CN220947408U - Leaf spring suspension system and vehicle - Google Patents

Abstract

The present disclosure relates to a leaf spring suspension system and a vehicle, the leaf spring suspension system comprising a leaf spring provided with a rolling lug in which a first bushing is mounted; the plate spring bracket comprises a mounting seat and a connecting piece, a shaft sleeve is arranged on the connecting piece, and a second bushing is arranged in the shaft sleeve; the lifting lug bracket comprises a first lifting lug plate and a second lifting lug plate which are oppositely arranged; a first threaded fastener passing through the first shackle plate, the first bushing, and the second shackle plate in sequence to connect the leaf spring and shackle bracket together; and the second threaded fastener sequentially penetrates through the first lifting lug plate, the second bush and the second lifting lug plate to connect the plate spring bracket and the lifting lug bracket together, wherein the first bush and the second bush respectively comprise an inner bush and an outer bush which are made of metal materials and an elastic vibration isolation layer which is fixed between the inner bush and the outer bush. The leaf spring suspension system can effectively solve the problem that the leaf spring pin in the prior art needs to be maintained and lubricated regularly.

Description

Leaf spring suspension system and vehicle

Technical Field

The present disclosure relates to the field of vehicle technology, and in particular, to a leaf spring suspension system and a vehicle.

Background

The leaf spring is the most widely used elastic element in automotive suspension, and is an elastic beam with approximately equal strength formed by combining a plurality of alloy spring pieces with equal widths and unequal lengths. In the leaf spring suspension system, the leaf spring is connected with the frame through a lifting lug support and a leaf spring support so as to realize the force transmission function between the ground and the vehicle body, and the coil lug of the leaf spring is connected with the lifting lug support and the leaf spring support through leaf spring pins. The spring support is provided with a spring pin, and the spring pin is provided with a spring pin, wherein the spring pin and the spring support are provided with metal bushings through which the spring pin passes, but because the spring support and the metal bushings are of non-clamping structures, the metal bushings can axially move in the moving process, and rigid impact abnormal sound is easy to occur. In addition, in the process of rotating the metal bush around the pin shaft, friction exists on contact surfaces between the plate spring support and the metal bush and between the lifting lug support and the metal bush, so that friction noise is easy to occur. In addition, the leaf spring round pin needs to install the grease mouth in order to be used for filling lubricating grease, needs periodic maintenance, and is frequent, and lubrication effect is poor, with high costs.

Disclosure of utility model

It is an object of the present disclosure to provide a leaf spring suspension system to at least partially solve the above technical problems.

In order to achieve the above object, the present disclosure provides a leaf spring suspension system including: the plate spring is provided with a rolling lug, and a first bushing is arranged in the rolling lug; the plate spring bracket comprises a mounting seat and a connecting piece, wherein a shaft sleeve is arranged on the connecting piece, and a second bushing is arranged in the shaft sleeve; the lifting lug bracket comprises a first lifting lug plate and a second lifting lug plate which are oppositely arranged; a first threaded fastener passing through the first shackle plate, the first bushing, and the second shackle plate in sequence to connect the leaf spring and the shackle bracket together; and a second threaded fastener passing through the first shackle plate, the second bushing and the second shackle plate in order to connect the leaf spring bracket and the shackle bracket together, wherein the first bushing and the second bushing each include an inner bushing and an outer bushing made of a metal material and an elastic vibration isolation layer fixed between the inner bushing and the outer bushing.

Optionally, two ends of the inner bushing in the axial direction respectively extend out from corresponding ends of the outer bushing, one end of the inner bushing is abutted against the inner wall surface of the first lifting lug plate, and the other end of the inner bushing is abutted against the inner wall surface of the second lifting lug plate.

Optionally, the first bushing is installed in the rolling lug in an interference fit manner, two ends of the outer bushing of the first bushing in the axial direction are respectively flush with corresponding ends of the rolling lug, and/or the second bushing is installed in the shaft sleeve in an interference fit manner, and two ends of the outer bushing of the second bushing in the axial direction are respectively flush with corresponding ends of the shaft sleeve.

Optionally, the first lifting lug plate and the second lifting lug plate are both provided with a first threaded hole for the first threaded fastener to pass through and a second threaded hole for the second threaded fastener to pass through.

Alternatively, the elastic vibration isolation layer is configured as a rubber layer that is vulcanization-formed between the inner liner and the outer liner.

Optionally, the connecting piece includes the U-shaped board, the U-shaped board install in first lug board with between the second lug board, the U-shaped board includes first dull and stereotyped portion and two second dull and stereotyped portions of relative setting, first dull and stereotyped portion with the mount pad is connected, just first dull and stereotyped portion sets up two between the second dull and stereotyped portion for connect two second dull and stereotyped portion, two all be provided with the mounting hole on the second dull and stereotyped portion, two the mounting hole sets up relatively, wherein, the axle sleeve is fixed respectively in the mounting hole that corresponds at axial both ends.

Optionally, both ends of the sleeve in the axial direction protrude at least to be flush with an outer end of the second flat plate portion.

Optionally, the first threaded fastener and/or the second threaded fastener are configured as a bolt, the bolt comprises a head and a rod, one end of the rod is connected with the head, the other end sequentially passes through the first lifting lug plate, the corresponding bushing and the second lifting lug plate, and one end of the rod, which is far away from the head, is fixed on the outer side of the second lifting lug plate through a nut, wherein the nut is configured as a self-locking nut.

Optionally, the first shackle board is configured as a stamping; and/or the second shackle plate is configured as a stamping; and/or the mounting base is configured as a stamping; and/or the connecting piece is constructed as a stamping.

On the basis of the scheme, the invention further provides a vehicle, and the vehicle is provided with the plate spring suspension system.

Through above-mentioned technical scheme, in the leaf spring suspension system that this disclosure provided, first bush is installed in the reel of leaf spring, and first screw thread fastener passes first lug board, first bush and second lug board in proper order and can be used for being in the same place leaf spring and lug support connection, and likewise, the second bush is installed in the axle sleeve of connecting piece, and second screw thread fastener passes first lug board, second bush and second lug board in proper order can be used for being in the same place lug support and leaf spring support connection. Wherein, first bush and second bush all include inner liner, outer liner and set up the inner liner with rubber layer (simply referred to as composite bushing structure) between the outer liner, compare in prior art's metal bush, this composite bushing structure's setting can guarantee that all do not produce between first bush and the first screw thread fastener, between second bush and the second screw thread fastener and between lug support and the two fasteners and deflect, but take place elastic deformation and deflect the motion through the rubber layer in the corresponding bush, thereby can absorb the vibration in the leaf spring rotary motion process, be favorable to increasing the cushioning effect and the life of leaf spring, and then be favorable to improving the travelling comfort and the driving safety of vehicle. In addition, it should be understood that the connection between the first bushing and the first threaded fastener is threaded, and the connection between the second bushing and the second threaded fastener is threaded, so that the connection between the first bushing and the first threaded fastener and the connection between the second bushing and the second threaded fastener do not need to be additionally provided with lubricating oil, and maintenance-free connection of the first threaded fastener and the second fastener can be realized, thereby being beneficial to cost reduction.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

FIG. 1 is a schematic perspective view of a leaf spring suspension system provided in accordance with an embodiment of the present disclosure;

FIG. 2 is an exploded view of a leaf spring suspension system provided in accordance with an embodiment of the present disclosure;

FIG. 3 is a schematic view of a leaf spring bracket in a leaf spring suspension system provided in accordance with an embodiment of the present disclosure, wherein the second bushing and bushing are in a condition to be installed;

FIG. 4 is a bottom view of a leaf spring bracket in a leaf spring suspension system provided in accordance with an embodiment of the present disclosure;

FIG. 5 is a schematic perspective view of a lug in a leaf spring suspension system provided in accordance with an embodiment of the present disclosure, wherein a first bushing is in a condition to be installed;

Fig. 6 is a schematic structural view of a first bushing in a leaf spring suspension system provided in accordance with an embodiment of the present disclosure.

Description of the reference numerals

1-Leaf springs; 11-ear winding;

2-leaf spring support; 21-a mounting base; 211-connecting holes; 22-connecting piece; 221-U-shaped plate; 2211—a first plate portion; 2212-a second plate portion; 2213—mounting holes; 2214-reinforcing bars; 2215-through hole; 23-shaft sleeve;

3-lifting lug brackets; 31-a first shackle plate; 32-a second shackle plate; 33-a first threaded fastener; 331-head; 332-a stem; 34-a second threaded fastener; 35-a nut;

41-a first bushing; 42-a second bushing; 43-an inner liner; 44-an outer liner; 45-elastic vibration isolation layer.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In this disclosure, unless otherwise indicated, terms of orientation such as "inner" and "outer" are used to refer to the inner and outer sides of the respective component parts' own contours. The terms "first" and "second" are used herein to distinguish one element from another without sequence or importance. Moreover, the following description, when referring to the drawings, wherein like reference numerals designate identical or similar elements throughout the several views, the present disclosure is not repeated.

According to a specific embodiment of the present disclosure, there is provided a leaf spring suspension system, an example of which is shown in fig. 1 to 6, wherein, referring to fig. 1 to 5, the leaf spring suspension system includes: the leaf spring 1, the leaf spring 1 is provided with a rolling lug 11, and a first bushing 41 is arranged in the rolling lug 11; the plate spring bracket 2 comprises a mounting seat 21 and a connecting piece 22, wherein a shaft sleeve 23 is arranged on the connecting piece 22, and a second bushing 42 is arranged in the shaft sleeve 23; a shackle bracket 3 including a first shackle plate 31 and a second shackle plate 32 disposed opposite to each other; a first screw fastener 33, the first screw fastener 33 passing through the first shackle plate 31, the first bushing 41, and the second shackle plate 32 in order to connect the leaf spring 1 and the shackle bracket 3 together; and a second threaded fastener 34 passing through the first shackle plate 31, the second bushing 42, and the second shackle plate 32 in order to connect the leaf spring bracket 2 and the shackle bracket 3 together, wherein the first bushing 41 and the second bushing 42 each include an inner bushing 43 and an outer bushing 44 made of a metallic material, and an elastic vibration insulating layer 45 fixed between the inner bushing 43 and the outer bushing 44.

Through the above technical solution, in the leaf spring suspension system provided by the present disclosure, the first bushing 41 is installed in the coil lug 11 of the leaf spring 1, the first threaded fastener 33 sequentially passes through the first shackle plate 31, the first bushing 41 and the second shackle plate 32 to be used for connecting the leaf spring 1 and the shackle bracket 3 together, and likewise, the second bushing 42 is installed in the shaft sleeve 23 of the connecting member 22, and the second threaded fastener 34 sequentially passes through the first shackle plate 31, the second bushing 42 and the second shackle plate 32 to be used for connecting the shackle bracket 3 and the leaf spring bracket 2 together. The first bushing 41 and the second bushing 42 each include an inner bushing 43 and an outer bushing 44 made of a metal material, and an elastic vibration isolation layer 45 (hereinafter simply referred to as a composite bushing structure) fixed between the inner bushing 43 and the outer bushing 44, and compared with the metal bushing in the prior art, the arrangement of the composite bushing structure can ensure that no deflection occurs between the first bushing 41 and the first threaded fastener 33, between the second bushing 42 and the second threaded fastener 34, and between the lifting lug bracket 3 and the two threaded fasteners, but the deflection motion is performed through the elastic deformation of the elastic vibration isolation layer 45 in the corresponding bushing, so that the vibration in the rotation motion process of the plate spring 1 can be absorbed, the vibration isolation effect is achieved, the buffering effect and the service life of the plate spring 1 are improved, and the riding comfort and the driving safety of the vehicle are improved. In addition, it should be appreciated that the connection between the first bushing 41 and the first threaded fastener 33 is a threaded connection, and the connection between the second bushing 42 and the second threaded fastener 34 is a threaded connection, so that the connection between the first bushing 41 and the first threaded fastener 33 and the connection between the second bushing 42 and the second threaded fastener 34 do not need to be additionally provided with lubricating oil, thereby realizing maintenance-free connection of the first threaded fastener 33 and the second threaded fastener 34 and being beneficial to cost reduction.

It should be noted that the elastic vibration isolation layer 45 may be configured in any suitable manner, alternatively, the elastic vibration isolation layer 45 may be configured as a rubber layer that may be formed between the inner liner 43 and the outer liner 44 by 360 ° circumferential vulcanization to ensure the connection between the inner liner 43 and the outer liner 44 and the vibration absorbing/isolating effect, and in other embodiments of the present disclosure, the elastic vibration isolation layer may be configured in other manners, which are not limiting in any way.

In the specific embodiment provided in the disclosure, referring to fig. 6, two ends of the inner bushing 43 in the axial direction extend from corresponding ends of the outer bushing 44, and one end of the inner bushing 43 is abutted against an inner wall surface of the first shackle plate 31 (an end surface of the first shackle plate 31 near one end of the second shackle plate 32 is understood), and the other end is abutted against a distance between inner wall surfaces of the second shackle plate 32 (an end surface of the second shackle plate 32 near one end of the first shackle plate 31), so that the first shackle plate and the second shackle plate clamp the inner bushing 43, on one hand, can transfer a force transferred by the leaf spring to the elastic vibration isolation layer 45, and perform a deflection motion through elastic deformation of the elastic vibration isolation layer 45, so as to absorb vibration in a rotation motion process of the leaf spring 1, to play a vibration isolation effect, and on the other hand, avoid that two ends of the outer bushing 44 are directly abutted against corresponding shackle plates, and further avoid occurrence of abnormal friction sound caused between the leaf spring bracket 2 and the shackle bracket 3 and the leaf spring bracket 1 in the axial motion process.

In the embodiment provided in the present disclosure, referring to fig. 2 and 5, the first bush 41 is installed in the ear 11 with an interference fit, and both ends of the outer bush 44 of the first bush 41 in the axial direction are flush with the corresponding ends of the ear 11, respectively. The first bushing 41 is installed in the winding lug 11 in an interference fit manner, so that on one hand, relative rotation between the first bushing 41 and the winding lug 11 can be prevented, and friction noise between the first bushing 41 and the winding lug 11 can be avoided; on the other hand, the occurrence of axial movement and radial movement of the first bush 41 in the lugs 11 can be avoided, so that the occurrence of rigid impact abnormal sound caused by the axial movement and radial movement of the first bush 41 can be avoided. The two ends of the outer bushing 44 of the first bushing 41 in the axial direction are respectively flush with the corresponding ends of the rolling lugs 11, so that the two ends of the rolling lugs 11 do not need to be abutted against the corresponding lifting lug plates, and the occurrence of abnormal friction noise caused by the axial movement between the plate spring 1 and the lifting lug support 3 can be further avoided.

In the particular embodiment provided by the present disclosure, as shown with reference to fig. 2 and 3, the second bushing 42 is mounted within the sleeve 23 with an interference fit, and the outer bushing 44 of the second bushing 42 is flush with the corresponding end of the sleeve 23 at each end in the axial direction. The second bushing 42 is installed in the shaft sleeve 23 in an interference fit manner, so that on one hand, relative rotation between the second bushing 42 and the shaft sleeve 23 can be prevented, and friction noise between the second bushing 42 and the shaft sleeve 23 can be avoided; on the other hand, the occurrence of axial movement and radial movement of the second bush 42 in the boss 23 can be avoided, so that the occurrence of rigid impact abnormal sound caused by the axial movement and radial movement of the second bush 42 can be avoided. And the two ends of the outer bushing 44 of the second bushing 42 in the axial direction are respectively flush with the corresponding ends of the shaft sleeve 23, so that the two ends of the shaft sleeve 23 do not need to be abutted against corresponding lifting lug plates, and further the occurrence of abnormal friction noise caused by the axial movement process between the plate spring bracket 2 and the lifting lug bracket 3 is avoided.

In the embodiment provided in the present disclosure, a first threaded hole (not shown) through which the first threaded fastener 33 passes and a second threaded hole (not shown) through which the second threaded fastener 34 passes are provided on each of the first and second shackle plates 31 and 32. The arrangement of the first threaded hole can avoid the occurrence of axial movement and radial movement between the first threaded fastener 33 and the first lifting lug plate 31 and the second lifting lug plate 32, so as to avoid the occurrence of abnormal rigidity sound caused by the axial movement and the radial movement of the first threaded fastener 33. The arrangement of the second threaded holes can avoid the occurrence of axial movement and radial movement between the second threaded fastener 34 and the first lifting lug plate 31 and the second lifting lug plate 32, so as to avoid the occurrence of abnormal rigidity sound caused by the axial movement and the radial movement of the first threaded fastener 33.

In the particular embodiment provided by the present disclosure, the first shackle plate 31, the second shackle plate 32, the mount 21, and the connector 22, respectively, may be configured in any suitable manner, alternatively, the first shackle plate 31 is configured as a stamping; and/or the second shackle plate 32 is configured as a stamping; and/or the mounting 21 is configured as a stamping; and/or the connector 22 is configured as a stamping. The first shackle plate 31, the second shackle plate 32, the mount 21, and the connecting member 22, respectively, may be made of any suitable material, and the present disclosure is not limited in this regard. Compared with the casting piece in the prior art, the stamping part has the advantages of simpler structure, lighter weight (being beneficial to light-weight design), high reliability, no need of putting into a die, low development cost and wide application range, and can be suitable for a suspension system of a small-tonnage and small-batch automobile. In one embodiment of the present disclosure, the first shackle plate 31, the second shackle plate 32, the mount 21, and the connecting member 22 are each configured as a stamping, which may further reduce the weight and development costs of the shackle bracket 3 and the leaf spring bracket 2, with higher reliability.

As shown in fig. 1 to 4, the connecting member 22 may further include a U-shaped plate 221, the U-shaped plate 221 including a first flat plate portion 2211 and two second flat plate portions 2212 disposed opposite to each other, the first flat plate portion 2211 being connected to the mount 21, and the first flat plate portion 2211 being disposed between the two second flat plate portions 2212 for connecting the two second flat plate portions 2212, the two second flat plate portions 2212 being provided with mounting holes 2213, the two mounting holes 2213 being coaxially disposed, wherein both ends of the boss 23 in the axial direction are fixed in the corresponding mounting holes 2213, respectively. Here, the U-shaped plate 221 may be constructed as an integral structure, i.e., the first flat plate portion 2211 and the two second flat plate portions 2212 are integrally constructed (the entire U-shaped plate 221 is formed by stamping), or may be constructed as a connection structure, i.e., the first flat plate portion 2211 connects the two first flat plate portions 2211 by welding or other connection means (the first flat plate portion 2211 and the second flat plate portion 2212 are connected by welding after stamping), which is not limited in any way by the present disclosure. In addition, the fixed connection between the sleeve 23 and the mounting hole 2213 may be connected by welding, or other connection methods, which is not limited in this disclosure.

In particular embodiments of the present disclosure, the mount 21 may be constructed in any suitable manner. Alternatively, referring to fig. 1 to 4, the mount 21 may be constructed in a plate-like structure provided with a connection hole 211 for connection with the vehicle frame. In addition, the connection between the mounting seat 21 and the first flat plate portion 2211 may be connected by welding, or may be other connection manners, in order to ensure connection reliability between the mounting seat 21 and the connecting member 22, the reinforcing ribs 2214 are disposed between the first flat plate portion 2211 and the mounting seat 21 at intervals, and the reinforcing ribs 2214 are respectively welded with the first flat plate portion 2211 and the mounting seat 21, and the number and the arrangement manners of the reinforcing ribs 2214 may be selectively designed according to actual needs. In addition, in order to further reduce the weight of the leaf spring support 2, the first flat plate portion 2211 of the U-shaped plate 221 may be provided with a plurality of through holes 2215, and the arrangement of the plurality of through holes 2215 may reduce the weight of the leaf spring support 2 on the one hand and may serve as plug welding holes for welding when the first flat plate portion 2211 and the mount 21 are welded on the other hand. In other embodiments of the present disclosure, the mounting base 21 may be configured in other manners, and the present disclosure is not limited in any way. It should be noted that, in order to avoid collision interference with the stiffener 2214 during the rotation of the lifting lug bracket 3, a sufficient movement space is reserved between the stiffener 2214 and the lifting lug bracket 3.

In the particular embodiment provided in the present disclosure, the first and second threaded fasteners 33 and 34, respectively, may be configured in any suitable manner, alternatively, referring to fig. 1, the first and/or second threaded fasteners 33 and 34 are configured as bolts comprising a head 331 and a shank 332, one end of the shank 332 is connected to the head 331, the other end passes through the first and corresponding bushings and the second shackle plates 31 and 32 in sequence, and an end of the shank 332 remote from the head 331 is secured to the outside of the second shackle plate 32 by a nut 35, wherein the nut 35 is configured as a self-locking nut 35. Referring to fig. 1, the shank 332 of the first threaded fastener 33 sequentially passes through the first shackle plate 31, the first bushing 41, and the second shackle plate 32, and the head 331 of the first threaded fastener 33 abuts against the first shackle plate 31, one end of the shank 332 of the first threaded fastener 33 remote from the head 331 thereof is fixed to the outside of the second shackle plate 32 by a nut 35, and the first bushing 41 in the eye 11 can be compressed between the first shackle plate 31 and the second shackle plate 32 by the connection between the nut 35 and the first threaded fastener 33. Likewise, the head 331 of the second threaded fastener 34 abuts against the first shackle plate 31, the end of the shank 332 of the second threaded fastener 34 remote from the head 331 thereof is fixed to the outer side of the second shackle plate 32 by means of a further nut 35, and the second bushing 42 in the leaf spring bracket 2 can be compressed between the first shackle plate 31 and the second shackle plate 32 by means of the connection between the nut 35 and the first threaded fastener 33. In order to improve the connection reliability between the bolt and the nut 35, the bolt may adopt a high-strength bolt, the nut 35 is configured as a self-locking nut 35, wherein the nut 35 is configured as a self-locking nut 35 to prevent the screw thread between the bolt and the nut 35 from loosening, so as to improve the capability of resisting transverse vibration at the connection position of the bolt and the nut 35. In other embodiments of the present disclosure, the first threaded fastener 33 and the second threaded fastener 34 may be configured in other ways, and the present disclosure is not limited in any way.

On the basis of the scheme, the invention further provides a vehicle, and the vehicle is provided with the plate spring suspension system.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the embodiments described above, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims (10)

1. A leaf spring suspension system, the leaf spring suspension system comprising:

the plate spring is provided with a rolling lug, and a first bushing is arranged in the rolling lug;

The plate spring bracket comprises a mounting seat and a connecting piece, wherein a shaft sleeve is arranged on the connecting piece, and a second bushing is arranged in the shaft sleeve;

The lifting lug bracket comprises a first lifting lug plate and a second lifting lug plate which are oppositely arranged;

a first threaded fastener passing through the first shackle plate, the first bushing, and the second shackle plate in sequence to connect the leaf spring and the shackle bracket together; and

A second threaded fastener passing through the first shackle plate, the second bushing, and the second shackle plate in order to connect the leaf spring bracket and the shackle bracket together,

Wherein the first bushing and the second bushing each include an inner bushing and an outer bushing made of a metal material and an elastic vibration isolation layer fixed between the inner bushing and the outer bushing.

2. The leaf spring suspension system according to claim 1, wherein both ends of the inner bushing in the axial direction protrude from the corresponding ends of the outer bushing, respectively, and one end of the inner bushing abuts against the inner wall surface of the first shackle plate and the other end abuts against the inner wall surface of the second shackle plate.

3. The leaf spring suspension system according to claim 1, wherein the first bushing is interference fit mounted within the eye and the outer bushing of the first bushing is axially flush with the respective end of the eye at each end, and/or,

The second bushing is installed in the shaft sleeve in an interference fit mode, and two ends of the outer bushing of the second bushing in the axial direction are flush with corresponding ends of the shaft sleeve respectively.

4. The leaf spring suspension system of claim 3 wherein the first and second shackle plates each have a first threaded bore therethrough for the first threaded fastener and a second threaded bore therethrough for the second threaded fastener.

5. The leaf spring suspension system of claim 1 wherein the resilient vibration isolation layer is configured as a rubber layer that is vulcanized formed between the inner bushing and the outer bushing.

6. The leaf spring suspension system according to claim 1 wherein the connecting member comprises a U-shaped plate mounted between the first and second shackle plates, the U-shaped plate comprising a first flat plate portion and two oppositely disposed second flat plate portions, the first flat plate portion being connected to the mount and being disposed between the two second flat plate portions for connecting the two second flat plate portions, the two second flat plate portions each having a mounting hole disposed thereon, the two mounting holes being oppositely disposed,

The two ends of the shaft sleeve in the axial direction are respectively fixed in the corresponding mounting holes.

7. The leaf spring suspension system of claim 6 wherein the axial ends of the bushing extend at least flush with the outer end of the second planar portion.

8. The leaf spring suspension system according to claim 1, wherein the first and/or second threaded fasteners are configured as bolts comprising a head portion and a shank portion, one end of the shank portion being connected to the head portion and the other end passing sequentially through the first shackle plate, the corresponding bushing and the second shackle plate, and an end of the shank portion remote from the head portion being secured to an outer side of the second shackle plate by a nut,

Wherein the nut is configured as a self-locking nut.

9. The leaf spring suspension system of claim 1 wherein the first shackle plate is configured as a stamping; and/or the second shackle plate is configured as a stamping; and/or the mounting base is configured as a stamping; and/or the connecting piece is constructed as a stamping.

10. A vehicle, characterized in that it is provided with a leaf spring suspension system according to any one of claims 1-9.