CN118375679A - Composite material rear leaf spring assembly - Google Patents

Abstract

The application relates to a composite rear leaf spring assembly comprising: the plate spring comprises a plate spring body, wherein the plate spring body is made of a composite material, and a first elastic body is arranged in the middle area of the plate spring body; the first frame plate and the first bottom plate, first frame plate is the U-shaped setting, first bottom plate with the opening both ends of first frame plate are fixed, just first bottom plate with form the assembly chamber between the first frame plate, first elastomer cover is located the assembly intracavity. The composite plate spring assembly replaces the original metal plate spring, and reduces the weight of the plate spring while guaranteeing the performance of the plate spring. The side of the first frame plate bears the vertical force generated by tightening the U-shaped bolt, the stress of the plate spring body is obviously improved, and the problem of the plate spring body breaking due to pressing can be avoided. The problem of deformation of the plate body does not exist in the torque requirement range of the U-shaped bolt, so that the problem of torque attenuation does not exist, and the torque of the U-shaped bolt does not need to be repeatedly screwed; the tightening torque of the U-shaped bolt can be obviously reduced, and the convenience of disassembly and assembly is improved.

Description

Composite material rear leaf spring assembly

Technical Field

The application relates to the field of automotive suspensions, in particular to a composite material rear leaf spring assembly.

Background

The leaf spring is the most widely used elastic element in the automotive suspension, and is an elastic beam with approximately equal strength formed by combining a plurality of alloy spring pieces with equal width but unequal lengths (the thicknesses can be equal or unequal), and the leaf spring: is formed by overlapping a plurality of steel plates with unequal lengths and unequal curvatures. After the installation, the two ends naturally bend upwards. When the impact force of the road surface to the wheels is transmitted, the steel plate deforms, so that the effects of buffering and vibration reduction are achieved, and the longitudinal arrangement also has the effect of guiding the impact force. Most of the non-independent suspension adopts leaf springs as elastic elements, so that a guide device and a damper can be omitted, and the structure is simple.

In the related art, the traditional rear leaf spring assembly is of a structure of at least two leaf springs or three leaf springs, is made of spring steel, has high density and heavy weight, cannot reduce the weight of the leaf springs while guaranteeing the performance of the leaf springs, and further cannot meet the light weight requirement of the whole automobile.

Disclosure of Invention

The application provides a composite material rear leaf spring assembly, which can improve the stress of a leaf spring body, reduce the tightening moment of a U-shaped bolt and simultaneously reduce the dead weight of the leaf spring, and solve the problems that the traditional rear leaf spring assembly can not ensure the performance of the leaf spring and simultaneously reduce the weight of the leaf spring, so that the light weight requirement of the whole automobile can not be met.

In a first aspect, embodiments of the present application provide a composite rear leaf spring assembly comprising:

The plate spring comprises a plate spring body, wherein the plate spring body is made of a composite material, and a first elastic body is arranged in the middle area of the plate spring body;

The first frame plate and the first bottom plate, first frame plate is the U-shaped setting, first bottom plate with the opening both ends of first frame plate are fixed, just first bottom plate with form the assembly chamber between the first frame plate, first elastomer cover is located the assembly intracavity.

With reference to the first aspect, in one implementation manner, a first positioning pin and two first positioning bosses are fixed on an inner top wall of the first frame plate, the first positioning pin is located between the two first positioning bosses, and the first positioning pin penetrates through the first frame plate.

With reference to the first aspect, in one embodiment, the composite rear leaf spring assembly further includes:

The first roof, the locating hole has been seted up to first roof, first roof is located the top of first deckle board, just first roof warp the locating hole cover is located the outer wall of first locating pin.

With reference to the first aspect, in one embodiment, the length of the first frame plate is greater than the length of the first top plate, and the length of the first top plate is greater than the clamping distance of the U-bolt.

With reference to the first aspect, in one embodiment, a second positioning pin and two second positioning bosses are fixed on an inner side wall of the first bottom plate, the second positioning pin is located between the two second positioning bosses, and the second positioning pin penetrates through to an outer side wall of the first bottom plate.

In combination with the first aspect, in an embodiment, edges of the inner side wall of the first frame plate and edges of the inner side wall of the first bottom plate are rounded.

With reference to the first aspect, in one implementation manner, the outer walls of two ends of the plate spring body are sleeved with second frame plates, and the bottoms of two ends of the plate spring body are provided with second bottom plates;

the composite material rear plate spring assembly further comprises a fixing bolt, and the fixing bolt sequentially penetrates through and fixes the second bottom plate, the plate spring body and the second frame plate.

In combination with the first aspect, in one embodiment, the opposite inner side walls of the second frame plate are each fixed with a second elastomer.

With reference to the first aspect, in one embodiment, a second top plate is disposed on top of the second frame plate, and a gasket is disposed between the second frame plate and the second top plate;

the height of the second frame plate is larger than one half of the thickness of one end of the plate spring body.

With reference to the first aspect, in one embodiment, the composite material comprises fibers and a resin.

The technical scheme provided by the embodiment of the application has the beneficial effects that:

The composite material plate spring assembly replaces the original metal plate spring, solves the problem that the prior plate spring assembly made of spring steel material cannot meet the light weight requirement of the whole vehicle, and reduces the weight of the plate spring while guaranteeing the performance of the plate spring. The side of the first frame plate bears the vertical force generated by tightening the U-shaped bolt, the stress of the plate spring body is obviously improved, and the problem of the plate spring body breaking due to pressing can be avoided. The first frame plate and the first bottom plate form a frame-shaped assembly cavity, and the problem of deformation of the plate body does not exist in the torque requirement range of the U-shaped bolts, so that the problem of torque attenuation does not exist, and the torque of the U-shaped bolts does not need to be repeatedly screwed; the tightening torque of the U-shaped bolt can be obviously reduced, and the convenience of disassembly and assembly is improved. The first elastic body fixedly connects the plate spring body with the frame-type assembly cavity to play a role in positioning; wear resistance and vibration reduction are achieved, and smoothness is improved; the stress of the plate spring is reduced, and the reliability is improved. The problem that the weight of the leaf spring cannot be reduced while the performance of the leaf spring is guaranteed by the traditional rear leaf spring assembly is solved, and the light weight requirement of the whole automobile cannot be met.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a first view of a composite rear leaf spring assembly;

FIG. 2 is a schematic perspective view of a second view of the composite rear leaf spring assembly;

FIG. 3 is a schematic exploded perspective view of FIG. 1;

FIG. 4 is a schematic perspective view of a first frame plate;

FIG. 5 is a schematic view of the internal cross-sectional structure of the first frame plate;

FIG. 6 is a schematic perspective view of a first base plate;

FIG. 7 is a schematic elevational view of the first base plate;

fig. 8 is a schematic perspective view of a second frame plate;

FIG. 9 is a schematic perspective view of a balanced suspension;

FIG. 10 is a schematic structural view of the middle of a balanced suspension;

FIG. 11 is a schematic structural view of one end of a balanced suspension;

fig. 12 is a schematic side view of fig. 11.

In the figure: 1. a leaf spring body; 2. a first elastomer; 3. a first frame plate; 301. a first positioning pin; 302. a first positioning boss; 4. a first base plate; 401. a second positioning pin; 402. a second positioning boss; 5. an assembly chamber; 6. a first top plate; 7. a second frame plate; 701. a second elastomer; 8. a second base plate; 9. a fixing bolt; 10. a second top plate; 11. a gasket; 12. a balance shaft bracket; 13. a cover plate; 14. u-shaped bolts; 15. a slide plate; 16. a guide seat.

Detailed Description

In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The embodiment of the application provides a composite material rear leaf spring assembly, which can improve the stress of a leaf spring body, reduce the tightening torque of a U-shaped bolt, reduce the dead weight of the leaf spring, and solve the problems that the traditional rear leaf spring assembly can not ensure the performance of the leaf spring and reduce the weight of the leaf spring, so that the light weight requirement of the whole automobile can not be met

As shown in fig. 1,2 and 3, in a first aspect, an embodiment of the present application provides a composite rear leaf spring assembly comprising: the plate spring comprises a plate spring body 1, wherein the plate spring body 1 is made of a composite material, and a first elastic body 2 is arranged in the middle area of the plate spring body 1; the first frame plate 3 and the first bottom plate 4, the first frame plate 3 is U-shaped setting, first bottom plate 4 with the opening both ends of first frame plate 3 are fixed, just first bottom plate 4 with form assembly chamber 5 between the first frame plate 3, first elastomer 2 cover is located in the assembly chamber 5.

As shown in fig. 2, the length direction of the plate spring body 1 extends in the left-right direction, and the outer wall of the middle area of the plate spring body 1 is sleeved with a first elastic body, the opening of the first frame plate 3 faces downwards and is sleeved on the outer wall of the first elastic body 2, and the first bottom plate 4 is located at the bottom of the first elastic body 2 and is fixed to two ends of the opening of the first frame plate 3, so that the first elastic body 2 is assembled in an assembly cavity 5 formed between the first bottom plate 4 and the first frame plate 3.

Specifically, the composite plate spring assembly replaces the original metal plate spring, solves the problem that the existing plate spring assembly made of spring steel material cannot meet the light weight requirement of the whole vehicle, and reduces the weight of the plate spring while guaranteeing the performance of the plate spring. The side face of the first frame plate 3 bears the vertical force generated by tightening the U-shaped bolt 14, the stress of the plate spring body 1 is obviously improved, and the problem of crushing of the plate spring body 1 can be avoided. The first frame plate 3 and the first bottom plate 4 form a frame-shaped assembly cavity 5, and the problem of plate body deformation does not exist in the torque requirement range of the U-shaped bolts 14, so that the problem of torque attenuation does not exist, and the torque of the U-shaped bolts 14 does not need to be repeatedly screwed; the tightening torque of the U-shaped bolt 14 can be remarkably reduced, and the convenience of disassembly and assembly is improved. The first elastic body 2 fixedly connects the plate spring body 1 with the frame-shaped assembly cavity 5 to play a role in positioning; wear resistance and vibration reduction are achieved, and smoothness is improved; the stress of the plate spring is reduced, and the reliability is improved. The problem that the weight of the leaf spring cannot be reduced while the performance of the leaf spring is guaranteed by the traditional rear leaf spring assembly is solved, and the light weight requirement of the whole automobile cannot be met.

In combination with the first aspect, in one embodiment, as shown in fig. 4 and 5, a first positioning pin 301 and two first positioning bosses 302 are fixed to an inner top wall of the first frame plate 3, the first positioning pin 301 is located between the two first positioning bosses 302, and the first positioning pin 301 penetrates the first frame plate 3. Wherein, first locating pin 301 and two first location bosss 302 can both play the restriction purpose of location to first elastomer 2, prevent when leaf spring body 1 atress deformation, lead to the problem that first elastomer 2 shifted. Meanwhile, the first positioning pin 301 can also play a role in positioning the cover plate 13 when the cover plate 13 is mounted later.

With reference to the first aspect, in one embodiment, as shown in fig. 1 and 3, the composite rear leaf spring assembly further includes: the first top plate 6, the first top plate 6 is provided with a positioning hole, the first top plate 6 is located at the top of the first frame plate 3, and the first top plate 6 is sleeved on the outer wall of the first positioning pin 301 through the positioning hole. The first top plate 6 is sleeved on the outer wall of the first positioning pin 301 through a positioning hole, and the first top plate 6 can play a certain role in protecting the first frame plate 3 below the first top plate 6 when the balance suspension is installed subsequently.

In combination with the first aspect, in one embodiment, as shown in fig. 1,3 and 10, the length of the first frame plate 3 is greater than the length of the first top plate 6, and the length of the first top plate 6 is greater than the clamping distance of the U-bolt. Through the length of first deckle board 3 being greater than the length of first roof 6, and the length of first roof 6 is greater than the clamping distance of U-shaped bolt 14, the middle part edge atress of leaf spring body 1 under the limit state can be reduced to first roof 6, promotes the reliability of leaf spring body 1.

In combination with the first aspect, in one embodiment, as shown in fig. 3 and 7, a second positioning pin 401 and two second positioning bosses 402 are fixed on an inner side wall of the first bottom plate 4, the second positioning pin 401 is located between the two second positioning bosses 402, and the second positioning pin 401 penetrates to an outer side wall of the first bottom plate 4. The second locating pin 401 and the two second locating bosses 402 can also play a locating role on the first elastic body 2, so that the problem that the first elastic body 2 is displaced when the plate spring body 1 is stressed and deformed is prevented.

In combination with the first aspect, in an embodiment, as shown in fig. 4, 6 and 7, edges of the inner side wall of the first frame plate 3 and edges of the inner side wall of the first bottom plate 4 are rounded. Wherein, the problem that the plate spring body 1 fails due to stress concentration caused by the contact of the plate spring body 1 with the edges of the first frame plate 3 and the first bottom plate 4 in the limit state can be avoided.

With reference to the first aspect, in one embodiment, as shown in fig. 1, 2, 3 and 9, the outer walls at two ends of the plate spring body 1 are sleeved with second frame plates 7, and the bottoms at two ends of the plate spring body 1 are provided with second bottom plates 8; the composite material rear plate spring assembly further comprises a fixing bolt 9, and the fixing bolt 9 sequentially penetrates through and fixes the second bottom plate 8, the plate spring body 1 and the second frame plate 7. The second frame plate 7 is in side contact limit with the guide seat 16 and is used for protecting the upper end part of the plate spring body 1 and avoiding the guide seat 16. The second bottom plate 8 contacts with the upper surface of the sliding plate 15, and is used for protecting the lower end part of the plate spring body 1 from being worn by the sliding plate 15.

Further, since the second bottom plate 8 slides on the slide plate 15 during the up-down jumping of the axle, the second bottom plate 8 may be made of NM400, 60Si2Mn, 65Mn or wear-resistant materials not lower than the performance, so as to ensure the hardness requirements of HRCs 40 to 47, to protect the lower end portion of the plate spring body 1, and to avoid excessive wear with the slide plate 15.

In combination with the first aspect, in one embodiment, as shown in fig. 8, the opposite inner side walls of the second frame plate 7 are each fixed with a second elastic body 701. The second elastic body 701 is adhered to the inner side of the second frame plate 7, and is used for relieving the lateral impact load generated on the leaf spring body 1 by the guide seat 16 under the jolt or turning working condition, so as to improve the reliability and smoothness of the leaf spring body 1 under severe working conditions such as bad roads or mountain areas.

With reference to the first aspect, in one embodiment, as shown in fig. 3 and 9, a second top plate 10 is disposed on top of the second frame plate 7, and a gasket 11 is disposed between the second frame plate 7 and the second top plate 10; the height of the second frame 7 is greater than half the thickness of one end of the leaf spring body 1. The second top plate 10 can improve the service life of the second frame plate 7, and contacts with the upper end of the guide seat 16 to limit in the axle jumping process, so as to protect the upper end of the plate spring body 1 and avoid abrasion with the guide seat 16. The height of the second frame plate 7 is greater than one half of the thickness of one end of the plate spring body 1, when the plate spring body 1 is stressed in a limiting way, the two ends of the plate spring body 1 can be allowed to deform laterally, the second frame plate 7 is protruded, and the problem that the second frame plate 7 is easy to deform and damage due to the fact that the second frame plate 7 is fully wrapped is avoided.

With reference to the first aspect, in one embodiment, the composite material comprises fibers and a resin. The plate spring body 1 is made of a composite material, and the material can be fiber reinforced and thermosetting resin, wherein the resin can be epoxy resin or PDCPD resin, the fiber can be one or more of E-glass fiber, aramid fiber or basalt fiber, and the plate spring body is designed according to an equal stress beam structure, the density can be 1.8-2.0 g/cm & lt 3 & gt, and the weight can be ensured to be far lower than that of the plate spring made of the spring steel material under the condition of the same structure.

In conclusion, the composite plate spring assembly is applied to a double rear axle vehicle type, the suspension system is a balanced suspension, the original metal plate spring is replaced, the bearing capacity, the buffering vibration reduction capacity, the rolling stability and the vehicle frame ground clearance height requirements of the whole vehicle rear suspension system are guaranteed, and meanwhile the dead weight of the plate spring is reduced. As shown in fig. 9 and 10, the middle part of the composite plate spring assembly is fixedly connected to the balance shaft bracket 12 through the cover plate 13 and the U-shaped bolt 14, and the end part is contacted with the sliding plate 15 on the bridge. The specific installation position of the composite plate spring assembly is shown in fig. 9, the schematic diagram of the composite plate spring assembly is shown in fig. 1 and 2, and the exploded view is shown in fig. 3.

Wherein, as shown in fig. 1,2 and 3, the first top plate 6 is in direct contact with the cover plate 13; the first frame plate 3 is a metal U-shaped plate, the first bottom plate 4 is a metal flat plate, and the first frame plate 3 and the first bottom plate 4 are fixed into an assembly cavity 5 with a frame structure through welding; the first elastomer 2 between the plate spring body 1 and the assembly cavity 5 is formed by injection molding, the material is a thermoplastic elastomer, preferably a nylon elastomer, and the plate spring body 1 is wrapped on four sides; as shown in fig. 4, 5, 6 and 7, the first frame plate 3 is welded with a first positioning boss 302 of a rectangular parallelepiped and the first bottom plate 4 is welded with a second positioning boss 402 of a rectangular parallelepiped; a first positioning pin 301 is welded in the middle of the first frame plate 3, and a second positioning pin 401 is welded in the middle of the first bottom plate 4; the inner side edge of the first frame plate 3 and the inner side edge of the first bottom plate 4 are required to be rounded to avoid the contact between the plate spring body 1 and the edges of the first frame plate 3 and the first bottom plate 4 in the limit state, and the stress concentration is generated to cause the failure of the plate spring body 1.

The side surface of the first frame plate 3 bears the vertical force generated by tightening the U-shaped bolt 14, so that the stress of the plate spring body 1 is obviously improved, and the problem of breakage of the plate spring body 1 can be avoided; referring to fig. 10, the first frame plate 3 and the first bottom plate 4 have the same length and are L4; l4 is slightly greater than the length L5 of the balance shaft bracket 12.

The first frame plate 3 and the first bottom plate 4 are in frame structures, and the problem of metal plate deformation does not exist in the torque requirement range of the U-shaped bolts 14, so that the problem of torque attenuation does not exist, and the torque of the U-shaped bolts 14 does not need to be repeatedly screwed; meanwhile, the tightening torque of the U-shaped bolt 14 can be reduced from original 860-1000 N.m to 500-600 N.m, so that the tightening torque can be obviously reduced, and the convenience in disassembly and assembly is improved.

Here, see fig. 10, the length L2 of the first top plate 6 requires: the length L1 of the cover plate 13 and the length L4 of the first frame plate 3 are larger than L2 and larger than the clamping distance L3 of the U-shaped bolt 14, so that the stress on the middle edge of the plate spring body 1 in the limit state can be reduced, and the reliability of the plate spring body 1 is improved. Wherein L2 is the maximum distance that the clamping distance of the U-bolt 14 is offset when the plate spring body 1 is subjected to extreme stress.

Wherein, the first elastomer 2 adopts injection moulding technology, and the material is thermoplastic elastomer, optional nylon elastomer, four sides parcel leaf spring body 1, function: the plate spring body 1 is fixedly connected with the frame-type structure to play a role in positioning; wear resistance and vibration reduction are achieved, and smoothness is improved; the stress of the plate spring is reduced, and the reliability is improved; before injection molding: the inner surfaces of the first frame plate 3 and the first bottom plate 4 and the outer surface of the middle part of the plate spring body 1 need to be precoated with an elastomer material in-mold adhesive, and an epoxy resin adhesive can be selected.

As shown in fig. 4, 5, 6 and 7, the inner side surface of the first frame plate 3 is welded with a first positioning boss 302 and the inner side surface of the first bottom plate 4 is welded with a second positioning boss 402, meanwhile, the first positioning pin 301 also extends out of the outer side surface of the first frame plate 3, and the second positioning pin 401 extends out of the outer side surface of the first bottom plate 4; the first positioning boss 302 and the first positioning pin 301 have the same height and are L6; the second positioning boss 402 and the second positioning pin 401 have the same height and are L7; l6=l7=half the thickness of the first elastic body 2; adopt boss structure and locating pin to stretch out the structure and can increase and adhere to the area with first elastomer 2, promote bonding reliability, boss structure and qualitative round pin can fix a position the first elastomer 2 after the solidification shaping simultaneously, avoid the condition that the plate spring body 1 shifted appears in the adhesive inefficacy between the frame structure that first elastomer 2 and first frame plate 3 and first bottom plate 4 formed.

As shown in fig. 3 and 9, the second top plate 10 may be a metal flat plate, and contacts with the upper end of the guide seat 16 to limit in the process of vehicle axle jumping, so as to protect the upper surface of the end of the plate spring body 1 and avoid abrasion with the guide seat 16. The second frame plate 7 can be a metal U-shaped plate and is in contact limit with the side surface of the guide seat 16, and is used for protecting the side surface of the end part of the plate spring body 1 and avoiding abrasion with the guide seat 16; as shown in fig. 8, the second elastic body 701, which is formed by vulcanizing and adhering a rubber material, is used for alleviating the side impact load generated on the leaf spring body 1 by the guide seat 16 under jolt or turning conditions, so as to improve the reliability and smoothness of the leaf spring body 1 under severe conditions such as bad roads or mountainous areas.

The second bottom plate 8 may be a metal flat plate, and contacts with the upper surface of the sliding plate 15, so as to protect the lower surface of the end part of the plate spring body 1 from being worn by the sliding plate 15; because the second bottom plate 8 can slide on the sliding plate 15 in the up-and-down jumping process of the axle, the second bottom plate 8 needs to adopt NM400, 60Si2Mn and 65Mn or wear-resistant materials with the performance not lower than the NM400, 60Si2Mn and 65Mn, so that the hardness requirements of HRC 40-47 are ensured, the lower surface of the end part of the body is protected, and the abrasion with the sliding plate 15 is avoided.

As shown in fig. 3, a gasket 11 made of rubber or nylon material can be assembled between the second top plate 10 and the second frame plate 7, and is used for adjusting the thickness of the end part so as to adapt to the height requirements of different guide seats 16; meanwhile, the pad 11 is adopted to alleviate the impact load generated by the contact between the second top plate 10 and the guide seat 16 in the limit state, so that the reliability and smoothness of the plate spring body 1 in a bad road working condition are improved.

As shown in fig. 3, the second bottom plate 8, the second frame plate 7, the gasket 11, and the second top plate 10 are fixed to the end of the leaf spring body 1 by fastening bolts 9 and nuts, and the gasket 11 is bonded between the second frame plate 7 and the second top plate 10 by an adhesive.

As shown in fig. 11, the lengths of the second top plate 10, the second frame plate 7 and the gasket 11 are the same, and are all L12, so that the second top plate 10 and the guide seat 16 can be contacted in a limit state during design; the length of the second bottom plate 8 is L13, and the second bottom plate 8 and the sliding plate 15 can be contacted under the limit state during design; because the size of the guide seat 16 is smaller than that of the sliding plate 15, L12 is smaller than L13; the side surface height L14 of the second frame plate 7 is more than or equal to half of the end thickness L15 of the plate spring body 1.

As shown in fig. 12, the width of the second frame plate 7 is L11, the width of the plate spring body 1 is L9, the width of the second bottom plate 8 is L10, and the widths of the second top plate 10 and the gasket 11 are L8; the design needs to ensure that: l11 > l8=l10 > L9, where L11 is the same width as the original metallic leaf spring.

In a second aspect, an embodiment of the present application provides a vehicle, including: the plate spring comprises a plate spring body 1, wherein the plate spring body 1 is made of a composite material, and a first elastic body 2 is arranged in the middle area of the plate spring body 1; the first frame plate 3 and the first bottom plate 4, the first frame plate 3 is U-shaped setting, first bottom plate 4 with the opening both ends of first frame plate 3 are fixed, just first bottom plate 4 with form assembly chamber 5 between the first frame plate 3, first elastomer 2 cover is located in the assembly chamber 5.

As shown in fig. 2, the length direction of the plate spring body 1 extends in the left-right direction, and the outer wall of the middle area of the plate spring body 1 is sleeved with a first elastic body, the opening of the first frame plate 3 faces downwards and is sleeved on the outer wall of the first elastic body 2, and the first bottom plate 4 is located at the bottom of the first elastic body 2 and is fixed to two ends of the opening of the first frame plate 3, so that the first elastic body 2 is assembled in an assembly cavity 5 formed between the first bottom plate 4 and the first frame plate 3.

Specifically, the composite plate spring assembly replaces the original metal plate spring, solves the problem that the existing plate spring assembly made of spring steel material cannot meet the light weight requirement of the whole vehicle, and reduces the weight of the plate spring while guaranteeing the performance of the plate spring. The side face of the first frame plate 3 bears the vertical force generated by tightening the U-shaped bolt 14, the stress of the plate spring body 1 is obviously improved, and the problem of crushing of the plate spring body 1 can be avoided. The first frame plate 3 and the first bottom plate 4 form a frame-shaped assembly cavity 5, and the problem of plate body deformation does not exist in the torque requirement range of the U-shaped bolts 14, so that the problem of torque attenuation does not exist, and the torque of the U-shaped bolts 14 does not need to be repeatedly screwed; the tightening torque of the U-shaped bolt 14 can be remarkably reduced, and the convenience of disassembly and assembly is improved. The first elastic body 2 fixedly connects the plate spring body 1 with the frame-shaped assembly cavity 5 to play a role in positioning; wear resistance and vibration reduction are achieved, and smoothness is improved; the stress of the plate spring is reduced, and the reliability is improved. The problem that the weight of the leaf spring cannot be reduced while the performance of the leaf spring is guaranteed by the traditional rear leaf spring assembly is solved, and the light weight requirement of the whole automobile cannot be met.

Further, as shown in fig. 4 and 5, a first positioning pin 301 and two first positioning bosses 302 are fixed on the inner top wall of the first frame plate 3, the first positioning pin 301 is located between the two first positioning bosses 302, and the first positioning pin 301 penetrates through the first frame plate 3. Wherein, first locating pin 301 and two first location bosss 302 can both play the restriction purpose of location to first elastomer 2, prevent when leaf spring body 1 atress deformation, lead to the problem that first elastomer 2 shifted. Meanwhile, the first positioning pin 301 can also play a role in positioning the cover plate 13 when the cover plate 13 is mounted later.

Further, as shown in fig. 1 and 3, the composite rear leaf spring assembly further includes: the first top plate 6, the first top plate 6 is provided with a positioning hole, the first top plate 6 is located at the top of the first frame plate 3, and the first top plate 6 is sleeved on the outer wall of the first positioning pin 301 through the positioning hole. The first top plate 6 is sleeved on the outer wall of the first positioning pin 301 through a positioning hole, and the first top plate 6 can play a certain role in protecting the first frame plate 3 below the first top plate 6 when the balance suspension is installed subsequently.

Further, as shown in fig. 1, 3 and 10, the length of the first frame plate 3 is greater than the length of the first top plate 6, and the length of the first top plate 6 is greater than the clamping distance of the U-shaped bolt. Through the length of first deckle board 3 being greater than the length of first roof 6, and the length of first roof 6 is greater than the clamping distance of U-shaped bolt 14, the middle part edge atress of leaf spring body 1 under the limit state can be reduced to first roof 6, promotes the reliability of leaf spring body 1.

Further, as shown in fig. 3 and 7, a second positioning pin 401 and two second positioning bosses 402 are fixed on the inner side wall of the first bottom plate 4, the second positioning pin 401 is located between the two second positioning bosses 402, and the second positioning pin 401 penetrates to the outer side wall of the first bottom plate 4. The second locating pin 401 and the two second locating bosses 402 can also play a locating role on the first elastic body 2, so that the problem that the first elastic body 2 is displaced when the plate spring body 1 is stressed and deformed is prevented.

Further, as shown in fig. 4, 6 and 7, the edge of the inner sidewall of the first frame plate 3 and the edge of the inner sidewall of the first bottom plate 4 are rounded. Wherein, the problem that the plate spring body 1 fails due to stress concentration caused by the contact of the plate spring body 1 with the edges of the first frame plate 3 and the first bottom plate 4 in the limit state can be avoided.

Further, as shown in fig. 1,2, 3 and 9, the outer walls of the two ends of the plate spring body 1 are sleeved with second frame plates 7, and the bottoms of the two ends of the plate spring body 1 are respectively provided with a second bottom plate 8; the composite material rear plate spring assembly further comprises a fixing bolt 9, and the fixing bolt 9 sequentially penetrates through and fixes the second bottom plate 8, the plate spring body 1 and the second frame plate 7. The second frame plate 7 is in side contact limit with the guide seat 16 and is used for protecting the upper end part of the plate spring body 1 and avoiding the guide seat 16. The second bottom plate 8 contacts with the upper surface of the sliding plate 15, and is used for protecting the lower end part of the plate spring body 1 from being worn by the sliding plate 15.

In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that in the present application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A composite rear leaf spring assembly, comprising:

the plate spring comprises a plate spring body (1), wherein the plate spring body (1) is made of a composite material, and a first elastic body (2) is arranged in the middle area of the plate spring body (1);

First deckle board (3) and first bottom plate (4), first deckle board (3) are the U-shaped setting, first bottom plate (4) with the opening both ends of first deckle board (3) are fixed, just first bottom plate (4) with form assembly chamber (5) between first deckle board (3), first elastomer (2) cover is located in assembly chamber (5).

2. The composite rear leaf spring assembly of claim 1 wherein,

The inner top wall of the first frame plate (3) is fixed with a first positioning pin (301) and two first positioning bosses (302), the first positioning pin (301) is located between the two first positioning bosses (302), and the first positioning pin (301) penetrates through the first frame plate (3).

3. The composite rear leaf spring assembly of claim 2 wherein,

The composite rear leaf spring assembly further includes:

the first top plate (6), the locating hole has been seted up to first top plate (6), first top plate (6) are located the top of first framed board (3), just first top plate (6) are through the locating hole cover is located the outer wall of first locating pin (301).

4. The composite rear leaf spring assembly of claim 3 wherein,

The length of the first frame plate (3) is larger than that of the first top plate (6), and the length of the first top plate (6) is larger than the clamping distance of the U-shaped bolt.

5. The composite rear leaf spring assembly of claim 1 wherein,

The inner side wall of the first bottom plate (4) is fixed with a second locating pin (401) and two second locating bosses (402), the second locating pin (401) is located between the two second locating bosses (402), and the second locating pin (401) penetrates through to the outer side wall of the first bottom plate (4).

6. The composite rear leaf spring assembly of claim 1 wherein,

The edges of the inner side walls of the first frame plates (3) and the edges of the inner side walls of the first bottom plates (4) are rounded.

7. The composite rear leaf spring assembly of claim 1 wherein,

The outer walls of the two ends of the plate spring body (1) are sleeved with second frame plates (7), and the bottoms of the two ends of the plate spring body (1) are provided with second bottom plates (8);

The composite material rear plate spring assembly further comprises a fixing bolt (9), and the fixing bolt (9) sequentially penetrates through and fixes the second bottom plate (8), the plate spring body (1) and the second frame plate (7).

8. The composite rear leaf spring assembly of claim 7,

The opposite inner side walls of the second frame plate (7) are respectively fixed with a second elastic body (701).

9. The composite rear leaf spring assembly of claim 7,

A second top plate (10) is arranged at the top of the second frame plate (7), and a gasket (11) is arranged between the second frame plate (7) and the second top plate (10);

The height of the second frame plate (7) is larger than one half of the thickness of one end of the plate spring body (1).

10. The composite rear leaf spring assembly of claim 1 wherein,

The composite material includes fibers and a resin.