Integrated rear suspension for vehicle

Abstract

The invention relates to the field of automobile power assemblies, and particularly discloses an integrated rear suspension for a vehicle, which comprises a rear bracket, the rear bracket is provided with a containing cavity, the containing cavity penetrates through the rear bracket along a first direction, the end face of the rear bracket in a second direction is provided with an opening, the opening is communicated with the containing cavity, and the opening is communicated with the containing cavity. The first direction is perpendicular to the second direction; the rear suspension cushion assembly is arranged in the containing cavity, at least part of the rear suspension cushion assembly extends to the position above the containing cavity, the rear suspension cushion assembly comprises a fixing part located above the containing cavity, and the fixing part is connected with a power assembly; the connecting piece is fixedly connected with the rear suspension cushion assembly and the rear support in the second direction. The rear suspension cushion assembly is internally arranged and fixed in the containing cavity of the rear support, and high integration of the rear suspension cushion assembly and the containing cavity is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile powertrain technology, in particular to an integrated rear suspension for a vehicle. BACKGROUND

[0002] In a vehicle, especially a vehicle with a longitudinal engine, the rear suspension system is usually arranged at the lower part of the rear end of the transmission. The design space is strictly limited, with the powertrain above and the maximum turning angle of the vehicle below. In this small space, the rear suspension cushion assembly and its support structure need to be arranged reasonably.

[0003] The traditional rear suspension design usually adopts a split structure, that is, the rear suspension cushion assembly and the rear support are two independent parts. The common arrangement is to install the rear suspension cushion assembly on the upper part of the rear support, and the two are connected and fixed by bolts and other fasteners.

[0004] Although this split arrangement and connection method is simple in structure, it has inherent limitations in space utilization. The rear support body will inevitably occupy part of the rear suspension design space in order to provide sufficient mounting and supporting surface. This occupation of space to some extent restricts the optimization of the overall structure of the rear suspension system, making it difficult to achieve more ideal mechanical properties and arrangement in a limited space. SUMMARY

[0005] The purpose of the present application is to solve the problem that the existing split rear suspension occupies too much design space due to its structural layout, making it difficult to optimize the structure in a compact space. The present application achieves the high integration of the rear suspension cushion assembly and the rear support by embedding and fixing the rear suspension cushion assembly in the accommodating cavity of the rear support.

[0006] To achieve the above-mentioned purpose, the present application provides an integrated rear suspension for a vehicle, comprising: a rear support provided with an accommodating cavity, the accommodating cavity penetrating through the rear support along a first direction, an end surface of the rear support in a second direction being provided with an opening, the opening being in communication with the accommodating cavity, the first direction being perpendicular to the second direction; a rear suspension cushion assembly, the rear suspension cushion assembly being arranged in the accommodating cavity and at least partially extending above the accommodating cavity, the rear suspension cushion assembly comprising a fixed part above the accommodating cavity, the fixed part being connected with a powertrain; a connecting piece, the connecting piece fixedly connecting the rear suspension cushion assembly and the rear support along the second direction.

[0007] The integrated rear suspension for the vehicle has the advantages that the rear suspension cushion assembly is embedded in the accommodating cavity of the rear support, and the rear suspension cushion assembly and the rear support are assembled together from the front-to-rear direction of the vehicle through the connecting piece, so that the rear suspension cushion assembly and the rear support overlap in the vertical direction, instead of being stacked together in the up-and-down direction in the prior art. The common height space design greatly reduces the height of the entire rear suspension system in the first direction, and the structure is compact. Moreover, the accommodating cavity of the rear support not only provides mounting space for the rear suspension cushion assembly, but also restricts the rear suspension cushion assembly in the front-to-rear direction (the second direction) and the left-to-right direction (the third direction) by the inner wall of the accommodating cavity. The connecting piece directly bears the front-to-rear direction limiting function while completing the fixing function, and is stable and reliable. The lateral assembly through the opening from the front of the vehicle has a wide operation space, facilitates the installation and tightening of the connecting piece, and also provides convenience for subsequent inspection and maintenance.

[0008] According to some embodiments of the present application, the rear suspension cushion assembly comprises an outer framework, a plurality of fixing portions are formed on the outer framework, and the plurality of fixing portions are located above the rear support; and an inner core assembly is arranged in the outer framework and is in interference fit with the outer framework.

[0009] According to some embodiments of the present application, the inner core assembly comprises an inner core, an installation hole is arranged on the inner core, the connecting piece passes through the installation hole and is fixed with the rear support; a main spring is sleeved outside the inner core; an outer tube is sleeved outside the main spring, and the outer tube is in interference fit in the outer framework; and the inner core, the main spring and the outer tube are vulcanized together.

[0010] According to some embodiments of the present application, one side of the outer framework is provided with a sleeve, and the inner core assembly is arranged in the sleeve and is in interference fit with the sleeve.

[0011] According to some embodiments of the present application, a protrusion is arranged on the peripheral wall of the inner core, and a groove matched with the protrusion is arranged on the inner peripheral wall of the main spring.

[0012] According to some embodiments of the present application, a reinforcing rib is arranged on the outer framework, and each fixing portion and the sleeve are connected through the reinforcing rib.

[0013] According to some embodiments of the present application, a limiting block is arranged on the side of the rear suspension cushion assembly facing the opening, and the limiting block abuts against the inner wall of the accommodating cavity.

[0014] According to some embodiments of the present application, two limiting bumpers are arranged along the width direction of the rear suspension cushion assembly, and the two limiting bumpers are respectively adjacent to two ends in the width direction of the opening.

[0015] According to some embodiments of the present application, the limiting bumpers are clamped or adhered to the rear suspension cushion assembly.

[0016] According to some embodiments of the present application, the upper end surface of the rear support is provided with a plurality of mounting portions.

[0017] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which: Figure 1 is an assembly schematic view of a rear support and a rear suspension cushion assembly according to an embodiment of the present application; Figure 2 is another view of the assembly of the rear support and the rear suspension cushion assembly according to an embodiment of the present application; Figure 3 is a structural schematic view of the rear suspension cushion assembly according to an embodiment of the present application.

[0019] REFERENCE NUMERALS 100, rear support; 101, accommodating cavity; 102, opening; 103, hollow structure; 104, mounting groove; 200, rear suspension cushion assembly; 1, outer framework; 11, fixed portion; 12, sleeve; 2, inner core assembly; 21, inner core; 211, mounting hole; 212, protrusion; 22, main spring; 221, groove; 23, outer tube; 3, reinforcing rib; 4, limiting bumper; 5, mounting portion. DETAILED DESCRIPTION

[0020] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals are used throughout the drawing figures to refer to the same or like elements or elements having the same or similar functionality. The embodiments described below are exemplary and are merely intended to explain the present application, and are not to be understood as limiting the present application.

[0021] The following description with reference to the accompanying drawings is provided to assist in understanding the embodiments of the present application. Figures 1-3 An integrated rear suspension for a vehicle according to embodiments of the present application is described below.

[0022] In the embodiment, the vertical direction of the vehicle is regarded as the first direction, the front-rear direction of the vehicle is regarded as the second direction, and the left-right direction of the vehicle is regarded as the third direction, and the first direction, the second direction and the third direction are perpendicular to each other, and the direction of the rear suspension is consistent with the reference direction of the vehicle. In this way, the embodiment of the application is described.

[0023] With reference to Figures 1-3 The application provides an integrated rear suspension for a vehicle, comprising a rear support 100, a rear suspension cushion assembly 200 and a connecting piece. The rear support 100 is fixedly connected with a vehicle body as a mounting base. The rear suspension cushion assembly 200 is a core component for supporting and damping, and is fixedly connected with a power assembly. The rear suspension cushion assembly 200 is arranged in a receiving cavity 101 of the rear support 100, and the rear suspension cushion assembly 200 and the rear support 100 are fixed together along a second direction through the connecting piece, so that high integration is achieved.

[0024] Specifically, the rear support 100 is provided with the receiving cavity 101, the receiving cavity 101 penetrates through the upper end face and the lower end face of the rear support 100 along a first direction, and the end face of the rear support 100 in the second direction is provided with an opening 102, the opening 102 is in communication with the receiving cavity 101, and the opening 102 can be located at the front end of the rear support 100. The first direction and the second direction are perpendicular to each other, the first direction is the height direction of the rear support 100, and the second direction is the front-rear direction of the rear support 100. The rear suspension cushion assembly 200 is arranged in the receiving cavity 101, and at least part of the rear suspension cushion assembly 200 extends out of the receiving cavity 101 and is located above the receiving cavity 101. The profile of the rear suspension cushion assembly 200 is matched with the receiving cavity 101, so that the stability of installation is ensured.

[0025] Further, the rear suspension cushion assembly 200 comprises a fixed part 11, the fixed part 11 is located at the upper part of the rear suspension cushion assembly 200, so that the fixed part 11 is located above the receiving cavity 101, and the fixed part 11 is connected with the power assembly. In this way, the weight and load of the power assembly directly act on the rear suspension cushion assembly 200.

[0026] The connecting piece fixedly connects the rear suspension cushion assembly 200 and the rear support 100 along the second direction. The connecting piece can pass through the opening 102, and the rear suspension cushion assembly 200 is fixed to the rear support 100 from the side of the rear suspension cushion assembly 200 facing the opening 102.

[0027] In addition, in the embodiment, the arrangement mode can make the rear support 100 adopt an approximately straight force transmission structure, and the several-shaped or large-radian bending formed for avoiding the traditional rear suspension cushion assembly 200 is avoided. This effectively avoids the performance loss caused by the weakening of the strength, the decrease of the dynamic stiffness of the connecting point and the poor modal frequency caused by the complex bending structure.

[0028] In a specific example, in the second direction of the rear bracket 100, the accommodating cavity 101 is adjacent to the front end of the rear bracket 100; in the third direction of the rear bracket 100, the accommodating cavity 101 is located at the middle position of the rear bracket 100, thereby facilitating the lateral installation of the connecting member, ensuring the symmetry of the structural stress, optimizing the overall stress distribution, and improving the system stability.

[0029] In some examples, the opening 102 extends in the third direction, and the size of the opening 102 in the third direction is defined as the width of the opening 102. Accordingly, the maximum width of the rear suspension cushion assembly 200 in the third direction is greater than the width of the opening 102, so that the rear suspension cushion assembly 200 can be constrained in the second direction through the opening 102, and the rear suspension cushion assembly 200 is not easy to be separated from the accommodating cavity 101. The maximum width of the rear suspension cushion assembly 200 is less than the width of the accommodating cavity 101. In the embodiment, the "width" refers to the extension direction of the component or the accommodating cavity 101 consistent with the third direction.

[0030] Reference Figure 1 , Figure 3 In some examples, the rear suspension cushion assembly 200 includes an outer framework 1 and an inner core assembly 2, and the outer contour shape of the outer framework 1 is adapted to the accommodating cavity 101. The upper end of the outer framework 1 extends upward in the first direction, so that at least part of the outer framework 1 extends out of the accommodating cavity 101 and is located above the rear bracket 100.

[0031] A plurality of fixing portions 11 are formed on the outer framework 1, and the plurality of fixing portions 11 are located above the rear bracket 100. The positions of the plurality of fixing portions 11 can be adapted to the plurality of connecting points of the power assembly, thereby ensuring the reliability of assembly. The inner core assembly 2 is an elastic body made of a high-performance rubber material, and the inner core assembly 2 is arranged in the outer framework 1 and is in interference fit with the outer framework 1. Specifically, the inner core assembly 2 is arranged on the side of the outer framework 1 facing the opening 102. The inner core assembly 2 is a main vibration isolation and load bearing element, responsible for absorbing and attenuating the vibration from the power assembly.

[0032] The fixing portion 11 can be a connecting bolt, which can be directly assembled with the corresponding position of the power assembly. In addition, the fixing portion 11 can also be a connecting structure formed on the outer framework 1, such as a connecting block with perforations, which can be assembled with the power assembly through bolts or other components such as fasteners.

[0033] Reference Figure 1 and Figure 2In some embodiments, the upper surface of the rear bracket 100 is provided with a plurality of ribs extending in the third direction, and the plurality of ribs are spaced apart in the second direction. The ribs can be formed by downwardly recessing the upper surface of the rear bracket 100. The ribs are located at a middle position of the rear bracket 100 and at the rear side of the accommodating cavity 101. The bottom of the rear bracket 100 is provided with a plurality of hollow structures 103 arranged in an array. While ensuring that the overall structural strength and stress distribution meet the requirements, the weight of the rear bracket 100 is effectively reduced.

[0034] Referring to Figure 1 , Figure 3 In some embodiments, the inner core assembly 2 includes an inner core 21, a main spring 22, and an outer tube 23. The inner core 21 is provided with a mounting hole 211 through which a connecting piece passes and is fixed with the rear bracket 100. Specifically, one end of the connecting piece abuts against the side of the inner core 21 facing the opening 102, and the other end of the connecting piece passes through the mounting hole 211 and is threadedly connected with the rear bracket 100. The axis of the inner core 21 extends in the second direction, and a plurality of weight-reducing holes can be provided on the end face of the inner core 21, effectively achieving lightweight. The main spring 22 is sleeved outside the inner core 21 and is made of rubber material. The outer tube 23 is sleeved outside the main spring 22 and is interference-fitted in the exoskeleton 1. After the inner core 21, the main spring 22, and the outer tube 23 are vulcanized together, they are assembled in the exoskeleton 1 by interference press-fitting, forming a rear suspension cushion assembly 200.

[0035] In order to improve the connection strength and reliability of the inner core 21 and the main spring 22, in some embodiments, a protrusion 212 is provided on the peripheral wall of the inner core 21, and the protrusion 212 is symmetrically provided with two about the center axis of the inner core 21. Correspondingly, the inner peripheral wall of the main spring 22 is provided with a groove 221 matched with the protrusion 212, thereby significantly enhancing the bonding strength of the inner core 21 and the main spring 22 and preventing relative twisting or axial disengagement of the two.

[0036] Referring to Figure 2 , Figure 3 In some embodiments, one side of the exoskeleton 1 is provided with a sleeve 12, and the inner core assembly 2 is arranged in the sleeve 12 and interference-fitted with the sleeve 12. The sleeve 12 can be integrally formed with the exoskeleton 1 and located at the side of the exoskeleton 1 facing the opening 102. The sleeve 12 can be located at a position adjacent to the center of the side wall of the exoskeleton 1, and the end of the sleeve 12 facing the opening 102 has a spacing from the opening 102.

[0037] Specifically, the outer tube 23 of the inner core assembly 2 is in interference fit with the sleeve 12 of the outer framework 1 to assemble the inner core assembly 2 on the outer framework 1. To further optimize the stress distribution and ensure the stability of load transmission, the inner core 21, the outer tube 23 and the sleeve 12 are coaxially arranged, that is, the central axes of the three are coincident, so as to ensure that the load from the power assembly can be uniformly and symmetrically transmitted through the entire rear suspension cushion assembly 200.

[0038] With reference to Figure 2 , Figure 3 In some embodiments, the outer framework 1 is provided with a reinforcing rib 3, and each fixing portion 11 and the sleeve 12 are connected through the reinforcing rib 3. Preferably, the fixing portion 11 for connecting the power assembly and the sleeve 12 for bearing the inner core assembly 2 are integrally connected through the reinforcing rib 3. By arranging the reinforcing rib 3, the load applied by the power assembly on the fixing portion 11 can be more directly and uniformly dispersed to the sleeve 12 and the entire outer framework 1, thereby reducing stress concentration and improving structural durability.

[0039] With reference to Figure 1 , Figure 3 In some embodiments, the rear suspension cushion assembly 200 is provided with a limiting bumper 4 on the side facing the opening 102, and the limiting bumper 4 abuts against the inner wall of the accommodating cavity 101. The limiting bumper 4 is made of rubber material. When the power assembly shakes greatly, the limiting bumper 4 contacts the inner wall of the accommodating cavity 101 and absorbs impact energy through its compression deformation, thereby avoiding excessive deformation of the inner core assembly 2 of the rear suspension cushion assembly 200 and damage, effectively protecting the entire rear suspension system.

[0040] In some embodiments, the limiting bumper 4 is provided with two limiting bumpers 4, which are arranged in the width direction of the rear suspension cushion assembly 200 and are adjacent to both ends of the opening 102 in the width direction, thereby providing constraints at both ends adjacent to the opening 102 in the width direction and improving stability.

[0041] As to the fixing mode of the limiting bumper 4, it can be reliably combined with the main structure of the rear suspension cushion assembly 200 through various optional connection forms.

[0042] With reference to Figure 1 , Figure 3 In some embodiments, the limiting bumper 4 can be clamped or adhered to the rear suspension cushion assembly 200. Specifically, the limiting bumper 4 is clamped or adhered to the outer framework 1 of the rear suspension cushion assembly 200, which is conducive to ensuring assembly efficiency. The limiting bumper 4 is decoupled from the rear suspension cushion assembly 200 and can be assembled separately, thereby realizing more design freedom.

[0043] In some embodiments, the upper end surface of the rear bracket 100 is provided with a plurality of mounting portions 5 for connecting with the vehicle body or subframe. The upper end surface of the rear bracket 100 is provided with two groups of mounting portion groups, which are spaced apart along the third direction and are respectively close to the two edges of the rear bracket 100 in the third direction. Each group of mounting portion groups includes at least two mounting portions 5, and the mounting portions 5 in the same group are spaced apart along the second direction. In this way, all mounting points form a stable and symmetrical support matrix, effectively improving the connection strength between the rear bracket 100 and the vehicle body.

[0044] In a specific example, the mounting portion 5 includes a mounting column and a mounting bolt. The mounting column is arranged on the rear bracket 100 and extends along the first direction. A threaded hole is formed in the mounting column. The upper end of the mounting bolt passes through the threaded hole and extends out of the upper end surface of the rear bracket 100. The upper end of the mounting bolt can be fixedly connected with the vehicle body. The bottom of the rear bracket 100 is provided with a mounting groove 104, and the lower end of the mounting bolt is embedded in the mounting groove 104. The mounting groove 104 provides a space for the lower end of the mounting bolt, so that the lower end of the mounting bolt can be completely embedded therein, thereby realizing flush with the bottom of the rear bracket 100 and ensuring the flatness of the whole.

[0045] According to the integrated rear suspension for a vehicle provided by the embodiment of the present application, the rear suspension cushion assembly 200 is embedded in the accommodating cavity 101 of the rear bracket 100, and the two are assembled together from the front-to-rear direction of the vehicle through the connecting piece. In this way, the rear suspension cushion assembly 200 and the rear bracket 100 overlap in the vertical direction, rather than being stacked together in the up-down direction as in the prior art. The design of the common height space greatly reduces the height of the entire rear suspension system in the first direction, and the structure is compact. Moreover, the accommodating cavity 101 of the rear bracket 100 not only provides mounting space for the rear suspension cushion assembly 200, but also constrains the rear suspension cushion assembly 200 in the front-to-rear direction (second direction) and left-to-right direction (third direction) by the inner wall of the accommodating cavity 101. The connecting piece not only has the function of fixing, but also directly bears the front-to-rear direction limiting function, which is stable and reliable. The lateral assembly through the opening 102 from the front of the vehicle has a wide operation space, which facilitates the installation and tightening of the connecting piece, and also provides convenience for subsequent inspection and maintenance.

[0046] In the description of the specification, reference to "one embodiment", "some embodiments", "an exemplary embodiment", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of the phrases "in one embodiment", "in some embodiments", "in an exemplary embodiment", "an example", "a specific example", or "some examples" in various places in the specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0047] Although embodiments of the application have been illustrated and described, it will be clear to those of ordinary skill in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the principles and the spirit of the application. The scope of the application is limited only by the claims and the equivalents thereof.

Claims

1. An integrated rear suspension for a vehicle, characterized in that, include: A rear support (100) is provided with a receiving cavity (101), the receiving cavity (101) extends through the rear support (100) along a first direction, and the rear support (100) has an opening (102) on its end face in a second direction, the opening (102) communicating with the receiving cavity (101), the first direction and the second direction being perpendicular to each other; A rear suspension cushion assembly (200) is disposed within the receiving cavity (101) and extends at least partially above the receiving cavity (101). The rear suspension cushion assembly (200) includes a fixing part (11) located above the receiving cavity (101) and the fixing part (11) is connected to the powertrain. A connector that fixes the rear suspension cushion assembly (200) and the rear bracket (100) along the second direction.

2. The integrated rear suspension for vehicles according to claim 1, characterized in that, The rear suspension cushion assembly (200) includes: An outer frame (1) is provided, on which a plurality of fixing parts (11) are formed, and the plurality of fixing parts (11) are all located above the rear support (100); The inner core assembly (2) is disposed inside the outer frame (1) and is interference-fitted with the outer frame (1).

3. The integrated rear suspension for vehicles according to claim 2, characterized in that, The inner core assembly (2) includes: The inner core (21) is provided with a mounting hole (211), and the connector passes through the mounting hole (211) and is fixed to the rear bracket (100); The main spring (22) is sleeved outside the inner core (21); The outer tube (23) is sleeved outside the main spring (22) and the outer tube (23) is interference-fitted inside the outer frame (1); The inner core (21), the main spring (22), and the outer tube (23) are vulcanized together.

4. The integrated rear suspension for vehicles according to claim 2, characterized in that, The outer frame (1) has a sleeve (12) on one side, and the inner core assembly (2) is located inside the sleeve (12) and is interference-fitted with the sleeve (12).

5. The integrated rear suspension for vehicles according to claim 3, characterized in that, The inner core (21) has a protrusion (212) on its peripheral wall, and the main spring (22) has a groove (221) on its inner peripheral wall that matches the protrusion (212).

6. The integrated rear suspension for vehicles according to claim 4, characterized in that, The outer frame (1) is provided with reinforcing ribs (3), and each of the fixing parts (11) and the sleeve (12) are connected by the reinforcing ribs (3).

7. The integrated rear suspension for vehicles according to claim 1, characterized in that, The rear suspension cushion assembly (200) is provided with a limiting block (4) on the side facing the opening (102), and the limiting block (4) abuts against the inner wall of the receiving cavity (101).

8. The integrated rear suspension for vehicles according to claim 7, characterized in that, Two limiting blocks (4) are provided, and the two limiting blocks (4) are spaced apart along the width direction of the rear suspension pad assembly (200). The two limiting blocks (4) are respectively adjacent to the two ends of the opening (102) in the width direction.

9. The integrated rear suspension for vehicles according to claim 7, characterized in that, The limiting block (4) is snapped or glued to the rear suspension cushion assembly (200).

10. The integrated rear suspension for a vehicle according to claim 1, characterized in that, The upper end face of the rear bracket (100) is provided with multiple mounting parts (5).

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