CN213007470U

CN213007470U - Rear axle suspension system and vehicle with same

Info

Publication number: CN213007470U
Application number: CN202021818673.5U
Authority: CN
Inventors: 罗义成; 徐兆峰; 梁世广; 谢毅; 秦宬
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-04-20
Anticipated expiration: 2030-08-26

Abstract

The utility model discloses a rear axle suspension system and vehicle that has it, rear axle suspension system includes: a frame assembly; the front suspension mechanism is rigidly connected with the frame assembly; the axle mounting bracket is rigidly connected with the frame assembly; an axle having a front portion mounted to the front suspension mechanism and a rear portion mounted to the axle mounting bracket; the front suspension vibration reduction piece is arranged between the front portion of the axle and the front suspension mechanism, and the rear suspension vibration reduction piece is arranged between the rear portion of the axle and the axle mounting bracket. According to the utility model discloses rear axle suspension system has not only simplified the structure, has reduced the cost, has still compromise the requirement of damping, has improved travelling comfort and reliability.

Description

Rear axle suspension system and vehicle with same

Technical Field

The utility model belongs to the technical field of the vehicle technique and specifically relates to a rear axle suspension system and vehicle that has it are related to.

Background

In the vehicle in the related art, a rear axle suspension system structure usually adopts a leaf spring or an air spring, and for a port vehicle, the rear axle suspension system adopts full rigid connection based on the working condition of low speed and low impact, so that the structure is simplified, and the cost is reduced. However, since the port vehicle usually has a large load, any small excitation from the road surface can be completely transmitted or even amplified to the axle and the frame through the rigid suspension, which seriously affects the comfort, increases the internal stress of the axle and is not favorable for the reliability.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a rear axle suspension system, this rear axle suspension system has not only simplified the structure, the cost is reduced, has still compromise the requirement of damping, has improved travelling comfort and reliability.

The utility model also provides a vehicle of having above-mentioned rear axle suspension system.

To achieve the above object, according to an embodiment of the first aspect of the present invention, there is provided a rear axle suspension system, including: a frame assembly; the front suspension mechanism is rigidly connected with the frame assembly; the axle mounting bracket is rigidly connected with the frame assembly; an axle having a front portion mounted to the front suspension mechanism and a rear portion mounted to the axle mounting bracket; the front suspension vibration reduction piece is arranged between the front portion of the axle and the front suspension mechanism, and the rear suspension vibration reduction piece is arranged between the rear portion of the axle and the axle mounting bracket.

According to the utility model discloses rear axle suspension system has not only simplified the structure, has reduced the cost, has still compromise the requirement of damping, has improved travelling comfort and reliability.

According to some embodiments of the invention, each of the front suspension damper and the rear suspension damper comprises: the first rigid layer and the second rigid layer are arranged at intervals; a flexible layer disposed between the first rigid layer and the second rigid layer; wherein each of the front and rear suspension dampers is provided with at least one mounting hole passing through the first rigid layer, the flexible layer, and the second rigid layer.

According to some embodiments of the utility model, the axle includes: an axle housing assembly; a transmission mounted to the axle housing assembly; a drive motor mounted to the transmission; wherein, the derailleur install in front suspension mechanism just front suspension damping piece is located the derailleur with between the front suspension mechanism, axle housing unit mount in axle installing support just rear suspension damping piece is located the axle housing unit with between the axle installing support.

Further, the axle housing assembly includes: the lower mounting support is connected with the upper mounting support and is positioned below the upper mounting support; an axle housing, an end of the axle housing being secured between the upper and lower mounting supports; the upper mounting support is mounted on the axle mounting bracket, and the rear suspension vibration damping piece is arranged between the upper mounting support and the axle mounting bracket.

Furthermore, the lower mounting support is connected with the frame assembly through a pulling plate, and two ends of the pulling plate are respectively connected with the lower mounting support and the frame assembly in a rotating mode.

Further, the surface of the upper mounting support facing the lower mounting support is provided with at least two upper limiting bulges, the surface of the lower mounting support facing the upper mounting support is provided with at least two lower limiting bulges, and the end part of the axle housing is limited between the at least two upper limiting bulges and between the at least two lower limiting bulges; and the surface of the lower mounting support, which faces away from the upper mounting support, is provided with a mounting seat connecting plate, and the two ends of the pulling plate are respectively connected with the mounting seat connecting plate and the frame assembly in a rotating manner.

According to some embodiments of the invention, the front suspension mechanism comprises: suspending a beam; the two ends of the suspension cross beam are respectively mounted on the frame assembly through the suspension mounting brackets; the front part of the axle is provided with a connecting support, the connecting support is arranged at the center of the length direction of the suspension cross beam, and the front suspension vibration damping piece is arranged between the connecting support and the suspension cross beam.

According to some embodiments of the utility model, the frame assembly includes: the front suspension mechanism and the axle mounting bracket are both mounted on the main frame; the rear bracket is arranged at the rear end of the main frame and is connected with the rear part of the axle through a pull plate, and two ends of the pull plate are respectively connected with the rear bracket and the rear part of the axle in a rotating manner.

Further, the main frame includes: the front suspension mechanism is mounted on the first longitudinal beam and/or the second longitudinal beam, the axle mounting brackets are mounted on the first longitudinal beam and/or the second longitudinal beam, the number of the rear brackets is two, and the two rear brackets are respectively mounted at the rear end of the first longitudinal beam and the rear end of the second longitudinal beam and are connected through a rear bottom plate; the two ends of each transverse beam are respectively connected with the first longitudinal beam and the second longitudinal beam, and the transverse beams are arranged at intervals along the length direction of the first longitudinal beam and the length direction of the second longitudinal beam.

According to some embodiments of the invention, the rear bracket comprises: the upper end of the side big plate is mounted on the main frame; the profile plate is connected to the lower end of the side big plate; the axle connecting plate is connected to the profile plate and is connected with the rear portion of the axle through the pulling plate, and two ends of the pulling plate are respectively connected with the axle connecting plate and the rear portion of the axle in a rotating mode.

According to some embodiments of the utility model, the axle installing support is two and is located respectively the left and right sides of frame assembly, the rear portion and two of axle the mounting point of axle installing support and the front portion of axle with the mounting point of front suspension is located triangle-shaped's three apex.

According to the utility model discloses an embodiment of second aspect provides a vehicle, disposes according to the utility model discloses a rear axle suspension system of first aspect embodiment.

According to the utility model discloses vehicle, through utilizing according to the utility model discloses the embodiment of first aspect rear axle suspension system not only simplify the structure, the cost is reduced, still compromise the requirement of damping, improved travelling comfort and reliability.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a rear axle suspension system according to an embodiment of the present invention;

fig. 2 is a bottom view of a rear axle suspension system according to an embodiment of the present invention;

fig. 3 is a schematic structural view of an axle of a rear axle suspension system according to an embodiment of the present invention;

fig. 4 is a schematic structural view of another angle of an axle of a rear axle suspension system according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of an axle mounting bracket of a rear axle suspension system according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a front suspension damper of a rear axle suspension system according to an embodiment of the present invention;

fig. 7 is a schematic structural view of an upper mounting bracket of a rear axle suspension system according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a lower mounting bracket of a rear axle suspension system according to an embodiment of the present invention.

Reference numerals:

a rear axle suspension system 1,

Frame assembly 100, main frame 110, rear bracket 120, side big plate 121, profile plate 122, axle connecting plate 123,

A rear floor 124, a first stringer 130, a second stringer 140,

A front suspension mechanism 200, a suspension cross beam 210, a suspension mounting bracket 220,

Axle mounting bracket 300, horizontal support surface 310, vertical support surface 320,

Axle 400, axle housing assembly 410, axle housing 411, upper mounting bracket 412, lower mounting bracket 413, tie plate 414,

An upper limit bulge 415, a lower limit bulge 416, a mounting seat connecting plate 417, a transmission 420, a lug boss 421,

A driving motor 430, a connecting bracket 440,

Front suspension damper 500, first rigid layer 510, second rigid layer 520, flexible layer 530, mounting holes 540,

A rear suspension vibration damping member 600,

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.

In the description of the present invention, "a plurality" means two or more, and "a plurality" means one or more.

A rear axle suspension system 1 according to an embodiment of the present invention is described below with reference to the drawings.

As shown in fig. 1-8, a rear axle suspension system 1 according to an embodiment of the present invention includes a frame assembly 100, a front suspension mechanism 200, an axle mounting bracket 300, an axle 400, a front suspension damper 500, and a rear suspension damper 600.

Front suspension 200 is rigidly connected to frame assembly 100. The axle mounting bracket 300 is rigidly connected to the frame assembly 100. The front of the axle 400 is mounted to the front suspension 200 and the rear is mounted to the axle mounting bracket 300. Front suspension damper 500 is disposed between the front portion of axle 400 and front suspension mechanism 200, and rear suspension damper 600 is disposed between the rear portion of axle 400 and axle mounting bracket 300.

For example, the front suspension mechanism 200 and the front suspension damper 500 are located at the front of the axle 400, and the axle mounting bracket 300 and the rear suspension damper 600 are located at the rear of the axle 400. Frame assembly 100 is positioned above axle 400 and rigidly connected to front suspension mechanism 200 and axle mounting bracket 300, respectively, and front suspension damper element 500 and rear suspension damper element 600 are substantially identical in structure and positioned between axle 400 and frame assembly 100 to provide damping therebetween.

According to the utility model discloses a rear axle suspension system 1, through front suspension mechanism 200 and axle installing support 300, all form rigid connection on frame assembly 100, and through setting up front suspension damping piece 500 and rear suspension damping piece 600, thereby adopt the structure that rigid connection and damping combined together, realize frame assembly 100 and axle 400's connection, because bearing structure (front suspension mechanism 200 and axle installing support 300) are the rigid piece, steel sheet spring and air spring have been replaced, and then a large amount of spare parts have been reduced, the structure is simplified and the cost can be reduced, and through setting up front suspension damping piece 500 and rear suspension damping piece 600, the excitation that comes from the road surface has been reduced, and then driving comfort and reliability have been improved.

Therefore, according to the utility model discloses rear axle suspension system 1 has not only simplified structure, reduce cost, has still compromise the requirement of damping, has improved travelling comfort and reliability.

In some embodiments of the present invention, as shown in fig. 1, the frame assembly 100 includes a main frame 110 and a rear bracket 120.

The front suspension mechanism 200 and the axle mounting bracket 300 are both mounted to the main frame 110. The rear bracket 120 is mounted to the rear end of the main frame 110 and is connected to the rear portion of the axle 400 by a pulling plate 414, and both ends of the pulling plate 414 are rotatably connected to the rear bracket 120 and the rear portion of the axle 400, respectively.

For example, the main frame 110 is located above the front suspension mechanism 200 and the axle mounting bracket 300, the front suspension mechanism 200 may be rigidly connected to the main frame 110 by bolts, the axle mounting bracket 300 may be rigidly connected to the main frame 110 by bolts, and both ends of the tie plate 414 are rotatably connected to the rear bracket 120 and the rear portion of the axle 400 by bolts, respectively.

Specifically, as shown in fig. 2, the main frame 110 may be a side rail frame, and the main frame 110 includes a first side rail 130, a second side rail 140, and a plurality of cross members (not shown).

The first longitudinal beam 130 and the second longitudinal beam 140 are arranged in parallel and at intervals, the first longitudinal beam 130 and the second longitudinal beam 140 extend along the front-rear direction, the front suspension mechanism 200 is mounted on the first longitudinal beam 130 and/or the second longitudinal beam 140, the axle mounting brackets 300 are mounted on the first longitudinal beam 130 and/or the second longitudinal beam 140, the number of the rear brackets 120 is two, and the two rear brackets 120 are respectively mounted at the rear end of the first longitudinal beam 130 and the rear end of the second longitudinal beam 140 and are connected through the rear bottom plate 124.

Both ends of each cross beam are respectively connected with the first longitudinal beam 130 and the second longitudinal beam 140, and a plurality of cross beams are arranged at intervals along the length direction of the first longitudinal beam 130 and the length direction of the second longitudinal beam 140. For example, the first longitudinal member 130 and the second longitudinal member 140 may be arranged in a left-right symmetrical manner, and the two rear brackets 120 are mounted on the rear ends of the first longitudinal member 130 and the second longitudinal member 140 in a left-right symmetrical manner.

For example, as shown in fig. 1 and 2, in the rear axle suspension system 1, the front suspension mechanism 200 and the axle mounting bracket 300 are mounted on the first longitudinal beam 130 and the second longitudinal beam 140, and the axle 400 is connected with the first longitudinal beam 130 and the second longitudinal beam 140 in the left-right direction, so that the assembly is more stable. By configuring the first and second

longitudinal beams

130, 140, space for mounting the front suspension 200 and the axle mounting bracket 300 may be provided in both the left and right directions of the axle 400. And the two rear brackets 120 are connected at the lower portion by the rear floor 124, the mounting stability of the rear brackets 120 is improved. The plurality of cross members span the first longitudinal member 130 and the second longitudinal member 140, and serve to increase the structural strength of the first longitudinal member 130 and the second longitudinal member 140 at a plurality of positions in the front-rear direction. The tie plate 414 is installed at the lower portions of the axle 400 and the rear carrier, and the rear bracket 120 and the axle 400 are rotatably connected by the tie plate 414, so that the stability of the axle 400 is further improved, and the deformation of the front suspension damper 500 and the rear suspension damper 600 can be adapted.

As shown in fig. 5, the axle mounting bracket 300 is configured as a chair-like casting structure having a horizontal support surface 310 and a vertical support surface 320, the horizontal support surface 310 and the vertical support surface 320 are perpendicular to each other, the side surfaces of the first longitudinal beam 130 and the second longitudinal beam 140 are attached to the vertical support surface 320, the lower wing surfaces of the first longitudinal beam 130 and the second longitudinal beam 140 are respectively attached to the horizontal support surface 310, and the axle 400 is not separated from the rear bracket 120 during the process of assembling and disassembling the axle 400.

Further, as shown in fig. 1, the rear bracket 120 is a welded bracket, and the rear bracket 120 includes a side large plate 121, a cam plate 122, and an axle attachment plate 123.

The upper end of the side large plate 121 is mounted to the main frame 110. The profile plate 122 is connected to the lower end of the side large plate 121. The axle attachment plate 123 is attached to the profile plate 122 and is attached to the rear of the axle 400 by a pull plate 414, the two ends of the pull plate 414 being pivotally attached to the axle attachment plate 123 and the rear of the axle 400, respectively. The rear bracket 120 and the main frame 110 form a generally L-shaped structure.

Specifically, the rear bracket 120 is formed by welding together the side large plate 221, the axle connecting plate 123 and the cam plate 122, the side large plate 121 is a U-shaped stamped plate with a wide bottom surface and a shallow flange, the upper bottom surface of the side large plate is connected with the first longitudinal beam 130 or the second longitudinal beam 140, and the lower bottom surface of the side large plate is welded perpendicularly to the cam plate 122. The profile plate 122 is a U-shaped stamped plate with a narrow bottom surface and a deep flanging, the profile plate 122 is connected to the lower end of the large side plate 121, and the large side plate 121 and the profile plate 122 are arranged perpendicular to each other. The axle connecting plate 123 is perpendicularly welded at the bent edge of the front part of the profile plate 122, is approximately triangular in shape, protrudes forwards at a vertex angle, and is provided with a connecting hole suitable for being connected with a pull plate 414 through a bolt at the position close to the vertex angle, so that the axle connecting plate 123 and the axle 400 are connected.

In some embodiments of the present invention, as shown in fig. 1 and 2, the front suspension mechanism 200 includes a suspension cross member 210 and a suspension mounting bracket 220.

Both ends of the suspension cross member 210 are respectively mounted to the frame assembly 100 by suspension mounting brackets 220. For example, the suspension cross beam 210 is a U-shaped stamped cross beam, the suspension cross beam 210 extends in the left-right direction, the left and right ends of the suspension cross beam 210 are respectively welded to the suspension mounting brackets 220 perpendicularly, the suspension mounting brackets 220 are L-shaped plate members, the upper portions of the suspension mounting brackets 220 are connected to the lower wing surfaces of the first longitudinal beam 130 and the second longitudinal beam 140 by bolts, and thus the left and right ends of the suspension cross beam 210 are respectively mounted to the first longitudinal beam 130 and the second longitudinal beam 140 by the suspension mounting brackets 220.

The front portion of the axle 400 is provided with a link bracket 440, the link bracket 440 is an L-shaped plate member, the link bracket 440 is installed at the center in the length direction of the suspension cross member 210, and the front suspension damper 500 is provided between the link bracket 440 and the suspension cross member 210, for example, the link bracket 440 and the suspension cross member 210 may be connected by a bolt passing through the front suspension damper 500.

In this manner, the suspension cross beam 210 provides a mounting carrier for the attachment bracket 440. In addition, the left end and the right end of the suspension beam 210 are mounted with the suspension mounting bracket 220, so that certain structural strength is achieved, and the assembly stability of the connecting bracket 440 is ensured.

In some embodiments of the present invention, as shown in fig. 2, the axle mounting brackets 300 are two and located on the left and right sides of the frame assembly 100, for example, on the rear portion of the first longitudinal beam 130 and the rear portion of the second longitudinal beam 140, respectively, and the mounting points of the rear portion of the axle 400 and the two axle mounting brackets 300 and the mounting points of the front portion of the axle 400 and the front suspension 200 are located at the three vertices of a triangle.

Therefore, the connecting lines of the three mounting points form an isosceles triangle shape, the three mounting points share the stress of the axle 400 together, so that the axle 400 bears smaller forces in the front-back direction and the left-right direction, the stress is more uniform, and the axle has good structural stability. In addition, the mounting point at the rear of the axle 400 and the mounting point at the front of the axle 400 form a rigid and flexible combined connection through a three-point suspension structure, which takes cost and vibration damping into consideration.

In some embodiments of the present invention, as shown in fig. 6, the front suspension damper 500 includes a first rigid layer 510, a second rigid layer 520, and a flexible layer 530. For example, the first rigid layer 510, the flexible layer 530, and the second rigid layer 520 have the same shape of the bottom surface, and are cuboids having a large bottom surface and a small height, and the first rigid layer 510 and the second rigid layer 520 may have the same size and larger than the flexible layer 530. The second rigid layer 520 and the first rigid layer 510 are spaced apart. The flexible layer 530 is disposed between the first rigid layer 510 and the second rigid layer 520. Wherein the front suspension damper 500 is provided with at least one mounting hole 540 through the first rigid layer 510, the flexible layer 530 and the second rigid layer 520. For example, the mounting holes 540 may be four and located at four corners of the front suspension damper 500, respectively.

Specifically, the first rigid layer 510 of the front suspension damper 500 is cooperatively mounted with the suspension cross member 210, and the second rigid layer 520 of the front suspension damper 500 is cooperatively mounted with the suspension mounting bracket 220. The first rigid layer 510, the flexible layer 530, and the second rigid layer 520 are mounted by providing mounting holes 540 through which bolts are fitted.

The first rigid layer 510 and the second rigid layer 520 of the front suspension damper 500 may be made of a metal plate, and the flexible layer 530 may be made of a rubber material, such as natural vulcanized rubber, and is disposed between the first rigid layer 510 and the second rigid layer 520 through the flexible layer 530, so that the deformation range of the front suspension damper 500 can be effectively controlled, and the structural strength of the entire vehicle is ensured. Meanwhile, the vibration reduction characteristic of the flexible layer 530 is utilized to provide vibration reduction for the axle 400, the probability of damage of parts is reduced, and the comfort of personnel is improved. And the arrangement of the first rigid layer 510 and the second rigid layer 520 can not only effectively protect the flexible layer 530, but also ensure the installation strength with the suspension beam 210 and the suspension installation bracket 220.

In some embodiments of the present invention, as shown in fig. 3 and 4, the axle 400 includes an axle housing assembly 410, a transmission 420, and a drive motor 430.

Transmission 420 is mounted to axle housing assembly 410. The drive motor 430 is mounted to the transmission 420, the axle housing assembly 410 extends in the left-right direction, and both the transmission 420 and the drive motor 430 are located at the front portion of the axle housing assembly 410. Wherein transmission 420 is mounted to front suspension mechanism 200 and front suspension damper 500 is disposed between transmission 420 and front suspension mechanism 200, axle housing assembly 410 is mounted to axle mounting bracket 300 and rear suspension damper 600 is disposed between axle housing assembly 410 and axle mounting bracket 300.

For example, the drive motor 430 may be provided with a coupling flange on a housing thereof, which is bolted to the housing of the transmission 420, and the transmission 420 is bolted to the axle housing assembly 410. And, the other end of the axle housing assembly 410 is provided with a threaded hole and a threaded hole.

The front of the transmission 420 may be provided with a boss 421 protruding forward, and the connection bracket 440 is mounted to the boss 421 and to the suspension cross member 210 through the front suspension damper 500.

In some embodiments of the present invention, as shown in fig. 4, axle housing assembly 410 includes an upper mounting support 412, a lower mounting support 413, and an axle housing 411.

Lower mounting bracket 413 is coupled to upper mounting bracket 412 and is positioned below upper mounting bracket 412. The upper mount holder 412 and the lower mount holder 413 may be two sets arranged at intervals in the left-right direction, and the end portions (left end and right end) of the axle case 411 are fixed between the corresponding sets of the upper mount holder 412 and the lower mount holder 413. Wherein upper mounting bracket 412 is mounted to axle mounting bracket 300 and rear suspension damper 600 is disposed between upper mounting bracket 412 and axle mounting bracket 300. For example, upper mount 412 and lower mount 413 are coupled by bolts passing through rear suspension damper 600. Thus, the end portion of axle housing 411 is fixed between upper mounting bracket 412 and lower mounting bracket 413, and axle housing 411 has good assembling stability and damping performance.

It will be appreciated that axle housing assembly 410 may also include brakes, wheel reduction assemblies, etc., which will not be described in detail herein.

In some embodiments of the present invention, the structure of the rear suspension damper 600 may be the same as that of the front suspension damper 500, for example, as shown in fig. 6, and the rear suspension damper 600 includes a first rigid layer 510, a second rigid layer 520, and a flexible layer 530. For example, the first rigid layer 510, the flexible layer 530, and the second rigid layer 520 have the same shape of the bottom surface, and are cuboids having a large bottom surface and a small height, and the first rigid layer 510 and the second rigid layer 520 may have the same size and larger than the flexible layer 530.

The second rigid layer 520 and the first rigid layer 510 are spaced apart. The flexible layer 530 is disposed between the first rigid layer 510 and the second rigid layer 520. Wherein the rear suspension vibration damper 600 is provided with at least one mounting hole 540 penetrating the first rigid layer 510, the flexible layer 530 and the second rigid layer 520. For example, the mounting holes 540 may be four and located at four corners of the front suspension damper 500, respectively.

Specifically, first rigid layer 510 of rear suspension damper 600 is cooperatively mounted with axle mounting bracket 300, and second rigid layer 520 of rear suspension damper 600 is cooperatively mounted with upper mounting bracket 412. The first rigid layer 510, the flexible layer 530, and the second rigid layer 520 are mounted by providing mounting holes 540 through which bolts are fitted.

The first rigid layer 510 and the second rigid layer 520 of the rear suspension damper 600 may be made of a metal plate, and the flexible layer 530 may be made of a rubber material, such as natural vulcanized rubber, and is disposed between the first rigid layer 510 and the second rigid layer 520 through the flexible layer 530, so that the deformation range of the front suspension damper 500 can be effectively controlled, and the structural strength of the entire vehicle is ensured. Meanwhile, the vibration reduction characteristic of the flexible layer 530 is utilized to provide vibration reduction for the axle 400, the probability of damage of parts is reduced, and the comfort of personnel is improved. And the arrangement of first rigid layer 510 and second rigid layer 520 not only can effectively protect flexible layer 530, but also can ensure the mounting strength with axle mounting bracket 300 and upper mounting bracket 412.

In addition, the axle mounting bracket 300 is also provided with mounting holes corresponding to the positions of the mounting holes 540 of the rear suspension vibration damper 600, the mounting holes of the axle mounting bracket 300 correspond to the positions of the mounting holes of the upper mounting support 412 and the lower mounting support 413, and the axle mounting bracket 300, the rear suspension vibration damper 600, the upper mounting support 412 and the lower mounting support 413 can be penetrated through simultaneously through long bolts, so that the number of bolts is reduced, and the mounting firmness of the rear suspension vibration damper 600 is ensured.

In some embodiments of the present invention, as shown in fig. 1, the lower mounting support 413 is connected to the frame assembly 100 through a pulling plate 414, and two ends of the pulling plate 414 are rotatably connected to the lower mounting support 413 and the frame assembly 100, respectively. Specifically, both ends of the pulling plate 414 are rotatably connected to the lower mounting bracket 413 and the axle connecting plate 123, respectively.

In some embodiments of the present invention, as shown in fig. 7 and 8, the surface of upper mounting support 412 facing lower mounting support 413 is provided with at least two upper limiting protrusions 415, the surface of lower mounting support 413 facing upper mounting support 412 is provided with at least two lower limiting protrusions 416, and the end of axle housing 411 is limited between at least two upper limiting protrusions 415 and between at least two lower limiting protrusions 416. From this, can be with the tip location of axle case 411 between last erection support 412 and lower erection support 413, not only can further improve the stability of axle 400, in the assembling process, carry out prepositioning earlier moreover, can be convenient for follow-up construction bolt's operation.

The surface (i.e., the lower surface) of lower mounting bracket 413 facing away from upper mounting bracket 412 is provided with a mounting bracket connection plate 417, and two ends of pulling plate 414 are rotatably connected to mounting bracket connection plate 417 and axle connection plate 123 of frame assembly 100, respectively.

In this manner, by configuring the mount connection plate 417 at the lower mount 413, for example, the mount connection plate 417 is a triangular plate, providing a carrier for the connection of the pulling plate 414, thereby making the connection of the pulling plate 414 and the lower mount 413 more stable. In addition, two sides of the mounting seat connection plate 417 may be further connected with a reinforcing rib perpendicular to the mounting seat connection plate 417, so as to provide additional reinforcement for the mounting seat connection plate 417.

Further, the upper mounting support 412 and the lower mounting support 413 may be both of a casting structure and both welded to the axle housing 411, thereby further improving structural stability.

A vehicle according to an embodiment of the invention, which may be a port vehicle, is described below.

According to the utility model discloses vehicle configuration has good grounds utility model the rear axle suspension system 1 of above-mentioned embodiment.

According to the utility model discloses vehicle, through adopting the basis the utility model discloses the rear axle suspension system 1 of above-mentioned embodiment has not only simplified the structure, has reduced the cost, has still compromise the requirement of damping, has improved travelling comfort and reliability.

Other constructions and operations of the rear axle suspension system and the vehicle having the same according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description herein, references to the description of the terms "particular embodiment," "particular example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A rear axle suspension system, comprising:

a frame assembly;

the front suspension mechanism is rigidly connected with the frame assembly;

the axle mounting bracket is rigidly connected with the frame assembly;

an axle having a front portion mounted to the front suspension mechanism and a rear portion mounted to the axle mounting bracket;

the front suspension vibration reduction piece is arranged between the front portion of the axle and the front suspension mechanism, and the rear suspension vibration reduction piece is arranged between the rear portion of the axle and the axle mounting bracket.

2. The rear axle suspension system of claim 1, wherein each of the front and rear suspension dampers comprises:

the first rigid layer and the second rigid layer are arranged at intervals;

a flexible layer disposed between the first rigid layer and the second rigid layer;

wherein each of the front and rear suspension dampers is provided with at least one mounting hole passing through the first rigid layer, the flexible layer, and the second rigid layer.

3. The rear axle suspension system of claim 1, wherein the axle includes:

an axle housing assembly;

a transmission mounted to the axle housing assembly;

a drive motor mounted to the transmission;

wherein, the derailleur install in front suspension mechanism just front suspension damping piece is located the derailleur with between the front suspension mechanism, axle housing unit mount in axle installing support just rear suspension damping piece is located the axle housing unit with between the axle installing support.

4. The rear axle suspension system of claim 3 wherein said axle housing assembly comprises:

the lower mounting support is connected with the upper mounting support and is positioned below the upper mounting support;

an axle housing, an end of the axle housing being secured between the upper and lower mounting supports;

the upper mounting support is mounted on the axle mounting bracket, and the rear suspension vibration damping piece is arranged between the upper mounting support and the axle mounting bracket.

5. The rear axle suspension system of claim 4, wherein the lower mounting bracket is connected to the frame assembly by a tie plate, and wherein two ends of the tie plate are rotatably connected to the lower mounting bracket and the frame assembly, respectively.

6. The rear axle suspension system of claim 5 wherein the surface of said upper mounting bracket facing said lower mounting bracket is provided with at least two upper limit projections and the surface of said lower mounting bracket facing said upper mounting bracket is provided with at least two lower limit projections, the ends of said axle housing being restrained between said at least two upper limit projections and between said at least two lower limit projections;

and the surface of the lower mounting support, which faces away from the upper mounting support, is provided with a mounting seat connecting plate, and the two ends of the pulling plate are respectively connected with the mounting seat connecting plate and the frame assembly in a rotating manner.

7. The rear axle suspension system of claim 1, wherein the front suspension mechanism comprises:

suspending a beam;

the two ends of the suspension cross beam are respectively mounted on the frame assembly through the suspension mounting brackets;

the front part of the axle is provided with a connecting support, the connecting support is arranged at the center of the length direction of the suspension cross beam, and the front suspension vibration damping piece is arranged between the connecting support and the suspension cross beam.

8. The rear axle suspension system of claim 1, wherein the frame assembly includes:

the front suspension mechanism and the axle mounting bracket are both mounted on the main frame;

the rear bracket is arranged at the rear end of the main frame and is connected with the rear part of the axle through a pull plate, and two ends of the pull plate are respectively connected with the rear bracket and the rear part of the axle in a rotating manner.

9. The rear axle suspension system of claim 8, wherein the main frame comprises:

the front suspension mechanism is mounted on the first longitudinal beam and/or the second longitudinal beam, the axle mounting brackets are mounted on the first longitudinal beam and/or the second longitudinal beam, the number of the rear brackets is two, and the two rear brackets are respectively mounted at the rear end of the first longitudinal beam and the rear end of the second longitudinal beam and are connected through a rear bottom plate;

the two ends of each transverse beam are respectively connected with the first longitudinal beam and the second longitudinal beam, and the transverse beams are arranged at intervals along the length direction of the first longitudinal beam and the length direction of the second longitudinal beam.

10. The rear axle suspension system of claim 8, wherein the rear bracket includes:

the upper end of the side big plate is mounted on the main frame;

the profile plate is connected to the lower end of the side big plate;

the axle connecting plate is connected to the profile plate and is connected with the rear portion of the axle through the pulling plate, and two ends of the pulling plate are respectively connected with the axle connecting plate and the rear portion of the axle in a rotating mode.

11. The rear axle suspension system of claim 1, wherein the axle mounting brackets are two and located on each of the left and right sides of the frame assembly, and the mounting points of the rear portion of the axle to the two axle mounting brackets and the mounting points of the front portion of the axle to the front suspension mechanism are located at the three vertices of a triangle.

12. A vehicle, characterized in that it is provided with a rear axle suspension system according to any one of claims 1-11.