Single leaf spring front suspension and vehicle

Abstract

The present invention relates to a single-leaf spring front suspension and a vehicle, which includes two single-leaf springs, two eye-end bracket assemblies and a crossbeam. The middle parts of the two single-leaf springs are connected to the vehicle axle, one end of the two single-leaf springs is connected to the vehicle frame, and the other ends of the two single-leaf springs are respectively connected to the vehicle frame via the two eye-end bracket assemblies. The crossbeam connects the two eye-end bracket assemblies. The two eye-end bracket assemblies can be made to move synchronously by the provided crossbeam, which can play a safety protection role when the single-sided single-leaf spring breaks. Specifically, when the front half of the single-leaf spring on one side (i.e., the part away from the eye-end bracket assembly) breaks somewhere, due to the connecting effect of the crossbeam, the eye-end bracket assembly on the broken side still moves synchronously with the eye-end bracket assembly on the unbroken side, the suspension guiding function is not lost, and the vehicle safety can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and in particular to a single-leaf spring front suspension and a vehicle. Background Art

[0002] Monoleaf springs, which carry only one leaf spring, can achieve lightweighting in suspension systems. Generally, a monoleaf spring used in a front suspension must not compromise vehicle safety if it breaks. Considering the potential impact of a broken monoleaf spring on vehicle safety, some monoleaf springs feature an infinite lifespan design—increasing the material strength or reducing the spring's stress to ensure a lifespan equal to that of the vehicle. Others utilize more complex or heavier limiter mechanisms.

[0003] To ensure the safety of using single leaf springs, the above designs all have defects, as follows:

[0004] 1) For single leaf springs designed for unlimited life, due to the limitations of current manufacturing levels, it is difficult for the produced single leaf springs to meet the above requirements;

[0005] 2) For single-leaf spring front suspensions equipped with protection mechanisms, the protection mechanisms are prone to failure in extreme situations. At the same time, some of the current single-leaf spring suspension protection mechanisms have complex structures, are difficult to install and maintain, have poor parts versatility, and have single functions.

[0006] 3) The front suspension adopts a single leaf spring. Due to the low dynamic stiffness of the single leaf spring, the anti-roll performance of the front suspension is poor compared with the conventional small leaf spring or multi-leaf spring.

[0007] In summary, once the existing single leaf spring breaks, the front suspension loses its guiding function, causing the axle to shift, and the anti-roll performance is poor. Summary of the Invention

[0008] In view of this, it is necessary to provide a single leaf spring front suspension and a vehicle to solve the problem that once the existing single leaf spring breaks, the front suspension loses its guiding function, resulting in axle displacement and poor anti-roll performance.

[0009] The present invention provides a single-leaf spring front suspension, comprising two single-leaf springs, two eye-end bracket assemblies and a crossbeam, wherein the middle parts of the two single-leaf springs are connected to the vehicle axle, one end of the two single-leaf springs is connected to the vehicle frame, and the other ends of the two single-leaf springs are respectively connected to the vehicle frame via the two eye-end bracket assemblies, and the crossbeam connects the two eye-end bracket assemblies.

[0010] Furthermore, the crossbeam includes two connecting beams, two connecting plates, an adjustment gasket and a first connecting member. The opposite sides of the two connecting beams are respectively connected to the two ear end bracket assemblies, and the opposite sides are respectively connected to the two connecting plates. The adjustment gasket is arranged at a position between the two connecting plates. The two connecting plates and the adjustment gasket are connected via the first connecting member. The number and thickness of the adjustment gaskets are adjustable.

[0011] Furthermore, a wedge-shaped boss is provided on the top of the connecting beam, and a wedge-shaped groove is formed on the bottom of the ear-end bracket assembly, and the wedge-shaped boss is embedded in the wedge-shaped groove.

[0012] Furthermore, a first screw mounting hole is formed on the connecting beam, and a second screw mounting hole is formed on the connecting plate and the adjusting gasket. The first connecting member includes a plurality of first connecting screws and a plurality of first connecting nuts, wherein a part of the first connecting screws sequentially pass through the third screw mounting hole formed at the bottom of the ear end bracket assembly and the first screw mounting hole on the connecting beam and are connected to the corresponding first connecting nut, and another part of the first connecting screws sequentially pass through the second screw mounting hole on one of the connecting plates, the adjusting gasket and the other connecting plate and are connected to the corresponding first connecting nut.

[0013] Furthermore, the ear end bracket assembly includes two opposite ears and an ear end bracket, the opposite sides of the bottom of the two ears are connected to the single leaf spring, the bottoms of the two ears are connected to the crossbeam, the tops of the two ears are respectively connected to the two sides of the ear end bracket, and the ear end bracket is connected to the frame.

[0014] Furthermore, one side of the ear-end bracket is fixedly connected with two oppositely arranged limiting bosses, and the two ears are respectively arranged at the position between the two limiting bosses on the corresponding sides.

[0015] Furthermore, the limiting boss is arranged on the opposite side and / or the opposite side of the two ear end brackets.

[0016] Furthermore, when the single leaf spring is not broken, the lifting ear and the limiting boss are spaced apart.

[0017] Furthermore, a first circular hole and a second circular hole are formed on the lifting ear, and the lifting ear end bracket assembly also includes two second connecting parts, wherein one of the second connecting parts passes through the first circular hole on one of the lifting ears, the first rubber bushing provided on the lifting ear end bracket, and the first circular hole on the other lifting ear, and the other second connecting part passes through the second circular hole on one of the lifting ears, the second rubber bushing connected to the single leaf spring, and the second circular hole on the other lifting ear.

[0018] The present invention also provides a vehicle comprising the above-mentioned single-leaf spring front suspension.

[0019] Compared with the existing technology, the crossbeam is set up to enable the two ear-end bracket assemblies to move synchronously, which can play a safety protection role when a single-side single-leaf spring breaks. Specifically, when the front half of the single-leaf spring on one side (i.e., the part away from the ear-end bracket assembly) breaks somewhere, due to the connecting effect of the crossbeam, the ear-end bracket assembly on the broken side still moves synchronously with the ear-end bracket assembly on the unbroken side, the suspension guiding function is not lost, and the vehicle safety can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of a single-leaf spring front suspension provided by an embodiment of the present invention;

[0021] Figure 2 A schematic structural diagram of a crossbeam in a single-leaf spring front suspension according to an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of the arrangement of a wedge-shaped boss in a single-leaf spring front suspension according to an embodiment of the present invention;

[0023] Figure 4 A schematic structural diagram of a lifting eye in a single-leaf spring front suspension according to an embodiment of the present invention;

[0024] Figure 5 A schematic structural diagram of a lifting eye end bracket in a single-leaf spring front suspension according to an embodiment of the present invention;

[0025] Figure 6 A schematic diagram of the connection between the eye-end bracket and the first rubber bushing in the single-leaf spring front suspension provided by an embodiment of the present invention;

[0026] Figure 7 This is a schematic structural diagram of the eye-end bracket assembly in a single-leaf spring front suspension provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0028] like Figure 1-2As shown, the present invention provides a single-leaf spring front suspension, including two single-leaf springs 100, two ear-end bracket assemblies 200 and a crossbeam 300. The middle parts of the two single-leaf springs 100 are connected to the axle N, one end of the two single-leaf springs 100 is connected to the frame M, and the other ends of the two single-leaf springs 100 are respectively connected to the frame M via two ear-end bracket assemblies 200. The crossbeam 300 connects the two ear-end bracket assemblies 200.

[0029] During implementation, the crossbeam 300 provided can enable the two ear-end bracket assemblies 200 to move synchronously, and can play a safety protection role when the single-sided single-leaf spring 100 breaks. Specifically, when the front half of the single-leaf spring 100 on one side (i.e., the part away from the ear-end bracket assembly 200) breaks somewhere, due to the connecting effect of the crossbeam 300, the ear-end bracket assembly 200 on the broken side still moves synchronously with the ear-end bracket assembly 200 on the unbroken side, the suspension guiding function is not lost, and the vehicle safety can be guaranteed. In addition, since the ear-end bracket assemblies 200 on both sides move synchronously, the movement of the ear-end bracket assembly 200 on one side relative to the ear-end bracket assembly 200 on the other side can be prevented under the rolling condition, which is equivalent to additionally increasing the roll angle stiffness of the suspension, thereby compensating for the defect of poor handling stability characteristics caused by insufficient dynamic stiffness of the single-leaf spring 100.

[0030] The single leaf spring 100 in this embodiment has a structure that can be imagined by those skilled in the art.

[0031] The ear end bracket assembly 200 in this embodiment is a structure that connects the single leaf spring 100 , the cross beam 300 and the ear end bracket assembly 200 .

[0032] In one embodiment, the crossbeam 300 includes two connecting beams 310, two connecting plates 320, an adjustment gasket 330 and a first connecting member 340. The opposite sides of the two connecting beams 310 are respectively connected to the two ear end bracket assemblies 200, and the opposite sides are respectively connected to the two connecting plates 320. The adjustment gasket 330 is arranged at a position between the two connecting plates 320. The two connecting plates 320 and the adjustment gasket 330 are connected via the first connecting member 340. The number and thickness of the adjustment gaskets 330 are adjustable.

[0033] The two connecting beams 310 are respectively connected to the two lifting ear end bracket assemblies 200 , and opposite sides of the two connecting beams 310 are connected via a connecting plate 320 , an adjusting gasket 330 and a first connecting member 340 .

[0034] The adjustment gasket 330 can be designed to have different thicknesses. During assembly, a single adjustment gasket 330 of corresponding thickness or a combination of multiple adjustment gaskets 330 can be selected as needed. The adjustment gasket 330 can be made of metal, rubber, or a combination of the two. The adjustment gasket 330, the first connector 340, and the two connecting plates 320 can be used to connect the two connecting beams 310 to form a single unit.

[0035] By adjusting the number and thickness of the adjustment pads 330 installed between the two connecting plates 320, the installation position between the two connecting beams 310 can be controlled, solving the problem of difficult or impossible installation caused by factors such as manufacturing errors of the frame M and suspension parts.

[0036] In order to achieve the connection between the above-mentioned connecting beams 310 and between the connecting beam 310 and the ear end bracket assembly 200, in this embodiment, a first screw mounting hole 312 is formed on the connecting beam 310, and a second screw mounting hole 321 is formed on the connecting plate 320 and the adjusting gasket 330. The first connecting member 340 includes a plurality of first connecting screws and a plurality of first connecting nuts, wherein a part of the first connecting screws sequentially pass through the third screw mounting hole 212 formed at the bottom of the ear end bracket assembly 200 and the first screw mounting hole 312 on the connecting beam 310, and are connected to the corresponding first connecting nuts, and another part of the first connecting screws sequentially pass through one of the connecting plates 320, the adjusting gasket 330 and the second screw mounting hole 321 on the other connecting plate 320, and are connected to the corresponding first connecting nuts.

[0037] like Figure 3-4 As shown, in one embodiment, a wedge-shaped boss 311 is provided on the top of the connecting beam 310 , a wedge-shaped groove 211 is formed on the bottom of the ear-end bracket assembly 200 , and the wedge-shaped boss 311 is embedded in the wedge-shaped groove 211 .

[0038] The length, width and height of the wedge-shaped boss 311 are all smaller than the length and width of the wedge-shaped groove 211, and the wedge-shaped boss 311 abuts against the wedge-shaped groove 211. It is understood that the wedge-shaped boss 311 can also be cylindrical, etc., and this is not limited.

[0039] The eye-end bracket assembly 200 in this embodiment is a structure that connects the single leaf spring 100, the crossbeam 300, and the vehicle frame M. The eye-end bracket assembly 200 includes two opposing eyes 210 and an eye-end bracket 220. The bottom opposite sides of the two eyes 210 are connected to the single leaf spring 100, the bottoms of the two eyes 210 are connected to the crossbeam 300, and the tops of the two eyes 210 are respectively connected to the two sides of the eye-end bracket 220. The eye-end bracket 220 is connected to the vehicle frame M.

[0040] like Figure 5-7As shown, in one embodiment, two opposing limiting bosses 221 are fixedly connected to one side of the ear-end bracket 220, and the two ear-ends 210 are respectively disposed between the two limiting bosses 221 on the corresponding sides. It should be noted that when the single-leaf spring 100 is not broken, the ear-ends 210 and the limiting bosses 221 are spaced apart.

[0041] When both leaf springs 100 break simultaneously, two scenarios occur: Scenario 1: The front halves of both leaf springs 100 break; Scenario 2: The front half of one leaf spring 100 breaks, losing its guiding function, while the rear half of the other leaf spring 100 breaks, but retains its guiding function. In these scenarios, the lifting lug 210 rotates a certain angle around the lifting lug end bracket 220, abutting the lifting lug 210 against the limiting boss 221, preventing further movement of the front axle and ensuring that the front axle remains perpendicular to the center plane of the longitudinal beam of the vehicle frame M. This avoids the safety hazard of axle rotation caused by a broken leaf spring 100.

[0042] It is understandable that when only the rear section of the leaf spring 100 breaks (on one side or both sides), the suspension guiding function will not be affected, and the cross member 300 will not play a protective role at this time.

[0043] At the same time, when the single-leaf spring 100 front suspension is operating normally, the connecting beams 310 on both sides improve the load-bearing between the eye-end brackets 220 and the longitudinal rails of the vehicle frame M. Because the eye 210 on each side moves synchronously, the relative movement of one eye 210 relative to the other eye 210 is prevented during roll conditions. This effectively increases the suspension's roll stiffness, compensating for the poor handling characteristics often associated with insufficient dynamic stiffness in the single-leaf spring 100.

[0044] In one embodiment, the limiting boss 221 is disposed on the opposite side and / or the opposite side of the two ear end brackets 220. It is understood that the location of the limiting boss 221 is not limited, as long as it can be matched with at least one of the ears 210.

[0045] In one embodiment, a first circular hole 213 and a second circular hole 214 are formed on the lifting ear 210. The lifting ear end bracket assembly 200 further includes two second connecting members 230. One second connecting member 230 is disposed through the first circular hole 213 on one lifting ear 210, the first rubber bushing 222 provided on the lifting ear end bracket 220, and the first circular hole 213 on the other lifting ear 210. The other second connecting member 230 is disposed through the second circular hole 214 on one lifting ear 210, the second rubber bushing 110 connected to the single leaf spring 100, and the second circular hole 214 on the other lifting ear 210. The second connecting member 230 can be a structure such as a leaf spring pin.

[0046] Among them, the first rubber bushing 222 is arranged in the through hole 223 formed on the ear end bracket 220, and a plurality of fourth screw mounting holes 324 are formed on the ear end bracket 220. The second connecting screw passes through the fourth screw mounting hole 324 and the frame M and can be connected to the second connecting nut, thereby realizing the connection between the ear end bracket 220 and the frame M bracket.

[0047] The present invention also provides a vehicle, including a front suspension with a single leaf spring 100, wherein the end of the single leaf spring 100 away from the eye end bracket assembly 200 is fixedly connected to the frame M via a fixed end bracket 400, and the middle part of the single leaf spring 100 is installed on the axle N and connected to the frame M via a shock absorber 500.

[0048] Compared with existing technologies:

[0049] 1) The crossbeam 300 can make the lifting ears 210 on both sides move synchronously, playing a safety protection role when the single leaf spring 100 on one side breaks;

[0050] 2) The wedge-shaped boss 311 cooperates with the wedge-shaped groove 211 and the use of the adjustment washer 330, which not only facilitates assembly and improves connection reliability, but also improves the force applied to the eye-end brackets 220 on both sides and the longitudinal beam of the frame M, effectively reducing the weight of the eye-end brackets 220.

[0051] 3) When the single leaf springs 100 on both sides break at the same time, the position limiting between the lifting lug 210 and the limiting boss 221 can provide a safety protection.

[0052] 4) It makes up for the defect of poor handling stability caused by insufficient dynamic stiffness of the single leaf spring 100.

[0053] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the scope of protection of the present invention.

Claims

1. A single leaf spring front suspension, characterized in that: include: Two single leaf springs and two lifting eye end bracket assemblies, wherein the middle portions of the two single leaf springs are connected to the axle, one end of the two single leaf springs is connected to the vehicle frame, and the other ends of the two single leaf springs are connected to the vehicle frame via the two lifting eye end bracket assemblies; a crossbeam connecting the two lifting eye end bracket assemblies; The crossbeam includes two connecting beams, two connecting plates, an adjustment gasket and a first connecting member. The opposite sides of the two connecting beams are respectively connected to the two ear end bracket assemblies, and the opposite sides are respectively connected to the two connecting plates. The adjustment gasket is arranged at a position between the two connecting plates. The two connecting plates and the adjustment gasket are connected via the first connecting member. The number and thickness of the adjustment gaskets are adjustable.

2. The single leaf spring front suspension according to claim 1, characterized in that: A wedge-shaped boss is provided on the top of the connecting beam, and a wedge-shaped groove is formed on the bottom of the ear-end bracket assembly, and the wedge-shaped boss is embedded in the wedge-shaped groove.

3. The single leaf spring front suspension according to claim 2, characterized in that: A first screw mounting hole is formed on the connecting beam, and a second screw mounting hole is formed on the connecting plate and the adjusting gasket. The first connecting member includes a plurality of first connecting screws and a plurality of first connecting nuts, wherein a part of the first connecting screws sequentially pass through the third screw mounting hole formed at the bottom of the ear end bracket assembly and the first screw mounting hole on the connecting beam and are connected to the corresponding first connecting nuts, and another part of the first connecting screws sequentially pass through the second screw mounting hole on one of the connecting plates, the adjusting gasket and the other connecting plate and are connected to the corresponding first connecting nuts.

4. The single leaf spring front suspension according to claim 1, characterized in that: The ear end bracket assembly includes two opposite ear ends and an ear end bracket. The opposite sides of the bottom of the two ear ends are connected to the single leaf spring, the bottoms of the two ear ends are connected to the crossbeam, the tops of the two ear ends are respectively connected to the two sides of the ear end bracket, and the ear end bracket is connected to the vehicle frame.

5. The single leaf spring front suspension according to claim 4, characterized in that: One side of the ear end bracket is fixedly connected with two oppositely arranged limiting bosses, and the two ears are respectively arranged at the position between the two limiting bosses on the corresponding sides.

6. The single leaf spring front suspension according to claim 5, characterized in that: The limiting boss is arranged on the opposite side and / or the opposite side of the two ear end brackets.

7. The single leaf spring front suspension according to claim 5, characterized in that: When the single leaf spring is not broken, the lifting ear and the limiting boss are spaced apart.

8. The single leaf spring front suspension according to claim 5, characterized in that: A first circular hole and a second circular hole are formed on the lifting ear, and the lifting ear end bracket assembly also includes two second connecting parts, one of the second connecting parts is passed through the first circular hole on one of the lifting ears, the first rubber bushing provided on the lifting ear end bracket and the first circular hole on the other lifting ear, and the other second connecting part is passed through the second circular hole on one of the lifting ears, the second rubber bushing connected to the single leaf spring and the second circular hole on the other lifting ear.

9. A vehicle, characterized in that: The invention comprises a single leaf spring front suspension as claimed in any one of claims 1 to 8.

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