spring body can be guaranteed.
[0078] Of course, in other alternative embodiments, a second through hole for accommodating a fastener of the limiting plate may also be formed on the limiting plate, and this application does not specifically limit this. For example, the fastener may be a bolt or other structural component. Furthermore, the size of the second through hole may be larger than the size of the first through hole.
[0079] In some embodiments, the side plate is fixed to the side surface by adhesive, and a first gap is formed between the first inner surface of the first through hole, which is parallel to the side surface, and the first protrusion structure.
[0080] For example, the first inner surface is the inner surface of the first through hole that is close to the leaf spring body along the width direction.
[0081] In other words, the first inner surface is the inner surface close to the leaf spring body along the width direction, and the first inner surface is parallel to the side surface perpendicular to the width direction of the leaf spring body.
[0082] For example, the first inner surface is the inner surface of the first through hole that is away from the leaf spring body along the width direction.
[0083] In other words, the first inner surface is an inner surface that is away from the leaf spring body along the width direction, and the first inner surface is parallel to the side surface that is perpendicular to the width direction of the leaf spring body.
[0084] For example, the first protrusion structure is structure-matched to the first through hole, and the size of the first protrusion structure is smaller than the size of the first through hole, so as to form the first gap between the first inner surface and the first protrusion structure.
[0085] In this embodiment, a first gap is formed between the first inner surface and the first protruding structure. When the lateral stress on the leaf spring body is large, the leaf spring body can carry the side plate and move within the first gap along the width direction. This can buffer the stress borne by the adhesive and minimize the problem of the adhesive between the side plate and the leaf spring body being torn due to excessive lateral stress on the leaf spring body. In this way, while the side plate is fixed to the side surface by the adhesive, the maintenance frequency of the leaf spring body can be reduced and the safety of using the leaf spring body can be guaranteed.
[0086] In some embodiments, the thickness of the first gap is less than or equal to the thickness of the adhesive.
[0087] In this embodiment, the thickness of the first gap is less than or equal to the thickness of the adhesive, which ensures that the first gap effectively buffers the stress borne by the adhesive. Of course, in other alternative embodiments, the thickness of the first gap may also be greater than or equal to the thickness of the adhesive; this application does not specifically limit this.
[0088] In some embodiments, the value of the first gap ranges from 0.05 mm to 20 mm.
[0089] In this embodiment, the lower limit of the range of the first gap is set to 0.05mm and the upper limit is set to 20mm. This can prevent the thickness of the first gap from being too large or too small, thereby ensuring the buffering effect of the first gap on the stress borne by the adhesive.
[0090] In some embodiments, an elastic pad or filling material is provided in the first gap.
[0091] For example, the elastic pad may be a pad with less strength than the side plate.
[0092] For example, the elastic pad may be a pad with greater elasticity than the side plate.
[0093] For example, the filler material may be adhesive or other elastic material.
[0094] For example, the filling material may be a flexible material.
[0095] In some embodiments, a first side plate is provided on a first side surface of the leaf spring body that is perpendicular to the width direction, and a second side plate is provided on a second side surface of the leaf spring body that is opposite to the first side surface. The at least one first through hole includes a first row of first through holes and a second row of first through holes. The first row of first through holes is used to restrict the movement of the first side plate in a direction close to the second side plate, and the second row of through holes is used to restrict the movement of the second side plate in a direction close to the first side plate. Alternatively, the first row of through holes is used to restrict the movement of the first side plate in a direction away from the second side plate, and the second row of through holes is used to restrict the movement of the second side plate in a direction away from the first side plate.
[0096] In this embodiment, the limiting direction of the first through hole is distinguished by row, so that the limiting plate can control the movement of the first side plate and the second side plate in the direction of approaching (or away from) the leaf spring body while restricting the movement of the first side plate and the second side plate in the direction away from (or close to) the leaf spring body.
[0097] For example, when the first row of first through holes is used to restrict the movement of the first side plate in the direction close to the second side plate, and the second row of through holes is used to restrict the movement of the second side plate in the direction close to the first side plate, the limiting plate can control the movement of the first side plate and the second side plate in the direction away from the leaf spring body, while restricting their movement in the direction close to the leaf spring body. As another example, when the first row of through holes is used to restrict the movement of the first side plate in the direction away from the second side plate, and the second row of through holes is used to restrict the movement of the second side plate in the direction away from the first side plate, the limiting plate can control the movement of the first side plate and the second side plate in the direction close to the leaf spring body, while restricting their movement in the direction away from the leaf spring body.
[0098] For example, the first row of first through holes is used to accommodate a first protrusion structure formed on the first side plate, and the first row of first through holes is used to accommodate a first protrusion structure formed on the second side plate.
[0099] For example, the first side plate and the second side plate are arranged in parallel.
[0100] For example, the first through holes in the first row and the first through holes in the second row are disposed on the two side edge regions of the limiting plate that protrude outward relative to the leaf spring body.
[0101] For example, the first through holes in the first row and the first through holes in the second row are symmetrically arranged.
[0102] For example, the first through holes in the first row and the first through holes in the second row are staggered to improve the spatial uniformity of the first through holes, thereby improving the limiting effect of the first through holes. For instance, the first through holes in the first row and the first through holes in the second row are located on the two side edge regions of the limiting plate that protrude outward in the width direction relative to the leaf spring body. When two adjacent first through holes from the first row are located on one side edge region of the two side edge regions, one of the first through holes from the second row is located at the position corresponding to the middle position of the two adjacent first through holes on the other side edge region of the two side edge regions.
[0103] For example, both the first side plate and the second side plate are fixed to the side surface of the leaf spring body, which is perpendicular to the width direction of the leaf spring body, by adhesive. For any one of the first through holes in the first row and the second row, a first gap is formed between the first inner surface of the first through hole, which is parallel to the side surface, and the first protrusion structure accommodated by the first through hole.
[0104] It should be understood that the relevant solutions for the first gap can refer to the solutions described above, and will not be repeated here to avoid repetition.
[0105] For example, the first inner surface of any one of the first through holes can be the inner surface of any one of the first through holes that is close to the leaf spring body along the width direction. Thus, the limiting plate can control the movement of the first side plate and the second side plate in the direction close to the leaf spring body, while restricting the movement of the first side plate and the second side plate in the direction away from the leaf spring body.
[0106] Specifically, the first inner surface of any one of the first through holes is the inner surface of any one of the first through holes that is close to the leaf spring body along the width direction, which can restrict the movement of the first side plate and the second side plate in the direction away from the leaf spring body, and the width of the first gap can control the movement of the first side plate and the second side plate in the direction close to the leaf spring body.
[0107] For example, the first inner surface of any one of the first through holes can be the inner surface of any one of the first through holes that is close to the leaf spring body along the width direction. Thus, the limiting plate can control the movement of the first side plate and the second side plate in the direction close to the leaf spring body, while restricting their movement.
[0108] Specifically, the first inner surface of any one of the first through holes is the inner surface of any one of the first through holes that is close to the leaf spring body along the width direction, which can restrict the movement of the first side plate and the second side plate in the direction close to the leaf spring body, and the width of the first gap can control the movement of the first side plate and the second side plate in the direction away from the leaf spring body.
[0109] In some embodiments, the width of the first through hole located near the middle position of the limiting plate along the length direction is greater than the width of the first through hole located near the edge position of the limiting plate along the length direction; and / or, the length of the first through hole located near the middle position of the limiting plate along the length direction is greater than the length of the first through hole located near the edge position of the limiting plate along the length direction.
[0110] For example, the at least one first through hole is disposed on the two side edge regions of the limiting plate that protrude outward in the width direction relative to the leaf spring body. For either side edge region, the width of the first through hole at the middle position of the at least one first through hole along the length direction near the edge position of the at least one first through hole is greater than the width of the first through hole at the edge position of the at least one first through hole along the length direction near the edge position of the at least one first through hole; or, the length of the first through hole at the middle position of the at least one first through hole along the length direction near the edge position of the at least one first through hole is greater than the length of the first through hole at the edge position of the at least one first through hole along the length direction near the edge position of the at least one first through hole.
[0111] Since the area near the middle of the leaf spring body is a region where stress is concentrated, in this embodiment, the width of the first through hole near the middle position of the limiting plate along the length direction is greater than the width of the first through hole near the edge position of the limiting plate along the length direction; or, the length of the first through hole near the middle position of the limiting plate along the length direction is greater than the length of the first through hole near the edge position of the limiting plate along the length direction. Compared with the first through hole near the edge position of the limiting plate along the length direction, the buffering effect of the first through hole near the middle position of the limiting plate along the length direction can be increased, thereby balancing the lateral stress borne by various parts of the side plate. This improves the service life of the first protrusion structure accommodated in the first through hole near the middle position of the limiting plate along the length direction, which is equivalent to reducing the maintenance frequency of the leaf spring body and ensuring the safety of using the leaf spring body.
[0112] In some embodiments, along the width direction, the limiting plate extends outward in the edge region of the at least one first through hole to form at least one second protrusion structure, the length of the second protrusion structure being greater than the length of the first through hole.
[0113] For example, the width of the second protrusion structure is equal at any position.
[0114] For example, the second protrusion structure can be a structure that matches a portion of the inner surface of the first through hole, in which case the width of the second protrusion structure is equal at any position.
[0115] For example, when the first through hole is circular (or rectangular) on the upper or lower surface of the limiting plate, the second protrusion structure is also semi-circular (or rectangular) on the upper or lower surface of the limiting plate.
[0116] For example, the width of the second protrusion structure may be unequal at different locations.
[0117] For example, the second protrusion may be a structure that does not match the inner surface of the first through hole. In this case, the width of the second protrusion may not be equal at different locations.
[0118] For example, when the first through hole is circular on the upper or lower surface of the limiting plate, the second protrusion structure can be rectangular or other shapes different from circular on the upper or lower surface of the limiting plate.
[0119] In this embodiment, along the width direction, the limiting plate extends outward to form at least one second protrusion structure in the edge region of at least one first through hole. This can reduce the possibility of the edge region of the first through hole breaking when the limiting plate buffers the lateral stress borne by the side plate, thereby protecting the first through hole and increasing its service life. In other words, it can reduce the maintenance frequency of the leaf spring body and ensure the safety of using the leaf spring body.
[0120] In some embodiments, the aspect ratio of the second protrusion structure is greater than the aspect ratio of the first through hole.
[0121] For example, the aspect ratio of the second protrusion structure can be the ratio of the length of the second protrusion structure to the width of the second protrusion structure. For instance, when the second protrusion structure is an irregular structure, the aspect ratio of the second protrusion structure can be the ratio of the maximum length of the second protrusion structure to the maximum width of the second protrusion structure.
[0122] For example, the aspect ratio of the first through hole can be the ratio of the length of the first through hole to the width of the first through hole. For instance, when the first through hole is an irregular through hole, the aspect ratio of the first through hole can be the ratio of the maximum length of the first through hole to the maximum width of the first through hole.
[0123] In this embodiment, the aspect ratio of the second protrusion is greater than that of the first through hole. This allows the second protrusion to protect the first through hole while minimizing the impact on the installation of the leaf spring body due to its excessive size.
[0124] For example, the length of the second protrusion is greater than the length of the first through hole, and the width of the second protrusion is less than the width of the first through hole. For instance, the maximum length of the second protrusion is greater than the maximum length of the first through hole, and the maximum width of the second protrusion is less than the maximum width of the first through hole. Therefore, the aspect ratio of the second protrusion is greater than that of the first through hole, thereby enabling the second protrusion to protect the first through hole.
[0125] For example, the size of the second protrusion structure is positively correlated with the size of the first through hole.
[0126] For example, the width of the second protrusion structure ranges from 0.1 mm to 30 mm.
[0127] For example, the length of the second protrusion structure ranges from 1 mm to 150 mm.
[0128] In this embodiment, setting the lower limit of the width range of the second protrusion structure to 0.1 mm or the lower limit of its length range to 1 mm ensures that the second protrusion structure can protect the first through hole. In addition, setting the upper limit of the width range of the second protrusion structure to 30 mm or the upper limit of its length range to 150 mm avoids affecting the installation of the leaf spring body due to the excessive size of the second protrusion structure, thus ensuring the practicality of the leaf spring body.
[0129] It should be understood that this application does not limit the specific values of the width and length of the second protrusion structure. For example, the width or length of the second protrusion structure can be values outside the aforementioned range. The width of the second protrusion structure is the dimension along the width direction of the leaf spring body. The length of the second protrusion structure is the dimension along the length direction of the leaf spring body.
[0130] For example, the size of the first through hole is positively correlated with the size of the side plate. For instance, the length of the first through hole is positively correlated with the length of the side plate. Similarly, the width of the first through hole is positively correlated with the width of the side plate.
[0131] For example, the width of the first through hole ranges from 0.5 mm to 30 mm.
[0132] For example, the length of the first through hole ranges from 0.2 mm to 150 mm.
[0133] In this embodiment, setting the lower limit of the width range of the first through hole to 0.5mm or the lower limit of the length range to 0.2mm ensures that the first through hole can effectively limit the side plate. Furthermore, setting the upper limit of the width range of the first through hole to 30mm or the upper limit of the length range to 150mm avoids affecting the installation of the leaf spring body due to the excessive size of the first through hole, thus ensuring the practicality of the leaf spring body.
[0134] It should be understood that this application does not limit the specific values of the width and length of the first through hole. For example, the width or length of the first through hole can be other values outside the above-mentioned range. The width of the first through hole is the dimension along the width direction of the leaf spring body. The length of the first through hole is the dimension along the length direction of the leaf spring body.
[0135] In some embodiments, the side surface of the limiting plate perpendicular to the width direction is formed with at least one first groove, the first groove being used to accommodate a U-bolt for fixing the leaf spring body to the axle.
[0136] For example, the U-bolt may also be called a saddle bolt.
[0137] For example, the number of the at least one first groove is equal to the number of the U-bolts.
[0138] In this embodiment, the side surface of the limiting plate is formed with at least one first groove for accommodating the U-shaped bolt that fixes the leaf spring body to the axle. This not only saves the space occupied by the U-shaped bolt, but also limits the position of the U-shaped bolt, thereby reducing the installation complexity of the U-shaped bolt and improving the installation efficiency.
[0139] In some embodiments, the depth of the first groove ranges from 0.1 mm to 60 mm, and the width of the first groove ranges from 2 mm to 150 mm.
[0140] In this embodiment, setting the lower limit of the depth range of the first groove to 0.1 mm and the lower limit of its width range to 2 mm ensures that the first groove can accommodate the U-bolt. Furthermore, setting the upper limit of the depth range of the first groove to 60 mm and the upper limit of its width range to 150 mm not only ensures that the first groove can accommodate U-bolts of any size, but also avoids affecting the installation of the leaf spring body due to the excessive size of the first groove, thus ensuring the practicality of the leaf spring body.
[0141] It should be understood that this application does not limit the specific values of the depth and width of the first groove. The depth or width of the first groove can be other values outside the above-mentioned range. Specifically, the depth of the first groove is the dimension along the width direction of the leaf spring body, and the width of the first groove is the dimension along the length direction of the leaf spring body.
[0142] In some embodiments, the side plate is formed with at least one second groove communicating with the at least one first groove, the first groove being used to receive the U-bolt.
[0143] In this embodiment, the side plate is formed with at least one second groove that communicates with the at least one first groove and is used to accommodate the U-bolt. This not only saves the space occupied by the U-bolt, but also limits the position of the U-bolt, thereby reducing the installation complexity of the U-bolt and improving the installation efficiency.
[0144] In some embodiments, both the top plate and the bottom plate serve as the limiting plate; or, the top plate serves as the limiting plate, and the side plate and the bottom plate form a non-removable U-shaped structure; or, the bottom plate serves as the limiting plate, and the side plate and the top plate form a non-removable U-shaped structure.
[0145] For example, the side plate and the bottom plate form a non-removable U-shaped structure, which can be formed by extending the edge of the bottom plate upward to form a side plate, thereby the side plate and the bottom plate can form a non-removable U-shaped structure.
[0146] For example, the side plate and the top plate form a non-removable U-shaped structure, which can be formed by extending downward from the edge of the top plate to form a side plate, thereby the side plate and the bottom plate can form a non-removable U-shaped structure.
[0147] For example, when both the top plate and the bottom plate serve as the limiting plate, the top plate and the bottom plate are used to restrict or control the movement of the side plate along the width direction; when the top plate serves as the limiting plate, the top plate is used to restrict or control the movement of the non-removable U-shaped structure formed by the side plate and the bottom plate along the width direction; when the bottom plate serves as the limiting plate, the bottom plate is used to restrict or control the movement of the non-removable U-shaped structure formed by the side plate and the top plate along the width direction.
[0148] In this embodiment, both the top plate and the bottom plate serve as limiting plates, which improves the limiting effect of the limiting plates. Designing the side plates and the bottom plate as non-removable U-shaped structures, or designing the side plates and the top plate as non-removable U-shaped structures, can reduce the installation complexity of the leaf spring body.
[0149] It should be understood that in this application, when both the top plate and the bottom plate serve as the limiting plate, the way in which the lower end of the side plate is embedded into the bottom plate can be the same as or different from the way in which the upper end of the side plate is embedded into the top plate. This application does not make any specific limitation in this regard.
[0150] The structure of the leaf spring body provided in this application will be described below with reference to the accompanying drawings.
[0151] Figure 3 This is an example of a perspective view of the leaf spring body provided in this application.
[0152] like Figure 3 As shown, the leaf spring body 100 has a parabolic structure. The convex surface of the leaf spring body 100 is the upper surface 111, and the concave surface is the lower surface 112. A side surface of the leaf spring body 100 is formed between the upper surface 111 and the lower surface 112. Furthermore, the leaf spring body 100 has the greatest thickness and the smallest width at the middle position, and the smallest thickness and the greatest width at both ends. There is a transition region between the middle position and either end. The thickness of the leaf spring body 100 in the transition region gradually decreases from the middle position to the end, and the width of the leaf spring body 100 in the transition region gradually increases from the middle position to the end, thereby improving the mechanical properties of the leaf spring body 100.
[0153] Figure 4 This is an example of a perspective view of the embedded assembly leaf spring body provided in this application.
[0154] like Figure 4 As shown, along the length direction of the leaf spring body 100, a top plate 310 is provided in the middle region of the upper surface and a bottom plate 320 is provided in the middle region of the lower surface; wherein, a side plate 330 is provided on the side surface of the leaf spring body that is perpendicular to the width direction of the leaf spring body, and is embedded in the top plate 310 and the bottom plate 320, that is, the top plate 310 and the bottom plate 320 serve as limiting plates for the side plate 330, and are used to restrict or control the movement of the side plate 330 along the width direction.
[0155] In this embodiment, by providing a side plate 330 embedded in the top plate 310 on the side surface of the leaf spring body 100 that is perpendicular to the width direction of the leaf spring body, on the one hand, damage to the structure of the leaf spring body 100 is avoided, thereby ensuring the service life of the leaf spring body 100; on the other hand, the design of the side plate 330 being embedded in the top plate 310 limits the side plate 330, reducing the possibility of the side plate 330 falling off, thereby reducing the maintenance frequency of the leaf spring body 100 and ensuring the safety of using the leaf spring body 100.
[0156] Figure 5 This is an example of a perspective view showing the connection relationship between the top plate, bottom plate, and side plates provided in this application.
[0157] like Figure 5 As shown, the lower end of the side plate 330 can also be embedded in the bottom plate 320. The structure of the bottom plate 330 is the same as that of the top plate 310, and the way in which the lower end of the side plate 330 is embedded in the bottom plate 320 can be the same as the way in which the upper end of the side plate 330 is embedded in the top plate 310.
[0158] Figure 6 This is an example of a top view of the leaf spring body of the embedded assembly provided in this application.
[0159] like Figure 6 As shown, the leaf spring body 100 has the smallest width at its middle position and the largest width at both ends. A transition region exists between the middle position and either end, and the width of the leaf spring body 100 in this transition region gradually increases from the middle position to either end, thereby improving the mechanical properties of the leaf spring body 100. Furthermore, a connecting surface is formed between the upper surface and the side surface of the leaf spring body 100. This connecting surface is curved.
[0160] Figure 7 This is an example of a top view of the top plate provided in this application.
[0161] like Figure 7 As shown, the maximum width d0 of the top plate 310 ranges from 40mm to 150mm. The length d1 of the top plate 310 ranges from 40mm to 300mm.
[0162] Furthermore, the top plate 310 may include a first through hole 311 or a first through hole 314 for accommodating a first protrusion structure formed at the upper end of the side plate 330. The inner side of the first through hole 311 includes a first gap 312, and the inner side of the first through hole 314 includes a first gap 315. The width d2 of the first through hole 311 is the same as the width of the first through hole 314. The length d3 of the first through hole 311 is less than the length of the first through hole 314. The width d4 of the first gap 312 is the same as the width of the first gap 315.
[0163] For example, the value of d2 ranges from 0.5mm to 30mm.
[0164] The value of d3 ranges from 0.2mm to 150mm.
[0165] The value of d4 ranges from 0.05mm to 20mm.
[0166] The length of the first through hole 314 ranges from 2mm to 150mm.
[0167] In this embodiment, since the first through hole 314 is a region where the stress is concentrated, the length d3 of the first through hole 311 is less than the length of the first through hole 314. This can increase the buffering effect of the first through hole 314 on lateral stress relative to the first through hole 311, thereby improving the service life of the first through hole 314. This is equivalent to reducing the maintenance frequency of the leaf spring body 100 and ensuring the safety of using the leaf spring body 100.
[0168] like Figure 7 As shown, along the width direction of the leaf spring body 100, the top plate 310 extends outward from the edge region of the first through hole 311 to form a second protrusion structure 313, and the top plate 310 extends outward from the edge region of the first through hole 314 to form a second protrusion structure 316. The width d5 of the second protrusion structure 313 and the width of the second protrusion structure 316 are the same, and the length d6 of the second protrusion structure 313 is less than the length d9 of the second protrusion structure 316.
[0169] For example, the value of d5 ranges from 0.1 mm to 30 mm.
[0170] The value of d6 ranges from 1mm to 150mm.
[0171] The value of d9 ranges from 2mm to 150mm.
[0172] In this embodiment, along the width direction, the second protrusion structure 313 can reduce the possibility of edge region fracture 311 when the top plate 310 buffers the lateral stress borne by the side plate 330, and the second protrusion structure 316 can reduce the possibility of edge region fracture 314 when the top plate 310 buffers the lateral stress borne by the side plate 330, thereby improving the service life of the first through hole 311 and the first through hole 314. This is equivalent to reducing the maintenance frequency of the leaf spring body 100 and ensuring the safety of using the leaf spring body 100.
[0173] like Figure 7 As shown, the side surface of the top plate 310 is formed with a first groove 317 for receiving a U-bolt that fixes the leaf spring body 100 to the axle.
[0174] The width d7 of the first groove ranges from 2mm to 150mm.
[0175] The depth d8 of the first groove 317 ranges from 0.1mm to 60mm.
[0176] like Figure 7 As shown, the top plate 310 may also have a second through hole 318 extending through the top plate 310. The second through hole 318 can be used to accommodate fasteners that fix the top plate 310 to the leaf spring body 100. The fasteners may be bolts.
[0177] It should be understood that Figure 7These are merely examples and should not be construed as limiting the scope of this application. For instance, in other alternative embodiments, the top plate 310 or the bottom plate 320 may serve solely as a limiting plate for the side plate 330, used to restrict or control the movement of the side plate 330 along the width direction. Furthermore, the side plate of the leaf spring body opposite to the side plate 330 may not be embedded in the top plate 310 and / or the bottom plate 320. d0 to d9 may also be values outside the range described above, or the top plate 310 may only include a row of first through holes, or the first gap 312 may be located outside the first through hole 311, or the first gap 315 may be located outside the first through hole 314; this application does not specifically limit these possibilities.
[0178] Figure 8 This is another example of a top view of the top plate provided in this application.
[0179] like Figure 8 As shown, with Figure 7 Compared to the top plate 310 shown in Figure 8, the side surface of the top plate 310 may not have the first groove 317 for receiving the U-bolt used to fix the leaf spring body 100 to the axle. Other structural and reference numerals can be found in the figures. Figure 7 To avoid repetition, the explanation will not be repeated here.
[0180] This application also provides a leaf spring body assembly, which includes the top plate, bottom plate, and side plates assembled on the leaf spring body mentioned above.
[0181] For example, the leaf spring body component may include, Figure 5 The top plate, bottom plate, and side plates are shown.
[0182] This application also provides a leaf spring assembly, including the leaf spring body described above, with both ends of the leaf spring body nested in leaf spring seats, the leaf spring seats being fixedly connected to the vehicle frame, and the middle part of the leaf spring body being fixed to the axle by U-bolts.
[0183] This application also provides a leaf spring assembly, including the leaf spring body described above, with metal lugs fixedly provided at both ends of the leaf spring body, the metal lugs being fixedly connected to the vehicle frame, and the middle part of the composite material leaf spring body being fixed to the axle by a U-bolt.
[0184] It should be understood that the relevant solutions for the leaf spring body components and leaf spring assemblies involved in this application can be referred to the above description of the embedded assembly leaf spring body, and will not be repeated here to avoid repetition. It should also be understood that the leaf spring body, composite material leaf spring, and composite material leaf spring body described in this application specification can all refer to the resin-based fiber composite material leaf spring body, which can also be simply referred to as a leaf spring, and this application does not limit this.
[0185] It should be noted that, without conflict, the various embodiments and / or technical features described in this application can be arbitrarily combined with each other, and the resulting technical solutions should also fall within the protection scope of this application.
[0186] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. An embedded assembly leaf spring body, the leaf spring body having a parabolic structure, the convex surface of the parabolic structure being the upper surface of the leaf spring body, and the concave surface of the parabolic structure being the lower surface of the leaf spring body; Its features are, Along the length direction of the leaf spring body, a top plate is provided in the middle area of the upper surface and a bottom plate is provided in the middle area of the lower surface, and a side plate is provided on the side surface of the leaf spring body that is perpendicular to the width direction of the leaf spring body; wherein, the top plate and / or the bottom plate serve as limiting plates for the side plate, used to restrict or control the movement of the side plate along the width direction; The limiting plate has at least one first through hole, which is used to accommodate at least one first protrusion structure on the side plate; The side plate is fixed to the side surface by adhesive, and a first gap is formed between the first inner surface parallel to the side surface of the leaf spring body and the first protruding structure in the first through hole; Along the width direction, the limiting plate extends outward in the edge region of the at least one first through hole to form at least one second protrusion structure; The length of the second protrusion is greater than the length of the first through hole, and the aspect ratio of the second protrusion is greater than the aspect ratio of the first through hole.
2. The leaf spring body according to claim 1, characterized in that, The thickness of the first gap is less than or equal to the thickness of the adhesive.
3. The leaf spring body according to claim 1, characterized in that, The value of the first gap ranges from 0.05mm to 20mm.
4. The leaf spring body according to claim 1, characterized in that, An elastic gasket or filling material is provided in the first gap.
5. The leaf spring body according to claim 1, characterized in that, A first side plate is provided on the first side surface of the leaf spring body that is perpendicular to the width direction, and a second side plate is provided on the second side surface of the leaf spring body that is opposite to the first side surface. The at least one first through hole includes a first row of first through holes and a second row of first through holes. Wherein, the first row of first through holes is used to restrict the movement of the first side plate in the direction close to the second side plate, and the second row of first through holes is used to restrict the movement of the second side plate in the direction close to the first side plate; or, the first row of first through holes is used to restrict the movement of the first side plate in the direction away from the second side plate, and the second row of first through holes is used to restrict the movement of the second side plate in the direction away from the first side plate.
6. The leaf spring body according to claim 1, characterized in that, The width of the first through hole located near the center of the limiting plate along the length direction of the at least one first through hole is greater than the width of the first through hole located near the edge of the limiting plate along the length direction of the at least one first through hole; and / or The length of the first through hole located near the middle of the limiting plate along the length direction is greater than the length of the first through hole located near the edge of the limiting plate along the length direction.
7. The leaf spring body according to any one of claims 1 to 6, characterized in that, The limiting plate has at least one first groove on its side surface perpendicular to the width direction. The first groove is used to accommodate a U-bolt for fixing the leaf spring body to the axle.
8. The leaf spring body according to claim 7, characterized in that, The depth of the first groove ranges from 0.1mm to 60mm, and the width of the first groove ranges from 2mm to 150mm.
9. The leaf spring body according to claim 7, characterized in that, The side plate is formed with at least one second groove communicating with the at least one first groove, the first groove being used to accommodate the U-bolt.
10. The leaf spring body according to any one of claims 1 to 6, characterized in that, Both the top plate and the bottom plate serve as the limiting plate; or, the top plate serves as the limiting plate, and the side plate and the bottom plate form a non-removable U-shaped structure; or, the bottom plate serves as the limiting plate, and the side plate and the top plate form a non-removable U-shaped structure.
11. An embedded assembly leaf spring body accessory, characterized in that, include: The top plate, bottom plate, and side plate assembled on the leaf spring body according to any one of claims 1 to 10.
12. A leaf spring assembly, characterized in that, include: According to any one of claims 1 to 10, the leaf spring body has its two ends nested in leaf spring seats, the leaf spring seats being fixedly connected to the vehicle frame, and the middle part of the leaf spring body being fixed to the axle by U-bolts; or According to any one of claims 1 to 10, the leaf spring body is provided with metal lugs at both ends, the metal lugs are fixedly connected to the vehicle frame, and the middle part of the leaf spring body is fixed to the axle by a U-bolt.