CN221233403U

CN221233403U - Plate spring body, plate spring body fitting and plate spring assembly of embedded assembly

Info

Publication number: CN221233403U
Application number: CN202321856888.XU
Authority: CN
Inventors: 董轩诚
Original assignee: Xi'an Lianrui Technology Industry Co ltd
Current assignee: Xi'an Lianrui Technology Industry Co ltd
Filing date: 2023-07-14
Publication date: 2024-06-28
Anticipated expiration: 2033-07-14

Abstract

The application provides an embedded plate spring body, a plate spring body fitting and a plate spring assembly, wherein the plate spring body is provided with a parabolic structure, the convex surface of the parabolic structure is the upper surface of the plate spring body, and the concave surface of the parabolic structure is the lower surface of the plate spring body; along the length direction of the plate spring body, a top plate is arranged in the middle area of the upper surface, a bottom plate is arranged in the middle area of the lower surface, and side plates are arranged on the side surfaces of the plate spring body, which are perpendicular to the width direction of the plate spring body; wherein, roof and/or bottom plate are used as the limiting plate of curb plate for restrict or control curb plate along the motion of width direction. In the embodiment of the application, the top plate and/or the bottom plate are used as the limiting plates of the side plates and used for limiting or controlling the movement of the side plates along the width direction, so that the maintenance frequency of the plate spring body can be reduced and the safety of using the plate spring body can be ensured on the basis of ensuring the service life of the plate spring body.

Description

Plate spring body, plate spring body fitting and plate spring assembly of embedded assembly

Technical Field

The present application relates to suspensions for automobiles, and more particularly, to a snap-fit leaf spring body, leaf spring body fitting and leaf spring assembly.

Background

The composite material is widely studied by a plurality of automobile manufacturers in recent years as a plate spring material for automobiles, and is commercially applied to part of automobile types.

However, since the reinforcing material of the composite plate spring body is usually fiber filaments or fiber bundles, the plate spring body has good mechanical properties in the extending direction of the fibers or fiber bundles, but has poor mechanical properties in the vertical extending direction. In particular, because the middle part of the plate spring body needs to be fixed to the frame through the U-shaped bolt, the integrity of the plate spring body can be damaged when the U-shaped bolt is installed too tightly, and the service life of the plate spring body is reduced.

To above-mentioned problem, can set up roof and bottom plate at the middle part of leaf spring body to be provided with the curb plate that is used for controlling the distance between this roof and this bottom plate, when the middle part of leaf spring body passes through U type bolt fastening to the frame, through the distance between this roof of curb plate control and the bottom plate, and then can avoid the too tight of U type bolt installation, in order to guarantee the wholeness of leaf spring body and promote the life of leaf spring body.

Typically, the top plate, bottom plate, and side plates are fixed to the leaf spring body by means of fasteners (e.g., bolts) or by means of adhesive fixation. However, when the top plate, the bottom plate and the side plates are fixed to the plate spring body by means of fasteners, the structure in the plate spring body can be damaged, and the service life of the plate spring body is further reduced; and when fixed to the leaf spring body through pasting fixed mode with roof, bottom plate and curb plate, in the test stage of product, the problem that the viscose between curb plate and the leaf spring body was torn appears easily, if this curb plate drops from this leaf spring body the condition, can lead to even fixing between leaf spring body and the frame to loosen, this maintenance frequency that can not only promote the leaf spring body has still increased the potential safety hazard.

Disclosure of utility model

The application provides an embedded type assembled plate spring body, a plate spring body fitting and a plate spring assembly, which can reduce the maintenance frequency of the plate spring body and ensure the safety of using the plate spring body on the basis of ensuring the service life of the plate spring body.

In a first aspect, the present application provides an embedded assembled leaf spring body having a parabolic structure with a convex surface being an upper surface of the leaf spring body and a concave surface being a lower surface of the leaf spring body; a top plate is arranged in the middle area of the upper surface and a bottom plate is arranged in the middle area of the lower surface along the length direction of the plate spring body, and side plates are arranged on the side surfaces of the plate spring body, which are perpendicular to the width direction of the plate spring body; the top plate and/or the bottom plate are/is used as limiting plates of the side plates and used for limiting or controlling the movement of the side plates along the width direction.

In a second aspect, the present application provides an insert-fitted leaf spring body fitting comprising:

a top plate, a bottom plate, and side plates to which the leaf spring body is assembled are provided according to the first aspect.

In a third aspect, there is provided a leaf spring assembly comprising:

According to the plate spring body provided by the first aspect, two ends of the plate spring body are nested on the plate spring seat, the plate spring seat is fixedly connected with the vehicle frame, and the middle part of the plate spring body is fixed on the vehicle axle through the U-shaped bolt;

in a fourth aspect, there is provided a leaf spring assembly comprising:

According to the plate spring body provided by the first aspect, the metal rolling lugs are fixedly arranged at the two ends of the plate spring body and fixedly connected with the vehicle frame, and the middle part of the plate spring body is fixed on the vehicle axle through the U-shaped bolts.

Aiming at the plate spring body provided in the first aspect, the top plate and/or the bottom plate are used as limiting plates of the side plates and used for limiting or controlling the movement of the side plates along the width direction, on one hand, the damage to the structure of the plate spring body is avoided, and the service life of the plate spring body can be further ensured; on the other hand, through spacing the curb plate in width direction, reduced the possibility that the curb plate drops, and then can reduce the maintenance frequency of leaf spring body and guarantee the security of using the leaf spring body.

Drawings

Fig. 1 is a schematic side view of a leaf spring body provided by the present application.

Fig. 2 is a schematic side view of a leaf spring assembly provided by the present application.

Fig. 3 is an example of a perspective view of a leaf spring body provided by the present application.

Fig. 4 is an example of a perspective view of an insert-assembled leaf spring body provided by the present application.

Fig. 5 is an example of a perspective view of the connection relationship of the top plate, the bottom plate, and the side plates provided by the present application.

Fig. 6 is an example of a top view of an insert-assembled leaf spring body provided by the present application.

Fig. 7 is an example of a top view of a top plate provided by the present application.

Fig. 8 is an example of another top view of a top plate provided by the present application.

Detailed Description

It should be noted that the following examples are only illustrative of the solution provided by the present application and should not be construed as limiting the scope of the present application. For example, the examples are not to be construed as specifying a particular technique or condition, as described in the literature in the field, or as per the product specifications. As another example, the reagents or apparatus used in connection with the present application may be conventional products available commercially without the manufacturer's attention. In addition, for convenience of explanation, the same reference numerals denote the same components with respect to the related drawings to which the present application relates, and detailed explanation of the same components is omitted in different embodiments for brevity.

In order to facilitate the understanding of the solution according to the application, the concept of the composite leaf spring body will be described.

Composite material: refers to a material which is formed by compounding two or more materials when the material can not meet the use requirement and can meet the requirement of people.

By way of example, glass fibers, while strong, are loose between fibers, can only withstand tensile forces, cannot withstand bending, shearing and compressive stresses, and are not easily formed into a fixed geometry, and are loose. If glass fibers are bonded together with synthetic resin, a glass fiber reinforced plastic matrix composite can be formed that can be formed into a variety of rigid articles having a fixed shape that can withstand both tensile and bending, compressive and shear stresses. Since the glass fiber reinforced plastic-based composite material has strength equivalent to steel, contains glass components, and also has properties such as color, shape, corrosion resistance, electrical insulation, heat insulation, and the like, which may also be referred to as "glass fiber reinforced plastic".

The composite material consists of a reinforcing material and a matrix material. For example, for reinforced concrete composites, the concrete is the matrix and the reinforcement is the reinforcing material.

Wherein the matrix material includes, but is not limited to, epoxy resin, polyester resin, thermoplastic resin, etc. For example, the matrix material may be a resin matrix, i.e. a matrix of a resin-based composite material. The resin matrix refers to a glue solution system composed of resin and a curing agent. As an example, the resin matrix may include a thermosetting resin and a thermoplastic resin. Thermosetting resins can only be heated and molded once, and cure during processing to form insoluble network crosslinked polymer compounds, and therefore cannot be regenerated. The resin matrix of the composite material is mainly thermosetting resin. Thermoset resins include, but are not limited to: phenolic resins, urea-formaldehyde resins, melamine-formaldehyde resins, epoxy resins, unsaturated resins, polyurethanes, polyimides, and the like. Reinforcing materials include, but are not limited to, carbon fibers, glass fibers, aramid fibers, and the like.

Reinforcing materials include, but are not limited to, carbon fibers, glass fibers, aramid fibers, and the like. The reinforcing material may be reinforcing fibers (reinforcing fibers), i.e., a reinforcement of a resin-based composite material. By way of example, the reinforcing material comprises, geometrically: particulate, one-dimensional fibrous, two-dimensional lamellar (e.g., felt), and three-dimensional steric structures. Inorganic reinforcing materials and organic reinforcing materials are classified by properties, and may be synthetic or natural. The inorganic reinforcing material may be fibrous, such as inorganic glass fibers, carbon fibers, and ceramic fibers such as a small amount of silicon carbide, and the organic reinforcing material includes aramid fibers (aramid fibers) and the like.

As an example, the reinforcing material of the composite plate spring body according to the present application may be glass fiber, carbon fiber, or a fiber bundle composed of glass fiber and carbon fiber, and the matrix material may be a material such as epoxy resin, or may be referred to as a fiber reinforced plastic (Fibred-Reinforced Plastic, FRP) plate spring body.

Compared with the metal plate spring body, the composite plate spring body has the advantages of high strength, good temperature resistance, good impact resistance, strong designability, weight reduction of more than 70%, safe fracture and the like, so that the smoothness and the comfort of a vehicle can be greatly improved by using the composite plate spring body, the quality is only about 1/4 of that of the plate spring body, the fuel efficiency is effectively improved, the service life of the plate spring body is prolonged, namely, the plate spring body does not need to be replaced in the service life of the whole vehicle, and the use cost and the maintenance cost of the whole vehicle are relatively low.

The installation of the composite plate spring body is similar to the installation of the plate spring, and the middle part needs to be fixed on the axle like the plate spring, and the two ends are connected on the vehicle body.

Fig. 1 is a schematic structural view of a leaf spring body 100 provided by the present application.

As shown in fig. 1, the plate spring body 100 has a parabolic structure, the convex surface of the plate spring body 100 is an upper surface 111 of the plate spring body 100, the concave surface of the plate spring body 100 is a lower surface 112 of the plate spring body 100, and a side surface of the plate spring body 100 is formed between the upper surface 111 and the lower surface 112. The leaf spring body 100 can be arranged longitudinally or transversely on the vehicle, which can be provided with additional guiding (force transmission) means, because of the longitudinal force to be transmitted.

As shown in fig. 2, the leaf spring assembly includes a leaf spring body 100, the middle portion of which leaf spring body 100 can be secured to a coupler 260 of an axle 250 by two U-bolts and nuts (e.g., U-bolt 230 and the nut of U-bolt 230 shown in the figures). The ends of the leaf spring body 100 may be nested within the spring mounts (the spring mount 210 and the spring mount 220 as shown) that are secured to the frame. Of course, in another implementation, the two ends of the plate spring body 100 may also be fixedly provided with metal rolling lugs fixedly connected with the frame, and the middle part of the plate spring body is fixed on the axle through a U-shaped bolt.

The process of forming a composite leaf spring is generally classified into a continuous filament winding (FILAMENT WINDING) process and a molding (Compressing Molding) process.

The filament winding process may wind the resin-impregnated filament on a mold having a fixed shape and then cure the same to obtain a molded product. However, the strength of the fiber winding process is greatly affected by the bonding degree among fiber filaments, and the phenomena of weak interlayer bonding force, easiness in splitting and the like exist, so that the fatigue resistance and strength of the product are lower, and the performance requirement of the plate spring cannot be well met. Therefore, the composite plate spring developed by most manufacturers adopts a die pressing process, the precision is high relative to that of a fiber winding process, the surface of the product is smooth after the product is molded, and secondary processing is not needed. Resin Transfer Molding (RTM) is a typical Molding process. Specifically, a preformed fiber reinforced material is paved in a die cavity, the die is required to be sealed and fastened at the periphery, and the resin can flow smoothly inside; and injecting quantitative resin after the mold is closed, and demolding after the resin is solidified to obtain the expected composite plate spring body.

In view of the above, the present application provides an embedded plate spring body, a plate spring body fitting and a plate spring assembly, which can reduce the maintenance frequency of the plate spring body and ensure the safety of using the plate spring body on the basis of ensuring the service life of the plate spring body.

The embedded plate spring body provided by the application is described in detail below.

In some embodiments, the leaf spring body has a parabolic structure with a convex surface being an upper surface of the leaf spring body and a concave surface being a lower surface of the leaf spring body; a top plate is arranged in the middle area of the upper surface and a bottom plate is arranged in the middle area of the lower surface along the length direction of the plate spring body, and side plates are arranged on the side surfaces of the plate spring body, which are perpendicular to the width direction of the plate spring body; the top plate and/or the bottom plate are/is used as limiting plates of the side plates and used for limiting or controlling the movement of the side plates along the width direction.

Illustratively, the side surface is a side surface of the leaf spring body along a length direction of the leaf spring body.

For example, only the top plate may be used as the limiting plate, only 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, and both the top plate and the bottom plate.

Illustratively, the side plates may be configured to nest within the stop plates for the purpose of limiting or controlling movement of the side plates in the width direction. For example, the stopper plate may protrude outward in the width direction with respect to the side surface and be formed with a first region into which the side plate is disposed.

The side plate may or may not be fixed with respect to the limiting plate.

Wherein, the curb plate is fixed relative the limiting plate, just the limiting plate can be used to: restricting movement of the side plates in the width direction; the side plates are not fixed relative to the limiting plates and the limiting plates can be used for: limiting or controlling movement of the side plates in the width direction.

For example, the side plate may be restrained by being embedded in the restraining plate and fixed to the restraining plate so that the restraining plate may restrain the movement of the side plate in the width direction.

For another example, the side plate may be limited by being embedded in the limiting plate and fixed to the side surface by an adhesive such that the limiting plate may limit or control the movement of the side plate in the width direction.

In this embodiment, the top plate and/or the bottom plate are used as a limiting plate of the side plate, so as to limit or control the movement of the side plate along the width direction, so that on one hand, the damage to the structure of the leaf spring body is avoided, and further the service life of the leaf spring body can be ensured; on the other hand, through spacing the curb plate in width direction, reduced the possibility that the curb plate drops, and then can reduce the maintenance frequency of leaf spring body and guarantee the security of using the leaf spring body.

In some embodiments, the thickness of the leaf spring body is greatest and the width is smallest at an intermediate location, the thickness of the leaf spring body is smallest and the width is greatest at both ends of the leaf spring body, a transition region exists between the intermediate location and either end, the thickness of the leaf spring body in the transition region gradually decreases in a direction from the intermediate location to the either end, and the width of the leaf spring body in the transition region gradually increases in a direction from the intermediate location to the either end.

Because the plate spring body is in the middle part of plate spring body in the in-service use, the biggest position of this plate spring body bearing pressure is consequently, and the thickness of this plate spring body in intermediate position department is biggest and width is minimum to and this plate spring body is when the thickness of this plate spring body in the both ends department is minimum and width is biggest, can promote the extreme value of the pressure that the plate spring body (i.e. the middle part of this plate spring body) bears, and then promotes the mechanical properties of plate spring body. In addition, through introducing this transition region, can avoid this leaf spring body to appear the concentrated abrupt change structure of atress, the effort that reduces this leaf spring body in this transition region department as far as, and then can promote the mechanical properties of this leaf spring body.

It should be understood that the present application is not limited to specific values of the width of the leaf spring body at each position, the length of the leaf spring body at each position, and the thickness of the leaf spring body at each position. The width of the plate spring body at each position is the dimension along the width direction of the plate spring body, the length of the plate spring body at each position is the dimension along the length direction of the plate spring body, and the thickness of the plate spring body at each position is the dimension along the thickness direction of the plate spring body.

The top plate, and the side plates may be plates made of any material having a strength satisfying a certain requirement. For example, the top plate, and the side plates may be steel plates having a strength greater than or equal to a preset strength. The preset strength may be determined based on the size of the leaf spring body or the applicable scene of the leaf spring body. For example, the preset strength may be positively correlated based on the size of the leaf spring body, and for example, the preset strength may be positively correlated based on the load of a vehicle to which the leaf spring body is applied.

Illustratively, the dimensions of the top panel are such that the side panels can be embedded into the top panel,

Illustratively, the maximum width of the top panel is greater than or equal to the width of the intermediate region. Wherein, the maximum width of roof is: the top plate has a maximum dimension in a width direction of the leaf spring body. For example, when the widths at any positions of the top plate are the same, the widths at the any positions are larger than the widths of the intermediate regions; description: along the width direction of the leaf spring body, both side edge regions of the top plate protrude outward with respect to the leaf spring body, in which case the side plates may be embedded into both side edge regions. For another example, when the widths of the top plate at different positions are different, the maximum width of the top plate may be equal to the width of the middle region; description: in the width direction of the leaf spring body, a partial edge region of the top plate protrudes outward with respect to the leaf spring body, in which case the side plate may be fitted into the partial edge region.

For example, the maximum width of the top plate may have a value ranging from 40mm to 150mm.

Illustratively, the length of the top plate may be any value that is less than the length of the leaf spring body.

For example, the length of the top plate is in the range of 40mm to 300mm.

It should be understood that the present application is not limited to specific values of the width of the top plate, the length of the top plate, and the thickness of the top plate. The width of roof is along the width direction's of leaf spring body size, the length of roof is along the length direction's of leaf spring body size, the thickness of roof is along the thickness direction's of leaf spring body size. In addition, the size of the bottom plate and the size of the top plate may be the same or different.

Illustratively, the side panels are sized to ensure that the side panels can be embedded into the top panel.

Illustratively, the side plate has a thickness greater than a thickness of the leaf spring body.

It should be understood that the present application is not limited to specific values of the width of the top plate, the length of the top plate, and the thickness of the top plate. The width of the side plate is the dimension along the width direction of the plate spring body, the length of the side plate is the dimension along the length direction of the plate spring body, and the thickness of the side plate is the dimension along the thickness direction of the plate spring body.

It should be understood that the specific structure of the leaf spring body is not limited by the present application. For example, an engagement surface may be formed between the upper surface of the plate spring body and the side surface of the plate spring body, and/or between the lower surface of the plate spring body and the side surface of the plate spring body, and the engagement surface may be a surface formed with a stepped structure, a cambered surface, or a beveled surface, etc., which is not particularly limited in the present application.

It should be noted that the various value ranges provided by the present application are merely examples of the present application, and should not be construed as limiting the present application. For example, the maximum width of the top plate may be a value other than 40mm to 150mm, and for example, the length of the top plate may be a value other than 40mm to 300 mm.

In some embodiments, the limiting plate is formed with at least one first through hole for receiving at least one first projection formed by the side plate.

Illustratively, when only the top plate is used as the limiting plate, the at least one first through hole is used for accommodating at least one first protruding structure formed at the upper end of the side plate. When the bottom plate is used as the limiting plate only, the at least one first through hole is used for accommodating at least one first protruding structure formed at the lower end of the side plate. When the top plate and the bottom plate are used as the limiting plates at the same time, the at least one first through hole is used for accommodating at least one first protruding structure formed by the side plates, and the at least one first protruding structure formed by the side plates comprises: at least one first projection formed at an upper end of the side plate and at least one first projection formed at a lower end of the side plate. The upper end of the side plate is the end part of the side plate, which is contacted with the top plate, and the lower end of the side plate is the end part of the side plate, which is contacted with the bottom plate.

For example, the shape of the first through hole on the upper surface or the lower surface of the limiting plate may be a regular or irregular shape such as a circle, a rectangle, or the like.

Of course, in other alternative embodiments, the first through hole may be replaced by a groove that does not pass through the limiting plate, which is not particularly limited by the present application. For example, the limiting plate is formed with at least one receiving groove for receiving at least one first projection structure formed at an upper end of the side plate. Even further, the stopper plate may form a baffle on the outer side of the side plate to restrict or control the movement of the side plate in the width direction.

The first through hole is used for limiting the side plate in the length direction and/or the width direction of the plate spring body. For example, the inner side surface of the first through hole may include a vertical surface for restricting the side plate in the length direction and/or the width direction of the plate spring body, the vertical surface being parallel to the side surface of the plate spring body.

Illustratively, the first through hole is used for limiting the side plate in the thickness direction of the plate spring body. For example, the inner side surface of the first through hole may include a horizontal plane for restricting the side plate in the thickness direction of the plate spring body, the horizontal plane being parallel to the upper surface or the lower surface of the plate spring body.

Illustratively, the first bump structure is a via that mates with the first via structure.

For example, the first protruding structure is matched with the structure of the first through hole, and the size of the first protruding structure is the same as that of the first through hole, so that the side plate is embedded and fixed to the limit plate.

For another example, the first protruding structure is matched with the structure of the first through hole, and the size of the first protruding structure is smaller than that of the first through hole, so that when the side plate is embedded into the limiting plate, the side plate can move relative to the limiting plate, and in this case, the side plate can be fixed with the side surface through adhesive.

In this embodiment, through at least one first through-hole holds at least one first protruding structure that the upper end of curb plate formed has realized to the curb plate is spacing, has reduced the possibility that the curb plate drops, and then, can reduce the maintenance frequency of this leaf spring body and guarantee the security of using this leaf spring body.

Of course, in other alternative embodiments, the limiting plate may further have a second through hole formed thereon for receiving a fastener of the limiting plate, which is not particularly limited by the present application. For example, the fastener may be a bolt or other structural member. For another example, the size of the second through hole may be larger than the size of the first through hole.

In some embodiments, the side plate is fixed to the side surface by an adhesive, and a first gap is formed between a first inner side surface of the first through hole and parallel to the side surface and the first protrusion structure.

Illustratively, the first inside surface is: the first through hole is adjacent to an inner side surface of the plate spring body in the width direction.

In other words, the first inner side surface is an inner side surface that is close to the leaf spring body in the width direction, and the first inner side surface is parallel to a side surface perpendicular to the width direction of the leaf spring body.

Illustratively, the first inside surface is: an inner side surface of the first through hole and remote from the leaf spring body in the width direction.

In other words, the first inner side surface is an inner side surface that is distant from the leaf spring body in the width direction, and the first inner side surface is parallel to a side surface perpendicular to the width direction of the leaf spring body.

Illustratively, the first raised structure is a structural match to the first through hole, and the first raised structure has a size that is smaller than a size of the first through hole so as to form the first gap between the first inner side surface and the first raised structure.

In this embodiment, form first clearance between first medial surface with first protruding structure, when the lateral stress that the leaf spring body received is great, the leaf spring body can carry the curb plate is followed in the width direction move in the first clearance, can cushion the stress that paste the gum bore, can avoid as far as possible because the leaf spring body receives the too big problem that leads to paste gum to be torn between curb plate and the leaf spring body of lateral stress, and then can be in the curb plate pass through paste gum with under the fixed circumstances of side surface, reduce the maintenance frequency of leaf spring body and guarantee the security of using the leaf spring body.

In some embodiments, the thickness of the first gap is less than or equal to the thickness of the adhesive.

In this embodiment, the thickness of the first gap is smaller than or equal to the thickness of the adhesive tape, so that the buffering effect of the first gap for buffering the stress borne by the adhesive tape can be ensured. Of course, in other alternative embodiments, the thickness of the first gap may be greater than or equal to the thickness of the adhesive, which is not particularly limited by the present application.

In some embodiments, the value range of the first gap is 0.05 mm-20 mm.

In this embodiment, the lower limit value of the value range of the first gap is set to 0.05mm, and the upper limit value of the value range of the first gap is set to 20mm, so that the thickness of the first gap can be prevented from being too large or too small, and the buffering effect of the first gap for buffering the stress born by the adhesive can be further ensured.

In some embodiments, a resilient gasket or filler material is disposed within the first gap.

Illustratively, the resilient gasket may be a gasket having a strength less than the side plate.

The elastic pad may be a pad having elasticity greater than that of the side plate, for example.

Illustratively, the filler material may be a sticker or other elastic material.

Illustratively, the filler material may be a flexible material.

In some embodiments, a first side surface of the plate spring body perpendicular to the width direction is provided with a first side plate, a second side surface of the plate spring body opposite to the first side surface is provided with a second side plate, and 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 for limiting the movement of the first side plate in a direction approaching the second side plate, and the second row of through holes is used for limiting the movement of the second side plate in a direction approaching the first side plate; or the first row of through holes is used for limiting 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 for limiting the movement of the second side plate in the direction away from the first side plate.

In this embodiment, the restricting direction of the first through hole is differentiated in units of rows, so that the limiting plate can control the movement of the first side plate and the second side plate in the direction approaching (or separating) the leaf spring body on the basis of restricting the movement of the first side plate and the second side plate in the direction separating (or separating) from the leaf spring body.

For example, the first row of first through holes is used for limiting the movement of the first side plate in the direction approaching the second side plate, and the second row of through holes is used for limiting the movement of the second side plate in the direction approaching the first side plate, so that the limiting plate can control the movement of the first side plate and the second side plate in the direction far away from the plate spring body on the basis of limiting the movement of the first side plate and the second side plate in the direction approaching the plate spring body. For another example, the first row of through holes is used for limiting the movement of the first side plate along the direction away from the second side plate, and the second row of through holes is used for limiting the movement of the second side plate along the direction away from the first side plate, so that the limiting plate can control the movement of the first side plate and the second side plate along the direction close to the plate spring body on the basis of limiting the movement of the first side plate and the second side plate along the direction away from the plate spring body.

Illustratively, the first row of first through holes is configured to receive a first raised structure formed on the first side plate, and the first row of first through holes is configured to receive a first raised structure formed on the second side plate.

Illustratively, the first side plate and the second side plate are disposed in parallel.

Illustratively, the first row of first through holes and the second row of first through holes are provided at both side edge regions of the stopper plate that protrude outward with respect to the plate spring body.

Illustratively, the first row of first through holes and the second row of first through holes are symmetrically disposed.

The first row of first through holes and the second row of first through holes are arranged in a staggered mode, so that the uniformity of the first through holes in space is improved, and the limiting effect of the first through holes is improved. For example, the first through holes and the second through holes are provided in two side edge regions of the limiting plate protruding outward in the width direction with respect to the plate spring body, and when one side edge region of the two side edge regions is provided with two adjacent first through holes in the first through holes, the other side edge region of the two side edge regions is provided with one first through hole in the second through holes in the second row, corresponding to the middle position of the two adjacent first through holes.

Illustratively, the first side plate and the second side plate are both fixed to a side surface of the plate spring body perpendicular to a width direction of the plate spring body by means of adhesive, and a first gap is formed between a first inner side surface of any one of the first through holes and parallel to the side surface and a first projection structure received by the any one of the first through holes for any one of the first through holes and the second through holes.

It should be appreciated that the related scheme of the first gap may refer to the scheme described above, and will not be repeated herein.

For example, the first inner side surface of any one of the first through holes may be: the inner side surface of any one of the first through holes is close to the plate spring body in the width direction. Thereby, the first side plate and the second side plate can be controlled to move in the direction approaching the leaf spring body on the basis of restricting the movement of the first side plate and the second side plate in the direction moving away from the leaf spring body.

Specifically, the first inner side surface of the arbitrary one of the first through holes is the inner side surface of the arbitrary one of the first through holes and is close to the plate spring body in the width direction, the first gap may be made to restrict the movement of the first side plate and the second side plate in the direction away from the plate spring body, and the width of the first gap may control the movement of the first side plate and the second side plate in the direction close to the plate spring body.

For another example, the first inner side surface of any one of the first through holes may be: the inner side surface of any one of the first through holes is close to the plate spring body in the width direction. Thereby, the first side plate and the second side plate can be controlled to move in the direction away from the leaf spring body on the basis of restricting the movement of the first side plate and the second side plate in the direction toward the leaf spring body.

Specifically, the first inner side surface of the arbitrary one of the first through holes is the inner side surface of the arbitrary one of the first through holes and is close to the plate spring body in the width direction, the first gap may be made to restrict the movement of the first side plate and the second side plate in the direction close to the plate spring body, and the width of the first gap may control the movement of the first side plate and the second side plate in the direction away from the plate spring body.

In some embodiments, a width of a first through hole of the at least one first through hole, which is close to a middle position of the limiting plate in the length direction, is greater than a width of a first through hole of the at least one first through hole, which is close to an edge position of the limiting plate in the length direction; and/or the length of the first through hole, which is close to the middle position of the limiting plate along the length direction, of the at least one first through hole is greater than the length of the first through hole, which is close to the edge position of the limiting plate along the length direction, of the at least one first through hole.

Illustratively, the at least one first through hole is provided in two side edge regions of the limiting plate protruding outward in a width direction relative to the plate spring body, and for any one side edge region of the two side edge regions, a width of a first through hole of the at least one first through hole, which is close to an intermediate position of the any one side edge region in the length direction, is larger than a width of a first through hole of the at least one first through hole, which is close to an edge position of the any one side edge region in the length direction; or the length of the first through hole, which is close to the middle position of the edge area on any side along the length direction, of the at least one first through hole is larger than the length of the first through hole, which is close to the edge position of the edge area on any side along the length direction, of the at least one first through hole.

Because the middle area close to the plate spring body is a concentrated stress area, in the embodiment, the width of the first through hole, which is close to the middle position of the limiting plate along the length direction, in the at least one first through hole is larger than the width of the first through hole, which is close to the edge position of the limiting plate along the length direction, in the at least one first through hole; or the length of the first through hole, which is close to the middle position of the limiting plate along the length direction, of the at least one first through hole is larger than that of the first through hole, which is close to the edge position of the limiting plate along the length direction, of the at least one first through hole; the first through holes, which are close to the edge of the limiting plate along the length direction, in the at least one first through hole are opposite to the first through holes, the buffering effect of the first through holes, which are close to the middle position of the limiting plate along the length direction, on the lateral stress can be increased, and then the lateral stress born by each part of the side plate can be balanced, namely, the service life of the first protruding structure contained in the first through holes, which are close to the middle position of the limiting plate along the length direction, in the at least one first through hole is prolonged, and the service frequency of the plate spring body can be reduced, and the safety of the plate spring body can be guaranteed.

In some embodiments, the limiting plate extends outward in the width direction at an edge region of the at least one first through hole to form at least one second protrusion structure, and the length of the second protrusion structure is greater than that of the first through hole.

Illustratively, the second bump structures have equal widths at any location.

For example, the second bump structure may be a structure that mates with a part of the inner side surface of the first through hole, in which case the width of the second bump structure at any position is equal.

For example, when the shape of the first through hole on the upper surface or the lower surface of the limiting plate is circular (or rectangular), the shape of the second protrusion structure on the upper surface or the lower surface of the limiting plate is also semicircular (or rectangular).

Illustratively, the widths of the second bump structures at different locations may not be equal.

For example, the second bump structure may be a structure that does not match an inner side surface of the first through hole. In this case, the widths of the second bump structures at different positions may not be equal.

For example, when the shape of the first through hole on the upper surface or the lower surface of the limiting plate is circular, the shape of the second protruding structure on the upper surface or the lower surface of the limiting plate may be rectangular or other shapes different from circular.

In this embodiment, along the width direction, the limiting plate is in the edge region of at least one first through hole outwards extends to form at least one second protruding structure, can reduce the limiting plate is right the lateral stress that the curb plate bore appears when buffering the cracked possibility of edge region of first through hole, and then protection first through hole has promoted the life of first through hole is equivalent to, can reduce the maintenance frequency of leaf spring body and guarantee the security of using the leaf spring body.

In some embodiments, the aspect ratio of the second bump structure is greater than the aspect ratio of the first via.

Illustratively, the aspect ratio of the second bump structure may be: a ratio of a length of the second raised structure to a width of the second raised structure. For example, when the second bump structure is an irregular structure, the aspect ratio of the second bump structure may be: a ratio of a maximum length of the second raised structures to a maximum width of the second raised structures.

Illustratively, the aspect ratio of the first via may be: a ratio of a length of the first via to a width of the first via. For example, when the first via is an irregular via, the aspect ratio of the first via may be: a ratio of a maximum length of the first through hole to a maximum width of the first through hole.

In this embodiment, the aspect ratio of the second protruding structure is greater than that of the first through hole, so that the second protruding structure can play a role in protecting the first through hole on the basis of avoiding the influence on the installation of the leaf spring body caused by the oversized second protruding structure as much as possible.

Illustratively, the second raised structures have a length that is greater than the length of the first via and a width that is less than the width of the first via. For example, the maximum length of the second bump structure is greater than the maximum length of the first through hole, and the maximum width of the second bump structure is less than the maximum width of the first through hole. Therefore, the aspect ratio of the second protruding structure can be ensured to be larger than that of the first through hole, and the second protruding structure can protect the first through hole.

Illustratively, the dimension of the second raised structure is positively correlated with the dimension of the first through hole.

Illustratively, the width of the second bump structure ranges from 0.1mm to 30mm.

Illustratively, the length of the second bump structure ranges from 1mm to 150mm.

In this embodiment, the lower limit value of the width of the second bump structure is set to 0.1mm or the lower limit value of the length range is set to 1mm, so that the second bump structure can protect the first through hole; in addition, the upper limit value of the value range of the width of the second protruding structure is set to 30mm or the upper limit value of the length range is set to 150mm, so that the influence on the installation of the leaf spring body caused by the oversized second protruding structure can be avoided, namely, the practicability of the leaf spring body can be ensured.

It should be understood that the present application is not limited to specific values of the width of the second bump structure and the length of the second bump structure. For example, the width of the second bump structure or the length of the second bump structure may be a value outside the above-mentioned range of values. Wherein the width of the second protrusion structure is a dimension along the width direction of the plate spring body. The length of the second protruding structure is the dimension along the length direction of the plate spring body.

Illustratively, the size of the first through hole is positively correlated with the size of the side plate. For example, the length of the first through hole is positively correlated with the length of the side plate. For another example, the width of the first through hole is positively correlated with the width of the side plate.

Illustratively, the width of the first through hole ranges from 0.5mm to 30mm.

Illustratively, the length of the first through hole ranges from 0.2mm to 150mm.

In this embodiment, the lower limit value of the value range of the width of the first through hole is set to 0.5mm or the lower limit value of the value range of the length of the first through hole is set to 0.2mm, so that the first through hole can play a role in limiting the side plate; in addition, the upper limit value of the value range of the width of the first through hole is set to 30mm or the upper limit value of the value range of the length of the first through hole is set to 150mm, so that the influence on the installation of the plate spring body caused by the overlarge size of the first through hole can be avoided, namely, the practicability of the plate spring body can be ensured.

It should be understood that the specific values of the width of the first through hole and the length of the first through hole are not limited in the present application. For example, the width of the first through hole or the length of the first through hole may be other values than the above range of values. Wherein the width of the first through hole is a dimension along the width direction of the plate spring body. The length of the first through hole is the dimension along the length direction of the plate spring body.

In some embodiments, a side surface of the stopper plate perpendicular to the width direction is formed with at least one first groove for receiving a U-bolt for fixing the plate spring body to an axle.

For example, the U-bolt may also be referred to as a saddle bolt.

Illustratively, the number of the at least one first groove is equal to the number of the U-bolts.

In this embodiment, the side surface of limiting plate is formed with and holds with at least one first recess of the U-shaped bolt that the leaf spring body is fixed on the axletree, not only can save the occupation space of U-shaped bolt, can also realize right the spacing of U-shaped bolt, and then reduced the installation complexity of U-shaped bolt and promoted installation effectiveness.

In some embodiments, the depth of the first groove ranges from 0.1mm to 60mm, and the width of the first groove ranges from 2mm to 150mm.

In this embodiment, the lower limit value of the range of the depth of the first groove is set to 0.1mm, and the lower limit value of the range of the width of the first groove is set to 2mm, so that the first groove can be ensured to be capable of accommodating the U-shaped bolt; in addition, the upper limit value of the range of the depth of the first groove is set to be 60mm, and the upper limit value of the range of the width of the first groove is set to be 150mm, so that the first groove can be ensured to play a role of accommodating any specification of U-shaped bolts, and the influence on the installation of the leaf spring body caused by the oversized first groove can be avoided, namely the practicability of the leaf spring body can be ensured.

It should be understood that the present application is not limited to specific values of the depth of the first groove and the width of the first groove. The depth of the first groove or the width of the first groove may be other values than the above range of values. The depth of the first groove is the dimension along the width direction of the plate spring body, and the width of the first groove is the dimension along the length direction of the plate spring body.

In some embodiments, the side plate is formed with at least one second groove through the at least one first groove for receiving the U-bolt.

In this embodiment, the curb plate be formed with at least one first recess link up and be used for holding the at least one second recess of U-shaped bolt, not only can save the occupation space of U-shaped bolt, can also realize right the spacing of U-shaped bolt, and then reduced the installation complexity of U-shaped bolt and promoted installation effectiveness.

In some embodiments, the top plate and the bottom plate both act as the limiting plate; or the top plate is used as the limiting plate, and the side plates and the bottom plate form a non-detachable U-shaped structure; or the bottom plate is used as the limiting plate, and the side plates and the top plate form a non-detachable U-shaped structure.

Illustratively, the side plate and the bottom plate form a non-detachable U-shaped structure, and the edge position of the bottom plate extends upwards to form the side plate, so that the side plate and the bottom plate can form the non-detachable U-shaped structure.

Illustratively, the side plate and the top plate form a non-detachable U-shaped structure, and the edge position of the top plate may extend downward to form a side plate, so that the side plate and the bottom plate may form a non-detachable U-shaped structure.

Illustratively, when the top plate and the bottom plate are both the limiting plates, the top plate and the bottom plate are used for limiting or controlling the movement of the side plates in the width direction; when the top plate is used as the limiting plate, the top plate is used for: limiting or controlling movement of a non-detachable U-shaped structure formed by the side plates and the bottom plate in the width direction; when the bottom plate is used as the limiting plate, the bottom plate is used for: the movement of the non-detachable U-shaped structure formed by the side plates and the top plate in the width direction is restricted or controlled.

In this embodiment, the top plate and the bottom plate are both used as the limiting plate, so that the limiting effect of the limiting plate can be improved. The side plates and the bottom plate are designed to be of a non-detachable U-shaped structure, or the side plates and the top plate are designed to be of a non-detachable U-shaped structure, so that the installation complexity of the plate spring body can be reduced.

It should be understood that, in the present application, when the top plate and the bottom plate are both used as the limiting plates, the lower ends of the side plates may be embedded in the bottom plate in the same manner as or different from the upper ends of the side plates.

The structure of the leaf spring body provided by the present application will be described below with reference to the accompanying drawings.

As shown in fig. 3, the plate spring body 100 has a parabolic structure, the convex surface of the plate spring body 100 is an upper surface 111 of the plate spring body 100, the concave surface of the plate spring body 100 is a lower surface 112 of the plate spring body 100, and a side surface of the plate spring body 100 is formed between the upper surface 111 and the lower surface 112. Further, the thickness of the plate spring body 100 at the intermediate position is maximum and the width thereof is minimum, the thickness of the plate spring body 100 at both ends of the plate spring body 100 is minimum and the width thereof is maximum, a transition region exists between the intermediate position and any one of the ends, the thickness of the plate spring body 100 at the transition region gradually decreases in the direction from the intermediate position to the any one of the ends, and the width of the plate spring body 100 at the transition region gradually increases in the direction from the intermediate position to the any one of the ends, so as to improve the mechanical properties of the plate spring body 100.

As shown in fig. 4, a top plate 310 is provided at a middle region of the upper surface and a bottom plate 320 is provided at a middle region of the lower surface along a length direction of the plate spring body 100; wherein, the side surface of the plate spring body perpendicular to the width direction of the plate spring body is provided with a side plate 330 embedded in the top plate 310 and the bottom plate 320, i.e. the top plate 310 and the bottom plate 320 serve as a limiting plate of the side plate 330 for limiting or controlling the movement of the side plate 330 in the width direction.

In this embodiment, by providing the side plate 330 embedded in the top plate 310 on the side surface of the leaf spring body 100 perpendicular to the width direction of the leaf spring body, on one hand, damage to the structure of the leaf spring body 100 is avoided, and thus the service life of the leaf spring body 100 can be ensured; on the other hand, the design of embedding the side plate 330 into the top plate 310 limits the side plate 330, so that the possibility of falling off of the side plate 330 is reduced, and further, the maintenance frequency of the plate spring body 100 can be reduced, and the safety of using the plate spring body 100 is ensured.

As shown in fig. 5, the lower end of the side plate 330 may also be embedded in the bottom plate 320. The bottom plate 330 has the same structure as the top plate 310, and the lower ends of the side plates 330 are embedded in the bottom plate 320 in the same manner as the upper ends of the side plates 330 are embedded in the top plate 310.

As shown in fig. 6, the width of the plate spring body 100 at the intermediate position is minimum, the width of the plate spring body 100 at both ends of the plate spring body 100 is maximum, a transition region exists between the intermediate position and either end, and the width of the plate spring body 100 at the transition region gradually increases in the direction from the intermediate position to either end, so as to improve the mechanical properties of the plate spring body 100. Further, an engagement surface is formed between the upper surface of the plate spring body 100 and the side surface of the plate spring body. The engagement surface is a cambered surface.

As shown in fig. 7, the maximum width d0 of the top plate 310 has a range of values: 40 mm-150 mm. The length d1 of the top plate 310 has a range of values: 40 mm-300 mm.

In addition, the top plate 310 may include the first through hole 311 or the first through hole 314 for receiving a first protrusion structure formed at an 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. Wherein 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 smaller 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.

For example, d2 is in the range of 0.5mm to 30mm.

D3 is 0.2 mm-150 mm.

D4 is 0.05 mm-20 mm in value range.

The length of the first through hole 314 ranges from 2mm to 150mm.

In this embodiment, since the first through hole 314 is a region with concentrated stress, the length d3 of the first through hole 311 is smaller than the length of the first through hole 314, which can increase the buffering effect of the first through hole 314 on the lateral stress relative to the first through hole 311, and further improve the service life of the first through hole 314, which is equivalent to reducing the maintenance frequency of the plate spring body 100 and ensuring the safety of using the plate spring body 100.

As shown in fig. 7, in the width direction of the leaf spring body 100, the top plate 310 is formed with a second protrusion structure 313 extending outward at an edge region of the first through hole 311, and the top plate 310 is formed with a second protrusion structure 316 extending outward at an edge region of the first through hole 314. Wherein the width d5 of the second bump structure 313 is the same as the width of the second bump structure 316, and the length d6 of the second bump structure 313 is smaller than the length d9 of the second bump structure 316.

For example, d5 is in the range of 0.1mm to 30mm.

D6 is 1 mm-150 mm.

D9 is 2 mm-150 mm.

In this embodiment, along the width direction, the second protrusion structure 313 may reduce the possibility of breaking the edge region of the side plate 311 when the top plate 310 buffers the lateral stress borne by the side plate 330, and the second protrusion structure 316 may reduce the possibility of breaking the edge region of the side plate 314 when the top plate 310 buffers the lateral stress borne by the side plate 330, so as to further improve the service lives of the first through hole 311 and the first through hole 314, which is equivalent to reducing the maintenance frequency of the plate spring body 100 and ensuring the safety of using the plate spring body 100.

As shown in fig. 7, a side surface of the top plate 310 is formed with a first groove 317 for receiving a U-bolt for fixing the plate spring body 100 to an axle.

Wherein the value range of the width d7 of the first groove is 2 mm-150 mm.

The depth d8 of the first groove 317 ranges from 0.1mm to 60mm.

As shown in fig. 7, the top plate 310 may also be formed with a second through hole 318 through the top plate 310, the second through hole 318 being operable to receive a fastener that secures the top plate 310 to the leaf spring body 100. The fastener may be a bolt.

It should be understood that fig. 7 is only an example of the present application and should not be construed as limiting the present application. For example, in other alternative embodiments, only the top plate 310 or the bottom plate 320 may be used as a limiting plate of the side plate 330 for limiting or controlling the movement of the side plate 330 in the width direction. For another example, the side plate of the leaf spring body opposite the side plate 330 may not be embedded in the top plate 310 and/or the bottom plate 320. d0 to d9 may be values other than the above-mentioned value ranges, or the top plate 310 may include only one row of the first through holes, or the first gap 312 may be located outside the first through holes 311, or the first gap 315 may be located outside the first through holes 314, which is not particularly limited in the present application.

As shown in fig. 8, compared to the top plate 310 shown in fig. 7, the side surface of the top plate 310 shown in fig. 8 may not be formed with a first groove 317 for receiving a U-bolt for fixing the plate spring body 100 to an axle. Other structures and reference numerals may be referred to in the description of fig. 7, and are not repeated here.

The present application also provides a plate spring body fitting for a plate spring comprising the top plate, bottom plate and side plate to which the plate spring body referred to above is fitted.

For example, the leaf spring body fitting may include a top plate, a bottom plate, and side plates as shown in fig. 5.

The application also provides a plate spring assembly, which comprises the plate spring body, wherein two ends of the plate spring body are nested on plate spring seats, the plate spring seats are fixedly connected with a vehicle frame, and the middle part of the plate spring body is fixed on an axle through a U-shaped bolt.

The application also provides a leaf spring assembly which comprises the leaf spring body, wherein metal rolling lugs are fixedly arranged at two ends of the leaf spring body, the metal rolling lugs are fixedly connected with the frame, and the middle part of the composite leaf spring body is fixed on an axle through a U-shaped bolt.

It should be appreciated that the present application relates to leaf spring body fittings and leaf spring assemblies in accordance with aspects of the present application and that reference is made to the above description of the insert-assembled leaf spring body, and that no further description is provided herein for the purpose of avoiding repetition. It should also be understood that the leaf spring body, the composite leaf spring and the composite leaf spring body described in the specification of the present application may be resin-based fiber composite leaf spring bodies, which may also be simply referred to as leaf springs, and the present application is not limited thereto.

It should be noted that, on the premise of no conflict, the embodiments and/or technical features in the embodiments described in the present application may be combined with each other arbitrarily, and the technical solutions obtained after combination should also fall into the protection scope of the present application.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An embedded assembled leaf spring body, the leaf spring body having a parabolic structure with a convex surface being an upper surface of the leaf spring body and a concave surface being a lower surface of the leaf spring body;

It is characterized in that the method comprises the steps of,

A top plate is arranged in the middle area of the upper surface and a bottom plate is arranged in the middle area of the lower surface along the length direction of the plate spring body, and side plates are arranged on the side surfaces of the plate spring body, which are perpendicular to the width direction of the plate spring body; the top plate and/or the bottom plate are/is used as limiting plates of the side plates and used for limiting or controlling the movement of the side plates along the width direction.

2. The leaf spring body of claim 1 wherein the limiting plate is formed with at least one first through hole for receiving at least one first projection arrangement on the side plate.

3. The leaf spring body of claim 2, wherein the side plate is secured to the side surface by an adhesive, and wherein a first gap is formed between a first inner side surface of the first through hole parallel to the side surface and the first projection structure.

4. The leaf spring body of claim 3 wherein the thickness of the first gap is less than or equal to the thickness of the paste.

5. The leaf spring body of claim 3, wherein the first gap has a value in the range of 0.05mm to 20mm.

6. A leaf spring body according to claim 3, wherein a resilient spacer or filler material is provided in the first gap.

7. The plate spring body according to claim 2, wherein a first side surface of the plate spring body perpendicular to the width direction is provided with a first side plate, a second side surface of the plate spring body opposite to the first side surface is provided with a second side plate, and 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 for limiting the movement of the first side plate in a direction approaching the second side plate, and the second row of first through holes is used for limiting the movement of the second side plate in a direction approaching the first side plate; or the first row of first through holes is used for limiting the movement of the first side plate along the direction deviating from the second side plate, and the second row of first through holes is used for limiting the movement of the second side plate along the direction deviating from the first side plate.

8. The plate spring body according to claim 2, wherein a width of a first through hole of the at least one first through hole, which is closer to a middle position of the limiting plate in the length direction, is larger than a width of a first through hole of the at least one first through hole, which is closer to an edge position of the limiting plate in the length direction; and/or

The length of the first through hole, which is close to the middle position of the limiting plate along the length direction, of the at least one first through hole is larger than that of the first through hole, which is close to the edge position of the limiting plate along the length direction, of the at least one first through hole.

9. The plate spring body according to claim 2, wherein the stopper plate is formed with at least one second protrusion structure extending outwardly from an edge region of the at least one first through hole in the width direction, the second protrusion structure having a length greater than that of the first through hole.

10. The leaf spring body of claim 9, wherein the second projection arrangement has an aspect ratio that is greater than an aspect ratio of the first through hole.

11. The plate spring body according to any one of claims 1 to 10, wherein a side surface of the stopper plate perpendicular to the width direction is formed with at least one first groove for receiving a U-bolt that fixes the plate spring body to an axle.

12. The leaf spring body of claim 11, wherein the depth of the first groove ranges from 0.1mm to 60mm, and the width of the first groove ranges from 2mm to 150mm.

13. The leaf spring body of claim 11 wherein the side plate is formed with at least one second groove therethrough with the at least one first groove for receiving the U-bolt.

14. The leaf spring body according to any one of claims 1 to 10, wherein the top plate and the bottom plate each serve as the limiting plate; or the top plate is used as the limiting plate, and the side plates and the bottom plate form a non-detachable U-shaped structure; or the bottom plate is used as the limiting plate, and the side plates and the top plate form a non-detachable U-shaped structure.

15. An insert-fitted leaf spring body fitting, comprising:

The top plate, bottom plate and side plates to which the leaf spring body is fitted according to any one of claims 1 to 13.

16. A leaf spring assembly, comprising:

The leaf spring body according to any one of claims 1 to 14, having both ends nested on leaf spring seats fixedly connected to a vehicle frame, the middle part of the leaf spring body being fixed to an axle by a U-bolt; or alternatively

The leaf spring body according to any one of claims 1 to 14, wherein metal lugs are fixedly arranged at two ends of the leaf spring body, the metal lugs are fixedly connected with a vehicle frame, and the middle part of the leaf spring body is fixed on an axle through a U-shaped bolt.